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bridge: notify applications if address of bridge device changes

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The mac address of the bridge device may be changed when a new interface
is added to the bridge. If this happens, then the bridge needs to call
the network notifiers to tickle any other systems that care. Since bridge
can be a module, this also means exporting the notifier function.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
stephen hemminger
2011-03-24 13:24:01 +00:00
committed by David S. Miller
parent 8628bd8af7
commit edf947f100
4 changed files with 13 additions and 5 deletions
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6
net/bridge/br_if.c
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@@ -389,6 +389,7 @@ int br_add_if(struct net_bridge *br, struct net_device *dev)
{
struct net_bridge_port *p;
int err = 0;
bool changed_addr;
/* Don't allow bridging non-ethernet like devices */
if ((dev->flags & IFF_LOOPBACK) ||
@@ -446,7 +447,7 @@ int br_add_if(struct net_bridge *br, struct net_device *dev)
list_add_rcu(&p->list, &br->port_list);
spin_lock_bh(&br->lock);
br_stp_recalculate_bridge_id(br);
changed_addr = br_stp_recalculate_bridge_id(br);
br_features_recompute(br);
if ((dev->flags & IFF_UP) && netif_carrier_ok(dev) &&
@@ -456,6 +457,9 @@ int br_add_if(struct net_bridge *br, struct net_device *dev)
br_ifinfo_notify(RTM_NEWLINK, p);
if (changed_addr)
call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
dev_set_mtu(br->dev, br_min_mtu(br));
kobject_uevent(&p->kobj, KOBJ_ADD);