1 /* $Id: namespc.c,v 1.48 2004/09/05 22:25:36 hbirr 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 ***************************************************************/
16 #include <internal/debug.h>
19 /* GLOBALS ****************************************************************/
21 POBJECT_TYPE ObDirectoryType
= NULL
;
22 POBJECT_TYPE ObTypeObjectType
= NULL
;
24 PDIRECTORY_OBJECT NameSpaceRoot
= NULL
;
26 static GENERIC_MAPPING ObpDirectoryMapping
= {
27 STANDARD_RIGHTS_READ
|DIRECTORY_QUERY
|DIRECTORY_TRAVERSE
,
28 STANDARD_RIGHTS_WRITE
|DIRECTORY_CREATE_OBJECT
|DIRECTORY_CREATE_SUBDIRECTORY
,
29 STANDARD_RIGHTS_EXECUTE
|DIRECTORY_QUERY
|DIRECTORY_TRAVERSE
,
30 DIRECTORY_ALL_ACCESS
};
32 static GENERIC_MAPPING ObpTypeMapping
= {
34 STANDARD_RIGHTS_WRITE
,
35 STANDARD_RIGHTS_EXECUTE
,
38 /* FUNCTIONS **************************************************************/
44 ObReferenceObjectByName(PUNICODE_STRING ObjectPath
,
46 PACCESS_STATE PassedAccessState
,
47 ACCESS_MASK DesiredAccess
,
48 POBJECT_TYPE ObjectType
,
49 KPROCESSOR_MODE AccessMode
,
54 UNICODE_STRING RemainingPath
;
55 OBJECT_ATTRIBUTES ObjectAttributes
;
58 InitializeObjectAttributes(&ObjectAttributes
,
63 Status
= ObFindObject(&ObjectAttributes
,
67 if (!NT_SUCCESS(Status
))
72 DPRINT("RemainingPath.Buffer '%S' Object %p\n", RemainingPath
.Buffer
, Object
);
74 if (RemainingPath
.Buffer
!= NULL
|| Object
== NULL
)
77 DPRINT("Object %p\n", Object
);
79 RtlFreeUnicodeString (&RemainingPath
);
80 return(STATUS_OBJECT_NAME_NOT_FOUND
);
83 RtlFreeUnicodeString (&RemainingPath
);
84 return(STATUS_SUCCESS
);
88 /**********************************************************************
93 * Obtain a handle to an existing object.
117 ObOpenObjectByName(IN POBJECT_ATTRIBUTES ObjectAttributes
,
118 IN POBJECT_TYPE ObjectType
,
119 IN OUT PVOID ParseContext
,
120 IN KPROCESSOR_MODE AccessMode
,
121 IN ACCESS_MASK DesiredAccess
,
122 IN PACCESS_STATE PassedAccessState
,
125 UNICODE_STRING RemainingPath
;
129 DPRINT("ObOpenObjectByName(...)\n");
131 Status
= ObFindObject(ObjectAttributes
,
135 if (!NT_SUCCESS(Status
))
137 DPRINT("ObFindObject() failed (Status %lx)\n", Status
);
141 if (RemainingPath
.Buffer
!= NULL
||
144 RtlFreeUnicodeString(&RemainingPath
);
145 return STATUS_UNSUCCESSFUL
;
148 Status
= ObCreateHandle(PsGetCurrentProcess(),
154 ObDereferenceObject(Object
);
155 RtlFreeUnicodeString(&RemainingPath
);
162 ObpAddEntryDirectory(PDIRECTORY_OBJECT Parent
,
163 POBJECT_HEADER Header
,
166 * FUNCTION: Add an entry to a namespace directory
168 * Parent = directory to add in
169 * Header = Header of the object to add the entry for
170 * Name = Name to give the entry
175 RtlCreateUnicodeString(&Header
->Name
, Name
);
176 Header
->Parent
= Parent
;
178 KeAcquireSpinLock(&Parent
->Lock
, &oldlvl
);
179 InsertTailList(&Parent
->head
, &Header
->Entry
);
180 KeReleaseSpinLock(&Parent
->Lock
, oldlvl
);
185 ObpRemoveEntryDirectory(POBJECT_HEADER Header
)
187 * FUNCTION: Remove an entry from a namespace directory
189 * Header = Header of the object to remove
194 DPRINT("ObpRemoveEntryDirectory(Header %x)\n",Header
);
196 KeAcquireSpinLock(&(Header
->Parent
->Lock
),&oldlvl
);
197 RemoveEntryList(&(Header
->Entry
));
198 KeReleaseSpinLock(&(Header
->Parent
->Lock
),oldlvl
);
203 ObpFindEntryDirectory(PDIRECTORY_OBJECT DirectoryObject
,
207 PLIST_ENTRY current
= DirectoryObject
->head
.Flink
;
208 POBJECT_HEADER current_obj
;
210 DPRINT("ObFindEntryDirectory(dir %x, name %S)\n",DirectoryObject
, Name
);
214 return(DirectoryObject
);
216 if (Name
[0]=='.' && Name
[1]==0)
218 return(DirectoryObject
);
220 if (Name
[0]=='.' && Name
[1]=='.' && Name
[2]==0)
222 return(BODY_TO_HEADER(DirectoryObject
)->Parent
);
224 while (current
!=(&(DirectoryObject
->head
)))
226 current_obj
= CONTAINING_RECORD(current
,OBJECT_HEADER
,Entry
);
227 DPRINT(" Scanning: %S for: %S\n",current_obj
->Name
.Buffer
, Name
);
228 if (Attributes
& OBJ_CASE_INSENSITIVE
)
230 if (_wcsicmp(current_obj
->Name
.Buffer
, Name
)==0)
232 DPRINT("Found it %x\n",HEADER_TO_BODY(current_obj
));
233 return(HEADER_TO_BODY(current_obj
));
238 if ( wcscmp(current_obj
->Name
.Buffer
, Name
)==0)
240 DPRINT("Found it %x\n",HEADER_TO_BODY(current_obj
));
241 return(HEADER_TO_BODY(current_obj
));
244 current
= current
->Flink
;
246 DPRINT(" Not Found: %s() = NULL\n",__FUNCTION__
);
252 ObpParseDirectory(PVOID Object
,
254 PUNICODE_STRING FullPath
,
262 DPRINT("ObpParseDirectory(Object %x, Path %x, *Path %S)\n",
269 return STATUS_UNSUCCESSFUL
;
276 End
= wcschr(Start
, L
'\\');
282 FoundObject
= ObpFindEntryDirectory(Object
, Start
, Attributes
);
283 if (FoundObject
== NULL
)
289 return STATUS_UNSUCCESSFUL
;
292 ObReferenceObjectByPointer(FoundObject
,
293 STANDARD_RIGHTS_REQUIRED
,
307 *NextObject
= FoundObject
;
309 return STATUS_SUCCESS
;
314 ObpCreateDirectory(PVOID ObjectBody
,
317 POBJECT_ATTRIBUTES ObjectAttributes
)
319 PDIRECTORY_OBJECT DirectoryObject
= (PDIRECTORY_OBJECT
)ObjectBody
;
321 DPRINT("ObpCreateDirectory(ObjectBody %x, Parent %x, RemainingPath %S)\n",
322 ObjectBody
, Parent
, RemainingPath
);
324 if (RemainingPath
!= NULL
&& wcschr(RemainingPath
+1, '\\') != NULL
)
326 return(STATUS_UNSUCCESSFUL
);
329 InitializeListHead(&DirectoryObject
->head
);
330 KeInitializeSpinLock(&DirectoryObject
->Lock
);
332 return(STATUS_SUCCESS
);
339 * FUNCTION: Initialize the object manager namespace
342 OBJECT_ATTRIBUTES ObjectAttributes
;
344 SECURITY_DESCRIPTOR SecurityDescriptor
;
346 /* Initialize the security descriptor cache */
349 /* create 'directory' object type */
350 ObDirectoryType
= ExAllocatePool(NonPagedPool
,sizeof(OBJECT_TYPE
));
352 ObDirectoryType
->Tag
= TAG('D', 'I', 'R', 'T');
353 ObDirectoryType
->TotalObjects
= 0;
354 ObDirectoryType
->TotalHandles
= 0;
355 ObDirectoryType
->MaxObjects
= ULONG_MAX
;
356 ObDirectoryType
->MaxHandles
= ULONG_MAX
;
357 ObDirectoryType
->PagedPoolCharge
= 0;
358 ObDirectoryType
->NonpagedPoolCharge
= sizeof(DIRECTORY_OBJECT
);
359 ObDirectoryType
->Mapping
= &ObpDirectoryMapping
;
360 ObDirectoryType
->Dump
= NULL
;
361 ObDirectoryType
->Open
= NULL
;
362 ObDirectoryType
->Close
= NULL
;
363 ObDirectoryType
->Delete
= NULL
;
364 ObDirectoryType
->Parse
= ObpParseDirectory
;
365 ObDirectoryType
->Security
= NULL
;
366 ObDirectoryType
->QueryName
= NULL
;
367 ObDirectoryType
->OkayToClose
= NULL
;
368 ObDirectoryType
->Create
= ObpCreateDirectory
;
369 ObDirectoryType
->DuplicationNotify
= NULL
;
371 RtlRosInitUnicodeStringFromLiteral(&ObDirectoryType
->TypeName
,
374 /* create 'type' object type*/
375 ObTypeObjectType
= ExAllocatePool(NonPagedPool
,sizeof(OBJECT_TYPE
));
377 ObTypeObjectType
->Tag
= TAG('T', 'y', 'p', 'T');
378 ObTypeObjectType
->TotalObjects
= 0;
379 ObTypeObjectType
->TotalHandles
= 0;
380 ObTypeObjectType
->MaxObjects
= ULONG_MAX
;
381 ObTypeObjectType
->MaxHandles
= ULONG_MAX
;
382 ObTypeObjectType
->PagedPoolCharge
= 0;
383 ObTypeObjectType
->NonpagedPoolCharge
= sizeof(TYPE_OBJECT
);
384 ObTypeObjectType
->Mapping
= &ObpTypeMapping
;
385 ObTypeObjectType
->Dump
= NULL
;
386 ObTypeObjectType
->Open
= NULL
;
387 ObTypeObjectType
->Close
= NULL
;
388 ObTypeObjectType
->Delete
= NULL
;
389 ObTypeObjectType
->Parse
= NULL
;
390 ObTypeObjectType
->Security
= NULL
;
391 ObTypeObjectType
->QueryName
= NULL
;
392 ObTypeObjectType
->OkayToClose
= NULL
;
393 ObTypeObjectType
->Create
= NULL
;
394 ObTypeObjectType
->DuplicationNotify
= NULL
;
396 RtlRosInitUnicodeStringFromLiteral(&ObTypeObjectType
->TypeName
,
399 /* Create security descriptor */
400 RtlCreateSecurityDescriptor(&SecurityDescriptor
,
401 SECURITY_DESCRIPTOR_REVISION1
);
403 RtlSetOwnerSecurityDescriptor(&SecurityDescriptor
,
407 RtlSetGroupSecurityDescriptor(&SecurityDescriptor
,
411 RtlSetDaclSecurityDescriptor(&SecurityDescriptor
,
416 /* Create root directory */
417 InitializeObjectAttributes(&ObjectAttributes
,
421 &SecurityDescriptor
);
422 ObCreateObject(KernelMode
,
427 sizeof(DIRECTORY_OBJECT
),
430 (PVOID
*)&NameSpaceRoot
);
432 /* Create '\ObjectTypes' directory */
433 RtlRosInitUnicodeStringFromLiteral(&Name
,
435 InitializeObjectAttributes(&ObjectAttributes
,
439 &SecurityDescriptor
);
440 ObCreateObject(KernelMode
,
445 sizeof(DIRECTORY_OBJECT
),
450 ObpCreateTypeObject(ObDirectoryType
);
451 ObpCreateTypeObject(ObTypeObjectType
);
453 /* Create 'symbolic link' object type */
454 ObInitSymbolicLinkImplementation();
459 ObpCreateTypeObject(POBJECT_TYPE ObjectType
)
461 OBJECT_ATTRIBUTES ObjectAttributes
;
462 WCHAR NameString
[120];
463 PTYPE_OBJECT TypeObject
= NULL
;
467 DPRINT("ObpCreateTypeObject(ObjectType: %wZ)\n", &ObjectType
->TypeName
);
468 wcscpy(NameString
, L
"\\ObjectTypes\\");
469 wcscat(NameString
, ObjectType
->TypeName
.Buffer
);
470 RtlInitUnicodeString(&Name
,
473 InitializeObjectAttributes(&ObjectAttributes
,
478 Status
= ObCreateObject(KernelMode
,
486 (PVOID
*)&TypeObject
);
487 if (NT_SUCCESS(Status
))
489 TypeObject
->ObjectType
= ObjectType
;
492 return(STATUS_SUCCESS
);