Merge remote-tracking branch 'remotes/afaerber/tags/qom-devices-for-peter' into staging

QOM infrastructure fixes and device conversions

* Cleanups for recursive device unrealization

# gpg: Signature made Thu 04 Sep 2014 18:17:35 BST using RSA key ID 3E7E013F
# gpg: Good signature from "Andreas Färber <afaerber@suse.de>"
# gpg:                 aka "Andreas Färber <afaerber@suse.com>"

* remotes/afaerber/tags/qom-devices-for-peter:
  qdev: Add cleanup logic in device_set_realized() to avoid resource leak
  qdev: Use NULL instead of local_err for qbus_child unrealize
  qdev: Use error_abort instead of using local_err
  memory: Remove object_property_add_child_array()
  qom: Add automatic arrayification to object_property_add()
  machine: Clean up -machine handling
  qom: Make object_child_foreach() safe for objects removal

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

4 files changed, 79 insertions, 54 deletions

diff --git a/hw/core/qdev.c b/hw/core/qdev.c
index da1ba48c99..fcb16383a1 100644
--- a/hw/core/qdev.c
+++ b/hw/core/qdev.c
@@ -820,13 +820,13 @@ static void device_set_realized(Object *obj, bool value, Error **errp)
     }
 
     if (value && !dev->realized) {
-        if (!obj->parent && local_err == NULL) {
+        if (!obj->parent) {
             static int unattached_count;
             gchar *name = g_strdup_printf("device[%d]", unattached_count++);
 
             object_property_add_child(container_get(qdev_get_machine(),
                                                     "/unattached"),
-                                      name, obj, &local_err);
+                                      name, obj, &error_abort);
             g_free(name);
         }
 
@@ -834,12 +834,14 @@ static void device_set_realized(Object *obj, bool value, Error **errp)
             dc->realize(dev, &local_err);
         }
 
-        if (dev->parent_bus && dev->parent_bus->hotplug_handler &&
-            local_err == NULL) {
+        if (local_err != NULL) {
+            goto fail;
+        }
+
+        if (dev->parent_bus && dev->parent_bus->hotplug_handler) {
             hotplug_handler_plug(dev->parent_bus->hotplug_handler,
                                  dev, &local_err);
-        } else if (local_err == NULL &&
-                   object_dynamic_cast(qdev_get_machine(), TYPE_MACHINE)) {
+        } else if (object_dynamic_cast(qdev_get_machine(), TYPE_MACHINE)) {
             HotplugHandler *hotplug_ctrl;
             MachineState *machine = MACHINE(qdev_get_machine());
             MachineClass *mc = MACHINE_GET_CLASS(machine);
@@ -852,47 +854,69 @@ static void device_set_realized(Object *obj, bool value, Error **errp)
             }
         }
 
-        if (qdev_get_vmsd(dev) && local_err == NULL) {
+        if (local_err != NULL) {
+            goto post_realize_fail;
+        }
+
+        if (qdev_get_vmsd(dev)) {
             vmstate_register_with_alias_id(dev, -1, qdev_get_vmsd(dev), dev,
                                            dev->instance_id_alias,
                                            dev->alias_required_for_version);
         }
-        if (local_err == NULL) {
-            QLIST_FOREACH(bus, &dev->child_bus, sibling) {
-                object_property_set_bool(OBJECT(bus), true, "realized",
+
+        QLIST_FOREACH(bus, &dev->child_bus, sibling) {
+            object_property_set_bool(OBJECT(bus), true, "realized",
                                          &local_err);
-                if (local_err != NULL) {
-                    break;
-                }
+            if (local_err != NULL) {
+                goto child_realize_fail;
             }
         }
-        if (dev->hotplugged && local_err == NULL) {
+        if (dev->hotplugged) {
             device_reset(dev);
         }
         dev->pending_deleted_event = false;
     } else if (!value && dev->realized) {
+        Error **local_errp = NULL;
         QLIST_FOREACH(bus, &dev->child_bus, sibling) {
+            local_errp = local_err ? NULL : &local_err;
             object_property_set_bool(OBJECT(bus), false, "realized",
-                                     &local_err);
-            if (local_err != NULL) {
-                break;
-            }
+                                     local_errp);
         }
-        if (qdev_get_vmsd(dev) && local_err == NULL) {
+        if (qdev_get_vmsd(dev)) {
             vmstate_unregister(dev, qdev_get_vmsd(dev), dev);
         }
-        if (dc->unrealize && local_err == NULL) {
-            dc->unrealize(dev, &local_err);
+        if (dc->unrealize) {
+            local_errp = local_err ? NULL : &local_err;
+            dc->unrealize(dev, local_errp);
         }
         dev->pending_deleted_event = true;
     }
 
     if (local_err != NULL) {
-        error_propagate(errp, local_err);
-        return;
+        goto fail;
     }
 
     dev->realized = value;
+    return;
+
+child_realize_fail:
+    QLIST_FOREACH(bus, &dev->child_bus, sibling) {
+        object_property_set_bool(OBJECT(bus), false, "realized",
+                                 NULL);
+    }
+
+    if (qdev_get_vmsd(dev)) {
+        vmstate_unregister(dev, qdev_get_vmsd(dev), dev);
+    }
+
+post_realize_fail:
+    if (dc->unrealize) {
+        dc->unrealize(dev, NULL);
+    }
+
+fail:
+    error_propagate(errp, local_err);
+    return;
 }
 
 static bool device_get_hotpluggable(Object *obj, Error **errp)
diff --git a/memory.c b/memory.c
index ef0be1c3aa..1bae951df7 100644
--- a/memory.c
+++ b/memory.c
@@ -876,30 +876,6 @@ static char *memory_region_escape_name(const char *name)
     return escaped;
 }
 
-static void object_property_add_child_array(Object *owner,
-                                            const char *name,
-                                            Object *child)
-{
-    int i;
-    char *base_name = memory_region_escape_name(name);
-
-    for (i = 0; ; i++) {
-        char *full_name = g_strdup_printf("%s[%d]", base_name, i);
-        Error *local_err = NULL;
-
-        object_property_add_child(owner, full_name, child, &local_err);
-        g_free(full_name);
-        if (!local_err) {
-            break;
-        }
-
-        error_free(local_err);
-    }
-
-    g_free(base_name);
-}
-        
-
 void memory_region_init(MemoryRegion *mr,
                         Object *owner,
                         const char *name,
@@ -917,8 +893,12 @@ void memory_region_init(MemoryRegion *mr,
     mr->name = g_strdup(name);
 
     if (name) {
-        object_property_add_child_array(owner, name, OBJECT(mr));
+        char *escaped_name = memory_region_escape_name(name);
+        char *name_array = g_strdup_printf("%s[*]", escaped_name);
+        object_property_add_child(owner, name_array, OBJECT(mr), &error_abort);
         object_unref(OBJECT(mr));
+        g_free(name_array);
+        g_free(escaped_name);
     }
 }
 
diff --git a/qom/object.c b/qom/object.c
index 79bd0cc474..da0919a3dd 100644
--- a/qom/object.c
+++ b/qom/object.c
@@ -668,10 +668,10 @@ void object_class_foreach(void (*fn)(ObjectClass *klass, void *opaque),
 int object_child_foreach(Object *obj, int (*fn)(Object *child, void *opaque),
                          void *opaque)
 {
-    ObjectProperty *prop;
+    ObjectProperty *prop, *next;
     int ret = 0;
 
-    QTAILQ_FOREACH(prop, &obj->properties, node) {
+    QTAILQ_FOREACH_SAFE(prop, &obj->properties, node, next) {
         if (object_property_is_child(prop)) {
             ret = fn(prop->opaque, opaque);
             if (ret != 0) {
@@ -728,6 +728,27 @@ object_property_add(Object *obj, const char *name, const char *type,
                     void *opaque, Error **errp)
 {
     ObjectProperty *prop;
+    size_t name_len = strlen(name);
+
+    if (name_len >= 3 && !memcmp(name + name_len - 3, "[*]", 4)) {
+        int i;
+        ObjectProperty *ret;
+        char *name_no_array = g_strdup(name);
+
+        name_no_array[name_len - 3] = '\0';
+        for (i = 0; ; ++i) {
+            char *full_name = g_strdup_printf("%s[%d]", name_no_array, i);
+
+            ret = object_property_add(obj, full_name, type, get, set,
+                                      release, opaque, NULL);
+            g_free(full_name);
+            if (ret) {
+                break;
+            }
+        }
+        g_free(name_no_array);
+        return ret;
+    }
 
     QTAILQ_FOREACH(prop, &obj->properties, node) {
         if (strcmp(prop->name, name) == 0) {
diff --git a/vl.c b/vl.c
index a9fd2070e7..9c9acf5e65 100644
--- a/vl.c
+++ b/vl.c
@@ -2841,15 +2841,15 @@ static void free_and_trace(gpointer mem)
     free(mem);
 }
 
-static int object_set_property(const char *name, const char *value, void *opaque)
+static int machine_set_property(const char *name, const char *value,
+                                void *opaque)
 {
     Object *obj = OBJECT(opaque);
     StringInputVisitor *siv;
     Error *local_err = NULL;
     char *c, *qom_name;
 
-    if (strcmp(name, "qom-type") == 0 || strcmp(name, "id") == 0 ||
-        strcmp(name, "type") == 0) {
+    if (strcmp(name, "type") == 0) {
         return 0;
     }
 
@@ -4254,7 +4254,7 @@ int main(int argc, char **argv, char **envp)
     }
 
     machine_opts = qemu_get_machine_opts();
-    if (qemu_opt_foreach(machine_opts, object_set_property, current_machine,
+    if (qemu_opt_foreach(machine_opts, machine_set_property, current_machine,
                          1) < 0) {
         object_unref(OBJECT(current_machine));
         exit(1);