From 20971a0afb8bc0eeb6865ceadd435e4a2dba0fd7 Mon Sep 17 00:00:00 2001 From: Julius Volz Date: Sat, 1 Nov 2008 13:13:19 +0000 Subject: [PATCH] IPVS: Add IPv6 support to SH and DH schedulers Add IPv6 support to SH and DH schedulers. I hope this simple IPv6 address hashing is good enough. The 128 bit are just XORed into 32 before hashing them like an IPv4 address. Signed-off-by: Julius Volz Acked-by: Simon Horman Signed-off-by: David S. Miller --- net/netfilter/ipvs/ip_vs_dh.c | 30 +++++++++++++++++++++--------- net/netfilter/ipvs/ip_vs_sh.c | 30 +++++++++++++++++++++--------- 2 files changed, 42 insertions(+), 18 deletions(-) diff --git a/net/netfilter/ipvs/ip_vs_dh.c b/net/netfilter/ipvs/ip_vs_dh.c index 77179b9..d8258e0 100644 --- a/net/netfilter/ipvs/ip_vs_dh.c +++ b/net/netfilter/ipvs/ip_vs_dh.c @@ -64,9 +64,16 @@ struct ip_vs_dh_bucket { /* * Returns hash value for IPVS DH entry */ -static inline unsigned ip_vs_dh_hashkey(__be32 addr) +static inline unsigned ip_vs_dh_hashkey(int af, const union nf_inet_addr *addr) { - return (ntohl(addr)*2654435761UL) & IP_VS_DH_TAB_MASK; + __be32 addr_fold = addr->ip; + +#ifdef CONFIG_IP_VS_IPV6 + if (af == AF_INET6) + addr_fold = addr->ip6[0]^addr->ip6[1]^ + addr->ip6[2]^addr->ip6[3]; +#endif + return (ntohl(addr_fold)*2654435761UL) & IP_VS_DH_TAB_MASK; } @@ -74,9 +81,10 @@ static inline unsigned ip_vs_dh_hashkey(__be32 addr) * Get ip_vs_dest associated with supplied parameters. */ static inline struct ip_vs_dest * -ip_vs_dh_get(struct ip_vs_dh_bucket *tbl, __be32 addr) +ip_vs_dh_get(int af, struct ip_vs_dh_bucket *tbl, + const union nf_inet_addr *addr) { - return (tbl[ip_vs_dh_hashkey(addr)]).dest; + return (tbl[ip_vs_dh_hashkey(af, addr)]).dest; } @@ -202,12 +210,14 @@ ip_vs_dh_schedule(struct ip_vs_service *svc, const struct sk_buff *skb) { struct ip_vs_dest *dest; struct ip_vs_dh_bucket *tbl; - struct iphdr *iph = ip_hdr(skb); + struct ip_vs_iphdr iph; + + ip_vs_fill_iphdr(svc->af, skb_network_header(skb), &iph); IP_VS_DBG(6, "ip_vs_dh_schedule(): Scheduling...\n"); tbl = (struct ip_vs_dh_bucket *)svc->sched_data; - dest = ip_vs_dh_get(tbl, iph->daddr); + dest = ip_vs_dh_get(svc->af, tbl, &iph.daddr); if (!dest || !(dest->flags & IP_VS_DEST_F_AVAILABLE) || atomic_read(&dest->weight) <= 0 @@ -215,8 +225,10 @@ ip_vs_dh_schedule(struct ip_vs_service *svc, const struct sk_buff *skb) return NULL; } - IP_VS_DBG(6, "DH: destination IP address %pI4 --> server %pI4:%d\n", - &iph->daddr, &dest->addr.ip, ntohs(dest->port)); + IP_VS_DBG_BUF(6, "DH: destination IP address %s --> server %s:%d\n", + IP_VS_DBG_ADDR(svc->af, &iph.daddr), + IP_VS_DBG_ADDR(svc->af, &dest->addr), + ntohs(dest->port)); return dest; } @@ -232,7 +244,7 @@ static struct ip_vs_scheduler ip_vs_dh_scheduler = .module = THIS_MODULE, .n_list = LIST_HEAD_INIT(ip_vs_dh_scheduler.n_list), #ifdef CONFIG_IP_VS_IPV6 - .supports_ipv6 = 0, + .supports_ipv6 = 1, #endif .init_service = ip_vs_dh_init_svc, .done_service = ip_vs_dh_done_svc, diff --git a/net/netfilter/ipvs/ip_vs_sh.c b/net/netfilter/ipvs/ip_vs_sh.c index be5863c..4074ccf 100644 --- a/net/netfilter/ipvs/ip_vs_sh.c +++ b/net/netfilter/ipvs/ip_vs_sh.c @@ -61,9 +61,16 @@ struct ip_vs_sh_bucket { /* * Returns hash value for IPVS SH entry */ -static inline unsigned ip_vs_sh_hashkey(__be32 addr) +static inline unsigned ip_vs_sh_hashkey(int af, const union nf_inet_addr *addr) { - return (ntohl(addr)*2654435761UL) & IP_VS_SH_TAB_MASK; + __be32 addr_fold = addr->ip; + +#ifdef CONFIG_IP_VS_IPV6 + if (af == AF_INET6) + addr_fold = addr->ip6[0]^addr->ip6[1]^ + addr->ip6[2]^addr->ip6[3]; +#endif + return (ntohl(addr_fold)*2654435761UL) & IP_VS_SH_TAB_MASK; } @@ -71,9 +78,10 @@ static inline unsigned ip_vs_sh_hashkey(__be32 addr) * Get ip_vs_dest associated with supplied parameters. */ static inline struct ip_vs_dest * -ip_vs_sh_get(struct ip_vs_sh_bucket *tbl, __be32 addr) +ip_vs_sh_get(int af, struct ip_vs_sh_bucket *tbl, + const union nf_inet_addr *addr) { - return (tbl[ip_vs_sh_hashkey(addr)]).dest; + return (tbl[ip_vs_sh_hashkey(af, addr)]).dest; } @@ -199,12 +207,14 @@ ip_vs_sh_schedule(struct ip_vs_service *svc, const struct sk_buff *skb) { struct ip_vs_dest *dest; struct ip_vs_sh_bucket *tbl; - struct iphdr *iph = ip_hdr(skb); + struct ip_vs_iphdr iph; + + ip_vs_fill_iphdr(svc->af, skb_network_header(skb), &iph); IP_VS_DBG(6, "ip_vs_sh_schedule(): Scheduling...\n"); tbl = (struct ip_vs_sh_bucket *)svc->sched_data; - dest = ip_vs_sh_get(tbl, iph->saddr); + dest = ip_vs_sh_get(svc->af, tbl, &iph.saddr); if (!dest || !(dest->flags & IP_VS_DEST_F_AVAILABLE) || atomic_read(&dest->weight) <= 0 @@ -212,8 +222,10 @@ ip_vs_sh_schedule(struct ip_vs_service *svc, const struct sk_buff *skb) return NULL; } - IP_VS_DBG(6, "SH: source IP address %pI4 --> server %pI4:%d\n", - &iph->saddr, &dest->addr.ip, ntohs(dest->port)); + IP_VS_DBG_BUF(6, "SH: source IP address %s --> server %s:%d\n", + IP_VS_DBG_ADDR(svc->af, &iph.saddr), + IP_VS_DBG_ADDR(svc->af, &dest->addr), + ntohs(dest->port)); return dest; } @@ -229,7 +241,7 @@ static struct ip_vs_scheduler ip_vs_sh_scheduler = .module = THIS_MODULE, .n_list = LIST_HEAD_INIT(ip_vs_sh_scheduler.n_list), #ifdef CONFIG_IP_VS_IPV6 - .supports_ipv6 = 0, + .supports_ipv6 = 1, #endif .init_service = ip_vs_sh_init_svc, .done_service = ip_vs_sh_done_svc, -- 2.7.4