net/mac80211/ieee80211_i.h

   1 /*
   2  * Copyright 2002-2005, Instant802 Networks, Inc.
   3  * Copyright 2005, Devicescape Software, Inc.
   4  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   5  * Copyright 2007-2010  Johannes Berg <johannes@sipsolutions.net>
   6  * Copyright 2013-2014  Intel Mobile Communications GmbH
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  */
  12
  13 #ifndef IEEE80211_I_H
  14 #define IEEE80211_I_H
  15
  16 #include <linux/kernel.h>
  17 #include <linux/device.h>
  18 #include <linux/if_ether.h>
  19 #include <linux/interrupt.h>
  20 #include <linux/list.h>
  21 #include <linux/netdevice.h>
  22 #include <linux/skbuff.h>
  23 #include <linux/workqueue.h>
  24 #include <linux/types.h>
  25 #include <linux/spinlock.h>
  26 #include <linux/etherdevice.h>
  27 #include <linux/leds.h>
  28 #include <linux/idr.h>
  29 #include <linux/rhashtable.h>
  30 #include <net/ieee80211_radiotap.h>
  31 #include <net/cfg80211.h>
  32 #include <net/mac80211.h>
  33 #include <net/fq.h>
  34 #include "key.h"
  35 #include "sta_info.h"
  36 #include "debug.h"
  37
  38 extern const struct cfg80211_ops mac80211_config_ops;
  39
  40 struct ieee80211_local;
  41
  42 /* Maximum number of broadcast/multicast frames to buffer when some of the
  43  * associated stations are using power saving. */
  44 #define AP_MAX_BC_BUFFER 128
  45
  46 /* Maximum number of frames buffered to all STAs, including multicast frames.
  47  * Note: increasing this limit increases the potential memory requirement. Each
  48  * frame can be up to about 2 kB long. */
  49 #define TOTAL_MAX_TX_BUFFER 512
  50
  51 /* Required encryption head and tailroom */
  52 #define IEEE80211_ENCRYPT_HEADROOM 8
  53 #define IEEE80211_ENCRYPT_TAILROOM 18
  54
  55 /* IEEE 802.11 (Ch. 9.5 Defragmentation) requires support for concurrent
  56  * reception of at least three fragmented frames. This limit can be increased
  57  * by changing this define, at the cost of slower frame reassembly and
  58  * increased memory use (about 2 kB of RAM per entry). */
  59 #define IEEE80211_FRAGMENT_MAX 4
  60
  61 /* power level hasn't been configured (or set to automatic) */
  62 #define IEEE80211_UNSET_POWER_LEVEL     INT_MIN
  63
  64 /*
  65  * Some APs experience problems when working with U-APSD. Decreasing the
  66  * probability of that happening by using legacy mode for all ACs but VO isn't
  67  * enough.
  68  *
  69  * Cisco 4410N originally forced us to enable VO by default only because it
  70  * treated non-VO ACs as legacy.
  71  *
  72  * However some APs (notably Netgear R7000) silently reclassify packets to
  73  * different ACs. Since u-APSD ACs require trigger frames for frame retrieval
  74  * clients would never see some frames (e.g. ARP responses) or would fetch them
  75  * accidentally after a long time.
  76  *
  77  * It makes little sense to enable u-APSD queues by default because it needs
  78  * userspace applications to be aware of it to actually take advantage of the
  79  * possible additional powersavings. Implicitly depending on driver autotrigger
  80  * frame support doesn't make much sense.
  81  */
  82 #define IEEE80211_DEFAULT_UAPSD_QUEUES 0
  83
  84 #define IEEE80211_DEFAULT_MAX_SP_LEN            \
  85         IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL
  86
  87 #define IEEE80211_DEAUTH_FRAME_LEN      (24 /* hdr */ + 2 /* reason */)
  88
  89 struct ieee80211_fragment_entry {
  90         struct sk_buff_head skb_list;
  91         unsigned long first_frag_time;
  92         u16 seq;
  93         u16 extra_len;
  94         u16 last_frag;
  95         u8 rx_queue;
  96         bool check_sequential_pn; /* needed for CCMP/GCMP */
  97         u8 last_pn[6]; /* PN of the last fragment if CCMP was used */
  98 };
  99
 100
 101 struct ieee80211_bss {
 102         u32 device_ts_beacon, device_ts_presp;
 103
 104         bool wmm_used;
 105         bool uapsd_supported;
 106
 107 #define IEEE80211_MAX_SUPP_RATES 32
 108         u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
 109         size_t supp_rates_len;
 110         struct ieee80211_rate *beacon_rate;
 111
 112         /*
 113          * During association, we save an ERP value from a probe response so
 114          * that we can feed ERP info to the driver when handling the
 115          * association completes. these fields probably won't be up-to-date
 116          * otherwise, you probably don't want to use them.
 117          */
 118         bool has_erp_value;
 119         u8 erp_value;
 120
 121         /* Keep track of the corruption of the last beacon/probe response. */
 122         u8 corrupt_data;
 123
 124         /* Keep track of what bits of information we have valid info for. */
 125         u8 valid_data;
 126 };
 127
 128 /**
 129  * enum ieee80211_corrupt_data_flags - BSS data corruption flags
 130  * @IEEE80211_BSS_CORRUPT_BEACON: last beacon frame received was corrupted
 131  * @IEEE80211_BSS_CORRUPT_PROBE_RESP: last probe response received was corrupted
 132  *
 133  * These are bss flags that are attached to a bss in the
 134  * @corrupt_data field of &struct ieee80211_bss.
 135  */
 136 enum ieee80211_bss_corrupt_data_flags {
 137         IEEE80211_BSS_CORRUPT_BEACON            = BIT(0),
 138         IEEE80211_BSS_CORRUPT_PROBE_RESP        = BIT(1)
 139 };
 140
 141 /**
 142  * enum ieee80211_valid_data_flags - BSS valid data flags
 143  * @IEEE80211_BSS_VALID_WMM: WMM/UAPSD data was gathered from non-corrupt IE
 144  * @IEEE80211_BSS_VALID_RATES: Supported rates were gathered from non-corrupt IE
 145  * @IEEE80211_BSS_VALID_ERP: ERP flag was gathered from non-corrupt IE
 146  *
 147  * These are bss flags that are attached to a bss in the
 148  * @valid_data field of &struct ieee80211_bss.  They show which parts
 149  * of the data structure were received as a result of an un-corrupted
 150  * beacon/probe response.
 151  */
 152 enum ieee80211_bss_valid_data_flags {
 153         IEEE80211_BSS_VALID_WMM                 = BIT(1),
 154         IEEE80211_BSS_VALID_RATES               = BIT(2),
 155         IEEE80211_BSS_VALID_ERP                 = BIT(3)
 156 };
 157
 158 typedef unsigned __bitwise__ ieee80211_tx_result;
 159 #define TX_CONTINUE     ((__force ieee80211_tx_result) 0u)
 160 #define TX_DROP         ((__force ieee80211_tx_result) 1u)
 161 #define TX_QUEUED       ((__force ieee80211_tx_result) 2u)
 162
 163 #define IEEE80211_TX_UNICAST            BIT(1)
 164 #define IEEE80211_TX_PS_BUFFERED        BIT(2)
 165
 166 struct ieee80211_tx_data {
 167         struct sk_buff *skb;
 168         struct sk_buff_head skbs;
 169         struct ieee80211_local *local;
 170         struct ieee80211_sub_if_data *sdata;
 171         struct sta_info *sta;
 172         struct ieee80211_key *key;
 173         struct ieee80211_tx_rate rate;
 174
 175         unsigned int flags;
 176 };
 177
 178
 179 typedef unsigned __bitwise__ ieee80211_rx_result;
 180 #define RX_CONTINUE             ((__force ieee80211_rx_result) 0u)
 181 #define RX_DROP_UNUSABLE        ((__force ieee80211_rx_result) 1u)
 182 #define RX_DROP_MONITOR         ((__force ieee80211_rx_result) 2u)
 183 #define RX_QUEUED               ((__force ieee80211_rx_result) 3u)
 184
 185 /**
 186  * enum ieee80211_packet_rx_flags - packet RX flags
 187  * @IEEE80211_RX_AMSDU: a-MSDU packet
 188  * @IEEE80211_RX_MALFORMED_ACTION_FRM: action frame is malformed
 189  * @IEEE80211_RX_DEFERRED_RELEASE: frame was subjected to receive reordering
 190  *
 191  * These are per-frame flags that are attached to a frame in the
 192  * @rx_flags field of &struct ieee80211_rx_status.
 193  */
 194 enum ieee80211_packet_rx_flags {
 195         IEEE80211_RX_AMSDU                      = BIT(3),
 196         IEEE80211_RX_MALFORMED_ACTION_FRM       = BIT(4),
 197         IEEE80211_RX_DEFERRED_RELEASE           = BIT(5),
 198 };
 199
 200 /**
 201  * enum ieee80211_rx_flags - RX data flags
 202  *
 203  * @IEEE80211_RX_CMNTR: received on cooked monitor already
 204  * @IEEE80211_RX_BEACON_REPORTED: This frame was already reported
 205  *      to cfg80211_report_obss_beacon().
 206  *
 207  * These flags are used across handling multiple interfaces
 208  * for a single frame.
 209  */
 210 enum ieee80211_rx_flags {
 211         IEEE80211_RX_CMNTR              = BIT(0),
 212         IEEE80211_RX_BEACON_REPORTED    = BIT(1),
 213 };
 214
 215 struct ieee80211_rx_data {
 216         struct napi_struct *napi;
 217         struct sk_buff *skb;
 218         struct ieee80211_local *local;
 219         struct ieee80211_sub_if_data *sdata;
 220         struct sta_info *sta;
 221         struct ieee80211_key *key;
 222
 223         unsigned int flags;
 224
 225         /*
 226          * Index into sequence numbers array, 0..16
 227          * since the last (16) is used for non-QoS,
 228          * will be 16 on non-QoS frames.
 229          */
 230         int seqno_idx;
 231
 232         /*
 233          * Index into the security IV/PN arrays, 0..16
 234          * since the last (16) is used for CCMP-encrypted
 235          * management frames, will be set to 16 on mgmt
 236          * frames and 0 on non-QoS frames.
 237          */
 238         int security_idx;
 239
 240         u32 tkip_iv32;
 241         u16 tkip_iv16;
 242 };
 243
 244 struct ieee80211_csa_settings {
 245         const u16 *counter_offsets_beacon;
 246         const u16 *counter_offsets_presp;
 247
 248         int n_counter_offsets_beacon;
 249         int n_counter_offsets_presp;
 250
 251         u8 count;
 252 };
 253
 254 struct beacon_data {
 255         u8 *head, *tail;
 256         int head_len, tail_len;
 257         struct ieee80211_meshconf_ie *meshconf;
 258         u16 csa_counter_offsets[IEEE80211_MAX_CSA_COUNTERS_NUM];
 259         u8 csa_current_counter;
 260         struct rcu_head rcu_head;
 261 };
 262
 263 struct probe_resp {
 264         struct rcu_head rcu_head;
 265         int len;
 266         u16 csa_counter_offsets[IEEE80211_MAX_CSA_COUNTERS_NUM];
 267         u8 data[0];
 268 };
 269
 270 struct ps_data {
 271         /* yes, this looks ugly, but guarantees that we can later use
 272          * bitmap_empty :)
 273          * NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */
 274         u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)]
 275                         __aligned(__alignof__(unsigned long));
 276         struct sk_buff_head bc_buf;
 277         atomic_t num_sta_ps; /* number of stations in PS mode */
 278         int dtim_count;
 279         bool dtim_bc_mc;
 280 };
 281
 282 struct ieee80211_if_ap {
 283         struct beacon_data __rcu *beacon;
 284         struct probe_resp __rcu *probe_resp;
 285
 286         /* to be used after channel switch. */
 287         struct cfg80211_beacon_data *next_beacon;
 288         struct list_head vlans; /* write-protected with RTNL and local->mtx */
 289
 290         struct ps_data ps;
 291         atomic_t num_mcast_sta; /* number of stations receiving multicast */
 292         enum ieee80211_smps_mode req_smps, /* requested smps mode */
 293                          driver_smps_mode; /* smps mode request */
 294
 295         struct work_struct request_smps_work;
 296 };
 297
 298 struct ieee80211_if_wds {
 299         struct sta_info *sta;
 300         u8 remote_addr[ETH_ALEN];
 301 };
 302
 303 struct ieee80211_if_vlan {
 304         struct list_head list; /* write-protected with RTNL and local->mtx */
 305
 306         /* used for all tx if the VLAN is configured to 4-addr mode */
 307         struct sta_info __rcu *sta;
 308 };
 309
 310 struct mesh_stats {
 311         __u32 fwded_mcast;              /* Mesh forwarded multicast frames */
 312         __u32 fwded_unicast;            /* Mesh forwarded unicast frames */
 313         __u32 fwded_frames;             /* Mesh total forwarded frames */
 314         __u32 dropped_frames_ttl;       /* Not transmitted since mesh_ttl == 0*/
 315         __u32 dropped_frames_no_route;  /* Not transmitted, no route found */
 316         __u32 dropped_frames_congestion;/* Not forwarded due to congestion */
 317 };
 318
 319 #define PREQ_Q_F_START          0x1
 320 #define PREQ_Q_F_REFRESH        0x2
 321 struct mesh_preq_queue {
 322         struct list_head list;
 323         u8 dst[ETH_ALEN];
 324         u8 flags;
 325 };
 326
 327 struct ieee80211_roc_work {
 328         struct list_head list;
 329
 330         struct ieee80211_sub_if_data *sdata;
 331
 332         struct ieee80211_channel *chan;
 333
 334         bool started, abort, hw_begun, notified;
 335         bool on_channel;
 336
 337         unsigned long start_time;
 338
 339         u32 duration, req_duration;
 340         struct sk_buff *frame;
 341         u64 cookie, mgmt_tx_cookie;
 342         enum ieee80211_roc_type type;
 343 };
 344
 345 /* flags used in struct ieee80211_if_managed.flags */
 346 enum ieee80211_sta_flags {
 347         IEEE80211_STA_CONNECTION_POLL   = BIT(1),
 348         IEEE80211_STA_CONTROL_PORT      = BIT(2),
 349         IEEE80211_STA_DISABLE_HT        = BIT(4),
 350         IEEE80211_STA_MFP_ENABLED       = BIT(6),
 351         IEEE80211_STA_UAPSD_ENABLED     = BIT(7),
 352         IEEE80211_STA_NULLFUNC_ACKED    = BIT(8),
 353         IEEE80211_STA_RESET_SIGNAL_AVE  = BIT(9),
 354         IEEE80211_STA_DISABLE_40MHZ     = BIT(10),
 355         IEEE80211_STA_DISABLE_VHT       = BIT(11),
 356         IEEE80211_STA_DISABLE_80P80MHZ  = BIT(12),
 357         IEEE80211_STA_DISABLE_160MHZ    = BIT(13),
 358         IEEE80211_STA_DISABLE_WMM       = BIT(14),
 359         IEEE80211_STA_ENABLE_RRM        = BIT(15),
 360 };
 361
 362 struct ieee80211_mgd_auth_data {
 363         struct cfg80211_bss *bss;
 364         unsigned long timeout;
 365         int tries;
 366         u16 algorithm, expected_transaction;
 367
 368         u8 key[WLAN_KEY_LEN_WEP104];
 369         u8 key_len, key_idx;
 370         bool done;
 371         bool timeout_started;
 372
 373         u16 sae_trans, sae_status;
 374         size_t data_len;
 375         u8 data[];
 376 };
 377
 378 struct ieee80211_mgd_assoc_data {
 379         struct cfg80211_bss *bss;
 380         const u8 *supp_rates;
 381
 382         unsigned long timeout;
 383         int tries;
 384
 385         u16 capability;
 386         u8 prev_bssid[ETH_ALEN];
 387         u8 ssid[IEEE80211_MAX_SSID_LEN];
 388         u8 ssid_len;
 389         u8 supp_rates_len;
 390         bool wmm, uapsd;
 391         bool need_beacon;
 392         bool synced;
 393         bool timeout_started;
 394
 395         u8 ap_ht_param;
 396
 397         struct ieee80211_vht_cap ap_vht_cap;
 398
 399         size_t ie_len;
 400         u8 ie[];
 401 };
 402
 403 struct ieee80211_sta_tx_tspec {
 404         /* timestamp of the first packet in the time slice */
 405         unsigned long time_slice_start;
 406
 407         u32 admitted_time; /* in usecs, unlike over the air */
 408         u8 tsid;
 409         s8 up; /* signed to be able to invalidate with -1 during teardown */
 410
 411         /* consumed TX time in microseconds in the time slice */
 412         u32 consumed_tx_time;
 413         enum {
 414                 TX_TSPEC_ACTION_NONE = 0,
 415                 TX_TSPEC_ACTION_DOWNGRADE,
 416                 TX_TSPEC_ACTION_STOP_DOWNGRADE,
 417         } action;
 418         bool downgraded;
 419 };
 420
 421 DECLARE_EWMA(beacon_signal, 16, 4)
 422
 423 struct ieee80211_if_managed {
 424         struct timer_list timer;
 425         struct timer_list conn_mon_timer;
 426         struct timer_list bcn_mon_timer;
 427         struct timer_list chswitch_timer;
 428         struct work_struct monitor_work;
 429         struct work_struct chswitch_work;
 430         struct work_struct beacon_connection_loss_work;
 431         struct work_struct csa_connection_drop_work;
 432
 433         unsigned long beacon_timeout;
 434         unsigned long probe_timeout;
 435         int probe_send_count;
 436         bool nullfunc_failed;
 437         bool connection_loss;
 438
 439         struct cfg80211_bss *associated;
 440         struct ieee80211_mgd_auth_data *auth_data;
 441         struct ieee80211_mgd_assoc_data *assoc_data;
 442
 443         u8 bssid[ETH_ALEN];
 444
 445         u16 aid;
 446
 447         bool powersave; /* powersave requested for this iface */
 448         bool broken_ap; /* AP is broken -- turn off powersave */
 449         bool have_beacon;
 450         u8 dtim_period;
 451         enum ieee80211_smps_mode req_smps, /* requested smps mode */
 452                                  driver_smps_mode; /* smps mode request */
 453
 454         struct work_struct request_smps_work;
 455
 456         unsigned int flags;
 457
 458         bool csa_waiting_bcn;
 459         bool csa_ignored_same_chan;
 460
 461         bool beacon_crc_valid;
 462         u32 beacon_crc;
 463
 464         bool status_acked;
 465         bool status_received;
 466         __le16 status_fc;
 467
 468         enum {
 469                 IEEE80211_MFP_DISABLED,
 470                 IEEE80211_MFP_OPTIONAL,
 471                 IEEE80211_MFP_REQUIRED
 472         } mfp; /* management frame protection */
 473
 474         /*
 475          * Bitmask of enabled u-apsd queues,
 476          * IEEE80211_WMM_IE_STA_QOSINFO_AC_BE & co. Needs a new association
 477          * to take effect.
 478          */
 479         unsigned int uapsd_queues;
 480
 481         /*
 482          * Maximum number of buffered frames AP can deliver during a
 483          * service period, IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL or similar.
 484          * Needs a new association to take effect.
 485          */
 486         unsigned int uapsd_max_sp_len;
 487
 488         int wmm_last_param_set;
 489
 490         u8 use_4addr;
 491
 492         s16 p2p_noa_index;
 493
 494         struct ewma_beacon_signal ave_beacon_signal;
 495
 496         /*
 497          * Number of Beacon frames used in ave_beacon_signal. This can be used
 498          * to avoid generating less reliable cqm events that would be based
 499          * only on couple of received frames.
 500          */
 501         unsigned int count_beacon_signal;
 502
 503         /* Number of times beacon loss was invoked. */
 504         unsigned int beacon_loss_count;
 505
 506         /*
 507          * Last Beacon frame signal strength average (ave_beacon_signal / 16)
 508          * that triggered a cqm event. 0 indicates that no event has been
 509          * generated for the current association.
 510          */
 511         int last_cqm_event_signal;
 512
 513         /*
 514          * State variables for keeping track of RSSI of the AP currently
 515          * connected to and informing driver when RSSI has gone
 516          * below/above a certain threshold.
 517          */
 518         int rssi_min_thold, rssi_max_thold;
 519         int last_ave_beacon_signal;
 520
 521         struct ieee80211_ht_cap ht_capa; /* configured ht-cap over-rides */
 522         struct ieee80211_ht_cap ht_capa_mask; /* Valid parts of ht_capa */
 523         struct ieee80211_vht_cap vht_capa; /* configured VHT overrides */
 524         struct ieee80211_vht_cap vht_capa_mask; /* Valid parts of vht_capa */
 525
 526         /* TDLS support */
 527         u8 tdls_peer[ETH_ALEN] __aligned(2);
 528         struct delayed_work tdls_peer_del_work;
 529         struct sk_buff *orig_teardown_skb; /* The original teardown skb */
 530         struct sk_buff *teardown_skb; /* A copy to send through the AP */
 531         spinlock_t teardown_lock; /* To lock changing teardown_skb */
 532         bool tdls_chan_switch_prohibited;
 533         bool tdls_wider_bw_prohibited;
 534
 535         /* WMM-AC TSPEC support */
 536         struct ieee80211_sta_tx_tspec tx_tspec[IEEE80211_NUM_ACS];
 537         /* Use a separate work struct so that we can do something here
 538          * while the sdata->work is flushing the queues, for example.
 539          * otherwise, in scenarios where we hardly get any traffic out
 540          * on the BE queue, but there's a lot of VO traffic, we might
 541          * get stuck in a downgraded situation and flush takes forever.
 542          */
 543         struct delayed_work tx_tspec_wk;
 544 };
 545
 546 struct ieee80211_if_ibss {
 547         struct timer_list timer;
 548         struct work_struct csa_connection_drop_work;
 549
 550         unsigned long last_scan_completed;
 551
 552         u32 basic_rates;
 553
 554         bool fixed_bssid;
 555         bool fixed_channel;
 556         bool privacy;
 557
 558         bool control_port;
 559         bool userspace_handles_dfs;
 560
 561         u8 bssid[ETH_ALEN] __aligned(2);
 562         u8 ssid[IEEE80211_MAX_SSID_LEN];
 563         u8 ssid_len, ie_len;
 564         u8 *ie;
 565         struct cfg80211_chan_def chandef;
 566
 567         unsigned long ibss_join_req;
 568         /* probe response/beacon for IBSS */
 569         struct beacon_data __rcu *presp;
 570
 571         struct ieee80211_ht_cap ht_capa; /* configured ht-cap over-rides */
 572         struct ieee80211_ht_cap ht_capa_mask; /* Valid parts of ht_capa */
 573
 574         spinlock_t incomplete_lock;
 575         struct list_head incomplete_stations;
 576
 577         enum {
 578                 IEEE80211_IBSS_MLME_SEARCH,
 579                 IEEE80211_IBSS_MLME_JOINED,
 580         } state;
 581 };
 582
 583 /**
 584  * struct ieee80211_if_ocb - OCB mode state
 585  *
 586  * @housekeeping_timer: timer for periodic invocation of a housekeeping task
 587  * @wrkq_flags: OCB deferred task action
 588  * @incomplete_lock: delayed STA insertion lock
 589  * @incomplete_stations: list of STAs waiting for delayed insertion
 590  * @joined: indication if the interface is connected to an OCB network
 591  */
 592 struct ieee80211_if_ocb {
 593         struct timer_list housekeeping_timer;
 594         unsigned long wrkq_flags;
 595
 596         spinlock_t incomplete_lock;
 597         struct list_head incomplete_stations;
 598
 599         bool joined;
 600 };
 601
 602 /**
 603  * struct ieee80211_mesh_sync_ops - Extensible synchronization framework interface
 604  *
 605  * these declarations define the interface, which enables
 606  * vendor-specific mesh synchronization
 607  *
 608  */
 609 struct ieee802_11_elems;
 610 struct ieee80211_mesh_sync_ops {
 611         void (*rx_bcn_presp)(struct ieee80211_sub_if_data *sdata,
 612                              u16 stype,
 613                              struct ieee80211_mgmt *mgmt,
 614                              struct ieee802_11_elems *elems,
 615                              struct ieee80211_rx_status *rx_status);
 616
 617         /* should be called with beacon_data under RCU read lock */
 618         void (*adjust_tbtt)(struct ieee80211_sub_if_data *sdata,
 619                             struct beacon_data *beacon);
 620         /* add other framework functions here */
 621 };
 622
 623 struct mesh_csa_settings {
 624         struct rcu_head rcu_head;
 625         struct cfg80211_csa_settings settings;
 626 };
 627
 628 struct ieee80211_if_mesh {
 629         struct timer_list housekeeping_timer;
 630         struct timer_list mesh_path_timer;
 631         struct timer_list mesh_path_root_timer;
 632
 633         unsigned long wrkq_flags;
 634         unsigned long mbss_changed;
 635
 636         u8 mesh_id[IEEE80211_MAX_MESH_ID_LEN];
 637         size_t mesh_id_len;
 638         /* Active Path Selection Protocol Identifier */
 639         u8 mesh_pp_id;
 640         /* Active Path Selection Metric Identifier */
 641         u8 mesh_pm_id;
 642         /* Congestion Control Mode Identifier */
 643         u8 mesh_cc_id;
 644         /* Synchronization Protocol Identifier */
 645         u8 mesh_sp_id;
 646         /* Authentication Protocol Identifier */
 647         u8 mesh_auth_id;
 648         /* Local mesh Sequence Number */
 649         u32 sn;
 650         /* Last used PREQ ID */
 651         u32 preq_id;
 652         atomic_t mpaths;
 653         /* Timestamp of last SN update */
 654         unsigned long last_sn_update;
 655         /* Time when it's ok to send next PERR */
 656         unsigned long next_perr;
 657         /* Timestamp of last PREQ sent */
 658         unsigned long last_preq;
 659         struct mesh_rmc *rmc;
 660         spinlock_t mesh_preq_queue_lock;
 661         struct mesh_preq_queue preq_queue;
 662         int preq_queue_len;
 663         struct mesh_stats mshstats;
 664         struct mesh_config mshcfg;
 665         atomic_t estab_plinks;
 666         u32 mesh_seqnum;
 667         bool accepting_plinks;
 668         int num_gates;
 669         struct beacon_data __rcu *beacon;
 670         const u8 *ie;
 671         u8 ie_len;
 672         enum {
 673                 IEEE80211_MESH_SEC_NONE = 0x0,
 674                 IEEE80211_MESH_SEC_AUTHED = 0x1,
 675                 IEEE80211_MESH_SEC_SECURED = 0x2,
 676         } security;
 677         bool user_mpm;
 678         /* Extensible Synchronization Framework */
 679         const struct ieee80211_mesh_sync_ops *sync_ops;
 680         s64 sync_offset_clockdrift_max;
 681         spinlock_t sync_offset_lock;
 682         bool adjusting_tbtt;
 683         /* mesh power save */
 684         enum nl80211_mesh_power_mode nonpeer_pm;
 685         int ps_peers_light_sleep;
 686         int ps_peers_deep_sleep;
 687         struct ps_data ps;
 688         /* Channel Switching Support */
 689         struct mesh_csa_settings __rcu *csa;
 690         enum {
 691                 IEEE80211_MESH_CSA_ROLE_NONE,
 692                 IEEE80211_MESH_CSA_ROLE_INIT,
 693                 IEEE80211_MESH_CSA_ROLE_REPEATER,
 694         } csa_role;
 695         u8 chsw_ttl;
 696         u16 pre_value;
 697
 698         /* offset from skb->data while building IE */
 699         int meshconf_offset;
 700
 701         struct mesh_table *mesh_paths;
 702         struct mesh_table *mpp_paths; /* Store paths for MPP&MAP */
 703         int mesh_paths_generation;
 704         int mpp_paths_generation;
 705 };
 706
 707 #ifdef CONFIG_MAC80211_MESH
 708 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 709         do { (msh)->mshstats.name++; } while (0)
 710 #else
 711 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 712         do { } while (0)
 713 #endif
 714
 715 /**
 716  * enum ieee80211_sub_if_data_flags - virtual interface flags
 717  *
 718  * @IEEE80211_SDATA_ALLMULTI: interface wants all multicast packets
 719  * @IEEE80211_SDATA_OPERATING_GMODE: operating in G-only mode
 720  * @IEEE80211_SDATA_DONT_BRIDGE_PACKETS: bridge packets between
 721  *      associated stations and deliver multicast frames both
 722  *      back to wireless media and to the local net stack.
 723  * @IEEE80211_SDATA_DISCONNECT_RESUME: Disconnect after resume.
 724  * @IEEE80211_SDATA_IN_DRIVER: indicates interface was added to driver
 725  */
 726 enum ieee80211_sub_if_data_flags {
 727         IEEE80211_SDATA_ALLMULTI                = BIT(0),
 728         IEEE80211_SDATA_OPERATING_GMODE         = BIT(2),
 729         IEEE80211_SDATA_DONT_BRIDGE_PACKETS     = BIT(3),
 730         IEEE80211_SDATA_DISCONNECT_RESUME       = BIT(4),
 731         IEEE80211_SDATA_IN_DRIVER               = BIT(5),
 732 };
 733
 734 /**
 735  * enum ieee80211_sdata_state_bits - virtual interface state bits
 736  * @SDATA_STATE_RUNNING: virtual interface is up & running; this
 737  *      mirrors netif_running() but is separate for interface type
 738  *      change handling while the interface is up
 739  * @SDATA_STATE_OFFCHANNEL: This interface is currently in offchannel
 740  *      mode, so queues are stopped
 741  * @SDATA_STATE_OFFCHANNEL_BEACON_STOPPED: Beaconing was stopped due
 742  *      to offchannel, reset when offchannel returns
 743  */
 744 enum ieee80211_sdata_state_bits {
 745         SDATA_STATE_RUNNING,
 746         SDATA_STATE_OFFCHANNEL,
 747         SDATA_STATE_OFFCHANNEL_BEACON_STOPPED,
 748 };
 749
 750 /**
 751  * enum ieee80211_chanctx_mode - channel context configuration mode
 752  *
 753  * @IEEE80211_CHANCTX_SHARED: channel context may be used by
 754  *      multiple interfaces
 755  * @IEEE80211_CHANCTX_EXCLUSIVE: channel context can be used
 756  *      only by a single interface. This can be used for example for
 757  *      non-fixed channel IBSS.
 758  */
 759 enum ieee80211_chanctx_mode {
 760         IEEE80211_CHANCTX_SHARED,
 761         IEEE80211_CHANCTX_EXCLUSIVE
 762 };
 763
 764 /**
 765  * enum ieee80211_chanctx_replace_state - channel context replacement state
 766  *
 767  * This is used for channel context in-place reservations that require channel
 768  * context switch/swap.
 769  *
 770  * @IEEE80211_CHANCTX_REPLACE_NONE: no replacement is taking place
 771  * @IEEE80211_CHANCTX_WILL_BE_REPLACED: this channel context will be replaced
 772  *      by a (not yet registered) channel context pointed by %replace_ctx.
 773  * @IEEE80211_CHANCTX_REPLACES_OTHER: this (not yet registered) channel context
 774  *      replaces an existing channel context pointed to by %replace_ctx.
 775  */
 776 enum ieee80211_chanctx_replace_state {
 777         IEEE80211_CHANCTX_REPLACE_NONE,
 778         IEEE80211_CHANCTX_WILL_BE_REPLACED,
 779         IEEE80211_CHANCTX_REPLACES_OTHER,
 780 };
 781
 782 struct ieee80211_chanctx {
 783         struct list_head list;
 784         struct rcu_head rcu_head;
 785
 786         struct list_head assigned_vifs;
 787         struct list_head reserved_vifs;
 788
 789         enum ieee80211_chanctx_replace_state replace_state;
 790         struct ieee80211_chanctx *replace_ctx;
 791
 792         enum ieee80211_chanctx_mode mode;
 793         bool driver_present;
 794
 795         struct ieee80211_chanctx_conf conf;
 796 };
 797
 798 struct mac80211_qos_map {
 799         struct cfg80211_qos_map qos_map;
 800         struct rcu_head rcu_head;
 801 };
 802
 803 enum txq_info_flags {
 804         IEEE80211_TXQ_STOP,
 805         IEEE80211_TXQ_AMPDU,
 806         IEEE80211_TXQ_NO_AMSDU,
 807 };
 808
 809 /**
 810  * struct txq_info - per tid queue
 811  *
 812  * @tin: contains packets split into multiple flows
 813  * @def_flow: used as a fallback flow when a packet destined to @tin hashes to
 814  *      a fq_flow which is already owned by a different tin
 815  * @def_cvars: codel vars for @def_flow
 816  */
 817 struct txq_info {
 818         struct fq_tin tin;
 819         struct fq_flow def_flow;
 820         struct codel_vars def_cvars;
 821         unsigned long flags;
 822
 823         /* keep last! */
 824         struct ieee80211_txq txq;
 825 };
 826
 827 struct ieee80211_sub_if_data {
 828         struct list_head list;
 829
 830         struct wireless_dev wdev;
 831
 832         /* keys */
 833         struct list_head key_list;
 834
 835         /* count for keys needing tailroom space allocation */
 836         int crypto_tx_tailroom_needed_cnt;
 837         int crypto_tx_tailroom_pending_dec;
 838         struct delayed_work dec_tailroom_needed_wk;
 839
 840         struct net_device *dev;
 841         struct ieee80211_local *local;
 842
 843         unsigned int flags;
 844
 845         unsigned long state;
 846
 847         char name[IFNAMSIZ];
 848
 849         /* Fragment table for host-based reassembly */
 850         struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
 851         unsigned int fragment_next;
 852
 853         /* TID bitmap for NoAck policy */
 854         u16 noack_map;
 855
 856         /* bit field of ACM bits (BIT(802.1D tag)) */
 857         u8 wmm_acm;
 858
 859         struct ieee80211_key __rcu *keys[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
 860         struct ieee80211_key __rcu *default_unicast_key;
 861         struct ieee80211_key __rcu *default_multicast_key;
 862         struct ieee80211_key __rcu *default_mgmt_key;
 863
 864         u16 sequence_number;
 865         __be16 control_port_protocol;
 866         bool control_port_no_encrypt;
 867         int encrypt_headroom;
 868
 869         atomic_t num_tx_queued;
 870         struct ieee80211_tx_queue_params tx_conf[IEEE80211_NUM_ACS];
 871         struct mac80211_qos_map __rcu *qos_map;
 872
 873         struct work_struct csa_finalize_work;
 874         bool csa_block_tx; /* write-protected by sdata_lock and local->mtx */
 875         struct cfg80211_chan_def csa_chandef;
 876
 877         struct list_head assigned_chanctx_list; /* protected by chanctx_mtx */
 878         struct list_head reserved_chanctx_list; /* protected by chanctx_mtx */
 879
 880         /* context reservation -- protected with chanctx_mtx */
 881         struct ieee80211_chanctx *reserved_chanctx;
 882         struct cfg80211_chan_def reserved_chandef;
 883         bool reserved_radar_required;
 884         bool reserved_ready;
 885
 886         /* used to reconfigure hardware SM PS */
 887         struct work_struct recalc_smps;
 888
 889         struct work_struct work;
 890         struct sk_buff_head skb_queue;
 891
 892         u8 needed_rx_chains;
 893         enum ieee80211_smps_mode smps_mode;
 894
 895         int user_power_level; /* in dBm */
 896         int ap_power_level; /* in dBm */
 897
 898         bool radar_required;
 899         struct delayed_work dfs_cac_timer_work;
 900
 901         /*
 902          * AP this belongs to: self in AP mode and
 903          * corresponding AP in VLAN mode, NULL for
 904          * all others (might be needed later in IBSS)
 905          */
 906         struct ieee80211_if_ap *bss;
 907
 908         /* bitmap of allowed (non-MCS) rate indexes for rate control */
 909         u32 rc_rateidx_mask[NUM_NL80211_BANDS];
 910
 911         bool rc_has_mcs_mask[NUM_NL80211_BANDS];
 912         u8  rc_rateidx_mcs_mask[NUM_NL80211_BANDS][IEEE80211_HT_MCS_MASK_LEN];
 913
 914         bool rc_has_vht_mcs_mask[NUM_NL80211_BANDS];
 915         u16 rc_rateidx_vht_mcs_mask[NUM_NL80211_BANDS][NL80211_VHT_NSS_MAX];
 916
 917         union {
 918                 struct ieee80211_if_ap ap;
 919                 struct ieee80211_if_wds wds;
 920                 struct ieee80211_if_vlan vlan;
 921                 struct ieee80211_if_managed mgd;
 922                 struct ieee80211_if_ibss ibss;
 923                 struct ieee80211_if_mesh mesh;
 924                 struct ieee80211_if_ocb ocb;
 925                 u32 mntr_flags;
 926         } u;
 927
 928 #ifdef CONFIG_MAC80211_DEBUGFS
 929         struct {
 930                 struct dentry *subdir_stations;
 931                 struct dentry *default_unicast_key;
 932                 struct dentry *default_multicast_key;
 933                 struct dentry *default_mgmt_key;
 934         } debugfs;
 935 #endif
 936
 937         /* must be last, dynamically sized area in this! */
 938         struct ieee80211_vif vif;
 939 };
 940
 941 static inline
 942 struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
 943 {
 944         return container_of(p, struct ieee80211_sub_if_data, vif);
 945 }
 946
 947 static inline void sdata_lock(struct ieee80211_sub_if_data *sdata)
 948         __acquires(&sdata->wdev.mtx)
 949 {
 950         mutex_lock(&sdata->wdev.mtx);
 951         __acquire(&sdata->wdev.mtx);
 952 }
 953
 954 static inline void sdata_unlock(struct ieee80211_sub_if_data *sdata)
 955         __releases(&sdata->wdev.mtx)
 956 {
 957         mutex_unlock(&sdata->wdev.mtx);
 958         __release(&sdata->wdev.mtx);
 959 }
 960
 961 #define sdata_dereference(p, sdata) \
 962         rcu_dereference_protected(p, lockdep_is_held(&sdata->wdev.mtx))
 963
 964 static inline void
 965 sdata_assert_lock(struct ieee80211_sub_if_data *sdata)
 966 {
 967         lockdep_assert_held(&sdata->wdev.mtx);
 968 }
 969
 970 static inline enum nl80211_band
 971 ieee80211_get_sdata_band(struct ieee80211_sub_if_data *sdata)
 972 {
 973         enum nl80211_band band = NL80211_BAND_2GHZ;
 974         struct ieee80211_chanctx_conf *chanctx_conf;
 975
 976         rcu_read_lock();
 977         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
 978         if (!WARN_ON(!chanctx_conf))
 979                 band = chanctx_conf->def.chan->band;
 980         rcu_read_unlock();
 981
 982         return band;
 983 }
 984
 985 static inline int
 986 ieee80211_chandef_get_shift(struct cfg80211_chan_def *chandef)
 987 {
 988         switch (chandef->width) {
 989         case NL80211_CHAN_WIDTH_5:
 990                 return 2;
 991         case NL80211_CHAN_WIDTH_10:
 992                 return 1;
 993         default:
 994                 return 0;
 995         }
 996 }
 997
 998 static inline int
 999 ieee80211_vif_get_shift(struct ieee80211_vif *vif)
1000 {
1001         struct ieee80211_chanctx_conf *chanctx_conf;
1002         int shift = 0;
1003
1004         rcu_read_lock();
1005         chanctx_conf = rcu_dereference(vif->chanctx_conf);
1006         if (chanctx_conf)
1007                 shift = ieee80211_chandef_get_shift(&chanctx_conf->def);
1008         rcu_read_unlock();
1009
1010         return shift;
1011 }
1012
1013 struct ieee80211_rx_agg {
1014         u8 addr[ETH_ALEN];
1015         u16 tid;
1016 };
1017
1018 enum sdata_queue_type {
1019         IEEE80211_SDATA_QUEUE_TYPE_FRAME        = 0,
1020         IEEE80211_SDATA_QUEUE_AGG_START         = 1,
1021         IEEE80211_SDATA_QUEUE_AGG_STOP          = 2,
1022         IEEE80211_SDATA_QUEUE_RX_AGG_START      = 3,
1023         IEEE80211_SDATA_QUEUE_RX_AGG_STOP       = 4,
1024 };
1025
1026 enum {
1027         IEEE80211_RX_MSG        = 1,
1028         IEEE80211_TX_STATUS_MSG = 2,
1029 };
1030
1031 enum queue_stop_reason {
1032         IEEE80211_QUEUE_STOP_REASON_DRIVER,
1033         IEEE80211_QUEUE_STOP_REASON_PS,
1034         IEEE80211_QUEUE_STOP_REASON_CSA,
1035         IEEE80211_QUEUE_STOP_REASON_AGGREGATION,
1036         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
1037         IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
1038         IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL,
1039         IEEE80211_QUEUE_STOP_REASON_FLUSH,
1040         IEEE80211_QUEUE_STOP_REASON_TDLS_TEARDOWN,
1041         IEEE80211_QUEUE_STOP_REASON_RESERVE_TID,
1042
1043         IEEE80211_QUEUE_STOP_REASONS,
1044 };
1045
1046 #ifdef CONFIG_MAC80211_LEDS
1047 struct tpt_led_trigger {
1048         char name[32];
1049         const struct ieee80211_tpt_blink *blink_table;
1050         unsigned int blink_table_len;
1051         struct timer_list timer;
1052         unsigned long prev_traffic;
1053         unsigned long tx_bytes, rx_bytes;
1054         unsigned int active, want;
1055         bool running;
1056 };
1057 #endif
1058
1059 /**
1060  * mac80211 scan flags - currently active scan mode
1061  *
1062  * @SCAN_SW_SCANNING: We're currently in the process of scanning but may as
1063  *      well be on the operating channel
1064  * @SCAN_HW_SCANNING: The hardware is scanning for us, we have no way to
1065  *      determine if we are on the operating channel or not
1066  * @SCAN_ONCHANNEL_SCANNING:  Do a software scan on only the current operating
1067  *      channel. This should not interrupt normal traffic.
1068  * @SCAN_COMPLETED: Set for our scan work function when the driver reported
1069  *      that the scan completed.
1070  * @SCAN_ABORTED: Set for our scan work function when the driver reported
1071  *      a scan complete for an aborted scan.
1072  * @SCAN_HW_CANCELLED: Set for our scan work function when the scan is being
1073  *      cancelled.
1074  */
1075 enum {
1076         SCAN_SW_SCANNING,
1077         SCAN_HW_SCANNING,
1078         SCAN_ONCHANNEL_SCANNING,
1079         SCAN_COMPLETED,
1080         SCAN_ABORTED,
1081         SCAN_HW_CANCELLED,
1082 };
1083
1084 /**
1085  * enum mac80211_scan_state - scan state machine states
1086  *
1087  * @SCAN_DECISION: Main entry point to the scan state machine, this state
1088  *      determines if we should keep on scanning or switch back to the
1089  *      operating channel
1090  * @SCAN_SET_CHANNEL: Set the next channel to be scanned
1091  * @SCAN_SEND_PROBE: Send probe requests and wait for probe responses
1092  * @SCAN_SUSPEND: Suspend the scan and go back to operating channel to
1093  *      send out data
1094  * @SCAN_RESUME: Resume the scan and scan the next channel
1095  * @SCAN_ABORT: Abort the scan and go back to operating channel
1096  */
1097 enum mac80211_scan_state {
1098         SCAN_DECISION,
1099         SCAN_SET_CHANNEL,
1100         SCAN_SEND_PROBE,
1101         SCAN_SUSPEND,
1102         SCAN_RESUME,
1103         SCAN_ABORT,
1104 };
1105
1106 struct ieee80211_local {
1107         /* embed the driver visible part.
1108          * don't cast (use the static inlines below), but we keep
1109          * it first anyway so they become a no-op */
1110         struct ieee80211_hw hw;
1111
1112         struct fq fq;
1113         struct codel_vars *cvars;
1114         struct codel_params cparams;
1115         struct codel_stats cstats;
1116
1117         const struct ieee80211_ops *ops;
1118
1119         /*
1120          * private workqueue to mac80211. mac80211 makes this accessible
1121          * via ieee80211_queue_work()
1122          */
1123         struct workqueue_struct *workqueue;
1124
1125         unsigned long queue_stop_reasons[IEEE80211_MAX_QUEUES];
1126         int q_stop_reasons[IEEE80211_MAX_QUEUES][IEEE80211_QUEUE_STOP_REASONS];
1127         /* also used to protect ampdu_ac_queue and amdpu_ac_stop_refcnt */
1128         spinlock_t queue_stop_reason_lock;
1129
1130         int open_count;
1131         int monitors, cooked_mntrs;
1132         /* number of interfaces with corresponding FIF_ flags */
1133         int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss, fif_pspoll,
1134             fif_probe_req;
1135         int probe_req_reg;
1136         unsigned int filter_flags; /* FIF_* */
1137
1138         bool wiphy_ciphers_allocated;
1139
1140         bool use_chanctx;
1141
1142         /* protects the aggregated multicast list and filter calls */
1143         spinlock_t filter_lock;
1144
1145         /* used for uploading changed mc list */
1146         struct work_struct reconfig_filter;
1147
1148         /* aggregated multicast list */
1149         struct netdev_hw_addr_list mc_list;
1150
1151         bool tim_in_locked_section; /* see ieee80211_beacon_get() */
1152
1153         /*
1154          * suspended is true if we finished all the suspend _and_ we have
1155          * not yet come up from resume. This is to be used by mac80211
1156          * to ensure driver sanity during suspend and mac80211's own
1157          * sanity. It can eventually be used for WoW as well.
1158          */
1159         bool suspended;
1160
1161         /*
1162          * Resuming is true while suspended, but when we're reprogramming the
1163          * hardware -- at that time it's allowed to use ieee80211_queue_work()
1164          * again even though some other parts of the stack are still suspended
1165          * and we still drop received frames to avoid waking the stack.
1166          */
1167         bool resuming;
1168
1169         /*
1170          * quiescing is true during the suspend process _only_ to
1171          * ease timer cancelling etc.
1172          */
1173         bool quiescing;
1174
1175         /* device is started */
1176         bool started;
1177
1178         /* device is during a HW reconfig */
1179         bool in_reconfig;
1180
1181         /* wowlan is enabled -- don't reconfig on resume */
1182         bool wowlan;
1183
1184         struct work_struct radar_detected_work;
1185
1186         /* number of RX chains the hardware has */
1187         u8 rx_chains;
1188
1189         int tx_headroom; /* required headroom for hardware/radiotap */
1190
1191         /* Tasklet and skb queue to process calls from IRQ mode. All frames
1192          * added to skb_queue will be processed, but frames in
1193          * skb_queue_unreliable may be dropped if the total length of these
1194          * queues increases over the limit. */
1195 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
1196         struct tasklet_struct tasklet;
1197         struct sk_buff_head skb_queue;
1198         struct sk_buff_head skb_queue_unreliable;
1199
1200         spinlock_t rx_path_lock;
1201
1202         /* Station data */
1203         /*
1204          * The mutex only protects the list, hash table and
1205          * counter, reads are done with RCU.
1206          */
1207         struct mutex sta_mtx;
1208         spinlock_t tim_lock;
1209         unsigned long num_sta;
1210         struct list_head sta_list;
1211         struct rhashtable sta_hash;
1212         struct timer_list sta_cleanup;
1213         int sta_generation;
1214
1215         struct sk_buff_head pending[IEEE80211_MAX_QUEUES];
1216         struct tasklet_struct tx_pending_tasklet;
1217
1218         atomic_t agg_queue_stop[IEEE80211_MAX_QUEUES];
1219
1220         /* number of interfaces with allmulti RX */
1221         atomic_t iff_allmultis;
1222
1223         struct rate_control_ref *rate_ctrl;
1224
1225         struct crypto_cipher *wep_tx_tfm;
1226         struct crypto_cipher *wep_rx_tfm;
1227         u32 wep_iv;
1228
1229         /* see iface.c */
1230         struct list_head interfaces;
1231         struct mutex iflist_mtx;
1232
1233         /*
1234          * Key mutex, protects sdata's key_list and sta_info's
1235          * key pointers (write access, they're RCU.)
1236          */
1237         struct mutex key_mtx;
1238
1239         /* mutex for scan and work locking */
1240         struct mutex mtx;
1241
1242         /* Scanning and BSS list */
1243         unsigned long scanning;
1244         struct cfg80211_ssid scan_ssid;
1245         struct cfg80211_scan_request *int_scan_req;
1246         struct cfg80211_scan_request __rcu *scan_req;
1247         struct ieee80211_scan_request *hw_scan_req;
1248         struct cfg80211_chan_def scan_chandef;
1249         enum nl80211_band hw_scan_band;
1250         int scan_channel_idx;
1251         int scan_ies_len;
1252         int hw_scan_ies_bufsize;
1253         struct cfg80211_scan_info scan_info;
1254
1255         struct work_struct sched_scan_stopped_work;
1256         struct ieee80211_sub_if_data __rcu *sched_scan_sdata;
1257         struct cfg80211_sched_scan_request __rcu *sched_scan_req;
1258         u8 scan_addr[ETH_ALEN];
1259
1260         unsigned long leave_oper_channel_time;
1261         enum mac80211_scan_state next_scan_state;
1262         struct delayed_work scan_work;
1263         struct ieee80211_sub_if_data __rcu *scan_sdata;
1264         /* For backward compatibility only -- do not use */
1265         struct cfg80211_chan_def _oper_chandef;
1266
1267         /* Temporary remain-on-channel for off-channel operations */
1268         struct ieee80211_channel *tmp_channel;
1269
1270         /* channel contexts */
1271         struct list_head chanctx_list;
1272         struct mutex chanctx_mtx;
1273
1274 #ifdef CONFIG_MAC80211_LEDS
1275         struct led_trigger tx_led, rx_led, assoc_led, radio_led;
1276         struct led_trigger tpt_led;
1277         atomic_t tx_led_active, rx_led_active, assoc_led_active;
1278         atomic_t radio_led_active, tpt_led_active;
1279         struct tpt_led_trigger *tpt_led_trigger;
1280 #endif
1281
1282 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
1283         /* SNMP counters */
1284         /* dot11CountersTable */
1285         u32 dot11TransmittedFragmentCount;
1286         u32 dot11MulticastTransmittedFrameCount;
1287         u32 dot11FailedCount;
1288         u32 dot11RetryCount;
1289         u32 dot11MultipleRetryCount;
1290         u32 dot11FrameDuplicateCount;
1291         u32 dot11ReceivedFragmentCount;
1292         u32 dot11MulticastReceivedFrameCount;
1293         u32 dot11TransmittedFrameCount;
1294
1295         /* TX/RX handler statistics */
1296         unsigned int tx_handlers_drop;
1297         unsigned int tx_handlers_queued;
1298         unsigned int tx_handlers_drop_wep;
1299         unsigned int tx_handlers_drop_not_assoc;
1300         unsigned int tx_handlers_drop_unauth_port;
1301         unsigned int rx_handlers_drop;
1302         unsigned int rx_handlers_queued;
1303         unsigned int rx_handlers_drop_nullfunc;
1304         unsigned int rx_handlers_drop_defrag;
1305         unsigned int tx_expand_skb_head;
1306         unsigned int tx_expand_skb_head_cloned;
1307         unsigned int rx_expand_skb_head_defrag;
1308         unsigned int rx_handlers_fragments;
1309         unsigned int tx_status_drop;
1310 #define I802_DEBUG_INC(c) (c)++
1311 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
1312 #define I802_DEBUG_INC(c) do { } while (0)
1313 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
1314
1315
1316         int total_ps_buffered; /* total number of all buffered unicast and
1317                                 * multicast packets for power saving stations
1318                                 */
1319
1320         bool pspolling;
1321         bool offchannel_ps_enabled;
1322         /*
1323          * PS can only be enabled when we have exactly one managed
1324          * interface (and monitors) in PS, this then points there.
1325          */
1326         struct ieee80211_sub_if_data *ps_sdata;
1327         struct work_struct dynamic_ps_enable_work;
1328         struct work_struct dynamic_ps_disable_work;
1329         struct timer_list dynamic_ps_timer;
1330         struct notifier_block ifa_notifier;
1331         struct notifier_block ifa6_notifier;
1332
1333         /*
1334          * The dynamic ps timeout configured from user space via WEXT -
1335          * this will override whatever chosen by mac80211 internally.
1336          */
1337         int dynamic_ps_forced_timeout;
1338
1339         int user_power_level; /* in dBm, for all interfaces */
1340
1341         enum ieee80211_smps_mode smps_mode;
1342
1343         struct work_struct restart_work;
1344
1345 #ifdef CONFIG_MAC80211_DEBUGFS
1346         struct local_debugfsdentries {
1347                 struct dentry *rcdir;
1348                 struct dentry *keys;
1349         } debugfs;
1350 #endif
1351
1352         /*
1353          * Remain-on-channel support
1354          */
1355         struct delayed_work roc_work;
1356         struct list_head roc_list;
1357         struct work_struct hw_roc_start, hw_roc_done;
1358         unsigned long hw_roc_start_time;
1359         u64 roc_cookie_counter;
1360
1361         struct idr ack_status_frames;
1362         spinlock_t ack_status_lock;
1363
1364         struct ieee80211_sub_if_data __rcu *p2p_sdata;
1365
1366         /* virtual monitor interface */
1367         struct ieee80211_sub_if_data __rcu *monitor_sdata;
1368         struct cfg80211_chan_def monitor_chandef;
1369
1370         /* extended capabilities provided by mac80211 */
1371         u8 ext_capa[8];
1372
1373         /* TDLS channel switch */
1374         struct work_struct tdls_chsw_work;
1375         struct sk_buff_head skb_queue_tdls_chsw;
1376 };
1377
1378 static inline struct ieee80211_sub_if_data *
1379 IEEE80211_DEV_TO_SUB_IF(struct net_device *dev)
1380 {
1381         return netdev_priv(dev);
1382 }
1383
1384 static inline struct ieee80211_sub_if_data *
1385 IEEE80211_WDEV_TO_SUB_IF(struct wireless_dev *wdev)
1386 {
1387         return container_of(wdev, struct ieee80211_sub_if_data, wdev);
1388 }
1389
1390 /* this struct represents 802.11n's RA/TID combination */
1391 struct ieee80211_ra_tid {
1392         u8 ra[ETH_ALEN];
1393         u16 tid;
1394 };
1395
1396 /* this struct holds the value parsing from channel switch IE  */
1397 struct ieee80211_csa_ie {
1398         struct cfg80211_chan_def chandef;
1399         u8 mode;
1400         u8 count;
1401         u8 ttl;
1402         u16 pre_value;
1403 };
1404
1405 /* Parsed Information Elements */
1406 struct ieee802_11_elems {
1407         const u8 *ie_start;
1408         size_t total_len;
1409
1410         /* pointers to IEs */
1411         const struct ieee80211_tdls_lnkie *lnk_id;
1412         const struct ieee80211_ch_switch_timing *ch_sw_timing;
1413         const u8 *ext_capab;
1414         const u8 *ssid;
1415         const u8 *supp_rates;
1416         const u8 *ds_params;
1417         const struct ieee80211_tim_ie *tim;
1418         const u8 *challenge;
1419         const u8 *rsn;
1420         const u8 *erp_info;
1421         const u8 *ext_supp_rates;
1422         const u8 *wmm_info;
1423         const u8 *wmm_param;
1424         const struct ieee80211_ht_cap *ht_cap_elem;
1425         const struct ieee80211_ht_operation *ht_operation;
1426         const struct ieee80211_vht_cap *vht_cap_elem;
1427         const struct ieee80211_vht_operation *vht_operation;
1428         const struct ieee80211_meshconf_ie *mesh_config;
1429         const u8 *mesh_id;
1430         const u8 *peering;
1431         const __le16 *awake_window;
1432         const u8 *preq;
1433         const u8 *prep;
1434         const u8 *perr;
1435         const struct ieee80211_rann_ie *rann;
1436         const struct ieee80211_channel_sw_ie *ch_switch_ie;
1437         const struct ieee80211_ext_chansw_ie *ext_chansw_ie;
1438         const struct ieee80211_wide_bw_chansw_ie *wide_bw_chansw_ie;
1439         const u8 *country_elem;
1440         const u8 *pwr_constr_elem;
1441         const u8 *cisco_dtpc_elem;
1442         const struct ieee80211_timeout_interval_ie *timeout_int;
1443         const u8 *opmode_notif;
1444         const struct ieee80211_sec_chan_offs_ie *sec_chan_offs;
1445         const struct ieee80211_mesh_chansw_params_ie *mesh_chansw_params_ie;
1446
1447         /* length of them, respectively */
1448         u8 ext_capab_len;
1449         u8 ssid_len;
1450         u8 supp_rates_len;
1451         u8 tim_len;
1452         u8 challenge_len;
1453         u8 rsn_len;
1454         u8 ext_supp_rates_len;
1455         u8 wmm_info_len;
1456         u8 wmm_param_len;
1457         u8 mesh_id_len;
1458         u8 peering_len;
1459         u8 preq_len;
1460         u8 prep_len;
1461         u8 perr_len;
1462         u8 country_elem_len;
1463
1464         /* whether a parse error occurred while retrieving these elements */
1465         bool parse_error;
1466 };
1467
1468 static inline struct ieee80211_local *hw_to_local(
1469         struct ieee80211_hw *hw)
1470 {
1471         return container_of(hw, struct ieee80211_local, hw);
1472 }
1473
1474 static inline struct txq_info *to_txq_info(struct ieee80211_txq *txq)
1475 {
1476         return container_of(txq, struct txq_info, txq);
1477 }
1478
1479 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
1480 {
1481         return ether_addr_equal(raddr, addr) ||
1482                is_broadcast_ether_addr(raddr);
1483 }
1484
1485 static inline bool
1486 ieee80211_have_rx_timestamp(struct ieee80211_rx_status *status)
1487 {
1488         WARN_ON_ONCE(status->flag & RX_FLAG_MACTIME_START &&
1489                      status->flag & RX_FLAG_MACTIME_END);
1490         if (status->flag & (RX_FLAG_MACTIME_START | RX_FLAG_MACTIME_END))
1491                 return true;
1492         /* can't handle HT/VHT preamble yet */
1493         if (status->flag & RX_FLAG_MACTIME_PLCP_START &&
1494             !(status->flag & (RX_FLAG_HT | RX_FLAG_VHT)))
1495                 return true;
1496         return false;
1497 }
1498
1499 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
1500                                      struct ieee80211_rx_status *status,
1501                                      unsigned int mpdu_len,
1502                                      unsigned int mpdu_offset);
1503 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed);
1504 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx);
1505 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
1506                                       u32 changed);
1507 void ieee80211_configure_filter(struct ieee80211_local *local);
1508 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata);
1509
1510 u64 ieee80211_mgmt_tx_cookie(struct ieee80211_local *local);
1511 int ieee80211_attach_ack_skb(struct ieee80211_local *local, struct sk_buff *skb,
1512                              u64 *cookie, gfp_t gfp);
1513
1514 void ieee80211_check_fast_rx(struct sta_info *sta);
1515 void __ieee80211_check_fast_rx_iface(struct ieee80211_sub_if_data *sdata);
1516 void ieee80211_check_fast_rx_iface(struct ieee80211_sub_if_data *sdata);
1517 void ieee80211_clear_fast_rx(struct sta_info *sta);
1518
1519 /* STA code */
1520 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata);
1521 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
1522                        struct cfg80211_auth_request *req);
1523 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
1524                         struct cfg80211_assoc_request *req);
1525 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
1526                          struct cfg80211_deauth_request *req);
1527 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
1528                            struct cfg80211_disassoc_request *req);
1529 void ieee80211_send_pspoll(struct ieee80211_local *local,
1530                            struct ieee80211_sub_if_data *sdata);
1531 void ieee80211_recalc_ps(struct ieee80211_local *local);
1532 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata);
1533 int ieee80211_set_arp_filter(struct ieee80211_sub_if_data *sdata);
1534 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata);
1535 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1536                                   struct sk_buff *skb);
1537 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata);
1538 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata);
1539 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata);
1540 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
1541                                   __le16 fc, bool acked);
1542 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata);
1543 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata);
1544 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata);
1545
1546 /* IBSS code */
1547 void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local);
1548 void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata);
1549 void ieee80211_ibss_rx_no_sta(struct ieee80211_sub_if_data *sdata,
1550                               const u8 *bssid, const u8 *addr, u32 supp_rates);
1551 int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,
1552                         struct cfg80211_ibss_params *params);
1553 int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata);
1554 void ieee80211_ibss_work(struct ieee80211_sub_if_data *sdata);
1555 void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1556                                    struct sk_buff *skb);
1557 int ieee80211_ibss_csa_beacon(struct ieee80211_sub_if_data *sdata,
1558                               struct cfg80211_csa_settings *csa_settings);
1559 int ieee80211_ibss_finish_csa(struct ieee80211_sub_if_data *sdata);
1560 void ieee80211_ibss_stop(struct ieee80211_sub_if_data *sdata);
1561
1562 /* OCB code */
1563 void ieee80211_ocb_work(struct ieee80211_sub_if_data *sdata);
1564 void ieee80211_ocb_rx_no_sta(struct ieee80211_sub_if_data *sdata,
1565                              const u8 *bssid, const u8 *addr, u32 supp_rates);
1566 void ieee80211_ocb_setup_sdata(struct ieee80211_sub_if_data *sdata);
1567 int ieee80211_ocb_join(struct ieee80211_sub_if_data *sdata,
1568                        struct ocb_setup *setup);
1569 int ieee80211_ocb_leave(struct ieee80211_sub_if_data *sdata);
1570
1571 /* mesh code */
1572 void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata);
1573 void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1574                                    struct sk_buff *skb);
1575 int ieee80211_mesh_csa_beacon(struct ieee80211_sub_if_data *sdata,
1576                               struct cfg80211_csa_settings *csa_settings);
1577 int ieee80211_mesh_finish_csa(struct ieee80211_sub_if_data *sdata);
1578
1579 /* scan/BSS handling */
1580 void ieee80211_scan_work(struct work_struct *work);
1581 int ieee80211_request_ibss_scan(struct ieee80211_sub_if_data *sdata,
1582                                 const u8 *ssid, u8 ssid_len,
1583                                 struct ieee80211_channel **channels,
1584                                 unsigned int n_channels,
1585                                 enum nl80211_bss_scan_width scan_width);
1586 int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata,
1587                            struct cfg80211_scan_request *req);
1588 void ieee80211_scan_cancel(struct ieee80211_local *local);
1589 void ieee80211_run_deferred_scan(struct ieee80211_local *local);
1590 void ieee80211_scan_rx(struct ieee80211_local *local, struct sk_buff *skb);
1591
1592 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local);
1593 struct ieee80211_bss *
1594 ieee80211_bss_info_update(struct ieee80211_local *local,
1595                           struct ieee80211_rx_status *rx_status,
1596                           struct ieee80211_mgmt *mgmt,
1597                           size_t len,
1598                           struct ieee802_11_elems *elems,
1599                           struct ieee80211_channel *channel);
1600 void ieee80211_rx_bss_put(struct ieee80211_local *local,
1601                           struct ieee80211_bss *bss);
1602
1603 /* scheduled scan handling */
1604 int
1605 __ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata,
1606                                      struct cfg80211_sched_scan_request *req);
1607 int ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata,
1608                                        struct cfg80211_sched_scan_request *req);
1609 int ieee80211_request_sched_scan_stop(struct ieee80211_local *local);
1610 void ieee80211_sched_scan_end(struct ieee80211_local *local);
1611 void ieee80211_sched_scan_stopped_work(struct work_struct *work);
1612
1613 /* off-channel/mgmt-tx */
1614 void ieee80211_offchannel_stop_vifs(struct ieee80211_local *local);
1615 void ieee80211_offchannel_return(struct ieee80211_local *local);
1616 void ieee80211_roc_setup(struct ieee80211_local *local);
1617 void ieee80211_start_next_roc(struct ieee80211_local *local);
1618 void ieee80211_roc_purge(struct ieee80211_local *local,
1619                          struct ieee80211_sub_if_data *sdata);
1620 int ieee80211_remain_on_channel(struct wiphy *wiphy, struct wireless_dev *wdev,
1621                                 struct ieee80211_channel *chan,
1622                                 unsigned int duration, u64 *cookie);
1623 int ieee80211_cancel_remain_on_channel(struct wiphy *wiphy,
1624                                        struct wireless_dev *wdev, u64 cookie);
1625 int ieee80211_mgmt_tx(struct wiphy *wiphy, struct wireless_dev *wdev,
1626                       struct cfg80211_mgmt_tx_params *params, u64 *cookie);
1627 int ieee80211_mgmt_tx_cancel_wait(struct wiphy *wiphy,
1628                                   struct wireless_dev *wdev, u64 cookie);
1629
1630 /* channel switch handling */
1631 void ieee80211_csa_finalize_work(struct work_struct *work);
1632 int ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev,
1633                              struct cfg80211_csa_settings *params);
1634
1635 /* interface handling */
1636 int ieee80211_iface_init(void);
1637 void ieee80211_iface_exit(void);
1638 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1639                      unsigned char name_assign_type,
1640                      struct wireless_dev **new_wdev, enum nl80211_iftype type,
1641                      struct vif_params *params);
1642 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1643                              enum nl80211_iftype type);
1644 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata);
1645 void ieee80211_remove_interfaces(struct ieee80211_local *local);
1646 u32 ieee80211_idle_off(struct ieee80211_local *local);
1647 void ieee80211_recalc_idle(struct ieee80211_local *local);
1648 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
1649                                     const int offset);
1650 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up);
1651 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata);
1652 int ieee80211_add_virtual_monitor(struct ieee80211_local *local);
1653 void ieee80211_del_virtual_monitor(struct ieee80211_local *local);
1654
1655 bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata);
1656 void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata,
1657                               bool update_bss);
1658
1659 static inline bool ieee80211_sdata_running(struct ieee80211_sub_if_data *sdata)
1660 {
1661         return test_bit(SDATA_STATE_RUNNING, &sdata->state);
1662 }
1663
1664 /* tx handling */
1665 void ieee80211_clear_tx_pending(struct ieee80211_local *local);
1666 void ieee80211_tx_pending(unsigned long data);
1667 netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
1668                                          struct net_device *dev);
1669 netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
1670                                        struct net_device *dev);
1671 void __ieee80211_subif_start_xmit(struct sk_buff *skb,
1672                                   struct net_device *dev,
1673                                   u32 info_flags);
1674 void ieee80211_purge_tx_queue(struct ieee80211_hw *hw,
1675                               struct sk_buff_head *skbs);
1676 struct sk_buff *
1677 ieee80211_build_data_template(struct ieee80211_sub_if_data *sdata,
1678                               struct sk_buff *skb, u32 info_flags);
1679 void ieee80211_tx_monitor(struct ieee80211_local *local, struct sk_buff *skb,
1680                           struct ieee80211_supported_band *sband,
1681                           int retry_count, int shift, bool send_to_cooked);
1682
1683 void ieee80211_check_fast_xmit(struct sta_info *sta);
1684 void ieee80211_check_fast_xmit_all(struct ieee80211_local *local);
1685 void ieee80211_check_fast_xmit_iface(struct ieee80211_sub_if_data *sdata);
1686 void ieee80211_clear_fast_xmit(struct sta_info *sta);
1687
1688 /* HT */
1689 void ieee80211_apply_htcap_overrides(struct ieee80211_sub_if_data *sdata,
1690                                      struct ieee80211_sta_ht_cap *ht_cap);
1691 bool ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_sub_if_data *sdata,
1692                                        struct ieee80211_supported_band *sband,
1693                                        const struct ieee80211_ht_cap *ht_cap_ie,
1694                                        struct sta_info *sta);
1695 void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
1696                           const u8 *da, u16 tid,
1697                           u16 initiator, u16 reason_code);
1698 int ieee80211_send_smps_action(struct ieee80211_sub_if_data *sdata,
1699                                enum ieee80211_smps_mode smps, const u8 *da,
1700                                const u8 *bssid);
1701 void ieee80211_request_smps_ap_work(struct work_struct *work);
1702 void ieee80211_request_smps_mgd_work(struct work_struct *work);
1703 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
1704                                    enum ieee80211_smps_mode smps_mode_new);
1705
1706 void ___ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
1707                                      u16 initiator, u16 reason, bool stop);
1708 void __ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
1709                                     u16 initiator, u16 reason, bool stop);
1710 void __ieee80211_start_rx_ba_session(struct sta_info *sta,
1711                                      u8 dialog_token, u16 timeout,
1712                                      u16 start_seq_num, u16 ba_policy, u16 tid,
1713                                      u16 buf_size, bool tx, bool auto_seq);
1714 void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta,
1715                                          enum ieee80211_agg_stop_reason reason);
1716 void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
1717                              struct sta_info *sta,
1718                              struct ieee80211_mgmt *mgmt, size_t len);
1719 void ieee80211_process_addba_resp(struct ieee80211_local *local,
1720                                   struct sta_info *sta,
1721                                   struct ieee80211_mgmt *mgmt,
1722                                   size_t len);
1723 void ieee80211_process_addba_request(struct ieee80211_local *local,
1724                                      struct sta_info *sta,
1725                                      struct ieee80211_mgmt *mgmt,
1726                                      size_t len);
1727
1728 int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1729                                    enum ieee80211_agg_stop_reason reason);
1730 int ___ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1731                                     enum ieee80211_agg_stop_reason reason);
1732 void ieee80211_start_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u16 tid);
1733 void ieee80211_stop_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u8 tid);
1734 void ieee80211_ba_session_work(struct work_struct *work);
1735 void ieee80211_tx_ba_session_handle_start(struct sta_info *sta, int tid);
1736 void ieee80211_release_reorder_timeout(struct sta_info *sta, int tid);
1737
1738 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs);
1739
1740 /* VHT */
1741 void
1742 ieee80211_vht_cap_ie_to_sta_vht_cap(struct ieee80211_sub_if_data *sdata,
1743                                     struct ieee80211_supported_band *sband,
1744                                     const struct ieee80211_vht_cap *vht_cap_ie,
1745                                     struct sta_info *sta);
1746 enum ieee80211_sta_rx_bandwidth ieee80211_sta_cap_rx_bw(struct sta_info *sta);
1747 enum ieee80211_sta_rx_bandwidth ieee80211_sta_cur_vht_bw(struct sta_info *sta);
1748 void ieee80211_sta_set_rx_nss(struct sta_info *sta);
1749 enum ieee80211_sta_rx_bandwidth
1750 ieee80211_chan_width_to_rx_bw(enum nl80211_chan_width width);
1751 enum nl80211_chan_width ieee80211_sta_cap_chan_bw(struct sta_info *sta);
1752 void ieee80211_sta_set_rx_nss(struct sta_info *sta);
1753 void ieee80211_process_mu_groups(struct ieee80211_sub_if_data *sdata,
1754                                  struct ieee80211_mgmt *mgmt);
1755 u32 __ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
1756                                   struct sta_info *sta, u8 opmode,
1757                                   enum nl80211_band band);
1758 void ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
1759                                  struct sta_info *sta, u8 opmode,
1760                                  enum nl80211_band band);
1761 void ieee80211_apply_vhtcap_overrides(struct ieee80211_sub_if_data *sdata,
1762                                       struct ieee80211_sta_vht_cap *vht_cap);
1763 void ieee80211_get_vht_mask_from_cap(__le16 vht_cap,
1764                                      u16 vht_mask[NL80211_VHT_NSS_MAX]);
1765
1766 /* Spectrum management */
1767 void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata,
1768                                        struct ieee80211_mgmt *mgmt,
1769                                        size_t len);
1770 /**
1771  * ieee80211_parse_ch_switch_ie - parses channel switch IEs
1772  * @sdata: the sdata of the interface which has received the frame
1773  * @elems: parsed 802.11 elements received with the frame
1774  * @current_band: indicates the current band
1775  * @sta_flags: contains information about own capabilities and restrictions
1776  *      to decide which channel switch announcements can be accepted. Only the
1777  *      following subset of &enum ieee80211_sta_flags are evaluated:
1778  *      %IEEE80211_STA_DISABLE_HT, %IEEE80211_STA_DISABLE_VHT,
1779  *      %IEEE80211_STA_DISABLE_40MHZ, %IEEE80211_STA_DISABLE_80P80MHZ,
1780  *      %IEEE80211_STA_DISABLE_160MHZ.
1781  * @bssid: the currently connected bssid (for reporting)
1782  * @csa_ie: parsed 802.11 csa elements on count, mode, chandef and mesh ttl.
1783         All of them will be filled with if success only.
1784  * Return: 0 on success, <0 on error and >0 if there is nothing to parse.
1785  */
1786 int ieee80211_parse_ch_switch_ie(struct ieee80211_sub_if_data *sdata,
1787                                  struct ieee802_11_elems *elems,
1788                                  enum nl80211_band current_band,
1789                                  u32 sta_flags, u8 *bssid,
1790                                  struct ieee80211_csa_ie *csa_ie);
1791
1792 /* Suspend/resume and hw reconfiguration */
1793 int ieee80211_reconfig(struct ieee80211_local *local);
1794 void ieee80211_stop_device(struct ieee80211_local *local);
1795
1796 int __ieee80211_suspend(struct ieee80211_hw *hw,
1797                         struct cfg80211_wowlan *wowlan);
1798
1799 static inline int __ieee80211_resume(struct ieee80211_hw *hw)
1800 {
1801         struct ieee80211_local *local = hw_to_local(hw);
1802
1803         WARN(test_bit(SCAN_HW_SCANNING, &local->scanning) &&
1804              !test_bit(SCAN_COMPLETED, &local->scanning),
1805                 "%s: resume with hardware scan still in progress\n",
1806                 wiphy_name(hw->wiphy));
1807
1808         return ieee80211_reconfig(hw_to_local(hw));
1809 }
1810
1811 /* utility functions/constants */
1812 extern const void *const mac80211_wiphy_privid; /* for wiphy privid */
1813 int ieee80211_frame_duration(enum nl80211_band band, size_t len,
1814                              int rate, int erp, int short_preamble,
1815                              int shift);
1816 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1817                                bool bss_notify, bool enable_qos);
1818 void ieee80211_xmit(struct ieee80211_sub_if_data *sdata,
1819                     struct sta_info *sta, struct sk_buff *skb);
1820
1821 void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
1822                                  struct sk_buff *skb, int tid,
1823                                  enum nl80211_band band);
1824
1825 static inline void
1826 ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
1827                           struct sk_buff *skb, int tid,
1828                           enum nl80211_band band)
1829 {
1830         rcu_read_lock();
1831         __ieee80211_tx_skb_tid_band(sdata, skb, tid, band);
1832         rcu_read_unlock();
1833 }
1834
1835 static inline void ieee80211_tx_skb_tid(struct ieee80211_sub_if_data *sdata,
1836                                         struct sk_buff *skb, int tid)
1837 {
1838         struct ieee80211_chanctx_conf *chanctx_conf;
1839
1840         rcu_read_lock();
1841         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1842         if (WARN_ON(!chanctx_conf)) {
1843                 rcu_read_unlock();
1844                 kfree_skb(skb);
1845                 return;
1846         }
1847
1848         __ieee80211_tx_skb_tid_band(sdata, skb, tid,
1849                                     chanctx_conf->def.chan->band);
1850         rcu_read_unlock();
1851 }
1852
1853 static inline void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata,
1854                                     struct sk_buff *skb)
1855 {
1856         /* Send all internal mgmt frames on VO. Accordingly set TID to 7. */
1857         ieee80211_tx_skb_tid(sdata, skb, 7);
1858 }
1859
1860 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
1861                                struct ieee802_11_elems *elems,
1862                                u64 filter, u32 crc);
1863 static inline void ieee802_11_parse_elems(const u8 *start, size_t len,
1864                                           bool action,
1865                                           struct ieee802_11_elems *elems)
1866 {
1867         ieee802_11_parse_elems_crc(start, len, action, elems, 0, 0);
1868 }
1869
1870
1871 extern const int ieee802_1d_to_ac[8];
1872
1873 static inline int ieee80211_ac_from_tid(int tid)
1874 {
1875         return ieee802_1d_to_ac[tid & 7];
1876 }
1877
1878 void ieee80211_dynamic_ps_enable_work(struct work_struct *work);
1879 void ieee80211_dynamic_ps_disable_work(struct work_struct *work);
1880 void ieee80211_dynamic_ps_timer(unsigned long data);
1881 void ieee80211_send_nullfunc(struct ieee80211_local *local,
1882                              struct ieee80211_sub_if_data *sdata,
1883                              bool powersave);
1884 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1885                              struct ieee80211_hdr *hdr);
1886 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1887                              struct ieee80211_hdr *hdr, bool ack, u16 tx_time);
1888
1889 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
1890                                      unsigned long queues,
1891                                      enum queue_stop_reason reason,
1892                                      bool refcounted);
1893 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
1894                                struct ieee80211_sub_if_data *sdata,
1895                                enum queue_stop_reason reason);
1896 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
1897                                struct ieee80211_sub_if_data *sdata,
1898                                enum queue_stop_reason reason);
1899 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
1900                                      unsigned long queues,
1901                                      enum queue_stop_reason reason,
1902                                      bool refcounted);
1903 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
1904                                     enum queue_stop_reason reason,
1905                                     bool refcounted);
1906 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
1907                                     enum queue_stop_reason reason,
1908                                     bool refcounted);
1909 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue);
1910 void ieee80211_add_pending_skb(struct ieee80211_local *local,
1911                                struct sk_buff *skb);
1912 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
1913                                 struct sk_buff_head *skbs);
1914 void ieee80211_flush_queues(struct ieee80211_local *local,
1915                             struct ieee80211_sub_if_data *sdata, bool drop);
1916 void __ieee80211_flush_queues(struct ieee80211_local *local,
1917                               struct ieee80211_sub_if_data *sdata,
1918                               unsigned int queues, bool drop);
1919
1920 static inline bool ieee80211_can_run_worker(struct ieee80211_local *local)
1921 {
1922         /*
1923          * If quiescing is set, we are racing with __ieee80211_suspend.
1924          * __ieee80211_suspend flushes the workers after setting quiescing,
1925          * and we check quiescing / suspended before enqueing new workers.
1926          * We should abort the worker to avoid the races below.
1927          */
1928         if (local->quiescing)
1929                 return false;
1930
1931         /*
1932          * We might already be suspended if the following scenario occurs:
1933          * __ieee80211_suspend          Control path
1934          *
1935          *                              if (local->quiescing)
1936          *                                      return;
1937          * local->quiescing = true;
1938          * flush_workqueue();
1939          *                              queue_work(...);
1940          * local->suspended = true;
1941          * local->quiescing = false;
1942          *                              worker starts running...
1943          */
1944         if (local->suspended)
1945                 return false;
1946
1947         return true;
1948 }
1949
1950 int ieee80211_txq_setup_flows(struct ieee80211_local *local);
1951 void ieee80211_txq_teardown_flows(struct ieee80211_local *local);
1952 void ieee80211_txq_init(struct ieee80211_sub_if_data *sdata,
1953                         struct sta_info *sta,
1954                         struct txq_info *txq, int tid);
1955 void ieee80211_txq_purge(struct ieee80211_local *local,
1956                          struct txq_info *txqi);
1957 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1958                          u16 transaction, u16 auth_alg, u16 status,
1959                          const u8 *extra, size_t extra_len, const u8 *bssid,
1960                          const u8 *da, const u8 *key, u8 key_len, u8 key_idx,
1961                          u32 tx_flags);
1962 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1963                                     const u8 *bssid, u16 stype, u16 reason,
1964                                     bool send_frame, u8 *frame_buf);
1965 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1966                              size_t buffer_len,
1967                              struct ieee80211_scan_ies *ie_desc,
1968                              const u8 *ie, size_t ie_len,
1969                              u8 bands_used, u32 *rate_masks,
1970                              struct cfg80211_chan_def *chandef);
1971 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1972                                           const u8 *src, const u8 *dst,
1973                                           u32 ratemask,
1974                                           struct ieee80211_channel *chan,
1975                                           const u8 *ssid, size_t ssid_len,
1976                                           const u8 *ie, size_t ie_len,
1977                                           bool directed);
1978 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata,
1979                               const u8 *src, const u8 *dst,
1980                               const u8 *ssid, size_t ssid_len,
1981                               const u8 *ie, size_t ie_len,
1982                               u32 ratemask, bool directed, u32 tx_flags,
1983                               struct ieee80211_channel *channel, bool scan);
1984
1985 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1986                             struct ieee802_11_elems *elems,
1987                             enum nl80211_band band, u32 *basic_rates);
1988 int __ieee80211_request_smps_mgd(struct ieee80211_sub_if_data *sdata,
1989                                  enum ieee80211_smps_mode smps_mode);
1990 int __ieee80211_request_smps_ap(struct ieee80211_sub_if_data *sdata,
1991                                 enum ieee80211_smps_mode smps_mode);
1992 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata);
1993 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata);
1994
1995 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset);
1996 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
1997                               u16 cap);
1998 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
1999                                const struct cfg80211_chan_def *chandef,
2000                                u16 prot_mode, bool rifs_mode);
2001 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2002                                u32 cap);
2003 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2004                                 const struct cfg80211_chan_def *chandef);
2005 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2006                              const struct ieee80211_supported_band *sband,
2007                              const u8 *srates, int srates_len, u32 *rates);
2008 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2009                             struct sk_buff *skb, bool need_basic,
2010                             enum nl80211_band band);
2011 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2012                                 struct sk_buff *skb, bool need_basic,
2013                                 enum nl80211_band band);
2014 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo);
2015
2016 /* channel management */
2017 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
2018                                struct cfg80211_chan_def *chandef);
2019 bool ieee80211_chandef_vht_oper(const struct ieee80211_vht_operation *oper,
2020                                 struct cfg80211_chan_def *chandef);
2021 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c);
2022
2023 int __must_check
2024 ieee80211_vif_use_channel(struct ieee80211_sub_if_data *sdata,
2025                           const struct cfg80211_chan_def *chandef,
2026                           enum ieee80211_chanctx_mode mode);
2027 int __must_check
2028 ieee80211_vif_reserve_chanctx(struct ieee80211_sub_if_data *sdata,
2029                               const struct cfg80211_chan_def *chandef,
2030                               enum ieee80211_chanctx_mode mode,
2031                               bool radar_required);
2032 int __must_check
2033 ieee80211_vif_use_reserved_context(struct ieee80211_sub_if_data *sdata);
2034 int ieee80211_vif_unreserve_chanctx(struct ieee80211_sub_if_data *sdata);
2035
2036 int __must_check
2037 ieee80211_vif_change_bandwidth(struct ieee80211_sub_if_data *sdata,
2038                                const struct cfg80211_chan_def *chandef,
2039                                u32 *changed);
2040 void ieee80211_vif_release_channel(struct ieee80211_sub_if_data *sdata);
2041 void ieee80211_vif_vlan_copy_chanctx(struct ieee80211_sub_if_data *sdata);
2042 void ieee80211_vif_copy_chanctx_to_vlans(struct ieee80211_sub_if_data *sdata,
2043                                          bool clear);
2044 int ieee80211_chanctx_refcount(struct ieee80211_local *local,
2045                                struct ieee80211_chanctx *ctx);
2046
2047 void ieee80211_recalc_smps_chanctx(struct ieee80211_local *local,
2048                                    struct ieee80211_chanctx *chanctx);
2049 void ieee80211_recalc_chanctx_min_def(struct ieee80211_local *local,
2050                                       struct ieee80211_chanctx *ctx);
2051 bool ieee80211_is_radar_required(struct ieee80211_local *local);
2052
2053 void ieee80211_dfs_cac_timer(unsigned long data);
2054 void ieee80211_dfs_cac_timer_work(struct work_struct *work);
2055 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local);
2056 void ieee80211_dfs_radar_detected_work(struct work_struct *work);
2057 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2058                               struct cfg80211_csa_settings *csa_settings);
2059
2060 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs);
2061 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n);
2062 const struct ieee80211_cipher_scheme *
2063 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
2064                  enum nl80211_iftype iftype);
2065 int ieee80211_cs_headroom(struct ieee80211_local *local,
2066                           struct cfg80211_crypto_settings *crypto,
2067                           enum nl80211_iftype iftype);
2068 void ieee80211_recalc_dtim(struct ieee80211_local *local,
2069                            struct ieee80211_sub_if_data *sdata);
2070 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
2071                                  const struct cfg80211_chan_def *chandef,
2072                                  enum ieee80211_chanctx_mode chanmode,
2073                                  u8 radar_detect);
2074 int ieee80211_max_num_channels(struct ieee80211_local *local);
2075 enum nl80211_chan_width ieee80211_get_sta_bw(struct ieee80211_sta *sta);
2076 void ieee80211_recalc_chanctx_chantype(struct ieee80211_local *local,
2077                                        struct ieee80211_chanctx *ctx);
2078
2079 /* TDLS */
2080 int ieee80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev,
2081                         const u8 *peer, u8 action_code, u8 dialog_token,
2082                         u16 status_code, u32 peer_capability,
2083                         bool initiator, const u8 *extra_ies,
2084                         size_t extra_ies_len);
2085 int ieee80211_tdls_oper(struct wiphy *wiphy, struct net_device *dev,
2086                         const u8 *peer, enum nl80211_tdls_operation oper);
2087 void ieee80211_tdls_peer_del_work(struct work_struct *wk);
2088 int ieee80211_tdls_channel_switch(struct wiphy *wiphy, struct net_device *dev,
2089                                   const u8 *addr, u8 oper_class,
2090                                   struct cfg80211_chan_def *chandef);
2091 void ieee80211_tdls_cancel_channel_switch(struct wiphy *wiphy,
2092                                           struct net_device *dev,
2093                                           const u8 *addr);
2094 void ieee80211_teardown_tdls_peers(struct ieee80211_sub_if_data *sdata);
2095 void ieee80211_tdls_chsw_work(struct work_struct *wk);
2096
2097 extern const struct ethtool_ops ieee80211_ethtool_ops;
2098
2099 #ifdef CONFIG_MAC80211_NOINLINE
2100 #define debug_noinline noinline
2101 #else
2102 #define debug_noinline
2103 #endif
2104
2105 #endif /* IEEE80211_I_H */