rbd: add ParentInTrash parameter in rbdImage struct

This commit adds ParentInTrash parameter in rbdImage struct
and makes use of it in getParent() function in order to avoid
error in case the parent is present but in trash.

Signed-off-by: Rakshith R <[email protected]>
(cherry picked from commit c34b31e)

internal/rbd/rbd_util.go

@@ -116,6 +116,8 @@ type rbdImage struct {
 	ParentName string
 	// Parent Pool is the pool that contains the parent image.
 	ParentPool string
+	// ParentInTrash indicates the parent image is in trash.
+	ParentInTrash bool
 	// Cluster name
 	ClusterName string
 
@@ -1613,6 +1615,7 @@ 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()
@@ -1631,7 +1634,9 @@ 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
 	}