krunkit: Disable offloading by default

Future krunkit provides unixgram socket option supporting offloading
argument to enable of disable offloading. This is a minimal change to
test this option.

Depends on:
- libkrun/krunkit#63

Author: nirs

example

@@ -22,9 +22,7 @@ CONNECTION_AUTO = {
 
 VMNET_OFFLOAD_AUTO = {
     "vfkit": "off",
-    # libkrun enables offloading features by default, so we must enable vmnet
-    # offloading.  See https://github.com/containers/libkrun/issues/264
-    "krunkit": "on",
+    "krunkit": "off",
     "qemu": "off",
 }
 

vmnet/vm.py

@@ -42,6 +42,7 @@ def __init__(self, args, mac_address, fd=None, socket=None, client=None):
         self.memory = args.memory
         self.distro = args.distro
         self.serial = store.vm_path(self.vm_name, "serial.log")
+        self.vmnet_offload = args.vmnet_offload
 
         # Running info
         self.disk = None
@@ -181,7 +182,7 @@ def krunkit_command(self):
             f"--restful-uri=none://",
             f"--device=virtio-blk,path={self.disk['image']}",
             f"--device=virtio-blk,path={self.cidata}",
-            f"--device=virtio-net,unixSocketPath={self.socket},mac={self.mac_address}",
+            f"--device=virtio-net,type=unixgram,path={self.socket},mac={self.mac_address},offloading={self.vmnet_offload}",
             f"--device=virtio-serial,logFilePath={self.serial}",
             "--krun-log-level=3",
         ]