1/* 2 * Copyright 2002-2005, Instant802 Networks, Inc. 3 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 4 * Copyright 2013-2014 Intel Mobile Communications GmbH 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 */ 10 11#include <linux/module.h> 12#include <linux/init.h> 13#include <linux/etherdevice.h> 14#include <linux/netdevice.h> 15#include <linux/types.h> 16#include <linux/slab.h> 17#include <linux/skbuff.h> 18#include <linux/if_arp.h> 19#include <linux/timer.h> 20#include <linux/rtnetlink.h> 21 22#include <net/mac80211.h> 23#include "ieee80211_i.h" 24#include "driver-ops.h" 25#include "rate.h" 26#include "sta_info.h" 27#include "debugfs_sta.h" 28#include "mesh.h" 29#include "wme.h" 30 31/** 32 * DOC: STA information lifetime rules 33 * 34 * STA info structures (&struct sta_info) are managed in a hash table 35 * for faster lookup and a list for iteration. They are managed using 36 * RCU, i.e. access to the list and hash table is protected by RCU. 37 * 38 * Upon allocating a STA info structure with sta_info_alloc(), the caller 39 * owns that structure. It must then insert it into the hash table using 40 * either sta_info_insert() or sta_info_insert_rcu(); only in the latter 41 * case (which acquires an rcu read section but must not be called from 42 * within one) will the pointer still be valid after the call. Note that 43 * the caller may not do much with the STA info before inserting it, in 44 * particular, it may not start any mesh peer link management or add 45 * encryption keys. 46 * 47 * When the insertion fails (sta_info_insert()) returns non-zero), the 48 * structure will have been freed by sta_info_insert()! 49 * 50 * Station entries are added by mac80211 when you establish a link with a 51 * peer. This means different things for the different type of interfaces 52 * we support. For a regular station this mean we add the AP sta when we 53 * receive an association response from the AP. For IBSS this occurs when 54 * get to know about a peer on the same IBSS. For WDS we add the sta for 55 * the peer immediately upon device open. When using AP mode we add stations 56 * for each respective station upon request from userspace through nl80211. 57 * 58 * In order to remove a STA info structure, various sta_info_destroy_*() 59 * calls are available. 60 * 61 * There is no concept of ownership on a STA entry, each structure is 62 * owned by the global hash table/list until it is removed. All users of 63 * the structure need to be RCU protected so that the structure won't be 64 * freed before they are done using it. 65 */ 66 67static const struct rhashtable_params sta_rht_params = { 68 .nelem_hint = 3, /* start small */ 69 .automatic_shrinking = true, 70 .head_offset = offsetof(struct sta_info, hash_node), 71 .key_offset = offsetof(struct sta_info, sta.addr), 72 .key_len = ETH_ALEN, 73 .hashfn = sta_addr_hash, 74}; 75 76/* Caller must hold local->sta_mtx */ 77static int sta_info_hash_del(struct ieee80211_local *local, 78 struct sta_info *sta) 79{ 80 return rhashtable_remove_fast(&local->sta_hash, &sta->hash_node, 81 sta_rht_params); 82} 83 84static void __cleanup_single_sta(struct sta_info *sta) 85{ 86 int ac, i; 87 struct tid_ampdu_tx *tid_tx; 88 struct ieee80211_sub_if_data *sdata = sta->sdata; 89 struct ieee80211_local *local = sdata->local; 90 struct ps_data *ps; 91 92 if (test_sta_flag(sta, WLAN_STA_PS_STA) || 93 test_sta_flag(sta, WLAN_STA_PS_DRIVER) || 94 test_sta_flag(sta, WLAN_STA_PS_DELIVER)) { 95 if (sta->sdata->vif.type == NL80211_IFTYPE_AP || 96 sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 97 ps = &sdata->bss->ps; 98 else if (ieee80211_vif_is_mesh(&sdata->vif)) 99 ps = &sdata->u.mesh.ps; 100 else 101 return; 102 103 clear_sta_flag(sta, WLAN_STA_PS_STA); 104 clear_sta_flag(sta, WLAN_STA_PS_DRIVER); 105 clear_sta_flag(sta, WLAN_STA_PS_DELIVER); 106 107 atomic_dec(&ps->num_sta_ps); 108 } 109 110 if (sta->sta.txq[0]) { 111 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) { 112 struct txq_info *txqi = to_txq_info(sta->sta.txq[i]); 113 int n = skb_queue_len(&txqi->queue); 114 115 ieee80211_purge_tx_queue(&local->hw, &txqi->queue); 116 atomic_sub(n, &sdata->txqs_len[txqi->txq.ac]); 117 } 118 } 119 120 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 121 local->total_ps_buffered -= skb_queue_len(&sta->ps_tx_buf[ac]); 122 ieee80211_purge_tx_queue(&local->hw, &sta->ps_tx_buf[ac]); 123 ieee80211_purge_tx_queue(&local->hw, &sta->tx_filtered[ac]); 124 } 125 126 if (ieee80211_vif_is_mesh(&sdata->vif)) 127 mesh_sta_cleanup(sta); 128 129 cancel_work_sync(&sta->drv_deliver_wk); 130 131 /* 132 * Destroy aggregation state here. It would be nice to wait for the 133 * driver to finish aggregation stop and then clean up, but for now 134 * drivers have to handle aggregation stop being requested, followed 135 * directly by station destruction. 136 */ 137 for (i = 0; i < IEEE80211_NUM_TIDS; i++) { 138 kfree(sta->ampdu_mlme.tid_start_tx[i]); 139 tid_tx = rcu_dereference_raw(sta->ampdu_mlme.tid_tx[i]); 140 if (!tid_tx) 141 continue; 142 ieee80211_purge_tx_queue(&local->hw, &tid_tx->pending); 143 kfree(tid_tx); 144 } 145} 146 147static void cleanup_single_sta(struct sta_info *sta) 148{ 149 struct ieee80211_sub_if_data *sdata = sta->sdata; 150 struct ieee80211_local *local = sdata->local; 151 152 __cleanup_single_sta(sta); 153 sta_info_free(local, sta); 154} 155 156/* protected by RCU */ 157struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata, 158 const u8 *addr) 159{ 160 struct ieee80211_local *local = sdata->local; 161 struct sta_info *sta; 162 struct rhash_head *tmp; 163 const struct bucket_table *tbl; 164 165 rcu_read_lock(); 166 tbl = rht_dereference_rcu(local->sta_hash.tbl, &local->sta_hash); 167 168 for_each_sta_info(local, tbl, addr, sta, tmp) { 169 if (sta->sdata == sdata) { 170 rcu_read_unlock(); 171 /* this is safe as the caller must already hold 172 * another rcu read section or the mutex 173 */ 174 return sta; 175 } 176 } 177 rcu_read_unlock(); 178 return NULL; 179} 180 181/* 182 * Get sta info either from the specified interface 183 * or from one of its vlans 184 */ 185struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata, 186 const u8 *addr) 187{ 188 struct ieee80211_local *local = sdata->local; 189 struct sta_info *sta; 190 struct rhash_head *tmp; 191 const struct bucket_table *tbl; 192 193 rcu_read_lock(); 194 tbl = rht_dereference_rcu(local->sta_hash.tbl, &local->sta_hash); 195 196 for_each_sta_info(local, tbl, addr, sta, tmp) { 197 if (sta->sdata == sdata || 198 (sta->sdata->bss && sta->sdata->bss == sdata->bss)) { 199 rcu_read_unlock(); 200 /* this is safe as the caller must already hold 201 * another rcu read section or the mutex 202 */ 203 return sta; 204 } 205 } 206 rcu_read_unlock(); 207 return NULL; 208} 209 210struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata, 211 int idx) 212{ 213 struct ieee80211_local *local = sdata->local; 214 struct sta_info *sta; 215 int i = 0; 216 217 list_for_each_entry_rcu(sta, &local->sta_list, list) { 218 if (sdata != sta->sdata) 219 continue; 220 if (i < idx) { 221 ++i; 222 continue; 223 } 224 return sta; 225 } 226 227 return NULL; 228} 229 230/** 231 * sta_info_free - free STA 232 * 233 * @local: pointer to the global information 234 * @sta: STA info to free 235 * 236 * This function must undo everything done by sta_info_alloc() 237 * that may happen before sta_info_insert(). It may only be 238 * called when sta_info_insert() has not been attempted (and 239 * if that fails, the station is freed anyway.) 240 */ 241void sta_info_free(struct ieee80211_local *local, struct sta_info *sta) 242{ 243 if (sta->rate_ctrl) 244 rate_control_free_sta(sta); 245 246 sta_dbg(sta->sdata, "Destroyed STA %pM\n", sta->sta.addr); 247 248 if (sta->sta.txq[0]) 249 kfree(to_txq_info(sta->sta.txq[0])); 250 kfree(rcu_dereference_raw(sta->sta.rates)); 251 kfree(sta); 252} 253 254/* Caller must hold local->sta_mtx */ 255static int sta_info_hash_add(struct ieee80211_local *local, 256 struct sta_info *sta) 257{ 258 return rhashtable_insert_fast(&local->sta_hash, &sta->hash_node, 259 sta_rht_params); 260} 261 262static void sta_deliver_ps_frames(struct work_struct *wk) 263{ 264 struct sta_info *sta; 265 266 sta = container_of(wk, struct sta_info, drv_deliver_wk); 267 268 if (sta->dead) 269 return; 270 271 local_bh_disable(); 272 if (!test_sta_flag(sta, WLAN_STA_PS_STA)) 273 ieee80211_sta_ps_deliver_wakeup(sta); 274 else if (test_and_clear_sta_flag(sta, WLAN_STA_PSPOLL)) 275 ieee80211_sta_ps_deliver_poll_response(sta); 276 else if (test_and_clear_sta_flag(sta, WLAN_STA_UAPSD)) 277 ieee80211_sta_ps_deliver_uapsd(sta); 278 local_bh_enable(); 279} 280 281static int sta_prepare_rate_control(struct ieee80211_local *local, 282 struct sta_info *sta, gfp_t gfp) 283{ 284 if (local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL) 285 return 0; 286 287 sta->rate_ctrl = local->rate_ctrl; 288 sta->rate_ctrl_priv = rate_control_alloc_sta(sta->rate_ctrl, 289 &sta->sta, gfp); 290 if (!sta->rate_ctrl_priv) 291 return -ENOMEM; 292 293 return 0; 294} 295 296struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata, 297 const u8 *addr, gfp_t gfp) 298{ 299 struct ieee80211_local *local = sdata->local; 300 struct ieee80211_hw *hw = &local->hw; 301 struct sta_info *sta; 302 struct timespec uptime; 303 int i; 304 305 sta = kzalloc(sizeof(*sta) + hw->sta_data_size, gfp); 306 if (!sta) 307 return NULL; 308 309 spin_lock_init(&sta->lock); 310 spin_lock_init(&sta->ps_lock); 311 INIT_WORK(&sta->drv_deliver_wk, sta_deliver_ps_frames); 312 INIT_WORK(&sta->ampdu_mlme.work, ieee80211_ba_session_work); 313 mutex_init(&sta->ampdu_mlme.mtx); 314#ifdef CONFIG_MAC80211_MESH 315 if (ieee80211_vif_is_mesh(&sdata->vif) && 316 !sdata->u.mesh.user_mpm) 317 init_timer(&sta->plink_timer); 318 sta->nonpeer_pm = NL80211_MESH_POWER_ACTIVE; 319#endif 320 321 memcpy(sta->sta.addr, addr, ETH_ALEN); 322 sta->local = local; 323 sta->sdata = sdata; 324 sta->last_rx = jiffies; 325 326 sta->sta_state = IEEE80211_STA_NONE; 327 328 /* Mark TID as unreserved */ 329 sta->reserved_tid = IEEE80211_TID_UNRESERVED; 330 331 ktime_get_ts(&uptime); 332 sta->last_connected = uptime.tv_sec; 333 ewma_init(&sta->avg_signal, 1024, 8); 334 for (i = 0; i < ARRAY_SIZE(sta->chain_signal_avg); i++) 335 ewma_init(&sta->chain_signal_avg[i], 1024, 8); 336 337 if (local->ops->wake_tx_queue) { 338 void *txq_data; 339 int size = sizeof(struct txq_info) + 340 ALIGN(hw->txq_data_size, sizeof(void *)); 341 342 txq_data = kcalloc(ARRAY_SIZE(sta->sta.txq), size, gfp); 343 if (!txq_data) 344 goto free; 345 346 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) { 347 struct txq_info *txq = txq_data + i * size; 348 349 ieee80211_init_tx_queue(sdata, sta, txq, i); 350 } 351 } 352 353 if (sta_prepare_rate_control(local, sta, gfp)) 354 goto free_txq; 355 356 for (i = 0; i < IEEE80211_NUM_TIDS; i++) { 357 /* 358 * timer_to_tid must be initialized with identity mapping 359 * to enable session_timer's data differentiation. See 360 * sta_rx_agg_session_timer_expired for usage. 361 */ 362 sta->timer_to_tid[i] = i; 363 } 364 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 365 skb_queue_head_init(&sta->ps_tx_buf[i]); 366 skb_queue_head_init(&sta->tx_filtered[i]); 367 } 368 369 for (i = 0; i < IEEE80211_NUM_TIDS; i++) 370 sta->last_seq_ctrl[i] = cpu_to_le16(USHRT_MAX); 371 372 sta->sta.smps_mode = IEEE80211_SMPS_OFF; 373 if (sdata->vif.type == NL80211_IFTYPE_AP || 374 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 375 struct ieee80211_supported_band *sband = 376 hw->wiphy->bands[ieee80211_get_sdata_band(sdata)]; 377 u8 smps = (sband->ht_cap.cap & IEEE80211_HT_CAP_SM_PS) >> 378 IEEE80211_HT_CAP_SM_PS_SHIFT; 379 /* 380 * Assume that hostapd advertises our caps in the beacon and 381 * this is the known_smps_mode for a station that just assciated 382 */ 383 switch (smps) { 384 case WLAN_HT_SMPS_CONTROL_DISABLED: 385 sta->known_smps_mode = IEEE80211_SMPS_OFF; 386 break; 387 case WLAN_HT_SMPS_CONTROL_STATIC: 388 sta->known_smps_mode = IEEE80211_SMPS_STATIC; 389 break; 390 case WLAN_HT_SMPS_CONTROL_DYNAMIC: 391 sta->known_smps_mode = IEEE80211_SMPS_DYNAMIC; 392 break; 393 default: 394 WARN_ON(1); 395 } 396 } 397 398 sta_dbg(sdata, "Allocated STA %pM\n", sta->sta.addr); 399 400 return sta; 401 402free_txq: 403 if (sta->sta.txq[0]) 404 kfree(to_txq_info(sta->sta.txq[0])); 405free: 406 kfree(sta); 407 return NULL; 408} 409 410static int sta_info_insert_check(struct sta_info *sta) 411{ 412 struct ieee80211_sub_if_data *sdata = sta->sdata; 413 414 /* 415 * Can't be a WARN_ON because it can be triggered through a race: 416 * something inserts a STA (on one CPU) without holding the RTNL 417 * and another CPU turns off the net device. 418 */ 419 if (unlikely(!ieee80211_sdata_running(sdata))) 420 return -ENETDOWN; 421 422 if (WARN_ON(ether_addr_equal(sta->sta.addr, sdata->vif.addr) || 423 is_multicast_ether_addr(sta->sta.addr))) 424 return -EINVAL; 425 426 return 0; 427} 428 429static int sta_info_insert_drv_state(struct ieee80211_local *local, 430 struct ieee80211_sub_if_data *sdata, 431 struct sta_info *sta) 432{ 433 enum ieee80211_sta_state state; 434 int err = 0; 435 436 for (state = IEEE80211_STA_NOTEXIST; state < sta->sta_state; state++) { 437 err = drv_sta_state(local, sdata, sta, state, state + 1); 438 if (err) 439 break; 440 } 441 442 if (!err) { 443 /* 444 * Drivers using legacy sta_add/sta_remove callbacks only 445 * get uploaded set to true after sta_add is called. 446 */ 447 if (!local->ops->sta_add) 448 sta->uploaded = true; 449 return 0; 450 } 451 452 if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { 453 sdata_info(sdata, 454 "failed to move IBSS STA %pM to state %d (%d) - keeping it anyway\n", 455 sta->sta.addr, state + 1, err); 456 err = 0; 457 } 458 459 /* unwind on error */ 460 for (; state > IEEE80211_STA_NOTEXIST; state--) 461 WARN_ON(drv_sta_state(local, sdata, sta, state, state - 1)); 462 463 return err; 464} 465 466/* 467 * should be called with sta_mtx locked 468 * this function replaces the mutex lock 469 * with a RCU lock 470 */ 471static int sta_info_insert_finish(struct sta_info *sta) __acquires(RCU) 472{ 473 struct ieee80211_local *local = sta->local; 474 struct ieee80211_sub_if_data *sdata = sta->sdata; 475 struct station_info sinfo; 476 int err = 0; 477 478 lockdep_assert_held(&local->sta_mtx); 479 480 /* check if STA exists already */ 481 if (sta_info_get_bss(sdata, sta->sta.addr)) { 482 err = -EEXIST; 483 goto out_err; 484 } 485 486 local->num_sta++; 487 local->sta_generation++; 488 smp_mb(); 489 490 /* simplify things and don't accept BA sessions yet */ 491 set_sta_flag(sta, WLAN_STA_BLOCK_BA); 492 493 /* make the station visible */ 494 err = sta_info_hash_add(local, sta); 495 if (err) 496 goto out_drop_sta; 497 498 list_add_tail_rcu(&sta->list, &local->sta_list); 499 500 /* notify driver */ 501 err = sta_info_insert_drv_state(local, sdata, sta); 502 if (err) 503 goto out_remove; 504 505 set_sta_flag(sta, WLAN_STA_INSERTED); 506 /* accept BA sessions now */ 507 clear_sta_flag(sta, WLAN_STA_BLOCK_BA); 508 509 ieee80211_recalc_min_chandef(sdata); 510 ieee80211_sta_debugfs_add(sta); 511 rate_control_add_sta_debugfs(sta); 512 513 memset(&sinfo, 0, sizeof(sinfo)); 514 sinfo.filled = 0; 515 sinfo.generation = local->sta_generation; 516 cfg80211_new_sta(sdata->dev, sta->sta.addr, &sinfo, GFP_KERNEL); 517 518 sta_dbg(sdata, "Inserted STA %pM\n", sta->sta.addr); 519 520 /* move reference to rcu-protected */ 521 rcu_read_lock(); 522 mutex_unlock(&local->sta_mtx); 523 524 if (ieee80211_vif_is_mesh(&sdata->vif)) 525 mesh_accept_plinks_update(sdata); 526 527 return 0; 528 out_remove: 529 sta_info_hash_del(local, sta); 530 list_del_rcu(&sta->list); 531 out_drop_sta: 532 local->num_sta--; 533 synchronize_net(); 534 __cleanup_single_sta(sta); 535 out_err: 536 mutex_unlock(&local->sta_mtx); 537 rcu_read_lock(); 538 return err; 539} 540 541int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU) 542{ 543 struct ieee80211_local *local = sta->local; 544 int err; 545 546 might_sleep(); 547 548 err = sta_info_insert_check(sta); 549 if (err) { 550 rcu_read_lock(); 551 goto out_free; 552 } 553 554 mutex_lock(&local->sta_mtx); 555 556 err = sta_info_insert_finish(sta); 557 if (err) 558 goto out_free; 559 560 return 0; 561 out_free: 562 sta_info_free(local, sta); 563 return err; 564} 565 566int sta_info_insert(struct sta_info *sta) 567{ 568 int err = sta_info_insert_rcu(sta); 569 570 rcu_read_unlock(); 571 572 return err; 573} 574 575static inline void __bss_tim_set(u8 *tim, u16 id) 576{ 577 /* 578 * This format has been mandated by the IEEE specifications, 579 * so this line may not be changed to use the __set_bit() format. 580 */ 581 tim[id / 8] |= (1 << (id % 8)); 582} 583 584static inline void __bss_tim_clear(u8 *tim, u16 id) 585{ 586 /* 587 * This format has been mandated by the IEEE specifications, 588 * so this line may not be changed to use the __clear_bit() format. 589 */ 590 tim[id / 8] &= ~(1 << (id % 8)); 591} 592 593static inline bool __bss_tim_get(u8 *tim, u16 id) 594{ 595 /* 596 * This format has been mandated by the IEEE specifications, 597 * so this line may not be changed to use the test_bit() format. 598 */ 599 return tim[id / 8] & (1 << (id % 8)); 600} 601 602static unsigned long ieee80211_tids_for_ac(int ac) 603{ 604 /* If we ever support TIDs > 7, this obviously needs to be adjusted */ 605 switch (ac) { 606 case IEEE80211_AC_VO: 607 return BIT(6) | BIT(7); 608 case IEEE80211_AC_VI: 609 return BIT(4) | BIT(5); 610 case IEEE80211_AC_BE: 611 return BIT(0) | BIT(3); 612 case IEEE80211_AC_BK: 613 return BIT(1) | BIT(2); 614 default: 615 WARN_ON(1); 616 return 0; 617 } 618} 619 620static void __sta_info_recalc_tim(struct sta_info *sta, bool ignore_pending) 621{ 622 struct ieee80211_local *local = sta->local; 623 struct ps_data *ps; 624 bool indicate_tim = false; 625 u8 ignore_for_tim = sta->sta.uapsd_queues; 626 int ac; 627 u16 id; 628 629 if (sta->sdata->vif.type == NL80211_IFTYPE_AP || 630 sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 631 if (WARN_ON_ONCE(!sta->sdata->bss)) 632 return; 633 634 ps = &sta->sdata->bss->ps; 635 id = sta->sta.aid; 636#ifdef CONFIG_MAC80211_MESH 637 } else if (ieee80211_vif_is_mesh(&sta->sdata->vif)) { 638 ps = &sta->sdata->u.mesh.ps; 639 /* TIM map only for 1 <= PLID <= IEEE80211_MAX_AID */ 640 id = sta->plid % (IEEE80211_MAX_AID + 1); 641#endif 642 } else { 643 return; 644 } 645 646 /* No need to do anything if the driver does all */ 647 if (local->hw.flags & IEEE80211_HW_AP_LINK_PS) 648 return; 649 650 if (sta->dead) 651 goto done; 652 653 /* 654 * If all ACs are delivery-enabled then we should build 655 * the TIM bit for all ACs anyway; if only some are then 656 * we ignore those and build the TIM bit using only the 657 * non-enabled ones. 658 */ 659 if (ignore_for_tim == BIT(IEEE80211_NUM_ACS) - 1) 660 ignore_for_tim = 0; 661 662 if (ignore_pending) 663 ignore_for_tim = BIT(IEEE80211_NUM_ACS) - 1; 664 665 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 666 unsigned long tids; 667 668 if (ignore_for_tim & BIT(ac)) 669 continue; 670 671 indicate_tim |= !skb_queue_empty(&sta->tx_filtered[ac]) || 672 !skb_queue_empty(&sta->ps_tx_buf[ac]); 673 if (indicate_tim) 674 break; 675 676 tids = ieee80211_tids_for_ac(ac); 677 678 indicate_tim |= 679 sta->driver_buffered_tids & tids; 680 indicate_tim |= 681 sta->txq_buffered_tids & tids; 682 } 683 684 done: 685 spin_lock_bh(&local->tim_lock); 686 687 if (indicate_tim == __bss_tim_get(ps->tim, id)) 688 goto out_unlock; 689 690 if (indicate_tim) 691 __bss_tim_set(ps->tim, id); 692 else 693 __bss_tim_clear(ps->tim, id); 694 695 if (local->ops->set_tim && !WARN_ON(sta->dead)) { 696 local->tim_in_locked_section = true; 697 drv_set_tim(local, &sta->sta, indicate_tim); 698 local->tim_in_locked_section = false; 699 } 700 701out_unlock: 702 spin_unlock_bh(&local->tim_lock); 703} 704 705void sta_info_recalc_tim(struct sta_info *sta) 706{ 707 __sta_info_recalc_tim(sta, false); 708} 709 710static bool sta_info_buffer_expired(struct sta_info *sta, struct sk_buff *skb) 711{ 712 struct ieee80211_tx_info *info; 713 int timeout; 714 715 if (!skb) 716 return false; 717 718 info = IEEE80211_SKB_CB(skb); 719 720 /* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */ 721 timeout = (sta->listen_interval * 722 sta->sdata->vif.bss_conf.beacon_int * 723 32 / 15625) * HZ; 724 if (timeout < STA_TX_BUFFER_EXPIRE) 725 timeout = STA_TX_BUFFER_EXPIRE; 726 return time_after(jiffies, info->control.jiffies + timeout); 727} 728 729 730static bool sta_info_cleanup_expire_buffered_ac(struct ieee80211_local *local, 731 struct sta_info *sta, int ac) 732{ 733 unsigned long flags; 734 struct sk_buff *skb; 735 736 /* 737 * First check for frames that should expire on the filtered 738 * queue. Frames here were rejected by the driver and are on 739 * a separate queue to avoid reordering with normal PS-buffered 740 * frames. They also aren't accounted for right now in the 741 * total_ps_buffered counter. 742 */ 743 for (;;) { 744 spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags); 745 skb = skb_peek(&sta->tx_filtered[ac]); 746 if (sta_info_buffer_expired(sta, skb)) 747 skb = __skb_dequeue(&sta->tx_filtered[ac]); 748 else 749 skb = NULL; 750 spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags); 751 752 /* 753 * Frames are queued in order, so if this one 754 * hasn't expired yet we can stop testing. If 755 * we actually reached the end of the queue we 756 * also need to stop, of course. 757 */ 758 if (!skb) 759 break; 760 ieee80211_free_txskb(&local->hw, skb); 761 } 762 763 /* 764 * Now also check the normal PS-buffered queue, this will 765 * only find something if the filtered queue was emptied 766 * since the filtered frames are all before the normal PS 767 * buffered frames. 768 */ 769 for (;;) { 770 spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags); 771 skb = skb_peek(&sta->ps_tx_buf[ac]); 772 if (sta_info_buffer_expired(sta, skb)) 773 skb = __skb_dequeue(&sta->ps_tx_buf[ac]); 774 else 775 skb = NULL; 776 spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags); 777 778 /* 779 * frames are queued in order, so if this one 780 * hasn't expired yet (or we reached the end of 781 * the queue) we can stop testing 782 */ 783 if (!skb) 784 break; 785 786 local->total_ps_buffered--; 787 ps_dbg(sta->sdata, "Buffered frame expired (STA %pM)\n", 788 sta->sta.addr); 789 ieee80211_free_txskb(&local->hw, skb); 790 } 791 792 /* 793 * Finally, recalculate the TIM bit for this station -- it might 794 * now be clear because the station was too slow to retrieve its 795 * frames. 796 */ 797 sta_info_recalc_tim(sta); 798 799 /* 800 * Return whether there are any frames still buffered, this is 801 * used to check whether the cleanup timer still needs to run, 802 * if there are no frames we don't need to rearm the timer. 803 */ 804 return !(skb_queue_empty(&sta->ps_tx_buf[ac]) && 805 skb_queue_empty(&sta->tx_filtered[ac])); 806} 807 808static bool sta_info_cleanup_expire_buffered(struct ieee80211_local *local, 809 struct sta_info *sta) 810{ 811 bool have_buffered = false; 812 int ac; 813 814 /* This is only necessary for stations on BSS/MBSS interfaces */ 815 if (!sta->sdata->bss && 816 !ieee80211_vif_is_mesh(&sta->sdata->vif)) 817 return false; 818 819 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 820 have_buffered |= 821 sta_info_cleanup_expire_buffered_ac(local, sta, ac); 822 823 return have_buffered; 824} 825 826static int __must_check __sta_info_destroy_part1(struct sta_info *sta) 827{ 828 struct ieee80211_local *local; 829 struct ieee80211_sub_if_data *sdata; 830 int ret; 831 832 might_sleep(); 833 834 if (!sta) 835 return -ENOENT; 836 837 local = sta->local; 838 sdata = sta->sdata; 839 840 lockdep_assert_held(&local->sta_mtx); 841 842 /* 843 * Before removing the station from the driver and 844 * rate control, it might still start new aggregation 845 * sessions -- block that to make sure the tear-down 846 * will be sufficient. 847 */ 848 set_sta_flag(sta, WLAN_STA_BLOCK_BA); 849 ieee80211_sta_tear_down_BA_sessions(sta, AGG_STOP_DESTROY_STA); 850 851 ret = sta_info_hash_del(local, sta); 852 if (WARN_ON(ret)) 853 return ret; 854 855 /* 856 * for TDLS peers, make sure to return to the base channel before 857 * removal. 858 */ 859 if (test_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL)) { 860 drv_tdls_cancel_channel_switch(local, sdata, &sta->sta); 861 clear_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL); 862 } 863 864 list_del_rcu(&sta->list); 865 866 drv_sta_pre_rcu_remove(local, sta->sdata, sta); 867 868 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN && 869 rcu_access_pointer(sdata->u.vlan.sta) == sta) 870 RCU_INIT_POINTER(sdata->u.vlan.sta, NULL); 871 872 return 0; 873} 874 875static void __sta_info_destroy_part2(struct sta_info *sta) 876{ 877 struct ieee80211_local *local = sta->local; 878 struct ieee80211_sub_if_data *sdata = sta->sdata; 879 struct station_info sinfo = {}; 880 int ret; 881 882 /* 883 * NOTE: This assumes at least synchronize_net() was done 884 * after _part1 and before _part2! 885 */ 886 887 might_sleep(); 888 lockdep_assert_held(&local->sta_mtx); 889 890 /* now keys can no longer be reached */ 891 ieee80211_free_sta_keys(local, sta); 892 893 /* disable TIM bit - last chance to tell driver */ 894 __sta_info_recalc_tim(sta, true); 895 896 sta->dead = true; 897 898 local->num_sta--; 899 local->sta_generation++; 900 901 while (sta->sta_state > IEEE80211_STA_NONE) { 902 ret = sta_info_move_state(sta, sta->sta_state - 1); 903 if (ret) { 904 WARN_ON_ONCE(1); 905 break; 906 } 907 } 908 909 if (sta->uploaded) { 910 ret = drv_sta_state(local, sdata, sta, IEEE80211_STA_NONE, 911 IEEE80211_STA_NOTEXIST); 912 WARN_ON_ONCE(ret != 0); 913 } 914 915 sta_dbg(sdata, "Removed STA %pM\n", sta->sta.addr); 916 917 sta_set_sinfo(sta, &sinfo); 918 cfg80211_del_sta_sinfo(sdata->dev, sta->sta.addr, &sinfo, GFP_KERNEL); 919 920 rate_control_remove_sta_debugfs(sta); 921 ieee80211_sta_debugfs_remove(sta); 922 ieee80211_recalc_min_chandef(sdata); 923 924 cleanup_single_sta(sta); 925} 926 927int __must_check __sta_info_destroy(struct sta_info *sta) 928{ 929 int err = __sta_info_destroy_part1(sta); 930 931 if (err) 932 return err; 933 934 synchronize_net(); 935 936 __sta_info_destroy_part2(sta); 937 938 return 0; 939} 940 941int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, const u8 *addr) 942{ 943 struct sta_info *sta; 944 int ret; 945 946 mutex_lock(&sdata->local->sta_mtx); 947 sta = sta_info_get(sdata, addr); 948 ret = __sta_info_destroy(sta); 949 mutex_unlock(&sdata->local->sta_mtx); 950 951 return ret; 952} 953 954int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata, 955 const u8 *addr) 956{ 957 struct sta_info *sta; 958 int ret; 959 960 mutex_lock(&sdata->local->sta_mtx); 961 sta = sta_info_get_bss(sdata, addr); 962 ret = __sta_info_destroy(sta); 963 mutex_unlock(&sdata->local->sta_mtx); 964 965 return ret; 966} 967 968static void sta_info_cleanup(unsigned long data) 969{ 970 struct ieee80211_local *local = (struct ieee80211_local *) data; 971 struct sta_info *sta; 972 bool timer_needed = false; 973 974 rcu_read_lock(); 975 list_for_each_entry_rcu(sta, &local->sta_list, list) 976 if (sta_info_cleanup_expire_buffered(local, sta)) 977 timer_needed = true; 978 rcu_read_unlock(); 979 980 if (local->quiescing) 981 return; 982 983 if (!timer_needed) 984 return; 985 986 mod_timer(&local->sta_cleanup, 987 round_jiffies(jiffies + STA_INFO_CLEANUP_INTERVAL)); 988} 989 990u32 sta_addr_hash(const void *key, u32 length, u32 seed) 991{ 992 return jhash(key, ETH_ALEN, seed); 993} 994 995int sta_info_init(struct ieee80211_local *local) 996{ 997 int err; 998 999 err = rhashtable_init(&local->sta_hash, &sta_rht_params); 1000 if (err) 1001 return err; 1002 1003 spin_lock_init(&local->tim_lock); 1004 mutex_init(&local->sta_mtx); 1005 INIT_LIST_HEAD(&local->sta_list); 1006 1007 setup_timer(&local->sta_cleanup, sta_info_cleanup, 1008 (unsigned long)local); 1009 return 0; 1010} 1011 1012void sta_info_stop(struct ieee80211_local *local) 1013{ 1014 del_timer_sync(&local->sta_cleanup); 1015 rhashtable_destroy(&local->sta_hash); 1016} 1017 1018 1019int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans) 1020{ 1021 struct ieee80211_local *local = sdata->local; 1022 struct sta_info *sta, *tmp; 1023 LIST_HEAD(free_list); 1024 int ret = 0; 1025 1026 might_sleep(); 1027 1028 WARN_ON(vlans && sdata->vif.type != NL80211_IFTYPE_AP); 1029 WARN_ON(vlans && !sdata->bss); 1030 1031 mutex_lock(&local->sta_mtx); 1032 list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { 1033 if (sdata == sta->sdata || 1034 (vlans && sdata->bss == sta->sdata->bss)) { 1035 if (!WARN_ON(__sta_info_destroy_part1(sta))) 1036 list_add(&sta->free_list, &free_list); 1037 ret++; 1038 } 1039 } 1040 1041 if (!list_empty(&free_list)) { 1042 synchronize_net(); 1043 list_for_each_entry_safe(sta, tmp, &free_list, free_list) 1044 __sta_info_destroy_part2(sta); 1045 } 1046 mutex_unlock(&local->sta_mtx); 1047 1048 return ret; 1049} 1050 1051void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, 1052 unsigned long exp_time) 1053{ 1054 struct ieee80211_local *local = sdata->local; 1055 struct sta_info *sta, *tmp; 1056 1057 mutex_lock(&local->sta_mtx); 1058 1059 list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { 1060 if (sdata != sta->sdata) 1061 continue; 1062 1063 if (time_after(jiffies, sta->last_rx + exp_time)) { 1064 sta_dbg(sta->sdata, "expiring inactive STA %pM\n", 1065 sta->sta.addr); 1066 1067 if (ieee80211_vif_is_mesh(&sdata->vif) && 1068 test_sta_flag(sta, WLAN_STA_PS_STA)) 1069 atomic_dec(&sdata->u.mesh.ps.num_sta_ps); 1070 1071 WARN_ON(__sta_info_destroy(sta)); 1072 } 1073 } 1074 1075 mutex_unlock(&local->sta_mtx); 1076} 1077 1078struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw, 1079 const u8 *addr, 1080 const u8 *localaddr) 1081{ 1082 struct ieee80211_local *local = hw_to_local(hw); 1083 struct sta_info *sta; 1084 struct rhash_head *tmp; 1085 const struct bucket_table *tbl; 1086 1087 tbl = rht_dereference_rcu(local->sta_hash.tbl, &local->sta_hash); 1088 1089 /* 1090 * Just return a random station if localaddr is NULL 1091 * ... first in list. 1092 */ 1093 for_each_sta_info(local, tbl, addr, sta, tmp) { 1094 if (localaddr && 1095 !ether_addr_equal(sta->sdata->vif.addr, localaddr)) 1096 continue; 1097 if (!sta->uploaded) 1098 return NULL; 1099 return &sta->sta; 1100 } 1101 1102 return NULL; 1103} 1104EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_ifaddr); 1105 1106struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif, 1107 const u8 *addr) 1108{ 1109 struct sta_info *sta; 1110 1111 if (!vif) 1112 return NULL; 1113 1114 sta = sta_info_get_bss(vif_to_sdata(vif), addr); 1115 if (!sta) 1116 return NULL; 1117 1118 if (!sta->uploaded) 1119 return NULL; 1120 1121 return &sta->sta; 1122} 1123EXPORT_SYMBOL(ieee80211_find_sta); 1124 1125/* powersave support code */ 1126void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta) 1127{ 1128 struct ieee80211_sub_if_data *sdata = sta->sdata; 1129 struct ieee80211_local *local = sdata->local; 1130 struct sk_buff_head pending; 1131 int filtered = 0, buffered = 0, ac, i; 1132 unsigned long flags; 1133 struct ps_data *ps; 1134 1135 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 1136 sdata = container_of(sdata->bss, struct ieee80211_sub_if_data, 1137 u.ap); 1138 1139 if (sdata->vif.type == NL80211_IFTYPE_AP) 1140 ps = &sdata->bss->ps; 1141 else if (ieee80211_vif_is_mesh(&sdata->vif)) 1142 ps = &sdata->u.mesh.ps; 1143 else 1144 return; 1145 1146 clear_sta_flag(sta, WLAN_STA_SP); 1147 1148 BUILD_BUG_ON(BITS_TO_LONGS(IEEE80211_NUM_TIDS) > 1); 1149 sta->driver_buffered_tids = 0; 1150 sta->txq_buffered_tids = 0; 1151 1152 if (!(local->hw.flags & IEEE80211_HW_AP_LINK_PS)) 1153 drv_sta_notify(local, sdata, STA_NOTIFY_AWAKE, &sta->sta); 1154 1155 if (sta->sta.txq[0]) { 1156 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) { 1157 struct txq_info *txqi = to_txq_info(sta->sta.txq[i]); 1158 1159 if (!skb_queue_len(&txqi->queue)) 1160 continue; 1161 1162 drv_wake_tx_queue(local, txqi); 1163 } 1164 } 1165 1166 skb_queue_head_init(&pending); 1167 1168 /* sync with ieee80211_tx_h_unicast_ps_buf */ 1169 spin_lock(&sta->ps_lock); 1170 /* Send all buffered frames to the station */ 1171 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1172 int count = skb_queue_len(&pending), tmp; 1173 1174 spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags); 1175 skb_queue_splice_tail_init(&sta->tx_filtered[ac], &pending); 1176 spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags); 1177 tmp = skb_queue_len(&pending); 1178 filtered += tmp - count; 1179 count = tmp; 1180 1181 spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags); 1182 skb_queue_splice_tail_init(&sta->ps_tx_buf[ac], &pending); 1183 spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags); 1184 tmp = skb_queue_len(&pending); 1185 buffered += tmp - count; 1186 } 1187 1188 ieee80211_add_pending_skbs(local, &pending); 1189 1190 /* now we're no longer in the deliver code */ 1191 clear_sta_flag(sta, WLAN_STA_PS_DELIVER); 1192 1193 /* The station might have polled and then woken up before we responded, 1194 * so clear these flags now to avoid them sticking around. 1195 */ 1196 clear_sta_flag(sta, WLAN_STA_PSPOLL); 1197 clear_sta_flag(sta, WLAN_STA_UAPSD); 1198 spin_unlock(&sta->ps_lock); 1199 1200 atomic_dec(&ps->num_sta_ps); 1201 1202 /* This station just woke up and isn't aware of our SMPS state */ 1203 if (!ieee80211_vif_is_mesh(&sdata->vif) && 1204 !ieee80211_smps_is_restrictive(sta->known_smps_mode, 1205 sdata->smps_mode) && 1206 sta->known_smps_mode != sdata->bss->req_smps && 1207 sta_info_tx_streams(sta) != 1) { 1208 ht_dbg(sdata, 1209 "%pM just woke up and MIMO capable - update SMPS\n", 1210 sta->sta.addr); 1211 ieee80211_send_smps_action(sdata, sdata->bss->req_smps, 1212 sta->sta.addr, 1213 sdata->vif.bss_conf.bssid); 1214 } 1215 1216 local->total_ps_buffered -= buffered; 1217 1218 sta_info_recalc_tim(sta); 1219 1220 ps_dbg(sdata, 1221 "STA %pM aid %d sending %d filtered/%d PS frames since STA not sleeping anymore\n", 1222 sta->sta.addr, sta->sta.aid, filtered, buffered); 1223} 1224 1225static void ieee80211_send_null_response(struct ieee80211_sub_if_data *sdata, 1226 struct sta_info *sta, int tid, 1227 enum ieee80211_frame_release_type reason, 1228 bool call_driver) 1229{ 1230 struct ieee80211_local *local = sdata->local; 1231 struct ieee80211_qos_hdr *nullfunc; 1232 struct sk_buff *skb; 1233 int size = sizeof(*nullfunc); 1234 __le16 fc; 1235 bool qos = sta->sta.wme; 1236 struct ieee80211_tx_info *info; 1237 struct ieee80211_chanctx_conf *chanctx_conf; 1238 1239 if (qos) { 1240 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | 1241 IEEE80211_STYPE_QOS_NULLFUNC | 1242 IEEE80211_FCTL_FROMDS); 1243 } else { 1244 size -= 2; 1245 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | 1246 IEEE80211_STYPE_NULLFUNC | 1247 IEEE80211_FCTL_FROMDS); 1248 } 1249 1250 skb = dev_alloc_skb(local->hw.extra_tx_headroom + size); 1251 if (!skb) 1252 return; 1253 1254 skb_reserve(skb, local->hw.extra_tx_headroom); 1255 1256 nullfunc = (void *) skb_put(skb, size); 1257 nullfunc->frame_control = fc; 1258 nullfunc->duration_id = 0; 1259 memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN); 1260 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 1261 memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN); 1262 nullfunc->seq_ctrl = 0; 1263 1264 skb->priority = tid; 1265 skb_set_queue_mapping(skb, ieee802_1d_to_ac[tid]); 1266 if (qos) { 1267 nullfunc->qos_ctrl = cpu_to_le16(tid); 1268 1269 if (reason == IEEE80211_FRAME_RELEASE_UAPSD) 1270 nullfunc->qos_ctrl |= 1271 cpu_to_le16(IEEE80211_QOS_CTL_EOSP); 1272 } 1273 1274 info = IEEE80211_SKB_CB(skb); 1275 1276 /* 1277 * Tell TX path to send this frame even though the 1278 * STA may still remain is PS mode after this frame 1279 * exchange. Also set EOSP to indicate this packet 1280 * ends the poll/service period. 1281 */ 1282 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER | 1283 IEEE80211_TX_STATUS_EOSP | 1284 IEEE80211_TX_CTL_REQ_TX_STATUS; 1285 1286 info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE; 1287 1288 if (call_driver) 1289 drv_allow_buffered_frames(local, sta, BIT(tid), 1, 1290 reason, false); 1291 1292 skb->dev = sdata->dev; 1293 1294 rcu_read_lock(); 1295 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 1296 if (WARN_ON(!chanctx_conf)) { 1297 rcu_read_unlock(); 1298 kfree_skb(skb); 1299 return; 1300 } 1301 1302 info->band = chanctx_conf->def.chan->band; 1303 ieee80211_xmit(sdata, sta, skb); 1304 rcu_read_unlock(); 1305} 1306 1307static int find_highest_prio_tid(unsigned long tids) 1308{ 1309 /* lower 3 TIDs aren't ordered perfectly */ 1310 if (tids & 0xF8) 1311 return fls(tids) - 1; 1312 /* TID 0 is BE just like TID 3 */ 1313 if (tids & BIT(0)) 1314 return 0; 1315 return fls(tids) - 1; 1316} 1317 1318static void 1319ieee80211_sta_ps_deliver_response(struct sta_info *sta, 1320 int n_frames, u8 ignored_acs, 1321 enum ieee80211_frame_release_type reason) 1322{ 1323 struct ieee80211_sub_if_data *sdata = sta->sdata; 1324 struct ieee80211_local *local = sdata->local; 1325 bool more_data = false; 1326 int ac; 1327 unsigned long driver_release_tids = 0; 1328 struct sk_buff_head frames; 1329 1330 /* Service or PS-Poll period starts */ 1331 set_sta_flag(sta, WLAN_STA_SP); 1332 1333 __skb_queue_head_init(&frames); 1334 1335 /* Get response frame(s) and more data bit for the last one. */ 1336 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1337 unsigned long tids; 1338 1339 if (ignored_acs & BIT(ac)) 1340 continue; 1341 1342 tids = ieee80211_tids_for_ac(ac); 1343 1344 /* if we already have frames from software, then we can't also 1345 * release from hardware queues 1346 */ 1347 if (skb_queue_empty(&frames)) { 1348 driver_release_tids |= sta->driver_buffered_tids & tids; 1349 driver_release_tids |= sta->txq_buffered_tids & tids; 1350 } 1351 1352 if (driver_release_tids) { 1353 /* If the driver has data on more than one TID then 1354 * certainly there's more data if we release just a 1355 * single frame now (from a single TID). This will 1356 * only happen for PS-Poll. 1357 */ 1358 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL && 1359 hweight16(driver_release_tids) > 1) { 1360 more_data = true; 1361 driver_release_tids = 1362 BIT(find_highest_prio_tid( 1363 driver_release_tids)); 1364 break; 1365 } 1366 } else { 1367 struct sk_buff *skb; 1368 1369 while (n_frames > 0) { 1370 skb = skb_dequeue(&sta->tx_filtered[ac]); 1371 if (!skb) { 1372 skb = skb_dequeue( 1373 &sta->ps_tx_buf[ac]); 1374 if (skb) 1375 local->total_ps_buffered--; 1376 } 1377 if (!skb) 1378 break; 1379 n_frames--; 1380 __skb_queue_tail(&frames, skb); 1381 } 1382 } 1383 1384 /* If we have more frames buffered on this AC, then set the 1385 * more-data bit and abort the loop since we can't send more 1386 * data from other ACs before the buffered frames from this. 1387 */ 1388 if (!skb_queue_empty(&sta->tx_filtered[ac]) || 1389 !skb_queue_empty(&sta->ps_tx_buf[ac])) { 1390 more_data = true; 1391 break; 1392 } 1393 } 1394 1395 if (skb_queue_empty(&frames) && !driver_release_tids) { 1396 int tid; 1397 1398 /* 1399 * For PS-Poll, this can only happen due to a race condition 1400 * when we set the TIM bit and the station notices it, but 1401 * before it can poll for the frame we expire it. 1402 * 1403 * For uAPSD, this is said in the standard (11.2.1.5 h): 1404 * At each unscheduled SP for a non-AP STA, the AP shall 1405 * attempt to transmit at least one MSDU or MMPDU, but no 1406 * more than the value specified in the Max SP Length field 1407 * in the QoS Capability element from delivery-enabled ACs, 1408 * that are destined for the non-AP STA. 1409 * 1410 * Since we have no other MSDU/MMPDU, transmit a QoS null frame. 1411 */ 1412 1413 /* This will evaluate to 1, 3, 5 or 7. */ 1414 tid = 7 - ((ffs(~ignored_acs) - 1) << 1); 1415 1416 ieee80211_send_null_response(sdata, sta, tid, reason, true); 1417 } else if (!driver_release_tids) { 1418 struct sk_buff_head pending; 1419 struct sk_buff *skb; 1420 int num = 0; 1421 u16 tids = 0; 1422 bool need_null = false; 1423 1424 skb_queue_head_init(&pending); 1425 1426 while ((skb = __skb_dequeue(&frames))) { 1427 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1428 struct ieee80211_hdr *hdr = (void *) skb->data; 1429 u8 *qoshdr = NULL; 1430 1431 num++; 1432 1433 /* 1434 * Tell TX path to send this frame even though the 1435 * STA may still remain is PS mode after this frame 1436 * exchange. 1437 */ 1438 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER; 1439 info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE; 1440 1441 /* 1442 * Use MoreData flag to indicate whether there are 1443 * more buffered frames for this STA 1444 */ 1445 if (more_data || !skb_queue_empty(&frames)) 1446 hdr->frame_control |= 1447 cpu_to_le16(IEEE80211_FCTL_MOREDATA); 1448 else 1449 hdr->frame_control &= 1450 cpu_to_le16(~IEEE80211_FCTL_MOREDATA); 1451 1452 if (ieee80211_is_data_qos(hdr->frame_control) || 1453 ieee80211_is_qos_nullfunc(hdr->frame_control)) 1454 qoshdr = ieee80211_get_qos_ctl(hdr); 1455 1456 tids |= BIT(skb->priority); 1457 1458 __skb_queue_tail(&pending, skb); 1459 1460 /* end service period after last frame or add one */ 1461 if (!skb_queue_empty(&frames)) 1462 continue; 1463 1464 if (reason != IEEE80211_FRAME_RELEASE_UAPSD) { 1465 /* for PS-Poll, there's only one frame */ 1466 info->flags |= IEEE80211_TX_STATUS_EOSP | 1467 IEEE80211_TX_CTL_REQ_TX_STATUS; 1468 break; 1469 } 1470 1471 /* For uAPSD, things are a bit more complicated. If the 1472 * last frame has a QoS header (i.e. is a QoS-data or 1473 * QoS-nulldata frame) then just set the EOSP bit there 1474 * and be done. 1475 * If the frame doesn't have a QoS header (which means 1476 * it should be a bufferable MMPDU) then we can't set 1477 * the EOSP bit in the QoS header; add a QoS-nulldata 1478 * frame to the list to send it after the MMPDU. 1479 * 1480 * Note that this code is only in the mac80211-release 1481 * code path, we assume that the driver will not buffer 1482 * anything but QoS-data frames, or if it does, will 1483 * create the QoS-nulldata frame by itself if needed. 1484 * 1485 * Cf. 802.11-2012 10.2.1.10 (c). 1486 */ 1487 if (qoshdr) { 1488 *qoshdr |= IEEE80211_QOS_CTL_EOSP; 1489 1490 info->flags |= IEEE80211_TX_STATUS_EOSP | 1491 IEEE80211_TX_CTL_REQ_TX_STATUS; 1492 } else { 1493 /* The standard isn't completely clear on this 1494 * as it says the more-data bit should be set 1495 * if there are more BUs. The QoS-Null frame 1496 * we're about to send isn't buffered yet, we 1497 * only create it below, but let's pretend it 1498 * was buffered just in case some clients only 1499 * expect more-data=0 when eosp=1. 1500 */ 1501 hdr->frame_control |= 1502 cpu_to_le16(IEEE80211_FCTL_MOREDATA); 1503 need_null = true; 1504 num++; 1505 } 1506 break; 1507 } 1508 1509 drv_allow_buffered_frames(local, sta, tids, num, 1510 reason, more_data); 1511 1512 ieee80211_add_pending_skbs(local, &pending); 1513 1514 if (need_null) 1515 ieee80211_send_null_response( 1516 sdata, sta, find_highest_prio_tid(tids), 1517 reason, false); 1518 1519 sta_info_recalc_tim(sta); 1520 } else { 1521 unsigned long tids = sta->txq_buffered_tids & driver_release_tids; 1522 int tid; 1523 1524 /* 1525 * We need to release a frame that is buffered somewhere in the 1526 * driver ... it'll have to handle that. 1527 * Note that the driver also has to check the number of frames 1528 * on the TIDs we're releasing from - if there are more than 1529 * n_frames it has to set the more-data bit (if we didn't ask 1530 * it to set it anyway due to other buffered frames); if there 1531 * are fewer than n_frames it has to make sure to adjust that 1532 * to allow the service period to end properly. 1533 */ 1534 drv_release_buffered_frames(local, sta, driver_release_tids, 1535 n_frames, reason, more_data); 1536 1537 /* 1538 * Note that we don't recalculate the TIM bit here as it would 1539 * most likely have no effect at all unless the driver told us 1540 * that the TID(s) became empty before returning here from the 1541 * release function. 1542 * Either way, however, when the driver tells us that the TID(s) 1543 * became empty or we find that a txq became empty, we'll do the 1544 * TIM recalculation. 1545 */ 1546 1547 if (!sta->sta.txq[0]) 1548 return; 1549 1550 for (tid = 0; tid < ARRAY_SIZE(sta->sta.txq); tid++) { 1551 struct txq_info *txqi = to_txq_info(sta->sta.txq[tid]); 1552 1553 if (!(tids & BIT(tid)) || skb_queue_len(&txqi->queue)) 1554 continue; 1555 1556 sta_info_recalc_tim(sta); 1557 break; 1558 } 1559 } 1560} 1561 1562void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta) 1563{ 1564 u8 ignore_for_response = sta->sta.uapsd_queues; 1565 1566 /* 1567 * If all ACs are delivery-enabled then we should reply 1568 * from any of them, if only some are enabled we reply 1569 * only from the non-enabled ones. 1570 */ 1571 if (ignore_for_response == BIT(IEEE80211_NUM_ACS) - 1) 1572 ignore_for_response = 0; 1573 1574 ieee80211_sta_ps_deliver_response(sta, 1, ignore_for_response, 1575 IEEE80211_FRAME_RELEASE_PSPOLL); 1576} 1577 1578void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta) 1579{ 1580 int n_frames = sta->sta.max_sp; 1581 u8 delivery_enabled = sta->sta.uapsd_queues; 1582 1583 /* 1584 * If we ever grow support for TSPEC this might happen if 1585 * the TSPEC update from hostapd comes in between a trigger 1586 * frame setting WLAN_STA_UAPSD in the RX path and this 1587 * actually getting called. 1588 */ 1589 if (!delivery_enabled) 1590 return; 1591 1592 switch (sta->sta.max_sp) { 1593 case 1: 1594 n_frames = 2; 1595 break; 1596 case 2: 1597 n_frames = 4; 1598 break; 1599 case 3: 1600 n_frames = 6; 1601 break; 1602 case 0: 1603 /* XXX: what is a good value? */ 1604 n_frames = 128; 1605 break; 1606 } 1607 1608 ieee80211_sta_ps_deliver_response(sta, n_frames, ~delivery_enabled, 1609 IEEE80211_FRAME_RELEASE_UAPSD); 1610} 1611 1612void ieee80211_sta_block_awake(struct ieee80211_hw *hw, 1613 struct ieee80211_sta *pubsta, bool block) 1614{ 1615 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 1616 1617 trace_api_sta_block_awake(sta->local, pubsta, block); 1618 1619 if (block) { 1620 set_sta_flag(sta, WLAN_STA_PS_DRIVER); 1621 return; 1622 } 1623 1624 if (!test_sta_flag(sta, WLAN_STA_PS_DRIVER)) 1625 return; 1626 1627 if (!test_sta_flag(sta, WLAN_STA_PS_STA)) { 1628 set_sta_flag(sta, WLAN_STA_PS_DELIVER); 1629 clear_sta_flag(sta, WLAN_STA_PS_DRIVER); 1630 ieee80211_queue_work(hw, &sta->drv_deliver_wk); 1631 } else if (test_sta_flag(sta, WLAN_STA_PSPOLL) || 1632 test_sta_flag(sta, WLAN_STA_UAPSD)) { 1633 /* must be asleep in this case */ 1634 clear_sta_flag(sta, WLAN_STA_PS_DRIVER); 1635 ieee80211_queue_work(hw, &sta->drv_deliver_wk); 1636 } else { 1637 clear_sta_flag(sta, WLAN_STA_PS_DRIVER); 1638 } 1639} 1640EXPORT_SYMBOL(ieee80211_sta_block_awake); 1641 1642void ieee80211_sta_eosp(struct ieee80211_sta *pubsta) 1643{ 1644 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 1645 struct ieee80211_local *local = sta->local; 1646 1647 trace_api_eosp(local, pubsta); 1648 1649 clear_sta_flag(sta, WLAN_STA_SP); 1650} 1651EXPORT_SYMBOL(ieee80211_sta_eosp); 1652 1653void ieee80211_sta_set_buffered(struct ieee80211_sta *pubsta, 1654 u8 tid, bool buffered) 1655{ 1656 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 1657 1658 if (WARN_ON(tid >= IEEE80211_NUM_TIDS)) 1659 return; 1660 1661 trace_api_sta_set_buffered(sta->local, pubsta, tid, buffered); 1662 1663 if (buffered) 1664 set_bit(tid, &sta->driver_buffered_tids); 1665 else 1666 clear_bit(tid, &sta->driver_buffered_tids); 1667 1668 sta_info_recalc_tim(sta); 1669} 1670EXPORT_SYMBOL(ieee80211_sta_set_buffered); 1671 1672int sta_info_move_state(struct sta_info *sta, 1673 enum ieee80211_sta_state new_state) 1674{ 1675 might_sleep(); 1676 1677 if (sta->sta_state == new_state) 1678 return 0; 1679 1680 /* check allowed transitions first */ 1681 1682 switch (new_state) { 1683 case IEEE80211_STA_NONE: 1684 if (sta->sta_state != IEEE80211_STA_AUTH) 1685 return -EINVAL; 1686 break; 1687 case IEEE80211_STA_AUTH: 1688 if (sta->sta_state != IEEE80211_STA_NONE && 1689 sta->sta_state != IEEE80211_STA_ASSOC) 1690 return -EINVAL; 1691 break; 1692 case IEEE80211_STA_ASSOC: 1693 if (sta->sta_state != IEEE80211_STA_AUTH && 1694 sta->sta_state != IEEE80211_STA_AUTHORIZED) 1695 return -EINVAL; 1696 break; 1697 case IEEE80211_STA_AUTHORIZED: 1698 if (sta->sta_state != IEEE80211_STA_ASSOC) 1699 return -EINVAL; 1700 break; 1701 default: 1702 WARN(1, "invalid state %d", new_state); 1703 return -EINVAL; 1704 } 1705 1706 sta_dbg(sta->sdata, "moving STA %pM to state %d\n", 1707 sta->sta.addr, new_state); 1708 1709 /* 1710 * notify the driver before the actual changes so it can 1711 * fail the transition 1712 */ 1713 if (test_sta_flag(sta, WLAN_STA_INSERTED)) { 1714 int err = drv_sta_state(sta->local, sta->sdata, sta, 1715 sta->sta_state, new_state); 1716 if (err) 1717 return err; 1718 } 1719 1720 /* reflect the change in all state variables */ 1721 1722 switch (new_state) { 1723 case IEEE80211_STA_NONE: 1724 if (sta->sta_state == IEEE80211_STA_AUTH) 1725 clear_bit(WLAN_STA_AUTH, &sta->_flags); 1726 break; 1727 case IEEE80211_STA_AUTH: 1728 if (sta->sta_state == IEEE80211_STA_NONE) 1729 set_bit(WLAN_STA_AUTH, &sta->_flags); 1730 else if (sta->sta_state == IEEE80211_STA_ASSOC) 1731 clear_bit(WLAN_STA_ASSOC, &sta->_flags); 1732 break; 1733 case IEEE80211_STA_ASSOC: 1734 if (sta->sta_state == IEEE80211_STA_AUTH) { 1735 set_bit(WLAN_STA_ASSOC, &sta->_flags); 1736 } else if (sta->sta_state == IEEE80211_STA_AUTHORIZED) { 1737 if (sta->sdata->vif.type == NL80211_IFTYPE_AP || 1738 (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && 1739 !sta->sdata->u.vlan.sta)) 1740 atomic_dec(&sta->sdata->bss->num_mcast_sta); 1741 clear_bit(WLAN_STA_AUTHORIZED, &sta->_flags); 1742 } 1743 break; 1744 case IEEE80211_STA_AUTHORIZED: 1745 if (sta->sta_state == IEEE80211_STA_ASSOC) { 1746 if (sta->sdata->vif.type == NL80211_IFTYPE_AP || 1747 (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && 1748 !sta->sdata->u.vlan.sta)) 1749 atomic_inc(&sta->sdata->bss->num_mcast_sta); 1750 set_bit(WLAN_STA_AUTHORIZED, &sta->_flags); 1751 } 1752 break; 1753 default: 1754 break; 1755 } 1756 1757 sta->sta_state = new_state; 1758 1759 return 0; 1760} 1761 1762u8 sta_info_tx_streams(struct sta_info *sta) 1763{ 1764 struct ieee80211_sta_ht_cap *ht_cap = &sta->sta.ht_cap; 1765 u8 rx_streams; 1766 1767 if (!sta->sta.ht_cap.ht_supported) 1768 return 1; 1769 1770 if (sta->sta.vht_cap.vht_supported) { 1771 int i; 1772 u16 tx_mcs_map = 1773 le16_to_cpu(sta->sta.vht_cap.vht_mcs.tx_mcs_map); 1774 1775 for (i = 7; i >= 0; i--) 1776 if ((tx_mcs_map & (0x3 << (i * 2))) != 1777 IEEE80211_VHT_MCS_NOT_SUPPORTED) 1778 return i + 1; 1779 } 1780 1781 if (ht_cap->mcs.rx_mask[3]) 1782 rx_streams = 4; 1783 else if (ht_cap->mcs.rx_mask[2]) 1784 rx_streams = 3; 1785 else if (ht_cap->mcs.rx_mask[1]) 1786 rx_streams = 2; 1787 else 1788 rx_streams = 1; 1789 1790 if (!(ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_RX_DIFF)) 1791 return rx_streams; 1792 1793 return ((ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK) 1794 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT) + 1; 1795} 1796 1797void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo) 1798{ 1799 struct ieee80211_sub_if_data *sdata = sta->sdata; 1800 struct ieee80211_local *local = sdata->local; 1801 struct rate_control_ref *ref = NULL; 1802 struct timespec uptime; 1803 u32 thr = 0; 1804 int i, ac; 1805 1806 if (test_sta_flag(sta, WLAN_STA_RATE_CONTROL)) 1807 ref = local->rate_ctrl; 1808 1809 sinfo->generation = sdata->local->sta_generation; 1810 1811 /* do before driver, so beacon filtering drivers have a 1812 * chance to e.g. just add the number of filtered beacons 1813 * (or just modify the value entirely, of course) 1814 */ 1815 if (sdata->vif.type == NL80211_IFTYPE_STATION) 1816 sinfo->rx_beacon = sdata->u.mgd.count_beacon_signal; 1817 1818 drv_sta_statistics(local, sdata, &sta->sta, sinfo); 1819 1820 sinfo->filled |= BIT(NL80211_STA_INFO_INACTIVE_TIME) | 1821 BIT(NL80211_STA_INFO_STA_FLAGS) | 1822 BIT(NL80211_STA_INFO_BSS_PARAM) | 1823 BIT(NL80211_STA_INFO_CONNECTED_TIME) | 1824 BIT(NL80211_STA_INFO_RX_DROP_MISC) | 1825 BIT(NL80211_STA_INFO_BEACON_LOSS); 1826 1827 ktime_get_ts(&uptime); 1828 sinfo->connected_time = uptime.tv_sec - sta->last_connected; 1829 sinfo->inactive_time = jiffies_to_msecs(jiffies - sta->last_rx); 1830 1831 if (!(sinfo->filled & (BIT(NL80211_STA_INFO_TX_BYTES64) | 1832 BIT(NL80211_STA_INFO_TX_BYTES)))) { 1833 sinfo->tx_bytes = 0; 1834 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 1835 sinfo->tx_bytes += sta->tx_bytes[ac]; 1836 sinfo->filled |= BIT(NL80211_STA_INFO_TX_BYTES64); 1837 } 1838 1839 if (!(sinfo->filled & BIT(NL80211_STA_INFO_TX_PACKETS))) { 1840 sinfo->tx_packets = 0; 1841 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 1842 sinfo->tx_packets += sta->tx_packets[ac]; 1843 sinfo->filled |= BIT(NL80211_STA_INFO_TX_PACKETS); 1844 } 1845 1846 if (!(sinfo->filled & (BIT(NL80211_STA_INFO_RX_BYTES64) | 1847 BIT(NL80211_STA_INFO_RX_BYTES)))) { 1848 sinfo->rx_bytes = sta->rx_bytes; 1849 sinfo->filled |= BIT(NL80211_STA_INFO_RX_BYTES64); 1850 } 1851 1852 if (!(sinfo->filled & BIT(NL80211_STA_INFO_RX_PACKETS))) { 1853 sinfo->rx_packets = sta->rx_packets; 1854 sinfo->filled |= BIT(NL80211_STA_INFO_RX_PACKETS); 1855 } 1856 1857 if (!(sinfo->filled & BIT(NL80211_STA_INFO_TX_RETRIES))) { 1858 sinfo->tx_retries = sta->tx_retry_count; 1859 sinfo->filled |= BIT(NL80211_STA_INFO_TX_RETRIES); 1860 } 1861 1862 if (!(sinfo->filled & BIT(NL80211_STA_INFO_TX_FAILED))) { 1863 sinfo->tx_failed = sta->tx_retry_failed; 1864 sinfo->filled |= BIT(NL80211_STA_INFO_TX_FAILED); 1865 } 1866 1867 sinfo->rx_dropped_misc = sta->rx_dropped; 1868 sinfo->beacon_loss_count = sta->beacon_loss_count; 1869 1870 if (sdata->vif.type == NL80211_IFTYPE_STATION && 1871 !(sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)) { 1872 sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_RX) | 1873 BIT(NL80211_STA_INFO_BEACON_SIGNAL_AVG); 1874 sinfo->rx_beacon_signal_avg = ieee80211_ave_rssi(&sdata->vif); 1875 } 1876 1877 if ((sta->local->hw.flags & IEEE80211_HW_SIGNAL_DBM) || 1878 (sta->local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)) { 1879 if (!(sinfo->filled & BIT(NL80211_STA_INFO_SIGNAL))) { 1880 sinfo->signal = (s8)sta->last_signal; 1881 sinfo->filled |= BIT(NL80211_STA_INFO_SIGNAL); 1882 } 1883 1884 if (!(sinfo->filled & BIT(NL80211_STA_INFO_SIGNAL_AVG))) { 1885 sinfo->signal_avg = (s8) -ewma_read(&sta->avg_signal); 1886 sinfo->filled |= BIT(NL80211_STA_INFO_SIGNAL_AVG); 1887 } 1888 } 1889 1890 if (sta->chains && 1891 !(sinfo->filled & (BIT(NL80211_STA_INFO_CHAIN_SIGNAL) | 1892 BIT(NL80211_STA_INFO_CHAIN_SIGNAL_AVG)))) { 1893 sinfo->filled |= BIT(NL80211_STA_INFO_CHAIN_SIGNAL) | 1894 BIT(NL80211_STA_INFO_CHAIN_SIGNAL_AVG); 1895 1896 sinfo->chains = sta->chains; 1897 for (i = 0; i < ARRAY_SIZE(sinfo->chain_signal); i++) { 1898 sinfo->chain_signal[i] = sta->chain_signal_last[i]; 1899 sinfo->chain_signal_avg[i] = 1900 (s8) -ewma_read(&sta->chain_signal_avg[i]); 1901 } 1902 } 1903 1904 if (!(sinfo->filled & BIT(NL80211_STA_INFO_TX_BITRATE))) { 1905 sta_set_rate_info_tx(sta, &sta->last_tx_rate, &sinfo->txrate); 1906 sinfo->filled |= BIT(NL80211_STA_INFO_TX_BITRATE); 1907 } 1908 1909 if (!(sinfo->filled & BIT(NL80211_STA_INFO_RX_BITRATE))) { 1910 sta_set_rate_info_rx(sta, &sinfo->rxrate); 1911 sinfo->filled |= BIT(NL80211_STA_INFO_RX_BITRATE); 1912 } 1913 1914 sinfo->filled |= BIT(NL80211_STA_INFO_TID_STATS); 1915 for (i = 0; i < IEEE80211_NUM_TIDS + 1; i++) { 1916 struct cfg80211_tid_stats *tidstats = &sinfo->pertid[i]; 1917 1918 if (!(tidstats->filled & BIT(NL80211_TID_STATS_RX_MSDU))) { 1919 tidstats->filled |= BIT(NL80211_TID_STATS_RX_MSDU); 1920 tidstats->rx_msdu = sta->rx_msdu[i]; 1921 } 1922 1923 if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU))) { 1924 tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU); 1925 tidstats->tx_msdu = sta->tx_msdu[i]; 1926 } 1927 1928 if (!(tidstats->filled & 1929 BIT(NL80211_TID_STATS_TX_MSDU_RETRIES)) && 1930 local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) { 1931 tidstats->filled |= 1932 BIT(NL80211_TID_STATS_TX_MSDU_RETRIES); 1933 tidstats->tx_msdu_retries = sta->tx_msdu_retries[i]; 1934 } 1935 1936 if (!(tidstats->filled & 1937 BIT(NL80211_TID_STATS_TX_MSDU_FAILED)) && 1938 local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) { 1939 tidstats->filled |= 1940 BIT(NL80211_TID_STATS_TX_MSDU_FAILED); 1941 tidstats->tx_msdu_failed = sta->tx_msdu_failed[i]; 1942 } 1943 } 1944 1945 if (ieee80211_vif_is_mesh(&sdata->vif)) { 1946#ifdef CONFIG_MAC80211_MESH 1947 sinfo->filled |= BIT(NL80211_STA_INFO_LLID) | 1948 BIT(NL80211_STA_INFO_PLID) | 1949 BIT(NL80211_STA_INFO_PLINK_STATE) | 1950 BIT(NL80211_STA_INFO_LOCAL_PM) | 1951 BIT(NL80211_STA_INFO_PEER_PM) | 1952 BIT(NL80211_STA_INFO_NONPEER_PM); 1953 1954 sinfo->llid = sta->llid; 1955 sinfo->plid = sta->plid; 1956 sinfo->plink_state = sta->plink_state; 1957 if (test_sta_flag(sta, WLAN_STA_TOFFSET_KNOWN)) { 1958 sinfo->filled |= BIT(NL80211_STA_INFO_T_OFFSET); 1959 sinfo->t_offset = sta->t_offset; 1960 } 1961 sinfo->local_pm = sta->local_pm; 1962 sinfo->peer_pm = sta->peer_pm; 1963 sinfo->nonpeer_pm = sta->nonpeer_pm; 1964#endif 1965 } 1966 1967 sinfo->bss_param.flags = 0; 1968 if (sdata->vif.bss_conf.use_cts_prot) 1969 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_CTS_PROT; 1970 if (sdata->vif.bss_conf.use_short_preamble) 1971 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_PREAMBLE; 1972 if (sdata->vif.bss_conf.use_short_slot) 1973 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_SLOT_TIME; 1974 sinfo->bss_param.dtim_period = sdata->vif.bss_conf.dtim_period; 1975 sinfo->bss_param.beacon_interval = sdata->vif.bss_conf.beacon_int; 1976 1977 sinfo->sta_flags.set = 0; 1978 sinfo->sta_flags.mask = BIT(NL80211_STA_FLAG_AUTHORIZED) | 1979 BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) | 1980 BIT(NL80211_STA_FLAG_WME) | 1981 BIT(NL80211_STA_FLAG_MFP) | 1982 BIT(NL80211_STA_FLAG_AUTHENTICATED) | 1983 BIT(NL80211_STA_FLAG_ASSOCIATED) | 1984 BIT(NL80211_STA_FLAG_TDLS_PEER); 1985 if (test_sta_flag(sta, WLAN_STA_AUTHORIZED)) 1986 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHORIZED); 1987 if (test_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE)) 1988 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE); 1989 if (sta->sta.wme) 1990 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_WME); 1991 if (test_sta_flag(sta, WLAN_STA_MFP)) 1992 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_MFP); 1993 if (test_sta_flag(sta, WLAN_STA_AUTH)) 1994 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHENTICATED); 1995 if (test_sta_flag(sta, WLAN_STA_ASSOC)) 1996 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_ASSOCIATED); 1997 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER)) 1998 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_TDLS_PEER); 1999 2000 /* check if the driver has a SW RC implementation */ 2001 if (ref && ref->ops->get_expected_throughput) 2002 thr = ref->ops->get_expected_throughput(sta->rate_ctrl_priv); 2003 else 2004 thr = drv_get_expected_throughput(local, &sta->sta); 2005 2006 if (thr != 0) { 2007 sinfo->filled |= BIT(NL80211_STA_INFO_EXPECTED_THROUGHPUT); 2008 sinfo->expected_throughput = thr; 2009 } 2010} 2011