func MakeBindOptsSensitive()

in mount/mount.go [271:314]
32 lines of code
8 McCabe index (conditional complexity)

func MakeBindOptsSensitive(options []string, sensitiveOptions []string) (bool, []string, []string, []string) {
	// Because we have an FD opened on the subpath bind mount, the "bind" option
	// needs to be included, otherwise the mount target will error as busy if you
	// remount as readonly.
	//
	// As a consequence, all read only bind mounts will no longer change the underlying
	// volume mount to be read only.
	bindRemountOpts := []string{"bind", "remount"}
	bindRemountSensitiveOpts := []string{}
	bind := false
	bindOpts := []string{"bind"}

	// _netdev is a userspace mount option and does not automatically get added when
	// bind mount is created and hence we must carry it over.
	if checkForNetDev(options, sensitiveOptions) {
		bindOpts = append(bindOpts, "_netdev")
	}

	for _, option := range options {
		switch option {
		case "bind":
			bind = true
			break
		case "remount":
			break
		default:
			bindRemountOpts = append(bindRemountOpts, option)
		}
	}

	for _, sensitiveOption := range sensitiveOptions {
		switch sensitiveOption {
		case "bind":
			bind = true
			break
		case "remount":
			break
		default:
			bindRemountSensitiveOpts = append(bindRemountSensitiveOpts, sensitiveOption)
		}
	}

	return bind, bindOpts, bindRemountOpts, bindRemountSensitiveOpts
}