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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 "chrome/browser/metrics/drive_metrics_provider.h"
#include <windows.h>
#include <ntddscsi.h>
#include <winioctl.h>
#include <vector>
#include "base/files/file.h"
#include "base/files/file_path.h"
#include "base/macros.h"
#include "base/strings/stringprintf.h"
#include "base/win/windows_version.h"
namespace {
// Semi-copy of similarly named struct from ata.h in WinDDK.
struct IDENTIFY_DEVICE_DATA {
USHORT UnusedWords[217];
USHORT NominalMediaRotationRate;
USHORT MoreUnusedWords[38];
};
COMPILE_ASSERT(sizeof(IDENTIFY_DEVICE_DATA) == 512, IdentifyDeviceDataSize);
struct AtaRequest {
ATA_PASS_THROUGH_EX query;
IDENTIFY_DEVICE_DATA result;
};
} // namespace
// static
bool DriveMetricsProvider::HasSeekPenalty(const base::FilePath& path,
bool* has_seek_penalty) {
std::vector<base::FilePath::StringType> components;
path.GetComponents(&components);
int flags = base::File::FLAG_OPEN;
bool win7_or_higher = base::win::GetVersion() >= base::win::VERSION_WIN7;
if (!win7_or_higher)
flags |= base::File::FLAG_READ | base::File::FLAG_WRITE;
base::File volume(base::FilePath(L"\\\\.\\" + components[0]), flags);
if (!volume.IsValid())
return false;
if (win7_or_higher) {
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;
} else {
AtaRequest request = {};
request.query.AtaFlags = ATA_FLAGS_DATA_IN;
request.query.CurrentTaskFile[6] = ID_CMD;
request.query.DataBufferOffset = sizeof(request.query);
request.query.DataTransferLength = sizeof(request.result);
request.query.Length = sizeof(request.query);
request.query.TimeOutValue = 10;
DWORD bytes_returned;
BOOL success = DeviceIoControl(volume.GetPlatformFile(),
IOCTL_ATA_PASS_THROUGH,
&request, sizeof(request),
&request, sizeof(request),
&bytes_returned, NULL);
if (success == FALSE || bytes_returned < sizeof(request) ||
request.query.CurrentTaskFile[0]) {
return false;
}
*has_seek_penalty = request.result.NominalMediaRotationRate != 1;
}
return true;
}
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