e2e: add test cases for pvc-pvcClone chain with depth 2

Signed-off-by: Rakshith R <rar@redhat.com>

e2e/rbd.go

@@ -1942,6 +1942,106 @@ var _ = Describe("RBD", func() {
 					validateRBDImageCount(f, 0, defaultRBDPool)
 				})
 
+			By("validate PVC Clone chained with depth 2", func() {
+				// snapshot beta is only supported from v1.17+
+				if !k8sVersionGreaterEquals(f.ClientSet, 1, 17) {
+					Skip("pvc restore is only supported from v1.17+")
+				}
+				cloneChainDepth := 2
+
+				err := deleteResource(rbdExamplePath + "storageclass.yaml")
+				if err != nil {
+					e2elog.Failf("failed to delete storageclass with error %v", err)
+				}
+
+				err = createRBDStorageClass(
+					f.ClientSet,
+					f,
+					defaultSCName,
+					nil,
+					map[string]string{
+						"encrypted":       "true",
+						"encryptionKMSID": "vault-test",
+					},
+					deletePolicy)
+				if err != nil {
+					e2elog.Failf("failed to create storageclass with error %v", err)
+				}
+				defer func() {
+					err = deleteResource(rbdExamplePath + "storageclass.yaml")
+					if err != nil {
+						e2elog.Failf("failed to delete storageclass with error %v", err)
+					}
+					err = createRBDStorageClass(f.ClientSet, f, defaultSCName, nil, nil, deletePolicy)
+					if err != nil {
+						e2elog.Failf("failed to create storageclass with error %v", err)
+					}
+				}()
+
+				// create PVC and bind it to an app
+				pvc, err := loadPVC(pvcPath)
+				if err != nil {
+					e2elog.Failf("failed to load PVC with error %v", err)
+				}
+
+				pvc.Namespace = f.UniqueName
+				app, err := loadApp(appPath)
+				if err != nil {
+					e2elog.Failf("failed to load application with error %v", err)
+				}
+				app.Namespace = f.UniqueName
+				err = createPVCAndApp("", f, pvc, app, deployTimeout)
+				if err != nil {
+					e2elog.Failf("failed to create PVC and application with error %v", err)
+				}
+				// validate created backend rbd images
+				validateRBDImageCount(f, 1, defaultRBDPool)
+
+				for i := 0; i < cloneChainDepth; i++ {
+					var pvcClone *v1.PersistentVolumeClaim
+					pvcClone, err = loadPVC(pvcSmartClonePath)
+					if err != nil {
+						e2elog.Failf("failed to load PVC with error %v", err)
+					}
+
+					// create clone PVC
+					pvcClone.Name = fmt.Sprintf("%s-%d", pvcClone.Name, i)
+					pvcClone.Namespace = f.UniqueName
+					pvcClone.Spec.DataSource.Name = pvc.Name
+					err = createPVCAndvalidatePV(f.ClientSet, pvcClone, deployTimeout)
+					if err != nil {
+						e2elog.Failf("failed to create PVC with error %v", err)
+					}
+
+					// delete parent PVC
+					err = deletePVCAndApp("", f, pvc, app)
+					if err != nil {
+						e2elog.Failf("failed to delete PVC and application with error %v", err)
+					}
+
+					app.Spec.Volumes[0].PersistentVolumeClaim.ClaimName = pvcClone.Name
+					// create application
+					err = createApp(f.ClientSet, app, deployTimeout)
+					if err != nil {
+						e2elog.Failf("failed to create application with error %v", err)
+					}
+
+					pvc = pvcClone
+				}
+
+				err = deletePod(app.Name, app.Namespace, f.ClientSet, deployTimeout)
+				if err != nil {
+					e2elog.Failf("failed to delete application with error %v", err)
+				}
+				// delete PVC clone
+				err = deletePVCAndValidatePV(f.ClientSet, pvc, deployTimeout)
+				if err != nil {
+					e2elog.Failf("failed to delete PVC with error %v", err)
+				}
+				// validate created backend rbd images
+				validateRBDImageCount(f, 0, defaultRBDPool)
+			})
+
 			By("ensuring all operations will work within a rados namespace", func() {
 				updateConfigMap := func(radosNS string) {
 					radosNamespace = radosNS