* PROJECT: ReactOS Kernel
* LICENSE: GPL - See COPYING in the top level directory
* FILE: ntoskrnl/fsrtl/largemcb.c
- * PURPOSE: Mapping Control Block (MCB) support for File System Drivers
+ * PURPOSE: Large Mapped Control Block (MCB) support for File System Drivers
* PROGRAMMERS: Alex Ionescu (alex.ionescu@reactos.org)
+ * Pierre Schweitzer (heis_spiter@hotmail.com)
+ * Art Yerkes (art.yerkes@gmail.com)
*/
/* INCLUDES ******************************************************************/
#define NDEBUG
#include <debug.h>
+/* GLOBALS *******************************************************************/
+
+#define GET_LIST_HEAD(x) ((PLIST_ENTRY)(&((PRTL_GENERIC_TABLE)x)[1]))
+
+PAGED_LOOKASIDE_LIST FsRtlFirstMappingLookasideList;
+NPAGED_LOOKASIDE_LIST FsRtlFastMutexLookasideList;
+
+typedef struct _LARGE_MCB_MAPPING_ENTRY
+{
+ LARGE_INTEGER RunStartVbn;
+ LARGE_INTEGER SectorCount;
+ LARGE_INTEGER StartingLbn;
+ LIST_ENTRY Sequence;
+} LARGE_MCB_MAPPING_ENTRY, *PLARGE_MCB_MAPPING_ENTRY;
+
+static VOID McbPrintTree(PBASE_MCB Mcb)
+{
+ PLARGE_MCB_MAPPING_ENTRY Entry;
+ for (Entry = (PLARGE_MCB_MAPPING_ENTRY)
+ RtlEnumerateGenericTable(Mcb->Mapping, TRUE);
+ Entry;
+ Entry = (PLARGE_MCB_MAPPING_ENTRY)
+ RtlEnumerateGenericTable(Mcb->Mapping, FALSE))
+ {
+ DPRINT1
+ ("Vbn %x Lbn %x Count %x\n",
+ Entry->RunStartVbn.LowPart,
+ Entry->StartingLbn.LowPart,
+ Entry->SectorCount.LowPart);
+ }
+}
+
+static PVOID NTAPI McbMappingAllocate(PRTL_GENERIC_TABLE Table, CLONG Bytes)
+{
+ PVOID Result;
+ PBASE_MCB Mcb = (PBASE_MCB)Table->TableContext;
+ Result = ExAllocatePoolWithTag(Mcb->PoolType, Bytes, 'LMCB');
+ DPRINT("McbMappingAllocate(%d) => %p\n", Bytes, Result);
+ return Result;
+}
+
+static VOID NTAPI McbMappingFree(PRTL_GENERIC_TABLE Table, PVOID Buffer)
+{
+ DPRINT("McbMappingFree(%p)\n", Buffer);
+ ExFreePoolWithTag(Buffer, 'LMCB');
+}
+
+static RTL_GENERIC_COMPARE_RESULTS NTAPI McbMappingCompare
+(PRTL_GENERIC_TABLE Table, PVOID PtrA, PVOID PtrB)
+{
+ PLARGE_MCB_MAPPING_ENTRY A = PtrA, B = PtrB;
+ RTL_GENERIC_COMPARE_RESULTS Result;
+ DPRINT("Starting to compare element %x to element %x\n", PtrA, PtrB);
+ Result =
+ (A->RunStartVbn.QuadPart + A->SectorCount.QuadPart <=
+ B->RunStartVbn.QuadPart) ? GenericLessThan :
+ (A->RunStartVbn.QuadPart >=
+ B->RunStartVbn.QuadPart + B->SectorCount.QuadPart) ?
+ GenericGreaterThan : GenericEqual;
+ DPRINT("Compare(%x:%x): %x:%x to %x:%x => %d\n",
+ A,B,
+ A->RunStartVbn.LowPart, A->SectorCount.LowPart,
+ B->RunStartVbn.LowPart, B->SectorCount.LowPart,
+ Result);
+ return Result;
+}
+
/* PUBLIC FUNCTIONS **********************************************************/
/*
- * @unimplemented
+ * @implemented
+ */
+BOOLEAN
+NTAPI
+FsRtlAddBaseMcbEntry(IN PBASE_MCB Mcb,
+ IN LONGLONG Vbn,
+ IN LONGLONG Lbn,
+ IN LONGLONG SectorCount)
+{
+ LARGE_MCB_MAPPING_ENTRY Node;
+ PLARGE_MCB_MAPPING_ENTRY Existing = NULL;
+ BOOLEAN NewElement = FALSE;
+
+ McbPrintTree(Mcb);
+
+ Node.RunStartVbn.QuadPart = Vbn;
+ Node.StartingLbn.QuadPart = Lbn;
+ Node.SectorCount.QuadPart = SectorCount;
+
+ DPRINT("RunStartVbn %x\n", Node.RunStartVbn.LowPart);
+ DPRINT("StartingLbn %x\n", Node.StartingLbn.LowPart);
+ DPRINT("SectorCount %x\n", Node.SectorCount.LowPart);
+
+ while (!NewElement)
+ {
+ DPRINT("Inserting %x:%x\n", Node.RunStartVbn.LowPart, Node.SectorCount.LowPart);
+ Existing = RtlInsertElementGenericTable
+ (Mcb->Mapping, &Node, sizeof(Node), &NewElement);
+ DPRINT("Existing %x\n", Existing);
+ if (!Existing) break;
+
+ DPRINT("NewElement %d\n", NewElement);
+ if (!NewElement)
+ {
+ // We merge the existing runs
+ LARGE_INTEGER StartVbn, FinalVbn;
+ DPRINT("Existing: %x:%x\n",
+ Existing->RunStartVbn.LowPart, Node.SectorCount.LowPart);
+ if (Existing->RunStartVbn.QuadPart < Node.RunStartVbn.QuadPart)
+ {
+ StartVbn = Existing->RunStartVbn;
+ Node.StartingLbn = Existing->StartingLbn;
+ }
+ else
+ {
+ StartVbn = Node.RunStartVbn;
+ }
+ DPRINT("StartVbn %x\n", StartVbn.LowPart);
+ if (Existing->RunStartVbn.QuadPart + Existing->SectorCount.QuadPart >
+ Node.RunStartVbn.QuadPart + Node.SectorCount.QuadPart)
+ {
+ FinalVbn.QuadPart =
+ Existing->RunStartVbn.QuadPart + Existing->SectorCount.QuadPart;
+ }
+ else
+ {
+ FinalVbn.QuadPart =
+ Node.RunStartVbn.QuadPart + Node.SectorCount.QuadPart;
+ }
+ DPRINT("FinalVbn %x\n", FinalVbn.LowPart);
+ Node.RunStartVbn.QuadPart = StartVbn.QuadPart;
+ Node.SectorCount.QuadPart = FinalVbn.QuadPart - StartVbn.QuadPart;
+ RemoveHeadList(&Existing->Sequence);
+ RtlDeleteElementGenericTable(Mcb->Mapping, Existing);
+ Mcb->PairCount--;
+ }
+ else
+ {
+ DPRINT("Mapping added %x\n", Existing);
+ Mcb->MaximumPairCount++;
+ Mcb->PairCount++;
+ InsertHeadList(GET_LIST_HEAD(Mcb->Mapping), &Existing->Sequence);
+ }
+ }
+
+ DPRINT("!!Existing %d\n", !!Existing);
+ McbPrintTree(Mcb);
+ return !!Existing;
+}
+
+/*
+ * @implemented
*/
BOOLEAN
NTAPI
IN LONGLONG Lbn,
IN LONGLONG SectorCount)
{
- KeBugCheck(FILE_SYSTEM);
- return FALSE;
+ BOOLEAN Result;
+
+ DPRINT
+ ("Mcb %x Vbn %x Lbn %x SectorCount %x\n",
+ Mcb, (ULONG)Vbn, (ULONG)Lbn, (ULONG)SectorCount);
+
+ KeAcquireGuardedMutex(Mcb->GuardedMutex);
+ Result = FsRtlAddBaseMcbEntry(&(Mcb->BaseMcb),
+ Vbn,
+ Lbn,
+ SectorCount);
+ KeReleaseGuardedMutex(Mcb->GuardedMutex);
+
+ DPRINT("Done %d\n", Result);
+
+ return Result;
}
/*
- * @implemented
+ * @unimplemented
*/
BOOLEAN
NTAPI
-FsRtlAddMcbEntry(IN PMCB Mcb,
- IN VBN Vbn,
- IN LBN Lbn,
- IN ULONG SectorCount)
+FsRtlGetNextBaseMcbEntry(IN PBASE_MCB Mcb,
+ IN ULONG RunIndex,
+ OUT PLONGLONG Vbn,
+ OUT PLONGLONG Lbn,
+ OUT PLONGLONG SectorCount)
{
- /* Call the newer function */
- return FsRtlAddLargeMcbEntry(&Mcb->
- DummyFieldThatSizesThisStructureCorrectly,
- (LONGLONG)Vbn,
- (LONGLONG)Lbn,
- (LONGLONG)SectorCount);
+ ULONG i = 0;
+ BOOLEAN Result = FALSE;
+ PLARGE_MCB_MAPPING_ENTRY Entry;
+ for (Entry = (PLARGE_MCB_MAPPING_ENTRY)
+ RtlEnumerateGenericTable(Mcb->Mapping, TRUE);
+ Entry && i < RunIndex;
+ Entry = (PLARGE_MCB_MAPPING_ENTRY)
+ RtlEnumerateGenericTable(Mcb->Mapping, FALSE), i++);
+ if (Entry)
+ {
+ Result = TRUE;
+ if (Vbn)
+ *Vbn = Entry->RunStartVbn.QuadPart;
+ if (Lbn)
+ *Lbn = Entry->StartingLbn.QuadPart;
+ if (SectorCount)
+ *SectorCount = Entry->SectorCount.QuadPart;
+ }
+
+ return Result;
}
/*
- * @unimplemented
+ * @implemented
*/
BOOLEAN
NTAPI
OUT PLONGLONG Lbn,
OUT PLONGLONG SectorCount)
{
- KeBugCheck(FILE_SYSTEM);
- *Vbn = 0;
- *Lbn = 0;
- *SectorCount= 0;
- return FALSE;
+ BOOLEAN Result;
+
+ DPRINT("FsRtlGetNextLargeMcbEntry Mcb %x RunIndex %x\n", Mcb, RunIndex);
+
+ KeAcquireGuardedMutex(Mcb->GuardedMutex);
+ Result = FsRtlGetNextBaseMcbEntry(&(Mcb->BaseMcb),
+ RunIndex,
+ Vbn,
+ Lbn,
+ SectorCount);
+ KeReleaseGuardedMutex(Mcb->GuardedMutex);
+
+ DPRINT("Done %d\n", Result);
+
+ return Result;
}
/*
* @implemented
*/
-BOOLEAN
+VOID
NTAPI
-FsRtlGetNextMcbEntry(IN PMCB Mcb,
- IN ULONG RunIndex,
- OUT PVBN Vbn,
- OUT PLBN Lbn,
- OUT PULONG SectorCount)
+FsRtlInitializeBaseMcb(IN PBASE_MCB Mcb,
+ IN POOL_TYPE PoolType)
{
- BOOLEAN Return = FALSE;
- LONGLONG llVbn;
- LONGLONG llLbn;
- LONGLONG llSectorCount;
+ Mcb->PairCount = 0;
- /* Call the Large version */
- Return = FsRtlGetNextLargeMcbEntry(
- &Mcb->DummyFieldThatSizesThisStructureCorrectly,
- RunIndex,
- &llVbn,
- &llLbn,
- &llSectorCount);
+ if (PoolType == PagedPool)
+ {
+ Mcb->Mapping = ExAllocateFromPagedLookasideList(&FsRtlFirstMappingLookasideList);
+ DPRINT("Get from lookaside list\n");
+ }
+ else
+ {
+ Mcb->Mapping = ExAllocatePoolWithTag(PoolType | POOL_RAISE_IF_ALLOCATION_FAILURE,
+ sizeof(RTL_GENERIC_TABLE) + sizeof(LIST_ENTRY),
+ 'FSBC');
+ DPRINT("Allocate\n");
+ }
- /* Return the lower 32 bits */
- *Vbn = (ULONG)llVbn;
- *Lbn = (ULONG)llLbn;
- *SectorCount = (ULONG)llSectorCount;
-
- /* And return the original value */
- return Return;
+ DPRINT("Mcb->Mapping %x\n", Mcb->Mapping);
+ Mcb->PoolType = PoolType;
+ Mcb->MaximumPairCount = MAXIMUM_PAIR_COUNT;
+ RtlInitializeGenericTable
+ (Mcb->Mapping,
+ McbMappingCompare,
+ McbMappingAllocate,
+ McbMappingFree,
+ Mcb);
+ InitializeListHead(GET_LIST_HEAD(Mcb->Mapping));
}
/*
- * @unimplemented
+ * @implemented
*/
VOID
NTAPI
FsRtlInitializeLargeMcb(IN PLARGE_MCB Mcb,
IN POOL_TYPE PoolType)
{
- KeBugCheck(FILE_SYSTEM);
+ Mcb->GuardedMutex = ExAllocateFromNPagedLookasideList(&FsRtlFastMutexLookasideList);
+
+ KeInitializeGuardedMutex(Mcb->GuardedMutex);
+
+ _SEH2_TRY
+ {
+ FsRtlInitializeBaseMcb(&(Mcb->BaseMcb), PoolType);
+ }
+ _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
+ {
+ ExFreeToNPagedLookasideList(&FsRtlFastMutexLookasideList,
+ Mcb->GuardedMutex);
+ Mcb->GuardedMutex = NULL;
+ }
+ _SEH2_END;
}
/*
*/
VOID
NTAPI
-FsRtlInitializeMcb(IN PMCB Mcb,
- IN POOL_TYPE PoolType)
+FsRtlInitializeLargeMcbs(VOID)
{
- /* Call the newer function */
- FsRtlInitializeLargeMcb(&Mcb->DummyFieldThatSizesThisStructureCorrectly,
- PoolType);
+ /* Initialize the list for the MCB */
+ ExInitializePagedLookasideList(&FsRtlFirstMappingLookasideList,
+ NULL,
+ NULL,
+ POOL_RAISE_IF_ALLOCATION_FAILURE,
+ sizeof(RTL_GENERIC_TABLE) + sizeof(LIST_ENTRY),
+ IFS_POOL_TAG,
+ 0); /* FIXME: Should be 4 */
+
+ /* Initialize the list for the guarded mutex */
+ ExInitializeNPagedLookasideList(&FsRtlFastMutexLookasideList,
+ NULL,
+ NULL,
+ POOL_RAISE_IF_ALLOCATION_FAILURE,
+ sizeof(KGUARDED_MUTEX),
+ IFS_POOL_TAG,
+ 0); /* FIXME: Should be 32 */
}
/*
*/
BOOLEAN
NTAPI
+FsRtlLookupBaseMcbEntry(IN PBASE_MCB Mcb,
+ IN LONGLONG Vbn,
+ OUT PLONGLONG Lbn OPTIONAL,
+ OUT PLONGLONG SectorCountFromLbn OPTIONAL,
+ OUT PLONGLONG StartingLbn OPTIONAL,
+ OUT PLONGLONG SectorCountFromStartingLbn OPTIONAL,
+ OUT PULONG Index OPTIONAL)
+{
+ BOOLEAN Result = FALSE;
+ LARGE_MCB_MAPPING_ENTRY ToLookup;
+ PLARGE_MCB_MAPPING_ENTRY Entry;
+
+ ToLookup.RunStartVbn.QuadPart = Vbn;
+ ToLookup.SectorCount.QuadPart = 1;
+
+ Entry = RtlLookupElementGenericTable(Mcb->Mapping, &ToLookup);
+ if (!Entry)
+ {
+ // Find out if we have a following entry. The spec says we should return
+ // found with Lbn == -1 when we're beneath the largest map.
+ ToLookup.SectorCount.QuadPart = (1ull<<62) - ToLookup.RunStartVbn.QuadPart;
+ Entry = RtlLookupElementGenericTable(Mcb->Mapping, &ToLookup);
+ if (Entry)
+ {
+ Result = TRUE;
+ if (Lbn) *Lbn = ~0ull;
+ }
+ else
+ {
+ Result = FALSE;
+ }
+ }
+ else
+ {
+ LARGE_INTEGER Offset;
+ Offset.QuadPart = Vbn - Entry->RunStartVbn.QuadPart;
+ Result = TRUE;
+ if (Lbn) *Lbn = Entry->StartingLbn.QuadPart + Offset.QuadPart;
+ if (SectorCountFromLbn) *SectorCountFromLbn = Entry->SectorCount.QuadPart - Offset.QuadPart;
+ if (StartingLbn) *StartingLbn = Entry->StartingLbn.QuadPart;
+ if (SectorCountFromStartingLbn) *SectorCountFromStartingLbn = Entry->SectorCount.QuadPart;
+ }
+
+ return Result;
+}
+
+/*
+ * @implemented
+ */
+BOOLEAN
+NTAPI
FsRtlLookupLargeMcbEntry(IN PLARGE_MCB Mcb,
IN LONGLONG Vbn,
OUT PLONGLONG Lbn OPTIONAL,
OUT PLONGLONG SectorCountFromStartingLbn OPTIONAL,
OUT PULONG Index OPTIONAL)
{
- KeBugCheck(FILE_SYSTEM);
- *Lbn = 0;
- *SectorCountFromLbn = 0;
- return FALSE;
+ BOOLEAN Result;
+
+ DPRINT("FsRtlLookupLargeMcbEntry Mcb %x Vbn %x\n", Mcb, (ULONG)Vbn);
+
+ KeAcquireGuardedMutex(Mcb->GuardedMutex);
+ Result = FsRtlLookupBaseMcbEntry(&(Mcb->BaseMcb),
+ Vbn,
+ Lbn,
+ SectorCountFromLbn,
+ StartingLbn,
+ SectorCountFromStartingLbn,
+ Index);
+ KeReleaseGuardedMutex(Mcb->GuardedMutex);
+
+ DPRINT("Done %d (%x)\n", Result, Lbn ? (ULONG)*Lbn : 0);
+
+ return Result;
}
/*
*/
BOOLEAN
NTAPI
+FsRtlLookupLastBaseMcbEntryAndIndex(IN PBASE_MCB OpaqueMcb,
+ IN OUT PLONGLONG LargeVbn,
+ IN OUT PLONGLONG LargeLbn,
+ IN OUT PULONG Index)
+{
+ ULONG i = 0;
+ BOOLEAN Result = FALSE;
+ PLIST_ENTRY ListEntry;
+ PLARGE_MCB_MAPPING_ENTRY Entry;
+ PLARGE_MCB_MAPPING_ENTRY CountEntry;
+
+ ListEntry = GET_LIST_HEAD(OpaqueMcb->Mapping);
+ if (!IsListEmpty(ListEntry))
+ {
+ Entry = CONTAINING_RECORD(ListEntry->Flink, LARGE_MCB_MAPPING_ENTRY, Sequence);
+ Result = TRUE;
+ *LargeVbn = Entry->RunStartVbn.QuadPart;
+ *LargeLbn = Entry->StartingLbn.QuadPart;
+
+ for (i = 0, CountEntry = RtlEnumerateGenericTable(OpaqueMcb->Mapping, TRUE);
+ CountEntry != Entry;
+ CountEntry = RtlEnumerateGenericTable(OpaqueMcb->Mapping, FALSE));
+
+ *Index = i;
+ }
+
+ return Result;
+}
+
+/*
+ * @implemented
+ */
+BOOLEAN
+NTAPI
FsRtlLookupLastLargeMcbEntryAndIndex(IN PLARGE_MCB OpaqueMcb,
OUT PLONGLONG LargeVbn,
OUT PLONGLONG LargeLbn,
OUT PULONG Index)
{
- KeBugCheck(FILE_SYSTEM);
- *LargeVbn = 0;
- *LargeLbn = 0;
- *Index = 0;
- return FALSE;
+ BOOLEAN Result;
+
+ DPRINT("FsRtlLookupLastLargeMcbEntryAndIndex %x\n", OpaqueMcb);
+
+ KeAcquireGuardedMutex(OpaqueMcb->GuardedMutex);
+ Result = FsRtlLookupLastBaseMcbEntryAndIndex(&(OpaqueMcb->BaseMcb),
+ LargeVbn,
+ LargeLbn,
+ Index);
+ KeReleaseGuardedMutex(OpaqueMcb->GuardedMutex);
+
+ DPRINT("Done %d\n", Result);
+
+ return Result;
}
/*
*/
BOOLEAN
NTAPI
-FsRtlLookupLastLargeMcbEntry(IN PLARGE_MCB Mcb,
- OUT PLONGLONG Vbn,
- OUT PLONGLONG Lbn)
+FsRtlLookupLastBaseMcbEntry(IN PBASE_MCB Mcb,
+ OUT PLONGLONG Vbn,
+ OUT PLONGLONG Lbn)
{
- KeBugCheck(FILE_SYSTEM);
- return(FALSE);
+ BOOLEAN Result = FALSE;
+ PLIST_ENTRY ListEntry;
+ PLARGE_MCB_MAPPING_ENTRY Entry;
+
+ ListEntry = GET_LIST_HEAD(Mcb->Mapping);
+ if (!IsListEmpty(ListEntry))
+ {
+ Entry = CONTAINING_RECORD(ListEntry->Flink, LARGE_MCB_MAPPING_ENTRY, Sequence);
+ Result = TRUE;
+ *Vbn = Entry->RunStartVbn.QuadPart;
+ *Lbn = Entry->StartingLbn.QuadPart;
+ }
+
+ return Result;
}
/*
*/
BOOLEAN
NTAPI
-FsRtlLookupLastMcbEntry(IN PMCB Mcb,
- OUT PVBN Vbn,
- OUT PLBN Lbn)
+FsRtlLookupLastLargeMcbEntry(IN PLARGE_MCB Mcb,
+ OUT PLONGLONG Vbn,
+ OUT PLONGLONG Lbn)
{
- BOOLEAN Return = FALSE;
- LONGLONG llVbn = 0;
- LONGLONG llLbn = 0;
+ BOOLEAN Result;
- /* Call the Large version */
- Return = FsRtlLookupLastLargeMcbEntry(
- &Mcb->DummyFieldThatSizesThisStructureCorrectly,
- &llVbn,
- &llLbn);
+ DPRINT("FsRtlLookupLastLargeMcbEntry Mcb %x\n", Mcb);
- /* Return the lower 32-bits */
- *Vbn = (ULONG)llVbn;
- *Lbn = (ULONG)llLbn;
+ KeAcquireGuardedMutex(Mcb->GuardedMutex);
+ Result = FsRtlLookupLastBaseMcbEntry(&(Mcb->BaseMcb),
+ Vbn,
+ Lbn);
+ KeReleaseGuardedMutex(Mcb->GuardedMutex);
- /* And return the original value */
- return Return;
+ DPRINT("Done %d\n", Result);
+
+ return Result;
}
/*
* @implemented
*/
-BOOLEAN
+ULONG
NTAPI
-FsRtlLookupMcbEntry(IN PMCB Mcb,
- IN VBN Vbn,
- OUT PLBN Lbn,
- OUT PULONG SectorCount OPTIONAL,
- OUT PULONG Index)
+FsRtlNumberOfRunsInBaseMcb(IN PBASE_MCB Mcb)
{
- BOOLEAN Return = FALSE;
- LONGLONG llLbn;
- LONGLONG llSectorCount;
-
- /* Call the Large version */
- Return = FsRtlLookupLargeMcbEntry(&Mcb->
- DummyFieldThatSizesThisStructureCorrectly,
- (LONGLONG)Vbn,
- &llLbn,
- &llSectorCount,
- NULL,
- NULL,
- Index);
-
- /* Return the lower 32-bits */
- *Lbn = (ULONG)llLbn;
- if (SectorCount) *SectorCount = (ULONG)llSectorCount;
-
- /* And return the original value */
- return Return;
+ /* Return the count */
+ return Mcb->PairCount;
}
/*
{
ULONG NumberOfRuns;
+ DPRINT("FsRtlNumberOfRunsInLargeMcb Mcb %x\n", Mcb);
+
/* Read the number of runs while holding the MCB lock */
KeAcquireGuardedMutex(Mcb->GuardedMutex);
NumberOfRuns = Mcb->BaseMcb.PairCount;
KeReleaseGuardedMutex(Mcb->GuardedMutex);
+ DPRINT("Done %d\n", NumberOfRuns);
+
/* Return the count */
return NumberOfRuns;
}
/*
- * @implemented
+ * @unimplemented
*/
-ULONG
+VOID
NTAPI
-FsRtlNumberOfRunsInMcb (IN PMCB Mcb)
+FsRtlRemoveBaseMcbEntry(IN PBASE_MCB Mcb,
+ IN LONGLONG Vbn,
+ IN LONGLONG SectorCount)
{
- /* Call the newer function */
- return FsRtlNumberOfRunsInLargeMcb(
- &Mcb->DummyFieldThatSizesThisStructureCorrectly);
+ LARGE_MCB_MAPPING_ENTRY Node;
+ PLARGE_MCB_MAPPING_ENTRY Element;
+
+ Node.RunStartVbn.QuadPart = Vbn;
+ Node.SectorCount.QuadPart = SectorCount;
+
+ while ((Element = RtlLookupElementGenericTable(Mcb->Mapping, &Node)))
+ {
+ // Must split
+ if (Element->RunStartVbn.QuadPart < Node.RunStartVbn.QuadPart &&
+ Element->SectorCount.QuadPart > Node.SectorCount.QuadPart)
+ {
+ LARGE_MCB_MAPPING_ENTRY Upper, Reinsert;
+ PLARGE_MCB_MAPPING_ENTRY Reinserted, Inserted;
+ LARGE_INTEGER StartHole = Node.RunStartVbn;
+ LARGE_INTEGER EndHole;
+ EndHole.QuadPart = Node.RunStartVbn.QuadPart + Node.SectorCount.QuadPart;
+ Upper.RunStartVbn.QuadPart = EndHole.QuadPart;
+ Upper.StartingLbn.QuadPart =
+ Element->StartingLbn.QuadPart +
+ EndHole.QuadPart -
+ Element->RunStartVbn.QuadPart;
+ Upper.SectorCount.QuadPart =
+ Element->SectorCount.QuadPart -
+ (EndHole.QuadPart - Element->RunStartVbn.QuadPart);
+ Reinsert = *Element;
+ Reinsert.SectorCount.QuadPart =
+ Element->RunStartVbn.QuadPart - StartHole.QuadPart;
+ RemoveEntryList(&Element->Sequence);
+ RtlDeleteElementGenericTable(Mcb->Mapping, Element);
+ Mcb->PairCount--;
+
+ Reinserted = RtlInsertElementGenericTable
+ (Mcb->Mapping, &Reinsert, sizeof(Reinsert), NULL);
+ InsertHeadList(GET_LIST_HEAD(Mcb->Mapping), &Reinserted->Sequence);
+ Mcb->PairCount++;
+
+ Inserted = RtlInsertElementGenericTable
+ (Mcb->Mapping, &Upper, sizeof(Upper), NULL);
+ InsertHeadList(GET_LIST_HEAD(Mcb->Mapping), &Inserted->Sequence);
+ Mcb->PairCount++;
+ }
+ else if (Element->RunStartVbn.QuadPart < Node.RunStartVbn.QuadPart)
+ {
+ LARGE_MCB_MAPPING_ENTRY NewElement;
+ PLARGE_MCB_MAPPING_ENTRY Reinserted;
+ LARGE_INTEGER StartHole = Node.RunStartVbn;
+ NewElement.RunStartVbn = Element->RunStartVbn;
+ NewElement.StartingLbn = Element->StartingLbn;
+ NewElement.SectorCount.QuadPart = StartHole.QuadPart - Element->StartingLbn.QuadPart;
+
+ RemoveEntryList(&Element->Sequence);
+ RtlDeleteElementGenericTable(Mcb->Mapping, Element);
+ Mcb->PairCount--;
+
+ Reinserted = RtlInsertElementGenericTable
+ (Mcb->Mapping, &NewElement, sizeof(NewElement), NULL);
+ InsertHeadList(GET_LIST_HEAD(Mcb->Mapping), &Reinserted->Sequence);
+ Mcb->PairCount++;
+ }
+ else
+ {
+ LARGE_MCB_MAPPING_ENTRY NewElement;
+ PLARGE_MCB_MAPPING_ENTRY Reinserted;
+ LARGE_INTEGER EndHole = Element->RunStartVbn;
+ LARGE_INTEGER EndRun;
+ EndRun.QuadPart = Element->RunStartVbn.QuadPart + Element->SectorCount.QuadPart;
+ NewElement.RunStartVbn = EndHole;
+ NewElement.StartingLbn.QuadPart = Element->StartingLbn.QuadPart +
+ (EndHole.QuadPart - Element->RunStartVbn.QuadPart);
+ NewElement.SectorCount.QuadPart = EndRun.QuadPart - EndHole.QuadPart;
+
+ RemoveEntryList(&Element->Sequence);
+ RtlDeleteElementGenericTable(Mcb->Mapping, Element);
+ Mcb->PairCount--;
+
+ Reinserted = RtlInsertElementGenericTable
+ (Mcb->Mapping, &NewElement, sizeof(NewElement), NULL);
+ InsertHeadList(GET_LIST_HEAD(Mcb->Mapping), &Reinserted->Sequence);
+ Mcb->PairCount++;
+ }
+ }
}
/*
- * @unimplemented
+ * @implemented
*/
VOID
NTAPI
IN LONGLONG Vbn,
IN LONGLONG SectorCount)
{
- KeBugCheck(FILE_SYSTEM);
+ DPRINT("FsRtlRemoveLargeMcbEntry Mcb %x, Vbn %x, SectorCount %x\n", Mcb, (ULONG)Vbn, (ULONG)SectorCount);
+
+ KeAcquireGuardedMutex(Mcb->GuardedMutex);
+ FsRtlRemoveBaseMcbEntry(&(Mcb->BaseMcb),
+ Vbn,
+ SectorCount);
+ KeReleaseGuardedMutex(Mcb->GuardedMutex);
+
+ DPRINT("Done\n");
}
/*
*/
VOID
NTAPI
-FsRtlRemoveMcbEntry(IN PMCB Mcb,
- IN VBN Vbn,
- IN ULONG SectorCount)
+FsRtlResetBaseMcb(IN PBASE_MCB Mcb)
{
- /* Call the large function */
- FsRtlRemoveLargeMcbEntry(&Mcb->DummyFieldThatSizesThisStructureCorrectly,
- (LONGLONG)Vbn,
- (LONGLONG)SectorCount);
+ PLARGE_MCB_MAPPING_ENTRY Element;
+
+ DPRINT("Reset MCB %x\n", Mcb);
+ while (RtlNumberGenericTableElements(Mcb->Mapping) &&
+ (Element = (PLARGE_MCB_MAPPING_ENTRY)RtlGetElementGenericTable(Mcb->Mapping, 0)))
+ {
+ DPRINT("Deleting %x\n", Element);
+ RtlDeleteElementGenericTable(Mcb->Mapping, Element);
+ }
+
+ Mcb->PairCount = 0;
+ Mcb->MaximumPairCount = 0;
+ DPRINT("Done\n");
}
/*
- * @unimplemented
+ * @implemented
*/
VOID
NTAPI
FsRtlResetLargeMcb(IN PLARGE_MCB Mcb,
IN BOOLEAN SelfSynchronized)
{
- KeBugCheck(FILE_SYSTEM);
+ if (!SelfSynchronized)
+ {
+ KeAcquireGuardedMutex(Mcb->GuardedMutex);
+ }
+
+ FsRtlResetBaseMcb(&Mcb->BaseMcb);
+
+
+ if (!SelfSynchronized)
+ {
+ KeReleaseGuardedMutex(Mcb->GuardedMutex);
+ }
+}
+
+#define MCB_BUMP_NO_MORE 0
+#define MCB_BUMP_AGAIN 1
+
+static ULONG NTAPI McbBump(PBASE_MCB Mcb, PLARGE_MCB_MAPPING_ENTRY FixedPart)
+{
+ LARGE_MCB_MAPPING_ENTRY Reimagined;
+ PLARGE_MCB_MAPPING_ENTRY Found = NULL;
+
+ DPRINT("McbBump %x (%x:%x)\n", Mcb, FixedPart->RunStartVbn.LowPart, FixedPart->SectorCount.LowPart);
+
+ Reimagined = *FixedPart;
+ while ((Found = RtlLookupElementGenericTable(Mcb->Mapping, &Reimagined)))
+ {
+ Reimagined = *Found;
+ Reimagined.RunStartVbn.QuadPart =
+ FixedPart->RunStartVbn.QuadPart + FixedPart->SectorCount.QuadPart;
+ DPRINT("Reimagined %x\n", Reimagined.RunStartVbn.LowPart);
+ }
+
+ DPRINT("Found %x\n", Found);
+ if (!Found) return MCB_BUMP_NO_MORE;
+ DPRINT1
+ ("Moving %x-%x to %x because %x-%x overlaps\n",
+ Found->RunStartVbn.LowPart,
+ Found->RunStartVbn.LowPart + Found->SectorCount.QuadPart,
+ Reimagined.RunStartVbn.LowPart + Reimagined.SectorCount.LowPart,
+ Reimagined.RunStartVbn.LowPart,
+ Reimagined.RunStartVbn.LowPart + Reimagined.SectorCount.LowPart);
+ Found->RunStartVbn.QuadPart = Reimagined.RunStartVbn.QuadPart + Reimagined.SectorCount.QuadPart;
+ Found->StartingLbn.QuadPart = Reimagined.StartingLbn.QuadPart + Reimagined.SectorCount.QuadPart;
+
+ DPRINT("Again\n");
+ return MCB_BUMP_AGAIN;
}
/*
*/
BOOLEAN
NTAPI
+FsRtlSplitBaseMcb(IN PBASE_MCB Mcb,
+ IN LONGLONG Vbn,
+ IN LONGLONG Amount)
+{
+ ULONG Result;
+ LARGE_MCB_MAPPING_ENTRY Node;
+ PLARGE_MCB_MAPPING_ENTRY Existing = NULL;
+
+ Node.RunStartVbn.QuadPart = Vbn;
+ Node.SectorCount.QuadPart = 0;
+
+ Existing = RtlLookupElementGenericTable(Mcb->Mapping, &Node);
+
+ if (Existing)
+ {
+ // We're in the middle of a run
+ LARGE_MCB_MAPPING_ENTRY UpperPart;
+ LARGE_MCB_MAPPING_ENTRY LowerPart;
+ PLARGE_MCB_MAPPING_ENTRY InsertedUpper;
+
+ UpperPart.RunStartVbn.QuadPart = Node.RunStartVbn.QuadPart + Amount;
+ UpperPart.SectorCount.QuadPart = Existing->RunStartVbn.QuadPart +
+ (Existing->SectorCount.QuadPart - Node.RunStartVbn.QuadPart);
+ UpperPart.StartingLbn.QuadPart = Existing->StartingLbn.QuadPart +
+ (Node.RunStartVbn.QuadPart - Existing->RunStartVbn.QuadPart);
+ LowerPart.RunStartVbn.QuadPart = Existing->RunStartVbn.QuadPart;
+ LowerPart.SectorCount.QuadPart = Node.RunStartVbn.QuadPart - Existing->RunStartVbn.QuadPart;
+ LowerPart.StartingLbn.QuadPart = Existing->StartingLbn.QuadPart;
+
+ Node = UpperPart;
+
+ DPRINT("Loop: %x\n", Node.RunStartVbn.LowPart);
+ while ((Result = McbBump(Mcb, &Node)) == MCB_BUMP_AGAIN)
+ {
+ DPRINT("Node: %x\n", Node.RunStartVbn.LowPart);
+ }
+ DPRINT("Done\n");
+
+ if (Result == MCB_BUMP_NO_MORE)
+ {
+ Node = *Existing;
+ RemoveHeadList(&Existing->Sequence);
+ RtlDeleteElementGenericTable(Mcb->Mapping, Existing);
+ Mcb->PairCount--;
+
+ // Adjust the element we found.
+ Existing->SectorCount = LowerPart.SectorCount;
+
+ InsertedUpper = RtlInsertElementGenericTable
+ (Mcb->Mapping, &UpperPart, sizeof(UpperPart), NULL);
+ if (!InsertedUpper)
+ {
+ // Just make it like it was
+ Existing->SectorCount = Node.SectorCount;
+ return FALSE;
+ }
+ InsertHeadList(GET_LIST_HEAD(Mcb->Mapping), &InsertedUpper->Sequence);
+ Mcb->PairCount++;
+ }
+ else
+ {
+ Node.RunStartVbn.QuadPart = Vbn;
+ Node.SectorCount.QuadPart = Amount;
+ while ((Result = McbBump(Mcb, &Node)) == MCB_BUMP_AGAIN);
+ return Result == MCB_BUMP_NO_MORE;
+ }
+ }
+
+ DPRINT("Done\n");
+
+ return TRUE;
+}
+
+/*
+ * @implemented
+ */
+BOOLEAN
+NTAPI
FsRtlSplitLargeMcb(IN PLARGE_MCB Mcb,
IN LONGLONG Vbn,
IN LONGLONG Amount)
{
- KeBugCheck(FILE_SYSTEM);
- return FALSE;
+ BOOLEAN Result;
+
+ DPRINT("FsRtlSplitLargeMcb %x, Vbn %x, Amount %x\n", Mcb, (ULONG)Vbn, (ULONG)Amount);
+
+ KeAcquireGuardedMutex(Mcb->GuardedMutex);
+ Result = FsRtlSplitBaseMcb(&(Mcb->BaseMcb),
+ Vbn,
+ Amount);
+ KeReleaseGuardedMutex(Mcb->GuardedMutex);
+
+ DPRINT("Done %d\n", Result);
+
+ return Result;
}
/*
*/
VOID
NTAPI
+FsRtlTruncateBaseMcb(IN PBASE_MCB Mcb,
+ IN LONGLONG Vbn)
+{
+ DPRINT("FsRtlTruncateBaseMcb(%x,%x)\n", Mcb, (ULONG)Vbn);
+ if (!Vbn)
+ {
+ DPRINT("Resetting\n");
+ FsRtlResetBaseMcb(Mcb);
+ }
+ else
+ {
+ LARGE_MCB_MAPPING_ENTRY Truncate;
+ PLARGE_MCB_MAPPING_ENTRY Found;
+ Truncate.RunStartVbn.QuadPart = Vbn;
+ Truncate.SectorCount.QuadPart = (1ull<<62) - Truncate.RunStartVbn.QuadPart;
+ while ((Found = RtlLookupElementGenericTable(Mcb->Mapping, &Truncate)))
+ {
+ DPRINT("Deleting %x\n", Found);
+ RemoveEntryList(&Found->Sequence);
+ RtlDeleteElementGenericTable(Mcb->Mapping, Found);
+ Mcb->PairCount--;
+ }
+ }
+ DPRINT("Done\n");
+}
+
+/*
+ * @implemented
+ */
+VOID
+NTAPI
FsRtlTruncateLargeMcb(IN PLARGE_MCB Mcb,
IN LONGLONG Vbn)
{
- KeBugCheck(FILE_SYSTEM);
+ DPRINT("FsRtlTruncateLargeMcb %x Vbn %x\n", Mcb, (ULONG)Vbn);
+ KeAcquireGuardedMutex(Mcb->GuardedMutex);
+ FsRtlTruncateBaseMcb(&(Mcb->BaseMcb),
+ Vbn);
+ KeReleaseGuardedMutex(Mcb->GuardedMutex);
+ DPRINT("Done\n");
}
/*
*/
VOID
NTAPI
-FsRtlTruncateMcb (IN PMCB Mcb,
- IN VBN Vbn)
+FsRtlUninitializeBaseMcb(IN PBASE_MCB Mcb)
{
- /* Call the newer function */
- FsRtlTruncateLargeMcb(&Mcb->DummyFieldThatSizesThisStructureCorrectly,
- (LONGLONG)Vbn);
+ DPRINT("FsRtlUninitializeBaseMcb(%x)\n", Mcb);
+ FsRtlResetBaseMcb(Mcb);
+
+ DPRINT("Mcb->Mapping %x\n", Mcb->Mapping);
+ if (Mcb->PoolType == PagedPool)
+ {
+ DPRINT("Deallocate to lookaside list\n");
+ ExFreeToPagedLookasideList(&FsRtlFirstMappingLookasideList,
+ Mcb->Mapping);
+ }
+ else
+ {
+ DPRINT("Deallocate\n");
+ ExFreePoolWithTag(Mcb->Mapping, 'FSBC');
+ }
+ Mcb->Mapping = NULL;
+ DPRINT("Done\n");
}
/*
- * @unimplemented
+ * @implemented
*/
VOID
NTAPI
FsRtlUninitializeLargeMcb(IN PLARGE_MCB Mcb)
{
- KeBugCheck(FILE_SYSTEM);
+ if (Mcb->GuardedMutex)
+ {
+ ExFreeToNPagedLookasideList(&FsRtlFastMutexLookasideList,
+ Mcb->GuardedMutex);
+ Mcb->GuardedMutex = NULL;
+ FsRtlUninitializeBaseMcb(&(Mcb->BaseMcb));
+ }
+}
+
+// MCB
+
+/*
+ * @implemented
+ */
+BOOLEAN
+NTAPI
+FsRtlAddMcbEntry(IN PMCB Mcb,
+ IN VBN Vbn,
+ IN LBN Lbn,
+ IN ULONG SectorCount)
+{
+ /* Call the newer function */
+ return FsRtlAddLargeMcbEntry(&Mcb->
+ DummyFieldThatSizesThisStructureCorrectly,
+ (LONGLONG)Vbn,
+ (LONGLONG)Lbn,
+ (LONGLONG)SectorCount);
+}
+
+/*
+ * @implemented
+ */
+BOOLEAN
+NTAPI
+FsRtlGetNextMcbEntry(IN PMCB Mcb,
+ IN ULONG RunIndex,
+ OUT PVBN Vbn,
+ OUT PLBN Lbn,
+ OUT PULONG SectorCount)
+{
+ BOOLEAN Return = FALSE;
+ LONGLONG llVbn;
+ LONGLONG llLbn;
+ LONGLONG llSectorCount;
+
+ /* Call the Large version */
+ Return = FsRtlGetNextLargeMcbEntry(
+ &Mcb->DummyFieldThatSizesThisStructureCorrectly,
+ RunIndex,
+ &llVbn,
+ &llLbn,
+ &llSectorCount);
+
+ /* Return the lower 32 bits */
+ *Vbn = (ULONG)llVbn;
+ *Lbn = (ULONG)llLbn;
+ *SectorCount = (ULONG)llSectorCount;
+
+ /* And return the original value */
+ return Return;
+}
+
+/*
+ * @implemented
+ */
+VOID
+NTAPI
+FsRtlInitializeMcb(IN PMCB Mcb,
+ IN POOL_TYPE PoolType)
+{
+ /* Call the newer function */
+ FsRtlInitializeLargeMcb(&Mcb->DummyFieldThatSizesThisStructureCorrectly,
+ PoolType);
+}
+
+/*
+ * @implemented
+ */
+BOOLEAN
+NTAPI
+FsRtlLookupLastMcbEntry(IN PMCB Mcb,
+ OUT PVBN Vbn,
+ OUT PLBN Lbn)
+{
+ BOOLEAN Return = FALSE;
+ LONGLONG llVbn = 0;
+ LONGLONG llLbn = 0;
+
+ /* Call the Large version */
+ Return = FsRtlLookupLastLargeMcbEntry(
+ &Mcb->DummyFieldThatSizesThisStructureCorrectly,
+ &llVbn,
+ &llLbn);
+
+ /* Return the lower 32-bits */
+ *Vbn = (ULONG)llVbn;
+ *Lbn = (ULONG)llLbn;
+
+ /* And return the original value */
+ return Return;
+}
+
+/*
+ * @implemented
+ */
+BOOLEAN
+NTAPI
+FsRtlLookupMcbEntry(IN PMCB Mcb,
+ IN VBN Vbn,
+ OUT PLBN Lbn,
+ OUT PULONG SectorCount OPTIONAL,
+ OUT PULONG Index)
+{
+ BOOLEAN Return = FALSE;
+ LONGLONG llLbn;
+ LONGLONG llSectorCount;
+
+ /* Call the Large version */
+ Return = FsRtlLookupLargeMcbEntry(&Mcb->
+ DummyFieldThatSizesThisStructureCorrectly,
+ (LONGLONG)Vbn,
+ &llLbn,
+ &llSectorCount,
+ NULL,
+ NULL,
+ Index);
+
+ /* Return the lower 32-bits */
+ *Lbn = (ULONG)llLbn;
+ if (SectorCount) *SectorCount = (ULONG)llSectorCount;
+
+ /* And return the original value */
+ return Return;
+}
+
+/*
+ * @implemented
+ */
+ULONG
+NTAPI
+FsRtlNumberOfRunsInMcb(IN PMCB Mcb)
+{
+ /* Call the newer function */
+ return FsRtlNumberOfRunsInLargeMcb(
+ &Mcb->DummyFieldThatSizesThisStructureCorrectly);
+}
+
+/*
+ * @implemented
+ */
+VOID
+NTAPI
+FsRtlRemoveMcbEntry(IN PMCB Mcb,
+ IN VBN Vbn,
+ IN ULONG SectorCount)
+{
+ /* Call the large function */
+ FsRtlRemoveLargeMcbEntry(&Mcb->DummyFieldThatSizesThisStructureCorrectly,
+ (LONGLONG)Vbn,
+ (LONGLONG)SectorCount);
+}
+
+/*
+ * @implemented
+ */
+VOID
+NTAPI
+FsRtlTruncateMcb(IN PMCB Mcb,
+ IN VBN Vbn)
+{
+ /* Call the newer function */
+ FsRtlTruncateLargeMcb(&Mcb->DummyFieldThatSizesThisStructureCorrectly,
+ (LONGLONG)Vbn);
}
/*
projects / reactos.git / blobdiff