path: root/contrib/libs/linux-headers/linux/openvswitch.h

/* 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 */