vendor files

vendor/github.com/kubernetes-csi/drivers/pkg/csi-common/driver.go

@@ -0,0 +1,137 @@
+/*
+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 (
+	"github.com/golang/glog"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+
+	"github.com/container-storage-interface/spec/lib/go/csi"
+)
+
+type CSIDriver struct {
+	name    string
+	nodeID  string
+	version *csi.Version
+	supVers []*csi.Version
+	cap     []*csi.ControllerServiceCapability
+	vc      []*csi.VolumeCapability_AccessMode
+}
+
+// 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 string, v *csi.Version, supVers []*csi.Version, nodeID string) *CSIDriver {
+	if name == "" {
+		glog.Errorf("Driver name missing")
+		return nil
+	}
+
+	if nodeID == "" {
+		glog.Errorf("NodeID missing")
+		return nil
+	}
+
+	if v == nil {
+		glog.Errorf("Version argument missing")
+		return nil
+	}
+
+	found := false
+	for _, sv := range supVers {
+		if sv.GetMajor() == v.GetMajor() && sv.GetMinor() == v.GetMinor() && sv.GetPatch() == v.GetPatch() {
+			found = true
+		}
+	}
+
+	if !found {
+		supVers = append(supVers, v)
+	}
+
+	driver := CSIDriver{
+		name:    name,
+		version: v,
+		supVers: supVers,
+		nodeID:  nodeID,
+	}
+
+	return &driver
+}
+
+func (d *CSIDriver) CheckVersion(v *csi.Version) error {
+	if v == nil {
+		return status.Error(codes.InvalidArgument, "Version missing")
+	}
+
+	// Assumes always backward compatible
+	for _, sv := range d.supVers {
+		if v.Major == sv.Major && v.Minor <= sv.Minor {
+			return nil
+		}
+	}
+
+	return status.Error(codes.InvalidArgument, "Unsupported version: "+GetVersionString(v))
+}
+
+func (d *CSIDriver) ValidateControllerServiceRequest(v *csi.Version, c csi.ControllerServiceCapability_RPC_Type) error {
+	if v == nil {
+		return status.Error(codes.InvalidArgument, "Version not specified")
+	}
+
+	if err := d.CheckVersion(v); err != nil {
+		return status.Error(codes.InvalidArgument, "Unsupported version")
+	}
+
+	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, "Unsupported version: "+GetVersionString(v))
+}
+
+func (d *CSIDriver) AddControllerServiceCapabilities(cl []csi.ControllerServiceCapability_RPC_Type) {
+	var csc []*csi.ControllerServiceCapability
+
+	for _, c := range cl {
+		glog.Infof("Enabling controller service capability: %v", c.String())
+		csc = append(csc, NewControllerServiceCapability(c))
+	}
+
+	d.cap = csc
+
+	return
+}
+
+func (d *CSIDriver) AddVolumeCapabilityAccessModes(vc []csi.VolumeCapability_AccessMode_Mode) []*csi.VolumeCapability_AccessMode {
+	var vca []*csi.VolumeCapability_AccessMode
+	for _, c := range vc {
+		glog.Infof("Enabling volume access mode: %v", c.String())
+		vca = append(vca, NewVolumeCapabilityAccessMode(c))
+	}
+	d.vc = vca
+	return vca
+}
+
+func (d *CSIDriver) GetVolumeCapabilityAccessModes() []*csi.VolumeCapability_AccessMode {
+	return d.vc
+}