Method read

api/src/syscall/fs/io.rs:239–249

(&mut self, mut buf: &mut [u8])

    }

    fn read(&mut self, mut buf: &mut [u8]) -> AxResult<usize> {
        match self {
            SendFile::Direct(file) => file.read(&mut buf),
            SendFile::Offset(file, offset) => {
                let off = offset.vm_read()?;
                let bytes_read = file.inner().read_at(&mut buf, off)?;
                offset.vm_write(off + bytes_read as u64)?;
                Ok(bytes_read)
            }
        }
    }

    fn write(&mut self, mut buf: &[u8]) -> AxResult<usize> {
        match self {