feat(v2): update final progress after device is closed

longhorn/longhorn-6613

Signed-off-by: Chin-Ya Huang <chin-ya.huang@suse.com>

deltablock.go

@@ -934,8 +934,14 @@ func RestoreDeltaBlockBackupIncrementally(ctx context.Context, config *DeltaRest
 		return err
 	}
 	go func() {
+		var err error
+		finalProgress := 0
+
 		defer func() {
 			_ = deltaOps.CloseVolumeDev(volDev)
+
+			deltaOps.UpdateRestoreStatus(volDevName, finalProgress, err)
+
 			if unlockErr := lock.Unlock(); unlockErr != nil {
 				logrus.WithError(unlockErr).Warn("Failed to unlock")
 			}
@@ -948,18 +954,18 @@ func RestoreDeltaBlockBackupIncrementally(ctx context.Context, config *DeltaRest
 		// We want to truncate regular files, but not device
 		if stat.Mode().IsRegular() {
 			log.Infof("Truncate %v to size %v", volDevName, vol.Size)
-			if err := volDev.Truncate(vol.Size); err != nil {
-				deltaOps.UpdateRestoreStatus(volDevName, 0, err)
+			err = volDev.Truncate(vol.Size)
+			if err != nil {
 				return
 			}
 		}
 
-		if err := performIncrementalRestore(ctx, bsDriver, config, srcVolumeName, volDevPath, lastBackup, backup); err != nil {
-			deltaOps.UpdateRestoreStatus(volDevName, 0, err)
+		err = performIncrementalRestore(ctx, bsDriver, config, srcVolumeName, volDevPath, lastBackup, backup)
+		if err != nil {
 			return
 		}
 
-		deltaOps.UpdateRestoreStatus(volDevName, PROGRESS_PERCENTAGE_BACKUP_TOTAL, nil)
+		finalProgress = PROGRESS_PERCENTAGE_BACKUP_TOTAL
 	}()
 	return nil
 }