[NTOSKRNL]

- Implement FsRtlRegisterFileSystemFilterCallbacks
- Fix returned ResultLength value in NtQuerySystemInformation
- Create \FileSystems\Filters folder in IopCreateRootDirectories, used by Windows fltmgr

svn path=/trunk/; revision=61874

reactos/ntoskrnl/ex/sysinfo.c

@@ -1956,51 +1956,51 @@ CallQS [] =
     SI_QX(SystemPerformanceInformation),
     SI_QX(SystemTimeOfDayInformation),
     SI_QX(SystemPathInformation), /* should be SI_XX */
-    SI_QX(SystemProcessInformation),
+    SI_QX(SystemProcessInformation),  // aka SystemProcessesAndThreadsInformation
-    SI_QX(SystemCallCountInformation),
+    SI_QX(SystemCallCountInformation), // aka SystemCallCounts
-    SI_QX(SystemDeviceInformation),
+    SI_QX(SystemDeviceInformation), // aka SystemConfigurationInformation
-    SI_QX(SystemProcessorPerformanceInformation),
+    SI_QX(SystemProcessorPerformanceInformation), // aka SystemProcessorTimes
-    SI_QS(SystemFlagsInformation),
+    SI_QS(SystemFlagsInformation), // aka SystemGlobalFlag
     SI_QX(SystemCallTimeInformation), /* should be SI_XX */
     SI_QX(SystemModuleInformation),
-    SI_QX(SystemLocksInformation),
+    SI_QX(SystemLocksInformation), // aka SystemLockInformation
     SI_QX(SystemStackTraceInformation), /* should be SI_XX */
     SI_QX(SystemPagedPoolInformation), /* should be SI_XX */
     SI_QX(SystemNonPagedPoolInformation), /* should be SI_XX */
     SI_QX(SystemHandleInformation),
     SI_QX(SystemObjectInformation),
-    SI_QX(SystemPageFileInformation),
+    SI_QX(SystemPageFileInformation), // aka SystemPagefileInformation
-    SI_QX(SystemVdmInstemulInformation),
+    SI_QX(SystemVdmInstemulInformation), // aka SystemInstructionEmulationCounts
     SI_QX(SystemVdmBopInformation), /* it should be SI_XX */
-    SI_QS(SystemFileCacheInformation),
+    SI_QS(SystemFileCacheInformation), // aka SystemCacheInformation
     SI_QX(SystemPoolTagInformation),
-    SI_QX(SystemInterruptInformation),
+    SI_QX(SystemInterruptInformation), // aka SystemProcessorStatistics
-    SI_QS(SystemDpcBehaviourInformation),
+    SI_QS(SystemDpcBehaviourInformation), // aka SystemDpcInformation
     SI_QX(SystemFullMemoryInformation), /* it should be SI_XX */
-    SI_XS(SystemLoadGdiDriverInformation),
+    SI_XS(SystemLoadGdiDriverInformation), // correct: SystemLoadImage
-    SI_XS(SystemUnloadGdiDriverInformation),
+    SI_XS(SystemUnloadGdiDriverInformation), // correct: SystemUnloadImage
-    SI_QS(SystemTimeAdjustmentInformation),
+    SI_QS(SystemTimeAdjustmentInformation), // aka SystemTimeAdjustment
     SI_QX(SystemSummaryMemoryInformation), /* it should be SI_XX */
     SI_QX(SystemNextEventIdInformation), /* it should be SI_XX */
-    SI_QX(SystemEventIdsInformation), /* it should be SI_XX */
+    SI_QX(SystemEventIdsInformation), /* it should be SI_XX */ // SystemPerformanceTraceInformation
     SI_QX(SystemCrashDumpInformation),
     SI_QX(SystemExceptionInformation),
     SI_QX(SystemCrashDumpStateInformation),
     SI_QX(SystemKernelDebuggerInformation),
     SI_QX(SystemContextSwitchInformation),
     SI_QS(SystemRegistryQuotaInformation),
-    SI_XS(SystemExtendServiceTableInformation),
+    SI_XS(SystemExtendServiceTableInformation), // correct: SystemLoadAndCallImage
     SI_XS(SystemPrioritySeperation),
     SI_QX(SystemPlugPlayBusInformation), /* it should be SI_XX */
     SI_QX(SystemDockInformation), /* it should be SI_XX */
-    SI_QX(SystemPowerInformation), /* it should be SI_XX */
+    SI_QX(SystemPowerInformation), /* it should be SI_XX */ // SystemPowerInformationNative? SystemInvalidInfoClass2
     SI_QX(SystemProcessorSpeedInformation), /* it should be SI_XX */
-    SI_QS(SystemCurrentTimeZoneInformation), /* it should be SI_QX */
+    SI_QS(SystemCurrentTimeZoneInformation), /* it should be SI_QX */ // aka SystemTimeZoneInformation
     SI_QX(SystemLookasideInformation),
     SI_XS(SystemSetTimeSlipEvent),
     SI_XS(SystemCreateSession),
     SI_XS(SystemDeleteSession),
-    SI_QX(SystemInvalidInfoClass4), /* it should be SI_XX */
+    SI_QX(SystemInvalidInfoClass4), /* it should be SI_XX */ // SystemSessionInformation?
     SI_QX(SystemRangeStartInformation),
     SI_QS(SystemVerifierInformation),
     SI_XS(SystemAddVerifier),
@@ -2021,7 +2021,7 @@ NtQuerySystemInformation(IN SYSTEM_INFORMATION_CLASS SystemInformationClass,
                          OUT PULONG UnsafeResultLength)
 {
     KPROCESSOR_MODE PreviousMode;
-    ULONG ResultLength;
+    ULONG ResultLength = 0;
     NTSTATUS FStatus = STATUS_NOT_IMPLEMENTED;
 
     PAGED_CODE();
@@ -2038,8 +2038,11 @@ NtQuerySystemInformation(IN SYSTEM_INFORMATION_CLASS SystemInformationClass,
                 ProbeForWriteUlong(UnsafeResultLength);
         }
 
+        if (UnsafeResultLength)
+            *UnsafeResultLength = 0;
+
         /*
-         * Check the request is valid.
+         * Check if the request is valid.
          */
         if (SystemInformationClass >= MAX_SYSTEM_INFO_CLASS)
         {

reactos/ntoskrnl/fsrtl/fastio.c

@@ -1942,9 +1942,35 @@ FsRtlReleaseFileForModWrite(IN PFILE_OBJECT FileObject,
  *--*/
 NTSTATUS
 NTAPI
-FsRtlRegisterFileSystemFilterCallbacks(IN PDRIVER_OBJECT FilterDriverObject,
+FsRtlRegisterFileSystemFilterCallbacks(
-                                       IN PFS_FILTER_CALLBACKS Callbacks)
+    PDRIVER_OBJECT FilterDriverObject,
+    PFS_FILTER_CALLBACKS Callbacks)
 {
-    UNIMPLEMENTED;
+    PFS_FILTER_CALLBACKS NewCallbacks;
-    return STATUS_NOT_IMPLEMENTED;
+    PEXTENDED_DRIVER_EXTENSION DriverExtension;
+    PAGED_CODE();
+
+    /* Verify parameters */
+    if ((FilterDriverObject == NULL) || (Callbacks == NULL))
+    {
+        return STATUS_INVALID_PARAMETER;
+    }
+
+    /* Allocate a buffer for a copy of the callbacks */
+    NewCallbacks = ExAllocatePoolWithTag(NonPagedPool,
+                                         Callbacks->SizeOfFsFilterCallbacks,
+                                         'gmSF');
+    if (NewCallbacks == NULL)
+    {
+        return STATUS_INSUFFICIENT_RESOURCES;
+    }
+
+    /* Copy the callbacks */
+    RtlCopyMemory(NewCallbacks, Callbacks, Callbacks->SizeOfFsFilterCallbacks);
+
+    /* Set the callbacks in the driver extension */
+    DriverExtension = (PEXTENDED_DRIVER_EXTENSION)FilterDriverObject->DriverExtension;
+    DriverExtension->FsFilterCallbacks = NewCallbacks;
+
+    return STATUS_SUCCESS;
 }

reactos/ntoskrnl/io/iomgr/iomgr.c

@@ -332,6 +332,7 @@ IopCreateRootDirectories()
     OBJECT_ATTRIBUTES ObjectAttributes;
     UNICODE_STRING DirName;
     HANDLE Handle;
+    NTSTATUS Status;
 
     /* Create the '\Driver' object directory */
     RtlInitUnicodeString(&DirName, L"\\Driver");
@@ -340,9 +341,14 @@ IopCreateRootDirectories()
                                OBJ_PERMANENT,
                                NULL,
                                NULL);
-    if (!NT_SUCCESS(NtCreateDirectoryObject(&Handle,
+    Status = NtCreateDirectoryObject(&Handle,
                                      DIRECTORY_ALL_ACCESS,
-                                            &ObjectAttributes))) return FALSE;
+                                     &ObjectAttributes);
+    if (!NT_SUCCESS(Status))
+    {
+        DPRINT1("Failed to create \\Driver directory: 0x%lx\n", Status);
+        return FALSE;
+    }
     NtClose(Handle);
 
     /* Create the '\FileSystem' object directory */
@@ -352,9 +358,31 @@ IopCreateRootDirectories()
                                OBJ_PERMANENT,
                                NULL,
                                NULL);
-    if (!NT_SUCCESS(NtCreateDirectoryObject(&Handle,
+    Status = NtCreateDirectoryObject(&Handle,
                                      DIRECTORY_ALL_ACCESS,
-                                            &ObjectAttributes))) return FALSE;
+                                     &ObjectAttributes);
+    if (!NT_SUCCESS(Status))
+    {
+        DPRINT1("Failed to create \\FileSystem directory: 0x%lx\n", Status);
+        return FALSE;
+    }
+    NtClose(Handle);
+
+    /* Create the '\FileSystem' object directory */
+    RtlInitUnicodeString(&DirName, L"\\FileSystem\\Filters");
+    InitializeObjectAttributes(&ObjectAttributes,
+                               &DirName,
+                               OBJ_PERMANENT,
+                               NULL,
+                               NULL);
+    Status = NtCreateDirectoryObject(&Handle,
+                                     DIRECTORY_ALL_ACCESS,
+                                     &ObjectAttributes);
+    if (!NT_SUCCESS(Status))
+    {
+        DPRINT1("Failed to create \\FileSystem\\Filters directory: 0x%lx\n", Status);
+        return FALSE;
+    }
     NtClose(Handle);
 
     /* Return success */