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