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-rw-r--r--net/xfrm/xfrm_output.c30
1 files changed, 25 insertions, 5 deletions
diff --git a/net/xfrm/xfrm_output.c b/net/xfrm/xfrm_output.c
index 229544bc70c2..4dc4a7bbe51c 100644
--- a/net/xfrm/xfrm_output.c
+++ b/net/xfrm/xfrm_output.c
@@ -647,10 +647,12 @@ static int xfrm_output_gso(struct net *net, struct sock *sk, struct sk_buff *skb
* This requires hardware to know the inner packet type to calculate
* the inner header checksum. Save inner ip protocol here to avoid
* traversing the packet in the vendor's xmit code.
- * If the encap type is IPIP, just save skb->inner_ipproto. Otherwise,
- * get the ip protocol from the IP header.
+ * For IPsec tunnel mode save the ip protocol from the IP header of the
+ * plain text packet. Otherwise If the encap type is IPIP, just save
+ * skb->inner_ipproto in any other case get the ip protocol from the IP
+ * header.
*/
-static void xfrm_get_inner_ipproto(struct sk_buff *skb)
+static void xfrm_get_inner_ipproto(struct sk_buff *skb, struct xfrm_state *x)
{
struct xfrm_offload *xo = xfrm_offload(skb);
const struct ethhdr *eth;
@@ -658,6 +660,25 @@ static void xfrm_get_inner_ipproto(struct sk_buff *skb)
if (!xo)
return;
+ if (x->outer_mode.encap == XFRM_MODE_TUNNEL) {
+ switch (x->outer_mode.family) {
+ case AF_INET:
+ xo->inner_ipproto = ip_hdr(skb)->protocol;
+ break;
+ case AF_INET6:
+ xo->inner_ipproto = ipv6_hdr(skb)->nexthdr;
+ break;
+ default:
+ break;
+ }
+
+ return;
+ }
+
+ /* non-Tunnel Mode */
+ if (!skb->encapsulation)
+ return;
+
if (skb->inner_protocol_type == ENCAP_TYPE_IPPROTO) {
xo->inner_ipproto = skb->inner_ipproto;
return;
@@ -712,8 +733,7 @@ int xfrm_output(struct sock *sk, struct sk_buff *skb)
sp->xvec[sp->len++] = x;
xfrm_state_hold(x);
- if (skb->encapsulation)
- xfrm_get_inner_ipproto(skb);
+ xfrm_get_inner_ipproto(skb, x);
skb->encapsulation = 1;
if (skb_is_gso(skb)) {