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Annotation of truecrypt/driver/ntfiledv.c, revision 1.1.1.3

1.1.1.3 ! root        1: /* The source code contained in this file has been derived from the source code
        !             2:    of Encryption for the Masses 2.02a by Paul Le Roux. Modifications and
        !             3:    additions to that source code contained in this file are Copyright (c) 2004
        !             4:    TrueCrypt Team and Copyright (c) 2004 TrueCrypt Foundation. Unmodified
        !             5:    parts are Copyright (c) 1998-99 Paul Le Roux. This is a TrueCrypt Foundation
        !             6:    release. Please see the file license.txt for full license details. */
1.1       root        7: 
                      8: #include "TCdefs.h"
                      9: #include "crypto.h"
                     10: #include "fat.h"
                     11: #include "volumes.h"
                     12: 
                     13: #include "apidrvr.h"
                     14: #include "ntdriver.h"
                     15: #include "ntvol.h"
                     16: #include "ntfiledv.h"
                     17: 
                     18: #pragma warning( disable : 4127 )
                     19: 
                     20: TCSendIRP_FileDevice (PDEVICE_OBJECT DeviceObject,
                     21:                       PEXTENSION Extension,
                     22:                       PVOID pUserBuffer,
                     23:                       ULONG uFlags,
                     24:                       UCHAR uMajorFunction,
                     25:                       PIRP Irp)
                     26: {
                     27:        PIO_STACK_LOCATION irpOldSp;
                     28:        NTSTATUS ntStatus;
                     29:        PIRP NewIrp;
                     30: 
                     31: //     Dump ("Sending IRP...\n");
                     32: 
                     33:        NewIrp = IoAllocateIrp ((CCHAR) (Extension->pFsdDevice->StackSize + 1), FALSE);
                     34: 
                     35:        irpOldSp = IoGetCurrentIrpStackLocation (Irp);
                     36: 
                     37:        if (NewIrp != NULL)
                     38:        {
                     39:                PIO_STACK_LOCATION irpSp, irpNextSp;
                     40: 
                     41:                NewIrp->UserEvent = NULL;
                     42:                NewIrp->UserIosb = &Irp->IoStatus;
                     43: 
                     44:                /* Doc's say to copy the Tail.Overlay.Thread from the
                     45:                   original Irp but if I do this the user is not prompted on
                     46:                   media removed and other user conditions! */
                     47:                NewIrp->Tail.Overlay.Thread = PsGetCurrentThread ();
                     48:                NewIrp->Tail.Overlay.OriginalFileObject = Extension->pfoDeviceFile;
                     49:                NewIrp->RequestorMode = KernelMode;
                     50: 
                     51:                NewIrp->Flags = uFlags;
                     52: 
                     53:                NewIrp->AssociatedIrp.SystemBuffer = NULL;
                     54:                NewIrp->MdlAddress = NULL;
                     55:                NewIrp->UserBuffer = pUserBuffer;
                     56: 
                     57:                IoSetNextIrpStackLocation (NewIrp);
                     58: 
                     59:                irpSp = IoGetCurrentIrpStackLocation (NewIrp);
                     60:                irpNextSp = IoGetNextIrpStackLocation (NewIrp);
                     61: 
                     62:                irpSp->DeviceObject = DeviceObject;
                     63:                irpSp->FileObject = Extension->pfoDeviceFile;
                     64: 
                     65:                irpNextSp->MajorFunction = irpSp->MajorFunction = uMajorFunction;
                     66:                irpNextSp->MinorFunction = irpSp->MinorFunction = irpSp->MinorFunction;
                     67:                irpNextSp->DeviceObject = Extension->pFsdDevice;
                     68:                irpNextSp->FileObject = Extension->pfoDeviceFile;
                     69:                /* Copy our flags down one level, this is to get the proper
                     70:                   removable-media handling */
                     71:                irpNextSp->Flags = irpSp->Flags = irpOldSp->Flags;
                     72:                /* Copy over io parameters, this is a union, so it handles
                     73:                   deviceiocontrol & read/write */
                     74:                irpNextSp->Parameters.Read.Length = irpSp->Parameters.Read.Length = irpOldSp->Parameters.Read.Length;
                     75:                irpNextSp->Parameters.Read.ByteOffset = irpSp->Parameters.Read.ByteOffset = irpOldSp->Parameters.Read.ByteOffset;
                     76:                irpNextSp->Parameters.Read.Key = irpSp->Parameters.Read.Key = irpOldSp->Parameters.Read.Key;
                     77:        }
                     78:        else
                     79:        {
                     80:                TCfree (pUserBuffer);   /* Free the temp buffer we allocated
                     81:                                           for the IRP */
                     82: 
                     83:                /* Complete the processing of the original Irp */
                     84:                return COMPLETE_IRP (DeviceObject, Irp, STATUS_INSUFFICIENT_RESOURCES, 0);
                     85:        }
                     86: 
                     87:        IoSetCompletionRoutine (NewIrp, TCCompletion, Irp, TRUE, TRUE, TRUE);
                     88: 
                     89:        ntStatus = IoCallDriver (Extension->pFsdDevice, NewIrp);
                     90:        //if (ntStatus == STATUS_PENDING)
                     91:        //{
                     92:        //      Dump ("Pending returned!\n");
                     93:        //}
                     94: 
                     95: //     Dump ("IRP Sent!\n");
                     96:        return ntStatus;
                     97: }

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