admin: Add virAdmHello function

Just one of the simplest functions that returns string "Clients: X"
where X is the number of connected clients to daemon's first
subserver (the original one), so it can be tested using virsh, ipython,
etc.

The subserver is gathered by incrementing its reference
counter (similarly to getting qemu capabilities), so there is no
deadlock with admin subserver in this API.

Here you can see how functions should be named in the client (virAdm*)
and server (adm*).

There is also a parameter @flags that must be 0, which helps testing
proper error propagation into the client.

Signed-off-by: Martin Kletzander <mkletzan@redhat.com>

1 files changed, 15 insertions, 1 deletions

diff --git a/src/admin/admin_protocol.x b/src/admin/admin_protocol.x
index 1a2e94ee86..70954ccb87 100644
--- a/src/admin/admin_protocol.x
+++ b/src/admin/admin_protocol.x
@@ -43,6 +43,15 @@ struct admin_connect_open_args {
     unsigned int flags;
 };
 
+struct admin_hello_args {
+    unsigned int flags;
+};
+
+struct admin_hello_ret {
+    admin_string greeting;
+};
+
+
 /* Define the program number, protocol version and procedure numbers here. */
 const ADMIN_PROGRAM = 0x06900690;
 const ADMIN_PROTOCOL_VERSION = 1;
@@ -73,5 +82,10 @@ enum admin_procedure {
     /**
      * @generate: client
      */
-    ADMIN_PROC_CONNECT_CLOSE = 2
+    ADMIN_PROC_CONNECT_CLOSE = 2,
+
+    /**
+     * @generate: both
+     */
+    ADMIN_PROC_HELLO = 3
 };