xref: /openbmc/linux/net/openvswitch/meter.h (revision e5735887)
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"
19 struct 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 
25 struct 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 
33 struct 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[];
43 };
44 
45 struct dp_meter_instance {
46 	struct rcu_head rcu;
47 	u32 n_meters;
48 	struct dp_meter __rcu *dp_meters[];
49 };
50 
51 struct dp_meter_table {
52 	struct dp_meter_instance __rcu *ti;
53 	u32 count;
54 	u32 max_meters_allowed;
55 };
56 
57 extern struct genl_family dp_meter_genl_family;
58 int ovs_meters_init(struct datapath *dp);
59 void ovs_meters_exit(struct datapath *dp);
60 bool 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