fix: adopt go1.23 behavior change in mount point parsing on Windows

fix comments

Author: andyzhangx

pkg/util/filesystem/defaultfs.go

@@ -90,7 +90,7 @@ func MkdirAllWithPathCheck(path string, perm os.FileMode) error {
 		// 1. for Unix/Linux OS, check if the path is directory.
 		// 2. for windows NTFS, check if the path is symlink instead of directory.
 		if dir.IsDir() ||
-			(runtime.GOOS == "windows" && (dir.Mode()&os.ModeSymlink != 0)) {
+			(runtime.GOOS == "windows" && (dir.Mode()&os.ModeSymlink != 0 || dir.Mode()&os.ModeIrregular != 0)) {
 			return nil
 		}
 		return fmt.Errorf("path %v exists but is not a directory", path)

pkg/volume/util/fs/fs_windows.go

@@ -85,6 +85,11 @@ func diskUsage(currPath string, info os.FileInfo) (int64, error) {
 		return size, nil
 	}
 
+	// go1.23 behavior change: https://github.com/golang/go/issues/63703#issuecomment-2535941458
+	if info.Mode()&os.ModeIrregular != 0 {
+		return size, nil
+	}
+
 	size += info.Size()
 
 	if !info.IsDir() {

pkg/volume/util/subpath/subpath_windows.go

@@ -208,6 +208,12 @@ func lockAndCheckSubPathWithoutSymlink(volumePath, subPath string) ([]uintptr, e
 			break
 		}
 
+		// go1.23 behavior change: https://github.com/golang/go/issues/63703#issuecomment-2535941458
+		if stat.Mode()&os.ModeIrregular != 0 {
+			errorResult = fmt.Errorf("subpath %q is an unexpected irregular file after EvalSymlinks", currentFullPath)
+			break
+		}
+
 		if !mount.PathWithinBase(currentFullPath, volumePath) {
 			errorResult = fmt.Errorf("SubPath %q not within volume path %q", currentFullPath, volumePath)
 			break
@@ -342,6 +348,10 @@ func doSafeMakeDir(pathname string, base string, perm os.FileMode) error {
 		if stat.Mode()&os.ModeSymlink != 0 {
 			return fmt.Errorf("subpath %q is an unexpected symlink after Mkdir", currentPath)
 		}
+		// go1.23 behavior change: https://github.com/golang/go/issues/63703#issuecomment-2535941458
+		if stat.Mode()&os.ModeIrregular != 0 {
+			return fmt.Errorf("subpath %q is an unexpected irregular file after Mkdir", currentPath)
+		}
 	}
 
 	return nil

pkg/volume/util/volumepathhandler/volume_path_handler.go

@@ -20,6 +20,7 @@ import (
 	"fmt"
 	"os"
 	"path/filepath"
+	"runtime"
 
 	"k8s.io/klog/v2"
 	"k8s.io/mount-utils"
@@ -232,7 +233,7 @@ func (v VolumePathHandler) RemoveMapPath(mapPath string) error {
 	return nil
 }
 
-// IsSymlinkExist returns true if specified file exists and the type is symbolik link.
+// IsSymlinkExist returns true if specified file exists and the type is symbolik link or irregular file on Windows.
 // If file doesn't exist, or file exists but not symbolic link, return false with no error.
 // On other cases, return false with error from Lstat().
 func (v VolumePathHandler) IsSymlinkExist(mapPath string) (bool, error) {
@@ -249,6 +250,10 @@ func (v VolumePathHandler) IsSymlinkExist(mapPath string) (bool, error) {
 	if fi.Mode()&os.ModeSymlink == os.ModeSymlink {
 		return true, nil
 	}
+	// go1.23 behavior change: https://github.com/golang/go/issues/63703#issuecomment-2535941458
+	if (runtime.GOOS == "windows") && (fi.Mode()&os.ModeIrregular != 0) {
+		return true, nil
+	}
 	// If file exits but it's not symbolic link, return false and no error
 	return false, nil
 }