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 #if defined(ALLOC_PRAGMA)
  35 #pragma alloc_text(INIT, DriverEntry)
  36 #endif
  37
  38 /* GLOBALS *****************************************************************/
  39
  40 PVFAT_GLOBAL_DATA VfatGlobalData;
  41
  42 /* FUNCTIONS ****************************************************************/
  43
  44 /*
  45  * FUNCTION: Called by the system to initialize the driver
  46  * ARGUMENTS:
  47  *           DriverObject = object describing this driver
  48  *           RegistryPath = path to our configuration entries
  49  * RETURNS: Success or failure
  50  */
  51 INIT_FUNCTION
  52 NTSTATUS
  53 NTAPI
  54 DriverEntry(
  55     IN PDRIVER_OBJECT DriverObject,
  56     IN PUNICODE_STRING RegistryPath)
  57 {
  58     PDEVICE_OBJECT DeviceObject;
  59     UNICODE_STRING DeviceName = RTL_CONSTANT_STRING(L"\\Fat");
  60     NTSTATUS Status;
  61
  62     UNREFERENCED_PARAMETER(RegistryPath);
  63
  64     Status = IoCreateDevice(DriverObject,
  65                             sizeof(VFAT_GLOBAL_DATA),
  66                             &DeviceName,
  67                             FILE_DEVICE_DISK_FILE_SYSTEM,
  68                             0,
  69                             FALSE,
  70                             &DeviceObject);
  71     if (Status == STATUS_OBJECT_NAME_EXISTS ||
  72        Status == STATUS_OBJECT_NAME_COLLISION)
  73     {
  74         /* Try an other name, if 'Fat' is already in use. 'Fat' is also used by fastfat.sys on W2K */
  75         RtlInitUnicodeString(&DeviceName, L"\\RosFat");
  76         Status = IoCreateDevice(DriverObject,
  77                                 sizeof(VFAT_GLOBAL_DATA),
  78                                 &DeviceName,
  79                                 FILE_DEVICE_DISK_FILE_SYSTEM,
  80                                 0,
  81                                 FALSE,
  82                                 &DeviceObject);
  83     }
  84
  85     if (!NT_SUCCESS(Status))
  86     {
  87         return Status;
  88     }
  89
  90     VfatGlobalData = DeviceObject->DeviceExtension;
  91     RtlZeroMemory (VfatGlobalData, sizeof(VFAT_GLOBAL_DATA));
  92     VfatGlobalData->DriverObject = DriverObject;
  93     VfatGlobalData->DeviceObject = DeviceObject;
  94     VfatGlobalData->NumberProcessors = KeNumberProcessors;
  95     /* Enable this to enter the debugger when file system corruption
  96      * has been detected:
  97     VfatGlobalData->Flags = VFAT_BREAK_ON_CORRUPTION; */
  98
  99     /* Delayed close support */
 100     ExInitializeFastMutex(&VfatGlobalData->CloseMutex);
 101     InitializeListHead(&VfatGlobalData->CloseListHead);
 102     VfatGlobalData->CloseCount = 0;
 103     VfatGlobalData->CloseWorkerRunning = FALSE;
 104     VfatGlobalData->ShutdownStarted = FALSE;
 105     VfatGlobalData->CloseWorkItem = IoAllocateWorkItem(DeviceObject);
 106     if (VfatGlobalData->CloseWorkItem == NULL)
 107     {
 108         IoDeleteDevice(DeviceObject);
 109         return STATUS_INSUFFICIENT_RESOURCES;
 110     }
 111
 112     DeviceObject->Flags |= DO_DIRECT_IO;
 113     DriverObject->MajorFunction[IRP_MJ_CLOSE] = VfatBuildRequest;
 114     DriverObject->MajorFunction[IRP_MJ_CREATE] = VfatBuildRequest;
 115     DriverObject->MajorFunction[IRP_MJ_READ] = VfatBuildRequest;
 116     DriverObject->MajorFunction[IRP_MJ_WRITE] = VfatBuildRequest;
 117     DriverObject->MajorFunction[IRP_MJ_FILE_SYSTEM_CONTROL] = VfatBuildRequest;
 118     DriverObject->MajorFunction[IRP_MJ_QUERY_INFORMATION] = VfatBuildRequest;
 119     DriverObject->MajorFunction[IRP_MJ_SET_INFORMATION] = VfatBuildRequest;
 120     DriverObject->MajorFunction[IRP_MJ_DIRECTORY_CONTROL] = VfatBuildRequest;
 121     DriverObject->MajorFunction[IRP_MJ_QUERY_VOLUME_INFORMATION] = VfatBuildRequest;
 122     DriverObject->MajorFunction[IRP_MJ_SET_VOLUME_INFORMATION] = VfatBuildRequest;
 123     DriverObject->MajorFunction[IRP_MJ_SHUTDOWN] = VfatShutdown;
 124     DriverObject->MajorFunction[IRP_MJ_LOCK_CONTROL] = VfatBuildRequest;
 125     DriverObject->MajorFunction[IRP_MJ_DEVICE_CONTROL] = VfatBuildRequest;
 126     DriverObject->MajorFunction[IRP_MJ_CLEANUP] = VfatBuildRequest;
 127     DriverObject->MajorFunction[IRP_MJ_FLUSH_BUFFERS] = VfatBuildRequest;
 128     DriverObject->MajorFunction[IRP_MJ_PNP] = VfatBuildRequest;
 129
 130     DriverObject->DriverUnload = NULL;
 131
 132     /* Cache manager */
 133     VfatGlobalData->CacheMgrCallbacks.AcquireForLazyWrite = VfatAcquireForLazyWrite;
 134     VfatGlobalData->CacheMgrCallbacks.ReleaseFromLazyWrite = VfatReleaseFromLazyWrite;
 135     VfatGlobalData->CacheMgrCallbacks.AcquireForReadAhead = VfatAcquireForLazyWrite;
 136     VfatGlobalData->CacheMgrCallbacks.ReleaseFromReadAhead = VfatReleaseFromLazyWrite;
 137
 138     /* Fast I/O */
 139     VfatInitFastIoRoutines(&VfatGlobalData->FastIoDispatch);
 140     DriverObject->FastIoDispatch = &VfatGlobalData->FastIoDispatch;
 141
 142     /* Private lists */
 143     ExInitializeNPagedLookasideList(&VfatGlobalData->FcbLookasideList,
 144                                     NULL, NULL, 0, sizeof(VFATFCB), TAG_FCB, 0);
 145     ExInitializeNPagedLookasideList(&VfatGlobalData->CcbLookasideList,
 146                                     NULL, NULL, 0, sizeof(VFATCCB), TAG_CCB, 0);
 147     ExInitializeNPagedLookasideList(&VfatGlobalData->IrpContextLookasideList,
 148                                     NULL, NULL, 0, sizeof(VFAT_IRP_CONTEXT), TAG_IRP, 0);
 149     ExInitializePagedLookasideList(&VfatGlobalData->CloseContextLookasideList,
 150                                    NULL, NULL, 0, sizeof(VFAT_CLOSE_CONTEXT), TAG_CLOSE, 0);
 151
 152     ExInitializeResourceLite(&VfatGlobalData->VolumeListLock);
 153     InitializeListHead(&VfatGlobalData->VolumeListHead);
 154     IoRegisterFileSystem(DeviceObject);
 155
 156 #ifdef KDBG
 157     {
 158         BOOLEAN Registered;
 159
 160         Registered = KdRosRegisterCliCallback(vfatKdbgHandler);
 161         DPRINT1("FastFAT KDBG extension registered: %s\n", (Registered ? "yes" : "no"));
 162     }
 163 #endif
 164
 165     return STATUS_SUCCESS;
 166 }
 167
 168 /* EOF */