csi-driver-nvmf/pkg/nvmf/nodeserver.go

/*
Copyright 2021 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 nvmf

import (
	"os"

	"github.com/container-storage-interface/spec/lib/go/csi"
	"github.com/kubernetes-csi/csi-driver-nvmf/pkg/utils"
	"golang.org/x/net/context"
	"google.golang.org/grpc/codes"
	"google.golang.org/grpc/status"
	"k8s.io/klog/v2"
)

type NodeServer struct {
	Driver *driver
}

func NewNodeServer(d *driver) *NodeServer {
	return &NodeServer{
		Driver: d,
	}
}

func (n *NodeServer) NodeGetCapabilities(ctx context.Context, req *csi.NodeGetCapabilitiesRequest) (*csi.NodeGetCapabilitiesResponse, error) {
	klog.Infof("Using Nvme NodeGetCapabilities")
	return &csi.NodeGetCapabilitiesResponse{
		Capabilities: []*csi.NodeServiceCapability{
			{
				Type: &csi.NodeServiceCapability_Rpc{
					Rpc: &csi.NodeServiceCapability_RPC{
						Type: csi.NodeServiceCapability_RPC_EXPAND_VOLUME,
					},
				},
			},
		},
	}, nil
}

func (n *NodeServer) NodePublishVolume(ctx context.Context, req *csi.NodePublishVolumeRequest) (*csi.NodePublishVolumeResponse, error) {
	// 1. check parameters
	if req.GetVolumeCapability() == nil {
		return nil, status.Errorf(codes.InvalidArgument, "NodePublishVolume missing Volume Capability in req.")
	}

	if len(req.GetVolumeId()) == 0 {
		return nil, status.Errorf(codes.InvalidArgument, "NodePublishVolume missing VolumeID in req.")
	}

	if len(req.GetTargetPath()) == 0 {
		return nil, status.Errorf(codes.InvalidArgument, "NodePublishVolume missing TargetPath in req.")
	}

	// 2. attachdisk
	nvmfInfo, err := getNVMfDiskInfo(req)
	if err != nil {
		return nil, status.Errorf(codes.Internal, "NodePublishVolume: get NVMf disk info from req err: %v", err)
	}
	diskMounter := getNVMfDiskMounter(nvmfInfo, req)

	// attachDisk realize connect NVMf disk and mount to docker path
	_, err = AttachDisk(req, *diskMounter)
	if err != nil {
		klog.Errorf("NodePublishVolume: Attach volume %s with error: %s", req.VolumeId, err.Error())
		return nil, err
	}

	return &csi.NodePublishVolumeResponse{}, nil
}

func (n *NodeServer) NodeUnpublishVolume(ctx context.Context, req *csi.NodeUnpublishVolumeRequest) (*csi.NodeUnpublishVolumeResponse, error) {
	klog.Infof("NodeUnpublishVolume: Starting unpublish volume, %s, %v", req.VolumeId, req)

	if req.VolumeId == "" {
		return nil, status.Error(codes.InvalidArgument, "NodeUnpublishVolume VolumeID must be provided")
	}
	if req.TargetPath == "" {
		return nil, status.Error(codes.InvalidArgument, "NodeUnpublishVolume Staging TargetPath must be provided")
	}
	targetPath := req.GetTargetPath()
	err := DetachDisk(req.VolumeId, getNVMfDiskUnMounter(req), targetPath)
	if err != nil {
		klog.Errorf("NodeUnpublishVolume: VolumeID: %s detachDisk err: %v", req.VolumeId, err)
		return nil, err
	}

	return &csi.NodeUnpublishVolumeResponse{}, nil
}

func (n *NodeServer) NodeStageVolume(ctx context.Context, req *csi.NodeStageVolumeRequest) (*csi.NodeStageVolumeResponse, error) {
	return &csi.NodeStageVolumeResponse{}, nil
}

func (n *NodeServer) NodeUnstageVolume(ctx context.Context, req *csi.NodeUnstageVolumeRequest) (*csi.NodeUnstageVolumeResponse, error) {
	return &csi.NodeUnstageVolumeResponse{}, nil
}

func (n *NodeServer) NodeExpandVolume(ctx context.Context, req *csi.NodeExpandVolumeRequest) (*csi.NodeExpandVolumeResponse, error) {
	deviceName, err := GetDeviceNameByVolumeID(req.VolumeId)
	if err != nil {
		klog.Errorf("NodeExpandVolume: Get Device by volumeID: %s error %v", req.VolumeId, err)
		return nil, status.Errorf(codes.Internal, "NodeExpandVolume: Get Device by volumeID: %s error %v", req.VolumeId, err)
	}

	scanPath := parseDeviceToControllerPath(deviceName)
	if utils.IsFileExisting(scanPath) {
		file, err := os.OpenFile(scanPath, os.O_RDWR|os.O_TRUNC, 0766)
		if err != nil {
			klog.Errorf("NodeExpandVolume: open scan path %s error: %v", scanPath, err)
			return nil, status.Errorf(codes.Internal, "NodeExpandVolume: open scan path %s error: %v", scanPath, err)
		}
		err = utils.WriteStringToFile(file, "1")
		if err != nil {
			klog.Errorf("NodeExpandVolume: Rescan error: %v", err)
			return nil, status.Errorf(codes.Internal, "NodeExpandVolume: Rescan error: %v", err)
		}
	} else {
		return nil, status.Errorf(codes.Internal, "NodeExpandVolume: rescan path %s not exist", scanPath)
	}

	return &csi.NodeExpandVolumeResponse{}, nil
}

func (n *NodeServer) NodeGetInfo(ctx context.Context, req *csi.NodeGetInfoRequest) (*csi.NodeGetInfoResponse, error) {
	return &csi.NodeGetInfoResponse{
		NodeId: n.Driver.nodeId,
	}, nil
}

func (n *NodeServer) NodeGetVolumeStats(ctx context.Context, req *csi.NodeGetVolumeStatsRequest) (*csi.NodeGetVolumeStatsResponse, error) {
	return nil, status.Errorf(codes.Unimplemented, "NodeGetVolumeStats not implement")
}