1 /* 2 * Copyright 2002-2005, Instant802 Networks, Inc. 3 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 4 * Copyright 2013-2014 Intel Mobile Communications GmbH 5 * Copyright (C) 2015 Intel Deutschland GmbH 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License version 2 as 9 * published by the Free Software Foundation. 10 */ 11 12 #include <linux/module.h> 13 #include <linux/init.h> 14 #include <linux/etherdevice.h> 15 #include <linux/netdevice.h> 16 #include <linux/types.h> 17 #include <linux/slab.h> 18 #include <linux/skbuff.h> 19 #include <linux/if_arp.h> 20 #include <linux/timer.h> 21 #include <linux/rtnetlink.h> 22 23 #include <net/mac80211.h> 24 #include "ieee80211_i.h" 25 #include "driver-ops.h" 26 #include "rate.h" 27 #include "sta_info.h" 28 #include "debugfs_sta.h" 29 #include "mesh.h" 30 #include "wme.h" 31 32 /** 33 * DOC: STA information lifetime rules 34 * 35 * STA info structures (&struct sta_info) are managed in a hash table 36 * for faster lookup and a list for iteration. They are managed using 37 * RCU, i.e. access to the list and hash table is protected by RCU. 38 * 39 * Upon allocating a STA info structure with sta_info_alloc(), the caller 40 * owns that structure. It must then insert it into the hash table using 41 * either sta_info_insert() or sta_info_insert_rcu(); only in the latter 42 * case (which acquires an rcu read section but must not be called from 43 * within one) will the pointer still be valid after the call. Note that 44 * the caller may not do much with the STA info before inserting it, in 45 * particular, it may not start any mesh peer link management or add 46 * encryption keys. 47 * 48 * When the insertion fails (sta_info_insert()) returns non-zero), the 49 * structure will have been freed by sta_info_insert()! 50 * 51 * Station entries are added by mac80211 when you establish a link with a 52 * peer. This means different things for the different type of interfaces 53 * we support. For a regular station this mean we add the AP sta when we 54 * receive an association response from the AP. For IBSS this occurs when 55 * get to know about a peer on the same IBSS. For WDS we add the sta for 56 * the peer immediately upon device open. When using AP mode we add stations 57 * for each respective station upon request from userspace through nl80211. 58 * 59 * In order to remove a STA info structure, various sta_info_destroy_*() 60 * calls are available. 61 * 62 * There is no concept of ownership on a STA entry, each structure is 63 * owned by the global hash table/list until it is removed. All users of 64 * the structure need to be RCU protected so that the structure won't be 65 * freed before they are done using it. 66 */ 67 68 static const struct rhashtable_params sta_rht_params = { 69 .nelem_hint = 3, /* start small */ 70 .insecure_elasticity = true, /* Disable chain-length checks. */ 71 .automatic_shrinking = true, 72 .head_offset = offsetof(struct sta_info, hash_node), 73 .key_offset = offsetof(struct sta_info, addr), 74 .key_len = ETH_ALEN, 75 .hashfn = sta_addr_hash, 76 .max_size = CONFIG_MAC80211_STA_HASH_MAX_SIZE, 77 }; 78 79 /* Caller must hold local->sta_mtx */ 80 static int sta_info_hash_del(struct ieee80211_local *local, 81 struct sta_info *sta) 82 { 83 return rhashtable_remove_fast(&local->sta_hash, &sta->hash_node, 84 sta_rht_params); 85 } 86 87 static void __cleanup_single_sta(struct sta_info *sta) 88 { 89 int ac, i; 90 struct tid_ampdu_tx *tid_tx; 91 struct ieee80211_sub_if_data *sdata = sta->sdata; 92 struct ieee80211_local *local = sdata->local; 93 struct ps_data *ps; 94 95 if (test_sta_flag(sta, WLAN_STA_PS_STA) || 96 test_sta_flag(sta, WLAN_STA_PS_DRIVER) || 97 test_sta_flag(sta, WLAN_STA_PS_DELIVER)) { 98 if (sta->sdata->vif.type == NL80211_IFTYPE_AP || 99 sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 100 ps = &sdata->bss->ps; 101 else if (ieee80211_vif_is_mesh(&sdata->vif)) 102 ps = &sdata->u.mesh.ps; 103 else 104 return; 105 106 clear_sta_flag(sta, WLAN_STA_PS_STA); 107 clear_sta_flag(sta, WLAN_STA_PS_DRIVER); 108 clear_sta_flag(sta, WLAN_STA_PS_DELIVER); 109 110 atomic_dec(&ps->num_sta_ps); 111 } 112 113 if (sta->sta.txq[0]) { 114 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) { 115 struct txq_info *txqi = to_txq_info(sta->sta.txq[i]); 116 int n = skb_queue_len(&txqi->queue); 117 118 ieee80211_purge_tx_queue(&local->hw, &txqi->queue); 119 atomic_sub(n, &sdata->txqs_len[txqi->txq.ac]); 120 txqi->byte_cnt = 0; 121 } 122 } 123 124 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 125 local->total_ps_buffered -= skb_queue_len(&sta->ps_tx_buf[ac]); 126 ieee80211_purge_tx_queue(&local->hw, &sta->ps_tx_buf[ac]); 127 ieee80211_purge_tx_queue(&local->hw, &sta->tx_filtered[ac]); 128 } 129 130 if (ieee80211_vif_is_mesh(&sdata->vif)) 131 mesh_sta_cleanup(sta); 132 133 cancel_work_sync(&sta->drv_deliver_wk); 134 135 /* 136 * Destroy aggregation state here. It would be nice to wait for the 137 * driver to finish aggregation stop and then clean up, but for now 138 * drivers have to handle aggregation stop being requested, followed 139 * directly by station destruction. 140 */ 141 for (i = 0; i < IEEE80211_NUM_TIDS; i++) { 142 kfree(sta->ampdu_mlme.tid_start_tx[i]); 143 tid_tx = rcu_dereference_raw(sta->ampdu_mlme.tid_tx[i]); 144 if (!tid_tx) 145 continue; 146 ieee80211_purge_tx_queue(&local->hw, &tid_tx->pending); 147 kfree(tid_tx); 148 } 149 } 150 151 static void cleanup_single_sta(struct sta_info *sta) 152 { 153 struct ieee80211_sub_if_data *sdata = sta->sdata; 154 struct ieee80211_local *local = sdata->local; 155 156 __cleanup_single_sta(sta); 157 sta_info_free(local, sta); 158 } 159 160 /* protected by RCU */ 161 struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata, 162 const u8 *addr) 163 { 164 struct ieee80211_local *local = sdata->local; 165 struct sta_info *sta; 166 struct rhash_head *tmp; 167 const struct bucket_table *tbl; 168 169 rcu_read_lock(); 170 tbl = rht_dereference_rcu(local->sta_hash.tbl, &local->sta_hash); 171 172 for_each_sta_info(local, tbl, addr, sta, tmp) { 173 if (sta->sdata == sdata) { 174 rcu_read_unlock(); 175 /* this is safe as the caller must already hold 176 * another rcu read section or the mutex 177 */ 178 return sta; 179 } 180 } 181 rcu_read_unlock(); 182 return NULL; 183 } 184 185 /* 186 * Get sta info either from the specified interface 187 * or from one of its vlans 188 */ 189 struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata, 190 const u8 *addr) 191 { 192 struct ieee80211_local *local = sdata->local; 193 struct sta_info *sta; 194 struct rhash_head *tmp; 195 const struct bucket_table *tbl; 196 197 rcu_read_lock(); 198 tbl = rht_dereference_rcu(local->sta_hash.tbl, &local->sta_hash); 199 200 for_each_sta_info(local, tbl, addr, sta, tmp) { 201 if (sta->sdata == sdata || 202 (sta->sdata->bss && sta->sdata->bss == sdata->bss)) { 203 rcu_read_unlock(); 204 /* this is safe as the caller must already hold 205 * another rcu read section or the mutex 206 */ 207 return sta; 208 } 209 } 210 rcu_read_unlock(); 211 return NULL; 212 } 213 214 struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata, 215 int idx) 216 { 217 struct ieee80211_local *local = sdata->local; 218 struct sta_info *sta; 219 int i = 0; 220 221 list_for_each_entry_rcu(sta, &local->sta_list, list) { 222 if (sdata != sta->sdata) 223 continue; 224 if (i < idx) { 225 ++i; 226 continue; 227 } 228 return sta; 229 } 230 231 return NULL; 232 } 233 234 /** 235 * sta_info_free - free STA 236 * 237 * @local: pointer to the global information 238 * @sta: STA info to free 239 * 240 * This function must undo everything done by sta_info_alloc() 241 * that may happen before sta_info_insert(). It may only be 242 * called when sta_info_insert() has not been attempted (and 243 * if that fails, the station is freed anyway.) 244 */ 245 void sta_info_free(struct ieee80211_local *local, struct sta_info *sta) 246 { 247 if (sta->rate_ctrl) 248 rate_control_free_sta(sta); 249 250 sta_dbg(sta->sdata, "Destroyed STA %pM\n", sta->sta.addr); 251 252 if (sta->sta.txq[0]) 253 kfree(to_txq_info(sta->sta.txq[0])); 254 kfree(rcu_dereference_raw(sta->sta.rates)); 255 #ifdef CONFIG_MAC80211_MESH 256 kfree(sta->mesh); 257 #endif 258 kfree(sta); 259 } 260 261 /* Caller must hold local->sta_mtx */ 262 static int sta_info_hash_add(struct ieee80211_local *local, 263 struct sta_info *sta) 264 { 265 return rhashtable_insert_fast(&local->sta_hash, &sta->hash_node, 266 sta_rht_params); 267 } 268 269 static void sta_deliver_ps_frames(struct work_struct *wk) 270 { 271 struct sta_info *sta; 272 273 sta = container_of(wk, struct sta_info, drv_deliver_wk); 274 275 if (sta->dead) 276 return; 277 278 local_bh_disable(); 279 if (!test_sta_flag(sta, WLAN_STA_PS_STA)) 280 ieee80211_sta_ps_deliver_wakeup(sta); 281 else if (test_and_clear_sta_flag(sta, WLAN_STA_PSPOLL)) 282 ieee80211_sta_ps_deliver_poll_response(sta); 283 else if (test_and_clear_sta_flag(sta, WLAN_STA_UAPSD)) 284 ieee80211_sta_ps_deliver_uapsd(sta); 285 local_bh_enable(); 286 } 287 288 static int sta_prepare_rate_control(struct ieee80211_local *local, 289 struct sta_info *sta, gfp_t gfp) 290 { 291 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) 292 return 0; 293 294 sta->rate_ctrl = local->rate_ctrl; 295 sta->rate_ctrl_priv = rate_control_alloc_sta(sta->rate_ctrl, 296 sta, gfp); 297 if (!sta->rate_ctrl_priv) 298 return -ENOMEM; 299 300 return 0; 301 } 302 303 struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata, 304 const u8 *addr, gfp_t gfp) 305 { 306 struct ieee80211_local *local = sdata->local; 307 struct ieee80211_hw *hw = &local->hw; 308 struct sta_info *sta; 309 int i; 310 311 sta = kzalloc(sizeof(*sta) + hw->sta_data_size, gfp); 312 if (!sta) 313 return NULL; 314 315 spin_lock_init(&sta->lock); 316 spin_lock_init(&sta->ps_lock); 317 INIT_WORK(&sta->drv_deliver_wk, sta_deliver_ps_frames); 318 INIT_WORK(&sta->ampdu_mlme.work, ieee80211_ba_session_work); 319 mutex_init(&sta->ampdu_mlme.mtx); 320 #ifdef CONFIG_MAC80211_MESH 321 if (ieee80211_vif_is_mesh(&sdata->vif)) { 322 sta->mesh = kzalloc(sizeof(*sta->mesh), gfp); 323 if (!sta->mesh) 324 goto free; 325 spin_lock_init(&sta->mesh->plink_lock); 326 if (ieee80211_vif_is_mesh(&sdata->vif) && 327 !sdata->u.mesh.user_mpm) 328 init_timer(&sta->mesh->plink_timer); 329 sta->mesh->nonpeer_pm = NL80211_MESH_POWER_ACTIVE; 330 } 331 #endif 332 333 memcpy(sta->addr, addr, ETH_ALEN); 334 memcpy(sta->sta.addr, addr, ETH_ALEN); 335 sta->local = local; 336 sta->sdata = sdata; 337 sta->rx_stats.last_rx = jiffies; 338 339 sta->sta_state = IEEE80211_STA_NONE; 340 341 /* Mark TID as unreserved */ 342 sta->reserved_tid = IEEE80211_TID_UNRESERVED; 343 344 sta->last_connected = ktime_get_seconds(); 345 ewma_signal_init(&sta->rx_stats.avg_signal); 346 for (i = 0; i < ARRAY_SIZE(sta->rx_stats.chain_signal_avg); i++) 347 ewma_signal_init(&sta->rx_stats.chain_signal_avg[i]); 348 349 if (local->ops->wake_tx_queue) { 350 void *txq_data; 351 int size = sizeof(struct txq_info) + 352 ALIGN(hw->txq_data_size, sizeof(void *)); 353 354 txq_data = kcalloc(ARRAY_SIZE(sta->sta.txq), size, gfp); 355 if (!txq_data) 356 goto free; 357 358 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) { 359 struct txq_info *txq = txq_data + i * size; 360 361 ieee80211_init_tx_queue(sdata, sta, txq, i); 362 } 363 } 364 365 if (sta_prepare_rate_control(local, sta, gfp)) 366 goto free_txq; 367 368 for (i = 0; i < IEEE80211_NUM_TIDS; i++) { 369 /* 370 * timer_to_tid must be initialized with identity mapping 371 * to enable session_timer's data differentiation. See 372 * sta_rx_agg_session_timer_expired for usage. 373 */ 374 sta->timer_to_tid[i] = i; 375 } 376 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 377 skb_queue_head_init(&sta->ps_tx_buf[i]); 378 skb_queue_head_init(&sta->tx_filtered[i]); 379 } 380 381 for (i = 0; i < IEEE80211_NUM_TIDS; i++) 382 sta->last_seq_ctrl[i] = cpu_to_le16(USHRT_MAX); 383 384 sta->sta.smps_mode = IEEE80211_SMPS_OFF; 385 if (sdata->vif.type == NL80211_IFTYPE_AP || 386 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 387 struct ieee80211_supported_band *sband = 388 hw->wiphy->bands[ieee80211_get_sdata_band(sdata)]; 389 u8 smps = (sband->ht_cap.cap & IEEE80211_HT_CAP_SM_PS) >> 390 IEEE80211_HT_CAP_SM_PS_SHIFT; 391 /* 392 * Assume that hostapd advertises our caps in the beacon and 393 * this is the known_smps_mode for a station that just assciated 394 */ 395 switch (smps) { 396 case WLAN_HT_SMPS_CONTROL_DISABLED: 397 sta->known_smps_mode = IEEE80211_SMPS_OFF; 398 break; 399 case WLAN_HT_SMPS_CONTROL_STATIC: 400 sta->known_smps_mode = IEEE80211_SMPS_STATIC; 401 break; 402 case WLAN_HT_SMPS_CONTROL_DYNAMIC: 403 sta->known_smps_mode = IEEE80211_SMPS_DYNAMIC; 404 break; 405 default: 406 WARN_ON(1); 407 } 408 } 409 410 sta_dbg(sdata, "Allocated STA %pM\n", sta->sta.addr); 411 412 return sta; 413 414 free_txq: 415 if (sta->sta.txq[0]) 416 kfree(to_txq_info(sta->sta.txq[0])); 417 free: 418 #ifdef CONFIG_MAC80211_MESH 419 kfree(sta->mesh); 420 #endif 421 kfree(sta); 422 return NULL; 423 } 424 425 static int sta_info_insert_check(struct sta_info *sta) 426 { 427 struct ieee80211_sub_if_data *sdata = sta->sdata; 428 429 /* 430 * Can't be a WARN_ON because it can be triggered through a race: 431 * something inserts a STA (on one CPU) without holding the RTNL 432 * and another CPU turns off the net device. 433 */ 434 if (unlikely(!ieee80211_sdata_running(sdata))) 435 return -ENETDOWN; 436 437 if (WARN_ON(ether_addr_equal(sta->sta.addr, sdata->vif.addr) || 438 is_multicast_ether_addr(sta->sta.addr))) 439 return -EINVAL; 440 441 /* Strictly speaking this isn't necessary as we hold the mutex, but 442 * the rhashtable code can't really deal with that distinction. We 443 * do require the mutex for correctness though. 444 */ 445 rcu_read_lock(); 446 lockdep_assert_held(&sdata->local->sta_mtx); 447 if (ieee80211_hw_check(&sdata->local->hw, NEEDS_UNIQUE_STA_ADDR) && 448 ieee80211_find_sta_by_ifaddr(&sdata->local->hw, sta->addr, NULL)) { 449 rcu_read_unlock(); 450 return -ENOTUNIQ; 451 } 452 rcu_read_unlock(); 453 454 return 0; 455 } 456 457 static int sta_info_insert_drv_state(struct ieee80211_local *local, 458 struct ieee80211_sub_if_data *sdata, 459 struct sta_info *sta) 460 { 461 enum ieee80211_sta_state state; 462 int err = 0; 463 464 for (state = IEEE80211_STA_NOTEXIST; state < sta->sta_state; state++) { 465 err = drv_sta_state(local, sdata, sta, state, state + 1); 466 if (err) 467 break; 468 } 469 470 if (!err) { 471 /* 472 * Drivers using legacy sta_add/sta_remove callbacks only 473 * get uploaded set to true after sta_add is called. 474 */ 475 if (!local->ops->sta_add) 476 sta->uploaded = true; 477 return 0; 478 } 479 480 if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { 481 sdata_info(sdata, 482 "failed to move IBSS STA %pM to state %d (%d) - keeping it anyway\n", 483 sta->sta.addr, state + 1, err); 484 err = 0; 485 } 486 487 /* unwind on error */ 488 for (; state > IEEE80211_STA_NOTEXIST; state--) 489 WARN_ON(drv_sta_state(local, sdata, sta, state, state - 1)); 490 491 return err; 492 } 493 494 /* 495 * should be called with sta_mtx locked 496 * this function replaces the mutex lock 497 * with a RCU lock 498 */ 499 static int sta_info_insert_finish(struct sta_info *sta) __acquires(RCU) 500 { 501 struct ieee80211_local *local = sta->local; 502 struct ieee80211_sub_if_data *sdata = sta->sdata; 503 struct station_info *sinfo; 504 int err = 0; 505 506 lockdep_assert_held(&local->sta_mtx); 507 508 sinfo = kzalloc(sizeof(struct station_info), GFP_KERNEL); 509 if (!sinfo) { 510 err = -ENOMEM; 511 goto out_err; 512 } 513 514 /* check if STA exists already */ 515 if (sta_info_get_bss(sdata, sta->sta.addr)) { 516 err = -EEXIST; 517 goto out_err; 518 } 519 520 local->num_sta++; 521 local->sta_generation++; 522 smp_mb(); 523 524 /* simplify things and don't accept BA sessions yet */ 525 set_sta_flag(sta, WLAN_STA_BLOCK_BA); 526 527 /* make the station visible */ 528 err = sta_info_hash_add(local, sta); 529 if (err) 530 goto out_drop_sta; 531 532 list_add_tail_rcu(&sta->list, &local->sta_list); 533 534 /* notify driver */ 535 err = sta_info_insert_drv_state(local, sdata, sta); 536 if (err) 537 goto out_remove; 538 539 set_sta_flag(sta, WLAN_STA_INSERTED); 540 /* accept BA sessions now */ 541 clear_sta_flag(sta, WLAN_STA_BLOCK_BA); 542 543 ieee80211_sta_debugfs_add(sta); 544 rate_control_add_sta_debugfs(sta); 545 546 sinfo->generation = local->sta_generation; 547 cfg80211_new_sta(sdata->dev, sta->sta.addr, sinfo, GFP_KERNEL); 548 kfree(sinfo); 549 550 sta_dbg(sdata, "Inserted STA %pM\n", sta->sta.addr); 551 552 /* move reference to rcu-protected */ 553 rcu_read_lock(); 554 mutex_unlock(&local->sta_mtx); 555 556 if (ieee80211_vif_is_mesh(&sdata->vif)) 557 mesh_accept_plinks_update(sdata); 558 559 return 0; 560 out_remove: 561 sta_info_hash_del(local, sta); 562 list_del_rcu(&sta->list); 563 out_drop_sta: 564 local->num_sta--; 565 synchronize_net(); 566 __cleanup_single_sta(sta); 567 out_err: 568 mutex_unlock(&local->sta_mtx); 569 kfree(sinfo); 570 rcu_read_lock(); 571 return err; 572 } 573 574 int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU) 575 { 576 struct ieee80211_local *local = sta->local; 577 int err; 578 579 might_sleep(); 580 581 mutex_lock(&local->sta_mtx); 582 583 err = sta_info_insert_check(sta); 584 if (err) { 585 mutex_unlock(&local->sta_mtx); 586 rcu_read_lock(); 587 goto out_free; 588 } 589 590 err = sta_info_insert_finish(sta); 591 if (err) 592 goto out_free; 593 594 return 0; 595 out_free: 596 sta_info_free(local, sta); 597 return err; 598 } 599 600 int sta_info_insert(struct sta_info *sta) 601 { 602 int err = sta_info_insert_rcu(sta); 603 604 rcu_read_unlock(); 605 606 return err; 607 } 608 609 static inline void __bss_tim_set(u8 *tim, u16 id) 610 { 611 /* 612 * This format has been mandated by the IEEE specifications, 613 * so this line may not be changed to use the __set_bit() format. 614 */ 615 tim[id / 8] |= (1 << (id % 8)); 616 } 617 618 static inline void __bss_tim_clear(u8 *tim, u16 id) 619 { 620 /* 621 * This format has been mandated by the IEEE specifications, 622 * so this line may not be changed to use the __clear_bit() format. 623 */ 624 tim[id / 8] &= ~(1 << (id % 8)); 625 } 626 627 static inline bool __bss_tim_get(u8 *tim, u16 id) 628 { 629 /* 630 * This format has been mandated by the IEEE specifications, 631 * so this line may not be changed to use the test_bit() format. 632 */ 633 return tim[id / 8] & (1 << (id % 8)); 634 } 635 636 static unsigned long ieee80211_tids_for_ac(int ac) 637 { 638 /* If we ever support TIDs > 7, this obviously needs to be adjusted */ 639 switch (ac) { 640 case IEEE80211_AC_VO: 641 return BIT(6) | BIT(7); 642 case IEEE80211_AC_VI: 643 return BIT(4) | BIT(5); 644 case IEEE80211_AC_BE: 645 return BIT(0) | BIT(3); 646 case IEEE80211_AC_BK: 647 return BIT(1) | BIT(2); 648 default: 649 WARN_ON(1); 650 return 0; 651 } 652 } 653 654 static void __sta_info_recalc_tim(struct sta_info *sta, bool ignore_pending) 655 { 656 struct ieee80211_local *local = sta->local; 657 struct ps_data *ps; 658 bool indicate_tim = false; 659 u8 ignore_for_tim = sta->sta.uapsd_queues; 660 int ac; 661 u16 id = sta->sta.aid; 662 663 if (sta->sdata->vif.type == NL80211_IFTYPE_AP || 664 sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 665 if (WARN_ON_ONCE(!sta->sdata->bss)) 666 return; 667 668 ps = &sta->sdata->bss->ps; 669 #ifdef CONFIG_MAC80211_MESH 670 } else if (ieee80211_vif_is_mesh(&sta->sdata->vif)) { 671 ps = &sta->sdata->u.mesh.ps; 672 #endif 673 } else { 674 return; 675 } 676 677 /* No need to do anything if the driver does all */ 678 if (ieee80211_hw_check(&local->hw, AP_LINK_PS)) 679 return; 680 681 if (sta->dead) 682 goto done; 683 684 /* 685 * If all ACs are delivery-enabled then we should build 686 * the TIM bit for all ACs anyway; if only some are then 687 * we ignore those and build the TIM bit using only the 688 * non-enabled ones. 689 */ 690 if (ignore_for_tim == BIT(IEEE80211_NUM_ACS) - 1) 691 ignore_for_tim = 0; 692 693 if (ignore_pending) 694 ignore_for_tim = BIT(IEEE80211_NUM_ACS) - 1; 695 696 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 697 unsigned long tids; 698 699 if (ignore_for_tim & BIT(ac)) 700 continue; 701 702 indicate_tim |= !skb_queue_empty(&sta->tx_filtered[ac]) || 703 !skb_queue_empty(&sta->ps_tx_buf[ac]); 704 if (indicate_tim) 705 break; 706 707 tids = ieee80211_tids_for_ac(ac); 708 709 indicate_tim |= 710 sta->driver_buffered_tids & tids; 711 indicate_tim |= 712 sta->txq_buffered_tids & tids; 713 } 714 715 done: 716 spin_lock_bh(&local->tim_lock); 717 718 if (indicate_tim == __bss_tim_get(ps->tim, id)) 719 goto out_unlock; 720 721 if (indicate_tim) 722 __bss_tim_set(ps->tim, id); 723 else 724 __bss_tim_clear(ps->tim, id); 725 726 if (local->ops->set_tim && !WARN_ON(sta->dead)) { 727 local->tim_in_locked_section = true; 728 drv_set_tim(local, &sta->sta, indicate_tim); 729 local->tim_in_locked_section = false; 730 } 731 732 out_unlock: 733 spin_unlock_bh(&local->tim_lock); 734 } 735 736 void sta_info_recalc_tim(struct sta_info *sta) 737 { 738 __sta_info_recalc_tim(sta, false); 739 } 740 741 static bool sta_info_buffer_expired(struct sta_info *sta, struct sk_buff *skb) 742 { 743 struct ieee80211_tx_info *info; 744 int timeout; 745 746 if (!skb) 747 return false; 748 749 info = IEEE80211_SKB_CB(skb); 750 751 /* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */ 752 timeout = (sta->listen_interval * 753 sta->sdata->vif.bss_conf.beacon_int * 754 32 / 15625) * HZ; 755 if (timeout < STA_TX_BUFFER_EXPIRE) 756 timeout = STA_TX_BUFFER_EXPIRE; 757 return time_after(jiffies, info->control.jiffies + timeout); 758 } 759 760 761 static bool sta_info_cleanup_expire_buffered_ac(struct ieee80211_local *local, 762 struct sta_info *sta, int ac) 763 { 764 unsigned long flags; 765 struct sk_buff *skb; 766 767 /* 768 * First check for frames that should expire on the filtered 769 * queue. Frames here were rejected by the driver and are on 770 * a separate queue to avoid reordering with normal PS-buffered 771 * frames. They also aren't accounted for right now in the 772 * total_ps_buffered counter. 773 */ 774 for (;;) { 775 spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags); 776 skb = skb_peek(&sta->tx_filtered[ac]); 777 if (sta_info_buffer_expired(sta, skb)) 778 skb = __skb_dequeue(&sta->tx_filtered[ac]); 779 else 780 skb = NULL; 781 spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags); 782 783 /* 784 * Frames are queued in order, so if this one 785 * hasn't expired yet we can stop testing. If 786 * we actually reached the end of the queue we 787 * also need to stop, of course. 788 */ 789 if (!skb) 790 break; 791 ieee80211_free_txskb(&local->hw, skb); 792 } 793 794 /* 795 * Now also check the normal PS-buffered queue, this will 796 * only find something if the filtered queue was emptied 797 * since the filtered frames are all before the normal PS 798 * buffered frames. 799 */ 800 for (;;) { 801 spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags); 802 skb = skb_peek(&sta->ps_tx_buf[ac]); 803 if (sta_info_buffer_expired(sta, skb)) 804 skb = __skb_dequeue(&sta->ps_tx_buf[ac]); 805 else 806 skb = NULL; 807 spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags); 808 809 /* 810 * frames are queued in order, so if this one 811 * hasn't expired yet (or we reached the end of 812 * the queue) we can stop testing 813 */ 814 if (!skb) 815 break; 816 817 local->total_ps_buffered--; 818 ps_dbg(sta->sdata, "Buffered frame expired (STA %pM)\n", 819 sta->sta.addr); 820 ieee80211_free_txskb(&local->hw, skb); 821 } 822 823 /* 824 * Finally, recalculate the TIM bit for this station -- it might 825 * now be clear because the station was too slow to retrieve its 826 * frames. 827 */ 828 sta_info_recalc_tim(sta); 829 830 /* 831 * Return whether there are any frames still buffered, this is 832 * used to check whether the cleanup timer still needs to run, 833 * if there are no frames we don't need to rearm the timer. 834 */ 835 return !(skb_queue_empty(&sta->ps_tx_buf[ac]) && 836 skb_queue_empty(&sta->tx_filtered[ac])); 837 } 838 839 static bool sta_info_cleanup_expire_buffered(struct ieee80211_local *local, 840 struct sta_info *sta) 841 { 842 bool have_buffered = false; 843 int ac; 844 845 /* This is only necessary for stations on BSS/MBSS interfaces */ 846 if (!sta->sdata->bss && 847 !ieee80211_vif_is_mesh(&sta->sdata->vif)) 848 return false; 849 850 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 851 have_buffered |= 852 sta_info_cleanup_expire_buffered_ac(local, sta, ac); 853 854 return have_buffered; 855 } 856 857 static int __must_check __sta_info_destroy_part1(struct sta_info *sta) 858 { 859 struct ieee80211_local *local; 860 struct ieee80211_sub_if_data *sdata; 861 int ret; 862 863 might_sleep(); 864 865 if (!sta) 866 return -ENOENT; 867 868 local = sta->local; 869 sdata = sta->sdata; 870 871 lockdep_assert_held(&local->sta_mtx); 872 873 /* 874 * Before removing the station from the driver and 875 * rate control, it might still start new aggregation 876 * sessions -- block that to make sure the tear-down 877 * will be sufficient. 878 */ 879 set_sta_flag(sta, WLAN_STA_BLOCK_BA); 880 ieee80211_sta_tear_down_BA_sessions(sta, AGG_STOP_DESTROY_STA); 881 882 ret = sta_info_hash_del(local, sta); 883 if (WARN_ON(ret)) 884 return ret; 885 886 /* 887 * for TDLS peers, make sure to return to the base channel before 888 * removal. 889 */ 890 if (test_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL)) { 891 drv_tdls_cancel_channel_switch(local, sdata, &sta->sta); 892 clear_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL); 893 } 894 895 list_del_rcu(&sta->list); 896 sta->removed = true; 897 898 drv_sta_pre_rcu_remove(local, sta->sdata, sta); 899 900 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN && 901 rcu_access_pointer(sdata->u.vlan.sta) == sta) 902 RCU_INIT_POINTER(sdata->u.vlan.sta, NULL); 903 904 return 0; 905 } 906 907 static void __sta_info_destroy_part2(struct sta_info *sta) 908 { 909 struct ieee80211_local *local = sta->local; 910 struct ieee80211_sub_if_data *sdata = sta->sdata; 911 struct station_info *sinfo; 912 int ret; 913 914 /* 915 * NOTE: This assumes at least synchronize_net() was done 916 * after _part1 and before _part2! 917 */ 918 919 might_sleep(); 920 lockdep_assert_held(&local->sta_mtx); 921 922 /* now keys can no longer be reached */ 923 ieee80211_free_sta_keys(local, sta); 924 925 /* disable TIM bit - last chance to tell driver */ 926 __sta_info_recalc_tim(sta, true); 927 928 sta->dead = true; 929 930 local->num_sta--; 931 local->sta_generation++; 932 933 while (sta->sta_state > IEEE80211_STA_NONE) { 934 ret = sta_info_move_state(sta, sta->sta_state - 1); 935 if (ret) { 936 WARN_ON_ONCE(1); 937 break; 938 } 939 } 940 941 if (sta->uploaded) { 942 ret = drv_sta_state(local, sdata, sta, IEEE80211_STA_NONE, 943 IEEE80211_STA_NOTEXIST); 944 WARN_ON_ONCE(ret != 0); 945 } 946 947 sta_dbg(sdata, "Removed STA %pM\n", sta->sta.addr); 948 949 sinfo = kzalloc(sizeof(*sinfo), GFP_KERNEL); 950 if (sinfo) 951 sta_set_sinfo(sta, sinfo); 952 cfg80211_del_sta_sinfo(sdata->dev, sta->sta.addr, sinfo, GFP_KERNEL); 953 kfree(sinfo); 954 955 rate_control_remove_sta_debugfs(sta); 956 ieee80211_sta_debugfs_remove(sta); 957 958 cleanup_single_sta(sta); 959 } 960 961 int __must_check __sta_info_destroy(struct sta_info *sta) 962 { 963 int err = __sta_info_destroy_part1(sta); 964 965 if (err) 966 return err; 967 968 synchronize_net(); 969 970 __sta_info_destroy_part2(sta); 971 972 return 0; 973 } 974 975 int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, const u8 *addr) 976 { 977 struct sta_info *sta; 978 int ret; 979 980 mutex_lock(&sdata->local->sta_mtx); 981 sta = sta_info_get(sdata, addr); 982 ret = __sta_info_destroy(sta); 983 mutex_unlock(&sdata->local->sta_mtx); 984 985 return ret; 986 } 987 988 int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata, 989 const u8 *addr) 990 { 991 struct sta_info *sta; 992 int ret; 993 994 mutex_lock(&sdata->local->sta_mtx); 995 sta = sta_info_get_bss(sdata, addr); 996 ret = __sta_info_destroy(sta); 997 mutex_unlock(&sdata->local->sta_mtx); 998 999 return ret; 1000 } 1001 1002 static void sta_info_cleanup(unsigned long data) 1003 { 1004 struct ieee80211_local *local = (struct ieee80211_local *) data; 1005 struct sta_info *sta; 1006 bool timer_needed = false; 1007 1008 rcu_read_lock(); 1009 list_for_each_entry_rcu(sta, &local->sta_list, list) 1010 if (sta_info_cleanup_expire_buffered(local, sta)) 1011 timer_needed = true; 1012 rcu_read_unlock(); 1013 1014 if (local->quiescing) 1015 return; 1016 1017 if (!timer_needed) 1018 return; 1019 1020 mod_timer(&local->sta_cleanup, 1021 round_jiffies(jiffies + STA_INFO_CLEANUP_INTERVAL)); 1022 } 1023 1024 u32 sta_addr_hash(const void *key, u32 length, u32 seed) 1025 { 1026 return jhash(key, ETH_ALEN, seed); 1027 } 1028 1029 int sta_info_init(struct ieee80211_local *local) 1030 { 1031 int err; 1032 1033 err = rhashtable_init(&local->sta_hash, &sta_rht_params); 1034 if (err) 1035 return err; 1036 1037 spin_lock_init(&local->tim_lock); 1038 mutex_init(&local->sta_mtx); 1039 INIT_LIST_HEAD(&local->sta_list); 1040 1041 setup_timer(&local->sta_cleanup, sta_info_cleanup, 1042 (unsigned long)local); 1043 return 0; 1044 } 1045 1046 void sta_info_stop(struct ieee80211_local *local) 1047 { 1048 del_timer_sync(&local->sta_cleanup); 1049 rhashtable_destroy(&local->sta_hash); 1050 } 1051 1052 1053 int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans) 1054 { 1055 struct ieee80211_local *local = sdata->local; 1056 struct sta_info *sta, *tmp; 1057 LIST_HEAD(free_list); 1058 int ret = 0; 1059 1060 might_sleep(); 1061 1062 WARN_ON(vlans && sdata->vif.type != NL80211_IFTYPE_AP); 1063 WARN_ON(vlans && !sdata->bss); 1064 1065 mutex_lock(&local->sta_mtx); 1066 list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { 1067 if (sdata == sta->sdata || 1068 (vlans && sdata->bss == sta->sdata->bss)) { 1069 if (!WARN_ON(__sta_info_destroy_part1(sta))) 1070 list_add(&sta->free_list, &free_list); 1071 ret++; 1072 } 1073 } 1074 1075 if (!list_empty(&free_list)) { 1076 synchronize_net(); 1077 list_for_each_entry_safe(sta, tmp, &free_list, free_list) 1078 __sta_info_destroy_part2(sta); 1079 } 1080 mutex_unlock(&local->sta_mtx); 1081 1082 return ret; 1083 } 1084 1085 void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, 1086 unsigned long exp_time) 1087 { 1088 struct ieee80211_local *local = sdata->local; 1089 struct sta_info *sta, *tmp; 1090 1091 mutex_lock(&local->sta_mtx); 1092 1093 list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { 1094 if (sdata != sta->sdata) 1095 continue; 1096 1097 if (time_after(jiffies, sta->rx_stats.last_rx + exp_time)) { 1098 sta_dbg(sta->sdata, "expiring inactive STA %pM\n", 1099 sta->sta.addr); 1100 1101 if (ieee80211_vif_is_mesh(&sdata->vif) && 1102 test_sta_flag(sta, WLAN_STA_PS_STA)) 1103 atomic_dec(&sdata->u.mesh.ps.num_sta_ps); 1104 1105 WARN_ON(__sta_info_destroy(sta)); 1106 } 1107 } 1108 1109 mutex_unlock(&local->sta_mtx); 1110 } 1111 1112 struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw, 1113 const u8 *addr, 1114 const u8 *localaddr) 1115 { 1116 struct ieee80211_local *local = hw_to_local(hw); 1117 struct sta_info *sta; 1118 struct rhash_head *tmp; 1119 const struct bucket_table *tbl; 1120 1121 tbl = rht_dereference_rcu(local->sta_hash.tbl, &local->sta_hash); 1122 1123 /* 1124 * Just return a random station if localaddr is NULL 1125 * ... first in list. 1126 */ 1127 for_each_sta_info(local, tbl, addr, sta, tmp) { 1128 if (localaddr && 1129 !ether_addr_equal(sta->sdata->vif.addr, localaddr)) 1130 continue; 1131 if (!sta->uploaded) 1132 return NULL; 1133 return &sta->sta; 1134 } 1135 1136 return NULL; 1137 } 1138 EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_ifaddr); 1139 1140 struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif, 1141 const u8 *addr) 1142 { 1143 struct sta_info *sta; 1144 1145 if (!vif) 1146 return NULL; 1147 1148 sta = sta_info_get_bss(vif_to_sdata(vif), addr); 1149 if (!sta) 1150 return NULL; 1151 1152 if (!sta->uploaded) 1153 return NULL; 1154 1155 return &sta->sta; 1156 } 1157 EXPORT_SYMBOL(ieee80211_find_sta); 1158 1159 /* powersave support code */ 1160 void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta) 1161 { 1162 struct ieee80211_sub_if_data *sdata = sta->sdata; 1163 struct ieee80211_local *local = sdata->local; 1164 struct sk_buff_head pending; 1165 int filtered = 0, buffered = 0, ac, i; 1166 unsigned long flags; 1167 struct ps_data *ps; 1168 1169 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 1170 sdata = container_of(sdata->bss, struct ieee80211_sub_if_data, 1171 u.ap); 1172 1173 if (sdata->vif.type == NL80211_IFTYPE_AP) 1174 ps = &sdata->bss->ps; 1175 else if (ieee80211_vif_is_mesh(&sdata->vif)) 1176 ps = &sdata->u.mesh.ps; 1177 else 1178 return; 1179 1180 clear_sta_flag(sta, WLAN_STA_SP); 1181 1182 BUILD_BUG_ON(BITS_TO_LONGS(IEEE80211_NUM_TIDS) > 1); 1183 sta->driver_buffered_tids = 0; 1184 sta->txq_buffered_tids = 0; 1185 1186 if (!ieee80211_hw_check(&local->hw, AP_LINK_PS)) 1187 drv_sta_notify(local, sdata, STA_NOTIFY_AWAKE, &sta->sta); 1188 1189 if (sta->sta.txq[0]) { 1190 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) { 1191 struct txq_info *txqi = to_txq_info(sta->sta.txq[i]); 1192 1193 if (!skb_queue_len(&txqi->queue)) 1194 continue; 1195 1196 drv_wake_tx_queue(local, txqi); 1197 } 1198 } 1199 1200 skb_queue_head_init(&pending); 1201 1202 /* sync with ieee80211_tx_h_unicast_ps_buf */ 1203 spin_lock(&sta->ps_lock); 1204 /* Send all buffered frames to the station */ 1205 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1206 int count = skb_queue_len(&pending), tmp; 1207 1208 spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags); 1209 skb_queue_splice_tail_init(&sta->tx_filtered[ac], &pending); 1210 spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags); 1211 tmp = skb_queue_len(&pending); 1212 filtered += tmp - count; 1213 count = tmp; 1214 1215 spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags); 1216 skb_queue_splice_tail_init(&sta->ps_tx_buf[ac], &pending); 1217 spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags); 1218 tmp = skb_queue_len(&pending); 1219 buffered += tmp - count; 1220 } 1221 1222 ieee80211_add_pending_skbs(local, &pending); 1223 1224 /* now we're no longer in the deliver code */ 1225 clear_sta_flag(sta, WLAN_STA_PS_DELIVER); 1226 1227 /* The station might have polled and then woken up before we responded, 1228 * so clear these flags now to avoid them sticking around. 1229 */ 1230 clear_sta_flag(sta, WLAN_STA_PSPOLL); 1231 clear_sta_flag(sta, WLAN_STA_UAPSD); 1232 spin_unlock(&sta->ps_lock); 1233 1234 atomic_dec(&ps->num_sta_ps); 1235 1236 /* This station just woke up and isn't aware of our SMPS state */ 1237 if (!ieee80211_vif_is_mesh(&sdata->vif) && 1238 !ieee80211_smps_is_restrictive(sta->known_smps_mode, 1239 sdata->smps_mode) && 1240 sta->known_smps_mode != sdata->bss->req_smps && 1241 sta_info_tx_streams(sta) != 1) { 1242 ht_dbg(sdata, 1243 "%pM just woke up and MIMO capable - update SMPS\n", 1244 sta->sta.addr); 1245 ieee80211_send_smps_action(sdata, sdata->bss->req_smps, 1246 sta->sta.addr, 1247 sdata->vif.bss_conf.bssid); 1248 } 1249 1250 local->total_ps_buffered -= buffered; 1251 1252 sta_info_recalc_tim(sta); 1253 1254 ps_dbg(sdata, 1255 "STA %pM aid %d sending %d filtered/%d PS frames since STA not sleeping anymore\n", 1256 sta->sta.addr, sta->sta.aid, filtered, buffered); 1257 1258 ieee80211_check_fast_xmit(sta); 1259 } 1260 1261 static void ieee80211_send_null_response(struct sta_info *sta, int tid, 1262 enum ieee80211_frame_release_type reason, 1263 bool call_driver, bool more_data) 1264 { 1265 struct ieee80211_sub_if_data *sdata = sta->sdata; 1266 struct ieee80211_local *local = sdata->local; 1267 struct ieee80211_qos_hdr *nullfunc; 1268 struct sk_buff *skb; 1269 int size = sizeof(*nullfunc); 1270 __le16 fc; 1271 bool qos = sta->sta.wme; 1272 struct ieee80211_tx_info *info; 1273 struct ieee80211_chanctx_conf *chanctx_conf; 1274 1275 if (qos) { 1276 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | 1277 IEEE80211_STYPE_QOS_NULLFUNC | 1278 IEEE80211_FCTL_FROMDS); 1279 } else { 1280 size -= 2; 1281 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | 1282 IEEE80211_STYPE_NULLFUNC | 1283 IEEE80211_FCTL_FROMDS); 1284 } 1285 1286 skb = dev_alloc_skb(local->hw.extra_tx_headroom + size); 1287 if (!skb) 1288 return; 1289 1290 skb_reserve(skb, local->hw.extra_tx_headroom); 1291 1292 nullfunc = (void *) skb_put(skb, size); 1293 nullfunc->frame_control = fc; 1294 nullfunc->duration_id = 0; 1295 memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN); 1296 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 1297 memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN); 1298 nullfunc->seq_ctrl = 0; 1299 1300 skb->priority = tid; 1301 skb_set_queue_mapping(skb, ieee802_1d_to_ac[tid]); 1302 if (qos) { 1303 nullfunc->qos_ctrl = cpu_to_le16(tid); 1304 1305 if (reason == IEEE80211_FRAME_RELEASE_UAPSD) { 1306 nullfunc->qos_ctrl |= 1307 cpu_to_le16(IEEE80211_QOS_CTL_EOSP); 1308 if (more_data) 1309 nullfunc->frame_control |= 1310 cpu_to_le16(IEEE80211_FCTL_MOREDATA); 1311 } 1312 } 1313 1314 info = IEEE80211_SKB_CB(skb); 1315 1316 /* 1317 * Tell TX path to send this frame even though the 1318 * STA may still remain is PS mode after this frame 1319 * exchange. Also set EOSP to indicate this packet 1320 * ends the poll/service period. 1321 */ 1322 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER | 1323 IEEE80211_TX_STATUS_EOSP | 1324 IEEE80211_TX_CTL_REQ_TX_STATUS; 1325 1326 info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE; 1327 1328 if (call_driver) 1329 drv_allow_buffered_frames(local, sta, BIT(tid), 1, 1330 reason, false); 1331 1332 skb->dev = sdata->dev; 1333 1334 rcu_read_lock(); 1335 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 1336 if (WARN_ON(!chanctx_conf)) { 1337 rcu_read_unlock(); 1338 kfree_skb(skb); 1339 return; 1340 } 1341 1342 info->band = chanctx_conf->def.chan->band; 1343 ieee80211_xmit(sdata, sta, skb); 1344 rcu_read_unlock(); 1345 } 1346 1347 static int find_highest_prio_tid(unsigned long tids) 1348 { 1349 /* lower 3 TIDs aren't ordered perfectly */ 1350 if (tids & 0xF8) 1351 return fls(tids) - 1; 1352 /* TID 0 is BE just like TID 3 */ 1353 if (tids & BIT(0)) 1354 return 0; 1355 return fls(tids) - 1; 1356 } 1357 1358 /* Indicates if the MORE_DATA bit should be set in the last 1359 * frame obtained by ieee80211_sta_ps_get_frames. 1360 * Note that driver_release_tids is relevant only if 1361 * reason = IEEE80211_FRAME_RELEASE_PSPOLL 1362 */ 1363 static bool 1364 ieee80211_sta_ps_more_data(struct sta_info *sta, u8 ignored_acs, 1365 enum ieee80211_frame_release_type reason, 1366 unsigned long driver_release_tids) 1367 { 1368 int ac; 1369 1370 /* If the driver has data on more than one TID then 1371 * certainly there's more data if we release just a 1372 * single frame now (from a single TID). This will 1373 * only happen for PS-Poll. 1374 */ 1375 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL && 1376 hweight16(driver_release_tids) > 1) 1377 return true; 1378 1379 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1380 if (ignored_acs & BIT(ac)) 1381 continue; 1382 1383 if (!skb_queue_empty(&sta->tx_filtered[ac]) || 1384 !skb_queue_empty(&sta->ps_tx_buf[ac])) 1385 return true; 1386 } 1387 1388 return false; 1389 } 1390 1391 static void 1392 ieee80211_sta_ps_get_frames(struct sta_info *sta, int n_frames, u8 ignored_acs, 1393 enum ieee80211_frame_release_type reason, 1394 struct sk_buff_head *frames, 1395 unsigned long *driver_release_tids) 1396 { 1397 struct ieee80211_sub_if_data *sdata = sta->sdata; 1398 struct ieee80211_local *local = sdata->local; 1399 int ac; 1400 1401 /* Get response frame(s) and more data bit for the last one. */ 1402 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1403 unsigned long tids; 1404 1405 if (ignored_acs & BIT(ac)) 1406 continue; 1407 1408 tids = ieee80211_tids_for_ac(ac); 1409 1410 /* if we already have frames from software, then we can't also 1411 * release from hardware queues 1412 */ 1413 if (skb_queue_empty(frames)) { 1414 *driver_release_tids |= 1415 sta->driver_buffered_tids & tids; 1416 *driver_release_tids |= sta->txq_buffered_tids & tids; 1417 } 1418 1419 if (!*driver_release_tids) { 1420 struct sk_buff *skb; 1421 1422 while (n_frames > 0) { 1423 skb = skb_dequeue(&sta->tx_filtered[ac]); 1424 if (!skb) { 1425 skb = skb_dequeue( 1426 &sta->ps_tx_buf[ac]); 1427 if (skb) 1428 local->total_ps_buffered--; 1429 } 1430 if (!skb) 1431 break; 1432 n_frames--; 1433 __skb_queue_tail(frames, skb); 1434 } 1435 } 1436 1437 /* If we have more frames buffered on this AC, then abort the 1438 * loop since we can't send more data from other ACs before 1439 * the buffered frames from this. 1440 */ 1441 if (!skb_queue_empty(&sta->tx_filtered[ac]) || 1442 !skb_queue_empty(&sta->ps_tx_buf[ac])) 1443 break; 1444 } 1445 } 1446 1447 static void 1448 ieee80211_sta_ps_deliver_response(struct sta_info *sta, 1449 int n_frames, u8 ignored_acs, 1450 enum ieee80211_frame_release_type reason) 1451 { 1452 struct ieee80211_sub_if_data *sdata = sta->sdata; 1453 struct ieee80211_local *local = sdata->local; 1454 unsigned long driver_release_tids = 0; 1455 struct sk_buff_head frames; 1456 bool more_data; 1457 1458 /* Service or PS-Poll period starts */ 1459 set_sta_flag(sta, WLAN_STA_SP); 1460 1461 __skb_queue_head_init(&frames); 1462 1463 ieee80211_sta_ps_get_frames(sta, n_frames, ignored_acs, reason, 1464 &frames, &driver_release_tids); 1465 1466 more_data = ieee80211_sta_ps_more_data(sta, ignored_acs, reason, driver_release_tids); 1467 1468 if (driver_release_tids && reason == IEEE80211_FRAME_RELEASE_PSPOLL) 1469 driver_release_tids = 1470 BIT(find_highest_prio_tid(driver_release_tids)); 1471 1472 if (skb_queue_empty(&frames) && !driver_release_tids) { 1473 int tid; 1474 1475 /* 1476 * For PS-Poll, this can only happen due to a race condition 1477 * when we set the TIM bit and the station notices it, but 1478 * before it can poll for the frame we expire it. 1479 * 1480 * For uAPSD, this is said in the standard (11.2.1.5 h): 1481 * At each unscheduled SP for a non-AP STA, the AP shall 1482 * attempt to transmit at least one MSDU or MMPDU, but no 1483 * more than the value specified in the Max SP Length field 1484 * in the QoS Capability element from delivery-enabled ACs, 1485 * that are destined for the non-AP STA. 1486 * 1487 * Since we have no other MSDU/MMPDU, transmit a QoS null frame. 1488 */ 1489 1490 /* This will evaluate to 1, 3, 5 or 7. */ 1491 tid = 7 - ((ffs(~ignored_acs) - 1) << 1); 1492 1493 ieee80211_send_null_response(sta, tid, reason, true, false); 1494 } else if (!driver_release_tids) { 1495 struct sk_buff_head pending; 1496 struct sk_buff *skb; 1497 int num = 0; 1498 u16 tids = 0; 1499 bool need_null = false; 1500 1501 skb_queue_head_init(&pending); 1502 1503 while ((skb = __skb_dequeue(&frames))) { 1504 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 1505 struct ieee80211_hdr *hdr = (void *) skb->data; 1506 u8 *qoshdr = NULL; 1507 1508 num++; 1509 1510 /* 1511 * Tell TX path to send this frame even though the 1512 * STA may still remain is PS mode after this frame 1513 * exchange. 1514 */ 1515 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER; 1516 info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE; 1517 1518 /* 1519 * Use MoreData flag to indicate whether there are 1520 * more buffered frames for this STA 1521 */ 1522 if (more_data || !skb_queue_empty(&frames)) 1523 hdr->frame_control |= 1524 cpu_to_le16(IEEE80211_FCTL_MOREDATA); 1525 else 1526 hdr->frame_control &= 1527 cpu_to_le16(~IEEE80211_FCTL_MOREDATA); 1528 1529 if (ieee80211_is_data_qos(hdr->frame_control) || 1530 ieee80211_is_qos_nullfunc(hdr->frame_control)) 1531 qoshdr = ieee80211_get_qos_ctl(hdr); 1532 1533 tids |= BIT(skb->priority); 1534 1535 __skb_queue_tail(&pending, skb); 1536 1537 /* end service period after last frame or add one */ 1538 if (!skb_queue_empty(&frames)) 1539 continue; 1540 1541 if (reason != IEEE80211_FRAME_RELEASE_UAPSD) { 1542 /* for PS-Poll, there's only one frame */ 1543 info->flags |= IEEE80211_TX_STATUS_EOSP | 1544 IEEE80211_TX_CTL_REQ_TX_STATUS; 1545 break; 1546 } 1547 1548 /* For uAPSD, things are a bit more complicated. If the 1549 * last frame has a QoS header (i.e. is a QoS-data or 1550 * QoS-nulldata frame) then just set the EOSP bit there 1551 * and be done. 1552 * If the frame doesn't have a QoS header (which means 1553 * it should be a bufferable MMPDU) then we can't set 1554 * the EOSP bit in the QoS header; add a QoS-nulldata 1555 * frame to the list to send it after the MMPDU. 1556 * 1557 * Note that this code is only in the mac80211-release 1558 * code path, we assume that the driver will not buffer 1559 * anything but QoS-data frames, or if it does, will 1560 * create the QoS-nulldata frame by itself if needed. 1561 * 1562 * Cf. 802.11-2012 10.2.1.10 (c). 1563 */ 1564 if (qoshdr) { 1565 *qoshdr |= IEEE80211_QOS_CTL_EOSP; 1566 1567 info->flags |= IEEE80211_TX_STATUS_EOSP | 1568 IEEE80211_TX_CTL_REQ_TX_STATUS; 1569 } else { 1570 /* The standard isn't completely clear on this 1571 * as it says the more-data bit should be set 1572 * if there are more BUs. The QoS-Null frame 1573 * we're about to send isn't buffered yet, we 1574 * only create it below, but let's pretend it 1575 * was buffered just in case some clients only 1576 * expect more-data=0 when eosp=1. 1577 */ 1578 hdr->frame_control |= 1579 cpu_to_le16(IEEE80211_FCTL_MOREDATA); 1580 need_null = true; 1581 num++; 1582 } 1583 break; 1584 } 1585 1586 drv_allow_buffered_frames(local, sta, tids, num, 1587 reason, more_data); 1588 1589 ieee80211_add_pending_skbs(local, &pending); 1590 1591 if (need_null) 1592 ieee80211_send_null_response( 1593 sta, find_highest_prio_tid(tids), 1594 reason, false, false); 1595 1596 sta_info_recalc_tim(sta); 1597 } else { 1598 unsigned long tids = sta->txq_buffered_tids & driver_release_tids; 1599 int tid; 1600 1601 /* 1602 * We need to release a frame that is buffered somewhere in the 1603 * driver ... it'll have to handle that. 1604 * Note that the driver also has to check the number of frames 1605 * on the TIDs we're releasing from - if there are more than 1606 * n_frames it has to set the more-data bit (if we didn't ask 1607 * it to set it anyway due to other buffered frames); if there 1608 * are fewer than n_frames it has to make sure to adjust that 1609 * to allow the service period to end properly. 1610 */ 1611 drv_release_buffered_frames(local, sta, driver_release_tids, 1612 n_frames, reason, more_data); 1613 1614 /* 1615 * Note that we don't recalculate the TIM bit here as it would 1616 * most likely have no effect at all unless the driver told us 1617 * that the TID(s) became empty before returning here from the 1618 * release function. 1619 * Either way, however, when the driver tells us that the TID(s) 1620 * became empty or we find that a txq became empty, we'll do the 1621 * TIM recalculation. 1622 */ 1623 1624 if (!sta->sta.txq[0]) 1625 return; 1626 1627 for (tid = 0; tid < ARRAY_SIZE(sta->sta.txq); tid++) { 1628 struct txq_info *txqi = to_txq_info(sta->sta.txq[tid]); 1629 1630 if (!(tids & BIT(tid)) || skb_queue_len(&txqi->queue)) 1631 continue; 1632 1633 sta_info_recalc_tim(sta); 1634 break; 1635 } 1636 } 1637 } 1638 1639 void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta) 1640 { 1641 u8 ignore_for_response = sta->sta.uapsd_queues; 1642 1643 /* 1644 * If all ACs are delivery-enabled then we should reply 1645 * from any of them, if only some are enabled we reply 1646 * only from the non-enabled ones. 1647 */ 1648 if (ignore_for_response == BIT(IEEE80211_NUM_ACS) - 1) 1649 ignore_for_response = 0; 1650 1651 ieee80211_sta_ps_deliver_response(sta, 1, ignore_for_response, 1652 IEEE80211_FRAME_RELEASE_PSPOLL); 1653 } 1654 1655 void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta) 1656 { 1657 int n_frames = sta->sta.max_sp; 1658 u8 delivery_enabled = sta->sta.uapsd_queues; 1659 1660 /* 1661 * If we ever grow support for TSPEC this might happen if 1662 * the TSPEC update from hostapd comes in between a trigger 1663 * frame setting WLAN_STA_UAPSD in the RX path and this 1664 * actually getting called. 1665 */ 1666 if (!delivery_enabled) 1667 return; 1668 1669 switch (sta->sta.max_sp) { 1670 case 1: 1671 n_frames = 2; 1672 break; 1673 case 2: 1674 n_frames = 4; 1675 break; 1676 case 3: 1677 n_frames = 6; 1678 break; 1679 case 0: 1680 /* XXX: what is a good value? */ 1681 n_frames = 128; 1682 break; 1683 } 1684 1685 ieee80211_sta_ps_deliver_response(sta, n_frames, ~delivery_enabled, 1686 IEEE80211_FRAME_RELEASE_UAPSD); 1687 } 1688 1689 void ieee80211_sta_block_awake(struct ieee80211_hw *hw, 1690 struct ieee80211_sta *pubsta, bool block) 1691 { 1692 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 1693 1694 trace_api_sta_block_awake(sta->local, pubsta, block); 1695 1696 if (block) { 1697 set_sta_flag(sta, WLAN_STA_PS_DRIVER); 1698 ieee80211_clear_fast_xmit(sta); 1699 return; 1700 } 1701 1702 if (!test_sta_flag(sta, WLAN_STA_PS_DRIVER)) 1703 return; 1704 1705 if (!test_sta_flag(sta, WLAN_STA_PS_STA)) { 1706 set_sta_flag(sta, WLAN_STA_PS_DELIVER); 1707 clear_sta_flag(sta, WLAN_STA_PS_DRIVER); 1708 ieee80211_queue_work(hw, &sta->drv_deliver_wk); 1709 } else if (test_sta_flag(sta, WLAN_STA_PSPOLL) || 1710 test_sta_flag(sta, WLAN_STA_UAPSD)) { 1711 /* must be asleep in this case */ 1712 clear_sta_flag(sta, WLAN_STA_PS_DRIVER); 1713 ieee80211_queue_work(hw, &sta->drv_deliver_wk); 1714 } else { 1715 clear_sta_flag(sta, WLAN_STA_PS_DRIVER); 1716 ieee80211_check_fast_xmit(sta); 1717 } 1718 } 1719 EXPORT_SYMBOL(ieee80211_sta_block_awake); 1720 1721 void ieee80211_sta_eosp(struct ieee80211_sta *pubsta) 1722 { 1723 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 1724 struct ieee80211_local *local = sta->local; 1725 1726 trace_api_eosp(local, pubsta); 1727 1728 clear_sta_flag(sta, WLAN_STA_SP); 1729 } 1730 EXPORT_SYMBOL(ieee80211_sta_eosp); 1731 1732 void ieee80211_send_eosp_nullfunc(struct ieee80211_sta *pubsta, int tid) 1733 { 1734 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 1735 enum ieee80211_frame_release_type reason; 1736 bool more_data; 1737 1738 trace_api_send_eosp_nullfunc(sta->local, pubsta, tid); 1739 1740 reason = IEEE80211_FRAME_RELEASE_UAPSD; 1741 more_data = ieee80211_sta_ps_more_data(sta, ~sta->sta.uapsd_queues, 1742 reason, 0); 1743 1744 ieee80211_send_null_response(sta, tid, reason, false, more_data); 1745 } 1746 EXPORT_SYMBOL(ieee80211_send_eosp_nullfunc); 1747 1748 void ieee80211_sta_set_buffered(struct ieee80211_sta *pubsta, 1749 u8 tid, bool buffered) 1750 { 1751 struct sta_info *sta = container_of(pubsta, struct sta_info, sta); 1752 1753 if (WARN_ON(tid >= IEEE80211_NUM_TIDS)) 1754 return; 1755 1756 trace_api_sta_set_buffered(sta->local, pubsta, tid, buffered); 1757 1758 if (buffered) 1759 set_bit(tid, &sta->driver_buffered_tids); 1760 else 1761 clear_bit(tid, &sta->driver_buffered_tids); 1762 1763 sta_info_recalc_tim(sta); 1764 } 1765 EXPORT_SYMBOL(ieee80211_sta_set_buffered); 1766 1767 int sta_info_move_state(struct sta_info *sta, 1768 enum ieee80211_sta_state new_state) 1769 { 1770 might_sleep(); 1771 1772 if (sta->sta_state == new_state) 1773 return 0; 1774 1775 /* check allowed transitions first */ 1776 1777 switch (new_state) { 1778 case IEEE80211_STA_NONE: 1779 if (sta->sta_state != IEEE80211_STA_AUTH) 1780 return -EINVAL; 1781 break; 1782 case IEEE80211_STA_AUTH: 1783 if (sta->sta_state != IEEE80211_STA_NONE && 1784 sta->sta_state != IEEE80211_STA_ASSOC) 1785 return -EINVAL; 1786 break; 1787 case IEEE80211_STA_ASSOC: 1788 if (sta->sta_state != IEEE80211_STA_AUTH && 1789 sta->sta_state != IEEE80211_STA_AUTHORIZED) 1790 return -EINVAL; 1791 break; 1792 case IEEE80211_STA_AUTHORIZED: 1793 if (sta->sta_state != IEEE80211_STA_ASSOC) 1794 return -EINVAL; 1795 break; 1796 default: 1797 WARN(1, "invalid state %d", new_state); 1798 return -EINVAL; 1799 } 1800 1801 sta_dbg(sta->sdata, "moving STA %pM to state %d\n", 1802 sta->sta.addr, new_state); 1803 1804 /* 1805 * notify the driver before the actual changes so it can 1806 * fail the transition 1807 */ 1808 if (test_sta_flag(sta, WLAN_STA_INSERTED)) { 1809 int err = drv_sta_state(sta->local, sta->sdata, sta, 1810 sta->sta_state, new_state); 1811 if (err) 1812 return err; 1813 } 1814 1815 /* reflect the change in all state variables */ 1816 1817 switch (new_state) { 1818 case IEEE80211_STA_NONE: 1819 if (sta->sta_state == IEEE80211_STA_AUTH) 1820 clear_bit(WLAN_STA_AUTH, &sta->_flags); 1821 break; 1822 case IEEE80211_STA_AUTH: 1823 if (sta->sta_state == IEEE80211_STA_NONE) { 1824 set_bit(WLAN_STA_AUTH, &sta->_flags); 1825 } else if (sta->sta_state == IEEE80211_STA_ASSOC) { 1826 clear_bit(WLAN_STA_ASSOC, &sta->_flags); 1827 ieee80211_recalc_min_chandef(sta->sdata); 1828 } 1829 break; 1830 case IEEE80211_STA_ASSOC: 1831 if (sta->sta_state == IEEE80211_STA_AUTH) { 1832 set_bit(WLAN_STA_ASSOC, &sta->_flags); 1833 ieee80211_recalc_min_chandef(sta->sdata); 1834 } else if (sta->sta_state == IEEE80211_STA_AUTHORIZED) { 1835 if (sta->sdata->vif.type == NL80211_IFTYPE_AP || 1836 (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && 1837 !sta->sdata->u.vlan.sta)) 1838 atomic_dec(&sta->sdata->bss->num_mcast_sta); 1839 clear_bit(WLAN_STA_AUTHORIZED, &sta->_flags); 1840 ieee80211_clear_fast_xmit(sta); 1841 } 1842 break; 1843 case IEEE80211_STA_AUTHORIZED: 1844 if (sta->sta_state == IEEE80211_STA_ASSOC) { 1845 if (sta->sdata->vif.type == NL80211_IFTYPE_AP || 1846 (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && 1847 !sta->sdata->u.vlan.sta)) 1848 atomic_inc(&sta->sdata->bss->num_mcast_sta); 1849 set_bit(WLAN_STA_AUTHORIZED, &sta->_flags); 1850 ieee80211_check_fast_xmit(sta); 1851 } 1852 break; 1853 default: 1854 break; 1855 } 1856 1857 sta->sta_state = new_state; 1858 1859 return 0; 1860 } 1861 1862 u8 sta_info_tx_streams(struct sta_info *sta) 1863 { 1864 struct ieee80211_sta_ht_cap *ht_cap = &sta->sta.ht_cap; 1865 u8 rx_streams; 1866 1867 if (!sta->sta.ht_cap.ht_supported) 1868 return 1; 1869 1870 if (sta->sta.vht_cap.vht_supported) { 1871 int i; 1872 u16 tx_mcs_map = 1873 le16_to_cpu(sta->sta.vht_cap.vht_mcs.tx_mcs_map); 1874 1875 for (i = 7; i >= 0; i--) 1876 if ((tx_mcs_map & (0x3 << (i * 2))) != 1877 IEEE80211_VHT_MCS_NOT_SUPPORTED) 1878 return i + 1; 1879 } 1880 1881 if (ht_cap->mcs.rx_mask[3]) 1882 rx_streams = 4; 1883 else if (ht_cap->mcs.rx_mask[2]) 1884 rx_streams = 3; 1885 else if (ht_cap->mcs.rx_mask[1]) 1886 rx_streams = 2; 1887 else 1888 rx_streams = 1; 1889 1890 if (!(ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_RX_DIFF)) 1891 return rx_streams; 1892 1893 return ((ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK) 1894 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT) + 1; 1895 } 1896 1897 static void sta_set_rate_info_rx(struct sta_info *sta, struct rate_info *rinfo) 1898 { 1899 rinfo->flags = 0; 1900 1901 if (sta->rx_stats.last_rate_flag & RX_FLAG_HT) { 1902 rinfo->flags |= RATE_INFO_FLAGS_MCS; 1903 rinfo->mcs = sta->rx_stats.last_rate_idx; 1904 } else if (sta->rx_stats.last_rate_flag & RX_FLAG_VHT) { 1905 rinfo->flags |= RATE_INFO_FLAGS_VHT_MCS; 1906 rinfo->nss = sta->rx_stats.last_rate_vht_nss; 1907 rinfo->mcs = sta->rx_stats.last_rate_idx; 1908 } else { 1909 struct ieee80211_supported_band *sband; 1910 int shift = ieee80211_vif_get_shift(&sta->sdata->vif); 1911 u16 brate; 1912 1913 sband = sta->local->hw.wiphy->bands[ 1914 ieee80211_get_sdata_band(sta->sdata)]; 1915 brate = sband->bitrates[sta->rx_stats.last_rate_idx].bitrate; 1916 rinfo->legacy = DIV_ROUND_UP(brate, 1 << shift); 1917 } 1918 1919 if (sta->rx_stats.last_rate_flag & RX_FLAG_SHORT_GI) 1920 rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI; 1921 1922 if (sta->rx_stats.last_rate_flag & RX_FLAG_5MHZ) 1923 rinfo->bw = RATE_INFO_BW_5; 1924 else if (sta->rx_stats.last_rate_flag & RX_FLAG_10MHZ) 1925 rinfo->bw = RATE_INFO_BW_10; 1926 else if (sta->rx_stats.last_rate_flag & RX_FLAG_40MHZ) 1927 rinfo->bw = RATE_INFO_BW_40; 1928 else if (sta->rx_stats.last_rate_vht_flag & RX_VHT_FLAG_80MHZ) 1929 rinfo->bw = RATE_INFO_BW_80; 1930 else if (sta->rx_stats.last_rate_vht_flag & RX_VHT_FLAG_160MHZ) 1931 rinfo->bw = RATE_INFO_BW_160; 1932 else 1933 rinfo->bw = RATE_INFO_BW_20; 1934 } 1935 1936 void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo) 1937 { 1938 struct ieee80211_sub_if_data *sdata = sta->sdata; 1939 struct ieee80211_local *local = sdata->local; 1940 struct rate_control_ref *ref = NULL; 1941 u32 thr = 0; 1942 int i, ac; 1943 1944 if (test_sta_flag(sta, WLAN_STA_RATE_CONTROL)) 1945 ref = local->rate_ctrl; 1946 1947 sinfo->generation = sdata->local->sta_generation; 1948 1949 /* do before driver, so beacon filtering drivers have a 1950 * chance to e.g. just add the number of filtered beacons 1951 * (or just modify the value entirely, of course) 1952 */ 1953 if (sdata->vif.type == NL80211_IFTYPE_STATION) 1954 sinfo->rx_beacon = sdata->u.mgd.count_beacon_signal; 1955 1956 drv_sta_statistics(local, sdata, &sta->sta, sinfo); 1957 1958 sinfo->filled |= BIT(NL80211_STA_INFO_INACTIVE_TIME) | 1959 BIT(NL80211_STA_INFO_STA_FLAGS) | 1960 BIT(NL80211_STA_INFO_BSS_PARAM) | 1961 BIT(NL80211_STA_INFO_CONNECTED_TIME) | 1962 BIT(NL80211_STA_INFO_RX_DROP_MISC); 1963 1964 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 1965 sinfo->beacon_loss_count = sdata->u.mgd.beacon_loss_count; 1966 sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_LOSS); 1967 } 1968 1969 sinfo->connected_time = ktime_get_seconds() - sta->last_connected; 1970 sinfo->inactive_time = 1971 jiffies_to_msecs(jiffies - sta->rx_stats.last_rx); 1972 1973 if (!(sinfo->filled & (BIT(NL80211_STA_INFO_TX_BYTES64) | 1974 BIT(NL80211_STA_INFO_TX_BYTES)))) { 1975 sinfo->tx_bytes = 0; 1976 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 1977 sinfo->tx_bytes += sta->tx_stats.bytes[ac]; 1978 sinfo->filled |= BIT(NL80211_STA_INFO_TX_BYTES64); 1979 } 1980 1981 if (!(sinfo->filled & BIT(NL80211_STA_INFO_TX_PACKETS))) { 1982 sinfo->tx_packets = 0; 1983 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 1984 sinfo->tx_packets += sta->tx_stats.packets[ac]; 1985 sinfo->filled |= BIT(NL80211_STA_INFO_TX_PACKETS); 1986 } 1987 1988 if (!(sinfo->filled & (BIT(NL80211_STA_INFO_RX_BYTES64) | 1989 BIT(NL80211_STA_INFO_RX_BYTES)))) { 1990 sinfo->rx_bytes = sta->rx_stats.bytes; 1991 sinfo->filled |= BIT(NL80211_STA_INFO_RX_BYTES64); 1992 } 1993 1994 if (!(sinfo->filled & BIT(NL80211_STA_INFO_RX_PACKETS))) { 1995 sinfo->rx_packets = sta->rx_stats.packets; 1996 sinfo->filled |= BIT(NL80211_STA_INFO_RX_PACKETS); 1997 } 1998 1999 if (!(sinfo->filled & BIT(NL80211_STA_INFO_TX_RETRIES))) { 2000 sinfo->tx_retries = sta->status_stats.retry_count; 2001 sinfo->filled |= BIT(NL80211_STA_INFO_TX_RETRIES); 2002 } 2003 2004 if (!(sinfo->filled & BIT(NL80211_STA_INFO_TX_FAILED))) { 2005 sinfo->tx_failed = sta->status_stats.retry_failed; 2006 sinfo->filled |= BIT(NL80211_STA_INFO_TX_FAILED); 2007 } 2008 2009 sinfo->rx_dropped_misc = sta->rx_stats.dropped; 2010 2011 if (sdata->vif.type == NL80211_IFTYPE_STATION && 2012 !(sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)) { 2013 sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_RX) | 2014 BIT(NL80211_STA_INFO_BEACON_SIGNAL_AVG); 2015 sinfo->rx_beacon_signal_avg = ieee80211_ave_rssi(&sdata->vif); 2016 } 2017 2018 if (ieee80211_hw_check(&sta->local->hw, SIGNAL_DBM) || 2019 ieee80211_hw_check(&sta->local->hw, SIGNAL_UNSPEC)) { 2020 if (!(sinfo->filled & BIT(NL80211_STA_INFO_SIGNAL))) { 2021 sinfo->signal = (s8)sta->rx_stats.last_signal; 2022 sinfo->filled |= BIT(NL80211_STA_INFO_SIGNAL); 2023 } 2024 2025 if (!(sinfo->filled & BIT(NL80211_STA_INFO_SIGNAL_AVG))) { 2026 sinfo->signal_avg = 2027 -ewma_signal_read(&sta->rx_stats.avg_signal); 2028 sinfo->filled |= BIT(NL80211_STA_INFO_SIGNAL_AVG); 2029 } 2030 } 2031 2032 if (sta->rx_stats.chains && 2033 !(sinfo->filled & (BIT(NL80211_STA_INFO_CHAIN_SIGNAL) | 2034 BIT(NL80211_STA_INFO_CHAIN_SIGNAL_AVG)))) { 2035 sinfo->filled |= BIT(NL80211_STA_INFO_CHAIN_SIGNAL) | 2036 BIT(NL80211_STA_INFO_CHAIN_SIGNAL_AVG); 2037 2038 sinfo->chains = sta->rx_stats.chains; 2039 for (i = 0; i < ARRAY_SIZE(sinfo->chain_signal); i++) { 2040 sinfo->chain_signal[i] = 2041 sta->rx_stats.chain_signal_last[i]; 2042 sinfo->chain_signal_avg[i] = 2043 -ewma_signal_read(&sta->rx_stats.chain_signal_avg[i]); 2044 } 2045 } 2046 2047 if (!(sinfo->filled & BIT(NL80211_STA_INFO_TX_BITRATE))) { 2048 sta_set_rate_info_tx(sta, &sta->tx_stats.last_rate, 2049 &sinfo->txrate); 2050 sinfo->filled |= BIT(NL80211_STA_INFO_TX_BITRATE); 2051 } 2052 2053 if (!(sinfo->filled & BIT(NL80211_STA_INFO_RX_BITRATE))) { 2054 sta_set_rate_info_rx(sta, &sinfo->rxrate); 2055 sinfo->filled |= BIT(NL80211_STA_INFO_RX_BITRATE); 2056 } 2057 2058 sinfo->filled |= BIT(NL80211_STA_INFO_TID_STATS); 2059 for (i = 0; i < IEEE80211_NUM_TIDS + 1; i++) { 2060 struct cfg80211_tid_stats *tidstats = &sinfo->pertid[i]; 2061 2062 if (!(tidstats->filled & BIT(NL80211_TID_STATS_RX_MSDU))) { 2063 tidstats->filled |= BIT(NL80211_TID_STATS_RX_MSDU); 2064 tidstats->rx_msdu = sta->rx_stats.msdu[i]; 2065 } 2066 2067 if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU))) { 2068 tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU); 2069 tidstats->tx_msdu = sta->tx_stats.msdu[i]; 2070 } 2071 2072 if (!(tidstats->filled & 2073 BIT(NL80211_TID_STATS_TX_MSDU_RETRIES)) && 2074 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 2075 tidstats->filled |= 2076 BIT(NL80211_TID_STATS_TX_MSDU_RETRIES); 2077 tidstats->tx_msdu_retries = 2078 sta->status_stats.msdu_retries[i]; 2079 } 2080 2081 if (!(tidstats->filled & 2082 BIT(NL80211_TID_STATS_TX_MSDU_FAILED)) && 2083 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 2084 tidstats->filled |= 2085 BIT(NL80211_TID_STATS_TX_MSDU_FAILED); 2086 tidstats->tx_msdu_failed = 2087 sta->status_stats.msdu_failed[i]; 2088 } 2089 } 2090 2091 if (ieee80211_vif_is_mesh(&sdata->vif)) { 2092 #ifdef CONFIG_MAC80211_MESH 2093 sinfo->filled |= BIT(NL80211_STA_INFO_LLID) | 2094 BIT(NL80211_STA_INFO_PLID) | 2095 BIT(NL80211_STA_INFO_PLINK_STATE) | 2096 BIT(NL80211_STA_INFO_LOCAL_PM) | 2097 BIT(NL80211_STA_INFO_PEER_PM) | 2098 BIT(NL80211_STA_INFO_NONPEER_PM); 2099 2100 sinfo->llid = sta->mesh->llid; 2101 sinfo->plid = sta->mesh->plid; 2102 sinfo->plink_state = sta->mesh->plink_state; 2103 if (test_sta_flag(sta, WLAN_STA_TOFFSET_KNOWN)) { 2104 sinfo->filled |= BIT(NL80211_STA_INFO_T_OFFSET); 2105 sinfo->t_offset = sta->mesh->t_offset; 2106 } 2107 sinfo->local_pm = sta->mesh->local_pm; 2108 sinfo->peer_pm = sta->mesh->peer_pm; 2109 sinfo->nonpeer_pm = sta->mesh->nonpeer_pm; 2110 #endif 2111 } 2112 2113 sinfo->bss_param.flags = 0; 2114 if (sdata->vif.bss_conf.use_cts_prot) 2115 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_CTS_PROT; 2116 if (sdata->vif.bss_conf.use_short_preamble) 2117 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_PREAMBLE; 2118 if (sdata->vif.bss_conf.use_short_slot) 2119 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_SLOT_TIME; 2120 sinfo->bss_param.dtim_period = sdata->vif.bss_conf.dtim_period; 2121 sinfo->bss_param.beacon_interval = sdata->vif.bss_conf.beacon_int; 2122 2123 sinfo->sta_flags.set = 0; 2124 sinfo->sta_flags.mask = BIT(NL80211_STA_FLAG_AUTHORIZED) | 2125 BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) | 2126 BIT(NL80211_STA_FLAG_WME) | 2127 BIT(NL80211_STA_FLAG_MFP) | 2128 BIT(NL80211_STA_FLAG_AUTHENTICATED) | 2129 BIT(NL80211_STA_FLAG_ASSOCIATED) | 2130 BIT(NL80211_STA_FLAG_TDLS_PEER); 2131 if (test_sta_flag(sta, WLAN_STA_AUTHORIZED)) 2132 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHORIZED); 2133 if (test_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE)) 2134 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE); 2135 if (sta->sta.wme) 2136 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_WME); 2137 if (test_sta_flag(sta, WLAN_STA_MFP)) 2138 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_MFP); 2139 if (test_sta_flag(sta, WLAN_STA_AUTH)) 2140 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHENTICATED); 2141 if (test_sta_flag(sta, WLAN_STA_ASSOC)) 2142 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_ASSOCIATED); 2143 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER)) 2144 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_TDLS_PEER); 2145 2146 /* check if the driver has a SW RC implementation */ 2147 if (ref && ref->ops->get_expected_throughput) 2148 thr = ref->ops->get_expected_throughput(sta->rate_ctrl_priv); 2149 else 2150 thr = drv_get_expected_throughput(local, &sta->sta); 2151 2152 if (thr != 0) { 2153 sinfo->filled |= BIT(NL80211_STA_INFO_EXPECTED_THROUGHPUT); 2154 sinfo->expected_throughput = thr; 2155 } 2156 } 2157