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