RDMA/cma: Report connect info with connect events

Connection information was never given to the recipient of a
connection request or reply message.  Only the event was delivered.
Report the connection data with the event to allows user to
reject the connection based on the requested parameters, or adjust
their resources to match the request.
Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

include/rdma/rdma_cm.h

@@ -77,11 +77,25 @@ struct rdma_route {
 	int num_paths;
 };
 
+struct rdma_conn_param {
+	const void *private_data;
+	u8 private_data_len;
+	u8 responder_resources;
+	u8 initiator_depth;
+	u8 flow_control;
+	u8 retry_count;		/* ignored when accepting */
+	u8 rnr_retry_count;
+	/* Fields below ignored if a QP is created on the rdma_cm_id. */
+	u8 srq;
+	u32 qp_num;
+};
+
 struct rdma_cm_event {
 	enum rdma_cm_event_type	 event;
 	int			 status;
-	void			*private_data;
-	u8			 private_data_len;
+	union {
+		struct rdma_conn_param	conn;
+	} param;
 };
 
 struct rdma_cm_id;
@@ -204,19 +218,6 @@ void rdma_destroy_qp(struct rdma_cm_id *id);
 int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
 		       int *qp_attr_mask);
 
-struct rdma_conn_param {
-	const void *private_data;
-	u8 private_data_len;
-	u8 responder_resources;
-	u8 initiator_depth;
-	u8 flow_control;
-	u8 retry_count;		/* ignored when accepting */
-	u8 rnr_retry_count;
-	/* Fields below ignored if a QP is created on the rdma_cm_id. */
-	u8 srq;
-	u32 qp_num;
-};
-
 /**
  * rdma_connect - Initiate an active connection request.
  *