Re: [PATCH v2 05/21] qemu: fall-through for unsupported graphics

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Hi

On Fri, Mar 7, 2025 at 3:58 PM Martin Kletzander <mkletzan@xxxxxxxxxx> wrote:
>
> On Tue, Feb 18, 2025 at 02:16:10PM +0400, marcandre.lureau@xxxxxxxxxx wrote:
> >From: Marc-André Lureau <marcandre.lureau@xxxxxxxxxx>
> >
> >Without an error message, it can be tedious to figure out failure to
> >start, just fall-through the generic range error.
> >
> >Signed-off-by: Marc-André Lureau <marcandre.lureau@xxxxxxxxxx>
> >---
> > src/qemu/qemu_command.c | 1 -
> > 1 file changed, 1 deletion(-)
> >
> >diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
> >index 54130ac4f0..772e98fbb4 100644
> >--- a/src/qemu/qemu_command.c
> >+++ b/src/qemu/qemu_command.c
> >@@ -8448,7 +8448,6 @@ qemuBuildGraphicsCommandLine(virQEMUDriverConfig *cfg,
> >             break;
> >         case VIR_DOMAIN_GRAPHICS_TYPE_RDP:
> >         case VIR_DOMAIN_GRAPHICS_TYPE_DESKTOP:
> >-            return -1;
>
> You're right that we're missing an error message here, but
>
> >         case VIR_DOMAIN_GRAPHICS_TYPE_LAST:
> >         default:
> >             virReportEnumRangeError(virDomainGraphicsType, graphics->type);
>
> This reports an error that corresponds to a completely invalid value
> provided in the internal code as an error in the code.  I would be fine
> with it if the validation function qemuValidateDomainDeviceDefGraphics()
> threw an error for anyone requesting such an unsupported configuration,
> but that does not.  We should either add it there or just add a proper
> error message here.  It is not possible to trigger now unless someone is
> adding a previously unsupported graphics type, but still, would be nice
> to lead by an example.

I'll drop this patch.




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