net/mac80211/cfg.c

   1 /*
   2  * mac80211 configuration hooks for cfg80211
   3  *
   4  * Copyright 2006-2010  Johannes Berg <johannes@sipsolutions.net>
   5  * Copyright 2013-2015  Intel Mobile Communications GmbH
   6  *
   7  * This file is GPLv2 as found in COPYING.
   8  */
   9
  10 #include <linux/ieee80211.h>
  11 #include <linux/nl80211.h>
  12 #include <linux/rtnetlink.h>
  13 #include <linux/slab.h>
  14 #include <net/net_namespace.h>
  15 #include <linux/rcupdate.h>
  16 #include <linux/if_ether.h>
  17 #include <net/cfg80211.h>
  18 #include "ieee80211_i.h"
  19 #include "driver-ops.h"
  20 #include "cfg.h"
  21 #include "rate.h"
  22 #include "mesh.h"
  23 #include "wme.h"
  24
  25 static struct wireless_dev *ieee80211_add_iface(struct wiphy *wiphy,
  26                                                 const char *name,
  27                                                 unsigned char name_assign_type,
  28                                                 enum nl80211_iftype type,
  29                                                 u32 *flags,
  30                                                 struct vif_params *params)
  31 {
  32         struct ieee80211_local *local = wiphy_priv(wiphy);
  33         struct wireless_dev *wdev;
  34         struct ieee80211_sub_if_data *sdata;
  35         int err;
  36
  37         err = ieee80211_if_add(local, name, name_assign_type, &wdev, type, params);
  38         if (err)
  39                 return ERR_PTR(err);
  40
  41         if (type == NL80211_IFTYPE_MONITOR && flags) {
  42                 sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
  43                 sdata->u.mntr_flags = *flags;
  44         }
  45
  46         return wdev;
  47 }
  48
  49 static int ieee80211_del_iface(struct wiphy *wiphy, struct wireless_dev *wdev)
  50 {
  51         ieee80211_if_remove(IEEE80211_WDEV_TO_SUB_IF(wdev));
  52
  53         return 0;
  54 }
  55
  56 static int ieee80211_change_iface(struct wiphy *wiphy,
  57                                   struct net_device *dev,
  58                                   enum nl80211_iftype type, u32 *flags,
  59                                   struct vif_params *params)
  60 {
  61         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
  62         int ret;
  63
  64         ret = ieee80211_if_change_type(sdata, type);
  65         if (ret)
  66                 return ret;
  67
  68         if (type == NL80211_IFTYPE_AP_VLAN &&
  69             params && params->use_4addr == 0)
  70                 RCU_INIT_POINTER(sdata->u.vlan.sta, NULL);
  71         else if (type == NL80211_IFTYPE_STATION &&
  72                  params && params->use_4addr >= 0)
  73                 sdata->u.mgd.use_4addr = params->use_4addr;
  74
  75         if (sdata->vif.type == NL80211_IFTYPE_MONITOR && flags) {
  76                 struct ieee80211_local *local = sdata->local;
  77
  78                 if (ieee80211_sdata_running(sdata)) {
  79                         u32 mask = MONITOR_FLAG_COOK_FRAMES |
  80                                    MONITOR_FLAG_ACTIVE;
  81
  82                         /*
  83                          * Prohibit MONITOR_FLAG_COOK_FRAMES and
  84                          * MONITOR_FLAG_ACTIVE to be changed while the
  85                          * interface is up.
  86                          * Else we would need to add a lot of cruft
  87                          * to update everything:
  88                          *      cooked_mntrs, monitor and all fif_* counters
  89                          *      reconfigure hardware
  90                          */
  91                         if ((*flags & mask) != (sdata->u.mntr_flags & mask))
  92                                 return -EBUSY;
  93
  94                         ieee80211_adjust_monitor_flags(sdata, -1);
  95                         sdata->u.mntr_flags = *flags;
  96                         ieee80211_adjust_monitor_flags(sdata, 1);
  97
  98                         ieee80211_configure_filter(local);
  99                 } else {
 100                         /*
 101                          * Because the interface is down, ieee80211_do_stop
 102                          * and ieee80211_do_open take care of "everything"
 103                          * mentioned in the comment above.
 104                          */
 105                         sdata->u.mntr_flags = *flags;
 106                 }
 107         }
 108
 109         return 0;
 110 }
 111
 112 static int ieee80211_start_p2p_device(struct wiphy *wiphy,
 113                                       struct wireless_dev *wdev)
 114 {
 115         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
 116         int ret;
 117
 118         mutex_lock(&sdata->local->chanctx_mtx);
 119         ret = ieee80211_check_combinations(sdata, NULL, 0, 0);
 120         mutex_unlock(&sdata->local->chanctx_mtx);
 121         if (ret < 0)
 122                 return ret;
 123
 124         return ieee80211_do_open(wdev, true);
 125 }
 126
 127 static void ieee80211_stop_p2p_device(struct wiphy *wiphy,
 128                                       struct wireless_dev *wdev)
 129 {
 130         ieee80211_sdata_stop(IEEE80211_WDEV_TO_SUB_IF(wdev));
 131 }
 132
 133 static int ieee80211_set_noack_map(struct wiphy *wiphy,
 134                                   struct net_device *dev,
 135                                   u16 noack_map)
 136 {
 137         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 138
 139         sdata->noack_map = noack_map;
 140
 141         ieee80211_check_fast_xmit_iface(sdata);
 142
 143         return 0;
 144 }
 145
 146 static int ieee80211_add_key(struct wiphy *wiphy, struct net_device *dev,
 147                              u8 key_idx, bool pairwise, const u8 *mac_addr,
 148                              struct key_params *params)
 149 {
 150         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 151         struct ieee80211_local *local = sdata->local;
 152         struct sta_info *sta = NULL;
 153         const struct ieee80211_cipher_scheme *cs = NULL;
 154         struct ieee80211_key *key;
 155         int err;
 156
 157         if (!ieee80211_sdata_running(sdata))
 158                 return -ENETDOWN;
 159
 160         /* reject WEP and TKIP keys if WEP failed to initialize */
 161         switch (params->cipher) {
 162         case WLAN_CIPHER_SUITE_WEP40:
 163         case WLAN_CIPHER_SUITE_TKIP:
 164         case WLAN_CIPHER_SUITE_WEP104:
 165                 if (IS_ERR(local->wep_tx_tfm))
 166                         return -EINVAL;
 167                 break;
 168         case WLAN_CIPHER_SUITE_CCMP:
 169         case WLAN_CIPHER_SUITE_CCMP_256:
 170         case WLAN_CIPHER_SUITE_AES_CMAC:
 171         case WLAN_CIPHER_SUITE_BIP_CMAC_256:
 172         case WLAN_CIPHER_SUITE_BIP_GMAC_128:
 173         case WLAN_CIPHER_SUITE_BIP_GMAC_256:
 174         case WLAN_CIPHER_SUITE_GCMP:
 175         case WLAN_CIPHER_SUITE_GCMP_256:
 176                 break;
 177         default:
 178                 cs = ieee80211_cs_get(local, params->cipher, sdata->vif.type);
 179                 break;
 180         }
 181
 182         key = ieee80211_key_alloc(params->cipher, key_idx, params->key_len,
 183                                   params->key, params->seq_len, params->seq,
 184                                   cs);
 185         if (IS_ERR(key))
 186                 return PTR_ERR(key);
 187
 188         if (pairwise)
 189                 key->conf.flags |= IEEE80211_KEY_FLAG_PAIRWISE;
 190
 191         mutex_lock(&local->sta_mtx);
 192
 193         if (mac_addr) {
 194                 if (ieee80211_vif_is_mesh(&sdata->vif))
 195                         sta = sta_info_get(sdata, mac_addr);
 196                 else
 197                         sta = sta_info_get_bss(sdata, mac_addr);
 198                 /*
 199                  * The ASSOC test makes sure the driver is ready to
 200                  * receive the key. When wpa_supplicant has roamed
 201                  * using FT, it attempts to set the key before
 202                  * association has completed, this rejects that attempt
 203                  * so it will set the key again after association.
 204                  *
 205                  * TODO: accept the key if we have a station entry and
 206                  *       add it to the device after the station.
 207                  */
 208                 if (!sta || !test_sta_flag(sta, WLAN_STA_ASSOC)) {
 209                         ieee80211_key_free_unused(key);
 210                         err = -ENOENT;
 211                         goto out_unlock;
 212                 }
 213         }
 214
 215         switch (sdata->vif.type) {
 216         case NL80211_IFTYPE_STATION:
 217                 if (sdata->u.mgd.mfp != IEEE80211_MFP_DISABLED)
 218                         key->conf.flags |= IEEE80211_KEY_FLAG_RX_MGMT;
 219                 break;
 220         case NL80211_IFTYPE_AP:
 221         case NL80211_IFTYPE_AP_VLAN:
 222                 /* Keys without a station are used for TX only */
 223                 if (key->sta && test_sta_flag(key->sta, WLAN_STA_MFP))
 224                         key->conf.flags |= IEEE80211_KEY_FLAG_RX_MGMT;
 225                 break;
 226         case NL80211_IFTYPE_ADHOC:
 227                 /* no MFP (yet) */
 228                 break;
 229         case NL80211_IFTYPE_MESH_POINT:
 230 #ifdef CONFIG_MAC80211_MESH
 231                 if (sdata->u.mesh.security != IEEE80211_MESH_SEC_NONE)
 232                         key->conf.flags |= IEEE80211_KEY_FLAG_RX_MGMT;
 233                 break;
 234 #endif
 235         case NL80211_IFTYPE_WDS:
 236         case NL80211_IFTYPE_MONITOR:
 237         case NL80211_IFTYPE_P2P_DEVICE:
 238         case NL80211_IFTYPE_UNSPECIFIED:
 239         case NUM_NL80211_IFTYPES:
 240         case NL80211_IFTYPE_P2P_CLIENT:
 241         case NL80211_IFTYPE_P2P_GO:
 242         case NL80211_IFTYPE_OCB:
 243                 /* shouldn't happen */
 244                 WARN_ON_ONCE(1);
 245                 break;
 246         }
 247
 248         if (sta)
 249                 sta->cipher_scheme = cs;
 250
 251         err = ieee80211_key_link(key, sdata, sta);
 252
 253  out_unlock:
 254         mutex_unlock(&local->sta_mtx);
 255
 256         return err;
 257 }
 258
 259 static int ieee80211_del_key(struct wiphy *wiphy, struct net_device *dev,
 260                              u8 key_idx, bool pairwise, const u8 *mac_addr)
 261 {
 262         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 263         struct ieee80211_local *local = sdata->local;
 264         struct sta_info *sta;
 265         struct ieee80211_key *key = NULL;
 266         int ret;
 267
 268         mutex_lock(&local->sta_mtx);
 269         mutex_lock(&local->key_mtx);
 270
 271         if (mac_addr) {
 272                 ret = -ENOENT;
 273
 274                 sta = sta_info_get_bss(sdata, mac_addr);
 275                 if (!sta)
 276                         goto out_unlock;
 277
 278                 if (pairwise)
 279                         key = key_mtx_dereference(local, sta->ptk[key_idx]);
 280                 else
 281                         key = key_mtx_dereference(local, sta->gtk[key_idx]);
 282         } else
 283                 key = key_mtx_dereference(local, sdata->keys[key_idx]);
 284
 285         if (!key) {
 286                 ret = -ENOENT;
 287                 goto out_unlock;
 288         }
 289
 290         ieee80211_key_free(key, true);
 291
 292         ret = 0;
 293  out_unlock:
 294         mutex_unlock(&local->key_mtx);
 295         mutex_unlock(&local->sta_mtx);
 296
 297         return ret;
 298 }
 299
 300 static int ieee80211_get_key(struct wiphy *wiphy, struct net_device *dev,
 301                              u8 key_idx, bool pairwise, const u8 *mac_addr,
 302                              void *cookie,
 303                              void (*callback)(void *cookie,
 304                                               struct key_params *params))
 305 {
 306         struct ieee80211_sub_if_data *sdata;
 307         struct sta_info *sta = NULL;
 308         u8 seq[6] = {0};
 309         struct key_params params;
 310         struct ieee80211_key *key = NULL;
 311         u64 pn64;
 312         u32 iv32;
 313         u16 iv16;
 314         int err = -ENOENT;
 315         struct ieee80211_key_seq kseq = {};
 316
 317         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 318
 319         rcu_read_lock();
 320
 321         if (mac_addr) {
 322                 sta = sta_info_get_bss(sdata, mac_addr);
 323                 if (!sta)
 324                         goto out;
 325
 326                 if (pairwise && key_idx < NUM_DEFAULT_KEYS)
 327                         key = rcu_dereference(sta->ptk[key_idx]);
 328                 else if (!pairwise &&
 329                          key_idx < NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS)
 330                         key = rcu_dereference(sta->gtk[key_idx]);
 331         } else
 332                 key = rcu_dereference(sdata->keys[key_idx]);
 333
 334         if (!key)
 335                 goto out;
 336
 337         memset(&params, 0, sizeof(params));
 338
 339         params.cipher = key->conf.cipher;
 340
 341         switch (key->conf.cipher) {
 342         case WLAN_CIPHER_SUITE_TKIP:
 343                 iv32 = key->u.tkip.tx.iv32;
 344                 iv16 = key->u.tkip.tx.iv16;
 345
 346                 if (key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE &&
 347                     !(key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV)) {
 348                         drv_get_key_seq(sdata->local, key, &kseq);
 349                         iv32 = kseq.tkip.iv32;
 350                         iv16 = kseq.tkip.iv16;
 351                 }
 352
 353                 seq[0] = iv16 & 0xff;
 354                 seq[1] = (iv16 >> 8) & 0xff;
 355                 seq[2] = iv32 & 0xff;
 356                 seq[3] = (iv32 >> 8) & 0xff;
 357                 seq[4] = (iv32 >> 16) & 0xff;
 358                 seq[5] = (iv32 >> 24) & 0xff;
 359                 params.seq = seq;
 360                 params.seq_len = 6;
 361                 break;
 362         case WLAN_CIPHER_SUITE_CCMP:
 363         case WLAN_CIPHER_SUITE_CCMP_256:
 364         case WLAN_CIPHER_SUITE_AES_CMAC:
 365         case WLAN_CIPHER_SUITE_BIP_CMAC_256:
 366                 BUILD_BUG_ON(offsetof(typeof(kseq), ccmp) !=
 367                              offsetof(typeof(kseq), aes_cmac));
 368         case WLAN_CIPHER_SUITE_BIP_GMAC_128:
 369         case WLAN_CIPHER_SUITE_BIP_GMAC_256:
 370                 BUILD_BUG_ON(offsetof(typeof(kseq), ccmp) !=
 371                              offsetof(typeof(kseq), aes_gmac));
 372         case WLAN_CIPHER_SUITE_GCMP:
 373         case WLAN_CIPHER_SUITE_GCMP_256:
 374                 BUILD_BUG_ON(offsetof(typeof(kseq), ccmp) !=
 375                              offsetof(typeof(kseq), gcmp));
 376
 377                 if (key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE &&
 378                     !(key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV)) {
 379                         drv_get_key_seq(sdata->local, key, &kseq);
 380                         memcpy(seq, kseq.ccmp.pn, 6);
 381                 } else {
 382                         pn64 = atomic64_read(&key->conf.tx_pn);
 383                         seq[0] = pn64;
 384                         seq[1] = pn64 >> 8;
 385                         seq[2] = pn64 >> 16;
 386                         seq[3] = pn64 >> 24;
 387                         seq[4] = pn64 >> 32;
 388                         seq[5] = pn64 >> 40;
 389                 }
 390                 params.seq = seq;
 391                 params.seq_len = 6;
 392                 break;
 393         default:
 394                 if (!(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
 395                         break;
 396                 if (WARN_ON(key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV))
 397                         break;
 398                 drv_get_key_seq(sdata->local, key, &kseq);
 399                 params.seq = kseq.hw.seq;
 400                 params.seq_len = kseq.hw.seq_len;
 401                 break;
 402         }
 403
 404         params.key = key->conf.key;
 405         params.key_len = key->conf.keylen;
 406
 407         callback(cookie, &params);
 408         err = 0;
 409
 410  out:
 411         rcu_read_unlock();
 412         return err;
 413 }
 414
 415 static int ieee80211_config_default_key(struct wiphy *wiphy,
 416                                         struct net_device *dev,
 417                                         u8 key_idx, bool uni,
 418                                         bool multi)
 419 {
 420         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 421
 422         ieee80211_set_default_key(sdata, key_idx, uni, multi);
 423
 424         return 0;
 425 }
 426
 427 static int ieee80211_config_default_mgmt_key(struct wiphy *wiphy,
 428                                              struct net_device *dev,
 429                                              u8 key_idx)
 430 {
 431         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 432
 433         ieee80211_set_default_mgmt_key(sdata, key_idx);
 434
 435         return 0;
 436 }
 437
 438 void sta_set_rate_info_tx(struct sta_info *sta,
 439                           const struct ieee80211_tx_rate *rate,
 440                           struct rate_info *rinfo)
 441 {
 442         rinfo->flags = 0;
 443         if (rate->flags & IEEE80211_TX_RC_MCS) {
 444                 rinfo->flags |= RATE_INFO_FLAGS_MCS;
 445                 rinfo->mcs = rate->idx;
 446         } else if (rate->flags & IEEE80211_TX_RC_VHT_MCS) {
 447                 rinfo->flags |= RATE_INFO_FLAGS_VHT_MCS;
 448                 rinfo->mcs = ieee80211_rate_get_vht_mcs(rate);
 449                 rinfo->nss = ieee80211_rate_get_vht_nss(rate);
 450         } else {
 451                 struct ieee80211_supported_band *sband;
 452                 int shift = ieee80211_vif_get_shift(&sta->sdata->vif);
 453                 u16 brate;
 454
 455                 sband = sta->local->hw.wiphy->bands[
 456                                 ieee80211_get_sdata_band(sta->sdata)];
 457                 brate = sband->bitrates[rate->idx].bitrate;
 458                 rinfo->legacy = DIV_ROUND_UP(brate, 1 << shift);
 459         }
 460         if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
 461                 rinfo->bw = RATE_INFO_BW_40;
 462         else if (rate->flags & IEEE80211_TX_RC_80_MHZ_WIDTH)
 463                 rinfo->bw = RATE_INFO_BW_80;
 464         else if (rate->flags & IEEE80211_TX_RC_160_MHZ_WIDTH)
 465                 rinfo->bw = RATE_INFO_BW_160;
 466         else
 467                 rinfo->bw = RATE_INFO_BW_20;
 468         if (rate->flags & IEEE80211_TX_RC_SHORT_GI)
 469                 rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI;
 470 }
 471
 472 void sta_set_rate_info_rx(struct sta_info *sta, struct rate_info *rinfo)
 473 {
 474         rinfo->flags = 0;
 475
 476         if (sta->last_rx_rate_flag & RX_FLAG_HT) {
 477                 rinfo->flags |= RATE_INFO_FLAGS_MCS;
 478                 rinfo->mcs = sta->last_rx_rate_idx;
 479         } else if (sta->last_rx_rate_flag & RX_FLAG_VHT) {
 480                 rinfo->flags |= RATE_INFO_FLAGS_VHT_MCS;
 481                 rinfo->nss = sta->last_rx_rate_vht_nss;
 482                 rinfo->mcs = sta->last_rx_rate_idx;
 483         } else {
 484                 struct ieee80211_supported_band *sband;
 485                 int shift = ieee80211_vif_get_shift(&sta->sdata->vif);
 486                 u16 brate;
 487
 488                 sband = sta->local->hw.wiphy->bands[
 489                                 ieee80211_get_sdata_band(sta->sdata)];
 490                 brate = sband->bitrates[sta->last_rx_rate_idx].bitrate;
 491                 rinfo->legacy = DIV_ROUND_UP(brate, 1 << shift);
 492         }
 493
 494         if (sta->last_rx_rate_flag & RX_FLAG_SHORT_GI)
 495                 rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI;
 496
 497         if (sta->last_rx_rate_flag & RX_FLAG_5MHZ)
 498                 rinfo->bw = RATE_INFO_BW_5;
 499         else if (sta->last_rx_rate_flag & RX_FLAG_10MHZ)
 500                 rinfo->bw = RATE_INFO_BW_10;
 501         else if (sta->last_rx_rate_flag & RX_FLAG_40MHZ)
 502                 rinfo->bw = RATE_INFO_BW_40;
 503         else if (sta->last_rx_rate_vht_flag & RX_VHT_FLAG_80MHZ)
 504                 rinfo->bw = RATE_INFO_BW_80;
 505         else if (sta->last_rx_rate_vht_flag & RX_VHT_FLAG_160MHZ)
 506                 rinfo->bw = RATE_INFO_BW_160;
 507         else
 508                 rinfo->bw = RATE_INFO_BW_20;
 509 }
 510
 511 static int ieee80211_dump_station(struct wiphy *wiphy, struct net_device *dev,
 512                                   int idx, u8 *mac, struct station_info *sinfo)
 513 {
 514         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 515         struct ieee80211_local *local = sdata->local;
 516         struct sta_info *sta;
 517         int ret = -ENOENT;
 518
 519         mutex_lock(&local->sta_mtx);
 520
 521         sta = sta_info_get_by_idx(sdata, idx);
 522         if (sta) {
 523                 ret = 0;
 524                 memcpy(mac, sta->sta.addr, ETH_ALEN);
 525                 sta_set_sinfo(sta, sinfo);
 526         }
 527
 528         mutex_unlock(&local->sta_mtx);
 529
 530         return ret;
 531 }
 532
 533 static int ieee80211_dump_survey(struct wiphy *wiphy, struct net_device *dev,
 534                                  int idx, struct survey_info *survey)
 535 {
 536         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 537
 538         return drv_get_survey(local, idx, survey);
 539 }
 540
 541 static int ieee80211_get_station(struct wiphy *wiphy, struct net_device *dev,
 542                                  const u8 *mac, struct station_info *sinfo)
 543 {
 544         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 545         struct ieee80211_local *local = sdata->local;
 546         struct sta_info *sta;
 547         int ret = -ENOENT;
 548
 549         mutex_lock(&local->sta_mtx);
 550
 551         sta = sta_info_get_bss(sdata, mac);
 552         if (sta) {
 553                 ret = 0;
 554                 sta_set_sinfo(sta, sinfo);
 555         }
 556
 557         mutex_unlock(&local->sta_mtx);
 558
 559         return ret;
 560 }
 561
 562 static int ieee80211_set_monitor_channel(struct wiphy *wiphy,
 563                                          struct cfg80211_chan_def *chandef)
 564 {
 565         struct ieee80211_local *local = wiphy_priv(wiphy);
 566         struct ieee80211_sub_if_data *sdata;
 567         int ret = 0;
 568
 569         if (cfg80211_chandef_identical(&local->monitor_chandef, chandef))
 570                 return 0;
 571
 572         mutex_lock(&local->mtx);
 573         mutex_lock(&local->iflist_mtx);
 574         if (local->use_chanctx) {
 575                 sdata = rcu_dereference_protected(
 576                                 local->monitor_sdata,
 577                                 lockdep_is_held(&local->iflist_mtx));
 578                 if (sdata) {
 579                         ieee80211_vif_release_channel(sdata);
 580                         ret = ieee80211_vif_use_channel(sdata, chandef,
 581                                         IEEE80211_CHANCTX_EXCLUSIVE);
 582                 }
 583         } else if (local->open_count == local->monitors) {
 584                 local->_oper_chandef = *chandef;
 585                 ieee80211_hw_config(local, 0);
 586         }
 587
 588         if (ret == 0)
 589                 local->monitor_chandef = *chandef;
 590         mutex_unlock(&local->iflist_mtx);
 591         mutex_unlock(&local->mtx);
 592
 593         return ret;
 594 }
 595
 596 static int ieee80211_set_probe_resp(struct ieee80211_sub_if_data *sdata,
 597                                     const u8 *resp, size_t resp_len,
 598                                     const struct ieee80211_csa_settings *csa)
 599 {
 600         struct probe_resp *new, *old;
 601
 602         if (!resp || !resp_len)
 603                 return 1;
 604
 605         old = sdata_dereference(sdata->u.ap.probe_resp, sdata);
 606
 607         new = kzalloc(sizeof(struct probe_resp) + resp_len, GFP_KERNEL);
 608         if (!new)
 609                 return -ENOMEM;
 610
 611         new->len = resp_len;
 612         memcpy(new->data, resp, resp_len);
 613
 614         if (csa)
 615                 memcpy(new->csa_counter_offsets, csa->counter_offsets_presp,
 616                        csa->n_counter_offsets_presp *
 617                        sizeof(new->csa_counter_offsets[0]));
 618
 619         rcu_assign_pointer(sdata->u.ap.probe_resp, new);
 620         if (old)
 621                 kfree_rcu(old, rcu_head);
 622
 623         return 0;
 624 }
 625
 626 static int ieee80211_assign_beacon(struct ieee80211_sub_if_data *sdata,
 627                                    struct cfg80211_beacon_data *params,
 628                                    const struct ieee80211_csa_settings *csa)
 629 {
 630         struct beacon_data *new, *old;
 631         int new_head_len, new_tail_len;
 632         int size, err;
 633         u32 changed = BSS_CHANGED_BEACON;
 634
 635         old = sdata_dereference(sdata->u.ap.beacon, sdata);
 636
 637
 638         /* Need to have a beacon head if we don't have one yet */
 639         if (!params->head && !old)
 640                 return -EINVAL;
 641
 642         /* new or old head? */
 643         if (params->head)
 644                 new_head_len = params->head_len;
 645         else
 646                 new_head_len = old->head_len;
 647
 648         /* new or old tail? */
 649         if (params->tail || !old)
 650                 /* params->tail_len will be zero for !params->tail */
 651                 new_tail_len = params->tail_len;
 652         else
 653                 new_tail_len = old->tail_len;
 654
 655         size = sizeof(*new) + new_head_len + new_tail_len;
 656
 657         new = kzalloc(size, GFP_KERNEL);
 658         if (!new)
 659                 return -ENOMEM;
 660
 661         /* start filling the new info now */
 662
 663         /*
 664          * pointers go into the block we allocated,
 665          * memory is | beacon_data | head | tail |
 666          */
 667         new->head = ((u8 *) new) + sizeof(*new);
 668         new->tail = new->head + new_head_len;
 669         new->head_len = new_head_len;
 670         new->tail_len = new_tail_len;
 671
 672         if (csa) {
 673                 new->csa_current_counter = csa->count;
 674                 memcpy(new->csa_counter_offsets, csa->counter_offsets_beacon,
 675                        csa->n_counter_offsets_beacon *
 676                        sizeof(new->csa_counter_offsets[0]));
 677         }
 678
 679         /* copy in head */
 680         if (params->head)
 681                 memcpy(new->head, params->head, new_head_len);
 682         else
 683                 memcpy(new->head, old->head, new_head_len);
 684
 685         /* copy in optional tail */
 686         if (params->tail)
 687                 memcpy(new->tail, params->tail, new_tail_len);
 688         else
 689                 if (old)
 690                         memcpy(new->tail, old->tail, new_tail_len);
 691
 692         err = ieee80211_set_probe_resp(sdata, params->probe_resp,
 693                                        params->probe_resp_len, csa);
 694         if (err < 0)
 695                 return err;
 696         if (err == 0)
 697                 changed |= BSS_CHANGED_AP_PROBE_RESP;
 698
 699         rcu_assign_pointer(sdata->u.ap.beacon, new);
 700
 701         if (old)
 702                 kfree_rcu(old, rcu_head);
 703
 704         return changed;
 705 }
 706
 707 static int ieee80211_start_ap(struct wiphy *wiphy, struct net_device *dev,
 708                               struct cfg80211_ap_settings *params)
 709 {
 710         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 711         struct ieee80211_local *local = sdata->local;
 712         struct beacon_data *old;
 713         struct ieee80211_sub_if_data *vlan;
 714         u32 changed = BSS_CHANGED_BEACON_INT |
 715                       BSS_CHANGED_BEACON_ENABLED |
 716                       BSS_CHANGED_BEACON |
 717                       BSS_CHANGED_SSID |
 718                       BSS_CHANGED_P2P_PS |
 719                       BSS_CHANGED_TXPOWER;
 720         int err;
 721
 722         old = sdata_dereference(sdata->u.ap.beacon, sdata);
 723         if (old)
 724                 return -EALREADY;
 725
 726         switch (params->smps_mode) {
 727         case NL80211_SMPS_OFF:
 728                 sdata->smps_mode = IEEE80211_SMPS_OFF;
 729                 break;
 730         case NL80211_SMPS_STATIC:
 731                 sdata->smps_mode = IEEE80211_SMPS_STATIC;
 732                 break;
 733         case NL80211_SMPS_DYNAMIC:
 734                 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
 735                 break;
 736         default:
 737                 return -EINVAL;
 738         }
 739         sdata->needed_rx_chains = sdata->local->rx_chains;
 740
 741         mutex_lock(&local->mtx);
 742         err = ieee80211_vif_use_channel(sdata, &params->chandef,
 743                                         IEEE80211_CHANCTX_SHARED);
 744         if (!err)
 745                 ieee80211_vif_copy_chanctx_to_vlans(sdata, false);
 746         mutex_unlock(&local->mtx);
 747         if (err)
 748                 return err;
 749
 750         /*
 751          * Apply control port protocol, this allows us to
 752          * not encrypt dynamic WEP control frames.
 753          */
 754         sdata->control_port_protocol = params->crypto.control_port_ethertype;
 755         sdata->control_port_no_encrypt = params->crypto.control_port_no_encrypt;
 756         sdata->encrypt_headroom = ieee80211_cs_headroom(sdata->local,
 757                                                         &params->crypto,
 758                                                         sdata->vif.type);
 759
 760         list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list) {
 761                 vlan->control_port_protocol =
 762                         params->crypto.control_port_ethertype;
 763                 vlan->control_port_no_encrypt =
 764                         params->crypto.control_port_no_encrypt;
 765                 vlan->encrypt_headroom =
 766                         ieee80211_cs_headroom(sdata->local,
 767                                               &params->crypto,
 768                                               vlan->vif.type);
 769         }
 770
 771         sdata->vif.bss_conf.beacon_int = params->beacon_interval;
 772         sdata->vif.bss_conf.dtim_period = params->dtim_period;
 773         sdata->vif.bss_conf.enable_beacon = true;
 774
 775         sdata->vif.bss_conf.ssid_len = params->ssid_len;
 776         if (params->ssid_len)
 777                 memcpy(sdata->vif.bss_conf.ssid, params->ssid,
 778                        params->ssid_len);
 779         sdata->vif.bss_conf.hidden_ssid =
 780                 (params->hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE);
 781
 782         memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
 783                sizeof(sdata->vif.bss_conf.p2p_noa_attr));
 784         sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow =
 785                 params->p2p_ctwindow & IEEE80211_P2P_OPPPS_CTWINDOW_MASK;
 786         if (params->p2p_opp_ps)
 787                 sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow |=
 788                                         IEEE80211_P2P_OPPPS_ENABLE_BIT;
 789
 790         err = ieee80211_assign_beacon(sdata, &params->beacon, NULL);
 791         if (err < 0) {
 792                 ieee80211_vif_release_channel(sdata);
 793                 return err;
 794         }
 795         changed |= err;
 796
 797         err = drv_start_ap(sdata->local, sdata);
 798         if (err) {
 799                 old = sdata_dereference(sdata->u.ap.beacon, sdata);
 800
 801                 if (old)
 802                         kfree_rcu(old, rcu_head);
 803                 RCU_INIT_POINTER(sdata->u.ap.beacon, NULL);
 804                 ieee80211_vif_release_channel(sdata);
 805                 return err;
 806         }
 807
 808         ieee80211_recalc_dtim(local, sdata);
 809         ieee80211_bss_info_change_notify(sdata, changed);
 810
 811         netif_carrier_on(dev);
 812         list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list)
 813                 netif_carrier_on(vlan->dev);
 814
 815         return 0;
 816 }
 817
 818 static int ieee80211_change_beacon(struct wiphy *wiphy, struct net_device *dev,
 819                                    struct cfg80211_beacon_data *params)
 820 {
 821         struct ieee80211_sub_if_data *sdata;
 822         struct beacon_data *old;
 823         int err;
 824
 825         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 826         sdata_assert_lock(sdata);
 827
 828         /* don't allow changing the beacon while CSA is in place - offset
 829          * of channel switch counter may change
 830          */
 831         if (sdata->vif.csa_active)
 832                 return -EBUSY;
 833
 834         old = sdata_dereference(sdata->u.ap.beacon, sdata);
 835         if (!old)
 836                 return -ENOENT;
 837
 838         err = ieee80211_assign_beacon(sdata, params, NULL);
 839         if (err < 0)
 840                 return err;
 841         ieee80211_bss_info_change_notify(sdata, err);
 842         return 0;
 843 }
 844
 845 static int ieee80211_stop_ap(struct wiphy *wiphy, struct net_device *dev)
 846 {
 847         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 848         struct ieee80211_sub_if_data *vlan;
 849         struct ieee80211_local *local = sdata->local;
 850         struct beacon_data *old_beacon;
 851         struct probe_resp *old_probe_resp;
 852         struct cfg80211_chan_def chandef;
 853
 854         sdata_assert_lock(sdata);
 855
 856         old_beacon = sdata_dereference(sdata->u.ap.beacon, sdata);
 857         if (!old_beacon)
 858                 return -ENOENT;
 859         old_probe_resp = sdata_dereference(sdata->u.ap.probe_resp, sdata);
 860
 861         /* abort any running channel switch */
 862         mutex_lock(&local->mtx);
 863         sdata->vif.csa_active = false;
 864         if (sdata->csa_block_tx) {
 865                 ieee80211_wake_vif_queues(local, sdata,
 866                                           IEEE80211_QUEUE_STOP_REASON_CSA);
 867                 sdata->csa_block_tx = false;
 868         }
 869
 870         mutex_unlock(&local->mtx);
 871
 872         kfree(sdata->u.ap.next_beacon);
 873         sdata->u.ap.next_beacon = NULL;
 874
 875         /* turn off carrier for this interface and dependent VLANs */
 876         list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list)
 877                 netif_carrier_off(vlan->dev);
 878         netif_carrier_off(dev);
 879
 880         /* remove beacon and probe response */
 881         RCU_INIT_POINTER(sdata->u.ap.beacon, NULL);
 882         RCU_INIT_POINTER(sdata->u.ap.probe_resp, NULL);
 883         kfree_rcu(old_beacon, rcu_head);
 884         if (old_probe_resp)
 885                 kfree_rcu(old_probe_resp, rcu_head);
 886         sdata->u.ap.driver_smps_mode = IEEE80211_SMPS_OFF;
 887
 888         __sta_info_flush(sdata, true);
 889         ieee80211_free_keys(sdata, true);
 890
 891         sdata->vif.bss_conf.enable_beacon = false;
 892         sdata->vif.bss_conf.ssid_len = 0;
 893         clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state);
 894         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED);
 895
 896         if (sdata->wdev.cac_started) {
 897                 chandef = sdata->vif.bss_conf.chandef;
 898                 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
 899                 cfg80211_cac_event(sdata->dev, &chandef,
 900                                    NL80211_RADAR_CAC_ABORTED,
 901                                    GFP_KERNEL);
 902         }
 903
 904         drv_stop_ap(sdata->local, sdata);
 905
 906         /* free all potentially still buffered bcast frames */
 907         local->total_ps_buffered -= skb_queue_len(&sdata->u.ap.ps.bc_buf);
 908         skb_queue_purge(&sdata->u.ap.ps.bc_buf);
 909
 910         mutex_lock(&local->mtx);
 911         ieee80211_vif_copy_chanctx_to_vlans(sdata, true);
 912         ieee80211_vif_release_channel(sdata);
 913         mutex_unlock(&local->mtx);
 914
 915         return 0;
 916 }
 917
 918 /* Layer 2 Update frame (802.2 Type 1 LLC XID Update response) */
 919 struct iapp_layer2_update {
 920         u8 da[ETH_ALEN];        /* broadcast */
 921         u8 sa[ETH_ALEN];        /* STA addr */
 922         __be16 len;             /* 6 */
 923         u8 dsap;                /* 0 */
 924         u8 ssap;                /* 0 */
 925         u8 control;
 926         u8 xid_info[3];
 927 } __packed;
 928
 929 static void ieee80211_send_layer2_update(struct sta_info *sta)
 930 {
 931         struct iapp_layer2_update *msg;
 932         struct sk_buff *skb;
 933
 934         /* Send Level 2 Update Frame to update forwarding tables in layer 2
 935          * bridge devices */
 936
 937         skb = dev_alloc_skb(sizeof(*msg));
 938         if (!skb)
 939                 return;
 940         msg = (struct iapp_layer2_update *)skb_put(skb, sizeof(*msg));
 941
 942         /* 802.2 Type 1 Logical Link Control (LLC) Exchange Identifier (XID)
 943          * Update response frame; IEEE Std 802.2-1998, 5.4.1.2.1 */
 944
 945         eth_broadcast_addr(msg->da);
 946         memcpy(msg->sa, sta->sta.addr, ETH_ALEN);
 947         msg->len = htons(6);
 948         msg->dsap = 0;
 949         msg->ssap = 0x01;       /* NULL LSAP, CR Bit: Response */
 950         msg->control = 0xaf;    /* XID response lsb.1111F101.
 951                                  * F=0 (no poll command; unsolicited frame) */
 952         msg->xid_info[0] = 0x81;        /* XID format identifier */
 953         msg->xid_info[1] = 1;   /* LLC types/classes: Type 1 LLC */
 954         msg->xid_info[2] = 0;   /* XID sender's receive window size (RW) */
 955
 956         skb->dev = sta->sdata->dev;
 957         skb->protocol = eth_type_trans(skb, sta->sdata->dev);
 958         memset(skb->cb, 0, sizeof(skb->cb));
 959         netif_rx_ni(skb);
 960 }
 961
 962 static int sta_apply_auth_flags(struct ieee80211_local *local,
 963                                 struct sta_info *sta,
 964                                 u32 mask, u32 set)
 965 {
 966         int ret;
 967
 968         if (mask & BIT(NL80211_STA_FLAG_AUTHENTICATED) &&
 969             set & BIT(NL80211_STA_FLAG_AUTHENTICATED) &&
 970             !test_sta_flag(sta, WLAN_STA_AUTH)) {
 971                 ret = sta_info_move_state(sta, IEEE80211_STA_AUTH);
 972                 if (ret)
 973                         return ret;
 974         }
 975
 976         if (mask & BIT(NL80211_STA_FLAG_ASSOCIATED) &&
 977             set & BIT(NL80211_STA_FLAG_ASSOCIATED) &&
 978             !test_sta_flag(sta, WLAN_STA_ASSOC)) {
 979                 /*
 980                  * When peer becomes associated, init rate control as
 981                  * well. Some drivers require rate control initialized
 982                  * before drv_sta_state() is called.
 983                  */
 984                 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER))
 985                         rate_control_rate_init(sta);
 986
 987                 ret = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
 988                 if (ret)
 989                         return ret;
 990         }
 991
 992         if (mask & BIT(NL80211_STA_FLAG_AUTHORIZED)) {
 993                 if (set & BIT(NL80211_STA_FLAG_AUTHORIZED))
 994                         ret = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
 995                 else if (test_sta_flag(sta, WLAN_STA_AUTHORIZED))
 996                         ret = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
 997                 else
 998                         ret = 0;
 999                 if (ret)
1000                         return ret;
1001         }
1002
1003         if (mask & BIT(NL80211_STA_FLAG_ASSOCIATED) &&
1004             !(set & BIT(NL80211_STA_FLAG_ASSOCIATED)) &&
1005             test_sta_flag(sta, WLAN_STA_ASSOC)) {
1006                 ret = sta_info_move_state(sta, IEEE80211_STA_AUTH);
1007                 if (ret)
1008                         return ret;
1009         }
1010
1011         if (mask & BIT(NL80211_STA_FLAG_AUTHENTICATED) &&
1012             !(set & BIT(NL80211_STA_FLAG_AUTHENTICATED)) &&
1013             test_sta_flag(sta, WLAN_STA_AUTH)) {
1014                 ret = sta_info_move_state(sta, IEEE80211_STA_NONE);
1015                 if (ret)
1016                         return ret;
1017         }
1018
1019         return 0;
1020 }
1021
1022 static 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 stations */
1124         if (!test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
1125                 ret = sta_apply_auth_flags(local, sta, mask, set);
1126                 if (ret)
1127                         return ret;
1128         }
1129
1130         if (mask & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE)) {
1131                 if (set & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE))
1132                         set_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE);
1133                 else
1134                         clear_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE);
1135         }
1136
1137         if (mask & BIT(NL80211_STA_FLAG_MFP)) {
1138                 if (set & BIT(NL80211_STA_FLAG_MFP))
1139                         set_sta_flag(sta, WLAN_STA_MFP);
1140                 else
1141                         clear_sta_flag(sta, WLAN_STA_MFP);
1142         }
1143
1144         if (mask & BIT(NL80211_STA_FLAG_TDLS_PEER)) {
1145                 if (set & BIT(NL80211_STA_FLAG_TDLS_PEER))
1146                         set_sta_flag(sta, WLAN_STA_TDLS_PEER);
1147                 else
1148                         clear_sta_flag(sta, WLAN_STA_TDLS_PEER);
1149         }
1150
1151         /* mark TDLS channel switch support, if the AP allows it */
1152         if (test_sta_flag(sta, WLAN_STA_TDLS_PEER) &&
1153             !sdata->u.mgd.tdls_chan_switch_prohibited &&
1154             params->ext_capab_len >= 4 &&
1155             params->ext_capab[3] & WLAN_EXT_CAPA4_TDLS_CHAN_SWITCH)
1156                 set_sta_flag(sta, WLAN_STA_TDLS_CHAN_SWITCH);
1157
1158         if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD) {
1159                 sta->sta.uapsd_queues = params->uapsd_queues;
1160                 sta->sta.max_sp = params->max_sp;
1161         }
1162
1163         /*
1164          * cfg80211 validates this (1-2007) and allows setting the AID
1165          * only when creating a new station entry
1166          */
1167         if (params->aid)
1168                 sta->sta.aid = params->aid;
1169
1170         /*
1171          * Some of the following updates would be racy if called on an
1172          * existing station, via ieee80211_change_station(). However,
1173          * all such changes are rejected by cfg80211 except for updates
1174          * changing the supported rates on an existing but not yet used
1175          * TDLS peer.
1176          */
1177
1178         if (params->listen_interval >= 0)
1179                 sta->listen_interval = params->listen_interval;
1180
1181         if (params->supported_rates) {
1182                 ieee80211_parse_bitrates(&sdata->vif.bss_conf.chandef,
1183                                          sband, params->supported_rates,
1184                                          params->supported_rates_len,
1185                                          &sta->sta.supp_rates[band]);
1186         }
1187
1188         if (params->ht_capa)
1189                 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
1190                                                   params->ht_capa, sta);
1191
1192         if (params->vht_capa)
1193                 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
1194                                                     params->vht_capa, sta);
1195
1196         if (params->opmode_notif_used) {
1197                 /* returned value is only needed for rc update, but the
1198                  * rc isn't initialized here yet, so ignore it
1199                  */
1200                 __ieee80211_vht_handle_opmode(sdata, sta,
1201                                               params->opmode_notif,
1202                                               band, false);
1203         }
1204
1205         if (ieee80211_vif_is_mesh(&sdata->vif))
1206                 sta_apply_mesh_params(local, sta, params);
1207
1208         /* set the STA state after all sta info from usermode has been set */
1209         if (test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
1210                 ret = sta_apply_auth_flags(local, sta, mask, set);
1211                 if (ret)
1212                         return ret;
1213         }
1214
1215         return 0;
1216 }
1217
1218 static int ieee80211_add_station(struct wiphy *wiphy, struct net_device *dev,
1219                                  const u8 *mac,
1220                                  struct station_parameters *params)
1221 {
1222         struct ieee80211_local *local = wiphy_priv(wiphy);
1223         struct sta_info *sta;
1224         struct ieee80211_sub_if_data *sdata;
1225         int err;
1226         int layer2_update;
1227
1228         if (params->vlan) {
1229                 sdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
1230
1231                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1232                     sdata->vif.type != NL80211_IFTYPE_AP)
1233                         return -EINVAL;
1234         } else
1235                 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1236
1237         if (ether_addr_equal(mac, sdata->vif.addr))
1238                 return -EINVAL;
1239
1240         if (is_multicast_ether_addr(mac))
1241                 return -EINVAL;
1242
1243         sta = sta_info_alloc(sdata, mac, GFP_KERNEL);
1244         if (!sta)
1245                 return -ENOMEM;
1246
1247         /*
1248          * defaults -- if userspace wants something else we'll
1249          * change it accordingly in sta_apply_parameters()
1250          */
1251         if (!(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))) {
1252                 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
1253                 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
1254         } else {
1255                 sta->sta.tdls = true;
1256         }
1257
1258         err = sta_apply_parameters(local, sta, params);
1259         if (err) {
1260                 sta_info_free(local, sta);
1261                 return err;
1262         }
1263
1264         /*
1265          * for TDLS, rate control should be initialized only when
1266          * rates are known and station is marked authorized
1267          */
1268         if (!test_sta_flag(sta, WLAN_STA_TDLS_PEER))
1269                 rate_control_rate_init(sta);
1270
1271         layer2_update = sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1272                 sdata->vif.type == NL80211_IFTYPE_AP;
1273
1274         err = sta_info_insert_rcu(sta);
1275         if (err) {
1276                 rcu_read_unlock();
1277                 return err;
1278         }
1279
1280         if (layer2_update)
1281                 ieee80211_send_layer2_update(sta);
1282
1283         rcu_read_unlock();
1284
1285         return 0;
1286 }
1287
1288 static int ieee80211_del_station(struct wiphy *wiphy, struct net_device *dev,
1289                                  struct station_del_parameters *params)
1290 {
1291         struct ieee80211_sub_if_data *sdata;
1292
1293         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1294
1295         if (params->mac)
1296                 return sta_info_destroy_addr_bss(sdata, params->mac);
1297
1298         sta_info_flush(sdata);
1299         return 0;
1300 }
1301
1302 static int ieee80211_change_station(struct wiphy *wiphy,
1303                                     struct net_device *dev, const u8 *mac,
1304                                     struct station_parameters *params)
1305 {
1306         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1307         struct ieee80211_local *local = wiphy_priv(wiphy);
1308         struct sta_info *sta;
1309         struct ieee80211_sub_if_data *vlansdata;
1310         enum cfg80211_station_type statype;
1311         int err;
1312
1313         mutex_lock(&local->sta_mtx);
1314
1315         sta = sta_info_get_bss(sdata, mac);
1316         if (!sta) {
1317                 err = -ENOENT;
1318                 goto out_err;
1319         }
1320
1321         switch (sdata->vif.type) {
1322         case NL80211_IFTYPE_MESH_POINT:
1323                 if (sdata->u.mesh.user_mpm)
1324                         statype = CFG80211_STA_MESH_PEER_USER;
1325                 else
1326                         statype = CFG80211_STA_MESH_PEER_KERNEL;
1327                 break;
1328         case NL80211_IFTYPE_ADHOC:
1329                 statype = CFG80211_STA_IBSS;
1330                 break;
1331         case NL80211_IFTYPE_STATION:
1332                 if (!test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
1333                         statype = CFG80211_STA_AP_STA;
1334                         break;
1335                 }
1336                 if (test_sta_flag(sta, WLAN_STA_AUTHORIZED))
1337                         statype = CFG80211_STA_TDLS_PEER_ACTIVE;
1338                 else
1339                         statype = CFG80211_STA_TDLS_PEER_SETUP;
1340                 break;
1341         case NL80211_IFTYPE_AP:
1342         case NL80211_IFTYPE_AP_VLAN:
1343                 statype = CFG80211_STA_AP_CLIENT;
1344                 break;
1345         default:
1346                 err = -EOPNOTSUPP;
1347                 goto out_err;
1348         }
1349
1350         err = cfg80211_check_station_change(wiphy, params, statype);
1351         if (err)
1352                 goto out_err;
1353
1354         if (params->vlan && params->vlan != sta->sdata->dev) {
1355                 bool prev_4addr = false;
1356                 bool new_4addr = false;
1357
1358                 vlansdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
1359
1360                 if (params->vlan->ieee80211_ptr->use_4addr) {
1361                         if (vlansdata->u.vlan.sta) {
1362                                 err = -EBUSY;
1363                                 goto out_err;
1364                         }
1365
1366                         rcu_assign_pointer(vlansdata->u.vlan.sta, sta);
1367                         new_4addr = true;
1368                 }
1369
1370                 if (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
1371                     sta->sdata->u.vlan.sta) {
1372                         RCU_INIT_POINTER(sta->sdata->u.vlan.sta, NULL);
1373                         prev_4addr = true;
1374                 }
1375
1376                 sta->sdata = vlansdata;
1377                 ieee80211_check_fast_xmit(sta);
1378
1379                 if (sta->sta_state == IEEE80211_STA_AUTHORIZED &&
1380                     prev_4addr != new_4addr) {
1381                         if (new_4addr)
1382                                 atomic_dec(&sta->sdata->bss->num_mcast_sta);
1383                         else
1384                                 atomic_inc(&sta->sdata->bss->num_mcast_sta);
1385                 }
1386
1387                 ieee80211_send_layer2_update(sta);
1388         }
1389
1390         err = sta_apply_parameters(local, sta, params);
1391         if (err)
1392                 goto out_err;
1393
1394         mutex_unlock(&local->sta_mtx);
1395
1396         if ((sdata->vif.type == NL80211_IFTYPE_AP ||
1397              sdata->vif.type == NL80211_IFTYPE_AP_VLAN) &&
1398             sta->known_smps_mode != sta->sdata->bss->req_smps &&
1399             test_sta_flag(sta, WLAN_STA_AUTHORIZED) &&
1400             sta_info_tx_streams(sta) != 1) {
1401                 ht_dbg(sta->sdata,
1402                        "%pM just authorized and MIMO capable - update SMPS\n",
1403                        sta->sta.addr);
1404                 ieee80211_send_smps_action(sta->sdata,
1405                         sta->sdata->bss->req_smps,
1406                         sta->sta.addr,
1407                         sta->sdata->vif.bss_conf.bssid);
1408         }
1409
1410         if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1411             params->sta_flags_mask & BIT(NL80211_STA_FLAG_AUTHORIZED)) {
1412                 ieee80211_recalc_ps(local, -1);
1413                 ieee80211_recalc_ps_vif(sdata);
1414         }
1415
1416         return 0;
1417 out_err:
1418         mutex_unlock(&local->sta_mtx);
1419         return err;
1420 }
1421
1422 #ifdef CONFIG_MAC80211_MESH
1423 static int ieee80211_add_mpath(struct wiphy *wiphy, struct net_device *dev,
1424                                const u8 *dst, const u8 *next_hop)
1425 {
1426         struct ieee80211_sub_if_data *sdata;
1427         struct mesh_path *mpath;
1428         struct sta_info *sta;
1429
1430         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1431
1432         rcu_read_lock();
1433         sta = sta_info_get(sdata, next_hop);
1434         if (!sta) {
1435                 rcu_read_unlock();
1436                 return -ENOENT;
1437         }
1438
1439         mpath = mesh_path_add(sdata, dst);
1440         if (IS_ERR(mpath)) {
1441                 rcu_read_unlock();
1442                 return PTR_ERR(mpath);
1443         }
1444
1445         mesh_path_fix_nexthop(mpath, sta);
1446
1447         rcu_read_unlock();
1448         return 0;
1449 }
1450
1451 static int ieee80211_del_mpath(struct wiphy *wiphy, struct net_device *dev,
1452                                const u8 *dst)
1453 {
1454         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1455
1456         if (dst)
1457                 return mesh_path_del(sdata, dst);
1458
1459         mesh_path_flush_by_iface(sdata);
1460         return 0;
1461 }
1462
1463 static int ieee80211_change_mpath(struct wiphy *wiphy, struct net_device *dev,
1464                                   const u8 *dst, const u8 *next_hop)
1465 {
1466         struct ieee80211_sub_if_data *sdata;
1467         struct mesh_path *mpath;
1468         struct sta_info *sta;
1469
1470         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1471
1472         rcu_read_lock();
1473
1474         sta = sta_info_get(sdata, next_hop);
1475         if (!sta) {
1476                 rcu_read_unlock();
1477                 return -ENOENT;
1478         }
1479
1480         mpath = mesh_path_lookup(sdata, dst);
1481         if (!mpath) {
1482                 rcu_read_unlock();
1483                 return -ENOENT;
1484         }
1485
1486         mesh_path_fix_nexthop(mpath, sta);
1487
1488         rcu_read_unlock();
1489         return 0;
1490 }
1491
1492 static void mpath_set_pinfo(struct mesh_path *mpath, u8 *next_hop,
1493                             struct mpath_info *pinfo)
1494 {
1495         struct sta_info *next_hop_sta = rcu_dereference(mpath->next_hop);
1496
1497         if (next_hop_sta)
1498                 memcpy(next_hop, next_hop_sta->sta.addr, ETH_ALEN);
1499         else
1500                 eth_zero_addr(next_hop);
1501
1502         memset(pinfo, 0, sizeof(*pinfo));
1503
1504         pinfo->generation = mesh_paths_generation;
1505
1506         pinfo->filled = MPATH_INFO_FRAME_QLEN |
1507                         MPATH_INFO_SN |
1508                         MPATH_INFO_METRIC |
1509                         MPATH_INFO_EXPTIME |
1510                         MPATH_INFO_DISCOVERY_TIMEOUT |
1511                         MPATH_INFO_DISCOVERY_RETRIES |
1512                         MPATH_INFO_FLAGS;
1513
1514         pinfo->frame_qlen = mpath->frame_queue.qlen;
1515         pinfo->sn = mpath->sn;
1516         pinfo->metric = mpath->metric;
1517         if (time_before(jiffies, mpath->exp_time))
1518                 pinfo->exptime = jiffies_to_msecs(mpath->exp_time - jiffies);
1519         pinfo->discovery_timeout =
1520                         jiffies_to_msecs(mpath->discovery_timeout);
1521         pinfo->discovery_retries = mpath->discovery_retries;
1522         if (mpath->flags & MESH_PATH_ACTIVE)
1523                 pinfo->flags |= NL80211_MPATH_FLAG_ACTIVE;
1524         if (mpath->flags & MESH_PATH_RESOLVING)
1525                 pinfo->flags |= NL80211_MPATH_FLAG_RESOLVING;
1526         if (mpath->flags & MESH_PATH_SN_VALID)
1527                 pinfo->flags |= NL80211_MPATH_FLAG_SN_VALID;
1528         if (mpath->flags & MESH_PATH_FIXED)
1529                 pinfo->flags |= NL80211_MPATH_FLAG_FIXED;
1530         if (mpath->flags & MESH_PATH_RESOLVED)
1531                 pinfo->flags |= NL80211_MPATH_FLAG_RESOLVED;
1532 }
1533
1534 static int ieee80211_get_mpath(struct wiphy *wiphy, struct net_device *dev,
1535                                u8 *dst, u8 *next_hop, struct mpath_info *pinfo)
1536
1537 {
1538         struct ieee80211_sub_if_data *sdata;
1539         struct mesh_path *mpath;
1540
1541         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1542
1543         rcu_read_lock();
1544         mpath = mesh_path_lookup(sdata, dst);
1545         if (!mpath) {
1546                 rcu_read_unlock();
1547                 return -ENOENT;
1548         }
1549         memcpy(dst, mpath->dst, ETH_ALEN);
1550         mpath_set_pinfo(mpath, next_hop, pinfo);
1551         rcu_read_unlock();
1552         return 0;
1553 }
1554
1555 static int ieee80211_dump_mpath(struct wiphy *wiphy, struct net_device *dev,
1556                                 int idx, u8 *dst, u8 *next_hop,
1557                                 struct mpath_info *pinfo)
1558 {
1559         struct ieee80211_sub_if_data *sdata;
1560         struct mesh_path *mpath;
1561
1562         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1563
1564         rcu_read_lock();
1565         mpath = mesh_path_lookup_by_idx(sdata, idx);
1566         if (!mpath) {
1567                 rcu_read_unlock();
1568                 return -ENOENT;
1569         }
1570         memcpy(dst, mpath->dst, ETH_ALEN);
1571         mpath_set_pinfo(mpath, next_hop, pinfo);
1572         rcu_read_unlock();
1573         return 0;
1574 }
1575
1576 static void mpp_set_pinfo(struct mesh_path *mpath, u8 *mpp,
1577                           struct mpath_info *pinfo)
1578 {
1579         memset(pinfo, 0, sizeof(*pinfo));
1580         memcpy(mpp, mpath->mpp, ETH_ALEN);
1581
1582         pinfo->generation = mpp_paths_generation;
1583 }
1584
1585 static int ieee80211_get_mpp(struct wiphy *wiphy, struct net_device *dev,
1586                              u8 *dst, u8 *mpp, struct mpath_info *pinfo)
1587
1588 {
1589         struct ieee80211_sub_if_data *sdata;
1590         struct mesh_path *mpath;
1591
1592         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1593
1594         rcu_read_lock();
1595         mpath = mpp_path_lookup(sdata, dst);
1596         if (!mpath) {
1597                 rcu_read_unlock();
1598                 return -ENOENT;
1599         }
1600         memcpy(dst, mpath->dst, ETH_ALEN);
1601         mpp_set_pinfo(mpath, mpp, pinfo);
1602         rcu_read_unlock();
1603         return 0;
1604 }
1605
1606 static int ieee80211_dump_mpp(struct wiphy *wiphy, struct net_device *dev,
1607                               int idx, u8 *dst, u8 *mpp,
1608                               struct mpath_info *pinfo)
1609 {
1610         struct ieee80211_sub_if_data *sdata;
1611         struct mesh_path *mpath;
1612
1613         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1614
1615         rcu_read_lock();
1616         mpath = mpp_path_lookup_by_idx(sdata, idx);
1617         if (!mpath) {
1618                 rcu_read_unlock();
1619                 return -ENOENT;
1620         }
1621         memcpy(dst, mpath->dst, ETH_ALEN);
1622         mpp_set_pinfo(mpath, mpp, pinfo);
1623         rcu_read_unlock();
1624         return 0;
1625 }
1626
1627 static int ieee80211_get_mesh_config(struct wiphy *wiphy,
1628                                 struct net_device *dev,
1629                                 struct mesh_config *conf)
1630 {
1631         struct ieee80211_sub_if_data *sdata;
1632         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1633
1634         memcpy(conf, &(sdata->u.mesh.mshcfg), sizeof(struct mesh_config));
1635         return 0;
1636 }
1637
1638 static inline bool _chg_mesh_attr(enum nl80211_meshconf_params parm, u32 mask)
1639 {
1640         return (mask >> (parm-1)) & 0x1;
1641 }
1642
1643 static int copy_mesh_setup(struct ieee80211_if_mesh *ifmsh,
1644                 const struct mesh_setup *setup)
1645 {
1646         u8 *new_ie;
1647         const u8 *old_ie;
1648         struct ieee80211_sub_if_data *sdata = container_of(ifmsh,
1649                                         struct ieee80211_sub_if_data, u.mesh);
1650
1651         /* allocate information elements */
1652         new_ie = NULL;
1653         old_ie = ifmsh->ie;
1654
1655         if (setup->ie_len) {
1656                 new_ie = kmemdup(setup->ie, setup->ie_len,
1657                                 GFP_KERNEL);
1658                 if (!new_ie)
1659                         return -ENOMEM;
1660         }
1661         ifmsh->ie_len = setup->ie_len;
1662         ifmsh->ie = new_ie;
1663         kfree(old_ie);
1664
1665         /* now copy the rest of the setup parameters */
1666         ifmsh->mesh_id_len = setup->mesh_id_len;
1667         memcpy(ifmsh->mesh_id, setup->mesh_id, ifmsh->mesh_id_len);
1668         ifmsh->mesh_sp_id = setup->sync_method;
1669         ifmsh->mesh_pp_id = setup->path_sel_proto;
1670         ifmsh->mesh_pm_id = setup->path_metric;
1671         ifmsh->user_mpm = setup->user_mpm;
1672         ifmsh->mesh_auth_id = setup->auth_id;
1673         ifmsh->security = IEEE80211_MESH_SEC_NONE;
1674         if (setup->is_authenticated)
1675                 ifmsh->security |= IEEE80211_MESH_SEC_AUTHED;
1676         if (setup->is_secure)
1677                 ifmsh->security |= IEEE80211_MESH_SEC_SECURED;
1678
1679         /* mcast rate setting in Mesh Node */
1680         memcpy(sdata->vif.bss_conf.mcast_rate, setup->mcast_rate,
1681                                                 sizeof(setup->mcast_rate));
1682         sdata->vif.bss_conf.basic_rates = setup->basic_rates;
1683
1684         sdata->vif.bss_conf.beacon_int = setup->beacon_interval;
1685         sdata->vif.bss_conf.dtim_period = setup->dtim_period;
1686
1687         return 0;
1688 }
1689
1690 static int ieee80211_update_mesh_config(struct wiphy *wiphy,
1691                                         struct net_device *dev, u32 mask,
1692                                         const struct mesh_config *nconf)
1693 {
1694         struct mesh_config *conf;
1695         struct ieee80211_sub_if_data *sdata;
1696         struct ieee80211_if_mesh *ifmsh;
1697
1698         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1699         ifmsh = &sdata->u.mesh;
1700
1701         /* Set the config options which we are interested in setting */
1702         conf = &(sdata->u.mesh.mshcfg);
1703         if (_chg_mesh_attr(NL80211_MESHCONF_RETRY_TIMEOUT, mask))
1704                 conf->dot11MeshRetryTimeout = nconf->dot11MeshRetryTimeout;
1705         if (_chg_mesh_attr(NL80211_MESHCONF_CONFIRM_TIMEOUT, mask))
1706                 conf->dot11MeshConfirmTimeout = nconf->dot11MeshConfirmTimeout;
1707         if (_chg_mesh_attr(NL80211_MESHCONF_HOLDING_TIMEOUT, mask))
1708                 conf->dot11MeshHoldingTimeout = nconf->dot11MeshHoldingTimeout;
1709         if (_chg_mesh_attr(NL80211_MESHCONF_MAX_PEER_LINKS, mask))
1710                 conf->dot11MeshMaxPeerLinks = nconf->dot11MeshMaxPeerLinks;
1711         if (_chg_mesh_attr(NL80211_MESHCONF_MAX_RETRIES, mask))
1712                 conf->dot11MeshMaxRetries = nconf->dot11MeshMaxRetries;
1713         if (_chg_mesh_attr(NL80211_MESHCONF_TTL, mask))
1714                 conf->dot11MeshTTL = nconf->dot11MeshTTL;
1715         if (_chg_mesh_attr(NL80211_MESHCONF_ELEMENT_TTL, mask))
1716                 conf->element_ttl = nconf->element_ttl;
1717         if (_chg_mesh_attr(NL80211_MESHCONF_AUTO_OPEN_PLINKS, mask)) {
1718                 if (ifmsh->user_mpm)
1719                         return -EBUSY;
1720                 conf->auto_open_plinks = nconf->auto_open_plinks;
1721         }
1722         if (_chg_mesh_attr(NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR, mask))
1723                 conf->dot11MeshNbrOffsetMaxNeighbor =
1724                         nconf->dot11MeshNbrOffsetMaxNeighbor;
1725         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES, mask))
1726                 conf->dot11MeshHWMPmaxPREQretries =
1727                         nconf->dot11MeshHWMPmaxPREQretries;
1728         if (_chg_mesh_attr(NL80211_MESHCONF_PATH_REFRESH_TIME, mask))
1729                 conf->path_refresh_time = nconf->path_refresh_time;
1730         if (_chg_mesh_attr(NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT, mask))
1731                 conf->min_discovery_timeout = nconf->min_discovery_timeout;
1732         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT, mask))
1733                 conf->dot11MeshHWMPactivePathTimeout =
1734                         nconf->dot11MeshHWMPactivePathTimeout;
1735         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL, mask))
1736                 conf->dot11MeshHWMPpreqMinInterval =
1737                         nconf->dot11MeshHWMPpreqMinInterval;
1738         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL, mask))
1739                 conf->dot11MeshHWMPperrMinInterval =
1740                         nconf->dot11MeshHWMPperrMinInterval;
1741         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
1742                            mask))
1743                 conf->dot11MeshHWMPnetDiameterTraversalTime =
1744                         nconf->dot11MeshHWMPnetDiameterTraversalTime;
1745         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_ROOTMODE, mask)) {
1746                 conf->dot11MeshHWMPRootMode = nconf->dot11MeshHWMPRootMode;
1747                 ieee80211_mesh_root_setup(ifmsh);
1748         }
1749         if (_chg_mesh_attr(NL80211_MESHCONF_GATE_ANNOUNCEMENTS, mask)) {
1750                 /* our current gate announcement implementation rides on root
1751                  * announcements, so require this ifmsh to also be a root node
1752                  * */
1753                 if (nconf->dot11MeshGateAnnouncementProtocol &&
1754                     !(conf->dot11MeshHWMPRootMode > IEEE80211_ROOTMODE_ROOT)) {
1755                         conf->dot11MeshHWMPRootMode = IEEE80211_PROACTIVE_RANN;
1756                         ieee80211_mesh_root_setup(ifmsh);
1757                 }
1758                 conf->dot11MeshGateAnnouncementProtocol =
1759                         nconf->dot11MeshGateAnnouncementProtocol;
1760         }
1761         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_RANN_INTERVAL, mask))
1762                 conf->dot11MeshHWMPRannInterval =
1763                         nconf->dot11MeshHWMPRannInterval;
1764         if (_chg_mesh_attr(NL80211_MESHCONF_FORWARDING, mask))
1765                 conf->dot11MeshForwarding = nconf->dot11MeshForwarding;
1766         if (_chg_mesh_attr(NL80211_MESHCONF_RSSI_THRESHOLD, mask)) {
1767                 /* our RSSI threshold implementation is supported only for
1768                  * devices that report signal in dBm.
1769                  */
1770                 if (!ieee80211_hw_check(&sdata->local->hw, SIGNAL_DBM))
1771                         return -ENOTSUPP;
1772                 conf->rssi_threshold = nconf->rssi_threshold;
1773         }
1774         if (_chg_mesh_attr(NL80211_MESHCONF_HT_OPMODE, mask)) {
1775                 conf->ht_opmode = nconf->ht_opmode;
1776                 sdata->vif.bss_conf.ht_operation_mode = nconf->ht_opmode;
1777                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_HT);
1778         }
1779         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT, mask))
1780                 conf->dot11MeshHWMPactivePathToRootTimeout =
1781                         nconf->dot11MeshHWMPactivePathToRootTimeout;
1782         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_ROOT_INTERVAL, mask))
1783                 conf->dot11MeshHWMProotInterval =
1784                         nconf->dot11MeshHWMProotInterval;
1785         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL, mask))
1786                 conf->dot11MeshHWMPconfirmationInterval =
1787                         nconf->dot11MeshHWMPconfirmationInterval;
1788         if (_chg_mesh_attr(NL80211_MESHCONF_POWER_MODE, mask)) {
1789                 conf->power_mode = nconf->power_mode;
1790                 ieee80211_mps_local_status_update(sdata);
1791         }
1792         if (_chg_mesh_attr(NL80211_MESHCONF_AWAKE_WINDOW, mask))
1793                 conf->dot11MeshAwakeWindowDuration =
1794                         nconf->dot11MeshAwakeWindowDuration;
1795         if (_chg_mesh_attr(NL80211_MESHCONF_PLINK_TIMEOUT, mask))
1796                 conf->plink_timeout = nconf->plink_timeout;
1797         ieee80211_mbss_info_change_notify(sdata, BSS_CHANGED_BEACON);
1798         return 0;
1799 }
1800
1801 static int ieee80211_join_mesh(struct wiphy *wiphy, struct net_device *dev,
1802                                const struct mesh_config *conf,
1803                                const struct mesh_setup *setup)
1804 {
1805         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1806         struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1807         int err;
1808
1809         memcpy(&ifmsh->mshcfg, conf, sizeof(struct mesh_config));
1810         err = copy_mesh_setup(ifmsh, setup);
1811         if (err)
1812                 return err;
1813
1814         /* can mesh use other SMPS modes? */
1815         sdata->smps_mode = IEEE80211_SMPS_OFF;
1816         sdata->needed_rx_chains = sdata->local->rx_chains;
1817
1818         mutex_lock(&sdata->local->mtx);
1819         err = ieee80211_vif_use_channel(sdata, &setup->chandef,
1820                                         IEEE80211_CHANCTX_SHARED);
1821         mutex_unlock(&sdata->local->mtx);
1822         if (err)
1823                 return err;
1824
1825         return ieee80211_start_mesh(sdata);
1826 }
1827
1828 static int ieee80211_leave_mesh(struct wiphy *wiphy, struct net_device *dev)
1829 {
1830         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1831
1832         ieee80211_stop_mesh(sdata);
1833         mutex_lock(&sdata->local->mtx);
1834         ieee80211_vif_release_channel(sdata);
1835         mutex_unlock(&sdata->local->mtx);
1836
1837         return 0;
1838 }
1839 #endif
1840
1841 static int ieee80211_change_bss(struct wiphy *wiphy,
1842                                 struct net_device *dev,
1843                                 struct bss_parameters *params)
1844 {
1845         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1846         enum ieee80211_band band;
1847         u32 changed = 0;
1848
1849         if (!sdata_dereference(sdata->u.ap.beacon, sdata))
1850                 return -ENOENT;
1851
1852         band = ieee80211_get_sdata_band(sdata);
1853
1854         if (params->use_cts_prot >= 0) {
1855                 sdata->vif.bss_conf.use_cts_prot = params->use_cts_prot;
1856                 changed |= BSS_CHANGED_ERP_CTS_PROT;
1857         }
1858         if (params->use_short_preamble >= 0) {
1859                 sdata->vif.bss_conf.use_short_preamble =
1860                         params->use_short_preamble;
1861                 changed |= BSS_CHANGED_ERP_PREAMBLE;
1862         }
1863
1864         if (!sdata->vif.bss_conf.use_short_slot &&
1865             band == IEEE80211_BAND_5GHZ) {
1866                 sdata->vif.bss_conf.use_short_slot = true;
1867                 changed |= BSS_CHANGED_ERP_SLOT;
1868         }
1869
1870         if (params->use_short_slot_time >= 0) {
1871                 sdata->vif.bss_conf.use_short_slot =
1872                         params->use_short_slot_time;
1873                 changed |= BSS_CHANGED_ERP_SLOT;
1874         }
1875
1876         if (params->basic_rates) {
1877                 ieee80211_parse_bitrates(&sdata->vif.bss_conf.chandef,
1878                                          wiphy->bands[band],
1879                                          params->basic_rates,
1880                                          params->basic_rates_len,
1881                                          &sdata->vif.bss_conf.basic_rates);
1882                 changed |= BSS_CHANGED_BASIC_RATES;
1883         }
1884
1885         if (params->ap_isolate >= 0) {
1886                 if (params->ap_isolate)
1887                         sdata->flags |= IEEE80211_SDATA_DONT_BRIDGE_PACKETS;
1888                 else
1889                         sdata->flags &= ~IEEE80211_SDATA_DONT_BRIDGE_PACKETS;
1890         }
1891
1892         if (params->ht_opmode >= 0) {
1893                 sdata->vif.bss_conf.ht_operation_mode =
1894                         (u16) params->ht_opmode;
1895                 changed |= BSS_CHANGED_HT;
1896         }
1897
1898         if (params->p2p_ctwindow >= 0) {
1899                 sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow &=
1900                                         ~IEEE80211_P2P_OPPPS_CTWINDOW_MASK;
1901                 sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow |=
1902                         params->p2p_ctwindow & IEEE80211_P2P_OPPPS_CTWINDOW_MASK;
1903                 changed |= BSS_CHANGED_P2P_PS;
1904         }
1905
1906         if (params->p2p_opp_ps > 0) {
1907                 sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow |=
1908                                         IEEE80211_P2P_OPPPS_ENABLE_BIT;
1909                 changed |= BSS_CHANGED_P2P_PS;
1910         } else if (params->p2p_opp_ps == 0) {
1911                 sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow &=
1912                                         ~IEEE80211_P2P_OPPPS_ENABLE_BIT;
1913                 changed |= BSS_CHANGED_P2P_PS;
1914         }
1915
1916         ieee80211_bss_info_change_notify(sdata, changed);
1917
1918         return 0;
1919 }
1920
1921 static int ieee80211_set_txq_params(struct wiphy *wiphy,
1922                                     struct net_device *dev,
1923                                     struct ieee80211_txq_params *params)
1924 {
1925         struct ieee80211_local *local = wiphy_priv(wiphy);
1926         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1927         struct ieee80211_tx_queue_params p;
1928
1929         if (!local->ops->conf_tx)
1930                 return -EOPNOTSUPP;
1931
1932         if (local->hw.queues < IEEE80211_NUM_ACS)
1933                 return -EOPNOTSUPP;
1934
1935         memset(&p, 0, sizeof(p));
1936         p.aifs = params->aifs;
1937         p.cw_max = params->cwmax;
1938         p.cw_min = params->cwmin;
1939         p.txop = params->txop;
1940
1941         /*
1942          * Setting tx queue params disables u-apsd because it's only
1943          * called in master mode.
1944          */
1945         p.uapsd = false;
1946
1947         sdata->tx_conf[params->ac] = p;
1948         if (drv_conf_tx(local, sdata, params->ac, &p)) {
1949                 wiphy_debug(local->hw.wiphy,
1950                             "failed to set TX queue parameters for AC %d\n",
1951                             params->ac);
1952                 return -EINVAL;
1953         }
1954
1955         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1956
1957         return 0;
1958 }
1959
1960 #ifdef CONFIG_PM
1961 static int ieee80211_suspend(struct wiphy *wiphy,
1962                              struct cfg80211_wowlan *wowlan)
1963 {
1964         return __ieee80211_suspend(wiphy_priv(wiphy), wowlan);
1965 }
1966
1967 static int ieee80211_resume(struct wiphy *wiphy)
1968 {
1969         return __ieee80211_resume(wiphy_priv(wiphy));
1970 }
1971 #else
1972 #define ieee80211_suspend NULL
1973 #define ieee80211_resume NULL
1974 #endif
1975
1976 static int ieee80211_scan(struct wiphy *wiphy,
1977                           struct cfg80211_scan_request *req)
1978 {
1979         struct ieee80211_sub_if_data *sdata;
1980
1981         sdata = IEEE80211_WDEV_TO_SUB_IF(req->wdev);
1982
1983         switch (ieee80211_vif_type_p2p(&sdata->vif)) {
1984         case NL80211_IFTYPE_STATION:
1985         case NL80211_IFTYPE_ADHOC:
1986         case NL80211_IFTYPE_MESH_POINT:
1987         case NL80211_IFTYPE_P2P_CLIENT:
1988         case NL80211_IFTYPE_P2P_DEVICE:
1989                 break;
1990         case NL80211_IFTYPE_P2P_GO:
1991                 if (sdata->local->ops->hw_scan)
1992                         break;
1993                 /*
1994                  * FIXME: implement NoA while scanning in software,
1995                  * for now fall through to allow scanning only when
1996                  * beaconing hasn't been configured yet
1997                  */
1998         case NL80211_IFTYPE_AP:
1999                 /*
2000                  * If the scan has been forced (and the driver supports
2001                  * forcing), don't care about being beaconing already.
2002                  * This will create problems to the attached stations (e.g. all
2003                  * the  frames sent while scanning on other channel will be
2004                  * lost)
2005                  */
2006                 if (sdata->u.ap.beacon &&
2007                     (!(wiphy->features & NL80211_FEATURE_AP_SCAN) ||
2008                      !(req->flags & NL80211_SCAN_FLAG_AP)))
2009                         return -EOPNOTSUPP;
2010                 break;
2011         default:
2012                 return -EOPNOTSUPP;
2013         }
2014
2015         return ieee80211_request_scan(sdata, req);
2016 }
2017
2018 static int
2019 ieee80211_sched_scan_start(struct wiphy *wiphy,
2020                            struct net_device *dev,
2021                            struct cfg80211_sched_scan_request *req)
2022 {
2023         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2024
2025         if (!sdata->local->ops->sched_scan_start)
2026                 return -EOPNOTSUPP;
2027
2028         return ieee80211_request_sched_scan_start(sdata, req);
2029 }
2030
2031 static int
2032 ieee80211_sched_scan_stop(struct wiphy *wiphy, struct net_device *dev)
2033 {
2034         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2035
2036         if (!sdata->local->ops->sched_scan_stop)
2037                 return -EOPNOTSUPP;
2038
2039         return ieee80211_request_sched_scan_stop(sdata);
2040 }
2041
2042 static int ieee80211_auth(struct wiphy *wiphy, struct net_device *dev,
2043                           struct cfg80211_auth_request *req)
2044 {
2045         return ieee80211_mgd_auth(IEEE80211_DEV_TO_SUB_IF(dev), req);
2046 }
2047
2048 static int ieee80211_assoc(struct wiphy *wiphy, struct net_device *dev,
2049                            struct cfg80211_assoc_request *req)
2050 {
2051         return ieee80211_mgd_assoc(IEEE80211_DEV_TO_SUB_IF(dev), req);
2052 }
2053
2054 static int ieee80211_deauth(struct wiphy *wiphy, struct net_device *dev,
2055                             struct cfg80211_deauth_request *req)
2056 {
2057         return ieee80211_mgd_deauth(IEEE80211_DEV_TO_SUB_IF(dev), req);
2058 }
2059
2060 static int ieee80211_disassoc(struct wiphy *wiphy, struct net_device *dev,
2061                               struct cfg80211_disassoc_request *req)
2062 {
2063         return ieee80211_mgd_disassoc(IEEE80211_DEV_TO_SUB_IF(dev), req);
2064 }
2065
2066 static int ieee80211_join_ibss(struct wiphy *wiphy, struct net_device *dev,
2067                                struct cfg80211_ibss_params *params)
2068 {
2069         return ieee80211_ibss_join(IEEE80211_DEV_TO_SUB_IF(dev), params);
2070 }
2071
2072 static int ieee80211_leave_ibss(struct wiphy *wiphy, struct net_device *dev)
2073 {
2074         return ieee80211_ibss_leave(IEEE80211_DEV_TO_SUB_IF(dev));
2075 }
2076
2077 static int ieee80211_join_ocb(struct wiphy *wiphy, struct net_device *dev,
2078                               struct ocb_setup *setup)
2079 {
2080         return ieee80211_ocb_join(IEEE80211_DEV_TO_SUB_IF(dev), setup);
2081 }
2082
2083 static int ieee80211_leave_ocb(struct wiphy *wiphy, struct net_device *dev)
2084 {
2085         return ieee80211_ocb_leave(IEEE80211_DEV_TO_SUB_IF(dev));
2086 }
2087
2088 static int ieee80211_set_mcast_rate(struct wiphy *wiphy, struct net_device *dev,
2089                                     int rate[IEEE80211_NUM_BANDS])
2090 {
2091         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2092
2093         memcpy(sdata->vif.bss_conf.mcast_rate, rate,
2094                sizeof(int) * IEEE80211_NUM_BANDS);
2095
2096         return 0;
2097 }
2098
2099 static int ieee80211_set_wiphy_params(struct wiphy *wiphy, u32 changed)
2100 {
2101         struct ieee80211_local *local = wiphy_priv(wiphy);
2102         int err;
2103
2104         if (changed & WIPHY_PARAM_FRAG_THRESHOLD) {
2105                 ieee80211_check_fast_xmit_all(local);
2106
2107                 err = drv_set_frag_threshold(local, wiphy->frag_threshold);
2108
2109                 if (err) {
2110                         ieee80211_check_fast_xmit_all(local);
2111                         return err;
2112                 }
2113         }
2114
2115         if ((changed & WIPHY_PARAM_COVERAGE_CLASS) ||
2116             (changed & WIPHY_PARAM_DYN_ACK)) {
2117                 s16 coverage_class;
2118
2119                 coverage_class = changed & WIPHY_PARAM_COVERAGE_CLASS ?
2120                                         wiphy->coverage_class : -1;
2121                 err = drv_set_coverage_class(local, coverage_class);
2122
2123                 if (err)
2124                         return err;
2125         }
2126
2127         if (changed & WIPHY_PARAM_RTS_THRESHOLD) {
2128                 err = drv_set_rts_threshold(local, wiphy->rts_threshold);
2129
2130                 if (err)
2131                         return err;
2132         }
2133
2134         if (changed & WIPHY_PARAM_RETRY_SHORT) {
2135                 if (wiphy->retry_short > IEEE80211_MAX_TX_RETRY)
2136                         return -EINVAL;
2137                 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
2138         }
2139         if (changed & WIPHY_PARAM_RETRY_LONG) {
2140                 if (wiphy->retry_long > IEEE80211_MAX_TX_RETRY)
2141                         return -EINVAL;
2142                 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
2143         }
2144         if (changed &
2145             (WIPHY_PARAM_RETRY_SHORT | WIPHY_PARAM_RETRY_LONG))
2146                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_RETRY_LIMITS);
2147
2148         return 0;
2149 }
2150
2151 static int ieee80211_set_tx_power(struct wiphy *wiphy,
2152                                   struct wireless_dev *wdev,
2153                                   enum nl80211_tx_power_setting type, int mbm)
2154 {
2155         struct ieee80211_local *local = wiphy_priv(wiphy);
2156         struct ieee80211_sub_if_data *sdata;
2157         enum nl80211_tx_power_setting txp_type = type;
2158         bool update_txp_type = false;
2159
2160         if (wdev) {
2161                 sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
2162
2163                 switch (type) {
2164                 case NL80211_TX_POWER_AUTOMATIC:
2165                         sdata->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
2166                         txp_type = NL80211_TX_POWER_LIMITED;
2167                         break;
2168                 case NL80211_TX_POWER_LIMITED:
2169                 case NL80211_TX_POWER_FIXED:
2170                         if (mbm < 0 || (mbm % 100))
2171                                 return -EOPNOTSUPP;
2172                         sdata->user_power_level = MBM_TO_DBM(mbm);
2173                         break;
2174                 }
2175
2176                 if (txp_type != sdata->vif.bss_conf.txpower_type) {
2177                         update_txp_type = true;
2178                         sdata->vif.bss_conf.txpower_type = txp_type;
2179                 }
2180
2181                 ieee80211_recalc_txpower(sdata, update_txp_type);
2182
2183                 return 0;
2184         }
2185
2186         switch (type) {
2187         case NL80211_TX_POWER_AUTOMATIC:
2188                 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
2189                 txp_type = NL80211_TX_POWER_LIMITED;
2190                 break;
2191         case NL80211_TX_POWER_LIMITED:
2192         case NL80211_TX_POWER_FIXED:
2193                 if (mbm < 0 || (mbm % 100))
2194                         return -EOPNOTSUPP;
2195                 local->user_power_level = MBM_TO_DBM(mbm);
2196                 break;
2197         }
2198
2199         mutex_lock(&local->iflist_mtx);
2200         list_for_each_entry(sdata, &local->interfaces, list) {
2201                 sdata->user_power_level = local->user_power_level;
2202                 if (txp_type != sdata->vif.bss_conf.txpower_type)
2203                         update_txp_type = true;
2204                 sdata->vif.bss_conf.txpower_type = txp_type;
2205         }
2206         list_for_each_entry(sdata, &local->interfaces, list)
2207                 ieee80211_recalc_txpower(sdata, update_txp_type);
2208         mutex_unlock(&local->iflist_mtx);
2209
2210         return 0;
2211 }
2212
2213 static int ieee80211_get_tx_power(struct wiphy *wiphy,
2214                                   struct wireless_dev *wdev,
2215                                   int *dbm)
2216 {
2217         struct ieee80211_local *local = wiphy_priv(wiphy);
2218         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
2219
2220         if (local->ops->get_txpower)
2221                 return drv_get_txpower(local, sdata, dbm);
2222
2223         if (!local->use_chanctx)
2224                 *dbm = local->hw.conf.power_level;
2225         else
2226                 *dbm = sdata->vif.bss_conf.txpower;
2227
2228         return 0;
2229 }
2230
2231 static int ieee80211_set_wds_peer(struct wiphy *wiphy, struct net_device *dev,
2232                                   const u8 *addr)
2233 {
2234         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2235
2236         memcpy(&sdata->u.wds.remote_addr, addr, ETH_ALEN);
2237
2238         return 0;
2239 }
2240
2241 static void ieee80211_rfkill_poll(struct wiphy *wiphy)
2242 {
2243         struct ieee80211_local *local = wiphy_priv(wiphy);
2244
2245         drv_rfkill_poll(local);
2246 }
2247
2248 #ifdef CONFIG_NL80211_TESTMODE
2249 static int ieee80211_testmode_cmd(struct wiphy *wiphy,
2250                                   struct wireless_dev *wdev,
2251                                   void *data, int len)
2252 {
2253         struct ieee80211_local *local = wiphy_priv(wiphy);
2254         struct ieee80211_vif *vif = NULL;
2255
2256         if (!local->ops->testmode_cmd)
2257                 return -EOPNOTSUPP;
2258
2259         if (wdev) {
2260                 struct ieee80211_sub_if_data *sdata;
2261
2262                 sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
2263                 if (sdata->flags & IEEE80211_SDATA_IN_DRIVER)
2264                         vif = &sdata->vif;
2265         }
2266
2267         return local->ops->testmode_cmd(&local->hw, vif, data, len);
2268 }
2269
2270 static int ieee80211_testmode_dump(struct wiphy *wiphy,
2271                                    struct sk_buff *skb,
2272                                    struct netlink_callback *cb,
2273                                    void *data, int len)
2274 {
2275         struct ieee80211_local *local = wiphy_priv(wiphy);
2276
2277         if (!local->ops->testmode_dump)
2278                 return -EOPNOTSUPP;
2279
2280         return local->ops->testmode_dump(&local->hw, skb, cb, data, len);
2281 }
2282 #endif
2283
2284 int __ieee80211_request_smps_ap(struct ieee80211_sub_if_data *sdata,
2285                                 enum ieee80211_smps_mode smps_mode)
2286 {
2287         struct sta_info *sta;
2288         enum ieee80211_smps_mode old_req;
2289
2290         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP))
2291                 return -EINVAL;
2292
2293         if (sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT)
2294                 return 0;
2295
2296         old_req = sdata->u.ap.req_smps;
2297         sdata->u.ap.req_smps = smps_mode;
2298
2299         /* AUTOMATIC doesn't mean much for AP - don't allow it */
2300         if (old_req == smps_mode ||
2301             smps_mode == IEEE80211_SMPS_AUTOMATIC)
2302                 return 0;
2303
2304          /* If no associated stations, there's no need to do anything */
2305         if (!atomic_read(&sdata->u.ap.num_mcast_sta)) {
2306                 sdata->smps_mode = smps_mode;
2307                 ieee80211_queue_work(&sdata->local->hw, &sdata->recalc_smps);
2308                 return 0;
2309         }
2310
2311         ht_dbg(sdata,
2312                "SMPS %d requested in AP mode, sending Action frame to %d stations\n",
2313                smps_mode, atomic_read(&sdata->u.ap.num_mcast_sta));
2314
2315         mutex_lock(&sdata->local->sta_mtx);
2316         list_for_each_entry(sta, &sdata->local->sta_list, list) {
2317                 /*
2318                  * Only stations associated to our AP and
2319                  * associated VLANs
2320                  */
2321                 if (sta->sdata->bss != &sdata->u.ap)
2322                         continue;
2323
2324                 /* This station doesn't support MIMO - skip it */
2325                 if (sta_info_tx_streams(sta) == 1)
2326                         continue;
2327
2328                 /*
2329                  * Don't wake up a STA just to send the action frame
2330                  * unless we are getting more restrictive.
2331                  */
2332                 if (test_sta_flag(sta, WLAN_STA_PS_STA) &&
2333                     !ieee80211_smps_is_restrictive(sta->known_smps_mode,
2334                                                    smps_mode)) {
2335                         ht_dbg(sdata, "Won't send SMPS to sleeping STA %pM\n",
2336                                sta->sta.addr);
2337                         continue;
2338                 }
2339
2340                 /*
2341                  * If the STA is not authorized, wait until it gets
2342                  * authorized and the action frame will be sent then.
2343                  */
2344                 if (!test_sta_flag(sta, WLAN_STA_AUTHORIZED))
2345                         continue;
2346
2347                 ht_dbg(sdata, "Sending SMPS to %pM\n", sta->sta.addr);
2348                 ieee80211_send_smps_action(sdata, smps_mode, sta->sta.addr,
2349                                            sdata->vif.bss_conf.bssid);
2350         }
2351         mutex_unlock(&sdata->local->sta_mtx);
2352
2353         sdata->smps_mode = smps_mode;
2354         ieee80211_queue_work(&sdata->local->hw, &sdata->recalc_smps);
2355
2356         return 0;
2357 }
2358
2359 int __ieee80211_request_smps_mgd(struct ieee80211_sub_if_data *sdata,
2360                                  enum ieee80211_smps_mode smps_mode)
2361 {
2362         const u8 *ap;
2363         enum ieee80211_smps_mode old_req;
2364         int err;
2365
2366         lockdep_assert_held(&sdata->wdev.mtx);
2367
2368         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION))
2369                 return -EINVAL;
2370
2371         old_req = sdata->u.mgd.req_smps;
2372         sdata->u.mgd.req_smps = smps_mode;
2373
2374         if (old_req == smps_mode &&
2375             smps_mode != IEEE80211_SMPS_AUTOMATIC)
2376                 return 0;
2377
2378         /*
2379          * If not associated, or current association is not an HT
2380          * association, there's no need to do anything, just store
2381          * the new value until we associate.
2382          */
2383         if (!sdata->u.mgd.associated ||
2384             sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT)
2385                 return 0;
2386
2387         ap = sdata->u.mgd.associated->bssid;
2388
2389         if (smps_mode == IEEE80211_SMPS_AUTOMATIC) {
2390                 if (sdata->u.mgd.powersave)
2391                         smps_mode = IEEE80211_SMPS_DYNAMIC;
2392                 else
2393                         smps_mode = IEEE80211_SMPS_OFF;
2394         }
2395
2396         /* send SM PS frame to AP */
2397         err = ieee80211_send_smps_action(sdata, smps_mode,
2398                                          ap, ap);
2399         if (err)
2400                 sdata->u.mgd.req_smps = old_req;
2401
2402         return err;
2403 }
2404
2405 static int ieee80211_set_power_mgmt(struct wiphy *wiphy, struct net_device *dev,
2406                                     bool enabled, int timeout)
2407 {
2408         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2409         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2410
2411         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2412                 return -EOPNOTSUPP;
2413
2414         if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS))
2415                 return -EOPNOTSUPP;
2416
2417         if (enabled == sdata->u.mgd.powersave &&
2418             timeout == local->dynamic_ps_forced_timeout)
2419                 return 0;
2420
2421         sdata->u.mgd.powersave = enabled;
2422         local->dynamic_ps_forced_timeout = timeout;
2423
2424         /* no change, but if automatic follow powersave */
2425         sdata_lock(sdata);
2426         __ieee80211_request_smps_mgd(sdata, sdata->u.mgd.req_smps);
2427         sdata_unlock(sdata);
2428
2429         if (ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS))
2430                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2431
2432         ieee80211_recalc_ps(local, -1);
2433         ieee80211_recalc_ps_vif(sdata);
2434
2435         return 0;
2436 }
2437
2438 static int ieee80211_set_cqm_rssi_config(struct wiphy *wiphy,
2439                                          struct net_device *dev,
2440                                          s32 rssi_thold, u32 rssi_hyst)
2441 {
2442         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2443         struct ieee80211_vif *vif = &sdata->vif;
2444         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
2445
2446         if (rssi_thold == bss_conf->cqm_rssi_thold &&
2447             rssi_hyst == bss_conf->cqm_rssi_hyst)
2448                 return 0;
2449
2450         bss_conf->cqm_rssi_thold = rssi_thold;
2451         bss_conf->cqm_rssi_hyst = rssi_hyst;
2452
2453         /* tell the driver upon association, unless already associated */
2454         if (sdata->u.mgd.associated &&
2455             sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)
2456                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_CQM);
2457
2458         return 0;
2459 }
2460
2461 static int ieee80211_set_bitrate_mask(struct wiphy *wiphy,
2462                                       struct net_device *dev,
2463                                       const u8 *addr,
2464                                       const struct cfg80211_bitrate_mask *mask)
2465 {
2466         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2467         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2468         int i, ret;
2469
2470         if (!ieee80211_sdata_running(sdata))
2471                 return -ENETDOWN;
2472
2473         if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) {
2474                 ret = drv_set_bitrate_mask(local, sdata, mask);
2475                 if (ret)
2476                         return ret;
2477         }
2478
2479         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
2480                 struct ieee80211_supported_band *sband = wiphy->bands[i];
2481                 int j;
2482
2483                 sdata->rc_rateidx_mask[i] = mask->control[i].legacy;
2484                 memcpy(sdata->rc_rateidx_mcs_mask[i], mask->control[i].ht_mcs,
2485                        sizeof(mask->control[i].ht_mcs));
2486
2487                 sdata->rc_has_mcs_mask[i] = false;
2488                 if (!sband)
2489                         continue;
2490
2491                 for (j = 0; j < IEEE80211_HT_MCS_MASK_LEN; j++)
2492                         if (~sdata->rc_rateidx_mcs_mask[i][j]) {
2493                                 sdata->rc_has_mcs_mask[i] = true;
2494                                 break;
2495                         }
2496         }
2497
2498         return 0;
2499 }
2500
2501 static bool ieee80211_coalesce_started_roc(struct ieee80211_local *local,
2502                                            struct ieee80211_roc_work *new_roc,
2503                                            struct ieee80211_roc_work *cur_roc)
2504 {
2505         unsigned long now = jiffies;
2506         unsigned long remaining = cur_roc->hw_start_time +
2507                                   msecs_to_jiffies(cur_roc->duration) -
2508                                   now;
2509
2510         if (WARN_ON(!cur_roc->started || !cur_roc->hw_begun))
2511                 return false;
2512
2513         /* if it doesn't fit entirely, schedule a new one */
2514         if (new_roc->duration > jiffies_to_msecs(remaining))
2515                 return false;
2516
2517         ieee80211_handle_roc_started(new_roc);
2518
2519         /* add to dependents so we send the expired event properly */
2520         list_add_tail(&new_roc->list, &cur_roc->dependents);
2521         return true;
2522 }
2523
2524 static u64 ieee80211_mgmt_tx_cookie(struct ieee80211_local *local)
2525 {
2526         lockdep_assert_held(&local->mtx);
2527
2528         local->roc_cookie_counter++;
2529
2530         /* wow, you wrapped 64 bits ... more likely a bug */
2531         if (WARN_ON(local->roc_cookie_counter == 0))
2532                 local->roc_cookie_counter++;
2533
2534         return local->roc_cookie_counter;
2535 }
2536
2537 static int ieee80211_start_roc_work(struct ieee80211_local *local,
2538                                     struct ieee80211_sub_if_data *sdata,
2539                                     struct ieee80211_channel *channel,
2540                                     unsigned int duration, u64 *cookie,
2541                                     struct sk_buff *txskb,
2542                                     enum ieee80211_roc_type type)
2543 {
2544         struct ieee80211_roc_work *roc, *tmp;
2545         bool queued = false;
2546         int ret;
2547
2548         lockdep_assert_held(&local->mtx);
2549
2550         if (local->use_chanctx && !local->ops->remain_on_channel)
2551                 return -EOPNOTSUPP;
2552
2553         roc = kzalloc(sizeof(*roc), GFP_KERNEL);
2554         if (!roc)
2555                 return -ENOMEM;
2556
2557         /*
2558          * If the duration is zero, then the driver
2559          * wouldn't actually do anything. Set it to
2560          * 10 for now.
2561          *
2562          * TODO: cancel the off-channel operation
2563          *       when we get the SKB's TX status and
2564          *       the wait time was zero before.
2565          */
2566         if (!duration)
2567                 duration = 10;
2568
2569         roc->chan = channel;
2570         roc->duration = duration;
2571         roc->req_duration = duration;
2572         roc->frame = txskb;
2573         roc->type = type;
2574         roc->sdata = sdata;
2575         INIT_DELAYED_WORK(&roc->work, ieee80211_sw_roc_work);
2576         INIT_LIST_HEAD(&roc->dependents);
2577
2578         /*
2579          * cookie is either the roc cookie (for normal roc)
2580          * or the SKB (for mgmt TX)
2581          */
2582         if (!txskb) {
2583                 roc->cookie = ieee80211_mgmt_tx_cookie(local);
2584                 *cookie = roc->cookie;
2585         } else {
2586                 roc->mgmt_tx_cookie = *cookie;
2587         }
2588
2589         /* if there's one pending or we're scanning, queue this one */
2590         if (!list_empty(&local->roc_list) ||
2591             local->scanning || ieee80211_is_radar_required(local))
2592                 goto out_check_combine;
2593
2594         /* if not HW assist, just queue & schedule work */
2595         if (!local->ops->remain_on_channel) {
2596                 ieee80211_queue_delayed_work(&local->hw, &roc->work, 0);
2597                 goto out_queue;
2598         }
2599
2600         /* otherwise actually kick it off here (for error handling) */
2601
2602         ret = drv_remain_on_channel(local, sdata, channel, duration, type);
2603         if (ret) {
2604                 kfree(roc);
2605                 return ret;
2606         }
2607
2608         roc->started = true;
2609         goto out_queue;
2610
2611  out_check_combine:
2612         list_for_each_entry(tmp, &local->roc_list, list) {
2613                 if (tmp->chan != channel || tmp->sdata != sdata)
2614                         continue;
2615
2616                 /*
2617                  * Extend this ROC if possible:
2618                  *
2619                  * If it hasn't started yet, just increase the duration
2620                  * and add the new one to the list of dependents.
2621                  * If the type of the new ROC has higher priority, modify the
2622                  * type of the previous one to match that of the new one.
2623                  */
2624                 if (!tmp->started) {
2625                         list_add_tail(&roc->list, &tmp->dependents);
2626                         tmp->duration = max(tmp->duration, roc->duration);
2627                         tmp->type = max(tmp->type, roc->type);
2628                         queued = true;
2629                         break;
2630                 }
2631
2632                 /* If it has already started, it's more difficult ... */
2633                 if (local->ops->remain_on_channel) {
2634                         /*
2635                          * In the offloaded ROC case, if it hasn't begun, add
2636                          * this new one to the dependent list to be handled
2637                          * when the master one begins. If it has begun,
2638                          * check if it fits entirely within the existing one,
2639                          * in which case it will just be dependent as well.
2640                          * Otherwise, schedule it by itself.
2641                          */
2642                         if (!tmp->hw_begun) {
2643                                 list_add_tail(&roc->list, &tmp->dependents);
2644                                 queued = true;
2645                                 break;
2646                         }
2647
2648                         if (ieee80211_coalesce_started_roc(local, roc, tmp))
2649                                 queued = true;
2650                 } else if (del_timer_sync(&tmp->work.timer)) {
2651                         unsigned long new_end;
2652
2653                         /*
2654                          * In the software ROC case, cancel the timer, if
2655                          * that fails then the finish work is already
2656                          * queued/pending and thus we queue the new ROC
2657                          * normally, if that succeeds then we can extend
2658                          * the timer duration and TX the frame (if any.)
2659                          */
2660
2661                         list_add_tail(&roc->list, &tmp->dependents);
2662                         queued = true;
2663
2664                         new_end = jiffies + msecs_to_jiffies(roc->duration);
2665
2666                         /* ok, it was started & we canceled timer */
2667                         if (time_after(new_end, tmp->work.timer.expires))
2668                                 mod_timer(&tmp->work.timer, new_end);
2669                         else
2670                                 add_timer(&tmp->work.timer);
2671
2672                         ieee80211_handle_roc_started(roc);
2673                 }
2674                 break;
2675         }
2676
2677  out_queue:
2678         if (!queued)
2679                 list_add_tail(&roc->list, &local->roc_list);
2680
2681         return 0;
2682 }
2683
2684 static int ieee80211_remain_on_channel(struct wiphy *wiphy,
2685                                        struct wireless_dev *wdev,
2686                                        struct ieee80211_channel *chan,
2687                                        unsigned int duration,
2688                                        u64 *cookie)
2689 {
2690         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
2691         struct ieee80211_local *local = sdata->local;
2692         int ret;
2693
2694         mutex_lock(&local->mtx);
2695         ret = ieee80211_start_roc_work(local, sdata, chan,
2696                                        duration, cookie, NULL,
2697                                        IEEE80211_ROC_TYPE_NORMAL);
2698         mutex_unlock(&local->mtx);
2699
2700         return ret;
2701 }
2702
2703 static int ieee80211_cancel_roc(struct ieee80211_local *local,
2704                                 u64 cookie, bool mgmt_tx)
2705 {
2706         struct ieee80211_roc_work *roc, *tmp, *found = NULL;
2707         int ret;
2708
2709         mutex_lock(&local->mtx);
2710         list_for_each_entry_safe(roc, tmp, &local->roc_list, list) {
2711                 struct ieee80211_roc_work *dep, *tmp2;
2712
2713                 list_for_each_entry_safe(dep, tmp2, &roc->dependents, list) {
2714                         if (!mgmt_tx && dep->cookie != cookie)
2715                                 continue;
2716                         else if (mgmt_tx && dep->mgmt_tx_cookie != cookie)
2717                                 continue;
2718                         /* found dependent item -- just remove it */
2719                         list_del(&dep->list);
2720                         mutex_unlock(&local->mtx);
2721
2722                         ieee80211_roc_notify_destroy(dep, true);
2723                         return 0;
2724                 }
2725
2726                 if (!mgmt_tx && roc->cookie != cookie)
2727                         continue;
2728                 else if (mgmt_tx && roc->mgmt_tx_cookie != cookie)
2729                         continue;
2730
2731                 found = roc;
2732                 break;
2733         }
2734
2735         if (!found) {
2736                 mutex_unlock(&local->mtx);
2737                 return -ENOENT;
2738         }
2739
2740         /*
2741          * We found the item to cancel, so do that. Note that it
2742          * may have dependents, which we also cancel (and send
2743          * the expired signal for.) Not doing so would be quite
2744          * tricky here, but we may need to fix it later.
2745          */
2746
2747         if (local->ops->remain_on_channel) {
2748                 if (found->started) {
2749                         ret = drv_cancel_remain_on_channel(local);
2750                         if (WARN_ON_ONCE(ret)) {
2751                                 mutex_unlock(&local->mtx);
2752                                 return ret;
2753                         }
2754                 }
2755
2756                 list_del(&found->list);
2757
2758                 if (found->started)
2759                         ieee80211_start_next_roc(local);
2760                 mutex_unlock(&local->mtx);
2761
2762                 ieee80211_roc_notify_destroy(found, true);
2763         } else {
2764                 /* work may be pending so use it all the time */
2765                 found->abort = true;
2766                 ieee80211_queue_delayed_work(&local->hw, &found->work, 0);
2767
2768                 mutex_unlock(&local->mtx);
2769
2770                 /* work will clean up etc */
2771                 flush_delayed_work(&found->work);
2772                 WARN_ON(!found->to_be_freed);
2773                 kfree(found);
2774         }
2775
2776         return 0;
2777 }
2778
2779 static int ieee80211_cancel_remain_on_channel(struct wiphy *wiphy,
2780                                               struct wireless_dev *wdev,
2781                                               u64 cookie)
2782 {
2783         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
2784         struct ieee80211_local *local = sdata->local;
2785
2786         return ieee80211_cancel_roc(local, cookie, false);
2787 }
2788
2789 static int ieee80211_start_radar_detection(struct wiphy *wiphy,
2790                                            struct net_device *dev,
2791                                            struct cfg80211_chan_def *chandef,
2792                                            u32 cac_time_ms)
2793 {
2794         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2795         struct ieee80211_local *local = sdata->local;
2796         int err;
2797
2798         mutex_lock(&local->mtx);
2799         if (!list_empty(&local->roc_list) || local->scanning) {
2800                 err = -EBUSY;
2801                 goto out_unlock;
2802         }
2803
2804         /* whatever, but channel contexts should not complain about that one */
2805         sdata->smps_mode = IEEE80211_SMPS_OFF;
2806         sdata->needed_rx_chains = local->rx_chains;
2807
2808         err = ieee80211_vif_use_channel(sdata, chandef,
2809                                         IEEE80211_CHANCTX_SHARED);
2810         if (err)
2811                 goto out_unlock;
2812
2813         ieee80211_queue_delayed_work(&sdata->local->hw,
2814                                      &sdata->dfs_cac_timer_work,
2815                                      msecs_to_jiffies(cac_time_ms));
2816
2817  out_unlock:
2818         mutex_unlock(&local->mtx);
2819         return err;
2820 }
2821
2822 static struct cfg80211_beacon_data *
2823 cfg80211_beacon_dup(struct cfg80211_beacon_data *beacon)
2824 {
2825         struct cfg80211_beacon_data *new_beacon;
2826         u8 *pos;
2827         int len;
2828
2829         len = beacon->head_len + beacon->tail_len + beacon->beacon_ies_len +
2830               beacon->proberesp_ies_len + beacon->assocresp_ies_len +
2831               beacon->probe_resp_len;
2832
2833         new_beacon = kzalloc(sizeof(*new_beacon) + len, GFP_KERNEL);
2834         if (!new_beacon)
2835                 return NULL;
2836
2837         pos = (u8 *)(new_beacon + 1);
2838         if (beacon->head_len) {
2839                 new_beacon->head_len = beacon->head_len;
2840                 new_beacon->head = pos;
2841                 memcpy(pos, beacon->head, beacon->head_len);
2842                 pos += beacon->head_len;
2843         }
2844         if (beacon->tail_len) {
2845                 new_beacon->tail_len = beacon->tail_len;
2846                 new_beacon->tail = pos;
2847                 memcpy(pos, beacon->tail, beacon->tail_len);
2848                 pos += beacon->tail_len;
2849         }
2850         if (beacon->beacon_ies_len) {
2851                 new_beacon->beacon_ies_len = beacon->beacon_ies_len;
2852                 new_beacon->beacon_ies = pos;
2853                 memcpy(pos, beacon->beacon_ies, beacon->beacon_ies_len);
2854                 pos += beacon->beacon_ies_len;
2855         }
2856         if (beacon->proberesp_ies_len) {
2857                 new_beacon->proberesp_ies_len = beacon->proberesp_ies_len;
2858                 new_beacon->proberesp_ies = pos;
2859                 memcpy(pos, beacon->proberesp_ies, beacon->proberesp_ies_len);
2860                 pos += beacon->proberesp_ies_len;
2861         }
2862         if (beacon->assocresp_ies_len) {
2863                 new_beacon->assocresp_ies_len = beacon->assocresp_ies_len;
2864                 new_beacon->assocresp_ies = pos;
2865                 memcpy(pos, beacon->assocresp_ies, beacon->assocresp_ies_len);
2866                 pos += beacon->assocresp_ies_len;
2867         }
2868         if (beacon->probe_resp_len) {
2869                 new_beacon->probe_resp_len = beacon->probe_resp_len;
2870                 beacon->probe_resp = pos;
2871                 memcpy(pos, beacon->probe_resp, beacon->probe_resp_len);
2872                 pos += beacon->probe_resp_len;
2873         }
2874
2875         return new_beacon;
2876 }
2877
2878 void ieee80211_csa_finish(struct ieee80211_vif *vif)
2879 {
2880         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2881
2882         ieee80211_queue_work(&sdata->local->hw,
2883                              &sdata->csa_finalize_work);
2884 }
2885 EXPORT_SYMBOL(ieee80211_csa_finish);
2886
2887 static int ieee80211_set_after_csa_beacon(struct ieee80211_sub_if_data *sdata,
2888                                           u32 *changed)
2889 {
2890         int err;
2891
2892         switch (sdata->vif.type) {
2893         case NL80211_IFTYPE_AP:
2894                 err = ieee80211_assign_beacon(sdata, sdata->u.ap.next_beacon,
2895                                               NULL);
2896                 kfree(sdata->u.ap.next_beacon);
2897                 sdata->u.ap.next_beacon = NULL;
2898
2899                 if (err < 0)
2900                         return err;
2901                 *changed |= err;
2902                 break;
2903         case NL80211_IFTYPE_ADHOC:
2904                 err = ieee80211_ibss_finish_csa(sdata);
2905                 if (err < 0)
2906                         return err;
2907                 *changed |= err;
2908                 break;
2909 #ifdef CONFIG_MAC80211_MESH
2910         case NL80211_IFTYPE_MESH_POINT:
2911                 err = ieee80211_mesh_finish_csa(sdata);
2912                 if (err < 0)
2913                         return err;
2914                 *changed |= err;
2915                 break;
2916 #endif
2917         default:
2918                 WARN_ON(1);
2919                 return -EINVAL;
2920         }
2921
2922         return 0;
2923 }
2924
2925 static int __ieee80211_csa_finalize(struct ieee80211_sub_if_data *sdata)
2926 {
2927         struct ieee80211_local *local = sdata->local;
2928         u32 changed = 0;
2929         int err;
2930
2931         sdata_assert_lock(sdata);
2932         lockdep_assert_held(&local->mtx);
2933         lockdep_assert_held(&local->chanctx_mtx);
2934
2935         /*
2936          * using reservation isn't immediate as it may be deferred until later
2937          * with multi-vif. once reservation is complete it will re-schedule the
2938          * work with no reserved_chanctx so verify chandef to check if it
2939          * completed successfully
2940          */
2941
2942         if (sdata->reserved_chanctx) {
2943                 /*
2944                  * with multi-vif csa driver may call ieee80211_csa_finish()
2945                  * many times while waiting for other interfaces to use their
2946                  * reservations
2947                  */
2948                 if (sdata->reserved_ready)
2949                         return 0;
2950
2951                 return ieee80211_vif_use_reserved_context(sdata);
2952         }
2953
2954         if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
2955                                         &sdata->csa_chandef))
2956                 return -EINVAL;
2957
2958         sdata->vif.csa_active = false;
2959
2960         err = ieee80211_set_after_csa_beacon(sdata, &changed);
2961         if (err)
2962                 return err;
2963
2964         ieee80211_bss_info_change_notify(sdata, changed);
2965
2966         if (sdata->csa_block_tx) {
2967                 ieee80211_wake_vif_queues(local, sdata,
2968                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2969                 sdata->csa_block_tx = false;
2970         }
2971
2972         err = drv_post_channel_switch(sdata);
2973         if (err)
2974                 return err;
2975
2976         cfg80211_ch_switch_notify(sdata->dev, &sdata->csa_chandef);
2977
2978         return 0;
2979 }
2980
2981 static void ieee80211_csa_finalize(struct ieee80211_sub_if_data *sdata)
2982 {
2983         if (__ieee80211_csa_finalize(sdata)) {
2984                 sdata_info(sdata, "failed to finalize CSA, disconnecting\n");
2985                 cfg80211_stop_iface(sdata->local->hw.wiphy, &sdata->wdev,
2986                                     GFP_KERNEL);
2987         }
2988 }
2989
2990 void ieee80211_csa_finalize_work(struct work_struct *work)
2991 {
2992         struct ieee80211_sub_if_data *sdata =
2993                 container_of(work, struct ieee80211_sub_if_data,
2994                              csa_finalize_work);
2995         struct ieee80211_local *local = sdata->local;
2996
2997         sdata_lock(sdata);
2998         mutex_lock(&local->mtx);
2999         mutex_lock(&local->chanctx_mtx);
3000
3001         /* AP might have been stopped while waiting for the lock. */
3002         if (!sdata->vif.csa_active)
3003                 goto unlock;
3004
3005         if (!ieee80211_sdata_running(sdata))
3006                 goto unlock;
3007
3008         ieee80211_csa_finalize(sdata);
3009
3010 unlock:
3011         mutex_unlock(&local->chanctx_mtx);
3012         mutex_unlock(&local->mtx);
3013         sdata_unlock(sdata);
3014 }
3015
3016 static int ieee80211_set_csa_beacon(struct ieee80211_sub_if_data *sdata,
3017                                     struct cfg80211_csa_settings *params,
3018                                     u32 *changed)
3019 {
3020         struct ieee80211_csa_settings csa = {};
3021         int err;
3022
3023         switch (sdata->vif.type) {
3024         case NL80211_IFTYPE_AP:
3025                 sdata->u.ap.next_beacon =
3026                         cfg80211_beacon_dup(&params->beacon_after);
3027                 if (!sdata->u.ap.next_beacon)
3028                         return -ENOMEM;
3029
3030                 /*
3031                  * With a count of 0, we don't have to wait for any
3032                  * TBTT before switching, so complete the CSA
3033                  * immediately.  In theory, with a count == 1 we
3034                  * should delay the switch until just before the next
3035                  * TBTT, but that would complicate things so we switch
3036                  * immediately too.  If we would delay the switch
3037                  * until the next TBTT, we would have to set the probe
3038                  * response here.
3039                  *
3040                  * TODO: A channel switch with count <= 1 without
3041                  * sending a CSA action frame is kind of useless,
3042                  * because the clients won't know we're changing
3043                  * channels.  The action frame must be implemented
3044                  * either here or in the userspace.
3045                  */
3046                 if (params->count <= 1)
3047                         break;
3048
3049                 if ((params->n_counter_offsets_beacon >
3050                      IEEE80211_MAX_CSA_COUNTERS_NUM) ||
3051                     (params->n_counter_offsets_presp >
3052                      IEEE80211_MAX_CSA_COUNTERS_NUM))
3053                         return -EINVAL;
3054
3055                 csa.counter_offsets_beacon = params->counter_offsets_beacon;
3056                 csa.counter_offsets_presp = params->counter_offsets_presp;
3057                 csa.n_counter_offsets_beacon = params->n_counter_offsets_beacon;
3058                 csa.n_counter_offsets_presp = params->n_counter_offsets_presp;
3059                 csa.count = params->count;
3060
3061                 err = ieee80211_assign_beacon(sdata, &params->beacon_csa, &csa);
3062                 if (err < 0) {
3063                         kfree(sdata->u.ap.next_beacon);
3064                         return err;
3065                 }
3066                 *changed |= err;
3067
3068                 break;
3069         case NL80211_IFTYPE_ADHOC:
3070                 if (!sdata->vif.bss_conf.ibss_joined)
3071                         return -EINVAL;
3072
3073                 if (params->chandef.width != sdata->u.ibss.chandef.width)
3074                         return -EINVAL;
3075
3076                 switch (params->chandef.width) {
3077                 case NL80211_CHAN_WIDTH_40:
3078                         if (cfg80211_get_chandef_type(&params->chandef) !=
3079                             cfg80211_get_chandef_type(&sdata->u.ibss.chandef))
3080                                 return -EINVAL;
3081                 case NL80211_CHAN_WIDTH_5:
3082                 case NL80211_CHAN_WIDTH_10:
3083                 case NL80211_CHAN_WIDTH_20_NOHT:
3084                 case NL80211_CHAN_WIDTH_20:
3085                         break;
3086                 default:
3087                         return -EINVAL;
3088                 }
3089
3090                 /* changes into another band are not supported */
3091                 if (sdata->u.ibss.chandef.chan->band !=
3092                     params->chandef.chan->band)
3093                         return -EINVAL;
3094
3095                 /* see comments in the NL80211_IFTYPE_AP block */
3096                 if (params->count > 1) {
3097                         err = ieee80211_ibss_csa_beacon(sdata, params);
3098                         if (err < 0)
3099                                 return err;
3100                         *changed |= err;
3101                 }
3102
3103                 ieee80211_send_action_csa(sdata, params);
3104
3105                 break;
3106 #ifdef CONFIG_MAC80211_MESH
3107         case NL80211_IFTYPE_MESH_POINT: {
3108                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3109
3110                 if (params->chandef.width != sdata->vif.bss_conf.chandef.width)
3111                         return -EINVAL;
3112
3113                 /* changes into another band are not supported */
3114                 if (sdata->vif.bss_conf.chandef.chan->band !=
3115                     params->chandef.chan->band)
3116                         return -EINVAL;
3117
3118                 if (ifmsh->csa_role == IEEE80211_MESH_CSA_ROLE_NONE) {
3119                         ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_INIT;
3120                         if (!ifmsh->pre_value)
3121                                 ifmsh->pre_value = 1;
3122                         else
3123                                 ifmsh->pre_value++;
3124                 }
3125
3126                 /* see comments in the NL80211_IFTYPE_AP block */
3127                 if (params->count > 1) {
3128                         err = ieee80211_mesh_csa_beacon(sdata, params);
3129                         if (err < 0) {
3130                                 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE;
3131                                 return err;
3132                         }
3133                         *changed |= err;
3134                 }
3135
3136                 if (ifmsh->csa_role == IEEE80211_MESH_CSA_ROLE_INIT)
3137                         ieee80211_send_action_csa(sdata, params);
3138
3139                 break;
3140                 }
3141 #endif
3142         default:
3143                 return -EOPNOTSUPP;
3144         }
3145
3146         return 0;
3147 }
3148
3149 static int
3150 __ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev,
3151                            struct cfg80211_csa_settings *params)
3152 {
3153         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3154         struct ieee80211_local *local = sdata->local;
3155         struct ieee80211_channel_switch ch_switch;
3156         struct ieee80211_chanctx_conf *conf;
3157         struct ieee80211_chanctx *chanctx;
3158         u32 changed = 0;
3159         int err;
3160
3161         sdata_assert_lock(sdata);
3162         lockdep_assert_held(&local->mtx);
3163
3164         if (!list_empty(&local->roc_list) || local->scanning)
3165                 return -EBUSY;
3166
3167         if (sdata->wdev.cac_started)
3168                 return -EBUSY;
3169
3170         if (cfg80211_chandef_identical(&params->chandef,
3171                                        &sdata->vif.bss_conf.chandef))
3172                 return -EINVAL;
3173
3174         /* don't allow another channel switch if one is already active. */
3175         if (sdata->vif.csa_active)
3176                 return -EBUSY;
3177
3178         mutex_lock(&local->chanctx_mtx);
3179         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
3180                                          lockdep_is_held(&local->chanctx_mtx));
3181         if (!conf) {
3182                 err = -EBUSY;
3183                 goto out;
3184         }
3185
3186         chanctx = container_of(conf, struct ieee80211_chanctx, conf);
3187         if (!chanctx) {
3188                 err = -EBUSY;
3189                 goto out;
3190         }
3191
3192         ch_switch.timestamp = 0;
3193         ch_switch.device_timestamp = 0;
3194         ch_switch.block_tx = params->block_tx;
3195         ch_switch.chandef = params->chandef;
3196         ch_switch.count = params->count;
3197
3198         err = drv_pre_channel_switch(sdata, &ch_switch);
3199         if (err)
3200                 goto out;
3201
3202         err = ieee80211_vif_reserve_chanctx(sdata, &params->chandef,
3203                                             chanctx->mode,
3204                                             params->radar_required);
3205         if (err)
3206                 goto out;
3207
3208         /* if reservation is invalid then this will fail */
3209         err = ieee80211_check_combinations(sdata, NULL, chanctx->mode, 0);
3210         if (err) {
3211                 ieee80211_vif_unreserve_chanctx(sdata);
3212                 goto out;
3213         }
3214
3215         err = ieee80211_set_csa_beacon(sdata, params, &changed);
3216         if (err) {
3217                 ieee80211_vif_unreserve_chanctx(sdata);
3218                 goto out;
3219         }
3220
3221         sdata->csa_chandef = params->chandef;
3222         sdata->csa_block_tx = params->block_tx;
3223         sdata->vif.csa_active = true;
3224
3225         if (sdata->csa_block_tx)
3226                 ieee80211_stop_vif_queues(local, sdata,
3227                                           IEEE80211_QUEUE_STOP_REASON_CSA);
3228
3229         cfg80211_ch_switch_started_notify(sdata->dev, &sdata->csa_chandef,
3230                                           params->count);
3231
3232         if (changed) {
3233                 ieee80211_bss_info_change_notify(sdata, changed);
3234                 drv_channel_switch_beacon(sdata, &params->chandef);
3235         } else {
3236                 /* if the beacon didn't change, we can finalize immediately */
3237                 ieee80211_csa_finalize(sdata);
3238         }
3239
3240 out:
3241         mutex_unlock(&local->chanctx_mtx);
3242         return err;
3243 }
3244
3245 int ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev,
3246                              struct cfg80211_csa_settings *params)
3247 {
3248         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3249         struct ieee80211_local *local = sdata->local;
3250         int err;
3251
3252         mutex_lock(&local->mtx);
3253         err = __ieee80211_channel_switch(wiphy, dev, params);
3254         mutex_unlock(&local->mtx);
3255
3256         return err;
3257 }
3258
3259 static struct sk_buff *ieee80211_make_ack_skb(struct ieee80211_local *local,
3260                                               struct sk_buff *skb, u64 *cookie,
3261                                               gfp_t gfp)
3262 {
3263         unsigned long spin_flags;
3264         struct sk_buff *ack_skb;
3265         int id;
3266
3267         ack_skb = skb_copy(skb, gfp);
3268         if (!ack_skb)
3269                 return ERR_PTR(-ENOMEM);
3270
3271         spin_lock_irqsave(&local->ack_status_lock, spin_flags);
3272         id = idr_alloc(&local->ack_status_frames, ack_skb,
3273                        1, 0x10000, GFP_ATOMIC);
3274         spin_unlock_irqrestore(&local->ack_status_lock, spin_flags);
3275
3276         if (id < 0) {
3277                 kfree_skb(ack_skb);
3278                 return ERR_PTR(-ENOMEM);
3279         }
3280
3281         IEEE80211_SKB_CB(skb)->ack_frame_id = id;
3282
3283         *cookie = ieee80211_mgmt_tx_cookie(local);
3284         IEEE80211_SKB_CB(ack_skb)->ack.cookie = *cookie;
3285
3286         return ack_skb;
3287 }
3288
3289 static int ieee80211_mgmt_tx(struct wiphy *wiphy, struct wireless_dev *wdev,
3290                              struct cfg80211_mgmt_tx_params *params,
3291                              u64 *cookie)
3292 {
3293         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
3294         struct ieee80211_local *local = sdata->local;
3295         struct sk_buff *skb, *ack_skb;
3296         struct sta_info *sta;
3297         const struct ieee80211_mgmt *mgmt = (void *)params->buf;
3298         bool need_offchan = false;
3299         u32 flags;
3300         int ret;
3301         u8 *data;
3302
3303         if (params->dont_wait_for_ack)
3304                 flags = IEEE80211_TX_CTL_NO_ACK;
3305         else
3306                 flags = IEEE80211_TX_INTFL_NL80211_FRAME_TX |
3307                         IEEE80211_TX_CTL_REQ_TX_STATUS;
3308
3309         if (params->no_cck)
3310                 flags |= IEEE80211_TX_CTL_NO_CCK_RATE;
3311
3312         switch (sdata->vif.type) {
3313         case NL80211_IFTYPE_ADHOC:
3314                 if (!sdata->vif.bss_conf.ibss_joined)
3315                         need_offchan = true;
3316                 /* fall through */
3317 #ifdef CONFIG_MAC80211_MESH
3318         case NL80211_IFTYPE_MESH_POINT:
3319                 if (ieee80211_vif_is_mesh(&sdata->vif) &&
3320                     !sdata->u.mesh.mesh_id_len)
3321                         need_offchan = true;
3322                 /* fall through */
3323 #endif
3324         case NL80211_IFTYPE_AP:
3325         case NL80211_IFTYPE_AP_VLAN:
3326         case NL80211_IFTYPE_P2P_GO:
3327                 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3328                     !ieee80211_vif_is_mesh(&sdata->vif) &&
3329                     !rcu_access_pointer(sdata->bss->beacon))
3330                         need_offchan = true;
3331                 if (!ieee80211_is_action(mgmt->frame_control) ||
3332                     mgmt->u.action.category == WLAN_CATEGORY_PUBLIC ||
3333                     mgmt->u.action.category == WLAN_CATEGORY_SELF_PROTECTED ||
3334                     mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT)
3335                         break;
3336                 rcu_read_lock();
3337                 sta = sta_info_get(sdata, mgmt->da);
3338                 rcu_read_unlock();
3339                 if (!sta)
3340                         return -ENOLINK;
3341                 break;
3342         case NL80211_IFTYPE_STATION:
3343         case NL80211_IFTYPE_P2P_CLIENT:
3344                 sdata_lock(sdata);
3345                 if (!sdata->u.mgd.associated ||
3346                     (params->offchan && params->wait &&
3347                      local->ops->remain_on_channel &&
3348                      memcmp(sdata->u.mgd.associated->bssid,
3349                             mgmt->bssid, ETH_ALEN)))
3350                         need_offchan = true;
3351                 sdata_unlock(sdata);
3352                 break;
3353         case NL80211_IFTYPE_P2P_DEVICE:
3354                 need_offchan = true;
3355                 break;
3356         default:
3357                 return -EOPNOTSUPP;
3358         }
3359
3360         /* configurations requiring offchan cannot work if no channel has been
3361          * specified
3362          */
3363         if (need_offchan && !params->chan)
3364                 return -EINVAL;
3365
3366         mutex_lock(&local->mtx);
3367
3368         /* Check if the operating channel is the requested channel */
3369         if (!need_offchan) {
3370                 struct ieee80211_chanctx_conf *chanctx_conf;
3371
3372                 rcu_read_lock();
3373                 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3374
3375                 if (chanctx_conf) {
3376                         need_offchan = params->chan &&
3377                                        (params->chan !=
3378                                         chanctx_conf->def.chan);
3379                 } else if (!params->chan) {
3380                         ret = -EINVAL;
3381                         rcu_read_unlock();
3382                         goto out_unlock;
3383                 } else {
3384                         need_offchan = true;
3385                 }
3386                 rcu_read_unlock();
3387         }
3388
3389         if (need_offchan && !params->offchan) {
3390                 ret = -EBUSY;
3391                 goto out_unlock;
3392         }
3393
3394         skb = dev_alloc_skb(local->hw.extra_tx_headroom + params->len);
3395         if (!skb) {
3396                 ret = -ENOMEM;
3397                 goto out_unlock;
3398         }
3399         skb_reserve(skb, local->hw.extra_tx_headroom);
3400
3401         data = skb_put(skb, params->len);
3402         memcpy(data, params->buf, params->len);
3403
3404         /* Update CSA counters */
3405         if (sdata->vif.csa_active &&
3406             (sdata->vif.type == NL80211_IFTYPE_AP ||
3407              sdata->vif.type == NL80211_IFTYPE_MESH_POINT ||
3408              sdata->vif.type == NL80211_IFTYPE_ADHOC) &&
3409             params->n_csa_offsets) {
3410                 int i;
3411                 struct beacon_data *beacon = NULL;
3412
3413                 rcu_read_lock();
3414
3415                 if (sdata->vif.type == NL80211_IFTYPE_AP)
3416                         beacon = rcu_dereference(sdata->u.ap.beacon);
3417                 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
3418                         beacon = rcu_dereference(sdata->u.ibss.presp);
3419                 else if (ieee80211_vif_is_mesh(&sdata->vif))
3420                         beacon = rcu_dereference(sdata->u.mesh.beacon);
3421
3422                 if (beacon)
3423                         for (i = 0; i < params->n_csa_offsets; i++)
3424                                 data[params->csa_offsets[i]] =
3425                                         beacon->csa_current_counter;
3426
3427                 rcu_read_unlock();
3428         }
3429
3430         IEEE80211_SKB_CB(skb)->flags = flags;
3431
3432         skb->dev = sdata->dev;
3433
3434         if (!params->dont_wait_for_ack) {
3435                 /* make a copy to preserve the frame contents
3436                  * in case of encryption.
3437                  */
3438                 ack_skb = ieee80211_make_ack_skb(local, skb, cookie,
3439                                                  GFP_KERNEL);
3440                 if (IS_ERR(ack_skb)) {
3441                         ret = PTR_ERR(ack_skb);
3442                         kfree_skb(skb);
3443                         goto out_unlock;
3444                 }
3445         } else {
3446                 /* for cookie below */
3447                 ack_skb = skb;
3448         }
3449
3450         if (!need_offchan) {
3451                 ieee80211_tx_skb(sdata, skb);
3452                 ret = 0;
3453                 goto out_unlock;
3454         }
3455
3456         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_TX_OFFCHAN |
3457                                         IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
3458         if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
3459                 IEEE80211_SKB_CB(skb)->hw_queue =
3460                         local->hw.offchannel_tx_hw_queue;
3461
3462         /* This will handle all kinds of coalescing and immediate TX */
3463         ret = ieee80211_start_roc_work(local, sdata, params->chan,
3464                                        params->wait, cookie, skb,
3465                                        IEEE80211_ROC_TYPE_MGMT_TX);
3466         if (ret)
3467                 kfree_skb(skb);
3468  out_unlock:
3469         mutex_unlock(&local->mtx);
3470         return ret;
3471 }
3472
3473 static int ieee80211_mgmt_tx_cancel_wait(struct wiphy *wiphy,
3474                                          struct wireless_dev *wdev,
3475                                          u64 cookie)
3476 {
3477         struct ieee80211_local *local = wiphy_priv(wiphy);
3478
3479         return ieee80211_cancel_roc(local, cookie, true);
3480 }
3481
3482 static void ieee80211_mgmt_frame_register(struct wiphy *wiphy,
3483                                           struct wireless_dev *wdev,
3484                                           u16 frame_type, bool reg)
3485 {
3486         struct ieee80211_local *local = wiphy_priv(wiphy);
3487
3488         switch (frame_type) {
3489         case IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_PROBE_REQ:
3490                 if (reg)
3491                         local->probe_req_reg++;
3492                 else
3493                         local->probe_req_reg--;
3494
3495                 if (!local->open_count)
3496                         break;
3497
3498                 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
3499                 break;
3500         default:
3501                 break;
3502         }
3503 }
3504
3505 static int ieee80211_set_antenna(struct wiphy *wiphy, u32 tx_ant, u32 rx_ant)
3506 {
3507         struct ieee80211_local *local = wiphy_priv(wiphy);
3508
3509         if (local->started)
3510                 return -EOPNOTSUPP;
3511
3512         return drv_set_antenna(local, tx_ant, rx_ant);
3513 }
3514
3515 static int ieee80211_get_antenna(struct wiphy *wiphy, u32 *tx_ant, u32 *rx_ant)
3516 {
3517         struct ieee80211_local *local = wiphy_priv(wiphy);
3518
3519         return drv_get_antenna(local, tx_ant, rx_ant);
3520 }
3521
3522 static int ieee80211_set_rekey_data(struct wiphy *wiphy,
3523                                     struct net_device *dev,
3524                                     struct cfg80211_gtk_rekey_data *data)
3525 {
3526         struct ieee80211_local *local = wiphy_priv(wiphy);
3527         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3528
3529         if (!local->ops->set_rekey_data)
3530                 return -EOPNOTSUPP;
3531
3532         drv_set_rekey_data(local, sdata, data);
3533
3534         return 0;
3535 }
3536
3537 static int ieee80211_probe_client(struct wiphy *wiphy, struct net_device *dev,
3538                                   const u8 *peer, u64 *cookie)
3539 {
3540         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3541         struct ieee80211_local *local = sdata->local;
3542         struct ieee80211_qos_hdr *nullfunc;
3543         struct sk_buff *skb, *ack_skb;
3544         int size = sizeof(*nullfunc);
3545         __le16 fc;
3546         bool qos;
3547         struct ieee80211_tx_info *info;
3548         struct sta_info *sta;
3549         struct ieee80211_chanctx_conf *chanctx_conf;
3550         enum ieee80211_band band;
3551         int ret;
3552
3553         /* the lock is needed to assign the cookie later */
3554         mutex_lock(&local->mtx);
3555
3556         rcu_read_lock();
3557         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3558         if (WARN_ON(!chanctx_conf)) {
3559                 ret = -EINVAL;
3560                 goto unlock;
3561         }
3562         band = chanctx_conf->def.chan->band;
3563         sta = sta_info_get_bss(sdata, peer);
3564         if (sta) {
3565                 qos = sta->sta.wme;
3566         } else {
3567                 ret = -ENOLINK;
3568                 goto unlock;
3569         }
3570
3571         if (qos) {
3572                 fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
3573                                  IEEE80211_STYPE_QOS_NULLFUNC |
3574                                  IEEE80211_FCTL_FROMDS);
3575         } else {
3576                 size -= 2;
3577                 fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
3578                                  IEEE80211_STYPE_NULLFUNC |
3579                                  IEEE80211_FCTL_FROMDS);
3580         }
3581
3582         skb = dev_alloc_skb(local->hw.extra_tx_headroom + size);
3583         if (!skb) {
3584                 ret = -ENOMEM;
3585                 goto unlock;
3586         }
3587
3588         skb->dev = dev;
3589
3590         skb_reserve(skb, local->hw.extra_tx_headroom);
3591
3592         nullfunc = (void *) skb_put(skb, size);
3593         nullfunc->frame_control = fc;
3594         nullfunc->duration_id = 0;
3595         memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN);
3596         memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
3597         memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN);
3598         nullfunc->seq_ctrl = 0;
3599
3600         info = IEEE80211_SKB_CB(skb);
3601
3602         info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
3603                        IEEE80211_TX_INTFL_NL80211_FRAME_TX;
3604         info->band = band;
3605
3606         skb_set_queue_mapping(skb, IEEE80211_AC_VO);
3607         skb->priority = 7;
3608         if (qos)
3609                 nullfunc->qos_ctrl = cpu_to_le16(7);
3610
3611         ack_skb = ieee80211_make_ack_skb(local, skb, cookie, GFP_ATOMIC);
3612         if (IS_ERR(ack_skb)) {
3613                 kfree_skb(skb);
3614                 ret = PTR_ERR(ack_skb);
3615                 goto unlock;
3616         }
3617
3618         local_bh_disable();
3619         ieee80211_xmit(sdata, sta, skb);
3620         local_bh_enable();
3621
3622         ret = 0;
3623 unlock:
3624         rcu_read_unlock();
3625         mutex_unlock(&local->mtx);
3626
3627         return ret;
3628 }
3629
3630 static int ieee80211_cfg_get_channel(struct wiphy *wiphy,
3631                                      struct wireless_dev *wdev,
3632                                      struct cfg80211_chan_def *chandef)
3633 {
3634         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
3635         struct ieee80211_local *local = wiphy_priv(wiphy);
3636         struct ieee80211_chanctx_conf *chanctx_conf;
3637         int ret = -ENODATA;
3638
3639         rcu_read_lock();
3640         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3641         if (chanctx_conf) {
3642                 *chandef = sdata->vif.bss_conf.chandef;
3643                 ret = 0;
3644         } else if (local->open_count > 0 &&
3645                    local->open_count == local->monitors &&
3646                    sdata->vif.type == NL80211_IFTYPE_MONITOR) {
3647                 if (local->use_chanctx)
3648                         *chandef = local->monitor_chandef;
3649                 else
3650                         *chandef = local->_oper_chandef;
3651                 ret = 0;
3652         }
3653         rcu_read_unlock();
3654
3655         return ret;
3656 }
3657
3658 #ifdef CONFIG_PM
3659 static void ieee80211_set_wakeup(struct wiphy *wiphy, bool enabled)
3660 {
3661         drv_set_wakeup(wiphy_priv(wiphy), enabled);
3662 }
3663 #endif
3664
3665 static int ieee80211_set_qos_map(struct wiphy *wiphy,
3666                                  struct net_device *dev,
3667                                  struct cfg80211_qos_map *qos_map)
3668 {
3669         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3670         struct mac80211_qos_map *new_qos_map, *old_qos_map;
3671
3672         if (qos_map) {
3673                 new_qos_map = kzalloc(sizeof(*new_qos_map), GFP_KERNEL);
3674                 if (!new_qos_map)
3675                         return -ENOMEM;
3676                 memcpy(&new_qos_map->qos_map, qos_map, sizeof(*qos_map));
3677         } else {
3678                 /* A NULL qos_map was passed to disable QoS mapping */
3679                 new_qos_map = NULL;
3680         }
3681
3682         old_qos_map = sdata_dereference(sdata->qos_map, sdata);
3683         rcu_assign_pointer(sdata->qos_map, new_qos_map);
3684         if (old_qos_map)
3685                 kfree_rcu(old_qos_map, rcu_head);
3686
3687         return 0;
3688 }
3689
3690 static int ieee80211_set_ap_chanwidth(struct wiphy *wiphy,
3691                                       struct net_device *dev,
3692                                       struct cfg80211_chan_def *chandef)
3693 {
3694         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3695         int ret;
3696         u32 changed = 0;
3697
3698         ret = ieee80211_vif_change_bandwidth(sdata, chandef, &changed);
3699         if (ret == 0)
3700                 ieee80211_bss_info_change_notify(sdata, changed);
3701
3702         return ret;
3703 }
3704
3705 static int ieee80211_add_tx_ts(struct wiphy *wiphy, struct net_device *dev,
3706                                u8 tsid, const u8 *peer, u8 up,
3707                                u16 admitted_time)
3708 {
3709         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3710         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3711         int ac = ieee802_1d_to_ac[up];
3712
3713         if (sdata->vif.type != NL80211_IFTYPE_STATION)
3714                 return -EOPNOTSUPP;
3715
3716         if (!(sdata->wmm_acm & BIT(up)))
3717                 return -EINVAL;
3718
3719         if (ifmgd->tx_tspec[ac].admitted_time)
3720                 return -EBUSY;
3721
3722         if (admitted_time) {
3723                 ifmgd->tx_tspec[ac].admitted_time = 32 * admitted_time;
3724                 ifmgd->tx_tspec[ac].tsid = tsid;
3725                 ifmgd->tx_tspec[ac].up = up;
3726         }
3727
3728         return 0;
3729 }
3730
3731 static int ieee80211_del_tx_ts(struct wiphy *wiphy, struct net_device *dev,
3732                                u8 tsid, const u8 *peer)
3733 {
3734         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3735         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3736         struct ieee80211_local *local = wiphy_priv(wiphy);
3737         int ac;
3738
3739         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
3740                 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
3741
3742                 /* skip unused entries */
3743                 if (!tx_tspec->admitted_time)
3744                         continue;
3745
3746                 if (tx_tspec->tsid != tsid)
3747                         continue;
3748
3749                 /* due to this new packets will be reassigned to non-ACM ACs */
3750                 tx_tspec->up = -1;
3751
3752                 /* Make sure that all packets have been sent to avoid to
3753                  * restore the QoS params on packets that are still on the
3754                  * queues.
3755                  */
3756                 synchronize_net();
3757                 ieee80211_flush_queues(local, sdata, false);
3758
3759                 /* restore the normal QoS parameters
3760                  * (unconditionally to avoid races)
3761                  */
3762                 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
3763                 tx_tspec->downgraded = false;
3764                 ieee80211_sta_handle_tspec_ac_params(sdata);
3765
3766                 /* finally clear all the data */
3767                 memset(tx_tspec, 0, sizeof(*tx_tspec));
3768
3769                 return 0;
3770         }
3771
3772         return -ENOENT;
3773 }
3774
3775 const struct cfg80211_ops mac80211_config_ops = {
3776         .add_virtual_intf = ieee80211_add_iface,
3777         .del_virtual_intf = ieee80211_del_iface,
3778         .change_virtual_intf = ieee80211_change_iface,
3779         .start_p2p_device = ieee80211_start_p2p_device,
3780         .stop_p2p_device = ieee80211_stop_p2p_device,
3781         .add_key = ieee80211_add_key,
3782         .del_key = ieee80211_del_key,
3783         .get_key = ieee80211_get_key,
3784         .set_default_key = ieee80211_config_default_key,
3785         .set_default_mgmt_key = ieee80211_config_default_mgmt_key,
3786         .start_ap = ieee80211_start_ap,
3787         .change_beacon = ieee80211_change_beacon,
3788         .stop_ap = ieee80211_stop_ap,
3789         .add_station = ieee80211_add_station,
3790         .del_station = ieee80211_del_station,
3791         .change_station = ieee80211_change_station,
3792         .get_station = ieee80211_get_station,
3793         .dump_station = ieee80211_dump_station,
3794         .dump_survey = ieee80211_dump_survey,
3795 #ifdef CONFIG_MAC80211_MESH
3796         .add_mpath = ieee80211_add_mpath,
3797         .del_mpath = ieee80211_del_mpath,
3798         .change_mpath = ieee80211_change_mpath,
3799         .get_mpath = ieee80211_get_mpath,
3800         .dump_mpath = ieee80211_dump_mpath,
3801         .get_mpp = ieee80211_get_mpp,
3802         .dump_mpp = ieee80211_dump_mpp,
3803         .update_mesh_config = ieee80211_update_mesh_config,
3804         .get_mesh_config = ieee80211_get_mesh_config,
3805         .join_mesh = ieee80211_join_mesh,
3806         .leave_mesh = ieee80211_leave_mesh,
3807 #endif
3808         .join_ocb = ieee80211_join_ocb,
3809         .leave_ocb = ieee80211_leave_ocb,
3810         .change_bss = ieee80211_change_bss,
3811         .set_txq_params = ieee80211_set_txq_params,
3812         .set_monitor_channel = ieee80211_set_monitor_channel,
3813         .suspend = ieee80211_suspend,
3814         .resume = ieee80211_resume,
3815         .scan = ieee80211_scan,
3816         .sched_scan_start = ieee80211_sched_scan_start,
3817         .sched_scan_stop = ieee80211_sched_scan_stop,
3818         .auth = ieee80211_auth,
3819         .assoc = ieee80211_assoc,
3820         .deauth = ieee80211_deauth,
3821         .disassoc = ieee80211_disassoc,
3822         .join_ibss = ieee80211_join_ibss,
3823         .leave_ibss = ieee80211_leave_ibss,
3824         .set_mcast_rate = ieee80211_set_mcast_rate,
3825         .set_wiphy_params = ieee80211_set_wiphy_params,
3826         .set_tx_power = ieee80211_set_tx_power,
3827         .get_tx_power = ieee80211_get_tx_power,
3828         .set_wds_peer = ieee80211_set_wds_peer,
3829         .rfkill_poll = ieee80211_rfkill_poll,
3830         CFG80211_TESTMODE_CMD(ieee80211_testmode_cmd)
3831         CFG80211_TESTMODE_DUMP(ieee80211_testmode_dump)
3832         .set_power_mgmt = ieee80211_set_power_mgmt,
3833         .set_bitrate_mask = ieee80211_set_bitrate_mask,
3834         .remain_on_channel = ieee80211_remain_on_channel,
3835         .cancel_remain_on_channel = ieee80211_cancel_remain_on_channel,
3836         .mgmt_tx = ieee80211_mgmt_tx,
3837         .mgmt_tx_cancel_wait = ieee80211_mgmt_tx_cancel_wait,
3838         .set_cqm_rssi_config = ieee80211_set_cqm_rssi_config,
3839         .mgmt_frame_register = ieee80211_mgmt_frame_register,
3840         .set_antenna = ieee80211_set_antenna,
3841         .get_antenna = ieee80211_get_antenna,
3842         .set_rekey_data = ieee80211_set_rekey_data,
3843         .tdls_oper = ieee80211_tdls_oper,
3844         .tdls_mgmt = ieee80211_tdls_mgmt,
3845         .tdls_channel_switch = ieee80211_tdls_channel_switch,
3846         .tdls_cancel_channel_switch = ieee80211_tdls_cancel_channel_switch,
3847         .probe_client = ieee80211_probe_client,
3848         .set_noack_map = ieee80211_set_noack_map,
3849 #ifdef CONFIG_PM
3850         .set_wakeup = ieee80211_set_wakeup,
3851 #endif
3852         .get_channel = ieee80211_cfg_get_channel,
3853         .start_radar_detection = ieee80211_start_radar_detection,
3854         .channel_switch = ieee80211_channel_switch,
3855         .set_qos_map = ieee80211_set_qos_map,
3856         .set_ap_chanwidth = ieee80211_set_ap_chanwidth,
3857         .add_tx_ts = ieee80211_add_tx_ts,
3858         .del_tx_ts = ieee80211_del_tx_ts,
3859 };