Commit b79a7947 authored Aug 06, 2009 by Jussi Mäki Committed by David S. Miller Aug 09, 2009

Fix xfrm hash collisions by changing __xfrm4_daddr_saddr_hash to hash addresses with addition



This patch fixes hash collisions in cases where number
of entries have incrementing IP source and destination addresses
from single respective subnets (i.e. 192.168.0.1-172.16.0.1,
192.168.0.2-172.16.0.2, and so on.).

Signed-off-by: Jussi Maki <joamaki@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 082ba88a

net/xfrm/xfrm_hash.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -16,7 +16,7 @@ static inline unsigned int __xfrm6_addr_hash(xfrm_address_t *addr)

		static inline unsigned int __xfrm4_daddr_saddr_hash(xfrm_address_t daddr, xfrm_address_t saddr)
		{
		return ntohl(daddr->a4 ^ saddr->a4);
		return ntohl(daddr->a4 + saddr->a4);
		}

		static inline unsigned int __xfrm6_daddr_saddr_hash(xfrm_address_t daddr, xfrm_address_t saddr)