Function validateMountOptions

opts/mount_utils.go:14–38

validateMountOptions performs client-side validation of mount options. Similar validation happens on the daemon side, but this validation allows us to produce user-friendly errors matching command-line options.

(m *mount.Mount)

// validation happens on the daemon side, but this validation allows us to
// produce user-friendly errors matching command-line options.
func validateMountOptions(m *mount.Mount) error {
	if err := validateExclusiveOptions(m); err != nil {
		return err
	}

	if m.BindOptions != nil {
		if m.BindOptions.ReadOnlyNonRecursive && !m.ReadOnly {
			return errors.New("option 'bind-recursive=writable' requires 'readonly' to be specified in conjunction")
		}
		if m.BindOptions.ReadOnlyForceRecursive {
			if !m.ReadOnly {
				return errors.New("option 'bind-recursive=readonly' requires 'readonly' to be specified in conjunction")
			}
			if m.BindOptions.Propagation != mount.PropagationRPrivate {
				// FIXME(thaJeztah): this is missing daemon-side validation
				//
				//	docker run --rm --mount type=bind,src=/var/run,target=/foo,bind-recursive=readonly,readonly alpine
				//	# no error
				return errors.New("option 'bind-recursive=readonly' requires 'bind-propagation=rprivate' to be specified in conjunction")
			}
		}
	}

	return nil
}

// validateExclusiveOptions checks if the given mount config only contains
// options for the given mount-type.