IB/core: Introduce flow tag specification

This specification identifies flow with a specific tag-id.
This tag-id will be reported in the CQE.

Signed-off-by: Moses Reuben <mosesr@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>

include/rdma/ib_verbs.h

@@ -1604,6 +1604,8 @@ enum ib_flow_spec_type {
 	IB_FLOW_SPEC_UDP		= 0x41,
 	IB_FLOW_SPEC_VXLAN_TUNNEL	= 0x50,
 	IB_FLOW_SPEC_INNER		= 0x100,
+	/* Actions */
+	IB_FLOW_SPEC_ACTION_TAG         = 0x1000,
 };
 #define IB_FLOW_SPEC_LAYER_MASK	0xF0
 #define IB_FLOW_SPEC_SUPPORT_LAYERS 8
@@ -1726,6 +1728,12 @@ struct ib_flow_spec_tunnel {
 	struct ib_flow_tunnel_filter  mask;
 };
 
+struct ib_flow_spec_action_tag {
+	enum ib_flow_spec_type	      type;
+	u16			      size;
+	u32                           tag_id;
+};
+
 union ib_flow_spec {
 	struct {
 		u32			type;
@@ -1737,6 +1745,7 @@ union ib_flow_spec {
 	struct ib_flow_spec_tcp_udp	tcp_udp;
 	struct ib_flow_spec_ipv6        ipv6;
 	struct ib_flow_spec_tunnel      tunnel;
+	struct ib_flow_spec_action_tag  flow_tag;
 };
 
 struct ib_flow_attr {