xfs_fsop_resblks  475 fs/xfs/xfs_fs.h #define XFS_IOC_SET_RESBLKS	     _IOWR('X', 114, struct xfs_fsop_resblks)
xfs_fsop_resblks  476 fs/xfs/xfs_fs.h #define XFS_IOC_GET_RESBLKS	     _IOR ('X', 115, struct xfs_fsop_resblks)