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/*
* Ioctl handler
* Linux ethernet bridge
*
* Authors:
* Lennert Buytenhek <buytenh@gnu.org>
*
* $Id: br_ioctl.c,v 1.4 2000/11/08 05:16:40 davem Exp $
*
* 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.
*/
#include <linux/kernel.h>
#include <linux/if_bridge.h>
#include <linux/inetdevice.h>
#include <asm/uaccess.h>
#include "br_private.h"
static int br_ioctl_device(struct net_bridge *br,
unsigned int cmd,
unsigned long arg0,
unsigned long arg1,
unsigned long arg2)
{
if (br == NULL)
return -EINVAL;
switch (cmd)
{
case BRCTL_ADD_IF:
case BRCTL_DEL_IF:
{
struct net_device *dev;
int ret;
dev = dev_get_by_index(arg0);
if (dev == NULL)
return -EINVAL;
if (cmd == BRCTL_ADD_IF)
ret = br_add_if(br, dev);
else
ret = br_del_if(br, dev);
dev_put(dev);
return ret;
}
case BRCTL_GET_BRIDGE_INFO:
{
struct __bridge_info b;
memset(&b, 0, sizeof(struct __bridge_info));
memcpy(&b.designated_root, &br->designated_root, 8);
memcpy(&b.bridge_id, &br->bridge_id, 8);
b.root_path_cost = br->root_path_cost;
b.max_age = br->max_age;
b.hello_time = br->hello_time;
b.forward_delay = br->forward_delay;
b.bridge_max_age = br->bridge_max_age;
b.bridge_hello_time = br->bridge_hello_time;
b.bridge_forward_delay = br->bridge_forward_delay;
b.topology_change = br->topology_change;
b.topology_change_detected = br->topology_change_detected;
b.root_port = br->root_port;
b.stp_enabled = br->stp_enabled;
b.ageing_time = br->ageing_time;
b.gc_interval = br->gc_interval;
b.hello_timer_value = br_timer_get_residue(&br->hello_timer);
b.tcn_timer_value = br_timer_get_residue(&br->tcn_timer);
b.topology_change_timer_value = br_timer_get_residue(&br->topology_change_timer);
b.gc_timer_value = br_timer_get_residue(&br->gc_timer);
if (copy_to_user((void *)arg0, &b, sizeof(b)))
return -EFAULT;
return 0;
}
case BRCTL_GET_PORT_LIST:
{
int i;
int indices[256];
for (i=0;i<256;i++)
indices[i] = 0;
br_get_port_ifindices(br, indices);
if (copy_to_user((void *)arg0, indices, 256*sizeof(int)))
return -EFAULT;
return 0;
}
case BRCTL_SET_BRIDGE_FORWARD_DELAY:
br->bridge_forward_delay = arg0;
if (br_is_root_bridge(br))
br->forward_delay = arg0;
return 0;
case BRCTL_SET_BRIDGE_HELLO_TIME:
br->bridge_hello_time = arg0;
if (br_is_root_bridge(br))
br->hello_time = arg0;
return 0;
case BRCTL_SET_BRIDGE_MAX_AGE:
br->bridge_max_age = arg0;
if (br_is_root_bridge(br))
br->max_age = arg0;
return 0;
case BRCTL_SET_AGEING_TIME:
br->ageing_time = arg0;
return 0;
case BRCTL_SET_GC_INTERVAL:
br->gc_interval = arg0;
return 0;
case BRCTL_GET_PORT_INFO:
{
struct __port_info p;
struct net_bridge_port *pt;
if ((pt = br_get_port(br, arg1)) == NULL)
return -EINVAL;
memset(&p, 0, sizeof(struct __port_info));
memcpy(&p.designated_root, &pt->designated_root, 8);
memcpy(&p.designated_bridge, &pt->designated_bridge, 8);
p.port_id = pt->port_id;
p.designated_port = pt->designated_port;
p.path_cost = pt->path_cost;
p.designated_cost = pt->designated_cost;
p.state = pt->state;
p.top_change_ack = pt->topology_change_ack;
p.config_pending = pt->config_pending;
p.message_age_timer_value = br_timer_get_residue(&pt->message_age_timer);
p.forward_delay_timer_value = br_timer_get_residue(&pt->forward_delay_timer);
p.hold_timer_value = br_timer_get_residue(&pt->hold_timer);
if (copy_to_user((void *)arg0, &p, sizeof(p)))
return -EFAULT;
return 0;
}
case BRCTL_SET_BRIDGE_STP_STATE:
br->stp_enabled = arg0?1:0;
return 0;
case BRCTL_SET_BRIDGE_PRIORITY:
br_stp_set_bridge_priority(br, arg0);
return 0;
case BRCTL_SET_PORT_PRIORITY:
{
struct net_bridge_port *p;
if ((p = br_get_port(br, arg0)) == NULL)
return -EINVAL;
br_stp_set_port_priority(p, arg1);
return 0;
}
case BRCTL_SET_PATH_COST:
{
struct net_bridge_port *p;
if ((p = br_get_port(br, arg0)) == NULL)
return -EINVAL;
br_stp_set_path_cost(p, arg1);
return 0;
}
case BRCTL_GET_FDB_ENTRIES:
return br_fdb_get_entries(br, (void *)arg0, arg1, arg2);
}
return -EOPNOTSUPP;
}
static int br_ioctl_deviceless(unsigned int cmd,
unsigned long arg0,
unsigned long arg1)
{
switch (cmd)
{
case BRCTL_GET_VERSION:
return BRCTL_VERSION;
case BRCTL_GET_BRIDGES:
{
int i;
int indices[64];
for (i=0;i<64;i++)
indices[i] = 0;
if (arg1 > 64)
arg1 = 64;
arg1 = br_get_bridge_ifindices(indices, arg1);
if (copy_to_user((void *)arg0, indices, arg1*sizeof(int)))
return -EFAULT;
return arg1;
}
case BRCTL_ADD_BRIDGE:
case BRCTL_DEL_BRIDGE:
{
char buf[IFNAMSIZ];
if (copy_from_user(buf, (void *)arg0, IFNAMSIZ))
return -EFAULT;
buf[IFNAMSIZ-1] = 0;
if (cmd == BRCTL_ADD_BRIDGE)
return br_add_bridge(buf);
return br_del_bridge(buf);
}
}
return -EOPNOTSUPP;
}
DECLARE_MUTEX(ioctl_mutex);
int br_ioctl_deviceless_stub(unsigned long arg)
{
int err;
unsigned long i[3];
if (!capable(CAP_NET_ADMIN))
return -EPERM;
if (copy_from_user(i, (void *)arg, 3*sizeof(unsigned long)))
return -EFAULT;
down(&ioctl_mutex);
err = br_ioctl_deviceless(i[0], i[1], i[2]);
up(&ioctl_mutex);
return err;
}
int br_ioctl(struct net_bridge *br, unsigned int cmd, unsigned long arg0, unsigned long arg1, unsigned long arg2)
{
int err;
if (!capable(CAP_NET_ADMIN))
return -EPERM;
down(&ioctl_mutex);
err = br_ioctl_deviceless(cmd, arg0, arg1);
if (err == -EOPNOTSUPP)
err = br_ioctl_device(br, cmd, arg0, arg1, arg2);
up(&ioctl_mutex);
return err;
}
void br_call_ioctl_atomic(void (*fn)(void))
{
down(&ioctl_mutex);
fn();
up(&ioctl_mutex);
}
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