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"
18 struct 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
24 struct 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
32 struct 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
44 struct 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
50 struct dp_meter_table {
51 struct dp_meter_instance __rcu *ti;
52 u32 count;
53 u32 max_meters_allowed;
54 };
55
56 extern struct genl_family dp_meter_genl_family;
57 int ovs_meters_init(struct datapath *dp);
58 void ovs_meters_exit(struct datapath *dp);
59 bool ovs_meter_execute(struct datapath *dp, struct sk_buff *skb,
60 struct sw_flow_key *key, u32 meter_id);
61
62 #endif /* meter.h */
63
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