src/storage/volume_image/fvm/options.h

// Copyright 2020 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef SRC_STORAGE_VOLUME_IMAGE_FVM_OPTIONS_H_
#define SRC_STORAGE_VOLUME_IMAGE_FVM_OPTIONS_H_

#include <cstdint>
#include <optional>

namespace storage::volume_image {

// Sets the desired properties of the expected FVM.
struct FvmOptions {
  // If set, fvm creation should fail if the size exceeds this hard limit.
  std::optional<uint64_t> max_size = std::nullopt;

  // If set, the fvm will preallocate enough metadata space to address |preallocated_size|.
  std::optional<uint64_t> preallocated_size = std::nullopt;

  // Slice size used for the fvm image.
  // Must be non-zero.
  uint64_t slice_size = 0;
};

}  // namespace storage::volume_image

#endif  // SRC_STORAGE_VOLUME_IMAGE_FVM_OPTIONS_H_