[Cluster-devel] [PATCH 16/27] iomap: switch iomap_bmap to use iomap_iter

[Christoph Hellwig]

On Mon, Jul 19, 2021 at 10:05:45AM -0700, Darrick J. Wong wrote:
> >  	bno = 0;
> > -	ret = iomap_apply(inode, pos, blocksize, 0, ops, &bno,
> > -			  iomap_bmap_actor);
> > +	while ((ret = iomap_iter(&iter, ops)) > 0) {
> > +		if (iter.iomap.type != IOMAP_MAPPED)
> > +			continue;
> 
> There isn't a mapped extent, so return 0 here, right?

We can't just return 0, we always need the final iomap_iter() call
to clean up in case a ->iomap_end method is supplied.  No for bmap
having and needing one is rather theoretical, but people will copy
and paste that once we start breaking the rules.