spice: wire up monitor in QemuSpiceOps.

Rename qmp_query_spice() to qmp_query_spice_real(), add to QemuSpiceOps.

Add new qmp_query_spice() function which calls the real function via
QemuSpiceOps if available, otherwise return SpiceInfo.enabled = false.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-id: 20201019075224.14803-9-kraxel@redhat.com

include/ui/qemu-spice-module.h

@@ -22,6 +22,8 @@
 #include <spice.h>
 #endif
 
+typedef struct SpiceInfo SpiceInfo;
+
 struct QemuSpiceOps {
     void (*init)(void);
     void (*display_init)(void);
@@ -32,6 +34,7 @@ struct QemuSpiceOps {
     int (*display_add_client)(int csock, int skipauth, int tls);
 #ifdef CONFIG_SPICE
     int (*add_interface)(SpiceBaseInstance *sin);
+    SpiceInfo* (*qmp_query)(Error **errp);
 #endif
 };
 

ui/spice-core.c

@@ -502,7 +502,7 @@ static QemuOptsList qemu_spice_opts = {
     },
 };
 
-SpiceInfo *qmp_query_spice(Error **errp)
+static SpiceInfo *qmp_query_spice_real(Error **errp)
 {
     QemuOpts *opts = QTAILQ_FIRST(&qemu_spice_opts.head);
     int port, tls_port;
@@ -1001,6 +1001,7 @@ static struct QemuSpiceOps real_spice_ops = {
     .set_pw_expire = qemu_spice_set_pw_expire,
     .display_add_client = qemu_spice_display_add_client,
     .add_interface = qemu_spice_add_interface,
+    .qmp_query = qmp_query_spice_real,
 };
 
 static void spice_register_config(void)

ui/spice-module.c

@@ -19,6 +19,9 @@
 
 #include "qemu/osdep.h"
 #include "qemu/error-report.h"
+#include "qapi/error.h"
+#include "qapi/qapi-types-ui.h"
+#include "qapi/qapi-commands-ui.h"
 #include "ui/qemu-spice-module.h"
 
 int using_spice;
@@ -66,3 +69,17 @@ struct QemuSpiceOps qemu_spice = {
     .set_pw_expire = qemu_spice_set_pw_expire_stub,
     .display_add_client = qemu_spice_display_add_client_stub,
 };
+
+#ifdef CONFIG_SPICE
+
+SpiceInfo *qmp_query_spice(Error **errp)
+{
+    if (!qemu_spice.qmp_query) {
+        SpiceInfo *info = g_new0(SpiceInfo, 1);
+        info->enabled = false;
+        return info;
+    }
+    return qemu_spice.qmp_query(errp);
+}
+
+#endif