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net: bridge: add helper to set topology change 

Add a __br_set_topology_change helper to set the topology change value.

This can be later extended to add actions when the topology change flag
is set or cleared.

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
zero-colors
Vivien Didelot 2016-12-10 13:44:28 -05:00 committed by David S. Miller
parent 82dd4332aa
commit 8384b5f5b2
4 changed files with 11 additions and 4 deletions
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1
net/bridge/br_private_stp.h
View File

@ -61,6 +61,7 @@ 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 *);

10
net/bridge/br_stp.c
View File

@ -234,7 +234,7 @@ static void br_record_config_timeout_values(struct net_bridge *br,
br->max_age = bpdu->max_age;
br->hello_time = bpdu->hello_time;
br->forward_delay = bpdu->forward_delay;
br->topology_change = bpdu->topology_change;
__br_set_topology_change(br, bpdu->topology_change);
}
/* called under bridge lock */
@ -344,7 +344,7 @@ void br_topology_change_detection(struct net_bridge *br)
isroot ? "propagating" : "sending tcn bpdu");
if (isroot) {
br->topology_change = 1;
__br_set_topology_change(br, 1);
mod_timer(&br->topology_change_timer, jiffies
+ br->bridge_forward_delay + br->bridge_max_age);
} else if (!br->topology_change_detected) {
@ -603,6 +603,12 @@ int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time)
return 0;
}
/* called under bridge lock */
void __br_set_topology_change(struct net_bridge *br, unsigned char val)
{
br->topology_change = val;
}
void __br_set_forward_delay(struct net_bridge *br, unsigned long t)
{
br->bridge_forward_delay = t;

2
net/bridge/br_stp_if.c
View File

@ -81,7 +81,7 @@ void br_stp_disable_bridge(struct net_bridge *br)
}
br->topology_change = 0;
__br_set_topology_change(br, 0);
br->topology_change_detected = 0;
spin_unlock_bh(&br->lock);

2
net/bridge/br_stp_timer.c
View File

@ -125,7 +125,7 @@ static void br_topology_change_timer_expired(unsigned long arg)
br_debug(br, "topo change timer expired\n");
spin_lock(&br->lock);
br->topology_change_detected = 0;
br->topology_change = 0;
__br_set_topology_change(br, 0);
spin_unlock(&br->lock);
}