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IPVS: Add IPv6 support to xmit() support functions

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Add IPv6 support to IP_VS_XMIT() and to the xmit routing cache, introducing
a new function __ip_vs_get_out_rt_v6().

Signed-off-by: Julius Volz <juliusv@google.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
This commit is contained in:
Julius Volz 2008-09-02 15:55:44 +02:00 committed by Simon Horman
parent 28364a59f3
commit 38cdcc9a03
1 changed files with 75 additions and 7 deletions
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82
net/ipv4/ipvs/ip_vs_xmit.c
View file

@ -20,6 +20,9 @@
#include <net/udp.h>
#include <net/icmp.h> /* for icmp_send */
#include <net/route.h> /* for ip_route_output */
#include <net/ipv6.h>
#include <net/ip6_route.h>
#include <linux/icmpv6.h>
#include <linux/netfilter.h>
#include <linux/netfilter_ipv4.h>
@ -47,7 +50,8 @@ __ip_vs_dst_check(struct ip_vs_dest *dest, u32 rtos, u32 cookie)
if (!dst)
return NULL;
if ((dst->obsolete || rtos != dest->dst_rtos) &&
if ((dst->obsolete
|| (dest->af == AF_INET && rtos != dest->dst_rtos)) &&
dst->ops->check(dst, cookie) == NULL) {
dest->dst_cache = NULL;
dst_release(dst);
@ -109,6 +113,70 @@ __ip_vs_get_out_rt(struct ip_vs_conn *cp, u32 rtos)
return rt;
}
#ifdef CONFIG_IP_VS_IPV6
static struct rt6_info *
__ip_vs_get_out_rt_v6(struct ip_vs_conn *cp)
{
struct rt6_info *rt; /* Route to the other host */
struct ip_vs_dest *dest = cp->dest;
if (dest) {
spin_lock(&dest->dst_lock);
rt = (struct rt6_info *)__ip_vs_dst_check(dest, 0, 0);
if (!rt) {
struct flowi fl = {
.oif = 0,
.nl_u = {
.ip6_u = {
.daddr = dest->addr.in6,
.saddr = {
.s6_addr32 =
{ 0, 0, 0, 0 },
},
},
},
};
rt = (struct rt6_info *)ip6_route_output(&init_net,
NULL, &fl);
if (!rt) {
spin_unlock(&dest->dst_lock);
IP_VS_DBG_RL("ip6_route_output error, "
"dest: " NIP6_FMT "\n",
NIP6(dest->addr.in6));
return NULL;
}
__ip_vs_dst_set(dest, 0, dst_clone(&rt->u.dst));
IP_VS_DBG(10, "new dst " NIP6_FMT ", refcnt=%d\n",
NIP6(dest->addr.in6),
atomic_read(&rt->u.dst.__refcnt));
}
spin_unlock(&dest->dst_lock);
} else {
struct flowi fl = {
.oif = 0,
.nl_u = {
.ip6_u = {
.daddr = cp->daddr.in6,
.saddr = {
.s6_addr32 = { 0, 0, 0, 0 },
},
},
},
};
rt = (struct rt6_info *)ip6_route_output(&init_net, NULL, &fl);
if (!rt) {
IP_VS_DBG_RL("ip6_route_output error, dest: "
NIP6_FMT "\n", NIP6(cp->daddr.in6));
return NULL;
}
}
return rt;
}
#endif
/*
* Release dest->dst_cache before a dest is removed
@ -123,11 +191,11 @@ ip_vs_dst_reset(struct ip_vs_dest *dest)
dst_release(old_dst);
}
#define IP_VS_XMIT(skb, rt) \
#define IP_VS_XMIT(pf, skb, rt) \
do { \
(skb)->ipvs_property = 1; \
skb_forward_csum(skb); \
NF_HOOK(PF_INET, NF_INET_LOCAL_OUT, (skb), NULL, \
NF_HOOK(pf, NF_INET_LOCAL_OUT, (skb), NULL, \
(rt)->u.dst.dev, dst_output); \
} while (0)
@ -200,7 +268,7 @@ ip_vs_bypass_xmit(struct sk_buff *skb, struct ip_vs_conn *cp,
/* Another hack: avoid icmp_send in ip_fragment */
skb->local_df = 1;
IP_VS_XMIT(skb, rt);
IP_VS_XMIT(PF_INET, skb, rt);
LeaveFunction(10);
return NF_STOLEN;
@ -276,7 +344,7 @@ ip_vs_nat_xmit(struct sk_buff *skb, struct ip_vs_conn *cp,
/* Another hack: avoid icmp_send in ip_fragment */
skb->local_df = 1;
IP_VS_XMIT(skb, rt);
IP_VS_XMIT(PF_INET, skb, rt);
LeaveFunction(10);
return NF_STOLEN;
@ -467,7 +535,7 @@ ip_vs_dr_xmit(struct sk_buff *skb, struct ip_vs_conn *cp,
/* Another hack: avoid icmp_send in ip_fragment */
skb->local_df = 1;
IP_VS_XMIT(skb, rt);
IP_VS_XMIT(PF_INET, skb, rt);
LeaveFunction(10);
return NF_STOLEN;
@ -540,7 +608,7 @@ ip_vs_icmp_xmit(struct sk_buff *skb, struct ip_vs_conn *cp,
/* Another hack: avoid icmp_send in ip_fragment */
skb->local_df = 1;
IP_VS_XMIT(skb, rt);
IP_VS_XMIT(PF_INET, skb, rt);
rc = NF_STOLEN;
goto out;