datapath/meter.h

   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 */