ceph: avoid updating directory inode's i_size accidentally

	if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) > 0 ||

	    (truncate_seq == ci->i_truncate_seq && size > inode->i_size)) {

		dout("size %lld -> %llu\n", inode->i_size, size);

		if (size > 0 && S_ISDIR(inode->i_mode)) {

			pr_err("fill_file_size non-zero size for directory\n");

			size = 0;

		}

		i_size_write(inode, size);

		inode->i_blocks = (size + (1<<9) - 1) >> 9;

		ci->i_reported_size = size;