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Annotation of truecrypt/driver/encryptedioqueue.h, revision 1.1

1.1     ! root        1: /*
        !             2:  Copyright (c) 2008 TrueCrypt Foundation. All rights reserved.
        !             3: 
        !             4:  Governed by the TrueCrypt License 2.4 the full text of which is contained
        !             5:  in the file License.txt included in TrueCrypt binary and source code
        !             6:  distribution packages.
        !             7: */
        !             8: 
        !             9: #ifndef TC_HEADER_DRIVER_ENCRYPTED_IO_QUEUE
        !            10: #define TC_HEADER_DRIVER_ENCRYPTED_IO_QUEUE
        !            11: 
        !            12: #include "TCdefs.h"
        !            13: #include "Apidrvr.h"
        !            14: 
        !            15: #define TC_ENC_IO_QUEUE_MAX_FRAGMENT_SIZE (64 * 512)
        !            16: 
        !            17: typedef struct
        !            18: {
        !            19:        PDEVICE_OBJECT DeviceObject;
        !            20:        
        !            21:        CRYPTO_INFO *CryptoInfo;
        !            22:        
        !            23:        // File-handle-based IO
        !            24:        HANDLE HostFileHandle;
        !            25:        int64 VirtualDeviceLength;
        !            26: 
        !            27:        // Filter device
        !            28:        BOOL IsFilterDevice;
        !            29:        PDEVICE_OBJECT LowerDeviceObject;
        !            30:        int64 EncryptedAreaStart;
        !            31:        int64 EncryptedAreaEnd;
        !            32:        IO_REMOVE_LOCK RemoveLock;
        !            33: 
        !            34:        // Main tread
        !            35:        PKTHREAD MainThread;
        !            36:        LIST_ENTRY MainThreadQueue;
        !            37:        KSPIN_LOCK MainThreadQueueLock;
        !            38:        KEVENT MainThreadQueueNotEmptyEvent;
        !            39: 
        !            40:        // IO thread
        !            41:        PKTHREAD IoThread;
        !            42:        LIST_ENTRY IoThreadQueue;
        !            43:        KSPIN_LOCK IoThreadQueueLock;
        !            44:        KEVENT IoThreadQueueNotEmptyEvent;
        !            45: 
        !            46:        // Completion thread
        !            47:        PKTHREAD CompletionThread;
        !            48:        LIST_ENTRY CompletionThreadQueue;
        !            49:        KSPIN_LOCK CompletionThreadQueueLock;
        !            50:        KEVENT CompletionThreadQueueNotEmptyEvent;
        !            51: 
        !            52:        byte *FragmentBufferA;
        !            53:        byte *FragmentBufferB;
        !            54:        KEVENT FragmentBufferAFreeEvent;
        !            55:        KEVENT FragmentBufferBFreeEvent;
        !            56: 
        !            57:        LONG OutstandingIoCount;
        !            58:        KEVENT NoOutstandingIoEvent;
        !            59:        
        !            60:        __int64 TotalBytesRead;
        !            61:        __int64 TotalBytesWritten;
        !            62: 
        !            63:        volatile BOOL ThreadExitRequested;
        !            64:        
        !            65:        volatile BOOL Suspended;
        !            66:        volatile BOOL SuspendPending;
        !            67:        volatile BOOL StopPending;
        !            68: 
        !            69:        KEVENT QueueResumedEvent;
        !            70: 
        !            71: }  EncryptedIoQueue;
        !            72: 
        !            73: 
        !            74: typedef struct
        !            75: {
        !            76:        EncryptedIoQueue *Queue;
        !            77:        PIRP OriginalIrp;
        !            78:        BOOL Write;
        !            79:        ULONG OriginalLength;
        !            80:        LARGE_INTEGER OriginalOffset;
        !            81:        KEVENT IoRequestCompletedEvent;
        !            82:        NTSTATUS Status;
        !            83:        LIST_ENTRY ListEntry;
        !            84:        __int64 DebugOffset;
        !            85: } EncryptedIoQueueItem;
        !            86: 
        !            87: 
        !            88: typedef struct
        !            89: {
        !            90:        EncryptedIoQueueItem *Item;
        !            91: 
        !            92:        BOOL CompleteOriginalIrp;
        !            93:        LARGE_INTEGER Offset;
        !            94:        ULONG Length;
        !            95:        int64 EncryptedOffset;
        !            96:        ULONG EncryptedLength;
        !            97:        byte *Data;
        !            98:        byte *OrigDataBufferFragment;
        !            99: 
        !           100:        LIST_ENTRY ListEntry;
        !           101:        LIST_ENTRY CompletionListEntry;
        !           102: } EncryptedIoRequest;
        !           103: 
        !           104: 
        !           105: NTSTATUS EncryptedIoQueueAddIrp (EncryptedIoQueue *queue, PIRP irp);
        !           106: BOOL EncryptedIoQueueIsRunning (EncryptedIoQueue *queue);
        !           107: BOOL EncryptedIoQueueIsSuspended (EncryptedIoQueue *queue);
        !           108: NTSTATUS EncryptedIoQueueResumeFromHold (EncryptedIoQueue *queue);
        !           109: NTSTATUS EncryptedIoQueueStart (EncryptedIoQueue *queue);
        !           110: NTSTATUS EncryptedIoQueueStop (EncryptedIoQueue *queue);
        !           111: NTSTATUS EncryptedIoQueueHoldWhenIdle (EncryptedIoQueue *queue, int64 timeout);
        !           112: 
        !           113: 
        !           114: #endif // TC_HEADER_DRIVER_ENCRYPTED_IO_QUEUE

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