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package libvirt
import (
"encoding/xml"
"fmt"
libvirt "github.com/libvirt/libvirt-go"
"github.com/libvirt/libvirt-go-xml"
)
func newDefVolume() libvirtxml.StorageVolume {
return libvirtxml.StorageVolume{
Target: &libvirtxml.StorageVolumeTarget{
Format: &libvirtxml.StorageVolumeTargetFormat{
Type: "qcow2",
},
Permissions: &libvirtxml.StorageVolumeTargetPermissions{
Mode: "644",
},
},
Capacity: &libvirtxml.StorageVolumeSize{
Unit: "bytes",
Value: 1,
},
}
}
// Creates a volume definition from a XML
func newDefVolumeFromXML(s string) (libvirtxml.StorageVolume, error) {
var volumeDef libvirtxml.StorageVolume
err := xml.Unmarshal([]byte(s), &volumeDef)
if err != nil {
return libvirtxml.StorageVolume{}, err
}
return volumeDef, nil
}
func newDefVolumeFromLibvirt(volume *libvirt.StorageVol) (libvirtxml.StorageVolume, error) {
name, err := volume.GetName()
if err != nil {
return libvirtxml.StorageVolume{}, fmt.Errorf("could not get name for volume: %s", err)
}
volumeDefXML, err := volume.GetXMLDesc(0)
if err != nil {
return libvirtxml.StorageVolume{}, fmt.Errorf("could not get XML description for volume %s: %s", name, err)
}
volumeDef, err := newDefVolumeFromXML(volumeDefXML)
if err != nil {
return libvirtxml.StorageVolume{}, fmt.Errorf("could not get a volume definition from XML for %s: %s", volumeDef.Name, err)
}
return volumeDef, nil
}
func newDefBackingStoreFromLibvirt(baseVolume *libvirt.StorageVol) (libvirtxml.StorageVolumeBackingStore, error) {
baseVolumeDef, err := newDefVolumeFromLibvirt(baseVolume)
if err != nil {
return libvirtxml.StorageVolumeBackingStore{}, fmt.Errorf("could not get volume: %s", err)
}
baseVolPath, err := baseVolume.GetPath()
if err != nil {
return libvirtxml.StorageVolumeBackingStore{}, fmt.Errorf("could not get base image path: %s", err)
}
backingStoreDef := libvirtxml.StorageVolumeBackingStore{
Path: baseVolPath,
Format: &libvirtxml.StorageVolumeTargetFormat{
Type: baseVolumeDef.Target.Format.Type,
},
}
return backingStoreDef, nil
}
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