mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-27 06:34:11 +08:00
31fdc5553b
Signed-off-by: Rémi Denis-Courmont <remi@remlab.net> Cc: Sakari Ailus <sakari.ailus@nokia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
111 lines
2.7 KiB
C
111 lines
2.7 KiB
C
/*
|
|
* File: sysctl.c
|
|
*
|
|
* Phonet /proc/sys/net/phonet interface implementation
|
|
*
|
|
* Copyright (C) 2008 Nokia Corporation.
|
|
*
|
|
* Author: Rémi Denis-Courmont
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* version 2 as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
|
|
* 02110-1301 USA
|
|
*/
|
|
|
|
#include <linux/seqlock.h>
|
|
#include <linux/sysctl.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/init.h>
|
|
|
|
#include <net/sock.h>
|
|
#include <linux/phonet.h>
|
|
#include <net/phonet/phonet.h>
|
|
|
|
#define DYNAMIC_PORT_MIN 0x40
|
|
#define DYNAMIC_PORT_MAX 0x7f
|
|
|
|
static DEFINE_SEQLOCK(local_port_range_lock);
|
|
static int local_port_range_min[2] = {0, 0};
|
|
static int local_port_range_max[2] = {1023, 1023};
|
|
static int local_port_range[2] = {DYNAMIC_PORT_MIN, DYNAMIC_PORT_MAX};
|
|
static struct ctl_table_header *phonet_table_hrd;
|
|
|
|
static void set_local_port_range(int range[2])
|
|
{
|
|
write_seqlock(&local_port_range_lock);
|
|
local_port_range[0] = range[0];
|
|
local_port_range[1] = range[1];
|
|
write_sequnlock(&local_port_range_lock);
|
|
}
|
|
|
|
void phonet_get_local_port_range(int *min, int *max)
|
|
{
|
|
unsigned int seq;
|
|
|
|
do {
|
|
seq = read_seqbegin(&local_port_range_lock);
|
|
if (min)
|
|
*min = local_port_range[0];
|
|
if (max)
|
|
*max = local_port_range[1];
|
|
} while (read_seqretry(&local_port_range_lock, seq));
|
|
}
|
|
|
|
static int proc_local_port_range(ctl_table *table, int write,
|
|
void __user *buffer,
|
|
size_t *lenp, loff_t *ppos)
|
|
{
|
|
int ret;
|
|
int range[2] = {local_port_range[0], local_port_range[1]};
|
|
ctl_table tmp = {
|
|
.data = &range,
|
|
.maxlen = sizeof(range),
|
|
.mode = table->mode,
|
|
.extra1 = &local_port_range_min,
|
|
.extra2 = &local_port_range_max,
|
|
};
|
|
|
|
ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos);
|
|
|
|
if (write && ret == 0) {
|
|
if (range[1] < range[0])
|
|
ret = -EINVAL;
|
|
else
|
|
set_local_port_range(range);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static struct ctl_table phonet_table[] = {
|
|
{
|
|
.procname = "local_port_range",
|
|
.data = &local_port_range,
|
|
.maxlen = sizeof(local_port_range),
|
|
.mode = 0644,
|
|
.proc_handler = proc_local_port_range,
|
|
},
|
|
{ }
|
|
};
|
|
|
|
int __init phonet_sysctl_init(void)
|
|
{
|
|
phonet_table_hrd = register_net_sysctl(&init_net, "net/phonet", phonet_table);
|
|
return phonet_table_hrd == NULL ? -ENOMEM : 0;
|
|
}
|
|
|
|
void phonet_sysctl_exit(void)
|
|
{
|
|
unregister_net_sysctl_table(phonet_table_hrd);
|
|
}
|