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-rw-r--r--net/mac80211/status.c273
1 files changed, 168 insertions, 105 deletions
diff --git a/net/mac80211/status.c b/net/mac80211/status.c
index 89290e33dafe..005fdbe39a8b 100644
--- a/net/mac80211/status.c
+++ b/net/mac80211/status.c
@@ -12,7 +12,6 @@
#include <linux/export.h>
#include <linux/etherdevice.h>
-#include <linux/time.h>
#include <net/mac80211.h>
#include <asm/unaligned.h>
#include "ieee80211_i.h"
@@ -390,6 +389,46 @@ ieee80211_add_tx_radiotap_header(struct ieee80211_local *local,
}
}
+/*
+ * Handles the tx for TDLS teardown frames.
+ * If the frame wasn't ACKed by the peer - it will be re-sent through the AP
+ */
+static void ieee80211_tdls_td_tx_handle(struct ieee80211_local *local,
+ struct ieee80211_sub_if_data *sdata,
+ struct sk_buff *skb, u32 flags)
+{
+ struct sk_buff *teardown_skb;
+ struct sk_buff *orig_teardown_skb;
+ bool is_teardown = false;
+
+ /* Get the teardown data we need and free the lock */
+ spin_lock(&sdata->u.mgd.teardown_lock);
+ teardown_skb = sdata->u.mgd.teardown_skb;
+ orig_teardown_skb = sdata->u.mgd.orig_teardown_skb;
+ if ((skb == orig_teardown_skb) && teardown_skb) {
+ sdata->u.mgd.teardown_skb = NULL;
+ sdata->u.mgd.orig_teardown_skb = NULL;
+ is_teardown = true;
+ }
+ spin_unlock(&sdata->u.mgd.teardown_lock);
+
+ if (is_teardown) {
+ /* This mechanism relies on being able to get ACKs */
+ WARN_ON(!(local->hw.flags &
+ IEEE80211_HW_REPORTS_TX_ACK_STATUS));
+
+ /* Check if peer has ACKed */
+ if (flags & IEEE80211_TX_STAT_ACK) {
+ dev_kfree_skb_any(teardown_skb);
+ } else {
+ tdls_dbg(sdata,
+ "TDLS Resending teardown through AP\n");
+
+ ieee80211_subif_start_xmit(teardown_skb, skb->dev);
+ }
+ }
+}
+
static void ieee80211_report_used_skb(struct ieee80211_local *local,
struct sk_buff *skb, bool dropped)
{
@@ -426,8 +465,19 @@ static void ieee80211_report_used_skb(struct ieee80211_local *local,
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);
+ 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);
} else if (ieee80211_is_nullfunc(hdr->frame_control) ||
ieee80211_is_qos_nullfunc(hdr->frame_control)) {
cfg80211_probe_status(sdata->dev, hdr->addr1,
@@ -464,73 +514,6 @@ static void ieee80211_report_used_skb(struct ieee80211_local *local,
}
/*
- * Measure Tx frame completion and removal time for Tx latency statistics
- * calculation. A single Tx frame latency should be measured from when it
- * is entering the Kernel until we receive Tx complete confirmation indication
- * and remove the skb.
- */
-static void ieee80211_tx_latency_end_msrmnt(struct ieee80211_local *local,
- struct sk_buff *skb,
- struct sta_info *sta,
- struct ieee80211_hdr *hdr)
-{
- u32 msrmnt;
- u16 tid;
- u8 *qc;
- int i, bin_range_count;
- u32 *bin_ranges;
- __le16 fc;
- struct ieee80211_tx_latency_stat *tx_lat;
- struct ieee80211_tx_latency_bin_ranges *tx_latency;
- ktime_t skb_arv = skb->tstamp;
-
- tx_latency = rcu_dereference(local->tx_latency);
-
- /* assert Tx latency stats are enabled & frame arrived when enabled */
- if (!tx_latency || !ktime_to_ns(skb_arv))
- return;
-
- fc = hdr->frame_control;
-
- if (!ieee80211_is_data(fc)) /* make sure it is a data frame */
- return;
-
- /* get frame tid */
- if (ieee80211_is_data_qos(hdr->frame_control)) {
- qc = ieee80211_get_qos_ctl(hdr);
- tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
- } else {
- tid = 0;
- }
-
- tx_lat = &sta->tx_lat[tid];
-
- /* Calculate the latency */
- msrmnt = ktime_to_ms(ktime_sub(ktime_get(), skb_arv));
-
- if (tx_lat->max < msrmnt) /* update stats */
- tx_lat->max = msrmnt;
- tx_lat->counter++;
- tx_lat->sum += msrmnt;
-
- if (!tx_lat->bins) /* bins not activated */
- return;
-
- /* count how many Tx frames transmitted with the appropriate latency */
- bin_range_count = tx_latency->n_ranges;
- bin_ranges = tx_latency->ranges;
-
- for (i = 0; i < bin_range_count; i++) {
- if (msrmnt <= bin_ranges[i]) {
- tx_lat->bins[i]++;
- break;
- }
- }
- if (i == bin_range_count) /* msrmnt is bigger than the biggest range */
- tx_lat->bins[i]++;
-}
-
-/*
* Use a static threshold for now, best value to be determined
* by testing ...
* Should it depend on:
@@ -541,10 +524,9 @@ static void ieee80211_tx_latency_end_msrmnt(struct ieee80211_local *local,
#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 sk_buff *skb)
+static void ieee80211_lost_packet(struct sta_info *sta,
+ struct ieee80211_tx_info *info)
{
- struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
-
/* This packet was aggregated but doesn't carry status info */
if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
!(info->flags & IEEE80211_TX_STAT_AMPDU))
@@ -571,24 +553,13 @@ static void ieee80211_lost_packet(struct sta_info *sta, struct sk_buff *skb)
sta->lost_packets = 0;
}
-void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
+static int ieee80211_tx_get_rates(struct ieee80211_hw *hw,
+ struct ieee80211_tx_info *info,
+ int *retry_count)
{
- 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;
- int shift = 0;
+ int count = -1;
+ int i;
for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
@@ -606,19 +577,105 @@ void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
break;
}
- retry_count += info->status.rates[i].count;
+ count += info->status.rates[i].count;
}
rates_idx = i - 1;
- if (retry_count < 0)
- retry_count = 0;
+ if (count < 0)
+ count = 0;
+
+ *retry_count = count;
+ return rates_idx;
+}
+
+void ieee80211_tx_status_noskb(struct ieee80211_hw *hw,
+ struct ieee80211_sta *pubsta,
+ struct ieee80211_tx_info *info)
+{
+ struct ieee80211_local *local = hw_to_local(hw);
+ struct ieee80211_supported_band *sband;
+ int retry_count;
+ int rates_idx;
+ bool acked, noack_success;
+
+ rates_idx = 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->tx_retry_failed++;
+ sta->tx_retry_count += retry_count;
+
+ if (acked) {
+ sta->last_rx = jiffies;
+
+ if (sta->lost_packets)
+ sta->lost_packets = 0;
+
+ /* Track when last TDLS packet was ACKed */
+ if (test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH))
+ sta->last_tdls_pkt_time = jiffies;
+ } else {
+ ieee80211_lost_packet(sta, info);
+ }
+
+ rate_control_tx_status_noskb(local, sband, sta, info);
+ }
+
+ if (acked || noack_success) {
+ local->dot11TransmittedFrameCount++;
+ if (!pubsta)
+ local->dot11MulticastTransmittedFrameCount++;
+ if (retry_count > 0)
+ local->dot11RetryCount++;
+ if (retry_count > 1)
+ local->dot11MultipleRetryCount++;
+ } else {
+ local->dot11FailedCount++;
+ }
+}
+EXPORT_SYMBOL(ieee80211_tx_status_noskb);
+
+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;
+ struct rhash_head *tmp;
+ int retry_count;
+ int rates_idx;
+ bool send_to_cooked;
+ bool acked;
+ struct ieee80211_bar *bar;
+ int rtap_len;
+ int shift = 0;
+ int tid = IEEE80211_NUM_TIDS;
+ const struct bucket_table *tbl;
+
+ rates_idx = ieee80211_tx_get_rates(hw, info, &retry_count);
rcu_read_lock();
sband = local->hw.wiphy->bands[info->band];
fc = hdr->frame_control;
- for_each_sta_info(local, hdr->addr1, sta, tmp) {
+ tbl = rht_dereference_rcu(local->sta_hash.tbl, &local->sta_hash);
+
+ for_each_sta_info(local, tbl, hdr->addr1, sta, tmp) {
/* skip wrong virtual interface */
if (!ether_addr_equal(hdr->addr2, sta->sdata->vif.addr))
continue;
@@ -653,7 +710,7 @@ void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) &&
(ieee80211_is_data_qos(fc))) {
- u16 tid, ssn;
+ u16 ssn;
u8 *qc;
qc = ieee80211_get_qos_ctl(hdr);
@@ -662,10 +719,14 @@ void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
& 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 tid, control;
+ u16 control;
/*
* BAR failed, store the last SSN and retry sending
@@ -693,6 +754,12 @@ void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
if (!acked)
sta->tx_retry_failed++;
sta->tx_retry_count += retry_count;
+
+ if (ieee80211_is_data_present(fc)) {
+ if (!acked)
+ sta->tx_msdu_failed[tid]++;
+ sta->tx_msdu_retries[tid] += retry_count;
+ }
}
rate_control_tx_status(local, sband, sta, skb);
@@ -704,7 +771,8 @@ void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *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);
+ ieee80211_sta_tx_notify(sta->sdata, (void *) skb->data,
+ acked, info->status.tx_time);
if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
if (info->flags & IEEE80211_TX_STAT_ACK) {
@@ -715,18 +783,12 @@ void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
if (test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH))
sta->last_tdls_pkt_time = jiffies;
} else {
- ieee80211_lost_packet(sta, skb);
+ ieee80211_lost_packet(sta, info);
}
}
if (acked)
sta->last_ack_signal = info->status.ack_signal;
-
- /*
- * Measure frame removal for tx latency
- * statistics calculation
- */
- ieee80211_tx_latency_end_msrmnt(local, skb, sta, hdr);
}
rcu_read_unlock();
@@ -737,10 +799,11 @@ void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
* 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 ((info->flags & IEEE80211_TX_STAT_ACK) ||
+ (info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED)) {
if (ieee80211_is_first_frag(hdr->seq_ctrl)) {
local->dot11TransmittedFrameCount++;
- if (is_multicast_ether_addr(hdr->addr1))
+ if (is_multicast_ether_addr(ieee80211_get_DA(hdr)))
local->dot11MulticastTransmittedFrameCount++;
if (retry_count > 0)
local->dot11RetryCount++;