164 lines
4.9 KiB
C
164 lines
4.9 KiB
C
/*
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* Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Based on minstrel.c:
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* Copyright (C) 2005-2007 Derek Smithies <derek@indranet.co.nz>
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* Sponsored by Indranet Technologies Ltd
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*
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* Based on sample.c:
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* Copyright (c) 2005 John Bicket
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
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* redistribution must be conditioned upon including a substantially
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* similar Disclaimer requirement for further binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
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* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
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* IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGES.
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*/
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#include <linux/netdevice.h>
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#include <linux/types.h>
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#include <linux/skbuff.h>
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#include <linux/debugfs.h>
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#include <linux/ieee80211.h>
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#include <net/mac80211.h>
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#include "rc80211_minstrel.h"
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struct minstrel_stats_info {
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struct minstrel_sta_info *mi;
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char buf[4096];
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size_t len;
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};
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static int
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minstrel_stats_open(struct inode *inode, struct file *file)
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{
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struct minstrel_sta_info *mi = inode->i_private;
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struct minstrel_stats_info *ms;
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unsigned int i, tp, prob, eprob;
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char *p;
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ms = kmalloc(sizeof(*ms), GFP_KERNEL);
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if (!ms)
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return -ENOMEM;
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file->private_data = ms;
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p = ms->buf;
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p += sprintf(p, "rate throughput ewma prob this prob "
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"this succ/attempt success attempts\n");
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for (i = 0; i < mi->n_rates; i++) {
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struct minstrel_rate *mr = &mi->r[i];
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*(p++) = (i == mi->max_tp_rate) ? 'T' : ' ';
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*(p++) = (i == mi->max_tp_rate2) ? 't' : ' ';
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*(p++) = (i == mi->max_prob_rate) ? 'P' : ' ';
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p += sprintf(p, "%3u%s", mr->bitrate / 2,
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(mr->bitrate & 1 ? ".5" : " "));
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tp = ((mr->cur_tp * 96) / 18000) >> 10;
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prob = mr->cur_prob / 18;
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eprob = mr->probability / 18;
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p += sprintf(p, " %6u.%1u %6u.%1u %6u.%1u "
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"%3u(%3u) %8llu %8llu\n",
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tp / 10, tp % 10,
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eprob / 10, eprob % 10,
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prob / 10, prob % 10,
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mr->last_success,
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mr->last_attempts,
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(unsigned long long)mr->succ_hist,
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(unsigned long long)mr->att_hist);
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}
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p += sprintf(p, "\nTotal packet count:: ideal %d "
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"lookaround %d\n\n",
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mi->packet_count - mi->sample_count,
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mi->sample_count);
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ms->len = p - ms->buf;
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return 0;
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}
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static ssize_t
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minstrel_stats_read(struct file *file, char __user *buf, size_t len, loff_t *o)
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{
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struct minstrel_stats_info *ms;
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char *src;
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ms = file->private_data;
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src = ms->buf;
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len = min(len, ms->len);
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if (len <= *o)
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return 0;
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src += *o;
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len -= *o;
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*o += len;
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if (copy_to_user(buf, src, len))
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return -EFAULT;
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return len;
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}
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static int
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minstrel_stats_release(struct inode *inode, struct file *file)
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{
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struct minstrel_stats_info *ms = file->private_data;
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kfree(ms);
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return 0;
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}
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static struct file_operations minstrel_stat_fops = {
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.owner = THIS_MODULE,
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.open = minstrel_stats_open,
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.read = minstrel_stats_read,
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.release = minstrel_stats_release,
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};
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void
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minstrel_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir)
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{
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struct minstrel_sta_info *mi = priv_sta;
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mi->dbg_stats = debugfs_create_file("rc_stats", S_IRUGO, dir, mi,
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&minstrel_stat_fops);
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}
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void
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minstrel_remove_sta_debugfs(void *priv, void *priv_sta)
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{
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struct minstrel_sta_info *mi = priv_sta;
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debugfs_remove(mi->dbg_stats);
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}
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