monitor: Add netdev_add type argument completion.

Also update the command's documentation.
Signed-off-by: NHani Benhabiles <hani@linux.com>
Reviewed-by: NStefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: NLuiz Capitulino <lcapitulino@redhat.com>

hmp-commands.hx

@@ -1234,9 +1234,10 @@ ETEXI
     {
         .name       = "netdev_add",
         .args_type  = "netdev:O",
-        .params     = "[user|tap|socket|hubport|netmap],id=str[,prop=value][,...]",
+        .params     = "[user|tap|socket|vde|bridge|hubport|netmap],id=str[,prop=value][,...]",
         .help       = "add host network device",
         .mhandler.cmd = hmp_netdev_add,
+        .command_completion = netdev_add_completion,
     },
 
 STEXI

hmp.h

@@ -101,5 +101,6 @@ void sendkey_completion(ReadLineState *rs, int nb_args, const char *str);
 void chardev_remove_completion(ReadLineState *rs, int nb_args, const char *str);
 void chardev_add_completion(ReadLineState *rs, int nb_args, const char *str);
 void set_link_completion(ReadLineState *rs, int nb_args, const char *str);
+void netdev_add_completion(ReadLineState *rs, int nb_args, const char *str);
 
 #endif

monitor.c

@@ -4303,6 +4303,21 @@ void chardev_add_completion(ReadLineState *rs, int nb_args, const char *str)
     qapi_free_ChardevBackendInfoList(start);
 }
 
+void netdev_add_completion(ReadLineState *rs, int nb_args, const char *str)
+{
+    size_t len;
+    int i;
+
+    if (nb_args != 2) {
+        return;
+    }
+    len = strlen(str);
+    readline_set_completion_index(rs, len);
+    for (i = 0; NetClientOptionsKind_lookup[i]; i++) {
+        add_completion_option(rs, str, NetClientOptionsKind_lookup[i]);
+    }
+}
+
 void device_add_completion(ReadLineState *rs, int nb_args, const char *str)
 {
     GSList *list, *elt;