129     fn open(&self, data: &mut FilePrivateData) -> Result<(), i32> {  in open()
133     fn close(&self, data: &mut FilePrivateData) -> Result<(), i32> {  in close()
138         &self,  in create_with_data()
149     fn truncate(&self, len: usize) -> Result<(), i32> {  in truncate()
154         &self,  in read_at()
164         &self,  in write_at()
196     fn set_metadata(&self, metadata: &super::Metadata) -> Result<(), i32> {  in set_metadata()
201     fn resize(&self, len: usize) -> Result<(), i32> {  in resize()
207         &self,  in create()
220     fn link(&self, name: &str, other: &Arc<dyn IndexNode>) -> Result<(), i32> {  in link()
226     fn unlink(&self, name: &str) -> Result<(), i32> {  in unlink()
238     fn rmdir(&self, name: &str) -> Result<(), i32> {  in rmdir()
253         &self,  in move_()
261     fn find(&self, name: &str) -> Result<Arc<dyn IndexNode>, i32> {  in find()
303     fn get_entry_name(&self, ino: InodeId) -> Result<alloc::string::String, i32> {  in get_entry_name()
309         &self,  in get_entry_name_and_metadata()
316     fn ioctl(&self, cmd: u32, data: usize) -> Result<usize, i32> {  in ioctl()
328     fn mount(&self, fs: Arc<dyn FileSystem>) -> Result<Arc<MountFS>, i32> {  in mount()