[Ocfs2-devel] [PATCH 25/26] xfs: support returning partial reflink results

[Darrick J. Wong]

On Wed, Oct 17, 2018 at 01:40:02AM -0700, Christoph Hellwig wrote:
> > @@ -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;

Oops, sorry I missed that, will fix now.

> >  	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.

Hmmm, this call site is getting messy; I'll tack on another patch to
clean that up too.

--D