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 |
f59374eb | 5 | * Copyright (C) 2015 - 2016 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]); | |
f2ac7e30 | 119 | txqi->byte_cnt = 0; |
ba8c3d6f FF |
120 | } |
121 | } | |
122 | ||
b22cfcfc EP |
123 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { |
124 | local->total_ps_buffered -= skb_queue_len(&sta->ps_tx_buf[ac]); | |
1f98ab7f FF |
125 | ieee80211_purge_tx_queue(&local->hw, &sta->ps_tx_buf[ac]); |
126 | ieee80211_purge_tx_queue(&local->hw, &sta->tx_filtered[ac]); | |
b22cfcfc EP |
127 | } |
128 | ||
45b5028e TP |
129 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
130 | mesh_sta_cleanup(sta); | |
b22cfcfc | 131 | |
5ac2e350 | 132 | cancel_work_sync(&sta->drv_deliver_wk); |
b22cfcfc EP |
133 | |
134 | /* | |
135 | * Destroy aggregation state here. It would be nice to wait for the | |
136 | * driver to finish aggregation stop and then clean up, but for now | |
137 | * drivers have to handle aggregation stop being requested, followed | |
138 | * directly by station destruction. | |
139 | */ | |
5a306f58 | 140 | for (i = 0; i < IEEE80211_NUM_TIDS; i++) { |
661eb381 | 141 | kfree(sta->ampdu_mlme.tid_start_tx[i]); |
b22cfcfc EP |
142 | tid_tx = rcu_dereference_raw(sta->ampdu_mlme.tid_tx[i]); |
143 | if (!tid_tx) | |
144 | continue; | |
1f98ab7f | 145 | ieee80211_purge_tx_queue(&local->hw, &tid_tx->pending); |
b22cfcfc EP |
146 | kfree(tid_tx); |
147 | } | |
5108ca82 | 148 | } |
b22cfcfc | 149 | |
5108ca82 JB |
150 | static void cleanup_single_sta(struct sta_info *sta) |
151 | { | |
152 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
153 | struct ieee80211_local *local = sdata->local; | |
154 | ||
155 | __cleanup_single_sta(sta); | |
b22cfcfc EP |
156 | sta_info_free(local, sta); |
157 | } | |
158 | ||
d0709a65 | 159 | /* protected by RCU */ |
abe60632 JB |
160 | struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata, |
161 | const u8 *addr) | |
f0706e82 | 162 | { |
abe60632 | 163 | struct ieee80211_local *local = sdata->local; |
60f4b626 JB |
164 | struct sta_info *sta; |
165 | struct rhash_head *tmp; | |
166 | const struct bucket_table *tbl; | |
f0706e82 | 167 | |
60f4b626 JB |
168 | rcu_read_lock(); |
169 | tbl = rht_dereference_rcu(local->sta_hash.tbl, &local->sta_hash); | |
f0706e82 | 170 | |
60f4b626 JB |
171 | for_each_sta_info(local, tbl, addr, sta, tmp) { |
172 | if (sta->sdata == sdata) { | |
173 | rcu_read_unlock(); | |
174 | /* this is safe as the caller must already hold | |
175 | * another rcu read section or the mutex | |
176 | */ | |
177 | return sta; | |
178 | } | |
179 | } | |
180 | rcu_read_unlock(); | |
181 | return NULL; | |
43ba7e95 JB |
182 | } |
183 | ||
0e5ded5a FF |
184 | /* |
185 | * Get sta info either from the specified interface | |
186 | * or from one of its vlans | |
187 | */ | |
188 | struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata, | |
189 | const u8 *addr) | |
190 | { | |
191 | struct ieee80211_local *local = sdata->local; | |
192 | struct sta_info *sta; | |
7bedd0cf JB |
193 | struct rhash_head *tmp; |
194 | const struct bucket_table *tbl; | |
0e5ded5a | 195 | |
7bedd0cf JB |
196 | rcu_read_lock(); |
197 | tbl = rht_dereference_rcu(local->sta_hash.tbl, &local->sta_hash); | |
198 | ||
199 | for_each_sta_info(local, tbl, addr, sta, tmp) { | |
200 | if (sta->sdata == sdata || | |
201 | (sta->sdata->bss && sta->sdata->bss == sdata->bss)) { | |
202 | rcu_read_unlock(); | |
203 | /* this is safe as the caller must already hold | |
204 | * another rcu read section or the mutex | |
205 | */ | |
206 | return sta; | |
207 | } | |
0e5ded5a | 208 | } |
7bedd0cf JB |
209 | rcu_read_unlock(); |
210 | return NULL; | |
0e5ded5a FF |
211 | } |
212 | ||
3b53fde8 JB |
213 | struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata, |
214 | int idx) | |
ee385855 | 215 | { |
3b53fde8 | 216 | struct ieee80211_local *local = sdata->local; |
ee385855 LCC |
217 | struct sta_info *sta; |
218 | int i = 0; | |
219 | ||
d0709a65 | 220 | list_for_each_entry_rcu(sta, &local->sta_list, list) { |
3b53fde8 | 221 | if (sdata != sta->sdata) |
2a8ca29a | 222 | continue; |
ee385855 LCC |
223 | if (i < idx) { |
224 | ++i; | |
225 | continue; | |
ee385855 | 226 | } |
2a8ca29a | 227 | return sta; |
ee385855 | 228 | } |
ee385855 LCC |
229 | |
230 | return NULL; | |
231 | } | |
f0706e82 | 232 | |
93e5deb1 | 233 | /** |
d9a7ddb0 | 234 | * sta_info_free - free STA |
93e5deb1 | 235 | * |
6ef307bc | 236 | * @local: pointer to the global information |
93e5deb1 JB |
237 | * @sta: STA info to free |
238 | * | |
239 | * This function must undo everything done by sta_info_alloc() | |
d9a7ddb0 JB |
240 | * that may happen before sta_info_insert(). It may only be |
241 | * called when sta_info_insert() has not been attempted (and | |
242 | * if that fails, the station is freed anyway.) | |
93e5deb1 | 243 | */ |
d9a7ddb0 | 244 | void sta_info_free(struct ieee80211_local *local, struct sta_info *sta) |
93e5deb1 | 245 | { |
889cbb91 | 246 | if (sta->rate_ctrl) |
af65cd96 | 247 | rate_control_free_sta(sta); |
93e5deb1 | 248 | |
bdcbd8e0 | 249 | sta_dbg(sta->sdata, "Destroyed STA %pM\n", sta->sta.addr); |
93e5deb1 | 250 | |
ba8c3d6f FF |
251 | if (sta->sta.txq[0]) |
252 | kfree(to_txq_info(sta->sta.txq[0])); | |
53d04525 | 253 | kfree(rcu_dereference_raw(sta->sta.rates)); |
433f5bc1 JB |
254 | #ifdef CONFIG_MAC80211_MESH |
255 | kfree(sta->mesh); | |
256 | #endif | |
93e5deb1 JB |
257 | kfree(sta); |
258 | } | |
259 | ||
4d33960b | 260 | /* Caller must hold local->sta_mtx */ |
d0709a65 JB |
261 | static void sta_info_hash_add(struct ieee80211_local *local, |
262 | struct sta_info *sta) | |
f0706e82 | 263 | { |
7bedd0cf JB |
264 | rhashtable_insert_fast(&local->sta_hash, &sta->hash_node, |
265 | sta_rht_params); | |
f0706e82 | 266 | } |
f0706e82 | 267 | |
5ac2e350 | 268 | static void sta_deliver_ps_frames(struct work_struct *wk) |
af818581 JB |
269 | { |
270 | struct sta_info *sta; | |
271 | ||
5ac2e350 | 272 | sta = container_of(wk, struct sta_info, drv_deliver_wk); |
af818581 JB |
273 | |
274 | if (sta->dead) | |
275 | return; | |
276 | ||
5ac2e350 JB |
277 | local_bh_disable(); |
278 | if (!test_sta_flag(sta, WLAN_STA_PS_STA)) | |
af818581 | 279 | ieee80211_sta_ps_deliver_wakeup(sta); |
5ac2e350 | 280 | else if (test_and_clear_sta_flag(sta, WLAN_STA_PSPOLL)) |
af818581 | 281 | ieee80211_sta_ps_deliver_poll_response(sta); |
5ac2e350 | 282 | else if (test_and_clear_sta_flag(sta, WLAN_STA_UAPSD)) |
47086fc5 | 283 | ieee80211_sta_ps_deliver_uapsd(sta); |
5ac2e350 | 284 | local_bh_enable(); |
af818581 JB |
285 | } |
286 | ||
af65cd96 JB |
287 | static int sta_prepare_rate_control(struct ieee80211_local *local, |
288 | struct sta_info *sta, gfp_t gfp) | |
289 | { | |
30686bf7 | 290 | if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) |
af65cd96 JB |
291 | return 0; |
292 | ||
889cbb91 | 293 | sta->rate_ctrl = local->rate_ctrl; |
af65cd96 | 294 | sta->rate_ctrl_priv = rate_control_alloc_sta(sta->rate_ctrl, |
35c347ac | 295 | sta, gfp); |
889cbb91 | 296 | if (!sta->rate_ctrl_priv) |
af65cd96 | 297 | return -ENOMEM; |
af65cd96 JB |
298 | |
299 | return 0; | |
300 | } | |
301 | ||
73651ee6 | 302 | struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata, |
56544160 | 303 | const u8 *addr, gfp_t gfp) |
f0706e82 | 304 | { |
d0709a65 | 305 | struct ieee80211_local *local = sdata->local; |
ba8c3d6f | 306 | struct ieee80211_hw *hw = &local->hw; |
f0706e82 | 307 | struct sta_info *sta; |
16c5f15c | 308 | int i; |
f0706e82 | 309 | |
ba8c3d6f | 310 | sta = kzalloc(sizeof(*sta) + hw->sta_data_size, gfp); |
f0706e82 | 311 | if (!sta) |
73651ee6 | 312 | return NULL; |
f0706e82 | 313 | |
07346f81 | 314 | spin_lock_init(&sta->lock); |
1d147bfa | 315 | spin_lock_init(&sta->ps_lock); |
5ac2e350 | 316 | INIT_WORK(&sta->drv_deliver_wk, sta_deliver_ps_frames); |
67c282c0 | 317 | INIT_WORK(&sta->ampdu_mlme.work, ieee80211_ba_session_work); |
a93e3644 | 318 | mutex_init(&sta->ampdu_mlme.mtx); |
87f59c70 | 319 | #ifdef CONFIG_MAC80211_MESH |
433f5bc1 JB |
320 | if (ieee80211_vif_is_mesh(&sdata->vif)) { |
321 | sta->mesh = kzalloc(sizeof(*sta->mesh), gfp); | |
322 | if (!sta->mesh) | |
323 | goto free; | |
324 | spin_lock_init(&sta->mesh->plink_lock); | |
325 | if (ieee80211_vif_is_mesh(&sdata->vif) && | |
326 | !sdata->u.mesh.user_mpm) | |
327 | init_timer(&sta->mesh->plink_timer); | |
328 | sta->mesh->nonpeer_pm = NL80211_MESH_POWER_ACTIVE; | |
329 | } | |
87f59c70 | 330 | #endif |
07346f81 | 331 | |
ac100ce5 | 332 | memcpy(sta->addr, addr, ETH_ALEN); |
17741cdc | 333 | memcpy(sta->sta.addr, addr, ETH_ALEN); |
d0709a65 JB |
334 | sta->local = local; |
335 | sta->sdata = sdata; | |
e5a9f8d0 | 336 | sta->rx_stats.last_rx = jiffies; |
f0706e82 | 337 | |
0f9c5a61 JB |
338 | u64_stats_init(&sta->rx_stats.syncp); |
339 | ||
71ec375c JB |
340 | sta->sta_state = IEEE80211_STA_NONE; |
341 | ||
b6da911b LK |
342 | /* Mark TID as unreserved */ |
343 | sta->reserved_tid = IEEE80211_TID_UNRESERVED; | |
344 | ||
84b00607 | 345 | sta->last_connected = ktime_get_seconds(); |
0be6ed13 JB |
346 | ewma_signal_init(&sta->rx_stats_avg.signal); |
347 | for (i = 0; i < ARRAY_SIZE(sta->rx_stats_avg.chain_signal); i++) | |
348 | ewma_signal_init(&sta->rx_stats_avg.chain_signal[i]); | |
541a45a1 | 349 | |
ba8c3d6f FF |
350 | if (local->ops->wake_tx_queue) { |
351 | void *txq_data; | |
352 | int size = sizeof(struct txq_info) + | |
353 | ALIGN(hw->txq_data_size, sizeof(void *)); | |
354 | ||
355 | txq_data = kcalloc(ARRAY_SIZE(sta->sta.txq), size, gfp); | |
356 | if (!txq_data) | |
357 | goto free; | |
358 | ||
359 | for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) { | |
360 | struct txq_info *txq = txq_data + i * size; | |
361 | ||
362 | ieee80211_init_tx_queue(sdata, sta, txq, i); | |
363 | } | |
abfbc3af | 364 | } |
f0706e82 | 365 | |
ba8c3d6f FF |
366 | if (sta_prepare_rate_control(local, sta, gfp)) |
367 | goto free_txq; | |
368 | ||
5a306f58 | 369 | for (i = 0; i < IEEE80211_NUM_TIDS; i++) { |
a622ab72 JB |
370 | /* |
371 | * timer_to_tid must be initialized with identity mapping | |
372 | * to enable session_timer's data differentiation. See | |
373 | * sta_rx_agg_session_timer_expired for usage. | |
374 | */ | |
16c5f15c | 375 | sta->timer_to_tid[i] = i; |
16c5f15c | 376 | } |
948d887d JB |
377 | for (i = 0; i < IEEE80211_NUM_ACS; i++) { |
378 | skb_queue_head_init(&sta->ps_tx_buf[i]); | |
379 | skb_queue_head_init(&sta->tx_filtered[i]); | |
380 | } | |
73651ee6 | 381 | |
5a306f58 | 382 | for (i = 0; i < IEEE80211_NUM_TIDS; i++) |
4be929be | 383 | sta->last_seq_ctrl[i] = cpu_to_le16(USHRT_MAX); |
cccaec98 | 384 | |
af0ed69b | 385 | sta->sta.smps_mode = IEEE80211_SMPS_OFF; |
687da132 EG |
386 | if (sdata->vif.type == NL80211_IFTYPE_AP || |
387 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { | |
388 | struct ieee80211_supported_band *sband = | |
ba8c3d6f | 389 | hw->wiphy->bands[ieee80211_get_sdata_band(sdata)]; |
687da132 EG |
390 | u8 smps = (sband->ht_cap.cap & IEEE80211_HT_CAP_SM_PS) >> |
391 | IEEE80211_HT_CAP_SM_PS_SHIFT; | |
392 | /* | |
393 | * Assume that hostapd advertises our caps in the beacon and | |
394 | * this is the known_smps_mode for a station that just assciated | |
395 | */ | |
396 | switch (smps) { | |
397 | case WLAN_HT_SMPS_CONTROL_DISABLED: | |
398 | sta->known_smps_mode = IEEE80211_SMPS_OFF; | |
399 | break; | |
400 | case WLAN_HT_SMPS_CONTROL_STATIC: | |
401 | sta->known_smps_mode = IEEE80211_SMPS_STATIC; | |
402 | break; | |
403 | case WLAN_HT_SMPS_CONTROL_DYNAMIC: | |
404 | sta->known_smps_mode = IEEE80211_SMPS_DYNAMIC; | |
405 | break; | |
406 | default: | |
407 | WARN_ON(1); | |
408 | } | |
409 | } | |
af0ed69b | 410 | |
bdcbd8e0 | 411 | sta_dbg(sdata, "Allocated STA %pM\n", sta->sta.addr); |
ef04a297 | 412 | |
abfbc3af | 413 | return sta; |
ba8c3d6f FF |
414 | |
415 | free_txq: | |
416 | if (sta->sta.txq[0]) | |
417 | kfree(to_txq_info(sta->sta.txq[0])); | |
418 | free: | |
433f5bc1 JB |
419 | #ifdef CONFIG_MAC80211_MESH |
420 | kfree(sta->mesh); | |
421 | #endif | |
ba8c3d6f FF |
422 | kfree(sta); |
423 | return NULL; | |
73651ee6 JB |
424 | } |
425 | ||
8c71df7a | 426 | static int sta_info_insert_check(struct sta_info *sta) |
34e89507 | 427 | { |
34e89507 | 428 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
34e89507 | 429 | |
03e4497e JB |
430 | /* |
431 | * Can't be a WARN_ON because it can be triggered through a race: | |
432 | * something inserts a STA (on one CPU) without holding the RTNL | |
433 | * and another CPU turns off the net device. | |
434 | */ | |
8c71df7a GE |
435 | if (unlikely(!ieee80211_sdata_running(sdata))) |
436 | return -ENETDOWN; | |
03e4497e | 437 | |
b203ca39 | 438 | if (WARN_ON(ether_addr_equal(sta->sta.addr, sdata->vif.addr) || |
8c71df7a GE |
439 | is_multicast_ether_addr(sta->sta.addr))) |
440 | return -EINVAL; | |
441 | ||
31104891 JB |
442 | /* Strictly speaking this isn't necessary as we hold the mutex, but |
443 | * the rhashtable code can't really deal with that distinction. We | |
444 | * do require the mutex for correctness though. | |
445 | */ | |
446 | rcu_read_lock(); | |
447 | lockdep_assert_held(&sdata->local->sta_mtx); | |
448 | if (ieee80211_hw_check(&sdata->local->hw, NEEDS_UNIQUE_STA_ADDR) && | |
449 | ieee80211_find_sta_by_ifaddr(&sdata->local->hw, sta->addr, NULL)) { | |
450 | rcu_read_unlock(); | |
451 | return -ENOTUNIQ; | |
452 | } | |
453 | rcu_read_unlock(); | |
454 | ||
8c71df7a GE |
455 | return 0; |
456 | } | |
457 | ||
f09603a2 JB |
458 | static int sta_info_insert_drv_state(struct ieee80211_local *local, |
459 | struct ieee80211_sub_if_data *sdata, | |
460 | struct sta_info *sta) | |
461 | { | |
462 | enum ieee80211_sta_state state; | |
463 | int err = 0; | |
464 | ||
465 | for (state = IEEE80211_STA_NOTEXIST; state < sta->sta_state; state++) { | |
466 | err = drv_sta_state(local, sdata, sta, state, state + 1); | |
467 | if (err) | |
468 | break; | |
469 | } | |
470 | ||
471 | if (!err) { | |
a4ec45a4 JB |
472 | /* |
473 | * Drivers using legacy sta_add/sta_remove callbacks only | |
474 | * get uploaded set to true after sta_add is called. | |
475 | */ | |
476 | if (!local->ops->sta_add) | |
477 | sta->uploaded = true; | |
f09603a2 JB |
478 | return 0; |
479 | } | |
480 | ||
481 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { | |
bdcbd8e0 JB |
482 | sdata_info(sdata, |
483 | "failed to move IBSS STA %pM to state %d (%d) - keeping it anyway\n", | |
484 | sta->sta.addr, state + 1, err); | |
f09603a2 JB |
485 | err = 0; |
486 | } | |
487 | ||
488 | /* unwind on error */ | |
489 | for (; state > IEEE80211_STA_NOTEXIST; state--) | |
490 | WARN_ON(drv_sta_state(local, sdata, sta, state, state - 1)); | |
491 | ||
492 | return err; | |
493 | } | |
494 | ||
8c71df7a GE |
495 | /* |
496 | * should be called with sta_mtx locked | |
497 | * this function replaces the mutex lock | |
498 | * with a RCU lock | |
499 | */ | |
4d33960b | 500 | static int sta_info_insert_finish(struct sta_info *sta) __acquires(RCU) |
8c71df7a GE |
501 | { |
502 | struct ieee80211_local *local = sta->local; | |
503 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
0ef049dc | 504 | struct station_info *sinfo; |
8c71df7a GE |
505 | int err = 0; |
506 | ||
507 | lockdep_assert_held(&local->sta_mtx); | |
34e89507 | 508 | |
0ef049dc AB |
509 | sinfo = kzalloc(sizeof(struct station_info), GFP_KERNEL); |
510 | if (!sinfo) { | |
511 | err = -ENOMEM; | |
512 | goto out_err; | |
513 | } | |
514 | ||
7852e361 JB |
515 | /* check if STA exists already */ |
516 | if (sta_info_get_bss(sdata, sta->sta.addr)) { | |
517 | err = -EEXIST; | |
518 | goto out_err; | |
4d33960b | 519 | } |
32bfd35d | 520 | |
7852e361 JB |
521 | local->num_sta++; |
522 | local->sta_generation++; | |
523 | smp_mb(); | |
4d33960b | 524 | |
5108ca82 JB |
525 | /* simplify things and don't accept BA sessions yet */ |
526 | set_sta_flag(sta, WLAN_STA_BLOCK_BA); | |
527 | ||
7852e361 JB |
528 | /* make the station visible */ |
529 | sta_info_hash_add(local, sta); | |
83d5cc01 | 530 | |
2bad7748 | 531 | list_add_tail_rcu(&sta->list, &local->sta_list); |
4d33960b | 532 | |
5108ca82 JB |
533 | /* notify driver */ |
534 | err = sta_info_insert_drv_state(local, sdata, sta); | |
535 | if (err) | |
536 | goto out_remove; | |
537 | ||
7852e361 | 538 | set_sta_flag(sta, WLAN_STA_INSERTED); |
5108ca82 JB |
539 | /* accept BA sessions now */ |
540 | clear_sta_flag(sta, WLAN_STA_BLOCK_BA); | |
4d33960b | 541 | |
7852e361 JB |
542 | ieee80211_sta_debugfs_add(sta); |
543 | rate_control_add_sta_debugfs(sta); | |
4d33960b | 544 | |
0ef049dc AB |
545 | sinfo->generation = local->sta_generation; |
546 | cfg80211_new_sta(sdata->dev, sta->sta.addr, sinfo, GFP_KERNEL); | |
547 | kfree(sinfo); | |
d0709a65 | 548 | |
bdcbd8e0 | 549 | sta_dbg(sdata, "Inserted STA %pM\n", sta->sta.addr); |
f0706e82 | 550 | |
34e89507 JB |
551 | /* move reference to rcu-protected */ |
552 | rcu_read_lock(); | |
553 | mutex_unlock(&local->sta_mtx); | |
e9f207f0 | 554 | |
73651ee6 JB |
555 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
556 | mesh_accept_plinks_update(sdata); | |
557 | ||
8c71df7a | 558 | return 0; |
5108ca82 JB |
559 | out_remove: |
560 | sta_info_hash_del(local, sta); | |
561 | list_del_rcu(&sta->list); | |
562 | local->num_sta--; | |
563 | synchronize_net(); | |
564 | __cleanup_single_sta(sta); | |
4d33960b JB |
565 | out_err: |
566 | mutex_unlock(&local->sta_mtx); | |
ea32f065 | 567 | kfree(sinfo); |
4d33960b JB |
568 | rcu_read_lock(); |
569 | return err; | |
8c71df7a GE |
570 | } |
571 | ||
572 | int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU) | |
573 | { | |
574 | struct ieee80211_local *local = sta->local; | |
308f7fcf | 575 | int err; |
8c71df7a | 576 | |
4d33960b JB |
577 | might_sleep(); |
578 | ||
31104891 JB |
579 | mutex_lock(&local->sta_mtx); |
580 | ||
8c71df7a GE |
581 | err = sta_info_insert_check(sta); |
582 | if (err) { | |
31104891 | 583 | mutex_unlock(&local->sta_mtx); |
8c71df7a GE |
584 | rcu_read_lock(); |
585 | goto out_free; | |
586 | } | |
587 | ||
4d33960b | 588 | err = sta_info_insert_finish(sta); |
8c71df7a GE |
589 | if (err) |
590 | goto out_free; | |
591 | ||
73651ee6 | 592 | return 0; |
93e5deb1 | 593 | out_free: |
d9a7ddb0 | 594 | sta_info_free(local, sta); |
93e5deb1 | 595 | return err; |
f0706e82 JB |
596 | } |
597 | ||
34e89507 JB |
598 | int sta_info_insert(struct sta_info *sta) |
599 | { | |
600 | int err = sta_info_insert_rcu(sta); | |
601 | ||
602 | rcu_read_unlock(); | |
603 | ||
604 | return err; | |
605 | } | |
606 | ||
d012a605 | 607 | static inline void __bss_tim_set(u8 *tim, u16 id) |
004c872e JB |
608 | { |
609 | /* | |
610 | * This format has been mandated by the IEEE specifications, | |
611 | * so this line may not be changed to use the __set_bit() format. | |
612 | */ | |
d012a605 | 613 | tim[id / 8] |= (1 << (id % 8)); |
004c872e JB |
614 | } |
615 | ||
d012a605 | 616 | static inline void __bss_tim_clear(u8 *tim, u16 id) |
004c872e JB |
617 | { |
618 | /* | |
619 | * This format has been mandated by the IEEE specifications, | |
620 | * so this line may not be changed to use the __clear_bit() format. | |
621 | */ | |
d012a605 | 622 | tim[id / 8] &= ~(1 << (id % 8)); |
004c872e JB |
623 | } |
624 | ||
3d5839b6 IP |
625 | static inline bool __bss_tim_get(u8 *tim, u16 id) |
626 | { | |
627 | /* | |
628 | * This format has been mandated by the IEEE specifications, | |
629 | * so this line may not be changed to use the test_bit() format. | |
630 | */ | |
631 | return tim[id / 8] & (1 << (id % 8)); | |
632 | } | |
633 | ||
948d887d | 634 | static unsigned long ieee80211_tids_for_ac(int ac) |
004c872e | 635 | { |
948d887d JB |
636 | /* If we ever support TIDs > 7, this obviously needs to be adjusted */ |
637 | switch (ac) { | |
638 | case IEEE80211_AC_VO: | |
639 | return BIT(6) | BIT(7); | |
640 | case IEEE80211_AC_VI: | |
641 | return BIT(4) | BIT(5); | |
642 | case IEEE80211_AC_BE: | |
643 | return BIT(0) | BIT(3); | |
644 | case IEEE80211_AC_BK: | |
645 | return BIT(1) | BIT(2); | |
646 | default: | |
647 | WARN_ON(1); | |
648 | return 0; | |
d0709a65 | 649 | } |
004c872e JB |
650 | } |
651 | ||
9b7a86f3 | 652 | static void __sta_info_recalc_tim(struct sta_info *sta, bool ignore_pending) |
004c872e | 653 | { |
c868cb35 | 654 | struct ieee80211_local *local = sta->local; |
d012a605 | 655 | struct ps_data *ps; |
948d887d JB |
656 | bool indicate_tim = false; |
657 | u8 ignore_for_tim = sta->sta.uapsd_queues; | |
658 | int ac; | |
a69bd8e6 | 659 | u16 id = sta->sta.aid; |
d012a605 MP |
660 | |
661 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP || | |
662 | sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { | |
663 | if (WARN_ON_ONCE(!sta->sdata->bss)) | |
664 | return; | |
004c872e | 665 | |
d012a605 | 666 | ps = &sta->sdata->bss->ps; |
3f52b7e3 MP |
667 | #ifdef CONFIG_MAC80211_MESH |
668 | } else if (ieee80211_vif_is_mesh(&sta->sdata->vif)) { | |
669 | ps = &sta->sdata->u.mesh.ps; | |
3f52b7e3 | 670 | #endif |
d012a605 | 671 | } else { |
c868cb35 | 672 | return; |
d012a605 | 673 | } |
3e122be0 | 674 | |
c868cb35 | 675 | /* No need to do anything if the driver does all */ |
30686bf7 | 676 | if (ieee80211_hw_check(&local->hw, AP_LINK_PS)) |
c868cb35 | 677 | return; |
004c872e | 678 | |
c868cb35 JB |
679 | if (sta->dead) |
680 | goto done; | |
3e122be0 | 681 | |
948d887d JB |
682 | /* |
683 | * If all ACs are delivery-enabled then we should build | |
684 | * the TIM bit for all ACs anyway; if only some are then | |
685 | * we ignore those and build the TIM bit using only the | |
686 | * non-enabled ones. | |
687 | */ | |
688 | if (ignore_for_tim == BIT(IEEE80211_NUM_ACS) - 1) | |
689 | ignore_for_tim = 0; | |
690 | ||
9b7a86f3 JB |
691 | if (ignore_pending) |
692 | ignore_for_tim = BIT(IEEE80211_NUM_ACS) - 1; | |
693 | ||
948d887d JB |
694 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { |
695 | unsigned long tids; | |
3e122be0 | 696 | |
948d887d JB |
697 | if (ignore_for_tim & BIT(ac)) |
698 | continue; | |
699 | ||
700 | indicate_tim |= !skb_queue_empty(&sta->tx_filtered[ac]) || | |
701 | !skb_queue_empty(&sta->ps_tx_buf[ac]); | |
702 | if (indicate_tim) | |
703 | break; | |
3e122be0 | 704 | |
948d887d JB |
705 | tids = ieee80211_tids_for_ac(ac); |
706 | ||
707 | indicate_tim |= | |
708 | sta->driver_buffered_tids & tids; | |
ba8c3d6f FF |
709 | indicate_tim |= |
710 | sta->txq_buffered_tids & tids; | |
d0709a65 | 711 | } |
004c872e | 712 | |
c868cb35 | 713 | done: |
65f704a5 | 714 | spin_lock_bh(&local->tim_lock); |
004c872e | 715 | |
3d5839b6 IP |
716 | if (indicate_tim == __bss_tim_get(ps->tim, id)) |
717 | goto out_unlock; | |
718 | ||
948d887d | 719 | if (indicate_tim) |
d012a605 | 720 | __bss_tim_set(ps->tim, id); |
c868cb35 | 721 | else |
d012a605 | 722 | __bss_tim_clear(ps->tim, id); |
004c872e | 723 | |
9b7a86f3 | 724 | if (local->ops->set_tim && !WARN_ON(sta->dead)) { |
c868cb35 | 725 | local->tim_in_locked_section = true; |
948d887d | 726 | drv_set_tim(local, &sta->sta, indicate_tim); |
c868cb35 JB |
727 | local->tim_in_locked_section = false; |
728 | } | |
3e122be0 | 729 | |
3d5839b6 | 730 | out_unlock: |
65f704a5 | 731 | spin_unlock_bh(&local->tim_lock); |
004c872e JB |
732 | } |
733 | ||
9b7a86f3 JB |
734 | void sta_info_recalc_tim(struct sta_info *sta) |
735 | { | |
736 | __sta_info_recalc_tim(sta, false); | |
737 | } | |
738 | ||
cd0b8d89 | 739 | static bool sta_info_buffer_expired(struct sta_info *sta, struct sk_buff *skb) |
f0706e82 | 740 | { |
e039fa4a | 741 | struct ieee80211_tx_info *info; |
f0706e82 JB |
742 | int timeout; |
743 | ||
744 | if (!skb) | |
cd0b8d89 | 745 | return false; |
f0706e82 | 746 | |
e039fa4a | 747 | info = IEEE80211_SKB_CB(skb); |
f0706e82 JB |
748 | |
749 | /* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */ | |
57c4d7b4 JB |
750 | timeout = (sta->listen_interval * |
751 | sta->sdata->vif.bss_conf.beacon_int * | |
752 | 32 / 15625) * HZ; | |
f0706e82 JB |
753 | if (timeout < STA_TX_BUFFER_EXPIRE) |
754 | timeout = STA_TX_BUFFER_EXPIRE; | |
e039fa4a | 755 | return time_after(jiffies, info->control.jiffies + timeout); |
f0706e82 JB |
756 | } |
757 | ||
758 | ||
948d887d JB |
759 | static bool sta_info_cleanup_expire_buffered_ac(struct ieee80211_local *local, |
760 | struct sta_info *sta, int ac) | |
f0706e82 JB |
761 | { |
762 | unsigned long flags; | |
763 | struct sk_buff *skb; | |
764 | ||
60750397 JB |
765 | /* |
766 | * First check for frames that should expire on the filtered | |
767 | * queue. Frames here were rejected by the driver and are on | |
768 | * a separate queue to avoid reordering with normal PS-buffered | |
769 | * frames. They also aren't accounted for right now in the | |
770 | * total_ps_buffered counter. | |
771 | */ | |
772 | for (;;) { | |
948d887d JB |
773 | spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags); |
774 | skb = skb_peek(&sta->tx_filtered[ac]); | |
60750397 | 775 | if (sta_info_buffer_expired(sta, skb)) |
948d887d | 776 | skb = __skb_dequeue(&sta->tx_filtered[ac]); |
60750397 JB |
777 | else |
778 | skb = NULL; | |
948d887d | 779 | spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags); |
60750397 JB |
780 | |
781 | /* | |
782 | * Frames are queued in order, so if this one | |
783 | * hasn't expired yet we can stop testing. If | |
784 | * we actually reached the end of the queue we | |
785 | * also need to stop, of course. | |
786 | */ | |
787 | if (!skb) | |
788 | break; | |
d4fa14cd | 789 | ieee80211_free_txskb(&local->hw, skb); |
60750397 JB |
790 | } |
791 | ||
792 | /* | |
793 | * Now also check the normal PS-buffered queue, this will | |
794 | * only find something if the filtered queue was emptied | |
795 | * since the filtered frames are all before the normal PS | |
796 | * buffered frames. | |
797 | */ | |
f0706e82 | 798 | for (;;) { |
948d887d JB |
799 | spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags); |
800 | skb = skb_peek(&sta->ps_tx_buf[ac]); | |
57c4d7b4 | 801 | if (sta_info_buffer_expired(sta, skb)) |
948d887d | 802 | skb = __skb_dequeue(&sta->ps_tx_buf[ac]); |
836341a7 | 803 | else |
f0706e82 | 804 | skb = NULL; |
948d887d | 805 | spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags); |
f0706e82 | 806 | |
60750397 JB |
807 | /* |
808 | * frames are queued in order, so if this one | |
809 | * hasn't expired yet (or we reached the end of | |
810 | * the queue) we can stop testing | |
811 | */ | |
836341a7 | 812 | if (!skb) |
f0706e82 | 813 | break; |
836341a7 | 814 | |
836341a7 | 815 | local->total_ps_buffered--; |
bdcbd8e0 JB |
816 | ps_dbg(sta->sdata, "Buffered frame expired (STA %pM)\n", |
817 | sta->sta.addr); | |
d4fa14cd | 818 | ieee80211_free_txskb(&local->hw, skb); |
f0706e82 | 819 | } |
3393a608 | 820 | |
60750397 JB |
821 | /* |
822 | * Finally, recalculate the TIM bit for this station -- it might | |
823 | * now be clear because the station was too slow to retrieve its | |
824 | * frames. | |
825 | */ | |
826 | sta_info_recalc_tim(sta); | |
827 | ||
828 | /* | |
829 | * Return whether there are any frames still buffered, this is | |
830 | * used to check whether the cleanup timer still needs to run, | |
831 | * if there are no frames we don't need to rearm the timer. | |
832 | */ | |
948d887d JB |
833 | return !(skb_queue_empty(&sta->ps_tx_buf[ac]) && |
834 | skb_queue_empty(&sta->tx_filtered[ac])); | |
835 | } | |
836 | ||
837 | static bool sta_info_cleanup_expire_buffered(struct ieee80211_local *local, | |
838 | struct sta_info *sta) | |
839 | { | |
840 | bool have_buffered = false; | |
841 | int ac; | |
842 | ||
3f52b7e3 MP |
843 | /* This is only necessary for stations on BSS/MBSS interfaces */ |
844 | if (!sta->sdata->bss && | |
845 | !ieee80211_vif_is_mesh(&sta->sdata->vif)) | |
948d887d JB |
846 | return false; |
847 | ||
848 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) | |
849 | have_buffered |= | |
850 | sta_info_cleanup_expire_buffered_ac(local, sta, ac); | |
851 | ||
852 | return have_buffered; | |
f0706e82 JB |
853 | } |
854 | ||
d778207b | 855 | static int __must_check __sta_info_destroy_part1(struct sta_info *sta) |
f0706e82 | 856 | { |
34e89507 JB |
857 | struct ieee80211_local *local; |
858 | struct ieee80211_sub_if_data *sdata; | |
6d10e46b | 859 | int ret; |
f0706e82 | 860 | |
34e89507 | 861 | might_sleep(); |
f0706e82 | 862 | |
34e89507 JB |
863 | if (!sta) |
864 | return -ENOENT; | |
5bb644a0 | 865 | |
34e89507 JB |
866 | local = sta->local; |
867 | sdata = sta->sdata; | |
f0706e82 | 868 | |
83d5cc01 JB |
869 | lockdep_assert_held(&local->sta_mtx); |
870 | ||
098a6070 JB |
871 | /* |
872 | * Before removing the station from the driver and | |
873 | * rate control, it might still start new aggregation | |
874 | * sessions -- block that to make sure the tear-down | |
875 | * will be sufficient. | |
876 | */ | |
c2c98fde | 877 | set_sta_flag(sta, WLAN_STA_BLOCK_BA); |
c82c4a80 | 878 | ieee80211_sta_tear_down_BA_sessions(sta, AGG_STOP_DESTROY_STA); |
098a6070 | 879 | |
f59374eb SS |
880 | /* |
881 | * Before removing the station from the driver there might be pending | |
882 | * rx frames on RSS queues sent prior to the disassociation - wait for | |
883 | * all such frames to be processed. | |
884 | */ | |
885 | drv_sync_rx_queues(local, sta); | |
886 | ||
34e89507 | 887 | ret = sta_info_hash_del(local, sta); |
b01711be | 888 | if (WARN_ON(ret)) |
34e89507 JB |
889 | return ret; |
890 | ||
a7a6bdd0 AN |
891 | /* |
892 | * for TDLS peers, make sure to return to the base channel before | |
893 | * removal. | |
894 | */ | |
895 | if (test_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL)) { | |
896 | drv_tdls_cancel_channel_switch(local, sdata, &sta->sta); | |
897 | clear_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL); | |
898 | } | |
899 | ||
794454ce | 900 | list_del_rcu(&sta->list); |
ef044763 | 901 | sta->removed = true; |
4d33960b | 902 | |
6a9d1b91 JB |
903 | drv_sta_pre_rcu_remove(local, sta->sdata, sta); |
904 | ||
a710c816 JB |
905 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN && |
906 | rcu_access_pointer(sdata->u.vlan.sta) == sta) | |
907 | RCU_INIT_POINTER(sdata->u.vlan.sta, NULL); | |
908 | ||
d778207b JB |
909 | return 0; |
910 | } | |
911 | ||
912 | static void __sta_info_destroy_part2(struct sta_info *sta) | |
913 | { | |
914 | struct ieee80211_local *local = sta->local; | |
915 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
0ef049dc | 916 | struct station_info *sinfo; |
d778207b JB |
917 | int ret; |
918 | ||
919 | /* | |
920 | * NOTE: This assumes at least synchronize_net() was done | |
921 | * after _part1 and before _part2! | |
922 | */ | |
923 | ||
924 | might_sleep(); | |
925 | lockdep_assert_held(&local->sta_mtx); | |
926 | ||
c8782078 | 927 | /* now keys can no longer be reached */ |
6d10e46b | 928 | ieee80211_free_sta_keys(local, sta); |
34e89507 | 929 | |
9b7a86f3 JB |
930 | /* disable TIM bit - last chance to tell driver */ |
931 | __sta_info_recalc_tim(sta, true); | |
932 | ||
34e89507 JB |
933 | sta->dead = true; |
934 | ||
34e89507 JB |
935 | local->num_sta--; |
936 | local->sta_generation++; | |
937 | ||
83d5cc01 | 938 | while (sta->sta_state > IEEE80211_STA_NONE) { |
f09603a2 JB |
939 | ret = sta_info_move_state(sta, sta->sta_state - 1); |
940 | if (ret) { | |
83d5cc01 JB |
941 | WARN_ON_ONCE(1); |
942 | break; | |
943 | } | |
944 | } | |
d9a7ddb0 | 945 | |
f09603a2 | 946 | if (sta->uploaded) { |
f09603a2 JB |
947 | ret = drv_sta_state(local, sdata, sta, IEEE80211_STA_NONE, |
948 | IEEE80211_STA_NOTEXIST); | |
949 | WARN_ON_ONCE(ret != 0); | |
950 | } | |
34e89507 | 951 | |
bdcbd8e0 JB |
952 | sta_dbg(sdata, "Removed STA %pM\n", sta->sta.addr); |
953 | ||
0ef049dc AB |
954 | sinfo = kzalloc(sizeof(*sinfo), GFP_KERNEL); |
955 | if (sinfo) | |
956 | sta_set_sinfo(sta, sinfo); | |
957 | cfg80211_del_sta_sinfo(sdata->dev, sta->sta.addr, sinfo, GFP_KERNEL); | |
958 | kfree(sinfo); | |
ec15e68b | 959 | |
34e89507 JB |
960 | rate_control_remove_sta_debugfs(sta); |
961 | ieee80211_sta_debugfs_remove(sta); | |
962 | ||
d34ba216 | 963 | cleanup_single_sta(sta); |
d778207b JB |
964 | } |
965 | ||
966 | int __must_check __sta_info_destroy(struct sta_info *sta) | |
967 | { | |
968 | int err = __sta_info_destroy_part1(sta); | |
969 | ||
970 | if (err) | |
971 | return err; | |
972 | ||
973 | synchronize_net(); | |
974 | ||
975 | __sta_info_destroy_part2(sta); | |
34e89507 JB |
976 | |
977 | return 0; | |
4d6141c3 JS |
978 | } |
979 | ||
34e89507 | 980 | int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, const u8 *addr) |
4d6141c3 | 981 | { |
34e89507 JB |
982 | struct sta_info *sta; |
983 | int ret; | |
4d6141c3 | 984 | |
34e89507 | 985 | mutex_lock(&sdata->local->sta_mtx); |
7852e361 | 986 | sta = sta_info_get(sdata, addr); |
34e89507 JB |
987 | ret = __sta_info_destroy(sta); |
988 | mutex_unlock(&sdata->local->sta_mtx); | |
4d6141c3 JS |
989 | |
990 | return ret; | |
991 | } | |
992 | ||
34e89507 JB |
993 | int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata, |
994 | const u8 *addr) | |
e9f207f0 | 995 | { |
34e89507 JB |
996 | struct sta_info *sta; |
997 | int ret; | |
e9f207f0 | 998 | |
34e89507 | 999 | mutex_lock(&sdata->local->sta_mtx); |
7852e361 | 1000 | sta = sta_info_get_bss(sdata, addr); |
34e89507 JB |
1001 | ret = __sta_info_destroy(sta); |
1002 | mutex_unlock(&sdata->local->sta_mtx); | |
d0709a65 | 1003 | |
34e89507 JB |
1004 | return ret; |
1005 | } | |
e9f207f0 | 1006 | |
34e89507 JB |
1007 | static void sta_info_cleanup(unsigned long data) |
1008 | { | |
1009 | struct ieee80211_local *local = (struct ieee80211_local *) data; | |
1010 | struct sta_info *sta; | |
3393a608 | 1011 | bool timer_needed = false; |
34e89507 JB |
1012 | |
1013 | rcu_read_lock(); | |
1014 | list_for_each_entry_rcu(sta, &local->sta_list, list) | |
3393a608 JO |
1015 | if (sta_info_cleanup_expire_buffered(local, sta)) |
1016 | timer_needed = true; | |
34e89507 | 1017 | rcu_read_unlock(); |
e9f207f0 | 1018 | |
34e89507 JB |
1019 | if (local->quiescing) |
1020 | return; | |
d0709a65 | 1021 | |
3393a608 JO |
1022 | if (!timer_needed) |
1023 | return; | |
1024 | ||
26d59535 JB |
1025 | mod_timer(&local->sta_cleanup, |
1026 | round_jiffies(jiffies + STA_INFO_CLEANUP_INTERVAL)); | |
e9f207f0 | 1027 | } |
e9f207f0 | 1028 | |
7bedd0cf | 1029 | u32 sta_addr_hash(const void *key, u32 length, u32 seed) |
f0706e82 | 1030 | { |
7bedd0cf JB |
1031 | return jhash(key, ETH_ALEN, seed); |
1032 | } | |
1033 | ||
1034 | int sta_info_init(struct ieee80211_local *local) | |
1035 | { | |
1036 | int err; | |
1037 | ||
1038 | err = rhashtable_init(&local->sta_hash, &sta_rht_params); | |
1039 | if (err) | |
1040 | return err; | |
1041 | ||
4d33960b | 1042 | spin_lock_init(&local->tim_lock); |
34e89507 | 1043 | mutex_init(&local->sta_mtx); |
f0706e82 | 1044 | INIT_LIST_HEAD(&local->sta_list); |
f0706e82 | 1045 | |
b24b8a24 PE |
1046 | setup_timer(&local->sta_cleanup, sta_info_cleanup, |
1047 | (unsigned long)local); | |
7bedd0cf | 1048 | return 0; |
f0706e82 JB |
1049 | } |
1050 | ||
1051 | void sta_info_stop(struct ieee80211_local *local) | |
1052 | { | |
a56f992c | 1053 | del_timer_sync(&local->sta_cleanup); |
7bedd0cf | 1054 | rhashtable_destroy(&local->sta_hash); |
f0706e82 JB |
1055 | } |
1056 | ||
051007d9 | 1057 | |
e716251d | 1058 | int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans) |
f0706e82 | 1059 | { |
b998e8bb | 1060 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 1061 | struct sta_info *sta, *tmp; |
d778207b | 1062 | LIST_HEAD(free_list); |
44213b5e | 1063 | int ret = 0; |
f0706e82 | 1064 | |
d0709a65 | 1065 | might_sleep(); |
be8755e1 | 1066 | |
e716251d JB |
1067 | WARN_ON(vlans && sdata->vif.type != NL80211_IFTYPE_AP); |
1068 | WARN_ON(vlans && !sdata->bss); | |
1069 | ||
34e89507 | 1070 | mutex_lock(&local->sta_mtx); |
d0709a65 | 1071 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { |
e716251d JB |
1072 | if (sdata == sta->sdata || |
1073 | (vlans && sdata->bss == sta->sdata->bss)) { | |
d778207b JB |
1074 | if (!WARN_ON(__sta_info_destroy_part1(sta))) |
1075 | list_add(&sta->free_list, &free_list); | |
34316837 JB |
1076 | ret++; |
1077 | } | |
be8755e1 | 1078 | } |
d778207b JB |
1079 | |
1080 | if (!list_empty(&free_list)) { | |
1081 | synchronize_net(); | |
1082 | list_for_each_entry_safe(sta, tmp, &free_list, free_list) | |
1083 | __sta_info_destroy_part2(sta); | |
1084 | } | |
34e89507 | 1085 | mutex_unlock(&local->sta_mtx); |
44213b5e | 1086 | |
051007d9 JB |
1087 | return ret; |
1088 | } | |
1089 | ||
24723d1b JB |
1090 | void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, |
1091 | unsigned long exp_time) | |
1092 | { | |
1093 | struct ieee80211_local *local = sdata->local; | |
1094 | struct sta_info *sta, *tmp; | |
24723d1b | 1095 | |
34e89507 | 1096 | mutex_lock(&local->sta_mtx); |
e46a2cf9 MSS |
1097 | |
1098 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { | |
b8da6b6a JB |
1099 | unsigned long last_active = ieee80211_sta_last_active(sta); |
1100 | ||
ec2b774e ML |
1101 | if (sdata != sta->sdata) |
1102 | continue; | |
1103 | ||
b8da6b6a | 1104 | if (time_is_before_jiffies(last_active + exp_time)) { |
eea57d42 MSS |
1105 | sta_dbg(sta->sdata, "expiring inactive STA %pM\n", |
1106 | sta->sta.addr); | |
3f52b7e3 MP |
1107 | |
1108 | if (ieee80211_vif_is_mesh(&sdata->vif) && | |
1109 | test_sta_flag(sta, WLAN_STA_PS_STA)) | |
1110 | atomic_dec(&sdata->u.mesh.ps.num_sta_ps); | |
1111 | ||
34e89507 | 1112 | WARN_ON(__sta_info_destroy(sta)); |
24723d1b | 1113 | } |
e46a2cf9 MSS |
1114 | } |
1115 | ||
34e89507 | 1116 | mutex_unlock(&local->sta_mtx); |
24723d1b | 1117 | } |
17741cdc | 1118 | |
686b9cb9 | 1119 | struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw, |
7bedd0cf JB |
1120 | const u8 *addr, |
1121 | const u8 *localaddr) | |
17741cdc | 1122 | { |
7bedd0cf JB |
1123 | struct ieee80211_local *local = hw_to_local(hw); |
1124 | struct sta_info *sta; | |
1125 | struct rhash_head *tmp; | |
1126 | const struct bucket_table *tbl; | |
1127 | ||
1128 | tbl = rht_dereference_rcu(local->sta_hash.tbl, &local->sta_hash); | |
17741cdc | 1129 | |
686b9cb9 BG |
1130 | /* |
1131 | * Just return a random station if localaddr is NULL | |
1132 | * ... first in list. | |
1133 | */ | |
7bedd0cf | 1134 | for_each_sta_info(local, tbl, addr, sta, tmp) { |
686b9cb9 | 1135 | if (localaddr && |
b203ca39 | 1136 | !ether_addr_equal(sta->sdata->vif.addr, localaddr)) |
686b9cb9 | 1137 | continue; |
f7c65594 JB |
1138 | if (!sta->uploaded) |
1139 | return NULL; | |
abe60632 | 1140 | return &sta->sta; |
f7c65594 JB |
1141 | } |
1142 | ||
abe60632 | 1143 | return NULL; |
17741cdc | 1144 | } |
686b9cb9 | 1145 | EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_ifaddr); |
5ed176e1 JB |
1146 | |
1147 | struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif, | |
1148 | const u8 *addr) | |
1149 | { | |
f7c65594 | 1150 | struct sta_info *sta; |
5ed176e1 JB |
1151 | |
1152 | if (!vif) | |
1153 | return NULL; | |
1154 | ||
f7c65594 JB |
1155 | sta = sta_info_get_bss(vif_to_sdata(vif), addr); |
1156 | if (!sta) | |
1157 | return NULL; | |
1158 | ||
1159 | if (!sta->uploaded) | |
1160 | return NULL; | |
5ed176e1 | 1161 | |
f7c65594 | 1162 | return &sta->sta; |
5ed176e1 | 1163 | } |
17741cdc | 1164 | EXPORT_SYMBOL(ieee80211_find_sta); |
af818581 | 1165 | |
e3685e03 JB |
1166 | /* powersave support code */ |
1167 | void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta) | |
50a9432d | 1168 | { |
608383bf | 1169 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
e3685e03 JB |
1170 | struct ieee80211_local *local = sdata->local; |
1171 | struct sk_buff_head pending; | |
ba8c3d6f | 1172 | int filtered = 0, buffered = 0, ac, i; |
e3685e03 | 1173 | unsigned long flags; |
d012a605 MP |
1174 | struct ps_data *ps; |
1175 | ||
3918edb0 FF |
1176 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) |
1177 | sdata = container_of(sdata->bss, struct ieee80211_sub_if_data, | |
1178 | u.ap); | |
1179 | ||
1180 | if (sdata->vif.type == NL80211_IFTYPE_AP) | |
d012a605 | 1181 | ps = &sdata->bss->ps; |
3f52b7e3 MP |
1182 | else if (ieee80211_vif_is_mesh(&sdata->vif)) |
1183 | ps = &sdata->u.mesh.ps; | |
d012a605 MP |
1184 | else |
1185 | return; | |
50a9432d | 1186 | |
c2c98fde | 1187 | clear_sta_flag(sta, WLAN_STA_SP); |
47086fc5 | 1188 | |
5a306f58 | 1189 | BUILD_BUG_ON(BITS_TO_LONGS(IEEE80211_NUM_TIDS) > 1); |
948d887d | 1190 | sta->driver_buffered_tids = 0; |
ba8c3d6f | 1191 | sta->txq_buffered_tids = 0; |
af818581 | 1192 | |
30686bf7 | 1193 | if (!ieee80211_hw_check(&local->hw, AP_LINK_PS)) |
d057e5a3 | 1194 | drv_sta_notify(local, sdata, STA_NOTIFY_AWAKE, &sta->sta); |
af818581 | 1195 | |
ba8c3d6f FF |
1196 | if (sta->sta.txq[0]) { |
1197 | for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) { | |
1198 | struct txq_info *txqi = to_txq_info(sta->sta.txq[i]); | |
1199 | ||
1200 | if (!skb_queue_len(&txqi->queue)) | |
1201 | continue; | |
1202 | ||
1203 | drv_wake_tx_queue(local, txqi); | |
1204 | } | |
1205 | } | |
1206 | ||
948d887d | 1207 | skb_queue_head_init(&pending); |
af818581 | 1208 | |
1d147bfa EG |
1209 | /* sync with ieee80211_tx_h_unicast_ps_buf */ |
1210 | spin_lock(&sta->ps_lock); | |
af818581 | 1211 | /* Send all buffered frames to the station */ |
948d887d JB |
1212 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { |
1213 | int count = skb_queue_len(&pending), tmp; | |
1214 | ||
987c285c | 1215 | spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags); |
948d887d | 1216 | skb_queue_splice_tail_init(&sta->tx_filtered[ac], &pending); |
987c285c | 1217 | spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags); |
948d887d JB |
1218 | tmp = skb_queue_len(&pending); |
1219 | filtered += tmp - count; | |
1220 | count = tmp; | |
1221 | ||
987c285c | 1222 | spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags); |
948d887d | 1223 | skb_queue_splice_tail_init(&sta->ps_tx_buf[ac], &pending); |
987c285c | 1224 | spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags); |
948d887d JB |
1225 | tmp = skb_queue_len(&pending); |
1226 | buffered += tmp - count; | |
1227 | } | |
1228 | ||
e3685e03 | 1229 | ieee80211_add_pending_skbs(local, &pending); |
5ac2e350 JB |
1230 | |
1231 | /* now we're no longer in the deliver code */ | |
1232 | clear_sta_flag(sta, WLAN_STA_PS_DELIVER); | |
1233 | ||
1234 | /* The station might have polled and then woken up before we responded, | |
1235 | * so clear these flags now to avoid them sticking around. | |
1236 | */ | |
1237 | clear_sta_flag(sta, WLAN_STA_PSPOLL); | |
1238 | clear_sta_flag(sta, WLAN_STA_UAPSD); | |
1d147bfa | 1239 | spin_unlock(&sta->ps_lock); |
948d887d | 1240 | |
e3685e03 JB |
1241 | atomic_dec(&ps->num_sta_ps); |
1242 | ||
687da132 | 1243 | /* This station just woke up and isn't aware of our SMPS state */ |
062f1d6d CYY |
1244 | if (!ieee80211_vif_is_mesh(&sdata->vif) && |
1245 | !ieee80211_smps_is_restrictive(sta->known_smps_mode, | |
687da132 EG |
1246 | sdata->smps_mode) && |
1247 | sta->known_smps_mode != sdata->bss->req_smps && | |
1248 | sta_info_tx_streams(sta) != 1) { | |
1249 | ht_dbg(sdata, | |
1250 | "%pM just woke up and MIMO capable - update SMPS\n", | |
1251 | sta->sta.addr); | |
1252 | ieee80211_send_smps_action(sdata, sdata->bss->req_smps, | |
1253 | sta->sta.addr, | |
1254 | sdata->vif.bss_conf.bssid); | |
1255 | } | |
1256 | ||
af818581 JB |
1257 | local->total_ps_buffered -= buffered; |
1258 | ||
c868cb35 JB |
1259 | sta_info_recalc_tim(sta); |
1260 | ||
bdcbd8e0 JB |
1261 | ps_dbg(sdata, |
1262 | "STA %pM aid %d sending %d filtered/%d PS frames since STA not sleeping anymore\n", | |
1263 | sta->sta.addr, sta->sta.aid, filtered, buffered); | |
17c18bf8 JB |
1264 | |
1265 | ieee80211_check_fast_xmit(sta); | |
af818581 JB |
1266 | } |
1267 | ||
0ead2510 | 1268 | static void ieee80211_send_null_response(struct sta_info *sta, int tid, |
b77cf4f8 | 1269 | enum ieee80211_frame_release_type reason, |
0ead2510 | 1270 | bool call_driver, bool more_data) |
af818581 | 1271 | { |
0ead2510 | 1272 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
af818581 | 1273 | struct ieee80211_local *local = sdata->local; |
ce662b44 | 1274 | struct ieee80211_qos_hdr *nullfunc; |
af818581 | 1275 | struct sk_buff *skb; |
ce662b44 JB |
1276 | int size = sizeof(*nullfunc); |
1277 | __le16 fc; | |
a74a8c84 | 1278 | bool qos = sta->sta.wme; |
ce662b44 | 1279 | struct ieee80211_tx_info *info; |
55de908a | 1280 | struct ieee80211_chanctx_conf *chanctx_conf; |
af818581 | 1281 | |
ce662b44 JB |
1282 | if (qos) { |
1283 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | | |
1284 | IEEE80211_STYPE_QOS_NULLFUNC | | |
1285 | IEEE80211_FCTL_FROMDS); | |
1286 | } else { | |
1287 | size -= 2; | |
1288 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | | |
1289 | IEEE80211_STYPE_NULLFUNC | | |
1290 | IEEE80211_FCTL_FROMDS); | |
af818581 | 1291 | } |
af818581 | 1292 | |
ce662b44 JB |
1293 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + size); |
1294 | if (!skb) | |
1295 | return; | |
1296 | ||
1297 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
1298 | ||
1299 | nullfunc = (void *) skb_put(skb, size); | |
1300 | nullfunc->frame_control = fc; | |
1301 | nullfunc->duration_id = 0; | |
1302 | memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN); | |
1303 | memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); | |
1304 | memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN); | |
864a6040 | 1305 | nullfunc->seq_ctrl = 0; |
ce662b44 | 1306 | |
59b66255 JB |
1307 | skb->priority = tid; |
1308 | skb_set_queue_mapping(skb, ieee802_1d_to_ac[tid]); | |
ce662b44 | 1309 | if (qos) { |
ce662b44 JB |
1310 | nullfunc->qos_ctrl = cpu_to_le16(tid); |
1311 | ||
0ead2510 | 1312 | if (reason == IEEE80211_FRAME_RELEASE_UAPSD) { |
ce662b44 JB |
1313 | nullfunc->qos_ctrl |= |
1314 | cpu_to_le16(IEEE80211_QOS_CTL_EOSP); | |
0ead2510 EG |
1315 | if (more_data) |
1316 | nullfunc->frame_control |= | |
1317 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
1318 | } | |
ce662b44 JB |
1319 | } |
1320 | ||
1321 | info = IEEE80211_SKB_CB(skb); | |
1322 | ||
1323 | /* | |
1324 | * Tell TX path to send this frame even though the | |
1325 | * STA may still remain is PS mode after this frame | |
deeaee19 JB |
1326 | * exchange. Also set EOSP to indicate this packet |
1327 | * ends the poll/service period. | |
ce662b44 | 1328 | */ |
02f2f1a9 | 1329 | info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER | |
deeaee19 JB |
1330 | IEEE80211_TX_STATUS_EOSP | |
1331 | IEEE80211_TX_CTL_REQ_TX_STATUS; | |
ce662b44 | 1332 | |
6b127c71 SM |
1333 | info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE; |
1334 | ||
b77cf4f8 JB |
1335 | if (call_driver) |
1336 | drv_allow_buffered_frames(local, sta, BIT(tid), 1, | |
1337 | reason, false); | |
40b96408 | 1338 | |
89afe614 JB |
1339 | skb->dev = sdata->dev; |
1340 | ||
55de908a JB |
1341 | rcu_read_lock(); |
1342 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
1343 | if (WARN_ON(!chanctx_conf)) { | |
1344 | rcu_read_unlock(); | |
1345 | kfree_skb(skb); | |
1346 | return; | |
1347 | } | |
1348 | ||
73c4e195 | 1349 | info->band = chanctx_conf->def.chan->band; |
7c10770f | 1350 | ieee80211_xmit(sdata, sta, skb); |
55de908a | 1351 | rcu_read_unlock(); |
ce662b44 JB |
1352 | } |
1353 | ||
0a1cb809 JB |
1354 | static int find_highest_prio_tid(unsigned long tids) |
1355 | { | |
1356 | /* lower 3 TIDs aren't ordered perfectly */ | |
1357 | if (tids & 0xF8) | |
1358 | return fls(tids) - 1; | |
1359 | /* TID 0 is BE just like TID 3 */ | |
1360 | if (tids & BIT(0)) | |
1361 | return 0; | |
1362 | return fls(tids) - 1; | |
1363 | } | |
1364 | ||
0ead2510 EG |
1365 | /* Indicates if the MORE_DATA bit should be set in the last |
1366 | * frame obtained by ieee80211_sta_ps_get_frames. | |
1367 | * Note that driver_release_tids is relevant only if | |
1368 | * reason = IEEE80211_FRAME_RELEASE_PSPOLL | |
1369 | */ | |
1370 | static bool | |
1371 | ieee80211_sta_ps_more_data(struct sta_info *sta, u8 ignored_acs, | |
1372 | enum ieee80211_frame_release_type reason, | |
1373 | unsigned long driver_release_tids) | |
1374 | { | |
1375 | int ac; | |
1376 | ||
1377 | /* If the driver has data on more than one TID then | |
1378 | * certainly there's more data if we release just a | |
1379 | * single frame now (from a single TID). This will | |
1380 | * only happen for PS-Poll. | |
1381 | */ | |
1382 | if (reason == IEEE80211_FRAME_RELEASE_PSPOLL && | |
1383 | hweight16(driver_release_tids) > 1) | |
1384 | return true; | |
1385 | ||
1386 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { | |
1387 | if (ignored_acs & BIT(ac)) | |
1388 | continue; | |
1389 | ||
1390 | if (!skb_queue_empty(&sta->tx_filtered[ac]) || | |
1391 | !skb_queue_empty(&sta->ps_tx_buf[ac])) | |
1392 | return true; | |
1393 | } | |
1394 | ||
1395 | return false; | |
1396 | } | |
1397 | ||
47086fc5 | 1398 | static void |
0ead2510 EG |
1399 | ieee80211_sta_ps_get_frames(struct sta_info *sta, int n_frames, u8 ignored_acs, |
1400 | enum ieee80211_frame_release_type reason, | |
1401 | struct sk_buff_head *frames, | |
1402 | unsigned long *driver_release_tids) | |
af818581 JB |
1403 | { |
1404 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
1405 | struct ieee80211_local *local = sdata->local; | |
948d887d | 1406 | int ac; |
948d887d | 1407 | |
f9f760b4 | 1408 | /* Get response frame(s) and more data bit for the last one. */ |
948d887d | 1409 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { |
4049e09a JB |
1410 | unsigned long tids; |
1411 | ||
47086fc5 | 1412 | if (ignored_acs & BIT(ac)) |
948d887d JB |
1413 | continue; |
1414 | ||
4049e09a JB |
1415 | tids = ieee80211_tids_for_ac(ac); |
1416 | ||
f9f760b4 JB |
1417 | /* if we already have frames from software, then we can't also |
1418 | * release from hardware queues | |
1419 | */ | |
0ead2510 EG |
1420 | if (skb_queue_empty(frames)) { |
1421 | *driver_release_tids |= | |
1422 | sta->driver_buffered_tids & tids; | |
1423 | *driver_release_tids |= sta->txq_buffered_tids & tids; | |
ba8c3d6f | 1424 | } |
948d887d | 1425 | |
0ead2510 | 1426 | if (!*driver_release_tids) { |
f9f760b4 JB |
1427 | struct sk_buff *skb; |
1428 | ||
1429 | while (n_frames > 0) { | |
1430 | skb = skb_dequeue(&sta->tx_filtered[ac]); | |
1431 | if (!skb) { | |
1432 | skb = skb_dequeue( | |
1433 | &sta->ps_tx_buf[ac]); | |
1434 | if (skb) | |
1435 | local->total_ps_buffered--; | |
1436 | } | |
1437 | if (!skb) | |
1438 | break; | |
1439 | n_frames--; | |
0ead2510 | 1440 | __skb_queue_tail(frames, skb); |
f9f760b4 | 1441 | } |
4049e09a | 1442 | } |
948d887d | 1443 | |
0ead2510 EG |
1444 | /* If we have more frames buffered on this AC, then abort the |
1445 | * loop since we can't send more data from other ACs before | |
1446 | * the buffered frames from this. | |
f9f760b4 | 1447 | */ |
948d887d | 1448 | if (!skb_queue_empty(&sta->tx_filtered[ac]) || |
0ead2510 | 1449 | !skb_queue_empty(&sta->ps_tx_buf[ac])) |
948d887d | 1450 | break; |
af818581 | 1451 | } |
0ead2510 EG |
1452 | } |
1453 | ||
1454 | static void | |
1455 | ieee80211_sta_ps_deliver_response(struct sta_info *sta, | |
1456 | int n_frames, u8 ignored_acs, | |
1457 | enum ieee80211_frame_release_type reason) | |
1458 | { | |
1459 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
1460 | struct ieee80211_local *local = sdata->local; | |
1461 | unsigned long driver_release_tids = 0; | |
1462 | struct sk_buff_head frames; | |
1463 | bool more_data; | |
1464 | ||
1465 | /* Service or PS-Poll period starts */ | |
1466 | set_sta_flag(sta, WLAN_STA_SP); | |
1467 | ||
1468 | __skb_queue_head_init(&frames); | |
1469 | ||
1470 | ieee80211_sta_ps_get_frames(sta, n_frames, ignored_acs, reason, | |
1471 | &frames, &driver_release_tids); | |
1472 | ||
1473 | more_data = ieee80211_sta_ps_more_data(sta, ignored_acs, reason, driver_release_tids); | |
1474 | ||
1a57081a | 1475 | if (driver_release_tids && reason == IEEE80211_FRAME_RELEASE_PSPOLL) |
0ead2510 EG |
1476 | driver_release_tids = |
1477 | BIT(find_highest_prio_tid(driver_release_tids)); | |
af818581 | 1478 | |
f9f760b4 | 1479 | if (skb_queue_empty(&frames) && !driver_release_tids) { |
ce662b44 | 1480 | int tid; |
af818581 JB |
1481 | |
1482 | /* | |
ce662b44 JB |
1483 | * For PS-Poll, this can only happen due to a race condition |
1484 | * when we set the TIM bit and the station notices it, but | |
1485 | * before it can poll for the frame we expire it. | |
1486 | * | |
1487 | * For uAPSD, this is said in the standard (11.2.1.5 h): | |
1488 | * At each unscheduled SP for a non-AP STA, the AP shall | |
1489 | * attempt to transmit at least one MSDU or MMPDU, but no | |
1490 | * more than the value specified in the Max SP Length field | |
1491 | * in the QoS Capability element from delivery-enabled ACs, | |
1492 | * that are destined for the non-AP STA. | |
1493 | * | |
1494 | * Since we have no other MSDU/MMPDU, transmit a QoS null frame. | |
af818581 | 1495 | */ |
af818581 | 1496 | |
ce662b44 JB |
1497 | /* This will evaluate to 1, 3, 5 or 7. */ |
1498 | tid = 7 - ((ffs(~ignored_acs) - 1) << 1); | |
af818581 | 1499 | |
0ead2510 | 1500 | ieee80211_send_null_response(sta, tid, reason, true, false); |
f9f760b4 | 1501 | } else if (!driver_release_tids) { |
47086fc5 JB |
1502 | struct sk_buff_head pending; |
1503 | struct sk_buff *skb; | |
40b96408 JB |
1504 | int num = 0; |
1505 | u16 tids = 0; | |
b77cf4f8 | 1506 | bool need_null = false; |
af818581 | 1507 | |
47086fc5 | 1508 | skb_queue_head_init(&pending); |
af818581 | 1509 | |
47086fc5 JB |
1510 | while ((skb = __skb_dequeue(&frames))) { |
1511 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1512 | struct ieee80211_hdr *hdr = (void *) skb->data; | |
40b96408 JB |
1513 | u8 *qoshdr = NULL; |
1514 | ||
1515 | num++; | |
af818581 | 1516 | |
47086fc5 JB |
1517 | /* |
1518 | * Tell TX path to send this frame even though the | |
1519 | * STA may still remain is PS mode after this frame | |
1520 | * exchange. | |
1521 | */ | |
6b127c71 SM |
1522 | info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER; |
1523 | info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE; | |
47086fc5 JB |
1524 | |
1525 | /* | |
1526 | * Use MoreData flag to indicate whether there are | |
1527 | * more buffered frames for this STA | |
1528 | */ | |
24b9c373 | 1529 | if (more_data || !skb_queue_empty(&frames)) |
47086fc5 JB |
1530 | hdr->frame_control |= |
1531 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
24b9c373 JD |
1532 | else |
1533 | hdr->frame_control &= | |
1534 | cpu_to_le16(~IEEE80211_FCTL_MOREDATA); | |
47086fc5 | 1535 | |
40b96408 JB |
1536 | if (ieee80211_is_data_qos(hdr->frame_control) || |
1537 | ieee80211_is_qos_nullfunc(hdr->frame_control)) | |
1538 | qoshdr = ieee80211_get_qos_ctl(hdr); | |
1539 | ||
b77cf4f8 | 1540 | tids |= BIT(skb->priority); |
52a3f20c | 1541 | |
b77cf4f8 JB |
1542 | __skb_queue_tail(&pending, skb); |
1543 | ||
1544 | /* end service period after last frame or add one */ | |
1545 | if (!skb_queue_empty(&frames)) | |
1546 | continue; | |
1547 | ||
1548 | if (reason != IEEE80211_FRAME_RELEASE_UAPSD) { | |
1549 | /* for PS-Poll, there's only one frame */ | |
52a3f20c MP |
1550 | info->flags |= IEEE80211_TX_STATUS_EOSP | |
1551 | IEEE80211_TX_CTL_REQ_TX_STATUS; | |
b77cf4f8 | 1552 | break; |
52a3f20c | 1553 | } |
deeaee19 | 1554 | |
b77cf4f8 JB |
1555 | /* For uAPSD, things are a bit more complicated. If the |
1556 | * last frame has a QoS header (i.e. is a QoS-data or | |
1557 | * QoS-nulldata frame) then just set the EOSP bit there | |
1558 | * and be done. | |
1559 | * If the frame doesn't have a QoS header (which means | |
1560 | * it should be a bufferable MMPDU) then we can't set | |
1561 | * the EOSP bit in the QoS header; add a QoS-nulldata | |
1562 | * frame to the list to send it after the MMPDU. | |
1563 | * | |
1564 | * Note that this code is only in the mac80211-release | |
1565 | * code path, we assume that the driver will not buffer | |
1566 | * anything but QoS-data frames, or if it does, will | |
1567 | * create the QoS-nulldata frame by itself if needed. | |
1568 | * | |
1569 | * Cf. 802.11-2012 10.2.1.10 (c). | |
1570 | */ | |
1571 | if (qoshdr) { | |
1572 | *qoshdr |= IEEE80211_QOS_CTL_EOSP; | |
40b96408 | 1573 | |
b77cf4f8 JB |
1574 | info->flags |= IEEE80211_TX_STATUS_EOSP | |
1575 | IEEE80211_TX_CTL_REQ_TX_STATUS; | |
1576 | } else { | |
1577 | /* The standard isn't completely clear on this | |
1578 | * as it says the more-data bit should be set | |
1579 | * if there are more BUs. The QoS-Null frame | |
1580 | * we're about to send isn't buffered yet, we | |
1581 | * only create it below, but let's pretend it | |
1582 | * was buffered just in case some clients only | |
1583 | * expect more-data=0 when eosp=1. | |
1584 | */ | |
1585 | hdr->frame_control |= | |
1586 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
1587 | need_null = true; | |
1588 | num++; | |
1589 | } | |
1590 | break; | |
47086fc5 | 1591 | } |
af818581 | 1592 | |
40b96408 JB |
1593 | drv_allow_buffered_frames(local, sta, tids, num, |
1594 | reason, more_data); | |
1595 | ||
47086fc5 | 1596 | ieee80211_add_pending_skbs(local, &pending); |
af818581 | 1597 | |
b77cf4f8 JB |
1598 | if (need_null) |
1599 | ieee80211_send_null_response( | |
0ead2510 EG |
1600 | sta, find_highest_prio_tid(tids), |
1601 | reason, false, false); | |
b77cf4f8 | 1602 | |
c868cb35 | 1603 | sta_info_recalc_tim(sta); |
af818581 | 1604 | } else { |
ba8c3d6f FF |
1605 | unsigned long tids = sta->txq_buffered_tids & driver_release_tids; |
1606 | int tid; | |
1607 | ||
af818581 | 1608 | /* |
4049e09a JB |
1609 | * We need to release a frame that is buffered somewhere in the |
1610 | * driver ... it'll have to handle that. | |
f9f760b4 JB |
1611 | * Note that the driver also has to check the number of frames |
1612 | * on the TIDs we're releasing from - if there are more than | |
1613 | * n_frames it has to set the more-data bit (if we didn't ask | |
1614 | * it to set it anyway due to other buffered frames); if there | |
1615 | * are fewer than n_frames it has to make sure to adjust that | |
1616 | * to allow the service period to end properly. | |
4049e09a JB |
1617 | */ |
1618 | drv_release_buffered_frames(local, sta, driver_release_tids, | |
47086fc5 | 1619 | n_frames, reason, more_data); |
4049e09a JB |
1620 | |
1621 | /* | |
1622 | * Note that we don't recalculate the TIM bit here as it would | |
1623 | * most likely have no effect at all unless the driver told us | |
f9f760b4 | 1624 | * that the TID(s) became empty before returning here from the |
4049e09a | 1625 | * release function. |
f9f760b4 | 1626 | * Either way, however, when the driver tells us that the TID(s) |
ba8c3d6f FF |
1627 | * became empty or we find that a txq became empty, we'll do the |
1628 | * TIM recalculation. | |
af818581 | 1629 | */ |
ba8c3d6f FF |
1630 | |
1631 | if (!sta->sta.txq[0]) | |
1632 | return; | |
1633 | ||
1634 | for (tid = 0; tid < ARRAY_SIZE(sta->sta.txq); tid++) { | |
1635 | struct txq_info *txqi = to_txq_info(sta->sta.txq[tid]); | |
1636 | ||
1637 | if (!(tids & BIT(tid)) || skb_queue_len(&txqi->queue)) | |
1638 | continue; | |
1639 | ||
1640 | sta_info_recalc_tim(sta); | |
1641 | break; | |
1642 | } | |
af818581 JB |
1643 | } |
1644 | } | |
1645 | ||
47086fc5 JB |
1646 | void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta) |
1647 | { | |
1648 | u8 ignore_for_response = sta->sta.uapsd_queues; | |
1649 | ||
1650 | /* | |
1651 | * If all ACs are delivery-enabled then we should reply | |
1652 | * from any of them, if only some are enabled we reply | |
1653 | * only from the non-enabled ones. | |
1654 | */ | |
1655 | if (ignore_for_response == BIT(IEEE80211_NUM_ACS) - 1) | |
1656 | ignore_for_response = 0; | |
1657 | ||
1658 | ieee80211_sta_ps_deliver_response(sta, 1, ignore_for_response, | |
1659 | IEEE80211_FRAME_RELEASE_PSPOLL); | |
1660 | } | |
1661 | ||
1662 | void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta) | |
1663 | { | |
1664 | int n_frames = sta->sta.max_sp; | |
1665 | u8 delivery_enabled = sta->sta.uapsd_queues; | |
1666 | ||
1667 | /* | |
1668 | * If we ever grow support for TSPEC this might happen if | |
1669 | * the TSPEC update from hostapd comes in between a trigger | |
1670 | * frame setting WLAN_STA_UAPSD in the RX path and this | |
1671 | * actually getting called. | |
1672 | */ | |
1673 | if (!delivery_enabled) | |
1674 | return; | |
1675 | ||
47086fc5 JB |
1676 | switch (sta->sta.max_sp) { |
1677 | case 1: | |
1678 | n_frames = 2; | |
1679 | break; | |
1680 | case 2: | |
1681 | n_frames = 4; | |
1682 | break; | |
1683 | case 3: | |
1684 | n_frames = 6; | |
1685 | break; | |
1686 | case 0: | |
1687 | /* XXX: what is a good value? */ | |
13a8098a | 1688 | n_frames = 128; |
47086fc5 JB |
1689 | break; |
1690 | } | |
1691 | ||
1692 | ieee80211_sta_ps_deliver_response(sta, n_frames, ~delivery_enabled, | |
1693 | IEEE80211_FRAME_RELEASE_UAPSD); | |
1694 | } | |
1695 | ||
af818581 JB |
1696 | void ieee80211_sta_block_awake(struct ieee80211_hw *hw, |
1697 | struct ieee80211_sta *pubsta, bool block) | |
1698 | { | |
1699 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
1700 | ||
b5878a2d JB |
1701 | trace_api_sta_block_awake(sta->local, pubsta, block); |
1702 | ||
5ac2e350 | 1703 | if (block) { |
c2c98fde | 1704 | set_sta_flag(sta, WLAN_STA_PS_DRIVER); |
17c18bf8 | 1705 | ieee80211_clear_fast_xmit(sta); |
5ac2e350 JB |
1706 | return; |
1707 | } | |
1708 | ||
1709 | if (!test_sta_flag(sta, WLAN_STA_PS_DRIVER)) | |
1710 | return; | |
1711 | ||
1712 | if (!test_sta_flag(sta, WLAN_STA_PS_STA)) { | |
1713 | set_sta_flag(sta, WLAN_STA_PS_DELIVER); | |
1714 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); | |
1715 | ieee80211_queue_work(hw, &sta->drv_deliver_wk); | |
1716 | } else if (test_sta_flag(sta, WLAN_STA_PSPOLL) || | |
1717 | test_sta_flag(sta, WLAN_STA_UAPSD)) { | |
1718 | /* must be asleep in this case */ | |
1719 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); | |
1720 | ieee80211_queue_work(hw, &sta->drv_deliver_wk); | |
1721 | } else { | |
1722 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); | |
17c18bf8 | 1723 | ieee80211_check_fast_xmit(sta); |
5ac2e350 | 1724 | } |
af818581 JB |
1725 | } |
1726 | EXPORT_SYMBOL(ieee80211_sta_block_awake); | |
dcf55fb5 | 1727 | |
e943789e | 1728 | void ieee80211_sta_eosp(struct ieee80211_sta *pubsta) |
37fbd908 JB |
1729 | { |
1730 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
1731 | struct ieee80211_local *local = sta->local; | |
37fbd908 JB |
1732 | |
1733 | trace_api_eosp(local, pubsta); | |
1734 | ||
e943789e | 1735 | clear_sta_flag(sta, WLAN_STA_SP); |
37fbd908 | 1736 | } |
e943789e | 1737 | EXPORT_SYMBOL(ieee80211_sta_eosp); |
37fbd908 | 1738 | |
0ead2510 EG |
1739 | void ieee80211_send_eosp_nullfunc(struct ieee80211_sta *pubsta, int tid) |
1740 | { | |
1741 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
1742 | enum ieee80211_frame_release_type reason; | |
1743 | bool more_data; | |
1744 | ||
1745 | trace_api_send_eosp_nullfunc(sta->local, pubsta, tid); | |
1746 | ||
1747 | reason = IEEE80211_FRAME_RELEASE_UAPSD; | |
1748 | more_data = ieee80211_sta_ps_more_data(sta, ~sta->sta.uapsd_queues, | |
1749 | reason, 0); | |
1750 | ||
1751 | ieee80211_send_null_response(sta, tid, reason, false, more_data); | |
1752 | } | |
1753 | EXPORT_SYMBOL(ieee80211_send_eosp_nullfunc); | |
1754 | ||
042ec453 JB |
1755 | void ieee80211_sta_set_buffered(struct ieee80211_sta *pubsta, |
1756 | u8 tid, bool buffered) | |
dcf55fb5 FF |
1757 | { |
1758 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
1759 | ||
5a306f58 | 1760 | if (WARN_ON(tid >= IEEE80211_NUM_TIDS)) |
042ec453 JB |
1761 | return; |
1762 | ||
1b000789 JB |
1763 | trace_api_sta_set_buffered(sta->local, pubsta, tid, buffered); |
1764 | ||
948d887d JB |
1765 | if (buffered) |
1766 | set_bit(tid, &sta->driver_buffered_tids); | |
1767 | else | |
1768 | clear_bit(tid, &sta->driver_buffered_tids); | |
1769 | ||
c868cb35 | 1770 | sta_info_recalc_tim(sta); |
dcf55fb5 | 1771 | } |
042ec453 | 1772 | EXPORT_SYMBOL(ieee80211_sta_set_buffered); |
d9a7ddb0 | 1773 | |
52cfa1d6 AB |
1774 | static void |
1775 | ieee80211_recalc_p2p_go_ps_allowed(struct ieee80211_sub_if_data *sdata) | |
1776 | { | |
1777 | struct ieee80211_local *local = sdata->local; | |
1778 | bool allow_p2p_go_ps = sdata->vif.p2p; | |
1779 | struct sta_info *sta; | |
1780 | ||
1781 | rcu_read_lock(); | |
1782 | list_for_each_entry_rcu(sta, &local->sta_list, list) { | |
1783 | if (sdata != sta->sdata || | |
1784 | !test_sta_flag(sta, WLAN_STA_ASSOC)) | |
1785 | continue; | |
1786 | if (!sta->sta.support_p2p_ps) { | |
1787 | allow_p2p_go_ps = false; | |
1788 | break; | |
1789 | } | |
1790 | } | |
1791 | rcu_read_unlock(); | |
1792 | ||
1793 | if (allow_p2p_go_ps != sdata->vif.bss_conf.allow_p2p_go_ps) { | |
1794 | sdata->vif.bss_conf.allow_p2p_go_ps = allow_p2p_go_ps; | |
1795 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_P2P_PS); | |
1796 | } | |
1797 | } | |
1798 | ||
83d5cc01 JB |
1799 | int sta_info_move_state(struct sta_info *sta, |
1800 | enum ieee80211_sta_state new_state) | |
d9a7ddb0 | 1801 | { |
8bf11d8d | 1802 | might_sleep(); |
d9a7ddb0 JB |
1803 | |
1804 | if (sta->sta_state == new_state) | |
1805 | return 0; | |
1806 | ||
f09603a2 JB |
1807 | /* check allowed transitions first */ |
1808 | ||
1809 | switch (new_state) { | |
1810 | case IEEE80211_STA_NONE: | |
1811 | if (sta->sta_state != IEEE80211_STA_AUTH) | |
1812 | return -EINVAL; | |
1813 | break; | |
1814 | case IEEE80211_STA_AUTH: | |
1815 | if (sta->sta_state != IEEE80211_STA_NONE && | |
1816 | sta->sta_state != IEEE80211_STA_ASSOC) | |
1817 | return -EINVAL; | |
1818 | break; | |
1819 | case IEEE80211_STA_ASSOC: | |
1820 | if (sta->sta_state != IEEE80211_STA_AUTH && | |
1821 | sta->sta_state != IEEE80211_STA_AUTHORIZED) | |
1822 | return -EINVAL; | |
1823 | break; | |
1824 | case IEEE80211_STA_AUTHORIZED: | |
1825 | if (sta->sta_state != IEEE80211_STA_ASSOC) | |
1826 | return -EINVAL; | |
1827 | break; | |
1828 | default: | |
1829 | WARN(1, "invalid state %d", new_state); | |
1830 | return -EINVAL; | |
1831 | } | |
1832 | ||
bdcbd8e0 JB |
1833 | sta_dbg(sta->sdata, "moving STA %pM to state %d\n", |
1834 | sta->sta.addr, new_state); | |
f09603a2 JB |
1835 | |
1836 | /* | |
1837 | * notify the driver before the actual changes so it can | |
1838 | * fail the transition | |
1839 | */ | |
1840 | if (test_sta_flag(sta, WLAN_STA_INSERTED)) { | |
1841 | int err = drv_sta_state(sta->local, sta->sdata, sta, | |
1842 | sta->sta_state, new_state); | |
1843 | if (err) | |
1844 | return err; | |
1845 | } | |
1846 | ||
1847 | /* reflect the change in all state variables */ | |
1848 | ||
d9a7ddb0 JB |
1849 | switch (new_state) { |
1850 | case IEEE80211_STA_NONE: | |
1851 | if (sta->sta_state == IEEE80211_STA_AUTH) | |
1852 | clear_bit(WLAN_STA_AUTH, &sta->_flags); | |
d9a7ddb0 JB |
1853 | break; |
1854 | case IEEE80211_STA_AUTH: | |
a7201a6c | 1855 | if (sta->sta_state == IEEE80211_STA_NONE) { |
d9a7ddb0 | 1856 | set_bit(WLAN_STA_AUTH, &sta->_flags); |
a7201a6c | 1857 | } else if (sta->sta_state == IEEE80211_STA_ASSOC) { |
d9a7ddb0 | 1858 | clear_bit(WLAN_STA_ASSOC, &sta->_flags); |
a7201a6c | 1859 | ieee80211_recalc_min_chandef(sta->sdata); |
52cfa1d6 AB |
1860 | if (!sta->sta.support_p2p_ps) |
1861 | ieee80211_recalc_p2p_go_ps_allowed(sta->sdata); | |
a7201a6c | 1862 | } |
d9a7ddb0 JB |
1863 | break; |
1864 | case IEEE80211_STA_ASSOC: | |
29623892 | 1865 | if (sta->sta_state == IEEE80211_STA_AUTH) { |
d9a7ddb0 | 1866 | set_bit(WLAN_STA_ASSOC, &sta->_flags); |
a7201a6c | 1867 | ieee80211_recalc_min_chandef(sta->sdata); |
52cfa1d6 AB |
1868 | if (!sta->sta.support_p2p_ps) |
1869 | ieee80211_recalc_p2p_go_ps_allowed(sta->sdata); | |
29623892 | 1870 | } else if (sta->sta_state == IEEE80211_STA_AUTHORIZED) { |
7e3ed02c FF |
1871 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP || |
1872 | (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
1873 | !sta->sdata->u.vlan.sta)) | |
1874 | atomic_dec(&sta->sdata->bss->num_mcast_sta); | |
d9a7ddb0 | 1875 | clear_bit(WLAN_STA_AUTHORIZED, &sta->_flags); |
17c18bf8 | 1876 | ieee80211_clear_fast_xmit(sta); |
49ddf8e6 | 1877 | ieee80211_clear_fast_rx(sta); |
f09603a2 | 1878 | } |
d9a7ddb0 JB |
1879 | break; |
1880 | case IEEE80211_STA_AUTHORIZED: | |
29623892 | 1881 | if (sta->sta_state == IEEE80211_STA_ASSOC) { |
7e3ed02c FF |
1882 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP || |
1883 | (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
1884 | !sta->sdata->u.vlan.sta)) | |
1885 | atomic_inc(&sta->sdata->bss->num_mcast_sta); | |
d9a7ddb0 | 1886 | set_bit(WLAN_STA_AUTHORIZED, &sta->_flags); |
17c18bf8 | 1887 | ieee80211_check_fast_xmit(sta); |
49ddf8e6 | 1888 | ieee80211_check_fast_rx(sta); |
f09603a2 | 1889 | } |
d9a7ddb0 JB |
1890 | break; |
1891 | default: | |
f09603a2 | 1892 | break; |
d9a7ddb0 JB |
1893 | } |
1894 | ||
d9a7ddb0 JB |
1895 | sta->sta_state = new_state; |
1896 | ||
1897 | return 0; | |
1898 | } | |
687da132 EG |
1899 | |
1900 | u8 sta_info_tx_streams(struct sta_info *sta) | |
1901 | { | |
1902 | struct ieee80211_sta_ht_cap *ht_cap = &sta->sta.ht_cap; | |
1903 | u8 rx_streams; | |
1904 | ||
1905 | if (!sta->sta.ht_cap.ht_supported) | |
1906 | return 1; | |
1907 | ||
1908 | if (sta->sta.vht_cap.vht_supported) { | |
1909 | int i; | |
1910 | u16 tx_mcs_map = | |
1911 | le16_to_cpu(sta->sta.vht_cap.vht_mcs.tx_mcs_map); | |
1912 | ||
1913 | for (i = 7; i >= 0; i--) | |
1914 | if ((tx_mcs_map & (0x3 << (i * 2))) != | |
1915 | IEEE80211_VHT_MCS_NOT_SUPPORTED) | |
1916 | return i + 1; | |
1917 | } | |
1918 | ||
1919 | if (ht_cap->mcs.rx_mask[3]) | |
1920 | rx_streams = 4; | |
1921 | else if (ht_cap->mcs.rx_mask[2]) | |
1922 | rx_streams = 3; | |
1923 | else if (ht_cap->mcs.rx_mask[1]) | |
1924 | rx_streams = 2; | |
1925 | else | |
1926 | rx_streams = 1; | |
1927 | ||
1928 | if (!(ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_RX_DIFF)) | |
1929 | return rx_streams; | |
1930 | ||
1931 | return ((ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK) | |
1932 | >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT) + 1; | |
1933 | } | |
b7ffbd7e | 1934 | |
4f6b1b3d JB |
1935 | static void sta_stats_decode_rate(struct ieee80211_local *local, u16 rate, |
1936 | struct rate_info *rinfo) | |
fbd6ff5c | 1937 | { |
4f6b1b3d JB |
1938 | rinfo->bw = (rate & STA_STATS_RATE_BW_MASK) >> |
1939 | STA_STATS_RATE_BW_SHIFT; | |
1940 | ||
1941 | if (rate & STA_STATS_RATE_VHT) { | |
1942 | rinfo->flags = RATE_INFO_FLAGS_VHT_MCS; | |
1943 | rinfo->mcs = rate & 0xf; | |
1944 | rinfo->nss = (rate & 0xf0) >> 4; | |
1945 | } else if (rate & STA_STATS_RATE_HT) { | |
1946 | rinfo->flags = RATE_INFO_FLAGS_MCS; | |
1947 | rinfo->mcs = rate & 0xff; | |
1948 | } else if (rate & STA_STATS_RATE_LEGACY) { | |
fbd6ff5c | 1949 | struct ieee80211_supported_band *sband; |
fbd6ff5c | 1950 | u16 brate; |
4f6b1b3d JB |
1951 | unsigned int shift; |
1952 | ||
1953 | sband = local->hw.wiphy->bands[(rate >> 4) & 0xf]; | |
1954 | brate = sband->bitrates[rate & 0xf].bitrate; | |
1955 | if (rinfo->bw == RATE_INFO_BW_5) | |
1956 | shift = 2; | |
1957 | else if (rinfo->bw == RATE_INFO_BW_10) | |
1958 | shift = 1; | |
1959 | else | |
1960 | shift = 0; | |
fbd6ff5c JB |
1961 | rinfo->legacy = DIV_ROUND_UP(brate, 1 << shift); |
1962 | } | |
1963 | ||
4f6b1b3d | 1964 | if (rate & STA_STATS_RATE_SGI) |
fbd6ff5c | 1965 | rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI; |
4f6b1b3d JB |
1966 | } |
1967 | ||
1968 | static void sta_set_rate_info_rx(struct sta_info *sta, struct rate_info *rinfo) | |
1969 | { | |
1970 | u16 rate = ACCESS_ONCE(sta->rx_stats.last_rate); | |
fbd6ff5c | 1971 | |
4f6b1b3d JB |
1972 | if (rate == STA_STATS_RATE_INVALID) |
1973 | rinfo->flags = 0; | |
fbd6ff5c | 1974 | else |
4f6b1b3d | 1975 | sta_stats_decode_rate(sta->local, rate, rinfo); |
fbd6ff5c JB |
1976 | } |
1977 | ||
0f9c5a61 JB |
1978 | static void sta_set_tidstats(struct sta_info *sta, |
1979 | struct cfg80211_tid_stats *tidstats, | |
1980 | int tid) | |
1981 | { | |
1982 | struct ieee80211_local *local = sta->local; | |
1983 | ||
1984 | if (!(tidstats->filled & BIT(NL80211_TID_STATS_RX_MSDU))) { | |
1985 | unsigned int start; | |
1986 | ||
1987 | do { | |
1988 | start = u64_stats_fetch_begin(&sta->rx_stats.syncp); | |
1989 | tidstats->rx_msdu = sta->rx_stats.msdu[tid]; | |
1990 | } while (u64_stats_fetch_retry(&sta->rx_stats.syncp, start)); | |
1991 | ||
1992 | tidstats->filled |= BIT(NL80211_TID_STATS_RX_MSDU); | |
1993 | } | |
1994 | ||
1995 | if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU))) { | |
1996 | tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU); | |
1997 | tidstats->tx_msdu = sta->tx_stats.msdu[tid]; | |
1998 | } | |
1999 | ||
2000 | if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU_RETRIES)) && | |
2001 | ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { | |
2002 | tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU_RETRIES); | |
2003 | tidstats->tx_msdu_retries = sta->status_stats.msdu_retries[tid]; | |
2004 | } | |
2005 | ||
2006 | if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU_FAILED)) && | |
2007 | ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { | |
2008 | tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU_FAILED); | |
2009 | tidstats->tx_msdu_failed = sta->status_stats.msdu_failed[tid]; | |
2010 | } | |
2011 | } | |
2012 | ||
b7ffbd7e JB |
2013 | void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo) |
2014 | { | |
2015 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
2016 | struct ieee80211_local *local = sdata->local; | |
9a244409 | 2017 | struct rate_control_ref *ref = NULL; |
b7ffbd7e JB |
2018 | u32 thr = 0; |
2019 | int i, ac; | |
2020 | ||
9a244409 JL |
2021 | if (test_sta_flag(sta, WLAN_STA_RATE_CONTROL)) |
2022 | ref = local->rate_ctrl; | |
2023 | ||
b7ffbd7e JB |
2024 | sinfo->generation = sdata->local->sta_generation; |
2025 | ||
225b8189 JB |
2026 | /* do before driver, so beacon filtering drivers have a |
2027 | * chance to e.g. just add the number of filtered beacons | |
2028 | * (or just modify the value entirely, of course) | |
2029 | */ | |
2030 | if (sdata->vif.type == NL80211_IFTYPE_STATION) | |
2031 | sinfo->rx_beacon = sdata->u.mgd.count_beacon_signal; | |
2032 | ||
2b9a7e1b JB |
2033 | drv_sta_statistics(local, sdata, &sta->sta, sinfo); |
2034 | ||
319090bf JB |
2035 | sinfo->filled |= BIT(NL80211_STA_INFO_INACTIVE_TIME) | |
2036 | BIT(NL80211_STA_INFO_STA_FLAGS) | | |
2037 | BIT(NL80211_STA_INFO_BSS_PARAM) | | |
2038 | BIT(NL80211_STA_INFO_CONNECTED_TIME) | | |
976bd9ef JB |
2039 | BIT(NL80211_STA_INFO_RX_DROP_MISC); |
2040 | ||
2041 | if (sdata->vif.type == NL80211_IFTYPE_STATION) { | |
2042 | sinfo->beacon_loss_count = sdata->u.mgd.beacon_loss_count; | |
2043 | sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_LOSS); | |
2044 | } | |
b7ffbd7e | 2045 | |
84b00607 | 2046 | sinfo->connected_time = ktime_get_seconds() - sta->last_connected; |
e5a9f8d0 | 2047 | sinfo->inactive_time = |
b8da6b6a | 2048 | jiffies_to_msecs(jiffies - ieee80211_sta_last_active(sta)); |
2b9a7e1b | 2049 | |
319090bf JB |
2050 | if (!(sinfo->filled & (BIT(NL80211_STA_INFO_TX_BYTES64) | |
2051 | BIT(NL80211_STA_INFO_TX_BYTES)))) { | |
2b9a7e1b JB |
2052 | sinfo->tx_bytes = 0; |
2053 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) | |
e5a9f8d0 | 2054 | sinfo->tx_bytes += sta->tx_stats.bytes[ac]; |
319090bf | 2055 | sinfo->filled |= BIT(NL80211_STA_INFO_TX_BYTES64); |
2b9a7e1b JB |
2056 | } |
2057 | ||
319090bf | 2058 | if (!(sinfo->filled & BIT(NL80211_STA_INFO_TX_PACKETS))) { |
2b9a7e1b JB |
2059 | sinfo->tx_packets = 0; |
2060 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) | |
e5a9f8d0 | 2061 | sinfo->tx_packets += sta->tx_stats.packets[ac]; |
319090bf | 2062 | sinfo->filled |= BIT(NL80211_STA_INFO_TX_PACKETS); |
2b9a7e1b JB |
2063 | } |
2064 | ||
319090bf JB |
2065 | if (!(sinfo->filled & (BIT(NL80211_STA_INFO_RX_BYTES64) | |
2066 | BIT(NL80211_STA_INFO_RX_BYTES)))) { | |
0f9c5a61 JB |
2067 | unsigned int start; |
2068 | ||
2069 | do { | |
2070 | start = u64_stats_fetch_begin(&sta->rx_stats.syncp); | |
2071 | sinfo->rx_bytes = sta->rx_stats.bytes; | |
2072 | } while (u64_stats_fetch_retry(&sta->rx_stats.syncp, start)); | |
319090bf | 2073 | sinfo->filled |= BIT(NL80211_STA_INFO_RX_BYTES64); |
2b9a7e1b JB |
2074 | } |
2075 | ||
319090bf | 2076 | if (!(sinfo->filled & BIT(NL80211_STA_INFO_RX_PACKETS))) { |
e5a9f8d0 | 2077 | sinfo->rx_packets = sta->rx_stats.packets; |
319090bf | 2078 | sinfo->filled |= BIT(NL80211_STA_INFO_RX_PACKETS); |
2b9a7e1b JB |
2079 | } |
2080 | ||
319090bf | 2081 | if (!(sinfo->filled & BIT(NL80211_STA_INFO_TX_RETRIES))) { |
e5a9f8d0 | 2082 | sinfo->tx_retries = sta->status_stats.retry_count; |
319090bf | 2083 | sinfo->filled |= BIT(NL80211_STA_INFO_TX_RETRIES); |
2b9a7e1b JB |
2084 | } |
2085 | ||
319090bf | 2086 | if (!(sinfo->filled & BIT(NL80211_STA_INFO_TX_FAILED))) { |
e5a9f8d0 | 2087 | sinfo->tx_failed = sta->status_stats.retry_failed; |
319090bf | 2088 | sinfo->filled |= BIT(NL80211_STA_INFO_TX_FAILED); |
b7ffbd7e | 2089 | } |
2b9a7e1b | 2090 | |
e5a9f8d0 | 2091 | sinfo->rx_dropped_misc = sta->rx_stats.dropped; |
b7ffbd7e | 2092 | |
225b8189 JB |
2093 | if (sdata->vif.type == NL80211_IFTYPE_STATION && |
2094 | !(sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)) { | |
2095 | sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_RX) | | |
2096 | BIT(NL80211_STA_INFO_BEACON_SIGNAL_AVG); | |
2097 | sinfo->rx_beacon_signal_avg = ieee80211_ave_rssi(&sdata->vif); | |
2098 | } | |
2099 | ||
30686bf7 JB |
2100 | if (ieee80211_hw_check(&sta->local->hw, SIGNAL_DBM) || |
2101 | ieee80211_hw_check(&sta->local->hw, SIGNAL_UNSPEC)) { | |
319090bf | 2102 | if (!(sinfo->filled & BIT(NL80211_STA_INFO_SIGNAL))) { |
e5a9f8d0 | 2103 | sinfo->signal = (s8)sta->rx_stats.last_signal; |
319090bf | 2104 | sinfo->filled |= BIT(NL80211_STA_INFO_SIGNAL); |
2b9a7e1b JB |
2105 | } |
2106 | ||
319090bf | 2107 | if (!(sinfo->filled & BIT(NL80211_STA_INFO_SIGNAL_AVG))) { |
40d9a38a | 2108 | sinfo->signal_avg = |
0be6ed13 | 2109 | -ewma_signal_read(&sta->rx_stats_avg.signal); |
319090bf | 2110 | sinfo->filled |= BIT(NL80211_STA_INFO_SIGNAL_AVG); |
2b9a7e1b | 2111 | } |
b7ffbd7e | 2112 | } |
2b9a7e1b | 2113 | |
e5a9f8d0 | 2114 | if (sta->rx_stats.chains && |
319090bf JB |
2115 | !(sinfo->filled & (BIT(NL80211_STA_INFO_CHAIN_SIGNAL) | |
2116 | BIT(NL80211_STA_INFO_CHAIN_SIGNAL_AVG)))) { | |
2117 | sinfo->filled |= BIT(NL80211_STA_INFO_CHAIN_SIGNAL) | | |
2118 | BIT(NL80211_STA_INFO_CHAIN_SIGNAL_AVG); | |
b7ffbd7e | 2119 | |
e5a9f8d0 | 2120 | sinfo->chains = sta->rx_stats.chains; |
b7ffbd7e | 2121 | for (i = 0; i < ARRAY_SIZE(sinfo->chain_signal); i++) { |
e5a9f8d0 JB |
2122 | sinfo->chain_signal[i] = |
2123 | sta->rx_stats.chain_signal_last[i]; | |
b7ffbd7e | 2124 | sinfo->chain_signal_avg[i] = |
0be6ed13 | 2125 | -ewma_signal_read(&sta->rx_stats_avg.chain_signal[i]); |
b7ffbd7e JB |
2126 | } |
2127 | } | |
2128 | ||
319090bf | 2129 | if (!(sinfo->filled & BIT(NL80211_STA_INFO_TX_BITRATE))) { |
e5a9f8d0 JB |
2130 | sta_set_rate_info_tx(sta, &sta->tx_stats.last_rate, |
2131 | &sinfo->txrate); | |
319090bf | 2132 | sinfo->filled |= BIT(NL80211_STA_INFO_TX_BITRATE); |
2b9a7e1b JB |
2133 | } |
2134 | ||
319090bf | 2135 | if (!(sinfo->filled & BIT(NL80211_STA_INFO_RX_BITRATE))) { |
2b9a7e1b | 2136 | sta_set_rate_info_rx(sta, &sinfo->rxrate); |
319090bf | 2137 | sinfo->filled |= BIT(NL80211_STA_INFO_RX_BITRATE); |
2b9a7e1b | 2138 | } |
b7ffbd7e | 2139 | |
79c892b8 JB |
2140 | sinfo->filled |= BIT(NL80211_STA_INFO_TID_STATS); |
2141 | for (i = 0; i < IEEE80211_NUM_TIDS + 1; i++) { | |
2142 | struct cfg80211_tid_stats *tidstats = &sinfo->pertid[i]; | |
2143 | ||
0f9c5a61 | 2144 | sta_set_tidstats(sta, tidstats, i); |
79c892b8 JB |
2145 | } |
2146 | ||
b7ffbd7e JB |
2147 | if (ieee80211_vif_is_mesh(&sdata->vif)) { |
2148 | #ifdef CONFIG_MAC80211_MESH | |
319090bf JB |
2149 | sinfo->filled |= BIT(NL80211_STA_INFO_LLID) | |
2150 | BIT(NL80211_STA_INFO_PLID) | | |
2151 | BIT(NL80211_STA_INFO_PLINK_STATE) | | |
2152 | BIT(NL80211_STA_INFO_LOCAL_PM) | | |
2153 | BIT(NL80211_STA_INFO_PEER_PM) | | |
2154 | BIT(NL80211_STA_INFO_NONPEER_PM); | |
b7ffbd7e | 2155 | |
433f5bc1 JB |
2156 | sinfo->llid = sta->mesh->llid; |
2157 | sinfo->plid = sta->mesh->plid; | |
2158 | sinfo->plink_state = sta->mesh->plink_state; | |
b7ffbd7e | 2159 | if (test_sta_flag(sta, WLAN_STA_TOFFSET_KNOWN)) { |
319090bf | 2160 | sinfo->filled |= BIT(NL80211_STA_INFO_T_OFFSET); |
433f5bc1 | 2161 | sinfo->t_offset = sta->mesh->t_offset; |
b7ffbd7e | 2162 | } |
433f5bc1 JB |
2163 | sinfo->local_pm = sta->mesh->local_pm; |
2164 | sinfo->peer_pm = sta->mesh->peer_pm; | |
2165 | sinfo->nonpeer_pm = sta->mesh->nonpeer_pm; | |
b7ffbd7e JB |
2166 | #endif |
2167 | } | |
2168 | ||
2169 | sinfo->bss_param.flags = 0; | |
2170 | if (sdata->vif.bss_conf.use_cts_prot) | |
2171 | sinfo->bss_param.flags |= BSS_PARAM_FLAGS_CTS_PROT; | |
2172 | if (sdata->vif.bss_conf.use_short_preamble) | |
2173 | sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_PREAMBLE; | |
2174 | if (sdata->vif.bss_conf.use_short_slot) | |
2175 | sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_SLOT_TIME; | |
785e21a8 | 2176 | sinfo->bss_param.dtim_period = sdata->vif.bss_conf.dtim_period; |
b7ffbd7e JB |
2177 | sinfo->bss_param.beacon_interval = sdata->vif.bss_conf.beacon_int; |
2178 | ||
2179 | sinfo->sta_flags.set = 0; | |
2180 | sinfo->sta_flags.mask = BIT(NL80211_STA_FLAG_AUTHORIZED) | | |
2181 | BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) | | |
2182 | BIT(NL80211_STA_FLAG_WME) | | |
2183 | BIT(NL80211_STA_FLAG_MFP) | | |
2184 | BIT(NL80211_STA_FLAG_AUTHENTICATED) | | |
2185 | BIT(NL80211_STA_FLAG_ASSOCIATED) | | |
2186 | BIT(NL80211_STA_FLAG_TDLS_PEER); | |
2187 | if (test_sta_flag(sta, WLAN_STA_AUTHORIZED)) | |
2188 | sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHORIZED); | |
2189 | if (test_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE)) | |
2190 | sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE); | |
a74a8c84 | 2191 | if (sta->sta.wme) |
b7ffbd7e JB |
2192 | sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_WME); |
2193 | if (test_sta_flag(sta, WLAN_STA_MFP)) | |
2194 | sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_MFP); | |
2195 | if (test_sta_flag(sta, WLAN_STA_AUTH)) | |
2196 | sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHENTICATED); | |
2197 | if (test_sta_flag(sta, WLAN_STA_ASSOC)) | |
2198 | sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_ASSOCIATED); | |
2199 | if (test_sta_flag(sta, WLAN_STA_TDLS_PEER)) | |
2200 | sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_TDLS_PEER); | |
2201 | ||
2202 | /* check if the driver has a SW RC implementation */ | |
2203 | if (ref && ref->ops->get_expected_throughput) | |
2204 | thr = ref->ops->get_expected_throughput(sta->rate_ctrl_priv); | |
2205 | else | |
2206 | thr = drv_get_expected_throughput(local, &sta->sta); | |
2207 | ||
2208 | if (thr != 0) { | |
319090bf | 2209 | sinfo->filled |= BIT(NL80211_STA_INFO_EXPECTED_THROUGHPUT); |
b7ffbd7e JB |
2210 | sinfo->expected_throughput = thr; |
2211 | } | |
2212 | } | |
b8da6b6a JB |
2213 | |
2214 | unsigned long ieee80211_sta_last_active(struct sta_info *sta) | |
2215 | { | |
2216 | if (time_after(sta->rx_stats.last_rx, sta->status_stats.last_ack)) | |
2217 | return sta->rx_stats.last_rx; | |
2218 | return sta->status_stats.last_ack; | |
2219 | } |