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
ClassInitializeDispatchTables(PCLASS_DRIVER_EXTENSION DriverExtension)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 */
ClassGlobalDispatch(IN PDEVICE_OBJECT DeviceObject,IN PIRP Irp)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 */
ClassDispatchUnimplemented(IN PDEVICE_OBJECT DeviceObject,IN PIRP Irp)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