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