LXR linux/net/openvswitch/meter.h

   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"
  19struct 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
  25struct 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
  33struct 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
  45struct dp_meter_instance {
  46        struct rcu_head rcu;
  47        u32 n_meters;
  48        struct dp_meter __rcu *dp_meters[];
  49};
  50
  51struct dp_meter_table {
  52        struct dp_meter_instance __rcu *ti;
  53        u32 count;
  54        u32 max_meters_allowed;
  55};
  56
  57extern struct genl_family dp_meter_genl_family;
  58int ovs_meters_init(struct datapath *dp);
  59void ovs_meters_exit(struct datapath *dp);
  60bool 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