On Wed, Nov 19, 2025 at 06:54:25PM +0100, Roman Bogorodskiy wrote:
Introduce an optional 'wait' attribute for 'VNC'.
When set to 'yes', VM should only boot upon the initiation of a VNC
connection.

Signed-off-by: Roman Bogorodskiy <[email protected]>
---
src/conf/domain_conf.c            | 11 +++++++++++
src/conf/domain_conf.h            |  1 +
src/conf/schemas/domaincommon.rng |  5 +++++
3 files changed, 17 insertions(+)

diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index d2dea6952e..36cc1916d0 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -11891,6 +11891,7 @@ virDomainGraphicsDefParseXMLVNC(virDomainGraphicsDef 
*def,
    xmlNodePtr audioNode;
    virTristateBool autoport;
    virTristateBool websocketGenerated;
+    virTristateBool wait;
    VIR_XPATH_NODE_AUTORESTORE(ctxt)

    if (virDomainGraphicsListensParseXML(def, node, ctxt, flags) < 0)
@@ -11940,6 +11941,12 @@ virDomainGraphicsDefParseXMLVNC(virDomainGraphicsDef 
*def,

    def->data.vnc.keymap = virXMLPropString(node, "keymap");

+    if (virXMLPropTristateBool(node, "wait", VIR_XML_PROP_NONE,
+                               &wait) < 0)
+        return -1;
+
+    virTristateBoolToBool(wait, &def->data.vnc.wait);
+

def->data.vnc.wait is a bool, yes

    ctxt->node = node;
    audioNode = virXPathNode("./audio", ctxt);
    if (audioNode) {
@@ -27213,6 +27220,10 @@ virDomainGraphicsDefFormatVNC(virBuffer *attrBuf,
            virBufferAsprintf(attrBuf, " websocketGenerated='%s'",
                              def->data.vnc.websocketGenerated ? "yes" : "no");

+        if (def->data.vnc.wait != VIR_TRISTATE_BOOL_ABSENT)
+            virBufferAsprintf(attrBuf, " wait='%s'",
+                              virTristateBoolTypeToString(def->data.vnc.wait));

But then you are treating it here as virTristateBool again.

+
        virDomainGraphicsListenDefFormatAddr(attrBuf, glisten, flags);
        break;
    case VIR_DOMAIN_GRAPHICS_LISTEN_TYPE_NONE:
diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h
index 11eb46ae53..e47e10c90c 100644
--- a/src/conf/domain_conf.h
+++ b/src/conf/domain_conf.h
@@ -2048,6 +2048,7 @@ struct _virDomainGraphicsDef {
            virDomainGraphicsVNCSharePolicy sharePolicy;
            virTristateBool powerControl;
            unsigned int audioId;
+            bool wait;

I would suggest changing this to `virTristateBool wait;`, dropping the
temporary @wait variable in the first hunk and just stick the value
directly here when parsing.  The current behaviour means you will lose
any `wait="no"` in the parsed XML output (see PATCH 2/2, file
tests/bhyvexml2xmloutdata/bhyvexml2xmlout-vnc-wait-no.xml where it
disappears), and my suggestion keeps it around.

With that one change (and tests adjusted):

Reviewed-by: Martin Kletzander <[email protected]>

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