diff options
Diffstat (limited to 'net/wireless/wext-proc.c')
| -rw-r--r-- | net/wireless/wext-proc.c | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/net/wireless/wext-proc.c b/net/wireless/wext-proc.c new file mode 100644 index 00000000000..273a7f77c83 --- /dev/null +++ b/net/wireless/wext-proc.c @@ -0,0 +1,155 @@ +/* + * 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 CONFIG_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 wext_proc_init(struct net *net) +{ + /* Create /proc/net/wireless entry */ + if (!proc_net_fops_create(net, "wireless", S_IRUGO, &wireless_seq_fops)) + return -ENOMEM; + + return 0; +} + +void wext_proc_exit(struct net *net) +{ + proc_net_remove(net, "wireless"); +} |