conf: Introduce virDomainGraphics-related helpers

A few simple helpers that allow us to determine whether a graphics can
and will need to make use of a DRM render node.

Signed-off-by: Erik Skultety <eskultet@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>

src/conf/domain_conf.c

@@ -30933,3 +30933,46 @@ virDomainGraphicsDefHasOpenGL(const virDomainDef *def)
 
     return false;
 }
+
+
+bool
+virDomainGraphicsSupportsRenderNode(const virDomainGraphicsDef *graphics)
+{
+    return graphics->type == VIR_DOMAIN_GRAPHICS_TYPE_SPICE;
+}
+
+
+const char *
+virDomainGraphicsGetRenderNode(const virDomainGraphicsDef *graphics)
+{
+    const char *ret = NULL;
+
+    switch (graphics->type) {
+    case VIR_DOMAIN_GRAPHICS_TYPE_SPICE:
+        if (graphics->data.spice.gl == VIR_TRISTATE_BOOL_YES)
+            ret = graphics->data.spice.rendernode;
+        break;
+    case VIR_DOMAIN_GRAPHICS_TYPE_EGL_HEADLESS:
+    case VIR_DOMAIN_GRAPHICS_TYPE_SDL:
+    case VIR_DOMAIN_GRAPHICS_TYPE_VNC:
+    case VIR_DOMAIN_GRAPHICS_TYPE_RDP:
+    case VIR_DOMAIN_GRAPHICS_TYPE_DESKTOP:
+    case VIR_DOMAIN_GRAPHICS_TYPE_LAST:
+        break;
+    }
+
+    return ret;
+}
+
+
+bool
+virDomainGraphicsNeedsAutoRenderNode(const virDomainGraphicsDef *graphics)
+{
+    if (!virDomainGraphicsSupportsRenderNode(graphics))
+        return false;
+
+    if (virDomainGraphicsGetRenderNode(graphics))
+        return false;
+
+    return true;
+}

src/conf/domain_conf.h

@@ -3668,4 +3668,13 @@ virDomainDefHasManagedPR(const virDomainDef *def);
 bool
 virDomainGraphicsDefHasOpenGL(const virDomainDef *def);
 
+bool
+virDomainGraphicsSupportsRenderNode(const virDomainGraphicsDef *graphics);
+
+const char *
+virDomainGraphicsGetRenderNode(const virDomainGraphicsDef *graphics);
+
+bool
+virDomainGraphicsNeedsAutoRenderNode(const virDomainGraphicsDef *graphics);
+
 #endif /* __DOMAIN_CONF_H */

src/libvirt_private.syms

@@ -372,8 +372,10 @@ virDomainGraphicsAuthConnectedTypeToString;
 virDomainGraphicsDefFree;
 virDomainGraphicsDefHasOpenGL;
 virDomainGraphicsGetListen;
+virDomainGraphicsGetRenderNode;
 virDomainGraphicsListenAppendAddress;
 virDomainGraphicsListenAppendSocket;
+virDomainGraphicsNeedsAutoRenderNode;
 virDomainGraphicsSpiceChannelModeTypeFromString;
 virDomainGraphicsSpiceChannelModeTypeToString;
 virDomainGraphicsSpiceChannelNameTypeFromString;
@@ -388,6 +390,7 @@ virDomainGraphicsSpiceStreamingModeTypeFromString;
 virDomainGraphicsSpiceStreamingModeTypeToString;
 virDomainGraphicsSpiceZlibCompressionTypeFromString;
 virDomainGraphicsSpiceZlibCompressionTypeToString;
+virDomainGraphicsSupportsRenderNode;
 virDomainGraphicsTypeFromString;
 virDomainGraphicsTypeToString;
 virDomainGraphicsVNCSharePolicyTypeFromString;