From: Julian Anastasov Date: Mon, 8 Oct 2012 11:41:20 +0000 (+0000) Subject: ipvs: fix ARP resolving for direct routing mode X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=ad4d3ef8b7eb527cca478dc08c02c10936e64115;p=openwrt%2Fstaging%2Fblogic.git ipvs: fix ARP resolving for direct routing mode After the change "Make neigh lookups directly in output packet path" (commit a263b30936) IPVS can not reach the real server for DR mode because we resolve the destination address from IP header, not from route neighbour. Use the new FLOWI_FLAG_KNOWN_NH flag to request output routes with known nexthop, so that it has preference on resolving. Signed-off-by: Julian Anastasov Signed-off-by: David S. Miller --- diff --git a/net/netfilter/ipvs/ip_vs_xmit.c b/net/netfilter/ipvs/ip_vs_xmit.c index 56f6d5d81a77..cc4c8095681a 100644 --- a/net/netfilter/ipvs/ip_vs_xmit.c +++ b/net/netfilter/ipvs/ip_vs_xmit.c @@ -50,6 +50,7 @@ enum { * local */ IP_VS_RT_MODE_CONNECT = 8, /* Always bind route to saddr */ + IP_VS_RT_MODE_KNOWN_NH = 16,/* Route via remote addr */ }; /* @@ -113,6 +114,8 @@ static struct rtable *do_output_route4(struct net *net, __be32 daddr, fl4.daddr = daddr; fl4.saddr = (rt_mode & IP_VS_RT_MODE_CONNECT) ? *saddr : 0; fl4.flowi4_tos = rtos; + fl4.flowi4_flags = (rt_mode & IP_VS_RT_MODE_KNOWN_NH) ? + FLOWI_FLAG_KNOWN_NH : 0; retry: rt = ip_route_output_key(net, &fl4); @@ -1061,7 +1064,8 @@ ip_vs_dr_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, if (!(rt = __ip_vs_get_out_rt(skb, cp->dest, cp->daddr.ip, RT_TOS(iph->tos), IP_VS_RT_MODE_LOCAL | - IP_VS_RT_MODE_NON_LOCAL, NULL))) + IP_VS_RT_MODE_NON_LOCAL | + IP_VS_RT_MODE_KNOWN_NH, NULL))) goto tx_error_icmp; if (rt->rt_flags & RTCF_LOCAL) { ip_rt_put(rt);