[Qemu-devel] [PATCH v2 1/2] Revert "Revert "globals: Allow global properties to be optional""

Dr. David Alan Gilbert (git) posted 2 patches 6 years, 3 months ago
Maintainers: Eduardo Habkost <ehabkost@redhat.com>, Paolo Bonzini <pbonzini@redhat.com>, Gonglei <arei.gonglei@huawei.com>, Marcel Apfelbaum <marcel.apfelbaum@gmail.com>, "Daniel P. Berrangé" <berrange@redhat.com>, Gerd Hoffmann <kraxel@redhat.com>, "Michael S. Tsirkin" <mst@redhat.com>
[Qemu-devel] [PATCH v2 1/2] Revert "Revert "globals: Allow global properties to be optional""
Posted by Dr. David Alan Gilbert (git) 6 years, 3 months ago
From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>

This reverts commit 8fa70dbd8bb478d9483c1da3e9976a2d86b3f9a0.

Because we're about to revert it's neighbour and thus uses an optional
again.

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
---
 include/hw/qdev-core.h | 3 +++
 qom/object.c           | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/include/hw/qdev-core.h b/include/hw/qdev-core.h
index e157fc4acd..136df7774c 100644
--- a/include/hw/qdev-core.h
+++ b/include/hw/qdev-core.h
@@ -252,6 +252,8 @@ struct PropertyInfo {
 /**
  * GlobalProperty:
  * @used: Set to true if property was used when initializing a device.
+ * @optional: If set to true, GlobalProperty will be skipped without errors
+ *            if the property doesn't exist.
  *
  * An error is fatal for non-hotplugged devices, when the global is applied.
  */
@@ -260,6 +262,7 @@ typedef struct GlobalProperty {
     const char *property;
     const char *value;
     bool used;
+    bool optional;
 } GlobalProperty;
 
 static inline void
diff --git a/qom/object.c b/qom/object.c
index 3966a3d461..1555547727 100644
--- a/qom/object.c
+++ b/qom/object.c
@@ -386,6 +386,9 @@ void object_apply_global_props(Object *obj, const GPtrArray *props, Error **errp
         if (object_dynamic_cast(obj, p->driver) == NULL) {
             continue;
         }
+        if (p->optional && !object_property_find(obj, p->property, NULL)) {
+            continue;
+        }
         p->used = true;
         object_property_parse(obj, p->value, p->property, &err);
         if (err != NULL) {
-- 
2.21.0


Re: [Qemu-devel] [PATCH v2 1/2] Revert "Revert "globals: Allow global properties to be optional""
Posted by Daniel P. Berrangé 6 years, 3 months ago
On Mon, Jul 29, 2019 at 05:29:02PM +0100, Dr. David Alan Gilbert (git) wrote:
> From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
> 
> This reverts commit 8fa70dbd8bb478d9483c1da3e9976a2d86b3f9a0.
> 
> Because we're about to revert it's neighbour and thus uses an optional
> again.
> 
> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
> ---
>  include/hw/qdev-core.h | 3 +++
>  qom/object.c           | 3 +++
>  2 files changed, 6 insertions(+)

Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>

Regards,
Daniel
-- 
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Re: [Qemu-devel] [PATCH v2 1/2] Revert "Revert "globals: Allow global properties to be optional""
Posted by Cornelia Huck 6 years, 3 months ago
On Mon, 29 Jul 2019 17:29:02 +0100
"Dr. David Alan Gilbert (git)" <dgilbert@redhat.com> wrote:

> From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
> 
> This reverts commit 8fa70dbd8bb478d9483c1da3e9976a2d86b3f9a0.
> 
> Because we're about to revert it's neighbour and thus uses an optional
> again.
> 
> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
> ---
>  include/hw/qdev-core.h | 3 +++
>  qom/object.c           | 3 +++
>  2 files changed, 6 insertions(+)

As discussed on IRC, the 'bugs' mentioned in that commit were related
to the other patch that is being reverted; so I don't really mind it
for 4.1 (IOW, either of the two revert approaches should be fine.)

Reviewed-by: Cornelia Huck <cohuck@redhat.com>