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Annotation of truecrypt/driver/encryptedioqueue.h, revision 1.1.1.5

1.1       root        1: /*
                      2:  Copyright (c) 2008 TrueCrypt Foundation. All rights reserved.
                      3: 
1.1.1.5 ! root        4:  Governed by the TrueCrypt License 2.6 the full text of which is contained
1.1       root        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: 
1.1.1.5 ! root       15: #define TC_ENC_IO_QUEUE_MAX_FRAGMENT_SIZE (256 * 1024)
        !            16: #define TC_ENC_IO_QUEUE_MEM_ALLOC_RETRY_DELAY 5
1.1.1.4   root       17: #define TC_ENC_IO_QUEUE_MEM_ALLOC_TIMEOUT (60 * 1000)
1.1       root       18: 
                     19: typedef struct
                     20: {
                     21:        PDEVICE_OBJECT DeviceObject;
                     22:        
                     23:        CRYPTO_INFO *CryptoInfo;
                     24:        
                     25:        // File-handle-based IO
                     26:        HANDLE HostFileHandle;
                     27:        int64 VirtualDeviceLength;
1.1.1.5 ! root       28:        SECURITY_CLIENT_CONTEXT *SecurityClientContext;
1.1       root       29: 
                     30:        // Filter device
                     31:        BOOL IsFilterDevice;
                     32:        PDEVICE_OBJECT LowerDeviceObject;
                     33:        int64 EncryptedAreaStart;
                     34:        int64 EncryptedAreaEnd;
1.1.1.4   root       35:        BOOL RemapEncryptedArea;
                     36:        int64 RemappedAreaOffset;
                     37:        int64 RemappedAreaDataUnitOffset;
1.1       root       38:        IO_REMOVE_LOCK RemoveLock;
                     39: 
                     40:        // Main tread
                     41:        PKTHREAD MainThread;
                     42:        LIST_ENTRY MainThreadQueue;
                     43:        KSPIN_LOCK MainThreadQueueLock;
                     44:        KEVENT MainThreadQueueNotEmptyEvent;
                     45: 
                     46:        // IO thread
                     47:        PKTHREAD IoThread;
                     48:        LIST_ENTRY IoThreadQueue;
                     49:        KSPIN_LOCK IoThreadQueueLock;
                     50:        KEVENT IoThreadQueueNotEmptyEvent;
                     51: 
                     52:        // Completion thread
                     53:        PKTHREAD CompletionThread;
                     54:        LIST_ENTRY CompletionThreadQueue;
                     55:        KSPIN_LOCK CompletionThreadQueueLock;
                     56:        KEVENT CompletionThreadQueueNotEmptyEvent;
                     57: 
                     58:        byte *FragmentBufferA;
                     59:        byte *FragmentBufferB;
                     60:        KEVENT FragmentBufferAFreeEvent;
                     61:        KEVENT FragmentBufferBFreeEvent;
                     62: 
                     63:        LONG OutstandingIoCount;
                     64:        KEVENT NoOutstandingIoEvent;
                     65:        
1.1.1.3   root       66:        KEVENT RequestCompletedEvent;
                     67: 
1.1       root       68:        __int64 TotalBytesRead;
                     69:        __int64 TotalBytesWritten;
                     70: 
                     71:        volatile BOOL ThreadExitRequested;
                     72:        
                     73:        volatile BOOL Suspended;
                     74:        volatile BOOL SuspendPending;
                     75:        volatile BOOL StopPending;
                     76: 
                     77:        KEVENT QueueResumedEvent;
                     78: 
                     79: }  EncryptedIoQueue;
                     80: 
                     81: 
                     82: typedef struct
                     83: {
                     84:        EncryptedIoQueue *Queue;
                     85:        PIRP OriginalIrp;
                     86:        BOOL Write;
                     87:        ULONG OriginalLength;
                     88:        LARGE_INTEGER OriginalOffset;
1.1.1.3   root       89:        LONG OutstandingRequestCount;
1.1       root       90:        NTSTATUS Status;
                     91: } EncryptedIoQueueItem;
                     92: 
                     93: 
                     94: typedef struct
                     95: {
                     96:        EncryptedIoQueueItem *Item;
                     97: 
                     98:        BOOL CompleteOriginalIrp;
                     99:        LARGE_INTEGER Offset;
                    100:        ULONG Length;
                    101:        int64 EncryptedOffset;
                    102:        ULONG EncryptedLength;
                    103:        byte *Data;
                    104:        byte *OrigDataBufferFragment;
                    105: 
                    106:        LIST_ENTRY ListEntry;
                    107:        LIST_ENTRY CompletionListEntry;
                    108: } EncryptedIoRequest;
                    109: 
                    110: 
                    111: NTSTATUS EncryptedIoQueueAddIrp (EncryptedIoQueue *queue, PIRP irp);
                    112: BOOL EncryptedIoQueueIsRunning (EncryptedIoQueue *queue);
                    113: BOOL EncryptedIoQueueIsSuspended (EncryptedIoQueue *queue);
                    114: NTSTATUS EncryptedIoQueueResumeFromHold (EncryptedIoQueue *queue);
1.1.1.5 ! root      115: NTSTATUS EncryptedIoQueueStart (EncryptedIoQueue *queue);
1.1       root      116: NTSTATUS EncryptedIoQueueStop (EncryptedIoQueue *queue);
                    117: NTSTATUS EncryptedIoQueueHoldWhenIdle (EncryptedIoQueue *queue, int64 timeout);
                    118: 
                    119: 
                    120: #endif // TC_HEADER_DRIVER_ENCRYPTED_IO_QUEUE

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