private static IEnumerable <UsnJournalRecord> ReadJournal(NtFile volume, ulong start_usn, ulong end_usn, UsnJournalReasonFlags reason_mask, bool unprivileged) { if (volume is null) { throw new ArgumentNullException(nameof(volume)); } NtIoControlCode ioctl = unprivileged ? NtWellKnownIoControlCodes.FSCTL_READ_UNPRIVILEGED_USN_JOURNAL : NtWellKnownIoControlCodes.FSCTL_READ_USN_JOURNAL; Dictionary <long, Tuple <string, string> > ref_paths = new Dictionary <long, Tuple <string, string> >(); var data = QueryUsnJournalData(volume); end_usn = Math.Min(end_usn, data.NextUsn); using (var buffer = new SafeHGlobalBuffer(64 * 1024)) { while (start_usn < end_usn) { READ_USN_JOURNAL_DATA_V0 read_journal = new READ_USN_JOURNAL_DATA_V0 { ReasonMask = reason_mask, StartUsn = start_usn, UsnJournalID = data.UsnJournalID }; using (var in_buffer = read_journal.ToBuffer()) { int length = volume.FsControl(ioctl, in_buffer, buffer); int offset = 8; if (length < 8) { yield break; } start_usn = buffer.Read <ulong>(0); while (offset < length) { var header = buffer.Read <USN_RECORD_COMMON_HEADER>((ulong)offset); if (header.MajorVersion == 2 && header.MinorVersion == 0) { var entry = new UsnJournalRecord(buffer.GetStructAtOffset <USN_RECORD_V2>(offset), volume, ref_paths); if (entry.Usn >= end_usn) { break; } yield return(entry); } offset += header.RecordLength; } } } } }
private static void CheckForFault(SafeHGlobalBuffer buffer, LRPC_MESSAGE_TYPE message_type) { var header = buffer.Read <LRPC_HEADER>(0); if (header.MessageType != LRPC_MESSAGE_TYPE.lmtFault && header.MessageType != message_type) { throw new ArgumentException($"Invalid response message type {header.MessageType}"); } if (header.MessageType == LRPC_MESSAGE_TYPE.lmtFault) { var fault = buffer.GetStructAtOffset <LRPC_FAULT_MESSAGE>(0); throw new RpcFaultException(fault); } }