From: David Ahern <dsa@cumulusnetworks.com>
Date: Thu, 20 Aug 2015 22:06:30 +0000 (-0700)
Subject: xfrm: Use VRF master index if output device is enslaved
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=4ec3b28c2763e11a423d03810ff0be65f02e635e;p=openwrt%2Fstaging%2Fblogic.git

xfrm: Use VRF master index if output device is enslaved

Directs route lookups to VRF table. Compiles out if NET_VRF is not
enabled. With this patch able to successfully bring up ipsec tunnels
in VRFs, even with duplicate network configuration.

Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Acked-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Acked-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/ipv4/xfrm4_policy.c b/net/ipv4/xfrm4_policy.c
index 55b3c0f4dde5..bb919b28619f 100644
--- a/net/ipv4/xfrm4_policy.c
+++ b/net/ipv4/xfrm4_policy.c
@@ -15,6 +15,7 @@
 #include <net/dst.h>
 #include <net/xfrm.h>
 #include <net/ip.h>
+#include <net/vrf.h>
 
 static struct xfrm_policy_afinfo xfrm4_policy_afinfo;
 
@@ -107,8 +108,10 @@ _decode_session4(struct sk_buff *skb, struct flowi *fl, int reverse)
 	struct flowi4 *fl4 = &fl->u.ip4;
 	int oif = 0;
 
-	if (skb_dst(skb))
-		oif = skb_dst(skb)->dev->ifindex;
+	if (skb_dst(skb)) {
+		oif = vrf_master_ifindex(skb_dst(skb)->dev) ?
+			: skb_dst(skb)->dev->ifindex;
+	}
 
 	memset(fl4, 0, sizeof(struct flowi4));
 	fl4->flowi4_mark = skb->mark;
diff --git a/net/ipv6/xfrm6_policy.c b/net/ipv6/xfrm6_policy.c
index a74013d3eceb..30caa289c5db 100644
--- a/net/ipv6/xfrm6_policy.c
+++ b/net/ipv6/xfrm6_policy.c
@@ -20,6 +20,7 @@
 #include <net/ip.h>
 #include <net/ipv6.h>
 #include <net/ip6_route.h>
+#include <net/vrf.h>
 #if IS_ENABLED(CONFIG_IPV6_MIP6)
 #include <net/mip6.h>
 #endif
@@ -131,8 +132,10 @@ _decode_session6(struct sk_buff *skb, struct flowi *fl, int reverse)
 
 	nexthdr = nh[nhoff];
 
-	if (skb_dst(skb))
-		oif = skb_dst(skb)->dev->ifindex;
+	if (skb_dst(skb)) {
+		oif = vrf_master_ifindex(skb_dst(skb)->dev) ?
+			: skb_dst(skb)->dev->ifindex;
+	}
 
 	memset(fl6, 0, sizeof(struct flowi6));
 	fl6->flowi6_mark = skb->mark;