1 /* 2 * Copyright 2002-2005, Devicescape Software, Inc. 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License version 2 as 6 * published by the Free Software Foundation. 7 */ 8 9 #ifndef STA_INFO_H 10 #define STA_INFO_H 11 12 #include <linux/list.h> 13 #include <linux/types.h> 14 #include <linux/if_ether.h> 15 #include <linux/workqueue.h> 16 #include <linux/average.h> 17 #include <linux/etherdevice.h> 18 #include "key.h" 19 20 /** 21 * enum ieee80211_sta_info_flags - Stations flags 22 * 23 * These flags are used with &struct sta_info's @flags member, but 24 * only indirectly with set_sta_flag() and friends. 25 * 26 * @WLAN_STA_AUTH: Station is authenticated. 27 * @WLAN_STA_ASSOC: Station is associated. 28 * @WLAN_STA_PS_STA: Station is in power-save mode 29 * @WLAN_STA_AUTHORIZED: Station is authorized to send/receive traffic. 30 * This bit is always checked so needs to be enabled for all stations 31 * when virtual port control is not in use. 32 * @WLAN_STA_SHORT_PREAMBLE: Station is capable of receiving short-preamble 33 * frames. 34 * @WLAN_STA_WME: Station is a QoS-STA. 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_UAPSD: Station requested unscheduled SP while driver was 51 * keeping station in power-save mode, reply when the driver 52 * unblocks the station. 53 * @WLAN_STA_SP: Station is in a service period, so don't try to 54 * reply to other uAPSD trigger frames or PS-Poll. 55 * @WLAN_STA_4ADDR_EVENT: 4-addr event was already sent for this frame. 56 * @WLAN_STA_INSERTED: This station is inserted into the hash table. 57 * @WLAN_STA_RATE_CONTROL: rate control was initialized for this station. 58 * @WLAN_STA_TOFFSET_KNOWN: toffset calculated for this station is valid. 59 * @WLAN_STA_MPSP_OWNER: local STA is owner of a mesh Peer Service Period. 60 * @WLAN_STA_MPSP_RECIPIENT: local STA is recipient of a MPSP. 61 */ 62 enum ieee80211_sta_info_flags { 63 WLAN_STA_AUTH, 64 WLAN_STA_ASSOC, 65 WLAN_STA_PS_STA, 66 WLAN_STA_AUTHORIZED, 67 WLAN_STA_SHORT_PREAMBLE, 68 WLAN_STA_WME, 69 WLAN_STA_WDS, 70 WLAN_STA_CLEAR_PS_FILT, 71 WLAN_STA_MFP, 72 WLAN_STA_BLOCK_BA, 73 WLAN_STA_PS_DRIVER, 74 WLAN_STA_PSPOLL, 75 WLAN_STA_TDLS_PEER, 76 WLAN_STA_TDLS_PEER_AUTH, 77 WLAN_STA_UAPSD, 78 WLAN_STA_SP, 79 WLAN_STA_4ADDR_EVENT, 80 WLAN_STA_INSERTED, 81 WLAN_STA_RATE_CONTROL, 82 WLAN_STA_TOFFSET_KNOWN, 83 WLAN_STA_MPSP_OWNER, 84 WLAN_STA_MPSP_RECIPIENT, 85 }; 86 87 #define ADDBA_RESP_INTERVAL HZ 88 #define HT_AGG_MAX_RETRIES 15 89 #define HT_AGG_BURST_RETRIES 3 90 #define HT_AGG_RETRIES_PERIOD (15 * HZ) 91 92 #define HT_AGG_STATE_DRV_READY 0 93 #define HT_AGG_STATE_RESPONSE_RECEIVED 1 94 #define HT_AGG_STATE_OPERATIONAL 2 95 #define HT_AGG_STATE_STOPPING 3 96 #define HT_AGG_STATE_WANT_START 4 97 #define HT_AGG_STATE_WANT_STOP 5 98 99 enum ieee80211_agg_stop_reason { 100 AGG_STOP_DECLINED, 101 AGG_STOP_LOCAL_REQUEST, 102 AGG_STOP_PEER_REQUEST, 103 AGG_STOP_DESTROY_STA, 104 }; 105 106 /** 107 * struct tid_ampdu_tx - TID aggregation information (Tx). 108 * 109 * @rcu_head: rcu head for freeing structure 110 * @session_timer: check if we keep Tx-ing on the TID (by timeout value) 111 * @addba_resp_timer: timer for peer's response to addba request 112 * @pending: pending frames queue -- use sta's spinlock to protect 113 * @dialog_token: dialog token for aggregation session 114 * @timeout: session timeout value to be filled in ADDBA requests 115 * @state: session state (see above) 116 * @last_tx: jiffies of last tx activity 117 * @stop_initiator: initiator of a session stop 118 * @tx_stop: TX DelBA frame when stopping 119 * @buf_size: reorder buffer size at receiver 120 * @failed_bar_ssn: ssn of the last failed BAR tx attempt 121 * @bar_pending: BAR needs to be re-sent 122 * 123 * This structure's lifetime is managed by RCU, assignments to 124 * the array holding it must hold the aggregation mutex. 125 * 126 * The TX path can access it under RCU lock-free if, and 127 * only if, the state has the flag %HT_AGG_STATE_OPERATIONAL 128 * set. Otherwise, the TX path must also acquire the spinlock 129 * and re-check the state, see comments in the tx code 130 * touching it. 131 */ 132 struct tid_ampdu_tx { 133 struct rcu_head rcu_head; 134 struct timer_list session_timer; 135 struct timer_list addba_resp_timer; 136 struct sk_buff_head pending; 137 unsigned long state; 138 unsigned long last_tx; 139 u16 timeout; 140 u8 dialog_token; 141 u8 stop_initiator; 142 bool tx_stop; 143 u8 buf_size; 144 145 u16 failed_bar_ssn; 146 bool bar_pending; 147 }; 148 149 /** 150 * struct tid_ampdu_rx - TID aggregation information (Rx). 151 * 152 * @reorder_buf: buffer to reorder incoming aggregated MPDUs 153 * @reorder_time: jiffies when skb was added 154 * @session_timer: check if peer keeps Tx-ing on the TID (by timeout value) 155 * @reorder_timer: releases expired frames from the reorder buffer. 156 * @last_rx: jiffies of last rx activity 157 * @head_seq_num: head sequence number in reordering buffer. 158 * @stored_mpdu_num: number of MPDUs in reordering buffer 159 * @ssn: Starting Sequence Number expected to be aggregated. 160 * @buf_size: buffer size for incoming A-MPDUs 161 * @timeout: reset timer value (in TUs). 162 * @dialog_token: dialog token for aggregation session 163 * @rcu_head: RCU head used for freeing this struct 164 * @reorder_lock: serializes access to reorder buffer, see below. 165 * 166 * This structure's lifetime is managed by RCU, assignments to 167 * the array holding it must hold the aggregation mutex. 168 * 169 * The @reorder_lock is used to protect the members of this 170 * struct, except for @timeout, @buf_size and @dialog_token, 171 * which are constant across the lifetime of the struct (the 172 * dialog token being used only for debugging). 173 */ 174 struct tid_ampdu_rx { 175 struct rcu_head rcu_head; 176 spinlock_t reorder_lock; 177 struct sk_buff **reorder_buf; 178 unsigned long *reorder_time; 179 struct timer_list session_timer; 180 struct timer_list reorder_timer; 181 unsigned long last_rx; 182 u16 head_seq_num; 183 u16 stored_mpdu_num; 184 u16 ssn; 185 u16 buf_size; 186 u16 timeout; 187 u8 dialog_token; 188 }; 189 190 /** 191 * struct sta_ampdu_mlme - STA aggregation information. 192 * 193 * @tid_rx: aggregation info for Rx per TID -- RCU protected 194 * @tid_tx: aggregation info for Tx per TID 195 * @tid_start_tx: sessions where start was requested 196 * @addba_req_num: number of times addBA request has been sent. 197 * @last_addba_req_time: timestamp of the last addBA request. 198 * @dialog_token_allocator: dialog token enumerator for each new session; 199 * @work: work struct for starting/stopping aggregation 200 * @tid_rx_timer_expired: bitmap indicating on which TIDs the 201 * RX timer expired until the work for it runs 202 * @tid_rx_stop_requested: bitmap indicating which BA sessions per TID the 203 * driver requested to close until the work for it runs 204 * @mtx: mutex to protect all TX data (except non-NULL assignments 205 * to tid_tx[idx], which are protected by the sta spinlock) 206 * tid_start_tx is also protected by sta->lock. 207 */ 208 struct sta_ampdu_mlme { 209 struct mutex mtx; 210 /* rx */ 211 struct tid_ampdu_rx __rcu *tid_rx[IEEE80211_NUM_TIDS]; 212 unsigned long tid_rx_timer_expired[BITS_TO_LONGS(IEEE80211_NUM_TIDS)]; 213 unsigned long tid_rx_stop_requested[BITS_TO_LONGS(IEEE80211_NUM_TIDS)]; 214 /* tx */ 215 struct work_struct work; 216 struct tid_ampdu_tx __rcu *tid_tx[IEEE80211_NUM_TIDS]; 217 struct tid_ampdu_tx *tid_start_tx[IEEE80211_NUM_TIDS]; 218 unsigned long last_addba_req_time[IEEE80211_NUM_TIDS]; 219 u8 addba_req_num[IEEE80211_NUM_TIDS]; 220 u8 dialog_token_allocator; 221 }; 222 223 224 /** 225 * struct sta_info - STA information 226 * 227 * This structure collects information about a station that 228 * mac80211 is communicating with. 229 * 230 * @list: global linked list entry 231 * @hnext: hash table linked list pointer 232 * @local: pointer to the global information 233 * @sdata: virtual interface this station belongs to 234 * @ptk: peer key negotiated with this station, if any 235 * @gtk: group keys negotiated with this station, if any 236 * @rate_ctrl: rate control algorithm reference 237 * @rate_ctrl_priv: rate control private per-STA pointer 238 * @last_tx_rate: rate used for last transmit, to report to userspace as 239 * "the" transmit rate 240 * @last_rx_rate_idx: rx status rate index of the last data packet 241 * @last_rx_rate_flag: rx status flag of the last data packet 242 * @last_rx_rate_vht_nss: rx status nss of last data packet 243 * @lock: used for locking all fields that require locking, see comments 244 * in the header file. 245 * @drv_unblock_wk: used for driver PS unblocking 246 * @listen_interval: listen interval of this station, when we're acting as AP 247 * @_flags: STA flags, see &enum ieee80211_sta_info_flags, do not use directly 248 * @ps_tx_buf: buffers (per AC) of frames to transmit to this station 249 * when it leaves power saving state or polls 250 * @tx_filtered: buffers (per AC) of frames we already tried to 251 * transmit but were filtered by hardware due to STA having 252 * entered power saving state, these are also delivered to 253 * the station when it leaves powersave or polls for frames 254 * @driver_buffered_tids: bitmap of TIDs the driver has data buffered on 255 * @rx_packets: Number of MSDUs received from this STA 256 * @rx_bytes: Number of bytes received from this STA 257 * @wep_weak_iv_count: number of weak WEP IVs received from this station 258 * @last_rx: time (in jiffies) when last frame was received from this STA 259 * @last_connected: time (in seconds) when a station got connected 260 * @num_duplicates: number of duplicate frames received from this STA 261 * @rx_fragments: number of received MPDUs 262 * @rx_dropped: number of dropped MPDUs from this STA 263 * @last_signal: signal of last received frame from this STA 264 * @avg_signal: moving average of signal of received frames from this STA 265 * @last_ack_signal: signal of last received Ack frame from this STA 266 * @last_seq_ctrl: last received seq/frag number from this STA (per RX queue) 267 * @tx_filtered_count: number of frames the hardware filtered for this STA 268 * @tx_retry_failed: number of frames that failed retry 269 * @tx_retry_count: total number of retries for frames to this STA 270 * @fail_avg: moving percentage of failed MSDUs 271 * @tx_packets: number of RX/TX MSDUs 272 * @tx_bytes: number of bytes transmitted to this STA 273 * @tx_fragments: number of transmitted MPDUs 274 * @tid_seq: per-TID sequence numbers for sending to this STA 275 * @ampdu_mlme: A-MPDU state machine state 276 * @timer_to_tid: identity mapping to ID timers 277 * @llid: Local link ID 278 * @plid: Peer link ID 279 * @reason: Cancel reason on PLINK_HOLDING state 280 * @plink_retries: Retries in establishment 281 * @ignore_plink_timer: ignore the peer-link timer (used internally) 282 * @plink_state: peer link state 283 * @plink_timeout: timeout of peer link 284 * @plink_timer: peer link watch timer 285 * @t_offset: timing offset relative to this host 286 * @t_offset_setpoint: reference timing offset of this sta to be used when 287 * calculating clockdrift 288 * @local_pm: local link-specific power save mode 289 * @peer_pm: peer-specific power save mode towards local STA 290 * @nonpeer_pm: STA power save mode towards non-peer neighbors 291 * @debugfs: debug filesystem info 292 * @dead: set to true when sta is unlinked 293 * @uploaded: set to true when sta is uploaded to the driver 294 * @lost_packets: number of consecutive lost packets 295 * @sta: station information we share with the driver 296 * @sta_state: duplicates information about station state (for debug) 297 * @beacon_loss_count: number of times beacon loss has triggered 298 * @rcu_head: RCU head used for freeing this station struct 299 * @cur_max_bandwidth: maximum bandwidth to use for TX to the station, 300 * taken from HT/VHT capabilities or VHT operating mode notification 301 * @chains: chains ever used for RX from this station 302 * @chain_signal_last: last signal (per chain) 303 * @chain_signal_avg: signal average (per chain) 304 */ 305 struct sta_info { 306 /* General information, mostly static */ 307 struct list_head list; 308 struct rcu_head rcu_head; 309 struct sta_info __rcu *hnext; 310 struct ieee80211_local *local; 311 struct ieee80211_sub_if_data *sdata; 312 struct ieee80211_key __rcu *gtk[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS]; 313 struct ieee80211_key __rcu *ptk; 314 struct rate_control_ref *rate_ctrl; 315 void *rate_ctrl_priv; 316 spinlock_t lock; 317 318 struct work_struct drv_unblock_wk; 319 320 u16 listen_interval; 321 322 bool dead; 323 324 bool uploaded; 325 326 enum ieee80211_sta_state sta_state; 327 328 /* use the accessors defined below */ 329 unsigned long _flags; 330 331 /* 332 * STA powersave frame queues, no more than the internal 333 * locking required. 334 */ 335 struct sk_buff_head ps_tx_buf[IEEE80211_NUM_ACS]; 336 struct sk_buff_head tx_filtered[IEEE80211_NUM_ACS]; 337 unsigned long driver_buffered_tids; 338 339 /* Updated from RX path only, no locking requirements */ 340 unsigned long rx_packets; 341 u64 rx_bytes; 342 unsigned long wep_weak_iv_count; 343 unsigned long last_rx; 344 long last_connected; 345 unsigned long num_duplicates; 346 unsigned long rx_fragments; 347 unsigned long rx_dropped; 348 int last_signal; 349 struct ewma avg_signal; 350 int last_ack_signal; 351 352 u8 chains; 353 s8 chain_signal_last[IEEE80211_MAX_CHAINS]; 354 struct ewma chain_signal_avg[IEEE80211_MAX_CHAINS]; 355 356 /* Plus 1 for non-QoS frames */ 357 __le16 last_seq_ctrl[IEEE80211_NUM_TIDS + 1]; 358 359 /* Updated from TX status path only, no locking requirements */ 360 unsigned long tx_filtered_count; 361 unsigned long tx_retry_failed, tx_retry_count; 362 /* moving percentage of failed MSDUs */ 363 unsigned int fail_avg; 364 365 /* Updated from TX path only, no locking requirements */ 366 u32 tx_fragments; 367 u64 tx_packets[IEEE80211_NUM_ACS]; 368 u64 tx_bytes[IEEE80211_NUM_ACS]; 369 struct ieee80211_tx_rate last_tx_rate; 370 int last_rx_rate_idx; 371 u32 last_rx_rate_flag; 372 u8 last_rx_rate_vht_nss; 373 u16 tid_seq[IEEE80211_QOS_CTL_TID_MASK + 1]; 374 375 /* 376 * Aggregation information, locked with lock. 377 */ 378 struct sta_ampdu_mlme ampdu_mlme; 379 u8 timer_to_tid[IEEE80211_NUM_TIDS]; 380 381 #ifdef CONFIG_MAC80211_MESH 382 /* 383 * Mesh peer link attributes 384 * TODO: move to a sub-structure that is referenced with pointer? 385 */ 386 __le16 llid; 387 __le16 plid; 388 __le16 reason; 389 u8 plink_retries; 390 bool ignore_plink_timer; 391 enum nl80211_plink_state plink_state; 392 u32 plink_timeout; 393 struct timer_list plink_timer; 394 s64 t_offset; 395 s64 t_offset_setpoint; 396 /* mesh power save */ 397 enum nl80211_mesh_power_mode local_pm; 398 enum nl80211_mesh_power_mode peer_pm; 399 enum nl80211_mesh_power_mode nonpeer_pm; 400 #endif 401 402 #ifdef CONFIG_MAC80211_DEBUGFS 403 struct sta_info_debugfsdentries { 404 struct dentry *dir; 405 bool add_has_run; 406 } debugfs; 407 #endif 408 409 enum ieee80211_sta_rx_bandwidth cur_max_bandwidth; 410 411 unsigned int lost_packets; 412 unsigned int beacon_loss_count; 413 414 /* keep last! */ 415 struct ieee80211_sta sta; 416 }; 417 418 static inline enum nl80211_plink_state sta_plink_state(struct sta_info *sta) 419 { 420 #ifdef CONFIG_MAC80211_MESH 421 return sta->plink_state; 422 #endif 423 return NL80211_PLINK_LISTEN; 424 } 425 426 static inline void set_sta_flag(struct sta_info *sta, 427 enum ieee80211_sta_info_flags flag) 428 { 429 WARN_ON(flag == WLAN_STA_AUTH || 430 flag == WLAN_STA_ASSOC || 431 flag == WLAN_STA_AUTHORIZED); 432 set_bit(flag, &sta->_flags); 433 } 434 435 static inline void clear_sta_flag(struct sta_info *sta, 436 enum ieee80211_sta_info_flags flag) 437 { 438 WARN_ON(flag == WLAN_STA_AUTH || 439 flag == WLAN_STA_ASSOC || 440 flag == WLAN_STA_AUTHORIZED); 441 clear_bit(flag, &sta->_flags); 442 } 443 444 static inline int test_sta_flag(struct sta_info *sta, 445 enum ieee80211_sta_info_flags flag) 446 { 447 return test_bit(flag, &sta->_flags); 448 } 449 450 static inline int test_and_clear_sta_flag(struct sta_info *sta, 451 enum ieee80211_sta_info_flags flag) 452 { 453 WARN_ON(flag == WLAN_STA_AUTH || 454 flag == WLAN_STA_ASSOC || 455 flag == WLAN_STA_AUTHORIZED); 456 return test_and_clear_bit(flag, &sta->_flags); 457 } 458 459 static inline int test_and_set_sta_flag(struct sta_info *sta, 460 enum ieee80211_sta_info_flags flag) 461 { 462 WARN_ON(flag == WLAN_STA_AUTH || 463 flag == WLAN_STA_ASSOC || 464 flag == WLAN_STA_AUTHORIZED); 465 return test_and_set_bit(flag, &sta->_flags); 466 } 467 468 int sta_info_move_state(struct sta_info *sta, 469 enum ieee80211_sta_state new_state); 470 471 static inline void sta_info_pre_move_state(struct sta_info *sta, 472 enum ieee80211_sta_state new_state) 473 { 474 int ret; 475 476 WARN_ON_ONCE(test_sta_flag(sta, WLAN_STA_INSERTED)); 477 478 ret = sta_info_move_state(sta, new_state); 479 WARN_ON_ONCE(ret); 480 } 481 482 483 void ieee80211_assign_tid_tx(struct sta_info *sta, int tid, 484 struct tid_ampdu_tx *tid_tx); 485 486 static inline struct tid_ampdu_tx * 487 rcu_dereference_protected_tid_tx(struct sta_info *sta, int tid) 488 { 489 return rcu_dereference_protected(sta->ampdu_mlme.tid_tx[tid], 490 lockdep_is_held(&sta->lock) || 491 lockdep_is_held(&sta->ampdu_mlme.mtx)); 492 } 493 494 #define STA_HASH_SIZE 256 495 #define STA_HASH(sta) (sta[5]) 496 497 498 /* Maximum number of frames to buffer per power saving station per AC */ 499 #define STA_MAX_TX_BUFFER 64 500 501 /* Minimum buffered frame expiry time. If STA uses listen interval that is 502 * smaller than this value, the minimum value here is used instead. */ 503 #define STA_TX_BUFFER_EXPIRE (10 * HZ) 504 505 /* How often station data is cleaned up (e.g., expiration of buffered frames) 506 */ 507 #define STA_INFO_CLEANUP_INTERVAL (10 * HZ) 508 509 /* 510 * Get a STA info, must be under RCU read lock. 511 */ 512 struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata, 513 const u8 *addr); 514 515 struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata, 516 const u8 *addr); 517 518 static inline 519 void for_each_sta_info_type_check(struct ieee80211_local *local, 520 const u8 *addr, 521 struct sta_info *sta, 522 struct sta_info *nxt) 523 { 524 } 525 526 #define for_each_sta_info(local, _addr, _sta, nxt) \ 527 for ( /* initialise loop */ \ 528 _sta = rcu_dereference(local->sta_hash[STA_HASH(_addr)]),\ 529 nxt = _sta ? rcu_dereference(_sta->hnext) : NULL; \ 530 /* typecheck */ \ 531 for_each_sta_info_type_check(local, (_addr), _sta, nxt),\ 532 /* continue condition */ \ 533 _sta; \ 534 /* advance loop */ \ 535 _sta = nxt, \ 536 nxt = _sta ? rcu_dereference(_sta->hnext) : NULL \ 537 ) \ 538 /* compare address and run code only if it matches */ \ 539 if (ether_addr_equal(_sta->sta.addr, (_addr))) 540 541 /* 542 * Get STA info by index, BROKEN! 543 */ 544 struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata, 545 int idx); 546 /* 547 * Create a new STA info, caller owns returned structure 548 * until sta_info_insert(). 549 */ 550 struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata, 551 const u8 *addr, gfp_t gfp); 552 553 void sta_info_free(struct ieee80211_local *local, struct sta_info *sta); 554 555 /* 556 * Insert STA info into hash table/list, returns zero or a 557 * -EEXIST if (if the same MAC address is already present). 558 * 559 * Calling the non-rcu version makes the caller relinquish, 560 * the _rcu version calls read_lock_rcu() and must be called 561 * without it held. 562 */ 563 int sta_info_insert(struct sta_info *sta); 564 int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU); 565 566 int __must_check __sta_info_destroy(struct sta_info *sta); 567 int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, 568 const u8 *addr); 569 int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata, 570 const u8 *addr); 571 572 void sta_info_recalc_tim(struct sta_info *sta); 573 574 void sta_info_init(struct ieee80211_local *local); 575 void sta_info_stop(struct ieee80211_local *local); 576 int sta_info_flush_defer(struct ieee80211_sub_if_data *sdata); 577 578 /** 579 * sta_info_flush_cleanup - flush the sta_info cleanup queue 580 * @sdata: the interface 581 * 582 * Flushes the sta_info cleanup queue for a given interface; 583 * this is necessary before the interface is removed or, for 584 * AP/mesh interfaces, before it is deconfigured. 585 * 586 * Note an rcu_barrier() must precede the function, after all 587 * stations have been flushed/removed to ensure the call_rcu() 588 * calls that add stations to the cleanup queue have completed. 589 */ 590 void sta_info_flush_cleanup(struct ieee80211_sub_if_data *sdata); 591 592 /** 593 * sta_info_flush - flush matching STA entries from the STA table 594 * 595 * Returns the number of removed STA entries. 596 * 597 * @sdata: sdata to remove all stations from 598 */ 599 static inline int sta_info_flush(struct ieee80211_sub_if_data *sdata) 600 { 601 int ret = sta_info_flush_defer(sdata); 602 603 rcu_barrier(); 604 sta_info_flush_cleanup(sdata); 605 606 return ret; 607 } 608 609 void sta_set_rate_info_tx(struct sta_info *sta, 610 const struct ieee80211_tx_rate *rate, 611 struct rate_info *rinfo); 612 void sta_set_rate_info_rx(struct sta_info *sta, 613 struct rate_info *rinfo); 614 void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, 615 unsigned long exp_time); 616 617 void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta); 618 void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta); 619 void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta); 620 621 void ieee80211_cleanup_sdata_stas(struct ieee80211_sub_if_data *sdata); 622 623 #endif /* STA_INFO_H */ 624