func downloadReleaseURL(u *url.URL, timeout time.Duration, mode string) (content string, err error) {
	req, err := http.NewRequest(http.MethodGet, u.String(), nil)
	if err != nil {
		return content, AdminError{
			Code:       AdminUpdateUnexpectedFailure,
			Message:    err.Error(),
			StatusCode: http.StatusInternalServerError,
		}
	}
	req.Header.Set("User-Agent", getUserAgent(mode))

func Mkdir(dirPath string, mode os.FileMode) (err error) {
	defer updateOSMetrics(osMetricMkdir, dirPath)(err)
	return os.Mkdir(dirPath, mode)
}

// MkdirAll captures time taken to call os.MkdirAll
func MkdirAll(dirPath string, mode os.FileMode, baseDir string) (err error) {
	defer updateOSMetrics(osMetricMkdirAll, dirPath)(err)
	return osMkdirAll(dirPath, mode, baseDir)
}

	globalWindowsOSName            = "windows"
	globalMacOSName                = "darwin"
	globalMinioModeFS              = "mode-server-fs"
	globalMinioModeErasureSD       = "mode-server-xl-single"
	globalMinioModeErasure         = "mode-server-xl"
	globalMinioModeDistErasure     = "mode-server-distributed-xl"
	globalDirSuffix                = "__XLDIR__"
	globalDirSuffixWithSlash       = globalDirSuffix + slashSeparator

	v := FileInfo{Volume: "testbucket", Name: "src/compress/zlib/reader_test.go", VersionID: "", IsLatest: true, Deleted: false, DataDir: "5e0153cc-621a-4267-8cb6-4919140d53b3", XLV1: false, ModTime: UTCNow(), Size: 3430, Mode: 0x0, Metadata: map[string]string{"X-Minio-Internal-Server-Side-Encryption-Iv": "jIJPsrkkVYYMvc7edBrNl+7zcM7+ZwXqMb/YAjBO/ck=", "X-Minio-Internal-Server-Side-Encryption-S3-Kms-Key-Id": "my-minio-key", "X-Minio-Internal-Server-Side-Encryption-S3-Kms-Sealed-Key":...

		if err != nil {
			return false
		}
		return len(entries) == 0
	}
	var stat syscall.Stat_t
	if err := syscall.Stat(dirname, &stat); err != nil {
		return false
	}
	return stat.Mode&syscall.S_IFMT == syscall.S_IFDIR && stat.Nlink == 2

// OpenFileDirectIO - bypass kernel cache.
func OpenFileDirectIO(filePath string, flag int, perm os.FileMode) (*os.File, error) {
	return directio.OpenFile(filePath, flag, perm)
}

// DisableDirectIO - disables directio mode.
func DisableDirectIO(f *os.File) error {
	fd := f.Fd()
	flag, err := unix.FcntlInt(fd, unix.F_GETFL, 0)
	if err != nil {
		return err
	}
	flag &= ^(syscall.O_DIRECT)
	_, err = unix.FcntlInt(fd, unix.F_SETFL, flag)

			Err:  syscall.EISDIR,
		}
	}

	return &LockedFile{File: f}, nil
}

// TryLockedOpenFile - tries a new write lock, functionality
// it is similar to LockedOpenFile with with syscall.LOCK_EX
// mode but along with syscall.LOCK_NB such that the function
// doesn't wait forever but instead returns if it cannot
// acquire a write lock.
func TryLockedOpenFile(path string, flag int, perm os.FileMode) (*LockedFile, error) {

func IsLikelyMountPoint(path string) bool {
	s1, err := os.Lstat(path)
	if err != nil {
		return false
	}

	// A symlink can never be a mount point
	if s1.Mode()&os.ModeSymlink != 0 {
		return false
	}

	s2, err := os.Lstat(filepath.Dir(strings.TrimSuffix(path, "/")))
	if err != nil {
		return false
	}

	}

	ret := objectlock.GetObjectRetentionMeta(oi.UserDefined)
	if ret.Mode.Valid() {
		switch ret.Mode {
		case objectlock.RetCompliance:
			// In compliance mode, a protected object version can't be overwritten
			// or deleted by any user, including the root user in your AWS account.
			// When an object is locked in compliance mode, its retention mode can't
			// be changed, and its retention period can't be shortened. Compliance mode

// to proceed to next entry.
var errSkipFile = errors.New("skip this file")

var errIgnoreFileContrib = errors.New("ignore this file's contribution toward data-usage")

// errXLBackend XL drive mode requires fresh deployment.
var errXLBackend = errors.New("XL backend requires fresh drive")

// StorageErr represents error generated by xlStorage call.
type StorageErr string

func (h StorageErr) Error() string {