qdev: Base object creation on QDict rather than QemuOpts

QDicts are both what QMP natively uses and what the keyval parser
produces. Going through QemuOpts isn't useful for either one, so switch
the main device creation function to QDicts. By sharing more code with
the -object/object-add code path, we can even reduce the code size a
bit.

This commit doesn't remove the detour through QemuOpts from any code
path yet, but it allows the following commits to do so.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20211008133442.141332-15-kwolf@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Tested-by: Peter Krempa <pkrempa@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

3 files changed, 11 insertions, 6 deletions

diff --git a/include/hw/qdev-core.h b/include/hw/qdev-core.h
index 74d8b61..1bad070 100644
--- a/include/hw/qdev-core.h
+++ b/include/hw/qdev-core.h
@@ -180,7 +180,7 @@ struct DeviceState {
     char *canonical_path;
     bool realized;
     bool pending_deleted_event;
-    QemuOpts *opts;
+    QDict *opts;
     int hotplugged;
     bool allow_unplug_during_migration;
     BusState *parent_bus;
@@ -205,8 +205,8 @@ struct DeviceListener {
      * On errors, it returns false and errp is set. Device creation
      * should fail in this case.
      */
-    bool (*hide_device)(DeviceListener *listener, QemuOpts *device_opts,
-                        Error **errp);
+    bool (*hide_device)(DeviceListener *listener, const QDict *device_opts,
+                        bool from_json, Error **errp);
     QTAILQ_ENTRY(DeviceListener) link;
 };
 
@@ -835,13 +835,15 @@ void device_listener_unregister(DeviceListener *listener);
 
 /**
  * @qdev_should_hide_device:
- * @opts: QemuOpts as passed on cmdline.
+ * @opts: options QDict
+ * @from_json: true if @opts entries are typed, false for all strings
+ * @errp: pointer to error object
  *
  * Check if a device should be added.
  * When a device is added via qdev_device_add() this will be called,
  * and return if the device should be added now or not.
  */
-bool qdev_should_hide_device(QemuOpts *opts, Error **errp);
+bool qdev_should_hide_device(const QDict *opts, bool from_json, Error **errp);
 
 typedef enum MachineInitPhase {
     /* current_machine is NULL.  */
diff --git a/include/hw/virtio/virtio-net.h b/include/hw/virtio/virtio-net.h
index d118c95..74a10eb 100644
--- a/include/hw/virtio/virtio-net.h
+++ b/include/hw/virtio/virtio-net.h
@@ -209,7 +209,8 @@ struct VirtIONet {
     bool failover_primary_hidden;
     bool failover;
     DeviceListener primary_listener;
-    QemuOpts *primary_opts;
+    QDict *primary_opts;
+    bool primary_opts_from_json;
     Notifier migration_state;
     VirtioNetRssData rss_data;
     struct NetRxPkt *rx_pkt;
diff --git a/include/monitor/qdev.h b/include/monitor/qdev.h
index 74e6c55..1d57bf6 100644
--- a/include/monitor/qdev.h
+++ b/include/monitor/qdev.h
@@ -9,6 +9,8 @@ void qmp_device_add(QDict *qdict, QObject **ret_data, Error **errp);
 
 int qdev_device_help(QemuOpts *opts);
 DeviceState *qdev_device_add(QemuOpts *opts, Error **errp);
+DeviceState *qdev_device_add_from_qdict(const QDict *opts,
+                                        bool from_json, Error **errp);
 
 /**
  * qdev_set_id: parent the device and set its id if provided.