1 /* 2 * Copyright (c) 2017 Nicira, Inc. 3 * 4 * This program is free software; you can redistribute it and/or 5 * modify it under the terms of version 2 of the GNU General Public 6 * License as published by the Free Software Foundation. 7 */ 8 9 #ifndef METER_H 10 #define METER_H 1 11 12 #include <linux/init.h> 13 #include <linux/module.h> 14 #include <linux/kernel.h> 15 #include <linux/netlink.h> 16 #include <linux/openvswitch.h> 17 #include <linux/genetlink.h> 18 #include <linux/skbuff.h> 19 20 #include "flow.h" 21 struct datapath; 22 23 #define DP_MAX_BANDS 1 24 25 struct dp_meter_band { 26 u32 type; 27 u32 rate; 28 u32 burst_size; 29 u32 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 struct hlist_node dp_hash_node; /*Element in datapath->meters 37 * hash table. 38 */ 39 u32 id; 40 u16 kbps:1, keep_stats:1; 41 u16 n_bands; 42 u32 max_delta_t; 43 u64 used; 44 struct ovs_flow_stats stats; 45 struct dp_meter_band bands[]; 46 }; 47 48 extern struct genl_family dp_meter_genl_family; 49 int ovs_meters_init(struct datapath *dp); 50 void ovs_meters_exit(struct datapath *dp); 51 bool ovs_meter_execute(struct datapath *dp, struct sk_buff *skb, 52 struct sw_flow_key *key, u32 meter_id); 53 54 #endif /* meter.h */ 55