[PATCH net-next] openvswitch: Derive IP protocol number for IPv6 later frags

[Yi-Hung Wei <yihung.wei@gmail.com>]

Currently, OVS only parses the IP protocol number for the first
IPv6 fragment, but sets the IP protocol number for the later fragments
to be NEXTHDF_FRAGMENT.  This patch tries to derive the IP protocol
number for the IPV6 later frags so that we can match that.

Signed-off-by: Yi-Hung Wei <yihung.wei@gmail.com>
---
 net/openvswitch/flow.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/net/openvswitch/flow.c b/net/openvswitch/flow.c
index 56b8e7167790..3d654c4f71be 100644
--- a/net/openvswitch/flow.c
+++ b/net/openvswitch/flow.c
@@ -297,7 +297,13 @@ static int parse_ipv6hdr(struct sk_buff *skb, struct sw_flow_key *key)
 
 	nh_len = payload_ofs - nh_ofs;
 	skb_set_transport_header(skb, nh_ofs + nh_len);
-	key->ip.proto = nexthdr;
+	if (key->ip.frag == OVS_FRAG_TYPE_LATER) {
+		unsigned int offset = 0;
+
+		key->ip.proto = ipv6_find_hdr(skb, &offset, -1, NULL, NULL);
+	} else {
+		key->ip.proto = nexthdr;
+	}
 	return nh_len;
 }
 
-- 
2.7.4