156 lines
3.9 KiB
C
156 lines
3.9 KiB
C
/*
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* This file implement the Wireless Extensions proc API.
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*
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* Authors : Jean Tourrilhes - HPL - <jt@hpl.hp.com>
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* Copyright (c) 1997-2007 Jean Tourrilhes, All Rights Reserved.
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*
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* (As all part of the Linux kernel, this file is GPL)
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*/
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/*
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* The /proc/net/wireless file is a human readable user-space interface
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* exporting various wireless specific statistics from the wireless devices.
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* This is the most popular part of the Wireless Extensions ;-)
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*
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* This interface is a pure clone of /proc/net/dev (in net/core/dev.c).
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* The content of the file is basically the content of "struct iw_statistics".
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*/
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#include <linux/module.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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#include <linux/wireless.h>
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#include <linux/netdevice.h>
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#include <linux/rtnetlink.h>
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#include <net/iw_handler.h>
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#include <net/wext.h>
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static void wireless_seq_printf_stats(struct seq_file *seq,
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struct net_device *dev)
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{
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/* Get stats from the driver */
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struct iw_statistics *stats = get_wireless_stats(dev);
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static struct iw_statistics nullstats = {};
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/* show device if it's wireless regardless of current stats */
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if (!stats) {
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#ifdef CONFIG_WIRELESS_EXT
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if (dev->wireless_handlers)
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stats = &nullstats;
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#endif
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#ifdef CONFIG_CFG80211
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if (dev->ieee80211_ptr)
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stats = &nullstats;
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#endif
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}
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if (stats) {
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seq_printf(seq, "%6s: %04x %3d%c %3d%c %3d%c %6d %6d %6d "
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"%6d %6d %6d\n",
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dev->name, stats->status, stats->qual.qual,
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stats->qual.updated & IW_QUAL_QUAL_UPDATED
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? '.' : ' ',
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((__s32) stats->qual.level) -
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((stats->qual.updated & IW_QUAL_DBM) ? 0x100 : 0),
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stats->qual.updated & IW_QUAL_LEVEL_UPDATED
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? '.' : ' ',
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((__s32) stats->qual.noise) -
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((stats->qual.updated & IW_QUAL_DBM) ? 0x100 : 0),
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stats->qual.updated & IW_QUAL_NOISE_UPDATED
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? '.' : ' ',
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stats->discard.nwid, stats->discard.code,
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stats->discard.fragment, stats->discard.retries,
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stats->discard.misc, stats->miss.beacon);
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if (stats != &nullstats)
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stats->qual.updated &= ~IW_QUAL_ALL_UPDATED;
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}
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}
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/* ---------------------------------------------------------------- */
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/*
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* Print info for /proc/net/wireless (print all entries)
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*/
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static int wireless_dev_seq_show(struct seq_file *seq, void *v)
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{
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might_sleep();
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if (v == SEQ_START_TOKEN)
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seq_printf(seq, "Inter-| sta-| Quality | Discarded "
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"packets | Missed | WE\n"
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" face | tus | link level noise | nwid "
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"crypt frag retry misc | beacon | %d\n",
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WIRELESS_EXT);
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else
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wireless_seq_printf_stats(seq, v);
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return 0;
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}
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static void *wireless_dev_seq_start(struct seq_file *seq, loff_t *pos)
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{
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struct net *net = seq_file_net(seq);
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loff_t off;
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struct net_device *dev;
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rtnl_lock();
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if (!*pos)
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return SEQ_START_TOKEN;
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off = 1;
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for_each_netdev(net, dev)
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if (off++ == *pos)
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return dev;
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return NULL;
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}
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static void *wireless_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos)
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{
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struct net *net = seq_file_net(seq);
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++*pos;
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return v == SEQ_START_TOKEN ?
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first_net_device(net) : next_net_device(v);
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}
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static void wireless_dev_seq_stop(struct seq_file *seq, void *v)
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{
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rtnl_unlock();
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}
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static const struct seq_operations wireless_seq_ops = {
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.start = wireless_dev_seq_start,
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.next = wireless_dev_seq_next,
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.stop = wireless_dev_seq_stop,
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.show = wireless_dev_seq_show,
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};
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static int seq_open_wireless(struct inode *inode, struct file *file)
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{
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return seq_open_net(inode, file, &wireless_seq_ops,
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sizeof(struct seq_net_private));
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}
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static const struct file_operations wireless_seq_fops = {
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.owner = THIS_MODULE,
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.open = seq_open_wireless,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = seq_release_net,
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};
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int wext_proc_init(struct net *net)
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{
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/* Create /proc/net/wireless entry */
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if (!proc_net_fops_create(net, "wireless", S_IRUGO, &wireless_seq_fops))
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return -ENOMEM;
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return 0;
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}
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void wext_proc_exit(struct net *net)
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{
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proc_net_remove(net, "wireless");
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}
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