3         core::generate_inode_id, file::FileMode, syscall::ModeType, FilePrivateData, FileSystem,
66     pub fn poll(&self, private_data: &FilePrivateData) -> Result<usize, SystemError> {  in poll()
69         let mode = if let FilePrivateData::Pipefs(PipeFsPrivateData { mode }) = private_data {  in poll()
189         data_guard: SpinLockGuard<FilePrivateData>,  in read_at()  argument
195         if let FilePrivateData::Pipefs(pdata) = &data {  in read_at()
278         mut data: SpinLockGuard<FilePrivateData>,  in open()  argument
294         *data = FilePrivateData::Pipefs(PipeFsPrivateData { mode: *mode });  in open()
307     fn close(&self, data: SpinLockGuard<FilePrivateData>) -> Result<(), SystemError> {  in close()
309         if let FilePrivateData::Pipefs(pipe_data) = &*data {  in close()
346         data: SpinLockGuard<FilePrivateData>,  in write_at()  argument
350         if let FilePrivateData::Pipefs(pdata) = &*data {  in write_at()
444     fn poll(&self, private_data: &FilePrivateData) -> Result<usize, SystemError> {  in poll()