![Venkateswara Naralasetty](/assets/img/avatar_default.png)
This allows users to get ack signal strength of last transmitted frame. Signed-off-by: Venkateswara Naralasetty <vnaralas@codeaurora.org> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
1014 lines
29 KiB
C
1014 lines
29 KiB
C
/*
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* Copyright 2002-2005, Instant802 Networks, Inc.
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* Copyright 2005-2006, Devicescape Software, Inc.
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* Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
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* Copyright 2008-2010 Johannes Berg <johannes@sipsolutions.net>
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* Copyright 2013-2014 Intel Mobile Communications GmbH
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/export.h>
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#include <linux/etherdevice.h>
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#include <net/mac80211.h>
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#include <asm/unaligned.h>
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#include "ieee80211_i.h"
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#include "rate.h"
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#include "mesh.h"
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#include "led.h"
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#include "wme.h"
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void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
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struct sk_buff *skb)
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{
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struct ieee80211_local *local = hw_to_local(hw);
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struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
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int tmp;
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skb->pkt_type = IEEE80211_TX_STATUS_MSG;
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skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ?
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&local->skb_queue : &local->skb_queue_unreliable, skb);
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tmp = skb_queue_len(&local->skb_queue) +
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skb_queue_len(&local->skb_queue_unreliable);
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while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
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(skb = skb_dequeue(&local->skb_queue_unreliable))) {
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ieee80211_free_txskb(hw, skb);
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tmp--;
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I802_DEBUG_INC(local->tx_status_drop);
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}
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tasklet_schedule(&local->tasklet);
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}
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EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
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static void ieee80211_handle_filtered_frame(struct ieee80211_local *local,
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struct sta_info *sta,
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struct sk_buff *skb)
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{
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struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
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struct ieee80211_hdr *hdr = (void *)skb->data;
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int ac;
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if (info->flags & (IEEE80211_TX_CTL_NO_PS_BUFFER |
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IEEE80211_TX_CTL_AMPDU)) {
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ieee80211_free_txskb(&local->hw, skb);
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return;
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}
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/*
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* This skb 'survived' a round-trip through the driver, and
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* hopefully the driver didn't mangle it too badly. However,
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* we can definitely not rely on the control information
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* being correct. Clear it so we don't get junk there, and
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* indicate that it needs new processing, but must not be
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* modified/encrypted again.
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*/
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memset(&info->control, 0, sizeof(info->control));
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info->control.jiffies = jiffies;
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info->control.vif = &sta->sdata->vif;
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info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING |
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IEEE80211_TX_INTFL_RETRANSMISSION;
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info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
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sta->status_stats.filtered++;
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/*
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* Clear more-data bit on filtered frames, it might be set
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* but later frames might time out so it might have to be
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* clear again ... It's all rather unlikely (this frame
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* should time out first, right?) but let's not confuse
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* peers unnecessarily.
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*/
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if (hdr->frame_control & cpu_to_le16(IEEE80211_FCTL_MOREDATA))
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hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_MOREDATA);
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if (ieee80211_is_data_qos(hdr->frame_control)) {
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u8 *p = ieee80211_get_qos_ctl(hdr);
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int tid = *p & IEEE80211_QOS_CTL_TID_MASK;
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/*
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* Clear EOSP if set, this could happen e.g.
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* if an absence period (us being a P2P GO)
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* shortens the SP.
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*/
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if (*p & IEEE80211_QOS_CTL_EOSP)
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*p &= ~IEEE80211_QOS_CTL_EOSP;
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ac = ieee80211_ac_from_tid(tid);
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} else {
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ac = IEEE80211_AC_BE;
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}
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/*
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* Clear the TX filter mask for this STA when sending the next
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* packet. If the STA went to power save mode, this will happen
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* when it wakes up for the next time.
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*/
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set_sta_flag(sta, WLAN_STA_CLEAR_PS_FILT);
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ieee80211_clear_fast_xmit(sta);
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/*
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* This code races in the following way:
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*
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* (1) STA sends frame indicating it will go to sleep and does so
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* (2) hardware/firmware adds STA to filter list, passes frame up
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* (3) hardware/firmware processes TX fifo and suppresses a frame
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* (4) we get TX status before having processed the frame and
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* knowing that the STA has gone to sleep.
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*
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* This is actually quite unlikely even when both those events are
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* processed from interrupts coming in quickly after one another or
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* even at the same time because we queue both TX status events and
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* RX frames to be processed by a tasklet and process them in the
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* same order that they were received or TX status last. Hence, there
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* is no race as long as the frame RX is processed before the next TX
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* status, which drivers can ensure, see below.
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*
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* Note that this can only happen if the hardware or firmware can
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* actually add STAs to the filter list, if this is done by the
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* driver in response to set_tim() (which will only reduce the race
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* this whole filtering tries to solve, not completely solve it)
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* this situation cannot happen.
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*
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* To completely solve this race drivers need to make sure that they
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* (a) don't mix the irq-safe/not irq-safe TX status/RX processing
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* functions and
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* (b) always process RX events before TX status events if ordering
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* can be unknown, for example with different interrupt status
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* bits.
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* (c) if PS mode transitions are manual (i.e. the flag
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* %IEEE80211_HW_AP_LINK_PS is set), always process PS state
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* changes before calling TX status events if ordering can be
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* unknown.
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*/
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if (test_sta_flag(sta, WLAN_STA_PS_STA) &&
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skb_queue_len(&sta->tx_filtered[ac]) < STA_MAX_TX_BUFFER) {
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skb_queue_tail(&sta->tx_filtered[ac], skb);
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sta_info_recalc_tim(sta);
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if (!timer_pending(&local->sta_cleanup))
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mod_timer(&local->sta_cleanup,
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round_jiffies(jiffies +
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STA_INFO_CLEANUP_INTERVAL));
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return;
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}
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if (!test_sta_flag(sta, WLAN_STA_PS_STA) &&
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!(info->flags & IEEE80211_TX_INTFL_RETRIED)) {
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/* Software retry the packet once */
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info->flags |= IEEE80211_TX_INTFL_RETRIED;
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ieee80211_add_pending_skb(local, skb);
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return;
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}
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ps_dbg_ratelimited(sta->sdata,
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"dropped TX filtered frame, queue_len=%d PS=%d @%lu\n",
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skb_queue_len(&sta->tx_filtered[ac]),
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!!test_sta_flag(sta, WLAN_STA_PS_STA), jiffies);
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ieee80211_free_txskb(&local->hw, skb);
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}
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static void ieee80211_check_pending_bar(struct sta_info *sta, u8 *addr, u8 tid)
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{
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struct tid_ampdu_tx *tid_tx;
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tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
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if (!tid_tx || !tid_tx->bar_pending)
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return;
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tid_tx->bar_pending = false;
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ieee80211_send_bar(&sta->sdata->vif, addr, tid, tid_tx->failed_bar_ssn);
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}
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static void ieee80211_frame_acked(struct sta_info *sta, struct sk_buff *skb)
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{
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struct ieee80211_mgmt *mgmt = (void *) skb->data;
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struct ieee80211_local *local = sta->local;
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struct ieee80211_sub_if_data *sdata = sta->sdata;
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struct ieee80211_tx_info *txinfo = IEEE80211_SKB_CB(skb);
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if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
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sta->status_stats.last_ack = jiffies;
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if (txinfo->status.is_valid_ack_signal) {
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sta->status_stats.last_ack_signal =
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(s8)txinfo->status.ack_signal;
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sta->status_stats.ack_signal_filled = true;
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}
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}
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if (ieee80211_is_data_qos(mgmt->frame_control)) {
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struct ieee80211_hdr *hdr = (void *) skb->data;
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u8 *qc = ieee80211_get_qos_ctl(hdr);
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u16 tid = qc[0] & 0xf;
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ieee80211_check_pending_bar(sta, hdr->addr1, tid);
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}
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if (ieee80211_is_action(mgmt->frame_control) &&
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!ieee80211_has_protected(mgmt->frame_control) &&
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mgmt->u.action.category == WLAN_CATEGORY_HT &&
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mgmt->u.action.u.ht_smps.action == WLAN_HT_ACTION_SMPS &&
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ieee80211_sdata_running(sdata)) {
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enum ieee80211_smps_mode smps_mode;
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switch (mgmt->u.action.u.ht_smps.smps_control) {
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case WLAN_HT_SMPS_CONTROL_DYNAMIC:
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smps_mode = IEEE80211_SMPS_DYNAMIC;
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break;
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case WLAN_HT_SMPS_CONTROL_STATIC:
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smps_mode = IEEE80211_SMPS_STATIC;
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break;
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case WLAN_HT_SMPS_CONTROL_DISABLED:
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default: /* shouldn't happen since we don't send that */
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smps_mode = IEEE80211_SMPS_OFF;
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break;
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}
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if (sdata->vif.type == NL80211_IFTYPE_STATION) {
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/*
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* This update looks racy, but isn't -- if we come
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* here we've definitely got a station that we're
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* talking to, and on a managed interface that can
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* only be the AP. And the only other place updating
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* this variable in managed mode is before association.
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*/
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sdata->smps_mode = smps_mode;
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ieee80211_queue_work(&local->hw, &sdata->recalc_smps);
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} else if (sdata->vif.type == NL80211_IFTYPE_AP ||
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sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
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sta->known_smps_mode = smps_mode;
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}
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}
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}
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static void ieee80211_set_bar_pending(struct sta_info *sta, u8 tid, u16 ssn)
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{
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struct tid_ampdu_tx *tid_tx;
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tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
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if (!tid_tx)
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return;
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tid_tx->failed_bar_ssn = ssn;
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tid_tx->bar_pending = true;
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}
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static int ieee80211_tx_radiotap_len(struct ieee80211_tx_info *info)
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{
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int len = sizeof(struct ieee80211_radiotap_header);
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/* IEEE80211_RADIOTAP_RATE rate */
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if (info->status.rates[0].idx >= 0 &&
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!(info->status.rates[0].flags & (IEEE80211_TX_RC_MCS |
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IEEE80211_TX_RC_VHT_MCS)))
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len += 2;
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/* IEEE80211_RADIOTAP_TX_FLAGS */
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len += 2;
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/* IEEE80211_RADIOTAP_DATA_RETRIES */
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len += 1;
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/* IEEE80211_RADIOTAP_MCS
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* IEEE80211_RADIOTAP_VHT */
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if (info->status.rates[0].idx >= 0) {
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if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS)
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len += 3;
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else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS)
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len = ALIGN(len, 2) + 12;
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}
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return len;
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}
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static void
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ieee80211_add_tx_radiotap_header(struct ieee80211_local *local,
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struct ieee80211_supported_band *sband,
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struct sk_buff *skb, int retry_count,
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int rtap_len, int shift)
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{
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struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
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struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
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struct ieee80211_radiotap_header *rthdr;
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unsigned char *pos;
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u16 txflags;
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rthdr = skb_push(skb, rtap_len);
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memset(rthdr, 0, rtap_len);
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rthdr->it_len = cpu_to_le16(rtap_len);
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rthdr->it_present =
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cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
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(1 << IEEE80211_RADIOTAP_DATA_RETRIES));
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pos = (unsigned char *)(rthdr + 1);
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/*
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* XXX: Once radiotap gets the bitmap reset thing the vendor
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* extensions proposal contains, we can actually report
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* the whole set of tries we did.
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*/
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/* IEEE80211_RADIOTAP_RATE */
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if (info->status.rates[0].idx >= 0 &&
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!(info->status.rates[0].flags & (IEEE80211_TX_RC_MCS |
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IEEE80211_TX_RC_VHT_MCS))) {
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u16 rate;
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rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE);
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rate = sband->bitrates[info->status.rates[0].idx].bitrate;
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*pos = DIV_ROUND_UP(rate, 5 * (1 << shift));
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/* padding for tx flags */
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pos += 2;
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}
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/* IEEE80211_RADIOTAP_TX_FLAGS */
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txflags = 0;
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if (!(info->flags & IEEE80211_TX_STAT_ACK) &&
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!is_multicast_ether_addr(hdr->addr1))
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txflags |= IEEE80211_RADIOTAP_F_TX_FAIL;
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if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
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txflags |= IEEE80211_RADIOTAP_F_TX_CTS;
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if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS)
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txflags |= IEEE80211_RADIOTAP_F_TX_RTS;
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put_unaligned_le16(txflags, pos);
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pos += 2;
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/* IEEE80211_RADIOTAP_DATA_RETRIES */
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/* for now report the total retry_count */
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*pos = retry_count;
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pos++;
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if (info->status.rates[0].idx < 0)
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return;
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/* IEEE80211_RADIOTAP_MCS
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* IEEE80211_RADIOTAP_VHT */
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if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS) {
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rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS);
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pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
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IEEE80211_RADIOTAP_MCS_HAVE_GI |
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IEEE80211_RADIOTAP_MCS_HAVE_BW;
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if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
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pos[1] |= IEEE80211_RADIOTAP_MCS_SGI;
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if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
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pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40;
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if (info->status.rates[0].flags & IEEE80211_TX_RC_GREEN_FIELD)
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pos[1] |= IEEE80211_RADIOTAP_MCS_FMT_GF;
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pos[2] = info->status.rates[0].idx;
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pos += 3;
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} else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) {
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u16 known = local->hw.radiotap_vht_details &
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(IEEE80211_RADIOTAP_VHT_KNOWN_GI |
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IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH);
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rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT);
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/* required alignment from rthdr */
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pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2);
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/* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */
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put_unaligned_le16(known, pos);
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pos += 2;
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/* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */
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if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
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*pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI;
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pos++;
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/* u8 bandwidth */
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if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
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*pos = 1;
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else if (info->status.rates[0].flags & IEEE80211_TX_RC_80_MHZ_WIDTH)
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*pos = 4;
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else if (info->status.rates[0].flags & IEEE80211_TX_RC_160_MHZ_WIDTH)
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*pos = 11;
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else /* IEEE80211_TX_RC_{20_MHZ_WIDTH,FIXME:DUP_DATA} */
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*pos = 0;
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pos++;
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/* u8 mcs_nss[4] */
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*pos = (ieee80211_rate_get_vht_mcs(&info->status.rates[0]) << 4) |
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ieee80211_rate_get_vht_nss(&info->status.rates[0]);
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pos += 4;
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/* u8 coding */
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pos++;
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/* u8 group_id */
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pos++;
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/* u16 partial_aid */
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pos += 2;
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}
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}
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/*
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* Handles the tx for TDLS teardown frames.
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* If the frame wasn't ACKed by the peer - it will be re-sent through the AP
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*/
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static void ieee80211_tdls_td_tx_handle(struct ieee80211_local *local,
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struct ieee80211_sub_if_data *sdata,
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struct sk_buff *skb, u32 flags)
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{
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struct sk_buff *teardown_skb;
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struct sk_buff *orig_teardown_skb;
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bool is_teardown = false;
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/* Get the teardown data we need and free the lock */
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spin_lock(&sdata->u.mgd.teardown_lock);
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teardown_skb = sdata->u.mgd.teardown_skb;
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orig_teardown_skb = sdata->u.mgd.orig_teardown_skb;
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if ((skb == orig_teardown_skb) && teardown_skb) {
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sdata->u.mgd.teardown_skb = NULL;
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sdata->u.mgd.orig_teardown_skb = NULL;
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is_teardown = true;
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}
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spin_unlock(&sdata->u.mgd.teardown_lock);
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if (is_teardown) {
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/* This mechanism relies on being able to get ACKs */
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WARN_ON(!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS));
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/* Check if peer has ACKed */
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if (flags & IEEE80211_TX_STAT_ACK) {
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dev_kfree_skb_any(teardown_skb);
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} else {
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tdls_dbg(sdata,
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"TDLS Resending teardown through AP\n");
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|
|
ieee80211_subif_start_xmit(teardown_skb, skb->dev);
|
|
}
|
|
}
|
|
}
|
|
|
|
static struct ieee80211_sub_if_data *
|
|
ieee80211_sdata_from_skb(struct ieee80211_local *local, struct sk_buff *skb)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata;
|
|
|
|
if (skb->dev) {
|
|
list_for_each_entry_rcu(sdata, &local->interfaces, list) {
|
|
if (!sdata->dev)
|
|
continue;
|
|
|
|
if (skb->dev == sdata->dev)
|
|
return sdata;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
return rcu_dereference(local->p2p_sdata);
|
|
}
|
|
|
|
static void ieee80211_report_ack_skb(struct ieee80211_local *local,
|
|
struct ieee80211_tx_info *info,
|
|
bool acked, bool dropped)
|
|
{
|
|
struct sk_buff *skb;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&local->ack_status_lock, flags);
|
|
skb = idr_remove(&local->ack_status_frames, info->ack_frame_id);
|
|
spin_unlock_irqrestore(&local->ack_status_lock, flags);
|
|
|
|
if (!skb)
|
|
return;
|
|
|
|
if (dropped) {
|
|
dev_kfree_skb_any(skb);
|
|
return;
|
|
}
|
|
|
|
if (info->flags & IEEE80211_TX_INTFL_NL80211_FRAME_TX) {
|
|
u64 cookie = IEEE80211_SKB_CB(skb)->ack.cookie;
|
|
struct ieee80211_sub_if_data *sdata;
|
|
struct ieee80211_hdr *hdr = (void *)skb->data;
|
|
|
|
rcu_read_lock();
|
|
sdata = ieee80211_sdata_from_skb(local, skb);
|
|
if (sdata) {
|
|
if (ieee80211_is_nullfunc(hdr->frame_control) ||
|
|
ieee80211_is_qos_nullfunc(hdr->frame_control))
|
|
cfg80211_probe_status(sdata->dev, hdr->addr1,
|
|
cookie, acked,
|
|
info->status.ack_signal,
|
|
info->status.is_valid_ack_signal,
|
|
GFP_ATOMIC);
|
|
else
|
|
cfg80211_mgmt_tx_status(&sdata->wdev, cookie,
|
|
skb->data, skb->len,
|
|
acked, GFP_ATOMIC);
|
|
}
|
|
rcu_read_unlock();
|
|
|
|
dev_kfree_skb_any(skb);
|
|
} else {
|
|
/* consumes skb */
|
|
skb_complete_wifi_ack(skb, acked);
|
|
}
|
|
}
|
|
|
|
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_MLME_CONN_TX) {
|
|
struct ieee80211_sub_if_data *sdata;
|
|
|
|
rcu_read_lock();
|
|
|
|
sdata = ieee80211_sdata_from_skb(local, skb);
|
|
|
|
if (!sdata) {
|
|
skb->dev = NULL;
|
|
} else {
|
|
unsigned int hdr_size =
|
|
ieee80211_hdrlen(hdr->frame_control);
|
|
|
|
/* Check to see if packet is a TDLS teardown packet */
|
|
if (ieee80211_is_data(hdr->frame_control) &&
|
|
(ieee80211_get_tdls_action(skb, hdr_size) ==
|
|
WLAN_TDLS_TEARDOWN))
|
|
ieee80211_tdls_td_tx_handle(local, sdata, skb,
|
|
info->flags);
|
|
else
|
|
ieee80211_mgd_conn_tx_status(sdata,
|
|
hdr->frame_control,
|
|
acked);
|
|
}
|
|
|
|
rcu_read_unlock();
|
|
} else if (info->ack_frame_id) {
|
|
ieee80211_report_ack_skb(local, info, acked, dropped);
|
|
}
|
|
|
|
if (!dropped && skb->destructor) {
|
|
skb->wifi_acked_valid = 1;
|
|
skb->wifi_acked = acked;
|
|
}
|
|
|
|
ieee80211_led_tx(local);
|
|
}
|
|
|
|
/*
|
|
* 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
|
|
#define STA_LOST_TDLS_PKT_THRESHOLD 10
|
|
#define STA_LOST_TDLS_PKT_TIME (10*HZ) /* 10secs since last ACK */
|
|
|
|
static void ieee80211_lost_packet(struct sta_info *sta,
|
|
struct ieee80211_tx_info *info)
|
|
{
|
|
/* If driver relies on its own algorithm for station kickout, skip
|
|
* mac80211 packet loss mechanism.
|
|
*/
|
|
if (ieee80211_hw_check(&sta->local->hw, REPORTS_LOW_ACK))
|
|
return;
|
|
|
|
/* This packet was aggregated but doesn't carry status info */
|
|
if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
|
|
!(info->flags & IEEE80211_TX_STAT_AMPDU))
|
|
return;
|
|
|
|
sta->status_stats.lost_packets++;
|
|
if (!sta->sta.tdls &&
|
|
sta->status_stats.lost_packets < STA_LOST_PKT_THRESHOLD)
|
|
return;
|
|
|
|
/*
|
|
* If we're in TDLS mode, make sure that all STA_LOST_TDLS_PKT_THRESHOLD
|
|
* of the last packets were lost, and that no ACK was received in the
|
|
* last STA_LOST_TDLS_PKT_TIME ms, before triggering the CQM packet-loss
|
|
* mechanism.
|
|
*/
|
|
if (sta->sta.tdls &&
|
|
(sta->status_stats.lost_packets < STA_LOST_TDLS_PKT_THRESHOLD ||
|
|
time_before(jiffies,
|
|
sta->status_stats.last_tdls_pkt_time +
|
|
STA_LOST_TDLS_PKT_TIME)))
|
|
return;
|
|
|
|
cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr,
|
|
sta->status_stats.lost_packets, GFP_ATOMIC);
|
|
sta->status_stats.lost_packets = 0;
|
|
}
|
|
|
|
static int ieee80211_tx_get_rates(struct ieee80211_hw *hw,
|
|
struct ieee80211_tx_info *info,
|
|
int *retry_count)
|
|
{
|
|
int rates_idx = -1;
|
|
int count = -1;
|
|
int i;
|
|
|
|
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;
|
|
}
|
|
|
|
count += info->status.rates[i].count;
|
|
}
|
|
rates_idx = i - 1;
|
|
|
|
if (count < 0)
|
|
count = 0;
|
|
|
|
*retry_count = count;
|
|
return rates_idx;
|
|
}
|
|
|
|
void ieee80211_tx_monitor(struct ieee80211_local *local, struct sk_buff *skb,
|
|
struct ieee80211_supported_band *sband,
|
|
int retry_count, int shift, bool send_to_cooked)
|
|
{
|
|
struct sk_buff *skb2;
|
|
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
|
|
struct ieee80211_sub_if_data *sdata;
|
|
struct net_device *prev_dev = NULL;
|
|
int rtap_len;
|
|
|
|
/* 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(local, sband, skb, retry_count,
|
|
rtap_len, shift);
|
|
|
|
/* XXX: is this sufficient for BPF? */
|
|
skb_reset_mac_header(skb);
|
|
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);
|
|
}
|
|
|
|
static void __ieee80211_tx_status(struct ieee80211_hw *hw,
|
|
struct ieee80211_tx_status *status)
|
|
{
|
|
struct sk_buff *skb = status->skb;
|
|
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
|
|
struct ieee80211_local *local = hw_to_local(hw);
|
|
struct ieee80211_tx_info *info = status->info;
|
|
struct sta_info *sta;
|
|
__le16 fc;
|
|
struct ieee80211_supported_band *sband;
|
|
int retry_count;
|
|
int rates_idx;
|
|
bool send_to_cooked;
|
|
bool acked;
|
|
struct ieee80211_bar *bar;
|
|
int shift = 0;
|
|
int tid = IEEE80211_NUM_TIDS;
|
|
|
|
rates_idx = ieee80211_tx_get_rates(hw, info, &retry_count);
|
|
|
|
sband = local->hw.wiphy->bands[info->band];
|
|
fc = hdr->frame_control;
|
|
|
|
if (status->sta) {
|
|
sta = container_of(status->sta, struct sta_info, sta);
|
|
shift = ieee80211_vif_get_shift(&sta->sdata->vif);
|
|
|
|
if (info->flags & IEEE80211_TX_STATUS_EOSP)
|
|
clear_sta_flag(sta, WLAN_STA_SP);
|
|
|
|
acked = !!(info->flags & IEEE80211_TX_STAT_ACK);
|
|
|
|
/* 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 (!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);
|
|
return;
|
|
}
|
|
|
|
if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL) &&
|
|
(ieee80211_is_data(hdr->frame_control)) &&
|
|
(rates_idx != -1))
|
|
sta->tx_stats.last_rate =
|
|
info->status.rates[rates_idx];
|
|
|
|
if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) &&
|
|
(ieee80211_is_data_qos(fc))) {
|
|
u16 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);
|
|
} else if (ieee80211_is_data_qos(fc)) {
|
|
u8 *qc = ieee80211_get_qos_ctl(hdr);
|
|
|
|
tid = qc[0] & 0xf;
|
|
}
|
|
|
|
if (!acked && ieee80211_is_back_req(fc)) {
|
|
u16 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);
|
|
return;
|
|
} else {
|
|
if (!acked)
|
|
sta->status_stats.retry_failed++;
|
|
sta->status_stats.retry_count += retry_count;
|
|
|
|
if (ieee80211_is_data_present(fc)) {
|
|
if (!acked)
|
|
sta->status_stats.msdu_failed[tid]++;
|
|
|
|
sta->status_stats.msdu_retries[tid] +=
|
|
retry_count;
|
|
}
|
|
}
|
|
|
|
rate_control_tx_status(local, sband, status);
|
|
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) &&
|
|
ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
|
|
ieee80211_sta_tx_notify(sta->sdata, (void *) skb->data,
|
|
acked, info->status.tx_time);
|
|
|
|
if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
|
|
if (info->flags & IEEE80211_TX_STAT_ACK) {
|
|
if (sta->status_stats.lost_packets)
|
|
sta->status_stats.lost_packets = 0;
|
|
|
|
/* Track when last TDLS packet was ACKed */
|
|
if (test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH))
|
|
sta->status_stats.last_tdls_pkt_time =
|
|
jiffies;
|
|
} else {
|
|
ieee80211_lost_packet(sta, info);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* 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) ||
|
|
(info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED)) {
|
|
if (ieee80211_is_first_frag(hdr->seq_ctrl)) {
|
|
I802_DEBUG_INC(local->dot11TransmittedFrameCount);
|
|
if (is_multicast_ether_addr(ieee80211_get_DA(hdr)))
|
|
I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount);
|
|
if (retry_count > 0)
|
|
I802_DEBUG_INC(local->dot11RetryCount);
|
|
if (retry_count > 1)
|
|
I802_DEBUG_INC(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))
|
|
I802_DEBUG_INC(local->dot11TransmittedFragmentCount);
|
|
} else {
|
|
if (ieee80211_is_first_frag(hdr->seq_ctrl))
|
|
I802_DEBUG_INC(local->dot11FailedCount);
|
|
}
|
|
|
|
if (ieee80211_is_nullfunc(fc) && ieee80211_has_pm(fc) &&
|
|
ieee80211_hw_check(&local->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 to monitor interfaces */
|
|
ieee80211_tx_monitor(local, skb, sband, retry_count, shift, send_to_cooked);
|
|
}
|
|
|
|
void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
|
|
{
|
|
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
|
|
struct ieee80211_local *local = hw_to_local(hw);
|
|
struct ieee80211_tx_status status = {
|
|
.skb = skb,
|
|
.info = IEEE80211_SKB_CB(skb),
|
|
};
|
|
struct rhlist_head *tmp;
|
|
struct sta_info *sta;
|
|
|
|
rcu_read_lock();
|
|
|
|
for_each_sta_info(local, hdr->addr1, sta, tmp) {
|
|
/* skip wrong virtual interface */
|
|
if (!ether_addr_equal(hdr->addr2, sta->sdata->vif.addr))
|
|
continue;
|
|
|
|
status.sta = &sta->sta;
|
|
break;
|
|
}
|
|
|
|
__ieee80211_tx_status(hw, &status);
|
|
rcu_read_unlock();
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_tx_status);
|
|
|
|
void ieee80211_tx_status_ext(struct ieee80211_hw *hw,
|
|
struct ieee80211_tx_status *status)
|
|
{
|
|
struct ieee80211_local *local = hw_to_local(hw);
|
|
struct ieee80211_tx_info *info = status->info;
|
|
struct ieee80211_sta *pubsta = status->sta;
|
|
struct ieee80211_supported_band *sband;
|
|
int retry_count;
|
|
bool acked, noack_success;
|
|
|
|
if (status->skb)
|
|
return __ieee80211_tx_status(hw, status);
|
|
|
|
if (!status->sta)
|
|
return;
|
|
|
|
ieee80211_tx_get_rates(hw, info, &retry_count);
|
|
|
|
sband = hw->wiphy->bands[info->band];
|
|
|
|
acked = !!(info->flags & IEEE80211_TX_STAT_ACK);
|
|
noack_success = !!(info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED);
|
|
|
|
if (pubsta) {
|
|
struct sta_info *sta;
|
|
|
|
sta = container_of(pubsta, struct sta_info, sta);
|
|
|
|
if (!acked)
|
|
sta->status_stats.retry_failed++;
|
|
sta->status_stats.retry_count += retry_count;
|
|
|
|
if (acked) {
|
|
sta->status_stats.last_ack = jiffies;
|
|
|
|
if (sta->status_stats.lost_packets)
|
|
sta->status_stats.lost_packets = 0;
|
|
|
|
/* Track when last TDLS packet was ACKed */
|
|
if (test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH))
|
|
sta->status_stats.last_tdls_pkt_time = jiffies;
|
|
} else {
|
|
ieee80211_lost_packet(sta, info);
|
|
}
|
|
|
|
rate_control_tx_status(local, sband, status);
|
|
}
|
|
|
|
if (acked || noack_success) {
|
|
I802_DEBUG_INC(local->dot11TransmittedFrameCount);
|
|
if (!pubsta)
|
|
I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount);
|
|
if (retry_count > 0)
|
|
I802_DEBUG_INC(local->dot11RetryCount);
|
|
if (retry_count > 1)
|
|
I802_DEBUG_INC(local->dot11MultipleRetryCount);
|
|
} else {
|
|
I802_DEBUG_INC(local->dot11FailedCount);
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_tx_status_ext);
|
|
|
|
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);
|
|
}
|