+enum user_action_cookie_type {
+ USER_ACTION_COOKIE_UNSPEC,
+ USER_ACTION_COOKIE_SFLOW, /* Packet for per-bridge sFlow sampling. */
+ USER_ACTION_COOKIE_SLOW_PATH, /* Userspace must process this flow. */
+ USER_ACTION_COOKIE_FLOW_SAMPLE, /* Packet for per-flow sampling. */
+ USER_ACTION_COOKIE_IPFIX, /* Packet for per-bridge IPFIX sampling. */
+};
+
+/* user_action_cookie is passed as argument to OVS_ACTION_ATTR_USERSPACE.
+ * Since it is passed to kernel as u64, its size has to be 8 bytes. */
+union user_action_cookie {
+ uint16_t type; /* enum user_action_cookie_type. */
+
+ struct {
+ uint16_t type; /* USER_ACTION_COOKIE_SFLOW. */
+ ovs_be16 vlan_tci; /* Destination VLAN TCI. */
+ uint32_t output; /* SFL_FLOW_SAMPLE_TYPE 'output' value. */
+ } sflow;
+
+ struct {
+ uint16_t type; /* USER_ACTION_COOKIE_SLOW_PATH. */
+ uint16_t unused;
+ uint32_t reason; /* enum slow_path_reason. */
+ } slow_path;
+
+ struct {
+ uint16_t type; /* USER_ACTION_COOKIE_FLOW_SAMPLE. */
+ uint16_t probability; /* Sampling probability. */
+ uint32_t collector_set_id; /* ID of IPFIX collector set. */
+ uint32_t obs_domain_id; /* Observation Domain ID. */
+ uint32_t obs_point_id; /* Observation Point ID. */
+ } flow_sample;
+
+ struct {
+ uint16_t type; /* USER_ACTION_COOKIE_IPFIX. */
+ } ipfix;
+};
+BUILD_ASSERT_DECL(sizeof(union user_action_cookie) == 16);
+
+size_t odp_put_userspace_action(uint32_t pid,
+ const void *userdata, size_t userdata_size,
+ struct ofpbuf *odp_actions);
+void odp_put_tunnel_action(const struct flow_tnl *tunnel,
+ struct ofpbuf *odp_actions);
+void odp_put_skb_mark_action(const uint32_t skb_mark,
+ struct ofpbuf *odp_actions);
+
+/* Reasons why a subfacet might not be fast-pathable. */
+enum slow_path_reason {
+ /* These reasons are mutually exclusive. */
+ SLOW_CFM = 1 << 0, /* CFM packets need per-packet processing. */
+ SLOW_LACP = 1 << 1, /* LACP packets need per-packet processing. */
+ SLOW_STP = 1 << 2, /* STP packets need per-packet processing. */
+ SLOW_IN_BAND = 1 << 3, /* In-band control needs every packet. */
+ SLOW_BFD = 1 << 4, /* BFD packets need per-packet processing. */
+
+ /* Mutually exclusive with SLOW_BFD, SLOW_CFM, SLOW_LACP, SLOW_STP.
+ * Could possibly appear with SLOW_IN_BAND. */
+ SLOW_CONTROLLER = 1 << 5, /* Packets must go to OpenFlow controller. */
+
+ /* This can appear on its own, or, theoretically at least, along with any
+ * other combination of reasons. */
+ SLOW_MATCH = 1 << 6, /* Datapath can't match specifically enough. */
+};