1/* 2 * Copyright 2002-2005, Devicescape Software, Inc. 3 * Copyright 2013-2014 Intel Mobile Communications GmbH 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License version 2 as 7 * published by the Free Software Foundation. 8 */ 9 10#ifndef STA_INFO_H 11#define STA_INFO_H 12 13#include <linux/list.h> 14#include <linux/types.h> 15#include <linux/if_ether.h> 16#include <linux/workqueue.h> 17#include <linux/average.h> 18#include <linux/etherdevice.h> 19#include "key.h" 20 21/** 22 * enum ieee80211_sta_info_flags - Stations flags 23 * 24 * These flags are used with &struct sta_info's @flags member, but 25 * only indirectly with set_sta_flag() and friends. 26 * 27 * @WLAN_STA_AUTH: Station is authenticated. 28 * @WLAN_STA_ASSOC: Station is associated. 29 * @WLAN_STA_PS_STA: Station is in power-save mode 30 * @WLAN_STA_AUTHORIZED: Station is authorized to send/receive traffic. 31 * This bit is always checked so needs to be enabled for all stations 32 * when virtual port control is not in use. 33 * @WLAN_STA_SHORT_PREAMBLE: Station is capable of receiving short-preamble 34 * frames. 35 * @WLAN_STA_WDS: Station is one of our WDS peers. 36 * @WLAN_STA_CLEAR_PS_FILT: Clear PS filter in hardware (using the 37 * IEEE80211_TX_CTL_CLEAR_PS_FILT control flag) when the next 38 * frame to this station is transmitted. 39 * @WLAN_STA_MFP: Management frame protection is used with this STA. 40 * @WLAN_STA_BLOCK_BA: Used to deny ADDBA requests (both TX and RX) 41 * during suspend/resume and station removal. 42 * @WLAN_STA_PS_DRIVER: driver requires keeping this station in 43 * power-save mode logically to flush frames that might still 44 * be in the queues 45 * @WLAN_STA_PSPOLL: Station sent PS-poll while driver was keeping 46 * station in power-save mode, reply when the driver unblocks. 47 * @WLAN_STA_TDLS_PEER: Station is a TDLS peer. 48 * @WLAN_STA_TDLS_PEER_AUTH: This TDLS peer is authorized to send direct 49 * packets. This means the link is enabled. 50 * @WLAN_STA_TDLS_INITIATOR: We are the initiator of the TDLS link with this 51 * station. 52 * @WLAN_STA_UAPSD: Station requested unscheduled SP while driver was 53 * keeping station in power-save mode, reply when the driver 54 * unblocks the station. 55 * @WLAN_STA_SP: Station is in a service period, so don't try to 56 * reply to other uAPSD trigger frames or PS-Poll. 57 * @WLAN_STA_4ADDR_EVENT: 4-addr event was already sent for this frame. 58 * @WLAN_STA_INSERTED: This station is inserted into the hash table. 59 * @WLAN_STA_RATE_CONTROL: rate control was initialized for this station. 60 * @WLAN_STA_TOFFSET_KNOWN: toffset calculated for this station is valid. 61 * @WLAN_STA_MPSP_OWNER: local STA is owner of a mesh Peer Service Period. 62 * @WLAN_STA_MPSP_RECIPIENT: local STA is recipient of a MPSP. 63 * @WLAN_STA_PS_DELIVER: station woke up, but we're still blocking TX 64 * until pending frames are delivered 65 */ 66enum ieee80211_sta_info_flags { 67 WLAN_STA_AUTH, 68 WLAN_STA_ASSOC, 69 WLAN_STA_PS_STA, 70 WLAN_STA_AUTHORIZED, 71 WLAN_STA_SHORT_PREAMBLE, 72 WLAN_STA_WDS, 73 WLAN_STA_CLEAR_PS_FILT, 74 WLAN_STA_MFP, 75 WLAN_STA_BLOCK_BA, 76 WLAN_STA_PS_DRIVER, 77 WLAN_STA_PSPOLL, 78 WLAN_STA_TDLS_PEER, 79 WLAN_STA_TDLS_PEER_AUTH, 80 WLAN_STA_TDLS_INITIATOR, 81 WLAN_STA_UAPSD, 82 WLAN_STA_SP, 83 WLAN_STA_4ADDR_EVENT, 84 WLAN_STA_INSERTED, 85 WLAN_STA_RATE_CONTROL, 86 WLAN_STA_TOFFSET_KNOWN, 87 WLAN_STA_MPSP_OWNER, 88 WLAN_STA_MPSP_RECIPIENT, 89 WLAN_STA_PS_DELIVER, 90}; 91 92#define ADDBA_RESP_INTERVAL HZ 93#define HT_AGG_MAX_RETRIES 15 94#define HT_AGG_BURST_RETRIES 3 95#define HT_AGG_RETRIES_PERIOD (15 * HZ) 96 97#define HT_AGG_STATE_DRV_READY 0 98#define HT_AGG_STATE_RESPONSE_RECEIVED 1 99#define HT_AGG_STATE_OPERATIONAL 2 100#define HT_AGG_STATE_STOPPING 3 101#define HT_AGG_STATE_WANT_START 4 102#define HT_AGG_STATE_WANT_STOP 5 103 104enum ieee80211_agg_stop_reason { 105 AGG_STOP_DECLINED, 106 AGG_STOP_LOCAL_REQUEST, 107 AGG_STOP_PEER_REQUEST, 108 AGG_STOP_DESTROY_STA, 109}; 110 111/** 112 * struct tid_ampdu_tx - TID aggregation information (Tx). 113 * 114 * @rcu_head: rcu head for freeing structure 115 * @session_timer: check if we keep Tx-ing on the TID (by timeout value) 116 * @addba_resp_timer: timer for peer's response to addba request 117 * @pending: pending frames queue -- use sta's spinlock to protect 118 * @dialog_token: dialog token for aggregation session 119 * @timeout: session timeout value to be filled in ADDBA requests 120 * @state: session state (see above) 121 * @last_tx: jiffies of last tx activity 122 * @stop_initiator: initiator of a session stop 123 * @tx_stop: TX DelBA frame when stopping 124 * @buf_size: reorder buffer size at receiver 125 * @failed_bar_ssn: ssn of the last failed BAR tx attempt 126 * @bar_pending: BAR needs to be re-sent 127 * 128 * This structure's lifetime is managed by RCU, assignments to 129 * the array holding it must hold the aggregation mutex. 130 * 131 * The TX path can access it under RCU lock-free if, and 132 * only if, the state has the flag %HT_AGG_STATE_OPERATIONAL 133 * set. Otherwise, the TX path must also acquire the spinlock 134 * and re-check the state, see comments in the tx code 135 * touching it. 136 */ 137struct tid_ampdu_tx { 138 struct rcu_head rcu_head; 139 struct timer_list session_timer; 140 struct timer_list addba_resp_timer; 141 struct sk_buff_head pending; 142 unsigned long state; 143 unsigned long last_tx; 144 u16 timeout; 145 u8 dialog_token; 146 u8 stop_initiator; 147 bool tx_stop; 148 u8 buf_size; 149 150 u16 failed_bar_ssn; 151 bool bar_pending; 152}; 153 154/** 155 * struct tid_ampdu_rx - TID aggregation information (Rx). 156 * 157 * @reorder_buf: buffer to reorder incoming aggregated MPDUs. An MPDU may be an 158 * A-MSDU with individually reported subframes. 159 * @reorder_time: jiffies when skb was added 160 * @session_timer: check if peer keeps Tx-ing on the TID (by timeout value) 161 * @reorder_timer: releases expired frames from the reorder buffer. 162 * @last_rx: jiffies of last rx activity 163 * @head_seq_num: head sequence number in reordering buffer. 164 * @stored_mpdu_num: number of MPDUs in reordering buffer 165 * @ssn: Starting Sequence Number expected to be aggregated. 166 * @buf_size: buffer size for incoming A-MPDUs 167 * @timeout: reset timer value (in TUs). 168 * @dialog_token: dialog token for aggregation session 169 * @rcu_head: RCU head used for freeing this struct 170 * @reorder_lock: serializes access to reorder buffer, see below. 171 * @auto_seq: used for offloaded BA sessions to automatically pick head_seq_and 172 * and ssn. 173 * 174 * This structure's lifetime is managed by RCU, assignments to 175 * the array holding it must hold the aggregation mutex. 176 * 177 * The @reorder_lock is used to protect the members of this 178 * struct, except for @timeout, @buf_size and @dialog_token, 179 * which are constant across the lifetime of the struct (the 180 * dialog token being used only for debugging). 181 */ 182struct tid_ampdu_rx { 183 struct rcu_head rcu_head; 184 spinlock_t reorder_lock; 185 struct sk_buff_head *reorder_buf; 186 unsigned long *reorder_time; 187 struct timer_list session_timer; 188 struct timer_list reorder_timer; 189 unsigned long last_rx; 190 u16 head_seq_num; 191 u16 stored_mpdu_num; 192 u16 ssn; 193 u16 buf_size; 194 u16 timeout; 195 u8 dialog_token; 196 bool auto_seq; 197}; 198 199/** 200 * struct sta_ampdu_mlme - STA aggregation information. 201 * 202 * @tid_rx: aggregation info for Rx per TID -- RCU protected 203 * @tid_tx: aggregation info for Tx per TID 204 * @tid_start_tx: sessions where start was requested 205 * @addba_req_num: number of times addBA request has been sent. 206 * @last_addba_req_time: timestamp of the last addBA request. 207 * @dialog_token_allocator: dialog token enumerator for each new session; 208 * @work: work struct for starting/stopping aggregation 209 * @tid_rx_timer_expired: bitmap indicating on which TIDs the 210 * RX timer expired until the work for it runs 211 * @tid_rx_stop_requested: bitmap indicating which BA sessions per TID the 212 * driver requested to close until the work for it runs 213 * @mtx: mutex to protect all TX data (except non-NULL assignments 214 * to tid_tx[idx], which are protected by the sta spinlock) 215 * tid_start_tx is also protected by sta->lock. 216 */ 217struct sta_ampdu_mlme { 218 struct mutex mtx; 219 /* rx */ 220 struct tid_ampdu_rx __rcu *tid_rx[IEEE80211_NUM_TIDS]; 221 unsigned long tid_rx_timer_expired[BITS_TO_LONGS(IEEE80211_NUM_TIDS)]; 222 unsigned long tid_rx_stop_requested[BITS_TO_LONGS(IEEE80211_NUM_TIDS)]; 223 /* tx */ 224 struct work_struct work; 225 struct tid_ampdu_tx __rcu *tid_tx[IEEE80211_NUM_TIDS]; 226 struct tid_ampdu_tx *tid_start_tx[IEEE80211_NUM_TIDS]; 227 unsigned long last_addba_req_time[IEEE80211_NUM_TIDS]; 228 u8 addba_req_num[IEEE80211_NUM_TIDS]; 229 u8 dialog_token_allocator; 230}; 231 232/* 233 * struct ieee80211_tx_latency_stat - Tx latency statistics 234 * 235 * Measures TX latency and jitter for a station per TID. 236 * 237 * @max: worst case latency 238 * @sum: sum of all latencies 239 * @counter: amount of Tx frames sent from interface 240 * @bins: each bin counts how many frames transmitted within a certain 241 * latency range. when disabled it is NULL. 242 * @bin_count: amount of bins. 243 */ 244struct ieee80211_tx_latency_stat { 245 u32 max; 246 u32 sum; 247 u32 counter; 248 u32 *bins; 249 u32 bin_count; 250}; 251 252/** 253 * struct sta_info - STA information 254 * 255 * This structure collects information about a station that 256 * mac80211 is communicating with. 257 * 258 * @list: global linked list entry 259 * @free_list: list entry for keeping track of stations to free 260 * @hnext: hash table linked list pointer 261 * @local: pointer to the global information 262 * @sdata: virtual interface this station belongs to 263 * @ptk: peer keys negotiated with this station, if any 264 * @ptk_idx: last installed peer key index 265 * @gtk: group keys negotiated with this station, if any 266 * @gtk_idx: last installed group key index 267 * @rate_ctrl: rate control algorithm reference 268 * @rate_ctrl_priv: rate control private per-STA pointer 269 * @last_tx_rate: rate used for last transmit, to report to userspace as 270 * "the" transmit rate 271 * @last_rx_rate_idx: rx status rate index of the last data packet 272 * @last_rx_rate_flag: rx status flag of the last data packet 273 * @last_rx_rate_vht_flag: rx status vht flag of the last data packet 274 * @last_rx_rate_vht_nss: rx status nss of last data packet 275 * @lock: used for locking all fields that require locking, see comments 276 * in the header file. 277 * @drv_deliver_wk: used for delivering frames after driver PS unblocking 278 * @listen_interval: listen interval of this station, when we're acting as AP 279 * @_flags: STA flags, see &enum ieee80211_sta_info_flags, do not use directly 280 * @ps_lock: used for powersave (when mac80211 is the AP) related locking 281 * @ps_tx_buf: buffers (per AC) of frames to transmit to this station 282 * when it leaves power saving state or polls 283 * @tx_filtered: buffers (per AC) of frames we already tried to 284 * transmit but were filtered by hardware due to STA having 285 * entered power saving state, these are also delivered to 286 * the station when it leaves powersave or polls for frames 287 * @driver_buffered_tids: bitmap of TIDs the driver has data buffered on 288 * @rx_packets: Number of MSDUs received from this STA 289 * @rx_bytes: Number of bytes received from this STA 290 * @last_rx: time (in jiffies) when last frame was received from this STA 291 * @last_connected: time (in seconds) when a station got connected 292 * @num_duplicates: number of duplicate frames received from this STA 293 * @rx_fragments: number of received MPDUs 294 * @rx_dropped: number of dropped MPDUs from this STA 295 * @last_signal: signal of last received frame from this STA 296 * @avg_signal: moving average of signal of received frames from this STA 297 * @last_ack_signal: signal of last received Ack frame from this STA 298 * @last_seq_ctrl: last received seq/frag number from this STA (per RX queue) 299 * @tx_filtered_count: number of frames the hardware filtered for this STA 300 * @tx_retry_failed: number of frames that failed retry 301 * @tx_retry_count: total number of retries for frames to this STA 302 * @fail_avg: moving percentage of failed MSDUs 303 * @tx_packets: number of RX/TX MSDUs 304 * @tx_bytes: number of bytes transmitted to this STA 305 * @tx_fragments: number of transmitted MPDUs 306 * @tid_seq: per-TID sequence numbers for sending to this STA 307 * @ampdu_mlme: A-MPDU state machine state 308 * @timer_to_tid: identity mapping to ID timers 309 * @tx_lat: Tx latency statistics 310 * @llid: Local link ID 311 * @plid: Peer link ID 312 * @reason: Cancel reason on PLINK_HOLDING state 313 * @plink_retries: Retries in establishment 314 * @plink_state: peer link state 315 * @plink_timeout: timeout of peer link 316 * @plink_timer: peer link watch timer 317 * @t_offset: timing offset relative to this host 318 * @t_offset_setpoint: reference timing offset of this sta to be used when 319 * calculating clockdrift 320 * @local_pm: local link-specific power save mode 321 * @peer_pm: peer-specific power save mode towards local STA 322 * @nonpeer_pm: STA power save mode towards non-peer neighbors 323 * @debugfs: debug filesystem info 324 * @dead: set to true when sta is unlinked 325 * @uploaded: set to true when sta is uploaded to the driver 326 * @lost_packets: number of consecutive lost packets 327 * @sta: station information we share with the driver 328 * @sta_state: duplicates information about station state (for debug) 329 * @beacon_loss_count: number of times beacon loss has triggered 330 * @rcu_head: RCU head used for freeing this station struct 331 * @cur_max_bandwidth: maximum bandwidth to use for TX to the station, 332 * taken from HT/VHT capabilities or VHT operating mode notification 333 * @chains: chains ever used for RX from this station 334 * @chain_signal_last: last signal (per chain) 335 * @chain_signal_avg: signal average (per chain) 336 * @known_smps_mode: the smps_mode the client thinks we are in. Relevant for 337 * AP only. 338 * @cipher_scheme: optional cipher scheme for this station 339 * @last_tdls_pkt_time: holds the time in jiffies of last TDLS pkt ACKed 340 */ 341struct sta_info { 342 /* General information, mostly static */ 343 struct list_head list, free_list; 344 struct rcu_head rcu_head; 345 struct sta_info __rcu *hnext; 346 struct ieee80211_local *local; 347 struct ieee80211_sub_if_data *sdata; 348 struct ieee80211_key __rcu *gtk[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS]; 349 struct ieee80211_key __rcu *ptk[NUM_DEFAULT_KEYS]; 350 u8 gtk_idx; 351 u8 ptk_idx; 352 struct rate_control_ref *rate_ctrl; 353 void *rate_ctrl_priv; 354 spinlock_t lock; 355 356 struct work_struct drv_deliver_wk; 357 358 u16 listen_interval; 359 360 bool dead; 361 362 bool uploaded; 363 364 enum ieee80211_sta_state sta_state; 365 366 /* use the accessors defined below */ 367 unsigned long _flags; 368 369 /* STA powersave lock and frame queues */ 370 spinlock_t ps_lock; 371 struct sk_buff_head ps_tx_buf[IEEE80211_NUM_ACS]; 372 struct sk_buff_head tx_filtered[IEEE80211_NUM_ACS]; 373 unsigned long driver_buffered_tids; 374 375 /* Updated from RX path only, no locking requirements */ 376 unsigned long rx_packets; 377 u64 rx_bytes; 378 unsigned long last_rx; 379 long last_connected; 380 unsigned long num_duplicates; 381 unsigned long rx_fragments; 382 unsigned long rx_dropped; 383 int last_signal; 384 struct ewma avg_signal; 385 int last_ack_signal; 386 387 u8 chains; 388 s8 chain_signal_last[IEEE80211_MAX_CHAINS]; 389 struct ewma chain_signal_avg[IEEE80211_MAX_CHAINS]; 390 391 /* Plus 1 for non-QoS frames */ 392 __le16 last_seq_ctrl[IEEE80211_NUM_TIDS + 1]; 393 394 /* Updated from TX status path only, no locking requirements */ 395 unsigned long tx_filtered_count; 396 unsigned long tx_retry_failed, tx_retry_count; 397 /* moving percentage of failed MSDUs */ 398 unsigned int fail_avg; 399 400 /* Updated from TX path only, no locking requirements */ 401 u32 tx_fragments; 402 u64 tx_packets[IEEE80211_NUM_ACS]; 403 u64 tx_bytes[IEEE80211_NUM_ACS]; 404 struct ieee80211_tx_rate last_tx_rate; 405 int last_rx_rate_idx; 406 u32 last_rx_rate_flag; 407 u32 last_rx_rate_vht_flag; 408 u8 last_rx_rate_vht_nss; 409 u16 tid_seq[IEEE80211_QOS_CTL_TID_MASK + 1]; 410 411 /* 412 * Aggregation information, locked with lock. 413 */ 414 struct sta_ampdu_mlme ampdu_mlme; 415 u8 timer_to_tid[IEEE80211_NUM_TIDS]; 416 417 struct ieee80211_tx_latency_stat *tx_lat; 418 419#ifdef CONFIG_MAC80211_MESH 420 /* 421 * Mesh peer link attributes 422 * TODO: move to a sub-structure that is referenced with pointer? 423 */ 424 u16 llid; 425 u16 plid; 426 u16 reason; 427 u8 plink_retries; 428 enum nl80211_plink_state plink_state; 429 u32 plink_timeout; 430 struct timer_list plink_timer; 431 s64 t_offset; 432 s64 t_offset_setpoint; 433 /* mesh power save */ 434 enum nl80211_mesh_power_mode local_pm; 435 enum nl80211_mesh_power_mode peer_pm; 436 enum nl80211_mesh_power_mode nonpeer_pm; 437#endif 438 439#ifdef CONFIG_MAC80211_DEBUGFS 440 struct sta_info_debugfsdentries { 441 struct dentry *dir; 442 bool add_has_run; 443 } debugfs; 444#endif 445 446 enum ieee80211_sta_rx_bandwidth cur_max_bandwidth; 447 448 unsigned int lost_packets; 449 unsigned int beacon_loss_count; 450 451 enum ieee80211_smps_mode known_smps_mode; 452 const struct ieee80211_cipher_scheme *cipher_scheme; 453 454 /* TDLS timeout data */ 455 unsigned long last_tdls_pkt_time; 456 457 /* keep last! */ 458 struct ieee80211_sta sta; 459}; 460 461static inline enum nl80211_plink_state sta_plink_state(struct sta_info *sta) 462{ 463#ifdef CONFIG_MAC80211_MESH 464 return sta->plink_state; 465#endif 466 return NL80211_PLINK_LISTEN; 467} 468 469static inline void set_sta_flag(struct sta_info *sta, 470 enum ieee80211_sta_info_flags flag) 471{ 472 WARN_ON(flag == WLAN_STA_AUTH || 473 flag == WLAN_STA_ASSOC || 474 flag == WLAN_STA_AUTHORIZED); 475 set_bit(flag, &sta->_flags); 476} 477 478static inline void clear_sta_flag(struct sta_info *sta, 479 enum ieee80211_sta_info_flags flag) 480{ 481 WARN_ON(flag == WLAN_STA_AUTH || 482 flag == WLAN_STA_ASSOC || 483 flag == WLAN_STA_AUTHORIZED); 484 clear_bit(flag, &sta->_flags); 485} 486 487static inline int test_sta_flag(struct sta_info *sta, 488 enum ieee80211_sta_info_flags flag) 489{ 490 return test_bit(flag, &sta->_flags); 491} 492 493static inline int test_and_clear_sta_flag(struct sta_info *sta, 494 enum ieee80211_sta_info_flags flag) 495{ 496 WARN_ON(flag == WLAN_STA_AUTH || 497 flag == WLAN_STA_ASSOC || 498 flag == WLAN_STA_AUTHORIZED); 499 return test_and_clear_bit(flag, &sta->_flags); 500} 501 502static inline int test_and_set_sta_flag(struct sta_info *sta, 503 enum ieee80211_sta_info_flags flag) 504{ 505 WARN_ON(flag == WLAN_STA_AUTH || 506 flag == WLAN_STA_ASSOC || 507 flag == WLAN_STA_AUTHORIZED); 508 return test_and_set_bit(flag, &sta->_flags); 509} 510 511int sta_info_move_state(struct sta_info *sta, 512 enum ieee80211_sta_state new_state); 513 514static inline void sta_info_pre_move_state(struct sta_info *sta, 515 enum ieee80211_sta_state new_state) 516{ 517 int ret; 518 519 WARN_ON_ONCE(test_sta_flag(sta, WLAN_STA_INSERTED)); 520 521 ret = sta_info_move_state(sta, new_state); 522 WARN_ON_ONCE(ret); 523} 524 525 526void ieee80211_assign_tid_tx(struct sta_info *sta, int tid, 527 struct tid_ampdu_tx *tid_tx); 528 529static inline struct tid_ampdu_tx * 530rcu_dereference_protected_tid_tx(struct sta_info *sta, int tid) 531{ 532 return rcu_dereference_protected(sta->ampdu_mlme.tid_tx[tid], 533 lockdep_is_held(&sta->lock) || 534 lockdep_is_held(&sta->ampdu_mlme.mtx)); 535} 536 537#define STA_HASH_SIZE 256 538#define STA_HASH(sta) (sta[5]) 539 540 541/* Maximum number of frames to buffer per power saving station per AC */ 542#define STA_MAX_TX_BUFFER 64 543 544/* Minimum buffered frame expiry time. If STA uses listen interval that is 545 * smaller than this value, the minimum value here is used instead. */ 546#define STA_TX_BUFFER_EXPIRE (10 * HZ) 547 548/* How often station data is cleaned up (e.g., expiration of buffered frames) 549 */ 550#define STA_INFO_CLEANUP_INTERVAL (10 * HZ) 551 552/* 553 * Get a STA info, must be under RCU read lock. 554 */ 555struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata, 556 const u8 *addr); 557 558struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata, 559 const u8 *addr); 560 561static inline 562void for_each_sta_info_type_check(struct ieee80211_local *local, 563 const u8 *addr, 564 struct sta_info *sta, 565 struct sta_info *nxt) 566{ 567} 568 569#define for_each_sta_info(local, _addr, _sta, nxt) \ 570 for ( /* initialise loop */ \ 571 _sta = rcu_dereference(local->sta_hash[STA_HASH(_addr)]),\ 572 nxt = _sta ? rcu_dereference(_sta->hnext) : NULL; \ 573 /* typecheck */ \ 574 for_each_sta_info_type_check(local, (_addr), _sta, nxt),\ 575 /* continue condition */ \ 576 _sta; \ 577 /* advance loop */ \ 578 _sta = nxt, \ 579 nxt = _sta ? rcu_dereference(_sta->hnext) : NULL \ 580 ) \ 581 /* compare address and run code only if it matches */ \ 582 if (ether_addr_equal(_sta->sta.addr, (_addr))) 583 584/* 585 * Get STA info by index, BROKEN! 586 */ 587struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata, 588 int idx); 589/* 590 * Create a new STA info, caller owns returned structure 591 * until sta_info_insert(). 592 */ 593struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata, 594 const u8 *addr, gfp_t gfp); 595 596void sta_info_free(struct ieee80211_local *local, struct sta_info *sta); 597 598/* 599 * Insert STA info into hash table/list, returns zero or a 600 * -EEXIST if (if the same MAC address is already present). 601 * 602 * Calling the non-rcu version makes the caller relinquish, 603 * the _rcu version calls read_lock_rcu() and must be called 604 * without it held. 605 */ 606int sta_info_insert(struct sta_info *sta); 607int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU); 608 609int __must_check __sta_info_destroy(struct sta_info *sta); 610int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, 611 const u8 *addr); 612int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata, 613 const u8 *addr); 614 615void sta_info_recalc_tim(struct sta_info *sta); 616 617void sta_info_init(struct ieee80211_local *local); 618void sta_info_stop(struct ieee80211_local *local); 619 620/** 621 * sta_info_flush - flush matching STA entries from the STA table 622 * 623 * Returns the number of removed STA entries. 624 * 625 * @sdata: sdata to remove all stations from 626 * @vlans: if the given interface is an AP interface, also flush VLANs 627 */ 628int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans); 629 630static inline int sta_info_flush(struct ieee80211_sub_if_data *sdata) 631{ 632 return __sta_info_flush(sdata, false); 633} 634 635void sta_set_rate_info_tx(struct sta_info *sta, 636 const struct ieee80211_tx_rate *rate, 637 struct rate_info *rinfo); 638void sta_set_rate_info_rx(struct sta_info *sta, 639 struct rate_info *rinfo); 640void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo); 641 642void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, 643 unsigned long exp_time); 644u8 sta_info_tx_streams(struct sta_info *sta); 645 646void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta); 647void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta); 648void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta); 649 650#endif /* STA_INFO_H */ 651