160     ) -> Result<(), SystemError> {  in open()  argument
164     fn close(&self, _data: &mut super::vfs::FilePrivateData) -> Result<(), SystemError> {  in close()  argument
174     ) -> Result<usize, SystemError> {  in read_at()
184     ) -> Result<usize, SystemError> {  in write_at()
188     fn poll(&self) -> Result<super::vfs::PollStatus, SystemError> {  in poll()
200     fn metadata(&self) -> Result<Metadata, SystemError> {  in metadata()
208     fn get_entry_name(&self, ino: super::vfs::InodeId) -> Result<String, SystemError> {  in get_entry_name()
240     fn find(&self, name: &str) -> Result<Arc<dyn IndexNode>, SystemError> {  in find()
265     fn ioctl(&self, _cmd: u32, _data: usize) -> Result<usize, SystemError> {  in ioctl()
269     fn list(&self) -> Result<Vec<String>, SystemError> {  in list()
292     ) -> Result<Arc<dyn IndexNode>, SystemError> {  in do_create_with_data()
339     pub fn add_dir(&self, name: &str) -> Result<Arc<dyn IndexNode>, SystemError> {  in add_dir()
359     pub fn add_file(&self, name: &str, file: Arc<dyn IndexNode>) -> Result<(), SystemError> {  in add_file()  argument
386     pub fn remove(&self, name: &str) -> Result<(), SystemError> {  in remove()  argument