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     ˆÊÉ„hO?ÀÁÆ ?÷     /* 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 o