[openib-general] IPoIB interface for unauthorized partition

[Hal Rosenstock]

On Sun, 2006-04-09 at 17:34, Roland Dreier wrote:
>     Eitan> I thought the intent of the IB spec when defining P_Key
>     Eitan> index usage (and not P_Key value) was that the P_Key values
>     Eitan> would never need to be known above the driver level.  To
>     Eitan> avoid exposing the P_Key values we could use P_Key index
>     Eitan> for creating the IPoIB interfaces.
> 
>     Eitan> Does it make sense to work on a patch that would setup
>     Eitan> IPoIB interfaces by the P_Key index (and not by P_Key
>     Eitan> value)?
> 
> I don't see how this is feasible.  The index that a particular P_Key
> lands at is completely undetermined -- if two nodes wanted to talk on
> partition 0x8001 say, how does one know which interface to use without
> knowing the index of that P_Key?
> 
>     Eitan> Also I think the expected behavior for IPoIB should be that
>     Eitan> IPoIB "child" interfaces should be "automatically"
>     Eitan> initialized by the code that brings up the interface
>     Eitan> (ifconfig scripts). All valid IPoIB partitions (valid =
>     Eitan> have corresponding broadcast groups) should be
>     Eitan> initialized. By doing so we provide a centralized control
>     Eitan> of the partitions and their IPoIB interfaces through the
>     Eitan> SM.
> 
> Not sure if this is so.  I may want a partition strictly for storage
> traffic something like that, so it doesn't make sense to create an
> IPoIB interface for that partition.

Couldn't it be done based on the existence of the appropriate IPoIB
broadcast group for that partition ?

-- Hal