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