1 /* $Id: namespc.c,v 1.45 2004/07/16 17:19:15 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 #define NTOS_MODE_KERNEL
17 #include <internal/ob.h>
18 #include <internal/io.h>
19 #include <internal/pool.h>
20 #include <rosrtl/string.h>
23 #include <internal/debug.h>
26 /* GLOBALS ****************************************************************/
28 POBJECT_TYPE ObDirectoryType
= NULL
;
29 POBJECT_TYPE ObTypeObjectType
= NULL
;
31 PDIRECTORY_OBJECT NameSpaceRoot
= NULL
;
33 static GENERIC_MAPPING ObpDirectoryMapping
= {
34 STANDARD_RIGHTS_READ
|DIRECTORY_QUERY
|DIRECTORY_TRAVERSE
,
35 STANDARD_RIGHTS_WRITE
|DIRECTORY_CREATE_OBJECT
|DIRECTORY_CREATE_SUBDIRECTORY
,
36 STANDARD_RIGHTS_EXECUTE
|DIRECTORY_QUERY
|DIRECTORY_TRAVERSE
,
37 DIRECTORY_ALL_ACCESS
};
39 static GENERIC_MAPPING ObpTypeMapping
= {
41 STANDARD_RIGHTS_WRITE
,
42 STANDARD_RIGHTS_EXECUTE
,
45 /* 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
);
95 /**********************************************************************
100 * Obtain a handle to an existing object.
124 ObOpenObjectByName(IN POBJECT_ATTRIBUTES ObjectAttributes
,
125 IN POBJECT_TYPE ObjectType
,
126 IN OUT PVOID ParseContext
,
127 IN KPROCESSOR_MODE AccessMode
,
128 IN ACCESS_MASK DesiredAccess
,
129 IN PACCESS_STATE PassedAccessState
,
132 UNICODE_STRING RemainingPath
;
136 DPRINT("ObOpenObjectByName(...)\n");
138 Status
= ObFindObject(ObjectAttributes
,
142 if (!NT_SUCCESS(Status
))
144 DPRINT("ObFindObject() failed (Status %lx)\n", Status
);
148 if (RemainingPath
.Buffer
!= NULL
||
151 RtlFreeUnicodeString(&RemainingPath
);
152 return STATUS_UNSUCCESSFUL
;
155 Status
= ObCreateHandle(PsGetCurrentProcess(),
161 ObDereferenceObject(Object
);
162 RtlFreeUnicodeString(&RemainingPath
);
169 ObpAddEntryDirectory(PDIRECTORY_OBJECT Parent
,
170 POBJECT_HEADER Header
,
173 * FUNCTION: Add an entry to a namespace directory
175 * Parent = directory to add in
176 * Header = Header of the object to add the entry for
177 * Name = Name to give the entry
182 RtlCreateUnicodeString(&Header
->Name
, Name
);
183 Header
->Parent
= Parent
;
185 KeAcquireSpinLock(&Parent
->Lock
, &oldlvl
);
186 InsertTailList(&Parent
->head
, &Header
->Entry
);
187 KeReleaseSpinLock(&Parent
->Lock
, oldlvl
);
192 ObpRemoveEntryDirectory(POBJECT_HEADER Header
)
194 * FUNCTION: Remove an entry from a namespace directory
196 * Header = Header of the object to remove
201 DPRINT("ObpRemoveEntryDirectory(Header %x)\n",Header
);
203 KeAcquireSpinLock(&(Header
->Parent
->Lock
),&oldlvl
);
204 RemoveEntryList(&(Header
->Entry
));
205 KeReleaseSpinLock(&(Header
->Parent
->Lock
),oldlvl
);
210 ObpFindEntryDirectory(PDIRECTORY_OBJECT DirectoryObject
,
214 PLIST_ENTRY current
= DirectoryObject
->head
.Flink
;
215 POBJECT_HEADER current_obj
;
217 DPRINT("ObFindEntryDirectory(dir %x, name %S)\n",DirectoryObject
, Name
);
221 return(DirectoryObject
);
223 if (Name
[0]=='.' && Name
[1]==0)
225 return(DirectoryObject
);
227 if (Name
[0]=='.' && Name
[1]=='.' && Name
[2]==0)
229 return(BODY_TO_HEADER(DirectoryObject
)->Parent
);
231 while (current
!=(&(DirectoryObject
->head
)))
233 current_obj
= CONTAINING_RECORD(current
,OBJECT_HEADER
,Entry
);
234 DPRINT(" Scanning: %S for: %S\n",current_obj
->Name
.Buffer
, Name
);
235 if (Attributes
& OBJ_CASE_INSENSITIVE
)
237 if (_wcsicmp(current_obj
->Name
.Buffer
, Name
)==0)
239 DPRINT("Found it %x\n",HEADER_TO_BODY(current_obj
));
240 return(HEADER_TO_BODY(current_obj
));
245 if ( wcscmp(current_obj
->Name
.Buffer
, Name
)==0)
247 DPRINT("Found it %x\n",HEADER_TO_BODY(current_obj
));
248 return(HEADER_TO_BODY(current_obj
));
251 current
= current
->Flink
;
253 DPRINT(" Not Found: %s() = NULL\n",__FUNCTION__
);
259 ObpParseDirectory(PVOID Object
,
261 PUNICODE_STRING FullPath
,
269 DPRINT("ObpParseDirectory(Object %x, Path %x, *Path %S)\n",
276 return STATUS_UNSUCCESSFUL
;
283 End
= wcschr(Start
, L
'\\');
289 FoundObject
= ObpFindEntryDirectory(Object
, Start
, Attributes
);
290 if (FoundObject
== NULL
)
296 return STATUS_UNSUCCESSFUL
;
299 ObReferenceObjectByPointer(FoundObject
,
300 STANDARD_RIGHTS_REQUIRED
,
314 *NextObject
= FoundObject
;
316 return STATUS_SUCCESS
;
321 ObpCreateDirectory(PVOID ObjectBody
,
324 POBJECT_ATTRIBUTES ObjectAttributes
)
326 PDIRECTORY_OBJECT DirectoryObject
= (PDIRECTORY_OBJECT
)ObjectBody
;
328 DPRINT("ObpCreateDirectory(ObjectBody %x, Parent %x, RemainingPath %S)\n",
329 ObjectBody
, Parent
, RemainingPath
);
331 if (RemainingPath
!= NULL
&& wcschr(RemainingPath
+1, '\\') != NULL
)
333 return(STATUS_UNSUCCESSFUL
);
336 InitializeListHead(&DirectoryObject
->head
);
337 KeInitializeSpinLock(&DirectoryObject
->Lock
);
339 return(STATUS_SUCCESS
);
346 * FUNCTION: Initialize the object manager namespace
349 OBJECT_ATTRIBUTES ObjectAttributes
;
352 /* Initialize the security descriptor cache */
355 /* create 'directory' object type */
356 ObDirectoryType
= ExAllocatePool(NonPagedPool
,sizeof(OBJECT_TYPE
));
358 ObDirectoryType
->Tag
= TAG('D', 'I', 'R', 'T');
359 ObDirectoryType
->TotalObjects
= 0;
360 ObDirectoryType
->TotalHandles
= 0;
361 ObDirectoryType
->MaxObjects
= ULONG_MAX
;
362 ObDirectoryType
->MaxHandles
= ULONG_MAX
;
363 ObDirectoryType
->PagedPoolCharge
= 0;
364 ObDirectoryType
->NonpagedPoolCharge
= sizeof(DIRECTORY_OBJECT
);
365 ObDirectoryType
->Mapping
= &ObpDirectoryMapping
;
366 ObDirectoryType
->Dump
= NULL
;
367 ObDirectoryType
->Open
= NULL
;
368 ObDirectoryType
->Close
= NULL
;
369 ObDirectoryType
->Delete
= NULL
;
370 ObDirectoryType
->Parse
= ObpParseDirectory
;
371 ObDirectoryType
->Security
= NULL
;
372 ObDirectoryType
->QueryName
= NULL
;
373 ObDirectoryType
->OkayToClose
= NULL
;
374 ObDirectoryType
->Create
= ObpCreateDirectory
;
375 ObDirectoryType
->DuplicationNotify
= NULL
;
377 RtlRosInitUnicodeStringFromLiteral(&ObDirectoryType
->TypeName
,
380 /* create 'type' object type*/
381 ObTypeObjectType
= ExAllocatePool(NonPagedPool
,sizeof(OBJECT_TYPE
));
383 ObTypeObjectType
->Tag
= TAG('T', 'y', 'p', 'T');
384 ObTypeObjectType
->TotalObjects
= 0;
385 ObTypeObjectType
->TotalHandles
= 0;
386 ObTypeObjectType
->MaxObjects
= ULONG_MAX
;
387 ObTypeObjectType
->MaxHandles
= ULONG_MAX
;
388 ObTypeObjectType
->PagedPoolCharge
= 0;
389 ObTypeObjectType
->NonpagedPoolCharge
= sizeof(TYPE_OBJECT
);
390 ObTypeObjectType
->Mapping
= &ObpTypeMapping
;
391 ObTypeObjectType
->Dump
= NULL
;
392 ObTypeObjectType
->Open
= NULL
;
393 ObTypeObjectType
->Close
= NULL
;
394 ObTypeObjectType
->Delete
= NULL
;
395 ObTypeObjectType
->Parse
= NULL
;
396 ObTypeObjectType
->Security
= NULL
;
397 ObTypeObjectType
->QueryName
= NULL
;
398 ObTypeObjectType
->OkayToClose
= NULL
;
399 ObTypeObjectType
->Create
= NULL
;
400 ObTypeObjectType
->DuplicationNotify
= NULL
;
402 RtlRosInitUnicodeStringFromLiteral(&ObTypeObjectType
->TypeName
,
405 /* create root directory */
406 ObCreateObject(KernelMode
,
411 sizeof(DIRECTORY_OBJECT
),
414 (PVOID
*)&NameSpaceRoot
);
416 /* create '\ObjectTypes' directory */
417 RtlRosInitUnicodeStringFromLiteral(&Name
,
419 InitializeObjectAttributes(&ObjectAttributes
,
424 ObCreateObject(KernelMode
,
429 sizeof(DIRECTORY_OBJECT
),
434 ObpCreateTypeObject(ObDirectoryType
);
435 ObpCreateTypeObject(ObTypeObjectType
);
437 /* Create 'symbolic link' object type */
438 ObInitSymbolicLinkImplementation();
443 ObpCreateTypeObject(POBJECT_TYPE ObjectType
)
445 OBJECT_ATTRIBUTES ObjectAttributes
;
446 WCHAR NameString
[120];
447 PTYPE_OBJECT TypeObject
= NULL
;
451 DPRINT("ObpCreateTypeObject(ObjectType: %wZ)\n", &ObjectType
->TypeName
);
452 wcscpy(NameString
, L
"\\ObjectTypes\\");
453 wcscat(NameString
, ObjectType
->TypeName
.Buffer
);
454 RtlInitUnicodeString(&Name
,
457 InitializeObjectAttributes(&ObjectAttributes
,
462 Status
= ObCreateObject(KernelMode
,
470 (PVOID
*)&TypeObject
);
471 if (NT_SUCCESS(Status
))
473 TypeObject
->ObjectType
= ObjectType
;
476 return(STATUS_SUCCESS
);