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bridge: fix initial packet flood if !STP 

If bridge is configured with no STP and forwarding delay of 0 (which
is typical for virtualization) then when link starts it will flood all
packets for the first 20 seconds.

This bug was introduced by a combination of earlier changes:
  * forwarding database uses hold time of zero to indicate
    user wants to always flood packets
  * optimzation of the case of forwarding delay of 0 avoids the initial
    timer tick

The fix is to just skip all the topology change detection code if
kernel STP is not being used.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Stephen Hemminger 2009-05-15 06:11:58 +00:00 committed by David S. Miller
parent a598f6aebe
commit 4f0611af47
1 changed files with 3 additions and 0 deletions
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3
net/bridge/br_stp.c
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@ -297,6 +297,9 @@ void br_topology_change_detection(struct net_bridge *br)
{
int isroot = br_is_root_bridge(br);
if (br->stp_enabled != BR_KERNEL_STP)
return;
pr_info("%s: topology change detected, %s\n", br->dev->name,
isroot ? "propagating" : "sending tcn bpdu");