| /* |
| * Copyright 2002-2005, Instant802 Networks, Inc. |
| * Copyright 2005-2006, Devicescape Software, Inc. |
| * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> |
| * Copyright 2008-2010 Johannes Berg <johannes@sipsolutions.net> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| */ |
| |
| #include <linux/export.h> |
| #include <linux/etherdevice.h> |
| #include <net/mac80211.h> |
| #include <asm/unaligned.h> |
| #include "ieee80211_i.h" |
| #include "rate.h" |
| #include "mesh.h" |
| #include "led.h" |
| #include "wme.h" |
| |
| |
| void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, |
| struct sk_buff *skb) |
| { |
| struct ieee80211_local *local = hw_to_local(hw); |
| struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| int tmp; |
| |
| skb->pkt_type = IEEE80211_TX_STATUS_MSG; |
| skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ? |
| &local->skb_queue : &local->skb_queue_unreliable, skb); |
| tmp = skb_queue_len(&local->skb_queue) + |
| skb_queue_len(&local->skb_queue_unreliable); |
| while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT && |
| (skb = skb_dequeue(&local->skb_queue_unreliable))) { |
| ieee80211_free_txskb(hw, skb); |
| tmp--; |
| I802_DEBUG_INC(local->tx_status_drop); |
| } |
| tasklet_schedule(&local->tasklet); |
| } |
| EXPORT_SYMBOL(ieee80211_tx_status_irqsafe); |
| |
| static void ieee80211_handle_filtered_frame(struct ieee80211_local *local, |
| struct sta_info *sta, |
| struct sk_buff *skb) |
| { |
| struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| struct ieee80211_hdr *hdr = (void *)skb->data; |
| int ac; |
| |
| /* |
| * This skb 'survived' a round-trip through the driver, and |
| * hopefully the driver didn't mangle it too badly. However, |
| * we can definitely not rely on the control information |
| * being correct. Clear it so we don't get junk there, and |
| * indicate that it needs new processing, but must not be |
| * modified/encrypted again. |
| */ |
| memset(&info->control, 0, sizeof(info->control)); |
| |
| info->control.jiffies = jiffies; |
| info->control.vif = &sta->sdata->vif; |
| info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING | |
| IEEE80211_TX_INTFL_RETRANSMISSION; |
| info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS; |
| |
| sta->tx_filtered_count++; |
| |
| /* |
| * Clear more-data bit on filtered frames, it might be set |
| * but later frames might time out so it might have to be |
| * clear again ... It's all rather unlikely (this frame |
| * should time out first, right?) but let's not confuse |
| * peers unnecessarily. |
| */ |
| if (hdr->frame_control & cpu_to_le16(IEEE80211_FCTL_MOREDATA)) |
| hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_MOREDATA); |
| |
| if (ieee80211_is_data_qos(hdr->frame_control)) { |
| u8 *p = ieee80211_get_qos_ctl(hdr); |
| int tid = *p & IEEE80211_QOS_CTL_TID_MASK; |
| |
| /* |
| * Clear EOSP if set, this could happen e.g. |
| * if an absence period (us being a P2P GO) |
| * shortens the SP. |
| */ |
| if (*p & IEEE80211_QOS_CTL_EOSP) |
| *p &= ~IEEE80211_QOS_CTL_EOSP; |
| ac = ieee802_1d_to_ac[tid & 7]; |
| } else { |
| ac = IEEE80211_AC_BE; |
| } |
| |
| /* |
| * Clear the TX filter mask for this STA when sending the next |
| * packet. If the STA went to power save mode, this will happen |
| * when it wakes up for the next time. |
| */ |
| set_sta_flag(sta, WLAN_STA_CLEAR_PS_FILT); |
| |
| /* |
| * This code races in the following way: |
| * |
| * (1) STA sends frame indicating it will go to sleep and does so |
| * (2) hardware/firmware adds STA to filter list, passes frame up |
| * (3) hardware/firmware processes TX fifo and suppresses a frame |
| * (4) we get TX status before having processed the frame and |
| * knowing that the STA has gone to sleep. |
| * |
| * This is actually quite unlikely even when both those events are |
| * processed from interrupts coming in quickly after one another or |
| * even at the same time because we queue both TX status events and |
| * RX frames to be processed by a tasklet and process them in the |
| * same order that they were received or TX status last. Hence, there |
| * is no race as long as the frame RX is processed before the next TX |
| * status, which drivers can ensure, see below. |
| * |
| * Note that this can only happen if the hardware or firmware can |
| * actually add STAs to the filter list, if this is done by the |
| * driver in response to set_tim() (which will only reduce the race |
| * this whole filtering tries to solve, not completely solve it) |
| * this situation cannot happen. |
| * |
| * To completely solve this race drivers need to make sure that they |
| * (a) don't mix the irq-safe/not irq-safe TX status/RX processing |
| * functions and |
| * (b) always process RX events before TX status events if ordering |
| * can be unknown, for example with different interrupt status |
| * bits. |
| * (c) if PS mode transitions are manual (i.e. the flag |
| * %IEEE80211_HW_AP_LINK_PS is set), always process PS state |
| * changes before calling TX status events if ordering can be |
| * unknown. |
| */ |
| if (test_sta_flag(sta, WLAN_STA_PS_STA) && |
| skb_queue_len(&sta->tx_filtered[ac]) < STA_MAX_TX_BUFFER) { |
| skb_queue_tail(&sta->tx_filtered[ac], skb); |
| sta_info_recalc_tim(sta); |
| |
| if (!timer_pending(&local->sta_cleanup)) |
| mod_timer(&local->sta_cleanup, |
| round_jiffies(jiffies + |
| STA_INFO_CLEANUP_INTERVAL)); |
| return; |
| } |
| |
| if (!test_sta_flag(sta, WLAN_STA_PS_STA) && |
| !(info->flags & IEEE80211_TX_INTFL_RETRIED)) { |
| /* Software retry the packet once */ |
| info->flags |= IEEE80211_TX_INTFL_RETRIED; |
| ieee80211_add_pending_skb(local, skb); |
| return; |
| } |
| |
| ps_dbg_ratelimited(sta->sdata, |
| "dropped TX filtered frame, queue_len=%d PS=%d @%lu\n", |
| skb_queue_len(&sta->tx_filtered[ac]), |
| !!test_sta_flag(sta, WLAN_STA_PS_STA), jiffies); |
| ieee80211_free_txskb(&local->hw, skb); |
| } |
| |
| static void ieee80211_check_pending_bar(struct sta_info *sta, u8 *addr, u8 tid) |
| { |
| struct tid_ampdu_tx *tid_tx; |
| |
| tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); |
| if (!tid_tx || !tid_tx->bar_pending) |
| return; |
| |
| tid_tx->bar_pending = false; |
| ieee80211_send_bar(&sta->sdata->vif, addr, tid, tid_tx->failed_bar_ssn); |
| } |
| |
| static void ieee80211_frame_acked(struct sta_info *sta, struct sk_buff *skb) |
| { |
| struct ieee80211_mgmt *mgmt = (void *) skb->data; |
| struct ieee80211_local *local = sta->local; |
| struct ieee80211_sub_if_data *sdata = sta->sdata; |
| |
| if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) |
| sta->last_rx = jiffies; |
| |
| if (ieee80211_is_data_qos(mgmt->frame_control)) { |
| struct ieee80211_hdr *hdr = (void *) skb->data; |
| u8 *qc = ieee80211_get_qos_ctl(hdr); |
| u16 tid = qc[0] & 0xf; |
| |
| ieee80211_check_pending_bar(sta, hdr->addr1, tid); |
| } |
| |
| if (ieee80211_is_action(mgmt->frame_control) && |
| mgmt->u.action.category == WLAN_CATEGORY_HT && |
| mgmt->u.action.u.ht_smps.action == WLAN_HT_ACTION_SMPS && |
| sdata->vif.type == NL80211_IFTYPE_STATION && |
| ieee80211_sdata_running(sdata)) { |
| /* |
| * This update looks racy, but isn't -- if we come |
| * here we've definitely got a station that we're |
| * talking to, and on a managed interface that can |
| * only be the AP. And the only other place updating |
| * this variable in managed mode is before association. |
| */ |
| switch (mgmt->u.action.u.ht_smps.smps_control) { |
| case WLAN_HT_SMPS_CONTROL_DYNAMIC: |
| sdata->smps_mode = IEEE80211_SMPS_DYNAMIC; |
| break; |
| case WLAN_HT_SMPS_CONTROL_STATIC: |
| sdata->smps_mode = IEEE80211_SMPS_STATIC; |
| break; |
| case WLAN_HT_SMPS_CONTROL_DISABLED: |
| default: /* shouldn't happen since we don't send that */ |
| sdata->smps_mode = IEEE80211_SMPS_OFF; |
| break; |
| } |
| |
| ieee80211_queue_work(&local->hw, &sdata->recalc_smps); |
| } |
| } |
| |
| static void ieee80211_set_bar_pending(struct sta_info *sta, u8 tid, u16 ssn) |
| { |
| struct tid_ampdu_tx *tid_tx; |
| |
| tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); |
| if (!tid_tx) |
| return; |
| |
| tid_tx->failed_bar_ssn = ssn; |
| tid_tx->bar_pending = true; |
| } |
| |
| static int ieee80211_tx_radiotap_len(struct ieee80211_tx_info *info) |
| { |
| int len = sizeof(struct ieee80211_radiotap_header); |
| |
| /* IEEE80211_RADIOTAP_RATE rate */ |
| if (info->status.rates[0].idx >= 0 && |
| !(info->status.rates[0].flags & IEEE80211_TX_RC_MCS)) |
| len += 2; |
| |
| /* IEEE80211_RADIOTAP_TX_FLAGS */ |
| len += 2; |
| |
| /* IEEE80211_RADIOTAP_DATA_RETRIES */ |
| len += 1; |
| |
| /* IEEE80211_TX_RC_MCS */ |
| if (info->status.rates[0].idx >= 0 && |
| info->status.rates[0].flags & IEEE80211_TX_RC_MCS) |
| len += 3; |
| |
| return len; |
| } |
| |
| static void ieee80211_add_tx_radiotap_header(struct ieee80211_supported_band |
| *sband, struct sk_buff *skb, |
| int retry_count, int rtap_len) |
| { |
| struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
| struct ieee80211_radiotap_header *rthdr; |
| unsigned char *pos; |
| u16 txflags; |
| |
| rthdr = (struct ieee80211_radiotap_header *) skb_push(skb, rtap_len); |
| |
| memset(rthdr, 0, rtap_len); |
| rthdr->it_len = cpu_to_le16(rtap_len); |
| rthdr->it_present = |
| cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) | |
| (1 << IEEE80211_RADIOTAP_DATA_RETRIES)); |
| pos = (unsigned char *)(rthdr + 1); |
| |
| /* |
| * XXX: Once radiotap gets the bitmap reset thing the vendor |
| * extensions proposal contains, we can actually report |
| * the whole set of tries we did. |
| */ |
| |
| /* IEEE80211_RADIOTAP_RATE */ |
| if (info->status.rates[0].idx >= 0 && |
| !(info->status.rates[0].flags & IEEE80211_TX_RC_MCS)) { |
| rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE); |
| *pos = sband->bitrates[info->status.rates[0].idx].bitrate / 5; |
| /* padding for tx flags */ |
| pos += 2; |
| } |
| |
| /* IEEE80211_RADIOTAP_TX_FLAGS */ |
| txflags = 0; |
| if (!(info->flags & IEEE80211_TX_STAT_ACK) && |
| !is_multicast_ether_addr(hdr->addr1)) |
| txflags |= IEEE80211_RADIOTAP_F_TX_FAIL; |
| |
| if ((info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) || |
| (info->status.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)) |
| txflags |= IEEE80211_RADIOTAP_F_TX_CTS; |
| else if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) |
| txflags |= IEEE80211_RADIOTAP_F_TX_RTS; |
| |
| put_unaligned_le16(txflags, pos); |
| pos += 2; |
| |
| /* IEEE80211_RADIOTAP_DATA_RETRIES */ |
| /* for now report the total retry_count */ |
| *pos = retry_count; |
| pos++; |
| |
| /* IEEE80211_TX_RC_MCS */ |
| if (info->status.rates[0].idx >= 0 && |
| info->status.rates[0].flags & IEEE80211_TX_RC_MCS) { |
| rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS); |
| pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS | |
| IEEE80211_RADIOTAP_MCS_HAVE_GI | |
| IEEE80211_RADIOTAP_MCS_HAVE_BW; |
| if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI) |
| pos[1] |= IEEE80211_RADIOTAP_MCS_SGI; |
| if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) |
| pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40; |
| if (info->status.rates[0].flags & IEEE80211_TX_RC_GREEN_FIELD) |
| pos[1] |= IEEE80211_RADIOTAP_MCS_FMT_GF; |
| pos[2] = info->status.rates[0].idx; |
| pos += 3; |
| } |
| |
| } |
| |
| static void ieee80211_report_used_skb(struct ieee80211_local *local, |
| struct sk_buff *skb, bool dropped) |
| { |
| struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| struct ieee80211_hdr *hdr = (void *)skb->data; |
| bool acked = info->flags & IEEE80211_TX_STAT_ACK; |
| |
| if (dropped) |
| acked = false; |
| |
| if (info->flags & (IEEE80211_TX_INTFL_NL80211_FRAME_TX | |
| IEEE80211_TX_INTFL_MLME_CONN_TX)) { |
| struct ieee80211_sub_if_data *sdata = NULL; |
| struct ieee80211_sub_if_data *iter_sdata; |
| u64 cookie = (unsigned long)skb; |
| |
| rcu_read_lock(); |
| |
| if (skb->dev) { |
| list_for_each_entry_rcu(iter_sdata, &local->interfaces, |
| list) { |
| if (!iter_sdata->dev) |
| continue; |
| |
| if (skb->dev == iter_sdata->dev) { |
| sdata = iter_sdata; |
| break; |
| } |
| } |
| } else { |
| sdata = rcu_dereference(local->p2p_sdata); |
| } |
| |
| if (!sdata) { |
| skb->dev = NULL; |
| } else if (info->flags & IEEE80211_TX_INTFL_MLME_CONN_TX) { |
| ieee80211_mgd_conn_tx_status(sdata, hdr->frame_control, |
| acked); |
| } else if (ieee80211_is_nullfunc(hdr->frame_control) || |
| ieee80211_is_qos_nullfunc(hdr->frame_control)) { |
| cfg80211_probe_status(sdata->dev, hdr->addr1, |
| cookie, acked, GFP_ATOMIC); |
| } else { |
| cfg80211_mgmt_tx_status(&sdata->wdev, cookie, skb->data, |
| skb->len, acked, GFP_ATOMIC); |
| } |
| |
| rcu_read_unlock(); |
| } |
| |
| if (unlikely(info->ack_frame_id)) { |
| struct sk_buff *ack_skb; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&local->ack_status_lock, flags); |
| ack_skb = idr_find(&local->ack_status_frames, |
| info->ack_frame_id); |
| if (ack_skb) |
| idr_remove(&local->ack_status_frames, |
| info->ack_frame_id); |
| spin_unlock_irqrestore(&local->ack_status_lock, flags); |
| |
| if (ack_skb) { |
| if (!dropped) { |
| /* consumes ack_skb */ |
| skb_complete_wifi_ack(ack_skb, acked); |
| } else { |
| dev_kfree_skb_any(ack_skb); |
| } |
| } |
| } |
| } |
| |
| /* |
| * Use a static threshold for now, best value to be determined |
| * by testing ... |
| * Should it depend on: |
| * - on # of retransmissions |
| * - current throughput (higher value for higher tpt)? |
| */ |
| #define STA_LOST_PKT_THRESHOLD 50 |
| |
| void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb) |
| { |
| struct sk_buff *skb2; |
| struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
| struct ieee80211_local *local = hw_to_local(hw); |
| struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| __le16 fc; |
| struct ieee80211_supported_band *sband; |
| struct ieee80211_sub_if_data *sdata; |
| struct net_device *prev_dev = NULL; |
| struct sta_info *sta, *tmp; |
| int retry_count = -1, i; |
| int rates_idx = -1; |
| bool send_to_cooked; |
| bool acked; |
| struct ieee80211_bar *bar; |
| int rtap_len; |
| |
| for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) { |
| if ((info->flags & IEEE80211_TX_CTL_AMPDU) && |
| !(info->flags & IEEE80211_TX_STAT_AMPDU)) { |
| /* just the first aggr frame carry status info */ |
| info->status.rates[i].idx = -1; |
| info->status.rates[i].count = 0; |
| break; |
| } else if (info->status.rates[i].idx < 0) { |
| break; |
| } else if (i >= hw->max_report_rates) { |
| /* the HW cannot have attempted that rate */ |
| info->status.rates[i].idx = -1; |
| info->status.rates[i].count = 0; |
| break; |
| } |
| |
| retry_count += info->status.rates[i].count; |
| } |
| rates_idx = i - 1; |
| |
| if (retry_count < 0) |
| retry_count = 0; |
| |
| rcu_read_lock(); |
| |
| sband = local->hw.wiphy->bands[info->band]; |
| fc = hdr->frame_control; |
| |
| for_each_sta_info(local, hdr->addr1, sta, tmp) { |
| /* skip wrong virtual interface */ |
| if (!ether_addr_equal(hdr->addr2, sta->sdata->vif.addr)) |
| continue; |
| |
| if (info->flags & IEEE80211_TX_STATUS_EOSP) |
| clear_sta_flag(sta, WLAN_STA_SP); |
| |
| acked = !!(info->flags & IEEE80211_TX_STAT_ACK); |
| if (!acked && test_sta_flag(sta, WLAN_STA_PS_STA)) { |
| /* |
| * The STA is in power save mode, so assume |
| * that this TX packet failed because of that. |
| */ |
| ieee80211_handle_filtered_frame(local, sta, skb); |
| rcu_read_unlock(); |
| return; |
| } |
| |
| /* mesh Peer Service Period support */ |
| if (ieee80211_vif_is_mesh(&sta->sdata->vif) && |
| ieee80211_is_data_qos(fc)) |
| ieee80211_mpsp_trigger_process( |
| ieee80211_get_qos_ctl(hdr), |
| sta, true, acked); |
| |
| if ((local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL) && |
| (rates_idx != -1)) |
| sta->last_tx_rate = info->status.rates[rates_idx]; |
| |
| if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) && |
| (ieee80211_is_data_qos(fc))) { |
| u16 tid, ssn; |
| u8 *qc; |
| |
| qc = ieee80211_get_qos_ctl(hdr); |
| tid = qc[0] & 0xf; |
| ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10) |
| & IEEE80211_SCTL_SEQ); |
| ieee80211_send_bar(&sta->sdata->vif, hdr->addr1, |
| tid, ssn); |
| } |
| |
| if (!acked && ieee80211_is_back_req(fc)) { |
| u16 tid, control; |
| |
| /* |
| * BAR failed, store the last SSN and retry sending |
| * the BAR when the next unicast transmission on the |
| * same TID succeeds. |
| */ |
| bar = (struct ieee80211_bar *) skb->data; |
| control = le16_to_cpu(bar->control); |
| if (!(control & IEEE80211_BAR_CTRL_MULTI_TID)) { |
| u16 ssn = le16_to_cpu(bar->start_seq_num); |
| |
| tid = (control & |
| IEEE80211_BAR_CTRL_TID_INFO_MASK) >> |
| IEEE80211_BAR_CTRL_TID_INFO_SHIFT; |
| |
| ieee80211_set_bar_pending(sta, tid, ssn); |
| } |
| } |
| |
| if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) { |
| ieee80211_handle_filtered_frame(local, sta, skb); |
| rcu_read_unlock(); |
| return; |
| } else { |
| if (!acked) |
| sta->tx_retry_failed++; |
| sta->tx_retry_count += retry_count; |
| } |
| |
| rate_control_tx_status(local, sband, sta, skb); |
| if (ieee80211_vif_is_mesh(&sta->sdata->vif)) |
| ieee80211s_update_metric(local, sta, skb); |
| |
| if (!(info->flags & IEEE80211_TX_CTL_INJECTED) && acked) |
| ieee80211_frame_acked(sta, skb); |
| |
| if ((sta->sdata->vif.type == NL80211_IFTYPE_STATION) && |
| (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) |
| ieee80211_sta_tx_notify(sta->sdata, (void *) skb->data, acked); |
| |
| if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) { |
| if (info->flags & IEEE80211_TX_STAT_ACK) { |
| if (sta->lost_packets) |
| sta->lost_packets = 0; |
| } else if (++sta->lost_packets >= STA_LOST_PKT_THRESHOLD) { |
| cfg80211_cqm_pktloss_notify(sta->sdata->dev, |
| sta->sta.addr, |
| sta->lost_packets, |
| GFP_ATOMIC); |
| sta->lost_packets = 0; |
| } |
| } |
| |
| if (acked) |
| sta->last_ack_signal = info->status.ack_signal; |
| } |
| |
| rcu_read_unlock(); |
| |
| ieee80211_led_tx(local, 0); |
| |
| /* SNMP counters |
| * Fragments are passed to low-level drivers as separate skbs, so these |
| * are actually fragments, not frames. Update frame counters only for |
| * the first fragment of the frame. */ |
| if (info->flags & IEEE80211_TX_STAT_ACK) { |
| if (ieee80211_is_first_frag(hdr->seq_ctrl)) { |
| local->dot11TransmittedFrameCount++; |
| if (is_multicast_ether_addr(hdr->addr1)) |
| local->dot11MulticastTransmittedFrameCount++; |
| if (retry_count > 0) |
| local->dot11RetryCount++; |
| if (retry_count > 1) |
| local->dot11MultipleRetryCount++; |
| } |
| |
| /* This counter shall be incremented for an acknowledged MPDU |
| * with an individual address in the address 1 field or an MPDU |
| * with a multicast address in the address 1 field of type Data |
| * or Management. */ |
| if (!is_multicast_ether_addr(hdr->addr1) || |
| ieee80211_is_data(fc) || |
| ieee80211_is_mgmt(fc)) |
| local->dot11TransmittedFragmentCount++; |
| } else { |
| if (ieee80211_is_first_frag(hdr->seq_ctrl)) |
| local->dot11FailedCount++; |
| } |
| |
| if (ieee80211_is_nullfunc(fc) && ieee80211_has_pm(fc) && |
| (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) && |
| !(info->flags & IEEE80211_TX_CTL_INJECTED) && |
| local->ps_sdata && !(local->scanning)) { |
| if (info->flags & IEEE80211_TX_STAT_ACK) { |
| local->ps_sdata->u.mgd.flags |= |
| IEEE80211_STA_NULLFUNC_ACKED; |
| } else |
| mod_timer(&local->dynamic_ps_timer, jiffies + |
| msecs_to_jiffies(10)); |
| } |
| |
| ieee80211_report_used_skb(local, skb, false); |
| |
| /* this was a transmitted frame, but now we want to reuse it */ |
| skb_orphan(skb); |
| |
| /* Need to make a copy before skb->cb gets cleared */ |
| send_to_cooked = !!(info->flags & IEEE80211_TX_CTL_INJECTED) || |
| !(ieee80211_is_data(fc)); |
| |
| /* |
| * This is a bit racy but we can avoid a lot of work |
| * with this test... |
| */ |
| if (!local->monitors && (!send_to_cooked || !local->cooked_mntrs)) { |
| dev_kfree_skb(skb); |
| return; |
| } |
| |
| /* send frame to monitor interfaces now */ |
| rtap_len = ieee80211_tx_radiotap_len(info); |
| if (WARN_ON_ONCE(skb_headroom(skb) < rtap_len)) { |
| pr_err("ieee80211_tx_status: headroom too small\n"); |
| dev_kfree_skb(skb); |
| return; |
| } |
| ieee80211_add_tx_radiotap_header(sband, skb, retry_count, rtap_len); |
| |
| /* XXX: is this sufficient for BPF? */ |
| skb_set_mac_header(skb, 0); |
| skb->ip_summed = CHECKSUM_UNNECESSARY; |
| skb->pkt_type = PACKET_OTHERHOST; |
| skb->protocol = htons(ETH_P_802_2); |
| memset(skb->cb, 0, sizeof(skb->cb)); |
| |
| rcu_read_lock(); |
| list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
| if (sdata->vif.type == NL80211_IFTYPE_MONITOR) { |
| if (!ieee80211_sdata_running(sdata)) |
| continue; |
| |
| if ((sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) && |
| !send_to_cooked) |
| continue; |
| |
| if (prev_dev) { |
| skb2 = skb_clone(skb, GFP_ATOMIC); |
| if (skb2) { |
| skb2->dev = prev_dev; |
| netif_rx(skb2); |
| } |
| } |
| |
| prev_dev = sdata->dev; |
| } |
| } |
| if (prev_dev) { |
| skb->dev = prev_dev; |
| netif_rx(skb); |
| skb = NULL; |
| } |
| rcu_read_unlock(); |
| dev_kfree_skb(skb); |
| } |
| EXPORT_SYMBOL(ieee80211_tx_status); |
| |
| void ieee80211_report_low_ack(struct ieee80211_sta *pubsta, u32 num_packets) |
| { |
| struct sta_info *sta = container_of(pubsta, struct sta_info, sta); |
| cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr, |
| num_packets, GFP_ATOMIC); |
| } |
| EXPORT_SYMBOL(ieee80211_report_low_ack); |
| |
| void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb) |
| { |
| struct ieee80211_local *local = hw_to_local(hw); |
| |
| ieee80211_report_used_skb(local, skb, true); |
| dev_kfree_skb_any(skb); |
| } |
| EXPORT_SYMBOL(ieee80211_free_txskb); |
| |
| void ieee80211_purge_tx_queue(struct ieee80211_hw *hw, |
| struct sk_buff_head *skbs) |
| { |
| struct sk_buff *skb; |
| |
| while ((skb = __skb_dequeue(skbs))) |
| ieee80211_free_txskb(hw, skb); |
| } |