modules/rostests/kmtests/ntos_cc/CcPinRead_drv.c

   1 /*
   2  * PROJECT:         ReactOS kernel-mode tests
   3  * LICENSE:         LGPLv2.1+ - See COPYING.LIB in the top level directory
   4  * PURPOSE:         Test driver for CcPinRead function
   5  * PROGRAMMER:      Pierre Schweitzer <pierre@reactos.org>
   6  */
   7
   8 #include <kmt_test.h>
   9
  10 #define NDEBUG
  11 #include <debug.h>
  12
  13 #define IOCTL_START_TEST  1
  14 #define IOCTL_FINISH_TEST 2
  15
  16 typedef struct _TEST_FCB
  17 {
  18     FSRTL_ADVANCED_FCB_HEADER Header;
  19     SECTION_OBJECT_POINTERS SectionObjectPointers;
  20     FAST_MUTEX HeaderMutex;
  21 } TEST_FCB, *PTEST_FCB;
  22
  23 typedef struct _TEST_CONTEXT
  24 {
  25     PVOID Bcb;
  26     PVOID Buffer;
  27     ULONG Length;
  28 } TEST_CONTEXT, *PTEST_CONTEXT;
  29
  30 static ULONG TestTestId = -1;
  31 static PFILE_OBJECT TestFileObject;
  32 static PDEVICE_OBJECT TestDeviceObject;
  33 static KMT_IRP_HANDLER TestIrpHandler;
  34 static KMT_MESSAGE_HANDLER TestMessageHandler;
  35
  36 NTSTATUS
  37 TestEntry(
  38     _In_ PDRIVER_OBJECT DriverObject,
  39     _In_ PCUNICODE_STRING RegistryPath,
  40     _Out_ PCWSTR *DeviceName,
  41     _Inout_ INT *Flags)
  42 {
  43     NTSTATUS Status = STATUS_SUCCESS;
  44
  45     PAGED_CODE();
  46
  47     UNREFERENCED_PARAMETER(RegistryPath);
  48
  49     *DeviceName = L"CcPinRead";
  50     *Flags = TESTENTRY_NO_EXCLUSIVE_DEVICE |
  51              TESTENTRY_BUFFERED_IO_DEVICE |
  52              TESTENTRY_NO_READONLY_DEVICE;
  53
  54     KmtRegisterIrpHandler(IRP_MJ_READ, NULL, TestIrpHandler);
  55     KmtRegisterMessageHandler(0, NULL, TestMessageHandler);
  56
  57
  58     return Status;
  59 }
  60
  61 VOID
  62 TestUnload(
  63     _In_ PDRIVER_OBJECT DriverObject)
  64 {
  65     PAGED_CODE();
  66 }
  67
  68 BOOLEAN
  69 NTAPI
  70 AcquireForLazyWrite(
  71     _In_ PVOID Context,
  72     _In_ BOOLEAN Wait)
  73 {
  74     return TRUE;
  75 }
  76
  77 VOID
  78 NTAPI
  79 ReleaseFromLazyWrite(
  80     _In_ PVOID Context)
  81 {
  82     return;
  83 }
  84
  85 BOOLEAN
  86 NTAPI
  87 AcquireForReadAhead(
  88     _In_ PVOID Context,
  89     _In_ BOOLEAN Wait)
  90 {
  91     return TRUE;
  92 }
  93
  94 VOID
  95 NTAPI
  96 ReleaseFromReadAhead(
  97     _In_ PVOID Context)
  98 {
  99     return;
 100 }
 101
 102 static CACHE_MANAGER_CALLBACKS Callbacks = {
 103     AcquireForLazyWrite,
 104     ReleaseFromLazyWrite,
 105     AcquireForReadAhead,
 106     ReleaseFromReadAhead,
 107 };
 108
 109 static CC_FILE_SIZES FileSizes = {
 110     RTL_CONSTANT_LARGE_INTEGER((LONGLONG)0x4000), // .AllocationSize
 111     RTL_CONSTANT_LARGE_INTEGER((LONGLONG)0x4000), // .FileSize
 112     RTL_CONSTANT_LARGE_INTEGER((LONGLONG)0x4000)  // .ValidDataLength
 113 };
 114
 115 static
 116 PVOID
 117 MapAndLockUserBuffer(
 118     _In_ _Out_ PIRP Irp,
 119     _In_ ULONG BufferLength)
 120 {
 121     PMDL Mdl;
 122
 123     if (Irp->MdlAddress == NULL)
 124     {
 125         Mdl = IoAllocateMdl(Irp->UserBuffer, BufferLength, FALSE, FALSE, Irp);
 126         if (Mdl == NULL)
 127         {
 128             return NULL;
 129         }
 130
 131         _SEH2_TRY
 132         {
 133             MmProbeAndLockPages(Mdl, Irp->RequestorMode, IoWriteAccess);
 134         }
 135         _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
 136         {
 137             IoFreeMdl(Mdl);
 138             Irp->MdlAddress = NULL;
 139             _SEH2_YIELD(return NULL);
 140         }
 141         _SEH2_END;
 142     }
 143
 144     return MmGetSystemAddressForMdlSafe(Irp->MdlAddress, NormalPagePriority);
 145 }
 146
 147 static
 148 VOID
 149 NTAPI
 150 PinInAnotherThread(IN PVOID Context)
 151 {
 152     BOOLEAN Ret;
 153     PULONG Buffer;
 154     PVOID Bcb;
 155     LARGE_INTEGER Offset;
 156     PTEST_CONTEXT TestContext;
 157
 158     ok(TestFileObject != NULL, "Called in invalid context!\n");
 159     ok_eq_ulong(TestTestId, 3);
 160
 161     TestContext = Context;
 162     ok(TestContext != NULL, "Called in invalid context!\n");
 163     ok(TestContext->Bcb != NULL, "Called in invalid context!\n");
 164     ok(TestContext->Buffer != NULL, "Called in invalid context!\n");
 165     ok(TestContext->Length != 0, "Called in invalid context!\n");
 166
 167     Ret = FALSE;
 168     Offset.QuadPart = 0x1000;
 169     KmtStartSeh();
 170     Ret = CcPinRead(TestFileObject, &Offset, TestContext->Length, PIN_WAIT, &Bcb, (PVOID *)&Buffer);
 171     KmtEndSeh(STATUS_SUCCESS);
 172
 173     if (!skip(Ret == TRUE, "CcPinRead failed\n"))
 174     {
 175         ok_eq_pointer(Bcb, TestContext->Bcb);
 176         ok_eq_pointer(Buffer, TestContext->Buffer);
 177
 178         CcUnpinData(Bcb);
 179     }
 180
 181     KmtStartSeh();
 182     Ret = CcPinRead(TestFileObject, &Offset, TestContext->Length, PIN_WAIT | PIN_IF_BCB, &Bcb, (PVOID *)&Buffer);
 183     KmtEndSeh(STATUS_SUCCESS);
 184
 185     if (!skip(Ret == TRUE, "CcPinRead failed\n"))
 186     {
 187         ok_eq_pointer(Bcb, TestContext->Bcb);
 188         ok_eq_pointer(Buffer, TestContext->Buffer);
 189
 190         CcUnpinData(Bcb);
 191     }
 192
 193     KmtStartSeh();
 194     Ret = CcPinRead(TestFileObject, &Offset, TestContext->Length, PIN_EXCLUSIVE, &Bcb, (PVOID *)&Buffer);
 195     KmtEndSeh(STATUS_SUCCESS);
 196
 197     if (!skip(Ret == TRUE, "CcPinRead failed\n"))
 198     {
 199         ok_eq_pointer(Bcb, TestContext->Bcb);
 200         ok_eq_pointer(Buffer, TestContext->Buffer);
 201
 202         CcUnpinData(Bcb);
 203     }
 204
 205     KmtStartSeh();
 206     Ret = CcMapData(TestFileObject, &Offset, TestContext->Length, MAP_WAIT, &Bcb, (PVOID *)&Buffer);
 207     KmtEndSeh(STATUS_SUCCESS);
 208
 209     if (!skip(Ret == TRUE, "CcMapData failed\n"))
 210     {
 211         ok(Bcb != TestContext->Bcb, "Returned same BCB!\n");
 212         ok_eq_pointer(Buffer, TestContext->Buffer);
 213
 214         CcUnpinData(Bcb);
 215     }
 216
 217     Offset.QuadPart = 0x1500;
 218     TestContext->Length -= 0x500;
 219
 220     KmtStartSeh();
 221     Ret = CcPinRead(TestFileObject, &Offset, TestContext->Length, PIN_WAIT | PIN_IF_BCB, &Bcb, (PVOID *)&Buffer);
 222     KmtEndSeh(STATUS_SUCCESS);
 223
 224     if (!skip(Ret == TRUE, "CcPinRead failed\n"))
 225     {
 226         ok_eq_pointer(Bcb, TestContext->Bcb);
 227         ok_eq_pointer(Buffer, (PVOID)((ULONG_PTR)TestContext->Buffer + 0x500));
 228
 229         CcUnpinData(Bcb);
 230     }
 231
 232     KmtStartSeh();
 233     Ret = CcPinRead(TestFileObject, &Offset, TestContext->Length, PIN_WAIT, &Bcb, (PVOID *)&Buffer);
 234     KmtEndSeh(STATUS_SUCCESS);
 235
 236     if (!skip(Ret == TRUE, "CcPinRead failed\n"))
 237     {
 238         ok_eq_pointer(Bcb, TestContext->Bcb);
 239         ok_eq_pointer(Buffer, (PVOID)((ULONG_PTR)TestContext->Buffer + 0x500));
 240
 241         CcUnpinData(Bcb);
 242     }
 243
 244     KmtStartSeh();
 245     Ret = CcPinRead(TestFileObject, &Offset, TestContext->Length, PIN_EXCLUSIVE, &Bcb, (PVOID *)&Buffer);
 246     KmtEndSeh(STATUS_SUCCESS);
 247
 248     if (!skip(Ret == TRUE, "CcPinRead failed\n"))
 249     {
 250         ok_eq_pointer(Bcb, TestContext->Bcb);
 251         ok_eq_pointer(Buffer, (PVOID)((ULONG_PTR)TestContext->Buffer + 0x500));
 252
 253         CcUnpinData(Bcb);
 254     }
 255
 256     return;
 257 }
 258
 259 static
 260 VOID
 261 NTAPI
 262 PinInAnotherThreadExclusive(IN PVOID Context)
 263 {
 264     BOOLEAN Ret;
 265     PULONG Buffer;
 266     PVOID Bcb;
 267     LARGE_INTEGER Offset;
 268     PTEST_CONTEXT TestContext;
 269
 270     ok(TestFileObject != NULL, "Called in invalid context!\n");
 271     ok_eq_ulong(TestTestId, 3);
 272
 273     TestContext = Context;
 274     ok(TestContext != NULL, "Called in invalid context!\n");
 275     ok(TestContext->Bcb != NULL, "Called in invalid context!\n");
 276     ok(TestContext->Buffer != NULL, "Called in invalid context!\n");
 277     ok(TestContext->Length != 0, "Called in invalid context!\n");
 278
 279     Ret = FALSE;
 280     Offset.QuadPart = 0x1000;
 281     KmtStartSeh();
 282     Ret = CcPinRead(TestFileObject, &Offset, TestContext->Length, PIN_EXCLUSIVE, &Bcb, (PVOID *)&Buffer);
 283     KmtEndSeh(STATUS_SUCCESS);
 284     ok(Ret == FALSE, "CcPinRead succeed\n");
 285
 286     if (Ret)
 287     {
 288         CcUnpinData(Bcb);
 289     }
 290
 291     KmtStartSeh();
 292     Ret = CcMapData(TestFileObject, &Offset, TestContext->Length, 0, &Bcb, (PVOID *)&Buffer);
 293     KmtEndSeh(STATUS_SUCCESS);
 294
 295     if (!skip(Ret == TRUE, "CcMapData failed\n"))
 296     {
 297         ok(Bcb != TestContext->Bcb, "Returned same BCB!\n");
 298         ok_eq_pointer(Buffer, TestContext->Buffer);
 299
 300         CcUnpinData(Bcb);
 301     }
 302
 303     Offset.QuadPart = 0x1500;
 304     TestContext->Length -= 0x500;
 305
 306     KmtStartSeh();
 307     Ret = CcPinRead(TestFileObject, &Offset, TestContext->Length, PIN_IF_BCB, &Bcb, (PVOID *)&Buffer);
 308     KmtEndSeh(STATUS_SUCCESS);
 309     ok(Ret == FALSE, "CcPinRead succeed\n");
 310
 311     if (Ret)
 312     {
 313         CcUnpinData(Bcb);
 314     }
 315
 316     KmtStartSeh();
 317     Ret = CcPinRead(TestFileObject, &Offset, TestContext->Length, 0, &Bcb, (PVOID *)&Buffer);
 318     KmtEndSeh(STATUS_SUCCESS);
 319     ok(Ret == FALSE, "CcPinRead succeed\n");
 320
 321     if (Ret)
 322     {
 323         CcUnpinData(Bcb);
 324     }
 325
 326     KmtStartSeh();
 327     Ret = CcMapData(TestFileObject, &Offset, TestContext->Length, 0, &Bcb, (PVOID *)&Buffer);
 328     KmtEndSeh(STATUS_SUCCESS);
 329
 330     if (!skip(Ret == TRUE, "CcMapData failed\n"))
 331     {
 332         ok(Bcb != TestContext->Bcb, "Returned same BCB!\n");
 333         ok_eq_pointer(Buffer, (PVOID)((ULONG_PTR)TestContext->Buffer + 0x500));
 334
 335         CcUnpinData(Bcb);
 336     }
 337
 338     return;
 339 }
 340
 341 static
 342 VOID
 343 PerformTest(
 344     ULONG TestId,
 345     PDEVICE_OBJECT DeviceObject)
 346 {
 347     PVOID Bcb;
 348     BOOLEAN Ret;
 349     PULONG Buffer;
 350     PTEST_FCB Fcb;
 351     LARGE_INTEGER Offset;
 352
 353     ok_eq_pointer(TestFileObject, NULL);
 354     ok_eq_pointer(TestDeviceObject, NULL);
 355     ok_eq_ulong(TestTestId, -1);
 356
 357     TestDeviceObject = DeviceObject;
 358     TestTestId = TestId;
 359     TestFileObject = IoCreateStreamFileObject(NULL, DeviceObject);
 360     if (!skip(TestFileObject != NULL, "Failed to allocate FO\n"))
 361     {
 362         Fcb = ExAllocatePool(NonPagedPool, sizeof(TEST_FCB));
 363         if (!skip(Fcb != NULL, "ExAllocatePool failed\n"))
 364         {
 365             BOOLEAN PinAccess = (TestId != 4);
 366
 367             RtlZeroMemory(Fcb, sizeof(TEST_FCB));
 368             ExInitializeFastMutex(&Fcb->HeaderMutex);
 369             FsRtlSetupAdvancedHeader(&Fcb->Header, &Fcb->HeaderMutex);
 370
 371             TestFileObject->FsContext = Fcb;
 372             TestFileObject->SectionObjectPointer = &Fcb->SectionObjectPointers;
 373
 374             KmtStartSeh();
 375             CcInitializeCacheMap(TestFileObject, &FileSizes, PinAccess, &Callbacks, NULL);
 376             KmtEndSeh(STATUS_SUCCESS);
 377
 378             if (!skip(CcIsFileCached(TestFileObject) == TRUE, "CcInitializeCacheMap failed\n"))
 379             {
 380                 if (TestId < 3)
 381                 {
 382                     Ret = FALSE;
 383                     Offset.QuadPart = TestId * 0x1000;
 384                     KmtStartSeh();
 385                     Ret = CcPinRead(TestFileObject, &Offset, FileSizes.FileSize.QuadPart - Offset.QuadPart, PIN_WAIT, &Bcb, (PVOID *)&Buffer);
 386                     KmtEndSeh(STATUS_SUCCESS);
 387
 388                     if (!skip(Ret == TRUE, "CcPinRead failed\n"))
 389                     {
 390                         ok_eq_ulong(Buffer[(0x3000 - TestId * 0x1000) / sizeof(ULONG)], 0xDEADBABE);
 391
 392                         CcUnpinData(Bcb);
 393                     }
 394                 }
 395                 else if (TestId == 3)
 396                 {
 397                     PTEST_CONTEXT TestContext;
 398
 399                     TestContext = ExAllocatePool(NonPagedPool, sizeof(TEST_CONTEXT));
 400                     if (!skip(Fcb != NULL, "ExAllocatePool failed\n"))
 401                     {
 402                         Ret = FALSE;
 403                         Offset.QuadPart = 0x1000;
 404
 405                         /* Try enforce BCB first */
 406                         KmtStartSeh();
 407                         Ret = CcPinRead(TestFileObject, &Offset, FileSizes.FileSize.QuadPart - Offset.QuadPart, PIN_WAIT | PIN_IF_BCB, &Bcb, (PVOID *)&Buffer);
 408                         KmtEndSeh(STATUS_SUCCESS);
 409                         ok(Ret == FALSE, "CcPinRead succeed\n");
 410                         if (Ret)
 411                         {
 412                             CcUnpinData(Bcb);
 413                         }
 414
 415                         KmtStartSeh();
 416                         Ret = CcPinRead(TestFileObject, &Offset, FileSizes.FileSize.QuadPart - Offset.QuadPart, PIN_WAIT, &TestContext->Bcb, &TestContext->Buffer);
 417                         KmtEndSeh(STATUS_SUCCESS);
 418
 419                         if (!skip(Ret == TRUE, "CcPinRead failed\n"))
 420                         {
 421                             PKTHREAD ThreadHandle;
 422
 423 #ifdef _X86_
 424                             /* FIXME: Should be fixed, will fail under certains conditions */
 425                             ok(TestContext->Buffer > (PVOID)0xC1000000 && TestContext->Buffer < (PVOID)0xDCFFFFFF,
 426                                "Buffer %p not mapped in system space\n", TestContext->Buffer);
 427 #else
 428 #ifdef _M_AMD64
 429                             ok(TestContext->Buffer > (PVOID)0xFFFFF98000000000 && TestContext->Buffer < (PVOID)0xFFFFFA8000000000,
 430                                "Buffer %p not mapped in system space\n", TestContext->Buffer);
 431 #else
 432                             skip(FALSE, "System space mapping not defined\n");
 433 #endif
 434 #endif
 435
 436                             TestContext->Length = FileSizes.FileSize.QuadPart - Offset.QuadPart;
 437                             ThreadHandle = KmtStartThread(PinInAnotherThread, TestContext);
 438                             KmtFinishThread(ThreadHandle, NULL);
 439
 440                             TestContext->Length = FileSizes.FileSize.QuadPart - 2 * Offset.QuadPart;
 441                             ThreadHandle = KmtStartThread(PinInAnotherThread, TestContext);
 442                             KmtFinishThread(ThreadHandle, NULL);
 443
 444                             CcUnpinData(TestContext->Bcb);
 445                         }
 446
 447                         KmtStartSeh();
 448                         Ret = CcPinRead(TestFileObject, &Offset, FileSizes.FileSize.QuadPart - Offset.QuadPart, PIN_WAIT | PIN_EXCLUSIVE, &TestContext->Bcb, &TestContext->Buffer);
 449                         KmtEndSeh(STATUS_SUCCESS);
 450
 451                         if (!skip(Ret == TRUE, "CcPinRead failed\n"))
 452                         {
 453                             PKTHREAD ThreadHandle;
 454
 455                             TestContext->Length = FileSizes.FileSize.QuadPart - Offset.QuadPart;
 456                             ThreadHandle = KmtStartThread(PinInAnotherThreadExclusive, TestContext);
 457                             KmtFinishThread(ThreadHandle, NULL);
 458
 459                             CcUnpinData(TestContext->Bcb);
 460                         }
 461
 462                         ExFreePool(TestContext);
 463                     }
 464                 }
 465                 else if (TestId == 4)
 466                 {
 467                     Ret = FALSE;
 468                     Offset.QuadPart = 0x1000;
 469                     KmtStartSeh();
 470                     Ret = CcPinRead(TestFileObject, &Offset, FileSizes.FileSize.QuadPart - Offset.QuadPart, PIN_WAIT, &Bcb, (PVOID *)&Buffer);
 471                     KmtEndSeh(STATUS_SUCCESS);
 472
 473                     if (!skip(Ret == TRUE, "CcPinRead failed\n"))
 474                     {
 475                         ok_eq_ulong(Buffer[0x2000 / sizeof(ULONG)], 0);
 476
 477                         CcUnpinData(Bcb);
 478                     }
 479                 }
 480             }
 481         }
 482     }
 483 }
 484
 485
 486 static
 487 VOID
 488 CleanupTest(
 489     ULONG TestId,
 490     PDEVICE_OBJECT DeviceObject)
 491 {
 492     LARGE_INTEGER Zero = RTL_CONSTANT_LARGE_INTEGER(0LL);
 493     CACHE_UNINITIALIZE_EVENT CacheUninitEvent;
 494
 495     ok_eq_pointer(TestDeviceObject, DeviceObject);
 496     ok_eq_ulong(TestTestId, TestId);
 497
 498     if (!skip(TestFileObject != NULL, "No test FO\n"))
 499     {
 500         if (CcIsFileCached(TestFileObject))
 501         {
 502             KeInitializeEvent(&CacheUninitEvent.Event, NotificationEvent, FALSE);
 503             CcUninitializeCacheMap(TestFileObject, &Zero, &CacheUninitEvent);
 504             KeWaitForSingleObject(&CacheUninitEvent.Event, Executive, KernelMode, FALSE, NULL);
 505         }
 506
 507         if (TestFileObject->FsContext != NULL)
 508         {
 509             ExFreePool(TestFileObject->FsContext);
 510             TestFileObject->FsContext = NULL;
 511             TestFileObject->SectionObjectPointer = NULL;
 512         }
 513
 514         ObDereferenceObject(TestFileObject);
 515     }
 516
 517     TestFileObject = NULL;
 518     TestDeviceObject = NULL;
 519     TestTestId = -1;
 520 }
 521
 522
 523 static
 524 NTSTATUS
 525 TestMessageHandler(
 526     _In_ PDEVICE_OBJECT DeviceObject,
 527     _In_ ULONG ControlCode,
 528     _In_opt_ PVOID Buffer,
 529     _In_ SIZE_T InLength,
 530     _Inout_ PSIZE_T OutLength)
 531 {
 532     NTSTATUS Status = STATUS_SUCCESS;
 533
 534     FsRtlEnterFileSystem();
 535
 536     switch (ControlCode)
 537     {
 538         case IOCTL_START_TEST:
 539             ok_eq_ulong((ULONG)InLength, sizeof(ULONG));
 540             PerformTest(*(PULONG)Buffer, DeviceObject);
 541             break;
 542
 543         case IOCTL_FINISH_TEST:
 544             ok_eq_ulong((ULONG)InLength, sizeof(ULONG));
 545             CleanupTest(*(PULONG)Buffer, DeviceObject);
 546             break;
 547
 548         default:
 549             Status = STATUS_NOT_IMPLEMENTED;
 550             break;
 551     }
 552
 553     FsRtlExitFileSystem();
 554
 555     return Status;
 556 }
 557
 558 static
 559 NTSTATUS
 560 TestIrpHandler(
 561     _In_ PDEVICE_OBJECT DeviceObject,
 562     _In_ PIRP Irp,
 563     _In_ PIO_STACK_LOCATION IoStack)
 564 {
 565     NTSTATUS Status;
 566
 567     PAGED_CODE();
 568
 569     DPRINT("IRP %x/%x\n", IoStack->MajorFunction, IoStack->MinorFunction);
 570     ASSERT(IoStack->MajorFunction == IRP_MJ_READ);
 571
 572     FsRtlEnterFileSystem();
 573
 574     Status = STATUS_NOT_SUPPORTED;
 575     Irp->IoStatus.Information = 0;
 576
 577     if (IoStack->MajorFunction == IRP_MJ_READ)
 578     {
 579         PMDL Mdl;
 580         ULONG Length;
 581         PVOID Buffer;
 582         LARGE_INTEGER Offset;
 583
 584         Offset = IoStack->Parameters.Read.ByteOffset;
 585         Length = IoStack->Parameters.Read.Length;
 586
 587         ok_eq_pointer(DeviceObject, TestDeviceObject);
 588         ok_eq_pointer(IoStack->FileObject, TestFileObject);
 589
 590         ok(FlagOn(Irp->Flags, IRP_NOCACHE), "Not coming from Cc\n");
 591
 592         ok_irql(APC_LEVEL);
 593         ok((Offset.QuadPart % PAGE_SIZE == 0 || Offset.QuadPart == 0), "Offset is not aligned: %I64i\n", Offset.QuadPart);
 594         ok(Length % PAGE_SIZE == 0, "Length is not aligned: %I64i\n", Length);
 595
 596         ok(Irp->AssociatedIrp.SystemBuffer == NULL, "A SystemBuffer was allocated!\n");
 597         Buffer = MapAndLockUserBuffer(Irp, Length);
 598         ok(Buffer != NULL, "Null pointer!\n");
 599         RtlFillMemory(Buffer, Length, 0xBA);
 600
 601         Status = STATUS_SUCCESS;
 602         if (Offset.QuadPart <= 0x3000 && Offset.QuadPart + Length > 0x3000)
 603         {
 604             *(PULONG)((ULONG_PTR)Buffer + (ULONG_PTR)(0x3000 - Offset.QuadPart)) = 0xDEADBABE;
 605         }
 606
 607         Mdl = Irp->MdlAddress;
 608         ok(Mdl != NULL, "Null pointer for MDL!\n");
 609         ok((Mdl->MdlFlags & MDL_PAGES_LOCKED) != 0, "MDL not locked\n");
 610         ok((Mdl->MdlFlags & MDL_SOURCE_IS_NONPAGED_POOL) == 0, "MDL from non paged\n");
 611         ok((Mdl->MdlFlags & MDL_IO_PAGE_READ) != 0, "Non paging IO\n");
 612         ok((Irp->Flags & IRP_PAGING_IO) != 0, "Non paging IO\n");
 613
 614         Irp->IoStatus.Information = Length;
 615     }
 616
 617     if (Status == STATUS_PENDING)
 618     {
 619         IoMarkIrpPending(Irp);
 620         IoCompleteRequest(Irp, IO_NO_INCREMENT);
 621         Status = STATUS_PENDING;
 622     }
 623     else
 624     {
 625         Irp->IoStatus.Status = Status;
 626         IoCompleteRequest(Irp, IO_NO_INCREMENT);
 627     }
 628
 629     FsRtlExitFileSystem();
 630
 631     return Status;
 632 }