net/mac80211/main.c

   1 /*
   2  * Copyright 2002-2005, Instant802 Networks, Inc.
   3  * Copyright 2005-2006, Devicescape Software, Inc.
   4  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   5  * Copyright 2013-2014  Intel Mobile Communications GmbH
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11
  12 #include <net/mac80211.h>
  13 #include <linux/module.h>
  14 #include <linux/init.h>
  15 #include <linux/netdevice.h>
  16 #include <linux/types.h>
  17 #include <linux/slab.h>
  18 #include <linux/skbuff.h>
  19 #include <linux/etherdevice.h>
  20 #include <linux/if_arp.h>
  21 #include <linux/rtnetlink.h>
  22 #include <linux/bitmap.h>
  23 #include <linux/inetdevice.h>
  24 #include <net/net_namespace.h>
  25 #include <net/cfg80211.h>
  26 #include <net/addrconf.h>
  27
  28 #include "ieee80211_i.h"
  29 #include "driver-ops.h"
  30 #include "rate.h"
  31 #include "mesh.h"
  32 #include "wep.h"
  33 #include "led.h"
  34 #include "debugfs.h"
  35
  36 void ieee80211_configure_filter(struct ieee80211_local *local)
  37 {
  38         u64 mc;
  39         unsigned int changed_flags;
  40         unsigned int new_flags = 0;
  41
  42         if (atomic_read(&local->iff_allmultis))
  43                 new_flags |= FIF_ALLMULTI;
  44
  45         if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) ||
  46             test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning))
  47                 new_flags |= FIF_BCN_PRBRESP_PROMISC;
  48
  49         if (local->fif_probe_req || local->probe_req_reg)
  50                 new_flags |= FIF_PROBE_REQ;
  51
  52         if (local->fif_fcsfail)
  53                 new_flags |= FIF_FCSFAIL;
  54
  55         if (local->fif_plcpfail)
  56                 new_flags |= FIF_PLCPFAIL;
  57
  58         if (local->fif_control)
  59                 new_flags |= FIF_CONTROL;
  60
  61         if (local->fif_other_bss)
  62                 new_flags |= FIF_OTHER_BSS;
  63
  64         if (local->fif_pspoll)
  65                 new_flags |= FIF_PSPOLL;
  66
  67         spin_lock_bh(&local->filter_lock);
  68         changed_flags = local->filter_flags ^ new_flags;
  69
  70         mc = drv_prepare_multicast(local, &local->mc_list);
  71         spin_unlock_bh(&local->filter_lock);
  72
  73         /* be a bit nasty */
  74         new_flags |= (1<<31);
  75
  76         drv_configure_filter(local, changed_flags, &new_flags, mc);
  77
  78         WARN_ON(new_flags & (1<<31));
  79
  80         local->filter_flags = new_flags & ~(1<<31);
  81 }
  82
  83 static void ieee80211_reconfig_filter(struct work_struct *work)
  84 {
  85         struct ieee80211_local *local =
  86                 container_of(work, struct ieee80211_local, reconfig_filter);
  87
  88         ieee80211_configure_filter(local);
  89 }
  90
  91 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
  92 {
  93         struct ieee80211_sub_if_data *sdata;
  94         struct cfg80211_chan_def chandef = {};
  95         u32 changed = 0;
  96         int power;
  97         u32 offchannel_flag;
  98
  99         offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
 100
 101         if (local->scan_chandef.chan) {
 102                 chandef = local->scan_chandef;
 103         } else if (local->tmp_channel) {
 104                 chandef.chan = local->tmp_channel;
 105                 chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
 106                 chandef.center_freq1 = chandef.chan->center_freq;
 107         } else
 108                 chandef = local->_oper_chandef;
 109
 110         WARN(!cfg80211_chandef_valid(&chandef),
 111              "control:%d MHz width:%d center: %d/%d MHz",
 112              chandef.chan->center_freq, chandef.width,
 113              chandef.center_freq1, chandef.center_freq2);
 114
 115         if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef))
 116                 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
 117         else
 118                 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
 119
 120         offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
 121
 122         if (offchannel_flag ||
 123             !cfg80211_chandef_identical(&local->hw.conf.chandef,
 124                                         &local->_oper_chandef)) {
 125                 local->hw.conf.chandef = chandef;
 126                 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
 127         }
 128
 129         if (!conf_is_ht(&local->hw.conf)) {
 130                 /*
 131                  * mac80211.h documents that this is only valid
 132                  * when the channel is set to an HT type, and
 133                  * that otherwise STATIC is used.
 134                  */
 135                 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
 136         } else if (local->hw.conf.smps_mode != local->smps_mode) {
 137                 local->hw.conf.smps_mode = local->smps_mode;
 138                 changed |= IEEE80211_CONF_CHANGE_SMPS;
 139         }
 140
 141         power = ieee80211_chandef_max_power(&chandef);
 142
 143         rcu_read_lock();
 144         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 145                 if (!rcu_access_pointer(sdata->vif.chanctx_conf))
 146                         continue;
 147                 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
 148                         continue;
 149                 power = min(power, sdata->vif.bss_conf.txpower);
 150         }
 151         rcu_read_unlock();
 152
 153         if (local->hw.conf.power_level != power) {
 154                 changed |= IEEE80211_CONF_CHANGE_POWER;
 155                 local->hw.conf.power_level = power;
 156         }
 157
 158         return changed;
 159 }
 160
 161 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
 162 {
 163         int ret = 0;
 164
 165         might_sleep();
 166
 167         if (!local->use_chanctx)
 168                 changed |= ieee80211_hw_conf_chan(local);
 169         else
 170                 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
 171                              IEEE80211_CONF_CHANGE_POWER);
 172
 173         if (changed && local->open_count) {
 174                 ret = drv_config(local, changed);
 175                 /*
 176                  * Goal:
 177                  * HW reconfiguration should never fail, the driver has told
 178                  * us what it can support so it should live up to that promise.
 179                  *
 180                  * Current status:
 181                  * rfkill is not integrated with mac80211 and a
 182                  * configuration command can thus fail if hardware rfkill
 183                  * is enabled
 184                  *
 185                  * FIXME: integrate rfkill with mac80211 and then add this
 186                  * WARN_ON() back
 187                  *
 188                  */
 189                 /* WARN_ON(ret); */
 190         }
 191
 192         return ret;
 193 }
 194
 195 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
 196                                       u32 changed)
 197 {
 198         struct ieee80211_local *local = sdata->local;
 199
 200         if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
 201                 return;
 202
 203         drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
 204 }
 205
 206 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
 207 {
 208         sdata->vif.bss_conf.use_cts_prot = false;
 209         sdata->vif.bss_conf.use_short_preamble = false;
 210         sdata->vif.bss_conf.use_short_slot = false;
 211         return BSS_CHANGED_ERP_CTS_PROT |
 212                BSS_CHANGED_ERP_PREAMBLE |
 213                BSS_CHANGED_ERP_SLOT;
 214 }
 215
 216 static void ieee80211_tasklet_handler(unsigned long data)
 217 {
 218         struct ieee80211_local *local = (struct ieee80211_local *) data;
 219         struct sk_buff *skb;
 220
 221         while ((skb = skb_dequeue(&local->skb_queue)) ||
 222                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
 223                 switch (skb->pkt_type) {
 224                 case IEEE80211_RX_MSG:
 225                         /* Clear skb->pkt_type in order to not confuse kernel
 226                          * netstack. */
 227                         skb->pkt_type = 0;
 228                         ieee80211_rx(&local->hw, skb);
 229                         break;
 230                 case IEEE80211_TX_STATUS_MSG:
 231                         skb->pkt_type = 0;
 232                         ieee80211_tx_status(&local->hw, skb);
 233                         break;
 234                 default:
 235                         WARN(1, "mac80211: Packet is of unknown type %d\n",
 236                              skb->pkt_type);
 237                         dev_kfree_skb(skb);
 238                         break;
 239                 }
 240         }
 241 }
 242
 243 static void ieee80211_restart_work(struct work_struct *work)
 244 {
 245         struct ieee80211_local *local =
 246                 container_of(work, struct ieee80211_local, restart_work);
 247         struct ieee80211_sub_if_data *sdata;
 248
 249         /* wait for scan work complete */
 250         flush_workqueue(local->workqueue);
 251
 252         WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
 253              "%s called with hardware scan in progress\n", __func__);
 254
 255         rtnl_lock();
 256         list_for_each_entry(sdata, &local->interfaces, list) {
 257                 /*
 258                  * XXX: there may be more work for other vif types and even
 259                  * for station mode: a good thing would be to run most of
 260                  * the iface type's dependent _stop (ieee80211_mg_stop,
 261                  * ieee80211_ibss_stop) etc...
 262                  * For now, fix only the specific bug that was seen: race
 263                  * between csa_connection_drop_work and us.
 264                  */
 265                 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
 266                         /*
 267                          * This worker is scheduled from the iface worker that
 268                          * runs on mac80211's workqueue, so we can't be
 269                          * scheduling this worker after the cancel right here.
 270                          * The exception is ieee80211_chswitch_done.
 271                          * Then we can have a race...
 272                          */
 273                         cancel_work_sync(&sdata->u.mgd.csa_connection_drop_work);
 274                 }
 275                 flush_delayed_work(&sdata->dec_tailroom_needed_wk);
 276         }
 277         ieee80211_scan_cancel(local);
 278         ieee80211_reconfig(local);
 279         rtnl_unlock();
 280 }
 281
 282 void ieee80211_restart_hw(struct ieee80211_hw *hw)
 283 {
 284         struct ieee80211_local *local = hw_to_local(hw);
 285
 286         trace_api_restart_hw(local);
 287
 288         wiphy_info(hw->wiphy,
 289                    "Hardware restart was requested\n");
 290
 291         /* use this reason, ieee80211_reconfig will unblock it */
 292         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 293                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
 294                                         false);
 295
 296         /*
 297          * Stop all Rx during the reconfig. We don't want state changes
 298          * or driver callbacks while this is in progress.
 299          */
 300         local->in_reconfig = true;
 301         barrier();
 302
 303         queue_work(system_freezable_wq, &local->restart_work);
 304 }
 305 EXPORT_SYMBOL(ieee80211_restart_hw);
 306
 307 #ifdef CONFIG_INET
 308 static int ieee80211_ifa_changed(struct notifier_block *nb,
 309                                  unsigned long data, void *arg)
 310 {
 311         struct in_ifaddr *ifa = arg;
 312         struct ieee80211_local *local =
 313                 container_of(nb, struct ieee80211_local,
 314                              ifa_notifier);
 315         struct net_device *ndev = ifa->ifa_dev->dev;
 316         struct wireless_dev *wdev = ndev->ieee80211_ptr;
 317         struct in_device *idev;
 318         struct ieee80211_sub_if_data *sdata;
 319         struct ieee80211_bss_conf *bss_conf;
 320         struct ieee80211_if_managed *ifmgd;
 321         int c = 0;
 322
 323         /* Make sure it's our interface that got changed */
 324         if (!wdev)
 325                 return NOTIFY_DONE;
 326
 327         if (wdev->wiphy != local->hw.wiphy)
 328                 return NOTIFY_DONE;
 329
 330         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
 331         bss_conf = &sdata->vif.bss_conf;
 332
 333         /* ARP filtering is only supported in managed mode */
 334         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 335                 return NOTIFY_DONE;
 336
 337         idev = __in_dev_get_rtnl(sdata->dev);
 338         if (!idev)
 339                 return NOTIFY_DONE;
 340
 341         ifmgd = &sdata->u.mgd;
 342         sdata_lock(sdata);
 343
 344         /* Copy the addresses to the bss_conf list */
 345         ifa = idev->ifa_list;
 346         while (ifa) {
 347                 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
 348                         bss_conf->arp_addr_list[c] = ifa->ifa_address;
 349                 ifa = ifa->ifa_next;
 350                 c++;
 351         }
 352
 353         bss_conf->arp_addr_cnt = c;
 354
 355         /* Configure driver only if associated (which also implies it is up) */
 356         if (ifmgd->associated)
 357                 ieee80211_bss_info_change_notify(sdata,
 358                                                  BSS_CHANGED_ARP_FILTER);
 359
 360         sdata_unlock(sdata);
 361
 362         return NOTIFY_OK;
 363 }
 364 #endif
 365
 366 #if IS_ENABLED(CONFIG_IPV6)
 367 static int ieee80211_ifa6_changed(struct notifier_block *nb,
 368                                   unsigned long data, void *arg)
 369 {
 370         struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
 371         struct inet6_dev *idev = ifa->idev;
 372         struct net_device *ndev = ifa->idev->dev;
 373         struct ieee80211_local *local =
 374                 container_of(nb, struct ieee80211_local, ifa6_notifier);
 375         struct wireless_dev *wdev = ndev->ieee80211_ptr;
 376         struct ieee80211_sub_if_data *sdata;
 377
 378         /* Make sure it's our interface that got changed */
 379         if (!wdev || wdev->wiphy != local->hw.wiphy)
 380                 return NOTIFY_DONE;
 381
 382         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
 383
 384         /*
 385          * For now only support station mode. This is mostly because
 386          * doing AP would have to handle AP_VLAN in some way ...
 387          */
 388         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 389                 return NOTIFY_DONE;
 390
 391         drv_ipv6_addr_change(local, sdata, idev);
 392
 393         return NOTIFY_OK;
 394 }
 395 #endif
 396
 397 /* There isn't a lot of sense in it, but you can transmit anything you like */
 398 static const struct ieee80211_txrx_stypes
 399 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
 400         [NL80211_IFTYPE_ADHOC] = {
 401                 .tx = 0xffff,
 402                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 403                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 404                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 405                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 406         },
 407         [NL80211_IFTYPE_STATION] = {
 408                 .tx = 0xffff,
 409                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 410                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 411         },
 412         [NL80211_IFTYPE_AP] = {
 413                 .tx = 0xffff,
 414                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 415                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 416                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 417                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 418                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 419                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 420                         BIT(IEEE80211_STYPE_ACTION >> 4),
 421         },
 422         [NL80211_IFTYPE_AP_VLAN] = {
 423                 /* copy AP */
 424                 .tx = 0xffff,
 425                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 426                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 427                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 428                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 429                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 430                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 431                         BIT(IEEE80211_STYPE_ACTION >> 4),
 432         },
 433         [NL80211_IFTYPE_P2P_CLIENT] = {
 434                 .tx = 0xffff,
 435                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 436                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 437         },
 438         [NL80211_IFTYPE_P2P_GO] = {
 439                 .tx = 0xffff,
 440                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 441                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 442                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 443                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 444                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 445                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 446                         BIT(IEEE80211_STYPE_ACTION >> 4),
 447         },
 448         [NL80211_IFTYPE_MESH_POINT] = {
 449                 .tx = 0xffff,
 450                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 451                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 452                         BIT(IEEE80211_STYPE_DEAUTH >> 4),
 453         },
 454         [NL80211_IFTYPE_P2P_DEVICE] = {
 455                 .tx = 0xffff,
 456                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 457                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 458         },
 459 };
 460
 461 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
 462         .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
 463                              IEEE80211_HT_AMPDU_PARM_DENSITY,
 464
 465         .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
 466                                 IEEE80211_HT_CAP_MAX_AMSDU |
 467                                 IEEE80211_HT_CAP_SGI_20 |
 468                                 IEEE80211_HT_CAP_SGI_40 |
 469                                 IEEE80211_HT_CAP_LDPC_CODING |
 470                                 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
 471         .mcs = {
 472                 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
 473                              0xff, 0xff, 0xff, 0xff, 0xff, },
 474         },
 475 };
 476
 477 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
 478         .vht_cap_info =
 479                 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
 480                             IEEE80211_VHT_CAP_SHORT_GI_80 |
 481                             IEEE80211_VHT_CAP_SHORT_GI_160 |
 482                             IEEE80211_VHT_CAP_RXSTBC_MASK |
 483                             IEEE80211_VHT_CAP_TXSTBC |
 484                             IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
 485                             IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
 486                             IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
 487                             IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
 488                             IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
 489         .supp_mcs = {
 490                 .rx_mcs_map = cpu_to_le16(~0),
 491                 .tx_mcs_map = cpu_to_le16(~0),
 492         },
 493 };
 494
 495 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
 496                                            const struct ieee80211_ops *ops,
 497                                            const char *requested_name)
 498 {
 499         struct ieee80211_local *local;
 500         int priv_size, i;
 501         struct wiphy *wiphy;
 502         bool use_chanctx;
 503
 504         if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
 505                     !ops->add_interface || !ops->remove_interface ||
 506                     !ops->configure_filter))
 507                 return NULL;
 508
 509         if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
 510                 return NULL;
 511
 512         /* check all or no channel context operations exist */
 513         i = !!ops->add_chanctx + !!ops->remove_chanctx +
 514             !!ops->change_chanctx + !!ops->assign_vif_chanctx +
 515             !!ops->unassign_vif_chanctx;
 516         if (WARN_ON(i != 0 && i != 5))
 517                 return NULL;
 518         use_chanctx = i == 5;
 519
 520         /* Ensure 32-byte alignment of our private data and hw private data.
 521          * We use the wiphy priv data for both our ieee80211_local and for
 522          * the driver's private data
 523          *
 524          * In memory it'll be like this:
 525          *
 526          * +-------------------------+
 527          * | struct wiphy           |
 528          * +-------------------------+
 529          * | struct ieee80211_local  |
 530          * +-------------------------+
 531          * | driver's private data   |
 532          * +-------------------------+
 533          *
 534          */
 535         priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
 536
 537         wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
 538
 539         if (!wiphy)
 540                 return NULL;
 541
 542         wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
 543
 544         wiphy->privid = mac80211_wiphy_privid;
 545
 546         wiphy->flags |= WIPHY_FLAG_NETNS_OK |
 547                         WIPHY_FLAG_4ADDR_AP |
 548                         WIPHY_FLAG_4ADDR_STATION |
 549                         WIPHY_FLAG_REPORTS_OBSS |
 550                         WIPHY_FLAG_OFFCHAN_TX;
 551
 552         if (ops->remain_on_channel)
 553                 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
 554
 555         wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
 556                            NL80211_FEATURE_SAE |
 557                            NL80211_FEATURE_HT_IBSS |
 558                            NL80211_FEATURE_VIF_TXPOWER |
 559                            NL80211_FEATURE_MAC_ON_CREATE |
 560                            NL80211_FEATURE_USERSPACE_MPM;
 561
 562         if (!ops->hw_scan)
 563                 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
 564                                    NL80211_FEATURE_AP_SCAN;
 565
 566
 567         if (!ops->set_key)
 568                 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 569
 570         wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
 571
 572         local = wiphy_priv(wiphy);
 573
 574         if (sta_info_init(local))
 575                 goto err_free;
 576
 577         local->hw.wiphy = wiphy;
 578
 579         local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
 580
 581         local->ops = ops;
 582         local->use_chanctx = use_chanctx;
 583
 584         /* set up some defaults */
 585         local->hw.queues = 1;
 586         local->hw.max_rates = 1;
 587         local->hw.max_report_rates = 0;
 588         local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
 589         local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
 590         local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
 591         local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
 592         local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
 593         local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
 594                                          IEEE80211_RADIOTAP_MCS_HAVE_GI |
 595                                          IEEE80211_RADIOTAP_MCS_HAVE_BW;
 596         local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
 597                                          IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
 598         local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
 599         local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
 600         local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
 601         wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
 602         wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
 603
 604         local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
 605
 606         wiphy->extended_capabilities = local->ext_capa;
 607         wiphy->extended_capabilities_mask = local->ext_capa;
 608         wiphy->extended_capabilities_len =
 609                 ARRAY_SIZE(local->ext_capa);
 610
 611         INIT_LIST_HEAD(&local->interfaces);
 612
 613         __hw_addr_init(&local->mc_list);
 614
 615         mutex_init(&local->iflist_mtx);
 616         mutex_init(&local->mtx);
 617
 618         mutex_init(&local->key_mtx);
 619         spin_lock_init(&local->filter_lock);
 620         spin_lock_init(&local->rx_path_lock);
 621         spin_lock_init(&local->queue_stop_reason_lock);
 622
 623         INIT_LIST_HEAD(&local->chanctx_list);
 624         mutex_init(&local->chanctx_mtx);
 625
 626         INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
 627
 628         INIT_WORK(&local->restart_work, ieee80211_restart_work);
 629
 630         INIT_WORK(&local->radar_detected_work,
 631                   ieee80211_dfs_radar_detected_work);
 632
 633         INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
 634         local->smps_mode = IEEE80211_SMPS_OFF;
 635
 636         INIT_WORK(&local->dynamic_ps_enable_work,
 637                   ieee80211_dynamic_ps_enable_work);
 638         INIT_WORK(&local->dynamic_ps_disable_work,
 639                   ieee80211_dynamic_ps_disable_work);
 640         setup_timer(&local->dynamic_ps_timer,
 641                     ieee80211_dynamic_ps_timer, (unsigned long) local);
 642
 643         INIT_WORK(&local->sched_scan_stopped_work,
 644                   ieee80211_sched_scan_stopped_work);
 645
 646         INIT_WORK(&local->tdls_chsw_work, ieee80211_tdls_chsw_work);
 647
 648         spin_lock_init(&local->ack_status_lock);
 649         idr_init(&local->ack_status_frames);
 650
 651         for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
 652                 skb_queue_head_init(&local->pending[i]);
 653                 atomic_set(&local->agg_queue_stop[i], 0);
 654         }
 655         tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
 656                      (unsigned long)local);
 657
 658         tasklet_init(&local->tasklet,
 659                      ieee80211_tasklet_handler,
 660                      (unsigned long) local);
 661
 662         skb_queue_head_init(&local->skb_queue);
 663         skb_queue_head_init(&local->skb_queue_unreliable);
 664         skb_queue_head_init(&local->skb_queue_tdls_chsw);
 665
 666         ieee80211_alloc_led_names(local);
 667
 668         ieee80211_roc_setup(local);
 669
 670         return &local->hw;
 671  err_free:
 672         wiphy_free(wiphy);
 673         return NULL;
 674 }
 675 EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
 676
 677 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
 678 {
 679         bool have_wep = !(IS_ERR(local->wep_tx_tfm) ||
 680                           IS_ERR(local->wep_rx_tfm));
 681         bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE);
 682         int n_suites = 0, r = 0, w = 0;
 683         u32 *suites;
 684         static const u32 cipher_suites[] = {
 685                 /* keep WEP first, it may be removed below */
 686                 WLAN_CIPHER_SUITE_WEP40,
 687                 WLAN_CIPHER_SUITE_WEP104,
 688                 WLAN_CIPHER_SUITE_TKIP,
 689                 WLAN_CIPHER_SUITE_CCMP,
 690                 WLAN_CIPHER_SUITE_CCMP_256,
 691                 WLAN_CIPHER_SUITE_GCMP,
 692                 WLAN_CIPHER_SUITE_GCMP_256,
 693
 694                 /* keep last -- depends on hw flags! */
 695                 WLAN_CIPHER_SUITE_AES_CMAC,
 696                 WLAN_CIPHER_SUITE_BIP_CMAC_256,
 697                 WLAN_CIPHER_SUITE_BIP_GMAC_128,
 698                 WLAN_CIPHER_SUITE_BIP_GMAC_256,
 699         };
 700
 701         if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) ||
 702             local->hw.wiphy->cipher_suites) {
 703                 /* If the driver advertises, or doesn't support SW crypto,
 704                  * we only need to remove WEP if necessary.
 705                  */
 706                 if (have_wep)
 707                         return 0;
 708
 709                 /* well if it has _no_ ciphers ... fine */
 710                 if (!local->hw.wiphy->n_cipher_suites)
 711                         return 0;
 712
 713                 /* Driver provides cipher suites, but we need to exclude WEP */
 714                 suites = kmemdup(local->hw.wiphy->cipher_suites,
 715                                  sizeof(u32) * local->hw.wiphy->n_cipher_suites,
 716                                  GFP_KERNEL);
 717                 if (!suites)
 718                         return -ENOMEM;
 719
 720                 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
 721                         u32 suite = local->hw.wiphy->cipher_suites[r];
 722
 723                         if (suite == WLAN_CIPHER_SUITE_WEP40 ||
 724                             suite == WLAN_CIPHER_SUITE_WEP104)
 725                                 continue;
 726                         suites[w++] = suite;
 727                 }
 728         } else if (!local->hw.cipher_schemes) {
 729                 /* If the driver doesn't have cipher schemes, there's nothing
 730                  * else to do other than assign the (software supported and
 731                  * perhaps offloaded) cipher suites.
 732                  */
 733                 local->hw.wiphy->cipher_suites = cipher_suites;
 734                 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
 735
 736                 if (!have_mfp)
 737                         local->hw.wiphy->n_cipher_suites -= 4;
 738
 739                 if (!have_wep) {
 740                         local->hw.wiphy->cipher_suites += 2;
 741                         local->hw.wiphy->n_cipher_suites -= 2;
 742                 }
 743
 744                 /* not dynamically allocated, so just return */
 745                 return 0;
 746         } else {
 747                 const struct ieee80211_cipher_scheme *cs;
 748
 749                 cs = local->hw.cipher_schemes;
 750
 751                 /* Driver specifies cipher schemes only (but not cipher suites
 752                  * including the schemes)
 753                  *
 754                  * We start counting ciphers defined by schemes, TKIP, CCMP,
 755                  * CCMP-256, GCMP, and GCMP-256
 756                  */
 757                 n_suites = local->hw.n_cipher_schemes + 5;
 758
 759                 /* check if we have WEP40 and WEP104 */
 760                 if (have_wep)
 761                         n_suites += 2;
 762
 763                 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128,
 764                  * BIP-GMAC-256
 765                  */
 766                 if (have_mfp)
 767                         n_suites += 4;
 768
 769                 suites = kmalloc(sizeof(u32) * n_suites, GFP_KERNEL);
 770                 if (!suites)
 771                         return -ENOMEM;
 772
 773                 suites[w++] = WLAN_CIPHER_SUITE_CCMP;
 774                 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256;
 775                 suites[w++] = WLAN_CIPHER_SUITE_TKIP;
 776                 suites[w++] = WLAN_CIPHER_SUITE_GCMP;
 777                 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256;
 778
 779                 if (have_wep) {
 780                         suites[w++] = WLAN_CIPHER_SUITE_WEP40;
 781                         suites[w++] = WLAN_CIPHER_SUITE_WEP104;
 782                 }
 783
 784                 if (have_mfp) {
 785                         suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC;
 786                         suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256;
 787                         suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128;
 788                         suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256;
 789                 }
 790
 791                 for (r = 0; r < local->hw.n_cipher_schemes; r++) {
 792                         suites[w++] = cs[r].cipher;
 793                         if (WARN_ON(cs[r].pn_len > IEEE80211_MAX_PN_LEN)) {
 794                                 kfree(suites);
 795                                 return -EINVAL;
 796                         }
 797                 }
 798         }
 799
 800         local->hw.wiphy->cipher_suites = suites;
 801         local->hw.wiphy->n_cipher_suites = w;
 802         local->wiphy_ciphers_allocated = true;
 803
 804         return 0;
 805 }
 806
 807 int ieee80211_register_hw(struct ieee80211_hw *hw)
 808 {
 809         struct ieee80211_local *local = hw_to_local(hw);
 810         int result, i;
 811         enum ieee80211_band band;
 812         int channels, max_bitrates;
 813         bool supp_ht, supp_vht;
 814         netdev_features_t feature_whitelist;
 815         struct cfg80211_chan_def dflt_chandef = {};
 816
 817         if (ieee80211_hw_check(hw, QUEUE_CONTROL) &&
 818             (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
 819              local->hw.offchannel_tx_hw_queue >= local->hw.queues))
 820                 return -EINVAL;
 821
 822         if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
 823             (!local->ops->tdls_channel_switch ||
 824              !local->ops->tdls_cancel_channel_switch ||
 825              !local->ops->tdls_recv_channel_switch))
 826                 return -EOPNOTSUPP;
 827
 828 #ifdef CONFIG_PM
 829         if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
 830                 return -EINVAL;
 831 #endif
 832
 833         if (!local->use_chanctx) {
 834                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
 835                         const struct ieee80211_iface_combination *comb;
 836
 837                         comb = &local->hw.wiphy->iface_combinations[i];
 838
 839                         if (comb->num_different_channels > 1)
 840                                 return -EINVAL;
 841                 }
 842         } else {
 843                 /*
 844                  * WDS is currently prohibited when channel contexts are used
 845                  * because there's no clear definition of which channel WDS
 846                  * type interfaces use
 847                  */
 848                 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
 849                         return -EINVAL;
 850
 851                 /* DFS is not supported with multi-channel combinations yet */
 852                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
 853                         const struct ieee80211_iface_combination *comb;
 854
 855                         comb = &local->hw.wiphy->iface_combinations[i];
 856
 857                         if (comb->radar_detect_widths &&
 858                             comb->num_different_channels > 1)
 859                                 return -EINVAL;
 860                 }
 861         }
 862
 863         /* Only HW csum features are currently compatible with mac80211 */
 864         feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
 865                             NETIF_F_HW_CSUM | NETIF_F_SG | NETIF_F_HIGHDMA |
 866                             NETIF_F_GSO_SOFTWARE;
 867         if (WARN_ON(hw->netdev_features & ~feature_whitelist))
 868                 return -EINVAL;
 869
 870         if (hw->max_report_rates == 0)
 871                 hw->max_report_rates = hw->max_rates;
 872
 873         local->rx_chains = 1;
 874
 875         /*
 876          * generic code guarantees at least one band,
 877          * set this very early because much code assumes
 878          * that hw.conf.channel is assigned
 879          */
 880         channels = 0;
 881         max_bitrates = 0;
 882         supp_ht = false;
 883         supp_vht = false;
 884         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 885                 struct ieee80211_supported_band *sband;
 886
 887                 sband = local->hw.wiphy->bands[band];
 888                 if (!sband)
 889                         continue;
 890
 891                 if (!dflt_chandef.chan) {
 892                         /*
 893                          * Assign the first enabled channel to dflt_chandef
 894                          * from the list of channels
 895                          */
 896                         for (i = 0; i < sband->n_channels; i++)
 897                                 if (!(sband->channels[i].flags &
 898                                                 IEEE80211_CHAN_DISABLED))
 899                                         break;
 900                         /* if none found then use the first anyway */
 901                         if (i == sband->n_channels)
 902                                 i = 0;
 903                         cfg80211_chandef_create(&dflt_chandef,
 904                                                 &sband->channels[i],
 905                                                 NL80211_CHAN_NO_HT);
 906                         /* init channel we're on */
 907                         if (!local->use_chanctx && !local->_oper_chandef.chan) {
 908                                 local->hw.conf.chandef = dflt_chandef;
 909                                 local->_oper_chandef = dflt_chandef;
 910                         }
 911                         local->monitor_chandef = dflt_chandef;
 912                 }
 913
 914                 channels += sband->n_channels;
 915
 916                 if (max_bitrates < sband->n_bitrates)
 917                         max_bitrates = sband->n_bitrates;
 918                 supp_ht = supp_ht || sband->ht_cap.ht_supported;
 919                 supp_vht = supp_vht || sband->vht_cap.vht_supported;
 920
 921                 if (!sband->ht_cap.ht_supported)
 922                         continue;
 923
 924                 /* TODO: consider VHT for RX chains, hopefully it's the same */
 925                 local->rx_chains =
 926                         max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
 927                             local->rx_chains);
 928
 929                 /* no need to mask, SM_PS_DISABLED has all bits set */
 930                 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
 931                                      IEEE80211_HT_CAP_SM_PS_SHIFT;
 932         }
 933
 934         /* if low-level driver supports AP, we also support VLAN */
 935         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
 936                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
 937                 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
 938         }
 939
 940         /* mac80211 always supports monitor */
 941         hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
 942         hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
 943
 944         /* mac80211 doesn't support more than one IBSS interface right now */
 945         for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
 946                 const struct ieee80211_iface_combination *c;
 947                 int j;
 948
 949                 c = &hw->wiphy->iface_combinations[i];
 950
 951                 for (j = 0; j < c->n_limits; j++)
 952                         if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
 953                             c->limits[j].max > 1)
 954                                 return -EINVAL;
 955         }
 956
 957         local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
 958                                       sizeof(void *) * channels, GFP_KERNEL);
 959         if (!local->int_scan_req)
 960                 return -ENOMEM;
 961
 962         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 963                 if (!local->hw.wiphy->bands[band])
 964                         continue;
 965                 local->int_scan_req->rates[band] = (u32) -1;
 966         }
 967
 968 #ifndef CONFIG_MAC80211_MESH
 969         /* mesh depends on Kconfig, but drivers should set it if they want */
 970         local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
 971 #endif
 972
 973         /* if the underlying driver supports mesh, mac80211 will (at least)
 974          * provide routing of mesh authentication frames to userspace */
 975         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
 976                 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
 977
 978         /* mac80211 supports control port protocol changing */
 979         local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
 980
 981         if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) {
 982                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
 983         } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) {
 984                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
 985                 if (hw->max_signal <= 0) {
 986                         result = -EINVAL;
 987                         goto fail_wiphy_register;
 988                 }
 989         }
 990
 991         /*
 992          * Calculate scan IE length -- we need this to alloc
 993          * memory and to subtract from the driver limit. It
 994          * includes the DS Params, (extended) supported rates, and HT
 995          * information -- SSID is the driver's responsibility.
 996          */
 997         local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
 998                 3 /* DS Params */;
 999         if (supp_ht)
1000                 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
1001
1002         if (supp_vht)
1003                 local->scan_ies_len +=
1004                         2 + sizeof(struct ieee80211_vht_cap);
1005
1006         if (!local->ops->hw_scan) {
1007                 /* For hw_scan, driver needs to set these up. */
1008                 local->hw.wiphy->max_scan_ssids = 4;
1009                 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
1010         }
1011
1012         /*
1013          * If the driver supports any scan IEs, then assume the
1014          * limit includes the IEs mac80211 will add, otherwise
1015          * leave it at zero and let the driver sort it out; we
1016          * still pass our IEs to the driver but userspace will
1017          * not be allowed to in that case.
1018          */
1019         if (local->hw.wiphy->max_scan_ie_len)
1020                 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
1021
1022         if (WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes,
1023                                              local->hw.n_cipher_schemes))) {
1024                 result = -EINVAL;
1025                 goto fail_workqueue;
1026         }
1027
1028         result = ieee80211_init_cipher_suites(local);
1029         if (result < 0)
1030                 goto fail_wiphy_register;
1031
1032         if (!local->ops->remain_on_channel)
1033                 local->hw.wiphy->max_remain_on_channel_duration = 5000;
1034
1035         /* mac80211 based drivers don't support internal TDLS setup */
1036         if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
1037                 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
1038
1039         /* mac80211 supports eCSA, if the driver supports STA CSA at all */
1040         if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA))
1041                 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
1042
1043         local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM;
1044
1045         result = wiphy_register(local->hw.wiphy);
1046         if (result < 0)
1047                 goto fail_wiphy_register;
1048
1049         /*
1050          * We use the number of queues for feature tests (QoS, HT) internally
1051          * so restrict them appropriately.
1052          */
1053         if (hw->queues > IEEE80211_MAX_QUEUES)
1054                 hw->queues = IEEE80211_MAX_QUEUES;
1055
1056         local->workqueue =
1057                 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1058         if (!local->workqueue) {
1059                 result = -ENOMEM;
1060                 goto fail_workqueue;
1061         }
1062
1063         /*
1064          * The hardware needs headroom for sending the frame,
1065          * and we need some headroom for passing the frame to monitor
1066          * interfaces, but never both at the same time.
1067          */
1068         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1069                                    IEEE80211_TX_STATUS_HEADROOM);
1070
1071         debugfs_hw_add(local);
1072
1073         /*
1074          * if the driver doesn't specify a max listen interval we
1075          * use 5 which should be a safe default
1076          */
1077         if (local->hw.max_listen_interval == 0)
1078                 local->hw.max_listen_interval = 5;
1079
1080         local->hw.conf.listen_interval = local->hw.max_listen_interval;
1081
1082         local->dynamic_ps_forced_timeout = -1;
1083
1084         if (!local->hw.txq_ac_max_pending)
1085                 local->hw.txq_ac_max_pending = 64;
1086
1087         result = ieee80211_wep_init(local);
1088         if (result < 0)
1089                 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
1090                             result);
1091
1092         local->hw.conf.flags = IEEE80211_CONF_IDLE;
1093
1094         ieee80211_led_init(local);
1095
1096         rtnl_lock();
1097
1098         result = ieee80211_init_rate_ctrl_alg(local,
1099                                               hw->rate_control_algorithm);
1100         if (result < 0) {
1101                 wiphy_debug(local->hw.wiphy,
1102                             "Failed to initialize rate control algorithm\n");
1103                 goto fail_rate;
1104         }
1105
1106         /* add one default STA interface if supported */
1107         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1108             !ieee80211_hw_check(hw, NO_AUTO_VIF)) {
1109                 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1110                                           NL80211_IFTYPE_STATION, NULL);
1111                 if (result)
1112                         wiphy_warn(local->hw.wiphy,
1113                                    "Failed to add default virtual iface\n");
1114         }
1115
1116         rtnl_unlock();
1117
1118 #ifdef CONFIG_INET
1119         local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1120         result = register_inetaddr_notifier(&local->ifa_notifier);
1121         if (result)
1122                 goto fail_ifa;
1123 #endif
1124
1125 #if IS_ENABLED(CONFIG_IPV6)
1126         local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1127         result = register_inet6addr_notifier(&local->ifa6_notifier);
1128         if (result)
1129                 goto fail_ifa6;
1130 #endif
1131
1132         return 0;
1133
1134 #if IS_ENABLED(CONFIG_IPV6)
1135  fail_ifa6:
1136 #ifdef CONFIG_INET
1137         unregister_inetaddr_notifier(&local->ifa_notifier);
1138 #endif
1139 #endif
1140 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1141  fail_ifa:
1142 #endif
1143         rtnl_lock();
1144         rate_control_deinitialize(local);
1145         ieee80211_remove_interfaces(local);
1146  fail_rate:
1147         rtnl_unlock();
1148         ieee80211_led_exit(local);
1149         ieee80211_wep_free(local);
1150         destroy_workqueue(local->workqueue);
1151  fail_workqueue:
1152         wiphy_unregister(local->hw.wiphy);
1153  fail_wiphy_register:
1154         if (local->wiphy_ciphers_allocated)
1155                 kfree(local->hw.wiphy->cipher_suites);
1156         kfree(local->int_scan_req);
1157         return result;
1158 }
1159 EXPORT_SYMBOL(ieee80211_register_hw);
1160
1161 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1162 {
1163         struct ieee80211_local *local = hw_to_local(hw);
1164
1165         tasklet_kill(&local->tx_pending_tasklet);
1166         tasklet_kill(&local->tasklet);
1167
1168 #ifdef CONFIG_INET
1169         unregister_inetaddr_notifier(&local->ifa_notifier);
1170 #endif
1171 #if IS_ENABLED(CONFIG_IPV6)
1172         unregister_inet6addr_notifier(&local->ifa6_notifier);
1173 #endif
1174
1175         rtnl_lock();
1176
1177         /*
1178          * At this point, interface list manipulations are fine
1179          * because the driver cannot be handing us frames any
1180          * more and the tasklet is killed.
1181          */
1182         ieee80211_remove_interfaces(local);
1183
1184         rtnl_unlock();
1185
1186         cancel_work_sync(&local->restart_work);
1187         cancel_work_sync(&local->reconfig_filter);
1188         cancel_work_sync(&local->tdls_chsw_work);
1189         flush_work(&local->sched_scan_stopped_work);
1190
1191         ieee80211_clear_tx_pending(local);
1192         rate_control_deinitialize(local);
1193
1194         if (skb_queue_len(&local->skb_queue) ||
1195             skb_queue_len(&local->skb_queue_unreliable))
1196                 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1197         skb_queue_purge(&local->skb_queue);
1198         skb_queue_purge(&local->skb_queue_unreliable);
1199         skb_queue_purge(&local->skb_queue_tdls_chsw);
1200
1201         destroy_workqueue(local->workqueue);
1202         wiphy_unregister(local->hw.wiphy);
1203         ieee80211_wep_free(local);
1204         ieee80211_led_exit(local);
1205         kfree(local->int_scan_req);
1206 }
1207 EXPORT_SYMBOL(ieee80211_unregister_hw);
1208
1209 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1210 {
1211         WARN_ONCE(1, "Have pending ack frames!\n");
1212         kfree_skb(p);
1213         return 0;
1214 }
1215
1216 void ieee80211_free_hw(struct ieee80211_hw *hw)
1217 {
1218         struct ieee80211_local *local = hw_to_local(hw);
1219
1220         mutex_destroy(&local->iflist_mtx);
1221         mutex_destroy(&local->mtx);
1222
1223         if (local->wiphy_ciphers_allocated)
1224                 kfree(local->hw.wiphy->cipher_suites);
1225
1226         idr_for_each(&local->ack_status_frames,
1227                      ieee80211_free_ack_frame, NULL);
1228         idr_destroy(&local->ack_status_frames);
1229
1230         sta_info_stop(local);
1231
1232         ieee80211_free_led_names(local);
1233
1234         wiphy_free(local->hw.wiphy);
1235 }
1236 EXPORT_SYMBOL(ieee80211_free_hw);
1237
1238 static int __init ieee80211_init(void)
1239 {
1240         struct sk_buff *skb;
1241         int ret;
1242
1243         BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1244         BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1245                      IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1246
1247         ret = rc80211_minstrel_init();
1248         if (ret)
1249                 return ret;
1250
1251         ret = rc80211_minstrel_ht_init();
1252         if (ret)
1253                 goto err_minstrel;
1254
1255         ret = ieee80211_iface_init();
1256         if (ret)
1257                 goto err_netdev;
1258
1259         return 0;
1260  err_netdev:
1261         rc80211_minstrel_ht_exit();
1262  err_minstrel:
1263         rc80211_minstrel_exit();
1264
1265         return ret;
1266 }
1267
1268 static void __exit ieee80211_exit(void)
1269 {
1270         rc80211_minstrel_ht_exit();
1271         rc80211_minstrel_exit();
1272
1273         ieee80211s_stop();
1274
1275         ieee80211_iface_exit();
1276
1277         rcu_barrier();
1278 }
1279
1280
1281 subsys_initcall(ieee80211_init);
1282 module_exit(ieee80211_exit);
1283
1284 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1285 MODULE_LICENSE("GPL");