ipv4: Pass ipv4 flow objects into fib_lookup() paths.

To start doing these conversions, we need to add some temporary
flow4_* macros which will eventually go away when all the protocol
code paths are changed to work on AF specific flowi objects.

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/flow.h b/include/net/flow.h
index 8139257e..3e4630e 100644
--- a/include/net/flow.h
+++ b/include/net/flow.h
@@ -50,6 +50,14 @@
 
 struct flowi4 {
 	struct flowi_common	__fl_common;
+#define flowi4_oif		__fl_common.flowic_oif
+#define flowi4_iif		__fl_common.flowic_iif
+#define flowi4_mark		__fl_common.flowic_mark
+#define flowi4_tos		__fl_common.flowic_tos
+#define flowi4_scope		__fl_common.flowic_scope
+#define flowi4_proto		__fl_common.flowic_proto
+#define flowi4_flags		__fl_common.flowic_flags
+#define flowi4_secid		__fl_common.flowic_secid
 	__be32			daddr;
 	__be32			saddr;
 	union flowi_uli		uli;