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/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 "debugfs.h"
  35
  36 void ieee80211_configure_filter(struct ieee80211_local *local)
  37 {
  38         u64 mc;
  39         unsigned int changed_flags;
  40         unsigned int new_flags = 0;
  41
  42         if (atomic_read(&local->iff_allmultis))
  43                 new_flags |= FIF_ALLMULTI;
  44
  45         if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) ||
  46             test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning))
  47                 new_flags |= FIF_BCN_PRBRESP_PROMISC;
  48
  49         if (local->fif_probe_req || local->probe_req_reg)
  50                 new_flags |= FIF_PROBE_REQ;
  51
  52         if (local->fif_fcsfail)
  53                 new_flags |= FIF_FCSFAIL;
  54
  55         if (local->fif_plcpfail)
  56                 new_flags |= FIF_PLCPFAIL;
  57
  58         if (local->fif_control)
  59                 new_flags |= FIF_CONTROL;
  60
  61         if (local->fif_other_bss)
  62                 new_flags |= FIF_OTHER_BSS;
  63
  64         if (local->fif_pspoll)
  65                 new_flags |= FIF_PSPOLL;
  66
  67         spin_lock_bh(&local->filter_lock);
  68         changed_flags = local->filter_flags ^ new_flags;
  69
  70         mc = drv_prepare_multicast(local, &local->mc_list);
  71         spin_unlock_bh(&local->filter_lock);
  72
  73         /* be a bit nasty */
  74         new_flags |= (1<<31);
  75
  76         drv_configure_filter(local, changed_flags, &new_flags, mc);
  77
  78         WARN_ON(new_flags & (1<<31));
  79
  80         local->filter_flags = new_flags & ~(1<<31);
  81 }
  82
  83 static void ieee80211_reconfig_filter(struct work_struct *work)
  84 {
  85         struct ieee80211_local *local =
  86                 container_of(work, struct ieee80211_local, reconfig_filter);
  87
  88         ieee80211_configure_filter(local);
  89 }
  90
  91 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
  92 {
  93         struct ieee80211_sub_if_data *sdata;
  94         struct cfg80211_chan_def chandef = {};
  95         u32 changed = 0;
  96         int power;
  97         u32 offchannel_flag;
  98
  99         offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
 100
 101         if (local->scan_chandef.chan) {
 102                 chandef = local->scan_chandef;
 103         } else if (local->tmp_channel) {
 104                 chandef.chan = local->tmp_channel;
 105                 chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
 106                 chandef.center_freq1 = chandef.chan->center_freq;
 107         } else
 108                 chandef = local->_oper_chandef;
 109
 110         WARN(!cfg80211_chandef_valid(&chandef),
 111              "control:%d MHz width:%d center: %d/%d MHz",
 112              chandef.chan->center_freq, chandef.width,
 113              chandef.center_freq1, chandef.center_freq2);
 114
 115         if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef))
 116                 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
 117         else
 118                 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
 119
 120         offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
 121
 122         if (offchannel_flag ||
 123             !cfg80211_chandef_identical(&local->hw.conf.chandef,
 124                                         &local->_oper_chandef)) {
 125                 local->hw.conf.chandef = chandef;
 126                 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
 127         }
 128
 129         if (!conf_is_ht(&local->hw.conf)) {
 130                 /*
 131                  * mac80211.h documents that this is only valid
 132                  * when the channel is set to an HT type, and
 133                  * that otherwise STATIC is used.
 134                  */
 135                 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
 136         } else if (local->hw.conf.smps_mode != local->smps_mode) {
 137                 local->hw.conf.smps_mode = local->smps_mode;
 138                 changed |= IEEE80211_CONF_CHANGE_SMPS;
 139         }
 140
 141         power = ieee80211_chandef_max_power(&chandef);
 142
 143         rcu_read_lock();
 144         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 145                 if (!rcu_access_pointer(sdata->vif.chanctx_conf))
 146                         continue;
 147                 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
 148                         continue;
 149                 power = min(power, sdata->vif.bss_conf.txpower);
 150         }
 151         rcu_read_unlock();
 152
 153         if (local->hw.conf.power_level != power) {
 154                 changed |= IEEE80211_CONF_CHANGE_POWER;
 155                 local->hw.conf.power_level = power;
 156         }
 157
 158         return changed;
 159 }
 160
 161 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
 162 {
 163         int ret = 0;
 164
 165         might_sleep();
 166
 167         if (!local->use_chanctx)
 168                 changed |= ieee80211_hw_conf_chan(local);
 169         else
 170                 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
 171                              IEEE80211_CONF_CHANGE_POWER);
 172
 173         if (changed && local->open_count) {
 174                 ret = drv_config(local, changed);
 175                 /*
 176                  * Goal:
 177                  * HW reconfiguration should never fail, the driver has told
 178                  * us what it can support so it should live up to that promise.
 179                  *
 180                  * Current status:
 181                  * rfkill is not integrated with mac80211 and a
 182                  * configuration command can thus fail if hardware rfkill
 183                  * is enabled
 184                  *
 185                  * FIXME: integrate rfkill with mac80211 and then add this
 186                  * WARN_ON() back
 187                  *
 188                  */
 189                 /* WARN_ON(ret); */
 190         }
 191
 192         return ret;
 193 }
 194
 195 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
 196                                       u32 changed)
 197 {
 198         struct ieee80211_local *local = sdata->local;
 199
 200         if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
 201                 return;
 202
 203         drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
 204 }
 205
 206 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
 207 {
 208         sdata->vif.bss_conf.use_cts_prot = false;
 209         sdata->vif.bss_conf.use_short_preamble = false;
 210         sdata->vif.bss_conf.use_short_slot = false;
 211         return BSS_CHANGED_ERP_CTS_PROT |
 212                BSS_CHANGED_ERP_PREAMBLE |
 213                BSS_CHANGED_ERP_SLOT;
 214 }
 215
 216 static void ieee80211_tasklet_handler(unsigned long data)
 217 {
 218         struct ieee80211_local *local = (struct ieee80211_local *) data;
 219         struct sk_buff *skb;
 220
 221         while ((skb = skb_dequeue(&local->skb_queue)) ||
 222                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
 223                 switch (skb->pkt_type) {
 224                 case IEEE80211_RX_MSG:
 225                         /* Clear skb->pkt_type in order to not confuse kernel
 226                          * netstack. */
 227                         skb->pkt_type = 0;
 228                         ieee80211_rx(&local->hw, skb);
 229                         break;
 230                 case IEEE80211_TX_STATUS_MSG:
 231                         skb->pkt_type = 0;
 232                         ieee80211_tx_status(&local->hw, skb);
 233                         break;
 234                 default:
 235                         WARN(1, "mac80211: Packet is of unknown type %d\n",
 236                              skb->pkt_type);
 237                         dev_kfree_skb(skb);
 238                         break;
 239                 }
 240         }
 241 }
 242
 243 static void ieee80211_restart_work(struct work_struct *work)
 244 {
 245         struct ieee80211_local *local =
 246                 container_of(work, struct ieee80211_local, restart_work);
 247         struct ieee80211_sub_if_data *sdata;
 248
 249         /* wait for scan work complete */
 250         flush_workqueue(local->workqueue);
 251         flush_work(&local->sched_scan_stopped_work);
 252
 253         WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
 254              "%s called with hardware scan in progress\n", __func__);
 255
 256         flush_work(&local->radar_detected_work);
 257         rtnl_lock();
 258         list_for_each_entry(sdata, &local->interfaces, list)
 259                 flush_delayed_work(&sdata->dec_tailroom_needed_wk);
 260         ieee80211_scan_cancel(local);
 261
 262         /* make sure any new ROC will consider local->in_reconfig */
 263         flush_delayed_work(&local->roc_work);
 264         flush_work(&local->hw_roc_done);
 265
 266         /* wait for all packet processing to be done */
 267         synchronize_net();
 268
 269         ieee80211_reconfig(local);
 270         rtnl_unlock();
 271 }
 272
 273 void ieee80211_restart_hw(struct ieee80211_hw *hw)
 274 {
 275         struct ieee80211_local *local = hw_to_local(hw);
 276
 277         trace_api_restart_hw(local);
 278
 279         wiphy_info(hw->wiphy,
 280                    "Hardware restart was requested\n");
 281
 282         /* use this reason, ieee80211_reconfig will unblock it */
 283         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 284                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
 285                                         false);
 286
 287         /*
 288          * Stop all Rx during the reconfig. We don't want state changes
 289          * or driver callbacks while this is in progress.
 290          */
 291         local->in_reconfig = true;
 292         barrier();
 293
 294         queue_work(system_freezable_wq, &local->restart_work);
 295 }
 296 EXPORT_SYMBOL(ieee80211_restart_hw);
 297
 298 #ifdef CONFIG_INET
 299 static int ieee80211_ifa_changed(struct notifier_block *nb,
 300                                  unsigned long data, void *arg)
 301 {
 302         struct in_ifaddr *ifa = arg;
 303         struct ieee80211_local *local =
 304                 container_of(nb, struct ieee80211_local,
 305                              ifa_notifier);
 306         struct net_device *ndev = ifa->ifa_dev->dev;
 307         struct wireless_dev *wdev = ndev->ieee80211_ptr;
 308         struct in_device *idev;
 309         struct ieee80211_sub_if_data *sdata;
 310         struct ieee80211_bss_conf *bss_conf;
 311         struct ieee80211_if_managed *ifmgd;
 312         int c = 0;
 313
 314         /* Make sure it's our interface that got changed */
 315         if (!wdev)
 316                 return NOTIFY_DONE;
 317
 318         if (wdev->wiphy != local->hw.wiphy)
 319                 return NOTIFY_DONE;
 320
 321         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
 322         bss_conf = &sdata->vif.bss_conf;
 323
 324         /* ARP filtering is only supported in managed mode */
 325         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 326                 return NOTIFY_DONE;
 327
 328         idev = __in_dev_get_rtnl(sdata->dev);
 329         if (!idev)
 330                 return NOTIFY_DONE;
 331
 332         ifmgd = &sdata->u.mgd;
 333         sdata_lock(sdata);
 334
 335         /* Copy the addresses to the bss_conf list */
 336         ifa = idev->ifa_list;
 337         while (ifa) {
 338                 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
 339                         bss_conf->arp_addr_list[c] = ifa->ifa_address;
 340                 ifa = ifa->ifa_next;
 341                 c++;
 342         }
 343
 344         bss_conf->arp_addr_cnt = c;
 345
 346         /* Configure driver only if associated (which also implies it is up) */
 347         if (ifmgd->associated)
 348                 ieee80211_bss_info_change_notify(sdata,
 349                                                  BSS_CHANGED_ARP_FILTER);
 350
 351         sdata_unlock(sdata);
 352
 353         return NOTIFY_OK;
 354 }
 355 #endif
 356
 357 #if IS_ENABLED(CONFIG_IPV6)
 358 static int ieee80211_ifa6_changed(struct notifier_block *nb,
 359                                   unsigned long data, void *arg)
 360 {
 361         struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
 362         struct inet6_dev *idev = ifa->idev;
 363         struct net_device *ndev = ifa->idev->dev;
 364         struct ieee80211_local *local =
 365                 container_of(nb, struct ieee80211_local, ifa6_notifier);
 366         struct wireless_dev *wdev = ndev->ieee80211_ptr;
 367         struct ieee80211_sub_if_data *sdata;
 368
 369         /* Make sure it's our interface that got changed */
 370         if (!wdev || wdev->wiphy != local->hw.wiphy)
 371                 return NOTIFY_DONE;
 372
 373         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
 374
 375         /*
 376          * For now only support station mode. This is mostly because
 377          * doing AP would have to handle AP_VLAN in some way ...
 378          */
 379         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 380                 return NOTIFY_DONE;
 381
 382         drv_ipv6_addr_change(local, sdata, idev);
 383
 384         return NOTIFY_OK;
 385 }
 386 #endif
 387
 388 /* There isn't a lot of sense in it, but you can transmit anything you like */
 389 static const struct ieee80211_txrx_stypes
 390 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
 391         [NL80211_IFTYPE_ADHOC] = {
 392                 .tx = 0xffff,
 393                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 394                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 395                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 396                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 397         },
 398         [NL80211_IFTYPE_STATION] = {
 399                 .tx = 0xffff,
 400                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 401                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 402         },
 403         [NL80211_IFTYPE_AP] = {
 404                 .tx = 0xffff,
 405                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 406                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 407                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 408                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 409                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 410                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 411                         BIT(IEEE80211_STYPE_ACTION >> 4),
 412         },
 413         [NL80211_IFTYPE_AP_VLAN] = {
 414                 /* copy AP */
 415                 .tx = 0xffff,
 416                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 417                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 418                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 419                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 420                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 421                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 422                         BIT(IEEE80211_STYPE_ACTION >> 4),
 423         },
 424         [NL80211_IFTYPE_P2P_CLIENT] = {
 425                 .tx = 0xffff,
 426                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 427                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 428         },
 429         [NL80211_IFTYPE_P2P_GO] = {
 430                 .tx = 0xffff,
 431                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 432                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 433                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 434                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 435                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 436                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 437                         BIT(IEEE80211_STYPE_ACTION >> 4),
 438         },
 439         [NL80211_IFTYPE_MESH_POINT] = {
 440                 .tx = 0xffff,
 441                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 442                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 443                         BIT(IEEE80211_STYPE_DEAUTH >> 4),
 444         },
 445         [NL80211_IFTYPE_P2P_DEVICE] = {
 446                 .tx = 0xffff,
 447                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 448                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 449         },
 450 };
 451
 452 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
 453         .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
 454                              IEEE80211_HT_AMPDU_PARM_DENSITY,
 455
 456         .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
 457                                 IEEE80211_HT_CAP_MAX_AMSDU |
 458                                 IEEE80211_HT_CAP_SGI_20 |
 459                                 IEEE80211_HT_CAP_SGI_40 |
 460                                 IEEE80211_HT_CAP_LDPC_CODING |
 461                                 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
 462         .mcs = {
 463                 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
 464                              0xff, 0xff, 0xff, 0xff, 0xff, },
 465         },
 466 };
 467
 468 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
 469         .vht_cap_info =
 470                 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
 471                             IEEE80211_VHT_CAP_SHORT_GI_80 |
 472                             IEEE80211_VHT_CAP_SHORT_GI_160 |
 473                             IEEE80211_VHT_CAP_RXSTBC_1 |
 474                             IEEE80211_VHT_CAP_RXSTBC_2 |
 475                             IEEE80211_VHT_CAP_RXSTBC_3 |
 476                             IEEE80211_VHT_CAP_RXSTBC_4 |
 477                             IEEE80211_VHT_CAP_TXSTBC |
 478                             IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
 479                             IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
 480                             IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
 481                             IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
 482                             IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
 483         .supp_mcs = {
 484                 .rx_mcs_map = cpu_to_le16(~0),
 485                 .tx_mcs_map = cpu_to_le16(~0),
 486         },
 487 };
 488
 489 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
 490                                            const struct ieee80211_ops *ops,
 491                                            const char *requested_name)
 492 {
 493         struct ieee80211_local *local;
 494         int priv_size, i;
 495         struct wiphy *wiphy;
 496         bool use_chanctx;
 497
 498         if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
 499                     !ops->add_interface || !ops->remove_interface ||
 500                     !ops->configure_filter))
 501                 return NULL;
 502
 503         if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
 504                 return NULL;
 505
 506         /* check all or no channel context operations exist */
 507         i = !!ops->add_chanctx + !!ops->remove_chanctx +
 508             !!ops->change_chanctx + !!ops->assign_vif_chanctx +
 509             !!ops->unassign_vif_chanctx;
 510         if (WARN_ON(i != 0 && i != 5))
 511                 return NULL;
 512         use_chanctx = i == 5;
 513
 514         /* Ensure 32-byte alignment of our private data and hw private data.
 515          * We use the wiphy priv data for both our ieee80211_local and for
 516          * the driver's private data
 517          *
 518          * In memory it'll be like this:
 519          *
 520          * +-------------------------+
 521          * | struct wiphy           |
 522          * +-------------------------+
 523          * | struct ieee80211_local  |
 524          * +-------------------------+
 525          * | driver's private data   |
 526          * +-------------------------+
 527          *
 528          */
 529         priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
 530
 531         wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
 532
 533         if (!wiphy)
 534                 return NULL;
 535
 536         wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
 537
 538         wiphy->privid = mac80211_wiphy_privid;
 539
 540         wiphy->flags |= WIPHY_FLAG_NETNS_OK |
 541                         WIPHY_FLAG_4ADDR_AP |
 542                         WIPHY_FLAG_4ADDR_STATION |
 543                         WIPHY_FLAG_REPORTS_OBSS |
 544                         WIPHY_FLAG_OFFCHAN_TX;
 545
 546         if (ops->remain_on_channel)
 547                 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
 548
 549         wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
 550                            NL80211_FEATURE_SAE |
 551                            NL80211_FEATURE_HT_IBSS |
 552                            NL80211_FEATURE_VIF_TXPOWER |
 553                            NL80211_FEATURE_MAC_ON_CREATE |
 554                            NL80211_FEATURE_USERSPACE_MPM |
 555                            NL80211_FEATURE_FULL_AP_CLIENT_STATE;
 556         wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA);
 557
 558         if (!ops->hw_scan)
 559                 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
 560                                    NL80211_FEATURE_AP_SCAN;
 561
 562
 563         if (!ops->set_key)
 564                 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 565
 566         wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM);
 567
 568         wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
 569
 570         local = wiphy_priv(wiphy);
 571
 572         if (sta_info_init(local))
 573                 goto err_free;
 574
 575         local->hw.wiphy = wiphy;
 576
 577         local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
 578
 579         local->ops = ops;
 580         local->use_chanctx = use_chanctx;
 581
 582         /* set up some defaults */
 583         local->hw.queues = 1;
 584         local->hw.max_rates = 1;
 585         local->hw.max_report_rates = 0;
 586         local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
 587         local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
 588         local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
 589         local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
 590         local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
 591         local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
 592                                          IEEE80211_RADIOTAP_MCS_HAVE_GI |
 593                                          IEEE80211_RADIOTAP_MCS_HAVE_BW;
 594         local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
 595                                          IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
 596         local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
 597         local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
 598         local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
 599         wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
 600         wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
 601
 602         local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
 603
 604         wiphy->extended_capabilities = local->ext_capa;
 605         wiphy->extended_capabilities_mask = local->ext_capa;
 606         wiphy->extended_capabilities_len =
 607                 ARRAY_SIZE(local->ext_capa);
 608
 609         INIT_LIST_HEAD(&local->interfaces);
 610         INIT_LIST_HEAD(&local->mon_list);
 611
 612         __hw_addr_init(&local->mc_list);
 613
 614         mutex_init(&local->iflist_mtx);
 615         mutex_init(&local->mtx);
 616
 617         mutex_init(&local->key_mtx);
 618         spin_lock_init(&local->filter_lock);
 619         spin_lock_init(&local->rx_path_lock);
 620         spin_lock_init(&local->queue_stop_reason_lock);
 621
 622         INIT_LIST_HEAD(&local->chanctx_list);
 623         mutex_init(&local->chanctx_mtx);
 624
 625         INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
 626
 627         INIT_WORK(&local->restart_work, ieee80211_restart_work);
 628
 629         INIT_WORK(&local->radar_detected_work,
 630                   ieee80211_dfs_radar_detected_work);
 631
 632         INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
 633         local->smps_mode = IEEE80211_SMPS_OFF;
 634
 635         INIT_WORK(&local->dynamic_ps_enable_work,
 636                   ieee80211_dynamic_ps_enable_work);
 637         INIT_WORK(&local->dynamic_ps_disable_work,
 638                   ieee80211_dynamic_ps_disable_work);
 639         timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0);
 640
 641         INIT_WORK(&local->sched_scan_stopped_work,
 642                   ieee80211_sched_scan_stopped_work);
 643
 644         INIT_WORK(&local->tdls_chsw_work, ieee80211_tdls_chsw_work);
 645
 646         spin_lock_init(&local->ack_status_lock);
 647         idr_init(&local->ack_status_frames);
 648
 649         for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
 650                 skb_queue_head_init(&local->pending[i]);
 651                 atomic_set(&local->agg_queue_stop[i], 0);
 652         }
 653         tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
 654                      (unsigned long)local);
 655
 656         tasklet_init(&local->tasklet,
 657                      ieee80211_tasklet_handler,
 658                      (unsigned long) local);
 659
 660         skb_queue_head_init(&local->skb_queue);
 661         skb_queue_head_init(&local->skb_queue_unreliable);
 662         skb_queue_head_init(&local->skb_queue_tdls_chsw);
 663
 664         ieee80211_alloc_led_names(local);
 665
 666         ieee80211_roc_setup(local);
 667
 668         local->hw.radiotap_timestamp.units_pos = -1;
 669         local->hw.radiotap_timestamp.accuracy = -1;
 670
 671         return &local->hw;
 672  err_free:
 673         wiphy_free(wiphy);
 674         return NULL;
 675 }
 676 EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
 677
 678 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
 679 {
 680         bool have_wep = !(IS_ERR(local->wep_tx_tfm) ||
 681                           IS_ERR(local->wep_rx_tfm));
 682         bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE);
 683         int n_suites = 0, r = 0, w = 0;
 684         u32 *suites;
 685         static const u32 cipher_suites[] = {
 686                 /* keep WEP first, it may be removed below */
 687                 WLAN_CIPHER_SUITE_WEP40,
 688                 WLAN_CIPHER_SUITE_WEP104,
 689                 WLAN_CIPHER_SUITE_TKIP,
 690                 WLAN_CIPHER_SUITE_CCMP,
 691                 WLAN_CIPHER_SUITE_CCMP_256,
 692                 WLAN_CIPHER_SUITE_GCMP,
 693                 WLAN_CIPHER_SUITE_GCMP_256,
 694
 695                 /* keep last -- depends on hw flags! */
 696                 WLAN_CIPHER_SUITE_AES_CMAC,
 697                 WLAN_CIPHER_SUITE_BIP_CMAC_256,
 698                 WLAN_CIPHER_SUITE_BIP_GMAC_128,
 699                 WLAN_CIPHER_SUITE_BIP_GMAC_256,
 700         };
 701
 702         if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) ||
 703             local->hw.wiphy->cipher_suites) {
 704                 /* If the driver advertises, or doesn't support SW crypto,
 705                  * we only need to remove WEP if necessary.
 706                  */
 707                 if (have_wep)
 708                         return 0;
 709
 710                 /* well if it has _no_ ciphers ... fine */
 711                 if (!local->hw.wiphy->n_cipher_suites)
 712                         return 0;
 713
 714                 /* Driver provides cipher suites, but we need to exclude WEP */
 715                 suites = kmemdup(local->hw.wiphy->cipher_suites,
 716                                  sizeof(u32) * local->hw.wiphy->n_cipher_suites,
 717                                  GFP_KERNEL);
 718                 if (!suites)
 719                         return -ENOMEM;
 720
 721                 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
 722                         u32 suite = local->hw.wiphy->cipher_suites[r];
 723
 724                         if (suite == WLAN_CIPHER_SUITE_WEP40 ||
 725                             suite == WLAN_CIPHER_SUITE_WEP104)
 726                                 continue;
 727                         suites[w++] = suite;
 728                 }
 729         } else if (!local->hw.cipher_schemes) {
 730                 /* If the driver doesn't have cipher schemes, there's nothing
 731                  * else to do other than assign the (software supported and
 732                  * perhaps offloaded) cipher suites.
 733                  */
 734                 local->hw.wiphy->cipher_suites = cipher_suites;
 735                 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
 736
 737                 if (!have_mfp)
 738                         local->hw.wiphy->n_cipher_suites -= 4;
 739
 740                 if (!have_wep) {
 741                         local->hw.wiphy->cipher_suites += 2;
 742                         local->hw.wiphy->n_cipher_suites -= 2;
 743                 }
 744
 745                 /* not dynamically allocated, so just return */
 746                 return 0;
 747         } else {
 748                 const struct ieee80211_cipher_scheme *cs;
 749
 750                 cs = local->hw.cipher_schemes;
 751
 752                 /* Driver specifies cipher schemes only (but not cipher suites
 753                  * including the schemes)
 754                  *
 755                  * We start counting ciphers defined by schemes, TKIP, CCMP,
 756                  * CCMP-256, GCMP, and GCMP-256
 757                  */
 758                 n_suites = local->hw.n_cipher_schemes + 5;
 759
 760                 /* check if we have WEP40 and WEP104 */
 761                 if (have_wep)
 762                         n_suites += 2;
 763
 764                 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128,
 765                  * BIP-GMAC-256
 766                  */
 767                 if (have_mfp)
 768                         n_suites += 4;
 769
 770                 suites = kmalloc(sizeof(u32) * n_suites, GFP_KERNEL);
 771                 if (!suites)
 772                         return -ENOMEM;
 773
 774                 suites[w++] = WLAN_CIPHER_SUITE_CCMP;
 775                 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256;
 776                 suites[w++] = WLAN_CIPHER_SUITE_TKIP;
 777                 suites[w++] = WLAN_CIPHER_SUITE_GCMP;
 778                 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256;
 779
 780                 if (have_wep) {
 781                         suites[w++] = WLAN_CIPHER_SUITE_WEP40;
 782                         suites[w++] = WLAN_CIPHER_SUITE_WEP104;
 783                 }
 784
 785                 if (have_mfp) {
 786                         suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC;
 787                         suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256;
 788                         suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128;
 789                         suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256;
 790                 }
 791
 792                 for (r = 0; r < local->hw.n_cipher_schemes; r++) {
 793                         suites[w++] = cs[r].cipher;
 794                         if (WARN_ON(cs[r].pn_len > IEEE80211_MAX_PN_LEN)) {
 795                                 kfree(suites);
 796                                 return -EINVAL;
 797                         }
 798                 }
 799         }
 800
 801         local->hw.wiphy->cipher_suites = suites;
 802         local->hw.wiphy->n_cipher_suites = w;
 803         local->wiphy_ciphers_allocated = true;
 804
 805         return 0;
 806 }
 807
 808 int ieee80211_register_hw(struct ieee80211_hw *hw)
 809 {
 810         struct ieee80211_local *local = hw_to_local(hw);
 811         int result, i;
 812         enum nl80211_band band;
 813         int channels, max_bitrates;
 814         bool supp_ht, supp_vht;
 815         netdev_features_t feature_whitelist;
 816         struct cfg80211_chan_def dflt_chandef = {};
 817
 818         if (ieee80211_hw_check(hw, QUEUE_CONTROL) &&
 819             (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
 820              local->hw.offchannel_tx_hw_queue >= local->hw.queues))
 821                 return -EINVAL;
 822
 823         if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
 824             (!local->ops->tdls_channel_switch ||
 825              !local->ops->tdls_cancel_channel_switch ||
 826              !local->ops->tdls_recv_channel_switch))
 827                 return -EOPNOTSUPP;
 828
 829         if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) &&
 830                     !local->ops->set_frag_threshold))
 831                 return -EINVAL;
 832
 833         if (WARN_ON(local->hw.wiphy->interface_modes &
 834                         BIT(NL80211_IFTYPE_NAN) &&
 835                     (!local->ops->start_nan || !local->ops->stop_nan)))
 836                 return -EINVAL;
 837
 838 #ifdef CONFIG_PM
 839         if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
 840                 return -EINVAL;
 841 #endif
 842
 843         if (!local->use_chanctx) {
 844                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
 845                         const struct ieee80211_iface_combination *comb;
 846
 847                         comb = &local->hw.wiphy->iface_combinations[i];
 848
 849                         if (comb->num_different_channels > 1)
 850                                 return -EINVAL;
 851                 }
 852         } else {
 853                 /*
 854                  * WDS is currently prohibited when channel contexts are used
 855                  * because there's no clear definition of which channel WDS
 856                  * type interfaces use
 857                  */
 858                 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
 859                         return -EINVAL;
 860
 861                 /* DFS is not supported with multi-channel combinations yet */
 862                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
 863                         const struct ieee80211_iface_combination *comb;
 864
 865                         comb = &local->hw.wiphy->iface_combinations[i];
 866
 867                         if (comb->radar_detect_widths &&
 868                             comb->num_different_channels > 1)
 869                                 return -EINVAL;
 870                 }
 871         }
 872
 873         /* Only HW csum features are currently compatible with mac80211 */
 874         feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
 875                             NETIF_F_HW_CSUM | NETIF_F_SG | NETIF_F_HIGHDMA |
 876                             NETIF_F_GSO_SOFTWARE | NETIF_F_RXCSUM;
 877         if (WARN_ON(hw->netdev_features & ~feature_whitelist))
 878                 return -EINVAL;
 879
 880         if (hw->max_report_rates == 0)
 881                 hw->max_report_rates = hw->max_rates;
 882
 883         local->rx_chains = 1;
 884
 885         /*
 886          * generic code guarantees at least one band,
 887          * set this very early because much code assumes
 888          * that hw.conf.channel is assigned
 889          */
 890         channels = 0;
 891         max_bitrates = 0;
 892         supp_ht = false;
 893         supp_vht = false;
 894         for (band = 0; band < NUM_NL80211_BANDS; band++) {
 895                 struct ieee80211_supported_band *sband;
 896
 897                 sband = local->hw.wiphy->bands[band];
 898                 if (!sband)
 899                         continue;
 900
 901                 if (!dflt_chandef.chan) {
 902                         cfg80211_chandef_create(&dflt_chandef,
 903                                                 &sband->channels[0],
 904                                                 NL80211_CHAN_NO_HT);
 905                         /* init channel we're on */
 906                         if (!local->use_chanctx && !local->_oper_chandef.chan) {
 907                                 local->hw.conf.chandef = dflt_chandef;
 908                                 local->_oper_chandef = dflt_chandef;
 909                         }
 910                         local->monitor_chandef = dflt_chandef;
 911                 }
 912
 913                 channels += sband->n_channels;
 914
 915                 if (max_bitrates < sband->n_bitrates)
 916                         max_bitrates = sband->n_bitrates;
 917                 supp_ht = supp_ht || sband->ht_cap.ht_supported;
 918                 supp_vht = supp_vht || sband->vht_cap.vht_supported;
 919
 920                 if (!sband->ht_cap.ht_supported)
 921                         continue;
 922
 923                 /* TODO: consider VHT for RX chains, hopefully it's the same */
 924                 local->rx_chains =
 925                         max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
 926                             local->rx_chains);
 927
 928                 /* no need to mask, SM_PS_DISABLED has all bits set */
 929                 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
 930                                      IEEE80211_HT_CAP_SM_PS_SHIFT;
 931         }
 932
 933         /* if low-level driver supports AP, we also support VLAN */
 934         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
 935                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
 936                 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
 937         }
 938
 939         /* mac80211 always supports monitor */
 940         hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
 941         hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
 942
 943         /* mac80211 doesn't support more than one IBSS interface right now */
 944         for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
 945                 const struct ieee80211_iface_combination *c;
 946                 int j;
 947
 948                 c = &hw->wiphy->iface_combinations[i];
 949
 950                 for (j = 0; j < c->n_limits; j++)
 951                         if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
 952                             c->limits[j].max > 1)
 953                                 return -EINVAL;
 954         }
 955
 956         local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
 957                                       sizeof(void *) * channels, GFP_KERNEL);
 958         if (!local->int_scan_req)
 959                 return -ENOMEM;
 960
 961         for (band = 0; band < NUM_NL80211_BANDS; band++) {
 962                 if (!local->hw.wiphy->bands[band])
 963                         continue;
 964                 local->int_scan_req->rates[band] = (u32) -1;
 965         }
 966
 967 #ifndef CONFIG_MAC80211_MESH
 968         /* mesh depends on Kconfig, but drivers should set it if they want */
 969         local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
 970 #endif
 971
 972         /* if the underlying driver supports mesh, mac80211 will (at least)
 973          * provide routing of mesh authentication frames to userspace */
 974         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
 975                 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
 976
 977         /* mac80211 supports control port protocol changing */
 978         local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
 979
 980         if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) {
 981                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
 982         } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) {
 983                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
 984                 if (hw->max_signal <= 0) {
 985                         result = -EINVAL;
 986                         goto fail_wiphy_register;
 987                 }
 988         }
 989
 990         /*
 991          * Calculate scan IE length -- we need this to alloc
 992          * memory and to subtract from the driver limit. It
 993          * includes the DS Params, (extended) supported rates, and HT
 994          * information -- SSID is the driver's responsibility.
 995          */
 996         local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
 997                 3 /* DS Params */;
 998         if (supp_ht)
 999                 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
1000
1001         if (supp_vht)
1002                 local->scan_ies_len +=
1003                         2 + sizeof(struct ieee80211_vht_cap);
1004
1005         if (!local->ops->hw_scan) {
1006                 /* For hw_scan, driver needs to set these up. */
1007                 local->hw.wiphy->max_scan_ssids = 4;
1008                 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
1009         }
1010
1011         /*
1012          * If the driver supports any scan IEs, then assume the
1013          * limit includes the IEs mac80211 will add, otherwise
1014          * leave it at zero and let the driver sort it out; we
1015          * still pass our IEs to the driver but userspace will
1016          * not be allowed to in that case.
1017          */
1018         if (local->hw.wiphy->max_scan_ie_len)
1019                 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
1020
1021         WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes,
1022                                          local->hw.n_cipher_schemes));
1023
1024         result = ieee80211_init_cipher_suites(local);
1025         if (result < 0)
1026                 goto fail_wiphy_register;
1027
1028         if (!local->ops->remain_on_channel)
1029                 local->hw.wiphy->max_remain_on_channel_duration = 5000;
1030
1031         /* mac80211 based drivers don't support internal TDLS setup */
1032         if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
1033                 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
1034
1035         /* mac80211 supports eCSA, if the driver supports STA CSA at all */
1036         if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA))
1037                 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
1038
1039         local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM;
1040
1041         result = wiphy_register(local->hw.wiphy);
1042         if (result < 0)
1043                 goto fail_wiphy_register;
1044
1045         /*
1046          * We use the number of queues for feature tests (QoS, HT) internally
1047          * so restrict them appropriately.
1048          */
1049         if (hw->queues > IEEE80211_MAX_QUEUES)
1050                 hw->queues = IEEE80211_MAX_QUEUES;
1051
1052         local->workqueue =
1053                 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1054         if (!local->workqueue) {
1055                 result = -ENOMEM;
1056                 goto fail_workqueue;
1057         }
1058
1059         /*
1060          * The hardware needs headroom for sending the frame,
1061          * and we need some headroom for passing the frame to monitor
1062          * interfaces, but never both at the same time.
1063          */
1064         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1065                                    IEEE80211_TX_STATUS_HEADROOM);
1066
1067         debugfs_hw_add(local);
1068
1069         /*
1070          * if the driver doesn't specify a max listen interval we
1071          * use 5 which should be a safe default
1072          */
1073         if (local->hw.max_listen_interval == 0)
1074                 local->hw.max_listen_interval = 5;
1075
1076         local->hw.conf.listen_interval = local->hw.max_listen_interval;
1077
1078         local->dynamic_ps_forced_timeout = -1;
1079
1080         if (!local->hw.max_nan_de_entries)
1081                 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID;
1082
1083         result = ieee80211_wep_init(local);
1084         if (result < 0)
1085                 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
1086                             result);
1087
1088         local->hw.conf.flags = IEEE80211_CONF_IDLE;
1089
1090         ieee80211_led_init(local);
1091
1092         rtnl_lock();
1093
1094         result = ieee80211_init_rate_ctrl_alg(local,
1095                                               hw->rate_control_algorithm);
1096         if (result < 0) {
1097                 wiphy_debug(local->hw.wiphy,
1098                             "Failed to initialize rate control algorithm\n");
1099                 goto fail_rate;
1100         }
1101
1102         /* add one default STA interface if supported */
1103         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1104             !ieee80211_hw_check(hw, NO_AUTO_VIF)) {
1105                 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1106                                           NL80211_IFTYPE_STATION, NULL);
1107                 if (result)
1108                         wiphy_warn(local->hw.wiphy,
1109                                    "Failed to add default virtual iface\n");
1110         }
1111
1112         rtnl_unlock();
1113
1114         result = ieee80211_txq_setup_flows(local);
1115         if (result)
1116                 goto fail_flows;
1117
1118 #ifdef CONFIG_INET
1119         local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1120         result = register_inetaddr_notifier(&local->ifa_notifier);
1121         if (result)
1122                 goto fail_ifa;
1123 #endif
1124
1125 #if IS_ENABLED(CONFIG_IPV6)
1126         local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1127         result = register_inet6addr_notifier(&local->ifa6_notifier);
1128         if (result)
1129                 goto fail_ifa6;
1130 #endif
1131
1132         return 0;
1133
1134 #if IS_ENABLED(CONFIG_IPV6)
1135  fail_ifa6:
1136 #ifdef CONFIG_INET
1137         unregister_inetaddr_notifier(&local->ifa_notifier);
1138 #endif
1139 #endif
1140 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1141  fail_ifa:
1142 #endif
1143         ieee80211_txq_teardown_flows(local);
1144  fail_flows:
1145         rtnl_lock();
1146         rate_control_deinitialize(local);
1147         ieee80211_remove_interfaces(local);
1148  fail_rate:
1149         rtnl_unlock();
1150         ieee80211_led_exit(local);
1151         ieee80211_wep_free(local);
1152         destroy_workqueue(local->workqueue);
1153  fail_workqueue:
1154         wiphy_unregister(local->hw.wiphy);
1155  fail_wiphy_register:
1156         if (local->wiphy_ciphers_allocated)
1157                 kfree(local->hw.wiphy->cipher_suites);
1158         kfree(local->int_scan_req);
1159         return result;
1160 }
1161 EXPORT_SYMBOL(ieee80211_register_hw);
1162
1163 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1164 {
1165         struct ieee80211_local *local = hw_to_local(hw);
1166
1167         tasklet_kill(&local->tx_pending_tasklet);
1168         tasklet_kill(&local->tasklet);
1169
1170 #ifdef CONFIG_INET
1171         unregister_inetaddr_notifier(&local->ifa_notifier);
1172 #endif
1173 #if IS_ENABLED(CONFIG_IPV6)
1174         unregister_inet6addr_notifier(&local->ifa6_notifier);
1175 #endif
1176
1177         rtnl_lock();
1178
1179         /*
1180          * At this point, interface list manipulations are fine
1181          * because the driver cannot be handing us frames any
1182          * more and the tasklet is killed.
1183          */
1184         ieee80211_remove_interfaces(local);
1185
1186         rtnl_unlock();
1187
1188         cancel_delayed_work_sync(&local->roc_work);
1189         cancel_work_sync(&local->restart_work);
1190         cancel_work_sync(&local->reconfig_filter);
1191         cancel_work_sync(&local->tdls_chsw_work);
1192         flush_work(&local->sched_scan_stopped_work);
1193         flush_work(&local->radar_detected_work);
1194
1195         ieee80211_clear_tx_pending(local);
1196         rate_control_deinitialize(local);
1197
1198         if (skb_queue_len(&local->skb_queue) ||
1199             skb_queue_len(&local->skb_queue_unreliable))
1200                 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1201         skb_queue_purge(&local->skb_queue);
1202         skb_queue_purge(&local->skb_queue_unreliable);
1203         skb_queue_purge(&local->skb_queue_tdls_chsw);
1204         ieee80211_txq_teardown_flows(local);
1205
1206         destroy_workqueue(local->workqueue);
1207         wiphy_unregister(local->hw.wiphy);
1208         ieee80211_wep_free(local);
1209         ieee80211_led_exit(local);
1210         kfree(local->int_scan_req);
1211 }
1212 EXPORT_SYMBOL(ieee80211_unregister_hw);
1213
1214 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1215 {
1216         WARN_ONCE(1, "Have pending ack frames!\n");
1217         kfree_skb(p);
1218         return 0;
1219 }
1220
1221 void ieee80211_free_hw(struct ieee80211_hw *hw)
1222 {
1223         struct ieee80211_local *local = hw_to_local(hw);
1224
1225         mutex_destroy(&local->iflist_mtx);
1226         mutex_destroy(&local->mtx);
1227
1228         if (local->wiphy_ciphers_allocated)
1229                 kfree(local->hw.wiphy->cipher_suites);
1230
1231         idr_for_each(&local->ack_status_frames,
1232                      ieee80211_free_ack_frame, NULL);
1233         idr_destroy(&local->ack_status_frames);
1234
1235         sta_info_stop(local);
1236
1237         ieee80211_free_led_names(local);
1238
1239         wiphy_free(local->hw.wiphy);
1240 }
1241 EXPORT_SYMBOL(ieee80211_free_hw);
1242
1243 static int __init ieee80211_init(void)
1244 {
1245         struct sk_buff *skb;
1246         int ret;
1247
1248         BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1249         BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1250                      IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1251
1252         ret = rc80211_minstrel_init();
1253         if (ret)
1254                 return ret;
1255
1256         ret = rc80211_minstrel_ht_init();
1257         if (ret)
1258                 goto err_minstrel;
1259
1260         ret = ieee80211_iface_init();
1261         if (ret)
1262                 goto err_netdev;
1263
1264         return 0;
1265  err_netdev:
1266         rc80211_minstrel_ht_exit();
1267  err_minstrel:
1268         rc80211_minstrel_exit();
1269
1270         return ret;
1271 }
1272
1273 static void __exit ieee80211_exit(void)
1274 {
1275         rc80211_minstrel_ht_exit();
1276         rc80211_minstrel_exit();
1277
1278         ieee80211s_stop();
1279
1280         ieee80211_iface_exit();
1281
1282         rcu_barrier();
1283 }
1284
1285
1286 subsys_initcall(ieee80211_init);
1287 module_exit(ieee80211_exit);
1288
1289 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1290 MODULE_LICENSE("GPL");