net/mac80211/main.c

   1 /*
   2  * Copyright 2002-2005, Instant802 Networks, Inc.
   3  * Copyright 2005-2006, Devicescape Software, Inc.
   4  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 #include <net/mac80211.h>
  12 #include <linux/module.h>
  13 #include <linux/init.h>
  14 #include <linux/netdevice.h>
  15 #include <linux/types.h>
  16 #include <linux/slab.h>
  17 #include <linux/skbuff.h>
  18 #include <linux/etherdevice.h>
  19 #include <linux/if_arp.h>
  20 #include <linux/rtnetlink.h>
  21 #include <linux/bitmap.h>
  22 #include <linux/pm_qos.h>
  23 #include <linux/inetdevice.h>
  24 #include <net/net_namespace.h>
  25 #include <net/cfg80211.h>
  26 #include <net/addrconf.h>
  27
  28 #include "ieee80211_i.h"
  29 #include "driver-ops.h"
  30 #include "rate.h"
  31 #include "mesh.h"
  32 #include "wep.h"
  33 #include "led.h"
  34 #include "cfg.h"
  35 #include "debugfs.h"
  36
  37 void ieee80211_configure_filter(struct ieee80211_local *local)
  38 {
  39         u64 mc;
  40         unsigned int changed_flags;
  41         unsigned int new_flags = 0;
  42
  43         if (atomic_read(&local->iff_promiscs))
  44                 new_flags |= FIF_PROMISC_IN_BSS;
  45
  46         if (atomic_read(&local->iff_allmultis))
  47                 new_flags |= FIF_ALLMULTI;
  48
  49         if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) ||
  50             test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning))
  51                 new_flags |= FIF_BCN_PRBRESP_PROMISC;
  52
  53         if (local->fif_probe_req || local->probe_req_reg)
  54                 new_flags |= FIF_PROBE_REQ;
  55
  56         if (local->fif_fcsfail)
  57                 new_flags |= FIF_FCSFAIL;
  58
  59         if (local->fif_plcpfail)
  60                 new_flags |= FIF_PLCPFAIL;
  61
  62         if (local->fif_control)
  63                 new_flags |= FIF_CONTROL;
  64
  65         if (local->fif_other_bss)
  66                 new_flags |= FIF_OTHER_BSS;
  67
  68         if (local->fif_pspoll)
  69                 new_flags |= FIF_PSPOLL;
  70
  71         spin_lock_bh(&local->filter_lock);
  72         changed_flags = local->filter_flags ^ new_flags;
  73
  74         mc = drv_prepare_multicast(local, &local->mc_list);
  75         spin_unlock_bh(&local->filter_lock);
  76
  77         /* be a bit nasty */
  78         new_flags |= (1<<31);
  79
  80         drv_configure_filter(local, changed_flags, &new_flags, mc);
  81
  82         WARN_ON(new_flags & (1<<31));
  83
  84         local->filter_flags = new_flags & ~(1<<31);
  85 }
  86
  87 static void ieee80211_reconfig_filter(struct work_struct *work)
  88 {
  89         struct ieee80211_local *local =
  90                 container_of(work, struct ieee80211_local, reconfig_filter);
  91
  92         ieee80211_configure_filter(local);
  93 }
  94
  95 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
  96 {
  97         struct ieee80211_sub_if_data *sdata;
  98         struct cfg80211_chan_def chandef = {};
  99         u32 changed = 0;
 100         int power;
 101         u32 offchannel_flag;
 102
 103         offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
 104
 105         if (local->scan_channel) {
 106                 chandef.chan = local->scan_channel;
 107                 /* If scanning on oper channel, use whatever channel-type
 108                  * is currently in use.
 109                  */
 110                 if (chandef.chan == local->_oper_chandef.chan) {
 111                         chandef = local->_oper_chandef;
 112                 } else {
 113                         chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
 114                         chandef.center_freq1 = chandef.chan->center_freq;
 115                 }
 116         } else if (local->tmp_channel) {
 117                 chandef.chan = local->tmp_channel;
 118                 chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
 119                 chandef.center_freq1 = chandef.chan->center_freq;
 120         } else
 121                 chandef = local->_oper_chandef;
 122
 123         WARN(!cfg80211_chandef_valid(&chandef),
 124              "control:%d MHz width:%d center: %d/%d MHz",
 125              chandef.chan->center_freq, chandef.width,
 126              chandef.center_freq1, chandef.center_freq2);
 127
 128         if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef))
 129                 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
 130         else
 131                 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
 132
 133         offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
 134
 135         if (offchannel_flag ||
 136             !cfg80211_chandef_identical(&local->hw.conf.chandef,
 137                                         &local->_oper_chandef)) {
 138                 local->hw.conf.chandef = chandef;
 139                 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
 140         }
 141
 142         if (!conf_is_ht(&local->hw.conf)) {
 143                 /*
 144                  * mac80211.h documents that this is only valid
 145                  * when the channel is set to an HT type, and
 146                  * that otherwise STATIC is used.
 147                  */
 148                 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
 149         } else if (local->hw.conf.smps_mode != local->smps_mode) {
 150                 local->hw.conf.smps_mode = local->smps_mode;
 151                 changed |= IEEE80211_CONF_CHANGE_SMPS;
 152         }
 153
 154         power = chandef.chan->max_power;
 155
 156         rcu_read_lock();
 157         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 158                 if (!rcu_access_pointer(sdata->vif.chanctx_conf))
 159                         continue;
 160                 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
 161                         continue;
 162                 power = min(power, sdata->vif.bss_conf.txpower);
 163         }
 164         rcu_read_unlock();
 165
 166         if (local->hw.conf.power_level != power) {
 167                 changed |= IEEE80211_CONF_CHANGE_POWER;
 168                 local->hw.conf.power_level = power;
 169         }
 170
 171         return changed;
 172 }
 173
 174 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
 175 {
 176         int ret = 0;
 177
 178         might_sleep();
 179
 180         if (!local->use_chanctx)
 181                 changed |= ieee80211_hw_conf_chan(local);
 182         else
 183                 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
 184                              IEEE80211_CONF_CHANGE_POWER);
 185
 186         if (changed && local->open_count) {
 187                 ret = drv_config(local, changed);
 188                 /*
 189                  * Goal:
 190                  * HW reconfiguration should never fail, the driver has told
 191                  * us what it can support so it should live up to that promise.
 192                  *
 193                  * Current status:
 194                  * rfkill is not integrated with mac80211 and a
 195                  * configuration command can thus fail if hardware rfkill
 196                  * is enabled
 197                  *
 198                  * FIXME: integrate rfkill with mac80211 and then add this
 199                  * WARN_ON() back
 200                  *
 201                  */
 202                 /* WARN_ON(ret); */
 203         }
 204
 205         return ret;
 206 }
 207
 208 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
 209                                       u32 changed)
 210 {
 211         struct ieee80211_local *local = sdata->local;
 212
 213         if (!changed)
 214                 return;
 215
 216         drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
 217 }
 218
 219 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
 220 {
 221         sdata->vif.bss_conf.use_cts_prot = false;
 222         sdata->vif.bss_conf.use_short_preamble = false;
 223         sdata->vif.bss_conf.use_short_slot = false;
 224         return BSS_CHANGED_ERP_CTS_PROT |
 225                BSS_CHANGED_ERP_PREAMBLE |
 226                BSS_CHANGED_ERP_SLOT;
 227 }
 228
 229 static void ieee80211_tasklet_handler(unsigned long data)
 230 {
 231         struct ieee80211_local *local = (struct ieee80211_local *) data;
 232         struct sk_buff *skb;
 233
 234         while ((skb = skb_dequeue(&local->skb_queue)) ||
 235                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
 236                 switch (skb->pkt_type) {
 237                 case IEEE80211_RX_MSG:
 238                         /* Clear skb->pkt_type in order to not confuse kernel
 239                          * netstack. */
 240                         skb->pkt_type = 0;
 241                         ieee80211_rx(&local->hw, skb);
 242                         break;
 243                 case IEEE80211_TX_STATUS_MSG:
 244                         skb->pkt_type = 0;
 245                         ieee80211_tx_status(&local->hw, skb);
 246                         break;
 247                 default:
 248                         WARN(1, "mac80211: Packet is of unknown type %d\n",
 249                              skb->pkt_type);
 250                         dev_kfree_skb(skb);
 251                         break;
 252                 }
 253         }
 254 }
 255
 256 static void ieee80211_restart_work(struct work_struct *work)
 257 {
 258         struct ieee80211_local *local =
 259                 container_of(work, struct ieee80211_local, restart_work);
 260
 261         /* wait for scan work complete */
 262         flush_workqueue(local->workqueue);
 263
 264         mutex_lock(&local->mtx);
 265         WARN(test_bit(SCAN_HW_SCANNING, &local->scanning) ||
 266              rcu_dereference_protected(local->sched_scan_sdata,
 267                                        lockdep_is_held(&local->mtx)),
 268                 "%s called with hardware scan in progress\n", __func__);
 269         mutex_unlock(&local->mtx);
 270
 271         rtnl_lock();
 272         ieee80211_scan_cancel(local);
 273         ieee80211_reconfig(local);
 274         rtnl_unlock();
 275 }
 276
 277 void ieee80211_restart_hw(struct ieee80211_hw *hw)
 278 {
 279         struct ieee80211_local *local = hw_to_local(hw);
 280
 281         trace_api_restart_hw(local);
 282
 283         wiphy_info(hw->wiphy,
 284                    "Hardware restart was requested\n");
 285
 286         /* use this reason, ieee80211_reconfig will unblock it */
 287         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 288                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND);
 289
 290         /*
 291          * Stop all Rx during the reconfig. We don't want state changes
 292          * or driver callbacks while this is in progress.
 293          */
 294         local->in_reconfig = true;
 295         barrier();
 296
 297         schedule_work(&local->restart_work);
 298 }
 299 EXPORT_SYMBOL(ieee80211_restart_hw);
 300
 301 #ifdef CONFIG_INET
 302 static int ieee80211_ifa_changed(struct notifier_block *nb,
 303                                  unsigned long data, void *arg)
 304 {
 305         struct in_ifaddr *ifa = arg;
 306         struct ieee80211_local *local =
 307                 container_of(nb, struct ieee80211_local,
 308                              ifa_notifier);
 309         struct net_device *ndev = ifa->ifa_dev->dev;
 310         struct wireless_dev *wdev = ndev->ieee80211_ptr;
 311         struct in_device *idev;
 312         struct ieee80211_sub_if_data *sdata;
 313         struct ieee80211_bss_conf *bss_conf;
 314         struct ieee80211_if_managed *ifmgd;
 315         int c = 0;
 316
 317         /* Make sure it's our interface that got changed */
 318         if (!wdev)
 319                 return NOTIFY_DONE;
 320
 321         if (wdev->wiphy != local->hw.wiphy)
 322                 return NOTIFY_DONE;
 323
 324         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
 325         bss_conf = &sdata->vif.bss_conf;
 326
 327         /* ARP filtering is only supported in managed mode */
 328         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 329                 return NOTIFY_DONE;
 330
 331         idev = __in_dev_get_rtnl(sdata->dev);
 332         if (!idev)
 333                 return NOTIFY_DONE;
 334
 335         ifmgd = &sdata->u.mgd;
 336         mutex_lock(&ifmgd->mtx);
 337
 338         /* Copy the addresses to the bss_conf list */
 339         ifa = idev->ifa_list;
 340         while (ifa) {
 341                 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
 342                         bss_conf->arp_addr_list[c] = ifa->ifa_address;
 343                 ifa = ifa->ifa_next;
 344                 c++;
 345         }
 346
 347         bss_conf->arp_addr_cnt = c;
 348
 349         /* Configure driver only if associated (which also implies it is up) */
 350         if (ifmgd->associated)
 351                 ieee80211_bss_info_change_notify(sdata,
 352                                                  BSS_CHANGED_ARP_FILTER);
 353
 354         mutex_unlock(&ifmgd->mtx);
 355
 356         return NOTIFY_DONE;
 357 }
 358 #endif
 359
 360 #if IS_ENABLED(CONFIG_IPV6)
 361 static int ieee80211_ifa6_changed(struct notifier_block *nb,
 362                                   unsigned long data, void *arg)
 363 {
 364         struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
 365         struct inet6_dev *idev = ifa->idev;
 366         struct net_device *ndev = ifa->idev->dev;
 367         struct ieee80211_local *local =
 368                 container_of(nb, struct ieee80211_local, ifa6_notifier);
 369         struct wireless_dev *wdev = ndev->ieee80211_ptr;
 370         struct ieee80211_sub_if_data *sdata;
 371
 372         /* Make sure it's our interface that got changed */
 373         if (!wdev || wdev->wiphy != local->hw.wiphy)
 374                 return NOTIFY_DONE;
 375
 376         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
 377
 378         /*
 379          * For now only support station mode. This is mostly because
 380          * doing AP would have to handle AP_VLAN in some way ...
 381          */
 382         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 383                 return NOTIFY_DONE;
 384
 385         drv_ipv6_addr_change(local, sdata, idev);
 386
 387         return NOTIFY_DONE;
 388 }
 389 #endif
 390
 391 /* There isn't a lot of sense in it, but you can transmit anything you like */
 392 static const struct ieee80211_txrx_stypes
 393 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
 394         [NL80211_IFTYPE_ADHOC] = {
 395                 .tx = 0xffff,
 396                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 397                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 398                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 399                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 400         },
 401         [NL80211_IFTYPE_STATION] = {
 402                 .tx = 0xffff,
 403                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 404                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 405         },
 406         [NL80211_IFTYPE_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_AP_VLAN] = {
 417                 /* copy AP */
 418                 .tx = 0xffff,
 419                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 420                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 421                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 422                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 423                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 424                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 425                         BIT(IEEE80211_STYPE_ACTION >> 4),
 426         },
 427         [NL80211_IFTYPE_P2P_CLIENT] = {
 428                 .tx = 0xffff,
 429                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 430                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 431         },
 432         [NL80211_IFTYPE_P2P_GO] = {
 433                 .tx = 0xffff,
 434                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 435                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 436                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 437                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 438                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 439                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 440                         BIT(IEEE80211_STYPE_ACTION >> 4),
 441         },
 442         [NL80211_IFTYPE_MESH_POINT] = {
 443                 .tx = 0xffff,
 444                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 445                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 446                         BIT(IEEE80211_STYPE_DEAUTH >> 4),
 447         },
 448         [NL80211_IFTYPE_P2P_DEVICE] = {
 449                 .tx = 0xffff,
 450                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 451                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 452         },
 453 };
 454
 455 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
 456         .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
 457                              IEEE80211_HT_AMPDU_PARM_DENSITY,
 458
 459         .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
 460                                 IEEE80211_HT_CAP_MAX_AMSDU |
 461                                 IEEE80211_HT_CAP_SGI_20 |
 462                                 IEEE80211_HT_CAP_SGI_40),
 463         .mcs = {
 464                 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
 465                              0xff, 0xff, 0xff, 0xff, 0xff, },
 466         },
 467 };
 468
 469 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
 470         .vht_cap_info =
 471                 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
 472                             IEEE80211_VHT_CAP_SHORT_GI_80 |
 473                             IEEE80211_VHT_CAP_SHORT_GI_160 |
 474                             IEEE80211_VHT_CAP_RXSTBC_1 |
 475                             IEEE80211_VHT_CAP_RXSTBC_2 |
 476                             IEEE80211_VHT_CAP_RXSTBC_3 |
 477                             IEEE80211_VHT_CAP_RXSTBC_4 |
 478                             IEEE80211_VHT_CAP_TXSTBC |
 479                             IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
 480                             IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
 481                             IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
 482                             IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
 483                             IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
 484         .supp_mcs = {
 485                 .rx_mcs_map = cpu_to_le16(~0),
 486                 .tx_mcs_map = cpu_to_le16(~0),
 487         },
 488 };
 489
 490 static const u8 extended_capabilities[] = {
 491         0, 0, 0, 0, 0, 0, 0,
 492         WLAN_EXT_CAPA8_OPMODE_NOTIF,
 493 };
 494
 495 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
 496                                         const struct ieee80211_ops *ops)
 497 {
 498         struct ieee80211_local *local;
 499         int priv_size, i;
 500         struct wiphy *wiphy;
 501         bool use_chanctx;
 502
 503         if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
 504                     !ops->add_interface || !ops->remove_interface ||
 505                     !ops->configure_filter))
 506                 return NULL;
 507
 508         if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
 509                 return NULL;
 510
 511         /* check all or no channel context operations exist */
 512         i = !!ops->add_chanctx + !!ops->remove_chanctx +
 513             !!ops->change_chanctx + !!ops->assign_vif_chanctx +
 514             !!ops->unassign_vif_chanctx;
 515         if (WARN_ON(i != 0 && i != 5))
 516                 return NULL;
 517         use_chanctx = i == 5;
 518
 519         /* Ensure 32-byte alignment of our private data and hw private data.
 520          * We use the wiphy priv data for both our ieee80211_local and for
 521          * the driver's private data
 522          *
 523          * In memory it'll be like this:
 524          *
 525          * +-------------------------+
 526          * | struct wiphy           |
 527          * +-------------------------+
 528          * | struct ieee80211_local  |
 529          * +-------------------------+
 530          * | driver's private data   |
 531          * +-------------------------+
 532          *
 533          */
 534         priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
 535
 536         wiphy = wiphy_new(&mac80211_config_ops, priv_size);
 537
 538         if (!wiphy)
 539                 return NULL;
 540
 541         wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
 542
 543         wiphy->privid = mac80211_wiphy_privid;
 544
 545         wiphy->flags |= WIPHY_FLAG_NETNS_OK |
 546                         WIPHY_FLAG_4ADDR_AP |
 547                         WIPHY_FLAG_4ADDR_STATION |
 548                         WIPHY_FLAG_REPORTS_OBSS |
 549                         WIPHY_FLAG_OFFCHAN_TX;
 550
 551         wiphy->extended_capabilities = extended_capabilities;
 552         wiphy->extended_capabilities_mask = extended_capabilities;
 553         wiphy->extended_capabilities_len = ARRAY_SIZE(extended_capabilities);
 554
 555         if (ops->remain_on_channel)
 556                 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
 557
 558         wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
 559                            NL80211_FEATURE_SAE |
 560                            NL80211_FEATURE_HT_IBSS |
 561                            NL80211_FEATURE_VIF_TXPOWER |
 562                            NL80211_FEATURE_USERSPACE_MPM;
 563
 564         if (!ops->hw_scan)
 565                 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
 566                                    NL80211_FEATURE_AP_SCAN;
 567
 568
 569         if (!ops->set_key)
 570                 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 571
 572         wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
 573
 574         local = wiphy_priv(wiphy);
 575
 576         local->hw.wiphy = wiphy;
 577
 578         local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
 579
 580         local->ops = ops;
 581         local->use_chanctx = use_chanctx;
 582
 583         /* set up some defaults */
 584         local->hw.queues = 1;
 585         local->hw.max_rates = 1;
 586         local->hw.max_report_rates = 0;
 587         local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
 588         local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
 589         local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
 590         local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
 591         local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
 592         local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
 593                                          IEEE80211_RADIOTAP_MCS_HAVE_GI |
 594                                          IEEE80211_RADIOTAP_MCS_HAVE_BW;
 595         local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
 596                                          IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
 597         local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
 598         local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
 599         local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
 600         wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
 601         wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
 602
 603         INIT_LIST_HEAD(&local->interfaces);
 604
 605         __hw_addr_init(&local->mc_list);
 606
 607         mutex_init(&local->iflist_mtx);
 608         mutex_init(&local->mtx);
 609
 610         mutex_init(&local->key_mtx);
 611         spin_lock_init(&local->filter_lock);
 612         spin_lock_init(&local->rx_path_lock);
 613         spin_lock_init(&local->queue_stop_reason_lock);
 614
 615         INIT_LIST_HEAD(&local->chanctx_list);
 616         mutex_init(&local->chanctx_mtx);
 617
 618         INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
 619
 620         INIT_WORK(&local->restart_work, ieee80211_restart_work);
 621
 622         INIT_WORK(&local->radar_detected_work,
 623                   ieee80211_dfs_radar_detected_work);
 624
 625         INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
 626         local->smps_mode = IEEE80211_SMPS_OFF;
 627
 628         INIT_WORK(&local->dynamic_ps_enable_work,
 629                   ieee80211_dynamic_ps_enable_work);
 630         INIT_WORK(&local->dynamic_ps_disable_work,
 631                   ieee80211_dynamic_ps_disable_work);
 632         setup_timer(&local->dynamic_ps_timer,
 633                     ieee80211_dynamic_ps_timer, (unsigned long) local);
 634
 635         INIT_WORK(&local->sched_scan_stopped_work,
 636                   ieee80211_sched_scan_stopped_work);
 637
 638         spin_lock_init(&local->ack_status_lock);
 639         idr_init(&local->ack_status_frames);
 640
 641         sta_info_init(local);
 642
 643         for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
 644                 skb_queue_head_init(&local->pending[i]);
 645                 atomic_set(&local->agg_queue_stop[i], 0);
 646         }
 647         tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
 648                      (unsigned long)local);
 649
 650         tasklet_init(&local->tasklet,
 651                      ieee80211_tasklet_handler,
 652                      (unsigned long) local);
 653
 654         skb_queue_head_init(&local->skb_queue);
 655         skb_queue_head_init(&local->skb_queue_unreliable);
 656
 657         ieee80211_led_names(local);
 658
 659         ieee80211_roc_setup(local);
 660
 661         return &local->hw;
 662 }
 663 EXPORT_SYMBOL(ieee80211_alloc_hw);
 664
 665 int ieee80211_register_hw(struct ieee80211_hw *hw)
 666 {
 667         struct ieee80211_local *local = hw_to_local(hw);
 668         int result, i;
 669         enum ieee80211_band band;
 670         int channels, max_bitrates;
 671         bool supp_ht, supp_vht;
 672         netdev_features_t feature_whitelist;
 673         struct cfg80211_chan_def dflt_chandef = {};
 674         static const u32 cipher_suites[] = {
 675                 /* keep WEP first, it may be removed below */
 676                 WLAN_CIPHER_SUITE_WEP40,
 677                 WLAN_CIPHER_SUITE_WEP104,
 678                 WLAN_CIPHER_SUITE_TKIP,
 679                 WLAN_CIPHER_SUITE_CCMP,
 680
 681                 /* keep last -- depends on hw flags! */
 682                 WLAN_CIPHER_SUITE_AES_CMAC
 683         };
 684
 685         if (hw->flags & IEEE80211_HW_QUEUE_CONTROL &&
 686             (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
 687              local->hw.offchannel_tx_hw_queue >= local->hw.queues))
 688                 return -EINVAL;
 689
 690 #ifdef CONFIG_PM
 691         if ((hw->wiphy->wowlan.flags || hw->wiphy->wowlan.n_patterns) &&
 692             (!local->ops->suspend || !local->ops->resume))
 693                 return -EINVAL;
 694 #endif
 695
 696         if (!local->use_chanctx) {
 697                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
 698                         const struct ieee80211_iface_combination *comb;
 699
 700                         comb = &local->hw.wiphy->iface_combinations[i];
 701
 702                         if (comb->num_different_channels > 1)
 703                                 return -EINVAL;
 704                 }
 705         } else {
 706                 /*
 707                  * WDS is currently prohibited when channel contexts are used
 708                  * because there's no clear definition of which channel WDS
 709                  * type interfaces use
 710                  */
 711                 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
 712                         return -EINVAL;
 713
 714                 /* DFS currently not supported with channel context drivers */
 715                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
 716                         const struct ieee80211_iface_combination *comb;
 717
 718                         comb = &local->hw.wiphy->iface_combinations[i];
 719
 720                         if (comb->radar_detect_widths)
 721                                 return -EINVAL;
 722                 }
 723         }
 724
 725         /* Only HW csum features are currently compatible with mac80211 */
 726         feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
 727                             NETIF_F_HW_CSUM;
 728         if (WARN_ON(hw->netdev_features & ~feature_whitelist))
 729                 return -EINVAL;
 730
 731         if (hw->max_report_rates == 0)
 732                 hw->max_report_rates = hw->max_rates;
 733
 734         local->rx_chains = 1;
 735
 736         /*
 737          * generic code guarantees at least one band,
 738          * set this very early because much code assumes
 739          * that hw.conf.channel is assigned
 740          */
 741         channels = 0;
 742         max_bitrates = 0;
 743         supp_ht = false;
 744         supp_vht = false;
 745         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 746                 struct ieee80211_supported_band *sband;
 747
 748                 sband = local->hw.wiphy->bands[band];
 749                 if (!sband)
 750                         continue;
 751
 752                 if (!dflt_chandef.chan) {
 753                         cfg80211_chandef_create(&dflt_chandef,
 754                                                 &sband->channels[0],
 755                                                 NL80211_CHAN_NO_HT);
 756                         /* init channel we're on */
 757                         if (!local->use_chanctx && !local->_oper_chandef.chan) {
 758                                 local->hw.conf.chandef = dflt_chandef;
 759                                 local->_oper_chandef = dflt_chandef;
 760                         }
 761                         local->monitor_chandef = dflt_chandef;
 762                 }
 763
 764                 channels += sband->n_channels;
 765
 766                 if (max_bitrates < sband->n_bitrates)
 767                         max_bitrates = sband->n_bitrates;
 768                 supp_ht = supp_ht || sband->ht_cap.ht_supported;
 769                 supp_vht = supp_vht || sband->vht_cap.vht_supported;
 770
 771                 if (sband->ht_cap.ht_supported)
 772                         local->rx_chains =
 773                                 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
 774                                     local->rx_chains);
 775
 776                 /* TODO: consider VHT for RX chains, hopefully it's the same */
 777         }
 778
 779         local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
 780                                       sizeof(void *) * channels, GFP_KERNEL);
 781         if (!local->int_scan_req)
 782                 return -ENOMEM;
 783
 784         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 785                 if (!local->hw.wiphy->bands[band])
 786                         continue;
 787                 local->int_scan_req->rates[band] = (u32) -1;
 788         }
 789
 790         /* if low-level driver supports AP, we also support VLAN */
 791         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
 792                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
 793                 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
 794         }
 795
 796         /* mac80211 always supports monitor */
 797         hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
 798         hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
 799
 800         /* mac80211 doesn't support more than one IBSS interface right now */
 801         for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
 802                 const struct ieee80211_iface_combination *c;
 803                 int j;
 804
 805                 c = &hw->wiphy->iface_combinations[i];
 806
 807                 for (j = 0; j < c->n_limits; j++)
 808                         if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
 809                             c->limits[j].max > 1)
 810                                 return -EINVAL;
 811         }
 812
 813 #ifndef CONFIG_MAC80211_MESH
 814         /* mesh depends on Kconfig, but drivers should set it if they want */
 815         local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
 816 #endif
 817
 818         /* if the underlying driver supports mesh, mac80211 will (at least)
 819          * provide routing of mesh authentication frames to userspace */
 820         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
 821                 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
 822
 823         /* mac80211 supports control port protocol changing */
 824         local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
 825
 826         if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
 827                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
 828         else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)
 829                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
 830
 831         WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)
 832              && (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK),
 833              "U-APSD not supported with HW_PS_NULLFUNC_STACK\n");
 834
 835         /*
 836          * Calculate scan IE length -- we need this to alloc
 837          * memory and to subtract from the driver limit. It
 838          * includes the DS Params, (extended) supported rates, and HT
 839          * information -- SSID is the driver's responsibility.
 840          */
 841         local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
 842                 3 /* DS Params */;
 843         if (supp_ht)
 844                 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
 845
 846         if (supp_vht)
 847                 local->scan_ies_len +=
 848                         2 + sizeof(struct ieee80211_vht_cap);
 849
 850         if (!local->ops->hw_scan) {
 851                 /* For hw_scan, driver needs to set these up. */
 852                 local->hw.wiphy->max_scan_ssids = 4;
 853                 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
 854         }
 855
 856         /*
 857          * If the driver supports any scan IEs, then assume the
 858          * limit includes the IEs mac80211 will add, otherwise
 859          * leave it at zero and let the driver sort it out; we
 860          * still pass our IEs to the driver but userspace will
 861          * not be allowed to in that case.
 862          */
 863         if (local->hw.wiphy->max_scan_ie_len)
 864                 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
 865
 866         /* Set up cipher suites unless driver already did */
 867         if (!local->hw.wiphy->cipher_suites) {
 868                 local->hw.wiphy->cipher_suites = cipher_suites;
 869                 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
 870                 if (!(local->hw.flags & IEEE80211_HW_MFP_CAPABLE))
 871                         local->hw.wiphy->n_cipher_suites--;
 872         }
 873         if (IS_ERR(local->wep_tx_tfm) || IS_ERR(local->wep_rx_tfm)) {
 874                 if (local->hw.wiphy->cipher_suites == cipher_suites) {
 875                         local->hw.wiphy->cipher_suites += 2;
 876                         local->hw.wiphy->n_cipher_suites -= 2;
 877                 } else {
 878                         u32 *suites;
 879                         int r, w = 0;
 880
 881                         /* Filter out WEP */
 882
 883                         suites = kmemdup(
 884                                 local->hw.wiphy->cipher_suites,
 885                                 sizeof(u32) * local->hw.wiphy->n_cipher_suites,
 886                                 GFP_KERNEL);
 887                         if (!suites) {
 888                                 result = -ENOMEM;
 889                                 goto fail_wiphy_register;
 890                         }
 891                         for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
 892                                 u32 suite = local->hw.wiphy->cipher_suites[r];
 893                                 if (suite == WLAN_CIPHER_SUITE_WEP40 ||
 894                                     suite == WLAN_CIPHER_SUITE_WEP104)
 895                                         continue;
 896                                 suites[w++] = suite;
 897                         }
 898                         local->hw.wiphy->cipher_suites = suites;
 899                         local->hw.wiphy->n_cipher_suites = w;
 900                         local->wiphy_ciphers_allocated = true;
 901                 }
 902         }
 903
 904         if (!local->ops->remain_on_channel)
 905                 local->hw.wiphy->max_remain_on_channel_duration = 5000;
 906
 907         if (local->ops->sched_scan_start)
 908                 local->hw.wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
 909
 910         /* mac80211 based drivers don't support internal TDLS setup */
 911         if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
 912                 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
 913
 914         result = wiphy_register(local->hw.wiphy);
 915         if (result < 0)
 916                 goto fail_wiphy_register;
 917
 918         /*
 919          * We use the number of queues for feature tests (QoS, HT) internally
 920          * so restrict them appropriately.
 921          */
 922         if (hw->queues > IEEE80211_MAX_QUEUES)
 923                 hw->queues = IEEE80211_MAX_QUEUES;
 924
 925         local->workqueue =
 926                 alloc_ordered_workqueue(wiphy_name(local->hw.wiphy), 0);
 927         if (!local->workqueue) {
 928                 result = -ENOMEM;
 929                 goto fail_workqueue;
 930         }
 931
 932         /*
 933          * The hardware needs headroom for sending the frame,
 934          * and we need some headroom for passing the frame to monitor
 935          * interfaces, but never both at the same time.
 936          */
 937         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
 938                                    IEEE80211_TX_STATUS_HEADROOM);
 939
 940         debugfs_hw_add(local);
 941
 942         /*
 943          * if the driver doesn't specify a max listen interval we
 944          * use 5 which should be a safe default
 945          */
 946         if (local->hw.max_listen_interval == 0)
 947                 local->hw.max_listen_interval = 5;
 948
 949         local->hw.conf.listen_interval = local->hw.max_listen_interval;
 950
 951         local->dynamic_ps_forced_timeout = -1;
 952
 953         result = ieee80211_wep_init(local);
 954         if (result < 0)
 955                 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
 956                             result);
 957
 958         ieee80211_led_init(local);
 959
 960         rtnl_lock();
 961
 962         result = ieee80211_init_rate_ctrl_alg(local,
 963                                               hw->rate_control_algorithm);
 964         if (result < 0) {
 965                 wiphy_debug(local->hw.wiphy,
 966                             "Failed to initialize rate control algorithm\n");
 967                 goto fail_rate;
 968         }
 969
 970         /* add one default STA interface if supported */
 971         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) {
 972                 result = ieee80211_if_add(local, "wlan%d", NULL,
 973                                           NL80211_IFTYPE_STATION, NULL);
 974                 if (result)
 975                         wiphy_warn(local->hw.wiphy,
 976                                    "Failed to add default virtual iface\n");
 977         }
 978           // ESP8089 register p2p0 IFTYPE_STA
 979         #ifdef CONFIG_ESP8089
 980             if (local->hw.wiphy->interface_modes &(BIT(NL80211_IFTYPE_P2P_GO) |
 981         BIT(NL80211_IFTYPE_P2P_CLIENT))) {
 982                          result = ieee80211_if_add(local, "p2p%d", NULL,
 983                                             NL80211_IFTYPE_STATION, NULL);
 984                               if (result)
 985                                    wiphy_warn(local->hw.wiphy,
 986                                            "Failed to add default virtual iface\n");
 987                         }
 988
 989         #endif
 990         rtnl_unlock();
 991
 992         local->network_latency_notifier.notifier_call =
 993                 ieee80211_max_network_latency;
 994         result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY,
 995                                      &local->network_latency_notifier);
 996         if (result) {
 997                 rtnl_lock();
 998                 goto fail_pm_qos;
 999         }
1000
1001 #ifdef CONFIG_INET
1002         local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1003         result = register_inetaddr_notifier(&local->ifa_notifier);
1004         if (result)
1005                 goto fail_ifa;
1006 #endif
1007
1008 #if IS_ENABLED(CONFIG_IPV6)
1009         local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1010         result = register_inet6addr_notifier(&local->ifa6_notifier);
1011         if (result)
1012                 goto fail_ifa6;
1013 #endif
1014
1015         return 0;
1016
1017 #if IS_ENABLED(CONFIG_IPV6)
1018  fail_ifa6:
1019 #ifdef CONFIG_INET
1020         unregister_inetaddr_notifier(&local->ifa_notifier);
1021 #endif
1022 #endif
1023 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1024  fail_ifa:
1025         pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1026                                &local->network_latency_notifier);
1027         rtnl_lock();
1028 #endif
1029  fail_pm_qos:
1030         ieee80211_led_exit(local);
1031         ieee80211_remove_interfaces(local);
1032  fail_rate:
1033         rtnl_unlock();
1034         ieee80211_wep_free(local);
1035         sta_info_stop(local);
1036         destroy_workqueue(local->workqueue);
1037  fail_workqueue:
1038         wiphy_unregister(local->hw.wiphy);
1039  fail_wiphy_register:
1040         if (local->wiphy_ciphers_allocated)
1041                 kfree(local->hw.wiphy->cipher_suites);
1042         kfree(local->int_scan_req);
1043         return result;
1044 }
1045 EXPORT_SYMBOL(ieee80211_register_hw);
1046
1047 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1048 {
1049         struct ieee80211_local *local = hw_to_local(hw);
1050
1051         tasklet_kill(&local->tx_pending_tasklet);
1052         tasklet_kill(&local->tasklet);
1053
1054         pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1055                                &local->network_latency_notifier);
1056 #ifdef CONFIG_INET
1057         unregister_inetaddr_notifier(&local->ifa_notifier);
1058 #endif
1059 #if IS_ENABLED(CONFIG_IPV6)
1060         unregister_inet6addr_notifier(&local->ifa6_notifier);
1061 #endif
1062
1063         rtnl_lock();
1064
1065         /*
1066          * At this point, interface list manipulations are fine
1067          * because the driver cannot be handing us frames any
1068          * more and the tasklet is killed.
1069          */
1070         ieee80211_remove_interfaces(local);
1071
1072         rtnl_unlock();
1073
1074         cancel_work_sync(&local->restart_work);
1075         cancel_work_sync(&local->reconfig_filter);
1076
1077         ieee80211_clear_tx_pending(local);
1078         rate_control_deinitialize(local);
1079
1080         if (skb_queue_len(&local->skb_queue) ||
1081             skb_queue_len(&local->skb_queue_unreliable))
1082                 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1083         skb_queue_purge(&local->skb_queue);
1084         skb_queue_purge(&local->skb_queue_unreliable);
1085
1086         destroy_workqueue(local->workqueue);
1087         wiphy_unregister(local->hw.wiphy);
1088         sta_info_stop(local);
1089         ieee80211_wep_free(local);
1090         ieee80211_led_exit(local);
1091         kfree(local->int_scan_req);
1092 }
1093 EXPORT_SYMBOL(ieee80211_unregister_hw);
1094
1095 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1096 {
1097         WARN_ONCE(1, "Have pending ack frames!\n");
1098         kfree_skb(p);
1099         return 0;
1100 }
1101
1102 void ieee80211_free_hw(struct ieee80211_hw *hw)
1103 {
1104         struct ieee80211_local *local = hw_to_local(hw);
1105
1106         mutex_destroy(&local->iflist_mtx);
1107         mutex_destroy(&local->mtx);
1108
1109         if (local->wiphy_ciphers_allocated)
1110                 kfree(local->hw.wiphy->cipher_suites);
1111
1112         idr_for_each(&local->ack_status_frames,
1113                      ieee80211_free_ack_frame, NULL);
1114         idr_destroy(&local->ack_status_frames);
1115
1116         wiphy_free(local->hw.wiphy);
1117 }
1118 EXPORT_SYMBOL(ieee80211_free_hw);
1119
1120 static int __init ieee80211_init(void)
1121 {
1122         struct sk_buff *skb;
1123         int ret;
1124
1125         BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1126         BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1127                      IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1128
1129         ret = rc80211_minstrel_init();
1130         if (ret)
1131                 return ret;
1132
1133         ret = rc80211_minstrel_ht_init();
1134         if (ret)
1135                 goto err_minstrel;
1136
1137         ret = rc80211_pid_init();
1138         if (ret)
1139                 goto err_pid;
1140
1141         ret = ieee80211_iface_init();
1142         if (ret)
1143                 goto err_netdev;
1144
1145         return 0;
1146  err_netdev:
1147         rc80211_pid_exit();
1148  err_pid:
1149         rc80211_minstrel_ht_exit();
1150  err_minstrel:
1151         rc80211_minstrel_exit();
1152
1153         return ret;
1154 }
1155
1156 static void __exit ieee80211_exit(void)
1157 {
1158         rc80211_pid_exit();
1159         rc80211_minstrel_ht_exit();
1160         rc80211_minstrel_exit();
1161
1162         ieee80211s_stop();
1163
1164         ieee80211_iface_exit();
1165
1166         rcu_barrier();
1167 }
1168
1169
1170 subsys_initcall(ieee80211_init);
1171 module_exit(ieee80211_exit);
1172
1173 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1174 MODULE_LICENSE("GPL");