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[FLTMGR]
- Properly handle requests that were sent directly to the fltmgr instead of sending them down the stack - Add a separate callback for IRP_MJ_DEVICE_CONTROL and forward them on to an internal handler - We can now open a handle to the fltmgr and send IOCTLs down to it. svn path=/trunk/; revision=72593
This commit is contained in:
Ged Murphy
parent
4e466b10df
commit
72ae4c113e
1 changed files with 94 additions and 22 deletions
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@ -1,7 +1,7 @@
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/*
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* PROJECT: Filesystem Filter Manager
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* LICENSE: GPL - See COPYING in the top level directory
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* FILE: drivers/fs_minifilter/fltmgr/interface.c
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* FILE: drivers/filters/fltmgr/interface.c
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* PURPOSE: Implements the driver interface
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* PROGRAMMERS: Ged Murphy (gedmurphy@reactos.org)
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*/
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@ -9,6 +9,7 @@
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/* INCLUDES ******************************************************************/
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#include "fltmgr.h"
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#include "fltmgrint.h"
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//#define NDEBUG
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#include <debug.h>
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@ -99,6 +100,13 @@ FltpFsControl(
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_Inout_ PIRP Irp
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);
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NTSTATUS
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NTAPI
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FltpDeviceControl(
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_In_ PDEVICE_OBJECT DeviceObject,
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_Inout_ PIRP Irp
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);
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BOOLEAN
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NTAPI
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FltpFastIoCheckIfPossible(
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@ -344,6 +352,7 @@ FltpFastIoQueryOpen(
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#pragma alloc_text(PAGE, FltpFsNotification)
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#pragma alloc_text(PAGE, FltpCreate)
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#pragma alloc_text(PAGE, FltpFsControl)
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#pragma alloc_text(PAGE, FltpDeviceControl)
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#pragma alloc_text(PAGE, FltpFastIoRead)
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#pragma alloc_text(PAGE, FltpFastIoWrite)
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#pragma alloc_text(PAGE, FltpFastIoQueryBasicInfo)
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@ -366,26 +375,11 @@ FltpFastIoQueryOpen(
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#pragma alloc_text(PAGE, FltpFastIoQueryOpen)
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#endif
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#define MAX_DEVNAME_LENGTH 64
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DRIVER_DATA DriverData;
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typedef struct _FLTMGR_DEVICE_EXTENSION
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{
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/* The file system we're attached to */
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PDEVICE_OBJECT AttachedToDeviceObject;
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/* The storage stack(disk) accociated with the file system device object we're attached to */
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PDEVICE_OBJECT StorageStackDeviceObject;
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/* Either physical drive for volume device objects otherwise
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* it's the name of the control device we're attached to */
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UNICODE_STRING DeviceName;
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WCHAR DeviceNameBuffer[MAX_DEVNAME_LENGTH];
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} FLTMGR_DEVICE_EXTENSION, *PFLTMGR_DEVICE_EXTENSION;
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typedef struct _DETACH_DEVICE_WORK_ITEM
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{
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WORK_QUEUE_ITEM WorkItem;
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@ -427,18 +421,38 @@ FltpDispatch(_In_ PDEVICE_OBJECT DeviceObject,
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{
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PFLTMGR_DEVICE_EXTENSION DeviceExtension;
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PIO_STACK_LOCATION StackPtr;
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NTSTATUS Status;
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DeviceExtension = DeviceObject->DeviceExtension;
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__debugbreak();
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/* Check if this is a request for us */
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if (DeviceObject == DriverData.DeviceObject)
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{
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FLT_ASSERT(DeviceObject->DriverObject == DriverData.DriverObject);
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FLT_ASSERT(DeviceExtension == NULL);
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/* Hand it off to our internal handler */
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Status = FltpDispatchHandler(DeviceObject, Irp);
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if (Status != STATUS_REPARSE)
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{
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Irp->IoStatus.Status = Status;
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Irp->IoStatus.Information = 0;
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IoCompleteRequest(Irp, 0);
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}
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return Status;
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}
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FLT_ASSERT(DeviceExtension &&
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DeviceExtension->AttachedToDeviceObject);
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StackPtr = IoGetCurrentIrpStackLocation(Irp);
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if (StackPtr->MajorFunction == IRP_MJ_SHUTDOWN)
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{
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//FltpProcessShutdownRequest(DeviceObject);
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// handle shutdown request
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}
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DPRINT1("Received %X from %wZ\n", StackPtr->MajorFunction, &DeviceExtension->DeviceName);
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/* Just pass the IRP down the stack */
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IoSkipCurrentIrpStackLocation(Irp);
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return IoCallDriver(DeviceExtension->AttachedToDeviceObject, Irp);
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@ -454,10 +468,25 @@ FltpCreate(_In_ PDEVICE_OBJECT DeviceObject,
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PAGED_CODE();
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DeviceExtension = DeviceObject->DeviceExtension;
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__debugbreak();
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/* Check if this is a request for us */
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if (DeviceObject == DriverData.DeviceObject)
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{
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FLT_ASSERT(DeviceObject->DriverObject == DriverData.DriverObject);
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FLT_ASSERT(DeviceExtension == NULL);
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/* Someone wants a handle to the fltmgr, allow it */
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Irp->IoStatus.Status = STATUS_SUCCESS;
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Irp->IoStatus.Information = 0;
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IofCompleteRequest(Irp, 0);
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return STATUS_SUCCESS;
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}
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FLT_ASSERT(DeviceExtension &&
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DeviceExtension->AttachedToDeviceObject);
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DPRINT1("Received create from %wZ (%lu)\n", &DeviceExtension->DeviceName, PsGetCurrentProcessId());
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/* Just pass the IRP down the stack */
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IoSkipCurrentIrpStackLocation(Irp);
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return IoCallDriver(DeviceExtension->AttachedToDeviceObject, Irp);
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@ -472,10 +501,53 @@ FltpFsControl(_In_ PDEVICE_OBJECT DeviceObject,
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PAGED_CODE();
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/* Check if this is a request for us */
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if (DeviceObject == DriverData.DeviceObject)
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{
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/* We don't handle this request */
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Irp->IoStatus.Information = 0;
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Irp->IoStatus.Status = STATUS_INVALID_DEVICE_REQUEST;
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IofCompleteRequest(Irp, 0);
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return STATUS_INVALID_DEVICE_REQUEST;
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}
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DeviceExtension = DeviceObject->DeviceExtension;
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__debugbreak();
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FLT_ASSERT(DeviceExtension &&
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DeviceExtension->AttachedToDeviceObject);
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/* Just pass the IRP down the stack */
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IoSkipCurrentIrpStackLocation(Irp);
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return IoCallDriver(DeviceExtension->AttachedToDeviceObject, Irp);
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}
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NTSTATUS
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NTAPI
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FltpDeviceControl(_In_ PDEVICE_OBJECT DeviceObject,
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_Inout_ PIRP Irp)
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{
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PFLTMGR_DEVICE_EXTENSION DeviceExtension;
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NTSTATUS Status;
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/* Check if the request was meant for us */
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if (DeviceObject == DriverData.DeviceObject)
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{
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Status = FltpDeviceControlHandler(DeviceObject, Irp);
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if (Status != STATUS_REPARSE)
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{
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Irp->IoStatus.Status = Status;
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Irp->IoStatus.Information = 0;
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IoCompleteRequest(Irp, 0);
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}
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return Status;
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}
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DeviceExtension = DeviceObject->DeviceExtension;
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FLT_ASSERT(DeviceExtension &&
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DeviceExtension->AttachedToDeviceObject);
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/* Just pass the IRP down the stack */
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IoSkipCurrentIrpStackLocation(Irp);
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return IoCallDriver(DeviceExtension->AttachedToDeviceObject, Irp);
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@ -1890,7 +1962,6 @@ FltpDetachFromFileSystemDevice(_In_ PDEVICE_OBJECT DeviceObject)
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LONG_PTR Count;
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PAGED_CODE();
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__debugbreak();
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/* Get the top device in the chain and increment the ref count on it */
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AttachedDevice = IoGetAttachedDeviceReference(DeviceObject);
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@ -2099,6 +2170,7 @@ SetupDispatchAndCallbacksTables(_In_ PDRIVER_OBJECT DriverObject)
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DriverObject->MajorFunction[IRP_MJ_CREATE_NAMED_PIPE] = FltpCreate;
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DriverObject->MajorFunction[IRP_MJ_CREATE_MAILSLOT] = FltpCreate;
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DriverObject->MajorFunction[IRP_MJ_FILE_SYSTEM_CONTROL] = FltpFsControl;
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DriverObject->MajorFunction[IRP_MJ_DEVICE_CONTROL] = FltpDeviceControl;
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/* The FastIo diapatch table is stored in the pool along with a tag */
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FastIoDispatch = ExAllocatePoolWithTag(NonPagedPool, sizeof(FAST_IO_DISPATCH), FM_TAG_DISPATCH_TABLE);
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