On Fri, Oct 11, 2019 at 07:14:46PM +0800, yu kuai wrote: > ioctl expect 'getbmapx' as the 'arg' when the cmd is XFS_IOC_GETBMAPX. > But the definition in 'xfs_fs.h' is 'getbmap' Strictly speaking that is true. But changing this defintion will break existing userspace given that _IOWR encodes the structure size. If you had reported this 16 years earlier we could have fixed it.