fix: refine GetFreeSpace call on Windows

go.mod

@@ -27,6 +27,7 @@ require (
 	go.uber.org/mock v0.4.0
 	golang.org/x/net v0.22.0
 	golang.org/x/sync v0.6.0
+	golang.org/x/sys v0.18.0
 	google.golang.org/grpc v1.61.1
 	google.golang.org/protobuf v1.33.0
 	k8s.io/api v0.29.3
@@ -134,7 +135,6 @@ require (
 	golang.org/x/exp v0.0.0-20231214170342-aacd6d4b4611 // indirect
 	golang.org/x/mod v0.14.0 // indirect
 	golang.org/x/oauth2 v0.15.0 // indirect
-	golang.org/x/sys v0.18.0 // indirect
 	golang.org/x/term v0.18.0 // indirect
 	golang.org/x/text v0.14.0 // indirect
 	golang.org/x/time v0.5.0 // indirect

pkg/azuredisk/nodeserver.go

@@ -513,6 +513,10 @@ func (d *Driver) NodeExpandVolume(_ context.Context, req *csi.NodeExpandVolumeRe
 		klog.Errorf("%v, will continue checking whether the volume has been resized", retErr)
 	}
 
+	if runtime.GOOS == "windows" && d.enableWindowsHostProcess {
+		// in windows host process mode, this driver could get the volume size from the volume path
+		devicePath = volumePath
+	}
 	gotBlockSizeBytes, err := getBlockSizeBytes(devicePath, d.mounter)
 	if err != nil {
 		return nil, status.Error(codes.Internal, fmt.Sprintf("could not get size of block volume at path %s: %v", devicePath, err))

pkg/mounter/safe_mounter_host_process_windows.go

@@ -27,6 +27,9 @@ import (
 	"strings"
 
 	"github.com/container-storage-interface/spec/lib/go/csi"
+	"golang.org/x/sys/windows"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
 	"k8s.io/klog/v2"
 	mount "k8s.io/mount-utils"
 
@@ -224,32 +227,36 @@ func (mounter *winMounter) GetDeviceNameFromMount(mountPath, pluginMountDir stri
 }
 
 // GetVolumeSizeInBytes returns the size of the volume in bytes.
-func (mounter *winMounter) GetVolumeSizeInBytes(devicePath string) (int64, error) {
-	volumeSize, _, err := volume.GetVolumeStats(devicePath)
-	return volumeSize, err
+func (mounter *winMounter) GetVolumeSizeInBytes(volumePath string) (int64, error) {
+	_, totalBytes, _, err := GetFreeSpace(volumePath)
+	return totalBytes, err
 }
 
 // ResizeVolume resizes the volume to the maximum available size.
 func (mounter *winMounter) ResizeVolume(devicePath string) error {
 	return volume.ResizeVolume(devicePath, 0)
 }
 
+// GetFreeSpace returns the free space of the volume in bytes, total size of the volume in bytes and the used space of the volume in bytes
+func GetFreeSpace(path string) (int64, int64, int64, error) {
+	var totalNumberOfBytes, totalNumberOfFreeBytes uint64
+	dirName := windows.StringToUTF16Ptr(path)
+	err := windows.GetDiskFreeSpaceEx(dirName, nil, &totalNumberOfBytes, &totalNumberOfFreeBytes)
+	return int64(totalNumberOfFreeBytes), int64(totalNumberOfBytes), int64(totalNumberOfBytes - totalNumberOfFreeBytes), err
+}
+
 // GetVolumeStats get volume usage
 func (mounter *winMounter) GetVolumeStats(ctx context.Context, path string) (*csi.VolumeUsage, error) {
-	volumeID, err := volume.GetVolumeIDFromTargetPath(path)
+	freeBytesAvailable, totalBytes, totalBytesUsed, err := GetFreeSpace(path)
 	if err != nil {
-		return nil, fmt.Errorf("GetVolumeIDFromMount(%s) failed with error: %v", path, err)
-	}
-	klog.V(6).Infof("GetVolumeStats(%s) returned volumeID(%s)", path, volumeID)
-	volumeSize, volumeUsedSize, err := volume.GetVolumeStats(volumeID)
-	if err != nil {
-		return nil, fmt.Errorf("GetVolumeStats(%s) failed with error: %v", volumeID, err)
+		return nil, status.Errorf(codes.Internal, "failed to get free space on path %s: %v", path, err)
 	}
+
 	volUsage := &csi.VolumeUsage{
 		Unit:      csi.VolumeUsage_BYTES,
-		Available: volumeSize - volumeUsedSize,
-		Total:     volumeSize,
-		Used:      volumeUsedSize,
+		Available: freeBytesAvailable,
+		Total:     totalBytes,
+		Used:      totalBytesUsed,
 	}
 	return volUsage, nil
 }

pkg/os/volume/volume.go

@@ -177,30 +177,6 @@ func ResizeVolume(volumeID string, size int64) error {
 	return nil
 }
 
-// GetVolumeStats - retrieves the volume stats for a given volume
-func GetVolumeStats(volumeID string) (int64, int64, error) {
-	// get the size and sizeRemaining for the volume
-	cmd := "(Get-Volume -UniqueId \"$Env:volumeID\" | Select SizeRemaining,Size) | ConvertTo-Json"
-	out, err := azureutils.RunPowershellCmd(cmd, fmt.Sprintf("volumeID=%s", volumeID))
-
-	if err != nil {
-		return -1, -1, fmt.Errorf("error getting capacity and used size of volume. cmd: %s, output: %s, error: %v", cmd, string(out), err)
-	}
-
-	var getVolume map[string]int64
-	outString := string(out)
-	err = json.Unmarshal([]byte(outString), &getVolume)
-	if err != nil {
-		return -1, -1, fmt.Errorf("out %v outstring %v err %v", out, outString, err)
-	}
-
-	volumeSize := getVolume["Size"]
-	volumeSizeRemaining := getVolume["SizeRemaining"]
-
-	volumeUsedSize := volumeSize - volumeSizeRemaining
-	return volumeSize, volumeUsedSize, nil
-}
-
 // GetDiskNumberFromVolumeID - gets the disk number where the volume is.
 func GetDiskNumberFromVolumeID(volumeID string) (uint32, error) {
 	// get the size and sizeRemaining for the volume