162     fn truncate(&self, len: usize) -> Result<(), SystemError> {  in truncate()  argument
177     fn close(&self, _data: SpinLockGuard<FilePrivateData>) -> Result<(), SystemError> {  in close()  argument
185     ) -> Result<(), SystemError> {  in open()  argument
195     ) -> Result<usize, SystemError> {  in read_at()  argument
227     ) -> Result<usize, SystemError> {  in write_at()  argument
260     fn metadata(&self) -> Result<Metadata, SystemError> {  in metadata()  argument
268     fn set_metadata(&self, metadata: &Metadata) -> Result<(), SystemError> {  in set_metadata()  argument
280     fn resize(&self, len: usize) -> Result<(), SystemError> {  in resize()  argument
296     ) -> Result<Arc<dyn IndexNode>, SystemError> {  in create_with_data()  argument
345     fn link(&self, name: &str, other: &Arc<dyn IndexNode>) -> Result<(), SystemError> {  in link()  argument
377     fn unlink(&self, name: &str) -> Result<(), SystemError> {  in unlink()  argument
401     fn rmdir(&self, name: &str) -> Result<(), SystemError> {  in rmdir()  argument
425     ) -> Result<(), SystemError> {  in move_to()  argument
467     fn find(&self, name: &str) -> Result<Arc<dyn IndexNode>, SystemError> {  in find()  argument
494     fn get_entry_name(&self, ino: InodeId) -> Result<String, SystemError> {  in get_entry_name()  argument
531     fn list(&self) -> Result<Vec<String>, SystemError> {  in list()  argument
558     ) -> Result<Arc<dyn IndexNode>, SystemError> {  in mknod()  argument
622     fn dname(&self) -> Result<DName, SystemError> {  in dname()  argument
626     fn parent(&self) -> Result<Arc<dyn IndexNode>, SystemError> {  in parent()  argument