swh:1:snp:173f8deb0c56c557784b4fd217e7608ac6197844
Tip revision: 09162bc32c880a791c6c0668ce0745cf7958f576 authored by Linus Torvalds on 16 November 2020, 00:44:31 UTC
Linux 5.10-rc4
Linux 5.10-rc4
Tip revision: 09162bc
br_private_stp.h
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Linux ethernet bridge
*
* Authors:
* Lennert Buytenhek <buytenh@gnu.org>
*/
#ifndef _BR_PRIVATE_STP_H
#define _BR_PRIVATE_STP_H
#define BPDU_TYPE_CONFIG 0
#define BPDU_TYPE_TCN 0x80
/* IEEE 802.1D-1998 timer values */
#define BR_MIN_HELLO_TIME (1*HZ)
#define BR_MAX_HELLO_TIME (10*HZ)
#define BR_MIN_FORWARD_DELAY (2*HZ)
#define BR_MAX_FORWARD_DELAY (30*HZ)
#define BR_MIN_MAX_AGE (6*HZ)
#define BR_MAX_MAX_AGE (40*HZ)
#define BR_MIN_PATH_COST 1
#define BR_MAX_PATH_COST 65535
struct br_config_bpdu {
unsigned int topology_change:1;
unsigned int topology_change_ack:1;
bridge_id root;
int root_path_cost;
bridge_id bridge_id;
port_id port_id;
int message_age;
int max_age;
int hello_time;
int forward_delay;
};
/* called under bridge lock */
static inline int br_is_designated_port(const struct net_bridge_port *p)
{
return !memcmp(&p->designated_bridge, &p->br->bridge_id, 8) &&
(p->designated_port == p->port_id);
}
/* br_stp.c */
void br_become_root_bridge(struct net_bridge *br);
void br_config_bpdu_generation(struct net_bridge *);
void br_configuration_update(struct net_bridge *);
void br_port_state_selection(struct net_bridge *);
void br_received_config_bpdu(struct net_bridge_port *p,
const struct br_config_bpdu *bpdu);
void br_received_tcn_bpdu(struct net_bridge_port *p);
void br_transmit_config(struct net_bridge_port *p);
void br_transmit_tcn(struct net_bridge *br);
void br_topology_change_detection(struct net_bridge *br);
void __br_set_topology_change(struct net_bridge *br, unsigned char val);
/* br_stp_bpdu.c */
void br_send_config_bpdu(struct net_bridge_port *, struct br_config_bpdu *);
void br_send_tcn_bpdu(struct net_bridge_port *);
#endif