Existing vxlan xmit function handles two distinct cases.
1. vxlan net device
2. vxlan lwt device.
By seperating initilization these two cases the egress path
looks better.
Signed-off-by: Pravin B Shelar <pshe...@ovn.org>
---
drivers/net/vxlan.c | 79 ++++++++++++++++++++++++-----------------------------
1 file changed, 35 insertions(+), 44 deletions(-)
diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c
index d496763..7bba92b 100644
--- a/drivers/net/vxlan.c
+++ b/drivers/net/vxlan.c
@@ -1978,8 +1978,7 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct
net_device *dev,
struct dst_cache *dst_cache;
struct ip_tunnel_info *info;
struct vxlan_dev *vxlan = netdev_priv(dev);
- struct sock *sk;
- const struct iphdr *old_iph;
+ const struct iphdr *old_iph = ip_hdr(skb);
union vxlan_addr *dst;
union vxlan_addr remote_ip, local_ip;
union vxlan_addr *src;
@@ -1987,7 +1986,6 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct
net_device *dev,
struct vxlan_metadata *md = &_md;
__be16 src_port = 0, dst_port;
__be32 vni, label;
- __be16 df = 0;
__u8 tos, ttl;
int err;
u32 flags = vxlan->flags;
@@ -1997,11 +1995,34 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct
net_device *dev,
info = skb_tunnel_info(skb);
if (rdst) {
+ dst = &rdst->remote_ip;
+ if (vxlan_addr_any(dst)) {
+ if (did_rsc) {
+ /* short-circuited back to local bridge */
+ vxlan_encap_bypass(skb, vxlan, vxlan);
+ return;
+ }
+ goto drop;
+ }
+
dst_port = rdst->remote_port ? rdst->remote_port :
vxlan->cfg.dst_port;
vni = rdst->remote_vni;
- dst = &rdst->remote_ip;
src = &vxlan->cfg.saddr;
dst_cache = &rdst->dst_cache;
+ md->gbp = skb->mark;
+ ttl = vxlan->cfg.ttl;
+ if (!ttl && vxlan_addr_multicast(dst))
+ ttl = 1;
+
+ tos = vxlan->cfg.tos;
+ if (tos == 1)
+ tos = ip_tunnel_get_dsfield(old_iph, skb);
+
+ if (dst->sa.sa_family == AF_INET)
+ udp_sum = !(flags & VXLAN_F_UDP_ZERO_CSUM_TX);
+ else
+ udp_sum = !(flags & VXLAN_F_UDP_ZERO_CSUM6_TX);
+ label = vxlan->cfg.label;
} else {
if (!info) {
WARN_ONCE(1, "%s: Missing encapsulation instructions\n",
@@ -2021,32 +2042,6 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct
net_device *dev,
dst = &remote_ip;
src = &local_ip;
dst_cache = &info->dst_cache;
- }
-
- if (vxlan_addr_any(dst)) {
- if (did_rsc) {
- /* short-circuited back to local bridge */
- vxlan_encap_bypass(skb, vxlan, vxlan);
- return;
- }
- goto drop;
- }
-
- old_iph = ip_hdr(skb);
-
- ttl = vxlan->cfg.ttl;
- if (!ttl && vxlan_addr_multicast(dst))
- ttl = 1;
-
- tos = vxlan->cfg.tos;
- if (tos == 1)
- tos = ip_tunnel_get_dsfield(old_iph, skb);
-
- label = vxlan->cfg.label;
- src_port = udp_flow_src_port(dev_net(dev), skb, vxlan->cfg.port_min,
- vxlan->cfg.port_max, true);
-
- if (info) {
ttl = info->key.ttl;
tos = info->key.tos;
label = info->key.label;
@@ -2054,15 +2049,15 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct
net_device *dev,
if (info->options_len)
md = ip_tunnel_info_opts(info);
- } else {
- md->gbp = skb->mark;
}
+ src_port = udp_flow_src_port(dev_net(dev), skb, vxlan->cfg.port_min,
+ vxlan->cfg.port_max, true);
+
if (dst->sa.sa_family == AF_INET) {
struct vxlan_sock *sock4 = rcu_dereference(vxlan->vn4_sock);
struct rtable *rt;
-
- sk = sock4->sock->sk;
+ __be16 df = 0;
rt = vxlan_get_route(vxlan, dev, sock4, skb,
rdst ? rdst->remote_ifindex : 0, tos,
@@ -2078,18 +2073,17 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct
net_device *dev,
rt->rt_flags);
if (err)
return;
- udp_sum = !(flags & VXLAN_F_UDP_ZERO_CSUM_TX);
} else if (info->key.tun_flags & TUNNEL_DONT_FRAGMENT) {
df = htons(IP_DF);
}
- tos = ip_tunnel_ecn_encap(tos, old_iph, skb);
- ttl = ttl ? : ip4_dst_hoplimit(&rt->dst);
err = vxlan_build_skb(skb, &rt->dst, sizeof(struct iphdr),
vni, md, flags, udp_sum);
if (err < 0)
goto tx_error;
- udp_tunnel_xmit_skb(rt, sk, skb, src->sin.sin_addr.s_addr,
+ tos = ip_tunnel_ecn_encap(tos, old_iph, skb);
+ ttl = ttl ? : ip4_dst_hoplimit(&rt->dst);
+ udp_tunnel_xmit_skb(rt, sock4->sock->sk, skb,
src->sin.sin_addr.s_addr,
dst->sin.sin_addr.s_addr, tos, ttl, df,
src_port, dst_port, xnet, !udp_sum);
#if IS_ENABLED(CONFIG_IPV6)
@@ -2097,8 +2091,6 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct
net_device *dev,
struct vxlan_sock *sock6 = rcu_dereference(vxlan->vn6_sock);
struct dst_entry *ndst;
- sk = sock6->sock->sk;
-
ndst = vxlan6_get_route(vxlan, dev, sock6, skb,
rdst ? rdst->remote_ifindex : 0, tos,
label, &dst->sin6.sin6_addr,
@@ -2115,18 +2107,17 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct
net_device *dev,
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);
skb_scrub_packet(skb, xnet);
err = vxlan_build_skb(skb, ndst, sizeof(struct ipv6hdr),
vni, md, flags, udp_sum);
if (err < 0)
goto tx_error;
- udp_tunnel6_xmit_skb(ndst, sk, skb, dev,
+ tos = ip_tunnel_ecn_encap(tos, old_iph, skb);
+ ttl = ttl ? : ip6_dst_hoplimit(ndst);
+ udp_tunnel6_xmit_skb(ndst, sock6->sock->sk, skb, dev,
&src->sin6.sin6_addr,
&dst->sin6.sin6_addr, tos, ttl,
label, src_port, dst_port, !udp_sum);
--
1.9.1
