intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 1024 insertions, 0 deletions

diff --git a/contrib/libs/linux-headers/linux/openvswitch.h b/contrib/libs/linux-headers/linux/openvswitch.h
new file mode 100644
index 0000000000..ae4651c248
--- /dev/null
+++ b/contrib/libs/linux-headers/linux/openvswitch.h
@@ -0,0 +1,1024 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+
+/*
+ * Copyright (c) 2007-2017 Nicira, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ */
+
+#ifndef __LINUX_OPENVSWITCH_H
+#define __LINUX_OPENVSWITCH_H 1
+
+#include <linux/types.h>
+#include <linux/if_ether.h>
+
+/**
+ * struct ovs_header - header for OVS Generic Netlink messages.
+ * @dp_ifindex: ifindex of local port for datapath (0 to make a request not
+ * specific to a datapath).
+ *
+ * Attributes following the header are specific to a particular OVS Generic
+ * Netlink family, but all of the OVS families use this header.
+ */
+
+struct ovs_header {
+	int dp_ifindex;
+};
+
+/* Datapaths. */
+
+#define OVS_DATAPATH_FAMILY  "ovs_datapath"
+#define OVS_DATAPATH_MCGROUP "ovs_datapath"
+
+/* V2:
+ *   - API users are expected to provide OVS_DP_ATTR_USER_FEATURES
+ *     when creating the datapath.
+ */
+#define OVS_DATAPATH_VERSION 2
+
+/* First OVS datapath version to support features */
+#define OVS_DP_VER_FEATURES 2
+
+enum ovs_datapath_cmd {
+	OVS_DP_CMD_UNSPEC,
+	OVS_DP_CMD_NEW,
+	OVS_DP_CMD_DEL,
+	OVS_DP_CMD_GET,
+	OVS_DP_CMD_SET
+};
+
+/**
+ * enum ovs_datapath_attr - attributes for %OVS_DP_* commands.
+ * @OVS_DP_ATTR_NAME: Name of the network device that serves as the "local
+ * port".  This is the name of the network device whose dp_ifindex is given in
+ * the &struct ovs_header.  Always present in notifications.  Required in
+ * %OVS_DP_NEW requests.  May be used as an alternative to specifying
+ * dp_ifindex in other requests (with a dp_ifindex of 0).
+ * @OVS_DP_ATTR_UPCALL_PID: The Netlink socket in userspace that is initially
+ * set on the datapath port (for OVS_ACTION_ATTR_MISS).  Only valid on
+ * %OVS_DP_CMD_NEW requests. A value of zero indicates that upcalls should
+ * not be sent.
+ * @OVS_DP_ATTR_STATS: Statistics about packets that have passed through the
+ * datapath.  Always present in notifications.
+ * @OVS_DP_ATTR_MEGAFLOW_STATS: Statistics about mega flow masks usage for the
+ * datapath. Always present in notifications.
+ *
+ * These attributes follow the &struct ovs_header within the Generic Netlink
+ * payload for %OVS_DP_* commands.
+ */
+enum ovs_datapath_attr {
+	OVS_DP_ATTR_UNSPEC,
+	OVS_DP_ATTR_NAME,		/* name of dp_ifindex netdev */
+	OVS_DP_ATTR_UPCALL_PID,		/* Netlink PID to receive upcalls */
+	OVS_DP_ATTR_STATS,		/* struct ovs_dp_stats */
+	OVS_DP_ATTR_MEGAFLOW_STATS,	/* struct ovs_dp_megaflow_stats */
+	OVS_DP_ATTR_USER_FEATURES,	/* OVS_DP_F_*  */
+	OVS_DP_ATTR_PAD,
+	__OVS_DP_ATTR_MAX
+};
+
+#define OVS_DP_ATTR_MAX (__OVS_DP_ATTR_MAX - 1)
+
+struct ovs_dp_stats {
+	__u64 n_hit;             /* Number of flow table matches. */
+	__u64 n_missed;          /* Number of flow table misses. */
+	__u64 n_lost;            /* Number of misses not sent to userspace. */
+	__u64 n_flows;           /* Number of flows present */
+};
+
+struct ovs_dp_megaflow_stats {
+	__u64 n_mask_hit;	 /* Number of masks used for flow lookups. */
+	__u32 n_masks;		 /* Number of masks for the datapath. */
+	__u32 pad0;		 /* Pad for future expension. */
+	__u64 pad1;		 /* Pad for future expension. */
+	__u64 pad2;		 /* Pad for future expension. */
+};
+
+struct ovs_vport_stats {
+	__u64   rx_packets;		/* total packets received       */
+	__u64   tx_packets;		/* total packets transmitted    */
+	__u64   rx_bytes;		/* total bytes received         */
+	__u64   tx_bytes;		/* total bytes transmitted      */
+	__u64   rx_errors;		/* bad packets received         */
+	__u64   tx_errors;		/* packet transmit problems     */
+	__u64   rx_dropped;		/* no space in linux buffers    */
+	__u64   tx_dropped;		/* no space available in linux  */
+};
+
+/* Allow last Netlink attribute to be unaligned */
+#define OVS_DP_F_UNALIGNED	(1 << 0)
+
+/* Allow datapath to associate multiple Netlink PIDs to each vport */
+#define OVS_DP_F_VPORT_PIDS	(1 << 1)
+
+/* Allow tc offload recirc sharing */
+#define OVS_DP_F_TC_RECIRC_SHARING	(1 << 2)
+
+/* Fixed logical ports. */
+#define OVSP_LOCAL      ((__u32)0)
+
+/* Packet transfer. */
+
+#define OVS_PACKET_FAMILY "ovs_packet"
+#define OVS_PACKET_VERSION 0x1
+
+enum ovs_packet_cmd {
+	OVS_PACKET_CMD_UNSPEC,
+
+	/* Kernel-to-user notifications. */
+	OVS_PACKET_CMD_MISS,    /* Flow table miss. */
+	OVS_PACKET_CMD_ACTION,  /* OVS_ACTION_ATTR_USERSPACE action. */
+
+	/* Userspace commands. */
+	OVS_PACKET_CMD_EXECUTE  /* Apply actions to a packet. */
+};
+
+/**
+ * enum ovs_packet_attr - attributes for %OVS_PACKET_* commands.
+ * @OVS_PACKET_ATTR_PACKET: Present for all notifications.  Contains the entire
+ * packet as received, from the start of the Ethernet header onward.  For
+ * %OVS_PACKET_CMD_ACTION, %OVS_PACKET_ATTR_PACKET reflects changes made by
+ * actions preceding %OVS_ACTION_ATTR_USERSPACE, but %OVS_PACKET_ATTR_KEY is
+ * the flow key extracted from the packet as originally received.
+ * @OVS_PACKET_ATTR_KEY: Present for all notifications.  Contains the flow key
+ * extracted from the packet as nested %OVS_KEY_ATTR_* attributes.  This allows
+ * userspace to adapt its flow setup strategy by comparing its notion of the
+ * flow key against the kernel's.
+ * @OVS_PACKET_ATTR_ACTIONS: Contains actions for the packet.  Used
+ * for %OVS_PACKET_CMD_EXECUTE.  It has nested %OVS_ACTION_ATTR_* attributes.
+ * Also used in upcall when %OVS_ACTION_ATTR_USERSPACE has optional
+ * %OVS_USERSPACE_ATTR_ACTIONS attribute.
+ * @OVS_PACKET_ATTR_USERDATA: Present for an %OVS_PACKET_CMD_ACTION
+ * notification if the %OVS_ACTION_ATTR_USERSPACE action specified an
+ * %OVS_USERSPACE_ATTR_USERDATA attribute, with the same length and content
+ * specified there.
+ * @OVS_PACKET_ATTR_EGRESS_TUN_KEY: Present for an %OVS_PACKET_CMD_ACTION
+ * notification if the %OVS_ACTION_ATTR_USERSPACE action specified an
+ * %OVS_USERSPACE_ATTR_EGRESS_TUN_PORT attribute, which is sent only if the
+ * output port is actually a tunnel port. Contains the output tunnel key
+ * extracted from the packet as nested %OVS_TUNNEL_KEY_ATTR_* attributes.
+ * @OVS_PACKET_ATTR_MRU: Present for an %OVS_PACKET_CMD_ACTION and
+ * @OVS_PACKET_ATTR_LEN: Packet size before truncation.
+ * %OVS_PACKET_ATTR_USERSPACE action specify the Maximum received fragment
+ * size.
+ * @OVS_PACKET_ATTR_HASH: Packet hash info (e.g. hash, sw_hash and l4_hash in skb).
+ *
+ * These attributes follow the &struct ovs_header within the Generic Netlink
+ * payload for %OVS_PACKET_* commands.
+ */
+enum ovs_packet_attr {
+	OVS_PACKET_ATTR_UNSPEC,
+	OVS_PACKET_ATTR_PACKET,      /* Packet data. */
+	OVS_PACKET_ATTR_KEY,         /* Nested OVS_KEY_ATTR_* attributes. */
+	OVS_PACKET_ATTR_ACTIONS,     /* Nested OVS_ACTION_ATTR_* attributes. */
+	OVS_PACKET_ATTR_USERDATA,    /* OVS_ACTION_ATTR_USERSPACE arg. */
+	OVS_PACKET_ATTR_EGRESS_TUN_KEY,  /* Nested OVS_TUNNEL_KEY_ATTR_*
+					    attributes. */
+	OVS_PACKET_ATTR_UNUSED1,
+	OVS_PACKET_ATTR_UNUSED2,
+	OVS_PACKET_ATTR_PROBE,      /* Packet operation is a feature probe,
+				       error logging should be suppressed. */
+	OVS_PACKET_ATTR_MRU,	    /* Maximum received IP fragment size. */
+	OVS_PACKET_ATTR_LEN,	    /* Packet size before truncation. */
+	OVS_PACKET_ATTR_HASH,	    /* Packet hash. */
+	__OVS_PACKET_ATTR_MAX
+};
+
+#define OVS_PACKET_ATTR_MAX (__OVS_PACKET_ATTR_MAX - 1)
+
+/* Virtual ports. */
+
+#define OVS_VPORT_FAMILY  "ovs_vport"
+#define OVS_VPORT_MCGROUP "ovs_vport"
+#define OVS_VPORT_VERSION 0x1
+
+enum ovs_vport_cmd {
+	OVS_VPORT_CMD_UNSPEC,
+	OVS_VPORT_CMD_NEW,
+	OVS_VPORT_CMD_DEL,
+	OVS_VPORT_CMD_GET,
+	OVS_VPORT_CMD_SET
+};
+
+enum ovs_vport_type {
+	OVS_VPORT_TYPE_UNSPEC,
+	OVS_VPORT_TYPE_NETDEV,   /* network device */
+	OVS_VPORT_TYPE_INTERNAL, /* network device implemented by datapath */
+	OVS_VPORT_TYPE_GRE,      /* GRE tunnel. */
+	OVS_VPORT_TYPE_VXLAN,	 /* VXLAN tunnel. */
+	OVS_VPORT_TYPE_GENEVE,	 /* Geneve tunnel. */
+	__OVS_VPORT_TYPE_MAX
+};
+
+#define OVS_VPORT_TYPE_MAX (__OVS_VPORT_TYPE_MAX - 1)
+
+/**
+ * enum ovs_vport_attr - attributes for %OVS_VPORT_* commands.
+ * @OVS_VPORT_ATTR_PORT_NO: 32-bit port number within datapath.
+ * @OVS_VPORT_ATTR_TYPE: 32-bit %OVS_VPORT_TYPE_* constant describing the type
+ * of vport.
+ * @OVS_VPORT_ATTR_NAME: Name of vport.  For a vport based on a network device
+ * this is the name of the network device.  Maximum length %IFNAMSIZ-1 bytes
+ * plus a null terminator.
+ * @OVS_VPORT_ATTR_OPTIONS: Vport-specific configuration information.
+ * @OVS_VPORT_ATTR_UPCALL_PID: The array of Netlink socket pids in userspace
+ * among which OVS_PACKET_CMD_MISS upcalls will be distributed for packets
+ * received on this port.  If this is a single-element array of value 0,
+ * upcalls should not be sent.
+ * @OVS_VPORT_ATTR_STATS: A &struct ovs_vport_stats giving statistics for
+ * packets sent or received through the vport.
+ *
+ * These attributes follow the &struct ovs_header within the Generic Netlink
+ * payload for %OVS_VPORT_* commands.
+ *
+ * For %OVS_VPORT_CMD_NEW requests, the %OVS_VPORT_ATTR_TYPE and
+ * %OVS_VPORT_ATTR_NAME attributes are required.  %OVS_VPORT_ATTR_PORT_NO is
+ * optional; if not specified a free port number is automatically selected.
+ * Whether %OVS_VPORT_ATTR_OPTIONS is required or optional depends on the type
+ * of vport.
+ *
+ * For other requests, if %OVS_VPORT_ATTR_NAME is specified then it is used to
+ * look up the vport to operate on; otherwise dp_idx from the &struct
+ * ovs_header plus %OVS_VPORT_ATTR_PORT_NO determine the vport.
+ */
+enum ovs_vport_attr {
+	OVS_VPORT_ATTR_UNSPEC,
+	OVS_VPORT_ATTR_PORT_NO,	/* u32 port number within datapath */
+	OVS_VPORT_ATTR_TYPE,	/* u32 OVS_VPORT_TYPE_* constant. */
+	OVS_VPORT_ATTR_NAME,	/* string name, up to IFNAMSIZ bytes long */
+	OVS_VPORT_ATTR_OPTIONS, /* nested attributes, varies by vport type */
+	OVS_VPORT_ATTR_UPCALL_PID, /* array of u32 Netlink socket PIDs for */
+				/* receiving upcalls */
+	OVS_VPORT_ATTR_STATS,	/* struct ovs_vport_stats */
+	OVS_VPORT_ATTR_PAD,
+	OVS_VPORT_ATTR_IFINDEX,
+	OVS_VPORT_ATTR_NETNSID,
+	__OVS_VPORT_ATTR_MAX
+};
+
+#define OVS_VPORT_ATTR_MAX (__OVS_VPORT_ATTR_MAX - 1)
+
+enum {
+	OVS_VXLAN_EXT_UNSPEC,
+	OVS_VXLAN_EXT_GBP,	/* Flag or __u32 */
+	__OVS_VXLAN_EXT_MAX,
+};
+
+#define OVS_VXLAN_EXT_MAX (__OVS_VXLAN_EXT_MAX - 1)
+
+
+/* OVS_VPORT_ATTR_OPTIONS attributes for tunnels.
+ */
+enum {
+	OVS_TUNNEL_ATTR_UNSPEC,
+	OVS_TUNNEL_ATTR_DST_PORT, /* 16-bit UDP port, used by L4 tunnels. */
+	OVS_TUNNEL_ATTR_EXTENSION,
+	__OVS_TUNNEL_ATTR_MAX
+};
+
+#define OVS_TUNNEL_ATTR_MAX (__OVS_TUNNEL_ATTR_MAX - 1)
+
+/* Flows. */
+
+#define OVS_FLOW_FAMILY  "ovs_flow"
+#define OVS_FLOW_MCGROUP "ovs_flow"
+#define OVS_FLOW_VERSION 0x1
+
+enum ovs_flow_cmd {
+	OVS_FLOW_CMD_UNSPEC,
+	OVS_FLOW_CMD_NEW,
+	OVS_FLOW_CMD_DEL,
+	OVS_FLOW_CMD_GET,
+	OVS_FLOW_CMD_SET
+};
+
+struct ovs_flow_stats {
+	__u64 n_packets;         /* Number of matched packets. */
+	__u64 n_bytes;           /* Number of matched bytes. */
+};
+
+enum ovs_key_attr {
+	OVS_KEY_ATTR_UNSPEC,
+	OVS_KEY_ATTR_ENCAP,	/* Nested set of encapsulated attributes. */
+	OVS_KEY_ATTR_PRIORITY,  /* u32 skb->priority */
+	OVS_KEY_ATTR_IN_PORT,   /* u32 OVS dp port number */
+	OVS_KEY_ATTR_ETHERNET,  /* struct ovs_key_ethernet */
+	OVS_KEY_ATTR_VLAN,	/* be16 VLAN TCI */
+	OVS_KEY_ATTR_ETHERTYPE,	/* be16 Ethernet type */
+	OVS_KEY_ATTR_IPV4,      /* struct ovs_key_ipv4 */
+	OVS_KEY_ATTR_IPV6,      /* struct ovs_key_ipv6 */
+	OVS_KEY_ATTR_TCP,       /* struct ovs_key_tcp */
+	OVS_KEY_ATTR_UDP,       /* struct ovs_key_udp */
+	OVS_KEY_ATTR_ICMP,      /* struct ovs_key_icmp */
+	OVS_KEY_ATTR_ICMPV6,    /* struct ovs_key_icmpv6 */
+	OVS_KEY_ATTR_ARP,       /* struct ovs_key_arp */
+	OVS_KEY_ATTR_ND,        /* struct ovs_key_nd */
+	OVS_KEY_ATTR_SKB_MARK,  /* u32 skb mark */
+	OVS_KEY_ATTR_TUNNEL,    /* Nested set of ovs_tunnel attributes */
+	OVS_KEY_ATTR_SCTP,      /* struct ovs_key_sctp */
+	OVS_KEY_ATTR_TCP_FLAGS,	/* be16 TCP flags. */
+	OVS_KEY_ATTR_DP_HASH,      /* u32 hash value. Value 0 indicates the hash
+				   is not computed by the datapath. */
+	OVS_KEY_ATTR_RECIRC_ID, /* u32 recirc id */
+	OVS_KEY_ATTR_MPLS,      /* array of struct ovs_key_mpls.
+				 * The implementation may restrict
+				 * the accepted length of the array. */
+	OVS_KEY_ATTR_CT_STATE,	/* u32 bitmask of OVS_CS_F_* */
+	OVS_KEY_ATTR_CT_ZONE,	/* u16 connection tracking zone. */
+	OVS_KEY_ATTR_CT_MARK,	/* u32 connection tracking mark */
+	OVS_KEY_ATTR_CT_LABELS,	/* 16-octet connection tracking label */
+	OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4,   /* struct ovs_key_ct_tuple_ipv4 */
+	OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6,   /* struct ovs_key_ct_tuple_ipv6 */
+	OVS_KEY_ATTR_NSH,       /* Nested set of ovs_nsh_key_* */
+
+	__OVS_KEY_ATTR_MAX
+};
+
+#define OVS_KEY_ATTR_MAX (__OVS_KEY_ATTR_MAX - 1)
+
+enum ovs_tunnel_key_attr {
+	/* OVS_TUNNEL_KEY_ATTR_NONE, standard nl API requires this attribute! */
+	OVS_TUNNEL_KEY_ATTR_ID,                 /* be64 Tunnel ID */
+	OVS_TUNNEL_KEY_ATTR_IPV4_SRC,           /* be32 src IP address. */
+	OVS_TUNNEL_KEY_ATTR_IPV4_DST,           /* be32 dst IP address. */
+	OVS_TUNNEL_KEY_ATTR_TOS,                /* u8 Tunnel IP ToS. */
+	OVS_TUNNEL_KEY_ATTR_TTL,                /* u8 Tunnel IP TTL. */
+	OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT,      /* No argument, set DF. */
+	OVS_TUNNEL_KEY_ATTR_CSUM,               /* No argument. CSUM packet. */
+	OVS_TUNNEL_KEY_ATTR_OAM,                /* No argument. OAM frame.  */
+	OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS,        /* Array of Geneve options. */
+	OVS_TUNNEL_KEY_ATTR_TP_SRC,		/* be16 src Transport Port. */
+	OVS_TUNNEL_KEY_ATTR_TP_DST,		/* be16 dst Transport Port. */
+	OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS,		/* Nested OVS_VXLAN_EXT_* */
+	OVS_TUNNEL_KEY_ATTR_IPV6_SRC,		/* struct in6_addr src IPv6 address. */
+	OVS_TUNNEL_KEY_ATTR_IPV6_DST,		/* struct in6_addr dst IPv6 address. */
+	OVS_TUNNEL_KEY_ATTR_PAD,
+	OVS_TUNNEL_KEY_ATTR_ERSPAN_OPTS,	/* struct erspan_metadata */
+	OVS_TUNNEL_KEY_ATTR_IPV4_INFO_BRIDGE,	/* No argument. IPV4_INFO_BRIDGE mode.*/
+	__OVS_TUNNEL_KEY_ATTR_MAX
+};
+
+#define OVS_TUNNEL_KEY_ATTR_MAX (__OVS_TUNNEL_KEY_ATTR_MAX - 1)
+
+/**
+ * enum ovs_frag_type - IPv4 and IPv6 fragment type
+ * @OVS_FRAG_TYPE_NONE: Packet is not a fragment.
+ * @OVS_FRAG_TYPE_FIRST: Packet is a fragment with offset 0.
+ * @OVS_FRAG_TYPE_LATER: Packet is a fragment with nonzero offset.
+ *
+ * Used as the @ipv4_frag in &struct ovs_key_ipv4 and as @ipv6_frag &struct
+ * ovs_key_ipv6.
+ */
+enum ovs_frag_type {
+	OVS_FRAG_TYPE_NONE,
+	OVS_FRAG_TYPE_FIRST,
+	OVS_FRAG_TYPE_LATER,
+	__OVS_FRAG_TYPE_MAX
+};
+
+#define OVS_FRAG_TYPE_MAX (__OVS_FRAG_TYPE_MAX - 1)
+
+struct ovs_key_ethernet {
+	__u8	 eth_src[ETH_ALEN];
+	__u8	 eth_dst[ETH_ALEN];
+};
+
+struct ovs_key_mpls {
+	__be32 mpls_lse;
+};
+
+struct ovs_key_ipv4 {
+	__be32 ipv4_src;
+	__be32 ipv4_dst;
+	__u8   ipv4_proto;
+	__u8   ipv4_tos;
+	__u8   ipv4_ttl;
+	__u8   ipv4_frag;	/* One of OVS_FRAG_TYPE_*. */
+};
+
+struct ovs_key_ipv6 {
+	__be32 ipv6_src[4];
+	__be32 ipv6_dst[4];
+	__be32 ipv6_label;	/* 20-bits in least-significant bits. */
+	__u8   ipv6_proto;
+	__u8   ipv6_tclass;
+	__u8   ipv6_hlimit;
+	__u8   ipv6_frag;	/* One of OVS_FRAG_TYPE_*. */
+};
+
+struct ovs_key_tcp {
+	__be16 tcp_src;
+	__be16 tcp_dst;
+};
+
+struct ovs_key_udp {
+	__be16 udp_src;
+	__be16 udp_dst;
+};
+
+struct ovs_key_sctp {
+	__be16 sctp_src;
+	__be16 sctp_dst;
+};
+
+struct ovs_key_icmp {
+	__u8 icmp_type;
+	__u8 icmp_code;
+};
+
+struct ovs_key_icmpv6 {
+	__u8 icmpv6_type;
+	__u8 icmpv6_code;
+};
+
+struct ovs_key_arp {
+	__be32 arp_sip;
+	__be32 arp_tip;
+	__be16 arp_op;
+	__u8   arp_sha[ETH_ALEN];
+	__u8   arp_tha[ETH_ALEN];
+};
+
+struct ovs_key_nd {
+	__be32	nd_target[4];
+	__u8	nd_sll[ETH_ALEN];
+	__u8	nd_tll[ETH_ALEN];
+};
+
+#define OVS_CT_LABELS_LEN_32	4
+#define OVS_CT_LABELS_LEN	(OVS_CT_LABELS_LEN_32 * sizeof(__u32))
+struct ovs_key_ct_labels {
+	union {
+		__u8	ct_labels[OVS_CT_LABELS_LEN];
+		__u32	ct_labels_32[OVS_CT_LABELS_LEN_32];
+	};
+};
+
+/* OVS_KEY_ATTR_CT_STATE flags */
+#define OVS_CS_F_NEW               0x01 /* Beginning of a new connection. */
+#define OVS_CS_F_ESTABLISHED       0x02 /* Part of an existing connection. */
+#define OVS_CS_F_RELATED           0x04 /* Related to an established
+					 * connection. */
+#define OVS_CS_F_REPLY_DIR         0x08 /* Flow is in the reply direction. */
+#define OVS_CS_F_INVALID           0x10 /* Could not track connection. */
+#define OVS_CS_F_TRACKED           0x20 /* Conntrack has occurred. */
+#define OVS_CS_F_SRC_NAT           0x40 /* Packet's source address/port was
+					 * mangled by NAT.
+					 */
+#define OVS_CS_F_DST_NAT           0x80 /* Packet's destination address/port
+					 * was mangled by NAT.
+					 */
+
+#define OVS_CS_F_NAT_MASK (OVS_CS_F_SRC_NAT | OVS_CS_F_DST_NAT)
+
+struct ovs_key_ct_tuple_ipv4 {
+	__be32 ipv4_src;
+	__be32 ipv4_dst;
+	__be16 src_port;
+	__be16 dst_port;
+	__u8   ipv4_proto;
+};
+
+struct ovs_key_ct_tuple_ipv6 {
+	__be32 ipv6_src[4];
+	__be32 ipv6_dst[4];
+	__be16 src_port;
+	__be16 dst_port;
+	__u8   ipv6_proto;
+};
+
+enum ovs_nsh_key_attr {
+	OVS_NSH_KEY_ATTR_UNSPEC,
+	OVS_NSH_KEY_ATTR_BASE,  /* struct ovs_nsh_key_base. */
+	OVS_NSH_KEY_ATTR_MD1,   /* struct ovs_nsh_key_md1. */
+	OVS_NSH_KEY_ATTR_MD2,   /* variable-length octets for MD type 2. */
+	__OVS_NSH_KEY_ATTR_MAX
+};
+
+#define OVS_NSH_KEY_ATTR_MAX (__OVS_NSH_KEY_ATTR_MAX - 1)
+
+struct ovs_nsh_key_base {
+	__u8 flags;
+	__u8 ttl;
+	__u8 mdtype;
+	__u8 np;
+	__be32 path_hdr;
+};
+
+#define NSH_MD1_CONTEXT_SIZE 4
+
+struct ovs_nsh_key_md1 {
+	__be32 context[NSH_MD1_CONTEXT_SIZE];
+};
+
+/**
+ * enum ovs_flow_attr - attributes for %OVS_FLOW_* commands.
+ * @OVS_FLOW_ATTR_KEY: Nested %OVS_KEY_ATTR_* attributes specifying the flow
+ * key.  Always present in notifications.  Required for all requests (except
+ * dumps).
+ * @OVS_FLOW_ATTR_ACTIONS: Nested %OVS_ACTION_ATTR_* attributes specifying
+ * the actions to take for packets that match the key.  Always present in
+ * notifications.  Required for %OVS_FLOW_CMD_NEW requests, optional for
+ * %OVS_FLOW_CMD_SET requests.  An %OVS_FLOW_CMD_SET without
+ * %OVS_FLOW_ATTR_ACTIONS will not modify the actions.  To clear the actions,
+ * an %OVS_FLOW_ATTR_ACTIONS without any nested attributes must be given.
+ * @OVS_FLOW_ATTR_STATS: &struct ovs_flow_stats giving statistics for this
+ * flow.  Present in notifications if the stats would be nonzero.  Ignored in
+ * requests.
+ * @OVS_FLOW_ATTR_TCP_FLAGS: An 8-bit value giving the OR'd value of all of the
+ * TCP flags seen on packets in this flow.  Only present in notifications for
+ * TCP flows, and only if it would be nonzero.  Ignored in requests.
+ * @OVS_FLOW_ATTR_USED: A 64-bit integer giving the time, in milliseconds on
+ * the system monotonic clock, at which a packet was last processed for this
+ * flow.  Only present in notifications if a packet has been processed for this
+ * flow.  Ignored in requests.
+ * @OVS_FLOW_ATTR_CLEAR: If present in a %OVS_FLOW_CMD_SET request, clears the
+ * last-used time, accumulated TCP flags, and statistics for this flow.
+ * Otherwise ignored in requests.  Never present in notifications.
+ * @OVS_FLOW_ATTR_MASK: Nested %OVS_KEY_ATTR_* attributes specifying the
+ * mask bits for wildcarded flow match. Mask bit value '1' specifies exact
+ * match with corresponding flow key bit, while mask bit value '0' specifies
+ * a wildcarded match. Omitting attribute is treated as wildcarding all
+ * corresponding fields. Optional for all requests. If not present,
+ * all flow key bits are exact match bits.
+ * @OVS_FLOW_ATTR_UFID: A value between 1-16 octets specifying a unique
+ * identifier for the flow. Causes the flow to be indexed by this value rather
+ * than the value of the %OVS_FLOW_ATTR_KEY attribute. Optional for all
+ * requests. Present in notifications if the flow was created with this
+ * attribute.
+ * @OVS_FLOW_ATTR_UFID_FLAGS: A 32-bit value of OR'd %OVS_UFID_F_*
+ * flags that provide alternative semantics for flow installation and
+ * retrieval. Optional for all requests.
+ *
+ * These attributes follow the &struct ovs_header within the Generic Netlink
+ * payload for %OVS_FLOW_* commands.
+ */
+enum ovs_flow_attr {
+	OVS_FLOW_ATTR_UNSPEC,
+	OVS_FLOW_ATTR_KEY,       /* Sequence of OVS_KEY_ATTR_* attributes. */
+	OVS_FLOW_ATTR_ACTIONS,   /* Nested OVS_ACTION_ATTR_* attributes. */
+	OVS_FLOW_ATTR_STATS,     /* struct ovs_flow_stats. */
+	OVS_FLOW_ATTR_TCP_FLAGS, /* 8-bit OR'd TCP flags. */
+	OVS_FLOW_ATTR_USED,      /* u64 msecs last used in monotonic time. */
+	OVS_FLOW_ATTR_CLEAR,     /* Flag to clear stats, tcp_flags, used. */
+	OVS_FLOW_ATTR_MASK,      /* Sequence of OVS_KEY_ATTR_* attributes. */
+	OVS_FLOW_ATTR_PROBE,     /* Flow operation is a feature probe, error
+				  * logging should be suppressed. */
+	OVS_FLOW_ATTR_UFID,      /* Variable length unique flow identifier. */
+	OVS_FLOW_ATTR_UFID_FLAGS,/* u32 of OVS_UFID_F_*. */
+	OVS_FLOW_ATTR_PAD,
+	__OVS_FLOW_ATTR_MAX
+};
+
+#define OVS_FLOW_ATTR_MAX (__OVS_FLOW_ATTR_MAX - 1)
+
+/**
+ * Omit attributes for notifications.
+ *
+ * If a datapath request contains an %OVS_UFID_F_OMIT_* flag, then the datapath
+ * may omit the corresponding %OVS_FLOW_ATTR_* from the response.
+ */
+#define OVS_UFID_F_OMIT_KEY      (1 << 0)
+#define OVS_UFID_F_OMIT_MASK     (1 << 1)
+#define OVS_UFID_F_OMIT_ACTIONS  (1 << 2)
+
+/**
+ * enum ovs_sample_attr - Attributes for %OVS_ACTION_ATTR_SAMPLE action.
+ * @OVS_SAMPLE_ATTR_PROBABILITY: 32-bit fraction of packets to sample with
+ * @OVS_ACTION_ATTR_SAMPLE.  A value of 0 samples no packets, a value of
+ * %UINT32_MAX samples all packets and intermediate values sample intermediate
+ * fractions of packets.
+ * @OVS_SAMPLE_ATTR_ACTIONS: Set of actions to execute in sampling event.
+ * Actions are passed as nested attributes.
+ *
+ * Executes the specified actions with the given probability on a per-packet
+ * basis.
+ */
+enum ovs_sample_attr {
+	OVS_SAMPLE_ATTR_UNSPEC,
+	OVS_SAMPLE_ATTR_PROBABILITY, /* u32 number */
+	OVS_SAMPLE_ATTR_ACTIONS,     /* Nested OVS_ACTION_ATTR_* attributes. */
+	__OVS_SAMPLE_ATTR_MAX,
+
+};
+
+#define OVS_SAMPLE_ATTR_MAX (__OVS_SAMPLE_ATTR_MAX - 1)
+
+
+/**
+ * enum ovs_userspace_attr - Attributes for %OVS_ACTION_ATTR_USERSPACE action.
+ * @OVS_USERSPACE_ATTR_PID: u32 Netlink PID to which the %OVS_PACKET_CMD_ACTION
+ * message should be sent.  Required.
+ * @OVS_USERSPACE_ATTR_USERDATA: If present, its variable-length argument is
+ * copied to the %OVS_PACKET_CMD_ACTION message as %OVS_PACKET_ATTR_USERDATA.
+ * @OVS_USERSPACE_ATTR_EGRESS_TUN_PORT: If present, u32 output port to get
+ * tunnel info.
+ * @OVS_USERSPACE_ATTR_ACTIONS: If present, send actions with upcall.
+ */
+enum ovs_userspace_attr {
+	OVS_USERSPACE_ATTR_UNSPEC,
+	OVS_USERSPACE_ATTR_PID,	      /* u32 Netlink PID to receive upcalls. */
+	OVS_USERSPACE_ATTR_USERDATA,  /* Optional user-specified cookie. */
+	OVS_USERSPACE_ATTR_EGRESS_TUN_PORT,  /* Optional, u32 output port
+					      * to get tunnel info. */
+	OVS_USERSPACE_ATTR_ACTIONS,   /* Optional flag to get actions. */
+	__OVS_USERSPACE_ATTR_MAX
+};
+
+#define OVS_USERSPACE_ATTR_MAX (__OVS_USERSPACE_ATTR_MAX - 1)
+
+struct ovs_action_trunc {
+	__u32 max_len; /* Max packet size in bytes. */
+};
+
+/**
+ * struct ovs_action_push_mpls - %OVS_ACTION_ATTR_PUSH_MPLS action argument.
+ * @mpls_lse: MPLS label stack entry to push.
+ * @mpls_ethertype: Ethertype to set in the encapsulating ethernet frame.
+ *
+ * The only values @mpls_ethertype should ever be given are %ETH_P_MPLS_UC and
+ * %ETH_P_MPLS_MC, indicating MPLS unicast or multicast. Other are rejected.
+ */
+struct ovs_action_push_mpls {
+	__be32 mpls_lse;
+	__be16 mpls_ethertype; /* Either %ETH_P_MPLS_UC or %ETH_P_MPLS_MC */
+};
+
+/**
+ * struct ovs_action_add_mpls - %OVS_ACTION_ATTR_ADD_MPLS action
+ * argument.
+ * @mpls_lse: MPLS label stack entry to push.
+ * @mpls_ethertype: Ethertype to set in the encapsulating ethernet frame.
+ * @tun_flags: MPLS tunnel attributes.
+ *
+ * The only values @mpls_ethertype should ever be given are %ETH_P_MPLS_UC and
+ * %ETH_P_MPLS_MC, indicating MPLS unicast or multicast. Other are rejected.
+ */
+struct ovs_action_add_mpls {
+	__be32 mpls_lse;
+	__be16 mpls_ethertype; /* Either %ETH_P_MPLS_UC or %ETH_P_MPLS_MC */
+	__u16 tun_flags;
+};
+
+#define OVS_MPLS_L3_TUNNEL_FLAG_MASK  (1 << 0) /* Flag to specify the place of
+						* insertion of MPLS header.
+						* When false, the MPLS header
+						* will be inserted at the start
+						* of the packet.
+						* When true, the MPLS header
+						* will be inserted at the start
+						* of the l3 header.
+						*/
+
+/**
+ * struct ovs_action_push_vlan - %OVS_ACTION_ATTR_PUSH_VLAN action argument.
+ * @vlan_tpid: Tag protocol identifier (TPID) to push.
+ * @vlan_tci: Tag control identifier (TCI) to push.  The CFI bit must be set
+ * (but it will not be set in the 802.1Q header that is pushed).
+ *
+ * The @vlan_tpid value is typically %ETH_P_8021Q or %ETH_P_8021AD.
+ * The only acceptable TPID values are those that the kernel module also parses
+ * as 802.1Q or 802.1AD headers, to prevent %OVS_ACTION_ATTR_PUSH_VLAN followed
+ * by %OVS_ACTION_ATTR_POP_VLAN from having surprising results.
+ */
+struct ovs_action_push_vlan {
+	__be16 vlan_tpid;	/* 802.1Q or 802.1ad TPID. */
+	__be16 vlan_tci;	/* 802.1Q TCI (VLAN ID and priority). */
+};
+
+/* Data path hash algorithm for computing Datapath hash.
+ *
+ * The algorithm type only specifies the fields in a flow
+ * will be used as part of the hash. Each datapath is free
+ * to use its own hash algorithm. The hash value will be
+ * opaque to the user space daemon.
+ */
+enum ovs_hash_alg {
+	OVS_HASH_ALG_L4,
+};
+
+/*
+ * struct ovs_action_hash - %OVS_ACTION_ATTR_HASH action argument.
+ * @hash_alg: Algorithm used to compute hash prior to recirculation.
+ * @hash_basis: basis used for computing hash.
+ */
+struct ovs_action_hash {
+	__u32  hash_alg;     /* One of ovs_hash_alg. */
+	__u32  hash_basis;
+};
+
+/**
+ * enum ovs_ct_attr - Attributes for %OVS_ACTION_ATTR_CT action.
+ * @OVS_CT_ATTR_COMMIT: If present, commits the connection to the conntrack
+ * table. This allows future packets for the same connection to be identified
+ * as 'established' or 'related'. The flow key for the current packet will
+ * retain the pre-commit connection state.
+ * @OVS_CT_ATTR_ZONE: u16 connection tracking zone.
+ * @OVS_CT_ATTR_MARK: u32 value followed by u32 mask. For each bit set in the
+ * mask, the corresponding bit in the value is copied to the connection
+ * tracking mark field in the connection.
+ * @OVS_CT_ATTR_LABELS: %OVS_CT_LABELS_LEN value followed by %OVS_CT_LABELS_LEN
+ * mask. For each bit set in the mask, the corresponding bit in the value is
+ * copied to the connection tracking label field in the connection.
+ * @OVS_CT_ATTR_HELPER: variable length string defining conntrack ALG.
+ * @OVS_CT_ATTR_NAT: Nested OVS_NAT_ATTR_* for performing L3 network address
+ * translation (NAT) on the packet.
+ * @OVS_CT_ATTR_FORCE_COMMIT: Like %OVS_CT_ATTR_COMMIT, but instead of doing
+ * nothing if the connection is already committed will check that the current
+ * packet is in conntrack entry's original direction.  If directionality does
+ * not match, will delete the existing conntrack entry and commit a new one.
+ * @OVS_CT_ATTR_EVENTMASK: Mask of bits indicating which conntrack event types
+ * (enum ip_conntrack_events IPCT_*) should be reported.  For any bit set to
+ * zero, the corresponding event type is not generated.  Default behavior
+ * depends on system configuration, but typically all event types are
+ * generated, hence listening on NFNLGRP_CONNTRACK_UPDATE events may get a lot
+ * of events.  Explicitly passing this attribute allows limiting the updates
+ * received to the events of interest.  The bit 1 << IPCT_NEW, 1 <<
+ * IPCT_RELATED, and 1 << IPCT_DESTROY must be set to ones for those events to
+ * be received on NFNLGRP_CONNTRACK_NEW and NFNLGRP_CONNTRACK_DESTROY groups,
+ * respectively.  Remaining bits control the changes for which an event is
+ * delivered on the NFNLGRP_CONNTRACK_UPDATE group.
+ * @OVS_CT_ATTR_TIMEOUT: Variable length string defining conntrack timeout.
+ */
+enum ovs_ct_attr {
+	OVS_CT_ATTR_UNSPEC,
+	OVS_CT_ATTR_COMMIT,     /* No argument, commits connection. */
+	OVS_CT_ATTR_ZONE,       /* u16 zone id. */
+	OVS_CT_ATTR_MARK,       /* mark to associate with this connection. */
+	OVS_CT_ATTR_LABELS,     /* labels to associate with this connection. */
+	OVS_CT_ATTR_HELPER,     /* netlink helper to assist detection of
+				   related connections. */
+	OVS_CT_ATTR_NAT,        /* Nested OVS_NAT_ATTR_* */
+	OVS_CT_ATTR_FORCE_COMMIT,  /* No argument */
+	OVS_CT_ATTR_EVENTMASK,  /* u32 mask of IPCT_* events. */
+	OVS_CT_ATTR_TIMEOUT,	/* Associate timeout with this connection for
+				 * fine-grain timeout tuning. */
+	__OVS_CT_ATTR_MAX
+};
+
+#define OVS_CT_ATTR_MAX (__OVS_CT_ATTR_MAX - 1)
+
+/**
+ * enum ovs_nat_attr - Attributes for %OVS_CT_ATTR_NAT.
+ *
+ * @OVS_NAT_ATTR_SRC: Flag for Source NAT (mangle source address/port).
+ * @OVS_NAT_ATTR_DST: Flag for Destination NAT (mangle destination
+ * address/port).  Only one of (@OVS_NAT_ATTR_SRC, @OVS_NAT_ATTR_DST) may be
+ * specified.  Effective only for packets for ct_state NEW connections.
+ * Packets of committed connections are mangled by the NAT action according to
+ * the committed NAT type regardless of the flags specified.  As a corollary, a
+ * NAT action without a NAT type flag will only mangle packets of committed
+ * connections.  The following NAT attributes only apply for NEW
+ * (non-committed) connections, and they may be included only when the CT
+ * action has the @OVS_CT_ATTR_COMMIT flag and either @OVS_NAT_ATTR_SRC or
+ * @OVS_NAT_ATTR_DST is also included.
+ * @OVS_NAT_ATTR_IP_MIN: struct in_addr or struct in6_addr
+ * @OVS_NAT_ATTR_IP_MAX: struct in_addr or struct in6_addr
+ * @OVS_NAT_ATTR_PROTO_MIN: u16 L4 protocol specific lower boundary (port)
+ * @OVS_NAT_ATTR_PROTO_MAX: u16 L4 protocol specific upper boundary (port)
+ * @OVS_NAT_ATTR_PERSISTENT: Flag for persistent IP mapping across reboots
+ * @OVS_NAT_ATTR_PROTO_HASH: Flag for pseudo random L4 port mapping (MD5)
+ * @OVS_NAT_ATTR_PROTO_RANDOM: Flag for fully randomized L4 port mapping
+ */
+enum ovs_nat_attr {
+	OVS_NAT_ATTR_UNSPEC,
+	OVS_NAT_ATTR_SRC,
+	OVS_NAT_ATTR_DST,
+	OVS_NAT_ATTR_IP_MIN,
+	OVS_NAT_ATTR_IP_MAX,
+	OVS_NAT_ATTR_PROTO_MIN,
+	OVS_NAT_ATTR_PROTO_MAX,
+	OVS_NAT_ATTR_PERSISTENT,
+	OVS_NAT_ATTR_PROTO_HASH,
+	OVS_NAT_ATTR_PROTO_RANDOM,
+	__OVS_NAT_ATTR_MAX,
+};
+
+#define OVS_NAT_ATTR_MAX (__OVS_NAT_ATTR_MAX - 1)
+
+/*
+ * struct ovs_action_push_eth - %OVS_ACTION_ATTR_PUSH_ETH action argument.
+ * @addresses: Source and destination MAC addresses.
+ * @eth_type: Ethernet type
+ */
+struct ovs_action_push_eth {
+	struct ovs_key_ethernet addresses;
+};
+
+/*
+ * enum ovs_check_pkt_len_attr - Attributes for %OVS_ACTION_ATTR_CHECK_PKT_LEN.
+ *
+ * @OVS_CHECK_PKT_LEN_ATTR_PKT_LEN: u16 Packet length to check for.
+ * @OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_GREATER: Nested OVS_ACTION_ATTR_*
+ * actions to apply if the packer length is greater than the specified
+ * length in the attr - OVS_CHECK_PKT_LEN_ATTR_PKT_LEN.
+ * @OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_LESS_EQUAL - Nested OVS_ACTION_ATTR_*
+ * actions to apply if the packer length is lesser or equal to the specified
+ * length in the attr - OVS_CHECK_PKT_LEN_ATTR_PKT_LEN.
+ */
+enum ovs_check_pkt_len_attr {
+	OVS_CHECK_PKT_LEN_ATTR_UNSPEC,
+	OVS_CHECK_PKT_LEN_ATTR_PKT_LEN,
+	OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_GREATER,
+	OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_LESS_EQUAL,
+	__OVS_CHECK_PKT_LEN_ATTR_MAX,
+
+};
+
+#define OVS_CHECK_PKT_LEN_ATTR_MAX (__OVS_CHECK_PKT_LEN_ATTR_MAX - 1)
+
+
+/**
+ * enum ovs_action_attr - Action types.
+ *
+ * @OVS_ACTION_ATTR_OUTPUT: Output packet to port.
+ * @OVS_ACTION_ATTR_TRUNC: Output packet to port with truncated packet size.
+ * @OVS_ACTION_ATTR_USERSPACE: Send packet to userspace according to nested
+ * %OVS_USERSPACE_ATTR_* attributes.
+ * @OVS_ACTION_ATTR_SET: Replaces the contents of an existing header.  The
+ * single nested %OVS_KEY_ATTR_* attribute specifies a header to modify and its
+ * value.
+ * @OVS_ACTION_ATTR_SET_MASKED: Replaces the contents of an existing header.  A
+ * nested %OVS_KEY_ATTR_* attribute specifies a header to modify, its value,
+ * and a mask.  For every bit set in the mask, the corresponding bit value
+ * is copied from the value to the packet header field, rest of the bits are
+ * left unchanged.  The non-masked value bits must be passed in as zeroes.
+ * Masking is not supported for the %OVS_KEY_ATTR_TUNNEL attribute.
+ * @OVS_ACTION_ATTR_PUSH_VLAN: Push a new outermost 802.1Q or 802.1ad header
+ * onto the packet.
+ * @OVS_ACTION_ATTR_POP_VLAN: Pop the outermost 802.1Q or 802.1ad header
+ * from the packet.
+ * @OVS_ACTION_ATTR_SAMPLE: Probabilitically executes actions, as specified in
+ * the nested %OVS_SAMPLE_ATTR_* attributes.
+ * @OVS_ACTION_ATTR_PUSH_MPLS: Push a new MPLS label stack entry onto the
+ * top of the packets MPLS label stack.  Set the ethertype of the
+ * encapsulating frame to either %ETH_P_MPLS_UC or %ETH_P_MPLS_MC to
+ * indicate the new packet contents.
+ * @OVS_ACTION_ATTR_POP_MPLS: Pop an MPLS label stack entry off of the
+ * packet's MPLS label stack.  Set the encapsulating frame's ethertype to
+ * indicate the new packet contents. This could potentially still be
+ * %ETH_P_MPLS if the resulting MPLS label stack is not empty.  If there
+ * is no MPLS label stack, as determined by ethertype, no action is taken.
+ * @OVS_ACTION_ATTR_CT: Track the connection. Populate the conntrack-related
+ * entries in the flow key.
+ * @OVS_ACTION_ATTR_PUSH_ETH: Push a new outermost Ethernet header onto the
+ * packet.
+ * @OVS_ACTION_ATTR_POP_ETH: Pop the outermost Ethernet header off the
+ * packet.
+ * @OVS_ACTION_ATTR_CT_CLEAR: Clear conntrack state from the packet.
+ * @OVS_ACTION_ATTR_PUSH_NSH: push NSH header to the packet.
+ * @OVS_ACTION_ATTR_POP_NSH: pop the outermost NSH header off the packet.
+ * @OVS_ACTION_ATTR_METER: Run packet through a meter, which may drop the
+ * packet, or modify the packet (e.g., change the DSCP field).
+ * @OVS_ACTION_ATTR_CLONE: make a copy of the packet and execute a list of
+ * actions without affecting the original packet and key.
+ * @OVS_ACTION_ATTR_CHECK_PKT_LEN: Check the packet length and execute a set
+ * of actions if greater than the specified packet length, else execute
+ * another set of actions.
+ * @OVS_ACTION_ATTR_ADD_MPLS: Push a new MPLS label stack entry at the
+ * start of the packet or at the start of the l3 header depending on the value
+ * of l3 tunnel flag in the tun_flags field of OVS_ACTION_ATTR_ADD_MPLS
+ * argument.
+ *
+ * Only a single header can be set with a single %OVS_ACTION_ATTR_SET.  Not all
+ * fields within a header are modifiable, e.g. the IPv4 protocol and fragment
+ * type may not be changed.
+ *
+ * @OVS_ACTION_ATTR_SET_TO_MASKED: Kernel internal masked set action translated
+ * from the @OVS_ACTION_ATTR_SET.
+ */
+
+enum ovs_action_attr {
+	OVS_ACTION_ATTR_UNSPEC,
+	OVS_ACTION_ATTR_OUTPUT,	      /* u32 port number. */
+	OVS_ACTION_ATTR_USERSPACE,    /* Nested OVS_USERSPACE_ATTR_*. */
+	OVS_ACTION_ATTR_SET,          /* One nested OVS_KEY_ATTR_*. */
+	OVS_ACTION_ATTR_PUSH_VLAN,    /* struct ovs_action_push_vlan. */
+	OVS_ACTION_ATTR_POP_VLAN,     /* No argument. */
+	OVS_ACTION_ATTR_SAMPLE,       /* Nested OVS_SAMPLE_ATTR_*. */
+	OVS_ACTION_ATTR_RECIRC,       /* u32 recirc_id. */
+	OVS_ACTION_ATTR_HASH,	      /* struct ovs_action_hash. */
+	OVS_ACTION_ATTR_PUSH_MPLS,    /* struct ovs_action_push_mpls. */
+	OVS_ACTION_ATTR_POP_MPLS,     /* __be16 ethertype. */
+	OVS_ACTION_ATTR_SET_MASKED,   /* One nested OVS_KEY_ATTR_* including
+				       * data immediately followed by a mask.
+				       * The data must be zero for the unmasked
+				       * bits. */
+	OVS_ACTION_ATTR_CT,           /* Nested OVS_CT_ATTR_* . */
+	OVS_ACTION_ATTR_TRUNC,        /* u32 struct ovs_action_trunc. */
+	OVS_ACTION_ATTR_PUSH_ETH,     /* struct ovs_action_push_eth. */
+	OVS_ACTION_ATTR_POP_ETH,      /* No argument. */
+	OVS_ACTION_ATTR_CT_CLEAR,     /* No argument. */
+	OVS_ACTION_ATTR_PUSH_NSH,     /* Nested OVS_NSH_KEY_ATTR_*. */
+	OVS_ACTION_ATTR_POP_NSH,      /* No argument. */
+	OVS_ACTION_ATTR_METER,        /* u32 meter ID. */
+	OVS_ACTION_ATTR_CLONE,        /* Nested OVS_CLONE_ATTR_*.  */
+	OVS_ACTION_ATTR_CHECK_PKT_LEN, /* Nested OVS_CHECK_PKT_LEN_ATTR_*. */
+	OVS_ACTION_ATTR_ADD_MPLS,     /* struct ovs_action_add_mpls. */
+	OVS_ACTION_ATTR_DEC_TTL,      /* Nested OVS_DEC_TTL_ATTR_*. */
+
+	__OVS_ACTION_ATTR_MAX,	      /* Nothing past this will be accepted
+				       * from userspace. */
+
+};
+
+#define OVS_ACTION_ATTR_MAX (__OVS_ACTION_ATTR_MAX - 1)
+
+/* Meters. */
+#define OVS_METER_FAMILY  "ovs_meter"
+#define OVS_METER_MCGROUP "ovs_meter"
+#define OVS_METER_VERSION 0x1
+
+enum ovs_meter_cmd {
+	OVS_METER_CMD_UNSPEC,
+	OVS_METER_CMD_FEATURES,	/* Get features supported by the datapath. */
+	OVS_METER_CMD_SET,	/* Add or modify a meter. */
+	OVS_METER_CMD_DEL,	/* Delete a meter. */
+	OVS_METER_CMD_GET	/* Get meter stats. */
+};
+
+enum ovs_meter_attr {
+	OVS_METER_ATTR_UNSPEC,
+	OVS_METER_ATTR_ID,	/* u32 meter ID within datapath. */
+	OVS_METER_ATTR_KBPS,	/* No argument. If set, units in kilobits
+				 * per second. Otherwise, units in
+				 * packets per second.
+				 */
+	OVS_METER_ATTR_STATS,	/* struct ovs_flow_stats for the meter. */
+	OVS_METER_ATTR_BANDS,	/* Nested attributes for meter bands. */
+	OVS_METER_ATTR_USED,	/* u64 msecs last used in monotonic time. */
+	OVS_METER_ATTR_CLEAR,	/* Flag to clear stats, used. */
+	OVS_METER_ATTR_MAX_METERS, /* u32 number of meters supported. */
+	OVS_METER_ATTR_MAX_BANDS,  /* u32 max number of bands per meter. */
+	OVS_METER_ATTR_PAD,
+	__OVS_METER_ATTR_MAX
+};
+
+#define OVS_METER_ATTR_MAX (__OVS_METER_ATTR_MAX - 1)
+
+enum ovs_band_attr {
+	OVS_BAND_ATTR_UNSPEC,
+	OVS_BAND_ATTR_TYPE,	/* u32 OVS_METER_BAND_TYPE_* constant. */
+	OVS_BAND_ATTR_RATE,	/* u32 band rate in meter units (see above). */
+	OVS_BAND_ATTR_BURST,	/* u32 burst size in meter units. */
+	OVS_BAND_ATTR_STATS,	/* struct ovs_flow_stats for the band. */
+	__OVS_BAND_ATTR_MAX
+};
+
+#define OVS_BAND_ATTR_MAX (__OVS_BAND_ATTR_MAX - 1)
+
+enum ovs_meter_band_type {
+	OVS_METER_BAND_TYPE_UNSPEC,
+	OVS_METER_BAND_TYPE_DROP,   /* Drop exceeding packets. */
+	__OVS_METER_BAND_TYPE_MAX
+};
+
+#define OVS_METER_BAND_TYPE_MAX (__OVS_METER_BAND_TYPE_MAX - 1)
+
+/* Conntrack limit */
+#define OVS_CT_LIMIT_FAMILY  "ovs_ct_limit"
+#define OVS_CT_LIMIT_MCGROUP "ovs_ct_limit"
+#define OVS_CT_LIMIT_VERSION 0x1
+
+enum ovs_ct_limit_cmd {
+	OVS_CT_LIMIT_CMD_UNSPEC,
+	OVS_CT_LIMIT_CMD_SET,		/* Add or modify ct limit. */
+	OVS_CT_LIMIT_CMD_DEL,		/* Delete ct limit. */
+	OVS_CT_LIMIT_CMD_GET		/* Get ct limit. */
+};
+
+enum ovs_ct_limit_attr {
+	OVS_CT_LIMIT_ATTR_UNSPEC,
+	OVS_CT_LIMIT_ATTR_ZONE_LIMIT,	/* Nested struct ovs_zone_limit. */
+	__OVS_CT_LIMIT_ATTR_MAX
+};
+
+#define OVS_CT_LIMIT_ATTR_MAX (__OVS_CT_LIMIT_ATTR_MAX - 1)
+
+#define OVS_ZONE_LIMIT_DEFAULT_ZONE -1
+
+struct ovs_zone_limit {
+	int zone_id;
+	__u32 limit;
+	__u32 count;
+};
+
+enum ovs_dec_ttl_attr {
+	OVS_DEC_TTL_ATTR_UNSPEC,
+	OVS_DEC_TTL_ATTR_ACTION,	/* Nested struct nlattr */
+	__OVS_DEC_TTL_ATTR_MAX
+};
+
+#endif /* _LINUX_OPENVSWITCH_H */