Subject: guest: Query availability of spicevmc channels in domcaps
From: Lin Ma lma@suse.com Thu Nov 10 15:57:24 2022 +0800
Date: Wed Dec 14 12:44:54 2022 -0500:
Git: 180154d752a33f6b26643184e6aa19dcb110e0eb

Signed-off-by: Lin Ma <lma@suse.com>

diff --git a/virtinst/domcapabilities.py b/virtinst/domcapabilities.py
index 91f51f9f..db08bf65 100644
--- a/virtinst/domcapabilities.py
+++ b/virtinst/domcapabilities.py
@@ -114,6 +114,7 @@ class _Devices(_CapsBlock):
     tpm = XMLChildProperty(_make_capsblock("tpm"), is_single=True)
     filesystem = XMLChildProperty(_make_capsblock("filesystem"), is_single=True)
     redirdev = XMLChildProperty(_make_capsblock("redirdev"), is_single=True)
+    channel = XMLChildProperty(_make_capsblock("channel"), is_single=True)
 
 
 class _Features(_CapsBlock):
@@ -449,6 +450,18 @@ class DomainCapabilities(XMLBuilder):
 
         return self.devices.graphics.get_enum("type").has_value("spice")
 
+    def supports_channel_spicevmc(self):
+        """
+        Return False if libvirt explicitly advertises no support for
+        spice channel
+        """
+        if self.devices.channel.supported is None:
+            # Follow the original behavior in case of talking to older
+            # libvirt.
+            return True
+
+        return self.devices.channel.get_enum("type").has_value("spicevmc")
+
     def supports_redirdev_usb(self):
         """
         Return False if libvirt explicitly advertises no support for
diff --git a/virtinst/guest.py b/virtinst/guest.py
index 1d1e2ee9..c2244ae3 100644
--- a/virtinst/guest.py
+++ b/virtinst/guest.py
@@ -1127,6 +1127,8 @@ class Guest(XMLBuilder):
             self.add_device(ctrl)
 
     def _add_spice_channels(self):
+        if not self.lookup_domcaps().supports_channel_spicevmc():
+            return
         if self.skip_default_channel:
             return
         for chn in self.devices.channel: