git.oblomov.eu Git - linux-2.6/blob - net/mac80211/main.c

   1 /*
   2  * Copyright 2002-2005, Instant802 Networks, Inc.
   3  * Copyright 2005-2006, Devicescape Software, Inc.
   4  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 #include <net/mac80211.h>
  12 #include <net/ieee80211_radiotap.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/wireless.h>
  22 #include <linux/rtnetlink.h>
  23 #include <linux/bitmap.h>
  24 #include <net/net_namespace.h>
  25 #include <net/cfg80211.h>
  26
  27 #include "ieee80211_i.h"
  28 #include "rate.h"
  29 #include "mesh.h"
  30 #include "wep.h"
  31 #include "wme.h"
  32 #include "aes_ccm.h"
  33 #include "led.h"
  34 #include "cfg.h"
  35 #include "debugfs.h"
  36 #include "debugfs_netdev.h"
  37
  38 #define SUPP_MCS_SET_LEN 16
  39
  40 /*
  41  * For seeing transmitted packets on monitor interfaces
  42  * we have a radiotap header too.
  43  */
  44 struct ieee80211_tx_status_rtap_hdr {
  45         struct ieee80211_radiotap_header hdr;
  46         __le16 tx_flags;
  47         u8 data_retries;
  48 } __attribute__ ((packed));
  49
  50 /* common interface routines */
  51
  52 static int header_parse_80211(const struct sk_buff *skb, unsigned char *haddr)
  53 {
  54         memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
  55         return ETH_ALEN;
  56 }
  57
  58 /* must be called under mdev tx lock */
  59 static void ieee80211_configure_filter(struct ieee80211_local *local)
  60 {
  61         unsigned int changed_flags;
  62         unsigned int new_flags = 0;
  63
  64         if (atomic_read(&local->iff_promiscs))
  65                 new_flags |= FIF_PROMISC_IN_BSS;
  66
  67         if (atomic_read(&local->iff_allmultis))
  68                 new_flags |= FIF_ALLMULTI;
  69
  70         if (local->monitors)
  71                 new_flags |= FIF_BCN_PRBRESP_PROMISC;
  72
  73         if (local->fif_fcsfail)
  74                 new_flags |= FIF_FCSFAIL;
  75
  76         if (local->fif_plcpfail)
  77                 new_flags |= FIF_PLCPFAIL;
  78
  79         if (local->fif_control)
  80                 new_flags |= FIF_CONTROL;
  81
  82         if (local->fif_other_bss)
  83                 new_flags |= FIF_OTHER_BSS;
  84
  85         changed_flags = local->filter_flags ^ new_flags;
  86
  87         /* be a bit nasty */
  88         new_flags |= (1<<31);
  89
  90         local->ops->configure_filter(local_to_hw(local),
  91                                      changed_flags, &new_flags,
  92                                      local->mdev->mc_count,
  93                                      local->mdev->mc_list);
  94
  95         WARN_ON(new_flags & (1<<31));
  96
  97         local->filter_flags = new_flags & ~(1<<31);
  98 }
  99
 100 /* master interface */
 101
 102 static int ieee80211_master_open(struct net_device *dev)
 103 {
 104         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 105         struct ieee80211_sub_if_data *sdata;
 106         int res = -EOPNOTSUPP;
 107
 108         /* we hold the RTNL here so can safely walk the list */
 109         list_for_each_entry(sdata, &local->interfaces, list) {
 110                 if (sdata->dev != dev && netif_running(sdata->dev)) {
 111                         res = 0;
 112                         break;
 113                 }
 114         }
 115         return res;
 116 }
 117
 118 static int ieee80211_master_stop(struct net_device *dev)
 119 {
 120         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 121         struct ieee80211_sub_if_data *sdata;
 122
 123         /* we hold the RTNL here so can safely walk the list */
 124         list_for_each_entry(sdata, &local->interfaces, list)
 125                 if (sdata->dev != dev && netif_running(sdata->dev))
 126                         dev_close(sdata->dev);
 127
 128         return 0;
 129 }
 130
 131 static void ieee80211_master_set_multicast_list(struct net_device *dev)
 132 {
 133         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 134
 135         ieee80211_configure_filter(local);
 136 }
 137
 138 /* regular interfaces */
 139
 140 static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
 141 {
 142         int meshhdrlen;
 143         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 144
 145         meshhdrlen = (sdata->vif.type == IEEE80211_IF_TYPE_MESH_POINT) ? 5 : 0;
 146
 147         /* FIX: what would be proper limits for MTU?
 148          * This interface uses 802.3 frames. */
 149         if (new_mtu < 256 ||
 150                 new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6 - meshhdrlen) {
 151                 printk(KERN_WARNING "%s: invalid MTU %d\n",
 152                        dev->name, new_mtu);
 153                 return -EINVAL;
 154         }
 155
 156 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 157         printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
 158 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
 159         dev->mtu = new_mtu;
 160         return 0;
 161 }
 162
 163 static inline int identical_mac_addr_allowed(int type1, int type2)
 164 {
 165         return (type1 == IEEE80211_IF_TYPE_MNTR ||
 166                 type2 == IEEE80211_IF_TYPE_MNTR ||
 167                 (type1 == IEEE80211_IF_TYPE_AP &&
 168                  type2 == IEEE80211_IF_TYPE_WDS) ||
 169                 (type1 == IEEE80211_IF_TYPE_WDS &&
 170                  (type2 == IEEE80211_IF_TYPE_WDS ||
 171                   type2 == IEEE80211_IF_TYPE_AP)) ||
 172                 (type1 == IEEE80211_IF_TYPE_AP &&
 173                  type2 == IEEE80211_IF_TYPE_VLAN) ||
 174                 (type1 == IEEE80211_IF_TYPE_VLAN &&
 175                  (type2 == IEEE80211_IF_TYPE_AP ||
 176                   type2 == IEEE80211_IF_TYPE_VLAN)));
 177 }
 178
 179 static int ieee80211_open(struct net_device *dev)
 180 {
 181         struct ieee80211_sub_if_data *sdata, *nsdata;
 182         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 183         struct ieee80211_if_init_conf conf;
 184         int res;
 185         bool need_hw_reconfig = 0;
 186         struct sta_info *sta;
 187
 188         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 189
 190         /* we hold the RTNL here so can safely walk the list */
 191         list_for_each_entry(nsdata, &local->interfaces, list) {
 192                 struct net_device *ndev = nsdata->dev;
 193
 194                 if (ndev != dev && ndev != local->mdev && netif_running(ndev)) {
 195                         /*
 196                          * Allow only a single IBSS interface to be up at any
 197                          * time. This is restricted because beacon distribution
 198                          * cannot work properly if both are in the same IBSS.
 199                          *
 200                          * To remove this restriction we'd have to disallow them
 201                          * from setting the same SSID on different IBSS interfaces
 202                          * belonging to the same hardware. Then, however, we're
 203                          * faced with having to adopt two different TSF timers...
 204                          */
 205                         if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
 206                             nsdata->vif.type == IEEE80211_IF_TYPE_IBSS)
 207                                 return -EBUSY;
 208
 209                         /*
 210                          * Disallow multiple IBSS/STA mode interfaces.
 211                          *
 212                          * This is a technical restriction, it is possible although
 213                          * most likely not IEEE 802.11 compliant to have multiple
 214                          * STAs with just a single hardware (the TSF timer will not
 215                          * be adjusted properly.)
 216                          *
 217                          * However, because mac80211 uses the master device's BSS
 218                          * information for each STA/IBSS interface, doing this will
 219                          * currently corrupt that BSS information completely, unless,
 220                          * a not very useful case, both STAs are associated to the
 221                          * same BSS.
 222                          *
 223                          * To remove this restriction, the BSS information needs to
 224                          * be embedded in the STA/IBSS mode sdata instead of using
 225                          * the master device's BSS structure.
 226                          */
 227                         if ((sdata->vif.type == IEEE80211_IF_TYPE_STA ||
 228                              sdata->vif.type == IEEE80211_IF_TYPE_IBSS) &&
 229                             (nsdata->vif.type == IEEE80211_IF_TYPE_STA ||
 230                              nsdata->vif.type == IEEE80211_IF_TYPE_IBSS))
 231                                 return -EBUSY;
 232
 233                         /*
 234                          * The remaining checks are only performed for interfaces
 235                          * with the same MAC address.
 236                          */
 237                         if (compare_ether_addr(dev->dev_addr, ndev->dev_addr))
 238                                 continue;
 239
 240                         /*
 241                          * check whether it may have the same address
 242                          */
 243                         if (!identical_mac_addr_allowed(sdata->vif.type,
 244                                                         nsdata->vif.type))
 245                                 return -ENOTUNIQ;
 246
 247                         /*
 248                          * can only add VLANs to enabled APs
 249                          */
 250                         if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN &&
 251                             nsdata->vif.type == IEEE80211_IF_TYPE_AP)
 252                                 sdata->u.vlan.ap = nsdata;
 253                 }
 254         }
 255
 256         switch (sdata->vif.type) {
 257         case IEEE80211_IF_TYPE_WDS:
 258                 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
 259                         return -ENOLINK;
 260                 break;
 261         case IEEE80211_IF_TYPE_VLAN:
 262                 if (!sdata->u.vlan.ap)
 263                         return -ENOLINK;
 264                 break;
 265         case IEEE80211_IF_TYPE_AP:
 266         case IEEE80211_IF_TYPE_STA:
 267         case IEEE80211_IF_TYPE_MNTR:
 268         case IEEE80211_IF_TYPE_IBSS:
 269         case IEEE80211_IF_TYPE_MESH_POINT:
 270                 /* no special treatment */
 271                 break;
 272         case IEEE80211_IF_TYPE_INVALID:
 273                 /* cannot happen */
 274                 WARN_ON(1);
 275                 break;
 276         }
 277
 278         if (local->open_count == 0) {
 279                 res = 0;
 280                 if (local->ops->start)
 281                         res = local->ops->start(local_to_hw(local));
 282                 if (res)
 283                         return res;
 284                 need_hw_reconfig = 1;
 285                 ieee80211_led_radio(local, local->hw.conf.radio_enabled);
 286         }
 287
 288         switch (sdata->vif.type) {
 289         case IEEE80211_IF_TYPE_VLAN:
 290                 list_add(&sdata->u.vlan.list, &sdata->u.vlan.ap->u.ap.vlans);
 291                 /* no need to tell driver */
 292                 break;
 293         case IEEE80211_IF_TYPE_MNTR:
 294                 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
 295                         local->cooked_mntrs++;
 296                         break;
 297                 }
 298
 299                 /* must be before the call to ieee80211_configure_filter */
 300                 local->monitors++;
 301                 if (local->monitors == 1)
 302                         local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
 303
 304                 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
 305                         local->fif_fcsfail++;
 306                 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
 307                         local->fif_plcpfail++;
 308                 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL)
 309                         local->fif_control++;
 310                 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
 311                         local->fif_other_bss++;
 312
 313                 netif_tx_lock_bh(local->mdev);
 314                 ieee80211_configure_filter(local);
 315                 netif_tx_unlock_bh(local->mdev);
 316                 break;
 317         case IEEE80211_IF_TYPE_STA:
 318         case IEEE80211_IF_TYPE_IBSS:
 319                 sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET;
 320                 /* fall through */
 321         default:
 322                 conf.vif = &sdata->vif;
 323                 conf.type = sdata->vif.type;
 324                 conf.mac_addr = dev->dev_addr;
 325                 res = local->ops->add_interface(local_to_hw(local), &conf);
 326                 if (res)
 327                         goto err_stop;
 328
 329                 ieee80211_if_config(dev);
 330                 ieee80211_reset_erp_info(dev);
 331                 ieee80211_enable_keys(sdata);
 332
 333                 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
 334                     !(sdata->flags & IEEE80211_SDATA_USERSPACE_MLME))
 335                         netif_carrier_off(dev);
 336                 else
 337                         netif_carrier_on(dev);
 338         }
 339
 340         if (sdata->vif.type == IEEE80211_IF_TYPE_WDS) {
 341                 /* Create STA entry for the WDS peer */
 342                 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
 343                                      GFP_KERNEL);
 344                 if (!sta) {
 345                         res = -ENOMEM;
 346                         goto err_del_interface;
 347                 }
 348
 349                 sta->flags |= WLAN_STA_AUTHORIZED;
 350
 351                 res = sta_info_insert(sta);
 352                 if (res) {
 353                         /* STA has been freed */
 354                         goto err_del_interface;
 355                 }
 356         }
 357
 358         if (local->open_count == 0) {
 359                 res = dev_open(local->mdev);
 360                 WARN_ON(res);
 361                 if (res)
 362                         goto err_del_interface;
 363                 tasklet_enable(&local->tx_pending_tasklet);
 364                 tasklet_enable(&local->tasklet);
 365         }
 366
 367         /*
 368          * set_multicast_list will be invoked by the networking core
 369          * which will check whether any increments here were done in
 370          * error and sync them down to the hardware as filter flags.
 371          */
 372         if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
 373                 atomic_inc(&local->iff_allmultis);
 374
 375         if (sdata->flags & IEEE80211_SDATA_PROMISC)
 376                 atomic_inc(&local->iff_promiscs);
 377
 378         local->open_count++;
 379         if (need_hw_reconfig)
 380                 ieee80211_hw_config(local);
 381
 382         /*
 383          * ieee80211_sta_work is disabled while network interface
 384          * is down. Therefore, some configuration changes may not
 385          * yet be effective. Trigger execution of ieee80211_sta_work
 386          * to fix this.
 387          */
 388         if(sdata->vif.type == IEEE80211_IF_TYPE_STA ||
 389            sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
 390                 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
 391                 queue_work(local->hw.workqueue, &ifsta->work);
 392         }
 393
 394         netif_start_queue(dev);
 395
 396         return 0;
 397  err_del_interface:
 398         local->ops->remove_interface(local_to_hw(local), &conf);
 399  err_stop:
 400         if (!local->open_count && local->ops->stop)
 401                 local->ops->stop(local_to_hw(local));
 402         return res;
 403 }
 404
 405 static int ieee80211_stop(struct net_device *dev)
 406 {
 407         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 408         struct ieee80211_local *local = sdata->local;
 409         struct ieee80211_if_init_conf conf;
 410         struct sta_info *sta;
 411
 412         /*
 413          * Stop TX on this interface first.
 414          */
 415         netif_stop_queue(dev);
 416
 417         /*
 418          * Now delete all active aggregation sessions.
 419          */
 420         rcu_read_lock();
 421
 422         list_for_each_entry_rcu(sta, &local->sta_list, list) {
 423                 if (sta->sdata == sdata)
 424                         ieee80211_sta_tear_down_BA_sessions(dev, sta->addr);
 425         }
 426
 427         rcu_read_unlock();
 428
 429         /*
 430          * Remove all stations associated with this interface.
 431          *
 432          * This must be done before calling ops->remove_interface()
 433          * because otherwise we can later invoke ops->sta_notify()
 434          * whenever the STAs are removed, and that invalidates driver
 435          * assumptions about always getting a vif pointer that is valid
 436          * (because if we remove a STA after ops->remove_interface()
 437          * the driver will have removed the vif info already!)
 438          *
 439          * We could relax this and only unlink the stations from the
 440          * hash table and list but keep them on a per-sdata list that
 441          * will be inserted back again when the interface is brought
 442          * up again, but I don't currently see a use case for that,
 443          * except with WDS which gets a STA entry created when it is
 444          * brought up.
 445          */
 446         sta_info_flush(local, sdata);
 447
 448         /*
 449          * Don't count this interface for promisc/allmulti while it
 450          * is down. dev_mc_unsync() will invoke set_multicast_list
 451          * on the master interface which will sync these down to the
 452          * hardware as filter flags.
 453          */
 454         if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
 455                 atomic_dec(&local->iff_allmultis);
 456
 457         if (sdata->flags & IEEE80211_SDATA_PROMISC)
 458                 atomic_dec(&local->iff_promiscs);
 459
 460         dev_mc_unsync(local->mdev, dev);
 461
 462         /* APs need special treatment */
 463         if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
 464                 struct ieee80211_sub_if_data *vlan, *tmp;
 465                 struct beacon_data *old_beacon = sdata->u.ap.beacon;
 466
 467                 /* remove beacon */
 468                 rcu_assign_pointer(sdata->u.ap.beacon, NULL);
 469                 synchronize_rcu();
 470                 kfree(old_beacon);
 471
 472                 /* down all dependent devices, that is VLANs */
 473                 list_for_each_entry_safe(vlan, tmp, &sdata->u.ap.vlans,
 474                                          u.vlan.list)
 475                         dev_close(vlan->dev);
 476                 WARN_ON(!list_empty(&sdata->u.ap.vlans));
 477         }
 478
 479         local->open_count--;
 480
 481         switch (sdata->vif.type) {
 482         case IEEE80211_IF_TYPE_VLAN:
 483                 list_del(&sdata->u.vlan.list);
 484                 sdata->u.vlan.ap = NULL;
 485                 /* no need to tell driver */
 486                 break;
 487         case IEEE80211_IF_TYPE_MNTR:
 488                 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
 489                         local->cooked_mntrs--;
 490                         break;
 491                 }
 492
 493                 local->monitors--;
 494                 if (local->monitors == 0)
 495                         local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
 496
 497                 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
 498                         local->fif_fcsfail--;
 499                 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
 500                         local->fif_plcpfail--;
 501                 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL)
 502                         local->fif_control--;
 503                 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
 504                         local->fif_other_bss--;
 505
 506                 netif_tx_lock_bh(local->mdev);
 507                 ieee80211_configure_filter(local);
 508                 netif_tx_unlock_bh(local->mdev);
 509                 break;
 510         case IEEE80211_IF_TYPE_MESH_POINT:
 511         case IEEE80211_IF_TYPE_STA:
 512         case IEEE80211_IF_TYPE_IBSS:
 513                 sdata->u.sta.state = IEEE80211_DISABLED;
 514                 memset(sdata->u.sta.bssid, 0, ETH_ALEN);
 515                 del_timer_sync(&sdata->u.sta.timer);
 516                 /*
 517                  * When we get here, the interface is marked down.
 518                  * Call synchronize_rcu() to wait for the RX path
 519                  * should it be using the interface and enqueuing
 520                  * frames at this very time on another CPU.
 521                  */
 522                 synchronize_rcu();
 523                 skb_queue_purge(&sdata->u.sta.skb_queue);
 524
 525                 if (local->scan_dev == sdata->dev) {
 526                         if (!local->ops->hw_scan) {
 527                                 local->sta_sw_scanning = 0;
 528                                 cancel_delayed_work(&local->scan_work);
 529                         } else
 530                                 local->sta_hw_scanning = 0;
 531                 }
 532
 533                 flush_workqueue(local->hw.workqueue);
 534
 535                 sdata->u.sta.flags &= ~IEEE80211_STA_PRIVACY_INVOKED;
 536                 kfree(sdata->u.sta.extra_ie);
 537                 sdata->u.sta.extra_ie = NULL;
 538                 sdata->u.sta.extra_ie_len = 0;
 539                 /* fall through */
 540         default:
 541                 conf.vif = &sdata->vif;
 542                 conf.type = sdata->vif.type;
 543                 conf.mac_addr = dev->dev_addr;
 544                 /* disable all keys for as long as this netdev is down */
 545                 ieee80211_disable_keys(sdata);
 546                 local->ops->remove_interface(local_to_hw(local), &conf);
 547         }
 548
 549         if (local->open_count == 0) {
 550                 if (netif_running(local->mdev))
 551                         dev_close(local->mdev);
 552
 553                 if (local->ops->stop)
 554                         local->ops->stop(local_to_hw(local));
 555
 556                 ieee80211_led_radio(local, 0);
 557
 558                 tasklet_disable(&local->tx_pending_tasklet);
 559                 tasklet_disable(&local->tasklet);
 560         }
 561
 562         return 0;
 563 }
 564
 565 int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid)
 566 {
 567         struct ieee80211_local *local = hw_to_local(hw);
 568         struct sta_info *sta;
 569         struct ieee80211_sub_if_data *sdata;
 570         u16 start_seq_num = 0;
 571         u8 *state;
 572         int ret;
 573         DECLARE_MAC_BUF(mac);
 574
 575         if (tid >= STA_TID_NUM)
 576                 return -EINVAL;
 577
 578 #ifdef CONFIG_MAC80211_HT_DEBUG
 579         printk(KERN_DEBUG "Open BA session requested for %s tid %u\n",
 580                                 print_mac(mac, ra), tid);
 581 #endif /* CONFIG_MAC80211_HT_DEBUG */
 582
 583         rcu_read_lock();
 584
 585         sta = sta_info_get(local, ra);
 586         if (!sta) {
 587                 printk(KERN_DEBUG "Could not find the station\n");
 588                 rcu_read_unlock();
 589                 return -ENOENT;
 590         }
 591
 592         spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
 593
 594         /* we have tried too many times, receiver does not want A-MPDU */
 595         if (sta->ampdu_mlme.addba_req_num[tid] > HT_AGG_MAX_RETRIES) {
 596                 ret = -EBUSY;
 597                 goto start_ba_exit;
 598         }
 599
 600         state = &sta->ampdu_mlme.tid_state_tx[tid];
 601         /* check if the TID is not in aggregation flow already */
 602         if (*state != HT_AGG_STATE_IDLE) {
 603 #ifdef CONFIG_MAC80211_HT_DEBUG
 604                 printk(KERN_DEBUG "BA request denied - session is not "
 605                                  "idle on tid %u\n", tid);
 606 #endif /* CONFIG_MAC80211_HT_DEBUG */
 607                 ret = -EAGAIN;
 608                 goto start_ba_exit;
 609         }
 610
 611         /* prepare A-MPDU MLME for Tx aggregation */
 612         sta->ampdu_mlme.tid_tx[tid] =
 613                         kmalloc(sizeof(struct tid_ampdu_tx), GFP_ATOMIC);
 614         if (!sta->ampdu_mlme.tid_tx[tid]) {
 615                 if (net_ratelimit())
 616                         printk(KERN_ERR "allocate tx mlme to tid %d failed\n",
 617                                         tid);
 618                 ret = -ENOMEM;
 619                 goto start_ba_exit;
 620         }
 621         /* Tx timer */
 622         sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.function =
 623                         sta_addba_resp_timer_expired;
 624         sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.data =
 625                         (unsigned long)&sta->timer_to_tid[tid];
 626         init_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
 627
 628         /* ensure that TX flow won't interrupt us
 629          * until the end of the call to requeue function */
 630         spin_lock_bh(&local->mdev->queue_lock);
 631
 632         /* create a new queue for this aggregation */
 633         ret = ieee80211_ht_agg_queue_add(local, sta, tid);
 634
 635         /* case no queue is available to aggregation
 636          * don't switch to aggregation */
 637         if (ret) {
 638 #ifdef CONFIG_MAC80211_HT_DEBUG
 639                 printk(KERN_DEBUG "BA request denied - queue unavailable for"
 640                                         " tid %d\n", tid);
 641 #endif /* CONFIG_MAC80211_HT_DEBUG */
 642                 goto start_ba_err;
 643         }
 644         sdata = sta->sdata;
 645
 646         /* Ok, the Addba frame hasn't been sent yet, but if the driver calls the
 647          * call back right away, it must see that the flow has begun */
 648         *state |= HT_ADDBA_REQUESTED_MSK;
 649
 650         if (local->ops->ampdu_action)
 651                 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_START,
 652                                                 ra, tid, &start_seq_num);
 653
 654         if (ret) {
 655                 /* No need to requeue the packets in the agg queue, since we
 656                  * held the tx lock: no packet could be enqueued to the newly
 657                  * allocated queue */
 658                  ieee80211_ht_agg_queue_remove(local, sta, tid, 0);
 659 #ifdef CONFIG_MAC80211_HT_DEBUG
 660                 printk(KERN_DEBUG "BA request denied - HW unavailable for"
 661                                         " tid %d\n", tid);
 662 #endif /* CONFIG_MAC80211_HT_DEBUG */
 663                 *state = HT_AGG_STATE_IDLE;
 664                 goto start_ba_err;
 665         }
 666
 667         /* Will put all the packets in the new SW queue */
 668         ieee80211_requeue(local, ieee802_1d_to_ac[tid]);
 669         spin_unlock_bh(&local->mdev->queue_lock);
 670
 671         /* send an addBA request */
 672         sta->ampdu_mlme.dialog_token_allocator++;
 673         sta->ampdu_mlme.tid_tx[tid]->dialog_token =
 674                         sta->ampdu_mlme.dialog_token_allocator;
 675         sta->ampdu_mlme.tid_tx[tid]->ssn = start_seq_num;
 676
 677         ieee80211_send_addba_request(sta->sdata->dev, ra, tid,
 678                          sta->ampdu_mlme.tid_tx[tid]->dialog_token,
 679                          sta->ampdu_mlme.tid_tx[tid]->ssn,
 680                          0x40, 5000);
 681
 682         /* activate the timer for the recipient's addBA response */
 683         sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.expires =
 684                                 jiffies + ADDBA_RESP_INTERVAL;
 685         add_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
 686         printk(KERN_DEBUG "activated addBA response timer on tid %d\n", tid);
 687         goto start_ba_exit;
 688
 689 start_ba_err:
 690         kfree(sta->ampdu_mlme.tid_tx[tid]);
 691         sta->ampdu_mlme.tid_tx[tid] = NULL;
 692         spin_unlock_bh(&local->mdev->queue_lock);
 693         ret = -EBUSY;
 694 start_ba_exit:
 695         spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
 696         rcu_read_unlock();
 697         return ret;
 698 }
 699 EXPORT_SYMBOL(ieee80211_start_tx_ba_session);
 700
 701 int ieee80211_stop_tx_ba_session(struct ieee80211_hw *hw,
 702                                  u8 *ra, u16 tid,
 703                                  enum ieee80211_back_parties initiator)
 704 {
 705         struct ieee80211_local *local = hw_to_local(hw);
 706         struct sta_info *sta;
 707         u8 *state;
 708         int ret = 0;
 709         DECLARE_MAC_BUF(mac);
 710
 711         if (tid >= STA_TID_NUM)
 712                 return -EINVAL;
 713
 714         rcu_read_lock();
 715         sta = sta_info_get(local, ra);
 716         if (!sta) {
 717                 rcu_read_unlock();
 718                 return -ENOENT;
 719         }
 720
 721         /* check if the TID is in aggregation */
 722         state = &sta->ampdu_mlme.tid_state_tx[tid];
 723         spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
 724
 725         if (*state != HT_AGG_STATE_OPERATIONAL) {
 726                 ret = -ENOENT;
 727                 goto stop_BA_exit;
 728         }
 729
 730 #ifdef CONFIG_MAC80211_HT_DEBUG
 731         printk(KERN_DEBUG "Tx BA session stop requested for %s tid %u\n",
 732                                 print_mac(mac, ra), tid);
 733 #endif /* CONFIG_MAC80211_HT_DEBUG */
 734
 735         ieee80211_stop_queue(hw, sta->tid_to_tx_q[tid]);
 736
 737         *state = HT_AGG_STATE_REQ_STOP_BA_MSK |
 738                 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
 739
 740         if (local->ops->ampdu_action)
 741                 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_STOP,
 742                                                 ra, tid, NULL);
 743
 744         /* case HW denied going back to legacy */
 745         if (ret) {
 746                 WARN_ON(ret != -EBUSY);
 747                 *state = HT_AGG_STATE_OPERATIONAL;
 748                 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
 749                 goto stop_BA_exit;
 750         }
 751
 752 stop_BA_exit:
 753         spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
 754         rcu_read_unlock();
 755         return ret;
 756 }
 757 EXPORT_SYMBOL(ieee80211_stop_tx_ba_session);
 758
 759 void ieee80211_start_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u16 tid)
 760 {
 761         struct ieee80211_local *local = hw_to_local(hw);
 762         struct sta_info *sta;
 763         u8 *state;
 764         DECLARE_MAC_BUF(mac);
 765
 766         if (tid >= STA_TID_NUM) {
 767                 printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n",
 768                                 tid, STA_TID_NUM);
 769                 return;
 770         }
 771
 772         rcu_read_lock();
 773         sta = sta_info_get(local, ra);
 774         if (!sta) {
 775                 rcu_read_unlock();
 776                 printk(KERN_DEBUG "Could not find station: %s\n",
 777                                 print_mac(mac, ra));
 778                 return;
 779         }
 780
 781         state = &sta->ampdu_mlme.tid_state_tx[tid];
 782         spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
 783
 784         if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
 785                 printk(KERN_DEBUG "addBA was not requested yet, state is %d\n",
 786                                 *state);
 787                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
 788                 rcu_read_unlock();
 789                 return;
 790         }
 791
 792         WARN_ON_ONCE(*state & HT_ADDBA_DRV_READY_MSK);
 793
 794         *state |= HT_ADDBA_DRV_READY_MSK;
 795
 796         if (*state == HT_AGG_STATE_OPERATIONAL) {
 797                 printk(KERN_DEBUG "Aggregation is on for tid %d \n", tid);
 798                 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
 799         }
 800         spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
 801         rcu_read_unlock();
 802 }
 803 EXPORT_SYMBOL(ieee80211_start_tx_ba_cb);
 804
 805 void ieee80211_stop_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u8 tid)
 806 {
 807         struct ieee80211_local *local = hw_to_local(hw);
 808         struct sta_info *sta;
 809         u8 *state;
 810         int agg_queue;
 811         DECLARE_MAC_BUF(mac);
 812
 813         if (tid >= STA_TID_NUM) {
 814                 printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n",
 815                                 tid, STA_TID_NUM);
 816                 return;
 817         }
 818
 819 #ifdef CONFIG_MAC80211_HT_DEBUG
 820         printk(KERN_DEBUG "Stopping Tx BA session for %s tid %d\n",
 821                                 print_mac(mac, ra), tid);
 822 #endif /* CONFIG_MAC80211_HT_DEBUG */
 823
 824         rcu_read_lock();
 825         sta = sta_info_get(local, ra);
 826         if (!sta) {
 827                 printk(KERN_DEBUG "Could not find station: %s\n",
 828                                 print_mac(mac, ra));
 829                 rcu_read_unlock();
 830                 return;
 831         }
 832         state = &sta->ampdu_mlme.tid_state_tx[tid];
 833
 834         spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
 835         if ((*state & HT_AGG_STATE_REQ_STOP_BA_MSK) == 0) {
 836                 printk(KERN_DEBUG "unexpected callback to A-MPDU stop\n");
 837                 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
 838                 rcu_read_unlock();
 839                 return;
 840         }
 841
 842         if (*state & HT_AGG_STATE_INITIATOR_MSK)
 843                 ieee80211_send_delba(sta->sdata->dev, ra, tid,
 844                         WLAN_BACK_INITIATOR, WLAN_REASON_QSTA_NOT_USE);
 845
 846         agg_queue = sta->tid_to_tx_q[tid];
 847
 848         /* avoid ordering issues: we are the only one that can modify
 849          * the content of the qdiscs */
 850         spin_lock_bh(&local->mdev->queue_lock);
 851         /* remove the queue for this aggregation */
 852         ieee80211_ht_agg_queue_remove(local, sta, tid, 1);
 853         spin_unlock_bh(&local->mdev->queue_lock);
 854
 855         /* we just requeued the all the frames that were in the removed
 856          * queue, and since we might miss a softirq we do netif_schedule.
 857          * ieee80211_wake_queue is not used here as this queue is not
 858          * necessarily stopped */
 859         netif_schedule(local->mdev);
 860         *state = HT_AGG_STATE_IDLE;
 861         sta->ampdu_mlme.addba_req_num[tid] = 0;
 862         kfree(sta->ampdu_mlme.tid_tx[tid]);
 863         sta->ampdu_mlme.tid_tx[tid] = NULL;
 864         spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
 865
 866         rcu_read_unlock();
 867 }
 868 EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb);
 869
 870 void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_hw *hw,
 871                                       const u8 *ra, u16 tid)
 872 {
 873         struct ieee80211_local *local = hw_to_local(hw);
 874         struct ieee80211_ra_tid *ra_tid;
 875         struct sk_buff *skb = dev_alloc_skb(0);
 876
 877         if (unlikely(!skb)) {
 878                 if (net_ratelimit())
 879                         printk(KERN_WARNING "%s: Not enough memory, "
 880                                "dropping start BA session", skb->dev->name);
 881                 return;
 882         }
 883         ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
 884         memcpy(&ra_tid->ra, ra, ETH_ALEN);
 885         ra_tid->tid = tid;
 886
 887         skb->pkt_type = IEEE80211_ADDBA_MSG;
 888         skb_queue_tail(&local->skb_queue, skb);
 889         tasklet_schedule(&local->tasklet);
 890 }
 891 EXPORT_SYMBOL(ieee80211_start_tx_ba_cb_irqsafe);
 892
 893 void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_hw *hw,
 894                                      const u8 *ra, u16 tid)
 895 {
 896         struct ieee80211_local *local = hw_to_local(hw);
 897         struct ieee80211_ra_tid *ra_tid;
 898         struct sk_buff *skb = dev_alloc_skb(0);
 899
 900         if (unlikely(!skb)) {
 901                 if (net_ratelimit())
 902                         printk(KERN_WARNING "%s: Not enough memory, "
 903                                "dropping stop BA session", skb->dev->name);
 904                 return;
 905         }
 906         ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
 907         memcpy(&ra_tid->ra, ra, ETH_ALEN);
 908         ra_tid->tid = tid;
 909
 910         skb->pkt_type = IEEE80211_DELBA_MSG;
 911         skb_queue_tail(&local->skb_queue, skb);
 912         tasklet_schedule(&local->tasklet);
 913 }
 914 EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb_irqsafe);
 915
 916 static void ieee80211_set_multicast_list(struct net_device *dev)
 917 {
 918         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 919         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 920         int allmulti, promisc, sdata_allmulti, sdata_promisc;
 921
 922         allmulti = !!(dev->flags & IFF_ALLMULTI);
 923         promisc = !!(dev->flags & IFF_PROMISC);
 924         sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
 925         sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
 926
 927         if (allmulti != sdata_allmulti) {
 928                 if (dev->flags & IFF_ALLMULTI)
 929                         atomic_inc(&local->iff_allmultis);
 930                 else
 931                         atomic_dec(&local->iff_allmultis);
 932                 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
 933         }
 934
 935         if (promisc != sdata_promisc) {
 936                 if (dev->flags & IFF_PROMISC)
 937                         atomic_inc(&local->iff_promiscs);
 938                 else
 939                         atomic_dec(&local->iff_promiscs);
 940                 sdata->flags ^= IEEE80211_SDATA_PROMISC;
 941         }
 942
 943         dev_mc_sync(local->mdev, dev);
 944 }
 945
 946 static const struct header_ops ieee80211_header_ops = {
 947         .create         = eth_header,
 948         .parse          = header_parse_80211,
 949         .rebuild        = eth_rebuild_header,
 950         .cache          = eth_header_cache,
 951         .cache_update   = eth_header_cache_update,
 952 };
 953
 954 /* Must not be called for mdev */
 955 void ieee80211_if_setup(struct net_device *dev)
 956 {
 957         ether_setup(dev);
 958         dev->hard_start_xmit = ieee80211_subif_start_xmit;
 959         dev->wireless_handlers = &ieee80211_iw_handler_def;
 960         dev->set_multicast_list = ieee80211_set_multicast_list;
 961         dev->change_mtu = ieee80211_change_mtu;
 962         dev->open = ieee80211_open;
 963         dev->stop = ieee80211_stop;
 964         dev->destructor = ieee80211_if_free;
 965 }
 966
 967 /* everything else */
 968
 969 static int __ieee80211_if_config(struct net_device *dev,
 970                                  struct sk_buff *beacon,
 971                                  struct ieee80211_tx_control *control)
 972 {
 973         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 974         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 975         struct ieee80211_if_conf conf;
 976
 977         if (!local->ops->config_interface || !netif_running(dev))
 978                 return 0;
 979
 980         memset(&conf, 0, sizeof(conf));
 981         conf.type = sdata->vif.type;
 982         if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
 983             sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
 984                 conf.bssid = sdata->u.sta.bssid;
 985                 conf.ssid = sdata->u.sta.ssid;
 986                 conf.ssid_len = sdata->u.sta.ssid_len;
 987         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
 988                 conf.beacon = beacon;
 989                 conf.beacon_control = control;
 990                 ieee80211_start_mesh(dev);
 991         } else if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
 992                 conf.ssid = sdata->u.ap.ssid;
 993                 conf.ssid_len = sdata->u.ap.ssid_len;
 994                 conf.beacon = beacon;
 995                 conf.beacon_control = control;
 996         }
 997         return local->ops->config_interface(local_to_hw(local),
 998                                             &sdata->vif, &conf);
 999 }
1000
1001 int ieee80211_if_config(struct net_device *dev)
1002 {
1003         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1004         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1005         if (sdata->vif.type == IEEE80211_IF_TYPE_MESH_POINT &&
1006             (local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
1007                 return ieee80211_if_config_beacon(dev);
1008         return __ieee80211_if_config(dev, NULL, NULL);
1009 }
1010
1011 int ieee80211_if_config_beacon(struct net_device *dev)
1012 {
1013         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1014         struct ieee80211_tx_control control;
1015         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1016         struct sk_buff *skb;
1017
1018         if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
1019                 return 0;
1020         skb = ieee80211_beacon_get(local_to_hw(local), &sdata->vif,
1021                                    &control);
1022         if (!skb)
1023                 return -ENOMEM;
1024         return __ieee80211_if_config(dev, skb, &control);
1025 }
1026
1027 int ieee80211_hw_config(struct ieee80211_local *local)
1028 {
1029         struct ieee80211_channel *chan;
1030         int ret = 0;
1031
1032         if (local->sta_sw_scanning)
1033                 chan = local->scan_channel;
1034         else
1035                 chan = local->oper_channel;
1036
1037         local->hw.conf.channel = chan;
1038
1039         if (!local->hw.conf.power_level)
1040                 local->hw.conf.power_level = chan->max_power;
1041         else
1042                 local->hw.conf.power_level = min(chan->max_power,
1043                                                local->hw.conf.power_level);
1044
1045         local->hw.conf.max_antenna_gain = chan->max_antenna_gain;
1046
1047 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1048         printk(KERN_DEBUG "%s: HW CONFIG: freq=%d\n",
1049                wiphy_name(local->hw.wiphy), chan->center_freq);
1050 #endif
1051
1052         if (local->open_count)
1053                 ret = local->ops->config(local_to_hw(local), &local->hw.conf);
1054
1055         return ret;
1056 }
1057
1058 /**
1059  * ieee80211_handle_ht should be used only after legacy configuration
1060  * has been determined namely band, as ht configuration depends upon
1061  * the hardware's HT abilities for a _specific_ band.
1062  */
1063 u32 ieee80211_handle_ht(struct ieee80211_local *local, int enable_ht,
1064                            struct ieee80211_ht_info *req_ht_cap,
1065                            struct ieee80211_ht_bss_info *req_bss_cap)
1066 {
1067         struct ieee80211_conf *conf = &local->hw.conf;
1068         struct ieee80211_supported_band *sband;
1069         struct ieee80211_ht_info ht_conf;
1070         struct ieee80211_ht_bss_info ht_bss_conf;
1071         int i;
1072         u32 changed = 0;
1073
1074         sband = local->hw.wiphy->bands[conf->channel->band];
1075
1076         /* HT is not supported */
1077         if (!sband->ht_info.ht_supported) {
1078                 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
1079                 return 0;
1080         }
1081
1082         memset(&ht_conf, 0, sizeof(struct ieee80211_ht_info));
1083         memset(&ht_bss_conf, 0, sizeof(struct ieee80211_ht_bss_info));
1084
1085         if (enable_ht) {
1086                 if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE))
1087                         changed |= BSS_CHANGED_HT;
1088
1089                 conf->flags |= IEEE80211_CONF_SUPPORT_HT_MODE;
1090                 ht_conf.ht_supported = 1;
1091
1092                 ht_conf.cap = req_ht_cap->cap & sband->ht_info.cap;
1093                 ht_conf.cap &= ~(IEEE80211_HT_CAP_MIMO_PS);
1094                 ht_conf.cap |= sband->ht_info.cap & IEEE80211_HT_CAP_MIMO_PS;
1095
1096                 for (i = 0; i < SUPP_MCS_SET_LEN; i++)
1097                         ht_conf.supp_mcs_set[i] =
1098                                         sband->ht_info.supp_mcs_set[i] &
1099                                         req_ht_cap->supp_mcs_set[i];
1100
1101                 ht_bss_conf.primary_channel = req_bss_cap->primary_channel;
1102                 ht_bss_conf.bss_cap = req_bss_cap->bss_cap;
1103                 ht_bss_conf.bss_op_mode = req_bss_cap->bss_op_mode;
1104
1105                 ht_conf.ampdu_factor = req_ht_cap->ampdu_factor;
1106                 ht_conf.ampdu_density = req_ht_cap->ampdu_density;
1107
1108                 /* if bss configuration changed store the new one */
1109                 if (memcmp(&conf->ht_conf, &ht_conf, sizeof(ht_conf)) ||
1110                     memcmp(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf))) {
1111                         changed |= BSS_CHANGED_HT;
1112                         memcpy(&conf->ht_conf, &ht_conf, sizeof(ht_conf));
1113                         memcpy(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf));
1114                 }
1115         } else {
1116                 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE)
1117                         changed |= BSS_CHANGED_HT;
1118                 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
1119         }
1120
1121         return changed;
1122 }
1123
1124 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
1125                                       u32 changed)
1126 {
1127         struct ieee80211_local *local = sdata->local;
1128
1129         if (!changed)
1130                 return;
1131
1132         if (local->ops->bss_info_changed)
1133                 local->ops->bss_info_changed(local_to_hw(local),
1134                                              &sdata->vif,
1135                                              &sdata->bss_conf,
1136                                              changed);
1137 }
1138
1139 void ieee80211_reset_erp_info(struct net_device *dev)
1140 {
1141         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1142
1143         sdata->bss_conf.use_cts_prot = 0;
1144         sdata->bss_conf.use_short_preamble = 0;
1145         ieee80211_bss_info_change_notify(sdata,
1146                                          BSS_CHANGED_ERP_CTS_PROT |
1147                                          BSS_CHANGED_ERP_PREAMBLE);
1148 }
1149
1150 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
1151                                  struct sk_buff *skb,
1152                                  struct ieee80211_tx_status *status)
1153 {
1154         struct ieee80211_local *local = hw_to_local(hw);
1155         struct ieee80211_tx_status *saved;
1156         int tmp;
1157
1158         skb->dev = local->mdev;
1159         saved = kmalloc(sizeof(struct ieee80211_tx_status), GFP_ATOMIC);
1160         if (unlikely(!saved)) {
1161                 if (net_ratelimit())
1162                         printk(KERN_WARNING "%s: Not enough memory, "
1163                                "dropping tx status", skb->dev->name);
1164                 /* should be dev_kfree_skb_irq, but due to this function being
1165                  * named _irqsafe instead of just _irq we can't be sure that
1166                  * people won't call it from non-irq contexts */
1167                 dev_kfree_skb_any(skb);
1168                 return;
1169         }
1170         memcpy(saved, status, sizeof(struct ieee80211_tx_status));
1171         /* copy pointer to saved status into skb->cb for use by tasklet */
1172         memcpy(skb->cb, &saved, sizeof(saved));
1173
1174         skb->pkt_type = IEEE80211_TX_STATUS_MSG;
1175         skb_queue_tail(status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS ?
1176                        &local->skb_queue : &local->skb_queue_unreliable, skb);
1177         tmp = skb_queue_len(&local->skb_queue) +
1178                 skb_queue_len(&local->skb_queue_unreliable);
1179         while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
1180                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
1181                 memcpy(&saved, skb->cb, sizeof(saved));
1182                 kfree(saved);
1183                 dev_kfree_skb_irq(skb);
1184                 tmp--;
1185                 I802_DEBUG_INC(local->tx_status_drop);
1186         }
1187         tasklet_schedule(&local->tasklet);
1188 }
1189 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
1190
1191 static void ieee80211_tasklet_handler(unsigned long data)
1192 {
1193         struct ieee80211_local *local = (struct ieee80211_local *) data;
1194         struct sk_buff *skb;
1195         struct ieee80211_rx_status rx_status;
1196         struct ieee80211_tx_status *tx_status;
1197         struct ieee80211_ra_tid *ra_tid;
1198
1199         while ((skb = skb_dequeue(&local->skb_queue)) ||
1200                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
1201                 switch (skb->pkt_type) {
1202                 case IEEE80211_RX_MSG:
1203                         /* status is in skb->cb */
1204                         memcpy(&rx_status, skb->cb, sizeof(rx_status));
1205                         /* Clear skb->pkt_type in order to not confuse kernel
1206                          * netstack. */
1207                         skb->pkt_type = 0;
1208                         __ieee80211_rx(local_to_hw(local), skb, &rx_status);
1209                         break;
1210                 case IEEE80211_TX_STATUS_MSG:
1211                         /* get pointer to saved status out of skb->cb */
1212                         memcpy(&tx_status, skb->cb, sizeof(tx_status));
1213                         skb->pkt_type = 0;
1214                         ieee80211_tx_status(local_to_hw(local),
1215                                             skb, tx_status);
1216                         kfree(tx_status);
1217                         break;
1218                 case IEEE80211_DELBA_MSG:
1219                         ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
1220                         ieee80211_stop_tx_ba_cb(local_to_hw(local),
1221                                                 ra_tid->ra, ra_tid->tid);
1222                         dev_kfree_skb(skb);
1223                         break;
1224                 case IEEE80211_ADDBA_MSG:
1225                         ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
1226                         ieee80211_start_tx_ba_cb(local_to_hw(local),
1227                                                  ra_tid->ra, ra_tid->tid);
1228                         dev_kfree_skb(skb);
1229                         break ;
1230                 default: /* should never get here! */
1231                         printk(KERN_ERR "%s: Unknown message type (%d)\n",
1232                                wiphy_name(local->hw.wiphy), skb->pkt_type);
1233                         dev_kfree_skb(skb);
1234                         break;
1235                 }
1236         }
1237 }
1238
1239 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
1240  * make a prepared TX frame (one that has been given to hw) to look like brand
1241  * new IEEE 802.11 frame that is ready to go through TX processing again.
1242  * Also, tx_packet_data in cb is restored from tx_control. */
1243 static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
1244                                       struct ieee80211_key *key,
1245                                       struct sk_buff *skb,
1246                                       struct ieee80211_tx_control *control)
1247 {
1248         int hdrlen, iv_len, mic_len;
1249         struct ieee80211_tx_packet_data *pkt_data;
1250
1251         pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
1252         pkt_data->ifindex = vif_to_sdata(control->vif)->dev->ifindex;
1253         pkt_data->flags = 0;
1254         if (control->flags & IEEE80211_TXCTL_REQ_TX_STATUS)
1255                 pkt_data->flags |= IEEE80211_TXPD_REQ_TX_STATUS;
1256         if (control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT)
1257                 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
1258         if (control->flags & IEEE80211_TXCTL_REQUEUE)
1259                 pkt_data->flags |= IEEE80211_TXPD_REQUEUE;
1260         if (control->flags & IEEE80211_TXCTL_EAPOL_FRAME)
1261                 pkt_data->flags |= IEEE80211_TXPD_EAPOL_FRAME;
1262         pkt_data->queue = control->queue;
1263
1264         hdrlen = ieee80211_get_hdrlen_from_skb(skb);
1265
1266         if (!key)
1267                 goto no_key;
1268
1269         switch (key->conf.alg) {
1270         case ALG_WEP:
1271                 iv_len = WEP_IV_LEN;
1272                 mic_len = WEP_ICV_LEN;
1273                 break;
1274         case ALG_TKIP:
1275                 iv_len = TKIP_IV_LEN;
1276                 mic_len = TKIP_ICV_LEN;
1277                 break;
1278         case ALG_CCMP:
1279                 iv_len = CCMP_HDR_LEN;
1280                 mic_len = CCMP_MIC_LEN;
1281                 break;
1282         default:
1283                 goto no_key;
1284         }
1285
1286         if (skb->len >= mic_len &&
1287             !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
1288                 skb_trim(skb, skb->len - mic_len);
1289         if (skb->len >= iv_len && skb->len > hdrlen) {
1290                 memmove(skb->data + iv_len, skb->data, hdrlen);
1291                 skb_pull(skb, iv_len);
1292         }
1293
1294 no_key:
1295         {
1296                 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1297                 u16 fc = le16_to_cpu(hdr->frame_control);
1298                 if ((fc & 0x8C) == 0x88) /* QoS Control Field */ {
1299                         fc &= ~IEEE80211_STYPE_QOS_DATA;
1300                         hdr->frame_control = cpu_to_le16(fc);
1301                         memmove(skb->data + 2, skb->data, hdrlen - 2);
1302                         skb_pull(skb, 2);
1303                 }
1304         }
1305 }
1306
1307 static void ieee80211_handle_filtered_frame(struct ieee80211_local *local,
1308                                             struct sta_info *sta,
1309                                             struct sk_buff *skb,
1310                                             struct ieee80211_tx_status *status)
1311 {
1312         sta->tx_filtered_count++;
1313
1314         /*
1315          * Clear the TX filter mask for this STA when sending the next
1316          * packet. If the STA went to power save mode, this will happen
1317          * when it wakes up for the next time.
1318          */
1319         sta->flags |= WLAN_STA_CLEAR_PS_FILT;
1320
1321         /*
1322          * This code races in the following way:
1323          *
1324          *  (1) STA sends frame indicating it will go to sleep and does so
1325          *  (2) hardware/firmware adds STA to filter list, passes frame up
1326          *  (3) hardware/firmware processes TX fifo and suppresses a frame
1327          *  (4) we get TX status before having processed the frame and
1328          *      knowing that the STA has gone to sleep.
1329          *
1330          * This is actually quite unlikely even when both those events are
1331          * processed from interrupts coming in quickly after one another or
1332          * even at the same time because we queue both TX status events and
1333          * RX frames to be processed by a tasklet and process them in the
1334          * same order that they were received or TX status last. Hence, there
1335          * is no race as long as the frame RX is processed before the next TX
1336          * status, which drivers can ensure, see below.
1337          *
1338          * Note that this can only happen if the hardware or firmware can
1339          * actually add STAs to the filter list, if this is done by the
1340          * driver in response to set_tim() (which will only reduce the race
1341          * this whole filtering tries to solve, not completely solve it)
1342          * this situation cannot happen.
1343          *
1344          * To completely solve this race drivers need to make sure that they
1345          *  (a) don't mix the irq-safe/not irq-safe TX status/RX processing
1346          *      functions and
1347          *  (b) always process RX events before TX status events if ordering
1348          *      can be unknown, for example with different interrupt status
1349          *      bits.
1350          */
1351         if (sta->flags & WLAN_STA_PS &&
1352             skb_queue_len(&sta->tx_filtered) < STA_MAX_TX_BUFFER) {
1353                 ieee80211_remove_tx_extra(local, sta->key, skb,
1354                                           &status->control);
1355                 skb_queue_tail(&sta->tx_filtered, skb);
1356                 return;
1357         }
1358
1359         if (!(sta->flags & WLAN_STA_PS) &&
1360             !(status->control.flags & IEEE80211_TXCTL_REQUEUE)) {
1361                 /* Software retry the packet once */
1362                 status->control.flags |= IEEE80211_TXCTL_REQUEUE;
1363                 ieee80211_remove_tx_extra(local, sta->key, skb,
1364                                           &status->control);
1365                 dev_queue_xmit(skb);
1366                 return;
1367         }
1368
1369         if (net_ratelimit())
1370                 printk(KERN_DEBUG "%s: dropped TX filtered frame, "
1371                        "queue_len=%d PS=%d @%lu\n",
1372                        wiphy_name(local->hw.wiphy),
1373                        skb_queue_len(&sta->tx_filtered),
1374                        !!(sta->flags & WLAN_STA_PS), jiffies);
1375         dev_kfree_skb(skb);
1376 }
1377
1378 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
1379                          struct ieee80211_tx_status *status)
1380 {
1381         struct sk_buff *skb2;
1382         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1383         struct ieee80211_local *local = hw_to_local(hw);
1384         u16 frag, type;
1385         struct ieee80211_tx_status_rtap_hdr *rthdr;
1386         struct ieee80211_sub_if_data *sdata;
1387         struct net_device *prev_dev = NULL;
1388
1389         if (!status) {
1390                 printk(KERN_ERR
1391                        "%s: ieee80211_tx_status called with NULL status\n",
1392                        wiphy_name(local->hw.wiphy));
1393                 dev_kfree_skb(skb);
1394                 return;
1395         }
1396
1397         rcu_read_lock();
1398
1399         if (status->excessive_retries) {
1400                 struct sta_info *sta;
1401                 sta = sta_info_get(local, hdr->addr1);
1402                 if (sta) {
1403                         if (sta->flags & WLAN_STA_PS) {
1404                                 /*
1405                                  * The STA is in power save mode, so assume
1406                                  * that this TX packet failed because of that.
1407                                  */
1408                                 status->excessive_retries = 0;
1409                                 status->flags |= IEEE80211_TX_STATUS_TX_FILTERED;
1410                                 ieee80211_handle_filtered_frame(local, sta,
1411                                                                 skb, status);
1412                                 rcu_read_unlock();
1413                                 return;
1414                         }
1415                 }
1416         }
1417
1418         if (status->flags & IEEE80211_TX_STATUS_TX_FILTERED) {
1419                 struct sta_info *sta;
1420                 sta = sta_info_get(local, hdr->addr1);
1421                 if (sta) {
1422                         ieee80211_handle_filtered_frame(local, sta, skb,
1423                                                         status);
1424                         rcu_read_unlock();
1425                         return;
1426                 }
1427         } else
1428                 rate_control_tx_status(local->mdev, skb, status);
1429
1430         rcu_read_unlock();
1431
1432         ieee80211_led_tx(local, 0);
1433
1434         /* SNMP counters
1435          * Fragments are passed to low-level drivers as separate skbs, so these
1436          * are actually fragments, not frames. Update frame counters only for
1437          * the first fragment of the frame. */
1438
1439         frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
1440         type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
1441
1442         if (status->flags & IEEE80211_TX_STATUS_ACK) {
1443                 if (frag == 0) {
1444                         local->dot11TransmittedFrameCount++;
1445                         if (is_multicast_ether_addr(hdr->addr1))
1446                                 local->dot11MulticastTransmittedFrameCount++;
1447                         if (status->retry_count > 0)
1448                                 local->dot11RetryCount++;
1449                         if (status->retry_count > 1)
1450                                 local->dot11MultipleRetryCount++;
1451                 }
1452
1453                 /* This counter shall be incremented for an acknowledged MPDU
1454                  * with an individual address in the address 1 field or an MPDU
1455                  * with a multicast address in the address 1 field of type Data
1456                  * or Management. */
1457                 if (!is_multicast_ether_addr(hdr->addr1) ||
1458                     type == IEEE80211_FTYPE_DATA ||
1459                     type == IEEE80211_FTYPE_MGMT)
1460                         local->dot11TransmittedFragmentCount++;
1461         } else {
1462                 if (frag == 0)
1463                         local->dot11FailedCount++;
1464         }
1465
1466         /* this was a transmitted frame, but now we want to reuse it */
1467         skb_orphan(skb);
1468
1469         /*
1470          * This is a bit racy but we can avoid a lot of work
1471          * with this test...
1472          */
1473         if (!local->monitors && !local->cooked_mntrs) {
1474                 dev_kfree_skb(skb);
1475                 return;
1476         }
1477
1478         /* send frame to monitor interfaces now */
1479
1480         if (skb_headroom(skb) < sizeof(*rthdr)) {
1481                 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
1482                 dev_kfree_skb(skb);
1483                 return;
1484         }
1485
1486         rthdr = (struct ieee80211_tx_status_rtap_hdr*)
1487                                 skb_push(skb, sizeof(*rthdr));
1488
1489         memset(rthdr, 0, sizeof(*rthdr));
1490         rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
1491         rthdr->hdr.it_present =
1492                 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
1493                             (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
1494
1495         if (!(status->flags & IEEE80211_TX_STATUS_ACK) &&
1496             !is_multicast_ether_addr(hdr->addr1))
1497                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
1498
1499         if ((status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) &&
1500             (status->control.flags & IEEE80211_TXCTL_USE_CTS_PROTECT))
1501                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
1502         else if (status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS)
1503                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
1504
1505         rthdr->data_retries = status->retry_count;
1506
1507         /* XXX: is this sufficient for BPF? */
1508         skb_set_mac_header(skb, 0);
1509         skb->ip_summed = CHECKSUM_UNNECESSARY;
1510         skb->pkt_type = PACKET_OTHERHOST;
1511         skb->protocol = htons(ETH_P_802_2);
1512         memset(skb->cb, 0, sizeof(skb->cb));
1513
1514         rcu_read_lock();
1515         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
1516                 if (sdata->vif.type == IEEE80211_IF_TYPE_MNTR) {
1517                         if (!netif_running(sdata->dev))
1518                                 continue;
1519
1520                         if (prev_dev) {
1521                                 skb2 = skb_clone(skb, GFP_ATOMIC);
1522                                 if (skb2) {
1523                                         skb2->dev = prev_dev;
1524                                         netif_rx(skb2);
1525                                 }
1526                         }
1527
1528                         prev_dev = sdata->dev;
1529                 }
1530         }
1531         if (prev_dev) {
1532                 skb->dev = prev_dev;
1533                 netif_rx(skb);
1534                 skb = NULL;
1535         }
1536         rcu_read_unlock();
1537         dev_kfree_skb(skb);
1538 }
1539 EXPORT_SYMBOL(ieee80211_tx_status);
1540
1541 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
1542                                         const struct ieee80211_ops *ops)
1543 {
1544         struct ieee80211_local *local;
1545         int priv_size;
1546         struct wiphy *wiphy;
1547
1548         /* Ensure 32-byte alignment of our private data and hw private data.
1549          * We use the wiphy priv data for both our ieee80211_local and for
1550          * the driver's private data
1551          *
1552          * In memory it'll be like this:
1553          *
1554          * +-------------------------+
1555          * | struct wiphy           |
1556          * +-------------------------+
1557          * | struct ieee80211_local  |
1558          * +-------------------------+
1559          * | driver's private data   |
1560          * +-------------------------+
1561          *
1562          */
1563         priv_size = ((sizeof(struct ieee80211_local) +
1564                       NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
1565                     priv_data_len;
1566
1567         wiphy = wiphy_new(&mac80211_config_ops, priv_size);
1568
1569         if (!wiphy)
1570                 return NULL;
1571
1572         wiphy->privid = mac80211_wiphy_privid;
1573
1574         local = wiphy_priv(wiphy);
1575         local->hw.wiphy = wiphy;
1576
1577         local->hw.priv = (char *)local +
1578                          ((sizeof(struct ieee80211_local) +
1579                            NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
1580
1581         BUG_ON(!ops->tx);
1582         BUG_ON(!ops->start);
1583         BUG_ON(!ops->stop);
1584         BUG_ON(!ops->config);
1585         BUG_ON(!ops->add_interface);
1586         BUG_ON(!ops->remove_interface);
1587         BUG_ON(!ops->configure_filter);
1588         local->ops = ops;
1589
1590         local->hw.queues = 1; /* default */
1591
1592         local->bridge_packets = 1;
1593
1594         local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1595         local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1596         local->short_retry_limit = 7;
1597         local->long_retry_limit = 4;
1598         local->hw.conf.radio_enabled = 1;
1599
1600         INIT_LIST_HEAD(&local->interfaces);
1601
1602         spin_lock_init(&local->key_lock);
1603
1604         INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
1605
1606         sta_info_init(local);
1607
1608         tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
1609                      (unsigned long)local);
1610         tasklet_disable(&local->tx_pending_tasklet);
1611
1612         tasklet_init(&local->tasklet,
1613                      ieee80211_tasklet_handler,
1614                      (unsigned long) local);
1615         tasklet_disable(&local->tasklet);
1616
1617         skb_queue_head_init(&local->skb_queue);
1618         skb_queue_head_init(&local->skb_queue_unreliable);
1619
1620         return local_to_hw(local);
1621 }
1622 EXPORT_SYMBOL(ieee80211_alloc_hw);
1623
1624 int ieee80211_register_hw(struct ieee80211_hw *hw)
1625 {
1626         struct ieee80211_local *local = hw_to_local(hw);
1627         const char *name;
1628         int result;
1629         enum ieee80211_band band;
1630         struct net_device *mdev;
1631         struct ieee80211_sub_if_data *sdata;
1632
1633         /*
1634          * generic code guarantees at least one band,
1635          * set this very early because much code assumes
1636          * that hw.conf.channel is assigned
1637          */
1638         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
1639                 struct ieee80211_supported_band *sband;
1640
1641                 sband = local->hw.wiphy->bands[band];
1642                 if (sband) {
1643                         /* init channel we're on */
1644                         local->hw.conf.channel =
1645                         local->oper_channel =
1646                         local->scan_channel = &sband->channels[0];
1647                         break;
1648                 }
1649         }
1650
1651         result = wiphy_register(local->hw.wiphy);
1652         if (result < 0)
1653                 return result;
1654
1655         /* for now, mdev needs sub_if_data :/ */
1656         mdev = alloc_netdev(sizeof(struct ieee80211_sub_if_data),
1657                             "wmaster%d", ether_setup);
1658         if (!mdev)
1659                 goto fail_mdev_alloc;
1660
1661         sdata = IEEE80211_DEV_TO_SUB_IF(mdev);
1662         mdev->ieee80211_ptr = &sdata->wdev;
1663         sdata->wdev.wiphy = local->hw.wiphy;
1664
1665         local->mdev = mdev;
1666
1667         ieee80211_rx_bss_list_init(mdev);
1668
1669         mdev->hard_start_xmit = ieee80211_master_start_xmit;
1670         mdev->open = ieee80211_master_open;
1671         mdev->stop = ieee80211_master_stop;
1672         mdev->type = ARPHRD_IEEE80211;
1673         mdev->header_ops = &ieee80211_header_ops;
1674         mdev->set_multicast_list = ieee80211_master_set_multicast_list;
1675
1676         sdata->vif.type = IEEE80211_IF_TYPE_AP;
1677         sdata->dev = mdev;
1678         sdata->local = local;
1679         sdata->u.ap.force_unicast_rateidx = -1;
1680         sdata->u.ap.max_ratectrl_rateidx = -1;
1681         ieee80211_if_sdata_init(sdata);
1682
1683         /* no RCU needed since we're still during init phase */
1684         list_add_tail(&sdata->list, &local->interfaces);
1685
1686         name = wiphy_dev(local->hw.wiphy)->driver->name;
1687         local->hw.workqueue = create_singlethread_workqueue(name);
1688         if (!local->hw.workqueue) {
1689                 result = -ENOMEM;
1690                 goto fail_workqueue;
1691         }
1692
1693         /*
1694          * The hardware needs headroom for sending the frame,
1695          * and we need some headroom for passing the frame to monitor
1696          * interfaces, but never both at the same time.
1697          */
1698         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1699                                    sizeof(struct ieee80211_tx_status_rtap_hdr));
1700
1701         debugfs_hw_add(local);
1702
1703         local->hw.conf.beacon_int = 1000;
1704
1705         local->wstats_flags |= local->hw.max_rssi ?
1706                                IW_QUAL_LEVEL_UPDATED : IW_QUAL_LEVEL_INVALID;
1707         local->wstats_flags |= local->hw.max_signal ?
1708                                IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
1709         local->wstats_flags |= local->hw.max_noise ?
1710                                IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
1711         if (local->hw.max_rssi < 0 || local->hw.max_noise < 0)
1712                 local->wstats_flags |= IW_QUAL_DBM;
1713
1714         result = sta_info_start(local);
1715         if (result < 0)
1716                 goto fail_sta_info;
1717
1718         rtnl_lock();
1719         result = dev_alloc_name(local->mdev, local->mdev->name);
1720         if (result < 0)
1721                 goto fail_dev;
1722
1723         memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1724         SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
1725
1726         result = register_netdevice(local->mdev);
1727         if (result < 0)
1728                 goto fail_dev;
1729
1730         ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1731         ieee80211_if_set_type(local->mdev, IEEE80211_IF_TYPE_AP);
1732
1733         result = ieee80211_init_rate_ctrl_alg(local,
1734                                               hw->rate_control_algorithm);
1735         if (result < 0) {
1736                 printk(KERN_DEBUG "%s: Failed to initialize rate control "
1737                        "algorithm\n", wiphy_name(local->hw.wiphy));
1738                 goto fail_rate;
1739         }
1740
1741         result = ieee80211_wep_init(local);
1742
1743         if (result < 0) {
1744                 printk(KERN_DEBUG "%s: Failed to initialize wep\n",
1745                        wiphy_name(local->hw.wiphy));
1746                 goto fail_wep;
1747         }
1748
1749         ieee80211_install_qdisc(local->mdev);
1750
1751         /* add one default STA interface */
1752         result = ieee80211_if_add(local->mdev, "wlan%d", NULL,
1753                                   IEEE80211_IF_TYPE_STA, NULL);
1754         if (result)
1755                 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
1756                        wiphy_name(local->hw.wiphy));
1757
1758         local->reg_state = IEEE80211_DEV_REGISTERED;
1759         rtnl_unlock();
1760
1761         ieee80211_led_init(local);
1762
1763         return 0;
1764
1765 fail_wep:
1766         rate_control_deinitialize(local);
1767 fail_rate:
1768         ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1769         unregister_netdevice(local->mdev);
1770         local->mdev = NULL;
1771 fail_dev:
1772         rtnl_unlock();
1773         sta_info_stop(local);
1774 fail_sta_info:
1775         debugfs_hw_del(local);
1776         destroy_workqueue(local->hw.workqueue);
1777 fail_workqueue:
1778         if (local->mdev != NULL) {
1779                 ieee80211_if_free(local->mdev);
1780                 local->mdev = NULL;
1781         }
1782 fail_mdev_alloc:
1783         wiphy_unregister(local->hw.wiphy);
1784         return result;
1785 }
1786 EXPORT_SYMBOL(ieee80211_register_hw);
1787
1788 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1789 {
1790         struct ieee80211_local *local = hw_to_local(hw);
1791         struct ieee80211_sub_if_data *sdata, *tmp;
1792
1793         tasklet_kill(&local->tx_pending_tasklet);
1794         tasklet_kill(&local->tasklet);
1795
1796         rtnl_lock();
1797
1798         BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED);
1799
1800         local->reg_state = IEEE80211_DEV_UNREGISTERED;
1801
1802         /*
1803          * At this point, interface list manipulations are fine
1804          * because the driver cannot be handing us frames any
1805          * more and the tasklet is killed.
1806          */
1807
1808         /*
1809          * First, we remove all non-master interfaces. Do this because they
1810          * may have bss pointer dependency on the master, and when we free
1811          * the master these would be freed as well, breaking our list
1812          * iteration completely.
1813          */
1814         list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1815                 if (sdata->dev == local->mdev)
1816                         continue;
1817                 list_del(&sdata->list);
1818                 __ieee80211_if_del(local, sdata);
1819         }
1820
1821         /* then, finally, remove the master interface */
1822         __ieee80211_if_del(local, IEEE80211_DEV_TO_SUB_IF(local->mdev));
1823
1824         rtnl_unlock();
1825
1826         ieee80211_rx_bss_list_deinit(local->mdev);
1827         ieee80211_clear_tx_pending(local);
1828         sta_info_stop(local);
1829         rate_control_deinitialize(local);
1830         debugfs_hw_del(local);
1831
1832         if (skb_queue_len(&local->skb_queue)
1833                         || skb_queue_len(&local->skb_queue_unreliable))
1834                 printk(KERN_WARNING "%s: skb_queue not empty\n",
1835                        wiphy_name(local->hw.wiphy));
1836         skb_queue_purge(&local->skb_queue);
1837         skb_queue_purge(&local->skb_queue_unreliable);
1838
1839         destroy_workqueue(local->hw.workqueue);
1840         wiphy_unregister(local->hw.wiphy);
1841         ieee80211_wep_free(local);
1842         ieee80211_led_exit(local);
1843         ieee80211_if_free(local->mdev);
1844         local->mdev = NULL;
1845 }
1846 EXPORT_SYMBOL(ieee80211_unregister_hw);
1847
1848 void ieee80211_free_hw(struct ieee80211_hw *hw)
1849 {
1850         struct ieee80211_local *local = hw_to_local(hw);
1851
1852         wiphy_free(local->hw.wiphy);
1853 }
1854 EXPORT_SYMBOL(ieee80211_free_hw);
1855
1856 static int __init ieee80211_init(void)
1857 {
1858         struct sk_buff *skb;
1859         int ret;
1860
1861         BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data) > sizeof(skb->cb));
1862
1863         ret = rc80211_pid_init();
1864         if (ret)
1865                 goto out;
1866
1867         ret = ieee80211_wme_register();
1868         if (ret) {
1869                 printk(KERN_DEBUG "ieee80211_init: failed to "
1870                        "initialize WME (err=%d)\n", ret);
1871                 goto out_cleanup_pid;
1872         }
1873
1874         ieee80211_debugfs_netdev_init();
1875
1876         return 0;
1877
1878  out_cleanup_pid:
1879         rc80211_pid_exit();
1880  out:
1881         return ret;
1882 }
1883
1884 static void __exit ieee80211_exit(void)
1885 {
1886         rc80211_pid_exit();
1887
1888         /*
1889          * For key todo, it'll be empty by now but the work
1890          * might still be scheduled.
1891          */
1892         flush_scheduled_work();
1893
1894         if (mesh_allocated)
1895                 ieee80211s_stop();
1896
1897         ieee80211_wme_unregister();
1898         ieee80211_debugfs_netdev_exit();
1899 }
1900
1901
1902 subsys_initcall(ieee80211_init);
1903 module_exit(ieee80211_exit);
1904
1905 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1906 MODULE_LICENSE("GPL");