ipvs: try also real server with port 0 in backup server

	We should not forget to try for real server with port 0
in the backup server when processing the sync message. We should
do it in all cases because the backup server can use different
forwarding method.

Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

4 files changed, 11 insertions, 5 deletions

diff --git a/include/net/ip_vs.h b/include/net/ip_vs.h
index 873d5be7926c..e5a7b9aaf552 100644
--- a/include/net/ip_vs.h
+++ b/include/net/ip_vs.h
@@ -1207,7 +1207,7 @@ extern void ip_vs_control_cleanup(void);
 extern struct ip_vs_dest *
 ip_vs_find_dest(struct net *net, int af, const union nf_inet_addr *daddr,
                 __be16 dport, const union nf_inet_addr *vaddr, __be16 vport,
-                __u16 protocol, __u32 fwmark);
+                __u16 protocol, __u32 fwmark, __u32 flags);
 extern struct ip_vs_dest *ip_vs_try_bind_dest(struct ip_vs_conn *cp);
 
 
diff --git a/net/netfilter/ipvs/ip_vs_conn.c b/net/netfilter/ipvs/ip_vs_conn.c
index 12571fb2881c..29fa5badde75 100644
--- a/net/netfilter/ipvs/ip_vs_conn.c
+++ b/net/netfilter/ipvs/ip_vs_conn.c
@@ -616,7 +616,7 @@ struct ip_vs_dest *ip_vs_try_bind_dest(struct ip_vs_conn *cp)
         if ((cp) && (!cp->dest)) {
                 dest = ip_vs_find_dest(ip_vs_conn_net(cp), cp->af, &cp->daddr,
                                        cp->dport, &cp->vaddr, cp->vport,
-                                       cp->protocol, cp->fwmark);
+                                       cp->protocol, cp->fwmark, cp->flags);
                 ip_vs_bind_dest(cp, dest);
                 return dest;
         } else
diff --git a/net/netfilter/ipvs/ip_vs_ctl.c b/net/netfilter/ipvs/ip_vs_ctl.c
index 008bf97cc91a..e1a66cf37f9a 100644
--- a/net/netfilter/ipvs/ip_vs_ctl.c
+++ b/net/netfilter/ipvs/ip_vs_ctl.c
@@ -619,15 +619,21 @@ struct ip_vs_dest *ip_vs_find_dest(struct net  *net, int af,
                                    const union nf_inet_addr *daddr,
                                    __be16 dport,
                                    const union nf_inet_addr *vaddr,
-                                   __be16 vport, __u16 protocol, __u32 fwmark)
+                                   __be16 vport, __u16 protocol, __u32 fwmark,
+                                   __u32 flags)
 {
         struct ip_vs_dest *dest;
         struct ip_vs_service *svc;
+        __be16 port = dport;
 
         svc = ip_vs_service_get(net, af, fwmark, protocol, vaddr, vport);
         if (!svc)
                 return NULL;
-        dest = ip_vs_lookup_dest(svc, daddr, dport);
+        if (fwmark && (flags & IP_VS_CONN_F_FWD_MASK) != IP_VS_CONN_F_MASQ)
+                port = 0;
+        dest = ip_vs_lookup_dest(svc, daddr, port);
+        if (!dest)
+                dest = ip_vs_lookup_dest(svc, daddr, port ^ dport);
         if (dest)
                 atomic_inc(&dest->refcnt);
         ip_vs_service_put(svc);
diff --git a/net/netfilter/ipvs/ip_vs_sync.c b/net/netfilter/ipvs/ip_vs_sync.c
index 3cdd479f9b5d..2b6678c0ce14 100644
--- a/net/netfilter/ipvs/ip_vs_sync.c
+++ b/net/netfilter/ipvs/ip_vs_sync.c
@@ -740,7 +740,7 @@ static void ip_vs_proc_conn(struct net *net, struct ip_vs_conn_param *param,
                  * but still handled.
                  */
                 dest = ip_vs_find_dest(net, type, daddr, dport, param->vaddr,
-                                       param->vport, protocol, fwmark);
+                                       param->vport, protocol, fwmark, flags);
 
                 /*  Set the approprite ativity flag */
                 if (protocol == IPPROTO_TCP) {