Commit | Line | Data |
---|---|---|
f0706e82 JB |
1 | /* |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License version 2 as | |
7 | * published by the Free Software Foundation. | |
8 | */ | |
9 | ||
10 | #include <linux/module.h> | |
11 | #include <linux/init.h> | |
888d04df | 12 | #include <linux/etherdevice.h> |
f0706e82 JB |
13 | #include <linux/netdevice.h> |
14 | #include <linux/types.h> | |
15 | #include <linux/slab.h> | |
16 | #include <linux/skbuff.h> | |
17 | #include <linux/if_arp.h> | |
0d174406 | 18 | #include <linux/timer.h> |
d0709a65 | 19 | #include <linux/rtnetlink.h> |
f0706e82 JB |
20 | |
21 | #include <net/mac80211.h> | |
22 | #include "ieee80211_i.h" | |
24487981 | 23 | #include "driver-ops.h" |
2c8dccc7 | 24 | #include "rate.h" |
f0706e82 | 25 | #include "sta_info.h" |
e9f207f0 | 26 | #include "debugfs_sta.h" |
ee385855 | 27 | #include "mesh.h" |
ce662b44 | 28 | #include "wme.h" |
f0706e82 | 29 | |
d0709a65 JB |
30 | /** |
31 | * DOC: STA information lifetime rules | |
32 | * | |
33 | * STA info structures (&struct sta_info) are managed in a hash table | |
34 | * for faster lookup and a list for iteration. They are managed using | |
35 | * RCU, i.e. access to the list and hash table is protected by RCU. | |
36 | * | |
34e89507 JB |
37 | * Upon allocating a STA info structure with sta_info_alloc(), the caller |
38 | * owns that structure. It must then insert it into the hash table using | |
39 | * either sta_info_insert() or sta_info_insert_rcu(); only in the latter | |
40 | * case (which acquires an rcu read section but must not be called from | |
41 | * within one) will the pointer still be valid after the call. Note that | |
42 | * the caller may not do much with the STA info before inserting it, in | |
43 | * particular, it may not start any mesh peer link management or add | |
44 | * encryption keys. | |
93e5deb1 JB |
45 | * |
46 | * When the insertion fails (sta_info_insert()) returns non-zero), the | |
47 | * structure will have been freed by sta_info_insert()! | |
d0709a65 | 48 | * |
34e89507 | 49 | * Station entries are added by mac80211 when you establish a link with a |
7e189a12 LR |
50 | * peer. This means different things for the different type of interfaces |
51 | * we support. For a regular station this mean we add the AP sta when we | |
25985edc | 52 | * receive an association response from the AP. For IBSS this occurs when |
34e89507 | 53 | * get to know about a peer on the same IBSS. For WDS we add the sta for |
25985edc | 54 | * the peer immediately upon device open. When using AP mode we add stations |
34e89507 | 55 | * for each respective station upon request from userspace through nl80211. |
7e189a12 | 56 | * |
34e89507 JB |
57 | * In order to remove a STA info structure, various sta_info_destroy_*() |
58 | * calls are available. | |
d0709a65 | 59 | * |
34e89507 JB |
60 | * There is no concept of ownership on a STA entry, each structure is |
61 | * owned by the global hash table/list until it is removed. All users of | |
62 | * the structure need to be RCU protected so that the structure won't be | |
63 | * freed before they are done using it. | |
d0709a65 | 64 | */ |
f0706e82 | 65 | |
4d33960b | 66 | /* Caller must hold local->sta_mtx */ |
be8755e1 MW |
67 | static int sta_info_hash_del(struct ieee80211_local *local, |
68 | struct sta_info *sta) | |
f0706e82 JB |
69 | { |
70 | struct sta_info *s; | |
71 | ||
40b275b6 | 72 | s = rcu_dereference_protected(local->sta_hash[STA_HASH(sta->sta.addr)], |
4d33960b | 73 | lockdep_is_held(&local->sta_mtx)); |
f0706e82 | 74 | if (!s) |
be8755e1 MW |
75 | return -ENOENT; |
76 | if (s == sta) { | |
cf778b00 | 77 | rcu_assign_pointer(local->sta_hash[STA_HASH(sta->sta.addr)], |
d0709a65 | 78 | s->hnext); |
be8755e1 | 79 | return 0; |
f0706e82 JB |
80 | } |
81 | ||
40b275b6 JB |
82 | while (rcu_access_pointer(s->hnext) && |
83 | rcu_access_pointer(s->hnext) != sta) | |
84 | s = rcu_dereference_protected(s->hnext, | |
4d33960b | 85 | lockdep_is_held(&local->sta_mtx)); |
40b275b6 | 86 | if (rcu_access_pointer(s->hnext)) { |
cf778b00 | 87 | rcu_assign_pointer(s->hnext, sta->hnext); |
be8755e1 MW |
88 | return 0; |
89 | } | |
f0706e82 | 90 | |
be8755e1 | 91 | return -ENOENT; |
f0706e82 JB |
92 | } |
93 | ||
97f97b1f | 94 | static void cleanup_single_sta(struct sta_info *sta) |
b22cfcfc | 95 | { |
b22cfcfc EP |
96 | int ac, i; |
97 | struct tid_ampdu_tx *tid_tx; | |
98 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
99 | struct ieee80211_local *local = sdata->local; | |
d012a605 | 100 | struct ps_data *ps; |
b22cfcfc | 101 | |
b22cfcfc | 102 | if (test_sta_flag(sta, WLAN_STA_PS_STA)) { |
d012a605 MP |
103 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP || |
104 | sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
105 | ps = &sdata->bss->ps; | |
3f52b7e3 MP |
106 | else if (ieee80211_vif_is_mesh(&sdata->vif)) |
107 | ps = &sdata->u.mesh.ps; | |
d012a605 MP |
108 | else |
109 | return; | |
b22cfcfc EP |
110 | |
111 | clear_sta_flag(sta, WLAN_STA_PS_STA); | |
112 | ||
d012a605 | 113 | atomic_dec(&ps->num_sta_ps); |
b22cfcfc EP |
114 | sta_info_recalc_tim(sta); |
115 | } | |
116 | ||
117 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { | |
118 | local->total_ps_buffered -= skb_queue_len(&sta->ps_tx_buf[ac]); | |
1f98ab7f FF |
119 | ieee80211_purge_tx_queue(&local->hw, &sta->ps_tx_buf[ac]); |
120 | ieee80211_purge_tx_queue(&local->hw, &sta->tx_filtered[ac]); | |
b22cfcfc EP |
121 | } |
122 | ||
45b5028e TP |
123 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
124 | mesh_sta_cleanup(sta); | |
b22cfcfc EP |
125 | |
126 | cancel_work_sync(&sta->drv_unblock_wk); | |
127 | ||
128 | /* | |
129 | * Destroy aggregation state here. It would be nice to wait for the | |
130 | * driver to finish aggregation stop and then clean up, but for now | |
131 | * drivers have to handle aggregation stop being requested, followed | |
132 | * directly by station destruction. | |
133 | */ | |
5a306f58 | 134 | for (i = 0; i < IEEE80211_NUM_TIDS; i++) { |
661eb381 | 135 | kfree(sta->ampdu_mlme.tid_start_tx[i]); |
b22cfcfc EP |
136 | tid_tx = rcu_dereference_raw(sta->ampdu_mlme.tid_tx[i]); |
137 | if (!tid_tx) | |
138 | continue; | |
1f98ab7f | 139 | ieee80211_purge_tx_queue(&local->hw, &tid_tx->pending); |
b22cfcfc EP |
140 | kfree(tid_tx); |
141 | } | |
142 | ||
143 | sta_info_free(local, sta); | |
144 | } | |
145 | ||
d0709a65 | 146 | /* protected by RCU */ |
abe60632 JB |
147 | struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata, |
148 | const u8 *addr) | |
f0706e82 | 149 | { |
abe60632 | 150 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
151 | struct sta_info *sta; |
152 | ||
0379185b | 153 | sta = rcu_dereference_check(local->sta_hash[STA_HASH(addr)], |
0379185b | 154 | lockdep_is_held(&local->sta_mtx)); |
f0706e82 | 155 | while (sta) { |
abe60632 | 156 | if (sta->sdata == sdata && |
b203ca39 | 157 | ether_addr_equal(sta->sta.addr, addr)) |
f0706e82 | 158 | break; |
0379185b | 159 | sta = rcu_dereference_check(sta->hnext, |
0379185b | 160 | lockdep_is_held(&local->sta_mtx)); |
f0706e82 | 161 | } |
43ba7e95 JB |
162 | return sta; |
163 | } | |
164 | ||
0e5ded5a FF |
165 | /* |
166 | * Get sta info either from the specified interface | |
167 | * or from one of its vlans | |
168 | */ | |
169 | struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata, | |
170 | const u8 *addr) | |
171 | { | |
172 | struct ieee80211_local *local = sdata->local; | |
173 | struct sta_info *sta; | |
174 | ||
0379185b | 175 | sta = rcu_dereference_check(local->sta_hash[STA_HASH(addr)], |
0379185b | 176 | lockdep_is_held(&local->sta_mtx)); |
0e5ded5a FF |
177 | while (sta) { |
178 | if ((sta->sdata == sdata || | |
a2c1e3da | 179 | (sta->sdata->bss && sta->sdata->bss == sdata->bss)) && |
b203ca39 | 180 | ether_addr_equal(sta->sta.addr, addr)) |
0e5ded5a | 181 | break; |
0379185b | 182 | sta = rcu_dereference_check(sta->hnext, |
0379185b | 183 | lockdep_is_held(&local->sta_mtx)); |
0e5ded5a FF |
184 | } |
185 | return sta; | |
186 | } | |
187 | ||
3b53fde8 JB |
188 | struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata, |
189 | int idx) | |
ee385855 | 190 | { |
3b53fde8 | 191 | struct ieee80211_local *local = sdata->local; |
ee385855 LCC |
192 | struct sta_info *sta; |
193 | int i = 0; | |
194 | ||
d0709a65 | 195 | list_for_each_entry_rcu(sta, &local->sta_list, list) { |
3b53fde8 | 196 | if (sdata != sta->sdata) |
2a8ca29a | 197 | continue; |
ee385855 LCC |
198 | if (i < idx) { |
199 | ++i; | |
200 | continue; | |
ee385855 | 201 | } |
2a8ca29a | 202 | return sta; |
ee385855 | 203 | } |
ee385855 LCC |
204 | |
205 | return NULL; | |
206 | } | |
f0706e82 | 207 | |
93e5deb1 | 208 | /** |
d9a7ddb0 | 209 | * sta_info_free - free STA |
93e5deb1 | 210 | * |
6ef307bc | 211 | * @local: pointer to the global information |
93e5deb1 JB |
212 | * @sta: STA info to free |
213 | * | |
214 | * This function must undo everything done by sta_info_alloc() | |
d9a7ddb0 JB |
215 | * that may happen before sta_info_insert(). It may only be |
216 | * called when sta_info_insert() has not been attempted (and | |
217 | * if that fails, the station is freed anyway.) | |
93e5deb1 | 218 | */ |
d9a7ddb0 | 219 | void sta_info_free(struct ieee80211_local *local, struct sta_info *sta) |
93e5deb1 | 220 | { |
ad38bfc9 MG |
221 | int i; |
222 | ||
889cbb91 | 223 | if (sta->rate_ctrl) |
af65cd96 | 224 | rate_control_free_sta(sta); |
93e5deb1 | 225 | |
ad38bfc9 MG |
226 | if (sta->tx_lat) { |
227 | for (i = 0; i < IEEE80211_NUM_TIDS; i++) | |
228 | kfree(sta->tx_lat[i].bins); | |
229 | kfree(sta->tx_lat); | |
230 | } | |
231 | ||
bdcbd8e0 | 232 | sta_dbg(sta->sdata, "Destroyed STA %pM\n", sta->sta.addr); |
93e5deb1 JB |
233 | |
234 | kfree(sta); | |
235 | } | |
236 | ||
4d33960b | 237 | /* Caller must hold local->sta_mtx */ |
d0709a65 JB |
238 | static void sta_info_hash_add(struct ieee80211_local *local, |
239 | struct sta_info *sta) | |
f0706e82 | 240 | { |
4d33960b | 241 | lockdep_assert_held(&local->sta_mtx); |
17741cdc | 242 | sta->hnext = local->sta_hash[STA_HASH(sta->sta.addr)]; |
cf778b00 | 243 | rcu_assign_pointer(local->sta_hash[STA_HASH(sta->sta.addr)], sta); |
f0706e82 | 244 | } |
f0706e82 | 245 | |
af818581 JB |
246 | static void sta_unblock(struct work_struct *wk) |
247 | { | |
248 | struct sta_info *sta; | |
249 | ||
250 | sta = container_of(wk, struct sta_info, drv_unblock_wk); | |
251 | ||
252 | if (sta->dead) | |
253 | return; | |
254 | ||
54420473 HS |
255 | if (!test_sta_flag(sta, WLAN_STA_PS_STA)) { |
256 | local_bh_disable(); | |
af818581 | 257 | ieee80211_sta_ps_deliver_wakeup(sta); |
54420473 HS |
258 | local_bh_enable(); |
259 | } else if (test_and_clear_sta_flag(sta, WLAN_STA_PSPOLL)) { | |
c2c98fde | 260 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); |
ce662b44 JB |
261 | |
262 | local_bh_disable(); | |
af818581 | 263 | ieee80211_sta_ps_deliver_poll_response(sta); |
ce662b44 | 264 | local_bh_enable(); |
c2c98fde JB |
265 | } else if (test_and_clear_sta_flag(sta, WLAN_STA_UAPSD)) { |
266 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); | |
ce662b44 JB |
267 | |
268 | local_bh_disable(); | |
47086fc5 | 269 | ieee80211_sta_ps_deliver_uapsd(sta); |
ce662b44 | 270 | local_bh_enable(); |
50a9432d | 271 | } else |
c2c98fde | 272 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); |
af818581 JB |
273 | } |
274 | ||
af65cd96 JB |
275 | static int sta_prepare_rate_control(struct ieee80211_local *local, |
276 | struct sta_info *sta, gfp_t gfp) | |
277 | { | |
278 | if (local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL) | |
279 | return 0; | |
280 | ||
889cbb91 | 281 | sta->rate_ctrl = local->rate_ctrl; |
af65cd96 JB |
282 | sta->rate_ctrl_priv = rate_control_alloc_sta(sta->rate_ctrl, |
283 | &sta->sta, gfp); | |
889cbb91 | 284 | if (!sta->rate_ctrl_priv) |
af65cd96 | 285 | return -ENOMEM; |
af65cd96 JB |
286 | |
287 | return 0; | |
288 | } | |
289 | ||
73651ee6 | 290 | struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata, |
56544160 | 291 | const u8 *addr, gfp_t gfp) |
f0706e82 | 292 | { |
d0709a65 | 293 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 294 | struct sta_info *sta; |
ebe27c91 | 295 | struct timespec uptime; |
ad38bfc9 | 296 | struct ieee80211_tx_latency_bin_ranges *tx_latency; |
16c5f15c | 297 | int i; |
f0706e82 | 298 | |
17741cdc | 299 | sta = kzalloc(sizeof(*sta) + local->hw.sta_data_size, gfp); |
f0706e82 | 300 | if (!sta) |
73651ee6 | 301 | return NULL; |
f0706e82 | 302 | |
ef04a297 JB |
303 | rcu_read_lock(); |
304 | tx_latency = rcu_dereference(local->tx_latency); | |
305 | /* init stations Tx latency statistics && TID bins */ | |
306 | if (tx_latency) { | |
307 | sta->tx_lat = kzalloc(IEEE80211_NUM_TIDS * | |
308 | sizeof(struct ieee80211_tx_latency_stat), | |
309 | GFP_ATOMIC); | |
310 | if (!sta->tx_lat) { | |
311 | rcu_read_unlock(); | |
312 | goto free; | |
313 | } | |
314 | ||
315 | if (tx_latency->n_ranges) { | |
316 | for (i = 0; i < IEEE80211_NUM_TIDS; i++) { | |
317 | /* size of bins is size of the ranges +1 */ | |
318 | sta->tx_lat[i].bin_count = | |
319 | tx_latency->n_ranges + 1; | |
320 | sta->tx_lat[i].bins = | |
321 | kcalloc(sta->tx_lat[i].bin_count, | |
322 | sizeof(u32), GFP_ATOMIC); | |
323 | if (!sta->tx_lat[i].bins) { | |
324 | rcu_read_unlock(); | |
325 | goto free; | |
326 | } | |
327 | } | |
328 | } | |
329 | } | |
330 | rcu_read_unlock(); | |
331 | ||
07346f81 | 332 | spin_lock_init(&sta->lock); |
af818581 | 333 | INIT_WORK(&sta->drv_unblock_wk, sta_unblock); |
67c282c0 | 334 | INIT_WORK(&sta->ampdu_mlme.work, ieee80211_ba_session_work); |
a93e3644 | 335 | mutex_init(&sta->ampdu_mlme.mtx); |
87f59c70 TP |
336 | #ifdef CONFIG_MAC80211_MESH |
337 | if (ieee80211_vif_is_mesh(&sdata->vif) && | |
338 | !sdata->u.mesh.user_mpm) | |
339 | init_timer(&sta->plink_timer); | |
6c7c4cbf | 340 | sta->nonpeer_pm = NL80211_MESH_POWER_ACTIVE; |
87f59c70 | 341 | #endif |
07346f81 | 342 | |
17741cdc | 343 | memcpy(sta->sta.addr, addr, ETH_ALEN); |
d0709a65 JB |
344 | sta->local = local; |
345 | sta->sdata = sdata; | |
8bc8aecd | 346 | sta->last_rx = jiffies; |
f0706e82 | 347 | |
71ec375c JB |
348 | sta->sta_state = IEEE80211_STA_NONE; |
349 | ||
ebe27c91 MSS |
350 | do_posix_clock_monotonic_gettime(&uptime); |
351 | sta->last_connected = uptime.tv_sec; | |
541a45a1 | 352 | ewma_init(&sta->avg_signal, 1024, 8); |
ef0621e8 FF |
353 | for (i = 0; i < ARRAY_SIZE(sta->chain_signal_avg); i++) |
354 | ewma_init(&sta->chain_signal_avg[i], 1024, 8); | |
541a45a1 | 355 | |
ef04a297 JB |
356 | if (sta_prepare_rate_control(local, sta, gfp)) |
357 | goto free; | |
f0706e82 | 358 | |
5a306f58 | 359 | for (i = 0; i < IEEE80211_NUM_TIDS; i++) { |
a622ab72 JB |
360 | /* |
361 | * timer_to_tid must be initialized with identity mapping | |
362 | * to enable session_timer's data differentiation. See | |
363 | * sta_rx_agg_session_timer_expired for usage. | |
364 | */ | |
16c5f15c | 365 | sta->timer_to_tid[i] = i; |
16c5f15c | 366 | } |
948d887d JB |
367 | for (i = 0; i < IEEE80211_NUM_ACS; i++) { |
368 | skb_queue_head_init(&sta->ps_tx_buf[i]); | |
369 | skb_queue_head_init(&sta->tx_filtered[i]); | |
370 | } | |
73651ee6 | 371 | |
5a306f58 | 372 | for (i = 0; i < IEEE80211_NUM_TIDS; i++) |
4be929be | 373 | sta->last_seq_ctrl[i] = cpu_to_le16(USHRT_MAX); |
cccaec98 | 374 | |
af0ed69b | 375 | sta->sta.smps_mode = IEEE80211_SMPS_OFF; |
687da132 EG |
376 | if (sdata->vif.type == NL80211_IFTYPE_AP || |
377 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { | |
378 | struct ieee80211_supported_band *sband = | |
379 | local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)]; | |
380 | u8 smps = (sband->ht_cap.cap & IEEE80211_HT_CAP_SM_PS) >> | |
381 | IEEE80211_HT_CAP_SM_PS_SHIFT; | |
382 | /* | |
383 | * Assume that hostapd advertises our caps in the beacon and | |
384 | * this is the known_smps_mode for a station that just assciated | |
385 | */ | |
386 | switch (smps) { | |
387 | case WLAN_HT_SMPS_CONTROL_DISABLED: | |
388 | sta->known_smps_mode = IEEE80211_SMPS_OFF; | |
389 | break; | |
390 | case WLAN_HT_SMPS_CONTROL_STATIC: | |
391 | sta->known_smps_mode = IEEE80211_SMPS_STATIC; | |
392 | break; | |
393 | case WLAN_HT_SMPS_CONTROL_DYNAMIC: | |
394 | sta->known_smps_mode = IEEE80211_SMPS_DYNAMIC; | |
395 | break; | |
396 | default: | |
397 | WARN_ON(1); | |
398 | } | |
399 | } | |
af0ed69b | 400 | |
bdcbd8e0 | 401 | sta_dbg(sdata, "Allocated STA %pM\n", sta->sta.addr); |
73651ee6 | 402 | return sta; |
ef04a297 JB |
403 | |
404 | free: | |
405 | if (sta->tx_lat) { | |
406 | for (i = 0; i < IEEE80211_NUM_TIDS; i++) | |
407 | kfree(sta->tx_lat[i].bins); | |
408 | kfree(sta->tx_lat); | |
409 | } | |
410 | kfree(sta); | |
411 | return NULL; | |
73651ee6 JB |
412 | } |
413 | ||
8c71df7a | 414 | static int sta_info_insert_check(struct sta_info *sta) |
34e89507 | 415 | { |
34e89507 | 416 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
34e89507 | 417 | |
03e4497e JB |
418 | /* |
419 | * Can't be a WARN_ON because it can be triggered through a race: | |
420 | * something inserts a STA (on one CPU) without holding the RTNL | |
421 | * and another CPU turns off the net device. | |
422 | */ | |
8c71df7a GE |
423 | if (unlikely(!ieee80211_sdata_running(sdata))) |
424 | return -ENETDOWN; | |
03e4497e | 425 | |
b203ca39 | 426 | if (WARN_ON(ether_addr_equal(sta->sta.addr, sdata->vif.addr) || |
8c71df7a GE |
427 | is_multicast_ether_addr(sta->sta.addr))) |
428 | return -EINVAL; | |
429 | ||
430 | return 0; | |
431 | } | |
432 | ||
f09603a2 JB |
433 | static int sta_info_insert_drv_state(struct ieee80211_local *local, |
434 | struct ieee80211_sub_if_data *sdata, | |
435 | struct sta_info *sta) | |
436 | { | |
437 | enum ieee80211_sta_state state; | |
438 | int err = 0; | |
439 | ||
440 | for (state = IEEE80211_STA_NOTEXIST; state < sta->sta_state; state++) { | |
441 | err = drv_sta_state(local, sdata, sta, state, state + 1); | |
442 | if (err) | |
443 | break; | |
444 | } | |
445 | ||
446 | if (!err) { | |
a4ec45a4 JB |
447 | /* |
448 | * Drivers using legacy sta_add/sta_remove callbacks only | |
449 | * get uploaded set to true after sta_add is called. | |
450 | */ | |
451 | if (!local->ops->sta_add) | |
452 | sta->uploaded = true; | |
f09603a2 JB |
453 | return 0; |
454 | } | |
455 | ||
456 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { | |
bdcbd8e0 JB |
457 | sdata_info(sdata, |
458 | "failed to move IBSS STA %pM to state %d (%d) - keeping it anyway\n", | |
459 | sta->sta.addr, state + 1, err); | |
f09603a2 JB |
460 | err = 0; |
461 | } | |
462 | ||
463 | /* unwind on error */ | |
464 | for (; state > IEEE80211_STA_NOTEXIST; state--) | |
465 | WARN_ON(drv_sta_state(local, sdata, sta, state, state - 1)); | |
466 | ||
467 | return err; | |
468 | } | |
469 | ||
8c71df7a GE |
470 | /* |
471 | * should be called with sta_mtx locked | |
472 | * this function replaces the mutex lock | |
473 | * with a RCU lock | |
474 | */ | |
4d33960b | 475 | static int sta_info_insert_finish(struct sta_info *sta) __acquires(RCU) |
8c71df7a GE |
476 | { |
477 | struct ieee80211_local *local = sta->local; | |
478 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
7852e361 | 479 | struct station_info sinfo; |
8c71df7a GE |
480 | int err = 0; |
481 | ||
482 | lockdep_assert_held(&local->sta_mtx); | |
34e89507 | 483 | |
7852e361 JB |
484 | /* check if STA exists already */ |
485 | if (sta_info_get_bss(sdata, sta->sta.addr)) { | |
486 | err = -EEXIST; | |
487 | goto out_err; | |
4d33960b | 488 | } |
32bfd35d | 489 | |
7852e361 JB |
490 | /* notify driver */ |
491 | err = sta_info_insert_drv_state(local, sdata, sta); | |
492 | if (err) | |
493 | goto out_err; | |
4d33960b | 494 | |
7852e361 JB |
495 | local->num_sta++; |
496 | local->sta_generation++; | |
497 | smp_mb(); | |
4d33960b | 498 | |
7852e361 JB |
499 | /* make the station visible */ |
500 | sta_info_hash_add(local, sta); | |
83d5cc01 | 501 | |
794454ce | 502 | list_add_rcu(&sta->list, &local->sta_list); |
4d33960b | 503 | |
7852e361 | 504 | set_sta_flag(sta, WLAN_STA_INSERTED); |
4d33960b | 505 | |
21f659bf | 506 | ieee80211_recalc_min_chandef(sdata); |
7852e361 JB |
507 | ieee80211_sta_debugfs_add(sta); |
508 | rate_control_add_sta_debugfs(sta); | |
4d33960b | 509 | |
7852e361 JB |
510 | memset(&sinfo, 0, sizeof(sinfo)); |
511 | sinfo.filled = 0; | |
512 | sinfo.generation = local->sta_generation; | |
513 | cfg80211_new_sta(sdata->dev, sta->sta.addr, &sinfo, GFP_KERNEL); | |
d0709a65 | 514 | |
bdcbd8e0 | 515 | sta_dbg(sdata, "Inserted STA %pM\n", sta->sta.addr); |
f0706e82 | 516 | |
34e89507 JB |
517 | /* move reference to rcu-protected */ |
518 | rcu_read_lock(); | |
519 | mutex_unlock(&local->sta_mtx); | |
e9f207f0 | 520 | |
73651ee6 JB |
521 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
522 | mesh_accept_plinks_update(sdata); | |
523 | ||
8c71df7a | 524 | return 0; |
4d33960b JB |
525 | out_err: |
526 | mutex_unlock(&local->sta_mtx); | |
527 | rcu_read_lock(); | |
528 | return err; | |
8c71df7a GE |
529 | } |
530 | ||
531 | int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU) | |
532 | { | |
533 | struct ieee80211_local *local = sta->local; | |
8c71df7a GE |
534 | int err = 0; |
535 | ||
4d33960b JB |
536 | might_sleep(); |
537 | ||
8c71df7a GE |
538 | err = sta_info_insert_check(sta); |
539 | if (err) { | |
540 | rcu_read_lock(); | |
541 | goto out_free; | |
542 | } | |
543 | ||
8c71df7a GE |
544 | mutex_lock(&local->sta_mtx); |
545 | ||
4d33960b | 546 | err = sta_info_insert_finish(sta); |
8c71df7a GE |
547 | if (err) |
548 | goto out_free; | |
549 | ||
73651ee6 | 550 | return 0; |
93e5deb1 JB |
551 | out_free: |
552 | BUG_ON(!err); | |
d9a7ddb0 | 553 | sta_info_free(local, sta); |
93e5deb1 | 554 | return err; |
f0706e82 JB |
555 | } |
556 | ||
34e89507 JB |
557 | int sta_info_insert(struct sta_info *sta) |
558 | { | |
559 | int err = sta_info_insert_rcu(sta); | |
560 | ||
561 | rcu_read_unlock(); | |
562 | ||
563 | return err; | |
564 | } | |
565 | ||
d012a605 | 566 | static inline void __bss_tim_set(u8 *tim, u16 id) |
004c872e JB |
567 | { |
568 | /* | |
569 | * This format has been mandated by the IEEE specifications, | |
570 | * so this line may not be changed to use the __set_bit() format. | |
571 | */ | |
d012a605 | 572 | tim[id / 8] |= (1 << (id % 8)); |
004c872e JB |
573 | } |
574 | ||
d012a605 | 575 | static inline void __bss_tim_clear(u8 *tim, u16 id) |
004c872e JB |
576 | { |
577 | /* | |
578 | * This format has been mandated by the IEEE specifications, | |
579 | * so this line may not be changed to use the __clear_bit() format. | |
580 | */ | |
d012a605 | 581 | tim[id / 8] &= ~(1 << (id % 8)); |
004c872e JB |
582 | } |
583 | ||
3d5839b6 IP |
584 | static inline bool __bss_tim_get(u8 *tim, u16 id) |
585 | { | |
586 | /* | |
587 | * This format has been mandated by the IEEE specifications, | |
588 | * so this line may not be changed to use the test_bit() format. | |
589 | */ | |
590 | return tim[id / 8] & (1 << (id % 8)); | |
591 | } | |
592 | ||
948d887d | 593 | static unsigned long ieee80211_tids_for_ac(int ac) |
004c872e | 594 | { |
948d887d JB |
595 | /* If we ever support TIDs > 7, this obviously needs to be adjusted */ |
596 | switch (ac) { | |
597 | case IEEE80211_AC_VO: | |
598 | return BIT(6) | BIT(7); | |
599 | case IEEE80211_AC_VI: | |
600 | return BIT(4) | BIT(5); | |
601 | case IEEE80211_AC_BE: | |
602 | return BIT(0) | BIT(3); | |
603 | case IEEE80211_AC_BK: | |
604 | return BIT(1) | BIT(2); | |
605 | default: | |
606 | WARN_ON(1); | |
607 | return 0; | |
d0709a65 | 608 | } |
004c872e JB |
609 | } |
610 | ||
c868cb35 | 611 | void sta_info_recalc_tim(struct sta_info *sta) |
004c872e | 612 | { |
c868cb35 | 613 | struct ieee80211_local *local = sta->local; |
d012a605 | 614 | struct ps_data *ps; |
948d887d JB |
615 | bool indicate_tim = false; |
616 | u8 ignore_for_tim = sta->sta.uapsd_queues; | |
617 | int ac; | |
d012a605 MP |
618 | u16 id; |
619 | ||
620 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP || | |
621 | sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { | |
622 | if (WARN_ON_ONCE(!sta->sdata->bss)) | |
623 | return; | |
004c872e | 624 | |
d012a605 MP |
625 | ps = &sta->sdata->bss->ps; |
626 | id = sta->sta.aid; | |
3f52b7e3 MP |
627 | #ifdef CONFIG_MAC80211_MESH |
628 | } else if (ieee80211_vif_is_mesh(&sta->sdata->vif)) { | |
629 | ps = &sta->sdata->u.mesh.ps; | |
204d1304 | 630 | /* TIM map only for 1 <= PLID <= IEEE80211_MAX_AID */ |
6f101ef0 | 631 | id = sta->plid % (IEEE80211_MAX_AID + 1); |
3f52b7e3 | 632 | #endif |
d012a605 | 633 | } else { |
c868cb35 | 634 | return; |
d012a605 | 635 | } |
3e122be0 | 636 | |
c868cb35 JB |
637 | /* No need to do anything if the driver does all */ |
638 | if (local->hw.flags & IEEE80211_HW_AP_LINK_PS) | |
639 | return; | |
004c872e | 640 | |
c868cb35 JB |
641 | if (sta->dead) |
642 | goto done; | |
3e122be0 | 643 | |
948d887d JB |
644 | /* |
645 | * If all ACs are delivery-enabled then we should build | |
646 | * the TIM bit for all ACs anyway; if only some are then | |
647 | * we ignore those and build the TIM bit using only the | |
648 | * non-enabled ones. | |
649 | */ | |
650 | if (ignore_for_tim == BIT(IEEE80211_NUM_ACS) - 1) | |
651 | ignore_for_tim = 0; | |
652 | ||
653 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { | |
654 | unsigned long tids; | |
3e122be0 | 655 | |
948d887d JB |
656 | if (ignore_for_tim & BIT(ac)) |
657 | continue; | |
658 | ||
659 | indicate_tim |= !skb_queue_empty(&sta->tx_filtered[ac]) || | |
660 | !skb_queue_empty(&sta->ps_tx_buf[ac]); | |
661 | if (indicate_tim) | |
662 | break; | |
3e122be0 | 663 | |
948d887d JB |
664 | tids = ieee80211_tids_for_ac(ac); |
665 | ||
666 | indicate_tim |= | |
667 | sta->driver_buffered_tids & tids; | |
d0709a65 | 668 | } |
004c872e | 669 | |
c868cb35 | 670 | done: |
65f704a5 | 671 | spin_lock_bh(&local->tim_lock); |
004c872e | 672 | |
3d5839b6 IP |
673 | if (indicate_tim == __bss_tim_get(ps->tim, id)) |
674 | goto out_unlock; | |
675 | ||
948d887d | 676 | if (indicate_tim) |
d012a605 | 677 | __bss_tim_set(ps->tim, id); |
c868cb35 | 678 | else |
d012a605 | 679 | __bss_tim_clear(ps->tim, id); |
004c872e | 680 | |
c868cb35 JB |
681 | if (local->ops->set_tim) { |
682 | local->tim_in_locked_section = true; | |
948d887d | 683 | drv_set_tim(local, &sta->sta, indicate_tim); |
c868cb35 JB |
684 | local->tim_in_locked_section = false; |
685 | } | |
3e122be0 | 686 | |
3d5839b6 | 687 | out_unlock: |
65f704a5 | 688 | spin_unlock_bh(&local->tim_lock); |
004c872e JB |
689 | } |
690 | ||
cd0b8d89 | 691 | static bool sta_info_buffer_expired(struct sta_info *sta, struct sk_buff *skb) |
f0706e82 | 692 | { |
e039fa4a | 693 | struct ieee80211_tx_info *info; |
f0706e82 JB |
694 | int timeout; |
695 | ||
696 | if (!skb) | |
cd0b8d89 | 697 | return false; |
f0706e82 | 698 | |
e039fa4a | 699 | info = IEEE80211_SKB_CB(skb); |
f0706e82 JB |
700 | |
701 | /* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */ | |
57c4d7b4 JB |
702 | timeout = (sta->listen_interval * |
703 | sta->sdata->vif.bss_conf.beacon_int * | |
704 | 32 / 15625) * HZ; | |
f0706e82 JB |
705 | if (timeout < STA_TX_BUFFER_EXPIRE) |
706 | timeout = STA_TX_BUFFER_EXPIRE; | |
e039fa4a | 707 | return time_after(jiffies, info->control.jiffies + timeout); |
f0706e82 JB |
708 | } |
709 | ||
710 | ||
948d887d JB |
711 | static bool sta_info_cleanup_expire_buffered_ac(struct ieee80211_local *local, |
712 | struct sta_info *sta, int ac) | |
f0706e82 JB |
713 | { |
714 | unsigned long flags; | |
715 | struct sk_buff *skb; | |
716 | ||
60750397 JB |
717 | /* |
718 | * First check for frames that should expire on the filtered | |
719 | * queue. Frames here were rejected by the driver and are on | |
720 | * a separate queue to avoid reordering with normal PS-buffered | |
721 | * frames. They also aren't accounted for right now in the | |
722 | * total_ps_buffered counter. | |
723 | */ | |
724 | for (;;) { | |
948d887d JB |
725 | spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags); |
726 | skb = skb_peek(&sta->tx_filtered[ac]); | |
60750397 | 727 | if (sta_info_buffer_expired(sta, skb)) |
948d887d | 728 | skb = __skb_dequeue(&sta->tx_filtered[ac]); |
60750397 JB |
729 | else |
730 | skb = NULL; | |
948d887d | 731 | spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags); |
60750397 JB |
732 | |
733 | /* | |
734 | * Frames are queued in order, so if this one | |
735 | * hasn't expired yet we can stop testing. If | |
736 | * we actually reached the end of the queue we | |
737 | * also need to stop, of course. | |
738 | */ | |
739 | if (!skb) | |
740 | break; | |
d4fa14cd | 741 | ieee80211_free_txskb(&local->hw, skb); |
60750397 JB |
742 | } |
743 | ||
744 | /* | |
745 | * Now also check the normal PS-buffered queue, this will | |
746 | * only find something if the filtered queue was emptied | |
747 | * since the filtered frames are all before the normal PS | |
748 | * buffered frames. | |
749 | */ | |
f0706e82 | 750 | for (;;) { |
948d887d JB |
751 | spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags); |
752 | skb = skb_peek(&sta->ps_tx_buf[ac]); | |
57c4d7b4 | 753 | if (sta_info_buffer_expired(sta, skb)) |
948d887d | 754 | skb = __skb_dequeue(&sta->ps_tx_buf[ac]); |
836341a7 | 755 | else |
f0706e82 | 756 | skb = NULL; |
948d887d | 757 | spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags); |
f0706e82 | 758 | |
60750397 JB |
759 | /* |
760 | * frames are queued in order, so if this one | |
761 | * hasn't expired yet (or we reached the end of | |
762 | * the queue) we can stop testing | |
763 | */ | |
836341a7 | 764 | if (!skb) |
f0706e82 | 765 | break; |
836341a7 | 766 | |
836341a7 | 767 | local->total_ps_buffered--; |
bdcbd8e0 JB |
768 | ps_dbg(sta->sdata, "Buffered frame expired (STA %pM)\n", |
769 | sta->sta.addr); | |
d4fa14cd | 770 | ieee80211_free_txskb(&local->hw, skb); |
f0706e82 | 771 | } |
3393a608 | 772 | |
60750397 JB |
773 | /* |
774 | * Finally, recalculate the TIM bit for this station -- it might | |
775 | * now be clear because the station was too slow to retrieve its | |
776 | * frames. | |
777 | */ | |
778 | sta_info_recalc_tim(sta); | |
779 | ||
780 | /* | |
781 | * Return whether there are any frames still buffered, this is | |
782 | * used to check whether the cleanup timer still needs to run, | |
783 | * if there are no frames we don't need to rearm the timer. | |
784 | */ | |
948d887d JB |
785 | return !(skb_queue_empty(&sta->ps_tx_buf[ac]) && |
786 | skb_queue_empty(&sta->tx_filtered[ac])); | |
787 | } | |
788 | ||
789 | static bool sta_info_cleanup_expire_buffered(struct ieee80211_local *local, | |
790 | struct sta_info *sta) | |
791 | { | |
792 | bool have_buffered = false; | |
793 | int ac; | |
794 | ||
3f52b7e3 MP |
795 | /* This is only necessary for stations on BSS/MBSS interfaces */ |
796 | if (!sta->sdata->bss && | |
797 | !ieee80211_vif_is_mesh(&sta->sdata->vif)) | |
948d887d JB |
798 | return false; |
799 | ||
800 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) | |
801 | have_buffered |= | |
802 | sta_info_cleanup_expire_buffered_ac(local, sta, ac); | |
803 | ||
804 | return have_buffered; | |
f0706e82 JB |
805 | } |
806 | ||
d778207b | 807 | static int __must_check __sta_info_destroy_part1(struct sta_info *sta) |
f0706e82 | 808 | { |
34e89507 JB |
809 | struct ieee80211_local *local; |
810 | struct ieee80211_sub_if_data *sdata; | |
6d10e46b | 811 | int ret; |
f0706e82 | 812 | |
34e89507 | 813 | might_sleep(); |
f0706e82 | 814 | |
34e89507 JB |
815 | if (!sta) |
816 | return -ENOENT; | |
5bb644a0 | 817 | |
34e89507 JB |
818 | local = sta->local; |
819 | sdata = sta->sdata; | |
f0706e82 | 820 | |
83d5cc01 JB |
821 | lockdep_assert_held(&local->sta_mtx); |
822 | ||
098a6070 JB |
823 | /* |
824 | * Before removing the station from the driver and | |
825 | * rate control, it might still start new aggregation | |
826 | * sessions -- block that to make sure the tear-down | |
827 | * will be sufficient. | |
828 | */ | |
c2c98fde | 829 | set_sta_flag(sta, WLAN_STA_BLOCK_BA); |
c82c4a80 | 830 | ieee80211_sta_tear_down_BA_sessions(sta, AGG_STOP_DESTROY_STA); |
098a6070 | 831 | |
34e89507 | 832 | ret = sta_info_hash_del(local, sta); |
b01711be | 833 | if (WARN_ON(ret)) |
34e89507 JB |
834 | return ret; |
835 | ||
794454ce | 836 | list_del_rcu(&sta->list); |
4d33960b | 837 | |
6a9d1b91 JB |
838 | drv_sta_pre_rcu_remove(local, sta->sdata, sta); |
839 | ||
a710c816 JB |
840 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN && |
841 | rcu_access_pointer(sdata->u.vlan.sta) == sta) | |
842 | RCU_INIT_POINTER(sdata->u.vlan.sta, NULL); | |
843 | ||
d778207b JB |
844 | return 0; |
845 | } | |
846 | ||
847 | static void __sta_info_destroy_part2(struct sta_info *sta) | |
848 | { | |
849 | struct ieee80211_local *local = sta->local; | |
850 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
851 | int ret; | |
852 | ||
853 | /* | |
854 | * NOTE: This assumes at least synchronize_net() was done | |
855 | * after _part1 and before _part2! | |
856 | */ | |
857 | ||
858 | might_sleep(); | |
859 | lockdep_assert_held(&local->sta_mtx); | |
860 | ||
c8782078 | 861 | /* now keys can no longer be reached */ |
6d10e46b | 862 | ieee80211_free_sta_keys(local, sta); |
34e89507 JB |
863 | |
864 | sta->dead = true; | |
865 | ||
34e89507 JB |
866 | local->num_sta--; |
867 | local->sta_generation++; | |
868 | ||
83d5cc01 | 869 | while (sta->sta_state > IEEE80211_STA_NONE) { |
f09603a2 JB |
870 | ret = sta_info_move_state(sta, sta->sta_state - 1); |
871 | if (ret) { | |
83d5cc01 JB |
872 | WARN_ON_ONCE(1); |
873 | break; | |
874 | } | |
875 | } | |
d9a7ddb0 | 876 | |
f09603a2 | 877 | if (sta->uploaded) { |
f09603a2 JB |
878 | ret = drv_sta_state(local, sdata, sta, IEEE80211_STA_NONE, |
879 | IEEE80211_STA_NOTEXIST); | |
880 | WARN_ON_ONCE(ret != 0); | |
881 | } | |
34e89507 | 882 | |
bdcbd8e0 JB |
883 | sta_dbg(sdata, "Removed STA %pM\n", sta->sta.addr); |
884 | ||
ec15e68b JM |
885 | cfg80211_del_sta(sdata->dev, sta->sta.addr, GFP_KERNEL); |
886 | ||
34e89507 JB |
887 | rate_control_remove_sta_debugfs(sta); |
888 | ieee80211_sta_debugfs_remove(sta); | |
21f659bf | 889 | ieee80211_recalc_min_chandef(sdata); |
34e89507 | 890 | |
d34ba216 | 891 | cleanup_single_sta(sta); |
d778207b JB |
892 | } |
893 | ||
894 | int __must_check __sta_info_destroy(struct sta_info *sta) | |
895 | { | |
896 | int err = __sta_info_destroy_part1(sta); | |
897 | ||
898 | if (err) | |
899 | return err; | |
900 | ||
901 | synchronize_net(); | |
902 | ||
903 | __sta_info_destroy_part2(sta); | |
34e89507 JB |
904 | |
905 | return 0; | |
4d6141c3 JS |
906 | } |
907 | ||
34e89507 | 908 | int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, const u8 *addr) |
4d6141c3 | 909 | { |
34e89507 JB |
910 | struct sta_info *sta; |
911 | int ret; | |
4d6141c3 | 912 | |
34e89507 | 913 | mutex_lock(&sdata->local->sta_mtx); |
7852e361 | 914 | sta = sta_info_get(sdata, addr); |
34e89507 JB |
915 | ret = __sta_info_destroy(sta); |
916 | mutex_unlock(&sdata->local->sta_mtx); | |
4d6141c3 JS |
917 | |
918 | return ret; | |
919 | } | |
920 | ||
34e89507 JB |
921 | int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata, |
922 | const u8 *addr) | |
e9f207f0 | 923 | { |
34e89507 JB |
924 | struct sta_info *sta; |
925 | int ret; | |
e9f207f0 | 926 | |
34e89507 | 927 | mutex_lock(&sdata->local->sta_mtx); |
7852e361 | 928 | sta = sta_info_get_bss(sdata, addr); |
34e89507 JB |
929 | ret = __sta_info_destroy(sta); |
930 | mutex_unlock(&sdata->local->sta_mtx); | |
d0709a65 | 931 | |
34e89507 JB |
932 | return ret; |
933 | } | |
e9f207f0 | 934 | |
34e89507 JB |
935 | static void sta_info_cleanup(unsigned long data) |
936 | { | |
937 | struct ieee80211_local *local = (struct ieee80211_local *) data; | |
938 | struct sta_info *sta; | |
3393a608 | 939 | bool timer_needed = false; |
34e89507 JB |
940 | |
941 | rcu_read_lock(); | |
942 | list_for_each_entry_rcu(sta, &local->sta_list, list) | |
3393a608 JO |
943 | if (sta_info_cleanup_expire_buffered(local, sta)) |
944 | timer_needed = true; | |
34e89507 | 945 | rcu_read_unlock(); |
e9f207f0 | 946 | |
34e89507 JB |
947 | if (local->quiescing) |
948 | return; | |
d0709a65 | 949 | |
3393a608 JO |
950 | if (!timer_needed) |
951 | return; | |
952 | ||
26d59535 JB |
953 | mod_timer(&local->sta_cleanup, |
954 | round_jiffies(jiffies + STA_INFO_CLEANUP_INTERVAL)); | |
e9f207f0 | 955 | } |
e9f207f0 | 956 | |
f0706e82 JB |
957 | void sta_info_init(struct ieee80211_local *local) |
958 | { | |
4d33960b | 959 | spin_lock_init(&local->tim_lock); |
34e89507 | 960 | mutex_init(&local->sta_mtx); |
f0706e82 | 961 | INIT_LIST_HEAD(&local->sta_list); |
f0706e82 | 962 | |
b24b8a24 PE |
963 | setup_timer(&local->sta_cleanup, sta_info_cleanup, |
964 | (unsigned long)local); | |
f0706e82 JB |
965 | } |
966 | ||
967 | void sta_info_stop(struct ieee80211_local *local) | |
968 | { | |
a56f992c | 969 | del_timer_sync(&local->sta_cleanup); |
f0706e82 JB |
970 | } |
971 | ||
051007d9 | 972 | |
e716251d | 973 | int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans) |
f0706e82 | 974 | { |
b998e8bb | 975 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 976 | struct sta_info *sta, *tmp; |
d778207b | 977 | LIST_HEAD(free_list); |
44213b5e | 978 | int ret = 0; |
f0706e82 | 979 | |
d0709a65 | 980 | might_sleep(); |
be8755e1 | 981 | |
e716251d JB |
982 | WARN_ON(vlans && sdata->vif.type != NL80211_IFTYPE_AP); |
983 | WARN_ON(vlans && !sdata->bss); | |
984 | ||
34e89507 | 985 | mutex_lock(&local->sta_mtx); |
d0709a65 | 986 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { |
e716251d JB |
987 | if (sdata == sta->sdata || |
988 | (vlans && sdata->bss == sta->sdata->bss)) { | |
d778207b JB |
989 | if (!WARN_ON(__sta_info_destroy_part1(sta))) |
990 | list_add(&sta->free_list, &free_list); | |
34316837 JB |
991 | ret++; |
992 | } | |
be8755e1 | 993 | } |
d778207b JB |
994 | |
995 | if (!list_empty(&free_list)) { | |
996 | synchronize_net(); | |
997 | list_for_each_entry_safe(sta, tmp, &free_list, free_list) | |
998 | __sta_info_destroy_part2(sta); | |
999 | } | |
34e89507 | 1000 | mutex_unlock(&local->sta_mtx); |
44213b5e | 1001 | |
051007d9 JB |
1002 | return ret; |
1003 | } | |
1004 | ||
24723d1b JB |
1005 | void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, |
1006 | unsigned long exp_time) | |
1007 | { | |
1008 | struct ieee80211_local *local = sdata->local; | |
1009 | struct sta_info *sta, *tmp; | |
24723d1b | 1010 | |
34e89507 | 1011 | mutex_lock(&local->sta_mtx); |
e46a2cf9 MSS |
1012 | |
1013 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { | |
ec2b774e ML |
1014 | if (sdata != sta->sdata) |
1015 | continue; | |
1016 | ||
24723d1b | 1017 | if (time_after(jiffies, sta->last_rx + exp_time)) { |
eea57d42 MSS |
1018 | sta_dbg(sta->sdata, "expiring inactive STA %pM\n", |
1019 | sta->sta.addr); | |
3f52b7e3 MP |
1020 | |
1021 | if (ieee80211_vif_is_mesh(&sdata->vif) && | |
1022 | test_sta_flag(sta, WLAN_STA_PS_STA)) | |
1023 | atomic_dec(&sdata->u.mesh.ps.num_sta_ps); | |
1024 | ||
34e89507 | 1025 | WARN_ON(__sta_info_destroy(sta)); |
24723d1b | 1026 | } |
e46a2cf9 MSS |
1027 | } |
1028 | ||
34e89507 | 1029 | mutex_unlock(&local->sta_mtx); |
24723d1b | 1030 | } |
17741cdc | 1031 | |
686b9cb9 BG |
1032 | struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw, |
1033 | const u8 *addr, | |
1034 | const u8 *localaddr) | |
17741cdc | 1035 | { |
abe60632 | 1036 | struct sta_info *sta, *nxt; |
17741cdc | 1037 | |
686b9cb9 BG |
1038 | /* |
1039 | * Just return a random station if localaddr is NULL | |
1040 | * ... first in list. | |
1041 | */ | |
f7c65594 | 1042 | for_each_sta_info(hw_to_local(hw), addr, sta, nxt) { |
686b9cb9 | 1043 | if (localaddr && |
b203ca39 | 1044 | !ether_addr_equal(sta->sdata->vif.addr, localaddr)) |
686b9cb9 | 1045 | continue; |
f7c65594 JB |
1046 | if (!sta->uploaded) |
1047 | return NULL; | |
abe60632 | 1048 | return &sta->sta; |
f7c65594 JB |
1049 | } |
1050 | ||
abe60632 | 1051 | return NULL; |
17741cdc | 1052 | } |
686b9cb9 | 1053 | EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_ifaddr); |
5ed176e1 JB |
1054 | |
1055 | struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif, | |
1056 | const u8 *addr) | |
1057 | { | |
f7c65594 | 1058 | struct sta_info *sta; |
5ed176e1 JB |
1059 | |
1060 | if (!vif) | |
1061 | return NULL; | |
1062 | ||
f7c65594 JB |
1063 | sta = sta_info_get_bss(vif_to_sdata(vif), addr); |
1064 | if (!sta) | |
1065 | return NULL; | |
1066 | ||
1067 | if (!sta->uploaded) | |
1068 | return NULL; | |
5ed176e1 | 1069 | |
f7c65594 | 1070 | return &sta->sta; |
5ed176e1 | 1071 | } |
17741cdc | 1072 | EXPORT_SYMBOL(ieee80211_find_sta); |
af818581 | 1073 | |
50a9432d JB |
1074 | static void clear_sta_ps_flags(void *_sta) |
1075 | { | |
1076 | struct sta_info *sta = _sta; | |
608383bf | 1077 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
d012a605 MP |
1078 | struct ps_data *ps; |
1079 | ||
1080 | if (sdata->vif.type == NL80211_IFTYPE_AP || | |
1081 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
1082 | ps = &sdata->bss->ps; | |
3f52b7e3 MP |
1083 | else if (ieee80211_vif_is_mesh(&sdata->vif)) |
1084 | ps = &sdata->u.mesh.ps; | |
d012a605 MP |
1085 | else |
1086 | return; | |
50a9432d | 1087 | |
c2c98fde | 1088 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); |
608383bf | 1089 | if (test_and_clear_sta_flag(sta, WLAN_STA_PS_STA)) |
d012a605 | 1090 | atomic_dec(&ps->num_sta_ps); |
50a9432d JB |
1091 | } |
1092 | ||
af818581 JB |
1093 | /* powersave support code */ |
1094 | void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta) | |
1095 | { | |
1096 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
1097 | struct ieee80211_local *local = sdata->local; | |
948d887d JB |
1098 | struct sk_buff_head pending; |
1099 | int filtered = 0, buffered = 0, ac; | |
987c285c | 1100 | unsigned long flags; |
948d887d | 1101 | |
c2c98fde | 1102 | clear_sta_flag(sta, WLAN_STA_SP); |
47086fc5 | 1103 | |
5a306f58 | 1104 | BUILD_BUG_ON(BITS_TO_LONGS(IEEE80211_NUM_TIDS) > 1); |
948d887d | 1105 | sta->driver_buffered_tids = 0; |
af818581 | 1106 | |
d057e5a3 AN |
1107 | if (!(local->hw.flags & IEEE80211_HW_AP_LINK_PS)) |
1108 | drv_sta_notify(local, sdata, STA_NOTIFY_AWAKE, &sta->sta); | |
af818581 | 1109 | |
948d887d | 1110 | skb_queue_head_init(&pending); |
af818581 JB |
1111 | |
1112 | /* Send all buffered frames to the station */ | |
948d887d JB |
1113 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { |
1114 | int count = skb_queue_len(&pending), tmp; | |
1115 | ||
987c285c | 1116 | spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags); |
948d887d | 1117 | skb_queue_splice_tail_init(&sta->tx_filtered[ac], &pending); |
987c285c | 1118 | spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags); |
948d887d JB |
1119 | tmp = skb_queue_len(&pending); |
1120 | filtered += tmp - count; | |
1121 | count = tmp; | |
1122 | ||
987c285c | 1123 | spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags); |
948d887d | 1124 | skb_queue_splice_tail_init(&sta->ps_tx_buf[ac], &pending); |
987c285c | 1125 | spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags); |
948d887d JB |
1126 | tmp = skb_queue_len(&pending); |
1127 | buffered += tmp - count; | |
1128 | } | |
1129 | ||
1130 | ieee80211_add_pending_skbs_fn(local, &pending, clear_sta_ps_flags, sta); | |
1131 | ||
687da132 EG |
1132 | /* This station just woke up and isn't aware of our SMPS state */ |
1133 | if (!ieee80211_smps_is_restrictive(sta->known_smps_mode, | |
1134 | sdata->smps_mode) && | |
1135 | sta->known_smps_mode != sdata->bss->req_smps && | |
1136 | sta_info_tx_streams(sta) != 1) { | |
1137 | ht_dbg(sdata, | |
1138 | "%pM just woke up and MIMO capable - update SMPS\n", | |
1139 | sta->sta.addr); | |
1140 | ieee80211_send_smps_action(sdata, sdata->bss->req_smps, | |
1141 | sta->sta.addr, | |
1142 | sdata->vif.bss_conf.bssid); | |
1143 | } | |
1144 | ||
af818581 JB |
1145 | local->total_ps_buffered -= buffered; |
1146 | ||
c868cb35 JB |
1147 | sta_info_recalc_tim(sta); |
1148 | ||
bdcbd8e0 JB |
1149 | ps_dbg(sdata, |
1150 | "STA %pM aid %d sending %d filtered/%d PS frames since STA not sleeping anymore\n", | |
1151 | sta->sta.addr, sta->sta.aid, filtered, buffered); | |
af818581 JB |
1152 | } |
1153 | ||
ce662b44 JB |
1154 | static void ieee80211_send_null_response(struct ieee80211_sub_if_data *sdata, |
1155 | struct sta_info *sta, int tid, | |
40b96408 | 1156 | enum ieee80211_frame_release_type reason) |
af818581 | 1157 | { |
af818581 | 1158 | struct ieee80211_local *local = sdata->local; |
ce662b44 | 1159 | struct ieee80211_qos_hdr *nullfunc; |
af818581 | 1160 | struct sk_buff *skb; |
ce662b44 JB |
1161 | int size = sizeof(*nullfunc); |
1162 | __le16 fc; | |
c2c98fde | 1163 | bool qos = test_sta_flag(sta, WLAN_STA_WME); |
ce662b44 | 1164 | struct ieee80211_tx_info *info; |
55de908a | 1165 | struct ieee80211_chanctx_conf *chanctx_conf; |
af818581 | 1166 | |
ce662b44 JB |
1167 | if (qos) { |
1168 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | | |
1169 | IEEE80211_STYPE_QOS_NULLFUNC | | |
1170 | IEEE80211_FCTL_FROMDS); | |
1171 | } else { | |
1172 | size -= 2; | |
1173 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | | |
1174 | IEEE80211_STYPE_NULLFUNC | | |
1175 | IEEE80211_FCTL_FROMDS); | |
af818581 | 1176 | } |
af818581 | 1177 | |
ce662b44 JB |
1178 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + size); |
1179 | if (!skb) | |
1180 | return; | |
1181 | ||
1182 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
1183 | ||
1184 | nullfunc = (void *) skb_put(skb, size); | |
1185 | nullfunc->frame_control = fc; | |
1186 | nullfunc->duration_id = 0; | |
1187 | memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN); | |
1188 | memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); | |
1189 | memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN); | |
1190 | ||
59b66255 JB |
1191 | skb->priority = tid; |
1192 | skb_set_queue_mapping(skb, ieee802_1d_to_ac[tid]); | |
ce662b44 | 1193 | if (qos) { |
ce662b44 JB |
1194 | nullfunc->qos_ctrl = cpu_to_le16(tid); |
1195 | ||
40b96408 | 1196 | if (reason == IEEE80211_FRAME_RELEASE_UAPSD) |
ce662b44 JB |
1197 | nullfunc->qos_ctrl |= |
1198 | cpu_to_le16(IEEE80211_QOS_CTL_EOSP); | |
1199 | } | |
1200 | ||
1201 | info = IEEE80211_SKB_CB(skb); | |
1202 | ||
1203 | /* | |
1204 | * Tell TX path to send this frame even though the | |
1205 | * STA may still remain is PS mode after this frame | |
deeaee19 JB |
1206 | * exchange. Also set EOSP to indicate this packet |
1207 | * ends the poll/service period. | |
ce662b44 | 1208 | */ |
02f2f1a9 | 1209 | info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER | |
d6d23de2 | 1210 | IEEE80211_TX_CTL_PS_RESPONSE | |
deeaee19 JB |
1211 | IEEE80211_TX_STATUS_EOSP | |
1212 | IEEE80211_TX_CTL_REQ_TX_STATUS; | |
ce662b44 | 1213 | |
40b96408 JB |
1214 | drv_allow_buffered_frames(local, sta, BIT(tid), 1, reason, false); |
1215 | ||
89afe614 JB |
1216 | skb->dev = sdata->dev; |
1217 | ||
55de908a JB |
1218 | rcu_read_lock(); |
1219 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
1220 | if (WARN_ON(!chanctx_conf)) { | |
1221 | rcu_read_unlock(); | |
1222 | kfree_skb(skb); | |
1223 | return; | |
1224 | } | |
1225 | ||
4bf88530 | 1226 | ieee80211_xmit(sdata, skb, chanctx_conf->def.chan->band); |
55de908a | 1227 | rcu_read_unlock(); |
ce662b44 JB |
1228 | } |
1229 | ||
0a1cb809 JB |
1230 | static int find_highest_prio_tid(unsigned long tids) |
1231 | { | |
1232 | /* lower 3 TIDs aren't ordered perfectly */ | |
1233 | if (tids & 0xF8) | |
1234 | return fls(tids) - 1; | |
1235 | /* TID 0 is BE just like TID 3 */ | |
1236 | if (tids & BIT(0)) | |
1237 | return 0; | |
1238 | return fls(tids) - 1; | |
1239 | } | |
1240 | ||
47086fc5 JB |
1241 | static void |
1242 | ieee80211_sta_ps_deliver_response(struct sta_info *sta, | |
1243 | int n_frames, u8 ignored_acs, | |
1244 | enum ieee80211_frame_release_type reason) | |
af818581 JB |
1245 | { |
1246 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
1247 | struct ieee80211_local *local = sdata->local; | |
948d887d JB |
1248 | bool more_data = false; |
1249 | int ac; | |
4049e09a | 1250 | unsigned long driver_release_tids = 0; |
47086fc5 | 1251 | struct sk_buff_head frames; |
af818581 | 1252 | |
deeaee19 | 1253 | /* Service or PS-Poll period starts */ |
c2c98fde | 1254 | set_sta_flag(sta, WLAN_STA_SP); |
deeaee19 | 1255 | |
47086fc5 | 1256 | __skb_queue_head_init(&frames); |
948d887d | 1257 | |
f9f760b4 | 1258 | /* Get response frame(s) and more data bit for the last one. */ |
948d887d | 1259 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { |
4049e09a JB |
1260 | unsigned long tids; |
1261 | ||
47086fc5 | 1262 | if (ignored_acs & BIT(ac)) |
948d887d JB |
1263 | continue; |
1264 | ||
4049e09a JB |
1265 | tids = ieee80211_tids_for_ac(ac); |
1266 | ||
f9f760b4 JB |
1267 | /* if we already have frames from software, then we can't also |
1268 | * release from hardware queues | |
1269 | */ | |
1270 | if (skb_queue_empty(&frames)) | |
1271 | driver_release_tids |= sta->driver_buffered_tids & tids; | |
948d887d | 1272 | |
f9f760b4 JB |
1273 | if (driver_release_tids) { |
1274 | /* If the driver has data on more than one TID then | |
4049e09a | 1275 | * certainly there's more data if we release just a |
f9f760b4 JB |
1276 | * single frame now (from a single TID). This will |
1277 | * only happen for PS-Poll. | |
4049e09a | 1278 | */ |
47086fc5 JB |
1279 | if (reason == IEEE80211_FRAME_RELEASE_PSPOLL && |
1280 | hweight16(driver_release_tids) > 1) { | |
4049e09a JB |
1281 | more_data = true; |
1282 | driver_release_tids = | |
0a1cb809 JB |
1283 | BIT(find_highest_prio_tid( |
1284 | driver_release_tids)); | |
4049e09a JB |
1285 | break; |
1286 | } | |
f9f760b4 JB |
1287 | } else { |
1288 | struct sk_buff *skb; | |
1289 | ||
1290 | while (n_frames > 0) { | |
1291 | skb = skb_dequeue(&sta->tx_filtered[ac]); | |
1292 | if (!skb) { | |
1293 | skb = skb_dequeue( | |
1294 | &sta->ps_tx_buf[ac]); | |
1295 | if (skb) | |
1296 | local->total_ps_buffered--; | |
1297 | } | |
1298 | if (!skb) | |
1299 | break; | |
1300 | n_frames--; | |
1301 | __skb_queue_tail(&frames, skb); | |
1302 | } | |
4049e09a | 1303 | } |
948d887d | 1304 | |
f9f760b4 JB |
1305 | /* If we have more frames buffered on this AC, then set the |
1306 | * more-data bit and abort the loop since we can't send more | |
1307 | * data from other ACs before the buffered frames from this. | |
1308 | */ | |
948d887d JB |
1309 | if (!skb_queue_empty(&sta->tx_filtered[ac]) || |
1310 | !skb_queue_empty(&sta->ps_tx_buf[ac])) { | |
1311 | more_data = true; | |
1312 | break; | |
1313 | } | |
af818581 | 1314 | } |
af818581 | 1315 | |
f9f760b4 | 1316 | if (skb_queue_empty(&frames) && !driver_release_tids) { |
ce662b44 | 1317 | int tid; |
af818581 JB |
1318 | |
1319 | /* | |
ce662b44 JB |
1320 | * For PS-Poll, this can only happen due to a race condition |
1321 | * when we set the TIM bit and the station notices it, but | |
1322 | * before it can poll for the frame we expire it. | |
1323 | * | |
1324 | * For uAPSD, this is said in the standard (11.2.1.5 h): | |
1325 | * At each unscheduled SP for a non-AP STA, the AP shall | |
1326 | * attempt to transmit at least one MSDU or MMPDU, but no | |
1327 | * more than the value specified in the Max SP Length field | |
1328 | * in the QoS Capability element from delivery-enabled ACs, | |
1329 | * that are destined for the non-AP STA. | |
1330 | * | |
1331 | * Since we have no other MSDU/MMPDU, transmit a QoS null frame. | |
af818581 | 1332 | */ |
af818581 | 1333 | |
ce662b44 JB |
1334 | /* This will evaluate to 1, 3, 5 or 7. */ |
1335 | tid = 7 - ((ffs(~ignored_acs) - 1) << 1); | |
af818581 | 1336 | |
40b96408 | 1337 | ieee80211_send_null_response(sdata, sta, tid, reason); |
f9f760b4 | 1338 | } else if (!driver_release_tids) { |
47086fc5 JB |
1339 | struct sk_buff_head pending; |
1340 | struct sk_buff *skb; | |
40b96408 JB |
1341 | int num = 0; |
1342 | u16 tids = 0; | |
af818581 | 1343 | |
47086fc5 | 1344 | skb_queue_head_init(&pending); |
af818581 | 1345 | |
47086fc5 JB |
1346 | while ((skb = __skb_dequeue(&frames))) { |
1347 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1348 | struct ieee80211_hdr *hdr = (void *) skb->data; | |
40b96408 JB |
1349 | u8 *qoshdr = NULL; |
1350 | ||
1351 | num++; | |
af818581 | 1352 | |
47086fc5 JB |
1353 | /* |
1354 | * Tell TX path to send this frame even though the | |
1355 | * STA may still remain is PS mode after this frame | |
1356 | * exchange. | |
1357 | */ | |
d6d23de2 FF |
1358 | info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER | |
1359 | IEEE80211_TX_CTL_PS_RESPONSE; | |
47086fc5 JB |
1360 | |
1361 | /* | |
1362 | * Use MoreData flag to indicate whether there are | |
1363 | * more buffered frames for this STA | |
1364 | */ | |
24b9c373 | 1365 | if (more_data || !skb_queue_empty(&frames)) |
47086fc5 JB |
1366 | hdr->frame_control |= |
1367 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
24b9c373 JD |
1368 | else |
1369 | hdr->frame_control &= | |
1370 | cpu_to_le16(~IEEE80211_FCTL_MOREDATA); | |
47086fc5 | 1371 | |
40b96408 JB |
1372 | if (ieee80211_is_data_qos(hdr->frame_control) || |
1373 | ieee80211_is_qos_nullfunc(hdr->frame_control)) | |
1374 | qoshdr = ieee80211_get_qos_ctl(hdr); | |
1375 | ||
52a3f20c MP |
1376 | /* end service period after last frame */ |
1377 | if (skb_queue_empty(&frames)) { | |
1378 | if (reason == IEEE80211_FRAME_RELEASE_UAPSD && | |
1379 | qoshdr) | |
1380 | *qoshdr |= IEEE80211_QOS_CTL_EOSP; | |
1381 | ||
1382 | info->flags |= IEEE80211_TX_STATUS_EOSP | | |
1383 | IEEE80211_TX_CTL_REQ_TX_STATUS; | |
1384 | } | |
deeaee19 | 1385 | |
40b96408 JB |
1386 | if (qoshdr) |
1387 | tids |= BIT(*qoshdr & IEEE80211_QOS_CTL_TID_MASK); | |
1388 | else | |
1389 | tids |= BIT(0); | |
1390 | ||
47086fc5 JB |
1391 | __skb_queue_tail(&pending, skb); |
1392 | } | |
af818581 | 1393 | |
40b96408 JB |
1394 | drv_allow_buffered_frames(local, sta, tids, num, |
1395 | reason, more_data); | |
1396 | ||
47086fc5 | 1397 | ieee80211_add_pending_skbs(local, &pending); |
af818581 | 1398 | |
c868cb35 | 1399 | sta_info_recalc_tim(sta); |
af818581 JB |
1400 | } else { |
1401 | /* | |
4049e09a JB |
1402 | * We need to release a frame that is buffered somewhere in the |
1403 | * driver ... it'll have to handle that. | |
f9f760b4 JB |
1404 | * Note that the driver also has to check the number of frames |
1405 | * on the TIDs we're releasing from - if there are more than | |
1406 | * n_frames it has to set the more-data bit (if we didn't ask | |
1407 | * it to set it anyway due to other buffered frames); if there | |
1408 | * are fewer than n_frames it has to make sure to adjust that | |
1409 | * to allow the service period to end properly. | |
4049e09a JB |
1410 | */ |
1411 | drv_release_buffered_frames(local, sta, driver_release_tids, | |
47086fc5 | 1412 | n_frames, reason, more_data); |
4049e09a JB |
1413 | |
1414 | /* | |
1415 | * Note that we don't recalculate the TIM bit here as it would | |
1416 | * most likely have no effect at all unless the driver told us | |
f9f760b4 | 1417 | * that the TID(s) became empty before returning here from the |
4049e09a | 1418 | * release function. |
f9f760b4 | 1419 | * Either way, however, when the driver tells us that the TID(s) |
4049e09a | 1420 | * became empty we'll do the TIM recalculation. |
af818581 | 1421 | */ |
af818581 JB |
1422 | } |
1423 | } | |
1424 | ||
47086fc5 JB |
1425 | void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta) |
1426 | { | |
1427 | u8 ignore_for_response = sta->sta.uapsd_queues; | |
1428 | ||
1429 | /* | |
1430 | * If all ACs are delivery-enabled then we should reply | |
1431 | * from any of them, if only some are enabled we reply | |
1432 | * only from the non-enabled ones. | |
1433 | */ | |
1434 | if (ignore_for_response == BIT(IEEE80211_NUM_ACS) - 1) | |
1435 | ignore_for_response = 0; | |
1436 | ||
1437 | ieee80211_sta_ps_deliver_response(sta, 1, ignore_for_response, | |
1438 | IEEE80211_FRAME_RELEASE_PSPOLL); | |
1439 | } | |
1440 | ||
1441 | void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta) | |
1442 | { | |
1443 | int n_frames = sta->sta.max_sp; | |
1444 | u8 delivery_enabled = sta->sta.uapsd_queues; | |
1445 | ||
1446 | /* | |
1447 | * If we ever grow support for TSPEC this might happen if | |
1448 | * the TSPEC update from hostapd comes in between a trigger | |
1449 | * frame setting WLAN_STA_UAPSD in the RX path and this | |
1450 | * actually getting called. | |
1451 | */ | |
1452 | if (!delivery_enabled) | |
1453 | return; | |
1454 | ||
47086fc5 JB |
1455 | switch (sta->sta.max_sp) { |
1456 | case 1: | |
1457 | n_frames = 2; | |
1458 | break; | |
1459 | case 2: | |
1460 | n_frames = 4; | |
1461 | break; | |
1462 | case 3: | |
1463 | n_frames = 6; | |
1464 | break; | |
1465 | case 0: | |
1466 | /* XXX: what is a good value? */ | |
1467 | n_frames = 8; | |
1468 | break; | |
1469 | } | |
1470 | ||
1471 | ieee80211_sta_ps_deliver_response(sta, n_frames, ~delivery_enabled, | |
1472 | IEEE80211_FRAME_RELEASE_UAPSD); | |
1473 | } | |
1474 | ||
af818581 JB |
1475 | void ieee80211_sta_block_awake(struct ieee80211_hw *hw, |
1476 | struct ieee80211_sta *pubsta, bool block) | |
1477 | { | |
1478 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
1479 | ||
b5878a2d JB |
1480 | trace_api_sta_block_awake(sta->local, pubsta, block); |
1481 | ||
af818581 | 1482 | if (block) |
c2c98fde JB |
1483 | set_sta_flag(sta, WLAN_STA_PS_DRIVER); |
1484 | else if (test_sta_flag(sta, WLAN_STA_PS_DRIVER)) | |
af818581 JB |
1485 | ieee80211_queue_work(hw, &sta->drv_unblock_wk); |
1486 | } | |
1487 | EXPORT_SYMBOL(ieee80211_sta_block_awake); | |
dcf55fb5 | 1488 | |
e943789e | 1489 | void ieee80211_sta_eosp(struct ieee80211_sta *pubsta) |
37fbd908 JB |
1490 | { |
1491 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
1492 | struct ieee80211_local *local = sta->local; | |
37fbd908 JB |
1493 | |
1494 | trace_api_eosp(local, pubsta); | |
1495 | ||
e943789e | 1496 | clear_sta_flag(sta, WLAN_STA_SP); |
37fbd908 | 1497 | } |
e943789e | 1498 | EXPORT_SYMBOL(ieee80211_sta_eosp); |
37fbd908 | 1499 | |
042ec453 JB |
1500 | void ieee80211_sta_set_buffered(struct ieee80211_sta *pubsta, |
1501 | u8 tid, bool buffered) | |
dcf55fb5 FF |
1502 | { |
1503 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
1504 | ||
5a306f58 | 1505 | if (WARN_ON(tid >= IEEE80211_NUM_TIDS)) |
042ec453 JB |
1506 | return; |
1507 | ||
1b000789 JB |
1508 | trace_api_sta_set_buffered(sta->local, pubsta, tid, buffered); |
1509 | ||
948d887d JB |
1510 | if (buffered) |
1511 | set_bit(tid, &sta->driver_buffered_tids); | |
1512 | else | |
1513 | clear_bit(tid, &sta->driver_buffered_tids); | |
1514 | ||
c868cb35 | 1515 | sta_info_recalc_tim(sta); |
dcf55fb5 | 1516 | } |
042ec453 | 1517 | EXPORT_SYMBOL(ieee80211_sta_set_buffered); |
d9a7ddb0 | 1518 | |
83d5cc01 JB |
1519 | int sta_info_move_state(struct sta_info *sta, |
1520 | enum ieee80211_sta_state new_state) | |
d9a7ddb0 | 1521 | { |
8bf11d8d | 1522 | might_sleep(); |
d9a7ddb0 JB |
1523 | |
1524 | if (sta->sta_state == new_state) | |
1525 | return 0; | |
1526 | ||
f09603a2 JB |
1527 | /* check allowed transitions first */ |
1528 | ||
1529 | switch (new_state) { | |
1530 | case IEEE80211_STA_NONE: | |
1531 | if (sta->sta_state != IEEE80211_STA_AUTH) | |
1532 | return -EINVAL; | |
1533 | break; | |
1534 | case IEEE80211_STA_AUTH: | |
1535 | if (sta->sta_state != IEEE80211_STA_NONE && | |
1536 | sta->sta_state != IEEE80211_STA_ASSOC) | |
1537 | return -EINVAL; | |
1538 | break; | |
1539 | case IEEE80211_STA_ASSOC: | |
1540 | if (sta->sta_state != IEEE80211_STA_AUTH && | |
1541 | sta->sta_state != IEEE80211_STA_AUTHORIZED) | |
1542 | return -EINVAL; | |
1543 | break; | |
1544 | case IEEE80211_STA_AUTHORIZED: | |
1545 | if (sta->sta_state != IEEE80211_STA_ASSOC) | |
1546 | return -EINVAL; | |
1547 | break; | |
1548 | default: | |
1549 | WARN(1, "invalid state %d", new_state); | |
1550 | return -EINVAL; | |
1551 | } | |
1552 | ||
bdcbd8e0 JB |
1553 | sta_dbg(sta->sdata, "moving STA %pM to state %d\n", |
1554 | sta->sta.addr, new_state); | |
f09603a2 JB |
1555 | |
1556 | /* | |
1557 | * notify the driver before the actual changes so it can | |
1558 | * fail the transition | |
1559 | */ | |
1560 | if (test_sta_flag(sta, WLAN_STA_INSERTED)) { | |
1561 | int err = drv_sta_state(sta->local, sta->sdata, sta, | |
1562 | sta->sta_state, new_state); | |
1563 | if (err) | |
1564 | return err; | |
1565 | } | |
1566 | ||
1567 | /* reflect the change in all state variables */ | |
1568 | ||
d9a7ddb0 JB |
1569 | switch (new_state) { |
1570 | case IEEE80211_STA_NONE: | |
1571 | if (sta->sta_state == IEEE80211_STA_AUTH) | |
1572 | clear_bit(WLAN_STA_AUTH, &sta->_flags); | |
d9a7ddb0 JB |
1573 | break; |
1574 | case IEEE80211_STA_AUTH: | |
1575 | if (sta->sta_state == IEEE80211_STA_NONE) | |
1576 | set_bit(WLAN_STA_AUTH, &sta->_flags); | |
1577 | else if (sta->sta_state == IEEE80211_STA_ASSOC) | |
1578 | clear_bit(WLAN_STA_ASSOC, &sta->_flags); | |
d9a7ddb0 JB |
1579 | break; |
1580 | case IEEE80211_STA_ASSOC: | |
29623892 | 1581 | if (sta->sta_state == IEEE80211_STA_AUTH) { |
d9a7ddb0 | 1582 | set_bit(WLAN_STA_ASSOC, &sta->_flags); |
29623892 | 1583 | } else if (sta->sta_state == IEEE80211_STA_AUTHORIZED) { |
7e3ed02c FF |
1584 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP || |
1585 | (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
1586 | !sta->sdata->u.vlan.sta)) | |
1587 | atomic_dec(&sta->sdata->bss->num_mcast_sta); | |
d9a7ddb0 | 1588 | clear_bit(WLAN_STA_AUTHORIZED, &sta->_flags); |
f09603a2 | 1589 | } |
d9a7ddb0 JB |
1590 | break; |
1591 | case IEEE80211_STA_AUTHORIZED: | |
29623892 | 1592 | if (sta->sta_state == IEEE80211_STA_ASSOC) { |
7e3ed02c FF |
1593 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP || |
1594 | (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
1595 | !sta->sdata->u.vlan.sta)) | |
1596 | atomic_inc(&sta->sdata->bss->num_mcast_sta); | |
d9a7ddb0 | 1597 | set_bit(WLAN_STA_AUTHORIZED, &sta->_flags); |
f09603a2 | 1598 | } |
d9a7ddb0 JB |
1599 | break; |
1600 | default: | |
f09603a2 | 1601 | break; |
d9a7ddb0 JB |
1602 | } |
1603 | ||
d9a7ddb0 JB |
1604 | sta->sta_state = new_state; |
1605 | ||
1606 | return 0; | |
1607 | } | |
687da132 EG |
1608 | |
1609 | u8 sta_info_tx_streams(struct sta_info *sta) | |
1610 | { | |
1611 | struct ieee80211_sta_ht_cap *ht_cap = &sta->sta.ht_cap; | |
1612 | u8 rx_streams; | |
1613 | ||
1614 | if (!sta->sta.ht_cap.ht_supported) | |
1615 | return 1; | |
1616 | ||
1617 | if (sta->sta.vht_cap.vht_supported) { | |
1618 | int i; | |
1619 | u16 tx_mcs_map = | |
1620 | le16_to_cpu(sta->sta.vht_cap.vht_mcs.tx_mcs_map); | |
1621 | ||
1622 | for (i = 7; i >= 0; i--) | |
1623 | if ((tx_mcs_map & (0x3 << (i * 2))) != | |
1624 | IEEE80211_VHT_MCS_NOT_SUPPORTED) | |
1625 | return i + 1; | |
1626 | } | |
1627 | ||
1628 | if (ht_cap->mcs.rx_mask[3]) | |
1629 | rx_streams = 4; | |
1630 | else if (ht_cap->mcs.rx_mask[2]) | |
1631 | rx_streams = 3; | |
1632 | else if (ht_cap->mcs.rx_mask[1]) | |
1633 | rx_streams = 2; | |
1634 | else | |
1635 | rx_streams = 1; | |
1636 | ||
1637 | if (!(ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_RX_DIFF)) | |
1638 | return rx_streams; | |
1639 | ||
1640 | return ((ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK) | |
1641 | >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT) + 1; | |
1642 | } |