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// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/metrics/drive_metrics_provider.h"
#include <windows.h>
#include <winioctl.h>
#include <vector>
#include "base/files/file.h"
#include "base/files/file_path.h"
#include "base/strings/stringprintf.h"
#include "base/win/windows_version.h"
namespace metrics {
// static
bool DriveMetricsProvider::HasSeekPenalty(const base::FilePath& path,
bool* has_seek_penalty) {
if (base::win::GetVersion() < base::win::VERSION_WIN7) {
// TODO(dbeam): re-enable XP and Vista detection in a utility process.
return false;
}
std::vector<base::FilePath::StringType> components;
path.GetComponents(&components);
base::File volume(base::FilePath(L"\\\\.\\" + components[0]),
base::File::FLAG_OPEN);
if (!volume.IsValid())
return false;
STORAGE_PROPERTY_QUERY query = {};
query.QueryType = PropertyStandardQuery;
query.PropertyId = StorageDeviceSeekPenaltyProperty;
DEVICE_SEEK_PENALTY_DESCRIPTOR result;
DWORD bytes_returned;
BOOL success = DeviceIoControl(
volume.GetPlatformFile(), IOCTL_STORAGE_QUERY_PROPERTY, &query,
sizeof(query), &result, sizeof(result), &bytes_returned, NULL);
if (success == FALSE || bytes_returned < sizeof(result))
return false;
*has_seek_penalty = result.IncursSeekPenalty != FALSE;
return true;
}
} // namespace metrics
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