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Commit b3a27b51 authored by Tom Herbert's avatar Tom Herbert Committed by David S. Miller
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ip6_tunnel: Add support for fou/gue encapsulation 



Add netlink and setup for encapsulation

Signed-off-by: default avatarTom Herbert <tom@herbertland.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 1faf3d9f

net/ipv6/ip6_tunnel.c

+72 −0
Original line number Diff line number Diff line
@@ -1797,13 +1797,55 @@ static void ip6_tnl_netlink_parms(struct nlattr *data[], 
		parms->proto = nla_get_u8(data[IFLA_IPTUN_PROTO]);

}



static bool ip6_tnl_netlink_encap_parms(struct nlattr *data[],

					struct ip_tunnel_encap *ipencap)

{

	bool ret = false;



	memset(ipencap, 0, sizeof(*ipencap));



	if (!data)

		return ret;



	if (data[IFLA_IPTUN_ENCAP_TYPE]) {

		ret = true;

		ipencap->type = nla_get_u16(data[IFLA_IPTUN_ENCAP_TYPE]);

	}



	if (data[IFLA_IPTUN_ENCAP_FLAGS]) {

		ret = true;

		ipencap->flags = nla_get_u16(data[IFLA_IPTUN_ENCAP_FLAGS]);

	}



	if (data[IFLA_IPTUN_ENCAP_SPORT]) {

		ret = true;

		ipencap->sport = nla_get_be16(data[IFLA_IPTUN_ENCAP_SPORT]);

	}



	if (data[IFLA_IPTUN_ENCAP_DPORT]) {

		ret = true;

		ipencap->dport = nla_get_be16(data[IFLA_IPTUN_ENCAP_DPORT]);

	}



	return ret;

}



static int ip6_tnl_newlink(struct net *src_net, struct net_device *dev,

			   struct nlattr *tb[], struct nlattr *data[])

{

	struct net *net = dev_net(dev);

	struct ip6_tnl *nt, *t;

	struct ip_tunnel_encap ipencap;



	nt = netdev_priv(dev);



	if (ip6_tnl_netlink_encap_parms(data, &ipencap)) {

		int err = ip6_tnl_encap_setup(nt, &ipencap);



		if (err < 0)

			return err;

	}



	ip6_tnl_netlink_parms(data, &nt->parms);



	t = ip6_tnl_locate(net, &nt->parms, 0);
@@ -1820,10 +1862,17 @@ static int ip6_tnl_changelink(struct net_device *dev, struct nlattr *tb[], 
	struct __ip6_tnl_parm p;

	struct net *net = t->net;

	struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id);

	struct ip_tunnel_encap ipencap;



	if (dev == ip6n->fb_tnl_dev)

		return -EINVAL;



	if (ip6_tnl_netlink_encap_parms(data, &ipencap)) {

		int err = ip6_tnl_encap_setup(t, &ipencap);



		if (err < 0)

			return err;

	}

	ip6_tnl_netlink_parms(data, &p);



	t = ip6_tnl_locate(net, &p, 0);
@@ -1864,6 +1913,14 @@ static size_t ip6_tnl_get_size(const struct net_device *dev) 
		nla_total_size(4) +

		/* IFLA_IPTUN_PROTO */

		nla_total_size(1) +

		/* IFLA_IPTUN_ENCAP_TYPE */

		nla_total_size(2) +

		/* IFLA_IPTUN_ENCAP_FLAGS */

		nla_total_size(2) +

		/* IFLA_IPTUN_ENCAP_SPORT */

		nla_total_size(2) +

		/* IFLA_IPTUN_ENCAP_DPORT */

		nla_total_size(2) +

		0;

}
@@ -1881,6 +1938,17 @@ static int ip6_tnl_fill_info(struct sk_buff *skb, const struct net_device *dev) 
	    nla_put_u32(skb, IFLA_IPTUN_FLAGS, parm->flags) ||

	    nla_put_u8(skb, IFLA_IPTUN_PROTO, parm->proto))

		goto nla_put_failure;



	if (nla_put_u16(skb, IFLA_IPTUN_ENCAP_TYPE,

			tunnel->encap.type) ||

	nla_put_be16(skb, IFLA_IPTUN_ENCAP_SPORT,

		     tunnel->encap.sport) ||

	nla_put_be16(skb, IFLA_IPTUN_ENCAP_DPORT,

		     tunnel->encap.dport) ||

	nla_put_u16(skb, IFLA_IPTUN_ENCAP_FLAGS,

		    tunnel->encap.flags))

		goto nla_put_failure;



	return 0;



nla_put_failure:
@@ -1904,6 +1972,10 @@ static const struct nla_policy ip6_tnl_policy[IFLA_IPTUN_MAX + 1] = { 
	[IFLA_IPTUN_FLOWINFO]		= { .type = NLA_U32 },

	[IFLA_IPTUN_FLAGS]		= { .type = NLA_U32 },

	[IFLA_IPTUN_PROTO]		= { .type = NLA_U8 },

	[IFLA_IPTUN_ENCAP_TYPE]		= { .type = NLA_U16 },

	[IFLA_IPTUN_ENCAP_FLAGS]	= { .type = NLA_U16 },

	[IFLA_IPTUN_ENCAP_SPORT]	= { .type = NLA_U16 },

	[IFLA_IPTUN_ENCAP_DPORT]	= { .type = NLA_U16 },

};



static struct rtnl_link_ops ip6_link_ops __read_mostly = {