net: sched: Add helpers to identify classids

Offloading drivers need to understand what qdisc class a filter is added
to. Currently they only need to identify ingress, clsact->ingress and
clsact->egress. So provide these helpers.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/pkt_sched.h

@@ -5,6 +5,7 @@
 #include <linux/ktime.h>
 #include <linux/if_vlan.h>
 #include <net/sch_generic.h>
+#include <uapi/linux/pkt_sched.h>
 
 #define DEFAULT_TX_QUEUE_LEN	1000
 
@@ -132,4 +133,17 @@ static inline unsigned int psched_mtu(const struct net_device *dev)
 	return dev->mtu + dev->hard_header_len;
 }
 
+static inline bool is_classid_clsact_ingress(u32 classid)
+{
+	/* This also returns true for ingress qdisc */
+	return TC_H_MAJ(classid) == TC_H_MAJ(TC_H_CLSACT) &&
+	       TC_H_MIN(classid) != TC_H_MIN(TC_H_MIN_EGRESS);
+}
+
+static inline bool is_classid_clsact_egress(u32 classid)
+{
+	return TC_H_MAJ(classid) == TC_H_MAJ(TC_H_CLSACT) &&
+	       TC_H_MIN(classid) == TC_H_MIN(TC_H_MIN_EGRESS);
+}
+
 #endif