xfs_getparents_by_handle
#define XFS_IOC_GETPARENTS_BY_HANDLE _IOWR('X', 63, struct xfs_getparents_by_handle)
XFS_CHECK_STRUCT_SIZE(struct xfs_getparents_by_handle, 64);
struct xfs_getparents_by_handle gph;
struct xfs_getparents_by_handle __user *ureq)
struct xfs_getparents_by_handle *kreq = &gpx.gph;
struct xfs_getparents_by_handle __user *arg);