136     ) -> Result<(), SystemError> {  in open()  argument
145     fn close(&self, _data: SpinLockGuard<FilePrivateData>) -> Result<(), SystemError> {  in close()  argument
165     ) -> Result<usize, SystemError>;  in read_at()  argument
182     ) -> Result<usize, SystemError>;  in write_at()  argument
187     fn poll(&self, _private_data: &FilePrivateData) -> Result<usize, SystemError> {  in poll()  argument
196     fn metadata(&self) -> Result<Metadata, SystemError> {  in metadata()  argument
205     fn set_metadata(&self, _metadata: &Metadata) -> Result<(), SystemError> {  in set_metadata()  argument
217     fn resize(&self, _len: usize) -> Result<(), SystemError> {  in resize()  argument
235     ) -> Result<Arc<dyn IndexNode>, SystemError> {  in create()  argument
255     ) -> Result<Arc<dyn IndexNode>, SystemError> {  in create_with_data()  argument
267     fn link(&self, _name: &str, _other: &Arc<dyn IndexNode>) -> Result<(), SystemError> {  in link()  argument
278     fn unlink(&self, _name: &str) -> Result<(), SystemError> {  in unlink()  argument
289     fn rmdir(&self, _name: &str) -> Result<(), SystemError> {  in rmdir()  argument
302     ) -> Result<(), SystemError> {  in move_to()  argument
313     fn find(&self, _name: &str) -> Result<Arc<dyn IndexNode>, SystemError> {  in find()  argument
324     fn get_entry_name(&self, _ino: InodeId) -> Result<String, SystemError> {  in get_entry_name()  argument
335     fn get_entry_name_and_metadata(&self, ino: InodeId) -> Result<(String, Metadata), SystemError> {  in get_entry_name_and_metadata()  argument
354     ) -> Result<usize, SystemError> {  in ioctl()  argument
363     ) -> Result<usize, SystemError> {  in kernel_ioctl()  argument
375     fn list(&self) -> Result<Vec<String>, SystemError>;  in list()  argument
401     fn mount(&self, _fs: Arc<dyn FileSystem>) -> Result<Arc<MountFS>, SystemError> {  in mount()  argument
426     fn mount_from(&self, _des: Arc<dyn IndexNode>) -> Result<Arc<MountFS>, SystemError> {  in mount_from()  argument
450     fn umount(&self) -> Result<Arc<MountFS>, SystemError> {  in umount()  argument
473     fn absolute_path(&self) -> Result<String, SystemError> {  in absolute_path()  argument
480     fn truncate(&self, _len: usize) -> Result<(), SystemError> {  in truncate()  argument
485     fn sync(&self) -> Result<(), SystemError> {  in sync()  argument
497     ) -> Result<Arc<dyn IndexNode>, SystemError> {  in mknod()  argument
516     fn mkdir(&self, name: &str, mode: ModeType) -> Result<Arc<dyn IndexNode>, SystemError> {  in mkdir()  argument
546     fn dname(&self) -> Result<DName, SystemError> {  in dname()  argument
562     fn parent(&self) -> Result<Arc<dyn IndexNode>, SystemError> {  in parent()  argument
594     pub fn lookup(&self, path: &str) -> Result<Arc<dyn IndexNode>, SystemError> {  in lookup()  argument
609     ) -> Result<Arc<dyn IndexNode>, SystemError> {  in lookup_follow_symlink()  argument
901     pub fn call(&self) -> Result<Arc<dyn FileSystem>, SystemError> {  in call()  argument