Re: HSR: How to set IF_OPER_LOWERLAYERDOWN?

Stephen Hemminger
2012-06-26T22:33:33Z

On Tue, 26 Jun 2012 22:28:51 +0000
Arvid Brodin <Arvid.Brodin@xdin.com> wrote:

> Hi,
>
> According to Documentation/networking/operstates.txt a network interface have an
> operational state and an administrative state.
>
> If I understand things correctly the administrative state is the desired state set by
> userspace, and the operational state is the actual state which depends on things like the
> administrative state, whether a carrier is present, or (for virtual interfaces lite VLAN)
> whether the lower interface is available.
>
>
> In the driver I'm writing (for the "HSR" redundancy protocol) a hsr (virtual) interface is
> useable as long as any of its (physical) slaves are useable. I.e. the operstate of a hsr
> device might be set like this:
>
> void hsr_set_operstate()
> {
> if (!is_admin_up(hsr_dev)) /* Check IFF_UP */ {
> set_operstate(hsr_dev, IF_OPER_DOWN);
> return;
> }
>
> if (is_operstate_up(slave1) || is_operstate_up(slave2)) /* Check IF_OPER_UP */
> set_operstate(hsr_dev, IF_OPER_UP);
> else
> set_operstate(hsr_dev, IF_OPER_LOWERLAYERDOWN);
> }

According to 802.1X example in documentation to set it down you need to set IF_OPER_DORMANT
not IF_OPER_LOWERLAYERDOWN. Probably a kernel bug in there somwhere.