Re: [PATCH 1/2] libibverbs: Allow 3rd party extensions to verb routines

[Jason Gunthorpe <jgunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>]

On Tue, Aug 02, 2011 at 10:53:05AM +0300, Jack Morgenstein wrote:

> These additions would include the new ibv_cmd_xxx functions
> (the core functions reside in src/cmd.c), and new, additional, enum values of
> the form IBV_USER_VERBS_CMD_XXXX, of which the core enum is in file
> include/infiniband/kern_abi.h.

I believe the only case where using an extension would make sense if
it if can be implemented entirely within the low level driver. So you
can't add new ibv_cmd calls to ibverbs, must duplicate them in your
driver, etc.

I'm a little unclear on how the application is going to get the access
enums and other structure definitions, though.. I suppose the low
level driver can install a .h file as well.
 
> Each new third-party package would need such a library.  While this
> will lead to a multiplicity of new libraries (one per addition), the
> core libibverbs package would remain as is.

I definitely don't want to see this..

Jason
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