qat: make users explicitly opt in to have kernel mode compiled in

Author: Dmitry Rozhkov

Makefile

@@ -32,12 +32,12 @@ lint:
 	@rc=0 ; for f in $$(find -name \*.go | grep -v \.\/vendor) ; do golint -set_exit_status $$f || rc=1 ; done ; exit $$rc
 
 $(cmds):
-	cd cmd/$@; go build
+	cd cmd/$@; $(GO) build
 
 build: $(cmds)
 
 clean:
-	@for cmd in $(cmds) ; do pwd=$(shell pwd) ; cd cmd/$$cmd ; go clean ; cd $$pwd ; done
+	@for cmd in $(cmds) ; do pwd=$(shell pwd) ; cd cmd/$$cmd ; $(GO) clean ; cd $$pwd ; done
 
 TAG?=$(shell git rev-parse HEAD)
 

cmd/qat_plugin/kerneldrv/kerneldrv.go

@@ -12,6 +12,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+// +build kerneldrv
+
 package kerneldrv
 
 import (

cmd/qat_plugin/kerneldrv/kerneldrv_test.go

@@ -12,6 +12,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+// +build kerneldrv
+
 package kerneldrv
 
 import (

cmd/qat_plugin/kerneldrv/stub.go

@@ -0,0 +1,32 @@
+// Copyright 2019 Intel Corporation. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// +build !kerneldrv
+
+package kerneldrv
+
+import (
+	"fmt"
+	"os"
+
+	dpapi "github.com/intel/intel-device-plugins-for-kubernetes/pkg/deviceplugin"
+)
+
+// NewDevicePlugin creates a non-functional stub for kernel mode device plugins.
+func NewDevicePlugin() dpapi.Scanner {
+	fmt.Println("kernel mode is not supported in this build. Use 'kerneldrv' build tag to have this mode enabled. Exiting...")
+	os.Exit(1)
+
+	return nil
+}