21     syscall::SystemError,
115 ) -> Result<(), SystemError> {  in do_migrate()  argument
133 fn migrate_virtual_filesystem(new_fs: Arc<dyn FileSystem>) -> Result<(), SystemError> {  in migrate_virtual_filesystem()  argument
179     let fatfs: Result<Arc<FATFileSystem>, SystemError> = FATFileSystem::new(partiton);  in mount_root_fs()
203 pub fn do_mkdir(path: &str, _mode: FileMode) -> Result<u64, SystemError> {  in do_mkdir()  argument
206         return Err(SystemError::ENAMETOOLONG);  in do_mkdir()
209     let inode: Result<Arc<dyn IndexNode>, SystemError> = ROOT_INODE().lookup(path);  in do_mkdir()
214         if errno == SystemError::ENOENT {  in do_mkdir()
232 pub fn do_remove_dir(path: &str) -> Result<u64, SystemError> {  in do_remove_dir()  argument
235         return Err(SystemError::ENAMETOOLONG);  in do_remove_dir()
238     let inode: Result<Arc<dyn IndexNode>, SystemError> = ROOT_INODE().lookup(path);  in do_remove_dir()
243         if errno == SystemError::ENOENT {  in do_remove_dir()
244             return Err(SystemError::ENOENT);  in do_remove_dir()
253         return Err(SystemError::ENOTDIR);  in do_remove_dir()
258         return Err(SystemError::ENOTDIR);  in do_remove_dir()
268 pub fn do_unlink_at(path: &str, _mode: FileMode) -> Result<u64, SystemError> {  in do_unlink_at()  argument
271         return Err(SystemError::ENAMETOOLONG);  in do_unlink_at()
274     let inode: Result<Arc<dyn IndexNode>, SystemError> = ROOT_INODE().lookup(path);  in do_unlink_at()
279         if errno == SystemError::ENOENT {  in do_unlink_at()
280             return Err(SystemError::ENOENT);  in do_unlink_at()
285         return Err(SystemError::EPERM);  in do_unlink_at()
293         return Err(SystemError::ENOTDIR);  in do_unlink_at()