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bridge: control carrier based on ports online

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This makes the bridge device behave like a physical device.
In earlier releases the bridge always asserted carrier. This
changes the behavior so that bridge device carrier is on only
if one or more ports are in the forwarding state. This
should help IPv6 autoconfiguration, DHCP, and routing daemons.

I did brief testing with Network and Virt manager and they
seem fine, but since this changes behavior of bridge, it should
wait until net-next (2.6.39).

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Reviewed-by: Nicolas de Pesloüan <nicolas.2p.debian@free.fr>
Tested-By: Adam Majer <adamm@zombino.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
stephen hemminger
2011-03-07 08:34:06 +00:00
committed by David S. Miller
parent 942527634e
commit 1faa4356a3
3 changed files with 27 additions and 13 deletions
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1
net/bridge/br_stp_timer.c
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@ -94,6 +94,7 @@ static void br_forward_delay_timer_expired(unsigned long arg)
p->state = BR_STATE_FORWARDING;
if (br_is_designated_for_some_port(br))
br_topology_change_detection(br);
netif_carrier_on(br->dev);
}
br_log_state(p);
spin_unlock(&br->lock);