net/mac80211/rc80211_minstrel_debugfs.c

   1 /*
   2  * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  *
   8  * Based on minstrel.c:
   9  *   Copyright (C) 2005-2007 Derek Smithies <derek@indranet.co.nz>
  10  *   Sponsored by Indranet Technologies Ltd
  11  *
  12  * Based on sample.c:
  13  *   Copyright (c) 2005 John Bicket
  14  *   All rights reserved.
  15  *
  16  *   Redistribution and use in source and binary forms, with or without
  17  *   modification, are permitted provided that the following conditions
  18  *   are met:
  19  *   1. Redistributions of source code must retain the above copyright
  20  *      notice, this list of conditions and the following disclaimer,
  21  *      without modification.
  22  *   2. Redistributions in binary form must reproduce at minimum a disclaimer
  23  *      similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
  24  *      redistribution must be conditioned upon including a substantially
  25  *      similar Disclaimer requirement for further binary redistribution.
  26  *   3. Neither the names of the above-listed copyright holders nor the names
  27  *      of any contributors may be used to endorse or promote products derived
  28  *      from this software without specific prior written permission.
  29  *
  30  *   Alternatively, this software may be distributed under the terms of the
  31  *   GNU General Public License ("GPL") version 2 as published by the Free
  32  *   Software Foundation.
  33  *
  34  *   NO WARRANTY
  35  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  36  *   ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  37  *   LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
  38  *   AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
  39  *   THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
  40  *   OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  41  *   SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  42  *   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
  43  *   IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  44  *   ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  45  *   THE POSSIBILITY OF SUCH DAMAGES.
  46  */
  47 #include <linux/netdevice.h>
  48 #include <linux/types.h>
  49 #include <linux/skbuff.h>
  50 #include <linux/debugfs.h>
  51 #include <linux/ieee80211.h>
  52 #include <linux/slab.h>
  53 #include <linux/export.h>
  54 #include <net/mac80211.h>
  55 #include "rc80211_minstrel.h"
  56
  57 ssize_t
  58 minstrel_stats_read(struct file *file, char __user *buf, size_t len, loff_t *ppos)
  59 {
  60         struct minstrel_debugfs_info *ms;
  61
  62         ms = file->private_data;
  63         return simple_read_from_buffer(buf, len, ppos, ms->buf, ms->len);
  64 }
  65
  66 int
  67 minstrel_stats_release(struct inode *inode, struct file *file)
  68 {
  69         kfree(file->private_data);
  70         return 0;
  71 }
  72
  73 int
  74 minstrel_stats_open(struct inode *inode, struct file *file)
  75 {
  76         struct minstrel_sta_info *mi = inode->i_private;
  77         struct minstrel_debugfs_info *ms;
  78         unsigned int i, tp_max, tp_avg, prob, eprob;
  79         char *p;
  80
  81         ms = kmalloc(2048, GFP_KERNEL);
  82         if (!ms)
  83                 return -ENOMEM;
  84
  85         file->private_data = ms;
  86         p = ms->buf;
  87         p += sprintf(p, "\n");
  88         p += sprintf(p, "best   __________rate_________    ______"
  89                         "statistics______    ________last_______    "
  90                         "______sum-of________\n");
  91         p += sprintf(p, "rate  [name idx airtime max_tp]  [ ø(tp) ø(prob) "
  92                         "sd(prob)]  [prob.|retry|suc|att]  "
  93                         "[#success | #attempts]\n");
  94
  95         for (i = 0; i < mi->n_rates; i++) {
  96                 struct minstrel_rate *mr = &mi->r[i];
  97                 struct minstrel_rate_stats *mrs = &mi->r[i].stats;
  98
  99                 *(p++) = (i == mi->max_tp_rate[0]) ? 'A' : ' ';
 100                 *(p++) = (i == mi->max_tp_rate[1]) ? 'B' : ' ';
 101                 *(p++) = (i == mi->max_tp_rate[2]) ? 'C' : ' ';
 102                 *(p++) = (i == mi->max_tp_rate[3]) ? 'D' : ' ';
 103                 *(p++) = (i == mi->max_prob_rate) ? 'P' : ' ';
 104
 105                 p += sprintf(p, " %3u%s ", mr->bitrate / 2,
 106                                 (mr->bitrate & 1 ? ".5" : "  "));
 107                 p += sprintf(p, "%3u  ", i);
 108                 p += sprintf(p, "%6u ", mr->perfect_tx_time);
 109
 110                 tp_max = minstrel_get_tp_avg(mr, MINSTREL_FRAC(100,100));
 111                 tp_avg = minstrel_get_tp_avg(mr, mrs->prob_ewma);
 112                 prob = MINSTREL_TRUNC(mrs->cur_prob * 1000);
 113                 eprob = MINSTREL_TRUNC(mrs->prob_ewma * 1000);
 114
 115                 p += sprintf(p, "%4u.%1u   %4u.%1u   %3u.%1u    %3u.%1u"
 116                                 "     %3u.%1u %3u   %3u %-3u   "
 117                                 "%9llu   %-9llu\n",
 118                                 tp_max / 10, tp_max % 10,
 119                                 tp_avg / 10, tp_avg % 10,
 120                                 eprob / 10, eprob % 10,
 121                                 mrs->prob_ewmsd / 10, mrs->prob_ewmsd % 10,
 122                                 prob / 10, prob % 10,
 123                                 mrs->retry_count,
 124                                 mrs->last_success,
 125                                 mrs->last_attempts,
 126                                 (unsigned long long)mrs->succ_hist,
 127                                 (unsigned long long)mrs->att_hist);
 128         }
 129         p += sprintf(p, "\nTotal packet count::    ideal %d      "
 130                         "lookaround %d\n\n",
 131                         mi->total_packets - mi->sample_packets,
 132                         mi->sample_packets);
 133         ms->len = p - ms->buf;
 134
 135         WARN_ON(ms->len + sizeof(*ms) > 2048);
 136
 137         return 0;
 138 }
 139
 140 static const struct file_operations minstrel_stat_fops = {
 141         .owner = THIS_MODULE,
 142         .open = minstrel_stats_open,
 143         .read = minstrel_stats_read,
 144         .release = minstrel_stats_release,
 145         .llseek = default_llseek,
 146 };
 147
 148 int
 149 minstrel_stats_csv_open(struct inode *inode, struct file *file)
 150 {
 151         struct minstrel_sta_info *mi = inode->i_private;
 152         struct minstrel_debugfs_info *ms;
 153         unsigned int i, tp_max, tp_avg, prob, eprob;
 154         char *p;
 155
 156         ms = kmalloc(2048, GFP_KERNEL);
 157         if (!ms)
 158                 return -ENOMEM;
 159
 160         file->private_data = ms;
 161         p = ms->buf;
 162
 163         for (i = 0; i < mi->n_rates; i++) {
 164                 struct minstrel_rate *mr = &mi->r[i];
 165                 struct minstrel_rate_stats *mrs = &mi->r[i].stats;
 166
 167                 p += sprintf(p, "%s" ,((i == mi->max_tp_rate[0]) ? "A" : ""));
 168                 p += sprintf(p, "%s" ,((i == mi->max_tp_rate[1]) ? "B" : ""));
 169                 p += sprintf(p, "%s" ,((i == mi->max_tp_rate[2]) ? "C" : ""));
 170                 p += sprintf(p, "%s" ,((i == mi->max_tp_rate[3]) ? "D" : ""));
 171                 p += sprintf(p, "%s" ,((i == mi->max_prob_rate) ? "P" : ""));
 172
 173                 p += sprintf(p, ",%u%s", mr->bitrate / 2,
 174                                 (mr->bitrate & 1 ? ".5," : ","));
 175                 p += sprintf(p, "%u,", i);
 176                 p += sprintf(p, "%u,",mr->perfect_tx_time);
 177
 178                 tp_max = minstrel_get_tp_avg(mr, MINSTREL_FRAC(100,100));
 179                 tp_avg = minstrel_get_tp_avg(mr, mrs->prob_ewma);
 180                 prob = MINSTREL_TRUNC(mrs->cur_prob * 1000);
 181                 eprob = MINSTREL_TRUNC(mrs->prob_ewma * 1000);
 182
 183                 p += sprintf(p, "%u.%u,%u.%u,%u.%u,%u.%u,%u.%u,%u,%u,%u,"
 184                                 "%llu,%llu,%d,%d\n",
 185                                 tp_max / 10, tp_max % 10,
 186                                 tp_avg / 10, tp_avg % 10,
 187                                 eprob / 10, eprob % 10,
 188                                 mrs->prob_ewmsd / 10, mrs->prob_ewmsd % 10,
 189                                 prob / 10, prob % 10,
 190                                 mrs->retry_count,
 191                                 mrs->last_success,
 192                                 mrs->last_attempts,
 193                                 (unsigned long long)mrs->succ_hist,
 194                                 (unsigned long long)mrs->att_hist,
 195                                 mi->total_packets - mi->sample_packets,
 196                                 mi->sample_packets);
 197
 198         }
 199         ms->len = p - ms->buf;
 200
 201         WARN_ON(ms->len + sizeof(*ms) > 2048);
 202
 203         return 0;
 204 }
 205
 206 static const struct file_operations minstrel_stat_csv_fops = {
 207         .owner = THIS_MODULE,
 208         .open = minstrel_stats_csv_open,
 209         .read = minstrel_stats_read,
 210         .release = minstrel_stats_release,
 211         .llseek = default_llseek,
 212 };
 213
 214 void
 215 minstrel_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir)
 216 {
 217         struct minstrel_sta_info *mi = priv_sta;
 218
 219         mi->dbg_stats = debugfs_create_file("rc_stats", S_IRUGO, dir, mi,
 220                         &minstrel_stat_fops);
 221
 222         mi->dbg_stats_csv = debugfs_create_file("rc_stats_csv", S_IRUGO, dir,
 223                         mi, &minstrel_stat_csv_fops);
 224 }
 225
 226 void
 227 minstrel_remove_sta_debugfs(void *priv, void *priv_sta)
 228 {
 229         struct minstrel_sta_info *mi = priv_sta;
 230
 231         debugfs_remove(mi->dbg_stats);
 232
 233         debugfs_remove(mi->dbg_stats_csv);
 234 }