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bridge: message age needs to increase, not decrease. 

commit bridge: send proper message_age in config BPDU
added this gem:
  bpdu.message_age = (jiffies - root->designated_age)
  p->designated_age = jiffies + bpdu->message_age;
Notice how bpdu->message_age is negated when reassigned to
bpdu.message_age. This causes message age to decrease breaking the
STP protocol.

Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Joakim Tjernlund 2012-03-01 08:12:19 +00:00 committed by David S. Miller
parent aaca735f4f
commit 709e1b5cd9
1 changed files with 1 additions and 1 deletions
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2
net/bridge/br_stp.c
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@ -186,7 +186,7 @@ static void br_record_config_information(struct net_bridge_port *p,
p->designated_cost = bpdu->root_path_cost;
p->designated_bridge = bpdu->bridge_id;
p->designated_port = bpdu->port_id;
p->designated_age = jiffies + bpdu->message_age;
p->designated_age = jiffies - bpdu->message_age;
mod_timer(&p->message_age_timer, jiffies
+ (p->br->max_age - bpdu->message_age));