Add a helper to fetch machine containers. Add some sanity check around.
Signed-off-by: Peter Xu <pet...@redhat.com>
---
include/hw/qdev-core.h | 10 ++++++++++
hw/core/qdev.c | 17 +++++++++++++++++
2 files changed, 27 insertions(+)
diff --git a/include/hw/qdev-core.h b/include/hw/qdev-core.h
index 5be9844412..38edfb1b54 100644
--- a/include/hw/qdev-core.h
+++ b/include/hw/qdev-core.h
@@ -996,6 +996,16 @@ const char *qdev_fw_name(DeviceState *dev);
void qdev_assert_realized_properly(void);
Object *qdev_get_machine(void);
+/**
+ * machine_get_container:
+ * @name: The name of container to lookup
+ *
+ * Get a container of the machine (QOM path "/machine/XXX").
+ *
+ * Returns: the machine container object.
+ */
+Object *machine_get_container(const char *name);
+
/**
* qdev_get_human_name() - Return a human-readable name for a device
* @dev: The device. Must be a valid and non-NULL pointer.
diff --git a/hw/core/qdev.c b/hw/core/qdev.c
index c869c47a27..6cb4fe4691 100644
--- a/hw/core/qdev.c
+++ b/hw/core/qdev.c
@@ -829,6 +829,23 @@ Object *qdev_get_machine(void)
return dev;
}
+Object *machine_get_container(const char *name)
+{
+ Object *container, *machine;
+
+ /*
+ * NOTE: nobody should call this _before_ machine is created. If it
+ * happens, it's a programming error.
+ */
+ machine = qdev_get_machine();
+ assert(machine);
+
+ container = object_resolve_path_component(machine, name);
+ assert(object_dynamic_cast(container, TYPE_CONTAINER));
+
+ return container;
+}
+
char *qdev_get_human_name(DeviceState *dev)
{
g_assert(dev != NULL);
--
2.45.0
