func()

in mount_windows.go [79:161]

• 65 lines of code
• 15 McCabe index (conditional complexity)

func (mounter *Mounter) MountSensitive(source string, target string, fstype string, options []string, sensitiveOptions []string) error {
	target = NormalizeWindowsPath(target)
	sanitizedOptionsForLogging := sanitizedOptionsForLogging(options, sensitiveOptions)

	if source == "tmpfs" {
		klog.V(3).Infof("mounting source (%q), target (%q), with options (%q)", source, target, sanitizedOptionsForLogging)
		return os.MkdirAll(target, 0755)
	}

	parentDir := filepath.Dir(target)
	if err := os.MkdirAll(parentDir, 0755); err != nil {
		return err
	}

	klog.V(4).Infof("mount options(%q) source:%q, target:%q, fstype:%q, begin to mount",
		sanitizedOptionsForLogging, source, target, fstype)
	bindSource := source

	if bind, _, _, _ := MakeBindOptsSensitive(options, sensitiveOptions); bind {
		bindSource = NormalizeWindowsPath(source)
	} else {
		allOptions := []string{}
		allOptions = append(allOptions, options...)
		allOptions = append(allOptions, sensitiveOptions...)
		if len(allOptions) < 2 {
			return fmt.Errorf("mount options(%q) should have at least 2 options, current number:%d, source:%q, target:%q",
				sanitizedOptionsForLogging, len(allOptions), source, target)
		}

		// currently only cifs mount is supported
		if strings.ToLower(fstype) != "cifs" {
			return fmt.Errorf("only cifs mount is supported now, fstype: %q, mounting source (%q), target (%q), with options (%q)", fstype, source, target, sanitizedOptionsForLogging)
		}

		// lock smb mount for the same source
		getSMBMountMutex.LockKey(source)
		defer getSMBMountMutex.UnlockKey(source)

		username := allOptions[0]
		password := allOptions[1]
		if output, err := newSMBMapping(username, password, source); err != nil {
			klog.Warningf("SMB Mapping(%s) returned with error(%v), output(%s)", source, err, string(output))
			if isSMBMappingExist(source) {
				valid, err := isValidPath(source)
				if !valid {
					if err == nil || isAccessDeniedError(err) {
						klog.V(2).Infof("SMB Mapping(%s) already exists while it's not valid, return error: %v, now begin to remove and remount", source, err)
						if output, err = removeSMBMapping(source); err != nil {
							return fmt.Errorf("Remove-SmbGlobalMapping failed: %v, output: %q", err, output)
						}
						if output, err := newSMBMapping(username, password, source); err != nil {
							return fmt.Errorf("New-SmbGlobalMapping(%s) failed: %v, output: %q", source, err, output)
						}
					}
				} else {
					klog.V(2).Infof("SMB Mapping(%s) already exists and is still valid, skip error(%v)", source, err)
				}
			} else {
				return fmt.Errorf("New-SmbGlobalMapping(%s) failed: %v, output: %q", source, err, output)
			}
		}
	}

	// There is an issue in golang where EvalSymlinks fails on Windows when passed a
	// UNC share root path without a trailing backslash.
	// Ex: \\SERVER\share will fail to resolve but \\SERVER\share\ will resolve
	// containerD on Windows calls EvalSymlinks so we'll add the backslash when making the symlink if it is missing.
	// https://github.com/golang/go/pull/42096 fixes this issue in golang but a fix will not be available until
	// golang v1.16
	mklinkSource := bindSource
	if !strings.HasSuffix(mklinkSource, "\\") {
		mklinkSource = mklinkSource + "\\"
	}

	output, err := exec.Command("cmd", "/c", "mklink", "/D", target, mklinkSource).CombinedOutput()
	if err != nil {
		klog.Errorf("mklink failed: %v, source(%q) target(%q) output: %q", err, mklinkSource, target, string(output))
		return err
	}
	klog.V(2).Infof("mklink source(%q) on target(%q) successfully, output: %q", mklinkSource, target, string(output))

	return nil
}