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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 <julius.volz@xxxxxxxxx>
---
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,
--
1.5.3.7
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