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/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 */