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 */ | |
b6bf8c68 | 70 | .insecure_elasticity = true, /* Disable chain-length checks. */ |
caf22d31 | 71 | .automatic_shrinking = true, |
7bedd0cf | 72 | .head_offset = offsetof(struct sta_info, hash_node), |
ac100ce5 | 73 | .key_offset = offsetof(struct sta_info, addr), |
7bedd0cf JB |
74 | .key_len = ETH_ALEN, |
75 | .hashfn = sta_addr_hash, | |
ebd82b39 | 76 | .max_size = CONFIG_MAC80211_STA_HASH_MAX_SIZE, |
7bedd0cf JB |
77 | }; |
78 | ||
4d33960b | 79 | /* Caller must hold local->sta_mtx */ |
be8755e1 MW |
80 | static int sta_info_hash_del(struct ieee80211_local *local, |
81 | struct sta_info *sta) | |
f0706e82 | 82 | { |
7bedd0cf JB |
83 | return rhashtable_remove_fast(&local->sta_hash, &sta->hash_node, |
84 | sta_rht_params); | |
f0706e82 JB |
85 | } |
86 | ||
5108ca82 | 87 | static void __cleanup_single_sta(struct sta_info *sta) |
b22cfcfc | 88 | { |
b22cfcfc EP |
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; | |
d012a605 | 93 | struct ps_data *ps; |
b22cfcfc | 94 | |
e3685e03 | 95 | if (test_sta_flag(sta, WLAN_STA_PS_STA) || |
5ac2e350 JB |
96 | test_sta_flag(sta, WLAN_STA_PS_DRIVER) || |
97 | test_sta_flag(sta, WLAN_STA_PS_DELIVER)) { | |
d012a605 MP |
98 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP || |
99 | sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
100 | ps = &sdata->bss->ps; | |
3f52b7e3 MP |
101 | else if (ieee80211_vif_is_mesh(&sdata->vif)) |
102 | ps = &sdata->u.mesh.ps; | |
d012a605 MP |
103 | else |
104 | return; | |
b22cfcfc EP |
105 | |
106 | clear_sta_flag(sta, WLAN_STA_PS_STA); | |
e3685e03 | 107 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); |
5ac2e350 | 108 | clear_sta_flag(sta, WLAN_STA_PS_DELIVER); |
b22cfcfc | 109 | |
d012a605 | 110 | atomic_dec(&ps->num_sta_ps); |
b22cfcfc EP |
111 | } |
112 | ||
ba8c3d6f FF |
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]); | |
f2ac7e30 | 120 | txqi->byte_cnt = 0; |
ba8c3d6f FF |
121 | } |
122 | } | |
123 | ||
b22cfcfc EP |
124 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { |
125 | local->total_ps_buffered -= skb_queue_len(&sta->ps_tx_buf[ac]); | |
1f98ab7f FF |
126 | ieee80211_purge_tx_queue(&local->hw, &sta->ps_tx_buf[ac]); |
127 | ieee80211_purge_tx_queue(&local->hw, &sta->tx_filtered[ac]); | |
b22cfcfc EP |
128 | } |
129 | ||
45b5028e TP |
130 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
131 | mesh_sta_cleanup(sta); | |
b22cfcfc | 132 | |
5ac2e350 | 133 | cancel_work_sync(&sta->drv_deliver_wk); |
b22cfcfc EP |
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 | */ | |
5a306f58 | 141 | for (i = 0; i < IEEE80211_NUM_TIDS; i++) { |
661eb381 | 142 | kfree(sta->ampdu_mlme.tid_start_tx[i]); |
b22cfcfc EP |
143 | tid_tx = rcu_dereference_raw(sta->ampdu_mlme.tid_tx[i]); |
144 | if (!tid_tx) | |
145 | continue; | |
1f98ab7f | 146 | ieee80211_purge_tx_queue(&local->hw, &tid_tx->pending); |
b22cfcfc EP |
147 | kfree(tid_tx); |
148 | } | |
5108ca82 | 149 | } |
b22cfcfc | 150 | |
5108ca82 JB |
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); | |
b22cfcfc EP |
157 | sta_info_free(local, sta); |
158 | } | |
159 | ||
d0709a65 | 160 | /* protected by RCU */ |
abe60632 JB |
161 | struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata, |
162 | const u8 *addr) | |
f0706e82 | 163 | { |
abe60632 | 164 | struct ieee80211_local *local = sdata->local; |
60f4b626 JB |
165 | struct sta_info *sta; |
166 | struct rhash_head *tmp; | |
167 | const struct bucket_table *tbl; | |
f0706e82 | 168 | |
60f4b626 JB |
169 | rcu_read_lock(); |
170 | tbl = rht_dereference_rcu(local->sta_hash.tbl, &local->sta_hash); | |
f0706e82 | 171 | |
60f4b626 JB |
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; | |
43ba7e95 JB |
183 | } |
184 | ||
0e5ded5a FF |
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; | |
7bedd0cf JB |
194 | struct rhash_head *tmp; |
195 | const struct bucket_table *tbl; | |
0e5ded5a | 196 | |
7bedd0cf JB |
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 | } | |
0e5ded5a | 209 | } |
7bedd0cf JB |
210 | rcu_read_unlock(); |
211 | return NULL; | |
0e5ded5a FF |
212 | } |
213 | ||
3b53fde8 JB |
214 | struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata, |
215 | int idx) | |
ee385855 | 216 | { |
3b53fde8 | 217 | struct ieee80211_local *local = sdata->local; |
ee385855 LCC |
218 | struct sta_info *sta; |
219 | int i = 0; | |
220 | ||
d0709a65 | 221 | list_for_each_entry_rcu(sta, &local->sta_list, list) { |
3b53fde8 | 222 | if (sdata != sta->sdata) |
2a8ca29a | 223 | continue; |
ee385855 LCC |
224 | if (i < idx) { |
225 | ++i; | |
226 | continue; | |
ee385855 | 227 | } |
2a8ca29a | 228 | return sta; |
ee385855 | 229 | } |
ee385855 LCC |
230 | |
231 | return NULL; | |
232 | } | |
f0706e82 | 233 | |
93e5deb1 | 234 | /** |
d9a7ddb0 | 235 | * sta_info_free - free STA |
93e5deb1 | 236 | * |
6ef307bc | 237 | * @local: pointer to the global information |
93e5deb1 JB |
238 | * @sta: STA info to free |
239 | * | |
240 | * This function must undo everything done by sta_info_alloc() | |
d9a7ddb0 JB |
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.) | |
93e5deb1 | 244 | */ |
d9a7ddb0 | 245 | void sta_info_free(struct ieee80211_local *local, struct sta_info *sta) |
93e5deb1 | 246 | { |
889cbb91 | 247 | if (sta->rate_ctrl) |
af65cd96 | 248 | rate_control_free_sta(sta); |
93e5deb1 | 249 | |
bdcbd8e0 | 250 | sta_dbg(sta->sdata, "Destroyed STA %pM\n", sta->sta.addr); |
93e5deb1 | 251 | |
ba8c3d6f FF |
252 | if (sta->sta.txq[0]) |
253 | kfree(to_txq_info(sta->sta.txq[0])); | |
53d04525 | 254 | kfree(rcu_dereference_raw(sta->sta.rates)); |
433f5bc1 JB |
255 | #ifdef CONFIG_MAC80211_MESH |
256 | kfree(sta->mesh); | |
257 | #endif | |
93e5deb1 JB |
258 | kfree(sta); |
259 | } | |
260 | ||
4d33960b | 261 | /* Caller must hold local->sta_mtx */ |
62b14b24 JB |
262 | static int sta_info_hash_add(struct ieee80211_local *local, |
263 | struct sta_info *sta) | |
f0706e82 | 264 | { |
62b14b24 JB |
265 | return rhashtable_insert_fast(&local->sta_hash, &sta->hash_node, |
266 | sta_rht_params); | |
f0706e82 | 267 | } |
f0706e82 | 268 | |
5ac2e350 | 269 | static void sta_deliver_ps_frames(struct work_struct *wk) |
af818581 JB |
270 | { |
271 | struct sta_info *sta; | |
272 | ||
5ac2e350 | 273 | sta = container_of(wk, struct sta_info, drv_deliver_wk); |
af818581 JB |
274 | |
275 | if (sta->dead) | |
276 | return; | |
277 | ||
5ac2e350 JB |
278 | local_bh_disable(); |
279 | if (!test_sta_flag(sta, WLAN_STA_PS_STA)) | |
af818581 | 280 | ieee80211_sta_ps_deliver_wakeup(sta); |
5ac2e350 | 281 | else if (test_and_clear_sta_flag(sta, WLAN_STA_PSPOLL)) |
af818581 | 282 | ieee80211_sta_ps_deliver_poll_response(sta); |
5ac2e350 | 283 | else if (test_and_clear_sta_flag(sta, WLAN_STA_UAPSD)) |
47086fc5 | 284 | ieee80211_sta_ps_deliver_uapsd(sta); |
5ac2e350 | 285 | local_bh_enable(); |
af818581 JB |
286 | } |
287 | ||
af65cd96 JB |
288 | static int sta_prepare_rate_control(struct ieee80211_local *local, |
289 | struct sta_info *sta, gfp_t gfp) | |
290 | { | |
30686bf7 | 291 | if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) |
af65cd96 JB |
292 | return 0; |
293 | ||
889cbb91 | 294 | sta->rate_ctrl = local->rate_ctrl; |
af65cd96 | 295 | sta->rate_ctrl_priv = rate_control_alloc_sta(sta->rate_ctrl, |
35c347ac | 296 | sta, gfp); |
889cbb91 | 297 | if (!sta->rate_ctrl_priv) |
af65cd96 | 298 | return -ENOMEM; |
af65cd96 JB |
299 | |
300 | return 0; | |
301 | } | |
302 | ||
73651ee6 | 303 | struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata, |
56544160 | 304 | const u8 *addr, gfp_t gfp) |
f0706e82 | 305 | { |
d0709a65 | 306 | struct ieee80211_local *local = sdata->local; |
ba8c3d6f | 307 | struct ieee80211_hw *hw = &local->hw; |
f0706e82 | 308 | struct sta_info *sta; |
16c5f15c | 309 | int i; |
f0706e82 | 310 | |
ba8c3d6f | 311 | sta = kzalloc(sizeof(*sta) + hw->sta_data_size, gfp); |
f0706e82 | 312 | if (!sta) |
73651ee6 | 313 | return NULL; |
f0706e82 | 314 | |
07346f81 | 315 | spin_lock_init(&sta->lock); |
1d147bfa | 316 | spin_lock_init(&sta->ps_lock); |
5ac2e350 | 317 | INIT_WORK(&sta->drv_deliver_wk, sta_deliver_ps_frames); |
67c282c0 | 318 | INIT_WORK(&sta->ampdu_mlme.work, ieee80211_ba_session_work); |
a93e3644 | 319 | mutex_init(&sta->ampdu_mlme.mtx); |
87f59c70 | 320 | #ifdef CONFIG_MAC80211_MESH |
433f5bc1 JB |
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 | } | |
87f59c70 | 331 | #endif |
07346f81 | 332 | |
ac100ce5 | 333 | memcpy(sta->addr, addr, ETH_ALEN); |
17741cdc | 334 | memcpy(sta->sta.addr, addr, ETH_ALEN); |
d0709a65 JB |
335 | sta->local = local; |
336 | sta->sdata = sdata; | |
e5a9f8d0 | 337 | sta->rx_stats.last_rx = jiffies; |
f0706e82 | 338 | |
71ec375c JB |
339 | sta->sta_state = IEEE80211_STA_NONE; |
340 | ||
b6da911b LK |
341 | /* Mark TID as unreserved */ |
342 | sta->reserved_tid = IEEE80211_TID_UNRESERVED; | |
343 | ||
84b00607 | 344 | sta->last_connected = ktime_get_seconds(); |
e5a9f8d0 JB |
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]); | |
541a45a1 | 348 | |
ba8c3d6f FF |
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 | } | |
abfbc3af | 363 | } |
f0706e82 | 364 | |
ba8c3d6f FF |
365 | if (sta_prepare_rate_control(local, sta, gfp)) |
366 | goto free_txq; | |
367 | ||
5a306f58 | 368 | for (i = 0; i < IEEE80211_NUM_TIDS; i++) { |
a622ab72 JB |
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 | */ | |
16c5f15c | 374 | sta->timer_to_tid[i] = i; |
16c5f15c | 375 | } |
948d887d JB |
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 | } | |
73651ee6 | 380 | |
5a306f58 | 381 | for (i = 0; i < IEEE80211_NUM_TIDS; i++) |
4be929be | 382 | sta->last_seq_ctrl[i] = cpu_to_le16(USHRT_MAX); |
cccaec98 | 383 | |
af0ed69b | 384 | sta->sta.smps_mode = IEEE80211_SMPS_OFF; |
687da132 EG |
385 | if (sdata->vif.type == NL80211_IFTYPE_AP || |
386 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { | |
387 | struct ieee80211_supported_band *sband = | |
ba8c3d6f | 388 | hw->wiphy->bands[ieee80211_get_sdata_band(sdata)]; |
687da132 EG |
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 | } | |
af0ed69b | 409 | |
bdcbd8e0 | 410 | sta_dbg(sdata, "Allocated STA %pM\n", sta->sta.addr); |
ef04a297 | 411 | |
abfbc3af | 412 | return sta; |
ba8c3d6f FF |
413 | |
414 | free_txq: | |
415 | if (sta->sta.txq[0]) | |
416 | kfree(to_txq_info(sta->sta.txq[0])); | |
417 | free: | |
433f5bc1 JB |
418 | #ifdef CONFIG_MAC80211_MESH |
419 | kfree(sta->mesh); | |
420 | #endif | |
ba8c3d6f FF |
421 | kfree(sta); |
422 | return NULL; | |
73651ee6 JB |
423 | } |
424 | ||
8c71df7a | 425 | static int sta_info_insert_check(struct sta_info *sta) |
34e89507 | 426 | { |
34e89507 | 427 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
34e89507 | 428 | |
03e4497e JB |
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 | */ | |
8c71df7a GE |
434 | if (unlikely(!ieee80211_sdata_running(sdata))) |
435 | return -ENETDOWN; | |
03e4497e | 436 | |
b203ca39 | 437 | if (WARN_ON(ether_addr_equal(sta->sta.addr, sdata->vif.addr) || |
8c71df7a GE |
438 | is_multicast_ether_addr(sta->sta.addr))) |
439 | return -EINVAL; | |
440 | ||
31104891 JB |
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 | ||
8c71df7a GE |
454 | return 0; |
455 | } | |
456 | ||
f09603a2 JB |
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) { | |
a4ec45a4 JB |
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; | |
f09603a2 JB |
477 | return 0; |
478 | } | |
479 | ||
480 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { | |
bdcbd8e0 JB |
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); | |
f09603a2 JB |
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 | ||
8c71df7a GE |
494 | /* |
495 | * should be called with sta_mtx locked | |
496 | * this function replaces the mutex lock | |
497 | * with a RCU lock | |
498 | */ | |
4d33960b | 499 | static int sta_info_insert_finish(struct sta_info *sta) __acquires(RCU) |
8c71df7a GE |
500 | { |
501 | struct ieee80211_local *local = sta->local; | |
502 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
0ef049dc | 503 | struct station_info *sinfo; |
8c71df7a GE |
504 | int err = 0; |
505 | ||
506 | lockdep_assert_held(&local->sta_mtx); | |
34e89507 | 507 | |
0ef049dc AB |
508 | sinfo = kzalloc(sizeof(struct station_info), GFP_KERNEL); |
509 | if (!sinfo) { | |
510 | err = -ENOMEM; | |
511 | goto out_err; | |
512 | } | |
513 | ||
7852e361 JB |
514 | /* check if STA exists already */ |
515 | if (sta_info_get_bss(sdata, sta->sta.addr)) { | |
516 | err = -EEXIST; | |
517 | goto out_err; | |
4d33960b | 518 | } |
32bfd35d | 519 | |
7852e361 JB |
520 | local->num_sta++; |
521 | local->sta_generation++; | |
522 | smp_mb(); | |
4d33960b | 523 | |
5108ca82 JB |
524 | /* simplify things and don't accept BA sessions yet */ |
525 | set_sta_flag(sta, WLAN_STA_BLOCK_BA); | |
526 | ||
7852e361 | 527 | /* make the station visible */ |
62b14b24 JB |
528 | err = sta_info_hash_add(local, sta); |
529 | if (err) | |
530 | goto out_drop_sta; | |
83d5cc01 | 531 | |
2bad7748 | 532 | list_add_tail_rcu(&sta->list, &local->sta_list); |
4d33960b | 533 | |
5108ca82 JB |
534 | /* notify driver */ |
535 | err = sta_info_insert_drv_state(local, sdata, sta); | |
536 | if (err) | |
537 | goto out_remove; | |
538 | ||
7852e361 | 539 | set_sta_flag(sta, WLAN_STA_INSERTED); |
5108ca82 JB |
540 | /* accept BA sessions now */ |
541 | clear_sta_flag(sta, WLAN_STA_BLOCK_BA); | |
4d33960b | 542 | |
7852e361 JB |
543 | ieee80211_sta_debugfs_add(sta); |
544 | rate_control_add_sta_debugfs(sta); | |
4d33960b | 545 | |
0ef049dc AB |
546 | sinfo->generation = local->sta_generation; |
547 | cfg80211_new_sta(sdata->dev, sta->sta.addr, sinfo, GFP_KERNEL); | |
548 | kfree(sinfo); | |
d0709a65 | 549 | |
bdcbd8e0 | 550 | sta_dbg(sdata, "Inserted STA %pM\n", sta->sta.addr); |
f0706e82 | 551 | |
34e89507 JB |
552 | /* move reference to rcu-protected */ |
553 | rcu_read_lock(); | |
554 | mutex_unlock(&local->sta_mtx); | |
e9f207f0 | 555 | |
73651ee6 JB |
556 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
557 | mesh_accept_plinks_update(sdata); | |
558 | ||
8c71df7a | 559 | return 0; |
5108ca82 JB |
560 | out_remove: |
561 | sta_info_hash_del(local, sta); | |
562 | list_del_rcu(&sta->list); | |
62b14b24 | 563 | out_drop_sta: |
5108ca82 JB |
564 | local->num_sta--; |
565 | synchronize_net(); | |
566 | __cleanup_single_sta(sta); | |
4d33960b JB |
567 | out_err: |
568 | mutex_unlock(&local->sta_mtx); | |
ea32f065 | 569 | kfree(sinfo); |
4d33960b JB |
570 | rcu_read_lock(); |
571 | return err; | |
8c71df7a GE |
572 | } |
573 | ||
574 | int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU) | |
575 | { | |
576 | struct ieee80211_local *local = sta->local; | |
308f7fcf | 577 | int err; |
8c71df7a | 578 | |
4d33960b JB |
579 | might_sleep(); |
580 | ||
31104891 JB |
581 | mutex_lock(&local->sta_mtx); |
582 | ||
8c71df7a GE |
583 | err = sta_info_insert_check(sta); |
584 | if (err) { | |
31104891 | 585 | mutex_unlock(&local->sta_mtx); |
8c71df7a GE |
586 | rcu_read_lock(); |
587 | goto out_free; | |
588 | } | |
589 | ||
4d33960b | 590 | err = sta_info_insert_finish(sta); |
8c71df7a GE |
591 | if (err) |
592 | goto out_free; | |
593 | ||
73651ee6 | 594 | return 0; |
93e5deb1 | 595 | out_free: |
d9a7ddb0 | 596 | sta_info_free(local, sta); |
93e5deb1 | 597 | return err; |
f0706e82 JB |
598 | } |
599 | ||
34e89507 JB |
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 | ||
d012a605 | 609 | static inline void __bss_tim_set(u8 *tim, u16 id) |
004c872e JB |
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 | */ | |
d012a605 | 615 | tim[id / 8] |= (1 << (id % 8)); |
004c872e JB |
616 | } |
617 | ||
d012a605 | 618 | static inline void __bss_tim_clear(u8 *tim, u16 id) |
004c872e JB |
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 | */ | |
d012a605 | 624 | tim[id / 8] &= ~(1 << (id % 8)); |
004c872e JB |
625 | } |
626 | ||
3d5839b6 IP |
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 | ||
948d887d | 636 | static unsigned long ieee80211_tids_for_ac(int ac) |
004c872e | 637 | { |
948d887d JB |
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; | |
d0709a65 | 651 | } |
004c872e JB |
652 | } |
653 | ||
9b7a86f3 | 654 | static void __sta_info_recalc_tim(struct sta_info *sta, bool ignore_pending) |
004c872e | 655 | { |
c868cb35 | 656 | struct ieee80211_local *local = sta->local; |
d012a605 | 657 | struct ps_data *ps; |
948d887d JB |
658 | bool indicate_tim = false; |
659 | u8 ignore_for_tim = sta->sta.uapsd_queues; | |
660 | int ac; | |
a69bd8e6 | 661 | u16 id = sta->sta.aid; |
d012a605 MP |
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; | |
004c872e | 667 | |
d012a605 | 668 | ps = &sta->sdata->bss->ps; |
3f52b7e3 MP |
669 | #ifdef CONFIG_MAC80211_MESH |
670 | } else if (ieee80211_vif_is_mesh(&sta->sdata->vif)) { | |
671 | ps = &sta->sdata->u.mesh.ps; | |
3f52b7e3 | 672 | #endif |
d012a605 | 673 | } else { |
c868cb35 | 674 | return; |
d012a605 | 675 | } |
3e122be0 | 676 | |
c868cb35 | 677 | /* No need to do anything if the driver does all */ |
30686bf7 | 678 | if (ieee80211_hw_check(&local->hw, AP_LINK_PS)) |
c868cb35 | 679 | return; |
004c872e | 680 | |
c868cb35 JB |
681 | if (sta->dead) |
682 | goto done; | |
3e122be0 | 683 | |
948d887d JB |
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 | ||
9b7a86f3 JB |
693 | if (ignore_pending) |
694 | ignore_for_tim = BIT(IEEE80211_NUM_ACS) - 1; | |
695 | ||
948d887d JB |
696 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { |
697 | unsigned long tids; | |
3e122be0 | 698 | |
948d887d JB |
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; | |
3e122be0 | 706 | |
948d887d JB |
707 | tids = ieee80211_tids_for_ac(ac); |
708 | ||
709 | indicate_tim |= | |
710 | sta->driver_buffered_tids & tids; | |
ba8c3d6f FF |
711 | indicate_tim |= |
712 | sta->txq_buffered_tids & tids; | |
d0709a65 | 713 | } |
004c872e | 714 | |
c868cb35 | 715 | done: |
65f704a5 | 716 | spin_lock_bh(&local->tim_lock); |
004c872e | 717 | |
3d5839b6 IP |
718 | if (indicate_tim == __bss_tim_get(ps->tim, id)) |
719 | goto out_unlock; | |
720 | ||
948d887d | 721 | if (indicate_tim) |
d012a605 | 722 | __bss_tim_set(ps->tim, id); |
c868cb35 | 723 | else |
d012a605 | 724 | __bss_tim_clear(ps->tim, id); |
004c872e | 725 | |
9b7a86f3 | 726 | if (local->ops->set_tim && !WARN_ON(sta->dead)) { |
c868cb35 | 727 | local->tim_in_locked_section = true; |
948d887d | 728 | drv_set_tim(local, &sta->sta, indicate_tim); |
c868cb35 JB |
729 | local->tim_in_locked_section = false; |
730 | } | |
3e122be0 | 731 | |
3d5839b6 | 732 | out_unlock: |
65f704a5 | 733 | spin_unlock_bh(&local->tim_lock); |
004c872e JB |
734 | } |
735 | ||
9b7a86f3 JB |
736 | void sta_info_recalc_tim(struct sta_info *sta) |
737 | { | |
738 | __sta_info_recalc_tim(sta, false); | |
739 | } | |
740 | ||
cd0b8d89 | 741 | static bool sta_info_buffer_expired(struct sta_info *sta, struct sk_buff *skb) |
f0706e82 | 742 | { |
e039fa4a | 743 | struct ieee80211_tx_info *info; |
f0706e82 JB |
744 | int timeout; |
745 | ||
746 | if (!skb) | |
cd0b8d89 | 747 | return false; |
f0706e82 | 748 | |
e039fa4a | 749 | info = IEEE80211_SKB_CB(skb); |
f0706e82 JB |
750 | |
751 | /* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */ | |
57c4d7b4 JB |
752 | timeout = (sta->listen_interval * |
753 | sta->sdata->vif.bss_conf.beacon_int * | |
754 | 32 / 15625) * HZ; | |
f0706e82 JB |
755 | if (timeout < STA_TX_BUFFER_EXPIRE) |
756 | timeout = STA_TX_BUFFER_EXPIRE; | |
e039fa4a | 757 | return time_after(jiffies, info->control.jiffies + timeout); |
f0706e82 JB |
758 | } |
759 | ||
760 | ||
948d887d JB |
761 | static bool sta_info_cleanup_expire_buffered_ac(struct ieee80211_local *local, |
762 | struct sta_info *sta, int ac) | |
f0706e82 JB |
763 | { |
764 | unsigned long flags; | |
765 | struct sk_buff *skb; | |
766 | ||
60750397 JB |
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 (;;) { | |
948d887d JB |
775 | spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags); |
776 | skb = skb_peek(&sta->tx_filtered[ac]); | |
60750397 | 777 | if (sta_info_buffer_expired(sta, skb)) |
948d887d | 778 | skb = __skb_dequeue(&sta->tx_filtered[ac]); |
60750397 JB |
779 | else |
780 | skb = NULL; | |
948d887d | 781 | spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags); |
60750397 JB |
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; | |
d4fa14cd | 791 | ieee80211_free_txskb(&local->hw, skb); |
60750397 JB |
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 | */ | |
f0706e82 | 800 | for (;;) { |
948d887d JB |
801 | spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags); |
802 | skb = skb_peek(&sta->ps_tx_buf[ac]); | |
57c4d7b4 | 803 | if (sta_info_buffer_expired(sta, skb)) |
948d887d | 804 | skb = __skb_dequeue(&sta->ps_tx_buf[ac]); |
836341a7 | 805 | else |
f0706e82 | 806 | skb = NULL; |
948d887d | 807 | spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags); |
f0706e82 | 808 | |
60750397 JB |
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 | */ | |
836341a7 | 814 | if (!skb) |
f0706e82 | 815 | break; |
836341a7 | 816 | |
836341a7 | 817 | local->total_ps_buffered--; |
bdcbd8e0 JB |
818 | ps_dbg(sta->sdata, "Buffered frame expired (STA %pM)\n", |
819 | sta->sta.addr); | |
d4fa14cd | 820 | ieee80211_free_txskb(&local->hw, skb); |
f0706e82 | 821 | } |
3393a608 | 822 | |
60750397 JB |
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 | */ | |
948d887d JB |
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 | ||
3f52b7e3 MP |
845 | /* This is only necessary for stations on BSS/MBSS interfaces */ |
846 | if (!sta->sdata->bss && | |
847 | !ieee80211_vif_is_mesh(&sta->sdata->vif)) | |
948d887d JB |
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; | |
f0706e82 JB |
855 | } |
856 | ||
d778207b | 857 | static int __must_check __sta_info_destroy_part1(struct sta_info *sta) |
f0706e82 | 858 | { |
34e89507 JB |
859 | struct ieee80211_local *local; |
860 | struct ieee80211_sub_if_data *sdata; | |
6d10e46b | 861 | int ret; |
f0706e82 | 862 | |
34e89507 | 863 | might_sleep(); |
f0706e82 | 864 | |
34e89507 JB |
865 | if (!sta) |
866 | return -ENOENT; | |
5bb644a0 | 867 | |
34e89507 JB |
868 | local = sta->local; |
869 | sdata = sta->sdata; | |
f0706e82 | 870 | |
83d5cc01 JB |
871 | lockdep_assert_held(&local->sta_mtx); |
872 | ||
098a6070 JB |
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 | */ | |
c2c98fde | 879 | set_sta_flag(sta, WLAN_STA_BLOCK_BA); |
c82c4a80 | 880 | ieee80211_sta_tear_down_BA_sessions(sta, AGG_STOP_DESTROY_STA); |
098a6070 | 881 | |
34e89507 | 882 | ret = sta_info_hash_del(local, sta); |
b01711be | 883 | if (WARN_ON(ret)) |
34e89507 JB |
884 | return ret; |
885 | ||
a7a6bdd0 AN |
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 | ||
794454ce | 895 | list_del_rcu(&sta->list); |
ef044763 | 896 | sta->removed = true; |
4d33960b | 897 | |
6a9d1b91 JB |
898 | drv_sta_pre_rcu_remove(local, sta->sdata, sta); |
899 | ||
a710c816 JB |
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 | ||
d778207b JB |
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; | |
0ef049dc | 911 | struct station_info *sinfo; |
d778207b JB |
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 | ||
c8782078 | 922 | /* now keys can no longer be reached */ |
6d10e46b | 923 | ieee80211_free_sta_keys(local, sta); |
34e89507 | 924 | |
9b7a86f3 JB |
925 | /* disable TIM bit - last chance to tell driver */ |
926 | __sta_info_recalc_tim(sta, true); | |
927 | ||
34e89507 JB |
928 | sta->dead = true; |
929 | ||
34e89507 JB |
930 | local->num_sta--; |
931 | local->sta_generation++; | |
932 | ||
83d5cc01 | 933 | while (sta->sta_state > IEEE80211_STA_NONE) { |
f09603a2 JB |
934 | ret = sta_info_move_state(sta, sta->sta_state - 1); |
935 | if (ret) { | |
83d5cc01 JB |
936 | WARN_ON_ONCE(1); |
937 | break; | |
938 | } | |
939 | } | |
d9a7ddb0 | 940 | |
f09603a2 | 941 | if (sta->uploaded) { |
f09603a2 JB |
942 | ret = drv_sta_state(local, sdata, sta, IEEE80211_STA_NONE, |
943 | IEEE80211_STA_NOTEXIST); | |
944 | WARN_ON_ONCE(ret != 0); | |
945 | } | |
34e89507 | 946 | |
bdcbd8e0 JB |
947 | sta_dbg(sdata, "Removed STA %pM\n", sta->sta.addr); |
948 | ||
0ef049dc AB |
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); | |
ec15e68b | 954 | |
34e89507 JB |
955 | rate_control_remove_sta_debugfs(sta); |
956 | ieee80211_sta_debugfs_remove(sta); | |
957 | ||
d34ba216 | 958 | cleanup_single_sta(sta); |
d778207b JB |
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); | |
34e89507 JB |
971 | |
972 | return 0; | |
4d6141c3 JS |
973 | } |
974 | ||
34e89507 | 975 | int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, const u8 *addr) |
4d6141c3 | 976 | { |
34e89507 JB |
977 | struct sta_info *sta; |
978 | int ret; | |
4d6141c3 | 979 | |
34e89507 | 980 | mutex_lock(&sdata->local->sta_mtx); |
7852e361 | 981 | sta = sta_info_get(sdata, addr); |
34e89507 JB |
982 | ret = __sta_info_destroy(sta); |
983 | mutex_unlock(&sdata->local->sta_mtx); | |
4d6141c3 JS |
984 | |
985 | return ret; | |
986 | } | |
987 | ||
34e89507 JB |
988 | int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata, |
989 | const u8 *addr) | |
e9f207f0 | 990 | { |
34e89507 JB |
991 | struct sta_info *sta; |
992 | int ret; | |
e9f207f0 | 993 | |
34e89507 | 994 | mutex_lock(&sdata->local->sta_mtx); |
7852e361 | 995 | sta = sta_info_get_bss(sdata, addr); |
34e89507 JB |
996 | ret = __sta_info_destroy(sta); |
997 | mutex_unlock(&sdata->local->sta_mtx); | |
d0709a65 | 998 | |
34e89507 JB |
999 | return ret; |
1000 | } | |
e9f207f0 | 1001 | |
34e89507 JB |
1002 | static void sta_info_cleanup(unsigned long data) |
1003 | { | |
1004 | struct ieee80211_local *local = (struct ieee80211_local *) data; | |
1005 | struct sta_info *sta; | |
3393a608 | 1006 | bool timer_needed = false; |
34e89507 JB |
1007 | |
1008 | rcu_read_lock(); | |
1009 | list_for_each_entry_rcu(sta, &local->sta_list, list) | |
3393a608 JO |
1010 | if (sta_info_cleanup_expire_buffered(local, sta)) |
1011 | timer_needed = true; | |
34e89507 | 1012 | rcu_read_unlock(); |
e9f207f0 | 1013 | |
34e89507 JB |
1014 | if (local->quiescing) |
1015 | return; | |
d0709a65 | 1016 | |
3393a608 JO |
1017 | if (!timer_needed) |
1018 | return; | |
1019 | ||
26d59535 JB |
1020 | mod_timer(&local->sta_cleanup, |
1021 | round_jiffies(jiffies + STA_INFO_CLEANUP_INTERVAL)); | |
e9f207f0 | 1022 | } |
e9f207f0 | 1023 | |
7bedd0cf | 1024 | u32 sta_addr_hash(const void *key, u32 length, u32 seed) |
f0706e82 | 1025 | { |
7bedd0cf JB |
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 | ||
4d33960b | 1037 | spin_lock_init(&local->tim_lock); |
34e89507 | 1038 | mutex_init(&local->sta_mtx); |
f0706e82 | 1039 | INIT_LIST_HEAD(&local->sta_list); |
f0706e82 | 1040 | |
b24b8a24 PE |
1041 | setup_timer(&local->sta_cleanup, sta_info_cleanup, |
1042 | (unsigned long)local); | |
7bedd0cf | 1043 | return 0; |
f0706e82 JB |
1044 | } |
1045 | ||
1046 | void sta_info_stop(struct ieee80211_local *local) | |
1047 | { | |
a56f992c | 1048 | del_timer_sync(&local->sta_cleanup); |
7bedd0cf | 1049 | rhashtable_destroy(&local->sta_hash); |
f0706e82 JB |
1050 | } |
1051 | ||
051007d9 | 1052 | |
e716251d | 1053 | int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans) |
f0706e82 | 1054 | { |
b998e8bb | 1055 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 1056 | struct sta_info *sta, *tmp; |
d778207b | 1057 | LIST_HEAD(free_list); |
44213b5e | 1058 | int ret = 0; |
f0706e82 | 1059 | |
d0709a65 | 1060 | might_sleep(); |
be8755e1 | 1061 | |
e716251d JB |
1062 | WARN_ON(vlans && sdata->vif.type != NL80211_IFTYPE_AP); |
1063 | WARN_ON(vlans && !sdata->bss); | |
1064 | ||
34e89507 | 1065 | mutex_lock(&local->sta_mtx); |
d0709a65 | 1066 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { |
e716251d JB |
1067 | if (sdata == sta->sdata || |
1068 | (vlans && sdata->bss == sta->sdata->bss)) { | |
d778207b JB |
1069 | if (!WARN_ON(__sta_info_destroy_part1(sta))) |
1070 | list_add(&sta->free_list, &free_list); | |
34316837 JB |
1071 | ret++; |
1072 | } | |
be8755e1 | 1073 | } |
d778207b JB |
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 | } | |
34e89507 | 1080 | mutex_unlock(&local->sta_mtx); |
44213b5e | 1081 | |
051007d9 JB |
1082 | return ret; |
1083 | } | |
1084 | ||
24723d1b JB |
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; | |
24723d1b | 1090 | |
34e89507 | 1091 | mutex_lock(&local->sta_mtx); |
e46a2cf9 MSS |
1092 | |
1093 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { | |
ec2b774e ML |
1094 | if (sdata != sta->sdata) |
1095 | continue; | |
1096 | ||
e5a9f8d0 | 1097 | if (time_after(jiffies, sta->rx_stats.last_rx + exp_time)) { |
eea57d42 MSS |
1098 | sta_dbg(sta->sdata, "expiring inactive STA %pM\n", |
1099 | sta->sta.addr); | |
3f52b7e3 MP |
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 | ||
34e89507 | 1105 | WARN_ON(__sta_info_destroy(sta)); |
24723d1b | 1106 | } |
e46a2cf9 MSS |
1107 | } |
1108 | ||
34e89507 | 1109 | mutex_unlock(&local->sta_mtx); |
24723d1b | 1110 | } |
17741cdc | 1111 | |
686b9cb9 | 1112 | struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw, |
7bedd0cf JB |
1113 | const u8 *addr, |
1114 | const u8 *localaddr) | |
17741cdc | 1115 | { |
7bedd0cf JB |
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); | |
17741cdc | 1122 | |
686b9cb9 BG |
1123 | /* |
1124 | * Just return a random station if localaddr is NULL | |
1125 | * ... first in list. | |
1126 | */ | |
7bedd0cf | 1127 | for_each_sta_info(local, tbl, addr, sta, tmp) { |
686b9cb9 | 1128 | if (localaddr && |
b203ca39 | 1129 | !ether_addr_equal(sta->sdata->vif.addr, localaddr)) |
686b9cb9 | 1130 | continue; |
f7c65594 JB |
1131 | if (!sta->uploaded) |
1132 | return NULL; | |
abe60632 | 1133 | return &sta->sta; |
f7c65594 JB |
1134 | } |
1135 | ||
abe60632 | 1136 | return NULL; |
17741cdc | 1137 | } |
686b9cb9 | 1138 | EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_ifaddr); |
5ed176e1 JB |
1139 | |
1140 | struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif, | |
1141 | const u8 *addr) | |
1142 | { | |
f7c65594 | 1143 | struct sta_info *sta; |
5ed176e1 JB |
1144 | |
1145 | if (!vif) | |
1146 | return NULL; | |
1147 | ||
f7c65594 JB |
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; | |
5ed176e1 | 1154 | |
f7c65594 | 1155 | return &sta->sta; |
5ed176e1 | 1156 | } |
17741cdc | 1157 | EXPORT_SYMBOL(ieee80211_find_sta); |
af818581 | 1158 | |
e3685e03 JB |
1159 | /* powersave support code */ |
1160 | void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta) | |
50a9432d | 1161 | { |
608383bf | 1162 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
e3685e03 JB |
1163 | struct ieee80211_local *local = sdata->local; |
1164 | struct sk_buff_head pending; | |
ba8c3d6f | 1165 | int filtered = 0, buffered = 0, ac, i; |
e3685e03 | 1166 | unsigned long flags; |
d012a605 MP |
1167 | struct ps_data *ps; |
1168 | ||
3918edb0 FF |
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) | |
d012a605 | 1174 | ps = &sdata->bss->ps; |
3f52b7e3 MP |
1175 | else if (ieee80211_vif_is_mesh(&sdata->vif)) |
1176 | ps = &sdata->u.mesh.ps; | |
d012a605 MP |
1177 | else |
1178 | return; | |
50a9432d | 1179 | |
c2c98fde | 1180 | clear_sta_flag(sta, WLAN_STA_SP); |
47086fc5 | 1181 | |
5a306f58 | 1182 | BUILD_BUG_ON(BITS_TO_LONGS(IEEE80211_NUM_TIDS) > 1); |
948d887d | 1183 | sta->driver_buffered_tids = 0; |
ba8c3d6f | 1184 | sta->txq_buffered_tids = 0; |
af818581 | 1185 | |
30686bf7 | 1186 | if (!ieee80211_hw_check(&local->hw, AP_LINK_PS)) |
d057e5a3 | 1187 | drv_sta_notify(local, sdata, STA_NOTIFY_AWAKE, &sta->sta); |
af818581 | 1188 | |
ba8c3d6f FF |
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 | ||
948d887d | 1200 | skb_queue_head_init(&pending); |
af818581 | 1201 | |
1d147bfa EG |
1202 | /* sync with ieee80211_tx_h_unicast_ps_buf */ |
1203 | spin_lock(&sta->ps_lock); | |
af818581 | 1204 | /* Send all buffered frames to the station */ |
948d887d JB |
1205 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { |
1206 | int count = skb_queue_len(&pending), tmp; | |
1207 | ||
987c285c | 1208 | spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags); |
948d887d | 1209 | skb_queue_splice_tail_init(&sta->tx_filtered[ac], &pending); |
987c285c | 1210 | spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags); |
948d887d JB |
1211 | tmp = skb_queue_len(&pending); |
1212 | filtered += tmp - count; | |
1213 | count = tmp; | |
1214 | ||
987c285c | 1215 | spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags); |
948d887d | 1216 | skb_queue_splice_tail_init(&sta->ps_tx_buf[ac], &pending); |
987c285c | 1217 | spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags); |
948d887d JB |
1218 | tmp = skb_queue_len(&pending); |
1219 | buffered += tmp - count; | |
1220 | } | |
1221 | ||
e3685e03 | 1222 | ieee80211_add_pending_skbs(local, &pending); |
5ac2e350 JB |
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); | |
1d147bfa | 1232 | spin_unlock(&sta->ps_lock); |
948d887d | 1233 | |
e3685e03 JB |
1234 | atomic_dec(&ps->num_sta_ps); |
1235 | ||
687da132 | 1236 | /* This station just woke up and isn't aware of our SMPS state */ |
062f1d6d CYY |
1237 | if (!ieee80211_vif_is_mesh(&sdata->vif) && |
1238 | !ieee80211_smps_is_restrictive(sta->known_smps_mode, | |
687da132 EG |
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 | ||
af818581 JB |
1250 | local->total_ps_buffered -= buffered; |
1251 | ||
c868cb35 JB |
1252 | sta_info_recalc_tim(sta); |
1253 | ||
bdcbd8e0 JB |
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); | |
17c18bf8 JB |
1257 | |
1258 | ieee80211_check_fast_xmit(sta); | |
af818581 JB |
1259 | } |
1260 | ||
0ead2510 | 1261 | static void ieee80211_send_null_response(struct sta_info *sta, int tid, |
b77cf4f8 | 1262 | enum ieee80211_frame_release_type reason, |
0ead2510 | 1263 | bool call_driver, bool more_data) |
af818581 | 1264 | { |
0ead2510 | 1265 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
af818581 | 1266 | struct ieee80211_local *local = sdata->local; |
ce662b44 | 1267 | struct ieee80211_qos_hdr *nullfunc; |
af818581 | 1268 | struct sk_buff *skb; |
ce662b44 JB |
1269 | int size = sizeof(*nullfunc); |
1270 | __le16 fc; | |
a74a8c84 | 1271 | bool qos = sta->sta.wme; |
ce662b44 | 1272 | struct ieee80211_tx_info *info; |
55de908a | 1273 | struct ieee80211_chanctx_conf *chanctx_conf; |
af818581 | 1274 | |
ce662b44 JB |
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); | |
af818581 | 1284 | } |
af818581 | 1285 | |
ce662b44 JB |
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); | |
864a6040 | 1298 | nullfunc->seq_ctrl = 0; |
ce662b44 | 1299 | |
59b66255 JB |
1300 | skb->priority = tid; |
1301 | skb_set_queue_mapping(skb, ieee802_1d_to_ac[tid]); | |
ce662b44 | 1302 | if (qos) { |
ce662b44 JB |
1303 | nullfunc->qos_ctrl = cpu_to_le16(tid); |
1304 | ||
0ead2510 | 1305 | if (reason == IEEE80211_FRAME_RELEASE_UAPSD) { |
ce662b44 JB |
1306 | nullfunc->qos_ctrl |= |
1307 | cpu_to_le16(IEEE80211_QOS_CTL_EOSP); | |
0ead2510 EG |
1308 | if (more_data) |
1309 | nullfunc->frame_control |= | |
1310 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
1311 | } | |
ce662b44 JB |
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 | |
deeaee19 JB |
1319 | * exchange. Also set EOSP to indicate this packet |
1320 | * ends the poll/service period. | |
ce662b44 | 1321 | */ |
02f2f1a9 | 1322 | info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER | |
deeaee19 JB |
1323 | IEEE80211_TX_STATUS_EOSP | |
1324 | IEEE80211_TX_CTL_REQ_TX_STATUS; | |
ce662b44 | 1325 | |
6b127c71 SM |
1326 | info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE; |
1327 | ||
b77cf4f8 JB |
1328 | if (call_driver) |
1329 | drv_allow_buffered_frames(local, sta, BIT(tid), 1, | |
1330 | reason, false); | |
40b96408 | 1331 | |
89afe614 JB |
1332 | skb->dev = sdata->dev; |
1333 | ||
55de908a JB |
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 | ||
73c4e195 | 1342 | info->band = chanctx_conf->def.chan->band; |
7c10770f | 1343 | ieee80211_xmit(sdata, sta, skb); |
55de908a | 1344 | rcu_read_unlock(); |
ce662b44 JB |
1345 | } |
1346 | ||
0a1cb809 JB |
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 | ||
0ead2510 EG |
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 | ||
47086fc5 | 1391 | static void |
0ead2510 EG |
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) | |
af818581 JB |
1396 | { |
1397 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
1398 | struct ieee80211_local *local = sdata->local; | |
948d887d | 1399 | int ac; |
948d887d | 1400 | |
f9f760b4 | 1401 | /* Get response frame(s) and more data bit for the last one. */ |
948d887d | 1402 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { |
4049e09a JB |
1403 | unsigned long tids; |
1404 | ||
47086fc5 | 1405 | if (ignored_acs & BIT(ac)) |
948d887d JB |
1406 | continue; |
1407 | ||
4049e09a JB |
1408 | tids = ieee80211_tids_for_ac(ac); |
1409 | ||
f9f760b4 JB |
1410 | /* if we already have frames from software, then we can't also |
1411 | * release from hardware queues | |
1412 | */ | |
0ead2510 EG |
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; | |
ba8c3d6f | 1417 | } |
948d887d | 1418 | |
0ead2510 | 1419 | if (!*driver_release_tids) { |
f9f760b4 JB |
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--; | |
0ead2510 | 1433 | __skb_queue_tail(frames, skb); |
f9f760b4 | 1434 | } |
4049e09a | 1435 | } |
948d887d | 1436 | |
0ead2510 EG |
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. | |
f9f760b4 | 1440 | */ |
948d887d | 1441 | if (!skb_queue_empty(&sta->tx_filtered[ac]) || |
0ead2510 | 1442 | !skb_queue_empty(&sta->ps_tx_buf[ac])) |
948d887d | 1443 | break; |
af818581 | 1444 | } |
0ead2510 EG |
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 | ||
1a57081a | 1468 | if (driver_release_tids && reason == IEEE80211_FRAME_RELEASE_PSPOLL) |
0ead2510 EG |
1469 | driver_release_tids = |
1470 | BIT(find_highest_prio_tid(driver_release_tids)); | |
af818581 | 1471 | |
f9f760b4 | 1472 | if (skb_queue_empty(&frames) && !driver_release_tids) { |
ce662b44 | 1473 | int tid; |
af818581 JB |
1474 | |
1475 | /* | |
ce662b44 JB |
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. | |
af818581 | 1488 | */ |
af818581 | 1489 | |
ce662b44 JB |
1490 | /* This will evaluate to 1, 3, 5 or 7. */ |
1491 | tid = 7 - ((ffs(~ignored_acs) - 1) << 1); | |
af818581 | 1492 | |
0ead2510 | 1493 | ieee80211_send_null_response(sta, tid, reason, true, false); |
f9f760b4 | 1494 | } else if (!driver_release_tids) { |
47086fc5 JB |
1495 | struct sk_buff_head pending; |
1496 | struct sk_buff *skb; | |
40b96408 JB |
1497 | int num = 0; |
1498 | u16 tids = 0; | |
b77cf4f8 | 1499 | bool need_null = false; |
af818581 | 1500 | |
47086fc5 | 1501 | skb_queue_head_init(&pending); |
af818581 | 1502 | |
47086fc5 JB |
1503 | while ((skb = __skb_dequeue(&frames))) { |
1504 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1505 | struct ieee80211_hdr *hdr = (void *) skb->data; | |
40b96408 JB |
1506 | u8 *qoshdr = NULL; |
1507 | ||
1508 | num++; | |
af818581 | 1509 | |
47086fc5 JB |
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 | */ | |
6b127c71 SM |
1515 | info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER; |
1516 | info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE; | |
47086fc5 JB |
1517 | |
1518 | /* | |
1519 | * Use MoreData flag to indicate whether there are | |
1520 | * more buffered frames for this STA | |
1521 | */ | |
24b9c373 | 1522 | if (more_data || !skb_queue_empty(&frames)) |
47086fc5 JB |
1523 | hdr->frame_control |= |
1524 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
24b9c373 JD |
1525 | else |
1526 | hdr->frame_control &= | |
1527 | cpu_to_le16(~IEEE80211_FCTL_MOREDATA); | |
47086fc5 | 1528 | |
40b96408 JB |
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 | ||
b77cf4f8 | 1533 | tids |= BIT(skb->priority); |
52a3f20c | 1534 | |
b77cf4f8 JB |
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 */ | |
52a3f20c MP |
1543 | info->flags |= IEEE80211_TX_STATUS_EOSP | |
1544 | IEEE80211_TX_CTL_REQ_TX_STATUS; | |
b77cf4f8 | 1545 | break; |
52a3f20c | 1546 | } |
deeaee19 | 1547 | |
b77cf4f8 JB |
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; | |
40b96408 | 1566 | |
b77cf4f8 JB |
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; | |
47086fc5 | 1584 | } |
af818581 | 1585 | |
40b96408 JB |
1586 | drv_allow_buffered_frames(local, sta, tids, num, |
1587 | reason, more_data); | |
1588 | ||
47086fc5 | 1589 | ieee80211_add_pending_skbs(local, &pending); |
af818581 | 1590 | |
b77cf4f8 JB |
1591 | if (need_null) |
1592 | ieee80211_send_null_response( | |
0ead2510 EG |
1593 | sta, find_highest_prio_tid(tids), |
1594 | reason, false, false); | |
b77cf4f8 | 1595 | |
c868cb35 | 1596 | sta_info_recalc_tim(sta); |
af818581 | 1597 | } else { |
ba8c3d6f FF |
1598 | unsigned long tids = sta->txq_buffered_tids & driver_release_tids; |
1599 | int tid; | |
1600 | ||
af818581 | 1601 | /* |
4049e09a JB |
1602 | * We need to release a frame that is buffered somewhere in the |
1603 | * driver ... it'll have to handle that. | |
f9f760b4 JB |
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. | |
4049e09a JB |
1610 | */ |
1611 | drv_release_buffered_frames(local, sta, driver_release_tids, | |
47086fc5 | 1612 | n_frames, reason, more_data); |
4049e09a JB |
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 | |
f9f760b4 | 1617 | * that the TID(s) became empty before returning here from the |
4049e09a | 1618 | * release function. |
f9f760b4 | 1619 | * Either way, however, when the driver tells us that the TID(s) |
ba8c3d6f FF |
1620 | * became empty or we find that a txq became empty, we'll do the |
1621 | * TIM recalculation. | |
af818581 | 1622 | */ |
ba8c3d6f FF |
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 | } | |
af818581 JB |
1636 | } |
1637 | } | |
1638 | ||
47086fc5 JB |
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 | ||
47086fc5 JB |
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? */ | |
13a8098a | 1681 | n_frames = 128; |
47086fc5 JB |
1682 | break; |
1683 | } | |
1684 | ||
1685 | ieee80211_sta_ps_deliver_response(sta, n_frames, ~delivery_enabled, | |
1686 | IEEE80211_FRAME_RELEASE_UAPSD); | |
1687 | } | |
1688 | ||
af818581 JB |
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 | ||
b5878a2d JB |
1694 | trace_api_sta_block_awake(sta->local, pubsta, block); |
1695 | ||
5ac2e350 | 1696 | if (block) { |
c2c98fde | 1697 | set_sta_flag(sta, WLAN_STA_PS_DRIVER); |
17c18bf8 | 1698 | ieee80211_clear_fast_xmit(sta); |
5ac2e350 JB |
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); | |
17c18bf8 | 1716 | ieee80211_check_fast_xmit(sta); |
5ac2e350 | 1717 | } |
af818581 JB |
1718 | } |
1719 | EXPORT_SYMBOL(ieee80211_sta_block_awake); | |
dcf55fb5 | 1720 | |
e943789e | 1721 | void ieee80211_sta_eosp(struct ieee80211_sta *pubsta) |
37fbd908 JB |
1722 | { |
1723 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
1724 | struct ieee80211_local *local = sta->local; | |
37fbd908 JB |
1725 | |
1726 | trace_api_eosp(local, pubsta); | |
1727 | ||
e943789e | 1728 | clear_sta_flag(sta, WLAN_STA_SP); |
37fbd908 | 1729 | } |
e943789e | 1730 | EXPORT_SYMBOL(ieee80211_sta_eosp); |
37fbd908 | 1731 | |
0ead2510 EG |
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 | ||
042ec453 JB |
1748 | void ieee80211_sta_set_buffered(struct ieee80211_sta *pubsta, |
1749 | u8 tid, bool buffered) | |
dcf55fb5 FF |
1750 | { |
1751 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
1752 | ||
5a306f58 | 1753 | if (WARN_ON(tid >= IEEE80211_NUM_TIDS)) |
042ec453 JB |
1754 | return; |
1755 | ||
1b000789 JB |
1756 | trace_api_sta_set_buffered(sta->local, pubsta, tid, buffered); |
1757 | ||
948d887d JB |
1758 | if (buffered) |
1759 | set_bit(tid, &sta->driver_buffered_tids); | |
1760 | else | |
1761 | clear_bit(tid, &sta->driver_buffered_tids); | |
1762 | ||
c868cb35 | 1763 | sta_info_recalc_tim(sta); |
dcf55fb5 | 1764 | } |
042ec453 | 1765 | EXPORT_SYMBOL(ieee80211_sta_set_buffered); |
d9a7ddb0 | 1766 | |
83d5cc01 JB |
1767 | int sta_info_move_state(struct sta_info *sta, |
1768 | enum ieee80211_sta_state new_state) | |
d9a7ddb0 | 1769 | { |
8bf11d8d | 1770 | might_sleep(); |
d9a7ddb0 JB |
1771 | |
1772 | if (sta->sta_state == new_state) | |
1773 | return 0; | |
1774 | ||
f09603a2 JB |
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 | ||
bdcbd8e0 JB |
1801 | sta_dbg(sta->sdata, "moving STA %pM to state %d\n", |
1802 | sta->sta.addr, new_state); | |
f09603a2 JB |
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 | ||
d9a7ddb0 JB |
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); | |
d9a7ddb0 JB |
1821 | break; |
1822 | case IEEE80211_STA_AUTH: | |
a7201a6c | 1823 | if (sta->sta_state == IEEE80211_STA_NONE) { |
d9a7ddb0 | 1824 | set_bit(WLAN_STA_AUTH, &sta->_flags); |
a7201a6c | 1825 | } else if (sta->sta_state == IEEE80211_STA_ASSOC) { |
d9a7ddb0 | 1826 | clear_bit(WLAN_STA_ASSOC, &sta->_flags); |
a7201a6c IP |
1827 | ieee80211_recalc_min_chandef(sta->sdata); |
1828 | } | |
d9a7ddb0 JB |
1829 | break; |
1830 | case IEEE80211_STA_ASSOC: | |
29623892 | 1831 | if (sta->sta_state == IEEE80211_STA_AUTH) { |
d9a7ddb0 | 1832 | set_bit(WLAN_STA_ASSOC, &sta->_flags); |
a7201a6c | 1833 | ieee80211_recalc_min_chandef(sta->sdata); |
29623892 | 1834 | } else if (sta->sta_state == IEEE80211_STA_AUTHORIZED) { |
7e3ed02c FF |
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); | |
d9a7ddb0 | 1839 | clear_bit(WLAN_STA_AUTHORIZED, &sta->_flags); |
17c18bf8 | 1840 | ieee80211_clear_fast_xmit(sta); |
f09603a2 | 1841 | } |
d9a7ddb0 JB |
1842 | break; |
1843 | case IEEE80211_STA_AUTHORIZED: | |
29623892 | 1844 | if (sta->sta_state == IEEE80211_STA_ASSOC) { |
7e3ed02c FF |
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); | |
d9a7ddb0 | 1849 | set_bit(WLAN_STA_AUTHORIZED, &sta->_flags); |
17c18bf8 | 1850 | ieee80211_check_fast_xmit(sta); |
f09603a2 | 1851 | } |
d9a7ddb0 JB |
1852 | break; |
1853 | default: | |
f09603a2 | 1854 | break; |
d9a7ddb0 JB |
1855 | } |
1856 | ||
d9a7ddb0 JB |
1857 | sta->sta_state = new_state; |
1858 | ||
1859 | return 0; | |
1860 | } | |
687da132 EG |
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 | } | |
b7ffbd7e | 1896 | |
fbd6ff5c JB |
1897 | static void sta_set_rate_info_rx(struct sta_info *sta, struct rate_info *rinfo) |
1898 | { | |
1899 | rinfo->flags = 0; | |
1900 | ||
e5a9f8d0 | 1901 | if (sta->rx_stats.last_rate_flag & RX_FLAG_HT) { |
fbd6ff5c | 1902 | rinfo->flags |= RATE_INFO_FLAGS_MCS; |
e5a9f8d0 JB |
1903 | rinfo->mcs = sta->rx_stats.last_rate_idx; |
1904 | } else if (sta->rx_stats.last_rate_flag & RX_FLAG_VHT) { | |
fbd6ff5c | 1905 | rinfo->flags |= RATE_INFO_FLAGS_VHT_MCS; |
e5a9f8d0 JB |
1906 | rinfo->nss = sta->rx_stats.last_rate_vht_nss; |
1907 | rinfo->mcs = sta->rx_stats.last_rate_idx; | |
fbd6ff5c JB |
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)]; | |
e5a9f8d0 | 1915 | brate = sband->bitrates[sta->rx_stats.last_rate_idx].bitrate; |
fbd6ff5c JB |
1916 | rinfo->legacy = DIV_ROUND_UP(brate, 1 << shift); |
1917 | } | |
1918 | ||
e5a9f8d0 | 1919 | if (sta->rx_stats.last_rate_flag & RX_FLAG_SHORT_GI) |
fbd6ff5c JB |
1920 | rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI; |
1921 | ||
e5a9f8d0 | 1922 | if (sta->rx_stats.last_rate_flag & RX_FLAG_5MHZ) |
fbd6ff5c | 1923 | rinfo->bw = RATE_INFO_BW_5; |
e5a9f8d0 | 1924 | else if (sta->rx_stats.last_rate_flag & RX_FLAG_10MHZ) |
fbd6ff5c | 1925 | rinfo->bw = RATE_INFO_BW_10; |
e5a9f8d0 | 1926 | else if (sta->rx_stats.last_rate_flag & RX_FLAG_40MHZ) |
fbd6ff5c | 1927 | rinfo->bw = RATE_INFO_BW_40; |
e5a9f8d0 | 1928 | else if (sta->rx_stats.last_rate_vht_flag & RX_VHT_FLAG_80MHZ) |
fbd6ff5c | 1929 | rinfo->bw = RATE_INFO_BW_80; |
e5a9f8d0 | 1930 | else if (sta->rx_stats.last_rate_vht_flag & RX_VHT_FLAG_160MHZ) |
fbd6ff5c JB |
1931 | rinfo->bw = RATE_INFO_BW_160; |
1932 | else | |
1933 | rinfo->bw = RATE_INFO_BW_20; | |
1934 | } | |
1935 | ||
b7ffbd7e JB |
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; | |
9a244409 | 1940 | struct rate_control_ref *ref = NULL; |
b7ffbd7e JB |
1941 | u32 thr = 0; |
1942 | int i, ac; | |
1943 | ||
9a244409 JL |
1944 | if (test_sta_flag(sta, WLAN_STA_RATE_CONTROL)) |
1945 | ref = local->rate_ctrl; | |
1946 | ||
b7ffbd7e JB |
1947 | sinfo->generation = sdata->local->sta_generation; |
1948 | ||
225b8189 JB |
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 | ||
2b9a7e1b JB |
1956 | drv_sta_statistics(local, sdata, &sta->sta, sinfo); |
1957 | ||
319090bf JB |
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) | | |
976bd9ef JB |
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 | } | |
b7ffbd7e | 1968 | |
84b00607 | 1969 | sinfo->connected_time = ktime_get_seconds() - sta->last_connected; |
e5a9f8d0 JB |
1970 | sinfo->inactive_time = |
1971 | jiffies_to_msecs(jiffies - sta->rx_stats.last_rx); | |
2b9a7e1b | 1972 | |
319090bf JB |
1973 | if (!(sinfo->filled & (BIT(NL80211_STA_INFO_TX_BYTES64) | |
1974 | BIT(NL80211_STA_INFO_TX_BYTES)))) { | |
2b9a7e1b JB |
1975 | sinfo->tx_bytes = 0; |
1976 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) | |
e5a9f8d0 | 1977 | sinfo->tx_bytes += sta->tx_stats.bytes[ac]; |
319090bf | 1978 | sinfo->filled |= BIT(NL80211_STA_INFO_TX_BYTES64); |
2b9a7e1b JB |
1979 | } |
1980 | ||
319090bf | 1981 | if (!(sinfo->filled & BIT(NL80211_STA_INFO_TX_PACKETS))) { |
2b9a7e1b JB |
1982 | sinfo->tx_packets = 0; |
1983 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) | |
e5a9f8d0 | 1984 | sinfo->tx_packets += sta->tx_stats.packets[ac]; |
319090bf | 1985 | sinfo->filled |= BIT(NL80211_STA_INFO_TX_PACKETS); |
2b9a7e1b JB |
1986 | } |
1987 | ||
319090bf JB |
1988 | if (!(sinfo->filled & (BIT(NL80211_STA_INFO_RX_BYTES64) | |
1989 | BIT(NL80211_STA_INFO_RX_BYTES)))) { | |
e5a9f8d0 | 1990 | sinfo->rx_bytes = sta->rx_stats.bytes; |
319090bf | 1991 | sinfo->filled |= BIT(NL80211_STA_INFO_RX_BYTES64); |
2b9a7e1b JB |
1992 | } |
1993 | ||
319090bf | 1994 | if (!(sinfo->filled & BIT(NL80211_STA_INFO_RX_PACKETS))) { |
e5a9f8d0 | 1995 | sinfo->rx_packets = sta->rx_stats.packets; |
319090bf | 1996 | sinfo->filled |= BIT(NL80211_STA_INFO_RX_PACKETS); |
2b9a7e1b JB |
1997 | } |
1998 | ||
319090bf | 1999 | if (!(sinfo->filled & BIT(NL80211_STA_INFO_TX_RETRIES))) { |
e5a9f8d0 | 2000 | sinfo->tx_retries = sta->status_stats.retry_count; |
319090bf | 2001 | sinfo->filled |= BIT(NL80211_STA_INFO_TX_RETRIES); |
2b9a7e1b JB |
2002 | } |
2003 | ||
319090bf | 2004 | if (!(sinfo->filled & BIT(NL80211_STA_INFO_TX_FAILED))) { |
e5a9f8d0 | 2005 | sinfo->tx_failed = sta->status_stats.retry_failed; |
319090bf | 2006 | sinfo->filled |= BIT(NL80211_STA_INFO_TX_FAILED); |
b7ffbd7e | 2007 | } |
2b9a7e1b | 2008 | |
e5a9f8d0 | 2009 | sinfo->rx_dropped_misc = sta->rx_stats.dropped; |
b7ffbd7e | 2010 | |
225b8189 JB |
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 | ||
30686bf7 JB |
2018 | if (ieee80211_hw_check(&sta->local->hw, SIGNAL_DBM) || |
2019 | ieee80211_hw_check(&sta->local->hw, SIGNAL_UNSPEC)) { | |
319090bf | 2020 | if (!(sinfo->filled & BIT(NL80211_STA_INFO_SIGNAL))) { |
e5a9f8d0 | 2021 | sinfo->signal = (s8)sta->rx_stats.last_signal; |
319090bf | 2022 | sinfo->filled |= BIT(NL80211_STA_INFO_SIGNAL); |
2b9a7e1b JB |
2023 | } |
2024 | ||
319090bf | 2025 | if (!(sinfo->filled & BIT(NL80211_STA_INFO_SIGNAL_AVG))) { |
40d9a38a | 2026 | sinfo->signal_avg = |
e5a9f8d0 | 2027 | -ewma_signal_read(&sta->rx_stats.avg_signal); |
319090bf | 2028 | sinfo->filled |= BIT(NL80211_STA_INFO_SIGNAL_AVG); |
2b9a7e1b | 2029 | } |
b7ffbd7e | 2030 | } |
2b9a7e1b | 2031 | |
e5a9f8d0 | 2032 | if (sta->rx_stats.chains && |
319090bf JB |
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); | |
b7ffbd7e | 2037 | |
e5a9f8d0 | 2038 | sinfo->chains = sta->rx_stats.chains; |
b7ffbd7e | 2039 | for (i = 0; i < ARRAY_SIZE(sinfo->chain_signal); i++) { |
e5a9f8d0 JB |
2040 | sinfo->chain_signal[i] = |
2041 | sta->rx_stats.chain_signal_last[i]; | |
b7ffbd7e | 2042 | sinfo->chain_signal_avg[i] = |
e5a9f8d0 | 2043 | -ewma_signal_read(&sta->rx_stats.chain_signal_avg[i]); |
b7ffbd7e JB |
2044 | } |
2045 | } | |
2046 | ||
319090bf | 2047 | if (!(sinfo->filled & BIT(NL80211_STA_INFO_TX_BITRATE))) { |
e5a9f8d0 JB |
2048 | sta_set_rate_info_tx(sta, &sta->tx_stats.last_rate, |
2049 | &sinfo->txrate); | |
319090bf | 2050 | sinfo->filled |= BIT(NL80211_STA_INFO_TX_BITRATE); |
2b9a7e1b JB |
2051 | } |
2052 | ||
319090bf | 2053 | if (!(sinfo->filled & BIT(NL80211_STA_INFO_RX_BITRATE))) { |
2b9a7e1b | 2054 | sta_set_rate_info_rx(sta, &sinfo->rxrate); |
319090bf | 2055 | sinfo->filled |= BIT(NL80211_STA_INFO_RX_BITRATE); |
2b9a7e1b | 2056 | } |
b7ffbd7e | 2057 | |
79c892b8 JB |
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); | |
e5a9f8d0 | 2064 | tidstats->rx_msdu = sta->rx_stats.msdu[i]; |
79c892b8 JB |
2065 | } |
2066 | ||
2067 | if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU))) { | |
2068 | tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU); | |
e5a9f8d0 | 2069 | tidstats->tx_msdu = sta->tx_stats.msdu[i]; |
79c892b8 JB |
2070 | } |
2071 | ||
2072 | if (!(tidstats->filled & | |
2073 | BIT(NL80211_TID_STATS_TX_MSDU_RETRIES)) && | |
30686bf7 | 2074 | ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { |
79c892b8 JB |
2075 | tidstats->filled |= |
2076 | BIT(NL80211_TID_STATS_TX_MSDU_RETRIES); | |
e5a9f8d0 JB |
2077 | tidstats->tx_msdu_retries = |
2078 | sta->status_stats.msdu_retries[i]; | |
79c892b8 JB |
2079 | } |
2080 | ||
2081 | if (!(tidstats->filled & | |
2082 | BIT(NL80211_TID_STATS_TX_MSDU_FAILED)) && | |
30686bf7 | 2083 | ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { |
79c892b8 JB |
2084 | tidstats->filled |= |
2085 | BIT(NL80211_TID_STATS_TX_MSDU_FAILED); | |
e5a9f8d0 JB |
2086 | tidstats->tx_msdu_failed = |
2087 | sta->status_stats.msdu_failed[i]; | |
79c892b8 JB |
2088 | } |
2089 | } | |
2090 | ||
b7ffbd7e JB |
2091 | if (ieee80211_vif_is_mesh(&sdata->vif)) { |
2092 | #ifdef CONFIG_MAC80211_MESH | |
319090bf JB |
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); | |
b7ffbd7e | 2099 | |
433f5bc1 JB |
2100 | sinfo->llid = sta->mesh->llid; |
2101 | sinfo->plid = sta->mesh->plid; | |
2102 | sinfo->plink_state = sta->mesh->plink_state; | |
b7ffbd7e | 2103 | if (test_sta_flag(sta, WLAN_STA_TOFFSET_KNOWN)) { |
319090bf | 2104 | sinfo->filled |= BIT(NL80211_STA_INFO_T_OFFSET); |
433f5bc1 | 2105 | sinfo->t_offset = sta->mesh->t_offset; |
b7ffbd7e | 2106 | } |
433f5bc1 JB |
2107 | sinfo->local_pm = sta->mesh->local_pm; |
2108 | sinfo->peer_pm = sta->mesh->peer_pm; | |
2109 | sinfo->nonpeer_pm = sta->mesh->nonpeer_pm; | |
b7ffbd7e JB |
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; | |
785e21a8 | 2120 | sinfo->bss_param.dtim_period = sdata->vif.bss_conf.dtim_period; |
b7ffbd7e JB |
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); | |
a74a8c84 | 2135 | if (sta->sta.wme) |
b7ffbd7e JB |
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) { | |
319090bf | 2153 | sinfo->filled |= BIT(NL80211_STA_INFO_EXPECTED_THROUGHPUT); |
b7ffbd7e JB |
2154 | sinfo->expected_throughput = thr; |
2155 | } | |
2156 | } |