* PURPOSE: Cache manager
*
* PROGRAMMERS: David Welch (welch@mcmail.com)
+ * Pierre Schweitzer (pierre@reactos.org)
*/
/* NOTES **********************************************************************
/* GLOBALS *******************************************************************/
-static LIST_ENTRY DirtyVacbListHead;
+LIST_ENTRY DirtyVacbListHead;
static LIST_ENTRY VacbLruListHead;
-ULONG DirtyPageCount = 0;
-
-KGUARDED_MUTEX ViewLock;
NPAGED_LOOKASIDE_LIST iBcbLookasideList;
static NPAGED_LOOKASIDE_LIST SharedCacheMapLookasideList;
static NPAGED_LOOKASIDE_LIST VacbLookasideList;
+/* Internal vars (MS):
+ * - Threshold above which lazy writer will start action
+ * - Amount of dirty pages
+ * - List for deferred writes
+ * - Spinlock when dealing with the deferred list
+ * - List for "clean" shared cache maps
+ */
+ULONG CcDirtyPageThreshold = 0;
+ULONG CcTotalDirtyPages = 0;
+LIST_ENTRY CcDeferredWrites;
+KSPIN_LOCK CcDeferredWriteSpinLock;
+LIST_ENTRY CcCleanSharedCacheMapList;
+
#if DBG
-static void CcRosVacbIncRefCount_(PROS_VACB vacb, const char* file, int line)
+ULONG CcRosVacbIncRefCount_(PROS_VACB vacb, PCSTR file, INT line)
{
- ++vacb->ReferenceCount;
+ ULONG Refs;
+
+ Refs = InterlockedIncrement((PLONG)&vacb->ReferenceCount);
if (vacb->SharedCacheMap->Trace)
{
DbgPrint("(%s:%i) VACB %p ++RefCount=%lu, Dirty %u, PageOut %lu\n",
- file, line, vacb, vacb->ReferenceCount, vacb->Dirty, vacb->PageOut);
+ file, line, vacb, Refs, vacb->Dirty, vacb->PageOut);
}
+
+ return Refs;
}
-static void CcRosVacbDecRefCount_(PROS_VACB vacb, const char* file, int line)
+ULONG CcRosVacbDecRefCount_(PROS_VACB vacb, PCSTR file, INT line)
{
- --vacb->ReferenceCount;
+ ULONG Refs;
+
+ Refs = InterlockedDecrement((PLONG)&vacb->ReferenceCount);
+ ASSERT(!(Refs == 0 && vacb->Dirty));
if (vacb->SharedCacheMap->Trace)
{
DbgPrint("(%s:%i) VACB %p --RefCount=%lu, Dirty %u, PageOut %lu\n",
- file, line, vacb, vacb->ReferenceCount, vacb->Dirty, vacb->PageOut);
+ file, line, vacb, Refs, vacb->Dirty, vacb->PageOut);
}
+
+ if (Refs == 0)
+ {
+ CcRosInternalFreeVacb(vacb);
+ }
+
+ return Refs;
}
-#define CcRosVacbIncRefCount(vacb) CcRosVacbIncRefCount_(vacb,__FILE__,__LINE__)
-#define CcRosVacbDecRefCount(vacb) CcRosVacbDecRefCount_(vacb,__FILE__,__LINE__)
-#else
-#define CcRosVacbIncRefCount(vacb) (++((vacb)->ReferenceCount))
-#define CcRosVacbDecRefCount(vacb) (--((vacb)->ReferenceCount))
-#endif
+ULONG CcRosVacbGetRefCount_(PROS_VACB vacb, PCSTR file, INT line)
+{
+ ULONG Refs;
-NTSTATUS
-CcRosInternalFreeVacb(PROS_VACB Vacb);
+ Refs = InterlockedCompareExchange((PLONG)&vacb->ReferenceCount, 0, 0);
+ if (vacb->SharedCacheMap->Trace)
+ {
+ DbgPrint("(%s:%i) VACB %p ==RefCount=%lu, Dirty %u, PageOut %lu\n",
+ file, line, vacb, Refs, vacb->Dirty, vacb->PageOut);
+ }
+
+ return Refs;
+}
+#endif
/* FUNCTIONS *****************************************************************/
{
DPRINT1("Enabling Tracing for CacheMap 0x%p:\n", SharedCacheMap);
- KeAcquireGuardedMutex(&ViewLock);
- KeAcquireSpinLock(&SharedCacheMap->CacheMapLock, &oldirql);
+ oldirql = KeAcquireQueuedSpinLock(LockQueueMasterLock);
+ KeAcquireSpinLockAtDpcLevel(&SharedCacheMap->CacheMapLock);
current_entry = SharedCacheMap->CacheMapVacbListHead.Flink;
while (current_entry != &SharedCacheMap->CacheMapVacbListHead)
DPRINT1(" VACB 0x%p enabled, RefCount %lu, Dirty %u, PageOut %lu\n",
current, current->ReferenceCount, current->Dirty, current->PageOut );
}
- KeReleaseSpinLock(&SharedCacheMap->CacheMapLock, oldirql);
- KeReleaseGuardedMutex(&ViewLock);
+
+ KeReleaseSpinLockFromDpcLevel(&SharedCacheMap->CacheMapLock);
+ KeReleaseQueuedSpinLock(LockQueueMasterLock, oldirql);
}
else
{
PROS_VACB Vacb)
{
NTSTATUS Status;
- KIRQL oldIrql;
+
+ CcRosUnmarkDirtyVacb(Vacb, TRUE);
Status = CcWriteVirtualAddress(Vacb);
- if (NT_SUCCESS(Status))
+ if (!NT_SUCCESS(Status))
{
- KeAcquireGuardedMutex(&ViewLock);
- KeAcquireSpinLock(&Vacb->SharedCacheMap->CacheMapLock, &oldIrql);
-
- Vacb->Dirty = FALSE;
- RemoveEntryList(&Vacb->DirtyVacbListEntry);
- DirtyPageCount -= VACB_MAPPING_GRANULARITY / PAGE_SIZE;
- CcRosVacbDecRefCount(Vacb);
-
- KeReleaseSpinLock(&Vacb->SharedCacheMap->CacheMapLock, oldIrql);
- KeReleaseGuardedMutex(&ViewLock);
+ CcRosMarkDirtyVacb(Vacb);
}
return Status;
CcRosFlushDirtyPages (
ULONG Target,
PULONG Count,
- BOOLEAN Wait)
+ BOOLEAN Wait,
+ BOOLEAN CalledFromLazy)
{
PLIST_ENTRY current_entry;
PROS_VACB current;
BOOLEAN Locked;
NTSTATUS Status;
- LARGE_INTEGER ZeroTimeout;
+ KIRQL OldIrql;
DPRINT("CcRosFlushDirtyPages(Target %lu)\n", Target);
(*Count) = 0;
- ZeroTimeout.QuadPart = 0;
KeEnterCriticalRegion();
- KeAcquireGuardedMutex(&ViewLock);
+ OldIrql = KeAcquireQueuedSpinLock(LockQueueMasterLock);
current_entry = DirtyVacbListHead.Flink;
if (current_entry == &DirtyVacbListHead)
CcRosVacbIncRefCount(current);
- Locked = current->SharedCacheMap->Callbacks->AcquireForLazyWrite(
- current->SharedCacheMap->LazyWriteContext, Wait);
- if (!Locked)
+ /* When performing lazy write, don't handle temporary files */
+ if (CalledFromLazy &&
+ BooleanFlagOn(current->SharedCacheMap->FileObject->Flags, FO_TEMPORARY_FILE))
{
CcRosVacbDecRefCount(current);
continue;
}
- Status = KeWaitForSingleObject(¤t->Mutex,
- Executive,
- KernelMode,
- FALSE,
- Wait ? NULL : &ZeroTimeout);
- if (Status != STATUS_SUCCESS)
+ /* Don't attempt to lazy write the files that asked not to */
+ if (CalledFromLazy &&
+ BooleanFlagOn(current->SharedCacheMap->Flags, WRITEBEHIND_DISABLED))
{
- current->SharedCacheMap->Callbacks->ReleaseFromLazyWrite(
- current->SharedCacheMap->LazyWriteContext);
CcRosVacbDecRefCount(current);
continue;
}
ASSERT(current->Dirty);
- /* One reference is added above */
- if (current->ReferenceCount > 2)
+ KeReleaseQueuedSpinLock(LockQueueMasterLock, OldIrql);
+
+ Locked = current->SharedCacheMap->Callbacks->AcquireForLazyWrite(
+ current->SharedCacheMap->LazyWriteContext, Wait);
+ if (!Locked)
{
- KeReleaseMutex(¤t->Mutex, FALSE);
- current->SharedCacheMap->Callbacks->ReleaseFromLazyWrite(
- current->SharedCacheMap->LazyWriteContext);
+ OldIrql = KeAcquireQueuedSpinLock(LockQueueMasterLock);
CcRosVacbDecRefCount(current);
continue;
}
- KeReleaseGuardedMutex(&ViewLock);
-
Status = CcRosFlushVacb(current);
- KeReleaseMutex(¤t->Mutex, FALSE);
current->SharedCacheMap->Callbacks->ReleaseFromLazyWrite(
current->SharedCacheMap->LazyWriteContext);
- KeAcquireGuardedMutex(&ViewLock);
+ OldIrql = KeAcquireQueuedSpinLock(LockQueueMasterLock);
CcRosVacbDecRefCount(current);
- if (!NT_SUCCESS(Status) && (Status != STATUS_END_OF_FILE))
+ if (!NT_SUCCESS(Status) && (Status != STATUS_END_OF_FILE) &&
+ (Status != STATUS_MEDIA_WRITE_PROTECTED))
{
DPRINT1("CC: Failed to flush VACB.\n");
}
else
{
- (*Count) += VACB_MAPPING_GRANULARITY / PAGE_SIZE;
- Target -= VACB_MAPPING_GRANULARITY / PAGE_SIZE;
+ ULONG PagesFreed;
+
+ /* How many pages did we free? */
+ PagesFreed = VACB_MAPPING_GRANULARITY / PAGE_SIZE;
+ (*Count) += PagesFreed;
+
+ /* Make sure we don't overflow target! */
+ if (Target < PagesFreed)
+ {
+ /* If we would have, jump to zero directly */
+ Target = 0;
+ }
+ else
+ {
+ Target -= PagesFreed;
+ }
}
current_entry = DirtyVacbListHead.Flink;
}
- KeReleaseGuardedMutex(&ViewLock);
+ KeReleaseQueuedSpinLock(LockQueueMasterLock, OldIrql);
KeLeaveCriticalRegion();
DPRINT("CcRosFlushDirtyPages() finished\n");
*NrFreed = 0;
retry:
- KeAcquireGuardedMutex(&ViewLock);
+ oldIrql = KeAcquireQueuedSpinLock(LockQueueMasterLock);
current_entry = VacbLruListHead.Flink;
while (current_entry != &VacbLruListHead)
{
+ ULONG Refs;
+
current = CONTAINING_RECORD(current_entry,
ROS_VACB,
VacbLruListEntry);
current_entry = current_entry->Flink;
- KeAcquireSpinLock(¤t->SharedCacheMap->CacheMapLock, &oldIrql);
+ KeAcquireSpinLockAtDpcLevel(¤t->SharedCacheMap->CacheMapLock);
/* Reference the VACB */
CcRosVacbIncRefCount(current);
/* Check if it's mapped and not dirty */
- if (current->MappedCount > 0 && !current->Dirty)
+ if (InterlockedCompareExchange((PLONG)¤t->MappedCount, 0, 0) > 0 && !current->Dirty)
{
/* We have to break these locks because Cc sucks */
- KeReleaseSpinLock(¤t->SharedCacheMap->CacheMapLock, oldIrql);
- KeReleaseGuardedMutex(&ViewLock);
+ KeReleaseSpinLockFromDpcLevel(¤t->SharedCacheMap->CacheMapLock);
+ KeReleaseQueuedSpinLock(LockQueueMasterLock, oldIrql);
/* Page out the VACB */
for (i = 0; i < VACB_MAPPING_GRANULARITY / PAGE_SIZE; i++)
}
/* Reacquire the locks */
- KeAcquireGuardedMutex(&ViewLock);
- KeAcquireSpinLock(¤t->SharedCacheMap->CacheMapLock, &oldIrql);
+ oldIrql = KeAcquireQueuedSpinLock(LockQueueMasterLock);
+ KeAcquireSpinLockAtDpcLevel(¤t->SharedCacheMap->CacheMapLock);
}
/* Dereference the VACB */
- CcRosVacbDecRefCount(current);
+ Refs = CcRosVacbDecRefCount(current);
/* Check if we can free this entry now */
- if (current->ReferenceCount == 0)
+ if (Refs < 2)
{
ASSERT(!current->Dirty);
ASSERT(!current->MappedCount);
+ ASSERT(Refs == 1);
RemoveEntryList(¤t->CacheMapVacbListEntry);
RemoveEntryList(¤t->VacbLruListEntry);
+ InitializeListHead(¤t->VacbLruListEntry);
InsertHeadList(&FreeList, ¤t->CacheMapVacbListEntry);
/* Calculate how many pages we freed for Mm */
(*NrFreed) += PagesFreed;
}
- KeReleaseSpinLock(¤t->SharedCacheMap->CacheMapLock, oldIrql);
+ KeReleaseSpinLockFromDpcLevel(¤t->SharedCacheMap->CacheMapLock);
}
- KeReleaseGuardedMutex(&ViewLock);
+ KeReleaseQueuedSpinLock(LockQueueMasterLock, oldIrql);
/* Try flushing pages if we haven't met our target */
if ((Target > 0) && !FlushedPages)
{
/* Flush dirty pages to disk */
- CcRosFlushDirtyPages(Target, &PagesFreed, FALSE);
+ CcRosFlushDirtyPages(Target, &PagesFreed, FALSE, FALSE);
FlushedPages = TRUE;
/* We can only swap as many pages as we flushed */
while (!IsListEmpty(&FreeList))
{
+ ULONG Refs;
+
current_entry = RemoveHeadList(&FreeList);
current = CONTAINING_RECORD(current_entry,
ROS_VACB,
CacheMapVacbListEntry);
- CcRosInternalFreeVacb(current);
+ InitializeListHead(¤t->CacheMapVacbListEntry);
+ Refs = CcRosVacbDecRefCount(current);
+ ASSERT(Refs == 0);
}
DPRINT("Evicted %lu cache pages\n", (*NrFreed));
BOOLEAN Dirty,
BOOLEAN Mapped)
{
- BOOLEAN WasDirty;
- KIRQL oldIrql;
-
+ ULONG Refs;
ASSERT(SharedCacheMap);
DPRINT("CcRosReleaseVacb(SharedCacheMap 0x%p, Vacb 0x%p, Valid %u)\n",
SharedCacheMap, Vacb, Valid);
- KeAcquireGuardedMutex(&ViewLock);
- KeAcquireSpinLock(&SharedCacheMap->CacheMapLock, &oldIrql);
-
Vacb->Valid = Valid;
- WasDirty = Vacb->Dirty;
- Vacb->Dirty = Vacb->Dirty || Dirty;
-
- if (!WasDirty && Vacb->Dirty)
+ if (Dirty && !Vacb->Dirty)
{
- InsertTailList(&DirtyVacbListHead, &Vacb->DirtyVacbListEntry);
- DirtyPageCount += VACB_MAPPING_GRANULARITY / PAGE_SIZE;
+ CcRosMarkDirtyVacb(Vacb);
}
if (Mapped)
{
- Vacb->MappedCount++;
- }
- CcRosVacbDecRefCount(Vacb);
- if (Mapped && (Vacb->MappedCount == 1))
- {
- CcRosVacbIncRefCount(Vacb);
- }
- if (!WasDirty && Vacb->Dirty)
- {
- CcRosVacbIncRefCount(Vacb);
+ if (InterlockedIncrement((PLONG)&Vacb->MappedCount) == 1)
+ {
+ CcRosVacbIncRefCount(Vacb);
+ }
}
- KeReleaseSpinLock(&SharedCacheMap->CacheMapLock, oldIrql);
- KeReleaseGuardedMutex(&ViewLock);
- KeReleaseMutex(&Vacb->Mutex, FALSE);
+ Refs = CcRosVacbDecRefCount(Vacb);
+ ASSERT(Refs > 0);
return STATUS_SUCCESS;
}
DPRINT("CcRosLookupVacb(SharedCacheMap 0x%p, FileOffset %I64u)\n",
SharedCacheMap, FileOffset);
- KeAcquireGuardedMutex(&ViewLock);
- KeAcquireSpinLock(&SharedCacheMap->CacheMapLock, &oldIrql);
+ oldIrql = KeAcquireQueuedSpinLock(LockQueueMasterLock);
+ KeAcquireSpinLockAtDpcLevel(&SharedCacheMap->CacheMapLock);
current_entry = SharedCacheMap->CacheMapVacbListHead.Flink;
while (current_entry != &SharedCacheMap->CacheMapVacbListHead)
FileOffset))
{
CcRosVacbIncRefCount(current);
- KeReleaseSpinLock(&SharedCacheMap->CacheMapLock, oldIrql);
- KeReleaseGuardedMutex(&ViewLock);
- KeWaitForSingleObject(¤t->Mutex,
- Executive,
- KernelMode,
- FALSE,
- NULL);
+ KeReleaseSpinLockFromDpcLevel(&SharedCacheMap->CacheMapLock);
+ KeReleaseQueuedSpinLock(LockQueueMasterLock, oldIrql);
return current;
}
if (current->FileOffset.QuadPart > FileOffset)
current_entry = current_entry->Flink;
}
- KeReleaseSpinLock(&SharedCacheMap->CacheMapLock, oldIrql);
- KeReleaseGuardedMutex(&ViewLock);
+ KeReleaseSpinLockFromDpcLevel(&SharedCacheMap->CacheMapLock);
+ KeReleaseQueuedSpinLock(LockQueueMasterLock, oldIrql);
return NULL;
}
-NTSTATUS
+VOID
NTAPI
CcRosMarkDirtyVacb (
- PROS_SHARED_CACHE_MAP SharedCacheMap,
- LONGLONG FileOffset)
+ PROS_VACB Vacb)
{
- PROS_VACB Vacb;
KIRQL oldIrql;
+ PROS_SHARED_CACHE_MAP SharedCacheMap;
- ASSERT(SharedCacheMap);
+ SharedCacheMap = Vacb->SharedCacheMap;
- DPRINT("CcRosMarkDirtyVacb(SharedCacheMap 0x%p, FileOffset %I64u)\n",
- SharedCacheMap, FileOffset);
+ oldIrql = KeAcquireQueuedSpinLock(LockQueueMasterLock);
+ KeAcquireSpinLockAtDpcLevel(&SharedCacheMap->CacheMapLock);
- Vacb = CcRosLookupVacb(SharedCacheMap, FileOffset);
- if (Vacb == NULL)
+ ASSERT(!Vacb->Dirty);
+
+ InsertTailList(&DirtyVacbListHead, &Vacb->DirtyVacbListEntry);
+ CcTotalDirtyPages += VACB_MAPPING_GRANULARITY / PAGE_SIZE;
+ Vacb->SharedCacheMap->DirtyPages += VACB_MAPPING_GRANULARITY / PAGE_SIZE;
+ CcRosVacbIncRefCount(Vacb);
+
+ /* Move to the tail of the LRU list */
+ RemoveEntryList(&Vacb->VacbLruListEntry);
+ InsertTailList(&VacbLruListHead, &Vacb->VacbLruListEntry);
+
+ Vacb->Dirty = TRUE;
+
+ KeReleaseSpinLockFromDpcLevel(&SharedCacheMap->CacheMapLock);
+
+ /* Schedule a lazy writer run to now that we have dirty VACB */
+ if (!LazyWriter.ScanActive)
{
- KeBugCheck(CACHE_MANAGER);
+ CcScheduleLazyWriteScan(FALSE);
}
+ KeReleaseQueuedSpinLock(LockQueueMasterLock, oldIrql);
+}
- KeAcquireGuardedMutex(&ViewLock);
- KeAcquireSpinLock(&SharedCacheMap->CacheMapLock, &oldIrql);
+VOID
+NTAPI
+CcRosUnmarkDirtyVacb (
+ PROS_VACB Vacb,
+ BOOLEAN LockViews)
+{
+ KIRQL oldIrql;
+ PROS_SHARED_CACHE_MAP SharedCacheMap;
+
+ SharedCacheMap = Vacb->SharedCacheMap;
- if (!Vacb->Dirty)
+ if (LockViews)
{
- InsertTailList(&DirtyVacbListHead, &Vacb->DirtyVacbListEntry);
- DirtyPageCount += VACB_MAPPING_GRANULARITY / PAGE_SIZE;
+ oldIrql = KeAcquireQueuedSpinLock(LockQueueMasterLock);
+ KeAcquireSpinLockAtDpcLevel(&SharedCacheMap->CacheMapLock);
}
- else
+
+ ASSERT(Vacb->Dirty);
+
+ Vacb->Dirty = FALSE;
+
+ RemoveEntryList(&Vacb->DirtyVacbListEntry);
+ InitializeListHead(&Vacb->DirtyVacbListEntry);
+ CcTotalDirtyPages -= VACB_MAPPING_GRANULARITY / PAGE_SIZE;
+ Vacb->SharedCacheMap->DirtyPages -= VACB_MAPPING_GRANULARITY / PAGE_SIZE;
+ CcRosVacbDecRefCount(Vacb);
+
+ if (LockViews)
{
- CcRosVacbDecRefCount(Vacb);
+ KeReleaseSpinLockFromDpcLevel(&SharedCacheMap->CacheMapLock);
+ KeReleaseQueuedSpinLock(LockQueueMasterLock, oldIrql);
}
+}
- /* Move to the tail of the LRU list */
- RemoveEntryList(&Vacb->VacbLruListEntry);
- InsertTailList(&VacbLruListHead, &Vacb->VacbLruListEntry);
+NTSTATUS
+NTAPI
+CcRosMarkDirtyFile (
+ PROS_SHARED_CACHE_MAP SharedCacheMap,
+ LONGLONG FileOffset)
+{
+ PROS_VACB Vacb;
- Vacb->Dirty = TRUE;
+ ASSERT(SharedCacheMap);
+
+ DPRINT("CcRosMarkDirtyVacb(SharedCacheMap 0x%p, FileOffset %I64u)\n",
+ SharedCacheMap, FileOffset);
+
+ Vacb = CcRosLookupVacb(SharedCacheMap, FileOffset);
+ if (Vacb == NULL)
+ {
+ KeBugCheck(CACHE_MANAGER);
+ }
- KeReleaseSpinLock(&SharedCacheMap->CacheMapLock, oldIrql);
- KeReleaseGuardedMutex(&ViewLock);
- KeReleaseMutex(&Vacb->Mutex, FALSE);
+ CcRosReleaseVacb(SharedCacheMap, Vacb, Vacb->Valid, TRUE, FALSE);
return STATUS_SUCCESS;
}
+/*
+ * Note: this is not the contrary function of
+ * CcRosMapVacbInKernelSpace()
+ */
NTSTATUS
NTAPI
CcRosUnmapVacb (
BOOLEAN NowDirty)
{
PROS_VACB Vacb;
- BOOLEAN WasDirty;
- KIRQL oldIrql;
ASSERT(SharedCacheMap);
return STATUS_UNSUCCESSFUL;
}
- KeAcquireGuardedMutex(&ViewLock);
- KeAcquireSpinLock(&SharedCacheMap->CacheMapLock, &oldIrql);
-
- WasDirty = Vacb->Dirty;
- Vacb->Dirty = Vacb->Dirty || NowDirty;
-
- Vacb->MappedCount--;
-
- if (!WasDirty && NowDirty)
- {
- InsertTailList(&DirtyVacbListHead, &Vacb->DirtyVacbListEntry);
- DirtyPageCount += VACB_MAPPING_GRANULARITY / PAGE_SIZE;
- }
-
- CcRosVacbDecRefCount(Vacb);
- if (!WasDirty && NowDirty)
- {
- CcRosVacbIncRefCount(Vacb);
- }
- if (Vacb->MappedCount == 0)
+ ASSERT(Vacb->MappedCount != 0);
+ if (InterlockedDecrement((PLONG)&Vacb->MappedCount) == 0)
{
CcRosVacbDecRefCount(Vacb);
}
- KeReleaseSpinLock(&SharedCacheMap->CacheMapLock, oldIrql);
- KeReleaseGuardedMutex(&ViewLock);
- KeReleaseMutex(&Vacb->Mutex, FALSE);
+ CcRosReleaseVacb(SharedCacheMap, Vacb, Vacb->Valid, NowDirty, FALSE);
return STATUS_SUCCESS;
}
static
NTSTATUS
-CcRosMapVacb(
+CcRosMapVacbInKernelSpace(
PROS_VACB Vacb)
{
ULONG i;
NTSTATUS Status;
ULONG_PTR NumberOfPages;
+ PVOID BaseAddress = NULL;
/* Create a memory area. */
MmLockAddressSpace(MmGetKernelAddressSpace());
Status = MmCreateMemoryArea(MmGetKernelAddressSpace(),
0, // nothing checks for VACB mareas, so set to 0
- &Vacb->BaseAddress,
+ &BaseAddress,
VACB_MAPPING_GRANULARITY,
PAGE_READWRITE,
(PMEMORY_AREA*)&Vacb->MemoryArea,
- FALSE,
0,
PAGE_SIZE);
+ ASSERT(Vacb->BaseAddress == NULL);
+ Vacb->BaseAddress = BaseAddress;
MmUnlockAddressSpace(MmGetKernelAddressSpace());
if (!NT_SUCCESS(Status))
{
- KeBugCheck(CACHE_MANAGER);
+ DPRINT1("MmCreateMemoryArea failed with %lx for VACB %p\n", Status, Vacb);
+ return Status;
}
ASSERT(((ULONG_PTR)Vacb->BaseAddress % PAGE_SIZE) == 0);
ASSERT((ULONG_PTR)Vacb->BaseAddress > (ULONG_PTR)MmSystemRangeStart);
+ ASSERT((ULONG_PTR)Vacb->BaseAddress + VACB_MAPPING_GRANULARITY - 1 > (ULONG_PTR)MmSystemRangeStart);
/* Create a virtual mapping for this memory area */
NumberOfPages = BYTES_TO_PAGES(VACB_MAPPING_GRANULARITY);
{
PFN_NUMBER PageFrameNumber;
+ MI_SET_USAGE(MI_USAGE_CACHE);
Status = MmRequestPageMemoryConsumer(MC_CACHE, TRUE, &PageFrameNumber);
if (PageFrameNumber == 0)
{
KeBugCheck(MEMORY_MANAGEMENT);
}
+ ASSERT(BaseAddress == Vacb->BaseAddress);
+ ASSERT(i * PAGE_SIZE < VACB_MAPPING_GRANULARITY);
+ ASSERT((ULONG_PTR)Vacb->BaseAddress + (i * PAGE_SIZE) >= (ULONG_PTR)BaseAddress);
+ ASSERT((ULONG_PTR)Vacb->BaseAddress + (i * PAGE_SIZE) > (ULONG_PTR)MmSystemRangeStart);
+
Status = MmCreateVirtualMapping(NULL,
(PVOID)((ULONG_PTR)Vacb->BaseAddress + (i * PAGE_SIZE)),
PAGE_READWRITE,
return STATUS_SUCCESS;
}
+static
+BOOLEAN
+CcRosFreeUnusedVacb (
+ PULONG Count)
+{
+ ULONG cFreed;
+ BOOLEAN Freed;
+ KIRQL oldIrql;
+ PROS_VACB current;
+ LIST_ENTRY FreeList;
+ PLIST_ENTRY current_entry;
+
+ cFreed = 0;
+ Freed = FALSE;
+ InitializeListHead(&FreeList);
+
+ oldIrql = KeAcquireQueuedSpinLock(LockQueueMasterLock);
+
+ /* Browse all the available VACB */
+ current_entry = VacbLruListHead.Flink;
+ while (current_entry != &VacbLruListHead)
+ {
+ ULONG Refs;
+
+ current = CONTAINING_RECORD(current_entry,
+ ROS_VACB,
+ VacbLruListEntry);
+ current_entry = current_entry->Flink;
+
+ KeAcquireSpinLockAtDpcLevel(¤t->SharedCacheMap->CacheMapLock);
+
+ /* Only deal with unused VACB, we will free them */
+ Refs = CcRosVacbGetRefCount(current);
+ if (Refs < 2)
+ {
+ ASSERT(!current->Dirty);
+ ASSERT(!current->MappedCount);
+ ASSERT(Refs == 1);
+
+ /* Reset and move to free list */
+ RemoveEntryList(¤t->CacheMapVacbListEntry);
+ RemoveEntryList(¤t->VacbLruListEntry);
+ InitializeListHead(¤t->VacbLruListEntry);
+ InsertHeadList(&FreeList, ¤t->CacheMapVacbListEntry);
+ }
+
+ KeReleaseSpinLockFromDpcLevel(¤t->SharedCacheMap->CacheMapLock);
+
+ }
+
+ KeReleaseQueuedSpinLock(LockQueueMasterLock, oldIrql);
+
+ /* And now, free any of the found VACB, that'll free memory! */
+ while (!IsListEmpty(&FreeList))
+ {
+ ULONG Refs;
+
+ current_entry = RemoveHeadList(&FreeList);
+ current = CONTAINING_RECORD(current_entry,
+ ROS_VACB,
+ CacheMapVacbListEntry);
+ InitializeListHead(¤t->CacheMapVacbListEntry);
+ Refs = CcRosVacbDecRefCount(current);
+ ASSERT(Refs == 0);
+ ++cFreed;
+ }
+
+ /* If we freed at least one VACB, return success */
+ if (cFreed != 0)
+ {
+ Freed = TRUE;
+ }
+
+ /* If caller asked for free count, return it */
+ if (Count != NULL)
+ {
+ *Count = cFreed;
+ }
+
+ return Freed;
+}
+
static
NTSTATUS
CcRosCreateVacb (
PLIST_ENTRY current_entry;
NTSTATUS Status;
KIRQL oldIrql;
+ ULONG Refs;
+ BOOLEAN Retried;
ASSERT(SharedCacheMap);
DPRINT("CcRosCreateVacb()\n");
- if (FileOffset >= SharedCacheMap->FileSize.QuadPart)
+ if (FileOffset >= SharedCacheMap->SectionSize.QuadPart)
{
*Vacb = NULL;
return STATUS_INVALID_PARAMETER;
}
#endif
current->MappedCount = 0;
- current->DirtyVacbListEntry.Flink = NULL;
- current->DirtyVacbListEntry.Blink = NULL;
- current->ReferenceCount = 1;
- KeInitializeMutex(¤t->Mutex, 0);
- KeWaitForSingleObject(¤t->Mutex,
- Executive,
- KernelMode,
- FALSE,
- NULL);
- KeAcquireGuardedMutex(&ViewLock);
+ current->ReferenceCount = 0;
+ InitializeListHead(¤t->CacheMapVacbListEntry);
+ InitializeListHead(¤t->DirtyVacbListEntry);
+ InitializeListHead(¤t->VacbLruListEntry);
+
+ CcRosVacbIncRefCount(current);
+
+ Retried = FALSE;
+Retry:
+ /* Map VACB in kernel space */
+ Status = CcRosMapVacbInKernelSpace(current);
+ if (!NT_SUCCESS(Status))
+ {
+ ULONG Freed;
+ /* If no space left, try to prune unused VACB
+ * to recover space to map our VACB
+ * If it succeed, retry to map, otherwise
+ * just fail.
+ */
+ if (!Retried && CcRosFreeUnusedVacb(&Freed))
+ {
+ DPRINT("Prunned %d VACB, trying again\n", Freed);
+ Retried = TRUE;
+ goto Retry;
+ }
+
+ ExFreeToNPagedLookasideList(&VacbLookasideList, current);
+ return Status;
+ }
+
+ oldIrql = KeAcquireQueuedSpinLock(LockQueueMasterLock);
*Vacb = current;
/* There is window between the call to CcRosLookupVacb
* file offset exist. If there is a VACB, we release
* our newly created VACB and return the existing one.
*/
- KeAcquireSpinLock(&SharedCacheMap->CacheMapLock, &oldIrql);
+ KeAcquireSpinLockAtDpcLevel(&SharedCacheMap->CacheMapLock);
current_entry = SharedCacheMap->CacheMapVacbListHead.Flink;
previous = NULL;
while (current_entry != &SharedCacheMap->CacheMapVacbListHead)
FileOffset))
{
CcRosVacbIncRefCount(current);
- KeReleaseSpinLock(&SharedCacheMap->CacheMapLock, oldIrql);
+ KeReleaseSpinLockFromDpcLevel(&SharedCacheMap->CacheMapLock);
#if DBG
if (SharedCacheMap->Trace)
{
current);
}
#endif
- KeReleaseMutex(&(*Vacb)->Mutex, FALSE);
- KeReleaseGuardedMutex(&ViewLock);
- ExFreeToNPagedLookasideList(&VacbLookasideList, *Vacb);
+ KeReleaseQueuedSpinLock(LockQueueMasterLock, oldIrql);
+
+ Refs = CcRosVacbDecRefCount(*Vacb);
+ ASSERT(Refs == 0);
+
*Vacb = current;
- KeWaitForSingleObject(¤t->Mutex,
- Executive,
- KernelMode,
- FALSE,
- NULL);
return STATUS_SUCCESS;
}
if (current->FileOffset.QuadPart < FileOffset)
{
InsertHeadList(&SharedCacheMap->CacheMapVacbListHead, ¤t->CacheMapVacbListEntry);
}
- KeReleaseSpinLock(&SharedCacheMap->CacheMapLock, oldIrql);
+ KeReleaseSpinLockFromDpcLevel(&SharedCacheMap->CacheMapLock);
InsertTailList(&VacbLruListHead, ¤t->VacbLruListEntry);
- KeReleaseGuardedMutex(&ViewLock);
+ KeReleaseQueuedSpinLock(LockQueueMasterLock, oldIrql);
MI_SET_USAGE(MI_USAGE_CACHE);
#if MI_TRACE_PFNS
if ((SharedCacheMap->FileObject) && (SharedCacheMap->FileObject->FileName.Buffer))
{
- PWCHAR pos = NULL;
+ PWCHAR pos;
ULONG len = 0;
pos = wcsrchr(SharedCacheMap->FileObject->FileName.Buffer, '\\');
- len = wcslen(pos) * sizeof(WCHAR);
- if (pos) snprintf(MI_PFN_CURRENT_PROCESS_NAME, min(16, len), "%S", pos);
+ if (pos)
+ {
+ len = wcslen(pos) * sizeof(WCHAR);
+ snprintf(MI_PFN_CURRENT_PROCESS_NAME, min(16, len), "%S", pos);
+ }
+ else
+ {
+ snprintf(MI_PFN_CURRENT_PROCESS_NAME, min(16, len), "%wZ", &SharedCacheMap->FileObject->FileName);
+ }
}
#endif
- Status = CcRosMapVacb(current);
+ /* Reference it to allow release */
+ CcRosVacbIncRefCount(current);
return Status;
}
{
PROS_VACB current;
NTSTATUS Status;
+ ULONG Refs;
+ KIRQL OldIrql;
ASSERT(SharedCacheMap);
}
}
- KeAcquireGuardedMutex(&ViewLock);
+ Refs = CcRosVacbGetRefCount(current);
+
+ OldIrql = KeAcquireQueuedSpinLock(LockQueueMasterLock);
/* Move to the tail of the LRU list */
RemoveEntryList(¤t->VacbLruListEntry);
InsertTailList(&VacbLruListHead, ¤t->VacbLruListEntry);
- KeReleaseGuardedMutex(&ViewLock);
+ KeReleaseQueuedSpinLock(LockQueueMasterLock, OldIrql);
/*
* Return information about the VACB to the caller.
DPRINT("*BaseAddress %p\n", *BaseAddress);
*Vacb = current;
*BaseOffset = current->FileOffset.QuadPart;
+
+ ASSERT(Refs > 1);
+
return STATUS_SUCCESS;
}
NULL);
MmUnlockAddressSpace(MmGetKernelAddressSpace());
+ if (Vacb->ReferenceCount != 0)
+ {
+ DPRINT1("Invalid free: %ld\n", Vacb->ReferenceCount);
+ if (Vacb->SharedCacheMap->FileObject && Vacb->SharedCacheMap->FileObject->FileName.Length)
+ {
+ DPRINT1("For file: %wZ\n", &Vacb->SharedCacheMap->FileObject->FileName);
+ }
+ }
+
+ ASSERT(Vacb->ReferenceCount == 0);
+ ASSERT(IsListEmpty(&Vacb->CacheMapVacbListEntry));
+ ASSERT(IsListEmpty(&Vacb->DirtyVacbListEntry));
+ ASSERT(IsListEmpty(&Vacb->VacbLruListEntry));
+ RtlFillMemory(Vacb, sizeof(*Vacb), 0xfd);
ExFreeToNPagedLookasideList(&VacbLookasideList, Vacb);
return STATUS_SUCCESS;
}
LONGLONG RemainingLength;
PROS_VACB current;
NTSTATUS Status;
- KIRQL oldIrql;
+
+ CCTRACE(CC_API_DEBUG, "SectionObjectPointers=%p FileOffset=%p Length=%lu\n",
+ SectionObjectPointers, FileOffset, Length);
DPRINT("CcFlushCache(SectionObjectPointers 0x%p, FileOffset 0x%p, Length %lu, IoStatus 0x%p)\n",
SectionObjectPointers, FileOffset, Length, IoStatus);
IoStatus->Status = Status;
}
}
- KeReleaseMutex(¤t->Mutex, FALSE);
- KeAcquireGuardedMutex(&ViewLock);
- KeAcquireSpinLock(&SharedCacheMap->CacheMapLock, &oldIrql);
- CcRosVacbDecRefCount(current);
- KeReleaseSpinLock(&SharedCacheMap->CacheMapLock, oldIrql);
- KeReleaseGuardedMutex(&ViewLock);
+ CcRosReleaseVacb(SharedCacheMap, current, current->Valid, current->Dirty, FALSE);
}
Offset.QuadPart += VACB_MAPPING_GRANULARITY;
NTAPI
CcRosDeleteFileCache (
PFILE_OBJECT FileObject,
- PROS_SHARED_CACHE_MAP SharedCacheMap)
+ PROS_SHARED_CACHE_MAP SharedCacheMap,
+ PKIRQL OldIrql)
/*
* FUNCTION: Releases the shared cache map associated with a file object
*/
PLIST_ENTRY current_entry;
PROS_VACB current;
LIST_ENTRY FreeList;
- KIRQL oldIrql;
ASSERT(SharedCacheMap);
- SharedCacheMap->RefCount++;
- KeReleaseGuardedMutex(&ViewLock);
+ SharedCacheMap->OpenCount++;
+ KeReleaseQueuedSpinLock(LockQueueMasterLock, *OldIrql);
CcFlushCache(FileObject->SectionObjectPointer, NULL, 0, NULL);
- KeAcquireGuardedMutex(&ViewLock);
- SharedCacheMap->RefCount--;
- if (SharedCacheMap->RefCount == 0)
+ *OldIrql = KeAcquireQueuedSpinLock(LockQueueMasterLock);
+ SharedCacheMap->OpenCount--;
+ if (SharedCacheMap->OpenCount == 0)
{
FileObject->SectionObjectPointer->SharedCacheMap = NULL;
* Release all VACBs
*/
InitializeListHead(&FreeList);
- KeAcquireSpinLock(&SharedCacheMap->CacheMapLock, &oldIrql);
+ KeAcquireSpinLockAtDpcLevel(&SharedCacheMap->CacheMapLock);
while (!IsListEmpty(&SharedCacheMap->CacheMapVacbListHead))
{
current_entry = RemoveTailList(&SharedCacheMap->CacheMapVacbListHead);
+ KeReleaseSpinLockFromDpcLevel(&SharedCacheMap->CacheMapLock);
+
current = CONTAINING_RECORD(current_entry, ROS_VACB, CacheMapVacbListEntry);
RemoveEntryList(¤t->VacbLruListEntry);
+ InitializeListHead(¤t->VacbLruListEntry);
if (current->Dirty)
{
- RemoveEntryList(¤t->DirtyVacbListEntry);
- DirtyPageCount -= VACB_MAPPING_GRANULARITY / PAGE_SIZE;
+ KeAcquireSpinLockAtDpcLevel(&SharedCacheMap->CacheMapLock);
+ CcRosUnmarkDirtyVacb(current, FALSE);
+ KeReleaseSpinLockFromDpcLevel(&SharedCacheMap->CacheMapLock);
DPRINT1("Freeing dirty VACB\n");
}
+ if (current->MappedCount != 0)
+ {
+ current->MappedCount = 0;
+ NT_VERIFY(CcRosVacbDecRefCount(current) > 0);
+ DPRINT1("Freeing mapped VACB\n");
+ }
InsertHeadList(&FreeList, ¤t->CacheMapVacbListEntry);
+
+ KeAcquireSpinLockAtDpcLevel(&SharedCacheMap->CacheMapLock);
}
#if DBG
SharedCacheMap->Trace = FALSE;
#endif
- KeReleaseSpinLock(&SharedCacheMap->CacheMapLock, oldIrql);
+ KeReleaseSpinLockFromDpcLevel(&SharedCacheMap->CacheMapLock);
- KeReleaseGuardedMutex(&ViewLock);
+ KeReleaseQueuedSpinLock(LockQueueMasterLock, *OldIrql);
ObDereferenceObject(SharedCacheMap->FileObject);
while (!IsListEmpty(&FreeList))
{
+ ULONG Refs;
+
current_entry = RemoveTailList(&FreeList);
current = CONTAINING_RECORD(current_entry, ROS_VACB, CacheMapVacbListEntry);
- CcRosInternalFreeVacb(current);
+ InitializeListHead(¤t->CacheMapVacbListEntry);
+ Refs = CcRosVacbDecRefCount(current);
+#if DBG // CORE-14578
+ if (Refs != 0)
+ {
+ DPRINT1("Leaking VACB %p attached to %p (%I64d)\n", current, FileObject, current->FileOffset.QuadPart);
+ DPRINT1("There are: %d references left\n", Refs);
+ DPRINT1("Map: %d\n", current->MappedCount);
+ DPRINT1("Dirty: %d\n", current->Dirty);
+ if (FileObject->FileName.Length != 0)
+ {
+ DPRINT1("File was: %wZ\n", &FileObject->FileName);
+ }
+ else if (FileObject->FsContext != NULL &&
+ ((PFSRTL_COMMON_FCB_HEADER)(FileObject->FsContext))->NodeTypeCode == 0x0502 &&
+ ((PFSRTL_COMMON_FCB_HEADER)(FileObject->FsContext))->NodeByteSize == 0x1F8 &&
+ ((PUNICODE_STRING)(((PUCHAR)FileObject->FsContext) + 0x100))->Length != 0)
+ {
+ DPRINT1("File was: %wZ (FastFAT)\n", (PUNICODE_STRING)(((PUCHAR)FileObject->FsContext) + 0x100));
+ }
+ else
+ {
+ DPRINT1("No name for the file\n");
+ }
+ }
+#else
+ ASSERT(Refs == 0);
+#endif
}
+
+ *OldIrql = KeAcquireQueuedSpinLock(LockQueueMasterLock);
+ RemoveEntryList(&SharedCacheMap->SharedCacheMapLinks);
+ KeReleaseQueuedSpinLock(LockQueueMasterLock, *OldIrql);
+
ExFreeToNPagedLookasideList(&SharedCacheMapLookasideList, SharedCacheMap);
- KeAcquireGuardedMutex(&ViewLock);
+ *OldIrql = KeAcquireQueuedSpinLock(LockQueueMasterLock);
}
return STATUS_SUCCESS;
}
PFILE_OBJECT FileObject)
{
PROS_SHARED_CACHE_MAP SharedCacheMap;
- KeAcquireGuardedMutex(&ViewLock);
+ KIRQL OldIrql;
+
+ OldIrql = KeAcquireQueuedSpinLock(LockQueueMasterLock);
SharedCacheMap = FileObject->SectionObjectPointer->SharedCacheMap;
ASSERT(SharedCacheMap);
- ASSERT(SharedCacheMap->RefCount != 0);
- SharedCacheMap->RefCount++;
- KeReleaseGuardedMutex(&ViewLock);
+ ASSERT(SharedCacheMap->OpenCount != 0);
+ SharedCacheMap->OpenCount++;
+ KeReleaseQueuedSpinLock(LockQueueMasterLock, OldIrql);
}
VOID
PSECTION_OBJECT_POINTERS SectionObjectPointer)
{
PROS_SHARED_CACHE_MAP SharedCacheMap;
+ KIRQL OldIrql;
+
DPRINT("CcRosRemoveIfClosed()\n");
- KeAcquireGuardedMutex(&ViewLock);
+ OldIrql = KeAcquireQueuedSpinLock(LockQueueMasterLock);
SharedCacheMap = SectionObjectPointer->SharedCacheMap;
- if (SharedCacheMap && SharedCacheMap->RefCount == 0)
+ if (SharedCacheMap && SharedCacheMap->OpenCount == 0)
{
- CcRosDeleteFileCache(SharedCacheMap->FileObject, SharedCacheMap);
+ CcRosDeleteFileCache(SharedCacheMap->FileObject, SharedCacheMap, &OldIrql);
}
- KeReleaseGuardedMutex(&ViewLock);
+ KeReleaseQueuedSpinLock(LockQueueMasterLock, OldIrql);
}
PFILE_OBJECT FileObject)
{
PROS_SHARED_CACHE_MAP SharedCacheMap;
- KeAcquireGuardedMutex(&ViewLock);
+ KIRQL OldIrql;
+
+ OldIrql = KeAcquireQueuedSpinLock(LockQueueMasterLock);
SharedCacheMap = FileObject->SectionObjectPointer->SharedCacheMap;
ASSERT(SharedCacheMap);
- if (SharedCacheMap->RefCount > 0)
+ if (SharedCacheMap->OpenCount > 0)
{
- SharedCacheMap->RefCount--;
- if (SharedCacheMap->RefCount == 0)
+ SharedCacheMap->OpenCount--;
+ if (SharedCacheMap->OpenCount == 0)
{
+ KeReleaseQueuedSpinLock(LockQueueMasterLock, OldIrql);
MmFreeSectionSegments(SharedCacheMap->FileObject);
- CcRosDeleteFileCache(FileObject, SharedCacheMap);
+
+ OldIrql = KeAcquireQueuedSpinLock(LockQueueMasterLock);
+ CcRosDeleteFileCache(FileObject, SharedCacheMap, &OldIrql);
+ KeReleaseQueuedSpinLock(LockQueueMasterLock, OldIrql);
+
+ return;
}
}
- KeReleaseGuardedMutex(&ViewLock);
+ KeReleaseQueuedSpinLock(LockQueueMasterLock, OldIrql);
}
NTSTATUS
* has been closed.
*/
{
+ KIRQL OldIrql;
+ PPRIVATE_CACHE_MAP PrivateMap;
PROS_SHARED_CACHE_MAP SharedCacheMap;
- KeAcquireGuardedMutex(&ViewLock);
+ OldIrql = KeAcquireQueuedSpinLock(LockQueueMasterLock);
if (FileObject->SectionObjectPointer->SharedCacheMap != NULL)
{
SharedCacheMap = FileObject->SectionObjectPointer->SharedCacheMap;
- if (FileObject->PrivateCacheMap != NULL)
+
+ /* Closing the handle, so kill the private cache map
+ * Before you event try to remove it from FO, always
+ * lock the master lock, to be sure not to race
+ * with a potential read ahead ongoing!
+ */
+ PrivateMap = FileObject->PrivateCacheMap;
+ FileObject->PrivateCacheMap = NULL;
+
+ if (PrivateMap != NULL)
{
- FileObject->PrivateCacheMap = NULL;
- if (SharedCacheMap->RefCount > 0)
+ /* Remove it from the file */
+ KeAcquireSpinLockAtDpcLevel(&SharedCacheMap->CacheMapLock);
+ RemoveEntryList(&PrivateMap->PrivateLinks);
+ KeReleaseSpinLockFromDpcLevel(&SharedCacheMap->CacheMapLock);
+
+ /* And free it. */
+ if (PrivateMap != &SharedCacheMap->PrivateCacheMap)
+ {
+ ExFreePoolWithTag(PrivateMap, TAG_PRIVATE_CACHE_MAP);
+ }
+ else
{
- SharedCacheMap->RefCount--;
- if (SharedCacheMap->RefCount == 0)
+ PrivateMap->NodeTypeCode = 0;
+ }
+
+ if (SharedCacheMap->OpenCount > 0)
+ {
+ SharedCacheMap->OpenCount--;
+ if (SharedCacheMap->OpenCount == 0)
{
+ KeReleaseQueuedSpinLock(LockQueueMasterLock, OldIrql);
MmFreeSectionSegments(SharedCacheMap->FileObject);
- CcRosDeleteFileCache(FileObject, SharedCacheMap);
+
+ OldIrql = KeAcquireQueuedSpinLock(LockQueueMasterLock);
+ CcRosDeleteFileCache(FileObject, SharedCacheMap, &OldIrql);
+ KeReleaseQueuedSpinLock(LockQueueMasterLock, OldIrql);
+
+ return STATUS_SUCCESS;
}
}
}
}
- KeReleaseGuardedMutex(&ViewLock);
+ KeReleaseQueuedSpinLock(LockQueueMasterLock, OldIrql);
return STATUS_SUCCESS;
}
-NTSTATUS
-NTAPI
-CcTryToInitializeFileCache (
- PFILE_OBJECT FileObject)
-{
- PROS_SHARED_CACHE_MAP SharedCacheMap;
- NTSTATUS Status;
-
- KeAcquireGuardedMutex(&ViewLock);
-
- ASSERT(FileObject->SectionObjectPointer);
- SharedCacheMap = FileObject->SectionObjectPointer->SharedCacheMap;
- if (SharedCacheMap == NULL)
- {
- Status = STATUS_UNSUCCESSFUL;
- }
- else
- {
- if (FileObject->PrivateCacheMap == NULL)
- {
- FileObject->PrivateCacheMap = SharedCacheMap;
- SharedCacheMap->RefCount++;
- }
- Status = STATUS_SUCCESS;
- }
- KeReleaseGuardedMutex(&ViewLock);
-
- return Status;
-}
-
-
NTSTATUS
NTAPI
CcRosInitializeFileCache (
PFILE_OBJECT FileObject,
PCC_FILE_SIZES FileSizes,
+ BOOLEAN PinAccess,
PCACHE_MANAGER_CALLBACKS CallBacks,
PVOID LazyWriterContext)
/*
* FUNCTION: Initializes a shared cache map for a file object
*/
{
+ KIRQL OldIrql;
+ BOOLEAN Allocated;
PROS_SHARED_CACHE_MAP SharedCacheMap;
- SharedCacheMap = FileObject->SectionObjectPointer->SharedCacheMap;
- DPRINT("CcRosInitializeFileCache(FileObject 0x%p, SharedCacheMap 0x%p)\n",
- FileObject, SharedCacheMap);
+ DPRINT("CcRosInitializeFileCache(FileObject 0x%p)\n", FileObject);
- KeAcquireGuardedMutex(&ViewLock);
+ Allocated = FALSE;
+ SharedCacheMap = FileObject->SectionObjectPointer->SharedCacheMap;
if (SharedCacheMap == NULL)
{
+ Allocated = TRUE;
SharedCacheMap = ExAllocateFromNPagedLookasideList(&SharedCacheMapLookasideList);
if (SharedCacheMap == NULL)
{
- KeReleaseGuardedMutex(&ViewLock);
- return STATUS_UNSUCCESSFUL;
+ return STATUS_INSUFFICIENT_RESOURCES;
}
RtlZeroMemory(SharedCacheMap, sizeof(*SharedCacheMap));
- ObReferenceObjectByPointer(FileObject,
- FILE_ALL_ACCESS,
- NULL,
- KernelMode);
+ SharedCacheMap->NodeTypeCode = NODE_TYPE_SHARED_MAP;
+ SharedCacheMap->NodeByteSize = sizeof(*SharedCacheMap);
SharedCacheMap->FileObject = FileObject;
SharedCacheMap->Callbacks = CallBacks;
SharedCacheMap->LazyWriteContext = LazyWriterContext;
SharedCacheMap->SectionSize = FileSizes->AllocationSize;
SharedCacheMap->FileSize = FileSizes->FileSize;
+ SharedCacheMap->PinAccess = PinAccess;
+ SharedCacheMap->DirtyPageThreshold = 0;
+ SharedCacheMap->DirtyPages = 0;
+ InitializeListHead(&SharedCacheMap->PrivateList);
KeInitializeSpinLock(&SharedCacheMap->CacheMapLock);
InitializeListHead(&SharedCacheMap->CacheMapVacbListHead);
- FileObject->SectionObjectPointer->SharedCacheMap = SharedCacheMap;
+ InitializeListHead(&SharedCacheMap->BcbList);
+ }
+
+ OldIrql = KeAcquireQueuedSpinLock(LockQueueMasterLock);
+ if (Allocated)
+ {
+ if (FileObject->SectionObjectPointer->SharedCacheMap == NULL)
+ {
+ ObReferenceObjectByPointer(FileObject,
+ FILE_ALL_ACCESS,
+ NULL,
+ KernelMode);
+ FileObject->SectionObjectPointer->SharedCacheMap = SharedCacheMap;
+
+ InsertTailList(&CcCleanSharedCacheMapList, &SharedCacheMap->SharedCacheMapLinks);
+ }
+ else
+ {
+ ExFreeToNPagedLookasideList(&SharedCacheMapLookasideList, SharedCacheMap);
+ SharedCacheMap = FileObject->SectionObjectPointer->SharedCacheMap;
+ }
}
if (FileObject->PrivateCacheMap == NULL)
{
- FileObject->PrivateCacheMap = SharedCacheMap;
- SharedCacheMap->RefCount++;
+ PPRIVATE_CACHE_MAP PrivateMap;
+
+ /* Allocate the private cache map for this handle */
+ if (SharedCacheMap->PrivateCacheMap.NodeTypeCode != 0)
+ {
+ PrivateMap = ExAllocatePoolWithTag(NonPagedPool, sizeof(PRIVATE_CACHE_MAP), TAG_PRIVATE_CACHE_MAP);
+ }
+ else
+ {
+ PrivateMap = &SharedCacheMap->PrivateCacheMap;
+ }
+
+ if (PrivateMap == NULL)
+ {
+ /* If we also allocated the shared cache map for this file, kill it */
+ if (Allocated)
+ {
+ RemoveEntryList(&SharedCacheMap->SharedCacheMapLinks);
+
+ FileObject->SectionObjectPointer->SharedCacheMap = NULL;
+ ObDereferenceObject(FileObject);
+ ExFreeToNPagedLookasideList(&SharedCacheMapLookasideList, SharedCacheMap);
+ }
+
+ KeReleaseQueuedSpinLock(LockQueueMasterLock, OldIrql);
+ return STATUS_INSUFFICIENT_RESOURCES;
+ }
+
+ /* Initialize it */
+ RtlZeroMemory(PrivateMap, sizeof(PRIVATE_CACHE_MAP));
+ PrivateMap->NodeTypeCode = NODE_TYPE_PRIVATE_MAP;
+ PrivateMap->ReadAheadMask = PAGE_SIZE - 1;
+ PrivateMap->FileObject = FileObject;
+ KeInitializeSpinLock(&PrivateMap->ReadAheadSpinLock);
+
+ /* Link it to the file */
+ KeAcquireSpinLockAtDpcLevel(&SharedCacheMap->CacheMapLock);
+ InsertTailList(&SharedCacheMap->PrivateList, &PrivateMap->PrivateLinks);
+ KeReleaseSpinLockFromDpcLevel(&SharedCacheMap->CacheMapLock);
+
+ FileObject->PrivateCacheMap = PrivateMap;
+ SharedCacheMap->OpenCount++;
}
- KeReleaseGuardedMutex(&ViewLock);
+ KeReleaseQueuedSpinLock(LockQueueMasterLock, OldIrql);
return STATUS_SUCCESS;
}
IN PSECTION_OBJECT_POINTERS SectionObjectPointers)
{
PROS_SHARED_CACHE_MAP SharedCacheMap;
+
+ CCTRACE(CC_API_DEBUG, "SectionObjectPointers=%p\n", SectionObjectPointers);
+
if (SectionObjectPointers && SectionObjectPointers->SharedCacheMap)
{
SharedCacheMap = SectionObjectPointers->SharedCacheMap;
InitializeListHead(&DirtyVacbListHead);
InitializeListHead(&VacbLruListHead);
- KeInitializeGuardedMutex(&ViewLock);
+ InitializeListHead(&CcDeferredWrites);
+ InitializeListHead(&CcCleanSharedCacheMapList);
+ KeInitializeSpinLock(&CcDeferredWriteSpinLock);
ExInitializeNPagedLookasideList(&iBcbLookasideList,
NULL,
NULL,
CcInitCacheZeroPage();
}
+#if DBG && defined(KDBG)
+BOOLEAN
+ExpKdbgExtFileCache(ULONG Argc, PCHAR Argv[])
+{
+ PLIST_ENTRY ListEntry;
+ UNICODE_STRING NoName = RTL_CONSTANT_STRING(L"No name for File");
+
+ KdbpPrint(" Usage Summary (in kb)\n");
+ KdbpPrint("Shared\t\tValid\tDirty\tName\n");
+ /* No need to lock the spin lock here, we're in DBG */
+ for (ListEntry = CcCleanSharedCacheMapList.Flink;
+ ListEntry != &CcCleanSharedCacheMapList;
+ ListEntry = ListEntry->Flink)
+ {
+ PLIST_ENTRY Vacbs;
+ ULONG Valid = 0, Dirty = 0;
+ PROS_SHARED_CACHE_MAP SharedCacheMap;
+ PUNICODE_STRING FileName;
+ PWSTR Extra = L"";
+
+ SharedCacheMap = CONTAINING_RECORD(ListEntry, ROS_SHARED_CACHE_MAP, SharedCacheMapLinks);
+
+ /* Dirty size */
+ Dirty = (SharedCacheMap->DirtyPages * PAGE_SIZE) / 1024;
+
+ /* First, count for all the associated VACB */
+ for (Vacbs = SharedCacheMap->CacheMapVacbListHead.Flink;
+ Vacbs != &SharedCacheMap->CacheMapVacbListHead;
+ Vacbs = Vacbs->Flink)
+ {
+ PROS_VACB Vacb;
+
+ Vacb = CONTAINING_RECORD(Vacbs, ROS_VACB, CacheMapVacbListEntry);
+ if (Vacb->Valid)
+ {
+ Valid += VACB_MAPPING_GRANULARITY / 1024;
+ }
+ }
+
+ /* Setup name */
+ if (SharedCacheMap->FileObject != NULL &&
+ SharedCacheMap->FileObject->FileName.Length != 0)
+ {
+ FileName = &SharedCacheMap->FileObject->FileName;
+ }
+ else if (SharedCacheMap->FileObject != NULL &&
+ SharedCacheMap->FileObject->FsContext != NULL &&
+ ((PFSRTL_COMMON_FCB_HEADER)(SharedCacheMap->FileObject->FsContext))->NodeTypeCode == 0x0502 &&
+ ((PFSRTL_COMMON_FCB_HEADER)(SharedCacheMap->FileObject->FsContext))->NodeByteSize == 0x1F8 &&
+ ((PUNICODE_STRING)(((PUCHAR)SharedCacheMap->FileObject->FsContext) + 0x100))->Length != 0)
+ {
+ FileName = (PUNICODE_STRING)(((PUCHAR)SharedCacheMap->FileObject->FsContext) + 0x100);
+ Extra = L" (FastFAT)";
+ }
+ else
+ {
+ FileName = &NoName;
+ }
+
+ /* And print */
+ KdbpPrint("%p\t%d\t%d\t%wZ%S\n", SharedCacheMap, Valid, Dirty, FileName, Extra);
+ }
+
+ return TRUE;
+}
+
+BOOLEAN
+ExpKdbgExtDefWrites(ULONG Argc, PCHAR Argv[])
+{
+ KdbpPrint("CcTotalDirtyPages:\t%lu (%lu Kb)\n", CcTotalDirtyPages,
+ (CcTotalDirtyPages * PAGE_SIZE) / 1024);
+ KdbpPrint("CcDirtyPageThreshold:\t%lu (%lu Kb)\n", CcDirtyPageThreshold,
+ (CcDirtyPageThreshold * PAGE_SIZE) / 1024);
+ KdbpPrint("MmAvailablePages:\t%lu (%lu Kb)\n", MmAvailablePages,
+ (MmAvailablePages * PAGE_SIZE) / 1024);
+ KdbpPrint("MmThrottleTop:\t\t%lu (%lu Kb)\n", MmThrottleTop,
+ (MmThrottleTop * PAGE_SIZE) / 1024);
+ KdbpPrint("MmThrottleBottom:\t%lu (%lu Kb)\n", MmThrottleBottom,
+ (MmThrottleBottom * PAGE_SIZE) / 1024);
+ KdbpPrint("MmModifiedPageListHead.Total:\t%lu (%lu Kb)\n", MmModifiedPageListHead.Total,
+ (MmModifiedPageListHead.Total * PAGE_SIZE) / 1024);
+
+ if (CcTotalDirtyPages >= CcDirtyPageThreshold)
+ {
+ KdbpPrint("CcTotalDirtyPages above the threshold, writes should be throttled\n");
+ }
+ else if (CcTotalDirtyPages + 64 >= CcDirtyPageThreshold)
+ {
+ KdbpPrint("CcTotalDirtyPages within 64 (max charge) pages of the threshold, writes may be throttled\n");
+ }
+ else
+ {
+ KdbpPrint("CcTotalDirtyPages below the threshold, writes should not be throttled\n");
+ }
+
+ return TRUE;
+}
+#endif
+
/* EOF */
projects / reactos.git / blobdiff