libcontainer/intelrdt: introduce NewManager()

Introduce NewManager() to wrap up IntelRdtManager initialization. And
call it when required.

Signed-off-by: Xiaochen Shen <xiaochen.shen@intel.com>

libcontainer/factory_linux.go

@@ -149,11 +149,7 @@ func RootlessCgroupfs(l *LinuxFactory) error {
 // create and manage Intel RDT resources (e.g., L3 cache, memory bandwidth).
 func IntelRdtFs(l *LinuxFactory) error {
 	l.NewIntelRdtManager = func(config *configs.Config, id string, path string) intelrdt.Manager {
-		return &intelrdt.IntelRdtManager{
-			Config: config,
-			Id:     id,
-			Path:   path,
-		}
+		return intelrdt.NewManager(config, id, path)
 	}
 	return nil
 }

libcontainer/intelrdt/intelrdt.go

@@ -172,6 +172,14 @@ type IntelRdtManager struct {
 	Path   string
 }
 
+func NewManager(config *configs.Config, id string, path string) Manager {
+	return &IntelRdtManager{
+		Config: config,
+		Id:     id,
+		Path:   path,
+	}
+}
+
 const (
 	IntelRdtTasks = "tasks"
 )

libcontainer/intelrdt/intelrdt_test.go

@@ -26,10 +26,7 @@ func TestIntelRdtSetL3CacheSchema(t *testing.T) {
 	})
 
 	helper.IntelRdtData.config.IntelRdt.L3CacheSchema = l3CacheSchemeAfter
-	intelrdt := &IntelRdtManager{
-		Config: helper.IntelRdtData.config,
-		Path:   helper.IntelRdtPath,
-	}
+	intelrdt := NewManager(helper.IntelRdtData.config, "", helper.IntelRdtPath)
 	if err := intelrdt.Set(helper.IntelRdtData.config); err != nil {
 		t.Fatal(err)
 	}
@@ -64,10 +61,7 @@ func TestIntelRdtSetMemBwSchema(t *testing.T) {
 	})
 
 	helper.IntelRdtData.config.IntelRdt.MemBwSchema = memBwSchemeAfter
-	intelrdt := &IntelRdtManager{
-		Config: helper.IntelRdtData.config,
-		Path:   helper.IntelRdtPath,
-	}
+	intelrdt := NewManager(helper.IntelRdtData.config, "", helper.IntelRdtPath)
 	if err := intelrdt.Set(helper.IntelRdtData.config); err != nil {
 		t.Fatal(err)
 	}
@@ -102,10 +96,7 @@ func TestIntelRdtSetMemBwScSchema(t *testing.T) {
 	})
 
 	helper.IntelRdtData.config.IntelRdt.MemBwSchema = memBwScSchemeAfter
-	intelrdt := &IntelRdtManager{
-		Config: helper.IntelRdtData.config,
-		Path:   helper.IntelRdtPath,
-	}
+	intelrdt := NewManager(helper.IntelRdtData.config, "", helper.IntelRdtPath)
 	if err := intelrdt.Set(helper.IntelRdtData.config); err != nil {
 		t.Fatal(err)
 	}

update.go

@@ -317,11 +317,7 @@ other options are ignored.
 					return err
 				}
 				config.IntelRdt = &configs.IntelRdt{}
-				intelRdtManager := intelrdt.IntelRdtManager{
-					Config: &config,
-					Id:     container.ID(),
-					Path:   state.IntelRdtPath,
-				}
+				intelRdtManager := intelrdt.NewManager(&config, container.ID(), state.IntelRdtPath)
 				if err := intelRdtManager.Apply(state.InitProcessPid); err != nil {
 					return err
 				}