net/sched: act_mirred: Add helper inlines to access tcf_mirred info.

The helper function is_tcf_mirred_mirror helps finding whether an action
struct is of type mirred and is configured to be of type mirror.
Signed-off-by: NYotam Gigi <yotamg@mellanox.com>
Signed-off-by: NJiri Pirko <jiri@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

include/net/tc_act/tc_mirred.h

@@ -24,6 +24,15 @@ static inline bool is_tcf_mirred_redirect(const struct tc_action *a)
 	return false;
 }
 
+static inline bool is_tcf_mirred_mirror(const struct tc_action *a)
+{
+#ifdef CONFIG_NET_CLS_ACT
+	if (a->ops && a->ops->type == TCA_ACT_MIRRED)
+		return to_mirred(a)->tcfm_eaction == TCA_EGRESS_MIRROR;
+#endif
+	return false;
+}
+
 static inline int tcf_mirred_ifindex(const struct tc_action *a)
 {
 	return to_mirred(a)->tcfm_ifindex;