netdev: add more commands to preconfig mode

Creating and destroying network backend does not require a fully
constructed machine.  Allow the related monitor commands to run before
machine initialization has concluded.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>

hmp-commands.hx

@@ -1269,6 +1269,7 @@ ERST
         .help       = "add host network device",
         .cmd        = hmp_netdev_add,
         .command_completion = netdev_add_completion,
+        .flags      = "p",
     },
 
 SRST
@@ -1283,6 +1284,7 @@ ERST
         .help       = "remove host network device",
         .cmd        = hmp_netdev_del,
         .command_completion = netdev_del_completion,
+        .flags      = "p",
     },
 
 SRST

qapi/net.json

@@ -55,7 +55,8 @@
 # <- { "return": {} }
 #
 ##
-{ 'command': 'netdev_add', 'data': 'Netdev', 'boxed': true }
+{ 'command': 'netdev_add', 'data': 'Netdev', 'boxed': true,
+  'allow-preconfig': true }
 
 ##
 # @netdev_del:
@@ -75,7 +76,8 @@
 # <- { "return": {} }
 #
 ##
-{ 'command': 'netdev_del', 'data': {'id': 'str'} }
+{ 'command': 'netdev_del', 'data': {'id': 'str'},
+  'allow-preconfig': true }
 
 ##
 # @NetLegacyNicOptions: