net/mac80211/main.c

   1 /*
   2  * Copyright 2002-2005, Instant802 Networks, Inc.
   3  * Copyright 2005-2006, Devicescape Software, Inc.
   4  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 #include <net/mac80211.h>
  12 #include <linux/module.h>
  13 #include <linux/init.h>
  14 #include <linux/netdevice.h>
  15 #include <linux/types.h>
  16 #include <linux/slab.h>
  17 #include <linux/skbuff.h>
  18 #include <linux/etherdevice.h>
  19 #include <linux/if_arp.h>
  20 #include <linux/rtnetlink.h>
  21 #include <linux/bitmap.h>
  22 #include <linux/pm_qos.h>
  23 #include <linux/inetdevice.h>
  24 #include <net/net_namespace.h>
  25 #include <net/cfg80211.h>
  26 #include <net/addrconf.h>
  27
  28 #include "ieee80211_i.h"
  29 #include "driver-ops.h"
  30 #include "rate.h"
  31 #include "mesh.h"
  32 #include "wep.h"
  33 #include "led.h"
  34 #include "cfg.h"
  35 #include "debugfs.h"
  36
  37 void ieee80211_configure_filter(struct ieee80211_local *local)
  38 {
  39         u64 mc;
  40         unsigned int changed_flags;
  41         unsigned int new_flags = 0;
  42
  43         if (atomic_read(&local->iff_promiscs))
  44                 new_flags |= FIF_PROMISC_IN_BSS;
  45
  46         if (atomic_read(&local->iff_allmultis))
  47                 new_flags |= FIF_ALLMULTI;
  48
  49         if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) ||
  50             test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning))
  51                 new_flags |= FIF_BCN_PRBRESP_PROMISC;
  52
  53         if (local->fif_probe_req || local->probe_req_reg)
  54                 new_flags |= FIF_PROBE_REQ;
  55
  56         if (local->fif_fcsfail)
  57                 new_flags |= FIF_FCSFAIL;
  58
  59         if (local->fif_plcpfail)
  60                 new_flags |= FIF_PLCPFAIL;
  61
  62         if (local->fif_control)
  63                 new_flags |= FIF_CONTROL;
  64
  65         if (local->fif_other_bss)
  66                 new_flags |= FIF_OTHER_BSS;
  67
  68         if (local->fif_pspoll)
  69                 new_flags |= FIF_PSPOLL;
  70
  71         spin_lock_bh(&local->filter_lock);
  72         changed_flags = local->filter_flags ^ new_flags;
  73
  74         mc = drv_prepare_multicast(local, &local->mc_list);
  75         spin_unlock_bh(&local->filter_lock);
  76
  77         /* be a bit nasty */
  78         new_flags |= (1<<31);
  79
  80         drv_configure_filter(local, changed_flags, &new_flags, mc);
  81
  82         WARN_ON(new_flags & (1<<31));
  83
  84         local->filter_flags = new_flags & ~(1<<31);
  85 }
  86
  87 static void ieee80211_reconfig_filter(struct work_struct *work)
  88 {
  89         struct ieee80211_local *local =
  90                 container_of(work, struct ieee80211_local, reconfig_filter);
  91
  92         ieee80211_configure_filter(local);
  93 }
  94
  95 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
  96 {
  97         struct ieee80211_sub_if_data *sdata;
  98         struct cfg80211_chan_def chandef = {};
  99         u32 changed = 0;
 100         int power;
 101         u32 offchannel_flag;
 102
 103         offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
 104
 105         if (local->scan_chandef.chan) {
 106                 chandef = local->scan_chandef;
 107         } else if (local->tmp_channel) {
 108                 chandef.chan = local->tmp_channel;
 109                 chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
 110                 chandef.center_freq1 = chandef.chan->center_freq;
 111         } else
 112                 chandef = local->_oper_chandef;
 113
 114         WARN(!cfg80211_chandef_valid(&chandef),
 115              "control:%d MHz width:%d center: %d/%d MHz",
 116              chandef.chan->center_freq, chandef.width,
 117              chandef.center_freq1, chandef.center_freq2);
 118
 119         if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef))
 120                 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
 121         else
 122                 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
 123
 124         offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
 125
 126         if (offchannel_flag ||
 127             !cfg80211_chandef_identical(&local->hw.conf.chandef,
 128                                         &local->_oper_chandef)) {
 129                 local->hw.conf.chandef = chandef;
 130                 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
 131         }
 132
 133         if (!conf_is_ht(&local->hw.conf)) {
 134                 /*
 135                  * mac80211.h documents that this is only valid
 136                  * when the channel is set to an HT type, and
 137                  * that otherwise STATIC is used.
 138                  */
 139                 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
 140         } else if (local->hw.conf.smps_mode != local->smps_mode) {
 141                 local->hw.conf.smps_mode = local->smps_mode;
 142                 changed |= IEEE80211_CONF_CHANGE_SMPS;
 143         }
 144
 145         power = ieee80211_chandef_max_power(&chandef);
 146
 147         rcu_read_lock();
 148         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 149                 if (!rcu_access_pointer(sdata->vif.chanctx_conf))
 150                         continue;
 151                 power = min(power, sdata->vif.bss_conf.txpower);
 152         }
 153         rcu_read_unlock();
 154
 155         if (local->hw.conf.power_level != power) {
 156                 changed |= IEEE80211_CONF_CHANGE_POWER;
 157                 local->hw.conf.power_level = power;
 158         }
 159
 160         return changed;
 161 }
 162
 163 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
 164 {
 165         int ret = 0;
 166
 167         might_sleep();
 168
 169         if (!local->use_chanctx)
 170                 changed |= ieee80211_hw_conf_chan(local);
 171         else
 172                 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
 173                              IEEE80211_CONF_CHANGE_POWER);
 174
 175         if (changed && local->open_count) {
 176                 ret = drv_config(local, changed);
 177                 /*
 178                  * Goal:
 179                  * HW reconfiguration should never fail, the driver has told
 180                  * us what it can support so it should live up to that promise.
 181                  *
 182                  * Current status:
 183                  * rfkill is not integrated with mac80211 and a
 184                  * configuration command can thus fail if hardware rfkill
 185                  * is enabled
 186                  *
 187                  * FIXME: integrate rfkill with mac80211 and then add this
 188                  * WARN_ON() back
 189                  *
 190                  */
 191                 /* WARN_ON(ret); */
 192         }
 193
 194         return ret;
 195 }
 196
 197 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
 198                                       u32 changed)
 199 {
 200         struct ieee80211_local *local = sdata->local;
 201
 202         if (!changed)
 203                 return;
 204
 205         drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
 206 }
 207
 208 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
 209 {
 210         sdata->vif.bss_conf.use_cts_prot = false;
 211         sdata->vif.bss_conf.use_short_preamble = false;
 212         sdata->vif.bss_conf.use_short_slot = false;
 213         return BSS_CHANGED_ERP_CTS_PROT |
 214                BSS_CHANGED_ERP_PREAMBLE |
 215                BSS_CHANGED_ERP_SLOT;
 216 }
 217
 218 static void ieee80211_tasklet_handler(unsigned long data)
 219 {
 220         struct ieee80211_local *local = (struct ieee80211_local *) data;
 221         struct sk_buff *skb;
 222
 223         while ((skb = skb_dequeue(&local->skb_queue)) ||
 224                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
 225                 switch (skb->pkt_type) {
 226                 case IEEE80211_RX_MSG:
 227                         /* Clear skb->pkt_type in order to not confuse kernel
 228                          * netstack. */
 229                         skb->pkt_type = 0;
 230                         ieee80211_rx(&local->hw, skb);
 231                         break;
 232                 case IEEE80211_TX_STATUS_MSG:
 233                         skb->pkt_type = 0;
 234                         ieee80211_tx_status(&local->hw, skb);
 235                         break;
 236                 default:
 237                         WARN(1, "mac80211: Packet is of unknown type %d\n",
 238                              skb->pkt_type);
 239                         dev_kfree_skb(skb);
 240                         break;
 241                 }
 242         }
 243 }
 244
 245 static void ieee80211_restart_work(struct work_struct *work)
 246 {
 247         struct ieee80211_local *local =
 248                 container_of(work, struct ieee80211_local, restart_work);
 249
 250         /* wait for scan work complete */
 251         flush_workqueue(local->workqueue);
 252
 253         WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
 254              "%s called with hardware scan in progress\n", __func__);
 255
 256         rtnl_lock();
 257         ieee80211_scan_cancel(local);
 258         ieee80211_reconfig(local);
 259         rtnl_unlock();
 260 }
 261
 262 void ieee80211_restart_hw(struct ieee80211_hw *hw)
 263 {
 264         struct ieee80211_local *local = hw_to_local(hw);
 265
 266         trace_api_restart_hw(local);
 267
 268         wiphy_info(hw->wiphy,
 269                    "Hardware restart was requested\n");
 270
 271         /* use this reason, ieee80211_reconfig will unblock it */
 272         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 273                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND);
 274
 275         /*
 276          * Stop all Rx during the reconfig. We don't want state changes
 277          * or driver callbacks while this is in progress.
 278          */
 279         local->in_reconfig = true;
 280         barrier();
 281
 282         schedule_work(&local->restart_work);
 283 }
 284 EXPORT_SYMBOL(ieee80211_restart_hw);
 285
 286 #ifdef CONFIG_INET
 287 static int ieee80211_ifa_changed(struct notifier_block *nb,
 288                                  unsigned long data, void *arg)
 289 {
 290         struct in_ifaddr *ifa = arg;
 291         struct ieee80211_local *local =
 292                 container_of(nb, struct ieee80211_local,
 293                              ifa_notifier);
 294         struct net_device *ndev = ifa->ifa_dev->dev;
 295         struct wireless_dev *wdev = ndev->ieee80211_ptr;
 296         struct in_device *idev;
 297         struct ieee80211_sub_if_data *sdata;
 298         struct ieee80211_bss_conf *bss_conf;
 299         struct ieee80211_if_managed *ifmgd;
 300         int c = 0;
 301
 302         /* Make sure it's our interface that got changed */
 303         if (!wdev)
 304                 return NOTIFY_DONE;
 305
 306         if (wdev->wiphy != local->hw.wiphy)
 307                 return NOTIFY_DONE;
 308
 309         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
 310         bss_conf = &sdata->vif.bss_conf;
 311
 312         /* ARP filtering is only supported in managed mode */
 313         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 314                 return NOTIFY_DONE;
 315
 316         idev = __in_dev_get_rtnl(sdata->dev);
 317         if (!idev)
 318                 return NOTIFY_DONE;
 319
 320         ifmgd = &sdata->u.mgd;
 321         sdata_lock(sdata);
 322
 323         /* Copy the addresses to the bss_conf list */
 324         ifa = idev->ifa_list;
 325         while (ifa) {
 326                 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
 327                         bss_conf->arp_addr_list[c] = ifa->ifa_address;
 328                 ifa = ifa->ifa_next;
 329                 c++;
 330         }
 331
 332         bss_conf->arp_addr_cnt = c;
 333
 334         /* Configure driver only if associated (which also implies it is up) */
 335         if (ifmgd->associated)
 336                 ieee80211_bss_info_change_notify(sdata,
 337                                                  BSS_CHANGED_ARP_FILTER);
 338
 339         sdata_unlock(sdata);
 340
 341         return NOTIFY_DONE;
 342 }
 343 #endif
 344
 345 #if IS_ENABLED(CONFIG_IPV6)
 346 static int ieee80211_ifa6_changed(struct notifier_block *nb,
 347                                   unsigned long data, void *arg)
 348 {
 349         struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
 350         struct inet6_dev *idev = ifa->idev;
 351         struct net_device *ndev = ifa->idev->dev;
 352         struct ieee80211_local *local =
 353                 container_of(nb, struct ieee80211_local, ifa6_notifier);
 354         struct wireless_dev *wdev = ndev->ieee80211_ptr;
 355         struct ieee80211_sub_if_data *sdata;
 356
 357         /* Make sure it's our interface that got changed */
 358         if (!wdev || wdev->wiphy != local->hw.wiphy)
 359                 return NOTIFY_DONE;
 360
 361         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
 362
 363         /*
 364          * For now only support station mode. This is mostly because
 365          * doing AP would have to handle AP_VLAN in some way ...
 366          */
 367         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 368                 return NOTIFY_DONE;
 369
 370         drv_ipv6_addr_change(local, sdata, idev);
 371
 372         return NOTIFY_DONE;
 373 }
 374 #endif
 375
 376 /* There isn't a lot of sense in it, but you can transmit anything you like */
 377 static const struct ieee80211_txrx_stypes
 378 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
 379         [NL80211_IFTYPE_ADHOC] = {
 380                 .tx = 0xffff,
 381                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 382                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 383                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 384                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 385         },
 386         [NL80211_IFTYPE_STATION] = {
 387                 .tx = 0xffff,
 388                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 389                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 390         },
 391         [NL80211_IFTYPE_AP] = {
 392                 .tx = 0xffff,
 393                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 394                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 395                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 396                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 397                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 398                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 399                         BIT(IEEE80211_STYPE_ACTION >> 4),
 400         },
 401         [NL80211_IFTYPE_AP_VLAN] = {
 402                 /* copy AP */
 403                 .tx = 0xffff,
 404                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 405                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 406                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 407                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 408                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 409                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 410                         BIT(IEEE80211_STYPE_ACTION >> 4),
 411         },
 412         [NL80211_IFTYPE_P2P_CLIENT] = {
 413                 .tx = 0xffff,
 414                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 415                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 416         },
 417         [NL80211_IFTYPE_P2P_GO] = {
 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_MESH_POINT] = {
 428                 .tx = 0xffff,
 429                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 430                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 431                         BIT(IEEE80211_STYPE_DEAUTH >> 4),
 432         },
 433         [NL80211_IFTYPE_P2P_DEVICE] = {
 434                 .tx = 0xffff,
 435                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 436                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 437         },
 438 };
 439
 440 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
 441         .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
 442                              IEEE80211_HT_AMPDU_PARM_DENSITY,
 443
 444         .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
 445                                 IEEE80211_HT_CAP_MAX_AMSDU |
 446                                 IEEE80211_HT_CAP_SGI_20 |
 447                                 IEEE80211_HT_CAP_SGI_40),
 448         .mcs = {
 449                 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
 450                              0xff, 0xff, 0xff, 0xff, 0xff, },
 451         },
 452 };
 453
 454 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
 455         .vht_cap_info =
 456                 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
 457                             IEEE80211_VHT_CAP_SHORT_GI_80 |
 458                             IEEE80211_VHT_CAP_SHORT_GI_160 |
 459                             IEEE80211_VHT_CAP_RXSTBC_1 |
 460                             IEEE80211_VHT_CAP_RXSTBC_2 |
 461                             IEEE80211_VHT_CAP_RXSTBC_3 |
 462                             IEEE80211_VHT_CAP_RXSTBC_4 |
 463                             IEEE80211_VHT_CAP_TXSTBC |
 464                             IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
 465                             IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
 466                             IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
 467                             IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
 468                             IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
 469         .supp_mcs = {
 470                 .rx_mcs_map = cpu_to_le16(~0),
 471                 .tx_mcs_map = cpu_to_le16(~0),
 472         },
 473 };
 474
 475 static const u8 extended_capabilities[] = {
 476         0, 0, 0, 0, 0, 0, 0,
 477         WLAN_EXT_CAPA8_OPMODE_NOTIF,
 478 };
 479
 480 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
 481                                         const struct ieee80211_ops *ops)
 482 {
 483         struct ieee80211_local *local;
 484         int priv_size, i;
 485         struct wiphy *wiphy;
 486         bool use_chanctx;
 487
 488         if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
 489                     !ops->add_interface || !ops->remove_interface ||
 490                     !ops->configure_filter))
 491                 return NULL;
 492
 493         if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
 494                 return NULL;
 495
 496         /* check all or no channel context operations exist */
 497         i = !!ops->add_chanctx + !!ops->remove_chanctx +
 498             !!ops->change_chanctx + !!ops->assign_vif_chanctx +
 499             !!ops->unassign_vif_chanctx;
 500         if (WARN_ON(i != 0 && i != 5))
 501                 return NULL;
 502         use_chanctx = i == 5;
 503
 504         /* Ensure 32-byte alignment of our private data and hw private data.
 505          * We use the wiphy priv data for both our ieee80211_local and for
 506          * the driver's private data
 507          *
 508          * In memory it'll be like this:
 509          *
 510          * +-------------------------+
 511          * | struct wiphy           |
 512          * +-------------------------+
 513          * | struct ieee80211_local  |
 514          * +-------------------------+
 515          * | driver's private data   |
 516          * +-------------------------+
 517          *
 518          */
 519         priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
 520
 521         wiphy = wiphy_new(&mac80211_config_ops, priv_size);
 522
 523         if (!wiphy)
 524                 return NULL;
 525
 526         wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
 527
 528         wiphy->privid = mac80211_wiphy_privid;
 529
 530         wiphy->flags |= WIPHY_FLAG_NETNS_OK |
 531                         WIPHY_FLAG_4ADDR_AP |
 532                         WIPHY_FLAG_4ADDR_STATION |
 533                         WIPHY_FLAG_REPORTS_OBSS |
 534                         WIPHY_FLAG_OFFCHAN_TX;
 535
 536         wiphy->extended_capabilities = extended_capabilities;
 537         wiphy->extended_capabilities_mask = extended_capabilities;
 538         wiphy->extended_capabilities_len = ARRAY_SIZE(extended_capabilities);
 539
 540         if (ops->remain_on_channel)
 541                 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
 542
 543         wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
 544                            NL80211_FEATURE_SAE |
 545                            NL80211_FEATURE_HT_IBSS |
 546                            NL80211_FEATURE_VIF_TXPOWER |
 547                            NL80211_FEATURE_USERSPACE_MPM;
 548
 549         if (!ops->hw_scan)
 550                 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
 551                                    NL80211_FEATURE_AP_SCAN;
 552
 553
 554         if (!ops->set_key)
 555                 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 556
 557         wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
 558
 559         local = wiphy_priv(wiphy);
 560
 561         local->hw.wiphy = wiphy;
 562
 563         local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
 564
 565         local->ops = ops;
 566         local->use_chanctx = use_chanctx;
 567
 568         /* set up some defaults */
 569         local->hw.queues = 1;
 570         local->hw.max_rates = 1;
 571         local->hw.max_report_rates = 0;
 572         local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
 573         local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
 574         local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
 575         local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
 576         local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
 577         local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
 578                                          IEEE80211_RADIOTAP_MCS_HAVE_GI |
 579                                          IEEE80211_RADIOTAP_MCS_HAVE_BW;
 580         local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
 581                                          IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
 582         local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
 583         local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
 584         local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
 585         wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
 586         wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
 587
 588         INIT_LIST_HEAD(&local->interfaces);
 589
 590         __hw_addr_init(&local->mc_list);
 591
 592         mutex_init(&local->iflist_mtx);
 593         mutex_init(&local->mtx);
 594
 595         mutex_init(&local->key_mtx);
 596         spin_lock_init(&local->filter_lock);
 597         spin_lock_init(&local->rx_path_lock);
 598         spin_lock_init(&local->queue_stop_reason_lock);
 599
 600         INIT_LIST_HEAD(&local->chanctx_list);
 601         mutex_init(&local->chanctx_mtx);
 602
 603         INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
 604
 605         INIT_WORK(&local->restart_work, ieee80211_restart_work);
 606
 607         INIT_WORK(&local->radar_detected_work,
 608                   ieee80211_dfs_radar_detected_work);
 609
 610         INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
 611         local->smps_mode = IEEE80211_SMPS_OFF;
 612
 613         INIT_WORK(&local->dynamic_ps_enable_work,
 614                   ieee80211_dynamic_ps_enable_work);
 615         INIT_WORK(&local->dynamic_ps_disable_work,
 616                   ieee80211_dynamic_ps_disable_work);
 617         setup_timer(&local->dynamic_ps_timer,
 618                     ieee80211_dynamic_ps_timer, (unsigned long) local);
 619
 620         INIT_WORK(&local->sched_scan_stopped_work,
 621                   ieee80211_sched_scan_stopped_work);
 622
 623         spin_lock_init(&local->ack_status_lock);
 624         idr_init(&local->ack_status_frames);
 625
 626         sta_info_init(local);
 627
 628         for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
 629                 skb_queue_head_init(&local->pending[i]);
 630                 atomic_set(&local->agg_queue_stop[i], 0);
 631         }
 632         tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
 633                      (unsigned long)local);
 634
 635         tasklet_init(&local->tasklet,
 636                      ieee80211_tasklet_handler,
 637                      (unsigned long) local);
 638
 639         skb_queue_head_init(&local->skb_queue);
 640         skb_queue_head_init(&local->skb_queue_unreliable);
 641
 642         ieee80211_led_names(local);
 643
 644         ieee80211_roc_setup(local);
 645
 646         return &local->hw;
 647 }
 648 EXPORT_SYMBOL(ieee80211_alloc_hw);
 649
 650 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
 651 {
 652         bool have_wep = !(IS_ERR(local->wep_tx_tfm) ||
 653                           IS_ERR(local->wep_rx_tfm));
 654         bool have_mfp = local->hw.flags & IEEE80211_HW_MFP_CAPABLE;
 655         const struct ieee80211_cipher_scheme *cs = local->hw.cipher_schemes;
 656         int n_suites = 0, r = 0, w = 0;
 657         u32 *suites;
 658         static const u32 cipher_suites[] = {
 659                 /* keep WEP first, it may be removed below */
 660                 WLAN_CIPHER_SUITE_WEP40,
 661                 WLAN_CIPHER_SUITE_WEP104,
 662                 WLAN_CIPHER_SUITE_TKIP,
 663                 WLAN_CIPHER_SUITE_CCMP,
 664
 665                 /* keep last -- depends on hw flags! */
 666                 WLAN_CIPHER_SUITE_AES_CMAC
 667         };
 668
 669         /* Driver specifies the ciphers, we have nothing to do... */
 670         if (local->hw.wiphy->cipher_suites && have_wep)
 671                 return 0;
 672
 673         /* Set up cipher suites if driver relies on mac80211 cipher defs */
 674         if (!local->hw.wiphy->cipher_suites && !cs) {
 675                 local->hw.wiphy->cipher_suites = cipher_suites;
 676                 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
 677
 678                 if (!have_mfp)
 679                         local->hw.wiphy->n_cipher_suites--;
 680
 681                 if (!have_wep) {
 682                         local->hw.wiphy->cipher_suites += 2;
 683                         local->hw.wiphy->n_cipher_suites -= 2;
 684                 }
 685
 686                 return 0;
 687         }
 688
 689         if (!local->hw.wiphy->cipher_suites) {
 690                 /*
 691                  * Driver specifies cipher schemes only
 692                  * We start counting ciphers defined by schemes, TKIP and CCMP
 693                  */
 694                 n_suites = local->hw.n_cipher_schemes + 2;
 695
 696                 /* check if we have WEP40 and WEP104 */
 697                 if (have_wep)
 698                         n_suites += 2;
 699
 700                 /* check if we have AES_CMAC */
 701                 if (have_mfp)
 702                         n_suites++;
 703
 704                 suites = kmalloc(sizeof(u32) * n_suites, GFP_KERNEL);
 705                 if (!suites)
 706                         return -ENOMEM;
 707
 708                 suites[w++] = WLAN_CIPHER_SUITE_CCMP;
 709                 suites[w++] = WLAN_CIPHER_SUITE_TKIP;
 710
 711                 if (have_wep) {
 712                         suites[w++] = WLAN_CIPHER_SUITE_WEP40;
 713                         suites[w++] = WLAN_CIPHER_SUITE_WEP104;
 714                 }
 715
 716                 if (have_mfp)
 717                         suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC;
 718
 719                 for (r = 0; r < local->hw.n_cipher_schemes; r++)
 720                         suites[w++] = cs[r].cipher;
 721         } else {
 722                 /* Driver provides cipher suites, but we need to exclude WEP */
 723                 suites = kmemdup(local->hw.wiphy->cipher_suites,
 724                                  sizeof(u32) * local->hw.wiphy->n_cipher_suites,
 725                                  GFP_KERNEL);
 726                 if (!suites)
 727                         return -ENOMEM;
 728
 729                 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
 730                         u32 suite = local->hw.wiphy->cipher_suites[r];
 731
 732                         if (suite == WLAN_CIPHER_SUITE_WEP40 ||
 733                             suite == WLAN_CIPHER_SUITE_WEP104)
 734                                 continue;
 735                         suites[w++] = suite;
 736                 }
 737         }
 738
 739         local->hw.wiphy->cipher_suites = suites;
 740         local->hw.wiphy->n_cipher_suites = w;
 741         local->wiphy_ciphers_allocated = true;
 742
 743         return 0;
 744 }
 745
 746 int ieee80211_register_hw(struct ieee80211_hw *hw)
 747 {
 748         struct ieee80211_local *local = hw_to_local(hw);
 749         int result, i;
 750         enum ieee80211_band band;
 751         int channels, max_bitrates;
 752         bool supp_ht, supp_vht;
 753         netdev_features_t feature_whitelist;
 754         struct cfg80211_chan_def dflt_chandef = {};
 755
 756         if (hw->flags & IEEE80211_HW_QUEUE_CONTROL &&
 757             (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
 758              local->hw.offchannel_tx_hw_queue >= local->hw.queues))
 759                 return -EINVAL;
 760
 761 #ifdef CONFIG_PM
 762         if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
 763                 return -EINVAL;
 764 #endif
 765
 766         if (!local->use_chanctx) {
 767                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
 768                         const struct ieee80211_iface_combination *comb;
 769
 770                         comb = &local->hw.wiphy->iface_combinations[i];
 771
 772                         if (comb->num_different_channels > 1)
 773                                 return -EINVAL;
 774                 }
 775         } else {
 776                 /*
 777                  * WDS is currently prohibited when channel contexts are used
 778                  * because there's no clear definition of which channel WDS
 779                  * type interfaces use
 780                  */
 781                 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
 782                         return -EINVAL;
 783
 784                 /* DFS currently not supported with channel context drivers */
 785                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
 786                         const struct ieee80211_iface_combination *comb;
 787
 788                         comb = &local->hw.wiphy->iface_combinations[i];
 789
 790                         if (comb->radar_detect_widths)
 791                                 return -EINVAL;
 792                 }
 793         }
 794
 795         /* Only HW csum features are currently compatible with mac80211 */
 796         feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
 797                             NETIF_F_HW_CSUM;
 798         if (WARN_ON(hw->netdev_features & ~feature_whitelist))
 799                 return -EINVAL;
 800
 801         if (hw->max_report_rates == 0)
 802                 hw->max_report_rates = hw->max_rates;
 803
 804         local->rx_chains = 1;
 805
 806         /*
 807          * generic code guarantees at least one band,
 808          * set this very early because much code assumes
 809          * that hw.conf.channel is assigned
 810          */
 811         channels = 0;
 812         max_bitrates = 0;
 813         supp_ht = false;
 814         supp_vht = false;
 815         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 816                 struct ieee80211_supported_band *sband;
 817
 818                 sband = local->hw.wiphy->bands[band];
 819                 if (!sband)
 820                         continue;
 821
 822                 if (!dflt_chandef.chan) {
 823                         cfg80211_chandef_create(&dflt_chandef,
 824                                                 &sband->channels[0],
 825                                                 NL80211_CHAN_NO_HT);
 826                         /* init channel we're on */
 827                         if (!local->use_chanctx && !local->_oper_chandef.chan) {
 828                                 local->hw.conf.chandef = dflt_chandef;
 829                                 local->_oper_chandef = dflt_chandef;
 830                         }
 831                         local->monitor_chandef = dflt_chandef;
 832                 }
 833
 834                 channels += sband->n_channels;
 835
 836                 if (max_bitrates < sband->n_bitrates)
 837                         max_bitrates = sband->n_bitrates;
 838                 supp_ht = supp_ht || sband->ht_cap.ht_supported;
 839                 supp_vht = supp_vht || sband->vht_cap.vht_supported;
 840
 841                 if (sband->ht_cap.ht_supported)
 842                         local->rx_chains =
 843                                 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
 844                                     local->rx_chains);
 845
 846                 /* TODO: consider VHT for RX chains, hopefully it's the same */
 847         }
 848
 849         /* if low-level driver supports AP, we also support VLAN */
 850         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
 851                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
 852                 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
 853         }
 854
 855         /* mac80211 always supports monitor */
 856         hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
 857         hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
 858
 859         /* mac80211 doesn't support more than one IBSS interface right now */
 860         for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
 861                 const struct ieee80211_iface_combination *c;
 862                 int j;
 863
 864                 c = &hw->wiphy->iface_combinations[i];
 865
 866                 for (j = 0; j < c->n_limits; j++)
 867                         if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
 868                             c->limits[j].max > 1)
 869                                 return -EINVAL;
 870         }
 871
 872         local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
 873                                       sizeof(void *) * channels, GFP_KERNEL);
 874         if (!local->int_scan_req)
 875                 return -ENOMEM;
 876
 877         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 878                 if (!local->hw.wiphy->bands[band])
 879                         continue;
 880                 local->int_scan_req->rates[band] = (u32) -1;
 881         }
 882
 883 #ifndef CONFIG_MAC80211_MESH
 884         /* mesh depends on Kconfig, but drivers should set it if they want */
 885         local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
 886 #endif
 887
 888         /* if the underlying driver supports mesh, mac80211 will (at least)
 889          * provide routing of mesh authentication frames to userspace */
 890         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
 891                 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
 892
 893         /* mac80211 supports control port protocol changing */
 894         local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
 895
 896         if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) {
 897                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
 898         } else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC) {
 899                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
 900                 if (hw->max_signal <= 0) {
 901                         result = -EINVAL;
 902                         goto fail_wiphy_register;
 903                 }
 904         }
 905
 906         WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)
 907              && (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK),
 908              "U-APSD not supported with HW_PS_NULLFUNC_STACK\n");
 909
 910         /*
 911          * Calculate scan IE length -- we need this to alloc
 912          * memory and to subtract from the driver limit. It
 913          * includes the DS Params, (extended) supported rates, and HT
 914          * information -- SSID is the driver's responsibility.
 915          */
 916         local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
 917                 3 /* DS Params */;
 918         if (supp_ht)
 919                 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
 920
 921         if (supp_vht)
 922                 local->scan_ies_len +=
 923                         2 + sizeof(struct ieee80211_vht_cap);
 924
 925         if (!local->ops->hw_scan) {
 926                 /* For hw_scan, driver needs to set these up. */
 927                 local->hw.wiphy->max_scan_ssids = 4;
 928                 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
 929         }
 930
 931         /*
 932          * If the driver supports any scan IEs, then assume the
 933          * limit includes the IEs mac80211 will add, otherwise
 934          * leave it at zero and let the driver sort it out; we
 935          * still pass our IEs to the driver but userspace will
 936          * not be allowed to in that case.
 937          */
 938         if (local->hw.wiphy->max_scan_ie_len)
 939                 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
 940
 941         WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes,
 942                                          local->hw.n_cipher_schemes));
 943
 944         result = ieee80211_init_cipher_suites(local);
 945         if (result < 0)
 946                 goto fail_wiphy_register;
 947
 948         if (!local->ops->remain_on_channel)
 949                 local->hw.wiphy->max_remain_on_channel_duration = 5000;
 950
 951         /* mac80211 based drivers don't support internal TDLS setup */
 952         if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
 953                 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
 954
 955         result = wiphy_register(local->hw.wiphy);
 956         if (result < 0)
 957                 goto fail_wiphy_register;
 958
 959         /*
 960          * We use the number of queues for feature tests (QoS, HT) internally
 961          * so restrict them appropriately.
 962          */
 963         if (hw->queues > IEEE80211_MAX_QUEUES)
 964                 hw->queues = IEEE80211_MAX_QUEUES;
 965
 966         local->workqueue =
 967                 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
 968         if (!local->workqueue) {
 969                 result = -ENOMEM;
 970                 goto fail_workqueue;
 971         }
 972
 973         /*
 974          * The hardware needs headroom for sending the frame,
 975          * and we need some headroom for passing the frame to monitor
 976          * interfaces, but never both at the same time.
 977          */
 978         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
 979                                    IEEE80211_TX_STATUS_HEADROOM);
 980
 981         debugfs_hw_add(local);
 982
 983         /*
 984          * if the driver doesn't specify a max listen interval we
 985          * use 5 which should be a safe default
 986          */
 987         if (local->hw.max_listen_interval == 0)
 988                 local->hw.max_listen_interval = 5;
 989
 990         local->hw.conf.listen_interval = local->hw.max_listen_interval;
 991
 992         local->dynamic_ps_forced_timeout = -1;
 993
 994         result = ieee80211_wep_init(local);
 995         if (result < 0)
 996                 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
 997                             result);
 998
 999         local->hw.conf.flags = IEEE80211_CONF_IDLE;
1000
1001         ieee80211_led_init(local);
1002
1003         rtnl_lock();
1004
1005         result = ieee80211_init_rate_ctrl_alg(local,
1006                                               hw->rate_control_algorithm);
1007         if (result < 0) {
1008                 wiphy_debug(local->hw.wiphy,
1009                             "Failed to initialize rate control algorithm\n");
1010                 goto fail_rate;
1011         }
1012
1013         /* add one default STA interface if supported */
1014         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) {
1015                 result = ieee80211_if_add(local, "wlan%d", NULL,
1016                                           NL80211_IFTYPE_STATION, NULL);
1017                 if (result)
1018                         wiphy_warn(local->hw.wiphy,
1019                                    "Failed to add default virtual iface\n");
1020         }
1021
1022         rtnl_unlock();
1023
1024         local->network_latency_notifier.notifier_call =
1025                 ieee80211_max_network_latency;
1026         result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY,
1027                                      &local->network_latency_notifier);
1028         if (result) {
1029                 rtnl_lock();
1030                 goto fail_pm_qos;
1031         }
1032
1033 #ifdef CONFIG_INET
1034         local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1035         result = register_inetaddr_notifier(&local->ifa_notifier);
1036         if (result)
1037                 goto fail_ifa;
1038 #endif
1039
1040 #if IS_ENABLED(CONFIG_IPV6)
1041         local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1042         result = register_inet6addr_notifier(&local->ifa6_notifier);
1043         if (result)
1044                 goto fail_ifa6;
1045 #endif
1046
1047         return 0;
1048
1049 #if IS_ENABLED(CONFIG_IPV6)
1050  fail_ifa6:
1051 #ifdef CONFIG_INET
1052         unregister_inetaddr_notifier(&local->ifa_notifier);
1053 #endif
1054 #endif
1055 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1056  fail_ifa:
1057         pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1058                                &local->network_latency_notifier);
1059         rtnl_lock();
1060 #endif
1061  fail_pm_qos:
1062         ieee80211_led_exit(local);
1063         ieee80211_remove_interfaces(local);
1064  fail_rate:
1065         rtnl_unlock();
1066         ieee80211_wep_free(local);
1067         sta_info_stop(local);
1068         destroy_workqueue(local->workqueue);
1069  fail_workqueue:
1070         wiphy_unregister(local->hw.wiphy);
1071  fail_wiphy_register:
1072         if (local->wiphy_ciphers_allocated)
1073                 kfree(local->hw.wiphy->cipher_suites);
1074         kfree(local->int_scan_req);
1075         return result;
1076 }
1077 EXPORT_SYMBOL(ieee80211_register_hw);
1078
1079 void ieee80211_napi_add(struct ieee80211_hw *hw, struct napi_struct *napi,
1080                         struct net_device *napi_dev,
1081                         int (*poll)(struct napi_struct *, int),
1082                         int weight)
1083 {
1084         struct ieee80211_local *local = hw_to_local(hw);
1085
1086         netif_napi_add(napi_dev, napi, poll, weight);
1087         local->napi = napi;
1088 }
1089 EXPORT_SYMBOL_GPL(ieee80211_napi_add);
1090
1091 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1092 {
1093         struct ieee80211_local *local = hw_to_local(hw);
1094
1095         tasklet_kill(&local->tx_pending_tasklet);
1096         tasklet_kill(&local->tasklet);
1097
1098         pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1099                                &local->network_latency_notifier);
1100 #ifdef CONFIG_INET
1101         unregister_inetaddr_notifier(&local->ifa_notifier);
1102 #endif
1103 #if IS_ENABLED(CONFIG_IPV6)
1104         unregister_inet6addr_notifier(&local->ifa6_notifier);
1105 #endif
1106
1107         rtnl_lock();
1108
1109         /*
1110          * At this point, interface list manipulations are fine
1111          * because the driver cannot be handing us frames any
1112          * more and the tasklet is killed.
1113          */
1114         ieee80211_remove_interfaces(local);
1115
1116         rtnl_unlock();
1117
1118         cancel_work_sync(&local->restart_work);
1119         cancel_work_sync(&local->reconfig_filter);
1120         flush_work(&local->sched_scan_stopped_work);
1121
1122         ieee80211_clear_tx_pending(local);
1123         rate_control_deinitialize(local);
1124
1125         if (skb_queue_len(&local->skb_queue) ||
1126             skb_queue_len(&local->skb_queue_unreliable))
1127                 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1128         skb_queue_purge(&local->skb_queue);
1129         skb_queue_purge(&local->skb_queue_unreliable);
1130
1131         destroy_workqueue(local->workqueue);
1132         wiphy_unregister(local->hw.wiphy);
1133         sta_info_stop(local);
1134         ieee80211_wep_free(local);
1135         ieee80211_led_exit(local);
1136         kfree(local->int_scan_req);
1137 }
1138 EXPORT_SYMBOL(ieee80211_unregister_hw);
1139
1140 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1141 {
1142         WARN_ONCE(1, "Have pending ack frames!\n");
1143         kfree_skb(p);
1144         return 0;
1145 }
1146
1147 void ieee80211_free_hw(struct ieee80211_hw *hw)
1148 {
1149         struct ieee80211_local *local = hw_to_local(hw);
1150
1151         mutex_destroy(&local->iflist_mtx);
1152         mutex_destroy(&local->mtx);
1153
1154         if (local->wiphy_ciphers_allocated)
1155                 kfree(local->hw.wiphy->cipher_suites);
1156
1157         idr_for_each(&local->ack_status_frames,
1158                      ieee80211_free_ack_frame, NULL);
1159         idr_destroy(&local->ack_status_frames);
1160
1161         kfree(rcu_access_pointer(local->tx_latency));
1162
1163         wiphy_free(local->hw.wiphy);
1164 }
1165 EXPORT_SYMBOL(ieee80211_free_hw);
1166
1167 static int __init ieee80211_init(void)
1168 {
1169         struct sk_buff *skb;
1170         int ret;
1171
1172         BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1173         BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1174                      IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1175
1176         ret = rc80211_minstrel_init();
1177         if (ret)
1178                 return ret;
1179
1180         ret = rc80211_minstrel_ht_init();
1181         if (ret)
1182                 goto err_minstrel;
1183
1184         ret = rc80211_pid_init();
1185         if (ret)
1186                 goto err_pid;
1187
1188         ret = ieee80211_iface_init();
1189         if (ret)
1190                 goto err_netdev;
1191
1192         return 0;
1193  err_netdev:
1194         rc80211_pid_exit();
1195  err_pid:
1196         rc80211_minstrel_ht_exit();
1197  err_minstrel:
1198         rc80211_minstrel_exit();
1199
1200         return ret;
1201 }
1202
1203 static void __exit ieee80211_exit(void)
1204 {
1205         rc80211_pid_exit();
1206         rc80211_minstrel_ht_exit();
1207         rc80211_minstrel_exit();
1208
1209         ieee80211s_stop();
1210
1211         ieee80211_iface_exit();
1212
1213         rcu_barrier();
1214 }
1215
1216
1217 subsys_initcall(ieee80211_init);
1218 module_exit(ieee80211_exit);
1219
1220 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1221 MODULE_LICENSE("GPL");