[openib-general] IPoIB broadcast MC group membership

[Fabian Tillier]

Hi Hal,

On 28 Feb 2006 14:41:58 -0500, Hal Rosenstock <halr at voltaire.com> wrote:
> Hi again Fab,
>
> On Tue, 2006-02-21 at 01:10, Fabian Tillier wrote:
> > Specifically, the problem relates to handling a 1X node trying to join
> > the broadcast group, and what the retry policy should be.  If the
> > group already exists at 4X, the join should fail if the SM follows the
> > compliance statements in the IB spec.
>
> Correct; it should fail with ERR_REQ_INVALID
>
> > Because the code allowed for
> > the broadcast group not pre-existing (that is, a join could fail
> > because the group wasn't created), it was unclear whether a failure of
> > the join indicated that there was a setting incompatibility (1X vs.
> > 4X), or just whether the group needed to be created.
>
> A join to a nonexistent group should return
> ERR_REQ_INSUFFICIENT_COMPONENTS.
>
> Is this sufficient or is more needed ?

Hmm, this should allow the loop to end - an ERR_REQ_INVALID response
to the join would break out of the loop.  ERR_REQ_INVALID to the
create goes to join...

I had missed this status code, thanks!  I think it will work, and will
let you know if it doesn't.

Thanks,

- Fab