2 * COPYRIGHT: See COPYING in the top level directory
3 * PROJECT: ReactOS kernel
4 * FILE: ntoskrnl/ob/namespc.c
5 * PURPOSE: Manages the system namespace
6 * PROGRAMMER: David Welch (welch@mcmail.com)
11 /* INCLUDES ***************************************************************/
14 #include <ddk/ntddk.h>
15 #include <internal/ob.h>
16 #include <internal/io.h>
19 #include <internal/debug.h>
21 /* GLOBALS ****************************************************************/
23 POBJECT_TYPE ObDirectoryType
= NULL
;
25 PDIRECTORY_OBJECT NameSpaceRoot
= NULL
;
27 /* FUNCTIONS **************************************************************/
30 ObReferenceObjectByName(PUNICODE_STRING ObjectPath
,
32 PACCESS_STATE PassedAccessState
,
33 ACCESS_MASK DesiredAccess
,
34 POBJECT_TYPE ObjectType
,
35 KPROCESSOR_MODE AccessMode
,
40 UNICODE_STRING RemainingPath
;
41 OBJECT_ATTRIBUTES ObjectAttributes
;
44 InitializeObjectAttributes(&ObjectAttributes
,
49 Status
= ObFindObject(&ObjectAttributes
,
53 if (!NT_SUCCESS(Status
))
58 DPRINT("RemainingPath.Buffer '%S' Object %p\n", RemainingPath
.Buffer
, Object
);
60 if (RemainingPath
.Buffer
!= NULL
|| Object
== NULL
)
63 DPRINT("Object %p\n", Object
);
65 RtlFreeUnicodeString (&RemainingPath
);
66 return(STATUS_UNSUCCESSFUL
);
69 RtlFreeUnicodeString (&RemainingPath
);
70 return(STATUS_SUCCESS
);
74 /**********************************************************************
79 * Obtain a handle to an existing object.
101 ObOpenObjectByName(POBJECT_ATTRIBUTES ObjectAttributes
,
102 POBJECT_TYPE ObjectType
,
103 ULONG Unknown3
, /* ?? */
104 KPROCESSOR_MODE AccessMode
,
105 ACCESS_MASK DesiredAccess
,
106 PACCESS_STATE PassedAccessState
,
109 UNICODE_STRING RemainingPath
;
113 DPRINT("ObOpenObjectByName()\n");
115 Status
= ObFindObject(ObjectAttributes
,
119 if (!NT_SUCCESS(Status
))
124 if (RemainingPath
.Buffer
!= NULL
||
127 RtlFreeUnicodeString(&RemainingPath
);
128 return STATUS_UNSUCCESSFUL
;
131 Status
= ObCreateHandle(PsGetCurrentProcess(),
137 ObDereferenceObject(Object
);
138 RtlFreeUnicodeString(&RemainingPath
);
144 VOID STDCALL
ObAddEntryDirectory(PDIRECTORY_OBJECT Parent
,
148 * FUNCTION: Add an entry to a namespace directory
150 * parent = directory to add in
151 * name = Name to give the entry
152 * Object = Header of the object to add the entry for
156 POBJECT_HEADER Header
= BODY_TO_HEADER(Object
);
158 RtlCreateUnicodeString(&Header
->Name
, Name
);
159 Header
->Parent
= Parent
;
161 KeAcquireSpinLock(&Parent
->Lock
, &oldlvl
);
162 InsertTailList(&Parent
->head
, &Header
->Entry
);
163 KeReleaseSpinLock(&Parent
->Lock
, oldlvl
);
166 PVOID
ObpFindEntryDirectory(PDIRECTORY_OBJECT DirectoryObject
,
170 PLIST_ENTRY current
= DirectoryObject
->head
.Flink
;
171 POBJECT_HEADER current_obj
;
173 DPRINT("ObFindEntryDirectory(dir %x, name %S)\n",DirectoryObject
, Name
);
177 return(DirectoryObject
);
179 if (Name
[0]=='.' && Name
[1]==0)
181 return(DirectoryObject
);
183 if (Name
[0]=='.' && Name
[1]=='.' && Name
[2]==0)
185 return(BODY_TO_HEADER(DirectoryObject
)->Parent
);
187 while (current
!=(&(DirectoryObject
->head
)))
189 current_obj
= CONTAINING_RECORD(current
,OBJECT_HEADER
,Entry
);
190 DPRINT("Scanning %S %S\n",current_obj
->Name
.Buffer
, Name
);
191 if (Attributes
& OBJ_CASE_INSENSITIVE
)
193 if (_wcsicmp(current_obj
->Name
.Buffer
, Name
)==0)
195 DPRINT("Found it %x\n",HEADER_TO_BODY(current_obj
));
196 return(HEADER_TO_BODY(current_obj
));
201 if ( wcscmp(current_obj
->Name
.Buffer
, Name
)==0)
203 DPRINT("Found it %x\n",HEADER_TO_BODY(current_obj
));
204 return(HEADER_TO_BODY(current_obj
));
207 current
= current
->Flink
;
209 DPRINT("%s() = NULL\n",__FUNCTION__
);
217 PUNICODE_STRING FullPath
,
219 POBJECT_TYPE ObjectType
225 DPRINT("ObpParseDirectory(Object %x, Path %x, *Path %S)\n",
232 return STATUS_UNSUCCESSFUL
;
235 end
= wcschr((*Path
)+1, '\\');
241 FoundObject
= ObpFindEntryDirectory(Object
, (*Path
)+1, 0);
243 if (FoundObject
== NULL
)
249 return STATUS_UNSUCCESSFUL
;
252 ObReferenceObjectByPointer(FoundObject
,
253 STANDARD_RIGHTS_REQUIRED
,
267 *NextObject
= FoundObject
;
269 return STATUS_SUCCESS
;
272 NTSTATUS
ObpCreateDirectory(PVOID ObjectBody
,
275 POBJECT_ATTRIBUTES ObjectAttributes
)
277 PDIRECTORY_OBJECT DirectoryObject
= (PDIRECTORY_OBJECT
)ObjectBody
;
279 DPRINT("ObpCreateDirectory(ObjectBody %x, Parent %x, RemainingPath %S)\n",
280 ObjectBody
, Parent
, RemainingPath
);
282 if (RemainingPath
!= NULL
&& wcschr(RemainingPath
+1, '\\') != NULL
)
284 return(STATUS_UNSUCCESSFUL
);
287 if (Parent
!= NULL
&& RemainingPath
!= NULL
)
289 ObAddEntryDirectory(Parent
, ObjectBody
, RemainingPath
+1);
291 InitializeListHead(&DirectoryObject
->head
);
292 KeInitializeSpinLock(&DirectoryObject
->Lock
);
293 return(STATUS_SUCCESS
);
298 * FUNCTION: Initialize the object manager namespace
301 ANSI_STRING AnsiString
;
303 ObDirectoryType
= ExAllocatePool(NonPagedPool
,sizeof(OBJECT_TYPE
));
305 ObDirectoryType
->TotalObjects
= 0;
306 ObDirectoryType
->TotalHandles
= 0;
307 ObDirectoryType
->MaxObjects
= ULONG_MAX
;
308 ObDirectoryType
->MaxHandles
= ULONG_MAX
;
309 ObDirectoryType
->PagedPoolCharge
= 0;
310 ObDirectoryType
->NonpagedPoolCharge
= sizeof(DIRECTORY_OBJECT
);
311 ObDirectoryType
->Dump
= NULL
;
312 ObDirectoryType
->Open
= NULL
;
313 ObDirectoryType
->Close
= NULL
;
314 ObDirectoryType
->Delete
= NULL
;
315 ObDirectoryType
->Parse
= ObpParseDirectory
;
316 ObDirectoryType
->Security
= NULL
;
317 ObDirectoryType
->QueryName
= NULL
;
318 ObDirectoryType
->OkayToClose
= NULL
;
319 ObDirectoryType
->Create
= ObpCreateDirectory
;
321 RtlInitAnsiString(&AnsiString
,"Directory");
322 RtlAnsiStringToUnicodeString(&ObDirectoryType
->TypeName
,
325 NameSpaceRoot
= ObCreateObject(NULL
,
326 STANDARD_RIGHTS_REQUIRED
,
331 VOID
ObRemoveEntry(POBJECT_HEADER Header
)
335 DPRINT("ObRemoveEntry(Header %x)\n",Header
);
337 KeAcquireSpinLock(&(Header
->Parent
->Lock
),&oldlvl
);
338 RemoveEntryList(&(Header
->Entry
));
339 KeReleaseSpinLock(&(Header
->Parent
->Lock
),oldlvl
);