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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 <net/mac80211.h> |
54 | #include "rc80211_minstrel.h" |
55 | |
56 | struct minstrel_stats_info { |
57 | struct minstrel_sta_info *mi; |
58 | char buf[4096]; |
59 | size_t len; |
60 | }; |
61 | |
62 | static int |
63 | minstrel_stats_open(struct inode *inode, struct file *file) |
64 | { |
65 | struct minstrel_sta_info *mi = inode->i_private; |
66 | struct minstrel_stats_info *ms; |
67 | unsigned int i, tp, prob, eprob; |
68 | char *p; |
69 | |
70 | ms = kmalloc(sizeof(*ms), GFP_KERNEL); |
71 | if (!ms) |
72 | return -ENOMEM; |
73 | |
74 | file->private_data = ms; |
75 | p = ms->buf; |
76 | p += sprintf(p, "rate throughput ewma prob this prob " |
77 | "this succ/attempt success attempts\n"); |
78 | for (i = 0; i < mi->n_rates; i++) { |
79 | struct minstrel_rate *mr = &mi->r[i]; |
80 | |
81 | *(p++) = (i == mi->max_tp_rate) ? 'T' : ' '; |
82 | *(p++) = (i == mi->max_tp_rate2) ? 't' : ' '; |
83 | *(p++) = (i == mi->max_prob_rate) ? 'P' : ' '; |
84 | p += sprintf(p, "%3u%s", mr->bitrate / 2, |
85 | (mr->bitrate & 1 ? ".5" : " ")); |
86 | |
87 | tp = mr->cur_tp / ((18000 << 10) / 96); |
88 | prob = mr->cur_prob / 18; |
89 | eprob = mr->probability / 18; |
90 | |
91 | p += sprintf(p, " %6u.%1u %6u.%1u %6u.%1u " |
92 | "%3u(%3u) %8llu %8llu\n", |
93 | tp / 10, tp % 10, |
94 | eprob / 10, eprob % 10, |
95 | prob / 10, prob % 10, |
96 | mr->last_success, |
97 | mr->last_attempts, |
98 | (unsigned long long)mr->succ_hist, |
99 | (unsigned long long)mr->att_hist); |
100 | } |
101 | p += sprintf(p, "\nTotal packet count:: ideal %d " |
102 | "lookaround %d\n\n", |
103 | mi->packet_count - mi->sample_count, |
104 | mi->sample_count); |
105 | ms->len = p - ms->buf; |
106 | |
107 | return 0; |
108 | } |
109 | |
110 | static ssize_t |
111 | minstrel_stats_read(struct file *file, char __user *buf, size_t len, loff_t *o) |
112 | { |
113 | struct minstrel_stats_info *ms; |
114 | char *src; |
115 | |
116 | ms = file->private_data; |
117 | src = ms->buf; |
118 | |
119 | len = min(len, ms->len); |
120 | if (len <= *o) |
121 | return 0; |
122 | |
123 | src += *o; |
124 | len -= *o; |
125 | *o += len; |
126 | |
127 | if (copy_to_user(buf, src, len)) |
128 | return -EFAULT; |
129 | |
130 | return len; |
131 | } |
132 | |
133 | static int |
134 | minstrel_stats_release(struct inode *inode, struct file *file) |
135 | { |
136 | struct minstrel_stats_info *ms = file->private_data; |
137 | |
138 | kfree(ms); |
139 | |
140 | return 0; |
141 | } |
142 | |
143 | static const struct file_operations minstrel_stat_fops = { |
144 | .owner = THIS_MODULE, |
145 | .open = minstrel_stats_open, |
146 | .read = minstrel_stats_read, |
147 | .release = minstrel_stats_release, |
148 | }; |
149 | |
150 | void |
151 | minstrel_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir) |
152 | { |
153 | struct minstrel_sta_info *mi = priv_sta; |
154 | |
155 | mi->dbg_stats = debugfs_create_file("rc_stats", S_IRUGO, dir, mi, |
156 | &minstrel_stat_fops); |
157 | } |
158 | |
159 | void |
160 | minstrel_remove_sta_debugfs(void *priv, void *priv_sta) |
161 | { |
162 | struct minstrel_sta_info *mi = priv_sta; |
163 | |
164 | debugfs_remove(mi->dbg_stats); |
165 | } |
166 |
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9