1 // Copyright 2015 The Chromium Authors
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "components/metrics/drive_metrics_provider.h"
6
7 #include <windows.h>
8 #include <winioctl.h>
9 #include <vector>
10
11 #include "base/files/file.h"
12 #include "base/files/file_path.h"
13
14 namespace metrics {
15
16 // static
HasSeekPenalty(const base::FilePath & path,bool * has_seek_penalty)17 bool DriveMetricsProvider::HasSeekPenalty(const base::FilePath& path,
18 bool* has_seek_penalty) {
19 std::vector<base::FilePath::StringType> components = path.GetComponents();
20
21 base::File volume(base::FilePath(L"\\\\.\\" + components[0]),
22 base::File::FLAG_OPEN);
23 if (!volume.IsValid())
24 return false;
25
26 STORAGE_PROPERTY_QUERY query = {};
27 query.QueryType = PropertyStandardQuery;
28 query.PropertyId = StorageDeviceSeekPenaltyProperty;
29
30 DEVICE_SEEK_PENALTY_DESCRIPTOR result;
31 DWORD bytes_returned;
32
33 BOOL success = DeviceIoControl(
34 volume.GetPlatformFile(), IOCTL_STORAGE_QUERY_PROPERTY, &query,
35 sizeof(query), &result, sizeof(result), &bytes_returned, nullptr);
36
37 if (success == FALSE || bytes_returned < sizeof(result))
38 return false;
39
40 *has_seek_penalty = result.IncursSeekPenalty != FALSE;
41 return true;
42 }
43
44 } // namespace metrics
45