1/* SPDX-License-Identifier: GPL-2.0-only */
 2/*
 3 * Copyright (c) 2017 Nicira, Inc.
 4 */
 5
 6#ifndef METER_H
 7#define METER_H 1
 8
 9#include <linux/init.h>
10#include <linux/module.h>
11#include <linux/kernel.h>
12#include <linux/netlink.h>
13#include <linux/openvswitch.h>
14#include <linux/skbuff.h>
15#include <linux/bits.h>
16
17#include "flow.h"
18struct datapath;
19
20#define DP_MAX_BANDS		1
21#define DP_METER_ARRAY_SIZE_MIN	BIT_ULL(10)
22#define DP_METER_NUM_MAX	(200000UL)
23
24struct dp_meter_band {
25	u32 type;
26	u32 rate;
27	u32 burst_size;
28	u64 bucket; /* 1/1000 packets, or in bits */
29	struct ovs_flow_stats stats;
30};
31
32struct dp_meter {
33	spinlock_t lock;    /* Per meter lock */
34	struct rcu_head rcu;
35	u32 id;
36	u16 kbps:1, keep_stats:1;
37	u16 n_bands;
38	u32 max_delta_t;
39	u64 used;
40	struct ovs_flow_stats stats;
41	struct dp_meter_band bands[] __counted_by(n_bands);
42};
43
44struct dp_meter_instance {
45	struct rcu_head rcu;
46	u32 n_meters;
47	struct dp_meter __rcu *dp_meters[] __counted_by(n_meters);
48};
49
50struct dp_meter_table {
51	struct dp_meter_instance __rcu *ti;
52	u32 count;
53	u32 max_meters_allowed;
54};
55
56extern struct genl_family dp_meter_genl_family;
57int ovs_meters_init(struct datapath *dp);
58void ovs_meters_exit(struct datapath *dp);
59bool ovs_meter_execute(struct datapath *dp, struct sk_buff *skb,
60		       struct sw_flow_key *key, u32 meter_id);
61
62#endif /* meter.h */