fib_rules: add route suppression based on ifgroup

This change adds the ability to suppress a routing decision based upon the
interface group the selected interface belongs to. This allows it to
exclude specific devices from a routing decision.

Signed-off-by: Stefan Tomanek <stefan.tomanek@wertarbyte.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/uapi/linux/fib_rules.h b/include/uapi/linux/fib_rules.h
index 59cd31b..63e3116 100644
--- a/include/uapi/linux/fib_rules.h
+++ b/include/uapi/linux/fib_rules.h
@@ -44,7 +44,7 @@
 	FRA_FWMARK,	/* mark */
 	FRA_FLOW,	/* flow/class id */
 	FRA_UNUSED6,
-	FRA_UNUSED7,
+	FRA_SUPPRESS_IFGROUP,
 	FRA_TABLE_PREFIXLEN_MIN,
 	FRA_TABLE,	/* Extended table id */
 	FRA_FWMASK,	/* mask for netfilter mark */