net/mac80211/iface.c

   1 /*
   2  * Interface handling
   3  *
   4  * Copyright 2002-2005, Instant802 Networks, Inc.
   5  * Copyright 2005-2006, Devicescape Software, Inc.
   6  * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
   7  * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13 #include <linux/slab.h>
  14 #include <linux/kernel.h>
  15 #include <linux/if_arp.h>
  16 #include <linux/netdevice.h>
  17 #include <linux/rtnetlink.h>
  18 #include <net/mac80211.h>
  19 #include <net/ieee80211_radiotap.h>
  20 #include "ieee80211_i.h"
  21 #include "sta_info.h"
  22 #include "debugfs_netdev.h"
  23 #include "mesh.h"
  24 #include "led.h"
  25 #include "driver-ops.h"
  26 #include "wme.h"
  27 #include "rate.h"
  28
  29 /**
  30  * DOC: Interface list locking
  31  *
  32  * The interface list in each struct ieee80211_local is protected
  33  * three-fold:
  34  *
  35  * (1) modifications may only be done under the RTNL
  36  * (2) modifications and readers are protected against each other by
  37  *     the iflist_mtx.
  38  * (3) modifications are done in an RCU manner so atomic readers
  39  *     can traverse the list in RCU-safe blocks.
  40  *
  41  * As a consequence, reads (traversals) of the list can be protected
  42  * by either the RTNL, the iflist_mtx or RCU.
  43  */
  44
  45 bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
  46 {
  47         struct ieee80211_chanctx_conf *chanctx_conf;
  48         int power;
  49
  50         rcu_read_lock();
  51         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
  52         if (!chanctx_conf) {
  53                 rcu_read_unlock();
  54                 return false;
  55         }
  56
  57         power = ieee80211_chandef_max_power(&chanctx_conf->def);
  58         rcu_read_unlock();
  59
  60         if (sdata->user_power_level != IEEE80211_UNSET_POWER_LEVEL)
  61                 power = min(power, sdata->user_power_level);
  62
  63         if (sdata->ap_power_level != IEEE80211_UNSET_POWER_LEVEL)
  64                 power = min(power, sdata->ap_power_level);
  65
  66         if (power != sdata->vif.bss_conf.txpower) {
  67                 sdata->vif.bss_conf.txpower = power;
  68                 ieee80211_hw_config(sdata->local, 0);
  69                 return true;
  70         }
  71
  72         return false;
  73 }
  74
  75 void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
  76 {
  77         if (__ieee80211_recalc_txpower(sdata))
  78                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER);
  79 }
  80
  81 static u32 __ieee80211_idle_off(struct ieee80211_local *local)
  82 {
  83         if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
  84                 return 0;
  85
  86         local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
  87         return IEEE80211_CONF_CHANGE_IDLE;
  88 }
  89
  90 static u32 __ieee80211_idle_on(struct ieee80211_local *local)
  91 {
  92         if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
  93                 return 0;
  94
  95         ieee80211_flush_queues(local, NULL);
  96
  97         local->hw.conf.flags |= IEEE80211_CONF_IDLE;
  98         return IEEE80211_CONF_CHANGE_IDLE;
  99 }
 100
 101 static u32 __ieee80211_recalc_idle(struct ieee80211_local *local,
 102                                    bool force_active)
 103 {
 104         bool working = false, scanning, active;
 105         unsigned int led_trig_start = 0, led_trig_stop = 0;
 106         struct ieee80211_roc_work *roc;
 107
 108         lockdep_assert_held(&local->mtx);
 109
 110         active = force_active ||
 111                  !list_empty(&local->chanctx_list) ||
 112                  local->monitors;
 113
 114         if (!local->ops->remain_on_channel) {
 115                 list_for_each_entry(roc, &local->roc_list, list) {
 116                         working = true;
 117                         break;
 118                 }
 119         }
 120
 121         scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
 122                    test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning);
 123
 124         if (working || scanning)
 125                 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
 126         else
 127                 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
 128
 129         if (active)
 130                 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
 131         else
 132                 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
 133
 134         ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
 135
 136         if (working || scanning || active)
 137                 return __ieee80211_idle_off(local);
 138         return __ieee80211_idle_on(local);
 139 }
 140
 141 u32 ieee80211_idle_off(struct ieee80211_local *local)
 142 {
 143         return __ieee80211_recalc_idle(local, true);
 144 }
 145
 146 void ieee80211_recalc_idle(struct ieee80211_local *local)
 147 {
 148         u32 change = __ieee80211_recalc_idle(local, false);
 149         if (change)
 150                 ieee80211_hw_config(local, change);
 151 }
 152
 153 static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
 154 {
 155         if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN)
 156                 return -EINVAL;
 157
 158         dev->mtu = new_mtu;
 159         return 0;
 160 }
 161
 162 static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr,
 163                                 bool check_dup)
 164 {
 165         struct ieee80211_local *local = sdata->local;
 166         struct ieee80211_sub_if_data *iter;
 167         u64 new, mask, tmp;
 168         u8 *m;
 169         int ret = 0;
 170
 171         if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
 172                 return 0;
 173
 174         m = addr;
 175         new =   ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
 176                 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
 177                 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
 178
 179         m = local->hw.wiphy->addr_mask;
 180         mask =  ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
 181                 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
 182                 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
 183
 184         if (!check_dup)
 185                 return ret;
 186
 187         mutex_lock(&local->iflist_mtx);
 188         list_for_each_entry(iter, &local->interfaces, list) {
 189                 if (iter == sdata)
 190                         continue;
 191
 192                 if (iter->vif.type == NL80211_IFTYPE_MONITOR &&
 193                     !(iter->u.mntr_flags & MONITOR_FLAG_ACTIVE))
 194                         continue;
 195
 196                 m = iter->vif.addr;
 197                 tmp =   ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
 198                         ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
 199                         ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
 200
 201                 if ((new & ~mask) != (tmp & ~mask)) {
 202                         ret = -EINVAL;
 203                         break;
 204                 }
 205         }
 206         mutex_unlock(&local->iflist_mtx);
 207
 208         return ret;
 209 }
 210
 211 static int ieee80211_change_mac(struct net_device *dev, void *addr)
 212 {
 213         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 214         struct sockaddr *sa = addr;
 215         bool check_dup = true;
 216         int ret;
 217
 218         if (ieee80211_sdata_running(sdata))
 219                 return -EBUSY;
 220
 221         if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
 222             !(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
 223                 check_dup = false;
 224
 225         ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup);
 226         if (ret)
 227                 return ret;
 228
 229         ret = eth_mac_addr(dev, sa);
 230
 231         if (ret == 0)
 232                 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
 233
 234         return ret;
 235 }
 236
 237 static inline int identical_mac_addr_allowed(int type1, int type2)
 238 {
 239         return type1 == NL80211_IFTYPE_MONITOR ||
 240                 type2 == NL80211_IFTYPE_MONITOR ||
 241                 type1 == NL80211_IFTYPE_P2P_DEVICE ||
 242                 type2 == NL80211_IFTYPE_P2P_DEVICE ||
 243                 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
 244                 (type1 == NL80211_IFTYPE_WDS &&
 245                         (type2 == NL80211_IFTYPE_WDS ||
 246                          type2 == NL80211_IFTYPE_AP)) ||
 247                 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
 248                 (type1 == NL80211_IFTYPE_AP_VLAN &&
 249                         (type2 == NL80211_IFTYPE_AP ||
 250                          type2 == NL80211_IFTYPE_AP_VLAN));
 251 }
 252
 253 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
 254                                             enum nl80211_iftype iftype)
 255 {
 256         struct ieee80211_local *local = sdata->local;
 257         struct ieee80211_sub_if_data *nsdata;
 258
 259         ASSERT_RTNL();
 260
 261         /* we hold the RTNL here so can safely walk the list */
 262         list_for_each_entry(nsdata, &local->interfaces, list) {
 263                 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
 264                         /*
 265                          * Allow only a single IBSS interface to be up at any
 266                          * time. This is restricted because beacon distribution
 267                          * cannot work properly if both are in the same IBSS.
 268                          *
 269                          * To remove this restriction we'd have to disallow them
 270                          * from setting the same SSID on different IBSS interfaces
 271                          * belonging to the same hardware. Then, however, we're
 272                          * faced with having to adopt two different TSF timers...
 273                          */
 274                         if (iftype == NL80211_IFTYPE_ADHOC &&
 275                             nsdata->vif.type == NL80211_IFTYPE_ADHOC)
 276                                 return -EBUSY;
 277                         /*
 278                          * will not add another interface while any channel
 279                          * switch is active.
 280                          */
 281                         if (nsdata->vif.csa_active)
 282                                 return -EBUSY;
 283
 284                         /*
 285                          * The remaining checks are only performed for interfaces
 286                          * with the same MAC address.
 287                          */
 288                         if (!ether_addr_equal(sdata->vif.addr,
 289                                               nsdata->vif.addr))
 290                                 continue;
 291
 292                         /*
 293                          * check whether it may have the same address
 294                          */
 295                         if (!identical_mac_addr_allowed(iftype,
 296                                                         nsdata->vif.type))
 297                                 return -ENOTUNIQ;
 298
 299                         /*
 300                          * can only add VLANs to enabled APs
 301                          */
 302                         if (iftype == NL80211_IFTYPE_AP_VLAN &&
 303                             nsdata->vif.type == NL80211_IFTYPE_AP)
 304                                 sdata->bss = &nsdata->u.ap;
 305                 }
 306         }
 307
 308         return 0;
 309 }
 310
 311 static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata,
 312                                   enum nl80211_iftype iftype)
 313 {
 314         int n_queues = sdata->local->hw.queues;
 315         int i;
 316
 317         if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
 318                 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
 319                         if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
 320                                          IEEE80211_INVAL_HW_QUEUE))
 321                                 return -EINVAL;
 322                         if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
 323                                          n_queues))
 324                                 return -EINVAL;
 325                 }
 326         }
 327
 328         if ((iftype != NL80211_IFTYPE_AP &&
 329              iftype != NL80211_IFTYPE_P2P_GO &&
 330              iftype != NL80211_IFTYPE_MESH_POINT) ||
 331             !(sdata->local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)) {
 332                 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
 333                 return 0;
 334         }
 335
 336         if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
 337                 return -EINVAL;
 338
 339         if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
 340                 return -EINVAL;
 341
 342         return 0;
 343 }
 344
 345 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
 346                                     const int offset)
 347 {
 348         struct ieee80211_local *local = sdata->local;
 349         u32 flags = sdata->u.mntr_flags;
 350
 351 #define ADJUST(_f, _s)  do {                                    \
 352         if (flags & MONITOR_FLAG_##_f)                          \
 353                 local->fif_##_s += offset;                      \
 354         } while (0)
 355
 356         ADJUST(FCSFAIL, fcsfail);
 357         ADJUST(PLCPFAIL, plcpfail);
 358         ADJUST(CONTROL, control);
 359         ADJUST(CONTROL, pspoll);
 360         ADJUST(OTHER_BSS, other_bss);
 361
 362 #undef ADJUST
 363 }
 364
 365 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
 366 {
 367         struct ieee80211_local *local = sdata->local;
 368         int i;
 369
 370         for (i = 0; i < IEEE80211_NUM_ACS; i++) {
 371                 if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)
 372                         sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
 373                 else if (local->hw.queues >= IEEE80211_NUM_ACS)
 374                         sdata->vif.hw_queue[i] = i;
 375                 else
 376                         sdata->vif.hw_queue[i] = 0;
 377         }
 378         sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
 379 }
 380
 381 int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
 382 {
 383         struct ieee80211_sub_if_data *sdata;
 384         int ret;
 385
 386         if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
 387                 return 0;
 388
 389         ASSERT_RTNL();
 390
 391         if (local->monitor_sdata)
 392                 return 0;
 393
 394         sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
 395         if (!sdata)
 396                 return -ENOMEM;
 397
 398         /* set up data */
 399         sdata->local = local;
 400         sdata->vif.type = NL80211_IFTYPE_MONITOR;
 401         snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
 402                  wiphy_name(local->hw.wiphy));
 403
 404         ieee80211_set_default_queues(sdata);
 405
 406         ret = drv_add_interface(local, sdata);
 407         if (WARN_ON(ret)) {
 408                 /* ok .. stupid driver, it asked for this! */
 409                 kfree(sdata);
 410                 return ret;
 411         }
 412
 413         ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
 414         if (ret) {
 415                 kfree(sdata);
 416                 return ret;
 417         }
 418
 419         ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
 420                                         IEEE80211_CHANCTX_EXCLUSIVE);
 421         if (ret) {
 422                 drv_remove_interface(local, sdata);
 423                 kfree(sdata);
 424                 return ret;
 425         }
 426
 427         mutex_lock(&local->iflist_mtx);
 428         rcu_assign_pointer(local->monitor_sdata, sdata);
 429         mutex_unlock(&local->iflist_mtx);
 430
 431         return 0;
 432 }
 433
 434 void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
 435 {
 436         struct ieee80211_sub_if_data *sdata;
 437
 438         if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
 439                 return;
 440
 441         ASSERT_RTNL();
 442
 443         mutex_lock(&local->iflist_mtx);
 444
 445         sdata = rcu_dereference_protected(local->monitor_sdata,
 446                                           lockdep_is_held(&local->iflist_mtx));
 447         if (!sdata) {
 448                 mutex_unlock(&local->iflist_mtx);
 449                 return;
 450         }
 451
 452         rcu_assign_pointer(local->monitor_sdata, NULL);
 453         mutex_unlock(&local->iflist_mtx);
 454
 455         synchronize_net();
 456
 457         ieee80211_vif_release_channel(sdata);
 458
 459         drv_remove_interface(local, sdata);
 460
 461         kfree(sdata);
 462 }
 463
 464 /*
 465  * NOTE: Be very careful when changing this function, it must NOT return
 466  * an error on interface type changes that have been pre-checked, so most
 467  * checks should be in ieee80211_check_concurrent_iface.
 468  */
 469 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
 470 {
 471         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
 472         struct net_device *dev = wdev->netdev;
 473         struct ieee80211_local *local = sdata->local;
 474         struct sta_info *sta;
 475         u32 changed = 0;
 476         int res;
 477         u32 hw_reconf_flags = 0;
 478
 479         switch (sdata->vif.type) {
 480         case NL80211_IFTYPE_WDS:
 481                 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
 482                         return -ENOLINK;
 483                 break;
 484         case NL80211_IFTYPE_AP_VLAN: {
 485                 struct ieee80211_sub_if_data *master;
 486
 487                 if (!sdata->bss)
 488                         return -ENOLINK;
 489
 490                 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
 491
 492                 master = container_of(sdata->bss,
 493                                       struct ieee80211_sub_if_data, u.ap);
 494                 sdata->control_port_protocol =
 495                         master->control_port_protocol;
 496                 sdata->control_port_no_encrypt =
 497                         master->control_port_no_encrypt;
 498                 sdata->vif.cab_queue = master->vif.cab_queue;
 499                 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
 500                        sizeof(sdata->vif.hw_queue));
 501                 break;
 502                 }
 503         case NL80211_IFTYPE_AP:
 504                 sdata->bss = &sdata->u.ap;
 505                 break;
 506         case NL80211_IFTYPE_MESH_POINT:
 507         case NL80211_IFTYPE_STATION:
 508         case NL80211_IFTYPE_MONITOR:
 509         case NL80211_IFTYPE_ADHOC:
 510         case NL80211_IFTYPE_P2P_DEVICE:
 511                 /* no special treatment */
 512                 break;
 513         case NL80211_IFTYPE_UNSPECIFIED:
 514         case NUM_NL80211_IFTYPES:
 515         case NL80211_IFTYPE_P2P_CLIENT:
 516         case NL80211_IFTYPE_P2P_GO:
 517                 /* cannot happen */
 518                 WARN_ON(1);
 519                 break;
 520         }
 521
 522         if (local->open_count == 0) {
 523                 res = drv_start(local);
 524                 if (res)
 525                         goto err_del_bss;
 526                 /* we're brought up, everything changes */
 527                 hw_reconf_flags = ~0;
 528                 ieee80211_led_radio(local, true);
 529                 ieee80211_mod_tpt_led_trig(local,
 530                                            IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
 531         }
 532
 533         /*
 534          * Copy the hopefully now-present MAC address to
 535          * this interface, if it has the special null one.
 536          */
 537         if (dev && is_zero_ether_addr(dev->dev_addr)) {
 538                 memcpy(dev->dev_addr,
 539                        local->hw.wiphy->perm_addr,
 540                        ETH_ALEN);
 541                 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
 542
 543                 if (!is_valid_ether_addr(dev->dev_addr)) {
 544                         res = -EADDRNOTAVAIL;
 545                         goto err_stop;
 546                 }
 547         }
 548
 549         switch (sdata->vif.type) {
 550         case NL80211_IFTYPE_AP_VLAN:
 551                 /* no need to tell driver, but set carrier and chanctx */
 552                 if (rtnl_dereference(sdata->bss->beacon)) {
 553                         ieee80211_vif_vlan_copy_chanctx(sdata);
 554                         netif_carrier_on(dev);
 555                 } else {
 556                         netif_carrier_off(dev);
 557                 }
 558                 break;
 559         case NL80211_IFTYPE_MONITOR:
 560                 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
 561                         local->cooked_mntrs++;
 562                         break;
 563                 }
 564
 565                 if (sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE) {
 566                         res = drv_add_interface(local, sdata);
 567                         if (res)
 568                                 goto err_stop;
 569                 } else if (local->monitors == 0 && local->open_count == 0) {
 570                         res = ieee80211_add_virtual_monitor(local);
 571                         if (res)
 572                                 goto err_stop;
 573                 }
 574
 575                 /* must be before the call to ieee80211_configure_filter */
 576                 local->monitors++;
 577                 if (local->monitors == 1) {
 578                         local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
 579                         hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
 580                 }
 581
 582                 ieee80211_adjust_monitor_flags(sdata, 1);
 583                 ieee80211_configure_filter(local);
 584                 mutex_lock(&local->mtx);
 585                 ieee80211_recalc_idle(local);
 586                 mutex_unlock(&local->mtx);
 587
 588                 netif_carrier_on(dev);
 589                 break;
 590         default:
 591                 if (coming_up) {
 592                         ieee80211_del_virtual_monitor(local);
 593
 594                         res = drv_add_interface(local, sdata);
 595                         if (res)
 596                                 goto err_stop;
 597                         res = ieee80211_check_queues(sdata,
 598                                 ieee80211_vif_type_p2p(&sdata->vif));
 599                         if (res)
 600                                 goto err_del_interface;
 601                 }
 602
 603                 if (sdata->vif.type == NL80211_IFTYPE_AP) {
 604                         local->fif_pspoll++;
 605                         local->fif_probe_req++;
 606
 607                         ieee80211_configure_filter(local);
 608                 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
 609                         local->fif_probe_req++;
 610                 }
 611
 612                 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
 613                         changed |= ieee80211_reset_erp_info(sdata);
 614                 ieee80211_bss_info_change_notify(sdata, changed);
 615
 616                 switch (sdata->vif.type) {
 617                 case NL80211_IFTYPE_STATION:
 618                 case NL80211_IFTYPE_ADHOC:
 619                 case NL80211_IFTYPE_AP:
 620                 case NL80211_IFTYPE_MESH_POINT:
 621                         netif_carrier_off(dev);
 622                         break;
 623                 case NL80211_IFTYPE_WDS:
 624                 case NL80211_IFTYPE_P2P_DEVICE:
 625                         break;
 626                 default:
 627                         /* not reached */
 628                         WARN_ON(1);
 629                 }
 630
 631                 /*
 632                  * set default queue parameters so drivers don't
 633                  * need to initialise the hardware if the hardware
 634                  * doesn't start up with sane defaults
 635                  */
 636                 ieee80211_set_wmm_default(sdata, true);
 637         }
 638
 639         set_bit(SDATA_STATE_RUNNING, &sdata->state);
 640
 641         if (sdata->vif.type == NL80211_IFTYPE_WDS) {
 642                 /* Create STA entry for the WDS peer */
 643                 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
 644                                      GFP_KERNEL);
 645                 if (!sta) {
 646                         res = -ENOMEM;
 647                         goto err_del_interface;
 648                 }
 649
 650                 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
 651                 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
 652                 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
 653
 654                 res = sta_info_insert(sta);
 655                 if (res) {
 656                         /* STA has been freed */
 657                         goto err_del_interface;
 658                 }
 659
 660                 rate_control_rate_init(sta);
 661                 netif_carrier_on(dev);
 662         } else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) {
 663                 rcu_assign_pointer(local->p2p_sdata, sdata);
 664         }
 665
 666         /*
 667          * set_multicast_list will be invoked by the networking core
 668          * which will check whether any increments here were done in
 669          * error and sync them down to the hardware as filter flags.
 670          */
 671         if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
 672                 atomic_inc(&local->iff_allmultis);
 673
 674         if (sdata->flags & IEEE80211_SDATA_PROMISC)
 675                 atomic_inc(&local->iff_promiscs);
 676
 677         if (coming_up)
 678                 local->open_count++;
 679
 680         if (hw_reconf_flags)
 681                 ieee80211_hw_config(local, hw_reconf_flags);
 682
 683         ieee80211_recalc_ps(local, -1);
 684
 685         if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
 686             sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
 687                 /* XXX: for AP_VLAN, actually track AP queues */
 688                 netif_tx_start_all_queues(dev);
 689         } else if (dev) {
 690                 unsigned long flags;
 691                 int n_acs = IEEE80211_NUM_ACS;
 692                 int ac;
 693
 694                 if (local->hw.queues < IEEE80211_NUM_ACS)
 695                         n_acs = 1;
 696
 697                 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 698                 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
 699                     (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
 700                      skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
 701                         for (ac = 0; ac < n_acs; ac++) {
 702                                 int ac_queue = sdata->vif.hw_queue[ac];
 703
 704                                 if (local->queue_stop_reasons[ac_queue] == 0 &&
 705                                     skb_queue_empty(&local->pending[ac_queue]))
 706                                         netif_start_subqueue(dev, ac);
 707                         }
 708                 }
 709                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 710         }
 711
 712         return 0;
 713  err_del_interface:
 714         drv_remove_interface(local, sdata);
 715  err_stop:
 716         if (!local->open_count)
 717                 drv_stop(local);
 718  err_del_bss:
 719         sdata->bss = NULL;
 720         if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
 721                 list_del(&sdata->u.vlan.list);
 722         /* might already be clear but that doesn't matter */
 723         clear_bit(SDATA_STATE_RUNNING, &sdata->state);
 724         return res;
 725 }
 726
 727 static int ieee80211_open(struct net_device *dev)
 728 {
 729         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 730         int err;
 731
 732         /* fail early if user set an invalid address */
 733         if (!is_valid_ether_addr(dev->dev_addr))
 734                 return -EADDRNOTAVAIL;
 735
 736         err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
 737         if (err)
 738                 return err;
 739
 740         return ieee80211_do_open(&sdata->wdev, true);
 741 }
 742
 743 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
 744                               bool going_down)
 745 {
 746         struct ieee80211_local *local = sdata->local;
 747         unsigned long flags;
 748         struct sk_buff *skb, *tmp;
 749         u32 hw_reconf_flags = 0;
 750         int i, flushed;
 751         struct ps_data *ps;
 752
 753         clear_bit(SDATA_STATE_RUNNING, &sdata->state);
 754
 755         if (rcu_access_pointer(local->scan_sdata) == sdata)
 756                 ieee80211_scan_cancel(local);
 757
 758         /*
 759          * Stop TX on this interface first.
 760          */
 761         if (sdata->dev)
 762                 netif_tx_stop_all_queues(sdata->dev);
 763
 764         ieee80211_roc_purge(local, sdata);
 765
 766         if (sdata->vif.type == NL80211_IFTYPE_STATION)
 767                 ieee80211_mgd_stop(sdata);
 768
 769         if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
 770                 ieee80211_ibss_stop(sdata);
 771
 772
 773         /*
 774          * Remove all stations associated with this interface.
 775          *
 776          * This must be done before calling ops->remove_interface()
 777          * because otherwise we can later invoke ops->sta_notify()
 778          * whenever the STAs are removed, and that invalidates driver
 779          * assumptions about always getting a vif pointer that is valid
 780          * (because if we remove a STA after ops->remove_interface()
 781          * the driver will have removed the vif info already!)
 782          *
 783          * This is relevant only in WDS mode, in all other modes we've
 784          * already removed all stations when disconnecting or similar,
 785          * so warn otherwise.
 786          *
 787          * We call sta_info_flush_cleanup() later, to combine RCU waits.
 788          */
 789         flushed = sta_info_flush_defer(sdata);
 790         WARN_ON_ONCE((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
 791                      (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1));
 792
 793         /* don't count this interface for promisc/allmulti while it is down */
 794         if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
 795                 atomic_dec(&local->iff_allmultis);
 796
 797         if (sdata->flags & IEEE80211_SDATA_PROMISC)
 798                 atomic_dec(&local->iff_promiscs);
 799
 800         if (sdata->vif.type == NL80211_IFTYPE_AP) {
 801                 local->fif_pspoll--;
 802                 local->fif_probe_req--;
 803         } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
 804                 local->fif_probe_req--;
 805         }
 806
 807         if (sdata->dev) {
 808                 netif_addr_lock_bh(sdata->dev);
 809                 spin_lock_bh(&local->filter_lock);
 810                 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
 811                                  sdata->dev->addr_len);
 812                 spin_unlock_bh(&local->filter_lock);
 813                 netif_addr_unlock_bh(sdata->dev);
 814         }
 815
 816         del_timer_sync(&local->dynamic_ps_timer);
 817         cancel_work_sync(&local->dynamic_ps_enable_work);
 818
 819         cancel_work_sync(&sdata->recalc_smps);
 820         sdata->vif.csa_active = false;
 821         cancel_work_sync(&sdata->csa_finalize_work);
 822
 823         cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
 824
 825         if (sdata->wdev.cac_started) {
 826                 WARN_ON(local->suspended);
 827                 mutex_lock(&local->iflist_mtx);
 828                 ieee80211_vif_release_channel(sdata);
 829                 mutex_unlock(&local->iflist_mtx);
 830                 cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_ABORTED,
 831                                    GFP_KERNEL);
 832         }
 833
 834         /* APs need special treatment */
 835         if (sdata->vif.type == NL80211_IFTYPE_AP) {
 836                 struct ieee80211_sub_if_data *vlan, *tmpsdata;
 837
 838                 /* down all dependent devices, that is VLANs */
 839                 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
 840                                          u.vlan.list)
 841                         dev_close(vlan->dev);
 842                 WARN_ON(!list_empty(&sdata->u.ap.vlans));
 843         } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
 844                 /* remove all packets in parent bc_buf pointing to this dev */
 845                 ps = &sdata->bss->ps;
 846
 847                 spin_lock_irqsave(&ps->bc_buf.lock, flags);
 848                 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
 849                         if (skb->dev == sdata->dev) {
 850                                 __skb_unlink(skb, &ps->bc_buf);
 851                                 local->total_ps_buffered--;
 852                                 ieee80211_free_txskb(&local->hw, skb);
 853                         }
 854                 }
 855                 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
 856         }
 857
 858         if (going_down)
 859                 local->open_count--;
 860
 861         switch (sdata->vif.type) {
 862         case NL80211_IFTYPE_AP_VLAN:
 863                 list_del(&sdata->u.vlan.list);
 864                 rcu_assign_pointer(sdata->vif.chanctx_conf, NULL);
 865                 /* no need to tell driver */
 866                 break;
 867         case NL80211_IFTYPE_MONITOR:
 868                 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
 869                         local->cooked_mntrs--;
 870                         break;
 871                 }
 872
 873                 local->monitors--;
 874                 if (local->monitors == 0) {
 875                         local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
 876                         hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
 877                 }
 878
 879                 ieee80211_adjust_monitor_flags(sdata, -1);
 880                 break;
 881         case NL80211_IFTYPE_P2P_DEVICE:
 882                 /* relies on synchronize_rcu() below */
 883                 rcu_assign_pointer(local->p2p_sdata, NULL);
 884                 /* fall through */
 885         default:
 886                 cancel_work_sync(&sdata->work);
 887                 /*
 888                  * When we get here, the interface is marked down.
 889                  *
 890                  * sta_info_flush_cleanup() requires rcu_barrier()
 891                  * first to wait for the station call_rcu() calls
 892                  * to complete, and we also need synchronize_rcu()
 893                  * to wait for the RX path in case it is using the
 894                  * interface and enqueuing frames at this very time on
 895                  * another CPU.
 896                  */
 897                 synchronize_rcu();
 898                 rcu_barrier();
 899                 sta_info_flush_cleanup(sdata);
 900
 901                 /*
 902                  * Free all remaining keys, there shouldn't be any,
 903                  * except maybe in WDS mode?
 904                  */
 905                 ieee80211_free_keys(sdata);
 906
 907                 /* fall through */
 908         case NL80211_IFTYPE_AP:
 909                 skb_queue_purge(&sdata->skb_queue);
 910         }
 911
 912         sdata->bss = NULL;
 913
 914         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 915         for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
 916                 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
 917                         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 918                         if (info->control.vif == &sdata->vif) {
 919                                 __skb_unlink(skb, &local->pending[i]);
 920                                 ieee80211_free_txskb(&local->hw, skb);
 921                         }
 922                 }
 923         }
 924         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 925
 926         if (local->open_count == 0)
 927                 ieee80211_clear_tx_pending(local);
 928
 929         /*
 930          * If the interface goes down while suspended, presumably because
 931          * the device was unplugged and that happens before our resume,
 932          * then the driver is already unconfigured and the remainder of
 933          * this function isn't needed.
 934          * XXX: what about WoWLAN? If the device has software state, e.g.
 935          *      memory allocated, it might expect teardown commands from
 936          *      mac80211 here?
 937          */
 938         if (local->suspended) {
 939                 WARN_ON(local->wowlan);
 940                 WARN_ON(rtnl_dereference(local->monitor_sdata));
 941                 return;
 942         }
 943
 944         switch (sdata->vif.type) {
 945         case NL80211_IFTYPE_AP_VLAN:
 946                 break;
 947         case NL80211_IFTYPE_MONITOR:
 948                 if (local->monitors == 0)
 949                         ieee80211_del_virtual_monitor(local);
 950
 951                 mutex_lock(&local->mtx);
 952                 ieee80211_recalc_idle(local);
 953                 mutex_unlock(&local->mtx);
 954
 955                 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
 956                         break;
 957
 958                 /* fall through */
 959         default:
 960                 if (going_down)
 961                         drv_remove_interface(local, sdata);
 962         }
 963
 964         ieee80211_recalc_ps(local, -1);
 965
 966         if (local->open_count == 0) {
 967                 ieee80211_stop_device(local);
 968
 969                 /* no reconfiguring after stop! */
 970                 return;
 971         }
 972
 973         /* do after stop to avoid reconfiguring when we stop anyway */
 974         ieee80211_configure_filter(local);
 975         ieee80211_hw_config(local, hw_reconf_flags);
 976
 977         if (local->monitors == local->open_count)
 978                 ieee80211_add_virtual_monitor(local);
 979 }
 980
 981 static int ieee80211_stop(struct net_device *dev)
 982 {
 983         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 984
 985         ieee80211_do_stop(sdata, true);
 986
 987         return 0;
 988 }
 989
 990 static void ieee80211_set_multicast_list(struct net_device *dev)
 991 {
 992         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 993         struct ieee80211_local *local = sdata->local;
 994         int allmulti, promisc, sdata_allmulti, sdata_promisc;
 995
 996         allmulti = !!(dev->flags & IFF_ALLMULTI);
 997         promisc = !!(dev->flags & IFF_PROMISC);
 998         sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
 999         sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
1000
1001         if (allmulti != sdata_allmulti) {
1002                 if (dev->flags & IFF_ALLMULTI)
1003                         atomic_inc(&local->iff_allmultis);
1004                 else
1005                         atomic_dec(&local->iff_allmultis);
1006                 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
1007         }
1008
1009         if (promisc != sdata_promisc) {
1010                 if (dev->flags & IFF_PROMISC)
1011                         atomic_inc(&local->iff_promiscs);
1012                 else
1013                         atomic_dec(&local->iff_promiscs);
1014                 sdata->flags ^= IEEE80211_SDATA_PROMISC;
1015         }
1016
1017         /*
1018          * TODO: If somebody needs this on AP interfaces,
1019          *       it can be enabled easily but multicast
1020          *       addresses from VLANs need to be synced.
1021          */
1022         if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1023             sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1024             sdata->vif.type != NL80211_IFTYPE_AP)
1025                 drv_set_multicast_list(local, sdata, &dev->mc);
1026
1027         spin_lock_bh(&local->filter_lock);
1028         __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
1029         spin_unlock_bh(&local->filter_lock);
1030         ieee80211_queue_work(&local->hw, &local->reconfig_filter);
1031 }
1032
1033 /*
1034  * Called when the netdev is removed or, by the code below, before
1035  * the interface type changes.
1036  */
1037 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
1038 {
1039         int flushed;
1040         int i;
1041
1042         /* free extra data */
1043         ieee80211_free_keys(sdata);
1044
1045         ieee80211_debugfs_remove_netdev(sdata);
1046
1047         for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1048                 __skb_queue_purge(&sdata->fragments[i].skb_list);
1049         sdata->fragment_next = 0;
1050
1051         if (ieee80211_vif_is_mesh(&sdata->vif))
1052                 mesh_rmc_free(sdata);
1053
1054         flushed = sta_info_flush(sdata);
1055         WARN_ON(flushed);
1056 }
1057
1058 static void ieee80211_uninit(struct net_device *dev)
1059 {
1060         ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
1061 }
1062
1063 static u16 ieee80211_netdev_select_queue(struct net_device *dev,
1064                                          struct sk_buff *skb)
1065 {
1066         return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
1067 }
1068
1069 static const struct net_device_ops ieee80211_dataif_ops = {
1070         .ndo_open               = ieee80211_open,
1071         .ndo_stop               = ieee80211_stop,
1072         .ndo_uninit             = ieee80211_uninit,
1073         .ndo_start_xmit         = ieee80211_subif_start_xmit,
1074         .ndo_set_rx_mode        = ieee80211_set_multicast_list,
1075         .ndo_change_mtu         = ieee80211_change_mtu,
1076         .ndo_set_mac_address    = ieee80211_change_mac,
1077         .ndo_select_queue       = ieee80211_netdev_select_queue,
1078 };
1079
1080 static u16 ieee80211_monitor_select_queue(struct net_device *dev,
1081                                           struct sk_buff *skb)
1082 {
1083         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1084         struct ieee80211_local *local = sdata->local;
1085         struct ieee80211_hdr *hdr;
1086         struct ieee80211_radiotap_header *rtap = (void *)skb->data;
1087
1088         if (local->hw.queues < IEEE80211_NUM_ACS)
1089                 return 0;
1090
1091         if (skb->len < 4 ||
1092             skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
1093                 return 0; /* doesn't matter, frame will be dropped */
1094
1095         hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
1096
1097         return ieee80211_select_queue_80211(sdata, skb, hdr);
1098 }
1099
1100 static const struct net_device_ops ieee80211_monitorif_ops = {
1101         .ndo_open               = ieee80211_open,
1102         .ndo_stop               = ieee80211_stop,
1103         .ndo_uninit             = ieee80211_uninit,
1104         .ndo_start_xmit         = ieee80211_monitor_start_xmit,
1105         .ndo_set_rx_mode        = ieee80211_set_multicast_list,
1106         .ndo_change_mtu         = ieee80211_change_mtu,
1107         .ndo_set_mac_address    = ieee80211_change_mac,
1108         .ndo_select_queue       = ieee80211_monitor_select_queue,
1109 };
1110
1111 static void ieee80211_if_setup(struct net_device *dev)
1112 {
1113         ether_setup(dev);
1114         dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1115         dev->netdev_ops = &ieee80211_dataif_ops;
1116         dev->destructor = free_netdev;
1117 }
1118
1119 static void ieee80211_iface_work(struct work_struct *work)
1120 {
1121         struct ieee80211_sub_if_data *sdata =
1122                 container_of(work, struct ieee80211_sub_if_data, work);
1123         struct ieee80211_local *local = sdata->local;
1124         struct sk_buff *skb;
1125         struct sta_info *sta;
1126         struct ieee80211_ra_tid *ra_tid;
1127
1128         if (!ieee80211_sdata_running(sdata))
1129                 return;
1130
1131         if (local->scanning)
1132                 return;
1133
1134         /*
1135          * ieee80211_queue_work() should have picked up most cases,
1136          * here we'll pick the rest.
1137          */
1138         if (WARN(local->suspended,
1139                  "interface work scheduled while going to suspend\n"))
1140                 return;
1141
1142         /* first process frames */
1143         while ((skb = skb_dequeue(&sdata->skb_queue))) {
1144                 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1145
1146                 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
1147                         ra_tid = (void *)&skb->cb;
1148                         ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
1149                                                  ra_tid->tid);
1150                 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
1151                         ra_tid = (void *)&skb->cb;
1152                         ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
1153                                                 ra_tid->tid);
1154                 } else if (ieee80211_is_action(mgmt->frame_control) &&
1155                            mgmt->u.action.category == WLAN_CATEGORY_BACK) {
1156                         int len = skb->len;
1157
1158                         mutex_lock(&local->sta_mtx);
1159                         sta = sta_info_get_bss(sdata, mgmt->sa);
1160                         if (sta) {
1161                                 switch (mgmt->u.action.u.addba_req.action_code) {
1162                                 case WLAN_ACTION_ADDBA_REQ:
1163                                         ieee80211_process_addba_request(
1164                                                         local, sta, mgmt, len);
1165                                         break;
1166                                 case WLAN_ACTION_ADDBA_RESP:
1167                                         ieee80211_process_addba_resp(local, sta,
1168                                                                      mgmt, len);
1169                                         break;
1170                                 case WLAN_ACTION_DELBA:
1171                                         ieee80211_process_delba(sdata, sta,
1172                                                                 mgmt, len);
1173                                         break;
1174                                 default:
1175                                         WARN_ON(1);
1176                                         break;
1177                                 }
1178                         }
1179                         mutex_unlock(&local->sta_mtx);
1180                 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1181                         struct ieee80211_hdr *hdr = (void *)mgmt;
1182                         /*
1183                          * So the frame isn't mgmt, but frame_control
1184                          * is at the right place anyway, of course, so
1185                          * the if statement is correct.
1186                          *
1187                          * Warn if we have other data frame types here,
1188                          * they must not get here.
1189                          */
1190                         WARN_ON(hdr->frame_control &
1191                                         cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1192                         WARN_ON(!(hdr->seq_ctrl &
1193                                         cpu_to_le16(IEEE80211_SCTL_FRAG)));
1194                         /*
1195                          * This was a fragment of a frame, received while
1196                          * a block-ack session was active. That cannot be
1197                          * right, so terminate the session.
1198                          */
1199                         mutex_lock(&local->sta_mtx);
1200                         sta = sta_info_get_bss(sdata, mgmt->sa);
1201                         if (sta) {
1202                                 u16 tid = *ieee80211_get_qos_ctl(hdr) &
1203                                                 IEEE80211_QOS_CTL_TID_MASK;
1204
1205                                 __ieee80211_stop_rx_ba_session(
1206                                         sta, tid, WLAN_BACK_RECIPIENT,
1207                                         WLAN_REASON_QSTA_REQUIRE_SETUP,
1208                                         true);
1209                         }
1210                         mutex_unlock(&local->sta_mtx);
1211                 } else switch (sdata->vif.type) {
1212                 case NL80211_IFTYPE_STATION:
1213                         ieee80211_sta_rx_queued_mgmt(sdata, skb);
1214                         break;
1215                 case NL80211_IFTYPE_ADHOC:
1216                         ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1217                         break;
1218                 case NL80211_IFTYPE_MESH_POINT:
1219                         if (!ieee80211_vif_is_mesh(&sdata->vif))
1220                                 break;
1221                         ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1222                         break;
1223                 default:
1224                         WARN(1, "frame for unexpected interface type");
1225                         break;
1226                 }
1227
1228                 kfree_skb(skb);
1229         }
1230
1231         /* then other type-dependent work */
1232         switch (sdata->vif.type) {
1233         case NL80211_IFTYPE_STATION:
1234                 ieee80211_sta_work(sdata);
1235                 break;
1236         case NL80211_IFTYPE_ADHOC:
1237                 ieee80211_ibss_work(sdata);
1238                 break;
1239         case NL80211_IFTYPE_MESH_POINT:
1240                 if (!ieee80211_vif_is_mesh(&sdata->vif))
1241                         break;
1242                 ieee80211_mesh_work(sdata);
1243                 break;
1244         default:
1245                 break;
1246         }
1247 }
1248
1249 static void ieee80211_recalc_smps_work(struct work_struct *work)
1250 {
1251         struct ieee80211_sub_if_data *sdata =
1252                 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1253
1254         ieee80211_recalc_smps(sdata);
1255 }
1256
1257 /*
1258  * Helper function to initialise an interface to a specific type.
1259  */
1260 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
1261                                   enum nl80211_iftype type)
1262 {
1263         /* clear type-dependent union */
1264         memset(&sdata->u, 0, sizeof(sdata->u));
1265
1266         /* and set some type-dependent values */
1267         sdata->vif.type = type;
1268         sdata->vif.p2p = false;
1269         sdata->wdev.iftype = type;
1270
1271         sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1272         sdata->control_port_no_encrypt = false;
1273
1274         sdata->noack_map = 0;
1275
1276         /* only monitor/p2p-device differ */
1277         if (sdata->dev) {
1278                 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1279                 sdata->dev->type = ARPHRD_ETHER;
1280         }
1281
1282         skb_queue_head_init(&sdata->skb_queue);
1283         INIT_WORK(&sdata->work, ieee80211_iface_work);
1284         INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
1285         INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
1286
1287         switch (type) {
1288         case NL80211_IFTYPE_P2P_GO:
1289                 type = NL80211_IFTYPE_AP;
1290                 sdata->vif.type = type;
1291                 sdata->vif.p2p = true;
1292                 /* fall through */
1293         case NL80211_IFTYPE_AP:
1294                 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
1295                 INIT_LIST_HEAD(&sdata->u.ap.vlans);
1296                 INIT_WORK(&sdata->u.ap.request_smps_work,
1297                           ieee80211_request_smps_ap_work);
1298                 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1299                 sdata->u.ap.req_smps = IEEE80211_SMPS_OFF;
1300                 break;
1301         case NL80211_IFTYPE_P2P_CLIENT:
1302                 type = NL80211_IFTYPE_STATION;
1303                 sdata->vif.type = type;
1304                 sdata->vif.p2p = true;
1305                 /* fall through */
1306         case NL80211_IFTYPE_STATION:
1307                 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
1308                 ieee80211_sta_setup_sdata(sdata);
1309                 break;
1310         case NL80211_IFTYPE_ADHOC:
1311                 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
1312                 ieee80211_ibss_setup_sdata(sdata);
1313                 break;
1314         case NL80211_IFTYPE_MESH_POINT:
1315                 if (ieee80211_vif_is_mesh(&sdata->vif))
1316                         ieee80211_mesh_init_sdata(sdata);
1317                 break;
1318         case NL80211_IFTYPE_MONITOR:
1319                 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
1320                 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
1321                 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
1322                                       MONITOR_FLAG_OTHER_BSS;
1323                 break;
1324         case NL80211_IFTYPE_WDS:
1325                 sdata->vif.bss_conf.bssid = NULL;
1326                 break;
1327         case NL80211_IFTYPE_AP_VLAN:
1328         case NL80211_IFTYPE_P2P_DEVICE:
1329                 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1330                 break;
1331         case NL80211_IFTYPE_UNSPECIFIED:
1332         case NUM_NL80211_IFTYPES:
1333                 BUG();
1334                 break;
1335         }
1336
1337         ieee80211_debugfs_add_netdev(sdata);
1338 }
1339
1340 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1341                                            enum nl80211_iftype type)
1342 {
1343         struct ieee80211_local *local = sdata->local;
1344         int ret, err;
1345         enum nl80211_iftype internal_type = type;
1346         bool p2p = false;
1347
1348         ASSERT_RTNL();
1349
1350         if (!local->ops->change_interface)
1351                 return -EBUSY;
1352
1353         switch (sdata->vif.type) {
1354         case NL80211_IFTYPE_AP:
1355         case NL80211_IFTYPE_STATION:
1356         case NL80211_IFTYPE_ADHOC:
1357                 /*
1358                  * Could maybe also all others here?
1359                  * Just not sure how that interacts
1360                  * with the RX/config path e.g. for
1361                  * mesh.
1362                  */
1363                 break;
1364         default:
1365                 return -EBUSY;
1366         }
1367
1368         switch (type) {
1369         case NL80211_IFTYPE_AP:
1370         case NL80211_IFTYPE_STATION:
1371         case NL80211_IFTYPE_ADHOC:
1372                 /*
1373                  * Could probably support everything
1374                  * but WDS here (WDS do_open can fail
1375                  * under memory pressure, which this
1376                  * code isn't prepared to handle).
1377                  */
1378                 break;
1379         case NL80211_IFTYPE_P2P_CLIENT:
1380                 p2p = true;
1381                 internal_type = NL80211_IFTYPE_STATION;
1382                 break;
1383         case NL80211_IFTYPE_P2P_GO:
1384                 p2p = true;
1385                 internal_type = NL80211_IFTYPE_AP;
1386                 break;
1387         default:
1388                 return -EBUSY;
1389         }
1390
1391         ret = ieee80211_check_concurrent_iface(sdata, internal_type);
1392         if (ret)
1393                 return ret;
1394
1395         ieee80211_do_stop(sdata, false);
1396
1397         ieee80211_teardown_sdata(sdata);
1398
1399         ret = drv_change_interface(local, sdata, internal_type, p2p);
1400         if (ret)
1401                 type = ieee80211_vif_type_p2p(&sdata->vif);
1402
1403         /*
1404          * Ignore return value here, there's not much we can do since
1405          * the driver changed the interface type internally already.
1406          * The warnings will hopefully make driver authors fix it :-)
1407          */
1408         ieee80211_check_queues(sdata, type);
1409
1410         ieee80211_setup_sdata(sdata, type);
1411
1412         err = ieee80211_do_open(&sdata->wdev, false);
1413         WARN(err, "type change: do_open returned %d", err);
1414
1415         return ret;
1416 }
1417
1418 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1419                              enum nl80211_iftype type)
1420 {
1421         int ret;
1422
1423         ASSERT_RTNL();
1424
1425         if (type == ieee80211_vif_type_p2p(&sdata->vif))
1426                 return 0;
1427
1428         if (ieee80211_sdata_running(sdata)) {
1429                 ret = ieee80211_runtime_change_iftype(sdata, type);
1430                 if (ret)
1431                         return ret;
1432         } else {
1433                 /* Purge and reset type-dependent state. */
1434                 ieee80211_teardown_sdata(sdata);
1435                 ieee80211_setup_sdata(sdata, type);
1436         }
1437
1438         /* reset some values that shouldn't be kept across type changes */
1439         sdata->drop_unencrypted = 0;
1440         if (type == NL80211_IFTYPE_STATION)
1441                 sdata->u.mgd.use_4addr = false;
1442
1443         return 0;
1444 }
1445
1446 static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
1447                                        u8 *perm_addr, enum nl80211_iftype type)
1448 {
1449         struct ieee80211_sub_if_data *sdata;
1450         u64 mask, start, addr, val, inc;
1451         u8 *m;
1452         u8 tmp_addr[ETH_ALEN];
1453         int i;
1454
1455         /* default ... something at least */
1456         memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1457
1458         if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1459             local->hw.wiphy->n_addresses <= 1)
1460                 return;
1461
1462         mutex_lock(&local->iflist_mtx);
1463
1464         switch (type) {
1465         case NL80211_IFTYPE_MONITOR:
1466                 /* doesn't matter */
1467                 break;
1468         case NL80211_IFTYPE_WDS:
1469         case NL80211_IFTYPE_AP_VLAN:
1470                 /* match up with an AP interface */
1471                 list_for_each_entry(sdata, &local->interfaces, list) {
1472                         if (sdata->vif.type != NL80211_IFTYPE_AP)
1473                                 continue;
1474                         memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1475                         break;
1476                 }
1477                 /* keep default if no AP interface present */
1478                 break;
1479         case NL80211_IFTYPE_P2P_CLIENT:
1480         case NL80211_IFTYPE_P2P_GO:
1481                 if (local->hw.flags & IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF) {
1482                         list_for_each_entry(sdata, &local->interfaces, list) {
1483                                 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1484                                         continue;
1485                                 if (!ieee80211_sdata_running(sdata))
1486                                         continue;
1487                                 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1488                                 goto out_unlock;
1489                         }
1490                 }
1491                 /* otherwise fall through */
1492         default:
1493                 /* assign a new address if possible -- try n_addresses first */
1494                 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1495                         bool used = false;
1496
1497                         list_for_each_entry(sdata, &local->interfaces, list) {
1498                                 if (memcmp(local->hw.wiphy->addresses[i].addr,
1499                                            sdata->vif.addr, ETH_ALEN) == 0) {
1500                                         used = true;
1501                                         break;
1502                                 }
1503                         }
1504
1505                         if (!used) {
1506                                 memcpy(perm_addr,
1507                                        local->hw.wiphy->addresses[i].addr,
1508                                        ETH_ALEN);
1509                                 break;
1510                         }
1511                 }
1512
1513                 /* try mask if available */
1514                 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1515                         break;
1516
1517                 m = local->hw.wiphy->addr_mask;
1518                 mask =  ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1519                         ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1520                         ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1521
1522                 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1523                         /* not a contiguous mask ... not handled now! */
1524                         pr_info("not contiguous\n");
1525                         break;
1526                 }
1527
1528                 /*
1529                  * Pick address of existing interface in case user changed
1530                  * MAC address manually, default to perm_addr.
1531                  */
1532                 m = local->hw.wiphy->perm_addr;
1533                 list_for_each_entry(sdata, &local->interfaces, list) {
1534                         if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1535                                 continue;
1536                         m = sdata->vif.addr;
1537                         break;
1538                 }
1539                 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1540                         ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1541                         ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1542
1543                 inc = 1ULL<<__ffs64(mask);
1544                 val = (start & mask);
1545                 addr = (start & ~mask) | (val & mask);
1546                 do {
1547                         bool used = false;
1548
1549                         tmp_addr[5] = addr >> 0*8;
1550                         tmp_addr[4] = addr >> 1*8;
1551                         tmp_addr[3] = addr >> 2*8;
1552                         tmp_addr[2] = addr >> 3*8;
1553                         tmp_addr[1] = addr >> 4*8;
1554                         tmp_addr[0] = addr >> 5*8;
1555
1556                         val += inc;
1557
1558                         list_for_each_entry(sdata, &local->interfaces, list) {
1559                                 if (memcmp(tmp_addr, sdata->vif.addr,
1560                                                         ETH_ALEN) == 0) {
1561                                         used = true;
1562                                         break;
1563                                 }
1564                         }
1565
1566                         if (!used) {
1567                                 memcpy(perm_addr, tmp_addr, ETH_ALEN);
1568                                 break;
1569                         }
1570                         addr = (start & ~mask) | (val & mask);
1571                 } while (addr != start);
1572
1573                 break;
1574         }
1575
1576  out_unlock:
1577         mutex_unlock(&local->iflist_mtx);
1578 }
1579
1580 static void ieee80211_cleanup_sdata_stas_wk(struct work_struct *wk)
1581 {
1582         struct ieee80211_sub_if_data *sdata;
1583
1584         sdata = container_of(wk, struct ieee80211_sub_if_data, cleanup_stations_wk);
1585
1586         ieee80211_cleanup_sdata_stas(sdata);
1587 }
1588
1589 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1590                      struct wireless_dev **new_wdev, enum nl80211_iftype type,
1591                      struct vif_params *params)
1592 {
1593         struct net_device *ndev = NULL;
1594         struct ieee80211_sub_if_data *sdata = NULL;
1595         int ret, i;
1596         int txqs = 1;
1597
1598         ASSERT_RTNL();
1599
1600         if (type == NL80211_IFTYPE_P2P_DEVICE) {
1601                 struct wireless_dev *wdev;
1602
1603                 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1604                                 GFP_KERNEL);
1605                 if (!sdata)
1606                         return -ENOMEM;
1607                 wdev = &sdata->wdev;
1608
1609                 sdata->dev = NULL;
1610                 strlcpy(sdata->name, name, IFNAMSIZ);
1611                 ieee80211_assign_perm_addr(local, wdev->address, type);
1612                 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1613         } else {
1614                 if (local->hw.queues >= IEEE80211_NUM_ACS)
1615                         txqs = IEEE80211_NUM_ACS;
1616
1617                 ndev = alloc_netdev_mqs(sizeof(*sdata) +
1618                                         local->hw.vif_data_size,
1619                                         name, ieee80211_if_setup, txqs, 1);
1620                 if (!ndev)
1621                         return -ENOMEM;
1622                 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1623
1624                 ndev->needed_headroom = local->tx_headroom +
1625                                         4*6 /* four MAC addresses */
1626                                         + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1627                                         + 6 /* mesh */
1628                                         + 8 /* rfc1042/bridge tunnel */
1629                                         - ETH_HLEN /* ethernet hard_header_len */
1630                                         + IEEE80211_ENCRYPT_HEADROOM;
1631                 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1632
1633                 ret = dev_alloc_name(ndev, ndev->name);
1634                 if (ret < 0) {
1635                         free_netdev(ndev);
1636                         return ret;
1637                 }
1638
1639                 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
1640                 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1641                 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1642
1643                 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1644                 sdata = netdev_priv(ndev);
1645                 ndev->ieee80211_ptr = &sdata->wdev;
1646                 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1647                 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1648
1649                 sdata->dev = ndev;
1650         }
1651
1652         /* initialise type-independent data */
1653         sdata->wdev.wiphy = local->hw.wiphy;
1654         sdata->local = local;
1655
1656         for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1657                 skb_queue_head_init(&sdata->fragments[i].skb_list);
1658
1659         INIT_LIST_HEAD(&sdata->key_list);
1660
1661         spin_lock_init(&sdata->cleanup_stations_lock);
1662         INIT_LIST_HEAD(&sdata->cleanup_stations);
1663         INIT_WORK(&sdata->cleanup_stations_wk, ieee80211_cleanup_sdata_stas_wk);
1664         INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1665                           ieee80211_dfs_cac_timer_work);
1666         INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1667                           ieee80211_delayed_tailroom_dec);
1668
1669         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1670                 struct ieee80211_supported_band *sband;
1671                 sband = local->hw.wiphy->bands[i];
1672                 sdata->rc_rateidx_mask[i] =
1673                         sband ? (1 << sband->n_bitrates) - 1 : 0;
1674                 if (sband)
1675                         memcpy(sdata->rc_rateidx_mcs_mask[i],
1676                                sband->ht_cap.mcs.rx_mask,
1677                                sizeof(sdata->rc_rateidx_mcs_mask[i]));
1678                 else
1679                         memset(sdata->rc_rateidx_mcs_mask[i], 0,
1680                                sizeof(sdata->rc_rateidx_mcs_mask[i]));
1681         }
1682
1683         ieee80211_set_default_queues(sdata);
1684
1685         sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1686         sdata->user_power_level = local->user_power_level;
1687
1688         /* setup type-dependent data */
1689         ieee80211_setup_sdata(sdata, type);
1690
1691         if (ndev) {
1692                 if (params) {
1693                         ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1694                         if (type == NL80211_IFTYPE_STATION)
1695                                 sdata->u.mgd.use_4addr = params->use_4addr;
1696                 }
1697
1698                 ndev->features |= local->hw.netdev_features;
1699
1700                 ret = register_netdevice(ndev);
1701                 if (ret) {
1702                         free_netdev(ndev);
1703                         return ret;
1704                 }
1705         }
1706
1707         mutex_lock(&local->iflist_mtx);
1708         list_add_tail_rcu(&sdata->list, &local->interfaces);
1709         mutex_unlock(&local->iflist_mtx);
1710
1711         if (new_wdev)
1712                 *new_wdev = &sdata->wdev;
1713
1714         return 0;
1715 }
1716
1717 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
1718 {
1719         ASSERT_RTNL();
1720
1721         mutex_lock(&sdata->local->iflist_mtx);
1722         list_del_rcu(&sdata->list);
1723         mutex_unlock(&sdata->local->iflist_mtx);
1724
1725         synchronize_rcu();
1726
1727         if (sdata->dev) {
1728                 unregister_netdevice(sdata->dev);
1729         } else {
1730                 cfg80211_unregister_wdev(&sdata->wdev);
1731                 kfree(sdata);
1732         }
1733 }
1734
1735 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1736 {
1737         if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1738                 return;
1739         ieee80211_do_stop(sdata, true);
1740         ieee80211_teardown_sdata(sdata);
1741 }
1742
1743 /*
1744  * Remove all interfaces, may only be called at hardware unregistration
1745  * time because it doesn't do RCU-safe list removals.
1746  */
1747 void ieee80211_remove_interfaces(struct ieee80211_local *local)
1748 {
1749         struct ieee80211_sub_if_data *sdata, *tmp;
1750         LIST_HEAD(unreg_list);
1751         LIST_HEAD(wdev_list);
1752
1753         ASSERT_RTNL();
1754
1755         /*
1756          * Close all AP_VLAN interfaces first, as otherwise they
1757          * might be closed while the AP interface they belong to
1758          * is closed, causing unregister_netdevice_many() to crash.
1759          */
1760         list_for_each_entry(sdata, &local->interfaces, list)
1761                 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1762                         dev_close(sdata->dev);
1763
1764         mutex_lock(&local->iflist_mtx);
1765         list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1766                 list_del(&sdata->list);
1767
1768                 if (sdata->dev)
1769                         unregister_netdevice_queue(sdata->dev, &unreg_list);
1770                 else
1771                         list_add(&sdata->list, &wdev_list);
1772         }
1773         mutex_unlock(&local->iflist_mtx);
1774         unregister_netdevice_many(&unreg_list);
1775         list_del(&unreg_list);
1776
1777         list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1778                 list_del(&sdata->list);
1779                 cfg80211_unregister_wdev(&sdata->wdev);
1780                 kfree(sdata);
1781         }
1782 }
1783
1784 static int netdev_notify(struct notifier_block *nb,
1785                          unsigned long state, void *ptr)
1786 {
1787         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1788         struct ieee80211_sub_if_data *sdata;
1789
1790         if (state != NETDEV_CHANGENAME)
1791                 return 0;
1792
1793         if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
1794                 return 0;
1795
1796         if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
1797                 return 0;
1798
1799         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1800
1801         memcpy(sdata->name, dev->name, IFNAMSIZ);
1802
1803         ieee80211_debugfs_rename_netdev(sdata);
1804         return 0;
1805 }
1806
1807 static struct notifier_block mac80211_netdev_notifier = {
1808         .notifier_call = netdev_notify,
1809 };
1810
1811 int ieee80211_iface_init(void)
1812 {
1813         return register_netdevice_notifier(&mac80211_netdev_notifier);
1814 }
1815
1816 void ieee80211_iface_exit(void)
1817 {
1818         unregister_netdevice_notifier(&mac80211_netdev_notifier);
1819 }