From f895d23743a65141a2db7f816e56d18c9c4de6df Mon Sep 17 00:00:00 2001
Message-Id: <f895d23743a65141a2db7f816e56d18c9c4de6df@dist-git>
From: Michal Privoznik <mprivozn@redhat.com>
Date: Mon, 30 Jan 2023 10:55:22 +0100
Subject: [PATCH] virsh: Make domif-setlink work more than once
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In virsh, we have this convenient domif-setlink command, which is
just a wrapper over virDomainUpdateDeviceFlags() and which allows
setting link state of given guest NIC. It does so by fetching
corresponding <interface/> XML snippet and either putting <link
state=''/> into it, OR if the element already exists setting the
attribute to desired value. The XML is then fed into the update
API.

There's, however, a small bug in detecting the pre-existence of
the element and its attribute. The code looks at "link"
attribute, while in fact, the attribute is called "state".

Resolves: https://gitlab.com/libvirt/libvirt/-/issues/426
Fixes: e575bf082ed4889280be07c986375f1ca15bb7ee
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
(cherry picked from commit 6f3f6c0f763b9ffd8ef93eb124c88dd0b79138fc)
https://bugzilla.redhat.com/show_bug.cgi?id=2165466
---
 tools/virsh-domain.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/virsh-domain.c b/tools/virsh-domain.c
index 6b431bd1e5..59b2b3ce60 100644
--- a/tools/virsh-domain.c
+++ b/tools/virsh-domain.c
@@ -3209,7 +3209,7 @@ cmdDomIfSetLink(vshControl *ctl, const vshCmd *cmd)
         }
     }
 
-    if (xmlHasProp(linkNode, BAD_CAST "link"))
+    if (xmlHasProp(linkNode, BAD_CAST "state"))
         stateAttr = xmlSetProp(linkNode, BAD_CAST "state", BAD_CAST state);
     else
         stateAttr = xmlNewProp(linkNode, BAD_CAST "state", BAD_CAST state);
-- 
2.39.1