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Commit | Line | Data |
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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 EP |
101 | |
102 | /* | |
103 | * At this point, when being called as call_rcu callback, | |
104 | * neither mac80211 nor the driver can reference this | |
105 | * sta struct any more except by still existing timers | |
106 | * associated with this station that we clean up below. | |
051007d9 JB |
107 | * |
108 | * Note though that this still uses the sdata and even | |
109 | * calls the driver in AP and mesh mode, so interfaces | |
110 | * of those types mush use call sta_info_flush_cleanup() | |
111 | * (typically via sta_info_flush()) before deconfiguring | |
112 | * the driver. | |
113 | * | |
114 | * In station mode, nothing happens here so it doesn't | |
115 | * have to (and doesn't) do that, this is intentional to | |
116 | * speed up roaming. | |
b22cfcfc EP |
117 | */ |
118 | ||
119 | if (test_sta_flag(sta, WLAN_STA_PS_STA)) { | |
d012a605 MP |
120 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP || |
121 | sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
122 | ps = &sdata->bss->ps; | |
123 | else | |
124 | return; | |
b22cfcfc EP |
125 | |
126 | clear_sta_flag(sta, WLAN_STA_PS_STA); | |
127 | ||
d012a605 | 128 | atomic_dec(&ps->num_sta_ps); |
b22cfcfc EP |
129 | sta_info_recalc_tim(sta); |
130 | } | |
131 | ||
132 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { | |
133 | local->total_ps_buffered -= skb_queue_len(&sta->ps_tx_buf[ac]); | |
1f98ab7f FF |
134 | ieee80211_purge_tx_queue(&local->hw, &sta->ps_tx_buf[ac]); |
135 | ieee80211_purge_tx_queue(&local->hw, &sta->tx_filtered[ac]); | |
b22cfcfc EP |
136 | } |
137 | ||
138 | #ifdef CONFIG_MAC80211_MESH | |
139 | if (ieee80211_vif_is_mesh(&sdata->vif)) { | |
140 | mesh_accept_plinks_update(sdata); | |
141 | mesh_plink_deactivate(sta); | |
142 | del_timer_sync(&sta->plink_timer); | |
143 | } | |
144 | #endif | |
145 | ||
146 | cancel_work_sync(&sta->drv_unblock_wk); | |
147 | ||
148 | /* | |
149 | * Destroy aggregation state here. It would be nice to wait for the | |
150 | * driver to finish aggregation stop and then clean up, but for now | |
151 | * drivers have to handle aggregation stop being requested, followed | |
152 | * directly by station destruction. | |
153 | */ | |
5a306f58 | 154 | for (i = 0; i < IEEE80211_NUM_TIDS; i++) { |
b22cfcfc EP |
155 | tid_tx = rcu_dereference_raw(sta->ampdu_mlme.tid_tx[i]); |
156 | if (!tid_tx) | |
157 | continue; | |
1f98ab7f | 158 | ieee80211_purge_tx_queue(&local->hw, &tid_tx->pending); |
b22cfcfc EP |
159 | kfree(tid_tx); |
160 | } | |
161 | ||
162 | sta_info_free(local, sta); | |
163 | } | |
164 | ||
97f97b1f JB |
165 | void ieee80211_cleanup_sdata_stas(struct ieee80211_sub_if_data *sdata) |
166 | { | |
167 | struct sta_info *sta; | |
168 | ||
169 | spin_lock_bh(&sdata->cleanup_stations_lock); | |
170 | while (!list_empty(&sdata->cleanup_stations)) { | |
171 | sta = list_first_entry(&sdata->cleanup_stations, | |
172 | struct sta_info, list); | |
173 | list_del(&sta->list); | |
174 | spin_unlock_bh(&sdata->cleanup_stations_lock); | |
175 | ||
176 | cleanup_single_sta(sta); | |
177 | ||
178 | spin_lock_bh(&sdata->cleanup_stations_lock); | |
179 | } | |
180 | ||
181 | spin_unlock_bh(&sdata->cleanup_stations_lock); | |
182 | } | |
183 | ||
b22cfcfc EP |
184 | static void free_sta_rcu(struct rcu_head *h) |
185 | { | |
186 | struct sta_info *sta = container_of(h, struct sta_info, rcu_head); | |
97f97b1f | 187 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
b22cfcfc | 188 | |
97f97b1f JB |
189 | spin_lock(&sdata->cleanup_stations_lock); |
190 | list_add_tail(&sta->list, &sdata->cleanup_stations); | |
191 | spin_unlock(&sdata->cleanup_stations_lock); | |
192 | ||
193 | ieee80211_queue_work(&sdata->local->hw, &sdata->cleanup_stations_wk); | |
b22cfcfc EP |
194 | } |
195 | ||
d0709a65 | 196 | /* protected by RCU */ |
abe60632 JB |
197 | struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata, |
198 | const u8 *addr) | |
f0706e82 | 199 | { |
abe60632 | 200 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
201 | struct sta_info *sta; |
202 | ||
0379185b | 203 | sta = rcu_dereference_check(local->sta_hash[STA_HASH(addr)], |
0379185b | 204 | lockdep_is_held(&local->sta_mtx)); |
f0706e82 | 205 | while (sta) { |
abe60632 | 206 | if (sta->sdata == sdata && |
b203ca39 | 207 | ether_addr_equal(sta->sta.addr, addr)) |
f0706e82 | 208 | break; |
0379185b | 209 | sta = rcu_dereference_check(sta->hnext, |
0379185b | 210 | lockdep_is_held(&local->sta_mtx)); |
f0706e82 | 211 | } |
43ba7e95 JB |
212 | return sta; |
213 | } | |
214 | ||
0e5ded5a FF |
215 | /* |
216 | * Get sta info either from the specified interface | |
217 | * or from one of its vlans | |
218 | */ | |
219 | struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata, | |
220 | const u8 *addr) | |
221 | { | |
222 | struct ieee80211_local *local = sdata->local; | |
223 | struct sta_info *sta; | |
224 | ||
0379185b | 225 | sta = rcu_dereference_check(local->sta_hash[STA_HASH(addr)], |
0379185b | 226 | lockdep_is_held(&local->sta_mtx)); |
0e5ded5a FF |
227 | while (sta) { |
228 | if ((sta->sdata == sdata || | |
a2c1e3da | 229 | (sta->sdata->bss && sta->sdata->bss == sdata->bss)) && |
b203ca39 | 230 | ether_addr_equal(sta->sta.addr, addr)) |
0e5ded5a | 231 | break; |
0379185b | 232 | sta = rcu_dereference_check(sta->hnext, |
0379185b | 233 | lockdep_is_held(&local->sta_mtx)); |
0e5ded5a FF |
234 | } |
235 | return sta; | |
236 | } | |
237 | ||
3b53fde8 JB |
238 | struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata, |
239 | int idx) | |
ee385855 | 240 | { |
3b53fde8 | 241 | struct ieee80211_local *local = sdata->local; |
ee385855 LCC |
242 | struct sta_info *sta; |
243 | int i = 0; | |
244 | ||
d0709a65 | 245 | list_for_each_entry_rcu(sta, &local->sta_list, list) { |
3b53fde8 | 246 | if (sdata != sta->sdata) |
2a8ca29a | 247 | continue; |
ee385855 LCC |
248 | if (i < idx) { |
249 | ++i; | |
250 | continue; | |
ee385855 | 251 | } |
2a8ca29a | 252 | return sta; |
ee385855 | 253 | } |
ee385855 LCC |
254 | |
255 | return NULL; | |
256 | } | |
f0706e82 | 257 | |
93e5deb1 | 258 | /** |
d9a7ddb0 | 259 | * sta_info_free - free STA |
93e5deb1 | 260 | * |
6ef307bc | 261 | * @local: pointer to the global information |
93e5deb1 JB |
262 | * @sta: STA info to free |
263 | * | |
264 | * This function must undo everything done by sta_info_alloc() | |
d9a7ddb0 JB |
265 | * that may happen before sta_info_insert(). It may only be |
266 | * called when sta_info_insert() has not been attempted (and | |
267 | * if that fails, the station is freed anyway.) | |
93e5deb1 | 268 | */ |
d9a7ddb0 | 269 | void sta_info_free(struct ieee80211_local *local, struct sta_info *sta) |
93e5deb1 | 270 | { |
889cbb91 | 271 | if (sta->rate_ctrl) |
af65cd96 | 272 | rate_control_free_sta(sta); |
93e5deb1 | 273 | |
bdcbd8e0 | 274 | sta_dbg(sta->sdata, "Destroyed STA %pM\n", sta->sta.addr); |
93e5deb1 JB |
275 | |
276 | kfree(sta); | |
277 | } | |
278 | ||
4d33960b | 279 | /* Caller must hold local->sta_mtx */ |
d0709a65 JB |
280 | static void sta_info_hash_add(struct ieee80211_local *local, |
281 | struct sta_info *sta) | |
f0706e82 | 282 | { |
4d33960b | 283 | lockdep_assert_held(&local->sta_mtx); |
17741cdc | 284 | sta->hnext = local->sta_hash[STA_HASH(sta->sta.addr)]; |
cf778b00 | 285 | rcu_assign_pointer(local->sta_hash[STA_HASH(sta->sta.addr)], sta); |
f0706e82 | 286 | } |
f0706e82 | 287 | |
af818581 JB |
288 | static void sta_unblock(struct work_struct *wk) |
289 | { | |
290 | struct sta_info *sta; | |
291 | ||
292 | sta = container_of(wk, struct sta_info, drv_unblock_wk); | |
293 | ||
294 | if (sta->dead) | |
295 | return; | |
296 | ||
54420473 HS |
297 | if (!test_sta_flag(sta, WLAN_STA_PS_STA)) { |
298 | local_bh_disable(); | |
af818581 | 299 | ieee80211_sta_ps_deliver_wakeup(sta); |
54420473 HS |
300 | local_bh_enable(); |
301 | } else if (test_and_clear_sta_flag(sta, WLAN_STA_PSPOLL)) { | |
c2c98fde | 302 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); |
ce662b44 JB |
303 | |
304 | local_bh_disable(); | |
af818581 | 305 | ieee80211_sta_ps_deliver_poll_response(sta); |
ce662b44 | 306 | local_bh_enable(); |
c2c98fde JB |
307 | } else if (test_and_clear_sta_flag(sta, WLAN_STA_UAPSD)) { |
308 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); | |
ce662b44 JB |
309 | |
310 | local_bh_disable(); | |
47086fc5 | 311 | ieee80211_sta_ps_deliver_uapsd(sta); |
ce662b44 | 312 | local_bh_enable(); |
50a9432d | 313 | } else |
c2c98fde | 314 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); |
af818581 JB |
315 | } |
316 | ||
af65cd96 JB |
317 | static int sta_prepare_rate_control(struct ieee80211_local *local, |
318 | struct sta_info *sta, gfp_t gfp) | |
319 | { | |
320 | if (local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL) | |
321 | return 0; | |
322 | ||
889cbb91 | 323 | sta->rate_ctrl = local->rate_ctrl; |
af65cd96 JB |
324 | sta->rate_ctrl_priv = rate_control_alloc_sta(sta->rate_ctrl, |
325 | &sta->sta, gfp); | |
889cbb91 | 326 | if (!sta->rate_ctrl_priv) |
af65cd96 | 327 | return -ENOMEM; |
af65cd96 JB |
328 | |
329 | return 0; | |
330 | } | |
331 | ||
73651ee6 | 332 | struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata, |
56544160 | 333 | const u8 *addr, gfp_t gfp) |
f0706e82 | 334 | { |
d0709a65 | 335 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 336 | struct sta_info *sta; |
ebe27c91 | 337 | struct timespec uptime; |
16c5f15c | 338 | int i; |
f0706e82 | 339 | |
17741cdc | 340 | sta = kzalloc(sizeof(*sta) + local->hw.sta_data_size, gfp); |
f0706e82 | 341 | if (!sta) |
73651ee6 | 342 | return NULL; |
f0706e82 | 343 | |
07346f81 | 344 | spin_lock_init(&sta->lock); |
af818581 | 345 | INIT_WORK(&sta->drv_unblock_wk, sta_unblock); |
67c282c0 | 346 | INIT_WORK(&sta->ampdu_mlme.work, ieee80211_ba_session_work); |
a93e3644 | 347 | mutex_init(&sta->ampdu_mlme.mtx); |
07346f81 | 348 | |
17741cdc | 349 | memcpy(sta->sta.addr, addr, ETH_ALEN); |
d0709a65 JB |
350 | sta->local = local; |
351 | sta->sdata = sdata; | |
8bc8aecd | 352 | sta->last_rx = jiffies; |
f0706e82 | 353 | |
71ec375c JB |
354 | sta->sta_state = IEEE80211_STA_NONE; |
355 | ||
ebe27c91 MSS |
356 | do_posix_clock_monotonic_gettime(&uptime); |
357 | sta->last_connected = uptime.tv_sec; | |
541a45a1 BR |
358 | ewma_init(&sta->avg_signal, 1024, 8); |
359 | ||
af65cd96 | 360 | if (sta_prepare_rate_control(local, sta, gfp)) { |
f0706e82 | 361 | kfree(sta); |
73651ee6 | 362 | return NULL; |
f0706e82 JB |
363 | } |
364 | ||
5a306f58 | 365 | for (i = 0; i < IEEE80211_NUM_TIDS; i++) { |
a622ab72 JB |
366 | /* |
367 | * timer_to_tid must be initialized with identity mapping | |
368 | * to enable session_timer's data differentiation. See | |
369 | * sta_rx_agg_session_timer_expired for usage. | |
370 | */ | |
16c5f15c | 371 | sta->timer_to_tid[i] = i; |
16c5f15c | 372 | } |
948d887d JB |
373 | for (i = 0; i < IEEE80211_NUM_ACS; i++) { |
374 | skb_queue_head_init(&sta->ps_tx_buf[i]); | |
375 | skb_queue_head_init(&sta->tx_filtered[i]); | |
376 | } | |
73651ee6 | 377 | |
5a306f58 | 378 | for (i = 0; i < IEEE80211_NUM_TIDS; i++) |
4be929be | 379 | sta->last_seq_ctrl[i] = cpu_to_le16(USHRT_MAX); |
cccaec98 | 380 | |
bdcbd8e0 | 381 | sta_dbg(sdata, "Allocated STA %pM\n", sta->sta.addr); |
73651ee6 JB |
382 | |
383 | return sta; | |
384 | } | |
385 | ||
8c71df7a | 386 | static int sta_info_insert_check(struct sta_info *sta) |
34e89507 | 387 | { |
34e89507 | 388 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
34e89507 | 389 | |
03e4497e JB |
390 | /* |
391 | * Can't be a WARN_ON because it can be triggered through a race: | |
392 | * something inserts a STA (on one CPU) without holding the RTNL | |
393 | * and another CPU turns off the net device. | |
394 | */ | |
8c71df7a GE |
395 | if (unlikely(!ieee80211_sdata_running(sdata))) |
396 | return -ENETDOWN; | |
03e4497e | 397 | |
b203ca39 | 398 | if (WARN_ON(ether_addr_equal(sta->sta.addr, sdata->vif.addr) || |
8c71df7a GE |
399 | is_multicast_ether_addr(sta->sta.addr))) |
400 | return -EINVAL; | |
401 | ||
402 | return 0; | |
403 | } | |
404 | ||
f09603a2 JB |
405 | static int sta_info_insert_drv_state(struct ieee80211_local *local, |
406 | struct ieee80211_sub_if_data *sdata, | |
407 | struct sta_info *sta) | |
408 | { | |
409 | enum ieee80211_sta_state state; | |
410 | int err = 0; | |
411 | ||
412 | for (state = IEEE80211_STA_NOTEXIST; state < sta->sta_state; state++) { | |
413 | err = drv_sta_state(local, sdata, sta, state, state + 1); | |
414 | if (err) | |
415 | break; | |
416 | } | |
417 | ||
418 | if (!err) { | |
a4ec45a4 JB |
419 | /* |
420 | * Drivers using legacy sta_add/sta_remove callbacks only | |
421 | * get uploaded set to true after sta_add is called. | |
422 | */ | |
423 | if (!local->ops->sta_add) | |
424 | sta->uploaded = true; | |
f09603a2 JB |
425 | return 0; |
426 | } | |
427 | ||
428 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { | |
bdcbd8e0 JB |
429 | sdata_info(sdata, |
430 | "failed to move IBSS STA %pM to state %d (%d) - keeping it anyway\n", | |
431 | sta->sta.addr, state + 1, err); | |
f09603a2 JB |
432 | err = 0; |
433 | } | |
434 | ||
435 | /* unwind on error */ | |
436 | for (; state > IEEE80211_STA_NOTEXIST; state--) | |
437 | WARN_ON(drv_sta_state(local, sdata, sta, state, state - 1)); | |
438 | ||
439 | return err; | |
440 | } | |
441 | ||
8c71df7a GE |
442 | /* |
443 | * should be called with sta_mtx locked | |
444 | * this function replaces the mutex lock | |
445 | * with a RCU lock | |
446 | */ | |
4d33960b | 447 | static int sta_info_insert_finish(struct sta_info *sta) __acquires(RCU) |
8c71df7a GE |
448 | { |
449 | struct ieee80211_local *local = sta->local; | |
450 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
7852e361 | 451 | struct station_info sinfo; |
8c71df7a GE |
452 | int err = 0; |
453 | ||
454 | lockdep_assert_held(&local->sta_mtx); | |
34e89507 | 455 | |
7852e361 JB |
456 | /* check if STA exists already */ |
457 | if (sta_info_get_bss(sdata, sta->sta.addr)) { | |
458 | err = -EEXIST; | |
459 | goto out_err; | |
4d33960b | 460 | } |
32bfd35d | 461 | |
7852e361 JB |
462 | /* notify driver */ |
463 | err = sta_info_insert_drv_state(local, sdata, sta); | |
464 | if (err) | |
465 | goto out_err; | |
4d33960b | 466 | |
7852e361 JB |
467 | local->num_sta++; |
468 | local->sta_generation++; | |
469 | smp_mb(); | |
4d33960b | 470 | |
7852e361 JB |
471 | /* make the station visible */ |
472 | sta_info_hash_add(local, sta); | |
83d5cc01 | 473 | |
794454ce | 474 | list_add_rcu(&sta->list, &local->sta_list); |
4d33960b | 475 | |
7852e361 | 476 | set_sta_flag(sta, WLAN_STA_INSERTED); |
4d33960b | 477 | |
7852e361 JB |
478 | ieee80211_sta_debugfs_add(sta); |
479 | rate_control_add_sta_debugfs(sta); | |
4d33960b | 480 | |
7852e361 JB |
481 | memset(&sinfo, 0, sizeof(sinfo)); |
482 | sinfo.filled = 0; | |
483 | sinfo.generation = local->sta_generation; | |
484 | cfg80211_new_sta(sdata->dev, sta->sta.addr, &sinfo, GFP_KERNEL); | |
d0709a65 | 485 | |
bdcbd8e0 | 486 | sta_dbg(sdata, "Inserted STA %pM\n", sta->sta.addr); |
f0706e82 | 487 | |
34e89507 JB |
488 | /* move reference to rcu-protected */ |
489 | rcu_read_lock(); | |
490 | mutex_unlock(&local->sta_mtx); | |
e9f207f0 | 491 | |
73651ee6 JB |
492 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
493 | mesh_accept_plinks_update(sdata); | |
494 | ||
8c71df7a | 495 | return 0; |
4d33960b JB |
496 | out_err: |
497 | mutex_unlock(&local->sta_mtx); | |
498 | rcu_read_lock(); | |
499 | return err; | |
8c71df7a GE |
500 | } |
501 | ||
502 | int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU) | |
503 | { | |
504 | struct ieee80211_local *local = sta->local; | |
8c71df7a GE |
505 | int err = 0; |
506 | ||
4d33960b JB |
507 | might_sleep(); |
508 | ||
8c71df7a GE |
509 | err = sta_info_insert_check(sta); |
510 | if (err) { | |
511 | rcu_read_lock(); | |
512 | goto out_free; | |
513 | } | |
514 | ||
8c71df7a GE |
515 | mutex_lock(&local->sta_mtx); |
516 | ||
4d33960b | 517 | err = sta_info_insert_finish(sta); |
8c71df7a GE |
518 | if (err) |
519 | goto out_free; | |
520 | ||
73651ee6 | 521 | return 0; |
93e5deb1 JB |
522 | out_free: |
523 | BUG_ON(!err); | |
d9a7ddb0 | 524 | sta_info_free(local, sta); |
93e5deb1 | 525 | return err; |
f0706e82 JB |
526 | } |
527 | ||
34e89507 JB |
528 | int sta_info_insert(struct sta_info *sta) |
529 | { | |
530 | int err = sta_info_insert_rcu(sta); | |
531 | ||
532 | rcu_read_unlock(); | |
533 | ||
534 | return err; | |
535 | } | |
536 | ||
d012a605 | 537 | static inline void __bss_tim_set(u8 *tim, u16 id) |
004c872e JB |
538 | { |
539 | /* | |
540 | * This format has been mandated by the IEEE specifications, | |
541 | * so this line may not be changed to use the __set_bit() format. | |
542 | */ | |
d012a605 | 543 | tim[id / 8] |= (1 << (id % 8)); |
004c872e JB |
544 | } |
545 | ||
d012a605 | 546 | static inline void __bss_tim_clear(u8 *tim, u16 id) |
004c872e JB |
547 | { |
548 | /* | |
549 | * This format has been mandated by the IEEE specifications, | |
550 | * so this line may not be changed to use the __clear_bit() format. | |
551 | */ | |
d012a605 | 552 | tim[id / 8] &= ~(1 << (id % 8)); |
004c872e JB |
553 | } |
554 | ||
948d887d | 555 | static unsigned long ieee80211_tids_for_ac(int ac) |
004c872e | 556 | { |
948d887d JB |
557 | /* If we ever support TIDs > 7, this obviously needs to be adjusted */ |
558 | switch (ac) { | |
559 | case IEEE80211_AC_VO: | |
560 | return BIT(6) | BIT(7); | |
561 | case IEEE80211_AC_VI: | |
562 | return BIT(4) | BIT(5); | |
563 | case IEEE80211_AC_BE: | |
564 | return BIT(0) | BIT(3); | |
565 | case IEEE80211_AC_BK: | |
566 | return BIT(1) | BIT(2); | |
567 | default: | |
568 | WARN_ON(1); | |
569 | return 0; | |
d0709a65 | 570 | } |
004c872e JB |
571 | } |
572 | ||
c868cb35 | 573 | void sta_info_recalc_tim(struct sta_info *sta) |
004c872e | 574 | { |
c868cb35 | 575 | struct ieee80211_local *local = sta->local; |
d012a605 | 576 | struct ps_data *ps; |
d0709a65 | 577 | unsigned long flags; |
948d887d JB |
578 | bool indicate_tim = false; |
579 | u8 ignore_for_tim = sta->sta.uapsd_queues; | |
580 | int ac; | |
d012a605 MP |
581 | u16 id; |
582 | ||
583 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP || | |
584 | sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { | |
585 | if (WARN_ON_ONCE(!sta->sdata->bss)) | |
586 | return; | |
004c872e | 587 | |
d012a605 MP |
588 | ps = &sta->sdata->bss->ps; |
589 | id = sta->sta.aid; | |
590 | } else { | |
c868cb35 | 591 | return; |
d012a605 | 592 | } |
3e122be0 | 593 | |
c868cb35 JB |
594 | /* No need to do anything if the driver does all */ |
595 | if (local->hw.flags & IEEE80211_HW_AP_LINK_PS) | |
596 | return; | |
004c872e | 597 | |
c868cb35 JB |
598 | if (sta->dead) |
599 | goto done; | |
3e122be0 | 600 | |
948d887d JB |
601 | /* |
602 | * If all ACs are delivery-enabled then we should build | |
603 | * the TIM bit for all ACs anyway; if only some are then | |
604 | * we ignore those and build the TIM bit using only the | |
605 | * non-enabled ones. | |
606 | */ | |
607 | if (ignore_for_tim == BIT(IEEE80211_NUM_ACS) - 1) | |
608 | ignore_for_tim = 0; | |
609 | ||
610 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { | |
611 | unsigned long tids; | |
3e122be0 | 612 | |
948d887d JB |
613 | if (ignore_for_tim & BIT(ac)) |
614 | continue; | |
615 | ||
616 | indicate_tim |= !skb_queue_empty(&sta->tx_filtered[ac]) || | |
617 | !skb_queue_empty(&sta->ps_tx_buf[ac]); | |
618 | if (indicate_tim) | |
619 | break; | |
3e122be0 | 620 | |
948d887d JB |
621 | tids = ieee80211_tids_for_ac(ac); |
622 | ||
623 | indicate_tim |= | |
624 | sta->driver_buffered_tids & tids; | |
d0709a65 | 625 | } |
004c872e | 626 | |
c868cb35 | 627 | done: |
4d33960b | 628 | spin_lock_irqsave(&local->tim_lock, flags); |
004c872e | 629 | |
948d887d | 630 | if (indicate_tim) |
d012a605 | 631 | __bss_tim_set(ps->tim, id); |
c868cb35 | 632 | else |
d012a605 | 633 | __bss_tim_clear(ps->tim, id); |
004c872e | 634 | |
c868cb35 JB |
635 | if (local->ops->set_tim) { |
636 | local->tim_in_locked_section = true; | |
948d887d | 637 | drv_set_tim(local, &sta->sta, indicate_tim); |
c868cb35 JB |
638 | local->tim_in_locked_section = false; |
639 | } | |
3e122be0 | 640 | |
4d33960b | 641 | spin_unlock_irqrestore(&local->tim_lock, flags); |
004c872e JB |
642 | } |
643 | ||
cd0b8d89 | 644 | static bool sta_info_buffer_expired(struct sta_info *sta, struct sk_buff *skb) |
f0706e82 | 645 | { |
e039fa4a | 646 | struct ieee80211_tx_info *info; |
f0706e82 JB |
647 | int timeout; |
648 | ||
649 | if (!skb) | |
cd0b8d89 | 650 | return false; |
f0706e82 | 651 | |
e039fa4a | 652 | info = IEEE80211_SKB_CB(skb); |
f0706e82 JB |
653 | |
654 | /* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */ | |
57c4d7b4 JB |
655 | timeout = (sta->listen_interval * |
656 | sta->sdata->vif.bss_conf.beacon_int * | |
657 | 32 / 15625) * HZ; | |
f0706e82 JB |
658 | if (timeout < STA_TX_BUFFER_EXPIRE) |
659 | timeout = STA_TX_BUFFER_EXPIRE; | |
e039fa4a | 660 | return time_after(jiffies, info->control.jiffies + timeout); |
f0706e82 JB |
661 | } |
662 | ||
663 | ||
948d887d JB |
664 | static bool sta_info_cleanup_expire_buffered_ac(struct ieee80211_local *local, |
665 | struct sta_info *sta, int ac) | |
f0706e82 JB |
666 | { |
667 | unsigned long flags; | |
668 | struct sk_buff *skb; | |
669 | ||
60750397 JB |
670 | /* |
671 | * First check for frames that should expire on the filtered | |
672 | * queue. Frames here were rejected by the driver and are on | |
673 | * a separate queue to avoid reordering with normal PS-buffered | |
674 | * frames. They also aren't accounted for right now in the | |
675 | * total_ps_buffered counter. | |
676 | */ | |
677 | for (;;) { | |
948d887d JB |
678 | spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags); |
679 | skb = skb_peek(&sta->tx_filtered[ac]); | |
60750397 | 680 | if (sta_info_buffer_expired(sta, skb)) |
948d887d | 681 | skb = __skb_dequeue(&sta->tx_filtered[ac]); |
60750397 JB |
682 | else |
683 | skb = NULL; | |
948d887d | 684 | spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags); |
60750397 JB |
685 | |
686 | /* | |
687 | * Frames are queued in order, so if this one | |
688 | * hasn't expired yet we can stop testing. If | |
689 | * we actually reached the end of the queue we | |
690 | * also need to stop, of course. | |
691 | */ | |
692 | if (!skb) | |
693 | break; | |
d4fa14cd | 694 | ieee80211_free_txskb(&local->hw, skb); |
60750397 JB |
695 | } |
696 | ||
697 | /* | |
698 | * Now also check the normal PS-buffered queue, this will | |
699 | * only find something if the filtered queue was emptied | |
700 | * since the filtered frames are all before the normal PS | |
701 | * buffered frames. | |
702 | */ | |
f0706e82 | 703 | for (;;) { |
948d887d JB |
704 | spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags); |
705 | skb = skb_peek(&sta->ps_tx_buf[ac]); | |
57c4d7b4 | 706 | if (sta_info_buffer_expired(sta, skb)) |
948d887d | 707 | skb = __skb_dequeue(&sta->ps_tx_buf[ac]); |
836341a7 | 708 | else |
f0706e82 | 709 | skb = NULL; |
948d887d | 710 | spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags); |
f0706e82 | 711 | |
60750397 JB |
712 | /* |
713 | * frames are queued in order, so if this one | |
714 | * hasn't expired yet (or we reached the end of | |
715 | * the queue) we can stop testing | |
716 | */ | |
836341a7 | 717 | if (!skb) |
f0706e82 | 718 | break; |
836341a7 | 719 | |
836341a7 | 720 | local->total_ps_buffered--; |
bdcbd8e0 JB |
721 | ps_dbg(sta->sdata, "Buffered frame expired (STA %pM)\n", |
722 | sta->sta.addr); | |
d4fa14cd | 723 | ieee80211_free_txskb(&local->hw, skb); |
f0706e82 | 724 | } |
3393a608 | 725 | |
60750397 JB |
726 | /* |
727 | * Finally, recalculate the TIM bit for this station -- it might | |
728 | * now be clear because the station was too slow to retrieve its | |
729 | * frames. | |
730 | */ | |
731 | sta_info_recalc_tim(sta); | |
732 | ||
733 | /* | |
734 | * Return whether there are any frames still buffered, this is | |
735 | * used to check whether the cleanup timer still needs to run, | |
736 | * if there are no frames we don't need to rearm the timer. | |
737 | */ | |
948d887d JB |
738 | return !(skb_queue_empty(&sta->ps_tx_buf[ac]) && |
739 | skb_queue_empty(&sta->tx_filtered[ac])); | |
740 | } | |
741 | ||
742 | static bool sta_info_cleanup_expire_buffered(struct ieee80211_local *local, | |
743 | struct sta_info *sta) | |
744 | { | |
745 | bool have_buffered = false; | |
746 | int ac; | |
747 | ||
748 | /* This is only necessary for stations on BSS interfaces */ | |
749 | if (!sta->sdata->bss) | |
750 | return false; | |
751 | ||
752 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) | |
753 | have_buffered |= | |
754 | sta_info_cleanup_expire_buffered_ac(local, sta, ac); | |
755 | ||
756 | return have_buffered; | |
f0706e82 JB |
757 | } |
758 | ||
83d5cc01 | 759 | int __must_check __sta_info_destroy(struct sta_info *sta) |
f0706e82 | 760 | { |
34e89507 JB |
761 | struct ieee80211_local *local; |
762 | struct ieee80211_sub_if_data *sdata; | |
b22cfcfc | 763 | int ret, i; |
f0706e82 | 764 | |
34e89507 | 765 | might_sleep(); |
f0706e82 | 766 | |
34e89507 JB |
767 | if (!sta) |
768 | return -ENOENT; | |
5bb644a0 | 769 | |
34e89507 JB |
770 | local = sta->local; |
771 | sdata = sta->sdata; | |
f0706e82 | 772 | |
83d5cc01 JB |
773 | lockdep_assert_held(&local->sta_mtx); |
774 | ||
098a6070 JB |
775 | /* |
776 | * Before removing the station from the driver and | |
777 | * rate control, it might still start new aggregation | |
778 | * sessions -- block that to make sure the tear-down | |
779 | * will be sufficient. | |
780 | */ | |
c2c98fde | 781 | set_sta_flag(sta, WLAN_STA_BLOCK_BA); |
c82c4a80 | 782 | ieee80211_sta_tear_down_BA_sessions(sta, AGG_STOP_DESTROY_STA); |
098a6070 | 783 | |
34e89507 | 784 | ret = sta_info_hash_del(local, sta); |
34e89507 JB |
785 | if (ret) |
786 | return ret; | |
787 | ||
794454ce | 788 | list_del_rcu(&sta->list); |
4d33960b | 789 | |
8cb23153 | 790 | mutex_lock(&local->key_mtx); |
e31b8213 | 791 | for (i = 0; i < NUM_DEFAULT_KEYS; i++) |
40b275b6 | 792 | __ieee80211_key_free(key_mtx_dereference(local, sta->gtk[i])); |
e31b8213 | 793 | if (sta->ptk) |
40b275b6 | 794 | __ieee80211_key_free(key_mtx_dereference(local, sta->ptk)); |
8cb23153 | 795 | mutex_unlock(&local->key_mtx); |
34e89507 JB |
796 | |
797 | sta->dead = true; | |
798 | ||
34e89507 JB |
799 | local->num_sta--; |
800 | local->sta_generation++; | |
801 | ||
802 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
a9b3cd7f | 803 | RCU_INIT_POINTER(sdata->u.vlan.sta, NULL); |
34e89507 | 804 | |
83d5cc01 | 805 | while (sta->sta_state > IEEE80211_STA_NONE) { |
f09603a2 JB |
806 | ret = sta_info_move_state(sta, sta->sta_state - 1); |
807 | if (ret) { | |
83d5cc01 JB |
808 | WARN_ON_ONCE(1); |
809 | break; | |
810 | } | |
811 | } | |
d9a7ddb0 | 812 | |
f09603a2 | 813 | if (sta->uploaded) { |
f09603a2 JB |
814 | ret = drv_sta_state(local, sdata, sta, IEEE80211_STA_NONE, |
815 | IEEE80211_STA_NOTEXIST); | |
816 | WARN_ON_ONCE(ret != 0); | |
817 | } | |
34e89507 | 818 | |
bdcbd8e0 JB |
819 | sta_dbg(sdata, "Removed STA %pM\n", sta->sta.addr); |
820 | ||
ec15e68b JM |
821 | cfg80211_del_sta(sdata->dev, sta->sta.addr, GFP_KERNEL); |
822 | ||
34e89507 JB |
823 | rate_control_remove_sta_debugfs(sta); |
824 | ieee80211_sta_debugfs_remove(sta); | |
825 | ||
b22cfcfc | 826 | call_rcu(&sta->rcu_head, free_sta_rcu); |
34e89507 JB |
827 | |
828 | return 0; | |
4d6141c3 JS |
829 | } |
830 | ||
34e89507 | 831 | int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, const u8 *addr) |
4d6141c3 | 832 | { |
34e89507 JB |
833 | struct sta_info *sta; |
834 | int ret; | |
4d6141c3 | 835 | |
34e89507 | 836 | mutex_lock(&sdata->local->sta_mtx); |
7852e361 | 837 | sta = sta_info_get(sdata, addr); |
34e89507 JB |
838 | ret = __sta_info_destroy(sta); |
839 | mutex_unlock(&sdata->local->sta_mtx); | |
4d6141c3 JS |
840 | |
841 | return ret; | |
842 | } | |
843 | ||
34e89507 JB |
844 | int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata, |
845 | const u8 *addr) | |
e9f207f0 | 846 | { |
34e89507 JB |
847 | struct sta_info *sta; |
848 | int ret; | |
e9f207f0 | 849 | |
34e89507 | 850 | mutex_lock(&sdata->local->sta_mtx); |
7852e361 | 851 | sta = sta_info_get_bss(sdata, addr); |
34e89507 JB |
852 | ret = __sta_info_destroy(sta); |
853 | mutex_unlock(&sdata->local->sta_mtx); | |
d0709a65 | 854 | |
34e89507 JB |
855 | return ret; |
856 | } | |
e9f207f0 | 857 | |
34e89507 JB |
858 | static void sta_info_cleanup(unsigned long data) |
859 | { | |
860 | struct ieee80211_local *local = (struct ieee80211_local *) data; | |
861 | struct sta_info *sta; | |
3393a608 | 862 | bool timer_needed = false; |
34e89507 JB |
863 | |
864 | rcu_read_lock(); | |
865 | list_for_each_entry_rcu(sta, &local->sta_list, list) | |
3393a608 JO |
866 | if (sta_info_cleanup_expire_buffered(local, sta)) |
867 | timer_needed = true; | |
34e89507 | 868 | rcu_read_unlock(); |
e9f207f0 | 869 | |
34e89507 JB |
870 | if (local->quiescing) |
871 | return; | |
d0709a65 | 872 | |
3393a608 JO |
873 | if (!timer_needed) |
874 | return; | |
875 | ||
26d59535 JB |
876 | mod_timer(&local->sta_cleanup, |
877 | round_jiffies(jiffies + STA_INFO_CLEANUP_INTERVAL)); | |
e9f207f0 | 878 | } |
e9f207f0 | 879 | |
f0706e82 JB |
880 | void sta_info_init(struct ieee80211_local *local) |
881 | { | |
4d33960b | 882 | spin_lock_init(&local->tim_lock); |
34e89507 | 883 | mutex_init(&local->sta_mtx); |
f0706e82 | 884 | INIT_LIST_HEAD(&local->sta_list); |
f0706e82 | 885 | |
b24b8a24 PE |
886 | setup_timer(&local->sta_cleanup, sta_info_cleanup, |
887 | (unsigned long)local); | |
f0706e82 JB |
888 | } |
889 | ||
890 | void sta_info_stop(struct ieee80211_local *local) | |
891 | { | |
a56f992c | 892 | del_timer_sync(&local->sta_cleanup); |
f0706e82 JB |
893 | } |
894 | ||
051007d9 JB |
895 | |
896 | int sta_info_flush_defer(struct ieee80211_sub_if_data *sdata) | |
f0706e82 | 897 | { |
b998e8bb | 898 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 899 | struct sta_info *sta, *tmp; |
44213b5e | 900 | int ret = 0; |
f0706e82 | 901 | |
d0709a65 | 902 | might_sleep(); |
be8755e1 | 903 | |
34e89507 | 904 | mutex_lock(&local->sta_mtx); |
d0709a65 | 905 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { |
b998e8bb | 906 | if (sdata == sta->sdata) { |
34e89507 | 907 | WARN_ON(__sta_info_destroy(sta)); |
34316837 JB |
908 | ret++; |
909 | } | |
be8755e1 | 910 | } |
34e89507 | 911 | mutex_unlock(&local->sta_mtx); |
44213b5e | 912 | |
051007d9 JB |
913 | return ret; |
914 | } | |
915 | ||
916 | void sta_info_flush_cleanup(struct ieee80211_sub_if_data *sdata) | |
917 | { | |
b998e8bb JB |
918 | ieee80211_cleanup_sdata_stas(sdata); |
919 | cancel_work_sync(&sdata->cleanup_stations_wk); | |
f0706e82 | 920 | } |
dc6676b7 | 921 | |
24723d1b JB |
922 | void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, |
923 | unsigned long exp_time) | |
924 | { | |
925 | struct ieee80211_local *local = sdata->local; | |
926 | struct sta_info *sta, *tmp; | |
24723d1b | 927 | |
34e89507 | 928 | mutex_lock(&local->sta_mtx); |
e46a2cf9 MSS |
929 | |
930 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { | |
ec2b774e ML |
931 | if (sdata != sta->sdata) |
932 | continue; | |
933 | ||
24723d1b | 934 | if (time_after(jiffies, sta->last_rx + exp_time)) { |
eea57d42 MSS |
935 | sta_dbg(sta->sdata, "expiring inactive STA %pM\n", |
936 | sta->sta.addr); | |
34e89507 | 937 | WARN_ON(__sta_info_destroy(sta)); |
24723d1b | 938 | } |
e46a2cf9 MSS |
939 | } |
940 | ||
34e89507 | 941 | mutex_unlock(&local->sta_mtx); |
24723d1b | 942 | } |
17741cdc | 943 | |
686b9cb9 BG |
944 | struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw, |
945 | const u8 *addr, | |
946 | const u8 *localaddr) | |
17741cdc | 947 | { |
abe60632 | 948 | struct sta_info *sta, *nxt; |
17741cdc | 949 | |
686b9cb9 BG |
950 | /* |
951 | * Just return a random station if localaddr is NULL | |
952 | * ... first in list. | |
953 | */ | |
f7c65594 | 954 | for_each_sta_info(hw_to_local(hw), addr, sta, nxt) { |
686b9cb9 | 955 | if (localaddr && |
b203ca39 | 956 | !ether_addr_equal(sta->sdata->vif.addr, localaddr)) |
686b9cb9 | 957 | continue; |
f7c65594 JB |
958 | if (!sta->uploaded) |
959 | return NULL; | |
abe60632 | 960 | return &sta->sta; |
f7c65594 JB |
961 | } |
962 | ||
abe60632 | 963 | return NULL; |
17741cdc | 964 | } |
686b9cb9 | 965 | EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_ifaddr); |
5ed176e1 JB |
966 | |
967 | struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif, | |
968 | const u8 *addr) | |
969 | { | |
f7c65594 | 970 | struct sta_info *sta; |
5ed176e1 JB |
971 | |
972 | if (!vif) | |
973 | return NULL; | |
974 | ||
f7c65594 JB |
975 | sta = sta_info_get_bss(vif_to_sdata(vif), addr); |
976 | if (!sta) | |
977 | return NULL; | |
978 | ||
979 | if (!sta->uploaded) | |
980 | return NULL; | |
5ed176e1 | 981 | |
f7c65594 | 982 | return &sta->sta; |
5ed176e1 | 983 | } |
17741cdc | 984 | EXPORT_SYMBOL(ieee80211_find_sta); |
af818581 | 985 | |
50a9432d JB |
986 | static void clear_sta_ps_flags(void *_sta) |
987 | { | |
988 | struct sta_info *sta = _sta; | |
608383bf | 989 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
d012a605 MP |
990 | struct ps_data *ps; |
991 | ||
992 | if (sdata->vif.type == NL80211_IFTYPE_AP || | |
993 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
994 | ps = &sdata->bss->ps; | |
995 | else | |
996 | return; | |
50a9432d | 997 | |
c2c98fde | 998 | clear_sta_flag(sta, WLAN_STA_PS_DRIVER); |
608383bf | 999 | if (test_and_clear_sta_flag(sta, WLAN_STA_PS_STA)) |
d012a605 | 1000 | atomic_dec(&ps->num_sta_ps); |
50a9432d JB |
1001 | } |
1002 | ||
af818581 JB |
1003 | /* powersave support code */ |
1004 | void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta) | |
1005 | { | |
1006 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
1007 | struct ieee80211_local *local = sdata->local; | |
948d887d JB |
1008 | struct sk_buff_head pending; |
1009 | int filtered = 0, buffered = 0, ac; | |
987c285c | 1010 | unsigned long flags; |
948d887d | 1011 | |
c2c98fde | 1012 | clear_sta_flag(sta, WLAN_STA_SP); |
47086fc5 | 1013 | |
5a306f58 | 1014 | BUILD_BUG_ON(BITS_TO_LONGS(IEEE80211_NUM_TIDS) > 1); |
948d887d | 1015 | sta->driver_buffered_tids = 0; |
af818581 | 1016 | |
d057e5a3 AN |
1017 | if (!(local->hw.flags & IEEE80211_HW_AP_LINK_PS)) |
1018 | drv_sta_notify(local, sdata, STA_NOTIFY_AWAKE, &sta->sta); | |
af818581 | 1019 | |
948d887d | 1020 | skb_queue_head_init(&pending); |
af818581 JB |
1021 | |
1022 | /* Send all buffered frames to the station */ | |
948d887d JB |
1023 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { |
1024 | int count = skb_queue_len(&pending), tmp; | |
1025 | ||
987c285c | 1026 | spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags); |
948d887d | 1027 | skb_queue_splice_tail_init(&sta->tx_filtered[ac], &pending); |
987c285c | 1028 | spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags); |
948d887d JB |
1029 | tmp = skb_queue_len(&pending); |
1030 | filtered += tmp - count; | |
1031 | count = tmp; | |
1032 | ||
987c285c | 1033 | spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags); |
948d887d | 1034 | skb_queue_splice_tail_init(&sta->ps_tx_buf[ac], &pending); |
987c285c | 1035 | spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags); |
948d887d JB |
1036 | tmp = skb_queue_len(&pending); |
1037 | buffered += tmp - count; | |
1038 | } | |
1039 | ||
1040 | ieee80211_add_pending_skbs_fn(local, &pending, clear_sta_ps_flags, sta); | |
1041 | ||
af818581 JB |
1042 | local->total_ps_buffered -= buffered; |
1043 | ||
c868cb35 JB |
1044 | sta_info_recalc_tim(sta); |
1045 | ||
bdcbd8e0 JB |
1046 | ps_dbg(sdata, |
1047 | "STA %pM aid %d sending %d filtered/%d PS frames since STA not sleeping anymore\n", | |
1048 | sta->sta.addr, sta->sta.aid, filtered, buffered); | |
af818581 JB |
1049 | } |
1050 | ||
ce662b44 JB |
1051 | static void ieee80211_send_null_response(struct ieee80211_sub_if_data *sdata, |
1052 | struct sta_info *sta, int tid, | |
40b96408 | 1053 | enum ieee80211_frame_release_type reason) |
af818581 | 1054 | { |
af818581 | 1055 | struct ieee80211_local *local = sdata->local; |
ce662b44 | 1056 | struct ieee80211_qos_hdr *nullfunc; |
af818581 | 1057 | struct sk_buff *skb; |
ce662b44 JB |
1058 | int size = sizeof(*nullfunc); |
1059 | __le16 fc; | |
c2c98fde | 1060 | bool qos = test_sta_flag(sta, WLAN_STA_WME); |
ce662b44 | 1061 | struct ieee80211_tx_info *info; |
55de908a | 1062 | struct ieee80211_chanctx_conf *chanctx_conf; |
af818581 | 1063 | |
ce662b44 JB |
1064 | if (qos) { |
1065 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | | |
1066 | IEEE80211_STYPE_QOS_NULLFUNC | | |
1067 | IEEE80211_FCTL_FROMDS); | |
1068 | } else { | |
1069 | size -= 2; | |
1070 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | | |
1071 | IEEE80211_STYPE_NULLFUNC | | |
1072 | IEEE80211_FCTL_FROMDS); | |
af818581 | 1073 | } |
af818581 | 1074 | |
ce662b44 JB |
1075 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + size); |
1076 | if (!skb) | |
1077 | return; | |
1078 | ||
1079 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
1080 | ||
1081 | nullfunc = (void *) skb_put(skb, size); | |
1082 | nullfunc->frame_control = fc; | |
1083 | nullfunc->duration_id = 0; | |
1084 | memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN); | |
1085 | memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); | |
1086 | memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN); | |
1087 | ||
59b66255 JB |
1088 | skb->priority = tid; |
1089 | skb_set_queue_mapping(skb, ieee802_1d_to_ac[tid]); | |
ce662b44 | 1090 | if (qos) { |
ce662b44 JB |
1091 | nullfunc->qos_ctrl = cpu_to_le16(tid); |
1092 | ||
40b96408 | 1093 | if (reason == IEEE80211_FRAME_RELEASE_UAPSD) |
ce662b44 JB |
1094 | nullfunc->qos_ctrl |= |
1095 | cpu_to_le16(IEEE80211_QOS_CTL_EOSP); | |
1096 | } | |
1097 | ||
1098 | info = IEEE80211_SKB_CB(skb); | |
1099 | ||
1100 | /* | |
1101 | * Tell TX path to send this frame even though the | |
1102 | * STA may still remain is PS mode after this frame | |
deeaee19 JB |
1103 | * exchange. Also set EOSP to indicate this packet |
1104 | * ends the poll/service period. | |
ce662b44 | 1105 | */ |
02f2f1a9 | 1106 | info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER | |
deeaee19 JB |
1107 | IEEE80211_TX_STATUS_EOSP | |
1108 | IEEE80211_TX_CTL_REQ_TX_STATUS; | |
ce662b44 | 1109 | |
40b96408 JB |
1110 | drv_allow_buffered_frames(local, sta, BIT(tid), 1, reason, false); |
1111 | ||
55de908a JB |
1112 | rcu_read_lock(); |
1113 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
1114 | if (WARN_ON(!chanctx_conf)) { | |
1115 | rcu_read_unlock(); | |
1116 | kfree_skb(skb); | |
1117 | return; | |
1118 | } | |
1119 | ||
4bf88530 | 1120 | ieee80211_xmit(sdata, skb, chanctx_conf->def.chan->band); |
55de908a | 1121 | rcu_read_unlock(); |
ce662b44 JB |
1122 | } |
1123 | ||
47086fc5 JB |
1124 | static void |
1125 | ieee80211_sta_ps_deliver_response(struct sta_info *sta, | |
1126 | int n_frames, u8 ignored_acs, | |
1127 | enum ieee80211_frame_release_type reason) | |
af818581 JB |
1128 | { |
1129 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
1130 | struct ieee80211_local *local = sdata->local; | |
4049e09a | 1131 | bool found = false; |
948d887d JB |
1132 | bool more_data = false; |
1133 | int ac; | |
4049e09a | 1134 | unsigned long driver_release_tids = 0; |
47086fc5 | 1135 | struct sk_buff_head frames; |
af818581 | 1136 | |
deeaee19 | 1137 | /* Service or PS-Poll period starts */ |
c2c98fde | 1138 | set_sta_flag(sta, WLAN_STA_SP); |
deeaee19 | 1139 | |
47086fc5 | 1140 | __skb_queue_head_init(&frames); |
948d887d JB |
1141 | |
1142 | /* | |
47086fc5 | 1143 | * Get response frame(s) and more data bit for it. |
948d887d JB |
1144 | */ |
1145 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { | |
4049e09a JB |
1146 | unsigned long tids; |
1147 | ||
47086fc5 | 1148 | if (ignored_acs & BIT(ac)) |
948d887d JB |
1149 | continue; |
1150 | ||
4049e09a JB |
1151 | tids = ieee80211_tids_for_ac(ac); |
1152 | ||
1153 | if (!found) { | |
1154 | driver_release_tids = sta->driver_buffered_tids & tids; | |
1155 | if (driver_release_tids) { | |
1156 | found = true; | |
1157 | } else { | |
47086fc5 JB |
1158 | struct sk_buff *skb; |
1159 | ||
1160 | while (n_frames > 0) { | |
1161 | skb = skb_dequeue(&sta->tx_filtered[ac]); | |
1162 | if (!skb) { | |
1163 | skb = skb_dequeue( | |
1164 | &sta->ps_tx_buf[ac]); | |
1165 | if (skb) | |
1166 | local->total_ps_buffered--; | |
1167 | } | |
1168 | if (!skb) | |
1169 | break; | |
1170 | n_frames--; | |
4049e09a | 1171 | found = true; |
47086fc5 JB |
1172 | __skb_queue_tail(&frames, skb); |
1173 | } | |
948d887d | 1174 | } |
948d887d | 1175 | |
4049e09a JB |
1176 | /* |
1177 | * If the driver has data on more than one TID then | |
1178 | * certainly there's more data if we release just a | |
1179 | * single frame now (from a single TID). | |
1180 | */ | |
47086fc5 JB |
1181 | if (reason == IEEE80211_FRAME_RELEASE_PSPOLL && |
1182 | hweight16(driver_release_tids) > 1) { | |
4049e09a JB |
1183 | more_data = true; |
1184 | driver_release_tids = | |
1185 | BIT(ffs(driver_release_tids) - 1); | |
1186 | break; | |
1187 | } | |
1188 | } | |
948d887d JB |
1189 | |
1190 | if (!skb_queue_empty(&sta->tx_filtered[ac]) || | |
1191 | !skb_queue_empty(&sta->ps_tx_buf[ac])) { | |
1192 | more_data = true; | |
1193 | break; | |
1194 | } | |
af818581 | 1195 | } |
af818581 | 1196 | |
4049e09a | 1197 | if (!found) { |
ce662b44 | 1198 | int tid; |
af818581 JB |
1199 | |
1200 | /* | |
ce662b44 JB |
1201 | * For PS-Poll, this can only happen due to a race condition |
1202 | * when we set the TIM bit and the station notices it, but | |
1203 | * before it can poll for the frame we expire it. | |
1204 | * | |
1205 | * For uAPSD, this is said in the standard (11.2.1.5 h): | |
1206 | * At each unscheduled SP for a non-AP STA, the AP shall | |
1207 | * attempt to transmit at least one MSDU or MMPDU, but no | |
1208 | * more than the value specified in the Max SP Length field | |
1209 | * in the QoS Capability element from delivery-enabled ACs, | |
1210 | * that are destined for the non-AP STA. | |
1211 | * | |
1212 | * Since we have no other MSDU/MMPDU, transmit a QoS null frame. | |
af818581 | 1213 | */ |
af818581 | 1214 | |
ce662b44 JB |
1215 | /* This will evaluate to 1, 3, 5 or 7. */ |
1216 | tid = 7 - ((ffs(~ignored_acs) - 1) << 1); | |
af818581 | 1217 | |
40b96408 | 1218 | ieee80211_send_null_response(sdata, sta, tid, reason); |
4049e09a JB |
1219 | return; |
1220 | } | |
af818581 | 1221 | |
47086fc5 JB |
1222 | if (!driver_release_tids) { |
1223 | struct sk_buff_head pending; | |
1224 | struct sk_buff *skb; | |
40b96408 JB |
1225 | int num = 0; |
1226 | u16 tids = 0; | |
af818581 | 1227 | |
47086fc5 | 1228 | skb_queue_head_init(&pending); |
af818581 | 1229 | |
47086fc5 JB |
1230 | while ((skb = __skb_dequeue(&frames))) { |
1231 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1232 | struct ieee80211_hdr *hdr = (void *) skb->data; | |
40b96408 JB |
1233 | u8 *qoshdr = NULL; |
1234 | ||
1235 | num++; | |
af818581 | 1236 | |
47086fc5 JB |
1237 | /* |
1238 | * Tell TX path to send this frame even though the | |
1239 | * STA may still remain is PS mode after this frame | |
1240 | * exchange. | |
1241 | */ | |
02f2f1a9 | 1242 | info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER; |
47086fc5 JB |
1243 | |
1244 | /* | |
1245 | * Use MoreData flag to indicate whether there are | |
1246 | * more buffered frames for this STA | |
1247 | */ | |
24b9c373 | 1248 | if (more_data || !skb_queue_empty(&frames)) |
47086fc5 JB |
1249 | hdr->frame_control |= |
1250 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
24b9c373 JD |
1251 | else |
1252 | hdr->frame_control &= | |
1253 | cpu_to_le16(~IEEE80211_FCTL_MOREDATA); | |
47086fc5 | 1254 | |
40b96408 JB |
1255 | if (ieee80211_is_data_qos(hdr->frame_control) || |
1256 | ieee80211_is_qos_nullfunc(hdr->frame_control)) | |
1257 | qoshdr = ieee80211_get_qos_ctl(hdr); | |
1258 | ||
52a3f20c MP |
1259 | /* end service period after last frame */ |
1260 | if (skb_queue_empty(&frames)) { | |
1261 | if (reason == IEEE80211_FRAME_RELEASE_UAPSD && | |
1262 | qoshdr) | |
1263 | *qoshdr |= IEEE80211_QOS_CTL_EOSP; | |
1264 | ||
1265 | info->flags |= IEEE80211_TX_STATUS_EOSP | | |
1266 | IEEE80211_TX_CTL_REQ_TX_STATUS; | |
1267 | } | |
deeaee19 | 1268 | |
40b96408 JB |
1269 | if (qoshdr) |
1270 | tids |= BIT(*qoshdr & IEEE80211_QOS_CTL_TID_MASK); | |
1271 | else | |
1272 | tids |= BIT(0); | |
1273 | ||
47086fc5 JB |
1274 | __skb_queue_tail(&pending, skb); |
1275 | } | |
af818581 | 1276 | |
40b96408 JB |
1277 | drv_allow_buffered_frames(local, sta, tids, num, |
1278 | reason, more_data); | |
1279 | ||
47086fc5 | 1280 | ieee80211_add_pending_skbs(local, &pending); |
af818581 | 1281 | |
c868cb35 | 1282 | sta_info_recalc_tim(sta); |
af818581 JB |
1283 | } else { |
1284 | /* | |
4049e09a JB |
1285 | * We need to release a frame that is buffered somewhere in the |
1286 | * driver ... it'll have to handle that. | |
1287 | * Note that, as per the comment above, it'll also have to see | |
1288 | * if there is more than just one frame on the specific TID that | |
1289 | * we're releasing from, and it needs to set the more-data bit | |
1290 | * accordingly if we tell it that there's no more data. If we do | |
1291 | * tell it there's more data, then of course the more-data bit | |
1292 | * needs to be set anyway. | |
1293 | */ | |
1294 | drv_release_buffered_frames(local, sta, driver_release_tids, | |
47086fc5 | 1295 | n_frames, reason, more_data); |
4049e09a JB |
1296 | |
1297 | /* | |
1298 | * Note that we don't recalculate the TIM bit here as it would | |
1299 | * most likely have no effect at all unless the driver told us | |
1300 | * that the TID became empty before returning here from the | |
1301 | * release function. | |
1302 | * Either way, however, when the driver tells us that the TID | |
1303 | * became empty we'll do the TIM recalculation. | |
af818581 | 1304 | */ |
af818581 JB |
1305 | } |
1306 | } | |
1307 | ||
47086fc5 JB |
1308 | void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta) |
1309 | { | |
1310 | u8 ignore_for_response = sta->sta.uapsd_queues; | |
1311 | ||
1312 | /* | |
1313 | * If all ACs are delivery-enabled then we should reply | |
1314 | * from any of them, if only some are enabled we reply | |
1315 | * only from the non-enabled ones. | |
1316 | */ | |
1317 | if (ignore_for_response == BIT(IEEE80211_NUM_ACS) - 1) | |
1318 | ignore_for_response = 0; | |
1319 | ||
1320 | ieee80211_sta_ps_deliver_response(sta, 1, ignore_for_response, | |
1321 | IEEE80211_FRAME_RELEASE_PSPOLL); | |
1322 | } | |
1323 | ||
1324 | void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta) | |
1325 | { | |
1326 | int n_frames = sta->sta.max_sp; | |
1327 | u8 delivery_enabled = sta->sta.uapsd_queues; | |
1328 | ||
1329 | /* | |
1330 | * If we ever grow support for TSPEC this might happen if | |
1331 | * the TSPEC update from hostapd comes in between a trigger | |
1332 | * frame setting WLAN_STA_UAPSD in the RX path and this | |
1333 | * actually getting called. | |
1334 | */ | |
1335 | if (!delivery_enabled) | |
1336 | return; | |
1337 | ||
47086fc5 JB |
1338 | switch (sta->sta.max_sp) { |
1339 | case 1: | |
1340 | n_frames = 2; | |
1341 | break; | |
1342 | case 2: | |
1343 | n_frames = 4; | |
1344 | break; | |
1345 | case 3: | |
1346 | n_frames = 6; | |
1347 | break; | |
1348 | case 0: | |
1349 | /* XXX: what is a good value? */ | |
1350 | n_frames = 8; | |
1351 | break; | |
1352 | } | |
1353 | ||
1354 | ieee80211_sta_ps_deliver_response(sta, n_frames, ~delivery_enabled, | |
1355 | IEEE80211_FRAME_RELEASE_UAPSD); | |
1356 | } | |
1357 | ||
af818581 JB |
1358 | void ieee80211_sta_block_awake(struct ieee80211_hw *hw, |
1359 | struct ieee80211_sta *pubsta, bool block) | |
1360 | { | |
1361 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
1362 | ||
b5878a2d JB |
1363 | trace_api_sta_block_awake(sta->local, pubsta, block); |
1364 | ||
af818581 | 1365 | if (block) |
c2c98fde JB |
1366 | set_sta_flag(sta, WLAN_STA_PS_DRIVER); |
1367 | else if (test_sta_flag(sta, WLAN_STA_PS_DRIVER)) | |
af818581 JB |
1368 | ieee80211_queue_work(hw, &sta->drv_unblock_wk); |
1369 | } | |
1370 | EXPORT_SYMBOL(ieee80211_sta_block_awake); | |
dcf55fb5 | 1371 | |
37fbd908 JB |
1372 | void ieee80211_sta_eosp_irqsafe(struct ieee80211_sta *pubsta) |
1373 | { | |
1374 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
1375 | struct ieee80211_local *local = sta->local; | |
1376 | struct sk_buff *skb; | |
1377 | struct skb_eosp_msg_data *data; | |
1378 | ||
1379 | trace_api_eosp(local, pubsta); | |
1380 | ||
1381 | skb = alloc_skb(0, GFP_ATOMIC); | |
1382 | if (!skb) { | |
1383 | /* too bad ... but race is better than loss */ | |
1384 | clear_sta_flag(sta, WLAN_STA_SP); | |
1385 | return; | |
1386 | } | |
1387 | ||
1388 | data = (void *)skb->cb; | |
1389 | memcpy(data->sta, pubsta->addr, ETH_ALEN); | |
1390 | memcpy(data->iface, sta->sdata->vif.addr, ETH_ALEN); | |
1391 | skb->pkt_type = IEEE80211_EOSP_MSG; | |
1392 | skb_queue_tail(&local->skb_queue, skb); | |
1393 | tasklet_schedule(&local->tasklet); | |
1394 | } | |
1395 | EXPORT_SYMBOL(ieee80211_sta_eosp_irqsafe); | |
1396 | ||
042ec453 JB |
1397 | void ieee80211_sta_set_buffered(struct ieee80211_sta *pubsta, |
1398 | u8 tid, bool buffered) | |
dcf55fb5 FF |
1399 | { |
1400 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
1401 | ||
5a306f58 | 1402 | if (WARN_ON(tid >= IEEE80211_NUM_TIDS)) |
042ec453 JB |
1403 | return; |
1404 | ||
948d887d JB |
1405 | if (buffered) |
1406 | set_bit(tid, &sta->driver_buffered_tids); | |
1407 | else | |
1408 | clear_bit(tid, &sta->driver_buffered_tids); | |
1409 | ||
c868cb35 | 1410 | sta_info_recalc_tim(sta); |
dcf55fb5 | 1411 | } |
042ec453 | 1412 | EXPORT_SYMBOL(ieee80211_sta_set_buffered); |
d9a7ddb0 | 1413 | |
83d5cc01 JB |
1414 | int sta_info_move_state(struct sta_info *sta, |
1415 | enum ieee80211_sta_state new_state) | |
d9a7ddb0 | 1416 | { |
8bf11d8d | 1417 | might_sleep(); |
d9a7ddb0 JB |
1418 | |
1419 | if (sta->sta_state == new_state) | |
1420 | return 0; | |
1421 | ||
f09603a2 JB |
1422 | /* check allowed transitions first */ |
1423 | ||
1424 | switch (new_state) { | |
1425 | case IEEE80211_STA_NONE: | |
1426 | if (sta->sta_state != IEEE80211_STA_AUTH) | |
1427 | return -EINVAL; | |
1428 | break; | |
1429 | case IEEE80211_STA_AUTH: | |
1430 | if (sta->sta_state != IEEE80211_STA_NONE && | |
1431 | sta->sta_state != IEEE80211_STA_ASSOC) | |
1432 | return -EINVAL; | |
1433 | break; | |
1434 | case IEEE80211_STA_ASSOC: | |
1435 | if (sta->sta_state != IEEE80211_STA_AUTH && | |
1436 | sta->sta_state != IEEE80211_STA_AUTHORIZED) | |
1437 | return -EINVAL; | |
1438 | break; | |
1439 | case IEEE80211_STA_AUTHORIZED: | |
1440 | if (sta->sta_state != IEEE80211_STA_ASSOC) | |
1441 | return -EINVAL; | |
1442 | break; | |
1443 | default: | |
1444 | WARN(1, "invalid state %d", new_state); | |
1445 | return -EINVAL; | |
1446 | } | |
1447 | ||
bdcbd8e0 JB |
1448 | sta_dbg(sta->sdata, "moving STA %pM to state %d\n", |
1449 | sta->sta.addr, new_state); | |
f09603a2 JB |
1450 | |
1451 | /* | |
1452 | * notify the driver before the actual changes so it can | |
1453 | * fail the transition | |
1454 | */ | |
1455 | if (test_sta_flag(sta, WLAN_STA_INSERTED)) { | |
1456 | int err = drv_sta_state(sta->local, sta->sdata, sta, | |
1457 | sta->sta_state, new_state); | |
1458 | if (err) | |
1459 | return err; | |
1460 | } | |
1461 | ||
1462 | /* reflect the change in all state variables */ | |
1463 | ||
d9a7ddb0 JB |
1464 | switch (new_state) { |
1465 | case IEEE80211_STA_NONE: | |
1466 | if (sta->sta_state == IEEE80211_STA_AUTH) | |
1467 | clear_bit(WLAN_STA_AUTH, &sta->_flags); | |
d9a7ddb0 JB |
1468 | break; |
1469 | case IEEE80211_STA_AUTH: | |
1470 | if (sta->sta_state == IEEE80211_STA_NONE) | |
1471 | set_bit(WLAN_STA_AUTH, &sta->_flags); | |
1472 | else if (sta->sta_state == IEEE80211_STA_ASSOC) | |
1473 | clear_bit(WLAN_STA_ASSOC, &sta->_flags); | |
d9a7ddb0 JB |
1474 | break; |
1475 | case IEEE80211_STA_ASSOC: | |
29623892 | 1476 | if (sta->sta_state == IEEE80211_STA_AUTH) { |
d9a7ddb0 | 1477 | set_bit(WLAN_STA_ASSOC, &sta->_flags); |
29623892 | 1478 | } else if (sta->sta_state == IEEE80211_STA_AUTHORIZED) { |
7e3ed02c FF |
1479 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP || |
1480 | (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
1481 | !sta->sdata->u.vlan.sta)) | |
1482 | atomic_dec(&sta->sdata->bss->num_mcast_sta); | |
d9a7ddb0 | 1483 | clear_bit(WLAN_STA_AUTHORIZED, &sta->_flags); |
f09603a2 | 1484 | } |
d9a7ddb0 JB |
1485 | break; |
1486 | case IEEE80211_STA_AUTHORIZED: | |
29623892 | 1487 | if (sta->sta_state == IEEE80211_STA_ASSOC) { |
7e3ed02c FF |
1488 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP || |
1489 | (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
1490 | !sta->sdata->u.vlan.sta)) | |
1491 | atomic_inc(&sta->sdata->bss->num_mcast_sta); | |
d9a7ddb0 | 1492 | set_bit(WLAN_STA_AUTHORIZED, &sta->_flags); |
f09603a2 | 1493 | } |
d9a7ddb0 JB |
1494 | break; |
1495 | default: | |
f09603a2 | 1496 | break; |
d9a7ddb0 JB |
1497 | } |
1498 | ||
d9a7ddb0 JB |
1499 | sta->sta_state = new_state; |
1500 | ||
1501 | return 0; | |
1502 | } |