ui/clipboard: add vmstate_cbinfo

Add a VMStateDescriptor for QemuClipboardInfo.

Each clipboard owner will have to save its QemuClipboardInfo and
reregister its owned clipboard after loading. (the global cbinfo has
only pointers to owners, so it can't restore the relation with its owner
if it was to handle migration)

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>

include/ui/clipboard.h

@@ -2,6 +2,7 @@
 #define QEMU_CLIPBOARD_H
 
 #include "qemu/notify.h"
+#include "migration/vmstate.h"
 
 /**
  * DOC: Introduction
@@ -27,6 +28,8 @@ typedef struct QemuClipboardNotify QemuClipboardNotify;
 typedef struct QemuClipboardInfo QemuClipboardInfo;
 typedef struct QemuClipboardContent QemuClipboardContent;
 
+extern const VMStateDescription vmstate_cbinfo;
+
 /**
  * enum QemuClipboardType
  *

ui/clipboard.c

@@ -7,6 +7,32 @@ static NotifierList clipboard_notifiers =
 
 static QemuClipboardInfo *cbinfo[QEMU_CLIPBOARD_SELECTION__COUNT];
 
+static const VMStateDescription vmstate_cbcontent = {
+    .name = "clipboard/content",
+    .version_id = 0,
+    .minimum_version_id = 0,
+    .fields = (const VMStateField[]) {
+        VMSTATE_BOOL(available, QemuClipboardContent),
+        VMSTATE_BOOL(requested, QemuClipboardContent),
+        VMSTATE_UINT32(size, QemuClipboardContent),
+        VMSTATE_VBUFFER_ALLOC_UINT32(data, QemuClipboardContent, 0, 0, size),
+        VMSTATE_END_OF_LIST()
+    }
+};
+
+const VMStateDescription vmstate_cbinfo = {
+    .name = "clipboard",
+    .version_id = 0,
+    .minimum_version_id = 0,
+    .fields = (const VMStateField[]) {
+        VMSTATE_INT32(selection, QemuClipboardInfo),
+        VMSTATE_BOOL(has_serial, QemuClipboardInfo),
+        VMSTATE_UINT32(serial, QemuClipboardInfo),
+        VMSTATE_STRUCT_ARRAY(types, QemuClipboardInfo, QEMU_CLIPBOARD_TYPE__COUNT, 0, vmstate_cbcontent, QemuClipboardContent),
+        VMSTATE_END_OF_LIST()
+    }
+};
+
 void qemu_clipboard_peer_register(QemuClipboardPeer *peer)
 {
     notifier_list_add(&clipboard_notifiers, &peer->notifier);