netdev - Re: [PATCH net-next] team: account for oper state

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Message-ID: <20180418145822.GE1989@nanopsycho>
Date:   Wed, 18 Apr 2018 16:58:22 +0200
From:   Jiri Pirko <jiri@...nulli.us>
To:     George Wilkie <gwilkie@...tta.att-mail.com>
Cc:     netdev@...r.kernel.org
Subject: Re: [PATCH net-next] team: account for oper state

Wed, Apr 18, 2018 at 03:35:49PM CEST, gwilkie@...tta.att-mail.com wrote:
>On Wed, Apr 18, 2018 at 02:56:44PM +0200, Jiri Pirko wrote:
>> Wed, Apr 18, 2018 at 12:29:50PM CEST, gwilkie@...tta.att-mail.com wrote:
>> >Account for operational state when determining port linkup state,
>> >as per Documentation/networking/operstates.txt.
>> 
>> Could you please point me to the exact place in the document where this
>> is suggested?
>> 
>
>Various places cover it I think.
>
>In 1. Introduction:
>"interface is not usable just because the admin enabled it"
>"userspace must be granted the possibility to
>influence operational state"
>
>In 4. Setting from userspace:
>"the userspace application can set IFLA_OPERSTATE
>to IF_OPER_DORMANT or IF_OPER_UP as long as the driver does not set
>netif_carrier_off() or netif_dormant_on()"
>
>We have a use case where we want to set the oper state of the team ports based
>on whether they are actually usable or not (as opposed to just admin up).

Are you running a supplicant there or what is the use-case?

How is this handle in other drivers like bond, openvswitch, bridge, etc?

>
>Cheers.
>
>> 
>> >
>> >Signed-off-by: George Wilkie <gwilkie@...tta.att-mail.com>
>> >---
>> > drivers/net/team/team.c | 3 ++-
>> > 1 file changed, 2 insertions(+), 1 deletion(-)
>> >
>> >diff --git a/drivers/net/team/team.c b/drivers/net/team/team.c
>> >index a6c6ce19eeee..231264a05e55 100644
>> >--- a/drivers/net/team/team.c
>> >+++ b/drivers/net/team/team.c
>> >@@ -2918,7 +2918,8 @@ static int team_device_event(struct notifier_block *unused,
>> > 	case NETDEV_CHANGE:
>> > 		if (netif_running(port->dev))
>> > 			team_port_change_check(port,
>> >-					       !!netif_carrier_ok(port->dev));
>> >+					       !!(netif_carrier_ok(port->dev) &&
>> >+						  netif_oper_up(port->dev)));
>> > 		break;
>> > 	case NETDEV_UNREGISTER:
>> > 		team_del_slave(port->team->dev, dev);
>> >-- 
>> >2.11.0
>> >