+++ /dev/null
-/*
- * ReactOS kernel
- * Copyright (C) 2002, 2003, 2004 ReactOS Team
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
-/*
- * COPYRIGHT: See COPYING in the top level directory
- * PROJECT: ReactOS kernel
- * FILE: drivers/filesystems/cdfs/cdfs.c
- * PURPOSE: CDROM (ISO 9660) filesystem driver
- * PROGRAMMER: Art Yerkes
- * Eric Kohl
- */
-
-/* INCLUDES *****************************************************************/
-
-#include "cdfs.h"
-
-#define NDEBUG
-#include <debug.h>
-
-/* FUNCTIONS ****************************************************************/
-
-static NTSTATUS
-CdfsMakeAbsoluteFilename(PFILE_OBJECT FileObject,
- PUNICODE_STRING RelativeFileName,
- PUNICODE_STRING AbsoluteFileName)
-{
- USHORT Length;
- PFCB Fcb;
- NTSTATUS Status;
-
- DPRINT("try related for %wZ\n", RelativeFileName);
- Fcb = FileObject->FsContext;
- ASSERT(Fcb);
-
- /* verify related object is a directory and target name
- don't start with \. */
- if ((Fcb->Entry.FileFlags & FILE_FLAG_DIRECTORY) == 0 ||
- (RelativeFileName->Length >= sizeof(WCHAR) &&
- RelativeFileName->Buffer[0] == L'\\'))
- {
- return STATUS_INVALID_PARAMETER;
- }
-
- /* construct absolute path name */
- Length = Fcb->PathName.Length +
- sizeof(WCHAR) +
- RelativeFileName->Length +
- sizeof(WCHAR);
- AbsoluteFileName->Length = 0;
- AbsoluteFileName->MaximumLength = Length;
- AbsoluteFileName->Buffer = ExAllocatePoolWithTag(NonPagedPool, Length, CDFS_FILENAME_TAG);
- if (AbsoluteFileName->Buffer == NULL)
- {
- return STATUS_INSUFFICIENT_RESOURCES;
- }
-
- Status = RtlAppendUnicodeStringToString(AbsoluteFileName,
- &Fcb->PathName);
- if (!NT_SUCCESS(Status))
- {
- RtlFreeUnicodeString(AbsoluteFileName);
- return Status;
- }
-
- if (!CdfsFCBIsRoot(Fcb))
- {
- Status = RtlAppendUnicodeToString(AbsoluteFileName,
- L"\\");
- if (!NT_SUCCESS(Status))
- {
- RtlFreeUnicodeString(AbsoluteFileName);
- return Status;
- }
- }
-
- Status = RtlAppendUnicodeStringToString(AbsoluteFileName,
- RelativeFileName);
- if (!NT_SUCCESS(Status))
- {
- RtlFreeUnicodeString(AbsoluteFileName);
- return Status;
- }
-
- return STATUS_SUCCESS;
-}
-
-
-/*
-* FUNCTION: Opens a file
-*/
-static NTSTATUS
-CdfsOpenFile(PDEVICE_EXTENSION DeviceExt,
- PFILE_OBJECT FileObject,
- PUNICODE_STRING FileName)
-{
- PFCB ParentFcb;
- PFCB Fcb;
- NTSTATUS Status;
- UNICODE_STRING AbsFileName;
-
- DPRINT("CdfsOpenFile(%p, %p, %wZ)\n", DeviceExt, FileObject, FileName);
-
- if (FileObject->RelatedFileObject)
- {
- DPRINT("Converting relative filename to absolute filename\n");
-
- Status = CdfsMakeAbsoluteFilename(FileObject->RelatedFileObject,
- FileName,
- &AbsFileName);
- if (!NT_SUCCESS(Status))
- {
- return Status;
- }
-
- FileName = &AbsFileName;
- }
-
- Status = CdfsDeviceIoControl (DeviceExt->StorageDevice,
- IOCTL_CDROM_CHECK_VERIFY,
- NULL,
- 0,
- NULL,
- 0,
- FALSE);
- DPRINT ("Status %lx\n", Status);
- if (!NT_SUCCESS(Status))
- {
- DPRINT1 ("Status %lx\n", Status);
- return Status;
- }
-
- DPRINT("PathName to open: %wZ\n", FileName);
-
- /* try first to find an existing FCB in memory */
- DPRINT("Checking for existing FCB in memory\n");
- Fcb = CdfsGrabFCBFromTable(DeviceExt,
- FileName);
- if (Fcb == NULL)
- {
- DPRINT("No existing FCB found, making a new one if file exists.\n");
- Status = CdfsGetFCBForFile(DeviceExt,
- &ParentFcb,
- &Fcb,
- FileName);
- if (ParentFcb != NULL)
- {
- CdfsReleaseFCB(DeviceExt,
- ParentFcb);
- }
-
- if (!NT_SUCCESS (Status))
- {
- DPRINT("Could not make a new FCB, status: %x\n", Status);
-
- if (FileName == &AbsFileName)
- RtlFreeUnicodeString(&AbsFileName);
-
- return Status;
- }
- }
-
- DPRINT("Attaching FCB to fileObject\n");
- Status = CdfsAttachFCBToFileObject(DeviceExt,
- Fcb,
- FileObject);
-
- if ((FileName == &AbsFileName) && AbsFileName.Buffer)
- ExFreePoolWithTag(AbsFileName.Buffer, CDFS_FILENAME_TAG);
-
- return Status;
-}
-
-
-/*
-* FUNCTION: Opens a file
-*/
-static NTSTATUS
-CdfsCreateFile(PDEVICE_OBJECT DeviceObject,
- PIRP Irp)
-{
- PDEVICE_EXTENSION DeviceExt;
- PIO_STACK_LOCATION Stack;
- PFILE_OBJECT FileObject;
- ULONG RequestedDisposition;
- ULONG RequestedOptions;
- PFCB Fcb;
- NTSTATUS Status;
-
- DPRINT("CdfsCreateFile() called\n");
-
- DeviceExt = DeviceObject->DeviceExtension;
- ASSERT(DeviceExt);
- Stack = IoGetCurrentIrpStackLocation (Irp);
- ASSERT(Stack);
-
- RequestedDisposition = ((Stack->Parameters.Create.Options >> 24) & 0xff);
- RequestedOptions = Stack->Parameters.Create.Options & FILE_VALID_OPTION_FLAGS;
- DPRINT("RequestedDisposition %x, RequestedOptions %x\n",
- RequestedDisposition, RequestedOptions);
-
- FileObject = Stack->FileObject;
-
- if (RequestedDisposition == FILE_CREATE ||
- RequestedDisposition == FILE_OVERWRITE_IF ||
- RequestedDisposition == FILE_SUPERSEDE)
- {
- return STATUS_ACCESS_DENIED;
- }
-
- Status = CdfsOpenFile(DeviceExt,
- FileObject,
- &FileObject->FileName);
- if (NT_SUCCESS(Status))
- {
- Fcb = FileObject->FsContext;
-
- /* Check whether the file has the requested attributes */
- if (RequestedOptions & FILE_NON_DIRECTORY_FILE && CdfsFCBIsDirectory(Fcb))
- {
- CdfsCloseFile (DeviceExt, FileObject);
- return STATUS_FILE_IS_A_DIRECTORY;
- }
-
- if (RequestedOptions & FILE_DIRECTORY_FILE && !CdfsFCBIsDirectory(Fcb))
- {
- CdfsCloseFile (DeviceExt, FileObject);
- return STATUS_NOT_A_DIRECTORY;
- }
- }
-
- /*
- * If the directory containing the file to open doesn't exist then
- * fail immediately
- */
- Irp->IoStatus.Information = (NT_SUCCESS(Status)) ? FILE_OPENED : 0;
-
- return Status;
-}
-
-
-NTSTATUS NTAPI
-CdfsCreate(
- PCDFS_IRP_CONTEXT IrpContext)
-{
- PDEVICE_OBJECT DeviceObject;
- PDEVICE_EXTENSION DeviceExt;
- NTSTATUS Status;
-
- DPRINT("CdfsCreate()\n");
-
- ASSERT(IrpContext);
-
- DeviceObject = IrpContext->DeviceObject;
- if (DeviceObject == CdfsGlobalData->CdFsDeviceObject || DeviceObject == CdfsGlobalData->HddFsDeviceObject)
- {
- /* DeviceObject represents FileSystem instead of logical volume */
- DPRINT("Opening file system\n");
- IrpContext->Irp->IoStatus.Information = FILE_OPENED;
- return STATUS_SUCCESS;
- }
-
- DeviceExt = DeviceObject->DeviceExtension;
-
- KeEnterCriticalRegion();
- ExAcquireResourceExclusiveLite(&DeviceExt->DirResource,
- TRUE);
- Status = CdfsCreateFile(DeviceObject,
- IrpContext->Irp);
- ExReleaseResourceLite(&DeviceExt->DirResource);
- KeLeaveCriticalRegion();
-
- return Status;
-}
-
-/* EOF */
projects / reactos.git / blobdiff