hammer2_get_volume_offset
if (lseek(fd, io_base - hammer2_get_volume_offset(io_base), SEEK_SET)
if (lseek(fd, io_base - hammer2_get_volume_offset(io_base), SEEK_SET)
if (lseek(fd, io_base - hammer2_get_volume_offset(io_base), SEEK_SET)
if (lseek(fd, io_base - hammer2_get_volume_offset(io_base), SEEK_SET)
if (lseek(fd, io_base - hammer2_get_volume_offset(io_base), SEEK_SET)
if (lseek(fd, io_base - hammer2_get_volume_offset(io_base), SEEK_SET)
if (lseek(fd, io_base - hammer2_get_volume_offset(io_base), SEEK_SET)
lseek(fd, io_base - hammer2_get_volume_offset(io_base),
hammer2_off_t hammer2_get_volume_offset(hammer2_off_t offset);
return(hammer2_get_volume_offset(0));