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authorHerbert Xu <herbert@gondor.apana.org.au>2008-12-15 23:41:09 -0800
committerDavid S. Miller <davem@davemloft.net>2008-12-15 23:41:09 -0800
commit73cc19f1556b95976934de236fd9043f7208844f (patch)
tree4ebe390a9b328bba32d149b9f83e998836806f5d /include
parentd565b0a1a9b6ee7dff46e1f68b26b526ac11ae50 (diff)
ipv4: Add GRO infrastructure
This patch adds GRO support for IPv4. The criteria for merging is more stringent than LRO, in particular, we require all fields in the IP header to be identical except for the length, ID and checksum. In addition, the ID must form an arithmetic sequence with a difference of one. The ID requirement might seem overly strict, however, most hardware TSO solutions already obey this rule. Linux itself also obeys this whether GSO is in use or not. In future we could relax this rule by storing the IDs (or rather making sure that we don't drop them when pulling the aggregate skb's tail). Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
-rw-r--r--include/net/protocol.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/net/protocol.h b/include/net/protocol.h
index 8d024d7cb741..cb2965aa1b62 100644
--- a/include/net/protocol.h
+++ b/include/net/protocol.h
@@ -39,6 +39,9 @@ struct net_protocol {
int (*gso_send_check)(struct sk_buff *skb);
struct sk_buff *(*gso_segment)(struct sk_buff *skb,
int features);
+ struct sk_buff **(*gro_receive)(struct sk_buff **head,
+ struct sk_buff *skb);
+ int (*gro_complete)(struct sk_buff *skb);
unsigned int no_policy:1,
netns_ok:1;
};