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

On Tuesday 02 August 2011 08:38, Jason Gunthorpe wrote:

The hope is once the infrastructure is in libibverbs there will not
be as much need to change libibverbs, just the apps and the drivers.

If I understand correctly, the various additions which would normally be made to libibverbs
would then be made by third-party libraries which extend libibverbs to support their additions.

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.

The modified apps would then include the header files of the 3rd party additions
after the libibverbs headers when compiling.

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.

Am I correct?  If so, shouldn't the current XRC userspace implementation do the same (and
take the XRC-specific additions out of libibverbs and put them into a separate library)?

Note that coordination between third parties would still be required to insure that there is
no collision of enum values between the various packages.

-Jack
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