unsafe public static bool QueryUSNJournal(IntPtr pVolume, out PInvokeWin32.USN_JOURNAL_DATA ujd, out uint bytesReturned)
{
bool bOK = PInvokeWin32.DeviceIoControl(
pVolume, PInvokeWin32.FSCTL_QUERY_USN_JOURNAL,
IntPtr.Zero,
0,
out ujd,
sizeof(PInvokeWin32.USN_JOURNAL_DATA),
out bytesReturned,
IntPtr.Zero
);
return(bOK);
}
unsafe private static void EnumerateFiles(string volumeName, IntPtr pVolume, IntPtr medBuffer, ref List <MyEverythingRecord> files, ref List <MyEverythingRecord> folders)
{
IntPtr pData = Marshal.AllocHGlobal(sizeof(UInt64) + 0x10000);
PInvokeWin32.ZeroMemory(pData, sizeof(UInt64) + 0x10000);
uint outBytesReturned = 0;
while (false != PInvokeWin32.DeviceIoControl(pVolume, PInvokeWin32.FSCTL_ENUM_USN_DATA, medBuffer,
sizeof(PInvokeWin32.MFT_ENUM_DATA), pData, sizeof(UInt64) + 0x10000, out outBytesReturned,
IntPtr.Zero))
{
IntPtr pUsnRecord = new IntPtr(pData.ToInt32() + sizeof(Int64));
while (outBytesReturned > 60)
{
PInvokeWin32.USN_RECORD usn = new PInvokeWin32.USN_RECORD(pUsnRecord);
if (usn.IsFolder)
{
folders.Add(new MyEverythingRecord {
Name = usn.FileName,
ParentFrn = usn.ParentFRN,
FRN = usn.FRN,
IsFolder = true, VolumeName = volumeName
});
}
else
{
files.Add(new MyEverythingRecord {
Name = usn.FileName,
ParentFrn = usn.ParentFRN,
FRN = usn.FRN,
IsFolder = false, VolumeName = volumeName
});
}
pUsnRecord = new IntPtr(pUsnRecord.ToInt32() + usn.RecordLength);
outBytesReturned -= usn.RecordLength;
}
Marshal.WriteInt64(medBuffer, Marshal.ReadInt64(pData, 0));
}
Marshal.FreeHGlobal(pData);
}
private void MonitorThread(object param)
{
MyEverythingDB db = (param as Dictionary <string, object>)["MyEverythingDB"] as MyEverythingDB;
string volume = (param as Dictionary <string, object>)["Volume"] as string;
IntPtr pbuffer = Marshal.AllocHGlobal(0x1000); // 构建输出参数
PInvokeWin32.READ_USN_JOURNAL_DATA rujd = SetupInputData4JournalRead(volume, 0xFFFFFFFF); // 对所有类型的reason都监听
UInt32 cbRead; // 用来存储实际输出的字节数
IntPtr prujd; // 指向输入参数结构体的指针
while (true)
{
// 构建输入参数的指针
prujd = Marshal.AllocHGlobal(Marshal.SizeOf(rujd));
PInvokeWin32.ZeroMemory(prujd, Marshal.SizeOf(rujd));
Marshal.StructureToPtr(rujd, prujd, true);
Debug.WriteLine(string.Format("\nMoniting on {0}......", volume));
IntPtr pVolume = MyEverything.GetVolumeJournalHandle(volume);
bool fok = PInvokeWin32.DeviceIoControl(pVolume,
PInvokeWin32.FSCTL_READ_USN_JOURNAL,
prujd, Marshal.SizeOf(typeof(PInvokeWin32.READ_USN_JOURNAL_DATA)),
pbuffer, 0x1000, out cbRead, IntPtr.Zero);
IntPtr pRealData = new IntPtr(pbuffer.ToInt32() + Marshal.SizeOf(typeof(Int64))); // 返回的内存块头上的8个字节是一个usn_id, 从第9个字节开始才是record.
uint offset = 0;
if (fok)
{
while (offset + Marshal.SizeOf(typeof(Int64)) < cbRead) // record可能有多个!
{
PInvokeWin32.USN_RECORD usn = new PInvokeWin32.USN_RECORD(new IntPtr(pRealData.ToInt32() + (int)offset));
ProcessUSN(usn, volume, db);
offset += usn.RecordLength;
}
}
Marshal.FreeHGlobal(prujd);
rujd.StartUsn = Marshal.ReadInt64(pbuffer); // 返回的内存块头上的8个字节就是用来在进行下一次查询的
}
}
unsafe public static void EnableVomuleJournal(IntPtr pVolume)
{
UInt64 MaximumSize = 0x800000;
UInt64 AllocationDelta = 0x100000;
UInt32 cb;
PInvokeWin32.CREATE_USN_JOURNAL_DATA cujd;
cujd.MaximumSize = MaximumSize;
cujd.AllocationDelta = AllocationDelta;
int sizeCujd = Marshal.SizeOf(cujd);
IntPtr cujdBuffer = Marshal.AllocHGlobal(sizeCujd);
PInvokeWin32.ZeroMemory(cujdBuffer, sizeCujd);
Marshal.StructureToPtr(cujd, cujdBuffer, true);
bool fOk = PInvokeWin32.DeviceIoControl(pVolume, PInvokeWin32.FSCTL_CREATE_USN_JOURNAL,
cujdBuffer, sizeCujd, IntPtr.Zero, 0, out cb, IntPtr.Zero);
if (!fOk)
{
throw new IOException("DeviceIoControl() returned false", new Win32Exception(Marshal.GetLastWin32Error()));
}
}
