handle corner cases for StorageID generation

controllers/utils/hash_test.go

@@ -21,3 +21,64 @@ func TestFnvHashTest(t *testing.T) {
 		}
 	}
 }
+
+func TestCalculateMD5Hash(t *testing.T) {
+	type args struct {
+		value any
+	}
+	tests := []struct {
+		name string
+		args args
+		want string
+	}{
+		{
+			name: "RBD with empty CephFSID",
+			args: args{
+				value: [2]string{"", ""},
+			},
+			want: "2432510f5993984b053e7d74ce53d94c",
+		},
+		{
+			name: "CephFS with empty CephFSID",
+			args: args{
+				value: [2]string{"", "csi"},
+			},
+			want: "793b48b9b17bdad5cd141e6daadfdd4e",
+		},
+		{
+			name: "C1/RBD",
+			args: args{
+				value: [2]string{"a0eaa723-bf87-48db-ad11-17e276edda61", ""},
+			},
+			want: "bb2361459436fd47121419c658d4c79b",
+		},
+		{
+			name: "C1/CephFS",
+			args: args{
+				value: [2]string{"a0eaa723-bf87-48db-ad11-17e276edda61", "csi"},
+			},
+			want: "41711cb35464e85f4446ace583adbaa1",
+		},
+		{
+			name: "C2/RBD",
+			args: args{
+				value: [2]string{"30dc85db-f35f-4c03-bb43-c8592487d8b9", ""},
+			},
+			want: "9e4fbb3d9e52875d6393409a51927243",
+		},
+		{
+			name: "C2/CephFS",
+			args: args{
+				value: [2]string{"30dc85db-f35f-4c03-bb43-c8592487d8b9", "csi"},
+			},
+			want: "4b7e331b508946ca7165f14804c37ffc",
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := CalculateMD5Hash(tt.args.value); got != tt.want {
+				t.Errorf("CalculateMD5Hash() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}

controllers/utils/storageclass.go

@@ -102,8 +102,11 @@ func CalculateStorageId(ctx context.Context, c client.Client, sc storagev1.Stora
 	}
 
 	cephClusterFSID := cephCluster.Status.CephStatus.FSID
-	var storageId string
+	if cephClusterFSID == "" {
+		return "", fmt.Errorf("failed to calculate StorageID. Ceph FSID is empty")
+	}
 
+	var storageId string
 	switch sc.Provisioner {
 	case fmt.Sprintf(RBDProvisionerTemplate, storageClusterNamespacedName.Namespace):
 		radosNamespaceName := DefaultRadosNamespace