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qom: Allow optional sugar props

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Global properties have an @optional field, which allows to apply a given
property to a given type even if one of its subclasses doesn't support
it. This is especially used in the compat code when dealing with the
"disable-modern" and "disable-legacy" properties and the "virtio-pci"
type.

Allow object_register_sugar_prop() to set this field as well.

Signed-off-by: Greg Kurz <groug@kaod.org>
Message-Id: <159738953558.377274.16617742952571083440.stgit@bahia.lan>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
This commit is contained in:
Greg Kurz
2020-08-14 09:24:50 +02:00
committed by David Gibson
parent 5b19cb63d9
commit a8dc82ce82
4 changed files with 18 additions and 9 deletions
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4
qom/object.c
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@ -442,7 +442,8 @@ static GPtrArray *object_compat_props[3];
* other than "-global". These are generally used for syntactic
* sugar and legacy command line options.
*/
void object_register_sugar_prop(const char *driver, const char *prop, const char *value)
void object_register_sugar_prop(const char *driver, const char *prop,
const char *value, bool optional)
{
GlobalProperty *g;
if (!object_compat_props[2]) {
@ -452,6 +453,7 @@ void object_register_sugar_prop(const char *driver, const char *prop, const char
g->driver = g_strdup(driver);
g->property = g_strdup(prop);
g->value = g_strdup(value);
g->optional = optional;
g_ptr_array_add(object_compat_props[2], g);
}