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[KMTESTS] Add more tests for CcCopyWrite

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This commit is contained in:
Jérôme Gardou 2020-12-08 09:02:28 +01:00
parent 016dc28793
commit 08cf040dd5
2 changed files with 158 additions and 17 deletions
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162
modules/rostests/kmtests/ntos_cc/CcCopyWrite_drv.c
View file

@ -22,6 +22,11 @@ static PFILE_OBJECT TestFileObject;
static PDEVICE_OBJECT TestDeviceObject;
static KMT_IRP_HANDLER TestIrpHandler;
static FAST_IO_DISPATCH TestFastIoDispatch;
static BOOLEAN InBehaviourTest;
BOOLEAN ReadCalled;
LARGE_INTEGER ReadOffset;
ULONG ReadLength;
static
BOOLEAN
@ -169,6 +174,101 @@ MapAndLockUserBuffer(
return MmGetSystemAddressForMdlSafe(Irp->MdlAddress, NormalPagePriority);
}
static
void
reset_read(void)
{
ReadCalled = FALSE;
ReadOffset.QuadPart = MAXLONGLONG;
ReadLength = MAXULONG;
}
#define ok_read_called(_Offset, _Length) do { \
ok(ReadCalled, "CcCopyWrite should have triggerred a read.\n"); \
ok_eq_longlong(ReadOffset.QuadPart, _Offset); \
ok_eq_ulong(ReadLength, _Length); \
}while(0)
#define ok_read_not_called() ok(!ReadCalled, "CcCopyWrite shouldn't have triggered a read.\n")
static
VOID
Test_CcCopyWrite(PFILE_OBJECT FileObject)
{
BOOLEAN Ret;
LARGE_INTEGER Offset;
CHAR Buffer[10];
memset(Buffer, 0xAC, 10);
/* Test bogus file object & file offset */
Ret = 'x';
KmtStartSeh()
Ret = CcCopyWrite(FileObject, NULL, 0, FALSE, NULL);
KmtEndSeh(STATUS_ACCESS_VIOLATION);
ok_eq_char(Ret, 'x');
Ret = 'x';
Offset.QuadPart = 0;
KmtStartSeh()
Ret = CcCopyWrite(NULL, &Offset, 10, FALSE, Buffer);
KmtEndSeh(STATUS_ACCESS_VIOLATION);
ok_eq_char(Ret, 'x');
/* What happens on invalid buffer */
Ret = 'x';
Offset.QuadPart = 0;
reset_read();
KmtStartSeh()
Ret = CcCopyWrite(FileObject, &Offset, 0, TRUE, NULL);
KmtEndSeh(STATUS_SUCCESS);
ok_bool_true(Ret, "CcCopyWrite(0, NULL) should succeed\n");
/* When there is nothing to write, there is no reason to read */
ok_read_not_called();
Ret = 'x';
Offset.QuadPart = 0;
reset_read();
KmtStartSeh()
Ret = CcCopyWrite(FileObject, &Offset, 10, TRUE, NULL);
KmtEndSeh(STATUS_INVALID_USER_BUFFER);
ok_eq_char(Ret, 'x');
/* This raises an exception, but it actually triggered a read */
ok_read_called(0, PAGE_SIZE);
/* So this one succeeds, as the page is now resident */
Ret = 'x';
Offset.QuadPart = 0;
reset_read();
KmtStartSeh()
Ret = CcCopyWrite(FileObject, &Offset, 10, FALSE, Buffer);
KmtEndSeh(STATUS_SUCCESS);
ok_bool_true(Ret, "CcCopyWrite should succeed\n");
/* But there was no read triggered, as the page is already resident. */
ok_read_not_called();
/* But this one doesn't */
Ret = 'x';
Offset.QuadPart = PAGE_SIZE;
reset_read();
KmtStartSeh()
Ret = CcCopyWrite(FileObject, &Offset, 10, FALSE, Buffer);
KmtEndSeh(STATUS_SUCCESS);
ok_bool_false(Ret, "CcCopyWrite should fail\n");
/* But it triggered a read anyway. */
ok_read_called(PAGE_SIZE, PAGE_SIZE);
/* Of course, waiting for it succeeds and triggers the read */
Ret = 'x';
Offset.QuadPart = PAGE_SIZE * 2;
reset_read();
KmtStartSeh()
Ret = CcCopyWrite(FileObject, &Offset, 10, TRUE, Buffer);
KmtEndSeh(STATUS_SUCCESS);
ok_bool_true(Ret, "CcCopyWrite should succeed\n");
ok_read_called(PAGE_SIZE * 2, PAGE_SIZE);
}
static
NTSTATUS
@ -238,7 +338,7 @@ TestIrpHandler(
IoStack->FileObject->FsContext = Fcb;
IoStack->FileObject->SectionObjectPointer = &Fcb->SectionObjectPointers;
CcInitializeCacheMap(IoStack->FileObject,
CcInitializeCacheMap(IoStack->FileObject,
(PCC_FILE_SIZES)&Fcb->Header.AllocationSize,
FALSE, &Callbacks, NULL);
@ -264,6 +364,10 @@ TestIrpHandler(
ok((Offset.QuadPart == 0 || Offset.QuadPart == 4096 || Offset.QuadPart == 8192), "Unexpected offset: %I64i\n", Offset.QuadPart);
ok(Length % PAGE_SIZE == 0, "Length is not aligned: %I64i\n", Length);
ReadCalled = TRUE;
ReadOffset = Offset;
ReadLength = Length;
ok(Irp->AssociatedIrp.SystemBuffer == NULL, "A SystemBuffer was allocated!\n");
Buffer = MapAndLockUserBuffer(Irp, Length);
ok(Buffer != NULL, "Null pointer!\n");
@ -287,40 +391,64 @@ TestIrpHandler(
ULONG Length;
PVOID Buffer;
LARGE_INTEGER Offset;
static const UNICODE_STRING BehaviourTestFileName = RTL_CONSTANT_STRING(L"\\BehaviourTestFile");
Offset = IoStack->Parameters.Read.ByteOffset;
Length = IoStack->Parameters.Read.Length;
Fcb = IoStack->FileObject->FsContext;
ok_bool_false(InBehaviourTest, "Shouldn't trigger write from CcCopyWrite\n");
/* Check special file name */
InBehaviourTest = RtlCompareUnicodeString(&IoStack->FileObject->FileName, &BehaviourTestFileName, TRUE) == 0;
if (!FlagOn(Irp->Flags, IRP_NOCACHE))
{
BOOLEAN Ret;
ok_irql(PASSIVE_LEVEL);
Buffer = Irp->AssociatedIrp.SystemBuffer;
ok(Buffer != NULL, "Null pointer!\n");
Fcb->WriteLength = Length;
_SEH2_TRY
if (InBehaviourTest)
{
Ret = CcCopyWrite(IoStack->FileObject, &Offset, Length, TRUE, Buffer);
ok_bool_true(Ret, "CcCopyWrite");
Test_CcCopyWrite(IoStack->FileObject);
Status = Irp->IoStatus.Status = STATUS_SUCCESS;
}
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
else
{
Irp->IoStatus.Status = _SEH2_GetExceptionCode();
}
_SEH2_END;
Buffer = Irp->AssociatedIrp.SystemBuffer;
ok(Buffer != NULL, "Null pointer!\n");
Status = Irp->IoStatus.Status;
Fcb->WriteLength = Length;
_SEH2_TRY
{
Ret = CcCopyWrite(IoStack->FileObject, &Offset, Length, TRUE, Buffer);
ok_bool_true(Ret, "CcCopyWrite");
}
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
Irp->IoStatus.Status = _SEH2_GetExceptionCode();
}
_SEH2_END;
Status = Irp->IoStatus.Status;
}
}
else
{
ok_irql(PASSIVE_LEVEL);
ok((Offset.QuadPart == 0 || Offset.QuadPart == 4096), "Unexpected offset: %I64i\n", Offset.QuadPart);
ok_eq_ulong(Length, ROUND_TO_PAGES(Fcb->WriteLength));
if (InBehaviourTest)
{
/* We wrote only to the 1st and 3rd page */
ok((Offset.QuadPart == 0) || (Offset.QuadPart == PAGE_SIZE * 2), "Expected a non-cached write on 1st or 3rd page\n");
/* We wrote that much with CcCopyWrite */
ok_eq_ulong(Length, PAGE_SIZE);
}
else
{
ok((Offset.QuadPart == 0 || Offset.QuadPart == 4096), "Unexpected offset: %I64i\n", Offset.QuadPart);
ok_eq_ulong(Length, ROUND_TO_PAGES(Fcb->WriteLength));
}
ok(Irp->AssociatedIrp.SystemBuffer == NULL, "A SystemBuffer was allocated!\n");
Buffer = MapAndLockUserBuffer(Irp, Length);
@ -335,6 +463,8 @@ TestIrpHandler(
ok((Mdl->MdlFlags & MDL_IO_PAGE_READ) == 0, "MDL for read paging IO\n");
ok((Irp->Flags & IRP_PAGING_IO) != 0, "Non paging IO\n");
}
InBehaviourTest = FALSE;
}
else if (IoStack->MajorFunction == IRP_MJ_FLUSH_BUFFERS)
{

13
modules/rostests/kmtests/ntos_cc/CcCopyWrite_user.c
View file

@ -19,7 +19,8 @@ START_TEST(CcCopyWrite)
UNICODE_STRING SmallFile = RTL_CONSTANT_STRING(L"\\Device\\Kmtest-CcCopyWrite\\SmallFile");
UNICODE_STRING VerySmallFile = RTL_CONSTANT_STRING(L"\\Device\\Kmtest-CcCopyWrite\\VerySmallFile");
UNICODE_STRING NormalFile = RTL_CONSTANT_STRING(L"\\Device\\Kmtest-CcCopyWrite\\NormalFile");
UNICODE_STRING BehaviourTestFile = RTL_CONSTANT_STRING(L"\\Device\\Kmtest-CcCopyWrite\\BehaviourTestFile");
KmtLoadDriver(L"CcCopyWrite", FALSE);
KmtOpenDriver();
@ -88,6 +89,16 @@ START_TEST(CcCopyWrite)
NtClose(Handle);
InitializeObjectAttributes(&ObjectAttributes, &BehaviourTestFile, OBJ_CASE_INSENSITIVE, NULL, NULL);
Status = NtOpenFile(&Handle, FILE_ALL_ACCESS, &ObjectAttributes, &IoStatusBlock, 0, FILE_NON_DIRECTORY_FILE | FILE_SYNCHRONOUS_IO_NONALERT);
ok_eq_hex(Status, STATUS_SUCCESS);
ByteOffset.QuadPart = 4097;
Status = NtWriteFile(Handle, NULL, NULL, NULL, &IoStatusBlock, Buffer, 4097, &ByteOffset, NULL);
ok_eq_hex(Status, STATUS_SUCCESS);
NtClose(Handle);
RtlFreeHeap(RtlGetProcessHeap(), 0, Buffer);
KmtCloseDriver();
KmtUnloadDriver();