rbd: add ParentInTrash parameter in rbdImage struct

e2e/rbd.go

@@ -3553,7 +3553,7 @@ var _ = Describe("RBD", func() {
 					validateRBDImageCount(f, 1, defaultRBDPool)
 					validateOmapCount(f, 1, rbdType, defaultRBDPool, volumesType)
 					for i := 0; i < snapChainDepth; i++ {
-						var pvcClone *v1.PersistentVolumeClaim
+						var pvcClone, smartClonePVC *v1.PersistentVolumeClaim
 						snap := getSnapshot(snapshotPath)
 						snap.Name = fmt.Sprintf("%s-%d", snap.Name, i)
 						snap.Namespace = f.UniqueName
@@ -3610,6 +3610,41 @@ var _ = Describe("RBD", func() {
 						validateOmapCount(f, 1, rbdType, defaultRBDPool, volumesType)
 						validateOmapCount(f, 0, rbdType, defaultRBDPool, snapsType)
 
+						// create pvc-pvc clone to validate pvc-pvc clone creation
+						// of child PVC created from a snapshot which no longer exits.
+						// Snapshot-> restore PVC -> delete Snapshot -> PVC-PVC clone.
+						smartClonePVC, err = loadPVC(pvcSmartClonePath)
+						if err != nil {
+							framework.Failf("failed to load smart clone PVC: %v", err)
+						}
+
+						smartClonePVC.Name = fmt.Sprintf("%s-%d", smartClonePVC.Name, i)
+						smartClonePVC.Namespace = f.UniqueName
+						smartClonePVC.Spec.DataSource.Name = pvcClone.Name
+						err = createPVCAndvalidatePV(f.ClientSet, smartClonePVC, deployTimeout)
+						if err != nil {
+							framework.Failf("failed to create smart clone PVC %q: %v",
+								smartClonePVC.Name, err)
+						}
+
+						// validate created backend rbd images = clone + smart clone + temp image
+						totalImages = 3
+						validateRBDImageCount(f, totalImages, defaultRBDPool)
+						validateOmapCount(f, 2, rbdType, defaultRBDPool, volumesType)
+						validateOmapCount(f, 0, rbdType, defaultRBDPool, snapsType)
+
+						err = deletePVCAndValidatePV(f.ClientSet, smartClonePVC, deployTimeout)
+						if err != nil {
+							framework.Failf("failed to delete smart clone PVC %q: %v",
+								smartClonePVC.Name, err)
+						}
+
+						// validate created backend rbd images = clone
+						totalImages = 1
+						validateRBDImageCount(f, totalImages, defaultRBDPool)
+						validateOmapCount(f, 1, rbdType, defaultRBDPool, volumesType)
+						validateOmapCount(f, 0, rbdType, defaultRBDPool, snapsType)
+
 						app.Spec.Volumes[0].PersistentVolumeClaim.ClaimName = pvcClone.Name
 						// create application
 						err = createApp(f.ClientSet, app, deployTimeout)

internal/rbd/rbd_util.go

@@ -146,6 +146,8 @@ type rbdImage struct {
 
 	// Set metadata on volume
 	EnableMetadata bool
+	// ParentInTrash indicates the parent image is in trash.
+	ParentInTrash bool
 }
 
 // rbdVolume represents a CSI volume and its RBD image specifics.
@@ -1615,6 +1617,7 @@ func (ri *rbdImage) getImageInfo() error {
 	} else {
 		ri.ParentName = parentInfo.Image.ImageName
 		ri.ParentPool = parentInfo.Image.PoolName
+		ri.ParentInTrash = parentInfo.Image.Trash
 	}
 	// Get image creation time
 	tm, err := image.GetCreateTimestamp()
@@ -1633,7 +1636,9 @@ func (ri *rbdImage) getParent() (*rbdImage, error) {
 	if err != nil {
 		return nil, err
 	}
-	if ri.ParentName == "" {
+	// The image may not have a parent or the parent maybe in trash.
+	// Return nil in both the cases.
+	if ri.ParentName == "" || ri.ParentInTrash {
 		return nil, nil
 	}