During a shutdown/restart cycle libvirtd forgot the macvtap device name
that it had created on behalf of a VM so that a stale macvtap device
remained on the host when the VM terminated. Libvirtd has to actively
tear down a macvtap device and it uses its name for identifying which
device to tear down.
The solution is to not blank out the <target dev='...'/> completely, but
only blank it out on VMs that are not active. So, if a VM is active, the
device name makes it into the XML and is also being parsed. If a VM is
not active, the device name is discarded.
Signed-off-by: Stefan Berger <stefanb@xxxxxxxxxx>
---
src/conf/domain_conf.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
Index: libvirt-acl/src/conf/domain_conf.c
===================================================================
--- libvirt-acl.orig/src/conf/domain_conf.c
+++ libvirt-acl/src/conf/domain_conf.c
@@ -2343,7 +2343,8 @@ virDomainNetDefParseXML(virCapsPtr caps,
def->data.direct.linkdev = dev;
dev = NULL;
- VIR_FREE(ifname);
+ if ((flags & VIR_DOMAIN_XML_INACTIVE))
+ VIR_FREE(ifname);
break;
@@ -5801,6 +5802,8 @@ virDomainNetDefFormat(virBufferPtr buf,
virBufferAddLit(buf, "/>\n");
virVirtualPortProfileFormat(buf,
&def->data.direct.virtPortProfile,
" ");
+ if ((flags & VIR_DOMAIN_XML_INACTIVE))
+ VIR_FREE(def->ifname);
break;
case VIR_DOMAIN_NET_TYPE_USER:
--
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