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 static int sta_info_hash_del(struct ieee80211_local *local, 92 struct sta_info *sta) 93 { 94 return rhltable_remove(&local->sta_hash, &sta->hash_node, 95 sta_rht_params); 96 } 97 98 static int link_sta_info_hash_add(struct ieee80211_local *local, 99 struct link_sta_info *link_sta) 100 { 101 lockdep_assert_wiphy(local->hw.wiphy); 102 103 return rhltable_insert(&local->link_sta_hash, 104 &link_sta->link_hash_node, link_sta_rht_params); 105 } 106 107 static int link_sta_info_hash_del(struct ieee80211_local *local, 108 struct link_sta_info *link_sta) 109 { 110 lockdep_assert_wiphy(local->hw.wiphy); 111 112 return rhltable_remove(&local->link_sta_hash, 113 &link_sta->link_hash_node, link_sta_rht_params); 114 } 115 116 void ieee80211_purge_sta_txqs(struct sta_info *sta) 117 { 118 struct ieee80211_local *local = sta->sdata->local; 119 int i; 120 121 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) { 122 struct txq_info *txqi; 123 124 if (!sta->sta.txq[i]) 125 continue; 126 127 txqi = to_txq_info(sta->sta.txq[i]); 128 129 ieee80211_txq_purge(local, txqi); 130 } 131 } 132 133 static void __cleanup_single_sta(struct sta_info *sta) 134 { 135 int ac, i; 136 struct tid_ampdu_tx *tid_tx; 137 struct ieee80211_sub_if_data *sdata = sta->sdata; 138 struct ieee80211_local *local = sdata->local; 139 struct ps_data *ps; 140 141 if (test_sta_flag(sta, WLAN_STA_PS_STA) || 142 test_sta_flag(sta, WLAN_STA_PS_DRIVER) || 143 test_sta_flag(sta, WLAN_STA_PS_DELIVER)) { 144 if (sta->sdata->vif.type == NL80211_IFTYPE_AP || 145 sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 146 ps = &sdata->bss->ps; 147 else if (ieee80211_vif_is_mesh(&sdata->vif)) 148 ps = &sdata->u.mesh.ps; 149 else 150 return; 151 152 clear_sta_flag(sta, WLAN_STA_PS_STA); 153 clear_sta_flag(sta, WLAN_STA_PS_DRIVER); 154 clear_sta_flag(sta, WLAN_STA_PS_DELIVER); 155 156 atomic_dec(&ps->num_sta_ps); 157 } 158 159 ieee80211_purge_sta_txqs(sta); 160 161 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 162 local->total_ps_buffered -= skb_queue_len(&sta->ps_tx_buf[ac]); 163 ieee80211_purge_tx_queue(&local->hw, &sta->ps_tx_buf[ac]); 164 ieee80211_purge_tx_queue(&local->hw, &sta->tx_filtered[ac]); 165 } 166 167 if (ieee80211_vif_is_mesh(&sdata->vif)) 168 mesh_sta_cleanup(sta); 169 170 cancel_work_sync(&sta->drv_deliver_wk); 171 172 /* 173 * Destroy aggregation state here. It would be nice to wait for the 174 * driver to finish aggregation stop and then clean up, but for now 175 * drivers have to handle aggregation stop being requested, followed 176 * directly by station destruction. 177 */ 178 for (i = 0; i < IEEE80211_NUM_TIDS; i++) { 179 kfree(sta->ampdu_mlme.tid_start_tx[i]); 180 tid_tx = rcu_dereference_raw(sta->ampdu_mlme.tid_tx[i]); 181 if (!tid_tx) 182 continue; 183 ieee80211_purge_tx_queue(&local->hw, &tid_tx->pending); 184 kfree(tid_tx); 185 } 186 } 187 188 static void cleanup_single_sta(struct sta_info *sta) 189 { 190 struct ieee80211_sub_if_data *sdata = sta->sdata; 191 struct ieee80211_local *local = sdata->local; 192 193 __cleanup_single_sta(sta); 194 sta_info_free(local, sta); 195 } 196 197 struct rhlist_head *sta_info_hash_lookup(struct ieee80211_local *local, 198 const u8 *addr) 199 { 200 return rhltable_lookup(&local->sta_hash, addr, sta_rht_params); 201 } 202 203 /* protected by RCU */ 204 struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata, 205 const u8 *addr) 206 { 207 struct ieee80211_local *local = sdata->local; 208 struct rhlist_head *tmp; 209 struct sta_info *sta; 210 211 rcu_read_lock(); 212 for_each_sta_info(local, addr, sta, tmp) { 213 if (sta->sdata == sdata) { 214 rcu_read_unlock(); 215 /* this is safe as the caller must already hold 216 * another rcu read section or the mutex 217 */ 218 return sta; 219 } 220 } 221 rcu_read_unlock(); 222 return NULL; 223 } 224 225 /* 226 * Get sta info either from the specified interface 227 * or from one of its vlans 228 */ 229 struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata, 230 const u8 *addr) 231 { 232 struct ieee80211_local *local = sdata->local; 233 struct rhlist_head *tmp; 234 struct sta_info *sta; 235 236 rcu_read_lock(); 237 for_each_sta_info(local, addr, sta, tmp) { 238 if (sta->sdata == sdata || 239 (sta->sdata->bss && sta->sdata->bss == sdata->bss)) { 240 rcu_read_unlock(); 241 /* this is safe as the caller must already hold 242 * another rcu read section or the mutex 243 */ 244 return sta; 245 } 246 } 247 rcu_read_unlock(); 248 return NULL; 249 } 250 251 struct rhlist_head *link_sta_info_hash_lookup(struct ieee80211_local *local, 252 const u8 *addr) 253 { 254 return rhltable_lookup(&local->link_sta_hash, addr, 255 link_sta_rht_params); 256 } 257 258 struct link_sta_info * 259 link_sta_info_get_bss(struct ieee80211_sub_if_data *sdata, const u8 *addr) 260 { 261 struct ieee80211_local *local = sdata->local; 262 struct rhlist_head *tmp; 263 struct link_sta_info *link_sta; 264 265 rcu_read_lock(); 266 for_each_link_sta_info(local, addr, link_sta, tmp) { 267 struct sta_info *sta = link_sta->sta; 268 269 if (sta->sdata == sdata || 270 (sta->sdata->bss && sta->sdata->bss == sdata->bss)) { 271 rcu_read_unlock(); 272 /* this is safe as the caller must already hold 273 * another rcu read section or the mutex 274 */ 275 return link_sta; 276 } 277 } 278 rcu_read_unlock(); 279 return NULL; 280 } 281 282 struct ieee80211_sta * 283 ieee80211_find_sta_by_link_addrs(struct ieee80211_hw *hw, 284 const u8 *addr, 285 const u8 *localaddr, 286 unsigned int *link_id) 287 { 288 struct ieee80211_local *local = hw_to_local(hw); 289 struct link_sta_info *link_sta; 290 struct rhlist_head *tmp; 291 292 for_each_link_sta_info(local, addr, link_sta, tmp) { 293 struct sta_info *sta = link_sta->sta; 294 struct ieee80211_link_data *link; 295 u8 _link_id = link_sta->link_id; 296 297 if (!localaddr) { 298 if (link_id) 299 *link_id = _link_id; 300 return &sta->sta; 301 } 302 303 link = rcu_dereference(sta->sdata->link[_link_id]); 304 if (!link) 305 continue; 306 307 if (memcmp(link->conf->addr, localaddr, ETH_ALEN)) 308 continue; 309 310 if (link_id) 311 *link_id = _link_id; 312 return &sta->sta; 313 } 314 315 return NULL; 316 } 317 EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_link_addrs); 318 319 struct sta_info *sta_info_get_by_addrs(struct ieee80211_local *local, 320 const u8 *sta_addr, const u8 *vif_addr) 321 { 322 struct rhlist_head *tmp; 323 struct sta_info *sta; 324 325 for_each_sta_info(local, sta_addr, sta, tmp) { 326 if (ether_addr_equal(vif_addr, sta->sdata->vif.addr)) 327 return sta; 328 } 329 330 return NULL; 331 } 332 333 struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata, 334 int idx) 335 { 336 struct ieee80211_local *local = sdata->local; 337 struct sta_info *sta; 338 int i = 0; 339 340 list_for_each_entry_rcu(sta, &local->sta_list, list, 341 lockdep_is_held(&local->hw.wiphy->mtx)) { 342 if (sdata != sta->sdata) 343 continue; 344 if (i < idx) { 345 ++i; 346 continue; 347 } 348 return sta; 349 } 350 351 return NULL; 352 } 353 354 static void sta_info_free_link(struct link_sta_info *link_sta) 355 { 356 free_percpu(link_sta->pcpu_rx_stats); 357 } 358 359 static void sta_remove_link(struct sta_info *sta, unsigned int link_id, 360 bool unhash) 361 { 362 struct sta_link_alloc *alloc = NULL; 363 struct link_sta_info *link_sta; 364 365 lockdep_assert_wiphy(sta->local->hw.wiphy); 366 367 link_sta = rcu_access_pointer(sta->link[link_id]); 368 if (WARN_ON(!link_sta)) 369 return; 370 371 if (unhash) 372 link_sta_info_hash_del(sta->local, link_sta); 373 374 if (test_sta_flag(sta, WLAN_STA_INSERTED)) 375 ieee80211_link_sta_debugfs_remove(link_sta); 376 377 if (link_sta != &sta->deflink) 378 alloc = container_of(link_sta, typeof(*alloc), info); 379 380 sta->sta.valid_links &= ~BIT(link_id); 381 RCU_INIT_POINTER(sta->link[link_id], NULL); 382 RCU_INIT_POINTER(sta->sta.link[link_id], NULL); 383 if (alloc) { 384 sta_info_free_link(&alloc->info); 385 kfree_rcu(alloc, rcu_head); 386 } 387 388 ieee80211_sta_recalc_aggregates(&sta->sta); 389 } 390 391 /** 392 * sta_info_free - free STA 393 * 394 * @local: pointer to the global information 395 * @sta: STA info to free 396 * 397 * This function must undo everything done by sta_info_alloc() 398 * that may happen before sta_info_insert(). It may only be 399 * called when sta_info_insert() has not been attempted (and 400 * if that fails, the station is freed anyway.) 401 */ 402 void sta_info_free(struct ieee80211_local *local, struct sta_info *sta) 403 { 404 int i; 405 406 for (i = 0; i < ARRAY_SIZE(sta->link); i++) { 407 if (!(sta->sta.valid_links & BIT(i))) 408 continue; 409 410 sta_remove_link(sta, i, false); 411 } 412 413 /* 414 * If we had used sta_info_pre_move_state() then we might not 415 * have gone through the state transitions down again, so do 416 * it here now (and warn if it's inserted). 417 * 418 * This will clear state such as fast TX/RX that may have been 419 * allocated during state transitions. 420 */ 421 while (sta->sta_state > IEEE80211_STA_NONE) { 422 int ret; 423 424 WARN_ON_ONCE(test_sta_flag(sta, WLAN_STA_INSERTED)); 425 426 ret = sta_info_move_state(sta, sta->sta_state - 1); 427 if (WARN_ONCE(ret, "sta_info_move_state() returned %d\n", ret)) 428 break; 429 } 430 431 if (sta->rate_ctrl) 432 rate_control_free_sta(sta); 433 434 sta_dbg(sta->sdata, "Destroyed STA %pM\n", sta->sta.addr); 435 436 kfree(to_txq_info(sta->sta.txq[0])); 437 kfree(rcu_dereference_raw(sta->sta.rates)); 438 #ifdef CONFIG_MAC80211_MESH 439 kfree(sta->mesh); 440 #endif 441 442 sta_info_free_link(&sta->deflink); 443 kfree(sta); 444 } 445 446 static int sta_info_hash_add(struct ieee80211_local *local, 447 struct sta_info *sta) 448 { 449 return rhltable_insert(&local->sta_hash, &sta->hash_node, 450 sta_rht_params); 451 } 452 453 static void sta_deliver_ps_frames(struct work_struct *wk) 454 { 455 struct sta_info *sta; 456 457 sta = container_of(wk, struct sta_info, drv_deliver_wk); 458 459 if (sta->dead) 460 return; 461 462 local_bh_disable(); 463 if (!test_sta_flag(sta, WLAN_STA_PS_STA)) 464 ieee80211_sta_ps_deliver_wakeup(sta); 465 else if (test_and_clear_sta_flag(sta, WLAN_STA_PSPOLL)) 466 ieee80211_sta_ps_deliver_poll_response(sta); 467 else if (test_and_clear_sta_flag(sta, WLAN_STA_UAPSD)) 468 ieee80211_sta_ps_deliver_uapsd(sta); 469 local_bh_enable(); 470 } 471 472 static int sta_prepare_rate_control(struct ieee80211_local *local, 473 struct sta_info *sta, gfp_t gfp) 474 { 475 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) 476 return 0; 477 478 sta->rate_ctrl = local->rate_ctrl; 479 sta->rate_ctrl_priv = rate_control_alloc_sta(sta->rate_ctrl, 480 sta, gfp); 481 if (!sta->rate_ctrl_priv) 482 return -ENOMEM; 483 484 return 0; 485 } 486 487 static int sta_info_alloc_link(struct ieee80211_local *local, 488 struct link_sta_info *link_info, 489 gfp_t gfp) 490 { 491 struct ieee80211_hw *hw = &local->hw; 492 int i; 493 494 if (ieee80211_hw_check(hw, USES_RSS)) { 495 link_info->pcpu_rx_stats = 496 alloc_percpu_gfp(struct ieee80211_sta_rx_stats, gfp); 497 if (!link_info->pcpu_rx_stats) 498 return -ENOMEM; 499 } 500 501 link_info->rx_stats.last_rx = jiffies; 502 u64_stats_init(&link_info->rx_stats.syncp); 503 504 ewma_signal_init(&link_info->rx_stats_avg.signal); 505 ewma_avg_signal_init(&link_info->status_stats.avg_ack_signal); 506 for (i = 0; i < ARRAY_SIZE(link_info->rx_stats_avg.chain_signal); i++) 507 ewma_signal_init(&link_info->rx_stats_avg.chain_signal[i]); 508 509 return 0; 510 } 511 512 static void sta_info_add_link(struct sta_info *sta, 513 unsigned int link_id, 514 struct link_sta_info *link_info, 515 struct ieee80211_link_sta *link_sta) 516 { 517 link_info->sta = sta; 518 link_info->link_id = link_id; 519 link_info->pub = link_sta; 520 link_info->pub->sta = &sta->sta; 521 link_sta->link_id = link_id; 522 rcu_assign_pointer(sta->link[link_id], link_info); 523 rcu_assign_pointer(sta->sta.link[link_id], link_sta); 524 525 link_sta->smps_mode = IEEE80211_SMPS_OFF; 526 link_sta->agg.max_rc_amsdu_len = IEEE80211_MAX_MPDU_LEN_HT_BA; 527 } 528 529 static struct sta_info * 530 __sta_info_alloc(struct ieee80211_sub_if_data *sdata, 531 const u8 *addr, int link_id, const u8 *link_addr, 532 gfp_t gfp) 533 { 534 struct ieee80211_local *local = sdata->local; 535 struct ieee80211_hw *hw = &local->hw; 536 struct sta_info *sta; 537 void *txq_data; 538 int size; 539 int i; 540 541 sta = kzalloc(sizeof(*sta) + hw->sta_data_size, gfp); 542 if (!sta) 543 return NULL; 544 545 sta->local = local; 546 sta->sdata = sdata; 547 548 if (sta_info_alloc_link(local, &sta->deflink, gfp)) 549 goto free; 550 551 if (link_id >= 0) { 552 sta_info_add_link(sta, link_id, &sta->deflink, 553 &sta->sta.deflink); 554 sta->sta.valid_links = BIT(link_id); 555 } else { 556 sta_info_add_link(sta, 0, &sta->deflink, &sta->sta.deflink); 557 } 558 559 sta->sta.cur = &sta->sta.deflink.agg; 560 561 spin_lock_init(&sta->lock); 562 spin_lock_init(&sta->ps_lock); 563 INIT_WORK(&sta->drv_deliver_wk, sta_deliver_ps_frames); 564 wiphy_work_init(&sta->ampdu_mlme.work, ieee80211_ba_session_work); 565 #ifdef CONFIG_MAC80211_MESH 566 if (ieee80211_vif_is_mesh(&sdata->vif)) { 567 sta->mesh = kzalloc(sizeof(*sta->mesh), gfp); 568 if (!sta->mesh) 569 goto free; 570 sta->mesh->plink_sta = sta; 571 spin_lock_init(&sta->mesh->plink_lock); 572 if (!sdata->u.mesh.user_mpm) 573 timer_setup(&sta->mesh->plink_timer, mesh_plink_timer, 574 0); 575 sta->mesh->nonpeer_pm = NL80211_MESH_POWER_ACTIVE; 576 } 577 #endif 578 579 memcpy(sta->addr, addr, ETH_ALEN); 580 memcpy(sta->sta.addr, addr, ETH_ALEN); 581 memcpy(sta->deflink.addr, link_addr, ETH_ALEN); 582 memcpy(sta->sta.deflink.addr, link_addr, ETH_ALEN); 583 sta->sta.max_rx_aggregation_subframes = 584 local->hw.max_rx_aggregation_subframes; 585 586 /* TODO link specific alloc and assignments for MLO Link STA */ 587 588 /* Extended Key ID needs to install keys for keyid 0 and 1 Rx-only. 589 * The Tx path starts to use a key as soon as the key slot ptk_idx 590 * references to is not NULL. To not use the initial Rx-only key 591 * prematurely for Tx initialize ptk_idx to an impossible PTK keyid 592 * which always will refer to a NULL key. 593 */ 594 BUILD_BUG_ON(ARRAY_SIZE(sta->ptk) <= INVALID_PTK_KEYIDX); 595 sta->ptk_idx = INVALID_PTK_KEYIDX; 596 597 598 ieee80211_init_frag_cache(&sta->frags); 599 600 sta->sta_state = IEEE80211_STA_NONE; 601 602 if (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) 603 sta->amsdu_mesh_control = -1; 604 605 /* Mark TID as unreserved */ 606 sta->reserved_tid = IEEE80211_TID_UNRESERVED; 607 608 sta->last_connected = ktime_get_seconds(); 609 610 size = sizeof(struct txq_info) + 611 ALIGN(hw->txq_data_size, sizeof(void *)); 612 613 txq_data = kcalloc(ARRAY_SIZE(sta->sta.txq), size, gfp); 614 if (!txq_data) 615 goto free; 616 617 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) { 618 struct txq_info *txq = txq_data + i * size; 619 620 /* might not do anything for the (bufferable) MMPDU TXQ */ 621 ieee80211_txq_init(sdata, sta, txq, i); 622 } 623 624 if (sta_prepare_rate_control(local, sta, gfp)) 625 goto free_txq; 626 627 sta->airtime_weight = IEEE80211_DEFAULT_AIRTIME_WEIGHT; 628 629 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 630 skb_queue_head_init(&sta->ps_tx_buf[i]); 631 skb_queue_head_init(&sta->tx_filtered[i]); 632 sta->airtime[i].deficit = sta->airtime_weight; 633 atomic_set(&sta->airtime[i].aql_tx_pending, 0); 634 sta->airtime[i].aql_limit_low = local->aql_txq_limit_low[i]; 635 sta->airtime[i].aql_limit_high = local->aql_txq_limit_high[i]; 636 } 637 638 for (i = 0; i < IEEE80211_NUM_TIDS; i++) 639 sta->last_seq_ctrl[i] = cpu_to_le16(USHRT_MAX); 640 641 for (i = 0; i < NUM_NL80211_BANDS; i++) { 642 u32 mandatory = 0; 643 int r; 644 645 if (!hw->wiphy->bands[i]) 646 continue; 647 648 switch (i) { 649 case NL80211_BAND_2GHZ: 650 case NL80211_BAND_LC: 651 /* 652 * We use both here, even if we cannot really know for 653 * sure the station will support both, but the only use 654 * for this is when we don't know anything yet and send 655 * management frames, and then we'll pick the lowest 656 * possible rate anyway. 657 * If we don't include _G here, we cannot find a rate 658 * in P2P, and thus trigger the WARN_ONCE() in rate.c 659 */ 660 mandatory = IEEE80211_RATE_MANDATORY_B | 661 IEEE80211_RATE_MANDATORY_G; 662 break; 663 case NL80211_BAND_5GHZ: 664 mandatory = IEEE80211_RATE_MANDATORY_A; 665 break; 666 case NL80211_BAND_60GHZ: 667 WARN_ON(1); 668 mandatory = 0; 669 break; 670 } 671 672 for (r = 0; r < hw->wiphy->bands[i]->n_bitrates; r++) { 673 struct ieee80211_rate *rate; 674 675 rate = &hw->wiphy->bands[i]->bitrates[r]; 676 677 if (!(rate->flags & mandatory)) 678 continue; 679 sta->sta.deflink.supp_rates[i] |= BIT(r); 680 } 681 } 682 683 sta->cparams.ce_threshold = CODEL_DISABLED_THRESHOLD; 684 sta->cparams.target = MS2TIME(20); 685 sta->cparams.interval = MS2TIME(100); 686 sta->cparams.ecn = true; 687 sta->cparams.ce_threshold_selector = 0; 688 sta->cparams.ce_threshold_mask = 0; 689 690 sta_dbg(sdata, "Allocated STA %pM\n", sta->sta.addr); 691 692 return sta; 693 694 free_txq: 695 kfree(to_txq_info(sta->sta.txq[0])); 696 free: 697 sta_info_free_link(&sta->deflink); 698 #ifdef CONFIG_MAC80211_MESH 699 kfree(sta->mesh); 700 #endif 701 kfree(sta); 702 return NULL; 703 } 704 705 struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata, 706 const u8 *addr, gfp_t gfp) 707 { 708 return __sta_info_alloc(sdata, addr, -1, addr, gfp); 709 } 710 711 struct sta_info *sta_info_alloc_with_link(struct ieee80211_sub_if_data *sdata, 712 const u8 *mld_addr, 713 unsigned int link_id, 714 const u8 *link_addr, 715 gfp_t gfp) 716 { 717 return __sta_info_alloc(sdata, mld_addr, link_id, link_addr, gfp); 718 } 719 720 static int sta_info_insert_check(struct sta_info *sta) 721 { 722 struct ieee80211_sub_if_data *sdata = sta->sdata; 723 724 lockdep_assert_wiphy(sdata->local->hw.wiphy); 725 726 /* 727 * Can't be a WARN_ON because it can be triggered through a race: 728 * something inserts a STA (on one CPU) without holding the RTNL 729 * and another CPU turns off the net device. 730 */ 731 if (unlikely(!ieee80211_sdata_running(sdata))) 732 return -ENETDOWN; 733 734 if (WARN_ON(ether_addr_equal(sta->sta.addr, sdata->vif.addr) || 735 !is_valid_ether_addr(sta->sta.addr))) 736 return -EINVAL; 737 738 /* The RCU read lock is required by rhashtable due to 739 * asynchronous resize/rehash. We also require the mutex 740 * for correctness. 741 */ 742 rcu_read_lock(); 743 if (ieee80211_hw_check(&sdata->local->hw, NEEDS_UNIQUE_STA_ADDR) && 744 ieee80211_find_sta_by_ifaddr(&sdata->local->hw, sta->addr, NULL)) { 745 rcu_read_unlock(); 746 return -ENOTUNIQ; 747 } 748 rcu_read_unlock(); 749 750 return 0; 751 } 752 753 static int sta_info_insert_drv_state(struct ieee80211_local *local, 754 struct ieee80211_sub_if_data *sdata, 755 struct sta_info *sta) 756 { 757 enum ieee80211_sta_state state; 758 int err = 0; 759 760 for (state = IEEE80211_STA_NOTEXIST; state < sta->sta_state; state++) { 761 err = drv_sta_state(local, sdata, sta, state, state + 1); 762 if (err) 763 break; 764 } 765 766 if (!err) { 767 /* 768 * Drivers using legacy sta_add/sta_remove callbacks only 769 * get uploaded set to true after sta_add is called. 770 */ 771 if (!local->ops->sta_add) 772 sta->uploaded = true; 773 return 0; 774 } 775 776 if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { 777 sdata_info(sdata, 778 "failed to move IBSS STA %pM to state %d (%d) - keeping it anyway\n", 779 sta->sta.addr, state + 1, err); 780 err = 0; 781 } 782 783 /* unwind on error */ 784 for (; state > IEEE80211_STA_NOTEXIST; state--) 785 WARN_ON(drv_sta_state(local, sdata, sta, state, state - 1)); 786 787 return err; 788 } 789 790 static void 791 ieee80211_recalc_p2p_go_ps_allowed(struct ieee80211_sub_if_data *sdata) 792 { 793 struct ieee80211_local *local = sdata->local; 794 bool allow_p2p_go_ps = sdata->vif.p2p; 795 struct sta_info *sta; 796 797 rcu_read_lock(); 798 list_for_each_entry_rcu(sta, &local->sta_list, list) { 799 if (sdata != sta->sdata || 800 !test_sta_flag(sta, WLAN_STA_ASSOC)) 801 continue; 802 if (!sta->sta.support_p2p_ps) { 803 allow_p2p_go_ps = false; 804 break; 805 } 806 } 807 rcu_read_unlock(); 808 809 if (allow_p2p_go_ps != sdata->vif.bss_conf.allow_p2p_go_ps) { 810 sdata->vif.bss_conf.allow_p2p_go_ps = allow_p2p_go_ps; 811 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 812 BSS_CHANGED_P2P_PS); 813 } 814 } 815 816 static int sta_info_insert_finish(struct sta_info *sta) __acquires(RCU) 817 { 818 struct ieee80211_local *local = sta->local; 819 struct ieee80211_sub_if_data *sdata = sta->sdata; 820 struct station_info *sinfo = NULL; 821 int err = 0; 822 823 lockdep_assert_wiphy(local->hw.wiphy); 824 825 /* check if STA exists already */ 826 if (sta_info_get_bss(sdata, sta->sta.addr)) { 827 err = -EEXIST; 828 goto out_cleanup; 829 } 830 831 sinfo = kzalloc(sizeof(struct station_info), GFP_KERNEL); 832 if (!sinfo) { 833 err = -ENOMEM; 834 goto out_cleanup; 835 } 836 837 local->num_sta++; 838 local->sta_generation++; 839 smp_mb(); 840 841 /* simplify things and don't accept BA sessions yet */ 842 set_sta_flag(sta, WLAN_STA_BLOCK_BA); 843 844 /* make the station visible */ 845 err = sta_info_hash_add(local, sta); 846 if (err) 847 goto out_drop_sta; 848 849 if (sta->sta.valid_links) { 850 err = link_sta_info_hash_add(local, &sta->deflink); 851 if (err) { 852 sta_info_hash_del(local, sta); 853 goto out_drop_sta; 854 } 855 } 856 857 list_add_tail_rcu(&sta->list, &local->sta_list); 858 859 /* update channel context before notifying the driver about state 860 * change, this enables driver using the updated channel context right away. 861 */ 862 if (sta->sta_state >= IEEE80211_STA_ASSOC) { 863 ieee80211_recalc_min_chandef(sta->sdata, -1); 864 if (!sta->sta.support_p2p_ps) 865 ieee80211_recalc_p2p_go_ps_allowed(sta->sdata); 866 } 867 868 /* notify driver */ 869 err = sta_info_insert_drv_state(local, sdata, sta); 870 if (err) 871 goto out_remove; 872 873 set_sta_flag(sta, WLAN_STA_INSERTED); 874 875 /* accept BA sessions now */ 876 clear_sta_flag(sta, WLAN_STA_BLOCK_BA); 877 878 ieee80211_sta_debugfs_add(sta); 879 rate_control_add_sta_debugfs(sta); 880 if (sta->sta.valid_links) { 881 int i; 882 883 for (i = 0; i < ARRAY_SIZE(sta->link); i++) { 884 struct link_sta_info *link_sta; 885 886 link_sta = rcu_dereference_protected(sta->link[i], 887 lockdep_is_held(&local->hw.wiphy->mtx)); 888 889 if (!link_sta) 890 continue; 891 892 ieee80211_link_sta_debugfs_add(link_sta); 893 if (sdata->vif.active_links & BIT(i)) 894 ieee80211_link_sta_debugfs_drv_add(link_sta); 895 } 896 } else { 897 ieee80211_link_sta_debugfs_add(&sta->deflink); 898 ieee80211_link_sta_debugfs_drv_add(&sta->deflink); 899 } 900 901 sinfo->generation = local->sta_generation; 902 cfg80211_new_sta(sdata->dev, sta->sta.addr, sinfo, GFP_KERNEL); 903 kfree(sinfo); 904 905 sta_dbg(sdata, "Inserted STA %pM\n", sta->sta.addr); 906 907 /* move reference to rcu-protected */ 908 rcu_read_lock(); 909 910 if (ieee80211_vif_is_mesh(&sdata->vif)) 911 mesh_accept_plinks_update(sdata); 912 913 return 0; 914 out_remove: 915 if (sta->sta.valid_links) 916 link_sta_info_hash_del(local, &sta->deflink); 917 sta_info_hash_del(local, sta); 918 list_del_rcu(&sta->list); 919 out_drop_sta: 920 local->num_sta--; 921 synchronize_net(); 922 out_cleanup: 923 cleanup_single_sta(sta); 924 kfree(sinfo); 925 rcu_read_lock(); 926 return err; 927 } 928 929 int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU) 930 { 931 struct ieee80211_local *local = sta->local; 932 int err; 933 934 might_sleep(); 935 lockdep_assert_wiphy(local->hw.wiphy); 936 937 err = sta_info_insert_check(sta); 938 if (err) { 939 sta_info_free(local, sta); 940 rcu_read_lock(); 941 return err; 942 } 943 944 return sta_info_insert_finish(sta); 945 } 946 947 int sta_info_insert(struct sta_info *sta) 948 { 949 int err = sta_info_insert_rcu(sta); 950 951 rcu_read_unlock(); 952 953 return err; 954 } 955 956 static inline void __bss_tim_set(u8 *tim, u16 id) 957 { 958 /* 959 * This format has been mandated by the IEEE specifications, 960 * so this line may not be changed to use the __set_bit() format. 961 */ 962 tim[id / 8] |= (1 << (id % 8)); 963 } 964 965 static inline void __bss_tim_clear(u8 *tim, u16 id) 966 { 967 /* 968 * This format has been mandated by the IEEE specifications, 969 * so this line may not be changed to use the __clear_bit() format. 970 */ 971 tim[id / 8] &= ~(1 << (id % 8)); 972 } 973 974 static inline bool __bss_tim_get(u8 *tim, u16 id) 975 { 976 /* 977 * This format has been mandated by the IEEE specifications, 978 * so this line may not be changed to use the test_bit() format. 979 */ 980 return tim[id / 8] & (1 << (id % 8)); 981 } 982 983 static unsigned long ieee80211_tids_for_ac(int ac) 984 { 985 /* If we ever support TIDs > 7, this obviously needs to be adjusted */ 986 switch (ac) { 987 case IEEE80211_AC_VO: 988 return BIT(6) | BIT(7); 989 case IEEE80211_AC_VI: 990 return BIT(4) | BIT(5); 991 case IEEE80211_AC_BE: 992 return BIT(0) | BIT(3); 993 case IEEE80211_AC_BK: 994 return BIT(1) | BIT(2); 995 default: 996 WARN_ON(1); 997 return 0; 998 } 999 } 1000 1001 static void __sta_info_recalc_tim(struct sta_info *sta, bool ignore_pending) 1002 { 1003 struct ieee80211_local *local = sta->local; 1004 struct ps_data *ps; 1005 bool indicate_tim = false; 1006 u8 ignore_for_tim = sta->sta.uapsd_queues; 1007 int ac; 1008 u16 id = sta->sta.aid; 1009 1010 if (sta->sdata->vif.type == NL80211_IFTYPE_AP || 1011 sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 1012 if (WARN_ON_ONCE(!sta->sdata->bss)) 1013 return; 1014 1015 ps = &sta->sdata->bss->ps; 1016 #ifdef CONFIG_MAC80211_MESH 1017 } else if (ieee80211_vif_is_mesh(&sta->sdata->vif)) { 1018 ps = &sta->sdata->u.mesh.ps; 1019 #endif 1020 } else { 1021 return; 1022 } 1023 1024 /* No need to do anything if the driver does all */ 1025 if (ieee80211_hw_check(&local->hw, AP_LINK_PS) && !local->ops->set_tim) 1026 return; 1027 1028 if (sta->dead) 1029 goto done; 1030 1031 /* 1032 * If all ACs are delivery-enabled then we should build 1033 * the TIM bit for all ACs anyway; if only some are then 1034 * we ignore those and build the TIM bit using only the 1035 * non-enabled ones. 1036 */ 1037 if (ignore_for_tim == BIT(IEEE80211_NUM_ACS) - 1) 1038 ignore_for_tim = 0; 1039 1040 if (ignore_pending) 1041 ignore_for_tim = BIT(IEEE80211_NUM_ACS) - 1; 1042 1043 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1044 unsigned long tids; 1045 1046 if (ignore_for_tim & ieee80211_ac_to_qos_mask[ac]) 1047 continue; 1048 1049 indicate_tim |= !skb_queue_empty(&sta->tx_filtered[ac]) || 1050 !skb_queue_empty(&sta->ps_tx_buf[ac]); 1051 if (indicate_tim) 1052 break; 1053 1054 tids = ieee80211_tids_for_ac(ac); 1055 1056 indicate_tim |= 1057 sta->driver_buffered_tids & tids; 1058 indicate_tim |= 1059 sta->txq_buffered_tids & tids; 1060 } 1061 1062 done: 1063 spin_lock_bh(&local->tim_lock); 1064 1065 if (indicate_tim == __bss_tim_get(ps->tim, id)) 1066 goto out_unlock; 1067 1068 if (indicate_tim) 1069 __bss_tim_set(ps->tim, id); 1070 else 1071 __bss_tim_clear(ps->tim, id); 1072 1073 if (local->ops->set_tim && !WARN_ON(sta->dead)) { 1074 local->tim_in_locked_section = true; 1075 drv_set_tim(local, &sta->sta, indicate_tim); 1076 local->tim_in_locked_section = false; 1077 } 1078 1079 out_unlock: 1080 spin_unlock_bh(&local->tim_lock); 1081 } 1082 1083 void sta_info_recalc_tim(struct sta_info *sta) 1084 { 1085 __sta_info_recalc_tim(sta, false); 1086 } 1087 1088 static bool sta_info_buffer_expired(struct sta_info *sta, struct sk_buff *skb) 1089 { 1090 struct ieee80211_tx_info *info; 1091 int timeout; 1092 1093 if (!skb) 1094 return false; 1095 1096 info = IEEE80211_SKB_CB(skb); 1097 1098 /* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */ 1099 timeout = (sta->listen_interval * 1100 sta->sdata->vif.bss_conf.beacon_int * 1101 32 / 15625) * HZ; 1102 if (timeout < STA_TX_BUFFER_EXPIRE) 1103 timeout = STA_TX_BUFFER_EXPIRE; 1104 return time_after(jiffies, info->control.jiffies + timeout); 1105 } 1106 1107 1108 static bool sta_info_cleanup_expire_buffered_ac(struct ieee80211_local *local, 1109 struct sta_info *sta, int ac) 1110 { 1111 unsigned long flags; 1112 struct sk_buff *skb; 1113 1114 /* 1115 * First check for frames that should expire on the filtered 1116 * queue. Frames here were rejected by the driver and are on 1117 * a separate queue to avoid reordering with normal PS-buffered 1118 * frames. They also aren't accounted for right now in the 1119 * total_ps_buffered counter. 1120 */ 1121 for (;;) { 1122 spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags); 1123 skb = skb_peek(&sta->tx_filtered[ac]); 1124 if (sta_info_buffer_expired(sta, skb)) 1125 skb = __skb_dequeue(&sta->tx_filtered[ac]); 1126 else 1127 skb = NULL; 1128 spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags); 1129 1130 /* 1131 * Frames are queued in order, so if this one 1132 * hasn't expired yet we can stop testing. If 1133 * we actually reached the end of the queue we 1134 * also need to stop, of course. 1135 */ 1136 if (!skb) 1137 break; 1138 ieee80211_free_txskb(&local->hw, skb); 1139 } 1140 1141 /* 1142 * Now also check the normal PS-buffered queue, this will 1143 * only find something if the filtered queue was emptied 1144 * since the filtered frames are all before the normal PS 1145 * buffered frames. 1146 */ 1147 for (;;) { 1148 spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags); 1149 skb = skb_peek(&sta->ps_tx_buf[ac]); 1150 if (sta_info_buffer_expired(sta, skb)) 1151 skb = __skb_dequeue(&sta->ps_tx_buf[ac]); 1152 else 1153 skb = NULL; 1154 spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags); 1155 1156 /* 1157 * frames are queued in order, so if this one 1158 * hasn't expired yet (or we reached the end of 1159 * the queue) we can stop testing 1160 */ 1161 if (!skb) 1162 break; 1163 1164 local->total_ps_buffered--; 1165 ps_dbg(sta->sdata, "Buffered frame expired (STA %pM)\n", 1166 sta->sta.addr); 1167 ieee80211_free_txskb(&local->hw, skb); 1168 } 1169 1170 /* 1171 * Finally, recalculate the TIM bit for this station -- it might 1172 * now be clear because the station was too slow to retrieve its 1173 * frames. 1174 */ 1175 sta_info_recalc_tim(sta); 1176 1177 /* 1178 * Return whether there are any frames still buffered, this is 1179 * used to check whether the cleanup timer still needs to run, 1180 * if there are no frames we don't need to rearm the timer. 1181 */ 1182 return !(skb_queue_empty(&sta->ps_tx_buf[ac]) && 1183 skb_queue_empty(&sta->tx_filtered[ac])); 1184 } 1185 1186 static bool sta_info_cleanup_expire_buffered(struct ieee80211_local *local, 1187 struct sta_info *sta) 1188 { 1189 bool have_buffered = false; 1190 int ac; 1191 1192 /* This is only necessary for stations on BSS/MBSS interfaces */ 1193 if (!sta->sdata->bss && 1194 !ieee80211_vif_is_mesh(&sta->sdata->vif)) 1195 return false; 1196 1197 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 1198 have_buffered |= 1199 sta_info_cleanup_expire_buffered_ac(local, sta, ac); 1200 1201 return have_buffered; 1202 } 1203 1204 static int __must_check __sta_info_destroy_part1(struct sta_info *sta) 1205 { 1206 struct ieee80211_local *local; 1207 struct ieee80211_sub_if_data *sdata; 1208 int ret, i; 1209 1210 might_sleep(); 1211 1212 if (!sta) 1213 return -ENOENT; 1214 1215 local = sta->local; 1216 sdata = sta->sdata; 1217 1218 lockdep_assert_wiphy(local->hw.wiphy); 1219 1220 /* 1221 * Before removing the station from the driver and 1222 * rate control, it might still start new aggregation 1223 * sessions -- block that to make sure the tear-down 1224 * will be sufficient. 1225 */ 1226 set_sta_flag(sta, WLAN_STA_BLOCK_BA); 1227 ieee80211_sta_tear_down_BA_sessions(sta, AGG_STOP_DESTROY_STA); 1228 1229 /* 1230 * Before removing the station from the driver there might be pending 1231 * rx frames on RSS queues sent prior to the disassociation - wait for 1232 * all such frames to be processed. 1233 */ 1234 drv_sync_rx_queues(local, sta); 1235 1236 for (i = 0; i < ARRAY_SIZE(sta->link); i++) { 1237 struct link_sta_info *link_sta; 1238 1239 if (!(sta->sta.valid_links & BIT(i))) 1240 continue; 1241 1242 link_sta = rcu_dereference_protected(sta->link[i], 1243 lockdep_is_held(&local->hw.wiphy->mtx)); 1244 1245 link_sta_info_hash_del(local, link_sta); 1246 } 1247 1248 ret = sta_info_hash_del(local, sta); 1249 if (WARN_ON(ret)) 1250 return ret; 1251 1252 /* 1253 * for TDLS peers, make sure to return to the base channel before 1254 * removal. 1255 */ 1256 if (test_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL)) { 1257 drv_tdls_cancel_channel_switch(local, sdata, &sta->sta); 1258 clear_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL); 1259 } 1260 1261 list_del_rcu(&sta->list); 1262 sta->removed = true; 1263 1264 if (sta->uploaded) 1265 drv_sta_pre_rcu_remove(local, sta->sdata, sta); 1266 1267 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN && 1268 rcu_access_pointer(sdata->u.vlan.sta) == sta) 1269 RCU_INIT_POINTER(sdata->u.vlan.sta, NULL); 1270 1271 return 0; 1272 } 1273 1274 static int _sta_info_move_state(struct sta_info *sta, 1275 enum ieee80211_sta_state new_state, 1276 bool recalc) 1277 { 1278 struct ieee80211_local *local = sta->local; 1279 1280 might_sleep(); 1281 1282 if (sta->sta_state == new_state) 1283 return 0; 1284 1285 /* check allowed transitions first */ 1286 1287 switch (new_state) { 1288 case IEEE80211_STA_NONE: 1289 if (sta->sta_state != IEEE80211_STA_AUTH) 1290 return -EINVAL; 1291 break; 1292 case IEEE80211_STA_AUTH: 1293 if (sta->sta_state != IEEE80211_STA_NONE && 1294 sta->sta_state != IEEE80211_STA_ASSOC) 1295 return -EINVAL; 1296 break; 1297 case IEEE80211_STA_ASSOC: 1298 if (sta->sta_state != IEEE80211_STA_AUTH && 1299 sta->sta_state != IEEE80211_STA_AUTHORIZED) 1300 return -EINVAL; 1301 break; 1302 case IEEE80211_STA_AUTHORIZED: 1303 if (sta->sta_state != IEEE80211_STA_ASSOC) 1304 return -EINVAL; 1305 break; 1306 default: 1307 WARN(1, "invalid state %d", new_state); 1308 return -EINVAL; 1309 } 1310 1311 sta_dbg(sta->sdata, "moving STA %pM to state %d\n", 1312 sta->sta.addr, new_state); 1313 1314 /* notify the driver before the actual changes so it can 1315 * fail the transition 1316 */ 1317 if (test_sta_flag(sta, WLAN_STA_INSERTED)) { 1318 int err = drv_sta_state(sta->local, sta->sdata, sta, 1319 sta->sta_state, new_state); 1320 if (err) 1321 return err; 1322 } 1323 1324 /* reflect the change in all state variables */ 1325 1326 switch (new_state) { 1327 case IEEE80211_STA_NONE: 1328 if (sta->sta_state == IEEE80211_STA_AUTH) 1329 clear_bit(WLAN_STA_AUTH, &sta->_flags); 1330 break; 1331 case IEEE80211_STA_AUTH: 1332 if (sta->sta_state == IEEE80211_STA_NONE) { 1333 set_bit(WLAN_STA_AUTH, &sta->_flags); 1334 } else if (sta->sta_state == IEEE80211_STA_ASSOC) { 1335 clear_bit(WLAN_STA_ASSOC, &sta->_flags); 1336 if (recalc) { 1337 ieee80211_recalc_min_chandef(sta->sdata, -1); 1338 if (!sta->sta.support_p2p_ps) 1339 ieee80211_recalc_p2p_go_ps_allowed(sta->sdata); 1340 } 1341 } 1342 break; 1343 case IEEE80211_STA_ASSOC: 1344 if (sta->sta_state == IEEE80211_STA_AUTH) { 1345 set_bit(WLAN_STA_ASSOC, &sta->_flags); 1346 sta->assoc_at = ktime_get_boottime_ns(); 1347 if (recalc) { 1348 ieee80211_recalc_min_chandef(sta->sdata, -1); 1349 if (!sta->sta.support_p2p_ps) 1350 ieee80211_recalc_p2p_go_ps_allowed(sta->sdata); 1351 } 1352 } else if (sta->sta_state == IEEE80211_STA_AUTHORIZED) { 1353 ieee80211_vif_dec_num_mcast(sta->sdata); 1354 clear_bit(WLAN_STA_AUTHORIZED, &sta->_flags); 1355 1356 /* 1357 * If we have encryption offload, flush (station) queues 1358 * (after ensuring concurrent TX completed) so we won't 1359 * transmit anything later unencrypted if/when keys are 1360 * also removed, which might otherwise happen depending 1361 * on how the hardware offload works. 1362 */ 1363 if (local->ops->set_key) { 1364 synchronize_net(); 1365 if (local->ops->flush_sta) 1366 drv_flush_sta(local, sta->sdata, sta); 1367 else 1368 ieee80211_flush_queues(local, 1369 sta->sdata, 1370 false); 1371 } 1372 1373 ieee80211_clear_fast_xmit(sta); 1374 ieee80211_clear_fast_rx(sta); 1375 } 1376 break; 1377 case IEEE80211_STA_AUTHORIZED: 1378 if (sta->sta_state == IEEE80211_STA_ASSOC) { 1379 ieee80211_vif_inc_num_mcast(sta->sdata); 1380 set_bit(WLAN_STA_AUTHORIZED, &sta->_flags); 1381 ieee80211_check_fast_xmit(sta); 1382 ieee80211_check_fast_rx(sta); 1383 } 1384 if (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN || 1385 sta->sdata->vif.type == NL80211_IFTYPE_AP) 1386 cfg80211_send_layer2_update(sta->sdata->dev, 1387 sta->sta.addr); 1388 break; 1389 default: 1390 break; 1391 } 1392 1393 sta->sta_state = new_state; 1394 1395 return 0; 1396 } 1397 1398 int sta_info_move_state(struct sta_info *sta, 1399 enum ieee80211_sta_state new_state) 1400 { 1401 return _sta_info_move_state(sta, new_state, true); 1402 } 1403 1404 static void __sta_info_destroy_part2(struct sta_info *sta, bool recalc) 1405 { 1406 struct ieee80211_local *local = sta->local; 1407 struct ieee80211_sub_if_data *sdata = sta->sdata; 1408 struct station_info *sinfo; 1409 int ret; 1410 1411 /* 1412 * NOTE: This assumes at least synchronize_net() was done 1413 * after _part1 and before _part2! 1414 */ 1415 1416 /* 1417 * There's a potential race in _part1 where we set WLAN_STA_BLOCK_BA 1418 * but someone might have just gotten past a check, and not yet into 1419 * queuing the work/creating the data/etc. 1420 * 1421 * Do another round of destruction so that the worker is certainly 1422 * canceled before we later free the station. 1423 * 1424 * Since this is after synchronize_rcu()/synchronize_net() we're now 1425 * certain that nobody can actually hold a reference to the STA and 1426 * be calling e.g. ieee80211_start_tx_ba_session(). 1427 */ 1428 ieee80211_sta_tear_down_BA_sessions(sta, AGG_STOP_DESTROY_STA); 1429 1430 might_sleep(); 1431 lockdep_assert_wiphy(local->hw.wiphy); 1432 1433 if (sta->sta_state == IEEE80211_STA_AUTHORIZED) { 1434 ret = _sta_info_move_state(sta, IEEE80211_STA_ASSOC, recalc); 1435 WARN_ON_ONCE(ret); 1436 } 1437 1438 /* now keys can no longer be reached */ 1439 ieee80211_free_sta_keys(local, sta); 1440 1441 /* disable TIM bit - last chance to tell driver */ 1442 __sta_info_recalc_tim(sta, true); 1443 1444 sta->dead = true; 1445 1446 local->num_sta--; 1447 local->sta_generation++; 1448 1449 while (sta->sta_state > IEEE80211_STA_NONE) { 1450 ret = _sta_info_move_state(sta, sta->sta_state - 1, recalc); 1451 if (ret) { 1452 WARN_ON_ONCE(1); 1453 break; 1454 } 1455 } 1456 1457 if (sta->uploaded) { 1458 ret = drv_sta_state(local, sdata, sta, IEEE80211_STA_NONE, 1459 IEEE80211_STA_NOTEXIST); 1460 WARN_ON_ONCE(ret != 0); 1461 } 1462 1463 sta_dbg(sdata, "Removed STA %pM\n", sta->sta.addr); 1464 1465 sinfo = kzalloc(sizeof(*sinfo), GFP_KERNEL); 1466 if (sinfo) 1467 sta_set_sinfo(sta, sinfo, true); 1468 cfg80211_del_sta_sinfo(sdata->dev, sta->sta.addr, sinfo, GFP_KERNEL); 1469 kfree(sinfo); 1470 1471 ieee80211_sta_debugfs_remove(sta); 1472 1473 ieee80211_destroy_frag_cache(&sta->frags); 1474 1475 cleanup_single_sta(sta); 1476 } 1477 1478 int __must_check __sta_info_destroy(struct sta_info *sta) 1479 { 1480 int err = __sta_info_destroy_part1(sta); 1481 1482 if (err) 1483 return err; 1484 1485 synchronize_net(); 1486 1487 __sta_info_destroy_part2(sta, true); 1488 1489 return 0; 1490 } 1491 1492 int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, const u8 *addr) 1493 { 1494 struct sta_info *sta; 1495 1496 lockdep_assert_wiphy(sdata->local->hw.wiphy); 1497 1498 sta = sta_info_get(sdata, addr); 1499 return __sta_info_destroy(sta); 1500 } 1501 1502 int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata, 1503 const u8 *addr) 1504 { 1505 struct sta_info *sta; 1506 1507 lockdep_assert_wiphy(sdata->local->hw.wiphy); 1508 1509 sta = sta_info_get_bss(sdata, addr); 1510 return __sta_info_destroy(sta); 1511 } 1512 1513 static void sta_info_cleanup(struct timer_list *t) 1514 { 1515 struct ieee80211_local *local = from_timer(local, t, sta_cleanup); 1516 struct sta_info *sta; 1517 bool timer_needed = false; 1518 1519 rcu_read_lock(); 1520 list_for_each_entry_rcu(sta, &local->sta_list, list) 1521 if (sta_info_cleanup_expire_buffered(local, sta)) 1522 timer_needed = true; 1523 rcu_read_unlock(); 1524 1525 if (local->quiescing) 1526 return; 1527 1528 if (!timer_needed) 1529 return; 1530 1531 mod_timer(&local->sta_cleanup, 1532 round_jiffies(jiffies + STA_INFO_CLEANUP_INTERVAL)); 1533 } 1534 1535 int sta_info_init(struct ieee80211_local *local) 1536 { 1537 int err; 1538 1539 err = rhltable_init(&local->sta_hash, &sta_rht_params); 1540 if (err) 1541 return err; 1542 1543 err = rhltable_init(&local->link_sta_hash, &link_sta_rht_params); 1544 if (err) { 1545 rhltable_destroy(&local->sta_hash); 1546 return err; 1547 } 1548 1549 spin_lock_init(&local->tim_lock); 1550 INIT_LIST_HEAD(&local->sta_list); 1551 1552 timer_setup(&local->sta_cleanup, sta_info_cleanup, 0); 1553 return 0; 1554 } 1555 1556 void sta_info_stop(struct ieee80211_local *local) 1557 { 1558 del_timer_sync(&local->sta_cleanup); 1559 rhltable_destroy(&local->sta_hash); 1560 rhltable_destroy(&local->link_sta_hash); 1561 } 1562 1563 1564 int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans) 1565 { 1566 struct ieee80211_local *local = sdata->local; 1567 struct sta_info *sta, *tmp; 1568 LIST_HEAD(free_list); 1569 int ret = 0; 1570 1571 might_sleep(); 1572 lockdep_assert_wiphy(local->hw.wiphy); 1573 1574 WARN_ON(vlans && sdata->vif.type != NL80211_IFTYPE_AP); 1575 WARN_ON(vlans && !sdata->bss); 1576 1577 list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { 1578 if (sdata == sta->sdata || 1579 (vlans && sdata->bss == sta->sdata->bss)) { 1580 if (!WARN_ON(__sta_info_destroy_part1(sta))) 1581 list_add(&sta->free_list, &free_list); 1582 ret++; 1583 } 1584 } 1585 1586 if (!list_empty(&free_list)) { 1587 bool support_p2p_ps = true; 1588 1589 synchronize_net(); 1590 list_for_each_entry_safe(sta, tmp, &free_list, free_list) { 1591 if (!sta->sta.support_p2p_ps) 1592 support_p2p_ps = false; 1593 __sta_info_destroy_part2(sta, false); 1594 } 1595 1596 ieee80211_recalc_min_chandef(sdata, -1); 1597 if (!support_p2p_ps) 1598 ieee80211_recalc_p2p_go_ps_allowed(sdata); 1599 } 1600 1601 return ret; 1602 } 1603 1604 void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, 1605 unsigned long exp_time) 1606 { 1607 struct ieee80211_local *local = sdata->local; 1608 struct sta_info *sta, *tmp; 1609 1610 lockdep_assert_wiphy(local->hw.wiphy); 1611 1612 list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { 1613 unsigned long last_active = ieee80211_sta_last_active(sta); 1614 1615 if (sdata != sta->sdata) 1616 continue; 1617 1618 if (time_is_before_jiffies(last_active + exp_time)) { 1619 sta_dbg(sta->sdata, "expiring inactive STA %pM\n", 1620 sta->sta.addr); 1621 1622 if (ieee80211_vif_is_mesh(&sdata->vif) && 1623 test_sta_flag(sta, WLAN_STA_PS_STA)) 1624 atomic_dec(&sdata->u.mesh.ps.num_sta_ps); 1625 1626 WARN_ON(__sta_info_destroy(sta)); 1627 } 1628 } 1629 } 1630 1631 struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw, 1632 const u8 *addr, 1633 const u8 *localaddr) 1634 { 1635 struct ieee80211_local *local = hw_to_local(hw); 1636 struct rhlist_head *tmp; 1637 struct sta_info *sta; 1638 1639 /* 1640 * Just return a random station if localaddr is NULL 1641 * ... first in list. 1642 */ 1643 for_each_sta_info(local, addr, sta, tmp) { 1644 if (localaddr && 1645 !ether_addr_equal(sta->sdata->vif.addr, localaddr)) 1646 continue; 1647 if (!sta->uploaded) 1648 return NULL; 1649 return &sta->sta; 1650 } 1651 1652 return NULL; 1653 } 1654 EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_ifaddr); 1655 1656 struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif, 1657 const u8 *addr) 1658 { 1659 struct sta_info *sta; 1660 1661 if (!vif) 1662 return NULL; 1663 1664 sta = sta_info_get_bss(vif_to_sdata(vif), addr); 1665 if (!sta) 1666 return NULL; 1667 1668 if (!sta->uploaded) 1669 return NULL; 1670 1671 return &sta->sta; 1672 } 1673 EXPORT_SYMBOL(ieee80211_find_sta); 1674 1675 /* powersave support code */ 1676 void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta) 1677 { 1678 struct ieee80211_sub_if_data *sdata = sta->sdata; 1679 struct ieee80211_local *local = sdata->local; 1680 struct sk_buff_head pending; 1681 int filtered = 0, buffered = 0, ac, i; 1682 unsigned long flags; 1683 struct ps_data *ps; 1684 1685 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 1686 sdata = container_of(sdata->bss, struct ieee80211_sub_if_data, 1687 u.ap); 1688 1689 if (sdata->vif.type == NL80211_IFTYPE_AP) 1690 ps = &sdata->bss->ps; 1691 else if (ieee80211_vif_is_mesh(&sdata->vif)) 1692 ps = &sdata->u.mesh.ps; 1693 else 1694 return; 1695 1696 clear_sta_flag(sta, WLAN_STA_SP); 1697 1698 BUILD_BUG_ON(BITS_TO_LONGS(IEEE80211_NUM_TIDS) > 1); 1699 sta->driver_buffered_tids = 0; 1700 sta->txq_buffered_tids = 0; 1701 1702 if (!ieee80211_hw_check(&local->hw, AP_LINK_PS)) 1703 drv_sta_notify(local, sdata, STA_NOTIFY_AWAKE, &sta->sta); 1704 1705 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) { 1706 if (!sta->sta.txq[i] || !txq_has_queue(sta->sta.txq[i])) 1707 continue; 1708 1709 schedule_and_wake_txq(local, to_txq_info(sta->sta.txq[i])); 1710 } 1711 1712 skb_queue_head_init(&pending); 1713 1714 /* sync with ieee80211_tx_h_unicast_ps_buf */ 1715 spin_lock(&sta->ps_lock); 1716 /* Send all buffered frames to the station */ 1717 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1718 int count = skb_queue_len(&pending), tmp; 1719 1720 spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags); 1721 skb_queue_splice_tail_init(&sta->tx_filtered[ac], &pending); 1722 spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags); 1723 tmp = skb_queue_len(&pending); 1724 filtered += tmp - count; 1725 count = tmp; 1726 1727 spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags); 1728 skb_queue_splice_tail_init(&sta->ps_tx_buf[ac], &pending); 1729 spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags); 1730 tmp = skb_queue_len(&pending); 1731 buffered += tmp - count; 1732 } 1733 1734 ieee80211_add_pending_skbs(local, &pending); 1735 1736 /* now we're no longer in the deliver code */ 1737 clear_sta_flag(sta, WLAN_STA_PS_DELIVER); 1738 1739 /* The station might have polled and then woken up before we responded, 1740 * so clear these flags now to avoid them sticking around. 1741 */ 1742 clear_sta_flag(sta, WLAN_STA_PSPOLL); 1743 clear_sta_flag(sta, WLAN_STA_UAPSD); 1744 spin_unlock(&sta->ps_lock); 1745 1746 atomic_dec(&ps->num_sta_ps); 1747 1748 local->total_ps_buffered -= buffered; 1749 1750 sta_info_recalc_tim(sta); 1751 1752 ps_dbg(sdata, 1753 "STA %pM aid %d sending %d filtered/%d PS frames since STA woke up\n", 1754 sta->sta.addr, sta->sta.aid, filtered, buffered); 1755 1756 ieee80211_check_fast_xmit(sta); 1757 } 1758 1759 static void ieee80211_send_null_response(struct sta_info *sta, int tid, 1760 enum ieee80211_frame_release_type reason, 1761 bool call_driver, bool more_data) 1762 { 1763 struct ieee80211_sub_if_data *sdata = sta->sdata; 1764 struct ieee80211_local *local = sdata->local; 1765 struct ieee80211_qos_hdr *nullfunc; 1766 struct sk_buff *skb; 1767 int size = sizeof(*nullfunc); 1768 __le16 fc; 1769 bool qos = sta->sta.wme; 1770 struct ieee80211_tx_info *info; 1771 struct ieee80211_chanctx_conf *chanctx_conf; 1772 1773 if (qos) { 1774 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | 1775 IEEE80211_STYPE_QOS_NULLFUNC | 1776 IEEE80211_FCTL_FROMDS); 1777 } else { 1778 size -= 2; 1779 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | 1780 IEEE80211_STYPE_NULLFUNC | 1781 IEEE80211_FCTL_FROMDS); 1782 } 1783 1784 skb = dev_alloc_skb(local->hw.extra_tx_headroom + size); 1785 if (!skb) 1786 return; 1787 1788 skb_reserve(skb, local->hw.extra_tx_headroom); 1789 1790 nullfunc = skb_put(skb, size); 1791 nullfunc->frame_control = fc; 1792 nullfunc->duration_id = 0; 1793 memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN); 1794 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 1795 memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN); 1796 nullfunc->seq_ctrl = 0; 1797 1798 skb->priority = tid; 1799 skb_set_queue_mapping(skb, ieee802_1d_to_ac[tid]); 1800 if (qos) { 1801 nullfunc->qos_ctrl = cpu_to_le16(tid); 1802 1803 if (reason == IEEE80211_FRAME_RELEASE_UAPSD) { 1804 nullfunc->qos_ctrl |= 1805 cpu_to_le16(IEEE80211_QOS_CTL_EOSP); 1806 if (more_data) 1807 nullfunc->frame_control |= 1808 cpu_to_le16(IEEE80211_FCTL_MOREDATA); 1809 } 1810 } 1811 1812 info = IEEE80211_SKB_CB(skb); 1813 1814 /* 1815 * Tell TX path to send this frame even though the 1816 * STA may still remain is PS mode after this frame 1817 * exchange. Also set EOSP to indicate this packet 1818 * ends the poll/service period. 1819 */ 1820 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER | 1821 IEEE80211_TX_STATUS_EOSP | 1822 IEEE80211_TX_CTL_REQ_TX_STATUS; 1823 1824 info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE; 1825 1826 if (call_driver) 1827 drv_allow_buffered_frames(local, sta, BIT(tid), 1, 1828 reason, false); 1829 1830 skb->dev = sdata->dev; 1831 1832 rcu_read_lock(); 1833 chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf); 1834 if (WARN_ON(!chanctx_conf)) { 1835 rcu_read_unlock(); 1836 kfree_skb(skb); 1837 return; 1838 } 1839 1840 info->band = chanctx_conf->def.chan->band; 1841 ieee80211_xmit(sdata, sta, skb); 1842 rcu_read_unlock(); 1843 } 1844 1845 static int find_highest_prio_tid(unsigned long tids) 1846 { 1847 /* lower 3 TIDs aren't ordered perfectly */ 1848 if (tids & 0xF8) 1849 return fls(tids) - 1; 1850 /* TID 0 is BE just like TID 3 */ 1851 if (tids & BIT(0)) 1852 return 0; 1853 return fls(tids) - 1; 1854 } 1855 1856 /* Indicates if the MORE_DATA bit should be set in the last 1857 * frame obtained by ieee80211_sta_ps_get_frames. 1858 * Note that driver_release_tids is relevant only if 1859 * reason = IEEE80211_FRAME_RELEASE_PSPOLL 1860 */ 1861 static bool 1862 ieee80211_sta_ps_more_data(struct sta_info *sta, u8 ignored_acs, 1863 enum ieee80211_frame_release_type reason, 1864 unsigned long driver_release_tids) 1865 { 1866 int ac; 1867 1868 /* If the driver has data on more than one TID then 1869 * certainly there's more data if we release just a 1870 * single frame now (from a single TID). This will 1871 * only happen for PS-Poll. 1872 */ 1873 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL && 1874 hweight16(driver_release_tids) > 1) 1875 return true; 1876 1877 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1878 if (ignored_acs & ieee80211_ac_to_qos_mask[ac]) 1879 continue; 1880 1881 if (!skb_queue_empty(&sta->tx_filtered[ac]) || 1882 !skb_queue_empty(&sta->ps_tx_buf[ac])) 1883 return true; 1884 } 1885 1886 return false; 1887 } 1888 1889 static void 1890 ieee80211_sta_ps_get_frames(struct sta_info *sta, int n_frames, u8 ignored_acs, 1891 enum ieee80211_frame_release_type reason, 1892 struct sk_buff_head *frames, 1893 unsigned long *driver_release_tids) 1894 { 1895 struct ieee80211_sub_if_data *sdata = sta->sdata; 1896 struct ieee80211_local *local = sdata->local; 1897 int ac; 1898 1899 /* Get response frame(s) and more data bit for the last one. */ 1900 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1901 unsigned long tids; 1902 1903 if (ignored_acs & ieee80211_ac_to_qos_mask[ac]) 1904 continue; 1905 1906 tids = ieee80211_tids_for_ac(ac); 1907 1908 /* if we already have frames from software, then we can't also 1909 * release from hardware queues 1910 */ 1911 if (skb_queue_empty(frames)) { 1912 *driver_release_tids |= 1913 sta->driver_buffered_tids & tids; 1914 *driver_release_tids |= sta->txq_buffered_tids & tids; 1915 } 1916 1917 if (!*driver_release_tids) { 1918 struct sk_buff *skb; 1919 1920 while (n_frames > 0) { 1921 skb = skb_dequeue(&sta->tx_filtered[ac]); 1922 if (!skb) { 1923 skb = skb_dequeue( 1924 &sta->ps_tx_buf[ac]); 1925 if (skb) 1926 local->total_ps_buffered--; 1927 } 1928 if (!skb) 1929 break; 1930 n_frames--; 1931 __skb_queue_tail(frames, skb); 1932 } 1933 } 1934 1935 /* If we have more frames buffered on this AC, then abort the 1936 * loop since we can't send more data from other ACs before 1937 * the buffered frames from this. 1938 */ 1939 if (!skb_queue_empty(&sta->tx_filtered[ac]) || 1940 !skb_queue_empty(&sta->ps_tx_buf[ac])) 1941 break; 1942 } 1943 } 1944 1945 static void 1946 ieee80211_sta_ps_deliver_response(struct sta_info *sta, 1947 int n_frames, u8 ignored_acs, 1948 enum ieee80211_frame_release_type reason) 1949 { 1950 struct ieee80211_sub_if_data *sdata = sta->sdata; 1951 struct ieee80211_local *local = sdata->local; 1952 unsigned long driver_release_tids = 0; 1953 struct sk_buff_head frames; 1954 bool more_data; 1955 1956 /* Service or PS-Poll period starts */ 1957 set_sta_flag(sta, WLAN_STA_SP); 1958 1959 __skb_queue_head_init(&frames); 1960 1961 ieee80211_sta_ps_get_frames(sta, n_frames, ignored_acs, reason, 1962 &frames, &driver_release_tids); 1963 1964 more_data = ieee80211_sta_ps_more_data(sta, ignored_acs, reason, driver_release_tids); 1965 1966 if (driver_release_tids && reason == IEEE80211_FRAME_RELEASE_PSPOLL) 1967 driver_release_tids = 1968 BIT(find_highest_prio_tid(driver_release_tids)); 1969 1970 if (skb_queue_empty(&frames) && !driver_release_tids) { 1971 int tid, ac; 1972 1973 /* 1974 * For PS-Poll, this can only happen due to a race condition 1975 * when we set the TIM bit and the station notices it, but 1976 * before it can poll for the frame we expire it. 1977 * 1978 * For uAPSD, this is said in the standard (11.2.1.5 h): 1979 * At each unscheduled SP for a non-AP STA, the AP shall 1980 * attempt to transmit at least one MSDU or MMPDU, but no 1981 * more than the value specified in the Max SP Length field 1982 * in the QoS Capability element from delivery-enabled ACs, 1983 * that are destined for the non-AP STA. 1984 * 1985 * Since we have no other MSDU/MMPDU, transmit a QoS null frame. 1986 */ 1987 1988 /* This will evaluate to 1, 3, 5 or 7. */ 1989 for (ac = IEEE80211_AC_VO; ac < IEEE80211_NUM_ACS; ac++) 1990 if (!(ignored_acs & ieee80211_ac_to_qos_mask[ac])) 1991 break; 1992 tid = 7 - 2 * ac; 1993 1994 ieee80211_send_null_response(sta, tid, reason, true, false); 1995 } else if (!driver_release_tids) { 1996 struct sk_buff_head pending; 1997 struct sk_buff *skb; 1998 int num = 0; 1999 u16 tids = 0; 2000 bool need_null = false; 2001 2002 skb_queue_head_init(&pending); 2003 2004 while ((skb = __skb_dequeue(&frames))) { 2005 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 2006 struct ieee80211_hdr *hdr = (void *) skb->data; 2007 u8 *qoshdr = NULL; 2008 2009 num++; 2010 2011 /* 2012 * Tell TX path to send this frame even though the 2013 * STA may still remain is PS mode after this frame 2014 * exchange. 2015 */ 2016 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER; 2017 info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE; 2018 2019 /* 2020 * Use MoreData flag to indicate whether there are 2021 * more buffered frames for this STA 2022 */ 2023 if (more_data || !skb_queue_empty(&frames)) 2024 hdr->frame_control |= 2025 cpu_to_le16(IEEE80211_FCTL_MOREDATA); 2026 else 2027 hdr->frame_control &= 2028 cpu_to_le16(~IEEE80211_FCTL_MOREDATA); 2029 2030 if (ieee80211_is_data_qos(hdr->frame_control) || 2031 ieee80211_is_qos_nullfunc(hdr->frame_control)) 2032 qoshdr = ieee80211_get_qos_ctl(hdr); 2033 2034 tids |= BIT(skb->priority); 2035 2036 __skb_queue_tail(&pending, skb); 2037 2038 /* end service period after last frame or add one */ 2039 if (!skb_queue_empty(&frames)) 2040 continue; 2041 2042 if (reason != IEEE80211_FRAME_RELEASE_UAPSD) { 2043 /* for PS-Poll, there's only one frame */ 2044 info->flags |= IEEE80211_TX_STATUS_EOSP | 2045 IEEE80211_TX_CTL_REQ_TX_STATUS; 2046 break; 2047 } 2048 2049 /* For uAPSD, things are a bit more complicated. If the 2050 * last frame has a QoS header (i.e. is a QoS-data or 2051 * QoS-nulldata frame) then just set the EOSP bit there 2052 * and be done. 2053 * If the frame doesn't have a QoS header (which means 2054 * it should be a bufferable MMPDU) then we can't set 2055 * the EOSP bit in the QoS header; add a QoS-nulldata 2056 * frame to the list to send it after the MMPDU. 2057 * 2058 * Note that this code is only in the mac80211-release 2059 * code path, we assume that the driver will not buffer 2060 * anything but QoS-data frames, or if it does, will 2061 * create the QoS-nulldata frame by itself if needed. 2062 * 2063 * Cf. 802.11-2012 10.2.1.10 (c). 2064 */ 2065 if (qoshdr) { 2066 *qoshdr |= IEEE80211_QOS_CTL_EOSP; 2067 2068 info->flags |= IEEE80211_TX_STATUS_EOSP | 2069 IEEE80211_TX_CTL_REQ_TX_STATUS; 2070 } else { 2071 /* The standard isn't completely clear on this 2072 * as it says the more-data bit should be set 2073 * if there are more BUs. The QoS-Null frame 2074 * we're about to send isn't buffered yet, we 2075 * only create it below, but let's pretend it 2076 * was buffered just in case some clients only 2077 * expect more-data=0 when eosp=1. 2078 */ 2079 hdr->frame_control |= 2080 cpu_to_le16(IEEE80211_FCTL_MOREDATA); 2081 need_null = true; 2082 num++; 2083 } 2084 break; 2085 } 2086 2087 drv_allow_buffered_frames(local, sta, tids, num, 2088 reason, more_data); 2089 2090 ieee80211_add_pending_skbs(local, &pending); 2091 2092 if (need_null) 2093 ieee80211_send_null_response( 2094 sta, find_highest_prio_tid(tids), 2095 reason, false, false); 2096 2097 sta_info_recalc_tim(sta); 2098 } else { 2099 int tid; 2100 2101 /* 2102 * We need to release a frame that is buffered somewhere in the 2103 * driver ... it'll have to handle that. 2104 * Note that the driver also has to check the number of frames 2105 * on the TIDs we're releasing from - if there are more than 2106 * n_frames it has to set the more-data bit (if we didn't ask 2107 * it to set it anyway due to other buffered frames); if there 2108 * are fewer than n_frames it has to make sure to adjust that 2109 * to allow the service period to end properly. 2110 */ 2111 drv_release_buffered_frames(local, sta, driver_release_tids, 2112 n_frames, reason, more_data); 2113 2114 /* 2115 * Note that we don't recalculate the TIM bit here as it would 2116 * most likely have no effect at all unless the driver told us 2117 * that the TID(s) became empty before returning here from the 2118 * release function. 2119 * Either way, however, when the driver tells us that the TID(s) 2120 * became empty or we find that a txq became empty, we'll do the 2121 * TIM recalculation. 2122 */ 2123 2124 for (tid = 0; tid < ARRAY_SIZE(sta->sta.txq); tid++) { 2125 if (!sta->sta.txq[tid] || 2126 !(driver_release_tids & BIT(tid)) || 2127 txq_has_queue(sta->sta.txq[tid])) 2128 continue; 2129 2130 sta_info_recalc_tim(sta); 2131 break; 2132 } 2133 } 2134 } 2135 2136 void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta) 2137 { 2138 u8 ignore_for_response = sta->sta.uapsd_queues; 2139 2140 /* 2141 * If all ACs are delivery-enabled then we should reply 2142 * from any of them, if only some are enabled we reply 2143 * only from the non-enabled ones. 2144 */ 2145 if (ignore_for_response == BIT(IEEE80211_NUM_ACS) - 1) 2146 ignore_for_response = 0; 2147 2148 ieee80211_sta_ps_deliver_response(sta, 1, ignore_for_response, 2149 IEEE80211_FRAME_RELEASE_PSPOLL); 2150 } 2151 2152 void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta) 2153 { 2154 int n_frames = sta->sta.max_sp; 2155 u8 delivery_enabled = sta->sta.uapsd_queues; 2156 2157 /* 2158 * If we ever grow support for TSPEC this might happen if 2159 * the TSPEC update from hostapd comes in between a trigger 2160 * frame setting WLAN_STA_UAPSD in the RX path and this 2161 * actually getting called. 2162 */ 2163 if (!delivery_enabled) 2164 return; 2165 2166 switch (sta->sta.max_sp) { 2167 case 1: 2168 n_frames = 2; 2169 break; 2170 case 2: 2171 n_frames = 4; 2172 break; 2173 case 3: 2174 n_frames = 6; 2175 break; 2176 case 0: 2177 /* XXX: what is a good value? */ 2178 n_frames = 128; 2179 break; 2180 } 2181 2182 ieee80211_sta_ps_deliver_response(sta, n_frames, ~delivery_enabled, 2183 IEEE80211_FRAME_RELEASE_UAPSD); 2184 } 2185 2186 void ieee80211_sta_block_awake(struct ieee80211_hw *hw, 2187 struct ieee80211_sta *pubsta, bool block) 2188 { 2189 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 2190 2191 trace_api_sta_block_awake(sta->local, pubsta, block); 2192 2193 if (block) { 2194 set_sta_flag(sta, WLAN_STA_PS_DRIVER); 2195 ieee80211_clear_fast_xmit(sta); 2196 return; 2197 } 2198 2199 if (!test_sta_flag(sta, WLAN_STA_PS_DRIVER)) 2200 return; 2201 2202 if (!test_sta_flag(sta, WLAN_STA_PS_STA)) { 2203 set_sta_flag(sta, WLAN_STA_PS_DELIVER); 2204 clear_sta_flag(sta, WLAN_STA_PS_DRIVER); 2205 ieee80211_queue_work(hw, &sta->drv_deliver_wk); 2206 } else if (test_sta_flag(sta, WLAN_STA_PSPOLL) || 2207 test_sta_flag(sta, WLAN_STA_UAPSD)) { 2208 /* must be asleep in this case */ 2209 clear_sta_flag(sta, WLAN_STA_PS_DRIVER); 2210 ieee80211_queue_work(hw, &sta->drv_deliver_wk); 2211 } else { 2212 clear_sta_flag(sta, WLAN_STA_PS_DRIVER); 2213 ieee80211_check_fast_xmit(sta); 2214 } 2215 } 2216 EXPORT_SYMBOL(ieee80211_sta_block_awake); 2217 2218 void ieee80211_sta_eosp(struct ieee80211_sta *pubsta) 2219 { 2220 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 2221 struct ieee80211_local *local = sta->local; 2222 2223 trace_api_eosp(local, pubsta); 2224 2225 clear_sta_flag(sta, WLAN_STA_SP); 2226 } 2227 EXPORT_SYMBOL(ieee80211_sta_eosp); 2228 2229 void ieee80211_send_eosp_nullfunc(struct ieee80211_sta *pubsta, int tid) 2230 { 2231 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 2232 enum ieee80211_frame_release_type reason; 2233 bool more_data; 2234 2235 trace_api_send_eosp_nullfunc(sta->local, pubsta, tid); 2236 2237 reason = IEEE80211_FRAME_RELEASE_UAPSD; 2238 more_data = ieee80211_sta_ps_more_data(sta, ~sta->sta.uapsd_queues, 2239 reason, 0); 2240 2241 ieee80211_send_null_response(sta, tid, reason, false, more_data); 2242 } 2243 EXPORT_SYMBOL(ieee80211_send_eosp_nullfunc); 2244 2245 void ieee80211_sta_set_buffered(struct ieee80211_sta *pubsta, 2246 u8 tid, bool buffered) 2247 { 2248 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 2249 2250 if (WARN_ON(tid >= IEEE80211_NUM_TIDS)) 2251 return; 2252 2253 trace_api_sta_set_buffered(sta->local, pubsta, tid, buffered); 2254 2255 if (buffered) 2256 set_bit(tid, &sta->driver_buffered_tids); 2257 else 2258 clear_bit(tid, &sta->driver_buffered_tids); 2259 2260 sta_info_recalc_tim(sta); 2261 } 2262 EXPORT_SYMBOL(ieee80211_sta_set_buffered); 2263 2264 void ieee80211_sta_register_airtime(struct ieee80211_sta *pubsta, u8 tid, 2265 u32 tx_airtime, u32 rx_airtime) 2266 { 2267 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 2268 struct ieee80211_local *local = sta->sdata->local; 2269 u8 ac = ieee80211_ac_from_tid(tid); 2270 u32 airtime = 0; 2271 u32 diff; 2272 2273 if (sta->local->airtime_flags & AIRTIME_USE_TX) 2274 airtime += tx_airtime; 2275 if (sta->local->airtime_flags & AIRTIME_USE_RX) 2276 airtime += rx_airtime; 2277 2278 spin_lock_bh(&local->active_txq_lock[ac]); 2279 sta->airtime[ac].tx_airtime += tx_airtime; 2280 sta->airtime[ac].rx_airtime += rx_airtime; 2281 2282 diff = (u32)jiffies - sta->airtime[ac].last_active; 2283 if (diff <= AIRTIME_ACTIVE_DURATION) 2284 sta->airtime[ac].deficit -= airtime; 2285 2286 spin_unlock_bh(&local->active_txq_lock[ac]); 2287 } 2288 EXPORT_SYMBOL(ieee80211_sta_register_airtime); 2289 2290 void __ieee80211_sta_recalc_aggregates(struct sta_info *sta, u16 active_links) 2291 { 2292 bool first = true; 2293 int link_id; 2294 2295 if (!sta->sta.valid_links || !sta->sta.mlo) { 2296 sta->sta.cur = &sta->sta.deflink.agg; 2297 return; 2298 } 2299 2300 rcu_read_lock(); 2301 for (link_id = 0; link_id < ARRAY_SIZE((sta)->link); link_id++) { 2302 struct ieee80211_link_sta *link_sta; 2303 int i; 2304 2305 if (!(active_links & BIT(link_id))) 2306 continue; 2307 2308 link_sta = rcu_dereference(sta->sta.link[link_id]); 2309 if (!link_sta) 2310 continue; 2311 2312 if (first) { 2313 sta->cur = sta->sta.deflink.agg; 2314 first = false; 2315 continue; 2316 } 2317 2318 sta->cur.max_amsdu_len = 2319 min(sta->cur.max_amsdu_len, 2320 link_sta->agg.max_amsdu_len); 2321 sta->cur.max_rc_amsdu_len = 2322 min(sta->cur.max_rc_amsdu_len, 2323 link_sta->agg.max_rc_amsdu_len); 2324 2325 for (i = 0; i < ARRAY_SIZE(sta->cur.max_tid_amsdu_len); i++) 2326 sta->cur.max_tid_amsdu_len[i] = 2327 min(sta->cur.max_tid_amsdu_len[i], 2328 link_sta->agg.max_tid_amsdu_len[i]); 2329 } 2330 rcu_read_unlock(); 2331 2332 sta->sta.cur = &sta->cur; 2333 } 2334 2335 void ieee80211_sta_recalc_aggregates(struct ieee80211_sta *pubsta) 2336 { 2337 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 2338 2339 __ieee80211_sta_recalc_aggregates(sta, sta->sdata->vif.active_links); 2340 } 2341 EXPORT_SYMBOL(ieee80211_sta_recalc_aggregates); 2342 2343 void ieee80211_sta_update_pending_airtime(struct ieee80211_local *local, 2344 struct sta_info *sta, u8 ac, 2345 u16 tx_airtime, bool tx_completed) 2346 { 2347 int tx_pending; 2348 2349 if (!wiphy_ext_feature_isset(local->hw.wiphy, NL80211_EXT_FEATURE_AQL)) 2350 return; 2351 2352 if (!tx_completed) { 2353 if (sta) 2354 atomic_add(tx_airtime, 2355 &sta->airtime[ac].aql_tx_pending); 2356 2357 atomic_add(tx_airtime, &local->aql_total_pending_airtime); 2358 atomic_add(tx_airtime, &local->aql_ac_pending_airtime[ac]); 2359 return; 2360 } 2361 2362 if (sta) { 2363 tx_pending = atomic_sub_return(tx_airtime, 2364 &sta->airtime[ac].aql_tx_pending); 2365 if (tx_pending < 0) 2366 atomic_cmpxchg(&sta->airtime[ac].aql_tx_pending, 2367 tx_pending, 0); 2368 } 2369 2370 atomic_sub(tx_airtime, &local->aql_total_pending_airtime); 2371 tx_pending = atomic_sub_return(tx_airtime, 2372 &local->aql_ac_pending_airtime[ac]); 2373 if (WARN_ONCE(tx_pending < 0, 2374 "Device %s AC %d pending airtime underflow: %u, %u", 2375 wiphy_name(local->hw.wiphy), ac, tx_pending, 2376 tx_airtime)) { 2377 atomic_cmpxchg(&local->aql_ac_pending_airtime[ac], 2378 tx_pending, 0); 2379 atomic_sub(tx_pending, &local->aql_total_pending_airtime); 2380 } 2381 } 2382 2383 static struct ieee80211_sta_rx_stats * 2384 sta_get_last_rx_stats(struct sta_info *sta) 2385 { 2386 struct ieee80211_sta_rx_stats *stats = &sta->deflink.rx_stats; 2387 int cpu; 2388 2389 if (!sta->deflink.pcpu_rx_stats) 2390 return stats; 2391 2392 for_each_possible_cpu(cpu) { 2393 struct ieee80211_sta_rx_stats *cpustats; 2394 2395 cpustats = per_cpu_ptr(sta->deflink.pcpu_rx_stats, cpu); 2396 2397 if (time_after(cpustats->last_rx, stats->last_rx)) 2398 stats = cpustats; 2399 } 2400 2401 return stats; 2402 } 2403 2404 static void sta_stats_decode_rate(struct ieee80211_local *local, u32 rate, 2405 struct rate_info *rinfo) 2406 { 2407 rinfo->bw = STA_STATS_GET(BW, rate); 2408 2409 switch (STA_STATS_GET(TYPE, rate)) { 2410 case STA_STATS_RATE_TYPE_VHT: 2411 rinfo->flags = RATE_INFO_FLAGS_VHT_MCS; 2412 rinfo->mcs = STA_STATS_GET(VHT_MCS, rate); 2413 rinfo->nss = STA_STATS_GET(VHT_NSS, rate); 2414 if (STA_STATS_GET(SGI, rate)) 2415 rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI; 2416 break; 2417 case STA_STATS_RATE_TYPE_HT: 2418 rinfo->flags = RATE_INFO_FLAGS_MCS; 2419 rinfo->mcs = STA_STATS_GET(HT_MCS, rate); 2420 if (STA_STATS_GET(SGI, rate)) 2421 rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI; 2422 break; 2423 case STA_STATS_RATE_TYPE_LEGACY: { 2424 struct ieee80211_supported_band *sband; 2425 u16 brate; 2426 unsigned int shift; 2427 int band = STA_STATS_GET(LEGACY_BAND, rate); 2428 int rate_idx = STA_STATS_GET(LEGACY_IDX, rate); 2429 2430 sband = local->hw.wiphy->bands[band]; 2431 2432 if (WARN_ON_ONCE(!sband->bitrates)) 2433 break; 2434 2435 brate = sband->bitrates[rate_idx].bitrate; 2436 if (rinfo->bw == RATE_INFO_BW_5) 2437 shift = 2; 2438 else if (rinfo->bw == RATE_INFO_BW_10) 2439 shift = 1; 2440 else 2441 shift = 0; 2442 rinfo->legacy = DIV_ROUND_UP(brate, 1 << shift); 2443 break; 2444 } 2445 case STA_STATS_RATE_TYPE_HE: 2446 rinfo->flags = RATE_INFO_FLAGS_HE_MCS; 2447 rinfo->mcs = STA_STATS_GET(HE_MCS, rate); 2448 rinfo->nss = STA_STATS_GET(HE_NSS, rate); 2449 rinfo->he_gi = STA_STATS_GET(HE_GI, rate); 2450 rinfo->he_ru_alloc = STA_STATS_GET(HE_RU, rate); 2451 rinfo->he_dcm = STA_STATS_GET(HE_DCM, rate); 2452 break; 2453 case STA_STATS_RATE_TYPE_EHT: 2454 rinfo->flags = RATE_INFO_FLAGS_EHT_MCS; 2455 rinfo->mcs = STA_STATS_GET(EHT_MCS, rate); 2456 rinfo->nss = STA_STATS_GET(EHT_NSS, rate); 2457 rinfo->eht_gi = STA_STATS_GET(EHT_GI, rate); 2458 rinfo->eht_ru_alloc = STA_STATS_GET(EHT_RU, rate); 2459 break; 2460 } 2461 } 2462 2463 static int sta_set_rate_info_rx(struct sta_info *sta, struct rate_info *rinfo) 2464 { 2465 u32 rate = READ_ONCE(sta_get_last_rx_stats(sta)->last_rate); 2466 2467 if (rate == STA_STATS_RATE_INVALID) 2468 return -EINVAL; 2469 2470 sta_stats_decode_rate(sta->local, rate, rinfo); 2471 return 0; 2472 } 2473 2474 static inline u64 sta_get_tidstats_msdu(struct ieee80211_sta_rx_stats *rxstats, 2475 int tid) 2476 { 2477 unsigned int start; 2478 u64 value; 2479 2480 do { 2481 start = u64_stats_fetch_begin(&rxstats->syncp); 2482 value = rxstats->msdu[tid]; 2483 } while (u64_stats_fetch_retry(&rxstats->syncp, start)); 2484 2485 return value; 2486 } 2487 2488 static void sta_set_tidstats(struct sta_info *sta, 2489 struct cfg80211_tid_stats *tidstats, 2490 int tid) 2491 { 2492 struct ieee80211_local *local = sta->local; 2493 int cpu; 2494 2495 if (!(tidstats->filled & BIT(NL80211_TID_STATS_RX_MSDU))) { 2496 tidstats->rx_msdu += sta_get_tidstats_msdu(&sta->deflink.rx_stats, 2497 tid); 2498 2499 if (sta->deflink.pcpu_rx_stats) { 2500 for_each_possible_cpu(cpu) { 2501 struct ieee80211_sta_rx_stats *cpurxs; 2502 2503 cpurxs = per_cpu_ptr(sta->deflink.pcpu_rx_stats, 2504 cpu); 2505 tidstats->rx_msdu += 2506 sta_get_tidstats_msdu(cpurxs, tid); 2507 } 2508 } 2509 2510 tidstats->filled |= BIT(NL80211_TID_STATS_RX_MSDU); 2511 } 2512 2513 if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU))) { 2514 tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU); 2515 tidstats->tx_msdu = sta->deflink.tx_stats.msdu[tid]; 2516 } 2517 2518 if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU_RETRIES)) && 2519 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 2520 tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU_RETRIES); 2521 tidstats->tx_msdu_retries = sta->deflink.status_stats.msdu_retries[tid]; 2522 } 2523 2524 if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU_FAILED)) && 2525 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 2526 tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU_FAILED); 2527 tidstats->tx_msdu_failed = sta->deflink.status_stats.msdu_failed[tid]; 2528 } 2529 2530 if (tid < IEEE80211_NUM_TIDS) { 2531 spin_lock_bh(&local->fq.lock); 2532 rcu_read_lock(); 2533 2534 tidstats->filled |= BIT(NL80211_TID_STATS_TXQ_STATS); 2535 ieee80211_fill_txq_stats(&tidstats->txq_stats, 2536 to_txq_info(sta->sta.txq[tid])); 2537 2538 rcu_read_unlock(); 2539 spin_unlock_bh(&local->fq.lock); 2540 } 2541 } 2542 2543 static inline u64 sta_get_stats_bytes(struct ieee80211_sta_rx_stats *rxstats) 2544 { 2545 unsigned int start; 2546 u64 value; 2547 2548 do { 2549 start = u64_stats_fetch_begin(&rxstats->syncp); 2550 value = rxstats->bytes; 2551 } while (u64_stats_fetch_retry(&rxstats->syncp, start)); 2552 2553 return value; 2554 } 2555 2556 void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo, 2557 bool tidstats) 2558 { 2559 struct ieee80211_sub_if_data *sdata = sta->sdata; 2560 struct ieee80211_local *local = sdata->local; 2561 u32 thr = 0; 2562 int i, ac, cpu; 2563 struct ieee80211_sta_rx_stats *last_rxstats; 2564 2565 last_rxstats = sta_get_last_rx_stats(sta); 2566 2567 sinfo->generation = sdata->local->sta_generation; 2568 2569 /* do before driver, so beacon filtering drivers have a 2570 * chance to e.g. just add the number of filtered beacons 2571 * (or just modify the value entirely, of course) 2572 */ 2573 if (sdata->vif.type == NL80211_IFTYPE_STATION) 2574 sinfo->rx_beacon = sdata->deflink.u.mgd.count_beacon_signal; 2575 2576 drv_sta_statistics(local, sdata, &sta->sta, sinfo); 2577 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_INACTIVE_TIME) | 2578 BIT_ULL(NL80211_STA_INFO_STA_FLAGS) | 2579 BIT_ULL(NL80211_STA_INFO_BSS_PARAM) | 2580 BIT_ULL(NL80211_STA_INFO_CONNECTED_TIME) | 2581 BIT_ULL(NL80211_STA_INFO_ASSOC_AT_BOOTTIME) | 2582 BIT_ULL(NL80211_STA_INFO_RX_DROP_MISC); 2583 2584 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 2585 sinfo->beacon_loss_count = 2586 sdata->deflink.u.mgd.beacon_loss_count; 2587 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_BEACON_LOSS); 2588 } 2589 2590 sinfo->connected_time = ktime_get_seconds() - sta->last_connected; 2591 sinfo->assoc_at = sta->assoc_at; 2592 sinfo->inactive_time = 2593 jiffies_to_msecs(jiffies - ieee80211_sta_last_active(sta)); 2594 2595 if (!(sinfo->filled & (BIT_ULL(NL80211_STA_INFO_TX_BYTES64) | 2596 BIT_ULL(NL80211_STA_INFO_TX_BYTES)))) { 2597 sinfo->tx_bytes = 0; 2598 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 2599 sinfo->tx_bytes += sta->deflink.tx_stats.bytes[ac]; 2600 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_BYTES64); 2601 } 2602 2603 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_PACKETS))) { 2604 sinfo->tx_packets = 0; 2605 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 2606 sinfo->tx_packets += sta->deflink.tx_stats.packets[ac]; 2607 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_PACKETS); 2608 } 2609 2610 if (!(sinfo->filled & (BIT_ULL(NL80211_STA_INFO_RX_BYTES64) | 2611 BIT_ULL(NL80211_STA_INFO_RX_BYTES)))) { 2612 sinfo->rx_bytes += sta_get_stats_bytes(&sta->deflink.rx_stats); 2613 2614 if (sta->deflink.pcpu_rx_stats) { 2615 for_each_possible_cpu(cpu) { 2616 struct ieee80211_sta_rx_stats *cpurxs; 2617 2618 cpurxs = per_cpu_ptr(sta->deflink.pcpu_rx_stats, 2619 cpu); 2620 sinfo->rx_bytes += sta_get_stats_bytes(cpurxs); 2621 } 2622 } 2623 2624 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_BYTES64); 2625 } 2626 2627 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_RX_PACKETS))) { 2628 sinfo->rx_packets = sta->deflink.rx_stats.packets; 2629 if (sta->deflink.pcpu_rx_stats) { 2630 for_each_possible_cpu(cpu) { 2631 struct ieee80211_sta_rx_stats *cpurxs; 2632 2633 cpurxs = per_cpu_ptr(sta->deflink.pcpu_rx_stats, 2634 cpu); 2635 sinfo->rx_packets += cpurxs->packets; 2636 } 2637 } 2638 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_PACKETS); 2639 } 2640 2641 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_RETRIES))) { 2642 sinfo->tx_retries = sta->deflink.status_stats.retry_count; 2643 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_RETRIES); 2644 } 2645 2646 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_FAILED))) { 2647 sinfo->tx_failed = sta->deflink.status_stats.retry_failed; 2648 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_FAILED); 2649 } 2650 2651 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_RX_DURATION))) { 2652 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 2653 sinfo->rx_duration += sta->airtime[ac].rx_airtime; 2654 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_DURATION); 2655 } 2656 2657 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_DURATION))) { 2658 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 2659 sinfo->tx_duration += sta->airtime[ac].tx_airtime; 2660 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_DURATION); 2661 } 2662 2663 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_AIRTIME_WEIGHT))) { 2664 sinfo->airtime_weight = sta->airtime_weight; 2665 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_AIRTIME_WEIGHT); 2666 } 2667 2668 sinfo->rx_dropped_misc = sta->deflink.rx_stats.dropped; 2669 if (sta->deflink.pcpu_rx_stats) { 2670 for_each_possible_cpu(cpu) { 2671 struct ieee80211_sta_rx_stats *cpurxs; 2672 2673 cpurxs = per_cpu_ptr(sta->deflink.pcpu_rx_stats, cpu); 2674 sinfo->rx_dropped_misc += cpurxs->dropped; 2675 } 2676 } 2677 2678 if (sdata->vif.type == NL80211_IFTYPE_STATION && 2679 !(sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)) { 2680 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_BEACON_RX) | 2681 BIT_ULL(NL80211_STA_INFO_BEACON_SIGNAL_AVG); 2682 sinfo->rx_beacon_signal_avg = ieee80211_ave_rssi(&sdata->vif); 2683 } 2684 2685 if (ieee80211_hw_check(&sta->local->hw, SIGNAL_DBM) || 2686 ieee80211_hw_check(&sta->local->hw, SIGNAL_UNSPEC)) { 2687 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_SIGNAL))) { 2688 sinfo->signal = (s8)last_rxstats->last_signal; 2689 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_SIGNAL); 2690 } 2691 2692 if (!sta->deflink.pcpu_rx_stats && 2693 !(sinfo->filled & BIT_ULL(NL80211_STA_INFO_SIGNAL_AVG))) { 2694 sinfo->signal_avg = 2695 -ewma_signal_read(&sta->deflink.rx_stats_avg.signal); 2696 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_SIGNAL_AVG); 2697 } 2698 } 2699 2700 /* for the average - if pcpu_rx_stats isn't set - rxstats must point to 2701 * the sta->rx_stats struct, so the check here is fine with and without 2702 * pcpu statistics 2703 */ 2704 if (last_rxstats->chains && 2705 !(sinfo->filled & (BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL) | 2706 BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL_AVG)))) { 2707 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL); 2708 if (!sta->deflink.pcpu_rx_stats) 2709 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL_AVG); 2710 2711 sinfo->chains = last_rxstats->chains; 2712 2713 for (i = 0; i < ARRAY_SIZE(sinfo->chain_signal); i++) { 2714 sinfo->chain_signal[i] = 2715 last_rxstats->chain_signal_last[i]; 2716 sinfo->chain_signal_avg[i] = 2717 -ewma_signal_read(&sta->deflink.rx_stats_avg.chain_signal[i]); 2718 } 2719 } 2720 2721 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_BITRATE)) && 2722 !sta->sta.valid_links && 2723 ieee80211_rate_valid(&sta->deflink.tx_stats.last_rate)) { 2724 sta_set_rate_info_tx(sta, &sta->deflink.tx_stats.last_rate, 2725 &sinfo->txrate); 2726 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_BITRATE); 2727 } 2728 2729 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_RX_BITRATE)) && 2730 !sta->sta.valid_links) { 2731 if (sta_set_rate_info_rx(sta, &sinfo->rxrate) == 0) 2732 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_BITRATE); 2733 } 2734 2735 if (tidstats && !cfg80211_sinfo_alloc_tid_stats(sinfo, GFP_KERNEL)) { 2736 for (i = 0; i < IEEE80211_NUM_TIDS + 1; i++) 2737 sta_set_tidstats(sta, &sinfo->pertid[i], i); 2738 } 2739 2740 if (ieee80211_vif_is_mesh(&sdata->vif)) { 2741 #ifdef CONFIG_MAC80211_MESH 2742 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_LLID) | 2743 BIT_ULL(NL80211_STA_INFO_PLID) | 2744 BIT_ULL(NL80211_STA_INFO_PLINK_STATE) | 2745 BIT_ULL(NL80211_STA_INFO_LOCAL_PM) | 2746 BIT_ULL(NL80211_STA_INFO_PEER_PM) | 2747 BIT_ULL(NL80211_STA_INFO_NONPEER_PM) | 2748 BIT_ULL(NL80211_STA_INFO_CONNECTED_TO_GATE) | 2749 BIT_ULL(NL80211_STA_INFO_CONNECTED_TO_AS); 2750 2751 sinfo->llid = sta->mesh->llid; 2752 sinfo->plid = sta->mesh->plid; 2753 sinfo->plink_state = sta->mesh->plink_state; 2754 if (test_sta_flag(sta, WLAN_STA_TOFFSET_KNOWN)) { 2755 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_T_OFFSET); 2756 sinfo->t_offset = sta->mesh->t_offset; 2757 } 2758 sinfo->local_pm = sta->mesh->local_pm; 2759 sinfo->peer_pm = sta->mesh->peer_pm; 2760 sinfo->nonpeer_pm = sta->mesh->nonpeer_pm; 2761 sinfo->connected_to_gate = sta->mesh->connected_to_gate; 2762 sinfo->connected_to_as = sta->mesh->connected_to_as; 2763 #endif 2764 } 2765 2766 sinfo->bss_param.flags = 0; 2767 if (sdata->vif.bss_conf.use_cts_prot) 2768 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_CTS_PROT; 2769 if (sdata->vif.bss_conf.use_short_preamble) 2770 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_PREAMBLE; 2771 if (sdata->vif.bss_conf.use_short_slot) 2772 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_SLOT_TIME; 2773 sinfo->bss_param.dtim_period = sdata->vif.bss_conf.dtim_period; 2774 sinfo->bss_param.beacon_interval = sdata->vif.bss_conf.beacon_int; 2775 2776 sinfo->sta_flags.set = 0; 2777 sinfo->sta_flags.mask = BIT(NL80211_STA_FLAG_AUTHORIZED) | 2778 BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) | 2779 BIT(NL80211_STA_FLAG_WME) | 2780 BIT(NL80211_STA_FLAG_MFP) | 2781 BIT(NL80211_STA_FLAG_AUTHENTICATED) | 2782 BIT(NL80211_STA_FLAG_ASSOCIATED) | 2783 BIT(NL80211_STA_FLAG_TDLS_PEER); 2784 if (test_sta_flag(sta, WLAN_STA_AUTHORIZED)) 2785 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHORIZED); 2786 if (test_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE)) 2787 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE); 2788 if (sta->sta.wme) 2789 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_WME); 2790 if (test_sta_flag(sta, WLAN_STA_MFP)) 2791 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_MFP); 2792 if (test_sta_flag(sta, WLAN_STA_AUTH)) 2793 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHENTICATED); 2794 if (test_sta_flag(sta, WLAN_STA_ASSOC)) 2795 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_ASSOCIATED); 2796 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER)) 2797 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_TDLS_PEER); 2798 2799 thr = sta_get_expected_throughput(sta); 2800 2801 if (thr != 0) { 2802 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_EXPECTED_THROUGHPUT); 2803 sinfo->expected_throughput = thr; 2804 } 2805 2806 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL)) && 2807 sta->deflink.status_stats.ack_signal_filled) { 2808 sinfo->ack_signal = sta->deflink.status_stats.last_ack_signal; 2809 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL); 2810 } 2811 2812 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL_AVG)) && 2813 sta->deflink.status_stats.ack_signal_filled) { 2814 sinfo->avg_ack_signal = 2815 -(s8)ewma_avg_signal_read( 2816 &sta->deflink.status_stats.avg_ack_signal); 2817 sinfo->filled |= 2818 BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL_AVG); 2819 } 2820 2821 if (ieee80211_vif_is_mesh(&sdata->vif)) { 2822 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_AIRTIME_LINK_METRIC); 2823 sinfo->airtime_link_metric = 2824 airtime_link_metric_get(local, sta); 2825 } 2826 } 2827 2828 u32 sta_get_expected_throughput(struct sta_info *sta) 2829 { 2830 struct ieee80211_sub_if_data *sdata = sta->sdata; 2831 struct ieee80211_local *local = sdata->local; 2832 struct rate_control_ref *ref = NULL; 2833 u32 thr = 0; 2834 2835 if (test_sta_flag(sta, WLAN_STA_RATE_CONTROL)) 2836 ref = local->rate_ctrl; 2837 2838 /* check if the driver has a SW RC implementation */ 2839 if (ref && ref->ops->get_expected_throughput) 2840 thr = ref->ops->get_expected_throughput(sta->rate_ctrl_priv); 2841 else 2842 thr = drv_get_expected_throughput(local, sta); 2843 2844 return thr; 2845 } 2846 2847 unsigned long ieee80211_sta_last_active(struct sta_info *sta) 2848 { 2849 struct ieee80211_sta_rx_stats *stats = sta_get_last_rx_stats(sta); 2850 2851 if (!sta->deflink.status_stats.last_ack || 2852 time_after(stats->last_rx, sta->deflink.status_stats.last_ack)) 2853 return stats->last_rx; 2854 return sta->deflink.status_stats.last_ack; 2855 } 2856 2857 static void sta_update_codel_params(struct sta_info *sta, u32 thr) 2858 { 2859 if (thr && thr < STA_SLOW_THRESHOLD * sta->local->num_sta) { 2860 sta->cparams.target = MS2TIME(50); 2861 sta->cparams.interval = MS2TIME(300); 2862 sta->cparams.ecn = false; 2863 } else { 2864 sta->cparams.target = MS2TIME(20); 2865 sta->cparams.interval = MS2TIME(100); 2866 sta->cparams.ecn = true; 2867 } 2868 } 2869 2870 void ieee80211_sta_set_expected_throughput(struct ieee80211_sta *pubsta, 2871 u32 thr) 2872 { 2873 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 2874 2875 sta_update_codel_params(sta, thr); 2876 } 2877 2878 int ieee80211_sta_allocate_link(struct sta_info *sta, unsigned int link_id) 2879 { 2880 struct ieee80211_sub_if_data *sdata = sta->sdata; 2881 struct sta_link_alloc *alloc; 2882 int ret; 2883 2884 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2885 2886 WARN_ON(!test_sta_flag(sta, WLAN_STA_INSERTED)); 2887 2888 /* must represent an MLD from the start */ 2889 if (WARN_ON(!sta->sta.valid_links)) 2890 return -EINVAL; 2891 2892 if (WARN_ON(sta->sta.valid_links & BIT(link_id) || 2893 sta->link[link_id])) 2894 return -EBUSY; 2895 2896 alloc = kzalloc(sizeof(*alloc), GFP_KERNEL); 2897 if (!alloc) 2898 return -ENOMEM; 2899 2900 ret = sta_info_alloc_link(sdata->local, &alloc->info, GFP_KERNEL); 2901 if (ret) { 2902 kfree(alloc); 2903 return ret; 2904 } 2905 2906 sta_info_add_link(sta, link_id, &alloc->info, &alloc->sta); 2907 2908 ieee80211_link_sta_debugfs_add(&alloc->info); 2909 2910 return 0; 2911 } 2912 2913 void ieee80211_sta_free_link(struct sta_info *sta, unsigned int link_id) 2914 { 2915 lockdep_assert_wiphy(sta->sdata->local->hw.wiphy); 2916 2917 WARN_ON(!test_sta_flag(sta, WLAN_STA_INSERTED)); 2918 2919 sta_remove_link(sta, link_id, false); 2920 } 2921 2922 int ieee80211_sta_activate_link(struct sta_info *sta, unsigned int link_id) 2923 { 2924 struct ieee80211_sub_if_data *sdata = sta->sdata; 2925 struct link_sta_info *link_sta; 2926 u16 old_links = sta->sta.valid_links; 2927 u16 new_links = old_links | BIT(link_id); 2928 int ret; 2929 2930 link_sta = rcu_dereference_protected(sta->link[link_id], 2931 lockdep_is_held(&sdata->local->hw.wiphy->mtx)); 2932 2933 if (WARN_ON(old_links == new_links || !link_sta)) 2934 return -EINVAL; 2935 2936 rcu_read_lock(); 2937 if (link_sta_info_hash_lookup(sdata->local, link_sta->addr)) { 2938 rcu_read_unlock(); 2939 return -EALREADY; 2940 } 2941 /* we only modify under the mutex so this is fine */ 2942 rcu_read_unlock(); 2943 2944 sta->sta.valid_links = new_links; 2945 2946 if (WARN_ON(!test_sta_flag(sta, WLAN_STA_INSERTED))) 2947 goto hash; 2948 2949 ieee80211_recalc_min_chandef(sdata, link_id); 2950 2951 /* Ensure the values are updated for the driver, 2952 * redone by sta_remove_link on failure. 2953 */ 2954 ieee80211_sta_recalc_aggregates(&sta->sta); 2955 2956 ret = drv_change_sta_links(sdata->local, sdata, &sta->sta, 2957 old_links, new_links); 2958 if (ret) { 2959 sta->sta.valid_links = old_links; 2960 sta_remove_link(sta, link_id, false); 2961 return ret; 2962 } 2963 2964 hash: 2965 ret = link_sta_info_hash_add(sdata->local, link_sta); 2966 WARN_ON(ret); 2967 return 0; 2968 } 2969 2970 void ieee80211_sta_remove_link(struct sta_info *sta, unsigned int link_id) 2971 { 2972 struct ieee80211_sub_if_data *sdata = sta->sdata; 2973 u16 old_links = sta->sta.valid_links; 2974 2975 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2976 2977 sta->sta.valid_links &= ~BIT(link_id); 2978 2979 if (!WARN_ON(!test_sta_flag(sta, WLAN_STA_INSERTED))) 2980 drv_change_sta_links(sdata->local, sdata, &sta->sta, 2981 old_links, sta->sta.valid_links); 2982 2983 sta_remove_link(sta, link_id, true); 2984 } 2985 2986 void ieee80211_sta_set_max_amsdu_subframes(struct sta_info *sta, 2987 const u8 *ext_capab, 2988 unsigned int ext_capab_len) 2989 { 2990 u8 val; 2991 2992 sta->sta.max_amsdu_subframes = 0; 2993 2994 if (ext_capab_len < 8) 2995 return; 2996 2997 /* The sender might not have sent the last bit, consider it to be 0 */ 2998 val = u8_get_bits(ext_capab[7], WLAN_EXT_CAPA8_MAX_MSDU_IN_AMSDU_LSB); 2999 3000 /* we did get all the bits, take the MSB as well */ 3001 if (ext_capab_len >= 9) 3002 val |= u8_get_bits(ext_capab[8], 3003 WLAN_EXT_CAPA9_MAX_MSDU_IN_AMSDU_MSB) << 1; 3004 3005 if (val) 3006 sta->sta.max_amsdu_subframes = 4 << (4 - val); 3007 } 3008 3009 #ifdef CONFIG_LOCKDEP 3010 bool lockdep_sta_mutex_held(struct ieee80211_sta *pubsta) 3011 { 3012 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 3013 3014 return lockdep_is_held(&sta->local->hw.wiphy->mtx); 3015 } 3016 EXPORT_SYMBOL(lockdep_sta_mutex_held); 3017 #endif 3018