365 строки
10 KiB
C
365 строки
10 KiB
C
/*
|
|
* Sysfs attributes of bridge ports
|
|
* Linux ethernet bridge
|
|
*
|
|
* Authors:
|
|
* Stephen Hemminger <shemminger@osdl.org>
|
|
*
|
|
* 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/netdevice.h>
|
|
#include <linux/if_bridge.h>
|
|
#include <linux/rtnetlink.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/times.h>
|
|
|
|
#include "br_private.h"
|
|
|
|
#define to_class_dev(obj) container_of(obj,struct class_device,kobj)
|
|
#define to_net_dev(class) container_of(class, struct net_device, class_dev)
|
|
#define to_bridge(cd) ((struct net_bridge *)(to_net_dev(cd)->priv))
|
|
|
|
/*
|
|
* Common code for storing bridge parameters.
|
|
*/
|
|
static ssize_t store_bridge_parm(struct class_device *cd,
|
|
const char *buf, size_t len,
|
|
void (*set)(struct net_bridge *, unsigned long))
|
|
{
|
|
struct net_bridge *br = to_bridge(cd);
|
|
char *endp;
|
|
unsigned long val;
|
|
|
|
if (!capable(CAP_NET_ADMIN))
|
|
return -EPERM;
|
|
|
|
val = simple_strtoul(buf, &endp, 0);
|
|
if (endp == buf)
|
|
return -EINVAL;
|
|
|
|
spin_lock_bh(&br->lock);
|
|
(*set)(br, val);
|
|
spin_unlock_bh(&br->lock);
|
|
return len;
|
|
}
|
|
|
|
|
|
static ssize_t show_forward_delay(struct class_device *cd, char *buf)
|
|
{
|
|
struct net_bridge *br = to_bridge(cd);
|
|
return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->forward_delay));
|
|
}
|
|
|
|
static void set_forward_delay(struct net_bridge *br, unsigned long val)
|
|
{
|
|
unsigned long delay = clock_t_to_jiffies(val);
|
|
br->forward_delay = delay;
|
|
if (br_is_root_bridge(br))
|
|
br->bridge_forward_delay = delay;
|
|
}
|
|
|
|
static ssize_t store_forward_delay(struct class_device *cd, const char *buf,
|
|
size_t len)
|
|
{
|
|
return store_bridge_parm(cd, buf, len, set_forward_delay);
|
|
}
|
|
static CLASS_DEVICE_ATTR(forward_delay, S_IRUGO | S_IWUSR,
|
|
show_forward_delay, store_forward_delay);
|
|
|
|
static ssize_t show_hello_time(struct class_device *cd, char *buf)
|
|
{
|
|
return sprintf(buf, "%lu\n",
|
|
jiffies_to_clock_t(to_bridge(cd)->hello_time));
|
|
}
|
|
|
|
static void set_hello_time(struct net_bridge *br, unsigned long val)
|
|
{
|
|
unsigned long t = clock_t_to_jiffies(val);
|
|
br->hello_time = t;
|
|
if (br_is_root_bridge(br))
|
|
br->bridge_hello_time = t;
|
|
}
|
|
|
|
static ssize_t store_hello_time(struct class_device *cd, const char *buf,
|
|
size_t len)
|
|
{
|
|
return store_bridge_parm(cd, buf, len, set_hello_time);
|
|
}
|
|
|
|
static CLASS_DEVICE_ATTR(hello_time, S_IRUGO | S_IWUSR, show_hello_time,
|
|
store_hello_time);
|
|
|
|
static ssize_t show_max_age(struct class_device *cd, char *buf)
|
|
{
|
|
return sprintf(buf, "%lu\n",
|
|
jiffies_to_clock_t(to_bridge(cd)->max_age));
|
|
}
|
|
|
|
static void set_max_age(struct net_bridge *br, unsigned long val)
|
|
{
|
|
unsigned long t = clock_t_to_jiffies(val);
|
|
br->max_age = t;
|
|
if (br_is_root_bridge(br))
|
|
br->bridge_max_age = t;
|
|
}
|
|
|
|
static ssize_t store_max_age(struct class_device *cd, const char *buf,
|
|
size_t len)
|
|
{
|
|
return store_bridge_parm(cd, buf, len, set_max_age);
|
|
}
|
|
|
|
static CLASS_DEVICE_ATTR(max_age, S_IRUGO | S_IWUSR, show_max_age,
|
|
store_max_age);
|
|
|
|
static ssize_t show_ageing_time(struct class_device *cd, char *buf)
|
|
{
|
|
struct net_bridge *br = to_bridge(cd);
|
|
return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->ageing_time));
|
|
}
|
|
|
|
static void set_ageing_time(struct net_bridge *br, unsigned long val)
|
|
{
|
|
br->ageing_time = clock_t_to_jiffies(val);
|
|
}
|
|
|
|
static ssize_t store_ageing_time(struct class_device *cd, const char *buf,
|
|
size_t len)
|
|
{
|
|
return store_bridge_parm(cd, buf, len, set_ageing_time);
|
|
}
|
|
|
|
static CLASS_DEVICE_ATTR(ageing_time, S_IRUGO | S_IWUSR, show_ageing_time,
|
|
store_ageing_time);
|
|
static ssize_t show_stp_state(struct class_device *cd, char *buf)
|
|
{
|
|
struct net_bridge *br = to_bridge(cd);
|
|
return sprintf(buf, "%d\n", br->stp_enabled);
|
|
}
|
|
|
|
static void set_stp_state(struct net_bridge *br, unsigned long val)
|
|
{
|
|
br->stp_enabled = val;
|
|
}
|
|
|
|
static ssize_t store_stp_state(struct class_device *cd,
|
|
const char *buf, size_t len)
|
|
{
|
|
return store_bridge_parm(cd, buf, len, set_stp_state);
|
|
}
|
|
|
|
static CLASS_DEVICE_ATTR(stp_state, S_IRUGO | S_IWUSR, show_stp_state,
|
|
store_stp_state);
|
|
|
|
static ssize_t show_priority(struct class_device *cd, char *buf)
|
|
{
|
|
struct net_bridge *br = to_bridge(cd);
|
|
return sprintf(buf, "%d\n",
|
|
(br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1]);
|
|
}
|
|
|
|
static void set_priority(struct net_bridge *br, unsigned long val)
|
|
{
|
|
br_stp_set_bridge_priority(br, (u16) val);
|
|
}
|
|
|
|
static ssize_t store_priority(struct class_device *cd,
|
|
const char *buf, size_t len)
|
|
{
|
|
return store_bridge_parm(cd, buf, len, set_priority);
|
|
}
|
|
static CLASS_DEVICE_ATTR(priority, S_IRUGO | S_IWUSR, show_priority,
|
|
store_priority);
|
|
|
|
static ssize_t show_root_id(struct class_device *cd, char *buf)
|
|
{
|
|
return br_show_bridge_id(buf, &to_bridge(cd)->designated_root);
|
|
}
|
|
static CLASS_DEVICE_ATTR(root_id, S_IRUGO, show_root_id, NULL);
|
|
|
|
static ssize_t show_bridge_id(struct class_device *cd, char *buf)
|
|
{
|
|
return br_show_bridge_id(buf, &to_bridge(cd)->bridge_id);
|
|
}
|
|
static CLASS_DEVICE_ATTR(bridge_id, S_IRUGO, show_bridge_id, NULL);
|
|
|
|
static ssize_t show_root_port(struct class_device *cd, char *buf)
|
|
{
|
|
return sprintf(buf, "%d\n", to_bridge(cd)->root_port);
|
|
}
|
|
static CLASS_DEVICE_ATTR(root_port, S_IRUGO, show_root_port, NULL);
|
|
|
|
static ssize_t show_root_path_cost(struct class_device *cd, char *buf)
|
|
{
|
|
return sprintf(buf, "%d\n", to_bridge(cd)->root_path_cost);
|
|
}
|
|
static CLASS_DEVICE_ATTR(root_path_cost, S_IRUGO, show_root_path_cost, NULL);
|
|
|
|
static ssize_t show_topology_change(struct class_device *cd, char *buf)
|
|
{
|
|
return sprintf(buf, "%d\n", to_bridge(cd)->topology_change);
|
|
}
|
|
static CLASS_DEVICE_ATTR(topology_change, S_IRUGO, show_topology_change, NULL);
|
|
|
|
static ssize_t show_topology_change_detected(struct class_device *cd, char *buf)
|
|
{
|
|
struct net_bridge *br = to_bridge(cd);
|
|
return sprintf(buf, "%d\n", br->topology_change_detected);
|
|
}
|
|
static CLASS_DEVICE_ATTR(topology_change_detected, S_IRUGO, show_topology_change_detected, NULL);
|
|
|
|
static ssize_t show_hello_timer(struct class_device *cd, char *buf)
|
|
{
|
|
struct net_bridge *br = to_bridge(cd);
|
|
return sprintf(buf, "%ld\n", br_timer_value(&br->hello_timer));
|
|
}
|
|
static CLASS_DEVICE_ATTR(hello_timer, S_IRUGO, show_hello_timer, NULL);
|
|
|
|
static ssize_t show_tcn_timer(struct class_device *cd, char *buf)
|
|
{
|
|
struct net_bridge *br = to_bridge(cd);
|
|
return sprintf(buf, "%ld\n", br_timer_value(&br->tcn_timer));
|
|
}
|
|
static CLASS_DEVICE_ATTR(tcn_timer, S_IRUGO, show_tcn_timer, NULL);
|
|
|
|
static ssize_t show_topology_change_timer(struct class_device *cd, char *buf)
|
|
{
|
|
struct net_bridge *br = to_bridge(cd);
|
|
return sprintf(buf, "%ld\n", br_timer_value(&br->topology_change_timer));
|
|
}
|
|
static CLASS_DEVICE_ATTR(topology_change_timer, S_IRUGO, show_topology_change_timer, NULL);
|
|
|
|
static ssize_t show_gc_timer(struct class_device *cd, char *buf)
|
|
{
|
|
struct net_bridge *br = to_bridge(cd);
|
|
return sprintf(buf, "%ld\n", br_timer_value(&br->gc_timer));
|
|
}
|
|
static CLASS_DEVICE_ATTR(gc_timer, S_IRUGO, show_gc_timer, NULL);
|
|
|
|
static struct attribute *bridge_attrs[] = {
|
|
&class_device_attr_forward_delay.attr,
|
|
&class_device_attr_hello_time.attr,
|
|
&class_device_attr_max_age.attr,
|
|
&class_device_attr_ageing_time.attr,
|
|
&class_device_attr_stp_state.attr,
|
|
&class_device_attr_priority.attr,
|
|
&class_device_attr_bridge_id.attr,
|
|
&class_device_attr_root_id.attr,
|
|
&class_device_attr_root_path_cost.attr,
|
|
&class_device_attr_root_port.attr,
|
|
&class_device_attr_topology_change.attr,
|
|
&class_device_attr_topology_change_detected.attr,
|
|
&class_device_attr_hello_timer.attr,
|
|
&class_device_attr_tcn_timer.attr,
|
|
&class_device_attr_topology_change_timer.attr,
|
|
&class_device_attr_gc_timer.attr,
|
|
NULL
|
|
};
|
|
|
|
static struct attribute_group bridge_group = {
|
|
.name = SYSFS_BRIDGE_ATTR,
|
|
.attrs = bridge_attrs,
|
|
};
|
|
|
|
/*
|
|
* Export the forwarding information table as a binary file
|
|
* The records are struct __fdb_entry.
|
|
*
|
|
* Returns the number of bytes read.
|
|
*/
|
|
static ssize_t brforward_read(struct kobject *kobj, char *buf,
|
|
loff_t off, size_t count)
|
|
{
|
|
struct class_device *cdev = to_class_dev(kobj);
|
|
struct net_bridge *br = to_bridge(cdev);
|
|
int n;
|
|
|
|
/* must read whole records */
|
|
if (off % sizeof(struct __fdb_entry) != 0)
|
|
return -EINVAL;
|
|
|
|
n = br_fdb_fillbuf(br, buf,
|
|
count / sizeof(struct __fdb_entry),
|
|
off / sizeof(struct __fdb_entry));
|
|
|
|
if (n > 0)
|
|
n *= sizeof(struct __fdb_entry);
|
|
|
|
return n;
|
|
}
|
|
|
|
static struct bin_attribute bridge_forward = {
|
|
.attr = { .name = SYSFS_BRIDGE_FDB,
|
|
.mode = S_IRUGO,
|
|
.owner = THIS_MODULE, },
|
|
.read = brforward_read,
|
|
};
|
|
|
|
/*
|
|
* Add entries in sysfs onto the existing network class device
|
|
* for the bridge.
|
|
* Adds a attribute group "bridge" containing tuning parameters.
|
|
* Binary attribute containing the forward table
|
|
* Sub directory to hold links to interfaces.
|
|
*
|
|
* Note: the ifobj exists only to be a subdirectory
|
|
* to hold links. The ifobj exists in same data structure
|
|
* as it's parent the bridge so reference counting works.
|
|
*/
|
|
int br_sysfs_addbr(struct net_device *dev)
|
|
{
|
|
struct kobject *brobj = &dev->class_dev.kobj;
|
|
struct net_bridge *br = netdev_priv(dev);
|
|
int err;
|
|
|
|
err = sysfs_create_group(brobj, &bridge_group);
|
|
if (err) {
|
|
pr_info("%s: can't create group %s/%s\n",
|
|
__FUNCTION__, dev->name, bridge_group.name);
|
|
goto out1;
|
|
}
|
|
|
|
err = sysfs_create_bin_file(brobj, &bridge_forward);
|
|
if (err) {
|
|
pr_info("%s: can't create attribue file %s/%s\n",
|
|
__FUNCTION__, dev->name, bridge_forward.attr.name);
|
|
goto out2;
|
|
}
|
|
|
|
|
|
kobject_set_name(&br->ifobj, SYSFS_BRIDGE_PORT_SUBDIR);
|
|
br->ifobj.ktype = NULL;
|
|
br->ifobj.kset = NULL;
|
|
br->ifobj.parent = brobj;
|
|
|
|
err = kobject_register(&br->ifobj);
|
|
if (err) {
|
|
pr_info("%s: can't add kobject (directory) %s/%s\n",
|
|
__FUNCTION__, dev->name, br->ifobj.name);
|
|
goto out3;
|
|
}
|
|
return 0;
|
|
out3:
|
|
sysfs_remove_bin_file(&dev->class_dev.kobj, &bridge_forward);
|
|
out2:
|
|
sysfs_remove_group(&dev->class_dev.kobj, &bridge_group);
|
|
out1:
|
|
return err;
|
|
|
|
}
|
|
|
|
void br_sysfs_delbr(struct net_device *dev)
|
|
{
|
|
struct kobject *kobj = &dev->class_dev.kobj;
|
|
struct net_bridge *br = netdev_priv(dev);
|
|
|
|
kobject_unregister(&br->ifobj);
|
|
sysfs_remove_bin_file(kobj, &bridge_forward);
|
|
sysfs_remove_group(kobj, &bridge_group);
|
|
}
|