45 lines
1.3 KiB
C++
45 lines
1.3 KiB
C++
// Copyright 2015 The Chromium Authors
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "components/metrics/drive_metrics_provider.h"
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#include <windows.h>
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#include <winioctl.h>
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#include <vector>
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#include "base/files/file.h"
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#include "base/files/file_path.h"
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namespace metrics {
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// static
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bool DriveMetricsProvider::HasSeekPenalty(const base::FilePath& path,
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bool* has_seek_penalty) {
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std::vector<base::FilePath::StringType> components = path.GetComponents();
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base::File volume(base::FilePath(L"\\\\.\\" + components[0]),
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base::File::FLAG_OPEN);
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if (!volume.IsValid())
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return false;
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STORAGE_PROPERTY_QUERY query = {};
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query.QueryType = PropertyStandardQuery;
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query.PropertyId = StorageDeviceSeekPenaltyProperty;
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DEVICE_SEEK_PENALTY_DESCRIPTOR result;
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DWORD bytes_returned;
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BOOL success = DeviceIoControl(
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volume.GetPlatformFile(), IOCTL_STORAGE_QUERY_PROPERTY, &query,
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sizeof(query), &result, sizeof(result), &bytes_returned, nullptr);
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if (success == FALSE || bytes_returned < sizeof(result))
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return false;
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*has_seek_penalty = result.IncursSeekPenalty != FALSE;
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return true;
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}
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} // namespace metrics
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