c7c4c44c9a
In kernel datapath of Open vSwitch, there are only 1024 buckets of meter in one datapath. If installing more than 1024 (e.g. 8192) meters, it may lead to the performance drop. But in some case, for example, Open vSwitch used as edge gateway, there should be 20K at least, where meters used for IP address bandwidth limitation. [Open vSwitch userspace datapath has this issue too.] For more scalable meter, this patch use meter array instead of hash tables, and expand/shrink the array when necessary. So we can install more meters than before in the datapath. Introducing the struct *dp_meter_instance, it's easy to expand meter though changing the *ti point in the struct *dp_meter_table. Cc: Pravin B Shelar <pshelar@ovn.org> Cc: Andy Zhou <azhou@ovn.org> Signed-off-by: Tonghao Zhang <xiangxia.m.yue@gmail.com> Acked-by: Pravin B Shelar <pshelar@ovn.org> Signed-off-by: David S. Miller <davem@davemloft.net>
62 lines
1.2 KiB
C
62 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (c) 2017 Nicira, Inc.
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*/
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#ifndef METER_H
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#define METER_H 1
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/netlink.h>
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#include <linux/openvswitch.h>
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#include <linux/genetlink.h>
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#include <linux/skbuff.h>
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#include <linux/bits.h>
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#include "flow.h"
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struct datapath;
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#define DP_MAX_BANDS 1
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#define DP_METER_ARRAY_SIZE_MIN BIT_ULL(10)
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struct dp_meter_band {
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u32 type;
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u32 rate;
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u32 burst_size;
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u32 bucket; /* 1/1000 packets, or in bits */
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struct ovs_flow_stats stats;
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};
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struct dp_meter {
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spinlock_t lock; /* Per meter lock */
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struct rcu_head rcu;
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u32 id;
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u16 kbps:1, keep_stats:1;
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u16 n_bands;
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u32 max_delta_t;
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u64 used;
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struct ovs_flow_stats stats;
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struct dp_meter_band bands[];
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};
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struct dp_meter_instance {
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struct rcu_head rcu;
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u32 n_meters;
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struct dp_meter __rcu *dp_meters[];
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};
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struct dp_meter_table {
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struct dp_meter_instance __rcu *ti;
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u32 count;
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};
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extern struct genl_family dp_meter_genl_family;
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int ovs_meters_init(struct datapath *dp);
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void ovs_meters_exit(struct datapath *dp);
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bool ovs_meter_execute(struct datapath *dp, struct sk_buff *skb,
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struct sw_flow_key *key, u32 meter_id);
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#endif /* meter.h */
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