xfs_fsop_resblks
#define XFS_IOC_SET_RESBLKS _IOWR('X', 114, struct xfs_fsop_resblks)
#define XFS_IOC_GET_RESBLKS _IOR ('X', 115, struct xfs_fsop_resblks)
XFS_CHECK_STRUCT_SIZE(struct xfs_fsop_resblks, 16);
struct xfs_fsop_resblks fsop = { };