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35de87bf59
Add SPDX-License-Identifier lines to some files where they are missing in the net/wireless directory. Remove licensing text from individual files headers (where present) to canonicalize the library references. Use (mostly) either GPL-2.0 or ISC, depending on the license wording (or not) in the files. radiotap.c does not mention which BSD variant it intends for the license. My selection of 'OR BSD-2-Clause' for radiotap.c was based on research into this code's history and its licensing elsewhere. In OpenBSD, radiotap code (which likely either derived from this code, or this code was derived from) has the BSD-2-Clause license. Very similar code in the radiotap library user space tool, by the same authors Andy Green and Johannes Berg, has an ISC license. Also the ISC license is used by Johannes for other contributions in the Linux wireless system. Since the radiotap.c license text here mentions BSD, but not a specific version, I chose the closest BSD variant to ISC, which is BSD-2-Clause. Signed-off-by: Tim Bird <tim.bird@sony.com> Link: https://patch.msgid.link/20260305220422.24161-1-tim.bird@sony.com [modify subject since it's not all radiotap] Signed-off-by: Johannes Berg <johannes.berg@intel.com>
142 lines
3.6 KiB
C
142 lines
3.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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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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/*
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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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int __net_init 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_create_net("wireless", 0444, net->proc_net,
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&wireless_seq_ops, sizeof(struct seq_net_private)))
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return -ENOMEM;
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return 0;
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}
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void __net_exit wext_proc_exit(struct net *net)
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{
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remove_proc_entry("wireless", net->proc_net);
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}
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