Commit | Line | Data |
---|---|---|
f0706e82 JB |
1 | /* |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
d98ad83e | 4 | * Copyright 2013-2014 Intel Mobile Communications GmbH |
0ead2510 | 5 | * Copyright (C) 2015 Intel Deutschland GmbH |
f0706e82 JB |
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> | |
888d04df | 14 | #include <linux/etherdevice.h> |
f0706e82 JB |
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> | |
0d174406 | 20 | #include <linux/timer.h> |
d0709a65 | 21 | #include <linux/rtnetlink.h> |
f0706e82 JB |
22 | |
23 | #include <net/mac80211.h> | |
24 | #include "ieee80211_i.h" | |
24487981 | 25 | #include "driver-ops.h" |
2c8dccc7 | 26 | #include "rate.h" |
f0706e82 | 27 | #include "sta_info.h" |
e9f207f0 | 28 | #include "debugfs_sta.h" |
ee385855 | 29 | #include "mesh.h" |
ce662b44 | 30 | #include "wme.h" |
f0706e82 | 31 | |
d0709a65 JB |
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 | * | |
34e89507 JB |
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. | |
93e5deb1 JB |
47 | * |
48 | * When the insertion fails (sta_info_insert()) returns non-zero), the | |
49 | * structure will have been freed by sta_info_insert()! | |
d0709a65 | 50 | * |
34e89507 | 51 | * Station entries are added by mac80211 when you establish a link with a |
7e189a12 LR |
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 | |
25985edc | 54 | * receive an association response from the AP. For IBSS this occurs when |
34e89507 | 55 | * get to know about a peer on the same IBSS. For WDS we add the sta for |
25985edc | 56 | * the peer immediately upon device open. When using AP mode we add stations |
34e89507 | 57 | * for each respective station upon request from userspace through nl80211. |
7e189a12 | 58 | * |
34e89507 JB |
59 | * In order to remove a STA info structure, various sta_info_destroy_*() |
60 | * calls are available. | |
d0709a65 | 61 | * |
34e89507 JB |
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. | |
d0709a65 | 66 | */ |
f0706e82 | 67 | |
7bedd0cf JB |
68 | static const struct rhashtable_params sta_rht_params = { |
69 | .nelem_hint = 3, /* start small */ | |
caf22d31 | 70 | .automatic_shrinking = true, |
7bedd0cf | 71 | .head_offset = offsetof(struct sta_info, hash_node), |
ac100ce5 | 72 | .key_offset = offsetof(struct sta_info, addr), |
7bedd0cf JB |
73 | .key_len = ETH_ALEN, |
74 | .hashfn = sta_addr_hash, | |
ebd82b39 | 75 | .max_size = CONFIG_MAC80211_STA_HASH_MAX_SIZE, |
7bedd0cf JB |
76 | }; |
77 | ||
4d33960b | 78 | /* Caller must hold local->sta_mtx */ |
be8755e1 MW |
79 | static int sta_info_hash_del(struct ieee80211_local *local, |
80 | struct sta_info *sta) | |
f0706e82 | 81 | { |
7bedd0cf JB |
82 | return rhashtable_remove_fast(&local->sta_hash, &sta->hash_node, |
83 | sta_rht_params); | |
f0706e82 JB |
84 | } |
85 | ||
5108ca82 | 86 | static void __cleanup_single_sta(struct sta_info *sta) |
b22cfcfc | 87 | { |
b22cfcfc EP |
88 | int ac, i; |
89 | struct tid_ampdu_tx *tid_tx; | |
90 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
91 | struct ieee80211_local *local = sdata->local; | |
d012a605 | 92 | struct ps_data *ps; |
b22cfcfc | 93 | |
e3685e03 | 94 | if (test_sta_flag(sta, WLAN_STA_PS_STA) || |
5ac2e350 JB |
95 | test_sta_flag(sta, WLAN_STA_PS_DRIVER) || |
96 | test_sta_flag(sta, WLAN_STA_PS_DELIVER)) { | |
d012a605 MP |
97 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP || |
98 | sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
99 | ps = &sdata->bss->ps; | |
3f52b7e3 MP |
100 | else if (ieee80211_vif_is_mesh(&sdata->vif)) |
101 | ps = &sdata->u.mesh.ps; | |
d012a605 MP |
102 | else |
103 | return; | |
b22cfcfc EP |
104 | |
105 | clear_sta_flag(sta, WLAN_STA_PS_STA); | |
e3685e03 | 106 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); |
5ac2e350 | 107 | clear_sta_flag(sta, WLAN_STA_PS_DELIVER); |
b22cfcfc | 108 | |
d012a605 | 109 | atomic_dec(&ps->num_sta_ps); |
b22cfcfc EP |
110 | } |
111 | ||
ba8c3d6f FF |
112 | if (sta->sta.txq[0]) { |
113 | for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) { | |
114 | struct txq_info *txqi = to_txq_info(sta->sta.txq[i]); | |
115 | int n = skb_queue_len(&txqi->queue); | |
116 | ||
117 | ieee80211_purge_tx_queue(&local->hw, &txqi->queue); | |
118 | atomic_sub(n, &sdata->txqs_len[txqi->txq.ac]); | |
119 | } | |
120 | } | |
121 | ||
b22cfcfc EP |
122 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { |
123 | local->total_ps_buffered -= skb_queue_len(&sta->ps_tx_buf[ac]); | |
1f98ab7f FF |
124 | ieee80211_purge_tx_queue(&local->hw, &sta->ps_tx_buf[ac]); |
125 | ieee80211_purge_tx_queue(&local->hw, &sta->tx_filtered[ac]); | |
b22cfcfc EP |
126 | } |
127 | ||
45b5028e TP |
128 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
129 | mesh_sta_cleanup(sta); | |
b22cfcfc | 130 | |
5ac2e350 | 131 | cancel_work_sync(&sta->drv_deliver_wk); |
b22cfcfc EP |
132 | |
133 | /* | |
134 | * Destroy aggregation state here. It would be nice to wait for the | |
135 | * driver to finish aggregation stop and then clean up, but for now | |
136 | * drivers have to handle aggregation stop being requested, followed | |
137 | * directly by station destruction. | |
138 | */ | |
5a306f58 | 139 | for (i = 0; i < IEEE80211_NUM_TIDS; i++) { |
661eb381 | 140 | kfree(sta->ampdu_mlme.tid_start_tx[i]); |
b22cfcfc EP |
141 | tid_tx = rcu_dereference_raw(sta->ampdu_mlme.tid_tx[i]); |
142 | if (!tid_tx) | |
143 | continue; | |
1f98ab7f | 144 | ieee80211_purge_tx_queue(&local->hw, &tid_tx->pending); |
b22cfcfc EP |
145 | kfree(tid_tx); |
146 | } | |
5108ca82 | 147 | } |
b22cfcfc | 148 | |
5108ca82 JB |
149 | static void cleanup_single_sta(struct sta_info *sta) |
150 | { | |
151 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
152 | struct ieee80211_local *local = sdata->local; | |
153 | ||
154 | __cleanup_single_sta(sta); | |
b22cfcfc EP |
155 | sta_info_free(local, sta); |
156 | } | |
157 | ||
d0709a65 | 158 | /* protected by RCU */ |
abe60632 JB |
159 | struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata, |
160 | const u8 *addr) | |
f0706e82 | 161 | { |
abe60632 | 162 | struct ieee80211_local *local = sdata->local; |
60f4b626 JB |
163 | struct sta_info *sta; |
164 | struct rhash_head *tmp; | |
165 | const struct bucket_table *tbl; | |
f0706e82 | 166 | |
60f4b626 JB |
167 | rcu_read_lock(); |
168 | tbl = rht_dereference_rcu(local->sta_hash.tbl, &local->sta_hash); | |
f0706e82 | 169 | |
60f4b626 JB |
170 | for_each_sta_info(local, tbl, addr, sta, tmp) { |
171 | if (sta->sdata == sdata) { | |
172 | rcu_read_unlock(); | |
173 | /* this is safe as the caller must already hold | |
174 | * another rcu read section or the mutex | |
175 | */ | |
176 | return sta; | |
177 | } | |
178 | } | |
179 | rcu_read_unlock(); | |
180 | return NULL; | |
43ba7e95 JB |
181 | } |
182 | ||
0e5ded5a FF |
183 | /* |
184 | * Get sta info either from the specified interface | |
185 | * or from one of its vlans | |
186 | */ | |
187 | struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata, | |
188 | const u8 *addr) | |
189 | { | |
190 | struct ieee80211_local *local = sdata->local; | |
191 | struct sta_info *sta; | |
7bedd0cf JB |
192 | struct rhash_head *tmp; |
193 | const struct bucket_table *tbl; | |
0e5ded5a | 194 | |
7bedd0cf JB |
195 | rcu_read_lock(); |
196 | tbl = rht_dereference_rcu(local->sta_hash.tbl, &local->sta_hash); | |
197 | ||
198 | for_each_sta_info(local, tbl, addr, sta, tmp) { | |
199 | if (sta->sdata == sdata || | |
200 | (sta->sdata->bss && sta->sdata->bss == sdata->bss)) { | |
201 | rcu_read_unlock(); | |
202 | /* this is safe as the caller must already hold | |
203 | * another rcu read section or the mutex | |
204 | */ | |
205 | return sta; | |
206 | } | |
0e5ded5a | 207 | } |
7bedd0cf JB |
208 | rcu_read_unlock(); |
209 | return NULL; | |
0e5ded5a FF |
210 | } |
211 | ||
3b53fde8 JB |
212 | struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata, |
213 | int idx) | |
ee385855 | 214 | { |
3b53fde8 | 215 | struct ieee80211_local *local = sdata->local; |
ee385855 LCC |
216 | struct sta_info *sta; |
217 | int i = 0; | |
218 | ||
d0709a65 | 219 | list_for_each_entry_rcu(sta, &local->sta_list, list) { |
3b53fde8 | 220 | if (sdata != sta->sdata) |
2a8ca29a | 221 | continue; |
ee385855 LCC |
222 | if (i < idx) { |
223 | ++i; | |
224 | continue; | |
ee385855 | 225 | } |
2a8ca29a | 226 | return sta; |
ee385855 | 227 | } |
ee385855 LCC |
228 | |
229 | return NULL; | |
230 | } | |
f0706e82 | 231 | |
93e5deb1 | 232 | /** |
d9a7ddb0 | 233 | * sta_info_free - free STA |
93e5deb1 | 234 | * |
6ef307bc | 235 | * @local: pointer to the global information |
93e5deb1 JB |
236 | * @sta: STA info to free |
237 | * | |
238 | * This function must undo everything done by sta_info_alloc() | |
d9a7ddb0 JB |
239 | * that may happen before sta_info_insert(). It may only be |
240 | * called when sta_info_insert() has not been attempted (and | |
241 | * if that fails, the station is freed anyway.) | |
93e5deb1 | 242 | */ |
d9a7ddb0 | 243 | void sta_info_free(struct ieee80211_local *local, struct sta_info *sta) |
93e5deb1 | 244 | { |
889cbb91 | 245 | if (sta->rate_ctrl) |
af65cd96 | 246 | rate_control_free_sta(sta); |
93e5deb1 | 247 | |
bdcbd8e0 | 248 | sta_dbg(sta->sdata, "Destroyed STA %pM\n", sta->sta.addr); |
93e5deb1 | 249 | |
ba8c3d6f FF |
250 | if (sta->sta.txq[0]) |
251 | kfree(to_txq_info(sta->sta.txq[0])); | |
53d04525 | 252 | kfree(rcu_dereference_raw(sta->sta.rates)); |
433f5bc1 JB |
253 | #ifdef CONFIG_MAC80211_MESH |
254 | kfree(sta->mesh); | |
255 | #endif | |
93e5deb1 JB |
256 | kfree(sta); |
257 | } | |
258 | ||
4d33960b | 259 | /* Caller must hold local->sta_mtx */ |
d0709a65 JB |
260 | static void sta_info_hash_add(struct ieee80211_local *local, |
261 | struct sta_info *sta) | |
f0706e82 | 262 | { |
7bedd0cf JB |
263 | rhashtable_insert_fast(&local->sta_hash, &sta->hash_node, |
264 | sta_rht_params); | |
f0706e82 | 265 | } |
f0706e82 | 266 | |
5ac2e350 | 267 | static void sta_deliver_ps_frames(struct work_struct *wk) |
af818581 JB |
268 | { |
269 | struct sta_info *sta; | |
270 | ||
5ac2e350 | 271 | sta = container_of(wk, struct sta_info, drv_deliver_wk); |
af818581 JB |
272 | |
273 | if (sta->dead) | |
274 | return; | |
275 | ||
5ac2e350 JB |
276 | local_bh_disable(); |
277 | if (!test_sta_flag(sta, WLAN_STA_PS_STA)) | |
af818581 | 278 | ieee80211_sta_ps_deliver_wakeup(sta); |
5ac2e350 | 279 | else if (test_and_clear_sta_flag(sta, WLAN_STA_PSPOLL)) |
af818581 | 280 | ieee80211_sta_ps_deliver_poll_response(sta); |
5ac2e350 | 281 | else if (test_and_clear_sta_flag(sta, WLAN_STA_UAPSD)) |
47086fc5 | 282 | ieee80211_sta_ps_deliver_uapsd(sta); |
5ac2e350 | 283 | local_bh_enable(); |
af818581 JB |
284 | } |
285 | ||
af65cd96 JB |
286 | static int sta_prepare_rate_control(struct ieee80211_local *local, |
287 | struct sta_info *sta, gfp_t gfp) | |
288 | { | |
30686bf7 | 289 | if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) |
af65cd96 JB |
290 | return 0; |
291 | ||
889cbb91 | 292 | sta->rate_ctrl = local->rate_ctrl; |
af65cd96 | 293 | sta->rate_ctrl_priv = rate_control_alloc_sta(sta->rate_ctrl, |
35c347ac | 294 | sta, gfp); |
889cbb91 | 295 | if (!sta->rate_ctrl_priv) |
af65cd96 | 296 | return -ENOMEM; |
af65cd96 JB |
297 | |
298 | return 0; | |
299 | } | |
300 | ||
73651ee6 | 301 | struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata, |
56544160 | 302 | const u8 *addr, gfp_t gfp) |
f0706e82 | 303 | { |
d0709a65 | 304 | struct ieee80211_local *local = sdata->local; |
ba8c3d6f | 305 | struct ieee80211_hw *hw = &local->hw; |
f0706e82 | 306 | struct sta_info *sta; |
16c5f15c | 307 | int i; |
f0706e82 | 308 | |
ba8c3d6f | 309 | sta = kzalloc(sizeof(*sta) + hw->sta_data_size, gfp); |
f0706e82 | 310 | if (!sta) |
73651ee6 | 311 | return NULL; |
f0706e82 | 312 | |
07346f81 | 313 | spin_lock_init(&sta->lock); |
1d147bfa | 314 | spin_lock_init(&sta->ps_lock); |
5ac2e350 | 315 | INIT_WORK(&sta->drv_deliver_wk, sta_deliver_ps_frames); |
67c282c0 | 316 | INIT_WORK(&sta->ampdu_mlme.work, ieee80211_ba_session_work); |
a93e3644 | 317 | mutex_init(&sta->ampdu_mlme.mtx); |
87f59c70 | 318 | #ifdef CONFIG_MAC80211_MESH |
433f5bc1 JB |
319 | if (ieee80211_vif_is_mesh(&sdata->vif)) { |
320 | sta->mesh = kzalloc(sizeof(*sta->mesh), gfp); | |
321 | if (!sta->mesh) | |
322 | goto free; | |
323 | spin_lock_init(&sta->mesh->plink_lock); | |
324 | if (ieee80211_vif_is_mesh(&sdata->vif) && | |
325 | !sdata->u.mesh.user_mpm) | |
326 | init_timer(&sta->mesh->plink_timer); | |
327 | sta->mesh->nonpeer_pm = NL80211_MESH_POWER_ACTIVE; | |
328 | } | |
87f59c70 | 329 | #endif |
07346f81 | 330 | |
ac100ce5 | 331 | memcpy(sta->addr, addr, ETH_ALEN); |
17741cdc | 332 | memcpy(sta->sta.addr, addr, ETH_ALEN); |
d0709a65 JB |
333 | sta->local = local; |
334 | sta->sdata = sdata; | |
e5a9f8d0 | 335 | sta->rx_stats.last_rx = jiffies; |
f0706e82 | 336 | |
71ec375c JB |
337 | sta->sta_state = IEEE80211_STA_NONE; |
338 | ||
b6da911b LK |
339 | /* Mark TID as unreserved */ |
340 | sta->reserved_tid = IEEE80211_TID_UNRESERVED; | |
341 | ||
84b00607 | 342 | sta->last_connected = ktime_get_seconds(); |
e5a9f8d0 JB |
343 | ewma_signal_init(&sta->rx_stats.avg_signal); |
344 | for (i = 0; i < ARRAY_SIZE(sta->rx_stats.chain_signal_avg); i++) | |
345 | ewma_signal_init(&sta->rx_stats.chain_signal_avg[i]); | |
541a45a1 | 346 | |
ba8c3d6f FF |
347 | if (local->ops->wake_tx_queue) { |
348 | void *txq_data; | |
349 | int size = sizeof(struct txq_info) + | |
350 | ALIGN(hw->txq_data_size, sizeof(void *)); | |
351 | ||
352 | txq_data = kcalloc(ARRAY_SIZE(sta->sta.txq), size, gfp); | |
353 | if (!txq_data) | |
354 | goto free; | |
355 | ||
356 | for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) { | |
357 | struct txq_info *txq = txq_data + i * size; | |
358 | ||
359 | ieee80211_init_tx_queue(sdata, sta, txq, i); | |
360 | } | |
abfbc3af | 361 | } |
f0706e82 | 362 | |
ba8c3d6f FF |
363 | if (sta_prepare_rate_control(local, sta, gfp)) |
364 | goto free_txq; | |
365 | ||
5a306f58 | 366 | for (i = 0; i < IEEE80211_NUM_TIDS; i++) { |
a622ab72 JB |
367 | /* |
368 | * timer_to_tid must be initialized with identity mapping | |
369 | * to enable session_timer's data differentiation. See | |
370 | * sta_rx_agg_session_timer_expired for usage. | |
371 | */ | |
16c5f15c | 372 | sta->timer_to_tid[i] = i; |
16c5f15c | 373 | } |
948d887d JB |
374 | for (i = 0; i < IEEE80211_NUM_ACS; i++) { |
375 | skb_queue_head_init(&sta->ps_tx_buf[i]); | |
376 | skb_queue_head_init(&sta->tx_filtered[i]); | |
377 | } | |
73651ee6 | 378 | |
5a306f58 | 379 | for (i = 0; i < IEEE80211_NUM_TIDS; i++) |
4be929be | 380 | sta->last_seq_ctrl[i] = cpu_to_le16(USHRT_MAX); |
cccaec98 | 381 | |
af0ed69b | 382 | sta->sta.smps_mode = IEEE80211_SMPS_OFF; |
687da132 EG |
383 | if (sdata->vif.type == NL80211_IFTYPE_AP || |
384 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { | |
385 | struct ieee80211_supported_band *sband = | |
ba8c3d6f | 386 | hw->wiphy->bands[ieee80211_get_sdata_band(sdata)]; |
687da132 EG |
387 | u8 smps = (sband->ht_cap.cap & IEEE80211_HT_CAP_SM_PS) >> |
388 | IEEE80211_HT_CAP_SM_PS_SHIFT; | |
389 | /* | |
390 | * Assume that hostapd advertises our caps in the beacon and | |
391 | * this is the known_smps_mode for a station that just assciated | |
392 | */ | |
393 | switch (smps) { | |
394 | case WLAN_HT_SMPS_CONTROL_DISABLED: | |
395 | sta->known_smps_mode = IEEE80211_SMPS_OFF; | |
396 | break; | |
397 | case WLAN_HT_SMPS_CONTROL_STATIC: | |
398 | sta->known_smps_mode = IEEE80211_SMPS_STATIC; | |
399 | break; | |
400 | case WLAN_HT_SMPS_CONTROL_DYNAMIC: | |
401 | sta->known_smps_mode = IEEE80211_SMPS_DYNAMIC; | |
402 | break; | |
403 | default: | |
404 | WARN_ON(1); | |
405 | } | |
406 | } | |
af0ed69b | 407 | |
bdcbd8e0 | 408 | sta_dbg(sdata, "Allocated STA %pM\n", sta->sta.addr); |
ef04a297 | 409 | |
abfbc3af | 410 | return sta; |
ba8c3d6f FF |
411 | |
412 | free_txq: | |
413 | if (sta->sta.txq[0]) | |
414 | kfree(to_txq_info(sta->sta.txq[0])); | |
415 | free: | |
433f5bc1 JB |
416 | #ifdef CONFIG_MAC80211_MESH |
417 | kfree(sta->mesh); | |
418 | #endif | |
ba8c3d6f FF |
419 | kfree(sta); |
420 | return NULL; | |
73651ee6 JB |
421 | } |
422 | ||
8c71df7a | 423 | static int sta_info_insert_check(struct sta_info *sta) |
34e89507 | 424 | { |
34e89507 | 425 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
34e89507 | 426 | |
03e4497e JB |
427 | /* |
428 | * Can't be a WARN_ON because it can be triggered through a race: | |
429 | * something inserts a STA (on one CPU) without holding the RTNL | |
430 | * and another CPU turns off the net device. | |
431 | */ | |
8c71df7a GE |
432 | if (unlikely(!ieee80211_sdata_running(sdata))) |
433 | return -ENETDOWN; | |
03e4497e | 434 | |
b203ca39 | 435 | if (WARN_ON(ether_addr_equal(sta->sta.addr, sdata->vif.addr) || |
8c71df7a GE |
436 | is_multicast_ether_addr(sta->sta.addr))) |
437 | return -EINVAL; | |
438 | ||
31104891 JB |
439 | /* Strictly speaking this isn't necessary as we hold the mutex, but |
440 | * the rhashtable code can't really deal with that distinction. We | |
441 | * do require the mutex for correctness though. | |
442 | */ | |
443 | rcu_read_lock(); | |
444 | lockdep_assert_held(&sdata->local->sta_mtx); | |
445 | if (ieee80211_hw_check(&sdata->local->hw, NEEDS_UNIQUE_STA_ADDR) && | |
446 | ieee80211_find_sta_by_ifaddr(&sdata->local->hw, sta->addr, NULL)) { | |
447 | rcu_read_unlock(); | |
448 | return -ENOTUNIQ; | |
449 | } | |
450 | rcu_read_unlock(); | |
451 | ||
8c71df7a GE |
452 | return 0; |
453 | } | |
454 | ||
f09603a2 JB |
455 | static int sta_info_insert_drv_state(struct ieee80211_local *local, |
456 | struct ieee80211_sub_if_data *sdata, | |
457 | struct sta_info *sta) | |
458 | { | |
459 | enum ieee80211_sta_state state; | |
460 | int err = 0; | |
461 | ||
462 | for (state = IEEE80211_STA_NOTEXIST; state < sta->sta_state; state++) { | |
463 | err = drv_sta_state(local, sdata, sta, state, state + 1); | |
464 | if (err) | |
465 | break; | |
466 | } | |
467 | ||
468 | if (!err) { | |
a4ec45a4 JB |
469 | /* |
470 | * Drivers using legacy sta_add/sta_remove callbacks only | |
471 | * get uploaded set to true after sta_add is called. | |
472 | */ | |
473 | if (!local->ops->sta_add) | |
474 | sta->uploaded = true; | |
f09603a2 JB |
475 | return 0; |
476 | } | |
477 | ||
478 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { | |
bdcbd8e0 JB |
479 | sdata_info(sdata, |
480 | "failed to move IBSS STA %pM to state %d (%d) - keeping it anyway\n", | |
481 | sta->sta.addr, state + 1, err); | |
f09603a2 JB |
482 | err = 0; |
483 | } | |
484 | ||
485 | /* unwind on error */ | |
486 | for (; state > IEEE80211_STA_NOTEXIST; state--) | |
487 | WARN_ON(drv_sta_state(local, sdata, sta, state, state - 1)); | |
488 | ||
489 | return err; | |
490 | } | |
491 | ||
8c71df7a GE |
492 | /* |
493 | * should be called with sta_mtx locked | |
494 | * this function replaces the mutex lock | |
495 | * with a RCU lock | |
496 | */ | |
4d33960b | 497 | static int sta_info_insert_finish(struct sta_info *sta) __acquires(RCU) |
8c71df7a GE |
498 | { |
499 | struct ieee80211_local *local = sta->local; | |
500 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
7852e361 | 501 | struct station_info sinfo; |
8c71df7a GE |
502 | int err = 0; |
503 | ||
504 | lockdep_assert_held(&local->sta_mtx); | |
34e89507 | 505 | |
7852e361 JB |
506 | /* check if STA exists already */ |
507 | if (sta_info_get_bss(sdata, sta->sta.addr)) { | |
508 | err = -EEXIST; | |
509 | goto out_err; | |
4d33960b | 510 | } |
32bfd35d | 511 | |
7852e361 JB |
512 | local->num_sta++; |
513 | local->sta_generation++; | |
514 | smp_mb(); | |
4d33960b | 515 | |
5108ca82 JB |
516 | /* simplify things and don't accept BA sessions yet */ |
517 | set_sta_flag(sta, WLAN_STA_BLOCK_BA); | |
518 | ||
7852e361 JB |
519 | /* make the station visible */ |
520 | sta_info_hash_add(local, sta); | |
83d5cc01 | 521 | |
2bad7748 | 522 | list_add_tail_rcu(&sta->list, &local->sta_list); |
4d33960b | 523 | |
5108ca82 JB |
524 | /* notify driver */ |
525 | err = sta_info_insert_drv_state(local, sdata, sta); | |
526 | if (err) | |
527 | goto out_remove; | |
528 | ||
7852e361 | 529 | set_sta_flag(sta, WLAN_STA_INSERTED); |
5108ca82 JB |
530 | /* accept BA sessions now */ |
531 | clear_sta_flag(sta, WLAN_STA_BLOCK_BA); | |
4d33960b | 532 | |
21f659bf | 533 | ieee80211_recalc_min_chandef(sdata); |
7852e361 JB |
534 | ieee80211_sta_debugfs_add(sta); |
535 | rate_control_add_sta_debugfs(sta); | |
4d33960b | 536 | |
7852e361 JB |
537 | memset(&sinfo, 0, sizeof(sinfo)); |
538 | sinfo.filled = 0; | |
539 | sinfo.generation = local->sta_generation; | |
540 | cfg80211_new_sta(sdata->dev, sta->sta.addr, &sinfo, GFP_KERNEL); | |
d0709a65 | 541 | |
bdcbd8e0 | 542 | sta_dbg(sdata, "Inserted STA %pM\n", sta->sta.addr); |
f0706e82 | 543 | |
34e89507 JB |
544 | /* move reference to rcu-protected */ |
545 | rcu_read_lock(); | |
546 | mutex_unlock(&local->sta_mtx); | |
e9f207f0 | 547 | |
73651ee6 JB |
548 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
549 | mesh_accept_plinks_update(sdata); | |
550 | ||
8c71df7a | 551 | return 0; |
5108ca82 JB |
552 | out_remove: |
553 | sta_info_hash_del(local, sta); | |
554 | list_del_rcu(&sta->list); | |
555 | local->num_sta--; | |
556 | synchronize_net(); | |
557 | __cleanup_single_sta(sta); | |
4d33960b JB |
558 | out_err: |
559 | mutex_unlock(&local->sta_mtx); | |
560 | rcu_read_lock(); | |
561 | return err; | |
8c71df7a GE |
562 | } |
563 | ||
564 | int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU) | |
565 | { | |
566 | struct ieee80211_local *local = sta->local; | |
308f7fcf | 567 | int err; |
8c71df7a | 568 | |
4d33960b JB |
569 | might_sleep(); |
570 | ||
31104891 JB |
571 | mutex_lock(&local->sta_mtx); |
572 | ||
8c71df7a GE |
573 | err = sta_info_insert_check(sta); |
574 | if (err) { | |
31104891 | 575 | mutex_unlock(&local->sta_mtx); |
8c71df7a GE |
576 | rcu_read_lock(); |
577 | goto out_free; | |
578 | } | |
579 | ||
4d33960b | 580 | err = sta_info_insert_finish(sta); |
8c71df7a GE |
581 | if (err) |
582 | goto out_free; | |
583 | ||
73651ee6 | 584 | return 0; |
93e5deb1 | 585 | out_free: |
d9a7ddb0 | 586 | sta_info_free(local, sta); |
93e5deb1 | 587 | return err; |
f0706e82 JB |
588 | } |
589 | ||
34e89507 JB |
590 | int sta_info_insert(struct sta_info *sta) |
591 | { | |
592 | int err = sta_info_insert_rcu(sta); | |
593 | ||
594 | rcu_read_unlock(); | |
595 | ||
596 | return err; | |
597 | } | |
598 | ||
d012a605 | 599 | static inline void __bss_tim_set(u8 *tim, u16 id) |
004c872e JB |
600 | { |
601 | /* | |
602 | * This format has been mandated by the IEEE specifications, | |
603 | * so this line may not be changed to use the __set_bit() format. | |
604 | */ | |
d012a605 | 605 | tim[id / 8] |= (1 << (id % 8)); |
004c872e JB |
606 | } |
607 | ||
d012a605 | 608 | static inline void __bss_tim_clear(u8 *tim, u16 id) |
004c872e JB |
609 | { |
610 | /* | |
611 | * This format has been mandated by the IEEE specifications, | |
612 | * so this line may not be changed to use the __clear_bit() format. | |
613 | */ | |
d012a605 | 614 | tim[id / 8] &= ~(1 << (id % 8)); |
004c872e JB |
615 | } |
616 | ||
3d5839b6 IP |
617 | static inline bool __bss_tim_get(u8 *tim, u16 id) |
618 | { | |
619 | /* | |
620 | * This format has been mandated by the IEEE specifications, | |
621 | * so this line may not be changed to use the test_bit() format. | |
622 | */ | |
623 | return tim[id / 8] & (1 << (id % 8)); | |
624 | } | |
625 | ||
948d887d | 626 | static unsigned long ieee80211_tids_for_ac(int ac) |
004c872e | 627 | { |
948d887d JB |
628 | /* If we ever support TIDs > 7, this obviously needs to be adjusted */ |
629 | switch (ac) { | |
630 | case IEEE80211_AC_VO: | |
631 | return BIT(6) | BIT(7); | |
632 | case IEEE80211_AC_VI: | |
633 | return BIT(4) | BIT(5); | |
634 | case IEEE80211_AC_BE: | |
635 | return BIT(0) | BIT(3); | |
636 | case IEEE80211_AC_BK: | |
637 | return BIT(1) | BIT(2); | |
638 | default: | |
639 | WARN_ON(1); | |
640 | return 0; | |
d0709a65 | 641 | } |
004c872e JB |
642 | } |
643 | ||
9b7a86f3 | 644 | static void __sta_info_recalc_tim(struct sta_info *sta, bool ignore_pending) |
004c872e | 645 | { |
c868cb35 | 646 | struct ieee80211_local *local = sta->local; |
d012a605 | 647 | struct ps_data *ps; |
948d887d JB |
648 | bool indicate_tim = false; |
649 | u8 ignore_for_tim = sta->sta.uapsd_queues; | |
650 | int ac; | |
a69bd8e6 | 651 | u16 id = sta->sta.aid; |
d012a605 MP |
652 | |
653 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP || | |
654 | sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { | |
655 | if (WARN_ON_ONCE(!sta->sdata->bss)) | |
656 | return; | |
004c872e | 657 | |
d012a605 | 658 | ps = &sta->sdata->bss->ps; |
3f52b7e3 MP |
659 | #ifdef CONFIG_MAC80211_MESH |
660 | } else if (ieee80211_vif_is_mesh(&sta->sdata->vif)) { | |
661 | ps = &sta->sdata->u.mesh.ps; | |
3f52b7e3 | 662 | #endif |
d012a605 | 663 | } else { |
c868cb35 | 664 | return; |
d012a605 | 665 | } |
3e122be0 | 666 | |
c868cb35 | 667 | /* No need to do anything if the driver does all */ |
30686bf7 | 668 | if (ieee80211_hw_check(&local->hw, AP_LINK_PS)) |
c868cb35 | 669 | return; |
004c872e | 670 | |
c868cb35 JB |
671 | if (sta->dead) |
672 | goto done; | |
3e122be0 | 673 | |
948d887d JB |
674 | /* |
675 | * If all ACs are delivery-enabled then we should build | |
676 | * the TIM bit for all ACs anyway; if only some are then | |
677 | * we ignore those and build the TIM bit using only the | |
678 | * non-enabled ones. | |
679 | */ | |
680 | if (ignore_for_tim == BIT(IEEE80211_NUM_ACS) - 1) | |
681 | ignore_for_tim = 0; | |
682 | ||
9b7a86f3 JB |
683 | if (ignore_pending) |
684 | ignore_for_tim = BIT(IEEE80211_NUM_ACS) - 1; | |
685 | ||
948d887d JB |
686 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { |
687 | unsigned long tids; | |
3e122be0 | 688 | |
948d887d JB |
689 | if (ignore_for_tim & BIT(ac)) |
690 | continue; | |
691 | ||
692 | indicate_tim |= !skb_queue_empty(&sta->tx_filtered[ac]) || | |
693 | !skb_queue_empty(&sta->ps_tx_buf[ac]); | |
694 | if (indicate_tim) | |
695 | break; | |
3e122be0 | 696 | |
948d887d JB |
697 | tids = ieee80211_tids_for_ac(ac); |
698 | ||
699 | indicate_tim |= | |
700 | sta->driver_buffered_tids & tids; | |
ba8c3d6f FF |
701 | indicate_tim |= |
702 | sta->txq_buffered_tids & tids; | |
d0709a65 | 703 | } |
004c872e | 704 | |
c868cb35 | 705 | done: |
65f704a5 | 706 | spin_lock_bh(&local->tim_lock); |
004c872e | 707 | |
3d5839b6 IP |
708 | if (indicate_tim == __bss_tim_get(ps->tim, id)) |
709 | goto out_unlock; | |
710 | ||
948d887d | 711 | if (indicate_tim) |
d012a605 | 712 | __bss_tim_set(ps->tim, id); |
c868cb35 | 713 | else |
d012a605 | 714 | __bss_tim_clear(ps->tim, id); |
004c872e | 715 | |
9b7a86f3 | 716 | if (local->ops->set_tim && !WARN_ON(sta->dead)) { |
c868cb35 | 717 | local->tim_in_locked_section = true; |
948d887d | 718 | drv_set_tim(local, &sta->sta, indicate_tim); |
c868cb35 JB |
719 | local->tim_in_locked_section = false; |
720 | } | |
3e122be0 | 721 | |
3d5839b6 | 722 | out_unlock: |
65f704a5 | 723 | spin_unlock_bh(&local->tim_lock); |
004c872e JB |
724 | } |
725 | ||
9b7a86f3 JB |
726 | void sta_info_recalc_tim(struct sta_info *sta) |
727 | { | |
728 | __sta_info_recalc_tim(sta, false); | |
729 | } | |
730 | ||
cd0b8d89 | 731 | static bool sta_info_buffer_expired(struct sta_info *sta, struct sk_buff *skb) |
f0706e82 | 732 | { |
e039fa4a | 733 | struct ieee80211_tx_info *info; |
f0706e82 JB |
734 | int timeout; |
735 | ||
736 | if (!skb) | |
cd0b8d89 | 737 | return false; |
f0706e82 | 738 | |
e039fa4a | 739 | info = IEEE80211_SKB_CB(skb); |
f0706e82 JB |
740 | |
741 | /* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */ | |
57c4d7b4 JB |
742 | timeout = (sta->listen_interval * |
743 | sta->sdata->vif.bss_conf.beacon_int * | |
744 | 32 / 15625) * HZ; | |
f0706e82 JB |
745 | if (timeout < STA_TX_BUFFER_EXPIRE) |
746 | timeout = STA_TX_BUFFER_EXPIRE; | |
e039fa4a | 747 | return time_after(jiffies, info->control.jiffies + timeout); |
f0706e82 JB |
748 | } |
749 | ||
750 | ||
948d887d JB |
751 | static bool sta_info_cleanup_expire_buffered_ac(struct ieee80211_local *local, |
752 | struct sta_info *sta, int ac) | |
f0706e82 JB |
753 | { |
754 | unsigned long flags; | |
755 | struct sk_buff *skb; | |
756 | ||
60750397 JB |
757 | /* |
758 | * First check for frames that should expire on the filtered | |
759 | * queue. Frames here were rejected by the driver and are on | |
760 | * a separate queue to avoid reordering with normal PS-buffered | |
761 | * frames. They also aren't accounted for right now in the | |
762 | * total_ps_buffered counter. | |
763 | */ | |
764 | for (;;) { | |
948d887d JB |
765 | spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags); |
766 | skb = skb_peek(&sta->tx_filtered[ac]); | |
60750397 | 767 | if (sta_info_buffer_expired(sta, skb)) |
948d887d | 768 | skb = __skb_dequeue(&sta->tx_filtered[ac]); |
60750397 JB |
769 | else |
770 | skb = NULL; | |
948d887d | 771 | spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags); |
60750397 JB |
772 | |
773 | /* | |
774 | * Frames are queued in order, so if this one | |
775 | * hasn't expired yet we can stop testing. If | |
776 | * we actually reached the end of the queue we | |
777 | * also need to stop, of course. | |
778 | */ | |
779 | if (!skb) | |
780 | break; | |
d4fa14cd | 781 | ieee80211_free_txskb(&local->hw, skb); |
60750397 JB |
782 | } |
783 | ||
784 | /* | |
785 | * Now also check the normal PS-buffered queue, this will | |
786 | * only find something if the filtered queue was emptied | |
787 | * since the filtered frames are all before the normal PS | |
788 | * buffered frames. | |
789 | */ | |
f0706e82 | 790 | for (;;) { |
948d887d JB |
791 | spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags); |
792 | skb = skb_peek(&sta->ps_tx_buf[ac]); | |
57c4d7b4 | 793 | if (sta_info_buffer_expired(sta, skb)) |
948d887d | 794 | skb = __skb_dequeue(&sta->ps_tx_buf[ac]); |
836341a7 | 795 | else |
f0706e82 | 796 | skb = NULL; |
948d887d | 797 | spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags); |
f0706e82 | 798 | |
60750397 JB |
799 | /* |
800 | * frames are queued in order, so if this one | |
801 | * hasn't expired yet (or we reached the end of | |
802 | * the queue) we can stop testing | |
803 | */ | |
836341a7 | 804 | if (!skb) |
f0706e82 | 805 | break; |
836341a7 | 806 | |
836341a7 | 807 | local->total_ps_buffered--; |
bdcbd8e0 JB |
808 | ps_dbg(sta->sdata, "Buffered frame expired (STA %pM)\n", |
809 | sta->sta.addr); | |
d4fa14cd | 810 | ieee80211_free_txskb(&local->hw, skb); |
f0706e82 | 811 | } |
3393a608 | 812 | |
60750397 JB |
813 | /* |
814 | * Finally, recalculate the TIM bit for this station -- it might | |
815 | * now be clear because the station was too slow to retrieve its | |
816 | * frames. | |
817 | */ | |
818 | sta_info_recalc_tim(sta); | |
819 | ||
820 | /* | |
821 | * Return whether there are any frames still buffered, this is | |
822 | * used to check whether the cleanup timer still needs to run, | |
823 | * if there are no frames we don't need to rearm the timer. | |
824 | */ | |
948d887d JB |
825 | return !(skb_queue_empty(&sta->ps_tx_buf[ac]) && |
826 | skb_queue_empty(&sta->tx_filtered[ac])); | |
827 | } | |
828 | ||
829 | static bool sta_info_cleanup_expire_buffered(struct ieee80211_local *local, | |
830 | struct sta_info *sta) | |
831 | { | |
832 | bool have_buffered = false; | |
833 | int ac; | |
834 | ||
3f52b7e3 MP |
835 | /* This is only necessary for stations on BSS/MBSS interfaces */ |
836 | if (!sta->sdata->bss && | |
837 | !ieee80211_vif_is_mesh(&sta->sdata->vif)) | |
948d887d JB |
838 | return false; |
839 | ||
840 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) | |
841 | have_buffered |= | |
842 | sta_info_cleanup_expire_buffered_ac(local, sta, ac); | |
843 | ||
844 | return have_buffered; | |
f0706e82 JB |
845 | } |
846 | ||
d778207b | 847 | static int __must_check __sta_info_destroy_part1(struct sta_info *sta) |
f0706e82 | 848 | { |
34e89507 JB |
849 | struct ieee80211_local *local; |
850 | struct ieee80211_sub_if_data *sdata; | |
6d10e46b | 851 | int ret; |
f0706e82 | 852 | |
34e89507 | 853 | might_sleep(); |
f0706e82 | 854 | |
34e89507 JB |
855 | if (!sta) |
856 | return -ENOENT; | |
5bb644a0 | 857 | |
34e89507 JB |
858 | local = sta->local; |
859 | sdata = sta->sdata; | |
f0706e82 | 860 | |
83d5cc01 JB |
861 | lockdep_assert_held(&local->sta_mtx); |
862 | ||
098a6070 JB |
863 | /* |
864 | * Before removing the station from the driver and | |
865 | * rate control, it might still start new aggregation | |
866 | * sessions -- block that to make sure the tear-down | |
867 | * will be sufficient. | |
868 | */ | |
c2c98fde | 869 | set_sta_flag(sta, WLAN_STA_BLOCK_BA); |
c82c4a80 | 870 | ieee80211_sta_tear_down_BA_sessions(sta, AGG_STOP_DESTROY_STA); |
098a6070 | 871 | |
34e89507 | 872 | ret = sta_info_hash_del(local, sta); |
b01711be | 873 | if (WARN_ON(ret)) |
34e89507 JB |
874 | return ret; |
875 | ||
a7a6bdd0 AN |
876 | /* |
877 | * for TDLS peers, make sure to return to the base channel before | |
878 | * removal. | |
879 | */ | |
880 | if (test_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL)) { | |
881 | drv_tdls_cancel_channel_switch(local, sdata, &sta->sta); | |
882 | clear_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL); | |
883 | } | |
884 | ||
794454ce | 885 | list_del_rcu(&sta->list); |
ef044763 | 886 | sta->removed = true; |
4d33960b | 887 | |
6a9d1b91 JB |
888 | drv_sta_pre_rcu_remove(local, sta->sdata, sta); |
889 | ||
a710c816 JB |
890 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN && |
891 | rcu_access_pointer(sdata->u.vlan.sta) == sta) | |
892 | RCU_INIT_POINTER(sdata->u.vlan.sta, NULL); | |
893 | ||
d778207b JB |
894 | return 0; |
895 | } | |
896 | ||
897 | static void __sta_info_destroy_part2(struct sta_info *sta) | |
898 | { | |
899 | struct ieee80211_local *local = sta->local; | |
900 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
6f7a8d26 | 901 | struct station_info sinfo = {}; |
d778207b JB |
902 | int ret; |
903 | ||
904 | /* | |
905 | * NOTE: This assumes at least synchronize_net() was done | |
906 | * after _part1 and before _part2! | |
907 | */ | |
908 | ||
909 | might_sleep(); | |
910 | lockdep_assert_held(&local->sta_mtx); | |
911 | ||
c8782078 | 912 | /* now keys can no longer be reached */ |
6d10e46b | 913 | ieee80211_free_sta_keys(local, sta); |
34e89507 | 914 | |
9b7a86f3 JB |
915 | /* disable TIM bit - last chance to tell driver */ |
916 | __sta_info_recalc_tim(sta, true); | |
917 | ||
34e89507 JB |
918 | sta->dead = true; |
919 | ||
34e89507 JB |
920 | local->num_sta--; |
921 | local->sta_generation++; | |
922 | ||
83d5cc01 | 923 | while (sta->sta_state > IEEE80211_STA_NONE) { |
f09603a2 JB |
924 | ret = sta_info_move_state(sta, sta->sta_state - 1); |
925 | if (ret) { | |
83d5cc01 JB |
926 | WARN_ON_ONCE(1); |
927 | break; | |
928 | } | |
929 | } | |
d9a7ddb0 | 930 | |
f09603a2 | 931 | if (sta->uploaded) { |
f09603a2 JB |
932 | ret = drv_sta_state(local, sdata, sta, IEEE80211_STA_NONE, |
933 | IEEE80211_STA_NOTEXIST); | |
934 | WARN_ON_ONCE(ret != 0); | |
935 | } | |
34e89507 | 936 | |
bdcbd8e0 JB |
937 | sta_dbg(sdata, "Removed STA %pM\n", sta->sta.addr); |
938 | ||
6f7a8d26 JB |
939 | sta_set_sinfo(sta, &sinfo); |
940 | cfg80211_del_sta_sinfo(sdata->dev, sta->sta.addr, &sinfo, GFP_KERNEL); | |
ec15e68b | 941 | |
34e89507 JB |
942 | rate_control_remove_sta_debugfs(sta); |
943 | ieee80211_sta_debugfs_remove(sta); | |
21f659bf | 944 | ieee80211_recalc_min_chandef(sdata); |
34e89507 | 945 | |
d34ba216 | 946 | cleanup_single_sta(sta); |
d778207b JB |
947 | } |
948 | ||
949 | int __must_check __sta_info_destroy(struct sta_info *sta) | |
950 | { | |
951 | int err = __sta_info_destroy_part1(sta); | |
952 | ||
953 | if (err) | |
954 | return err; | |
955 | ||
956 | synchronize_net(); | |
957 | ||
958 | __sta_info_destroy_part2(sta); | |
34e89507 JB |
959 | |
960 | return 0; | |
4d6141c3 JS |
961 | } |
962 | ||
34e89507 | 963 | int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, const u8 *addr) |
4d6141c3 | 964 | { |
34e89507 JB |
965 | struct sta_info *sta; |
966 | int ret; | |
4d6141c3 | 967 | |
34e89507 | 968 | mutex_lock(&sdata->local->sta_mtx); |
7852e361 | 969 | sta = sta_info_get(sdata, addr); |
34e89507 JB |
970 | ret = __sta_info_destroy(sta); |
971 | mutex_unlock(&sdata->local->sta_mtx); | |
4d6141c3 JS |
972 | |
973 | return ret; | |
974 | } | |
975 | ||
34e89507 JB |
976 | int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata, |
977 | const u8 *addr) | |
e9f207f0 | 978 | { |
34e89507 JB |
979 | struct sta_info *sta; |
980 | int ret; | |
e9f207f0 | 981 | |
34e89507 | 982 | mutex_lock(&sdata->local->sta_mtx); |
7852e361 | 983 | sta = sta_info_get_bss(sdata, addr); |
34e89507 JB |
984 | ret = __sta_info_destroy(sta); |
985 | mutex_unlock(&sdata->local->sta_mtx); | |
d0709a65 | 986 | |
34e89507 JB |
987 | return ret; |
988 | } | |
e9f207f0 | 989 | |
34e89507 JB |
990 | static void sta_info_cleanup(unsigned long data) |
991 | { | |
992 | struct ieee80211_local *local = (struct ieee80211_local *) data; | |
993 | struct sta_info *sta; | |
3393a608 | 994 | bool timer_needed = false; |
34e89507 JB |
995 | |
996 | rcu_read_lock(); | |
997 | list_for_each_entry_rcu(sta, &local->sta_list, list) | |
3393a608 JO |
998 | if (sta_info_cleanup_expire_buffered(local, sta)) |
999 | timer_needed = true; | |
34e89507 | 1000 | rcu_read_unlock(); |
e9f207f0 | 1001 | |
34e89507 JB |
1002 | if (local->quiescing) |
1003 | return; | |
d0709a65 | 1004 | |
3393a608 JO |
1005 | if (!timer_needed) |
1006 | return; | |
1007 | ||
26d59535 JB |
1008 | mod_timer(&local->sta_cleanup, |
1009 | round_jiffies(jiffies + STA_INFO_CLEANUP_INTERVAL)); | |
e9f207f0 | 1010 | } |
e9f207f0 | 1011 | |
7bedd0cf | 1012 | u32 sta_addr_hash(const void *key, u32 length, u32 seed) |
f0706e82 | 1013 | { |
7bedd0cf JB |
1014 | return jhash(key, ETH_ALEN, seed); |
1015 | } | |
1016 | ||
1017 | int sta_info_init(struct ieee80211_local *local) | |
1018 | { | |
1019 | int err; | |
1020 | ||
1021 | err = rhashtable_init(&local->sta_hash, &sta_rht_params); | |
1022 | if (err) | |
1023 | return err; | |
1024 | ||
4d33960b | 1025 | spin_lock_init(&local->tim_lock); |
34e89507 | 1026 | mutex_init(&local->sta_mtx); |
f0706e82 | 1027 | INIT_LIST_HEAD(&local->sta_list); |
f0706e82 | 1028 | |
b24b8a24 PE |
1029 | setup_timer(&local->sta_cleanup, sta_info_cleanup, |
1030 | (unsigned long)local); | |
7bedd0cf | 1031 | return 0; |
f0706e82 JB |
1032 | } |
1033 | ||
1034 | void sta_info_stop(struct ieee80211_local *local) | |
1035 | { | |
a56f992c | 1036 | del_timer_sync(&local->sta_cleanup); |
7bedd0cf | 1037 | rhashtable_destroy(&local->sta_hash); |
f0706e82 JB |
1038 | } |
1039 | ||
051007d9 | 1040 | |
e716251d | 1041 | int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans) |
f0706e82 | 1042 | { |
b998e8bb | 1043 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 1044 | struct sta_info *sta, *tmp; |
d778207b | 1045 | LIST_HEAD(free_list); |
44213b5e | 1046 | int ret = 0; |
f0706e82 | 1047 | |
d0709a65 | 1048 | might_sleep(); |
be8755e1 | 1049 | |
e716251d JB |
1050 | WARN_ON(vlans && sdata->vif.type != NL80211_IFTYPE_AP); |
1051 | WARN_ON(vlans && !sdata->bss); | |
1052 | ||
34e89507 | 1053 | mutex_lock(&local->sta_mtx); |
d0709a65 | 1054 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { |
e716251d JB |
1055 | if (sdata == sta->sdata || |
1056 | (vlans && sdata->bss == sta->sdata->bss)) { | |
d778207b JB |
1057 | if (!WARN_ON(__sta_info_destroy_part1(sta))) |
1058 | list_add(&sta->free_list, &free_list); | |
34316837 JB |
1059 | ret++; |
1060 | } | |
be8755e1 | 1061 | } |
d778207b JB |
1062 | |
1063 | if (!list_empty(&free_list)) { | |
1064 | synchronize_net(); | |
1065 | list_for_each_entry_safe(sta, tmp, &free_list, free_list) | |
1066 | __sta_info_destroy_part2(sta); | |
1067 | } | |
34e89507 | 1068 | mutex_unlock(&local->sta_mtx); |
44213b5e | 1069 | |
051007d9 JB |
1070 | return ret; |
1071 | } | |
1072 | ||
24723d1b JB |
1073 | void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, |
1074 | unsigned long exp_time) | |
1075 | { | |
1076 | struct ieee80211_local *local = sdata->local; | |
1077 | struct sta_info *sta, *tmp; | |
24723d1b | 1078 | |
34e89507 | 1079 | mutex_lock(&local->sta_mtx); |
e46a2cf9 MSS |
1080 | |
1081 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { | |
ec2b774e ML |
1082 | if (sdata != sta->sdata) |
1083 | continue; | |
1084 | ||
e5a9f8d0 | 1085 | if (time_after(jiffies, sta->rx_stats.last_rx + exp_time)) { |
eea57d42 MSS |
1086 | sta_dbg(sta->sdata, "expiring inactive STA %pM\n", |
1087 | sta->sta.addr); | |
3f52b7e3 MP |
1088 | |
1089 | if (ieee80211_vif_is_mesh(&sdata->vif) && | |
1090 | test_sta_flag(sta, WLAN_STA_PS_STA)) | |
1091 | atomic_dec(&sdata->u.mesh.ps.num_sta_ps); | |
1092 | ||
34e89507 | 1093 | WARN_ON(__sta_info_destroy(sta)); |
24723d1b | 1094 | } |
e46a2cf9 MSS |
1095 | } |
1096 | ||
34e89507 | 1097 | mutex_unlock(&local->sta_mtx); |
24723d1b | 1098 | } |
17741cdc | 1099 | |
686b9cb9 | 1100 | struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw, |
7bedd0cf JB |
1101 | const u8 *addr, |
1102 | const u8 *localaddr) | |
17741cdc | 1103 | { |
7bedd0cf JB |
1104 | struct ieee80211_local *local = hw_to_local(hw); |
1105 | struct sta_info *sta; | |
1106 | struct rhash_head *tmp; | |
1107 | const struct bucket_table *tbl; | |
1108 | ||
1109 | tbl = rht_dereference_rcu(local->sta_hash.tbl, &local->sta_hash); | |
17741cdc | 1110 | |
686b9cb9 BG |
1111 | /* |
1112 | * Just return a random station if localaddr is NULL | |
1113 | * ... first in list. | |
1114 | */ | |
7bedd0cf | 1115 | for_each_sta_info(local, tbl, addr, sta, tmp) { |
686b9cb9 | 1116 | if (localaddr && |
b203ca39 | 1117 | !ether_addr_equal(sta->sdata->vif.addr, localaddr)) |
686b9cb9 | 1118 | continue; |
f7c65594 JB |
1119 | if (!sta->uploaded) |
1120 | return NULL; | |
abe60632 | 1121 | return &sta->sta; |
f7c65594 JB |
1122 | } |
1123 | ||
abe60632 | 1124 | return NULL; |
17741cdc | 1125 | } |
686b9cb9 | 1126 | EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_ifaddr); |
5ed176e1 JB |
1127 | |
1128 | struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif, | |
1129 | const u8 *addr) | |
1130 | { | |
f7c65594 | 1131 | struct sta_info *sta; |
5ed176e1 JB |
1132 | |
1133 | if (!vif) | |
1134 | return NULL; | |
1135 | ||
f7c65594 JB |
1136 | sta = sta_info_get_bss(vif_to_sdata(vif), addr); |
1137 | if (!sta) | |
1138 | return NULL; | |
1139 | ||
1140 | if (!sta->uploaded) | |
1141 | return NULL; | |
5ed176e1 | 1142 | |
f7c65594 | 1143 | return &sta->sta; |
5ed176e1 | 1144 | } |
17741cdc | 1145 | EXPORT_SYMBOL(ieee80211_find_sta); |
af818581 | 1146 | |
e3685e03 JB |
1147 | /* powersave support code */ |
1148 | void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta) | |
50a9432d | 1149 | { |
608383bf | 1150 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
e3685e03 JB |
1151 | struct ieee80211_local *local = sdata->local; |
1152 | struct sk_buff_head pending; | |
ba8c3d6f | 1153 | int filtered = 0, buffered = 0, ac, i; |
e3685e03 | 1154 | unsigned long flags; |
d012a605 MP |
1155 | struct ps_data *ps; |
1156 | ||
3918edb0 FF |
1157 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) |
1158 | sdata = container_of(sdata->bss, struct ieee80211_sub_if_data, | |
1159 | u.ap); | |
1160 | ||
1161 | if (sdata->vif.type == NL80211_IFTYPE_AP) | |
d012a605 | 1162 | ps = &sdata->bss->ps; |
3f52b7e3 MP |
1163 | else if (ieee80211_vif_is_mesh(&sdata->vif)) |
1164 | ps = &sdata->u.mesh.ps; | |
d012a605 MP |
1165 | else |
1166 | return; | |
50a9432d | 1167 | |
c2c98fde | 1168 | clear_sta_flag(sta, WLAN_STA_SP); |
47086fc5 | 1169 | |
5a306f58 | 1170 | BUILD_BUG_ON(BITS_TO_LONGS(IEEE80211_NUM_TIDS) > 1); |
948d887d | 1171 | sta->driver_buffered_tids = 0; |
ba8c3d6f | 1172 | sta->txq_buffered_tids = 0; |
af818581 | 1173 | |
30686bf7 | 1174 | if (!ieee80211_hw_check(&local->hw, AP_LINK_PS)) |
d057e5a3 | 1175 | drv_sta_notify(local, sdata, STA_NOTIFY_AWAKE, &sta->sta); |
af818581 | 1176 | |
ba8c3d6f FF |
1177 | if (sta->sta.txq[0]) { |
1178 | for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) { | |
1179 | struct txq_info *txqi = to_txq_info(sta->sta.txq[i]); | |
1180 | ||
1181 | if (!skb_queue_len(&txqi->queue)) | |
1182 | continue; | |
1183 | ||
1184 | drv_wake_tx_queue(local, txqi); | |
1185 | } | |
1186 | } | |
1187 | ||
948d887d | 1188 | skb_queue_head_init(&pending); |
af818581 | 1189 | |
1d147bfa EG |
1190 | /* sync with ieee80211_tx_h_unicast_ps_buf */ |
1191 | spin_lock(&sta->ps_lock); | |
af818581 | 1192 | /* Send all buffered frames to the station */ |
948d887d JB |
1193 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { |
1194 | int count = skb_queue_len(&pending), tmp; | |
1195 | ||
987c285c | 1196 | spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags); |
948d887d | 1197 | skb_queue_splice_tail_init(&sta->tx_filtered[ac], &pending); |
987c285c | 1198 | spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags); |
948d887d JB |
1199 | tmp = skb_queue_len(&pending); |
1200 | filtered += tmp - count; | |
1201 | count = tmp; | |
1202 | ||
987c285c | 1203 | spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags); |
948d887d | 1204 | skb_queue_splice_tail_init(&sta->ps_tx_buf[ac], &pending); |
987c285c | 1205 | spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags); |
948d887d JB |
1206 | tmp = skb_queue_len(&pending); |
1207 | buffered += tmp - count; | |
1208 | } | |
1209 | ||
e3685e03 | 1210 | ieee80211_add_pending_skbs(local, &pending); |
5ac2e350 JB |
1211 | |
1212 | /* now we're no longer in the deliver code */ | |
1213 | clear_sta_flag(sta, WLAN_STA_PS_DELIVER); | |
1214 | ||
1215 | /* The station might have polled and then woken up before we responded, | |
1216 | * so clear these flags now to avoid them sticking around. | |
1217 | */ | |
1218 | clear_sta_flag(sta, WLAN_STA_PSPOLL); | |
1219 | clear_sta_flag(sta, WLAN_STA_UAPSD); | |
1d147bfa | 1220 | spin_unlock(&sta->ps_lock); |
948d887d | 1221 | |
e3685e03 JB |
1222 | atomic_dec(&ps->num_sta_ps); |
1223 | ||
687da132 | 1224 | /* This station just woke up and isn't aware of our SMPS state */ |
062f1d6d CYY |
1225 | if (!ieee80211_vif_is_mesh(&sdata->vif) && |
1226 | !ieee80211_smps_is_restrictive(sta->known_smps_mode, | |
687da132 EG |
1227 | sdata->smps_mode) && |
1228 | sta->known_smps_mode != sdata->bss->req_smps && | |
1229 | sta_info_tx_streams(sta) != 1) { | |
1230 | ht_dbg(sdata, | |
1231 | "%pM just woke up and MIMO capable - update SMPS\n", | |
1232 | sta->sta.addr); | |
1233 | ieee80211_send_smps_action(sdata, sdata->bss->req_smps, | |
1234 | sta->sta.addr, | |
1235 | sdata->vif.bss_conf.bssid); | |
1236 | } | |
1237 | ||
af818581 JB |
1238 | local->total_ps_buffered -= buffered; |
1239 | ||
c868cb35 JB |
1240 | sta_info_recalc_tim(sta); |
1241 | ||
bdcbd8e0 JB |
1242 | ps_dbg(sdata, |
1243 | "STA %pM aid %d sending %d filtered/%d PS frames since STA not sleeping anymore\n", | |
1244 | sta->sta.addr, sta->sta.aid, filtered, buffered); | |
17c18bf8 JB |
1245 | |
1246 | ieee80211_check_fast_xmit(sta); | |
af818581 JB |
1247 | } |
1248 | ||
0ead2510 | 1249 | static void ieee80211_send_null_response(struct sta_info *sta, int tid, |
b77cf4f8 | 1250 | enum ieee80211_frame_release_type reason, |
0ead2510 | 1251 | bool call_driver, bool more_data) |
af818581 | 1252 | { |
0ead2510 | 1253 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
af818581 | 1254 | struct ieee80211_local *local = sdata->local; |
ce662b44 | 1255 | struct ieee80211_qos_hdr *nullfunc; |
af818581 | 1256 | struct sk_buff *skb; |
ce662b44 JB |
1257 | int size = sizeof(*nullfunc); |
1258 | __le16 fc; | |
a74a8c84 | 1259 | bool qos = sta->sta.wme; |
ce662b44 | 1260 | struct ieee80211_tx_info *info; |
55de908a | 1261 | struct ieee80211_chanctx_conf *chanctx_conf; |
af818581 | 1262 | |
ce662b44 JB |
1263 | if (qos) { |
1264 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | | |
1265 | IEEE80211_STYPE_QOS_NULLFUNC | | |
1266 | IEEE80211_FCTL_FROMDS); | |
1267 | } else { | |
1268 | size -= 2; | |
1269 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | | |
1270 | IEEE80211_STYPE_NULLFUNC | | |
1271 | IEEE80211_FCTL_FROMDS); | |
af818581 | 1272 | } |
af818581 | 1273 | |
ce662b44 JB |
1274 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + size); |
1275 | if (!skb) | |
1276 | return; | |
1277 | ||
1278 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
1279 | ||
1280 | nullfunc = (void *) skb_put(skb, size); | |
1281 | nullfunc->frame_control = fc; | |
1282 | nullfunc->duration_id = 0; | |
1283 | memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN); | |
1284 | memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); | |
1285 | memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN); | |
864a6040 | 1286 | nullfunc->seq_ctrl = 0; |
ce662b44 | 1287 | |
59b66255 JB |
1288 | skb->priority = tid; |
1289 | skb_set_queue_mapping(skb, ieee802_1d_to_ac[tid]); | |
ce662b44 | 1290 | if (qos) { |
ce662b44 JB |
1291 | nullfunc->qos_ctrl = cpu_to_le16(tid); |
1292 | ||
0ead2510 | 1293 | if (reason == IEEE80211_FRAME_RELEASE_UAPSD) { |
ce662b44 JB |
1294 | nullfunc->qos_ctrl |= |
1295 | cpu_to_le16(IEEE80211_QOS_CTL_EOSP); | |
0ead2510 EG |
1296 | if (more_data) |
1297 | nullfunc->frame_control |= | |
1298 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
1299 | } | |
ce662b44 JB |
1300 | } |
1301 | ||
1302 | info = IEEE80211_SKB_CB(skb); | |
1303 | ||
1304 | /* | |
1305 | * Tell TX path to send this frame even though the | |
1306 | * STA may still remain is PS mode after this frame | |
deeaee19 JB |
1307 | * exchange. Also set EOSP to indicate this packet |
1308 | * ends the poll/service period. | |
ce662b44 | 1309 | */ |
02f2f1a9 | 1310 | info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER | |
deeaee19 JB |
1311 | IEEE80211_TX_STATUS_EOSP | |
1312 | IEEE80211_TX_CTL_REQ_TX_STATUS; | |
ce662b44 | 1313 | |
6b127c71 SM |
1314 | info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE; |
1315 | ||
b77cf4f8 JB |
1316 | if (call_driver) |
1317 | drv_allow_buffered_frames(local, sta, BIT(tid), 1, | |
1318 | reason, false); | |
40b96408 | 1319 | |
89afe614 JB |
1320 | skb->dev = sdata->dev; |
1321 | ||
55de908a JB |
1322 | rcu_read_lock(); |
1323 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
1324 | if (WARN_ON(!chanctx_conf)) { | |
1325 | rcu_read_unlock(); | |
1326 | kfree_skb(skb); | |
1327 | return; | |
1328 | } | |
1329 | ||
73c4e195 | 1330 | info->band = chanctx_conf->def.chan->band; |
7c10770f | 1331 | ieee80211_xmit(sdata, sta, skb); |
55de908a | 1332 | rcu_read_unlock(); |
ce662b44 JB |
1333 | } |
1334 | ||
0a1cb809 JB |
1335 | static int find_highest_prio_tid(unsigned long tids) |
1336 | { | |
1337 | /* lower 3 TIDs aren't ordered perfectly */ | |
1338 | if (tids & 0xF8) | |
1339 | return fls(tids) - 1; | |
1340 | /* TID 0 is BE just like TID 3 */ | |
1341 | if (tids & BIT(0)) | |
1342 | return 0; | |
1343 | return fls(tids) - 1; | |
1344 | } | |
1345 | ||
0ead2510 EG |
1346 | /* Indicates if the MORE_DATA bit should be set in the last |
1347 | * frame obtained by ieee80211_sta_ps_get_frames. | |
1348 | * Note that driver_release_tids is relevant only if | |
1349 | * reason = IEEE80211_FRAME_RELEASE_PSPOLL | |
1350 | */ | |
1351 | static bool | |
1352 | ieee80211_sta_ps_more_data(struct sta_info *sta, u8 ignored_acs, | |
1353 | enum ieee80211_frame_release_type reason, | |
1354 | unsigned long driver_release_tids) | |
1355 | { | |
1356 | int ac; | |
1357 | ||
1358 | /* If the driver has data on more than one TID then | |
1359 | * certainly there's more data if we release just a | |
1360 | * single frame now (from a single TID). This will | |
1361 | * only happen for PS-Poll. | |
1362 | */ | |
1363 | if (reason == IEEE80211_FRAME_RELEASE_PSPOLL && | |
1364 | hweight16(driver_release_tids) > 1) | |
1365 | return true; | |
1366 | ||
1367 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { | |
1368 | if (ignored_acs & BIT(ac)) | |
1369 | continue; | |
1370 | ||
1371 | if (!skb_queue_empty(&sta->tx_filtered[ac]) || | |
1372 | !skb_queue_empty(&sta->ps_tx_buf[ac])) | |
1373 | return true; | |
1374 | } | |
1375 | ||
1376 | return false; | |
1377 | } | |
1378 | ||
47086fc5 | 1379 | static void |
0ead2510 EG |
1380 | ieee80211_sta_ps_get_frames(struct sta_info *sta, int n_frames, u8 ignored_acs, |
1381 | enum ieee80211_frame_release_type reason, | |
1382 | struct sk_buff_head *frames, | |
1383 | unsigned long *driver_release_tids) | |
af818581 JB |
1384 | { |
1385 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
1386 | struct ieee80211_local *local = sdata->local; | |
948d887d | 1387 | int ac; |
948d887d | 1388 | |
f9f760b4 | 1389 | /* Get response frame(s) and more data bit for the last one. */ |
948d887d | 1390 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { |
4049e09a JB |
1391 | unsigned long tids; |
1392 | ||
47086fc5 | 1393 | if (ignored_acs & BIT(ac)) |
948d887d JB |
1394 | continue; |
1395 | ||
4049e09a JB |
1396 | tids = ieee80211_tids_for_ac(ac); |
1397 | ||
f9f760b4 JB |
1398 | /* if we already have frames from software, then we can't also |
1399 | * release from hardware queues | |
1400 | */ | |
0ead2510 EG |
1401 | if (skb_queue_empty(frames)) { |
1402 | *driver_release_tids |= | |
1403 | sta->driver_buffered_tids & tids; | |
1404 | *driver_release_tids |= sta->txq_buffered_tids & tids; | |
ba8c3d6f | 1405 | } |
948d887d | 1406 | |
0ead2510 | 1407 | if (!*driver_release_tids) { |
f9f760b4 JB |
1408 | struct sk_buff *skb; |
1409 | ||
1410 | while (n_frames > 0) { | |
1411 | skb = skb_dequeue(&sta->tx_filtered[ac]); | |
1412 | if (!skb) { | |
1413 | skb = skb_dequeue( | |
1414 | &sta->ps_tx_buf[ac]); | |
1415 | if (skb) | |
1416 | local->total_ps_buffered--; | |
1417 | } | |
1418 | if (!skb) | |
1419 | break; | |
1420 | n_frames--; | |
0ead2510 | 1421 | __skb_queue_tail(frames, skb); |
f9f760b4 | 1422 | } |
4049e09a | 1423 | } |
948d887d | 1424 | |
0ead2510 EG |
1425 | /* If we have more frames buffered on this AC, then abort the |
1426 | * loop since we can't send more data from other ACs before | |
1427 | * the buffered frames from this. | |
f9f760b4 | 1428 | */ |
948d887d | 1429 | if (!skb_queue_empty(&sta->tx_filtered[ac]) || |
0ead2510 | 1430 | !skb_queue_empty(&sta->ps_tx_buf[ac])) |
948d887d | 1431 | break; |
af818581 | 1432 | } |
0ead2510 EG |
1433 | } |
1434 | ||
1435 | static void | |
1436 | ieee80211_sta_ps_deliver_response(struct sta_info *sta, | |
1437 | int n_frames, u8 ignored_acs, | |
1438 | enum ieee80211_frame_release_type reason) | |
1439 | { | |
1440 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
1441 | struct ieee80211_local *local = sdata->local; | |
1442 | unsigned long driver_release_tids = 0; | |
1443 | struct sk_buff_head frames; | |
1444 | bool more_data; | |
1445 | ||
1446 | /* Service or PS-Poll period starts */ | |
1447 | set_sta_flag(sta, WLAN_STA_SP); | |
1448 | ||
1449 | __skb_queue_head_init(&frames); | |
1450 | ||
1451 | ieee80211_sta_ps_get_frames(sta, n_frames, ignored_acs, reason, | |
1452 | &frames, &driver_release_tids); | |
1453 | ||
1454 | more_data = ieee80211_sta_ps_more_data(sta, ignored_acs, reason, driver_release_tids); | |
1455 | ||
1a57081a | 1456 | if (driver_release_tids && reason == IEEE80211_FRAME_RELEASE_PSPOLL) |
0ead2510 EG |
1457 | driver_release_tids = |
1458 | BIT(find_highest_prio_tid(driver_release_tids)); | |
af818581 | 1459 | |
f9f760b4 | 1460 | if (skb_queue_empty(&frames) && !driver_release_tids) { |
ce662b44 | 1461 | int tid; |
af818581 JB |
1462 | |
1463 | /* | |
ce662b44 JB |
1464 | * For PS-Poll, this can only happen due to a race condition |
1465 | * when we set the TIM bit and the station notices it, but | |
1466 | * before it can poll for the frame we expire it. | |
1467 | * | |
1468 | * For uAPSD, this is said in the standard (11.2.1.5 h): | |
1469 | * At each unscheduled SP for a non-AP STA, the AP shall | |
1470 | * attempt to transmit at least one MSDU or MMPDU, but no | |
1471 | * more than the value specified in the Max SP Length field | |
1472 | * in the QoS Capability element from delivery-enabled ACs, | |
1473 | * that are destined for the non-AP STA. | |
1474 | * | |
1475 | * Since we have no other MSDU/MMPDU, transmit a QoS null frame. | |
af818581 | 1476 | */ |
af818581 | 1477 | |
ce662b44 JB |
1478 | /* This will evaluate to 1, 3, 5 or 7. */ |
1479 | tid = 7 - ((ffs(~ignored_acs) - 1) << 1); | |
af818581 | 1480 | |
0ead2510 | 1481 | ieee80211_send_null_response(sta, tid, reason, true, false); |
f9f760b4 | 1482 | } else if (!driver_release_tids) { |
47086fc5 JB |
1483 | struct sk_buff_head pending; |
1484 | struct sk_buff *skb; | |
40b96408 JB |
1485 | int num = 0; |
1486 | u16 tids = 0; | |
b77cf4f8 | 1487 | bool need_null = false; |
af818581 | 1488 | |
47086fc5 | 1489 | skb_queue_head_init(&pending); |
af818581 | 1490 | |
47086fc5 JB |
1491 | while ((skb = __skb_dequeue(&frames))) { |
1492 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1493 | struct ieee80211_hdr *hdr = (void *) skb->data; | |
40b96408 JB |
1494 | u8 *qoshdr = NULL; |
1495 | ||
1496 | num++; | |
af818581 | 1497 | |
47086fc5 JB |
1498 | /* |
1499 | * Tell TX path to send this frame even though the | |
1500 | * STA may still remain is PS mode after this frame | |
1501 | * exchange. | |
1502 | */ | |
6b127c71 SM |
1503 | info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER; |
1504 | info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE; | |
47086fc5 JB |
1505 | |
1506 | /* | |
1507 | * Use MoreData flag to indicate whether there are | |
1508 | * more buffered frames for this STA | |
1509 | */ | |
24b9c373 | 1510 | if (more_data || !skb_queue_empty(&frames)) |
47086fc5 JB |
1511 | hdr->frame_control |= |
1512 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
24b9c373 JD |
1513 | else |
1514 | hdr->frame_control &= | |
1515 | cpu_to_le16(~IEEE80211_FCTL_MOREDATA); | |
47086fc5 | 1516 | |
40b96408 JB |
1517 | if (ieee80211_is_data_qos(hdr->frame_control) || |
1518 | ieee80211_is_qos_nullfunc(hdr->frame_control)) | |
1519 | qoshdr = ieee80211_get_qos_ctl(hdr); | |
1520 | ||
b77cf4f8 | 1521 | tids |= BIT(skb->priority); |
52a3f20c | 1522 | |
b77cf4f8 JB |
1523 | __skb_queue_tail(&pending, skb); |
1524 | ||
1525 | /* end service period after last frame or add one */ | |
1526 | if (!skb_queue_empty(&frames)) | |
1527 | continue; | |
1528 | ||
1529 | if (reason != IEEE80211_FRAME_RELEASE_UAPSD) { | |
1530 | /* for PS-Poll, there's only one frame */ | |
52a3f20c MP |
1531 | info->flags |= IEEE80211_TX_STATUS_EOSP | |
1532 | IEEE80211_TX_CTL_REQ_TX_STATUS; | |
b77cf4f8 | 1533 | break; |
52a3f20c | 1534 | } |
deeaee19 | 1535 | |
b77cf4f8 JB |
1536 | /* For uAPSD, things are a bit more complicated. If the |
1537 | * last frame has a QoS header (i.e. is a QoS-data or | |
1538 | * QoS-nulldata frame) then just set the EOSP bit there | |
1539 | * and be done. | |
1540 | * If the frame doesn't have a QoS header (which means | |
1541 | * it should be a bufferable MMPDU) then we can't set | |
1542 | * the EOSP bit in the QoS header; add a QoS-nulldata | |
1543 | * frame to the list to send it after the MMPDU. | |
1544 | * | |
1545 | * Note that this code is only in the mac80211-release | |
1546 | * code path, we assume that the driver will not buffer | |
1547 | * anything but QoS-data frames, or if it does, will | |
1548 | * create the QoS-nulldata frame by itself if needed. | |
1549 | * | |
1550 | * Cf. 802.11-2012 10.2.1.10 (c). | |
1551 | */ | |
1552 | if (qoshdr) { | |
1553 | *qoshdr |= IEEE80211_QOS_CTL_EOSP; | |
40b96408 | 1554 | |
b77cf4f8 JB |
1555 | info->flags |= IEEE80211_TX_STATUS_EOSP | |
1556 | IEEE80211_TX_CTL_REQ_TX_STATUS; | |
1557 | } else { | |
1558 | /* The standard isn't completely clear on this | |
1559 | * as it says the more-data bit should be set | |
1560 | * if there are more BUs. The QoS-Null frame | |
1561 | * we're about to send isn't buffered yet, we | |
1562 | * only create it below, but let's pretend it | |
1563 | * was buffered just in case some clients only | |
1564 | * expect more-data=0 when eosp=1. | |
1565 | */ | |
1566 | hdr->frame_control |= | |
1567 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
1568 | need_null = true; | |
1569 | num++; | |
1570 | } | |
1571 | break; | |
47086fc5 | 1572 | } |
af818581 | 1573 | |
40b96408 JB |
1574 | drv_allow_buffered_frames(local, sta, tids, num, |
1575 | reason, more_data); | |
1576 | ||
47086fc5 | 1577 | ieee80211_add_pending_skbs(local, &pending); |
af818581 | 1578 | |
b77cf4f8 JB |
1579 | if (need_null) |
1580 | ieee80211_send_null_response( | |
0ead2510 EG |
1581 | sta, find_highest_prio_tid(tids), |
1582 | reason, false, false); | |
b77cf4f8 | 1583 | |
c868cb35 | 1584 | sta_info_recalc_tim(sta); |
af818581 | 1585 | } else { |
ba8c3d6f FF |
1586 | unsigned long tids = sta->txq_buffered_tids & driver_release_tids; |
1587 | int tid; | |
1588 | ||
af818581 | 1589 | /* |
4049e09a JB |
1590 | * We need to release a frame that is buffered somewhere in the |
1591 | * driver ... it'll have to handle that. | |
f9f760b4 JB |
1592 | * Note that the driver also has to check the number of frames |
1593 | * on the TIDs we're releasing from - if there are more than | |
1594 | * n_frames it has to set the more-data bit (if we didn't ask | |
1595 | * it to set it anyway due to other buffered frames); if there | |
1596 | * are fewer than n_frames it has to make sure to adjust that | |
1597 | * to allow the service period to end properly. | |
4049e09a JB |
1598 | */ |
1599 | drv_release_buffered_frames(local, sta, driver_release_tids, | |
47086fc5 | 1600 | n_frames, reason, more_data); |
4049e09a JB |
1601 | |
1602 | /* | |
1603 | * Note that we don't recalculate the TIM bit here as it would | |
1604 | * most likely have no effect at all unless the driver told us | |
f9f760b4 | 1605 | * that the TID(s) became empty before returning here from the |
4049e09a | 1606 | * release function. |
f9f760b4 | 1607 | * Either way, however, when the driver tells us that the TID(s) |
ba8c3d6f FF |
1608 | * became empty or we find that a txq became empty, we'll do the |
1609 | * TIM recalculation. | |
af818581 | 1610 | */ |
ba8c3d6f FF |
1611 | |
1612 | if (!sta->sta.txq[0]) | |
1613 | return; | |
1614 | ||
1615 | for (tid = 0; tid < ARRAY_SIZE(sta->sta.txq); tid++) { | |
1616 | struct txq_info *txqi = to_txq_info(sta->sta.txq[tid]); | |
1617 | ||
1618 | if (!(tids & BIT(tid)) || skb_queue_len(&txqi->queue)) | |
1619 | continue; | |
1620 | ||
1621 | sta_info_recalc_tim(sta); | |
1622 | break; | |
1623 | } | |
af818581 JB |
1624 | } |
1625 | } | |
1626 | ||
47086fc5 JB |
1627 | void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta) |
1628 | { | |
1629 | u8 ignore_for_response = sta->sta.uapsd_queues; | |
1630 | ||
1631 | /* | |
1632 | * If all ACs are delivery-enabled then we should reply | |
1633 | * from any of them, if only some are enabled we reply | |
1634 | * only from the non-enabled ones. | |
1635 | */ | |
1636 | if (ignore_for_response == BIT(IEEE80211_NUM_ACS) - 1) | |
1637 | ignore_for_response = 0; | |
1638 | ||
1639 | ieee80211_sta_ps_deliver_response(sta, 1, ignore_for_response, | |
1640 | IEEE80211_FRAME_RELEASE_PSPOLL); | |
1641 | } | |
1642 | ||
1643 | void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta) | |
1644 | { | |
1645 | int n_frames = sta->sta.max_sp; | |
1646 | u8 delivery_enabled = sta->sta.uapsd_queues; | |
1647 | ||
1648 | /* | |
1649 | * If we ever grow support for TSPEC this might happen if | |
1650 | * the TSPEC update from hostapd comes in between a trigger | |
1651 | * frame setting WLAN_STA_UAPSD in the RX path and this | |
1652 | * actually getting called. | |
1653 | */ | |
1654 | if (!delivery_enabled) | |
1655 | return; | |
1656 | ||
47086fc5 JB |
1657 | switch (sta->sta.max_sp) { |
1658 | case 1: | |
1659 | n_frames = 2; | |
1660 | break; | |
1661 | case 2: | |
1662 | n_frames = 4; | |
1663 | break; | |
1664 | case 3: | |
1665 | n_frames = 6; | |
1666 | break; | |
1667 | case 0: | |
1668 | /* XXX: what is a good value? */ | |
13a8098a | 1669 | n_frames = 128; |
47086fc5 JB |
1670 | break; |
1671 | } | |
1672 | ||
1673 | ieee80211_sta_ps_deliver_response(sta, n_frames, ~delivery_enabled, | |
1674 | IEEE80211_FRAME_RELEASE_UAPSD); | |
1675 | } | |
1676 | ||
af818581 JB |
1677 | void ieee80211_sta_block_awake(struct ieee80211_hw *hw, |
1678 | struct ieee80211_sta *pubsta, bool block) | |
1679 | { | |
1680 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
1681 | ||
b5878a2d JB |
1682 | trace_api_sta_block_awake(sta->local, pubsta, block); |
1683 | ||
5ac2e350 | 1684 | if (block) { |
c2c98fde | 1685 | set_sta_flag(sta, WLAN_STA_PS_DRIVER); |
17c18bf8 | 1686 | ieee80211_clear_fast_xmit(sta); |
5ac2e350 JB |
1687 | return; |
1688 | } | |
1689 | ||
1690 | if (!test_sta_flag(sta, WLAN_STA_PS_DRIVER)) | |
1691 | return; | |
1692 | ||
1693 | if (!test_sta_flag(sta, WLAN_STA_PS_STA)) { | |
1694 | set_sta_flag(sta, WLAN_STA_PS_DELIVER); | |
1695 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); | |
1696 | ieee80211_queue_work(hw, &sta->drv_deliver_wk); | |
1697 | } else if (test_sta_flag(sta, WLAN_STA_PSPOLL) || | |
1698 | test_sta_flag(sta, WLAN_STA_UAPSD)) { | |
1699 | /* must be asleep in this case */ | |
1700 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); | |
1701 | ieee80211_queue_work(hw, &sta->drv_deliver_wk); | |
1702 | } else { | |
1703 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); | |
17c18bf8 | 1704 | ieee80211_check_fast_xmit(sta); |
5ac2e350 | 1705 | } |
af818581 JB |
1706 | } |
1707 | EXPORT_SYMBOL(ieee80211_sta_block_awake); | |
dcf55fb5 | 1708 | |
e943789e | 1709 | void ieee80211_sta_eosp(struct ieee80211_sta *pubsta) |
37fbd908 JB |
1710 | { |
1711 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
1712 | struct ieee80211_local *local = sta->local; | |
37fbd908 JB |
1713 | |
1714 | trace_api_eosp(local, pubsta); | |
1715 | ||
e943789e | 1716 | clear_sta_flag(sta, WLAN_STA_SP); |
37fbd908 | 1717 | } |
e943789e | 1718 | EXPORT_SYMBOL(ieee80211_sta_eosp); |
37fbd908 | 1719 | |
0ead2510 EG |
1720 | void ieee80211_send_eosp_nullfunc(struct ieee80211_sta *pubsta, int tid) |
1721 | { | |
1722 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
1723 | enum ieee80211_frame_release_type reason; | |
1724 | bool more_data; | |
1725 | ||
1726 | trace_api_send_eosp_nullfunc(sta->local, pubsta, tid); | |
1727 | ||
1728 | reason = IEEE80211_FRAME_RELEASE_UAPSD; | |
1729 | more_data = ieee80211_sta_ps_more_data(sta, ~sta->sta.uapsd_queues, | |
1730 | reason, 0); | |
1731 | ||
1732 | ieee80211_send_null_response(sta, tid, reason, false, more_data); | |
1733 | } | |
1734 | EXPORT_SYMBOL(ieee80211_send_eosp_nullfunc); | |
1735 | ||
042ec453 JB |
1736 | void ieee80211_sta_set_buffered(struct ieee80211_sta *pubsta, |
1737 | u8 tid, bool buffered) | |
dcf55fb5 FF |
1738 | { |
1739 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
1740 | ||
5a306f58 | 1741 | if (WARN_ON(tid >= IEEE80211_NUM_TIDS)) |
042ec453 JB |
1742 | return; |
1743 | ||
1b000789 JB |
1744 | trace_api_sta_set_buffered(sta->local, pubsta, tid, buffered); |
1745 | ||
948d887d JB |
1746 | if (buffered) |
1747 | set_bit(tid, &sta->driver_buffered_tids); | |
1748 | else | |
1749 | clear_bit(tid, &sta->driver_buffered_tids); | |
1750 | ||
c868cb35 | 1751 | sta_info_recalc_tim(sta); |
dcf55fb5 | 1752 | } |
042ec453 | 1753 | EXPORT_SYMBOL(ieee80211_sta_set_buffered); |
d9a7ddb0 | 1754 | |
83d5cc01 JB |
1755 | int sta_info_move_state(struct sta_info *sta, |
1756 | enum ieee80211_sta_state new_state) | |
d9a7ddb0 | 1757 | { |
8bf11d8d | 1758 | might_sleep(); |
d9a7ddb0 JB |
1759 | |
1760 | if (sta->sta_state == new_state) | |
1761 | return 0; | |
1762 | ||
f09603a2 JB |
1763 | /* check allowed transitions first */ |
1764 | ||
1765 | switch (new_state) { | |
1766 | case IEEE80211_STA_NONE: | |
1767 | if (sta->sta_state != IEEE80211_STA_AUTH) | |
1768 | return -EINVAL; | |
1769 | break; | |
1770 | case IEEE80211_STA_AUTH: | |
1771 | if (sta->sta_state != IEEE80211_STA_NONE && | |
1772 | sta->sta_state != IEEE80211_STA_ASSOC) | |
1773 | return -EINVAL; | |
1774 | break; | |
1775 | case IEEE80211_STA_ASSOC: | |
1776 | if (sta->sta_state != IEEE80211_STA_AUTH && | |
1777 | sta->sta_state != IEEE80211_STA_AUTHORIZED) | |
1778 | return -EINVAL; | |
1779 | break; | |
1780 | case IEEE80211_STA_AUTHORIZED: | |
1781 | if (sta->sta_state != IEEE80211_STA_ASSOC) | |
1782 | return -EINVAL; | |
1783 | break; | |
1784 | default: | |
1785 | WARN(1, "invalid state %d", new_state); | |
1786 | return -EINVAL; | |
1787 | } | |
1788 | ||
bdcbd8e0 JB |
1789 | sta_dbg(sta->sdata, "moving STA %pM to state %d\n", |
1790 | sta->sta.addr, new_state); | |
f09603a2 JB |
1791 | |
1792 | /* | |
1793 | * notify the driver before the actual changes so it can | |
1794 | * fail the transition | |
1795 | */ | |
1796 | if (test_sta_flag(sta, WLAN_STA_INSERTED)) { | |
1797 | int err = drv_sta_state(sta->local, sta->sdata, sta, | |
1798 | sta->sta_state, new_state); | |
1799 | if (err) | |
1800 | return err; | |
1801 | } | |
1802 | ||
1803 | /* reflect the change in all state variables */ | |
1804 | ||
d9a7ddb0 JB |
1805 | switch (new_state) { |
1806 | case IEEE80211_STA_NONE: | |
1807 | if (sta->sta_state == IEEE80211_STA_AUTH) | |
1808 | clear_bit(WLAN_STA_AUTH, &sta->_flags); | |
d9a7ddb0 JB |
1809 | break; |
1810 | case IEEE80211_STA_AUTH: | |
1811 | if (sta->sta_state == IEEE80211_STA_NONE) | |
1812 | set_bit(WLAN_STA_AUTH, &sta->_flags); | |
1813 | else if (sta->sta_state == IEEE80211_STA_ASSOC) | |
1814 | clear_bit(WLAN_STA_ASSOC, &sta->_flags); | |
d9a7ddb0 JB |
1815 | break; |
1816 | case IEEE80211_STA_ASSOC: | |
29623892 | 1817 | if (sta->sta_state == IEEE80211_STA_AUTH) { |
d9a7ddb0 | 1818 | set_bit(WLAN_STA_ASSOC, &sta->_flags); |
29623892 | 1819 | } else if (sta->sta_state == IEEE80211_STA_AUTHORIZED) { |
7e3ed02c FF |
1820 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP || |
1821 | (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
1822 | !sta->sdata->u.vlan.sta)) | |
1823 | atomic_dec(&sta->sdata->bss->num_mcast_sta); | |
d9a7ddb0 | 1824 | clear_bit(WLAN_STA_AUTHORIZED, &sta->_flags); |
17c18bf8 | 1825 | ieee80211_clear_fast_xmit(sta); |
f09603a2 | 1826 | } |
d9a7ddb0 JB |
1827 | break; |
1828 | case IEEE80211_STA_AUTHORIZED: | |
29623892 | 1829 | if (sta->sta_state == IEEE80211_STA_ASSOC) { |
7e3ed02c FF |
1830 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP || |
1831 | (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
1832 | !sta->sdata->u.vlan.sta)) | |
1833 | atomic_inc(&sta->sdata->bss->num_mcast_sta); | |
d9a7ddb0 | 1834 | set_bit(WLAN_STA_AUTHORIZED, &sta->_flags); |
17c18bf8 | 1835 | ieee80211_check_fast_xmit(sta); |
f09603a2 | 1836 | } |
d9a7ddb0 JB |
1837 | break; |
1838 | default: | |
f09603a2 | 1839 | break; |
d9a7ddb0 JB |
1840 | } |
1841 | ||
d9a7ddb0 JB |
1842 | sta->sta_state = new_state; |
1843 | ||
1844 | return 0; | |
1845 | } | |
687da132 EG |
1846 | |
1847 | u8 sta_info_tx_streams(struct sta_info *sta) | |
1848 | { | |
1849 | struct ieee80211_sta_ht_cap *ht_cap = &sta->sta.ht_cap; | |
1850 | u8 rx_streams; | |
1851 | ||
1852 | if (!sta->sta.ht_cap.ht_supported) | |
1853 | return 1; | |
1854 | ||
1855 | if (sta->sta.vht_cap.vht_supported) { | |
1856 | int i; | |
1857 | u16 tx_mcs_map = | |
1858 | le16_to_cpu(sta->sta.vht_cap.vht_mcs.tx_mcs_map); | |
1859 | ||
1860 | for (i = 7; i >= 0; i--) | |
1861 | if ((tx_mcs_map & (0x3 << (i * 2))) != | |
1862 | IEEE80211_VHT_MCS_NOT_SUPPORTED) | |
1863 | return i + 1; | |
1864 | } | |
1865 | ||
1866 | if (ht_cap->mcs.rx_mask[3]) | |
1867 | rx_streams = 4; | |
1868 | else if (ht_cap->mcs.rx_mask[2]) | |
1869 | rx_streams = 3; | |
1870 | else if (ht_cap->mcs.rx_mask[1]) | |
1871 | rx_streams = 2; | |
1872 | else | |
1873 | rx_streams = 1; | |
1874 | ||
1875 | if (!(ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_RX_DIFF)) | |
1876 | return rx_streams; | |
1877 | ||
1878 | return ((ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK) | |
1879 | >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT) + 1; | |
1880 | } | |
b7ffbd7e | 1881 | |
fbd6ff5c JB |
1882 | static void sta_set_rate_info_rx(struct sta_info *sta, struct rate_info *rinfo) |
1883 | { | |
1884 | rinfo->flags = 0; | |
1885 | ||
e5a9f8d0 | 1886 | if (sta->rx_stats.last_rate_flag & RX_FLAG_HT) { |
fbd6ff5c | 1887 | rinfo->flags |= RATE_INFO_FLAGS_MCS; |
e5a9f8d0 JB |
1888 | rinfo->mcs = sta->rx_stats.last_rate_idx; |
1889 | } else if (sta->rx_stats.last_rate_flag & RX_FLAG_VHT) { | |
fbd6ff5c | 1890 | rinfo->flags |= RATE_INFO_FLAGS_VHT_MCS; |
e5a9f8d0 JB |
1891 | rinfo->nss = sta->rx_stats.last_rate_vht_nss; |
1892 | rinfo->mcs = sta->rx_stats.last_rate_idx; | |
fbd6ff5c JB |
1893 | } else { |
1894 | struct ieee80211_supported_band *sband; | |
1895 | int shift = ieee80211_vif_get_shift(&sta->sdata->vif); | |
1896 | u16 brate; | |
1897 | ||
1898 | sband = sta->local->hw.wiphy->bands[ | |
1899 | ieee80211_get_sdata_band(sta->sdata)]; | |
e5a9f8d0 | 1900 | brate = sband->bitrates[sta->rx_stats.last_rate_idx].bitrate; |
fbd6ff5c JB |
1901 | rinfo->legacy = DIV_ROUND_UP(brate, 1 << shift); |
1902 | } | |
1903 | ||
e5a9f8d0 | 1904 | if (sta->rx_stats.last_rate_flag & RX_FLAG_SHORT_GI) |
fbd6ff5c JB |
1905 | rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI; |
1906 | ||
e5a9f8d0 | 1907 | if (sta->rx_stats.last_rate_flag & RX_FLAG_5MHZ) |
fbd6ff5c | 1908 | rinfo->bw = RATE_INFO_BW_5; |
e5a9f8d0 | 1909 | else if (sta->rx_stats.last_rate_flag & RX_FLAG_10MHZ) |
fbd6ff5c | 1910 | rinfo->bw = RATE_INFO_BW_10; |
e5a9f8d0 | 1911 | else if (sta->rx_stats.last_rate_flag & RX_FLAG_40MHZ) |
fbd6ff5c | 1912 | rinfo->bw = RATE_INFO_BW_40; |
e5a9f8d0 | 1913 | else if (sta->rx_stats.last_rate_vht_flag & RX_VHT_FLAG_80MHZ) |
fbd6ff5c | 1914 | rinfo->bw = RATE_INFO_BW_80; |
e5a9f8d0 | 1915 | else if (sta->rx_stats.last_rate_vht_flag & RX_VHT_FLAG_160MHZ) |
fbd6ff5c JB |
1916 | rinfo->bw = RATE_INFO_BW_160; |
1917 | else | |
1918 | rinfo->bw = RATE_INFO_BW_20; | |
1919 | } | |
1920 | ||
b7ffbd7e JB |
1921 | void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo) |
1922 | { | |
1923 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
1924 | struct ieee80211_local *local = sdata->local; | |
9a244409 | 1925 | struct rate_control_ref *ref = NULL; |
b7ffbd7e JB |
1926 | u32 thr = 0; |
1927 | int i, ac; | |
1928 | ||
9a244409 JL |
1929 | if (test_sta_flag(sta, WLAN_STA_RATE_CONTROL)) |
1930 | ref = local->rate_ctrl; | |
1931 | ||
b7ffbd7e JB |
1932 | sinfo->generation = sdata->local->sta_generation; |
1933 | ||
225b8189 JB |
1934 | /* do before driver, so beacon filtering drivers have a |
1935 | * chance to e.g. just add the number of filtered beacons | |
1936 | * (or just modify the value entirely, of course) | |
1937 | */ | |
1938 | if (sdata->vif.type == NL80211_IFTYPE_STATION) | |
1939 | sinfo->rx_beacon = sdata->u.mgd.count_beacon_signal; | |
1940 | ||
2b9a7e1b JB |
1941 | drv_sta_statistics(local, sdata, &sta->sta, sinfo); |
1942 | ||
319090bf JB |
1943 | sinfo->filled |= BIT(NL80211_STA_INFO_INACTIVE_TIME) | |
1944 | BIT(NL80211_STA_INFO_STA_FLAGS) | | |
1945 | BIT(NL80211_STA_INFO_BSS_PARAM) | | |
1946 | BIT(NL80211_STA_INFO_CONNECTED_TIME) | | |
976bd9ef JB |
1947 | BIT(NL80211_STA_INFO_RX_DROP_MISC); |
1948 | ||
1949 | if (sdata->vif.type == NL80211_IFTYPE_STATION) { | |
1950 | sinfo->beacon_loss_count = sdata->u.mgd.beacon_loss_count; | |
1951 | sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_LOSS); | |
1952 | } | |
b7ffbd7e | 1953 | |
84b00607 | 1954 | sinfo->connected_time = ktime_get_seconds() - sta->last_connected; |
e5a9f8d0 JB |
1955 | sinfo->inactive_time = |
1956 | jiffies_to_msecs(jiffies - sta->rx_stats.last_rx); | |
2b9a7e1b | 1957 | |
319090bf JB |
1958 | if (!(sinfo->filled & (BIT(NL80211_STA_INFO_TX_BYTES64) | |
1959 | BIT(NL80211_STA_INFO_TX_BYTES)))) { | |
2b9a7e1b JB |
1960 | sinfo->tx_bytes = 0; |
1961 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) | |
e5a9f8d0 | 1962 | sinfo->tx_bytes += sta->tx_stats.bytes[ac]; |
319090bf | 1963 | sinfo->filled |= BIT(NL80211_STA_INFO_TX_BYTES64); |
2b9a7e1b JB |
1964 | } |
1965 | ||
319090bf | 1966 | if (!(sinfo->filled & BIT(NL80211_STA_INFO_TX_PACKETS))) { |
2b9a7e1b JB |
1967 | sinfo->tx_packets = 0; |
1968 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) | |
e5a9f8d0 | 1969 | sinfo->tx_packets += sta->tx_stats.packets[ac]; |
319090bf | 1970 | sinfo->filled |= BIT(NL80211_STA_INFO_TX_PACKETS); |
2b9a7e1b JB |
1971 | } |
1972 | ||
319090bf JB |
1973 | if (!(sinfo->filled & (BIT(NL80211_STA_INFO_RX_BYTES64) | |
1974 | BIT(NL80211_STA_INFO_RX_BYTES)))) { | |
e5a9f8d0 | 1975 | sinfo->rx_bytes = sta->rx_stats.bytes; |
319090bf | 1976 | sinfo->filled |= BIT(NL80211_STA_INFO_RX_BYTES64); |
2b9a7e1b JB |
1977 | } |
1978 | ||
319090bf | 1979 | if (!(sinfo->filled & BIT(NL80211_STA_INFO_RX_PACKETS))) { |
e5a9f8d0 | 1980 | sinfo->rx_packets = sta->rx_stats.packets; |
319090bf | 1981 | sinfo->filled |= BIT(NL80211_STA_INFO_RX_PACKETS); |
2b9a7e1b JB |
1982 | } |
1983 | ||
319090bf | 1984 | if (!(sinfo->filled & BIT(NL80211_STA_INFO_TX_RETRIES))) { |
e5a9f8d0 | 1985 | sinfo->tx_retries = sta->status_stats.retry_count; |
319090bf | 1986 | sinfo->filled |= BIT(NL80211_STA_INFO_TX_RETRIES); |
2b9a7e1b JB |
1987 | } |
1988 | ||
319090bf | 1989 | if (!(sinfo->filled & BIT(NL80211_STA_INFO_TX_FAILED))) { |
e5a9f8d0 | 1990 | sinfo->tx_failed = sta->status_stats.retry_failed; |
319090bf | 1991 | sinfo->filled |= BIT(NL80211_STA_INFO_TX_FAILED); |
b7ffbd7e | 1992 | } |
2b9a7e1b | 1993 | |
e5a9f8d0 | 1994 | sinfo->rx_dropped_misc = sta->rx_stats.dropped; |
b7ffbd7e | 1995 | |
225b8189 JB |
1996 | if (sdata->vif.type == NL80211_IFTYPE_STATION && |
1997 | !(sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)) { | |
1998 | sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_RX) | | |
1999 | BIT(NL80211_STA_INFO_BEACON_SIGNAL_AVG); | |
2000 | sinfo->rx_beacon_signal_avg = ieee80211_ave_rssi(&sdata->vif); | |
2001 | } | |
2002 | ||
30686bf7 JB |
2003 | if (ieee80211_hw_check(&sta->local->hw, SIGNAL_DBM) || |
2004 | ieee80211_hw_check(&sta->local->hw, SIGNAL_UNSPEC)) { | |
319090bf | 2005 | if (!(sinfo->filled & BIT(NL80211_STA_INFO_SIGNAL))) { |
e5a9f8d0 | 2006 | sinfo->signal = (s8)sta->rx_stats.last_signal; |
319090bf | 2007 | sinfo->filled |= BIT(NL80211_STA_INFO_SIGNAL); |
2b9a7e1b JB |
2008 | } |
2009 | ||
319090bf | 2010 | if (!(sinfo->filled & BIT(NL80211_STA_INFO_SIGNAL_AVG))) { |
40d9a38a | 2011 | sinfo->signal_avg = |
e5a9f8d0 | 2012 | -ewma_signal_read(&sta->rx_stats.avg_signal); |
319090bf | 2013 | sinfo->filled |= BIT(NL80211_STA_INFO_SIGNAL_AVG); |
2b9a7e1b | 2014 | } |
b7ffbd7e | 2015 | } |
2b9a7e1b | 2016 | |
e5a9f8d0 | 2017 | if (sta->rx_stats.chains && |
319090bf JB |
2018 | !(sinfo->filled & (BIT(NL80211_STA_INFO_CHAIN_SIGNAL) | |
2019 | BIT(NL80211_STA_INFO_CHAIN_SIGNAL_AVG)))) { | |
2020 | sinfo->filled |= BIT(NL80211_STA_INFO_CHAIN_SIGNAL) | | |
2021 | BIT(NL80211_STA_INFO_CHAIN_SIGNAL_AVG); | |
b7ffbd7e | 2022 | |
e5a9f8d0 | 2023 | sinfo->chains = sta->rx_stats.chains; |
b7ffbd7e | 2024 | for (i = 0; i < ARRAY_SIZE(sinfo->chain_signal); i++) { |
e5a9f8d0 JB |
2025 | sinfo->chain_signal[i] = |
2026 | sta->rx_stats.chain_signal_last[i]; | |
b7ffbd7e | 2027 | sinfo->chain_signal_avg[i] = |
e5a9f8d0 | 2028 | -ewma_signal_read(&sta->rx_stats.chain_signal_avg[i]); |
b7ffbd7e JB |
2029 | } |
2030 | } | |
2031 | ||
319090bf | 2032 | if (!(sinfo->filled & BIT(NL80211_STA_INFO_TX_BITRATE))) { |
e5a9f8d0 JB |
2033 | sta_set_rate_info_tx(sta, &sta->tx_stats.last_rate, |
2034 | &sinfo->txrate); | |
319090bf | 2035 | sinfo->filled |= BIT(NL80211_STA_INFO_TX_BITRATE); |
2b9a7e1b JB |
2036 | } |
2037 | ||
319090bf | 2038 | if (!(sinfo->filled & BIT(NL80211_STA_INFO_RX_BITRATE))) { |
2b9a7e1b | 2039 | sta_set_rate_info_rx(sta, &sinfo->rxrate); |
319090bf | 2040 | sinfo->filled |= BIT(NL80211_STA_INFO_RX_BITRATE); |
2b9a7e1b | 2041 | } |
b7ffbd7e | 2042 | |
79c892b8 JB |
2043 | sinfo->filled |= BIT(NL80211_STA_INFO_TID_STATS); |
2044 | for (i = 0; i < IEEE80211_NUM_TIDS + 1; i++) { | |
2045 | struct cfg80211_tid_stats *tidstats = &sinfo->pertid[i]; | |
2046 | ||
2047 | if (!(tidstats->filled & BIT(NL80211_TID_STATS_RX_MSDU))) { | |
2048 | tidstats->filled |= BIT(NL80211_TID_STATS_RX_MSDU); | |
e5a9f8d0 | 2049 | tidstats->rx_msdu = sta->rx_stats.msdu[i]; |
79c892b8 JB |
2050 | } |
2051 | ||
2052 | if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU))) { | |
2053 | tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU); | |
e5a9f8d0 | 2054 | tidstats->tx_msdu = sta->tx_stats.msdu[i]; |
79c892b8 JB |
2055 | } |
2056 | ||
2057 | if (!(tidstats->filled & | |
2058 | BIT(NL80211_TID_STATS_TX_MSDU_RETRIES)) && | |
30686bf7 | 2059 | ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { |
79c892b8 JB |
2060 | tidstats->filled |= |
2061 | BIT(NL80211_TID_STATS_TX_MSDU_RETRIES); | |
e5a9f8d0 JB |
2062 | tidstats->tx_msdu_retries = |
2063 | sta->status_stats.msdu_retries[i]; | |
79c892b8 JB |
2064 | } |
2065 | ||
2066 | if (!(tidstats->filled & | |
2067 | BIT(NL80211_TID_STATS_TX_MSDU_FAILED)) && | |
30686bf7 | 2068 | ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { |
79c892b8 JB |
2069 | tidstats->filled |= |
2070 | BIT(NL80211_TID_STATS_TX_MSDU_FAILED); | |
e5a9f8d0 JB |
2071 | tidstats->tx_msdu_failed = |
2072 | sta->status_stats.msdu_failed[i]; | |
79c892b8 JB |
2073 | } |
2074 | } | |
2075 | ||
b7ffbd7e JB |
2076 | if (ieee80211_vif_is_mesh(&sdata->vif)) { |
2077 | #ifdef CONFIG_MAC80211_MESH | |
319090bf JB |
2078 | sinfo->filled |= BIT(NL80211_STA_INFO_LLID) | |
2079 | BIT(NL80211_STA_INFO_PLID) | | |
2080 | BIT(NL80211_STA_INFO_PLINK_STATE) | | |
2081 | BIT(NL80211_STA_INFO_LOCAL_PM) | | |
2082 | BIT(NL80211_STA_INFO_PEER_PM) | | |
2083 | BIT(NL80211_STA_INFO_NONPEER_PM); | |
b7ffbd7e | 2084 | |
433f5bc1 JB |
2085 | sinfo->llid = sta->mesh->llid; |
2086 | sinfo->plid = sta->mesh->plid; | |
2087 | sinfo->plink_state = sta->mesh->plink_state; | |
b7ffbd7e | 2088 | if (test_sta_flag(sta, WLAN_STA_TOFFSET_KNOWN)) { |
319090bf | 2089 | sinfo->filled |= BIT(NL80211_STA_INFO_T_OFFSET); |
433f5bc1 | 2090 | sinfo->t_offset = sta->mesh->t_offset; |
b7ffbd7e | 2091 | } |
433f5bc1 JB |
2092 | sinfo->local_pm = sta->mesh->local_pm; |
2093 | sinfo->peer_pm = sta->mesh->peer_pm; | |
2094 | sinfo->nonpeer_pm = sta->mesh->nonpeer_pm; | |
b7ffbd7e JB |
2095 | #endif |
2096 | } | |
2097 | ||
2098 | sinfo->bss_param.flags = 0; | |
2099 | if (sdata->vif.bss_conf.use_cts_prot) | |
2100 | sinfo->bss_param.flags |= BSS_PARAM_FLAGS_CTS_PROT; | |
2101 | if (sdata->vif.bss_conf.use_short_preamble) | |
2102 | sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_PREAMBLE; | |
2103 | if (sdata->vif.bss_conf.use_short_slot) | |
2104 | sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_SLOT_TIME; | |
785e21a8 | 2105 | sinfo->bss_param.dtim_period = sdata->vif.bss_conf.dtim_period; |
b7ffbd7e JB |
2106 | sinfo->bss_param.beacon_interval = sdata->vif.bss_conf.beacon_int; |
2107 | ||
2108 | sinfo->sta_flags.set = 0; | |
2109 | sinfo->sta_flags.mask = BIT(NL80211_STA_FLAG_AUTHORIZED) | | |
2110 | BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) | | |
2111 | BIT(NL80211_STA_FLAG_WME) | | |
2112 | BIT(NL80211_STA_FLAG_MFP) | | |
2113 | BIT(NL80211_STA_FLAG_AUTHENTICATED) | | |
2114 | BIT(NL80211_STA_FLAG_ASSOCIATED) | | |
2115 | BIT(NL80211_STA_FLAG_TDLS_PEER); | |
2116 | if (test_sta_flag(sta, WLAN_STA_AUTHORIZED)) | |
2117 | sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHORIZED); | |
2118 | if (test_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE)) | |
2119 | sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE); | |
a74a8c84 | 2120 | if (sta->sta.wme) |
b7ffbd7e JB |
2121 | sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_WME); |
2122 | if (test_sta_flag(sta, WLAN_STA_MFP)) | |
2123 | sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_MFP); | |
2124 | if (test_sta_flag(sta, WLAN_STA_AUTH)) | |
2125 | sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHENTICATED); | |
2126 | if (test_sta_flag(sta, WLAN_STA_ASSOC)) | |
2127 | sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_ASSOCIATED); | |
2128 | if (test_sta_flag(sta, WLAN_STA_TDLS_PEER)) | |
2129 | sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_TDLS_PEER); | |
2130 | ||
2131 | /* check if the driver has a SW RC implementation */ | |
2132 | if (ref && ref->ops->get_expected_throughput) | |
2133 | thr = ref->ops->get_expected_throughput(sta->rate_ctrl_priv); | |
2134 | else | |
2135 | thr = drv_get_expected_throughput(local, &sta->sta); | |
2136 | ||
2137 | if (thr != 0) { | |
319090bf | 2138 | sinfo->filled |= BIT(NL80211_STA_INFO_EXPECTED_THROUGHPUT); |
b7ffbd7e JB |
2139 | sinfo->expected_throughput = thr; |
2140 | } | |
2141 | } |