base/files/drive_info_win.cc

// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "base/files/drive_info.h"

#include <windows.h>

#include <winioctl.h>

#include "base/files/file.h"
#include "base/files/file_path.h"

namespace base {

std::optional<DriveInfo> GetFileDriveInfo(const FilePath& path) {
  std::vector<FilePath::StringType> components = path.GetComponents();

  File volume(FilePath(L"\\\\.\\" + components[0]), File::FLAG_OPEN);
  if (!volume.IsValid()) {
    return std::nullopt;
  }
  DriveInfo info;

  STORAGE_PROPERTY_QUERY seek_query = {
      .PropertyId = StorageDeviceSeekPenaltyProperty,
      .QueryType = PropertyStandardQuery};
  DEVICE_SEEK_PENALTY_DESCRIPTOR seek_result = {};
  DWORD bytes_returned;
  BOOL success = ::DeviceIoControl(
      volume.GetPlatformFile(), IOCTL_STORAGE_QUERY_PROPERTY, &seek_query,
      sizeof(seek_query), &seek_result, sizeof(seek_result), &bytes_returned,
      /*lpOverlapped=*/nullptr);
  if (success && bytes_returned >= sizeof(seek_result)) {
    info.has_seek_penalty = seek_result.IncursSeekPenalty != FALSE;
  }

  STORAGE_PROPERTY_QUERY bus_query = {.PropertyId = StorageDeviceProperty,
                                      .QueryType = PropertyStandardQuery};
  STORAGE_DEVICE_DESCRIPTOR bus_result = {};
  success = ::DeviceIoControl(
      volume.GetPlatformFile(), IOCTL_STORAGE_QUERY_PROPERTY, &bus_query,
      sizeof(bus_query), &bus_result, sizeof(bus_result), &bytes_returned,
      /*lpOverlapped=*/nullptr);
  if (success && bytes_returned >= sizeof(bus_result)) {
    info.is_usb = bus_result.BusType == BusTypeUsb;
    info.is_removable = bus_result.RemovableMedia == TRUE;
  }

  STORAGE_PROPERTY_QUERY alignment_query = {
      .PropertyId = StorageAccessAlignmentProperty,
      .QueryType = PropertyStandardQuery};
  STORAGE_ACCESS_ALIGNMENT_DESCRIPTOR alignment = {};
  success = ::DeviceIoControl(
      volume.GetPlatformFile(), IOCTL_STORAGE_QUERY_PROPERTY, &alignment_query,
      sizeof(alignment_query), &alignment, sizeof(alignment), &bytes_returned,
      /*lpOverlapped=*/nullptr);
  if (success && bytes_returned >= sizeof(alignment)) {
    info.bytes_per_sector = alignment.BytesPerPhysicalSector;
  }

  PARTITION_INFORMATION_EX partition_info = {};
  success = ::DeviceIoControl(volume.GetPlatformFile(),
                              IOCTL_DISK_GET_PARTITION_INFO_EX, nullptr, 0,
                              &partition_info, sizeof(partition_info),
                              &bytes_returned, /*lpOverlapped=*/nullptr);
  if (success && bytes_returned >= sizeof(partition_info)) {
    info.size_bytes = partition_info.PartitionLength.QuadPart;
  }

  return info;
}

}  // namespace base