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/driver.go

@@ -0,0 +1,109 @@
+/*
+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 (
+	"fmt"
+
+	"github.com/container-storage-interface/spec/lib/go/csi"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+	"k8s.io/klog"
+)
+
+// CSIDriver stores driver information
+type CSIDriver struct {
+	name    string
+	nodeID  string
+	version string
+	// topology constraints that this nodeserver will advertise
+	topology map[string]string
+	cap      []*csi.ControllerServiceCapability
+	vc       []*csi.VolumeCapability_AccessMode
+}
+
+// NewCSIDriver Creates a NewCSIDriver object. Assumes vendor
+// version is equal to driver version &  does not support optional
+// driver plugin info manifest field. Refer to CSI spec for more details.
+func NewCSIDriver(name, v, nodeID string) *CSIDriver {
+	if name == "" {
+		klog.Errorf("Driver name missing")
+		return nil
+	}
+
+	if nodeID == "" {
+		klog.Errorf("NodeID missing")
+		return nil
+	}
+	// TODO version format and validation
+	if v == "" {
+		klog.Errorf("Version argument missing")
+		return nil
+	}
+
+	driver := CSIDriver{
+		name:    name,
+		version: v,
+		nodeID:  nodeID,
+	}
+
+	return &driver
+}
+
+// ValidateControllerServiceRequest validates the controller
+// plugin capabilities
+func (d *CSIDriver) ValidateControllerServiceRequest(c csi.ControllerServiceCapability_RPC_Type) error {
+	if c == csi.ControllerServiceCapability_RPC_UNKNOWN {
+		return nil
+	}
+
+	for _, cap := range d.cap {
+		if c == cap.GetRpc().GetType() {
+			return nil
+		}
+	}
+	return status.Error(codes.InvalidArgument, fmt.Sprintf("%s", c)) //nolint
+}
+
+// AddControllerServiceCapabilities stores the controller capabilities
+// in driver object
+func (d *CSIDriver) AddControllerServiceCapabilities(cl []csi.ControllerServiceCapability_RPC_Type) {
+	var csc []*csi.ControllerServiceCapability
+
+	for _, c := range cl {
+		klog.V(1).Infof("Enabling controller service capability: %v", c.String())
+		csc = append(csc, NewControllerServiceCapability(c))
+	}
+
+	d.cap = csc
+}
+
+// AddVolumeCapabilityAccessModes stores volume access modes
+func (d *CSIDriver) AddVolumeCapabilityAccessModes(vc []csi.VolumeCapability_AccessMode_Mode) []*csi.VolumeCapability_AccessMode {
+	var vca []*csi.VolumeCapability_AccessMode
+	for _, c := range vc {
+		klog.V(1).Infof("Enabling volume access mode: %v", c.String())
+		vca = append(vca, NewVolumeCapabilityAccessMode(c))
+	}
+	d.vc = vca
+	return vca
+}
+
+// GetVolumeCapabilityAccessModes returns access modes
+func (d *CSIDriver) GetVolumeCapabilityAccessModes() []*csi.VolumeCapability_AccessMode {
+	return d.vc
+}