XFS_INO64_DIFF
(i8count == 0) * XFS_INO64_DIFF;
newsize = dp->i_df.if_bytes + (sfp->count + 1) * XFS_INO64_DIFF;
newsize = oldsize - (oldsfp->count + 1) * XFS_INO64_DIFF;
newsize = oldsize + (oldsfp->count + 1) * XFS_INO64_DIFF;
incr_isize += (sfp->count + 2) * XFS_INO64_DIFF;