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Commit fee1fad7 authored by pravin shelar's avatar pravin shelar Committed by David S. Miller
Browse files

vxlan: simplify RTF_LOCAL handling. 



Avoid code duplicate code for handling RTF_LOCAL routes.

Signed-off-by: default avatarPravin B Shelar <pshelar@ovn.org>
Acked-by: default avatarJiri Benc <jbenc@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 655c3de1

drivers/net/vxlan.c

+51 −34
Original line number Diff line number Diff line
@@ -1940,6 +1940,40 @@ static void vxlan_encap_bypass(struct sk_buff *skb, struct vxlan_dev *src_vxlan, 
	}

}



static int encap_bypass_if_local(struct sk_buff *skb, struct net_device *dev,

				 struct vxlan_dev *vxlan, union vxlan_addr *daddr,

				 __be32 dst_port, __be32 vni, struct dst_entry *dst,

				 u32 rt_flags)

{

#if IS_ENABLED(CONFIG_IPV6)

	/* IPv6 rt-flags are checked against RTF_LOCAL, but the value of

	 * RTF_LOCAL is equal to RTCF_LOCAL. So to keep code simple

	 * we can use RTCF_LOCAL which works for ipv4 and ipv6 route entry.

	 */

	BUILD_BUG_ON(RTCF_LOCAL != RTF_LOCAL);

#endif

	/* Bypass encapsulation if the destination is local */

	if (rt_flags & RTCF_LOCAL &&

	    !(rt_flags & (RTCF_BROADCAST | RTCF_MULTICAST))) {

		struct vxlan_dev *dst_vxlan;



		dst_release(dst);

		dst_vxlan = vxlan_find_vni(vxlan->net, vni,

					   daddr->sa.sa_family, dst_port,

					   vxlan->flags);

		if (!dst_vxlan) {

			dev->stats.tx_errors++;

			kfree_skb(skb);



			return -ENOENT;

		}

		vxlan_encap_bypass(skb, vxlan, dst_vxlan);

		return 1;

	}



	return 0;

}



static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,

			   struct vxlan_rdst *rdst, bool did_rsc)

{
@@ -2038,27 +2072,19 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev, 
				     dst_cache, info);

		if (IS_ERR(rt))

			goto tx_error;

		sk = sock4->sock->sk;



		sk = sock4->sock->sk;

		/* Bypass encapsulation if the destination is local */

		if (!info && rt->rt_flags & RTCF_LOCAL &&

		    !(rt->rt_flags & (RTCF_BROADCAST | RTCF_MULTICAST))) {

			struct vxlan_dev *dst_vxlan;



			ip_rt_put(rt);

			dst_vxlan = vxlan_find_vni(vxlan->net, vni,

						   dst->sa.sa_family, dst_port,

						   vxlan->flags);

			if (!dst_vxlan)

				goto tx_error;

			vxlan_encap_bypass(skb, vxlan, dst_vxlan);

		if (!info) {

			err = encap_bypass_if_local(skb, dev, vxlan, dst,

						    dst_port, vni, &rt->dst,

						    rt->rt_flags);

			if (err)

				return;

		}



		if (!info)

			udp_sum = !(flags & VXLAN_F_UDP_ZERO_CSUM_TX);

		else if (info->key.tun_flags & TUNNEL_DONT_FRAGMENT)

		} else if (info->key.tun_flags & TUNNEL_DONT_FRAGMENT) {

			df = htons(IP_DF);

		}



		ndst = &rt->dst;

		tos = ip_tunnel_ecn_encap(tos, old_iph, skb);
@@ -2074,7 +2100,6 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev, 
#if IS_ENABLED(CONFIG_IPV6)

	} else {

		struct vxlan_sock *sock6 = rcu_dereference(vxlan->vn6_sock);

		u32 rt6i_flags;



		ndst = vxlan6_get_route(vxlan, dev, sock6, skb,

					rdst ? rdst->remote_ifindex : 0, tos,
@@ -2087,24 +2112,16 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev, 
		}

		sk = sock6->sock->sk;



		/* Bypass encapsulation if the destination is local */

		rt6i_flags = ((struct rt6_info *)ndst)->rt6i_flags;

		if (!info && rt6i_flags & RTF_LOCAL &&

		    !(rt6i_flags & (RTCF_BROADCAST | RTCF_MULTICAST))) {

			struct vxlan_dev *dst_vxlan;

		if (!info) {

			u32 rt6i_flags = ((struct rt6_info *)ndst)->rt6i_flags;



			dst_vxlan = vxlan_find_vni(vxlan->net, vni,

						   dst->sa.sa_family, dst_port,

						   vxlan->flags);

			if (!dst_vxlan)

				goto tx_error;

			dst_release(ndst);

			vxlan_encap_bypass(skb, vxlan, dst_vxlan);

			err = encap_bypass_if_local(skb, dev, vxlan, dst,

						    dst_port, vni, ndst,

						    rt6i_flags);

			if (err)

				return;

		}



		if (!info)

			udp_sum = !(flags & VXLAN_F_UDP_ZERO_CSUM6_TX);

		}



		tos = ip_tunnel_ecn_encap(tos, old_iph, skb);

		ttl = ttl ? : ip6_dst_hoplimit(ndst);