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vxlan: simplify RTF_LOCAL handling.

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Avoid code duplicate code for handling RTF_LOCAL routes.

Signed-off-by: Pravin B Shelar <pshelar@ovn.org>
Acked-by: Jiri Benc <jbenc@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
pravin shelar 2016-11-13 20:43:56 -08:00 committed by David S. Miller
parent 655c3de165
commit fee1fad7c7
1 changed files with 51 additions and 34 deletions
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85
drivers/net/vxlan.c
View file

@ -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;
/* 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);
return;
}
if (!info)
if (!info) {
err = encap_bypass_if_local(skb, dev, vxlan, dst,
dst_port, vni, &rt->dst,
rt->rt_flags);
if (err)
return;
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);
return;
}
if (!info)
err = encap_bypass_if_local(skb, dev, vxlan, dst,
dst_port, vni, ndst,
rt6i_flags);
if (err)
return;
udp_sum = !(flags & VXLAN_F_UDP_ZERO_CSUM6_TX);
}
tos = ip_tunnel_ecn_encap(tos, old_iph, skb);
ttl = ttl ? : ip6_dst_hoplimit(ndst);