2 * PROJECT: ReactOS Kernel
3 * LICENSE: GPL - See COPYING in the top level directory
4 * FILE: ntoskrnl/io/iomgr/file.c
5 * PURPOSE: Functions that deal with managing the FILE_OBJECT itself.
6 * PROGRAMMERS: Alex Ionescu (alex.ionescu@reactos.org)
9 * Filip Navara (navaraf@reactos.org)
13 /* INCLUDES *****************************************************************/
19 extern ERESOURCE IopSecurityResource
;
21 /* PRIVATE FUNCTIONS *********************************************************/
25 IopCheckBackupRestorePrivilege(IN PACCESS_STATE AccessState
,
26 IN OUT PULONG CreateOptions
,
27 IN KPROCESSOR_MODE PreviousMode
,
30 ACCESS_MASK DesiredAccess
, ReadAccess
, WriteAccess
;
31 PRIVILEGE_SET Privileges
;
32 BOOLEAN AccessGranted
, HaveBackupPriv
= FALSE
, CheckRestore
= FALSE
;
35 /* Don't do anything if privileges were checked already */
36 if (AccessState
->Flags
& SE_BACKUP_PRIVILEGES_CHECKED
) return;
38 /* Check if the file was actually opened for backup purposes */
39 if (*CreateOptions
& FILE_OPEN_FOR_BACKUP_INTENT
)
41 /* Set the check flag since were doing it now */
42 AccessState
->Flags
|= SE_BACKUP_PRIVILEGES_CHECKED
;
44 /* Set the access masks required */
45 ReadAccess
= READ_CONTROL
|
46 ACCESS_SYSTEM_SECURITY
|
49 WriteAccess
= WRITE_DAC
|
51 ACCESS_SYSTEM_SECURITY
|
54 FILE_ADD_SUBDIRECTORY
|
56 DesiredAccess
= AccessState
->RemainingDesiredAccess
;
58 /* Check if desired access was the maximum */
59 if (DesiredAccess
& MAXIMUM_ALLOWED
)
61 /* Then add all the access masks required */
62 DesiredAccess
|= (ReadAccess
| WriteAccess
);
65 /* Check if the file already exists */
66 if (Disposition
& FILE_OPEN
)
68 /* Check if desired access has the read mask */
69 if (ReadAccess
& DesiredAccess
)
71 /* Setup the privilege check lookup */
72 Privileges
.PrivilegeCount
= 1;
73 Privileges
.Control
= PRIVILEGE_SET_ALL_NECESSARY
;
74 Privileges
.Privilege
[0].Luid
= SeBackupPrivilege
;
75 Privileges
.Privilege
[0].Attributes
= 0;
76 AccessGranted
= SePrivilegeCheck(&Privileges
,
78 SubjectSecurityContext
,
82 /* Remember that backup was allowed */
83 HaveBackupPriv
= TRUE
;
85 /* Append the privileges and update the access state */
86 SeAppendPrivileges(AccessState
, &Privileges
);
87 AccessState
->PreviouslyGrantedAccess
|= (DesiredAccess
& ReadAccess
);
88 AccessState
->RemainingDesiredAccess
&= ~ReadAccess
;
89 DesiredAccess
&= ~ReadAccess
;
91 /* Set backup privilege for the token */
92 AccessState
->Flags
|= TOKEN_HAS_BACKUP_PRIVILEGE
;
98 /* Caller is creating the file, check restore privileges later */
102 /* Check if caller wants write access or if it's creating a file */
103 if ((WriteAccess
& DesiredAccess
) || (CheckRestore
))
105 /* Setup the privilege lookup and do it */
106 Privileges
.PrivilegeCount
= 1;
107 Privileges
.Control
= PRIVILEGE_SET_ALL_NECESSARY
;
108 Privileges
.Privilege
[0].Luid
= SeRestorePrivilege
;
109 Privileges
.Privilege
[0].Attributes
= 0;
110 AccessGranted
= SePrivilegeCheck(&Privileges
,
111 &AccessState
->SubjectSecurityContext
,
115 /* Remember that privilege was given */
116 HaveBackupPriv
= TRUE
;
118 /* Append the privileges and update the access state */
119 SeAppendPrivileges(AccessState
, &Privileges
);
120 AccessState
->PreviouslyGrantedAccess
|= (DesiredAccess
& WriteAccess
);
121 AccessState
->RemainingDesiredAccess
&= ~WriteAccess
;
123 /* Set restore privilege for the token */
124 AccessState
->Flags
|= TOKEN_HAS_RESTORE_PRIVILEGE
;
128 /* If we don't have the privilege, remove the option */
129 if (!HaveBackupPriv
) *CreateOptions
&= ~FILE_OPEN_FOR_BACKUP_INTENT
;
135 IopCheckDeviceAndDriver(IN POPEN_PACKET OpenPacket
,
136 IN PDEVICE_OBJECT DeviceObject
)
138 /* Make sure the object is valid */
139 if ((IoGetDevObjExtension(DeviceObject
)->ExtensionFlags
&
140 (DOE_UNLOAD_PENDING
|
143 DOE_REMOVE_PROCESSED
)) ||
144 (DeviceObject
->Flags
& DO_DEVICE_INITIALIZING
))
146 /* It's unloading or initializing, so fail */
147 DPRINT1("You are seeing this because the following ROS driver: %wZ\n"
148 " sucks. Please fix it's AddDevice Routine\n",
149 &DeviceObject
->DriverObject
->DriverName
);
150 return STATUS_NO_SUCH_DEVICE
;
152 else if ((DeviceObject
->Flags
& DO_EXCLUSIVE
) &&
153 (DeviceObject
->ReferenceCount
) &&
154 !(OpenPacket
->RelatedFileObject
) &&
155 !(OpenPacket
->Options
& IO_ATTACH_DEVICE
))
157 return STATUS_ACCESS_DENIED
;
162 /* Increase reference count */
163 InterlockedIncrement(&DeviceObject
->ReferenceCount
);
164 return STATUS_SUCCESS
;
170 IopDoNameTransmogrify(IN PIRP Irp
,
171 IN PFILE_OBJECT FileObject
,
172 IN PREPARSE_DATA_BUFFER DataBuffer
)
176 USHORT RequiredLength
;
181 ASSERT(Irp
->IoStatus
.Status
== STATUS_REPARSE
);
182 ASSERT(Irp
->IoStatus
.Information
== IO_REPARSE_TAG_MOUNT_POINT
);
183 ASSERT(Irp
->Tail
.Overlay
.AuxiliaryBuffer
!= NULL
);
184 ASSERT(DataBuffer
!= NULL
);
185 ASSERT(DataBuffer
->ReparseTag
== IO_REPARSE_TAG_MOUNT_POINT
);
186 ASSERT(DataBuffer
->ReparseDataLength
< MAXIMUM_REPARSE_DATA_BUFFER_SIZE
);
187 ASSERT(DataBuffer
->Reserved
< MAXIMUM_REPARSE_DATA_BUFFER_SIZE
);
189 /* First of all, validate data */
190 if (DataBuffer
->ReparseDataLength
< REPARSE_DATA_BUFFER_HEADER_SIZE
||
191 (DataBuffer
->SymbolicLinkReparseBuffer
.PrintNameLength
+
192 DataBuffer
->SymbolicLinkReparseBuffer
.SubstituteNameLength
+
193 FIELD_OFFSET(REPARSE_DATA_BUFFER
, MountPointReparseBuffer
.PathBuffer
[0])) > MAXIMUM_REPARSE_DATA_BUFFER_SIZE
)
195 Irp
->IoStatus
.Status
= STATUS_IO_REPARSE_DATA_INVALID
;
198 /* Everything went right */
199 if (NT_SUCCESS(Irp
->IoStatus
.Status
))
201 /* Compute buffer & length */
202 Buffer
= (PWSTR
)((ULONG_PTR
)DataBuffer
->MountPointReparseBuffer
.PathBuffer
+
203 DataBuffer
->MountPointReparseBuffer
.SubstituteNameOffset
);
204 Length
= DataBuffer
->MountPointReparseBuffer
.SubstituteNameLength
;
206 /* Check we don't overflow */
207 if (((ULONG
)MAXUSHORT
- DataBuffer
->Reserved
) <= (Length
+ sizeof(UNICODE_NULL
)))
209 Irp
->IoStatus
.Status
= STATUS_IO_REPARSE_DATA_INVALID
;
213 /* Compute how much mem we'll need */
214 RequiredLength
= DataBuffer
->Reserved
+ Length
+ sizeof(UNICODE_NULL
);
216 /* Check if FileObject can already hold what we need */
217 if (FileObject
->FileName
.MaximumLength
>= RequiredLength
)
219 NewBuffer
= FileObject
->FileName
.Buffer
;
223 /* Allocate otherwise */
224 NewBuffer
= ExAllocatePoolWithTag(PagedPool
, RequiredLength
, TAG_IO_NAME
);
225 if (NewBuffer
== NULL
)
227 Irp
->IoStatus
.Status
= STATUS_INSUFFICIENT_RESOURCES
;
233 /* Everything went right */
234 if (NT_SUCCESS(Irp
->IoStatus
.Status
))
237 if (DataBuffer
->Reserved
)
239 RtlMoveMemory((PWSTR
)((ULONG_PTR
)NewBuffer
+ Length
),
240 (PWSTR
)((ULONG_PTR
)FileObject
->FileName
.Buffer
+ FileObject
->FileName
.Length
- DataBuffer
->Reserved
),
241 DataBuffer
->Reserved
);
247 RtlCopyMemory(NewBuffer
, Buffer
, Length
);
250 /* And finally replace buffer if new one was allocated */
251 FileObject
->FileName
.Length
= RequiredLength
- sizeof(UNICODE_NULL
);
252 if (NewBuffer
!= FileObject
->FileName
.Buffer
)
254 if (FileObject
->FileName
.Buffer
)
256 ExFreePoolWithTag(FileObject
->FileName
.Buffer
, TAG_IO_NAME
);
259 FileObject
->FileName
.Buffer
= NewBuffer
;
260 FileObject
->FileName
.MaximumLength
= RequiredLength
;
261 FileObject
->FileName
.Buffer
[RequiredLength
/ sizeof(WCHAR
) - 1] = UNICODE_NULL
;
265 /* We don't need them anymore - it was allocated by the driver */
266 ExFreePool(DataBuffer
);
271 IopParseDevice(IN PVOID ParseObject
,
273 IN OUT PACCESS_STATE AccessState
,
274 IN KPROCESSOR_MODE AccessMode
,
276 IN OUT PUNICODE_STRING CompleteName
,
277 IN OUT PUNICODE_STRING RemainingName
,
278 IN OUT PVOID Context
,
279 IN PSECURITY_QUALITY_OF_SERVICE SecurityQos OPTIONAL
,
282 POPEN_PACKET OpenPacket
= (POPEN_PACKET
)Context
;
283 PDEVICE_OBJECT OriginalDeviceObject
= (PDEVICE_OBJECT
)ParseObject
;
284 PDEVICE_OBJECT DeviceObject
, OwnerDevice
;
286 PFILE_OBJECT FileObject
;
289 PIO_STACK_LOCATION StackLoc
;
290 IO_SECURITY_CONTEXT SecurityContext
;
291 IO_STATUS_BLOCK IoStatusBlock
;
292 BOOLEAN DirectOpen
= FALSE
, OpenCancelled
, UseDummyFile
;
293 OBJECT_ATTRIBUTES ObjectAttributes
;
295 PDUMMY_FILE_OBJECT LocalFileObject
;
296 PFILE_BASIC_INFORMATION FileBasicInfo
;
298 KPROCESSOR_MODE CheckMode
;
299 BOOLEAN VolumeOpen
= FALSE
;
300 ACCESS_MASK DesiredAccess
, GrantedAccess
;
301 BOOLEAN AccessGranted
, LockHeld
= FALSE
;
302 PPRIVILEGE_SET Privileges
= NULL
;
303 UNICODE_STRING FileString
;
305 IOTRACE(IO_FILE_DEBUG
, "ParseObject: %p. RemainingName: %wZ\n",
306 ParseObject
, RemainingName
);
308 for (Attempt
= 0; Attempt
< IOP_MAX_REPARSE_TRAVERSAL
; ++Attempt
)
313 /* Validate the open packet */
314 if (!IopValidateOpenPacket(OpenPacket
)) return STATUS_OBJECT_TYPE_MISMATCH
;
316 /* Valide reparse point in case we traversed a mountpoint */
317 if (OpenPacket
->TraversedMountPoint
)
319 /* This is a reparse point we understand */
320 ASSERT(OpenPacket
->Information
== IO_REPARSE_TAG_MOUNT_POINT
);
322 /* Make sure we're dealing with correct DO */
323 if (OriginalDeviceObject
->DeviceType
!= FILE_DEVICE_DISK
&&
324 OriginalDeviceObject
->DeviceType
!= FILE_DEVICE_CD_ROM
&&
325 OriginalDeviceObject
->DeviceType
!= FILE_DEVICE_VIRTUAL_DISK
&&
326 OriginalDeviceObject
->DeviceType
!= FILE_DEVICE_TAPE
)
328 OpenPacket
->FinalStatus
= STATUS_IO_REPARSE_DATA_INVALID
;
329 return STATUS_IO_REPARSE_DATA_INVALID
;
333 /* Check if we have a related file object */
334 if (OpenPacket
->RelatedFileObject
)
336 /* Use the related file object's device object */
337 OriginalDeviceObject
= OpenPacket
->RelatedFileObject
->DeviceObject
;
340 /* Validate device status */
341 Status
= IopCheckDeviceAndDriver(OpenPacket
, OriginalDeviceObject
);
342 if (!NT_SUCCESS(Status
))
344 /* We failed, return status */
345 OpenPacket
->FinalStatus
= Status
;
349 /* Map the generic mask and set the new mapping in the access state */
350 RtlMapGenericMask(&AccessState
->RemainingDesiredAccess
,
351 &IoFileObjectType
->TypeInfo
.GenericMapping
);
352 RtlMapGenericMask(&AccessState
->OriginalDesiredAccess
,
353 &IoFileObjectType
->TypeInfo
.GenericMapping
);
354 SeSetAccessStateGenericMapping(AccessState
,
355 &IoFileObjectType
->TypeInfo
.GenericMapping
);
356 DesiredAccess
= AccessState
->RemainingDesiredAccess
;
358 /* Check what kind of access checks to do */
359 if ((AccessMode
!= KernelMode
) ||
360 (OpenPacket
->Options
& IO_FORCE_ACCESS_CHECK
))
362 /* Call is from user-mode or kernel is forcing checks */
363 CheckMode
= UserMode
;
367 /* Call is from the kernel */
368 CheckMode
= KernelMode
;
371 /* Check privilege for backup or restore operation */
372 IopCheckBackupRestorePrivilege(AccessState
,
373 &OpenPacket
->CreateOptions
,
375 OpenPacket
->Disposition
);
377 /* Check if we are re-parsing */
378 if (((OpenPacket
->Override
) && !(RemainingName
->Length
)) ||
379 (AccessState
->Flags
& SE_BACKUP_PRIVILEGES_CHECKED
))
381 /* Get granted access from the last call */
382 DesiredAccess
|= AccessState
->PreviouslyGrantedAccess
;
385 /* Check if this is a volume open */
386 if ((OpenPacket
->RelatedFileObject
) &&
387 (OpenPacket
->RelatedFileObject
->Flags
& FO_VOLUME_OPEN
) &&
388 !(RemainingName
->Length
))
394 /* Now check if we need access checks */
395 if (((AccessMode
!= KernelMode
) ||
396 (OpenPacket
->Options
& IO_FORCE_ACCESS_CHECK
)) &&
397 (!(OpenPacket
->RelatedFileObject
) || (VolumeOpen
)) &&
398 !(OpenPacket
->Override
))
400 KeEnterCriticalRegion();
401 ExAcquireResourceSharedLite(&IopSecurityResource
, TRUE
);
403 /* Check if a device object is being parsed */
404 if (!RemainingName
->Length
)
406 /* Lock the subject context */
407 SeLockSubjectContext(&AccessState
->SubjectSecurityContext
);
410 /* Do access check */
411 AccessGranted
= SeAccessCheck(OriginalDeviceObject
->
413 &AccessState
->SubjectSecurityContext
,
419 TypeInfo
.GenericMapping
,
425 /* Append and free the privileges */
426 SeAppendPrivileges(AccessState
, Privileges
);
427 SeFreePrivileges(Privileges
);
430 /* Check if we got access */
433 /* Update access state */
434 AccessState
->PreviouslyGrantedAccess
|= GrantedAccess
;
435 AccessState
->RemainingDesiredAccess
&= ~(GrantedAccess
|
437 OpenPacket
->Override
= TRUE
;
440 FileString
.Length
= 8;
441 FileString
.MaximumLength
= 8;
442 FileString
.Buffer
= L
"File";
444 /* Do Audit/Alarm for open operation */
445 SeOpenObjectAuditAlarm(&FileString
,
446 OriginalDeviceObject
,
448 OriginalDeviceObject
->SecurityDescriptor
,
453 &AccessState
->GenerateOnClose
);
457 /* Check if we need to do traverse validation */
458 if (!(AccessState
->Flags
& TOKEN_HAS_TRAVERSE_PRIVILEGE
) ||
459 ((OriginalDeviceObject
->DeviceType
== FILE_DEVICE_DISK
) ||
460 (OriginalDeviceObject
->DeviceType
== FILE_DEVICE_CD_ROM
)))
462 /* Check if this is a restricted token */
463 if (!(AccessState
->Flags
& TOKEN_IS_RESTRICTED
))
465 /* Do the FAST traverse check */
466 AccessGranted
= SeFastTraverseCheck(OriginalDeviceObject
->SecurityDescriptor
,
474 AccessGranted
= FALSE
;
477 /* Check if we failed to get access */
480 /* Lock the subject context */
481 SeLockSubjectContext(&AccessState
->SubjectSecurityContext
);
484 /* Do access check */
485 AccessGranted
= SeAccessCheck(OriginalDeviceObject
->
487 &AccessState
->SubjectSecurityContext
,
493 TypeInfo
.GenericMapping
,
499 /* Append and free the privileges */
500 SeAppendPrivileges(AccessState
, Privileges
);
501 SeFreePrivileges(Privileges
);
505 /* FIXME: Do Audit/Alarm for traverse check */
509 /* Access automatically granted */
510 AccessGranted
= TRUE
;
514 ExReleaseResourceLite(&IopSecurityResource
);
515 KeLeaveCriticalRegion();
517 /* Check if we hold the lock */
521 SeUnlockSubjectContext(&AccessState
->SubjectSecurityContext
);
524 /* Check if access failed */
527 /* Dereference the device and fail */
528 DPRINT1("Traverse access failed!\n");
529 IopDereferenceDeviceObject(OriginalDeviceObject
, FALSE
);
530 return STATUS_ACCESS_DENIED
;
534 /* Check if we can simply use a dummy file */
535 UseDummyFile
= ((OpenPacket
->QueryOnly
) || (OpenPacket
->DeleteOnly
));
538 /* FIXME: Small hack still exists, have to check why...
539 * This is triggered multiple times by usetup and then once per boot.
541 if (ExpInTextModeSetup
&&
543 !(RemainingName
->Length
) &&
544 !(OpenPacket
->RelatedFileObject
) &&
545 ((wcsstr(CompleteName
->Buffer
, L
"Harddisk")) ||
546 (wcsstr(CompleteName
->Buffer
, L
"Floppy"))) &&
549 DPRINT1("Using IopParseDevice() hack. Requested invalid attributes: %lx\n",
550 DesiredAccess
& ~(SYNCHRONIZE
|
551 FILE_READ_ATTRIBUTES
|
553 ACCESS_SYSTEM_SECURITY
|
560 /* Check if this is a direct open */
561 if (!(RemainingName
->Length
) &&
562 !(OpenPacket
->RelatedFileObject
) &&
563 ((DesiredAccess
& ~(SYNCHRONIZE
|
564 FILE_READ_ATTRIBUTES
|
566 ACCESS_SYSTEM_SECURITY
|
571 /* Remember this for later */
575 /* Check if we have a related FO that wasn't a direct open */
576 if ((OpenPacket
->RelatedFileObject
) &&
577 !(OpenPacket
->RelatedFileObject
->Flags
& FO_DIRECT_DEVICE_OPEN
))
579 /* The device object is the one we were given */
580 DeviceObject
= ParseObject
;
582 /* Check if the related FO had a VPB */
583 if (OpenPacket
->RelatedFileObject
->Vpb
)
585 /* Yes, remember it */
586 Vpb
= OpenPacket
->RelatedFileObject
->Vpb
;
589 InterlockedIncrement((PLONG
)&Vpb
->ReferenceCount
);
591 /* Check if we were given a specific top level device to use */
592 if (OpenPacket
->InternalFlags
& IOP_USE_TOP_LEVEL_DEVICE_HINT
)
594 DeviceObject
= Vpb
->DeviceObject
;
600 /* Check if it has a VPB */
601 if ((OriginalDeviceObject
->Vpb
) && !(DirectOpen
))
603 /* Check if the VPB is mounted, and mount it */
604 Vpb
= IopCheckVpbMounted(OpenPacket
,
605 OriginalDeviceObject
,
608 if (!Vpb
) return Status
;
610 /* Get the VPB's device object */
611 DeviceObject
= Vpb
->DeviceObject
;
615 /* The device object is the one we were given */
616 DeviceObject
= OriginalDeviceObject
;
619 /* If we weren't given a specific top level device, look for an attached device */
620 if (!(OpenPacket
->InternalFlags
& IOP_USE_TOP_LEVEL_DEVICE_HINT
) &&
621 DeviceObject
->AttachedDevice
)
623 /* Get the attached device */
624 DeviceObject
= IoGetAttachedDevice(DeviceObject
);
628 if (OpenPacket
->InternalFlags
& IOP_USE_TOP_LEVEL_DEVICE_HINT
)
630 // FIXME: Verify our device object is good to use
631 ASSERT(DirectOpen
== FALSE
);
634 /* If we traversed a mount point, reset the information */
635 if (OpenPacket
->TraversedMountPoint
)
637 OpenPacket
->TraversedMountPoint
= FALSE
;
640 /* Check if this is a secure FSD */
641 if ((DeviceObject
->Characteristics
& FILE_DEVICE_SECURE_OPEN
) &&
642 ((OpenPacket
->RelatedFileObject
) || (RemainingName
->Length
)) &&
648 KeEnterCriticalRegion();
649 ExAcquireResourceSharedLite(&IopSecurityResource
, TRUE
);
651 /* Lock the subject context */
652 SeLockSubjectContext(&AccessState
->SubjectSecurityContext
);
654 /* Do access check */
655 AccessGranted
= SeAccessCheck(OriginalDeviceObject
->SecurityDescriptor
,
656 &AccessState
->SubjectSecurityContext
,
661 &IoFileObjectType
->TypeInfo
.GenericMapping
,
665 if (Privileges
!= NULL
)
667 /* Append and free the privileges */
668 SeAppendPrivileges(AccessState
, Privileges
);
669 SeFreePrivileges(Privileges
);
672 /* Check if we got access */
675 AccessState
->PreviouslyGrantedAccess
|= GrantedAccess
;
676 AccessState
->RemainingDesiredAccess
&= ~(GrantedAccess
| MAXIMUM_ALLOWED
);
679 FileString
.Length
= 8;
680 FileString
.MaximumLength
= 8;
681 FileString
.Buffer
= L
"File";
683 /* Do Audit/Alarm for open operation
684 * NOTA: we audit target device object
686 SeOpenObjectAuditAlarm(&FileString
,
689 OriginalDeviceObject
->SecurityDescriptor
,
694 &AccessState
->GenerateOnClose
);
696 SeUnlockSubjectContext(&AccessState
->SubjectSecurityContext
);
698 ExReleaseResourceLite(&IopSecurityResource
);
699 KeLeaveCriticalRegion();
701 /* Check if access failed */
704 /* Dereference the device and fail */
705 IopDereferenceDeviceObject(OriginalDeviceObject
, FALSE
);
706 if (Vpb
) IopDereferenceVpbAndFree(Vpb
);
707 return STATUS_ACCESS_DENIED
;
711 /* Allocate the IRP */
712 Irp
= IoAllocateIrp(DeviceObject
->StackSize
, TRUE
);
715 /* Dereference the device and VPB, then fail */
716 IopDereferenceDeviceObject(OriginalDeviceObject
, FALSE
);
717 if (Vpb
) IopDereferenceVpbAndFree(Vpb
);
718 return STATUS_INSUFFICIENT_RESOURCES
;
721 /* Now set the IRP data */
722 Irp
->RequestorMode
= AccessMode
;
723 Irp
->Flags
= IRP_CREATE_OPERATION
| IRP_SYNCHRONOUS_API
| IRP_DEFER_IO_COMPLETION
;
724 Irp
->Tail
.Overlay
.Thread
= PsGetCurrentThread();
725 Irp
->UserIosb
= &IoStatusBlock
;
726 Irp
->MdlAddress
= NULL
;
727 Irp
->PendingReturned
= FALSE
;
728 Irp
->UserEvent
= NULL
;
730 Irp
->CancelRoutine
= NULL
;
731 Irp
->Tail
.Overlay
.AuxiliaryBuffer
= NULL
;
733 /* Setup the security context */
734 SecurityContext
.SecurityQos
= SecurityQos
;
735 SecurityContext
.AccessState
= AccessState
;
736 SecurityContext
.DesiredAccess
= AccessState
->RemainingDesiredAccess
;
737 SecurityContext
.FullCreateOptions
= OpenPacket
->CreateOptions
;
739 /* Get the I/O Stack location */
740 StackLoc
= IoGetNextIrpStackLocation(Irp
);
741 StackLoc
->Control
= 0;
743 /* Check what kind of file this is */
744 switch (OpenPacket
->CreateFileType
)
747 case CreateFileTypeNone
:
749 /* Set the major function and EA Length */
750 StackLoc
->MajorFunction
= IRP_MJ_CREATE
;
751 StackLoc
->Parameters
.Create
.EaLength
= OpenPacket
->EaLength
;
754 StackLoc
->Flags
= (UCHAR
)OpenPacket
->Options
;
755 StackLoc
->Flags
|= !(Attributes
& OBJ_CASE_INSENSITIVE
) ? SL_CASE_SENSITIVE
: 0;
759 case CreateFileTypeNamedPipe
:
761 /* Set the named pipe MJ and set the parameters */
762 StackLoc
->MajorFunction
= IRP_MJ_CREATE_NAMED_PIPE
;
763 StackLoc
->Parameters
.CreatePipe
.Parameters
= OpenPacket
->ExtraCreateParameters
;
767 case CreateFileTypeMailslot
:
769 /* Set the mailslot MJ and set the parameters */
770 StackLoc
->MajorFunction
= IRP_MJ_CREATE_MAILSLOT
;
771 StackLoc
->Parameters
.CreateMailslot
.Parameters
= OpenPacket
->ExtraCreateParameters
;
775 /* Set the common data */
776 Irp
->Overlay
.AllocationSize
= OpenPacket
->AllocationSize
;
777 Irp
->AssociatedIrp
.SystemBuffer
= OpenPacket
->EaBuffer
;
778 StackLoc
->Parameters
.Create
.Options
= (OpenPacket
->Disposition
<< 24) |
779 (OpenPacket
->CreateOptions
&
781 StackLoc
->Parameters
.Create
.FileAttributes
= OpenPacket
->FileAttributes
;
782 StackLoc
->Parameters
.Create
.ShareAccess
= OpenPacket
->ShareAccess
;
783 StackLoc
->Parameters
.Create
.SecurityContext
= &SecurityContext
;
785 /* Check if we really need to create an object */
788 ULONG ObjectSize
= sizeof(FILE_OBJECT
);
790 /* Tag on space for a file object extension */
791 if (OpenPacket
->InternalFlags
& IOP_CREATE_FILE_OBJECT_EXTENSION
)
792 ObjectSize
+= sizeof(FILE_OBJECT_EXTENSION
);
794 /* Create the actual file object */
795 InitializeObjectAttributes(&ObjectAttributes
,
800 Status
= ObCreateObject(KernelMode
,
808 (PVOID
*)&FileObject
);
809 if (!NT_SUCCESS(Status
))
811 /* Create failed, free the IRP */
814 /* Dereference the device and VPB */
815 IopDereferenceDeviceObject(OriginalDeviceObject
, FALSE
);
816 if (Vpb
) IopDereferenceVpbAndFree(Vpb
);
818 /* We failed, return status */
819 OpenPacket
->FinalStatus
= Status
;
823 /* Clear the file object */
824 RtlZeroMemory(FileObject
, sizeof(FILE_OBJECT
));
826 /* Check if this is Synch I/O */
827 if (OpenPacket
->CreateOptions
&
828 (FILE_SYNCHRONOUS_IO_ALERT
| FILE_SYNCHRONOUS_IO_NONALERT
))
830 /* Set the synch flag */
831 FileObject
->Flags
|= FO_SYNCHRONOUS_IO
;
833 /* Check if it's also alertable */
834 if (OpenPacket
->CreateOptions
& FILE_SYNCHRONOUS_IO_ALERT
)
836 /* It is, set the alertable flag */
837 FileObject
->Flags
|= FO_ALERTABLE_IO
;
841 /* Check if this is synch I/O */
842 if (FileObject
->Flags
& FO_SYNCHRONOUS_IO
)
844 /* Initialize the event */
845 KeInitializeEvent(&FileObject
->Lock
, SynchronizationEvent
, FALSE
);
848 /* Check if the caller requested no intermediate buffering */
849 if (OpenPacket
->CreateOptions
& FILE_NO_INTERMEDIATE_BUFFERING
)
851 /* Set the correct flag for the FSD to read */
852 FileObject
->Flags
|= FO_NO_INTERMEDIATE_BUFFERING
;
855 /* Check if the caller requested write through support */
856 if (OpenPacket
->CreateOptions
& FILE_WRITE_THROUGH
)
858 /* Set the correct flag for the FSD to read */
859 FileObject
->Flags
|= FO_WRITE_THROUGH
;
862 /* Check if the caller says the file will be only read sequentially */
863 if (OpenPacket
->CreateOptions
& FILE_SEQUENTIAL_ONLY
)
865 /* Set the correct flag for the FSD to read */
866 FileObject
->Flags
|= FO_SEQUENTIAL_ONLY
;
869 /* Check if the caller believes the file will be only read randomly */
870 if (OpenPacket
->CreateOptions
& FILE_RANDOM_ACCESS
)
872 /* Set the correct flag for the FSD to read */
873 FileObject
->Flags
|= FO_RANDOM_ACCESS
;
876 /* Check if we were asked to setup a file object extension */
877 if (OpenPacket
->InternalFlags
& IOP_CREATE_FILE_OBJECT_EXTENSION
)
879 PFILE_OBJECT_EXTENSION FileObjectExtension
;
881 /* Make sure the file object knows it has an extension */
882 FileObject
->Flags
|= FO_FILE_OBJECT_HAS_EXTENSION
;
884 FileObjectExtension
= (PFILE_OBJECT_EXTENSION
)(FileObject
+ 1);
885 FileObject
->FileObjectExtension
= FileObjectExtension
;
887 /* Add the top level device which we'll send the request to */
888 if (OpenPacket
->InternalFlags
& IOP_USE_TOP_LEVEL_DEVICE_HINT
)
890 FileObjectExtension
->TopDeviceObjectHint
= DeviceObject
;
896 /* Use the dummy object instead */
897 LocalFileObject
= OpenPacket
->LocalFileObject
;
898 RtlZeroMemory(LocalFileObject
, sizeof(DUMMY_FILE_OBJECT
));
901 FileObject
= (PFILE_OBJECT
)&LocalFileObject
->ObjectHeader
.Body
;
902 LocalFileObject
->ObjectHeader
.Type
= IoFileObjectType
;
903 LocalFileObject
->ObjectHeader
.PointerCount
= 1;
906 /* Setup the file header */
907 FileObject
->Type
= IO_TYPE_FILE
;
908 FileObject
->Size
= sizeof(FILE_OBJECT
);
909 FileObject
->RelatedFileObject
= OpenPacket
->RelatedFileObject
;
910 FileObject
->DeviceObject
= OriginalDeviceObject
;
912 /* Check if this is a direct device open */
913 if (DirectOpen
) FileObject
->Flags
|= FO_DIRECT_DEVICE_OPEN
;
915 /* Check if the caller wants case sensitivity */
916 if (!(Attributes
& OBJ_CASE_INSENSITIVE
))
918 /* Tell the driver about it */
919 FileObject
->Flags
|= FO_OPENED_CASE_SENSITIVE
;
922 /* Now set the file object */
923 Irp
->Tail
.Overlay
.OriginalFileObject
= FileObject
;
924 StackLoc
->FileObject
= FileObject
;
926 /* Check if the file object has a name */
927 if (RemainingName
->Length
)
929 /* Setup the unicode string */
930 FileObject
->FileName
.MaximumLength
= RemainingName
->Length
+
932 FileObject
->FileName
.Buffer
= ExAllocatePoolWithTag(PagedPool
,
937 if (!FileObject
->FileName
.Buffer
)
939 /* Failed to allocate the name, free the IRP */
942 /* Dereference the device object and VPB */
943 IopDereferenceDeviceObject(OriginalDeviceObject
, FALSE
);
944 if (Vpb
) IopDereferenceVpbAndFree(Vpb
);
946 /* Clear the FO and dereference it */
947 FileObject
->DeviceObject
= NULL
;
948 if (!UseDummyFile
) ObDereferenceObject(FileObject
);
951 return STATUS_INSUFFICIENT_RESOURCES
;
956 RtlCopyUnicodeString(&FileObject
->FileName
, RemainingName
);
958 /* Initialize the File Object event and set the FO */
959 KeInitializeEvent(&FileObject
->Event
, NotificationEvent
, FALSE
);
960 OpenPacket
->FileObject
= FileObject
;
962 /* Queue the IRP and call the driver */
963 IopQueueIrpToThread(Irp
);
964 Status
= IoCallDriver(DeviceObject
, Irp
);
965 if (Status
== STATUS_PENDING
)
967 /* Wait for the driver to complete the create */
968 KeWaitForSingleObject(&FileObject
->Event
,
974 /* Get the new status */
975 Status
= IoStatusBlock
.Status
;
979 /* We'll have to complete it ourselves */
980 ASSERT(!Irp
->PendingReturned
);
981 ASSERT(!Irp
->MdlAddress
);
983 /* Handle name change if required */
984 if (Status
== STATUS_REPARSE
)
986 /* Check this is a mount point */
987 if (Irp
->IoStatus
.Information
== IO_REPARSE_TAG_MOUNT_POINT
)
989 PREPARSE_DATA_BUFFER ReparseData
;
991 /* Reparse point attributes were passed by the driver in the auxiliary buffer */
992 ASSERT(Irp
->Tail
.Overlay
.AuxiliaryBuffer
!= NULL
);
993 ReparseData
= (PREPARSE_DATA_BUFFER
)Irp
->Tail
.Overlay
.AuxiliaryBuffer
;
995 ASSERT(ReparseData
->ReparseTag
== IO_REPARSE_TAG_MOUNT_POINT
);
996 ASSERT(ReparseData
->ReparseDataLength
< MAXIMUM_REPARSE_DATA_BUFFER_SIZE
);
997 ASSERT(ReparseData
->Reserved
< MAXIMUM_REPARSE_DATA_BUFFER_SIZE
);
999 IopDoNameTransmogrify(Irp
, FileObject
, ReparseData
);
1003 /* Completion happens at APC_LEVEL */
1004 KeRaiseIrql(APC_LEVEL
, &OldIrql
);
1006 /* Get the new I/O Status block ourselves */
1007 IoStatusBlock
= Irp
->IoStatus
;
1008 Status
= IoStatusBlock
.Status
;
1010 /* Manually signal the even, we can't have any waiters */
1011 FileObject
->Event
.Header
.SignalState
= 1;
1013 /* Now that we've signaled the events, de-associate the IRP */
1014 IopUnQueueIrpFromThread(Irp
);
1016 /* Check if the IRP had an input buffer */
1017 if ((Irp
->Flags
& IRP_BUFFERED_IO
) &&
1018 (Irp
->Flags
& IRP_DEALLOCATE_BUFFER
))
1020 /* Free it. A driver might've tacked one on */
1021 ExFreePool(Irp
->AssociatedIrp
.SystemBuffer
);
1024 /* Free the IRP and bring the IRQL back down */
1026 KeLowerIrql(OldIrql
);
1029 /* Copy the I/O Status */
1030 OpenPacket
->Information
= IoStatusBlock
.Information
;
1032 /* The driver failed to create the file */
1033 if (!NT_SUCCESS(Status
))
1035 /* Check if we have a name */
1036 if (FileObject
->FileName
.Length
)
1039 ExFreePoolWithTag(FileObject
->FileName
.Buffer
, TAG_IO_NAME
);
1040 FileObject
->FileName
.Length
= 0;
1043 /* Clear its device object */
1044 FileObject
->DeviceObject
= NULL
;
1046 /* Save this now because the FO might go away */
1047 OpenCancelled
= FileObject
->Flags
& FO_FILE_OPEN_CANCELLED
?
1050 /* Clear the file object in the open packet */
1051 OpenPacket
->FileObject
= NULL
;
1053 /* Dereference the file object */
1054 if (!UseDummyFile
) ObDereferenceObject(FileObject
);
1056 /* Dereference the device object */
1057 IopDereferenceDeviceObject(OriginalDeviceObject
, FALSE
);
1059 /* Unless the driver cancelled the open, dereference the VPB */
1060 if (!(OpenCancelled
) && (Vpb
)) IopDereferenceVpbAndFree(Vpb
);
1062 /* Set the status and return */
1063 OpenPacket
->FinalStatus
= Status
;
1066 else if (Status
== STATUS_REPARSE
)
1068 if (OpenPacket
->Information
== IO_REPARSE
||
1069 OpenPacket
->Information
== IO_REPARSE_TAG_MOUNT_POINT
)
1071 /* Update CompleteName with reparse info which got updated in IopDoNameTransmogrify() */
1072 if (CompleteName
->MaximumLength
< FileObject
->FileName
.Length
)
1074 PWSTR NewCompleteName
;
1076 /* Allocate a new buffer for the string */
1077 NewCompleteName
= ExAllocatePoolWithTag(PagedPool
, FileObject
->FileName
.Length
, TAG_IO_NAME
);
1078 if (NewCompleteName
== NULL
)
1080 OpenPacket
->FinalStatus
= STATUS_INSUFFICIENT_RESOURCES
;
1081 return STATUS_INSUFFICIENT_RESOURCES
;
1084 /* Release the old one */
1085 if (CompleteName
->Buffer
!= NULL
)
1087 ExFreePoolWithTag(CompleteName
->Buffer
, 0);
1090 /* And setup the new one */
1091 CompleteName
->Buffer
= NewCompleteName
;
1092 CompleteName
->MaximumLength
= FileObject
->FileName
.Length
;
1095 /* Copy our new complete name */
1096 RtlCopyUnicodeString(CompleteName
, &FileObject
->FileName
);
1098 if (OpenPacket
->Information
== IO_REPARSE_TAG_MOUNT_POINT
)
1100 OpenPacket
->RelatedFileObject
= NULL
;
1104 /* Check if we have a name */
1105 if (FileObject
->FileName
.Length
)
1108 ExFreePoolWithTag(FileObject
->FileName
.Buffer
, 0);
1109 FileObject
->FileName
.Length
= 0;
1112 /* Clear its device object */
1113 FileObject
->DeviceObject
= NULL
;
1115 /* Clear the file object in the open packet */
1116 OpenPacket
->FileObject
= NULL
;
1118 /* Dereference the file object */
1119 if (!UseDummyFile
) ObDereferenceObject(FileObject
);
1121 /* Dereference the device object */
1122 IopDereferenceDeviceObject(OriginalDeviceObject
, FALSE
);
1124 /* Unless the driver cancelled the open, dereference the VPB */
1125 if (Vpb
!= NULL
) IopDereferenceVpbAndFree(Vpb
);
1127 if (OpenPacket
->Information
!= IO_REMOUNT
)
1129 OpenPacket
->RelatedFileObject
= NULL
;
1131 /* Inform we traversed a mount point for later attempt */
1132 if (OpenPacket
->Information
== IO_REPARSE_TAG_MOUNT_POINT
)
1134 OpenPacket
->TraversedMountPoint
= 1;
1137 /* In case we override checks, but got this on volume open, fail hard */
1138 if (OpenPacket
->Override
)
1140 KeBugCheckEx(DRIVER_RETURNED_STATUS_REPARSE_FOR_VOLUME_OPEN
,
1141 (ULONG_PTR
)OriginalDeviceObject
,
1142 (ULONG_PTR
)DeviceObject
,
1143 (ULONG_PTR
)CompleteName
,
1144 OpenPacket
->Information
);
1147 /* Return to IO/OB so that information can be upgraded */
1148 return STATUS_REPARSE
;
1151 /* Loop again and reattempt an opening */
1158 if (Attempt
== IOP_MAX_REPARSE_TRAVERSAL
)
1159 return STATUS_UNSUCCESSFUL
;
1161 /* Get the owner of the File Object */
1162 OwnerDevice
= IoGetRelatedDeviceObject(FileObject
);
1165 * It's possible that the device to whom we sent the IRP to
1166 * isn't actually the device that ended opening the file object
1169 if (OwnerDevice
!= DeviceObject
)
1171 /* We have to de-reference the VPB we had associated */
1172 if (Vpb
) IopDereferenceVpbAndFree(Vpb
);
1174 /* And re-associate with the actual one */
1175 Vpb
= FileObject
->Vpb
;
1176 if (Vpb
) InterlockedIncrement((PLONG
)&Vpb
->ReferenceCount
);
1179 /* Make sure we are not using a dummy */
1182 /* Check if this was a volume open */
1183 if ((!(FileObject
->RelatedFileObject
) ||
1184 (FileObject
->RelatedFileObject
->Flags
& FO_VOLUME_OPEN
)) &&
1185 !(FileObject
->FileName
.Length
))
1187 /* All signs point to it, but make sure it was actually an FSD */
1188 if ((OwnerDevice
->DeviceType
== FILE_DEVICE_DISK_FILE_SYSTEM
) ||
1189 (OwnerDevice
->DeviceType
== FILE_DEVICE_CD_ROM_FILE_SYSTEM
) ||
1190 (OwnerDevice
->DeviceType
== FILE_DEVICE_TAPE_FILE_SYSTEM
) ||
1191 (OwnerDevice
->DeviceType
== FILE_DEVICE_FILE_SYSTEM
))
1193 /* The owner device is an FSD, so this is a volume open for real */
1194 FileObject
->Flags
|= FO_VOLUME_OPEN
;
1198 /* Reference the object and set the parse check */
1199 ObReferenceObject(FileObject
);
1200 *Object
= FileObject
;
1201 OpenPacket
->FinalStatus
= IoStatusBlock
.Status
;
1202 OpenPacket
->ParseCheck
= TRUE
;
1203 return OpenPacket
->FinalStatus
;
1207 /* Check if this was a query */
1208 if (OpenPacket
->QueryOnly
)
1210 /* Check if the caller wants basic info only */
1211 if (!OpenPacket
->FullAttributes
)
1213 /* Allocate the buffer */
1214 FileBasicInfo
= ExAllocatePoolWithTag(NonPagedPool
,
1215 sizeof(*FileBasicInfo
),
1220 Status
= IoQueryFileInformation(FileObject
,
1221 FileBasicInformation
,
1222 sizeof(*FileBasicInfo
),
1225 if (NT_SUCCESS(Status
))
1228 RtlCopyMemory(OpenPacket
->BasicInformation
,
1233 /* Free our buffer */
1234 ExFreePoolWithTag(FileBasicInfo
, TAG_IO
);
1239 Status
= STATUS_INSUFFICIENT_RESOURCES
;
1244 /* This is a full query */
1245 Status
= IoQueryFileInformation(
1247 FileNetworkOpenInformation
,
1248 sizeof(FILE_NETWORK_OPEN_INFORMATION
),
1249 OpenPacket
->NetworkInformation
,
1251 if (!NT_SUCCESS(Status
)) ASSERT(Status
!= STATUS_NOT_IMPLEMENTED
);
1255 /* Delete the file object */
1256 IopDeleteFile(FileObject
);
1258 /* Clear out the file */
1259 OpenPacket
->FileObject
= NULL
;
1261 /* Set and return status */
1262 OpenPacket
->FinalStatus
= Status
;
1263 OpenPacket
->ParseCheck
= TRUE
;
1270 IopParseFile(IN PVOID ParseObject
,
1271 IN PVOID ObjectType
,
1272 IN OUT PACCESS_STATE AccessState
,
1273 IN KPROCESSOR_MODE AccessMode
,
1274 IN ULONG Attributes
,
1275 IN OUT PUNICODE_STRING CompleteName
,
1276 IN OUT PUNICODE_STRING RemainingName
,
1277 IN OUT PVOID Context OPTIONAL
,
1278 IN PSECURITY_QUALITY_OF_SERVICE SecurityQos OPTIONAL
,
1282 POPEN_PACKET OpenPacket
= (POPEN_PACKET
)Context
;
1284 /* Validate the open packet */
1285 if (!IopValidateOpenPacket(OpenPacket
)) return STATUS_OBJECT_TYPE_MISMATCH
;
1287 /* Get the device object */
1288 DeviceObject
= IoGetRelatedDeviceObject(ParseObject
);
1289 OpenPacket
->RelatedFileObject
= ParseObject
;
1291 /* Call the main routine */
1292 return IopParseDevice(DeviceObject
,
1306 IopDeleteFile(IN PVOID ObjectBody
)
1308 PFILE_OBJECT FileObject
= (PFILE_OBJECT
)ObjectBody
;
1310 PIO_STACK_LOCATION StackPtr
;
1313 PDEVICE_OBJECT DeviceObject
;
1314 BOOLEAN DereferenceDone
= FALSE
;
1317 IOTRACE(IO_FILE_DEBUG
, "ObjectBody: %p\n", ObjectBody
);
1319 /* Check if the file has a device object */
1320 if (FileObject
->DeviceObject
)
1322 /* Check if this is a direct open or not */
1323 if (FileObject
->Flags
& FO_DIRECT_DEVICE_OPEN
)
1325 /* Get the attached device */
1326 DeviceObject
= IoGetAttachedDevice(FileObject
->DeviceObject
);
1330 /* Use the file object's device object */
1331 DeviceObject
= IoGetRelatedDeviceObject(FileObject
);
1335 ASSERT(!(FileObject
->Flags
& FO_SYNCHRONOUS_IO
) ||
1336 (InterlockedExchange((PLONG
)&FileObject
->Busy
, TRUE
) == FALSE
));
1338 /* Check if the handle wasn't created yet */
1339 if (!(FileObject
->Flags
& FO_HANDLE_CREATED
))
1341 /* Send the cleanup IRP */
1342 IopCloseFile(NULL
, ObjectBody
, 0, 1, 1);
1345 /* Clear and set up Events */
1346 KeClearEvent(&FileObject
->Event
);
1347 KeInitializeEvent(&Event
, SynchronizationEvent
, FALSE
);
1349 /* Allocate an IRP */
1350 Irp
= IopAllocateIrpMustSucceed(DeviceObject
->StackSize
);
1353 Irp
->UserEvent
= &Event
;
1354 Irp
->UserIosb
= &Irp
->IoStatus
;
1355 Irp
->Tail
.Overlay
.Thread
= PsGetCurrentThread();
1356 Irp
->Tail
.Overlay
.OriginalFileObject
= FileObject
;
1357 Irp
->Flags
= IRP_CLOSE_OPERATION
| IRP_SYNCHRONOUS_API
;
1359 /* Set up Stack Pointer Data */
1360 StackPtr
= IoGetNextIrpStackLocation(Irp
);
1361 StackPtr
->MajorFunction
= IRP_MJ_CLOSE
;
1362 StackPtr
->FileObject
= FileObject
;
1365 IopQueueIrpToThread(Irp
);
1367 /* Get the VPB and check if this isn't a direct open */
1368 Vpb
= FileObject
->Vpb
;
1369 if ((Vpb
) && !(FileObject
->Flags
& FO_DIRECT_DEVICE_OPEN
))
1371 /* Dereference the VPB before the close */
1372 InterlockedDecrement((PLONG
)&Vpb
->ReferenceCount
);
1375 /* Check if the FS will never disappear by itself */
1376 if (FileObject
->DeviceObject
->Flags
& DO_NEVER_LAST_DEVICE
)
1378 /* Dereference it */
1379 InterlockedDecrement(&FileObject
->DeviceObject
->ReferenceCount
);
1380 DereferenceDone
= TRUE
;
1383 /* Call the FS Driver */
1384 Status
= IoCallDriver(DeviceObject
, Irp
);
1385 if (Status
== STATUS_PENDING
)
1387 /* Wait for completion */
1388 KeWaitForSingleObject(&Event
, Executive
, KernelMode
, FALSE
, NULL
);
1391 /* De-queue the IRP */
1392 KeRaiseIrql(APC_LEVEL
, &OldIrql
);
1393 IopUnQueueIrpFromThread(Irp
);
1394 KeLowerIrql(OldIrql
);
1399 /* Clear the file name */
1400 if (FileObject
->FileName
.Buffer
)
1402 ExFreePoolWithTag(FileObject
->FileName
.Buffer
, TAG_IO_NAME
);
1403 FileObject
->FileName
.Buffer
= NULL
;
1406 /* Check if the FO had a completion port */
1407 if (FileObject
->CompletionContext
)
1410 ObDereferenceObject(FileObject
->CompletionContext
->Port
);
1411 ExFreePool(FileObject
->CompletionContext
);
1414 /* Check if the FO had extension */
1415 if (FileObject
->Flags
& FO_FILE_OBJECT_HAS_EXTENSION
)
1417 /* Release filter context structure if any */
1418 FsRtlPTeardownPerFileObjectContexts(FileObject
);
1421 /* Check if dereference has been done yet */
1422 if (!DereferenceDone
)
1424 /* Dereference device object */
1425 IopDereferenceDeviceObject(FileObject
->DeviceObject
, FALSE
);
1432 IopGetDeviceAttachmentBase(IN PDEVICE_OBJECT DeviceObject
)
1434 PDEVICE_OBJECT PDO
= DeviceObject
;
1436 /* Go down the stack to attempt to get the PDO */
1437 for (; ((PEXTENDED_DEVOBJ_EXTENSION
)PDO
->DeviceObjectExtension
)->AttachedTo
!= NULL
;
1438 PDO
= ((PEXTENDED_DEVOBJ_EXTENSION
)PDO
->DeviceObjectExtension
)->AttachedTo
);
1445 IopGetDevicePDO(IN PDEVICE_OBJECT DeviceObject
)
1450 ASSERT(DeviceObject
!= NULL
);
1452 OldIrql
= KeAcquireQueuedSpinLock(LockQueueIoDatabaseLock
);
1453 /* Get the base DO */
1454 PDO
= IopGetDeviceAttachmentBase(DeviceObject
);
1455 /* Check whether that's really a PDO and if so, keep it */
1456 if ((PDO
->Flags
& DO_BUS_ENUMERATED_DEVICE
) != DO_BUS_ENUMERATED_DEVICE
)
1462 ObReferenceObject(PDO
);
1464 KeReleaseQueuedSpinLock(LockQueueIoDatabaseLock
, OldIrql
);
1471 IopSetDeviceSecurityDescriptor(IN PDEVICE_OBJECT DeviceObject
,
1472 IN PSECURITY_INFORMATION SecurityInformation
,
1473 IN PSECURITY_DESCRIPTOR SecurityDescriptor
,
1474 IN POOL_TYPE PoolType
,
1475 IN PGENERIC_MAPPING GenericMapping
)
1478 PSECURITY_DESCRIPTOR OldSecurityDescriptor
, CachedSecurityDescriptor
, NewSecurityDescriptor
;
1482 /* Keep attempting till we find our old SD or fail */
1485 KeEnterCriticalRegion();
1486 ExAcquireResourceSharedLite(&IopSecurityResource
, TRUE
);
1488 /* Get our old SD and reference it */
1489 OldSecurityDescriptor
= DeviceObject
->SecurityDescriptor
;
1490 if (OldSecurityDescriptor
!= NULL
)
1492 ObReferenceSecurityDescriptor(OldSecurityDescriptor
, 1);
1495 ExReleaseResourceLite(&IopSecurityResource
);
1496 KeLeaveCriticalRegion();
1498 /* Set the SD information */
1499 NewSecurityDescriptor
= OldSecurityDescriptor
;
1500 Status
= SeSetSecurityDescriptorInfo(NULL
, SecurityInformation
,
1501 SecurityDescriptor
, &NewSecurityDescriptor
,
1502 PoolType
, GenericMapping
);
1504 if (!NT_SUCCESS(Status
))
1506 if (OldSecurityDescriptor
!= NULL
)
1508 ObDereferenceSecurityDescriptor(OldSecurityDescriptor
, 1);
1514 /* Add the new DS to the internal cache */
1515 Status
= ObLogSecurityDescriptor(NewSecurityDescriptor
,
1516 &CachedSecurityDescriptor
, 1);
1517 ExFreePool(NewSecurityDescriptor
);
1518 if (!NT_SUCCESS(Status
))
1520 ObDereferenceSecurityDescriptor(OldSecurityDescriptor
, 1);
1524 KeEnterCriticalRegion();
1525 ExAcquireResourceExclusiveLite(&IopSecurityResource
, TRUE
);
1526 /* Check if someone changed it in our back */
1527 if (DeviceObject
->SecurityDescriptor
== OldSecurityDescriptor
)
1529 /* We're clear, do the swap */
1530 DeviceObject
->SecurityDescriptor
= CachedSecurityDescriptor
;
1531 ExReleaseResourceLite(&IopSecurityResource
);
1532 KeLeaveCriticalRegion();
1534 /* And dereference old SD (twice - us + not in use) */
1535 ObDereferenceSecurityDescriptor(OldSecurityDescriptor
, 2);
1539 ExReleaseResourceLite(&IopSecurityResource
);
1540 KeLeaveCriticalRegion();
1542 /* If so, try again */
1543 ObDereferenceSecurityDescriptor(OldSecurityDescriptor
, 1);
1544 ObDereferenceSecurityDescriptor(CachedSecurityDescriptor
, 1);
1552 IopSetDeviceSecurityDescriptors(IN PDEVICE_OBJECT UpperDeviceObject
,
1553 IN PDEVICE_OBJECT PhysicalDeviceObject
,
1554 IN PSECURITY_INFORMATION SecurityInformation
,
1555 IN PSECURITY_DESCRIPTOR SecurityDescriptor
,
1556 IN POOL_TYPE PoolType
,
1557 IN PGENERIC_MAPPING GenericMapping
)
1559 PDEVICE_OBJECT CurrentDO
= PhysicalDeviceObject
, NextDevice
;
1560 NTSTATUS Status
= STATUS_SUCCESS
, TmpStatus
;
1564 ASSERT(PhysicalDeviceObject
!= NULL
);
1566 /* We always reference the DO we're working on */
1567 ObReferenceObject(CurrentDO
);
1569 /* Go up from PDO to latest DO */
1572 /* Attempt to set the new SD on it */
1573 TmpStatus
= IopSetDeviceSecurityDescriptor(CurrentDO
, SecurityInformation
,
1574 SecurityDescriptor
, PoolType
,
1576 /* Was our last one? Remember that status then */
1577 if (CurrentDO
== UpperDeviceObject
)
1582 /* Try to move to the next DO (and thus, reference it) */
1583 NextDevice
= CurrentDO
->AttachedDevice
;
1586 ObReferenceObject(NextDevice
);
1589 /* Dereference current DO and move to the next one */
1590 ObDereferenceObject(CurrentDO
);
1591 CurrentDO
= NextDevice
;
1593 while (CurrentDO
!= NULL
);
1600 IopGetSetSecurityObject(IN PVOID ObjectBody
,
1601 IN SECURITY_OPERATION_CODE OperationCode
,
1602 IN PSECURITY_INFORMATION SecurityInformation
,
1603 IN PSECURITY_DESCRIPTOR SecurityDescriptor
,
1604 IN OUT PULONG BufferLength
,
1605 IN OUT PSECURITY_DESCRIPTOR
*OldSecurityDescriptor
,
1606 IN POOL_TYPE PoolType
,
1607 IN OUT PGENERIC_MAPPING GenericMapping
)
1609 IO_STATUS_BLOCK IoStatusBlock
;
1610 PIO_STACK_LOCATION StackPtr
;
1611 PFILE_OBJECT FileObject
;
1612 PDEVICE_OBJECT DeviceObject
;
1614 BOOLEAN LocalEvent
= FALSE
;
1616 NTSTATUS Status
= STATUS_SUCCESS
;
1618 IOTRACE(IO_FILE_DEBUG
, "ObjectBody: %p\n", ObjectBody
);
1620 /* Check if this is a device or file */
1621 if (((PFILE_OBJECT
)ObjectBody
)->Type
== IO_TYPE_DEVICE
)
1624 DeviceObject
= (PDEVICE_OBJECT
)ObjectBody
;
1630 FileObject
= (PFILE_OBJECT
)ObjectBody
;
1632 /* Check if this is a direct open */
1633 if (FileObject
->Flags
& FO_DIRECT_DEVICE_OPEN
)
1635 /* Get the Device Object */
1636 DeviceObject
= IoGetAttachedDevice(FileObject
->DeviceObject
);
1640 /* Otherwise, use the direct device*/
1641 DeviceObject
= FileObject
->DeviceObject
;
1645 /* Check if the request was for a device object */
1646 if (!(FileObject
) ||
1647 (!(FileObject
->FileName
.Length
) && !(FileObject
->RelatedFileObject
)) ||
1648 (FileObject
->Flags
& FO_DIRECT_DEVICE_OPEN
))
1650 /* Check what kind of request this was */
1651 if (OperationCode
== QuerySecurityDescriptor
)
1653 return SeQuerySecurityDescriptorInfo(SecurityInformation
,
1656 &DeviceObject
->SecurityDescriptor
);
1658 else if (OperationCode
== DeleteSecurityDescriptor
)
1660 /* Simply return success */
1661 return STATUS_SUCCESS
;
1663 else if (OperationCode
== AssignSecurityDescriptor
)
1665 Status
= STATUS_SUCCESS
;
1667 /* Make absolutely sure this is a device object */
1668 if (!(FileObject
) || !(FileObject
->Flags
& FO_STREAM_FILE
))
1670 PSECURITY_DESCRIPTOR CachedSecurityDescriptor
;
1672 /* Add the security descriptor in cache */
1673 Status
= ObLogSecurityDescriptor(SecurityDescriptor
, &CachedSecurityDescriptor
, 1);
1674 if (NT_SUCCESS(Status
))
1676 KeEnterCriticalRegion();
1677 ExAcquireResourceExclusiveLite(&IopSecurityResource
, TRUE
);
1679 /* Assign the Security Descriptor */
1680 DeviceObject
->SecurityDescriptor
= CachedSecurityDescriptor
;
1682 ExReleaseResourceLite(&IopSecurityResource
);
1683 KeLeaveCriticalRegion();
1690 else if (OperationCode
== SetSecurityDescriptor
)
1692 /* Get the Physical Device Object if any */
1693 PDEVICE_OBJECT PDO
= IopGetDevicePDO(DeviceObject
);
1697 /* Apply the new SD to any DO in the path from PDO to current DO */
1698 Status
= IopSetDeviceSecurityDescriptors(DeviceObject
, PDO
,
1699 SecurityInformation
,
1701 PoolType
, GenericMapping
);
1702 ObDereferenceObject(PDO
);
1706 /* Otherwise, just set for ourselves */
1707 Status
= IopSetDeviceSecurityDescriptor(DeviceObject
,
1708 SecurityInformation
,
1710 PoolType
, GenericMapping
);
1713 return STATUS_SUCCESS
;
1716 /* Shouldn't happen */
1717 return STATUS_SUCCESS
;
1719 else if (OperationCode
== DeleteSecurityDescriptor
)
1721 /* Same as for devices, do nothing */
1722 return STATUS_SUCCESS
;
1725 /* At this point, we know we're a file. Reference it */
1726 ObReferenceObject(FileObject
);
1728 /* Check if we should use Sync IO or not */
1729 if (FileObject
->Flags
& FO_SYNCHRONOUS_IO
)
1731 /* Lock the file object */
1732 Status
= IopLockFileObject(FileObject
, ExGetPreviousMode());
1733 if (Status
!= STATUS_SUCCESS
)
1735 ObDereferenceObject(FileObject
);
1741 /* Use local event */
1742 KeInitializeEvent(&Event
, SynchronizationEvent
, FALSE
);
1746 /* Clear the File Object event */
1747 KeClearEvent(&FileObject
->Event
);
1749 /* Get the device object */
1750 DeviceObject
= IoGetRelatedDeviceObject(FileObject
);
1752 /* Allocate the IRP */
1753 Irp
= IoAllocateIrp(DeviceObject
->StackSize
, FALSE
);
1754 if (!Irp
) return IopCleanupFailedIrp(FileObject
, NULL
, NULL
);
1757 Irp
->Tail
.Overlay
.OriginalFileObject
= FileObject
;
1758 Irp
->Tail
.Overlay
.Thread
= PsGetCurrentThread();
1759 Irp
->RequestorMode
= ExGetPreviousMode();
1760 Irp
->UserIosb
= &IoStatusBlock
;
1761 Irp
->UserEvent
= (LocalEvent
) ? &Event
: NULL
;
1762 Irp
->Flags
= (LocalEvent
) ? IRP_SYNCHRONOUS_API
: 0;
1763 Irp
->Overlay
.AsynchronousParameters
.UserApcRoutine
= NULL
;
1765 /* Set Stack Parameters */
1766 StackPtr
= IoGetNextIrpStackLocation(Irp
);
1767 StackPtr
->FileObject
= FileObject
;
1769 /* Check if this is a query or set */
1770 if (OperationCode
== QuerySecurityDescriptor
)
1772 /* Set the major function and parameters */
1773 StackPtr
->MajorFunction
= IRP_MJ_QUERY_SECURITY
;
1774 StackPtr
->Parameters
.QuerySecurity
.SecurityInformation
=
1775 *SecurityInformation
;
1776 StackPtr
->Parameters
.QuerySecurity
.Length
= *BufferLength
;
1777 Irp
->UserBuffer
= SecurityDescriptor
;
1781 /* Set the major function and parameters for a set */
1782 StackPtr
->MajorFunction
= IRP_MJ_SET_SECURITY
;
1783 StackPtr
->Parameters
.SetSecurity
.SecurityInformation
=
1784 *SecurityInformation
;
1785 StackPtr
->Parameters
.SetSecurity
.SecurityDescriptor
=
1790 IopQueueIrpToThread(Irp
);
1792 /* Update operation counts */
1793 IopUpdateOperationCount(IopOtherTransfer
);
1795 /* Call the Driver */
1796 Status
= IoCallDriver(DeviceObject
, Irp
);
1798 /* Check if this was async I/O */
1801 /* Check if the IRP is pending completion */
1802 if (Status
== STATUS_PENDING
)
1804 /* Wait on the local event */
1805 KeWaitForSingleObject(&Event
,
1810 Status
= IoStatusBlock
.Status
;
1815 /* Check if the IRP is pending completion */
1816 if (Status
== STATUS_PENDING
)
1818 /* Wait on the file object */
1819 KeWaitForSingleObject(&FileObject
->Event
,
1824 Status
= FileObject
->FinalStatus
;
1827 /* Release the lock */
1828 IopUnlockFileObject(FileObject
);
1831 /* This Driver doesn't implement Security, so try to give it a default */
1832 if (Status
== STATUS_INVALID_DEVICE_REQUEST
)
1834 /* Was this a query? */
1835 if (OperationCode
== QuerySecurityDescriptor
)
1837 /* Set a World Security Descriptor */
1838 Status
= SeSetWorldSecurityDescriptor(*SecurityInformation
,
1844 /* It wasn't a query, so just fake success */
1845 Status
= STATUS_SUCCESS
;
1848 else if (OperationCode
== QuerySecurityDescriptor
)
1850 /* Callers usually expect the normalized form */
1851 if (Status
== STATUS_BUFFER_OVERFLOW
) Status
= STATUS_BUFFER_TOO_SMALL
;
1856 *BufferLength
= (ULONG
)IoStatusBlock
.Information
;
1858 _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER
)
1860 /* Get the exception code */
1861 Status
= _SEH2_GetExceptionCode();
1872 IopQueryName(IN PVOID ObjectBody
,
1874 OUT POBJECT_NAME_INFORMATION ObjectNameInfo
,
1876 OUT PULONG ReturnLength
,
1877 IN KPROCESSOR_MODE PreviousMode
)
1879 return IopQueryNameInternal(ObjectBody
,
1890 IopQueryNameInternal(IN PVOID ObjectBody
,
1892 IN BOOLEAN QueryDosName
,
1893 OUT POBJECT_NAME_INFORMATION ObjectNameInfo
,
1895 OUT PULONG ReturnLength
,
1896 IN KPROCESSOR_MODE PreviousMode
)
1898 POBJECT_NAME_INFORMATION LocalInfo
;
1899 PFILE_NAME_INFORMATION LocalFileInfo
;
1900 PFILE_OBJECT FileObject
= (PFILE_OBJECT
)ObjectBody
;
1901 ULONG LocalReturnLength
, FileLength
;
1902 BOOLEAN LengthMismatch
= FALSE
;
1905 PDEVICE_OBJECT DeviceObject
;
1908 IOTRACE(IO_FILE_DEBUG
, "ObjectBody: %p\n", ObjectBody
);
1910 /* Validate length */
1911 if (Length
< sizeof(OBJECT_NAME_INFORMATION
))
1913 /* Wrong length, fail */
1914 *ReturnLength
= sizeof(OBJECT_NAME_INFORMATION
);
1915 return STATUS_INFO_LENGTH_MISMATCH
;
1918 /* Allocate Buffer */
1919 LocalInfo
= ExAllocatePoolWithTag(PagedPool
, Length
, TAG_IO
);
1920 if (!LocalInfo
) return STATUS_INSUFFICIENT_RESOURCES
;
1922 /* Query DOS name if the caller asked to */
1926 DeviceObject
= FileObject
->DeviceObject
;
1928 /* In case of a network file system, don't call mountmgr */
1929 if (DeviceObject
->DeviceType
== FILE_DEVICE_NETWORK_FILE_SYSTEM
)
1931 /* We'll store separator and terminator */
1932 LocalReturnLength
= sizeof(OBJECT_NAME_INFORMATION
) + 2 * sizeof(WCHAR
);
1933 if (Length
< LocalReturnLength
)
1935 Status
= STATUS_BUFFER_OVERFLOW
;
1939 LocalInfo
->Name
.Length
= sizeof(WCHAR
);
1940 LocalInfo
->Name
.MaximumLength
= sizeof(WCHAR
);
1941 LocalInfo
->Name
.Buffer
= (PVOID
)((ULONG_PTR
)LocalInfo
+ sizeof(OBJECT_NAME_INFORMATION
));
1942 LocalInfo
->Name
.Buffer
[0] = OBJ_NAME_PATH_SEPARATOR
;
1943 Status
= STATUS_SUCCESS
;
1946 /* Otherwise, call mountmgr to get DOS name */
1949 Status
= IoVolumeDeviceToDosName(DeviceObject
, &LocalInfo
->Name
);
1950 LocalReturnLength
= LocalInfo
->Name
.Length
+ sizeof(OBJECT_NAME_INFORMATION
) + sizeof(WCHAR
);
1954 /* Fall back if querying DOS name failed or if caller never wanted it ;-) */
1955 if (!QueryDosName
|| !NT_SUCCESS(Status
))
1957 /* Query the name */
1958 Status
= ObQueryNameString(FileObject
->DeviceObject
,
1961 &LocalReturnLength
);
1968 if (!NT_SUCCESS(Status
) && (Status
!= STATUS_INFO_LENGTH_MISMATCH
))
1970 /* Free the buffer and fail */
1971 ExFreePoolWithTag(LocalInfo
, TAG_IO
);
1975 /* Get buffer pointer */
1976 p
= (PWCHAR
)(ObjectNameInfo
+ 1);
1980 /* Copy the information */
1981 if (QueryDosName
&& NoObCall
)
1983 ASSERT(PreviousMode
== KernelMode
);
1985 /* Copy structure first */
1986 RtlCopyMemory(ObjectNameInfo
,
1988 (Length
>= LocalReturnLength
? sizeof(OBJECT_NAME_INFORMATION
) : Length
));
1990 RtlCopyMemory(p
, LocalInfo
->Name
.Buffer
,
1991 (Length
>= LocalReturnLength
? LocalInfo
->Name
.Length
: Length
- sizeof(OBJECT_NAME_INFORMATION
)));
1993 if (FileObject
->DeviceObject
->DeviceType
!= FILE_DEVICE_NETWORK_FILE_SYSTEM
)
1995 ExFreePool(LocalInfo
->Name
.Buffer
);
2000 RtlCopyMemory(ObjectNameInfo
,
2002 (LocalReturnLength
> Length
) ?
2003 Length
: LocalReturnLength
);
2006 /* Set buffer pointer */
2007 ObjectNameInfo
->Name
.Buffer
= p
;
2009 /* Advance in buffer */
2010 p
+= (LocalInfo
->Name
.Length
/ sizeof(WCHAR
));
2012 /* Check if this already filled our buffer */
2013 if (LocalReturnLength
> Length
)
2015 /* Set the length mismatch to true, so that we can return
2016 * the proper buffer size to the caller later
2018 LengthMismatch
= TRUE
;
2020 /* Save the initial buffer length value */
2021 *ReturnLength
= LocalReturnLength
;
2024 /* Now get the file name buffer and check the length needed */
2025 LocalFileInfo
= (PFILE_NAME_INFORMATION
)LocalInfo
;
2026 FileLength
= Length
-
2028 FIELD_OFFSET(FILE_NAME_INFORMATION
, FileName
);
2030 /* Query the File name */
2031 if (PreviousMode
== KernelMode
&&
2032 BooleanFlagOn(FileObject
->Flags
, FO_SYNCHRONOUS_IO
))
2034 Status
= IopGetFileInformation(FileObject
,
2035 LengthMismatch
? Length
: FileLength
,
2036 FileNameInformation
,
2038 &LocalReturnLength
);
2042 Status
= IoQueryFileInformation(FileObject
,
2043 FileNameInformation
,
2044 LengthMismatch
? Length
: FileLength
,
2046 &LocalReturnLength
);
2048 if (NT_ERROR(Status
))
2050 /* Allow status that would mean it's not implemented in the storage stack */
2051 if (Status
!= STATUS_INVALID_PARAMETER
&& Status
!= STATUS_INVALID_DEVICE_REQUEST
&&
2052 Status
!= STATUS_NOT_IMPLEMENTED
&& Status
!= STATUS_INVALID_INFO_CLASS
)
2057 /* In such case, zero output */
2058 LocalReturnLength
= FIELD_OFFSET(FILE_NAME_INFORMATION
, FileName
);
2059 LocalFileInfo
->FileNameLength
= 0;
2060 LocalFileInfo
->FileName
[0] = OBJ_NAME_PATH_SEPARATOR
;
2064 /* We'll at least return the name length */
2065 if (LocalReturnLength
< FIELD_OFFSET(FILE_NAME_INFORMATION
, FileName
))
2067 LocalReturnLength
= FIELD_OFFSET(FILE_NAME_INFORMATION
, FileName
);
2071 /* If the provided buffer is too small, return the required size */
2074 /* Add the required length */
2075 *ReturnLength
+= LocalFileInfo
->FileNameLength
;
2077 /* Free the allocated buffer and return failure */
2078 Status
= STATUS_BUFFER_OVERFLOW
;
2082 /* Now calculate the new lengths left */
2083 FileLength
= LocalReturnLength
-
2084 FIELD_OFFSET(FILE_NAME_INFORMATION
, FileName
);
2085 LocalReturnLength
= (ULONG
)((ULONG_PTR
)p
-
2086 (ULONG_PTR
)ObjectNameInfo
+
2087 LocalFileInfo
->FileNameLength
);
2089 /* Don't copy the name if it's not valid */
2090 if (LocalFileInfo
->FileName
[0] != OBJ_NAME_PATH_SEPARATOR
)
2092 /* Free the allocated buffer and return failure */
2093 Status
= STATUS_OBJECT_PATH_INVALID
;
2097 /* Write the Name and null-terminate it */
2098 RtlCopyMemory(p
, LocalFileInfo
->FileName
, FileLength
);
2099 p
+= (FileLength
/ sizeof(WCHAR
));
2101 LocalReturnLength
+= sizeof(UNICODE_NULL
);
2103 /* Return the length needed */
2104 *ReturnLength
= LocalReturnLength
;
2106 /* Setup the length and maximum length */
2107 FileLength
= (ULONG
)((ULONG_PTR
)p
- (ULONG_PTR
)ObjectNameInfo
);
2108 ObjectNameInfo
->Name
.Length
= (USHORT
)FileLength
-
2109 sizeof(OBJECT_NAME_INFORMATION
);
2110 ObjectNameInfo
->Name
.MaximumLength
= (USHORT
)ObjectNameInfo
->Name
.Length
+
2111 sizeof(UNICODE_NULL
);
2115 /* Free buffer and return */
2116 ExFreePoolWithTag(LocalInfo
, TAG_IO
);
2124 IopCloseFile(IN PEPROCESS Process OPTIONAL
,
2125 IN PVOID ObjectBody
,
2126 IN ACCESS_MASK GrantedAccess
,
2127 IN ULONG HandleCount
,
2128 IN ULONG SystemHandleCount
)
2130 PFILE_OBJECT FileObject
= (PFILE_OBJECT
)ObjectBody
;
2133 PIO_STACK_LOCATION StackPtr
;
2135 PDEVICE_OBJECT DeviceObject
;
2137 IO_STATUS_BLOCK IoStatusBlock
;
2138 IOTRACE(IO_FILE_DEBUG
, "ObjectBody: %p\n", ObjectBody
);
2140 /* If this isn't the last handle for the current process, quit */
2141 if (HandleCount
!= 1) return;
2143 /* Check if the file is locked and has more then one handle opened */
2144 if ((FileObject
->LockOperation
) && (SystemHandleCount
!= 1))
2146 /* Check if this is a direct open or not */
2147 if (BooleanFlagOn(FileObject
->Flags
, FO_DIRECT_DEVICE_OPEN
))
2149 /* Get the attached device */
2150 DeviceObject
= IoGetAttachedDevice(FileObject
->DeviceObject
);
2154 /* Get the FO's device */
2155 DeviceObject
= IoGetRelatedDeviceObject(FileObject
);
2158 /* Check if this is a sync FO and lock it */
2159 if (BooleanFlagOn(FileObject
->Flags
, FO_SYNCHRONOUS_IO
))
2161 (VOID
)IopLockFileObject(FileObject
, KernelMode
);
2164 /* Go the FastIO path if possible, otherwise fall back to IRP */
2165 if (DeviceObject
->DriverObject
->FastIoDispatch
== NULL
||
2166 DeviceObject
->DriverObject
->FastIoDispatch
->FastIoUnlockAll
== NULL
||
2167 !DeviceObject
->DriverObject
->FastIoDispatch
->FastIoUnlockAll(FileObject
, PsGetCurrentProcess(), &IoStatusBlock
, DeviceObject
))
2169 /* Clear and set up Events */
2170 KeClearEvent(&FileObject
->Event
);
2171 KeInitializeEvent(&Event
, SynchronizationEvent
, FALSE
);
2173 /* Allocate an IRP */
2174 Irp
= IopAllocateIrpMustSucceed(DeviceObject
->StackSize
);
2177 Irp
->UserEvent
= &Event
;
2178 Irp
->UserIosb
= &Irp
->IoStatus
;
2179 Irp
->Tail
.Overlay
.Thread
= PsGetCurrentThread();
2180 Irp
->Tail
.Overlay
.OriginalFileObject
= FileObject
;
2181 Irp
->RequestorMode
= KernelMode
;
2182 Irp
->Flags
= IRP_SYNCHRONOUS_API
;
2183 Irp
->Overlay
.AsynchronousParameters
.UserApcRoutine
= NULL
;
2184 ObReferenceObject(FileObject
);
2186 /* Set up Stack Pointer Data */
2187 StackPtr
= IoGetNextIrpStackLocation(Irp
);
2188 StackPtr
->MajorFunction
= IRP_MJ_LOCK_CONTROL
;
2189 StackPtr
->MinorFunction
= IRP_MN_UNLOCK_ALL
;
2190 StackPtr
->FileObject
= FileObject
;
2193 IopQueueIrpToThread(Irp
);
2195 /* Call the FS Driver */
2196 Status
= IoCallDriver(DeviceObject
, Irp
);
2197 if (Status
== STATUS_PENDING
)
2199 /* Wait for completion */
2200 KeWaitForSingleObject(&Event
, UserRequest
, KernelMode
, FALSE
, NULL
);
2203 /* IO will unqueue & free for us */
2206 /* Release the lock if we were holding it */
2207 if (BooleanFlagOn(FileObject
->Flags
, FO_SYNCHRONOUS_IO
))
2209 IopUnlockFileObject(FileObject
);
2213 /* Make sure this is the last handle */
2214 if (SystemHandleCount
!= 1) return;
2216 /* Check if this is a direct open or not */
2217 if (FileObject
->Flags
& FO_DIRECT_DEVICE_OPEN
)
2219 /* Get the attached device */
2220 DeviceObject
= IoGetAttachedDevice(FileObject
->DeviceObject
);
2224 /* Get the FO's device */
2225 DeviceObject
= IoGetRelatedDeviceObject(FileObject
);
2228 /* Set the handle created flag */
2229 FileObject
->Flags
|= FO_HANDLE_CREATED
;
2231 /* Check if this is a sync FO and lock it */
2232 if (Process
!= NULL
&&
2233 BooleanFlagOn(FileObject
->Flags
, FO_SYNCHRONOUS_IO
))
2235 (VOID
)IopLockFileObject(FileObject
, KernelMode
);
2238 /* Clear and set up Events */
2239 KeClearEvent(&FileObject
->Event
);
2240 KeInitializeEvent(&Event
, SynchronizationEvent
, FALSE
);
2242 /* Allocate an IRP */
2243 Irp
= IopAllocateIrpMustSucceed(DeviceObject
->StackSize
);
2246 Irp
->UserEvent
= &Event
;
2247 Irp
->UserIosb
= &Irp
->IoStatus
;
2248 Irp
->Tail
.Overlay
.Thread
= PsGetCurrentThread();
2249 Irp
->Tail
.Overlay
.OriginalFileObject
= FileObject
;
2250 Irp
->Overlay
.AsynchronousParameters
.UserApcRoutine
= NULL
;
2251 Irp
->Flags
= IRP_CLOSE_OPERATION
| IRP_SYNCHRONOUS_API
;
2253 /* Set up Stack Pointer Data */
2254 StackPtr
= IoGetNextIrpStackLocation(Irp
);
2255 StackPtr
->MajorFunction
= IRP_MJ_CLEANUP
;
2256 StackPtr
->FileObject
= FileObject
;
2259 IopQueueIrpToThread(Irp
);
2261 /* Update operation counts */
2262 IopUpdateOperationCount(IopOtherTransfer
);
2264 /* Call the FS Driver */
2265 Status
= IoCallDriver(DeviceObject
, Irp
);
2266 if (Status
== STATUS_PENDING
)
2268 /* Wait for completion */
2269 KeWaitForSingleObject(&Event
, UserRequest
, KernelMode
, FALSE
, NULL
);
2272 /* Unqueue the IRP */
2273 KeRaiseIrql(APC_LEVEL
, &OldIrql
);
2274 IopUnQueueIrpFromThread(Irp
);
2275 KeLowerIrql(OldIrql
);
2280 /* Release the lock if we were holding it */
2281 if (Process
!= NULL
&&
2282 BooleanFlagOn(FileObject
->Flags
, FO_SYNCHRONOUS_IO
))
2284 IopUnlockFileObject(FileObject
);
2290 IopQueryAttributesFile(IN POBJECT_ATTRIBUTES ObjectAttributes
,
2291 IN FILE_INFORMATION_CLASS FileInformationClass
,
2292 IN ULONG FileInformationSize
,
2293 OUT PVOID FileInformation
)
2296 KPROCESSOR_MODE AccessMode
= ExGetPreviousMode();
2297 DUMMY_FILE_OBJECT LocalFileObject
;
2298 FILE_NETWORK_OPEN_INFORMATION NetworkOpenInfo
;
2300 OPEN_PACKET OpenPacket
;
2303 IOTRACE(IO_FILE_DEBUG
, "Class: %lx\n", FileInformationClass
);
2305 /* Check if the caller was user mode */
2306 if (AccessMode
!= KernelMode
)
2308 /* Protect probe in SEH */
2311 /* Probe the buffer */
2312 ProbeForWrite(FileInformation
, FileInformationSize
, sizeof(ULONG
));
2314 _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER
)
2316 /* Return the exception code */
2317 _SEH2_YIELD(return _SEH2_GetExceptionCode());
2322 /* Check if this is a basic or full request */
2323 IsBasic
= (FileInformationSize
== sizeof(FILE_BASIC_INFORMATION
));
2325 /* Setup the Open Packet */
2326 RtlZeroMemory(&OpenPacket
, sizeof(OPEN_PACKET
));
2327 OpenPacket
.Type
= IO_TYPE_OPEN_PACKET
;
2328 OpenPacket
.Size
= sizeof(OPEN_PACKET
);
2329 OpenPacket
.CreateOptions
= FILE_OPEN_REPARSE_POINT
;
2330 OpenPacket
.ShareAccess
= FILE_SHARE_READ
| FILE_SHARE_WRITE
| FILE_SHARE_DELETE
;
2331 OpenPacket
.Disposition
= FILE_OPEN
;
2332 OpenPacket
.BasicInformation
= IsBasic
? FileInformation
: NULL
;
2333 OpenPacket
.NetworkInformation
= IsBasic
? &NetworkOpenInfo
:
2334 (AccessMode
!= KernelMode
) ?
2335 &NetworkOpenInfo
: FileInformation
;
2336 OpenPacket
.QueryOnly
= TRUE
;
2337 OpenPacket
.FullAttributes
= IsBasic
? FALSE
: TRUE
;
2338 OpenPacket
.LocalFileObject
= &LocalFileObject
;
2340 /* Update the operation count */
2341 IopUpdateOperationCount(IopOtherTransfer
);
2344 * Attempt opening the file. This will call the I/O Parse Routine for
2345 * the File Object (IopParseDevice) which will use the dummy file obejct
2346 * send the IRP to its device object. Note that we have two statuses
2347 * to worry about: the Object Manager's status (in Status) and the I/O
2348 * status, which is in the Open Packet's Final Status, and determined
2349 * by the Parse Check member.
2351 Status
= ObOpenObjectByName(ObjectAttributes
,
2355 FILE_READ_ATTRIBUTES
,
2358 if (OpenPacket
.ParseCheck
== FALSE
)
2361 DPRINT("IopQueryAttributesFile failed for '%wZ' with 0x%lx\n",
2362 ObjectAttributes
->ObjectName
, Status
);
2367 /* Use the Io status */
2368 Status
= OpenPacket
.FinalStatus
;
2371 /* Check if we were succesful and this was user mode and a full query */
2372 if ((NT_SUCCESS(Status
)) && (AccessMode
!= KernelMode
) && !(IsBasic
))
2374 /* Enter SEH for copy */
2377 /* Copy the buffer back */
2378 RtlCopyMemory(FileInformation
,
2380 FileInformationSize
);
2382 _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER
)
2384 /* Get exception code */
2385 Status
= _SEH2_GetExceptionCode();
2396 IopAcquireFileObjectLock(
2397 _In_ PFILE_OBJECT FileObject
,
2398 _In_ KPROCESSOR_MODE WaitMode
,
2399 _In_ BOOLEAN Alertable
,
2400 _Out_ PBOOLEAN LockFailed
)
2406 InterlockedIncrement((PLONG
)&FileObject
->Waiters
);
2408 Status
= STATUS_SUCCESS
;
2411 if (!InterlockedExchange((PLONG
)&FileObject
->Busy
, TRUE
))
2415 Status
= KeWaitForSingleObject(&FileObject
->Lock
,
2420 } while (Status
== STATUS_SUCCESS
);
2422 InterlockedDecrement((PLONG
)&FileObject
->Waiters
);
2423 if (Status
== STATUS_SUCCESS
)
2425 ObReferenceObject(FileObject
);
2426 *LockFailed
= FALSE
;
2430 if (!FileObject
->Busy
&& FileObject
->Waiters
)
2432 KeSetEvent(&FileObject
->Lock
, IO_NO_INCREMENT
, FALSE
);
2442 IoGetFileObjectFilterContext(IN PFILE_OBJECT FileObject
)
2444 if (FileObject
->Flags
& FO_FILE_OBJECT_HAS_EXTENSION
)
2446 PFILE_OBJECT_EXTENSION FileObjectExtension
;
2448 FileObjectExtension
= FileObject
->FileObjectExtension
;
2449 return FileObjectExtension
->FilterContext
;
2457 IoChangeFileObjectFilterContext(IN PFILE_OBJECT FileObject
,
2458 IN PVOID FilterContext
,
2461 if (!(FileObject
->Flags
& FO_FILE_OBJECT_HAS_EXTENSION
))
2463 return STATUS_INVALID_PARAMETER
;
2468 return STATUS_NOT_IMPLEMENTED
;
2473 IopCreateFile(OUT PHANDLE FileHandle
,
2474 IN ACCESS_MASK DesiredAccess
,
2475 IN POBJECT_ATTRIBUTES ObjectAttributes
,
2476 OUT PIO_STATUS_BLOCK IoStatusBlock
,
2477 IN PLARGE_INTEGER AllocationSize OPTIONAL
,
2478 IN ULONG FileAttributes
,
2479 IN ULONG ShareAccess
,
2480 IN ULONG Disposition
,
2481 IN ULONG CreateOptions
,
2482 IN PVOID EaBuffer OPTIONAL
,
2484 IN CREATE_FILE_TYPE CreateFileType
,
2485 IN PVOID ExtraCreateParameters OPTIONAL
,
2488 IN PDEVICE_OBJECT DeviceObject OPTIONAL
)
2490 KPROCESSOR_MODE AccessMode
;
2491 HANDLE LocalHandle
= 0;
2492 LARGE_INTEGER SafeAllocationSize
;
2493 NTSTATUS Status
= STATUS_SUCCESS
;
2494 PNAMED_PIPE_CREATE_PARAMETERS NamedPipeCreateParameters
;
2495 POPEN_PACKET OpenPacket
;
2496 ULONG EaErrorOffset
;
2499 IOTRACE(IO_FILE_DEBUG
, "FileName: %wZ\n", ObjectAttributes
->ObjectName
);
2502 /* Check if we have no parameter checking to do */
2503 if (Options
& IO_NO_PARAMETER_CHECKING
)
2505 /* Then force kernel-mode access to avoid checks */
2506 AccessMode
= KernelMode
;
2510 /* Otherwise, use the actual mode */
2511 AccessMode
= ExGetPreviousMode();
2514 /* Check if we need to do parameter checking */
2515 if ((AccessMode
!= KernelMode
) || (Options
& IO_CHECK_CREATE_PARAMETERS
))
2517 /* Validate parameters */
2518 if (FileAttributes
& ~FILE_ATTRIBUTE_VALID_FLAGS
)
2520 DPRINT1("File Create 'FileAttributes' Parameter contains invalid flags!\n");
2521 return STATUS_INVALID_PARAMETER
;
2524 if (ShareAccess
& ~FILE_SHARE_VALID_FLAGS
)
2526 DPRINT1("File Create 'ShareAccess' Parameter contains invalid flags!\n");
2527 return STATUS_INVALID_PARAMETER
;
2530 if (Disposition
> FILE_MAXIMUM_DISPOSITION
)
2532 DPRINT1("File Create 'Disposition' Parameter is out of range!\n");
2533 return STATUS_INVALID_PARAMETER
;
2536 if (CreateOptions
& ~FILE_VALID_OPTION_FLAGS
)
2538 DPRINT1("File Create 'CreateOptions' parameter contains invalid flags!\n");
2539 return STATUS_INVALID_PARAMETER
;
2542 if ((CreateOptions
& (FILE_SYNCHRONOUS_IO_ALERT
| FILE_SYNCHRONOUS_IO_NONALERT
)) &&
2543 (!(DesiredAccess
& SYNCHRONIZE
)))
2545 DPRINT1("File Create 'CreateOptions' parameter FILE_SYNCHRONOUS_IO_* requested, but 'DesiredAccess' does not have SYNCHRONIZE!\n");
2546 return STATUS_INVALID_PARAMETER
;
2549 if ((CreateOptions
& FILE_DELETE_ON_CLOSE
) && (!(DesiredAccess
& DELETE
)))
2551 DPRINT1("File Create 'CreateOptions' parameter FILE_DELETE_ON_CLOSE requested, but 'DesiredAccess' does not have DELETE!\n");
2552 return STATUS_INVALID_PARAMETER
;
2555 if ((CreateOptions
& (FILE_SYNCHRONOUS_IO_NONALERT
| FILE_SYNCHRONOUS_IO_ALERT
)) ==
2556 (FILE_SYNCHRONOUS_IO_NONALERT
| FILE_SYNCHRONOUS_IO_ALERT
))
2558 DPRINT1("File Create 'FileAttributes' parameter both FILE_SYNCHRONOUS_IO_NONALERT and FILE_SYNCHRONOUS_IO_ALERT specified!\n");
2559 return STATUS_INVALID_PARAMETER
;
2562 if ((CreateOptions
& FILE_DIRECTORY_FILE
) && !(CreateOptions
& FILE_NON_DIRECTORY_FILE
) &&
2563 (CreateOptions
& ~(FILE_DIRECTORY_FILE
|
2564 FILE_SYNCHRONOUS_IO_ALERT
|
2565 FILE_SYNCHRONOUS_IO_NONALERT
|
2566 FILE_WRITE_THROUGH
|
2567 FILE_COMPLETE_IF_OPLOCKED
|
2568 FILE_OPEN_FOR_BACKUP_INTENT
|
2569 FILE_DELETE_ON_CLOSE
|
2570 FILE_OPEN_FOR_FREE_SPACE_QUERY
|
2571 FILE_OPEN_BY_FILE_ID
|
2572 FILE_NO_COMPRESSION
|
2573 FILE_OPEN_REPARSE_POINT
)))
2575 DPRINT1("File Create 'CreateOptions' Parameter has flags incompatible with FILE_DIRECTORY_FILE!\n");
2576 return STATUS_INVALID_PARAMETER
;
2579 if ((CreateOptions
& FILE_DIRECTORY_FILE
) && !(CreateOptions
& FILE_NON_DIRECTORY_FILE
) &&
2580 (Disposition
!= FILE_CREATE
) && (Disposition
!= FILE_OPEN
) && (Disposition
!= FILE_OPEN_IF
))
2582 DPRINT1("File Create 'CreateOptions' Parameter FILE_DIRECTORY_FILE requested, but 'Disposition' is not FILE_CREATE/FILE_OPEN/FILE_OPEN_IF!\n");
2583 return STATUS_INVALID_PARAMETER
;
2586 if ((CreateOptions
& FILE_COMPLETE_IF_OPLOCKED
) && (CreateOptions
& FILE_RESERVE_OPFILTER
))
2588 DPRINT1("File Create 'CreateOptions' Parameter both FILE_COMPLETE_IF_OPLOCKED and FILE_RESERVE_OPFILTER specified!\n");
2589 return STATUS_INVALID_PARAMETER
;
2592 if ((CreateOptions
& FILE_NO_INTERMEDIATE_BUFFERING
) && (DesiredAccess
& FILE_APPEND_DATA
))
2594 DPRINT1("File Create 'CreateOptions' parameter FILE_NO_INTERMEDIATE_BUFFERING requested, but 'DesiredAccess' FILE_APPEND_DATA requires it!\n");
2595 return STATUS_INVALID_PARAMETER
;
2598 /* Now check if this is a named pipe */
2599 if (CreateFileType
== CreateFileTypeNamedPipe
)
2601 /* Make sure we have extra parameters */
2602 if (!ExtraCreateParameters
)
2604 DPRINT1("Invalid parameter: ExtraCreateParameters == 0!\n");
2605 return STATUS_INVALID_PARAMETER
;
2608 /* Get the parameters and validate them */
2609 NamedPipeCreateParameters
= ExtraCreateParameters
;
2610 if ((NamedPipeCreateParameters
->NamedPipeType
> FILE_PIPE_MESSAGE_TYPE
) ||
2611 (NamedPipeCreateParameters
->ReadMode
> FILE_PIPE_MESSAGE_MODE
) ||
2612 (NamedPipeCreateParameters
->CompletionMode
> FILE_PIPE_COMPLETE_OPERATION
) ||
2613 (ShareAccess
& FILE_SHARE_DELETE
) ||
2614 ((Disposition
< FILE_OPEN
) || (Disposition
> FILE_OPEN_IF
)) ||
2615 (CreateOptions
& ~FILE_VALID_PIPE_OPTION_FLAGS
))
2617 /* Invalid named pipe create */
2618 DPRINT1("Invalid named pipe create\n");
2619 return STATUS_INVALID_PARAMETER
;
2622 else if (CreateFileType
== CreateFileTypeMailslot
)
2624 /* Make sure we have extra parameters */
2625 if (!ExtraCreateParameters
)
2627 DPRINT1("Invalid parameter: ExtraCreateParameters == 0!\n");
2628 return STATUS_INVALID_PARAMETER
;
2631 /* Get the parameters and validate them */
2632 if ((ShareAccess
& FILE_SHARE_DELETE
) ||
2633 !(ShareAccess
& ~FILE_SHARE_WRITE
) ||
2634 (Disposition
!= FILE_CREATE
) ||
2635 (CreateOptions
& ~FILE_VALID_MAILSLOT_OPTION_FLAGS
))
2637 /* Invalid mailslot create */
2638 DPRINT1("Invalid mailslot create\n");
2639 return STATUS_INVALID_PARAMETER
;
2644 /* Allocate the open packet */
2645 OpenPacket
= ExAllocatePoolWithTag(NonPagedPool
, sizeof(*OpenPacket
), 'pOoI');
2646 if (!OpenPacket
) return STATUS_INSUFFICIENT_RESOURCES
;
2647 RtlZeroMemory(OpenPacket
, sizeof(*OpenPacket
));
2649 /* Check if the call came from user mode */
2650 if (AccessMode
!= KernelMode
)
2654 /* Probe the output parameters */
2655 ProbeForWriteHandle(FileHandle
);
2656 ProbeForWriteIoStatusBlock(IoStatusBlock
);
2658 /* Probe the allocation size if one was passed in */
2661 SafeAllocationSize
= ProbeForReadLargeInteger(AllocationSize
);
2665 SafeAllocationSize
.QuadPart
= 0;
2668 /* Make sure it's valid */
2669 if (SafeAllocationSize
.QuadPart
< 0)
2671 RtlRaiseStatus(STATUS_INVALID_PARAMETER
);
2674 /* Check if EA was passed in */
2675 if ((EaBuffer
) && (EaLength
))
2678 ProbeForRead(EaBuffer
, EaLength
, sizeof(ULONG
));
2680 /* And marshall it */
2681 OpenPacket
->EaBuffer
= ExAllocatePoolWithTag(NonPagedPool
,
2684 OpenPacket
->EaLength
= EaLength
;
2685 RtlCopyMemory(OpenPacket
->EaBuffer
, EaBuffer
, EaLength
);
2687 /* Validate the buffer */
2688 Status
= IoCheckEaBufferValidity(OpenPacket
->EaBuffer
,
2691 if (!NT_SUCCESS(Status
))
2693 /* Undo everything if it's invalid */
2694 DPRINT1("Invalid EA buffer\n");
2695 IoStatusBlock
->Status
= Status
;
2696 IoStatusBlock
->Information
= EaErrorOffset
;
2697 RtlRaiseStatus(Status
);
2701 _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER
)
2703 /* Return the exception code */
2704 if (OpenPacket
->EaBuffer
!= NULL
) ExFreePool(OpenPacket
->EaBuffer
);
2705 ExFreePool(OpenPacket
);
2706 _SEH2_YIELD(return _SEH2_GetExceptionCode());
2712 /* Check if this is a device attach */
2713 if (CreateOptions
& IO_ATTACH_DEVICE_API
)
2715 /* Set the flag properly */
2716 Options
|= IO_ATTACH_DEVICE
;
2717 CreateOptions
&= ~IO_ATTACH_DEVICE_API
;
2720 /* Check if we have allocation size */
2724 SafeAllocationSize
= *AllocationSize
;
2728 /* Otherwise, no size */
2729 SafeAllocationSize
.QuadPart
= 0;
2732 /* Check if we have an EA packet */
2733 if ((EaBuffer
) && (EaLength
))
2735 /* Allocate the kernel copy */
2736 OpenPacket
->EaBuffer
= ExAllocatePoolWithTag(NonPagedPool
,
2739 if (!OpenPacket
->EaBuffer
)
2741 ExFreePool(OpenPacket
);
2742 DPRINT1("Failed to allocate open packet EA buffer\n");
2743 return STATUS_INSUFFICIENT_RESOURCES
;
2747 OpenPacket
->EaLength
= EaLength
;
2748 RtlCopyMemory(OpenPacket
->EaBuffer
, EaBuffer
, EaLength
);
2750 /* Validate the buffer */
2751 Status
= IoCheckEaBufferValidity(OpenPacket
->EaBuffer
,
2754 if (!NT_SUCCESS(Status
))
2756 /* Undo everything if it's invalid */
2757 DPRINT1("Invalid EA buffer\n");
2758 ExFreePool(OpenPacket
->EaBuffer
);
2759 IoStatusBlock
->Status
= Status
;
2760 IoStatusBlock
->Information
= EaErrorOffset
;
2761 ExFreePool(OpenPacket
);
2767 /* Setup the Open Packet */
2768 OpenPacket
->Type
= IO_TYPE_OPEN_PACKET
;
2769 OpenPacket
->Size
= sizeof(*OpenPacket
);
2770 OpenPacket
->AllocationSize
= SafeAllocationSize
;
2771 OpenPacket
->CreateOptions
= CreateOptions
;
2772 OpenPacket
->FileAttributes
= (USHORT
)FileAttributes
;
2773 OpenPacket
->ShareAccess
= (USHORT
)ShareAccess
;
2774 OpenPacket
->Options
= Options
;
2775 OpenPacket
->Disposition
= Disposition
;
2776 OpenPacket
->CreateFileType
= CreateFileType
;
2777 OpenPacket
->ExtraCreateParameters
= ExtraCreateParameters
;
2778 OpenPacket
->InternalFlags
= Flags
;
2779 OpenPacket
->TopDeviceObjectHint
= DeviceObject
;
2781 /* Update the operation count */
2782 IopUpdateOperationCount(IopOtherTransfer
);
2785 * Attempt opening the file. This will call the I/O Parse Routine for
2786 * the File Object (IopParseDevice) which will create the object and
2787 * send the IRP to its device object. Note that we have two statuses
2788 * to worry about: the Object Manager's status (in Status) and the I/O
2789 * status, which is in the Open Packet's Final Status, and determined
2790 * by the Parse Check member.
2792 Status
= ObOpenObjectByName(ObjectAttributes
,
2800 /* Free the EA Buffer */
2801 if (OpenPacket
->EaBuffer
) ExFreePool(OpenPacket
->EaBuffer
);
2803 /* Now check for Ob or Io failure */
2804 if (!(NT_SUCCESS(Status
)) || (OpenPacket
->ParseCheck
== FALSE
))
2806 /* Check if Ob thinks well went well */
2807 if (NT_SUCCESS(Status
))
2810 * Tell it otherwise. Because we didn't use an ObjectType,
2811 * it incorrectly returned us a handle to God knows what.
2813 ZwClose(LocalHandle
);
2814 Status
= STATUS_OBJECT_TYPE_MISMATCH
;
2817 /* Now check the Io status */
2818 if (!NT_SUCCESS(OpenPacket
->FinalStatus
))
2820 /* Use this status instead of Ob's */
2821 Status
= OpenPacket
->FinalStatus
;
2823 /* Check if it was only a warning */
2824 if (NT_WARNING(Status
))
2826 /* Protect write with SEH */
2829 /* In this case, we copy the I/O Status back */
2830 IoStatusBlock
->Information
= OpenPacket
->Information
;
2831 IoStatusBlock
->Status
= OpenPacket
->FinalStatus
;
2833 _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER
)
2835 /* Get exception code */
2836 Status
= _SEH2_GetExceptionCode();
2841 else if ((OpenPacket
->FileObject
) && (OpenPacket
->ParseCheck
== FALSE
))
2844 * This can happen in the very bizarre case where the parse routine
2845 * actually executed more then once (due to a reparse) and ended
2846 * up failing after already having created the File Object.
2848 if (OpenPacket
->FileObject
->FileName
.Length
)
2850 /* It had a name, free it */
2851 ExFreePoolWithTag(OpenPacket
->FileObject
->FileName
.Buffer
, TAG_IO_NAME
);
2854 /* Clear the device object to invalidate the FO, and dereference */
2855 OpenPacket
->FileObject
->DeviceObject
= NULL
;
2856 ObDereferenceObject(OpenPacket
->FileObject
);
2861 /* We reached success and have a valid file handle */
2862 OpenPacket
->FileObject
->Flags
|= FO_HANDLE_CREATED
;
2863 ASSERT(OpenPacket
->FileObject
->Type
== IO_TYPE_FILE
);
2865 /* Enter SEH for write back */
2868 /* Write back the handle and I/O Status */
2869 *FileHandle
= LocalHandle
;
2870 IoStatusBlock
->Information
= OpenPacket
->Information
;
2871 IoStatusBlock
->Status
= OpenPacket
->FinalStatus
;
2873 /* Get the Io status */
2874 Status
= OpenPacket
->FinalStatus
;
2876 _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER
)
2878 /* Get the exception status */
2879 Status
= _SEH2_GetExceptionCode();
2884 /* Check if we were 100% successful */
2885 if ((OpenPacket
->ParseCheck
!= FALSE
) && (OpenPacket
->FileObject
))
2887 /* Dereference the File Object */
2888 ObDereferenceObject(OpenPacket
->FileObject
);
2892 ExFreePool(OpenPacket
);
2896 /* FUNCTIONS *****************************************************************/
2903 IoCheckQuerySetFileInformation(IN FILE_INFORMATION_CLASS FileInformationClass
,
2905 IN BOOLEAN SetOperation
)
2908 return STATUS_NOT_IMPLEMENTED
;
2916 IoCheckQuotaBufferValidity(IN PFILE_QUOTA_INFORMATION QuotaBuffer
,
2917 IN ULONG QuotaLength
,
2918 OUT PULONG ErrorOffset
)
2921 return STATUS_NOT_IMPLEMENTED
;
2929 IoCreateFile(OUT PHANDLE FileHandle
,
2930 IN ACCESS_MASK DesiredAccess
,
2931 IN POBJECT_ATTRIBUTES ObjectAttributes
,
2932 OUT PIO_STATUS_BLOCK IoStatusBlock
,
2933 IN PLARGE_INTEGER AllocationSize OPTIONAL
,
2934 IN ULONG FileAttributes
,
2935 IN ULONG ShareAccess
,
2936 IN ULONG Disposition
,
2937 IN ULONG CreateOptions
,
2938 IN PVOID EaBuffer OPTIONAL
,
2940 IN CREATE_FILE_TYPE CreateFileType
,
2941 IN PVOID ExtraCreateParameters OPTIONAL
,
2946 return IopCreateFile(FileHandle
,
2958 ExtraCreateParameters
,
2969 IoCreateFileSpecifyDeviceObjectHint(OUT PHANDLE FileHandle
,
2970 IN ACCESS_MASK DesiredAccess
,
2971 IN POBJECT_ATTRIBUTES ObjectAttributes
,
2972 OUT PIO_STATUS_BLOCK IoStatusBlock
,
2973 IN PLARGE_INTEGER AllocationSize OPTIONAL
,
2974 IN ULONG FileAttributes
,
2975 IN ULONG ShareAccess
,
2976 IN ULONG Disposition
,
2977 IN ULONG CreateOptions
,
2978 IN PVOID EaBuffer OPTIONAL
,
2980 IN CREATE_FILE_TYPE CreateFileType
,
2981 IN PVOID ExtraCreateParameters OPTIONAL
,
2983 IN PVOID DeviceObject
)
2989 /* Check if we were passed a device to send the create request to*/
2992 /* We'll tag this request into a file object extension */
2993 Flags
= (IOP_CREATE_FILE_OBJECT_EXTENSION
| IOP_USE_TOP_LEVEL_DEVICE_HINT
);
2996 return IopCreateFile(FileHandle
,
3008 ExtraCreateParameters
,
3009 Options
| IO_NO_PARAMETER_CHECKING
,
3019 IoCreateStreamFileObjectEx(IN PFILE_OBJECT FileObject OPTIONAL
,
3020 IN PDEVICE_OBJECT DeviceObject OPTIONAL
,
3021 OUT PHANDLE FileObjectHandle OPTIONAL
)
3023 PFILE_OBJECT CreatedFileObject
;
3026 OBJECT_ATTRIBUTES ObjectAttributes
;
3028 IOTRACE(IO_FILE_DEBUG
, "FileObject: %p\n", FileObject
);
3030 /* Choose Device Object */
3031 if (FileObject
) DeviceObject
= FileObject
->DeviceObject
;
3033 /* Reference the device object and initialize attributes */
3034 InterlockedIncrement(&DeviceObject
->ReferenceCount
);
3035 InitializeObjectAttributes(&ObjectAttributes
, NULL
, 0, NULL
, NULL
);
3037 /* Create the File Object */
3038 Status
= ObCreateObject(KernelMode
,
3043 sizeof(FILE_OBJECT
),
3044 sizeof(FILE_OBJECT
),
3046 (PVOID
*)&CreatedFileObject
);
3047 if (!NT_SUCCESS(Status
))
3050 IopDereferenceDeviceObject(DeviceObject
, FALSE
);
3051 ExRaiseStatus(Status
);
3054 /* Set File Object Data */
3055 RtlZeroMemory(CreatedFileObject
, sizeof(FILE_OBJECT
));
3056 CreatedFileObject
->DeviceObject
= DeviceObject
;
3057 CreatedFileObject
->Type
= IO_TYPE_FILE
;
3058 CreatedFileObject
->Size
= sizeof(FILE_OBJECT
);
3059 CreatedFileObject
->Flags
= FO_STREAM_FILE
;
3061 /* Initialize the wait event */
3062 KeInitializeEvent(&CreatedFileObject
->Event
, SynchronizationEvent
, FALSE
);
3064 /* Insert it to create a handle for it */
3065 Status
= ObInsertObject(CreatedFileObject
,
3069 (PVOID
*)&CreatedFileObject
,
3071 if (!NT_SUCCESS(Status
)) ExRaiseStatus(Status
);
3073 /* Set the handle created flag */
3074 CreatedFileObject
->Flags
|= FO_HANDLE_CREATED
;
3075 ASSERT(CreatedFileObject
->Type
== IO_TYPE_FILE
);
3077 /* Check if we have a VPB */
3078 if (DeviceObject
->Vpb
)
3081 InterlockedIncrement((PLONG
)&DeviceObject
->Vpb
->ReferenceCount
);
3084 /* Check if the caller wants the handle */
3085 if (FileObjectHandle
)
3088 *FileObjectHandle
= FileHandle
;
3089 ObDereferenceObject(CreatedFileObject
);
3093 /* Otherwise, close it */
3094 ObCloseHandle(FileHandle
, KernelMode
);
3097 /* Return the file object */
3098 return CreatedFileObject
;
3106 IoCreateStreamFileObject(IN PFILE_OBJECT FileObject
,
3107 IN PDEVICE_OBJECT DeviceObject
)
3109 /* Call the newer function */
3110 return IoCreateStreamFileObjectEx(FileObject
, DeviceObject
, NULL
);
3118 IoCreateStreamFileObjectLite(IN PFILE_OBJECT FileObject OPTIONAL
,
3119 IN PDEVICE_OBJECT DeviceObject OPTIONAL
)
3121 PFILE_OBJECT CreatedFileObject
;
3123 OBJECT_ATTRIBUTES ObjectAttributes
;
3125 IOTRACE(IO_FILE_DEBUG
, "FileObject: %p\n", FileObject
);
3127 /* Choose Device Object */
3128 if (FileObject
) DeviceObject
= FileObject
->DeviceObject
;
3130 /* Reference the device object and initialize attributes */
3131 InterlockedIncrement(&DeviceObject
->ReferenceCount
);
3132 InitializeObjectAttributes(&ObjectAttributes
, NULL
, 0, NULL
, NULL
);
3134 /* Create the File Object */
3135 Status
= ObCreateObject(KernelMode
,
3140 sizeof(FILE_OBJECT
),
3141 sizeof(FILE_OBJECT
),
3143 (PVOID
*)&CreatedFileObject
);
3144 if (!NT_SUCCESS(Status
))
3147 IopDereferenceDeviceObject(DeviceObject
, FALSE
);
3148 ExRaiseStatus(Status
);
3151 /* Set File Object Data */
3152 RtlZeroMemory(CreatedFileObject
, sizeof(FILE_OBJECT
));
3153 CreatedFileObject
->DeviceObject
= DeviceObject
;
3154 CreatedFileObject
->Type
= IO_TYPE_FILE
;
3155 CreatedFileObject
->Size
= sizeof(FILE_OBJECT
);
3156 CreatedFileObject
->Flags
= FO_STREAM_FILE
;
3158 /* Initialize the wait event */
3159 KeInitializeEvent(&CreatedFileObject
->Event
, SynchronizationEvent
, FALSE
);
3161 /* Destroy create information */
3162 ObFreeObjectCreateInfoBuffer(OBJECT_TO_OBJECT_HEADER(CreatedFileObject
)->
3164 OBJECT_TO_OBJECT_HEADER(CreatedFileObject
)->ObjectCreateInfo
= NULL
;
3166 /* Set the handle created flag */
3167 CreatedFileObject
->Flags
|= FO_HANDLE_CREATED
;
3168 ASSERT(CreatedFileObject
->Type
== IO_TYPE_FILE
);
3170 /* Check if we have a VPB */
3171 if (DeviceObject
->Vpb
)
3174 InterlockedIncrement((PLONG
)&DeviceObject
->Vpb
->ReferenceCount
);
3177 /* Return the file object */
3178 return CreatedFileObject
;
3186 IoGetFileObjectGenericMapping(VOID
)
3188 /* Return the mapping */
3189 return &IopFileMapping
;
3197 IoIsFileOriginRemote(IN PFILE_OBJECT FileObject
)
3199 /* Return the flag status */
3200 return FileObject
->Flags
& FO_REMOTE_ORIGIN
? TRUE
: FALSE
;
3208 IoFastQueryNetworkAttributes(IN POBJECT_ATTRIBUTES ObjectAttributes
,
3209 IN ACCESS_MASK DesiredAccess
,
3210 IN ULONG OpenOptions
,
3211 OUT PIO_STATUS_BLOCK IoStatus
,
3212 OUT PFILE_NETWORK_OPEN_INFORMATION Buffer
)
3215 DUMMY_FILE_OBJECT LocalFileObject
;
3217 OPEN_PACKET OpenPacket
;
3219 IOTRACE(IO_FILE_DEBUG
, "FileName: %wZ\n", ObjectAttributes
->ObjectName
);
3221 /* Setup the Open Packet */
3222 RtlZeroMemory(&OpenPacket
, sizeof(OPEN_PACKET
));
3223 OpenPacket
.Type
= IO_TYPE_OPEN_PACKET
;
3224 OpenPacket
.Size
= sizeof(OPEN_PACKET
);
3225 OpenPacket
.CreateOptions
= OpenOptions
| FILE_OPEN_REPARSE_POINT
;
3226 OpenPacket
.ShareAccess
= FILE_SHARE_READ
| FILE_SHARE_WRITE
| FILE_SHARE_DELETE
;
3227 OpenPacket
.Options
= IO_FORCE_ACCESS_CHECK
;
3228 OpenPacket
.Disposition
= FILE_OPEN
;
3229 OpenPacket
.NetworkInformation
= Buffer
;
3230 OpenPacket
.QueryOnly
= TRUE
;
3231 OpenPacket
.FullAttributes
= TRUE
;
3232 OpenPacket
.LocalFileObject
= &LocalFileObject
;
3235 * Attempt opening the file. This will call the I/O Parse Routine for
3236 * the File Object (IopParseDevice) which will use the dummy file obejct
3237 * send the IRP to its device object. Note that we have two statuses
3238 * to worry about: the Object Manager's status (in Status) and the I/O
3239 * status, which is in the Open Packet's Final Status, and determined
3240 * by the Parse Check member.
3242 Status
= ObOpenObjectByName(ObjectAttributes
,
3249 if (OpenPacket
.ParseCheck
== FALSE
)
3252 IoStatus
->Status
= Status
;
3256 /* Use the Io status */
3257 IoStatus
->Status
= OpenPacket
.FinalStatus
;
3258 IoStatus
->Information
= OpenPacket
.Information
;
3261 /* Return success */
3270 IoUpdateShareAccess(IN PFILE_OBJECT FileObject
,
3271 OUT PSHARE_ACCESS ShareAccess
)
3275 /* Check if the file has an extension */
3276 if (FileObject
->Flags
& FO_FILE_OBJECT_HAS_EXTENSION
)
3278 /* Check if caller specified to ignore access checks */
3279 //if (FileObject->FoExtFlags & IO_IGNORE_SHARE_ACCESS_CHECK)
3281 /* Don't update share access */
3286 /* Otherwise, check if there's any access present */
3287 if ((FileObject
->ReadAccess
) ||
3288 (FileObject
->WriteAccess
) ||
3289 (FileObject
->DeleteAccess
))
3291 /* Increase the open count */
3292 ShareAccess
->OpenCount
++;
3294 /* Add new share access */
3295 ShareAccess
->Readers
+= FileObject
->ReadAccess
;
3296 ShareAccess
->Writers
+= FileObject
->WriteAccess
;
3297 ShareAccess
->Deleters
+= FileObject
->DeleteAccess
;
3298 ShareAccess
->SharedRead
+= FileObject
->SharedRead
;
3299 ShareAccess
->SharedWrite
+= FileObject
->SharedWrite
;
3300 ShareAccess
->SharedDelete
+= FileObject
->SharedDelete
;
3309 IoCheckShareAccess(IN ACCESS_MASK DesiredAccess
,
3310 IN ULONG DesiredShareAccess
,
3311 IN PFILE_OBJECT FileObject
,
3312 IN PSHARE_ACCESS ShareAccess
,
3316 BOOLEAN WriteAccess
;
3317 BOOLEAN DeleteAccess
;
3319 BOOLEAN SharedWrite
;
3320 BOOLEAN SharedDelete
;
3323 /* Get access masks */
3324 ReadAccess
= (DesiredAccess
& (FILE_READ_DATA
| FILE_EXECUTE
)) != 0;
3325 WriteAccess
= (DesiredAccess
& (FILE_WRITE_DATA
| FILE_APPEND_DATA
)) != 0;
3326 DeleteAccess
= (DesiredAccess
& DELETE
) != 0;
3328 /* Set them in the file object */
3329 FileObject
->ReadAccess
= ReadAccess
;
3330 FileObject
->WriteAccess
= WriteAccess
;
3331 FileObject
->DeleteAccess
= DeleteAccess
;
3333 /* Check if the file has an extension */
3334 if (FileObject
->Flags
& FO_FILE_OBJECT_HAS_EXTENSION
)
3336 /* Check if caller specified to ignore access checks */
3337 //if (FileObject->FoExtFlags & IO_IGNORE_SHARE_ACCESS_CHECK)
3339 /* Don't check share access */
3340 return STATUS_SUCCESS
;
3344 /* Check if we have any access */
3345 if ((ReadAccess
) || (WriteAccess
) || (DeleteAccess
))
3347 /* Get shared access masks */
3348 SharedRead
= (DesiredShareAccess
& FILE_SHARE_READ
) != 0;
3349 SharedWrite
= (DesiredShareAccess
& FILE_SHARE_WRITE
) != 0;
3350 SharedDelete
= (DesiredShareAccess
& FILE_SHARE_DELETE
) != 0;
3353 FileObject
->SharedRead
= SharedRead
;
3354 FileObject
->SharedWrite
= SharedWrite
;
3355 FileObject
->SharedDelete
= SharedDelete
;
3357 /* Check if the shared access is violated */
3359 (ShareAccess
->SharedRead
< ShareAccess
->OpenCount
)) ||
3361 (ShareAccess
->SharedWrite
< ShareAccess
->OpenCount
)) ||
3363 (ShareAccess
->SharedDelete
< ShareAccess
->OpenCount
)) ||
3364 ((ShareAccess
->Readers
!= 0) && !SharedRead
) ||
3365 ((ShareAccess
->Writers
!= 0) && !SharedWrite
) ||
3366 ((ShareAccess
->Deleters
!= 0) && !SharedDelete
))
3368 /* Sharing violation, fail */
3369 return STATUS_SHARING_VIOLATION
;
3372 /* It's not, check if caller wants us to update it */
3375 /* Increase open count */
3376 ShareAccess
->OpenCount
++;
3378 /* Update shared access */
3379 ShareAccess
->Readers
+= ReadAccess
;
3380 ShareAccess
->Writers
+= WriteAccess
;
3381 ShareAccess
->Deleters
+= DeleteAccess
;
3382 ShareAccess
->SharedRead
+= SharedRead
;
3383 ShareAccess
->SharedWrite
+= SharedWrite
;
3384 ShareAccess
->SharedDelete
+= SharedDelete
;
3388 /* Validation successful */
3389 return STATUS_SUCCESS
;
3397 IoRemoveShareAccess(IN PFILE_OBJECT FileObject
,
3398 IN PSHARE_ACCESS ShareAccess
)
3402 /* Check if the file has an extension */
3403 if (FileObject
->Flags
& FO_FILE_OBJECT_HAS_EXTENSION
)
3405 /* Check if caller specified to ignore access checks */
3406 //if (FileObject->FoExtFlags & IO_IGNORE_SHARE_ACCESS_CHECK)
3408 /* Don't update share access */
3413 /* Otherwise, check if there's any access present */
3414 if ((FileObject
->ReadAccess
) ||
3415 (FileObject
->WriteAccess
) ||
3416 (FileObject
->DeleteAccess
))
3418 /* Decrement the open count */
3419 ShareAccess
->OpenCount
--;
3421 /* Remove share access */
3422 ShareAccess
->Readers
-= FileObject
->ReadAccess
;
3423 ShareAccess
->Writers
-= FileObject
->WriteAccess
;
3424 ShareAccess
->Deleters
-= FileObject
->DeleteAccess
;
3425 ShareAccess
->SharedRead
-= FileObject
->SharedRead
;
3426 ShareAccess
->SharedWrite
-= FileObject
->SharedWrite
;
3427 ShareAccess
->SharedDelete
-= FileObject
->SharedDelete
;
3436 IoSetShareAccess(IN ACCESS_MASK DesiredAccess
,
3437 IN ULONG DesiredShareAccess
,
3438 IN PFILE_OBJECT FileObject
,
3439 OUT PSHARE_ACCESS ShareAccess
)
3442 BOOLEAN WriteAccess
;
3443 BOOLEAN DeleteAccess
;
3445 BOOLEAN SharedWrite
;
3446 BOOLEAN SharedDelete
;
3447 BOOLEAN Update
= TRUE
;
3450 ReadAccess
= (DesiredAccess
& (FILE_READ_DATA
| FILE_EXECUTE
)) != 0;
3451 WriteAccess
= (DesiredAccess
& (FILE_WRITE_DATA
| FILE_APPEND_DATA
)) != 0;
3452 DeleteAccess
= (DesiredAccess
& DELETE
) != 0;
3454 /* Check if the file has an extension */
3455 if (FileObject
->Flags
& FO_FILE_OBJECT_HAS_EXTENSION
)
3457 /* Check if caller specified to ignore access checks */
3458 //if (FileObject->FoExtFlags & IO_IGNORE_SHARE_ACCESS_CHECK)
3460 /* Don't update share access */
3465 /* Update basic access */
3466 FileObject
->ReadAccess
= ReadAccess
;
3467 FileObject
->WriteAccess
= WriteAccess
;
3468 FileObject
->DeleteAccess
= DeleteAccess
;
3470 /* Check if we have no access as all */
3471 if (!(ReadAccess
) && !(WriteAccess
) && !(DeleteAccess
))
3473 /* Check if we need to update the structure */
3474 if (!Update
) return;
3476 /* Otherwise, clear data */
3477 ShareAccess
->OpenCount
= 0;
3478 ShareAccess
->Readers
= 0;
3479 ShareAccess
->Writers
= 0;
3480 ShareAccess
->Deleters
= 0;
3481 ShareAccess
->SharedRead
= 0;
3482 ShareAccess
->SharedWrite
= 0;
3483 ShareAccess
->SharedDelete
= 0;
3487 /* Calculate shared access */
3488 SharedRead
= (DesiredShareAccess
& FILE_SHARE_READ
) != 0;
3489 SharedWrite
= (DesiredShareAccess
& FILE_SHARE_WRITE
) != 0;
3490 SharedDelete
= (DesiredShareAccess
& FILE_SHARE_DELETE
) != 0;
3492 /* Set it in the FO */
3493 FileObject
->SharedRead
= SharedRead
;
3494 FileObject
->SharedWrite
= SharedWrite
;
3495 FileObject
->SharedDelete
= SharedDelete
;
3497 /* Check if we need to update the structure */
3498 if (!Update
) return;
3500 /* Otherwise, set data */
3501 ShareAccess
->OpenCount
= 1;
3502 ShareAccess
->Readers
= ReadAccess
;
3503 ShareAccess
->Writers
= WriteAccess
;
3504 ShareAccess
->Deleters
= DeleteAccess
;
3505 ShareAccess
->SharedRead
= SharedRead
;
3506 ShareAccess
->SharedWrite
= SharedWrite
;
3507 ShareAccess
->SharedDelete
= SharedDelete
;
3516 IoCancelFileOpen(IN PDEVICE_OBJECT DeviceObject
,
3517 IN PFILE_OBJECT FileObject
)
3523 PIO_STACK_LOCATION Stack
;
3525 /* Check if handles were already created for the
3526 * open file. If so, that's over.
3528 if (FileObject
->Flags
& FO_HANDLE_CREATED
)
3529 KeBugCheckEx(INVALID_CANCEL_OF_FILE_OPEN
,
3530 (ULONG_PTR
)FileObject
,
3531 (ULONG_PTR
)DeviceObject
, 0, 0);
3533 /* Reset the events */
3534 KeInitializeEvent(&Event
, SynchronizationEvent
, FALSE
);
3535 KeClearEvent(&FileObject
->Event
);
3537 /* Allocate the IRP we'll use */
3538 Irp
= IopAllocateIrpMustSucceed(DeviceObject
->StackSize
);
3539 /* Properly set it */
3540 Irp
->Tail
.Overlay
.Thread
= PsGetCurrentThread();
3541 Irp
->UserEvent
= &Event
;
3542 Irp
->UserIosb
= &Irp
->IoStatus
;
3543 Irp
->Overlay
.AsynchronousParameters
.UserApcRoutine
= NULL
;
3544 Irp
->Tail
.Overlay
.OriginalFileObject
= FileObject
;
3545 Irp
->RequestorMode
= KernelMode
;
3546 Irp
->Flags
= IRP_CLOSE_OPERATION
| IRP_SYNCHRONOUS_API
;
3548 Stack
= IoGetNextIrpStackLocation(Irp
);
3549 Stack
->MajorFunction
= IRP_MJ_CLEANUP
;
3550 Stack
->FileObject
= FileObject
;
3552 /* Put on top of IRPs list of the thread */
3553 IopQueueIrpToThread(Irp
);
3555 /* Call the driver */
3556 Status
= IoCallDriver(DeviceObject
, Irp
);
3557 if (Status
== STATUS_PENDING
)
3559 KeWaitForSingleObject(&Event
, UserRequest
,
3560 KernelMode
, FALSE
, NULL
);
3563 /* Remove from IRPs list */
3564 KeRaiseIrql(APC_LEVEL
, &OldIrql
);
3565 IopUnQueueIrpFromThread(Irp
);
3566 KeLowerIrql(OldIrql
);
3571 /* Clear the event */
3572 KeClearEvent(&FileObject
->Event
);
3573 /* And finally, mark the open operation as canceled */
3574 FileObject
->Flags
|= FO_FILE_OPEN_CANCELLED
;
3582 IoQueryFileDosDeviceName(IN PFILE_OBJECT FileObject
,
3583 OUT POBJECT_NAME_INFORMATION
*ObjectNameInformation
)
3586 ULONG Length
, ReturnLength
;
3587 POBJECT_NAME_INFORMATION LocalInfo
;
3589 /* Start with a buffer length of 200 */
3592 * We'll loop until query works.
3593 * We will use returned length for next loop
3594 * iteration, trying to have a big enough buffer.
3596 for (Length
= 200; ; Length
= ReturnLength
)
3598 /* Allocate our work buffer */
3599 LocalInfo
= ExAllocatePoolWithTag(PagedPool
, Length
, 'nDoI');
3600 if (LocalInfo
== NULL
)
3602 return STATUS_INSUFFICIENT_RESOURCES
;
3605 /* Query the DOS name */
3606 Status
= IopQueryNameInternal(FileObject
,
3613 /* If it succeed, nothing more to do */
3614 if (Status
== STATUS_SUCCESS
)
3619 /* Otherwise, prepare for re-allocation */
3620 ExFreePoolWithTag(LocalInfo
, 'nDoI');
3623 * If we failed because of something else
3624 * than memory, simply stop and fail here
3626 if (Status
!= STATUS_BUFFER_OVERFLOW
)
3632 /* Success case here: return our buffer */
3633 *ObjectNameInformation
= LocalInfo
;
3634 return STATUS_SUCCESS
;
3642 IoSetFileOrigin(IN PFILE_OBJECT FileObject
,
3645 NTSTATUS Status
= STATUS_SUCCESS
;
3648 /* Get the flag status */
3649 FlagSet
= FileObject
->Flags
& FO_REMOTE_ORIGIN
? TRUE
: FALSE
;
3651 /* Don't set the flag if it was set already, and don't remove it if it wasn't set */
3652 if (Remote
&& !FlagSet
)
3655 FileObject
->Flags
|= FO_REMOTE_ORIGIN
;
3657 else if (!Remote
&& FlagSet
)
3659 /* Remove the flag */
3660 FileObject
->Flags
&= ~FO_REMOTE_ORIGIN
;
3665 Status
= STATUS_INVALID_PARAMETER_MIX
;
3677 NtCreateFile(PHANDLE FileHandle
,
3678 ACCESS_MASK DesiredAccess
,
3679 POBJECT_ATTRIBUTES ObjectAttributes
,
3680 PIO_STATUS_BLOCK IoStatusBlock
,
3681 PLARGE_INTEGER AllocateSize
,
3682 ULONG FileAttributes
,
3684 ULONG CreateDisposition
,
3685 ULONG CreateOptions
,
3689 /* Call the I/O Function */
3690 return IoCreateFile(FileHandle
,
3708 NtCreateMailslotFile(OUT PHANDLE FileHandle
,
3709 IN ACCESS_MASK DesiredAccess
,
3710 IN POBJECT_ATTRIBUTES ObjectAttributes
,
3711 OUT PIO_STATUS_BLOCK IoStatusBlock
,
3712 IN ULONG CreateOptions
,
3713 IN ULONG MailslotQuota
,
3714 IN ULONG MaxMessageSize
,
3715 IN PLARGE_INTEGER TimeOut
)
3717 MAILSLOT_CREATE_PARAMETERS Buffer
;
3720 /* Check for Timeout */
3723 /* check if the call came from user mode */
3724 if (KeGetPreviousMode() != KernelMode
)
3726 /* Enter SEH for Probe */
3729 /* Probe the timeout */
3730 Buffer
.ReadTimeout
= ProbeForReadLargeInteger(TimeOut
);
3732 _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER
)
3734 /* Return the exception code */
3735 _SEH2_YIELD(return _SEH2_GetExceptionCode());
3741 /* Otherwise, capture directly */
3742 Buffer
.ReadTimeout
= *TimeOut
;
3745 /* Set the correct setting */
3746 Buffer
.TimeoutSpecified
= TRUE
;
3750 /* Tell the FSD we don't have a timeout */
3751 Buffer
.TimeoutSpecified
= FALSE
;
3755 Buffer
.MailslotQuota
= MailslotQuota
;
3756 Buffer
.MaximumMessageSize
= MaxMessageSize
;
3759 return IoCreateFile(FileHandle
,
3765 FILE_SHARE_READ
| FILE_SHARE_WRITE
,
3770 CreateFileTypeMailslot
,
3777 NtCreateNamedPipeFile(OUT PHANDLE FileHandle
,
3778 IN ACCESS_MASK DesiredAccess
,
3779 IN POBJECT_ATTRIBUTES ObjectAttributes
,
3780 OUT PIO_STATUS_BLOCK IoStatusBlock
,
3781 IN ULONG ShareAccess
,
3782 IN ULONG CreateDisposition
,
3783 IN ULONG CreateOptions
,
3784 IN ULONG NamedPipeType
,
3786 IN ULONG CompletionMode
,
3787 IN ULONG MaximumInstances
,
3788 IN ULONG InboundQuota
,
3789 IN ULONG OutboundQuota
,
3790 IN PLARGE_INTEGER DefaultTimeout
)
3792 NAMED_PIPE_CREATE_PARAMETERS Buffer
;
3795 /* Check for Timeout */
3798 /* check if the call came from user mode */
3799 if (KeGetPreviousMode() != KernelMode
)
3801 /* Enter SEH for Probe */
3804 /* Probe the timeout */
3805 Buffer
.DefaultTimeout
=
3806 ProbeForReadLargeInteger(DefaultTimeout
);
3808 _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER
)
3810 /* Return the exception code */
3811 _SEH2_YIELD(return _SEH2_GetExceptionCode());
3817 /* Otherwise, capture directly */
3818 Buffer
.DefaultTimeout
= *DefaultTimeout
;
3821 /* Set the correct setting */
3822 Buffer
.TimeoutSpecified
= TRUE
;
3826 /* Tell the FSD we don't have a timeout */
3827 Buffer
.TimeoutSpecified
= FALSE
;
3831 Buffer
.NamedPipeType
= NamedPipeType
;
3832 Buffer
.ReadMode
= ReadMode
;
3833 Buffer
.CompletionMode
= CompletionMode
;
3834 Buffer
.MaximumInstances
= MaximumInstances
;
3835 Buffer
.InboundQuota
= InboundQuota
;
3836 Buffer
.OutboundQuota
= OutboundQuota
;
3839 return IoCreateFile(FileHandle
,
3850 CreateFileTypeNamedPipe
,
3857 NtFlushWriteBuffer(VOID
)
3861 /* Call the kernel */
3862 KeFlushWriteBuffer();
3863 return STATUS_SUCCESS
;
3871 NtOpenFile(OUT PHANDLE FileHandle
,
3872 IN ACCESS_MASK DesiredAccess
,
3873 IN POBJECT_ATTRIBUTES ObjectAttributes
,
3874 OUT PIO_STATUS_BLOCK IoStatusBlock
,
3875 IN ULONG ShareAccess
,
3876 IN ULONG OpenOptions
)
3878 /* Call the I/O Function */
3879 return IoCreateFile(FileHandle
,
3897 NtQueryAttributesFile(IN POBJECT_ATTRIBUTES ObjectAttributes
,
3898 OUT PFILE_BASIC_INFORMATION FileInformation
)
3900 /* Call the internal helper API */
3901 return IopQueryAttributesFile(ObjectAttributes
,
3902 FileBasicInformation
,
3903 sizeof(FILE_BASIC_INFORMATION
),
3909 NtQueryFullAttributesFile(IN POBJECT_ATTRIBUTES ObjectAttributes
,
3910 OUT PFILE_NETWORK_OPEN_INFORMATION FileInformation
)
3912 /* Call the internal helper API */
3913 return IopQueryAttributesFile(ObjectAttributes
,
3914 FileNetworkOpenInformation
,
3915 sizeof(FILE_NETWORK_OPEN_INFORMATION
),
3920 * @name NtCancelIoFile
3922 * Cancel all pending I/O operations in the current thread for specified
3926 * Handle to file object to cancel requests for. No specific
3927 * access rights are needed.
3928 * @param IoStatusBlock
3929 * Pointer to status block which is filled with final completition
3930 * status on successful return.
3938 NtCancelIoFile(IN HANDLE FileHandle
,
3939 OUT PIO_STATUS_BLOCK IoStatusBlock
)
3941 PFILE_OBJECT FileObject
;
3945 BOOLEAN OurIrpsInList
= FALSE
;
3946 LARGE_INTEGER Interval
;
3947 KPROCESSOR_MODE PreviousMode
= KeGetPreviousMode();
3949 PLIST_ENTRY ListHead
, NextEntry
;
3951 IOTRACE(IO_API_DEBUG
, "FileHandle: %p\n", FileHandle
);
3953 /* Check the previous mode */
3954 if (PreviousMode
!= KernelMode
)
3956 /* Enter SEH for probing */
3959 /* Probe the I/O Status Block */
3960 ProbeForWriteIoStatusBlock(IoStatusBlock
);
3962 _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER
)
3964 /* Return the exception code */
3965 _SEH2_YIELD(return _SEH2_GetExceptionCode());
3970 /* Reference the file object */
3971 Status
= ObReferenceObjectByHandle(FileHandle
,
3975 (PVOID
*)&FileObject
,
3977 if (!NT_SUCCESS(Status
)) return Status
;
3979 /* IRP cancellations are synchronized at APC_LEVEL. */
3980 KeRaiseIrql(APC_LEVEL
, &OldIrql
);
3982 /* Get the current thread */
3983 Thread
= PsGetCurrentThread();
3985 /* Update the operation counts */
3986 IopUpdateOperationCount(IopOtherTransfer
);
3989 ListHead
= &Thread
->IrpList
;
3990 NextEntry
= ListHead
->Flink
;
3991 while (ListHead
!= NextEntry
)
3993 /* Get the IRP and check if the File Object matches */
3994 Irp
= CONTAINING_RECORD(NextEntry
, IRP
, ThreadListEntry
);
3995 if (Irp
->Tail
.Overlay
.OriginalFileObject
== FileObject
)
3997 /* Cancel this IRP and keep looping */
3999 OurIrpsInList
= TRUE
;
4002 /* Go to the next entry */
4003 NextEntry
= NextEntry
->Flink
;
4006 /* Lower the IRQL */
4007 KeLowerIrql(OldIrql
);
4009 /* Check if we had found an IRP */
4012 /* Setup a 10ms wait */
4013 Interval
.QuadPart
= -100000;
4016 while (OurIrpsInList
)
4019 KeDelayExecutionThread(KernelMode
, FALSE
, &Interval
);
4020 OurIrpsInList
= FALSE
;
4023 KeRaiseIrql(APC_LEVEL
, &OldIrql
);
4025 /* Now loop the list again */
4026 NextEntry
= ListHead
->Flink
;
4027 while (NextEntry
!= ListHead
)
4029 /* Get the IRP and check if the File Object matches */
4030 Irp
= CONTAINING_RECORD(NextEntry
, IRP
, ThreadListEntry
);
4031 if (Irp
->Tail
.Overlay
.OriginalFileObject
== FileObject
)
4034 OurIrpsInList
= TRUE
;
4038 /* Go to the next entry */
4039 NextEntry
= NextEntry
->Flink
;
4042 /* Lower the IRQL */
4043 KeLowerIrql(OldIrql
);
4047 /* Enter SEH for writing back the I/O Status */
4051 IoStatusBlock
->Status
= STATUS_SUCCESS
;
4052 IoStatusBlock
->Information
= 0;
4054 _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER
)
4056 /* Ignore exception */
4060 /* Dereference the file object and return success */
4061 ObDereferenceObject(FileObject
);
4062 return STATUS_SUCCESS
;
4070 NtDeleteFile(IN POBJECT_ATTRIBUTES ObjectAttributes
)
4073 DUMMY_FILE_OBJECT LocalFileObject
;
4075 KPROCESSOR_MODE AccessMode
= KeGetPreviousMode();
4076 OPEN_PACKET OpenPacket
;
4078 IOTRACE(IO_API_DEBUG
, "FileMame: %wZ\n", ObjectAttributes
->ObjectName
);
4080 /* Setup the Open Packet */
4081 RtlZeroMemory(&OpenPacket
, sizeof(OPEN_PACKET
));
4082 OpenPacket
.Type
= IO_TYPE_OPEN_PACKET
;
4083 OpenPacket
.Size
= sizeof(OPEN_PACKET
);
4084 OpenPacket
.CreateOptions
= FILE_DELETE_ON_CLOSE
;
4085 OpenPacket
.ShareAccess
= FILE_SHARE_READ
|
4088 OpenPacket
.Disposition
= FILE_OPEN
;
4089 OpenPacket
.DeleteOnly
= TRUE
;
4090 OpenPacket
.LocalFileObject
= &LocalFileObject
;
4092 /* Update the operation counts */
4093 IopUpdateOperationCount(IopOtherTransfer
);
4096 * Attempt opening the file. This will call the I/O Parse Routine for
4097 * the File Object (IopParseDevice) which will use the dummy file obejct
4098 * send the IRP to its device object. Note that we have two statuses
4099 * to worry about: the Object Manager's status (in Status) and the I/O
4100 * status, which is in the Open Packet's Final Status, and determined
4101 * by the Parse Check member.
4103 Status
= ObOpenObjectByName(ObjectAttributes
,
4110 if (OpenPacket
.ParseCheck
== FALSE
) return Status
;
4112 /* Retrn the Io status */
4113 return OpenPacket
.FinalStatus
;