ceph-csi/pkg/csi-common/driver.go

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/*
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 (
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"fmt"
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"github.com/container-storage-interface/spec/lib/go/csi"
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"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
"k8s.io/klog"
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)
// CSIDriver stores driver information
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type CSIDriver struct {
name string
nodeID string
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version string
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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 {
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if name == "" {
klog.Errorf("Driver name missing")
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return nil
}
if nodeID == "" {
klog.Errorf("NodeID missing")
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return nil
}
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// TODO version format and validation
if v == "" {
klog.Errorf("Version argument missing")
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return nil
}
driver := CSIDriver{
name: name,
version: v,
nodeID: nodeID,
}
return &driver
}
// ValidateControllerServiceRequest validates the controller
// plugin capabilities
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func (d *CSIDriver) ValidateControllerServiceRequest(c csi.ControllerServiceCapability_RPC_Type) error {
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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
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}
// AddControllerServiceCapabilities stores the controller capabilities
// in driver object
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func (d *CSIDriver) AddControllerServiceCapabilities(cl []csi.ControllerServiceCapability_RPC_Type) {
var csc []*csi.ControllerServiceCapability
for _, c := range cl {
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klog.V(1).Infof("Enabling controller service capability: %v", c.String())
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csc = append(csc, NewControllerServiceCapability(c))
}
d.cap = csc
}
// AddVolumeCapabilityAccessModes stores volume access modes
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func (d *CSIDriver) AddVolumeCapabilityAccessModes(vc []csi.VolumeCapability_AccessMode_Mode) []*csi.VolumeCapability_AccessMode {
var vca []*csi.VolumeCapability_AccessMode
for _, c := range vc {
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klog.V(1).Infof("Enabling volume access mode: %v", c.String())
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vca = append(vca, NewVolumeCapabilityAccessMode(c))
}
d.vc = vca
return vca
}
// GetVolumeCapabilityAccessModes returns access modes
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func (d *CSIDriver) GetVolumeCapabilityAccessModes() []*csi.VolumeCapability_AccessMode {
return d.vc
}