cleanup: move pkg/ to internal/

The internal/ directory in Go has a special meaning, and indicates that
those packages are not meant for external consumption. Ceph-CSI does
provide public APIs for other projects to consume. There is no plan to
keep the API of the internally used packages stable.

Closes: #903
Signed-off-by: Niels de Vos <ndevos@redhat.com>

internal/csi-common/identityserver-default.go

@@ -0,0 +1,72 @@
+/*
+Copyright 2017 The Kubernetes Authors.
+
+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.
+*/
+
+package csicommon
+
+import (
+	"context"
+
+	"github.com/ceph/ceph-csi/internal/util"
+
+	"github.com/container-storage-interface/spec/lib/go/csi"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+	"k8s.io/klog"
+)
+
+// DefaultIdentityServer stores driver object
+type DefaultIdentityServer struct {
+	Driver *CSIDriver
+}
+
+// GetPluginInfo returns plugin information
+func (ids *DefaultIdentityServer) GetPluginInfo(ctx context.Context, req *csi.GetPluginInfoRequest) (*csi.GetPluginInfoResponse, error) {
+	klog.V(5).Infof(util.Log(ctx, "Using default GetPluginInfo"))
+
+	if ids.Driver.name == "" {
+		return nil, status.Error(codes.Unavailable, "Driver name not configured")
+	}
+
+	if ids.Driver.version == "" {
+		return nil, status.Error(codes.Unavailable, "Driver is missing version")
+	}
+
+	return &csi.GetPluginInfoResponse{
+		Name:          ids.Driver.name,
+		VendorVersion: ids.Driver.version,
+	}, nil
+}
+
+// Probe returns empty response
+func (ids *DefaultIdentityServer) Probe(ctx context.Context, req *csi.ProbeRequest) (*csi.ProbeResponse, error) {
+	return &csi.ProbeResponse{}, nil
+}
+
+// GetPluginCapabilities returns plugin capabilities
+func (ids *DefaultIdentityServer) GetPluginCapabilities(ctx context.Context, req *csi.GetPluginCapabilitiesRequest) (*csi.GetPluginCapabilitiesResponse, error) {
+	klog.V(5).Infof(util.Log(ctx, "Using default capabilities"))
+	return &csi.GetPluginCapabilitiesResponse{
+		Capabilities: []*csi.PluginCapability{
+			{
+				Type: &csi.PluginCapability_Service_{
+					Service: &csi.PluginCapability_Service{
+						Type: csi.PluginCapability_Service_CONTROLLER_SERVICE,
+					},
+				},
+			},
+		},
+	}, nil
+}