Re: [libvirt PATCH] conf: Restrict use of <portForward> to the passt backend

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On Tue, Apr 18, 2023 at 03:43:41PM +0200, Ján Tomko wrote:
> On a Tuesday in 2023, Andrea Bolognani wrote:
> > On Tue, Apr 18, 2023 at 03:19:45PM +0200, Ján Tomko wrote:
> > > On a Tuesday in 2023, Andrea Bolognani wrote:
> > > > That's already the case in practice, but it's a better
> > > > experience for the user if we reject this configuration
> > > > outright instead of silently ignoring part of it.
> > > >
> > > > Signed-off-by: Andrea Bolognani <abologna@xxxxxxxxxx>
> > > > ---
> > > > src/conf/domain_validate.c                    |  9 +++++++++
> > > > ...t-user-slirp-portforward.x86_64-latest.err |  1 +
> > > > .../net-user-slirp-portforward.xml            | 20 +++++++++++++++++++
> > > > tests/qemuxml2argvtest.c                      |  1 +
> > > > 4 files changed, 31 insertions(+)
> > > > create mode 100644 tests/qemuxml2argvdata/net-user-slirp-portforward.x86_64-latest.err
> > > > create mode 100644 tests/qemuxml2argvdata/net-user-slirp-portforward.xml
> > >
> > > Reviewed-by: Ján Tomko <jtomko@xxxxxxxxxx>
> >
> > Thanks for the review!
> >
> > Right before pushing, I realized that VIR_ERR_INTERNAL_ERROR is
> > probably not the best fit for this scenario. Are you okay with me
> > squashing in the changes below?
>
> Yes.
>
>     VIR_ERR_CONFIG_UNSUPPORTED = 67,    /* unsupported configuration
>                                            construct (Since: 0.7.3) */
>
> We also use VIR_ERR_XML_ERROR in similar cases,
> but I'm not sure whether it's more fitting, given its description:
>
>     VIR_ERR_XML_ERROR = 27,             /* an XML description is not well
>                                            formed or broken (Since: 0.1.1) */

Yeah, not quite clear-cut, but XML_ERROR seems more suitable for a
situation where the XML is structurally incorrect (e.g. <disk> nested
inside <interface> or something like that) as opposed to simply
trying to enable a set of features that don't work well together.

I'll stick with CONFIG_UNSUPPORTED.

-- 
Andrea Bolognani / Red Hat / Virtualization





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