net: Discard and warn about LRO'd skbs received for forwarding

[linux-2.6] / include / linux / skbuff.h

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 299ec4b314123e31bf014153ab28a328ea050f26..2220b9e2dab095b6c2c0bea11fe1e0f4417145b4 100644 (file)
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -1702,6 +1702,20 @@ static inline int skb_is_gso_v6(const struct sk_buff *skb)
        return skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6;
 }
 
+extern void __skb_warn_lro_forwarding(const struct sk_buff *skb);
+
+static inline bool skb_warn_if_lro(const struct sk_buff *skb)
+{
+       /* LRO sets gso_size but not gso_type, whereas if GSO is really
+        * wanted then gso_type will be set. */
+       struct skb_shared_info *shinfo = skb_shinfo(skb);
+       if (shinfo->gso_size != 0 && unlikely(shinfo->gso_type == 0)) {
+               __skb_warn_lro_forwarding(skb);
+               return true;
+       }
+       return false;
+}
+
 static inline void skb_forward_csum(struct sk_buff *skb)
 {
        /* Unfortunately we don't support this one.  Any brave souls? */