Johannes Berg | 3d23e34 | 2009-09-29 23:27:28 +0200 | [diff] [blame] | 1 | /* |
| 2 | * This file implement the Wireless Extensions proc API. |
| 3 | * |
| 4 | * Authors : Jean Tourrilhes - HPL - <jt@hpl.hp.com> |
| 5 | * Copyright (c) 1997-2007 Jean Tourrilhes, All Rights Reserved. |
| 6 | * |
| 7 | * (As all part of the Linux kernel, this file is GPL) |
| 8 | */ |
| 9 | |
| 10 | /* |
| 11 | * The /proc/net/wireless file is a human readable user-space interface |
| 12 | * exporting various wireless specific statistics from the wireless devices. |
| 13 | * This is the most popular part of the Wireless Extensions ;-) |
| 14 | * |
| 15 | * This interface is a pure clone of /proc/net/dev (in net/core/dev.c). |
| 16 | * The content of the file is basically the content of "struct iw_statistics". |
| 17 | */ |
| 18 | |
| 19 | #include <linux/module.h> |
| 20 | #include <linux/proc_fs.h> |
| 21 | #include <linux/seq_file.h> |
| 22 | #include <linux/wireless.h> |
| 23 | #include <linux/netdevice.h> |
| 24 | #include <linux/rtnetlink.h> |
| 25 | #include <net/iw_handler.h> |
| 26 | #include <net/wext.h> |
| 27 | |
| 28 | |
| 29 | static void wireless_seq_printf_stats(struct seq_file *seq, |
| 30 | struct net_device *dev) |
| 31 | { |
| 32 | /* Get stats from the driver */ |
| 33 | struct iw_statistics *stats = get_wireless_stats(dev); |
| 34 | static struct iw_statistics nullstats = {}; |
| 35 | |
| 36 | /* show device if it's wireless regardless of current stats */ |
| 37 | if (!stats) { |
| 38 | #ifdef CONFIG_WIRELESS_EXT |
| 39 | if (dev->wireless_handlers) |
| 40 | stats = &nullstats; |
| 41 | #endif |
| 42 | #ifdef CONFIG_CFG80211 |
| 43 | if (dev->ieee80211_ptr) |
| 44 | stats = &nullstats; |
| 45 | #endif |
| 46 | } |
| 47 | |
| 48 | if (stats) { |
| 49 | seq_printf(seq, "%6s: %04x %3d%c %3d%c %3d%c %6d %6d %6d " |
| 50 | "%6d %6d %6d\n", |
| 51 | dev->name, stats->status, stats->qual.qual, |
| 52 | stats->qual.updated & IW_QUAL_QUAL_UPDATED |
| 53 | ? '.' : ' ', |
| 54 | ((__s32) stats->qual.level) - |
| 55 | ((stats->qual.updated & IW_QUAL_DBM) ? 0x100 : 0), |
| 56 | stats->qual.updated & IW_QUAL_LEVEL_UPDATED |
| 57 | ? '.' : ' ', |
| 58 | ((__s32) stats->qual.noise) - |
| 59 | ((stats->qual.updated & IW_QUAL_DBM) ? 0x100 : 0), |
| 60 | stats->qual.updated & IW_QUAL_NOISE_UPDATED |
| 61 | ? '.' : ' ', |
| 62 | stats->discard.nwid, stats->discard.code, |
| 63 | stats->discard.fragment, stats->discard.retries, |
| 64 | stats->discard.misc, stats->miss.beacon); |
| 65 | |
| 66 | if (stats != &nullstats) |
| 67 | stats->qual.updated &= ~IW_QUAL_ALL_UPDATED; |
| 68 | } |
| 69 | } |
| 70 | |
| 71 | /* ---------------------------------------------------------------- */ |
| 72 | /* |
| 73 | * Print info for /proc/net/wireless (print all entries) |
| 74 | */ |
| 75 | static int wireless_dev_seq_show(struct seq_file *seq, void *v) |
| 76 | { |
| 77 | might_sleep(); |
| 78 | |
| 79 | if (v == SEQ_START_TOKEN) |
| 80 | seq_printf(seq, "Inter-| sta-| Quality | Discarded " |
| 81 | "packets | Missed | WE\n" |
| 82 | " face | tus | link level noise | nwid " |
| 83 | "crypt frag retry misc | beacon | %d\n", |
| 84 | WIRELESS_EXT); |
| 85 | else |
| 86 | wireless_seq_printf_stats(seq, v); |
| 87 | return 0; |
| 88 | } |
| 89 | |
| 90 | static void *wireless_dev_seq_start(struct seq_file *seq, loff_t *pos) |
| 91 | { |
| 92 | struct net *net = seq_file_net(seq); |
| 93 | loff_t off; |
| 94 | struct net_device *dev; |
| 95 | |
| 96 | rtnl_lock(); |
| 97 | if (!*pos) |
| 98 | return SEQ_START_TOKEN; |
| 99 | |
| 100 | off = 1; |
| 101 | for_each_netdev(net, dev) |
| 102 | if (off++ == *pos) |
| 103 | return dev; |
| 104 | return NULL; |
| 105 | } |
| 106 | |
| 107 | static void *wireless_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
| 108 | { |
| 109 | struct net *net = seq_file_net(seq); |
| 110 | |
| 111 | ++*pos; |
| 112 | |
| 113 | return v == SEQ_START_TOKEN ? |
| 114 | first_net_device(net) : next_net_device(v); |
| 115 | } |
| 116 | |
| 117 | static void wireless_dev_seq_stop(struct seq_file *seq, void *v) |
| 118 | { |
| 119 | rtnl_unlock(); |
| 120 | } |
| 121 | |
| 122 | static const struct seq_operations wireless_seq_ops = { |
| 123 | .start = wireless_dev_seq_start, |
| 124 | .next = wireless_dev_seq_next, |
| 125 | .stop = wireless_dev_seq_stop, |
| 126 | .show = wireless_dev_seq_show, |
| 127 | }; |
| 128 | |
| 129 | static int seq_open_wireless(struct inode *inode, struct file *file) |
| 130 | { |
| 131 | return seq_open_net(inode, file, &wireless_seq_ops, |
| 132 | sizeof(struct seq_net_private)); |
| 133 | } |
| 134 | |
| 135 | static const struct file_operations wireless_seq_fops = { |
| 136 | .owner = THIS_MODULE, |
| 137 | .open = seq_open_wireless, |
| 138 | .read = seq_read, |
| 139 | .llseek = seq_lseek, |
| 140 | .release = seq_release_net, |
| 141 | }; |
| 142 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 143 | int __net_init wext_proc_init(struct net *net) |
Johannes Berg | 3d23e34 | 2009-09-29 23:27:28 +0200 | [diff] [blame] | 144 | { |
| 145 | /* Create /proc/net/wireless entry */ |
Gao feng | d4beaa6 | 2013-02-18 01:34:54 +0000 | [diff] [blame] | 146 | if (!proc_create("wireless", S_IRUGO, net->proc_net, |
| 147 | &wireless_seq_fops)) |
Johannes Berg | 3d23e34 | 2009-09-29 23:27:28 +0200 | [diff] [blame] | 148 | return -ENOMEM; |
| 149 | |
| 150 | return 0; |
| 151 | } |
| 152 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 153 | void __net_exit wext_proc_exit(struct net *net) |
Johannes Berg | 3d23e34 | 2009-09-29 23:27:28 +0200 | [diff] [blame] | 154 | { |
| 155 | proc_net_remove(net, "wireless"); |
| 156 | } |