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authorBen Hutchings <bhutchings@solarflare.com>2008-06-19 16:22:28 -0700
committerDavid S. Miller <davem@davemloft.net>2008-06-19 16:22:28 -0700
commit4497b0763cb1afae463f5e144c28b5d806e28b60 (patch)
tree3e86c53b5eb461eac7523885e43f36033cc03968 /include/linux/skbuff.h
parent0187bdfb05674147774ca79a79942537f3ad54bd (diff)
net: Discard and warn about LRO'd skbs received for forwarding
Add skb_warn_if_lro() to test whether an skb was received with LRO and warn if so. Change br_forward(), ip_forward() and ip6_forward() to call it) and discard the skb if it returns true. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/skbuff.h')
-rw-r--r--include/linux/skbuff.h14
1 files changed, 14 insertions, 0 deletions
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 299ec4b3141..2220b9e2dab 100644
--- 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? */