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TOMOYO Linux Cross Reference
Linux/net/mac80211/rc80211_minstrel_debugfs.c

Version: ~ [ linux-5.6-rc7 ] ~ [ linux-5.5.11 ] ~ [ linux-5.4.27 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.112 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.174 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.217 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.217 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.82 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-3.9.11 ] ~ [ linux-3.8.13 ] ~ [ linux-3.7.10 ] ~ [ linux-3.6.11 ] ~ [ linux-3.5.7 ] ~ [ linux-3.4.113 ] ~ [ linux-3.3.8 ] ~ [ linux-3.2.102 ] ~ [ linux-3.1.10 ] ~ [ linux-3.0.101 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
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  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,
 89                      "best   __________rate_________    ________statistics________    ________last_______    ______sum-of________\n");
 90         p += sprintf(p,
 91                      "rate  [name idx airtime max_tp]  [avg(tp) avg(prob) sd(prob)]  [prob.|retry|suc|att]  [#success | #attempts]\n");
 92 
 93         for (i = 0; i < mi->n_rates; i++) {
 94                 struct minstrel_rate *mr = &mi->r[i];
 95                 struct minstrel_rate_stats *mrs = &mi->r[i].stats;
 96 
 97                 *(p++) = (i == mi->max_tp_rate[0]) ? 'A' : ' ';
 98                 *(p++) = (i == mi->max_tp_rate[1]) ? 'B' : ' ';
 99                 *(p++) = (i == mi->max_tp_rate[2]) ? 'C' : ' ';
100                 *(p++) = (i == mi->max_tp_rate[3]) ? 'D' : ' ';
101                 *(p++) = (i == mi->max_prob_rate) ? 'P' : ' ';
102 
103                 p += sprintf(p, " %3u%s ", mr->bitrate / 2,
104                                 (mr->bitrate & 1 ? ".5" : "  "));
105                 p += sprintf(p, "%3u  ", i);
106                 p += sprintf(p, "%6u ", mr->perfect_tx_time);
107 
108                 tp_max = minstrel_get_tp_avg(mr, MINSTREL_FRAC(100,100));
109                 tp_avg = minstrel_get_tp_avg(mr, mrs->prob_ewma);
110                 prob = MINSTREL_TRUNC(mrs->cur_prob * 1000);
111                 eprob = MINSTREL_TRUNC(mrs->prob_ewma * 1000);
112 
113                 p += sprintf(p, "%4u.%1u    %4u.%1u     %3u.%1u    %3u.%1u"
114                                 "     %3u.%1u %3u   %3u %-3u   "
115                                 "%9llu   %-9llu\n",
116                                 tp_max / 10, tp_max % 10,
117                                 tp_avg / 10, tp_avg % 10,
118                                 eprob / 10, eprob % 10,
119                                 mrs->prob_ewmsd / 10, mrs->prob_ewmsd % 10,
120                                 prob / 10, prob % 10,
121                                 mrs->retry_count,
122                                 mrs->last_success,
123                                 mrs->last_attempts,
124                                 (unsigned long long)mrs->succ_hist,
125                                 (unsigned long long)mrs->att_hist);
126         }
127         p += sprintf(p, "\nTotal packet count::    ideal %d      "
128                         "lookaround %d\n\n",
129                         mi->total_packets - mi->sample_packets,
130                         mi->sample_packets);
131         ms->len = p - ms->buf;
132 
133         WARN_ON(ms->len + sizeof(*ms) > 2048);
134 
135         return 0;
136 }
137 
138 static const struct file_operations minstrel_stat_fops = {
139         .owner = THIS_MODULE,
140         .open = minstrel_stats_open,
141         .read = minstrel_stats_read,
142         .release = minstrel_stats_release,
143         .llseek = default_llseek,
144 };
145 
146 int
147 minstrel_stats_csv_open(struct inode *inode, struct file *file)
148 {
149         struct minstrel_sta_info *mi = inode->i_private;
150         struct minstrel_debugfs_info *ms;
151         unsigned int i, tp_max, tp_avg, prob, eprob;
152         char *p;
153 
154         ms = kmalloc(2048, GFP_KERNEL);
155         if (!ms)
156                 return -ENOMEM;
157 
158         file->private_data = ms;
159         p = ms->buf;
160 
161         for (i = 0; i < mi->n_rates; i++) {
162                 struct minstrel_rate *mr = &mi->r[i];
163                 struct minstrel_rate_stats *mrs = &mi->r[i].stats;
164 
165                 p += sprintf(p, "%s" ,((i == mi->max_tp_rate[0]) ? "A" : ""));
166                 p += sprintf(p, "%s" ,((i == mi->max_tp_rate[1]) ? "B" : ""));
167                 p += sprintf(p, "%s" ,((i == mi->max_tp_rate[2]) ? "C" : ""));
168                 p += sprintf(p, "%s" ,((i == mi->max_tp_rate[3]) ? "D" : ""));
169                 p += sprintf(p, "%s" ,((i == mi->max_prob_rate) ? "P" : ""));
170 
171                 p += sprintf(p, ",%u%s", mr->bitrate / 2,
172                                 (mr->bitrate & 1 ? ".5," : ","));
173                 p += sprintf(p, "%u,", i);
174                 p += sprintf(p, "%u,",mr->perfect_tx_time);
175 
176                 tp_max = minstrel_get_tp_avg(mr, MINSTREL_FRAC(100,100));
177                 tp_avg = minstrel_get_tp_avg(mr, mrs->prob_ewma);
178                 prob = MINSTREL_TRUNC(mrs->cur_prob * 1000);
179                 eprob = MINSTREL_TRUNC(mrs->prob_ewma * 1000);
180 
181                 p += sprintf(p, "%u.%u,%u.%u,%u.%u,%u.%u,%u.%u,%u,%u,%u,"
182                                 "%llu,%llu,%d,%d\n",
183                                 tp_max / 10, tp_max % 10,
184                                 tp_avg / 10, tp_avg % 10,
185                                 eprob / 10, eprob % 10,
186                                 mrs->prob_ewmsd / 10, mrs->prob_ewmsd % 10,
187                                 prob / 10, prob % 10,
188                                 mrs->retry_count,
189                                 mrs->last_success,
190                                 mrs->last_attempts,
191                                 (unsigned long long)mrs->succ_hist,
192                                 (unsigned long long)mrs->att_hist,
193                                 mi->total_packets - mi->sample_packets,
194                                 mi->sample_packets);
195 
196         }
197         ms->len = p - ms->buf;
198 
199         WARN_ON(ms->len + sizeof(*ms) > 2048);
200 
201         return 0;
202 }
203 
204 static const struct file_operations minstrel_stat_csv_fops = {
205         .owner = THIS_MODULE,
206         .open = minstrel_stats_csv_open,
207         .read = minstrel_stats_read,
208         .release = minstrel_stats_release,
209         .llseek = default_llseek,
210 };
211 
212 void
213 minstrel_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir)
214 {
215         struct minstrel_sta_info *mi = priv_sta;
216 
217         mi->dbg_stats = debugfs_create_file("rc_stats", S_IRUGO, dir, mi,
218                         &minstrel_stat_fops);
219 
220         mi->dbg_stats_csv = debugfs_create_file("rc_stats_csv", S_IRUGO, dir,
221                         mi, &minstrel_stat_csv_fops);
222 }
223 
224 void
225 minstrel_remove_sta_debugfs(void *priv, void *priv_sta)
226 {
227         struct minstrel_sta_info *mi = priv_sta;
228 
229         debugfs_remove(mi->dbg_stats);
230 
231         debugfs_remove(mi->dbg_stats_csv);
232 }
233 

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