Commit | Line | Data |
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fe7a5d5c JB |
1 | /* |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2005-2006, Devicescape Software, Inc. | |
4 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
026331c4 | 5 | * Copyright 2008-2010 Johannes Berg <johannes@sipsolutions.net> |
fe7a5d5c JB |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | ||
12 | #include <net/mac80211.h> | |
13 | #include "ieee80211_i.h" | |
14 | #include "rate.h" | |
15 | #include "mesh.h" | |
16 | #include "led.h" | |
948d887d | 17 | #include "wme.h" |
fe7a5d5c JB |
18 | |
19 | ||
20 | void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, | |
21 | struct sk_buff *skb) | |
22 | { | |
23 | struct ieee80211_local *local = hw_to_local(hw); | |
24 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
25 | int tmp; | |
26 | ||
27 | skb->pkt_type = IEEE80211_TX_STATUS_MSG; | |
28 | skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ? | |
29 | &local->skb_queue : &local->skb_queue_unreliable, skb); | |
30 | tmp = skb_queue_len(&local->skb_queue) + | |
31 | skb_queue_len(&local->skb_queue_unreliable); | |
32 | while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT && | |
33 | (skb = skb_dequeue(&local->skb_queue_unreliable))) { | |
34 | dev_kfree_skb_irq(skb); | |
35 | tmp--; | |
36 | I802_DEBUG_INC(local->tx_status_drop); | |
37 | } | |
38 | tasklet_schedule(&local->tasklet); | |
39 | } | |
40 | EXPORT_SYMBOL(ieee80211_tx_status_irqsafe); | |
41 | ||
42 | static void ieee80211_handle_filtered_frame(struct ieee80211_local *local, | |
43 | struct sta_info *sta, | |
44 | struct sk_buff *skb) | |
45 | { | |
46 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
948d887d JB |
47 | struct ieee80211_hdr *hdr = (void *)skb->data; |
48 | int ac; | |
fe7a5d5c | 49 | |
697e6a0f JB |
50 | /* |
51 | * This skb 'survived' a round-trip through the driver, and | |
52 | * hopefully the driver didn't mangle it too badly. However, | |
77c2061d | 53 | * we can definitely not rely on the control information |
c6fcf6bc JB |
54 | * being correct. Clear it so we don't get junk there, and |
55 | * indicate that it needs new processing, but must not be | |
56 | * modified/encrypted again. | |
697e6a0f JB |
57 | */ |
58 | memset(&info->control, 0, sizeof(info->control)); | |
18c94907 JB |
59 | |
60 | info->control.jiffies = jiffies; | |
61 | info->control.vif = &sta->sdata->vif; | |
c6fcf6bc JB |
62 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING | |
63 | IEEE80211_TX_INTFL_RETRANSMISSION; | |
eb7d3066 | 64 | info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS; |
697e6a0f | 65 | |
fe7a5d5c JB |
66 | sta->tx_filtered_count++; |
67 | ||
8a8656fa JB |
68 | /* |
69 | * Clear more-data bit on filtered frames, it might be set | |
70 | * but later frames might time out so it might have to be | |
71 | * clear again ... It's all rather unlikely (this frame | |
72 | * should time out first, right?) but let's not confuse | |
73 | * peers unnecessarily. | |
74 | */ | |
75 | if (hdr->frame_control & cpu_to_le16(IEEE80211_FCTL_MOREDATA)) | |
76 | hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
77 | ||
948d887d | 78 | if (ieee80211_is_data_qos(hdr->frame_control)) { |
47086fc5 JB |
79 | u8 *p = ieee80211_get_qos_ctl(hdr); |
80 | int tid = *p & IEEE80211_QOS_CTL_TID_MASK; | |
81 | ||
82 | /* | |
83 | * Clear EOSP if set, this could happen e.g. | |
84 | * if an absence period (us being a P2P GO) | |
85 | * shortens the SP. | |
86 | */ | |
87 | if (*p & IEEE80211_QOS_CTL_EOSP) | |
88 | *p &= ~IEEE80211_QOS_CTL_EOSP; | |
948d887d JB |
89 | ac = ieee802_1d_to_ac[tid & 7]; |
90 | } else { | |
91 | ac = IEEE80211_AC_BE; | |
92 | } | |
93 | ||
fe7a5d5c JB |
94 | /* |
95 | * Clear the TX filter mask for this STA when sending the next | |
96 | * packet. If the STA went to power save mode, this will happen | |
97 | * when it wakes up for the next time. | |
98 | */ | |
99 | set_sta_flags(sta, WLAN_STA_CLEAR_PS_FILT); | |
100 | ||
101 | /* | |
102 | * This code races in the following way: | |
103 | * | |
104 | * (1) STA sends frame indicating it will go to sleep and does so | |
105 | * (2) hardware/firmware adds STA to filter list, passes frame up | |
106 | * (3) hardware/firmware processes TX fifo and suppresses a frame | |
107 | * (4) we get TX status before having processed the frame and | |
108 | * knowing that the STA has gone to sleep. | |
109 | * | |
110 | * This is actually quite unlikely even when both those events are | |
111 | * processed from interrupts coming in quickly after one another or | |
112 | * even at the same time because we queue both TX status events and | |
113 | * RX frames to be processed by a tasklet and process them in the | |
114 | * same order that they were received or TX status last. Hence, there | |
115 | * is no race as long as the frame RX is processed before the next TX | |
116 | * status, which drivers can ensure, see below. | |
117 | * | |
118 | * Note that this can only happen if the hardware or firmware can | |
119 | * actually add STAs to the filter list, if this is done by the | |
120 | * driver in response to set_tim() (which will only reduce the race | |
121 | * this whole filtering tries to solve, not completely solve it) | |
122 | * this situation cannot happen. | |
123 | * | |
124 | * To completely solve this race drivers need to make sure that they | |
125 | * (a) don't mix the irq-safe/not irq-safe TX status/RX processing | |
126 | * functions and | |
127 | * (b) always process RX events before TX status events if ordering | |
128 | * can be unknown, for example with different interrupt status | |
129 | * bits. | |
d057e5a3 AN |
130 | * (c) if PS mode transitions are manual (i.e. the flag |
131 | * %IEEE80211_HW_AP_LINK_PS is set), always process PS state | |
132 | * changes before calling TX status events if ordering can be | |
133 | * unknown. | |
fe7a5d5c JB |
134 | */ |
135 | if (test_sta_flags(sta, WLAN_STA_PS_STA) && | |
948d887d JB |
136 | skb_queue_len(&sta->tx_filtered[ac]) < STA_MAX_TX_BUFFER) { |
137 | skb_queue_tail(&sta->tx_filtered[ac], skb); | |
c868cb35 | 138 | sta_info_recalc_tim(sta); |
60750397 JB |
139 | |
140 | if (!timer_pending(&local->sta_cleanup)) | |
141 | mod_timer(&local->sta_cleanup, | |
142 | round_jiffies(jiffies + | |
143 | STA_INFO_CLEANUP_INTERVAL)); | |
fe7a5d5c JB |
144 | return; |
145 | } | |
146 | ||
147 | if (!test_sta_flags(sta, WLAN_STA_PS_STA) && | |
148 | !(info->flags & IEEE80211_TX_INTFL_RETRIED)) { | |
149 | /* Software retry the packet once */ | |
150 | info->flags |= IEEE80211_TX_INTFL_RETRIED; | |
151 | ieee80211_add_pending_skb(local, skb); | |
152 | return; | |
153 | } | |
154 | ||
fe7a5d5c JB |
155 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
156 | if (net_ratelimit()) | |
0fb9a9ec JP |
157 | wiphy_debug(local->hw.wiphy, |
158 | "dropped TX filtered frame, queue_len=%d PS=%d @%lu\n", | |
948d887d | 159 | skb_queue_len(&sta->tx_filtered[ac]), |
0fb9a9ec | 160 | !!test_sta_flags(sta, WLAN_STA_PS_STA), jiffies); |
fe7a5d5c JB |
161 | #endif |
162 | dev_kfree_skb(skb); | |
163 | } | |
164 | ||
f0425bed FF |
165 | static void ieee80211_check_pending_bar(struct sta_info *sta, u8 *addr, u8 tid) |
166 | { | |
167 | struct tid_ampdu_tx *tid_tx; | |
168 | ||
169 | tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); | |
170 | if (!tid_tx || !tid_tx->bar_pending) | |
171 | return; | |
172 | ||
173 | tid_tx->bar_pending = false; | |
8c771244 | 174 | ieee80211_send_bar(&sta->sdata->vif, addr, tid, tid_tx->failed_bar_ssn); |
f0425bed FF |
175 | } |
176 | ||
0f78231b JB |
177 | static void ieee80211_frame_acked(struct sta_info *sta, struct sk_buff *skb) |
178 | { | |
179 | struct ieee80211_mgmt *mgmt = (void *) skb->data; | |
180 | struct ieee80211_local *local = sta->local; | |
181 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
182 | ||
f0425bed FF |
183 | if (ieee80211_is_data_qos(mgmt->frame_control)) { |
184 | struct ieee80211_hdr *hdr = (void *) skb->data; | |
185 | u8 *qc = ieee80211_get_qos_ctl(hdr); | |
186 | u16 tid = qc[0] & 0xf; | |
187 | ||
188 | ieee80211_check_pending_bar(sta, hdr->addr1, tid); | |
189 | } | |
190 | ||
0f78231b JB |
191 | if (ieee80211_is_action(mgmt->frame_control) && |
192 | sdata->vif.type == NL80211_IFTYPE_STATION && | |
193 | mgmt->u.action.category == WLAN_CATEGORY_HT && | |
194 | mgmt->u.action.u.ht_smps.action == WLAN_HT_ACTION_SMPS) { | |
195 | /* | |
196 | * This update looks racy, but isn't -- if we come | |
197 | * here we've definitely got a station that we're | |
198 | * talking to, and on a managed interface that can | |
199 | * only be the AP. And the only other place updating | |
200 | * this variable is before we're associated. | |
201 | */ | |
202 | switch (mgmt->u.action.u.ht_smps.smps_control) { | |
203 | case WLAN_HT_SMPS_CONTROL_DYNAMIC: | |
204 | sta->sdata->u.mgd.ap_smps = IEEE80211_SMPS_DYNAMIC; | |
205 | break; | |
206 | case WLAN_HT_SMPS_CONTROL_STATIC: | |
207 | sta->sdata->u.mgd.ap_smps = IEEE80211_SMPS_STATIC; | |
208 | break; | |
209 | case WLAN_HT_SMPS_CONTROL_DISABLED: | |
210 | default: /* shouldn't happen since we don't send that */ | |
211 | sta->sdata->u.mgd.ap_smps = IEEE80211_SMPS_OFF; | |
212 | break; | |
213 | } | |
214 | ||
215 | ieee80211_queue_work(&local->hw, &local->recalc_smps); | |
216 | } | |
217 | } | |
218 | ||
f0425bed FF |
219 | static void ieee80211_set_bar_pending(struct sta_info *sta, u8 tid, u16 ssn) |
220 | { | |
221 | struct tid_ampdu_tx *tid_tx; | |
222 | ||
223 | tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); | |
224 | if (!tid_tx) | |
225 | return; | |
226 | ||
227 | tid_tx->failed_bar_ssn = ssn; | |
228 | tid_tx->bar_pending = true; | |
229 | } | |
230 | ||
99ba2a14 JB |
231 | /* |
232 | * Use a static threshold for now, best value to be determined | |
233 | * by testing ... | |
234 | * Should it depend on: | |
235 | * - on # of retransmissions | |
236 | * - current throughput (higher value for higher tpt)? | |
237 | */ | |
238 | #define STA_LOST_PKT_THRESHOLD 50 | |
239 | ||
fe7a5d5c JB |
240 | void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb) |
241 | { | |
242 | struct sk_buff *skb2; | |
243 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
244 | struct ieee80211_local *local = hw_to_local(hw); | |
245 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
246 | u16 frag, type; | |
247 | __le16 fc; | |
248 | struct ieee80211_supported_band *sband; | |
249 | struct ieee80211_tx_status_rtap_hdr *rthdr; | |
250 | struct ieee80211_sub_if_data *sdata; | |
251 | struct net_device *prev_dev = NULL; | |
abe60632 | 252 | struct sta_info *sta, *tmp; |
fe7a5d5c | 253 | int retry_count = -1, i; |
0c869808 | 254 | int rates_idx = -1; |
eaf55530 | 255 | bool send_to_cooked; |
04ac3c0e | 256 | bool acked; |
e69deded HS |
257 | struct ieee80211_bar *bar; |
258 | u16 tid; | |
fe7a5d5c JB |
259 | |
260 | for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) { | |
be7974aa HS |
261 | if (info->status.rates[i].idx < 0) { |
262 | break; | |
263 | } else if (i >= hw->max_report_rates) { | |
264 | /* the HW cannot have attempted that rate */ | |
fe7a5d5c JB |
265 | info->status.rates[i].idx = -1; |
266 | info->status.rates[i].count = 0; | |
be7974aa | 267 | break; |
fe7a5d5c JB |
268 | } |
269 | ||
270 | retry_count += info->status.rates[i].count; | |
271 | } | |
be7974aa HS |
272 | rates_idx = i - 1; |
273 | ||
fe7a5d5c JB |
274 | if (retry_count < 0) |
275 | retry_count = 0; | |
276 | ||
277 | rcu_read_lock(); | |
278 | ||
279 | sband = local->hw.wiphy->bands[info->band]; | |
375177bf | 280 | fc = hdr->frame_control; |
fe7a5d5c | 281 | |
abe60632 JB |
282 | for_each_sta_info(local, hdr->addr1, sta, tmp) { |
283 | /* skip wrong virtual interface */ | |
47846c9b | 284 | if (memcmp(hdr->addr2, sta->sdata->vif.addr, ETH_ALEN)) |
abe60632 | 285 | continue; |
fe7a5d5c | 286 | |
47086fc5 JB |
287 | if (info->flags & IEEE80211_TX_STATUS_EOSP) |
288 | clear_sta_flags(sta, WLAN_STA_SP); | |
289 | ||
04ac3c0e FF |
290 | acked = !!(info->flags & IEEE80211_TX_STAT_ACK); |
291 | if (!acked && test_sta_flags(sta, WLAN_STA_PS_STA)) { | |
fe7a5d5c JB |
292 | /* |
293 | * The STA is in power save mode, so assume | |
294 | * that this TX packet failed because of that. | |
295 | */ | |
296 | ieee80211_handle_filtered_frame(local, sta, skb); | |
297 | rcu_read_unlock(); | |
298 | return; | |
299 | } | |
300 | ||
0c869808 JO |
301 | if ((local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL) && |
302 | (rates_idx != -1)) | |
303 | sta->last_tx_rate = info->status.rates[rates_idx]; | |
304 | ||
fe7a5d5c JB |
305 | if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) && |
306 | (ieee80211_is_data_qos(fc))) { | |
307 | u16 tid, ssn; | |
308 | u8 *qc; | |
309 | ||
310 | qc = ieee80211_get_qos_ctl(hdr); | |
311 | tid = qc[0] & 0xf; | |
312 | ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10) | |
313 | & IEEE80211_SCTL_SEQ); | |
8c771244 | 314 | ieee80211_send_bar(&sta->sdata->vif, hdr->addr1, |
fe7a5d5c JB |
315 | tid, ssn); |
316 | } | |
317 | ||
e69deded | 318 | if (!acked && ieee80211_is_back_req(fc)) { |
7107676a FF |
319 | u16 control; |
320 | ||
e69deded | 321 | /* |
7107676a FF |
322 | * BAR failed, store the last SSN and retry sending |
323 | * the BAR when the next unicast transmission on the | |
324 | * same TID succeeds. | |
e69deded HS |
325 | */ |
326 | bar = (struct ieee80211_bar *) skb->data; | |
7107676a FF |
327 | control = le16_to_cpu(bar->control); |
328 | if (!(control & IEEE80211_BAR_CTRL_MULTI_TID)) { | |
f0425bed FF |
329 | u16 ssn = le16_to_cpu(bar->start_seq_num); |
330 | ||
7107676a | 331 | tid = (control & |
e69deded HS |
332 | IEEE80211_BAR_CTRL_TID_INFO_MASK) >> |
333 | IEEE80211_BAR_CTRL_TID_INFO_SHIFT; | |
f0425bed FF |
334 | |
335 | ieee80211_set_bar_pending(sta, tid, ssn); | |
e69deded HS |
336 | } |
337 | } | |
338 | ||
fe7a5d5c JB |
339 | if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) { |
340 | ieee80211_handle_filtered_frame(local, sta, skb); | |
341 | rcu_read_unlock(); | |
342 | return; | |
343 | } else { | |
04ac3c0e | 344 | if (!acked) |
fe7a5d5c JB |
345 | sta->tx_retry_failed++; |
346 | sta->tx_retry_count += retry_count; | |
347 | } | |
348 | ||
349 | rate_control_tx_status(local, sband, sta, skb); | |
350 | if (ieee80211_vif_is_mesh(&sta->sdata->vif)) | |
351 | ieee80211s_update_metric(local, sta, skb); | |
0f78231b | 352 | |
04ac3c0e | 353 | if (!(info->flags & IEEE80211_TX_CTL_INJECTED) && acked) |
0f78231b | 354 | ieee80211_frame_acked(sta, skb); |
99ba2a14 | 355 | |
04ac3c0e FF |
356 | if ((sta->sdata->vif.type == NL80211_IFTYPE_STATION) && |
357 | (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) | |
358 | ieee80211_sta_tx_notify(sta->sdata, (void *) skb->data, acked); | |
359 | ||
99ba2a14 JB |
360 | if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) { |
361 | if (info->flags & IEEE80211_TX_STAT_ACK) { | |
362 | if (sta->lost_packets) | |
363 | sta->lost_packets = 0; | |
364 | } else if (++sta->lost_packets >= STA_LOST_PKT_THRESHOLD) { | |
365 | cfg80211_cqm_pktloss_notify(sta->sdata->dev, | |
366 | sta->sta.addr, | |
367 | sta->lost_packets, | |
368 | GFP_ATOMIC); | |
369 | sta->lost_packets = 0; | |
370 | } | |
371 | } | |
fe7a5d5c JB |
372 | } |
373 | ||
374 | rcu_read_unlock(); | |
375 | ||
376 | ieee80211_led_tx(local, 0); | |
377 | ||
378 | /* SNMP counters | |
379 | * Fragments are passed to low-level drivers as separate skbs, so these | |
380 | * are actually fragments, not frames. Update frame counters only for | |
381 | * the first fragment of the frame. */ | |
382 | ||
383 | frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG; | |
384 | type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE; | |
385 | ||
386 | if (info->flags & IEEE80211_TX_STAT_ACK) { | |
387 | if (frag == 0) { | |
388 | local->dot11TransmittedFrameCount++; | |
389 | if (is_multicast_ether_addr(hdr->addr1)) | |
390 | local->dot11MulticastTransmittedFrameCount++; | |
391 | if (retry_count > 0) | |
392 | local->dot11RetryCount++; | |
393 | if (retry_count > 1) | |
394 | local->dot11MultipleRetryCount++; | |
395 | } | |
396 | ||
397 | /* This counter shall be incremented for an acknowledged MPDU | |
398 | * with an individual address in the address 1 field or an MPDU | |
399 | * with a multicast address in the address 1 field of type Data | |
400 | * or Management. */ | |
401 | if (!is_multicast_ether_addr(hdr->addr1) || | |
402 | type == IEEE80211_FTYPE_DATA || | |
403 | type == IEEE80211_FTYPE_MGMT) | |
404 | local->dot11TransmittedFragmentCount++; | |
405 | } else { | |
406 | if (frag == 0) | |
407 | local->dot11FailedCount++; | |
408 | } | |
409 | ||
375177bf VN |
410 | if (ieee80211_is_nullfunc(fc) && ieee80211_has_pm(fc) && |
411 | (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) && | |
412 | !(info->flags & IEEE80211_TX_CTL_INJECTED) && | |
413 | local->ps_sdata && !(local->scanning)) { | |
414 | if (info->flags & IEEE80211_TX_STAT_ACK) { | |
415 | local->ps_sdata->u.mgd.flags |= | |
416 | IEEE80211_STA_NULLFUNC_ACKED; | |
375177bf VN |
417 | } else |
418 | mod_timer(&local->dynamic_ps_timer, jiffies + | |
419 | msecs_to_jiffies(10)); | |
420 | } | |
421 | ||
f30221e4 JB |
422 | if (info->flags & IEEE80211_TX_INTFL_NL80211_FRAME_TX) { |
423 | struct ieee80211_work *wk; | |
4334ec85 | 424 | u64 cookie = (unsigned long)skb; |
f30221e4 JB |
425 | |
426 | rcu_read_lock(); | |
427 | list_for_each_entry_rcu(wk, &local->work_list, list) { | |
428 | if (wk->type != IEEE80211_WORK_OFFCHANNEL_TX) | |
429 | continue; | |
430 | if (wk->offchan_tx.frame != skb) | |
431 | continue; | |
432 | wk->offchan_tx.frame = NULL; | |
433 | break; | |
434 | } | |
435 | rcu_read_unlock(); | |
4334ec85 JB |
436 | if (local->hw_roc_skb_for_status == skb) { |
437 | cookie = local->hw_roc_cookie ^ 2; | |
438 | local->hw_roc_skb_for_status = NULL; | |
439 | } | |
5f16a436 | 440 | |
2e161f78 | 441 | cfg80211_mgmt_tx_status( |
4334ec85 | 442 | skb->dev, cookie, skb->data, skb->len, |
026331c4 | 443 | !!(info->flags & IEEE80211_TX_STAT_ACK), GFP_ATOMIC); |
f30221e4 | 444 | } |
026331c4 | 445 | |
fe7a5d5c JB |
446 | /* this was a transmitted frame, but now we want to reuse it */ |
447 | skb_orphan(skb); | |
448 | ||
eaf55530 FF |
449 | /* Need to make a copy before skb->cb gets cleared */ |
450 | send_to_cooked = !!(info->flags & IEEE80211_TX_CTL_INJECTED) || | |
451 | (type != IEEE80211_FTYPE_DATA); | |
452 | ||
fe7a5d5c JB |
453 | /* |
454 | * This is a bit racy but we can avoid a lot of work | |
455 | * with this test... | |
456 | */ | |
eaf55530 | 457 | if (!local->monitors && (!send_to_cooked || !local->cooked_mntrs)) { |
fe7a5d5c JB |
458 | dev_kfree_skb(skb); |
459 | return; | |
460 | } | |
461 | ||
462 | /* send frame to monitor interfaces now */ | |
463 | ||
464 | if (skb_headroom(skb) < sizeof(*rthdr)) { | |
465 | printk(KERN_ERR "ieee80211_tx_status: headroom too small\n"); | |
466 | dev_kfree_skb(skb); | |
467 | return; | |
468 | } | |
469 | ||
470 | rthdr = (struct ieee80211_tx_status_rtap_hdr *) | |
471 | skb_push(skb, sizeof(*rthdr)); | |
472 | ||
473 | memset(rthdr, 0, sizeof(*rthdr)); | |
474 | rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr)); | |
475 | rthdr->hdr.it_present = | |
476 | cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) | | |
477 | (1 << IEEE80211_RADIOTAP_DATA_RETRIES) | | |
478 | (1 << IEEE80211_RADIOTAP_RATE)); | |
479 | ||
480 | if (!(info->flags & IEEE80211_TX_STAT_ACK) && | |
481 | !is_multicast_ether_addr(hdr->addr1)) | |
482 | rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL); | |
483 | ||
484 | /* | |
485 | * XXX: Once radiotap gets the bitmap reset thing the vendor | |
486 | * extensions proposal contains, we can actually report | |
487 | * the whole set of tries we did. | |
488 | */ | |
489 | if ((info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) || | |
490 | (info->status.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)) | |
491 | rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS); | |
492 | else if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) | |
493 | rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS); | |
494 | if (info->status.rates[0].idx >= 0 && | |
495 | !(info->status.rates[0].flags & IEEE80211_TX_RC_MCS)) | |
496 | rthdr->rate = sband->bitrates[ | |
497 | info->status.rates[0].idx].bitrate / 5; | |
498 | ||
499 | /* for now report the total retry_count */ | |
500 | rthdr->data_retries = retry_count; | |
501 | ||
502 | /* XXX: is this sufficient for BPF? */ | |
503 | skb_set_mac_header(skb, 0); | |
504 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
505 | skb->pkt_type = PACKET_OTHERHOST; | |
506 | skb->protocol = htons(ETH_P_802_2); | |
507 | memset(skb->cb, 0, sizeof(skb->cb)); | |
508 | ||
509 | rcu_read_lock(); | |
510 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
511 | if (sdata->vif.type == NL80211_IFTYPE_MONITOR) { | |
9607e6b6 | 512 | if (!ieee80211_sdata_running(sdata)) |
fe7a5d5c JB |
513 | continue; |
514 | ||
515 | if ((sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) && | |
eaf55530 | 516 | !send_to_cooked) |
fe7a5d5c JB |
517 | continue; |
518 | ||
519 | if (prev_dev) { | |
520 | skb2 = skb_clone(skb, GFP_ATOMIC); | |
521 | if (skb2) { | |
522 | skb2->dev = prev_dev; | |
4efe7f51 | 523 | netif_rx(skb2); |
fe7a5d5c JB |
524 | } |
525 | } | |
526 | ||
527 | prev_dev = sdata->dev; | |
528 | } | |
529 | } | |
530 | if (prev_dev) { | |
531 | skb->dev = prev_dev; | |
4efe7f51 | 532 | netif_rx(skb); |
fe7a5d5c JB |
533 | skb = NULL; |
534 | } | |
535 | rcu_read_unlock(); | |
536 | dev_kfree_skb(skb); | |
537 | } | |
538 | EXPORT_SYMBOL(ieee80211_tx_status); | |
8178d38b AN |
539 | |
540 | void ieee80211_report_low_ack(struct ieee80211_sta *pubsta, u32 num_packets) | |
541 | { | |
542 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
543 | cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr, | |
544 | num_packets, GFP_ATOMIC); | |
545 | } | |
546 | EXPORT_SYMBOL(ieee80211_report_low_ack); |