1 files changed, 10 insertions, 34 deletions

diff --git a/net/ipv4/xfrm4_mode_tunnel.c b/net/ipv4/xfrm4_mode_tunnel.c
index cc8bbb274e37..aa335dba8ffa 100644
--- a/net/ipv4/xfrm4_mode_tunnel.c
+++ b/net/ipv4/xfrm4_mode_tunnel.c
@@ -16,19 +16,12 @@
 
 static inline void ipip_ecn_decapsulate(struct sk_buff *skb)
 {
-        struct iphdr *outer_iph = ip_hdr(skb);
         struct iphdr *inner_iph = ipip_hdr(skb);
 
-        if (INET_ECN_is_ce(outer_iph->tos))
+        if (INET_ECN_is_ce(XFRM_MODE_SKB_CB(skb)->tos))
                 IP_ECN_set_ce(inner_iph);
 }
 
-static inline void ipip6_ecn_decapsulate(struct iphdr *iph, struct sk_buff *skb)
-{
-        if (INET_ECN_is_ce(iph->tos))
-                IP6_ECN_set_ce(ipv6_hdr(skb));
-}
-
 /* Add encapsulation header.
  *
  * The top IP header will be constructed per RFC 2401.
@@ -72,20 +65,11 @@ static int xfrm4_tunnel_output(struct xfrm_state *x, struct sk_buff *skb)
 
 static int xfrm4_tunnel_input(struct xfrm_state *x, struct sk_buff *skb)
 {
-        struct iphdr *iph = ip_hdr(skb);
         const unsigned char *old_mac;
         int err = -EINVAL;
 
-        switch (iph->protocol){
-                case IPPROTO_IPIP:
-                        break;
-#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
-                case IPPROTO_IPV6:
-                        break;
-#endif
-                default:
-                        goto out;
-        }
+        if (XFRM_MODE_SKB_CB(skb)->protocol != IPPROTO_IPIP)
+                goto out;
 
         if (!pskb_may_pull(skb, sizeof(struct iphdr)))
                 goto out;
@@ -94,20 +78,11 @@ static int xfrm4_tunnel_input(struct xfrm_state *x, struct sk_buff *skb)
             (err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC)))
                 goto out;
 
-        iph = ip_hdr(skb);
-        if (iph->protocol == IPPROTO_IPIP) {
-                if (x->props.flags & XFRM_STATE_DECAP_DSCP)
-                        ipv4_copy_dscp(ipv4_get_dsfield(iph), ipip_hdr(skb));
-                if (!(x->props.flags & XFRM_STATE_NOECN))
-                        ipip_ecn_decapsulate(skb);
-        }
-#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
-        else {
-                if (!(x->props.flags & XFRM_STATE_NOECN))
-                        ipip6_ecn_decapsulate(iph, skb);
-                skb->protocol = htons(ETH_P_IPV6);
-        }
-#endif
+        if (x->props.flags & XFRM_STATE_DECAP_DSCP)
+                ipv4_copy_dscp(XFRM_MODE_SKB_CB(skb)->tos, ipip_hdr(skb));
+        if (!(x->props.flags & XFRM_STATE_NOECN))
+                ipip_ecn_decapsulate(skb);
+
         old_mac = skb_mac_header(skb);
         skb_set_mac_header(skb, -skb->mac_len);
         memmove(skb_mac_header(skb), old_mac, skb->mac_len);
@@ -119,7 +94,8 @@ out:
 }
 
 static struct xfrm_mode xfrm4_tunnel_mode = {
-        .input = xfrm4_tunnel_input,
+        .input2 = xfrm4_tunnel_input,
+        .input = xfrm_prepare_input,
         .output2 = xfrm4_tunnel_output,
         .output = xfrm4_prepare_output,
         .owner = THIS_MODULE,