fdd233a25f
When transforming a NodeConf struct to a NodeInfo (get the NodeInfo from the Nodconf) nested structures were seperately handled. This means there were seperate handles for e.g *Netdevs and *IpmiConfig. The new getter traverses through the datastucture and sets the right value for an Entry struct, but calls itself again if a Pointer is detected. This adds the posiblity to add new nested structures to NodeConf and NodeInfo without the need of seperate handling them in the transformer functions. Signed-off-by: Christian Goll <cgoll@suse.de>
496 lines
18 KiB
Go
496 lines
18 KiB
Go
package node
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import (
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"fmt"
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"reflect"
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"strings"
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"github.com/hpcng/warewulf/internal/pkg/util"
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"github.com/hpcng/warewulf/internal/pkg/wwlog"
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)
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/*
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Populates a NodeConf struct (the one which goes to disk) from a
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NodeInfo (which just lives in memory), with the values from all
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the underlying entries using GetReal, so just the explicit values
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go do disk.
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*/
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func (nodeConf *NodeConf) GetRealFrom(nodeInfo NodeInfo) {
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recursiveGetter(&nodeInfo, nodeConf, (*Entry).GetReal, (*Entry).GetRealSlice)
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}
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/*
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Populates a NodeConf struct from a NodeInfo, with the combined
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values from the underlying entries using Get.
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*/
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func (nodeConf *NodeConf) GetFrom(nodeInfo NodeInfo) {
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recursiveGetter(&nodeInfo, nodeConf, (*Entry).Get, (*Entry).GetSlice)
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}
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/*
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Abstract function which populates a NodeConf from the given NodeInfo
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via getter functions. Calls recursive itself for nested structures.
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Panics if the NodeConf has fields which are not type of string,[]string,map[string]*ptr
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*/
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func recursiveGetter(
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source, target interface{},
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getter func(*Entry) string,
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getterSlice func(*Entry) []string) {
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sourceValue := reflect.ValueOf(source)
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targetType := reflect.TypeOf(target)
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targetValue := reflect.ValueOf(target)
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if targetValue.Elem().Kind() == reflect.Struct && sourceValue.Elem().Kind() == reflect.Struct {
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for i := 0; i < targetType.Elem().NumField(); i++ {
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sourceValueMatched := sourceValue.Elem().FieldByName(targetType.Elem().Field(i).Name)
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if sourceValueMatched.IsValid() {
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if sourceValueMatched.Type() == reflect.TypeOf(Entry{}) {
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// get the fields which are part of the struct
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switch targetValue.Elem().Field(i).Type() {
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case reflect.TypeOf(""):
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newValue := (targetValue.Elem().Field(i).Addr().Interface()).(*string)
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source := sourceValueMatched.Interface().(Entry)
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*newValue = getter(&source)
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case reflect.TypeOf([]string{}):
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newValue := (targetValue.Elem().Field(i).Addr().Interface()).(*[]string)
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source := sourceValueMatched.Interface().(Entry)
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*newValue = getterSlice(&source)
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default:
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panic(fmt.Errorf("can't convert an Entry to %s", targetValue.Elem().Field(i).Type()))
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}
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} else if sourceValueMatched.Kind() == reflect.Ptr {
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// if we get a pointer, initialize if empty and then have a recursive call
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if targetValue.Elem().Field(i).IsZero() {
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targetValue.Elem().Field(i).Set(reflect.New(targetType.Elem().Field(i).Type.Elem()))
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}
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recursiveGetter(sourceValueMatched.Interface(), targetValue.Elem().Field(i).Interface(), getter, getterSlice)
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} else if sourceValueMatched.Type().Kind() == reflect.Map {
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if targetValue.Elem().Field(i).IsZero() {
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targetValue.Elem().Field(i).Set(reflect.MakeMap(targetType.Elem().Field(i).Type))
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}
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sourceIter := sourceValueMatched.MapRange()
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if sourceValueMatched.Type() == reflect.TypeOf(map[string]*Entry{}) {
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// go over a simple map with strings
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for sourceIter.Next() {
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if !targetValue.Elem().Field(i).MapIndex(sourceIter.Key()).IsValid() {
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str := getter((sourceIter.Value().Interface()).(*Entry))
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targetValue.Elem().Field(i).SetMapIndex(sourceIter.Key(), reflect.ValueOf(str))
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}
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}
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} else {
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// now the complicated map which contains pointers to objects
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for sourceIter.Next() {
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if !targetValue.Elem().Field(i).MapIndex(sourceIter.Key()).IsValid() {
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newPtr := reflect.New(targetType.Elem().Field(i).Type.Elem().Elem())
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targetValue.Elem().Field(i).SetMapIndex(sourceIter.Key(), newPtr)
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}
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recursiveGetter(sourceIter.Value().Interface(), targetValue.Elem().Field(i).MapIndex(sourceIter.Key()).Interface(), getter, getterSlice)
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}
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}
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}
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}
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}
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}
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}
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/*
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Populates all fields of NodeInfo with Set from the
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values of NodeConf.
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*/
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func (node *NodeInfo) SetFrom(n *NodeConf) {
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setWrap := func(entr *Entry, val string, nameArg string) {
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entr.Set(val)
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}
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setSliceWrap := func(entr *Entry, val []string, nameArg string) {
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entr.SetSlice(val)
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}
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node.setterFrom(n, "", setWrap, setSliceWrap)
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}
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/*
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Populates all fields of NodeInfo with SetAlt from the
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values of NodeConf. The string profileName is used to
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destermine from which source/NodeInfo the entry came
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from.
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*/
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func (node *NodeInfo) SetAltFrom(n *NodeConf, profileName string) {
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node.setterFrom(n, profileName, (*Entry).SetAlt, (*Entry).SetAltSlice)
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}
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/*
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Populates all fields of NodeInfo with SetDefault from the
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values of NodeConf.
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*/
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func (node *NodeInfo) SetDefFrom(n *NodeConf) {
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setWrap := func(entr *Entry, val string, nameArg string) {
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entr.SetDefault(val)
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}
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setSliceWrap := func(entr *Entry, val []string, nameArg string) {
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entr.SetDefaultSlice(val)
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}
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node.setterFrom(n, "", setWrap, setSliceWrap)
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}
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/*
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Abstract function which populates a NodeInfo from a NodeConf via
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setter functionns.
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*/
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func (node *NodeInfo) setterFrom(n *NodeConf, nameArg string,
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setter func(*Entry, string, string),
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setterSlice func(*Entry, []string, string)) {
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// get the full memory, taking the shortcut and init Ipmi and Kernel directly
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if node.Kernel == nil {
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node.Kernel = new(KernelEntry)
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}
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if node.Ipmi == nil {
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node.Ipmi = new(IpmiEntry)
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}
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// also n could be nil
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if n == nil {
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myn := NewConf()
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n = &myn
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}
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nodeInfoVal := reflect.ValueOf(node)
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nodeInfoType := reflect.TypeOf(node)
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nodeConfVal := reflect.ValueOf(n)
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// now iterate of every field
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for i := 0; i < nodeInfoType.Elem().NumField(); i++ {
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valField := nodeConfVal.Elem().FieldByName(nodeInfoType.Elem().Field(i).Name)
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if valField.IsValid() {
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// found field with same name for Conf and Info
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if nodeInfoType.Elem().Field(i).Type == reflect.TypeOf(Entry{}) {
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if valField.Type().Kind() == reflect.String {
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setter(nodeInfoVal.Elem().Field(i).Addr().Interface().(*Entry), valField.String(), nameArg)
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} else if valField.Type() == reflect.TypeOf([]string{}) {
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setterSlice(nodeInfoVal.Elem().Field(i).Addr().Interface().(*Entry), valField.Interface().([]string), nameArg)
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}
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} else if nodeInfoType.Elem().Field(i).Type.Kind() == reflect.Ptr && !valField.IsZero() {
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nestedInfoType := reflect.TypeOf(nodeInfoVal.Elem().Field(i).Interface())
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nestedInfoVal := reflect.ValueOf(nodeInfoVal.Elem().Field(i).Interface())
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nestedConfVal := reflect.ValueOf(valField.Interface())
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for j := 0; j < nestedInfoType.Elem().NumField(); j++ {
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nestedVal := nestedConfVal.Elem().FieldByName(nestedInfoType.Elem().Field(j).Name)
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if nestedVal.IsValid() {
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if nestedInfoVal.Elem().Field(j).Type() == reflect.TypeOf(Entry{}) {
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setter(nestedInfoVal.Elem().Field(j).Addr().Interface().(*Entry), nestedVal.String(), nameArg)
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} else if nestedInfoVal.Elem().Field(j).Type() == reflect.TypeOf(map[string](*Entry){}) {
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confMap := nestedVal.Interface().(map[string]string)
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if nestedInfoVal.Elem().Field(j).IsNil() {
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ptr := nestedInfoVal.Elem().Field(j).Addr().Interface().(*map[string](*Entry))
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*ptr = make(map[string]*Entry)
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}
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tagMap := nestedInfoVal.Elem().Field(j).Interface().(map[string](*Entry))
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for key, val := range confMap {
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if entr, ok := tagMap[key]; ok {
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setter(entr, val, nameArg)
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} else {
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entr := new(Entry)
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tagMap[key] = entr
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setter(entr, val, nameArg)
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}
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}
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}
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}
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}
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} else if nodeInfoType.Elem().Field(i).Type == reflect.TypeOf(map[string](*Entry)(nil)) {
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confMap := valField.Interface().(map[string]string)
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for key, val := range confMap {
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tagMap := nodeInfoVal.Elem().Field(i).Interface().(map[string](*Entry))
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if nodeInfoVal.Elem().Field(i).IsNil() {
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tagMap = make(map[string]*Entry)
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}
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if entr, ok := tagMap[key]; ok {
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setter(entr, val, nameArg)
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} else {
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entr := new(Entry)
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tagMap[key] = entr
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setter(entr, val, nameArg)
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}
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}
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} else if nodeInfoType.Elem().Field(i).Type == reflect.TypeOf(map[string](*NetDevEntry)(nil)) {
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netValMap := valField.Interface().(map[string](*NetDevs))
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for netName, netVals := range netValMap {
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netValsType := reflect.ValueOf(netVals)
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netMap := nodeInfoVal.Elem().Field(i).Interface().(map[string](*NetDevEntry))
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if nodeInfoVal.Elem().Field(i).IsNil() {
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netMap = make(map[string]*NetDevEntry)
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}
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if _, ok := netMap[netName]; !ok {
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var newNet NetDevEntry
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newNet.Tags = make(map[string]*Entry)
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netMap[netName] = &newNet
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}
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netInfoType := reflect.TypeOf(*netMap[netName])
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netInfoVal := reflect.ValueOf(netMap[netName])
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for j := 0; j < netInfoType.NumField(); j++ {
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netVal := netValsType.Elem().FieldByName(netInfoType.Field(j).Name)
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if netVal.IsValid() {
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if netVal.Type().Kind() == reflect.String {
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setter(netInfoVal.Elem().Field(j).Addr().Interface().((*Entry)), netVal.String(), nameArg)
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} else if netVal.Type() == reflect.TypeOf(map[string]string{}) {
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for key, val := range (netVal.Interface()).(map[string]string) {
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//netTagMap := netInfoVal.Elem().Field(j).Interface().((map[string](*Entry)))
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if _, ok := netInfoVal.Elem().Field(j).Interface().((map[string](*Entry)))[key]; !ok {
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netInfoVal.Elem().Field(j).Interface().((map[string](*Entry)))[key] = new(Entry)
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}
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setter(netInfoVal.Elem().Field(j).Interface().((map[string](*Entry)))[key], val, nameArg)
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}
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}
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}
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}
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}
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}
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}
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}
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}
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/*
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Flattens out a NodeConf, which means if there are no explicit values in *IpmiConf
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or *KernelConf, these pointer will set to nil. This will remove something like
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ipmi: {} from nodes.conf
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*/
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func (info *NodeConf) Flatten() {
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recursiveFlatten(info)
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}
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func recursiveFlatten(strct interface{}) {
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confType := reflect.TypeOf(strct)
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confVal := reflect.ValueOf(strct)
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for j := 0; j < confType.Elem().NumField(); j++ {
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if confVal.Elem().Field(j).Type().Kind() == reflect.Ptr && !confVal.Elem().Field(j).IsNil() {
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// iterate now over the ptr fields
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setToNil := true
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nestedType := reflect.TypeOf(confVal.Elem().Field(j).Interface())
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nestedVal := reflect.ValueOf(confVal.Elem().Field(j).Interface())
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for i := 0; i < nestedType.Elem().NumField(); i++ {
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if nestedType.Elem().Field(i).Type.Kind() == reflect.String &&
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nestedVal.Elem().Field(i).Interface().(string) != "" {
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setToNil = false
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} else if nestedType.Elem().Field(i).Type == reflect.TypeOf([]string{}) &&
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len(nestedVal.Elem().Field(i).Interface().([]string)) != 0 {
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setToNil = false
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} else if nestedType.Elem().Field(i).Type == reflect.TypeOf(map[string]string{}) &&
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len(nestedVal.Elem().Field(i).Interface().(map[string]string)) != 0 {
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setToNil = false
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}
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}
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if setToNil {
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confVal.Elem().Field(j).Set(reflect.Zero(confVal.Elem().Field(j).Type()))
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}
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}
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}
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}
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/*
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Populates all fields of NetDevEntry with Set from the
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values of NetDevs.
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Actually not used, just for completeness.
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*/
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func (netDev *NetDevEntry) SetFrom(netYaml *NetDevs) {
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setWrap := func(entr *Entry, val string, nameArg string) {
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entr.Set(val)
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}
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setSliceWrap := func(entr *Entry, val []string, nameArg string) {
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entr.SetSlice(val)
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}
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netDev.setterFrom(netYaml, "", setWrap, setSliceWrap)
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}
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/*
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Populates all fields of NetDevEntry with SetAlt from the
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values of NetDevs. The string profileName is used to
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destermine from which source/NodeInfo the entry came
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from.
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Actually not used, just for completeness.
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*/
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func (netDev *NetDevEntry) SetAltFrom(netYaml *NetDevs, profileName string) {
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netDev.setterFrom(netYaml, profileName, (*Entry).SetAlt, (*Entry).SetAltSlice)
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}
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/*
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Populates all fields of NodeInfo with SetDefault from the
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values of NodeConf.
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*/
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func (netDev *NetDevEntry) SetDefFrom(netYaml *NetDevs) {
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setWrap := func(entr *Entry, val string, nameArg string) {
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entr.SetDefault(val)
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}
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setSliceWrap := func(entr *Entry, val []string, nameArg string) {
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entr.SetDefaultSlice(val)
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}
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netDev.setterFrom(netYaml, "", setWrap, setSliceWrap)
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}
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/*
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Abstract function for setting a NetDevEntry from a NetDevs
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*/
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func (netDev *NetDevEntry) setterFrom(netYaml *NetDevs, nameArg string,
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setter func(*Entry, string, string),
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setterSlice func(*Entry, []string, string)) {
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// check if netYaml is empty
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if netYaml == nil {
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netYaml = new(NetDevs)
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}
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netValues := reflect.ValueOf(netDev)
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netInfoType := reflect.TypeOf(*netYaml)
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netInfoVal := reflect.ValueOf(*netYaml)
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for j := 0; j < netInfoType.NumField(); j++ {
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netVal := netValues.Elem().FieldByName(netInfoType.Field(j).Name)
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if netVal.IsValid() {
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if netInfoVal.Field(j).Type().Kind() == reflect.String {
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setter(netVal.Addr().Interface().((*Entry)), netInfoVal.Field(j).String(), nameArg)
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} else if netVal.Type() == reflect.TypeOf(map[string]string{}) {
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// danger zone following code is not tested
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for key, val := range (netVal.Interface()).(map[string]string) {
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//netTagMap := netInfoVal.Elem().Field(j).Interface().((map[string](*Entry)))
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if _, ok := netInfoVal.Elem().Field(j).Interface().((map[string](*Entry)))[key]; !ok {
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netInfoVal.Elem().Field(j).Interface().((map[string](*Entry)))[key] = new(Entry)
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}
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setter(netInfoVal.Elem().Field(j).Interface().((map[string](*Entry)))[key], val, nameArg)
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}
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}
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}
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}
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}
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/*
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Create a string slice, where every element represents a yaml entry
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*/
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func (nodeConf *NodeConf) UnmarshalConf(excludeList []string) (lines []string) {
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nodeInfoType := reflect.TypeOf(nodeConf)
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nodeInfoVal := reflect.ValueOf(nodeConf)
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// now iterate of every field
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for i := 0; i < nodeInfoVal.Elem().NumField(); i++ {
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if nodeInfoType.Elem().Field(i).Tag.Get("lopt") != "" {
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if ymlStr, ok := getYamlString(nodeInfoType.Elem().Field(i), excludeList); ok {
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lines = append(lines, ymlStr...)
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}
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} else if nodeInfoType.Elem().Field(i).Type.Kind() == reflect.Ptr {
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nestType := reflect.TypeOf(nodeInfoVal.Elem().Field(i).Interface())
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if ymlStr, ok := getYamlString(nodeInfoType.Elem().Field(i), excludeList); ok {
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lines = append(lines, ymlStr...)
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}
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for j := 0; j < nestType.Elem().NumField(); j++ {
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if nestType.Elem().Field(j).Tag.Get("lopt") != "" &&
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!util.InSlice(excludeList, nestType.Elem().Field(j).Tag.Get("lopt")) {
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if ymlStr, ok := getYamlString(nestType.Elem().Field(j), excludeList); ok {
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for _, str := range ymlStr {
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lines = append(lines, " "+str)
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}
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}
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}
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}
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} else if nodeInfoType.Elem().Field(i).Type == reflect.TypeOf(map[string]*NetDevs(nil)) {
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netMap := nodeInfoVal.Elem().Field(i).Interface().(map[string]*NetDevs)
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// add a default network so that it can hold values
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key := "default"
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if len(netMap) == 0 {
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netMap[key] = new(NetDevs)
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} else {
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for keyIt := range netMap {
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key = keyIt
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break
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}
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}
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if ymlStr, ok := getYamlString(nodeInfoType.Elem().Field(i), excludeList); ok {
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lines = append(lines, ymlStr[0]+":", " "+key+":")
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netType := reflect.TypeOf(netMap[key])
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for j := 0; j < netType.Elem().NumField(); j++ {
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if ymlStr, ok := getYamlString(netType.Elem().Field(j), excludeList); ok {
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for _, str := range ymlStr {
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lines = append(lines, " "+str)
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}
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}
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} // lines
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} // this
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} //not
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} //do
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return lines
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}
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/*
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Get the string of the yaml tag
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*/
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func getYamlString(myType reflect.StructField, excludeList []string) ([]string, bool) {
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ymlStr := myType.Tag.Get("yaml")
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if len(strings.Split(ymlStr, ",")) > 1 {
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ymlStr = strings.Split(ymlStr, ",")[0]
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}
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if util.InSlice(excludeList, ymlStr) {
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return []string{""}, false
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} else if myType.Tag.Get("lopt") == "" && myType.Type.Kind() == reflect.String {
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return []string{""}, false
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}
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if myType.Type.Kind() == reflect.String {
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ymlStr += ": string"
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return []string{ymlStr}, true
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} else if myType.Type == reflect.TypeOf([]string{}) {
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return []string{ymlStr + ":", " - string"}, true
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} else if myType.Type == reflect.TypeOf(map[string]string{}) {
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return []string{ymlStr + ":", " key: value"}, true
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} else if myType.Type.Kind() == reflect.Ptr {
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return []string{ymlStr + ":"}, true
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}
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return []string{ymlStr}, true
|
|
}
|
|
|
|
/*
|
|
Set the field of the NodeConf with the given lopt name, returns true if the
|
|
field was found. String slices must be comma separated. Network must have the form
|
|
net.$NETNAME.lopt or netname.$NETNAME.lopt
|
|
*/
|
|
func (nodeConf *NodeConf) SetLopt(lopt string, value string) (found bool) {
|
|
found = false
|
|
nodeInfoType := reflect.TypeOf(nodeConf)
|
|
nodeInfoVal := reflect.ValueOf(nodeConf)
|
|
// try to find the normal fields, networks come later
|
|
for i := 0; i < nodeInfoVal.Elem().NumField(); i++ {
|
|
//fmt.Println(nodeInfoType.Elem().Field(i).Tag.Get("lopt"), lopt)
|
|
if nodeInfoType.Elem().Field(i).Tag.Get("lopt") == lopt {
|
|
if nodeInfoType.Elem().Field(i).Type.Kind() == reflect.String {
|
|
wwlog.Verbose("Found lopt %s mapping to %s, setting to %s\n",
|
|
lopt, nodeInfoType.Elem().Field(i).Name, value)
|
|
confVal := nodeInfoVal.Elem().Field(i).Addr().Interface().(*string)
|
|
*confVal = value
|
|
found = true
|
|
} else if nodeInfoType.Elem().Field(i).Type == reflect.TypeOf([]string{}) {
|
|
wwlog.Verbose("Found lopt %s mapping to %s, setting to %s\n",
|
|
lopt, nodeInfoType.Elem().Field(i).Name, value)
|
|
confVal := nodeInfoVal.Elem().Field(i).Addr().Interface().(*[]string)
|
|
*confVal = strings.Split(value, ",")
|
|
found = true
|
|
}
|
|
}
|
|
}
|
|
// check network
|
|
loptSlice := strings.Split(lopt, ".")
|
|
wwlog.Debug("Trying to get network out of %s\n", loptSlice)
|
|
if !found && len(loptSlice) == 3 && (loptSlice[0] == "net" || loptSlice[0] == "network" || loptSlice[0] == "netname") {
|
|
if nodeConf.NetDevs == nil {
|
|
nodeConf.NetDevs = make(map[string]*NetDevs)
|
|
}
|
|
if nodeConf.NetDevs[loptSlice[1]] == nil {
|
|
nodeConf.NetDevs[loptSlice[1]] = new(NetDevs)
|
|
}
|
|
netInfoType := reflect.TypeOf(nodeConf.NetDevs[loptSlice[1]])
|
|
netInfoVal := reflect.ValueOf(nodeConf.NetDevs[loptSlice[1]])
|
|
for i := 0; i < netInfoVal.Elem().NumField(); i++ {
|
|
if netInfoType.Elem().Field(i).Tag.Get("lopt") == loptSlice[2] {
|
|
if netInfoType.Elem().Field(i).Type.Kind() == reflect.String {
|
|
wwlog.Verbose("Found lopt %s for network %s mapping to %s, setting to %s\n",
|
|
lopt, loptSlice[1], netInfoType.Elem().Field(i).Name, value)
|
|
confVal := netInfoVal.Elem().Field(i).Addr().Interface().(*string)
|
|
*confVal = value
|
|
found = true
|
|
} else if netInfoType.Elem().Field(i).Type == reflect.TypeOf([]string{}) {
|
|
wwlog.Verbose("Found lopt %s for network %s mapping to %s, setting to %s\n",
|
|
lopt, loptSlice[1], netInfoType.Elem().Field(i).Name, value)
|
|
confVal := netInfoVal.Elem().Field(i).Addr().Interface().(*[]string)
|
|
*confVal = strings.Split(value, ",")
|
|
found = true
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return found
|
|
}
|