[openib-general] CM ID destruction callback for kernel CM ?

[Hal Rosenstock]

Hi Sean,

The kernel CM is currently capable of destroying the CM ID at the end of
the callback by setting ret to other than 0:
 * Users may not call ib_destroy_cm_id while in the context of this callback;
 * however, returning a non-zero value instructs the communication manager to
 * destroy the @cm_id after the callback completes. 

Perhaps also a CM ID destruction callback could be added to:
struct ib_cm_id *ib_create_cm_id(ib_cm_handler cm_handler,
                                 void *context);
which would also be called (if non NULL) on CM ID destruction at the end
of the CM callback user invoked CM ID destruction. In that way, a client
could cause some additional related destruction immediately subsequent
to the CM ID destruction on its behalf. That might be useful to CM
clients to simplify them.

-- Hal