net/mac80211/main.c

   1 /*
   2  * Copyright 2002-2005, Instant802 Networks, Inc.
   3  * Copyright 2005-2006, Devicescape Software, Inc.
   4  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 #include <net/mac80211.h>
  12 #include <linux/module.h>
  13 #include <linux/init.h>
  14 #include <linux/netdevice.h>
  15 #include <linux/types.h>
  16 #include <linux/slab.h>
  17 #include <linux/skbuff.h>
  18 #include <linux/etherdevice.h>
  19 #include <linux/if_arp.h>
  20 #include <linux/rtnetlink.h>
  21 #include <linux/bitmap.h>
  22 #include <linux/pm_qos.h>
  23 #include <linux/inetdevice.h>
  24 #include <net/net_namespace.h>
  25 #include <net/cfg80211.h>
  26 #include <net/addrconf.h>
  27
  28 #include "ieee80211_i.h"
  29 #include "driver-ops.h"
  30 #include "rate.h"
  31 #include "mesh.h"
  32 #include "wep.h"
  33 #include "led.h"
  34 #include "cfg.h"
  35 #include "debugfs.h"
  36
  37 void ieee80211_configure_filter(struct ieee80211_local *local)
  38 {
  39         u64 mc;
  40         unsigned int changed_flags;
  41         unsigned int new_flags = 0;
  42
  43         if (atomic_read(&local->iff_promiscs))
  44                 new_flags |= FIF_PROMISC_IN_BSS;
  45
  46         if (atomic_read(&local->iff_allmultis))
  47                 new_flags |= FIF_ALLMULTI;
  48
  49         if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) ||
  50             test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning))
  51                 new_flags |= FIF_BCN_PRBRESP_PROMISC;
  52
  53         if (local->fif_probe_req || local->probe_req_reg)
  54                 new_flags |= FIF_PROBE_REQ;
  55
  56         if (local->fif_fcsfail)
  57                 new_flags |= FIF_FCSFAIL;
  58
  59         if (local->fif_plcpfail)
  60                 new_flags |= FIF_PLCPFAIL;
  61
  62         if (local->fif_control)
  63                 new_flags |= FIF_CONTROL;
  64
  65         if (local->fif_other_bss)
  66                 new_flags |= FIF_OTHER_BSS;
  67
  68         if (local->fif_pspoll)
  69                 new_flags |= FIF_PSPOLL;
  70
  71         spin_lock_bh(&local->filter_lock);
  72         changed_flags = local->filter_flags ^ new_flags;
  73
  74         mc = drv_prepare_multicast(local, &local->mc_list);
  75         spin_unlock_bh(&local->filter_lock);
  76
  77         /* be a bit nasty */
  78         new_flags |= (1<<31);
  79
  80         drv_configure_filter(local, changed_flags, &new_flags, mc);
  81
  82         WARN_ON(new_flags & (1<<31));
  83
  84         local->filter_flags = new_flags & ~(1<<31);
  85 }
  86
  87 static void ieee80211_reconfig_filter(struct work_struct *work)
  88 {
  89         struct ieee80211_local *local =
  90                 container_of(work, struct ieee80211_local, reconfig_filter);
  91
  92         ieee80211_configure_filter(local);
  93 }
  94
  95 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
  96 {
  97         struct ieee80211_sub_if_data *sdata;
  98         struct ieee80211_channel *chan;
  99         u32 changed = 0;
 100         int power;
 101         enum nl80211_channel_type channel_type;
 102         u32 offchannel_flag;
 103         bool scanning = false;
 104
 105         offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
 106         if (local->scan_channel) {
 107                 chan = local->scan_channel;
 108                 /* If scanning on oper channel, use whatever channel-type
 109                  * is currently in use.
 110                  */
 111                 if (chan == local->_oper_channel)
 112                         channel_type = local->_oper_channel_type;
 113                 else
 114                         channel_type = NL80211_CHAN_NO_HT;
 115         } else if (local->tmp_channel) {
 116                 chan = local->tmp_channel;
 117                 channel_type = NL80211_CHAN_NO_HT;
 118         } else {
 119                 chan = local->_oper_channel;
 120                 channel_type = local->_oper_channel_type;
 121         }
 122
 123         if (chan != local->_oper_channel ||
 124             channel_type != local->_oper_channel_type)
 125                 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
 126         else
 127                 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
 128
 129         offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
 130
 131         if (offchannel_flag || chan != local->hw.conf.channel ||
 132             channel_type != local->hw.conf.channel_type) {
 133                 local->hw.conf.channel = chan;
 134                 local->hw.conf.channel_type = channel_type;
 135                 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
 136         }
 137
 138         if (!conf_is_ht(&local->hw.conf)) {
 139                 /*
 140                  * mac80211.h documents that this is only valid
 141                  * when the channel is set to an HT type, and
 142                  * that otherwise STATIC is used.
 143                  */
 144                 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
 145         } else if (local->hw.conf.smps_mode != local->smps_mode) {
 146                 local->hw.conf.smps_mode = local->smps_mode;
 147                 changed |= IEEE80211_CONF_CHANGE_SMPS;
 148         }
 149
 150         scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
 151                    test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning) ||
 152                    test_bit(SCAN_HW_SCANNING, &local->scanning);
 153         power = chan->max_power;
 154
 155         rcu_read_lock();
 156         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 157                 if (!rcu_access_pointer(sdata->vif.chanctx_conf))
 158                         continue;
 159                 power = min(power, sdata->vif.bss_conf.txpower);
 160         }
 161         rcu_read_unlock();
 162
 163         if (local->hw.conf.power_level != power) {
 164                 changed |= IEEE80211_CONF_CHANGE_POWER;
 165                 local->hw.conf.power_level = power;
 166         }
 167
 168         return changed;
 169 }
 170
 171 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
 172 {
 173         int ret = 0;
 174
 175         might_sleep();
 176
 177         if (!local->use_chanctx)
 178                 changed |= ieee80211_hw_conf_chan(local);
 179         else
 180                 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
 181                              IEEE80211_CONF_CHANGE_POWER);
 182
 183         if (changed && local->open_count) {
 184                 ret = drv_config(local, changed);
 185                 /*
 186                  * Goal:
 187                  * HW reconfiguration should never fail, the driver has told
 188                  * us what it can support so it should live up to that promise.
 189                  *
 190                  * Current status:
 191                  * rfkill is not integrated with mac80211 and a
 192                  * configuration command can thus fail if hardware rfkill
 193                  * is enabled
 194                  *
 195                  * FIXME: integrate rfkill with mac80211 and then add this
 196                  * WARN_ON() back
 197                  *
 198                  */
 199                 /* WARN_ON(ret); */
 200         }
 201
 202         return ret;
 203 }
 204
 205 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
 206                                       u32 changed)
 207 {
 208         struct ieee80211_local *local = sdata->local;
 209
 210         if (!changed)
 211                 return;
 212
 213         drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
 214 }
 215
 216 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
 217 {
 218         sdata->vif.bss_conf.use_cts_prot = false;
 219         sdata->vif.bss_conf.use_short_preamble = false;
 220         sdata->vif.bss_conf.use_short_slot = false;
 221         return BSS_CHANGED_ERP_CTS_PROT |
 222                BSS_CHANGED_ERP_PREAMBLE |
 223                BSS_CHANGED_ERP_SLOT;
 224 }
 225
 226 static void ieee80211_tasklet_handler(unsigned long data)
 227 {
 228         struct ieee80211_local *local = (struct ieee80211_local *) data;
 229         struct sta_info *sta, *tmp;
 230         struct skb_eosp_msg_data *eosp_data;
 231         struct sk_buff *skb;
 232
 233         while ((skb = skb_dequeue(&local->skb_queue)) ||
 234                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
 235                 switch (skb->pkt_type) {
 236                 case IEEE80211_RX_MSG:
 237                         /* Clear skb->pkt_type in order to not confuse kernel
 238                          * netstack. */
 239                         skb->pkt_type = 0;
 240                         ieee80211_rx(&local->hw, skb);
 241                         break;
 242                 case IEEE80211_TX_STATUS_MSG:
 243                         skb->pkt_type = 0;
 244                         ieee80211_tx_status(&local->hw, skb);
 245                         break;
 246                 case IEEE80211_EOSP_MSG:
 247                         eosp_data = (void *)skb->cb;
 248                         for_each_sta_info(local, eosp_data->sta, sta, tmp) {
 249                                 /* skip wrong virtual interface */
 250                                 if (memcmp(eosp_data->iface,
 251                                            sta->sdata->vif.addr, ETH_ALEN))
 252                                         continue;
 253                                 clear_sta_flag(sta, WLAN_STA_SP);
 254                                 break;
 255                         }
 256                         dev_kfree_skb(skb);
 257                         break;
 258                 default:
 259                         WARN(1, "mac80211: Packet is of unknown type %d\n",
 260                              skb->pkt_type);
 261                         dev_kfree_skb(skb);
 262                         break;
 263                 }
 264         }
 265 }
 266
 267 static void ieee80211_restart_work(struct work_struct *work)
 268 {
 269         struct ieee80211_local *local =
 270                 container_of(work, struct ieee80211_local, restart_work);
 271
 272         /* wait for scan work complete */
 273         flush_workqueue(local->workqueue);
 274
 275         mutex_lock(&local->mtx);
 276         WARN(test_bit(SCAN_HW_SCANNING, &local->scanning) ||
 277              rcu_dereference_protected(local->sched_scan_sdata,
 278                                        lockdep_is_held(&local->mtx)),
 279                 "%s called with hardware scan in progress\n", __func__);
 280         mutex_unlock(&local->mtx);
 281
 282         rtnl_lock();
 283         ieee80211_scan_cancel(local);
 284         ieee80211_reconfig(local);
 285         rtnl_unlock();
 286 }
 287
 288 void ieee80211_restart_hw(struct ieee80211_hw *hw)
 289 {
 290         struct ieee80211_local *local = hw_to_local(hw);
 291
 292         trace_api_restart_hw(local);
 293
 294         wiphy_info(hw->wiphy,
 295                    "Hardware restart was requested\n");
 296
 297         /* use this reason, ieee80211_reconfig will unblock it */
 298         ieee80211_stop_queues_by_reason(hw,
 299                 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
 300
 301         /*
 302          * Stop all Rx during the reconfig. We don't want state changes
 303          * or driver callbacks while this is in progress.
 304          */
 305         local->in_reconfig = true;
 306         barrier();
 307
 308         schedule_work(&local->restart_work);
 309 }
 310 EXPORT_SYMBOL(ieee80211_restart_hw);
 311
 312 #ifdef CONFIG_INET
 313 static int ieee80211_ifa_changed(struct notifier_block *nb,
 314                                  unsigned long data, void *arg)
 315 {
 316         struct in_ifaddr *ifa = arg;
 317         struct ieee80211_local *local =
 318                 container_of(nb, struct ieee80211_local,
 319                              ifa_notifier);
 320         struct net_device *ndev = ifa->ifa_dev->dev;
 321         struct wireless_dev *wdev = ndev->ieee80211_ptr;
 322         struct in_device *idev;
 323         struct ieee80211_sub_if_data *sdata;
 324         struct ieee80211_bss_conf *bss_conf;
 325         struct ieee80211_if_managed *ifmgd;
 326         int c = 0;
 327
 328         /* Make sure it's our interface that got changed */
 329         if (!wdev)
 330                 return NOTIFY_DONE;
 331
 332         if (wdev->wiphy != local->hw.wiphy)
 333                 return NOTIFY_DONE;
 334
 335         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
 336         bss_conf = &sdata->vif.bss_conf;
 337
 338         /* ARP filtering is only supported in managed mode */
 339         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 340                 return NOTIFY_DONE;
 341
 342         idev = __in_dev_get_rtnl(sdata->dev);
 343         if (!idev)
 344                 return NOTIFY_DONE;
 345
 346         ifmgd = &sdata->u.mgd;
 347         mutex_lock(&ifmgd->mtx);
 348
 349         /* Copy the addresses to the bss_conf list */
 350         ifa = idev->ifa_list;
 351         while (ifa) {
 352                 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
 353                         bss_conf->arp_addr_list[c] = ifa->ifa_address;
 354                 ifa = ifa->ifa_next;
 355                 c++;
 356         }
 357
 358         bss_conf->arp_addr_cnt = c;
 359
 360         /* Configure driver only if associated (which also implies it is up) */
 361         if (ifmgd->associated)
 362                 ieee80211_bss_info_change_notify(sdata,
 363                                                  BSS_CHANGED_ARP_FILTER);
 364
 365         mutex_unlock(&ifmgd->mtx);
 366
 367         return NOTIFY_DONE;
 368 }
 369 #endif
 370
 371 #if IS_ENABLED(CONFIG_IPV6)
 372 static int ieee80211_ifa6_changed(struct notifier_block *nb,
 373                                   unsigned long data, void *arg)
 374 {
 375         struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
 376         struct inet6_dev *idev = ifa->idev;
 377         struct net_device *ndev = ifa->idev->dev;
 378         struct ieee80211_local *local =
 379                 container_of(nb, struct ieee80211_local, ifa6_notifier);
 380         struct wireless_dev *wdev = ndev->ieee80211_ptr;
 381         struct ieee80211_sub_if_data *sdata;
 382
 383         /* Make sure it's our interface that got changed */
 384         if (!wdev || wdev->wiphy != local->hw.wiphy)
 385                 return NOTIFY_DONE;
 386
 387         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
 388
 389         /*
 390          * For now only support station mode. This is mostly because
 391          * doing AP would have to handle AP_VLAN in some way ...
 392          */
 393         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 394                 return NOTIFY_DONE;
 395
 396         drv_ipv6_addr_change(local, sdata, idev);
 397
 398         return NOTIFY_DONE;
 399 }
 400 #endif
 401
 402 /* There isn't a lot of sense in it, but you can transmit anything you like */
 403 static const struct ieee80211_txrx_stypes
 404 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
 405         [NL80211_IFTYPE_ADHOC] = {
 406                 .tx = 0xffff,
 407                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 408                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 409                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 410                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 411         },
 412         [NL80211_IFTYPE_STATION] = {
 413                 .tx = 0xffff,
 414                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 415                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 416         },
 417         [NL80211_IFTYPE_AP] = {
 418                 .tx = 0xffff,
 419                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 420                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 421                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 422                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 423                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 424                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 425                         BIT(IEEE80211_STYPE_ACTION >> 4),
 426         },
 427         [NL80211_IFTYPE_AP_VLAN] = {
 428                 /* copy AP */
 429                 .tx = 0xffff,
 430                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 431                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 432                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 433                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 434                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 435                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 436                         BIT(IEEE80211_STYPE_ACTION >> 4),
 437         },
 438         [NL80211_IFTYPE_P2P_CLIENT] = {
 439                 .tx = 0xffff,
 440                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 441                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 442         },
 443         [NL80211_IFTYPE_P2P_GO] = {
 444                 .tx = 0xffff,
 445                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 446                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 447                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 448                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 449                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 450                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 451                         BIT(IEEE80211_STYPE_ACTION >> 4),
 452         },
 453         [NL80211_IFTYPE_MESH_POINT] = {
 454                 .tx = 0xffff,
 455                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 456                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 457                         BIT(IEEE80211_STYPE_DEAUTH >> 4),
 458         },
 459         [NL80211_IFTYPE_P2P_DEVICE] = {
 460                 .tx = 0xffff,
 461                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 462                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 463         },
 464 };
 465
 466 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
 467         .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
 468                              IEEE80211_HT_AMPDU_PARM_DENSITY,
 469
 470         .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
 471                                 IEEE80211_HT_CAP_MAX_AMSDU |
 472                                 IEEE80211_HT_CAP_SGI_20 |
 473                                 IEEE80211_HT_CAP_SGI_40),
 474         .mcs = {
 475                 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
 476                              0xff, 0xff, 0xff, 0xff, 0xff, },
 477         },
 478 };
 479
 480 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
 481         .vht_cap_info =
 482                 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
 483                             IEEE80211_VHT_CAP_SHORT_GI_80 |
 484                             IEEE80211_VHT_CAP_SHORT_GI_160 |
 485                             IEEE80211_VHT_CAP_RXSTBC_1 |
 486                             IEEE80211_VHT_CAP_RXSTBC_2 |
 487                             IEEE80211_VHT_CAP_RXSTBC_3 |
 488                             IEEE80211_VHT_CAP_RXSTBC_4 |
 489                             IEEE80211_VHT_CAP_TXSTBC |
 490                             IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
 491                             IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
 492                             IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
 493                             IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
 494                             IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
 495         .supp_mcs = {
 496                 .rx_mcs_map = cpu_to_le16(~0),
 497                 .tx_mcs_map = cpu_to_le16(~0),
 498         },
 499 };
 500
 501 static const u8 extended_capabilities[] = {
 502         0, 0, 0, 0, 0, 0, 0,
 503         WLAN_EXT_CAPA8_OPMODE_NOTIF,
 504 };
 505
 506 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
 507                                         const struct ieee80211_ops *ops)
 508 {
 509         struct ieee80211_local *local;
 510         int priv_size, i;
 511         struct wiphy *wiphy;
 512         bool use_chanctx;
 513
 514         if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
 515                     !ops->add_interface || !ops->remove_interface ||
 516                     !ops->configure_filter))
 517                 return NULL;
 518
 519         if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
 520                 return NULL;
 521
 522         /* check all or no channel context operations exist */
 523         i = !!ops->add_chanctx + !!ops->remove_chanctx +
 524             !!ops->change_chanctx + !!ops->assign_vif_chanctx +
 525             !!ops->unassign_vif_chanctx;
 526         if (WARN_ON(i != 0 && i != 5))
 527                 return NULL;
 528         use_chanctx = i == 5;
 529
 530         /* Ensure 32-byte alignment of our private data and hw private data.
 531          * We use the wiphy priv data for both our ieee80211_local and for
 532          * the driver's private data
 533          *
 534          * In memory it'll be like this:
 535          *
 536          * +-------------------------+
 537          * | struct wiphy           |
 538          * +-------------------------+
 539          * | struct ieee80211_local  |
 540          * +-------------------------+
 541          * | driver's private data   |
 542          * +-------------------------+
 543          *
 544          */
 545         priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
 546
 547         wiphy = wiphy_new(&mac80211_config_ops, priv_size);
 548
 549         if (!wiphy)
 550                 return NULL;
 551
 552         wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
 553
 554         wiphy->privid = mac80211_wiphy_privid;
 555
 556         wiphy->flags |= WIPHY_FLAG_NETNS_OK |
 557                         WIPHY_FLAG_4ADDR_AP |
 558                         WIPHY_FLAG_4ADDR_STATION |
 559                         WIPHY_FLAG_REPORTS_OBSS |
 560                         WIPHY_FLAG_OFFCHAN_TX;
 561
 562         wiphy->extended_capabilities = extended_capabilities;
 563         wiphy->extended_capabilities_mask = extended_capabilities;
 564         wiphy->extended_capabilities_len = ARRAY_SIZE(extended_capabilities);
 565
 566         if (ops->remain_on_channel)
 567                 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
 568
 569         wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
 570                            NL80211_FEATURE_SAE |
 571                            NL80211_FEATURE_HT_IBSS |
 572                            NL80211_FEATURE_VIF_TXPOWER |
 573                            NL80211_FEATURE_USERSPACE_MPM;
 574
 575         if (!ops->hw_scan)
 576                 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
 577                                    NL80211_FEATURE_AP_SCAN;
 578
 579
 580         if (!ops->set_key)
 581                 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 582
 583         wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
 584
 585         local = wiphy_priv(wiphy);
 586
 587         local->hw.wiphy = wiphy;
 588
 589         local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
 590
 591         local->ops = ops;
 592         local->use_chanctx = use_chanctx;
 593
 594         /* set up some defaults */
 595         local->hw.queues = 1;
 596         local->hw.max_rates = 1;
 597         local->hw.max_report_rates = 0;
 598         local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
 599         local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
 600         local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
 601         local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
 602         local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
 603         local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
 604                                          IEEE80211_RADIOTAP_MCS_HAVE_GI |
 605                                          IEEE80211_RADIOTAP_MCS_HAVE_BW;
 606         local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
 607                                          IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
 608         local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
 609         wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
 610         wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
 611
 612         INIT_LIST_HEAD(&local->interfaces);
 613
 614         __hw_addr_init(&local->mc_list);
 615
 616         mutex_init(&local->iflist_mtx);
 617         mutex_init(&local->mtx);
 618
 619         mutex_init(&local->key_mtx);
 620         spin_lock_init(&local->filter_lock);
 621         spin_lock_init(&local->rx_path_lock);
 622         spin_lock_init(&local->queue_stop_reason_lock);
 623
 624         INIT_LIST_HEAD(&local->chanctx_list);
 625         mutex_init(&local->chanctx_mtx);
 626
 627         INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
 628
 629         INIT_WORK(&local->restart_work, ieee80211_restart_work);
 630
 631         INIT_WORK(&local->radar_detected_work,
 632                   ieee80211_dfs_radar_detected_work);
 633
 634         INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
 635         local->smps_mode = IEEE80211_SMPS_OFF;
 636
 637         INIT_WORK(&local->dynamic_ps_enable_work,
 638                   ieee80211_dynamic_ps_enable_work);
 639         INIT_WORK(&local->dynamic_ps_disable_work,
 640                   ieee80211_dynamic_ps_disable_work);
 641         setup_timer(&local->dynamic_ps_timer,
 642                     ieee80211_dynamic_ps_timer, (unsigned long) local);
 643
 644         INIT_WORK(&local->sched_scan_stopped_work,
 645                   ieee80211_sched_scan_stopped_work);
 646
 647         spin_lock_init(&local->ack_status_lock);
 648         idr_init(&local->ack_status_frames);
 649
 650         sta_info_init(local);
 651
 652         for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
 653                 skb_queue_head_init(&local->pending[i]);
 654                 atomic_set(&local->agg_queue_stop[i], 0);
 655         }
 656         tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
 657                      (unsigned long)local);
 658
 659         tasklet_init(&local->tasklet,
 660                      ieee80211_tasklet_handler,
 661                      (unsigned long) local);
 662
 663         skb_queue_head_init(&local->skb_queue);
 664         skb_queue_head_init(&local->skb_queue_unreliable);
 665
 666         ieee80211_led_names(local);
 667
 668         ieee80211_roc_setup(local);
 669
 670         return &local->hw;
 671 }
 672 EXPORT_SYMBOL(ieee80211_alloc_hw);
 673
 674 int ieee80211_register_hw(struct ieee80211_hw *hw)
 675 {
 676         struct ieee80211_local *local = hw_to_local(hw);
 677         int result, i;
 678         enum ieee80211_band band;
 679         int channels, max_bitrates;
 680         bool supp_ht, supp_vht;
 681         netdev_features_t feature_whitelist;
 682         static const u32 cipher_suites[] = {
 683                 /* keep WEP first, it may be removed below */
 684                 WLAN_CIPHER_SUITE_WEP40,
 685                 WLAN_CIPHER_SUITE_WEP104,
 686                 WLAN_CIPHER_SUITE_TKIP,
 687                 WLAN_CIPHER_SUITE_CCMP,
 688
 689                 /* keep last -- depends on hw flags! */
 690                 WLAN_CIPHER_SUITE_AES_CMAC
 691         };
 692
 693         if (hw->flags & IEEE80211_HW_QUEUE_CONTROL &&
 694             (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
 695              local->hw.offchannel_tx_hw_queue >= local->hw.queues))
 696                 return -EINVAL;
 697
 698 #ifdef CONFIG_PM
 699         if ((hw->wiphy->wowlan.flags || hw->wiphy->wowlan.n_patterns) &&
 700             (!local->ops->suspend || !local->ops->resume))
 701                 return -EINVAL;
 702 #endif
 703
 704         if (!local->use_chanctx) {
 705                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
 706                         const struct ieee80211_iface_combination *comb;
 707
 708                         comb = &local->hw.wiphy->iface_combinations[i];
 709
 710                         if (comb->num_different_channels > 1)
 711                                 return -EINVAL;
 712                 }
 713         } else {
 714                 /*
 715                  * WDS is currently prohibited when channel contexts are used
 716                  * because there's no clear definition of which channel WDS
 717                  * type interfaces use
 718                  */
 719                 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
 720                         return -EINVAL;
 721
 722                 /* DFS currently not supported with channel context drivers */
 723                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
 724                         const struct ieee80211_iface_combination *comb;
 725
 726                         comb = &local->hw.wiphy->iface_combinations[i];
 727
 728                         if (comb->radar_detect_widths)
 729                                 return -EINVAL;
 730                 }
 731         }
 732
 733         /* Only HW csum features are currently compatible with mac80211 */
 734         feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
 735                             NETIF_F_HW_CSUM;
 736         if (WARN_ON(hw->netdev_features & ~feature_whitelist))
 737                 return -EINVAL;
 738
 739         if (hw->max_report_rates == 0)
 740                 hw->max_report_rates = hw->max_rates;
 741
 742         local->rx_chains = 1;
 743
 744         /*
 745          * generic code guarantees at least one band,
 746          * set this very early because much code assumes
 747          * that hw.conf.channel is assigned
 748          */
 749         channels = 0;
 750         max_bitrates = 0;
 751         supp_ht = false;
 752         supp_vht = false;
 753         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 754                 struct ieee80211_supported_band *sband;
 755
 756                 sband = local->hw.wiphy->bands[band];
 757                 if (!sband)
 758                         continue;
 759                 if (!local->use_chanctx && !local->_oper_channel) {
 760                         /* init channel we're on */
 761                         local->hw.conf.channel =
 762                         local->_oper_channel = &sband->channels[0];
 763                         local->hw.conf.channel_type = NL80211_CHAN_NO_HT;
 764                 }
 765                 cfg80211_chandef_create(&local->monitor_chandef,
 766                                         &sband->channels[0],
 767                                         NL80211_CHAN_NO_HT);
 768                 channels += sband->n_channels;
 769
 770                 if (max_bitrates < sband->n_bitrates)
 771                         max_bitrates = sband->n_bitrates;
 772                 supp_ht = supp_ht || sband->ht_cap.ht_supported;
 773                 supp_vht = supp_vht || sband->vht_cap.vht_supported;
 774
 775                 if (sband->ht_cap.ht_supported)
 776                         local->rx_chains =
 777                                 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
 778                                     local->rx_chains);
 779
 780                 /* TODO: consider VHT for RX chains, hopefully it's the same */
 781         }
 782
 783         local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
 784                                       sizeof(void *) * channels, GFP_KERNEL);
 785         if (!local->int_scan_req)
 786                 return -ENOMEM;
 787
 788         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 789                 if (!local->hw.wiphy->bands[band])
 790                         continue;
 791                 local->int_scan_req->rates[band] = (u32) -1;
 792         }
 793
 794         /* if low-level driver supports AP, we also support VLAN */
 795         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
 796                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
 797                 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
 798         }
 799
 800         /* mac80211 always supports monitor */
 801         hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
 802         hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
 803
 804         /* mac80211 doesn't support more than one IBSS interface right now */
 805         for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
 806                 const struct ieee80211_iface_combination *c;
 807                 int j;
 808
 809                 c = &hw->wiphy->iface_combinations[i];
 810
 811                 for (j = 0; j < c->n_limits; j++)
 812                         if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
 813                             c->limits[j].max > 1)
 814                                 return -EINVAL;
 815         }
 816
 817 #ifndef CONFIG_MAC80211_MESH
 818         /* mesh depends on Kconfig, but drivers should set it if they want */
 819         local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
 820 #endif
 821
 822         /* if the underlying driver supports mesh, mac80211 will (at least)
 823          * provide routing of mesh authentication frames to userspace */
 824         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
 825                 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
 826
 827         /* mac80211 supports control port protocol changing */
 828         local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
 829
 830         if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
 831                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
 832         else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)
 833                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
 834
 835         WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)
 836              && (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK),
 837              "U-APSD not supported with HW_PS_NULLFUNC_STACK\n");
 838
 839         /*
 840          * Calculate scan IE length -- we need this to alloc
 841          * memory and to subtract from the driver limit. It
 842          * includes the DS Params, (extended) supported rates, and HT
 843          * information -- SSID is the driver's responsibility.
 844          */
 845         local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
 846                 3 /* DS Params */;
 847         if (supp_ht)
 848                 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
 849
 850         if (supp_vht) {
 851                 local->scan_ies_len +=
 852                         2 + sizeof(struct ieee80211_vht_cap);
 853
 854                 /*
 855                  * (for now at least), drivers wanting to use VHT must
 856                  * support channel contexts, as they contain all the
 857                  * necessary VHT information and the global hw config
 858                  * doesn't (yet)
 859                  */
 860                 if (WARN_ON(!local->use_chanctx)) {
 861                         result = -EINVAL;
 862                         goto fail_wiphy_register;
 863                 }
 864         }
 865
 866         if (!local->ops->hw_scan) {
 867                 /* For hw_scan, driver needs to set these up. */
 868                 local->hw.wiphy->max_scan_ssids = 4;
 869                 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
 870         }
 871
 872         /*
 873          * If the driver supports any scan IEs, then assume the
 874          * limit includes the IEs mac80211 will add, otherwise
 875          * leave it at zero and let the driver sort it out; we
 876          * still pass our IEs to the driver but userspace will
 877          * not be allowed to in that case.
 878          */
 879         if (local->hw.wiphy->max_scan_ie_len)
 880                 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
 881
 882         /* Set up cipher suites unless driver already did */
 883         if (!local->hw.wiphy->cipher_suites) {
 884                 local->hw.wiphy->cipher_suites = cipher_suites;
 885                 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
 886                 if (!(local->hw.flags & IEEE80211_HW_MFP_CAPABLE))
 887                         local->hw.wiphy->n_cipher_suites--;
 888         }
 889         if (IS_ERR(local->wep_tx_tfm) || IS_ERR(local->wep_rx_tfm)) {
 890                 if (local->hw.wiphy->cipher_suites == cipher_suites) {
 891                         local->hw.wiphy->cipher_suites += 2;
 892                         local->hw.wiphy->n_cipher_suites -= 2;
 893                 } else {
 894                         u32 *suites;
 895                         int r, w = 0;
 896
 897                         /* Filter out WEP */
 898
 899                         suites = kmemdup(
 900                                 local->hw.wiphy->cipher_suites,
 901                                 sizeof(u32) * local->hw.wiphy->n_cipher_suites,
 902                                 GFP_KERNEL);
 903                         if (!suites) {
 904                                 result = -ENOMEM;
 905                                 goto fail_wiphy_register;
 906                         }
 907                         for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
 908                                 u32 suite = local->hw.wiphy->cipher_suites[r];
 909                                 if (suite == WLAN_CIPHER_SUITE_WEP40 ||
 910                                     suite == WLAN_CIPHER_SUITE_WEP104)
 911                                         continue;
 912                                 suites[w++] = suite;
 913                         }
 914                         local->hw.wiphy->cipher_suites = suites;
 915                         local->hw.wiphy->n_cipher_suites = w;
 916                         local->wiphy_ciphers_allocated = true;
 917                 }
 918         }
 919
 920         if (!local->ops->remain_on_channel)
 921                 local->hw.wiphy->max_remain_on_channel_duration = 5000;
 922
 923         if (local->ops->sched_scan_start)
 924                 local->hw.wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
 925
 926         /* mac80211 based drivers don't support internal TDLS setup */
 927         if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
 928                 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
 929
 930         result = wiphy_register(local->hw.wiphy);
 931         if (result < 0)
 932                 goto fail_wiphy_register;
 933
 934         /*
 935          * We use the number of queues for feature tests (QoS, HT) internally
 936          * so restrict them appropriately.
 937          */
 938         if (hw->queues > IEEE80211_MAX_QUEUES)
 939                 hw->queues = IEEE80211_MAX_QUEUES;
 940
 941         local->workqueue =
 942                 alloc_ordered_workqueue(wiphy_name(local->hw.wiphy), 0);
 943         if (!local->workqueue) {
 944                 result = -ENOMEM;
 945                 goto fail_workqueue;
 946         }
 947
 948         /*
 949          * The hardware needs headroom for sending the frame,
 950          * and we need some headroom for passing the frame to monitor
 951          * interfaces, but never both at the same time.
 952          */
 953         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
 954                                    IEEE80211_TX_STATUS_HEADROOM);
 955
 956         debugfs_hw_add(local);
 957
 958         /*
 959          * if the driver doesn't specify a max listen interval we
 960          * use 5 which should be a safe default
 961          */
 962         if (local->hw.max_listen_interval == 0)
 963                 local->hw.max_listen_interval = 5;
 964
 965         local->hw.conf.listen_interval = local->hw.max_listen_interval;
 966
 967         local->dynamic_ps_forced_timeout = -1;
 968
 969         result = ieee80211_wep_init(local);
 970         if (result < 0)
 971                 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
 972                             result);
 973
 974         ieee80211_led_init(local);
 975
 976         rtnl_lock();
 977
 978         result = ieee80211_init_rate_ctrl_alg(local,
 979                                               hw->rate_control_algorithm);
 980         if (result < 0) {
 981                 wiphy_debug(local->hw.wiphy,
 982                             "Failed to initialize rate control algorithm\n");
 983                 goto fail_rate;
 984         }
 985
 986         /* add one default STA interface if supported */
 987         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) {
 988                 result = ieee80211_if_add(local, "wlan%d", NULL,
 989                                           NL80211_IFTYPE_STATION, NULL);
 990                 if (result)
 991                         wiphy_warn(local->hw.wiphy,
 992                                    "Failed to add default virtual iface\n");
 993         }
 994
 995         rtnl_unlock();
 996
 997         local->network_latency_notifier.notifier_call =
 998                 ieee80211_max_network_latency;
 999         result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY,
1000                                      &local->network_latency_notifier);
1001         if (result) {
1002                 rtnl_lock();
1003                 goto fail_pm_qos;
1004         }
1005
1006 #ifdef CONFIG_INET
1007         local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1008         result = register_inetaddr_notifier(&local->ifa_notifier);
1009         if (result)
1010                 goto fail_ifa;
1011 #endif
1012
1013 #if IS_ENABLED(CONFIG_IPV6)
1014         local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1015         result = register_inet6addr_notifier(&local->ifa6_notifier);
1016         if (result)
1017                 goto fail_ifa6;
1018 #endif
1019
1020         return 0;
1021
1022 #if IS_ENABLED(CONFIG_IPV6)
1023  fail_ifa6:
1024 #ifdef CONFIG_INET
1025         unregister_inetaddr_notifier(&local->ifa_notifier);
1026 #endif
1027 #endif
1028 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1029  fail_ifa:
1030         pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1031                                &local->network_latency_notifier);
1032         rtnl_lock();
1033 #endif
1034  fail_pm_qos:
1035         ieee80211_led_exit(local);
1036         ieee80211_remove_interfaces(local);
1037  fail_rate:
1038         rtnl_unlock();
1039         ieee80211_wep_free(local);
1040         sta_info_stop(local);
1041         destroy_workqueue(local->workqueue);
1042  fail_workqueue:
1043         wiphy_unregister(local->hw.wiphy);
1044  fail_wiphy_register:
1045         if (local->wiphy_ciphers_allocated)
1046                 kfree(local->hw.wiphy->cipher_suites);
1047         kfree(local->int_scan_req);
1048         return result;
1049 }
1050 EXPORT_SYMBOL(ieee80211_register_hw);
1051
1052 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1053 {
1054         struct ieee80211_local *local = hw_to_local(hw);
1055
1056         tasklet_kill(&local->tx_pending_tasklet);
1057         tasklet_kill(&local->tasklet);
1058
1059         pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1060                                &local->network_latency_notifier);
1061 #ifdef CONFIG_INET
1062         unregister_inetaddr_notifier(&local->ifa_notifier);
1063 #endif
1064 #if IS_ENABLED(CONFIG_IPV6)
1065         unregister_inet6addr_notifier(&local->ifa6_notifier);
1066 #endif
1067
1068         rtnl_lock();
1069
1070         /*
1071          * At this point, interface list manipulations are fine
1072          * because the driver cannot be handing us frames any
1073          * more and the tasklet is killed.
1074          */
1075         ieee80211_remove_interfaces(local);
1076
1077         rtnl_unlock();
1078
1079         cancel_work_sync(&local->restart_work);
1080         cancel_work_sync(&local->reconfig_filter);
1081
1082         ieee80211_clear_tx_pending(local);
1083         rate_control_deinitialize(local);
1084
1085         if (skb_queue_len(&local->skb_queue) ||
1086             skb_queue_len(&local->skb_queue_unreliable))
1087                 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1088         skb_queue_purge(&local->skb_queue);
1089         skb_queue_purge(&local->skb_queue_unreliable);
1090
1091         destroy_workqueue(local->workqueue);
1092         wiphy_unregister(local->hw.wiphy);
1093         sta_info_stop(local);
1094         ieee80211_wep_free(local);
1095         ieee80211_led_exit(local);
1096         kfree(local->int_scan_req);
1097 }
1098 EXPORT_SYMBOL(ieee80211_unregister_hw);
1099
1100 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1101 {
1102         WARN_ONCE(1, "Have pending ack frames!\n");
1103         kfree_skb(p);
1104         return 0;
1105 }
1106
1107 void ieee80211_free_hw(struct ieee80211_hw *hw)
1108 {
1109         struct ieee80211_local *local = hw_to_local(hw);
1110
1111         mutex_destroy(&local->iflist_mtx);
1112         mutex_destroy(&local->mtx);
1113
1114         if (local->wiphy_ciphers_allocated)
1115                 kfree(local->hw.wiphy->cipher_suites);
1116
1117         idr_for_each(&local->ack_status_frames,
1118                      ieee80211_free_ack_frame, NULL);
1119         idr_destroy(&local->ack_status_frames);
1120
1121         wiphy_free(local->hw.wiphy);
1122 }
1123 EXPORT_SYMBOL(ieee80211_free_hw);
1124
1125 static int __init ieee80211_init(void)
1126 {
1127         struct sk_buff *skb;
1128         int ret;
1129
1130         BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1131         BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1132                      IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1133
1134         ret = rc80211_minstrel_init();
1135         if (ret)
1136                 return ret;
1137
1138         ret = rc80211_minstrel_ht_init();
1139         if (ret)
1140                 goto err_minstrel;
1141
1142         ret = rc80211_pid_init();
1143         if (ret)
1144                 goto err_pid;
1145
1146         ret = ieee80211_iface_init();
1147         if (ret)
1148                 goto err_netdev;
1149
1150         return 0;
1151  err_netdev:
1152         rc80211_pid_exit();
1153  err_pid:
1154         rc80211_minstrel_ht_exit();
1155  err_minstrel:
1156         rc80211_minstrel_exit();
1157
1158         return ret;
1159 }
1160
1161 static void __exit ieee80211_exit(void)
1162 {
1163         rc80211_pid_exit();
1164         rc80211_minstrel_ht_exit();
1165         rc80211_minstrel_exit();
1166
1167         ieee80211s_stop();
1168
1169         ieee80211_iface_exit();
1170
1171         rcu_barrier();
1172 }
1173
1174
1175 subsys_initcall(ieee80211_init);
1176 module_exit(ieee80211_exit);
1177
1178 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1179 MODULE_LICENSE("GPL");