net: Add flowiX_to_flowi() shorthands.

This is just a shorthand which will help in passing around AF
specific flow structures as generic ones.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 15 insertions, 0 deletions

diff --git a/include/net/flow.h b/include/net/flow.h
index 931169095cc..8139257ee11 100644
--- a/include/net/flow.h
+++ b/include/net/flow.h
@@ -112,6 +112,21 @@ struct flowi {
 #define fl6_gre_key     u.ip6.uli.gre_key
 } __attribute__((__aligned__(BITS_PER_LONG/8)));
 
+static inline struct flowi *flowi4_to_flowi(struct flowi4 *fl4)
+{
+        return container_of(fl4, struct flowi, u.ip4);
+}
+
+static inline struct flowi *flowi6_to_flowi(struct flowi6 *fl6)
+{
+        return container_of(fl6, struct flowi, u.ip6);
+}
+
+static inline struct flowi *flowidn_to_flowi(struct flowidn *fldn)
+{
+        return container_of(fldn, struct flowi, u.dn);
+}
+
 #define FLOW_DIR_IN     0
 #define FLOW_DIR_OUT    1
 #define FLOW_DIR_FWD    2