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
;
59 InitializeObjectAttributes(&ObjectAttributes
,
64 Status
= ObFindObject(&ObjectAttributes
,
68 if (!NT_SUCCESS(Status
))
73 DPRINT("RemainingPath.Buffer '%S' Object %p\n", RemainingPath
.Buffer
, Object
);
75 if (RemainingPath
.Buffer
!= NULL
|| Object
== NULL
)
78 DPRINT("Object %p\n", Object
);
80 RtlFreeUnicodeString (&RemainingPath
);
81 return(STATUS_OBJECT_NAME_NOT_FOUND
);
84 RtlFreeUnicodeString (&RemainingPath
);
85 return(STATUS_SUCCESS
);
89 /**********************************************************************
94 * Obtain a handle to an existing object.
118 ObOpenObjectByName(IN POBJECT_ATTRIBUTES ObjectAttributes
,
119 IN POBJECT_TYPE ObjectType
,
120 IN OUT PVOID ParseContext
,
121 IN KPROCESSOR_MODE AccessMode
,
122 IN ACCESS_MASK DesiredAccess
,
123 IN PACCESS_STATE PassedAccessState
,
126 UNICODE_STRING RemainingPath
;
130 DPRINT("ObOpenObjectByName(...)\n");
132 Status
= ObFindObject(ObjectAttributes
,
136 if (!NT_SUCCESS(Status
))
138 DPRINT("ObFindObject() failed (Status %lx)\n", Status
);
142 if (RemainingPath
.Buffer
!= NULL
||
145 RtlFreeUnicodeString(&RemainingPath
);
146 return STATUS_UNSUCCESSFUL
;
149 Status
= ObCreateHandle(PsGetCurrentProcess(),
155 ObDereferenceObject(Object
);
156 RtlFreeUnicodeString(&RemainingPath
);
163 ObQueryDeviceMapInformation(PEPROCESS Process
,
164 PPROCESS_DEVICEMAP_INFORMATION DeviceMapInfo
)
169 * FIXME: This is an ugly hack for now, to always return the System Device Map
170 * instead of returning the Process Device Map. Not important yet since we don't use it
173 /* FIXME: Acquire the DeviceMap Spinlock */
174 // KeAcquireSpinLock(DeviceMap->Lock, &OldIrql);
177 DeviceMapInfo
->Query
.DriveMap
= ObSystemDeviceMap
->DriveMap
;
178 RtlMoveMemory(DeviceMapInfo
->Query
.DriveType
, ObSystemDeviceMap
->DriveType
, sizeof(ObSystemDeviceMap
->DriveType
));
180 /* FIXME: Release the DeviceMap Spinlock */
181 // KeReleasepinLock(DeviceMap->Lock, OldIrql);
185 ObpAddEntryDirectory(PDIRECTORY_OBJECT Parent
,
186 POBJECT_HEADER Header
,
189 * FUNCTION: Add an entry to a namespace directory
191 * Parent = directory to add in
192 * Header = Header of the object to add the entry for
193 * Name = Name to give the entry
198 RtlCreateUnicodeString(&Header
->Name
, Name
);
199 Header
->Parent
= Parent
;
201 KeAcquireSpinLock(&Parent
->Lock
, &oldlvl
);
202 InsertTailList(&Parent
->head
, &Header
->Entry
);
203 KeReleaseSpinLock(&Parent
->Lock
, oldlvl
);
208 ObpRemoveEntryDirectory(POBJECT_HEADER Header
)
210 * FUNCTION: Remove an entry from a namespace directory
212 * Header = Header of the object to remove
217 DPRINT("ObpRemoveEntryDirectory(Header %x)\n",Header
);
219 KeAcquireSpinLock(&(Header
->Parent
->Lock
),&oldlvl
);
220 RemoveEntryList(&(Header
->Entry
));
221 KeReleaseSpinLock(&(Header
->Parent
->Lock
),oldlvl
);
226 ObpFindEntryDirectory(PDIRECTORY_OBJECT DirectoryObject
,
230 PLIST_ENTRY current
= DirectoryObject
->head
.Flink
;
231 POBJECT_HEADER current_obj
;
233 DPRINT("ObFindEntryDirectory(dir %x, name %S)\n",DirectoryObject
, Name
);
237 return(DirectoryObject
);
239 if (Name
[0]=='.' && Name
[1]==0)
241 return(DirectoryObject
);
243 if (Name
[0]=='.' && Name
[1]=='.' && Name
[2]==0)
245 return(BODY_TO_HEADER(DirectoryObject
)->Parent
);
247 while (current
!=(&(DirectoryObject
->head
)))
249 current_obj
= CONTAINING_RECORD(current
,OBJECT_HEADER
,Entry
);
250 DPRINT(" Scanning: %S for: %S\n",current_obj
->Name
.Buffer
, Name
);
251 if (Attributes
& OBJ_CASE_INSENSITIVE
)
253 if (_wcsicmp(current_obj
->Name
.Buffer
, Name
)==0)
255 DPRINT("Found it %x\n",HEADER_TO_BODY(current_obj
));
256 return(HEADER_TO_BODY(current_obj
));
261 if ( wcscmp(current_obj
->Name
.Buffer
, Name
)==0)
263 DPRINT("Found it %x\n",HEADER_TO_BODY(current_obj
));
264 return(HEADER_TO_BODY(current_obj
));
267 current
= current
->Flink
;
269 DPRINT(" Not Found: %s() = NULL\n",__FUNCTION__
);
275 ObpParseDirectory(PVOID Object
,
277 PUNICODE_STRING FullPath
,
285 DPRINT("ObpParseDirectory(Object %x, Path %x, *Path %S)\n",
292 return STATUS_UNSUCCESSFUL
;
299 End
= wcschr(Start
, L
'\\');
305 FoundObject
= ObpFindEntryDirectory(Object
, Start
, Attributes
);
306 if (FoundObject
== NULL
)
312 return STATUS_UNSUCCESSFUL
;
315 ObReferenceObjectByPointer(FoundObject
,
316 STANDARD_RIGHTS_REQUIRED
,
330 *NextObject
= FoundObject
;
332 return STATUS_SUCCESS
;
337 ObpCreateDirectory(PVOID ObjectBody
,
340 POBJECT_ATTRIBUTES ObjectAttributes
)
342 PDIRECTORY_OBJECT DirectoryObject
= (PDIRECTORY_OBJECT
)ObjectBody
;
344 DPRINT("ObpCreateDirectory(ObjectBody %x, Parent %x, RemainingPath %S)\n",
345 ObjectBody
, Parent
, RemainingPath
);
347 if (RemainingPath
!= NULL
&& wcschr(RemainingPath
+1, '\\') != NULL
)
349 return(STATUS_UNSUCCESSFUL
);
352 InitializeListHead(&DirectoryObject
->head
);
353 KeInitializeSpinLock(&DirectoryObject
->Lock
);
355 return(STATUS_SUCCESS
);
362 * FUNCTION: Initialize the object manager namespace
365 OBJECT_ATTRIBUTES ObjectAttributes
;
367 SECURITY_DESCRIPTOR SecurityDescriptor
;
369 /* Initialize the security descriptor cache */
372 /* create 'directory' object type */
373 ObDirectoryType
= ExAllocatePool(NonPagedPool
,sizeof(OBJECT_TYPE
));
375 ObDirectoryType
->Tag
= TAG('D', 'I', 'R', 'T');
376 ObDirectoryType
->TotalObjects
= 0;
377 ObDirectoryType
->TotalHandles
= 0;
378 ObDirectoryType
->PeakObjects
= 0;
379 ObDirectoryType
->PeakHandles
= 0;
380 ObDirectoryType
->PagedPoolCharge
= 0;
381 ObDirectoryType
->NonpagedPoolCharge
= sizeof(DIRECTORY_OBJECT
);
382 ObDirectoryType
->Mapping
= &ObpDirectoryMapping
;
383 ObDirectoryType
->Dump
= NULL
;
384 ObDirectoryType
->Open
= NULL
;
385 ObDirectoryType
->Close
= NULL
;
386 ObDirectoryType
->Delete
= NULL
;
387 ObDirectoryType
->Parse
= ObpParseDirectory
;
388 ObDirectoryType
->Security
= NULL
;
389 ObDirectoryType
->QueryName
= NULL
;
390 ObDirectoryType
->OkayToClose
= NULL
;
391 ObDirectoryType
->Create
= ObpCreateDirectory
;
392 ObDirectoryType
->DuplicationNotify
= NULL
;
394 RtlRosInitUnicodeStringFromLiteral(&ObDirectoryType
->TypeName
,
397 /* create 'type' object type*/
398 ObTypeObjectType
= ExAllocatePool(NonPagedPool
,sizeof(OBJECT_TYPE
));
400 ObTypeObjectType
->Tag
= TAG('T', 'y', 'p', 'T');
401 ObTypeObjectType
->TotalObjects
= 0;
402 ObTypeObjectType
->TotalHandles
= 0;
403 ObTypeObjectType
->PeakObjects
= 0;
404 ObTypeObjectType
->PeakHandles
= 0;
405 ObTypeObjectType
->PagedPoolCharge
= 0;
406 ObTypeObjectType
->NonpagedPoolCharge
= sizeof(TYPE_OBJECT
);
407 ObTypeObjectType
->Mapping
= &ObpTypeMapping
;
408 ObTypeObjectType
->Dump
= NULL
;
409 ObTypeObjectType
->Open
= NULL
;
410 ObTypeObjectType
->Close
= NULL
;
411 ObTypeObjectType
->Delete
= NULL
;
412 ObTypeObjectType
->Parse
= NULL
;
413 ObTypeObjectType
->Security
= NULL
;
414 ObTypeObjectType
->QueryName
= NULL
;
415 ObTypeObjectType
->OkayToClose
= NULL
;
416 ObTypeObjectType
->Create
= NULL
;
417 ObTypeObjectType
->DuplicationNotify
= NULL
;
419 RtlRosInitUnicodeStringFromLiteral(&ObTypeObjectType
->TypeName
,
422 /* Create security descriptor */
423 RtlCreateSecurityDescriptor(&SecurityDescriptor
,
424 SECURITY_DESCRIPTOR_REVISION1
);
426 RtlSetOwnerSecurityDescriptor(&SecurityDescriptor
,
430 RtlSetGroupSecurityDescriptor(&SecurityDescriptor
,
434 RtlSetDaclSecurityDescriptor(&SecurityDescriptor
,
439 /* Create root directory */
440 InitializeObjectAttributes(&ObjectAttributes
,
444 &SecurityDescriptor
);
445 ObCreateObject(KernelMode
,
450 sizeof(DIRECTORY_OBJECT
),
453 (PVOID
*)&NameSpaceRoot
);
455 /* Create '\ObjectTypes' directory */
456 RtlRosInitUnicodeStringFromLiteral(&Name
,
458 InitializeObjectAttributes(&ObjectAttributes
,
462 &SecurityDescriptor
);
463 ObCreateObject(KernelMode
,
468 sizeof(DIRECTORY_OBJECT
),
473 ObpCreateTypeObject(ObDirectoryType
);
474 ObpCreateTypeObject(ObTypeObjectType
);
476 /* Create 'symbolic link' object type */
477 ObInitSymbolicLinkImplementation();
479 /* FIXME: Hack Hack! */
480 ObSystemDeviceMap
= ExAllocatePoolWithTag(NonPagedPool
, sizeof(*ObSystemDeviceMap
), TAG('O', 'b', 'D', 'm'));
481 RtlZeroMemory(ObSystemDeviceMap
, sizeof(*ObSystemDeviceMap
));
486 ObpCreateTypeObject(POBJECT_TYPE ObjectType
)
488 OBJECT_ATTRIBUTES ObjectAttributes
;
489 WCHAR NameString
[120];
490 PTYPE_OBJECT TypeObject
= NULL
;
494 DPRINT("ObpCreateTypeObject(ObjectType: %wZ)\n", &ObjectType
->TypeName
);
495 wcscpy(NameString
, L
"\\ObjectTypes\\");
496 wcscat(NameString
, ObjectType
->TypeName
.Buffer
);
497 RtlInitUnicodeString(&Name
,
500 InitializeObjectAttributes(&ObjectAttributes
,
505 Status
= ObCreateObject(KernelMode
,
513 (PVOID
*)&TypeObject
);
514 if (NT_SUCCESS(Status
))
516 TypeObject
->ObjectType
= ObjectType
;
519 return(STATUS_SUCCESS
);