1 /*++
2 
3 Copyright (C) Microsoft Corporation, 1991 - 2005
4 
5 Module Name:
6 
7     dispatch.c
8 
9 Abstract:
10 
11     Code to support multiple dispatch tables.
12 
13 Environment:
14 
15     kernel mode only
16 
17 Notes:
18 
19 
20 Revision History:
21 
22 --*/
23 
24 #include "classp.h"
25 
26 #ifdef ALLOC_PRAGMA
27 #pragma alloc_text(PAGE, ClassInitializeDispatchTables)
28 #endif
29 
30 DRIVER_DISPATCH ClassDispatchUnimplemented;
31 
32 //
33 // Routines start
34 //
35 
36 
37 VOID
38 ClassInitializeDispatchTables(
39     PCLASS_DRIVER_EXTENSION DriverExtension
40     )
41 {
42     ULONG idx;
43 
44     PAGED_CODE();
45 
46     //
47     // Initialize the standard device dispatch table
48     //
49 
50     for (idx = 0; idx <= IRP_MJ_MAXIMUM_FUNCTION; idx++) {
51         DriverExtension->DeviceMajorFunctionTable[idx] = ClassDispatchUnimplemented;
52     }
53 
54     DriverExtension->DeviceMajorFunctionTable[IRP_MJ_CREATE]         = ClassCreateClose;
55     DriverExtension->DeviceMajorFunctionTable[IRP_MJ_CLOSE]          = ClassCreateClose;
56     DriverExtension->DeviceMajorFunctionTable[IRP_MJ_READ]           = ClassReadWrite;
57     DriverExtension->DeviceMajorFunctionTable[IRP_MJ_WRITE]          = ClassReadWrite;
58     DriverExtension->DeviceMajorFunctionTable[IRP_MJ_DEVICE_CONTROL] = ClassDeviceControlDispatch;
59     DriverExtension->DeviceMajorFunctionTable[IRP_MJ_SCSI]           = ClassInternalIoControl;
60     DriverExtension->DeviceMajorFunctionTable[IRP_MJ_SHUTDOWN]       = ClassShutdownFlush;
61     DriverExtension->DeviceMajorFunctionTable[IRP_MJ_FLUSH_BUFFERS]  = ClassShutdownFlush;
62     DriverExtension->DeviceMajorFunctionTable[IRP_MJ_PNP]            = ClassDispatchPnp;
63     DriverExtension->DeviceMajorFunctionTable[IRP_MJ_POWER]          = ClassDispatchPower;
64     DriverExtension->DeviceMajorFunctionTable[IRP_MJ_SYSTEM_CONTROL] = ClassSystemControl;
65 
66 
67     return;
68 }
69 
70 
71 NTSTATUS
72 NTAPI /* ReactOS Change: GCC Does not support STDCALL by default */
73 ClassGlobalDispatch(
74     IN PDEVICE_OBJECT DeviceObject,
75     IN PIRP Irp
76     )
77 
78 {
79     PCOMMON_DEVICE_EXTENSION commonExtension = DeviceObject->DeviceExtension;
80     PIO_STACK_LOCATION irpStack = IoGetCurrentIrpStackLocation(Irp);
81     // Code Analysis cannot analyze the code paths specific to clients.
82     _Analysis_assume_(FALSE);
83     return (commonExtension->DispatchTable[irpStack->MajorFunction])(DeviceObject, Irp);
84 
85 }
86 
87 NTSTATUS
88 NTAPI /* ReactOS Change: GCC Does not support STDCALL by default */
89 ClassDispatchUnimplemented(
90     IN PDEVICE_OBJECT DeviceObject,
91     IN PIRP Irp
92     )
93 /*++
94 
95 Routine Description:
96 
97     This function is the default dispatch routine.  Its
98     responsibility is simply to set the status in the packet to indicate
99     that the operation requested is invalid for this device type, and then
100     complete the packet.
101 
102 Arguments:
103 
104     DeviceObject - Specifies the device object for which this request is
105         bound.  Ignored by this routine.
106 
107     Irp - Specifies the address of the I/O Request Packet (IRP) for this
108         request.
109 
110 Return Value:
111 
112     The final status is always STATUS_INVALID_DEVICE_REQUEST.
113 
114 
115 --*/
116 
117 {
118     UNREFERENCED_PARAMETER( DeviceObject );
119 
120     //
121     // Simply store the appropriate status, complete the request, and return
122     // the same status stored in the packet.
123     //
124 
125     if ((IoGetCurrentIrpStackLocation(Irp))->MajorFunction == IRP_MJ_POWER) {
126         PoStartNextPowerIrp(Irp);
127     }
128     Irp->IoStatus.Status = STATUS_INVALID_DEVICE_REQUEST;
129     IoCompleteRequest( Irp, IO_NO_INCREMENT );
130     return STATUS_INVALID_DEVICE_REQUEST;
131 }
132 
133 
134