[pschweitzer] 71091: [KMTESTS:FSRTL] Add more tests for LargeMcb functions. These are not invented but real cases: they are extracted from Ext2Fsd driver attempting to read a file from disk. The re...

Author: pschweitzer
Date: Sun Apr  3 10:25:32 2016
New Revision: 71091

URL: http://svn.reactos.org/svn/reactos?rev=71091&view=rev
Log:
[KMTESTS:FSRTL]
Add more tests for LargeMcb functions.

These are not invented but real cases: they are extracted from Ext2Fsd driver attempting to read a file from disk. The read file in ReactOS is totally corrupted.

This shows how broken our current MCB implementation is. And unfortunately confirms CORE-11002.
I recommend not to import any other FSDs relying on MCB as long as this is not fixed (eg. CORE-11040); it makes them pretty pointless.

CORE-11002

Modified:
    trunk/rostests/kmtests/ntos_fsrtl/FsRtlMcb.c

Modified: trunk/rostests/kmtests/ntos_fsrtl/FsRtlMcb.c
URL: http://svn.reactos.org/svn/reactos/trunk/rostests/kmtests/ntos_fsrtl/FsRtlMc...
==============================================================================
--- trunk/rostests/kmtests/ntos_fsrtl/FsRtlMcb.c	[iso-8859-1] (original)
+++ trunk/rostests/kmtests/ntos_fsrtl/FsRtlMcb.c	[iso-8859-1] Sun Apr  3 10:25:32 2016
@@ -278,8 +278,330 @@
     FsRtlUninitializeLargeMcb(&LargeMcb);
 }

+static VOID FsRtlLargeMcbTestsExt2()
+{
+    LARGE_MCB FirstMcb, SecondMcb;
+    LONGLONG Lbn, SectorCountFromLbn, StartingLbn, SectorCountFromStartingLbn, Vbn, SectorCount;
+    ULONG Index, NbRuns;
+    BOOLEAN Result;
+
+    FsRtlInitializeLargeMcb(&FirstMcb, PagedPool);
+    FsRtlInitializeLargeMcb(&SecondMcb, PagedPool);
+
+    FsRtlTruncateLargeMcb(&FirstMcb, 0);
+    FsRtlTruncateLargeMcb(&SecondMcb, 0);
+
+    Result = FsRtlLookupLargeMcbEntry(&FirstMcb, 1, &Lbn, &SectorCountFromLbn, NULL, NULL, NULL);
+    ok(Result == FALSE, "Expected FALSE, got TRUE\n");
+
+    Result = FsRtlAddLargeMcbEntry(&FirstMcb, 1, 198657, 1);
+    ok(Result == TRUE, "Expected TRUE, got FALSE\n");
+
+    DumpAllRuns(&FirstMcb);
+
+    NbRuns = FsRtlNumberOfRunsInLargeMcb(&FirstMcb);
+    ok(NbRuns == 2, "Expected 2 runs, got: %lu\n", NbRuns);
+
+    Result = FsRtlLookupLargeMcbEntry(&FirstMcb, 1, &Lbn, &SectorCountFromLbn, &StartingLbn, &SectorCountFromStartingLbn, &Index);
+    ok(Result == TRUE, "Expected TRUE, got FALSE\n");
+    ok(Lbn == 198657LL, "Expected Lbn 198657, got: %I64d\n", Lbn);
+    ok(SectorCountFromLbn == 1LL, "Expected SectorCountFromLbn 1, got: %I64d\n", SectorCountFromLbn);
+    ok(StartingLbn == 198657LL, "Expected StartingLbn 198657, got: %I64d\n", StartingLbn);
+    ok(SectorCountFromStartingLbn == 1LL, "Expected SectorCountFromStartingLbn 1, got: %I64d\n", SectorCountFromStartingLbn);
+    ok(Index == 1, "Expected Index 1, got: %d\n", Index);
+
+    Result = FsRtlLookupLargeMcbEntry(&FirstMcb, 2, &Lbn, &SectorCountFromLbn, NULL, NULL, NULL);
+    ok(Result == FALSE, "Expected FALSE, got TRUE\n");
+
+    Result = FsRtlAddLargeMcbEntry(&FirstMcb, 2, 199169, 11);
+    ok(Result == TRUE, "Expected TRUE, got FALSE\n");
+
+    DumpAllRuns(&FirstMcb);
+
+    NbRuns = FsRtlNumberOfRunsInLargeMcb(&FirstMcb);
+    ok(NbRuns == 3, "Expected 3 runs, got: %lu\n", NbRuns);
+
+    Result = FsRtlLookupLargeMcbEntry(&FirstMcb, 2, &Lbn, &SectorCountFromLbn, &StartingLbn, &SectorCountFromStartingLbn, &Index);
+    ok(Result == TRUE, "Expected TRUE, got FALSE\n");
+    ok(Lbn == 199169LL, "Expected Lbn 199169, got: %I64d\n", Lbn);
+    ok(SectorCountFromLbn == 11LL, "Expected SectorCountFromLbn 11, got: %I64d\n", SectorCountFromLbn);
+    ok(StartingLbn == 199169LL, "Expected StartingLbn 199169, got: %I64d\n", StartingLbn);
+    ok(SectorCountFromStartingLbn == 11LL, "Expected SectorCountFromStartingLbn 11, got: %I64d\n", SectorCountFromStartingLbn);
+    ok(Index == 2, "Expected Index 2, got: %d\n", Index);
+
+    Result = FsRtlGetNextLargeMcbEntry(&FirstMcb, 0, &Vbn, &Lbn, &SectorCount);
+    ok(Result == TRUE, "Expected TRUE, got FALSE\n");
+    ok(Vbn == 0LL, "Expected Vbn 0, got: %I64d\n", Vbn);
+    ok(Lbn == -1LL, "Expected Lbn -1, got: %I64d\n", Lbn);
+    ok(SectorCount == 1LL, "Expected SectorCount 1, got: %I64d\n", SectorCount);
+
+    Result = FsRtlGetNextLargeMcbEntry(&FirstMcb, 1, &Vbn, &Lbn, &SectorCount);
+    ok(Result == TRUE, "Expected TRUE, got FALSE\n");
+    ok(Vbn == 1LL, "Expected Vbn 1, got: %I64d\n", Vbn);
+    ok(Lbn == 198657LL, "Expected Lbn 198657, got: %I64d\n", Lbn);
+    ok(SectorCount == 1LL, "Expected SectorCount 1, got: %I64d\n", SectorCount);
+
+    Result = FsRtlGetNextLargeMcbEntry(&FirstMcb, 2, &Vbn, &Lbn, &SectorCount);
+    ok(Result == TRUE, "Expected TRUE, got FALSE\n");
+    ok(Vbn == 2LL, "Expected Vbn 2, got: %I64d\n", Vbn);
+    ok(Lbn == 199169LL, "Expected Lbn 199169, got: %I64d\n", Lbn);
+    ok(SectorCount == 11LL, "Expected SectorCount 11, got: %I64d\n", SectorCount);
+
+    Result = FsRtlGetNextLargeMcbEntry(&FirstMcb, 3, &Vbn, &Lbn, &SectorCount);
+    ok(Result == FALSE, "Expected FALSE, got TRUE\n");
+
+    Result = FsRtlAddLargeMcbEntry(&SecondMcb, 197128, 197128, 1);
+    ok(Result == TRUE, "Expected TRUE, got FALSE\n");
+
+    Result = FsRtlLookupLargeMcbEntry(&SecondMcb, 197128, &Lbn, &SectorCountFromLbn, &StartingLbn, &SectorCountFromStartingLbn, &Index);
+    ok(Result == TRUE, "Expected TRUE, got FALSE\n");
+    ok(Lbn == 197128LL, "Expected Lbn 197128, got: %I64d\n", Lbn);
+    ok(SectorCountFromLbn == 1LL, "Expected SectorCountFromLbn 1, got: %I64d\n", SectorCountFromLbn);
+    ok(StartingLbn == 197128LL, "Expected StartingLbn 197128, got: %I64d\n", StartingLbn);
+    ok(SectorCountFromStartingLbn == 1LL, "Expected SectorCountFromStartingLbn 1, got: %I64d\n", SectorCountFromStartingLbn);
+    ok(Index == 1, "Expected Index 1, got: %d\n", Index);
+
+    Result = FsRtlLookupLargeMcbEntry(&FirstMcb, 13, &Lbn, &SectorCountFromLbn, NULL, NULL, NULL);
+    ok(Result == FALSE, "Expected FALSE, got TRUE\n");
+
+    Result = FsRtlAddLargeMcbEntry(&FirstMcb, 13, 199180, 4);
+    ok(Result == TRUE, "Expected TRUE, got FALSE\n");
+
+    DumpAllRuns(&FirstMcb);
+
+    NbRuns = FsRtlNumberOfRunsInLargeMcb(&FirstMcb);
+    ok(NbRuns == 3, "Expected 3 runs, got: %lu\n", NbRuns);
+
+    Result = FsRtlLookupLargeMcbEntry(&FirstMcb, 13, &Lbn, &SectorCountFromLbn, &StartingLbn, &SectorCountFromStartingLbn, &Index);
+    ok(Result == TRUE, "Expected TRUE, got FALSE\n");
+    ok(Lbn == 199180LL, "Expected Lbn 199180, got: %I64d\n", Lbn);
+    ok(SectorCountFromLbn == 4LL, "Expected SectorCountFromLbn 4, got: %I64d\n", SectorCountFromLbn);
+    ok(StartingLbn == 199169LL, "Expected StartingLbn 199169, got: %I64d\n", StartingLbn);
+    ok(SectorCountFromStartingLbn == 15LL, "Expected SectorCountFromStartingLbn 15, got: %I64d\n", SectorCountFromStartingLbn);
+    ok(Index == 2, "Expected Index 2, got: %d\n", Index);
+
+    Result = FsRtlGetNextLargeMcbEntry(&FirstMcb, 0, &Vbn, &Lbn, &SectorCount);
+    ok(Result == TRUE, "Expected TRUE, got FALSE\n");
+    ok(Vbn == 0LL, "Expected Vbn 0, got: %I64d\n", Vbn);
+    ok(Lbn == -1LL, "Expected Lbn -1, got: %I64d\n", Lbn);
+    ok(SectorCount == 1LL, "Expected SectorCount 1, got: %I64d\n", SectorCount);
+
+    Result = FsRtlGetNextLargeMcbEntry(&FirstMcb, 1, &Vbn, &Lbn, &SectorCount);
+    ok(Result == TRUE, "Expected TRUE, got FALSE\n");
+    ok(Vbn == 1LL, "Expected Vbn 1, got: %I64d\n", Vbn);
+    ok(Lbn == 198657LL, "Expected Lbn 198657, got: %I64d\n", Lbn);
+    ok(SectorCount == 1LL, "Expected SectorCount 1, got: %I64d\n", SectorCount);
+
+    Result = FsRtlGetNextLargeMcbEntry(&FirstMcb, 2, &Vbn, &Lbn, &SectorCount);
+    ok(Result == TRUE, "Expected TRUE, got FALSE\n");
+    ok(Vbn == 2LL, "Expected Vbn 2, got: %I64d\n", Vbn);
+    ok(Lbn == 199169LL, "Expected Lbn 199169, got: %I64d\n", Lbn);
+    ok(SectorCount == 15LL, "Expected SectorCount 15, got: %I64d\n", SectorCount);
+
+    Result = FsRtlGetNextLargeMcbEntry(&FirstMcb, 3, &Vbn, &Lbn, &SectorCount);
+    ok(Result == FALSE, "Expected FALSE, got TRUE\n");
+
+    Result = FsRtlAddLargeMcbEntry(&SecondMcb, 197128, 197128, 1);
+    ok(Result == TRUE, "Expected TRUE, got FALSE\n");
+
+    Result = FsRtlLookupLargeMcbEntry(&SecondMcb, 197128, &Lbn, &SectorCountFromLbn, &StartingLbn, &SectorCountFromStartingLbn, &Index);
+    ok(Result == TRUE, "Expected TRUE, got FALSE\n");
+    ok(Lbn == 197128LL, "Expected Lbn 197128, got: %I64d\n", Lbn);
+    ok(SectorCountFromLbn == 1LL, "Expected SectorCountFromLbn 1, got: %I64d\n", SectorCountFromLbn);
+    ok(StartingLbn == 197128LL, "Expected StartingLbn 197128, got: %I64d\n", StartingLbn);
+    ok(SectorCountFromStartingLbn == 1LL, "Expected SectorCountFromStartingLbn 1, got: %I64d\n", SectorCountFromStartingLbn);
+    ok(Index == 1, "Expected Index 1, got: %d\n", Index);
+
+    Result = FsRtlLookupLargeMcbEntry(&FirstMcb, 17, &Lbn, &SectorCountFromLbn, NULL, NULL, NULL);
+    ok(Result == FALSE, "Expected FALSE, got TRUE\n");
+
+    Result = FsRtlAddLargeMcbEntry(&FirstMcb, 17, 1105, 16);
+    ok(Result == TRUE, "Expected TRUE, got FALSE\n");
+
+    DumpAllRuns(&FirstMcb);
+
+    NbRuns = FsRtlNumberOfRunsInLargeMcb(&FirstMcb);
+    ok(NbRuns == 4, "Expected 4 runs, got: %lu\n", NbRuns);
+
+    Result = FsRtlLookupLargeMcbEntry(&FirstMcb, 17, &Lbn, &SectorCountFromLbn, &StartingLbn, &SectorCountFromStartingLbn, &Index);
+    ok(Result == TRUE, "Expected TRUE, got FALSE\n");
+    ok(Lbn == 1105LL, "Expected Lbn 1105, got: %I64d\n", Lbn);
+    ok(SectorCountFromLbn == 16LL, "Expected SectorCountFromLbn 16, got: %I64d\n", SectorCountFromLbn);
+    ok(StartingLbn == 1105LL, "Expected StartingLbn 1105, got: %I64d\n", StartingLbn);
+    ok(SectorCountFromStartingLbn == 16LL, "Expected SectorCountFromStartingLbn 16, got: %I64d\n", SectorCountFromStartingLbn);
+    ok(Index == 3, "Expected Index 3, got: %d\n", Index);
+
+    Result = FsRtlGetNextLargeMcbEntry(&FirstMcb, 0, &Vbn, &Lbn, &SectorCount);
+    ok(Result == TRUE, "Expected TRUE, got FALSE\n");
+    ok(Vbn == 0LL, "Expected Vbn 0, got: %I64d\n", Vbn);
+    ok(Lbn == -1LL, "Expected Lbn -1, got: %I64d\n", Lbn);
+    ok(SectorCount == 1LL, "Expected SectorCount 1, got: %I64d\n", SectorCount);
+
+    Result = FsRtlGetNextLargeMcbEntry(&FirstMcb, 1, &Vbn, &Lbn, &SectorCount);
+    ok(Result == TRUE, "Expected TRUE, got FALSE\n");
+    ok(Vbn == 1LL, "Expected Vbn 1, got: %I64d\n", Vbn);
+    ok(Lbn == 198657LL, "Expected Lbn 198657, got: %I64d\n", Lbn);
+    ok(SectorCount == 1LL, "Expected SectorCount 1, got: %I64d\n", SectorCount);
+
+    Result = FsRtlGetNextLargeMcbEntry(&FirstMcb, 2, &Vbn, &Lbn, &SectorCount);
+    ok(Result == TRUE, "Expected TRUE, got FALSE\n");
+    ok(Vbn == 2LL, "Expected Vbn 2, got: %I64d\n", Vbn);
+    ok(Lbn == 199169LL, "Expected Lbn 199169, got: %I64d\n", Lbn);
+    ok(SectorCount == 15LL, "Expected SectorCount 15, got: %I64d\n", SectorCount);
+
+    Result = FsRtlGetNextLargeMcbEntry(&FirstMcb, 3, &Vbn, &Lbn, &SectorCount);
+    ok(Result == TRUE, "Expected TRUE, got FALSE\n");
+    ok(Vbn == 17LL, "Expected Vbn 17, got: %I64d\n", Vbn);
+    ok(Lbn == 1105LL, "Expected Lbn 1105, got: %I64d\n", Lbn);
+    ok(SectorCount == 16LL, "Expected SectorCount 16, got: %I64d\n", SectorCount);
+
+    Result = FsRtlGetNextLargeMcbEntry(&FirstMcb, 4, &Vbn, &Lbn, &SectorCount);
+    ok(Result == FALSE, "Expected FALSE, got TRUE\n");
+
+    Result = FsRtlAddLargeMcbEntry(&SecondMcb, 197128, 197128, 1);
+    ok(Result == TRUE, "Expected TRUE, got FALSE\n");
+
+    Result = FsRtlLookupLargeMcbEntry(&SecondMcb, 197128, &Lbn, &SectorCountFromLbn, &StartingLbn, &SectorCountFromStartingLbn, &Index);
+    ok(Result == TRUE, "Expected TRUE, got FALSE\n");
+    ok(Lbn == 197128LL, "Expected Lbn 197128, got: %I64d\n", Lbn);
+    ok(SectorCountFromLbn == 1LL, "Expected SectorCountFromLbn 1, got: %I64d\n", SectorCountFromLbn);
+    ok(StartingLbn == 197128LL, "Expected StartingLbn 197128, got: %I64d\n", StartingLbn);
+    ok(SectorCountFromStartingLbn == 1LL, "Expected SectorCountFromStartingLbn 1, got: %I64d\n", SectorCountFromStartingLbn);
+    ok(Index == 1, "Expected Index 1, got: %d\n", Index);
+
+    Result = FsRtlLookupLargeMcbEntry(&FirstMcb, 33, &Lbn, &SectorCountFromLbn, NULL, NULL, NULL);
+    ok(Result == FALSE, "Expected FALSE, got TRUE\n");
+
+    Result = FsRtlAddLargeMcbEntry(&FirstMcb, 33, 1185, 32);
+    ok(Result == TRUE, "Expected TRUE, got FALSE\n");
+
+    DumpAllRuns(&FirstMcb);
+
+    NbRuns = FsRtlNumberOfRunsInLargeMcb(&FirstMcb);
+    ok(NbRuns == 5, "Expected 5 runs, got: %lu\n", NbRuns);
+
+    Result = FsRtlLookupLargeMcbEntry(&FirstMcb, 33, &Lbn, &SectorCountFromLbn, &StartingLbn, &SectorCountFromStartingLbn, &Index);
+    ok(Result == TRUE, "Expected TRUE, got FALSE\n");
+    ok(Lbn == 1185LL, "Expected Lbn 1185, got: %I64d\n", Lbn);
+    ok(SectorCountFromLbn == 32LL, "Expected SectorCountFromLbn 32, got: %I64d\n", SectorCountFromLbn);
+    ok(StartingLbn == 1185LL, "Expected StartingLbn 1185, got: %I64d\n", StartingLbn);
+    ok(SectorCountFromStartingLbn == 32LL, "Expected SectorCountFromStartingLbn 32, got: %I64d\n", SectorCountFromStartingLbn);
+    ok(Index == 4, "Expected Index 4, got: %d\n", Index);
+
+    Result = FsRtlGetNextLargeMcbEntry(&FirstMcb, 0, &Vbn, &Lbn, &SectorCount);
+    ok(Result == TRUE, "Expected TRUE, got FALSE\n");
+    ok(Vbn == 0LL, "Expected Vbn 0, got: %I64d\n", Vbn);
+    ok(Lbn == -1LL, "Expected Lbn -1, got: %I64d\n", Lbn);
+    ok(SectorCount == 1LL, "Expected SectorCount 1, got: %I64d\n", SectorCount);
+
+    Result = FsRtlGetNextLargeMcbEntry(&FirstMcb, 1, &Vbn, &Lbn, &SectorCount);
+    ok(Result == TRUE, "Expected TRUE, got FALSE\n");
+    ok(Vbn == 1LL, "Expected Vbn 1, got: %I64d\n", Vbn);
+    ok(Lbn == 198657LL, "Expected Lbn 198657, got: %I64d\n", Lbn);
+    ok(SectorCount == 1LL, "Expected SectorCount 1, got: %I64d\n", SectorCount);
+
+    Result = FsRtlGetNextLargeMcbEntry(&FirstMcb, 2, &Vbn, &Lbn, &SectorCount);
+    ok(Result == TRUE, "Expected TRUE, got FALSE\n");
+    ok(Vbn == 2LL, "Expected Vbn 2, got: %I64d\n", Vbn);
+    ok(Lbn == 199169LL, "Expected Lbn 199169, got: %I64d\n", Lbn);
+    ok(SectorCount == 15LL, "Expected SectorCount 15, got: %I64d\n", SectorCount);
+
+    Result = FsRtlGetNextLargeMcbEntry(&FirstMcb, 3, &Vbn, &Lbn, &SectorCount);
+    ok(Result == TRUE, "Expected TRUE, got FALSE\n");
+    ok(Vbn == 17LL, "Expected Vbn 17, got: %I64d\n", Vbn);
+    ok(Lbn == 1105LL, "Expected Lbn 1105, got: %I64d\n", Lbn);
+    ok(SectorCount == 16LL, "Expected SectorCount 16, got: %I64d\n", SectorCount);
+
+    Result = FsRtlGetNextLargeMcbEntry(&FirstMcb, 4, &Vbn, &Lbn, &SectorCount);
+    ok(Result == TRUE, "Expected TRUE, got FALSE\n");
+    ok(Vbn == 33LL, "Expected Vbn 33, got: %I64d\n", Vbn);
+    ok(Lbn == 1185LL, "Expected Lbn 1185, got: %I64d\n", Lbn);
+    ok(SectorCount == 32LL, "Expected SectorCount 32, got: %I64d\n", SectorCount);
+
+    Result = FsRtlGetNextLargeMcbEntry(&FirstMcb, 5, &Vbn, &Lbn, &SectorCount);
+    ok(Result == FALSE, "Expected FALSE, got TRUE\n");
+
+    Result = FsRtlAddLargeMcbEntry(&SecondMcb, 197128, 197128, 1);
+    ok(Result == TRUE, "Expected TRUE, got FALSE\n");
+
+    Result = FsRtlLookupLargeMcbEntry(&SecondMcb, 197128, &Lbn, &SectorCountFromLbn, &StartingLbn, &SectorCountFromStartingLbn, &Index);
+    ok(Result == TRUE, "Expected TRUE, got FALSE\n");
+    ok(Lbn == 197128LL, "Expected Lbn 197128, got: %I64d\n", Lbn);
+    ok(SectorCountFromLbn == 1LL, "Expected SectorCountFromLbn 1, got: %I64d\n", SectorCountFromLbn);
+    ok(StartingLbn == 197128LL, "Expected StartingLbn 197128, got: %I64d\n", StartingLbn);
+    ok(SectorCountFromStartingLbn == 1LL, "Expected SectorCountFromStartingLbn 1, got: %I64d\n", SectorCountFromStartingLbn);
+    ok(Index == 1, "Expected Index 1, got: %d\n", Index);
+
+    Result = FsRtlLookupLargeMcbEntry(&FirstMcb, 65, &Lbn, &SectorCountFromLbn, NULL, NULL, NULL);
+    ok(Result == FALSE, "Expected FALSE, got TRUE\n");
+
+    Result = FsRtlAddLargeMcbEntry(&FirstMcb, 65, 1249, 44);
+    ok(Result == TRUE, "Expected TRUE, got FALSE\n");
+
+    DumpAllRuns(&FirstMcb);
+
+    NbRuns = FsRtlNumberOfRunsInLargeMcb(&FirstMcb);
+    ok(NbRuns == 6, "Expected 6 runs, got: %lu\n", NbRuns);
+
+    Result = FsRtlLookupLargeMcbEntry(&FirstMcb, 65, &Lbn, &SectorCountFromLbn, &StartingLbn, &SectorCountFromStartingLbn, &Index);
+    ok(Result == TRUE, "Expected TRUE, got FALSE\n");
+    ok(Lbn == 1249LL, "Expected Lbn 1249, got: %I64d\n", Lbn);
+    ok(SectorCountFromLbn == 44LL, "Expected SectorCountFromLbn 44, got: %I64d\n", SectorCountFromLbn);
+    ok(StartingLbn == 1249LL, "Expected StartingLbn 1249, got: %I64d\n", StartingLbn);
+    ok(SectorCountFromStartingLbn == 44LL, "Expected SectorCountFromStartingLbn 44, got: %I64d\n", SectorCountFromStartingLbn);
+    ok(Index == 5, "Expected Index 1, got: %d\n", Index);
+
+    Result = FsRtlGetNextLargeMcbEntry(&FirstMcb, 0, &Vbn, &Lbn, &SectorCount);
+    ok(Result == TRUE, "Expected TRUE, got FALSE\n");
+    ok(Vbn == 0LL, "Expected Vbn 0, got: %I64d\n", Vbn);
+    ok(Lbn == -1LL, "Expected Lbn -1, got: %I64d\n", Lbn);
+    ok(SectorCount == 1LL, "Expected SectorCount 1, got: %I64d\n", SectorCount);
+
+    Result = FsRtlGetNextLargeMcbEntry(&FirstMcb, 1, &Vbn, &Lbn, &SectorCount);
+    ok(Result == TRUE, "Expected TRUE, got FALSE\n");
+    ok(Vbn == 1LL, "Expected Vbn 1, got: %I64d\n", Vbn);
+    ok(Lbn == 198657LL, "Expected Lbn 198657, got: %I64d\n", Lbn);
+    ok(SectorCount == 1LL, "Expected SectorCount 1, got: %I64d\n", SectorCount);
+
+    Result = FsRtlGetNextLargeMcbEntry(&FirstMcb, 2, &Vbn, &Lbn, &SectorCount);
+    ok(Result == TRUE, "Expected TRUE, got FALSE\n");
+    ok(Vbn == 2LL, "Expected Vbn 2, got: %I64d\n", Vbn);
+    ok(Lbn == 199169LL, "Expected Lbn 199169, got: %I64d\n", Lbn);
+    ok(SectorCount == 15LL, "Expected SectorCount 15, got: %I64d\n", SectorCount);
+
+    Result = FsRtlGetNextLargeMcbEntry(&FirstMcb, 3, &Vbn, &Lbn, &SectorCount);
+    ok(Result == TRUE, "Expected TRUE, got FALSE\n");
+    ok(Vbn == 17LL, "Expected Vbn 17, got: %I64d\n", Vbn);
+    ok(Lbn == 1105LL, "Expected Lbn 1105, got: %I64d\n", Lbn);
+    ok(SectorCount == 16LL, "Expected SectorCount 16, got: %I64d\n", SectorCount);
+
+    Result = FsRtlGetNextLargeMcbEntry(&FirstMcb, 4, &Vbn, &Lbn, &SectorCount);
+    ok(Result == TRUE, "Expected TRUE, got FALSE\n");
+    ok(Vbn == 33LL, "Expected Vbn 33, got: %I64d\n", Vbn);
+    ok(Lbn == 1185LL, "Expected Lbn 1185, got: %I64d\n", Lbn);
+    ok(SectorCount == 32LL, "Expected SectorCount 32, got: %I64d\n", SectorCount);
+
+    Result = FsRtlGetNextLargeMcbEntry(&FirstMcb, 5, &Vbn, &Lbn, &SectorCount);
+    ok(Result == TRUE, "Expected TRUE, got FALSE\n");
+    ok(Vbn == 65LL, "Expected Vbn 65, got: %I64d\n", Vbn);
+    ok(Lbn == 1249LL, "Expected Lbn 1249, got: %I64d\n", Lbn);
+    ok(SectorCount == 44LL, "Expected SectorCount 44, got: %I64d\n", SectorCount);
+
+    Result = FsRtlGetNextLargeMcbEntry(&FirstMcb, 6, &Vbn, &Lbn, &SectorCount);
+    ok(Result == FALSE, "Expected FALSE, got TRUE\n");
+
+    Result = FsRtlLookupLargeMcbEntry(&FirstMcb, 1, &Lbn, &SectorCountFromLbn, NULL, NULL, NULL);
+    ok(Result == TRUE, "Expected TRUE, got FALSE\n");
+    ok(Lbn == 198657LL, "Expected Lbn 198657, got: %I64d\n", Lbn);
+    ok(SectorCountFromLbn == 1LL, "Expected SectorCountFromLbn 108, got: %I64d\n", SectorCountFromLbn);
+
+    FsRtlUninitializeLargeMcb(&SecondMcb);
+    FsRtlUninitializeLargeMcb(&FirstMcb);
+}
+
 START_TEST(FsRtlMcb)
 {
     FsRtlMcbTest();
     FsRtlLargeMcbTest();
+    FsRtlLargeMcbTestsExt2();
 }