drivers/filesystems/fastfat/iface.c

   1 /*
   2  *  ReactOS kernel
   3  *  Copyright (C) 1998, 1999, 2000, 2001 ReactOS Team
   4  *
   5  *  This program is free software; you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation; either version 2 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License along
  16  *  with this program; if not, write to the Free Software Foundation, Inc.,
  17  *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18  */
  19 /*
  20  * PROJECT:          ReactOS kernel
  21  * FILE:             drivers/fs/vfat/iface.c
  22  * PURPOSE:          VFAT Filesystem
  23  * PROGRAMMER:       Jason Filby (jasonfilby@yahoo.com)
  24  *                   Pierre Schweitzer (pierre@reactos.org)
  25  */
  26
  27 /* INCLUDES *****************************************************************/
  28
  29 #include "vfat.h"
  30
  31 #define NDEBUG
  32 #include <debug.h>
  33
  34 /* GLOBALS *****************************************************************/
  35
  36 PVFAT_GLOBAL_DATA VfatGlobalData;
  37
  38 /* FUNCTIONS ****************************************************************/
  39
  40 /*
  41  * FUNCTION: Called by the system to initialize the driver
  42  * ARGUMENTS:
  43  *           DriverObject = object describing this driver
  44  *           RegistryPath = path to our configuration entries
  45  * RETURNS: Success or failure
  46  */
  47 CODE_SEG("INIT")
  48 NTSTATUS
  49 NTAPI
  50 DriverEntry(
  51     IN PDRIVER_OBJECT DriverObject,
  52     IN PUNICODE_STRING RegistryPath)
  53 {
  54     PDEVICE_OBJECT DeviceObject;
  55     UNICODE_STRING DeviceName = RTL_CONSTANT_STRING(L"\\Fat");
  56     NTSTATUS Status;
  57
  58     UNREFERENCED_PARAMETER(RegistryPath);
  59
  60     Status = IoCreateDevice(DriverObject,
  61                             sizeof(VFAT_GLOBAL_DATA),
  62                             &DeviceName,
  63                             FILE_DEVICE_DISK_FILE_SYSTEM,
  64                             0,
  65                             FALSE,
  66                             &DeviceObject);
  67     if (Status == STATUS_OBJECT_NAME_EXISTS ||
  68        Status == STATUS_OBJECT_NAME_COLLISION)
  69     {
  70         /* Try an other name, if 'Fat' is already in use. 'Fat' is also used by fastfat.sys on W2K */
  71         RtlInitUnicodeString(&DeviceName, L"\\RosFat");
  72         Status = IoCreateDevice(DriverObject,
  73                                 sizeof(VFAT_GLOBAL_DATA),
  74                                 &DeviceName,
  75                                 FILE_DEVICE_DISK_FILE_SYSTEM,
  76                                 0,
  77                                 FALSE,
  78                                 &DeviceObject);
  79     }
  80
  81     if (!NT_SUCCESS(Status))
  82     {
  83         return Status;
  84     }
  85
  86     VfatGlobalData = DeviceObject->DeviceExtension;
  87     RtlZeroMemory (VfatGlobalData, sizeof(VFAT_GLOBAL_DATA));
  88     VfatGlobalData->DriverObject = DriverObject;
  89     VfatGlobalData->DeviceObject = DeviceObject;
  90     VfatGlobalData->NumberProcessors = KeNumberProcessors;
  91     /* Enable this to enter the debugger when file system corruption
  92      * has been detected:
  93     VfatGlobalData->Flags = VFAT_BREAK_ON_CORRUPTION; */
  94
  95     /* Delayed close support */
  96     ExInitializeFastMutex(&VfatGlobalData->CloseMutex);
  97     InitializeListHead(&VfatGlobalData->CloseListHead);
  98     VfatGlobalData->CloseCount = 0;
  99     VfatGlobalData->CloseWorkerRunning = FALSE;
 100     VfatGlobalData->ShutdownStarted = FALSE;
 101     VfatGlobalData->CloseWorkItem = IoAllocateWorkItem(DeviceObject);
 102     if (VfatGlobalData->CloseWorkItem == NULL)
 103     {
 104         IoDeleteDevice(DeviceObject);
 105         return STATUS_INSUFFICIENT_RESOURCES;
 106     }
 107
 108     DeviceObject->Flags |= DO_DIRECT_IO;
 109     DriverObject->MajorFunction[IRP_MJ_CLOSE] = VfatBuildRequest;
 110     DriverObject->MajorFunction[IRP_MJ_CREATE] = VfatBuildRequest;
 111     DriverObject->MajorFunction[IRP_MJ_READ] = VfatBuildRequest;
 112     DriverObject->MajorFunction[IRP_MJ_WRITE] = VfatBuildRequest;
 113     DriverObject->MajorFunction[IRP_MJ_FILE_SYSTEM_CONTROL] = VfatBuildRequest;
 114     DriverObject->MajorFunction[IRP_MJ_QUERY_INFORMATION] = VfatBuildRequest;
 115     DriverObject->MajorFunction[IRP_MJ_SET_INFORMATION] = VfatBuildRequest;
 116     DriverObject->MajorFunction[IRP_MJ_DIRECTORY_CONTROL] = VfatBuildRequest;
 117     DriverObject->MajorFunction[IRP_MJ_QUERY_VOLUME_INFORMATION] = VfatBuildRequest;
 118     DriverObject->MajorFunction[IRP_MJ_SET_VOLUME_INFORMATION] = VfatBuildRequest;
 119     DriverObject->MajorFunction[IRP_MJ_SHUTDOWN] = VfatShutdown;
 120     DriverObject->MajorFunction[IRP_MJ_LOCK_CONTROL] = VfatBuildRequest;
 121     DriverObject->MajorFunction[IRP_MJ_DEVICE_CONTROL] = VfatBuildRequest;
 122     DriverObject->MajorFunction[IRP_MJ_CLEANUP] = VfatBuildRequest;
 123     DriverObject->MajorFunction[IRP_MJ_FLUSH_BUFFERS] = VfatBuildRequest;
 124     DriverObject->MajorFunction[IRP_MJ_PNP] = VfatBuildRequest;
 125
 126     DriverObject->DriverUnload = NULL;
 127
 128     /* Cache manager */
 129     VfatGlobalData->CacheMgrCallbacks.AcquireForLazyWrite = VfatAcquireForLazyWrite;
 130     VfatGlobalData->CacheMgrCallbacks.ReleaseFromLazyWrite = VfatReleaseFromLazyWrite;
 131     VfatGlobalData->CacheMgrCallbacks.AcquireForReadAhead = VfatAcquireForLazyWrite;
 132     VfatGlobalData->CacheMgrCallbacks.ReleaseFromReadAhead = VfatReleaseFromLazyWrite;
 133
 134     /* Fast I/O */
 135     VfatInitFastIoRoutines(&VfatGlobalData->FastIoDispatch);
 136     DriverObject->FastIoDispatch = &VfatGlobalData->FastIoDispatch;
 137
 138     /* Private lists */
 139     ExInitializeNPagedLookasideList(&VfatGlobalData->FcbLookasideList,
 140                                     NULL, NULL, 0, sizeof(VFATFCB), TAG_FCB, 0);
 141     ExInitializeNPagedLookasideList(&VfatGlobalData->CcbLookasideList,
 142                                     NULL, NULL, 0, sizeof(VFATCCB), TAG_CCB, 0);
 143     ExInitializeNPagedLookasideList(&VfatGlobalData->IrpContextLookasideList,
 144                                     NULL, NULL, 0, sizeof(VFAT_IRP_CONTEXT), TAG_IRP, 0);
 145     ExInitializePagedLookasideList(&VfatGlobalData->CloseContextLookasideList,
 146                                    NULL, NULL, 0, sizeof(VFAT_CLOSE_CONTEXT), TAG_CLOSE, 0);
 147
 148     ExInitializeResourceLite(&VfatGlobalData->VolumeListLock);
 149     InitializeListHead(&VfatGlobalData->VolumeListHead);
 150     IoRegisterFileSystem(DeviceObject);
 151
 152 #ifdef KDBG
 153     {
 154         BOOLEAN Registered;
 155
 156         Registered = KdRosRegisterCliCallback(vfatKdbgHandler);
 157         DPRINT1("FastFAT KDBG extension registered: %s\n", (Registered ? "yes" : "no"));
 158     }
 159 #endif
 160
 161     return STATUS_SUCCESS;
 162 }
 163
 164 /* EOF */