RDMA/cma: Pass QP type into rdma_create_id()

The RDMA CM currently infers the QP type from the port space selected
by the user.  In the future (eg with RDMA_PS_IB or XRC), there may not
be a 1-1 correspondence between port space and QP type.  For netlink
export of RDMA CM state, we want to export the QP type to userspace,
so it is cleaner to explicitly associate a QP type to an ID.

Modify rdma_create_id() to allow the user to specify the QP type, and
use it to make our selections of datagram versus connected mode.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/include/rdma/rdma_cm.h b/include/rdma/rdma_cm.h
index d5b2265b7ce8..26977c149c41 100644
--- a/include/rdma/rdma_cm.h
+++ b/include/rdma/rdma_cm.h
@@ -144,6 +144,7 @@ struct rdma_cm_id {
         rdma_cm_event_handler    event_handler;
         struct rdma_route        route;
         enum rdma_port_space     ps;
+        enum ib_qp_type          qp_type;
         u8                       port_num;
 };
 
@@ -154,9 +155,11 @@ struct rdma_cm_id {
  *   returned rdma_id.
  * @context: User specified context associated with the id.
  * @ps: RDMA port space.
+ * @qp_type: type of queue pair associated with the id.
  */
 struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler,
-                                  void *context, enum rdma_port_space ps);
+                                  void *context, enum rdma_port_space ps,
+                                  enum ib_qp_type qp_type);
 
 /**
   * rdma_destroy_id - Destroys an RDMA identifier.