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