file_get_file_references

file_get_file_references(FileInterface $file, FieldDefinitionInterface $field = NULL, $age = EntityStorageInterface::FIELD_LOAD_REVISION, $field_type = 'file')

function file_get_file_references(FileInterface $file, FieldDefinitionInterface $field = NULL, $age = EntityStorageInterface::FIELD_LOAD_REVISION, $field_type = 'file') {
  $references = &drupal_static(__FUNCTION__, array());
  $field_columns = &drupal_static(__FUNCTION__ . ':field_columns', array());

  // Fill the static cache, disregard $field and $field_type for now.
  if (!isset($references[$file->id()][$age])) {
    $references[$file->id()][$age] = array();
    $usage_list = \Drupal::service('file.usage')->listUsage($file);
    $file_usage_list = isset($usage_list['file']) ? $usage_list['file'] : array();
    foreach ($file_usage_list as $entity_type_id => $entity_ids) {
      $entities = \Drupal::entityTypeManager()
        ->getStorage($entity_type_id)->loadMultiple(array_keys($entity_ids));
      foreach ($entities as $entity) {
        $bundle = $entity->bundle();
        // We need to find file fields for this entity type and bundle.
        if (!isset($file_fields[$entity_type_id][$bundle])) {
          $file_fields[$entity_type_id][$bundle] = array();
          // This contains the possible field names.
          foreach ($entity->getFieldDefinitions() as $field_name => $field_definition) {
            // If this is the first time this field type is seen, check
            // whether it references files.
            if (!isset($field_columns[$field_definition->getType()])) {
              $field_columns[$field_definition->getType()] = file_field_find_file_reference_column($field_definition);
            }
            // If the field type does reference files then record it.
            if ($field_columns[$field_definition->getType()]) {
              $file_fields[$entity_type_id][$bundle][$field_name] = $field_columns[$field_definition->getType()];
            }
          }
        }
        foreach ($file_fields[$entity_type_id][$bundle] as $field_name => $field_column) {
          // Iterate over the field items to find the referenced file and field
          // name. This will fail if the usage checked is in a non-current
          // revision because field items are from the current
          // revision.
          // We also iterate over all translations because a file can be linked
          // to a language other than the default.
          foreach ($entity->getTranslationLanguages() as $langcode => $language) {
            foreach ($entity->getTranslation($langcode)->get($field_name) as $item) {
              if ($file->id() == $item->{$field_column}) {
                $references[$file->id()][$age][$field_name][$entity_type_id][$entity->id()] = $entity;
                break;
              }
            }
          }
        }
      }
    }
  }
  $return = $references[$file->id()][$age];
  // Filter the static cache down to the requested entries. The usual static
  // cache is very small so this will be very fast.
  if ($field || $field_type) {
    foreach ($return as $field_name => $data) {
      foreach (array_keys($data) as $entity_type_id) {
        $field_storage_definitions = \Drupal::entityManager()->getFieldStorageDefinitions($entity_type_id);
        $current_field = $field_storage_definitions[$field_name];
        if (($field_type && $current_field->getType() != $field_type) || ($field && $field->uuid() != $current_field->uuid())) {
          unset($return[$field_name][$entity_type_id]);
        }
      }
    }
  }
  return $return;
}