To use this file:
echo "+<device name>" > /sys/class/net/<name>/bridge/interfaces
to add a new physical interface to bridge device <name>, and:
echo "-<device name>" > interfaces
to remove a device. Reading the file lists the current phyiscal interfaces for
that bridge.
Signed-off-by: Bill Nottingham <[EMAIL PROTECTED]>
---
net/bridge/br_sysfs_br.c | 65 ++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 65 insertions(+), 0 deletions(-)
diff --git a/net/bridge/br_sysfs_br.c b/net/bridge/br_sysfs_br.c
index a5d5fef..2dae8f3 100644
--- a/net/bridge/br_sysfs_br.c
+++ b/net/bridge/br_sysfs_br.c
@@ -405,6 +405,70 @@ static ssize_t store_flush(struct device *d,
}
static DEVICE_ATTR(flush, S_IWUSR, NULL, store_flush);
+static ssize_t show_interfaces(struct device *d,
+ struct device_attribute *attr, char *buf)
+{
+ struct net_bridge *br = to_bridge(d);
+ struct net_bridge_port *p;
+ int res = 0;
+
+ list_for_each_entry(p, &br->port_list, list) {
+ if (res > (PAGE_SIZE - IFNAMSIZ)) {
+ if ((PAGE_SIZE - res) > 10)
+ res = PAGE_SIZE - 10;
+ res += sprintf(buf + res, "++more++ ");
+ break;
+ }
+ res += sprintf(buf + res, "%s ", p->dev->name);
+ }
+ if (res)
+ buf[res-1] = '\n';
+ return res;
+}
+
+static ssize_t store_interfaces(struct device *d,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ char command[IFNAMSIZ + 1] = { 0, };
+ char *ifname;
+ struct net_bridge *br = to_bridge(d);
+ struct net_device *dev;
+ int ret = 0;
+
+ sscanf(buf, "%16s", command); /* IFNAMSIZ */
+ ifname = command + 1;
+ if ((strlen(command) <= 1) || !dev_valid_name(ifname))
+ goto err_no_cmd;
+ if (command[0] == '+') {
+ rtnl_lock();
+ dev = __dev_get_by_name(&init_net, ifname);
+ if (dev == NULL)
+ ret = -ENXIO;
+ else
+ ret = br_add_if(br, dev);
+ rtnl_unlock();
+ goto out;
+ }
+ if (command[0] == '-') {
+ rtnl_lock();
+ dev = __dev_get_by_name(&init_net, ifname);
+ if (dev == NULL)
+ ret = -ENXIO;
+ else
+ ret = br_del_if(br, dev);
+ rtnl_unlock();
+ goto out;
+ }
+err_no_cmd:
+ printk(KERN_ERR "bridge: no command found in interfaces file for bridge
%s. Use +ifname or -ifname.\n", br->dev->name);
+ ret = -EPERM;
+out:
+ return ret ? ret: len;
+}
+
+static DEVICE_ATTR(interfaces, S_IRUGO | S_IWUSR, show_interfaces,
store_interfaces);
+
static struct attribute *bridge_attrs[] = {
&dev_attr_forward_delay.attr,
&dev_attr_hello_time.attr,
@@ -424,6 +488,7 @@ static struct attribute *bridge_attrs[] = {
&dev_attr_gc_timer.attr,
&dev_attr_group_addr.attr,
&dev_attr_flush.attr,
+ &dev_attr_interfaces.attr,
NULL
};
--
1.5.5.1
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