net/mac80211/main.c

   1 /*
   2  * Copyright 2002-2005, Instant802 Networks, Inc.
   3  * Copyright 2005-2006, Devicescape Software, Inc.
   4  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   5  * Copyright 2013-2014  Intel Mobile Communications GmbH
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11
  12 #include <net/mac80211.h>
  13 #include <linux/module.h>
  14 #include <linux/init.h>
  15 #include <linux/netdevice.h>
  16 #include <linux/types.h>
  17 #include <linux/slab.h>
  18 #include <linux/skbuff.h>
  19 #include <linux/etherdevice.h>
  20 #include <linux/if_arp.h>
  21 #include <linux/rtnetlink.h>
  22 #include <linux/bitmap.h>
  23 #include <linux/inetdevice.h>
  24 #include <net/net_namespace.h>
  25 #include <net/cfg80211.h>
  26 #include <net/addrconf.h>
  27
  28 #include "ieee80211_i.h"
  29 #include "driver-ops.h"
  30 #include "rate.h"
  31 #include "mesh.h"
  32 #include "wep.h"
  33 #include "led.h"
  34 #include "debugfs.h"
  35
  36 void ieee80211_configure_filter(struct ieee80211_local *local)
  37 {
  38         u64 mc;
  39         unsigned int changed_flags;
  40         unsigned int new_flags = 0;
  41
  42         if (atomic_read(&local->iff_allmultis))
  43                 new_flags |= FIF_ALLMULTI;
  44
  45         if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) ||
  46             test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning))
  47                 new_flags |= FIF_BCN_PRBRESP_PROMISC;
  48
  49         if (local->fif_probe_req || local->probe_req_reg)
  50                 new_flags |= FIF_PROBE_REQ;
  51
  52         if (local->fif_fcsfail)
  53                 new_flags |= FIF_FCSFAIL;
  54
  55         if (local->fif_plcpfail)
  56                 new_flags |= FIF_PLCPFAIL;
  57
  58         if (local->fif_control)
  59                 new_flags |= FIF_CONTROL;
  60
  61         if (local->fif_other_bss)
  62                 new_flags |= FIF_OTHER_BSS;
  63
  64         if (local->fif_pspoll)
  65                 new_flags |= FIF_PSPOLL;
  66
  67         spin_lock_bh(&local->filter_lock);
  68         changed_flags = local->filter_flags ^ new_flags;
  69
  70         mc = drv_prepare_multicast(local, &local->mc_list);
  71         spin_unlock_bh(&local->filter_lock);
  72
  73         /* be a bit nasty */
  74         new_flags |= (1<<31);
  75
  76         drv_configure_filter(local, changed_flags, &new_flags, mc);
  77
  78         WARN_ON(new_flags & (1<<31));
  79
  80         local->filter_flags = new_flags & ~(1<<31);
  81 }
  82
  83 static void ieee80211_reconfig_filter(struct work_struct *work)
  84 {
  85         struct ieee80211_local *local =
  86                 container_of(work, struct ieee80211_local, reconfig_filter);
  87
  88         ieee80211_configure_filter(local);
  89 }
  90
  91 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
  92 {
  93         struct ieee80211_sub_if_data *sdata;
  94         struct cfg80211_chan_def chandef = {};
  95         u32 changed = 0;
  96         int power;
  97         u32 offchannel_flag;
  98
  99         offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
 100
 101         if (local->scan_chandef.chan) {
 102                 chandef = local->scan_chandef;
 103         } else if (local->tmp_channel) {
 104                 chandef.chan = local->tmp_channel;
 105                 chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
 106                 chandef.center_freq1 = chandef.chan->center_freq;
 107         } else
 108                 chandef = local->_oper_chandef;
 109
 110         WARN(!cfg80211_chandef_valid(&chandef),
 111              "control:%d MHz width:%d center: %d/%d MHz",
 112              chandef.chan->center_freq, chandef.width,
 113              chandef.center_freq1, chandef.center_freq2);
 114
 115         if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef))
 116                 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
 117         else
 118                 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
 119
 120         offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
 121
 122         if (offchannel_flag ||
 123             !cfg80211_chandef_identical(&local->hw.conf.chandef,
 124                                         &local->_oper_chandef)) {
 125                 local->hw.conf.chandef = chandef;
 126                 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
 127         }
 128
 129         if (!conf_is_ht(&local->hw.conf)) {
 130                 /*
 131                  * mac80211.h documents that this is only valid
 132                  * when the channel is set to an HT type, and
 133                  * that otherwise STATIC is used.
 134                  */
 135                 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
 136         } else if (local->hw.conf.smps_mode != local->smps_mode) {
 137                 local->hw.conf.smps_mode = local->smps_mode;
 138                 changed |= IEEE80211_CONF_CHANGE_SMPS;
 139         }
 140
 141         power = ieee80211_chandef_max_power(&chandef);
 142
 143         rcu_read_lock();
 144         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 145                 if (!rcu_access_pointer(sdata->vif.chanctx_conf))
 146                         continue;
 147                 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
 148                         continue;
 149                 power = min(power, sdata->vif.bss_conf.txpower);
 150         }
 151         rcu_read_unlock();
 152
 153         if (local->hw.conf.power_level != power) {
 154                 changed |= IEEE80211_CONF_CHANGE_POWER;
 155                 local->hw.conf.power_level = power;
 156         }
 157
 158         return changed;
 159 }
 160
 161 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
 162 {
 163         int ret = 0;
 164
 165         might_sleep();
 166
 167         if (!local->use_chanctx)
 168                 changed |= ieee80211_hw_conf_chan(local);
 169         else
 170                 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
 171                              IEEE80211_CONF_CHANGE_POWER);
 172
 173         if (changed && local->open_count) {
 174                 ret = drv_config(local, changed);
 175                 /*
 176                  * Goal:
 177                  * HW reconfiguration should never fail, the driver has told
 178                  * us what it can support so it should live up to that promise.
 179                  *
 180                  * Current status:
 181                  * rfkill is not integrated with mac80211 and a
 182                  * configuration command can thus fail if hardware rfkill
 183                  * is enabled
 184                  *
 185                  * FIXME: integrate rfkill with mac80211 and then add this
 186                  * WARN_ON() back
 187                  *
 188                  */
 189                 /* WARN_ON(ret); */
 190         }
 191
 192         return ret;
 193 }
 194
 195 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
 196                                       u32 changed)
 197 {
 198         struct ieee80211_local *local = sdata->local;
 199
 200         if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
 201                 return;
 202
 203         drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
 204 }
 205
 206 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
 207 {
 208         sdata->vif.bss_conf.use_cts_prot = false;
 209         sdata->vif.bss_conf.use_short_preamble = false;
 210         sdata->vif.bss_conf.use_short_slot = false;
 211         return BSS_CHANGED_ERP_CTS_PROT |
 212                BSS_CHANGED_ERP_PREAMBLE |
 213                BSS_CHANGED_ERP_SLOT;
 214 }
 215
 216 static void ieee80211_tasklet_handler(unsigned long data)
 217 {
 218         struct ieee80211_local *local = (struct ieee80211_local *) data;
 219         struct sk_buff *skb;
 220
 221         while ((skb = skb_dequeue(&local->skb_queue)) ||
 222                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
 223                 switch (skb->pkt_type) {
 224                 case IEEE80211_RX_MSG:
 225                         /* Clear skb->pkt_type in order to not confuse kernel
 226                          * netstack. */
 227                         skb->pkt_type = 0;
 228                         ieee80211_rx(&local->hw, skb);
 229                         break;
 230                 case IEEE80211_TX_STATUS_MSG:
 231                         skb->pkt_type = 0;
 232                         ieee80211_tx_status(&local->hw, skb);
 233                         break;
 234                 default:
 235                         WARN(1, "mac80211: Packet is of unknown type %d\n",
 236                              skb->pkt_type);
 237                         dev_kfree_skb(skb);
 238                         break;
 239                 }
 240         }
 241 }
 242
 243 static void ieee80211_restart_work(struct work_struct *work)
 244 {
 245         struct ieee80211_local *local =
 246                 container_of(work, struct ieee80211_local, restart_work);
 247         struct ieee80211_sub_if_data *sdata;
 248
 249         /* wait for scan work complete */
 250         flush_workqueue(local->workqueue);
 251         flush_work(&local->sched_scan_stopped_work);
 252
 253         WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
 254              "%s called with hardware scan in progress\n", __func__);
 255
 256         flush_work(&local->radar_detected_work);
 257         rtnl_lock();
 258         list_for_each_entry(sdata, &local->interfaces, list)
 259                 flush_delayed_work(&sdata->dec_tailroom_needed_wk);
 260         ieee80211_scan_cancel(local);
 261
 262         /* make sure any new ROC will consider local->in_reconfig */
 263         flush_delayed_work(&local->roc_work);
 264         flush_work(&local->hw_roc_done);
 265
 266         /* wait for all packet processing to be done */
 267         synchronize_net();
 268
 269         ieee80211_reconfig(local);
 270         rtnl_unlock();
 271 }
 272
 273 void ieee80211_restart_hw(struct ieee80211_hw *hw)
 274 {
 275         struct ieee80211_local *local = hw_to_local(hw);
 276
 277         trace_api_restart_hw(local);
 278
 279         wiphy_info(hw->wiphy,
 280                    "Hardware restart was requested\n");
 281
 282         /* use this reason, ieee80211_reconfig will unblock it */
 283         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 284                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
 285                                         false);
 286
 287         /*
 288          * Stop all Rx during the reconfig. We don't want state changes
 289          * or driver callbacks while this is in progress.
 290          */
 291         local->in_reconfig = true;
 292         barrier();
 293
 294         queue_work(system_freezable_wq, &local->restart_work);
 295 }
 296 EXPORT_SYMBOL(ieee80211_restart_hw);
 297
 298 #ifdef CONFIG_INET
 299 static int ieee80211_ifa_changed(struct notifier_block *nb,
 300                                  unsigned long data, void *arg)
 301 {
 302         struct in_ifaddr *ifa = arg;
 303         struct ieee80211_local *local =
 304                 container_of(nb, struct ieee80211_local,
 305                              ifa_notifier);
 306         struct net_device *ndev = ifa->ifa_dev->dev;
 307         struct wireless_dev *wdev = ndev->ieee80211_ptr;
 308         struct in_device *idev;
 309         struct ieee80211_sub_if_data *sdata;
 310         struct ieee80211_bss_conf *bss_conf;
 311         struct ieee80211_if_managed *ifmgd;
 312         int c = 0;
 313
 314         /* Make sure it's our interface that got changed */
 315         if (!wdev)
 316                 return NOTIFY_DONE;
 317
 318         if (wdev->wiphy != local->hw.wiphy)
 319                 return NOTIFY_DONE;
 320
 321         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
 322         bss_conf = &sdata->vif.bss_conf;
 323
 324         /* ARP filtering is only supported in managed mode */
 325         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 326                 return NOTIFY_DONE;
 327
 328         idev = __in_dev_get_rtnl(sdata->dev);
 329         if (!idev)
 330                 return NOTIFY_DONE;
 331
 332         ifmgd = &sdata->u.mgd;
 333         sdata_lock(sdata);
 334
 335         /* Copy the addresses to the bss_conf list */
 336         ifa = idev->ifa_list;
 337         while (ifa) {
 338                 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
 339                         bss_conf->arp_addr_list[c] = ifa->ifa_address;
 340                 ifa = ifa->ifa_next;
 341                 c++;
 342         }
 343
 344         bss_conf->arp_addr_cnt = c;
 345
 346         /* Configure driver only if associated (which also implies it is up) */
 347         if (ifmgd->associated)
 348                 ieee80211_bss_info_change_notify(sdata,
 349                                                  BSS_CHANGED_ARP_FILTER);
 350
 351         sdata_unlock(sdata);
 352
 353         return NOTIFY_OK;
 354 }
 355 #endif
 356
 357 #if IS_ENABLED(CONFIG_IPV6)
 358 static int ieee80211_ifa6_changed(struct notifier_block *nb,
 359                                   unsigned long data, void *arg)
 360 {
 361         struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
 362         struct inet6_dev *idev = ifa->idev;
 363         struct net_device *ndev = ifa->idev->dev;
 364         struct ieee80211_local *local =
 365                 container_of(nb, struct ieee80211_local, ifa6_notifier);
 366         struct wireless_dev *wdev = ndev->ieee80211_ptr;
 367         struct ieee80211_sub_if_data *sdata;
 368
 369         /* Make sure it's our interface that got changed */
 370         if (!wdev || wdev->wiphy != local->hw.wiphy)
 371                 return NOTIFY_DONE;
 372
 373         sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
 374
 375         /*
 376          * For now only support station mode. This is mostly because
 377          * doing AP would have to handle AP_VLAN in some way ...
 378          */
 379         if (sdata->vif.type != NL80211_IFTYPE_STATION)
 380                 return NOTIFY_DONE;
 381
 382         drv_ipv6_addr_change(local, sdata, idev);
 383
 384         return NOTIFY_OK;
 385 }
 386 #endif
 387
 388 /* There isn't a lot of sense in it, but you can transmit anything you like */
 389 static const struct ieee80211_txrx_stypes
 390 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
 391         [NL80211_IFTYPE_ADHOC] = {
 392                 .tx = 0xffff,
 393                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 394                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 395                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 396                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 397         },
 398         [NL80211_IFTYPE_STATION] = {
 399                 .tx = 0xffff,
 400                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 401                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 402         },
 403         [NL80211_IFTYPE_AP] = {
 404                 .tx = 0xffff,
 405                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 406                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 407                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 408                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 409                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 410                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 411                         BIT(IEEE80211_STYPE_ACTION >> 4),
 412         },
 413         [NL80211_IFTYPE_AP_VLAN] = {
 414                 /* copy AP */
 415                 .tx = 0xffff,
 416                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 417                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 418                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 419                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 420                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 421                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 422                         BIT(IEEE80211_STYPE_ACTION >> 4),
 423         },
 424         [NL80211_IFTYPE_P2P_CLIENT] = {
 425                 .tx = 0xffff,
 426                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 427                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 428         },
 429         [NL80211_IFTYPE_P2P_GO] = {
 430                 .tx = 0xffff,
 431                 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
 432                         BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
 433                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 434                         BIT(IEEE80211_STYPE_DISASSOC >> 4) |
 435                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 436                         BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 437                         BIT(IEEE80211_STYPE_ACTION >> 4),
 438         },
 439         [NL80211_IFTYPE_MESH_POINT] = {
 440                 .tx = 0xffff,
 441                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 442                         BIT(IEEE80211_STYPE_AUTH >> 4) |
 443                         BIT(IEEE80211_STYPE_DEAUTH >> 4),
 444         },
 445         [NL80211_IFTYPE_P2P_DEVICE] = {
 446                 .tx = 0xffff,
 447                 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 448                         BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 449         },
 450 };
 451
 452 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
 453         .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
 454                              IEEE80211_HT_AMPDU_PARM_DENSITY,
 455
 456         .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
 457                                 IEEE80211_HT_CAP_MAX_AMSDU |
 458                                 IEEE80211_HT_CAP_SGI_20 |
 459                                 IEEE80211_HT_CAP_SGI_40 |
 460                                 IEEE80211_HT_CAP_LDPC_CODING |
 461                                 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
 462         .mcs = {
 463                 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
 464                              0xff, 0xff, 0xff, 0xff, 0xff, },
 465         },
 466 };
 467
 468 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
 469         .vht_cap_info =
 470                 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
 471                             IEEE80211_VHT_CAP_SHORT_GI_80 |
 472                             IEEE80211_VHT_CAP_SHORT_GI_160 |
 473                             IEEE80211_VHT_CAP_RXSTBC_1 |
 474                             IEEE80211_VHT_CAP_RXSTBC_2 |
 475                             IEEE80211_VHT_CAP_RXSTBC_3 |
 476                             IEEE80211_VHT_CAP_RXSTBC_4 |
 477                             IEEE80211_VHT_CAP_TXSTBC |
 478                             IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
 479                             IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
 480                             IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
 481                             IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
 482                             IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
 483         .supp_mcs = {
 484                 .rx_mcs_map = cpu_to_le16(~0),
 485                 .tx_mcs_map = cpu_to_le16(~0),
 486         },
 487 };
 488
 489 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
 490                                            const struct ieee80211_ops *ops,
 491                                            const char *requested_name)
 492 {
 493         struct ieee80211_local *local;
 494         int priv_size, i;
 495         struct wiphy *wiphy;
 496         bool use_chanctx;
 497
 498         if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
 499                     !ops->add_interface || !ops->remove_interface ||
 500                     !ops->configure_filter))
 501                 return NULL;
 502
 503         if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
 504                 return NULL;
 505
 506         /* check all or no channel context operations exist */
 507         i = !!ops->add_chanctx + !!ops->remove_chanctx +
 508             !!ops->change_chanctx + !!ops->assign_vif_chanctx +
 509             !!ops->unassign_vif_chanctx;
 510         if (WARN_ON(i != 0 && i != 5))
 511                 return NULL;
 512         use_chanctx = i == 5;
 513
 514         /* Ensure 32-byte alignment of our private data and hw private data.
 515          * We use the wiphy priv data for both our ieee80211_local and for
 516          * the driver's private data
 517          *
 518          * In memory it'll be like this:
 519          *
 520          * +-------------------------+
 521          * | struct wiphy           |
 522          * +-------------------------+
 523          * | struct ieee80211_local  |
 524          * +-------------------------+
 525          * | driver's private data   |
 526          * +-------------------------+
 527          *
 528          */
 529         priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
 530
 531         wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
 532
 533         if (!wiphy)
 534                 return NULL;
 535
 536         wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
 537
 538         wiphy->privid = mac80211_wiphy_privid;
 539
 540         wiphy->flags |= WIPHY_FLAG_NETNS_OK |
 541                         WIPHY_FLAG_4ADDR_AP |
 542                         WIPHY_FLAG_4ADDR_STATION |
 543                         WIPHY_FLAG_REPORTS_OBSS |
 544                         WIPHY_FLAG_OFFCHAN_TX;
 545
 546         if (ops->remain_on_channel)
 547                 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
 548
 549         wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
 550                            NL80211_FEATURE_SAE |
 551                            NL80211_FEATURE_HT_IBSS |
 552                            NL80211_FEATURE_VIF_TXPOWER |
 553                            NL80211_FEATURE_MAC_ON_CREATE |
 554                            NL80211_FEATURE_USERSPACE_MPM |
 555                            NL80211_FEATURE_FULL_AP_CLIENT_STATE;
 556         wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA);
 557         wiphy_ext_feature_set(wiphy,
 558                               NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211);
 559
 560         if (!ops->hw_scan)
 561                 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
 562                                    NL80211_FEATURE_AP_SCAN;
 563
 564
 565         if (!ops->set_key)
 566                 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 567
 568         wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM);
 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         INIT_LIST_HEAD(&local->mon_list);
 613
 614         __hw_addr_init(&local->mc_list);
 615
 616         mutex_init(&local->iflist_mtx);
 617         mutex_init(&local->mtx);
 618
 619         mutex_init(&local->key_mtx);
 620         spin_lock_init(&local->filter_lock);
 621         spin_lock_init(&local->rx_path_lock);
 622         spin_lock_init(&local->queue_stop_reason_lock);
 623
 624         INIT_LIST_HEAD(&local->chanctx_list);
 625         mutex_init(&local->chanctx_mtx);
 626
 627         INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
 628
 629         INIT_WORK(&local->restart_work, ieee80211_restart_work);
 630
 631         INIT_WORK(&local->radar_detected_work,
 632                   ieee80211_dfs_radar_detected_work);
 633
 634         INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
 635         local->smps_mode = IEEE80211_SMPS_OFF;
 636
 637         INIT_WORK(&local->dynamic_ps_enable_work,
 638                   ieee80211_dynamic_ps_enable_work);
 639         INIT_WORK(&local->dynamic_ps_disable_work,
 640                   ieee80211_dynamic_ps_disable_work);
 641         timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0);
 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         local->hw.radiotap_timestamp.units_pos = -1;
 671         local->hw.radiotap_timestamp.accuracy = -1;
 672
 673         return &local->hw;
 674  err_free:
 675         wiphy_free(wiphy);
 676         return NULL;
 677 }
 678 EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
 679
 680 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
 681 {
 682         bool have_wep = !(IS_ERR(local->wep_tx_tfm) ||
 683                           IS_ERR(local->wep_rx_tfm));
 684         bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE);
 685         int n_suites = 0, r = 0, w = 0;
 686         u32 *suites;
 687         static const u32 cipher_suites[] = {
 688                 /* keep WEP first, it may be removed below */
 689                 WLAN_CIPHER_SUITE_WEP40,
 690                 WLAN_CIPHER_SUITE_WEP104,
 691                 WLAN_CIPHER_SUITE_TKIP,
 692                 WLAN_CIPHER_SUITE_CCMP,
 693                 WLAN_CIPHER_SUITE_CCMP_256,
 694                 WLAN_CIPHER_SUITE_GCMP,
 695                 WLAN_CIPHER_SUITE_GCMP_256,
 696
 697                 /* keep last -- depends on hw flags! */
 698                 WLAN_CIPHER_SUITE_AES_CMAC,
 699                 WLAN_CIPHER_SUITE_BIP_CMAC_256,
 700                 WLAN_CIPHER_SUITE_BIP_GMAC_128,
 701                 WLAN_CIPHER_SUITE_BIP_GMAC_256,
 702         };
 703
 704         if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) ||
 705             local->hw.wiphy->cipher_suites) {
 706                 /* If the driver advertises, or doesn't support SW crypto,
 707                  * we only need to remove WEP if necessary.
 708                  */
 709                 if (have_wep)
 710                         return 0;
 711
 712                 /* well if it has _no_ ciphers ... fine */
 713                 if (!local->hw.wiphy->n_cipher_suites)
 714                         return 0;
 715
 716                 /* Driver provides cipher suites, but we need to exclude WEP */
 717                 suites = kmemdup(local->hw.wiphy->cipher_suites,
 718                                  sizeof(u32) * local->hw.wiphy->n_cipher_suites,
 719                                  GFP_KERNEL);
 720                 if (!suites)
 721                         return -ENOMEM;
 722
 723                 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
 724                         u32 suite = local->hw.wiphy->cipher_suites[r];
 725
 726                         if (suite == WLAN_CIPHER_SUITE_WEP40 ||
 727                             suite == WLAN_CIPHER_SUITE_WEP104)
 728                                 continue;
 729                         suites[w++] = suite;
 730                 }
 731         } else if (!local->hw.cipher_schemes) {
 732                 /* If the driver doesn't have cipher schemes, there's nothing
 733                  * else to do other than assign the (software supported and
 734                  * perhaps offloaded) cipher suites.
 735                  */
 736                 local->hw.wiphy->cipher_suites = cipher_suites;
 737                 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
 738
 739                 if (!have_mfp)
 740                         local->hw.wiphy->n_cipher_suites -= 4;
 741
 742                 if (!have_wep) {
 743                         local->hw.wiphy->cipher_suites += 2;
 744                         local->hw.wiphy->n_cipher_suites -= 2;
 745                 }
 746
 747                 /* not dynamically allocated, so just return */
 748                 return 0;
 749         } else {
 750                 const struct ieee80211_cipher_scheme *cs;
 751
 752                 cs = local->hw.cipher_schemes;
 753
 754                 /* Driver specifies cipher schemes only (but not cipher suites
 755                  * including the schemes)
 756                  *
 757                  * We start counting ciphers defined by schemes, TKIP, CCMP,
 758                  * CCMP-256, GCMP, and GCMP-256
 759                  */
 760                 n_suites = local->hw.n_cipher_schemes + 5;
 761
 762                 /* check if we have WEP40 and WEP104 */
 763                 if (have_wep)
 764                         n_suites += 2;
 765
 766                 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128,
 767                  * BIP-GMAC-256
 768                  */
 769                 if (have_mfp)
 770                         n_suites += 4;
 771
 772                 suites = kmalloc(sizeof(u32) * n_suites, GFP_KERNEL);
 773                 if (!suites)
 774                         return -ENOMEM;
 775
 776                 suites[w++] = WLAN_CIPHER_SUITE_CCMP;
 777                 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256;
 778                 suites[w++] = WLAN_CIPHER_SUITE_TKIP;
 779                 suites[w++] = WLAN_CIPHER_SUITE_GCMP;
 780                 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256;
 781
 782                 if (have_wep) {
 783                         suites[w++] = WLAN_CIPHER_SUITE_WEP40;
 784                         suites[w++] = WLAN_CIPHER_SUITE_WEP104;
 785                 }
 786
 787                 if (have_mfp) {
 788                         suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC;
 789                         suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256;
 790                         suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128;
 791                         suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256;
 792                 }
 793
 794                 for (r = 0; r < local->hw.n_cipher_schemes; r++) {
 795                         suites[w++] = cs[r].cipher;
 796                         if (WARN_ON(cs[r].pn_len > IEEE80211_MAX_PN_LEN)) {
 797                                 kfree(suites);
 798                                 return -EINVAL;
 799                         }
 800                 }
 801         }
 802
 803         local->hw.wiphy->cipher_suites = suites;
 804         local->hw.wiphy->n_cipher_suites = w;
 805         local->wiphy_ciphers_allocated = true;
 806
 807         return 0;
 808 }
 809
 810 int ieee80211_register_hw(struct ieee80211_hw *hw)
 811 {
 812         struct ieee80211_local *local = hw_to_local(hw);
 813         int result, i;
 814         enum nl80211_band band;
 815         int channels, max_bitrates;
 816         bool supp_ht, supp_vht;
 817         netdev_features_t feature_whitelist;
 818         struct cfg80211_chan_def dflt_chandef = {};
 819
 820         if (ieee80211_hw_check(hw, QUEUE_CONTROL) &&
 821             (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
 822              local->hw.offchannel_tx_hw_queue >= local->hw.queues))
 823                 return -EINVAL;
 824
 825         if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
 826             (!local->ops->tdls_channel_switch ||
 827              !local->ops->tdls_cancel_channel_switch ||
 828              !local->ops->tdls_recv_channel_switch))
 829                 return -EOPNOTSUPP;
 830
 831         if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) &&
 832                     !local->ops->set_frag_threshold))
 833                 return -EINVAL;
 834
 835         if (WARN_ON(local->hw.wiphy->interface_modes &
 836                         BIT(NL80211_IFTYPE_NAN) &&
 837                     (!local->ops->start_nan || !local->ops->stop_nan)))
 838                 return -EINVAL;
 839
 840 #ifdef CONFIG_PM
 841         if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
 842                 return -EINVAL;
 843 #endif
 844
 845         if (!local->use_chanctx) {
 846                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
 847                         const struct ieee80211_iface_combination *comb;
 848
 849                         comb = &local->hw.wiphy->iface_combinations[i];
 850
 851                         if (comb->num_different_channels > 1)
 852                                 return -EINVAL;
 853                 }
 854         } else {
 855                 /*
 856                  * WDS is currently prohibited when channel contexts are used
 857                  * because there's no clear definition of which channel WDS
 858                  * type interfaces use
 859                  */
 860                 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
 861                         return -EINVAL;
 862
 863                 /* DFS is not supported with multi-channel combinations yet */
 864                 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
 865                         const struct ieee80211_iface_combination *comb;
 866
 867                         comb = &local->hw.wiphy->iface_combinations[i];
 868
 869                         if (comb->radar_detect_widths &&
 870                             comb->num_different_channels > 1)
 871                                 return -EINVAL;
 872                 }
 873         }
 874
 875         /* Only HW csum features are currently compatible with mac80211 */
 876         feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
 877                             NETIF_F_HW_CSUM | NETIF_F_SG | NETIF_F_HIGHDMA |
 878                             NETIF_F_GSO_SOFTWARE | NETIF_F_RXCSUM;
 879         if (WARN_ON(hw->netdev_features & ~feature_whitelist))
 880                 return -EINVAL;
 881
 882         if (hw->max_report_rates == 0)
 883                 hw->max_report_rates = hw->max_rates;
 884
 885         local->rx_chains = 1;
 886
 887         /*
 888          * generic code guarantees at least one band,
 889          * set this very early because much code assumes
 890          * that hw.conf.channel is assigned
 891          */
 892         channels = 0;
 893         max_bitrates = 0;
 894         supp_ht = false;
 895         supp_vht = false;
 896         for (band = 0; band < NUM_NL80211_BANDS; band++) {
 897                 struct ieee80211_supported_band *sband;
 898
 899                 sband = local->hw.wiphy->bands[band];
 900                 if (!sband)
 901                         continue;
 902
 903                 if (!dflt_chandef.chan) {
 904                         cfg80211_chandef_create(&dflt_chandef,
 905                                                 &sband->channels[0],
 906                                                 NL80211_CHAN_NO_HT);
 907                         /* init channel we're on */
 908                         if (!local->use_chanctx && !local->_oper_chandef.chan) {
 909                                 local->hw.conf.chandef = dflt_chandef;
 910                                 local->_oper_chandef = dflt_chandef;
 911                         }
 912                         local->monitor_chandef = dflt_chandef;
 913                 }
 914
 915                 channels += sband->n_channels;
 916
 917                 if (max_bitrates < sband->n_bitrates)
 918                         max_bitrates = sband->n_bitrates;
 919                 supp_ht = supp_ht || sband->ht_cap.ht_supported;
 920                 supp_vht = supp_vht || sband->vht_cap.vht_supported;
 921
 922                 if (!sband->ht_cap.ht_supported)
 923                         continue;
 924
 925                 /* TODO: consider VHT for RX chains, hopefully it's the same */
 926                 local->rx_chains =
 927                         max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
 928                             local->rx_chains);
 929
 930                 /* no need to mask, SM_PS_DISABLED has all bits set */
 931                 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
 932                                      IEEE80211_HT_CAP_SM_PS_SHIFT;
 933         }
 934
 935         /* if low-level driver supports AP, we also support VLAN.
 936          * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN
 937          * based on their support to transmit SW encrypted packets.
 938          */
 939         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) &&
 940             !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) {
 941                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
 942                 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
 943         }
 944
 945         /* mac80211 always supports monitor */
 946         hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
 947         hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
 948
 949         /* mac80211 doesn't support more than one IBSS interface right now */
 950         for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
 951                 const struct ieee80211_iface_combination *c;
 952                 int j;
 953
 954                 c = &hw->wiphy->iface_combinations[i];
 955
 956                 for (j = 0; j < c->n_limits; j++)
 957                         if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
 958                             c->limits[j].max > 1)
 959                                 return -EINVAL;
 960         }
 961
 962         local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
 963                                       sizeof(void *) * channels, GFP_KERNEL);
 964         if (!local->int_scan_req)
 965                 return -ENOMEM;
 966
 967         for (band = 0; band < NUM_NL80211_BANDS; band++) {
 968                 if (!local->hw.wiphy->bands[band])
 969                         continue;
 970                 local->int_scan_req->rates[band] = (u32) -1;
 971         }
 972
 973 #ifndef CONFIG_MAC80211_MESH
 974         /* mesh depends on Kconfig, but drivers should set it if they want */
 975         local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
 976 #endif
 977
 978         /* if the underlying driver supports mesh, mac80211 will (at least)
 979          * provide routing of mesh authentication frames to userspace */
 980         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
 981                 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
 982
 983         /* mac80211 supports control port protocol changing */
 984         local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
 985
 986         if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) {
 987                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
 988         } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) {
 989                 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
 990                 if (hw->max_signal <= 0) {
 991                         result = -EINVAL;
 992                         goto fail_wiphy_register;
 993                 }
 994         }
 995
 996         /*
 997          * Calculate scan IE length -- we need this to alloc
 998          * memory and to subtract from the driver limit. It
 999          * includes the DS Params, (extended) supported rates, and HT
1000          * information -- SSID is the driver's responsibility.
1001          */
1002         local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
1003                 3 /* DS Params */;
1004         if (supp_ht)
1005                 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
1006
1007         if (supp_vht)
1008                 local->scan_ies_len +=
1009                         2 + sizeof(struct ieee80211_vht_cap);
1010
1011         if (!local->ops->hw_scan) {
1012                 /* For hw_scan, driver needs to set these up. */
1013                 local->hw.wiphy->max_scan_ssids = 4;
1014                 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
1015         }
1016
1017         /*
1018          * If the driver supports any scan IEs, then assume the
1019          * limit includes the IEs mac80211 will add, otherwise
1020          * leave it at zero and let the driver sort it out; we
1021          * still pass our IEs to the driver but userspace will
1022          * not be allowed to in that case.
1023          */
1024         if (local->hw.wiphy->max_scan_ie_len)
1025                 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
1026
1027         WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes,
1028                                          local->hw.n_cipher_schemes));
1029
1030         result = ieee80211_init_cipher_suites(local);
1031         if (result < 0)
1032                 goto fail_wiphy_register;
1033
1034         if (!local->ops->remain_on_channel)
1035                 local->hw.wiphy->max_remain_on_channel_duration = 5000;
1036
1037         /* mac80211 based drivers don't support internal TDLS setup */
1038         if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
1039                 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
1040
1041         /* mac80211 supports eCSA, if the driver supports STA CSA at all */
1042         if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA))
1043                 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
1044
1045         local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM;
1046
1047         result = wiphy_register(local->hw.wiphy);
1048         if (result < 0)
1049                 goto fail_wiphy_register;
1050
1051         /*
1052          * We use the number of queues for feature tests (QoS, HT) internally
1053          * so restrict them appropriately.
1054          */
1055         if (hw->queues > IEEE80211_MAX_QUEUES)
1056                 hw->queues = IEEE80211_MAX_QUEUES;
1057
1058         local->workqueue =
1059                 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1060         if (!local->workqueue) {
1061                 result = -ENOMEM;
1062                 goto fail_workqueue;
1063         }
1064
1065         /*
1066          * The hardware needs headroom for sending the frame,
1067          * and we need some headroom for passing the frame to monitor
1068          * interfaces, but never both at the same time.
1069          */
1070         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1071                                    IEEE80211_TX_STATUS_HEADROOM);
1072
1073         debugfs_hw_add(local);
1074
1075         /*
1076          * if the driver doesn't specify a max listen interval we
1077          * use 5 which should be a safe default
1078          */
1079         if (local->hw.max_listen_interval == 0)
1080                 local->hw.max_listen_interval = 5;
1081
1082         local->hw.conf.listen_interval = local->hw.max_listen_interval;
1083
1084         local->dynamic_ps_forced_timeout = -1;
1085
1086         if (!local->hw.max_nan_de_entries)
1087                 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID;
1088
1089         result = ieee80211_wep_init(local);
1090         if (result < 0)
1091                 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
1092                             result);
1093
1094         local->hw.conf.flags = IEEE80211_CONF_IDLE;
1095
1096         ieee80211_led_init(local);
1097
1098         rtnl_lock();
1099
1100         result = ieee80211_init_rate_ctrl_alg(local,
1101                                               hw->rate_control_algorithm);
1102         if (result < 0) {
1103                 wiphy_debug(local->hw.wiphy,
1104                             "Failed to initialize rate control algorithm\n");
1105                 goto fail_rate;
1106         }
1107
1108         /* add one default STA interface if supported */
1109         if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1110             !ieee80211_hw_check(hw, NO_AUTO_VIF)) {
1111                 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1112                                           NL80211_IFTYPE_STATION, NULL);
1113                 if (result)
1114                         wiphy_warn(local->hw.wiphy,
1115                                    "Failed to add default virtual iface\n");
1116         }
1117
1118         rtnl_unlock();
1119
1120         result = ieee80211_txq_setup_flows(local);
1121         if (result)
1122                 goto fail_flows;
1123
1124 #ifdef CONFIG_INET
1125         local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1126         result = register_inetaddr_notifier(&local->ifa_notifier);
1127         if (result)
1128                 goto fail_ifa;
1129 #endif
1130
1131 #if IS_ENABLED(CONFIG_IPV6)
1132         local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1133         result = register_inet6addr_notifier(&local->ifa6_notifier);
1134         if (result)
1135                 goto fail_ifa6;
1136 #endif
1137
1138         return 0;
1139
1140 #if IS_ENABLED(CONFIG_IPV6)
1141  fail_ifa6:
1142 #ifdef CONFIG_INET
1143         unregister_inetaddr_notifier(&local->ifa_notifier);
1144 #endif
1145 #endif
1146 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1147  fail_ifa:
1148 #endif
1149         ieee80211_txq_teardown_flows(local);
1150  fail_flows:
1151         rtnl_lock();
1152         rate_control_deinitialize(local);
1153         ieee80211_remove_interfaces(local);
1154  fail_rate:
1155         rtnl_unlock();
1156         ieee80211_led_exit(local);
1157         ieee80211_wep_free(local);
1158         destroy_workqueue(local->workqueue);
1159  fail_workqueue:
1160         wiphy_unregister(local->hw.wiphy);
1161  fail_wiphy_register:
1162         if (local->wiphy_ciphers_allocated)
1163                 kfree(local->hw.wiphy->cipher_suites);
1164         kfree(local->int_scan_req);
1165         return result;
1166 }
1167 EXPORT_SYMBOL(ieee80211_register_hw);
1168
1169 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1170 {
1171         struct ieee80211_local *local = hw_to_local(hw);
1172
1173         tasklet_kill(&local->tx_pending_tasklet);
1174         tasklet_kill(&local->tasklet);
1175
1176 #ifdef CONFIG_INET
1177         unregister_inetaddr_notifier(&local->ifa_notifier);
1178 #endif
1179 #if IS_ENABLED(CONFIG_IPV6)
1180         unregister_inet6addr_notifier(&local->ifa6_notifier);
1181 #endif
1182
1183         rtnl_lock();
1184
1185         /*
1186          * At this point, interface list manipulations are fine
1187          * because the driver cannot be handing us frames any
1188          * more and the tasklet is killed.
1189          */
1190         ieee80211_remove_interfaces(local);
1191
1192         rtnl_unlock();
1193
1194         cancel_delayed_work_sync(&local->roc_work);
1195         cancel_work_sync(&local->restart_work);
1196         cancel_work_sync(&local->reconfig_filter);
1197         cancel_work_sync(&local->tdls_chsw_work);
1198         flush_work(&local->sched_scan_stopped_work);
1199         flush_work(&local->radar_detected_work);
1200
1201         ieee80211_clear_tx_pending(local);
1202         rate_control_deinitialize(local);
1203
1204         if (skb_queue_len(&local->skb_queue) ||
1205             skb_queue_len(&local->skb_queue_unreliable))
1206                 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1207         skb_queue_purge(&local->skb_queue);
1208         skb_queue_purge(&local->skb_queue_unreliable);
1209         skb_queue_purge(&local->skb_queue_tdls_chsw);
1210         ieee80211_txq_teardown_flows(local);
1211
1212         destroy_workqueue(local->workqueue);
1213         wiphy_unregister(local->hw.wiphy);
1214         ieee80211_wep_free(local);
1215         ieee80211_led_exit(local);
1216         kfree(local->int_scan_req);
1217 }
1218 EXPORT_SYMBOL(ieee80211_unregister_hw);
1219
1220 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1221 {
1222         WARN_ONCE(1, "Have pending ack frames!\n");
1223         kfree_skb(p);
1224         return 0;
1225 }
1226
1227 void ieee80211_free_hw(struct ieee80211_hw *hw)
1228 {
1229         struct ieee80211_local *local = hw_to_local(hw);
1230
1231         mutex_destroy(&local->iflist_mtx);
1232         mutex_destroy(&local->mtx);
1233
1234         if (local->wiphy_ciphers_allocated)
1235                 kfree(local->hw.wiphy->cipher_suites);
1236
1237         idr_for_each(&local->ack_status_frames,
1238                      ieee80211_free_ack_frame, NULL);
1239         idr_destroy(&local->ack_status_frames);
1240
1241         sta_info_stop(local);
1242
1243         ieee80211_free_led_names(local);
1244
1245         wiphy_free(local->hw.wiphy);
1246 }
1247 EXPORT_SYMBOL(ieee80211_free_hw);
1248
1249 static int __init ieee80211_init(void)
1250 {
1251         struct sk_buff *skb;
1252         int ret;
1253
1254         BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1255         BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1256                      IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1257
1258         ret = rc80211_minstrel_init();
1259         if (ret)
1260                 return ret;
1261
1262         ret = rc80211_minstrel_ht_init();
1263         if (ret)
1264                 goto err_minstrel;
1265
1266         ret = ieee80211_iface_init();
1267         if (ret)
1268                 goto err_netdev;
1269
1270         return 0;
1271  err_netdev:
1272         rc80211_minstrel_ht_exit();
1273  err_minstrel:
1274         rc80211_minstrel_exit();
1275
1276         return ret;
1277 }
1278
1279 static void __exit ieee80211_exit(void)
1280 {
1281         rc80211_minstrel_ht_exit();
1282         rc80211_minstrel_exit();
1283
1284         ieee80211s_stop();
1285
1286         ieee80211_iface_exit();
1287
1288         rcu_barrier();
1289 }
1290
1291
1292 subsys_initcall(ieee80211_init);
1293 module_exit(ieee80211_exit);
1294
1295 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1296 MODULE_LICENSE("GPL");