Re: [PATCH 25/26] xfs: support returning partial reflink results

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> @@ -1415,11 +1419,17 @@ xfs_reflink_remap_range(
>  
>  	trace_xfs_reflink_remap_range(src, pos_in, len, dest, pos_out);
>  
> +	if (len == 0) {
> +		ret = 0;
> +		goto out_unlock;
> +	}
> +

As pointed out last time this check is superflous, right above we have
this check:

	if (ret < 0 || len == 0)
		return ret;

>  	ret = xfs_reflink_remap_blocks(src, sfsbno, dest, dfsbno, fsblen,
> -			pos_out + len);
> +			&remappedfsb, pos_out + len);
> +	remapped_bytes = min_t(loff_t, len, XFS_FSB_TO_B(mp, remappedfsb));

I still think returning the bytes from the function would be saner,
but maybe that's just me.



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