1// SPDX-License-Identifier: GPL-2.0-only 2/* 3 * Copyright 2002-2005, Instant802 Networks, Inc. 4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 5 * Copyright 2013-2014 Intel Mobile Communications GmbH 6 * Copyright (C) 2015 - 2017 Intel Deutschland GmbH 7 * Copyright (C) 2018-2023 Intel Corporation 8 */ 9 10#include <linux/module.h> 11#include <linux/init.h> 12#include <linux/etherdevice.h> 13#include <linux/netdevice.h> 14#include <linux/types.h> 15#include <linux/slab.h> 16#include <linux/skbuff.h> 17#include <linux/if_arp.h> 18#include <linux/timer.h> 19#include <linux/rtnetlink.h> 20 21#include <net/codel.h> 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 67struct sta_link_alloc { 68 struct link_sta_info info; 69 struct ieee80211_link_sta sta; 70 struct rcu_head rcu_head; 71}; 72 73static const struct rhashtable_params sta_rht_params = { 74 .nelem_hint = 3, /* start small */ 75 .automatic_shrinking = true, 76 .head_offset = offsetof(struct sta_info, hash_node), 77 .key_offset = offsetof(struct sta_info, addr), 78 .key_len = ETH_ALEN, 79 .max_size = CONFIG_MAC80211_STA_HASH_MAX_SIZE, 80}; 81 82static const struct rhashtable_params link_sta_rht_params = { 83 .nelem_hint = 3, /* start small */ 84 .automatic_shrinking = true, 85 .head_offset = offsetof(struct link_sta_info, link_hash_node), 86 .key_offset = offsetof(struct link_sta_info, addr), 87 .key_len = ETH_ALEN, 88 .max_size = CONFIG_MAC80211_STA_HASH_MAX_SIZE, 89}; 90 91/* Caller must hold local->sta_mtx */ 92static int sta_info_hash_del(struct ieee80211_local *local, 93 struct sta_info *sta) 94{ 95 return rhltable_remove(&local->sta_hash, &sta->hash_node, 96 sta_rht_params); 97} 98 99static int link_sta_info_hash_add(struct ieee80211_local *local, 100 struct link_sta_info *link_sta) 101{ 102 lockdep_assert_held(&local->sta_mtx); 103 return rhltable_insert(&local->link_sta_hash, 104 &link_sta->link_hash_node, 105 link_sta_rht_params); 106} 107 108static int link_sta_info_hash_del(struct ieee80211_local *local, 109 struct link_sta_info *link_sta) 110{ 111 lockdep_assert_held(&local->sta_mtx); 112 return rhltable_remove(&local->link_sta_hash, 113 &link_sta->link_hash_node, 114 link_sta_rht_params); 115} 116 117static void __cleanup_single_sta(struct sta_info *sta) 118{ 119 int ac, i; 120 struct tid_ampdu_tx *tid_tx; 121 struct ieee80211_sub_if_data *sdata = sta->sdata; 122 struct ieee80211_local *local = sdata->local; 123 struct ps_data *ps; 124 125 if (test_sta_flag(sta, WLAN_STA_PS_STA) || 126 test_sta_flag(sta, WLAN_STA_PS_DRIVER) || 127 test_sta_flag(sta, WLAN_STA_PS_DELIVER)) { 128 if (sta->sdata->vif.type == NL80211_IFTYPE_AP || 129 sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 130 ps = &sdata->bss->ps; 131 else if (ieee80211_vif_is_mesh(&sdata->vif)) 132 ps = &sdata->u.mesh.ps; 133 else 134 return; 135 136 clear_sta_flag(sta, WLAN_STA_PS_STA); 137 clear_sta_flag(sta, WLAN_STA_PS_DRIVER); 138 clear_sta_flag(sta, WLAN_STA_PS_DELIVER); 139 140 atomic_dec(&ps->num_sta_ps); 141 } 142 143 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) { 144 struct txq_info *txqi; 145 146 if (!sta->sta.txq[i]) 147 continue; 148 149 txqi = to_txq_info(sta->sta.txq[i]); 150 151 ieee80211_txq_purge(local, txqi); 152 } 153 154 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 155 local->total_ps_buffered -= skb_queue_len(&sta->ps_tx_buf[ac]); 156 ieee80211_purge_tx_queue(&local->hw, &sta->ps_tx_buf[ac]); 157 ieee80211_purge_tx_queue(&local->hw, &sta->tx_filtered[ac]); 158 } 159 160 if (ieee80211_vif_is_mesh(&sdata->vif)) 161 mesh_sta_cleanup(sta); 162 163 cancel_work_sync(&sta->drv_deliver_wk); 164 165 /* 166 * Destroy aggregation state here. It would be nice to wait for the 167 * driver to finish aggregation stop and then clean up, but for now 168 * drivers have to handle aggregation stop being requested, followed 169 * directly by station destruction. 170 */ 171 for (i = 0; i < IEEE80211_NUM_TIDS; i++) { 172 kfree(sta->ampdu_mlme.tid_start_tx[i]); 173 tid_tx = rcu_dereference_raw(sta->ampdu_mlme.tid_tx[i]); 174 if (!tid_tx) 175 continue; 176 ieee80211_purge_tx_queue(&local->hw, &tid_tx->pending); 177 kfree(tid_tx); 178 } 179} 180 181static void cleanup_single_sta(struct sta_info *sta) 182{ 183 struct ieee80211_sub_if_data *sdata = sta->sdata; 184 struct ieee80211_local *local = sdata->local; 185 186 __cleanup_single_sta(sta); 187 sta_info_free(local, sta); 188} 189 190struct rhlist_head *sta_info_hash_lookup(struct ieee80211_local *local, 191 const u8 *addr) 192{ 193 return rhltable_lookup(&local->sta_hash, addr, sta_rht_params); 194} 195 196/* protected by RCU */ 197struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata, 198 const u8 *addr) 199{ 200 struct ieee80211_local *local = sdata->local; 201 struct rhlist_head *tmp; 202 struct sta_info *sta; 203 204 rcu_read_lock(); 205 for_each_sta_info(local, addr, sta, tmp) { 206 if (sta->sdata == sdata) { 207 rcu_read_unlock(); 208 /* this is safe as the caller must already hold 209 * another rcu read section or the mutex 210 */ 211 return sta; 212 } 213 } 214 rcu_read_unlock(); 215 return NULL; 216} 217 218/* 219 * Get sta info either from the specified interface 220 * or from one of its vlans 221 */ 222struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata, 223 const u8 *addr) 224{ 225 struct ieee80211_local *local = sdata->local; 226 struct rhlist_head *tmp; 227 struct sta_info *sta; 228 229 rcu_read_lock(); 230 for_each_sta_info(local, addr, sta, tmp) { 231 if (sta->sdata == sdata || 232 (sta->sdata->bss && sta->sdata->bss == sdata->bss)) { 233 rcu_read_unlock(); 234 /* this is safe as the caller must already hold 235 * another rcu read section or the mutex 236 */ 237 return sta; 238 } 239 } 240 rcu_read_unlock(); 241 return NULL; 242} 243 244struct rhlist_head *link_sta_info_hash_lookup(struct ieee80211_local *local, 245 const u8 *addr) 246{ 247 return rhltable_lookup(&local->link_sta_hash, addr, 248 link_sta_rht_params); 249} 250 251struct link_sta_info * 252link_sta_info_get_bss(struct ieee80211_sub_if_data *sdata, const u8 *addr) 253{ 254 struct ieee80211_local *local = sdata->local; 255 struct rhlist_head *tmp; 256 struct link_sta_info *link_sta; 257 258 rcu_read_lock(); 259 for_each_link_sta_info(local, addr, link_sta, tmp) { 260 struct sta_info *sta = link_sta->sta; 261 262 if (sta->sdata == sdata || 263 (sta->sdata->bss && sta->sdata->bss == sdata->bss)) { 264 rcu_read_unlock(); 265 /* this is safe as the caller must already hold 266 * another rcu read section or the mutex 267 */ 268 return link_sta; 269 } 270 } 271 rcu_read_unlock(); 272 return NULL; 273} 274 275struct ieee80211_sta * 276ieee80211_find_sta_by_link_addrs(struct ieee80211_hw *hw, 277 const u8 *addr, 278 const u8 *localaddr, 279 unsigned int *link_id) 280{ 281 struct ieee80211_local *local = hw_to_local(hw); 282 struct link_sta_info *link_sta; 283 struct rhlist_head *tmp; 284 285 for_each_link_sta_info(local, addr, link_sta, tmp) { 286 struct sta_info *sta = link_sta->sta; 287 struct ieee80211_link_data *link; 288 u8 _link_id = link_sta->link_id; 289 290 if (!localaddr) { 291 if (link_id) 292 *link_id = _link_id; 293 return &sta->sta; 294 } 295 296 link = rcu_dereference(sta->sdata->link[_link_id]); 297 if (!link) 298 continue; 299 300 if (memcmp(link->conf->addr, localaddr, ETH_ALEN)) 301 continue; 302 303 if (link_id) 304 *link_id = _link_id; 305 return &sta->sta; 306 } 307 308 return NULL; 309} 310EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_link_addrs); 311 312struct sta_info *sta_info_get_by_addrs(struct ieee80211_local *local, 313 const u8 *sta_addr, const u8 *vif_addr) 314{ 315 struct rhlist_head *tmp; 316 struct sta_info *sta; 317 318 for_each_sta_info(local, sta_addr, sta, tmp) { 319 if (ether_addr_equal(vif_addr, sta->sdata->vif.addr)) 320 return sta; 321 } 322 323 return NULL; 324} 325 326struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata, 327 int idx) 328{ 329 struct ieee80211_local *local = sdata->local; 330 struct sta_info *sta; 331 int i = 0; 332 333 list_for_each_entry_rcu(sta, &local->sta_list, list, 334 lockdep_is_held(&local->sta_mtx)) { 335 if (sdata != sta->sdata) 336 continue; 337 if (i < idx) { 338 ++i; 339 continue; 340 } 341 return sta; 342 } 343 344 return NULL; 345} 346 347static void sta_info_free_link(struct link_sta_info *link_sta) 348{ 349 free_percpu(link_sta->pcpu_rx_stats); 350} 351 352static void sta_remove_link(struct sta_info *sta, unsigned int link_id, 353 bool unhash) 354{ 355 struct sta_link_alloc *alloc = NULL; 356 struct link_sta_info *link_sta; 357 358 link_sta = rcu_access_pointer(sta->link[link_id]); 359 if (link_sta != &sta->deflink) 360 lockdep_assert_held(&sta->local->sta_mtx); 361 362 if (WARN_ON(!link_sta)) 363 return; 364 365 if (unhash) 366 link_sta_info_hash_del(sta->local, link_sta); 367 368 if (test_sta_flag(sta, WLAN_STA_INSERTED)) 369 ieee80211_link_sta_debugfs_remove(link_sta); 370 371 if (link_sta != &sta->deflink) 372 alloc = container_of(link_sta, typeof(*alloc), info); 373 374 sta->sta.valid_links &= ~BIT(link_id); 375 RCU_INIT_POINTER(sta->link[link_id], NULL); 376 RCU_INIT_POINTER(sta->sta.link[link_id], NULL); 377 if (alloc) { 378 sta_info_free_link(&alloc->info); 379 kfree_rcu(alloc, rcu_head); 380 } 381 382 ieee80211_sta_recalc_aggregates(&sta->sta); 383} 384 385/** 386 * sta_info_free - free STA 387 * 388 * @local: pointer to the global information 389 * @sta: STA info to free 390 * 391 * This function must undo everything done by sta_info_alloc() 392 * that may happen before sta_info_insert(). It may only be 393 * called when sta_info_insert() has not been attempted (and 394 * if that fails, the station is freed anyway.) 395 */ 396void sta_info_free(struct ieee80211_local *local, struct sta_info *sta) 397{ 398 int i; 399 400 for (i = 0; i < ARRAY_SIZE(sta->link); i++) { 401 struct link_sta_info *link_sta; 402 403 link_sta = rcu_access_pointer(sta->link[i]); 404 if (!link_sta) 405 continue; 406 407 sta_remove_link(sta, i, false); 408 } 409 410 /* 411 * If we had used sta_info_pre_move_state() then we might not 412 * have gone through the state transitions down again, so do 413 * it here now (and warn if it's inserted). 414 * 415 * This will clear state such as fast TX/RX that may have been 416 * allocated during state transitions. 417 */ 418 while (sta->sta_state > IEEE80211_STA_NONE) { 419 int ret; 420 421 WARN_ON_ONCE(test_sta_flag(sta, WLAN_STA_INSERTED)); 422 423 ret = sta_info_move_state(sta, sta->sta_state - 1); 424 if (WARN_ONCE(ret, "sta_info_move_state() returned %d\n", ret)) 425 break; 426 } 427 428 if (sta->rate_ctrl) 429 rate_control_free_sta(sta); 430 431 sta_dbg(sta->sdata, "Destroyed STA %pM\n", sta->sta.addr); 432 433 kfree(to_txq_info(sta->sta.txq[0])); 434 kfree(rcu_dereference_raw(sta->sta.rates)); 435#ifdef CONFIG_MAC80211_MESH 436 kfree(sta->mesh); 437#endif 438 439 sta_info_free_link(&sta->deflink); 440 kfree(sta); 441} 442 443/* Caller must hold local->sta_mtx */ 444static int sta_info_hash_add(struct ieee80211_local *local, 445 struct sta_info *sta) 446{ 447 return rhltable_insert(&local->sta_hash, &sta->hash_node, 448 sta_rht_params); 449} 450 451static void sta_deliver_ps_frames(struct work_struct *wk) 452{ 453 struct sta_info *sta; 454 455 sta = container_of(wk, struct sta_info, drv_deliver_wk); 456 457 if (sta->dead) 458 return; 459 460 local_bh_disable(); 461 if (!test_sta_flag(sta, WLAN_STA_PS_STA)) 462 ieee80211_sta_ps_deliver_wakeup(sta); 463 else if (test_and_clear_sta_flag(sta, WLAN_STA_PSPOLL)) 464 ieee80211_sta_ps_deliver_poll_response(sta); 465 else if (test_and_clear_sta_flag(sta, WLAN_STA_UAPSD)) 466 ieee80211_sta_ps_deliver_uapsd(sta); 467 local_bh_enable(); 468} 469 470static int sta_prepare_rate_control(struct ieee80211_local *local, 471 struct sta_info *sta, gfp_t gfp) 472{ 473 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) 474 return 0; 475 476 sta->rate_ctrl = local->rate_ctrl; 477 sta->rate_ctrl_priv = rate_control_alloc_sta(sta->rate_ctrl, 478 sta, gfp); 479 if (!sta->rate_ctrl_priv) 480 return -ENOMEM; 481 482 return 0; 483} 484 485static int sta_info_alloc_link(struct ieee80211_local *local, 486 struct link_sta_info *link_info, 487 gfp_t gfp) 488{ 489 struct ieee80211_hw *hw = &local->hw; 490 int i; 491 492 if (ieee80211_hw_check(hw, USES_RSS)) { 493 link_info->pcpu_rx_stats = 494 alloc_percpu_gfp(struct ieee80211_sta_rx_stats, gfp); 495 if (!link_info->pcpu_rx_stats) 496 return -ENOMEM; 497 } 498 499 link_info->rx_stats.last_rx = jiffies; 500 u64_stats_init(&link_info->rx_stats.syncp); 501 502 ewma_signal_init(&link_info->rx_stats_avg.signal); 503 ewma_avg_signal_init(&link_info->status_stats.avg_ack_signal); 504 for (i = 0; i < ARRAY_SIZE(link_info->rx_stats_avg.chain_signal); i++) 505 ewma_signal_init(&link_info->rx_stats_avg.chain_signal[i]); 506 507 return 0; 508} 509 510static void sta_info_add_link(struct sta_info *sta, 511 unsigned int link_id, 512 struct link_sta_info *link_info, 513 struct ieee80211_link_sta *link_sta) 514{ 515 link_info->sta = sta; 516 link_info->link_id = link_id; 517 link_info->pub = link_sta; 518 link_info->pub->sta = &sta->sta; 519 link_sta->link_id = link_id; 520 rcu_assign_pointer(sta->link[link_id], link_info); 521 rcu_assign_pointer(sta->sta.link[link_id], link_sta); 522 523 link_sta->smps_mode = IEEE80211_SMPS_OFF; 524 link_sta->agg.max_rc_amsdu_len = IEEE80211_MAX_MPDU_LEN_HT_BA; 525} 526 527static struct sta_info * 528__sta_info_alloc(struct ieee80211_sub_if_data *sdata, 529 const u8 *addr, int link_id, const u8 *link_addr, 530 gfp_t gfp) 531{ 532 struct ieee80211_local *local = sdata->local; 533 struct ieee80211_hw *hw = &local->hw; 534 struct sta_info *sta; 535 void *txq_data; 536 int size; 537 int i; 538 539 sta = kzalloc(sizeof(*sta) + hw->sta_data_size, gfp); 540 if (!sta) 541 return NULL; 542 543 sta->local = local; 544 sta->sdata = sdata; 545 546 if (sta_info_alloc_link(local, &sta->deflink, gfp)) 547 goto free; 548 549 if (link_id >= 0) { 550 sta_info_add_link(sta, link_id, &sta->deflink, 551 &sta->sta.deflink); 552 sta->sta.valid_links = BIT(link_id); 553 } else { 554 sta_info_add_link(sta, 0, &sta->deflink, &sta->sta.deflink); 555 } 556 557 sta->sta.cur = &sta->sta.deflink.agg; 558 559 spin_lock_init(&sta->lock); 560 spin_lock_init(&sta->ps_lock); 561 INIT_WORK(&sta->drv_deliver_wk, sta_deliver_ps_frames); 562 INIT_WORK(&sta->ampdu_mlme.work, ieee80211_ba_session_work); 563 mutex_init(&sta->ampdu_mlme.mtx); 564#ifdef CONFIG_MAC80211_MESH 565 if (ieee80211_vif_is_mesh(&sdata->vif)) { 566 sta->mesh = kzalloc(sizeof(*sta->mesh), gfp); 567 if (!sta->mesh) 568 goto free; 569 sta->mesh->plink_sta = sta; 570 spin_lock_init(&sta->mesh->plink_lock); 571 if (!sdata->u.mesh.user_mpm) 572 timer_setup(&sta->mesh->plink_timer, mesh_plink_timer, 573 0); 574 sta->mesh->nonpeer_pm = NL80211_MESH_POWER_ACTIVE; 575 } 576#endif 577 578 memcpy(sta->addr, addr, ETH_ALEN); 579 memcpy(sta->sta.addr, addr, ETH_ALEN); 580 memcpy(sta->deflink.addr, link_addr, ETH_ALEN); 581 memcpy(sta->sta.deflink.addr, link_addr, ETH_ALEN); 582 sta->sta.max_rx_aggregation_subframes = 583 local->hw.max_rx_aggregation_subframes; 584 585 /* TODO link specific alloc and assignments for MLO Link STA */ 586 587 /* Extended Key ID needs to install keys for keyid 0 and 1 Rx-only. 588 * The Tx path starts to use a key as soon as the key slot ptk_idx 589 * references to is not NULL. To not use the initial Rx-only key 590 * prematurely for Tx initialize ptk_idx to an impossible PTK keyid 591 * which always will refer to a NULL key. 592 */ 593 BUILD_BUG_ON(ARRAY_SIZE(sta->ptk) <= INVALID_PTK_KEYIDX); 594 sta->ptk_idx = INVALID_PTK_KEYIDX; 595 596 597 ieee80211_init_frag_cache(&sta->frags); 598 599 sta->sta_state = IEEE80211_STA_NONE; 600 601 if (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) 602 sta->amsdu_mesh_control = -1; 603 604 /* Mark TID as unreserved */ 605 sta->reserved_tid = IEEE80211_TID_UNRESERVED; 606 607 sta->last_connected = ktime_get_seconds(); 608 609 size = sizeof(struct txq_info) + 610 ALIGN(hw->txq_data_size, sizeof(void *)); 611 612 txq_data = kcalloc(ARRAY_SIZE(sta->sta.txq), size, gfp); 613 if (!txq_data) 614 goto free; 615 616 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) { 617 struct txq_info *txq = txq_data + i * size; 618 619 /* might not do anything for the (bufferable) MMPDU TXQ */ 620 ieee80211_txq_init(sdata, sta, txq, i); 621 } 622 623 if (sta_prepare_rate_control(local, sta, gfp)) 624 goto free_txq; 625 626 sta->airtime_weight = IEEE80211_DEFAULT_AIRTIME_WEIGHT; 627 628 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 629 skb_queue_head_init(&sta->ps_tx_buf[i]); 630 skb_queue_head_init(&sta->tx_filtered[i]); 631 sta->airtime[i].deficit = sta->airtime_weight; 632 atomic_set(&sta->airtime[i].aql_tx_pending, 0); 633 sta->airtime[i].aql_limit_low = local->aql_txq_limit_low[i]; 634 sta->airtime[i].aql_limit_high = local->aql_txq_limit_high[i]; 635 } 636 637 for (i = 0; i < IEEE80211_NUM_TIDS; i++) 638 sta->last_seq_ctrl[i] = cpu_to_le16(USHRT_MAX); 639 640 for (i = 0; i < NUM_NL80211_BANDS; i++) { 641 u32 mandatory = 0; 642 int r; 643 644 if (!hw->wiphy->bands[i]) 645 continue; 646 647 switch (i) { 648 case NL80211_BAND_2GHZ: 649 case NL80211_BAND_LC: 650 /* 651 * We use both here, even if we cannot really know for 652 * sure the station will support both, but the only use 653 * for this is when we don't know anything yet and send 654 * management frames, and then we'll pick the lowest 655 * possible rate anyway. 656 * If we don't include _G here, we cannot find a rate 657 * in P2P, and thus trigger the WARN_ONCE() in rate.c 658 */ 659 mandatory = IEEE80211_RATE_MANDATORY_B | 660 IEEE80211_RATE_MANDATORY_G; 661 break; 662 case NL80211_BAND_5GHZ: 663 mandatory = IEEE80211_RATE_MANDATORY_A; 664 break; 665 case NL80211_BAND_60GHZ: 666 WARN_ON(1); 667 mandatory = 0; 668 break; 669 } 670 671 for (r = 0; r < hw->wiphy->bands[i]->n_bitrates; r++) { 672 struct ieee80211_rate *rate; 673 674 rate = &hw->wiphy->bands[i]->bitrates[r]; 675 676 if (!(rate->flags & mandatory)) 677 continue; 678 sta->sta.deflink.supp_rates[i] |= BIT(r); 679 } 680 } 681 682 sta->cparams.ce_threshold = CODEL_DISABLED_THRESHOLD; 683 sta->cparams.target = MS2TIME(20); 684 sta->cparams.interval = MS2TIME(100); 685 sta->cparams.ecn = true; 686 sta->cparams.ce_threshold_selector = 0; 687 sta->cparams.ce_threshold_mask = 0; 688 689 sta_dbg(sdata, "Allocated STA %pM\n", sta->sta.addr); 690 691 return sta; 692 693free_txq: 694 kfree(to_txq_info(sta->sta.txq[0])); 695free: 696 sta_info_free_link(&sta->deflink); 697#ifdef CONFIG_MAC80211_MESH 698 kfree(sta->mesh); 699#endif 700 kfree(sta); 701 return NULL; 702} 703 704struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata, 705 const u8 *addr, gfp_t gfp) 706{ 707 return __sta_info_alloc(sdata, addr, -1, addr, gfp); 708} 709 710struct sta_info *sta_info_alloc_with_link(struct ieee80211_sub_if_data *sdata, 711 const u8 *mld_addr, 712 unsigned int link_id, 713 const u8 *link_addr, 714 gfp_t gfp) 715{ 716 return __sta_info_alloc(sdata, mld_addr, link_id, link_addr, gfp); 717} 718 719static int sta_info_insert_check(struct sta_info *sta) 720{ 721 struct ieee80211_sub_if_data *sdata = sta->sdata; 722 723 /* 724 * Can't be a WARN_ON because it can be triggered through a race: 725 * something inserts a STA (on one CPU) without holding the RTNL 726 * and another CPU turns off the net device. 727 */ 728 if (unlikely(!ieee80211_sdata_running(sdata))) 729 return -ENETDOWN; 730 731 if (WARN_ON(ether_addr_equal(sta->sta.addr, sdata->vif.addr) || 732 !is_valid_ether_addr(sta->sta.addr))) 733 return -EINVAL; 734 735 /* The RCU read lock is required by rhashtable due to 736 * asynchronous resize/rehash. We also require the mutex 737 * for correctness. 738 */ 739 rcu_read_lock(); 740 lockdep_assert_held(&sdata->local->sta_mtx); 741 if (ieee80211_hw_check(&sdata->local->hw, NEEDS_UNIQUE_STA_ADDR) && 742 ieee80211_find_sta_by_ifaddr(&sdata->local->hw, sta->addr, NULL)) { 743 rcu_read_unlock(); 744 return -ENOTUNIQ; 745 } 746 rcu_read_unlock(); 747 748 return 0; 749} 750 751static int sta_info_insert_drv_state(struct ieee80211_local *local, 752 struct ieee80211_sub_if_data *sdata, 753 struct sta_info *sta) 754{ 755 enum ieee80211_sta_state state; 756 int err = 0; 757 758 for (state = IEEE80211_STA_NOTEXIST; state < sta->sta_state; state++) { 759 err = drv_sta_state(local, sdata, sta, state, state + 1); 760 if (err) 761 break; 762 } 763 764 if (!err) { 765 /* 766 * Drivers using legacy sta_add/sta_remove callbacks only 767 * get uploaded set to true after sta_add is called. 768 */ 769 if (!local->ops->sta_add) 770 sta->uploaded = true; 771 return 0; 772 } 773 774 if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { 775 sdata_info(sdata, 776 "failed to move IBSS STA %pM to state %d (%d) - keeping it anyway\n", 777 sta->sta.addr, state + 1, err); 778 err = 0; 779 } 780 781 /* unwind on error */ 782 for (; state > IEEE80211_STA_NOTEXIST; state--) 783 WARN_ON(drv_sta_state(local, sdata, sta, state, state - 1)); 784 785 return err; 786} 787 788static void 789ieee80211_recalc_p2p_go_ps_allowed(struct ieee80211_sub_if_data *sdata) 790{ 791 struct ieee80211_local *local = sdata->local; 792 bool allow_p2p_go_ps = sdata->vif.p2p; 793 struct sta_info *sta; 794 795 rcu_read_lock(); 796 list_for_each_entry_rcu(sta, &local->sta_list, list) { 797 if (sdata != sta->sdata || 798 !test_sta_flag(sta, WLAN_STA_ASSOC)) 799 continue; 800 if (!sta->sta.support_p2p_ps) { 801 allow_p2p_go_ps = false; 802 break; 803 } 804 } 805 rcu_read_unlock(); 806 807 if (allow_p2p_go_ps != sdata->vif.bss_conf.allow_p2p_go_ps) { 808 sdata->vif.bss_conf.allow_p2p_go_ps = allow_p2p_go_ps; 809 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 810 BSS_CHANGED_P2P_PS); 811 } 812} 813 814/* 815 * should be called with sta_mtx locked 816 * this function replaces the mutex lock 817 * with a RCU lock 818 */ 819static int sta_info_insert_finish(struct sta_info *sta) __acquires(RCU) 820{ 821 struct ieee80211_local *local = sta->local; 822 struct ieee80211_sub_if_data *sdata = sta->sdata; 823 struct station_info *sinfo = NULL; 824 int err = 0; 825 826 lockdep_assert_held(&local->sta_mtx); 827 828 /* check if STA exists already */ 829 if (sta_info_get_bss(sdata, sta->sta.addr)) { 830 err = -EEXIST; 831 goto out_cleanup; 832 } 833 834 sinfo = kzalloc(sizeof(struct station_info), GFP_KERNEL); 835 if (!sinfo) { 836 err = -ENOMEM; 837 goto out_cleanup; 838 } 839 840 local->num_sta++; 841 local->sta_generation++; 842 smp_mb(); 843 844 /* simplify things and don't accept BA sessions yet */ 845 set_sta_flag(sta, WLAN_STA_BLOCK_BA); 846 847 /* make the station visible */ 848 err = sta_info_hash_add(local, sta); 849 if (err) 850 goto out_drop_sta; 851 852 if (sta->sta.valid_links) { 853 err = link_sta_info_hash_add(local, &sta->deflink); 854 if (err) { 855 sta_info_hash_del(local, sta); 856 goto out_drop_sta; 857 } 858 } 859 860 list_add_tail_rcu(&sta->list, &local->sta_list); 861 862 /* update channel context before notifying the driver about state 863 * change, this enables driver using the updated channel context right away. 864 */ 865 if (sta->sta_state >= IEEE80211_STA_ASSOC) { 866 ieee80211_recalc_min_chandef(sta->sdata, -1); 867 if (!sta->sta.support_p2p_ps) 868 ieee80211_recalc_p2p_go_ps_allowed(sta->sdata); 869 } 870 871 /* notify driver */ 872 err = sta_info_insert_drv_state(local, sdata, sta); 873 if (err) 874 goto out_remove; 875 876 set_sta_flag(sta, WLAN_STA_INSERTED); 877 878 /* accept BA sessions now */ 879 clear_sta_flag(sta, WLAN_STA_BLOCK_BA); 880 881 ieee80211_sta_debugfs_add(sta); 882 rate_control_add_sta_debugfs(sta); 883 if (sta->sta.valid_links) { 884 int i; 885 886 for (i = 0; i < ARRAY_SIZE(sta->link); i++) { 887 struct link_sta_info *link_sta; 888 889 link_sta = rcu_dereference_protected(sta->link[i], 890 lockdep_is_held(&local->sta_mtx)); 891 892 if (!link_sta) 893 continue; 894 895 ieee80211_link_sta_debugfs_add(link_sta); 896 if (sdata->vif.active_links & BIT(i)) 897 ieee80211_link_sta_debugfs_drv_add(link_sta); 898 } 899 } else { 900 ieee80211_link_sta_debugfs_add(&sta->deflink); 901 ieee80211_link_sta_debugfs_drv_add(&sta->deflink); 902 } 903 904 sinfo->generation = local->sta_generation; 905 cfg80211_new_sta(sdata->dev, sta->sta.addr, sinfo, GFP_KERNEL); 906 kfree(sinfo); 907 908 sta_dbg(sdata, "Inserted STA %pM\n", sta->sta.addr); 909 910 /* move reference to rcu-protected */ 911 rcu_read_lock(); 912 mutex_unlock(&local->sta_mtx); 913 914 if (ieee80211_vif_is_mesh(&sdata->vif)) 915 mesh_accept_plinks_update(sdata); 916 917 ieee80211_check_fast_xmit(sta); 918 919 return 0; 920 out_remove: 921 if (sta->sta.valid_links) 922 link_sta_info_hash_del(local, &sta->deflink); 923 sta_info_hash_del(local, sta); 924 list_del_rcu(&sta->list); 925 out_drop_sta: 926 local->num_sta--; 927 synchronize_net(); 928 out_cleanup: 929 cleanup_single_sta(sta); 930 mutex_unlock(&local->sta_mtx); 931 kfree(sinfo); 932 rcu_read_lock(); 933 return err; 934} 935 936int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU) 937{ 938 struct ieee80211_local *local = sta->local; 939 int err; 940 941 might_sleep(); 942 943 mutex_lock(&local->sta_mtx); 944 945 err = sta_info_insert_check(sta); 946 if (err) { 947 sta_info_free(local, sta); 948 mutex_unlock(&local->sta_mtx); 949 rcu_read_lock(); 950 return err; 951 } 952 953 return sta_info_insert_finish(sta); 954} 955 956int sta_info_insert(struct sta_info *sta) 957{ 958 int err = sta_info_insert_rcu(sta); 959 960 rcu_read_unlock(); 961 962 return err; 963} 964 965static inline void __bss_tim_set(u8 *tim, u16 id) 966{ 967 /* 968 * This format has been mandated by the IEEE specifications, 969 * so this line may not be changed to use the __set_bit() format. 970 */ 971 tim[id / 8] |= (1 << (id % 8)); 972} 973 974static inline void __bss_tim_clear(u8 *tim, u16 id) 975{ 976 /* 977 * This format has been mandated by the IEEE specifications, 978 * so this line may not be changed to use the __clear_bit() format. 979 */ 980 tim[id / 8] &= ~(1 << (id % 8)); 981} 982 983static inline bool __bss_tim_get(u8 *tim, u16 id) 984{ 985 /* 986 * This format has been mandated by the IEEE specifications, 987 * so this line may not be changed to use the test_bit() format. 988 */ 989 return tim[id / 8] & (1 << (id % 8)); 990} 991 992static unsigned long ieee80211_tids_for_ac(int ac) 993{ 994 /* If we ever support TIDs > 7, this obviously needs to be adjusted */ 995 switch (ac) { 996 case IEEE80211_AC_VO: 997 return BIT(6) | BIT(7); 998 case IEEE80211_AC_VI: 999 return BIT(4) | BIT(5); 1000 case IEEE80211_AC_BE: 1001 return BIT(0) | BIT(3); 1002 case IEEE80211_AC_BK: 1003 return BIT(1) | BIT(2); 1004 default: 1005 WARN_ON(1); 1006 return 0; 1007 } 1008} 1009 1010static void __sta_info_recalc_tim(struct sta_info *sta, bool ignore_pending) 1011{ 1012 struct ieee80211_local *local = sta->local; 1013 struct ps_data *ps; 1014 bool indicate_tim = false; 1015 u8 ignore_for_tim = sta->sta.uapsd_queues; 1016 int ac; 1017 u16 id = sta->sta.aid; 1018 1019 if (sta->sdata->vif.type == NL80211_IFTYPE_AP || 1020 sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 1021 if (WARN_ON_ONCE(!sta->sdata->bss)) 1022 return; 1023 1024 ps = &sta->sdata->bss->ps; 1025#ifdef CONFIG_MAC80211_MESH 1026 } else if (ieee80211_vif_is_mesh(&sta->sdata->vif)) { 1027 ps = &sta->sdata->u.mesh.ps; 1028#endif 1029 } else { 1030 return; 1031 } 1032 1033 /* No need to do anything if the driver does all */ 1034 if (ieee80211_hw_check(&local->hw, AP_LINK_PS) && !local->ops->set_tim) 1035 return; 1036 1037 if (sta->dead) 1038 goto done; 1039 1040 /* 1041 * If all ACs are delivery-enabled then we should build 1042 * the TIM bit for all ACs anyway; if only some are then 1043 * we ignore those and build the TIM bit using only the 1044 * non-enabled ones. 1045 */ 1046 if (ignore_for_tim == BIT(IEEE80211_NUM_ACS) - 1) 1047 ignore_for_tim = 0; 1048 1049 if (ignore_pending) 1050 ignore_for_tim = BIT(IEEE80211_NUM_ACS) - 1; 1051 1052 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1053 unsigned long tids; 1054 1055 if (ignore_for_tim & ieee80211_ac_to_qos_mask[ac]) 1056 continue; 1057 1058 indicate_tim |= !skb_queue_empty(&sta->tx_filtered[ac]) || 1059 !skb_queue_empty(&sta->ps_tx_buf[ac]); 1060 if (indicate_tim) 1061 break; 1062 1063 tids = ieee80211_tids_for_ac(ac); 1064 1065 indicate_tim |= 1066 sta->driver_buffered_tids & tids; 1067 indicate_tim |= 1068 sta->txq_buffered_tids & tids; 1069 } 1070 1071 done: 1072 spin_lock_bh(&local->tim_lock); 1073 1074 if (indicate_tim == __bss_tim_get(ps->tim, id)) 1075 goto out_unlock; 1076 1077 if (indicate_tim) 1078 __bss_tim_set(ps->tim, id); 1079 else 1080 __bss_tim_clear(ps->tim, id); 1081 1082 if (local->ops->set_tim && !WARN_ON(sta->dead)) { 1083 local->tim_in_locked_section = true; 1084 drv_set_tim(local, &sta->sta, indicate_tim); 1085 local->tim_in_locked_section = false; 1086 } 1087 1088out_unlock: 1089 spin_unlock_bh(&local->tim_lock); 1090} 1091 1092void sta_info_recalc_tim(struct sta_info *sta) 1093{ 1094 __sta_info_recalc_tim(sta, false); 1095} 1096 1097static bool sta_info_buffer_expired(struct sta_info *sta, struct sk_buff *skb) 1098{ 1099 struct ieee80211_tx_info *info; 1100 int timeout; 1101 1102 if (!skb) 1103 return false; 1104 1105 info = IEEE80211_SKB_CB(skb); 1106 1107 /* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */ 1108 timeout = (sta->listen_interval * 1109 sta->sdata->vif.bss_conf.beacon_int * 1110 32 / 15625) * HZ; 1111 if (timeout < STA_TX_BUFFER_EXPIRE) 1112 timeout = STA_TX_BUFFER_EXPIRE; 1113 return time_after(jiffies, info->control.jiffies + timeout); 1114} 1115 1116 1117static bool sta_info_cleanup_expire_buffered_ac(struct ieee80211_local *local, 1118 struct sta_info *sta, int ac) 1119{ 1120 unsigned long flags; 1121 struct sk_buff *skb; 1122 1123 /* 1124 * First check for frames that should expire on the filtered 1125 * queue. Frames here were rejected by the driver and are on 1126 * a separate queue to avoid reordering with normal PS-buffered 1127 * frames. They also aren't accounted for right now in the 1128 * total_ps_buffered counter. 1129 */ 1130 for (;;) { 1131 spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags); 1132 skb = skb_peek(&sta->tx_filtered[ac]); 1133 if (sta_info_buffer_expired(sta, skb)) 1134 skb = __skb_dequeue(&sta->tx_filtered[ac]); 1135 else 1136 skb = NULL; 1137 spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags); 1138 1139 /* 1140 * Frames are queued in order, so if this one 1141 * hasn't expired yet we can stop testing. If 1142 * we actually reached the end of the queue we 1143 * also need to stop, of course. 1144 */ 1145 if (!skb) 1146 break; 1147 ieee80211_free_txskb(&local->hw, skb); 1148 } 1149 1150 /* 1151 * Now also check the normal PS-buffered queue, this will 1152 * only find something if the filtered queue was emptied 1153 * since the filtered frames are all before the normal PS 1154 * buffered frames. 1155 */ 1156 for (;;) { 1157 spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags); 1158 skb = skb_peek(&sta->ps_tx_buf[ac]); 1159 if (sta_info_buffer_expired(sta, skb)) 1160 skb = __skb_dequeue(&sta->ps_tx_buf[ac]); 1161 else 1162 skb = NULL; 1163 spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags); 1164 1165 /* 1166 * frames are queued in order, so if this one 1167 * hasn't expired yet (or we reached the end of 1168 * the queue) we can stop testing 1169 */ 1170 if (!skb) 1171 break; 1172 1173 local->total_ps_buffered--; 1174 ps_dbg(sta->sdata, "Buffered frame expired (STA %pM)\n", 1175 sta->sta.addr); 1176 ieee80211_free_txskb(&local->hw, skb); 1177 } 1178 1179 /* 1180 * Finally, recalculate the TIM bit for this station -- it might 1181 * now be clear because the station was too slow to retrieve its 1182 * frames. 1183 */ 1184 sta_info_recalc_tim(sta); 1185 1186 /* 1187 * Return whether there are any frames still buffered, this is 1188 * used to check whether the cleanup timer still needs to run, 1189 * if there are no frames we don't need to rearm the timer. 1190 */ 1191 return !(skb_queue_empty(&sta->ps_tx_buf[ac]) && 1192 skb_queue_empty(&sta->tx_filtered[ac])); 1193} 1194 1195static bool sta_info_cleanup_expire_buffered(struct ieee80211_local *local, 1196 struct sta_info *sta) 1197{ 1198 bool have_buffered = false; 1199 int ac; 1200 1201 /* This is only necessary for stations on BSS/MBSS interfaces */ 1202 if (!sta->sdata->bss && 1203 !ieee80211_vif_is_mesh(&sta->sdata->vif)) 1204 return false; 1205 1206 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 1207 have_buffered |= 1208 sta_info_cleanup_expire_buffered_ac(local, sta, ac); 1209 1210 return have_buffered; 1211} 1212 1213static int __must_check __sta_info_destroy_part1(struct sta_info *sta) 1214{ 1215 struct ieee80211_local *local; 1216 struct ieee80211_sub_if_data *sdata; 1217 int ret, i; 1218 1219 might_sleep(); 1220 1221 if (!sta) 1222 return -ENOENT; 1223 1224 local = sta->local; 1225 sdata = sta->sdata; 1226 1227 lockdep_assert_held(&local->sta_mtx); 1228 1229 /* 1230 * Before removing the station from the driver and 1231 * rate control, it might still start new aggregation 1232 * sessions -- block that to make sure the tear-down 1233 * will be sufficient. 1234 */ 1235 set_sta_flag(sta, WLAN_STA_BLOCK_BA); 1236 ieee80211_sta_tear_down_BA_sessions(sta, AGG_STOP_DESTROY_STA); 1237 1238 /* 1239 * Before removing the station from the driver there might be pending 1240 * rx frames on RSS queues sent prior to the disassociation - wait for 1241 * all such frames to be processed. 1242 */ 1243 drv_sync_rx_queues(local, sta); 1244 1245 for (i = 0; i < ARRAY_SIZE(sta->link); i++) { 1246 struct link_sta_info *link_sta; 1247 1248 if (!(sta->sta.valid_links & BIT(i))) 1249 continue; 1250 1251 link_sta = rcu_dereference_protected(sta->link[i], 1252 lockdep_is_held(&local->sta_mtx)); 1253 1254 link_sta_info_hash_del(local, link_sta); 1255 } 1256 1257 ret = sta_info_hash_del(local, sta); 1258 if (WARN_ON(ret)) 1259 return ret; 1260 1261 /* 1262 * for TDLS peers, make sure to return to the base channel before 1263 * removal. 1264 */ 1265 if (test_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL)) { 1266 drv_tdls_cancel_channel_switch(local, sdata, &sta->sta); 1267 clear_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL); 1268 } 1269 1270 list_del_rcu(&sta->list); 1271 sta->removed = true; 1272 1273 if (sta->uploaded) 1274 drv_sta_pre_rcu_remove(local, sta->sdata, sta); 1275 1276 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN && 1277 rcu_access_pointer(sdata->u.vlan.sta) == sta) 1278 RCU_INIT_POINTER(sdata->u.vlan.sta, NULL); 1279 1280 return 0; 1281} 1282 1283static int _sta_info_move_state(struct sta_info *sta, 1284 enum ieee80211_sta_state new_state, 1285 bool recalc) 1286{ 1287 might_sleep(); 1288 1289 if (sta->sta_state == new_state) 1290 return 0; 1291 1292 /* check allowed transitions first */ 1293 1294 switch (new_state) { 1295 case IEEE80211_STA_NONE: 1296 if (sta->sta_state != IEEE80211_STA_AUTH) 1297 return -EINVAL; 1298 break; 1299 case IEEE80211_STA_AUTH: 1300 if (sta->sta_state != IEEE80211_STA_NONE && 1301 sta->sta_state != IEEE80211_STA_ASSOC) 1302 return -EINVAL; 1303 break; 1304 case IEEE80211_STA_ASSOC: 1305 if (sta->sta_state != IEEE80211_STA_AUTH && 1306 sta->sta_state != IEEE80211_STA_AUTHORIZED) 1307 return -EINVAL; 1308 break; 1309 case IEEE80211_STA_AUTHORIZED: 1310 if (sta->sta_state != IEEE80211_STA_ASSOC) 1311 return -EINVAL; 1312 break; 1313 default: 1314 WARN(1, "invalid state %d", new_state); 1315 return -EINVAL; 1316 } 1317 1318 sta_dbg(sta->sdata, "moving STA %pM to state %d\n", 1319 sta->sta.addr, new_state); 1320 1321 /* notify the driver before the actual changes so it can 1322 * fail the transition 1323 */ 1324 if (test_sta_flag(sta, WLAN_STA_INSERTED)) { 1325 int err = drv_sta_state(sta->local, sta->sdata, sta, 1326 sta->sta_state, new_state); 1327 if (err) 1328 return err; 1329 } 1330 1331 /* reflect the change in all state variables */ 1332 1333 switch (new_state) { 1334 case IEEE80211_STA_NONE: 1335 if (sta->sta_state == IEEE80211_STA_AUTH) 1336 clear_bit(WLAN_STA_AUTH, &sta->_flags); 1337 break; 1338 case IEEE80211_STA_AUTH: 1339 if (sta->sta_state == IEEE80211_STA_NONE) { 1340 set_bit(WLAN_STA_AUTH, &sta->_flags); 1341 } else if (sta->sta_state == IEEE80211_STA_ASSOC) { 1342 clear_bit(WLAN_STA_ASSOC, &sta->_flags); 1343 if (recalc) { 1344 ieee80211_recalc_min_chandef(sta->sdata, -1); 1345 if (!sta->sta.support_p2p_ps) 1346 ieee80211_recalc_p2p_go_ps_allowed(sta->sdata); 1347 } 1348 } 1349 break; 1350 case IEEE80211_STA_ASSOC: 1351 if (sta->sta_state == IEEE80211_STA_AUTH) { 1352 set_bit(WLAN_STA_ASSOC, &sta->_flags); 1353 sta->assoc_at = ktime_get_boottime_ns(); 1354 if (recalc) { 1355 ieee80211_recalc_min_chandef(sta->sdata, -1); 1356 if (!sta->sta.support_p2p_ps) 1357 ieee80211_recalc_p2p_go_ps_allowed(sta->sdata); 1358 } 1359 } else if (sta->sta_state == IEEE80211_STA_AUTHORIZED) { 1360 ieee80211_vif_dec_num_mcast(sta->sdata); 1361 clear_bit(WLAN_STA_AUTHORIZED, &sta->_flags); 1362 ieee80211_clear_fast_xmit(sta); 1363 ieee80211_clear_fast_rx(sta); 1364 } 1365 break; 1366 case IEEE80211_STA_AUTHORIZED: 1367 if (sta->sta_state == IEEE80211_STA_ASSOC) { 1368 ieee80211_vif_inc_num_mcast(sta->sdata); 1369 set_bit(WLAN_STA_AUTHORIZED, &sta->_flags); 1370 ieee80211_check_fast_xmit(sta); 1371 ieee80211_check_fast_rx(sta); 1372 } 1373 if (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN || 1374 sta->sdata->vif.type == NL80211_IFTYPE_AP) 1375 cfg80211_send_layer2_update(sta->sdata->dev, 1376 sta->sta.addr); 1377 break; 1378 default: 1379 break; 1380 } 1381 1382 sta->sta_state = new_state; 1383 1384 return 0; 1385} 1386 1387int sta_info_move_state(struct sta_info *sta, 1388 enum ieee80211_sta_state new_state) 1389{ 1390 return _sta_info_move_state(sta, new_state, true); 1391} 1392 1393static void __sta_info_destroy_part2(struct sta_info *sta, bool recalc) 1394{ 1395 struct ieee80211_local *local = sta->local; 1396 struct ieee80211_sub_if_data *sdata = sta->sdata; 1397 struct station_info *sinfo; 1398 int ret; 1399 1400 /* 1401 * NOTE: This assumes at least synchronize_net() was done 1402 * after _part1 and before _part2! 1403 */ 1404 1405 might_sleep(); 1406 lockdep_assert_held(&local->sta_mtx); 1407 1408 if (sta->sta_state == IEEE80211_STA_AUTHORIZED) { 1409 ret = _sta_info_move_state(sta, IEEE80211_STA_ASSOC, recalc); 1410 WARN_ON_ONCE(ret); 1411 } 1412 1413 /* Flush queues before removing keys, as that might remove them 1414 * from hardware, and then depending on the offload method, any 1415 * frames sitting on hardware queues might be sent out without 1416 * any encryption at all. 1417 */ 1418 if (local->ops->set_key) { 1419 if (local->ops->flush_sta) 1420 drv_flush_sta(local, sta->sdata, sta); 1421 else 1422 ieee80211_flush_queues(local, sta->sdata, false); 1423 } 1424 1425 /* now keys can no longer be reached */ 1426 ieee80211_free_sta_keys(local, sta); 1427 1428 /* disable TIM bit - last chance to tell driver */ 1429 __sta_info_recalc_tim(sta, true); 1430 1431 sta->dead = true; 1432 1433 local->num_sta--; 1434 local->sta_generation++; 1435 1436 while (sta->sta_state > IEEE80211_STA_NONE) { 1437 ret = _sta_info_move_state(sta, sta->sta_state - 1, recalc); 1438 if (ret) { 1439 WARN_ON_ONCE(1); 1440 break; 1441 } 1442 } 1443 1444 if (sta->uploaded) { 1445 ret = drv_sta_state(local, sdata, sta, IEEE80211_STA_NONE, 1446 IEEE80211_STA_NOTEXIST); 1447 WARN_ON_ONCE(ret != 0); 1448 } 1449 1450 sta_dbg(sdata, "Removed STA %pM\n", sta->sta.addr); 1451 1452 sinfo = kzalloc(sizeof(*sinfo), GFP_KERNEL); 1453 if (sinfo) 1454 sta_set_sinfo(sta, sinfo, true); 1455 cfg80211_del_sta_sinfo(sdata->dev, sta->sta.addr, sinfo, GFP_KERNEL); 1456 kfree(sinfo); 1457 1458 ieee80211_sta_debugfs_remove(sta); 1459 1460 ieee80211_destroy_frag_cache(&sta->frags); 1461 1462 cleanup_single_sta(sta); 1463} 1464 1465int __must_check __sta_info_destroy(struct sta_info *sta) 1466{ 1467 int err = __sta_info_destroy_part1(sta); 1468 1469 if (err) 1470 return err; 1471 1472 synchronize_net(); 1473 1474 __sta_info_destroy_part2(sta, true); 1475 1476 return 0; 1477} 1478 1479int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, const u8 *addr) 1480{ 1481 struct sta_info *sta; 1482 int ret; 1483 1484 mutex_lock(&sdata->local->sta_mtx); 1485 sta = sta_info_get(sdata, addr); 1486 ret = __sta_info_destroy(sta); 1487 mutex_unlock(&sdata->local->sta_mtx); 1488 1489 return ret; 1490} 1491 1492int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata, 1493 const u8 *addr) 1494{ 1495 struct sta_info *sta; 1496 int ret; 1497 1498 mutex_lock(&sdata->local->sta_mtx); 1499 sta = sta_info_get_bss(sdata, addr); 1500 ret = __sta_info_destroy(sta); 1501 mutex_unlock(&sdata->local->sta_mtx); 1502 1503 return ret; 1504} 1505 1506static void sta_info_cleanup(struct timer_list *t) 1507{ 1508 struct ieee80211_local *local = from_timer(local, t, sta_cleanup); 1509 struct sta_info *sta; 1510 bool timer_needed = false; 1511 1512 rcu_read_lock(); 1513 list_for_each_entry_rcu(sta, &local->sta_list, list) 1514 if (sta_info_cleanup_expire_buffered(local, sta)) 1515 timer_needed = true; 1516 rcu_read_unlock(); 1517 1518 if (local->quiescing) 1519 return; 1520 1521 if (!timer_needed) 1522 return; 1523 1524 mod_timer(&local->sta_cleanup, 1525 round_jiffies(jiffies + STA_INFO_CLEANUP_INTERVAL)); 1526} 1527 1528int sta_info_init(struct ieee80211_local *local) 1529{ 1530 int err; 1531 1532 err = rhltable_init(&local->sta_hash, &sta_rht_params); 1533 if (err) 1534 return err; 1535 1536 err = rhltable_init(&local->link_sta_hash, &link_sta_rht_params); 1537 if (err) { 1538 rhltable_destroy(&local->sta_hash); 1539 return err; 1540 } 1541 1542 spin_lock_init(&local->tim_lock); 1543 mutex_init(&local->sta_mtx); 1544 INIT_LIST_HEAD(&local->sta_list); 1545 1546 timer_setup(&local->sta_cleanup, sta_info_cleanup, 0); 1547 return 0; 1548} 1549 1550void sta_info_stop(struct ieee80211_local *local) 1551{ 1552 del_timer_sync(&local->sta_cleanup); 1553 rhltable_destroy(&local->sta_hash); 1554 rhltable_destroy(&local->link_sta_hash); 1555} 1556 1557 1558int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans) 1559{ 1560 struct ieee80211_local *local = sdata->local; 1561 struct sta_info *sta, *tmp; 1562 LIST_HEAD(free_list); 1563 int ret = 0; 1564 1565 might_sleep(); 1566 1567 WARN_ON(vlans && sdata->vif.type != NL80211_IFTYPE_AP); 1568 WARN_ON(vlans && !sdata->bss); 1569 1570 mutex_lock(&local->sta_mtx); 1571 list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { 1572 if (sdata == sta->sdata || 1573 (vlans && sdata->bss == sta->sdata->bss)) { 1574 if (!WARN_ON(__sta_info_destroy_part1(sta))) 1575 list_add(&sta->free_list, &free_list); 1576 ret++; 1577 } 1578 } 1579 1580 if (!list_empty(&free_list)) { 1581 bool support_p2p_ps = true; 1582 1583 synchronize_net(); 1584 list_for_each_entry_safe(sta, tmp, &free_list, free_list) { 1585 if (!sta->sta.support_p2p_ps) 1586 support_p2p_ps = false; 1587 __sta_info_destroy_part2(sta, false); 1588 } 1589 1590 ieee80211_recalc_min_chandef(sdata, -1); 1591 if (!support_p2p_ps) 1592 ieee80211_recalc_p2p_go_ps_allowed(sdata); 1593 } 1594 mutex_unlock(&local->sta_mtx); 1595 1596 return ret; 1597} 1598 1599void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, 1600 unsigned long exp_time) 1601{ 1602 struct ieee80211_local *local = sdata->local; 1603 struct sta_info *sta, *tmp; 1604 1605 mutex_lock(&local->sta_mtx); 1606 1607 list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { 1608 unsigned long last_active = ieee80211_sta_last_active(sta); 1609 1610 if (sdata != sta->sdata) 1611 continue; 1612 1613 if (time_is_before_jiffies(last_active + exp_time)) { 1614 sta_dbg(sta->sdata, "expiring inactive STA %pM\n", 1615 sta->sta.addr); 1616 1617 if (ieee80211_vif_is_mesh(&sdata->vif) && 1618 test_sta_flag(sta, WLAN_STA_PS_STA)) 1619 atomic_dec(&sdata->u.mesh.ps.num_sta_ps); 1620 1621 WARN_ON(__sta_info_destroy(sta)); 1622 } 1623 } 1624 1625 mutex_unlock(&local->sta_mtx); 1626} 1627 1628struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw, 1629 const u8 *addr, 1630 const u8 *localaddr) 1631{ 1632 struct ieee80211_local *local = hw_to_local(hw); 1633 struct rhlist_head *tmp; 1634 struct sta_info *sta; 1635 1636 /* 1637 * Just return a random station if localaddr is NULL 1638 * ... first in list. 1639 */ 1640 for_each_sta_info(local, addr, sta, tmp) { 1641 if (localaddr && 1642 !ether_addr_equal(sta->sdata->vif.addr, localaddr)) 1643 continue; 1644 if (!sta->uploaded) 1645 return NULL; 1646 return &sta->sta; 1647 } 1648 1649 return NULL; 1650} 1651EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_ifaddr); 1652 1653struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif, 1654 const u8 *addr) 1655{ 1656 struct sta_info *sta; 1657 1658 if (!vif) 1659 return NULL; 1660 1661 sta = sta_info_get_bss(vif_to_sdata(vif), addr); 1662 if (!sta) 1663 return NULL; 1664 1665 if (!sta->uploaded) 1666 return NULL; 1667 1668 return &sta->sta; 1669} 1670EXPORT_SYMBOL(ieee80211_find_sta); 1671 1672/* powersave support code */ 1673void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta) 1674{ 1675 struct ieee80211_sub_if_data *sdata = sta->sdata; 1676 struct ieee80211_local *local = sdata->local; 1677 struct sk_buff_head pending; 1678 int filtered = 0, buffered = 0, ac, i; 1679 unsigned long flags; 1680 struct ps_data *ps; 1681 1682 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 1683 sdata = container_of(sdata->bss, struct ieee80211_sub_if_data, 1684 u.ap); 1685 1686 if (sdata->vif.type == NL80211_IFTYPE_AP) 1687 ps = &sdata->bss->ps; 1688 else if (ieee80211_vif_is_mesh(&sdata->vif)) 1689 ps = &sdata->u.mesh.ps; 1690 else 1691 return; 1692 1693 clear_sta_flag(sta, WLAN_STA_SP); 1694 1695 BUILD_BUG_ON(BITS_TO_LONGS(IEEE80211_NUM_TIDS) > 1); 1696 sta->driver_buffered_tids = 0; 1697 sta->txq_buffered_tids = 0; 1698 1699 if (!ieee80211_hw_check(&local->hw, AP_LINK_PS)) 1700 drv_sta_notify(local, sdata, STA_NOTIFY_AWAKE, &sta->sta); 1701 1702 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) { 1703 if (!sta->sta.txq[i] || !txq_has_queue(sta->sta.txq[i])) 1704 continue; 1705 1706 schedule_and_wake_txq(local, to_txq_info(sta->sta.txq[i])); 1707 } 1708 1709 skb_queue_head_init(&pending); 1710 1711 /* sync with ieee80211_tx_h_unicast_ps_buf */ 1712 spin_lock(&sta->ps_lock); 1713 /* Send all buffered frames to the station */ 1714 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1715 int count = skb_queue_len(&pending), tmp; 1716 1717 spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags); 1718 skb_queue_splice_tail_init(&sta->tx_filtered[ac], &pending); 1719 spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags); 1720 tmp = skb_queue_len(&pending); 1721 filtered += tmp - count; 1722 count = tmp; 1723 1724 spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags); 1725 skb_queue_splice_tail_init(&sta->ps_tx_buf[ac], &pending); 1726 spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags); 1727 tmp = skb_queue_len(&pending); 1728 buffered += tmp - count; 1729 } 1730 1731 ieee80211_add_pending_skbs(local, &pending); 1732 1733 /* now we're no longer in the deliver code */ 1734 clear_sta_flag(sta, WLAN_STA_PS_DELIVER); 1735 1736 /* The station might have polled and then woken up before we responded, 1737 * so clear these flags now to avoid them sticking around. 1738 */ 1739 clear_sta_flag(sta, WLAN_STA_PSPOLL); 1740 clear_sta_flag(sta, WLAN_STA_UAPSD); 1741 spin_unlock(&sta->ps_lock); 1742 1743 atomic_dec(&ps->num_sta_ps); 1744 1745 local->total_ps_buffered -= buffered; 1746 1747 sta_info_recalc_tim(sta); 1748 1749 ps_dbg(sdata, 1750 "STA %pM aid %d sending %d filtered/%d PS frames since STA woke up\n", 1751 sta->sta.addr, sta->sta.aid, filtered, buffered); 1752 1753 ieee80211_check_fast_xmit(sta); 1754} 1755 1756static void ieee80211_send_null_response(struct sta_info *sta, int tid, 1757 enum ieee80211_frame_release_type reason, 1758 bool call_driver, bool more_data) 1759{ 1760 struct ieee80211_sub_if_data *sdata = sta->sdata; 1761 struct ieee80211_local *local = sdata->local; 1762 struct ieee80211_qos_hdr *nullfunc; 1763 struct sk_buff *skb; 1764 int size = sizeof(*nullfunc); 1765 __le16 fc; 1766 bool qos = sta->sta.wme; 1767 struct ieee80211_tx_info *info; 1768 struct ieee80211_chanctx_conf *chanctx_conf; 1769 1770 if (qos) { 1771 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | 1772 IEEE80211_STYPE_QOS_NULLFUNC | 1773 IEEE80211_FCTL_FROMDS); 1774 } else { 1775 size -= 2; 1776 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | 1777 IEEE80211_STYPE_NULLFUNC | 1778 IEEE80211_FCTL_FROMDS); 1779 } 1780 1781 skb = dev_alloc_skb(local->hw.extra_tx_headroom + size); 1782 if (!skb) 1783 return; 1784 1785 skb_reserve(skb, local->hw.extra_tx_headroom); 1786 1787 nullfunc = skb_put(skb, size); 1788 nullfunc->frame_control = fc; 1789 nullfunc->duration_id = 0; 1790 memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN); 1791 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 1792 memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN); 1793 nullfunc->seq_ctrl = 0; 1794 1795 skb->priority = tid; 1796 skb_set_queue_mapping(skb, ieee802_1d_to_ac[tid]); 1797 if (qos) { 1798 nullfunc->qos_ctrl = cpu_to_le16(tid); 1799 1800 if (reason == IEEE80211_FRAME_RELEASE_UAPSD) { 1801 nullfunc->qos_ctrl |= 1802 cpu_to_le16(IEEE80211_QOS_CTL_EOSP); 1803 if (more_data) 1804 nullfunc->frame_control |= 1805 cpu_to_le16(IEEE80211_FCTL_MOREDATA); 1806 } 1807 } 1808 1809 info = IEEE80211_SKB_CB(skb); 1810 1811 /* 1812 * Tell TX path to send this frame even though the 1813 * STA may still remain is PS mode after this frame 1814 * exchange. Also set EOSP to indicate this packet 1815 * ends the poll/service period. 1816 */ 1817 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER | 1818 IEEE80211_TX_STATUS_EOSP | 1819 IEEE80211_TX_CTL_REQ_TX_STATUS; 1820 1821 info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE; 1822 1823 if (call_driver) 1824 drv_allow_buffered_frames(local, sta, BIT(tid), 1, 1825 reason, false); 1826 1827 skb->dev = sdata->dev; 1828 1829 rcu_read_lock(); 1830 chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf); 1831 if (WARN_ON(!chanctx_conf)) { 1832 rcu_read_unlock(); 1833 kfree_skb(skb); 1834 return; 1835 } 1836 1837 info->band = chanctx_conf->def.chan->band; 1838 ieee80211_xmit(sdata, sta, skb); 1839 rcu_read_unlock(); 1840} 1841 1842static int find_highest_prio_tid(unsigned long tids) 1843{ 1844 /* lower 3 TIDs aren't ordered perfectly */ 1845 if (tids & 0xF8) 1846 return fls(tids) - 1; 1847 /* TID 0 is BE just like TID 3 */ 1848 if (tids & BIT(0)) 1849 return 0; 1850 return fls(tids) - 1; 1851} 1852 1853/* Indicates if the MORE_DATA bit should be set in the last 1854 * frame obtained by ieee80211_sta_ps_get_frames. 1855 * Note that driver_release_tids is relevant only if 1856 * reason = IEEE80211_FRAME_RELEASE_PSPOLL 1857 */ 1858static bool 1859ieee80211_sta_ps_more_data(struct sta_info *sta, u8 ignored_acs, 1860 enum ieee80211_frame_release_type reason, 1861 unsigned long driver_release_tids) 1862{ 1863 int ac; 1864 1865 /* If the driver has data on more than one TID then 1866 * certainly there's more data if we release just a 1867 * single frame now (from a single TID). This will 1868 * only happen for PS-Poll. 1869 */ 1870 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL && 1871 hweight16(driver_release_tids) > 1) 1872 return true; 1873 1874 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1875 if (ignored_acs & ieee80211_ac_to_qos_mask[ac]) 1876 continue; 1877 1878 if (!skb_queue_empty(&sta->tx_filtered[ac]) || 1879 !skb_queue_empty(&sta->ps_tx_buf[ac])) 1880 return true; 1881 } 1882 1883 return false; 1884} 1885 1886static void 1887ieee80211_sta_ps_get_frames(struct sta_info *sta, int n_frames, u8 ignored_acs, 1888 enum ieee80211_frame_release_type reason, 1889 struct sk_buff_head *frames, 1890 unsigned long *driver_release_tids) 1891{ 1892 struct ieee80211_sub_if_data *sdata = sta->sdata; 1893 struct ieee80211_local *local = sdata->local; 1894 int ac; 1895 1896 /* Get response frame(s) and more data bit for the last one. */ 1897 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1898 unsigned long tids; 1899 1900 if (ignored_acs & ieee80211_ac_to_qos_mask[ac]) 1901 continue; 1902 1903 tids = ieee80211_tids_for_ac(ac); 1904 1905 /* if we already have frames from software, then we can't also 1906 * release from hardware queues 1907 */ 1908 if (skb_queue_empty(frames)) { 1909 *driver_release_tids |= 1910 sta->driver_buffered_tids & tids; 1911 *driver_release_tids |= sta->txq_buffered_tids & tids; 1912 } 1913 1914 if (!*driver_release_tids) { 1915 struct sk_buff *skb; 1916 1917 while (n_frames > 0) { 1918 skb = skb_dequeue(&sta->tx_filtered[ac]); 1919 if (!skb) { 1920 skb = skb_dequeue( 1921 &sta->ps_tx_buf[ac]); 1922 if (skb) 1923 local->total_ps_buffered--; 1924 } 1925 if (!skb) 1926 break; 1927 n_frames--; 1928 __skb_queue_tail(frames, skb); 1929 } 1930 } 1931 1932 /* If we have more frames buffered on this AC, then abort the 1933 * loop since we can't send more data from other ACs before 1934 * the buffered frames from this. 1935 */ 1936 if (!skb_queue_empty(&sta->tx_filtered[ac]) || 1937 !skb_queue_empty(&sta->ps_tx_buf[ac])) 1938 break; 1939 } 1940} 1941 1942static void 1943ieee80211_sta_ps_deliver_response(struct sta_info *sta, 1944 int n_frames, u8 ignored_acs, 1945 enum ieee80211_frame_release_type reason) 1946{ 1947 struct ieee80211_sub_if_data *sdata = sta->sdata; 1948 struct ieee80211_local *local = sdata->local; 1949 unsigned long driver_release_tids = 0; 1950 struct sk_buff_head frames; 1951 bool more_data; 1952 1953 /* Service or PS-Poll period starts */ 1954 set_sta_flag(sta, WLAN_STA_SP); 1955 1956 __skb_queue_head_init(&frames); 1957 1958 ieee80211_sta_ps_get_frames(sta, n_frames, ignored_acs, reason, 1959 &frames, &driver_release_tids); 1960 1961 more_data = ieee80211_sta_ps_more_data(sta, ignored_acs, reason, driver_release_tids); 1962 1963 if (driver_release_tids && reason == IEEE80211_FRAME_RELEASE_PSPOLL) 1964 driver_release_tids = 1965 BIT(find_highest_prio_tid(driver_release_tids)); 1966 1967 if (skb_queue_empty(&frames) && !driver_release_tids) { 1968 int tid, ac; 1969 1970 /* 1971 * For PS-Poll, this can only happen due to a race condition 1972 * when we set the TIM bit and the station notices it, but 1973 * before it can poll for the frame we expire it. 1974 * 1975 * For uAPSD, this is said in the standard (11.2.1.5 h): 1976 * At each unscheduled SP for a non-AP STA, the AP shall 1977 * attempt to transmit at least one MSDU or MMPDU, but no 1978 * more than the value specified in the Max SP Length field 1979 * in the QoS Capability element from delivery-enabled ACs, 1980 * that are destined for the non-AP STA. 1981 * 1982 * Since we have no other MSDU/MMPDU, transmit a QoS null frame. 1983 */ 1984 1985 /* This will evaluate to 1, 3, 5 or 7. */ 1986 for (ac = IEEE80211_AC_VO; ac < IEEE80211_NUM_ACS; ac++) 1987 if (!(ignored_acs & ieee80211_ac_to_qos_mask[ac])) 1988 break; 1989 tid = 7 - 2 * ac; 1990 1991 ieee80211_send_null_response(sta, tid, reason, true, false); 1992 } else if (!driver_release_tids) { 1993 struct sk_buff_head pending; 1994 struct sk_buff *skb; 1995 int num = 0; 1996 u16 tids = 0; 1997 bool need_null = false; 1998 1999 skb_queue_head_init(&pending); 2000 2001 while ((skb = __skb_dequeue(&frames))) { 2002 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 2003 struct ieee80211_hdr *hdr = (void *) skb->data; 2004 u8 *qoshdr = NULL; 2005 2006 num++; 2007 2008 /* 2009 * Tell TX path to send this frame even though the 2010 * STA may still remain is PS mode after this frame 2011 * exchange. 2012 */ 2013 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER; 2014 info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE; 2015 2016 /* 2017 * Use MoreData flag to indicate whether there are 2018 * more buffered frames for this STA 2019 */ 2020 if (more_data || !skb_queue_empty(&frames)) 2021 hdr->frame_control |= 2022 cpu_to_le16(IEEE80211_FCTL_MOREDATA); 2023 else 2024 hdr->frame_control &= 2025 cpu_to_le16(~IEEE80211_FCTL_MOREDATA); 2026 2027 if (ieee80211_is_data_qos(hdr->frame_control) || 2028 ieee80211_is_qos_nullfunc(hdr->frame_control)) 2029 qoshdr = ieee80211_get_qos_ctl(hdr); 2030 2031 tids |= BIT(skb->priority); 2032 2033 __skb_queue_tail(&pending, skb); 2034 2035 /* end service period after last frame or add one */ 2036 if (!skb_queue_empty(&frames)) 2037 continue; 2038 2039 if (reason != IEEE80211_FRAME_RELEASE_UAPSD) { 2040 /* for PS-Poll, there's only one frame */ 2041 info->flags |= IEEE80211_TX_STATUS_EOSP | 2042 IEEE80211_TX_CTL_REQ_TX_STATUS; 2043 break; 2044 } 2045 2046 /* For uAPSD, things are a bit more complicated. If the 2047 * last frame has a QoS header (i.e. is a QoS-data or 2048 * QoS-nulldata frame) then just set the EOSP bit there 2049 * and be done. 2050 * If the frame doesn't have a QoS header (which means 2051 * it should be a bufferable MMPDU) then we can't set 2052 * the EOSP bit in the QoS header; add a QoS-nulldata 2053 * frame to the list to send it after the MMPDU. 2054 * 2055 * Note that this code is only in the mac80211-release 2056 * code path, we assume that the driver will not buffer 2057 * anything but QoS-data frames, or if it does, will 2058 * create the QoS-nulldata frame by itself if needed. 2059 * 2060 * Cf. 802.11-2012 10.2.1.10 (c). 2061 */ 2062 if (qoshdr) { 2063 *qoshdr |= IEEE80211_QOS_CTL_EOSP; 2064 2065 info->flags |= IEEE80211_TX_STATUS_EOSP | 2066 IEEE80211_TX_CTL_REQ_TX_STATUS; 2067 } else { 2068 /* The standard isn't completely clear on this 2069 * as it says the more-data bit should be set 2070 * if there are more BUs. The QoS-Null frame 2071 * we're about to send isn't buffered yet, we 2072 * only create it below, but let's pretend it 2073 * was buffered just in case some clients only 2074 * expect more-data=0 when eosp=1. 2075 */ 2076 hdr->frame_control |= 2077 cpu_to_le16(IEEE80211_FCTL_MOREDATA); 2078 need_null = true; 2079 num++; 2080 } 2081 break; 2082 } 2083 2084 drv_allow_buffered_frames(local, sta, tids, num, 2085 reason, more_data); 2086 2087 ieee80211_add_pending_skbs(local, &pending); 2088 2089 if (need_null) 2090 ieee80211_send_null_response( 2091 sta, find_highest_prio_tid(tids), 2092 reason, false, false); 2093 2094 sta_info_recalc_tim(sta); 2095 } else { 2096 int tid; 2097 2098 /* 2099 * We need to release a frame that is buffered somewhere in the 2100 * driver ... it'll have to handle that. 2101 * Note that the driver also has to check the number of frames 2102 * on the TIDs we're releasing from - if there are more than 2103 * n_frames it has to set the more-data bit (if we didn't ask 2104 * it to set it anyway due to other buffered frames); if there 2105 * are fewer than n_frames it has to make sure to adjust that 2106 * to allow the service period to end properly. 2107 */ 2108 drv_release_buffered_frames(local, sta, driver_release_tids, 2109 n_frames, reason, more_data); 2110 2111 /* 2112 * Note that we don't recalculate the TIM bit here as it would 2113 * most likely have no effect at all unless the driver told us 2114 * that the TID(s) became empty before returning here from the 2115 * release function. 2116 * Either way, however, when the driver tells us that the TID(s) 2117 * became empty or we find that a txq became empty, we'll do the 2118 * TIM recalculation. 2119 */ 2120 2121 for (tid = 0; tid < ARRAY_SIZE(sta->sta.txq); tid++) { 2122 if (!sta->sta.txq[tid] || 2123 !(driver_release_tids & BIT(tid)) || 2124 txq_has_queue(sta->sta.txq[tid])) 2125 continue; 2126 2127 sta_info_recalc_tim(sta); 2128 break; 2129 } 2130 } 2131} 2132 2133void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta) 2134{ 2135 u8 ignore_for_response = sta->sta.uapsd_queues; 2136 2137 /* 2138 * If all ACs are delivery-enabled then we should reply 2139 * from any of them, if only some are enabled we reply 2140 * only from the non-enabled ones. 2141 */ 2142 if (ignore_for_response == BIT(IEEE80211_NUM_ACS) - 1) 2143 ignore_for_response = 0; 2144 2145 ieee80211_sta_ps_deliver_response(sta, 1, ignore_for_response, 2146 IEEE80211_FRAME_RELEASE_PSPOLL); 2147} 2148 2149void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta) 2150{ 2151 int n_frames = sta->sta.max_sp; 2152 u8 delivery_enabled = sta->sta.uapsd_queues; 2153 2154 /* 2155 * If we ever grow support for TSPEC this might happen if 2156 * the TSPEC update from hostapd comes in between a trigger 2157 * frame setting WLAN_STA_UAPSD in the RX path and this 2158 * actually getting called. 2159 */ 2160 if (!delivery_enabled) 2161 return; 2162 2163 switch (sta->sta.max_sp) { 2164 case 1: 2165 n_frames = 2; 2166 break; 2167 case 2: 2168 n_frames = 4; 2169 break; 2170 case 3: 2171 n_frames = 6; 2172 break; 2173 case 0: 2174 /* XXX: what is a good value? */ 2175 n_frames = 128; 2176 break; 2177 } 2178 2179 ieee80211_sta_ps_deliver_response(sta, n_frames, ~delivery_enabled, 2180 IEEE80211_FRAME_RELEASE_UAPSD); 2181} 2182 2183void ieee80211_sta_block_awake(struct ieee80211_hw *hw, 2184 struct ieee80211_sta *pubsta, bool block) 2185{ 2186 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 2187 2188 trace_api_sta_block_awake(sta->local, pubsta, block); 2189 2190 if (block) { 2191 set_sta_flag(sta, WLAN_STA_PS_DRIVER); 2192 ieee80211_clear_fast_xmit(sta); 2193 return; 2194 } 2195 2196 if (!test_sta_flag(sta, WLAN_STA_PS_DRIVER)) 2197 return; 2198 2199 if (!test_sta_flag(sta, WLAN_STA_PS_STA)) { 2200 set_sta_flag(sta, WLAN_STA_PS_DELIVER); 2201 clear_sta_flag(sta, WLAN_STA_PS_DRIVER); 2202 ieee80211_queue_work(hw, &sta->drv_deliver_wk); 2203 } else if (test_sta_flag(sta, WLAN_STA_PSPOLL) || 2204 test_sta_flag(sta, WLAN_STA_UAPSD)) { 2205 /* must be asleep in this case */ 2206 clear_sta_flag(sta, WLAN_STA_PS_DRIVER); 2207 ieee80211_queue_work(hw, &sta->drv_deliver_wk); 2208 } else { 2209 clear_sta_flag(sta, WLAN_STA_PS_DRIVER); 2210 ieee80211_check_fast_xmit(sta); 2211 } 2212} 2213EXPORT_SYMBOL(ieee80211_sta_block_awake); 2214 2215void ieee80211_sta_eosp(struct ieee80211_sta *pubsta) 2216{ 2217 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 2218 struct ieee80211_local *local = sta->local; 2219 2220 trace_api_eosp(local, pubsta); 2221 2222 clear_sta_flag(sta, WLAN_STA_SP); 2223} 2224EXPORT_SYMBOL(ieee80211_sta_eosp); 2225 2226void ieee80211_send_eosp_nullfunc(struct ieee80211_sta *pubsta, int tid) 2227{ 2228 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 2229 enum ieee80211_frame_release_type reason; 2230 bool more_data; 2231 2232 trace_api_send_eosp_nullfunc(sta->local, pubsta, tid); 2233 2234 reason = IEEE80211_FRAME_RELEASE_UAPSD; 2235 more_data = ieee80211_sta_ps_more_data(sta, ~sta->sta.uapsd_queues, 2236 reason, 0); 2237 2238 ieee80211_send_null_response(sta, tid, reason, false, more_data); 2239} 2240EXPORT_SYMBOL(ieee80211_send_eosp_nullfunc); 2241 2242void ieee80211_sta_set_buffered(struct ieee80211_sta *pubsta, 2243 u8 tid, bool buffered) 2244{ 2245 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 2246 2247 if (WARN_ON(tid >= IEEE80211_NUM_TIDS)) 2248 return; 2249 2250 trace_api_sta_set_buffered(sta->local, pubsta, tid, buffered); 2251 2252 if (buffered) 2253 set_bit(tid, &sta->driver_buffered_tids); 2254 else 2255 clear_bit(tid, &sta->driver_buffered_tids); 2256 2257 sta_info_recalc_tim(sta); 2258} 2259EXPORT_SYMBOL(ieee80211_sta_set_buffered); 2260 2261void ieee80211_sta_register_airtime(struct ieee80211_sta *pubsta, u8 tid, 2262 u32 tx_airtime, u32 rx_airtime) 2263{ 2264 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 2265 struct ieee80211_local *local = sta->sdata->local; 2266 u8 ac = ieee80211_ac_from_tid(tid); 2267 u32 airtime = 0; 2268 u32 diff; 2269 2270 if (sta->local->airtime_flags & AIRTIME_USE_TX) 2271 airtime += tx_airtime; 2272 if (sta->local->airtime_flags & AIRTIME_USE_RX) 2273 airtime += rx_airtime; 2274 2275 spin_lock_bh(&local->active_txq_lock[ac]); 2276 sta->airtime[ac].tx_airtime += tx_airtime; 2277 sta->airtime[ac].rx_airtime += rx_airtime; 2278 2279 diff = (u32)jiffies - sta->airtime[ac].last_active; 2280 if (diff <= AIRTIME_ACTIVE_DURATION) 2281 sta->airtime[ac].deficit -= airtime; 2282 2283 spin_unlock_bh(&local->active_txq_lock[ac]); 2284} 2285EXPORT_SYMBOL(ieee80211_sta_register_airtime); 2286 2287void __ieee80211_sta_recalc_aggregates(struct sta_info *sta, u16 active_links) 2288{ 2289 bool first = true; 2290 int link_id; 2291 2292 if (!sta->sta.valid_links || !sta->sta.mlo) { 2293 sta->sta.cur = &sta->sta.deflink.agg; 2294 return; 2295 } 2296 2297 rcu_read_lock(); 2298 for (link_id = 0; link_id < ARRAY_SIZE((sta)->link); link_id++) { 2299 struct ieee80211_link_sta *link_sta; 2300 int i; 2301 2302 if (!(active_links & BIT(link_id))) 2303 continue; 2304 2305 link_sta = rcu_dereference(sta->sta.link[link_id]); 2306 if (!link_sta) 2307 continue; 2308 2309 if (first) { 2310 sta->cur = sta->sta.deflink.agg; 2311 first = false; 2312 continue; 2313 } 2314 2315 sta->cur.max_amsdu_len = 2316 min(sta->cur.max_amsdu_len, 2317 link_sta->agg.max_amsdu_len); 2318 sta->cur.max_rc_amsdu_len = 2319 min(sta->cur.max_rc_amsdu_len, 2320 link_sta->agg.max_rc_amsdu_len); 2321 2322 for (i = 0; i < ARRAY_SIZE(sta->cur.max_tid_amsdu_len); i++) 2323 sta->cur.max_tid_amsdu_len[i] = 2324 min(sta->cur.max_tid_amsdu_len[i], 2325 link_sta->agg.max_tid_amsdu_len[i]); 2326 } 2327 rcu_read_unlock(); 2328 2329 sta->sta.cur = &sta->cur; 2330} 2331 2332void ieee80211_sta_recalc_aggregates(struct ieee80211_sta *pubsta) 2333{ 2334 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 2335 2336 __ieee80211_sta_recalc_aggregates(sta, sta->sdata->vif.active_links); 2337} 2338EXPORT_SYMBOL(ieee80211_sta_recalc_aggregates); 2339 2340void ieee80211_sta_update_pending_airtime(struct ieee80211_local *local, 2341 struct sta_info *sta, u8 ac, 2342 u16 tx_airtime, bool tx_completed) 2343{ 2344 int tx_pending; 2345 2346 if (!wiphy_ext_feature_isset(local->hw.wiphy, NL80211_EXT_FEATURE_AQL)) 2347 return; 2348 2349 if (!tx_completed) { 2350 if (sta) 2351 atomic_add(tx_airtime, 2352 &sta->airtime[ac].aql_tx_pending); 2353 2354 atomic_add(tx_airtime, &local->aql_total_pending_airtime); 2355 atomic_add(tx_airtime, &local->aql_ac_pending_airtime[ac]); 2356 return; 2357 } 2358 2359 if (sta) { 2360 tx_pending = atomic_sub_return(tx_airtime, 2361 &sta->airtime[ac].aql_tx_pending); 2362 if (tx_pending < 0) 2363 atomic_cmpxchg(&sta->airtime[ac].aql_tx_pending, 2364 tx_pending, 0); 2365 } 2366 2367 atomic_sub(tx_airtime, &local->aql_total_pending_airtime); 2368 tx_pending = atomic_sub_return(tx_airtime, 2369 &local->aql_ac_pending_airtime[ac]); 2370 if (WARN_ONCE(tx_pending < 0, 2371 "Device %s AC %d pending airtime underflow: %u, %u", 2372 wiphy_name(local->hw.wiphy), ac, tx_pending, 2373 tx_airtime)) { 2374 atomic_cmpxchg(&local->aql_ac_pending_airtime[ac], 2375 tx_pending, 0); 2376 atomic_sub(tx_pending, &local->aql_total_pending_airtime); 2377 } 2378} 2379 2380static struct ieee80211_sta_rx_stats * 2381sta_get_last_rx_stats(struct sta_info *sta) 2382{ 2383 struct ieee80211_sta_rx_stats *stats = &sta->deflink.rx_stats; 2384 int cpu; 2385 2386 if (!sta->deflink.pcpu_rx_stats) 2387 return stats; 2388 2389 for_each_possible_cpu(cpu) { 2390 struct ieee80211_sta_rx_stats *cpustats; 2391 2392 cpustats = per_cpu_ptr(sta->deflink.pcpu_rx_stats, cpu); 2393 2394 if (time_after(cpustats->last_rx, stats->last_rx)) 2395 stats = cpustats; 2396 } 2397 2398 return stats; 2399} 2400 2401static void sta_stats_decode_rate(struct ieee80211_local *local, u32 rate, 2402 struct rate_info *rinfo) 2403{ 2404 rinfo->bw = STA_STATS_GET(BW, rate); 2405 2406 switch (STA_STATS_GET(TYPE, rate)) { 2407 case STA_STATS_RATE_TYPE_VHT: 2408 rinfo->flags = RATE_INFO_FLAGS_VHT_MCS; 2409 rinfo->mcs = STA_STATS_GET(VHT_MCS, rate); 2410 rinfo->nss = STA_STATS_GET(VHT_NSS, rate); 2411 if (STA_STATS_GET(SGI, rate)) 2412 rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI; 2413 break; 2414 case STA_STATS_RATE_TYPE_HT: 2415 rinfo->flags = RATE_INFO_FLAGS_MCS; 2416 rinfo->mcs = STA_STATS_GET(HT_MCS, rate); 2417 if (STA_STATS_GET(SGI, rate)) 2418 rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI; 2419 break; 2420 case STA_STATS_RATE_TYPE_LEGACY: { 2421 struct ieee80211_supported_band *sband; 2422 u16 brate; 2423 unsigned int shift; 2424 int band = STA_STATS_GET(LEGACY_BAND, rate); 2425 int rate_idx = STA_STATS_GET(LEGACY_IDX, rate); 2426 2427 sband = local->hw.wiphy->bands[band]; 2428 2429 if (WARN_ON_ONCE(!sband->bitrates)) 2430 break; 2431 2432 brate = sband->bitrates[rate_idx].bitrate; 2433 if (rinfo->bw == RATE_INFO_BW_5) 2434 shift = 2; 2435 else if (rinfo->bw == RATE_INFO_BW_10) 2436 shift = 1; 2437 else 2438 shift = 0; 2439 rinfo->legacy = DIV_ROUND_UP(brate, 1 << shift); 2440 break; 2441 } 2442 case STA_STATS_RATE_TYPE_HE: 2443 rinfo->flags = RATE_INFO_FLAGS_HE_MCS; 2444 rinfo->mcs = STA_STATS_GET(HE_MCS, rate); 2445 rinfo->nss = STA_STATS_GET(HE_NSS, rate); 2446 rinfo->he_gi = STA_STATS_GET(HE_GI, rate); 2447 rinfo->he_ru_alloc = STA_STATS_GET(HE_RU, rate); 2448 rinfo->he_dcm = STA_STATS_GET(HE_DCM, rate); 2449 break; 2450 case STA_STATS_RATE_TYPE_EHT: 2451 rinfo->flags = RATE_INFO_FLAGS_EHT_MCS; 2452 rinfo->mcs = STA_STATS_GET(EHT_MCS, rate); 2453 rinfo->nss = STA_STATS_GET(EHT_NSS, rate); 2454 rinfo->eht_gi = STA_STATS_GET(EHT_GI, rate); 2455 rinfo->eht_ru_alloc = STA_STATS_GET(EHT_RU, rate); 2456 break; 2457 } 2458} 2459 2460static int sta_set_rate_info_rx(struct sta_info *sta, struct rate_info *rinfo) 2461{ 2462 u32 rate = READ_ONCE(sta_get_last_rx_stats(sta)->last_rate); 2463 2464 if (rate == STA_STATS_RATE_INVALID) 2465 return -EINVAL; 2466 2467 sta_stats_decode_rate(sta->local, rate, rinfo); 2468 return 0; 2469} 2470 2471static inline u64 sta_get_tidstats_msdu(struct ieee80211_sta_rx_stats *rxstats, 2472 int tid) 2473{ 2474 unsigned int start; 2475 u64 value; 2476 2477 do { 2478 start = u64_stats_fetch_begin(&rxstats->syncp); 2479 value = rxstats->msdu[tid]; 2480 } while (u64_stats_fetch_retry(&rxstats->syncp, start)); 2481 2482 return value; 2483} 2484 2485static void sta_set_tidstats(struct sta_info *sta, 2486 struct cfg80211_tid_stats *tidstats, 2487 int tid) 2488{ 2489 struct ieee80211_local *local = sta->local; 2490 int cpu; 2491 2492 if (!(tidstats->filled & BIT(NL80211_TID_STATS_RX_MSDU))) { 2493 tidstats->rx_msdu += sta_get_tidstats_msdu(&sta->deflink.rx_stats, 2494 tid); 2495 2496 if (sta->deflink.pcpu_rx_stats) { 2497 for_each_possible_cpu(cpu) { 2498 struct ieee80211_sta_rx_stats *cpurxs; 2499 2500 cpurxs = per_cpu_ptr(sta->deflink.pcpu_rx_stats, 2501 cpu); 2502 tidstats->rx_msdu += 2503 sta_get_tidstats_msdu(cpurxs, tid); 2504 } 2505 } 2506 2507 tidstats->filled |= BIT(NL80211_TID_STATS_RX_MSDU); 2508 } 2509 2510 if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU))) { 2511 tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU); 2512 tidstats->tx_msdu = sta->deflink.tx_stats.msdu[tid]; 2513 } 2514 2515 if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU_RETRIES)) && 2516 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 2517 tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU_RETRIES); 2518 tidstats->tx_msdu_retries = sta->deflink.status_stats.msdu_retries[tid]; 2519 } 2520 2521 if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU_FAILED)) && 2522 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 2523 tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU_FAILED); 2524 tidstats->tx_msdu_failed = sta->deflink.status_stats.msdu_failed[tid]; 2525 } 2526 2527 if (tid < IEEE80211_NUM_TIDS) { 2528 spin_lock_bh(&local->fq.lock); 2529 rcu_read_lock(); 2530 2531 tidstats->filled |= BIT(NL80211_TID_STATS_TXQ_STATS); 2532 ieee80211_fill_txq_stats(&tidstats->txq_stats, 2533 to_txq_info(sta->sta.txq[tid])); 2534 2535 rcu_read_unlock(); 2536 spin_unlock_bh(&local->fq.lock); 2537 } 2538} 2539 2540static inline u64 sta_get_stats_bytes(struct ieee80211_sta_rx_stats *rxstats) 2541{ 2542 unsigned int start; 2543 u64 value; 2544 2545 do { 2546 start = u64_stats_fetch_begin(&rxstats->syncp); 2547 value = rxstats->bytes; 2548 } while (u64_stats_fetch_retry(&rxstats->syncp, start)); 2549 2550 return value; 2551} 2552 2553void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo, 2554 bool tidstats) 2555{ 2556 struct ieee80211_sub_if_data *sdata = sta->sdata; 2557 struct ieee80211_local *local = sdata->local; 2558 u32 thr = 0; 2559 int i, ac, cpu; 2560 struct ieee80211_sta_rx_stats *last_rxstats; 2561 2562 last_rxstats = sta_get_last_rx_stats(sta); 2563 2564 sinfo->generation = sdata->local->sta_generation; 2565 2566 /* do before driver, so beacon filtering drivers have a 2567 * chance to e.g. just add the number of filtered beacons 2568 * (or just modify the value entirely, of course) 2569 */ 2570 if (sdata->vif.type == NL80211_IFTYPE_STATION) 2571 sinfo->rx_beacon = sdata->deflink.u.mgd.count_beacon_signal; 2572 2573 drv_sta_statistics(local, sdata, &sta->sta, sinfo); 2574 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_INACTIVE_TIME) | 2575 BIT_ULL(NL80211_STA_INFO_STA_FLAGS) | 2576 BIT_ULL(NL80211_STA_INFO_BSS_PARAM) | 2577 BIT_ULL(NL80211_STA_INFO_CONNECTED_TIME) | 2578 BIT_ULL(NL80211_STA_INFO_ASSOC_AT_BOOTTIME) | 2579 BIT_ULL(NL80211_STA_INFO_RX_DROP_MISC); 2580 2581 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 2582 sinfo->beacon_loss_count = 2583 sdata->deflink.u.mgd.beacon_loss_count; 2584 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_BEACON_LOSS); 2585 } 2586 2587 sinfo->connected_time = ktime_get_seconds() - sta->last_connected; 2588 sinfo->assoc_at = sta->assoc_at; 2589 sinfo->inactive_time = 2590 jiffies_to_msecs(jiffies - ieee80211_sta_last_active(sta)); 2591 2592 if (!(sinfo->filled & (BIT_ULL(NL80211_STA_INFO_TX_BYTES64) | 2593 BIT_ULL(NL80211_STA_INFO_TX_BYTES)))) { 2594 sinfo->tx_bytes = 0; 2595 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 2596 sinfo->tx_bytes += sta->deflink.tx_stats.bytes[ac]; 2597 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_BYTES64); 2598 } 2599 2600 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_PACKETS))) { 2601 sinfo->tx_packets = 0; 2602 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 2603 sinfo->tx_packets += sta->deflink.tx_stats.packets[ac]; 2604 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_PACKETS); 2605 } 2606 2607 if (!(sinfo->filled & (BIT_ULL(NL80211_STA_INFO_RX_BYTES64) | 2608 BIT_ULL(NL80211_STA_INFO_RX_BYTES)))) { 2609 sinfo->rx_bytes += sta_get_stats_bytes(&sta->deflink.rx_stats); 2610 2611 if (sta->deflink.pcpu_rx_stats) { 2612 for_each_possible_cpu(cpu) { 2613 struct ieee80211_sta_rx_stats *cpurxs; 2614 2615 cpurxs = per_cpu_ptr(sta->deflink.pcpu_rx_stats, 2616 cpu); 2617 sinfo->rx_bytes += sta_get_stats_bytes(cpurxs); 2618 } 2619 } 2620 2621 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_BYTES64); 2622 } 2623 2624 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_RX_PACKETS))) { 2625 sinfo->rx_packets = sta->deflink.rx_stats.packets; 2626 if (sta->deflink.pcpu_rx_stats) { 2627 for_each_possible_cpu(cpu) { 2628 struct ieee80211_sta_rx_stats *cpurxs; 2629 2630 cpurxs = per_cpu_ptr(sta->deflink.pcpu_rx_stats, 2631 cpu); 2632 sinfo->rx_packets += cpurxs->packets; 2633 } 2634 } 2635 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_PACKETS); 2636 } 2637 2638 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_RETRIES))) { 2639 sinfo->tx_retries = sta->deflink.status_stats.retry_count; 2640 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_RETRIES); 2641 } 2642 2643 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_FAILED))) { 2644 sinfo->tx_failed = sta->deflink.status_stats.retry_failed; 2645 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_FAILED); 2646 } 2647 2648 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_RX_DURATION))) { 2649 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 2650 sinfo->rx_duration += sta->airtime[ac].rx_airtime; 2651 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_DURATION); 2652 } 2653 2654 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_DURATION))) { 2655 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 2656 sinfo->tx_duration += sta->airtime[ac].tx_airtime; 2657 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_DURATION); 2658 } 2659 2660 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_AIRTIME_WEIGHT))) { 2661 sinfo->airtime_weight = sta->airtime_weight; 2662 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_AIRTIME_WEIGHT); 2663 } 2664 2665 sinfo->rx_dropped_misc = sta->deflink.rx_stats.dropped; 2666 if (sta->deflink.pcpu_rx_stats) { 2667 for_each_possible_cpu(cpu) { 2668 struct ieee80211_sta_rx_stats *cpurxs; 2669 2670 cpurxs = per_cpu_ptr(sta->deflink.pcpu_rx_stats, cpu); 2671 sinfo->rx_dropped_misc += cpurxs->dropped; 2672 } 2673 } 2674 2675 if (sdata->vif.type == NL80211_IFTYPE_STATION && 2676 !(sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)) { 2677 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_BEACON_RX) | 2678 BIT_ULL(NL80211_STA_INFO_BEACON_SIGNAL_AVG); 2679 sinfo->rx_beacon_signal_avg = ieee80211_ave_rssi(&sdata->vif); 2680 } 2681 2682 if (ieee80211_hw_check(&sta->local->hw, SIGNAL_DBM) || 2683 ieee80211_hw_check(&sta->local->hw, SIGNAL_UNSPEC)) { 2684 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_SIGNAL))) { 2685 sinfo->signal = (s8)last_rxstats->last_signal; 2686 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_SIGNAL); 2687 } 2688 2689 if (!sta->deflink.pcpu_rx_stats && 2690 !(sinfo->filled & BIT_ULL(NL80211_STA_INFO_SIGNAL_AVG))) { 2691 sinfo->signal_avg = 2692 -ewma_signal_read(&sta->deflink.rx_stats_avg.signal); 2693 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_SIGNAL_AVG); 2694 } 2695 } 2696 2697 /* for the average - if pcpu_rx_stats isn't set - rxstats must point to 2698 * the sta->rx_stats struct, so the check here is fine with and without 2699 * pcpu statistics 2700 */ 2701 if (last_rxstats->chains && 2702 !(sinfo->filled & (BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL) | 2703 BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL_AVG)))) { 2704 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL); 2705 if (!sta->deflink.pcpu_rx_stats) 2706 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL_AVG); 2707 2708 sinfo->chains = last_rxstats->chains; 2709 2710 for (i = 0; i < ARRAY_SIZE(sinfo->chain_signal); i++) { 2711 sinfo->chain_signal[i] = 2712 last_rxstats->chain_signal_last[i]; 2713 sinfo->chain_signal_avg[i] = 2714 -ewma_signal_read(&sta->deflink.rx_stats_avg.chain_signal[i]); 2715 } 2716 } 2717 2718 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_BITRATE)) && 2719 !sta->sta.valid_links) { 2720 sta_set_rate_info_tx(sta, &sta->deflink.tx_stats.last_rate, 2721 &sinfo->txrate); 2722 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_BITRATE); 2723 } 2724 2725 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_RX_BITRATE)) && 2726 !sta->sta.valid_links) { 2727 if (sta_set_rate_info_rx(sta, &sinfo->rxrate) == 0) 2728 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_BITRATE); 2729 } 2730 2731 if (tidstats && !cfg80211_sinfo_alloc_tid_stats(sinfo, GFP_KERNEL)) { 2732 for (i = 0; i < IEEE80211_NUM_TIDS + 1; i++) 2733 sta_set_tidstats(sta, &sinfo->pertid[i], i); 2734 } 2735 2736 if (ieee80211_vif_is_mesh(&sdata->vif)) { 2737#ifdef CONFIG_MAC80211_MESH 2738 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_LLID) | 2739 BIT_ULL(NL80211_STA_INFO_PLID) | 2740 BIT_ULL(NL80211_STA_INFO_PLINK_STATE) | 2741 BIT_ULL(NL80211_STA_INFO_LOCAL_PM) | 2742 BIT_ULL(NL80211_STA_INFO_PEER_PM) | 2743 BIT_ULL(NL80211_STA_INFO_NONPEER_PM) | 2744 BIT_ULL(NL80211_STA_INFO_CONNECTED_TO_GATE) | 2745 BIT_ULL(NL80211_STA_INFO_CONNECTED_TO_AS); 2746 2747 sinfo->llid = sta->mesh->llid; 2748 sinfo->plid = sta->mesh->plid; 2749 sinfo->plink_state = sta->mesh->plink_state; 2750 if (test_sta_flag(sta, WLAN_STA_TOFFSET_KNOWN)) { 2751 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_T_OFFSET); 2752 sinfo->t_offset = sta->mesh->t_offset; 2753 } 2754 sinfo->local_pm = sta->mesh->local_pm; 2755 sinfo->peer_pm = sta->mesh->peer_pm; 2756 sinfo->nonpeer_pm = sta->mesh->nonpeer_pm; 2757 sinfo->connected_to_gate = sta->mesh->connected_to_gate; 2758 sinfo->connected_to_as = sta->mesh->connected_to_as; 2759#endif 2760 } 2761 2762 sinfo->bss_param.flags = 0; 2763 if (sdata->vif.bss_conf.use_cts_prot) 2764 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_CTS_PROT; 2765 if (sdata->vif.bss_conf.use_short_preamble) 2766 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_PREAMBLE; 2767 if (sdata->vif.bss_conf.use_short_slot) 2768 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_SLOT_TIME; 2769 sinfo->bss_param.dtim_period = sdata->vif.bss_conf.dtim_period; 2770 sinfo->bss_param.beacon_interval = sdata->vif.bss_conf.beacon_int; 2771 2772 sinfo->sta_flags.set = 0; 2773 sinfo->sta_flags.mask = BIT(NL80211_STA_FLAG_AUTHORIZED) | 2774 BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) | 2775 BIT(NL80211_STA_FLAG_WME) | 2776 BIT(NL80211_STA_FLAG_MFP) | 2777 BIT(NL80211_STA_FLAG_AUTHENTICATED) | 2778 BIT(NL80211_STA_FLAG_ASSOCIATED) | 2779 BIT(NL80211_STA_FLAG_TDLS_PEER); 2780 if (test_sta_flag(sta, WLAN_STA_AUTHORIZED)) 2781 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHORIZED); 2782 if (test_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE)) 2783 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE); 2784 if (sta->sta.wme) 2785 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_WME); 2786 if (test_sta_flag(sta, WLAN_STA_MFP)) 2787 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_MFP); 2788 if (test_sta_flag(sta, WLAN_STA_AUTH)) 2789 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHENTICATED); 2790 if (test_sta_flag(sta, WLAN_STA_ASSOC)) 2791 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_ASSOCIATED); 2792 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER)) 2793 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_TDLS_PEER); 2794 2795 thr = sta_get_expected_throughput(sta); 2796 2797 if (thr != 0) { 2798 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_EXPECTED_THROUGHPUT); 2799 sinfo->expected_throughput = thr; 2800 } 2801 2802 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL)) && 2803 sta->deflink.status_stats.ack_signal_filled) { 2804 sinfo->ack_signal = sta->deflink.status_stats.last_ack_signal; 2805 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL); 2806 } 2807 2808 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL_AVG)) && 2809 sta->deflink.status_stats.ack_signal_filled) { 2810 sinfo->avg_ack_signal = 2811 -(s8)ewma_avg_signal_read( 2812 &sta->deflink.status_stats.avg_ack_signal); 2813 sinfo->filled |= 2814 BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL_AVG); 2815 } 2816 2817 if (ieee80211_vif_is_mesh(&sdata->vif)) { 2818 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_AIRTIME_LINK_METRIC); 2819 sinfo->airtime_link_metric = 2820 airtime_link_metric_get(local, sta); 2821 } 2822} 2823 2824u32 sta_get_expected_throughput(struct sta_info *sta) 2825{ 2826 struct ieee80211_sub_if_data *sdata = sta->sdata; 2827 struct ieee80211_local *local = sdata->local; 2828 struct rate_control_ref *ref = NULL; 2829 u32 thr = 0; 2830 2831 if (test_sta_flag(sta, WLAN_STA_RATE_CONTROL)) 2832 ref = local->rate_ctrl; 2833 2834 /* check if the driver has a SW RC implementation */ 2835 if (ref && ref->ops->get_expected_throughput) 2836 thr = ref->ops->get_expected_throughput(sta->rate_ctrl_priv); 2837 else 2838 thr = drv_get_expected_throughput(local, sta); 2839 2840 return thr; 2841} 2842 2843unsigned long ieee80211_sta_last_active(struct sta_info *sta) 2844{ 2845 struct ieee80211_sta_rx_stats *stats = sta_get_last_rx_stats(sta); 2846 2847 if (!sta->deflink.status_stats.last_ack || 2848 time_after(stats->last_rx, sta->deflink.status_stats.last_ack)) 2849 return stats->last_rx; 2850 return sta->deflink.status_stats.last_ack; 2851} 2852 2853static void sta_update_codel_params(struct sta_info *sta, u32 thr) 2854{ 2855 if (thr && thr < STA_SLOW_THRESHOLD * sta->local->num_sta) { 2856 sta->cparams.target = MS2TIME(50); 2857 sta->cparams.interval = MS2TIME(300); 2858 sta->cparams.ecn = false; 2859 } else { 2860 sta->cparams.target = MS2TIME(20); 2861 sta->cparams.interval = MS2TIME(100); 2862 sta->cparams.ecn = true; 2863 } 2864} 2865 2866void ieee80211_sta_set_expected_throughput(struct ieee80211_sta *pubsta, 2867 u32 thr) 2868{ 2869 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 2870 2871 sta_update_codel_params(sta, thr); 2872} 2873 2874int ieee80211_sta_allocate_link(struct sta_info *sta, unsigned int link_id) 2875{ 2876 struct ieee80211_sub_if_data *sdata = sta->sdata; 2877 struct sta_link_alloc *alloc; 2878 int ret; 2879 2880 lockdep_assert_held(&sdata->local->sta_mtx); 2881 2882 /* must represent an MLD from the start */ 2883 if (WARN_ON(!sta->sta.valid_links)) 2884 return -EINVAL; 2885 2886 if (WARN_ON(sta->sta.valid_links & BIT(link_id) || 2887 sta->link[link_id])) 2888 return -EBUSY; 2889 2890 alloc = kzalloc(sizeof(*alloc), GFP_KERNEL); 2891 if (!alloc) 2892 return -ENOMEM; 2893 2894 ret = sta_info_alloc_link(sdata->local, &alloc->info, GFP_KERNEL); 2895 if (ret) { 2896 kfree(alloc); 2897 return ret; 2898 } 2899 2900 sta_info_add_link(sta, link_id, &alloc->info, &alloc->sta); 2901 2902 ieee80211_link_sta_debugfs_add(&alloc->info); 2903 2904 return 0; 2905} 2906 2907void ieee80211_sta_free_link(struct sta_info *sta, unsigned int link_id) 2908{ 2909 lockdep_assert_held(&sta->sdata->local->sta_mtx); 2910 2911 sta_remove_link(sta, link_id, false); 2912} 2913 2914int ieee80211_sta_activate_link(struct sta_info *sta, unsigned int link_id) 2915{ 2916 struct ieee80211_sub_if_data *sdata = sta->sdata; 2917 struct link_sta_info *link_sta; 2918 u16 old_links = sta->sta.valid_links; 2919 u16 new_links = old_links | BIT(link_id); 2920 int ret; 2921 2922 link_sta = rcu_dereference_protected(sta->link[link_id], 2923 lockdep_is_held(&sdata->local->sta_mtx)); 2924 2925 if (WARN_ON(old_links == new_links || !link_sta)) 2926 return -EINVAL; 2927 2928 rcu_read_lock(); 2929 if (link_sta_info_hash_lookup(sdata->local, link_sta->addr)) { 2930 rcu_read_unlock(); 2931 return -EALREADY; 2932 } 2933 /* we only modify under the mutex so this is fine */ 2934 rcu_read_unlock(); 2935 2936 sta->sta.valid_links = new_links; 2937 2938 if (!test_sta_flag(sta, WLAN_STA_INSERTED)) 2939 goto hash; 2940 2941 ieee80211_recalc_min_chandef(sdata, link_id); 2942 2943 /* Ensure the values are updated for the driver, 2944 * redone by sta_remove_link on failure. 2945 */ 2946 ieee80211_sta_recalc_aggregates(&sta->sta); 2947 2948 ret = drv_change_sta_links(sdata->local, sdata, &sta->sta, 2949 old_links, new_links); 2950 if (ret) { 2951 sta->sta.valid_links = old_links; 2952 sta_remove_link(sta, link_id, false); 2953 return ret; 2954 } 2955 2956hash: 2957 ret = link_sta_info_hash_add(sdata->local, link_sta); 2958 WARN_ON(ret); 2959 return 0; 2960} 2961 2962void ieee80211_sta_remove_link(struct sta_info *sta, unsigned int link_id) 2963{ 2964 struct ieee80211_sub_if_data *sdata = sta->sdata; 2965 u16 old_links = sta->sta.valid_links; 2966 2967 lockdep_assert_held(&sdata->local->sta_mtx); 2968 2969 sta->sta.valid_links &= ~BIT(link_id); 2970 2971 if (test_sta_flag(sta, WLAN_STA_INSERTED)) 2972 drv_change_sta_links(sdata->local, sdata, &sta->sta, 2973 old_links, sta->sta.valid_links); 2974 2975 sta_remove_link(sta, link_id, true); 2976} 2977 2978void ieee80211_sta_set_max_amsdu_subframes(struct sta_info *sta, 2979 const u8 *ext_capab, 2980 unsigned int ext_capab_len) 2981{ 2982 u8 val; 2983 2984 sta->sta.max_amsdu_subframes = 0; 2985 2986 if (ext_capab_len < 8) 2987 return; 2988 2989 /* The sender might not have sent the last bit, consider it to be 0 */ 2990 val = u8_get_bits(ext_capab[7], WLAN_EXT_CAPA8_MAX_MSDU_IN_AMSDU_LSB); 2991 2992 /* we did get all the bits, take the MSB as well */ 2993 if (ext_capab_len >= 9) 2994 val |= u8_get_bits(ext_capab[8], 2995 WLAN_EXT_CAPA9_MAX_MSDU_IN_AMSDU_MSB) << 1; 2996 2997 if (val) 2998 sta->sta.max_amsdu_subframes = 4 << (4 - val); 2999} 3000 3001#ifdef CONFIG_LOCKDEP 3002bool lockdep_sta_mutex_held(struct ieee80211_sta *pubsta) 3003{ 3004 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 3005 3006 return lockdep_is_held(&sta->local->sta_mtx); 3007} 3008EXPORT_SYMBOL(lockdep_sta_mutex_held); 3009#endif 3010