Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2002-2005, Instant802 Networks, Inc. |
| 3 | * Copyright 2005-2006, Devicescape Software, Inc. |
| 4 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> |
Jouni Malinen | 026331c | 2010-02-15 12:53:10 +0200 | [diff] [blame] | 5 | * Copyright 2008-2010 Johannes Berg <johannes@sipsolutions.net> |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 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" |
| 17 | |
| 18 | |
| 19 | void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, |
| 20 | struct sk_buff *skb) |
| 21 | { |
| 22 | struct ieee80211_local *local = hw_to_local(hw); |
| 23 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| 24 | int tmp; |
| 25 | |
| 26 | skb->pkt_type = IEEE80211_TX_STATUS_MSG; |
| 27 | skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ? |
| 28 | &local->skb_queue : &local->skb_queue_unreliable, skb); |
| 29 | tmp = skb_queue_len(&local->skb_queue) + |
| 30 | skb_queue_len(&local->skb_queue_unreliable); |
| 31 | while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT && |
| 32 | (skb = skb_dequeue(&local->skb_queue_unreliable))) { |
| 33 | dev_kfree_skb_irq(skb); |
| 34 | tmp--; |
| 35 | I802_DEBUG_INC(local->tx_status_drop); |
| 36 | } |
| 37 | tasklet_schedule(&local->tasklet); |
| 38 | } |
| 39 | EXPORT_SYMBOL(ieee80211_tx_status_irqsafe); |
| 40 | |
| 41 | static void ieee80211_handle_filtered_frame(struct ieee80211_local *local, |
| 42 | struct sta_info *sta, |
| 43 | struct sk_buff *skb) |
| 44 | { |
| 45 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| 46 | |
| 47 | /* |
Johannes Berg | 697e6a0 | 2010-01-17 01:47:56 +0100 | [diff] [blame] | 48 | * This skb 'survived' a round-trip through the driver, and |
| 49 | * hopefully the driver didn't mangle it too badly. However, |
Walter Goldens | 77c2061 | 2010-05-18 04:44:54 -0700 | [diff] [blame] | 50 | * we can definitely not rely on the control information |
Johannes Berg | c6fcf6b | 2010-01-17 01:47:59 +0100 | [diff] [blame] | 51 | * being correct. Clear it so we don't get junk there, and |
| 52 | * indicate that it needs new processing, but must not be |
| 53 | * modified/encrypted again. |
Johannes Berg | 697e6a0 | 2010-01-17 01:47:56 +0100 | [diff] [blame] | 54 | */ |
| 55 | memset(&info->control, 0, sizeof(info->control)); |
Johannes Berg | 18c9490 | 2010-01-25 19:07:39 +0100 | [diff] [blame] | 56 | |
| 57 | info->control.jiffies = jiffies; |
| 58 | info->control.vif = &sta->sdata->vif; |
Johannes Berg | c6fcf6b | 2010-01-17 01:47:59 +0100 | [diff] [blame] | 59 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING | |
| 60 | IEEE80211_TX_INTFL_RETRANSMISSION; |
Christian Lamparter | eb7d306 | 2010-09-21 21:36:18 +0200 | [diff] [blame] | 61 | info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS; |
Johannes Berg | 697e6a0 | 2010-01-17 01:47:56 +0100 | [diff] [blame] | 62 | |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 63 | sta->tx_filtered_count++; |
| 64 | |
| 65 | /* |
| 66 | * Clear the TX filter mask for this STA when sending the next |
| 67 | * packet. If the STA went to power save mode, this will happen |
| 68 | * when it wakes up for the next time. |
| 69 | */ |
| 70 | set_sta_flags(sta, WLAN_STA_CLEAR_PS_FILT); |
| 71 | |
| 72 | /* |
| 73 | * This code races in the following way: |
| 74 | * |
| 75 | * (1) STA sends frame indicating it will go to sleep and does so |
| 76 | * (2) hardware/firmware adds STA to filter list, passes frame up |
| 77 | * (3) hardware/firmware processes TX fifo and suppresses a frame |
| 78 | * (4) we get TX status before having processed the frame and |
| 79 | * knowing that the STA has gone to sleep. |
| 80 | * |
| 81 | * This is actually quite unlikely even when both those events are |
| 82 | * processed from interrupts coming in quickly after one another or |
| 83 | * even at the same time because we queue both TX status events and |
| 84 | * RX frames to be processed by a tasklet and process them in the |
| 85 | * same order that they were received or TX status last. Hence, there |
| 86 | * is no race as long as the frame RX is processed before the next TX |
| 87 | * status, which drivers can ensure, see below. |
| 88 | * |
| 89 | * Note that this can only happen if the hardware or firmware can |
| 90 | * actually add STAs to the filter list, if this is done by the |
| 91 | * driver in response to set_tim() (which will only reduce the race |
| 92 | * this whole filtering tries to solve, not completely solve it) |
| 93 | * this situation cannot happen. |
| 94 | * |
| 95 | * To completely solve this race drivers need to make sure that they |
| 96 | * (a) don't mix the irq-safe/not irq-safe TX status/RX processing |
| 97 | * functions and |
| 98 | * (b) always process RX events before TX status events if ordering |
| 99 | * can be unknown, for example with different interrupt status |
| 100 | * bits. |
Arik Nemtsov | d057e5a | 2011-01-31 22:29:13 +0200 | [diff] [blame] | 101 | * (c) if PS mode transitions are manual (i.e. the flag |
| 102 | * %IEEE80211_HW_AP_LINK_PS is set), always process PS state |
| 103 | * changes before calling TX status events if ordering can be |
| 104 | * unknown. |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 105 | */ |
| 106 | if (test_sta_flags(sta, WLAN_STA_PS_STA) && |
| 107 | skb_queue_len(&sta->tx_filtered) < STA_MAX_TX_BUFFER) { |
| 108 | skb_queue_tail(&sta->tx_filtered, skb); |
| 109 | return; |
| 110 | } |
| 111 | |
| 112 | if (!test_sta_flags(sta, WLAN_STA_PS_STA) && |
| 113 | !(info->flags & IEEE80211_TX_INTFL_RETRIED)) { |
| 114 | /* Software retry the packet once */ |
| 115 | info->flags |= IEEE80211_TX_INTFL_RETRIED; |
| 116 | ieee80211_add_pending_skb(local, skb); |
| 117 | return; |
| 118 | } |
| 119 | |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 120 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
| 121 | if (net_ratelimit()) |
Joe Perches | 0fb9a9e | 2010-08-20 16:25:38 -0700 | [diff] [blame] | 122 | wiphy_debug(local->hw.wiphy, |
| 123 | "dropped TX filtered frame, queue_len=%d PS=%d @%lu\n", |
| 124 | skb_queue_len(&sta->tx_filtered), |
| 125 | !!test_sta_flags(sta, WLAN_STA_PS_STA), jiffies); |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 126 | #endif |
| 127 | dev_kfree_skb(skb); |
| 128 | } |
| 129 | |
Felix Fietkau | f0425be | 2011-08-28 21:11:01 +0200 | [diff] [blame^] | 130 | static void ieee80211_check_pending_bar(struct sta_info *sta, u8 *addr, u8 tid) |
| 131 | { |
| 132 | struct tid_ampdu_tx *tid_tx; |
| 133 | |
| 134 | tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); |
| 135 | if (!tid_tx || !tid_tx->bar_pending) |
| 136 | return; |
| 137 | |
| 138 | tid_tx->bar_pending = false; |
| 139 | ieee80211_send_bar(sta->sdata, addr, tid, tid_tx->failed_bar_ssn); |
| 140 | } |
| 141 | |
Johannes Berg | 0f78231 | 2009-12-01 13:37:02 +0100 | [diff] [blame] | 142 | static void ieee80211_frame_acked(struct sta_info *sta, struct sk_buff *skb) |
| 143 | { |
| 144 | struct ieee80211_mgmt *mgmt = (void *) skb->data; |
| 145 | struct ieee80211_local *local = sta->local; |
| 146 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
| 147 | |
Felix Fietkau | f0425be | 2011-08-28 21:11:01 +0200 | [diff] [blame^] | 148 | if (ieee80211_is_data_qos(mgmt->frame_control)) { |
| 149 | struct ieee80211_hdr *hdr = (void *) skb->data; |
| 150 | u8 *qc = ieee80211_get_qos_ctl(hdr); |
| 151 | u16 tid = qc[0] & 0xf; |
| 152 | |
| 153 | ieee80211_check_pending_bar(sta, hdr->addr1, tid); |
| 154 | } |
| 155 | |
Johannes Berg | 0f78231 | 2009-12-01 13:37:02 +0100 | [diff] [blame] | 156 | if (ieee80211_is_action(mgmt->frame_control) && |
| 157 | sdata->vif.type == NL80211_IFTYPE_STATION && |
| 158 | mgmt->u.action.category == WLAN_CATEGORY_HT && |
| 159 | mgmt->u.action.u.ht_smps.action == WLAN_HT_ACTION_SMPS) { |
| 160 | /* |
| 161 | * This update looks racy, but isn't -- if we come |
| 162 | * here we've definitely got a station that we're |
| 163 | * talking to, and on a managed interface that can |
| 164 | * only be the AP. And the only other place updating |
| 165 | * this variable is before we're associated. |
| 166 | */ |
| 167 | switch (mgmt->u.action.u.ht_smps.smps_control) { |
| 168 | case WLAN_HT_SMPS_CONTROL_DYNAMIC: |
| 169 | sta->sdata->u.mgd.ap_smps = IEEE80211_SMPS_DYNAMIC; |
| 170 | break; |
| 171 | case WLAN_HT_SMPS_CONTROL_STATIC: |
| 172 | sta->sdata->u.mgd.ap_smps = IEEE80211_SMPS_STATIC; |
| 173 | break; |
| 174 | case WLAN_HT_SMPS_CONTROL_DISABLED: |
| 175 | default: /* shouldn't happen since we don't send that */ |
| 176 | sta->sdata->u.mgd.ap_smps = IEEE80211_SMPS_OFF; |
| 177 | break; |
| 178 | } |
| 179 | |
| 180 | ieee80211_queue_work(&local->hw, &local->recalc_smps); |
| 181 | } |
| 182 | } |
| 183 | |
Felix Fietkau | f0425be | 2011-08-28 21:11:01 +0200 | [diff] [blame^] | 184 | static void ieee80211_set_bar_pending(struct sta_info *sta, u8 tid, u16 ssn) |
| 185 | { |
| 186 | struct tid_ampdu_tx *tid_tx; |
| 187 | |
| 188 | tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); |
| 189 | if (!tid_tx) |
| 190 | return; |
| 191 | |
| 192 | tid_tx->failed_bar_ssn = ssn; |
| 193 | tid_tx->bar_pending = true; |
| 194 | } |
| 195 | |
Johannes Berg | 99ba2a1 | 2010-11-24 08:10:06 +0100 | [diff] [blame] | 196 | /* |
| 197 | * Use a static threshold for now, best value to be determined |
| 198 | * by testing ... |
| 199 | * Should it depend on: |
| 200 | * - on # of retransmissions |
| 201 | * - current throughput (higher value for higher tpt)? |
| 202 | */ |
| 203 | #define STA_LOST_PKT_THRESHOLD 50 |
| 204 | |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 205 | void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb) |
| 206 | { |
| 207 | struct sk_buff *skb2; |
| 208 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
| 209 | struct ieee80211_local *local = hw_to_local(hw); |
| 210 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| 211 | u16 frag, type; |
| 212 | __le16 fc; |
| 213 | struct ieee80211_supported_band *sband; |
| 214 | struct ieee80211_tx_status_rtap_hdr *rthdr; |
| 215 | struct ieee80211_sub_if_data *sdata; |
| 216 | struct net_device *prev_dev = NULL; |
Johannes Berg | abe6063 | 2009-11-25 17:46:18 +0100 | [diff] [blame] | 217 | struct sta_info *sta, *tmp; |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 218 | int retry_count = -1, i; |
Juuso Oikarinen | 0c86980 | 2010-04-22 10:27:48 +0300 | [diff] [blame] | 219 | int rates_idx = -1; |
Felix Fietkau | eaf5553 | 2010-03-11 16:28:24 +0100 | [diff] [blame] | 220 | bool send_to_cooked; |
Felix Fietkau | 04ac3c0 | 2010-12-02 21:01:08 +0100 | [diff] [blame] | 221 | bool acked; |
Helmut Schaa | e69dede | 2011-08-11 16:17:42 +0200 | [diff] [blame] | 222 | struct ieee80211_bar *bar; |
| 223 | u16 tid; |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 224 | |
| 225 | for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) { |
Helmut Schaa | be7974a | 2011-03-21 15:07:55 +0100 | [diff] [blame] | 226 | if (info->status.rates[i].idx < 0) { |
| 227 | break; |
| 228 | } else if (i >= hw->max_report_rates) { |
| 229 | /* the HW cannot have attempted that rate */ |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 230 | info->status.rates[i].idx = -1; |
| 231 | info->status.rates[i].count = 0; |
Helmut Schaa | be7974a | 2011-03-21 15:07:55 +0100 | [diff] [blame] | 232 | break; |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 233 | } |
| 234 | |
| 235 | retry_count += info->status.rates[i].count; |
| 236 | } |
Helmut Schaa | be7974a | 2011-03-21 15:07:55 +0100 | [diff] [blame] | 237 | rates_idx = i - 1; |
| 238 | |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 239 | if (retry_count < 0) |
| 240 | retry_count = 0; |
| 241 | |
| 242 | rcu_read_lock(); |
| 243 | |
| 244 | sband = local->hw.wiphy->bands[info->band]; |
Vivek Natarajan | 375177b | 2010-02-09 14:50:28 +0530 | [diff] [blame] | 245 | fc = hdr->frame_control; |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 246 | |
Johannes Berg | abe6063 | 2009-11-25 17:46:18 +0100 | [diff] [blame] | 247 | for_each_sta_info(local, hdr->addr1, sta, tmp) { |
| 248 | /* skip wrong virtual interface */ |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 249 | if (memcmp(hdr->addr2, sta->sdata->vif.addr, ETH_ALEN)) |
Johannes Berg | abe6063 | 2009-11-25 17:46:18 +0100 | [diff] [blame] | 250 | continue; |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 251 | |
Felix Fietkau | 04ac3c0 | 2010-12-02 21:01:08 +0100 | [diff] [blame] | 252 | acked = !!(info->flags & IEEE80211_TX_STAT_ACK); |
| 253 | if (!acked && test_sta_flags(sta, WLAN_STA_PS_STA)) { |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 254 | /* |
| 255 | * The STA is in power save mode, so assume |
| 256 | * that this TX packet failed because of that. |
| 257 | */ |
| 258 | ieee80211_handle_filtered_frame(local, sta, skb); |
| 259 | rcu_read_unlock(); |
| 260 | return; |
| 261 | } |
| 262 | |
Juuso Oikarinen | 0c86980 | 2010-04-22 10:27:48 +0300 | [diff] [blame] | 263 | if ((local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL) && |
| 264 | (rates_idx != -1)) |
| 265 | sta->last_tx_rate = info->status.rates[rates_idx]; |
| 266 | |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 267 | if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) && |
| 268 | (ieee80211_is_data_qos(fc))) { |
| 269 | u16 tid, ssn; |
| 270 | u8 *qc; |
| 271 | |
| 272 | qc = ieee80211_get_qos_ctl(hdr); |
| 273 | tid = qc[0] & 0xf; |
| 274 | ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10) |
| 275 | & IEEE80211_SCTL_SEQ); |
| 276 | ieee80211_send_bar(sta->sdata, hdr->addr1, |
| 277 | tid, ssn); |
| 278 | } |
| 279 | |
Helmut Schaa | e69dede | 2011-08-11 16:17:42 +0200 | [diff] [blame] | 280 | if (!acked && ieee80211_is_back_req(fc)) { |
| 281 | /* |
| 282 | * BAR failed, let's tear down the BA session as a |
| 283 | * last resort as some STAs (Intel 5100 on Windows) |
| 284 | * can get stuck when the BA window isn't flushed |
| 285 | * correctly. |
| 286 | */ |
| 287 | bar = (struct ieee80211_bar *) skb->data; |
| 288 | if (!(bar->control & IEEE80211_BAR_CTRL_MULTI_TID)) { |
Felix Fietkau | f0425be | 2011-08-28 21:11:01 +0200 | [diff] [blame^] | 289 | u16 ssn = le16_to_cpu(bar->start_seq_num); |
| 290 | |
Helmut Schaa | e69dede | 2011-08-11 16:17:42 +0200 | [diff] [blame] | 291 | tid = (bar->control & |
| 292 | IEEE80211_BAR_CTRL_TID_INFO_MASK) >> |
| 293 | IEEE80211_BAR_CTRL_TID_INFO_SHIFT; |
Felix Fietkau | f0425be | 2011-08-28 21:11:01 +0200 | [diff] [blame^] | 294 | |
| 295 | ieee80211_set_bar_pending(sta, tid, ssn); |
Helmut Schaa | e69dede | 2011-08-11 16:17:42 +0200 | [diff] [blame] | 296 | } |
| 297 | } |
| 298 | |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 299 | if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) { |
| 300 | ieee80211_handle_filtered_frame(local, sta, skb); |
| 301 | rcu_read_unlock(); |
| 302 | return; |
| 303 | } else { |
Felix Fietkau | 04ac3c0 | 2010-12-02 21:01:08 +0100 | [diff] [blame] | 304 | if (!acked) |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 305 | sta->tx_retry_failed++; |
| 306 | sta->tx_retry_count += retry_count; |
| 307 | } |
| 308 | |
| 309 | rate_control_tx_status(local, sband, sta, skb); |
| 310 | if (ieee80211_vif_is_mesh(&sta->sdata->vif)) |
| 311 | ieee80211s_update_metric(local, sta, skb); |
Johannes Berg | 0f78231 | 2009-12-01 13:37:02 +0100 | [diff] [blame] | 312 | |
Felix Fietkau | 04ac3c0 | 2010-12-02 21:01:08 +0100 | [diff] [blame] | 313 | if (!(info->flags & IEEE80211_TX_CTL_INJECTED) && acked) |
Johannes Berg | 0f78231 | 2009-12-01 13:37:02 +0100 | [diff] [blame] | 314 | ieee80211_frame_acked(sta, skb); |
Johannes Berg | 99ba2a1 | 2010-11-24 08:10:06 +0100 | [diff] [blame] | 315 | |
Felix Fietkau | 04ac3c0 | 2010-12-02 21:01:08 +0100 | [diff] [blame] | 316 | if ((sta->sdata->vif.type == NL80211_IFTYPE_STATION) && |
| 317 | (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) |
| 318 | ieee80211_sta_tx_notify(sta->sdata, (void *) skb->data, acked); |
| 319 | |
Johannes Berg | 99ba2a1 | 2010-11-24 08:10:06 +0100 | [diff] [blame] | 320 | if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) { |
| 321 | if (info->flags & IEEE80211_TX_STAT_ACK) { |
| 322 | if (sta->lost_packets) |
| 323 | sta->lost_packets = 0; |
| 324 | } else if (++sta->lost_packets >= STA_LOST_PKT_THRESHOLD) { |
| 325 | cfg80211_cqm_pktloss_notify(sta->sdata->dev, |
| 326 | sta->sta.addr, |
| 327 | sta->lost_packets, |
| 328 | GFP_ATOMIC); |
| 329 | sta->lost_packets = 0; |
| 330 | } |
| 331 | } |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 332 | } |
| 333 | |
| 334 | rcu_read_unlock(); |
| 335 | |
| 336 | ieee80211_led_tx(local, 0); |
| 337 | |
| 338 | /* SNMP counters |
| 339 | * Fragments are passed to low-level drivers as separate skbs, so these |
| 340 | * are actually fragments, not frames. Update frame counters only for |
| 341 | * the first fragment of the frame. */ |
| 342 | |
| 343 | frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG; |
| 344 | type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE; |
| 345 | |
| 346 | if (info->flags & IEEE80211_TX_STAT_ACK) { |
| 347 | if (frag == 0) { |
| 348 | local->dot11TransmittedFrameCount++; |
| 349 | if (is_multicast_ether_addr(hdr->addr1)) |
| 350 | local->dot11MulticastTransmittedFrameCount++; |
| 351 | if (retry_count > 0) |
| 352 | local->dot11RetryCount++; |
| 353 | if (retry_count > 1) |
| 354 | local->dot11MultipleRetryCount++; |
| 355 | } |
| 356 | |
| 357 | /* This counter shall be incremented for an acknowledged MPDU |
| 358 | * with an individual address in the address 1 field or an MPDU |
| 359 | * with a multicast address in the address 1 field of type Data |
| 360 | * or Management. */ |
| 361 | if (!is_multicast_ether_addr(hdr->addr1) || |
| 362 | type == IEEE80211_FTYPE_DATA || |
| 363 | type == IEEE80211_FTYPE_MGMT) |
| 364 | local->dot11TransmittedFragmentCount++; |
| 365 | } else { |
| 366 | if (frag == 0) |
| 367 | local->dot11FailedCount++; |
| 368 | } |
| 369 | |
Vivek Natarajan | 375177b | 2010-02-09 14:50:28 +0530 | [diff] [blame] | 370 | if (ieee80211_is_nullfunc(fc) && ieee80211_has_pm(fc) && |
| 371 | (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) && |
| 372 | !(info->flags & IEEE80211_TX_CTL_INJECTED) && |
| 373 | local->ps_sdata && !(local->scanning)) { |
| 374 | if (info->flags & IEEE80211_TX_STAT_ACK) { |
| 375 | local->ps_sdata->u.mgd.flags |= |
| 376 | IEEE80211_STA_NULLFUNC_ACKED; |
Vivek Natarajan | 375177b | 2010-02-09 14:50:28 +0530 | [diff] [blame] | 377 | } else |
| 378 | mod_timer(&local->dynamic_ps_timer, jiffies + |
| 379 | msecs_to_jiffies(10)); |
| 380 | } |
| 381 | |
Johannes Berg | f30221e | 2010-11-25 10:02:30 +0100 | [diff] [blame] | 382 | if (info->flags & IEEE80211_TX_INTFL_NL80211_FRAME_TX) { |
| 383 | struct ieee80211_work *wk; |
Johannes Berg | 4334ec8 | 2011-02-02 16:58:06 +0100 | [diff] [blame] | 384 | u64 cookie = (unsigned long)skb; |
Johannes Berg | f30221e | 2010-11-25 10:02:30 +0100 | [diff] [blame] | 385 | |
| 386 | rcu_read_lock(); |
| 387 | list_for_each_entry_rcu(wk, &local->work_list, list) { |
| 388 | if (wk->type != IEEE80211_WORK_OFFCHANNEL_TX) |
| 389 | continue; |
| 390 | if (wk->offchan_tx.frame != skb) |
| 391 | continue; |
| 392 | wk->offchan_tx.frame = NULL; |
| 393 | break; |
| 394 | } |
| 395 | rcu_read_unlock(); |
Johannes Berg | 4334ec8 | 2011-02-02 16:58:06 +0100 | [diff] [blame] | 396 | if (local->hw_roc_skb_for_status == skb) { |
| 397 | cookie = local->hw_roc_cookie ^ 2; |
| 398 | local->hw_roc_skb_for_status = NULL; |
| 399 | } |
Johannes Berg | 5f16a43 | 2011-02-25 15:36:57 +0100 | [diff] [blame] | 400 | |
Johannes Berg | 2e161f7 | 2010-08-12 15:38:38 +0200 | [diff] [blame] | 401 | cfg80211_mgmt_tx_status( |
Johannes Berg | 4334ec8 | 2011-02-02 16:58:06 +0100 | [diff] [blame] | 402 | skb->dev, cookie, skb->data, skb->len, |
Jouni Malinen | 026331c | 2010-02-15 12:53:10 +0200 | [diff] [blame] | 403 | !!(info->flags & IEEE80211_TX_STAT_ACK), GFP_ATOMIC); |
Johannes Berg | f30221e | 2010-11-25 10:02:30 +0100 | [diff] [blame] | 404 | } |
Jouni Malinen | 026331c | 2010-02-15 12:53:10 +0200 | [diff] [blame] | 405 | |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 406 | /* this was a transmitted frame, but now we want to reuse it */ |
| 407 | skb_orphan(skb); |
| 408 | |
Felix Fietkau | eaf5553 | 2010-03-11 16:28:24 +0100 | [diff] [blame] | 409 | /* Need to make a copy before skb->cb gets cleared */ |
| 410 | send_to_cooked = !!(info->flags & IEEE80211_TX_CTL_INJECTED) || |
| 411 | (type != IEEE80211_FTYPE_DATA); |
| 412 | |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 413 | /* |
| 414 | * This is a bit racy but we can avoid a lot of work |
| 415 | * with this test... |
| 416 | */ |
Felix Fietkau | eaf5553 | 2010-03-11 16:28:24 +0100 | [diff] [blame] | 417 | if (!local->monitors && (!send_to_cooked || !local->cooked_mntrs)) { |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 418 | dev_kfree_skb(skb); |
| 419 | return; |
| 420 | } |
| 421 | |
| 422 | /* send frame to monitor interfaces now */ |
| 423 | |
| 424 | if (skb_headroom(skb) < sizeof(*rthdr)) { |
| 425 | printk(KERN_ERR "ieee80211_tx_status: headroom too small\n"); |
| 426 | dev_kfree_skb(skb); |
| 427 | return; |
| 428 | } |
| 429 | |
| 430 | rthdr = (struct ieee80211_tx_status_rtap_hdr *) |
| 431 | skb_push(skb, sizeof(*rthdr)); |
| 432 | |
| 433 | memset(rthdr, 0, sizeof(*rthdr)); |
| 434 | rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr)); |
| 435 | rthdr->hdr.it_present = |
| 436 | cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) | |
| 437 | (1 << IEEE80211_RADIOTAP_DATA_RETRIES) | |
| 438 | (1 << IEEE80211_RADIOTAP_RATE)); |
| 439 | |
| 440 | if (!(info->flags & IEEE80211_TX_STAT_ACK) && |
| 441 | !is_multicast_ether_addr(hdr->addr1)) |
| 442 | rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL); |
| 443 | |
| 444 | /* |
| 445 | * XXX: Once radiotap gets the bitmap reset thing the vendor |
| 446 | * extensions proposal contains, we can actually report |
| 447 | * the whole set of tries we did. |
| 448 | */ |
| 449 | if ((info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) || |
| 450 | (info->status.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)) |
| 451 | rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS); |
| 452 | else if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) |
| 453 | rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS); |
| 454 | if (info->status.rates[0].idx >= 0 && |
| 455 | !(info->status.rates[0].flags & IEEE80211_TX_RC_MCS)) |
| 456 | rthdr->rate = sband->bitrates[ |
| 457 | info->status.rates[0].idx].bitrate / 5; |
| 458 | |
| 459 | /* for now report the total retry_count */ |
| 460 | rthdr->data_retries = retry_count; |
| 461 | |
| 462 | /* XXX: is this sufficient for BPF? */ |
| 463 | skb_set_mac_header(skb, 0); |
| 464 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
| 465 | skb->pkt_type = PACKET_OTHERHOST; |
| 466 | skb->protocol = htons(ETH_P_802_2); |
| 467 | memset(skb->cb, 0, sizeof(skb->cb)); |
| 468 | |
| 469 | rcu_read_lock(); |
| 470 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
| 471 | if (sdata->vif.type == NL80211_IFTYPE_MONITOR) { |
Johannes Berg | 9607e6b | 2009-12-23 13:15:31 +0100 | [diff] [blame] | 472 | if (!ieee80211_sdata_running(sdata)) |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 473 | continue; |
| 474 | |
| 475 | if ((sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) && |
Felix Fietkau | eaf5553 | 2010-03-11 16:28:24 +0100 | [diff] [blame] | 476 | !send_to_cooked) |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 477 | continue; |
| 478 | |
| 479 | if (prev_dev) { |
| 480 | skb2 = skb_clone(skb, GFP_ATOMIC); |
| 481 | if (skb2) { |
| 482 | skb2->dev = prev_dev; |
John W. Linville | 4efe7f5 | 2010-10-07 11:35:40 -0400 | [diff] [blame] | 483 | netif_rx(skb2); |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 484 | } |
| 485 | } |
| 486 | |
| 487 | prev_dev = sdata->dev; |
| 488 | } |
| 489 | } |
| 490 | if (prev_dev) { |
| 491 | skb->dev = prev_dev; |
John W. Linville | 4efe7f5 | 2010-10-07 11:35:40 -0400 | [diff] [blame] | 492 | netif_rx(skb); |
Johannes Berg | fe7a5d5 | 2009-11-18 18:42:47 +0100 | [diff] [blame] | 493 | skb = NULL; |
| 494 | } |
| 495 | rcu_read_unlock(); |
| 496 | dev_kfree_skb(skb); |
| 497 | } |
| 498 | EXPORT_SYMBOL(ieee80211_tx_status); |
Arik Nemtsov | 8178d38 | 2011-04-18 14:22:28 +0300 | [diff] [blame] | 499 | |
| 500 | void ieee80211_report_low_ack(struct ieee80211_sta *pubsta, u32 num_packets) |
| 501 | { |
| 502 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); |
| 503 | cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr, |
| 504 | num_packets, GFP_ATOMIC); |
| 505 | } |
| 506 | EXPORT_SYMBOL(ieee80211_report_low_ack); |