mirror of
https://github.com/torvalds/linux.git
synced 2024-12-14 15:13:52 +00:00
eb58eebc7f
Don't allow user to create meter unlimitedly, which may cause to consume a large amount of kernel memory. The max number supported is decided by physical memory and 20K meters as default. 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>
64 lines
1.3 KiB
C
64 lines
1.3 KiB
C
/* 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;
|
|
u32 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 */
|