[PATCH 23/26] IPVS: Add hash functions for IPv6 services and real servers.
From: Julius R. Volz <hidden>
Date: 2008-06-11 17:12:06
Also in:
lvs-devel
Subsystem:
ipvs, netfilter, networking [general], the rest · Maintainers:
Simon Horman, Julian Anastasov, Pablo Neira Ayuso, Florian Westphal, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
Add hashing functions ip_vs_svc_hashkey_v6() for hashing IPv6 service entries and ip_vs_rs_hashkey_v6() for hashing real servers. Signed-off-by: Julius R. Volz <redacted> 1 files changed, 46 insertions(+), 2 deletions(-)
diff --git a/net/netfilter/ipvs/ip_vs_ctl.c b/net/netfilter/ipvs/ip_vs_ctl.c
index cf52034..ca198b9 100644
--- a/net/netfilter/ipvs/ip_vs_ctl.c
+++ b/net/netfilter/ipvs/ip_vs_ctl.c@@ -37,6 +37,10 @@ #include <net/net_namespace.h> #include <net/ip.h> +#ifdef CONFIG_IP_VS_IPV6 +#include <net/ipv6.h> +#include <net/ip6_route.h> +#endif #include <net/route.h> #include <net/sock.h>
@@ -308,6 +312,20 @@ ip_vs_svc_hashkey(unsigned proto, __be32 addr, __be16 port) & IP_VS_SVC_TAB_MASK; } +#ifdef CONFIG_IP_VS_IPV6 +static __inline__ unsigned +ip_vs_svc_hashkey_v6(unsigned proto, const struct in6_addr *addr, __be16 port) +{ + register unsigned porth = ntohs(port); + + /* TODO IPv6: is this a good way to hash IPv6 entries? */ + int addr_fold = addr->s6_addr32[0]^addr->s6_addr32[1]^ + addr->s6_addr32[2]^addr->s6_addr32[3]; + return (proto^ntohl(addr_fold)^(porth>>IP_VS_SVC_TAB_BITS)^porth) + & IP_VS_SVC_TAB_MASK; +} +#endif + /* * Returns hash value of fwmark for virtual service lookup */
@@ -335,7 +353,13 @@ static int ip_vs_svc_hash(struct ip_vs_service *svc) /* * Hash it by <protocol,addr,port> in ip_vs_svc_table */ - hash = ip_vs_svc_hashkey(svc->protocol, svc->addr, svc->port); +#ifdef CONFIG_IP_VS_IPV6 + hash = (svc->af == AF_INET) + ? ip_vs_svc_hashkey(svc->protocol, svc->addr.v4, svc->port) + : ip_vs_svc_hashkey_v6(svc->protocol, &svc->addr.v6, svc->port); +#else + hash = ip_vs_svc_hashkey(svc->protocol, svc->addr.v4, svc->port); +#endif list_add(&svc->s_list, &ip_vs_svc_table[hash]); } else { /*
@@ -506,6 +530,20 @@ static __inline__ unsigned ip_vs_rs_hashkey(__be32 addr, __be16 port) & IP_VS_RTAB_MASK; } +#ifdef CONFIG_IP_VS_IPV6 +static __inline__ unsigned ip_vs_rs_hashkey_v6(const struct in6_addr *addr, + __be16 port) +{ + register unsigned porth = ntohs(port); + + /* TODO IPv6: is this a good way to hash IPv6 entries? */ + int addr_fold = addr->s6_addr32[0]^addr->s6_addr32[1]^ + addr->s6_addr32[2]^addr->s6_addr32[3]; + return (ntohl(addr_fold)^(porth>>IP_VS_RTAB_BITS)^porth) + & IP_VS_RTAB_MASK; +} +#endif + /* * Hashes ip_vs_dest in ip_vs_rtable by <proto,addr,port>. * should be called with locked tables.
@@ -522,7 +560,13 @@ static int ip_vs_rs_hash(struct ip_vs_dest *dest) * Hash by proto,addr,port, * which are the parameters of the real service. */ - hash = ip_vs_rs_hashkey(dest->addr, dest->port); +#ifdef CONFIG_IP_VS_IPV6 + if (dest->af == AF_INET6) + hash = ip_vs_rs_hashkey_v6(&dest->addr.v6, dest->port); + else +#endif + hash = ip_vs_rs_hashkey(dest->addr.v4, dest->port); + list_add(&dest->d_list, &ip_vs_rtable[hash]); return 1;
--
1.5.3.6