902 lines
24 KiB
Go
902 lines
24 KiB
Go
// Copyright 2024 WIT.COM Inc Licensed GPL 3.0
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package main
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import (
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"encoding/xml"
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"fmt"
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"os"
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"path/filepath"
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"reflect"
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"strings"
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"go.wit.com/log"
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"libvirt.org/go/libvirtxml"
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)
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func makeStandardXml(d *DropletT) *libvirtxml.Domain {
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log.Info("create new xml file for:", d.pb.Hostname)
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domcfg := &libvirtxml.Domain{}
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addDefaults(domcfg, "standard.x86")
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addDefaults(domcfg, "memory")
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addDefaults(domcfg, "network")
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addDefaults(domcfg, "spice")
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addDefaults(domcfg, "qcow")
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addDefaults(domcfg, d.pb.Hostname)
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return domcfg
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}
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func writeoutXml(domcfg *libvirtxml.Domain, filename string) bool {
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xmldoc, err := domcfg.Marshal()
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if err != nil {
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fmt.Println("can't make xml file error:\n", err)
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return false
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}
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outfile := "/tmp/" + filename + ".xml"
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regfile, _ := os.OpenFile(outfile, os.O_RDWR|os.O_CREATE, 0666)
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fmt.Fprintln(regfile, xmldoc)
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log.Info("File is in", outfile)
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regfile.Close()
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return true
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}
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func setDiskFilename(domcfg *libvirtxml.Domain, filename string) {
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for i, x := range domcfg.Devices.Disks {
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// Create a new DomainDiskSourceFile struct
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newSource := &libvirtxml.DomainDiskSourceFile{
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File: filename, // Set the file name here
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}
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// Assign it to the disk's source
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domcfg.Devices.Disks[i].Source.File = newSource
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// fmt.Printf("Disk Source %s\n", name)
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fmt.Printf("Disk Device %s\n", x.Source.File)
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}
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}
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func addDefaults(d *libvirtxml.Domain, filename string) {
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fullname := "resources/xml/" + filename + ".xml"
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pfile, err := resources.ReadFile(fullname)
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if err != nil {
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log.Println("ERROR:", err)
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return
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}
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err = d.Unmarshal(string(pfile))
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if err != nil {
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log.Info("Marshal failed on file", filename)
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return
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}
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}
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func readXml(filename string) (*libvirtxml.Domain, error) {
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log.Verbose("parse xml file:", filename)
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hostname := filepath.Base(filename)
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hostname = strings.TrimSuffix(hostname, ".xml")
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pfile, err := os.ReadFile(filename)
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if err != nil {
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log.Println("ERROR:", err)
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return nil, err
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}
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domcfg := &libvirtxml.Domain{}
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err = domcfg.Unmarshal(string(pfile))
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if err != nil {
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log.Info("Marshal failed on file", filename, err)
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return nil, ErrorParseXML
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}
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if domcfg.Name != hostname {
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log.Info("ERROR: filename:", filename)
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log.Info("ERROR: domcfg.Name != name", domcfg.Name, hostname)
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log.Info("ERROR: xml filenames must match the xml name")
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os.Exit(-1)
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}
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return domcfg, nil
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}
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func (d *DropletT) mergeXml(filename string) error {
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log.Info("merge xml file:", filename)
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pfile, err := os.ReadFile(filename)
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if err != nil {
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log.Println("ERROR:", err)
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return ErrorNoFile
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}
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err = d.xml.Unmarshal(string(pfile))
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if err != nil {
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log.Info("Marshal failed on file", filename)
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return ErrorParseXML
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}
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return nil
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}
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func setSimpleDisk(domcfg *libvirtxml.Domain, filename string) {
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// Clear out the existing disks (if any)
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domcfg.Devices.Disks = nil
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// Define a new disk with "mynew.qcow2"
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newDisk := libvirtxml.DomainDisk{
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Device: "disk",
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Driver: &libvirtxml.DomainDiskDriver{
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Name: "qemu",
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Type: "qcow2",
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},
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Source: &libvirtxml.DomainDiskSource{
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File: &libvirtxml.DomainDiskSourceFile{
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File: filename,
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},
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},
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Target: &libvirtxml.DomainDiskTarget{
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Dev: "vda",
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Bus: "virtio",
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},
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}
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// Add the new disk to the domain configuration
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domcfg.Devices.Disks = append(domcfg.Devices.Disks, newDisk)
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}
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func getMacs(domcfg *libvirtxml.Domain) []string {
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var macs []string
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// Iterate over the network interfaces and print the MAC addresses
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for _, iface := range domcfg.Devices.Interfaces {
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if iface.MAC != nil {
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// iface.MAC.Address = "aa:bb:aa:bb:aa:ff"
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fmt.Printf("MAC Address: %+v\n", iface.MAC)
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// fmt.Printf("Interface: %s, MAC Address: %s\n", iface.Target.Dev, iface.MAC.Address)
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macs = append(macs, iface.MAC.Address)
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} else {
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fmt.Printf("Interface: %s, MAC Address: not available\n", iface.Target.Dev)
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}
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}
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return macs
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}
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// removes all the ethernet interfaces
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func clearEthernet(domcfg *libvirtxml.Domain) {
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// Clear out the existing disks (if any)
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domcfg.Devices.Interfaces = nil
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}
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// add a new ethernet interface with mac assigned to bridge name
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func addEthernet(domcfg *libvirtxml.Domain, mac string, brname string) {
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// Define a new disk with "mynew.qcow2"
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type DomainInterfaceType string
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newNet := libvirtxml.DomainInterface{
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MAC: &libvirtxml.DomainInterfaceMAC{
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Address: mac,
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},
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Target: &libvirtxml.DomainInterfaceTarget{
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Dev: brname,
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},
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}
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// Add the new disk to the domain configuration
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domcfg.Devices.Interfaces = append(domcfg.Devices.Interfaces, newNet)
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}
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func setRandomMacs(domcfg *libvirtxml.Domain) {
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for i, x := range domcfg.Devices.Interfaces {
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// Create a new DomainDiskInterfaces struct
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newMac := &libvirtxml.DomainInterfaceMAC{
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Address: "aa:bb:cc:dd:ee:ff", // make sure this is unique
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}
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// Assign it to the disk's source
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domcfg.Devices.Interfaces[i].MAC = newMac
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// fmt.Printf("Disk Source %s\n", name)
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// fmt.Printf("mac addr %+v\n", x.MAC)
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fmt.Printf("mac addr %s\n", x.MAC.Address)
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}
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}
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// go through the libvirt xml object and dump out everything
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// that is "standard". This is just a way to double check that
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// there might be something interesting in a VM
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// 'standard' here means what I think is standard
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func dumpNonStandardXML(domcfg *libvirtxml.Domain) (string, error) {
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// dump type
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if domcfg.Type == "kvm" {
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domcfg.Type = ""
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} else {
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fmt.Printf("type: %+v\n", domcfg.Type)
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}
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// dump normal OS settings
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var standardOS bool = false
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if domcfg.OS != nil {
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if domcfg.OS.Type != nil {
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// OS Type: &{Arch:x86_64 Machine:pc-i440fx-5.2 Type:hvm}
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t := domcfg.OS.Type
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if t.Arch == "x86_64" || t.Machine == "pc-i440fx-5.2" {
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standardOS = true
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}
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}
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}
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if standardOS {
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domcfg.OS = nil
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} else {
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fmt.Printf("OS: %+v\n", domcfg.OS)
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fmt.Printf("OS Type: %+v\n", domcfg.OS.Type)
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}
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// ignore XMLName and IOThreads probably
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// skip is hard coded in isDomainEmpty() function
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// fmt.Printf("XMLName: %+v\n", domcfg.XMLName)
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// fmt.Printf("IOThreads: %+v\n", domcfg.IOThreads)
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// dump all the clock stuff if it's standard
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var normalclock bool = true
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if domcfg.Clock.Offset != "utc" {
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normalclock = false
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}
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for i, t := range domcfg.Clock.Timer {
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// fmt.Printf("Test Clock Timer: %d , %s , %+v\n", i, t.Name, t)
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switch t.Name {
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case "rtc":
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if t.TickPolicy != "catchup" {
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fmt.Printf("Clock Name: %+v , %+v\n", i, t)
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normalclock = false
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}
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case "pit":
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if t.TickPolicy != "delay" {
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fmt.Printf("Clock Name: %+v , %+v\n", i, t)
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normalclock = false
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}
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case "hpet":
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if t.Present != "no" {
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fmt.Printf("Clock Name: %+v , %+v\n", i, t)
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normalclock = false
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}
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default:
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fmt.Printf("Clock Name: %+v , %+v\n", i, t)
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normalclock = false
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}
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}
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if normalclock {
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domcfg.Clock = nil
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} else {
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fmt.Printf("Clock was 'nonstandard' %+v\n", domcfg.Clock.Timer)
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}
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// probably just dump Features for now
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// fmt.Printf("Features: %+v\n", domcfg.Features)
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// fmt.Printf("Feature VMPort: %+v\n", domcfg.Features.VMPort)
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// ignore if ACPI is set or not
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var featurematch bool = true
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if domcfg.Features.ACPI != nil {
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domcfg.Features.ACPI = nil
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} else {
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featurematch = false
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}
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// ignore if APIC is set or not
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if domcfg.Features.APIC != nil {
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domcfg.Features.APIC = nil
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} else {
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featurematch = false
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}
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// what is VMPort anyway?
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if domcfg.Features.VMPort != nil {
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if domcfg.Features.VMPort.State == "off" {
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domcfg.Features.VMPort = nil
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}
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} else {
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featurematch = false
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}
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// screwit, if all three of those match just erase
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// this. not sure what uses it anyway but it's probably obscure
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// and I'm not using it on any of my machines right now
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// also, this is dumb that I'm doing this but I want to
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// fine tooth comb through this right now
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// also, I don't have a boss so nobody can tell me what to do
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if featurematch {
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domcfg.Features = nil
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}
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// fmt.Printf("Features: %+v\n", domcfg.Features)
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// for i, f := range domcfg.Features {
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// fmt.Printf("Feature: %+v , %+v\n", i, f)
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// }
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// these should always just be strings?
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domcfg.Name = ""
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domcfg.UUID = ""
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// todo: actually check these for anything different
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domcfg.Memory = nil
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domcfg.CurrentMemory = nil
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domcfg.VCPU = nil
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// is this always "host-passthrough" and "host-model"?
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// only Fabrice knows :)
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if domcfg.CPU != nil {
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switch domcfg.CPU.Mode {
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case "host-passthrough":
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domcfg.CPU = nil
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case "host-model":
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domcfg.CPU = nil
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case "custom":
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updatedXML, _ := xml.MarshalIndent(domcfg.CPU, "", " ")
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log.Info("Ignore custom CPU Start")
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fmt.Println(string(updatedXML))
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log.Info("Ignore custom CPU End")
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log.Info("Add --xml-ignore-cpu to ignore this")
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if argv.IgnoreCpu {
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domcfg.CPU = nil
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}
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default:
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fmt.Printf("unknown CPU: %+v\n", domcfg.CPU)
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fmt.Printf("unknown CPU Model: %+v\n", domcfg.CPU.Model)
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fmt.Printf("unknown CPU Mode: %+v\n", domcfg.CPU.Mode)
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updatedXML, _ := xml.MarshalIndent(domcfg.CPU, "", " ")
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log.Info("Non-Standard XML Start")
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fmt.Println(string(updatedXML))
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log.Info("Non-Standard XML End")
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}
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}
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var secnormal bool = true
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if len(domcfg.SecLabel) != 0 {
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for _, sec := range domcfg.SecLabel {
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if sec.Model == "apparmor" {
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// this should be configured in dom0
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} else {
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fmt.Printf("? SecLabel: %+v\n", sec)
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fmt.Printf("? SecLabel.Model: %+v\n", sec.Model)
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secnormal = false
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}
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}
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}
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if secnormal {
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domcfg.SecLabel = nil
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}
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// ignore Metadata
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// this is probably something about what kind of OS you might be running
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// todo: get this directly from the disk image
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if domcfg.Metadata != nil {
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fmt.Printf("Not saving Domain.Metadata: %+v\n", domcfg.Metadata)
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domcfg.Metadata = nil
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}
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// ignore Resource
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if domcfg.Resource != nil {
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if domcfg.Resource.Partition == "/machine" {
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domcfg.Resource = nil
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} else {
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fmt.Printf("non-standard Domain.Resource: %+v\n", domcfg.Resource)
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}
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}
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// this will move elsewhere in the protobuf someday
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// ignore all these for now
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if domcfg.OnPoweroff != "" { // normally "destroy"
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domcfg.OnPoweroff = ""
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}
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if domcfg.OnCrash != "" { // normally "restart", often "destroy"
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domcfg.OnCrash = ""
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}
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if domcfg.OnReboot != "" { // normally "restart"
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domcfg.OnReboot = ""
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}
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// same with PM. move to protobuf
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domcfg.PM = nil
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// only keep non-qemu stuff
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var qemu bool = true
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for _, disk := range domcfg.Devices.Disks {
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if disk.Driver.Name != "qemu" {
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fmt.Printf("- Disk: %s, Device: %s, Source: %s\n", disk.Device, disk.Driver.Name, disk.Source.File.File)
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fmt.Printf("FOUND NON QEMU DISK\n")
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fmt.Printf("FOUND NON QEMU DISKS\n")
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qemu = false
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} else {
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}
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}
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if qemu {
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domcfg.Devices.Disks = nil
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} else {
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// fmt.Printf("FOUND NON QEMU DISKS\n")
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}
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// network interfaces get processed elsewhere
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domcfg.Devices.Interfaces = nil
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// look for strange stuff here
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var normalPCI bool = true
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var keepPCI []libvirtxml.DomainController
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for _, controller := range domcfg.Devices.Controllers {
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switch controller.Type {
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case "usb":
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switch controller.Model {
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case "ich9-ehci1":
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case "piix3-uhci":
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case "qemu-xhci":
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// fmt.Printf("OK USB: %s, %d\n", controller.Model, *controller.Index)
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case "ich9-uhci1":
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// fmt.Printf("OK USB: %s, %d\n", controller.Model, *controller.Index)
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case "ich9-uhci2":
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// fmt.Printf("OK USB: %s, %d\n", controller.Model, *controller.Index)
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case "ich9-uhci3":
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// fmt.Printf("OK USB: %s, %d\n", controller.Model, *controller.Index)
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default:
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keepPCI = append(keepPCI, controller)
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normalPCI = false
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fmt.Printf("USB: %s, %d\n", controller.Model, *controller.Index)
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// Domain:0xc0002d2760 Bus:0xc0002d2768 Slot:0xc0002d2770 Function:0xc0002d2778 MultiFunction:
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pci := controller.Address.PCI
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fmt.Printf("USB: Domain: %+v Slot %d Function %d\n", *pci.Domain, *pci.Slot, *pci.Function)
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}
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case "ide":
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// fmt.Printf("IGNORE IDE\n")
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case "virtio-serial":
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// fmt.Printf("IGNORE virtio-serial\n")
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case "sata":
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// fmt.Printf("SATA: %s, %d\n", controller.Model, *controller.Index)
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// fmt.Printf("SATA: %+v\n", controller)
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case "scsi":
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switch controller.Model {
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case "virtio-scsi":
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// fmt.Printf("IGNORE SCSI: lsilogic\n")
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case "lsilogic":
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// fmt.Printf("IGNORE SCSI: lsilogic\n")
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default:
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keepPCI = append(keepPCI, controller)
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normalPCI = false
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}
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case "pci":
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// these are the strings I've found so far
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switch controller.Model {
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case "pci-root":
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case "pcie-root":
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case "pcie-root-port":
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case "pcie-to-pci-bridge":
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default:
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fmt.Printf("PCI: %s, %d\n", controller.Model, *controller.Index)
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// Domain:0xc0002d2760 Bus:0xc0002d2768 Slot:0xc0002d2770 Function:0xc0002d2778 MultiFunction:
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if controller.Address == nil {
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fmt.Printf("PCI: controller.Address = nil\n")
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} else {
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pci := controller.Address.PCI
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fmt.Printf("PCI: Domain: %+v Slot %d Function %d\n", *pci.Domain, *pci.Slot, *pci.Function)
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}
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normalPCI = false
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keepPCI = append(keepPCI, controller)
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}
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default:
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fmt.Printf("? controllerType: %s: %+v\n", controller.Type, controller)
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normalPCI = false
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keepPCI = append(keepPCI, controller)
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}
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}
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if normalPCI {
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domcfg.Devices.Controllers = nil
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} else {
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domcfg.Devices.Controllers = keepPCI
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}
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// ignore serial and console
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domcfg.Devices.Serials = nil
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domcfg.Devices.Consoles = nil
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// ignore sound
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domcfg.Devices.Sounds = nil
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// ignore input
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domcfg.Devices.Inputs = nil
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// ignore MemoryBalloon. This is cool, but no mortal humans
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// are going to use it at this point. By that I mean me.
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// someday this will be in protobuf?
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domcfg.Devices.MemBalloon = nil
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if domcfg.Devices.Emulator == "/usr/bin/qemu-system-x86_64" {
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domcfg.Devices.Emulator = ""
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}
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// ignore Graphics == Spice when AutoPort = 'yes'
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var normalSpice bool = true
|
|
if domcfg.Devices.Graphics != nil {
|
|
for i, g := range domcfg.Devices.Graphics {
|
|
if g.VNC != nil {
|
|
// ignore vnc settings
|
|
// fmt.Printf("Ignore Graphics VNC settings: %d %+v\n", i, g)
|
|
continue
|
|
}
|
|
if g.Spice != nil {
|
|
// this is all moved to updateDroplet()
|
|
// this is a spice definition, just ignore it
|
|
// because port mappings and network access will be handled
|
|
// somewhere else someday
|
|
// fmt.Printf("Graphics: %d %+v\n", i, g)
|
|
var s *libvirtxml.DomainGraphicSpice
|
|
s = g.Spice
|
|
// fmt.Printf("Spice: %d %+v %s\n", i, s, s.AutoPort)
|
|
if s.AutoPort == "yes" {
|
|
// should ignore either way
|
|
} else {
|
|
// print out, but ignore the port number
|
|
// fmt.Printf("Spice Port = %d\n", s.Port)
|
|
}
|
|
continue
|
|
}
|
|
// figure out what to do with non-spice stuff
|
|
fmt.Printf("Unknown Graphics: %d %+v\n", i, g)
|
|
normalSpice = false
|
|
}
|
|
}
|
|
if normalSpice {
|
|
domcfg.Devices.Graphics = nil
|
|
}
|
|
|
|
// blank out emulator. should be in dom0
|
|
switch domcfg.Devices.Emulator {
|
|
case "":
|
|
domcfg.Devices.Emulator = ""
|
|
case "/usr/bin/kvm":
|
|
domcfg.Devices.Emulator = ""
|
|
case "/usr/bin/kvm-spice":
|
|
domcfg.Devices.Emulator = ""
|
|
default:
|
|
fmt.Printf("Unknown Emulator: %s\n", domcfg.Devices.Emulator)
|
|
}
|
|
|
|
// ignore Channels == SpiceVMC
|
|
normalSpice = true
|
|
if domcfg.Devices.Channels != nil {
|
|
for _, c := range domcfg.Devices.Channels {
|
|
if c.Source != nil {
|
|
s := c.Source
|
|
if s != nil {
|
|
// fmt.Printf("Channels: %+v\n", s.SpiceVMC)
|
|
} else {
|
|
fmt.Printf("? Channels: %+v\n", c)
|
|
normalSpice = false
|
|
}
|
|
} else {
|
|
fmt.Printf("? Channels: %+v\n", c)
|
|
normalSpice = false
|
|
}
|
|
}
|
|
}
|
|
if normalSpice {
|
|
domcfg.Devices.Channels = nil
|
|
}
|
|
|
|
// this is probably for spice to have keyboard and mouse input
|
|
normalSpice = true
|
|
if domcfg.Devices.RedirDevs != nil {
|
|
for _, c := range domcfg.Devices.RedirDevs {
|
|
s := c.Source
|
|
if s != nil {
|
|
if s.SpiceVMC != nil {
|
|
// this is the normal USB redirection (I guess)
|
|
} else {
|
|
normalSpice = false
|
|
}
|
|
} else {
|
|
normalSpice = false
|
|
}
|
|
// fmt.Printf("? RedirDevs: %+v\n", c)
|
|
// fmt.Printf("? RedirDevs Source: %+v\n", s)
|
|
// fmt.Printf("? RedirDevs SpiceVMC: %d\n", *s.SpiceVMC)
|
|
// fmt.Printf("? RedirDevs Address: %+v\n", c.Address)
|
|
// fmt.Printf("? RedirDevs USB: %+v\n", c.Address.USB)
|
|
}
|
|
}
|
|
if normalSpice {
|
|
domcfg.Devices.RedirDevs = nil
|
|
}
|
|
|
|
var normalRNGs bool = true
|
|
if domcfg.Devices.RNGs != nil {
|
|
for _, rng := range domcfg.Devices.RNGs {
|
|
if rng.Model == "virtio" {
|
|
// nothing to do for this
|
|
} else {
|
|
fmt.Printf("? RNGs: %+v\n", rng)
|
|
normalRNGs = false
|
|
}
|
|
}
|
|
}
|
|
if normalRNGs {
|
|
domcfg.Devices.RNGs = nil
|
|
}
|
|
|
|
// don't copy this over here yet.
|
|
// probably most domU's don't really use/need it set to what is in the XML
|
|
var normalVideo bool = true
|
|
if domcfg.Devices.Videos != nil {
|
|
for _, v := range domcfg.Devices.Videos {
|
|
switch v.Model.Type {
|
|
case "qxl":
|
|
if v.Model.VRam == 65536 {
|
|
// standard qxl video
|
|
} else {
|
|
fmt.Printf("? Video: %+v\n", v)
|
|
fmt.Printf("? Video Model: %+v\n", v.Model)
|
|
normalVideo = false
|
|
}
|
|
case "cirrus":
|
|
case "virtio":
|
|
// this should always be standard
|
|
//fmt.Printf("? Video: %+v\n", v)
|
|
//fmt.Printf("? Video Model: %+v\n", v.Model)
|
|
//fmt.Printf("? Video Address: %+v\n", v.Address)
|
|
//fmt.Printf("? Video PCI: %+v\n", v.Address.PCI)
|
|
default:
|
|
fmt.Printf("? Video: %+v\n", v)
|
|
fmt.Printf("? Video Model: %+v\n", v.Model)
|
|
normalVideo = false
|
|
}
|
|
}
|
|
}
|
|
if normalVideo {
|
|
domcfg.Devices.Videos = nil
|
|
}
|
|
|
|
return finalEmptyCheck(domcfg)
|
|
}
|
|
|
|
// this tries the final zero'ing out of the XML
|
|
// todo: if this fails, put the remaining XML in the protobuf file?
|
|
func finalEmptyCheck(domcfg *libvirtxml.Domain) (string, error) {
|
|
// dumpLibvirtxmlDomainNames()
|
|
if libvirtxmlDomainDevicesEmpty(*domcfg.Devices) {
|
|
// fmt.Println("Domain Devices are empty")
|
|
domcfg.Devices = nil
|
|
} else {
|
|
return warnUserOfNonStandardXML(domcfg)
|
|
}
|
|
|
|
if libvirtxmlDomainEmpty(*domcfg) {
|
|
domcfg = nil
|
|
return warnUserOfNonStandardXML(domcfg)
|
|
}
|
|
|
|
final, err := warnUserOfNonStandardXML(domcfg)
|
|
if err != nil {
|
|
fmt.Printf("todo: improve this libvirtXML parsing. %v\n", err)
|
|
os.Exit(-1)
|
|
}
|
|
if final != "" {
|
|
me.changed = true
|
|
}
|
|
return final, nil
|
|
}
|
|
|
|
func warnUserOfNonStandardXML(domcfg *libvirtxml.Domain) (string, error) {
|
|
updatedXML, err := xml.MarshalIndent(domcfg, "", " ")
|
|
if err != nil {
|
|
fmt.Printf("Failed to marshal updated XML: %v\n", err)
|
|
return "", err
|
|
}
|
|
final := string(updatedXML)
|
|
if final == "" {
|
|
// everything seems to have been parsed pretty standard
|
|
return "", nil
|
|
}
|
|
log.Info("Non-Standard XML Start")
|
|
fmt.Println(string(updatedXML))
|
|
log.Info("Non-Standard XML End")
|
|
log.Info("")
|
|
log.Info("This XML must be removed by hand. Put this in the protobuf?")
|
|
return string(updatedXML), nil
|
|
}
|
|
|
|
// dump out all the fields in libvirtxml.DomainDeviceList
|
|
func dumpLibvirtxmlDomainNames() {
|
|
var domain libvirtxml.Domain
|
|
t := reflect.TypeOf(domain)
|
|
|
|
fmt.Println("Fields in libvirtxml.Domain:")
|
|
for i := 0; i < t.NumField(); i++ {
|
|
field := t.Field(i)
|
|
fmt.Println("Domain:", field.Name)
|
|
}
|
|
|
|
var device libvirtxml.DomainDeviceList
|
|
t = reflect.TypeOf(device)
|
|
|
|
fmt.Println("Fields in libvirtxml.DomainDeviceList:")
|
|
for i := 0; i < t.NumField(); i++ {
|
|
field := t.Field(i)
|
|
fmt.Println("DomainDeviceList:", field.Name)
|
|
}
|
|
|
|
var iface libvirtxml.DomainInterface
|
|
t = reflect.TypeOf(iface)
|
|
|
|
fmt.Println("Fields in libvirtxml.DomainInterface:")
|
|
for i := 0; i < t.NumField(); i++ {
|
|
field := t.Field(i)
|
|
fmt.Println("DomainInterface:", field.Name)
|
|
}
|
|
}
|
|
|
|
// dump out all the fields in libvirtxml.DomainDeviceList
|
|
func libvirtxmlDomainDevicesEmpty(mydom libvirtxml.DomainDeviceList) bool {
|
|
var empty bool = true
|
|
// Get the reflection object of the variable
|
|
v := reflect.ValueOf(mydom)
|
|
|
|
// Ensure that we are working with a struct
|
|
if v.Kind() == reflect.Struct {
|
|
// fmt.Println("Fields and values in libvirtxml.DomainDeviceList:")
|
|
|
|
// Loop through each field in the struct
|
|
for i := 0; i < v.NumField(); i++ {
|
|
// Get field name
|
|
field := v.Type().Field(i).Name
|
|
|
|
// Get field value
|
|
value := v.Field(i)
|
|
|
|
if !value.IsValid() {
|
|
fmt.Printf("Field: %s is nil or invalid\n", field)
|
|
continue
|
|
}
|
|
|
|
// Check if the field is a string, array, or slice
|
|
switch value.Kind() {
|
|
case reflect.String:
|
|
if value.String() != "" {
|
|
fmt.Printf("Field: %s is a String with value: %s\n", field, value.String())
|
|
empty = false
|
|
}
|
|
case reflect.Slice:
|
|
if value.Len() != 0 {
|
|
fmt.Printf("Field: %s is a Slice with length: %d\n", field, value.Len())
|
|
empty = false
|
|
}
|
|
case reflect.Array:
|
|
if value.Len() != 0 {
|
|
fmt.Printf("Field: %s is an Array with length: %d\n", field, value.Len())
|
|
empty = false
|
|
}
|
|
case reflect.Ptr:
|
|
if !value.IsValid() {
|
|
fmt.Println("Field ptr: value:", value)
|
|
fmt.Printf("Field ptr: %s is of type: %s\n", field, value.Kind())
|
|
empty = false
|
|
}
|
|
default:
|
|
fmt.Printf("Field: %s is of type: %s\n", field, value.Kind())
|
|
empty = false
|
|
}
|
|
// Print the field name and value
|
|
// fmt.Printf("Field: %s, Value: %v\n", field, value)
|
|
}
|
|
} else {
|
|
fmt.Println("Provided variable is not a struct.")
|
|
}
|
|
return empty
|
|
}
|
|
|
|
// dump out all the fields in libvirtxml.DomainDeviceList
|
|
func libvirtxmlDomainEmpty(mydom libvirtxml.Domain) bool {
|
|
var empty bool = true
|
|
// Get the reflection object of the variable
|
|
v := reflect.ValueOf(mydom)
|
|
|
|
// Ensure that we are working with a struct
|
|
if v.Kind() == reflect.Struct {
|
|
// fmt.Println("Fields and values in libvirtxml.DomainDeviceList:")
|
|
|
|
// Loop through each field in the struct
|
|
for i := 0; i < v.NumField(); i++ {
|
|
// Get field name
|
|
field := v.Type().Field(i).Name
|
|
|
|
// Get field value
|
|
value := v.Field(i)
|
|
|
|
if !value.IsValid() {
|
|
fmt.Printf("Field: %s is invalid\n", field)
|
|
continue
|
|
}
|
|
// processed as Domain.Metadata & Domain.Resource
|
|
// if (field == "IOThreads") || (field == "XMLName") {
|
|
// fmt.Printf("Field: %s is: %s\n", field, value.String())
|
|
// continue
|
|
// }
|
|
|
|
// Check if the field is a string, array, or slice
|
|
switch value.Kind() {
|
|
case reflect.String:
|
|
if value.String() != "" {
|
|
fmt.Printf("Field: %s is a String with value: %s\n", field, value.String())
|
|
empty = false
|
|
}
|
|
case reflect.Slice:
|
|
if value.Len() != 0 {
|
|
fmt.Printf("Field: %s is a Slice with length: %d\n", field, value.Len())
|
|
empty = false
|
|
}
|
|
case reflect.Array:
|
|
if value.Len() != 0 {
|
|
fmt.Printf("Field: %s is an Array with length: %d\n", field, value.Len())
|
|
empty = false
|
|
}
|
|
case reflect.Struct:
|
|
if IsStructEmptyOrNil(value) {
|
|
fmt.Printf("XML Field ignore empty Struct %s\n", field)
|
|
} else {
|
|
fmt.Printf("Field Struct is not empty %s is %+v\n", field, value)
|
|
empty = false
|
|
}
|
|
case reflect.Uint:
|
|
// probably ignore ints. when has that ever gone wrong?
|
|
case reflect.Ptr:
|
|
if value.IsValid() {
|
|
if value.IsNil() {
|
|
// this means the value is actually nil
|
|
} else {
|
|
// there is something still here in the libvirt XML
|
|
fmt.Printf("Field Valid? field %s is of type: %s\n", field, value.Kind())
|
|
fmt.Println("Field Valid? ptr: value:", value)
|
|
empty = false
|
|
}
|
|
} else {
|
|
fmt.Println("Invalid Field ptr: value:", value)
|
|
fmt.Printf("Invalid Field ptr: %s is of type: %s\n", field, value.Kind())
|
|
empty = false
|
|
}
|
|
default:
|
|
fmt.Printf("Field: %s is of type: %s\n", field, value.Kind())
|
|
empty = false
|
|
}
|
|
// Print the field name and value
|
|
// fmt.Printf("Field: %s, Value: %v\n", field, value)
|
|
}
|
|
} else {
|
|
fmt.Println("Provided variable is not a struct.")
|
|
}
|
|
return empty
|
|
}
|
|
|
|
// IsStructEmptyOrNil checks if a struct or pointer to struct is empty, blank, or nil
|
|
func IsStructEmptyOrNil(value interface{}) bool {
|
|
val := reflect.ValueOf(value)
|
|
|
|
// If the value is a pointer, check if it's nil and dereference it if not
|
|
if val.Kind() == reflect.Ptr {
|
|
if val.IsNil() {
|
|
return true
|
|
}
|
|
val = val.Elem()
|
|
}
|
|
|
|
// Ensure we're dealing with a struct after potential dereferencing
|
|
if val.Kind() != reflect.Struct {
|
|
return false // Not a struct
|
|
}
|
|
|
|
// Check each field in the struct for its zero value
|
|
for i := 0; i < val.NumField(); i++ {
|
|
field := val.Field(i)
|
|
// Skip unexported fields as we can't access them
|
|
if !field.CanInterface() {
|
|
continue
|
|
}
|
|
if !reflect.DeepEqual(field.Interface(), reflect.Zero(field.Type()).Interface()) {
|
|
return false // Found a non-zero field
|
|
}
|
|
}
|
|
|
|
return true // All fields are zero values
|
|
}
|