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
8 * PROGRAMMERS: David Welch (welch@mcmail.com)
11 /* INCLUDES ***************************************************************/
15 #include <internal/debug.h>
18 /* GLOBALS ****************************************************************/
20 POBJECT_TYPE ObDirectoryType
= NULL
;
21 POBJECT_TYPE ObTypeObjectType
= NULL
;
23 PDIRECTORY_OBJECT NameSpaceRoot
= NULL
;
24 /* FIXME: Move this somewhere else once devicemap support is in */
25 PDEVICE_MAP ObSystemDeviceMap
= NULL
;
27 static GENERIC_MAPPING ObpDirectoryMapping
= {
28 STANDARD_RIGHTS_READ
|DIRECTORY_QUERY
|DIRECTORY_TRAVERSE
,
29 STANDARD_RIGHTS_WRITE
|DIRECTORY_CREATE_OBJECT
|DIRECTORY_CREATE_SUBDIRECTORY
,
30 STANDARD_RIGHTS_EXECUTE
|DIRECTORY_QUERY
|DIRECTORY_TRAVERSE
,
31 DIRECTORY_ALL_ACCESS
};
33 static GENERIC_MAPPING ObpTypeMapping
= {
35 STANDARD_RIGHTS_WRITE
,
36 STANDARD_RIGHTS_EXECUTE
,
39 /* FUNCTIONS **************************************************************/
45 ObReferenceObjectByName(PUNICODE_STRING ObjectPath
,
47 PACCESS_STATE PassedAccessState
,
48 ACCESS_MASK DesiredAccess
,
49 POBJECT_TYPE ObjectType
,
50 KPROCESSOR_MODE AccessMode
,
55 UNICODE_STRING RemainingPath
;
56 OBJECT_ATTRIBUTES ObjectAttributes
;
61 InitializeObjectAttributes(&ObjectAttributes
,
63 Attributes
| OBJ_OPENIF
,
66 Status
= ObFindObject(&ObjectAttributes
,
70 if (!NT_SUCCESS(Status
))
75 DPRINT("RemainingPath.Buffer '%S' Object %p\n", RemainingPath
.Buffer
, Object
);
77 if (RemainingPath
.Buffer
!= NULL
|| Object
== NULL
)
80 DPRINT("Object %p\n", Object
);
82 RtlFreeUnicodeString (&RemainingPath
);
83 return(STATUS_OBJECT_NAME_NOT_FOUND
);
86 RtlFreeUnicodeString (&RemainingPath
);
87 return(STATUS_SUCCESS
);
91 /**********************************************************************
96 * Obtain a handle to an existing object.
120 ObOpenObjectByName(IN POBJECT_ATTRIBUTES ObjectAttributes
,
121 IN POBJECT_TYPE ObjectType
,
122 IN OUT PVOID ParseContext
,
123 IN KPROCESSOR_MODE AccessMode
,
124 IN ACCESS_MASK DesiredAccess
,
125 IN PACCESS_STATE PassedAccessState
,
128 UNICODE_STRING RemainingPath
;
134 DPRINT("ObOpenObjectByName(...)\n");
136 Status
= ObFindObject(ObjectAttributes
,
140 if (!NT_SUCCESS(Status
))
142 DPRINT("ObFindObject() failed (Status %lx)\n", Status
);
146 if (RemainingPath
.Buffer
!= NULL
||
149 RtlFreeUnicodeString(&RemainingPath
);
150 return STATUS_UNSUCCESSFUL
;
153 Status
= ObCreateHandle(PsGetCurrentProcess(),
159 ObDereferenceObject(Object
);
160 RtlFreeUnicodeString(&RemainingPath
);
167 ObQueryDeviceMapInformation(PEPROCESS Process
,
168 PPROCESS_DEVICEMAP_INFORMATION DeviceMapInfo
)
173 * FIXME: This is an ugly hack for now, to always return the System Device Map
174 * instead of returning the Process Device Map. Not important yet since we don't use it
177 /* FIXME: Acquire the DeviceMap Spinlock */
178 // KeAcquireSpinLock(DeviceMap->Lock, &OldIrql);
181 DeviceMapInfo
->Query
.DriveMap
= ObSystemDeviceMap
->DriveMap
;
182 RtlMoveMemory(DeviceMapInfo
->Query
.DriveType
, ObSystemDeviceMap
->DriveType
, sizeof(ObSystemDeviceMap
->DriveType
));
184 /* FIXME: Release the DeviceMap Spinlock */
185 // KeReleasepinLock(DeviceMap->Lock, OldIrql);
189 ObpAddEntryDirectory(PDIRECTORY_OBJECT Parent
,
190 POBJECT_HEADER Header
,
193 * FUNCTION: Add an entry to a namespace directory
195 * Parent = directory to add in
196 * Header = Header of the object to add the entry for
197 * Name = Name to give the entry
202 RtlpCreateUnicodeString(&Header
->Name
, Name
, NonPagedPool
);
203 Header
->Parent
= Parent
;
205 KeAcquireSpinLock(&Parent
->Lock
, &oldlvl
);
206 InsertTailList(&Parent
->head
, &Header
->Entry
);
207 KeReleaseSpinLock(&Parent
->Lock
, oldlvl
);
212 ObpRemoveEntryDirectory(POBJECT_HEADER Header
)
214 * FUNCTION: Remove an entry from a namespace directory
216 * Header = Header of the object to remove
221 DPRINT("ObpRemoveEntryDirectory(Header %x)\n",Header
);
223 KeAcquireSpinLock(&(Header
->Parent
->Lock
),&oldlvl
);
224 RemoveEntryList(&(Header
->Entry
));
225 KeReleaseSpinLock(&(Header
->Parent
->Lock
),oldlvl
);
230 ObpFindEntryDirectory(PDIRECTORY_OBJECT DirectoryObject
,
234 PLIST_ENTRY current
= DirectoryObject
->head
.Flink
;
235 POBJECT_HEADER current_obj
;
237 DPRINT("ObFindEntryDirectory(dir %x, name %S)\n",DirectoryObject
, Name
);
241 return(DirectoryObject
);
243 if (Name
[0]=='.' && Name
[1]==0)
245 return(DirectoryObject
);
247 if (Name
[0]=='.' && Name
[1]=='.' && Name
[2]==0)
249 return(BODY_TO_HEADER(DirectoryObject
)->Parent
);
251 while (current
!=(&(DirectoryObject
->head
)))
253 current_obj
= CONTAINING_RECORD(current
,OBJECT_HEADER
,Entry
);
254 DPRINT(" Scanning: %S for: %S\n",current_obj
->Name
.Buffer
, Name
);
255 if (Attributes
& OBJ_CASE_INSENSITIVE
)
257 if (_wcsicmp(current_obj
->Name
.Buffer
, Name
)==0)
259 DPRINT("Found it %x\n",HEADER_TO_BODY(current_obj
));
260 return(HEADER_TO_BODY(current_obj
));
265 if ( wcscmp(current_obj
->Name
.Buffer
, Name
)==0)
267 DPRINT("Found it %x\n",HEADER_TO_BODY(current_obj
));
268 return(HEADER_TO_BODY(current_obj
));
271 current
= current
->Flink
;
273 DPRINT(" Not Found: %s() = NULL\n",__FUNCTION__
);
279 ObpParseDirectory(PVOID Object
,
281 PUNICODE_STRING FullPath
,
289 DPRINT("ObpParseDirectory(Object %x, Path %x, *Path %S)\n",
296 return STATUS_UNSUCCESSFUL
;
303 End
= wcschr(Start
, L
'\\');
309 FoundObject
= ObpFindEntryDirectory(Object
, Start
, Attributes
);
310 if (FoundObject
== NULL
)
316 return STATUS_UNSUCCESSFUL
;
319 ObReferenceObjectByPointer(FoundObject
,
320 STANDARD_RIGHTS_REQUIRED
,
334 *NextObject
= FoundObject
;
336 return STATUS_SUCCESS
;
341 ObpCreateDirectory(PVOID ObjectBody
,
344 POBJECT_ATTRIBUTES ObjectAttributes
)
346 PDIRECTORY_OBJECT DirectoryObject
= (PDIRECTORY_OBJECT
)ObjectBody
;
348 DPRINT("ObpCreateDirectory(ObjectBody %x, Parent %x, RemainingPath %S)\n",
349 ObjectBody
, Parent
, RemainingPath
);
351 if (RemainingPath
!= NULL
&& wcschr(RemainingPath
+1, '\\') != NULL
)
353 return(STATUS_UNSUCCESSFUL
);
356 InitializeListHead(&DirectoryObject
->head
);
357 KeInitializeSpinLock(&DirectoryObject
->Lock
);
359 return(STATUS_SUCCESS
);
366 * FUNCTION: Initialize the object manager namespace
369 OBJECT_ATTRIBUTES ObjectAttributes
;
371 SECURITY_DESCRIPTOR SecurityDescriptor
;
373 /* Initialize the security descriptor cache */
376 /* create 'directory' object type */
377 ObDirectoryType
= ExAllocatePool(NonPagedPool
,sizeof(OBJECT_TYPE
));
379 ObDirectoryType
->Tag
= TAG('D', 'I', 'R', 'T');
380 ObDirectoryType
->TotalObjects
= 0;
381 ObDirectoryType
->TotalHandles
= 0;
382 ObDirectoryType
->PeakObjects
= 0;
383 ObDirectoryType
->PeakHandles
= 0;
384 ObDirectoryType
->PagedPoolCharge
= 0;
385 ObDirectoryType
->NonpagedPoolCharge
= sizeof(DIRECTORY_OBJECT
);
386 ObDirectoryType
->Mapping
= &ObpDirectoryMapping
;
387 ObDirectoryType
->Dump
= NULL
;
388 ObDirectoryType
->Open
= NULL
;
389 ObDirectoryType
->Close
= NULL
;
390 ObDirectoryType
->Delete
= NULL
;
391 ObDirectoryType
->Parse
= ObpParseDirectory
;
392 ObDirectoryType
->Security
= NULL
;
393 ObDirectoryType
->QueryName
= NULL
;
394 ObDirectoryType
->OkayToClose
= NULL
;
395 ObDirectoryType
->Create
= ObpCreateDirectory
;
396 ObDirectoryType
->DuplicationNotify
= NULL
;
398 RtlInitUnicodeString(&ObDirectoryType
->TypeName
,
401 /* create 'type' object type*/
402 ObTypeObjectType
= ExAllocatePool(NonPagedPool
,sizeof(OBJECT_TYPE
));
404 ObTypeObjectType
->Tag
= TAG('T', 'y', 'p', 'T');
405 ObTypeObjectType
->TotalObjects
= 0;
406 ObTypeObjectType
->TotalHandles
= 0;
407 ObTypeObjectType
->PeakObjects
= 0;
408 ObTypeObjectType
->PeakHandles
= 0;
409 ObTypeObjectType
->PagedPoolCharge
= 0;
410 ObTypeObjectType
->NonpagedPoolCharge
= sizeof(TYPE_OBJECT
);
411 ObTypeObjectType
->Mapping
= &ObpTypeMapping
;
412 ObTypeObjectType
->Dump
= NULL
;
413 ObTypeObjectType
->Open
= NULL
;
414 ObTypeObjectType
->Close
= NULL
;
415 ObTypeObjectType
->Delete
= NULL
;
416 ObTypeObjectType
->Parse
= NULL
;
417 ObTypeObjectType
->Security
= NULL
;
418 ObTypeObjectType
->QueryName
= NULL
;
419 ObTypeObjectType
->OkayToClose
= NULL
;
420 ObTypeObjectType
->Create
= NULL
;
421 ObTypeObjectType
->DuplicationNotify
= NULL
;
423 RtlInitUnicodeString(&ObTypeObjectType
->TypeName
,
426 /* Create security descriptor */
427 RtlCreateSecurityDescriptor(&SecurityDescriptor
,
428 SECURITY_DESCRIPTOR_REVISION1
);
430 RtlSetOwnerSecurityDescriptor(&SecurityDescriptor
,
434 RtlSetGroupSecurityDescriptor(&SecurityDescriptor
,
438 RtlSetDaclSecurityDescriptor(&SecurityDescriptor
,
443 /* Create root directory */
444 InitializeObjectAttributes(&ObjectAttributes
,
448 &SecurityDescriptor
);
449 ObCreateObject(KernelMode
,
454 sizeof(DIRECTORY_OBJECT
),
457 (PVOID
*)&NameSpaceRoot
);
459 /* Create '\ObjectTypes' directory */
460 RtlRosInitUnicodeStringFromLiteral(&Name
,
462 InitializeObjectAttributes(&ObjectAttributes
,
466 &SecurityDescriptor
);
467 ObCreateObject(KernelMode
,
472 sizeof(DIRECTORY_OBJECT
),
477 ObpCreateTypeObject(ObDirectoryType
);
478 ObpCreateTypeObject(ObTypeObjectType
);
480 /* Create 'symbolic link' object type */
481 ObInitSymbolicLinkImplementation();
483 /* FIXME: Hack Hack! */
484 ObSystemDeviceMap
= ExAllocatePoolWithTag(NonPagedPool
, sizeof(*ObSystemDeviceMap
), TAG('O', 'b', 'D', 'm'));
485 RtlZeroMemory(ObSystemDeviceMap
, sizeof(*ObSystemDeviceMap
));
490 ObpCreateTypeObject(POBJECT_TYPE ObjectType
)
492 OBJECT_ATTRIBUTES ObjectAttributes
;
493 WCHAR NameString
[120];
494 PTYPE_OBJECT TypeObject
= NULL
;
498 DPRINT("ObpCreateTypeObject(ObjectType: %wZ)\n", &ObjectType
->TypeName
);
499 wcscpy(NameString
, L
"\\ObjectTypes\\");
500 wcscat(NameString
, ObjectType
->TypeName
.Buffer
);
501 RtlInitUnicodeString(&Name
,
504 InitializeObjectAttributes(&ObjectAttributes
,
509 Status
= ObCreateObject(KernelMode
,
517 (PVOID
*)&TypeObject
);
518 if (NT_SUCCESS(Status
))
520 TypeObject
->ObjectType
= ObjectType
;
523 return(STATUS_SUCCESS
);