netdev - Re: [PATCH net-next] bridge: respect RFC2863 operational state

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Date:	Fri, 28 Dec 2012 09:40:08 +0100
From:	Jiri Pirko <jiri@...nulli.us>
To:	Stephen Hemminger <shemminger@...tta.com>
Cc:	David Miller <davem@...emloft.net>, netdev@...r.kernel.org
Subject: Re: [PATCH net-next] bridge: respect RFC2863 operational state

Fri, Dec 28, 2012 at 07:28:54AM CET, shemminger@...tta.com wrote:
>The bridge link detection should follow the operational state
>of the lower device, rather than the carrier bit. This allows devices
>like tunnels that are controlled by userspace control plane to work
>with bridge STP link management.
>
>
>Signed-off-by: Stephen Hemminger <shemminger@...tta.com>
>
>
>--- a/net/bridge/br_if.c	2012-10-25 09:11:15.627272524 -0700
>+++ b/net/bridge/br_if.c	2012-12-14 08:58:14.329847361 -0800
>@@ -66,14 +66,14 @@ void br_port_carrier_check(struct net_br
> 	struct net_device *dev = p->dev;
> 	struct net_bridge *br = p->br;
> 
>-	if (netif_running(dev) && netif_carrier_ok(dev))
>+	if (netif_running(dev) && netif_oper_up(dev))
> 		p->path_cost = port_cost(dev);
> 
> 	if (!netif_running(br->dev))
> 		return;
> 
> 	spin_lock_bh(&br->lock);
>-	if (netif_running(dev) && netif_carrier_ok(dev)) {
>+	if (netif_running(dev) && netif_oper_up(dev))
> 		if (p->state == BR_STATE_DISABLED)
> 			br_stp_enable_port(p);
> 	} else {
>--- a/net/bridge/br_notify.c	2012-10-25 09:11:15.631272484 -0700
>+++ b/net/bridge/br_notify.c	2012-12-14 08:57:36.954222724 -0800
>@@ -82,7 +82,7 @@ static int br_device_event(struct notifi
> 		break;
> 
> 	case NETDEV_UP:
>-		if (netif_carrier_ok(dev) && (br->dev->flags & IFF_UP)) {
>+		if (netif_running(br->dev) && netif_oper_up(dev)) {
> 			spin_lock_bh(&br->lock);
> 			br_stp_enable_port(p);
> 			spin_unlock_bh(&br->lock);
>--
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Reviewed-by: Jiri Pirko <jiri@...nulli.us>

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