126     fn open(&self, data: &mut FilePrivateData, mode: &FileMode) -> Result<(), SystemError> {  in open()
130     fn close(&self, data: &mut FilePrivateData) -> Result<(), SystemError> {  in close()
135         &self,  in create_with_data()
146     fn truncate(&self, len: usize) -> Result<(), SystemError> {  in truncate()
151         &self,  in read_at()
161         &self,  in write_at()
191     fn set_metadata(&self, metadata: &super::Metadata) -> Result<(), SystemError> {  in set_metadata()
196     fn resize(&self, len: usize) -> Result<(), SystemError> {  in resize()
202         &self,  in create()
215     fn link(&self, name: &str, other: &Arc<dyn IndexNode>) -> Result<(), SystemError> {  in link()
221     fn unlink(&self, name: &str) -> Result<(), SystemError> {  in unlink()
233     fn rmdir(&self, name: &str) -> Result<(), SystemError> {  in rmdir()
248         &self,  in move_()
256     fn find(&self, name: &str) -> Result<Arc<dyn IndexNode>, SystemError> {  in find()
298     fn get_entry_name(&self, ino: InodeId) -> Result<alloc::string::String, SystemError> {  in get_entry_name()
304         &self,  in get_entry_name_and_metadata()
311     fn ioctl(&self, cmd: u32, data: usize) -> Result<usize, SystemError> {  in ioctl()
323     fn mount(&self, fs: Arc<dyn FileSystem>) -> Result<Arc<MountFS>, SystemError> {  in mount()