Commit 709e1b5c authored Mar 01, 2012 by Joakim Tjernlund Committed by David S. Miller Mar 04, 2012

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>

parent aaca735f

net/bridge/br_stp.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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));

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