On 02/10/2015 04:35 AM, Luyao Huang wrote:
> https://bugzilla.redhat.com/show_bug.cgi?id=1191016
>
> We try to get the IP address in /domain/devices/graphics/@listen, howerver
> for the network type listen address donnot have this parameter, it will
> show the address in the /domain/devices/graphics/listen/@address, running
> XML like this:
>
> <graphics type='spice' port='5901' autoport='yes' keymap='en-us'>
> <listen type='network' address='192.168.122.1' network='default'/>
> </graphics>
>
> This patch will try to get the IP address in this path
> /domain/devices/graphics/listen/@address
That will work when the libvirtd being connected to is 0.9.4 or later,
but earlier versions of libvirt don't have the <listen> subelement;
instead they just have a 'listen' attribute directly inside <graphics>
that contains the address. All newer versions of libvirt are supposed to
populate that from <listen>[0] for backward compatibility.
The real bug here is that the listen attribute in <graphics> isn't being
filled in in the case of type='network' when the domain is active. On
the other hand, fixing the problem there would leave it unfixed for
cases where the client is a new libvirt but the server is running
libvirt between 0.9.4 and 1.2.12. So I think what is needed is for your
patch to check @listen, and if nothing is found there, *then* check
listen/@address. I attached a patch to this mail that I propose
squashing into your patch before pushing. Let me know if it behaves
properly and looks correct.
Beyond that, the server side should still be fixed. I just sent a patch
that does that:
https://www.redhat.com/archives/libvir-list/2015-February/msg00332.html
Between the two patches, we will have fixed the problem for all versions
of server, as long as the client is new enough.
>From 5f8800d93375ee67dd94bf50a87ed75f44ca2b19 Mon Sep 17 00:00:00 2001
From: Laine Stump <laine@xxxxxxxxx>
Date: Tue, 10 Feb 2015 13:32:33 -0500
Subject: [PATCH] virsh: check listen attribute *and* listen subelement in
domdisplay
This should be squashed into Luyao Huang's patch fixing the output of
virsh domdisplay. Without it, virsh would fail when connecting to a
libvirtd older than 0.9.4.
---
tools/virsh-domain.c | 20 ++++++++++++++++++--
1 file changed, 18 insertions(+), 2 deletions(-)
diff --git a/tools/virsh-domain.c b/tools/virsh-domain.c
index 4a9b574..20bafbe 100644
--- a/tools/virsh-domain.c
+++ b/tools/virsh-domain.c
@@ -1,7 +1,7 @@
/*
* virsh-domain.c: Commands to manage domain
*
- * Copyright (C) 2005, 2007-2014 Red Hat, Inc.
+ * Copyright (C) 2005, 2007-2015 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
@@ -10081,7 +10081,7 @@ cmdDomDisplay(vshControl *ctl, const vshCmd *cmd)
continue;
/* Create our XPATH lookup for the current display's address */
- if (virAsprintf(&xpath, xpath_fmt, scheme[iter], "listen/@address") < 0)
+ if (virAsprintf(&xpath, xpath_fmt, scheme[iter], "@listen") < 0)
goto cleanup;
/* Attempt to get the listening addr if set for the current
@@ -10089,6 +10089,22 @@ cmdDomDisplay(vshControl *ctl, const vshCmd *cmd)
listen_addr = virXPathString(xpath, ctxt);
VIR_FREE(xpath);
+ if (!listen_addr) {
+ /* The subelement address - <listen address='xyz'/> -
+ * *should* have been automatically backfilled into its
+ * parent <graphics listen='xyz'> (which we just tried to
+ * retrieve into listen_addr above) but in some cases it
+ * isn't, so we also do an explicit check for the
+ * subelement (which, by the way, doesn't exist on libvirt
+ * < 0.9.4, so we really do need to check both places)
+ */
+ if (virAsprintf(&xpath, xpath_fmt, scheme[iter], "listen/@address") < 0)
+ goto cleanup;
+
+ listen_addr = virXPathString(xpath, ctxt);
+ VIR_FREE(xpath);
+ }
+
/* We can query this info for all the graphics types since we'll
* get nothing for the unsupported ones (just rdp for now).
* Also the parameter '--include-password' was already taken
--
2.1.0
--
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