huwcampbell.com
Reactos
1#include "partmgr.h"
2
3NTSTATUS
4NTAPI
5ForwardIrpAndForget(
6 _In_ PDEVICE_OBJECT DeviceObject,
7 _In_ PIRP Irp)
8{
9 // this part of a structure is identical in both FDO and PDO
10 PDEVICE_OBJECT LowerDevice = ((PFDO_EXTENSION)DeviceObject->DeviceExtension)->LowerDevice;
11
12 ASSERT(LowerDevice);
13
14 IoSkipCurrentIrpStackLocation(Irp);
15 return IoCallDriver(LowerDevice, Irp);
16}
17
18NTSTATUS
19IssueSyncIoControlRequest(
20 _In_ UINT32 IoControlCode,
21 _In_ PDEVICE_OBJECT DeviceObject,
22 _In_ PVOID InputBuffer,
23 _In_ ULONG InputBufferLength,
24 _In_ PVOID OutputBuffer,
25 _In_ ULONG OutputBufferLength,
26 _In_ BOOLEAN InternalDeviceIoControl)
27{
28 PIRP Irp;
29 IO_STATUS_BLOCK IoStatusBlock;
30 PKEVENT Event;
31 NTSTATUS Status;
32 PAGED_CODE();
33
34 /* Allocate a non-paged event */
35 Event = ExAllocatePoolWithTag(NonPagedPool, sizeof(*Event), TAG_PARTMGR);
36 if (!Event)
37 {
38 return STATUS_INSUFFICIENT_RESOURCES;
39 }
40
41 /* Initialize it */
42 KeInitializeEvent(Event, NotificationEvent, FALSE);
43
44 /* Build the IRP */
45 Irp = IoBuildDeviceIoControlRequest(IoControlCode,
46 DeviceObject,
47 InputBuffer,
48 InputBufferLength,
49 OutputBuffer,
50 OutputBufferLength,
51 InternalDeviceIoControl,
52 Event,
53 &IoStatusBlock);
54 if (!Irp)
55 {
56 /* Fail, free the event */
57 ExFreePoolWithTag(Event, TAG_PARTMGR);
58 return STATUS_INSUFFICIENT_RESOURCES;
59 }
60
61 /* Call the driver and check if it's pending */
62 Status = IoCallDriver(DeviceObject, Irp);
63 if (Status == STATUS_PENDING)
64 {
65 /* Wait on the driver */
66 KeWaitForSingleObject(Event, Executive, KernelMode, FALSE, NULL);
67 Status = IoStatusBlock.Status;
68 }
69
70 /* Free the event and return the Status */
71 ExFreePoolWithTag(Event, TAG_PARTMGR);
72 return Status;
73}