save source size for PVB

Signed-off-by: Lyndon-Li <lyonghui@vmware.com>

internal/volume/volumes_information.go

@@ -280,6 +280,9 @@ type PodVolumeBackupInfo struct {
 	// the uploader reported no figure; a pointer to 0 means it transferred nothing.
 	IncrementalSize *int64 `json:"incrementalSize,omitempty"`
 
+	// The size of source volume, for backup only
+	SourceSize int64 `json:"sourceSize,omitempty"`
+
 	// The type of the uploader that uploads the data. The valid values are `kopia` and `restic`.
 	UploaderType string `json:"uploaderType"`
 
@@ -342,6 +345,7 @@ func newPodVolumeInfoFromPVB(pvb *velerov1api.PodVolumeBackup) *PodVolumeBackupI
 		SnapshotHandle:  pvb.Status.SnapshotID,
 		Size:            pvb.Status.Progress.TotalBytes,
 		IncrementalSize: pvb.Status.IncrementalBytes,
+		SourceSize:      pvb.Status.SourceSize,
 		UploaderType:    pvb.Spec.UploaderType,
 		VolumeName:      pvb.Spec.Volume,
 		PodName:         pvb.Spec.Pod.Name,

pkg/apis/velero/v1/pod_volume_backup_types.go

@@ -132,6 +132,10 @@ type PodVolumeBackupStatus struct {
 	// +optional
 	IncrementalBytes *int64 `json:"incrementalBytes,omitempty"`
 
+	// SourceSize holds the total size of the source volume.
+	// +optional
+	SourceSize int64 `json:"sourceSize,omitempty"`
+
 	// AcceptedTimestamp records the time the pod volume backup is to be prepared.
 	// The server's time is used for AcceptedTimestamp
 	// +optional

pkg/controller/pod_volume_backup_controller.go

@@ -551,6 +551,7 @@ func (r *PodVolumeBackupReconciler) OnDataPathCompleted(ctx context.Context, nam
 		pvb.Status.SnapshotID = result.Backup.SnapshotID
 		pvb.Status.CompletionTimestamp = &completionTime
 		pvb.Status.IncrementalBytes = result.Backup.IncrementalBytes
+		pvb.Status.SourceSize = result.Backup.SourceSize
 		if result.Backup.EmptySnapshot {
 			pvb.Status.Message = "volume was empty so no snapshot was taken"
 		}