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-rw-r--r--net/ipv4/netfilter/ipt_CLUSTERIP.c2
-rw-r--r--net/ipv4/netfilter/nf_nat_core.c10
2 files changed, 8 insertions, 4 deletions
diff --git a/net/ipv4/netfilter/ipt_CLUSTERIP.c b/net/ipv4/netfilter/ipt_CLUSTERIP.c
index a48e26449fd..df39ca07fb1 100644
--- a/net/ipv4/netfilter/ipt_CLUSTERIP.c
+++ b/net/ipv4/netfilter/ipt_CLUSTERIP.c
@@ -273,7 +273,7 @@ clusterip_hashfn(const struct sk_buff *skb,
}
/* node numbers are 1..n, not 0..n */
- return (hashval % config->num_total_nodes) + 1;
+ return (((u64)hashval * config->num_total_nodes) >> 32) + 1;
}
static inline int
diff --git a/net/ipv4/netfilter/nf_nat_core.c b/net/ipv4/netfilter/nf_nat_core.c
index aec157d0ad9..e53ae1ef8f5 100644
--- a/net/ipv4/netfilter/nf_nat_core.c
+++ b/net/ipv4/netfilter/nf_nat_core.c
@@ -77,10 +77,13 @@ EXPORT_SYMBOL_GPL(nf_nat_proto_put);
static inline unsigned int
hash_by_src(const struct nf_conntrack_tuple *tuple)
{
+ unsigned int hash;
+
/* Original src, to ensure we map it consistently if poss. */
- return jhash_3words((__force u32)tuple->src.u3.ip,
+ hash = jhash_3words((__force u32)tuple->src.u3.ip,
(__force u32)tuple->src.u.all,
- tuple->dst.protonum, 0) % nf_nat_htable_size;
+ tuple->dst.protonum, 0);
+ return ((u64)hash * nf_nat_htable_size) >> 32;
}
/* Is this tuple already taken? (not by us) */
@@ -211,7 +214,8 @@ find_best_ips_proto(struct nf_conntrack_tuple *tuple,
maxip = ntohl(range->max_ip);
j = jhash_2words((__force u32)tuple->src.u3.ip,
(__force u32)tuple->dst.u3.ip, 0);
- *var_ipp = htonl(minip + j % (maxip - minip + 1));
+ j = ((u64)j * (maxip - minip + 1)) >> 32;
+ *var_ipp = htonl(minip + j);
}
/* Manipulate the tuple into the range given. For NF_INET_POST_ROUTING,