1 /* $Id: namespc.c,v 1.37 2003/05/12 13:59:09 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 ***************************************************************/
15 #include <ddk/ntddk.h>
16 #include <internal/ob.h>
17 #include <internal/io.h>
18 #include <internal/pool.h>
21 #include <internal/debug.h>
24 /* GLOBALS ****************************************************************/
26 POBJECT_TYPE ObDirectoryType
= NULL
;
27 POBJECT_TYPE ObTypeObjectType
= NULL
;
29 PDIRECTORY_OBJECT NameSpaceRoot
= NULL
;
31 static GENERIC_MAPPING ObpDirectoryMapping
= {
32 STANDARD_RIGHTS_READ
|DIRECTORY_QUERY
|DIRECTORY_TRAVERSE
,
33 STANDARD_RIGHTS_WRITE
|DIRECTORY_CREATE_OBJECT
|DIRECTORY_CREATE_SUBDIRECTORY
,
34 STANDARD_RIGHTS_EXECUTE
|DIRECTORY_QUERY
|DIRECTORY_TRAVERSE
,
35 DIRECTORY_ALL_ACCESS
};
37 static GENERIC_MAPPING ObpTypeMapping
= {
39 STANDARD_RIGHTS_WRITE
,
40 STANDARD_RIGHTS_EXECUTE
,
43 /* FUNCTIONS **************************************************************/
46 ObReferenceObjectByName(PUNICODE_STRING ObjectPath
,
48 PACCESS_STATE PassedAccessState
,
49 ACCESS_MASK DesiredAccess
,
50 POBJECT_TYPE ObjectType
,
51 KPROCESSOR_MODE AccessMode
,
56 UNICODE_STRING RemainingPath
;
57 OBJECT_ATTRIBUTES ObjectAttributes
;
60 InitializeObjectAttributes(&ObjectAttributes
,
65 Status
= ObFindObject(&ObjectAttributes
,
69 if (!NT_SUCCESS(Status
))
74 DPRINT("RemainingPath.Buffer '%S' Object %p\n", RemainingPath
.Buffer
, Object
);
76 if (RemainingPath
.Buffer
!= NULL
|| Object
== NULL
)
79 DPRINT("Object %p\n", Object
);
81 RtlFreeUnicodeString (&RemainingPath
);
82 return(STATUS_UNSUCCESSFUL
);
85 RtlFreeUnicodeString (&RemainingPath
);
86 return(STATUS_SUCCESS
);
90 /**********************************************************************
95 * 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
;
345 /* create 'directory' object type */
346 ObDirectoryType
= ExAllocatePool(NonPagedPool
,sizeof(OBJECT_TYPE
));
348 ObDirectoryType
->Tag
= TAG('D', 'I', 'R', 'T');
349 ObDirectoryType
->TotalObjects
= 0;
350 ObDirectoryType
->TotalHandles
= 0;
351 ObDirectoryType
->MaxObjects
= ULONG_MAX
;
352 ObDirectoryType
->MaxHandles
= ULONG_MAX
;
353 ObDirectoryType
->PagedPoolCharge
= 0;
354 ObDirectoryType
->NonpagedPoolCharge
= sizeof(DIRECTORY_OBJECT
);
355 ObDirectoryType
->Mapping
= &ObpDirectoryMapping
;
356 ObDirectoryType
->Dump
= NULL
;
357 ObDirectoryType
->Open
= NULL
;
358 ObDirectoryType
->Close
= NULL
;
359 ObDirectoryType
->Delete
= NULL
;
360 ObDirectoryType
->Parse
= ObpParseDirectory
;
361 ObDirectoryType
->Security
= NULL
;
362 ObDirectoryType
->QueryName
= NULL
;
363 ObDirectoryType
->OkayToClose
= NULL
;
364 ObDirectoryType
->Create
= ObpCreateDirectory
;
365 ObDirectoryType
->DuplicationNotify
= NULL
;
367 RtlInitUnicodeStringFromLiteral(&ObDirectoryType
->TypeName
,
370 /* create 'type' object type*/
371 ObTypeObjectType
= ExAllocatePool(NonPagedPool
,sizeof(OBJECT_TYPE
));
373 ObTypeObjectType
->Tag
= TAG('T', 'y', 'p', 'T');
374 ObTypeObjectType
->TotalObjects
= 0;
375 ObTypeObjectType
->TotalHandles
= 0;
376 ObTypeObjectType
->MaxObjects
= ULONG_MAX
;
377 ObTypeObjectType
->MaxHandles
= ULONG_MAX
;
378 ObTypeObjectType
->PagedPoolCharge
= 0;
379 ObTypeObjectType
->NonpagedPoolCharge
= sizeof(TYPE_OBJECT
);
380 ObTypeObjectType
->Mapping
= &ObpTypeMapping
;
381 ObTypeObjectType
->Dump
= NULL
;
382 ObTypeObjectType
->Open
= NULL
;
383 ObTypeObjectType
->Close
= NULL
;
384 ObTypeObjectType
->Delete
= NULL
;
385 ObTypeObjectType
->Parse
= NULL
;
386 ObTypeObjectType
->Security
= NULL
;
387 ObTypeObjectType
->QueryName
= NULL
;
388 ObTypeObjectType
->OkayToClose
= NULL
;
389 ObTypeObjectType
->Create
= NULL
;
390 ObTypeObjectType
->DuplicationNotify
= NULL
;
392 RtlInitUnicodeStringFromLiteral(&ObTypeObjectType
->TypeName
,
395 /* create root directory */
397 STANDARD_RIGHTS_REQUIRED
,
400 (PVOID
*)&NameSpaceRoot
);
402 /* create '\ObjectTypes' directory */
403 RtlInitUnicodeStringFromLiteral(&Name
,
405 InitializeObjectAttributes(&ObjectAttributes
,
411 STANDARD_RIGHTS_REQUIRED
,
416 ObpCreateTypeObject(ObDirectoryType
);
417 ObpCreateTypeObject(ObTypeObjectType
);
419 /* Create 'symbolic link' object type */
420 ObInitSymbolicLinkImplementation();
425 ObpCreateTypeObject(POBJECT_TYPE ObjectType
)
427 OBJECT_ATTRIBUTES ObjectAttributes
;
428 WCHAR NameString
[120];
429 PTYPE_OBJECT TypeObject
= NULL
;
433 DPRINT("ObpCreateTypeObject(ObjectType: %wZ)\n", &ObjectType
->TypeName
);
434 wcscpy(NameString
, L
"\\ObjectTypes\\");
435 wcscat(NameString
, ObjectType
->TypeName
.Buffer
);
436 RtlInitUnicodeString(&Name
,
439 InitializeObjectAttributes(&ObjectAttributes
,
444 Status
= ObCreateObject(NULL
,
445 STANDARD_RIGHTS_REQUIRED
,
448 (PVOID
*)&TypeObject
);
449 if (NT_SUCCESS(Status
))
451 TypeObject
->ObjectType
= ObjectType
;
454 return(STATUS_SUCCESS
);