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  * Copyright 2013-2014  Intel Mobile Communications GmbH
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11
  12 #include <net/mac80211.h>
  13 #include <linux/module.h>
  14 #include <linux/init.h>
  15 #include <linux/netdevice.h>
  16 #include <linux/types.h>
  17 #include <linux/slab.h>
  18 #include <linux/skbuff.h>
  19 #include <linux/etherdevice.h>
  20 #include <linux/if_arp.h>
  21 #include <linux/rtnetlink.h>
  22 #include <linux/bitmap.h>
  23 #include <linux/pm_qos.h>
  24 #include <linux/inetdevice.h>
  25 #include <net/net_namespace.h>
  26 #include <net/cfg80211.h>
  27 #include <net/addrconf.h>
  28
  29 #include "ieee80211_i.h"
  30 #include "driver-ops.h"
  31 #include "rate.h"
  32 #include "mesh.h"
  33 #include "wep.h"
  34 #include "led.h"
  35 #include "cfg.h"
  36 #include "debugfs.h"
  37
  38 void ieee80211_configure_filter(struct ieee80211_local *local)
  39 {
  40         u64 mc;
  41         unsigned int changed_flags;
  42         unsigned int new_flags = 0;
  43
  44         if (atomic_read(&local->iff_promiscs))
  45                 new_flags |= FIF_PROMISC_IN_BSS;
  46
  47         if (atomic_read(&local->iff_allmultis))
  48                 new_flags |= FIF_ALLMULTI;
  49
  50         if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) ||
  51             test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning))
  52                 new_flags |= FIF_BCN_PRBRESP_PROMISC;
  53
  54         if (local->fif_probe_req || local->probe_req_reg)
  55                 new_flags |= FIF_PROBE_REQ;
  56
  57         if (local->fif_fcsfail)
  58                 new_flags |= FIF_FCSFAIL;
  59
  60         if (local->fif_plcpfail)
  61                 new_flags |= FIF_PLCPFAIL;
  62
  63         if (local->fif_control)
  64                 new_flags |= FIF_CONTROL;
  65
  66         if (local->fif_other_bss)
  67                 new_flags |= FIF_OTHER_BSS;
  68
  69         if (local->fif_pspoll)
  70                 new_flags |= FIF_PSPOLL;
  71
  72         spin_lock_bh(&local->filter_lock);
  73         changed_flags = local->filter_flags ^ new_flags;
  74
  75         mc = drv_prepare_multicast(local, &local->mc_list);
  76         spin_unlock_bh(&local->filter_lock);
  77
  78         /* be a bit nasty */
  79         new_flags |= (1<<31);
  80
  81         drv_configure_filter(local, changed_flags, &new_flags, mc);
  82
  83         WARN_ON(new_flags & (1<<31));
  84
  85         local->filter_flags = new_flags & ~(1<<31);
  86 }
  87
  88 static void ieee80211_reconfig_filter(struct work_struct *work)
  89 {
  90         struct ieee80211_local *local =
  91                 container_of(work, struct ieee80211_local, reconfig_filter);
  92
  93         ieee80211_configure_filter(local);
  94 }
  95
  96 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
  97 {
  98         struct ieee80211_sub_if_data *sdata;
  99         struct cfg80211_chan_def chandef = {};
 100         u32 changed = 0;
 101         int power;
 102         u32 offchannel_flag;
 103
 104         offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
 105
 106         if (local->scan_chandef.chan) {
 107                 chandef = local->scan_chandef;
 108         } else if (local->tmp_channel) {
 109                 chandef.chan = local->tmp_channel;
 110                 chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
 111                 chandef.center_freq1 = chandef.chan->center_freq;
 112         } else
 113                 chandef = local->_oper_chandef;
 114
 115         WARN(!cfg80211_chandef_valid(&chandef),
 116              "control:%d MHz width:%d center: %d/%d MHz",
 117              chandef.chan->center_freq, chandef.width,
 118              chandef.center_freq1, chandef.center_freq2);
 119
 120         if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef))
 121                 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
 122         else
 123                 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
 124
 125         offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
 126
 127         if (offchannel_flag ||
 128             !cfg80211_chandef_identical(&local->hw.conf.chandef,
 129                                         &local->_oper_chandef)) {
 130                 local->hw.conf.chandef = chandef;
 131                 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
 132         }
 133
 134         if (!conf_is_ht(&local->hw.conf)) {
 135                 /*
 136                  * mac80211.h documents that this is only valid
 137                  * when the channel is set to an HT type, and
 138                  * that otherwise STATIC is used.
 139                  */
 140                 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
 141         } else if (local->hw.conf.smps_mode != local->smps_mode) {
 142                 local->hw.conf.smps_mode = local->smps_mode;
 143                 changed |= IEEE80211_CONF_CHANGE_SMPS;
 144         }
 145
 146         power = ieee80211_chandef_max_power(&chandef);
 147
 148         rcu_read_lock();
 149         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 150                 if (!rcu_access_pointer(sdata->vif.chanctx_conf))
 151                         continue;
 152                 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
 153                         continue;
 154                 power = min(power, sdata->vif.bss_conf.txpower);
 155         }
 156         rcu_read_unlock();
 157
 158         if (local->hw.conf.power_level != power) {
 159                 changed |= IEEE80211_CONF_CHANGE_POWER;
 160                 local->hw.conf.power_level = power;
 161         }
 162
 163         return changed;
 164 }
 165
 166 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
 167 {
 168         int ret = 0;
 169
 170         might_sleep();
 171
 172         if (!local->use_chanctx)
 173                 changed |= ieee80211_hw_conf_chan(local);
 174         else
 175                 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
 176                              IEEE80211_CONF_CHANGE_POWER);
 177
 178         if (changed && local->open_count) {
 179                 ret = drv_config(local, changed);
 180                 /*
 181                  * Goal:
 182                  * HW reconfiguration should never fail, the driver has told
 183                  * us what it can support so it should live up to that promise.
 184                  *
 185                  * Current status:
 186                  * rfkill is not integrated with mac80211 and a
 187                  * configuration command can thus fail if hardware rfkill
 188                  * is enabled
 189                  *
 190                  * FIXME: integrate rfkill with mac80211 and then add this
 191                  * WARN_ON() back
 192                  *
 193                  */
 194                 /* WARN_ON(ret); */
 195         }
 196
 197         return ret;
 198 }
 199
 200 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
 201                                       u32 changed)
 202 {
 203         struct ieee80211_local *local = sdata->local;
 204
 205         if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
 206                 return;
 207
 208         drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
 209 }
 210
 211 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
 212 {
 213         sdata->vif.bss_conf.use_cts_prot = false;
 214         sdata->vif.bss_conf.use_short_preamble = false;
 215         sdata->vif.bss_conf.use_short_slot = false;
 216         return BSS_CHANGED_ERP_CTS_PROT |
 217                BSS_CHANGED_ERP_PREAMBLE |
 218                BSS_CHANGED_ERP_SLOT;
 219 }
 220
 221 static void ieee80211_tasklet_handler(unsigned long data)
 222 {
 223         struct ieee80211_local *local = (struct ieee80211_local *) data;
 224         struct sk_buff *skb;
 225
 226         while ((skb = skb_dequeue(&local->skb_queue)) ||
 227                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
 228                 switch (skb->pkt_type) {
 229                 case IEEE80211_RX_MSG:
 230                         /* Clear skb->pkt_type in order to not confuse kernel
 231                          * netstack. */
 232                         skb->pkt_type = 0;
 233                         ieee80211_rx(&local->hw, skb);
 234                         break;
 235                 case IEEE80211_TX_STATUS_MSG:
 236                         skb->pkt_type = 0;
 237                         ieee80211_tx_status(&local->hw, skb);
 238                         break;
 239                 default:
 240                         WARN(1, "mac80211: Packet is of unknown type %d\n",
 241                              skb->pkt_type);
 242                         dev_kfree_skb(skb);
 243                         break;
 244                 }
 245         }
 246 }
 247
 248 static void ieee80211_restart_work(struct work_struct *work)
 249 {
 250         struct ieee80211_local *local =
 251                 container_of(work, struct ieee80211_local, restart_work);
 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         ieee80211_scan_cancel(local);
 261         ieee80211_reconfig(local);
 262         rtnl_unlock();
 263 }
 264
 265 void ieee80211_restart_hw(struct ieee80211_hw *hw)
 266 {
 267         struct ieee80211_local *local = hw_to_local(hw);
 268
 269         trace_api_restart_hw(local);
 270
 271         wiphy_info(hw->wiphy,
 272                    "Hardware restart was requested\n");
 273
 274         /* use this reason, ieee80211_reconfig will unblock it */
 275         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 276                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
 277                                         false);
 278
 279         /*
 280          * Stop all Rx during the reconfig. We don't want state changes
 281          * or driver callbacks while this is in progress.
 282          */
 283         local->in_reconfig = true;
 284         barrier();
 285
 286         schedule_work(&local->restart_work);
 287 }
 288 EXPORT_SYMBOL(ieee80211_restart_hw);
 289
 290 #ifdef CONFIG_INET
 291 static int ieee80211_ifa_changed(struct notifier_block *nb,
 292                                  unsigned long data, void *arg)
 293 {
 294         struct in_ifaddr *ifa = arg;
 295         struct ieee80211_local *local =
 296                 container_of(nb, struct ieee80211_local,
 297                              ifa_notifier);
 298         struct net_device *ndev = ifa->ifa_dev->dev;
 299         struct wireless_dev *wdev = ndev->ieee80211_ptr;
 300         struct in_device *idev;
 301         struct ieee80211_sub_if_data *sdata;
 302         struct ieee80211_bss_conf *bss_conf;
 303         struct ieee80211_if_managed *ifmgd;
 304         int c = 0;
 305
 306         /* Make sure it's our interface that got changed */
 307         if (!wdev)
 308                 return NOTIFY_DONE;
 309
 310         if (wdev->wiphy != local->hw.wiphy)
 311                 return NOTIFY_DONE;
 312
 313         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
 314         bss_conf = &sdata->vif.bss_conf;
 315
 316         /* ARP filtering is only supported in managed mode */
 317         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 318                 return NOTIFY_DONE;
 319
 320         idev = __in_dev_get_rtnl(sdata->dev);
 321         if (!idev)
 322                 return NOTIFY_DONE;
 323
 324         ifmgd = &sdata->u.mgd;
 325         sdata_lock(sdata);
 326
 327         /* Copy the addresses to the bss_conf list */
 328         ifa = idev->ifa_list;
 329         while (ifa) {
 330                 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
 331                         bss_conf->arp_addr_list[c] = ifa->ifa_address;
 332                 ifa = ifa->ifa_next;
 333                 c++;
 334         }
 335
 336         bss_conf->arp_addr_cnt = c;
 337
 338         /* Configure driver only if associated (which also implies it is up) */
 339         if (ifmgd->associated)
 340                 ieee80211_bss_info_change_notify(sdata,
 341                                                  BSS_CHANGED_ARP_FILTER);
 342
 343         sdata_unlock(sdata);
 344
 345         return NOTIFY_OK;
 346 }
 347 #endif
 348
 349 #if IS_ENABLED(CONFIG_IPV6)
 350 static int ieee80211_ifa6_changed(struct notifier_block *nb,
 351                                   unsigned long data, void *arg)
 352 {
 353         struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
 354         struct inet6_dev *idev = ifa->idev;
 355         struct net_device *ndev = ifa->idev->dev;
 356         struct ieee80211_local *local =
 357                 container_of(nb, struct ieee80211_local, ifa6_notifier);
 358         struct wireless_dev *wdev = ndev->ieee80211_ptr;
 359         struct ieee80211_sub_if_data *sdata;
 360
 361         /* Make sure it's our interface that got changed */
 362         if (!wdev || wdev->wiphy != local->hw.wiphy)
 363                 return NOTIFY_DONE;
 364
 365         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
 366
 367         /*
 368          * For now only support station mode. This is mostly because
 369          * doing AP would have to handle AP_VLAN in some way ...
 370          */
 371         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 372                 return NOTIFY_DONE;
 373
 374         drv_ipv6_addr_change(local, sdata, idev);
 375
 376         return NOTIFY_OK;
 377 }
 378 #endif
 379
 380 /* There isn't a lot of sense in it, but you can transmit anything you like */
 381 static const struct ieee80211_txrx_stypes
 382 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
 383         [NL80211_IFTYPE_ADHOC] = {
 384                 .tx = 0xffff,
 385                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 386                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 387                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 388                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 389         },
 390         [NL80211_IFTYPE_STATION] = {
 391                 .tx = 0xffff,
 392                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 393                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 394         },
 395         [NL80211_IFTYPE_AP] = {
 396                 .tx = 0xffff,
 397                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 398                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 399                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 400                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 401                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 402                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 403                         BIT(IEEE80211_STYPE_ACTION >> 4),
 404         },
 405         [NL80211_IFTYPE_AP_VLAN] = {
 406                 /* copy AP */
 407                 .tx = 0xffff,
 408                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 409                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 410                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 411                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 412                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 413                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 414                         BIT(IEEE80211_STYPE_ACTION >> 4),
 415         },
 416         [NL80211_IFTYPE_P2P_CLIENT] = {
 417                 .tx = 0xffff,
 418                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 419                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 420         },
 421         [NL80211_IFTYPE_P2P_GO] = {
 422                 .tx = 0xffff,
 423                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 424                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 425                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 426                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 427                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 428                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 429                         BIT(IEEE80211_STYPE_ACTION >> 4),
 430         },
 431         [NL80211_IFTYPE_MESH_POINT] = {
 432                 .tx = 0xffff,
 433                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 434                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 435                         BIT(IEEE80211_STYPE_DEAUTH >> 4),
 436         },
 437         [NL80211_IFTYPE_P2P_DEVICE] = {
 438                 .tx = 0xffff,
 439                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 440                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 441         },
 442 };
 443
 444 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
 445         .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
 446                              IEEE80211_HT_AMPDU_PARM_DENSITY,
 447
 448         .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
 449                                 IEEE80211_HT_CAP_MAX_AMSDU |
 450                                 IEEE80211_HT_CAP_SGI_20 |
 451                                 IEEE80211_HT_CAP_SGI_40 |
 452                                 IEEE80211_HT_CAP_LDPC_CODING |
 453                                 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
 454         .mcs = {
 455                 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
 456                              0xff, 0xff, 0xff, 0xff, 0xff, },
 457         },
 458 };
 459
 460 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
 461         .vht_cap_info =
 462                 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
 463                             IEEE80211_VHT_CAP_SHORT_GI_80 |
 464                             IEEE80211_VHT_CAP_SHORT_GI_160 |
 465                             IEEE80211_VHT_CAP_RXSTBC_1 |
 466                             IEEE80211_VHT_CAP_RXSTBC_2 |
 467                             IEEE80211_VHT_CAP_RXSTBC_3 |
 468                             IEEE80211_VHT_CAP_RXSTBC_4 |
 469                             IEEE80211_VHT_CAP_TXSTBC |
 470                             IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
 471                             IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
 472                             IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
 473                             IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
 474                             IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
 475         .supp_mcs = {
 476                 .rx_mcs_map = cpu_to_le16(~0),
 477                 .tx_mcs_map = cpu_to_le16(~0),
 478         },
 479 };
 480
 481 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
 482                                            const struct ieee80211_ops *ops,
 483                                            const char *requested_name)
 484 {
 485         struct ieee80211_local *local;
 486         int priv_size, i;
 487         struct wiphy *wiphy;
 488         bool use_chanctx;
 489
 490         if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
 491                     !ops->add_interface || !ops->remove_interface ||
 492                     !ops->configure_filter))
 493                 return NULL;
 494
 495         if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
 496                 return NULL;
 497
 498         /* check all or no channel context operations exist */
 499         i = !!ops->add_chanctx + !!ops->remove_chanctx +
 500             !!ops->change_chanctx + !!ops->assign_vif_chanctx +
 501             !!ops->unassign_vif_chanctx;
 502         if (WARN_ON(i != 0 && i != 5))
 503                 return NULL;
 504         use_chanctx = i == 5;
 505
 506         /* Ensure 32-byte alignment of our private data and hw private data.
 507          * We use the wiphy priv data for both our ieee80211_local and for
 508          * the driver's private data
 509          *
 510          * In memory it'll be like this:
 511          *
 512          * +-------------------------+
 513          * | struct wiphy           |
 514          * +-------------------------+
 515          * | struct ieee80211_local  |
 516          * +-------------------------+
 517          * | driver's private data   |
 518          * +-------------------------+
 519          *
 520          */
 521         priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
 522
 523         wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
 524
 525         if (!wiphy)
 526                 return NULL;
 527
 528         wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
 529
 530         wiphy->privid = mac80211_wiphy_privid;
 531
 532         wiphy->flags |= WIPHY_FLAG_NETNS_OK |
 533                         WIPHY_FLAG_4ADDR_AP |
 534                         WIPHY_FLAG_4ADDR_STATION |
 535                         WIPHY_FLAG_REPORTS_OBSS |
 536                         WIPHY_FLAG_OFFCHAN_TX;
 537
 538         if (ops->remain_on_channel)
 539                 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
 540
 541         wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
 542                            NL80211_FEATURE_SAE |
 543                            NL80211_FEATURE_HT_IBSS |
 544                            NL80211_FEATURE_VIF_TXPOWER |
 545                            NL80211_FEATURE_MAC_ON_CREATE |
 546                            NL80211_FEATURE_USERSPACE_MPM;
 547
 548         if (!ops->hw_scan)
 549                 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
 550                                    NL80211_FEATURE_AP_SCAN;
 551
 552
 553         if (!ops->set_key)
 554                 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 555
 556         wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
 557
 558         local = wiphy_priv(wiphy);
 559
 560         local->hw.wiphy = wiphy;
 561
 562         local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
 563
 564         local->ops = ops;
 565         local->use_chanctx = use_chanctx;
 566
 567         /* set up some defaults */
 568         local->hw.queues = 1;
 569         local->hw.max_rates = 1;
 570         local->hw.max_report_rates = 0;
 571         local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
 572         local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
 573         local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
 574         local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
 575         local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
 576         local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
 577                                          IEEE80211_RADIOTAP_MCS_HAVE_GI |
 578                                          IEEE80211_RADIOTAP_MCS_HAVE_BW;
 579         local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
 580                                          IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
 581         local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
 582         local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
 583         local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
 584         wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
 585         wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
 586
 587         local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
 588
 589         wiphy->extended_capabilities = local->ext_capa;
 590         wiphy->extended_capabilities_mask = local->ext_capa;
 591         wiphy->extended_capabilities_len =
 592                 ARRAY_SIZE(local->ext_capa);
 593
 594         INIT_LIST_HEAD(&local->interfaces);
 595
 596         __hw_addr_init(&local->mc_list);
 597
 598         mutex_init(&local->iflist_mtx);
 599         mutex_init(&local->mtx);
 600
 601         mutex_init(&local->key_mtx);
 602         spin_lock_init(&local->filter_lock);
 603         spin_lock_init(&local->rx_path_lock);
 604         spin_lock_init(&local->queue_stop_reason_lock);
 605
 606         INIT_LIST_HEAD(&local->chanctx_list);
 607         mutex_init(&local->chanctx_mtx);
 608
 609         INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
 610
 611         INIT_WORK(&local->restart_work, ieee80211_restart_work);
 612
 613         INIT_WORK(&local->radar_detected_work,
 614                   ieee80211_dfs_radar_detected_work);
 615
 616         INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
 617         local->smps_mode = IEEE80211_SMPS_OFF;
 618
 619         INIT_WORK(&local->dynamic_ps_enable_work,
 620                   ieee80211_dynamic_ps_enable_work);
 621         INIT_WORK(&local->dynamic_ps_disable_work,
 622                   ieee80211_dynamic_ps_disable_work);
 623         setup_timer(&local->dynamic_ps_timer,
 624                     ieee80211_dynamic_ps_timer, (unsigned long) local);
 625
 626         INIT_WORK(&local->sched_scan_stopped_work,
 627                   ieee80211_sched_scan_stopped_work);
 628
 629         spin_lock_init(&local->ack_status_lock);
 630         idr_init(&local->ack_status_frames);
 631
 632         sta_info_init(local);
 633
 634         for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
 635                 skb_queue_head_init(&local->pending[i]);
 636                 atomic_set(&local->agg_queue_stop[i], 0);
 637         }
 638         tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
 639                      (unsigned long)local);
 640
 641         tasklet_init(&local->tasklet,
 642                      ieee80211_tasklet_handler,
 643                      (unsigned long) local);
 644
 645         skb_queue_head_init(&local->skb_queue);
 646         skb_queue_head_init(&local->skb_queue_unreliable);
 647
 648         ieee80211_led_names(local);
 649
 650         ieee80211_roc_setup(local);
 651
 652         return &local->hw;
 653 }
 654 EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
 655
 656 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
 657 {
 658         bool have_wep = !(IS_ERR(local->wep_tx_tfm) ||
 659                           IS_ERR(local->wep_rx_tfm));
 660         bool have_mfp = local->hw.flags & IEEE80211_HW_MFP_CAPABLE;
 661         const struct ieee80211_cipher_scheme *cs = local->hw.cipher_schemes;
 662         int n_suites = 0, r = 0, w = 0;
 663         u32 *suites;
 664         static const u32 cipher_suites[] = {
 665                 /* keep WEP first, it may be removed below */
 666                 WLAN_CIPHER_SUITE_WEP40,
 667                 WLAN_CIPHER_SUITE_WEP104,
 668                 WLAN_CIPHER_SUITE_TKIP,
 669                 WLAN_CIPHER_SUITE_CCMP,
 670
 671                 /* keep last -- depends on hw flags! */
 672                 WLAN_CIPHER_SUITE_AES_CMAC
 673         };
 674
 675         /* Driver specifies the ciphers, we have nothing to do... */
 676         if (local->hw.wiphy->cipher_suites && have_wep)
 677                 return 0;
 678
 679         /* Set up cipher suites if driver relies on mac80211 cipher defs */
 680         if (!local->hw.wiphy->cipher_suites && !cs) {
 681                 local->hw.wiphy->cipher_suites = cipher_suites;
 682                 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
 683
 684                 if (!have_mfp)
 685                         local->hw.wiphy->n_cipher_suites--;
 686
 687                 if (!have_wep) {
 688                         local->hw.wiphy->cipher_suites += 2;
 689                         local->hw.wiphy->n_cipher_suites -= 2;
 690                 }
 691
 692                 return 0;
 693         }
 694
 695         if (!local->hw.wiphy->cipher_suites) {
 696                 /*
 697                  * Driver specifies cipher schemes only
 698                  * We start counting ciphers defined by schemes, TKIP and CCMP
 699                  */
 700                 n_suites = local->hw.n_cipher_schemes + 2;
 701
 702                 /* check if we have WEP40 and WEP104 */
 703                 if (have_wep)
 704                         n_suites += 2;
 705
 706                 /* check if we have AES_CMAC */
 707                 if (have_mfp)
 708                         n_suites++;
 709
 710                 suites = kmalloc(sizeof(u32) * n_suites, GFP_KERNEL);
 711                 if (!suites)
 712                         return -ENOMEM;
 713
 714                 suites[w++] = WLAN_CIPHER_SUITE_CCMP;
 715                 suites[w++] = WLAN_CIPHER_SUITE_TKIP;
 716
 717                 if (have_wep) {
 718                         suites[w++] = WLAN_CIPHER_SUITE_WEP40;
 719                         suites[w++] = WLAN_CIPHER_SUITE_WEP104;
 720                 }
 721
 722                 if (have_mfp)
 723                         suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC;
 724
 725                 for (r = 0; r < local->hw.n_cipher_schemes; r++)
 726                         suites[w++] = cs[r].cipher;
 727         } else {
 728                 /* Driver provides cipher suites, but we need to exclude WEP */
 729                 suites = kmemdup(local->hw.wiphy->cipher_suites,
 730                                  sizeof(u32) * local->hw.wiphy->n_cipher_suites,
 731                                  GFP_KERNEL);
 732                 if (!suites)
 733                         return -ENOMEM;
 734
 735                 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
 736                         u32 suite = local->hw.wiphy->cipher_suites[r];
 737
 738                         if (suite == WLAN_CIPHER_SUITE_WEP40 ||
 739                             suite == WLAN_CIPHER_SUITE_WEP104)
 740                                 continue;
 741                         suites[w++] = suite;
 742                 }
 743         }
 744
 745         local->hw.wiphy->cipher_suites = suites;
 746         local->hw.wiphy->n_cipher_suites = w;
 747         local->wiphy_ciphers_allocated = true;
 748
 749         return 0;
 750 }
 751
 752 int ieee80211_register_hw(struct ieee80211_hw *hw)
 753 {
 754         struct ieee80211_local *local = hw_to_local(hw);
 755         int result, i;
 756         enum ieee80211_band band;
 757         int channels, max_bitrates;
 758         bool supp_ht, supp_vht;
 759         netdev_features_t feature_whitelist;
 760         struct cfg80211_chan_def dflt_chandef = {};
 761
 762         if (hw->flags & IEEE80211_HW_QUEUE_CONTROL &&
 763             (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
 764              local->hw.offchannel_tx_hw_queue >= local->hw.queues))
 765                 return -EINVAL;
 766
 767         if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
 768             (!local->ops->tdls_channel_switch ||
 769              !local->ops->tdls_cancel_channel_switch ||
 770              !local->ops->tdls_recv_channel_switch))
 771                 return -EOPNOTSUPP;
 772
 773 #ifdef CONFIG_PM
 774         if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
 775                 return -EINVAL;
 776 #endif
 777
 778         if (!local->use_chanctx) {
 779                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
 780                         const struct ieee80211_iface_combination *comb;
 781
 782                         comb = &local->hw.wiphy->iface_combinations[i];
 783
 784                         if (comb->num_different_channels > 1)
 785                                 return -EINVAL;
 786                 }
 787         } else {
 788                 /*
 789                  * WDS is currently prohibited when channel contexts are used
 790                  * because there's no clear definition of which channel WDS
 791                  * type interfaces use
 792                  */
 793                 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
 794                         return -EINVAL;
 795
 796                 /* DFS is not supported with multi-channel combinations yet */
 797                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
 798                         const struct ieee80211_iface_combination *comb;
 799
 800                         comb = &local->hw.wiphy->iface_combinations[i];
 801
 802                         if (comb->radar_detect_widths &&
 803                             comb->num_different_channels > 1)
 804                                 return -EINVAL;
 805                 }
 806         }
 807
 808         /* Only HW csum features are currently compatible with mac80211 */
 809         feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
 810                             NETIF_F_HW_CSUM;
 811         if (WARN_ON(hw->netdev_features & ~feature_whitelist))
 812                 return -EINVAL;
 813
 814         if (hw->max_report_rates == 0)
 815                 hw->max_report_rates = hw->max_rates;
 816
 817         local->rx_chains = 1;
 818
 819         /*
 820          * generic code guarantees at least one band,
 821          * set this very early because much code assumes
 822          * that hw.conf.channel is assigned
 823          */
 824         channels = 0;
 825         max_bitrates = 0;
 826         supp_ht = false;
 827         supp_vht = false;
 828         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 829                 struct ieee80211_supported_band *sband;
 830
 831                 sband = local->hw.wiphy->bands[band];
 832                 if (!sband)
 833                         continue;
 834
 835                 if (!dflt_chandef.chan) {
 836                         cfg80211_chandef_create(&dflt_chandef,
 837                                                 &sband->channels[0],
 838                                                 NL80211_CHAN_NO_HT);
 839                         /* init channel we're on */
 840                         if (!local->use_chanctx && !local->_oper_chandef.chan) {
 841                                 local->hw.conf.chandef = dflt_chandef;
 842                                 local->_oper_chandef = dflt_chandef;
 843                         }
 844                         local->monitor_chandef = dflt_chandef;
 845                 }
 846
 847                 channels += sband->n_channels;
 848
 849                 if (max_bitrates < sband->n_bitrates)
 850                         max_bitrates = sband->n_bitrates;
 851                 supp_ht = supp_ht || sband->ht_cap.ht_supported;
 852                 supp_vht = supp_vht || sband->vht_cap.vht_supported;
 853
 854                 if (sband->ht_cap.ht_supported)
 855                         local->rx_chains =
 856                                 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
 857                                     local->rx_chains);
 858
 859                 /* TODO: consider VHT for RX chains, hopefully it's the same */
 860         }
 861
 862         /* if low-level driver supports AP, we also support VLAN */
 863         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
 864                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
 865                 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
 866         }
 867
 868         /* mac80211 always supports monitor */
 869         hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
 870         hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
 871
 872         /* mac80211 doesn't support more than one IBSS interface right now */
 873         for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
 874                 const struct ieee80211_iface_combination *c;
 875                 int j;
 876
 877                 c = &hw->wiphy->iface_combinations[i];
 878
 879                 for (j = 0; j < c->n_limits; j++)
 880                         if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
 881                             c->limits[j].max > 1)
 882                                 return -EINVAL;
 883         }
 884
 885         local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
 886                                       sizeof(void *) * channels, GFP_KERNEL);
 887         if (!local->int_scan_req)
 888                 return -ENOMEM;
 889
 890         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 891                 if (!local->hw.wiphy->bands[band])
 892                         continue;
 893                 local->int_scan_req->rates[band] = (u32) -1;
 894         }
 895
 896 #ifndef CONFIG_MAC80211_MESH
 897         /* mesh depends on Kconfig, but drivers should set it if they want */
 898         local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
 899 #endif
 900
 901         /* if the underlying driver supports mesh, mac80211 will (at least)
 902          * provide routing of mesh authentication frames to userspace */
 903         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
 904                 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
 905
 906         /* mac80211 supports control port protocol changing */
 907         local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
 908
 909         if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) {
 910                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
 911         } else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC) {
 912                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
 913                 if (hw->max_signal <= 0) {
 914                         result = -EINVAL;
 915                         goto fail_wiphy_register;
 916                 }
 917         }
 918
 919         WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)
 920              && (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK),
 921              "U-APSD not supported with HW_PS_NULLFUNC_STACK\n");
 922
 923         /*
 924          * Calculate scan IE length -- we need this to alloc
 925          * memory and to subtract from the driver limit. It
 926          * includes the DS Params, (extended) supported rates, and HT
 927          * information -- SSID is the driver's responsibility.
 928          */
 929         local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
 930                 3 /* DS Params */;
 931         if (supp_ht)
 932                 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
 933
 934         if (supp_vht)
 935                 local->scan_ies_len +=
 936                         2 + sizeof(struct ieee80211_vht_cap);
 937
 938         if (!local->ops->hw_scan) {
 939                 /* For hw_scan, driver needs to set these up. */
 940                 local->hw.wiphy->max_scan_ssids = 4;
 941                 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
 942         }
 943
 944         /*
 945          * If the driver supports any scan IEs, then assume the
 946          * limit includes the IEs mac80211 will add, otherwise
 947          * leave it at zero and let the driver sort it out; we
 948          * still pass our IEs to the driver but userspace will
 949          * not be allowed to in that case.
 950          */
 951         if (local->hw.wiphy->max_scan_ie_len)
 952                 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
 953
 954         WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes,
 955                                          local->hw.n_cipher_schemes));
 956
 957         result = ieee80211_init_cipher_suites(local);
 958         if (result < 0)
 959                 goto fail_wiphy_register;
 960
 961         if (!local->ops->remain_on_channel)
 962                 local->hw.wiphy->max_remain_on_channel_duration = 5000;
 963
 964         /* mac80211 based drivers don't support internal TDLS setup */
 965         if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
 966                 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
 967
 968         /* mac80211 supports eCSA, if the driver supports STA CSA at all */
 969         if (local->hw.flags & IEEE80211_HW_CHANCTX_STA_CSA)
 970                 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
 971
 972         local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM;
 973
 974         result = wiphy_register(local->hw.wiphy);
 975         if (result < 0)
 976                 goto fail_wiphy_register;
 977
 978         /*
 979          * We use the number of queues for feature tests (QoS, HT) internally
 980          * so restrict them appropriately.
 981          */
 982         if (hw->queues > IEEE80211_MAX_QUEUES)
 983                 hw->queues = IEEE80211_MAX_QUEUES;
 984
 985         local->workqueue =
 986                 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
 987         if (!local->workqueue) {
 988                 result = -ENOMEM;
 989                 goto fail_workqueue;
 990         }
 991
 992         /*
 993          * The hardware needs headroom for sending the frame,
 994          * and we need some headroom for passing the frame to monitor
 995          * interfaces, but never both at the same time.
 996          */
 997         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
 998                                    IEEE80211_TX_STATUS_HEADROOM);
 999
1000         debugfs_hw_add(local);
1001
1002         /*
1003          * if the driver doesn't specify a max listen interval we
1004          * use 5 which should be a safe default
1005          */
1006         if (local->hw.max_listen_interval == 0)
1007                 local->hw.max_listen_interval = 5;
1008
1009         local->hw.conf.listen_interval = local->hw.max_listen_interval;
1010
1011         local->dynamic_ps_forced_timeout = -1;
1012
1013         result = ieee80211_wep_init(local);
1014         if (result < 0)
1015                 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
1016                             result);
1017
1018         local->hw.conf.flags = IEEE80211_CONF_IDLE;
1019
1020         ieee80211_led_init(local);
1021
1022         rtnl_lock();
1023
1024         result = ieee80211_init_rate_ctrl_alg(local,
1025                                               hw->rate_control_algorithm);
1026         if (result < 0) {
1027                 wiphy_debug(local->hw.wiphy,
1028                             "Failed to initialize rate control algorithm\n");
1029                 goto fail_rate;
1030         }
1031
1032         /* add one default STA interface if supported */
1033         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1034             !(hw->flags & IEEE80211_HW_NO_AUTO_VIF)) {
1035                 result = ieee80211_if_add(local, "wlan%d", NULL,
1036                                           NL80211_IFTYPE_STATION, NULL);
1037                 if (result)
1038                         wiphy_warn(local->hw.wiphy,
1039                                    "Failed to add default virtual iface\n");
1040         }
1041
1042         rtnl_unlock();
1043
1044         local->network_latency_notifier.notifier_call =
1045                 ieee80211_max_network_latency;
1046         result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY,
1047                                      &local->network_latency_notifier);
1048         if (result) {
1049                 rtnl_lock();
1050                 goto fail_pm_qos;
1051         }
1052
1053 #ifdef CONFIG_INET
1054         local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1055         result = register_inetaddr_notifier(&local->ifa_notifier);
1056         if (result)
1057                 goto fail_ifa;
1058 #endif
1059
1060 #if IS_ENABLED(CONFIG_IPV6)
1061         local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1062         result = register_inet6addr_notifier(&local->ifa6_notifier);
1063         if (result)
1064                 goto fail_ifa6;
1065 #endif
1066
1067         return 0;
1068
1069 #if IS_ENABLED(CONFIG_IPV6)
1070  fail_ifa6:
1071 #ifdef CONFIG_INET
1072         unregister_inetaddr_notifier(&local->ifa_notifier);
1073 #endif
1074 #endif
1075 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1076  fail_ifa:
1077         pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1078                                &local->network_latency_notifier);
1079         rtnl_lock();
1080 #endif
1081  fail_pm_qos:
1082         ieee80211_led_exit(local);
1083         ieee80211_remove_interfaces(local);
1084  fail_rate:
1085         rtnl_unlock();
1086         ieee80211_wep_free(local);
1087         sta_info_stop(local);
1088         destroy_workqueue(local->workqueue);
1089  fail_workqueue:
1090         wiphy_unregister(local->hw.wiphy);
1091  fail_wiphy_register:
1092         if (local->wiphy_ciphers_allocated)
1093                 kfree(local->hw.wiphy->cipher_suites);
1094         kfree(local->int_scan_req);
1095         return result;
1096 }
1097 EXPORT_SYMBOL(ieee80211_register_hw);
1098
1099 void ieee80211_napi_add(struct ieee80211_hw *hw, struct napi_struct *napi,
1100                         struct net_device *napi_dev,
1101                         int (*poll)(struct napi_struct *, int),
1102                         int weight)
1103 {
1104         struct ieee80211_local *local = hw_to_local(hw);
1105
1106         netif_napi_add(napi_dev, napi, poll, weight);
1107         local->napi = napi;
1108 }
1109 EXPORT_SYMBOL_GPL(ieee80211_napi_add);
1110
1111 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1112 {
1113         struct ieee80211_local *local = hw_to_local(hw);
1114
1115         tasklet_kill(&local->tx_pending_tasklet);
1116         tasklet_kill(&local->tasklet);
1117
1118         pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1119                                &local->network_latency_notifier);
1120 #ifdef CONFIG_INET
1121         unregister_inetaddr_notifier(&local->ifa_notifier);
1122 #endif
1123 #if IS_ENABLED(CONFIG_IPV6)
1124         unregister_inet6addr_notifier(&local->ifa6_notifier);
1125 #endif
1126
1127         rtnl_lock();
1128
1129         /*
1130          * At this point, interface list manipulations are fine
1131          * because the driver cannot be handing us frames any
1132          * more and the tasklet is killed.
1133          */
1134         ieee80211_remove_interfaces(local);
1135
1136         rtnl_unlock();
1137
1138         cancel_work_sync(&local->restart_work);
1139         cancel_work_sync(&local->reconfig_filter);
1140         flush_work(&local->sched_scan_stopped_work);
1141
1142         ieee80211_clear_tx_pending(local);
1143         rate_control_deinitialize(local);
1144
1145         if (skb_queue_len(&local->skb_queue) ||
1146             skb_queue_len(&local->skb_queue_unreliable))
1147                 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1148         skb_queue_purge(&local->skb_queue);
1149         skb_queue_purge(&local->skb_queue_unreliable);
1150
1151         destroy_workqueue(local->workqueue);
1152         wiphy_unregister(local->hw.wiphy);
1153         sta_info_stop(local);
1154         ieee80211_wep_free(local);
1155         ieee80211_led_exit(local);
1156         kfree(local->int_scan_req);
1157 }
1158 EXPORT_SYMBOL(ieee80211_unregister_hw);
1159
1160 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1161 {
1162         WARN_ONCE(1, "Have pending ack frames!\n");
1163         kfree_skb(p);
1164         return 0;
1165 }
1166
1167 void ieee80211_free_hw(struct ieee80211_hw *hw)
1168 {
1169         struct ieee80211_local *local = hw_to_local(hw);
1170
1171         mutex_destroy(&local->iflist_mtx);
1172         mutex_destroy(&local->mtx);
1173
1174         if (local->wiphy_ciphers_allocated)
1175                 kfree(local->hw.wiphy->cipher_suites);
1176
1177         idr_for_each(&local->ack_status_frames,
1178                      ieee80211_free_ack_frame, NULL);
1179         idr_destroy(&local->ack_status_frames);
1180
1181         kfree(rcu_access_pointer(local->tx_latency));
1182
1183         wiphy_free(local->hw.wiphy);
1184 }
1185 EXPORT_SYMBOL(ieee80211_free_hw);
1186
1187 static int __init ieee80211_init(void)
1188 {
1189         struct sk_buff *skb;
1190         int ret;
1191
1192         BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1193         BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1194                      IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1195
1196         ret = rc80211_minstrel_init();
1197         if (ret)
1198                 return ret;
1199
1200         ret = rc80211_minstrel_ht_init();
1201         if (ret)
1202                 goto err_minstrel;
1203
1204         ret = ieee80211_iface_init();
1205         if (ret)
1206                 goto err_netdev;
1207
1208         return 0;
1209  err_netdev:
1210         rc80211_minstrel_ht_exit();
1211  err_minstrel:
1212         rc80211_minstrel_exit();
1213
1214         return ret;
1215 }
1216
1217 static void __exit ieee80211_exit(void)
1218 {
1219         rc80211_minstrel_ht_exit();
1220         rc80211_minstrel_exit();
1221
1222         ieee80211s_stop();
1223
1224         ieee80211_iface_exit();
1225
1226         rcu_barrier();
1227 }
1228
1229
1230 subsys_initcall(ieee80211_init);
1231 module_exit(ieee80211_exit);
1232
1233 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1234 MODULE_LICENSE("GPL");