Collect per-rate statistics about TX/RX frames for each STA if
mac80211 debug counters are enabled and make this information
available in debugfs.
Signed-off-by: Jouni Malinen <jouni.malinen@xxxxxxxxxxx>
---
net/mac80211/debugfs_sta.c | 45 +++++++++++++++++++++++++++++++++++++++++++++
net/mac80211/main.c | 20 ++++++++++++++++++++
net/mac80211/rx.c | 15 +++++++++++++++
net/mac80211/sta_info.h | 18 ++++++++++++++++++
4 files changed, 98 insertions(+)
--- wireless-testing.orig/net/mac80211/debugfs_sta.c 2008-12-04 12:52:40.000000000 +0200
+++ wireless-testing/net/mac80211/debugfs_sta.c 2008-12-15 15:11:10.000000000 +0200
@@ -163,6 +163,45 @@ static ssize_t sta_agg_status_read(struc
}
STA_OPS(agg_status);
+#ifdef CONFIG_MAC80211_DEBUG_COUNTERS
+static ssize_t sta_txrx_read(struct file *file, char __user *userbuf,
+ size_t count, loff_t *ppos)
+{
+ char buf[500], *p = buf;
+ struct sta_info *sta = file->private_data;
+ int i;
+
+ p += scnprintf(p, sizeof(buf) - (p - buf),
+ "rate\tRX\tTX\texc\tretries\n");
+ for (i = 0; i < NUM_STATS_RATES; i++) {
+ if (sta->rx_frames[i] == 0 &&
+ sta->tx_frames[i] == 0 &&
+ sta->tx_exc_retries[i] == 0 &&
+ sta->tx_retries[i] == 0)
+ continue;
+ p += scnprintf(p, sizeof(buf) - (p - buf),
+ "%d\t%lu\t%lu\t%lu\t%lu\n",
+ i, sta->rx_frames[i], sta->tx_frames[i],
+ sta->tx_exc_retries[i], sta->tx_retries[i]);
+ }
+ for (i = 0; i < NUM_STATS_MCS; i++) {
+ if (sta->rx_frames_mcs[i] == 0 &&
+ sta->tx_frames_mcs[i] == 0 &&
+ sta->tx_exc_retries_mcs[i] == 0 &&
+ sta->tx_retries_mcs[i] == 0)
+ continue;
+ p += scnprintf(p, sizeof(buf) - (p - buf),
+ "MCS%d\t%lu\t%lu\t%lu\t%lu\n",
+ i, sta->rx_frames_mcs[i], sta->tx_frames_mcs[i],
+ sta->tx_exc_retries_mcs[i],
+ sta->tx_retries_mcs[i]);
+ }
+
+ return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
+}
+STA_OPS(txrx);
+#endif
+
#define DEBUGFS_ADD(name) \
sta->debugfs.name = debugfs_create_file(#name, 0400, \
sta->debugfs.dir, sta, &sta_ ##name## _ops);
@@ -203,6 +242,9 @@ void ieee80211_sta_debugfs_add(struct st
DEBUGFS_ADD(inactive_ms);
DEBUGFS_ADD(last_seq_ctrl);
DEBUGFS_ADD(agg_status);
+#ifdef CONFIG_MAC80211_DEBUG_COUNTERS
+ DEBUGFS_ADD(txrx);
+#endif
}
void ieee80211_sta_debugfs_remove(struct sta_info *sta)
@@ -212,6 +254,9 @@ void ieee80211_sta_debugfs_remove(struct
DEBUGFS_DEL(inactive_ms);
DEBUGFS_DEL(last_seq_ctrl);
DEBUGFS_DEL(agg_status);
+#ifdef CONFIG_MAC80211_DEBUG_COUNTERS
+ DEBUGFS_DEL(txrx);
+#endif
debugfs_remove(sta->debugfs.dir);
sta->debugfs.dir = NULL;
--- wireless-testing.orig/net/mac80211/rx.c 2008-12-15 13:22:50.000000000 +0200
+++ wireless-testing/net/mac80211/rx.c 2008-12-15 13:39:17.000000000 +0200
@@ -2252,6 +2252,21 @@ void __ieee80211_rx(struct ieee80211_hw
*/
rcu_read_lock();
+#ifdef CONFIG_MAC80211_DEBUG_COUNTERS
+ if (skb->len >= 16) {
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+ struct sta_info *sta = sta_info_get(local, hdr->addr2);
+ if (sta) {
+ if (status->flag & RX_FLAG_HT &&
+ status->rate_idx < NUM_STATS_MCS)
+ sta->rx_frames_mcs[status->rate_idx]++;
+ if (!(status->flag & RX_FLAG_HT) &&
+ status->rate_idx < NUM_STATS_RATES)
+ sta->rx_frames[status->rate_idx]++;
+ }
+ }
+#endif
+
/*
* Frames with failed FCS/PLCP checksum are not returned,
* all other frames are returned without radiotap header
--- wireless-testing.orig/net/mac80211/sta_info.h 2008-12-04 12:52:40.000000000 +0200
+++ wireless-testing/net/mac80211/sta_info.h 2008-12-15 15:03:34.000000000 +0200
@@ -151,6 +151,9 @@ struct sta_ampdu_mlme {
#define STA_INFO_PIN_STAT_PINNED 1
#define STA_INFO_PIN_STAT_DESTROY 2
+#define NUM_STATS_RATES 20
+#define NUM_STATS_MCS 76
+
/**
* struct sta_info - STA information
*
@@ -255,6 +258,10 @@ struct sta_info {
int last_qual;
int last_noise;
__le16 last_seq_ctrl[NUM_RX_DATA_QUEUES];
+#ifdef CONFIG_MAC80211_DEBUG_COUNTERS
+ unsigned long rx_frames[NUM_STATS_RATES];
+ unsigned long rx_frames_mcs[NUM_STATS_MCS];
+#endif
/* Updated from TX status path only, no locking requirements */
unsigned long tx_filtered_count;
@@ -268,6 +275,14 @@ struct sta_info {
unsigned long tx_fragments;
struct ieee80211_tx_rate last_tx_rate;
u16 tid_seq[IEEE80211_QOS_CTL_TID_MASK + 1];
+#ifdef CONFIG_MAC80211_DEBUG_COUNTERS
+ unsigned long tx_frames[NUM_STATS_RATES];
+ unsigned long tx_retries[NUM_STATS_RATES];
+ unsigned long tx_exc_retries[NUM_STATS_RATES];
+ unsigned long tx_frames_mcs[NUM_STATS_MCS];
+ unsigned long tx_retries_mcs[NUM_STATS_MCS];
+ unsigned long tx_exc_retries_mcs[NUM_STATS_MCS];
+#endif
/*
* Aggregation information, locked with lock.
@@ -298,6 +313,9 @@ struct sta_info {
struct dentry *num_ps_buf_frames;
struct dentry *inactive_ms;
struct dentry *last_seq_ctrl;
+#ifdef CONFIG_MAC80211_DEBUG_COUNTERS
+ struct dentry *txrx;
+#endif
struct dentry *agg_status;
bool add_has_run;
} debugfs;
--- wireless-testing.orig/net/mac80211/main.c 2008-12-15 10:08:12.000000000 +0200
+++ wireless-testing/net/mac80211/main.c 2008-12-15 15:10:48.000000000 +0200
@@ -501,6 +501,26 @@ void ieee80211_tx_status(struct ieee8021
sta = sta_info_get(local, hdr->addr1);
if (sta) {
+#ifdef CONFIG_MAC80211_DEBUG_COUNTERS
+ int idx = info->status.rates[0].idx;
+ if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS) {
+ if (idx >= 0 && idx < NUM_STATS_MCS) {
+ sta->tx_frames_mcs[idx]++;
+ sta->tx_retries_mcs[idx] +=
+ info->status.rates[0].count;
+ if (!(info->flags & (IEEE80211_TX_CTL_NO_ACK |
+ IEEE80211_TX_STAT_ACK)))
+ sta->tx_exc_retries_mcs[idx]++;
+ }
+ } else if (idx >= 0 && idx < NUM_STATS_RATES) {
+ sta->tx_frames[idx]++;
+ sta->tx_retries[idx] += info->status.rates[0].count;
+ if (!(info->flags & (IEEE80211_TX_CTL_NO_ACK |
+ IEEE80211_TX_STAT_ACK)))
+ sta->tx_exc_retries[idx]++;
+ }
+#endif
+
if (!(info->flags & IEEE80211_TX_STAT_ACK) &&
test_sta_flags(sta, WLAN_STA_PS)) {
/*
--
Jouni Malinen PGP id EFC895FA
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