Adding upstream version 16.2.11+ds.upstream/16.2.11+dsupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1252 insertions, 0 deletions

diff --git a/src/spdk/dpdk/lib/librte_ethdev/rte_flow.c b/src/spdk/dpdk/lib/librte_ethdev/rte_flow.c
new file mode 100644
index 000000000..1685be5f7
--- /dev/null
+++ b/src/spdk/dpdk/lib/librte_ethdev/rte_flow.c
@@ -0,0 +1,1252 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright 2016 6WIND S.A.
+ * Copyright 2016 Mellanox Technologies, Ltd
+ */
+
+#include <errno.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <string.h>
+
+#include <rte_common.h>
+#include <rte_errno.h>
+#include <rte_branch_prediction.h>
+#include <rte_string_fns.h>
+#include <rte_mbuf.h>
+#include <rte_mbuf_dyn.h>
+#include "rte_ethdev.h"
+#include "rte_flow_driver.h"
+#include "rte_flow.h"
+
+/* Mbuf dynamic field name for metadata. */
+int32_t rte_flow_dynf_metadata_offs = -1;
+
+/* Mbuf dynamic field flag bit number for metadata. */
+uint64_t rte_flow_dynf_metadata_mask;
+
+/**
+ * Flow elements description tables.
+ */
+struct rte_flow_desc_data {
+	const char *name;
+	size_t size;
+};
+
+/** Generate flow_item[] entry. */
+#define MK_FLOW_ITEM(t, s) \
+	[RTE_FLOW_ITEM_TYPE_ ## t] = { \
+		.name = # t, \
+		.size = s, \
+	}
+
+/** Information about known flow pattern items. */
+static const struct rte_flow_desc_data rte_flow_desc_item[] = {
+	MK_FLOW_ITEM(END, 0),
+	MK_FLOW_ITEM(VOID, 0),
+	MK_FLOW_ITEM(INVERT, 0),
+	MK_FLOW_ITEM(ANY, sizeof(struct rte_flow_item_any)),
+	MK_FLOW_ITEM(PF, 0),
+	MK_FLOW_ITEM(VF, sizeof(struct rte_flow_item_vf)),
+	MK_FLOW_ITEM(PHY_PORT, sizeof(struct rte_flow_item_phy_port)),
+	MK_FLOW_ITEM(PORT_ID, sizeof(struct rte_flow_item_port_id)),
+	MK_FLOW_ITEM(RAW, sizeof(struct rte_flow_item_raw)),
+	MK_FLOW_ITEM(ETH, sizeof(struct rte_flow_item_eth)),
+	MK_FLOW_ITEM(VLAN, sizeof(struct rte_flow_item_vlan)),
+	MK_FLOW_ITEM(IPV4, sizeof(struct rte_flow_item_ipv4)),
+	MK_FLOW_ITEM(IPV6, sizeof(struct rte_flow_item_ipv6)),
+	MK_FLOW_ITEM(ICMP, sizeof(struct rte_flow_item_icmp)),
+	MK_FLOW_ITEM(UDP, sizeof(struct rte_flow_item_udp)),
+	MK_FLOW_ITEM(TCP, sizeof(struct rte_flow_item_tcp)),
+	MK_FLOW_ITEM(SCTP, sizeof(struct rte_flow_item_sctp)),
+	MK_FLOW_ITEM(VXLAN, sizeof(struct rte_flow_item_vxlan)),
+	MK_FLOW_ITEM(E_TAG, sizeof(struct rte_flow_item_e_tag)),
+	MK_FLOW_ITEM(NVGRE, sizeof(struct rte_flow_item_nvgre)),
+	MK_FLOW_ITEM(MPLS, sizeof(struct rte_flow_item_mpls)),
+	MK_FLOW_ITEM(GRE, sizeof(struct rte_flow_item_gre)),
+	MK_FLOW_ITEM(FUZZY, sizeof(struct rte_flow_item_fuzzy)),
+	MK_FLOW_ITEM(GTP, sizeof(struct rte_flow_item_gtp)),
+	MK_FLOW_ITEM(GTPC, sizeof(struct rte_flow_item_gtp)),
+	MK_FLOW_ITEM(GTPU, sizeof(struct rte_flow_item_gtp)),
+	MK_FLOW_ITEM(ESP, sizeof(struct rte_flow_item_esp)),
+	MK_FLOW_ITEM(GENEVE, sizeof(struct rte_flow_item_geneve)),
+	MK_FLOW_ITEM(VXLAN_GPE, sizeof(struct rte_flow_item_vxlan_gpe)),
+	MK_FLOW_ITEM(ARP_ETH_IPV4, sizeof(struct rte_flow_item_arp_eth_ipv4)),
+	MK_FLOW_ITEM(IPV6_EXT, sizeof(struct rte_flow_item_ipv6_ext)),
+	MK_FLOW_ITEM(ICMP6, sizeof(struct rte_flow_item_icmp6)),
+	MK_FLOW_ITEM(ICMP6_ND_NS, sizeof(struct rte_flow_item_icmp6_nd_ns)),
+	MK_FLOW_ITEM(ICMP6_ND_NA, sizeof(struct rte_flow_item_icmp6_nd_na)),
+	MK_FLOW_ITEM(ICMP6_ND_OPT, sizeof(struct rte_flow_item_icmp6_nd_opt)),
+	MK_FLOW_ITEM(ICMP6_ND_OPT_SLA_ETH,
+		     sizeof(struct rte_flow_item_icmp6_nd_opt_sla_eth)),
+	MK_FLOW_ITEM(ICMP6_ND_OPT_TLA_ETH,
+		     sizeof(struct rte_flow_item_icmp6_nd_opt_tla_eth)),
+	MK_FLOW_ITEM(MARK, sizeof(struct rte_flow_item_mark)),
+	MK_FLOW_ITEM(META, sizeof(struct rte_flow_item_meta)),
+	MK_FLOW_ITEM(TAG, sizeof(struct rte_flow_item_tag)),
+	MK_FLOW_ITEM(GRE_KEY, sizeof(rte_be32_t)),
+	MK_FLOW_ITEM(GTP_PSC, sizeof(struct rte_flow_item_gtp_psc)),
+	MK_FLOW_ITEM(PPPOES, sizeof(struct rte_flow_item_pppoe)),
+	MK_FLOW_ITEM(PPPOED, sizeof(struct rte_flow_item_pppoe)),
+	MK_FLOW_ITEM(PPPOE_PROTO_ID,
+			sizeof(struct rte_flow_item_pppoe_proto_id)),
+	MK_FLOW_ITEM(NSH, sizeof(struct rte_flow_item_nsh)),
+	MK_FLOW_ITEM(IGMP, sizeof(struct rte_flow_item_igmp)),
+	MK_FLOW_ITEM(AH, sizeof(struct rte_flow_item_ah)),
+	MK_FLOW_ITEM(HIGIG2, sizeof(struct rte_flow_item_higig2_hdr)),
+	MK_FLOW_ITEM(L2TPV3OIP, sizeof(struct rte_flow_item_l2tpv3oip)),
+	MK_FLOW_ITEM(PFCP, sizeof(struct rte_flow_item_pfcp)),
+};
+
+/** Generate flow_action[] entry. */
+#define MK_FLOW_ACTION(t, s) \
+	[RTE_FLOW_ACTION_TYPE_ ## t] = { \
+		.name = # t, \
+		.size = s, \
+	}
+
+/** Information about known flow actions. */
+static const struct rte_flow_desc_data rte_flow_desc_action[] = {
+	MK_FLOW_ACTION(END, 0),
+	MK_FLOW_ACTION(VOID, 0),
+	MK_FLOW_ACTION(PASSTHRU, 0),
+	MK_FLOW_ACTION(JUMP, sizeof(struct rte_flow_action_jump)),
+	MK_FLOW_ACTION(MARK, sizeof(struct rte_flow_action_mark)),
+	MK_FLOW_ACTION(FLAG, 0),
+	MK_FLOW_ACTION(QUEUE, sizeof(struct rte_flow_action_queue)),
+	MK_FLOW_ACTION(DROP, 0),
+	MK_FLOW_ACTION(COUNT, sizeof(struct rte_flow_action_count)),
+	MK_FLOW_ACTION(RSS, sizeof(struct rte_flow_action_rss)),
+	MK_FLOW_ACTION(PF, 0),
+	MK_FLOW_ACTION(VF, sizeof(struct rte_flow_action_vf)),
+	MK_FLOW_ACTION(PHY_PORT, sizeof(struct rte_flow_action_phy_port)),
+	MK_FLOW_ACTION(PORT_ID, sizeof(struct rte_flow_action_port_id)),
+	MK_FLOW_ACTION(METER, sizeof(struct rte_flow_action_meter)),
+	MK_FLOW_ACTION(SECURITY, sizeof(struct rte_flow_action_security)),
+	MK_FLOW_ACTION(OF_SET_MPLS_TTL,
+		       sizeof(struct rte_flow_action_of_set_mpls_ttl)),
+	MK_FLOW_ACTION(OF_DEC_MPLS_TTL, 0),
+	MK_FLOW_ACTION(OF_SET_NW_TTL,
+		       sizeof(struct rte_flow_action_of_set_nw_ttl)),
+	MK_FLOW_ACTION(OF_DEC_NW_TTL, 0),
+	MK_FLOW_ACTION(OF_COPY_TTL_OUT, 0),
+	MK_FLOW_ACTION(OF_COPY_TTL_IN, 0),
+	MK_FLOW_ACTION(OF_POP_VLAN, 0),
+	MK_FLOW_ACTION(OF_PUSH_VLAN,
+		       sizeof(struct rte_flow_action_of_push_vlan)),
+	MK_FLOW_ACTION(OF_SET_VLAN_VID,
+		       sizeof(struct rte_flow_action_of_set_vlan_vid)),
+	MK_FLOW_ACTION(OF_SET_VLAN_PCP,
+		       sizeof(struct rte_flow_action_of_set_vlan_pcp)),
+	MK_FLOW_ACTION(OF_POP_MPLS,
+		       sizeof(struct rte_flow_action_of_pop_mpls)),
+	MK_FLOW_ACTION(OF_PUSH_MPLS,
+		       sizeof(struct rte_flow_action_of_push_mpls)),
+	MK_FLOW_ACTION(VXLAN_ENCAP, sizeof(struct rte_flow_action_vxlan_encap)),
+	MK_FLOW_ACTION(VXLAN_DECAP, 0),
+	MK_FLOW_ACTION(NVGRE_ENCAP, sizeof(struct rte_flow_action_vxlan_encap)),
+	MK_FLOW_ACTION(NVGRE_DECAP, 0),
+	MK_FLOW_ACTION(RAW_ENCAP, sizeof(struct rte_flow_action_raw_encap)),
+	MK_FLOW_ACTION(RAW_DECAP, sizeof(struct rte_flow_action_raw_decap)),
+	MK_FLOW_ACTION(SET_IPV4_SRC,
+		       sizeof(struct rte_flow_action_set_ipv4)),
+	MK_FLOW_ACTION(SET_IPV4_DST,
+		       sizeof(struct rte_flow_action_set_ipv4)),
+	MK_FLOW_ACTION(SET_IPV6_SRC,
+		       sizeof(struct rte_flow_action_set_ipv6)),
+	MK_FLOW_ACTION(SET_IPV6_DST,
+		       sizeof(struct rte_flow_action_set_ipv6)),
+	MK_FLOW_ACTION(SET_TP_SRC,
+		       sizeof(struct rte_flow_action_set_tp)),
+	MK_FLOW_ACTION(SET_TP_DST,
+		       sizeof(struct rte_flow_action_set_tp)),
+	MK_FLOW_ACTION(MAC_SWAP, 0),
+	MK_FLOW_ACTION(DEC_TTL, 0),
+	MK_FLOW_ACTION(SET_TTL, sizeof(struct rte_flow_action_set_ttl)),
+	MK_FLOW_ACTION(SET_MAC_SRC, sizeof(struct rte_flow_action_set_mac)),
+	MK_FLOW_ACTION(SET_MAC_DST, sizeof(struct rte_flow_action_set_mac)),
+	MK_FLOW_ACTION(INC_TCP_SEQ, sizeof(rte_be32_t)),
+	MK_FLOW_ACTION(DEC_TCP_SEQ, sizeof(rte_be32_t)),
+	MK_FLOW_ACTION(INC_TCP_ACK, sizeof(rte_be32_t)),
+	MK_FLOW_ACTION(DEC_TCP_ACK, sizeof(rte_be32_t)),
+	MK_FLOW_ACTION(SET_TAG, sizeof(struct rte_flow_action_set_tag)),
+	MK_FLOW_ACTION(SET_META, sizeof(struct rte_flow_action_set_meta)),
+	MK_FLOW_ACTION(SET_IPV4_DSCP, sizeof(struct rte_flow_action_set_dscp)),
+	MK_FLOW_ACTION(SET_IPV6_DSCP, sizeof(struct rte_flow_action_set_dscp)),
+	MK_FLOW_ACTION(AGE, sizeof(struct rte_flow_action_age)),
+};
+
+int
+rte_flow_dynf_metadata_register(void)
+{
+	int offset;
+	int flag;
+
+	static const struct rte_mbuf_dynfield desc_offs = {
+		.name = RTE_MBUF_DYNFIELD_METADATA_NAME,
+		.size = sizeof(uint32_t),
+		.align = __alignof__(uint32_t),
+	};
+	static const struct rte_mbuf_dynflag desc_flag = {
+		.name = RTE_MBUF_DYNFLAG_METADATA_NAME,
+	};
+
+	offset = rte_mbuf_dynfield_register(&desc_offs);
+	if (offset < 0)
+		goto error;
+	flag = rte_mbuf_dynflag_register(&desc_flag);
+	if (flag < 0)
+		goto error;
+	rte_flow_dynf_metadata_offs = offset;
+	rte_flow_dynf_metadata_mask = (1ULL << flag);
+	return 0;
+
+error:
+	rte_flow_dynf_metadata_offs = -1;
+	rte_flow_dynf_metadata_mask = 0ULL;
+	return -rte_errno;
+}
+
+static int
+flow_err(uint16_t port_id, int ret, struct rte_flow_error *error)
+{
+	if (ret == 0)
+		return 0;
+	if (rte_eth_dev_is_removed(port_id))
+		return rte_flow_error_set(error, EIO,
+					  RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
+					  NULL, rte_strerror(EIO));
+	return ret;
+}
+
+static enum rte_flow_item_type
+rte_flow_expand_rss_item_complete(const struct rte_flow_item *item)
+{
+	enum rte_flow_item_type ret = RTE_FLOW_ITEM_TYPE_VOID;
+	uint16_t ether_type = 0;
+	uint16_t ether_type_m;
+	uint8_t ip_next_proto = 0;
+	uint8_t ip_next_proto_m;
+
+	if (item == NULL || item->spec == NULL)
+		return ret;
+	switch (item->type) {
+	case RTE_FLOW_ITEM_TYPE_ETH:
+		if (item->mask)
+			ether_type_m = ((const struct rte_flow_item_eth *)
+						(item->mask))->type;
+		else
+			ether_type_m = rte_flow_item_eth_mask.type;
+		if (ether_type_m != RTE_BE16(0xFFFF))
+			break;
+		ether_type = ((const struct rte_flow_item_eth *)
+				(item->spec))->type;
+		if (rte_be_to_cpu_16(ether_type) == RTE_ETHER_TYPE_IPV4)
+			ret = RTE_FLOW_ITEM_TYPE_IPV4;
+		else if (rte_be_to_cpu_16(ether_type) == RTE_ETHER_TYPE_IPV6)
+			ret = RTE_FLOW_ITEM_TYPE_IPV6;
+		else if (rte_be_to_cpu_16(ether_type) == RTE_ETHER_TYPE_VLAN)
+			ret = RTE_FLOW_ITEM_TYPE_VLAN;
+		break;
+	case RTE_FLOW_ITEM_TYPE_VLAN:
+		if (item->mask)
+			ether_type_m = ((const struct rte_flow_item_vlan *)
+						(item->mask))->inner_type;
+		else
+			ether_type_m = rte_flow_item_vlan_mask.inner_type;
+		if (ether_type_m != RTE_BE16(0xFFFF))
+			break;
+		ether_type = ((const struct rte_flow_item_vlan *)
+				(item->spec))->inner_type;
+		if (rte_be_to_cpu_16(ether_type) == RTE_ETHER_TYPE_IPV4)
+			ret = RTE_FLOW_ITEM_TYPE_IPV4;
+		else if (rte_be_to_cpu_16(ether_type) == RTE_ETHER_TYPE_IPV6)
+			ret = RTE_FLOW_ITEM_TYPE_IPV6;
+		else if (rte_be_to_cpu_16(ether_type) == RTE_ETHER_TYPE_VLAN)
+			ret = RTE_FLOW_ITEM_TYPE_VLAN;
+		break;
+	case RTE_FLOW_ITEM_TYPE_IPV4:
+		if (item->mask)
+			ip_next_proto_m = ((const struct rte_flow_item_ipv4 *)
+					(item->mask))->hdr.next_proto_id;
+		else
+			ip_next_proto_m =
+				rte_flow_item_ipv4_mask.hdr.next_proto_id;
+		if (ip_next_proto_m != 0xFF)
+			break;
+		ip_next_proto = ((const struct rte_flow_item_ipv4 *)
+				(item->spec))->hdr.next_proto_id;
+		if (ip_next_proto == IPPROTO_UDP)
+			ret = RTE_FLOW_ITEM_TYPE_UDP;
+		else if (ip_next_proto == IPPROTO_TCP)
+			ret = RTE_FLOW_ITEM_TYPE_TCP;
+		else if (ip_next_proto == IPPROTO_IP)
+			ret = RTE_FLOW_ITEM_TYPE_IPV4;
+		else if (ip_next_proto == IPPROTO_IPV6)
+			ret = RTE_FLOW_ITEM_TYPE_IPV6;
+		break;
+	case RTE_FLOW_ITEM_TYPE_IPV6:
+		if (item->mask)
+			ip_next_proto_m = ((const struct rte_flow_item_ipv6 *)
+						(item->mask))->hdr.proto;
+		else
+			ip_next_proto_m =
+				rte_flow_item_ipv6_mask.hdr.proto;
+		if (ip_next_proto_m != 0xFF)
+			break;
+		ip_next_proto = ((const struct rte_flow_item_ipv6 *)
+				(item->spec))->hdr.proto;
+		if (ip_next_proto == IPPROTO_UDP)
+			ret = RTE_FLOW_ITEM_TYPE_UDP;
+		else if (ip_next_proto == IPPROTO_TCP)
+			ret = RTE_FLOW_ITEM_TYPE_TCP;
+		else if (ip_next_proto == IPPROTO_IP)
+			ret = RTE_FLOW_ITEM_TYPE_IPV4;
+		else if (ip_next_proto == IPPROTO_IPV6)
+			ret = RTE_FLOW_ITEM_TYPE_IPV6;
+		break;
+	default:
+		ret = RTE_FLOW_ITEM_TYPE_VOID;
+		break;
+	}
+	return ret;
+}
+
+/* Get generic flow operations structure from a port. */
+const struct rte_flow_ops *
+rte_flow_ops_get(uint16_t port_id, struct rte_flow_error *error)
+{
+	struct rte_eth_dev *dev = &rte_eth_devices[port_id];
+	const struct rte_flow_ops *ops;
+	int code;
+
+	if (unlikely(!rte_eth_dev_is_valid_port(port_id)))
+		code = ENODEV;
+	else if (unlikely(!dev->dev_ops->filter_ctrl ||
+			  dev->dev_ops->filter_ctrl(dev,
+						    RTE_ETH_FILTER_GENERIC,
+						    RTE_ETH_FILTER_GET,
+						    &ops) ||
+			  !ops))
+		code = ENOSYS;
+	else
+		return ops;
+	rte_flow_error_set(error, code, RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
+			   NULL, rte_strerror(code));
+	return NULL;
+}
+
+/* Check whether a flow rule can be created on a given port. */
+int
+rte_flow_validate(uint16_t port_id,
+		  const struct rte_flow_attr *attr,
+		  const struct rte_flow_item pattern[],
+		  const struct rte_flow_action actions[],
+		  struct rte_flow_error *error)
+{
+	const struct rte_flow_ops *ops = rte_flow_ops_get(port_id, error);
+	struct rte_eth_dev *dev = &rte_eth_devices[port_id];
+
+	if (unlikely(!ops))
+		return -rte_errno;
+	if (likely(!!ops->validate))
+		return flow_err(port_id, ops->validate(dev, attr, pattern,
+						       actions, error), error);
+	return rte_flow_error_set(error, ENOSYS,
+				  RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
+				  NULL, rte_strerror(ENOSYS));
+}
+
+/* Create a flow rule on a given port. */
+struct rte_flow *
+rte_flow_create(uint16_t port_id,
+		const struct rte_flow_attr *attr,
+		const struct rte_flow_item pattern[],
+		const struct rte_flow_action actions[],
+		struct rte_flow_error *error)
+{
+	struct rte_eth_dev *dev = &rte_eth_devices[port_id];
+	struct rte_flow *flow;
+	const struct rte_flow_ops *ops = rte_flow_ops_get(port_id, error);
+
+	if (unlikely(!ops))
+		return NULL;
+	if (likely(!!ops->create)) {
+		flow = ops->create(dev, attr, pattern, actions, error);
+		if (flow == NULL)
+			flow_err(port_id, -rte_errno, error);
+		return flow;
+	}
+	rte_flow_error_set(error, ENOSYS, RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
+			   NULL, rte_strerror(ENOSYS));
+	return NULL;
+}
+
+/* Destroy a flow rule on a given port. */
+int
+rte_flow_destroy(uint16_t port_id,
+		 struct rte_flow *flow,
+		 struct rte_flow_error *error)
+{
+	struct rte_eth_dev *dev = &rte_eth_devices[port_id];
+	const struct rte_flow_ops *ops = rte_flow_ops_get(port_id, error);
+
+	if (unlikely(!ops))
+		return -rte_errno;
+	if (likely(!!ops->destroy))
+		return flow_err(port_id, ops->destroy(dev, flow, error),
+				error);
+	return rte_flow_error_set(error, ENOSYS,
+				  RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
+				  NULL, rte_strerror(ENOSYS));
+}
+
+/* Destroy all flow rules associated with a port. */
+int
+rte_flow_flush(uint16_t port_id,
+	       struct rte_flow_error *error)
+{
+	struct rte_eth_dev *dev = &rte_eth_devices[port_id];
+	const struct rte_flow_ops *ops = rte_flow_ops_get(port_id, error);
+
+	if (unlikely(!ops))
+		return -rte_errno;
+	if (likely(!!ops->flush))
+		return flow_err(port_id, ops->flush(dev, error), error);
+	return rte_flow_error_set(error, ENOSYS,
+				  RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
+				  NULL, rte_strerror(ENOSYS));
+}
+
+/* Query an existing flow rule. */
+int
+rte_flow_query(uint16_t port_id,
+	       struct rte_flow *flow,
+	       const struct rte_flow_action *action,
+	       void *data,
+	       struct rte_flow_error *error)
+{
+	struct rte_eth_dev *dev = &rte_eth_devices[port_id];
+	const struct rte_flow_ops *ops = rte_flow_ops_get(port_id, error);
+
+	if (!ops)
+		return -rte_errno;
+	if (likely(!!ops->query))
+		return flow_err(port_id, ops->query(dev, flow, action, data,
+						    error), error);
+	return rte_flow_error_set(error, ENOSYS,
+				  RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
+				  NULL, rte_strerror(ENOSYS));
+}
+
+/* Restrict ingress traffic to the defined flow rules. */
+int
+rte_flow_isolate(uint16_t port_id,
+		 int set,
+		 struct rte_flow_error *error)
+{
+	struct rte_eth_dev *dev = &rte_eth_devices[port_id];
+	const struct rte_flow_ops *ops = rte_flow_ops_get(port_id, error);
+
+	if (!ops)
+		return -rte_errno;
+	if (likely(!!ops->isolate))
+		return flow_err(port_id, ops->isolate(dev, set, error), error);
+	return rte_flow_error_set(error, ENOSYS,
+				  RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
+				  NULL, rte_strerror(ENOSYS));
+}
+
+/* Initialize flow error structure. */
+int
+rte_flow_error_set(struct rte_flow_error *error,
+		   int code,
+		   enum rte_flow_error_type type,
+		   const void *cause,
+		   const char *message)
+{
+	if (error) {
+		*error = (struct rte_flow_error){
+			.type = type,
+			.cause = cause,
+			.message = message,
+		};
+	}
+	rte_errno = code;
+	return -code;
+}
+
+/** Pattern item specification types. */
+enum rte_flow_conv_item_spec_type {
+	RTE_FLOW_CONV_ITEM_SPEC,
+	RTE_FLOW_CONV_ITEM_LAST,
+	RTE_FLOW_CONV_ITEM_MASK,
+};
+
+/**
+ * Copy pattern item specification.
+ *
+ * @param[out] buf
+ *   Output buffer. Can be NULL if @p size is zero.
+ * @param size
+ *   Size of @p buf in bytes.
+ * @param[in] item
+ *   Pattern item to copy specification from.
+ * @param type
+ *   Specification selector for either @p spec, @p last or @p mask.
+ *
+ * @return
+ *   Number of bytes needed to store pattern item specification regardless
+ *   of @p size. @p buf contents are truncated to @p size if not large
+ *   enough.
+ */
+static size_t
+rte_flow_conv_item_spec(void *buf, const size_t size,
+			const struct rte_flow_item *item,
+			enum rte_flow_conv_item_spec_type type)
+{
+	size_t off;
+	const void *data =
+		type == RTE_FLOW_CONV_ITEM_SPEC ? item->spec :
+		type == RTE_FLOW_CONV_ITEM_LAST ? item->last :
+		type == RTE_FLOW_CONV_ITEM_MASK ? item->mask :
+		NULL;
+
+	switch (item->type) {
+		union {
+			const struct rte_flow_item_raw *raw;
+		} spec;
+		union {
+			const struct rte_flow_item_raw *raw;
+		} last;
+		union {
+			const struct rte_flow_item_raw *raw;
+		} mask;
+		union {
+			const struct rte_flow_item_raw *raw;
+		} src;
+		union {
+			struct rte_flow_item_raw *raw;
+		} dst;
+		size_t tmp;
+
+	case RTE_FLOW_ITEM_TYPE_RAW:
+		spec.raw = item->spec;
+		last.raw = item->last ? item->last : item->spec;
+		mask.raw = item->mask ? item->mask : &rte_flow_item_raw_mask;
+		src.raw = data;
+		dst.raw = buf;
+		rte_memcpy(dst.raw,
+			   (&(struct rte_flow_item_raw){
+				.relative = src.raw->relative,
+				.search = src.raw->search,
+				.reserved = src.raw->reserved,
+				.offset = src.raw->offset,
+				.limit = src.raw->limit,
+				.length = src.raw->length,
+			   }),
+			   size > sizeof(*dst.raw) ? sizeof(*dst.raw) : size);
+		off = sizeof(*dst.raw);
+		if (type == RTE_FLOW_CONV_ITEM_SPEC ||
+		    (type == RTE_FLOW_CONV_ITEM_MASK &&
+		     ((spec.raw->length & mask.raw->length) >=
+		      (last.raw->length & mask.raw->length))))
+			tmp = spec.raw->length & mask.raw->length;
+		else
+			tmp = last.raw->length & mask.raw->length;
+		if (tmp) {
+			off = RTE_ALIGN_CEIL(off, sizeof(*dst.raw->pattern));
+			if (size >= off + tmp)
+				dst.raw->pattern = rte_memcpy
+					((void *)((uintptr_t)dst.raw + off),
+					 src.raw->pattern, tmp);
+			off += tmp;
+		}
+		break;
+	default:
+		off = rte_flow_desc_item[item->type].size;
+		rte_memcpy(buf, data, (size > off ? off : size));
+		break;
+	}
+	return off;
+}
+
+/**
+ * Copy action configuration.
+ *
+ * @param[out] buf
+ *   Output buffer. Can be NULL if @p size is zero.
+ * @param size
+ *   Size of @p buf in bytes.
+ * @param[in] action
+ *   Action to copy configuration from.
+ *
+ * @return
+ *   Number of bytes needed to store pattern item specification regardless
+ *   of @p size. @p buf contents are truncated to @p size if not large
+ *   enough.
+ */
+static size_t
+rte_flow_conv_action_conf(void *buf, const size_t size,
+			  const struct rte_flow_action *action)
+{
+	size_t off;
+
+	switch (action->type) {
+		union {
+			const struct rte_flow_action_rss *rss;
+			const struct rte_flow_action_vxlan_encap *vxlan_encap;
+			const struct rte_flow_action_nvgre_encap *nvgre_encap;
+		} src;
+		union {
+			struct rte_flow_action_rss *rss;
+			struct rte_flow_action_vxlan_encap *vxlan_encap;
+			struct rte_flow_action_nvgre_encap *nvgre_encap;
+		} dst;
+		size_t tmp;
+		int ret;
+
+	case RTE_FLOW_ACTION_TYPE_RSS:
+		src.rss = action->conf;
+		dst.rss = buf;
+		rte_memcpy(dst.rss,
+			   (&(struct rte_flow_action_rss){
+				.func = src.rss->func,
+				.level = src.rss->level,
+				.types = src.rss->types,
+				.key_len = src.rss->key_len,
+				.queue_num = src.rss->queue_num,
+			   }),
+			   size > sizeof(*dst.rss) ? sizeof(*dst.rss) : size);
+		off = sizeof(*dst.rss);
+		if (src.rss->key_len) {
+			off = RTE_ALIGN_CEIL(off, sizeof(*dst.rss->key));
+			tmp = sizeof(*src.rss->key) * src.rss->key_len;
+			if (size >= off + tmp)
+				dst.rss->key = rte_memcpy
+					((void *)((uintptr_t)dst.rss + off),
+					 src.rss->key, tmp);
+			off += tmp;
+		}
+		if (src.rss->queue_num) {
+			off = RTE_ALIGN_CEIL(off, sizeof(*dst.rss->queue));
+			tmp = sizeof(*src.rss->queue) * src.rss->queue_num;
+			if (size >= off + tmp)
+				dst.rss->queue = rte_memcpy
+					((void *)((uintptr_t)dst.rss + off),
+					 src.rss->queue, tmp);
+			off += tmp;
+		}
+		break;
+	case RTE_FLOW_ACTION_TYPE_VXLAN_ENCAP:
+	case RTE_FLOW_ACTION_TYPE_NVGRE_ENCAP:
+		src.vxlan_encap = action->conf;
+		dst.vxlan_encap = buf;
+		RTE_BUILD_BUG_ON(sizeof(*src.vxlan_encap) !=
+				 sizeof(*src.nvgre_encap) ||
+				 offsetof(struct rte_flow_action_vxlan_encap,
+					  definition) !=
+				 offsetof(struct rte_flow_action_nvgre_encap,
+					  definition));
+		off = sizeof(*dst.vxlan_encap);
+		if (src.vxlan_encap->definition) {
+			off = RTE_ALIGN_CEIL
+				(off, sizeof(*dst.vxlan_encap->definition));
+			ret = rte_flow_conv
+				(RTE_FLOW_CONV_OP_PATTERN,
+				 (void *)((uintptr_t)dst.vxlan_encap + off),
+				 size > off ? size - off : 0,
+				 src.vxlan_encap->definition, NULL);
+			if (ret < 0)
+				return 0;
+			if (size >= off + ret)
+				dst.vxlan_encap->definition =
+					(void *)((uintptr_t)dst.vxlan_encap +
+						 off);
+			off += ret;
+		}
+		break;
+	default:
+		off = rte_flow_desc_action[action->type].size;
+		rte_memcpy(buf, action->conf, (size > off ? off : size));
+		break;
+	}
+	return off;
+}
+
+/**
+ * Copy a list of pattern items.
+ *
+ * @param[out] dst
+ *   Destination buffer. Can be NULL if @p size is zero.
+ * @param size
+ *   Size of @p dst in bytes.
+ * @param[in] src
+ *   Source pattern items.
+ * @param num
+ *   Maximum number of pattern items to process from @p src or 0 to process
+ *   the entire list. In both cases, processing stops after
+ *   RTE_FLOW_ITEM_TYPE_END is encountered.
+ * @param[out] error
+ *   Perform verbose error reporting if not NULL.
+ *
+ * @return
+ *   A positive value representing the number of bytes needed to store
+ *   pattern items regardless of @p size on success (@p buf contents are
+ *   truncated to @p size if not large enough), a negative errno value
+ *   otherwise and rte_errno is set.
+ */
+static int
+rte_flow_conv_pattern(struct rte_flow_item *dst,
+		      const size_t size,
+		      const struct rte_flow_item *src,
+		      unsigned int num,
+		      struct rte_flow_error *error)
+{
+	uintptr_t data = (uintptr_t)dst;
+	size_t off;
+	size_t ret;
+	unsigned int i;
+
+	for (i = 0, off = 0; !num || i != num; ++i, ++src, ++dst) {
+		if ((size_t)src->type >= RTE_DIM(rte_flow_desc_item) ||
+		    !rte_flow_desc_item[src->type].name)
+			return rte_flow_error_set
+				(error, ENOTSUP, RTE_FLOW_ERROR_TYPE_ITEM, src,
+				 "cannot convert unknown item type");
+		if (size >= off + sizeof(*dst))
+			*dst = (struct rte_flow_item){
+				.type = src->type,
+			};
+		off += sizeof(*dst);
+		if (!src->type)
+			num = i + 1;
+	}
+	num = i;
+	src -= num;
+	dst -= num;
+	do {
+		if (src->spec) {
+			off = RTE_ALIGN_CEIL(off, sizeof(double));
+			ret = rte_flow_conv_item_spec
+				((void *)(data + off),
+				 size > off ? size - off : 0, src,
+				 RTE_FLOW_CONV_ITEM_SPEC);
+			if (size && size >= off + ret)
+				dst->spec = (void *)(data + off);
+			off += ret;
+
+		}
+		if (src->last) {
+			off = RTE_ALIGN_CEIL(off, sizeof(double));
+			ret = rte_flow_conv_item_spec
+				((void *)(data + off),
+				 size > off ? size - off : 0, src,
+				 RTE_FLOW_CONV_ITEM_LAST);
+			if (size && size >= off + ret)
+				dst->last = (void *)(data + off);
+			off += ret;
+		}
+		if (src->mask) {
+			off = RTE_ALIGN_CEIL(off, sizeof(double));
+			ret = rte_flow_conv_item_spec
+				((void *)(data + off),
+				 size > off ? size - off : 0, src,
+				 RTE_FLOW_CONV_ITEM_MASK);
+			if (size && size >= off + ret)
+				dst->mask = (void *)(data + off);
+			off += ret;
+		}
+		++src;
+		++dst;
+	} while (--num);
+	return off;
+}
+
+/**
+ * Copy a list of actions.
+ *
+ * @param[out] dst
+ *   Destination buffer. Can be NULL if @p size is zero.
+ * @param size
+ *   Size of @p dst in bytes.
+ * @param[in] src
+ *   Source actions.
+ * @param num
+ *   Maximum number of actions to process from @p src or 0 to process the
+ *   entire list. In both cases, processing stops after
+ *   RTE_FLOW_ACTION_TYPE_END is encountered.
+ * @param[out] error
+ *   Perform verbose error reporting if not NULL.
+ *
+ * @return
+ *   A positive value representing the number of bytes needed to store
+ *   actions regardless of @p size on success (@p buf contents are truncated
+ *   to @p size if not large enough), a negative errno value otherwise and
+ *   rte_errno is set.
+ */
+static int
+rte_flow_conv_actions(struct rte_flow_action *dst,
+		      const size_t size,
+		      const struct rte_flow_action *src,
+		      unsigned int num,
+		      struct rte_flow_error *error)
+{
+	uintptr_t data = (uintptr_t)dst;
+	size_t off;
+	size_t ret;
+	unsigned int i;
+
+	for (i = 0, off = 0; !num || i != num; ++i, ++src, ++dst) {
+		if ((size_t)src->type >= RTE_DIM(rte_flow_desc_action) ||
+		    !rte_flow_desc_action[src->type].name)
+			return rte_flow_error_set
+				(error, ENOTSUP, RTE_FLOW_ERROR_TYPE_ACTION,
+				 src, "cannot convert unknown action type");
+		if (size >= off + sizeof(*dst))
+			*dst = (struct rte_flow_action){
+				.type = src->type,
+			};
+		off += sizeof(*dst);
+		if (!src->type)
+			num = i + 1;
+	}
+	num = i;
+	src -= num;
+	dst -= num;
+	do {
+		if (src->conf) {
+			off = RTE_ALIGN_CEIL(off, sizeof(double));
+			ret = rte_flow_conv_action_conf
+				((void *)(data + off),
+				 size > off ? size - off : 0, src);
+			if (size && size >= off + ret)
+				dst->conf = (void *)(data + off);
+			off += ret;
+		}
+		++src;
+		++dst;
+	} while (--num);
+	return off;
+}
+
+/**
+ * Copy flow rule components.
+ *
+ * This comprises the flow rule descriptor itself, attributes, pattern and
+ * actions list. NULL components in @p src are skipped.
+ *
+ * @param[out] dst
+ *   Destination buffer. Can be NULL if @p size is zero.
+ * @param size
+ *   Size of @p dst in bytes.
+ * @param[in] src
+ *   Source flow rule descriptor.
+ * @param[out] error
+ *   Perform verbose error reporting if not NULL.
+ *
+ * @return
+ *   A positive value representing the number of bytes needed to store all
+ *   components including the descriptor regardless of @p size on success
+ *   (@p buf contents are truncated to @p size if not large enough), a
+ *   negative errno value otherwise and rte_errno is set.
+ */
+static int
+rte_flow_conv_rule(struct rte_flow_conv_rule *dst,
+		   const size_t size,
+		   const struct rte_flow_conv_rule *src,
+		   struct rte_flow_error *error)
+{
+	size_t off;
+	int ret;
+
+	rte_memcpy(dst,
+		   (&(struct rte_flow_conv_rule){
+			.attr = NULL,
+			.pattern = NULL,
+			.actions = NULL,
+		   }),
+		   size > sizeof(*dst) ? sizeof(*dst) : size);
+	off = sizeof(*dst);
+	if (src->attr_ro) {
+		off = RTE_ALIGN_CEIL(off, sizeof(double));
+		if (size && size >= off + sizeof(*dst->attr))
+			dst->attr = rte_memcpy
+				((void *)((uintptr_t)dst + off),
+				 src->attr_ro, sizeof(*dst->attr));
+		off += sizeof(*dst->attr);
+	}
+	if (src->pattern_ro) {
+		off = RTE_ALIGN_CEIL(off, sizeof(double));
+		ret = rte_flow_conv_pattern((void *)((uintptr_t)dst + off),
+					    size > off ? size - off : 0,
+					    src->pattern_ro, 0, error);
+		if (ret < 0)
+			return ret;
+		if (size && size >= off + (size_t)ret)
+			dst->pattern = (void *)((uintptr_t)dst + off);
+		off += ret;
+	}
+	if (src->actions_ro) {
+		off = RTE_ALIGN_CEIL(off, sizeof(double));
+		ret = rte_flow_conv_actions((void *)((uintptr_t)dst + off),
+					    size > off ? size - off : 0,
+					    src->actions_ro, 0, error);
+		if (ret < 0)
+			return ret;
+		if (size >= off + (size_t)ret)
+			dst->actions = (void *)((uintptr_t)dst + off);
+		off += ret;
+	}
+	return off;
+}
+
+/**
+ * Retrieve the name of a pattern item/action type.
+ *
+ * @param is_action
+ *   Nonzero when @p src represents an action type instead of a pattern item
+ *   type.
+ * @param is_ptr
+ *   Nonzero to write string address instead of contents into @p dst.
+ * @param[out] dst
+ *   Destination buffer. Can be NULL if @p size is zero.
+ * @param size
+ *   Size of @p dst in bytes.
+ * @param[in] src
+ *   Depending on @p is_action, source pattern item or action type cast as a
+ *   pointer.
+ * @param[out] error
+ *   Perform verbose error reporting if not NULL.
+ *
+ * @return
+ *   A positive value representing the number of bytes needed to store the
+ *   name or its address regardless of @p size on success (@p buf contents
+ *   are truncated to @p size if not large enough), a negative errno value
+ *   otherwise and rte_errno is set.
+ */
+static int
+rte_flow_conv_name(int is_action,
+		   int is_ptr,
+		   char *dst,
+		   const size_t size,
+		   const void *src,
+		   struct rte_flow_error *error)
+{
+	struct desc_info {
+		const struct rte_flow_desc_data *data;
+		size_t num;
+	};
+	static const struct desc_info info_rep[2] = {
+		{ rte_flow_desc_item, RTE_DIM(rte_flow_desc_item), },
+		{ rte_flow_desc_action, RTE_DIM(rte_flow_desc_action), },
+	};
+	const struct desc_info *const info = &info_rep[!!is_action];
+	unsigned int type = (uintptr_t)src;
+
+	if (type >= info->num)
+		return rte_flow_error_set
+			(error, EINVAL, RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
+			 "unknown object type to retrieve the name of");
+	if (!is_ptr)
+		return strlcpy(dst, info->data[type].name, size);
+	if (size >= sizeof(const char **))
+		*((const char **)dst) = info->data[type].name;
+	return sizeof(const char **);
+}
+
+/** Helper function to convert flow API objects. */
+int
+rte_flow_conv(enum rte_flow_conv_op op,
+	      void *dst,
+	      size_t size,
+	      const void *src,
+	      struct rte_flow_error *error)
+{
+	switch (op) {
+		const struct rte_flow_attr *attr;
+
+	case RTE_FLOW_CONV_OP_NONE:
+		return 0;
+	case RTE_FLOW_CONV_OP_ATTR:
+		attr = src;
+		if (size > sizeof(*attr))
+			size = sizeof(*attr);
+		rte_memcpy(dst, attr, size);
+		return sizeof(*attr);
+	case RTE_FLOW_CONV_OP_ITEM:
+		return rte_flow_conv_pattern(dst, size, src, 1, error);
+	case RTE_FLOW_CONV_OP_ACTION:
+		return rte_flow_conv_actions(dst, size, src, 1, error);
+	case RTE_FLOW_CONV_OP_PATTERN:
+		return rte_flow_conv_pattern(dst, size, src, 0, error);
+	case RTE_FLOW_CONV_OP_ACTIONS:
+		return rte_flow_conv_actions(dst, size, src, 0, error);
+	case RTE_FLOW_CONV_OP_RULE:
+		return rte_flow_conv_rule(dst, size, src, error);
+	case RTE_FLOW_CONV_OP_ITEM_NAME:
+		return rte_flow_conv_name(0, 0, dst, size, src, error);
+	case RTE_FLOW_CONV_OP_ACTION_NAME:
+		return rte_flow_conv_name(1, 0, dst, size, src, error);
+	case RTE_FLOW_CONV_OP_ITEM_NAME_PTR:
+		return rte_flow_conv_name(0, 1, dst, size, src, error);
+	case RTE_FLOW_CONV_OP_ACTION_NAME_PTR:
+		return rte_flow_conv_name(1, 1, dst, size, src, error);
+	}
+	return rte_flow_error_set
+		(error, ENOTSUP, RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
+		 "unknown object conversion operation");
+}
+
+/** Store a full rte_flow description. */
+size_t
+rte_flow_copy(struct rte_flow_desc *desc, size_t len,
+	      const struct rte_flow_attr *attr,
+	      const struct rte_flow_item *items,
+	      const struct rte_flow_action *actions)
+{
+	/*
+	 * Overlap struct rte_flow_conv with struct rte_flow_desc in order
+	 * to convert the former to the latter without wasting space.
+	 */
+	struct rte_flow_conv_rule *dst =
+		len ?
+		(void *)((uintptr_t)desc +
+			 (offsetof(struct rte_flow_desc, actions) -
+			  offsetof(struct rte_flow_conv_rule, actions))) :
+		NULL;
+	size_t dst_size =
+		len > sizeof(*desc) - sizeof(*dst) ?
+		len - (sizeof(*desc) - sizeof(*dst)) :
+		0;
+	struct rte_flow_conv_rule src = {
+		.attr_ro = NULL,
+		.pattern_ro = items,
+		.actions_ro = actions,
+	};
+	int ret;
+
+	RTE_BUILD_BUG_ON(sizeof(struct rte_flow_desc) <
+			 sizeof(struct rte_flow_conv_rule));
+	if (dst_size &&
+	    (&dst->pattern != &desc->items ||
+	     &dst->actions != &desc->actions ||
+	     (uintptr_t)(dst + 1) != (uintptr_t)(desc + 1))) {
+		rte_errno = EINVAL;
+		return 0;
+	}
+	ret = rte_flow_conv(RTE_FLOW_CONV_OP_RULE, dst, dst_size, &src, NULL);
+	if (ret < 0)
+		return 0;
+	ret += sizeof(*desc) - sizeof(*dst);
+	rte_memcpy(desc,
+		   (&(struct rte_flow_desc){
+			.size = ret,
+			.attr = *attr,
+			.items = dst_size ? dst->pattern : NULL,
+			.actions = dst_size ? dst->actions : NULL,
+		   }),
+		   len > sizeof(*desc) ? sizeof(*desc) : len);
+	return ret;
+}
+
+/**
+ * Expand RSS flows into several possible flows according to the RSS hash
+ * fields requested and the driver capabilities.
+ */
+int
+rte_flow_expand_rss(struct rte_flow_expand_rss *buf, size_t size,
+		    const struct rte_flow_item *pattern, uint64_t types,
+		    const struct rte_flow_expand_node graph[],
+		    int graph_root_index)
+{
+	const int elt_n = 8;
+	const struct rte_flow_item *item;
+	const struct rte_flow_expand_node *node = &graph[graph_root_index];
+	const int *next_node;
+	const int *stack[elt_n];
+	int stack_pos = 0;
+	struct rte_flow_item flow_items[elt_n];
+	unsigned int i;
+	size_t lsize;
+	size_t user_pattern_size = 0;
+	void *addr = NULL;
+	const struct rte_flow_expand_node *next = NULL;
+	struct rte_flow_item missed_item;
+	int missed = 0;
+	int elt = 0;
+	const struct rte_flow_item *last_item = NULL;
+
+	memset(&missed_item, 0, sizeof(missed_item));
+	lsize = offsetof(struct rte_flow_expand_rss, entry) +
+		elt_n * sizeof(buf->entry[0]);
+	if (lsize <= size) {
+		buf->entry[0].priority = 0;
+		buf->entry[0].pattern = (void *)&buf->entry[elt_n];
+		buf->entries = 0;
+		addr = buf->entry[0].pattern;
+	}
+	for (item = pattern; item->type != RTE_FLOW_ITEM_TYPE_END; item++) {
+		if (item->type != RTE_FLOW_ITEM_TYPE_VOID)
+			last_item = item;
+		for (i = 0; node->next && node->next[i]; ++i) {
+			next = &graph[node->next[i]];
+			if (next->type == item->type)
+				break;
+		}
+		if (next)
+			node = next;
+		user_pattern_size += sizeof(*item);
+	}
+	user_pattern_size += sizeof(*item); /* Handle END item. */
+	lsize += user_pattern_size;
+	/* Copy the user pattern in the first entry of the buffer. */
+	if (lsize <= size) {
+		rte_memcpy(addr, pattern, user_pattern_size);
+		addr = (void *)(((uintptr_t)addr) + user_pattern_size);
+		buf->entries = 1;
+	}
+	/* Start expanding. */
+	memset(flow_items, 0, sizeof(flow_items));
+	user_pattern_size -= sizeof(*item);
+	/*
+	 * Check if the last valid item has spec set
+	 * and need complete pattern.
+	 */
+	missed_item.type = rte_flow_expand_rss_item_complete(last_item);
+	if (missed_item.type != RTE_FLOW_ITEM_TYPE_VOID) {
+		next = NULL;
+		missed = 1;
+		for (i = 0; node->next && node->next[i]; ++i) {
+			next = &graph[node->next[i]];
+			if (next->type == missed_item.type) {
+				flow_items[0].type = missed_item.type;
+				flow_items[1].type = RTE_FLOW_ITEM_TYPE_END;
+				break;
+			}
+			next = NULL;
+		}
+	}
+	if (next && missed) {
+		elt = 2; /* missed item + item end. */
+		node = next;
+		lsize += elt * sizeof(*item) + user_pattern_size;
+		if ((node->rss_types & types) && lsize <= size) {
+			buf->entry[buf->entries].priority = 1;
+			buf->entry[buf->entries].pattern = addr;
+			buf->entries++;
+			rte_memcpy(addr, buf->entry[0].pattern,
+				   user_pattern_size);
+			addr = (void *)(((uintptr_t)addr) + user_pattern_size);
+			rte_memcpy(addr, flow_items, elt * sizeof(*item));
+			addr = (void *)(((uintptr_t)addr) +
+					elt * sizeof(*item));
+		}
+	}
+	memset(flow_items, 0, sizeof(flow_items));
+	next_node = node->next;
+	stack[stack_pos] = next_node;
+	node = next_node ? &graph[*next_node] : NULL;
+	while (node) {
+		flow_items[stack_pos].type = node->type;
+		if (node->rss_types & types) {
+			/*
+			 * compute the number of items to copy from the
+			 * expansion and copy it.
+			 * When the stack_pos is 0, there are 1 element in it,
+			 * plus the addition END item.
+			 */
+			elt = stack_pos + 2;
+			flow_items[stack_pos + 1].type = RTE_FLOW_ITEM_TYPE_END;
+			lsize += elt * sizeof(*item) + user_pattern_size;
+			if (lsize <= size) {
+				size_t n = elt * sizeof(*item);
+
+				buf->entry[buf->entries].priority =
+					stack_pos + 1 + missed;
+				buf->entry[buf->entries].pattern = addr;
+				buf->entries++;
+				rte_memcpy(addr, buf->entry[0].pattern,
+					   user_pattern_size);
+				addr = (void *)(((uintptr_t)addr) +
+						user_pattern_size);
+				rte_memcpy(addr, &missed_item,
+					   missed * sizeof(*item));
+				addr = (void *)(((uintptr_t)addr) +
+					missed * sizeof(*item));
+				rte_memcpy(addr, flow_items, n);
+				addr = (void *)(((uintptr_t)addr) + n);
+			}
+		}
+		/* Go deeper. */
+		if (node->next) {
+			next_node = node->next;
+			if (stack_pos++ == elt_n) {
+				rte_errno = E2BIG;
+				return -rte_errno;
+			}
+			stack[stack_pos] = next_node;
+		} else if (*(next_node + 1)) {
+			/* Follow up with the next possibility. */
+			++next_node;
+		} else {
+			/* Move to the next path. */
+			if (stack_pos)
+				next_node = stack[--stack_pos];
+			next_node++;
+			stack[stack_pos] = next_node;
+		}
+		node = *next_node ? &graph[*next_node] : NULL;
+	};
+	/* no expanded flows but we have missed item, create one rule for it */
+	if (buf->entries == 1 && missed != 0) {
+		elt = 2;
+		lsize += elt * sizeof(*item) + user_pattern_size;
+		if (lsize <= size) {
+			buf->entry[buf->entries].priority = 1;
+			buf->entry[buf->entries].pattern = addr;
+			buf->entries++;
+			flow_items[0].type = missed_item.type;
+			flow_items[1].type = RTE_FLOW_ITEM_TYPE_END;
+			rte_memcpy(addr, buf->entry[0].pattern,
+				   user_pattern_size);
+			addr = (void *)(((uintptr_t)addr) + user_pattern_size);
+			rte_memcpy(addr, flow_items, elt * sizeof(*item));
+			addr = (void *)(((uintptr_t)addr) +
+					elt * sizeof(*item));
+		}
+	}
+	return lsize;
+}
+
+int
+rte_flow_dev_dump(uint16_t port_id, FILE *file, struct rte_flow_error *error)
+{
+	struct rte_eth_dev *dev = &rte_eth_devices[port_id];
+	const struct rte_flow_ops *ops = rte_flow_ops_get(port_id, error);
+
+	if (unlikely(!ops))
+		return -rte_errno;
+	if (likely(!!ops->dev_dump))
+		return flow_err(port_id, ops->dev_dump(dev, file, error),
+				error);
+	return rte_flow_error_set(error, ENOSYS,
+				  RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
+				  NULL, rte_strerror(ENOSYS));
+}
+
+int
+rte_flow_get_aged_flows(uint16_t port_id, void **contexts,
+		    uint32_t nb_contexts, struct rte_flow_error *error)
+{
+	struct rte_eth_dev *dev = &rte_eth_devices[port_id];
+	const struct rte_flow_ops *ops = rte_flow_ops_get(port_id, error);
+
+	if (unlikely(!ops))
+		return -rte_errno;
+	if (likely(!!ops->get_aged_flows))
+		return flow_err(port_id, ops->get_aged_flows(dev, contexts,
+				nb_contexts, error), error);
+	return rte_flow_error_set(error, ENOTSUP,
+				  RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
+				  NULL, rte_strerror(ENOTSUP));
+}