[Cluster-devel] Re: [RFC PATCH] dlm: enhancing dlm_controld (pcmk) to be able to handle redundant rings

[Steven Dake <sdake@redhat.com>]

On Fri, 2009-10-23 at 12:55 -0500, David Teigland wrote:
> On Fri, Oct 23, 2009 at 09:23:20PM +0800, Jiaju Zhang wrote:
> +    result = corosync_cfg_ring_status_get(handle,
> +                                       &interface_names,
> +                                       &interface_status,
> +                                       &interface_count);
> +    if (result != CS_OK) {
> +       log_error("Failed to get the ring status (error=%d)", result);
> +       (void)corosync_cfg_finalize(handle);
> +       return -1;
> +    }
> +
> +    (void)corosync_cfg_finalize(handle);
> +    return interface_count;
> 
> What is interface_count if there's one ring up but rrp is configured?
> Could we read the totem/rrp config value from the objdb?
> 
> Dave
> 
Dave,

The rrp mode can be read from the confdb currently.  The other values
cannot be read from the confdb currently.  interface_count is the number
of configured interfaces so that interface_status may be iterated.

Long term the plan is to deprecate all of the APIs related to
config/diag in favor of using confdb (or some successor to this api if
absolutely necessary).  This includes things like the above ring status
api.

We have alot of work to do to get there.  Corosync 2.0 material.