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 cfg80211_chan_def chandef = {};
  99         u32 changed = 0;
 100         int power;
 101         u32 offchannel_flag;
 102
 103         offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
 104
 105         if (local->scan_chandef.chan) {
 106                 chandef = local->scan_chandef;
 107         } else if (local->tmp_channel) {
 108                 chandef.chan = local->tmp_channel;
 109                 chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
 110                 chandef.center_freq1 = chandef.chan->center_freq;
 111         } else
 112                 chandef = local->_oper_chandef;
 113
 114         WARN(!cfg80211_chandef_valid(&chandef),
 115              "control:%d MHz width:%d center: %d/%d MHz",
 116              chandef.chan->center_freq, chandef.width,
 117              chandef.center_freq1, chandef.center_freq2);
 118
 119         if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef))
 120                 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
 121         else
 122                 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
 123
 124         offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
 125
 126         if (offchannel_flag ||
 127             !cfg80211_chandef_identical(&local->hw.conf.chandef,
 128                                         &local->_oper_chandef)) {
 129                 local->hw.conf.chandef = chandef;
 130                 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
 131         }
 132
 133         if (!conf_is_ht(&local->hw.conf)) {
 134                 /*
 135                  * mac80211.h documents that this is only valid
 136                  * when the channel is set to an HT type, and
 137                  * that otherwise STATIC is used.
 138                  */
 139                 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
 140         } else if (local->hw.conf.smps_mode != local->smps_mode) {
 141                 local->hw.conf.smps_mode = local->smps_mode;
 142                 changed |= IEEE80211_CONF_CHANGE_SMPS;
 143         }
 144
 145         power = ieee80211_chandef_max_power(&chandef);
 146
 147         rcu_read_lock();
 148         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 149                 if (!rcu_access_pointer(sdata->vif.chanctx_conf))
 150                         continue;
 151                 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
 152                         continue;
 153                 power = min(power, sdata->vif.bss_conf.txpower);
 154         }
 155         rcu_read_unlock();
 156
 157         if (local->hw.conf.power_level != power) {
 158                 changed |= IEEE80211_CONF_CHANGE_POWER;
 159                 local->hw.conf.power_level = power;
 160         }
 161
 162         return changed;
 163 }
 164
 165 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
 166 {
 167         int ret = 0;
 168
 169         might_sleep();
 170
 171         if (!local->use_chanctx)
 172                 changed |= ieee80211_hw_conf_chan(local);
 173         else
 174                 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
 175                              IEEE80211_CONF_CHANGE_POWER);
 176
 177         if (changed && local->open_count) {
 178                 ret = drv_config(local, changed);
 179                 /*
 180                  * Goal:
 181                  * HW reconfiguration should never fail, the driver has told
 182                  * us what it can support so it should live up to that promise.
 183                  *
 184                  * Current status:
 185                  * rfkill is not integrated with mac80211 and a
 186                  * configuration command can thus fail if hardware rfkill
 187                  * is enabled
 188                  *
 189                  * FIXME: integrate rfkill with mac80211 and then add this
 190                  * WARN_ON() back
 191                  *
 192                  */
 193                 /* WARN_ON(ret); */
 194         }
 195
 196         return ret;
 197 }
 198
 199 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
 200                                       u32 changed)
 201 {
 202         struct ieee80211_local *local = sdata->local;
 203
 204         if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
 205                 return;
 206
 207         drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
 208 }
 209
 210 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
 211 {
 212         sdata->vif.bss_conf.use_cts_prot = false;
 213         sdata->vif.bss_conf.use_short_preamble = false;
 214         sdata->vif.bss_conf.use_short_slot = false;
 215         return BSS_CHANGED_ERP_CTS_PROT |
 216                BSS_CHANGED_ERP_PREAMBLE |
 217                BSS_CHANGED_ERP_SLOT;
 218 }
 219
 220 static void ieee80211_tasklet_handler(unsigned long data)
 221 {
 222         struct ieee80211_local *local = (struct ieee80211_local *) data;
 223         struct sk_buff *skb;
 224
 225         while ((skb = skb_dequeue(&local->skb_queue)) ||
 226                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
 227                 switch (skb->pkt_type) {
 228                 case IEEE80211_RX_MSG:
 229                         /* Clear skb->pkt_type in order to not confuse kernel
 230                          * netstack. */
 231                         skb->pkt_type = 0;
 232                         ieee80211_rx(&local->hw, skb);
 233                         break;
 234                 case IEEE80211_TX_STATUS_MSG:
 235                         skb->pkt_type = 0;
 236                         ieee80211_tx_status(&local->hw, skb);
 237                         break;
 238                 default:
 239                         WARN(1, "mac80211: Packet is of unknown type %d\n",
 240                              skb->pkt_type);
 241                         dev_kfree_skb(skb);
 242                         break;
 243                 }
 244         }
 245 }
 246
 247 static void ieee80211_restart_work(struct work_struct *work)
 248 {
 249         struct ieee80211_local *local =
 250                 container_of(work, struct ieee80211_local, restart_work);
 251         struct ieee80211_sub_if_data *sdata;
 252
 253         /* wait for scan work complete */
 254         flush_workqueue(local->workqueue);
 255
 256         WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
 257              "%s called with hardware scan in progress\n", __func__);
 258
 259         rtnl_lock();
 260         list_for_each_entry(sdata, &local->interfaces, list)
 261                 flush_delayed_work(&sdata->dec_tailroom_needed_wk);
 262         ieee80211_scan_cancel(local);
 263         ieee80211_reconfig(local);
 264         rtnl_unlock();
 265 }
 266
 267 void ieee80211_restart_hw(struct ieee80211_hw *hw)
 268 {
 269         struct ieee80211_local *local = hw_to_local(hw);
 270
 271         trace_api_restart_hw(local);
 272
 273         wiphy_info(hw->wiphy,
 274                    "Hardware restart was requested\n");
 275
 276         /* use this reason, ieee80211_reconfig will unblock it */
 277         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 278                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND);
 279
 280         /*
 281          * Stop all Rx during the reconfig. We don't want state changes
 282          * or driver callbacks while this is in progress.
 283          */
 284         local->in_reconfig = true;
 285         barrier();
 286
 287         schedule_work(&local->restart_work);
 288 }
 289 EXPORT_SYMBOL(ieee80211_restart_hw);
 290
 291 #ifdef CONFIG_INET
 292 static int ieee80211_ifa_changed(struct notifier_block *nb,
 293                                  unsigned long data, void *arg)
 294 {
 295         struct in_ifaddr *ifa = arg;
 296         struct ieee80211_local *local =
 297                 container_of(nb, struct ieee80211_local,
 298                              ifa_notifier);
 299         struct net_device *ndev = ifa->ifa_dev->dev;
 300         struct wireless_dev *wdev = ndev->ieee80211_ptr;
 301         struct in_device *idev;
 302         struct ieee80211_sub_if_data *sdata;
 303         struct ieee80211_bss_conf *bss_conf;
 304         struct ieee80211_if_managed *ifmgd;
 305         int c = 0;
 306
 307         /* Make sure it's our interface that got changed */
 308         if (!wdev)
 309                 return NOTIFY_DONE;
 310
 311         if (wdev->wiphy != local->hw.wiphy)
 312                 return NOTIFY_DONE;
 313
 314         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
 315         bss_conf = &sdata->vif.bss_conf;
 316
 317         /* ARP filtering is only supported in managed mode */
 318         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 319                 return NOTIFY_DONE;
 320
 321         idev = __in_dev_get_rtnl(sdata->dev);
 322         if (!idev)
 323                 return NOTIFY_DONE;
 324
 325         ifmgd = &sdata->u.mgd;
 326         sdata_lock(sdata);
 327
 328         /* Copy the addresses to the bss_conf list */
 329         ifa = idev->ifa_list;
 330         while (ifa) {
 331                 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
 332                         bss_conf->arp_addr_list[c] = ifa->ifa_address;
 333                 ifa = ifa->ifa_next;
 334                 c++;
 335         }
 336
 337         bss_conf->arp_addr_cnt = c;
 338
 339         /* Configure driver only if associated (which also implies it is up) */
 340         if (ifmgd->associated)
 341                 ieee80211_bss_info_change_notify(sdata,
 342                                                  BSS_CHANGED_ARP_FILTER);
 343
 344         sdata_unlock(sdata);
 345
 346         return NOTIFY_OK;
 347 }
 348 #endif
 349
 350 #if IS_ENABLED(CONFIG_IPV6)
 351 static int ieee80211_ifa6_changed(struct notifier_block *nb,
 352                                   unsigned long data, void *arg)
 353 {
 354         struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
 355         struct inet6_dev *idev = ifa->idev;
 356         struct net_device *ndev = ifa->idev->dev;
 357         struct ieee80211_local *local =
 358                 container_of(nb, struct ieee80211_local, ifa6_notifier);
 359         struct wireless_dev *wdev = ndev->ieee80211_ptr;
 360         struct ieee80211_sub_if_data *sdata;
 361
 362         /* Make sure it's our interface that got changed */
 363         if (!wdev || wdev->wiphy != local->hw.wiphy)
 364                 return NOTIFY_DONE;
 365
 366         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
 367
 368         /*
 369          * For now only support station mode. This is mostly because
 370          * doing AP would have to handle AP_VLAN in some way ...
 371          */
 372         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 373                 return NOTIFY_DONE;
 374
 375         drv_ipv6_addr_change(local, sdata, idev);
 376
 377         return NOTIFY_OK;
 378 }
 379 #endif
 380
 381 /* There isn't a lot of sense in it, but you can transmit anything you like */
 382 static const struct ieee80211_txrx_stypes
 383 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
 384         [NL80211_IFTYPE_ADHOC] = {
 385                 .tx = 0xffff,
 386                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 387                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 388                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 389                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 390         },
 391         [NL80211_IFTYPE_STATION] = {
 392                 .tx = 0xffff,
 393                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 394                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 395         },
 396         [NL80211_IFTYPE_AP] = {
 397                 .tx = 0xffff,
 398                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 399                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 400                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 401                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 402                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 403                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 404                         BIT(IEEE80211_STYPE_ACTION >> 4),
 405         },
 406         [NL80211_IFTYPE_AP_VLAN] = {
 407                 /* copy AP */
 408                 .tx = 0xffff,
 409                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 410                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 411                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 412                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 413                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 414                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 415                         BIT(IEEE80211_STYPE_ACTION >> 4),
 416         },
 417         [NL80211_IFTYPE_P2P_CLIENT] = {
 418                 .tx = 0xffff,
 419                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 420                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 421         },
 422         [NL80211_IFTYPE_P2P_GO] = {
 423                 .tx = 0xffff,
 424                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 425                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 426                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 427                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 428                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 429                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 430                         BIT(IEEE80211_STYPE_ACTION >> 4),
 431         },
 432         [NL80211_IFTYPE_MESH_POINT] = {
 433                 .tx = 0xffff,
 434                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 435                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 436                         BIT(IEEE80211_STYPE_DEAUTH >> 4),
 437         },
 438         [NL80211_IFTYPE_P2P_DEVICE] = {
 439                 .tx = 0xffff,
 440                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 441                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 442         },
 443 };
 444
 445 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
 446         .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
 447                              IEEE80211_HT_AMPDU_PARM_DENSITY,
 448
 449         .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
 450                                 IEEE80211_HT_CAP_MAX_AMSDU |
 451                                 IEEE80211_HT_CAP_SGI_20 |
 452                                 IEEE80211_HT_CAP_SGI_40 |
 453                                 IEEE80211_HT_CAP_LDPC_CODING |
 454                                 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
 455         .mcs = {
 456                 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
 457                              0xff, 0xff, 0xff, 0xff, 0xff, },
 458         },
 459 };
 460
 461 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
 462         .vht_cap_info =
 463                 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
 464                             IEEE80211_VHT_CAP_SHORT_GI_80 |
 465                             IEEE80211_VHT_CAP_SHORT_GI_160 |
 466                             IEEE80211_VHT_CAP_RXSTBC_1 |
 467                             IEEE80211_VHT_CAP_RXSTBC_2 |
 468                             IEEE80211_VHT_CAP_RXSTBC_3 |
 469                             IEEE80211_VHT_CAP_RXSTBC_4 |
 470                             IEEE80211_VHT_CAP_TXSTBC |
 471                             IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
 472                             IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
 473                             IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
 474                             IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
 475                             IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
 476         .supp_mcs = {
 477                 .rx_mcs_map = cpu_to_le16(~0),
 478                 .tx_mcs_map = cpu_to_le16(~0),
 479         },
 480 };
 481
 482 static const u8 extended_capabilities[] = {
 483         0, 0, 0, 0, 0, 0, 0,
 484         WLAN_EXT_CAPA8_OPMODE_NOTIF,
 485 };
 486
 487 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
 488                                         const struct ieee80211_ops *ops)
 489 {
 490         struct ieee80211_local *local;
 491         int priv_size, i;
 492         struct wiphy *wiphy;
 493         bool use_chanctx;
 494
 495         if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
 496                     !ops->add_interface || !ops->remove_interface ||
 497                     !ops->configure_filter))
 498                 return NULL;
 499
 500         if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
 501                 return NULL;
 502
 503         /* check all or no channel context operations exist */
 504         i = !!ops->add_chanctx + !!ops->remove_chanctx +
 505             !!ops->change_chanctx + !!ops->assign_vif_chanctx +
 506             !!ops->unassign_vif_chanctx;
 507         if (WARN_ON(i != 0 && i != 5))
 508                 return NULL;
 509         use_chanctx = i == 5;
 510
 511         /* Ensure 32-byte alignment of our private data and hw private data.
 512          * We use the wiphy priv data for both our ieee80211_local and for
 513          * the driver's private data
 514          *
 515          * In memory it'll be like this:
 516          *
 517          * +-------------------------+
 518          * | struct wiphy           |
 519          * +-------------------------+
 520          * | struct ieee80211_local  |
 521          * +-------------------------+
 522          * | driver's private data   |
 523          * +-------------------------+
 524          *
 525          */
 526         priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
 527
 528         wiphy = wiphy_new(&mac80211_config_ops, priv_size);
 529
 530         if (!wiphy)
 531                 return NULL;
 532
 533         wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
 534
 535         wiphy->privid = mac80211_wiphy_privid;
 536
 537         wiphy->flags |= WIPHY_FLAG_NETNS_OK |
 538                         WIPHY_FLAG_4ADDR_AP |
 539                         WIPHY_FLAG_4ADDR_STATION |
 540                         WIPHY_FLAG_REPORTS_OBSS |
 541                         WIPHY_FLAG_OFFCHAN_TX;
 542
 543         wiphy->extended_capabilities = extended_capabilities;
 544         wiphy->extended_capabilities_mask = extended_capabilities;
 545         wiphy->extended_capabilities_len = ARRAY_SIZE(extended_capabilities);
 546
 547         if (ops->remain_on_channel)
 548                 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
 549
 550         wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
 551                            NL80211_FEATURE_SAE |
 552                            NL80211_FEATURE_HT_IBSS |
 553                            NL80211_FEATURE_VIF_TXPOWER |
 554                            NL80211_FEATURE_USERSPACE_MPM;
 555
 556         if (!ops->hw_scan)
 557                 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
 558                                    NL80211_FEATURE_AP_SCAN;
 559
 560
 561         if (!ops->set_key)
 562                 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 563
 564         wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
 565
 566         local = wiphy_priv(wiphy);
 567
 568         local->hw.wiphy = wiphy;
 569
 570         local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
 571
 572         local->ops = ops;
 573         local->use_chanctx = use_chanctx;
 574
 575         /* set up some defaults */
 576         local->hw.queues = 1;
 577         local->hw.max_rates = 1;
 578         local->hw.max_report_rates = 0;
 579         local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
 580         local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
 581         local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
 582         local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
 583         local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
 584         local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
 585                                          IEEE80211_RADIOTAP_MCS_HAVE_GI |
 586                                          IEEE80211_RADIOTAP_MCS_HAVE_BW;
 587         local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
 588                                          IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
 589         local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
 590         local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
 591         local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
 592         wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
 593         wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
 594
 595         INIT_LIST_HEAD(&local->interfaces);
 596
 597         __hw_addr_init(&local->mc_list);
 598
 599         mutex_init(&local->iflist_mtx);
 600         mutex_init(&local->mtx);
 601
 602         mutex_init(&local->key_mtx);
 603         spin_lock_init(&local->filter_lock);
 604         spin_lock_init(&local->rx_path_lock);
 605         spin_lock_init(&local->queue_stop_reason_lock);
 606
 607         INIT_LIST_HEAD(&local->chanctx_list);
 608         mutex_init(&local->chanctx_mtx);
 609
 610         INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
 611
 612         INIT_WORK(&local->restart_work, ieee80211_restart_work);
 613
 614         INIT_WORK(&local->radar_detected_work,
 615                   ieee80211_dfs_radar_detected_work);
 616
 617         INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
 618         local->smps_mode = IEEE80211_SMPS_OFF;
 619
 620         INIT_WORK(&local->dynamic_ps_enable_work,
 621                   ieee80211_dynamic_ps_enable_work);
 622         INIT_WORK(&local->dynamic_ps_disable_work,
 623                   ieee80211_dynamic_ps_disable_work);
 624         setup_timer(&local->dynamic_ps_timer,
 625                     ieee80211_dynamic_ps_timer, (unsigned long) local);
 626
 627         INIT_WORK(&local->sched_scan_stopped_work,
 628                   ieee80211_sched_scan_stopped_work);
 629
 630         spin_lock_init(&local->ack_status_lock);
 631         idr_init(&local->ack_status_frames);
 632
 633         sta_info_init(local);
 634
 635         for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
 636                 skb_queue_head_init(&local->pending[i]);
 637                 atomic_set(&local->agg_queue_stop[i], 0);
 638         }
 639         tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
 640                      (unsigned long)local);
 641
 642         tasklet_init(&local->tasklet,
 643                      ieee80211_tasklet_handler,
 644                      (unsigned long) local);
 645
 646         skb_queue_head_init(&local->skb_queue);
 647         skb_queue_head_init(&local->skb_queue_unreliable);
 648
 649         ieee80211_led_names(local);
 650
 651         ieee80211_roc_setup(local);
 652
 653         return &local->hw;
 654 }
 655 EXPORT_SYMBOL(ieee80211_alloc_hw);
 656
 657 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
 658 {
 659         bool have_wep = !(IS_ERR(local->wep_tx_tfm) ||
 660                           IS_ERR(local->wep_rx_tfm));
 661         bool have_mfp = local->hw.flags & IEEE80211_HW_MFP_CAPABLE;
 662         const struct ieee80211_cipher_scheme *cs = local->hw.cipher_schemes;
 663         int n_suites = 0, r = 0, w = 0;
 664         u32 *suites;
 665         static const u32 cipher_suites[] = {
 666                 /* keep WEP first, it may be removed below */
 667                 WLAN_CIPHER_SUITE_WEP40,
 668                 WLAN_CIPHER_SUITE_WEP104,
 669                 WLAN_CIPHER_SUITE_TKIP,
 670                 WLAN_CIPHER_SUITE_CCMP,
 671
 672                 /* keep last -- depends on hw flags! */
 673                 WLAN_CIPHER_SUITE_AES_CMAC
 674         };
 675
 676         /* Driver specifies the ciphers, we have nothing to do... */
 677         if (local->hw.wiphy->cipher_suites && have_wep)
 678                 return 0;
 679
 680         /* Set up cipher suites if driver relies on mac80211 cipher defs */
 681         if (!local->hw.wiphy->cipher_suites && !cs) {
 682                 local->hw.wiphy->cipher_suites = cipher_suites;
 683                 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
 684
 685                 if (!have_mfp)
 686                         local->hw.wiphy->n_cipher_suites--;
 687
 688                 if (!have_wep) {
 689                         local->hw.wiphy->cipher_suites += 2;
 690                         local->hw.wiphy->n_cipher_suites -= 2;
 691                 }
 692
 693                 return 0;
 694         }
 695
 696         if (!local->hw.wiphy->cipher_suites) {
 697                 /*
 698                  * Driver specifies cipher schemes only
 699                  * We start counting ciphers defined by schemes, TKIP and CCMP
 700                  */
 701                 n_suites = local->hw.n_cipher_schemes + 2;
 702
 703                 /* check if we have WEP40 and WEP104 */
 704                 if (have_wep)
 705                         n_suites += 2;
 706
 707                 /* check if we have AES_CMAC */
 708                 if (have_mfp)
 709                         n_suites++;
 710
 711                 suites = kmalloc(sizeof(u32) * n_suites, GFP_KERNEL);
 712                 if (!suites)
 713                         return -ENOMEM;
 714
 715                 suites[w++] = WLAN_CIPHER_SUITE_CCMP;
 716                 suites[w++] = WLAN_CIPHER_SUITE_TKIP;
 717
 718                 if (have_wep) {
 719                         suites[w++] = WLAN_CIPHER_SUITE_WEP40;
 720                         suites[w++] = WLAN_CIPHER_SUITE_WEP104;
 721                 }
 722
 723                 if (have_mfp)
 724                         suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC;
 725
 726                 for (r = 0; r < local->hw.n_cipher_schemes; r++)
 727                         suites[w++] = cs[r].cipher;
 728         } else {
 729                 /* Driver provides cipher suites, but we need to exclude WEP */
 730                 suites = kmemdup(local->hw.wiphy->cipher_suites,
 731                                  sizeof(u32) * local->hw.wiphy->n_cipher_suites,
 732                                  GFP_KERNEL);
 733                 if (!suites)
 734                         return -ENOMEM;
 735
 736                 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
 737                         u32 suite = local->hw.wiphy->cipher_suites[r];
 738
 739                         if (suite == WLAN_CIPHER_SUITE_WEP40 ||
 740                             suite == WLAN_CIPHER_SUITE_WEP104)
 741                                 continue;
 742                         suites[w++] = suite;
 743                 }
 744         }
 745
 746         local->hw.wiphy->cipher_suites = suites;
 747         local->hw.wiphy->n_cipher_suites = w;
 748         local->wiphy_ciphers_allocated = true;
 749
 750         return 0;
 751 }
 752
 753 int ieee80211_register_hw(struct ieee80211_hw *hw)
 754 {
 755         struct ieee80211_local *local = hw_to_local(hw);
 756         int result, i;
 757         enum ieee80211_band band;
 758         int channels, max_bitrates;
 759         bool supp_ht, supp_vht;
 760         netdev_features_t feature_whitelist;
 761         struct cfg80211_chan_def dflt_chandef = {};
 762
 763         if (hw->flags & IEEE80211_HW_QUEUE_CONTROL &&
 764             (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
 765              local->hw.offchannel_tx_hw_queue >= local->hw.queues))
 766                 return -EINVAL;
 767
 768 #ifdef CONFIG_PM
 769         if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
 770                 return -EINVAL;
 771 #endif
 772
 773         if (!local->use_chanctx) {
 774                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
 775                         const struct ieee80211_iface_combination *comb;
 776
 777                         comb = &local->hw.wiphy->iface_combinations[i];
 778
 779                         if (comb->num_different_channels > 1)
 780                                 return -EINVAL;
 781                 }
 782         } else {
 783                 /*
 784                  * WDS is currently prohibited when channel contexts are used
 785                  * because there's no clear definition of which channel WDS
 786                  * type interfaces use
 787                  */
 788                 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
 789                         return -EINVAL;
 790
 791                 /* DFS currently not supported with channel context drivers */
 792                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
 793                         const struct ieee80211_iface_combination *comb;
 794
 795                         comb = &local->hw.wiphy->iface_combinations[i];
 796
 797                         if (comb->radar_detect_widths)
 798                                 return -EINVAL;
 799                 }
 800         }
 801
 802         /* Only HW csum features are currently compatible with mac80211 */
 803         feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
 804                             NETIF_F_HW_CSUM;
 805         if (WARN_ON(hw->netdev_features & ~feature_whitelist))
 806                 return -EINVAL;
 807
 808         if (hw->max_report_rates == 0)
 809                 hw->max_report_rates = hw->max_rates;
 810
 811         local->rx_chains = 1;
 812
 813         /*
 814          * generic code guarantees at least one band,
 815          * set this very early because much code assumes
 816          * that hw.conf.channel is assigned
 817          */
 818         channels = 0;
 819         max_bitrates = 0;
 820         supp_ht = false;
 821         supp_vht = false;
 822         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 823                 struct ieee80211_supported_band *sband;
 824
 825                 sband = local->hw.wiphy->bands[band];
 826                 if (!sband)
 827                         continue;
 828
 829                 if (!dflt_chandef.chan) {
 830                         cfg80211_chandef_create(&dflt_chandef,
 831                                                 &sband->channels[0],
 832                                                 NL80211_CHAN_NO_HT);
 833                         /* init channel we're on */
 834                         if (!local->use_chanctx && !local->_oper_chandef.chan) {
 835                                 local->hw.conf.chandef = dflt_chandef;
 836                                 local->_oper_chandef = dflt_chandef;
 837                         }
 838                         local->monitor_chandef = dflt_chandef;
 839                 }
 840
 841                 channels += sband->n_channels;
 842
 843                 if (max_bitrates < sband->n_bitrates)
 844                         max_bitrates = sband->n_bitrates;
 845                 supp_ht = supp_ht || sband->ht_cap.ht_supported;
 846                 supp_vht = supp_vht || sband->vht_cap.vht_supported;
 847
 848                 if (sband->ht_cap.ht_supported)
 849                         local->rx_chains =
 850                                 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
 851                                     local->rx_chains);
 852
 853                 /* TODO: consider VHT for RX chains, hopefully it's the same */
 854         }
 855
 856         /* if low-level driver supports AP, we also support VLAN */
 857         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
 858                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
 859                 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
 860         }
 861
 862         /* mac80211 always supports monitor */
 863         hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
 864         hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
 865
 866         /* mac80211 doesn't support more than one IBSS interface right now */
 867         for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
 868                 const struct ieee80211_iface_combination *c;
 869                 int j;
 870
 871                 c = &hw->wiphy->iface_combinations[i];
 872
 873                 for (j = 0; j < c->n_limits; j++)
 874                         if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
 875                             c->limits[j].max > 1)
 876                                 return -EINVAL;
 877         }
 878
 879         local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
 880                                       sizeof(void *) * channels, GFP_KERNEL);
 881         if (!local->int_scan_req)
 882                 return -ENOMEM;
 883
 884         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 885                 if (!local->hw.wiphy->bands[band])
 886                         continue;
 887                 local->int_scan_req->rates[band] = (u32) -1;
 888         }
 889
 890 #ifndef CONFIG_MAC80211_MESH
 891         /* mesh depends on Kconfig, but drivers should set it if they want */
 892         local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
 893 #endif
 894
 895         /* if the underlying driver supports mesh, mac80211 will (at least)
 896          * provide routing of mesh authentication frames to userspace */
 897         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
 898                 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
 899
 900         /* mac80211 supports control port protocol changing */
 901         local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
 902
 903         if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) {
 904                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
 905         } else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC) {
 906                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
 907                 if (hw->max_signal <= 0) {
 908                         result = -EINVAL;
 909                         goto fail_wiphy_register;
 910                 }
 911         }
 912
 913         WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)
 914              && (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK),
 915              "U-APSD not supported with HW_PS_NULLFUNC_STACK\n");
 916
 917         /*
 918          * Calculate scan IE length -- we need this to alloc
 919          * memory and to subtract from the driver limit. It
 920          * includes the DS Params, (extended) supported rates, and HT
 921          * information -- SSID is the driver's responsibility.
 922          */
 923         local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
 924                 3 /* DS Params */;
 925         if (supp_ht)
 926                 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
 927
 928         if (supp_vht)
 929                 local->scan_ies_len +=
 930                         2 + sizeof(struct ieee80211_vht_cap);
 931
 932         if (!local->ops->hw_scan) {
 933                 /* For hw_scan, driver needs to set these up. */
 934                 local->hw.wiphy->max_scan_ssids = 4;
 935                 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
 936         }
 937
 938         /*
 939          * If the driver supports any scan IEs, then assume the
 940          * limit includes the IEs mac80211 will add, otherwise
 941          * leave it at zero and let the driver sort it out; we
 942          * still pass our IEs to the driver but userspace will
 943          * not be allowed to in that case.
 944          */
 945         if (local->hw.wiphy->max_scan_ie_len)
 946                 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
 947
 948         WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes,
 949                                          local->hw.n_cipher_schemes));
 950
 951         result = ieee80211_init_cipher_suites(local);
 952         if (result < 0)
 953                 goto fail_wiphy_register;
 954
 955         if (!local->ops->remain_on_channel)
 956                 local->hw.wiphy->max_remain_on_channel_duration = 5000;
 957
 958         /* mac80211 based drivers don't support internal TDLS setup */
 959         if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
 960                 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
 961
 962         local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM;
 963
 964         result = wiphy_register(local->hw.wiphy);
 965         if (result < 0)
 966                 goto fail_wiphy_register;
 967
 968         /*
 969          * We use the number of queues for feature tests (QoS, HT) internally
 970          * so restrict them appropriately.
 971          */
 972         if (hw->queues > IEEE80211_MAX_QUEUES)
 973                 hw->queues = IEEE80211_MAX_QUEUES;
 974
 975         local->workqueue =
 976                 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
 977         if (!local->workqueue) {
 978                 result = -ENOMEM;
 979                 goto fail_workqueue;
 980         }
 981
 982         /*
 983          * The hardware needs headroom for sending the frame,
 984          * and we need some headroom for passing the frame to monitor
 985          * interfaces, but never both at the same time.
 986          */
 987         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
 988                                    IEEE80211_TX_STATUS_HEADROOM);
 989
 990         debugfs_hw_add(local);
 991
 992         /*
 993          * if the driver doesn't specify a max listen interval we
 994          * use 5 which should be a safe default
 995          */
 996         if (local->hw.max_listen_interval == 0)
 997                 local->hw.max_listen_interval = 5;
 998
 999         local->hw.conf.listen_interval = local->hw.max_listen_interval;
1000
1001         local->dynamic_ps_forced_timeout = -1;
1002
1003         result = ieee80211_wep_init(local);
1004         if (result < 0)
1005                 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
1006                             result);
1007
1008         local->hw.conf.flags = IEEE80211_CONF_IDLE;
1009
1010         ieee80211_led_init(local);
1011
1012         rtnl_lock();
1013
1014         result = ieee80211_init_rate_ctrl_alg(local,
1015                                               hw->rate_control_algorithm);
1016         if (result < 0) {
1017                 wiphy_debug(local->hw.wiphy,
1018                             "Failed to initialize rate control algorithm\n");
1019                 goto fail_rate;
1020         }
1021
1022         /* add one default STA interface if supported */
1023         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) {
1024                 result = ieee80211_if_add(local, "wlan%d", NULL,
1025                                           NL80211_IFTYPE_STATION, NULL);
1026                 if (result)
1027                         wiphy_warn(local->hw.wiphy,
1028                                    "Failed to add default virtual iface\n");
1029         }
1030
1031         rtnl_unlock();
1032
1033         local->network_latency_notifier.notifier_call =
1034                 ieee80211_max_network_latency;
1035         result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY,
1036                                      &local->network_latency_notifier);
1037         if (result) {
1038                 rtnl_lock();
1039                 goto fail_pm_qos;
1040         }
1041
1042 #ifdef CONFIG_INET
1043         local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1044         result = register_inetaddr_notifier(&local->ifa_notifier);
1045         if (result)
1046                 goto fail_ifa;
1047 #endif
1048
1049 #if IS_ENABLED(CONFIG_IPV6)
1050         local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1051         result = register_inet6addr_notifier(&local->ifa6_notifier);
1052         if (result)
1053                 goto fail_ifa6;
1054 #endif
1055
1056         return 0;
1057
1058 #if IS_ENABLED(CONFIG_IPV6)
1059  fail_ifa6:
1060 #ifdef CONFIG_INET
1061         unregister_inetaddr_notifier(&local->ifa_notifier);
1062 #endif
1063 #endif
1064 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1065  fail_ifa:
1066         pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1067                                &local->network_latency_notifier);
1068         rtnl_lock();
1069 #endif
1070  fail_pm_qos:
1071         ieee80211_led_exit(local);
1072         ieee80211_remove_interfaces(local);
1073  fail_rate:
1074         rtnl_unlock();
1075         ieee80211_wep_free(local);
1076         sta_info_stop(local);
1077         destroy_workqueue(local->workqueue);
1078  fail_workqueue:
1079         wiphy_unregister(local->hw.wiphy);
1080  fail_wiphy_register:
1081         if (local->wiphy_ciphers_allocated)
1082                 kfree(local->hw.wiphy->cipher_suites);
1083         kfree(local->int_scan_req);
1084         return result;
1085 }
1086 EXPORT_SYMBOL(ieee80211_register_hw);
1087
1088 void ieee80211_napi_add(struct ieee80211_hw *hw, struct napi_struct *napi,
1089                         struct net_device *napi_dev,
1090                         int (*poll)(struct napi_struct *, int),
1091                         int weight)
1092 {
1093         struct ieee80211_local *local = hw_to_local(hw);
1094
1095         netif_napi_add(napi_dev, napi, poll, weight);
1096         local->napi = napi;
1097 }
1098 EXPORT_SYMBOL_GPL(ieee80211_napi_add);
1099
1100 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1101 {
1102         struct ieee80211_local *local = hw_to_local(hw);
1103
1104         tasklet_kill(&local->tx_pending_tasklet);
1105         tasklet_kill(&local->tasklet);
1106
1107         pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1108                                &local->network_latency_notifier);
1109 #ifdef CONFIG_INET
1110         unregister_inetaddr_notifier(&local->ifa_notifier);
1111 #endif
1112 #if IS_ENABLED(CONFIG_IPV6)
1113         unregister_inet6addr_notifier(&local->ifa6_notifier);
1114 #endif
1115
1116         rtnl_lock();
1117
1118         /*
1119          * At this point, interface list manipulations are fine
1120          * because the driver cannot be handing us frames any
1121          * more and the tasklet is killed.
1122          */
1123         ieee80211_remove_interfaces(local);
1124
1125         rtnl_unlock();
1126
1127         cancel_work_sync(&local->restart_work);
1128         cancel_work_sync(&local->reconfig_filter);
1129         flush_work(&local->sched_scan_stopped_work);
1130
1131         ieee80211_clear_tx_pending(local);
1132         rate_control_deinitialize(local);
1133
1134         if (skb_queue_len(&local->skb_queue) ||
1135             skb_queue_len(&local->skb_queue_unreliable))
1136                 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1137         skb_queue_purge(&local->skb_queue);
1138         skb_queue_purge(&local->skb_queue_unreliable);
1139
1140         destroy_workqueue(local->workqueue);
1141         wiphy_unregister(local->hw.wiphy);
1142         sta_info_stop(local);
1143         ieee80211_wep_free(local);
1144         ieee80211_led_exit(local);
1145         kfree(local->int_scan_req);
1146 }
1147 EXPORT_SYMBOL(ieee80211_unregister_hw);
1148
1149 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1150 {
1151         WARN_ONCE(1, "Have pending ack frames!\n");
1152         kfree_skb(p);
1153         return 0;
1154 }
1155
1156 void ieee80211_free_hw(struct ieee80211_hw *hw)
1157 {
1158         struct ieee80211_local *local = hw_to_local(hw);
1159
1160         mutex_destroy(&local->iflist_mtx);
1161         mutex_destroy(&local->mtx);
1162
1163         if (local->wiphy_ciphers_allocated)
1164                 kfree(local->hw.wiphy->cipher_suites);
1165
1166         idr_for_each(&local->ack_status_frames,
1167                      ieee80211_free_ack_frame, NULL);
1168         idr_destroy(&local->ack_status_frames);
1169
1170         kfree(rcu_access_pointer(local->tx_latency));
1171
1172         wiphy_free(local->hw.wiphy);
1173 }
1174 EXPORT_SYMBOL(ieee80211_free_hw);
1175
1176 static int __init ieee80211_init(void)
1177 {
1178         struct sk_buff *skb;
1179         int ret;
1180
1181         BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1182         BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1183                      IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1184
1185         ret = rc80211_minstrel_init();
1186         if (ret)
1187                 return ret;
1188
1189         ret = rc80211_minstrel_ht_init();
1190         if (ret)
1191                 goto err_minstrel;
1192
1193         ret = rc80211_pid_init();
1194         if (ret)
1195                 goto err_pid;
1196
1197         ret = ieee80211_iface_init();
1198         if (ret)
1199                 goto err_netdev;
1200
1201         return 0;
1202  err_netdev:
1203         rc80211_pid_exit();
1204  err_pid:
1205         rc80211_minstrel_ht_exit();
1206  err_minstrel:
1207         rc80211_minstrel_exit();
1208
1209         return ret;
1210 }
1211
1212 static void __exit ieee80211_exit(void)
1213 {
1214         rc80211_pid_exit();
1215         rc80211_minstrel_ht_exit();
1216         rc80211_minstrel_exit();
1217
1218         ieee80211s_stop();
1219
1220         ieee80211_iface_exit();
1221
1222         rcu_barrier();
1223 }
1224
1225
1226 subsys_initcall(ieee80211_init);
1227 module_exit(ieee80211_exit);
1228
1229 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1230 MODULE_LICENSE("GPL");