mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-15 11:26:44 +07:00
96890d6252
/proc has been ignoring struct file_operations::owner field for 10 years.
Specifically, it started with commit 786d7e1612
("Fix rmmod/read/write races in /proc entries"). Notice the chunk where
inode->i_fop is initialized with proxy struct file_operations for
regular files:
- if (de->proc_fops)
- inode->i_fop = de->proc_fops;
+ if (de->proc_fops) {
+ if (S_ISREG(inode->i_mode))
+ inode->i_fop = &proc_reg_file_ops;
+ else
+ inode->i_fop = de->proc_fops;
+ }
VFS stopped pinning module at this point.
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
156 lines
3.9 KiB
C
156 lines
3.9 KiB
C
/*
|
|
* 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 = {
|
|
.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);
|
|
}
|