From: Harald Welte Date: Tue, 21 Mar 2006 01:14:12 +0000 (-0800) Subject: [NETFILTER] NAT sequence adjustment: Save eight bytes per conntrack X-Git-Tag: firefly_0821_release~37598^2~202 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=5ee956125a780baf15f2c1d09f2cbf8adcf598fe;p=firefly-linux-kernel-4.4.55.git [NETFILTER] NAT sequence adjustment: Save eight bytes per conntrack This patch reduces the size of 'struct ip_conntrack' on systems with NAT by eight bytes. The sequence number delta values can be int16_t, since we only support one sequence number modification per window anyway, and one such modification is not going to exceed 32kB ;) Signed-off-by: Harald Welte Signed-off-by: David S. Miller --- diff --git a/include/linux/netfilter_ipv4/ip_nat.h b/include/linux/netfilter_ipv4/ip_nat.h index 41a107de17cf..e9f5ed1d9f68 100644 --- a/include/linux/netfilter_ipv4/ip_nat.h +++ b/include/linux/netfilter_ipv4/ip_nat.h @@ -23,7 +23,7 @@ struct ip_nat_seq { * modification (if any) */ u_int32_t correction_pos; /* sequence number offset before and after last modification */ - int32_t offset_before, offset_after; + int16_t offset_before, offset_after; }; /* Single range specification. */