From b79a79471bd31d737c939a6ddc347417047b4320 Mon Sep 17 00:00:00 2001
From: Jussi Mäki <joamaki@gmail.com>
Date: Thu, 6 Aug 2009 21:38:14 +0000
Subject: 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>
---
net/xfrm/xfrm_hash.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
(limited to 'net/xfrm/xfrm_hash.h')
diff --git a/net/xfrm/xfrm_hash.h b/net/xfrm/xfrm_hash.h
index d401dc8f05e..e5195c99f71 100644
--- a/net/xfrm/xfrm_hash.h
+++ b/net/xfrm/xfrm_hash.h
@@ -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)
--
cgit v1.2.3-70-g09d2