bridge: allow creating bridge devices with netlink
Add netlink device ops to allow creating bridge device via netlink.
This works in a manner similar to vlan, macvlan and bonding.
Example:
# ip link add link dev br0 type bridge
# ip link del dev br0
The change required rearranging initializtion code to deal with
being called by create link. Most of the initialization happens
in br_dev_setup, but allocation of stats is done in ndo_init callback
to deal with allocation failure. Sysfs setup has to wait until
after the network device kobject is registered.
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/bridge/br_device.c b/net/bridge/br_device.c
index 21e5901..45cfd54 100644
--- a/net/bridge/br_device.c
+++ b/net/bridge/br_device.c
@@ -74,6 +74,17 @@
return NETDEV_TX_OK;
}
+static int br_dev_init(struct net_device *dev)
+{
+ struct net_bridge *br = netdev_priv(dev);
+
+ br->stats = alloc_percpu(struct br_cpu_netstats);
+ if (!br->stats)
+ return -ENOMEM;
+
+ return 0;
+}
+
static int br_dev_open(struct net_device *dev)
{
struct net_bridge *br = netdev_priv(dev);
@@ -334,6 +345,7 @@
static const struct net_device_ops br_netdev_ops = {
.ndo_open = br_dev_open,
.ndo_stop = br_dev_stop,
+ .ndo_init = br_dev_init,
.ndo_start_xmit = br_dev_xmit,
.ndo_get_stats64 = br_get_stats64,
.ndo_set_mac_address = br_set_mac_address,
@@ -357,18 +369,47 @@
free_netdev(dev);
}
+static struct device_type br_type = {
+ .name = "bridge",
+};
+
void br_dev_setup(struct net_device *dev)
{
+ struct net_bridge *br = netdev_priv(dev);
+
random_ether_addr(dev->dev_addr);
ether_setup(dev);
dev->netdev_ops = &br_netdev_ops;
dev->destructor = br_dev_free;
SET_ETHTOOL_OPS(dev, &br_ethtool_ops);
+ SET_NETDEV_DEVTYPE(dev, &br_type);
dev->tx_queue_len = 0;
dev->priv_flags = IFF_EBRIDGE;
dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_HIGHDMA |
NETIF_F_GSO_MASK | NETIF_F_NO_CSUM | NETIF_F_LLTX |
NETIF_F_NETNS_LOCAL | NETIF_F_GSO | NETIF_F_HW_VLAN_TX;
+
+ br->dev = dev;
+ spin_lock_init(&br->lock);
+ INIT_LIST_HEAD(&br->port_list);
+ spin_lock_init(&br->hash_lock);
+
+ br->bridge_id.prio[0] = 0x80;
+ br->bridge_id.prio[1] = 0x00;
+
+ memcpy(br->group_addr, br_group_address, ETH_ALEN);
+
+ br->feature_mask = dev->features;
+ br->stp_enabled = BR_NO_STP;
+ br->designated_root = br->bridge_id;
+ br->bridge_max_age = br->max_age = 20 * HZ;
+ br->bridge_hello_time = br->hello_time = 2 * HZ;
+ br->bridge_forward_delay = br->forward_delay = 15 * HZ;
+ br->ageing_time = 300 * HZ;
+
+ br_netfilter_rtable_init(br);
+ br_stp_timer_init(br);
+ br_multicast_init(br);
}