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