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Commit 57b61127 authored by Haishuang Yan's avatar Haishuang Yan Committed by David S. Miller
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vxlan: speedup vxlan tunnels dismantle



Since we now hold RTNL lock in vxlan_exit_net, it's better to batch them
to speedup vxlan tunnels dismantle.

Signed-off-by: default avatarHaishuang Yan <yanhaishuang@cmss.chinamobile.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 41b0cd36
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+17 −9
Original line number Diff line number Diff line
@@ -3692,18 +3692,16 @@ static __net_init int vxlan_init_net(struct net *net)
	return 0;
}

static void __net_exit vxlan_exit_net(struct net *net)
static void vxlan_destroy_tunnels(struct net *net, struct list_head *head)
{
	struct vxlan_net *vn = net_generic(net, vxlan_net_id);
	struct vxlan_dev *vxlan, *next;
	struct net_device *dev, *aux;
	unsigned int h;
	LIST_HEAD(list);

	rtnl_lock();
	for_each_netdev_safe(net, dev, aux)
		if (dev->rtnl_link_ops == &vxlan_link_ops)
			unregister_netdevice_queue(dev, &list);
			unregister_netdevice_queue(dev, head);

	list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) {
		/* If vxlan->dev is in the same netns, it has already been added
@@ -3711,20 +3709,30 @@ static void __net_exit vxlan_exit_net(struct net *net)
		 */
		if (!net_eq(dev_net(vxlan->dev), net)) {
			gro_cells_destroy(&vxlan->gro_cells);
			unregister_netdevice_queue(vxlan->dev, &list);
			unregister_netdevice_queue(vxlan->dev, head);
		}
	}

	unregister_netdevice_many(&list);
	rtnl_unlock();

	for (h = 0; h < PORT_HASH_SIZE; ++h)
		WARN_ON_ONCE(!hlist_empty(&vn->sock_list[h]));
}

static void __net_exit vxlan_exit_batch_net(struct list_head *net_list)
{
	struct net *net;
	LIST_HEAD(list);

	rtnl_lock();
	list_for_each_entry(net, net_list, exit_list)
		vxlan_destroy_tunnels(net, &list);

	unregister_netdevice_many(&list);
	rtnl_unlock();
}

static struct pernet_operations vxlan_net_ops = {
	.init = vxlan_init_net,
	.exit = vxlan_exit_net,
	.exit_batch = vxlan_exit_batch_net,
	.id   = &vxlan_net_id,
	.size = sizeof(struct vxlan_net),
};