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50b00f0fcc
When we're about to close a file (ie, forget everything about it
and release any associated structure), actually delay it.
This allows keep data fresh in memory for faster reuse in case
it would be required. The effective closing will only happen after some time.
For specific operations, this will produce a real speed up in ReactOS.
For instance, with that patch, Winamp starts within seconds, instead of dozen
of minutes.
In most cases, it will bring ReactOS to performances it had before fixing
the huge leak in FastFAT (commit 94ead99) without leaking the whole FS.
For now, due to regressions, this is only activated for files and not
for directories. Once it gets fixed, it will be enabled for both.
CORE-14826
CORE-14917
167 lines
6.5 KiB
C
167 lines
6.5 KiB
C
/*
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* ReactOS kernel
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* Copyright (C) 1998, 1999, 2000, 2001 ReactOS Team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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/*
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* PROJECT: ReactOS kernel
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* FILE: drivers/fs/vfat/iface.c
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* PURPOSE: VFAT Filesystem
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* PROGRAMMER: Jason Filby (jasonfilby@yahoo.com)
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* Pierre Schweitzer (pierre@reactos.org)
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*/
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/* INCLUDES *****************************************************************/
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#include "vfat.h"
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#define NDEBUG
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#include <debug.h>
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#if defined(ALLOC_PRAGMA)
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#pragma alloc_text(INIT, DriverEntry)
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#endif
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/* GLOBALS *****************************************************************/
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PVFAT_GLOBAL_DATA VfatGlobalData;
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/* FUNCTIONS ****************************************************************/
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/*
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* FUNCTION: Called by the system to initialize the driver
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* ARGUMENTS:
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* DriverObject = object describing this driver
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* RegistryPath = path to our configuration entries
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* RETURNS: Success or failure
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*/
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INIT_SECTION
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NTSTATUS
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NTAPI
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DriverEntry(
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IN PDRIVER_OBJECT DriverObject,
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IN PUNICODE_STRING RegistryPath)
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{
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PDEVICE_OBJECT DeviceObject;
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UNICODE_STRING DeviceName = RTL_CONSTANT_STRING(L"\\Fat");
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NTSTATUS Status;
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UNREFERENCED_PARAMETER(RegistryPath);
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Status = IoCreateDevice(DriverObject,
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sizeof(VFAT_GLOBAL_DATA),
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&DeviceName,
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FILE_DEVICE_DISK_FILE_SYSTEM,
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0,
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FALSE,
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&DeviceObject);
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if (Status == STATUS_OBJECT_NAME_EXISTS ||
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Status == STATUS_OBJECT_NAME_COLLISION)
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{
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/* Try an other name, if 'Fat' is already in use. 'Fat' is also used by fastfat.sys on W2K */
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RtlInitUnicodeString(&DeviceName, L"\\RosFat");
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Status = IoCreateDevice(DriverObject,
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sizeof(VFAT_GLOBAL_DATA),
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&DeviceName,
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FILE_DEVICE_DISK_FILE_SYSTEM,
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0,
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FALSE,
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&DeviceObject);
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}
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if (!NT_SUCCESS(Status))
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{
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return Status;
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}
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VfatGlobalData = DeviceObject->DeviceExtension;
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RtlZeroMemory (VfatGlobalData, sizeof(VFAT_GLOBAL_DATA));
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VfatGlobalData->DriverObject = DriverObject;
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VfatGlobalData->DeviceObject = DeviceObject;
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VfatGlobalData->NumberProcessors = KeNumberProcessors;
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/* Enable this to enter the debugger when file system corruption
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* has been detected:
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VfatGlobalData->Flags = VFAT_BREAK_ON_CORRUPTION; */
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/* Delayed close support */
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ExInitializeFastMutex(&VfatGlobalData->CloseMutex);
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InitializeListHead(&VfatGlobalData->CloseListHead);
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VfatGlobalData->CloseCount = 0;
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VfatGlobalData->CloseWorkerRunning = FALSE;
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VfatGlobalData->CloseWorkItem = IoAllocateWorkItem(DeviceObject);
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if (VfatGlobalData->CloseWorkItem == NULL)
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{
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IoDeleteDevice(DeviceObject);
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return STATUS_INSUFFICIENT_RESOURCES;
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}
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DeviceObject->Flags |= DO_DIRECT_IO;
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DriverObject->MajorFunction[IRP_MJ_CLOSE] = VfatBuildRequest;
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DriverObject->MajorFunction[IRP_MJ_CREATE] = VfatBuildRequest;
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DriverObject->MajorFunction[IRP_MJ_READ] = VfatBuildRequest;
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DriverObject->MajorFunction[IRP_MJ_WRITE] = VfatBuildRequest;
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DriverObject->MajorFunction[IRP_MJ_FILE_SYSTEM_CONTROL] = VfatBuildRequest;
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DriverObject->MajorFunction[IRP_MJ_QUERY_INFORMATION] = VfatBuildRequest;
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DriverObject->MajorFunction[IRP_MJ_SET_INFORMATION] = VfatBuildRequest;
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DriverObject->MajorFunction[IRP_MJ_DIRECTORY_CONTROL] = VfatBuildRequest;
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DriverObject->MajorFunction[IRP_MJ_QUERY_VOLUME_INFORMATION] = VfatBuildRequest;
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DriverObject->MajorFunction[IRP_MJ_SET_VOLUME_INFORMATION] = VfatBuildRequest;
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DriverObject->MajorFunction[IRP_MJ_SHUTDOWN] = VfatShutdown;
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DriverObject->MajorFunction[IRP_MJ_LOCK_CONTROL] = VfatBuildRequest;
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DriverObject->MajorFunction[IRP_MJ_DEVICE_CONTROL] = VfatBuildRequest;
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DriverObject->MajorFunction[IRP_MJ_CLEANUP] = VfatBuildRequest;
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DriverObject->MajorFunction[IRP_MJ_FLUSH_BUFFERS] = VfatBuildRequest;
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DriverObject->MajorFunction[IRP_MJ_PNP] = VfatBuildRequest;
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DriverObject->DriverUnload = NULL;
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/* Cache manager */
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VfatGlobalData->CacheMgrCallbacks.AcquireForLazyWrite = VfatAcquireForLazyWrite;
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VfatGlobalData->CacheMgrCallbacks.ReleaseFromLazyWrite = VfatReleaseFromLazyWrite;
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VfatGlobalData->CacheMgrCallbacks.AcquireForReadAhead = VfatAcquireForLazyWrite;
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VfatGlobalData->CacheMgrCallbacks.ReleaseFromReadAhead = VfatReleaseFromLazyWrite;
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/* Fast I/O */
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VfatInitFastIoRoutines(&VfatGlobalData->FastIoDispatch);
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DriverObject->FastIoDispatch = &VfatGlobalData->FastIoDispatch;
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/* Private lists */
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ExInitializeNPagedLookasideList(&VfatGlobalData->FcbLookasideList,
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NULL, NULL, 0, sizeof(VFATFCB), TAG_FCB, 0);
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ExInitializeNPagedLookasideList(&VfatGlobalData->CcbLookasideList,
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NULL, NULL, 0, sizeof(VFATCCB), TAG_CCB, 0);
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ExInitializeNPagedLookasideList(&VfatGlobalData->IrpContextLookasideList,
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NULL, NULL, 0, sizeof(VFAT_IRP_CONTEXT), TAG_IRP, 0);
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ExInitializePagedLookasideList(&VfatGlobalData->CloseContextLookasideList,
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NULL, NULL, 0, sizeof(VFAT_CLOSE_CONTEXT), TAG_CLOSE, 0);
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ExInitializeResourceLite(&VfatGlobalData->VolumeListLock);
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InitializeListHead(&VfatGlobalData->VolumeListHead);
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IoRegisterFileSystem(DeviceObject);
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#ifdef KDBG
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{
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BOOLEAN Registered;
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Registered = KdRosRegisterCliCallback(vfatKdbgHandler);
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DPRINT1("FastFAT KDBG extension registered: %s\n", (Registered ? "yes" : "no"));
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}
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#endif
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return STATUS_SUCCESS;
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}
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/* EOF */
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