[libvirt] [PATCH] virsh: Remove <backingStore> when changing cdrom media source

Since the code is changing the source image path by modifying the existing XML snippet the <backingStore> element does not get dropped. The element is ignored though but it might start being used in the future. Before this patch, you'd get: $ virsh change-media --eject --print-xml 10 hdc <disk type="file" device="cdrom"> <driver name="qemu" type="qcow2"/> <backingStore type="file" index="1"> <format type="qcow2"/> <source file="/var/lib/libvirt/images/vm.1436949097"/> <backingStore/> </backingStore> <target dev="hdc" bus="ide"/> ... </disk> After: $ virsh change-media --eject --print-xml 10 hdc <disk type="file" device="cdrom"> <driver name="qemu" type="qcow2"/> <target dev="hdc" bus="ide"/> ... </disk> --- tools/virsh-domain.c | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-) diff --git a/tools/virsh-domain.c b/tools/virsh-domain.c index a61656f..d4d6987 100644 --- a/tools/virsh-domain.c +++ b/tools/virsh-domain.c @@ -11415,6 +11415,7 @@ vshUpdateDiskXML(xmlNodePtr disk_node, vshUpdateDiskXMLType type) { xmlNodePtr source = NULL; + xmlNodePtr child; char *device_type = NULL; char *ret = NULL; @@ -11430,10 +11431,16 @@ vshUpdateDiskXML(xmlNodePtr disk_node, } /* find the current source subelement */ - for (source = disk_node->children; source; source = source->next) { - if (source->type == XML_ELEMENT_NODE && - xmlStrEqual(source->name, BAD_CAST "source")) - break; + for (child = disk_node->children; child; child = child->next) { + if (child->type == XML_ELEMENT_NODE && + xmlStrEqual(child->name, BAD_CAST "source")) + source = child; + + if (child->type == XML_ELEMENT_NODE && + xmlStrEqual(child->name, BAD_CAST "backingStore")) { + xmlUnlinkNode(child); + xmlFreeNode(child); + } } if (type == VSH_UPDATE_DISK_XML_EJECT) { -- 2.4.5