3 * Copyright (C) 2002 ReactOS Team
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.
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.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 * COPYRIGHT: See COPYING in the top level directory
22 * PROJECT: ReactOS kernel
23 * FILE: services/fs/cdfs/cdfs.c
24 * PURPOSE: CDROM (ISO 9660) filesystem driver
25 * PROGRAMMER: Art Yerkes
29 /* INCLUDES *****************************************************************/
31 #include <ddk/ntddk.h>
39 /* FUNCTIONS ****************************************************************/
42 CdfsMakeAbsoluteFilename(PFILE_OBJECT pFileObject,
43 PWSTR pRelativeFileName,
44 PWSTR *pAbsoluteFilename)
49 DPRINT("try related for %S\n", pRelativeFileName);
50 Fcb = pFileObject->FsContext;
53 /* verify related object is a directory and target name
54 don't start with \. */
55 if (Fcb->Entry.FileFlags & 0x02 == 0 ||
56 pRelativeFileName[0] == L'\\')
58 return(STATUS_INVALID_PARAMETER);
61 /* construct absolute path name */
62 assert(wcslen (Fcb->PathName) + 1 + wcslen (pRelativeFileName) + 1
64 rcName = ExAllocatePool(NonPagedPool, MAX_PATH * sizeof(WCHAR));
67 return(STATUS_INSUFFICIENT_RESOURCES);
70 wcscpy(rcName, Fcb->PathName);
71 if (!CdfsFCBIsRoot(Fcb))
72 wcscat (rcName, L"\\");
73 wcscat (rcName, pRelativeFileName);
74 *pAbsoluteFilename = rcName;
76 return(STATUS_SUCCESS);
81 CdfsOpenFile(PDEVICE_EXTENSION DeviceExt,
82 PFILE_OBJECT FileObject,
85 * FUNCTION: Opens a file
91 PWSTR AbsFileName = NULL;
93 DPRINT("CdfsOpenFile(%08lx, %08lx, %S)\n", DeviceExt, FileObject, FileName);
95 if (FileObject->RelatedFileObject)
97 DPRINT("Converting relative filename to absolute filename\n");
99 Status = CdfsMakeAbsoluteFilename(FileObject->RelatedFileObject,
102 FileName = AbsFileName;
103 if (!NT_SUCCESS(Status))
107 return(STATUS_UNSUCCESSFUL);
110 //FIXME: Get cannonical path name (remove .'s, ..'s and extra separators)
112 DPRINT("PathName to open: %S\n", FileName);
114 /* try first to find an existing FCB in memory */
115 DPRINT("Checking for existing FCB in memory\n");
116 Fcb = CdfsGrabFCBFromTable(DeviceExt,
120 DPRINT("No existing FCB found, making a new one if file exists.\n");
121 Status = CdfsGetFCBForFile(DeviceExt,
125 if (ParentFcb != NULL)
127 CdfsReleaseFCB(DeviceExt,
131 if (!NT_SUCCESS (Status))
133 DPRINT("Could not make a new FCB, status: %x\n", Status);
136 ExFreePool(AbsFileName);
142 DPRINT("Attaching FCB to fileObject\n");
143 Status = CdfsAttachFCBToFileObject(DeviceExt,
148 ExFreePool (AbsFileName);
157 CdfsCreateFile(PDEVICE_OBJECT DeviceObject,
160 * FUNCTION: Opens a file
163 PDEVICE_EXTENSION DeviceExt;
164 PIO_STACK_LOCATION Stack;
165 PFILE_OBJECT FileObject;
166 ULONG RequestedDisposition;
167 ULONG RequestedOptions;
172 DPRINT("CdfsCreateFile() called\n");
174 DeviceExt = DeviceObject->DeviceExtension;
176 Stack = IoGetCurrentIrpStackLocation (Irp);
179 RequestedDisposition = ((Stack->Parameters.Create.Options >> 24) & 0xff);
180 RequestedOptions = Stack->Parameters.Create.Options & FILE_VALID_OPTION_FLAGS;
181 DPRINT("RequestedDisposition %x, RequestedOptions %x\n",
182 RequestedDisposition, RequestedOptions);
184 FileObject = Stack->FileObject;
186 if (RequestedDisposition == FILE_CREATE ||
187 RequestedDisposition == FILE_OVERWRITE_IF ||
188 RequestedDisposition == FILE_SUPERSEDE)
190 return(STATUS_ACCESS_DENIED);
193 Status = CdfsOpenFile(DeviceExt,
195 FileObject->FileName.Buffer);
197 if (NT_SUCCESS(Status))
199 Fcb = FileObject->FsContext;
201 * Check the file has the requested attributes
203 if (RequestedOptions & FILE_NON_DIRECTORY_FILE && CdfsFCBIsDirectory(Fcb))
205 CdfsCloseFile (DeviceExt, FileObject);
206 return STATUS_FILE_IS_A_DIRECTORY;
208 if (RequestedOptions & FILE_DIRECTORY_FILE && !CdfsFCBIsDirectory(Fcb))
210 CdfsCloseFile (DeviceExt, FileObject);
211 return STATUS_NOT_A_DIRECTORY;
216 * If the directory containing the file to open doesn't exist then
219 Irp->IoStatus.Information = (NT_SUCCESS(Status)) ? FILE_OPENED : 0;
220 Irp->IoStatus.Status = Status;
227 CdfsCreate(PDEVICE_OBJECT DeviceObject,
230 PDEVICE_EXTENSION DeviceExt;
233 if (DeviceObject == CdfsGlobalData->DeviceObject)
235 /* DeviceObject represents FileSystem instead of logical volume */
236 DPRINT("Opening file system\n");
237 Irp->IoStatus.Information = FILE_OPENED;
238 Status = STATUS_SUCCESS;
242 DeviceExt = DeviceObject->DeviceExtension;
244 ExAcquireResourceExclusiveLite(&DeviceExt->DirResource,
246 Status = CdfsCreateFile(DeviceObject,
248 ExReleaseResourceLite(&DeviceExt->DirResource);
251 Irp->IoStatus.Status = Status;
252 IoCompleteRequest(Irp,
253 NT_SUCCESS(Status) ? IO_DISK_INCREMENT : IO_NO_INCREMENT);