1 /* $Id: namespc.c,v 1.36 2003/02/25 16:49:08 ekohl Exp $
3 * COPYRIGHT: See COPYING in the top level directory
4 * PROJECT: ReactOS kernel
5 * FILE: ntoskrnl/ob/namespc.c
6 * PURPOSE: Manages the system namespace
7 * PROGRAMMER: David Welch (welch@mcmail.com)
12 /* INCLUDES ***************************************************************/
19 #include <ddk/ntddk.h>
20 #include <internal/ob.h>
21 #include <internal/io.h>
22 #include <internal/pool.h>
25 #include <internal/debug.h>
29 /* GLOBALS ****************************************************************/
31 POBJECT_TYPE ObDirectoryType
= NULL
;
32 POBJECT_TYPE ObTypeObjectType
= NULL
;
34 PDIRECTORY_OBJECT NameSpaceRoot
= NULL
;
36 static GENERIC_MAPPING ObpDirectoryMapping
= {
37 STANDARD_RIGHTS_READ
|DIRECTORY_QUERY
|DIRECTORY_TRAVERSE
,
38 STANDARD_RIGHTS_WRITE
|DIRECTORY_CREATE_OBJECT
|DIRECTORY_CREATE_SUBDIRECTORY
,
39 STANDARD_RIGHTS_EXECUTE
|DIRECTORY_QUERY
|DIRECTORY_TRAVERSE
,
40 DIRECTORY_ALL_ACCESS
};
42 static GENERIC_MAPPING ObpTypeMapping
= {
44 STANDARD_RIGHTS_WRITE
,
45 STANDARD_RIGHTS_EXECUTE
,
48 /* FUNCTIONS **************************************************************/
51 ObReferenceObjectByName(PUNICODE_STRING ObjectPath
,
53 PACCESS_STATE PassedAccessState
,
54 ACCESS_MASK DesiredAccess
,
55 POBJECT_TYPE ObjectType
,
56 KPROCESSOR_MODE AccessMode
,
61 UNICODE_STRING RemainingPath
;
62 OBJECT_ATTRIBUTES ObjectAttributes
;
65 InitializeObjectAttributes(&ObjectAttributes
,
70 Status
= ObFindObject(&ObjectAttributes
,
74 if (!NT_SUCCESS(Status
))
79 DPRINT("RemainingPath.Buffer '%S' Object %p\n", RemainingPath
.Buffer
, Object
);
81 if (RemainingPath
.Buffer
!= NULL
|| Object
== NULL
)
84 DPRINT("Object %p\n", Object
);
86 RtlFreeUnicodeString (&RemainingPath
);
87 return(STATUS_UNSUCCESSFUL
);
90 RtlFreeUnicodeString (&RemainingPath
);
91 return(STATUS_SUCCESS
);
93 #endif // WIN32_REGDBG
95 /**********************************************************************
100 * Obtain a handle to an existing object.
122 ObOpenObjectByName(IN POBJECT_ATTRIBUTES ObjectAttributes
,
123 IN POBJECT_TYPE ObjectType
,
124 IN OUT PVOID ParseContext
,
125 IN KPROCESSOR_MODE AccessMode
,
126 IN ACCESS_MASK DesiredAccess
,
127 IN PACCESS_STATE PassedAccessState
,
130 UNICODE_STRING RemainingPath
;
134 DPRINT("ObOpenObjectByName(...)\n");
136 Status
= ObFindObject(ObjectAttributes
,
140 if (!NT_SUCCESS(Status
))
145 if (RemainingPath
.Buffer
!= NULL
||
148 RtlFreeUnicodeString(&RemainingPath
);
149 return STATUS_UNSUCCESSFUL
;
152 Status
= ObCreateHandle(PsGetCurrentProcess(),
158 ObDereferenceObject(Object
);
159 RtlFreeUnicodeString(&RemainingPath
);
166 ObpAddEntryDirectory(PDIRECTORY_OBJECT Parent
,
167 POBJECT_HEADER Header
,
170 * FUNCTION: Add an entry to a namespace directory
172 * Parent = directory to add in
173 * Header = Header of the object to add the entry for
174 * Name = Name to give the entry
179 RtlCreateUnicodeString(&Header
->Name
, Name
);
180 Header
->Parent
= Parent
;
182 KeAcquireSpinLock(&Parent
->Lock
, &oldlvl
);
183 InsertTailList(&Parent
->head
, &Header
->Entry
);
184 KeReleaseSpinLock(&Parent
->Lock
, oldlvl
);
188 ObpRemoveEntryDirectory(POBJECT_HEADER Header
)
190 * FUNCTION: Remove an entry from a namespace directory
192 * Header = Header of the object to remove
197 DPRINT("ObpRemoveEntryDirectory(Header %x)\n",Header
);
199 KeAcquireSpinLock(&(Header
->Parent
->Lock
),&oldlvl
);
200 RemoveEntryList(&(Header
->Entry
));
201 KeReleaseSpinLock(&(Header
->Parent
->Lock
),oldlvl
);
205 ObpFindEntryDirectory(PDIRECTORY_OBJECT DirectoryObject
,
209 PLIST_ENTRY current
= DirectoryObject
->head
.Flink
;
210 POBJECT_HEADER current_obj
;
212 DPRINT("ObFindEntryDirectory(dir %x, name %S)\n",DirectoryObject
, Name
);
216 return(DirectoryObject
);
218 if (Name
[0]=='.' && Name
[1]==0)
220 return(DirectoryObject
);
222 if (Name
[0]=='.' && Name
[1]=='.' && Name
[2]==0)
224 return(BODY_TO_HEADER(DirectoryObject
)->Parent
);
226 while (current
!=(&(DirectoryObject
->head
)))
228 current_obj
= CONTAINING_RECORD(current
,OBJECT_HEADER
,Entry
);
229 DPRINT(" Scanning: %S for: %S\n",current_obj
->Name
.Buffer
, Name
);
230 if (Attributes
& OBJ_CASE_INSENSITIVE
)
232 if (_wcsicmp(current_obj
->Name
.Buffer
, Name
)==0)
234 DPRINT("Found it %x\n",HEADER_TO_BODY(current_obj
));
235 return(HEADER_TO_BODY(current_obj
));
240 if ( wcscmp(current_obj
->Name
.Buffer
, Name
)==0)
242 DPRINT("Found it %x\n",HEADER_TO_BODY(current_obj
));
243 return(HEADER_TO_BODY(current_obj
));
246 current
= current
->Flink
;
248 DPRINT(" Not Found: %s() = NULL\n",__FUNCTION__
);
253 ObpParseDirectory(PVOID Object
,
255 PUNICODE_STRING FullPath
,
262 DPRINT("ObpParseDirectory(Object %x, Path %x, *Path %S)\n",
269 return STATUS_UNSUCCESSFUL
;
272 end
= wcschr((*Path
)+1, '\\');
278 FoundObject
= ObpFindEntryDirectory(Object
, (*Path
)+1, Attributes
);
280 if (FoundObject
== NULL
)
286 return STATUS_UNSUCCESSFUL
;
289 ObReferenceObjectByPointer(FoundObject
,
290 STANDARD_RIGHTS_REQUIRED
,
304 *NextObject
= FoundObject
;
306 return STATUS_SUCCESS
;
310 ObpCreateDirectory(PVOID ObjectBody
,
313 POBJECT_ATTRIBUTES ObjectAttributes
)
315 PDIRECTORY_OBJECT DirectoryObject
= (PDIRECTORY_OBJECT
)ObjectBody
;
317 DPRINT("ObpCreateDirectory(ObjectBody %x, Parent %x, RemainingPath %S)\n",
318 ObjectBody
, Parent
, RemainingPath
);
320 if (RemainingPath
!= NULL
&& wcschr(RemainingPath
+1, '\\') != NULL
)
322 return(STATUS_UNSUCCESSFUL
);
325 InitializeListHead(&DirectoryObject
->head
);
326 KeInitializeSpinLock(&DirectoryObject
->Lock
);
328 return(STATUS_SUCCESS
);
335 * FUNCTION: Initialize the object manager namespace
338 OBJECT_ATTRIBUTES ObjectAttributes
;
341 /* create 'directory' object type */
342 ObDirectoryType
= ExAllocatePool(NonPagedPool
,sizeof(OBJECT_TYPE
));
344 ObDirectoryType
->Tag
= TAG('D', 'I', 'R', 'T');
345 ObDirectoryType
->TotalObjects
= 0;
346 ObDirectoryType
->TotalHandles
= 0;
347 ObDirectoryType
->MaxObjects
= ULONG_MAX
;
348 ObDirectoryType
->MaxHandles
= ULONG_MAX
;
349 ObDirectoryType
->PagedPoolCharge
= 0;
350 ObDirectoryType
->NonpagedPoolCharge
= sizeof(DIRECTORY_OBJECT
);
351 ObDirectoryType
->Mapping
= &ObpDirectoryMapping
;
352 ObDirectoryType
->Dump
= NULL
;
353 ObDirectoryType
->Open
= NULL
;
354 ObDirectoryType
->Close
= NULL
;
355 ObDirectoryType
->Delete
= NULL
;
356 ObDirectoryType
->Parse
= ObpParseDirectory
;
357 ObDirectoryType
->Security
= NULL
;
358 ObDirectoryType
->QueryName
= NULL
;
359 ObDirectoryType
->OkayToClose
= NULL
;
360 ObDirectoryType
->Create
= ObpCreateDirectory
;
361 ObDirectoryType
->DuplicationNotify
= NULL
;
363 RtlInitUnicodeStringFromLiteral(&ObDirectoryType
->TypeName
,
366 /* create 'type' object type*/
367 ObTypeObjectType
= ExAllocatePool(NonPagedPool
,sizeof(OBJECT_TYPE
));
369 ObTypeObjectType
->Tag
= TAG('T', 'y', 'p', 'T');
370 ObTypeObjectType
->TotalObjects
= 0;
371 ObTypeObjectType
->TotalHandles
= 0;
372 ObTypeObjectType
->MaxObjects
= ULONG_MAX
;
373 ObTypeObjectType
->MaxHandles
= ULONG_MAX
;
374 ObTypeObjectType
->PagedPoolCharge
= 0;
375 ObTypeObjectType
->NonpagedPoolCharge
= sizeof(TYPE_OBJECT
);
376 ObTypeObjectType
->Mapping
= &ObpTypeMapping
;
377 ObTypeObjectType
->Dump
= NULL
;
378 ObTypeObjectType
->Open
= NULL
;
379 ObTypeObjectType
->Close
= NULL
;
380 ObTypeObjectType
->Delete
= NULL
;
381 ObTypeObjectType
->Parse
= NULL
;
382 ObTypeObjectType
->Security
= NULL
;
383 ObTypeObjectType
->QueryName
= NULL
;
384 ObTypeObjectType
->OkayToClose
= NULL
;
385 ObTypeObjectType
->Create
= NULL
;
386 ObTypeObjectType
->DuplicationNotify
= NULL
;
388 RtlInitUnicodeStringFromLiteral(&ObTypeObjectType
->TypeName
,
391 /* create root directory */
393 STANDARD_RIGHTS_REQUIRED
,
396 (PVOID
*)&NameSpaceRoot
);
398 /* create '\ObjectTypes' directory */
399 RtlInitUnicodeStringFromLiteral(&Name
,
401 InitializeObjectAttributes(&ObjectAttributes
,
407 STANDARD_RIGHTS_REQUIRED
,
412 ObpCreateTypeObject(ObDirectoryType
);
413 ObpCreateTypeObject(ObTypeObjectType
);
415 /* Create 'symbolic link' object type */
416 ObInitSymbolicLinkImplementation();
421 ObpCreateTypeObject(POBJECT_TYPE ObjectType
)
423 OBJECT_ATTRIBUTES ObjectAttributes
;
424 WCHAR NameString
[120];
425 PTYPE_OBJECT TypeObject
= NULL
;
429 DPRINT("ObpCreateTypeObject(ObjectType: %wZ)\n", &ObjectType
->TypeName
);
430 wcscpy(NameString
, L
"\\ObjectTypes\\");
431 wcscat(NameString
, ObjectType
->TypeName
.Buffer
);
432 RtlInitUnicodeString(&Name
,
435 InitializeObjectAttributes(&ObjectAttributes
,
440 Status
= ObCreateObject(NULL
,
441 STANDARD_RIGHTS_REQUIRED
,
444 (PVOID
*)&TypeObject
);
445 if (NT_SUCCESS(Status
))
447 TypeObject
->ObjectType
= ObjectType
;
450 return(STATUS_SUCCESS
);