Re: [PATCH 2/6] xfs: attribute scrub should use seen_enough to pass error values

["Darrick J. Wong" <darrick.wong@oracle.com>]

On Fri, Jul 05, 2019 at 10:49:17AM -0400, Brian Foster wrote:
> On Wed, Jun 26, 2019 at 01:46:45PM -0700, Darrick J. Wong wrote:
> > From: Darrick J. Wong <darrick.wong@oracle.com>
> > 
> > When we're iterating all the attributes using the built-in xattr
> > iterator, we can use the seen_enough variable to pass error codes back
> > to the main scrub function instead of flattening them into 0/1.  This
> > will be used in a more exciting fashion in upcoming patches.
> > 
> > Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
> > ---
> >  fs/xfs/scrub/attr.c |    8 ++++++--
> >  1 file changed, 6 insertions(+), 2 deletions(-)
> > 
> > 
> > diff --git a/fs/xfs/scrub/attr.c b/fs/xfs/scrub/attr.c
> > index dce74ec57038..f0fd26abd39d 100644
> > --- a/fs/xfs/scrub/attr.c
> > +++ b/fs/xfs/scrub/attr.c
> > @@ -83,7 +83,7 @@ xchk_xattr_listent(
> >  	sx = container_of(context, struct xchk_xattr, context);
> >  
> >  	if (xchk_should_terminate(sx->sc, &error)) {
> > -		context->seen_enough = 1;
> > +		context->seen_enough = error;
> 
> It might be appropriate to update the xfs_attr_list_context structure
> definition comment since 'seen_enough' is not self explanatory as an
> error code..? Otherwise looks fine:

Ok.  I'll change it to:

	/*
	 * Abort attribute list iteration if non-zero.  Can be used to
	 * pass error values to the xfs_attr_list caller.
	 */

--D

> Reviewed-by: Brian Foster <bfoster@redhat.com>
> 
> >  		return;
> >  	}
> >  
> > @@ -125,7 +125,7 @@ xchk_xattr_listent(
> >  					     args.blkno);
> >  fail_xref:
> >  	if (sx->sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
> > -		context->seen_enough = 1;
> > +		context->seen_enough = XFS_ITER_ABORT;
> >  	return;
> >  }
> >  
> > @@ -464,6 +464,10 @@ xchk_xattr(
> >  	error = xfs_attr_list_int_ilocked(&sx.context);
> >  	if (!xchk_fblock_process_error(sc, XFS_ATTR_FORK, 0, &error))
> >  		goto out;
> > +
> > +	/* Did our listent function try to return any errors? */
> > +	if (sx.context.seen_enough < 0)
> > +		error = sx.context.seen_enough;
> >  out:
> >  	return error;
> >  }
> >