diff options
| -rw-r--r-- | drivers/net/vxlan.c | 48 |
1 files changed, 46 insertions, 2 deletions
diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c index 8c40802e7dd9..d35d52f03185 100644 --- a/drivers/net/vxlan.c +++ b/drivers/net/vxlan.c @@ -2655,6 +2655,44 @@ static struct rtnl_link_ops vxlan_link_ops __read_mostly = { .fill_info = vxlan_fill_info, }; +static void vxlan_handle_lowerdev_unregister(struct vxlan_net *vn, + struct net_device *dev) +{ + struct vxlan_dev *vxlan, *next; + LIST_HEAD(list_kill); + + list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) { + struct vxlan_rdst *dst = &vxlan->default_dst; + + /* In case we created vxlan device with carrier + * and we loose the carrier due to module unload + * we also need to remove vxlan device. In other + * cases, it's not necessary and remote_ifindex + * is 0 here, so no matches. + */ + if (dst->remote_ifindex == dev->ifindex) + vxlan_dellink(vxlan->dev, &list_kill); + } + + unregister_netdevice_many(&list_kill); +} + +static int vxlan_lowerdev_event(struct notifier_block *unused, + unsigned long event, void *ptr) +{ + struct net_device *dev = netdev_notifier_info_to_dev(ptr); + struct vxlan_net *vn = net_generic(dev_net(dev), vxlan_net_id); + + if (event == NETDEV_UNREGISTER) + vxlan_handle_lowerdev_unregister(vn, dev); + + return NOTIFY_DONE; +} + +static struct notifier_block vxlan_notifier_block __read_mostly = { + .notifier_call = vxlan_lowerdev_event, +}; + static __net_init int vxlan_init_net(struct net *net) { struct vxlan_net *vn = net_generic(net, vxlan_net_id); @@ -2703,12 +2741,17 @@ static int __init vxlan_init_module(void) if (rc) goto out1; - rc = rtnl_link_register(&vxlan_link_ops); + rc = register_netdevice_notifier(&vxlan_notifier_block); if (rc) goto out2; - return 0; + rc = rtnl_link_register(&vxlan_link_ops); + if (rc) + goto out3; + return 0; +out3: + unregister_netdevice_notifier(&vxlan_notifier_block); out2: unregister_pernet_device(&vxlan_net_ops); out1: @@ -2720,6 +2763,7 @@ late_initcall(vxlan_init_module); static void __exit vxlan_cleanup_module(void) { rtnl_link_unregister(&vxlan_link_ops); + unregister_netdevice_notifier(&vxlan_notifier_block); destroy_workqueue(vxlan_wq); unregister_pernet_device(&vxlan_net_ops); rcu_barrier(); |