reactos/drivers/filesystems/cdfs/cdfs.c

   1 /*
   2  *  ReactOS kernel
   3  *  Copyright (C) 2002, 2003 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  * COPYRIGHT:        See COPYING in the top level directory
  21  * PROJECT:          ReactOS kernel
  22  * FILE:             drivers/fs/cdfs/cdfs.c
  23  * PURPOSE:          CDROM (ISO 9660) filesystem driver
  24  * PROGRAMMER:       Art Yerkes
  25  *                   Eric Kohl
  26  */
  27
  28 /* INCLUDES *****************************************************************/
  29
  30 #include "cdfs.h"
  31
  32 #define NDEBUG
  33 #include <debug.h>
  34
  35 /* GLOBALS ******************************************************************/
  36
  37 PCDFS_GLOBAL_DATA CdfsGlobalData;
  38
  39
  40 /* FUNCTIONS ****************************************************************/
  41
  42 NTSTATUS NTAPI
  43 DriverEntry(PDRIVER_OBJECT DriverObject,
  44             PUNICODE_STRING RegistryPath)
  45             /*
  46             * FUNCTION: Called by the system to initialize the driver
  47             * ARGUMENTS:
  48             *           DriverObject = object describing this driver
  49             *           RegistryPath = path to our configuration entries
  50             * RETURNS: Success or failure
  51             */
  52 {
  53     PDEVICE_OBJECT DeviceObject;
  54     NTSTATUS Status;
  55     UNICODE_STRING DeviceName = RTL_CONSTANT_STRING(L"\\Cdfs");
  56
  57     UNREFERENCED_PARAMETER(RegistryPath);
  58
  59     DPRINT("CDFS 0.0.3\n");
  60
  61     Status = IoCreateDevice(DriverObject,
  62         sizeof(CDFS_GLOBAL_DATA),
  63         &DeviceName,
  64         FILE_DEVICE_CD_ROM_FILE_SYSTEM,
  65         0,
  66         FALSE,
  67         &DeviceObject);
  68     if (!NT_SUCCESS(Status))
  69     {
  70         return(Status);
  71     }
  72
  73     /* Initialize global data */
  74     CdfsGlobalData = DeviceObject->DeviceExtension;
  75     RtlZeroMemory(CdfsGlobalData,
  76         sizeof(CDFS_GLOBAL_DATA));
  77     CdfsGlobalData->DriverObject = DriverObject;
  78     CdfsGlobalData->DeviceObject = DeviceObject;
  79
  80     /* Initialize driver data */
  81     DeviceObject->Flags = DO_DIRECT_IO;
  82     DriverObject->MajorFunction[IRP_MJ_CLOSE] = CdfsClose;
  83     DriverObject->MajorFunction[IRP_MJ_CLEANUP] = CdfsCleanup;
  84     DriverObject->MajorFunction[IRP_MJ_CREATE] = CdfsCreate;
  85     DriverObject->MajorFunction[IRP_MJ_READ] = CdfsRead;
  86     DriverObject->MajorFunction[IRP_MJ_WRITE] = CdfsWrite;
  87     DriverObject->MajorFunction[IRP_MJ_FILE_SYSTEM_CONTROL] =
  88         CdfsFileSystemControl;
  89     DriverObject->MajorFunction[IRP_MJ_DIRECTORY_CONTROL] =
  90         CdfsDirectoryControl;
  91     DriverObject->MajorFunction[IRP_MJ_QUERY_INFORMATION] =
  92         CdfsQueryInformation;
  93     DriverObject->MajorFunction[IRP_MJ_SET_INFORMATION] =
  94         CdfsSetInformation;
  95     DriverObject->MajorFunction[IRP_MJ_QUERY_VOLUME_INFORMATION] =
  96         CdfsQueryVolumeInformation;
  97     DriverObject->MajorFunction[IRP_MJ_SET_VOLUME_INFORMATION] =
  98         CdfsSetVolumeInformation;
  99     DriverObject->MajorFunction[IRP_MJ_DEVICE_CONTROL] =
 100         CdfsDeviceControl;
 101
 102     CdfsGlobalData->FastIoDispatch.SizeOfFastIoDispatch = sizeof(FAST_IO_DISPATCH);
 103     CdfsGlobalData->FastIoDispatch.FastIoCheckIfPossible = CdfsFastIoCheckIfPossible;
 104     CdfsGlobalData->FastIoDispatch.FastIoRead = CdfsFastIoRead;
 105     CdfsGlobalData->FastIoDispatch.FastIoWrite = CdfsFastIoWrite;
 106     DriverObject->FastIoDispatch = &CdfsGlobalData->FastIoDispatch;
 107
 108     DriverObject->DriverUnload = NULL;
 109
 110     /* Cache manager */
 111     CdfsGlobalData->CacheMgrCallbacks.AcquireForLazyWrite = CdfsAcquireForLazyWrite;
 112     CdfsGlobalData->CacheMgrCallbacks.ReleaseFromLazyWrite = CdfsReleaseFromLazyWrite;
 113     CdfsGlobalData->CacheMgrCallbacks.AcquireForReadAhead = CdfsAcquireForLazyWrite;
 114     CdfsGlobalData->CacheMgrCallbacks.ReleaseFromReadAhead = CdfsReleaseFromLazyWrite;
 115
 116     DeviceObject->Flags |= DO_LOW_PRIORITY_FILESYSTEM;
 117
 118     IoRegisterFileSystem(DeviceObject);
 119     DeviceObject->Flags &= ~DO_DEVICE_INITIALIZING;
 120
 121     return(STATUS_SUCCESS);
 122 }
 123
 124
 125 BOOLEAN NTAPI
 126 CdfsAcquireForLazyWrite(IN PVOID Context,
 127                         IN BOOLEAN Wait)
 128 {
 129     PFCB Fcb = (PFCB)Context;
 130     ASSERT(Fcb);
 131     DPRINT("CdfsAcquireForLazyWrite(): Fcb %p\n", Fcb);
 132
 133     if (!ExAcquireResourceExclusiveLite(&(Fcb->MainResource), Wait))
 134     {
 135         DPRINT("CdfsAcquireForLazyWrite(): ExReleaseResourceLite failed.\n");
 136         return FALSE;
 137     }
 138     return TRUE;
 139 }
 140
 141 VOID NTAPI
 142 CdfsReleaseFromLazyWrite(IN PVOID Context)
 143 {
 144     PFCB Fcb = (PFCB)Context;
 145     ASSERT(Fcb);
 146     DPRINT("CdfsReleaseFromLazyWrite(): Fcb %p\n", Fcb);
 147
 148     ExReleaseResourceLite(&(Fcb->MainResource));
 149 }
 150
 151 BOOLEAN
 152 NTAPI
 153 CdfsFastIoCheckIfPossible(
 154     _In_ PFILE_OBJECT FileObject,
 155     _In_ PLARGE_INTEGER FileOffset,
 156     _In_ ULONG Length,
 157     _In_ BOOLEAN Wait,
 158     _In_ ULONG LockKey,
 159     _In_ BOOLEAN CheckForReadOperation,
 160     _Out_ PIO_STATUS_BLOCK IoStatus,
 161     _In_ PDEVICE_OBJECT DeviceObject)
 162 {
 163     /* Deny FastIo */
 164     UNREFERENCED_PARAMETER(FileObject);
 165     UNREFERENCED_PARAMETER(FileOffset);
 166     UNREFERENCED_PARAMETER(Length);
 167     UNREFERENCED_PARAMETER(Wait);
 168     UNREFERENCED_PARAMETER(LockKey);
 169     UNREFERENCED_PARAMETER(CheckForReadOperation);
 170     UNREFERENCED_PARAMETER(IoStatus);
 171     UNREFERENCED_PARAMETER(DeviceObject);
 172     return FALSE;
 173 }
 174
 175 BOOLEAN
 176 NTAPI
 177 CdfsFastIoRead(
 178     _In_ PFILE_OBJECT FileObject,
 179     _In_ PLARGE_INTEGER FileOffset,
 180     _In_ ULONG Length,
 181     _In_ BOOLEAN Wait,
 182     _In_ ULONG LockKey,
 183     _Out_ PVOID Buffer,
 184     _Out_ PIO_STATUS_BLOCK IoStatus,
 185     _In_ PDEVICE_OBJECT DeviceObject)
 186 {
 187     DBG_UNREFERENCED_PARAMETER(FileObject);
 188     DBG_UNREFERENCED_PARAMETER(FileOffset);
 189     DBG_UNREFERENCED_PARAMETER(Length);
 190     DBG_UNREFERENCED_PARAMETER(Wait);
 191     DBG_UNREFERENCED_PARAMETER(LockKey);
 192     DBG_UNREFERENCED_PARAMETER(Buffer);
 193     DBG_UNREFERENCED_PARAMETER(IoStatus);
 194     DBG_UNREFERENCED_PARAMETER(DeviceObject);
 195     return FALSE;
 196 }
 197
 198 BOOLEAN
 199 NTAPI
 200 CdfsFastIoWrite(
 201     _In_ PFILE_OBJECT FileObject,
 202     _In_ PLARGE_INTEGER FileOffset,
 203     _In_ ULONG Length,
 204     _In_ BOOLEAN Wait,
 205     _In_ ULONG LockKey,
 206     _In_ PVOID Buffer,
 207     _Out_ PIO_STATUS_BLOCK IoStatus,
 208     _In_ PDEVICE_OBJECT DeviceObject)
 209 {
 210     DBG_UNREFERENCED_PARAMETER(FileObject);
 211     DBG_UNREFERENCED_PARAMETER(FileOffset);
 212     DBG_UNREFERENCED_PARAMETER(Length);
 213     DBG_UNREFERENCED_PARAMETER(Wait);
 214     DBG_UNREFERENCED_PARAMETER(LockKey);
 215     DBG_UNREFERENCED_PARAMETER(Buffer);
 216     DBG_UNREFERENCED_PARAMETER(IoStatus);
 217     DBG_UNREFERENCED_PARAMETER(DeviceObject);
 218     return FALSE;
 219 }