Remove use of ioutil deprecated functions

use equivalent functions from os and io package

Signed-off-by: adrianc <[email protected]>

cmd/webhook/start.go

@@ -4,7 +4,7 @@ import (
 	"crypto/tls"
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net/http"
 
 	"github.com/fsnotify/fsnotify"
@@ -55,7 +55,7 @@ func init() {
 func serve(w http.ResponseWriter, r *http.Request, admit admitHandler) {
 	var body []byte
 	if r.Body != nil {
-		if data, err := ioutil.ReadAll(r.Body); err == nil {
+		if data, err := io.ReadAll(r.Body); err == nil {
 			body = data
 		}
 	}

pkg/daemon/daemon.go

@@ -6,7 +6,6 @@ import (
 	"encoding/json"
 	"flag"
 	"fmt"
-	"io/ioutil"
 	"math/rand"
 	"os"
 	"os/exec"
@@ -1056,7 +1055,7 @@ func tryCreateSwitchdevUdevRule(nodeState *sriovnetworkv1.SriovNetworkNodeState)
 		}
 	}
 
-	oldContent, err := ioutil.ReadFile(filePath)
+	oldContent, err := os.ReadFile(filePath)
 	// if oldContent = newContent, don't do anything
 	if err == nil && newContent == string(oldContent) {
 		return nil
@@ -1069,7 +1068,7 @@ func tryCreateSwitchdevUdevRule(nodeState *sriovnetworkv1.SriovNetworkNodeState)
 
 	// if the file does not exist or if oldContent != newContent
 	// write to file and create it if it doesn't exist
-	err = ioutil.WriteFile(filePath, []byte(newContent), 0664)
+	err = os.WriteFile(filePath, []byte(newContent), 0664)
 	if err != nil {
 		glog.Errorf("tryCreateSwitchdevUdevRule(): fail to write file: %v", err)
 		return err
@@ -1116,7 +1115,7 @@ func tryCreateNMUdevRule() error {
 	// add NM udev rules for renaming VF rep
 	newContent = newContent + "SUBSYSTEM==\"net\", ACTION==\"add|move\", ATTRS{phys_switch_id}!=\"\", ATTR{phys_port_name}==\"pf*vf*\", ENV{NM_UNMANAGED}=\"1\"\n"
 
-	oldContent, err := ioutil.ReadFile(filePath)
+	oldContent, err := os.ReadFile(filePath)
 	// if oldContent = newContent, don't do anything
 	if err == nil && newContent == string(oldContent) {
 		return nil
@@ -1135,7 +1134,7 @@ func tryCreateNMUdevRule() error {
 
 	// if the file does not exist or if oldContent != newContent
 	// write to file and create it if it doesn't exist
-	err = ioutil.WriteFile(filePath, []byte(newContent), 0666)
+	err = os.WriteFile(filePath, []byte(newContent), 0666)
 	if err != nil {
 		glog.Errorf("tryCreateNMUdevRule(): fail to write file: %v", err)
 		return err

pkg/daemon/daemon_test.go

@@ -3,7 +3,7 @@ package daemon
 import (
 	"context"
 	"flag"
-	"io/ioutil"
+	"os"
 	"path"
 	"testing"
 
@@ -321,7 +321,7 @@ func updateSriovNetworkNodeState(c snclientset.Interface, nodeState *sriovnetwor
 
 func assertFileContents(path, contents string) {
 	Eventually(func() (string, error) {
-		ret, err := ioutil.ReadFile(path)
+		ret, err := os.ReadFile(path)
 		return string(ret), err
 	}, "10s").WithOffset(1).Should(Equal(contents))
 }

pkg/plugins/k8s/k8s_plugin.go

@@ -2,7 +2,6 @@ package k8s
 
 import (
 	"fmt"
-	"io/ioutil"
 	"os"
 	"path"
 	"strings"
@@ -346,7 +345,7 @@ func (p *K8sPlugin) getSwitchDevSystemServices() []*service.Service {
 }
 
 func (p *K8sPlugin) isSwitchdevScriptNeedUpdate(scriptObj *service.ScriptManifestFile) (needUpdate bool, err error) {
-	data, err := ioutil.ReadFile(path.Join(chroot, scriptObj.Path))
+	data, err := os.ReadFile(path.Join(chroot, scriptObj.Path))
 	if err != nil {
 		if !os.IsNotExist(err) {
 			return false, err
@@ -457,23 +456,23 @@ func (p *K8sPlugin) updateSwitchdevService() error {
 	}
 
 	if p.updateTarget.switchdevBeforeNMRunScript {
-		err := ioutil.WriteFile(path.Join(chroot, p.switchdevBeforeNMRunScript.Path),
+		err := os.WriteFile(path.Join(chroot, p.switchdevBeforeNMRunScript.Path),
 			[]byte(p.switchdevBeforeNMRunScript.Contents.Inline), 0755)
 		if err != nil {
 			return err
 		}
 	}
 
 	if p.updateTarget.switchdevAfterNMRunScript {
-		err := ioutil.WriteFile(path.Join(chroot, p.switchdevAfterNMRunScript.Path),
+		err := os.WriteFile(path.Join(chroot, p.switchdevAfterNMRunScript.Path),
 			[]byte(p.switchdevAfterNMRunScript.Contents.Inline), 0755)
 		if err != nil {
 			return err
 		}
 	}
 
 	if p.updateTarget.switchdevUdevScript {
-		err := ioutil.WriteFile(path.Join(chroot, p.switchdevUdevScript.Path),
+		err := os.WriteFile(path.Join(chroot, p.switchdevUdevScript.Path),
 			[]byte(p.switchdevUdevScript.Contents.Inline), 0755)
 		if err != nil {
 			return err

pkg/render/render.go

@@ -4,7 +4,6 @@ import (
 	"bytes"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"sort"
@@ -120,7 +119,7 @@ func renderTemplate(path string, d *RenderData) (*bytes.Buffer, error) {
 	tmpl.Funcs(template.FuncMap{"getOr": getOr, "isSet": isSet})
 	tmpl.Funcs(sprig.TxtFuncMap())
 
-	source, err := ioutil.ReadFile(path)
+	source, err := os.ReadFile(path)
 	if err != nil {
 		return nil, errors.Wrapf(err, "failed to read manifest %s", path)
 	}

pkg/service/service_manager.go

@@ -1,7 +1,6 @@
 package service
 
 import (
-	"io/ioutil"
 	"os"
 	"os/exec"
 	"path"
@@ -43,7 +42,7 @@ func (sm *serviceManager) IsServiceExist(servicePath string) (bool, error) {
 
 // ReadService read service from given path
 func (sm *serviceManager) ReadService(servicePath string) (*Service, error) {
-	data, err := ioutil.ReadFile(path.Join(sm.chroot, servicePath))
+	data, err := os.ReadFile(path.Join(sm.chroot, servicePath))
 	if err != nil {
 		return nil, err
 	}
@@ -58,7 +57,7 @@ func (sm *serviceManager) ReadService(servicePath string) (*Service, error) {
 // EnableService creates service file and enables it with systemctl enable
 func (sm *serviceManager) EnableService(service *Service) error {
 	// Write service file
-	err := ioutil.WriteFile(path.Join(sm.chroot, service.Path), []byte(service.Content), 0644)
+	err := os.WriteFile(path.Join(sm.chroot, service.Path), []byte(service.Content), 0644)
 	if err != nil {
 		return err
 	}

pkg/service/utils.go

@@ -1,7 +1,8 @@
 package service
 
 import (
-	"io/ioutil"
+	"io"
+	"os"
 	"strings"
 
 	"github.com/coreos/go-systemd/v22/unit"
@@ -55,7 +56,7 @@ OUTER:
 		newServiceOptions = append(newServiceOptions, opt)
 	}
 
-	data, err := ioutil.ReadAll(unit.Serialize(newServiceOptions))
+	data, err := io.ReadAll(unit.Serialize(newServiceOptions))
 	if err != nil {
 		return nil, err
 	}
@@ -84,7 +85,7 @@ OUTER:
 		serviceOptions = append(serviceOptions, appendOpt)
 	}
 
-	data, err := ioutil.ReadAll(unit.Serialize(serviceOptions))
+	data, err := io.ReadAll(unit.Serialize(serviceOptions))
 	if err != nil {
 		return nil, err
 	}
@@ -98,7 +99,7 @@ OUTER:
 
 // ReadServiceInjectionManifestFile reads service injection file
 func ReadServiceInjectionManifestFile(path string) (*Service, error) {
-	data, err := ioutil.ReadFile(path)
+	data, err := os.ReadFile(path)
 	if err != nil {
 		return nil, err
 	}
@@ -117,7 +118,7 @@ func ReadServiceInjectionManifestFile(path string) (*Service, error) {
 
 // ReadServiceManifestFile reads service file
 func ReadServiceManifestFile(path string) (*Service, error) {
-	data, err := ioutil.ReadFile(path)
+	data, err := os.ReadFile(path)
 	if err != nil {
 		return nil, err
 	}
@@ -136,7 +137,7 @@ func ReadServiceManifestFile(path string) (*Service, error) {
 
 // ReadScriptManifestFile reads script file
 func ReadScriptManifestFile(path string) (*ScriptManifestFile, error) {
-	data, err := ioutil.ReadFile(path)
+	data, err := os.ReadFile(path)
 	if err != nil {
 		return nil, err
 	}

pkg/systemd/systemd.go

@@ -18,7 +18,6 @@ package systemd
 import (
 	"bytes"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"strings"
 
@@ -56,7 +55,7 @@ type SriovResult struct {
 }
 
 func ReadConfFile() (spec *SriovConfig, err error) {
-	rawConfig, err := ioutil.ReadFile(SriovSystemdConfigPath)
+	rawConfig, err := os.ReadFile(SriovSystemdConfigPath)
 	if err != nil {
 		return nil, err
 	}
@@ -101,7 +100,7 @@ func WriteConfFile(newState *sriovnetworkv1.SriovNetworkNodeState, unsupportedNi
 		}
 	}
 
-	oldContent, err := ioutil.ReadFile(SriovHostSystemdConfigPath)
+	oldContent, err := os.ReadFile(SriovHostSystemdConfigPath)
 	if err != nil {
 		glog.Errorf("WriteConfFile(): fail to read file: %v", err)
 		return false, err
@@ -128,7 +127,7 @@ func WriteConfFile(newState *sriovnetworkv1.SriovNetworkNodeState, unsupportedNi
 	glog.V(2).Infof("WriteConfFile(): previews configuration is not equal: old config:\n%s\nnew config:\n%s\n", string(oldContent), string(newContent))
 
 	glog.V(2).Infof("WriteConfFile(): write '%s' to %s", newContent, SriovHostSystemdConfigPath)
-	err = ioutil.WriteFile(SriovHostSystemdConfigPath, newContent, 0644)
+	err = os.WriteFile(SriovHostSystemdConfigPath, newContent, 0644)
 	if err != nil {
 		glog.Errorf("WriteConfFile(): fail to write file: %v", err)
 		return false, err
@@ -167,7 +166,7 @@ func WriteSriovResult(result *SriovResult) error {
 	}
 
 	glog.V(2).Infof("WriteSriovResult(): write '%s' to %s", string(out), SriovSystemdResultPath)
-	err = ioutil.WriteFile(SriovSystemdResultPath, out, 0644)
+	err = os.WriteFile(SriovSystemdResultPath, out, 0644)
 	if err != nil {
 		glog.Errorf("WriteSriovResult(): failed to write sriov result file on path %s: %v", SriovSystemdResultPath, err)
 		return err
@@ -188,7 +187,7 @@ func ReadSriovResult() (*SriovResult, error) {
 		}
 	}
 
-	rawConfig, err := ioutil.ReadFile(SriovHostSystemdResultPath)
+	rawConfig, err := os.ReadFile(SriovHostSystemdResultPath)
 	if err != nil {
 		glog.Errorf("ReadSriovResult(): failed to read sriov result file on path %s: %v", SriovHostSystemdResultPath, err)
 		return nil, err
@@ -224,7 +223,7 @@ func WriteSriovSupportedNics() error {
 		rawNicList = append(rawNicList, []byte(fmt.Sprintf("%s\n", line))...)
 	}
 
-	err = ioutil.WriteFile(sriovHostSystemdSupportedNicPath, rawNicList, 0644)
+	err = os.WriteFile(sriovHostSystemdSupportedNicPath, rawNicList, 0644)
 	if err != nil {
 		glog.Errorf("WriteSriovSupportedNics(): failed to write sriov supporter nics ids file on path %s: %v", sriovHostSystemdSupportedNicPath, err)
 		return err
@@ -245,7 +244,7 @@ func ReadSriovSupportedNics() ([]string, error) {
 		}
 	}
 
-	rawConfig, err := ioutil.ReadFile(sriovSystemdSupportedNicPath)
+	rawConfig, err := os.ReadFile(sriovSystemdSupportedNicPath)
 	if err != nil {
 		glog.Errorf("ReadSriovSupportedNics(): failed to read sriov supporter nics file on path %s: %v", sriovSystemdSupportedNicPath, err)
 		return nil, err

pkg/utils/driver.go

@@ -2,7 +2,6 @@ package utils
 
 import (
 	"fmt"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 
@@ -24,7 +23,7 @@ func Unbind(pciAddr string) error {
 	}
 
 	filePath := filepath.Join(sysBusPciDrivers, driver, "unbind")
-	err := ioutil.WriteFile(filePath, []byte(pciAddr), os.ModeAppend)
+	err := os.WriteFile(filePath, []byte(pciAddr), os.ModeAppend)
 	if err != nil {
 		glog.Errorf("Unbind(): fail to unbind driver for device %s. %s", pciAddr, err)
 		return err
@@ -49,13 +48,13 @@ func BindDpdkDriver(pciAddr, driver string) error {
 	}
 
 	driverOverridePath := filepath.Join(sysBusPciDevices, pciAddr, "driver_override")
-	err := ioutil.WriteFile(driverOverridePath, []byte(driver), os.ModeAppend)
+	err := os.WriteFile(driverOverridePath, []byte(driver), os.ModeAppend)
 	if err != nil {
 		glog.Errorf("BindDpdkDriver(): fail to write driver_override for device %s %s", driver, err)
 		return err
 	}
 	bindPath := filepath.Join(sysBusPciDrivers, driver, "bind")
-	err = ioutil.WriteFile(bindPath, []byte(pciAddr), os.ModeAppend)
+	err = os.WriteFile(bindPath, []byte(pciAddr), os.ModeAppend)
 	if err != nil {
 		glog.Errorf("BindDpdkDriver(): fail to bind driver for device %s: %s", pciAddr, err)
 		_, err := os.Readlink(filepath.Join(sysBusPciDevices, pciAddr, "iommu_group"))
@@ -65,7 +64,7 @@ func BindDpdkDriver(pciAddr, driver string) error {
 		}
 		return err
 	}
-	err = ioutil.WriteFile(driverOverridePath, []byte(""), os.ModeAppend)
+	err = os.WriteFile(driverOverridePath, []byte(""), os.ModeAppend)
 	if err != nil {
 		glog.Errorf("BindDpdkDriver(): fail to clear driver_override for device %s: %s", pciAddr, err)
 		return err
@@ -90,12 +89,12 @@ func BindDefaultDriver(pciAddr string) error {
 	}
 
 	driverOverridePath := filepath.Join(sysBusPciDevices, pciAddr, "driver_override")
-	err := ioutil.WriteFile(driverOverridePath, []byte("\x00"), os.ModeAppend)
+	err := os.WriteFile(driverOverridePath, []byte("\x00"), os.ModeAppend)
 	if err != nil {
 		glog.Errorf("BindDefaultDriver(): fail to write driver_override for device %s: %s", pciAddr, err)
 		return err
 	}
-	err = ioutil.WriteFile(sysBusPciDriversProbe, []byte(pciAddr), os.ModeAppend)
+	err = os.WriteFile(sysBusPciDriversProbe, []byte(pciAddr), os.ModeAppend)
 	if err != nil {
 		glog.Errorf("BindDefaultDriver(): fail to bind driver for device %s: %s", pciAddr, err)
 		return err

pkg/utils/sriov.go

@@ -19,7 +19,6 @@ import (
 	"bytes"
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
 	"os"
 
 	"github.com/golang/glog"
@@ -125,7 +124,7 @@ func WriteSwitchdevConfFile(newState *sriovnetworkv1.SriovNetworkNodeState) (upd
 			return
 		}
 	}
-	oldContent, err := ioutil.ReadFile(SriovHostSwitchDevConfPath)
+	oldContent, err := os.ReadFile(SriovHostSwitchDevConfPath)
 	if err != nil {
 		glog.Errorf("WriteSwitchdevConfFile(): fail to read file: %v", err)
 		return
@@ -145,7 +144,7 @@ func WriteSwitchdevConfFile(newState *sriovnetworkv1.SriovNetworkNodeState) (upd
 	}
 	update = true
 	glog.V(2).Infof("WriteSwitchdevConfFile(): write '%s' to switchdev.conf", newContent)
-	err = ioutil.WriteFile(SriovHostSwitchDevConfPath, newContent, 0644)
+	err = os.WriteFile(SriovHostSwitchDevConfPath, newContent, 0644)
 	if err != nil {
 		glog.Errorf("WriteSwitchdevConfFile(): fail to write file: %v", err)
 		return