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 "rate.h"
  21 #include "mesh.h"
  22 #include "wme.h"
  23
  24 static struct wireless_dev *ieee80211_add_iface(struct wiphy *wiphy,
  25                                                 const char *name,
  26                                                 unsigned char name_assign_type,
  27                                                 enum nl80211_iftype type,
  28                                                 u32 *flags,
  29                                                 struct vif_params *params)
  30 {
  31         struct ieee80211_local *local = wiphy_priv(wiphy);
  32         struct wireless_dev *wdev;
  33         struct ieee80211_sub_if_data *sdata;
  34         int err;
  35
  36         err = ieee80211_if_add(local, name, name_assign_type, &wdev, type, params);
  37         if (err)
  38                 return ERR_PTR(err);
  39
  40         if (type == NL80211_IFTYPE_MONITOR && flags) {
  41                 sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
  42                 sdata->u.mntr_flags = *flags;
  43         }
  44
  45         return wdev;
  46 }
  47
  48 static int ieee80211_del_iface(struct wiphy *wiphy, struct wireless_dev *wdev)
  49 {
  50         ieee80211_if_remove(IEEE80211_WDEV_TO_SUB_IF(wdev));
  51
  52         return 0;
  53 }
  54
  55 static int ieee80211_change_iface(struct wiphy *wiphy,
  56                                   struct net_device *dev,
  57                                   enum nl80211_iftype type, u32 *flags,
  58                                   struct vif_params *params)
  59 {
  60         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
  61         int ret;
  62
  63         ret = ieee80211_if_change_type(sdata, type);
  64         if (ret)
  65                 return ret;
  66
  67         if (type == NL80211_IFTYPE_AP_VLAN &&
  68             params && params->use_4addr == 0)
  69                 RCU_INIT_POINTER(sdata->u.vlan.sta, NULL);
  70         else if (type == NL80211_IFTYPE_STATION &&
  71                  params && params->use_4addr >= 0)
  72                 sdata->u.mgd.use_4addr = params->use_4addr;
  73
  74         if (sdata->vif.type == NL80211_IFTYPE_MONITOR && flags) {
  75                 struct ieee80211_local *local = sdata->local;
  76
  77                 if (ieee80211_sdata_running(sdata)) {
  78                         u32 mask = MONITOR_FLAG_COOK_FRAMES |
  79                                    MONITOR_FLAG_ACTIVE;
  80
  81                         /*
  82                          * Prohibit MONITOR_FLAG_COOK_FRAMES and
  83                          * MONITOR_FLAG_ACTIVE to be changed while the
  84                          * interface is up.
  85                          * Else we would need to add a lot of cruft
  86                          * to update everything:
  87                          *      cooked_mntrs, monitor and all fif_* counters
  88                          *      reconfigure hardware
  89                          */
  90                         if ((*flags & mask) != (sdata->u.mntr_flags & mask))
  91                                 return -EBUSY;
  92
  93                         ieee80211_adjust_monitor_flags(sdata, -1);
  94                         sdata->u.mntr_flags = *flags;
  95                         ieee80211_adjust_monitor_flags(sdata, 1);
  96
  97                         ieee80211_configure_filter(local);
  98                 } else {
  99                         /*
 100                          * Because the interface is down, ieee80211_do_stop
 101                          * and ieee80211_do_open take care of "everything"
 102                          * mentioned in the comment above.
 103                          */
 104                         sdata->u.mntr_flags = *flags;
 105                 }
 106         }
 107
 108         return 0;
 109 }
 110
 111 static int ieee80211_start_p2p_device(struct wiphy *wiphy,
 112                                       struct wireless_dev *wdev)
 113 {
 114         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
 115         int ret;
 116
 117         mutex_lock(&sdata->local->chanctx_mtx);
 118         ret = ieee80211_check_combinations(sdata, NULL, 0, 0);
 119         mutex_unlock(&sdata->local->chanctx_mtx);
 120         if (ret < 0)
 121                 return ret;
 122
 123         return ieee80211_do_open(wdev, true);
 124 }
 125
 126 static void ieee80211_stop_p2p_device(struct wiphy *wiphy,
 127                                       struct wireless_dev *wdev)
 128 {
 129         ieee80211_sdata_stop(IEEE80211_WDEV_TO_SUB_IF(wdev));
 130 }
 131
 132 static int ieee80211_set_noack_map(struct wiphy *wiphy,
 133                                   struct net_device *dev,
 134                                   u16 noack_map)
 135 {
 136         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 137
 138         sdata->noack_map = noack_map;
 139
 140         ieee80211_check_fast_xmit_iface(sdata);
 141
 142         return 0;
 143 }
 144
 145 static int ieee80211_add_key(struct wiphy *wiphy, struct net_device *dev,
 146                              u8 key_idx, bool pairwise, const u8 *mac_addr,
 147                              struct key_params *params)
 148 {
 149         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 150         struct ieee80211_local *local = sdata->local;
 151         struct sta_info *sta = NULL;
 152         const struct ieee80211_cipher_scheme *cs = NULL;
 153         struct ieee80211_key *key;
 154         int err;
 155
 156         if (!ieee80211_sdata_running(sdata))
 157                 return -ENETDOWN;
 158
 159         /* reject WEP and TKIP keys if WEP failed to initialize */
 160         switch (params->cipher) {
 161         case WLAN_CIPHER_SUITE_WEP40:
 162         case WLAN_CIPHER_SUITE_TKIP:
 163         case WLAN_CIPHER_SUITE_WEP104:
 164                 if (IS_ERR(local->wep_tx_tfm))
 165                         return -EINVAL;
 166                 break;
 167         case WLAN_CIPHER_SUITE_CCMP:
 168         case WLAN_CIPHER_SUITE_CCMP_256:
 169         case WLAN_CIPHER_SUITE_AES_CMAC:
 170         case WLAN_CIPHER_SUITE_BIP_CMAC_256:
 171         case WLAN_CIPHER_SUITE_BIP_GMAC_128:
 172         case WLAN_CIPHER_SUITE_BIP_GMAC_256:
 173         case WLAN_CIPHER_SUITE_GCMP:
 174         case WLAN_CIPHER_SUITE_GCMP_256:
 175                 break;
 176         default:
 177                 cs = ieee80211_cs_get(local, params->cipher, sdata->vif.type);
 178                 break;
 179         }
 180
 181         key = ieee80211_key_alloc(params->cipher, key_idx, params->key_len,
 182                                   params->key, params->seq_len, params->seq,
 183                                   cs);
 184         if (IS_ERR(key))
 185                 return PTR_ERR(key);
 186
 187         if (pairwise)
 188                 key->conf.flags |= IEEE80211_KEY_FLAG_PAIRWISE;
 189
 190         mutex_lock(&local->sta_mtx);
 191
 192         if (mac_addr) {
 193                 if (ieee80211_vif_is_mesh(&sdata->vif))
 194                         sta = sta_info_get(sdata, mac_addr);
 195                 else
 196                         sta = sta_info_get_bss(sdata, mac_addr);
 197                 /*
 198                  * The ASSOC test makes sure the driver is ready to
 199                  * receive the key. When wpa_supplicant has roamed
 200                  * using FT, it attempts to set the key before
 201                  * association has completed, this rejects that attempt
 202                  * so it will set the key again after association.
 203                  *
 204                  * TODO: accept the key if we have a station entry and
 205                  *       add it to the device after the station.
 206                  */
 207                 if (!sta || !test_sta_flag(sta, WLAN_STA_ASSOC)) {
 208                         ieee80211_key_free_unused(key);
 209                         err = -ENOENT;
 210                         goto out_unlock;
 211                 }
 212         }
 213
 214         switch (sdata->vif.type) {
 215         case NL80211_IFTYPE_STATION:
 216                 if (sdata->u.mgd.mfp != IEEE80211_MFP_DISABLED)
 217                         key->conf.flags |= IEEE80211_KEY_FLAG_RX_MGMT;
 218                 break;
 219         case NL80211_IFTYPE_AP:
 220         case NL80211_IFTYPE_AP_VLAN:
 221                 /* Keys without a station are used for TX only */
 222                 if (key->sta && test_sta_flag(key->sta, WLAN_STA_MFP))
 223                         key->conf.flags |= IEEE80211_KEY_FLAG_RX_MGMT;
 224                 break;
 225         case NL80211_IFTYPE_ADHOC:
 226                 /* no MFP (yet) */
 227                 break;
 228         case NL80211_IFTYPE_MESH_POINT:
 229 #ifdef CONFIG_MAC80211_MESH
 230                 if (sdata->u.mesh.security != IEEE80211_MESH_SEC_NONE)
 231                         key->conf.flags |= IEEE80211_KEY_FLAG_RX_MGMT;
 232                 break;
 233 #endif
 234         case NL80211_IFTYPE_WDS:
 235         case NL80211_IFTYPE_MONITOR:
 236         case NL80211_IFTYPE_P2P_DEVICE:
 237         case NL80211_IFTYPE_UNSPECIFIED:
 238         case NUM_NL80211_IFTYPES:
 239         case NL80211_IFTYPE_P2P_CLIENT:
 240         case NL80211_IFTYPE_P2P_GO:
 241         case NL80211_IFTYPE_OCB:
 242                 /* shouldn't happen */
 243                 WARN_ON_ONCE(1);
 244                 break;
 245         }
 246
 247         if (sta)
 248                 sta->cipher_scheme = cs;
 249
 250         err = ieee80211_key_link(key, sdata, sta);
 251
 252  out_unlock:
 253         mutex_unlock(&local->sta_mtx);
 254
 255         return err;
 256 }
 257
 258 static int ieee80211_del_key(struct wiphy *wiphy, struct net_device *dev,
 259                              u8 key_idx, bool pairwise, const u8 *mac_addr)
 260 {
 261         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 262         struct ieee80211_local *local = sdata->local;
 263         struct sta_info *sta;
 264         struct ieee80211_key *key = NULL;
 265         int ret;
 266
 267         mutex_lock(&local->sta_mtx);
 268         mutex_lock(&local->key_mtx);
 269
 270         if (mac_addr) {
 271                 ret = -ENOENT;
 272
 273                 sta = sta_info_get_bss(sdata, mac_addr);
 274                 if (!sta)
 275                         goto out_unlock;
 276
 277                 if (pairwise)
 278                         key = key_mtx_dereference(local, sta->ptk[key_idx]);
 279                 else
 280                         key = key_mtx_dereference(local, sta->gtk[key_idx]);
 281         } else
 282                 key = key_mtx_dereference(local, sdata->keys[key_idx]);
 283
 284         if (!key) {
 285                 ret = -ENOENT;
 286                 goto out_unlock;
 287         }
 288
 289         ieee80211_key_free(key, true);
 290
 291         ret = 0;
 292  out_unlock:
 293         mutex_unlock(&local->key_mtx);
 294         mutex_unlock(&local->sta_mtx);
 295
 296         return ret;
 297 }
 298
 299 static int ieee80211_get_key(struct wiphy *wiphy, struct net_device *dev,
 300                              u8 key_idx, bool pairwise, const u8 *mac_addr,
 301                              void *cookie,
 302                              void (*callback)(void *cookie,
 303                                               struct key_params *params))
 304 {
 305         struct ieee80211_sub_if_data *sdata;
 306         struct sta_info *sta = NULL;
 307         u8 seq[6] = {0};
 308         struct key_params params;
 309         struct ieee80211_key *key = NULL;
 310         u64 pn64;
 311         u32 iv32;
 312         u16 iv16;
 313         int err = -ENOENT;
 314         struct ieee80211_key_seq kseq = {};
 315
 316         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 317
 318         rcu_read_lock();
 319
 320         if (mac_addr) {
 321                 sta = sta_info_get_bss(sdata, mac_addr);
 322                 if (!sta)
 323                         goto out;
 324
 325                 if (pairwise && key_idx < NUM_DEFAULT_KEYS)
 326                         key = rcu_dereference(sta->ptk[key_idx]);
 327                 else if (!pairwise &&
 328                          key_idx < NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS)
 329                         key = rcu_dereference(sta->gtk[key_idx]);
 330         } else
 331                 key = rcu_dereference(sdata->keys[key_idx]);
 332
 333         if (!key)
 334                 goto out;
 335
 336         memset(&params, 0, sizeof(params));
 337
 338         params.cipher = key->conf.cipher;
 339
 340         switch (key->conf.cipher) {
 341         case WLAN_CIPHER_SUITE_TKIP:
 342                 iv32 = key->u.tkip.tx.iv32;
 343                 iv16 = key->u.tkip.tx.iv16;
 344
 345                 if (key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE &&
 346                     !(key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV)) {
 347                         drv_get_key_seq(sdata->local, key, &kseq);
 348                         iv32 = kseq.tkip.iv32;
 349                         iv16 = kseq.tkip.iv16;
 350                 }
 351
 352                 seq[0] = iv16 & 0xff;
 353                 seq[1] = (iv16 >> 8) & 0xff;
 354                 seq[2] = iv32 & 0xff;
 355                 seq[3] = (iv32 >> 8) & 0xff;
 356                 seq[4] = (iv32 >> 16) & 0xff;
 357                 seq[5] = (iv32 >> 24) & 0xff;
 358                 params.seq = seq;
 359                 params.seq_len = 6;
 360                 break;
 361         case WLAN_CIPHER_SUITE_CCMP:
 362         case WLAN_CIPHER_SUITE_CCMP_256:
 363         case WLAN_CIPHER_SUITE_AES_CMAC:
 364         case WLAN_CIPHER_SUITE_BIP_CMAC_256:
 365                 BUILD_BUG_ON(offsetof(typeof(kseq), ccmp) !=
 366                              offsetof(typeof(kseq), aes_cmac));
 367         case WLAN_CIPHER_SUITE_BIP_GMAC_128:
 368         case WLAN_CIPHER_SUITE_BIP_GMAC_256:
 369                 BUILD_BUG_ON(offsetof(typeof(kseq), ccmp) !=
 370                              offsetof(typeof(kseq), aes_gmac));
 371         case WLAN_CIPHER_SUITE_GCMP:
 372         case WLAN_CIPHER_SUITE_GCMP_256:
 373                 BUILD_BUG_ON(offsetof(typeof(kseq), ccmp) !=
 374                              offsetof(typeof(kseq), gcmp));
 375
 376                 if (key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE &&
 377                     !(key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV)) {
 378                         drv_get_key_seq(sdata->local, key, &kseq);
 379                         memcpy(seq, kseq.ccmp.pn, 6);
 380                 } else {
 381                         pn64 = atomic64_read(&key->conf.tx_pn);
 382                         seq[0] = pn64;
 383                         seq[1] = pn64 >> 8;
 384                         seq[2] = pn64 >> 16;
 385                         seq[3] = pn64 >> 24;
 386                         seq[4] = pn64 >> 32;
 387                         seq[5] = pn64 >> 40;
 388                 }
 389                 params.seq = seq;
 390                 params.seq_len = 6;
 391                 break;
 392         default:
 393                 if (!(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
 394                         break;
 395                 if (WARN_ON(key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV))
 396                         break;
 397                 drv_get_key_seq(sdata->local, key, &kseq);
 398                 params.seq = kseq.hw.seq;
 399                 params.seq_len = kseq.hw.seq_len;
 400                 break;
 401         }
 402
 403         params.key = key->conf.key;
 404         params.key_len = key->conf.keylen;
 405
 406         callback(cookie, &params);
 407         err = 0;
 408
 409  out:
 410         rcu_read_unlock();
 411         return err;
 412 }
 413
 414 static int ieee80211_config_default_key(struct wiphy *wiphy,
 415                                         struct net_device *dev,
 416                                         u8 key_idx, bool uni,
 417                                         bool multi)
 418 {
 419         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 420
 421         ieee80211_set_default_key(sdata, key_idx, uni, multi);
 422
 423         return 0;
 424 }
 425
 426 static int ieee80211_config_default_mgmt_key(struct wiphy *wiphy,
 427                                              struct net_device *dev,
 428                                              u8 key_idx)
 429 {
 430         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 431
 432         ieee80211_set_default_mgmt_key(sdata, key_idx);
 433
 434         return 0;
 435 }
 436
 437 void sta_set_rate_info_tx(struct sta_info *sta,
 438                           const struct ieee80211_tx_rate *rate,
 439                           struct rate_info *rinfo)
 440 {
 441         rinfo->flags = 0;
 442         if (rate->flags & IEEE80211_TX_RC_MCS) {
 443                 rinfo->flags |= RATE_INFO_FLAGS_MCS;
 444                 rinfo->mcs = rate->idx;
 445         } else if (rate->flags & IEEE80211_TX_RC_VHT_MCS) {
 446                 rinfo->flags |= RATE_INFO_FLAGS_VHT_MCS;
 447                 rinfo->mcs = ieee80211_rate_get_vht_mcs(rate);
 448                 rinfo->nss = ieee80211_rate_get_vht_nss(rate);
 449         } else {
 450                 struct ieee80211_supported_band *sband;
 451                 int shift = ieee80211_vif_get_shift(&sta->sdata->vif);
 452                 u16 brate;
 453
 454                 sband = sta->local->hw.wiphy->bands[
 455                                 ieee80211_get_sdata_band(sta->sdata)];
 456                 brate = sband->bitrates[rate->idx].bitrate;
 457                 rinfo->legacy = DIV_ROUND_UP(brate, 1 << shift);
 458         }
 459         if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
 460                 rinfo->bw = RATE_INFO_BW_40;
 461         else if (rate->flags & IEEE80211_TX_RC_80_MHZ_WIDTH)
 462                 rinfo->bw = RATE_INFO_BW_80;
 463         else if (rate->flags & IEEE80211_TX_RC_160_MHZ_WIDTH)
 464                 rinfo->bw = RATE_INFO_BW_160;
 465         else
 466                 rinfo->bw = RATE_INFO_BW_20;
 467         if (rate->flags & IEEE80211_TX_RC_SHORT_GI)
 468                 rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI;
 469 }
 470
 471 static int ieee80211_dump_station(struct wiphy *wiphy, struct net_device *dev,
 472                                   int idx, u8 *mac, struct station_info *sinfo)
 473 {
 474         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 475         struct ieee80211_local *local = sdata->local;
 476         struct sta_info *sta;
 477         int ret = -ENOENT;
 478
 479         mutex_lock(&local->sta_mtx);
 480
 481         sta = sta_info_get_by_idx(sdata, idx);
 482         if (sta) {
 483                 ret = 0;
 484                 memcpy(mac, sta->sta.addr, ETH_ALEN);
 485                 sta_set_sinfo(sta, sinfo);
 486         }
 487
 488         mutex_unlock(&local->sta_mtx);
 489
 490         return ret;
 491 }
 492
 493 static int ieee80211_dump_survey(struct wiphy *wiphy, struct net_device *dev,
 494                                  int idx, struct survey_info *survey)
 495 {
 496         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 497
 498         return drv_get_survey(local, idx, survey);
 499 }
 500
 501 static int ieee80211_get_station(struct wiphy *wiphy, struct net_device *dev,
 502                                  const u8 *mac, struct station_info *sinfo)
 503 {
 504         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 505         struct ieee80211_local *local = sdata->local;
 506         struct sta_info *sta;
 507         int ret = -ENOENT;
 508
 509         mutex_lock(&local->sta_mtx);
 510
 511         sta = sta_info_get_bss(sdata, mac);
 512         if (sta) {
 513                 ret = 0;
 514                 sta_set_sinfo(sta, sinfo);
 515         }
 516
 517         mutex_unlock(&local->sta_mtx);
 518
 519         return ret;
 520 }
 521
 522 static int ieee80211_set_monitor_channel(struct wiphy *wiphy,
 523                                          struct cfg80211_chan_def *chandef)
 524 {
 525         struct ieee80211_local *local = wiphy_priv(wiphy);
 526         struct ieee80211_sub_if_data *sdata;
 527         int ret = 0;
 528
 529         if (cfg80211_chandef_identical(&local->monitor_chandef, chandef))
 530                 return 0;
 531
 532         mutex_lock(&local->mtx);
 533         mutex_lock(&local->iflist_mtx);
 534         if (local->use_chanctx) {
 535                 sdata = rcu_dereference_protected(
 536                                 local->monitor_sdata,
 537                                 lockdep_is_held(&local->iflist_mtx));
 538                 if (sdata) {
 539                         ieee80211_vif_release_channel(sdata);
 540                         ret = ieee80211_vif_use_channel(sdata, chandef,
 541                                         IEEE80211_CHANCTX_EXCLUSIVE);
 542                 }
 543         } else if (local->open_count == local->monitors) {
 544                 local->_oper_chandef = *chandef;
 545                 ieee80211_hw_config(local, 0);
 546         }
 547
 548         if (ret == 0)
 549                 local->monitor_chandef = *chandef;
 550         mutex_unlock(&local->iflist_mtx);
 551         mutex_unlock(&local->mtx);
 552
 553         return ret;
 554 }
 555
 556 static int ieee80211_set_probe_resp(struct ieee80211_sub_if_data *sdata,
 557                                     const u8 *resp, size_t resp_len,
 558                                     const struct ieee80211_csa_settings *csa)
 559 {
 560         struct probe_resp *new, *old;
 561
 562         if (!resp || !resp_len)
 563                 return 1;
 564
 565         old = sdata_dereference(sdata->u.ap.probe_resp, sdata);
 566
 567         new = kzalloc(sizeof(struct probe_resp) + resp_len, GFP_KERNEL);
 568         if (!new)
 569                 return -ENOMEM;
 570
 571         new->len = resp_len;
 572         memcpy(new->data, resp, resp_len);
 573
 574         if (csa)
 575                 memcpy(new->csa_counter_offsets, csa->counter_offsets_presp,
 576                        csa->n_counter_offsets_presp *
 577                        sizeof(new->csa_counter_offsets[0]));
 578
 579         rcu_assign_pointer(sdata->u.ap.probe_resp, new);
 580         if (old)
 581                 kfree_rcu(old, rcu_head);
 582
 583         return 0;
 584 }
 585
 586 static int ieee80211_assign_beacon(struct ieee80211_sub_if_data *sdata,
 587                                    struct cfg80211_beacon_data *params,
 588                                    const struct ieee80211_csa_settings *csa)
 589 {
 590         struct beacon_data *new, *old;
 591         int new_head_len, new_tail_len;
 592         int size, err;
 593         u32 changed = BSS_CHANGED_BEACON;
 594
 595         old = sdata_dereference(sdata->u.ap.beacon, sdata);
 596
 597
 598         /* Need to have a beacon head if we don't have one yet */
 599         if (!params->head && !old)
 600                 return -EINVAL;
 601
 602         /* new or old head? */
 603         if (params->head)
 604                 new_head_len = params->head_len;
 605         else
 606                 new_head_len = old->head_len;
 607
 608         /* new or old tail? */
 609         if (params->tail || !old)
 610                 /* params->tail_len will be zero for !params->tail */
 611                 new_tail_len = params->tail_len;
 612         else
 613                 new_tail_len = old->tail_len;
 614
 615         size = sizeof(*new) + new_head_len + new_tail_len;
 616
 617         new = kzalloc(size, GFP_KERNEL);
 618         if (!new)
 619                 return -ENOMEM;
 620
 621         /* start filling the new info now */
 622
 623         /*
 624          * pointers go into the block we allocated,
 625          * memory is | beacon_data | head | tail |
 626          */
 627         new->head = ((u8 *) new) + sizeof(*new);
 628         new->tail = new->head + new_head_len;
 629         new->head_len = new_head_len;
 630         new->tail_len = new_tail_len;
 631
 632         if (csa) {
 633                 new->csa_current_counter = csa->count;
 634                 memcpy(new->csa_counter_offsets, csa->counter_offsets_beacon,
 635                        csa->n_counter_offsets_beacon *
 636                        sizeof(new->csa_counter_offsets[0]));
 637         }
 638
 639         /* copy in head */
 640         if (params->head)
 641                 memcpy(new->head, params->head, new_head_len);
 642         else
 643                 memcpy(new->head, old->head, new_head_len);
 644
 645         /* copy in optional tail */
 646         if (params->tail)
 647                 memcpy(new->tail, params->tail, new_tail_len);
 648         else
 649                 if (old)
 650                         memcpy(new->tail, old->tail, new_tail_len);
 651
 652         err = ieee80211_set_probe_resp(sdata, params->probe_resp,
 653                                        params->probe_resp_len, csa);
 654         if (err < 0)
 655                 return err;
 656         if (err == 0)
 657                 changed |= BSS_CHANGED_AP_PROBE_RESP;
 658
 659         rcu_assign_pointer(sdata->u.ap.beacon, new);
 660
 661         if (old)
 662                 kfree_rcu(old, rcu_head);
 663
 664         return changed;
 665 }
 666
 667 static int ieee80211_start_ap(struct wiphy *wiphy, struct net_device *dev,
 668                               struct cfg80211_ap_settings *params)
 669 {
 670         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 671         struct ieee80211_local *local = sdata->local;
 672         struct beacon_data *old;
 673         struct ieee80211_sub_if_data *vlan;
 674         u32 changed = BSS_CHANGED_BEACON_INT |
 675                       BSS_CHANGED_BEACON_ENABLED |
 676                       BSS_CHANGED_BEACON |
 677                       BSS_CHANGED_SSID |
 678                       BSS_CHANGED_P2P_PS |
 679                       BSS_CHANGED_TXPOWER;
 680         int err;
 681
 682         old = sdata_dereference(sdata->u.ap.beacon, sdata);
 683         if (old)
 684                 return -EALREADY;
 685
 686         switch (params->smps_mode) {
 687         case NL80211_SMPS_OFF:
 688                 sdata->smps_mode = IEEE80211_SMPS_OFF;
 689                 break;
 690         case NL80211_SMPS_STATIC:
 691                 sdata->smps_mode = IEEE80211_SMPS_STATIC;
 692                 break;
 693         case NL80211_SMPS_DYNAMIC:
 694                 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
 695                 break;
 696         default:
 697                 return -EINVAL;
 698         }
 699         sdata->needed_rx_chains = sdata->local->rx_chains;
 700
 701         mutex_lock(&local->mtx);
 702         err = ieee80211_vif_use_channel(sdata, &params->chandef,
 703                                         IEEE80211_CHANCTX_SHARED);
 704         if (!err)
 705                 ieee80211_vif_copy_chanctx_to_vlans(sdata, false);
 706         mutex_unlock(&local->mtx);
 707         if (err)
 708                 return err;
 709
 710         /*
 711          * Apply control port protocol, this allows us to
 712          * not encrypt dynamic WEP control frames.
 713          */
 714         sdata->control_port_protocol = params->crypto.control_port_ethertype;
 715         sdata->control_port_no_encrypt = params->crypto.control_port_no_encrypt;
 716         sdata->encrypt_headroom = ieee80211_cs_headroom(sdata->local,
 717                                                         &params->crypto,
 718                                                         sdata->vif.type);
 719
 720         list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list) {
 721                 vlan->control_port_protocol =
 722                         params->crypto.control_port_ethertype;
 723                 vlan->control_port_no_encrypt =
 724                         params->crypto.control_port_no_encrypt;
 725                 vlan->encrypt_headroom =
 726                         ieee80211_cs_headroom(sdata->local,
 727                                               &params->crypto,
 728                                               vlan->vif.type);
 729         }
 730
 731         sdata->vif.bss_conf.beacon_int = params->beacon_interval;
 732         sdata->vif.bss_conf.dtim_period = params->dtim_period;
 733         sdata->vif.bss_conf.enable_beacon = true;
 734
 735         sdata->vif.bss_conf.ssid_len = params->ssid_len;
 736         if (params->ssid_len)
 737                 memcpy(sdata->vif.bss_conf.ssid, params->ssid,
 738                        params->ssid_len);
 739         sdata->vif.bss_conf.hidden_ssid =
 740                 (params->hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE);
 741
 742         memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
 743                sizeof(sdata->vif.bss_conf.p2p_noa_attr));
 744         sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow =
 745                 params->p2p_ctwindow & IEEE80211_P2P_OPPPS_CTWINDOW_MASK;
 746         if (params->p2p_opp_ps)
 747                 sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow |=
 748                                         IEEE80211_P2P_OPPPS_ENABLE_BIT;
 749
 750         err = ieee80211_assign_beacon(sdata, &params->beacon, NULL);
 751         if (err < 0) {
 752                 ieee80211_vif_release_channel(sdata);
 753                 return err;
 754         }
 755         changed |= err;
 756
 757         err = drv_start_ap(sdata->local, sdata);
 758         if (err) {
 759                 old = sdata_dereference(sdata->u.ap.beacon, sdata);
 760
 761                 if (old)
 762                         kfree_rcu(old, rcu_head);
 763                 RCU_INIT_POINTER(sdata->u.ap.beacon, NULL);
 764                 ieee80211_vif_release_channel(sdata);
 765                 return err;
 766         }
 767
 768         ieee80211_recalc_dtim(local, sdata);
 769         ieee80211_bss_info_change_notify(sdata, changed);
 770
 771         netif_carrier_on(dev);
 772         list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list)
 773                 netif_carrier_on(vlan->dev);
 774
 775         return 0;
 776 }
 777
 778 static int ieee80211_change_beacon(struct wiphy *wiphy, struct net_device *dev,
 779                                    struct cfg80211_beacon_data *params)
 780 {
 781         struct ieee80211_sub_if_data *sdata;
 782         struct beacon_data *old;
 783         int err;
 784
 785         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 786         sdata_assert_lock(sdata);
 787
 788         /* don't allow changing the beacon while CSA is in place - offset
 789          * of channel switch counter may change
 790          */
 791         if (sdata->vif.csa_active)
 792                 return -EBUSY;
 793
 794         old = sdata_dereference(sdata->u.ap.beacon, sdata);
 795         if (!old)
 796                 return -ENOENT;
 797
 798         err = ieee80211_assign_beacon(sdata, params, NULL);
 799         if (err < 0)
 800                 return err;
 801         ieee80211_bss_info_change_notify(sdata, err);
 802         return 0;
 803 }
 804
 805 static int ieee80211_stop_ap(struct wiphy *wiphy, struct net_device *dev)
 806 {
 807         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 808         struct ieee80211_sub_if_data *vlan;
 809         struct ieee80211_local *local = sdata->local;
 810         struct beacon_data *old_beacon;
 811         struct probe_resp *old_probe_resp;
 812         struct cfg80211_chan_def chandef;
 813
 814         sdata_assert_lock(sdata);
 815
 816         old_beacon = sdata_dereference(sdata->u.ap.beacon, sdata);
 817         if (!old_beacon)
 818                 return -ENOENT;
 819         old_probe_resp = sdata_dereference(sdata->u.ap.probe_resp, sdata);
 820
 821         /* abort any running channel switch */
 822         mutex_lock(&local->mtx);
 823         sdata->vif.csa_active = false;
 824         if (sdata->csa_block_tx) {
 825                 ieee80211_wake_vif_queues(local, sdata,
 826                                           IEEE80211_QUEUE_STOP_REASON_CSA);
 827                 sdata->csa_block_tx = false;
 828         }
 829
 830         mutex_unlock(&local->mtx);
 831
 832         kfree(sdata->u.ap.next_beacon);
 833         sdata->u.ap.next_beacon = NULL;
 834
 835         /* turn off carrier for this interface and dependent VLANs */
 836         list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list)
 837                 netif_carrier_off(vlan->dev);
 838         netif_carrier_off(dev);
 839
 840         /* remove beacon and probe response */
 841         RCU_INIT_POINTER(sdata->u.ap.beacon, NULL);
 842         RCU_INIT_POINTER(sdata->u.ap.probe_resp, NULL);
 843         kfree_rcu(old_beacon, rcu_head);
 844         if (old_probe_resp)
 845                 kfree_rcu(old_probe_resp, rcu_head);
 846         sdata->u.ap.driver_smps_mode = IEEE80211_SMPS_OFF;
 847
 848         __sta_info_flush(sdata, true);
 849         ieee80211_free_keys(sdata, true);
 850
 851         sdata->vif.bss_conf.enable_beacon = false;
 852         sdata->vif.bss_conf.ssid_len = 0;
 853         clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state);
 854         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED);
 855
 856         if (sdata->wdev.cac_started) {
 857                 chandef = sdata->vif.bss_conf.chandef;
 858                 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
 859                 cfg80211_cac_event(sdata->dev, &chandef,
 860                                    NL80211_RADAR_CAC_ABORTED,
 861                                    GFP_KERNEL);
 862         }
 863
 864         drv_stop_ap(sdata->local, sdata);
 865
 866         /* free all potentially still buffered bcast frames */
 867         local->total_ps_buffered -= skb_queue_len(&sdata->u.ap.ps.bc_buf);
 868         skb_queue_purge(&sdata->u.ap.ps.bc_buf);
 869
 870         mutex_lock(&local->mtx);
 871         ieee80211_vif_copy_chanctx_to_vlans(sdata, true);
 872         ieee80211_vif_release_channel(sdata);
 873         mutex_unlock(&local->mtx);
 874
 875         return 0;
 876 }
 877
 878 /* Layer 2 Update frame (802.2 Type 1 LLC XID Update response) */
 879 struct iapp_layer2_update {
 880         u8 da[ETH_ALEN];        /* broadcast */
 881         u8 sa[ETH_ALEN];        /* STA addr */
 882         __be16 len;             /* 6 */
 883         u8 dsap;                /* 0 */
 884         u8 ssap;                /* 0 */
 885         u8 control;
 886         u8 xid_info[3];
 887 } __packed;
 888
 889 static void ieee80211_send_layer2_update(struct sta_info *sta)
 890 {
 891         struct iapp_layer2_update *msg;
 892         struct sk_buff *skb;
 893
 894         /* Send Level 2 Update Frame to update forwarding tables in layer 2
 895          * bridge devices */
 896
 897         skb = dev_alloc_skb(sizeof(*msg));
 898         if (!skb)
 899                 return;
 900         msg = (struct iapp_layer2_update *)skb_put(skb, sizeof(*msg));
 901
 902         /* 802.2 Type 1 Logical Link Control (LLC) Exchange Identifier (XID)
 903          * Update response frame; IEEE Std 802.2-1998, 5.4.1.2.1 */
 904
 905         eth_broadcast_addr(msg->da);
 906         memcpy(msg->sa, sta->sta.addr, ETH_ALEN);
 907         msg->len = htons(6);
 908         msg->dsap = 0;
 909         msg->ssap = 0x01;       /* NULL LSAP, CR Bit: Response */
 910         msg->control = 0xaf;    /* XID response lsb.1111F101.
 911                                  * F=0 (no poll command; unsolicited frame) */
 912         msg->xid_info[0] = 0x81;        /* XID format identifier */
 913         msg->xid_info[1] = 1;   /* LLC types/classes: Type 1 LLC */
 914         msg->xid_info[2] = 0;   /* XID sender's receive window size (RW) */
 915
 916         skb->dev = sta->sdata->dev;
 917         skb->protocol = eth_type_trans(skb, sta->sdata->dev);
 918         memset(skb->cb, 0, sizeof(skb->cb));
 919         netif_rx_ni(skb);
 920 }
 921
 922 static int sta_apply_auth_flags(struct ieee80211_local *local,
 923                                 struct sta_info *sta,
 924                                 u32 mask, u32 set)
 925 {
 926         int ret;
 927
 928         if (mask & BIT(NL80211_STA_FLAG_AUTHENTICATED) &&
 929             set & BIT(NL80211_STA_FLAG_AUTHENTICATED) &&
 930             !test_sta_flag(sta, WLAN_STA_AUTH)) {
 931                 ret = sta_info_move_state(sta, IEEE80211_STA_AUTH);
 932                 if (ret)
 933                         return ret;
 934         }
 935
 936         if (mask & BIT(NL80211_STA_FLAG_ASSOCIATED) &&
 937             set & BIT(NL80211_STA_FLAG_ASSOCIATED) &&
 938             !test_sta_flag(sta, WLAN_STA_ASSOC)) {
 939                 /*
 940                  * When peer becomes associated, init rate control as
 941                  * well. Some drivers require rate control initialized
 942                  * before drv_sta_state() is called.
 943                  */
 944                 if (!test_sta_flag(sta, WLAN_STA_RATE_CONTROL))
 945                         rate_control_rate_init(sta);
 946
 947                 ret = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
 948                 if (ret)
 949                         return ret;
 950         }
 951
 952         if (mask & BIT(NL80211_STA_FLAG_AUTHORIZED)) {
 953                 if (set & BIT(NL80211_STA_FLAG_AUTHORIZED))
 954                         ret = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
 955                 else if (test_sta_flag(sta, WLAN_STA_AUTHORIZED))
 956                         ret = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
 957                 else
 958                         ret = 0;
 959                 if (ret)
 960                         return ret;
 961         }
 962
 963         if (mask & BIT(NL80211_STA_FLAG_ASSOCIATED) &&
 964             !(set & BIT(NL80211_STA_FLAG_ASSOCIATED)) &&
 965             test_sta_flag(sta, WLAN_STA_ASSOC)) {
 966                 ret = sta_info_move_state(sta, IEEE80211_STA_AUTH);
 967                 if (ret)
 968                         return ret;
 969         }
 970
 971         if (mask & BIT(NL80211_STA_FLAG_AUTHENTICATED) &&
 972             !(set & BIT(NL80211_STA_FLAG_AUTHENTICATED)) &&
 973             test_sta_flag(sta, WLAN_STA_AUTH)) {
 974                 ret = sta_info_move_state(sta, IEEE80211_STA_NONE);
 975                 if (ret)
 976                         return ret;
 977         }
 978
 979         return 0;
 980 }
 981
 982 static void sta_apply_mesh_params(struct ieee80211_local *local,
 983                                   struct sta_info *sta,
 984                                   struct station_parameters *params)
 985 {
 986 #ifdef CONFIG_MAC80211_MESH
 987         struct ieee80211_sub_if_data *sdata = sta->sdata;
 988         u32 changed = 0;
 989
 990         if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE) {
 991                 switch (params->plink_state) {
 992                 case NL80211_PLINK_ESTAB:
 993                         if (sta->mesh->plink_state != NL80211_PLINK_ESTAB)
 994                                 changed = mesh_plink_inc_estab_count(sdata);
 995                         sta->mesh->plink_state = params->plink_state;
 996
 997                         ieee80211_mps_sta_status_update(sta);
 998                         changed |= ieee80211_mps_set_sta_local_pm(sta,
 999                                       sdata->u.mesh.mshcfg.power_mode);
1000                         break;
1001                 case NL80211_PLINK_LISTEN:
1002                 case NL80211_PLINK_BLOCKED:
1003                 case NL80211_PLINK_OPN_SNT:
1004                 case NL80211_PLINK_OPN_RCVD:
1005                 case NL80211_PLINK_CNF_RCVD:
1006                 case NL80211_PLINK_HOLDING:
1007                         if (sta->mesh->plink_state == NL80211_PLINK_ESTAB)
1008                                 changed = mesh_plink_dec_estab_count(sdata);
1009                         sta->mesh->plink_state = params->plink_state;
1010
1011                         ieee80211_mps_sta_status_update(sta);
1012                         changed |= ieee80211_mps_set_sta_local_pm(sta,
1013                                         NL80211_MESH_POWER_UNKNOWN);
1014                         break;
1015                 default:
1016                         /*  nothing  */
1017                         break;
1018                 }
1019         }
1020
1021         switch (params->plink_action) {
1022         case NL80211_PLINK_ACTION_NO_ACTION:
1023                 /* nothing */
1024                 break;
1025         case NL80211_PLINK_ACTION_OPEN:
1026                 changed |= mesh_plink_open(sta);
1027                 break;
1028         case NL80211_PLINK_ACTION_BLOCK:
1029                 changed |= mesh_plink_block(sta);
1030                 break;
1031         }
1032
1033         if (params->local_pm)
1034                 changed |= ieee80211_mps_set_sta_local_pm(sta,
1035                                                           params->local_pm);
1036
1037         ieee80211_mbss_info_change_notify(sdata, changed);
1038 #endif
1039 }
1040
1041 static int sta_apply_parameters(struct ieee80211_local *local,
1042                                 struct sta_info *sta,
1043                                 struct station_parameters *params)
1044 {
1045         int ret = 0;
1046         struct ieee80211_supported_band *sband;
1047         struct ieee80211_sub_if_data *sdata = sta->sdata;
1048         enum ieee80211_band band = ieee80211_get_sdata_band(sdata);
1049         u32 mask, set;
1050
1051         sband = local->hw.wiphy->bands[band];
1052
1053         mask = params->sta_flags_mask;
1054         set = params->sta_flags_set;
1055
1056         if (ieee80211_vif_is_mesh(&sdata->vif)) {
1057                 /*
1058                  * In mesh mode, ASSOCIATED isn't part of the nl80211
1059                  * API but must follow AUTHENTICATED for driver state.
1060                  */
1061                 if (mask & BIT(NL80211_STA_FLAG_AUTHENTICATED))
1062                         mask |= BIT(NL80211_STA_FLAG_ASSOCIATED);
1063                 if (set & BIT(NL80211_STA_FLAG_AUTHENTICATED))
1064                         set |= BIT(NL80211_STA_FLAG_ASSOCIATED);
1065         } else if (test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
1066                 /*
1067                  * TDLS -- everything follows authorized, but
1068                  * only becoming authorized is possible, not
1069                  * going back
1070                  */
1071                 if (set & BIT(NL80211_STA_FLAG_AUTHORIZED)) {
1072                         set |= BIT(NL80211_STA_FLAG_AUTHENTICATED) |
1073                                BIT(NL80211_STA_FLAG_ASSOCIATED);
1074                         mask |= BIT(NL80211_STA_FLAG_AUTHENTICATED) |
1075                                 BIT(NL80211_STA_FLAG_ASSOCIATED);
1076                 }
1077         }
1078
1079         if (mask & BIT(NL80211_STA_FLAG_WME) &&
1080             local->hw.queues >= IEEE80211_NUM_ACS)
1081                 sta->sta.wme = set & BIT(NL80211_STA_FLAG_WME);
1082
1083         /* auth flags will be set later for TDLS,
1084          * and for unassociated stations that move to assocaited */
1085         if (!test_sta_flag(sta, WLAN_STA_TDLS_PEER) &&
1086             !((mask & BIT(NL80211_STA_FLAG_ASSOCIATED)) &&
1087               (set & BIT(NL80211_STA_FLAG_ASSOCIATED)))) {
1088                 ret = sta_apply_auth_flags(local, sta, mask, set);
1089                 if (ret)
1090                         return ret;
1091         }
1092
1093         if (mask & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE)) {
1094                 if (set & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE))
1095                         set_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE);
1096                 else
1097                         clear_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE);
1098         }
1099
1100         if (mask & BIT(NL80211_STA_FLAG_MFP)) {
1101                 sta->sta.mfp = !!(set & BIT(NL80211_STA_FLAG_MFP));
1102                 if (set & BIT(NL80211_STA_FLAG_MFP))
1103                         set_sta_flag(sta, WLAN_STA_MFP);
1104                 else
1105                         clear_sta_flag(sta, WLAN_STA_MFP);
1106         }
1107
1108         if (mask & BIT(NL80211_STA_FLAG_TDLS_PEER)) {
1109                 if (set & BIT(NL80211_STA_FLAG_TDLS_PEER))
1110                         set_sta_flag(sta, WLAN_STA_TDLS_PEER);
1111                 else
1112                         clear_sta_flag(sta, WLAN_STA_TDLS_PEER);
1113         }
1114
1115         /* mark TDLS channel switch support, if the AP allows it */
1116         if (test_sta_flag(sta, WLAN_STA_TDLS_PEER) &&
1117             !sdata->u.mgd.tdls_chan_switch_prohibited &&
1118             params->ext_capab_len >= 4 &&
1119             params->ext_capab[3] & WLAN_EXT_CAPA4_TDLS_CHAN_SWITCH)
1120                 set_sta_flag(sta, WLAN_STA_TDLS_CHAN_SWITCH);
1121
1122         if (test_sta_flag(sta, WLAN_STA_TDLS_PEER) &&
1123             !sdata->u.mgd.tdls_wider_bw_prohibited &&
1124             ieee80211_hw_check(&local->hw, TDLS_WIDER_BW) &&
1125             params->ext_capab_len >= 8 &&
1126             params->ext_capab[7] & WLAN_EXT_CAPA8_TDLS_WIDE_BW_ENABLED)
1127                 set_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW);
1128
1129         if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD) {
1130                 sta->sta.uapsd_queues = params->uapsd_queues;
1131                 sta->sta.max_sp = params->max_sp;
1132         }
1133
1134         /*
1135          * cfg80211 validates this (1-2007) and allows setting the AID
1136          * only when creating a new station entry
1137          */
1138         if (params->aid)
1139                 sta->sta.aid = params->aid;
1140
1141         /*
1142          * Some of the following updates would be racy if called on an
1143          * existing station, via ieee80211_change_station(). However,
1144          * all such changes are rejected by cfg80211 except for updates
1145          * changing the supported rates on an existing but not yet used
1146          * TDLS peer.
1147          */
1148
1149         if (params->listen_interval >= 0)
1150                 sta->listen_interval = params->listen_interval;
1151
1152         if (params->supported_rates) {
1153                 ieee80211_parse_bitrates(&sdata->vif.bss_conf.chandef,
1154                                          sband, params->supported_rates,
1155                                          params->supported_rates_len,
1156                                          &sta->sta.supp_rates[band]);
1157         }
1158
1159         if (params->ht_capa)
1160                 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
1161                                                   params->ht_capa, sta);
1162
1163         if (params->vht_capa)
1164                 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
1165                                                     params->vht_capa, sta);
1166
1167         if (params->opmode_notif_used) {
1168                 /* returned value is only needed for rc update, but the
1169                  * rc isn't initialized here yet, so ignore it
1170                  */
1171                 __ieee80211_vht_handle_opmode(sdata, sta,
1172                                               params->opmode_notif,
1173                                               band, false);
1174         }
1175
1176         if (ieee80211_vif_is_mesh(&sdata->vif))
1177                 sta_apply_mesh_params(local, sta, params);
1178
1179         /* set the STA state after all sta info from usermode has been set */
1180         if (test_sta_flag(sta, WLAN_STA_TDLS_PEER) ||
1181             set & BIT(NL80211_STA_FLAG_ASSOCIATED)) {
1182                 ret = sta_apply_auth_flags(local, sta, mask, set);
1183                 if (ret)
1184                         return ret;
1185         }
1186
1187         return 0;
1188 }
1189
1190 static int ieee80211_add_station(struct wiphy *wiphy, struct net_device *dev,
1191                                  const u8 *mac,
1192                                  struct station_parameters *params)
1193 {
1194         struct ieee80211_local *local = wiphy_priv(wiphy);
1195         struct sta_info *sta;
1196         struct ieee80211_sub_if_data *sdata;
1197         int err;
1198         int layer2_update;
1199
1200         if (params->vlan) {
1201                 sdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
1202
1203                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1204                     sdata->vif.type != NL80211_IFTYPE_AP)
1205                         return -EINVAL;
1206         } else
1207                 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1208
1209         if (ether_addr_equal(mac, sdata->vif.addr))
1210                 return -EINVAL;
1211
1212         if (is_multicast_ether_addr(mac))
1213                 return -EINVAL;
1214
1215         sta = sta_info_alloc(sdata, mac, GFP_KERNEL);
1216         if (!sta)
1217                 return -ENOMEM;
1218
1219         /*
1220          * defaults -- if userspace wants something else we'll
1221          * change it accordingly in sta_apply_parameters()
1222          */
1223         if (!(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) &&
1224             !(params->sta_flags_set & (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
1225                                         BIT(NL80211_STA_FLAG_ASSOCIATED)))) {
1226                 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
1227                 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
1228         }
1229         if (params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
1230                 sta->sta.tdls = true;
1231
1232         err = sta_apply_parameters(local, sta, params);
1233         if (err) {
1234                 sta_info_free(local, sta);
1235                 return err;
1236         }
1237
1238         /*
1239          * for TDLS and for unassociated station, rate control should be
1240          * initialized only when rates are known and station is marked
1241          * authorized/associated
1242          */
1243         if (!test_sta_flag(sta, WLAN_STA_TDLS_PEER) &&
1244             test_sta_flag(sta, WLAN_STA_ASSOC))
1245                 rate_control_rate_init(sta);
1246
1247         layer2_update = sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1248                 sdata->vif.type == NL80211_IFTYPE_AP;
1249
1250         err = sta_info_insert_rcu(sta);
1251         if (err) {
1252                 rcu_read_unlock();
1253                 return err;
1254         }
1255
1256         if (layer2_update)
1257                 ieee80211_send_layer2_update(sta);
1258
1259         rcu_read_unlock();
1260
1261         return 0;
1262 }
1263
1264 static int ieee80211_del_station(struct wiphy *wiphy, struct net_device *dev,
1265                                  struct station_del_parameters *params)
1266 {
1267         struct ieee80211_sub_if_data *sdata;
1268
1269         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1270
1271         if (params->mac)
1272                 return sta_info_destroy_addr_bss(sdata, params->mac);
1273
1274         sta_info_flush(sdata);
1275         return 0;
1276 }
1277
1278 static int ieee80211_change_station(struct wiphy *wiphy,
1279                                     struct net_device *dev, const u8 *mac,
1280                                     struct station_parameters *params)
1281 {
1282         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1283         struct ieee80211_local *local = wiphy_priv(wiphy);
1284         struct sta_info *sta;
1285         struct ieee80211_sub_if_data *vlansdata;
1286         enum cfg80211_station_type statype;
1287         int err;
1288
1289         mutex_lock(&local->sta_mtx);
1290
1291         sta = sta_info_get_bss(sdata, mac);
1292         if (!sta) {
1293                 err = -ENOENT;
1294                 goto out_err;
1295         }
1296
1297         switch (sdata->vif.type) {
1298         case NL80211_IFTYPE_MESH_POINT:
1299                 if (sdata->u.mesh.user_mpm)
1300                         statype = CFG80211_STA_MESH_PEER_USER;
1301                 else
1302                         statype = CFG80211_STA_MESH_PEER_KERNEL;
1303                 break;
1304         case NL80211_IFTYPE_ADHOC:
1305                 statype = CFG80211_STA_IBSS;
1306                 break;
1307         case NL80211_IFTYPE_STATION:
1308                 if (!test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
1309                         statype = CFG80211_STA_AP_STA;
1310                         break;
1311                 }
1312                 if (test_sta_flag(sta, WLAN_STA_AUTHORIZED))
1313                         statype = CFG80211_STA_TDLS_PEER_ACTIVE;
1314                 else
1315                         statype = CFG80211_STA_TDLS_PEER_SETUP;
1316                 break;
1317         case NL80211_IFTYPE_AP:
1318         case NL80211_IFTYPE_AP_VLAN:
1319                 if (test_sta_flag(sta, WLAN_STA_ASSOC))
1320                         statype = CFG80211_STA_AP_CLIENT;
1321                 else
1322                         statype = CFG80211_STA_AP_CLIENT_UNASSOC;
1323                 break;
1324         default:
1325                 err = -EOPNOTSUPP;
1326                 goto out_err;
1327         }
1328
1329         err = cfg80211_check_station_change(wiphy, params, statype);
1330         if (err)
1331                 goto out_err;
1332
1333         if (params->vlan && params->vlan != sta->sdata->dev) {
1334                 bool prev_4addr = false;
1335                 bool new_4addr = false;
1336
1337                 vlansdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
1338
1339                 if (params->vlan->ieee80211_ptr->use_4addr) {
1340                         if (vlansdata->u.vlan.sta) {
1341                                 err = -EBUSY;
1342                                 goto out_err;
1343                         }
1344
1345                         rcu_assign_pointer(vlansdata->u.vlan.sta, sta);
1346                         new_4addr = true;
1347                 }
1348
1349                 if (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
1350                     sta->sdata->u.vlan.sta) {
1351                         RCU_INIT_POINTER(sta->sdata->u.vlan.sta, NULL);
1352                         prev_4addr = true;
1353                 }
1354
1355                 sta->sdata = vlansdata;
1356                 ieee80211_check_fast_xmit(sta);
1357
1358                 if (sta->sta_state == IEEE80211_STA_AUTHORIZED &&
1359                     prev_4addr != new_4addr) {
1360                         if (new_4addr)
1361                                 atomic_dec(&sta->sdata->bss->num_mcast_sta);
1362                         else
1363                                 atomic_inc(&sta->sdata->bss->num_mcast_sta);
1364                 }
1365
1366                 ieee80211_send_layer2_update(sta);
1367         }
1368
1369         err = sta_apply_parameters(local, sta, params);
1370         if (err)
1371                 goto out_err;
1372
1373         mutex_unlock(&local->sta_mtx);
1374
1375         if ((sdata->vif.type == NL80211_IFTYPE_AP ||
1376              sdata->vif.type == NL80211_IFTYPE_AP_VLAN) &&
1377             sta->known_smps_mode != sta->sdata->bss->req_smps &&
1378             test_sta_flag(sta, WLAN_STA_AUTHORIZED) &&
1379             sta_info_tx_streams(sta) != 1) {
1380                 ht_dbg(sta->sdata,
1381                        "%pM just authorized and MIMO capable - update SMPS\n",
1382                        sta->sta.addr);
1383                 ieee80211_send_smps_action(sta->sdata,
1384                         sta->sdata->bss->req_smps,
1385                         sta->sta.addr,
1386                         sta->sdata->vif.bss_conf.bssid);
1387         }
1388
1389         if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1390             params->sta_flags_mask & BIT(NL80211_STA_FLAG_AUTHORIZED)) {
1391                 ieee80211_recalc_ps(local);
1392                 ieee80211_recalc_ps_vif(sdata);
1393         }
1394
1395         return 0;
1396 out_err:
1397         mutex_unlock(&local->sta_mtx);
1398         return err;
1399 }
1400
1401 #ifdef CONFIG_MAC80211_MESH
1402 static int ieee80211_add_mpath(struct wiphy *wiphy, struct net_device *dev,
1403                                const u8 *dst, const u8 *next_hop)
1404 {
1405         struct ieee80211_sub_if_data *sdata;
1406         struct mesh_path *mpath;
1407         struct sta_info *sta;
1408
1409         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1410
1411         rcu_read_lock();
1412         sta = sta_info_get(sdata, next_hop);
1413         if (!sta) {
1414                 rcu_read_unlock();
1415                 return -ENOENT;
1416         }
1417
1418         mpath = mesh_path_add(sdata, dst);
1419         if (IS_ERR(mpath)) {
1420                 rcu_read_unlock();
1421                 return PTR_ERR(mpath);
1422         }
1423
1424         mesh_path_fix_nexthop(mpath, sta);
1425
1426         rcu_read_unlock();
1427         return 0;
1428 }
1429
1430 static int ieee80211_del_mpath(struct wiphy *wiphy, struct net_device *dev,
1431                                const u8 *dst)
1432 {
1433         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1434
1435         if (dst)
1436                 return mesh_path_del(sdata, dst);
1437
1438         mesh_path_flush_by_iface(sdata);
1439         return 0;
1440 }
1441
1442 static int ieee80211_change_mpath(struct wiphy *wiphy, struct net_device *dev,
1443                                   const u8 *dst, const u8 *next_hop)
1444 {
1445         struct ieee80211_sub_if_data *sdata;
1446         struct mesh_path *mpath;
1447         struct sta_info *sta;
1448
1449         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1450
1451         rcu_read_lock();
1452
1453         sta = sta_info_get(sdata, next_hop);
1454         if (!sta) {
1455                 rcu_read_unlock();
1456                 return -ENOENT;
1457         }
1458
1459         mpath = mesh_path_lookup(sdata, dst);
1460         if (!mpath) {
1461                 rcu_read_unlock();
1462                 return -ENOENT;
1463         }
1464
1465         mesh_path_fix_nexthop(mpath, sta);
1466
1467         rcu_read_unlock();
1468         return 0;
1469 }
1470
1471 static void mpath_set_pinfo(struct mesh_path *mpath, u8 *next_hop,
1472                             struct mpath_info *pinfo)
1473 {
1474         struct sta_info *next_hop_sta = rcu_dereference(mpath->next_hop);
1475
1476         if (next_hop_sta)
1477                 memcpy(next_hop, next_hop_sta->sta.addr, ETH_ALEN);
1478         else
1479                 eth_zero_addr(next_hop);
1480
1481         memset(pinfo, 0, sizeof(*pinfo));
1482
1483         pinfo->generation = mesh_paths_generation;
1484
1485         pinfo->filled = MPATH_INFO_FRAME_QLEN |
1486                         MPATH_INFO_SN |
1487                         MPATH_INFO_METRIC |
1488                         MPATH_INFO_EXPTIME |
1489                         MPATH_INFO_DISCOVERY_TIMEOUT |
1490                         MPATH_INFO_DISCOVERY_RETRIES |
1491                         MPATH_INFO_FLAGS;
1492
1493         pinfo->frame_qlen = mpath->frame_queue.qlen;
1494         pinfo->sn = mpath->sn;
1495         pinfo->metric = mpath->metric;
1496         if (time_before(jiffies, mpath->exp_time))
1497                 pinfo->exptime = jiffies_to_msecs(mpath->exp_time - jiffies);
1498         pinfo->discovery_timeout =
1499                         jiffies_to_msecs(mpath->discovery_timeout);
1500         pinfo->discovery_retries = mpath->discovery_retries;
1501         if (mpath->flags & MESH_PATH_ACTIVE)
1502                 pinfo->flags |= NL80211_MPATH_FLAG_ACTIVE;
1503         if (mpath->flags & MESH_PATH_RESOLVING)
1504                 pinfo->flags |= NL80211_MPATH_FLAG_RESOLVING;
1505         if (mpath->flags & MESH_PATH_SN_VALID)
1506                 pinfo->flags |= NL80211_MPATH_FLAG_SN_VALID;
1507         if (mpath->flags & MESH_PATH_FIXED)
1508                 pinfo->flags |= NL80211_MPATH_FLAG_FIXED;
1509         if (mpath->flags & MESH_PATH_RESOLVED)
1510                 pinfo->flags |= NL80211_MPATH_FLAG_RESOLVED;
1511 }
1512
1513 static int ieee80211_get_mpath(struct wiphy *wiphy, struct net_device *dev,
1514                                u8 *dst, u8 *next_hop, struct mpath_info *pinfo)
1515
1516 {
1517         struct ieee80211_sub_if_data *sdata;
1518         struct mesh_path *mpath;
1519
1520         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1521
1522         rcu_read_lock();
1523         mpath = mesh_path_lookup(sdata, dst);
1524         if (!mpath) {
1525                 rcu_read_unlock();
1526                 return -ENOENT;
1527         }
1528         memcpy(dst, mpath->dst, ETH_ALEN);
1529         mpath_set_pinfo(mpath, next_hop, pinfo);
1530         rcu_read_unlock();
1531         return 0;
1532 }
1533
1534 static int ieee80211_dump_mpath(struct wiphy *wiphy, struct net_device *dev,
1535                                 int idx, u8 *dst, u8 *next_hop,
1536                                 struct mpath_info *pinfo)
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_by_idx(sdata, idx);
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 void mpp_set_pinfo(struct mesh_path *mpath, u8 *mpp,
1556                           struct mpath_info *pinfo)
1557 {
1558         memset(pinfo, 0, sizeof(*pinfo));
1559         memcpy(mpp, mpath->mpp, ETH_ALEN);
1560
1561         pinfo->generation = mpp_paths_generation;
1562 }
1563
1564 static int ieee80211_get_mpp(struct wiphy *wiphy, struct net_device *dev,
1565                              u8 *dst, u8 *mpp, struct mpath_info *pinfo)
1566
1567 {
1568         struct ieee80211_sub_if_data *sdata;
1569         struct mesh_path *mpath;
1570
1571         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1572
1573         rcu_read_lock();
1574         mpath = mpp_path_lookup(sdata, dst);
1575         if (!mpath) {
1576                 rcu_read_unlock();
1577                 return -ENOENT;
1578         }
1579         memcpy(dst, mpath->dst, ETH_ALEN);
1580         mpp_set_pinfo(mpath, mpp, pinfo);
1581         rcu_read_unlock();
1582         return 0;
1583 }
1584
1585 static int ieee80211_dump_mpp(struct wiphy *wiphy, struct net_device *dev,
1586                               int idx, u8 *dst, u8 *mpp,
1587                               struct mpath_info *pinfo)
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_by_idx(sdata, idx);
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_get_mesh_config(struct wiphy *wiphy,
1607                                 struct net_device *dev,
1608                                 struct mesh_config *conf)
1609 {
1610         struct ieee80211_sub_if_data *sdata;
1611         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1612
1613         memcpy(conf, &(sdata->u.mesh.mshcfg), sizeof(struct mesh_config));
1614         return 0;
1615 }
1616
1617 static inline bool _chg_mesh_attr(enum nl80211_meshconf_params parm, u32 mask)
1618 {
1619         return (mask >> (parm-1)) & 0x1;
1620 }
1621
1622 static int copy_mesh_setup(struct ieee80211_if_mesh *ifmsh,
1623                 const struct mesh_setup *setup)
1624 {
1625         u8 *new_ie;
1626         const u8 *old_ie;
1627         struct ieee80211_sub_if_data *sdata = container_of(ifmsh,
1628                                         struct ieee80211_sub_if_data, u.mesh);
1629
1630         /* allocate information elements */
1631         new_ie = NULL;
1632         old_ie = ifmsh->ie;
1633
1634         if (setup->ie_len) {
1635                 new_ie = kmemdup(setup->ie, setup->ie_len,
1636                                 GFP_KERNEL);
1637                 if (!new_ie)
1638                         return -ENOMEM;
1639         }
1640         ifmsh->ie_len = setup->ie_len;
1641         ifmsh->ie = new_ie;
1642         kfree(old_ie);
1643
1644         /* now copy the rest of the setup parameters */
1645         ifmsh->mesh_id_len = setup->mesh_id_len;
1646         memcpy(ifmsh->mesh_id, setup->mesh_id, ifmsh->mesh_id_len);
1647         ifmsh->mesh_sp_id = setup->sync_method;
1648         ifmsh->mesh_pp_id = setup->path_sel_proto;
1649         ifmsh->mesh_pm_id = setup->path_metric;
1650         ifmsh->user_mpm = setup->user_mpm;
1651         ifmsh->mesh_auth_id = setup->auth_id;
1652         ifmsh->security = IEEE80211_MESH_SEC_NONE;
1653         if (setup->is_authenticated)
1654                 ifmsh->security |= IEEE80211_MESH_SEC_AUTHED;
1655         if (setup->is_secure)
1656                 ifmsh->security |= IEEE80211_MESH_SEC_SECURED;
1657
1658         /* mcast rate setting in Mesh Node */
1659         memcpy(sdata->vif.bss_conf.mcast_rate, setup->mcast_rate,
1660                                                 sizeof(setup->mcast_rate));
1661         sdata->vif.bss_conf.basic_rates = setup->basic_rates;
1662
1663         sdata->vif.bss_conf.beacon_int = setup->beacon_interval;
1664         sdata->vif.bss_conf.dtim_period = setup->dtim_period;
1665
1666         return 0;
1667 }
1668
1669 static int ieee80211_update_mesh_config(struct wiphy *wiphy,
1670                                         struct net_device *dev, u32 mask,
1671                                         const struct mesh_config *nconf)
1672 {
1673         struct mesh_config *conf;
1674         struct ieee80211_sub_if_data *sdata;
1675         struct ieee80211_if_mesh *ifmsh;
1676
1677         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1678         ifmsh = &sdata->u.mesh;
1679
1680         /* Set the config options which we are interested in setting */
1681         conf = &(sdata->u.mesh.mshcfg);
1682         if (_chg_mesh_attr(NL80211_MESHCONF_RETRY_TIMEOUT, mask))
1683                 conf->dot11MeshRetryTimeout = nconf->dot11MeshRetryTimeout;
1684         if (_chg_mesh_attr(NL80211_MESHCONF_CONFIRM_TIMEOUT, mask))
1685                 conf->dot11MeshConfirmTimeout = nconf->dot11MeshConfirmTimeout;
1686         if (_chg_mesh_attr(NL80211_MESHCONF_HOLDING_TIMEOUT, mask))
1687                 conf->dot11MeshHoldingTimeout = nconf->dot11MeshHoldingTimeout;
1688         if (_chg_mesh_attr(NL80211_MESHCONF_MAX_PEER_LINKS, mask))
1689                 conf->dot11MeshMaxPeerLinks = nconf->dot11MeshMaxPeerLinks;
1690         if (_chg_mesh_attr(NL80211_MESHCONF_MAX_RETRIES, mask))
1691                 conf->dot11MeshMaxRetries = nconf->dot11MeshMaxRetries;
1692         if (_chg_mesh_attr(NL80211_MESHCONF_TTL, mask))
1693                 conf->dot11MeshTTL = nconf->dot11MeshTTL;
1694         if (_chg_mesh_attr(NL80211_MESHCONF_ELEMENT_TTL, mask))
1695                 conf->element_ttl = nconf->element_ttl;
1696         if (_chg_mesh_attr(NL80211_MESHCONF_AUTO_OPEN_PLINKS, mask)) {
1697                 if (ifmsh->user_mpm)
1698                         return -EBUSY;
1699                 conf->auto_open_plinks = nconf->auto_open_plinks;
1700         }
1701         if (_chg_mesh_attr(NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR, mask))
1702                 conf->dot11MeshNbrOffsetMaxNeighbor =
1703                         nconf->dot11MeshNbrOffsetMaxNeighbor;
1704         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES, mask))
1705                 conf->dot11MeshHWMPmaxPREQretries =
1706                         nconf->dot11MeshHWMPmaxPREQretries;
1707         if (_chg_mesh_attr(NL80211_MESHCONF_PATH_REFRESH_TIME, mask))
1708                 conf->path_refresh_time = nconf->path_refresh_time;
1709         if (_chg_mesh_attr(NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT, mask))
1710                 conf->min_discovery_timeout = nconf->min_discovery_timeout;
1711         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT, mask))
1712                 conf->dot11MeshHWMPactivePathTimeout =
1713                         nconf->dot11MeshHWMPactivePathTimeout;
1714         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL, mask))
1715                 conf->dot11MeshHWMPpreqMinInterval =
1716                         nconf->dot11MeshHWMPpreqMinInterval;
1717         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL, mask))
1718                 conf->dot11MeshHWMPperrMinInterval =
1719                         nconf->dot11MeshHWMPperrMinInterval;
1720         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
1721                            mask))
1722                 conf->dot11MeshHWMPnetDiameterTraversalTime =
1723                         nconf->dot11MeshHWMPnetDiameterTraversalTime;
1724         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_ROOTMODE, mask)) {
1725                 conf->dot11MeshHWMPRootMode = nconf->dot11MeshHWMPRootMode;
1726                 ieee80211_mesh_root_setup(ifmsh);
1727         }
1728         if (_chg_mesh_attr(NL80211_MESHCONF_GATE_ANNOUNCEMENTS, mask)) {
1729                 /* our current gate announcement implementation rides on root
1730                  * announcements, so require this ifmsh to also be a root node
1731                  * */
1732                 if (nconf->dot11MeshGateAnnouncementProtocol &&
1733                     !(conf->dot11MeshHWMPRootMode > IEEE80211_ROOTMODE_ROOT)) {
1734                         conf->dot11MeshHWMPRootMode = IEEE80211_PROACTIVE_RANN;
1735                         ieee80211_mesh_root_setup(ifmsh);
1736                 }
1737                 conf->dot11MeshGateAnnouncementProtocol =
1738                         nconf->dot11MeshGateAnnouncementProtocol;
1739         }
1740         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_RANN_INTERVAL, mask))
1741                 conf->dot11MeshHWMPRannInterval =
1742                         nconf->dot11MeshHWMPRannInterval;
1743         if (_chg_mesh_attr(NL80211_MESHCONF_FORWARDING, mask))
1744                 conf->dot11MeshForwarding = nconf->dot11MeshForwarding;
1745         if (_chg_mesh_attr(NL80211_MESHCONF_RSSI_THRESHOLD, mask)) {
1746                 /* our RSSI threshold implementation is supported only for
1747                  * devices that report signal in dBm.
1748                  */
1749                 if (!ieee80211_hw_check(&sdata->local->hw, SIGNAL_DBM))
1750                         return -ENOTSUPP;
1751                 conf->rssi_threshold = nconf->rssi_threshold;
1752         }
1753         if (_chg_mesh_attr(NL80211_MESHCONF_HT_OPMODE, mask)) {
1754                 conf->ht_opmode = nconf->ht_opmode;
1755                 sdata->vif.bss_conf.ht_operation_mode = nconf->ht_opmode;
1756                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_HT);
1757         }
1758         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT, mask))
1759                 conf->dot11MeshHWMPactivePathToRootTimeout =
1760                         nconf->dot11MeshHWMPactivePathToRootTimeout;
1761         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_ROOT_INTERVAL, mask))
1762                 conf->dot11MeshHWMProotInterval =
1763                         nconf->dot11MeshHWMProotInterval;
1764         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL, mask))
1765                 conf->dot11MeshHWMPconfirmationInterval =
1766                         nconf->dot11MeshHWMPconfirmationInterval;
1767         if (_chg_mesh_attr(NL80211_MESHCONF_POWER_MODE, mask)) {
1768                 conf->power_mode = nconf->power_mode;
1769                 ieee80211_mps_local_status_update(sdata);
1770         }
1771         if (_chg_mesh_attr(NL80211_MESHCONF_AWAKE_WINDOW, mask))
1772                 conf->dot11MeshAwakeWindowDuration =
1773                         nconf->dot11MeshAwakeWindowDuration;
1774         if (_chg_mesh_attr(NL80211_MESHCONF_PLINK_TIMEOUT, mask))
1775                 conf->plink_timeout = nconf->plink_timeout;
1776         ieee80211_mbss_info_change_notify(sdata, BSS_CHANGED_BEACON);
1777         return 0;
1778 }
1779
1780 static int ieee80211_join_mesh(struct wiphy *wiphy, struct net_device *dev,
1781                                const struct mesh_config *conf,
1782                                const struct mesh_setup *setup)
1783 {
1784         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1785         struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1786         int err;
1787
1788         memcpy(&ifmsh->mshcfg, conf, sizeof(struct mesh_config));
1789         err = copy_mesh_setup(ifmsh, setup);
1790         if (err)
1791                 return err;
1792
1793         /* can mesh use other SMPS modes? */
1794         sdata->smps_mode = IEEE80211_SMPS_OFF;
1795         sdata->needed_rx_chains = sdata->local->rx_chains;
1796
1797         mutex_lock(&sdata->local->mtx);
1798         err = ieee80211_vif_use_channel(sdata, &setup->chandef,
1799                                         IEEE80211_CHANCTX_SHARED);
1800         mutex_unlock(&sdata->local->mtx);
1801         if (err)
1802                 return err;
1803
1804         return ieee80211_start_mesh(sdata);
1805 }
1806
1807 static int ieee80211_leave_mesh(struct wiphy *wiphy, struct net_device *dev)
1808 {
1809         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1810
1811         ieee80211_stop_mesh(sdata);
1812         mutex_lock(&sdata->local->mtx);
1813         ieee80211_vif_release_channel(sdata);
1814         mutex_unlock(&sdata->local->mtx);
1815
1816         return 0;
1817 }
1818 #endif
1819
1820 static int ieee80211_change_bss(struct wiphy *wiphy,
1821                                 struct net_device *dev,
1822                                 struct bss_parameters *params)
1823 {
1824         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1825         enum ieee80211_band band;
1826         u32 changed = 0;
1827
1828         if (!sdata_dereference(sdata->u.ap.beacon, sdata))
1829                 return -ENOENT;
1830
1831         band = ieee80211_get_sdata_band(sdata);
1832
1833         if (params->use_cts_prot >= 0) {
1834                 sdata->vif.bss_conf.use_cts_prot = params->use_cts_prot;
1835                 changed |= BSS_CHANGED_ERP_CTS_PROT;
1836         }
1837         if (params->use_short_preamble >= 0) {
1838                 sdata->vif.bss_conf.use_short_preamble =
1839                         params->use_short_preamble;
1840                 changed |= BSS_CHANGED_ERP_PREAMBLE;
1841         }
1842
1843         if (!sdata->vif.bss_conf.use_short_slot &&
1844             band == IEEE80211_BAND_5GHZ) {
1845                 sdata->vif.bss_conf.use_short_slot = true;
1846                 changed |= BSS_CHANGED_ERP_SLOT;
1847         }
1848
1849         if (params->use_short_slot_time >= 0) {
1850                 sdata->vif.bss_conf.use_short_slot =
1851                         params->use_short_slot_time;
1852                 changed |= BSS_CHANGED_ERP_SLOT;
1853         }
1854
1855         if (params->basic_rates) {
1856                 ieee80211_parse_bitrates(&sdata->vif.bss_conf.chandef,
1857                                          wiphy->bands[band],
1858                                          params->basic_rates,
1859                                          params->basic_rates_len,
1860                                          &sdata->vif.bss_conf.basic_rates);
1861                 changed |= BSS_CHANGED_BASIC_RATES;
1862         }
1863
1864         if (params->ap_isolate >= 0) {
1865                 if (params->ap_isolate)
1866                         sdata->flags |= IEEE80211_SDATA_DONT_BRIDGE_PACKETS;
1867                 else
1868                         sdata->flags &= ~IEEE80211_SDATA_DONT_BRIDGE_PACKETS;
1869         }
1870
1871         if (params->ht_opmode >= 0) {
1872                 sdata->vif.bss_conf.ht_operation_mode =
1873                         (u16) params->ht_opmode;
1874                 changed |= BSS_CHANGED_HT;
1875         }
1876
1877         if (params->p2p_ctwindow >= 0) {
1878                 sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow &=
1879                                         ~IEEE80211_P2P_OPPPS_CTWINDOW_MASK;
1880                 sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow |=
1881                         params->p2p_ctwindow & IEEE80211_P2P_OPPPS_CTWINDOW_MASK;
1882                 changed |= BSS_CHANGED_P2P_PS;
1883         }
1884
1885         if (params->p2p_opp_ps > 0) {
1886                 sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow |=
1887                                         IEEE80211_P2P_OPPPS_ENABLE_BIT;
1888                 changed |= BSS_CHANGED_P2P_PS;
1889         } else if (params->p2p_opp_ps == 0) {
1890                 sdata->vif.bss_conf.p2p_noa_attr.oppps_ctwindow &=
1891                                         ~IEEE80211_P2P_OPPPS_ENABLE_BIT;
1892                 changed |= BSS_CHANGED_P2P_PS;
1893         }
1894
1895         ieee80211_bss_info_change_notify(sdata, changed);
1896
1897         return 0;
1898 }
1899
1900 static int ieee80211_set_txq_params(struct wiphy *wiphy,
1901                                     struct net_device *dev,
1902                                     struct ieee80211_txq_params *params)
1903 {
1904         struct ieee80211_local *local = wiphy_priv(wiphy);
1905         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1906         struct ieee80211_tx_queue_params p;
1907
1908         if (!local->ops->conf_tx)
1909                 return -EOPNOTSUPP;
1910
1911         if (local->hw.queues < IEEE80211_NUM_ACS)
1912                 return -EOPNOTSUPP;
1913
1914         memset(&p, 0, sizeof(p));
1915         p.aifs = params->aifs;
1916         p.cw_max = params->cwmax;
1917         p.cw_min = params->cwmin;
1918         p.txop = params->txop;
1919
1920         /*
1921          * Setting tx queue params disables u-apsd because it's only
1922          * called in master mode.
1923          */
1924         p.uapsd = false;
1925
1926         sdata->tx_conf[params->ac] = p;
1927         if (drv_conf_tx(local, sdata, params->ac, &p)) {
1928                 wiphy_debug(local->hw.wiphy,
1929                             "failed to set TX queue parameters for AC %d\n",
1930                             params->ac);
1931                 return -EINVAL;
1932         }
1933
1934         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
1935
1936         return 0;
1937 }
1938
1939 #ifdef CONFIG_PM
1940 static int ieee80211_suspend(struct wiphy *wiphy,
1941                              struct cfg80211_wowlan *wowlan)
1942 {
1943         return __ieee80211_suspend(wiphy_priv(wiphy), wowlan);
1944 }
1945
1946 static int ieee80211_resume(struct wiphy *wiphy)
1947 {
1948         return __ieee80211_resume(wiphy_priv(wiphy));
1949 }
1950 #else
1951 #define ieee80211_suspend NULL
1952 #define ieee80211_resume NULL
1953 #endif
1954
1955 static int ieee80211_scan(struct wiphy *wiphy,
1956                           struct cfg80211_scan_request *req)
1957 {
1958         struct ieee80211_sub_if_data *sdata;
1959
1960         sdata = IEEE80211_WDEV_TO_SUB_IF(req->wdev);
1961
1962         switch (ieee80211_vif_type_p2p(&sdata->vif)) {
1963         case NL80211_IFTYPE_STATION:
1964         case NL80211_IFTYPE_ADHOC:
1965         case NL80211_IFTYPE_MESH_POINT:
1966         case NL80211_IFTYPE_P2P_CLIENT:
1967         case NL80211_IFTYPE_P2P_DEVICE:
1968                 break;
1969         case NL80211_IFTYPE_P2P_GO:
1970                 if (sdata->local->ops->hw_scan)
1971                         break;
1972                 /*
1973                  * FIXME: implement NoA while scanning in software,
1974                  * for now fall through to allow scanning only when
1975                  * beaconing hasn't been configured yet
1976                  */
1977         case NL80211_IFTYPE_AP:
1978                 /*
1979                  * If the scan has been forced (and the driver supports
1980                  * forcing), don't care about being beaconing already.
1981                  * This will create problems to the attached stations (e.g. all
1982                  * the  frames sent while scanning on other channel will be
1983                  * lost)
1984                  */
1985                 if (sdata->u.ap.beacon &&
1986                     (!(wiphy->features & NL80211_FEATURE_AP_SCAN) ||
1987                      !(req->flags & NL80211_SCAN_FLAG_AP)))
1988                         return -EOPNOTSUPP;
1989                 break;
1990         default:
1991                 return -EOPNOTSUPP;
1992         }
1993
1994         return ieee80211_request_scan(sdata, req);
1995 }
1996
1997 static int
1998 ieee80211_sched_scan_start(struct wiphy *wiphy,
1999                            struct net_device *dev,
2000                            struct cfg80211_sched_scan_request *req)
2001 {
2002         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2003
2004         if (!sdata->local->ops->sched_scan_start)
2005                 return -EOPNOTSUPP;
2006
2007         return ieee80211_request_sched_scan_start(sdata, req);
2008 }
2009
2010 static int
2011 ieee80211_sched_scan_stop(struct wiphy *wiphy, struct net_device *dev)
2012 {
2013         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2014
2015         if (!sdata->local->ops->sched_scan_stop)
2016                 return -EOPNOTSUPP;
2017
2018         return ieee80211_request_sched_scan_stop(sdata);
2019 }
2020
2021 static int ieee80211_auth(struct wiphy *wiphy, struct net_device *dev,
2022                           struct cfg80211_auth_request *req)
2023 {
2024         return ieee80211_mgd_auth(IEEE80211_DEV_TO_SUB_IF(dev), req);
2025 }
2026
2027 static int ieee80211_assoc(struct wiphy *wiphy, struct net_device *dev,
2028                            struct cfg80211_assoc_request *req)
2029 {
2030         return ieee80211_mgd_assoc(IEEE80211_DEV_TO_SUB_IF(dev), req);
2031 }
2032
2033 static int ieee80211_deauth(struct wiphy *wiphy, struct net_device *dev,
2034                             struct cfg80211_deauth_request *req)
2035 {
2036         return ieee80211_mgd_deauth(IEEE80211_DEV_TO_SUB_IF(dev), req);
2037 }
2038
2039 static int ieee80211_disassoc(struct wiphy *wiphy, struct net_device *dev,
2040                               struct cfg80211_disassoc_request *req)
2041 {
2042         return ieee80211_mgd_disassoc(IEEE80211_DEV_TO_SUB_IF(dev), req);
2043 }
2044
2045 static int ieee80211_join_ibss(struct wiphy *wiphy, struct net_device *dev,
2046                                struct cfg80211_ibss_params *params)
2047 {
2048         return ieee80211_ibss_join(IEEE80211_DEV_TO_SUB_IF(dev), params);
2049 }
2050
2051 static int ieee80211_leave_ibss(struct wiphy *wiphy, struct net_device *dev)
2052 {
2053         return ieee80211_ibss_leave(IEEE80211_DEV_TO_SUB_IF(dev));
2054 }
2055
2056 static int ieee80211_join_ocb(struct wiphy *wiphy, struct net_device *dev,
2057                               struct ocb_setup *setup)
2058 {
2059         return ieee80211_ocb_join(IEEE80211_DEV_TO_SUB_IF(dev), setup);
2060 }
2061
2062 static int ieee80211_leave_ocb(struct wiphy *wiphy, struct net_device *dev)
2063 {
2064         return ieee80211_ocb_leave(IEEE80211_DEV_TO_SUB_IF(dev));
2065 }
2066
2067 static int ieee80211_set_mcast_rate(struct wiphy *wiphy, struct net_device *dev,
2068                                     int rate[IEEE80211_NUM_BANDS])
2069 {
2070         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2071
2072         memcpy(sdata->vif.bss_conf.mcast_rate, rate,
2073                sizeof(int) * IEEE80211_NUM_BANDS);
2074
2075         return 0;
2076 }
2077
2078 static int ieee80211_set_wiphy_params(struct wiphy *wiphy, u32 changed)
2079 {
2080         struct ieee80211_local *local = wiphy_priv(wiphy);
2081         int err;
2082
2083         if (changed & WIPHY_PARAM_FRAG_THRESHOLD) {
2084                 ieee80211_check_fast_xmit_all(local);
2085
2086                 err = drv_set_frag_threshold(local, wiphy->frag_threshold);
2087
2088                 if (err) {
2089                         ieee80211_check_fast_xmit_all(local);
2090                         return err;
2091                 }
2092         }
2093
2094         if ((changed & WIPHY_PARAM_COVERAGE_CLASS) ||
2095             (changed & WIPHY_PARAM_DYN_ACK)) {
2096                 s16 coverage_class;
2097
2098                 coverage_class = changed & WIPHY_PARAM_COVERAGE_CLASS ?
2099                                         wiphy->coverage_class : -1;
2100                 err = drv_set_coverage_class(local, coverage_class);
2101
2102                 if (err)
2103                         return err;
2104         }
2105
2106         if (changed & WIPHY_PARAM_RTS_THRESHOLD) {
2107                 err = drv_set_rts_threshold(local, wiphy->rts_threshold);
2108
2109                 if (err)
2110                         return err;
2111         }
2112
2113         if (changed & WIPHY_PARAM_RETRY_SHORT) {
2114                 if (wiphy->retry_short > IEEE80211_MAX_TX_RETRY)
2115                         return -EINVAL;
2116                 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
2117         }
2118         if (changed & WIPHY_PARAM_RETRY_LONG) {
2119                 if (wiphy->retry_long > IEEE80211_MAX_TX_RETRY)
2120                         return -EINVAL;
2121                 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
2122         }
2123         if (changed &
2124             (WIPHY_PARAM_RETRY_SHORT | WIPHY_PARAM_RETRY_LONG))
2125                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_RETRY_LIMITS);
2126
2127         return 0;
2128 }
2129
2130 static int ieee80211_set_tx_power(struct wiphy *wiphy,
2131                                   struct wireless_dev *wdev,
2132                                   enum nl80211_tx_power_setting type, int mbm)
2133 {
2134         struct ieee80211_local *local = wiphy_priv(wiphy);
2135         struct ieee80211_sub_if_data *sdata;
2136         enum nl80211_tx_power_setting txp_type = type;
2137         bool update_txp_type = false;
2138
2139         if (wdev) {
2140                 sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
2141
2142                 switch (type) {
2143                 case NL80211_TX_POWER_AUTOMATIC:
2144                         sdata->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
2145                         txp_type = NL80211_TX_POWER_LIMITED;
2146                         break;
2147                 case NL80211_TX_POWER_LIMITED:
2148                 case NL80211_TX_POWER_FIXED:
2149                         if (mbm < 0 || (mbm % 100))
2150                                 return -EOPNOTSUPP;
2151                         sdata->user_power_level = MBM_TO_DBM(mbm);
2152                         break;
2153                 }
2154
2155                 if (txp_type != sdata->vif.bss_conf.txpower_type) {
2156                         update_txp_type = true;
2157                         sdata->vif.bss_conf.txpower_type = txp_type;
2158                 }
2159
2160                 ieee80211_recalc_txpower(sdata, update_txp_type);
2161
2162                 return 0;
2163         }
2164
2165         switch (type) {
2166         case NL80211_TX_POWER_AUTOMATIC:
2167                 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
2168                 txp_type = NL80211_TX_POWER_LIMITED;
2169                 break;
2170         case NL80211_TX_POWER_LIMITED:
2171         case NL80211_TX_POWER_FIXED:
2172                 if (mbm < 0 || (mbm % 100))
2173                         return -EOPNOTSUPP;
2174                 local->user_power_level = MBM_TO_DBM(mbm);
2175                 break;
2176         }
2177
2178         mutex_lock(&local->iflist_mtx);
2179         list_for_each_entry(sdata, &local->interfaces, list) {
2180                 sdata->user_power_level = local->user_power_level;
2181                 if (txp_type != sdata->vif.bss_conf.txpower_type)
2182                         update_txp_type = true;
2183                 sdata->vif.bss_conf.txpower_type = txp_type;
2184         }
2185         list_for_each_entry(sdata, &local->interfaces, list)
2186                 ieee80211_recalc_txpower(sdata, update_txp_type);
2187         mutex_unlock(&local->iflist_mtx);
2188
2189         return 0;
2190 }
2191
2192 static int ieee80211_get_tx_power(struct wiphy *wiphy,
2193                                   struct wireless_dev *wdev,
2194                                   int *dbm)
2195 {
2196         struct ieee80211_local *local = wiphy_priv(wiphy);
2197         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
2198
2199         if (local->ops->get_txpower)
2200                 return drv_get_txpower(local, sdata, dbm);
2201
2202         if (!local->use_chanctx)
2203                 *dbm = local->hw.conf.power_level;
2204         else
2205                 *dbm = sdata->vif.bss_conf.txpower;
2206
2207         return 0;
2208 }
2209
2210 static int ieee80211_set_wds_peer(struct wiphy *wiphy, struct net_device *dev,
2211                                   const u8 *addr)
2212 {
2213         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2214
2215         memcpy(&sdata->u.wds.remote_addr, addr, ETH_ALEN);
2216
2217         return 0;
2218 }
2219
2220 static void ieee80211_rfkill_poll(struct wiphy *wiphy)
2221 {
2222         struct ieee80211_local *local = wiphy_priv(wiphy);
2223
2224         drv_rfkill_poll(local);
2225 }
2226
2227 #ifdef CONFIG_NL80211_TESTMODE
2228 static int ieee80211_testmode_cmd(struct wiphy *wiphy,
2229                                   struct wireless_dev *wdev,
2230                                   void *data, int len)
2231 {
2232         struct ieee80211_local *local = wiphy_priv(wiphy);
2233         struct ieee80211_vif *vif = NULL;
2234
2235         if (!local->ops->testmode_cmd)
2236                 return -EOPNOTSUPP;
2237
2238         if (wdev) {
2239                 struct ieee80211_sub_if_data *sdata;
2240
2241                 sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
2242                 if (sdata->flags & IEEE80211_SDATA_IN_DRIVER)
2243                         vif = &sdata->vif;
2244         }
2245
2246         return local->ops->testmode_cmd(&local->hw, vif, data, len);
2247 }
2248
2249 static int ieee80211_testmode_dump(struct wiphy *wiphy,
2250                                    struct sk_buff *skb,
2251                                    struct netlink_callback *cb,
2252                                    void *data, int len)
2253 {
2254         struct ieee80211_local *local = wiphy_priv(wiphy);
2255
2256         if (!local->ops->testmode_dump)
2257                 return -EOPNOTSUPP;
2258
2259         return local->ops->testmode_dump(&local->hw, skb, cb, data, len);
2260 }
2261 #endif
2262
2263 int __ieee80211_request_smps_ap(struct ieee80211_sub_if_data *sdata,
2264                                 enum ieee80211_smps_mode smps_mode)
2265 {
2266         struct sta_info *sta;
2267         enum ieee80211_smps_mode old_req;
2268
2269         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP))
2270                 return -EINVAL;
2271
2272         if (sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT)
2273                 return 0;
2274
2275         old_req = sdata->u.ap.req_smps;
2276         sdata->u.ap.req_smps = smps_mode;
2277
2278         /* AUTOMATIC doesn't mean much for AP - don't allow it */
2279         if (old_req == smps_mode ||
2280             smps_mode == IEEE80211_SMPS_AUTOMATIC)
2281                 return 0;
2282
2283          /* If no associated stations, there's no need to do anything */
2284         if (!atomic_read(&sdata->u.ap.num_mcast_sta)) {
2285                 sdata->smps_mode = smps_mode;
2286                 ieee80211_queue_work(&sdata->local->hw, &sdata->recalc_smps);
2287                 return 0;
2288         }
2289
2290         ht_dbg(sdata,
2291                "SMPS %d requested in AP mode, sending Action frame to %d stations\n",
2292                smps_mode, atomic_read(&sdata->u.ap.num_mcast_sta));
2293
2294         mutex_lock(&sdata->local->sta_mtx);
2295         list_for_each_entry(sta, &sdata->local->sta_list, list) {
2296                 /*
2297                  * Only stations associated to our AP and
2298                  * associated VLANs
2299                  */
2300                 if (sta->sdata->bss != &sdata->u.ap)
2301                         continue;
2302
2303                 /* This station doesn't support MIMO - skip it */
2304                 if (sta_info_tx_streams(sta) == 1)
2305                         continue;
2306
2307                 /*
2308                  * Don't wake up a STA just to send the action frame
2309                  * unless we are getting more restrictive.
2310                  */
2311                 if (test_sta_flag(sta, WLAN_STA_PS_STA) &&
2312                     !ieee80211_smps_is_restrictive(sta->known_smps_mode,
2313                                                    smps_mode)) {
2314                         ht_dbg(sdata, "Won't send SMPS to sleeping STA %pM\n",
2315                                sta->sta.addr);
2316                         continue;
2317                 }
2318
2319                 /*
2320                  * If the STA is not authorized, wait until it gets
2321                  * authorized and the action frame will be sent then.
2322                  */
2323                 if (!test_sta_flag(sta, WLAN_STA_AUTHORIZED))
2324                         continue;
2325
2326                 ht_dbg(sdata, "Sending SMPS to %pM\n", sta->sta.addr);
2327                 ieee80211_send_smps_action(sdata, smps_mode, sta->sta.addr,
2328                                            sdata->vif.bss_conf.bssid);
2329         }
2330         mutex_unlock(&sdata->local->sta_mtx);
2331
2332         sdata->smps_mode = smps_mode;
2333         ieee80211_queue_work(&sdata->local->hw, &sdata->recalc_smps);
2334
2335         return 0;
2336 }
2337
2338 int __ieee80211_request_smps_mgd(struct ieee80211_sub_if_data *sdata,
2339                                  enum ieee80211_smps_mode smps_mode)
2340 {
2341         const u8 *ap;
2342         enum ieee80211_smps_mode old_req;
2343         int err;
2344         struct sta_info *sta;
2345         bool tdls_peer_found = false;
2346
2347         lockdep_assert_held(&sdata->wdev.mtx);
2348
2349         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION))
2350                 return -EINVAL;
2351
2352         old_req = sdata->u.mgd.req_smps;
2353         sdata->u.mgd.req_smps = smps_mode;
2354
2355         if (old_req == smps_mode &&
2356             smps_mode != IEEE80211_SMPS_AUTOMATIC)
2357                 return 0;
2358
2359         /*
2360          * If not associated, or current association is not an HT
2361          * association, there's no need to do anything, just store
2362          * the new value until we associate.
2363          */
2364         if (!sdata->u.mgd.associated ||
2365             sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT)
2366                 return 0;
2367
2368         ap = sdata->u.mgd.associated->bssid;
2369
2370         rcu_read_lock();
2371         list_for_each_entry_rcu(sta, &sdata->local->sta_list, list) {
2372                 if (!sta->sta.tdls || sta->sdata != sdata || !sta->uploaded ||
2373                     !test_sta_flag(sta, WLAN_STA_AUTHORIZED))
2374                         continue;
2375
2376                 tdls_peer_found = true;
2377                 break;
2378         }
2379         rcu_read_unlock();
2380
2381         if (smps_mode == IEEE80211_SMPS_AUTOMATIC) {
2382                 if (tdls_peer_found || !sdata->u.mgd.powersave)
2383                         smps_mode = IEEE80211_SMPS_OFF;
2384                 else
2385                         smps_mode = IEEE80211_SMPS_DYNAMIC;
2386         }
2387
2388         /* send SM PS frame to AP */
2389         err = ieee80211_send_smps_action(sdata, smps_mode,
2390                                          ap, ap);
2391         if (err)
2392                 sdata->u.mgd.req_smps = old_req;
2393         else if (smps_mode != IEEE80211_SMPS_OFF && tdls_peer_found)
2394                 ieee80211_teardown_tdls_peers(sdata);
2395
2396         return err;
2397 }
2398
2399 static int ieee80211_set_power_mgmt(struct wiphy *wiphy, struct net_device *dev,
2400                                     bool enabled, int timeout)
2401 {
2402         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2403         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2404
2405         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2406                 return -EOPNOTSUPP;
2407
2408         if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS))
2409                 return -EOPNOTSUPP;
2410
2411         if (enabled == sdata->u.mgd.powersave &&
2412             timeout == local->dynamic_ps_forced_timeout)
2413                 return 0;
2414
2415         sdata->u.mgd.powersave = enabled;
2416         local->dynamic_ps_forced_timeout = timeout;
2417
2418         /* no change, but if automatic follow powersave */
2419         sdata_lock(sdata);
2420         __ieee80211_request_smps_mgd(sdata, sdata->u.mgd.req_smps);
2421         sdata_unlock(sdata);
2422
2423         if (ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS))
2424                 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
2425
2426         ieee80211_recalc_ps(local);
2427         ieee80211_recalc_ps_vif(sdata);
2428
2429         return 0;
2430 }
2431
2432 static int ieee80211_set_cqm_rssi_config(struct wiphy *wiphy,
2433                                          struct net_device *dev,
2434                                          s32 rssi_thold, u32 rssi_hyst)
2435 {
2436         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2437         struct ieee80211_vif *vif = &sdata->vif;
2438         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
2439
2440         if (rssi_thold == bss_conf->cqm_rssi_thold &&
2441             rssi_hyst == bss_conf->cqm_rssi_hyst)
2442                 return 0;
2443
2444         if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER &&
2445             !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI))
2446                 return -EOPNOTSUPP;
2447
2448         bss_conf->cqm_rssi_thold = rssi_thold;
2449         bss_conf->cqm_rssi_hyst = rssi_hyst;
2450         sdata->u.mgd.last_cqm_event_signal = 0;
2451
2452         /* tell the driver upon association, unless already associated */
2453         if (sdata->u.mgd.associated &&
2454             sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)
2455                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_CQM);
2456
2457         return 0;
2458 }
2459
2460 static int ieee80211_set_bitrate_mask(struct wiphy *wiphy,
2461                                       struct net_device *dev,
2462                                       const u8 *addr,
2463                                       const struct cfg80211_bitrate_mask *mask)
2464 {
2465         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2466         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2467         int i, ret;
2468
2469         if (!ieee80211_sdata_running(sdata))
2470                 return -ENETDOWN;
2471
2472         if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) {
2473                 ret = drv_set_bitrate_mask(local, sdata, mask);
2474                 if (ret)
2475                         return ret;
2476         }
2477
2478         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
2479                 struct ieee80211_supported_band *sband = wiphy->bands[i];
2480                 int j;
2481
2482                 sdata->rc_rateidx_mask[i] = mask->control[i].legacy;
2483                 memcpy(sdata->rc_rateidx_mcs_mask[i], mask->control[i].ht_mcs,
2484                        sizeof(mask->control[i].ht_mcs));
2485                 memcpy(sdata->rc_rateidx_vht_mcs_mask[i],
2486                        mask->control[i].vht_mcs,
2487                        sizeof(mask->control[i].vht_mcs));
2488
2489                 sdata->rc_has_mcs_mask[i] = false;
2490                 sdata->rc_has_vht_mcs_mask[i] = false;
2491                 if (!sband)
2492                         continue;
2493
2494                 for (j = 0; j < IEEE80211_HT_MCS_MASK_LEN; j++) {
2495                         if (~sdata->rc_rateidx_mcs_mask[i][j]) {
2496                                 sdata->rc_has_mcs_mask[i] = true;
2497                                 break;
2498                         }
2499                 }
2500
2501                 for (j = 0; j < NL80211_VHT_NSS_MAX; j++) {
2502                         if (~sdata->rc_rateidx_vht_mcs_mask[i][j]) {
2503                                 sdata->rc_has_vht_mcs_mask[i] = true;
2504                                 break;
2505                         }
2506                 }
2507         }
2508
2509         return 0;
2510 }
2511
2512 static bool ieee80211_coalesce_started_roc(struct ieee80211_local *local,
2513                                            struct ieee80211_roc_work *new_roc,
2514                                            struct ieee80211_roc_work *cur_roc)
2515 {
2516         unsigned long now = jiffies;
2517         unsigned long remaining = cur_roc->hw_start_time +
2518                                   msecs_to_jiffies(cur_roc->duration) -
2519                                   now;
2520
2521         if (WARN_ON(!cur_roc->started || !cur_roc->hw_begun))
2522                 return false;
2523
2524         /* if it doesn't fit entirely, schedule a new one */
2525         if (new_roc->duration > jiffies_to_msecs(remaining))
2526                 return false;
2527
2528         ieee80211_handle_roc_started(new_roc);
2529
2530         /* add to dependents so we send the expired event properly */
2531         list_add_tail(&new_roc->list, &cur_roc->dependents);
2532         return true;
2533 }
2534
2535 static u64 ieee80211_mgmt_tx_cookie(struct ieee80211_local *local)
2536 {
2537         lockdep_assert_held(&local->mtx);
2538
2539         local->roc_cookie_counter++;
2540
2541         /* wow, you wrapped 64 bits ... more likely a bug */
2542         if (WARN_ON(local->roc_cookie_counter == 0))
2543                 local->roc_cookie_counter++;
2544
2545         return local->roc_cookie_counter;
2546 }
2547
2548 static int ieee80211_start_roc_work(struct ieee80211_local *local,
2549                                     struct ieee80211_sub_if_data *sdata,
2550                                     struct ieee80211_channel *channel,
2551                                     unsigned int duration, u64 *cookie,
2552                                     struct sk_buff *txskb,
2553                                     enum ieee80211_roc_type type)
2554 {
2555         struct ieee80211_roc_work *roc, *tmp;
2556         bool queued = false;
2557         int ret;
2558
2559         lockdep_assert_held(&local->mtx);
2560
2561         if (local->use_chanctx && !local->ops->remain_on_channel)
2562                 return -EOPNOTSUPP;
2563
2564         roc = kzalloc(sizeof(*roc), GFP_KERNEL);
2565         if (!roc)
2566                 return -ENOMEM;
2567
2568         /*
2569          * If the duration is zero, then the driver
2570          * wouldn't actually do anything. Set it to
2571          * 10 for now.
2572          *
2573          * TODO: cancel the off-channel operation
2574          *       when we get the SKB's TX status and
2575          *       the wait time was zero before.
2576          */
2577         if (!duration)
2578                 duration = 10;
2579
2580         roc->chan = channel;
2581         roc->duration = duration;
2582         roc->req_duration = duration;
2583         roc->frame = txskb;
2584         roc->type = type;
2585         roc->sdata = sdata;
2586         INIT_DELAYED_WORK(&roc->work, ieee80211_sw_roc_work);
2587         INIT_LIST_HEAD(&roc->dependents);
2588
2589         /*
2590          * cookie is either the roc cookie (for normal roc)
2591          * or the SKB (for mgmt TX)
2592          */
2593         if (!txskb) {
2594                 roc->cookie = ieee80211_mgmt_tx_cookie(local);
2595                 *cookie = roc->cookie;
2596         } else {
2597                 roc->mgmt_tx_cookie = *cookie;
2598         }
2599
2600         /* if there's one pending or we're scanning, queue this one */
2601         if (!list_empty(&local->roc_list) ||
2602             local->scanning || ieee80211_is_radar_required(local))
2603                 goto out_check_combine;
2604
2605         /* if not HW assist, just queue & schedule work */
2606         if (!local->ops->remain_on_channel) {
2607                 ieee80211_queue_delayed_work(&local->hw, &roc->work, 0);
2608                 goto out_queue;
2609         }
2610
2611         /* otherwise actually kick it off here (for error handling) */
2612
2613         ret = drv_remain_on_channel(local, sdata, channel, duration, type);
2614         if (ret) {
2615                 kfree(roc);
2616                 return ret;
2617         }
2618
2619         roc->started = true;
2620         goto out_queue;
2621
2622  out_check_combine:
2623         list_for_each_entry(tmp, &local->roc_list, list) {
2624                 if (tmp->chan != channel || tmp->sdata != sdata)
2625                         continue;
2626
2627                 /*
2628                  * Extend this ROC if possible:
2629                  *
2630                  * If it hasn't started yet, just increase the duration
2631                  * and add the new one to the list of dependents.
2632                  * If the type of the new ROC has higher priority, modify the
2633                  * type of the previous one to match that of the new one.
2634                  */
2635                 if (!tmp->started) {
2636                         list_add_tail(&roc->list, &tmp->dependents);
2637                         tmp->duration = max(tmp->duration, roc->duration);
2638                         tmp->type = max(tmp->type, roc->type);
2639                         queued = true;
2640                         break;
2641                 }
2642
2643                 /* If it has already started, it's more difficult ... */
2644                 if (local->ops->remain_on_channel) {
2645                         /*
2646                          * In the offloaded ROC case, if it hasn't begun, add
2647                          * this new one to the dependent list to be handled
2648                          * when the master one begins. If it has begun,
2649                          * check if it fits entirely within the existing one,
2650                          * in which case it will just be dependent as well.
2651                          * Otherwise, schedule it by itself.
2652                          */
2653                         if (!tmp->hw_begun) {
2654                                 list_add_tail(&roc->list, &tmp->dependents);
2655                                 queued = true;
2656                                 break;
2657                         }
2658
2659                         if (ieee80211_coalesce_started_roc(local, roc, tmp))
2660                                 queued = true;
2661                 } else if (del_timer_sync(&tmp->work.timer)) {
2662                         unsigned long new_end;
2663
2664                         /*
2665                          * In the software ROC case, cancel the timer, if
2666                          * that fails then the finish work is already
2667                          * queued/pending and thus we queue the new ROC
2668                          * normally, if that succeeds then we can extend
2669                          * the timer duration and TX the frame (if any.)
2670                          */
2671
2672                         list_add_tail(&roc->list, &tmp->dependents);
2673                         queued = true;
2674
2675                         new_end = jiffies + msecs_to_jiffies(roc->duration);
2676
2677                         /* ok, it was started & we canceled timer */
2678                         if (time_after(new_end, tmp->work.timer.expires))
2679                                 mod_timer(&tmp->work.timer, new_end);
2680                         else
2681                                 add_timer(&tmp->work.timer);
2682
2683                         ieee80211_handle_roc_started(roc);
2684                 }
2685                 break;
2686         }
2687
2688  out_queue:
2689         if (!queued)
2690                 list_add_tail(&roc->list, &local->roc_list);
2691
2692         return 0;
2693 }
2694
2695 static int ieee80211_remain_on_channel(struct wiphy *wiphy,
2696                                        struct wireless_dev *wdev,
2697                                        struct ieee80211_channel *chan,
2698                                        unsigned int duration,
2699                                        u64 *cookie)
2700 {
2701         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
2702         struct ieee80211_local *local = sdata->local;
2703         int ret;
2704
2705         mutex_lock(&local->mtx);
2706         ret = ieee80211_start_roc_work(local, sdata, chan,
2707                                        duration, cookie, NULL,
2708                                        IEEE80211_ROC_TYPE_NORMAL);
2709         mutex_unlock(&local->mtx);
2710
2711         return ret;
2712 }
2713
2714 static int ieee80211_cancel_roc(struct ieee80211_local *local,
2715                                 u64 cookie, bool mgmt_tx)
2716 {
2717         struct ieee80211_roc_work *roc, *tmp, *found = NULL;
2718         int ret;
2719
2720         mutex_lock(&local->mtx);
2721         list_for_each_entry_safe(roc, tmp, &local->roc_list, list) {
2722                 struct ieee80211_roc_work *dep, *tmp2;
2723
2724                 list_for_each_entry_safe(dep, tmp2, &roc->dependents, list) {
2725                         if (!mgmt_tx && dep->cookie != cookie)
2726                                 continue;
2727                         else if (mgmt_tx && dep->mgmt_tx_cookie != cookie)
2728                                 continue;
2729                         /* found dependent item -- just remove it */
2730                         list_del(&dep->list);
2731                         mutex_unlock(&local->mtx);
2732
2733                         ieee80211_roc_notify_destroy(dep, true);
2734                         return 0;
2735                 }
2736
2737                 if (!mgmt_tx && roc->cookie != cookie)
2738                         continue;
2739                 else if (mgmt_tx && roc->mgmt_tx_cookie != cookie)
2740                         continue;
2741
2742                 found = roc;
2743                 break;
2744         }
2745
2746         if (!found) {
2747                 mutex_unlock(&local->mtx);
2748                 return -ENOENT;
2749         }
2750
2751         /*
2752          * We found the item to cancel, so do that. Note that it
2753          * may have dependents, which we also cancel (and send
2754          * the expired signal for.) Not doing so would be quite
2755          * tricky here, but we may need to fix it later.
2756          */
2757
2758         if (local->ops->remain_on_channel) {
2759                 if (found->started) {
2760                         ret = drv_cancel_remain_on_channel(local);
2761                         if (WARN_ON_ONCE(ret)) {
2762                                 mutex_unlock(&local->mtx);
2763                                 return ret;
2764                         }
2765                 }
2766
2767                 list_del(&found->list);
2768
2769                 if (found->started)
2770                         ieee80211_start_next_roc(local);
2771                 mutex_unlock(&local->mtx);
2772
2773                 ieee80211_roc_notify_destroy(found, true);
2774         } else {
2775                 /* work may be pending so use it all the time */
2776                 found->abort = true;
2777                 ieee80211_queue_delayed_work(&local->hw, &found->work, 0);
2778
2779                 mutex_unlock(&local->mtx);
2780
2781                 /* work will clean up etc */
2782                 flush_delayed_work(&found->work);
2783                 WARN_ON(!found->to_be_freed);
2784                 kfree(found);
2785         }
2786
2787         return 0;
2788 }
2789
2790 static int ieee80211_cancel_remain_on_channel(struct wiphy *wiphy,
2791                                               struct wireless_dev *wdev,
2792                                               u64 cookie)
2793 {
2794         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
2795         struct ieee80211_local *local = sdata->local;
2796
2797         return ieee80211_cancel_roc(local, cookie, false);
2798 }
2799
2800 static int ieee80211_start_radar_detection(struct wiphy *wiphy,
2801                                            struct net_device *dev,
2802                                            struct cfg80211_chan_def *chandef,
2803                                            u32 cac_time_ms)
2804 {
2805         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2806         struct ieee80211_local *local = sdata->local;
2807         int err;
2808
2809         mutex_lock(&local->mtx);
2810         if (!list_empty(&local->roc_list) || local->scanning) {
2811                 err = -EBUSY;
2812                 goto out_unlock;
2813         }
2814
2815         /* whatever, but channel contexts should not complain about that one */
2816         sdata->smps_mode = IEEE80211_SMPS_OFF;
2817         sdata->needed_rx_chains = local->rx_chains;
2818
2819         err = ieee80211_vif_use_channel(sdata, chandef,
2820                                         IEEE80211_CHANCTX_SHARED);
2821         if (err)
2822                 goto out_unlock;
2823
2824         ieee80211_queue_delayed_work(&sdata->local->hw,
2825                                      &sdata->dfs_cac_timer_work,
2826                                      msecs_to_jiffies(cac_time_ms));
2827
2828  out_unlock:
2829         mutex_unlock(&local->mtx);
2830         return err;
2831 }
2832
2833 static struct cfg80211_beacon_data *
2834 cfg80211_beacon_dup(struct cfg80211_beacon_data *beacon)
2835 {
2836         struct cfg80211_beacon_data *new_beacon;
2837         u8 *pos;
2838         int len;
2839
2840         len = beacon->head_len + beacon->tail_len + beacon->beacon_ies_len +
2841               beacon->proberesp_ies_len + beacon->assocresp_ies_len +
2842               beacon->probe_resp_len;
2843
2844         new_beacon = kzalloc(sizeof(*new_beacon) + len, GFP_KERNEL);
2845         if (!new_beacon)
2846                 return NULL;
2847
2848         pos = (u8 *)(new_beacon + 1);
2849         if (beacon->head_len) {
2850                 new_beacon->head_len = beacon->head_len;
2851                 new_beacon->head = pos;
2852                 memcpy(pos, beacon->head, beacon->head_len);
2853                 pos += beacon->head_len;
2854         }
2855         if (beacon->tail_len) {
2856                 new_beacon->tail_len = beacon->tail_len;
2857                 new_beacon->tail = pos;
2858                 memcpy(pos, beacon->tail, beacon->tail_len);
2859                 pos += beacon->tail_len;
2860         }
2861         if (beacon->beacon_ies_len) {
2862                 new_beacon->beacon_ies_len = beacon->beacon_ies_len;
2863                 new_beacon->beacon_ies = pos;
2864                 memcpy(pos, beacon->beacon_ies, beacon->beacon_ies_len);
2865                 pos += beacon->beacon_ies_len;
2866         }
2867         if (beacon->proberesp_ies_len) {
2868                 new_beacon->proberesp_ies_len = beacon->proberesp_ies_len;
2869                 new_beacon->proberesp_ies = pos;
2870                 memcpy(pos, beacon->proberesp_ies, beacon->proberesp_ies_len);
2871                 pos += beacon->proberesp_ies_len;
2872         }
2873         if (beacon->assocresp_ies_len) {
2874                 new_beacon->assocresp_ies_len = beacon->assocresp_ies_len;
2875                 new_beacon->assocresp_ies = pos;
2876                 memcpy(pos, beacon->assocresp_ies, beacon->assocresp_ies_len);
2877                 pos += beacon->assocresp_ies_len;
2878         }
2879         if (beacon->probe_resp_len) {
2880                 new_beacon->probe_resp_len = beacon->probe_resp_len;
2881                 beacon->probe_resp = pos;
2882                 memcpy(pos, beacon->probe_resp, beacon->probe_resp_len);
2883                 pos += beacon->probe_resp_len;
2884         }
2885
2886         return new_beacon;
2887 }
2888
2889 void ieee80211_csa_finish(struct ieee80211_vif *vif)
2890 {
2891         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2892
2893         ieee80211_queue_work(&sdata->local->hw,
2894                              &sdata->csa_finalize_work);
2895 }
2896 EXPORT_SYMBOL(ieee80211_csa_finish);
2897
2898 static int ieee80211_set_after_csa_beacon(struct ieee80211_sub_if_data *sdata,
2899                                           u32 *changed)
2900 {
2901         int err;
2902
2903         switch (sdata->vif.type) {
2904         case NL80211_IFTYPE_AP:
2905                 err = ieee80211_assign_beacon(sdata, sdata->u.ap.next_beacon,
2906                                               NULL);
2907                 kfree(sdata->u.ap.next_beacon);
2908                 sdata->u.ap.next_beacon = NULL;
2909
2910                 if (err < 0)
2911                         return err;
2912                 *changed |= err;
2913                 break;
2914         case NL80211_IFTYPE_ADHOC:
2915                 err = ieee80211_ibss_finish_csa(sdata);
2916                 if (err < 0)
2917                         return err;
2918                 *changed |= err;
2919                 break;
2920 #ifdef CONFIG_MAC80211_MESH
2921         case NL80211_IFTYPE_MESH_POINT:
2922                 err = ieee80211_mesh_finish_csa(sdata);
2923                 if (err < 0)
2924                         return err;
2925                 *changed |= err;
2926                 break;
2927 #endif
2928         default:
2929                 WARN_ON(1);
2930                 return -EINVAL;
2931         }
2932
2933         return 0;
2934 }
2935
2936 static int __ieee80211_csa_finalize(struct ieee80211_sub_if_data *sdata)
2937 {
2938         struct ieee80211_local *local = sdata->local;
2939         u32 changed = 0;
2940         int err;
2941
2942         sdata_assert_lock(sdata);
2943         lockdep_assert_held(&local->mtx);
2944         lockdep_assert_held(&local->chanctx_mtx);
2945
2946         /*
2947          * using reservation isn't immediate as it may be deferred until later
2948          * with multi-vif. once reservation is complete it will re-schedule the
2949          * work with no reserved_chanctx so verify chandef to check if it
2950          * completed successfully
2951          */
2952
2953         if (sdata->reserved_chanctx) {
2954                 /*
2955                  * with multi-vif csa driver may call ieee80211_csa_finish()
2956                  * many times while waiting for other interfaces to use their
2957                  * reservations
2958                  */
2959                 if (sdata->reserved_ready)
2960                         return 0;
2961
2962                 return ieee80211_vif_use_reserved_context(sdata);
2963         }
2964
2965         if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
2966                                         &sdata->csa_chandef))
2967                 return -EINVAL;
2968
2969         sdata->vif.csa_active = false;
2970
2971         err = ieee80211_set_after_csa_beacon(sdata, &changed);
2972         if (err)
2973                 return err;
2974
2975         ieee80211_bss_info_change_notify(sdata, changed);
2976
2977         if (sdata->csa_block_tx) {
2978                 ieee80211_wake_vif_queues(local, sdata,
2979                                           IEEE80211_QUEUE_STOP_REASON_CSA);
2980                 sdata->csa_block_tx = false;
2981         }
2982
2983         err = drv_post_channel_switch(sdata);
2984         if (err)
2985                 return err;
2986
2987         cfg80211_ch_switch_notify(sdata->dev, &sdata->csa_chandef);
2988
2989         return 0;
2990 }
2991
2992 static void ieee80211_csa_finalize(struct ieee80211_sub_if_data *sdata)
2993 {
2994         if (__ieee80211_csa_finalize(sdata)) {
2995                 sdata_info(sdata, "failed to finalize CSA, disconnecting\n");
2996                 cfg80211_stop_iface(sdata->local->hw.wiphy, &sdata->wdev,
2997                                     GFP_KERNEL);
2998         }
2999 }
3000
3001 void ieee80211_csa_finalize_work(struct work_struct *work)
3002 {
3003         struct ieee80211_sub_if_data *sdata =
3004                 container_of(work, struct ieee80211_sub_if_data,
3005                              csa_finalize_work);
3006         struct ieee80211_local *local = sdata->local;
3007
3008         sdata_lock(sdata);
3009         mutex_lock(&local->mtx);
3010         mutex_lock(&local->chanctx_mtx);
3011
3012         /* AP might have been stopped while waiting for the lock. */
3013         if (!sdata->vif.csa_active)
3014                 goto unlock;
3015
3016         if (!ieee80211_sdata_running(sdata))
3017                 goto unlock;
3018
3019         ieee80211_csa_finalize(sdata);
3020
3021 unlock:
3022         mutex_unlock(&local->chanctx_mtx);
3023         mutex_unlock(&local->mtx);
3024         sdata_unlock(sdata);
3025 }
3026
3027 static int ieee80211_set_csa_beacon(struct ieee80211_sub_if_data *sdata,
3028                                     struct cfg80211_csa_settings *params,
3029                                     u32 *changed)
3030 {
3031         struct ieee80211_csa_settings csa = {};
3032         int err;
3033
3034         switch (sdata->vif.type) {
3035         case NL80211_IFTYPE_AP:
3036                 sdata->u.ap.next_beacon =
3037                         cfg80211_beacon_dup(&params->beacon_after);
3038                 if (!sdata->u.ap.next_beacon)
3039                         return -ENOMEM;
3040
3041                 /*
3042                  * With a count of 0, we don't have to wait for any
3043                  * TBTT before switching, so complete the CSA
3044                  * immediately.  In theory, with a count == 1 we
3045                  * should delay the switch until just before the next
3046                  * TBTT, but that would complicate things so we switch
3047                  * immediately too.  If we would delay the switch
3048                  * until the next TBTT, we would have to set the probe
3049                  * response here.
3050                  *
3051                  * TODO: A channel switch with count <= 1 without
3052                  * sending a CSA action frame is kind of useless,
3053                  * because the clients won't know we're changing
3054                  * channels.  The action frame must be implemented
3055                  * either here or in the userspace.
3056                  */
3057                 if (params->count <= 1)
3058                         break;
3059
3060                 if ((params->n_counter_offsets_beacon >
3061                      IEEE80211_MAX_CSA_COUNTERS_NUM) ||
3062                     (params->n_counter_offsets_presp >
3063                      IEEE80211_MAX_CSA_COUNTERS_NUM))
3064                         return -EINVAL;
3065
3066                 csa.counter_offsets_beacon = params->counter_offsets_beacon;
3067                 csa.counter_offsets_presp = params->counter_offsets_presp;
3068                 csa.n_counter_offsets_beacon = params->n_counter_offsets_beacon;
3069                 csa.n_counter_offsets_presp = params->n_counter_offsets_presp;
3070                 csa.count = params->count;
3071
3072                 err = ieee80211_assign_beacon(sdata, &params->beacon_csa, &csa);
3073                 if (err < 0) {
3074                         kfree(sdata->u.ap.next_beacon);
3075                         return err;
3076                 }
3077                 *changed |= err;
3078
3079                 break;
3080         case NL80211_IFTYPE_ADHOC:
3081                 if (!sdata->vif.bss_conf.ibss_joined)
3082                         return -EINVAL;
3083
3084                 if (params->chandef.width != sdata->u.ibss.chandef.width)
3085                         return -EINVAL;
3086
3087                 switch (params->chandef.width) {
3088                 case NL80211_CHAN_WIDTH_40:
3089                         if (cfg80211_get_chandef_type(&params->chandef) !=
3090                             cfg80211_get_chandef_type(&sdata->u.ibss.chandef))
3091                                 return -EINVAL;
3092                 case NL80211_CHAN_WIDTH_5:
3093                 case NL80211_CHAN_WIDTH_10:
3094                 case NL80211_CHAN_WIDTH_20_NOHT:
3095                 case NL80211_CHAN_WIDTH_20:
3096                         break;
3097                 default:
3098                         return -EINVAL;
3099                 }
3100
3101                 /* changes into another band are not supported */
3102                 if (sdata->u.ibss.chandef.chan->band !=
3103                     params->chandef.chan->band)
3104                         return -EINVAL;
3105
3106                 /* see comments in the NL80211_IFTYPE_AP block */
3107                 if (params->count > 1) {
3108                         err = ieee80211_ibss_csa_beacon(sdata, params);
3109                         if (err < 0)
3110                                 return err;
3111                         *changed |= err;
3112                 }
3113
3114                 ieee80211_send_action_csa(sdata, params);
3115
3116                 break;
3117 #ifdef CONFIG_MAC80211_MESH
3118         case NL80211_IFTYPE_MESH_POINT: {
3119                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3120
3121                 if (params->chandef.width != sdata->vif.bss_conf.chandef.width)
3122                         return -EINVAL;
3123
3124                 /* changes into another band are not supported */
3125                 if (sdata->vif.bss_conf.chandef.chan->band !=
3126                     params->chandef.chan->band)
3127                         return -EINVAL;
3128
3129                 if (ifmsh->csa_role == IEEE80211_MESH_CSA_ROLE_NONE) {
3130                         ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_INIT;
3131                         if (!ifmsh->pre_value)
3132                                 ifmsh->pre_value = 1;
3133                         else
3134                                 ifmsh->pre_value++;
3135                 }
3136
3137                 /* see comments in the NL80211_IFTYPE_AP block */
3138                 if (params->count > 1) {
3139                         err = ieee80211_mesh_csa_beacon(sdata, params);
3140                         if (err < 0) {
3141                                 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE;
3142                                 return err;
3143                         }
3144                         *changed |= err;
3145                 }
3146
3147                 if (ifmsh->csa_role == IEEE80211_MESH_CSA_ROLE_INIT)
3148                         ieee80211_send_action_csa(sdata, params);
3149
3150                 break;
3151                 }
3152 #endif
3153         default:
3154                 return -EOPNOTSUPP;
3155         }
3156
3157         return 0;
3158 }
3159
3160 static int
3161 __ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev,
3162                            struct cfg80211_csa_settings *params)
3163 {
3164         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3165         struct ieee80211_local *local = sdata->local;
3166         struct ieee80211_channel_switch ch_switch;
3167         struct ieee80211_chanctx_conf *conf;
3168         struct ieee80211_chanctx *chanctx;
3169         u32 changed = 0;
3170         int err;
3171
3172         sdata_assert_lock(sdata);
3173         lockdep_assert_held(&local->mtx);
3174
3175         if (!list_empty(&local->roc_list) || local->scanning)
3176                 return -EBUSY;
3177
3178         if (sdata->wdev.cac_started)
3179                 return -EBUSY;
3180
3181         if (cfg80211_chandef_identical(&params->chandef,
3182                                        &sdata->vif.bss_conf.chandef))
3183                 return -EINVAL;
3184
3185         /* don't allow another channel switch if one is already active. */
3186         if (sdata->vif.csa_active)
3187                 return -EBUSY;
3188
3189         mutex_lock(&local->chanctx_mtx);
3190         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
3191                                          lockdep_is_held(&local->chanctx_mtx));
3192         if (!conf) {
3193                 err = -EBUSY;
3194                 goto out;
3195         }
3196
3197         chanctx = container_of(conf, struct ieee80211_chanctx, conf);
3198         if (!chanctx) {
3199                 err = -EBUSY;
3200                 goto out;
3201         }
3202
3203         ch_switch.timestamp = 0;
3204         ch_switch.device_timestamp = 0;
3205         ch_switch.block_tx = params->block_tx;
3206         ch_switch.chandef = params->chandef;
3207         ch_switch.count = params->count;
3208
3209         err = drv_pre_channel_switch(sdata, &ch_switch);
3210         if (err)
3211                 goto out;
3212
3213         err = ieee80211_vif_reserve_chanctx(sdata, &params->chandef,
3214                                             chanctx->mode,
3215                                             params->radar_required);
3216         if (err)
3217                 goto out;
3218
3219         /* if reservation is invalid then this will fail */
3220         err = ieee80211_check_combinations(sdata, NULL, chanctx->mode, 0);
3221         if (err) {
3222                 ieee80211_vif_unreserve_chanctx(sdata);
3223                 goto out;
3224         }
3225
3226         err = ieee80211_set_csa_beacon(sdata, params, &changed);
3227         if (err) {
3228                 ieee80211_vif_unreserve_chanctx(sdata);
3229                 goto out;
3230         }
3231
3232         sdata->csa_chandef = params->chandef;
3233         sdata->csa_block_tx = params->block_tx;
3234         sdata->vif.csa_active = true;
3235
3236         if (sdata->csa_block_tx)
3237                 ieee80211_stop_vif_queues(local, sdata,
3238                                           IEEE80211_QUEUE_STOP_REASON_CSA);
3239
3240         cfg80211_ch_switch_started_notify(sdata->dev, &sdata->csa_chandef,
3241                                           params->count);
3242
3243         if (changed) {
3244                 ieee80211_bss_info_change_notify(sdata, changed);
3245                 drv_channel_switch_beacon(sdata, &params->chandef);
3246         } else {
3247                 /* if the beacon didn't change, we can finalize immediately */
3248                 ieee80211_csa_finalize(sdata);
3249         }
3250
3251 out:
3252         mutex_unlock(&local->chanctx_mtx);
3253         return err;
3254 }
3255
3256 int ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev,
3257                              struct cfg80211_csa_settings *params)
3258 {
3259         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3260         struct ieee80211_local *local = sdata->local;
3261         int err;
3262
3263         mutex_lock(&local->mtx);
3264         err = __ieee80211_channel_switch(wiphy, dev, params);
3265         mutex_unlock(&local->mtx);
3266
3267         return err;
3268 }
3269
3270 static struct sk_buff *ieee80211_make_ack_skb(struct ieee80211_local *local,
3271                                               struct sk_buff *skb, u64 *cookie,
3272                                               gfp_t gfp)
3273 {
3274         unsigned long spin_flags;
3275         struct sk_buff *ack_skb;
3276         int id;
3277
3278         ack_skb = skb_copy(skb, gfp);
3279         if (!ack_skb)
3280                 return ERR_PTR(-ENOMEM);
3281
3282         spin_lock_irqsave(&local->ack_status_lock, spin_flags);
3283         id = idr_alloc(&local->ack_status_frames, ack_skb,
3284                        1, 0x10000, GFP_ATOMIC);
3285         spin_unlock_irqrestore(&local->ack_status_lock, spin_flags);
3286
3287         if (id < 0) {
3288                 kfree_skb(ack_skb);
3289                 return ERR_PTR(-ENOMEM);
3290         }
3291
3292         IEEE80211_SKB_CB(skb)->ack_frame_id = id;
3293
3294         *cookie = ieee80211_mgmt_tx_cookie(local);
3295         IEEE80211_SKB_CB(ack_skb)->ack.cookie = *cookie;
3296
3297         return ack_skb;
3298 }
3299
3300 static int ieee80211_mgmt_tx(struct wiphy *wiphy, struct wireless_dev *wdev,
3301                              struct cfg80211_mgmt_tx_params *params,
3302                              u64 *cookie)
3303 {
3304         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
3305         struct ieee80211_local *local = sdata->local;
3306         struct sk_buff *skb, *ack_skb;
3307         struct sta_info *sta;
3308         const struct ieee80211_mgmt *mgmt = (void *)params->buf;
3309         bool need_offchan = false;
3310         u32 flags;
3311         int ret;
3312         u8 *data;
3313
3314         if (params->dont_wait_for_ack)
3315                 flags = IEEE80211_TX_CTL_NO_ACK;
3316         else
3317                 flags = IEEE80211_TX_INTFL_NL80211_FRAME_TX |
3318                         IEEE80211_TX_CTL_REQ_TX_STATUS;
3319
3320         if (params->no_cck)
3321                 flags |= IEEE80211_TX_CTL_NO_CCK_RATE;
3322
3323         switch (sdata->vif.type) {
3324         case NL80211_IFTYPE_ADHOC:
3325                 if (!sdata->vif.bss_conf.ibss_joined)
3326                         need_offchan = true;
3327                 /* fall through */
3328 #ifdef CONFIG_MAC80211_MESH
3329         case NL80211_IFTYPE_MESH_POINT:
3330                 if (ieee80211_vif_is_mesh(&sdata->vif) &&
3331                     !sdata->u.mesh.mesh_id_len)
3332                         need_offchan = true;
3333                 /* fall through */
3334 #endif
3335         case NL80211_IFTYPE_AP:
3336         case NL80211_IFTYPE_AP_VLAN:
3337         case NL80211_IFTYPE_P2P_GO:
3338                 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3339                     !ieee80211_vif_is_mesh(&sdata->vif) &&
3340                     !rcu_access_pointer(sdata->bss->beacon))
3341                         need_offchan = true;
3342                 if (!ieee80211_is_action(mgmt->frame_control) ||
3343                     mgmt->u.action.category == WLAN_CATEGORY_PUBLIC ||
3344                     mgmt->u.action.category == WLAN_CATEGORY_SELF_PROTECTED ||
3345                     mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT)
3346                         break;
3347                 rcu_read_lock();
3348                 sta = sta_info_get(sdata, mgmt->da);
3349                 rcu_read_unlock();
3350                 if (!sta)
3351                         return -ENOLINK;
3352                 break;
3353         case NL80211_IFTYPE_STATION:
3354         case NL80211_IFTYPE_P2P_CLIENT:
3355                 sdata_lock(sdata);
3356                 if (!sdata->u.mgd.associated ||
3357                     (params->offchan && params->wait &&
3358                      local->ops->remain_on_channel &&
3359                      memcmp(sdata->u.mgd.associated->bssid,
3360                             mgmt->bssid, ETH_ALEN)))
3361                         need_offchan = true;
3362                 sdata_unlock(sdata);
3363                 break;
3364         case NL80211_IFTYPE_P2P_DEVICE:
3365                 need_offchan = true;
3366                 break;
3367         default:
3368                 return -EOPNOTSUPP;
3369         }
3370
3371         /* configurations requiring offchan cannot work if no channel has been
3372          * specified
3373          */
3374         if (need_offchan && !params->chan)
3375                 return -EINVAL;
3376
3377         mutex_lock(&local->mtx);
3378
3379         /* Check if the operating channel is the requested channel */
3380         if (!need_offchan) {
3381                 struct ieee80211_chanctx_conf *chanctx_conf;
3382
3383                 rcu_read_lock();
3384                 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3385
3386                 if (chanctx_conf) {
3387                         need_offchan = params->chan &&
3388                                        (params->chan !=
3389                                         chanctx_conf->def.chan);
3390                 } else if (!params->chan) {
3391                         ret = -EINVAL;
3392                         rcu_read_unlock();
3393                         goto out_unlock;
3394                 } else {
3395                         need_offchan = true;
3396                 }
3397                 rcu_read_unlock();
3398         }
3399
3400         if (need_offchan && !params->offchan) {
3401                 ret = -EBUSY;
3402                 goto out_unlock;
3403         }
3404
3405         skb = dev_alloc_skb(local->hw.extra_tx_headroom + params->len);
3406         if (!skb) {
3407                 ret = -ENOMEM;
3408                 goto out_unlock;
3409         }
3410         skb_reserve(skb, local->hw.extra_tx_headroom);
3411
3412         data = skb_put(skb, params->len);
3413         memcpy(data, params->buf, params->len);
3414
3415         /* Update CSA counters */
3416         if (sdata->vif.csa_active &&
3417             (sdata->vif.type == NL80211_IFTYPE_AP ||
3418              sdata->vif.type == NL80211_IFTYPE_MESH_POINT ||
3419              sdata->vif.type == NL80211_IFTYPE_ADHOC) &&
3420             params->n_csa_offsets) {
3421                 int i;
3422                 struct beacon_data *beacon = NULL;
3423
3424                 rcu_read_lock();
3425
3426                 if (sdata->vif.type == NL80211_IFTYPE_AP)
3427                         beacon = rcu_dereference(sdata->u.ap.beacon);
3428                 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
3429                         beacon = rcu_dereference(sdata->u.ibss.presp);
3430                 else if (ieee80211_vif_is_mesh(&sdata->vif))
3431                         beacon = rcu_dereference(sdata->u.mesh.beacon);
3432
3433                 if (beacon)
3434                         for (i = 0; i < params->n_csa_offsets; i++)
3435                                 data[params->csa_offsets[i]] =
3436                                         beacon->csa_current_counter;
3437
3438                 rcu_read_unlock();
3439         }
3440
3441         IEEE80211_SKB_CB(skb)->flags = flags;
3442
3443         skb->dev = sdata->dev;
3444
3445         if (!params->dont_wait_for_ack) {
3446                 /* make a copy to preserve the frame contents
3447                  * in case of encryption.
3448                  */
3449                 ack_skb = ieee80211_make_ack_skb(local, skb, cookie,
3450                                                  GFP_KERNEL);
3451                 if (IS_ERR(ack_skb)) {
3452                         ret = PTR_ERR(ack_skb);
3453                         kfree_skb(skb);
3454                         goto out_unlock;
3455                 }
3456         } else {
3457                 /* for cookie below */
3458                 ack_skb = skb;
3459         }
3460
3461         if (!need_offchan) {
3462                 ieee80211_tx_skb(sdata, skb);
3463                 ret = 0;
3464                 goto out_unlock;
3465         }
3466
3467         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_TX_OFFCHAN |
3468                                         IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
3469         if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
3470                 IEEE80211_SKB_CB(skb)->hw_queue =
3471                         local->hw.offchannel_tx_hw_queue;
3472
3473         /* This will handle all kinds of coalescing and immediate TX */
3474         ret = ieee80211_start_roc_work(local, sdata, params->chan,
3475                                        params->wait, cookie, skb,
3476                                        IEEE80211_ROC_TYPE_MGMT_TX);
3477         if (ret)
3478                 kfree_skb(skb);
3479  out_unlock:
3480         mutex_unlock(&local->mtx);
3481         return ret;
3482 }
3483
3484 static int ieee80211_mgmt_tx_cancel_wait(struct wiphy *wiphy,
3485                                          struct wireless_dev *wdev,
3486                                          u64 cookie)
3487 {
3488         struct ieee80211_local *local = wiphy_priv(wiphy);
3489
3490         return ieee80211_cancel_roc(local, cookie, true);
3491 }
3492
3493 static void ieee80211_mgmt_frame_register(struct wiphy *wiphy,
3494                                           struct wireless_dev *wdev,
3495                                           u16 frame_type, bool reg)
3496 {
3497         struct ieee80211_local *local = wiphy_priv(wiphy);
3498         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
3499
3500         switch (frame_type) {
3501         case IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_PROBE_REQ:
3502                 if (reg) {
3503                         local->probe_req_reg++;
3504                         sdata->vif.probe_req_reg++;
3505                 } else {
3506                         if (local->probe_req_reg)
3507                                 local->probe_req_reg--;
3508
3509                         if (sdata->vif.probe_req_reg)
3510                                 sdata->vif.probe_req_reg--;
3511                 }
3512
3513                 if (!local->open_count)
3514                         break;
3515
3516                 if (sdata->vif.probe_req_reg == 1)
3517                         drv_config_iface_filter(local, sdata, FIF_PROBE_REQ,
3518                                                 FIF_PROBE_REQ);
3519                 else if (sdata->vif.probe_req_reg == 0)
3520                         drv_config_iface_filter(local, sdata, 0,
3521                                                 FIF_PROBE_REQ);
3522
3523                 ieee80211_configure_filter(local);
3524                 break;
3525         default:
3526                 break;
3527         }
3528 }
3529
3530 static int ieee80211_set_antenna(struct wiphy *wiphy, u32 tx_ant, u32 rx_ant)
3531 {
3532         struct ieee80211_local *local = wiphy_priv(wiphy);
3533
3534         if (local->started)
3535                 return -EOPNOTSUPP;
3536
3537         return drv_set_antenna(local, tx_ant, rx_ant);
3538 }
3539
3540 static int ieee80211_get_antenna(struct wiphy *wiphy, u32 *tx_ant, u32 *rx_ant)
3541 {
3542         struct ieee80211_local *local = wiphy_priv(wiphy);
3543
3544         return drv_get_antenna(local, tx_ant, rx_ant);
3545 }
3546
3547 static int ieee80211_set_rekey_data(struct wiphy *wiphy,
3548                                     struct net_device *dev,
3549                                     struct cfg80211_gtk_rekey_data *data)
3550 {
3551         struct ieee80211_local *local = wiphy_priv(wiphy);
3552         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3553
3554         if (!local->ops->set_rekey_data)
3555                 return -EOPNOTSUPP;
3556
3557         drv_set_rekey_data(local, sdata, data);
3558
3559         return 0;
3560 }
3561
3562 static int ieee80211_probe_client(struct wiphy *wiphy, struct net_device *dev,
3563                                   const u8 *peer, u64 *cookie)
3564 {
3565         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3566         struct ieee80211_local *local = sdata->local;
3567         struct ieee80211_qos_hdr *nullfunc;
3568         struct sk_buff *skb, *ack_skb;
3569         int size = sizeof(*nullfunc);
3570         __le16 fc;
3571         bool qos;
3572         struct ieee80211_tx_info *info;
3573         struct sta_info *sta;
3574         struct ieee80211_chanctx_conf *chanctx_conf;
3575         enum ieee80211_band band;
3576         int ret;
3577
3578         /* the lock is needed to assign the cookie later */
3579         mutex_lock(&local->mtx);
3580
3581         rcu_read_lock();
3582         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3583         if (WARN_ON(!chanctx_conf)) {
3584                 ret = -EINVAL;
3585                 goto unlock;
3586         }
3587         band = chanctx_conf->def.chan->band;
3588         sta = sta_info_get_bss(sdata, peer);
3589         if (sta) {
3590                 qos = sta->sta.wme;
3591         } else {
3592                 ret = -ENOLINK;
3593                 goto unlock;
3594         }
3595
3596         if (qos) {
3597                 fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
3598                                  IEEE80211_STYPE_QOS_NULLFUNC |
3599                                  IEEE80211_FCTL_FROMDS);
3600         } else {
3601                 size -= 2;
3602                 fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
3603                                  IEEE80211_STYPE_NULLFUNC |
3604                                  IEEE80211_FCTL_FROMDS);
3605         }
3606
3607         skb = dev_alloc_skb(local->hw.extra_tx_headroom + size);
3608         if (!skb) {
3609                 ret = -ENOMEM;
3610                 goto unlock;
3611         }
3612
3613         skb->dev = dev;
3614
3615         skb_reserve(skb, local->hw.extra_tx_headroom);
3616
3617         nullfunc = (void *) skb_put(skb, size);
3618         nullfunc->frame_control = fc;
3619         nullfunc->duration_id = 0;
3620         memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN);
3621         memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
3622         memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN);
3623         nullfunc->seq_ctrl = 0;
3624
3625         info = IEEE80211_SKB_CB(skb);
3626
3627         info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
3628                        IEEE80211_TX_INTFL_NL80211_FRAME_TX;
3629         info->band = band;
3630
3631         skb_set_queue_mapping(skb, IEEE80211_AC_VO);
3632         skb->priority = 7;
3633         if (qos)
3634                 nullfunc->qos_ctrl = cpu_to_le16(7);
3635
3636         ack_skb = ieee80211_make_ack_skb(local, skb, cookie, GFP_ATOMIC);
3637         if (IS_ERR(ack_skb)) {
3638                 kfree_skb(skb);
3639                 ret = PTR_ERR(ack_skb);
3640                 goto unlock;
3641         }
3642
3643         local_bh_disable();
3644         ieee80211_xmit(sdata, sta, skb);
3645         local_bh_enable();
3646
3647         ret = 0;
3648 unlock:
3649         rcu_read_unlock();
3650         mutex_unlock(&local->mtx);
3651
3652         return ret;
3653 }
3654
3655 static int ieee80211_cfg_get_channel(struct wiphy *wiphy,
3656                                      struct wireless_dev *wdev,
3657                                      struct cfg80211_chan_def *chandef)
3658 {
3659         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
3660         struct ieee80211_local *local = wiphy_priv(wiphy);
3661         struct ieee80211_chanctx_conf *chanctx_conf;
3662         int ret = -ENODATA;
3663
3664         rcu_read_lock();
3665         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3666         if (chanctx_conf) {
3667                 *chandef = sdata->vif.bss_conf.chandef;
3668                 ret = 0;
3669         } else if (local->open_count > 0 &&
3670                    local->open_count == local->monitors &&
3671                    sdata->vif.type == NL80211_IFTYPE_MONITOR) {
3672                 if (local->use_chanctx)
3673                         *chandef = local->monitor_chandef;
3674                 else
3675                         *chandef = local->_oper_chandef;
3676                 ret = 0;
3677         }
3678         rcu_read_unlock();
3679
3680         return ret;
3681 }
3682
3683 #ifdef CONFIG_PM
3684 static void ieee80211_set_wakeup(struct wiphy *wiphy, bool enabled)
3685 {
3686         drv_set_wakeup(wiphy_priv(wiphy), enabled);
3687 }
3688 #endif
3689
3690 static int ieee80211_set_qos_map(struct wiphy *wiphy,
3691                                  struct net_device *dev,
3692                                  struct cfg80211_qos_map *qos_map)
3693 {
3694         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3695         struct mac80211_qos_map *new_qos_map, *old_qos_map;
3696
3697         if (qos_map) {
3698                 new_qos_map = kzalloc(sizeof(*new_qos_map), GFP_KERNEL);
3699                 if (!new_qos_map)
3700                         return -ENOMEM;
3701                 memcpy(&new_qos_map->qos_map, qos_map, sizeof(*qos_map));
3702         } else {
3703                 /* A NULL qos_map was passed to disable QoS mapping */
3704                 new_qos_map = NULL;
3705         }
3706
3707         old_qos_map = sdata_dereference(sdata->qos_map, sdata);
3708         rcu_assign_pointer(sdata->qos_map, new_qos_map);
3709         if (old_qos_map)
3710                 kfree_rcu(old_qos_map, rcu_head);
3711
3712         return 0;
3713 }
3714
3715 static int ieee80211_set_ap_chanwidth(struct wiphy *wiphy,
3716                                       struct net_device *dev,
3717                                       struct cfg80211_chan_def *chandef)
3718 {
3719         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3720         int ret;
3721         u32 changed = 0;
3722
3723         ret = ieee80211_vif_change_bandwidth(sdata, chandef, &changed);
3724         if (ret == 0)
3725                 ieee80211_bss_info_change_notify(sdata, changed);
3726
3727         return ret;
3728 }
3729
3730 static int ieee80211_add_tx_ts(struct wiphy *wiphy, struct net_device *dev,
3731                                u8 tsid, const u8 *peer, u8 up,
3732                                u16 admitted_time)
3733 {
3734         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3735         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3736         int ac = ieee802_1d_to_ac[up];
3737
3738         if (sdata->vif.type != NL80211_IFTYPE_STATION)
3739                 return -EOPNOTSUPP;
3740
3741         if (!(sdata->wmm_acm & BIT(up)))
3742                 return -EINVAL;
3743
3744         if (ifmgd->tx_tspec[ac].admitted_time)
3745                 return -EBUSY;
3746
3747         if (admitted_time) {
3748                 ifmgd->tx_tspec[ac].admitted_time = 32 * admitted_time;
3749                 ifmgd->tx_tspec[ac].tsid = tsid;
3750                 ifmgd->tx_tspec[ac].up = up;
3751         }
3752
3753         return 0;
3754 }
3755
3756 static int ieee80211_del_tx_ts(struct wiphy *wiphy, struct net_device *dev,
3757                                u8 tsid, const u8 *peer)
3758 {
3759         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3760         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3761         struct ieee80211_local *local = wiphy_priv(wiphy);
3762         int ac;
3763
3764         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
3765                 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
3766
3767                 /* skip unused entries */
3768                 if (!tx_tspec->admitted_time)
3769                         continue;
3770
3771                 if (tx_tspec->tsid != tsid)
3772                         continue;
3773
3774                 /* due to this new packets will be reassigned to non-ACM ACs */
3775                 tx_tspec->up = -1;
3776
3777                 /* Make sure that all packets have been sent to avoid to
3778                  * restore the QoS params on packets that are still on the
3779                  * queues.
3780                  */
3781                 synchronize_net();
3782                 ieee80211_flush_queues(local, sdata, false);
3783
3784                 /* restore the normal QoS parameters
3785                  * (unconditionally to avoid races)
3786                  */
3787                 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
3788                 tx_tspec->downgraded = false;
3789                 ieee80211_sta_handle_tspec_ac_params(sdata);
3790
3791                 /* finally clear all the data */
3792                 memset(tx_tspec, 0, sizeof(*tx_tspec));
3793
3794                 return 0;
3795         }
3796
3797         return -ENOENT;
3798 }
3799
3800 const struct cfg80211_ops mac80211_config_ops = {
3801         .add_virtual_intf = ieee80211_add_iface,
3802         .del_virtual_intf = ieee80211_del_iface,
3803         .change_virtual_intf = ieee80211_change_iface,
3804         .start_p2p_device = ieee80211_start_p2p_device,
3805         .stop_p2p_device = ieee80211_stop_p2p_device,
3806         .add_key = ieee80211_add_key,
3807         .del_key = ieee80211_del_key,
3808         .get_key = ieee80211_get_key,
3809         .set_default_key = ieee80211_config_default_key,
3810         .set_default_mgmt_key = ieee80211_config_default_mgmt_key,
3811         .start_ap = ieee80211_start_ap,
3812         .change_beacon = ieee80211_change_beacon,
3813         .stop_ap = ieee80211_stop_ap,
3814         .add_station = ieee80211_add_station,
3815         .del_station = ieee80211_del_station,
3816         .change_station = ieee80211_change_station,
3817         .get_station = ieee80211_get_station,
3818         .dump_station = ieee80211_dump_station,
3819         .dump_survey = ieee80211_dump_survey,
3820 #ifdef CONFIG_MAC80211_MESH
3821         .add_mpath = ieee80211_add_mpath,
3822         .del_mpath = ieee80211_del_mpath,
3823         .change_mpath = ieee80211_change_mpath,
3824         .get_mpath = ieee80211_get_mpath,
3825         .dump_mpath = ieee80211_dump_mpath,
3826         .get_mpp = ieee80211_get_mpp,
3827         .dump_mpp = ieee80211_dump_mpp,
3828         .update_mesh_config = ieee80211_update_mesh_config,
3829         .get_mesh_config = ieee80211_get_mesh_config,
3830         .join_mesh = ieee80211_join_mesh,
3831         .leave_mesh = ieee80211_leave_mesh,
3832 #endif
3833         .join_ocb = ieee80211_join_ocb,
3834         .leave_ocb = ieee80211_leave_ocb,
3835         .change_bss = ieee80211_change_bss,
3836         .set_txq_params = ieee80211_set_txq_params,
3837         .set_monitor_channel = ieee80211_set_monitor_channel,
3838         .suspend = ieee80211_suspend,
3839         .resume = ieee80211_resume,
3840         .scan = ieee80211_scan,
3841         .sched_scan_start = ieee80211_sched_scan_start,
3842         .sched_scan_stop = ieee80211_sched_scan_stop,
3843         .auth = ieee80211_auth,
3844         .assoc = ieee80211_assoc,
3845         .deauth = ieee80211_deauth,
3846         .disassoc = ieee80211_disassoc,
3847         .join_ibss = ieee80211_join_ibss,
3848         .leave_ibss = ieee80211_leave_ibss,
3849         .set_mcast_rate = ieee80211_set_mcast_rate,
3850         .set_wiphy_params = ieee80211_set_wiphy_params,
3851         .set_tx_power = ieee80211_set_tx_power,
3852         .get_tx_power = ieee80211_get_tx_power,
3853         .set_wds_peer = ieee80211_set_wds_peer,
3854         .rfkill_poll = ieee80211_rfkill_poll,
3855         CFG80211_TESTMODE_CMD(ieee80211_testmode_cmd)
3856         CFG80211_TESTMODE_DUMP(ieee80211_testmode_dump)
3857         .set_power_mgmt = ieee80211_set_power_mgmt,
3858         .set_bitrate_mask = ieee80211_set_bitrate_mask,
3859         .remain_on_channel = ieee80211_remain_on_channel,
3860         .cancel_remain_on_channel = ieee80211_cancel_remain_on_channel,
3861         .mgmt_tx = ieee80211_mgmt_tx,
3862         .mgmt_tx_cancel_wait = ieee80211_mgmt_tx_cancel_wait,
3863         .set_cqm_rssi_config = ieee80211_set_cqm_rssi_config,
3864         .mgmt_frame_register = ieee80211_mgmt_frame_register,
3865         .set_antenna = ieee80211_set_antenna,
3866         .get_antenna = ieee80211_get_antenna,
3867         .set_rekey_data = ieee80211_set_rekey_data,
3868         .tdls_oper = ieee80211_tdls_oper,
3869         .tdls_mgmt = ieee80211_tdls_mgmt,
3870         .tdls_channel_switch = ieee80211_tdls_channel_switch,
3871         .tdls_cancel_channel_switch = ieee80211_tdls_cancel_channel_switch,
3872         .probe_client = ieee80211_probe_client,
3873         .set_noack_map = ieee80211_set_noack_map,
3874 #ifdef CONFIG_PM
3875         .set_wakeup = ieee80211_set_wakeup,
3876 #endif
3877         .get_channel = ieee80211_cfg_get_channel,
3878         .start_radar_detection = ieee80211_start_radar_detection,
3879         .channel_switch = ieee80211_channel_switch,
3880         .set_qos_map = ieee80211_set_qos_map,
3881         .set_ap_chanwidth = ieee80211_set_ap_chanwidth,
3882         .add_tx_ts = ieee80211_add_tx_ts,
3883         .del_tx_ts = ieee80211_del_tx_ts,
3884 };