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[FLTMGR] Delete unused file

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Ged Murphy 2018-10-29 11:17:21 +00:00 committed by Pierre Schweitzer
parent f21a2a6cfb
commit 4d603e689e
1 changed files with 0 additions and 252 deletions
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252
drivers/filters/fltmgr/Registration.c
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@ -1,252 +0,0 @@
/*
* PROJECT: Filesystem Filter Manager
* LICENSE: GPL - See COPYING in the top level directory
* FILE: drivers/fs_minifilter/fltmgr/Registration.c
* PURPOSE: Handles registration of mini filters
* PROGRAMMERS: Ged Murphy (gedmurphy@reactos.org)
*/
/* INCLUDES ******************************************************************/
#include "fltmgr.h"
#define NDEBUG
#include <debug.h>
/* DATA *********************************************************************/
NTSTATUS
FltpStartingToDrainObject(
_Inout_ PFLT_OBJECT Object
);
/* EXPORTED FUNCTIONS ******************************************************/
NTSTATUS
NTAPI
FltRegisterFilter(_In_ PDRIVER_OBJECT DriverObject,
_In_ const FLT_REGISTRATION *Registration,
_Out_ PFLT_FILTER *RetFilter)
{
PFLT_OPERATION_REGISTRATION Callbacks;
PFLT_FILTER Filter;
ULONG CallbackBufferSize;
ULONG FilterBufferSize;
ULONG Count = 0;
PCHAR Ptr;
NTSTATUS Status;
Status = 0; //remove me
/* Make sure we're targeting the correct major revision */
if ((Registration->Version & 0xFF00) != FLT_MAJOR_VERSION)
{
return STATUS_INVALID_PARAMETER;
}
/* Make sure our namespace callbacks are valid */
if ((!Registration->GenerateFileNameCallback && Registration->NormalizeNameComponentCallback) ||
(!Registration->NormalizeNameComponentCallback && Registration->NormalizeContextCleanupCallback))
{
return STATUS_INVALID_PARAMETER;
}
/* Count the number of operations that were requested */
Callbacks = (PFLT_OPERATION_REGISTRATION)Registration->OperationRegistration;
while (Callbacks)
{
Count++;
/* Bail when we find the last one */
if (Callbacks->MajorFunction == IRP_MJ_OPERATION_END)
break;
/* Move to the next item */
Callbacks++;
}
/* Calculate the buffer sizes */
CallbackBufferSize = Count * sizeof(FLT_OPERATION_REGISTRATION);
FilterBufferSize = sizeof(FLT_FILTER) + CallbackBufferSize +
DriverObject->DriverExtension->ServiceKeyName.Length;
/* Allocate a buffer to hold our filter data */
Filter = ExAllocatePoolWithTag(NonPagedPool,
FilterBufferSize,
FM_TAG_FILTER);
if (Filter == NULL) return STATUS_INSUFFICIENT_RESOURCES;
RtlZeroMemory(Filter, FilterBufferSize);
/* Find the end of the fixed struct */
Ptr = (PCHAR)(Filter + 1);
/* Store a copy of the driver object of this filter */
Filter->DriverObject = DriverObject;
/* Initialize the base object data */
Filter->Base.Flags = FLT_OBFL_TYPE_FILTER;
Filter->Base.PointerCount = 1;
FltpExInitializeRundownProtection(&Filter->Base.RundownRef);
FltObjectReference(&Filter->Base);
/* Set the callback addresses */
Filter->FilterUnload = Registration->FilterUnloadCallback;
Filter->InstanceSetup = Registration->InstanceSetupCallback;
Filter->InstanceQueryTeardown = Registration->InstanceQueryTeardownCallback;
Filter->InstanceTeardownStart = Registration->InstanceTeardownStartCallback;
Filter->InstanceTeardownComplete = Registration->InstanceTeardownCompleteCallback;
Filter->GenerateFileName = Registration->GenerateFileNameCallback;
Filter->NormalizeNameComponent = Registration->NormalizeNameComponentCallback;
Filter->NormalizeContextCleanup = Registration->NormalizeContextCleanupCallback;
/* Initialize the instance list */
ExInitializeResourceLite(&Filter->InstanceList.rLock);
InitializeListHead(&Filter->InstanceList.rList);
Filter->InstanceList.rCount = 0;
ExInitializeFastMutex(&Filter->ActiveOpens.mLock);
InitializeListHead(&Filter->ActiveOpens.mList);
Filter->ActiveOpens.mCount = 0;
/* Initialize the usermode port list */
ExInitializeFastMutex(&Filter->PortList.mLock);
InitializeListHead(&Filter->PortList.mList);
Filter->PortList.mCount = 0;
/* Check if the caller requested any context data */
if (Registration->ContextRegistration)
{
// register the context information
}
if (Registration->OperationRegistration)
{
/* The callback data comes after the fixed struct */
Filter->Operations = (PFLT_OPERATION_REGISTRATION)Ptr;
Ptr += (Count * sizeof(FLT_OPERATION_REGISTRATION));
/* Tag the operation data onto the end of the filter data */
RtlCopyMemory(Filter->Operations, Registration->OperationRegistration, CallbackBufferSize);
/* walk through the requested callbacks */
for (Callbacks = Filter->Operations;
Callbacks->MajorFunction != IRP_MJ_OPERATION_END;
Callbacks++)
{
// http://fsfilters.blogspot.co.uk/2011/03/how-file-system-filters-attach-to_17.html
/* Check if this is an attach to a volume */
if (Callbacks->MajorFunction == IRP_MJ_VOLUME_MOUNT)
{
Filter->PreVolumeMount = Callbacks->PreOperation;
Filter->PostVolumeMount = Callbacks->PostOperation;
}
else if (Callbacks->MajorFunction == IRP_MJ_SHUTDOWN)
{
Callbacks->PostOperation = NULL;
}
}
}
/* Add the filter name buffer onto the end of the data and fill in the string */
Filter->Name.Length = 0;
Filter->Name.MaximumLength = DriverObject->DriverExtension->ServiceKeyName.Length;
Filter->Name.Buffer = (PWCH)Ptr;
RtlCopyUnicodeString(&Filter->Name, &DriverObject->DriverExtension->ServiceKeyName);
//
// - Get the altitude string
// - Slot the filter into the correct altitude location
// - More stuff??
//
//Quit:
if (!NT_SUCCESS(Status))
{
// Add cleanup for context resources
ExDeleteResourceLite(&Filter->InstanceList.rLock);
ExFreePoolWithTag(Filter, FM_TAG_FILTER);
}
return Status;
}
VOID
FLTAPI
FltUnregisterFilter(_In_ PFLT_FILTER Filter)
{
PFLT_INSTANCE Instance;
PLIST_ENTRY CurrentEntry;
NTSTATUS Status;
/* Set the draining flag */
Status = FltpStartingToDrainObject(&Filter->Base);
if (!NT_SUCCESS(Status))
{
/* Someone already unregistered us, just remove our ref and bail */
FltObjectDereference(&Filter->Base);
return;
}
/* Lock the instance list */
KeEnterCriticalRegion();
ExAcquireResourceSharedLite(&Filter->InstanceList.rLock, TRUE);
/* Set the first entry in the list */
CurrentEntry = Filter->InstanceList.rList.Flink;
/* Free all instances referenced by the filter */
while (CurrentEntry != &Filter->InstanceList.rList)
{
/* Get the record pointer */
Instance = CONTAINING_RECORD(CurrentEntry, FLT_INSTANCE, FilterLink);
// FIXME: implement
(void)Instance;
/* Reset the pointer and move to next entry */
Instance = NULL;
CurrentEntry = CurrentEntry->Flink;
}
/* We're done with instances now */
ExReleaseResourceLite(&Filter->InstanceList.rLock);
KeLeaveCriticalRegion();
/* Remove the reference from the base object */
FltObjectDereference(&Filter->Base);
/* Wait until we're sure nothing is using the filter */
FltpObjectRundownWait(&Filter->Base.RundownRef);
/* Delete the instance list lock */
ExDeleteResourceLite(&Filter->InstanceList.rLock);
/* We're finished cleaning up now */
FltpExRundownCompleted(&Filter->Base.RundownRef);
/* Hand the memory back */
ExFreePoolWithTag(Filter, FM_TAG_FILTER);
}
/* INTERNAL FUNCTIONS ******************************************************/
NTSTATUS
FltpStartingToDrainObject(_Inout_ PFLT_OBJECT Object)
{
/*
* Set the draining flag for the filter. This let's us force
* a post op callback for minifilters currently awaiting one.
*/
if (InterlockedOr((PLONG)&Object->Flags, FLT_OBFL_DRAINING) & 1)
{
/* We've been called once, we're already being deleted */
return STATUS_FLT_DELETING_OBJECT;
}
return STATUS_SUCCESS;
}