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/genetlink.h>
15#include <linux/skbuff.h>
16#include <linux/bits.h>
17
18#include "flow.h"
19struct datapath;
20
21#define DP_MAX_BANDS 1
22#define DP_METER_ARRAY_SIZE_MIN BIT_ULL(10)
23#define DP_METER_NUM_MAX (200000UL)
24
25struct dp_meter_band {
26 u32 type;
27 u32 rate;
28 u32 burst_size;
29 u64 bucket; /* 1/1000 packets, or in bits */
30 struct ovs_flow_stats stats;
31};
32
33struct dp_meter {
34 spinlock_t lock; /* Per meter lock */
35 struct rcu_head rcu;
36 u32 id;
37 u16 kbps:1, keep_stats:1;
38 u16 n_bands;
39 u32 max_delta_t;
40 u64 used;
41 struct ovs_flow_stats stats;
42 struct dp_meter_band bands[] __counted_by(n_bands);
43};
44
45struct dp_meter_instance {
46 struct rcu_head rcu;
47 u32 n_meters;
48 struct dp_meter __rcu *dp_meters[] __counted_by(n_meters);
49};
50
51struct dp_meter_table {
52 struct dp_meter_instance __rcu *ti;
53 u32 count;
54 u32 max_meters_allowed;
55};
56
57extern struct genl_family dp_meter_genl_family;
58int ovs_meters_init(struct datapath *dp);
59void ovs_meters_exit(struct datapath *dp);
60bool ovs_meter_execute(struct datapath *dp, struct sk_buff *skb,
61 struct sw_flow_key *key, u32 meter_id);
62
63#endif /* meter.h */
64

source code of linux/net/openvswitch/meter.h