Re: [Qemu-devel] [PATCH v2 11/12] qmp: update qmp_query_spice fallback

["Marc-André Lureau" <mlureau@redhat.com>]

----- Original Message -----
> marcandre.lureau@redhat.com writes:
> 
> > From: Marc-André Lureau <marcandre.lureau@redhat.com>
> >
> > There are a few commands that are undef #ifdef conditions in
> 
> under #ifdef
> 
> > qmp-commands.hx. Move all the qmp_query_spice fallback in the same
> > location, return an error and update the comment.
> >
> > Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
> > ---
> >  monitor.c | 14 ++++++++++++++
> >  qmp.c     | 16 ----------------
> >  2 files changed, 14 insertions(+), 16 deletions(-)
> >
> > diff --git a/monitor.c b/monitor.c
> > index c87089f..46966d5 100644
> > --- a/monitor.c
> > +++ b/monitor.c
> > @@ -4048,6 +4048,20 @@ QemuOptsList qemu_mon_opts = {
> >      },
> >  };
> >  
> > +/*
> > + * the QAPI schema is blissfully unaware #ifdef FOO commands, and the
> > + * QAPI code generator happily generates a dead qmp_marshal_foo_cmd()
> > + * that calls qmp_foo_cmd().  Provide it one, or else linking fails.
> > + * FIXME Educate the QAPI schema on #ifdef commands.
> > + */
> > +#ifndef CONFIG_SPICE
> > +SpiceInfo *qmp_query_spice(Error **errp)
> > +{
> > +    error_setg(errp, QERR_FEATURE_DISABLED, "spice");
> > +    return NULL;
> 
> Why do you change from abort() to error_setg()?

The rest of the commands do not abort. It sounds to easy to trigger, and it's quite harmless to return an error instead.

> > +};
> > +#endif
> > +
> >  #ifndef TARGET_I386
> >  void qmp_rtc_reset_reinjection(Error **errp)
> >  {
> > diff --git a/qmp.c b/qmp.c
> > index b6d531e..884d1ab 100644
> > --- a/qmp.c
> > +++ b/qmp.c
> > @@ -161,22 +161,6 @@ VncInfo2List *qmp_query_vnc_servers(Error **errp)
> >  };
> >  #endif
> >  
> > -#ifndef CONFIG_SPICE
> > -/*
> > - * qmp-commands.hx ensures that QMP command query-spice exists only
> > - * #ifdef CONFIG_SPICE.  Necessary for an accurate query-commands
> > - * result.  However, the QAPI schema is blissfully unaware of that,
> > - * and the QAPI code generator happily generates a dead
> > - * qmp_marshal_query_spice() that calls qmp_query_spice().  Provide it
> > - * one, or else linking fails.  FIXME Educate the QAPI schema on
> > - * CONFIG_SPICE.
> > - */
> > -SpiceInfo *qmp_query_spice(Error **errp)
> > -{
> > -    abort();
> > -};
> > -#endif
> > -
> >  void qmp_cont(Error **errp)
> >  {
> >      Error *local_err = NULL;
>