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 <linux/rhashtable.h> 20#include "key.h" 21 22/** 23 * enum ieee80211_sta_info_flags - Stations flags 24 * 25 * These flags are used with &struct sta_info's @flags member, but 26 * only indirectly with set_sta_flag() and friends. 27 * 28 * @WLAN_STA_AUTH: Station is authenticated. 29 * @WLAN_STA_ASSOC: Station is associated. 30 * @WLAN_STA_PS_STA: Station is in power-save mode 31 * @WLAN_STA_AUTHORIZED: Station is authorized to send/receive traffic. 32 * This bit is always checked so needs to be enabled for all stations 33 * when virtual port control is not in use. 34 * @WLAN_STA_SHORT_PREAMBLE: Station is capable of receiving short-preamble 35 * frames. 36 * @WLAN_STA_WDS: Station is one of our WDS peers. 37 * @WLAN_STA_CLEAR_PS_FILT: Clear PS filter in hardware (using the 38 * IEEE80211_TX_CTL_CLEAR_PS_FILT control flag) when the next 39 * frame to this station is transmitted. 40 * @WLAN_STA_MFP: Management frame protection is used with this STA. 41 * @WLAN_STA_BLOCK_BA: Used to deny ADDBA requests (both TX and RX) 42 * during suspend/resume and station removal. 43 * @WLAN_STA_PS_DRIVER: driver requires keeping this station in 44 * power-save mode logically to flush frames that might still 45 * be in the queues 46 * @WLAN_STA_PSPOLL: Station sent PS-poll while driver was keeping 47 * station in power-save mode, reply when the driver unblocks. 48 * @WLAN_STA_TDLS_PEER: Station is a TDLS peer. 49 * @WLAN_STA_TDLS_PEER_AUTH: This TDLS peer is authorized to send direct 50 * packets. This means the link is enabled. 51 * @WLAN_STA_TDLS_INITIATOR: We are the initiator of the TDLS link with this 52 * station. 53 * @WLAN_STA_TDLS_CHAN_SWITCH: This TDLS peer supports TDLS channel-switching 54 * @WLAN_STA_TDLS_OFF_CHANNEL: The local STA is currently off-channel with this 55 * TDLS peer 56 * @WLAN_STA_UAPSD: Station requested unscheduled SP while driver was 57 * keeping station in power-save mode, reply when the driver 58 * unblocks the station. 59 * @WLAN_STA_SP: Station is in a service period, so don't try to 60 * reply to other uAPSD trigger frames or PS-Poll. 61 * @WLAN_STA_4ADDR_EVENT: 4-addr event was already sent for this frame. 62 * @WLAN_STA_INSERTED: This station is inserted into the hash table. 63 * @WLAN_STA_RATE_CONTROL: rate control was initialized for this station. 64 * @WLAN_STA_TOFFSET_KNOWN: toffset calculated for this station is valid. 65 * @WLAN_STA_MPSP_OWNER: local STA is owner of a mesh Peer Service Period. 66 * @WLAN_STA_MPSP_RECIPIENT: local STA is recipient of a MPSP. 67 * @WLAN_STA_PS_DELIVER: station woke up, but we're still blocking TX 68 * until pending frames are delivered 69 */ 70enum ieee80211_sta_info_flags { 71 WLAN_STA_AUTH, 72 WLAN_STA_ASSOC, 73 WLAN_STA_PS_STA, 74 WLAN_STA_AUTHORIZED, 75 WLAN_STA_SHORT_PREAMBLE, 76 WLAN_STA_WDS, 77 WLAN_STA_CLEAR_PS_FILT, 78 WLAN_STA_MFP, 79 WLAN_STA_BLOCK_BA, 80 WLAN_STA_PS_DRIVER, 81 WLAN_STA_PSPOLL, 82 WLAN_STA_TDLS_PEER, 83 WLAN_STA_TDLS_PEER_AUTH, 84 WLAN_STA_TDLS_INITIATOR, 85 WLAN_STA_TDLS_CHAN_SWITCH, 86 WLAN_STA_TDLS_OFF_CHANNEL, 87 WLAN_STA_UAPSD, 88 WLAN_STA_SP, 89 WLAN_STA_4ADDR_EVENT, 90 WLAN_STA_INSERTED, 91 WLAN_STA_RATE_CONTROL, 92 WLAN_STA_TOFFSET_KNOWN, 93 WLAN_STA_MPSP_OWNER, 94 WLAN_STA_MPSP_RECIPIENT, 95 WLAN_STA_PS_DELIVER, 96}; 97 98#define ADDBA_RESP_INTERVAL HZ 99#define HT_AGG_MAX_RETRIES 15 100#define HT_AGG_BURST_RETRIES 3 101#define HT_AGG_RETRIES_PERIOD (15 * HZ) 102 103#define HT_AGG_STATE_DRV_READY 0 104#define HT_AGG_STATE_RESPONSE_RECEIVED 1 105#define HT_AGG_STATE_OPERATIONAL 2 106#define HT_AGG_STATE_STOPPING 3 107#define HT_AGG_STATE_WANT_START 4 108#define HT_AGG_STATE_WANT_STOP 5 109 110enum ieee80211_agg_stop_reason { 111 AGG_STOP_DECLINED, 112 AGG_STOP_LOCAL_REQUEST, 113 AGG_STOP_PEER_REQUEST, 114 AGG_STOP_DESTROY_STA, 115}; 116 117/** 118 * struct tid_ampdu_tx - TID aggregation information (Tx). 119 * 120 * @rcu_head: rcu head for freeing structure 121 * @session_timer: check if we keep Tx-ing on the TID (by timeout value) 122 * @addba_resp_timer: timer for peer's response to addba request 123 * @pending: pending frames queue -- use sta's spinlock to protect 124 * @dialog_token: dialog token for aggregation session 125 * @timeout: session timeout value to be filled in ADDBA requests 126 * @state: session state (see above) 127 * @last_tx: jiffies of last tx activity 128 * @stop_initiator: initiator of a session stop 129 * @tx_stop: TX DelBA frame when stopping 130 * @buf_size: reorder buffer size at receiver 131 * @failed_bar_ssn: ssn of the last failed BAR tx attempt 132 * @bar_pending: BAR needs to be re-sent 133 * 134 * This structure's lifetime is managed by RCU, assignments to 135 * the array holding it must hold the aggregation mutex. 136 * 137 * The TX path can access it under RCU lock-free if, and 138 * only if, the state has the flag %HT_AGG_STATE_OPERATIONAL 139 * set. Otherwise, the TX path must also acquire the spinlock 140 * and re-check the state, see comments in the tx code 141 * touching it. 142 */ 143struct tid_ampdu_tx { 144 struct rcu_head rcu_head; 145 struct timer_list session_timer; 146 struct timer_list addba_resp_timer; 147 struct sk_buff_head pending; 148 unsigned long state; 149 unsigned long last_tx; 150 u16 timeout; 151 u8 dialog_token; 152 u8 stop_initiator; 153 bool tx_stop; 154 u8 buf_size; 155 156 u16 failed_bar_ssn; 157 bool bar_pending; 158}; 159 160/** 161 * struct tid_ampdu_rx - TID aggregation information (Rx). 162 * 163 * @reorder_buf: buffer to reorder incoming aggregated MPDUs. An MPDU may be an 164 * A-MSDU with individually reported subframes. 165 * @reorder_time: jiffies when skb was added 166 * @session_timer: check if peer keeps Tx-ing on the TID (by timeout value) 167 * @reorder_timer: releases expired frames from the reorder buffer. 168 * @last_rx: jiffies of last rx activity 169 * @head_seq_num: head sequence number in reordering buffer. 170 * @stored_mpdu_num: number of MPDUs in reordering buffer 171 * @ssn: Starting Sequence Number expected to be aggregated. 172 * @buf_size: buffer size for incoming A-MPDUs 173 * @timeout: reset timer value (in TUs). 174 * @dialog_token: dialog token for aggregation session 175 * @rcu_head: RCU head used for freeing this struct 176 * @reorder_lock: serializes access to reorder buffer, see below. 177 * @auto_seq: used for offloaded BA sessions to automatically pick head_seq_and 178 * and ssn. 179 * @removed: this session is removed (but might have been found due to RCU) 180 * 181 * This structure's lifetime is managed by RCU, assignments to 182 * the array holding it must hold the aggregation mutex. 183 * 184 * The @reorder_lock is used to protect the members of this 185 * struct, except for @timeout, @buf_size and @dialog_token, 186 * which are constant across the lifetime of the struct (the 187 * dialog token being used only for debugging). 188 */ 189struct tid_ampdu_rx { 190 struct rcu_head rcu_head; 191 spinlock_t reorder_lock; 192 struct sk_buff_head *reorder_buf; 193 unsigned long *reorder_time; 194 struct timer_list session_timer; 195 struct timer_list reorder_timer; 196 unsigned long last_rx; 197 u16 head_seq_num; 198 u16 stored_mpdu_num; 199 u16 ssn; 200 u16 buf_size; 201 u16 timeout; 202 u8 dialog_token; 203 bool auto_seq; 204 bool removed; 205}; 206 207/** 208 * struct sta_ampdu_mlme - STA aggregation information. 209 * 210 * @tid_rx: aggregation info for Rx per TID -- RCU protected 211 * @tid_tx: aggregation info for Tx per TID 212 * @tid_start_tx: sessions where start was requested 213 * @addba_req_num: number of times addBA request has been sent. 214 * @last_addba_req_time: timestamp of the last addBA request. 215 * @dialog_token_allocator: dialog token enumerator for each new session; 216 * @work: work struct for starting/stopping aggregation 217 * @tid_rx_timer_expired: bitmap indicating on which TIDs the 218 * RX timer expired until the work for it runs 219 * @tid_rx_stop_requested: bitmap indicating which BA sessions per TID the 220 * driver requested to close until the work for it runs 221 * @mtx: mutex to protect all TX data (except non-NULL assignments 222 * to tid_tx[idx], which are protected by the sta spinlock) 223 * tid_start_tx is also protected by sta->lock. 224 */ 225struct sta_ampdu_mlme { 226 struct mutex mtx; 227 /* rx */ 228 struct tid_ampdu_rx __rcu *tid_rx[IEEE80211_NUM_TIDS]; 229 unsigned long tid_rx_timer_expired[BITS_TO_LONGS(IEEE80211_NUM_TIDS)]; 230 unsigned long tid_rx_stop_requested[BITS_TO_LONGS(IEEE80211_NUM_TIDS)]; 231 /* tx */ 232 struct work_struct work; 233 struct tid_ampdu_tx __rcu *tid_tx[IEEE80211_NUM_TIDS]; 234 struct tid_ampdu_tx *tid_start_tx[IEEE80211_NUM_TIDS]; 235 unsigned long last_addba_req_time[IEEE80211_NUM_TIDS]; 236 u8 addba_req_num[IEEE80211_NUM_TIDS]; 237 u8 dialog_token_allocator; 238}; 239 240 241/* Value to indicate no TID reservation */ 242#define IEEE80211_TID_UNRESERVED 0xff 243 244/** 245 * struct sta_info - STA information 246 * 247 * This structure collects information about a station that 248 * mac80211 is communicating with. 249 * 250 * @list: global linked list entry 251 * @free_list: list entry for keeping track of stations to free 252 * @hash_node: hash node for rhashtable 253 * @local: pointer to the global information 254 * @sdata: virtual interface this station belongs to 255 * @ptk: peer keys negotiated with this station, if any 256 * @ptk_idx: last installed peer key index 257 * @gtk: group keys negotiated with this station, if any 258 * @gtk_idx: last installed group key index 259 * @rate_ctrl: rate control algorithm reference 260 * @rate_ctrl_priv: rate control private per-STA pointer 261 * @last_tx_rate: rate used for last transmit, to report to userspace as 262 * "the" transmit rate 263 * @last_rx_rate_idx: rx status rate index of the last data packet 264 * @last_rx_rate_flag: rx status flag of the last data packet 265 * @last_rx_rate_vht_flag: rx status vht flag of the last data packet 266 * @last_rx_rate_vht_nss: rx status nss of last data packet 267 * @lock: used for locking all fields that require locking, see comments 268 * in the header file. 269 * @drv_deliver_wk: used for delivering frames after driver PS unblocking 270 * @listen_interval: listen interval of this station, when we're acting as AP 271 * @_flags: STA flags, see &enum ieee80211_sta_info_flags, do not use directly 272 * @ps_lock: used for powersave (when mac80211 is the AP) related locking 273 * @ps_tx_buf: buffers (per AC) of frames to transmit to this station 274 * when it leaves power saving state or polls 275 * @tx_filtered: buffers (per AC) of frames we already tried to 276 * transmit but were filtered by hardware due to STA having 277 * entered power saving state, these are also delivered to 278 * the station when it leaves powersave or polls for frames 279 * @driver_buffered_tids: bitmap of TIDs the driver has data buffered on 280 * @txq_buffered_tids: bitmap of TIDs that mac80211 has txq data buffered on 281 * @rx_packets: Number of MSDUs received from this STA 282 * @rx_bytes: Number of bytes received from this STA 283 * @last_rx: time (in jiffies) when last frame was received from this STA 284 * @last_connected: time (in seconds) when a station got connected 285 * @num_duplicates: number of duplicate frames received from this STA 286 * @rx_fragments: number of received MPDUs 287 * @rx_dropped: number of dropped MPDUs from this STA 288 * @last_signal: signal of last received frame from this STA 289 * @avg_signal: moving average of signal of received frames from this STA 290 * @last_ack_signal: signal of last received Ack frame from this STA 291 * @last_seq_ctrl: last received seq/frag number from this STA (per RX queue) 292 * @tx_filtered_count: number of frames the hardware filtered for this STA 293 * @tx_retry_failed: number of frames that failed retry 294 * @tx_retry_count: total number of retries for frames to this STA 295 * @fail_avg: moving percentage of failed MSDUs 296 * @tx_packets: number of RX/TX MSDUs 297 * @tx_bytes: number of bytes transmitted to this STA 298 * @tx_fragments: number of transmitted MPDUs 299 * @tid_seq: per-TID sequence numbers for sending to this STA 300 * @ampdu_mlme: A-MPDU state machine state 301 * @timer_to_tid: identity mapping to ID timers 302 * @llid: Local link ID 303 * @plid: Peer link ID 304 * @reason: Cancel reason on PLINK_HOLDING state 305 * @plink_retries: Retries in establishment 306 * @plink_state: peer link state 307 * @plink_timeout: timeout of peer link 308 * @plink_timer: peer link watch timer 309 * @t_offset: timing offset relative to this host 310 * @t_offset_setpoint: reference timing offset of this sta to be used when 311 * calculating clockdrift 312 * @local_pm: local link-specific power save mode 313 * @peer_pm: peer-specific power save mode towards local STA 314 * @nonpeer_pm: STA power save mode towards non-peer neighbors 315 * @debugfs: debug filesystem info 316 * @dead: set to true when sta is unlinked 317 * @uploaded: set to true when sta is uploaded to the driver 318 * @lost_packets: number of consecutive lost packets 319 * @sta: station information we share with the driver 320 * @sta_state: duplicates information about station state (for debug) 321 * @beacon_loss_count: number of times beacon loss has triggered 322 * @rcu_head: RCU head used for freeing this station struct 323 * @cur_max_bandwidth: maximum bandwidth to use for TX to the station, 324 * taken from HT/VHT capabilities or VHT operating mode notification 325 * @chains: chains ever used for RX from this station 326 * @chain_signal_last: last signal (per chain) 327 * @chain_signal_avg: signal average (per chain) 328 * @known_smps_mode: the smps_mode the client thinks we are in. Relevant for 329 * AP only. 330 * @cipher_scheme: optional cipher scheme for this station 331 * @last_tdls_pkt_time: holds the time in jiffies of last TDLS pkt ACKed 332 * @reserved_tid: reserved TID (if any, otherwise IEEE80211_TID_UNRESERVED) 333 * @tx_msdu: MSDUs transmitted to this station, using IEEE80211_NUM_TID 334 * entry for non-QoS frames 335 * @tx_msdu_retries: MSDU retries for transmissions to to this station, 336 * using IEEE80211_NUM_TID entry for non-QoS frames 337 * @tx_msdu_failed: MSDU failures for transmissions to to this station, 338 * using IEEE80211_NUM_TID entry for non-QoS frames 339 * @rx_msdu: MSDUs received from this station, using IEEE80211_NUM_TID 340 * entry for non-QoS frames 341 */ 342struct sta_info { 343 /* General information, mostly static */ 344 struct list_head list, free_list; 345 struct rcu_head rcu_head; 346 struct rhash_head hash_node; 347 struct ieee80211_local *local; 348 struct ieee80211_sub_if_data *sdata; 349 struct ieee80211_key __rcu *gtk[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS]; 350 struct ieee80211_key __rcu *ptk[NUM_DEFAULT_KEYS]; 351 u8 gtk_idx; 352 u8 ptk_idx; 353 struct rate_control_ref *rate_ctrl; 354 void *rate_ctrl_priv; 355 spinlock_t lock; 356 357 struct work_struct drv_deliver_wk; 358 359 u16 listen_interval; 360 361 bool dead; 362 363 bool uploaded; 364 365 enum ieee80211_sta_state sta_state; 366 367 /* use the accessors defined below */ 368 unsigned long _flags; 369 370 /* STA powersave lock and frame queues */ 371 spinlock_t ps_lock; 372 struct sk_buff_head ps_tx_buf[IEEE80211_NUM_ACS]; 373 struct sk_buff_head tx_filtered[IEEE80211_NUM_ACS]; 374 unsigned long driver_buffered_tids; 375 unsigned long txq_buffered_tids; 376 377 /* Updated from RX path only, no locking requirements */ 378 unsigned long rx_packets; 379 u64 rx_bytes; 380 unsigned long last_rx; 381 long last_connected; 382 unsigned long num_duplicates; 383 unsigned long rx_fragments; 384 unsigned long rx_dropped; 385 int last_signal; 386 struct ewma avg_signal; 387 int last_ack_signal; 388 389 u8 chains; 390 s8 chain_signal_last[IEEE80211_MAX_CHAINS]; 391 struct ewma chain_signal_avg[IEEE80211_MAX_CHAINS]; 392 393 /* Plus 1 for non-QoS frames */ 394 __le16 last_seq_ctrl[IEEE80211_NUM_TIDS + 1]; 395 396 /* Updated from TX status path only, no locking requirements */ 397 unsigned long tx_filtered_count; 398 unsigned long tx_retry_failed, tx_retry_count; 399 /* moving percentage of failed MSDUs */ 400 unsigned int fail_avg; 401 402 /* Updated from TX path only, no locking requirements */ 403 u32 tx_fragments; 404 u64 tx_packets[IEEE80211_NUM_ACS]; 405 u64 tx_bytes[IEEE80211_NUM_ACS]; 406 struct ieee80211_tx_rate last_tx_rate; 407 int last_rx_rate_idx; 408 u32 last_rx_rate_flag; 409 u32 last_rx_rate_vht_flag; 410 u8 last_rx_rate_vht_nss; 411 u16 tid_seq[IEEE80211_QOS_CTL_TID_MASK + 1]; 412 u64 tx_msdu[IEEE80211_NUM_TIDS + 1]; 413 u64 tx_msdu_retries[IEEE80211_NUM_TIDS + 1]; 414 u64 tx_msdu_failed[IEEE80211_NUM_TIDS + 1]; 415 u64 rx_msdu[IEEE80211_NUM_TIDS + 1]; 416 417 /* 418 * Aggregation information, locked with lock. 419 */ 420 struct sta_ampdu_mlme ampdu_mlme; 421 u8 timer_to_tid[IEEE80211_NUM_TIDS]; 422 423#ifdef CONFIG_MAC80211_MESH 424 /* 425 * Mesh peer link attributes 426 * TODO: move to a sub-structure that is referenced with pointer? 427 */ 428 u16 llid; 429 u16 plid; 430 u16 reason; 431 u8 plink_retries; 432 enum nl80211_plink_state plink_state; 433 u32 plink_timeout; 434 struct timer_list plink_timer; 435 s64 t_offset; 436 s64 t_offset_setpoint; 437 /* mesh power save */ 438 enum nl80211_mesh_power_mode local_pm; 439 enum nl80211_mesh_power_mode peer_pm; 440 enum nl80211_mesh_power_mode nonpeer_pm; 441#endif 442 443#ifdef CONFIG_MAC80211_DEBUGFS 444 struct sta_info_debugfsdentries { 445 struct dentry *dir; 446 bool add_has_run; 447 } debugfs; 448#endif 449 450 enum ieee80211_sta_rx_bandwidth cur_max_bandwidth; 451 452 unsigned int lost_packets; 453 unsigned int beacon_loss_count; 454 455 enum ieee80211_smps_mode known_smps_mode; 456 const struct ieee80211_cipher_scheme *cipher_scheme; 457 458 /* TDLS timeout data */ 459 unsigned long last_tdls_pkt_time; 460 461 u8 reserved_tid; 462 463 /* keep last! */ 464 struct ieee80211_sta sta; 465}; 466 467static inline enum nl80211_plink_state sta_plink_state(struct sta_info *sta) 468{ 469#ifdef CONFIG_MAC80211_MESH 470 return sta->plink_state; 471#endif 472 return NL80211_PLINK_LISTEN; 473} 474 475static inline void set_sta_flag(struct sta_info *sta, 476 enum ieee80211_sta_info_flags flag) 477{ 478 WARN_ON(flag == WLAN_STA_AUTH || 479 flag == WLAN_STA_ASSOC || 480 flag == WLAN_STA_AUTHORIZED); 481 set_bit(flag, &sta->_flags); 482} 483 484static inline void clear_sta_flag(struct sta_info *sta, 485 enum ieee80211_sta_info_flags flag) 486{ 487 WARN_ON(flag == WLAN_STA_AUTH || 488 flag == WLAN_STA_ASSOC || 489 flag == WLAN_STA_AUTHORIZED); 490 clear_bit(flag, &sta->_flags); 491} 492 493static inline int test_sta_flag(struct sta_info *sta, 494 enum ieee80211_sta_info_flags flag) 495{ 496 return test_bit(flag, &sta->_flags); 497} 498 499static inline int test_and_clear_sta_flag(struct sta_info *sta, 500 enum ieee80211_sta_info_flags flag) 501{ 502 WARN_ON(flag == WLAN_STA_AUTH || 503 flag == WLAN_STA_ASSOC || 504 flag == WLAN_STA_AUTHORIZED); 505 return test_and_clear_bit(flag, &sta->_flags); 506} 507 508static inline int test_and_set_sta_flag(struct sta_info *sta, 509 enum ieee80211_sta_info_flags flag) 510{ 511 WARN_ON(flag == WLAN_STA_AUTH || 512 flag == WLAN_STA_ASSOC || 513 flag == WLAN_STA_AUTHORIZED); 514 return test_and_set_bit(flag, &sta->_flags); 515} 516 517int sta_info_move_state(struct sta_info *sta, 518 enum ieee80211_sta_state new_state); 519 520static inline void sta_info_pre_move_state(struct sta_info *sta, 521 enum ieee80211_sta_state new_state) 522{ 523 int ret; 524 525 WARN_ON_ONCE(test_sta_flag(sta, WLAN_STA_INSERTED)); 526 527 ret = sta_info_move_state(sta, new_state); 528 WARN_ON_ONCE(ret); 529} 530 531 532void ieee80211_assign_tid_tx(struct sta_info *sta, int tid, 533 struct tid_ampdu_tx *tid_tx); 534 535static inline struct tid_ampdu_tx * 536rcu_dereference_protected_tid_tx(struct sta_info *sta, int tid) 537{ 538 return rcu_dereference_protected(sta->ampdu_mlme.tid_tx[tid], 539 lockdep_is_held(&sta->lock) || 540 lockdep_is_held(&sta->ampdu_mlme.mtx)); 541} 542 543/* Maximum number of frames to buffer per power saving station per AC */ 544#define STA_MAX_TX_BUFFER 64 545 546/* Minimum buffered frame expiry time. If STA uses listen interval that is 547 * smaller than this value, the minimum value here is used instead. */ 548#define STA_TX_BUFFER_EXPIRE (10 * HZ) 549 550/* How often station data is cleaned up (e.g., expiration of buffered frames) 551 */ 552#define STA_INFO_CLEANUP_INTERVAL (10 * HZ) 553 554/* 555 * Get a STA info, must be under RCU read lock. 556 */ 557struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata, 558 const u8 *addr); 559 560struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata, 561 const u8 *addr); 562 563u32 sta_addr_hash(const void *key, u32 length, u32 seed); 564 565#define _sta_bucket_idx(_tbl, _a) \ 566 rht_bucket_index(_tbl, sta_addr_hash(_a, ETH_ALEN, (_tbl)->hash_rnd)) 567 568#define for_each_sta_info(local, tbl, _addr, _sta, _tmp) \ 569 rht_for_each_entry_rcu(_sta, _tmp, tbl, \ 570 _sta_bucket_idx(tbl, _addr), \ 571 hash_node) \ 572 /* compare address and run code only if it matches */ \ 573 if (ether_addr_equal(_sta->sta.addr, (_addr))) 574 575/* 576 * Get STA info by index, BROKEN! 577 */ 578struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata, 579 int idx); 580/* 581 * Create a new STA info, caller owns returned structure 582 * until sta_info_insert(). 583 */ 584struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata, 585 const u8 *addr, gfp_t gfp); 586 587void sta_info_free(struct ieee80211_local *local, struct sta_info *sta); 588 589/* 590 * Insert STA info into hash table/list, returns zero or a 591 * -EEXIST if (if the same MAC address is already present). 592 * 593 * Calling the non-rcu version makes the caller relinquish, 594 * the _rcu version calls read_lock_rcu() and must be called 595 * without it held. 596 */ 597int sta_info_insert(struct sta_info *sta); 598int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU); 599 600int __must_check __sta_info_destroy(struct sta_info *sta); 601int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, 602 const u8 *addr); 603int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata, 604 const u8 *addr); 605 606void sta_info_recalc_tim(struct sta_info *sta); 607 608int sta_info_init(struct ieee80211_local *local); 609void sta_info_stop(struct ieee80211_local *local); 610 611/** 612 * sta_info_flush - flush matching STA entries from the STA table 613 * 614 * Returns the number of removed STA entries. 615 * 616 * @sdata: sdata to remove all stations from 617 * @vlans: if the given interface is an AP interface, also flush VLANs 618 */ 619int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans); 620 621static inline int sta_info_flush(struct ieee80211_sub_if_data *sdata) 622{ 623 return __sta_info_flush(sdata, false); 624} 625 626void sta_set_rate_info_tx(struct sta_info *sta, 627 const struct ieee80211_tx_rate *rate, 628 struct rate_info *rinfo); 629void sta_set_rate_info_rx(struct sta_info *sta, 630 struct rate_info *rinfo); 631void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo); 632 633void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, 634 unsigned long exp_time); 635u8 sta_info_tx_streams(struct sta_info *sta); 636 637void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta); 638void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta); 639void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta); 640 641#endif /* STA_INFO_H */ 642