This patch adds a new debugfs file "rc_stats_csv" to output Minstrels
statistics in a common csv format that is easy to parse.
Signed-off-by: Thomas Huehn <tho...@net.t-labs.tu-berlin.de>
Signed-off-by: Stefan Venz <ikstrea...@gmail.com>
---
net/mac80211/rc80211_minstrel.h | 6 +--
net/mac80211/rc80211_minstrel_debugfs.c | 95 +++++++++++++++++++++++++++++----
2 files changed, 87 insertions(+), 14 deletions(-)
diff --git a/net/mac80211/rc80211_minstrel.h b/net/mac80211/rc80211_minstrel.h
index 410efe6..9613e73 100644
--- a/net/mac80211/rc80211_minstrel.h
+++ b/net/mac80211/rc80211_minstrel.h
@@ -13,7 +13,6 @@
#define EWMA_DIV 128
#define SAMPLE_COLUMNS 10 /* number of columns in sample table */
-
/* scaled fraction values */
#define MINSTREL_SCALE 16
#define MINSTREL_FRAC(val, div) (((val) << MINSTREL_SCALE) / div)
@@ -24,7 +23,7 @@
/*
* Perform EWMA (Exponentially Weighted Moving Average) calculation
- */
+ */
static inline int
minstrel_ewma(int old, int new, int weight)
{
@@ -95,6 +94,7 @@ struct minstrel_sta_info {
#ifdef CONFIG_MAC80211_DEBUGFS
struct dentry *dbg_stats;
+ struct dentry *dbg_stats_csv;
#endif
};
@@ -121,7 +121,6 @@ struct minstrel_priv {
u32 fixed_rate_idx;
struct dentry *dbg_fixed_rate;
#endif
-
};
struct minstrel_debugfs_info {
@@ -135,6 +134,7 @@ void minstrel_remove_sta_debugfs(void *priv, void
*priv_sta);
/* debugfs */
int minstrel_stats_open(struct inode *inode, struct file *file);
+int minstrel_stats_csv_open(struct inode *inode, struct file *file);
ssize_t minstrel_stats_read(struct file *file, char __user *buf, size_t len,
loff_t *ppos);
int minstrel_stats_release(struct inode *inode, struct file *file);
diff --git a/net/mac80211/rc80211_minstrel_debugfs.c
b/net/mac80211/rc80211_minstrel_debugfs.c
index 2d70081..8c35402 100644
--- a/net/mac80211/rc80211_minstrel_debugfs.c
+++ b/net/mac80211/rc80211_minstrel_debugfs.c
@@ -54,6 +54,22 @@
#include <net/mac80211.h>
#include "rc80211_minstrel.h"
+ssize_t
+minstrel_stats_read(struct file *file, char __user *buf, size_t len, loff_t
*ppos)
+{
+ struct minstrel_debugfs_info *ms;
+
+ ms = file->private_data;
+ return simple_read_from_buffer(buf, len, ppos, ms->buf, ms->len);
+}
+
+int
+minstrel_stats_release(struct inode *inode, struct file *file)
+{
+ kfree(file->private_data);
+ return 0;
+}
+
int
minstrel_stats_open(struct inode *inode, struct file *file)
{
@@ -115,25 +131,76 @@ minstrel_stats_open(struct inode *inode, struct file
*file)
return 0;
}
-ssize_t
-minstrel_stats_read(struct file *file, char __user *buf, size_t len, loff_t
*ppos)
+static const struct file_operations minstrel_stat_fops = {
+ .owner = THIS_MODULE,
+ .open = minstrel_stats_open,
+ .read = minstrel_stats_read,
+ .release = minstrel_stats_release,
+ .llseek = default_llseek,
+};
+
+int
+minstrel_stats_csv_open(struct inode *inode, struct file *file)
{
+ struct minstrel_sta_info *mi = inode->i_private;
struct minstrel_debugfs_info *ms;
+ struct timeval tv;
+ unsigned int i, tp, prob, eprob;
+ char *p;
- ms = file->private_data;
- return simple_read_from_buffer(buf, len, ppos, ms->buf, ms->len);
-}
+ ms = kmalloc(2048, GFP_KERNEL);
+ if (!ms)
+ return -ENOMEM;
+
+ file->private_data = ms;
+ p = ms->buf;
+
+ do_gettimeofday(&tv);
+
+ for (i = 0; i < mi->n_rates; i++) {
+ struct minstrel_rate *mr = &mi->r[i];
+ struct minstrel_rate_stats *mrs = &mi->r[i].stats;
+
+ p += sprintf(p, "%ld.%.6ld,", tv.tv_sec, tv.tv_usec);
+ p += sprintf(p, "%s" ,((i == mi->max_tp_rate[0]) ? "A" : ""));
+ p += sprintf(p, "%s" ,((i == mi->max_tp_rate[1]) ? "B" : ""));
+ p += sprintf(p, "%s" ,((i == mi->max_tp_rate[2]) ? "C" : ""));
+ p += sprintf(p, "%s" ,((i == mi->max_tp_rate[3]) ? "D" : ""));
+ p += sprintf(p, "%s" ,((i == mi->max_prob_rate) ? "P" : ""));
+
+ p += sprintf(p, ",%u%s", mr->bitrate / 2,
+ (mr->bitrate & 1 ? ".5," : ","));
+ p += sprintf(p, "%u,", i);
+ p += sprintf(p, "%u,",mr->perfect_tx_time);
+
+ tp = MINSTREL_TRUNC(mrs->cur_tp / 10);
+ prob = MINSTREL_TRUNC(mrs->cur_prob * 1000);
+ eprob = MINSTREL_TRUNC(mrs->probability * 1000);
+
+ p += sprintf(p, "%u.%u,%u.%u,%u.%u,%u,%u,%u,"
+ "%llu,%llu,%d,%d\n",
+ tp / 10, tp % 10,
+ eprob / 10, eprob % 10,
+ prob / 10, prob % 10,
+ mrs->retry_count,
+ mrs->last_success,
+ mrs->last_attempts,
+ (unsigned long long)mrs->succ_hist,
+ (unsigned long long)mrs->att_hist,
+ mi->total_packets - mi->sample_packets,
+ mi->sample_packets);
+
+ }
+ ms->len = p - ms->buf;
+
+ WARN_ON(ms->len + sizeof(*ms) > 2048);
-int
-minstrel_stats_release(struct inode *inode, struct file *file)
-{
- kfree(file->private_data);
return 0;
}
-static const struct file_operations minstrel_stat_fops = {
+static const struct file_operations minstrel_stat_csv_fops = {
.owner = THIS_MODULE,
- .open = minstrel_stats_open,
+ .open = minstrel_stats_csv_open,
.read = minstrel_stats_read,
.release = minstrel_stats_release,
.llseek = default_llseek,
@@ -146,6 +213,9 @@ minstrel_add_sta_debugfs(void *priv, void *priv_sta, struct
dentry *dir)
mi->dbg_stats = debugfs_create_file("rc_stats", S_IRUGO, dir, mi,
&minstrel_stat_fops);
+
+ mi->dbg_stats_csv = debugfs_create_file("rc_stats_csv", S_IRUGO, dir,
+ mi, &minstrel_stat_csv_fops);
}
void
@@ -154,4 +224,7 @@ minstrel_remove_sta_debugfs(void *priv, void *priv_sta)
struct minstrel_sta_info *mi = priv_sta;
debugfs_remove(mi->dbg_stats);
+
+ debugfs_remove(mi->dbg_stats_csv);
}
+
--
2.3.0
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