//FsctlAllowExtendedDasdIo
//FsctlCreateOrGetObjectId
//FsctlDeleteObjectId
//FsctlDeleteReparsePoint
//FsctlDismountVolume
//FsctlDumpPropertyData
//FsctlEnableUpgrade
//FsctlEncryptionFsctlIo
//FsctlExtendVolume
/// <summary><see cref="http://msdn.microsoft.com/en-us/library/windows/desktop/aa364565(v=vs.85).aspx"/></summary>
public FileSystemStats[] FileSystemGetStatistics()
{
byte[] data = DeviceIoControlHelper.InvokeIoControlUnknownSize(Handle, IOControlCode.FsctlFileSystemGetStatistics, 512);
FileSystemStats[] res;
using (UnmanagedMemory mem = new UnmanagedMemory(data))
{
IntPtr currentDataPtr = mem;
FILESYSTEM_STATISTICS firstStats = (FILESYSTEM_STATISTICS)Marshal.PtrToStructure(currentDataPtr, typeof(FILESYSTEM_STATISTICS));
int fsStatsSize = Marshal.SizeOf(typeof(FILESYSTEM_STATISTICS));
int elementSize = (int)firstStats.SizeOfCompleteStructure;
int procCount = data.Length / elementSize;
res = new FileSystemStats[procCount];
for (int i = 0; i < procCount; i++)
{
res[i] = new FileSystemStats();
res[i].Stats = (FILESYSTEM_STATISTICS)Marshal.PtrToStructure(currentDataPtr, typeof(FILESYSTEM_STATISTICS));
switch (res[i].Stats.FileSystemType)
{
case FILESYSTEM_STATISTICS_TYPE.FILESYSTEM_STATISTICS_TYPE_NTFS:
NTFS_STATISTICS ntfsStats = (NTFS_STATISTICS)Marshal.PtrToStructure(currentDataPtr + fsStatsSize, typeof(NTFS_STATISTICS));
res[i].FSStats = ntfsStats;
break;
case FILESYSTEM_STATISTICS_TYPE.FILESYSTEM_STATISTICS_TYPE_FAT:
FAT_STATISTICS fatStats = (FAT_STATISTICS)Marshal.PtrToStructure(currentDataPtr + fsStatsSize, typeof(FAT_STATISTICS));
res[i].FSStats = fatStats;
break;
case FILESYSTEM_STATISTICS_TYPE.FILESYSTEM_STATISTICS_TYPE_EXFAT:
EXFAT_STATISTICS exFatStats = (EXFAT_STATISTICS)Marshal.PtrToStructure(currentDataPtr + fsStatsSize, typeof(EXFAT_STATISTICS));
res[i].FSStats = exFatStats;
break;
default:
throw new ArgumentOutOfRangeException();
}
currentDataPtr += elementSize;
}
}
return(res);
}
private static void ExampleFileSystemIO()
{
const string drive = @"\\.\C:";
Console.WriteLine(@"## Exmaple on {0} ##", drive);
SafeFileHandle volumeHandle = CreateFile(drive, FileAccess.ReadWrite, FileShare.ReadWrite, IntPtr.Zero, FileMode.Open, FileAttributes.Normal, IntPtr.Zero);
if (volumeHandle.IsInvalid)
{
int lastError = Marshal.GetLastWin32Error();
Console.WriteLine(@"!! Invalid {0}; Error ({1}): {2}", drive, lastError, new Win32Exception(lastError).Message);
Console.WriteLine();
return;
}
using (volumeHandle)
{
// Extract a complete file list from the target drive
IUSN_RECORD[] usnData;
using (UsnDeviceWrapper usnIo = new UsnDeviceWrapper(volumeHandle))
usnData = usnIo.FileSystemEnumUsnData();
Console.WriteLine("Found {0:N0} file/folder records", usnData.Length);
// Count the unique file names
int usnNameUniques = new HashSet <string>(usnData.Select(s => s.FileName)).Count;
Console.WriteLine("Found {0:N0} unique names on records", usnNameUniques);
// Prepare a dictionary to resolve parents
Dictionary <ulong, USN_RECORD_V2> usnDic = usnData.OfType <USN_RECORD_V2>().ToDictionary(s => s.FileReferenceNumber);
const string root = drive + "\\";
List <string> files = new List <string>();
List <string> parents = new List <string>();
foreach (USN_RECORD_V2 usnRecord in usnData.OfType <USN_RECORD_V2>())
{
parents.Clear();
USN_RECORD_V2 current = usnRecord;
while (usnDic.ContainsKey(current.ParentFileReferenceNumber))
{
current = usnDic[current.ParentFileReferenceNumber];
parents.Add(current.FileName);
}
parents.Reverse();
string path = Path.Combine(root, Path.Combine(parents.ToArray()), usnRecord.FileName);
files.Add(path);
}
// Sort all files in lexicographical order
files.Sort();
// FS Stats
FileSystemStats[] fsStats;
using (FilesystemDeviceWrapper fsIo = new FilesystemDeviceWrapper(volumeHandle))
fsStats = fsIo.FileSystemGetStatistics();
for (int i = 0; i < fsStats.Length; i++)
{
switch (fsStats[i].Stats.FileSystemType)
{
case FILESYSTEM_STATISTICS_TYPE.FILESYSTEM_STATISTICS_TYPE_NTFS:
NTFS_STATISTICS ntfsStats = (NTFS_STATISTICS)fsStats[i].FSStats;
Console.WriteLine("Processor {0}: (NTFS) MFT Reads/Writes: {1,7:N0} / {2,7:N0}", i, ntfsStats.MftReads, ntfsStats.MftWrites);
break;
case FILESYSTEM_STATISTICS_TYPE.FILESYSTEM_STATISTICS_TYPE_FAT:
FAT_STATISTICS fatStats = (FAT_STATISTICS)fsStats[i].FSStats;
Console.WriteLine("Processor {0}: (FAT) Noncached Disk Reads/Writes: {1,7:N0} / {2,7:N0}", i, fatStats.NonCachedDiskReads, fatStats.NonCachedDiskWrites);
break;
case FILESYSTEM_STATISTICS_TYPE.FILESYSTEM_STATISTICS_TYPE_EXFAT:
EXFAT_STATISTICS exfatStats = (EXFAT_STATISTICS)fsStats[i].FSStats;
Console.WriteLine("Processor {0}: (EXFAT) Noncached Disk Reads/Writes: {1,7:N0} / {2,7:N0}", i, exfatStats.NonCachedDiskReads, exfatStats.NonCachedDiskWrites);
break;
default:
throw new ArgumentOutOfRangeException();
}
}
// Bitmap
VOLUME_BITMAP_BUFFER bitmap;
using (FilesystemDeviceWrapper fsIo = new FilesystemDeviceWrapper(volumeHandle))
bitmap = fsIo.FileSystemGetVolumeBitmap(0);
Console.WriteLine("Bitmap: {0:N0} clusters", bitmap.Buffer.Length);
int trues = 0, falses = 0;
for (int i = 0; i < bitmap.Buffer.Length; i++)
{
if (bitmap.Buffer[i])
{
trues++;
}
else
{
falses++;
}
}
Console.WriteLine("Allocated clusters: {0:N0}", trues);
Console.WriteLine("Unallocated clusters: {0:N0}", falses);
// NTFS Base LCN (always 0)
RETRIEVAL_POINTER_BASE basePointer;
using (FilesystemDeviceWrapper fsIo = new FilesystemDeviceWrapper(volumeHandle))
basePointer = fsIo.FileSystemGetRetrievalPointerBase();
Console.WriteLine("Base LCN: {0:N0}", basePointer.FileAreaOffset);
}
Console.WriteLine();
}
