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) 2018-2021 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 67 struct sta_link_alloc { 68 struct link_sta_info info; 69 struct ieee80211_link_sta sta; 70 struct rcu_head rcu_head; 71 }; 72 73 static 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 82 static 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 */ 92 static 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 99 static 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 } 107 108 static 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 } 116 117 static 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 if (sta->sta.txq[0]) { 144 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) { 145 struct txq_info *txqi; 146 147 if (!sta->sta.txq[i]) 148 continue; 149 150 txqi = to_txq_info(sta->sta.txq[i]); 151 152 ieee80211_txq_purge(local, txqi); 153 } 154 } 155 156 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 157 local->total_ps_buffered -= skb_queue_len(&sta->ps_tx_buf[ac]); 158 ieee80211_purge_tx_queue(&local->hw, &sta->ps_tx_buf[ac]); 159 ieee80211_purge_tx_queue(&local->hw, &sta->tx_filtered[ac]); 160 } 161 162 if (ieee80211_vif_is_mesh(&sdata->vif)) 163 mesh_sta_cleanup(sta); 164 165 cancel_work_sync(&sta->drv_deliver_wk); 166 167 /* 168 * Destroy aggregation state here. It would be nice to wait for the 169 * driver to finish aggregation stop and then clean up, but for now 170 * drivers have to handle aggregation stop being requested, followed 171 * directly by station destruction. 172 */ 173 for (i = 0; i < IEEE80211_NUM_TIDS; i++) { 174 kfree(sta->ampdu_mlme.tid_start_tx[i]); 175 tid_tx = rcu_dereference_raw(sta->ampdu_mlme.tid_tx[i]); 176 if (!tid_tx) 177 continue; 178 ieee80211_purge_tx_queue(&local->hw, &tid_tx->pending); 179 kfree(tid_tx); 180 } 181 } 182 183 static void cleanup_single_sta(struct sta_info *sta) 184 { 185 struct ieee80211_sub_if_data *sdata = sta->sdata; 186 struct ieee80211_local *local = sdata->local; 187 188 __cleanup_single_sta(sta); 189 sta_info_free(local, sta); 190 } 191 192 struct rhlist_head *sta_info_hash_lookup(struct ieee80211_local *local, 193 const u8 *addr) 194 { 195 return rhltable_lookup(&local->sta_hash, addr, sta_rht_params); 196 } 197 198 /* protected by RCU */ 199 struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata, 200 const u8 *addr) 201 { 202 struct ieee80211_local *local = sdata->local; 203 struct rhlist_head *tmp; 204 struct sta_info *sta; 205 206 rcu_read_lock(); 207 for_each_sta_info(local, addr, sta, tmp) { 208 if (sta->sdata == sdata) { 209 rcu_read_unlock(); 210 /* this is safe as the caller must already hold 211 * another rcu read section or the mutex 212 */ 213 return sta; 214 } 215 } 216 rcu_read_unlock(); 217 return NULL; 218 } 219 220 /* 221 * Get sta info either from the specified interface 222 * or from one of its vlans 223 */ 224 struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata, 225 const u8 *addr) 226 { 227 struct ieee80211_local *local = sdata->local; 228 struct rhlist_head *tmp; 229 struct sta_info *sta; 230 231 rcu_read_lock(); 232 for_each_sta_info(local, addr, sta, tmp) { 233 if (sta->sdata == sdata || 234 (sta->sdata->bss && sta->sdata->bss == sdata->bss)) { 235 rcu_read_unlock(); 236 /* this is safe as the caller must already hold 237 * another rcu read section or the mutex 238 */ 239 return sta; 240 } 241 } 242 rcu_read_unlock(); 243 return NULL; 244 } 245 246 struct rhlist_head *link_sta_info_hash_lookup(struct ieee80211_local *local, 247 const u8 *addr) 248 { 249 return rhltable_lookup(&local->link_sta_hash, addr, 250 link_sta_rht_params); 251 } 252 253 struct link_sta_info * 254 link_sta_info_get_bss(struct ieee80211_sub_if_data *sdata, const u8 *addr) 255 { 256 struct ieee80211_local *local = sdata->local; 257 struct rhlist_head *tmp; 258 struct link_sta_info *link_sta; 259 260 rcu_read_lock(); 261 for_each_link_sta_info(local, addr, link_sta, tmp) { 262 struct sta_info *sta = link_sta->sta; 263 264 if (sta->sdata == sdata || 265 (sta->sdata->bss && sta->sdata->bss == sdata->bss)) { 266 rcu_read_unlock(); 267 /* this is safe as the caller must already hold 268 * another rcu read section or the mutex 269 */ 270 return link_sta; 271 } 272 } 273 rcu_read_unlock(); 274 return NULL; 275 } 276 277 struct ieee80211_sta * 278 ieee80211_find_sta_by_link_addrs(struct ieee80211_hw *hw, 279 const u8 *addr, 280 const u8 *localaddr, 281 unsigned int *link_id) 282 { 283 struct ieee80211_local *local = hw_to_local(hw); 284 struct link_sta_info *link_sta; 285 struct rhlist_head *tmp; 286 287 for_each_link_sta_info(local, addr, link_sta, tmp) { 288 struct sta_info *sta = link_sta->sta; 289 struct ieee80211_link_data *link; 290 u8 _link_id = link_sta->link_id; 291 292 if (!localaddr) { 293 if (link_id) 294 *link_id = _link_id; 295 return &sta->sta; 296 } 297 298 link = rcu_dereference(sta->sdata->link[_link_id]); 299 if (!link) 300 continue; 301 302 if (memcmp(link->conf->addr, localaddr, ETH_ALEN)) 303 continue; 304 305 if (link_id) 306 *link_id = _link_id; 307 return &sta->sta; 308 } 309 310 return NULL; 311 } 312 EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_link_addrs); 313 314 struct sta_info *sta_info_get_by_addrs(struct ieee80211_local *local, 315 const u8 *sta_addr, const u8 *vif_addr) 316 { 317 struct rhlist_head *tmp; 318 struct sta_info *sta; 319 320 for_each_sta_info(local, sta_addr, sta, tmp) { 321 if (ether_addr_equal(vif_addr, sta->sdata->vif.addr)) 322 return sta; 323 } 324 325 return NULL; 326 } 327 328 struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata, 329 int idx) 330 { 331 struct ieee80211_local *local = sdata->local; 332 struct sta_info *sta; 333 int i = 0; 334 335 list_for_each_entry_rcu(sta, &local->sta_list, list, 336 lockdep_is_held(&local->sta_mtx)) { 337 if (sdata != sta->sdata) 338 continue; 339 if (i < idx) { 340 ++i; 341 continue; 342 } 343 return sta; 344 } 345 346 return NULL; 347 } 348 349 static void sta_info_free_link(struct link_sta_info *link_sta) 350 { 351 free_percpu(link_sta->pcpu_rx_stats); 352 } 353 354 static void sta_remove_link(struct sta_info *sta, unsigned int link_id, 355 bool unhash) 356 { 357 struct sta_link_alloc *alloc = NULL; 358 struct link_sta_info *link_sta; 359 360 link_sta = rcu_dereference_protected(sta->link[link_id], 361 lockdep_is_held(&sta->local->sta_mtx)); 362 363 if (WARN_ON(!link_sta)) 364 return; 365 366 if (unhash) 367 link_sta_info_hash_del(sta->local, link_sta); 368 369 if (link_sta != &sta->deflink) 370 alloc = container_of(link_sta, typeof(*alloc), info); 371 372 sta->sta.valid_links &= ~BIT(link_id); 373 RCU_INIT_POINTER(sta->link[link_id], NULL); 374 RCU_INIT_POINTER(sta->sta.link[link_id], NULL); 375 if (alloc) { 376 sta_info_free_link(&alloc->info); 377 kfree_rcu(alloc, rcu_head); 378 } 379 380 ieee80211_sta_recalc_aggregates(&sta->sta); 381 } 382 383 /** 384 * sta_info_free - free STA 385 * 386 * @local: pointer to the global information 387 * @sta: STA info to free 388 * 389 * This function must undo everything done by sta_info_alloc() 390 * that may happen before sta_info_insert(). It may only be 391 * called when sta_info_insert() has not been attempted (and 392 * if that fails, the station is freed anyway.) 393 */ 394 void sta_info_free(struct ieee80211_local *local, struct sta_info *sta) 395 { 396 int i; 397 398 for (i = 0; i < ARRAY_SIZE(sta->link); i++) { 399 if (!(sta->sta.valid_links & BIT(i))) 400 continue; 401 402 sta_remove_link(sta, i, false); 403 } 404 405 /* 406 * If we had used sta_info_pre_move_state() then we might not 407 * have gone through the state transitions down again, so do 408 * it here now (and warn if it's inserted). 409 * 410 * This will clear state such as fast TX/RX that may have been 411 * allocated during state transitions. 412 */ 413 while (sta->sta_state > IEEE80211_STA_NONE) { 414 int ret; 415 416 WARN_ON_ONCE(test_sta_flag(sta, WLAN_STA_INSERTED)); 417 418 ret = sta_info_move_state(sta, sta->sta_state - 1); 419 if (WARN_ONCE(ret, "sta_info_move_state() returned %d\n", ret)) 420 break; 421 } 422 423 if (sta->rate_ctrl) 424 rate_control_free_sta(sta); 425 426 sta_dbg(sta->sdata, "Destroyed STA %pM\n", sta->sta.addr); 427 428 if (sta->sta.txq[0]) 429 kfree(to_txq_info(sta->sta.txq[0])); 430 kfree(rcu_dereference_raw(sta->sta.rates)); 431 #ifdef CONFIG_MAC80211_MESH 432 kfree(sta->mesh); 433 #endif 434 435 sta_info_free_link(&sta->deflink); 436 kfree(sta); 437 } 438 439 /* Caller must hold local->sta_mtx */ 440 static int sta_info_hash_add(struct ieee80211_local *local, 441 struct sta_info *sta) 442 { 443 return rhltable_insert(&local->sta_hash, &sta->hash_node, 444 sta_rht_params); 445 } 446 447 static void sta_deliver_ps_frames(struct work_struct *wk) 448 { 449 struct sta_info *sta; 450 451 sta = container_of(wk, struct sta_info, drv_deliver_wk); 452 453 if (sta->dead) 454 return; 455 456 local_bh_disable(); 457 if (!test_sta_flag(sta, WLAN_STA_PS_STA)) 458 ieee80211_sta_ps_deliver_wakeup(sta); 459 else if (test_and_clear_sta_flag(sta, WLAN_STA_PSPOLL)) 460 ieee80211_sta_ps_deliver_poll_response(sta); 461 else if (test_and_clear_sta_flag(sta, WLAN_STA_UAPSD)) 462 ieee80211_sta_ps_deliver_uapsd(sta); 463 local_bh_enable(); 464 } 465 466 static int sta_prepare_rate_control(struct ieee80211_local *local, 467 struct sta_info *sta, gfp_t gfp) 468 { 469 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) 470 return 0; 471 472 sta->rate_ctrl = local->rate_ctrl; 473 sta->rate_ctrl_priv = rate_control_alloc_sta(sta->rate_ctrl, 474 sta, gfp); 475 if (!sta->rate_ctrl_priv) 476 return -ENOMEM; 477 478 return 0; 479 } 480 481 static int sta_info_alloc_link(struct ieee80211_local *local, 482 struct link_sta_info *link_info, 483 gfp_t gfp) 484 { 485 struct ieee80211_hw *hw = &local->hw; 486 int i; 487 488 if (ieee80211_hw_check(hw, USES_RSS)) { 489 link_info->pcpu_rx_stats = 490 alloc_percpu_gfp(struct ieee80211_sta_rx_stats, gfp); 491 if (!link_info->pcpu_rx_stats) 492 return -ENOMEM; 493 } 494 495 link_info->rx_stats.last_rx = jiffies; 496 u64_stats_init(&link_info->rx_stats.syncp); 497 498 ewma_signal_init(&link_info->rx_stats_avg.signal); 499 ewma_avg_signal_init(&link_info->status_stats.avg_ack_signal); 500 for (i = 0; i < ARRAY_SIZE(link_info->rx_stats_avg.chain_signal); i++) 501 ewma_signal_init(&link_info->rx_stats_avg.chain_signal[i]); 502 503 return 0; 504 } 505 506 static void sta_info_add_link(struct sta_info *sta, 507 unsigned int link_id, 508 struct link_sta_info *link_info, 509 struct ieee80211_link_sta *link_sta) 510 { 511 link_info->sta = sta; 512 link_info->link_id = link_id; 513 link_info->pub = link_sta; 514 link_sta->link_id = link_id; 515 rcu_assign_pointer(sta->link[link_id], link_info); 516 rcu_assign_pointer(sta->sta.link[link_id], link_sta); 517 518 link_sta->smps_mode = IEEE80211_SMPS_OFF; 519 link_sta->agg.max_rc_amsdu_len = IEEE80211_MAX_MPDU_LEN_HT_BA; 520 } 521 522 static struct sta_info * 523 __sta_info_alloc(struct ieee80211_sub_if_data *sdata, 524 const u8 *addr, int link_id, const u8 *link_addr, 525 gfp_t gfp) 526 { 527 struct ieee80211_local *local = sdata->local; 528 struct ieee80211_hw *hw = &local->hw; 529 struct sta_info *sta; 530 int i; 531 532 sta = kzalloc(sizeof(*sta) + hw->sta_data_size, gfp); 533 if (!sta) 534 return NULL; 535 536 sta->local = local; 537 sta->sdata = sdata; 538 539 if (sta_info_alloc_link(local, &sta->deflink, gfp)) 540 goto free; 541 542 if (link_id >= 0) { 543 sta_info_add_link(sta, link_id, &sta->deflink, 544 &sta->sta.deflink); 545 sta->sta.valid_links = BIT(link_id); 546 } else { 547 sta_info_add_link(sta, 0, &sta->deflink, &sta->sta.deflink); 548 } 549 550 sta->sta.cur = &sta->sta.deflink.agg; 551 552 spin_lock_init(&sta->lock); 553 spin_lock_init(&sta->ps_lock); 554 INIT_WORK(&sta->drv_deliver_wk, sta_deliver_ps_frames); 555 INIT_WORK(&sta->ampdu_mlme.work, ieee80211_ba_session_work); 556 mutex_init(&sta->ampdu_mlme.mtx); 557 #ifdef CONFIG_MAC80211_MESH 558 if (ieee80211_vif_is_mesh(&sdata->vif)) { 559 sta->mesh = kzalloc(sizeof(*sta->mesh), gfp); 560 if (!sta->mesh) 561 goto free; 562 sta->mesh->plink_sta = sta; 563 spin_lock_init(&sta->mesh->plink_lock); 564 if (!sdata->u.mesh.user_mpm) 565 timer_setup(&sta->mesh->plink_timer, mesh_plink_timer, 566 0); 567 sta->mesh->nonpeer_pm = NL80211_MESH_POWER_ACTIVE; 568 } 569 #endif 570 571 memcpy(sta->addr, addr, ETH_ALEN); 572 memcpy(sta->sta.addr, addr, ETH_ALEN); 573 memcpy(sta->deflink.addr, link_addr, ETH_ALEN); 574 memcpy(sta->sta.deflink.addr, link_addr, ETH_ALEN); 575 sta->sta.max_rx_aggregation_subframes = 576 local->hw.max_rx_aggregation_subframes; 577 578 /* TODO link specific alloc and assignments for MLO Link STA */ 579 580 /* Extended Key ID needs to install keys for keyid 0 and 1 Rx-only. 581 * The Tx path starts to use a key as soon as the key slot ptk_idx 582 * references to is not NULL. To not use the initial Rx-only key 583 * prematurely for Tx initialize ptk_idx to an impossible PTK keyid 584 * which always will refer to a NULL key. 585 */ 586 BUILD_BUG_ON(ARRAY_SIZE(sta->ptk) <= INVALID_PTK_KEYIDX); 587 sta->ptk_idx = INVALID_PTK_KEYIDX; 588 589 590 ieee80211_init_frag_cache(&sta->frags); 591 592 sta->sta_state = IEEE80211_STA_NONE; 593 594 /* Mark TID as unreserved */ 595 sta->reserved_tid = IEEE80211_TID_UNRESERVED; 596 597 sta->last_connected = ktime_get_seconds(); 598 599 if (local->ops->wake_tx_queue) { 600 void *txq_data; 601 int size = sizeof(struct txq_info) + 602 ALIGN(hw->txq_data_size, sizeof(void *)); 603 604 txq_data = kcalloc(ARRAY_SIZE(sta->sta.txq), size, gfp); 605 if (!txq_data) 606 goto free; 607 608 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) { 609 struct txq_info *txq = txq_data + i * size; 610 611 /* might not do anything for the bufferable MMPDU TXQ */ 612 ieee80211_txq_init(sdata, sta, txq, i); 613 } 614 } 615 616 if (sta_prepare_rate_control(local, sta, gfp)) 617 goto free_txq; 618 619 sta->airtime_weight = IEEE80211_DEFAULT_AIRTIME_WEIGHT; 620 621 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 622 skb_queue_head_init(&sta->ps_tx_buf[i]); 623 skb_queue_head_init(&sta->tx_filtered[i]); 624 sta->airtime[i].deficit = sta->airtime_weight; 625 atomic_set(&sta->airtime[i].aql_tx_pending, 0); 626 sta->airtime[i].aql_limit_low = local->aql_txq_limit_low[i]; 627 sta->airtime[i].aql_limit_high = local->aql_txq_limit_high[i]; 628 } 629 630 for (i = 0; i < IEEE80211_NUM_TIDS; i++) 631 sta->last_seq_ctrl[i] = cpu_to_le16(USHRT_MAX); 632 633 for (i = 0; i < NUM_NL80211_BANDS; i++) { 634 u32 mandatory = 0; 635 int r; 636 637 if (!hw->wiphy->bands[i]) 638 continue; 639 640 switch (i) { 641 case NL80211_BAND_2GHZ: 642 case NL80211_BAND_LC: 643 /* 644 * We use both here, even if we cannot really know for 645 * sure the station will support both, but the only use 646 * for this is when we don't know anything yet and send 647 * management frames, and then we'll pick the lowest 648 * possible rate anyway. 649 * If we don't include _G here, we cannot find a rate 650 * in P2P, and thus trigger the WARN_ONCE() in rate.c 651 */ 652 mandatory = IEEE80211_RATE_MANDATORY_B | 653 IEEE80211_RATE_MANDATORY_G; 654 break; 655 case NL80211_BAND_5GHZ: 656 mandatory = IEEE80211_RATE_MANDATORY_A; 657 break; 658 case NL80211_BAND_60GHZ: 659 WARN_ON(1); 660 mandatory = 0; 661 break; 662 } 663 664 for (r = 0; r < hw->wiphy->bands[i]->n_bitrates; r++) { 665 struct ieee80211_rate *rate; 666 667 rate = &hw->wiphy->bands[i]->bitrates[r]; 668 669 if (!(rate->flags & mandatory)) 670 continue; 671 sta->sta.deflink.supp_rates[i] |= BIT(r); 672 } 673 } 674 675 sta->cparams.ce_threshold = CODEL_DISABLED_THRESHOLD; 676 sta->cparams.target = MS2TIME(20); 677 sta->cparams.interval = MS2TIME(100); 678 sta->cparams.ecn = true; 679 sta->cparams.ce_threshold_selector = 0; 680 sta->cparams.ce_threshold_mask = 0; 681 682 sta_dbg(sdata, "Allocated STA %pM\n", sta->sta.addr); 683 684 return sta; 685 686 free_txq: 687 if (sta->sta.txq[0]) 688 kfree(to_txq_info(sta->sta.txq[0])); 689 free: 690 sta_info_free_link(&sta->deflink); 691 #ifdef CONFIG_MAC80211_MESH 692 kfree(sta->mesh); 693 #endif 694 kfree(sta); 695 return NULL; 696 } 697 698 struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata, 699 const u8 *addr, gfp_t gfp) 700 { 701 return __sta_info_alloc(sdata, addr, -1, addr, gfp); 702 } 703 704 struct sta_info *sta_info_alloc_with_link(struct ieee80211_sub_if_data *sdata, 705 const u8 *mld_addr, 706 unsigned int link_id, 707 const u8 *link_addr, 708 gfp_t gfp) 709 { 710 return __sta_info_alloc(sdata, mld_addr, link_id, link_addr, gfp); 711 } 712 713 static int sta_info_insert_check(struct sta_info *sta) 714 { 715 struct ieee80211_sub_if_data *sdata = sta->sdata; 716 717 /* 718 * Can't be a WARN_ON because it can be triggered through a race: 719 * something inserts a STA (on one CPU) without holding the RTNL 720 * and another CPU turns off the net device. 721 */ 722 if (unlikely(!ieee80211_sdata_running(sdata))) 723 return -ENETDOWN; 724 725 if (WARN_ON(ether_addr_equal(sta->sta.addr, sdata->vif.addr) || 726 !is_valid_ether_addr(sta->sta.addr))) 727 return -EINVAL; 728 729 /* The RCU read lock is required by rhashtable due to 730 * asynchronous resize/rehash. We also require the mutex 731 * for correctness. 732 */ 733 rcu_read_lock(); 734 lockdep_assert_held(&sdata->local->sta_mtx); 735 if (ieee80211_hw_check(&sdata->local->hw, NEEDS_UNIQUE_STA_ADDR) && 736 ieee80211_find_sta_by_ifaddr(&sdata->local->hw, sta->addr, NULL)) { 737 rcu_read_unlock(); 738 return -ENOTUNIQ; 739 } 740 rcu_read_unlock(); 741 742 return 0; 743 } 744 745 static int sta_info_insert_drv_state(struct ieee80211_local *local, 746 struct ieee80211_sub_if_data *sdata, 747 struct sta_info *sta) 748 { 749 enum ieee80211_sta_state state; 750 int err = 0; 751 752 for (state = IEEE80211_STA_NOTEXIST; state < sta->sta_state; state++) { 753 err = drv_sta_state(local, sdata, sta, state, state + 1); 754 if (err) 755 break; 756 } 757 758 if (!err) { 759 /* 760 * Drivers using legacy sta_add/sta_remove callbacks only 761 * get uploaded set to true after sta_add is called. 762 */ 763 if (!local->ops->sta_add) 764 sta->uploaded = true; 765 return 0; 766 } 767 768 if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { 769 sdata_info(sdata, 770 "failed to move IBSS STA %pM to state %d (%d) - keeping it anyway\n", 771 sta->sta.addr, state + 1, err); 772 err = 0; 773 } 774 775 /* unwind on error */ 776 for (; state > IEEE80211_STA_NOTEXIST; state--) 777 WARN_ON(drv_sta_state(local, sdata, sta, state, state - 1)); 778 779 return err; 780 } 781 782 static void 783 ieee80211_recalc_p2p_go_ps_allowed(struct ieee80211_sub_if_data *sdata) 784 { 785 struct ieee80211_local *local = sdata->local; 786 bool allow_p2p_go_ps = sdata->vif.p2p; 787 struct sta_info *sta; 788 789 rcu_read_lock(); 790 list_for_each_entry_rcu(sta, &local->sta_list, list) { 791 if (sdata != sta->sdata || 792 !test_sta_flag(sta, WLAN_STA_ASSOC)) 793 continue; 794 if (!sta->sta.support_p2p_ps) { 795 allow_p2p_go_ps = false; 796 break; 797 } 798 } 799 rcu_read_unlock(); 800 801 if (allow_p2p_go_ps != sdata->vif.bss_conf.allow_p2p_go_ps) { 802 sdata->vif.bss_conf.allow_p2p_go_ps = allow_p2p_go_ps; 803 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 804 BSS_CHANGED_P2P_PS); 805 } 806 } 807 808 /* 809 * should be called with sta_mtx locked 810 * this function replaces the mutex lock 811 * with a RCU lock 812 */ 813 static int sta_info_insert_finish(struct sta_info *sta) __acquires(RCU) 814 { 815 struct ieee80211_local *local = sta->local; 816 struct ieee80211_sub_if_data *sdata = sta->sdata; 817 struct station_info *sinfo = NULL; 818 int err = 0; 819 820 lockdep_assert_held(&local->sta_mtx); 821 822 /* check if STA exists already */ 823 if (sta_info_get_bss(sdata, sta->sta.addr)) { 824 err = -EEXIST; 825 goto out_cleanup; 826 } 827 828 sinfo = kzalloc(sizeof(struct station_info), GFP_KERNEL); 829 if (!sinfo) { 830 err = -ENOMEM; 831 goto out_cleanup; 832 } 833 834 local->num_sta++; 835 local->sta_generation++; 836 smp_mb(); 837 838 /* simplify things and don't accept BA sessions yet */ 839 set_sta_flag(sta, WLAN_STA_BLOCK_BA); 840 841 /* make the station visible */ 842 err = sta_info_hash_add(local, sta); 843 if (err) 844 goto out_drop_sta; 845 846 if (sta->sta.valid_links) { 847 err = link_sta_info_hash_add(local, &sta->deflink); 848 if (err) { 849 sta_info_hash_del(local, sta); 850 goto out_drop_sta; 851 } 852 } 853 854 list_add_tail_rcu(&sta->list, &local->sta_list); 855 856 /* update channel context before notifying the driver about state 857 * change, this enables driver using the updated channel context right away. 858 */ 859 if (sta->sta_state >= IEEE80211_STA_ASSOC) { 860 ieee80211_recalc_min_chandef(sta->sdata, -1); 861 if (!sta->sta.support_p2p_ps) 862 ieee80211_recalc_p2p_go_ps_allowed(sta->sdata); 863 } 864 865 /* notify driver */ 866 err = sta_info_insert_drv_state(local, sdata, sta); 867 if (err) 868 goto out_remove; 869 870 set_sta_flag(sta, WLAN_STA_INSERTED); 871 872 /* accept BA sessions now */ 873 clear_sta_flag(sta, WLAN_STA_BLOCK_BA); 874 875 ieee80211_sta_debugfs_add(sta); 876 rate_control_add_sta_debugfs(sta); 877 878 sinfo->generation = local->sta_generation; 879 cfg80211_new_sta(sdata->dev, sta->sta.addr, sinfo, GFP_KERNEL); 880 kfree(sinfo); 881 882 sta_dbg(sdata, "Inserted STA %pM\n", sta->sta.addr); 883 884 /* move reference to rcu-protected */ 885 rcu_read_lock(); 886 mutex_unlock(&local->sta_mtx); 887 888 if (ieee80211_vif_is_mesh(&sdata->vif)) 889 mesh_accept_plinks_update(sdata); 890 891 return 0; 892 out_remove: 893 if (sta->sta.valid_links) 894 link_sta_info_hash_del(local, &sta->deflink); 895 sta_info_hash_del(local, sta); 896 list_del_rcu(&sta->list); 897 out_drop_sta: 898 local->num_sta--; 899 synchronize_net(); 900 out_cleanup: 901 cleanup_single_sta(sta); 902 mutex_unlock(&local->sta_mtx); 903 kfree(sinfo); 904 rcu_read_lock(); 905 return err; 906 } 907 908 int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU) 909 { 910 struct ieee80211_local *local = sta->local; 911 int err; 912 913 might_sleep(); 914 915 mutex_lock(&local->sta_mtx); 916 917 err = sta_info_insert_check(sta); 918 if (err) { 919 sta_info_free(local, sta); 920 mutex_unlock(&local->sta_mtx); 921 rcu_read_lock(); 922 return err; 923 } 924 925 return sta_info_insert_finish(sta); 926 } 927 928 int sta_info_insert(struct sta_info *sta) 929 { 930 int err = sta_info_insert_rcu(sta); 931 932 rcu_read_unlock(); 933 934 return err; 935 } 936 937 static inline void __bss_tim_set(u8 *tim, u16 id) 938 { 939 /* 940 * This format has been mandated by the IEEE specifications, 941 * so this line may not be changed to use the __set_bit() format. 942 */ 943 tim[id / 8] |= (1 << (id % 8)); 944 } 945 946 static inline void __bss_tim_clear(u8 *tim, u16 id) 947 { 948 /* 949 * This format has been mandated by the IEEE specifications, 950 * so this line may not be changed to use the __clear_bit() format. 951 */ 952 tim[id / 8] &= ~(1 << (id % 8)); 953 } 954 955 static inline bool __bss_tim_get(u8 *tim, u16 id) 956 { 957 /* 958 * This format has been mandated by the IEEE specifications, 959 * so this line may not be changed to use the test_bit() format. 960 */ 961 return tim[id / 8] & (1 << (id % 8)); 962 } 963 964 static unsigned long ieee80211_tids_for_ac(int ac) 965 { 966 /* If we ever support TIDs > 7, this obviously needs to be adjusted */ 967 switch (ac) { 968 case IEEE80211_AC_VO: 969 return BIT(6) | BIT(7); 970 case IEEE80211_AC_VI: 971 return BIT(4) | BIT(5); 972 case IEEE80211_AC_BE: 973 return BIT(0) | BIT(3); 974 case IEEE80211_AC_BK: 975 return BIT(1) | BIT(2); 976 default: 977 WARN_ON(1); 978 return 0; 979 } 980 } 981 982 static void __sta_info_recalc_tim(struct sta_info *sta, bool ignore_pending) 983 { 984 struct ieee80211_local *local = sta->local; 985 struct ps_data *ps; 986 bool indicate_tim = false; 987 u8 ignore_for_tim = sta->sta.uapsd_queues; 988 int ac; 989 u16 id = sta->sta.aid; 990 991 if (sta->sdata->vif.type == NL80211_IFTYPE_AP || 992 sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 993 if (WARN_ON_ONCE(!sta->sdata->bss)) 994 return; 995 996 ps = &sta->sdata->bss->ps; 997 #ifdef CONFIG_MAC80211_MESH 998 } else if (ieee80211_vif_is_mesh(&sta->sdata->vif)) { 999 ps = &sta->sdata->u.mesh.ps; 1000 #endif 1001 } else { 1002 return; 1003 } 1004 1005 /* No need to do anything if the driver does all */ 1006 if (ieee80211_hw_check(&local->hw, AP_LINK_PS) && !local->ops->set_tim) 1007 return; 1008 1009 if (sta->dead) 1010 goto done; 1011 1012 /* 1013 * If all ACs are delivery-enabled then we should build 1014 * the TIM bit for all ACs anyway; if only some are then 1015 * we ignore those and build the TIM bit using only the 1016 * non-enabled ones. 1017 */ 1018 if (ignore_for_tim == BIT(IEEE80211_NUM_ACS) - 1) 1019 ignore_for_tim = 0; 1020 1021 if (ignore_pending) 1022 ignore_for_tim = BIT(IEEE80211_NUM_ACS) - 1; 1023 1024 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1025 unsigned long tids; 1026 1027 if (ignore_for_tim & ieee80211_ac_to_qos_mask[ac]) 1028 continue; 1029 1030 indicate_tim |= !skb_queue_empty(&sta->tx_filtered[ac]) || 1031 !skb_queue_empty(&sta->ps_tx_buf[ac]); 1032 if (indicate_tim) 1033 break; 1034 1035 tids = ieee80211_tids_for_ac(ac); 1036 1037 indicate_tim |= 1038 sta->driver_buffered_tids & tids; 1039 indicate_tim |= 1040 sta->txq_buffered_tids & tids; 1041 } 1042 1043 done: 1044 spin_lock_bh(&local->tim_lock); 1045 1046 if (indicate_tim == __bss_tim_get(ps->tim, id)) 1047 goto out_unlock; 1048 1049 if (indicate_tim) 1050 __bss_tim_set(ps->tim, id); 1051 else 1052 __bss_tim_clear(ps->tim, id); 1053 1054 if (local->ops->set_tim && !WARN_ON(sta->dead)) { 1055 local->tim_in_locked_section = true; 1056 drv_set_tim(local, &sta->sta, indicate_tim); 1057 local->tim_in_locked_section = false; 1058 } 1059 1060 out_unlock: 1061 spin_unlock_bh(&local->tim_lock); 1062 } 1063 1064 void sta_info_recalc_tim(struct sta_info *sta) 1065 { 1066 __sta_info_recalc_tim(sta, false); 1067 } 1068 1069 static bool sta_info_buffer_expired(struct sta_info *sta, struct sk_buff *skb) 1070 { 1071 struct ieee80211_tx_info *info; 1072 int timeout; 1073 1074 if (!skb) 1075 return false; 1076 1077 info = IEEE80211_SKB_CB(skb); 1078 1079 /* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */ 1080 timeout = (sta->listen_interval * 1081 sta->sdata->vif.bss_conf.beacon_int * 1082 32 / 15625) * HZ; 1083 if (timeout < STA_TX_BUFFER_EXPIRE) 1084 timeout = STA_TX_BUFFER_EXPIRE; 1085 return time_after(jiffies, info->control.jiffies + timeout); 1086 } 1087 1088 1089 static bool sta_info_cleanup_expire_buffered_ac(struct ieee80211_local *local, 1090 struct sta_info *sta, int ac) 1091 { 1092 unsigned long flags; 1093 struct sk_buff *skb; 1094 1095 /* 1096 * First check for frames that should expire on the filtered 1097 * queue. Frames here were rejected by the driver and are on 1098 * a separate queue to avoid reordering with normal PS-buffered 1099 * frames. They also aren't accounted for right now in the 1100 * total_ps_buffered counter. 1101 */ 1102 for (;;) { 1103 spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags); 1104 skb = skb_peek(&sta->tx_filtered[ac]); 1105 if (sta_info_buffer_expired(sta, skb)) 1106 skb = __skb_dequeue(&sta->tx_filtered[ac]); 1107 else 1108 skb = NULL; 1109 spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags); 1110 1111 /* 1112 * Frames are queued in order, so if this one 1113 * hasn't expired yet we can stop testing. If 1114 * we actually reached the end of the queue we 1115 * also need to stop, of course. 1116 */ 1117 if (!skb) 1118 break; 1119 ieee80211_free_txskb(&local->hw, skb); 1120 } 1121 1122 /* 1123 * Now also check the normal PS-buffered queue, this will 1124 * only find something if the filtered queue was emptied 1125 * since the filtered frames are all before the normal PS 1126 * buffered frames. 1127 */ 1128 for (;;) { 1129 spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags); 1130 skb = skb_peek(&sta->ps_tx_buf[ac]); 1131 if (sta_info_buffer_expired(sta, skb)) 1132 skb = __skb_dequeue(&sta->ps_tx_buf[ac]); 1133 else 1134 skb = NULL; 1135 spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags); 1136 1137 /* 1138 * frames are queued in order, so if this one 1139 * hasn't expired yet (or we reached the end of 1140 * the queue) we can stop testing 1141 */ 1142 if (!skb) 1143 break; 1144 1145 local->total_ps_buffered--; 1146 ps_dbg(sta->sdata, "Buffered frame expired (STA %pM)\n", 1147 sta->sta.addr); 1148 ieee80211_free_txskb(&local->hw, skb); 1149 } 1150 1151 /* 1152 * Finally, recalculate the TIM bit for this station -- it might 1153 * now be clear because the station was too slow to retrieve its 1154 * frames. 1155 */ 1156 sta_info_recalc_tim(sta); 1157 1158 /* 1159 * Return whether there are any frames still buffered, this is 1160 * used to check whether the cleanup timer still needs to run, 1161 * if there are no frames we don't need to rearm the timer. 1162 */ 1163 return !(skb_queue_empty(&sta->ps_tx_buf[ac]) && 1164 skb_queue_empty(&sta->tx_filtered[ac])); 1165 } 1166 1167 static bool sta_info_cleanup_expire_buffered(struct ieee80211_local *local, 1168 struct sta_info *sta) 1169 { 1170 bool have_buffered = false; 1171 int ac; 1172 1173 /* This is only necessary for stations on BSS/MBSS interfaces */ 1174 if (!sta->sdata->bss && 1175 !ieee80211_vif_is_mesh(&sta->sdata->vif)) 1176 return false; 1177 1178 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 1179 have_buffered |= 1180 sta_info_cleanup_expire_buffered_ac(local, sta, ac); 1181 1182 return have_buffered; 1183 } 1184 1185 static int __must_check __sta_info_destroy_part1(struct sta_info *sta) 1186 { 1187 struct ieee80211_local *local; 1188 struct ieee80211_sub_if_data *sdata; 1189 int ret, i; 1190 1191 might_sleep(); 1192 1193 if (!sta) 1194 return -ENOENT; 1195 1196 local = sta->local; 1197 sdata = sta->sdata; 1198 1199 lockdep_assert_held(&local->sta_mtx); 1200 1201 /* 1202 * Before removing the station from the driver and 1203 * rate control, it might still start new aggregation 1204 * sessions -- block that to make sure the tear-down 1205 * will be sufficient. 1206 */ 1207 set_sta_flag(sta, WLAN_STA_BLOCK_BA); 1208 ieee80211_sta_tear_down_BA_sessions(sta, AGG_STOP_DESTROY_STA); 1209 1210 /* 1211 * Before removing the station from the driver there might be pending 1212 * rx frames on RSS queues sent prior to the disassociation - wait for 1213 * all such frames to be processed. 1214 */ 1215 drv_sync_rx_queues(local, sta); 1216 1217 for (i = 0; i < ARRAY_SIZE(sta->link); i++) { 1218 struct link_sta_info *link_sta; 1219 1220 if (!(sta->sta.valid_links & BIT(i))) 1221 continue; 1222 1223 link_sta = rcu_dereference_protected(sta->link[i], 1224 lockdep_is_held(&local->sta_mtx)); 1225 1226 link_sta_info_hash_del(local, link_sta); 1227 } 1228 1229 ret = sta_info_hash_del(local, sta); 1230 if (WARN_ON(ret)) 1231 return ret; 1232 1233 /* 1234 * for TDLS peers, make sure to return to the base channel before 1235 * removal. 1236 */ 1237 if (test_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL)) { 1238 drv_tdls_cancel_channel_switch(local, sdata, &sta->sta); 1239 clear_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL); 1240 } 1241 1242 list_del_rcu(&sta->list); 1243 sta->removed = true; 1244 1245 drv_sta_pre_rcu_remove(local, sta->sdata, sta); 1246 1247 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN && 1248 rcu_access_pointer(sdata->u.vlan.sta) == sta) 1249 RCU_INIT_POINTER(sdata->u.vlan.sta, NULL); 1250 1251 return 0; 1252 } 1253 1254 static void __sta_info_destroy_part2(struct sta_info *sta) 1255 { 1256 struct ieee80211_local *local = sta->local; 1257 struct ieee80211_sub_if_data *sdata = sta->sdata; 1258 struct station_info *sinfo; 1259 int ret; 1260 1261 /* 1262 * NOTE: This assumes at least synchronize_net() was done 1263 * after _part1 and before _part2! 1264 */ 1265 1266 might_sleep(); 1267 lockdep_assert_held(&local->sta_mtx); 1268 1269 if (sta->sta_state == IEEE80211_STA_AUTHORIZED) { 1270 ret = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 1271 WARN_ON_ONCE(ret); 1272 } 1273 1274 /* now keys can no longer be reached */ 1275 ieee80211_free_sta_keys(local, sta); 1276 1277 /* disable TIM bit - last chance to tell driver */ 1278 __sta_info_recalc_tim(sta, true); 1279 1280 sta->dead = true; 1281 1282 local->num_sta--; 1283 local->sta_generation++; 1284 1285 while (sta->sta_state > IEEE80211_STA_NONE) { 1286 ret = sta_info_move_state(sta, sta->sta_state - 1); 1287 if (ret) { 1288 WARN_ON_ONCE(1); 1289 break; 1290 } 1291 } 1292 1293 if (sta->uploaded) { 1294 ret = drv_sta_state(local, sdata, sta, IEEE80211_STA_NONE, 1295 IEEE80211_STA_NOTEXIST); 1296 WARN_ON_ONCE(ret != 0); 1297 } 1298 1299 sta_dbg(sdata, "Removed STA %pM\n", sta->sta.addr); 1300 1301 sinfo = kzalloc(sizeof(*sinfo), GFP_KERNEL); 1302 if (sinfo) 1303 sta_set_sinfo(sta, sinfo, true); 1304 cfg80211_del_sta_sinfo(sdata->dev, sta->sta.addr, sinfo, GFP_KERNEL); 1305 kfree(sinfo); 1306 1307 ieee80211_sta_debugfs_remove(sta); 1308 1309 ieee80211_destroy_frag_cache(&sta->frags); 1310 1311 cleanup_single_sta(sta); 1312 } 1313 1314 int __must_check __sta_info_destroy(struct sta_info *sta) 1315 { 1316 int err = __sta_info_destroy_part1(sta); 1317 1318 if (err) 1319 return err; 1320 1321 synchronize_net(); 1322 1323 __sta_info_destroy_part2(sta); 1324 1325 return 0; 1326 } 1327 1328 int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, const u8 *addr) 1329 { 1330 struct sta_info *sta; 1331 int ret; 1332 1333 mutex_lock(&sdata->local->sta_mtx); 1334 sta = sta_info_get(sdata, addr); 1335 ret = __sta_info_destroy(sta); 1336 mutex_unlock(&sdata->local->sta_mtx); 1337 1338 return ret; 1339 } 1340 1341 int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata, 1342 const u8 *addr) 1343 { 1344 struct sta_info *sta; 1345 int ret; 1346 1347 mutex_lock(&sdata->local->sta_mtx); 1348 sta = sta_info_get_bss(sdata, addr); 1349 ret = __sta_info_destroy(sta); 1350 mutex_unlock(&sdata->local->sta_mtx); 1351 1352 return ret; 1353 } 1354 1355 static void sta_info_cleanup(struct timer_list *t) 1356 { 1357 struct ieee80211_local *local = from_timer(local, t, sta_cleanup); 1358 struct sta_info *sta; 1359 bool timer_needed = false; 1360 1361 rcu_read_lock(); 1362 list_for_each_entry_rcu(sta, &local->sta_list, list) 1363 if (sta_info_cleanup_expire_buffered(local, sta)) 1364 timer_needed = true; 1365 rcu_read_unlock(); 1366 1367 if (local->quiescing) 1368 return; 1369 1370 if (!timer_needed) 1371 return; 1372 1373 mod_timer(&local->sta_cleanup, 1374 round_jiffies(jiffies + STA_INFO_CLEANUP_INTERVAL)); 1375 } 1376 1377 int sta_info_init(struct ieee80211_local *local) 1378 { 1379 int err; 1380 1381 err = rhltable_init(&local->sta_hash, &sta_rht_params); 1382 if (err) 1383 return err; 1384 1385 err = rhltable_init(&local->link_sta_hash, &link_sta_rht_params); 1386 if (err) { 1387 rhltable_destroy(&local->sta_hash); 1388 return err; 1389 } 1390 1391 spin_lock_init(&local->tim_lock); 1392 mutex_init(&local->sta_mtx); 1393 INIT_LIST_HEAD(&local->sta_list); 1394 1395 timer_setup(&local->sta_cleanup, sta_info_cleanup, 0); 1396 return 0; 1397 } 1398 1399 void sta_info_stop(struct ieee80211_local *local) 1400 { 1401 del_timer_sync(&local->sta_cleanup); 1402 rhltable_destroy(&local->sta_hash); 1403 rhltable_destroy(&local->link_sta_hash); 1404 } 1405 1406 1407 int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans) 1408 { 1409 struct ieee80211_local *local = sdata->local; 1410 struct sta_info *sta, *tmp; 1411 LIST_HEAD(free_list); 1412 int ret = 0; 1413 1414 might_sleep(); 1415 1416 WARN_ON(vlans && sdata->vif.type != NL80211_IFTYPE_AP); 1417 WARN_ON(vlans && !sdata->bss); 1418 1419 mutex_lock(&local->sta_mtx); 1420 list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { 1421 if (sdata == sta->sdata || 1422 (vlans && sdata->bss == sta->sdata->bss)) { 1423 if (!WARN_ON(__sta_info_destroy_part1(sta))) 1424 list_add(&sta->free_list, &free_list); 1425 ret++; 1426 } 1427 } 1428 1429 if (!list_empty(&free_list)) { 1430 synchronize_net(); 1431 list_for_each_entry_safe(sta, tmp, &free_list, free_list) 1432 __sta_info_destroy_part2(sta); 1433 } 1434 mutex_unlock(&local->sta_mtx); 1435 1436 return ret; 1437 } 1438 1439 void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, 1440 unsigned long exp_time) 1441 { 1442 struct ieee80211_local *local = sdata->local; 1443 struct sta_info *sta, *tmp; 1444 1445 mutex_lock(&local->sta_mtx); 1446 1447 list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { 1448 unsigned long last_active = ieee80211_sta_last_active(sta); 1449 1450 if (sdata != sta->sdata) 1451 continue; 1452 1453 if (time_is_before_jiffies(last_active + exp_time)) { 1454 sta_dbg(sta->sdata, "expiring inactive STA %pM\n", 1455 sta->sta.addr); 1456 1457 if (ieee80211_vif_is_mesh(&sdata->vif) && 1458 test_sta_flag(sta, WLAN_STA_PS_STA)) 1459 atomic_dec(&sdata->u.mesh.ps.num_sta_ps); 1460 1461 WARN_ON(__sta_info_destroy(sta)); 1462 } 1463 } 1464 1465 mutex_unlock(&local->sta_mtx); 1466 } 1467 1468 struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw, 1469 const u8 *addr, 1470 const u8 *localaddr) 1471 { 1472 struct ieee80211_local *local = hw_to_local(hw); 1473 struct rhlist_head *tmp; 1474 struct sta_info *sta; 1475 1476 /* 1477 * Just return a random station if localaddr is NULL 1478 * ... first in list. 1479 */ 1480 for_each_sta_info(local, addr, sta, tmp) { 1481 if (localaddr && 1482 !ether_addr_equal(sta->sdata->vif.addr, localaddr)) 1483 continue; 1484 if (!sta->uploaded) 1485 return NULL; 1486 return &sta->sta; 1487 } 1488 1489 return NULL; 1490 } 1491 EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_ifaddr); 1492 1493 struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif, 1494 const u8 *addr) 1495 { 1496 struct sta_info *sta; 1497 1498 if (!vif) 1499 return NULL; 1500 1501 sta = sta_info_get_bss(vif_to_sdata(vif), addr); 1502 if (!sta) 1503 return NULL; 1504 1505 if (!sta->uploaded) 1506 return NULL; 1507 1508 return &sta->sta; 1509 } 1510 EXPORT_SYMBOL(ieee80211_find_sta); 1511 1512 /* powersave support code */ 1513 void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta) 1514 { 1515 struct ieee80211_sub_if_data *sdata = sta->sdata; 1516 struct ieee80211_local *local = sdata->local; 1517 struct sk_buff_head pending; 1518 int filtered = 0, buffered = 0, ac, i; 1519 unsigned long flags; 1520 struct ps_data *ps; 1521 1522 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 1523 sdata = container_of(sdata->bss, struct ieee80211_sub_if_data, 1524 u.ap); 1525 1526 if (sdata->vif.type == NL80211_IFTYPE_AP) 1527 ps = &sdata->bss->ps; 1528 else if (ieee80211_vif_is_mesh(&sdata->vif)) 1529 ps = &sdata->u.mesh.ps; 1530 else 1531 return; 1532 1533 clear_sta_flag(sta, WLAN_STA_SP); 1534 1535 BUILD_BUG_ON(BITS_TO_LONGS(IEEE80211_NUM_TIDS) > 1); 1536 sta->driver_buffered_tids = 0; 1537 sta->txq_buffered_tids = 0; 1538 1539 if (!ieee80211_hw_check(&local->hw, AP_LINK_PS)) 1540 drv_sta_notify(local, sdata, STA_NOTIFY_AWAKE, &sta->sta); 1541 1542 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) { 1543 if (!sta->sta.txq[i] || !txq_has_queue(sta->sta.txq[i])) 1544 continue; 1545 1546 schedule_and_wake_txq(local, to_txq_info(sta->sta.txq[i])); 1547 } 1548 1549 skb_queue_head_init(&pending); 1550 1551 /* sync with ieee80211_tx_h_unicast_ps_buf */ 1552 spin_lock(&sta->ps_lock); 1553 /* Send all buffered frames to the station */ 1554 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1555 int count = skb_queue_len(&pending), tmp; 1556 1557 spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags); 1558 skb_queue_splice_tail_init(&sta->tx_filtered[ac], &pending); 1559 spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags); 1560 tmp = skb_queue_len(&pending); 1561 filtered += tmp - count; 1562 count = tmp; 1563 1564 spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags); 1565 skb_queue_splice_tail_init(&sta->ps_tx_buf[ac], &pending); 1566 spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags); 1567 tmp = skb_queue_len(&pending); 1568 buffered += tmp - count; 1569 } 1570 1571 ieee80211_add_pending_skbs(local, &pending); 1572 1573 /* now we're no longer in the deliver code */ 1574 clear_sta_flag(sta, WLAN_STA_PS_DELIVER); 1575 1576 /* The station might have polled and then woken up before we responded, 1577 * so clear these flags now to avoid them sticking around. 1578 */ 1579 clear_sta_flag(sta, WLAN_STA_PSPOLL); 1580 clear_sta_flag(sta, WLAN_STA_UAPSD); 1581 spin_unlock(&sta->ps_lock); 1582 1583 atomic_dec(&ps->num_sta_ps); 1584 1585 local->total_ps_buffered -= buffered; 1586 1587 sta_info_recalc_tim(sta); 1588 1589 ps_dbg(sdata, 1590 "STA %pM aid %d sending %d filtered/%d PS frames since STA woke up\n", 1591 sta->sta.addr, sta->sta.aid, filtered, buffered); 1592 1593 ieee80211_check_fast_xmit(sta); 1594 } 1595 1596 static void ieee80211_send_null_response(struct sta_info *sta, int tid, 1597 enum ieee80211_frame_release_type reason, 1598 bool call_driver, bool more_data) 1599 { 1600 struct ieee80211_sub_if_data *sdata = sta->sdata; 1601 struct ieee80211_local *local = sdata->local; 1602 struct ieee80211_qos_hdr *nullfunc; 1603 struct sk_buff *skb; 1604 int size = sizeof(*nullfunc); 1605 __le16 fc; 1606 bool qos = sta->sta.wme; 1607 struct ieee80211_tx_info *info; 1608 struct ieee80211_chanctx_conf *chanctx_conf; 1609 1610 if (qos) { 1611 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | 1612 IEEE80211_STYPE_QOS_NULLFUNC | 1613 IEEE80211_FCTL_FROMDS); 1614 } else { 1615 size -= 2; 1616 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | 1617 IEEE80211_STYPE_NULLFUNC | 1618 IEEE80211_FCTL_FROMDS); 1619 } 1620 1621 skb = dev_alloc_skb(local->hw.extra_tx_headroom + size); 1622 if (!skb) 1623 return; 1624 1625 skb_reserve(skb, local->hw.extra_tx_headroom); 1626 1627 nullfunc = skb_put(skb, size); 1628 nullfunc->frame_control = fc; 1629 nullfunc->duration_id = 0; 1630 memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN); 1631 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 1632 memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN); 1633 nullfunc->seq_ctrl = 0; 1634 1635 skb->priority = tid; 1636 skb_set_queue_mapping(skb, ieee802_1d_to_ac[tid]); 1637 if (qos) { 1638 nullfunc->qos_ctrl = cpu_to_le16(tid); 1639 1640 if (reason == IEEE80211_FRAME_RELEASE_UAPSD) { 1641 nullfunc->qos_ctrl |= 1642 cpu_to_le16(IEEE80211_QOS_CTL_EOSP); 1643 if (more_data) 1644 nullfunc->frame_control |= 1645 cpu_to_le16(IEEE80211_FCTL_MOREDATA); 1646 } 1647 } 1648 1649 info = IEEE80211_SKB_CB(skb); 1650 1651 /* 1652 * Tell TX path to send this frame even though the 1653 * STA may still remain is PS mode after this frame 1654 * exchange. Also set EOSP to indicate this packet 1655 * ends the poll/service period. 1656 */ 1657 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER | 1658 IEEE80211_TX_STATUS_EOSP | 1659 IEEE80211_TX_CTL_REQ_TX_STATUS; 1660 1661 info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE; 1662 1663 if (call_driver) 1664 drv_allow_buffered_frames(local, sta, BIT(tid), 1, 1665 reason, false); 1666 1667 skb->dev = sdata->dev; 1668 1669 rcu_read_lock(); 1670 chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf); 1671 if (WARN_ON(!chanctx_conf)) { 1672 rcu_read_unlock(); 1673 kfree_skb(skb); 1674 return; 1675 } 1676 1677 info->band = chanctx_conf->def.chan->band; 1678 ieee80211_xmit(sdata, sta, skb); 1679 rcu_read_unlock(); 1680 } 1681 1682 static int find_highest_prio_tid(unsigned long tids) 1683 { 1684 /* lower 3 TIDs aren't ordered perfectly */ 1685 if (tids & 0xF8) 1686 return fls(tids) - 1; 1687 /* TID 0 is BE just like TID 3 */ 1688 if (tids & BIT(0)) 1689 return 0; 1690 return fls(tids) - 1; 1691 } 1692 1693 /* Indicates if the MORE_DATA bit should be set in the last 1694 * frame obtained by ieee80211_sta_ps_get_frames. 1695 * Note that driver_release_tids is relevant only if 1696 * reason = IEEE80211_FRAME_RELEASE_PSPOLL 1697 */ 1698 static bool 1699 ieee80211_sta_ps_more_data(struct sta_info *sta, u8 ignored_acs, 1700 enum ieee80211_frame_release_type reason, 1701 unsigned long driver_release_tids) 1702 { 1703 int ac; 1704 1705 /* If the driver has data on more than one TID then 1706 * certainly there's more data if we release just a 1707 * single frame now (from a single TID). This will 1708 * only happen for PS-Poll. 1709 */ 1710 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL && 1711 hweight16(driver_release_tids) > 1) 1712 return true; 1713 1714 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1715 if (ignored_acs & ieee80211_ac_to_qos_mask[ac]) 1716 continue; 1717 1718 if (!skb_queue_empty(&sta->tx_filtered[ac]) || 1719 !skb_queue_empty(&sta->ps_tx_buf[ac])) 1720 return true; 1721 } 1722 1723 return false; 1724 } 1725 1726 static void 1727 ieee80211_sta_ps_get_frames(struct sta_info *sta, int n_frames, u8 ignored_acs, 1728 enum ieee80211_frame_release_type reason, 1729 struct sk_buff_head *frames, 1730 unsigned long *driver_release_tids) 1731 { 1732 struct ieee80211_sub_if_data *sdata = sta->sdata; 1733 struct ieee80211_local *local = sdata->local; 1734 int ac; 1735 1736 /* Get response frame(s) and more data bit for the last one. */ 1737 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1738 unsigned long tids; 1739 1740 if (ignored_acs & ieee80211_ac_to_qos_mask[ac]) 1741 continue; 1742 1743 tids = ieee80211_tids_for_ac(ac); 1744 1745 /* if we already have frames from software, then we can't also 1746 * release from hardware queues 1747 */ 1748 if (skb_queue_empty(frames)) { 1749 *driver_release_tids |= 1750 sta->driver_buffered_tids & tids; 1751 *driver_release_tids |= sta->txq_buffered_tids & tids; 1752 } 1753 1754 if (!*driver_release_tids) { 1755 struct sk_buff *skb; 1756 1757 while (n_frames > 0) { 1758 skb = skb_dequeue(&sta->tx_filtered[ac]); 1759 if (!skb) { 1760 skb = skb_dequeue( 1761 &sta->ps_tx_buf[ac]); 1762 if (skb) 1763 local->total_ps_buffered--; 1764 } 1765 if (!skb) 1766 break; 1767 n_frames--; 1768 __skb_queue_tail(frames, skb); 1769 } 1770 } 1771 1772 /* If we have more frames buffered on this AC, then abort the 1773 * loop since we can't send more data from other ACs before 1774 * the buffered frames from this. 1775 */ 1776 if (!skb_queue_empty(&sta->tx_filtered[ac]) || 1777 !skb_queue_empty(&sta->ps_tx_buf[ac])) 1778 break; 1779 } 1780 } 1781 1782 static void 1783 ieee80211_sta_ps_deliver_response(struct sta_info *sta, 1784 int n_frames, u8 ignored_acs, 1785 enum ieee80211_frame_release_type reason) 1786 { 1787 struct ieee80211_sub_if_data *sdata = sta->sdata; 1788 struct ieee80211_local *local = sdata->local; 1789 unsigned long driver_release_tids = 0; 1790 struct sk_buff_head frames; 1791 bool more_data; 1792 1793 /* Service or PS-Poll period starts */ 1794 set_sta_flag(sta, WLAN_STA_SP); 1795 1796 __skb_queue_head_init(&frames); 1797 1798 ieee80211_sta_ps_get_frames(sta, n_frames, ignored_acs, reason, 1799 &frames, &driver_release_tids); 1800 1801 more_data = ieee80211_sta_ps_more_data(sta, ignored_acs, reason, driver_release_tids); 1802 1803 if (driver_release_tids && reason == IEEE80211_FRAME_RELEASE_PSPOLL) 1804 driver_release_tids = 1805 BIT(find_highest_prio_tid(driver_release_tids)); 1806 1807 if (skb_queue_empty(&frames) && !driver_release_tids) { 1808 int tid, ac; 1809 1810 /* 1811 * For PS-Poll, this can only happen due to a race condition 1812 * when we set the TIM bit and the station notices it, but 1813 * before it can poll for the frame we expire it. 1814 * 1815 * For uAPSD, this is said in the standard (11.2.1.5 h): 1816 * At each unscheduled SP for a non-AP STA, the AP shall 1817 * attempt to transmit at least one MSDU or MMPDU, but no 1818 * more than the value specified in the Max SP Length field 1819 * in the QoS Capability element from delivery-enabled ACs, 1820 * that are destined for the non-AP STA. 1821 * 1822 * Since we have no other MSDU/MMPDU, transmit a QoS null frame. 1823 */ 1824 1825 /* This will evaluate to 1, 3, 5 or 7. */ 1826 for (ac = IEEE80211_AC_VO; ac < IEEE80211_NUM_ACS; ac++) 1827 if (!(ignored_acs & ieee80211_ac_to_qos_mask[ac])) 1828 break; 1829 tid = 7 - 2 * ac; 1830 1831 ieee80211_send_null_response(sta, tid, reason, true, false); 1832 } else if (!driver_release_tids) { 1833 struct sk_buff_head pending; 1834 struct sk_buff *skb; 1835 int num = 0; 1836 u16 tids = 0; 1837 bool need_null = false; 1838 1839 skb_queue_head_init(&pending); 1840 1841 while ((skb = __skb_dequeue(&frames))) { 1842 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1843 struct ieee80211_hdr *hdr = (void *) skb->data; 1844 u8 *qoshdr = NULL; 1845 1846 num++; 1847 1848 /* 1849 * Tell TX path to send this frame even though the 1850 * STA may still remain is PS mode after this frame 1851 * exchange. 1852 */ 1853 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER; 1854 info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE; 1855 1856 /* 1857 * Use MoreData flag to indicate whether there are 1858 * more buffered frames for this STA 1859 */ 1860 if (more_data || !skb_queue_empty(&frames)) 1861 hdr->frame_control |= 1862 cpu_to_le16(IEEE80211_FCTL_MOREDATA); 1863 else 1864 hdr->frame_control &= 1865 cpu_to_le16(~IEEE80211_FCTL_MOREDATA); 1866 1867 if (ieee80211_is_data_qos(hdr->frame_control) || 1868 ieee80211_is_qos_nullfunc(hdr->frame_control)) 1869 qoshdr = ieee80211_get_qos_ctl(hdr); 1870 1871 tids |= BIT(skb->priority); 1872 1873 __skb_queue_tail(&pending, skb); 1874 1875 /* end service period after last frame or add one */ 1876 if (!skb_queue_empty(&frames)) 1877 continue; 1878 1879 if (reason != IEEE80211_FRAME_RELEASE_UAPSD) { 1880 /* for PS-Poll, there's only one frame */ 1881 info->flags |= IEEE80211_TX_STATUS_EOSP | 1882 IEEE80211_TX_CTL_REQ_TX_STATUS; 1883 break; 1884 } 1885 1886 /* For uAPSD, things are a bit more complicated. If the 1887 * last frame has a QoS header (i.e. is a QoS-data or 1888 * QoS-nulldata frame) then just set the EOSP bit there 1889 * and be done. 1890 * If the frame doesn't have a QoS header (which means 1891 * it should be a bufferable MMPDU) then we can't set 1892 * the EOSP bit in the QoS header; add a QoS-nulldata 1893 * frame to the list to send it after the MMPDU. 1894 * 1895 * Note that this code is only in the mac80211-release 1896 * code path, we assume that the driver will not buffer 1897 * anything but QoS-data frames, or if it does, will 1898 * create the QoS-nulldata frame by itself if needed. 1899 * 1900 * Cf. 802.11-2012 10.2.1.10 (c). 1901 */ 1902 if (qoshdr) { 1903 *qoshdr |= IEEE80211_QOS_CTL_EOSP; 1904 1905 info->flags |= IEEE80211_TX_STATUS_EOSP | 1906 IEEE80211_TX_CTL_REQ_TX_STATUS; 1907 } else { 1908 /* The standard isn't completely clear on this 1909 * as it says the more-data bit should be set 1910 * if there are more BUs. The QoS-Null frame 1911 * we're about to send isn't buffered yet, we 1912 * only create it below, but let's pretend it 1913 * was buffered just in case some clients only 1914 * expect more-data=0 when eosp=1. 1915 */ 1916 hdr->frame_control |= 1917 cpu_to_le16(IEEE80211_FCTL_MOREDATA); 1918 need_null = true; 1919 num++; 1920 } 1921 break; 1922 } 1923 1924 drv_allow_buffered_frames(local, sta, tids, num, 1925 reason, more_data); 1926 1927 ieee80211_add_pending_skbs(local, &pending); 1928 1929 if (need_null) 1930 ieee80211_send_null_response( 1931 sta, find_highest_prio_tid(tids), 1932 reason, false, false); 1933 1934 sta_info_recalc_tim(sta); 1935 } else { 1936 int tid; 1937 1938 /* 1939 * We need to release a frame that is buffered somewhere in the 1940 * driver ... it'll have to handle that. 1941 * Note that the driver also has to check the number of frames 1942 * on the TIDs we're releasing from - if there are more than 1943 * n_frames it has to set the more-data bit (if we didn't ask 1944 * it to set it anyway due to other buffered frames); if there 1945 * are fewer than n_frames it has to make sure to adjust that 1946 * to allow the service period to end properly. 1947 */ 1948 drv_release_buffered_frames(local, sta, driver_release_tids, 1949 n_frames, reason, more_data); 1950 1951 /* 1952 * Note that we don't recalculate the TIM bit here as it would 1953 * most likely have no effect at all unless the driver told us 1954 * that the TID(s) became empty before returning here from the 1955 * release function. 1956 * Either way, however, when the driver tells us that the TID(s) 1957 * became empty or we find that a txq became empty, we'll do the 1958 * TIM recalculation. 1959 */ 1960 1961 if (!sta->sta.txq[0]) 1962 return; 1963 1964 for (tid = 0; tid < ARRAY_SIZE(sta->sta.txq); tid++) { 1965 if (!sta->sta.txq[tid] || 1966 !(driver_release_tids & BIT(tid)) || 1967 txq_has_queue(sta->sta.txq[tid])) 1968 continue; 1969 1970 sta_info_recalc_tim(sta); 1971 break; 1972 } 1973 } 1974 } 1975 1976 void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta) 1977 { 1978 u8 ignore_for_response = sta->sta.uapsd_queues; 1979 1980 /* 1981 * If all ACs are delivery-enabled then we should reply 1982 * from any of them, if only some are enabled we reply 1983 * only from the non-enabled ones. 1984 */ 1985 if (ignore_for_response == BIT(IEEE80211_NUM_ACS) - 1) 1986 ignore_for_response = 0; 1987 1988 ieee80211_sta_ps_deliver_response(sta, 1, ignore_for_response, 1989 IEEE80211_FRAME_RELEASE_PSPOLL); 1990 } 1991 1992 void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta) 1993 { 1994 int n_frames = sta->sta.max_sp; 1995 u8 delivery_enabled = sta->sta.uapsd_queues; 1996 1997 /* 1998 * If we ever grow support for TSPEC this might happen if 1999 * the TSPEC update from hostapd comes in between a trigger 2000 * frame setting WLAN_STA_UAPSD in the RX path and this 2001 * actually getting called. 2002 */ 2003 if (!delivery_enabled) 2004 return; 2005 2006 switch (sta->sta.max_sp) { 2007 case 1: 2008 n_frames = 2; 2009 break; 2010 case 2: 2011 n_frames = 4; 2012 break; 2013 case 3: 2014 n_frames = 6; 2015 break; 2016 case 0: 2017 /* XXX: what is a good value? */ 2018 n_frames = 128; 2019 break; 2020 } 2021 2022 ieee80211_sta_ps_deliver_response(sta, n_frames, ~delivery_enabled, 2023 IEEE80211_FRAME_RELEASE_UAPSD); 2024 } 2025 2026 void ieee80211_sta_block_awake(struct ieee80211_hw *hw, 2027 struct ieee80211_sta *pubsta, bool block) 2028 { 2029 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 2030 2031 trace_api_sta_block_awake(sta->local, pubsta, block); 2032 2033 if (block) { 2034 set_sta_flag(sta, WLAN_STA_PS_DRIVER); 2035 ieee80211_clear_fast_xmit(sta); 2036 return; 2037 } 2038 2039 if (!test_sta_flag(sta, WLAN_STA_PS_DRIVER)) 2040 return; 2041 2042 if (!test_sta_flag(sta, WLAN_STA_PS_STA)) { 2043 set_sta_flag(sta, WLAN_STA_PS_DELIVER); 2044 clear_sta_flag(sta, WLAN_STA_PS_DRIVER); 2045 ieee80211_queue_work(hw, &sta->drv_deliver_wk); 2046 } else if (test_sta_flag(sta, WLAN_STA_PSPOLL) || 2047 test_sta_flag(sta, WLAN_STA_UAPSD)) { 2048 /* must be asleep in this case */ 2049 clear_sta_flag(sta, WLAN_STA_PS_DRIVER); 2050 ieee80211_queue_work(hw, &sta->drv_deliver_wk); 2051 } else { 2052 clear_sta_flag(sta, WLAN_STA_PS_DRIVER); 2053 ieee80211_check_fast_xmit(sta); 2054 } 2055 } 2056 EXPORT_SYMBOL(ieee80211_sta_block_awake); 2057 2058 void ieee80211_sta_eosp(struct ieee80211_sta *pubsta) 2059 { 2060 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 2061 struct ieee80211_local *local = sta->local; 2062 2063 trace_api_eosp(local, pubsta); 2064 2065 clear_sta_flag(sta, WLAN_STA_SP); 2066 } 2067 EXPORT_SYMBOL(ieee80211_sta_eosp); 2068 2069 void ieee80211_send_eosp_nullfunc(struct ieee80211_sta *pubsta, int tid) 2070 { 2071 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 2072 enum ieee80211_frame_release_type reason; 2073 bool more_data; 2074 2075 trace_api_send_eosp_nullfunc(sta->local, pubsta, tid); 2076 2077 reason = IEEE80211_FRAME_RELEASE_UAPSD; 2078 more_data = ieee80211_sta_ps_more_data(sta, ~sta->sta.uapsd_queues, 2079 reason, 0); 2080 2081 ieee80211_send_null_response(sta, tid, reason, false, more_data); 2082 } 2083 EXPORT_SYMBOL(ieee80211_send_eosp_nullfunc); 2084 2085 void ieee80211_sta_set_buffered(struct ieee80211_sta *pubsta, 2086 u8 tid, bool buffered) 2087 { 2088 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 2089 2090 if (WARN_ON(tid >= IEEE80211_NUM_TIDS)) 2091 return; 2092 2093 trace_api_sta_set_buffered(sta->local, pubsta, tid, buffered); 2094 2095 if (buffered) 2096 set_bit(tid, &sta->driver_buffered_tids); 2097 else 2098 clear_bit(tid, &sta->driver_buffered_tids); 2099 2100 sta_info_recalc_tim(sta); 2101 } 2102 EXPORT_SYMBOL(ieee80211_sta_set_buffered); 2103 2104 void ieee80211_sta_register_airtime(struct ieee80211_sta *pubsta, u8 tid, 2105 u32 tx_airtime, u32 rx_airtime) 2106 { 2107 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 2108 struct ieee80211_local *local = sta->sdata->local; 2109 u8 ac = ieee80211_ac_from_tid(tid); 2110 u32 airtime = 0; 2111 u32 diff; 2112 2113 if (sta->local->airtime_flags & AIRTIME_USE_TX) 2114 airtime += tx_airtime; 2115 if (sta->local->airtime_flags & AIRTIME_USE_RX) 2116 airtime += rx_airtime; 2117 2118 spin_lock_bh(&local->active_txq_lock[ac]); 2119 sta->airtime[ac].tx_airtime += tx_airtime; 2120 sta->airtime[ac].rx_airtime += rx_airtime; 2121 2122 diff = (u32)jiffies - sta->airtime[ac].last_active; 2123 if (diff <= AIRTIME_ACTIVE_DURATION) 2124 sta->airtime[ac].deficit -= airtime; 2125 2126 spin_unlock_bh(&local->active_txq_lock[ac]); 2127 } 2128 EXPORT_SYMBOL(ieee80211_sta_register_airtime); 2129 2130 void ieee80211_sta_recalc_aggregates(struct ieee80211_sta *pubsta) 2131 { 2132 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 2133 struct ieee80211_link_sta *link_sta; 2134 int link_id, i; 2135 bool first = true; 2136 2137 if (!pubsta->valid_links || !pubsta->mlo) { 2138 pubsta->cur = &pubsta->deflink.agg; 2139 return; 2140 } 2141 2142 rcu_read_lock(); 2143 for_each_sta_active_link(&sta->sdata->vif, pubsta, link_sta, link_id) { 2144 if (first) { 2145 sta->cur = pubsta->deflink.agg; 2146 first = false; 2147 continue; 2148 } 2149 2150 sta->cur.max_amsdu_len = 2151 min(sta->cur.max_amsdu_len, 2152 link_sta->agg.max_amsdu_len); 2153 sta->cur.max_rc_amsdu_len = 2154 min(sta->cur.max_rc_amsdu_len, 2155 link_sta->agg.max_rc_amsdu_len); 2156 2157 for (i = 0; i < ARRAY_SIZE(sta->cur.max_tid_amsdu_len); i++) 2158 sta->cur.max_tid_amsdu_len[i] = 2159 min(sta->cur.max_tid_amsdu_len[i], 2160 link_sta->agg.max_tid_amsdu_len[i]); 2161 } 2162 rcu_read_unlock(); 2163 2164 pubsta->cur = &sta->cur; 2165 } 2166 EXPORT_SYMBOL(ieee80211_sta_recalc_aggregates); 2167 2168 void ieee80211_sta_update_pending_airtime(struct ieee80211_local *local, 2169 struct sta_info *sta, u8 ac, 2170 u16 tx_airtime, bool tx_completed) 2171 { 2172 int tx_pending; 2173 2174 if (!wiphy_ext_feature_isset(local->hw.wiphy, NL80211_EXT_FEATURE_AQL)) 2175 return; 2176 2177 if (!tx_completed) { 2178 if (sta) 2179 atomic_add(tx_airtime, 2180 &sta->airtime[ac].aql_tx_pending); 2181 2182 atomic_add(tx_airtime, &local->aql_total_pending_airtime); 2183 atomic_add(tx_airtime, &local->aql_ac_pending_airtime[ac]); 2184 return; 2185 } 2186 2187 if (sta) { 2188 tx_pending = atomic_sub_return(tx_airtime, 2189 &sta->airtime[ac].aql_tx_pending); 2190 if (tx_pending < 0) 2191 atomic_cmpxchg(&sta->airtime[ac].aql_tx_pending, 2192 tx_pending, 0); 2193 } 2194 2195 atomic_sub(tx_airtime, &local->aql_total_pending_airtime); 2196 tx_pending = atomic_sub_return(tx_airtime, 2197 &local->aql_ac_pending_airtime[ac]); 2198 if (WARN_ONCE(tx_pending < 0, 2199 "Device %s AC %d pending airtime underflow: %u, %u", 2200 wiphy_name(local->hw.wiphy), ac, tx_pending, 2201 tx_airtime)) { 2202 atomic_cmpxchg(&local->aql_ac_pending_airtime[ac], 2203 tx_pending, 0); 2204 atomic_sub(tx_pending, &local->aql_total_pending_airtime); 2205 } 2206 } 2207 2208 int sta_info_move_state(struct sta_info *sta, 2209 enum ieee80211_sta_state new_state) 2210 { 2211 might_sleep(); 2212 2213 if (sta->sta_state == new_state) 2214 return 0; 2215 2216 /* check allowed transitions first */ 2217 2218 switch (new_state) { 2219 case IEEE80211_STA_NONE: 2220 if (sta->sta_state != IEEE80211_STA_AUTH) 2221 return -EINVAL; 2222 break; 2223 case IEEE80211_STA_AUTH: 2224 if (sta->sta_state != IEEE80211_STA_NONE && 2225 sta->sta_state != IEEE80211_STA_ASSOC) 2226 return -EINVAL; 2227 break; 2228 case IEEE80211_STA_ASSOC: 2229 if (sta->sta_state != IEEE80211_STA_AUTH && 2230 sta->sta_state != IEEE80211_STA_AUTHORIZED) 2231 return -EINVAL; 2232 break; 2233 case IEEE80211_STA_AUTHORIZED: 2234 if (sta->sta_state != IEEE80211_STA_ASSOC) 2235 return -EINVAL; 2236 break; 2237 default: 2238 WARN(1, "invalid state %d", new_state); 2239 return -EINVAL; 2240 } 2241 2242 sta_dbg(sta->sdata, "moving STA %pM to state %d\n", 2243 sta->sta.addr, new_state); 2244 2245 /* 2246 * notify the driver before the actual changes so it can 2247 * fail the transition 2248 */ 2249 if (test_sta_flag(sta, WLAN_STA_INSERTED)) { 2250 int err = drv_sta_state(sta->local, sta->sdata, sta, 2251 sta->sta_state, new_state); 2252 if (err) 2253 return err; 2254 } 2255 2256 /* reflect the change in all state variables */ 2257 2258 switch (new_state) { 2259 case IEEE80211_STA_NONE: 2260 if (sta->sta_state == IEEE80211_STA_AUTH) 2261 clear_bit(WLAN_STA_AUTH, &sta->_flags); 2262 break; 2263 case IEEE80211_STA_AUTH: 2264 if (sta->sta_state == IEEE80211_STA_NONE) { 2265 set_bit(WLAN_STA_AUTH, &sta->_flags); 2266 } else if (sta->sta_state == IEEE80211_STA_ASSOC) { 2267 clear_bit(WLAN_STA_ASSOC, &sta->_flags); 2268 ieee80211_recalc_min_chandef(sta->sdata, -1); 2269 if (!sta->sta.support_p2p_ps) 2270 ieee80211_recalc_p2p_go_ps_allowed(sta->sdata); 2271 } 2272 break; 2273 case IEEE80211_STA_ASSOC: 2274 if (sta->sta_state == IEEE80211_STA_AUTH) { 2275 set_bit(WLAN_STA_ASSOC, &sta->_flags); 2276 sta->assoc_at = ktime_get_boottime_ns(); 2277 ieee80211_recalc_min_chandef(sta->sdata, -1); 2278 if (!sta->sta.support_p2p_ps) 2279 ieee80211_recalc_p2p_go_ps_allowed(sta->sdata); 2280 } else if (sta->sta_state == IEEE80211_STA_AUTHORIZED) { 2281 ieee80211_vif_dec_num_mcast(sta->sdata); 2282 clear_bit(WLAN_STA_AUTHORIZED, &sta->_flags); 2283 ieee80211_clear_fast_xmit(sta); 2284 ieee80211_clear_fast_rx(sta); 2285 } 2286 break; 2287 case IEEE80211_STA_AUTHORIZED: 2288 if (sta->sta_state == IEEE80211_STA_ASSOC) { 2289 ieee80211_vif_inc_num_mcast(sta->sdata); 2290 set_bit(WLAN_STA_AUTHORIZED, &sta->_flags); 2291 ieee80211_check_fast_xmit(sta); 2292 ieee80211_check_fast_rx(sta); 2293 } 2294 if (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN || 2295 sta->sdata->vif.type == NL80211_IFTYPE_AP) 2296 cfg80211_send_layer2_update(sta->sdata->dev, 2297 sta->sta.addr); 2298 break; 2299 default: 2300 break; 2301 } 2302 2303 sta->sta_state = new_state; 2304 2305 return 0; 2306 } 2307 2308 static struct ieee80211_sta_rx_stats * 2309 sta_get_last_rx_stats(struct sta_info *sta) 2310 { 2311 struct ieee80211_sta_rx_stats *stats = &sta->deflink.rx_stats; 2312 int cpu; 2313 2314 if (!sta->deflink.pcpu_rx_stats) 2315 return stats; 2316 2317 for_each_possible_cpu(cpu) { 2318 struct ieee80211_sta_rx_stats *cpustats; 2319 2320 cpustats = per_cpu_ptr(sta->deflink.pcpu_rx_stats, cpu); 2321 2322 if (time_after(cpustats->last_rx, stats->last_rx)) 2323 stats = cpustats; 2324 } 2325 2326 return stats; 2327 } 2328 2329 static void sta_stats_decode_rate(struct ieee80211_local *local, u32 rate, 2330 struct rate_info *rinfo) 2331 { 2332 rinfo->bw = STA_STATS_GET(BW, rate); 2333 2334 switch (STA_STATS_GET(TYPE, rate)) { 2335 case STA_STATS_RATE_TYPE_VHT: 2336 rinfo->flags = RATE_INFO_FLAGS_VHT_MCS; 2337 rinfo->mcs = STA_STATS_GET(VHT_MCS, rate); 2338 rinfo->nss = STA_STATS_GET(VHT_NSS, rate); 2339 if (STA_STATS_GET(SGI, rate)) 2340 rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI; 2341 break; 2342 case STA_STATS_RATE_TYPE_HT: 2343 rinfo->flags = RATE_INFO_FLAGS_MCS; 2344 rinfo->mcs = STA_STATS_GET(HT_MCS, rate); 2345 if (STA_STATS_GET(SGI, rate)) 2346 rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI; 2347 break; 2348 case STA_STATS_RATE_TYPE_LEGACY: { 2349 struct ieee80211_supported_band *sband; 2350 u16 brate; 2351 unsigned int shift; 2352 int band = STA_STATS_GET(LEGACY_BAND, rate); 2353 int rate_idx = STA_STATS_GET(LEGACY_IDX, rate); 2354 2355 sband = local->hw.wiphy->bands[band]; 2356 2357 if (WARN_ON_ONCE(!sband->bitrates)) 2358 break; 2359 2360 brate = sband->bitrates[rate_idx].bitrate; 2361 if (rinfo->bw == RATE_INFO_BW_5) 2362 shift = 2; 2363 else if (rinfo->bw == RATE_INFO_BW_10) 2364 shift = 1; 2365 else 2366 shift = 0; 2367 rinfo->legacy = DIV_ROUND_UP(brate, 1 << shift); 2368 break; 2369 } 2370 case STA_STATS_RATE_TYPE_HE: 2371 rinfo->flags = RATE_INFO_FLAGS_HE_MCS; 2372 rinfo->mcs = STA_STATS_GET(HE_MCS, rate); 2373 rinfo->nss = STA_STATS_GET(HE_NSS, rate); 2374 rinfo->he_gi = STA_STATS_GET(HE_GI, rate); 2375 rinfo->he_ru_alloc = STA_STATS_GET(HE_RU, rate); 2376 rinfo->he_dcm = STA_STATS_GET(HE_DCM, rate); 2377 break; 2378 } 2379 } 2380 2381 static int sta_set_rate_info_rx(struct sta_info *sta, struct rate_info *rinfo) 2382 { 2383 u16 rate = READ_ONCE(sta_get_last_rx_stats(sta)->last_rate); 2384 2385 if (rate == STA_STATS_RATE_INVALID) 2386 return -EINVAL; 2387 2388 sta_stats_decode_rate(sta->local, rate, rinfo); 2389 return 0; 2390 } 2391 2392 static inline u64 sta_get_tidstats_msdu(struct ieee80211_sta_rx_stats *rxstats, 2393 int tid) 2394 { 2395 unsigned int start; 2396 u64 value; 2397 2398 do { 2399 start = u64_stats_fetch_begin_irq(&rxstats->syncp); 2400 value = rxstats->msdu[tid]; 2401 } while (u64_stats_fetch_retry_irq(&rxstats->syncp, start)); 2402 2403 return value; 2404 } 2405 2406 static void sta_set_tidstats(struct sta_info *sta, 2407 struct cfg80211_tid_stats *tidstats, 2408 int tid) 2409 { 2410 struct ieee80211_local *local = sta->local; 2411 int cpu; 2412 2413 if (!(tidstats->filled & BIT(NL80211_TID_STATS_RX_MSDU))) { 2414 tidstats->rx_msdu += sta_get_tidstats_msdu(&sta->deflink.rx_stats, 2415 tid); 2416 2417 if (sta->deflink.pcpu_rx_stats) { 2418 for_each_possible_cpu(cpu) { 2419 struct ieee80211_sta_rx_stats *cpurxs; 2420 2421 cpurxs = per_cpu_ptr(sta->deflink.pcpu_rx_stats, 2422 cpu); 2423 tidstats->rx_msdu += 2424 sta_get_tidstats_msdu(cpurxs, tid); 2425 } 2426 } 2427 2428 tidstats->filled |= BIT(NL80211_TID_STATS_RX_MSDU); 2429 } 2430 2431 if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU))) { 2432 tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU); 2433 tidstats->tx_msdu = sta->deflink.tx_stats.msdu[tid]; 2434 } 2435 2436 if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU_RETRIES)) && 2437 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 2438 tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU_RETRIES); 2439 tidstats->tx_msdu_retries = sta->deflink.status_stats.msdu_retries[tid]; 2440 } 2441 2442 if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU_FAILED)) && 2443 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 2444 tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU_FAILED); 2445 tidstats->tx_msdu_failed = sta->deflink.status_stats.msdu_failed[tid]; 2446 } 2447 2448 if (local->ops->wake_tx_queue && tid < IEEE80211_NUM_TIDS) { 2449 spin_lock_bh(&local->fq.lock); 2450 rcu_read_lock(); 2451 2452 tidstats->filled |= BIT(NL80211_TID_STATS_TXQ_STATS); 2453 ieee80211_fill_txq_stats(&tidstats->txq_stats, 2454 to_txq_info(sta->sta.txq[tid])); 2455 2456 rcu_read_unlock(); 2457 spin_unlock_bh(&local->fq.lock); 2458 } 2459 } 2460 2461 static inline u64 sta_get_stats_bytes(struct ieee80211_sta_rx_stats *rxstats) 2462 { 2463 unsigned int start; 2464 u64 value; 2465 2466 do { 2467 start = u64_stats_fetch_begin_irq(&rxstats->syncp); 2468 value = rxstats->bytes; 2469 } while (u64_stats_fetch_retry_irq(&rxstats->syncp, start)); 2470 2471 return value; 2472 } 2473 2474 void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo, 2475 bool tidstats) 2476 { 2477 struct ieee80211_sub_if_data *sdata = sta->sdata; 2478 struct ieee80211_local *local = sdata->local; 2479 u32 thr = 0; 2480 int i, ac, cpu; 2481 struct ieee80211_sta_rx_stats *last_rxstats; 2482 2483 last_rxstats = sta_get_last_rx_stats(sta); 2484 2485 sinfo->generation = sdata->local->sta_generation; 2486 2487 /* do before driver, so beacon filtering drivers have a 2488 * chance to e.g. just add the number of filtered beacons 2489 * (or just modify the value entirely, of course) 2490 */ 2491 if (sdata->vif.type == NL80211_IFTYPE_STATION) 2492 sinfo->rx_beacon = sdata->deflink.u.mgd.count_beacon_signal; 2493 2494 drv_sta_statistics(local, sdata, &sta->sta, sinfo); 2495 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_INACTIVE_TIME) | 2496 BIT_ULL(NL80211_STA_INFO_STA_FLAGS) | 2497 BIT_ULL(NL80211_STA_INFO_BSS_PARAM) | 2498 BIT_ULL(NL80211_STA_INFO_CONNECTED_TIME) | 2499 BIT_ULL(NL80211_STA_INFO_ASSOC_AT_BOOTTIME) | 2500 BIT_ULL(NL80211_STA_INFO_RX_DROP_MISC); 2501 2502 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 2503 sinfo->beacon_loss_count = 2504 sdata->deflink.u.mgd.beacon_loss_count; 2505 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_BEACON_LOSS); 2506 } 2507 2508 sinfo->connected_time = ktime_get_seconds() - sta->last_connected; 2509 sinfo->assoc_at = sta->assoc_at; 2510 sinfo->inactive_time = 2511 jiffies_to_msecs(jiffies - ieee80211_sta_last_active(sta)); 2512 2513 if (!(sinfo->filled & (BIT_ULL(NL80211_STA_INFO_TX_BYTES64) | 2514 BIT_ULL(NL80211_STA_INFO_TX_BYTES)))) { 2515 sinfo->tx_bytes = 0; 2516 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 2517 sinfo->tx_bytes += sta->deflink.tx_stats.bytes[ac]; 2518 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_BYTES64); 2519 } 2520 2521 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_PACKETS))) { 2522 sinfo->tx_packets = 0; 2523 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 2524 sinfo->tx_packets += sta->deflink.tx_stats.packets[ac]; 2525 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_PACKETS); 2526 } 2527 2528 if (!(sinfo->filled & (BIT_ULL(NL80211_STA_INFO_RX_BYTES64) | 2529 BIT_ULL(NL80211_STA_INFO_RX_BYTES)))) { 2530 sinfo->rx_bytes += sta_get_stats_bytes(&sta->deflink.rx_stats); 2531 2532 if (sta->deflink.pcpu_rx_stats) { 2533 for_each_possible_cpu(cpu) { 2534 struct ieee80211_sta_rx_stats *cpurxs; 2535 2536 cpurxs = per_cpu_ptr(sta->deflink.pcpu_rx_stats, 2537 cpu); 2538 sinfo->rx_bytes += sta_get_stats_bytes(cpurxs); 2539 } 2540 } 2541 2542 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_BYTES64); 2543 } 2544 2545 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_RX_PACKETS))) { 2546 sinfo->rx_packets = sta->deflink.rx_stats.packets; 2547 if (sta->deflink.pcpu_rx_stats) { 2548 for_each_possible_cpu(cpu) { 2549 struct ieee80211_sta_rx_stats *cpurxs; 2550 2551 cpurxs = per_cpu_ptr(sta->deflink.pcpu_rx_stats, 2552 cpu); 2553 sinfo->rx_packets += cpurxs->packets; 2554 } 2555 } 2556 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_PACKETS); 2557 } 2558 2559 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_RETRIES))) { 2560 sinfo->tx_retries = sta->deflink.status_stats.retry_count; 2561 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_RETRIES); 2562 } 2563 2564 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_FAILED))) { 2565 sinfo->tx_failed = sta->deflink.status_stats.retry_failed; 2566 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_FAILED); 2567 } 2568 2569 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_RX_DURATION))) { 2570 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 2571 sinfo->rx_duration += sta->airtime[ac].rx_airtime; 2572 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_DURATION); 2573 } 2574 2575 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_DURATION))) { 2576 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 2577 sinfo->tx_duration += sta->airtime[ac].tx_airtime; 2578 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_DURATION); 2579 } 2580 2581 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_AIRTIME_WEIGHT))) { 2582 sinfo->airtime_weight = sta->airtime_weight; 2583 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_AIRTIME_WEIGHT); 2584 } 2585 2586 sinfo->rx_dropped_misc = sta->deflink.rx_stats.dropped; 2587 if (sta->deflink.pcpu_rx_stats) { 2588 for_each_possible_cpu(cpu) { 2589 struct ieee80211_sta_rx_stats *cpurxs; 2590 2591 cpurxs = per_cpu_ptr(sta->deflink.pcpu_rx_stats, cpu); 2592 sinfo->rx_dropped_misc += cpurxs->dropped; 2593 } 2594 } 2595 2596 if (sdata->vif.type == NL80211_IFTYPE_STATION && 2597 !(sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)) { 2598 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_BEACON_RX) | 2599 BIT_ULL(NL80211_STA_INFO_BEACON_SIGNAL_AVG); 2600 sinfo->rx_beacon_signal_avg = ieee80211_ave_rssi(&sdata->vif); 2601 } 2602 2603 if (ieee80211_hw_check(&sta->local->hw, SIGNAL_DBM) || 2604 ieee80211_hw_check(&sta->local->hw, SIGNAL_UNSPEC)) { 2605 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_SIGNAL))) { 2606 sinfo->signal = (s8)last_rxstats->last_signal; 2607 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_SIGNAL); 2608 } 2609 2610 if (!sta->deflink.pcpu_rx_stats && 2611 !(sinfo->filled & BIT_ULL(NL80211_STA_INFO_SIGNAL_AVG))) { 2612 sinfo->signal_avg = 2613 -ewma_signal_read(&sta->deflink.rx_stats_avg.signal); 2614 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_SIGNAL_AVG); 2615 } 2616 } 2617 2618 /* for the average - if pcpu_rx_stats isn't set - rxstats must point to 2619 * the sta->rx_stats struct, so the check here is fine with and without 2620 * pcpu statistics 2621 */ 2622 if (last_rxstats->chains && 2623 !(sinfo->filled & (BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL) | 2624 BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL_AVG)))) { 2625 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL); 2626 if (!sta->deflink.pcpu_rx_stats) 2627 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL_AVG); 2628 2629 sinfo->chains = last_rxstats->chains; 2630 2631 for (i = 0; i < ARRAY_SIZE(sinfo->chain_signal); i++) { 2632 sinfo->chain_signal[i] = 2633 last_rxstats->chain_signal_last[i]; 2634 sinfo->chain_signal_avg[i] = 2635 -ewma_signal_read(&sta->deflink.rx_stats_avg.chain_signal[i]); 2636 } 2637 } 2638 2639 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_BITRATE)) && 2640 !sta->sta.valid_links) { 2641 sta_set_rate_info_tx(sta, &sta->deflink.tx_stats.last_rate, 2642 &sinfo->txrate); 2643 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_BITRATE); 2644 } 2645 2646 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_RX_BITRATE)) && 2647 !sta->sta.valid_links) { 2648 if (sta_set_rate_info_rx(sta, &sinfo->rxrate) == 0) 2649 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_BITRATE); 2650 } 2651 2652 if (tidstats && !cfg80211_sinfo_alloc_tid_stats(sinfo, GFP_KERNEL)) { 2653 for (i = 0; i < IEEE80211_NUM_TIDS + 1; i++) 2654 sta_set_tidstats(sta, &sinfo->pertid[i], i); 2655 } 2656 2657 if (ieee80211_vif_is_mesh(&sdata->vif)) { 2658 #ifdef CONFIG_MAC80211_MESH 2659 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_LLID) | 2660 BIT_ULL(NL80211_STA_INFO_PLID) | 2661 BIT_ULL(NL80211_STA_INFO_PLINK_STATE) | 2662 BIT_ULL(NL80211_STA_INFO_LOCAL_PM) | 2663 BIT_ULL(NL80211_STA_INFO_PEER_PM) | 2664 BIT_ULL(NL80211_STA_INFO_NONPEER_PM) | 2665 BIT_ULL(NL80211_STA_INFO_CONNECTED_TO_GATE) | 2666 BIT_ULL(NL80211_STA_INFO_CONNECTED_TO_AS); 2667 2668 sinfo->llid = sta->mesh->llid; 2669 sinfo->plid = sta->mesh->plid; 2670 sinfo->plink_state = sta->mesh->plink_state; 2671 if (test_sta_flag(sta, WLAN_STA_TOFFSET_KNOWN)) { 2672 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_T_OFFSET); 2673 sinfo->t_offset = sta->mesh->t_offset; 2674 } 2675 sinfo->local_pm = sta->mesh->local_pm; 2676 sinfo->peer_pm = sta->mesh->peer_pm; 2677 sinfo->nonpeer_pm = sta->mesh->nonpeer_pm; 2678 sinfo->connected_to_gate = sta->mesh->connected_to_gate; 2679 sinfo->connected_to_as = sta->mesh->connected_to_as; 2680 #endif 2681 } 2682 2683 sinfo->bss_param.flags = 0; 2684 if (sdata->vif.bss_conf.use_cts_prot) 2685 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_CTS_PROT; 2686 if (sdata->vif.bss_conf.use_short_preamble) 2687 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_PREAMBLE; 2688 if (sdata->vif.bss_conf.use_short_slot) 2689 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_SLOT_TIME; 2690 sinfo->bss_param.dtim_period = sdata->vif.bss_conf.dtim_period; 2691 sinfo->bss_param.beacon_interval = sdata->vif.bss_conf.beacon_int; 2692 2693 sinfo->sta_flags.set = 0; 2694 sinfo->sta_flags.mask = BIT(NL80211_STA_FLAG_AUTHORIZED) | 2695 BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) | 2696 BIT(NL80211_STA_FLAG_WME) | 2697 BIT(NL80211_STA_FLAG_MFP) | 2698 BIT(NL80211_STA_FLAG_AUTHENTICATED) | 2699 BIT(NL80211_STA_FLAG_ASSOCIATED) | 2700 BIT(NL80211_STA_FLAG_TDLS_PEER); 2701 if (test_sta_flag(sta, WLAN_STA_AUTHORIZED)) 2702 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHORIZED); 2703 if (test_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE)) 2704 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE); 2705 if (sta->sta.wme) 2706 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_WME); 2707 if (test_sta_flag(sta, WLAN_STA_MFP)) 2708 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_MFP); 2709 if (test_sta_flag(sta, WLAN_STA_AUTH)) 2710 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHENTICATED); 2711 if (test_sta_flag(sta, WLAN_STA_ASSOC)) 2712 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_ASSOCIATED); 2713 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER)) 2714 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_TDLS_PEER); 2715 2716 thr = sta_get_expected_throughput(sta); 2717 2718 if (thr != 0) { 2719 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_EXPECTED_THROUGHPUT); 2720 sinfo->expected_throughput = thr; 2721 } 2722 2723 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL)) && 2724 sta->deflink.status_stats.ack_signal_filled) { 2725 sinfo->ack_signal = sta->deflink.status_stats.last_ack_signal; 2726 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL); 2727 } 2728 2729 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL_AVG)) && 2730 sta->deflink.status_stats.ack_signal_filled) { 2731 sinfo->avg_ack_signal = 2732 -(s8)ewma_avg_signal_read( 2733 &sta->deflink.status_stats.avg_ack_signal); 2734 sinfo->filled |= 2735 BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL_AVG); 2736 } 2737 2738 if (ieee80211_vif_is_mesh(&sdata->vif)) { 2739 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_AIRTIME_LINK_METRIC); 2740 sinfo->airtime_link_metric = 2741 airtime_link_metric_get(local, sta); 2742 } 2743 } 2744 2745 u32 sta_get_expected_throughput(struct sta_info *sta) 2746 { 2747 struct ieee80211_sub_if_data *sdata = sta->sdata; 2748 struct ieee80211_local *local = sdata->local; 2749 struct rate_control_ref *ref = NULL; 2750 u32 thr = 0; 2751 2752 if (test_sta_flag(sta, WLAN_STA_RATE_CONTROL)) 2753 ref = local->rate_ctrl; 2754 2755 /* check if the driver has a SW RC implementation */ 2756 if (ref && ref->ops->get_expected_throughput) 2757 thr = ref->ops->get_expected_throughput(sta->rate_ctrl_priv); 2758 else 2759 thr = drv_get_expected_throughput(local, sta); 2760 2761 return thr; 2762 } 2763 2764 unsigned long ieee80211_sta_last_active(struct sta_info *sta) 2765 { 2766 struct ieee80211_sta_rx_stats *stats = sta_get_last_rx_stats(sta); 2767 2768 if (!sta->deflink.status_stats.last_ack || 2769 time_after(stats->last_rx, sta->deflink.status_stats.last_ack)) 2770 return stats->last_rx; 2771 return sta->deflink.status_stats.last_ack; 2772 } 2773 2774 static void sta_update_codel_params(struct sta_info *sta, u32 thr) 2775 { 2776 if (!sta->sdata->local->ops->wake_tx_queue) 2777 return; 2778 2779 if (thr && thr < STA_SLOW_THRESHOLD * sta->local->num_sta) { 2780 sta->cparams.target = MS2TIME(50); 2781 sta->cparams.interval = MS2TIME(300); 2782 sta->cparams.ecn = false; 2783 } else { 2784 sta->cparams.target = MS2TIME(20); 2785 sta->cparams.interval = MS2TIME(100); 2786 sta->cparams.ecn = true; 2787 } 2788 } 2789 2790 void ieee80211_sta_set_expected_throughput(struct ieee80211_sta *pubsta, 2791 u32 thr) 2792 { 2793 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 2794 2795 sta_update_codel_params(sta, thr); 2796 } 2797 2798 int ieee80211_sta_allocate_link(struct sta_info *sta, unsigned int link_id) 2799 { 2800 struct ieee80211_sub_if_data *sdata = sta->sdata; 2801 struct sta_link_alloc *alloc; 2802 int ret; 2803 2804 lockdep_assert_held(&sdata->local->sta_mtx); 2805 2806 /* must represent an MLD from the start */ 2807 if (WARN_ON(!sta->sta.valid_links)) 2808 return -EINVAL; 2809 2810 if (WARN_ON(sta->sta.valid_links & BIT(link_id) || 2811 sta->link[link_id])) 2812 return -EBUSY; 2813 2814 alloc = kzalloc(sizeof(*alloc), GFP_KERNEL); 2815 if (!alloc) 2816 return -ENOMEM; 2817 2818 ret = sta_info_alloc_link(sdata->local, &alloc->info, GFP_KERNEL); 2819 if (ret) { 2820 kfree(alloc); 2821 return ret; 2822 } 2823 2824 sta_info_add_link(sta, link_id, &alloc->info, &alloc->sta); 2825 2826 return 0; 2827 } 2828 2829 void ieee80211_sta_free_link(struct sta_info *sta, unsigned int link_id) 2830 { 2831 lockdep_assert_held(&sta->sdata->local->sta_mtx); 2832 2833 sta_remove_link(sta, link_id, false); 2834 } 2835 2836 int ieee80211_sta_activate_link(struct sta_info *sta, unsigned int link_id) 2837 { 2838 struct ieee80211_sub_if_data *sdata = sta->sdata; 2839 struct link_sta_info *link_sta; 2840 u16 old_links = sta->sta.valid_links; 2841 u16 new_links = old_links | BIT(link_id); 2842 int ret; 2843 2844 link_sta = rcu_dereference_protected(sta->link[link_id], 2845 lockdep_is_held(&sdata->local->sta_mtx)); 2846 2847 if (WARN_ON(old_links == new_links || !link_sta)) 2848 return -EINVAL; 2849 2850 rcu_read_lock(); 2851 if (link_sta_info_hash_lookup(sdata->local, link_sta->addr)) { 2852 rcu_read_unlock(); 2853 return -EALREADY; 2854 } 2855 /* we only modify under the mutex so this is fine */ 2856 rcu_read_unlock(); 2857 2858 sta->sta.valid_links = new_links; 2859 2860 if (!test_sta_flag(sta, WLAN_STA_INSERTED)) 2861 goto hash; 2862 2863 /* Ensure the values are updated for the driver, 2864 * redone by sta_remove_link on failure. 2865 */ 2866 ieee80211_sta_recalc_aggregates(&sta->sta); 2867 2868 ret = drv_change_sta_links(sdata->local, sdata, &sta->sta, 2869 old_links, new_links); 2870 if (ret) { 2871 sta->sta.valid_links = old_links; 2872 sta_remove_link(sta, link_id, false); 2873 return ret; 2874 } 2875 2876 hash: 2877 ret = link_sta_info_hash_add(sdata->local, link_sta); 2878 WARN_ON(ret); 2879 return 0; 2880 } 2881 2882 void ieee80211_sta_remove_link(struct sta_info *sta, unsigned int link_id) 2883 { 2884 struct ieee80211_sub_if_data *sdata = sta->sdata; 2885 u16 old_links = sta->sta.valid_links; 2886 2887 lockdep_assert_held(&sdata->local->sta_mtx); 2888 2889 sta->sta.valid_links &= ~BIT(link_id); 2890 2891 if (test_sta_flag(sta, WLAN_STA_INSERTED)) 2892 drv_change_sta_links(sdata->local, sdata, &sta->sta, 2893 old_links, sta->sta.valid_links); 2894 2895 sta_remove_link(sta, link_id, true); 2896 } 2897 2898 void ieee80211_sta_set_max_amsdu_subframes(struct sta_info *sta, 2899 const u8 *ext_capab, 2900 unsigned int ext_capab_len) 2901 { 2902 u8 val; 2903 2904 sta->sta.max_amsdu_subframes = 0; 2905 2906 if (ext_capab_len < 8) 2907 return; 2908 2909 /* The sender might not have sent the last bit, consider it to be 0 */ 2910 val = u8_get_bits(ext_capab[7], WLAN_EXT_CAPA8_MAX_MSDU_IN_AMSDU_LSB); 2911 2912 /* we did get all the bits, take the MSB as well */ 2913 if (ext_capab_len >= 9) 2914 val |= u8_get_bits(ext_capab[8], 2915 WLAN_EXT_CAPA9_MAX_MSDU_IN_AMSDU_MSB) << 1; 2916 2917 if (val) 2918 sta->sta.max_amsdu_subframes = 4 << val; 2919 } 2920 2921 #ifdef CONFIG_LOCKDEP 2922 bool lockdep_sta_mutex_held(struct ieee80211_sta *pubsta) 2923 { 2924 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 2925 2926 return lockdep_is_held(&sta->local->sta_mtx); 2927 } 2928 EXPORT_SYMBOL(lockdep_sta_mutex_held); 2929 #endif 2930