virt-manager: connect with openGraphicsFD

This allows to connect to VM without any display listening socket, the
fd passing is done through libvirt connection.

Furthermore, since it uses unix socket, spice can use virgl locally
with texture sharing. This effectively enables spice-gtk to display
local virgl rendering.

Signed-off-by: Marc-André Lureau <marcandre.lureau@gmail.com>

virtManager/console.py

@@ -621,7 +621,7 @@ class vmmConsolePages(vmmGObjectUI):
             gdevs = self.vm.get_graphics_devices()
             gdev = gdevs and gdevs[0] or None
             if gdev:
-                ginfo = ConnectionInfo(self.vm.conn, gdev)
+                ginfo = ConnectionInfo(self.vm, gdev)
         except Exception, e:
             # We can fail here if VM is destroyed: xen is a bit racy
             # and can't handle domain lookups that soon after

virtManager/domain.py

@@ -1116,6 +1116,9 @@ class vmmDomain(vmmLibvirtObject):
     def open_console(self, devname, stream, flags=0):
         return self._backend.openConsole(devname, stream, flags)
 
+    def open_graphics_fd(self):
+        return self._backend.openGraphicsFD(0)
+
     def refresh_snapshots(self):
         self._snapshot_list = None
 

virtManager/sshtunnels.py

@@ -32,7 +32,9 @@ class ConnectionInfo(object):
     """
     Holds all the bits needed to make a connection to a graphical console
     """
-    def __init__(self, conn, gdev):
+    def __init__(self, vm, gdev):
+        conn = vm.conn
+        self.vm = vm
         self.gtype      = gdev.type
         self.gport      = gdev.port and str(gdev.port) or None
         self.gsocket    = gdev.socket
@@ -47,6 +49,9 @@ class ConnectionInfo(object):
         if self._connhost == "localhost":
             self._connhost = "127.0.0.1"
 
+    def get_conn_fd(self):
+        return self.vm.open_graphics_fd()
+
     def _is_listen_localhost(self, host=None):
         try:
             return ipaddr.IPNetwork(host or self.gaddr).is_loopback

virtManager/viewers.py

@@ -133,6 +133,10 @@ class Viewer(vmmGObject):
     def _open(self):
         if self._ginfo.need_tunnel():
             self._open_fd(self._tunnels.open_new())
+            return
+        connfd = self._ginfo.get_conn_fd()
+        if connfd != -1:
+            self._open_fd(connfd)
         else:
             self._open_host()
 
@@ -545,6 +549,11 @@ class SpiceViewer(Viewer):
         self._tunnels.unlock()
 
     def _channel_open_fd_request(self, channel, tls_ignore):
+        if not self._ginfo.need_tunnel():
+            connfd = self._ginfo.get_conn_fd()
+            channel.open_fd(connfd)
+            return
+
         if not self._tunnels:
             # Can happen if we close the details window and clear self._tunnels
             # while initially connecting to spice and channel FD requests