linux net_bridge结构简介

最新推荐文章于 2025-07-11 15:56:53 发布

taozpwater

最新推荐文章于 2025-07-11 15:56:53 发布

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分类专栏： Linux学习

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这篇博客介绍了Linux 2.6内核中的net_bridge结构，它用于表示网桥的数据结构，包括spinlock锁、port_list、dev设备、统计信息、hash表等组件，并详细阐述了与STP（Spanning Tree Protocol）相关的参数和定时器。

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1、简介

net_bridge结构是表示网桥的数据结构，其内容如下：

struct net_bridge
{
spinlock_t lock;
struct list_headport_list;
struct net_device*dev;
struct net_device_statsstatistics;
spinlock_thash_lock;
struct hlist_headhash[BR_HASH_SIZE];
struct list_headage_list;
unsigned longfeature_mask;

/* STP */
bridge_iddesignated_root;
bridge_idbridge_id;
u32root_path_cost;
unsigned longmax_age;
unsigned longhello_time;
unsigned longforward_delay;
unsigned longbridge_max_age;
unsigned longageing_time;
unsigned longbridge_hello_time;
unsigned longbridge_forward_delay;

u8group_addr[ETH_ALEN];
u16root_port;

enum {
BR_NO_STP,/* no spanning tree */
BR_KERNEL_STP,/* old STP in kernel */
BR_USER_STP,/* new RSTP in userspace */
} stp_enabled;

unsigned chartopology_change;
unsigned chartopology_change_detected;

struct timer_listhello_timer;
struct timer_listtcn_timer;
struct timer_listtopology_change_timer;
struct timer_listgc_timer;
struct kobjectifobj;
};