net/mac80211/main.c

   1 /*
   2  * Copyright 2002-2005, Instant802 Networks, Inc.
   3  * Copyright 2005-2006, Devicescape Software, Inc.
   4  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   5  * Copyright 2013-2014  Intel Mobile Communications GmbH
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11
  12 #include <net/mac80211.h>
  13 #include <linux/module.h>
  14 #include <linux/init.h>
  15 #include <linux/netdevice.h>
  16 #include <linux/types.h>
  17 #include <linux/slab.h>
  18 #include <linux/skbuff.h>
  19 #include <linux/etherdevice.h>
  20 #include <linux/if_arp.h>
  21 #include <linux/rtnetlink.h>
  22 #include <linux/bitmap.h>
  23 #include <linux/inetdevice.h>
  24 #include <net/net_namespace.h>
  25 #include <net/cfg80211.h>
  26 #include <net/addrconf.h>
  27
  28 #include "ieee80211_i.h"
  29 #include "driver-ops.h"
  30 #include "rate.h"
  31 #include "mesh.h"
  32 #include "wep.h"
  33 #include "led.h"
  34 #include "debugfs.h"
  35
  36 void ieee80211_configure_filter(struct ieee80211_local *local)
  37 {
  38         u64 mc;
  39         unsigned int changed_flags;
  40         unsigned int new_flags = 0;
  41
  42         if (atomic_read(&local->iff_allmultis))
  43                 new_flags |= FIF_ALLMULTI;
  44
  45         if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) ||
  46             test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning))
  47                 new_flags |= FIF_BCN_PRBRESP_PROMISC;
  48
  49         if (local->fif_probe_req || local->probe_req_reg)
  50                 new_flags |= FIF_PROBE_REQ;
  51
  52         if (local->fif_fcsfail)
  53                 new_flags |= FIF_FCSFAIL;
  54
  55         if (local->fif_plcpfail)
  56                 new_flags |= FIF_PLCPFAIL;
  57
  58         if (local->fif_control)
  59                 new_flags |= FIF_CONTROL;
  60
  61         if (local->fif_other_bss)
  62                 new_flags |= FIF_OTHER_BSS;
  63
  64         if (local->fif_pspoll)
  65                 new_flags |= FIF_PSPOLL;
  66
  67         spin_lock_bh(&local->filter_lock);
  68         changed_flags = local->filter_flags ^ new_flags;
  69
  70         mc = drv_prepare_multicast(local, &local->mc_list);
  71         spin_unlock_bh(&local->filter_lock);
  72
  73         /* be a bit nasty */
  74         new_flags |= (1<<31);
  75
  76         drv_configure_filter(local, changed_flags, &new_flags, mc);
  77
  78         WARN_ON(new_flags & (1<<31));
  79
  80         local->filter_flags = new_flags & ~(1<<31);
  81 }
  82
  83 static void ieee80211_reconfig_filter(struct work_struct *work)
  84 {
  85         struct ieee80211_local *local =
  86                 container_of(work, struct ieee80211_local, reconfig_filter);
  87
  88         ieee80211_configure_filter(local);
  89 }
  90
  91 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
  92 {
  93         struct ieee80211_sub_if_data *sdata;
  94         struct cfg80211_chan_def chandef = {};
  95         u32 changed = 0;
  96         int power;
  97         u32 offchannel_flag;
  98
  99         offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
 100
 101         if (local->scan_chandef.chan) {
 102                 chandef = local->scan_chandef;
 103         } else if (local->tmp_channel) {
 104                 chandef.chan = local->tmp_channel;
 105                 chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
 106                 chandef.center_freq1 = chandef.chan->center_freq;
 107         } else
 108                 chandef = local->_oper_chandef;
 109
 110         WARN(!cfg80211_chandef_valid(&chandef),
 111              "control:%d MHz width:%d center: %d/%d MHz",
 112              chandef.chan->center_freq, chandef.width,
 113              chandef.center_freq1, chandef.center_freq2);
 114
 115         if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef))
 116                 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
 117         else
 118                 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
 119
 120         offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
 121
 122         if (offchannel_flag ||
 123             !cfg80211_chandef_identical(&local->hw.conf.chandef,
 124                                         &local->_oper_chandef)) {
 125                 local->hw.conf.chandef = chandef;
 126                 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
 127         }
 128
 129         if (!conf_is_ht(&local->hw.conf)) {
 130                 /*
 131                  * mac80211.h documents that this is only valid
 132                  * when the channel is set to an HT type, and
 133                  * that otherwise STATIC is used.
 134                  */
 135                 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
 136         } else if (local->hw.conf.smps_mode != local->smps_mode) {
 137                 local->hw.conf.smps_mode = local->smps_mode;
 138                 changed |= IEEE80211_CONF_CHANGE_SMPS;
 139         }
 140
 141         power = ieee80211_chandef_max_power(&chandef);
 142
 143         rcu_read_lock();
 144         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 145                 if (!rcu_access_pointer(sdata->vif.chanctx_conf))
 146                         continue;
 147                 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
 148                         continue;
 149                 power = min(power, sdata->vif.bss_conf.txpower);
 150         }
 151         rcu_read_unlock();
 152
 153         if (local->hw.conf.power_level != power) {
 154                 changed |= IEEE80211_CONF_CHANGE_POWER;
 155                 local->hw.conf.power_level = power;
 156         }
 157
 158         return changed;
 159 }
 160
 161 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
 162 {
 163         int ret = 0;
 164
 165         might_sleep();
 166
 167         if (!local->use_chanctx)
 168                 changed |= ieee80211_hw_conf_chan(local);
 169         else
 170                 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
 171                              IEEE80211_CONF_CHANGE_POWER);
 172
 173         if (changed && local->open_count) {
 174                 ret = drv_config(local, changed);
 175                 /*
 176                  * Goal:
 177                  * HW reconfiguration should never fail, the driver has told
 178                  * us what it can support so it should live up to that promise.
 179                  *
 180                  * Current status:
 181                  * rfkill is not integrated with mac80211 and a
 182                  * configuration command can thus fail if hardware rfkill
 183                  * is enabled
 184                  *
 185                  * FIXME: integrate rfkill with mac80211 and then add this
 186                  * WARN_ON() back
 187                  *
 188                  */
 189                 /* WARN_ON(ret); */
 190         }
 191
 192         return ret;
 193 }
 194
 195 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
 196                                       u32 changed)
 197 {
 198         struct ieee80211_local *local = sdata->local;
 199
 200         if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
 201                 return;
 202
 203         drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
 204 }
 205
 206 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
 207 {
 208         sdata->vif.bss_conf.use_cts_prot = false;
 209         sdata->vif.bss_conf.use_short_preamble = false;
 210         sdata->vif.bss_conf.use_short_slot = false;
 211         return BSS_CHANGED_ERP_CTS_PROT |
 212                BSS_CHANGED_ERP_PREAMBLE |
 213                BSS_CHANGED_ERP_SLOT;
 214 }
 215
 216 static void ieee80211_tasklet_handler(unsigned long data)
 217 {
 218         struct ieee80211_local *local = (struct ieee80211_local *) data;
 219         struct sk_buff *skb;
 220
 221         while ((skb = skb_dequeue(&local->skb_queue)) ||
 222                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
 223                 switch (skb->pkt_type) {
 224                 case IEEE80211_RX_MSG:
 225                         /* Clear skb->pkt_type in order to not confuse kernel
 226                          * netstack. */
 227                         skb->pkt_type = 0;
 228                         ieee80211_rx(&local->hw, skb);
 229                         break;
 230                 case IEEE80211_TX_STATUS_MSG:
 231                         skb->pkt_type = 0;
 232                         ieee80211_tx_status(&local->hw, skb);
 233                         break;
 234                 default:
 235                         WARN(1, "mac80211: Packet is of unknown type %d\n",
 236                              skb->pkt_type);
 237                         dev_kfree_skb(skb);
 238                         break;
 239                 }
 240         }
 241 }
 242
 243 static void ieee80211_restart_work(struct work_struct *work)
 244 {
 245         struct ieee80211_local *local =
 246                 container_of(work, struct ieee80211_local, restart_work);
 247         struct ieee80211_sub_if_data *sdata;
 248
 249         /* wait for scan work complete */
 250         flush_workqueue(local->workqueue);
 251         flush_work(&local->sched_scan_stopped_work);
 252
 253         WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
 254              "%s called with hardware scan in progress\n", __func__);
 255
 256         rtnl_lock();
 257         list_for_each_entry(sdata, &local->interfaces, list) {
 258                 /*
 259                  * XXX: there may be more work for other vif types and even
 260                  * for station mode: a good thing would be to run most of
 261                  * the iface type's dependent _stop (ieee80211_mg_stop,
 262                  * ieee80211_ibss_stop) etc...
 263                  * For now, fix only the specific bug that was seen: race
 264                  * between csa_connection_drop_work and us.
 265                  */
 266                 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
 267                         /*
 268                          * This worker is scheduled from the iface worker that
 269                          * runs on mac80211's workqueue, so we can't be
 270                          * scheduling this worker after the cancel right here.
 271                          * The exception is ieee80211_chswitch_done.
 272                          * Then we can have a race...
 273                          */
 274                         cancel_work_sync(&sdata->u.mgd.csa_connection_drop_work);
 275                 }
 276                 flush_delayed_work(&sdata->dec_tailroom_needed_wk);
 277         }
 278         ieee80211_scan_cancel(local);
 279
 280         /* make sure any new ROC will consider local->in_reconfig */
 281         flush_delayed_work(&local->roc_work);
 282         flush_work(&local->hw_roc_done);
 283
 284         ieee80211_reconfig(local);
 285         rtnl_unlock();
 286 }
 287
 288 void ieee80211_restart_hw(struct ieee80211_hw *hw)
 289 {
 290         struct ieee80211_local *local = hw_to_local(hw);
 291
 292         trace_api_restart_hw(local);
 293
 294         wiphy_info(hw->wiphy,
 295                    "Hardware restart was requested\n");
 296
 297         /* use this reason, ieee80211_reconfig will unblock it */
 298         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 299                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
 300                                         false);
 301
 302         /*
 303          * Stop all Rx during the reconfig. We don't want state changes
 304          * or driver callbacks while this is in progress.
 305          */
 306         local->in_reconfig = true;
 307         barrier();
 308
 309         queue_work(system_freezable_wq, &local->restart_work);
 310 }
 311 EXPORT_SYMBOL(ieee80211_restart_hw);
 312
 313 #ifdef CONFIG_INET
 314 static int ieee80211_ifa_changed(struct notifier_block *nb,
 315                                  unsigned long data, void *arg)
 316 {
 317         struct in_ifaddr *ifa = arg;
 318         struct ieee80211_local *local =
 319                 container_of(nb, struct ieee80211_local,
 320                              ifa_notifier);
 321         struct net_device *ndev = ifa->ifa_dev->dev;
 322         struct wireless_dev *wdev = ndev->ieee80211_ptr;
 323         struct in_device *idev;
 324         struct ieee80211_sub_if_data *sdata;
 325         struct ieee80211_bss_conf *bss_conf;
 326         struct ieee80211_if_managed *ifmgd;
 327         int c = 0;
 328
 329         /* Make sure it's our interface that got changed */
 330         if (!wdev)
 331                 return NOTIFY_DONE;
 332
 333         if (wdev->wiphy != local->hw.wiphy)
 334                 return NOTIFY_DONE;
 335
 336         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
 337         bss_conf = &sdata->vif.bss_conf;
 338
 339         /* ARP filtering is only supported in managed mode */
 340         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 341                 return NOTIFY_DONE;
 342
 343         idev = __in_dev_get_rtnl(sdata->dev);
 344         if (!idev)
 345                 return NOTIFY_DONE;
 346
 347         ifmgd = &sdata->u.mgd;
 348         sdata_lock(sdata);
 349
 350         /* Copy the addresses to the bss_conf list */
 351         ifa = idev->ifa_list;
 352         while (ifa) {
 353                 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
 354                         bss_conf->arp_addr_list[c] = ifa->ifa_address;
 355                 ifa = ifa->ifa_next;
 356                 c++;
 357         }
 358
 359         bss_conf->arp_addr_cnt = c;
 360
 361         /* Configure driver only if associated (which also implies it is up) */
 362         if (ifmgd->associated)
 363                 ieee80211_bss_info_change_notify(sdata,
 364                                                  BSS_CHANGED_ARP_FILTER);
 365
 366         sdata_unlock(sdata);
 367
 368         return NOTIFY_OK;
 369 }
 370 #endif
 371
 372 #if IS_ENABLED(CONFIG_IPV6)
 373 static int ieee80211_ifa6_changed(struct notifier_block *nb,
 374                                   unsigned long data, void *arg)
 375 {
 376         struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
 377         struct inet6_dev *idev = ifa->idev;
 378         struct net_device *ndev = ifa->idev->dev;
 379         struct ieee80211_local *local =
 380                 container_of(nb, struct ieee80211_local, ifa6_notifier);
 381         struct wireless_dev *wdev = ndev->ieee80211_ptr;
 382         struct ieee80211_sub_if_data *sdata;
 383
 384         /* Make sure it's our interface that got changed */
 385         if (!wdev || wdev->wiphy != local->hw.wiphy)
 386                 return NOTIFY_DONE;
 387
 388         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
 389
 390         /*
 391          * For now only support station mode. This is mostly because
 392          * doing AP would have to handle AP_VLAN in some way ...
 393          */
 394         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 395                 return NOTIFY_DONE;
 396
 397         drv_ipv6_addr_change(local, sdata, idev);
 398
 399         return NOTIFY_OK;
 400 }
 401 #endif
 402
 403 /* There isn't a lot of sense in it, but you can transmit anything you like */
 404 static const struct ieee80211_txrx_stypes
 405 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
 406         [NL80211_IFTYPE_ADHOC] = {
 407                 .tx = 0xffff,
 408                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 409                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 410                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 411                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 412         },
 413         [NL80211_IFTYPE_STATION] = {
 414                 .tx = 0xffff,
 415                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 416                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 417         },
 418         [NL80211_IFTYPE_AP] = {
 419                 .tx = 0xffff,
 420                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 421                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 422                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 423                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 424                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 425                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 426                         BIT(IEEE80211_STYPE_ACTION >> 4),
 427         },
 428         [NL80211_IFTYPE_AP_VLAN] = {
 429                 /* copy AP */
 430                 .tx = 0xffff,
 431                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 432                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 433                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 434                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 435                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 436                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 437                         BIT(IEEE80211_STYPE_ACTION >> 4),
 438         },
 439         [NL80211_IFTYPE_P2P_CLIENT] = {
 440                 .tx = 0xffff,
 441                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 442                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 443         },
 444         [NL80211_IFTYPE_P2P_GO] = {
 445                 .tx = 0xffff,
 446                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 447                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 448                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 449                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 450                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 451                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 452                         BIT(IEEE80211_STYPE_ACTION >> 4),
 453         },
 454         [NL80211_IFTYPE_MESH_POINT] = {
 455                 .tx = 0xffff,
 456                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 457                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 458                         BIT(IEEE80211_STYPE_DEAUTH >> 4),
 459         },
 460         [NL80211_IFTYPE_P2P_DEVICE] = {
 461                 .tx = 0xffff,
 462                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 463                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 464         },
 465 };
 466
 467 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
 468         .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
 469                              IEEE80211_HT_AMPDU_PARM_DENSITY,
 470
 471         .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
 472                                 IEEE80211_HT_CAP_MAX_AMSDU |
 473                                 IEEE80211_HT_CAP_SGI_20 |
 474                                 IEEE80211_HT_CAP_SGI_40 |
 475                                 IEEE80211_HT_CAP_LDPC_CODING |
 476                                 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
 477         .mcs = {
 478                 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
 479                              0xff, 0xff, 0xff, 0xff, 0xff, },
 480         },
 481 };
 482
 483 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
 484         .vht_cap_info =
 485                 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
 486                             IEEE80211_VHT_CAP_SHORT_GI_80 |
 487                             IEEE80211_VHT_CAP_SHORT_GI_160 |
 488                             IEEE80211_VHT_CAP_RXSTBC_MASK |
 489                             IEEE80211_VHT_CAP_TXSTBC |
 490                             IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
 491                             IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
 492                             IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
 493                             IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
 494                             IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
 495         .supp_mcs = {
 496                 .rx_mcs_map = cpu_to_le16(~0),
 497                 .tx_mcs_map = cpu_to_le16(~0),
 498         },
 499 };
 500
 501 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
 502                                            const struct ieee80211_ops *ops,
 503                                            const char *requested_name)
 504 {
 505         struct ieee80211_local *local;
 506         int priv_size, i;
 507         struct wiphy *wiphy;
 508         bool use_chanctx;
 509
 510         if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
 511                     !ops->add_interface || !ops->remove_interface ||
 512                     !ops->configure_filter))
 513                 return NULL;
 514
 515         if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
 516                 return NULL;
 517
 518         /* check all or no channel context operations exist */
 519         i = !!ops->add_chanctx + !!ops->remove_chanctx +
 520             !!ops->change_chanctx + !!ops->assign_vif_chanctx +
 521             !!ops->unassign_vif_chanctx;
 522         if (WARN_ON(i != 0 && i != 5))
 523                 return NULL;
 524         use_chanctx = i == 5;
 525
 526         /* Ensure 32-byte alignment of our private data and hw private data.
 527          * We use the wiphy priv data for both our ieee80211_local and for
 528          * the driver's private data
 529          *
 530          * In memory it'll be like this:
 531          *
 532          * +-------------------------+
 533          * | struct wiphy           |
 534          * +-------------------------+
 535          * | struct ieee80211_local  |
 536          * +-------------------------+
 537          * | driver's private data   |
 538          * +-------------------------+
 539          *
 540          */
 541         priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
 542
 543         wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
 544
 545         if (!wiphy)
 546                 return NULL;
 547
 548         wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
 549
 550         wiphy->privid = mac80211_wiphy_privid;
 551
 552         wiphy->flags |= WIPHY_FLAG_NETNS_OK |
 553                         WIPHY_FLAG_4ADDR_AP |
 554                         WIPHY_FLAG_4ADDR_STATION |
 555                         WIPHY_FLAG_REPORTS_OBSS |
 556                         WIPHY_FLAG_OFFCHAN_TX;
 557
 558         if (ops->remain_on_channel)
 559                 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
 560
 561         wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
 562                            NL80211_FEATURE_SAE |
 563                            NL80211_FEATURE_HT_IBSS |
 564                            NL80211_FEATURE_VIF_TXPOWER |
 565                            NL80211_FEATURE_MAC_ON_CREATE |
 566                            NL80211_FEATURE_USERSPACE_MPM |
 567                            NL80211_FEATURE_FULL_AP_CLIENT_STATE;
 568
 569         if (!ops->hw_scan)
 570                 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
 571                                    NL80211_FEATURE_AP_SCAN;
 572
 573
 574         if (!ops->set_key)
 575                 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 576
 577         wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM);
 578
 579         wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
 580
 581         local = wiphy_priv(wiphy);
 582
 583         if (sta_info_init(local))
 584                 goto err_free;
 585
 586         local->hw.wiphy = wiphy;
 587
 588         local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
 589
 590         local->ops = ops;
 591         local->use_chanctx = use_chanctx;
 592
 593         /* set up some defaults */
 594         local->hw.queues = 1;
 595         local->hw.max_rates = 1;
 596         local->hw.max_report_rates = 0;
 597         local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
 598         local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
 599         local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
 600         local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
 601         local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
 602         local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
 603                                          IEEE80211_RADIOTAP_MCS_HAVE_GI |
 604                                          IEEE80211_RADIOTAP_MCS_HAVE_BW;
 605         local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
 606                                          IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
 607         local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
 608         local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
 609         local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
 610         wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
 611         wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
 612
 613         local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
 614
 615         wiphy->extended_capabilities = local->ext_capa;
 616         wiphy->extended_capabilities_mask = local->ext_capa;
 617         wiphy->extended_capabilities_len =
 618                 ARRAY_SIZE(local->ext_capa);
 619
 620         INIT_LIST_HEAD(&local->interfaces);
 621
 622         __hw_addr_init(&local->mc_list);
 623
 624         mutex_init(&local->iflist_mtx);
 625         mutex_init(&local->mtx);
 626
 627         mutex_init(&local->key_mtx);
 628         spin_lock_init(&local->filter_lock);
 629         spin_lock_init(&local->rx_path_lock);
 630         spin_lock_init(&local->queue_stop_reason_lock);
 631
 632         INIT_LIST_HEAD(&local->chanctx_list);
 633         mutex_init(&local->chanctx_mtx);
 634
 635         INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
 636
 637         INIT_WORK(&local->restart_work, ieee80211_restart_work);
 638
 639         INIT_WORK(&local->radar_detected_work,
 640                   ieee80211_dfs_radar_detected_work);
 641
 642         INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
 643         local->smps_mode = IEEE80211_SMPS_OFF;
 644
 645         INIT_WORK(&local->dynamic_ps_enable_work,
 646                   ieee80211_dynamic_ps_enable_work);
 647         INIT_WORK(&local->dynamic_ps_disable_work,
 648                   ieee80211_dynamic_ps_disable_work);
 649         setup_timer(&local->dynamic_ps_timer,
 650                     ieee80211_dynamic_ps_timer, (unsigned long) local);
 651
 652         INIT_WORK(&local->sched_scan_stopped_work,
 653                   ieee80211_sched_scan_stopped_work);
 654
 655         INIT_WORK(&local->tdls_chsw_work, ieee80211_tdls_chsw_work);
 656
 657         spin_lock_init(&local->ack_status_lock);
 658         idr_init(&local->ack_status_frames);
 659
 660         for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
 661                 skb_queue_head_init(&local->pending[i]);
 662                 atomic_set(&local->agg_queue_stop[i], 0);
 663         }
 664         tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
 665                      (unsigned long)local);
 666
 667         tasklet_init(&local->tasklet,
 668                      ieee80211_tasklet_handler,
 669                      (unsigned long) local);
 670
 671         skb_queue_head_init(&local->skb_queue);
 672         skb_queue_head_init(&local->skb_queue_unreliable);
 673         skb_queue_head_init(&local->skb_queue_tdls_chsw);
 674
 675         ieee80211_alloc_led_names(local);
 676
 677         ieee80211_roc_setup(local);
 678
 679         local->hw.radiotap_timestamp.units_pos = -1;
 680         local->hw.radiotap_timestamp.accuracy = -1;
 681
 682         return &local->hw;
 683  err_free:
 684         wiphy_free(wiphy);
 685         return NULL;
 686 }
 687 EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
 688
 689 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
 690 {
 691         bool have_wep = !(IS_ERR(local->wep_tx_tfm) ||
 692                           IS_ERR(local->wep_rx_tfm));
 693         bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE);
 694         int n_suites = 0, r = 0, w = 0;
 695         u32 *suites;
 696         static const u32 cipher_suites[] = {
 697                 /* keep WEP first, it may be removed below */
 698                 WLAN_CIPHER_SUITE_WEP40,
 699                 WLAN_CIPHER_SUITE_WEP104,
 700                 WLAN_CIPHER_SUITE_TKIP,
 701                 WLAN_CIPHER_SUITE_CCMP,
 702                 WLAN_CIPHER_SUITE_CCMP_256,
 703                 WLAN_CIPHER_SUITE_GCMP,
 704                 WLAN_CIPHER_SUITE_GCMP_256,
 705
 706                 /* keep last -- depends on hw flags! */
 707                 WLAN_CIPHER_SUITE_AES_CMAC,
 708                 WLAN_CIPHER_SUITE_BIP_CMAC_256,
 709                 WLAN_CIPHER_SUITE_BIP_GMAC_128,
 710                 WLAN_CIPHER_SUITE_BIP_GMAC_256,
 711         };
 712
 713         if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) ||
 714             local->hw.wiphy->cipher_suites) {
 715                 /* If the driver advertises, or doesn't support SW crypto,
 716                  * we only need to remove WEP if necessary.
 717                  */
 718                 if (have_wep)
 719                         return 0;
 720
 721                 /* well if it has _no_ ciphers ... fine */
 722                 if (!local->hw.wiphy->n_cipher_suites)
 723                         return 0;
 724
 725                 /* Driver provides cipher suites, but we need to exclude WEP */
 726                 suites = kmemdup(local->hw.wiphy->cipher_suites,
 727                                  sizeof(u32) * local->hw.wiphy->n_cipher_suites,
 728                                  GFP_KERNEL);
 729                 if (!suites)
 730                         return -ENOMEM;
 731
 732                 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
 733                         u32 suite = local->hw.wiphy->cipher_suites[r];
 734
 735                         if (suite == WLAN_CIPHER_SUITE_WEP40 ||
 736                             suite == WLAN_CIPHER_SUITE_WEP104)
 737                                 continue;
 738                         suites[w++] = suite;
 739                 }
 740         } else if (!local->hw.cipher_schemes) {
 741                 /* If the driver doesn't have cipher schemes, there's nothing
 742                  * else to do other than assign the (software supported and
 743                  * perhaps offloaded) cipher suites.
 744                  */
 745                 local->hw.wiphy->cipher_suites = cipher_suites;
 746                 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
 747
 748                 if (!have_mfp)
 749                         local->hw.wiphy->n_cipher_suites -= 4;
 750
 751                 if (!have_wep) {
 752                         local->hw.wiphy->cipher_suites += 2;
 753                         local->hw.wiphy->n_cipher_suites -= 2;
 754                 }
 755
 756                 /* not dynamically allocated, so just return */
 757                 return 0;
 758         } else {
 759                 const struct ieee80211_cipher_scheme *cs;
 760
 761                 cs = local->hw.cipher_schemes;
 762
 763                 /* Driver specifies cipher schemes only (but not cipher suites
 764                  * including the schemes)
 765                  *
 766                  * We start counting ciphers defined by schemes, TKIP, CCMP,
 767                  * CCMP-256, GCMP, and GCMP-256
 768                  */
 769                 n_suites = local->hw.n_cipher_schemes + 5;
 770
 771                 /* check if we have WEP40 and WEP104 */
 772                 if (have_wep)
 773                         n_suites += 2;
 774
 775                 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128,
 776                  * BIP-GMAC-256
 777                  */
 778                 if (have_mfp)
 779                         n_suites += 4;
 780
 781                 suites = kmalloc(sizeof(u32) * n_suites, GFP_KERNEL);
 782                 if (!suites)
 783                         return -ENOMEM;
 784
 785                 suites[w++] = WLAN_CIPHER_SUITE_CCMP;
 786                 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256;
 787                 suites[w++] = WLAN_CIPHER_SUITE_TKIP;
 788                 suites[w++] = WLAN_CIPHER_SUITE_GCMP;
 789                 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256;
 790
 791                 if (have_wep) {
 792                         suites[w++] = WLAN_CIPHER_SUITE_WEP40;
 793                         suites[w++] = WLAN_CIPHER_SUITE_WEP104;
 794                 }
 795
 796                 if (have_mfp) {
 797                         suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC;
 798                         suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256;
 799                         suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128;
 800                         suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256;
 801                 }
 802
 803                 for (r = 0; r < local->hw.n_cipher_schemes; r++) {
 804                         suites[w++] = cs[r].cipher;
 805                         if (WARN_ON(cs[r].pn_len > IEEE80211_MAX_PN_LEN)) {
 806                                 kfree(suites);
 807                                 return -EINVAL;
 808                         }
 809                 }
 810         }
 811
 812         local->hw.wiphy->cipher_suites = suites;
 813         local->hw.wiphy->n_cipher_suites = w;
 814         local->wiphy_ciphers_allocated = true;
 815
 816         return 0;
 817 }
 818
 819 int ieee80211_register_hw(struct ieee80211_hw *hw)
 820 {
 821         struct ieee80211_local *local = hw_to_local(hw);
 822         int result, i;
 823         enum nl80211_band band;
 824         int channels, max_bitrates;
 825         bool supp_ht, supp_vht;
 826         netdev_features_t feature_whitelist;
 827         struct cfg80211_chan_def dflt_chandef = {};
 828
 829         if (ieee80211_hw_check(hw, QUEUE_CONTROL) &&
 830             (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
 831              local->hw.offchannel_tx_hw_queue >= local->hw.queues))
 832                 return -EINVAL;
 833
 834         if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
 835             (!local->ops->tdls_channel_switch ||
 836              !local->ops->tdls_cancel_channel_switch ||
 837              !local->ops->tdls_recv_channel_switch))
 838                 return -EOPNOTSUPP;
 839
 840         if (WARN_ON(local->hw.wiphy->interface_modes &
 841                         BIT(NL80211_IFTYPE_NAN) &&
 842                     (!local->ops->start_nan || !local->ops->stop_nan)))
 843                 return -EINVAL;
 844
 845 #ifdef CONFIG_PM
 846         if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
 847                 return -EINVAL;
 848 #endif
 849
 850         if (!local->use_chanctx) {
 851                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
 852                         const struct ieee80211_iface_combination *comb;
 853
 854                         comb = &local->hw.wiphy->iface_combinations[i];
 855
 856                         if (comb->num_different_channels > 1)
 857                                 return -EINVAL;
 858                 }
 859         } else {
 860                 /*
 861                  * WDS is currently prohibited when channel contexts are used
 862                  * because there's no clear definition of which channel WDS
 863                  * type interfaces use
 864                  */
 865                 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
 866                         return -EINVAL;
 867
 868                 /* DFS is not supported with multi-channel combinations yet */
 869                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
 870                         const struct ieee80211_iface_combination *comb;
 871
 872                         comb = &local->hw.wiphy->iface_combinations[i];
 873
 874                         if (comb->radar_detect_widths &&
 875                             comb->num_different_channels > 1)
 876                                 return -EINVAL;
 877                 }
 878         }
 879
 880         /* Only HW csum features are currently compatible with mac80211 */
 881         feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
 882                             NETIF_F_HW_CSUM | NETIF_F_SG | NETIF_F_HIGHDMA |
 883                             NETIF_F_GSO_SOFTWARE | NETIF_F_RXCSUM;
 884         if (WARN_ON(hw->netdev_features & ~feature_whitelist))
 885                 return -EINVAL;
 886
 887         if (hw->max_report_rates == 0)
 888                 hw->max_report_rates = hw->max_rates;
 889
 890         local->rx_chains = 1;
 891
 892         /*
 893          * generic code guarantees at least one band,
 894          * set this very early because much code assumes
 895          * that hw.conf.channel is assigned
 896          */
 897         channels = 0;
 898         max_bitrates = 0;
 899         supp_ht = false;
 900         supp_vht = false;
 901         for (band = 0; band < NUM_NL80211_BANDS; band++) {
 902                 struct ieee80211_supported_band *sband;
 903
 904                 sband = local->hw.wiphy->bands[band];
 905                 if (!sband)
 906                         continue;
 907
 908                 if (!dflt_chandef.chan) {
 909                         /*
 910                          * Assign the first enabled channel to dflt_chandef
 911                          * from the list of channels
 912                          */
 913                         for (i = 0; i < sband->n_channels; i++)
 914                                 if (!(sband->channels[i].flags &
 915                                                 IEEE80211_CHAN_DISABLED))
 916                                         break;
 917                         /* if none found then use the first anyway */
 918                         if (i == sband->n_channels)
 919                                 i = 0;
 920                         cfg80211_chandef_create(&dflt_chandef,
 921                                                 &sband->channels[i],
 922                                                 NL80211_CHAN_NO_HT);
 923                         /* init channel we're on */
 924                         if (!local->use_chanctx && !local->_oper_chandef.chan) {
 925                                 local->hw.conf.chandef = dflt_chandef;
 926                                 local->_oper_chandef = dflt_chandef;
 927                         }
 928                         local->monitor_chandef = dflt_chandef;
 929                 }
 930
 931                 channels += sband->n_channels;
 932
 933                 if (max_bitrates < sband->n_bitrates)
 934                         max_bitrates = sband->n_bitrates;
 935                 supp_ht = supp_ht || sband->ht_cap.ht_supported;
 936                 supp_vht = supp_vht || sband->vht_cap.vht_supported;
 937
 938                 if (!sband->ht_cap.ht_supported)
 939                         continue;
 940
 941                 /* TODO: consider VHT for RX chains, hopefully it's the same */
 942                 local->rx_chains =
 943                         max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
 944                             local->rx_chains);
 945
 946                 /* no need to mask, SM_PS_DISABLED has all bits set */
 947                 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
 948                                      IEEE80211_HT_CAP_SM_PS_SHIFT;
 949         }
 950
 951         /* if low-level driver supports AP, we also support VLAN */
 952         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
 953                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
 954                 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
 955         }
 956
 957         /* mac80211 always supports monitor */
 958         hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
 959         hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
 960
 961         /* mac80211 doesn't support more than one IBSS interface right now */
 962         for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
 963                 const struct ieee80211_iface_combination *c;
 964                 int j;
 965
 966                 c = &hw->wiphy->iface_combinations[i];
 967
 968                 for (j = 0; j < c->n_limits; j++)
 969                         if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
 970                             c->limits[j].max > 1)
 971                                 return -EINVAL;
 972         }
 973
 974         local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
 975                                       sizeof(void *) * channels, GFP_KERNEL);
 976         if (!local->int_scan_req)
 977                 return -ENOMEM;
 978
 979         for (band = 0; band < NUM_NL80211_BANDS; band++) {
 980                 if (!local->hw.wiphy->bands[band])
 981                         continue;
 982                 local->int_scan_req->rates[band] = (u32) -1;
 983         }
 984
 985 #ifndef CONFIG_MAC80211_MESH
 986         /* mesh depends on Kconfig, but drivers should set it if they want */
 987         local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
 988 #endif
 989
 990         /* if the underlying driver supports mesh, mac80211 will (at least)
 991          * provide routing of mesh authentication frames to userspace */
 992         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
 993                 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
 994
 995         /* mac80211 supports control port protocol changing */
 996         local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
 997
 998         if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) {
 999                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
1000         } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) {
1001                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
1002                 if (hw->max_signal <= 0) {
1003                         result = -EINVAL;
1004                         goto fail_wiphy_register;
1005                 }
1006         }
1007
1008         /*
1009          * Calculate scan IE length -- we need this to alloc
1010          * memory and to subtract from the driver limit. It
1011          * includes the DS Params, (extended) supported rates, and HT
1012          * information -- SSID is the driver's responsibility.
1013          */
1014         local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
1015                 3 /* DS Params */;
1016         if (supp_ht)
1017                 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
1018
1019         if (supp_vht)
1020                 local->scan_ies_len +=
1021                         2 + sizeof(struct ieee80211_vht_cap);
1022
1023         if (!local->ops->hw_scan) {
1024                 /* For hw_scan, driver needs to set these up. */
1025                 local->hw.wiphy->max_scan_ssids = 4;
1026                 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
1027         }
1028
1029         /*
1030          * If the driver supports any scan IEs, then assume the
1031          * limit includes the IEs mac80211 will add, otherwise
1032          * leave it at zero and let the driver sort it out; we
1033          * still pass our IEs to the driver but userspace will
1034          * not be allowed to in that case.
1035          */
1036         if (local->hw.wiphy->max_scan_ie_len)
1037                 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
1038
1039         if (WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes,
1040                                              local->hw.n_cipher_schemes))) {
1041                 result = -EINVAL;
1042                 goto fail_workqueue;
1043         }
1044
1045         result = ieee80211_init_cipher_suites(local);
1046         if (result < 0)
1047                 goto fail_wiphy_register;
1048
1049         if (!local->ops->remain_on_channel)
1050                 local->hw.wiphy->max_remain_on_channel_duration = 5000;
1051
1052         /* mac80211 based drivers don't support internal TDLS setup */
1053         if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
1054                 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
1055
1056         /* mac80211 supports eCSA, if the driver supports STA CSA at all */
1057         if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA))
1058                 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
1059
1060         local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM;
1061
1062         result = wiphy_register(local->hw.wiphy);
1063         if (result < 0)
1064                 goto fail_wiphy_register;
1065
1066         /*
1067          * We use the number of queues for feature tests (QoS, HT) internally
1068          * so restrict them appropriately.
1069          */
1070         if (hw->queues > IEEE80211_MAX_QUEUES)
1071                 hw->queues = IEEE80211_MAX_QUEUES;
1072
1073         local->workqueue =
1074                 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1075         if (!local->workqueue) {
1076                 result = -ENOMEM;
1077                 goto fail_workqueue;
1078         }
1079
1080         /*
1081          * The hardware needs headroom for sending the frame,
1082          * and we need some headroom for passing the frame to monitor
1083          * interfaces, but never both at the same time.
1084          */
1085         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1086                                    IEEE80211_TX_STATUS_HEADROOM);
1087
1088         debugfs_hw_add(local);
1089
1090         /*
1091          * if the driver doesn't specify a max listen interval we
1092          * use 5 which should be a safe default
1093          */
1094         if (local->hw.max_listen_interval == 0)
1095                 local->hw.max_listen_interval = 5;
1096
1097         local->hw.conf.listen_interval = local->hw.max_listen_interval;
1098
1099         local->dynamic_ps_forced_timeout = -1;
1100
1101         if (!local->hw.max_nan_de_entries)
1102                 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID;
1103
1104         result = ieee80211_wep_init(local);
1105         if (result < 0)
1106                 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
1107                             result);
1108
1109         local->hw.conf.flags = IEEE80211_CONF_IDLE;
1110
1111         ieee80211_led_init(local);
1112
1113         rtnl_lock();
1114
1115         result = ieee80211_init_rate_ctrl_alg(local,
1116                                               hw->rate_control_algorithm);
1117         if (result < 0) {
1118                 wiphy_debug(local->hw.wiphy,
1119                             "Failed to initialize rate control algorithm\n");
1120                 goto fail_rate;
1121         }
1122
1123         /* add one default STA interface if supported */
1124         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1125             !ieee80211_hw_check(hw, NO_AUTO_VIF)) {
1126                 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1127                                           NL80211_IFTYPE_STATION, NULL);
1128                 if (result)
1129                         wiphy_warn(local->hw.wiphy,
1130                                    "Failed to add default virtual iface\n");
1131         }
1132
1133         rtnl_unlock();
1134
1135         result = ieee80211_txq_setup_flows(local);
1136         if (result)
1137                 goto fail_flows;
1138
1139 #ifdef CONFIG_INET
1140         local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1141         result = register_inetaddr_notifier(&local->ifa_notifier);
1142         if (result)
1143                 goto fail_ifa;
1144 #endif
1145
1146 #if IS_ENABLED(CONFIG_IPV6)
1147         local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1148         result = register_inet6addr_notifier(&local->ifa6_notifier);
1149         if (result)
1150                 goto fail_ifa6;
1151 #endif
1152
1153         return 0;
1154
1155 #if IS_ENABLED(CONFIG_IPV6)
1156  fail_ifa6:
1157 #ifdef CONFIG_INET
1158         unregister_inetaddr_notifier(&local->ifa_notifier);
1159 #endif
1160 #endif
1161 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1162  fail_ifa:
1163 #endif
1164         ieee80211_txq_teardown_flows(local);
1165  fail_flows:
1166         rtnl_lock();
1167         rate_control_deinitialize(local);
1168         ieee80211_remove_interfaces(local);
1169  fail_rate:
1170         rtnl_unlock();
1171         ieee80211_led_exit(local);
1172         ieee80211_wep_free(local);
1173         destroy_workqueue(local->workqueue);
1174  fail_workqueue:
1175         wiphy_unregister(local->hw.wiphy);
1176  fail_wiphy_register:
1177         if (local->wiphy_ciphers_allocated)
1178                 kfree(local->hw.wiphy->cipher_suites);
1179         kfree(local->int_scan_req);
1180         return result;
1181 }
1182 EXPORT_SYMBOL(ieee80211_register_hw);
1183
1184 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1185 {
1186         struct ieee80211_local *local = hw_to_local(hw);
1187
1188         tasklet_kill(&local->tx_pending_tasklet);
1189         tasklet_kill(&local->tasklet);
1190
1191 #ifdef CONFIG_INET
1192         unregister_inetaddr_notifier(&local->ifa_notifier);
1193 #endif
1194 #if IS_ENABLED(CONFIG_IPV6)
1195         unregister_inet6addr_notifier(&local->ifa6_notifier);
1196 #endif
1197         ieee80211_txq_teardown_flows(local);
1198
1199         rtnl_lock();
1200
1201         /*
1202          * At this point, interface list manipulations are fine
1203          * because the driver cannot be handing us frames any
1204          * more and the tasklet is killed.
1205          */
1206         ieee80211_remove_interfaces(local);
1207
1208         rtnl_unlock();
1209
1210         cancel_delayed_work_sync(&local->roc_work);
1211         cancel_work_sync(&local->restart_work);
1212         cancel_work_sync(&local->reconfig_filter);
1213         cancel_work_sync(&local->tdls_chsw_work);
1214         flush_work(&local->sched_scan_stopped_work);
1215
1216         ieee80211_clear_tx_pending(local);
1217         rate_control_deinitialize(local);
1218
1219         if (skb_queue_len(&local->skb_queue) ||
1220             skb_queue_len(&local->skb_queue_unreliable))
1221                 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1222         skb_queue_purge(&local->skb_queue);
1223         skb_queue_purge(&local->skb_queue_unreliable);
1224         skb_queue_purge(&local->skb_queue_tdls_chsw);
1225
1226         destroy_workqueue(local->workqueue);
1227         wiphy_unregister(local->hw.wiphy);
1228         ieee80211_wep_free(local);
1229         ieee80211_led_exit(local);
1230         kfree(local->int_scan_req);
1231 }
1232 EXPORT_SYMBOL(ieee80211_unregister_hw);
1233
1234 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1235 {
1236         WARN_ONCE(1, "Have pending ack frames!\n");
1237         kfree_skb(p);
1238         return 0;
1239 }
1240
1241 void ieee80211_free_hw(struct ieee80211_hw *hw)
1242 {
1243         struct ieee80211_local *local = hw_to_local(hw);
1244
1245         mutex_destroy(&local->iflist_mtx);
1246         mutex_destroy(&local->mtx);
1247
1248         if (local->wiphy_ciphers_allocated)
1249                 kfree(local->hw.wiphy->cipher_suites);
1250
1251         idr_for_each(&local->ack_status_frames,
1252                      ieee80211_free_ack_frame, NULL);
1253         idr_destroy(&local->ack_status_frames);
1254
1255         sta_info_stop(local);
1256
1257         ieee80211_free_led_names(local);
1258
1259         wiphy_free(local->hw.wiphy);
1260 }
1261 EXPORT_SYMBOL(ieee80211_free_hw);
1262
1263 static int __init ieee80211_init(void)
1264 {
1265         struct sk_buff *skb;
1266         int ret;
1267
1268         BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1269         BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1270                      IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1271
1272         ret = rc80211_minstrel_init();
1273         if (ret)
1274                 return ret;
1275
1276         ret = rc80211_minstrel_ht_init();
1277         if (ret)
1278                 goto err_minstrel;
1279
1280         ret = ieee80211_iface_init();
1281         if (ret)
1282                 goto err_netdev;
1283
1284         return 0;
1285  err_netdev:
1286         rc80211_minstrel_ht_exit();
1287  err_minstrel:
1288         rc80211_minstrel_exit();
1289
1290         return ret;
1291 }
1292
1293 static void __exit ieee80211_exit(void)
1294 {
1295         rc80211_minstrel_ht_exit();
1296         rc80211_minstrel_exit();
1297
1298         ieee80211s_stop();
1299
1300         ieee80211_iface_exit();
1301
1302         rcu_barrier();
1303 }
1304
1305
1306 subsys_initcall(ieee80211_init);
1307 module_exit(ieee80211_exit);
1308
1309 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1310 MODULE_LICENSE("GPL");