Quelle openvswitch.h Sprache: C

/* 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 _UAPI__LINUX_OPENVSWITCH_H
#define _UAPI__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_PER_CPU_PIDS: Per-cpu array of PIDs for upcalls when
* OVS_DP_F_DISPATCH_UPCALL_PER_CPU feature is set.
* @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.
* @OVS_DP_ATTR_IFINDEX: Interface index for a new datapath netdev. Only
* valid for %OVS_DP_CMD_NEW requests.
*
* 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_MASKS_CACHE_SIZE,
OVS_DP_ATTR_PER_CPU_PIDS,   /* Netlink PIDS to receive upcalls in
     * per-cpu dispatch mode
     */
OVS_DP_ATTR_IFINDEX,
__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 n_cache_hit;       /* Number of cache matches for flow lookups. */
__u64 pad1;   /* 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)

/* Allow per-cpu dispatch of upcalls */
#define OVS_DP_F_DISPATCH_UPCALL_PER_CPU (1 << 3)

/* 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).
* @OVS_PACKET_ATTR_UPCALL_PID: Netlink PID to use for upcalls while
* processing %OVS_PACKET_CMD_EXECUTE.  Takes precedence over all other ways
* to determine the Netlink PID including %OVS_USERSPACE_ATTR_PID,
* %OVS_DP_ATTR_UPCALL_PID, %OVS_DP_ATTR_PER_CPU_PIDS and the
* %OVS_VPORT_ATTR_UPCALL_PID.
*
* 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_UPCALL_PID, /* u32 Netlink PID. */
__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_UPCALL_STATS,
__OVS_VPORT_ATTR_MAX
};

#define OVS_VPORT_ATTR_MAX (__OVS_VPORT_ATTR_MAX - 1)

/**
* enum ovs_vport_upcall_attr - attributes for %OVS_VPORT_UPCALL* commands
* @OVS_VPORT_UPCALL_SUCCESS: 64-bit upcall success packets.
* @OVS_VPORT_UPCALL_FAIL: 64-bit upcall fail packets.
*/
enum ovs_vport_upcall_attr {
OVS_VPORT_UPCALL_ATTR_SUCCESS,
OVS_VPORT_UPCALL_ATTR_FAIL,
__OVS_VPORT_UPCALL_ATTR_MAX
};

#define OVS_VPORT_UPCALL_ATTR_MAX (__OVS_VPORT_UPCALL_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_* */

/* User space decided to squat on types 29 and 30.  They are defined
* below, but should not be sent to the kernel.
*
* WARNING: No new types should be added unless they are defined
*          for both kernel and user space (no 'ifdef's).  It's hard
*          to keep compatibility otherwise.
*/
OVS_KEY_ATTR_PACKET_TYPE,   /* be32 packet type */
OVS_KEY_ATTR_ND_EXTENSIONS, /* IPv6 Neighbor Discovery extensions */

OVS_KEY_ATTR_TUNNEL_INFO,   /* struct ip_tunnel_info.
     * For in-kernel use only.
     */
OVS_KEY_ATTR_IPV6_EXTHDRS,  /* struct ovs_key_ipv6_exthdr */
__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_*. */
};

/* separate structure to support backward compatibility with older user space */
struct ovs_key_ipv6_exthdrs {
__u16  hdrs;
};

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. Nested actions will be able to access the probability value of the
* parent @OVS_ACTION_ATTR_SAMPLE.
*/
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,

#ifdef __KERNEL__
OVS_SAMPLE_ATTR_ARG          /* struct sample_arg  */
#endif
};

#define OVS_SAMPLE_ATTR_MAX (__OVS_SAMPLE_ATTR_MAX - 1)

#ifdef __KERNEL__
struct sample_arg {
bool exec;                   /* When true, actions in sample will not
      * change flow keys. False otherwise.
      */
u32  probability;            /* Same value as
      * 'OVS_SAMPLE_ATTR_PROBABILITY'.
      */
};
#endif

/**
* 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,
OVS_HASH_ALG_SYM_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,

#ifdef __KERNEL__
OVS_CHECK_PKT_LEN_ATTR_ARG          /* struct check_pkt_len_arg  */
#endif
};

#define OVS_CHECK_PKT_LEN_ATTR_MAX (__OVS_CHECK_PKT_LEN_ATTR_MAX - 1)

#ifdef __KERNEL__
struct check_pkt_len_arg {
u16 pkt_len; /* Same value as OVS_CHECK_PKT_LEN_ATTR_PKT_LEN'. */
bool exec_for_greater; /* When true, actions in IF_GREATER will
* not change flow keys. False otherwise.
*/
bool exec_for_lesser_equal; /* When true, actions in IF_LESS_EQUAL
     * will not change flow keys. False
     * otherwise.
     */
};
#endif

#define OVS_PSAMPLE_COOKIE_MAX_SIZE 16
/**
* enum ovs_psample_attr - Attributes for %OVS_ACTION_ATTR_PSAMPLE
* action.
*
* @OVS_PSAMPLE_ATTR_GROUP: 32-bit number to identify the source of the
* sample.
* @OVS_PSAMPLE_ATTR_COOKIE: An optional variable-length binary cookie that
* contains user-defined metadata. The maximum length is
* OVS_PSAMPLE_COOKIE_MAX_SIZE bytes.
*
* Sends the packet to the psample multicast group with the specified group and
* cookie. It is possible to combine this action with the
* %OVS_ACTION_ATTR_TRUNC action to limit the size of the sample.
*/
enum ovs_psample_attr {
OVS_PSAMPLE_ATTR_GROUP = 1, /* u32 number. */
OVS_PSAMPLE_ATTR_COOKIE, /* Optional, user specified cookie. */

/* private: */
__OVS_PSAMPLE_ATTR_MAX
};

#define OVS_PSAMPLE_ATTR_MAX (__OVS_PSAMPLE_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.
* @OVS_ACTION_ATTR_DROP: Explicit drop action.
* @OVS_ACTION_ATTR_PSAMPLE: Send a sample of the packet to external observers
* via psample.
*
* 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_DROP,         /* u32 error code. */
OVS_ACTION_ATTR_PSAMPLE,      /* Nested OVS_PSAMPLE_ATTR_*. */

__OVS_ACTION_ATTR_MAX,       /* Nothing past this will be accepted
       * from userspace. */

#ifdef __KERNEL__
OVS_ACTION_ATTR_SET_TO_MASKED, /* Kernel module internal masked
* set action converted from
* OVS_ACTION_ATTR_SET. */
#endif
};

#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
};

#define OVS_DEC_TTL_ATTR_MAX (__OVS_DEC_TTL_ATTR_MAX - 1)

#endif /* _LINUX_OPENVSWITCH_H */

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