net: Fix RPF to work with policy routing

Policy routing is not looked up by mark on reverse path filtering.
This fixes it.

Signed-off-by: Jamal Hadi Salim <hadi@cyberus.ca>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index bb41992..5b1050a 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -1854,7 +1854,7 @@
 			goto e_inval;
 		spec_dst = inet_select_addr(dev, 0, RT_SCOPE_LINK);
 	} else if (fib_validate_source(saddr, 0, tos, 0,
-					dev, &spec_dst, &itag) < 0)
+					dev, &spec_dst, &itag, 0) < 0)
 		goto e_inval;
 
 	rth = dst_alloc(&ipv4_dst_ops);
@@ -1967,7 +1967,7 @@
 
 
 	err = fib_validate_source(saddr, daddr, tos, FIB_RES_OIF(*res),
-				  in_dev->dev, &spec_dst, &itag);
+				  in_dev->dev, &spec_dst, &itag, skb->mark);
 	if (err < 0) {
 		ip_handle_martian_source(in_dev->dev, in_dev, skb, daddr,
 					 saddr);
@@ -2141,7 +2141,7 @@
 		int result;
 		result = fib_validate_source(saddr, daddr, tos,
 					     net->loopback_dev->ifindex,
-					     dev, &spec_dst, &itag);
+					     dev, &spec_dst, &itag, skb->mark);
 		if (result < 0)
 			goto martian_source;
 		if (result)
@@ -2170,7 +2170,7 @@
 		spec_dst = inet_select_addr(dev, 0, RT_SCOPE_LINK);
 	else {
 		err = fib_validate_source(saddr, 0, tos, 0, dev, &spec_dst,
-					  &itag);
+					  &itag, skb->mark);
 		if (err < 0)
 			goto martian_source;
 		if (err)