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Annotation of truecrypt/driver/ntfiledv.c, revision 1.1.1.2

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

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