![Linus Torvalds](/assets/img/avatar_default.png)
This was entirely automated, using the script by Al: PATT='^[[:blank:]]*#[[:blank:]]*include[[:blank:]]*<asm/uaccess.h>' sed -i -e "s!$PATT!#include <linux/uaccess.h>!" \ $(git grep -l "$PATT"|grep -v ^include/linux/uaccess.h) to do the replacement at the end of the merge window. Requested-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
222 lines
4.8 KiB
C
222 lines
4.8 KiB
C
/*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
|
|
*/
|
|
|
|
#include <linux/capability.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/types.h>
|
|
#include <linux/socket.h>
|
|
#include <linux/in.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/timer.h>
|
|
#include <linux/string.h>
|
|
#include <linux/sockios.h>
|
|
#include <linux/net.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/slab.h>
|
|
#include <net/ax25.h>
|
|
#include <linux/inet.h>
|
|
#include <linux/netdevice.h>
|
|
#include <linux/if_arp.h>
|
|
#include <linux/skbuff.h>
|
|
#include <net/sock.h>
|
|
#include <linux/uaccess.h>
|
|
#include <linux/fcntl.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/list.h>
|
|
#include <linux/notifier.h>
|
|
#include <linux/proc_fs.h>
|
|
#include <linux/seq_file.h>
|
|
#include <linux/stat.h>
|
|
#include <linux/sysctl.h>
|
|
#include <linux/export.h>
|
|
#include <net/ip.h>
|
|
#include <net/arp.h>
|
|
|
|
/*
|
|
* Callsign/UID mapper. This is in kernel space for security on multi-amateur machines.
|
|
*/
|
|
|
|
static HLIST_HEAD(ax25_uid_list);
|
|
static DEFINE_RWLOCK(ax25_uid_lock);
|
|
|
|
int ax25_uid_policy;
|
|
|
|
EXPORT_SYMBOL(ax25_uid_policy);
|
|
|
|
ax25_uid_assoc *ax25_findbyuid(kuid_t uid)
|
|
{
|
|
ax25_uid_assoc *ax25_uid, *res = NULL;
|
|
|
|
read_lock(&ax25_uid_lock);
|
|
ax25_uid_for_each(ax25_uid, &ax25_uid_list) {
|
|
if (uid_eq(ax25_uid->uid, uid)) {
|
|
ax25_uid_hold(ax25_uid);
|
|
res = ax25_uid;
|
|
break;
|
|
}
|
|
}
|
|
read_unlock(&ax25_uid_lock);
|
|
|
|
return res;
|
|
}
|
|
|
|
EXPORT_SYMBOL(ax25_findbyuid);
|
|
|
|
int ax25_uid_ioctl(int cmd, struct sockaddr_ax25 *sax)
|
|
{
|
|
ax25_uid_assoc *ax25_uid;
|
|
ax25_uid_assoc *user;
|
|
unsigned long res;
|
|
|
|
switch (cmd) {
|
|
case SIOCAX25GETUID:
|
|
res = -ENOENT;
|
|
read_lock(&ax25_uid_lock);
|
|
ax25_uid_for_each(ax25_uid, &ax25_uid_list) {
|
|
if (ax25cmp(&sax->sax25_call, &ax25_uid->call) == 0) {
|
|
res = from_kuid_munged(current_user_ns(), ax25_uid->uid);
|
|
break;
|
|
}
|
|
}
|
|
read_unlock(&ax25_uid_lock);
|
|
|
|
return res;
|
|
|
|
case SIOCAX25ADDUID:
|
|
{
|
|
kuid_t sax25_kuid;
|
|
if (!capable(CAP_NET_ADMIN))
|
|
return -EPERM;
|
|
sax25_kuid = make_kuid(current_user_ns(), sax->sax25_uid);
|
|
if (!uid_valid(sax25_kuid))
|
|
return -EINVAL;
|
|
user = ax25_findbyuid(sax25_kuid);
|
|
if (user) {
|
|
ax25_uid_put(user);
|
|
return -EEXIST;
|
|
}
|
|
if (sax->sax25_uid == 0)
|
|
return -EINVAL;
|
|
if ((ax25_uid = kmalloc(sizeof(*ax25_uid), GFP_KERNEL)) == NULL)
|
|
return -ENOMEM;
|
|
|
|
atomic_set(&ax25_uid->refcount, 1);
|
|
ax25_uid->uid = sax25_kuid;
|
|
ax25_uid->call = sax->sax25_call;
|
|
|
|
write_lock(&ax25_uid_lock);
|
|
hlist_add_head(&ax25_uid->uid_node, &ax25_uid_list);
|
|
write_unlock(&ax25_uid_lock);
|
|
|
|
return 0;
|
|
}
|
|
case SIOCAX25DELUID:
|
|
if (!capable(CAP_NET_ADMIN))
|
|
return -EPERM;
|
|
|
|
ax25_uid = NULL;
|
|
write_lock(&ax25_uid_lock);
|
|
ax25_uid_for_each(ax25_uid, &ax25_uid_list) {
|
|
if (ax25cmp(&sax->sax25_call, &ax25_uid->call) == 0)
|
|
break;
|
|
}
|
|
if (ax25_uid == NULL) {
|
|
write_unlock(&ax25_uid_lock);
|
|
return -ENOENT;
|
|
}
|
|
hlist_del_init(&ax25_uid->uid_node);
|
|
ax25_uid_put(ax25_uid);
|
|
write_unlock(&ax25_uid_lock);
|
|
|
|
return 0;
|
|
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return -EINVAL; /*NOTREACHED */
|
|
}
|
|
|
|
#ifdef CONFIG_PROC_FS
|
|
|
|
static void *ax25_uid_seq_start(struct seq_file *seq, loff_t *pos)
|
|
__acquires(ax25_uid_lock)
|
|
{
|
|
read_lock(&ax25_uid_lock);
|
|
return seq_hlist_start_head(&ax25_uid_list, *pos);
|
|
}
|
|
|
|
static void *ax25_uid_seq_next(struct seq_file *seq, void *v, loff_t *pos)
|
|
{
|
|
return seq_hlist_next(v, &ax25_uid_list, pos);
|
|
}
|
|
|
|
static void ax25_uid_seq_stop(struct seq_file *seq, void *v)
|
|
__releases(ax25_uid_lock)
|
|
{
|
|
read_unlock(&ax25_uid_lock);
|
|
}
|
|
|
|
static int ax25_uid_seq_show(struct seq_file *seq, void *v)
|
|
{
|
|
char buf[11];
|
|
|
|
if (v == SEQ_START_TOKEN)
|
|
seq_printf(seq, "Policy: %d\n", ax25_uid_policy);
|
|
else {
|
|
struct ax25_uid_assoc *pt;
|
|
|
|
pt = hlist_entry(v, struct ax25_uid_assoc, uid_node);
|
|
seq_printf(seq, "%6d %s\n",
|
|
from_kuid_munged(seq_user_ns(seq), pt->uid),
|
|
ax2asc(buf, &pt->call));
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static const struct seq_operations ax25_uid_seqops = {
|
|
.start = ax25_uid_seq_start,
|
|
.next = ax25_uid_seq_next,
|
|
.stop = ax25_uid_seq_stop,
|
|
.show = ax25_uid_seq_show,
|
|
};
|
|
|
|
static int ax25_uid_info_open(struct inode *inode, struct file *file)
|
|
{
|
|
return seq_open(file, &ax25_uid_seqops);
|
|
}
|
|
|
|
const struct file_operations ax25_uid_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = ax25_uid_info_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = seq_release,
|
|
};
|
|
|
|
#endif
|
|
|
|
/*
|
|
* Free all memory associated with UID/Callsign structures.
|
|
*/
|
|
void __exit ax25_uid_free(void)
|
|
{
|
|
ax25_uid_assoc *ax25_uid;
|
|
|
|
write_lock(&ax25_uid_lock);
|
|
again:
|
|
ax25_uid_for_each(ax25_uid, &ax25_uid_list) {
|
|
hlist_del_init(&ax25_uid->uid_node);
|
|
ax25_uid_put(ax25_uid);
|
|
goto again;
|
|
}
|
|
write_unlock(&ax25_uid_lock);
|
|
}
|