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 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 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 } 180 181 static 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 } 189 190 struct 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 */ 197 struct 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 */ 222 struct 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 } 243 244 struct 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 } 250 251 struct link_sta_info * 252 link_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 } 274 275 struct ieee80211_sta * 276 ieee80211_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 } 310 EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_link_addrs); 311 312 struct 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 } 325 326 struct 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 } 346 347 static void sta_info_free_link(struct link_sta_info *link_sta) 348 { 349 free_percpu(link_sta->pcpu_rx_stats); 350 } 351 352 static 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 */ 396 void 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 */ 444 static 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 } 450 451 static 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 } 469 470 static 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 } 484 485 static 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 } 509 510 static 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 } 526 527 static 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; 692 693 free_txq: 694 kfree(to_txq_info(sta->sta.txq[0])); 695 free: 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 } 703 704 struct 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 } 709 710 struct 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 } 718 719 static 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 } 750 751 static 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 } 787 788 static void 789 ieee80211_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 */ 819 static 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 return 0; 918 out_remove: 919 if (sta->sta.valid_links) 920 link_sta_info_hash_del(local, &sta->deflink); 921 sta_info_hash_del(local, sta); 922 list_del_rcu(&sta->list); 923 out_drop_sta: 924 local->num_sta--; 925 synchronize_net(); 926 out_cleanup: 927 cleanup_single_sta(sta); 928 mutex_unlock(&local->sta_mtx); 929 kfree(sinfo); 930 rcu_read_lock(); 931 return err; 932 } 933 934 int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU) 935 { 936 struct ieee80211_local *local = sta->local; 937 int err; 938 939 might_sleep(); 940 941 mutex_lock(&local->sta_mtx); 942 943 err = sta_info_insert_check(sta); 944 if (err) { 945 sta_info_free(local, sta); 946 mutex_unlock(&local->sta_mtx); 947 rcu_read_lock(); 948 return err; 949 } 950 951 return sta_info_insert_finish(sta); 952 } 953 954 int sta_info_insert(struct sta_info *sta) 955 { 956 int err = sta_info_insert_rcu(sta); 957 958 rcu_read_unlock(); 959 960 return err; 961 } 962 963 static inline void __bss_tim_set(u8 *tim, u16 id) 964 { 965 /* 966 * This format has been mandated by the IEEE specifications, 967 * so this line may not be changed to use the __set_bit() format. 968 */ 969 tim[id / 8] |= (1 << (id % 8)); 970 } 971 972 static inline void __bss_tim_clear(u8 *tim, u16 id) 973 { 974 /* 975 * This format has been mandated by the IEEE specifications, 976 * so this line may not be changed to use the __clear_bit() format. 977 */ 978 tim[id / 8] &= ~(1 << (id % 8)); 979 } 980 981 static inline bool __bss_tim_get(u8 *tim, u16 id) 982 { 983 /* 984 * This format has been mandated by the IEEE specifications, 985 * so this line may not be changed to use the test_bit() format. 986 */ 987 return tim[id / 8] & (1 << (id % 8)); 988 } 989 990 static unsigned long ieee80211_tids_for_ac(int ac) 991 { 992 /* If we ever support TIDs > 7, this obviously needs to be adjusted */ 993 switch (ac) { 994 case IEEE80211_AC_VO: 995 return BIT(6) | BIT(7); 996 case IEEE80211_AC_VI: 997 return BIT(4) | BIT(5); 998 case IEEE80211_AC_BE: 999 return BIT(0) | BIT(3); 1000 case IEEE80211_AC_BK: 1001 return BIT(1) | BIT(2); 1002 default: 1003 WARN_ON(1); 1004 return 0; 1005 } 1006 } 1007 1008 static void __sta_info_recalc_tim(struct sta_info *sta, bool ignore_pending) 1009 { 1010 struct ieee80211_local *local = sta->local; 1011 struct ps_data *ps; 1012 bool indicate_tim = false; 1013 u8 ignore_for_tim = sta->sta.uapsd_queues; 1014 int ac; 1015 u16 id = sta->sta.aid; 1016 1017 if (sta->sdata->vif.type == NL80211_IFTYPE_AP || 1018 sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 1019 if (WARN_ON_ONCE(!sta->sdata->bss)) 1020 return; 1021 1022 ps = &sta->sdata->bss->ps; 1023 #ifdef CONFIG_MAC80211_MESH 1024 } else if (ieee80211_vif_is_mesh(&sta->sdata->vif)) { 1025 ps = &sta->sdata->u.mesh.ps; 1026 #endif 1027 } else { 1028 return; 1029 } 1030 1031 /* No need to do anything if the driver does all */ 1032 if (ieee80211_hw_check(&local->hw, AP_LINK_PS) && !local->ops->set_tim) 1033 return; 1034 1035 if (sta->dead) 1036 goto done; 1037 1038 /* 1039 * If all ACs are delivery-enabled then we should build 1040 * the TIM bit for all ACs anyway; if only some are then 1041 * we ignore those and build the TIM bit using only the 1042 * non-enabled ones. 1043 */ 1044 if (ignore_for_tim == BIT(IEEE80211_NUM_ACS) - 1) 1045 ignore_for_tim = 0; 1046 1047 if (ignore_pending) 1048 ignore_for_tim = BIT(IEEE80211_NUM_ACS) - 1; 1049 1050 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1051 unsigned long tids; 1052 1053 if (ignore_for_tim & ieee80211_ac_to_qos_mask[ac]) 1054 continue; 1055 1056 indicate_tim |= !skb_queue_empty(&sta->tx_filtered[ac]) || 1057 !skb_queue_empty(&sta->ps_tx_buf[ac]); 1058 if (indicate_tim) 1059 break; 1060 1061 tids = ieee80211_tids_for_ac(ac); 1062 1063 indicate_tim |= 1064 sta->driver_buffered_tids & tids; 1065 indicate_tim |= 1066 sta->txq_buffered_tids & tids; 1067 } 1068 1069 done: 1070 spin_lock_bh(&local->tim_lock); 1071 1072 if (indicate_tim == __bss_tim_get(ps->tim, id)) 1073 goto out_unlock; 1074 1075 if (indicate_tim) 1076 __bss_tim_set(ps->tim, id); 1077 else 1078 __bss_tim_clear(ps->tim, id); 1079 1080 if (local->ops->set_tim && !WARN_ON(sta->dead)) { 1081 local->tim_in_locked_section = true; 1082 drv_set_tim(local, &sta->sta, indicate_tim); 1083 local->tim_in_locked_section = false; 1084 } 1085 1086 out_unlock: 1087 spin_unlock_bh(&local->tim_lock); 1088 } 1089 1090 void sta_info_recalc_tim(struct sta_info *sta) 1091 { 1092 __sta_info_recalc_tim(sta, false); 1093 } 1094 1095 static bool sta_info_buffer_expired(struct sta_info *sta, struct sk_buff *skb) 1096 { 1097 struct ieee80211_tx_info *info; 1098 int timeout; 1099 1100 if (!skb) 1101 return false; 1102 1103 info = IEEE80211_SKB_CB(skb); 1104 1105 /* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */ 1106 timeout = (sta->listen_interval * 1107 sta->sdata->vif.bss_conf.beacon_int * 1108 32 / 15625) * HZ; 1109 if (timeout < STA_TX_BUFFER_EXPIRE) 1110 timeout = STA_TX_BUFFER_EXPIRE; 1111 return time_after(jiffies, info->control.jiffies + timeout); 1112 } 1113 1114 1115 static bool sta_info_cleanup_expire_buffered_ac(struct ieee80211_local *local, 1116 struct sta_info *sta, int ac) 1117 { 1118 unsigned long flags; 1119 struct sk_buff *skb; 1120 1121 /* 1122 * First check for frames that should expire on the filtered 1123 * queue. Frames here were rejected by the driver and are on 1124 * a separate queue to avoid reordering with normal PS-buffered 1125 * frames. They also aren't accounted for right now in the 1126 * total_ps_buffered counter. 1127 */ 1128 for (;;) { 1129 spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags); 1130 skb = skb_peek(&sta->tx_filtered[ac]); 1131 if (sta_info_buffer_expired(sta, skb)) 1132 skb = __skb_dequeue(&sta->tx_filtered[ac]); 1133 else 1134 skb = NULL; 1135 spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags); 1136 1137 /* 1138 * Frames are queued in order, so if this one 1139 * hasn't expired yet we can stop testing. If 1140 * we actually reached the end of the queue we 1141 * also need to stop, of course. 1142 */ 1143 if (!skb) 1144 break; 1145 ieee80211_free_txskb(&local->hw, skb); 1146 } 1147 1148 /* 1149 * Now also check the normal PS-buffered queue, this will 1150 * only find something if the filtered queue was emptied 1151 * since the filtered frames are all before the normal PS 1152 * buffered frames. 1153 */ 1154 for (;;) { 1155 spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags); 1156 skb = skb_peek(&sta->ps_tx_buf[ac]); 1157 if (sta_info_buffer_expired(sta, skb)) 1158 skb = __skb_dequeue(&sta->ps_tx_buf[ac]); 1159 else 1160 skb = NULL; 1161 spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags); 1162 1163 /* 1164 * frames are queued in order, so if this one 1165 * hasn't expired yet (or we reached the end of 1166 * the queue) we can stop testing 1167 */ 1168 if (!skb) 1169 break; 1170 1171 local->total_ps_buffered--; 1172 ps_dbg(sta->sdata, "Buffered frame expired (STA %pM)\n", 1173 sta->sta.addr); 1174 ieee80211_free_txskb(&local->hw, skb); 1175 } 1176 1177 /* 1178 * Finally, recalculate the TIM bit for this station -- it might 1179 * now be clear because the station was too slow to retrieve its 1180 * frames. 1181 */ 1182 sta_info_recalc_tim(sta); 1183 1184 /* 1185 * Return whether there are any frames still buffered, this is 1186 * used to check whether the cleanup timer still needs to run, 1187 * if there are no frames we don't need to rearm the timer. 1188 */ 1189 return !(skb_queue_empty(&sta->ps_tx_buf[ac]) && 1190 skb_queue_empty(&sta->tx_filtered[ac])); 1191 } 1192 1193 static bool sta_info_cleanup_expire_buffered(struct ieee80211_local *local, 1194 struct sta_info *sta) 1195 { 1196 bool have_buffered = false; 1197 int ac; 1198 1199 /* This is only necessary for stations on BSS/MBSS interfaces */ 1200 if (!sta->sdata->bss && 1201 !ieee80211_vif_is_mesh(&sta->sdata->vif)) 1202 return false; 1203 1204 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 1205 have_buffered |= 1206 sta_info_cleanup_expire_buffered_ac(local, sta, ac); 1207 1208 return have_buffered; 1209 } 1210 1211 static int __must_check __sta_info_destroy_part1(struct sta_info *sta) 1212 { 1213 struct ieee80211_local *local; 1214 struct ieee80211_sub_if_data *sdata; 1215 int ret, i; 1216 1217 might_sleep(); 1218 1219 if (!sta) 1220 return -ENOENT; 1221 1222 local = sta->local; 1223 sdata = sta->sdata; 1224 1225 lockdep_assert_held(&local->sta_mtx); 1226 1227 /* 1228 * Before removing the station from the driver and 1229 * rate control, it might still start new aggregation 1230 * sessions -- block that to make sure the tear-down 1231 * will be sufficient. 1232 */ 1233 set_sta_flag(sta, WLAN_STA_BLOCK_BA); 1234 ieee80211_sta_tear_down_BA_sessions(sta, AGG_STOP_DESTROY_STA); 1235 1236 /* 1237 * Before removing the station from the driver there might be pending 1238 * rx frames on RSS queues sent prior to the disassociation - wait for 1239 * all such frames to be processed. 1240 */ 1241 drv_sync_rx_queues(local, sta); 1242 1243 for (i = 0; i < ARRAY_SIZE(sta->link); i++) { 1244 struct link_sta_info *link_sta; 1245 1246 if (!(sta->sta.valid_links & BIT(i))) 1247 continue; 1248 1249 link_sta = rcu_dereference_protected(sta->link[i], 1250 lockdep_is_held(&local->sta_mtx)); 1251 1252 link_sta_info_hash_del(local, link_sta); 1253 } 1254 1255 ret = sta_info_hash_del(local, sta); 1256 if (WARN_ON(ret)) 1257 return ret; 1258 1259 /* 1260 * for TDLS peers, make sure to return to the base channel before 1261 * removal. 1262 */ 1263 if (test_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL)) { 1264 drv_tdls_cancel_channel_switch(local, sdata, &sta->sta); 1265 clear_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL); 1266 } 1267 1268 list_del_rcu(&sta->list); 1269 sta->removed = true; 1270 1271 if (sta->uploaded) 1272 drv_sta_pre_rcu_remove(local, sta->sdata, sta); 1273 1274 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN && 1275 rcu_access_pointer(sdata->u.vlan.sta) == sta) 1276 RCU_INIT_POINTER(sdata->u.vlan.sta, NULL); 1277 1278 return 0; 1279 } 1280 1281 static int _sta_info_move_state(struct sta_info *sta, 1282 enum ieee80211_sta_state new_state, 1283 bool recalc) 1284 { 1285 might_sleep(); 1286 1287 if (sta->sta_state == new_state) 1288 return 0; 1289 1290 /* check allowed transitions first */ 1291 1292 switch (new_state) { 1293 case IEEE80211_STA_NONE: 1294 if (sta->sta_state != IEEE80211_STA_AUTH) 1295 return -EINVAL; 1296 break; 1297 case IEEE80211_STA_AUTH: 1298 if (sta->sta_state != IEEE80211_STA_NONE && 1299 sta->sta_state != IEEE80211_STA_ASSOC) 1300 return -EINVAL; 1301 break; 1302 case IEEE80211_STA_ASSOC: 1303 if (sta->sta_state != IEEE80211_STA_AUTH && 1304 sta->sta_state != IEEE80211_STA_AUTHORIZED) 1305 return -EINVAL; 1306 break; 1307 case IEEE80211_STA_AUTHORIZED: 1308 if (sta->sta_state != IEEE80211_STA_ASSOC) 1309 return -EINVAL; 1310 break; 1311 default: 1312 WARN(1, "invalid state %d", new_state); 1313 return -EINVAL; 1314 } 1315 1316 sta_dbg(sta->sdata, "moving STA %pM to state %d\n", 1317 sta->sta.addr, new_state); 1318 1319 /* notify the driver before the actual changes so it can 1320 * fail the transition 1321 */ 1322 if (test_sta_flag(sta, WLAN_STA_INSERTED)) { 1323 int err = drv_sta_state(sta->local, sta->sdata, sta, 1324 sta->sta_state, new_state); 1325 if (err) 1326 return err; 1327 } 1328 1329 /* reflect the change in all state variables */ 1330 1331 switch (new_state) { 1332 case IEEE80211_STA_NONE: 1333 if (sta->sta_state == IEEE80211_STA_AUTH) 1334 clear_bit(WLAN_STA_AUTH, &sta->_flags); 1335 break; 1336 case IEEE80211_STA_AUTH: 1337 if (sta->sta_state == IEEE80211_STA_NONE) { 1338 set_bit(WLAN_STA_AUTH, &sta->_flags); 1339 } else if (sta->sta_state == IEEE80211_STA_ASSOC) { 1340 clear_bit(WLAN_STA_ASSOC, &sta->_flags); 1341 if (recalc) { 1342 ieee80211_recalc_min_chandef(sta->sdata, -1); 1343 if (!sta->sta.support_p2p_ps) 1344 ieee80211_recalc_p2p_go_ps_allowed(sta->sdata); 1345 } 1346 } 1347 break; 1348 case IEEE80211_STA_ASSOC: 1349 if (sta->sta_state == IEEE80211_STA_AUTH) { 1350 set_bit(WLAN_STA_ASSOC, &sta->_flags); 1351 sta->assoc_at = ktime_get_boottime_ns(); 1352 if (recalc) { 1353 ieee80211_recalc_min_chandef(sta->sdata, -1); 1354 if (!sta->sta.support_p2p_ps) 1355 ieee80211_recalc_p2p_go_ps_allowed(sta->sdata); 1356 } 1357 } else if (sta->sta_state == IEEE80211_STA_AUTHORIZED) { 1358 ieee80211_vif_dec_num_mcast(sta->sdata); 1359 clear_bit(WLAN_STA_AUTHORIZED, &sta->_flags); 1360 ieee80211_clear_fast_xmit(sta); 1361 ieee80211_clear_fast_rx(sta); 1362 } 1363 break; 1364 case IEEE80211_STA_AUTHORIZED: 1365 if (sta->sta_state == IEEE80211_STA_ASSOC) { 1366 ieee80211_vif_inc_num_mcast(sta->sdata); 1367 set_bit(WLAN_STA_AUTHORIZED, &sta->_flags); 1368 ieee80211_check_fast_xmit(sta); 1369 ieee80211_check_fast_rx(sta); 1370 } 1371 if (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN || 1372 sta->sdata->vif.type == NL80211_IFTYPE_AP) 1373 cfg80211_send_layer2_update(sta->sdata->dev, 1374 sta->sta.addr); 1375 break; 1376 default: 1377 break; 1378 } 1379 1380 sta->sta_state = new_state; 1381 1382 return 0; 1383 } 1384 1385 int sta_info_move_state(struct sta_info *sta, 1386 enum ieee80211_sta_state new_state) 1387 { 1388 return _sta_info_move_state(sta, new_state, true); 1389 } 1390 1391 static void __sta_info_destroy_part2(struct sta_info *sta, bool recalc) 1392 { 1393 struct ieee80211_local *local = sta->local; 1394 struct ieee80211_sub_if_data *sdata = sta->sdata; 1395 struct station_info *sinfo; 1396 int ret; 1397 1398 /* 1399 * NOTE: This assumes at least synchronize_net() was done 1400 * after _part1 and before _part2! 1401 */ 1402 1403 might_sleep(); 1404 lockdep_assert_held(&local->sta_mtx); 1405 1406 if (sta->sta_state == IEEE80211_STA_AUTHORIZED) { 1407 ret = _sta_info_move_state(sta, IEEE80211_STA_ASSOC, recalc); 1408 WARN_ON_ONCE(ret); 1409 } 1410 1411 /* Flush queues before removing keys, as that might remove them 1412 * from hardware, and then depending on the offload method, any 1413 * frames sitting on hardware queues might be sent out without 1414 * any encryption at all. 1415 */ 1416 if (local->ops->set_key) { 1417 if (local->ops->flush_sta) 1418 drv_flush_sta(local, sta->sdata, sta); 1419 else 1420 ieee80211_flush_queues(local, sta->sdata, false); 1421 } 1422 1423 /* now keys can no longer be reached */ 1424 ieee80211_free_sta_keys(local, sta); 1425 1426 /* disable TIM bit - last chance to tell driver */ 1427 __sta_info_recalc_tim(sta, true); 1428 1429 sta->dead = true; 1430 1431 local->num_sta--; 1432 local->sta_generation++; 1433 1434 while (sta->sta_state > IEEE80211_STA_NONE) { 1435 ret = _sta_info_move_state(sta, sta->sta_state - 1, recalc); 1436 if (ret) { 1437 WARN_ON_ONCE(1); 1438 break; 1439 } 1440 } 1441 1442 if (sta->uploaded) { 1443 ret = drv_sta_state(local, sdata, sta, IEEE80211_STA_NONE, 1444 IEEE80211_STA_NOTEXIST); 1445 WARN_ON_ONCE(ret != 0); 1446 } 1447 1448 sta_dbg(sdata, "Removed STA %pM\n", sta->sta.addr); 1449 1450 sinfo = kzalloc(sizeof(*sinfo), GFP_KERNEL); 1451 if (sinfo) 1452 sta_set_sinfo(sta, sinfo, true); 1453 cfg80211_del_sta_sinfo(sdata->dev, sta->sta.addr, sinfo, GFP_KERNEL); 1454 kfree(sinfo); 1455 1456 ieee80211_sta_debugfs_remove(sta); 1457 1458 ieee80211_destroy_frag_cache(&sta->frags); 1459 1460 cleanup_single_sta(sta); 1461 } 1462 1463 int __must_check __sta_info_destroy(struct sta_info *sta) 1464 { 1465 int err = __sta_info_destroy_part1(sta); 1466 1467 if (err) 1468 return err; 1469 1470 synchronize_net(); 1471 1472 __sta_info_destroy_part2(sta, true); 1473 1474 return 0; 1475 } 1476 1477 int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, const u8 *addr) 1478 { 1479 struct sta_info *sta; 1480 int ret; 1481 1482 mutex_lock(&sdata->local->sta_mtx); 1483 sta = sta_info_get(sdata, addr); 1484 ret = __sta_info_destroy(sta); 1485 mutex_unlock(&sdata->local->sta_mtx); 1486 1487 return ret; 1488 } 1489 1490 int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata, 1491 const u8 *addr) 1492 { 1493 struct sta_info *sta; 1494 int ret; 1495 1496 mutex_lock(&sdata->local->sta_mtx); 1497 sta = sta_info_get_bss(sdata, addr); 1498 ret = __sta_info_destroy(sta); 1499 mutex_unlock(&sdata->local->sta_mtx); 1500 1501 return ret; 1502 } 1503 1504 static void sta_info_cleanup(struct timer_list *t) 1505 { 1506 struct ieee80211_local *local = from_timer(local, t, sta_cleanup); 1507 struct sta_info *sta; 1508 bool timer_needed = false; 1509 1510 rcu_read_lock(); 1511 list_for_each_entry_rcu(sta, &local->sta_list, list) 1512 if (sta_info_cleanup_expire_buffered(local, sta)) 1513 timer_needed = true; 1514 rcu_read_unlock(); 1515 1516 if (local->quiescing) 1517 return; 1518 1519 if (!timer_needed) 1520 return; 1521 1522 mod_timer(&local->sta_cleanup, 1523 round_jiffies(jiffies + STA_INFO_CLEANUP_INTERVAL)); 1524 } 1525 1526 int sta_info_init(struct ieee80211_local *local) 1527 { 1528 int err; 1529 1530 err = rhltable_init(&local->sta_hash, &sta_rht_params); 1531 if (err) 1532 return err; 1533 1534 err = rhltable_init(&local->link_sta_hash, &link_sta_rht_params); 1535 if (err) { 1536 rhltable_destroy(&local->sta_hash); 1537 return err; 1538 } 1539 1540 spin_lock_init(&local->tim_lock); 1541 mutex_init(&local->sta_mtx); 1542 INIT_LIST_HEAD(&local->sta_list); 1543 1544 timer_setup(&local->sta_cleanup, sta_info_cleanup, 0); 1545 return 0; 1546 } 1547 1548 void sta_info_stop(struct ieee80211_local *local) 1549 { 1550 del_timer_sync(&local->sta_cleanup); 1551 rhltable_destroy(&local->sta_hash); 1552 rhltable_destroy(&local->link_sta_hash); 1553 } 1554 1555 1556 int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans) 1557 { 1558 struct ieee80211_local *local = sdata->local; 1559 struct sta_info *sta, *tmp; 1560 LIST_HEAD(free_list); 1561 int ret = 0; 1562 1563 might_sleep(); 1564 1565 WARN_ON(vlans && sdata->vif.type != NL80211_IFTYPE_AP); 1566 WARN_ON(vlans && !sdata->bss); 1567 1568 mutex_lock(&local->sta_mtx); 1569 list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { 1570 if (sdata == sta->sdata || 1571 (vlans && sdata->bss == sta->sdata->bss)) { 1572 if (!WARN_ON(__sta_info_destroy_part1(sta))) 1573 list_add(&sta->free_list, &free_list); 1574 ret++; 1575 } 1576 } 1577 1578 if (!list_empty(&free_list)) { 1579 bool support_p2p_ps = true; 1580 1581 synchronize_net(); 1582 list_for_each_entry_safe(sta, tmp, &free_list, free_list) { 1583 if (!sta->sta.support_p2p_ps) 1584 support_p2p_ps = false; 1585 __sta_info_destroy_part2(sta, false); 1586 } 1587 1588 ieee80211_recalc_min_chandef(sdata, -1); 1589 if (!support_p2p_ps) 1590 ieee80211_recalc_p2p_go_ps_allowed(sdata); 1591 } 1592 mutex_unlock(&local->sta_mtx); 1593 1594 return ret; 1595 } 1596 1597 void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, 1598 unsigned long exp_time) 1599 { 1600 struct ieee80211_local *local = sdata->local; 1601 struct sta_info *sta, *tmp; 1602 1603 mutex_lock(&local->sta_mtx); 1604 1605 list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { 1606 unsigned long last_active = ieee80211_sta_last_active(sta); 1607 1608 if (sdata != sta->sdata) 1609 continue; 1610 1611 if (time_is_before_jiffies(last_active + exp_time)) { 1612 sta_dbg(sta->sdata, "expiring inactive STA %pM\n", 1613 sta->sta.addr); 1614 1615 if (ieee80211_vif_is_mesh(&sdata->vif) && 1616 test_sta_flag(sta, WLAN_STA_PS_STA)) 1617 atomic_dec(&sdata->u.mesh.ps.num_sta_ps); 1618 1619 WARN_ON(__sta_info_destroy(sta)); 1620 } 1621 } 1622 1623 mutex_unlock(&local->sta_mtx); 1624 } 1625 1626 struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw, 1627 const u8 *addr, 1628 const u8 *localaddr) 1629 { 1630 struct ieee80211_local *local = hw_to_local(hw); 1631 struct rhlist_head *tmp; 1632 struct sta_info *sta; 1633 1634 /* 1635 * Just return a random station if localaddr is NULL 1636 * ... first in list. 1637 */ 1638 for_each_sta_info(local, addr, sta, tmp) { 1639 if (localaddr && 1640 !ether_addr_equal(sta->sdata->vif.addr, localaddr)) 1641 continue; 1642 if (!sta->uploaded) 1643 return NULL; 1644 return &sta->sta; 1645 } 1646 1647 return NULL; 1648 } 1649 EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_ifaddr); 1650 1651 struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif, 1652 const u8 *addr) 1653 { 1654 struct sta_info *sta; 1655 1656 if (!vif) 1657 return NULL; 1658 1659 sta = sta_info_get_bss(vif_to_sdata(vif), addr); 1660 if (!sta) 1661 return NULL; 1662 1663 if (!sta->uploaded) 1664 return NULL; 1665 1666 return &sta->sta; 1667 } 1668 EXPORT_SYMBOL(ieee80211_find_sta); 1669 1670 /* powersave support code */ 1671 void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta) 1672 { 1673 struct ieee80211_sub_if_data *sdata = sta->sdata; 1674 struct ieee80211_local *local = sdata->local; 1675 struct sk_buff_head pending; 1676 int filtered = 0, buffered = 0, ac, i; 1677 unsigned long flags; 1678 struct ps_data *ps; 1679 1680 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 1681 sdata = container_of(sdata->bss, struct ieee80211_sub_if_data, 1682 u.ap); 1683 1684 if (sdata->vif.type == NL80211_IFTYPE_AP) 1685 ps = &sdata->bss->ps; 1686 else if (ieee80211_vif_is_mesh(&sdata->vif)) 1687 ps = &sdata->u.mesh.ps; 1688 else 1689 return; 1690 1691 clear_sta_flag(sta, WLAN_STA_SP); 1692 1693 BUILD_BUG_ON(BITS_TO_LONGS(IEEE80211_NUM_TIDS) > 1); 1694 sta->driver_buffered_tids = 0; 1695 sta->txq_buffered_tids = 0; 1696 1697 if (!ieee80211_hw_check(&local->hw, AP_LINK_PS)) 1698 drv_sta_notify(local, sdata, STA_NOTIFY_AWAKE, &sta->sta); 1699 1700 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) { 1701 if (!sta->sta.txq[i] || !txq_has_queue(sta->sta.txq[i])) 1702 continue; 1703 1704 schedule_and_wake_txq(local, to_txq_info(sta->sta.txq[i])); 1705 } 1706 1707 skb_queue_head_init(&pending); 1708 1709 /* sync with ieee80211_tx_h_unicast_ps_buf */ 1710 spin_lock(&sta->ps_lock); 1711 /* Send all buffered frames to the station */ 1712 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1713 int count = skb_queue_len(&pending), tmp; 1714 1715 spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags); 1716 skb_queue_splice_tail_init(&sta->tx_filtered[ac], &pending); 1717 spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags); 1718 tmp = skb_queue_len(&pending); 1719 filtered += tmp - count; 1720 count = tmp; 1721 1722 spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags); 1723 skb_queue_splice_tail_init(&sta->ps_tx_buf[ac], &pending); 1724 spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags); 1725 tmp = skb_queue_len(&pending); 1726 buffered += tmp - count; 1727 } 1728 1729 ieee80211_add_pending_skbs(local, &pending); 1730 1731 /* now we're no longer in the deliver code */ 1732 clear_sta_flag(sta, WLAN_STA_PS_DELIVER); 1733 1734 /* The station might have polled and then woken up before we responded, 1735 * so clear these flags now to avoid them sticking around. 1736 */ 1737 clear_sta_flag(sta, WLAN_STA_PSPOLL); 1738 clear_sta_flag(sta, WLAN_STA_UAPSD); 1739 spin_unlock(&sta->ps_lock); 1740 1741 atomic_dec(&ps->num_sta_ps); 1742 1743 local->total_ps_buffered -= buffered; 1744 1745 sta_info_recalc_tim(sta); 1746 1747 ps_dbg(sdata, 1748 "STA %pM aid %d sending %d filtered/%d PS frames since STA woke up\n", 1749 sta->sta.addr, sta->sta.aid, filtered, buffered); 1750 1751 ieee80211_check_fast_xmit(sta); 1752 } 1753 1754 static void ieee80211_send_null_response(struct sta_info *sta, int tid, 1755 enum ieee80211_frame_release_type reason, 1756 bool call_driver, bool more_data) 1757 { 1758 struct ieee80211_sub_if_data *sdata = sta->sdata; 1759 struct ieee80211_local *local = sdata->local; 1760 struct ieee80211_qos_hdr *nullfunc; 1761 struct sk_buff *skb; 1762 int size = sizeof(*nullfunc); 1763 __le16 fc; 1764 bool qos = sta->sta.wme; 1765 struct ieee80211_tx_info *info; 1766 struct ieee80211_chanctx_conf *chanctx_conf; 1767 1768 if (qos) { 1769 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | 1770 IEEE80211_STYPE_QOS_NULLFUNC | 1771 IEEE80211_FCTL_FROMDS); 1772 } else { 1773 size -= 2; 1774 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | 1775 IEEE80211_STYPE_NULLFUNC | 1776 IEEE80211_FCTL_FROMDS); 1777 } 1778 1779 skb = dev_alloc_skb(local->hw.extra_tx_headroom + size); 1780 if (!skb) 1781 return; 1782 1783 skb_reserve(skb, local->hw.extra_tx_headroom); 1784 1785 nullfunc = skb_put(skb, size); 1786 nullfunc->frame_control = fc; 1787 nullfunc->duration_id = 0; 1788 memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN); 1789 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 1790 memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN); 1791 nullfunc->seq_ctrl = 0; 1792 1793 skb->priority = tid; 1794 skb_set_queue_mapping(skb, ieee802_1d_to_ac[tid]); 1795 if (qos) { 1796 nullfunc->qos_ctrl = cpu_to_le16(tid); 1797 1798 if (reason == IEEE80211_FRAME_RELEASE_UAPSD) { 1799 nullfunc->qos_ctrl |= 1800 cpu_to_le16(IEEE80211_QOS_CTL_EOSP); 1801 if (more_data) 1802 nullfunc->frame_control |= 1803 cpu_to_le16(IEEE80211_FCTL_MOREDATA); 1804 } 1805 } 1806 1807 info = IEEE80211_SKB_CB(skb); 1808 1809 /* 1810 * Tell TX path to send this frame even though the 1811 * STA may still remain is PS mode after this frame 1812 * exchange. Also set EOSP to indicate this packet 1813 * ends the poll/service period. 1814 */ 1815 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER | 1816 IEEE80211_TX_STATUS_EOSP | 1817 IEEE80211_TX_CTL_REQ_TX_STATUS; 1818 1819 info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE; 1820 1821 if (call_driver) 1822 drv_allow_buffered_frames(local, sta, BIT(tid), 1, 1823 reason, false); 1824 1825 skb->dev = sdata->dev; 1826 1827 rcu_read_lock(); 1828 chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf); 1829 if (WARN_ON(!chanctx_conf)) { 1830 rcu_read_unlock(); 1831 kfree_skb(skb); 1832 return; 1833 } 1834 1835 info->band = chanctx_conf->def.chan->band; 1836 ieee80211_xmit(sdata, sta, skb); 1837 rcu_read_unlock(); 1838 } 1839 1840 static int find_highest_prio_tid(unsigned long tids) 1841 { 1842 /* lower 3 TIDs aren't ordered perfectly */ 1843 if (tids & 0xF8) 1844 return fls(tids) - 1; 1845 /* TID 0 is BE just like TID 3 */ 1846 if (tids & BIT(0)) 1847 return 0; 1848 return fls(tids) - 1; 1849 } 1850 1851 /* Indicates if the MORE_DATA bit should be set in the last 1852 * frame obtained by ieee80211_sta_ps_get_frames. 1853 * Note that driver_release_tids is relevant only if 1854 * reason = IEEE80211_FRAME_RELEASE_PSPOLL 1855 */ 1856 static bool 1857 ieee80211_sta_ps_more_data(struct sta_info *sta, u8 ignored_acs, 1858 enum ieee80211_frame_release_type reason, 1859 unsigned long driver_release_tids) 1860 { 1861 int ac; 1862 1863 /* If the driver has data on more than one TID then 1864 * certainly there's more data if we release just a 1865 * single frame now (from a single TID). This will 1866 * only happen for PS-Poll. 1867 */ 1868 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL && 1869 hweight16(driver_release_tids) > 1) 1870 return true; 1871 1872 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1873 if (ignored_acs & ieee80211_ac_to_qos_mask[ac]) 1874 continue; 1875 1876 if (!skb_queue_empty(&sta->tx_filtered[ac]) || 1877 !skb_queue_empty(&sta->ps_tx_buf[ac])) 1878 return true; 1879 } 1880 1881 return false; 1882 } 1883 1884 static void 1885 ieee80211_sta_ps_get_frames(struct sta_info *sta, int n_frames, u8 ignored_acs, 1886 enum ieee80211_frame_release_type reason, 1887 struct sk_buff_head *frames, 1888 unsigned long *driver_release_tids) 1889 { 1890 struct ieee80211_sub_if_data *sdata = sta->sdata; 1891 struct ieee80211_local *local = sdata->local; 1892 int ac; 1893 1894 /* Get response frame(s) and more data bit for the last one. */ 1895 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1896 unsigned long tids; 1897 1898 if (ignored_acs & ieee80211_ac_to_qos_mask[ac]) 1899 continue; 1900 1901 tids = ieee80211_tids_for_ac(ac); 1902 1903 /* if we already have frames from software, then we can't also 1904 * release from hardware queues 1905 */ 1906 if (skb_queue_empty(frames)) { 1907 *driver_release_tids |= 1908 sta->driver_buffered_tids & tids; 1909 *driver_release_tids |= sta->txq_buffered_tids & tids; 1910 } 1911 1912 if (!*driver_release_tids) { 1913 struct sk_buff *skb; 1914 1915 while (n_frames > 0) { 1916 skb = skb_dequeue(&sta->tx_filtered[ac]); 1917 if (!skb) { 1918 skb = skb_dequeue( 1919 &sta->ps_tx_buf[ac]); 1920 if (skb) 1921 local->total_ps_buffered--; 1922 } 1923 if (!skb) 1924 break; 1925 n_frames--; 1926 __skb_queue_tail(frames, skb); 1927 } 1928 } 1929 1930 /* If we have more frames buffered on this AC, then abort the 1931 * loop since we can't send more data from other ACs before 1932 * the buffered frames from this. 1933 */ 1934 if (!skb_queue_empty(&sta->tx_filtered[ac]) || 1935 !skb_queue_empty(&sta->ps_tx_buf[ac])) 1936 break; 1937 } 1938 } 1939 1940 static void 1941 ieee80211_sta_ps_deliver_response(struct sta_info *sta, 1942 int n_frames, u8 ignored_acs, 1943 enum ieee80211_frame_release_type reason) 1944 { 1945 struct ieee80211_sub_if_data *sdata = sta->sdata; 1946 struct ieee80211_local *local = sdata->local; 1947 unsigned long driver_release_tids = 0; 1948 struct sk_buff_head frames; 1949 bool more_data; 1950 1951 /* Service or PS-Poll period starts */ 1952 set_sta_flag(sta, WLAN_STA_SP); 1953 1954 __skb_queue_head_init(&frames); 1955 1956 ieee80211_sta_ps_get_frames(sta, n_frames, ignored_acs, reason, 1957 &frames, &driver_release_tids); 1958 1959 more_data = ieee80211_sta_ps_more_data(sta, ignored_acs, reason, driver_release_tids); 1960 1961 if (driver_release_tids && reason == IEEE80211_FRAME_RELEASE_PSPOLL) 1962 driver_release_tids = 1963 BIT(find_highest_prio_tid(driver_release_tids)); 1964 1965 if (skb_queue_empty(&frames) && !driver_release_tids) { 1966 int tid, ac; 1967 1968 /* 1969 * For PS-Poll, this can only happen due to a race condition 1970 * when we set the TIM bit and the station notices it, but 1971 * before it can poll for the frame we expire it. 1972 * 1973 * For uAPSD, this is said in the standard (11.2.1.5 h): 1974 * At each unscheduled SP for a non-AP STA, the AP shall 1975 * attempt to transmit at least one MSDU or MMPDU, but no 1976 * more than the value specified in the Max SP Length field 1977 * in the QoS Capability element from delivery-enabled ACs, 1978 * that are destined for the non-AP STA. 1979 * 1980 * Since we have no other MSDU/MMPDU, transmit a QoS null frame. 1981 */ 1982 1983 /* This will evaluate to 1, 3, 5 or 7. */ 1984 for (ac = IEEE80211_AC_VO; ac < IEEE80211_NUM_ACS; ac++) 1985 if (!(ignored_acs & ieee80211_ac_to_qos_mask[ac])) 1986 break; 1987 tid = 7 - 2 * ac; 1988 1989 ieee80211_send_null_response(sta, tid, reason, true, false); 1990 } else if (!driver_release_tids) { 1991 struct sk_buff_head pending; 1992 struct sk_buff *skb; 1993 int num = 0; 1994 u16 tids = 0; 1995 bool need_null = false; 1996 1997 skb_queue_head_init(&pending); 1998 1999 while ((skb = __skb_dequeue(&frames))) { 2000 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 2001 struct ieee80211_hdr *hdr = (void *) skb->data; 2002 u8 *qoshdr = NULL; 2003 2004 num++; 2005 2006 /* 2007 * Tell TX path to send this frame even though the 2008 * STA may still remain is PS mode after this frame 2009 * exchange. 2010 */ 2011 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER; 2012 info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE; 2013 2014 /* 2015 * Use MoreData flag to indicate whether there are 2016 * more buffered frames for this STA 2017 */ 2018 if (more_data || !skb_queue_empty(&frames)) 2019 hdr->frame_control |= 2020 cpu_to_le16(IEEE80211_FCTL_MOREDATA); 2021 else 2022 hdr->frame_control &= 2023 cpu_to_le16(~IEEE80211_FCTL_MOREDATA); 2024 2025 if (ieee80211_is_data_qos(hdr->frame_control) || 2026 ieee80211_is_qos_nullfunc(hdr->frame_control)) 2027 qoshdr = ieee80211_get_qos_ctl(hdr); 2028 2029 tids |= BIT(skb->priority); 2030 2031 __skb_queue_tail(&pending, skb); 2032 2033 /* end service period after last frame or add one */ 2034 if (!skb_queue_empty(&frames)) 2035 continue; 2036 2037 if (reason != IEEE80211_FRAME_RELEASE_UAPSD) { 2038 /* for PS-Poll, there's only one frame */ 2039 info->flags |= IEEE80211_TX_STATUS_EOSP | 2040 IEEE80211_TX_CTL_REQ_TX_STATUS; 2041 break; 2042 } 2043 2044 /* For uAPSD, things are a bit more complicated. If the 2045 * last frame has a QoS header (i.e. is a QoS-data or 2046 * QoS-nulldata frame) then just set the EOSP bit there 2047 * and be done. 2048 * If the frame doesn't have a QoS header (which means 2049 * it should be a bufferable MMPDU) then we can't set 2050 * the EOSP bit in the QoS header; add a QoS-nulldata 2051 * frame to the list to send it after the MMPDU. 2052 * 2053 * Note that this code is only in the mac80211-release 2054 * code path, we assume that the driver will not buffer 2055 * anything but QoS-data frames, or if it does, will 2056 * create the QoS-nulldata frame by itself if needed. 2057 * 2058 * Cf. 802.11-2012 10.2.1.10 (c). 2059 */ 2060 if (qoshdr) { 2061 *qoshdr |= IEEE80211_QOS_CTL_EOSP; 2062 2063 info->flags |= IEEE80211_TX_STATUS_EOSP | 2064 IEEE80211_TX_CTL_REQ_TX_STATUS; 2065 } else { 2066 /* The standard isn't completely clear on this 2067 * as it says the more-data bit should be set 2068 * if there are more BUs. The QoS-Null frame 2069 * we're about to send isn't buffered yet, we 2070 * only create it below, but let's pretend it 2071 * was buffered just in case some clients only 2072 * expect more-data=0 when eosp=1. 2073 */ 2074 hdr->frame_control |= 2075 cpu_to_le16(IEEE80211_FCTL_MOREDATA); 2076 need_null = true; 2077 num++; 2078 } 2079 break; 2080 } 2081 2082 drv_allow_buffered_frames(local, sta, tids, num, 2083 reason, more_data); 2084 2085 ieee80211_add_pending_skbs(local, &pending); 2086 2087 if (need_null) 2088 ieee80211_send_null_response( 2089 sta, find_highest_prio_tid(tids), 2090 reason, false, false); 2091 2092 sta_info_recalc_tim(sta); 2093 } else { 2094 int tid; 2095 2096 /* 2097 * We need to release a frame that is buffered somewhere in the 2098 * driver ... it'll have to handle that. 2099 * Note that the driver also has to check the number of frames 2100 * on the TIDs we're releasing from - if there are more than 2101 * n_frames it has to set the more-data bit (if we didn't ask 2102 * it to set it anyway due to other buffered frames); if there 2103 * are fewer than n_frames it has to make sure to adjust that 2104 * to allow the service period to end properly. 2105 */ 2106 drv_release_buffered_frames(local, sta, driver_release_tids, 2107 n_frames, reason, more_data); 2108 2109 /* 2110 * Note that we don't recalculate the TIM bit here as it would 2111 * most likely have no effect at all unless the driver told us 2112 * that the TID(s) became empty before returning here from the 2113 * release function. 2114 * Either way, however, when the driver tells us that the TID(s) 2115 * became empty or we find that a txq became empty, we'll do the 2116 * TIM recalculation. 2117 */ 2118 2119 for (tid = 0; tid < ARRAY_SIZE(sta->sta.txq); tid++) { 2120 if (!sta->sta.txq[tid] || 2121 !(driver_release_tids & BIT(tid)) || 2122 txq_has_queue(sta->sta.txq[tid])) 2123 continue; 2124 2125 sta_info_recalc_tim(sta); 2126 break; 2127 } 2128 } 2129 } 2130 2131 void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta) 2132 { 2133 u8 ignore_for_response = sta->sta.uapsd_queues; 2134 2135 /* 2136 * If all ACs are delivery-enabled then we should reply 2137 * from any of them, if only some are enabled we reply 2138 * only from the non-enabled ones. 2139 */ 2140 if (ignore_for_response == BIT(IEEE80211_NUM_ACS) - 1) 2141 ignore_for_response = 0; 2142 2143 ieee80211_sta_ps_deliver_response(sta, 1, ignore_for_response, 2144 IEEE80211_FRAME_RELEASE_PSPOLL); 2145 } 2146 2147 void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta) 2148 { 2149 int n_frames = sta->sta.max_sp; 2150 u8 delivery_enabled = sta->sta.uapsd_queues; 2151 2152 /* 2153 * If we ever grow support for TSPEC this might happen if 2154 * the TSPEC update from hostapd comes in between a trigger 2155 * frame setting WLAN_STA_UAPSD in the RX path and this 2156 * actually getting called. 2157 */ 2158 if (!delivery_enabled) 2159 return; 2160 2161 switch (sta->sta.max_sp) { 2162 case 1: 2163 n_frames = 2; 2164 break; 2165 case 2: 2166 n_frames = 4; 2167 break; 2168 case 3: 2169 n_frames = 6; 2170 break; 2171 case 0: 2172 /* XXX: what is a good value? */ 2173 n_frames = 128; 2174 break; 2175 } 2176 2177 ieee80211_sta_ps_deliver_response(sta, n_frames, ~delivery_enabled, 2178 IEEE80211_FRAME_RELEASE_UAPSD); 2179 } 2180 2181 void ieee80211_sta_block_awake(struct ieee80211_hw *hw, 2182 struct ieee80211_sta *pubsta, bool block) 2183 { 2184 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 2185 2186 trace_api_sta_block_awake(sta->local, pubsta, block); 2187 2188 if (block) { 2189 set_sta_flag(sta, WLAN_STA_PS_DRIVER); 2190 ieee80211_clear_fast_xmit(sta); 2191 return; 2192 } 2193 2194 if (!test_sta_flag(sta, WLAN_STA_PS_DRIVER)) 2195 return; 2196 2197 if (!test_sta_flag(sta, WLAN_STA_PS_STA)) { 2198 set_sta_flag(sta, WLAN_STA_PS_DELIVER); 2199 clear_sta_flag(sta, WLAN_STA_PS_DRIVER); 2200 ieee80211_queue_work(hw, &sta->drv_deliver_wk); 2201 } else if (test_sta_flag(sta, WLAN_STA_PSPOLL) || 2202 test_sta_flag(sta, WLAN_STA_UAPSD)) { 2203 /* must be asleep in this case */ 2204 clear_sta_flag(sta, WLAN_STA_PS_DRIVER); 2205 ieee80211_queue_work(hw, &sta->drv_deliver_wk); 2206 } else { 2207 clear_sta_flag(sta, WLAN_STA_PS_DRIVER); 2208 ieee80211_check_fast_xmit(sta); 2209 } 2210 } 2211 EXPORT_SYMBOL(ieee80211_sta_block_awake); 2212 2213 void ieee80211_sta_eosp(struct ieee80211_sta *pubsta) 2214 { 2215 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 2216 struct ieee80211_local *local = sta->local; 2217 2218 trace_api_eosp(local, pubsta); 2219 2220 clear_sta_flag(sta, WLAN_STA_SP); 2221 } 2222 EXPORT_SYMBOL(ieee80211_sta_eosp); 2223 2224 void ieee80211_send_eosp_nullfunc(struct ieee80211_sta *pubsta, int tid) 2225 { 2226 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 2227 enum ieee80211_frame_release_type reason; 2228 bool more_data; 2229 2230 trace_api_send_eosp_nullfunc(sta->local, pubsta, tid); 2231 2232 reason = IEEE80211_FRAME_RELEASE_UAPSD; 2233 more_data = ieee80211_sta_ps_more_data(sta, ~sta->sta.uapsd_queues, 2234 reason, 0); 2235 2236 ieee80211_send_null_response(sta, tid, reason, false, more_data); 2237 } 2238 EXPORT_SYMBOL(ieee80211_send_eosp_nullfunc); 2239 2240 void ieee80211_sta_set_buffered(struct ieee80211_sta *pubsta, 2241 u8 tid, bool buffered) 2242 { 2243 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 2244 2245 if (WARN_ON(tid >= IEEE80211_NUM_TIDS)) 2246 return; 2247 2248 trace_api_sta_set_buffered(sta->local, pubsta, tid, buffered); 2249 2250 if (buffered) 2251 set_bit(tid, &sta->driver_buffered_tids); 2252 else 2253 clear_bit(tid, &sta->driver_buffered_tids); 2254 2255 sta_info_recalc_tim(sta); 2256 } 2257 EXPORT_SYMBOL(ieee80211_sta_set_buffered); 2258 2259 void ieee80211_sta_register_airtime(struct ieee80211_sta *pubsta, u8 tid, 2260 u32 tx_airtime, u32 rx_airtime) 2261 { 2262 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 2263 struct ieee80211_local *local = sta->sdata->local; 2264 u8 ac = ieee80211_ac_from_tid(tid); 2265 u32 airtime = 0; 2266 u32 diff; 2267 2268 if (sta->local->airtime_flags & AIRTIME_USE_TX) 2269 airtime += tx_airtime; 2270 if (sta->local->airtime_flags & AIRTIME_USE_RX) 2271 airtime += rx_airtime; 2272 2273 spin_lock_bh(&local->active_txq_lock[ac]); 2274 sta->airtime[ac].tx_airtime += tx_airtime; 2275 sta->airtime[ac].rx_airtime += rx_airtime; 2276 2277 diff = (u32)jiffies - sta->airtime[ac].last_active; 2278 if (diff <= AIRTIME_ACTIVE_DURATION) 2279 sta->airtime[ac].deficit -= airtime; 2280 2281 spin_unlock_bh(&local->active_txq_lock[ac]); 2282 } 2283 EXPORT_SYMBOL(ieee80211_sta_register_airtime); 2284 2285 void __ieee80211_sta_recalc_aggregates(struct sta_info *sta, u16 active_links) 2286 { 2287 bool first = true; 2288 int link_id; 2289 2290 if (!sta->sta.valid_links || !sta->sta.mlo) { 2291 sta->sta.cur = &sta->sta.deflink.agg; 2292 return; 2293 } 2294 2295 rcu_read_lock(); 2296 for (link_id = 0; link_id < ARRAY_SIZE((sta)->link); link_id++) { 2297 struct ieee80211_link_sta *link_sta; 2298 int i; 2299 2300 if (!(active_links & BIT(link_id))) 2301 continue; 2302 2303 link_sta = rcu_dereference(sta->sta.link[link_id]); 2304 if (!link_sta) 2305 continue; 2306 2307 if (first) { 2308 sta->cur = sta->sta.deflink.agg; 2309 first = false; 2310 continue; 2311 } 2312 2313 sta->cur.max_amsdu_len = 2314 min(sta->cur.max_amsdu_len, 2315 link_sta->agg.max_amsdu_len); 2316 sta->cur.max_rc_amsdu_len = 2317 min(sta->cur.max_rc_amsdu_len, 2318 link_sta->agg.max_rc_amsdu_len); 2319 2320 for (i = 0; i < ARRAY_SIZE(sta->cur.max_tid_amsdu_len); i++) 2321 sta->cur.max_tid_amsdu_len[i] = 2322 min(sta->cur.max_tid_amsdu_len[i], 2323 link_sta->agg.max_tid_amsdu_len[i]); 2324 } 2325 rcu_read_unlock(); 2326 2327 sta->sta.cur = &sta->cur; 2328 } 2329 2330 void ieee80211_sta_recalc_aggregates(struct ieee80211_sta *pubsta) 2331 { 2332 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 2333 2334 __ieee80211_sta_recalc_aggregates(sta, sta->sdata->vif.active_links); 2335 } 2336 EXPORT_SYMBOL(ieee80211_sta_recalc_aggregates); 2337 2338 void ieee80211_sta_update_pending_airtime(struct ieee80211_local *local, 2339 struct sta_info *sta, u8 ac, 2340 u16 tx_airtime, bool tx_completed) 2341 { 2342 int tx_pending; 2343 2344 if (!wiphy_ext_feature_isset(local->hw.wiphy, NL80211_EXT_FEATURE_AQL)) 2345 return; 2346 2347 if (!tx_completed) { 2348 if (sta) 2349 atomic_add(tx_airtime, 2350 &sta->airtime[ac].aql_tx_pending); 2351 2352 atomic_add(tx_airtime, &local->aql_total_pending_airtime); 2353 atomic_add(tx_airtime, &local->aql_ac_pending_airtime[ac]); 2354 return; 2355 } 2356 2357 if (sta) { 2358 tx_pending = atomic_sub_return(tx_airtime, 2359 &sta->airtime[ac].aql_tx_pending); 2360 if (tx_pending < 0) 2361 atomic_cmpxchg(&sta->airtime[ac].aql_tx_pending, 2362 tx_pending, 0); 2363 } 2364 2365 atomic_sub(tx_airtime, &local->aql_total_pending_airtime); 2366 tx_pending = atomic_sub_return(tx_airtime, 2367 &local->aql_ac_pending_airtime[ac]); 2368 if (WARN_ONCE(tx_pending < 0, 2369 "Device %s AC %d pending airtime underflow: %u, %u", 2370 wiphy_name(local->hw.wiphy), ac, tx_pending, 2371 tx_airtime)) { 2372 atomic_cmpxchg(&local->aql_ac_pending_airtime[ac], 2373 tx_pending, 0); 2374 atomic_sub(tx_pending, &local->aql_total_pending_airtime); 2375 } 2376 } 2377 2378 static struct ieee80211_sta_rx_stats * 2379 sta_get_last_rx_stats(struct sta_info *sta) 2380 { 2381 struct ieee80211_sta_rx_stats *stats = &sta->deflink.rx_stats; 2382 int cpu; 2383 2384 if (!sta->deflink.pcpu_rx_stats) 2385 return stats; 2386 2387 for_each_possible_cpu(cpu) { 2388 struct ieee80211_sta_rx_stats *cpustats; 2389 2390 cpustats = per_cpu_ptr(sta->deflink.pcpu_rx_stats, cpu); 2391 2392 if (time_after(cpustats->last_rx, stats->last_rx)) 2393 stats = cpustats; 2394 } 2395 2396 return stats; 2397 } 2398 2399 static void sta_stats_decode_rate(struct ieee80211_local *local, u32 rate, 2400 struct rate_info *rinfo) 2401 { 2402 rinfo->bw = STA_STATS_GET(BW, rate); 2403 2404 switch (STA_STATS_GET(TYPE, rate)) { 2405 case STA_STATS_RATE_TYPE_VHT: 2406 rinfo->flags = RATE_INFO_FLAGS_VHT_MCS; 2407 rinfo->mcs = STA_STATS_GET(VHT_MCS, rate); 2408 rinfo->nss = STA_STATS_GET(VHT_NSS, rate); 2409 if (STA_STATS_GET(SGI, rate)) 2410 rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI; 2411 break; 2412 case STA_STATS_RATE_TYPE_HT: 2413 rinfo->flags = RATE_INFO_FLAGS_MCS; 2414 rinfo->mcs = STA_STATS_GET(HT_MCS, rate); 2415 if (STA_STATS_GET(SGI, rate)) 2416 rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI; 2417 break; 2418 case STA_STATS_RATE_TYPE_LEGACY: { 2419 struct ieee80211_supported_band *sband; 2420 u16 brate; 2421 unsigned int shift; 2422 int band = STA_STATS_GET(LEGACY_BAND, rate); 2423 int rate_idx = STA_STATS_GET(LEGACY_IDX, rate); 2424 2425 sband = local->hw.wiphy->bands[band]; 2426 2427 if (WARN_ON_ONCE(!sband->bitrates)) 2428 break; 2429 2430 brate = sband->bitrates[rate_idx].bitrate; 2431 if (rinfo->bw == RATE_INFO_BW_5) 2432 shift = 2; 2433 else if (rinfo->bw == RATE_INFO_BW_10) 2434 shift = 1; 2435 else 2436 shift = 0; 2437 rinfo->legacy = DIV_ROUND_UP(brate, 1 << shift); 2438 break; 2439 } 2440 case STA_STATS_RATE_TYPE_HE: 2441 rinfo->flags = RATE_INFO_FLAGS_HE_MCS; 2442 rinfo->mcs = STA_STATS_GET(HE_MCS, rate); 2443 rinfo->nss = STA_STATS_GET(HE_NSS, rate); 2444 rinfo->he_gi = STA_STATS_GET(HE_GI, rate); 2445 rinfo->he_ru_alloc = STA_STATS_GET(HE_RU, rate); 2446 rinfo->he_dcm = STA_STATS_GET(HE_DCM, rate); 2447 break; 2448 case STA_STATS_RATE_TYPE_EHT: 2449 rinfo->flags = RATE_INFO_FLAGS_EHT_MCS; 2450 rinfo->mcs = STA_STATS_GET(EHT_MCS, rate); 2451 rinfo->nss = STA_STATS_GET(EHT_NSS, rate); 2452 rinfo->eht_gi = STA_STATS_GET(EHT_GI, rate); 2453 rinfo->eht_ru_alloc = STA_STATS_GET(EHT_RU, rate); 2454 break; 2455 } 2456 } 2457 2458 static int sta_set_rate_info_rx(struct sta_info *sta, struct rate_info *rinfo) 2459 { 2460 u32 rate = READ_ONCE(sta_get_last_rx_stats(sta)->last_rate); 2461 2462 if (rate == STA_STATS_RATE_INVALID) 2463 return -EINVAL; 2464 2465 sta_stats_decode_rate(sta->local, rate, rinfo); 2466 return 0; 2467 } 2468 2469 static inline u64 sta_get_tidstats_msdu(struct ieee80211_sta_rx_stats *rxstats, 2470 int tid) 2471 { 2472 unsigned int start; 2473 u64 value; 2474 2475 do { 2476 start = u64_stats_fetch_begin(&rxstats->syncp); 2477 value = rxstats->msdu[tid]; 2478 } while (u64_stats_fetch_retry(&rxstats->syncp, start)); 2479 2480 return value; 2481 } 2482 2483 static void sta_set_tidstats(struct sta_info *sta, 2484 struct cfg80211_tid_stats *tidstats, 2485 int tid) 2486 { 2487 struct ieee80211_local *local = sta->local; 2488 int cpu; 2489 2490 if (!(tidstats->filled & BIT(NL80211_TID_STATS_RX_MSDU))) { 2491 tidstats->rx_msdu += sta_get_tidstats_msdu(&sta->deflink.rx_stats, 2492 tid); 2493 2494 if (sta->deflink.pcpu_rx_stats) { 2495 for_each_possible_cpu(cpu) { 2496 struct ieee80211_sta_rx_stats *cpurxs; 2497 2498 cpurxs = per_cpu_ptr(sta->deflink.pcpu_rx_stats, 2499 cpu); 2500 tidstats->rx_msdu += 2501 sta_get_tidstats_msdu(cpurxs, tid); 2502 } 2503 } 2504 2505 tidstats->filled |= BIT(NL80211_TID_STATS_RX_MSDU); 2506 } 2507 2508 if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU))) { 2509 tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU); 2510 tidstats->tx_msdu = sta->deflink.tx_stats.msdu[tid]; 2511 } 2512 2513 if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU_RETRIES)) && 2514 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 2515 tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU_RETRIES); 2516 tidstats->tx_msdu_retries = sta->deflink.status_stats.msdu_retries[tid]; 2517 } 2518 2519 if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU_FAILED)) && 2520 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 2521 tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU_FAILED); 2522 tidstats->tx_msdu_failed = sta->deflink.status_stats.msdu_failed[tid]; 2523 } 2524 2525 if (tid < IEEE80211_NUM_TIDS) { 2526 spin_lock_bh(&local->fq.lock); 2527 rcu_read_lock(); 2528 2529 tidstats->filled |= BIT(NL80211_TID_STATS_TXQ_STATS); 2530 ieee80211_fill_txq_stats(&tidstats->txq_stats, 2531 to_txq_info(sta->sta.txq[tid])); 2532 2533 rcu_read_unlock(); 2534 spin_unlock_bh(&local->fq.lock); 2535 } 2536 } 2537 2538 static inline u64 sta_get_stats_bytes(struct ieee80211_sta_rx_stats *rxstats) 2539 { 2540 unsigned int start; 2541 u64 value; 2542 2543 do { 2544 start = u64_stats_fetch_begin(&rxstats->syncp); 2545 value = rxstats->bytes; 2546 } while (u64_stats_fetch_retry(&rxstats->syncp, start)); 2547 2548 return value; 2549 } 2550 2551 void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo, 2552 bool tidstats) 2553 { 2554 struct ieee80211_sub_if_data *sdata = sta->sdata; 2555 struct ieee80211_local *local = sdata->local; 2556 u32 thr = 0; 2557 int i, ac, cpu; 2558 struct ieee80211_sta_rx_stats *last_rxstats; 2559 2560 last_rxstats = sta_get_last_rx_stats(sta); 2561 2562 sinfo->generation = sdata->local->sta_generation; 2563 2564 /* do before driver, so beacon filtering drivers have a 2565 * chance to e.g. just add the number of filtered beacons 2566 * (or just modify the value entirely, of course) 2567 */ 2568 if (sdata->vif.type == NL80211_IFTYPE_STATION) 2569 sinfo->rx_beacon = sdata->deflink.u.mgd.count_beacon_signal; 2570 2571 drv_sta_statistics(local, sdata, &sta->sta, sinfo); 2572 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_INACTIVE_TIME) | 2573 BIT_ULL(NL80211_STA_INFO_STA_FLAGS) | 2574 BIT_ULL(NL80211_STA_INFO_BSS_PARAM) | 2575 BIT_ULL(NL80211_STA_INFO_CONNECTED_TIME) | 2576 BIT_ULL(NL80211_STA_INFO_ASSOC_AT_BOOTTIME) | 2577 BIT_ULL(NL80211_STA_INFO_RX_DROP_MISC); 2578 2579 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 2580 sinfo->beacon_loss_count = 2581 sdata->deflink.u.mgd.beacon_loss_count; 2582 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_BEACON_LOSS); 2583 } 2584 2585 sinfo->connected_time = ktime_get_seconds() - sta->last_connected; 2586 sinfo->assoc_at = sta->assoc_at; 2587 sinfo->inactive_time = 2588 jiffies_to_msecs(jiffies - ieee80211_sta_last_active(sta)); 2589 2590 if (!(sinfo->filled & (BIT_ULL(NL80211_STA_INFO_TX_BYTES64) | 2591 BIT_ULL(NL80211_STA_INFO_TX_BYTES)))) { 2592 sinfo->tx_bytes = 0; 2593 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 2594 sinfo->tx_bytes += sta->deflink.tx_stats.bytes[ac]; 2595 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_BYTES64); 2596 } 2597 2598 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_PACKETS))) { 2599 sinfo->tx_packets = 0; 2600 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 2601 sinfo->tx_packets += sta->deflink.tx_stats.packets[ac]; 2602 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_PACKETS); 2603 } 2604 2605 if (!(sinfo->filled & (BIT_ULL(NL80211_STA_INFO_RX_BYTES64) | 2606 BIT_ULL(NL80211_STA_INFO_RX_BYTES)))) { 2607 sinfo->rx_bytes += sta_get_stats_bytes(&sta->deflink.rx_stats); 2608 2609 if (sta->deflink.pcpu_rx_stats) { 2610 for_each_possible_cpu(cpu) { 2611 struct ieee80211_sta_rx_stats *cpurxs; 2612 2613 cpurxs = per_cpu_ptr(sta->deflink.pcpu_rx_stats, 2614 cpu); 2615 sinfo->rx_bytes += sta_get_stats_bytes(cpurxs); 2616 } 2617 } 2618 2619 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_BYTES64); 2620 } 2621 2622 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_RX_PACKETS))) { 2623 sinfo->rx_packets = sta->deflink.rx_stats.packets; 2624 if (sta->deflink.pcpu_rx_stats) { 2625 for_each_possible_cpu(cpu) { 2626 struct ieee80211_sta_rx_stats *cpurxs; 2627 2628 cpurxs = per_cpu_ptr(sta->deflink.pcpu_rx_stats, 2629 cpu); 2630 sinfo->rx_packets += cpurxs->packets; 2631 } 2632 } 2633 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_PACKETS); 2634 } 2635 2636 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_RETRIES))) { 2637 sinfo->tx_retries = sta->deflink.status_stats.retry_count; 2638 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_RETRIES); 2639 } 2640 2641 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_FAILED))) { 2642 sinfo->tx_failed = sta->deflink.status_stats.retry_failed; 2643 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_FAILED); 2644 } 2645 2646 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_RX_DURATION))) { 2647 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 2648 sinfo->rx_duration += sta->airtime[ac].rx_airtime; 2649 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_DURATION); 2650 } 2651 2652 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_DURATION))) { 2653 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 2654 sinfo->tx_duration += sta->airtime[ac].tx_airtime; 2655 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_DURATION); 2656 } 2657 2658 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_AIRTIME_WEIGHT))) { 2659 sinfo->airtime_weight = sta->airtime_weight; 2660 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_AIRTIME_WEIGHT); 2661 } 2662 2663 sinfo->rx_dropped_misc = sta->deflink.rx_stats.dropped; 2664 if (sta->deflink.pcpu_rx_stats) { 2665 for_each_possible_cpu(cpu) { 2666 struct ieee80211_sta_rx_stats *cpurxs; 2667 2668 cpurxs = per_cpu_ptr(sta->deflink.pcpu_rx_stats, cpu); 2669 sinfo->rx_dropped_misc += cpurxs->dropped; 2670 } 2671 } 2672 2673 if (sdata->vif.type == NL80211_IFTYPE_STATION && 2674 !(sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)) { 2675 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_BEACON_RX) | 2676 BIT_ULL(NL80211_STA_INFO_BEACON_SIGNAL_AVG); 2677 sinfo->rx_beacon_signal_avg = ieee80211_ave_rssi(&sdata->vif); 2678 } 2679 2680 if (ieee80211_hw_check(&sta->local->hw, SIGNAL_DBM) || 2681 ieee80211_hw_check(&sta->local->hw, SIGNAL_UNSPEC)) { 2682 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_SIGNAL))) { 2683 sinfo->signal = (s8)last_rxstats->last_signal; 2684 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_SIGNAL); 2685 } 2686 2687 if (!sta->deflink.pcpu_rx_stats && 2688 !(sinfo->filled & BIT_ULL(NL80211_STA_INFO_SIGNAL_AVG))) { 2689 sinfo->signal_avg = 2690 -ewma_signal_read(&sta->deflink.rx_stats_avg.signal); 2691 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_SIGNAL_AVG); 2692 } 2693 } 2694 2695 /* for the average - if pcpu_rx_stats isn't set - rxstats must point to 2696 * the sta->rx_stats struct, so the check here is fine with and without 2697 * pcpu statistics 2698 */ 2699 if (last_rxstats->chains && 2700 !(sinfo->filled & (BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL) | 2701 BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL_AVG)))) { 2702 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL); 2703 if (!sta->deflink.pcpu_rx_stats) 2704 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL_AVG); 2705 2706 sinfo->chains = last_rxstats->chains; 2707 2708 for (i = 0; i < ARRAY_SIZE(sinfo->chain_signal); i++) { 2709 sinfo->chain_signal[i] = 2710 last_rxstats->chain_signal_last[i]; 2711 sinfo->chain_signal_avg[i] = 2712 -ewma_signal_read(&sta->deflink.rx_stats_avg.chain_signal[i]); 2713 } 2714 } 2715 2716 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_BITRATE)) && 2717 !sta->sta.valid_links) { 2718 sta_set_rate_info_tx(sta, &sta->deflink.tx_stats.last_rate, 2719 &sinfo->txrate); 2720 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_BITRATE); 2721 } 2722 2723 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_RX_BITRATE)) && 2724 !sta->sta.valid_links) { 2725 if (sta_set_rate_info_rx(sta, &sinfo->rxrate) == 0) 2726 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_BITRATE); 2727 } 2728 2729 if (tidstats && !cfg80211_sinfo_alloc_tid_stats(sinfo, GFP_KERNEL)) { 2730 for (i = 0; i < IEEE80211_NUM_TIDS + 1; i++) 2731 sta_set_tidstats(sta, &sinfo->pertid[i], i); 2732 } 2733 2734 if (ieee80211_vif_is_mesh(&sdata->vif)) { 2735 #ifdef CONFIG_MAC80211_MESH 2736 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_LLID) | 2737 BIT_ULL(NL80211_STA_INFO_PLID) | 2738 BIT_ULL(NL80211_STA_INFO_PLINK_STATE) | 2739 BIT_ULL(NL80211_STA_INFO_LOCAL_PM) | 2740 BIT_ULL(NL80211_STA_INFO_PEER_PM) | 2741 BIT_ULL(NL80211_STA_INFO_NONPEER_PM) | 2742 BIT_ULL(NL80211_STA_INFO_CONNECTED_TO_GATE) | 2743 BIT_ULL(NL80211_STA_INFO_CONNECTED_TO_AS); 2744 2745 sinfo->llid = sta->mesh->llid; 2746 sinfo->plid = sta->mesh->plid; 2747 sinfo->plink_state = sta->mesh->plink_state; 2748 if (test_sta_flag(sta, WLAN_STA_TOFFSET_KNOWN)) { 2749 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_T_OFFSET); 2750 sinfo->t_offset = sta->mesh->t_offset; 2751 } 2752 sinfo->local_pm = sta->mesh->local_pm; 2753 sinfo->peer_pm = sta->mesh->peer_pm; 2754 sinfo->nonpeer_pm = sta->mesh->nonpeer_pm; 2755 sinfo->connected_to_gate = sta->mesh->connected_to_gate; 2756 sinfo->connected_to_as = sta->mesh->connected_to_as; 2757 #endif 2758 } 2759 2760 sinfo->bss_param.flags = 0; 2761 if (sdata->vif.bss_conf.use_cts_prot) 2762 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_CTS_PROT; 2763 if (sdata->vif.bss_conf.use_short_preamble) 2764 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_PREAMBLE; 2765 if (sdata->vif.bss_conf.use_short_slot) 2766 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_SLOT_TIME; 2767 sinfo->bss_param.dtim_period = sdata->vif.bss_conf.dtim_period; 2768 sinfo->bss_param.beacon_interval = sdata->vif.bss_conf.beacon_int; 2769 2770 sinfo->sta_flags.set = 0; 2771 sinfo->sta_flags.mask = BIT(NL80211_STA_FLAG_AUTHORIZED) | 2772 BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) | 2773 BIT(NL80211_STA_FLAG_WME) | 2774 BIT(NL80211_STA_FLAG_MFP) | 2775 BIT(NL80211_STA_FLAG_AUTHENTICATED) | 2776 BIT(NL80211_STA_FLAG_ASSOCIATED) | 2777 BIT(NL80211_STA_FLAG_TDLS_PEER); 2778 if (test_sta_flag(sta, WLAN_STA_AUTHORIZED)) 2779 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHORIZED); 2780 if (test_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE)) 2781 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE); 2782 if (sta->sta.wme) 2783 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_WME); 2784 if (test_sta_flag(sta, WLAN_STA_MFP)) 2785 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_MFP); 2786 if (test_sta_flag(sta, WLAN_STA_AUTH)) 2787 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHENTICATED); 2788 if (test_sta_flag(sta, WLAN_STA_ASSOC)) 2789 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_ASSOCIATED); 2790 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER)) 2791 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_TDLS_PEER); 2792 2793 thr = sta_get_expected_throughput(sta); 2794 2795 if (thr != 0) { 2796 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_EXPECTED_THROUGHPUT); 2797 sinfo->expected_throughput = thr; 2798 } 2799 2800 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL)) && 2801 sta->deflink.status_stats.ack_signal_filled) { 2802 sinfo->ack_signal = sta->deflink.status_stats.last_ack_signal; 2803 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL); 2804 } 2805 2806 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL_AVG)) && 2807 sta->deflink.status_stats.ack_signal_filled) { 2808 sinfo->avg_ack_signal = 2809 -(s8)ewma_avg_signal_read( 2810 &sta->deflink.status_stats.avg_ack_signal); 2811 sinfo->filled |= 2812 BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL_AVG); 2813 } 2814 2815 if (ieee80211_vif_is_mesh(&sdata->vif)) { 2816 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_AIRTIME_LINK_METRIC); 2817 sinfo->airtime_link_metric = 2818 airtime_link_metric_get(local, sta); 2819 } 2820 } 2821 2822 u32 sta_get_expected_throughput(struct sta_info *sta) 2823 { 2824 struct ieee80211_sub_if_data *sdata = sta->sdata; 2825 struct ieee80211_local *local = sdata->local; 2826 struct rate_control_ref *ref = NULL; 2827 u32 thr = 0; 2828 2829 if (test_sta_flag(sta, WLAN_STA_RATE_CONTROL)) 2830 ref = local->rate_ctrl; 2831 2832 /* check if the driver has a SW RC implementation */ 2833 if (ref && ref->ops->get_expected_throughput) 2834 thr = ref->ops->get_expected_throughput(sta->rate_ctrl_priv); 2835 else 2836 thr = drv_get_expected_throughput(local, sta); 2837 2838 return thr; 2839 } 2840 2841 unsigned long ieee80211_sta_last_active(struct sta_info *sta) 2842 { 2843 struct ieee80211_sta_rx_stats *stats = sta_get_last_rx_stats(sta); 2844 2845 if (!sta->deflink.status_stats.last_ack || 2846 time_after(stats->last_rx, sta->deflink.status_stats.last_ack)) 2847 return stats->last_rx; 2848 return sta->deflink.status_stats.last_ack; 2849 } 2850 2851 static void sta_update_codel_params(struct sta_info *sta, u32 thr) 2852 { 2853 if (thr && thr < STA_SLOW_THRESHOLD * sta->local->num_sta) { 2854 sta->cparams.target = MS2TIME(50); 2855 sta->cparams.interval = MS2TIME(300); 2856 sta->cparams.ecn = false; 2857 } else { 2858 sta->cparams.target = MS2TIME(20); 2859 sta->cparams.interval = MS2TIME(100); 2860 sta->cparams.ecn = true; 2861 } 2862 } 2863 2864 void ieee80211_sta_set_expected_throughput(struct ieee80211_sta *pubsta, 2865 u32 thr) 2866 { 2867 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 2868 2869 sta_update_codel_params(sta, thr); 2870 } 2871 2872 int ieee80211_sta_allocate_link(struct sta_info *sta, unsigned int link_id) 2873 { 2874 struct ieee80211_sub_if_data *sdata = sta->sdata; 2875 struct sta_link_alloc *alloc; 2876 int ret; 2877 2878 lockdep_assert_held(&sdata->local->sta_mtx); 2879 2880 /* must represent an MLD from the start */ 2881 if (WARN_ON(!sta->sta.valid_links)) 2882 return -EINVAL; 2883 2884 if (WARN_ON(sta->sta.valid_links & BIT(link_id) || 2885 sta->link[link_id])) 2886 return -EBUSY; 2887 2888 alloc = kzalloc(sizeof(*alloc), GFP_KERNEL); 2889 if (!alloc) 2890 return -ENOMEM; 2891 2892 ret = sta_info_alloc_link(sdata->local, &alloc->info, GFP_KERNEL); 2893 if (ret) { 2894 kfree(alloc); 2895 return ret; 2896 } 2897 2898 sta_info_add_link(sta, link_id, &alloc->info, &alloc->sta); 2899 2900 ieee80211_link_sta_debugfs_add(&alloc->info); 2901 2902 return 0; 2903 } 2904 2905 void ieee80211_sta_free_link(struct sta_info *sta, unsigned int link_id) 2906 { 2907 lockdep_assert_held(&sta->sdata->local->sta_mtx); 2908 2909 sta_remove_link(sta, link_id, false); 2910 } 2911 2912 int ieee80211_sta_activate_link(struct sta_info *sta, unsigned int link_id) 2913 { 2914 struct ieee80211_sub_if_data *sdata = sta->sdata; 2915 struct link_sta_info *link_sta; 2916 u16 old_links = sta->sta.valid_links; 2917 u16 new_links = old_links | BIT(link_id); 2918 int ret; 2919 2920 link_sta = rcu_dereference_protected(sta->link[link_id], 2921 lockdep_is_held(&sdata->local->sta_mtx)); 2922 2923 if (WARN_ON(old_links == new_links || !link_sta)) 2924 return -EINVAL; 2925 2926 rcu_read_lock(); 2927 if (link_sta_info_hash_lookup(sdata->local, link_sta->addr)) { 2928 rcu_read_unlock(); 2929 return -EALREADY; 2930 } 2931 /* we only modify under the mutex so this is fine */ 2932 rcu_read_unlock(); 2933 2934 sta->sta.valid_links = new_links; 2935 2936 if (!test_sta_flag(sta, WLAN_STA_INSERTED)) 2937 goto hash; 2938 2939 ieee80211_recalc_min_chandef(sdata, link_id); 2940 2941 /* Ensure the values are updated for the driver, 2942 * redone by sta_remove_link on failure. 2943 */ 2944 ieee80211_sta_recalc_aggregates(&sta->sta); 2945 2946 ret = drv_change_sta_links(sdata->local, sdata, &sta->sta, 2947 old_links, new_links); 2948 if (ret) { 2949 sta->sta.valid_links = old_links; 2950 sta_remove_link(sta, link_id, false); 2951 return ret; 2952 } 2953 2954 hash: 2955 ret = link_sta_info_hash_add(sdata->local, link_sta); 2956 WARN_ON(ret); 2957 return 0; 2958 } 2959 2960 void ieee80211_sta_remove_link(struct sta_info *sta, unsigned int link_id) 2961 { 2962 struct ieee80211_sub_if_data *sdata = sta->sdata; 2963 u16 old_links = sta->sta.valid_links; 2964 2965 lockdep_assert_held(&sdata->local->sta_mtx); 2966 2967 sta->sta.valid_links &= ~BIT(link_id); 2968 2969 if (test_sta_flag(sta, WLAN_STA_INSERTED)) 2970 drv_change_sta_links(sdata->local, sdata, &sta->sta, 2971 old_links, sta->sta.valid_links); 2972 2973 sta_remove_link(sta, link_id, true); 2974 } 2975 2976 void ieee80211_sta_set_max_amsdu_subframes(struct sta_info *sta, 2977 const u8 *ext_capab, 2978 unsigned int ext_capab_len) 2979 { 2980 u8 val; 2981 2982 sta->sta.max_amsdu_subframes = 0; 2983 2984 if (ext_capab_len < 8) 2985 return; 2986 2987 /* The sender might not have sent the last bit, consider it to be 0 */ 2988 val = u8_get_bits(ext_capab[7], WLAN_EXT_CAPA8_MAX_MSDU_IN_AMSDU_LSB); 2989 2990 /* we did get all the bits, take the MSB as well */ 2991 if (ext_capab_len >= 9) 2992 val |= u8_get_bits(ext_capab[8], 2993 WLAN_EXT_CAPA9_MAX_MSDU_IN_AMSDU_MSB) << 1; 2994 2995 if (val) 2996 sta->sta.max_amsdu_subframes = 4 << (4 - val); 2997 } 2998 2999 #ifdef CONFIG_LOCKDEP 3000 bool lockdep_sta_mutex_held(struct ieee80211_sta *pubsta) 3001 { 3002 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 3003 3004 return lockdep_is_held(&sta->local->sta_mtx); 3005 } 3006 EXPORT_SYMBOL(lockdep_sta_mutex_held); 3007 #endif 3008