[libvirt] [PATCH] lxc: do cleanup when failed to create new string

[Chen Hanxiao]

> -----Original Message-----
> From: Martin Kletzander [mailto:mkletzan at redhat.com]
> Sent: Wednesday, January 15, 2014 2:36 PM
> To: Chen Hanxiao
> Cc: libvir-list at redhat.com
> Subject: Re: [libvirt] [PATCH] lxc: do cleanup when failed to create new
string
> 
> > > >      if (virAsprintf(&logfile, "%s/%s.log",
> > > >                      cfg->logDir, vm->def->name) < 0)
> > > > -        return -1;
> > > > +       goto cleanup;
> > > >
> > >
> > > I see nothing in that cleanup that needs to be done in this codepath.
> > > The only thing which might be needed is cleaning up the
> > > vm->def->resource, but that doesn't make much sense to me.  Can you
> > > explain the change?
> > >
> >
> > But the code structure looks weird.
> > We have already used 'cleanup' before this section.
> >
> 
> I'd rather see either a) the two previous gotos changed into returns
> (which means using a cleanup only where it needs to be done) or b)
> using cleanups everywhere, but this doesn't go with what we use
> elsewhere and the cleanup in this section is *really* huge, so it's
> unnecessary to go there, I guess.
> 
> Anyway, me not ACKing it doesn't mean someone else can't agree with
> you, I just wanted to know the reason (whether there have been a leak
> or something).

I didn't spot any issues through tests.
But when I read these codes, I felt weird about this section.
As we leaked so little memory here and it seldom happened,
let's keep what they were.

Thanks
> 
> Martin