| /* |
| * This file implement the Wireless Extensions proc API. |
| * |
| * Authors : Jean Tourrilhes - HPL - <jt@hpl.hp.com> |
| * Copyright (c) 1997-2007 Jean Tourrilhes, All Rights Reserved. |
| * |
| * (As all part of the Linux kernel, this file is GPL) |
| */ |
| |
| /* |
| * The /proc/net/wireless file is a human readable user-space interface |
| * exporting various wireless specific statistics from the wireless devices. |
| * This is the most popular part of the Wireless Extensions ;-) |
| * |
| * This interface is a pure clone of /proc/net/dev (in net/core/dev.c). |
| * The content of the file is basically the content of "struct iw_statistics". |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/proc_fs.h> |
| #include <linux/seq_file.h> |
| #include <linux/wireless.h> |
| #include <linux/netdevice.h> |
| #include <linux/rtnetlink.h> |
| #include <net/iw_handler.h> |
| #include <net/wext.h> |
| |
| |
| static void wireless_seq_printf_stats(struct seq_file *seq, |
| struct net_device *dev) |
| { |
| /* Get stats from the driver */ |
| struct iw_statistics *stats = get_wireless_stats(dev); |
| static struct iw_statistics nullstats = {}; |
| |
| /* show device if it's wireless regardless of current stats */ |
| if (!stats) { |
| #ifdef CONFIG_WIRELESS_EXT |
| if (dev->wireless_handlers) |
| stats = &nullstats; |
| #endif |
| #ifdef CPTCFG_CFG80211 |
| if (dev->ieee80211_ptr) |
| stats = &nullstats; |
| #endif |
| } |
| |
| if (stats) { |
| seq_printf(seq, "%6s: %04x %3d%c %3d%c %3d%c %6d %6d %6d " |
| "%6d %6d %6d\n", |
| dev->name, stats->status, stats->qual.qual, |
| stats->qual.updated & IW_QUAL_QUAL_UPDATED |
| ? '.' : ' ', |
| ((__s32) stats->qual.level) - |
| ((stats->qual.updated & IW_QUAL_DBM) ? 0x100 : 0), |
| stats->qual.updated & IW_QUAL_LEVEL_UPDATED |
| ? '.' : ' ', |
| ((__s32) stats->qual.noise) - |
| ((stats->qual.updated & IW_QUAL_DBM) ? 0x100 : 0), |
| stats->qual.updated & IW_QUAL_NOISE_UPDATED |
| ? '.' : ' ', |
| stats->discard.nwid, stats->discard.code, |
| stats->discard.fragment, stats->discard.retries, |
| stats->discard.misc, stats->miss.beacon); |
| |
| if (stats != &nullstats) |
| stats->qual.updated &= ~IW_QUAL_ALL_UPDATED; |
| } |
| } |
| |
| /* ---------------------------------------------------------------- */ |
| /* |
| * Print info for /proc/net/wireless (print all entries) |
| */ |
| static int wireless_dev_seq_show(struct seq_file *seq, void *v) |
| { |
| might_sleep(); |
| |
| if (v == SEQ_START_TOKEN) |
| seq_printf(seq, "Inter-| sta-| Quality | Discarded " |
| "packets | Missed | WE\n" |
| " face | tus | link level noise | nwid " |
| "crypt frag retry misc | beacon | %d\n", |
| WIRELESS_EXT); |
| else |
| wireless_seq_printf_stats(seq, v); |
| return 0; |
| } |
| |
| static void *wireless_dev_seq_start(struct seq_file *seq, loff_t *pos) |
| { |
| struct net *net = seq_file_net(seq); |
| loff_t off; |
| struct net_device *dev; |
| |
| rtnl_lock(); |
| if (!*pos) |
| return SEQ_START_TOKEN; |
| |
| off = 1; |
| for_each_netdev(net, dev) |
| if (off++ == *pos) |
| return dev; |
| return NULL; |
| } |
| |
| static void *wireless_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
| { |
| struct net *net = seq_file_net(seq); |
| |
| ++*pos; |
| |
| return v == SEQ_START_TOKEN ? |
| first_net_device(net) : next_net_device(v); |
| } |
| |
| static void wireless_dev_seq_stop(struct seq_file *seq, void *v) |
| { |
| rtnl_unlock(); |
| } |
| |
| static const struct seq_operations wireless_seq_ops = { |
| .start = wireless_dev_seq_start, |
| .next = wireless_dev_seq_next, |
| .stop = wireless_dev_seq_stop, |
| .show = wireless_dev_seq_show, |
| }; |
| |
| static int seq_open_wireless(struct inode *inode, struct file *file) |
| { |
| return seq_open_net(inode, file, &wireless_seq_ops, |
| sizeof(struct seq_net_private)); |
| } |
| |
| static const struct file_operations wireless_seq_fops = { |
| .owner = THIS_MODULE, |
| .open = seq_open_wireless, |
| .read = seq_read, |
| .llseek = seq_lseek, |
| .release = seq_release_net, |
| }; |
| |
| int __net_init wext_proc_init(struct net *net) |
| { |
| /* Create /proc/net/wireless entry */ |
| if (!proc_create("wireless", S_IRUGO, net->proc_net, |
| &wireless_seq_fops)) |
| return -ENOMEM; |
| |
| return 0; |
| } |
| |
| void __net_exit wext_proc_exit(struct net *net) |
| { |
| remove_proc_entry("wireless", net->proc_net); |
| } |