360         file_offset: u64,  in read_to_mem()
368         file_offset: u64,  in write_from_mem()
374     async fn punch_hole(&self, file_offset: u64, length: u64) -> Result<()>;  in punch_hole()
377     async fn write_zeroes_at(&self, file_offset: u64, length: u64) -> Result<()>;  in write_zeroes_at()
382     async fn read_double_buffered(&self, file_offset: u64, buf: &mut [u8]) -> Result<usize> {  in read_double_buffered()
390                 file_offset,  in read_double_buffered()
407     async fn write_double_buffered(&self, file_offset: u64, buf: &[u8]) -> Result<usize> {  in write_double_buffered()
414             file_offset,  in write_double_buffered()
465         file_offset: u64,  in read_to_mem()
470             .read_to_mem(Some(file_offset), mem, mem_offsets)  in read_to_mem()
477         file_offset: u64,  in write_from_mem()
482             .write_from_mem(Some(file_offset), mem, mem_offsets)  in write_from_mem()
487     async fn punch_hole(&self, file_offset: u64, length: u64) -> Result<()> {  in punch_hole()
490             return base::linux::discard_block(self.inner.as_source(), file_offset, length)  in punch_hole()
494             .punch_hole(file_offset, length)  in punch_hole()
499     async fn write_zeroes_at(&self, file_offset: u64, length: u64) -> Result<()> {  in write_zeroes_at()
502             .write_zeroes_at(file_offset, length)  in write_zeroes_at()
518                 .write_from_vec(Some(file_offset + nwritten), buf)  in write_zeroes_at()