Re: [PATCH 28/39] xfs_repair: handle multiple owners of data blocks

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On Wed, Oct 26, 2016 at 10:15:53AM -0700, Darrick J. Wong wrote:
> On Wed, Oct 26, 2016 at 03:57:58AM -0700, Christoph Hellwig wrote:
> > > --- a/repair/dinode.c
> > > +++ b/repair/dinode.c
> > > @@ -722,6 +722,9 @@ _("Fatal error: inode %" PRIu64 " - blkmap_set_ext(): %s\n"
> > >  			 * checking each entry without setting the
> > >  			 * block bitmap
> > >  			 */
> > > +			if (type == XR_INO_DATA &&
> > > +			    xfs_sb_version_hasreflink(&mp->m_sb))
> > > +				goto skip_dup;
> > >  			if (search_dup_extent(agno, agbno, ebno)) {
> > >  				do_warn(
> > >  _("%s fork in ino %" PRIu64 " claims dup extent, "
> > > @@ -731,6 +734,7 @@ _("%s fork in ino %" PRIu64 " claims dup extent, "
> > >  					irec.br_blockcount);
> > >  				goto done;
> > >  			}
> > > +skip_dup:
> > 
> > For some weird reason this goto makes me sad.  I'm getting into
> > major nitpick terretory here, but can we avoid it?  Either duplicate
> > the *tot increment or find some funky condition?
> > 
> > Otherwise this looks fine.
> 
> Ugh, unnecessary goto.  Sad! ;)
> 
> But in all seriousness an 'else if' could do the same work, so:
> 
> if (type == XR_INO_DATA &&
>     xfs_sb_version_hasreflink(&mp->m_sb))
> 	; /* avoid the dup extent check below */
> else if (search_dup_extent(agno, agbno, ebno)) {
> 	do_warn(...);
> }
> *tot += irec.br_blockcount;

Even that is unnecessary, yes?

	if ((type != XR_INO_DATA ||
	     !xfs_sb_version_hasreflink(&mp->m_sb)) &&
	    search_dup_extent(agno, agbno, ebno) {
		do_warn(...);
	}


Cheers,

Dave.
-- 
Dave Chinner
david@xxxxxxxxxxxxx
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