RE: [PATCH 2/6] IB: match connection requests based on private data

RE: [PATCH 2/6] IB: match connection requests based on private data

[Caitlin Bestler]

 

> -----Original Message-----
> From: netdev-owner@vger.kernel.org 
> [mailto:netdev-owner@vger.kernel.org] On Behalf Of Sean Hefty
> Sent: Monday, March 06, 2006 11:04 AM
> To: 'Roland Dreier'
> Cc: netdev@vger.kernel.org; linux-kernel@vger.kernel.org; 
> openib-general@openib.org
> Subject: [PATCH 2/6] IB: match connection requests based on 
> private data
> 
> Extend matching connection requests to listens in the 
> Infiniband CM to include private data checks.
> 
> This allows applications to listen on the same service 
> identifier, with private data directing the request to the 
> appropriate application.
> 
> Signed-off-by: Sean Hefty <sean.hefty@intel.com>
> 

The term "private data" is intended to convey the
intent that the data is private to the application
layer and is opaque to middleware and the network.

By what mechanism does the listening application
delegate how much of the private data for use by
the CM for sub-dividing a listen? What does an 
application do if it wishes to retain full ownership
of the private data?

Re: [openib-general] RE: [PATCH 2/6] IB: match connection requests based on private data

[Sean Hefty]

Caitlin Bestler wrote:
> The term "private data" is intended to convey the
> intent that the data is private to the application
> layer and is opaque to middleware and the network.

The private data area is for the use of whatever client resides above the 
Infiniband CM only.  There is no assumption about whether that client is 
middleware or an application.

> By what mechanism does the listening application
> delegate how much of the private data for use by
> the CM for sub-dividing a listen? What does an 
> application do if it wishes to retain full ownership
> of the private data?

An application that interfaces directly with the Infiniband CM always retains 
full control of any private data.  Applications that interface to middleware are 
restricted by the limitations of that middleware layer.

- Sean