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 | ||
5108ca82 | 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 | |
e3685e03 JB |
102 | if (test_sta_flag(sta, WLAN_STA_PS_STA) || |
103 | test_sta_flag(sta, WLAN_STA_PS_DRIVER)) { | |
d012a605 MP |
104 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP || |
105 | sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
106 | ps = &sdata->bss->ps; | |
3f52b7e3 MP |
107 | else if (ieee80211_vif_is_mesh(&sdata->vif)) |
108 | ps = &sdata->u.mesh.ps; | |
d012a605 MP |
109 | else |
110 | return; | |
b22cfcfc EP |
111 | |
112 | clear_sta_flag(sta, WLAN_STA_PS_STA); | |
e3685e03 | 113 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); |
b22cfcfc | 114 | |
d012a605 | 115 | atomic_dec(&ps->num_sta_ps); |
b22cfcfc EP |
116 | sta_info_recalc_tim(sta); |
117 | } | |
118 | ||
119 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { | |
120 | local->total_ps_buffered -= skb_queue_len(&sta->ps_tx_buf[ac]); | |
1f98ab7f FF |
121 | ieee80211_purge_tx_queue(&local->hw, &sta->ps_tx_buf[ac]); |
122 | ieee80211_purge_tx_queue(&local->hw, &sta->tx_filtered[ac]); | |
b22cfcfc EP |
123 | } |
124 | ||
45b5028e TP |
125 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
126 | mesh_sta_cleanup(sta); | |
b22cfcfc EP |
127 | |
128 | cancel_work_sync(&sta->drv_unblock_wk); | |
129 | ||
130 | /* | |
131 | * Destroy aggregation state here. It would be nice to wait for the | |
132 | * driver to finish aggregation stop and then clean up, but for now | |
133 | * drivers have to handle aggregation stop being requested, followed | |
134 | * directly by station destruction. | |
135 | */ | |
5a306f58 | 136 | for (i = 0; i < IEEE80211_NUM_TIDS; i++) { |
661eb381 | 137 | kfree(sta->ampdu_mlme.tid_start_tx[i]); |
b22cfcfc EP |
138 | tid_tx = rcu_dereference_raw(sta->ampdu_mlme.tid_tx[i]); |
139 | if (!tid_tx) | |
140 | continue; | |
1f98ab7f | 141 | ieee80211_purge_tx_queue(&local->hw, &tid_tx->pending); |
b22cfcfc EP |
142 | kfree(tid_tx); |
143 | } | |
5108ca82 | 144 | } |
b22cfcfc | 145 | |
5108ca82 JB |
146 | static void cleanup_single_sta(struct sta_info *sta) |
147 | { | |
148 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
149 | struct ieee80211_local *local = sdata->local; | |
150 | ||
151 | __cleanup_single_sta(sta); | |
b22cfcfc EP |
152 | sta_info_free(local, sta); |
153 | } | |
154 | ||
d0709a65 | 155 | /* protected by RCU */ |
abe60632 JB |
156 | struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata, |
157 | const u8 *addr) | |
f0706e82 | 158 | { |
abe60632 | 159 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
160 | struct sta_info *sta; |
161 | ||
0379185b | 162 | sta = rcu_dereference_check(local->sta_hash[STA_HASH(addr)], |
0379185b | 163 | lockdep_is_held(&local->sta_mtx)); |
f0706e82 | 164 | while (sta) { |
abe60632 | 165 | if (sta->sdata == sdata && |
b203ca39 | 166 | ether_addr_equal(sta->sta.addr, addr)) |
f0706e82 | 167 | break; |
0379185b | 168 | sta = rcu_dereference_check(sta->hnext, |
0379185b | 169 | lockdep_is_held(&local->sta_mtx)); |
f0706e82 | 170 | } |
43ba7e95 JB |
171 | return sta; |
172 | } | |
173 | ||
0e5ded5a FF |
174 | /* |
175 | * Get sta info either from the specified interface | |
176 | * or from one of its vlans | |
177 | */ | |
178 | struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata, | |
179 | const u8 *addr) | |
180 | { | |
181 | struct ieee80211_local *local = sdata->local; | |
182 | struct sta_info *sta; | |
183 | ||
0379185b | 184 | sta = rcu_dereference_check(local->sta_hash[STA_HASH(addr)], |
0379185b | 185 | lockdep_is_held(&local->sta_mtx)); |
0e5ded5a FF |
186 | while (sta) { |
187 | if ((sta->sdata == sdata || | |
a2c1e3da | 188 | (sta->sdata->bss && sta->sdata->bss == sdata->bss)) && |
b203ca39 | 189 | ether_addr_equal(sta->sta.addr, addr)) |
0e5ded5a | 190 | break; |
0379185b | 191 | sta = rcu_dereference_check(sta->hnext, |
0379185b | 192 | lockdep_is_held(&local->sta_mtx)); |
0e5ded5a FF |
193 | } |
194 | return sta; | |
195 | } | |
196 | ||
3b53fde8 JB |
197 | struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata, |
198 | int idx) | |
ee385855 | 199 | { |
3b53fde8 | 200 | struct ieee80211_local *local = sdata->local; |
ee385855 LCC |
201 | struct sta_info *sta; |
202 | int i = 0; | |
203 | ||
d0709a65 | 204 | list_for_each_entry_rcu(sta, &local->sta_list, list) { |
3b53fde8 | 205 | if (sdata != sta->sdata) |
2a8ca29a | 206 | continue; |
ee385855 LCC |
207 | if (i < idx) { |
208 | ++i; | |
209 | continue; | |
ee385855 | 210 | } |
2a8ca29a | 211 | return sta; |
ee385855 | 212 | } |
ee385855 LCC |
213 | |
214 | return NULL; | |
215 | } | |
f0706e82 | 216 | |
93e5deb1 | 217 | /** |
d9a7ddb0 | 218 | * sta_info_free - free STA |
93e5deb1 | 219 | * |
6ef307bc | 220 | * @local: pointer to the global information |
93e5deb1 JB |
221 | * @sta: STA info to free |
222 | * | |
223 | * This function must undo everything done by sta_info_alloc() | |
d9a7ddb0 JB |
224 | * that may happen before sta_info_insert(). It may only be |
225 | * called when sta_info_insert() has not been attempted (and | |
226 | * if that fails, the station is freed anyway.) | |
93e5deb1 | 227 | */ |
d9a7ddb0 | 228 | void sta_info_free(struct ieee80211_local *local, struct sta_info *sta) |
93e5deb1 | 229 | { |
ad38bfc9 MG |
230 | int i; |
231 | ||
889cbb91 | 232 | if (sta->rate_ctrl) |
af65cd96 | 233 | rate_control_free_sta(sta); |
93e5deb1 | 234 | |
ad38bfc9 MG |
235 | if (sta->tx_lat) { |
236 | for (i = 0; i < IEEE80211_NUM_TIDS; i++) | |
237 | kfree(sta->tx_lat[i].bins); | |
238 | kfree(sta->tx_lat); | |
239 | } | |
240 | ||
bdcbd8e0 | 241 | sta_dbg(sta->sdata, "Destroyed STA %pM\n", sta->sta.addr); |
93e5deb1 JB |
242 | |
243 | kfree(sta); | |
244 | } | |
245 | ||
4d33960b | 246 | /* Caller must hold local->sta_mtx */ |
d0709a65 JB |
247 | static void sta_info_hash_add(struct ieee80211_local *local, |
248 | struct sta_info *sta) | |
f0706e82 | 249 | { |
4d33960b | 250 | lockdep_assert_held(&local->sta_mtx); |
17741cdc | 251 | sta->hnext = local->sta_hash[STA_HASH(sta->sta.addr)]; |
cf778b00 | 252 | rcu_assign_pointer(local->sta_hash[STA_HASH(sta->sta.addr)], sta); |
f0706e82 | 253 | } |
f0706e82 | 254 | |
af818581 JB |
255 | static void sta_unblock(struct work_struct *wk) |
256 | { | |
257 | struct sta_info *sta; | |
258 | ||
259 | sta = container_of(wk, struct sta_info, drv_unblock_wk); | |
260 | ||
261 | if (sta->dead) | |
262 | return; | |
263 | ||
54420473 HS |
264 | if (!test_sta_flag(sta, WLAN_STA_PS_STA)) { |
265 | local_bh_disable(); | |
af818581 | 266 | ieee80211_sta_ps_deliver_wakeup(sta); |
54420473 HS |
267 | local_bh_enable(); |
268 | } else if (test_and_clear_sta_flag(sta, WLAN_STA_PSPOLL)) { | |
c2c98fde | 269 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); |
ce662b44 JB |
270 | |
271 | local_bh_disable(); | |
af818581 | 272 | ieee80211_sta_ps_deliver_poll_response(sta); |
ce662b44 | 273 | local_bh_enable(); |
c2c98fde JB |
274 | } else if (test_and_clear_sta_flag(sta, WLAN_STA_UAPSD)) { |
275 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); | |
ce662b44 JB |
276 | |
277 | local_bh_disable(); | |
47086fc5 | 278 | ieee80211_sta_ps_deliver_uapsd(sta); |
ce662b44 | 279 | local_bh_enable(); |
50a9432d | 280 | } else |
c2c98fde | 281 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); |
af818581 JB |
282 | } |
283 | ||
af65cd96 JB |
284 | static int sta_prepare_rate_control(struct ieee80211_local *local, |
285 | struct sta_info *sta, gfp_t gfp) | |
286 | { | |
287 | if (local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL) | |
288 | return 0; | |
289 | ||
889cbb91 | 290 | sta->rate_ctrl = local->rate_ctrl; |
af65cd96 JB |
291 | sta->rate_ctrl_priv = rate_control_alloc_sta(sta->rate_ctrl, |
292 | &sta->sta, gfp); | |
889cbb91 | 293 | if (!sta->rate_ctrl_priv) |
af65cd96 | 294 | return -ENOMEM; |
af65cd96 JB |
295 | |
296 | return 0; | |
297 | } | |
298 | ||
73651ee6 | 299 | struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata, |
56544160 | 300 | const u8 *addr, gfp_t gfp) |
f0706e82 | 301 | { |
d0709a65 | 302 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 303 | struct sta_info *sta; |
ebe27c91 | 304 | struct timespec uptime; |
ad38bfc9 | 305 | struct ieee80211_tx_latency_bin_ranges *tx_latency; |
16c5f15c | 306 | int i; |
f0706e82 | 307 | |
17741cdc | 308 | sta = kzalloc(sizeof(*sta) + local->hw.sta_data_size, gfp); |
f0706e82 | 309 | if (!sta) |
73651ee6 | 310 | return NULL; |
f0706e82 | 311 | |
ef04a297 JB |
312 | rcu_read_lock(); |
313 | tx_latency = rcu_dereference(local->tx_latency); | |
314 | /* init stations Tx latency statistics && TID bins */ | |
315 | if (tx_latency) { | |
316 | sta->tx_lat = kzalloc(IEEE80211_NUM_TIDS * | |
317 | sizeof(struct ieee80211_tx_latency_stat), | |
318 | GFP_ATOMIC); | |
319 | if (!sta->tx_lat) { | |
320 | rcu_read_unlock(); | |
321 | goto free; | |
322 | } | |
323 | ||
324 | if (tx_latency->n_ranges) { | |
325 | for (i = 0; i < IEEE80211_NUM_TIDS; i++) { | |
326 | /* size of bins is size of the ranges +1 */ | |
327 | sta->tx_lat[i].bin_count = | |
328 | tx_latency->n_ranges + 1; | |
329 | sta->tx_lat[i].bins = | |
330 | kcalloc(sta->tx_lat[i].bin_count, | |
331 | sizeof(u32), GFP_ATOMIC); | |
332 | if (!sta->tx_lat[i].bins) { | |
333 | rcu_read_unlock(); | |
334 | goto free; | |
335 | } | |
336 | } | |
337 | } | |
338 | } | |
339 | rcu_read_unlock(); | |
340 | ||
07346f81 | 341 | spin_lock_init(&sta->lock); |
1d147bfa | 342 | spin_lock_init(&sta->ps_lock); |
af818581 | 343 | INIT_WORK(&sta->drv_unblock_wk, sta_unblock); |
67c282c0 | 344 | INIT_WORK(&sta->ampdu_mlme.work, ieee80211_ba_session_work); |
a93e3644 | 345 | mutex_init(&sta->ampdu_mlme.mtx); |
87f59c70 TP |
346 | #ifdef CONFIG_MAC80211_MESH |
347 | if (ieee80211_vif_is_mesh(&sdata->vif) && | |
348 | !sdata->u.mesh.user_mpm) | |
349 | init_timer(&sta->plink_timer); | |
6c7c4cbf | 350 | sta->nonpeer_pm = NL80211_MESH_POWER_ACTIVE; |
87f59c70 | 351 | #endif |
07346f81 | 352 | |
17741cdc | 353 | memcpy(sta->sta.addr, addr, ETH_ALEN); |
d0709a65 JB |
354 | sta->local = local; |
355 | sta->sdata = sdata; | |
8bc8aecd | 356 | sta->last_rx = jiffies; |
f0706e82 | 357 | |
71ec375c JB |
358 | sta->sta_state = IEEE80211_STA_NONE; |
359 | ||
ebe27c91 MSS |
360 | do_posix_clock_monotonic_gettime(&uptime); |
361 | sta->last_connected = uptime.tv_sec; | |
541a45a1 | 362 | ewma_init(&sta->avg_signal, 1024, 8); |
ef0621e8 FF |
363 | for (i = 0; i < ARRAY_SIZE(sta->chain_signal_avg); i++) |
364 | ewma_init(&sta->chain_signal_avg[i], 1024, 8); | |
541a45a1 | 365 | |
ef04a297 JB |
366 | if (sta_prepare_rate_control(local, sta, gfp)) |
367 | goto free; | |
f0706e82 | 368 | |
5a306f58 | 369 | for (i = 0; i < IEEE80211_NUM_TIDS; i++) { |
a622ab72 JB |
370 | /* |
371 | * timer_to_tid must be initialized with identity mapping | |
372 | * to enable session_timer's data differentiation. See | |
373 | * sta_rx_agg_session_timer_expired for usage. | |
374 | */ | |
16c5f15c | 375 | sta->timer_to_tid[i] = i; |
16c5f15c | 376 | } |
948d887d JB |
377 | for (i = 0; i < IEEE80211_NUM_ACS; i++) { |
378 | skb_queue_head_init(&sta->ps_tx_buf[i]); | |
379 | skb_queue_head_init(&sta->tx_filtered[i]); | |
380 | } | |
73651ee6 | 381 | |
5a306f58 | 382 | for (i = 0; i < IEEE80211_NUM_TIDS; i++) |
4be929be | 383 | sta->last_seq_ctrl[i] = cpu_to_le16(USHRT_MAX); |
cccaec98 | 384 | |
af0ed69b | 385 | sta->sta.smps_mode = IEEE80211_SMPS_OFF; |
687da132 EG |
386 | if (sdata->vif.type == NL80211_IFTYPE_AP || |
387 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { | |
388 | struct ieee80211_supported_band *sband = | |
389 | local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)]; | |
390 | u8 smps = (sband->ht_cap.cap & IEEE80211_HT_CAP_SM_PS) >> | |
391 | IEEE80211_HT_CAP_SM_PS_SHIFT; | |
392 | /* | |
393 | * Assume that hostapd advertises our caps in the beacon and | |
394 | * this is the known_smps_mode for a station that just assciated | |
395 | */ | |
396 | switch (smps) { | |
397 | case WLAN_HT_SMPS_CONTROL_DISABLED: | |
398 | sta->known_smps_mode = IEEE80211_SMPS_OFF; | |
399 | break; | |
400 | case WLAN_HT_SMPS_CONTROL_STATIC: | |
401 | sta->known_smps_mode = IEEE80211_SMPS_STATIC; | |
402 | break; | |
403 | case WLAN_HT_SMPS_CONTROL_DYNAMIC: | |
404 | sta->known_smps_mode = IEEE80211_SMPS_DYNAMIC; | |
405 | break; | |
406 | default: | |
407 | WARN_ON(1); | |
408 | } | |
409 | } | |
af0ed69b | 410 | |
bdcbd8e0 | 411 | sta_dbg(sdata, "Allocated STA %pM\n", sta->sta.addr); |
73651ee6 | 412 | return sta; |
ef04a297 JB |
413 | |
414 | free: | |
415 | if (sta->tx_lat) { | |
416 | for (i = 0; i < IEEE80211_NUM_TIDS; i++) | |
417 | kfree(sta->tx_lat[i].bins); | |
418 | kfree(sta->tx_lat); | |
419 | } | |
420 | kfree(sta); | |
421 | return NULL; | |
73651ee6 JB |
422 | } |
423 | ||
8c71df7a | 424 | static int sta_info_insert_check(struct sta_info *sta) |
34e89507 | 425 | { |
34e89507 | 426 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
34e89507 | 427 | |
03e4497e JB |
428 | /* |
429 | * Can't be a WARN_ON because it can be triggered through a race: | |
430 | * something inserts a STA (on one CPU) without holding the RTNL | |
431 | * and another CPU turns off the net device. | |
432 | */ | |
8c71df7a GE |
433 | if (unlikely(!ieee80211_sdata_running(sdata))) |
434 | return -ENETDOWN; | |
03e4497e | 435 | |
b203ca39 | 436 | if (WARN_ON(ether_addr_equal(sta->sta.addr, sdata->vif.addr) || |
8c71df7a GE |
437 | is_multicast_ether_addr(sta->sta.addr))) |
438 | return -EINVAL; | |
439 | ||
440 | return 0; | |
441 | } | |
442 | ||
f09603a2 JB |
443 | static int sta_info_insert_drv_state(struct ieee80211_local *local, |
444 | struct ieee80211_sub_if_data *sdata, | |
445 | struct sta_info *sta) | |
446 | { | |
447 | enum ieee80211_sta_state state; | |
448 | int err = 0; | |
449 | ||
450 | for (state = IEEE80211_STA_NOTEXIST; state < sta->sta_state; state++) { | |
451 | err = drv_sta_state(local, sdata, sta, state, state + 1); | |
452 | if (err) | |
453 | break; | |
454 | } | |
455 | ||
456 | if (!err) { | |
a4ec45a4 JB |
457 | /* |
458 | * Drivers using legacy sta_add/sta_remove callbacks only | |
459 | * get uploaded set to true after sta_add is called. | |
460 | */ | |
461 | if (!local->ops->sta_add) | |
462 | sta->uploaded = true; | |
f09603a2 JB |
463 | return 0; |
464 | } | |
465 | ||
466 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { | |
bdcbd8e0 JB |
467 | sdata_info(sdata, |
468 | "failed to move IBSS STA %pM to state %d (%d) - keeping it anyway\n", | |
469 | sta->sta.addr, state + 1, err); | |
f09603a2 JB |
470 | err = 0; |
471 | } | |
472 | ||
473 | /* unwind on error */ | |
474 | for (; state > IEEE80211_STA_NOTEXIST; state--) | |
475 | WARN_ON(drv_sta_state(local, sdata, sta, state, state - 1)); | |
476 | ||
477 | return err; | |
478 | } | |
479 | ||
8c71df7a GE |
480 | /* |
481 | * should be called with sta_mtx locked | |
482 | * this function replaces the mutex lock | |
483 | * with a RCU lock | |
484 | */ | |
4d33960b | 485 | static int sta_info_insert_finish(struct sta_info *sta) __acquires(RCU) |
8c71df7a GE |
486 | { |
487 | struct ieee80211_local *local = sta->local; | |
488 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
7852e361 | 489 | struct station_info sinfo; |
8c71df7a GE |
490 | int err = 0; |
491 | ||
492 | lockdep_assert_held(&local->sta_mtx); | |
34e89507 | 493 | |
7852e361 JB |
494 | /* check if STA exists already */ |
495 | if (sta_info_get_bss(sdata, sta->sta.addr)) { | |
496 | err = -EEXIST; | |
497 | goto out_err; | |
4d33960b | 498 | } |
32bfd35d | 499 | |
7852e361 JB |
500 | local->num_sta++; |
501 | local->sta_generation++; | |
502 | smp_mb(); | |
4d33960b | 503 | |
5108ca82 JB |
504 | /* simplify things and don't accept BA sessions yet */ |
505 | set_sta_flag(sta, WLAN_STA_BLOCK_BA); | |
506 | ||
7852e361 JB |
507 | /* make the station visible */ |
508 | sta_info_hash_add(local, sta); | |
83d5cc01 | 509 | |
794454ce | 510 | list_add_rcu(&sta->list, &local->sta_list); |
4d33960b | 511 | |
5108ca82 JB |
512 | /* notify driver */ |
513 | err = sta_info_insert_drv_state(local, sdata, sta); | |
514 | if (err) | |
515 | goto out_remove; | |
516 | ||
7852e361 | 517 | set_sta_flag(sta, WLAN_STA_INSERTED); |
5108ca82 JB |
518 | /* accept BA sessions now */ |
519 | clear_sta_flag(sta, WLAN_STA_BLOCK_BA); | |
4d33960b | 520 | |
21f659bf | 521 | ieee80211_recalc_min_chandef(sdata); |
7852e361 JB |
522 | ieee80211_sta_debugfs_add(sta); |
523 | rate_control_add_sta_debugfs(sta); | |
4d33960b | 524 | |
7852e361 JB |
525 | memset(&sinfo, 0, sizeof(sinfo)); |
526 | sinfo.filled = 0; | |
527 | sinfo.generation = local->sta_generation; | |
528 | cfg80211_new_sta(sdata->dev, sta->sta.addr, &sinfo, GFP_KERNEL); | |
d0709a65 | 529 | |
bdcbd8e0 | 530 | sta_dbg(sdata, "Inserted STA %pM\n", sta->sta.addr); |
f0706e82 | 531 | |
34e89507 JB |
532 | /* move reference to rcu-protected */ |
533 | rcu_read_lock(); | |
534 | mutex_unlock(&local->sta_mtx); | |
e9f207f0 | 535 | |
73651ee6 JB |
536 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
537 | mesh_accept_plinks_update(sdata); | |
538 | ||
8c71df7a | 539 | return 0; |
5108ca82 JB |
540 | out_remove: |
541 | sta_info_hash_del(local, sta); | |
542 | list_del_rcu(&sta->list); | |
543 | local->num_sta--; | |
544 | synchronize_net(); | |
545 | __cleanup_single_sta(sta); | |
4d33960b JB |
546 | out_err: |
547 | mutex_unlock(&local->sta_mtx); | |
548 | rcu_read_lock(); | |
549 | return err; | |
8c71df7a GE |
550 | } |
551 | ||
552 | int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU) | |
553 | { | |
554 | struct ieee80211_local *local = sta->local; | |
8c71df7a GE |
555 | int err = 0; |
556 | ||
4d33960b JB |
557 | might_sleep(); |
558 | ||
8c71df7a GE |
559 | err = sta_info_insert_check(sta); |
560 | if (err) { | |
561 | rcu_read_lock(); | |
562 | goto out_free; | |
563 | } | |
564 | ||
8c71df7a GE |
565 | mutex_lock(&local->sta_mtx); |
566 | ||
4d33960b | 567 | err = sta_info_insert_finish(sta); |
8c71df7a GE |
568 | if (err) |
569 | goto out_free; | |
570 | ||
73651ee6 | 571 | return 0; |
93e5deb1 JB |
572 | out_free: |
573 | BUG_ON(!err); | |
d9a7ddb0 | 574 | sta_info_free(local, sta); |
93e5deb1 | 575 | return err; |
f0706e82 JB |
576 | } |
577 | ||
34e89507 JB |
578 | int sta_info_insert(struct sta_info *sta) |
579 | { | |
580 | int err = sta_info_insert_rcu(sta); | |
581 | ||
582 | rcu_read_unlock(); | |
583 | ||
584 | return err; | |
585 | } | |
586 | ||
d012a605 | 587 | static inline void __bss_tim_set(u8 *tim, u16 id) |
004c872e JB |
588 | { |
589 | /* | |
590 | * This format has been mandated by the IEEE specifications, | |
591 | * so this line may not be changed to use the __set_bit() format. | |
592 | */ | |
d012a605 | 593 | tim[id / 8] |= (1 << (id % 8)); |
004c872e JB |
594 | } |
595 | ||
d012a605 | 596 | static inline void __bss_tim_clear(u8 *tim, u16 id) |
004c872e JB |
597 | { |
598 | /* | |
599 | * This format has been mandated by the IEEE specifications, | |
600 | * so this line may not be changed to use the __clear_bit() format. | |
601 | */ | |
d012a605 | 602 | tim[id / 8] &= ~(1 << (id % 8)); |
004c872e JB |
603 | } |
604 | ||
3d5839b6 IP |
605 | static inline bool __bss_tim_get(u8 *tim, u16 id) |
606 | { | |
607 | /* | |
608 | * This format has been mandated by the IEEE specifications, | |
609 | * so this line may not be changed to use the test_bit() format. | |
610 | */ | |
611 | return tim[id / 8] & (1 << (id % 8)); | |
612 | } | |
613 | ||
948d887d | 614 | static unsigned long ieee80211_tids_for_ac(int ac) |
004c872e | 615 | { |
948d887d JB |
616 | /* If we ever support TIDs > 7, this obviously needs to be adjusted */ |
617 | switch (ac) { | |
618 | case IEEE80211_AC_VO: | |
619 | return BIT(6) | BIT(7); | |
620 | case IEEE80211_AC_VI: | |
621 | return BIT(4) | BIT(5); | |
622 | case IEEE80211_AC_BE: | |
623 | return BIT(0) | BIT(3); | |
624 | case IEEE80211_AC_BK: | |
625 | return BIT(1) | BIT(2); | |
626 | default: | |
627 | WARN_ON(1); | |
628 | return 0; | |
d0709a65 | 629 | } |
004c872e JB |
630 | } |
631 | ||
c868cb35 | 632 | void sta_info_recalc_tim(struct sta_info *sta) |
004c872e | 633 | { |
c868cb35 | 634 | struct ieee80211_local *local = sta->local; |
d012a605 | 635 | struct ps_data *ps; |
948d887d JB |
636 | bool indicate_tim = false; |
637 | u8 ignore_for_tim = sta->sta.uapsd_queues; | |
638 | int ac; | |
d012a605 MP |
639 | u16 id; |
640 | ||
641 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP || | |
642 | sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { | |
643 | if (WARN_ON_ONCE(!sta->sdata->bss)) | |
644 | return; | |
004c872e | 645 | |
d012a605 MP |
646 | ps = &sta->sdata->bss->ps; |
647 | id = sta->sta.aid; | |
3f52b7e3 MP |
648 | #ifdef CONFIG_MAC80211_MESH |
649 | } else if (ieee80211_vif_is_mesh(&sta->sdata->vif)) { | |
650 | ps = &sta->sdata->u.mesh.ps; | |
204d1304 | 651 | /* TIM map only for 1 <= PLID <= IEEE80211_MAX_AID */ |
6f101ef0 | 652 | id = sta->plid % (IEEE80211_MAX_AID + 1); |
3f52b7e3 | 653 | #endif |
d012a605 | 654 | } else { |
c868cb35 | 655 | return; |
d012a605 | 656 | } |
3e122be0 | 657 | |
c868cb35 JB |
658 | /* No need to do anything if the driver does all */ |
659 | if (local->hw.flags & IEEE80211_HW_AP_LINK_PS) | |
660 | return; | |
004c872e | 661 | |
c868cb35 JB |
662 | if (sta->dead) |
663 | goto done; | |
3e122be0 | 664 | |
948d887d JB |
665 | /* |
666 | * If all ACs are delivery-enabled then we should build | |
667 | * the TIM bit for all ACs anyway; if only some are then | |
668 | * we ignore those and build the TIM bit using only the | |
669 | * non-enabled ones. | |
670 | */ | |
671 | if (ignore_for_tim == BIT(IEEE80211_NUM_ACS) - 1) | |
672 | ignore_for_tim = 0; | |
673 | ||
674 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { | |
675 | unsigned long tids; | |
3e122be0 | 676 | |
948d887d JB |
677 | if (ignore_for_tim & BIT(ac)) |
678 | continue; | |
679 | ||
680 | indicate_tim |= !skb_queue_empty(&sta->tx_filtered[ac]) || | |
681 | !skb_queue_empty(&sta->ps_tx_buf[ac]); | |
682 | if (indicate_tim) | |
683 | break; | |
3e122be0 | 684 | |
948d887d JB |
685 | tids = ieee80211_tids_for_ac(ac); |
686 | ||
687 | indicate_tim |= | |
688 | sta->driver_buffered_tids & tids; | |
d0709a65 | 689 | } |
004c872e | 690 | |
c868cb35 | 691 | done: |
65f704a5 | 692 | spin_lock_bh(&local->tim_lock); |
004c872e | 693 | |
3d5839b6 IP |
694 | if (indicate_tim == __bss_tim_get(ps->tim, id)) |
695 | goto out_unlock; | |
696 | ||
948d887d | 697 | if (indicate_tim) |
d012a605 | 698 | __bss_tim_set(ps->tim, id); |
c868cb35 | 699 | else |
d012a605 | 700 | __bss_tim_clear(ps->tim, id); |
004c872e | 701 | |
c868cb35 JB |
702 | if (local->ops->set_tim) { |
703 | local->tim_in_locked_section = true; | |
948d887d | 704 | drv_set_tim(local, &sta->sta, indicate_tim); |
c868cb35 JB |
705 | local->tim_in_locked_section = false; |
706 | } | |
3e122be0 | 707 | |
3d5839b6 | 708 | out_unlock: |
65f704a5 | 709 | spin_unlock_bh(&local->tim_lock); |
004c872e JB |
710 | } |
711 | ||
cd0b8d89 | 712 | static bool sta_info_buffer_expired(struct sta_info *sta, struct sk_buff *skb) |
f0706e82 | 713 | { |
e039fa4a | 714 | struct ieee80211_tx_info *info; |
f0706e82 JB |
715 | int timeout; |
716 | ||
717 | if (!skb) | |
cd0b8d89 | 718 | return false; |
f0706e82 | 719 | |
e039fa4a | 720 | info = IEEE80211_SKB_CB(skb); |
f0706e82 JB |
721 | |
722 | /* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */ | |
57c4d7b4 JB |
723 | timeout = (sta->listen_interval * |
724 | sta->sdata->vif.bss_conf.beacon_int * | |
725 | 32 / 15625) * HZ; | |
f0706e82 JB |
726 | if (timeout < STA_TX_BUFFER_EXPIRE) |
727 | timeout = STA_TX_BUFFER_EXPIRE; | |
e039fa4a | 728 | return time_after(jiffies, info->control.jiffies + timeout); |
f0706e82 JB |
729 | } |
730 | ||
731 | ||
948d887d JB |
732 | static bool sta_info_cleanup_expire_buffered_ac(struct ieee80211_local *local, |
733 | struct sta_info *sta, int ac) | |
f0706e82 JB |
734 | { |
735 | unsigned long flags; | |
736 | struct sk_buff *skb; | |
737 | ||
60750397 JB |
738 | /* |
739 | * First check for frames that should expire on the filtered | |
740 | * queue. Frames here were rejected by the driver and are on | |
741 | * a separate queue to avoid reordering with normal PS-buffered | |
742 | * frames. They also aren't accounted for right now in the | |
743 | * total_ps_buffered counter. | |
744 | */ | |
745 | for (;;) { | |
948d887d JB |
746 | spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags); |
747 | skb = skb_peek(&sta->tx_filtered[ac]); | |
60750397 | 748 | if (sta_info_buffer_expired(sta, skb)) |
948d887d | 749 | skb = __skb_dequeue(&sta->tx_filtered[ac]); |
60750397 JB |
750 | else |
751 | skb = NULL; | |
948d887d | 752 | spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags); |
60750397 JB |
753 | |
754 | /* | |
755 | * Frames are queued in order, so if this one | |
756 | * hasn't expired yet we can stop testing. If | |
757 | * we actually reached the end of the queue we | |
758 | * also need to stop, of course. | |
759 | */ | |
760 | if (!skb) | |
761 | break; | |
d4fa14cd | 762 | ieee80211_free_txskb(&local->hw, skb); |
60750397 JB |
763 | } |
764 | ||
765 | /* | |
766 | * Now also check the normal PS-buffered queue, this will | |
767 | * only find something if the filtered queue was emptied | |
768 | * since the filtered frames are all before the normal PS | |
769 | * buffered frames. | |
770 | */ | |
f0706e82 | 771 | for (;;) { |
948d887d JB |
772 | spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags); |
773 | skb = skb_peek(&sta->ps_tx_buf[ac]); | |
57c4d7b4 | 774 | if (sta_info_buffer_expired(sta, skb)) |
948d887d | 775 | skb = __skb_dequeue(&sta->ps_tx_buf[ac]); |
836341a7 | 776 | else |
f0706e82 | 777 | skb = NULL; |
948d887d | 778 | spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags); |
f0706e82 | 779 | |
60750397 JB |
780 | /* |
781 | * frames are queued in order, so if this one | |
782 | * hasn't expired yet (or we reached the end of | |
783 | * the queue) we can stop testing | |
784 | */ | |
836341a7 | 785 | if (!skb) |
f0706e82 | 786 | break; |
836341a7 | 787 | |
836341a7 | 788 | local->total_ps_buffered--; |
bdcbd8e0 JB |
789 | ps_dbg(sta->sdata, "Buffered frame expired (STA %pM)\n", |
790 | sta->sta.addr); | |
d4fa14cd | 791 | ieee80211_free_txskb(&local->hw, skb); |
f0706e82 | 792 | } |
3393a608 | 793 | |
60750397 JB |
794 | /* |
795 | * Finally, recalculate the TIM bit for this station -- it might | |
796 | * now be clear because the station was too slow to retrieve its | |
797 | * frames. | |
798 | */ | |
799 | sta_info_recalc_tim(sta); | |
800 | ||
801 | /* | |
802 | * Return whether there are any frames still buffered, this is | |
803 | * used to check whether the cleanup timer still needs to run, | |
804 | * if there are no frames we don't need to rearm the timer. | |
805 | */ | |
948d887d JB |
806 | return !(skb_queue_empty(&sta->ps_tx_buf[ac]) && |
807 | skb_queue_empty(&sta->tx_filtered[ac])); | |
808 | } | |
809 | ||
810 | static bool sta_info_cleanup_expire_buffered(struct ieee80211_local *local, | |
811 | struct sta_info *sta) | |
812 | { | |
813 | bool have_buffered = false; | |
814 | int ac; | |
815 | ||
3f52b7e3 MP |
816 | /* This is only necessary for stations on BSS/MBSS interfaces */ |
817 | if (!sta->sdata->bss && | |
818 | !ieee80211_vif_is_mesh(&sta->sdata->vif)) | |
948d887d JB |
819 | return false; |
820 | ||
821 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) | |
822 | have_buffered |= | |
823 | sta_info_cleanup_expire_buffered_ac(local, sta, ac); | |
824 | ||
825 | return have_buffered; | |
f0706e82 JB |
826 | } |
827 | ||
d778207b | 828 | static int __must_check __sta_info_destroy_part1(struct sta_info *sta) |
f0706e82 | 829 | { |
34e89507 JB |
830 | struct ieee80211_local *local; |
831 | struct ieee80211_sub_if_data *sdata; | |
6d10e46b | 832 | int ret; |
f0706e82 | 833 | |
34e89507 | 834 | might_sleep(); |
f0706e82 | 835 | |
34e89507 JB |
836 | if (!sta) |
837 | return -ENOENT; | |
5bb644a0 | 838 | |
34e89507 JB |
839 | local = sta->local; |
840 | sdata = sta->sdata; | |
f0706e82 | 841 | |
83d5cc01 JB |
842 | lockdep_assert_held(&local->sta_mtx); |
843 | ||
098a6070 JB |
844 | /* |
845 | * Before removing the station from the driver and | |
846 | * rate control, it might still start new aggregation | |
847 | * sessions -- block that to make sure the tear-down | |
848 | * will be sufficient. | |
849 | */ | |
c2c98fde | 850 | set_sta_flag(sta, WLAN_STA_BLOCK_BA); |
c82c4a80 | 851 | ieee80211_sta_tear_down_BA_sessions(sta, AGG_STOP_DESTROY_STA); |
098a6070 | 852 | |
34e89507 | 853 | ret = sta_info_hash_del(local, sta); |
b01711be | 854 | if (WARN_ON(ret)) |
34e89507 JB |
855 | return ret; |
856 | ||
794454ce | 857 | list_del_rcu(&sta->list); |
4d33960b | 858 | |
6a9d1b91 JB |
859 | drv_sta_pre_rcu_remove(local, sta->sdata, sta); |
860 | ||
a710c816 JB |
861 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN && |
862 | rcu_access_pointer(sdata->u.vlan.sta) == sta) | |
863 | RCU_INIT_POINTER(sdata->u.vlan.sta, NULL); | |
864 | ||
d778207b JB |
865 | return 0; |
866 | } | |
867 | ||
868 | static void __sta_info_destroy_part2(struct sta_info *sta) | |
869 | { | |
870 | struct ieee80211_local *local = sta->local; | |
871 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
872 | int ret; | |
873 | ||
874 | /* | |
875 | * NOTE: This assumes at least synchronize_net() was done | |
876 | * after _part1 and before _part2! | |
877 | */ | |
878 | ||
879 | might_sleep(); | |
880 | lockdep_assert_held(&local->sta_mtx); | |
881 | ||
c8782078 | 882 | /* now keys can no longer be reached */ |
6d10e46b | 883 | ieee80211_free_sta_keys(local, sta); |
34e89507 JB |
884 | |
885 | sta->dead = true; | |
886 | ||
34e89507 JB |
887 | local->num_sta--; |
888 | local->sta_generation++; | |
889 | ||
83d5cc01 | 890 | while (sta->sta_state > IEEE80211_STA_NONE) { |
f09603a2 JB |
891 | ret = sta_info_move_state(sta, sta->sta_state - 1); |
892 | if (ret) { | |
83d5cc01 JB |
893 | WARN_ON_ONCE(1); |
894 | break; | |
895 | } | |
896 | } | |
d9a7ddb0 | 897 | |
f09603a2 | 898 | if (sta->uploaded) { |
f09603a2 JB |
899 | ret = drv_sta_state(local, sdata, sta, IEEE80211_STA_NONE, |
900 | IEEE80211_STA_NOTEXIST); | |
901 | WARN_ON_ONCE(ret != 0); | |
902 | } | |
34e89507 | 903 | |
bdcbd8e0 JB |
904 | sta_dbg(sdata, "Removed STA %pM\n", sta->sta.addr); |
905 | ||
ec15e68b JM |
906 | cfg80211_del_sta(sdata->dev, sta->sta.addr, GFP_KERNEL); |
907 | ||
34e89507 JB |
908 | rate_control_remove_sta_debugfs(sta); |
909 | ieee80211_sta_debugfs_remove(sta); | |
21f659bf | 910 | ieee80211_recalc_min_chandef(sdata); |
34e89507 | 911 | |
d34ba216 | 912 | cleanup_single_sta(sta); |
d778207b JB |
913 | } |
914 | ||
915 | int __must_check __sta_info_destroy(struct sta_info *sta) | |
916 | { | |
917 | int err = __sta_info_destroy_part1(sta); | |
918 | ||
919 | if (err) | |
920 | return err; | |
921 | ||
922 | synchronize_net(); | |
923 | ||
924 | __sta_info_destroy_part2(sta); | |
34e89507 JB |
925 | |
926 | return 0; | |
4d6141c3 JS |
927 | } |
928 | ||
34e89507 | 929 | int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, const u8 *addr) |
4d6141c3 | 930 | { |
34e89507 JB |
931 | struct sta_info *sta; |
932 | int ret; | |
4d6141c3 | 933 | |
34e89507 | 934 | mutex_lock(&sdata->local->sta_mtx); |
7852e361 | 935 | sta = sta_info_get(sdata, addr); |
34e89507 JB |
936 | ret = __sta_info_destroy(sta); |
937 | mutex_unlock(&sdata->local->sta_mtx); | |
4d6141c3 JS |
938 | |
939 | return ret; | |
940 | } | |
941 | ||
34e89507 JB |
942 | int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata, |
943 | const u8 *addr) | |
e9f207f0 | 944 | { |
34e89507 JB |
945 | struct sta_info *sta; |
946 | int ret; | |
e9f207f0 | 947 | |
34e89507 | 948 | mutex_lock(&sdata->local->sta_mtx); |
7852e361 | 949 | sta = sta_info_get_bss(sdata, addr); |
34e89507 JB |
950 | ret = __sta_info_destroy(sta); |
951 | mutex_unlock(&sdata->local->sta_mtx); | |
d0709a65 | 952 | |
34e89507 JB |
953 | return ret; |
954 | } | |
e9f207f0 | 955 | |
34e89507 JB |
956 | static void sta_info_cleanup(unsigned long data) |
957 | { | |
958 | struct ieee80211_local *local = (struct ieee80211_local *) data; | |
959 | struct sta_info *sta; | |
3393a608 | 960 | bool timer_needed = false; |
34e89507 JB |
961 | |
962 | rcu_read_lock(); | |
963 | list_for_each_entry_rcu(sta, &local->sta_list, list) | |
3393a608 JO |
964 | if (sta_info_cleanup_expire_buffered(local, sta)) |
965 | timer_needed = true; | |
34e89507 | 966 | rcu_read_unlock(); |
e9f207f0 | 967 | |
34e89507 JB |
968 | if (local->quiescing) |
969 | return; | |
d0709a65 | 970 | |
3393a608 JO |
971 | if (!timer_needed) |
972 | return; | |
973 | ||
26d59535 JB |
974 | mod_timer(&local->sta_cleanup, |
975 | round_jiffies(jiffies + STA_INFO_CLEANUP_INTERVAL)); | |
e9f207f0 | 976 | } |
e9f207f0 | 977 | |
f0706e82 JB |
978 | void sta_info_init(struct ieee80211_local *local) |
979 | { | |
4d33960b | 980 | spin_lock_init(&local->tim_lock); |
34e89507 | 981 | mutex_init(&local->sta_mtx); |
f0706e82 | 982 | INIT_LIST_HEAD(&local->sta_list); |
f0706e82 | 983 | |
b24b8a24 PE |
984 | setup_timer(&local->sta_cleanup, sta_info_cleanup, |
985 | (unsigned long)local); | |
f0706e82 JB |
986 | } |
987 | ||
988 | void sta_info_stop(struct ieee80211_local *local) | |
989 | { | |
a56f992c | 990 | del_timer_sync(&local->sta_cleanup); |
f0706e82 JB |
991 | } |
992 | ||
051007d9 | 993 | |
e716251d | 994 | int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans) |
f0706e82 | 995 | { |
b998e8bb | 996 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 997 | struct sta_info *sta, *tmp; |
d778207b | 998 | LIST_HEAD(free_list); |
44213b5e | 999 | int ret = 0; |
f0706e82 | 1000 | |
d0709a65 | 1001 | might_sleep(); |
be8755e1 | 1002 | |
e716251d JB |
1003 | WARN_ON(vlans && sdata->vif.type != NL80211_IFTYPE_AP); |
1004 | WARN_ON(vlans && !sdata->bss); | |
1005 | ||
34e89507 | 1006 | mutex_lock(&local->sta_mtx); |
d0709a65 | 1007 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { |
e716251d JB |
1008 | if (sdata == sta->sdata || |
1009 | (vlans && sdata->bss == sta->sdata->bss)) { | |
d778207b JB |
1010 | if (!WARN_ON(__sta_info_destroy_part1(sta))) |
1011 | list_add(&sta->free_list, &free_list); | |
34316837 JB |
1012 | ret++; |
1013 | } | |
be8755e1 | 1014 | } |
d778207b JB |
1015 | |
1016 | if (!list_empty(&free_list)) { | |
1017 | synchronize_net(); | |
1018 | list_for_each_entry_safe(sta, tmp, &free_list, free_list) | |
1019 | __sta_info_destroy_part2(sta); | |
1020 | } | |
34e89507 | 1021 | mutex_unlock(&local->sta_mtx); |
44213b5e | 1022 | |
051007d9 JB |
1023 | return ret; |
1024 | } | |
1025 | ||
24723d1b JB |
1026 | void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, |
1027 | unsigned long exp_time) | |
1028 | { | |
1029 | struct ieee80211_local *local = sdata->local; | |
1030 | struct sta_info *sta, *tmp; | |
24723d1b | 1031 | |
34e89507 | 1032 | mutex_lock(&local->sta_mtx); |
e46a2cf9 MSS |
1033 | |
1034 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { | |
ec2b774e ML |
1035 | if (sdata != sta->sdata) |
1036 | continue; | |
1037 | ||
24723d1b | 1038 | if (time_after(jiffies, sta->last_rx + exp_time)) { |
eea57d42 MSS |
1039 | sta_dbg(sta->sdata, "expiring inactive STA %pM\n", |
1040 | sta->sta.addr); | |
3f52b7e3 MP |
1041 | |
1042 | if (ieee80211_vif_is_mesh(&sdata->vif) && | |
1043 | test_sta_flag(sta, WLAN_STA_PS_STA)) | |
1044 | atomic_dec(&sdata->u.mesh.ps.num_sta_ps); | |
1045 | ||
34e89507 | 1046 | WARN_ON(__sta_info_destroy(sta)); |
24723d1b | 1047 | } |
e46a2cf9 MSS |
1048 | } |
1049 | ||
34e89507 | 1050 | mutex_unlock(&local->sta_mtx); |
24723d1b | 1051 | } |
17741cdc | 1052 | |
686b9cb9 BG |
1053 | struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw, |
1054 | const u8 *addr, | |
1055 | const u8 *localaddr) | |
17741cdc | 1056 | { |
abe60632 | 1057 | struct sta_info *sta, *nxt; |
17741cdc | 1058 | |
686b9cb9 BG |
1059 | /* |
1060 | * Just return a random station if localaddr is NULL | |
1061 | * ... first in list. | |
1062 | */ | |
f7c65594 | 1063 | for_each_sta_info(hw_to_local(hw), addr, sta, nxt) { |
686b9cb9 | 1064 | if (localaddr && |
b203ca39 | 1065 | !ether_addr_equal(sta->sdata->vif.addr, localaddr)) |
686b9cb9 | 1066 | continue; |
f7c65594 JB |
1067 | if (!sta->uploaded) |
1068 | return NULL; | |
abe60632 | 1069 | return &sta->sta; |
f7c65594 JB |
1070 | } |
1071 | ||
abe60632 | 1072 | return NULL; |
17741cdc | 1073 | } |
686b9cb9 | 1074 | EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_ifaddr); |
5ed176e1 JB |
1075 | |
1076 | struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif, | |
1077 | const u8 *addr) | |
1078 | { | |
f7c65594 | 1079 | struct sta_info *sta; |
5ed176e1 JB |
1080 | |
1081 | if (!vif) | |
1082 | return NULL; | |
1083 | ||
f7c65594 JB |
1084 | sta = sta_info_get_bss(vif_to_sdata(vif), addr); |
1085 | if (!sta) | |
1086 | return NULL; | |
1087 | ||
1088 | if (!sta->uploaded) | |
1089 | return NULL; | |
5ed176e1 | 1090 | |
f7c65594 | 1091 | return &sta->sta; |
5ed176e1 | 1092 | } |
17741cdc | 1093 | EXPORT_SYMBOL(ieee80211_find_sta); |
af818581 | 1094 | |
e3685e03 JB |
1095 | /* powersave support code */ |
1096 | void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta) | |
50a9432d | 1097 | { |
608383bf | 1098 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
e3685e03 JB |
1099 | struct ieee80211_local *local = sdata->local; |
1100 | struct sk_buff_head pending; | |
1101 | int filtered = 0, buffered = 0, ac; | |
1102 | unsigned long flags; | |
d012a605 MP |
1103 | struct ps_data *ps; |
1104 | ||
1105 | if (sdata->vif.type == NL80211_IFTYPE_AP || | |
1106 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
1107 | ps = &sdata->bss->ps; | |
3f52b7e3 MP |
1108 | else if (ieee80211_vif_is_mesh(&sdata->vif)) |
1109 | ps = &sdata->u.mesh.ps; | |
d012a605 MP |
1110 | else |
1111 | return; | |
50a9432d | 1112 | |
c2c98fde | 1113 | clear_sta_flag(sta, WLAN_STA_SP); |
47086fc5 | 1114 | |
5a306f58 | 1115 | BUILD_BUG_ON(BITS_TO_LONGS(IEEE80211_NUM_TIDS) > 1); |
948d887d | 1116 | sta->driver_buffered_tids = 0; |
af818581 | 1117 | |
d057e5a3 AN |
1118 | if (!(local->hw.flags & IEEE80211_HW_AP_LINK_PS)) |
1119 | drv_sta_notify(local, sdata, STA_NOTIFY_AWAKE, &sta->sta); | |
af818581 | 1120 | |
948d887d | 1121 | skb_queue_head_init(&pending); |
af818581 | 1122 | |
1d147bfa EG |
1123 | /* sync with ieee80211_tx_h_unicast_ps_buf */ |
1124 | spin_lock(&sta->ps_lock); | |
af818581 | 1125 | /* Send all buffered frames to the station */ |
948d887d JB |
1126 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { |
1127 | int count = skb_queue_len(&pending), tmp; | |
1128 | ||
987c285c | 1129 | spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags); |
948d887d | 1130 | skb_queue_splice_tail_init(&sta->tx_filtered[ac], &pending); |
987c285c | 1131 | spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags); |
948d887d JB |
1132 | tmp = skb_queue_len(&pending); |
1133 | filtered += tmp - count; | |
1134 | count = tmp; | |
1135 | ||
987c285c | 1136 | spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags); |
948d887d | 1137 | skb_queue_splice_tail_init(&sta->ps_tx_buf[ac], &pending); |
987c285c | 1138 | spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags); |
948d887d JB |
1139 | tmp = skb_queue_len(&pending); |
1140 | buffered += tmp - count; | |
1141 | } | |
1142 | ||
e3685e03 JB |
1143 | ieee80211_add_pending_skbs(local, &pending); |
1144 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); | |
1145 | clear_sta_flag(sta, WLAN_STA_PS_STA); | |
1d147bfa | 1146 | spin_unlock(&sta->ps_lock); |
948d887d | 1147 | |
e3685e03 JB |
1148 | atomic_dec(&ps->num_sta_ps); |
1149 | ||
687da132 EG |
1150 | /* This station just woke up and isn't aware of our SMPS state */ |
1151 | if (!ieee80211_smps_is_restrictive(sta->known_smps_mode, | |
1152 | sdata->smps_mode) && | |
1153 | sta->known_smps_mode != sdata->bss->req_smps && | |
1154 | sta_info_tx_streams(sta) != 1) { | |
1155 | ht_dbg(sdata, | |
1156 | "%pM just woke up and MIMO capable - update SMPS\n", | |
1157 | sta->sta.addr); | |
1158 | ieee80211_send_smps_action(sdata, sdata->bss->req_smps, | |
1159 | sta->sta.addr, | |
1160 | sdata->vif.bss_conf.bssid); | |
1161 | } | |
1162 | ||
af818581 JB |
1163 | local->total_ps_buffered -= buffered; |
1164 | ||
c868cb35 JB |
1165 | sta_info_recalc_tim(sta); |
1166 | ||
bdcbd8e0 JB |
1167 | ps_dbg(sdata, |
1168 | "STA %pM aid %d sending %d filtered/%d PS frames since STA not sleeping anymore\n", | |
1169 | sta->sta.addr, sta->sta.aid, filtered, buffered); | |
af818581 JB |
1170 | } |
1171 | ||
ce662b44 JB |
1172 | static void ieee80211_send_null_response(struct ieee80211_sub_if_data *sdata, |
1173 | struct sta_info *sta, int tid, | |
b77cf4f8 JB |
1174 | enum ieee80211_frame_release_type reason, |
1175 | bool call_driver) | |
af818581 | 1176 | { |
af818581 | 1177 | struct ieee80211_local *local = sdata->local; |
ce662b44 | 1178 | struct ieee80211_qos_hdr *nullfunc; |
af818581 | 1179 | struct sk_buff *skb; |
ce662b44 JB |
1180 | int size = sizeof(*nullfunc); |
1181 | __le16 fc; | |
c2c98fde | 1182 | bool qos = test_sta_flag(sta, WLAN_STA_WME); |
ce662b44 | 1183 | struct ieee80211_tx_info *info; |
55de908a | 1184 | struct ieee80211_chanctx_conf *chanctx_conf; |
af818581 | 1185 | |
ce662b44 JB |
1186 | if (qos) { |
1187 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | | |
1188 | IEEE80211_STYPE_QOS_NULLFUNC | | |
1189 | IEEE80211_FCTL_FROMDS); | |
1190 | } else { | |
1191 | size -= 2; | |
1192 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | | |
1193 | IEEE80211_STYPE_NULLFUNC | | |
1194 | IEEE80211_FCTL_FROMDS); | |
af818581 | 1195 | } |
af818581 | 1196 | |
ce662b44 JB |
1197 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + size); |
1198 | if (!skb) | |
1199 | return; | |
1200 | ||
1201 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
1202 | ||
1203 | nullfunc = (void *) skb_put(skb, size); | |
1204 | nullfunc->frame_control = fc; | |
1205 | nullfunc->duration_id = 0; | |
1206 | memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN); | |
1207 | memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); | |
1208 | memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN); | |
864a6040 | 1209 | nullfunc->seq_ctrl = 0; |
ce662b44 | 1210 | |
59b66255 JB |
1211 | skb->priority = tid; |
1212 | skb_set_queue_mapping(skb, ieee802_1d_to_ac[tid]); | |
ce662b44 | 1213 | if (qos) { |
ce662b44 JB |
1214 | nullfunc->qos_ctrl = cpu_to_le16(tid); |
1215 | ||
40b96408 | 1216 | if (reason == IEEE80211_FRAME_RELEASE_UAPSD) |
ce662b44 JB |
1217 | nullfunc->qos_ctrl |= |
1218 | cpu_to_le16(IEEE80211_QOS_CTL_EOSP); | |
1219 | } | |
1220 | ||
1221 | info = IEEE80211_SKB_CB(skb); | |
1222 | ||
1223 | /* | |
1224 | * Tell TX path to send this frame even though the | |
1225 | * STA may still remain is PS mode after this frame | |
deeaee19 JB |
1226 | * exchange. Also set EOSP to indicate this packet |
1227 | * ends the poll/service period. | |
ce662b44 | 1228 | */ |
02f2f1a9 | 1229 | info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER | |
d6d23de2 | 1230 | IEEE80211_TX_CTL_PS_RESPONSE | |
deeaee19 JB |
1231 | IEEE80211_TX_STATUS_EOSP | |
1232 | IEEE80211_TX_CTL_REQ_TX_STATUS; | |
ce662b44 | 1233 | |
b77cf4f8 JB |
1234 | if (call_driver) |
1235 | drv_allow_buffered_frames(local, sta, BIT(tid), 1, | |
1236 | reason, false); | |
40b96408 | 1237 | |
89afe614 JB |
1238 | skb->dev = sdata->dev; |
1239 | ||
55de908a JB |
1240 | rcu_read_lock(); |
1241 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
1242 | if (WARN_ON(!chanctx_conf)) { | |
1243 | rcu_read_unlock(); | |
1244 | kfree_skb(skb); | |
1245 | return; | |
1246 | } | |
1247 | ||
4bf88530 | 1248 | ieee80211_xmit(sdata, skb, chanctx_conf->def.chan->band); |
55de908a | 1249 | rcu_read_unlock(); |
ce662b44 JB |
1250 | } |
1251 | ||
0a1cb809 JB |
1252 | static int find_highest_prio_tid(unsigned long tids) |
1253 | { | |
1254 | /* lower 3 TIDs aren't ordered perfectly */ | |
1255 | if (tids & 0xF8) | |
1256 | return fls(tids) - 1; | |
1257 | /* TID 0 is BE just like TID 3 */ | |
1258 | if (tids & BIT(0)) | |
1259 | return 0; | |
1260 | return fls(tids) - 1; | |
1261 | } | |
1262 | ||
47086fc5 JB |
1263 | static void |
1264 | ieee80211_sta_ps_deliver_response(struct sta_info *sta, | |
1265 | int n_frames, u8 ignored_acs, | |
1266 | enum ieee80211_frame_release_type reason) | |
af818581 JB |
1267 | { |
1268 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
1269 | struct ieee80211_local *local = sdata->local; | |
948d887d JB |
1270 | bool more_data = false; |
1271 | int ac; | |
4049e09a | 1272 | unsigned long driver_release_tids = 0; |
47086fc5 | 1273 | struct sk_buff_head frames; |
af818581 | 1274 | |
deeaee19 | 1275 | /* Service or PS-Poll period starts */ |
c2c98fde | 1276 | set_sta_flag(sta, WLAN_STA_SP); |
deeaee19 | 1277 | |
47086fc5 | 1278 | __skb_queue_head_init(&frames); |
948d887d | 1279 | |
f9f760b4 | 1280 | /* Get response frame(s) and more data bit for the last one. */ |
948d887d | 1281 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { |
4049e09a JB |
1282 | unsigned long tids; |
1283 | ||
47086fc5 | 1284 | if (ignored_acs & BIT(ac)) |
948d887d JB |
1285 | continue; |
1286 | ||
4049e09a JB |
1287 | tids = ieee80211_tids_for_ac(ac); |
1288 | ||
f9f760b4 JB |
1289 | /* if we already have frames from software, then we can't also |
1290 | * release from hardware queues | |
1291 | */ | |
1292 | if (skb_queue_empty(&frames)) | |
1293 | driver_release_tids |= sta->driver_buffered_tids & tids; | |
948d887d | 1294 | |
f9f760b4 JB |
1295 | if (driver_release_tids) { |
1296 | /* If the driver has data on more than one TID then | |
4049e09a | 1297 | * certainly there's more data if we release just a |
f9f760b4 JB |
1298 | * single frame now (from a single TID). This will |
1299 | * only happen for PS-Poll. | |
4049e09a | 1300 | */ |
47086fc5 JB |
1301 | if (reason == IEEE80211_FRAME_RELEASE_PSPOLL && |
1302 | hweight16(driver_release_tids) > 1) { | |
4049e09a JB |
1303 | more_data = true; |
1304 | driver_release_tids = | |
0a1cb809 JB |
1305 | BIT(find_highest_prio_tid( |
1306 | driver_release_tids)); | |
4049e09a JB |
1307 | break; |
1308 | } | |
f9f760b4 JB |
1309 | } else { |
1310 | struct sk_buff *skb; | |
1311 | ||
1312 | while (n_frames > 0) { | |
1313 | skb = skb_dequeue(&sta->tx_filtered[ac]); | |
1314 | if (!skb) { | |
1315 | skb = skb_dequeue( | |
1316 | &sta->ps_tx_buf[ac]); | |
1317 | if (skb) | |
1318 | local->total_ps_buffered--; | |
1319 | } | |
1320 | if (!skb) | |
1321 | break; | |
1322 | n_frames--; | |
1323 | __skb_queue_tail(&frames, skb); | |
1324 | } | |
4049e09a | 1325 | } |
948d887d | 1326 | |
f9f760b4 JB |
1327 | /* If we have more frames buffered on this AC, then set the |
1328 | * more-data bit and abort the loop since we can't send more | |
1329 | * data from other ACs before the buffered frames from this. | |
1330 | */ | |
948d887d JB |
1331 | if (!skb_queue_empty(&sta->tx_filtered[ac]) || |
1332 | !skb_queue_empty(&sta->ps_tx_buf[ac])) { | |
1333 | more_data = true; | |
1334 | break; | |
1335 | } | |
af818581 | 1336 | } |
af818581 | 1337 | |
f9f760b4 | 1338 | if (skb_queue_empty(&frames) && !driver_release_tids) { |
ce662b44 | 1339 | int tid; |
af818581 JB |
1340 | |
1341 | /* | |
ce662b44 JB |
1342 | * For PS-Poll, this can only happen due to a race condition |
1343 | * when we set the TIM bit and the station notices it, but | |
1344 | * before it can poll for the frame we expire it. | |
1345 | * | |
1346 | * For uAPSD, this is said in the standard (11.2.1.5 h): | |
1347 | * At each unscheduled SP for a non-AP STA, the AP shall | |
1348 | * attempt to transmit at least one MSDU or MMPDU, but no | |
1349 | * more than the value specified in the Max SP Length field | |
1350 | * in the QoS Capability element from delivery-enabled ACs, | |
1351 | * that are destined for the non-AP STA. | |
1352 | * | |
1353 | * Since we have no other MSDU/MMPDU, transmit a QoS null frame. | |
af818581 | 1354 | */ |
af818581 | 1355 | |
ce662b44 JB |
1356 | /* This will evaluate to 1, 3, 5 or 7. */ |
1357 | tid = 7 - ((ffs(~ignored_acs) - 1) << 1); | |
af818581 | 1358 | |
b77cf4f8 | 1359 | ieee80211_send_null_response(sdata, sta, tid, reason, true); |
f9f760b4 | 1360 | } else if (!driver_release_tids) { |
47086fc5 JB |
1361 | struct sk_buff_head pending; |
1362 | struct sk_buff *skb; | |
40b96408 JB |
1363 | int num = 0; |
1364 | u16 tids = 0; | |
b77cf4f8 | 1365 | bool need_null = false; |
af818581 | 1366 | |
47086fc5 | 1367 | skb_queue_head_init(&pending); |
af818581 | 1368 | |
47086fc5 JB |
1369 | while ((skb = __skb_dequeue(&frames))) { |
1370 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1371 | struct ieee80211_hdr *hdr = (void *) skb->data; | |
40b96408 JB |
1372 | u8 *qoshdr = NULL; |
1373 | ||
1374 | num++; | |
af818581 | 1375 | |
47086fc5 JB |
1376 | /* |
1377 | * Tell TX path to send this frame even though the | |
1378 | * STA may still remain is PS mode after this frame | |
1379 | * exchange. | |
1380 | */ | |
d6d23de2 FF |
1381 | info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER | |
1382 | IEEE80211_TX_CTL_PS_RESPONSE; | |
47086fc5 JB |
1383 | |
1384 | /* | |
1385 | * Use MoreData flag to indicate whether there are | |
1386 | * more buffered frames for this STA | |
1387 | */ | |
24b9c373 | 1388 | if (more_data || !skb_queue_empty(&frames)) |
47086fc5 JB |
1389 | hdr->frame_control |= |
1390 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
24b9c373 JD |
1391 | else |
1392 | hdr->frame_control &= | |
1393 | cpu_to_le16(~IEEE80211_FCTL_MOREDATA); | |
47086fc5 | 1394 | |
40b96408 JB |
1395 | if (ieee80211_is_data_qos(hdr->frame_control) || |
1396 | ieee80211_is_qos_nullfunc(hdr->frame_control)) | |
1397 | qoshdr = ieee80211_get_qos_ctl(hdr); | |
1398 | ||
b77cf4f8 | 1399 | tids |= BIT(skb->priority); |
52a3f20c | 1400 | |
b77cf4f8 JB |
1401 | __skb_queue_tail(&pending, skb); |
1402 | ||
1403 | /* end service period after last frame or add one */ | |
1404 | if (!skb_queue_empty(&frames)) | |
1405 | continue; | |
1406 | ||
1407 | if (reason != IEEE80211_FRAME_RELEASE_UAPSD) { | |
1408 | /* for PS-Poll, there's only one frame */ | |
52a3f20c MP |
1409 | info->flags |= IEEE80211_TX_STATUS_EOSP | |
1410 | IEEE80211_TX_CTL_REQ_TX_STATUS; | |
b77cf4f8 | 1411 | break; |
52a3f20c | 1412 | } |
deeaee19 | 1413 | |
b77cf4f8 JB |
1414 | /* For uAPSD, things are a bit more complicated. If the |
1415 | * last frame has a QoS header (i.e. is a QoS-data or | |
1416 | * QoS-nulldata frame) then just set the EOSP bit there | |
1417 | * and be done. | |
1418 | * If the frame doesn't have a QoS header (which means | |
1419 | * it should be a bufferable MMPDU) then we can't set | |
1420 | * the EOSP bit in the QoS header; add a QoS-nulldata | |
1421 | * frame to the list to send it after the MMPDU. | |
1422 | * | |
1423 | * Note that this code is only in the mac80211-release | |
1424 | * code path, we assume that the driver will not buffer | |
1425 | * anything but QoS-data frames, or if it does, will | |
1426 | * create the QoS-nulldata frame by itself if needed. | |
1427 | * | |
1428 | * Cf. 802.11-2012 10.2.1.10 (c). | |
1429 | */ | |
1430 | if (qoshdr) { | |
1431 | *qoshdr |= IEEE80211_QOS_CTL_EOSP; | |
40b96408 | 1432 | |
b77cf4f8 JB |
1433 | info->flags |= IEEE80211_TX_STATUS_EOSP | |
1434 | IEEE80211_TX_CTL_REQ_TX_STATUS; | |
1435 | } else { | |
1436 | /* The standard isn't completely clear on this | |
1437 | * as it says the more-data bit should be set | |
1438 | * if there are more BUs. The QoS-Null frame | |
1439 | * we're about to send isn't buffered yet, we | |
1440 | * only create it below, but let's pretend it | |
1441 | * was buffered just in case some clients only | |
1442 | * expect more-data=0 when eosp=1. | |
1443 | */ | |
1444 | hdr->frame_control |= | |
1445 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
1446 | need_null = true; | |
1447 | num++; | |
1448 | } | |
1449 | break; | |
47086fc5 | 1450 | } |
af818581 | 1451 | |
40b96408 JB |
1452 | drv_allow_buffered_frames(local, sta, tids, num, |
1453 | reason, more_data); | |
1454 | ||
47086fc5 | 1455 | ieee80211_add_pending_skbs(local, &pending); |
af818581 | 1456 | |
b77cf4f8 JB |
1457 | if (need_null) |
1458 | ieee80211_send_null_response( | |
1459 | sdata, sta, find_highest_prio_tid(tids), | |
1460 | reason, false); | |
1461 | ||
c868cb35 | 1462 | sta_info_recalc_tim(sta); |
af818581 JB |
1463 | } else { |
1464 | /* | |
4049e09a JB |
1465 | * We need to release a frame that is buffered somewhere in the |
1466 | * driver ... it'll have to handle that. | |
f9f760b4 JB |
1467 | * Note that the driver also has to check the number of frames |
1468 | * on the TIDs we're releasing from - if there are more than | |
1469 | * n_frames it has to set the more-data bit (if we didn't ask | |
1470 | * it to set it anyway due to other buffered frames); if there | |
1471 | * are fewer than n_frames it has to make sure to adjust that | |
1472 | * to allow the service period to end properly. | |
4049e09a JB |
1473 | */ |
1474 | drv_release_buffered_frames(local, sta, driver_release_tids, | |
47086fc5 | 1475 | n_frames, reason, more_data); |
4049e09a JB |
1476 | |
1477 | /* | |
1478 | * Note that we don't recalculate the TIM bit here as it would | |
1479 | * most likely have no effect at all unless the driver told us | |
f9f760b4 | 1480 | * that the TID(s) became empty before returning here from the |
4049e09a | 1481 | * release function. |
f9f760b4 | 1482 | * Either way, however, when the driver tells us that the TID(s) |
4049e09a | 1483 | * became empty we'll do the TIM recalculation. |
af818581 | 1484 | */ |
af818581 JB |
1485 | } |
1486 | } | |
1487 | ||
47086fc5 JB |
1488 | void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta) |
1489 | { | |
1490 | u8 ignore_for_response = sta->sta.uapsd_queues; | |
1491 | ||
1492 | /* | |
1493 | * If all ACs are delivery-enabled then we should reply | |
1494 | * from any of them, if only some are enabled we reply | |
1495 | * only from the non-enabled ones. | |
1496 | */ | |
1497 | if (ignore_for_response == BIT(IEEE80211_NUM_ACS) - 1) | |
1498 | ignore_for_response = 0; | |
1499 | ||
1500 | ieee80211_sta_ps_deliver_response(sta, 1, ignore_for_response, | |
1501 | IEEE80211_FRAME_RELEASE_PSPOLL); | |
1502 | } | |
1503 | ||
1504 | void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta) | |
1505 | { | |
1506 | int n_frames = sta->sta.max_sp; | |
1507 | u8 delivery_enabled = sta->sta.uapsd_queues; | |
1508 | ||
1509 | /* | |
1510 | * If we ever grow support for TSPEC this might happen if | |
1511 | * the TSPEC update from hostapd comes in between a trigger | |
1512 | * frame setting WLAN_STA_UAPSD in the RX path and this | |
1513 | * actually getting called. | |
1514 | */ | |
1515 | if (!delivery_enabled) | |
1516 | return; | |
1517 | ||
47086fc5 JB |
1518 | switch (sta->sta.max_sp) { |
1519 | case 1: | |
1520 | n_frames = 2; | |
1521 | break; | |
1522 | case 2: | |
1523 | n_frames = 4; | |
1524 | break; | |
1525 | case 3: | |
1526 | n_frames = 6; | |
1527 | break; | |
1528 | case 0: | |
1529 | /* XXX: what is a good value? */ | |
1530 | n_frames = 8; | |
1531 | break; | |
1532 | } | |
1533 | ||
1534 | ieee80211_sta_ps_deliver_response(sta, n_frames, ~delivery_enabled, | |
1535 | IEEE80211_FRAME_RELEASE_UAPSD); | |
1536 | } | |
1537 | ||
af818581 JB |
1538 | void ieee80211_sta_block_awake(struct ieee80211_hw *hw, |
1539 | struct ieee80211_sta *pubsta, bool block) | |
1540 | { | |
1541 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
1542 | ||
b5878a2d JB |
1543 | trace_api_sta_block_awake(sta->local, pubsta, block); |
1544 | ||
af818581 | 1545 | if (block) |
c2c98fde JB |
1546 | set_sta_flag(sta, WLAN_STA_PS_DRIVER); |
1547 | else if (test_sta_flag(sta, WLAN_STA_PS_DRIVER)) | |
af818581 JB |
1548 | ieee80211_queue_work(hw, &sta->drv_unblock_wk); |
1549 | } | |
1550 | EXPORT_SYMBOL(ieee80211_sta_block_awake); | |
dcf55fb5 | 1551 | |
e943789e | 1552 | void ieee80211_sta_eosp(struct ieee80211_sta *pubsta) |
37fbd908 JB |
1553 | { |
1554 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
1555 | struct ieee80211_local *local = sta->local; | |
37fbd908 JB |
1556 | |
1557 | trace_api_eosp(local, pubsta); | |
1558 | ||
e943789e | 1559 | clear_sta_flag(sta, WLAN_STA_SP); |
37fbd908 | 1560 | } |
e943789e | 1561 | EXPORT_SYMBOL(ieee80211_sta_eosp); |
37fbd908 | 1562 | |
042ec453 JB |
1563 | void ieee80211_sta_set_buffered(struct ieee80211_sta *pubsta, |
1564 | u8 tid, bool buffered) | |
dcf55fb5 FF |
1565 | { |
1566 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
1567 | ||
5a306f58 | 1568 | if (WARN_ON(tid >= IEEE80211_NUM_TIDS)) |
042ec453 JB |
1569 | return; |
1570 | ||
1b000789 JB |
1571 | trace_api_sta_set_buffered(sta->local, pubsta, tid, buffered); |
1572 | ||
948d887d JB |
1573 | if (buffered) |
1574 | set_bit(tid, &sta->driver_buffered_tids); | |
1575 | else | |
1576 | clear_bit(tid, &sta->driver_buffered_tids); | |
1577 | ||
c868cb35 | 1578 | sta_info_recalc_tim(sta); |
dcf55fb5 | 1579 | } |
042ec453 | 1580 | EXPORT_SYMBOL(ieee80211_sta_set_buffered); |
d9a7ddb0 | 1581 | |
83d5cc01 JB |
1582 | int sta_info_move_state(struct sta_info *sta, |
1583 | enum ieee80211_sta_state new_state) | |
d9a7ddb0 | 1584 | { |
8bf11d8d | 1585 | might_sleep(); |
d9a7ddb0 JB |
1586 | |
1587 | if (sta->sta_state == new_state) | |
1588 | return 0; | |
1589 | ||
f09603a2 JB |
1590 | /* check allowed transitions first */ |
1591 | ||
1592 | switch (new_state) { | |
1593 | case IEEE80211_STA_NONE: | |
1594 | if (sta->sta_state != IEEE80211_STA_AUTH) | |
1595 | return -EINVAL; | |
1596 | break; | |
1597 | case IEEE80211_STA_AUTH: | |
1598 | if (sta->sta_state != IEEE80211_STA_NONE && | |
1599 | sta->sta_state != IEEE80211_STA_ASSOC) | |
1600 | return -EINVAL; | |
1601 | break; | |
1602 | case IEEE80211_STA_ASSOC: | |
1603 | if (sta->sta_state != IEEE80211_STA_AUTH && | |
1604 | sta->sta_state != IEEE80211_STA_AUTHORIZED) | |
1605 | return -EINVAL; | |
1606 | break; | |
1607 | case IEEE80211_STA_AUTHORIZED: | |
1608 | if (sta->sta_state != IEEE80211_STA_ASSOC) | |
1609 | return -EINVAL; | |
1610 | break; | |
1611 | default: | |
1612 | WARN(1, "invalid state %d", new_state); | |
1613 | return -EINVAL; | |
1614 | } | |
1615 | ||
bdcbd8e0 JB |
1616 | sta_dbg(sta->sdata, "moving STA %pM to state %d\n", |
1617 | sta->sta.addr, new_state); | |
f09603a2 JB |
1618 | |
1619 | /* | |
1620 | * notify the driver before the actual changes so it can | |
1621 | * fail the transition | |
1622 | */ | |
1623 | if (test_sta_flag(sta, WLAN_STA_INSERTED)) { | |
1624 | int err = drv_sta_state(sta->local, sta->sdata, sta, | |
1625 | sta->sta_state, new_state); | |
1626 | if (err) | |
1627 | return err; | |
1628 | } | |
1629 | ||
1630 | /* reflect the change in all state variables */ | |
1631 | ||
d9a7ddb0 JB |
1632 | switch (new_state) { |
1633 | case IEEE80211_STA_NONE: | |
1634 | if (sta->sta_state == IEEE80211_STA_AUTH) | |
1635 | clear_bit(WLAN_STA_AUTH, &sta->_flags); | |
d9a7ddb0 JB |
1636 | break; |
1637 | case IEEE80211_STA_AUTH: | |
1638 | if (sta->sta_state == IEEE80211_STA_NONE) | |
1639 | set_bit(WLAN_STA_AUTH, &sta->_flags); | |
1640 | else if (sta->sta_state == IEEE80211_STA_ASSOC) | |
1641 | clear_bit(WLAN_STA_ASSOC, &sta->_flags); | |
d9a7ddb0 JB |
1642 | break; |
1643 | case IEEE80211_STA_ASSOC: | |
29623892 | 1644 | if (sta->sta_state == IEEE80211_STA_AUTH) { |
d9a7ddb0 | 1645 | set_bit(WLAN_STA_ASSOC, &sta->_flags); |
29623892 | 1646 | } else if (sta->sta_state == IEEE80211_STA_AUTHORIZED) { |
7e3ed02c FF |
1647 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP || |
1648 | (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
1649 | !sta->sdata->u.vlan.sta)) | |
1650 | atomic_dec(&sta->sdata->bss->num_mcast_sta); | |
d9a7ddb0 | 1651 | clear_bit(WLAN_STA_AUTHORIZED, &sta->_flags); |
f09603a2 | 1652 | } |
d9a7ddb0 JB |
1653 | break; |
1654 | case IEEE80211_STA_AUTHORIZED: | |
29623892 | 1655 | if (sta->sta_state == IEEE80211_STA_ASSOC) { |
7e3ed02c FF |
1656 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP || |
1657 | (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
1658 | !sta->sdata->u.vlan.sta)) | |
1659 | atomic_inc(&sta->sdata->bss->num_mcast_sta); | |
d9a7ddb0 | 1660 | set_bit(WLAN_STA_AUTHORIZED, &sta->_flags); |
f09603a2 | 1661 | } |
d9a7ddb0 JB |
1662 | break; |
1663 | default: | |
f09603a2 | 1664 | break; |
d9a7ddb0 JB |
1665 | } |
1666 | ||
d9a7ddb0 JB |
1667 | sta->sta_state = new_state; |
1668 | ||
1669 | return 0; | |
1670 | } | |
687da132 EG |
1671 | |
1672 | u8 sta_info_tx_streams(struct sta_info *sta) | |
1673 | { | |
1674 | struct ieee80211_sta_ht_cap *ht_cap = &sta->sta.ht_cap; | |
1675 | u8 rx_streams; | |
1676 | ||
1677 | if (!sta->sta.ht_cap.ht_supported) | |
1678 | return 1; | |
1679 | ||
1680 | if (sta->sta.vht_cap.vht_supported) { | |
1681 | int i; | |
1682 | u16 tx_mcs_map = | |
1683 | le16_to_cpu(sta->sta.vht_cap.vht_mcs.tx_mcs_map); | |
1684 | ||
1685 | for (i = 7; i >= 0; i--) | |
1686 | if ((tx_mcs_map & (0x3 << (i * 2))) != | |
1687 | IEEE80211_VHT_MCS_NOT_SUPPORTED) | |
1688 | return i + 1; | |
1689 | } | |
1690 | ||
1691 | if (ht_cap->mcs.rx_mask[3]) | |
1692 | rx_streams = 4; | |
1693 | else if (ht_cap->mcs.rx_mask[2]) | |
1694 | rx_streams = 3; | |
1695 | else if (ht_cap->mcs.rx_mask[1]) | |
1696 | rx_streams = 2; | |
1697 | else | |
1698 | rx_streams = 1; | |
1699 | ||
1700 | if (!(ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_RX_DIFF)) | |
1701 | return rx_streams; | |
1702 | ||
1703 | return ((ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK) | |
1704 | >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT) + 1; | |
1705 | } |