Ineffassign fixes for pkg/volume

hack/.staticcheck_failures

@@ -20,7 +20,6 @@ pkg/registry/core/service/storage
 pkg/util/coverage
 pkg/volume
 pkg/volume/azure_dd
-pkg/volume/azure_file
 pkg/volume/csi
 pkg/volume/fc
 pkg/volume/flexvolume
@@ -35,7 +34,6 @@ pkg/volume/storageos
 pkg/volume/util
 pkg/volume/util/fsquota
 pkg/volume/util/fsquota/common
-pkg/volume/util/operationexecutor
 pkg/volume/util/subpath
 pkg/volume/vsphere_volume
 test/e2e/apps

pkg/volume/azure_file/azure_file.go

@@ -114,6 +114,11 @@ func (plugin *azureFilePlugin) newMounterInternal(spec *volume.Spec, pod *v1.Pod
 		return nil, err
 	}
 	secretName, secretNamespace, err := getSecretNameAndNamespace(spec, pod.Namespace)
+	if err != nil {
+		// Log-and-continue instead of returning an error for now
+		// due to unspecified backwards compatibility concerns (a subject to revise)
+		klog.Errorf("get secret name and namespace from pod(%s) return with error: %v", pod.Name, err)
+	}
 	return &azureFileMounter{
 		azureFile: &azureFile{
 			volName:         spec.Name(),
@@ -257,15 +262,14 @@ func (b *azureFileMounter) SetUpAt(dir string, mounterArgs volume.MounterArgs) e
 			klog.Errorf("azureFile - Unmount directory %s failed with %v", dir, err)
 			return err
 		}
-		notMnt = true
 	}
 
 	var accountKey, accountName string
 	if accountName, accountKey, err = b.util.GetAzureCredentials(b.plugin.host, b.secretNamespace, b.secretName); err != nil {
 		return err
 	}
 
-	mountOptions := []string{}
+	var mountOptions []string
 	source := ""
 	osSeparator := string(os.PathSeparator)
 	source = fmt.Sprintf("%s%s%s.file.%s%s%s", osSeparator, osSeparator, accountName, getStorageEndpointSuffix(b.plugin.host.GetCloudProvider()), osSeparator, b.shareName)

pkg/volume/iscsi/iscsi_util.go

@@ -362,7 +362,7 @@ func (util *ISCSIUtil) AttachDisk(b iscsiDiskMounter) (string, error) {
 				}
 
 				// in case of node failure/restart, explicitly set to manual login so it doesn't hang on boot
-				out, err = execWithLog(b, "iscsiadm", "-m", "node", "-p", tp, "-T", b.Iqn, "-o", "update", "-n", "node.startup", "-v", "manual")
+				_, err = execWithLog(b, "iscsiadm", "-m", "node", "-p", tp, "-T", b.Iqn, "-o", "update", "-n", "node.startup", "-v", "manual")
 				if err != nil {
 					// don't fail if we can't set startup mode, but log warning so there is a clue
 					klog.Warningf("Warning: Failed to set iSCSI login mode to manual. Error: %v", err)

pkg/volume/rbd/rbd_util.go

@@ -355,7 +355,7 @@ func (util *RBDUtil) rbdUnlock(b rbdMounter) error {
 	if len(locker) > 0 {
 		args := []string{"lock", "remove", b.Image, lock_id, locker, "--pool", b.Pool, "--id", b.Id, "-m", mon}
 		args = append(args, secret_opt...)
-		cmd, err = b.exec.Command("rbd", args...).CombinedOutput()
+		_, err = b.exec.Command("rbd", args...).CombinedOutput()
 		if err == nil {
 			klog.V(4).Infof("rbd: successfully remove lock (locker_id: %s) on image: %s/%s with id %s mon %s", lock_id, b.Pool, b.Image, b.Id, mon)
 		} else {

pkg/volume/util/fsquota/project.go

@@ -89,7 +89,7 @@ func openAndLockProjectFiles() (*os.File, *os.File, error) {
 	fProjid, err := os.OpenFile(projidFile, os.O_RDONLY|os.O_CREATE, 0644)
 	if err == nil {
 		// Check once more, to ensure nothing got changed out from under us
-		if err := projFilesAreOK(); err == nil {
+		if err = projFilesAreOK(); err == nil {
 			err = lockFile(fProjects)
 			if err == nil {
 				err = lockFile(fProjid)
@@ -324,7 +324,7 @@ func createProjectID(path string, ID common.QuotaID) (common.QuotaID, error) {
 	if err == nil {
 		defer closeProjectFiles(fProjects, fProjid)
 		list := readProjectFiles(fProjects, fProjid)
-		writeProjid := true
+		var writeProjid bool
 		ID, writeProjid, err = addDirToProject(path, ID, &list)
 		if err == nil && ID != common.BadQuotaID {
 			if err = writeProjectFiles(fProjects, fProjid, writeProjid, list); err == nil {
@@ -345,7 +345,7 @@ func removeProjectID(path string, ID common.QuotaID) error {
 	if err == nil {
 		defer closeProjectFiles(fProjects, fProjid)
 		list := readProjectFiles(fProjects, fProjid)
-		writeProjid := true
+		var writeProjid bool
 		writeProjid, err = removeDirFromProject(path, ID, &list)
 		if err == nil {
 			if err = writeProjectFiles(fProjects, fProjid, writeProjid, list); err == nil {

pkg/volume/util/fsquota/quota_linux.go

@@ -226,6 +226,11 @@ func clearQuotaOnDir(m mount.Interface, path string) error {
 	// we explicitly have to check in this case.
 	klog.V(4).Infof("clearQuotaOnDir %s", path)
 	supportsQuotas, err := SupportsQuotas(m, path)
+	if err != nil {
+		// Log-and-continue instead of returning an error for now
+		// due to unspecified backwards compatibility concerns (a subject to revise)
+		klog.V(3).Infof("Attempt to check for quota support failed: %v", err)
+	}
 	if !supportsQuotas {
 		return nil
 	}
@@ -409,8 +414,12 @@ func ClearQuota(m mount.Interface, path string) error {
 	if !ok {
 		return fmt.Errorf("ClearQuota: No quota available for %s", path)
 	}
-	var err error
 	projid, err := getQuotaOnDir(m, path)
+	if err != nil {
+		// Log-and-continue instead of returning an error for now
+		// due to unspecified backwards compatibility concerns (a subject to revise)
+		klog.V(3).Infof("Attempt to check quota ID %v on dir %s failed: %v", dirQuotaMap[path], path, err)
+	}
 	if projid != dirQuotaMap[path] {
 		return fmt.Errorf("Expected quota ID %v on dir %s does not match actual %v", dirQuotaMap[path], path, projid)
 	}

pkg/volume/util/operationexecutor/operation_generator.go

@@ -653,7 +653,7 @@ func (og *operationGenerator) GenerateMountVolumeFunc(
 		//	- Volume does not support DeviceMounter interface.
 		//	- In case of CSI the volume does not have node stage_unstage capability.
 		if !resizeDone {
-			resizeDone, resizeError = og.nodeExpandVolume(volumeToMount, resizeOptions)
+			_, resizeError = og.nodeExpandVolume(volumeToMount, resizeOptions)
 			if resizeError != nil {
 				klog.Errorf("MountVolume.NodeExpandVolume failed with %v", resizeError)
 				return volumeToMount.GenerateError("MountVolume.Setup failed while expanding volume", resizeError)

pkg/volume/util/subpath/subpath_windows.go

@@ -267,7 +267,7 @@ func findExistingPrefix(base, pathname string) (string, []string, error) {
 
 	dirs := strings.Split(rel, string(filepath.Separator))
 
-	parent := base
+	var parent string
 	currentPath := base
 	for i, dir := range dirs {
 		parent = currentPath