/* SPDX-License-Identifier: GPL-2.0-only */

  /*
   * Copyright (c) 2017 Nicira, Inc.

   */
  
  #ifndef METER_H
  #define METER_H 1
  
  #include <linux/init.h>
  #include <linux/module.h>
  #include <linux/kernel.h>
  #include <linux/netlink.h>
  #include <linux/openvswitch.h>
  #include <linux/genetlink.h>
  #include <linux/skbuff.h>

  #include <linux/bits.h>

  
  #include "flow.h"
  struct datapath;
  
  #define DP_MAX_BANDS		1

  #define DP_METER_ARRAY_SIZE_MIN	BIT_ULL(10)

  #define DP_METER_NUM_MAX	(200000UL)

  
  struct dp_meter_band {
  	u32 type;
  	u32 rate;
  	u32 burst_size;

  	u64 bucket; /* 1/1000 packets, or in bits */

  	struct ovs_flow_stats stats;
  };
  
  struct dp_meter {
  	spinlock_t lock;    /* Per meter lock */
  	struct rcu_head rcu;

  	u32 id;
  	u16 kbps:1, keep_stats:1;
  	u16 n_bands;
  	u32 max_delta_t;
  	u64 used;
  	struct ovs_flow_stats stats;
  	struct dp_meter_band bands[];
  };

  struct dp_meter_instance {
  	struct rcu_head rcu;
  	u32 n_meters;
  	struct dp_meter __rcu *dp_meters[];
  };
  
  struct dp_meter_table {
  	struct dp_meter_instance __rcu *ti;
  	u32 count;

  	u32 max_meters_allowed;

  };

  extern struct genl_family dp_meter_genl_family;
  int ovs_meters_init(struct datapath *dp);
  void ovs_meters_exit(struct datapath *dp);
  bool ovs_meter_execute(struct datapath *dp, struct sk_buff *skb,
  		       struct sw_flow_key *key, u32 meter_id);
  
  #endif /* meter.h */