macvlan: Support bonding events

Bonding and team drivers generate specific events during failover
that trigger switch updates.  When a macvlan device is configured
on top of bonding, we want switches to learn about the macvlan
devices as well.   This patch adds a handler to macvlan driver to
propagate these events to all macvlan devices.  We let the generic
inetdev event handler do the work.

This allows macvlan to operated correctly over active-backup
mode bond.

Signed-off-by: Vlad Yasevich <vyasevic@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c
index eee9106..453d55a 100644 (file)
--- a/drivers/net/macvlan.c
+++ b/drivers/net/macvlan.c
@@ -1209,6 +1209,13 @@ static int macvlan_device_event(struct notifier_block *unused,
        case NETDEV_PRE_TYPE_CHANGE:
                /* Forbid underlaying device to change its type. */
                return NOTIFY_BAD;
+
+       case NETDEV_NOTIFY_PEERS:
+       case NETDEV_BONDING_FAILOVER:
+       case NETDEV_RESEND_IGMP:
+               /* Propagate to all vlans */
+               list_for_each_entry(vlan, &port->vlans, list)
+                       call_netdevice_notifiers(event, vlan->dev);
        }
        return NOTIFY_DONE;
 }