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/utils.go

@@ -0,0 +1,179 @@
+/*
+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"
+	"fmt"
+	"runtime/debug"
+	"strings"
+	"sync/atomic"
+
+	"github.com/ceph/ceph-csi/internal/util"
+
+	"github.com/container-storage-interface/spec/lib/go/csi"
+	"github.com/kubernetes-csi/csi-lib-utils/protosanitizer"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+	"k8s.io/klog"
+)
+
+func parseEndpoint(ep string) (string, string, error) {
+	if strings.HasPrefix(strings.ToLower(ep), "unix://") || strings.HasPrefix(strings.ToLower(ep), "tcp://") {
+		s := strings.SplitN(ep, "://", 2)
+		if s[1] != "" {
+			return s[0], s[1], nil
+		}
+	}
+	return "", "", fmt.Errorf("invalid endpoint: %v", ep)
+}
+
+// NewVolumeCapabilityAccessMode returns volume access mode
+func NewVolumeCapabilityAccessMode(mode csi.VolumeCapability_AccessMode_Mode) *csi.VolumeCapability_AccessMode {
+	return &csi.VolumeCapability_AccessMode{Mode: mode}
+}
+
+// NewDefaultNodeServer initializes default node server
+func NewDefaultNodeServer(d *CSIDriver, t string, topology map[string]string) *DefaultNodeServer {
+	d.topology = topology
+	return &DefaultNodeServer{
+		Driver: d,
+		Type:   t,
+	}
+}
+
+// NewDefaultIdentityServer initializes default identity servier
+func NewDefaultIdentityServer(d *CSIDriver) *DefaultIdentityServer {
+	return &DefaultIdentityServer{
+		Driver: d,
+	}
+}
+
+// NewDefaultControllerServer initializes default controller server
+func NewDefaultControllerServer(d *CSIDriver) *DefaultControllerServer {
+	return &DefaultControllerServer{
+		Driver: d,
+	}
+}
+
+// NewControllerServiceCapability returns controller capabilities
+func NewControllerServiceCapability(ctrlCap csi.ControllerServiceCapability_RPC_Type) *csi.ControllerServiceCapability {
+	return &csi.ControllerServiceCapability{
+		Type: &csi.ControllerServiceCapability_Rpc{
+			Rpc: &csi.ControllerServiceCapability_RPC{
+				Type: ctrlCap,
+			},
+		},
+	}
+}
+
+// RunNodePublishServer starts node server
+func RunNodePublishServer(endpoint, hstOption string, d *CSIDriver, ns csi.NodeServer, m bool) {
+	ids := NewDefaultIdentityServer(d)
+
+	s := NewNonBlockingGRPCServer()
+	s.Start(endpoint, hstOption, ids, nil, ns, m)
+	s.Wait()
+}
+
+// RunControllerPublishServer starts controller server
+func RunControllerPublishServer(endpoint, hstOption string, d *CSIDriver, cs csi.ControllerServer, m bool) {
+	ids := NewDefaultIdentityServer(d)
+
+	s := NewNonBlockingGRPCServer()
+	s.Start(endpoint, hstOption, ids, cs, nil, m)
+	s.Wait()
+}
+
+// RunControllerandNodePublishServer starts both controller and node server
+func RunControllerandNodePublishServer(endpoint, hstOption string, d *CSIDriver, cs csi.ControllerServer, ns csi.NodeServer, m bool) {
+	ids := NewDefaultIdentityServer(d)
+
+	s := NewNonBlockingGRPCServer()
+	s.Start(endpoint, hstOption, ids, cs, ns, m)
+	s.Wait()
+}
+
+func getReqID(req interface{}) string {
+	// if req is nil empty string will be returned
+	reqID := ""
+	switch r := req.(type) {
+	case *csi.CreateVolumeRequest:
+		reqID = r.Name
+
+	case *csi.DeleteVolumeRequest:
+		reqID = r.VolumeId
+
+	case *csi.CreateSnapshotRequest:
+		reqID = r.Name
+	case *csi.DeleteSnapshotRequest:
+		reqID = r.SnapshotId
+
+	case *csi.ControllerExpandVolumeRequest:
+		reqID = r.VolumeId
+
+	case *csi.NodeStageVolumeRequest:
+		reqID = r.VolumeId
+	case *csi.NodeUnstageVolumeRequest:
+		reqID = r.VolumeId
+
+	case *csi.NodePublishVolumeRequest:
+		reqID = r.VolumeId
+	case *csi.NodeUnpublishVolumeRequest:
+		reqID = r.VolumeId
+
+	case *csi.NodeExpandVolumeRequest:
+		reqID = r.VolumeId
+	}
+	return reqID
+}
+
+var id uint64
+
+func contextIDInjector(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (resp interface{}, err error) {
+	atomic.AddUint64(&id, 1)
+	ctx = context.WithValue(ctx, util.CtxKey, id)
+	reqID := getReqID(req)
+	if reqID != "" {
+		ctx = context.WithValue(ctx, util.ReqID, reqID)
+	}
+	return handler(ctx, req)
+}
+
+func logGRPC(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error) {
+	klog.V(3).Infof(util.Log(ctx, "GRPC call: %s"), info.FullMethod)
+	klog.V(5).Infof(util.Log(ctx, "GRPC request: %s"), protosanitizer.StripSecrets(req))
+	resp, err := handler(ctx, req)
+	if err != nil {
+		klog.Errorf(util.Log(ctx, "GRPC error: %v"), err)
+	} else {
+		klog.V(5).Infof(util.Log(ctx, "GRPC response: %s"), protosanitizer.StripSecrets(resp))
+	}
+	return resp, err
+}
+
+func panicHandler(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (resp interface{}, err error) {
+	defer func() {
+		if r := recover(); r != nil {
+			klog.Errorf("panic occurred: %v", r)
+			debug.PrintStack()
+			err = status.Errorf(codes.Internal, "panic %v", r)
+		}
+	}()
+	return handler(ctx, req)
+}