tree 4ebe390a9b328bba32d149b9f83e998836806f5d
parent d565b0a1a9b6ee7dff46e1f68b26b526ac11ae50
author Herbert Xu <herbert@gondor.apana.org.au> 1229413269 -0800
committer David S. Miller <davem@davemloft.net> 1229413269 -0800

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>