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Commit e07d4ca8 authored by David S. Miller's avatar David S. Miller
Browse files

Merge branch 'vxlan_lower_dev_unregister' 



Daniel Borkmann says:

====================
vxlan updates

Did the split into two patches upon request from Cong Wang.

Changelog:

 v1->v2:
  - Removed BUG_ON as it's not needed.
 v2->v3:
  - Removed dev->reg_state check for netns.
 v3->v4:
  - Removed list_del(), we seem to do it in some places and
    in some others not; we agreed it's not really necessary.
  - Split patch into 2 patches, notifier part and module
    unload cleanup part.
====================

Reviewed-by: default avatarCong Wang <cwang@twopensource.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parents fb52cab5 8425783c

drivers/net/vxlan.c

+51 −7
Original line number Diff line number Diff line
@@ -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);
@@ -2672,13 +2710,13 @@ static __net_init int vxlan_init_net(struct net *net) 
static __net_exit void vxlan_exit_net(struct net *net)

{

	struct vxlan_net *vn = net_generic(net, vxlan_net_id);

	struct vxlan_dev *vxlan;

	LIST_HEAD(list);

	struct vxlan_dev *vxlan, *next;

	LIST_HEAD(list_kill);



	rtnl_lock();

	list_for_each_entry(vxlan, &vn->vxlan_list, next)

		unregister_netdevice_queue(vxlan->dev, &list);

	unregister_netdevice_many(&list);

	list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next)

		vxlan_dellink(vxlan->dev, &list_kill);

	unregister_netdevice_many(&list_kill);

	rtnl_unlock();

}
@@ -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();