qdev: Move global validation to a single function

Currently GlobalProperty.not_used=false has multiple meanings:

* It may be a property for a hotpluggable device, which may or may not
  have been used by a device;
* It may be a machine-type-provided property, which may or may not have
  been used by a device.
* It may be a user-provided property that was actually not used by
  any device.

Simplify the logic by having two separate fields: 'user_provided' and
'used'. This allows the entire global property validation logic to be
contained in a single function, and allows more specific error messages.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

2 files changed, 23 insertions, 23 deletions

diff --git a/hw/core/qdev-properties-system.c b/hw/core/qdev-properties-system.c
index ae0900f651..84caa1d694 100644
--- a/hw/core/qdev-properties-system.c
+++ b/hw/core/qdev-properties-system.c
@@ -388,28 +388,12 @@ void qdev_set_nic_properties(DeviceState *dev, NICInfo *nd)
 static int qdev_add_one_global(QemuOpts *opts, void *opaque)
 {
     GlobalProperty *g;
-    ObjectClass *oc;
 
     g = g_malloc0(sizeof(*g));
     g->driver   = qemu_opt_get(opts, "driver");
     g->property = qemu_opt_get(opts, "property");
     g->value    = qemu_opt_get(opts, "value");
-    oc = object_class_dynamic_cast(object_class_by_name(g->driver),
-                                   TYPE_DEVICE);
-    if (oc) {
-        DeviceClass *dc = DEVICE_CLASS(oc);
-
-        if (dc->hotpluggable) {
-            /* If hotpluggable then skip not_used checking. */
-            g->not_used = false;
-        } else {
-            /* Maybe a typo. */
-            g->not_used = true;
-        }
-    } else {
-        /* Maybe a typo. */
-        g->not_used = true;
-    }
+    g->user_provided = true;
     qdev_prop_register_global(g);
     return 0;
 }
diff --git a/hw/core/qdev-properties.c b/hw/core/qdev-properties.c
index 9075453f2d..66556d3bf9 100644
--- a/hw/core/qdev-properties.c
+++ b/hw/core/qdev-properties.c
@@ -961,13 +961,29 @@ int qdev_prop_check_globals(void)
     int ret = 0;
 
     QTAILQ_FOREACH(prop, &global_props, next) {
-        if (!prop->not_used) {
+        ObjectClass *oc;
+        DeviceClass *dc;
+        if (prop->used) {
+            continue;
+        }
+        if (!prop->user_provided) {
+            continue;
+        }
+        oc = object_class_by_name(prop->driver);
+        oc = object_class_dynamic_cast(oc, TYPE_DEVICE);
+        if (!oc) {
+            error_report("Warning: global %s.%s has invalid class name",
+                       prop->driver, prop->property);
+            ret = 1;
+            continue;
+        }
+        dc = DEVICE_CLASS(oc);
+        if (!dc->hotpluggable && !prop->used) {
+            error_report("Warning: global %s.%s=%s not used",
+                       prop->driver, prop->property, prop->value);
+            ret = 1;
             continue;
         }
-        ret = 1;
-        error_report("Warning: \"-global %s.%s=%s\" not used",
-                     prop->driver, prop->property, prop->value);
-
     }
     return ret;
 }
@@ -983,7 +999,7 @@ void qdev_prop_set_globals_for_type(DeviceState *dev, const char *typename,
         if (strcmp(typename, prop->driver) != 0) {
             continue;
         }
-        prop->not_used = false;
+        prop->used = true;
         object_property_parse(OBJECT(dev), prop->value, prop->property, &err);
         if (err != NULL) {
             error_propagate(errp, err);