Initial publication of ZFSSA CSI driver

pkg/service/node_fs.go

@@ -0,0 +1,101 @@
+/*
+ * Copyright (c) 2021, Oracle and/or its affiliates.
+ * Licensed under the Universal Permissive License v 1.0 as shown at https://oss.oracle.com/licenses/upl/
+ */
+
+package service
+
+import (
+	"fmt"
+	"os"
+	"strings"
+
+	"github.com/oracle/zfssa-csi-driver/pkg/utils"
+	"github.com/oracle/zfssa-csi-driver/pkg/zfssarest"
+	"github.com/container-storage-interface/spec/lib/go/csi"
+	"golang.org/x/net/context"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+)
+
+func (zd *ZFSSADriver) nodePublishFileSystem(ctx context.Context, token *zfssarest.Token,
+	req *csi.NodePublishVolumeRequest, vid *utils.VolumeId, mountOptions []string,
+	mode *csi.VolumeCapability_Mount) (*csi.NodePublishVolumeResponse, error) {
+
+	targetPath := req.GetTargetPath()
+	notMnt, err := zd.NodeMounter.IsLikelyNotMountPoint(targetPath)
+	if err != nil {
+		if os.IsNotExist(err) {
+			if err := os.MkdirAll(targetPath, 0750); err != nil {
+				return nil, status.Error(codes.Internal, err.Error())
+			}
+			notMnt = true
+		} else {
+			return nil, status.Error(codes.Internal, err.Error())
+		}
+	}
+
+	if !notMnt {
+		return &csi.NodePublishVolumeResponse{}, nil
+	}
+
+	s := req.GetVolumeContext()["nfsServer"]
+	ep, found := req.GetVolumeContext()["mountpoint"]
+	if !found {
+		// The volume context of the volume provisioned from an existing share does not have the mountpoint.
+		// Use the share (corresponding to volumeAttributes.share of PV configuration) to get the mountpoint.
+		ep = req.GetVolumeContext()["share"]
+	}
+
+	source := fmt.Sprintf("%s:%s", s, ep)
+	utils.GetLogNODE(ctx, 5).Println("nodePublishFileSystem", "mount_point", source)
+
+	err = zd.NodeMounter.Mount(source, targetPath, "nfs", mountOptions)
+	if err != nil {
+		if os.IsPermission(err) {
+			return nil, status.Error(codes.PermissionDenied, err.Error())
+		}
+		if strings.Contains(err.Error(), "invalid argument") {
+			return nil, status.Error(codes.InvalidArgument, err.Error())
+		}
+		return nil, status.Error(codes.Internal, err.Error())
+	}
+
+	return &csi.NodePublishVolumeResponse{}, nil
+}
+
+func (zd *ZFSSADriver) nodeUnpublishFilesystemVolume(token *zfssarest.Token,
+	ctx context.Context, req *csi.NodeUnpublishVolumeRequest, vid *utils.VolumeId) (
+	*csi.NodeUnpublishVolumeResponse, error) {
+
+	utils.GetLogNODE(ctx, 5).Println("nodeUnpublishFileSystem", "request", req)
+
+	targetPath := req.GetTargetPath()
+	if len(targetPath) == 0 {
+		return nil, status.Error(codes.InvalidArgument, "Target path not provided")
+	}
+
+	err := zd.NodeMounter.Unmount(targetPath)
+	if err != nil {
+		utils.GetLogNODE(ctx, 2).Println("Cannot unmount volume",
+			"volume_id", req.GetVolumeId(), "error", err.Error())
+		return nil, status.Error(codes.Internal, err.Error())
+	}
+
+	notMnt, mntErr := zd.NodeMounter.IsLikelyNotMountPoint(targetPath)
+	if mntErr != nil {
+		utils.GetLogNODE(ctx, 2).Println("Cannot determine target path",
+			"target_path", targetPath, "error", err.Error())
+		return nil, status.Error(codes.Internal, err.Error())
+	}
+
+	if notMnt {
+		if err := os.Remove(targetPath); err != nil {
+			utils.GetLogNODE(ctx, 2).Println("Cannot delete target path",
+				"target_path", targetPath, "error", err.Error())
+			return nil, status.Error(codes.Internal, err.Error())
+		}
+	}
+
+	return &csi.NodeUnpublishVolumeResponse{}, nil
+}