ReactOS 0.4.16-dev-1520-gb558596
create.c
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1/*++
2
3Copyright (c) 1989-2000 Microsoft Corporation
4
5Module Name:
6
7 Create.c
8
9Abstract:
10
11 This module implements the File Create routine for Fat called by the
12 dispatch driver.
13
14
15--*/
16
17#include "fatprocs.h"
18
19//
20// The Bug check file id for this module
21//
22
23#define BugCheckFileId (FAT_BUG_CHECK_CREATE)
24
25//
26// The debug trace level
27//
28
29#define Dbg (DEBUG_TRACE_CREATE)
30
31
32//
33// Macros for incrementing performance counters.
34//
35
36#define CollectCreateHitStatistics(VCB) { \
37 PFILE_SYSTEM_STATISTICS Stats = &(VCB)->Statistics[KeGetCurrentProcessorNumber() % FatData.NumberProcessors]; \
38 Stats->Fat.CreateHits += 1; \
39}
40
41#define CollectCreateStatistics(VCB,STATUS) { \
42 PFILE_SYSTEM_STATISTICS Stats = &(VCB)->Statistics[KeGetCurrentProcessorNumber() % FatData.NumberProcessors]; \
43 if ((STATUS) == STATUS_SUCCESS) { \
44 Stats->Fat.SuccessfulCreates += 1; \
45 } else { \
46 Stats->Fat.FailedCreates += 1; \
47 } \
48}
49
50LUID FatSecurityPrivilege = { SE_SECURITY_PRIVILEGE, 0 };
51
52//
53// local procedure prototypes
54//
55
56_Requires_lock_held_(_Global_critical_region_)
57IO_STATUS_BLOCK
58FatOpenVolume (
59 _In_ PIRP_CONTEXT IrpContext,
60 _Inout_ PFILE_OBJECT FileObject,
61 _Inout_ PVCB Vcb,
62 _In_ PACCESS_MASK DesiredAccess,
63 _In_ USHORT ShareAccess,
64 _In_ ULONG CreateDisposition
65 );
66
67_Requires_lock_held_(_Global_critical_region_)
68IO_STATUS_BLOCK
69FatOpenRootDcb (
70 _In_ PIRP_CONTEXT IrpContext,
71 _Inout_ PFILE_OBJECT FileObject,
72 _Inout_ PVCB Vcb,
73 _In_ PACCESS_MASK DesiredAccess,
74 _In_ USHORT ShareAccess,
75 _In_ ULONG CreateDisposition
76 );
77
78_Requires_lock_held_(_Global_critical_region_)
79IO_STATUS_BLOCK
80FatOpenExistingDcb (
81 _In_ PIRP_CONTEXT IrpContext,
82 _In_ PIO_STACK_LOCATION IrpSp,
83 _Inout_ PFILE_OBJECT FileObject,
84 _Inout_ PVCB Vcb,
85 _Inout_ PDCB Dcb,
86 _In_ PACCESS_MASK DesiredAccess,
87 _In_ USHORT ShareAccess,
88 _In_ ULONG CreateDisposition,
89 _In_ BOOLEAN NoEaKnowledge,
90 _In_ BOOLEAN DeleteOnClose,
91 _In_ BOOLEAN OpenRequiringOplock,
92 _In_ BOOLEAN FileNameOpenedDos,
93 _Out_ PBOOLEAN OplockPostIrp
94 );
95
96_Requires_lock_held_(_Global_critical_region_)
97IO_STATUS_BLOCK
98FatOpenExistingFcb (
99 _In_ PIRP_CONTEXT IrpContext,
100 _In_ PIO_STACK_LOCATION IrpSp,
101 _Inout_ PFILE_OBJECT FileObject,
102 _Inout_ PVCB Vcb,
103 _Inout_ PFCB Fcb,
104 _In_ PACCESS_MASK DesiredAccess,
105 _In_ USHORT ShareAccess,
106 _In_ ULONG AllocationSize,
107 _In_ PFILE_FULL_EA_INFORMATION EaBuffer,
108 _In_ ULONG EaLength,
109 _In_ USHORT FileAttributes,
110 _In_ ULONG CreateDisposition,
111 _In_ BOOLEAN NoEaKnowledge,
112 _In_ BOOLEAN DeleteOnClose,
113 _In_ BOOLEAN OpenRequiringOplock,
114 _In_ BOOLEAN FileNameOpenedDos,
115 _Out_ PBOOLEAN OplockPostIrp
116 );
117
118_Requires_lock_held_(_Global_critical_region_)
119IO_STATUS_BLOCK
120FatOpenTargetDirectory (
121 _In_ PIRP_CONTEXT IrpContext,
122 _Inout_ PFILE_OBJECT FileObject,
123 _Inout_ PDCB Dcb,
124 _In_ PACCESS_MASK DesiredAccess,
125 _In_ USHORT ShareAccess,
126 _In_ BOOLEAN DoesNameExist,
127 _In_ BOOLEAN FileNameOpenedDos
128 );
129
130_Success_(return.Status == STATUS_SUCCESS)
131_Requires_lock_held_(_Global_critical_region_)
132IO_STATUS_BLOCK
133FatOpenExistingDirectory (
134 _In_ PIRP_CONTEXT IrpContext,
135 _In_ PIO_STACK_LOCATION IrpSp,
136 _Inout_ PFILE_OBJECT FileObject,
137 _Inout_ PVCB Vcb,
138 _Outptr_result_maybenull_ PDCB *Dcb,
139 _In_ PDCB ParentDcb,
140 _In_ PDIRENT Dirent,
141 _In_ ULONG LfnByteOffset,
142 _In_ ULONG DirentByteOffset,
143 _In_ PUNICODE_STRING Lfn,
144 _In_ PACCESS_MASK DesiredAccess,
145 _In_ USHORT ShareAccess,
146 _In_ ULONG CreateDisposition,
147 _In_ BOOLEAN NoEaKnowledge,
148 _In_ BOOLEAN DeleteOnClose,
149 _In_ BOOLEAN FileNameOpenedDos,
150 _In_ BOOLEAN OpenRequiringOplock
151 );
152
153_Requires_lock_held_(_Global_critical_region_)
154IO_STATUS_BLOCK
155FatOpenExistingFile (
156 _In_ PIRP_CONTEXT IrpContext,
157 _Inout_ PFILE_OBJECT FileObject,
158 _Inout_ PVCB Vcb,
159 _Outptr_result_maybenull_ PFCB *Fcb,
160 _In_ PDCB ParentDcb,
161 _In_ PDIRENT Dirent,
162 _In_ ULONG LfnByteOffset,
163 _In_ ULONG DirentByteOffset,
164 _In_ PUNICODE_STRING Lfn,
165 _In_ PUNICODE_STRING OrigLfn,
166 _In_ PACCESS_MASK DesiredAccess,
167 _In_ USHORT ShareAccess,
168 _In_ ULONG AllocationSize,
169 _In_ PFILE_FULL_EA_INFORMATION EaBuffer,
170 _In_ ULONG EaLength,
171 _In_ USHORT FileAttributes,
172 _In_ ULONG CreateDisposition,
173 _In_ BOOLEAN IsPagingFile,
174 _In_ BOOLEAN NoEaKnowledge,
175 _In_ BOOLEAN DeleteOnClose,
176 _In_ BOOLEAN OpenRequiringOplock,
177 _In_ BOOLEAN FileNameOpenedDos
178 );
179
180_Requires_lock_held_(_Global_critical_region_)
181IO_STATUS_BLOCK
182FatCreateNewDirectory (
183 _In_ PIRP_CONTEXT IrpContext,
184 _In_ PIO_STACK_LOCATION IrpSp,
185 _Inout_ PFILE_OBJECT FileObject,
186 _Inout_ PVCB Vcb,
187 _Inout_ PDCB ParentDcb,
188 _In_ POEM_STRING OemName,
189 _In_ PUNICODE_STRING UnicodeName,
190 _In_ PACCESS_MASK DesiredAccess,
191 _In_ USHORT ShareAccess,
192 _In_ PFILE_FULL_EA_INFORMATION EaBuffer,
193 _In_ ULONG EaLength,
194 _In_ USHORT FileAttributes,
195 _In_ BOOLEAN NoEaKnowledge,
196 _In_ BOOLEAN DeleteOnClose,
197 _In_ BOOLEAN OpenRequiringOplock
198 );
199
200_Requires_lock_held_(_Global_critical_region_)
201IO_STATUS_BLOCK
202FatCreateNewFile (
203 _In_ PIRP_CONTEXT IrpContext,
204 _In_ PIO_STACK_LOCATION IrpSp,
205 _Inout_ PFILE_OBJECT FileObject,
206 _Inout_ PVCB Vcb,
207 _Inout_ PDCB ParentDcb,
208 _In_ POEM_STRING OemName,
209 _In_ PUNICODE_STRING UnicodeName,
210 _In_ PACCESS_MASK DesiredAccess,
211 _In_ USHORT ShareAccess,
212 _In_ ULONG AllocationSize,
213 _In_ PFILE_FULL_EA_INFORMATION EaBuffer,
214 _In_ ULONG EaLength,
215 _In_ USHORT FileAttributes,
216 _In_ PUNICODE_STRING LfnBuffer,
217 _In_ BOOLEAN IsPagingFile,
218 _In_ BOOLEAN NoEaKnowledge,
219 _In_ BOOLEAN DeleteOnClose,
220 _In_ BOOLEAN OpenRequiringOplock,
221 _In_ BOOLEAN TemporaryFile
222 );
223
224
225_Requires_lock_held_(_Global_critical_region_)
226IO_STATUS_BLOCK
227FatSupersedeOrOverwriteFile (
228 _In_ PIRP_CONTEXT IrpContext,
229 _Inout_ PFILE_OBJECT FileObject,
230 _Inout_ PFCB Fcb,
231 _In_ ULONG AllocationSize,
232 _In_ PFILE_FULL_EA_INFORMATION EaBuffer,
233 _In_ ULONG EaLength,
234 _In_ USHORT FileAttributes,
235 _In_ ULONG CreateDisposition,
236 _In_ BOOLEAN NoEaKnowledge
237 );
238
239NTSTATUS
240FatCheckSystemSecurityAccess (
241 _In_ PIRP_CONTEXT IrpContext
242 );
243
244NTSTATUS
245FatCheckShareAccess (
246 _In_ PIRP_CONTEXT IrpContext,
247 _In_ PFILE_OBJECT FileObject,
248 _In_ PFCB Fcb,
249 _In_ PACCESS_MASK DesiredAccess,
250 _In_ ULONG ShareAccess
251 );
252
253#ifdef ALLOC_PRAGMA
254#pragma alloc_text(PAGE, FatCheckShareAccess)
255#pragma alloc_text(PAGE, FatCheckSystemSecurityAccess)
256#pragma alloc_text(PAGE, FatCommonCreate)
257
258#if (NTDDI_VERSION >= NTDDI_WINTHRESHOLD)
259#pragma alloc_text(PAGE, FatCommonCreateOnNewStack)
260#pragma alloc_text(PAGE, FatCommonCreateCallout)
261#endif
262
263#pragma alloc_text(PAGE, FatCreateNewDirectory)
264#pragma alloc_text(PAGE, FatCreateNewFile)
265#pragma alloc_text(PAGE, FatFsdCreate)
266#pragma alloc_text(PAGE, FatOpenExistingDcb)
267#pragma alloc_text(PAGE, FatOpenExistingDirectory)
268#pragma alloc_text(PAGE, FatOpenExistingFcb)
269#pragma alloc_text(PAGE, FatOpenExistingFile)
270#pragma alloc_text(PAGE, FatOpenRootDcb)
271#pragma alloc_text(PAGE, FatOpenTargetDirectory)
272#pragma alloc_text(PAGE, FatOpenVolume)
273#pragma alloc_text(PAGE, FatSupersedeOrOverwriteFile)
274#pragma alloc_text(PAGE, FatSetFullNameInFcb)
275#endif
276
277
278_Function_class_(IRP_MJ_CREATE)
279_Function_class_(DRIVER_DISPATCH)
280NTSTATUS
281NTAPI
282FatFsdCreate (
283 _In_ PVOLUME_DEVICE_OBJECT VolumeDeviceObject,
284 _Inout_ PIRP Irp
285 )
286
287/*++
288
289Routine Description:
290
291 This routine implements the FSD part of the NtCreateFile and NtOpenFile
292 API calls.
293
294Arguments:
295
296 VolumeDeviceObject - Supplies the volume device object where the
297 file/directory exists that we are trying to open/create
298
299 Irp - Supplies the Irp being processed
300
301Return Value:
302
303 NTSTATUS - The Fsd status for the Irp
304
305--*/
306
307{
308 NTSTATUS Status;
309 PIRP_CONTEXT IrpContext = NULL;
310
311 BOOLEAN TopLevel;
312 BOOLEAN ExceptionCompletedIrp = FALSE;
313
314
315 PAGED_CODE();
316
317 //
318 // If we were called with our file system device object instead of a
319 // volume device object, just complete this request with STATUS_SUCCESS
320 //
321
322 if ( FatDeviceIsFatFsdo( VolumeDeviceObject)) {
323
324 Irp->IoStatus.Status = STATUS_SUCCESS;
325 Irp->IoStatus.Information = FILE_OPENED;
326
327 IoCompleteRequest( Irp, IO_DISK_INCREMENT );
328
329 return STATUS_SUCCESS;
330 }
331
332 TimerStart(Dbg);
333
334 DebugTrace(+1, Dbg, "FatFsdCreate\n", 0);
335
336 //
337 // Call the common create routine, with block allowed if the operation
338 // is synchronous.
339 //
340
341 FsRtlEnterFileSystem();
342
343 TopLevel = FatIsIrpTopLevel( Irp );
344
345 _SEH2_TRY {
346
347 IrpContext = FatCreateIrpContext( Irp, TRUE );
348
349#if (NTDDI_VERSION >= NTDDI_WINTHRESHOLD)
350 Status = FatCommonCreateOnNewStack( IrpContext, Irp );
351#else
352 Status = FatCommonCreate( IrpContext, Irp );
353#endif
354
355 } _SEH2_EXCEPT(FatExceptionFilter( IrpContext, _SEH2_GetExceptionInformation() )) {
356
357 //
358 // We had some trouble trying to perform the requested
359 // operation, so we'll abort the I/O request with
360 // the error status that we get back from the
361 // execption code
362 //
363
364 Status = FatProcessException( IrpContext, Irp, _SEH2_GetExceptionCode() );
365 ExceptionCompletedIrp = TRUE;
366 } _SEH2_END;
367
368 if (TopLevel) { IoSetTopLevelIrp( NULL ); }
369
370 FsRtlExitFileSystem();
371
372
373 //
374 // Complete the request, unless we had an exception, in which case it
375 // was completed in FatProcessException (and the IrpContext freed).
376 //
377 // IrpContext is freed inside FatCompleteRequest.
378 //
379
380 if (!ExceptionCompletedIrp && Status != STATUS_PENDING) {
381 FatCompleteRequest( IrpContext, Irp, Status );
382 }
383
384 //
385 // And return to our caller
386 //
387
388 DebugTrace(-1, Dbg, "FatFsdCreate -> %08lx\n", Status );
389
390 TimerStop(Dbg,"FatFsdCreate");
391
392 UNREFERENCED_PARAMETER( VolumeDeviceObject );
393
394 return Status;
395}
396
397#if (NTDDI_VERSION >= NTDDI_WINTHRESHOLD)
398_Requires_lock_held_(_Global_critical_region_)
399VOID
400FatCommonCreateCallout (
401 _In_ PFAT_CALLOUT_PARAMETERS CalloutParameters
402 )
403
404/*++
405
406Routine Description:
407
408 This function is the callout routine that will execute on a new stack when
409 processing a create. It simply calls FatCommonCreate() with the parameters
410 in the context and stores the return value in the context.
411
412Arguments:
413
414 Context - Supplies an opaque pointer to this function's context. It is actually
415 an FAT_CALLOUT_PARAMETERS structure.
416
417Return Value:
418
419 None.
420
421--*/
422
423{
424 PAGED_CODE();
425
426 //
427 // Call FatCommonCreate() with the passed parameters and store the result.
428 // Exceptions cannot be raised across stack boundaries, so we need to catch
429 // exceptions here and deal with them.
430 //
431
432 try {
433
434 CalloutParameters->IrpStatus = FatCommonCreate( CalloutParameters->Create.IrpContext,
435 CalloutParameters->Create.Irp );
436
437 } except (FatExceptionFilter( CalloutParameters->Create.IrpContext, GetExceptionInformation() )) {
438
439 //
440 // Return the resulting status.
441 //
442
443 CalloutParameters->ExceptionStatus = GetExceptionCode();
444 }
445
446}
447
448
449_Requires_lock_held_(_Global_critical_region_)
450NTSTATUS
451FatCommonCreateOnNewStack (
452 _In_ PIRP_CONTEXT IrpContext,
453 _In_ PIRP Irp
454 )
455
456/*++
457
458Routine Description:
459
460 This routine sets up a switch to a new stack and call to FatCommonCreate().
461
462Arguments:
463
464 IrpContext - Supplies the context structure for the overall request.
465
466 Irp - Supplies the IRP being processed.
467
468 CreateContext - Supplies a pointer on the old stack that is used to
469 store context information for the create itself.
470
471Return Value:
472
473 NTSTATUS - The status from FatCommonCreate().
474
475--*/
476{
477 FAT_CALLOUT_PARAMETERS CalloutParameters;
478 NTSTATUS status;
479
480 PAGED_CODE();
481
482 //
483 // Create requests consume a lot of stack space. As such, we always switch to a
484 // new stack when processing a create. Setup the callout parameters and make the
485 // call. Note that this cannot fail, since we pass a stack context for a reserve stack.
486 //
487
488 CalloutParameters.Create.IrpContext = IrpContext;
489 CalloutParameters.Create.Irp = Irp;
490 CalloutParameters.ExceptionStatus = CalloutParameters.IrpStatus = STATUS_SUCCESS;
491
492 //
493 // Mark that we are swapping the stack
494 //
495
496 SetFlag( IrpContext->Flags, IRP_CONTEXT_FLAG_SWAPPED_STACK );
497
498 status = KeExpandKernelStackAndCalloutEx( FatCommonCreateCallout,
499 &CalloutParameters,
500 KERNEL_STACK_SIZE,
501 FALSE,
502 NULL );
503
504 //
505 // Mark that the stack is no longer swapped. Note that there are paths
506 // that may clear this flag before returning.
507 //
508
509 if (status != STATUS_PENDING) {
510
511 ClearFlag( IrpContext->Flags, IRP_CONTEXT_FLAG_SWAPPED_STACK );
512 }
513
514 //
515 // If we had an exception occur, re-raise the exception.
516 //
517
518 if (!NT_SUCCESS( CalloutParameters.ExceptionStatus )) {
519 FatRaiseStatus( IrpContext, CalloutParameters.ExceptionStatus );
520 }
521
522 //
523 // If the call to KeExpandKernelStackAndCalloutEx returns an error this
524 // means that the callout routine (FatCommonCreateCallout) was never
525 // called. Translate that error, and return it.
526 //
527
528 if (!NT_SUCCESS( status )) {
529
530 //
531 // Translate to an expected error value
532 //
533
534 if (status == STATUS_NO_MEMORY) {
535
536 status = STATUS_INSUFFICIENT_RESOURCES;
537 }
538
539 return status;
540 }
541
542 //
543 // Return the status given to us by the callout.
544 //
545
546 return CalloutParameters.IrpStatus;
547}
548#endif
549
550_Requires_lock_held_(_Global_critical_region_)
551NTSTATUS
552FatCommonCreate (
553 _Inout_ PIRP_CONTEXT IrpContext,
554 _Inout_ PIRP Irp
555 )
556
557/*++
558
559Routine Description:
560
561 This is the common routine for creating/opening a file called by
562 both the fsd and fsp threads.
563
564Arguments:
565
566 Irp - Supplies the Irp to process
567
568Return Value:
569
570 NTSTATUS - the return status for the operation
571
572--*/
573
574{
575 NTSTATUS Status;
576 IO_STATUS_BLOCK Iosb = {0};
577 PIO_STACK_LOCATION IrpSp;
578
579 PFILE_OBJECT FileObject;
580 PFILE_OBJECT RelatedFileObject;
581 UNICODE_STRING FileName;
582 ULONG AllocationSize;
583 PFILE_FULL_EA_INFORMATION EaBuffer;
584 PACCESS_MASK DesiredAccess;
585 ULONG Options;
586 USHORT FileAttributes;
587 USHORT ShareAccess;
588 ULONG EaLength;
589
590 BOOLEAN CreateDirectory;
591 BOOLEAN NoIntermediateBuffering;
592 BOOLEAN OpenDirectory;
593 BOOLEAN IsPagingFile;
594 BOOLEAN OpenTargetDirectory;
595 BOOLEAN DirectoryFile;
596 BOOLEAN NonDirectoryFile;
597 BOOLEAN NoEaKnowledge;
598 BOOLEAN DeleteOnClose;
599 BOOLEAN OpenRequiringOplock;
600 BOOLEAN TemporaryFile;
601 BOOLEAN FileNameOpenedDos = FALSE;
602
603 ULONG CreateDisposition;
604
605 PVCB Vcb;
606 PFCB Fcb = NULL;
607 PCCB Ccb;
608 PDCB ParentDcb;
609 PDCB FinalDcb = NULL;
610
611 UNICODE_STRING FinalName = {0};
612 UNICODE_STRING RemainingPart;
613 UNICODE_STRING NextRemainingPart = {0};
614 UNICODE_STRING UpcasedFinalName;
615 WCHAR UpcasedBuffer[ FAT_CREATE_INITIAL_NAME_BUF_SIZE];
616
617 OEM_STRING OemFinalName;
618 UCHAR OemBuffer[ FAT_CREATE_INITIAL_NAME_BUF_SIZE*2];
619
620 PDIRENT Dirent;
621 PBCB DirentBcb = NULL;
622 ULONG LfnByteOffset;
623 ULONG DirentByteOffset;
624
625 BOOLEAN PostIrp = FALSE;
626 BOOLEAN OplockPostIrp = FALSE;
627 BOOLEAN TrailingBackslash;
628 BOOLEAN FirstLoop = TRUE;
629
630 ULONG MatchFlags = 0;
631
632 CCB LocalCcb;
633 UNICODE_STRING Lfn;
634 UNICODE_STRING OrigLfn = {0};
635
636 WCHAR LfnBuffer[ FAT_CREATE_INITIAL_NAME_BUF_SIZE];
637
638 PAGED_CODE();
639
640 //
641 // Get the current IRP stack location
642 //
643
644 IrpSp = IoGetCurrentIrpStackLocation( Irp );
645
646 DebugTrace(+1, Dbg, "FatCommonCreate\n", 0 );
647 DebugTrace( 0, Dbg, "Irp = %p\n", Irp );
648 DebugTrace( 0, Dbg, "->Flags = %08lx\n", Irp->Flags );
649 DebugTrace( 0, Dbg, "->FileObject = %p\n", IrpSp->FileObject );
650 DebugTrace( 0, Dbg, " ->RelatedFileObject = %p\n", IrpSp->FileObject->RelatedFileObject );
651 DebugTrace( 0, Dbg, " ->FileName = %wZ\n", &IrpSp->FileObject->FileName );
652 DebugTrace( 0, Dbg, " ->FileName.Length = 0n%d\n", IrpSp->FileObject->FileName.Length );
653 DebugTrace( 0, Dbg, "->AllocationSize.LowPart = %08lx\n", Irp->Overlay.AllocationSize.LowPart );
654 DebugTrace( 0, Dbg, "->AllocationSize.HighPart = %08lx\n", Irp->Overlay.AllocationSize.HighPart );
655 DebugTrace( 0, Dbg, "->SystemBuffer = %p\n", Irp->AssociatedIrp.SystemBuffer );
656 DebugTrace( 0, Dbg, "->DesiredAccess = %08lx\n", IrpSp->Parameters.Create.SecurityContext->DesiredAccess );
657 DebugTrace( 0, Dbg, "->Options = %08lx\n", IrpSp->Parameters.Create.Options );
658 DebugTrace( 0, Dbg, "->FileAttributes = %04x\n", IrpSp->Parameters.Create.FileAttributes );
659 DebugTrace( 0, Dbg, "->ShareAccess = %04x\n", IrpSp->Parameters.Create.ShareAccess );
660 DebugTrace( 0, Dbg, "->EaLength = %08lx\n", IrpSp->Parameters.Create.EaLength );
661
662 //
663 // This is here because the Win32 layer can't avoid sending me double
664 // beginning backslashes.
665 //
666
667 if ((IrpSp->FileObject->FileName.Length > sizeof(WCHAR)) &&
668 (IrpSp->FileObject->FileName.Buffer[1] == L'\\') &&
669 (IrpSp->FileObject->FileName.Buffer[0] == L'\\')) {
670
671 IrpSp->FileObject->FileName.Length -= sizeof(WCHAR);
672
673 RtlMoveMemory( &IrpSp->FileObject->FileName.Buffer[0],
674 &IrpSp->FileObject->FileName.Buffer[1],
675 IrpSp->FileObject->FileName.Length );
676
677 //
678 // If there are still two beginning backslashes, the name is bogus.
679 //
680
681 if ((IrpSp->FileObject->FileName.Length > sizeof(WCHAR)) &&
682 (IrpSp->FileObject->FileName.Buffer[1] == L'\\') &&
683 (IrpSp->FileObject->FileName.Buffer[0] == L'\\')) {
684
685 DebugTrace(-1, Dbg, "FatCommonCreate -> STATUS_OBJECT_NAME_INVALID\n", 0);
686 return STATUS_OBJECT_NAME_INVALID;
687 }
688 }
689
690 //
691 // Reference our input parameters to make things easier
692 //
693
694 NT_ASSERT( IrpSp->Parameters.Create.SecurityContext != NULL );
695
696 FileObject = IrpSp->FileObject;
697 FileName = FileObject->FileName;
698 RelatedFileObject = FileObject->RelatedFileObject;
699 AllocationSize = Irp->Overlay.AllocationSize.LowPart;
700 EaBuffer = Irp->AssociatedIrp.SystemBuffer;
701 DesiredAccess = &IrpSp->Parameters.Create.SecurityContext->DesiredAccess;
702 Options = IrpSp->Parameters.Create.Options;
703 FileAttributes = IrpSp->Parameters.Create.FileAttributes & ~FILE_ATTRIBUTE_NORMAL;
704 ShareAccess = IrpSp->Parameters.Create.ShareAccess;
705 EaLength = IrpSp->Parameters.Create.EaLength;
706
707 //
708 // Set up the file object's Vpb pointer in case anything happens.
709 // This will allow us to get a reasonable pop-up.
710 //
711
712 if ( RelatedFileObject != NULL ) {
713 FileObject->Vpb = RelatedFileObject->Vpb;
714 }
715
716 //
717 // Force setting the archive bit in the attributes byte to follow OS/2,
718 // & DOS semantics. Also mask out any extraneous bits, note that
719 // we can't use the ATTRIBUTE_VALID_FLAGS constant because that has
720 // the control and normal flags set.
721 //
722 // Delay setting ARCHIVE in case this is a directory: 2/16/95
723 //
724
725 FileAttributes &= (FILE_ATTRIBUTE_READONLY |
726 FILE_ATTRIBUTE_HIDDEN |
727 FILE_ATTRIBUTE_SYSTEM |
728 FILE_ATTRIBUTE_ARCHIVE |
729 FILE_ATTRIBUTE_ENCRYPTED);
730
731 //
732 // Locate the volume device object and Vcb that we are trying to access
733 //
734
735 Vcb = &((PVOLUME_DEVICE_OBJECT)IrpSp->DeviceObject)->Vcb;
736
737 //
738 // Decipher Option flags and values
739 //
740
741 //
742 // If this is an open by fileid operation, just fail it explicitly. FAT's
743 // source of fileids is not reversible for open operations.
744 //
745
746 if (BooleanFlagOn( Options, FILE_OPEN_BY_FILE_ID )) {
747
748 return STATUS_NOT_IMPLEMENTED;
749 }
750
751 DirectoryFile = BooleanFlagOn( Options, FILE_DIRECTORY_FILE );
752 NonDirectoryFile = BooleanFlagOn( Options, FILE_NON_DIRECTORY_FILE );
753 NoIntermediateBuffering = BooleanFlagOn( Options, FILE_NO_INTERMEDIATE_BUFFERING );
754 NoEaKnowledge = BooleanFlagOn( Options, FILE_NO_EA_KNOWLEDGE );
755 DeleteOnClose = BooleanFlagOn( Options, FILE_DELETE_ON_CLOSE );
756#if (NTDDI_VERSION >= NTDDI_WIN7)
757 OpenRequiringOplock = BooleanFlagOn( Options, FILE_OPEN_REQUIRING_OPLOCK );
758#else
759 OpenRequiringOplock = FALSE;
760#endif
761
762 TemporaryFile = BooleanFlagOn( IrpSp->Parameters.Create.FileAttributes,
763 FILE_ATTRIBUTE_TEMPORARY );
764
765 CreateDisposition = (Options >> 24) & 0x000000ff;
766
767 IsPagingFile = BooleanFlagOn( IrpSp->Flags, SL_OPEN_PAGING_FILE );
768 OpenTargetDirectory = BooleanFlagOn( IrpSp->Flags, SL_OPEN_TARGET_DIRECTORY );
769
770 CreateDirectory = (BOOLEAN)(DirectoryFile &&
771 ((CreateDisposition == FILE_CREATE) ||
772 (CreateDisposition == FILE_OPEN_IF)));
773
774 OpenDirectory = (BOOLEAN)(DirectoryFile &&
775 ((CreateDisposition == FILE_OPEN) ||
776 (CreateDisposition == FILE_OPEN_IF)));
777
778
779 //
780 // Make sure the input large integer is valid and that the dir/nondir
781 // indicates a storage type we understand.
782 //
783
784 if (Irp->Overlay.AllocationSize.HighPart != 0 ||
785 (DirectoryFile && NonDirectoryFile)) {
786
787 DebugTrace(-1, Dbg, "FatCommonCreate -> STATUS_INVALID_PARAMETER\n", 0);
788 return STATUS_INVALID_PARAMETER;
789 }
790
791 //
792 // Acquire exclusive access to the vcb, and enqueue the Irp if
793 // we didn't get it.
794 //
795
796 if (!FatAcquireExclusiveVcb( IrpContext, Vcb )) {
797
798 DebugTrace(0, Dbg, "Cannot acquire Vcb\n", 0);
799
800 Iosb.Status = FatFsdPostRequest( IrpContext, Irp );
801
802 DebugTrace(-1, Dbg, "FatCommonCreate -> %08lx\n", Iosb.Status );
803 return Iosb.Status;
804 }
805
806 //
807 // Make sure we haven't been called recursively by a filter inside an existing
808 // create request.
809 //
810
811 if (FlagOn( Vcb->VcbState, VCB_STATE_FLAG_CREATE_IN_PROGRESS)) {
812
813#ifdef _MSC_VER
814#pragma prefast( suppress:28159, "this is a serious programming error if it happens" )
815#endif
816 FatBugCheck( 0, 0, 0);
817 }
818
819 //
820 // Initialize the DirentBcb to null
821 //
822
823 DirentBcb = NULL;
824
825 //
826 // Initialize our temp strings with their stack buffers.
827 //
828
829 OemFinalName.Length = 0;
830 OemFinalName.MaximumLength = sizeof( OemBuffer);
831 OemFinalName.Buffer = (PCHAR)OemBuffer;
832
833 UpcasedFinalName.Length = 0;
834 UpcasedFinalName.MaximumLength = sizeof( UpcasedBuffer);
835 UpcasedFinalName.Buffer = UpcasedBuffer;
836
837 Lfn.Length = 0;
838 Lfn.MaximumLength = sizeof( LfnBuffer);
839 Lfn.Buffer = LfnBuffer;
840
841 _SEH2_TRY {
842
843 //
844 // Make sure the vcb is in a usable condition. This will raise
845 // and error condition if the volume is unusable
846 //
847
848 FatVerifyVcb( IrpContext, Vcb );
849
850 //
851 // If the Vcb is locked then we cannot open another file
852 //
853
854 if (FlagOn(Vcb->VcbState, VCB_STATE_FLAG_LOCKED)) {
855
856 DebugTrace(0, Dbg, "Volume is locked\n", 0);
857
858 Status = STATUS_ACCESS_DENIED;
859 if (Vcb->VcbCondition != VcbGood) {
860
861 Status = STATUS_VOLUME_DISMOUNTED;
862 }
863 try_return( Iosb.Status = Status );
864 }
865
866 //
867 // Don't allow the DELETE_ON_CLOSE option if the volume is
868 // write-protected.
869 //
870
871 if (DeleteOnClose && FlagOn(Vcb->VcbState, VCB_STATE_FLAG_WRITE_PROTECTED)) {
872
873 //
874 // Set the real device for the pop-up info, and set the verify
875 // bit in the device object, so that we will force a verify
876 // in case the user put the correct media back in.
877 //
878
879 IoSetHardErrorOrVerifyDevice( IrpContext->OriginatingIrp,
880 Vcb->Vpb->RealDevice );
881
882 SetFlag(Vcb->Vpb->RealDevice->Flags, DO_VERIFY_VOLUME);
883
884 FatRaiseStatus( IrpContext, STATUS_MEDIA_WRITE_PROTECTED );
885 }
886
887 //
888 // If this is a fat32 volume, EA's are not supported.
889 //
890
891 if (EaBuffer != NULL) {
892
893 try_return( Iosb.Status = STATUS_EAS_NOT_SUPPORTED );
894 }
895
896 //
897 // Check if we are opening the volume and not a file/directory.
898 // We are opening the volume if the name is empty and there
899 // isn't a related file object. If there is a related file object
900 // then it is the Vcb itself.
901 //
902
903 if (FileName.Length == 0) {
904
905 PVCB DecodeVcb = NULL;
906
907 if (RelatedFileObject == NULL ||
908 FatDecodeFileObject( RelatedFileObject,
909 &DecodeVcb,
910 &Fcb,
911 &Ccb ) == UserVolumeOpen) {
912
913 NT_ASSERT( RelatedFileObject == NULL || Vcb == DecodeVcb );
914
915 //
916 // Check if we were to open a directory
917 //
918
919 if (DirectoryFile) {
920
921 DebugTrace(0, Dbg, "Cannot open volume as a directory\n", 0);
922
923 try_return( Iosb.Status = STATUS_NOT_A_DIRECTORY );
924 }
925
926 //
927 // Can't open the TargetDirectory of the DASD volume.
928 //
929
930 if (OpenTargetDirectory) {
931
932 try_return( Iosb.Status = STATUS_INVALID_PARAMETER );
933 }
934
935 DebugTrace(0, Dbg, "Opening the volume, Vcb = %p\n", Vcb);
936
937 CollectCreateHitStatistics(Vcb);
938
939 Iosb = FatOpenVolume( IrpContext,
940 FileObject,
941 Vcb,
942 DesiredAccess,
943 ShareAccess,
944 CreateDisposition );
945
946 Irp->IoStatus.Information = Iosb.Information;
947 try_return( Iosb.Status );
948 }
949 }
950
951 //
952 // If there is a related file object then this is a relative open.
953 // The related file object is the directory to start our search at.
954 // Return an error if it is not a directory.
955 //
956
957 if (RelatedFileObject != NULL) {
958
959 PVCB RelatedVcb;
960 PDCB RelatedDcb;
961 PCCB RelatedCcb;
962 TYPE_OF_OPEN TypeOfOpen;
963
964 TypeOfOpen = FatDecodeFileObject( RelatedFileObject,
965 &RelatedVcb,
966 &RelatedDcb,
967 &RelatedCcb );
968
969 if (TypeOfOpen != UserFileOpen &&
970 TypeOfOpen != UserDirectoryOpen) {
971
972 DebugTrace(0, Dbg, "Invalid related file object\n", 0);
973
974 try_return( Iosb.Status = STATUS_OBJECT_PATH_NOT_FOUND );
975 }
976
977 //
978 // A relative open must be via a relative path.
979 //
980
981 if (FileName.Length != 0 &&
982 FileName.Buffer[0] == L'\\') {
983
984 try_return( Iosb.Status = STATUS_OBJECT_NAME_INVALID );
985 }
986
987 //
988 // Set up the file object's Vpb pointer in case anything happens.
989 //
990
991 NT_ASSERT( Vcb == RelatedVcb );
992
993 FileObject->Vpb = RelatedFileObject->Vpb;
994
995 //
996 // Now verify the related Fcb so we don't get in trouble later
997 // by assuming its in good shape.
998 //
999
1000 FatVerifyFcb( IrpContext, RelatedDcb );
1001
1002 ParentDcb = RelatedDcb;
1003
1004 } else {
1005
1006 //
1007 // This is not a relative open, so check if we're
1008 // opening the root dcb
1009 //
1010
1011 if ((FileName.Length == sizeof(WCHAR)) &&
1012 (FileName.Buffer[0] == L'\\')) {
1013
1014 //
1015 // Check if we were not supposed to open a directory
1016 //
1017
1018 if (NonDirectoryFile) {
1019
1020 DebugTrace(0, Dbg, "Cannot open root directory as a file\n", 0);
1021
1022 try_return( Iosb.Status = STATUS_FILE_IS_A_DIRECTORY );
1023 }
1024
1025 //
1026 // Can't open the TargetDirectory of the root directory.
1027 //
1028
1029 if (OpenTargetDirectory) {
1030
1031 try_return( Iosb.Status = STATUS_INVALID_PARAMETER );
1032 }
1033
1034 //
1035 // Not allowed to delete root directory.
1036 //
1037
1038 if (DeleteOnClose) {
1039
1040 try_return( Iosb.Status = STATUS_CANNOT_DELETE );
1041 }
1042
1043 DebugTrace(0, Dbg, "Opening root dcb\n", 0);
1044
1045 CollectCreateHitStatistics(Vcb);
1046
1047 Iosb = FatOpenRootDcb( IrpContext,
1048 FileObject,
1049 Vcb,
1050 DesiredAccess,
1051 ShareAccess,
1052 CreateDisposition );
1053
1054 Irp->IoStatus.Information = Iosb.Information;
1055 try_return( Iosb.Status );
1056 }
1057
1058 //
1059 // Nope, we will be opening relative to the root directory.
1060 //
1061
1062 ParentDcb = Vcb->RootDcb;
1063
1064 //
1065 // Now verify the root Dcb so we don't get in trouble later
1066 // by assuming its in good shape.
1067 //
1068
1069 FatVerifyFcb( IrpContext, ParentDcb );
1070 }
1071
1072 //
1073 // FatCommonCreate(): trailing backslash check
1074 //
1075
1076
1077 if ((FileName.Length != 0) &&
1078 (FileName.Buffer[FileName.Length/sizeof(WCHAR)-1] == L'\\')) {
1079
1080 FileName.Length -= sizeof(WCHAR);
1081 TrailingBackslash = TRUE;
1082
1083 } else {
1084
1085 TrailingBackslash = FALSE;
1086 }
1087
1088 //
1089 // Check for max path. We might want to tighten this down to DOS MAX_PATH
1090 // for maximal interchange with non-NT platforms, but for now defer to the
1091 // possibility of something depending on it.
1092 //
1093
1094 if (ParentDcb->FullFileName.Buffer == NULL) {
1095
1096 FatSetFullFileNameInFcb( IrpContext, ParentDcb );
1097 }
1098
1099 if ((USHORT) (ParentDcb->FullFileName.Length + sizeof(WCHAR) + FileName.Length) <= FileName.Length) {
1100
1101 try_return( Iosb.Status = STATUS_OBJECT_NAME_INVALID );
1102 }
1103
1104 //
1105 // We loop here until we land on an Fcb that is in a good
1106 // condition. This way we can reopen files that have stale handles
1107 // to files of the same name but are now different.
1108 //
1109
1110 while ( TRUE ) {
1111
1112 Fcb = ParentDcb;
1113 RemainingPart = FileName;
1114
1115 //
1116 // Now walk down the Dcb tree looking for the longest prefix.
1117 // This one exit condition in the while() is to handle a
1118 // special case condition (relative NULL name open), the main
1119 // exit conditions are at the bottom of the loop.
1120 //
1121
1122 while (RemainingPart.Length != 0) {
1123
1124 PFCB NextFcb;
1125
1126 FsRtlDissectName( RemainingPart,
1127 &FinalName,
1128 &NextRemainingPart );
1129
1130 //
1131 // If RemainingPart starts with a backslash the name is
1132 // invalid.
1133 // Check for no more than 255 characters in FinalName
1134 //
1135
1136 if (((NextRemainingPart.Length != 0) && (NextRemainingPart.Buffer[0] == L'\\')) ||
1137 (FinalName.Length > 255*sizeof(WCHAR))) {
1138
1139 try_return( Iosb.Status = STATUS_OBJECT_NAME_INVALID );
1140 }
1141
1142 //
1143 // Now, try to convert this one component into Oem and search
1144 // the splay tree. If it works then that's great, otherwise
1145 // we have to try with the UNICODE name instead.
1146 //
1147
1148 FatEnsureStringBufferEnough( &OemFinalName,
1149 FinalName.Length);
1150
1151 Status = RtlUpcaseUnicodeStringToCountedOemString( &OemFinalName, &FinalName, FALSE );
1152
1153
1154 if (NT_SUCCESS(Status)) {
1155
1156 NextFcb = FatFindFcb( IrpContext,
1157 &Fcb->Specific.Dcb.RootOemNode,
1158 (PSTRING)&OemFinalName,
1159 &FileNameOpenedDos );
1160
1161 } else {
1162
1163 NextFcb = NULL;
1164 OemFinalName.Length = 0;
1165
1166 if (Status != STATUS_UNMAPPABLE_CHARACTER) {
1167
1168 try_return( Iosb.Status = Status );
1169 }
1170 }
1171
1172 //
1173 // If we didn't find anything searching the Oem space, we
1174 // have to try the Unicode space. To save cycles in the
1175 // common case that this tree is empty, we do a quick check
1176 // here.
1177 //
1178
1179 if ((NextFcb == NULL) && Fcb->Specific.Dcb.RootUnicodeNode) {
1180
1181 //
1182 // First downcase, then upcase the string, because this
1183 // is what happens when putting names into the tree (see
1184 // strucsup.c, FatConstructNamesInFcb()).
1185 //
1186
1187 FatEnsureStringBufferEnough( &UpcasedFinalName,
1188 FinalName.Length);
1189
1190 Status = RtlDowncaseUnicodeString(&UpcasedFinalName, &FinalName, FALSE );
1191 NT_ASSERT( NT_SUCCESS( Status ));
1192
1193 Status = RtlUpcaseUnicodeString( &UpcasedFinalName, &UpcasedFinalName, FALSE );
1194 NT_ASSERT( NT_SUCCESS( Status ));
1195
1196
1197 NextFcb = FatFindFcb( IrpContext,
1198 &Fcb->Specific.Dcb.RootUnicodeNode,
1199 (PSTRING)&UpcasedFinalName,
1200 &FileNameOpenedDos );
1201 }
1202
1203 //
1204 // If we got back an Fcb then we consumed the FinalName
1205 // legitimately, so the remaining name is now RemainingPart.
1206 //
1207
1208 if (NextFcb != NULL) {
1209 Fcb = NextFcb;
1210 RemainingPart = NextRemainingPart;
1211 }
1212
1213 if ((NextFcb == NULL) ||
1214 (NodeType(NextFcb) == FAT_NTC_FCB) ||
1215 (NextRemainingPart.Length == 0)) {
1216
1217 break;
1218 }
1219 }
1220
1221 //
1222 // Remaining name cannot start with a backslash
1223 //
1224
1225 if (RemainingPart.Length && (RemainingPart.Buffer[0] == L'\\')) {
1226
1227 RemainingPart.Length -= sizeof(WCHAR);
1228 RemainingPart.Buffer += 1;
1229 }
1230
1231 //
1232 // Now verify that everybody up to the longest found prefix is valid.
1233 //
1234
1235 _SEH2_TRY {
1236
1237 FatVerifyFcb( IrpContext, Fcb );
1238
1239 } _SEH2_EXCEPT( (_SEH2_GetExceptionCode() == STATUS_FILE_INVALID) ?
1240 EXCEPTION_EXECUTE_HANDLER :
1241 EXCEPTION_CONTINUE_SEARCH ) {
1242
1243 FatResetExceptionState( IrpContext );
1244 } _SEH2_END;
1245
1246 if ( Fcb->FcbCondition == FcbGood ) {
1247
1248 //
1249 // If we are trying to open a paging file and have happened
1250 // upon the DelayedCloseFcb, make it go away, and try again.
1251 //
1252
1253 if (IsPagingFile && FirstLoop &&
1254 (NodeType(Fcb) == FAT_NTC_FCB) &&
1255 (!IsListEmpty( &FatData.AsyncCloseList ) ||
1256 !IsListEmpty( &FatData.DelayedCloseList ))) {
1257
1258 FatFspClose(Vcb);
1259
1260 FirstLoop = FALSE;
1261
1262 continue;
1263
1264 } else {
1265
1266 break;
1267 }
1268
1269 } else {
1270
1271 FatRemoveNames( IrpContext, Fcb );
1272 }
1273 }
1274
1275 NT_ASSERT( Fcb->FcbCondition == FcbGood );
1276
1277 //
1278 // If there is already an Fcb for a paging file open and
1279 // it was not already opened as a paging file, we cannot
1280 // continue as it is too difficult to move a live Fcb to
1281 // non-paged pool.
1282 //
1283
1284 if (IsPagingFile) {
1285
1286 if (NodeType(Fcb) == FAT_NTC_FCB &&
1287 !FlagOn( Fcb->FcbState, FCB_STATE_PAGING_FILE )) {
1288
1289 try_return( Iosb.Status = STATUS_SHARING_VIOLATION );
1290 }
1291
1292 //
1293 // Check for a system file.
1294 //
1295
1296 } else if (FlagOn( Fcb->FcbState, FCB_STATE_SYSTEM_FILE )) {
1297
1298 try_return( Iosb.Status = STATUS_ACCESS_DENIED );
1299 }
1300
1301 //
1302 // If the longest prefix is pending delete (either the file or
1303 // some higher level directory), we cannot continue.
1304 //
1305
1306 if (FlagOn( Fcb->FcbState, FCB_STATE_DELETE_ON_CLOSE )) {
1307
1308 try_return( Iosb.Status = STATUS_DELETE_PENDING );
1309 }
1310
1311 //
1312 // Now that we've found the longest matching prefix we'll
1313 // check if there isn't any remaining part because that means
1314 // we've located an existing fcb/dcb to open and we can do the open
1315 // without going to the disk
1316 //
1317
1318 if (RemainingPart.Length == 0) {
1319
1320 //
1321 // First check if the user wanted to open the target directory
1322 // and if so then call the subroutine to finish the open.
1323 //
1324
1325 if (OpenTargetDirectory) {
1326
1327 CollectCreateHitStatistics(Vcb);
1328
1329 Iosb = FatOpenTargetDirectory( IrpContext,
1330 FileObject,
1331 Fcb->ParentDcb,
1332 DesiredAccess,
1333 ShareAccess,
1334 TRUE,
1335 FileNameOpenedDos );
1336 Irp->IoStatus.Information = Iosb.Information;
1337 try_return( Iosb.Status );
1338 }
1339
1340 //
1341 // We can open an existing fcb/dcb, now we only need to case
1342 // on which type to open.
1343 //
1344
1345 if (NodeType(Fcb) == FAT_NTC_DCB || NodeType(Fcb) == FAT_NTC_ROOT_DCB) {
1346
1347 //
1348 // This is a directory we're opening up so check if
1349 // we were not to open a directory
1350 //
1351
1352 if (NonDirectoryFile) {
1353
1354 DebugTrace(0, Dbg, "Cannot open directory as a file\n", 0);
1355
1356 try_return( Iosb.Status = STATUS_FILE_IS_A_DIRECTORY );
1357 }
1358
1359 DebugTrace(0, Dbg, "Open existing dcb, Dcb = %p\n", Fcb);
1360
1361 CollectCreateHitStatistics(Vcb);
1362
1363 Iosb = FatOpenExistingDcb( IrpContext,
1364 IrpSp,
1365 FileObject,
1366 Vcb,
1367 (PDCB)Fcb,
1368 DesiredAccess,
1369 ShareAccess,
1370 CreateDisposition,
1371 NoEaKnowledge,
1372 DeleteOnClose,
1373 OpenRequiringOplock,
1374 FileNameOpenedDos,
1375 &OplockPostIrp );
1376
1377 if (Iosb.Status != STATUS_PENDING) {
1378
1379 Irp->IoStatus.Information = Iosb.Information;
1380
1381 } else {
1382
1383 DebugTrace(0, Dbg, "Enqueue Irp to FSP\n", 0);
1384
1385 PostIrp = TRUE;
1386 }
1387
1388 try_return( Iosb.Status );
1389 }
1390
1391 //
1392 // Check if we're trying to open an existing Fcb and that
1393 // the user didn't want to open a directory. Note that this
1394 // call might actually come back with status_pending because
1395 // the user wanted to supersede or overwrite the file and we
1396 // cannot block. If it is pending then we do not complete the
1397 // request, and we fall through the bottom to the code that
1398 // dispatches the request to the fsp.
1399 //
1400
1401 if (NodeType(Fcb) == FAT_NTC_FCB) {
1402
1403 //
1404 // Check if we were only to open a directory
1405 //
1406
1407 if (OpenDirectory) {
1408
1409 DebugTrace(0, Dbg, "Cannot open file as directory\n", 0);
1410
1411 try_return( Iosb.Status = STATUS_NOT_A_DIRECTORY );
1412 }
1413
1414 DebugTrace(0, Dbg, "Open existing fcb, Fcb = %p\n", Fcb);
1415
1416 if ( TrailingBackslash ) {
1417 try_return( Iosb.Status = STATUS_OBJECT_NAME_INVALID );
1418 }
1419
1420 CollectCreateHitStatistics(Vcb);
1421
1422 Iosb = FatOpenExistingFcb( IrpContext,
1423 IrpSp,
1424 FileObject,
1425 Vcb,
1426 Fcb,
1427 DesiredAccess,
1428 ShareAccess,
1429 AllocationSize,
1430 EaBuffer,
1431 EaLength,
1432 FileAttributes,
1433 CreateDisposition,
1434 NoEaKnowledge,
1435 DeleteOnClose,
1436 OpenRequiringOplock,
1437 FileNameOpenedDos,
1438 &OplockPostIrp );
1439
1440 if (Iosb.Status != STATUS_PENDING) {
1441
1442 //
1443 // Check if we need to set the cache support flag in
1444 // the file object
1445 //
1446
1447 if (NT_SUCCESS( Iosb.Status) && !NoIntermediateBuffering) {
1448
1449 FileObject->Flags |= FO_CACHE_SUPPORTED;
1450 }
1451
1452 Irp->IoStatus.Information = Iosb.Information;
1453
1454 } else {
1455
1456 DebugTrace(0, Dbg, "Enqueue Irp to FSP\n", 0);
1457
1458 PostIrp = TRUE;
1459 }
1460
1461 try_return( Iosb.Status );
1462 }
1463
1464 //
1465 // Not and Fcb or a Dcb so we bug check
1466 //
1467
1468#ifdef _MSC_VER
1469#pragma prefast( suppress:28159, "this is a serious corruption if it happens" )
1470#endif
1471 FatBugCheck( NodeType(Fcb), (ULONG_PTR) Fcb, 0 );
1472 }
1473
1474 //
1475 // There is more in the name to parse than we have in existing
1476 // fcbs/dcbs. So now make sure that fcb we got for the largest
1477 // matching prefix is really a dcb otherwise we can't go any
1478 // further
1479 //
1480
1481 if ((NodeType(Fcb) != FAT_NTC_DCB) && (NodeType(Fcb) != FAT_NTC_ROOT_DCB)) {
1482
1483 DebugTrace(0, Dbg, "Cannot open file as subdirectory, Fcb = %p\n", Fcb);
1484
1485 try_return( Iosb.Status = STATUS_OBJECT_PATH_NOT_FOUND );
1486 }
1487
1488 //
1489 // Otherwise we continue on processing the Irp and allowing ourselves
1490 // to block for I/O as necessary. Find/create additional dcb's for
1491 // the one we're trying to open. We loop until either remaining part
1492 // is empty or we get a bad filename. When we exit FinalName is
1493 // the last name in the string we're after, and ParentDcb is the
1494 // parent directory that will contain the opened/created
1495 // file/directory.
1496 //
1497 // Make sure the rest of the name is valid in at least the LFN
1498 // character set (which just happens to be that of HPFS).
1499 //
1500 // If we are not in ChicagoMode, use FAT semantics.
1501 //
1502
1503 ParentDcb = Fcb;
1504 FirstLoop = TRUE;
1505
1506 while (TRUE) {
1507
1508 //
1509 // We do one little optimization here on the first iteration of
1510 // the loop since we know that we have already tried to convert
1511 // FinalOemName from the original UNICODE.
1512 //
1513
1514 if (FirstLoop) {
1515
1516 FirstLoop = FALSE;
1517 RemainingPart = NextRemainingPart;
1518 Status = OemFinalName.Length ? STATUS_SUCCESS : STATUS_UNMAPPABLE_CHARACTER;
1519
1520 } else {
1521
1522 //
1523 // Dissect the remaining part.
1524 //
1525
1526 DebugTrace(0, Dbg, "Dissecting the name %wZ\n", &RemainingPart);
1527
1528 FsRtlDissectName( RemainingPart,
1529 &FinalName,
1530 &RemainingPart );
1531
1532 //
1533 // If RemainingPart starts with a backslash the name is
1534 // invalid.
1535 // Check for no more than 255 characters in FinalName
1536 //
1537
1538 if (((RemainingPart.Length != 0) && (RemainingPart.Buffer[0] == L'\\')) ||
1539 (FinalName.Length > 255*sizeof(WCHAR))) {
1540
1541 try_return( Iosb.Status = STATUS_OBJECT_NAME_INVALID );
1542 }
1543
1544 //
1545 // Now, try to convert this one component into Oem. If it works
1546 // then that's great, otherwise we have to try with the UNICODE
1547 // name instead.
1548 //
1549
1550 FatEnsureStringBufferEnough( &OemFinalName,
1551 FinalName.Length);
1552
1553 Status = RtlUpcaseUnicodeStringToCountedOemString( &OemFinalName, &FinalName, FALSE );
1554 }
1555
1556 if (NT_SUCCESS(Status)) {
1557
1558 //
1559 // We'll start by trying to locate the dirent for the name. Note
1560 // that we already know that there isn't an Fcb/Dcb for the file
1561 // otherwise we would have found it when we did our prefix lookup.
1562 //
1563
1564 if (FatIsNameShortOemValid( IrpContext, OemFinalName, FALSE, FALSE, FALSE )) {
1565
1566 FatStringTo8dot3( IrpContext,
1567 OemFinalName,
1568 &LocalCcb.OemQueryTemplate.Constant );
1569
1570 LocalCcb.Flags = 0;
1571
1572 } else {
1573
1574 LocalCcb.Flags = CCB_FLAG_SKIP_SHORT_NAME_COMPARE;
1575 }
1576
1577 } else {
1578
1579 LocalCcb.Flags = CCB_FLAG_SKIP_SHORT_NAME_COMPARE;
1580
1581 if (Status != STATUS_UNMAPPABLE_CHARACTER) {
1582
1583 try_return( Iosb.Status = Status );
1584 }
1585 }
1586
1587 //
1588 // Now we know a lot about the final name, so do legal name
1589 // checking here.
1590 //
1591
1592 if (FatData.ChicagoMode) {
1593
1594 if (!FatIsNameLongUnicodeValid( IrpContext, &FinalName, FALSE, FALSE, FALSE )) {
1595
1596 try_return( Iosb.Status = STATUS_OBJECT_NAME_INVALID );
1597 }
1598
1599 } else {
1600
1601 if (FlagOn(LocalCcb.Flags, CCB_FLAG_SKIP_SHORT_NAME_COMPARE)) {
1602
1603 try_return( Iosb.Status = STATUS_OBJECT_NAME_INVALID );
1604 }
1605 }
1606
1607 DebugTrace(0, Dbg, "FinalName is %wZ\n", &FinalName);
1608 DebugTrace(0, Dbg, "RemainingPart is %wZ\n", &RemainingPart);
1609
1610 FatEnsureStringBufferEnough( &UpcasedFinalName,
1611 FinalName.Length);
1612
1613 if (!NT_SUCCESS(Status = RtlUpcaseUnicodeString( &UpcasedFinalName, &FinalName, FALSE))) {
1614
1615 try_return( Iosb.Status = Status );
1616 }
1617
1618 LocalCcb.UnicodeQueryTemplate = UpcasedFinalName;
1619 LocalCcb.ContainsWildCards = FALSE;
1620
1621 Lfn.Length = 0;
1622
1623
1624 FatLocateDirent( IrpContext,
1625 ParentDcb,
1626 &LocalCcb,
1627 0,
1628 &MatchFlags,
1629 &Dirent,
1630 &DirentBcb,
1631 (PVBO)&DirentByteOffset,
1632 &FileNameOpenedDos,
1633 &Lfn,
1634 &OrigLfn);
1635
1636 //
1637 // Remember we read this Dcb for error recovery.
1638 //
1639
1640 FinalDcb = ParentDcb;
1641
1642 //
1643 // If the remaining part is now empty then this is the last name
1644 // in the string and the one we want to open
1645 //
1646
1647 if (RemainingPart.Length == 0) {
1648
1649
1650 break;
1651 }
1652
1653 //
1654 // We didn't find a dirent, bail.
1655 //
1656
1657 if (Dirent == NULL) {
1658
1659 Iosb.Status = STATUS_OBJECT_PATH_NOT_FOUND;
1660 try_return( Iosb.Status );
1661 }
1662
1663 //
1664 // We now have a dirent, make sure it is a directory
1665 //
1666
1667 if (!FlagOn( Dirent->Attributes, FAT_DIRENT_ATTR_DIRECTORY )) {
1668
1669 Iosb.Status = STATUS_OBJECT_PATH_NOT_FOUND;
1670 try_return( Iosb.Status );
1671 }
1672
1673 //
1674 // Compute the LfnByteOffset.
1675 //
1676
1677 LfnByteOffset = DirentByteOffset -
1678 FAT_LFN_DIRENTS_NEEDED(&OrigLfn) * sizeof(LFN_DIRENT);
1679
1680 //
1681 // Create a dcb for the new directory
1682 //
1683
1684 ParentDcb = FatCreateDcb( IrpContext,
1685 Vcb,
1686 ParentDcb,
1687 LfnByteOffset,
1688 DirentByteOffset,
1689 Dirent,
1690 &Lfn );
1691
1692 //
1693 // Remember we created this Dcb for error recovery.
1694 //
1695
1696 FinalDcb = ParentDcb;
1697
1698 FatSetFullNameInFcb( IrpContext, ParentDcb, &FinalName );
1699 }
1700
1701 //
1702 // First check if the user wanted to open the target directory
1703 // and if so then call the subroutine to finish the open.
1704 //
1705
1706 if (OpenTargetDirectory) {
1707
1708 Iosb = FatOpenTargetDirectory( IrpContext,
1709 FileObject,
1710 ParentDcb,
1711 DesiredAccess,
1712 ShareAccess,
1713 Dirent ? TRUE : FALSE,
1714 FileNameOpenedDos);
1715
1716 Irp->IoStatus.Information = Iosb.Information;
1717 try_return( Iosb.Status );
1718 }
1719
1720 if (Dirent != NULL) {
1721
1722 //
1723 // Compute the LfnByteOffset.
1724 //
1725
1726 LfnByteOffset = DirentByteOffset -
1727 FAT_LFN_DIRENTS_NEEDED(&OrigLfn) * sizeof(LFN_DIRENT);
1728
1729 //
1730 // We were able to locate an existing dirent entry, so now
1731 // see if it is a directory that we're trying to open.
1732 //
1733
1734 if (FlagOn( Dirent->Attributes, FAT_DIRENT_ATTR_DIRECTORY )) {
1735
1736 //
1737 // Make sure its okay to open a directory
1738 //
1739
1740 if (NonDirectoryFile) {
1741
1742 DebugTrace(0, Dbg, "Cannot open directory as a file\n", 0);
1743
1744 try_return( Iosb.Status = STATUS_FILE_IS_A_DIRECTORY );
1745 }
1746
1747 DebugTrace(0, Dbg, "Open existing directory\n", 0);
1748
1749 Iosb = FatOpenExistingDirectory( IrpContext,
1750 IrpSp,
1751 FileObject,
1752 Vcb,
1753 &Fcb,
1754 ParentDcb,
1755 Dirent,
1756 LfnByteOffset,
1757 DirentByteOffset,
1758 &Lfn,
1759 DesiredAccess,
1760 ShareAccess,
1761 CreateDisposition,
1762 NoEaKnowledge,
1763 DeleteOnClose,
1764 FileNameOpenedDos,
1765 OpenRequiringOplock );
1766
1767 Irp->IoStatus.Information = Iosb.Information;
1768 try_return( Iosb.Status );
1769 }
1770
1771 //
1772 // Otherwise we're trying to open and existing file, and we
1773 // need to check if the user only wanted to open a directory.
1774 //
1775
1776 if (OpenDirectory) {
1777
1778 DebugTrace(0, Dbg, "Cannot open file as directory\n", 0);
1779
1780 try_return( Iosb.Status = STATUS_NOT_A_DIRECTORY );
1781 }
1782
1783 DebugTrace(0, Dbg, "Open existing file\n", 0);
1784
1785 if ( TrailingBackslash ) {
1786 try_return( Iosb.Status = STATUS_OBJECT_NAME_INVALID );
1787 }
1788
1789
1790 Iosb = FatOpenExistingFile( IrpContext,
1791 FileObject,
1792 Vcb,
1793 &Fcb,
1794 ParentDcb,
1795 Dirent,
1796 LfnByteOffset,
1797 DirentByteOffset,
1798 &Lfn,
1799 &OrigLfn,
1800 DesiredAccess,
1801 ShareAccess,
1802 AllocationSize,
1803 EaBuffer,
1804 EaLength,
1805 FileAttributes,
1806 CreateDisposition,
1807 IsPagingFile,
1808 NoEaKnowledge,
1809 DeleteOnClose,
1810 OpenRequiringOplock,
1811 FileNameOpenedDos );
1812
1813 //
1814 // Check if we need to set the cache support flag in
1815 // the file object
1816 //
1817
1818 if (NT_SUCCESS(Iosb.Status) && !NoIntermediateBuffering) {
1819
1820 FileObject->Flags |= FO_CACHE_SUPPORTED;
1821 }
1822
1823 Irp->IoStatus.Information = Iosb.Information;
1824 try_return( Iosb.Status );
1825 }
1826
1827 //
1828 // We can't locate a dirent so this is a new file.
1829 //
1830
1831 //
1832 // Now check to see if we wanted to only open an existing file.
1833 // And then case on whether we wanted to create a file or a directory.
1834 //
1835
1836 if ((CreateDisposition == FILE_OPEN) ||
1837 (CreateDisposition == FILE_OVERWRITE)) {
1838
1839 DebugTrace( 0, Dbg, "Cannot open nonexisting file\n", 0);
1840
1841 try_return( Iosb.Status = STATUS_OBJECT_NAME_NOT_FOUND );
1842 }
1843
1844 //
1845 // Skip a few cycles later if we know now that the Oem name is not
1846 // valid 8.3.
1847 //
1848
1849 if (FlagOn(LocalCcb.Flags, CCB_FLAG_SKIP_SHORT_NAME_COMPARE)) {
1850
1851 OemFinalName.Length = 0;
1852 }
1853
1854 //
1855 // Determine the granted access for this operation now.
1856 //
1857
1858 if (!NT_SUCCESS( Iosb.Status = FatCheckSystemSecurityAccess( IrpContext ))) {
1859
1860 try_return( Iosb );
1861 }
1862
1863 if (CreateDirectory) {
1864
1865 DebugTrace(0, Dbg, "Create new directory\n", 0);
1866
1867 //
1868 // If this media is write protected, don't even try the create.
1869 //
1870
1871 if (FlagOn(Vcb->VcbState, VCB_STATE_FLAG_WRITE_PROTECTED)) {
1872
1873 //
1874 // Set the real device for the pop-up info, and set the verify
1875 // bit in the device object, so that we will force a verify
1876 // in case the user put the correct media back in.
1877 //
1878
1879
1880 IoSetHardErrorOrVerifyDevice( IrpContext->OriginatingIrp,
1881 Vcb->Vpb->RealDevice );
1882
1883 SetFlag(Vcb->Vpb->RealDevice->Flags, DO_VERIFY_VOLUME);
1884
1885 FatRaiseStatus( IrpContext, STATUS_MEDIA_WRITE_PROTECTED );
1886 }
1887
1888 //
1889 // Don't allow people to create directories with the
1890 // temporary bit set.
1891 //
1892
1893 if (TemporaryFile) {
1894
1895 try_return( Iosb.Status = STATUS_INVALID_PARAMETER );
1896 }
1897
1898 Iosb = FatCreateNewDirectory( IrpContext,
1899 IrpSp,
1900 FileObject,
1901 Vcb,
1902 ParentDcb,
1903 &OemFinalName,
1904 &FinalName,
1905 DesiredAccess,
1906 ShareAccess,
1907 EaBuffer,
1908 EaLength,
1909 FileAttributes,
1910 NoEaKnowledge,
1911 DeleteOnClose,
1912 OpenRequiringOplock );
1913
1914 Irp->IoStatus.Information = Iosb.Information;
1915 try_return( Iosb.Status );
1916 }
1917
1918 DebugTrace(0, Dbg, "Create new file\n", 0);
1919
1920 if ( TrailingBackslash ) {
1921
1922 try_return( Iosb.Status = STATUS_OBJECT_NAME_INVALID );
1923 }
1924
1925 //
1926 // If this media is write protected, don't even try the create.
1927 //
1928
1929 if (FlagOn(Vcb->VcbState, VCB_STATE_FLAG_WRITE_PROTECTED)) {
1930
1931 //
1932 // Set the real device for the pop-up info, and set the verify
1933 // bit in the device object, so that we will force a verify
1934 // in case the user put the correct media back in.
1935 //
1936
1937
1938 IoSetHardErrorOrVerifyDevice( IrpContext->OriginatingIrp,
1939 Vcb->Vpb->RealDevice );
1940
1941 SetFlag(Vcb->Vpb->RealDevice->Flags, DO_VERIFY_VOLUME);
1942
1943 FatRaiseStatus( IrpContext, STATUS_MEDIA_WRITE_PROTECTED );
1944 }
1945
1946
1947 Iosb = FatCreateNewFile( IrpContext,
1948 IrpSp,
1949 FileObject,
1950 Vcb,
1951 ParentDcb,
1952 &OemFinalName,
1953 &FinalName,
1954 DesiredAccess,
1955 ShareAccess,
1956 AllocationSize,
1957 EaBuffer,
1958 EaLength,
1959 FileAttributes,
1960 &Lfn,
1961 IsPagingFile,
1962 NoEaKnowledge,
1963 DeleteOnClose,
1964 OpenRequiringOplock,
1965 TemporaryFile );
1966
1967 //
1968 // Check if we need to set the cache support flag in
1969 // the file object
1970 //
1971
1972 if (NT_SUCCESS(Iosb.Status) && !NoIntermediateBuffering) {
1973
1974 FileObject->Flags |= FO_CACHE_SUPPORTED;
1975 }
1976
1977 Irp->IoStatus.Information = Iosb.Information;
1978
1979 try_exit: NOTHING;
1980
1981 //
1982 // This is a Beta Fix. Do this at a better place later.
1983 //
1984
1985 if (NT_SUCCESS(Iosb.Status) && !OpenTargetDirectory) {
1986
1987 PFCB LocalFcb;
1988
1989 //
1990 // If there is an Fcb/Dcb, set the long file name.
1991 //
1992
1993 LocalFcb = FileObject->FsContext;
1994
1995 if (LocalFcb &&
1996 ((NodeType(LocalFcb) == FAT_NTC_FCB) ||
1997 (NodeType(LocalFcb) == FAT_NTC_DCB)) &&
1998 (LocalFcb->FullFileName.Buffer == NULL)) {
1999
2000 FatSetFullNameInFcb( IrpContext, LocalFcb, &FinalName );
2001 }
2002 }
2003
2004 } _SEH2_FINALLY {
2005
2006 DebugUnwind( FatCommonCreate );
2007
2008#if (NTDDI_VERSION >= NTDDI_WIN7)
2009
2010 //
2011 // If we're not getting out with success, and if the caller wanted
2012 // atomic create-with-oplock semantics make sure we back out any
2013 // oplock that may have been granted.
2014 //
2015
2016 if ((AbnormalTermination() ||
2017 !NT_SUCCESS( Iosb.Status )) &&
2018 OpenRequiringOplock &&
2019 (Iosb.Status != STATUS_CANNOT_BREAK_OPLOCK) &&
2020 (IrpContext->ExceptionStatus != STATUS_CANNOT_BREAK_OPLOCK) &&
2021 (Fcb != NULL) &&
2022 FatIsFileOplockable( Fcb )) {
2023
2024 FsRtlCheckOplockEx( FatGetFcbOplock(Fcb),
2025 IrpContext->OriginatingIrp,
2026 OPLOCK_FLAG_BACK_OUT_ATOMIC_OPLOCK,
2027 NULL,
2028 NULL,
2029 NULL );
2030 }
2031#endif
2032
2033 //
2034 // There used to be a test here - the ASSERT replaces it. We will
2035 // never have begun enumerating directories if we post the IRP for
2036 // oplock reasons.
2037 //
2038
2039 NT_ASSERT( !OplockPostIrp || DirentBcb == NULL );
2040
2041 FatUnpinBcb( IrpContext, DirentBcb );
2042
2043 //
2044 // If we are in an error path, check for any created subdir Dcbs that
2045 // have to be unwound. Don't whack the root directory.
2046 //
2047 // Note this will leave a branch of Dcbs dangling if the directory file
2048 // had not been built on the leaf (case: opening path which has an
2049 // element containing an invalid character name).
2050 //
2051
2052 if (_SEH2_AbnormalTermination() || !NT_SUCCESS(Iosb.Status)) {
2053
2054 ULONG SavedFlags;
2055
2056 //
2057 // Before doing the uninitialize, we have to unpin anything
2058 // that has been repinned, but disable writethrough first. We
2059 // disable raise from unpin-repin since we're already failing.
2060 //
2061
2062 SavedFlags = IrpContext->Flags;
2063
2064 SetFlag( IrpContext->Flags, IRP_CONTEXT_FLAG_DISABLE_RAISE |
2065 IRP_CONTEXT_FLAG_DISABLE_WRITE_THROUGH );
2066
2067 FatUnpinRepinnedBcbs( IrpContext );
2068
2069 if ((FinalDcb != NULL) &&
2070 (NodeType(FinalDcb) == FAT_NTC_DCB) &&
2071 IsListEmpty(&FinalDcb->Specific.Dcb.ParentDcbQueue) &&
2072 (FinalDcb->OpenCount == 0) &&
2073 (FinalDcb->Specific.Dcb.DirectoryFile != NULL)) {
2074
2075 PFILE_OBJECT DirectoryFileObject;
2076
2077 DirectoryFileObject = FinalDcb->Specific.Dcb.DirectoryFile;
2078
2079 FinalDcb->Specific.Dcb.DirectoryFile = NULL;
2080
2081 CcUninitializeCacheMap( DirectoryFileObject, NULL, NULL );
2082
2083 ObDereferenceObject( DirectoryFileObject );
2084 }
2085
2086 IrpContext->Flags = SavedFlags;
2087 }
2088
2089 if (_SEH2_AbnormalTermination()) {
2090
2091 FatReleaseVcb( IrpContext, Vcb );
2092 }
2093
2094 //
2095 // Free up any string buffers we allocated
2096 //
2097
2098 FatFreeStringBuffer( &OemFinalName);
2099
2100 FatFreeStringBuffer( &UpcasedFinalName);
2101
2102 FatFreeStringBuffer( &Lfn);
2103 } _SEH2_END;
2104
2105 //
2106 // The following code is only executed if we are exiting the
2107 // procedure through a normal termination. We complete the request
2108 // and if for any reason that bombs out then we need to unreference
2109 // and possibly delete the fcb and ccb.
2110 //
2111
2112 _SEH2_TRY {
2113
2114 if (PostIrp) {
2115
2116 //
2117 // If the Irp hasn't already been posted, do it now.
2118 //
2119
2120 if (!OplockPostIrp) {
2121
2122 Iosb.Status = FatFsdPostRequest( IrpContext, Irp );
2123 }
2124
2125 } else {
2126
2127 FatUnpinRepinnedBcbs( IrpContext );
2128 }
2129
2130 } _SEH2_FINALLY {
2131
2132 DebugUnwind( FatCommonCreate-in-FatCompleteRequest );
2133
2134 if (_SEH2_AbnormalTermination() ) {
2135
2136 PVCB LocalVcb;
2137 PFCB LocalFcb;
2138 PCCB LocalCcb2;
2139 PFILE_OBJECT DirectoryFileObject;
2140
2141 //
2142 // Unwind all of our counts. Note that if a write failed, then
2143 // the volume has been marked for verify, and all volume
2144 // structures will be cleaned up automatically.
2145 //
2146
2147 (VOID) FatDecodeFileObject( FileObject, &LocalVcb, &LocalFcb, &LocalCcb2 );
2148
2149 LocalFcb->UncleanCount -= 1;
2150 LocalFcb->OpenCount -= 1;
2151 LocalVcb->OpenFileCount -= 1;
2152
2153 if (IsFileObjectReadOnly(FileObject)) { LocalVcb->ReadOnlyCount -= 1; }
2154
2155
2156 //
2157 // WinSE #307418 "Occasional data corruption when standby/resume
2158 // while copying files to removable FAT formatted media".
2159 // If new file creation request was interrupted by system suspend
2160 // operation we should revert the changes we made to the parent
2161 // directory and to the allocation table.
2162 //
2163
2164 if (IrpContext->ExceptionStatus == STATUS_VERIFY_REQUIRED &&
2165 NodeType( LocalFcb ) == FAT_NTC_FCB) {
2166
2167 FatTruncateFileAllocation( IrpContext, LocalFcb, 0 );
2168
2169 FatDeleteDirent( IrpContext, LocalFcb, NULL, TRUE );
2170 }
2171
2172 //
2173 // If we leafed out on a new Fcb we should get rid of it at this point.
2174 //
2175 // Since the object isn't being opened, we have to do all of the teardown
2176 // here. Our close path will not occur for this fileobject. Note this
2177 // will leave a branch of Dcbs dangling since we do it by hand and don't
2178 // chase to the root.
2179 //
2180
2181 if (LocalFcb->OpenCount == 0 &&
2182 (NodeType( LocalFcb ) == FAT_NTC_FCB ||
2183 IsListEmpty(&LocalFcb->Specific.Dcb.ParentDcbQueue))) {
2184
2185 NT_ASSERT( NodeType( LocalFcb ) != FAT_NTC_ROOT_DCB );
2186
2187 if ( (NodeType( LocalFcb ) == FAT_NTC_DCB) &&
2188 (LocalFcb->Specific.Dcb.DirectoryFile != NULL) ) {
2189
2190 DirectoryFileObject = LocalFcb->Specific.Dcb.DirectoryFile;
2191 LocalFcb->Specific.Dcb.DirectoryFile = NULL;
2192
2193 CcUninitializeCacheMap( DirectoryFileObject,
2194 &FatLargeZero,
2195 NULL );
2196
2197 ObDereferenceObject( DirectoryFileObject );
2198
2199 } else {
2200 if (ARGUMENT_PRESENT( FileObject )) {
2201 FileObject->SectionObjectPointer = NULL;
2202 }
2203 FatDeleteFcb( IrpContext, &LocalFcb );
2204 }
2205 }
2206
2207 FatDeleteCcb( IrpContext, &LocalCcb2 );
2208
2209 FatReleaseVcb( IrpContext, LocalVcb );
2210
2211 } else {
2212
2213 FatReleaseVcb( IrpContext, Vcb );
2214
2215 if ( !PostIrp ) {
2216
2217 //
2218 // If this request is successful and the file was opened
2219 // for FILE_EXECUTE access, then set the FileObject bit.
2220 //
2221
2222 NT_ASSERT( IrpSp->Parameters.Create.SecurityContext != NULL );
2223 if (FlagOn( *DesiredAccess, FILE_EXECUTE )) {
2224
2225 SetFlag( FileObject->Flags, FO_FILE_FAST_IO_READ );
2226 }
2227
2228 //
2229 // Lock volume in drive if we opened a paging file, allocating a
2230 // reserve MDL to guarantee paging file operations can always
2231 // go forward.
2232 //
2233
2234 if (IsPagingFile && NT_SUCCESS(Iosb.Status)) {
2235
2236#ifdef _MSC_VER
2237#pragma prefast( suppress:28112, "this should be safe" )
2238#endif
2239 if (!FatReserveMdl) {
2240
2241 PMDL ReserveMdl = IoAllocateMdl( NULL,
2242 FAT_RESERVE_MDL_SIZE * PAGE_SIZE,
2243 TRUE,
2244 FALSE,
2245 NULL );
2246
2247 //
2248 // Stash the MDL, and if it turned out there was already one there
2249 // just free what we got.
2250 //
2251
2252#ifndef __REACTOS__
2253 InterlockedCompareExchangePointer( &FatReserveMdl, ReserveMdl, NULL );
2254#else
2255 InterlockedCompareExchangePointer( (void * volatile*)&FatReserveMdl, ReserveMdl, NULL );
2256#endif
2257
2258#ifdef _MSC_VER
2259#pragma prefast( suppress:28112, "this should be safe" )
2260#endif
2261 if (FatReserveMdl != ReserveMdl) {
2262
2263 IoFreeMdl( ReserveMdl );
2264 }
2265 }
2266
2267 SetFlag(Vcb->VcbState, VCB_STATE_FLAG_BOOT_OR_PAGING_FILE);
2268
2269 if (FlagOn(Vcb->VcbState, VCB_STATE_FLAG_REMOVABLE_MEDIA)) {
2270
2271 FatToggleMediaEjectDisable( IrpContext, Vcb, TRUE );
2272 }
2273 }
2274
2275 }
2276 }
2277
2278 DebugTrace(-1, Dbg, "FatCommonCreate -> %08lx\n", Iosb.Status);
2279 } _SEH2_END;
2280
2281 CollectCreateStatistics(Vcb, Iosb.Status);
2282
2283 return Iosb.Status;
2284}
2285
2286//
2287// Internal support routine
2288//
2289
2290_Requires_lock_held_(_Global_critical_region_)
2291IO_STATUS_BLOCK
2292FatOpenVolume (
2293 _In_ PIRP_CONTEXT IrpContext,
2294 _Inout_ PFILE_OBJECT FileObject,
2295 _Inout_ PVCB Vcb,
2296 _In_ PACCESS_MASK DesiredAccess,
2297 _In_ USHORT ShareAccess,
2298 _In_ ULONG CreateDisposition
2299 )
2300
2301/*++
2302
2303Routine Description:
2304
2305 This routine opens the specified volume for DASD access
2306
2307Arguments:
2308
2309 FileObject - Supplies the File object
2310
2311 Vcb - Supplies the Vcb denoting the volume being opened
2312
2313 DesiredAccess - Supplies the desired access of the caller
2314
2315 ShareAccess - Supplies the share access of the caller
2316
2317 CreateDisposition - Supplies the create disposition for this operation
2318
2319Return Value:
2320
2321 IO_STATUS_BLOCK - Returns the completion status for the operation
2322
2323--*/
2324
2325{
2326 NTSTATUS Status;
2327 PIO_STACK_LOCATION IrpSp;
2328
2329#ifndef __REACTOS__
2330 IO_STATUS_BLOCK Iosb = {0,0};
2331#else
2332 IO_STATUS_BLOCK Iosb = {{0}};
2333#endif
2334
2335 BOOLEAN CleanedVolume = FALSE;
2336
2337 //
2338 // The following variables are for abnormal termination
2339 //
2340
2341 BOOLEAN UnwindShareAccess = FALSE;
2342 PCCB UnwindCcb = NULL;
2343 BOOLEAN UnwindCounts = FALSE;
2344 BOOLEAN UnwindVolumeLock = FALSE;
2345
2346 PAGED_CODE();
2347
2348 DebugTrace(+1, Dbg, "FatOpenVolume...\n", 0);
2349
2350 _SEH2_TRY {
2351
2352 //
2353 // Check for proper desired access and rights
2354 //
2355
2356 if ((CreateDisposition != FILE_OPEN) &&
2357 (CreateDisposition != FILE_OPEN_IF)) {
2358
2359 try_return( Status = STATUS_ACCESS_DENIED );
2360 }
2361
2362 //
2363 // If the user does not want to share write or delete then we will try
2364 // and take out a lock on the volume.
2365 //
2366
2367 if (!FlagOn(ShareAccess, FILE_SHARE_WRITE) &&
2368 !FlagOn(ShareAccess, FILE_SHARE_DELETE)) {
2369
2370#if (NTDDI_VERSION >= NTDDI_VISTA)
2371 //
2372 // See if the user has requested write access. If so, they cannot share
2373 // read. There is one exception to this. We allow autochk to get an
2374 // implicit lock on the volume while still allowing readers. Once the
2375 // the system is booted, though, we do not allow this type of access.
2376 //
2377
2378 if (FlagOn( *DesiredAccess, (FILE_WRITE_DATA | FILE_APPEND_DATA) ) &&
2379 FsRtlAreVolumeStartupApplicationsComplete()) {
2380
2381 ClearFlag( ShareAccess, FILE_SHARE_READ );
2382 }
2383#endif
2384
2385 //
2386 // Do a quick check here for handles on exclusive open.
2387 //
2388
2389 if (!FlagOn(ShareAccess, FILE_SHARE_READ) &&
2390 !FatIsHandleCountZero( IrpContext, Vcb )) {
2391
2392 try_return( Status = STATUS_SHARING_VIOLATION );
2393 }
2394
2395 //
2396 // Force Mm to get rid of its referenced file objects.
2397 //
2398
2399 FatFlushFat( IrpContext, Vcb );
2400
2401 FatPurgeReferencedFileObjects( IrpContext, Vcb->RootDcb, Flush );
2402
2403 //
2404 // If the user also does not want to share read then we check
2405 // if anyone is already using the volume, and if so then we
2406 // deny the access. If the user wants to share read then
2407 // we allow the current opens to stay provided they are only
2408 // readonly opens and deny further opens.
2409 //
2410
2411 if (!FlagOn(ShareAccess, FILE_SHARE_READ)) {
2412
2413 if (Vcb->OpenFileCount != 0) {
2414
2415 try_return( Status = STATUS_SHARING_VIOLATION );
2416 }
2417
2418 } else {
2419
2420 if (Vcb->ReadOnlyCount != Vcb->OpenFileCount) {
2421
2422 try_return( Status = STATUS_SHARING_VIOLATION );
2423 }
2424 }
2425
2426 //
2427 // Lock the volume
2428 //
2429
2430 Vcb->VcbState |= VCB_STATE_FLAG_LOCKED;
2431 Vcb->FileObjectWithVcbLocked = FileObject;
2432 UnwindVolumeLock = TRUE;
2433
2434 //
2435 // Clean the volume
2436 //
2437
2438 CleanedVolume = TRUE;
2439
2440 } else if (FlagOn( *DesiredAccess, FILE_READ_DATA | FILE_WRITE_DATA | FILE_APPEND_DATA )) {
2441
2442 //
2443 // Flush the volume and let ourselves push the clean bit out if everything
2444 // worked.
2445 //
2446
2447 if (NT_SUCCESS( FatFlushVolume( IrpContext, Vcb, Flush ))) {
2448
2449 CleanedVolume = TRUE;
2450 }
2451 }
2452
2453 //
2454 // Clean the volume if we believe it safe and reasonable.
2455 //
2456
2457 if (CleanedVolume &&
2458 FlagOn( Vcb->VcbState, VCB_STATE_FLAG_VOLUME_DIRTY ) &&
2459 !FlagOn( Vcb->VcbState, VCB_STATE_FLAG_MOUNTED_DIRTY ) &&
2460 !CcIsThereDirtyData(Vcb->Vpb)) {
2461
2462 //
2463 // Cancel any pending clean volumes.
2464 //
2465
2466 (VOID)KeCancelTimer( &Vcb->CleanVolumeTimer );
2467 (VOID)KeRemoveQueueDpc( &Vcb->CleanVolumeDpc );
2468
2469 FatMarkVolume( IrpContext, Vcb, VolumeClean );
2470 ClearFlag( Vcb->VcbState, VCB_STATE_FLAG_VOLUME_DIRTY );
2471
2472 //
2473 // Unlock the volume if it is removable.
2474 //
2475
2476 if (FlagOn(Vcb->VcbState, VCB_STATE_FLAG_REMOVABLE_MEDIA) &&
2477 !FlagOn(Vcb->VcbState, VCB_STATE_FLAG_BOOT_OR_PAGING_FILE)) {
2478
2479 FatToggleMediaEjectDisable( IrpContext, Vcb, FALSE );
2480 }
2481 }
2482
2483 //
2484 // If the volume is already opened by someone then we need to check
2485 // the share access
2486 //
2487
2488 if (Vcb->DirectAccessOpenCount > 0) {
2489
2490 if (!NT_SUCCESS(Status = IoCheckShareAccess( *DesiredAccess,
2491 ShareAccess,
2492 FileObject,
2493 &Vcb->ShareAccess,
2494 TRUE ))) {
2495
2496 try_return( NOTHING );
2497 }
2498
2499 } else {
2500
2501 IoSetShareAccess( *DesiredAccess,
2502 ShareAccess,
2503 FileObject,
2504 &Vcb->ShareAccess );
2505 }
2506
2507 UnwindShareAccess = TRUE;
2508
2509 //
2510 // Set up the context and section object pointers, and update
2511 // our reference counts
2512 //
2513
2514 FatSetFileObject( FileObject,
2515 UserVolumeOpen,
2516 Vcb,
2517 UnwindCcb = FatCreateCcb( IrpContext ));
2518
2519 FileObject->SectionObjectPointer = &Vcb->SectionObjectPointers;
2520
2521 Vcb->DirectAccessOpenCount += 1;
2522 Vcb->OpenFileCount += 1;
2523 if (IsFileObjectReadOnly(FileObject)) { Vcb->ReadOnlyCount += 1; }
2524 UnwindCounts = TRUE;
2525 FileObject->Flags |= FO_NO_INTERMEDIATE_BUFFERING;
2526
2527 //
2528 // At this point the open will succeed, so check if the user is getting explicit access
2529 // to the device. If not, we will note this so we can deny modifying FSCTL to it.
2530 //
2531
2532 IrpSp = IoGetCurrentIrpStackLocation( IrpContext->OriginatingIrp );
2533 Status = FatExplicitDeviceAccessGranted( IrpContext,
2534 Vcb->Vpb->RealDevice,
2535 IrpSp->Parameters.Create.SecurityContext->AccessState,
2536 (KPROCESSOR_MODE)( FlagOn( IrpSp->Flags, SL_FORCE_ACCESS_CHECK ) ?
2537 UserMode :
2538 IrpContext->OriginatingIrp->RequestorMode ));
2539
2540 if (NT_SUCCESS( Status )) {
2541
2542 SetFlag( UnwindCcb->Flags, CCB_FLAG_MANAGE_VOLUME_ACCESS );
2543 }
2544
2545 //
2546 // And set our status to success
2547 //
2548
2549 Status = STATUS_SUCCESS;
2550 Iosb.Information = FILE_OPENED;
2551
2552 try_exit: NOTHING;
2553 } _SEH2_FINALLY {
2554
2555 DebugUnwind( FatOpenVolume );
2556
2557 //
2558 // If this is an abnormal termination then undo our work
2559 //
2560
2561 if (_SEH2_AbnormalTermination() || !NT_SUCCESS(Status)) {
2562
2563 if (UnwindCounts) {
2564 Vcb->DirectAccessOpenCount -= 1;
2565 Vcb->OpenFileCount -= 1;
2566 if (IsFileObjectReadOnly(FileObject)) { Vcb->ReadOnlyCount -= 1; }
2567 }
2568 if (UnwindCcb != NULL) { FatDeleteCcb( IrpContext, &UnwindCcb ); }
2569 if (UnwindShareAccess) { IoRemoveShareAccess( FileObject, &Vcb->ShareAccess ); }
2570 if (UnwindVolumeLock) { Vcb->VcbState &= ~VCB_STATE_FLAG_LOCKED; }
2571 }
2572
2573 DebugTrace(-1, Dbg, "FatOpenVolume -> Iosb.Status = %08lx\n", Status);
2574 } _SEH2_END;
2575
2576 Iosb.Status = Status;
2577 return Iosb;
2578}
2579
2580
2581//
2582// Internal support routine
2583//
2584
2585_Requires_lock_held_(_Global_critical_region_)
2586IO_STATUS_BLOCK
2587FatOpenRootDcb (
2588 _In_ PIRP_CONTEXT IrpContext,
2589 _Inout_ PFILE_OBJECT FileObject,
2590 _Inout_ PVCB Vcb,
2591 _In_ PACCESS_MASK DesiredAccess,
2592 _In_ USHORT ShareAccess,
2593 _In_ ULONG CreateDisposition
2594 )
2595
2596/*++
2597
2598Routine Description:
2599
2600 This routine opens the root dcb for the volume
2601
2602Arguments:
2603
2604 FileObject - Supplies the File object
2605
2606 Vcb - Supplies the Vcb denoting the volume whose dcb is being opened.
2607
2608 DesiredAccess - Supplies the desired access of the caller
2609
2610 ShareAccess - Supplies the share access of the caller
2611
2612 CreateDisposition - Supplies the create disposition for this operation
2613
2614Return Value:
2615
2616 IO_STATUS_BLOCK - Returns the completion status for the operation
2617
2618Arguments:
2619
2620--*/
2621
2622{
2623 PDCB RootDcb;
2624 IO_STATUS_BLOCK Iosb = {0};
2625
2626 //
2627 // The following variables are for abnormal termination
2628 //
2629
2630 BOOLEAN UnwindShareAccess = FALSE;
2631 PCCB UnwindCcb = NULL;
2632 BOOLEAN UnwindCounts = FALSE;
2633 BOOLEAN RootDcbAcquired = FALSE;
2634
2635 PAGED_CODE();
2636
2637 DebugTrace(+1, Dbg, "FatOpenRootDcb...\n", 0);
2638
2639 //
2640 // Locate the root dcb
2641 //
2642
2643 RootDcb = Vcb->RootDcb;
2644
2645 //
2646 // Get the Dcb exlcusive. This is important as cleanup does not
2647 // acquire the Vcb.
2648 //
2649
2650 (VOID)FatAcquireExclusiveFcb( IrpContext, RootDcb );
2651 RootDcbAcquired = TRUE;
2652
2653 _SEH2_TRY {
2654
2655 //
2656 // Check the create disposition and desired access
2657 //
2658
2659 if ((CreateDisposition != FILE_OPEN) &&
2660 (CreateDisposition != FILE_OPEN_IF)) {
2661
2662 Iosb.Status = STATUS_ACCESS_DENIED;
2663 try_return( Iosb );
2664 }
2665
2666 if (!FatCheckFileAccess( IrpContext,
2667 RootDcb->DirentFatFlags,
2668 DesiredAccess)) {
2669
2670 Iosb.Status = STATUS_ACCESS_DENIED;
2671 try_return( Iosb );
2672 }
2673
2674 //
2675 // If the Root dcb is already opened by someone then we need
2676 // to check the share access
2677 //
2678
2679 if (RootDcb->OpenCount > 0) {
2680
2681 if (!NT_SUCCESS(Iosb.Status = IoCheckShareAccess( *DesiredAccess,
2682 ShareAccess,
2683 FileObject,
2684 &RootDcb->ShareAccess,
2685 TRUE ))) {
2686
2687 try_return( Iosb );
2688 }
2689
2690 } else {
2691
2692 IoSetShareAccess( *DesiredAccess,
2693 ShareAccess,
2694 FileObject,
2695 &RootDcb->ShareAccess );
2696 }
2697
2698 UnwindShareAccess = TRUE;
2699
2700 //
2701 // Setup the context and section object pointers, and update
2702 // our reference counts
2703 //
2704
2705 FatSetFileObject( FileObject,
2706 UserDirectoryOpen,
2707 RootDcb,
2708 UnwindCcb = FatCreateCcb( IrpContext ));
2709
2710 RootDcb->UncleanCount += 1;
2711 RootDcb->OpenCount += 1;
2712 Vcb->OpenFileCount += 1;
2713 if (IsFileObjectReadOnly(FileObject)) { Vcb->ReadOnlyCount += 1; }
2714 UnwindCounts = TRUE;
2715
2716 //
2717 // And set our status to success
2718 //
2719
2720 Iosb.Status = STATUS_SUCCESS;
2721 Iosb.Information = FILE_OPENED;
2722
2723 try_exit: NOTHING;
2724 } _SEH2_FINALLY {
2725
2726 DebugUnwind( FatOpenRootDcb );
2727
2728 //
2729 // If this is an abnormal termination then undo our work
2730 //
2731
2732 if (_SEH2_AbnormalTermination()) {
2733
2734 if (UnwindCounts) {
2735 RootDcb->UncleanCount -= 1;
2736 RootDcb->OpenCount -= 1;
2737 Vcb->OpenFileCount -= 1;
2738 if (IsFileObjectReadOnly(FileObject)) { Vcb->ReadOnlyCount -= 1; }
2739 }
2740 if (UnwindCcb != NULL) { FatDeleteCcb( IrpContext, &UnwindCcb ); }
2741 if (UnwindShareAccess) { IoRemoveShareAccess( FileObject, &RootDcb->ShareAccess ); }
2742 }
2743
2744 if (RootDcbAcquired) {
2745
2746 FatReleaseFcb( IrpContext, RootDcb );
2747 }
2748
2749 DebugTrace(-1, Dbg, "FatOpenRootDcb -> Iosb.Status = %08lx\n", Iosb.Status);
2750 } _SEH2_END;
2751
2752 return Iosb;
2753}
2754
2755
2756//
2757// Internal support routine
2758//
2759
2760_Requires_lock_held_(_Global_critical_region_)
2761IO_STATUS_BLOCK
2762FatOpenExistingDcb (
2763 _In_ PIRP_CONTEXT IrpContext,
2764 _In_ PIO_STACK_LOCATION IrpSp,
2765 _Inout_ PFILE_OBJECT FileObject,
2766 _Inout_ PVCB Vcb,
2767 _Inout_ PDCB Dcb,
2768 _In_ PACCESS_MASK DesiredAccess,
2769 _In_ USHORT ShareAccess,
2770 _In_ ULONG CreateDisposition,
2771 _In_ BOOLEAN NoEaKnowledge,
2772 _In_ BOOLEAN DeleteOnClose,
2773 _In_ BOOLEAN OpenRequiringOplock,
2774 _In_ BOOLEAN FileNameOpenedDos,
2775 _Out_ PBOOLEAN OplockPostIrp
2776 )
2777
2778/*++
2779
2780Routine Description:
2781
2782 This routine opens the specified existing dcb
2783
2784Arguments:
2785
2786 FileObject - Supplies the File object
2787
2788 Vcb - Supplies the Vcb denoting the volume containing the dcb
2789
2790 Dcb - Supplies the already existing dcb
2791
2792 DesiredAccess - Supplies the desired access of the caller
2793
2794 ShareAccess - Supplies the share access of the caller
2795
2796 CreateDisposition - Supplies the create disposition for this operation
2797
2798 NoEaKnowledge - This opener doesn't understand Ea's and we fail this
2799 open if the file has NeedEa's.
2800
2801 DeleteOnClose - The caller wants the file gone when the handle is closed
2802
2803Return Value:
2804
2805 IO_STATUS_BLOCK - Returns the completion status for the operation
2806
2807--*/
2808
2809{
2810 IO_STATUS_BLOCK Iosb = {0};
2811 PBCB DirentBcb = NULL;
2812 PDIRENT Dirent;
2813
2814 //
2815 // The following variables are for abnormal termination
2816 //
2817
2818 BOOLEAN UnwindShareAccess = FALSE;
2819 PCCB UnwindCcb = NULL;
2820 BOOLEAN DcbAcquired = FALSE;
2821
2822#if (NTDDI_VERSION <= NTDDI_WIN7)
2823 UNREFERENCED_PARAMETER( OpenRequiringOplock );
2824#endif
2825
2826 UNREFERENCED_PARAMETER( IrpSp );
2827
2828 PAGED_CODE();
2829
2830 DebugTrace(+1, Dbg, "FatOpenExistingDcb...\n", 0);
2831
2832 //
2833 // Get the Dcb exlcusive. This is important as cleanup does not
2834 // acquire the Vcb.
2835 //
2836
2837 (VOID)FatAcquireExclusiveFcb( IrpContext, Dcb );
2838 DcbAcquired = TRUE;
2839
2840 _SEH2_TRY {
2841
2842
2843 *OplockPostIrp = FALSE;
2844
2845 //
2846 // Before spending any noticeable effort, see if we have the odd case
2847 // of someone trying to delete-on-close the root dcb. This will only
2848 // happen if we're hit with a null-filename relative open via the root.
2849 //
2850
2851 if (NodeType(Dcb) == FAT_NTC_ROOT_DCB && DeleteOnClose) {
2852
2853 Iosb.Status = STATUS_CANNOT_DELETE;
2854 try_return( Iosb );
2855 }
2856
2857#if (NTDDI_VERSION >= NTDDI_WIN8)
2858
2859 //
2860 // Let's make sure that if the caller provided an oplock key that it
2861 // gets stored in the file object.
2862 //
2863
2864 Iosb.Status = FsRtlCheckOplockEx( FatGetFcbOplock(Dcb),
2865 IrpContext->OriginatingIrp,
2866 OPLOCK_FLAG_OPLOCK_KEY_CHECK_ONLY,
2867 NULL,
2868 NULL,
2869 NULL );
2870
2871 if (Iosb.Status != STATUS_SUCCESS) {
2872
2873 try_return( NOTHING );
2874 }
2875
2876#endif
2877 //
2878 // If the caller has no Ea knowledge, we immediately check for
2879 // Need Ea's on the file. We don't need to check for ea's on the
2880 // root directory, because it never has any. Fat32 doesn't have
2881 // any, either.
2882 //
2883
2884 if (NoEaKnowledge && NodeType(Dcb) != FAT_NTC_ROOT_DCB &&
2885 !FatIsFat32(Vcb)) {
2886
2887 ULONG NeedEaCount;
2888
2889 //
2890 // Get the dirent for the file and then check that the need
2891 // ea count is 0.
2892 //
2893
2894 FatGetDirentFromFcbOrDcb( IrpContext,
2895 Dcb,
2896 FALSE,
2897 &Dirent,
2898 &DirentBcb );
2899
2900 FatGetNeedEaCount( IrpContext,
2901 Vcb,
2902 Dirent,
2903 &NeedEaCount );
2904
2905 FatUnpinBcb( IrpContext, DirentBcb );
2906
2907 if (NeedEaCount != 0) {
2908
2909 Iosb.Status = STATUS_ACCESS_DENIED;
2910 try_return( Iosb );
2911 }
2912 }
2913
2914 //
2915 // Check the create disposition and desired access
2916 //
2917
2918 if ((CreateDisposition != FILE_OPEN) &&
2919 (CreateDisposition != FILE_OPEN_IF)) {
2920
2921 Iosb.Status = STATUS_OBJECT_NAME_COLLISION;
2922 try_return( Iosb );
2923 }
2924
2925 if (!FatCheckFileAccess( IrpContext,
2926 Dcb->DirentFatFlags,
2927 DesiredAccess)) {
2928
2929 Iosb.Status = STATUS_ACCESS_DENIED;
2930 try_return( Iosb );
2931 }
2932
2933 //
2934 // If the dcb is already opened by someone then we need
2935 // to check the share access
2936 //
2937
2938 if (Dcb->OpenCount > 0) {
2939
2940 if (!NT_SUCCESS(Iosb.Status = FatCheckShareAccess( IrpContext,
2941 FileObject,
2942 Dcb,
2943 DesiredAccess,
2944 ShareAccess ))) {
2945#if (NTDDI_VERSION >= NTDDI_WIN8)
2946
2947 NTSTATUS OplockBreakStatus = STATUS_SUCCESS;
2948
2949 //
2950 // If we got a sharing violation try to break outstanding handle
2951 // oplocks and retry the sharing check. If the caller specified
2952 // FILE_COMPLETE_IF_OPLOCKED we don't bother breaking the oplock;
2953 // we just return the sharing violation.
2954 //
2955
2956 if ((Iosb.Status == STATUS_SHARING_VIOLATION) &&
2957 !FlagOn( IrpSp->Parameters.Create.Options, FILE_COMPLETE_IF_OPLOCKED )) {
2958
2959 OplockBreakStatus = FsRtlOplockBreakH( FatGetFcbOplock(Dcb),
2960 IrpContext->OriginatingIrp,
2961 0,
2962 IrpContext,
2963 FatOplockComplete,
2964 FatPrePostIrp );
2965
2966 //
2967 // If FsRtlOplockBreakH returned STATUS_PENDING, then the IRP
2968 // has been posted and we need to stop working.
2969 //
2970
2971 if (OplockBreakStatus == STATUS_PENDING) {
2972
2973 Iosb.Status = STATUS_PENDING;
2974 *OplockPostIrp = TRUE;
2975 try_return( NOTHING );
2976
2977 //
2978 // If FsRtlOplockBreakH returned an error we want to return that now.
2979 //
2980
2981 } else if (!NT_SUCCESS( OplockBreakStatus )) {
2982
2983 Iosb.Status = OplockBreakStatus;
2984 try_return( Iosb );
2985
2986 //
2987 // Otherwise FsRtlOplockBreakH returned STATUS_SUCCESS, indicating
2988 // that there is no oplock to be broken. The sharing violation is
2989 // returned in that case.
2990 //
2991
2992 } else {
2993
2994 NT_ASSERT( OplockBreakStatus == STATUS_SUCCESS );
2995
2996 try_return( Iosb );
2997 }
2998
2999 //
3000 // The initial sharing check failed with something other than sharing
3001 // violation (which should never happen, but let's be future-proof),
3002 // or we *did* get a sharing violation and the caller specified
3003 // FILE_COMPLETE_IF_OPLOCKED. Either way this create is over.
3004 //
3005
3006 } else {
3007
3008 try_return( Iosb );
3009 }
3010#else
3011
3012 try_return( Iosb );
3013#endif
3014 }
3015 }
3016
3017#if (NTDDI_VERSION >= NTDDI_WIN8)
3018
3019 //
3020 // Now check that we can continue based on the oplock state of the
3021 // directory. If there are no open handles yet we don't need to do
3022 // this check; oplocks can only exist when there are handles.
3023 //
3024
3025 if (Dcb->UncleanCount != 0) {
3026
3027 Iosb.Status = FsRtlCheckOplock( FatGetFcbOplock(Dcb),
3028 IrpContext->OriginatingIrp,
3029 IrpContext,
3030 FatOplockComplete,
3031 FatPrePostIrp );
3032 }
3033
3034 //
3035 // if FsRtlCheckOplock returns STATUS_PENDING the IRP has been posted
3036 // to service an oplock break and we need to leave now.
3037 //
3038
3039 if (Iosb.Status == STATUS_PENDING) {
3040
3041 *OplockPostIrp = TRUE;
3042 try_return( NOTHING );
3043 }
3044
3045 //
3046 // If the caller wants atomic create-with-oplock semantics, tell
3047 // the oplock package. We haven't incremented the Fcb's UncleanCount
3048 // for this create yet, so add that in on the call.
3049 //
3050
3051 if (OpenRequiringOplock &&
3052 (Iosb.Status == STATUS_SUCCESS)) {
3053
3054 Iosb.Status = FsRtlOplockFsctrl( FatGetFcbOplock(Dcb),
3055 IrpContext->OriginatingIrp,
3056 (Dcb->UncleanCount + 1) );
3057 }
3058
3059 //
3060 // If we've encountered a failure we need to leave. FsRtlCheckOplock
3061 // will have returned STATUS_OPLOCK_BREAK_IN_PROGRESS if it initiated
3062 // and oplock break and the caller specified FILE_COMPLETE_IF_OPLOCKED
3063 // on the create call. That's an NT_SUCCESS code, so we need to keep
3064 // going.
3065 //
3066
3067 if ((Iosb.Status != STATUS_SUCCESS) &&
3068 (Iosb.Status != STATUS_OPLOCK_BREAK_IN_PROGRESS)) {
3069
3070 try_return( NOTHING );
3071 }
3072
3073#endif
3074
3075 //
3076 // Now that we're done with the oplock work update the share counts.
3077 // If the Dcb isn't yet opened we just set the share access rather than
3078 // update it.
3079 //
3080
3081 if (Dcb->OpenCount > 0) {
3082
3083 IoUpdateShareAccess( FileObject, &Dcb->ShareAccess );
3084
3085 } else {
3086
3087 IoSetShareAccess( *DesiredAccess,
3088 ShareAccess,
3089 FileObject,
3090 &Dcb->ShareAccess );
3091 }
3092
3093 UnwindShareAccess = TRUE;
3094
3095 //
3096 // Setup the context and section object pointers, and update
3097 // our reference counts
3098 //
3099
3100 FatSetFileObject( FileObject,
3101 UserDirectoryOpen,
3102 Dcb,
3103 UnwindCcb = FatCreateCcb( IrpContext ));
3104
3105 Dcb->UncleanCount += 1;
3106 Dcb->OpenCount += 1;
3107 Vcb->OpenFileCount += 1;
3108 if (IsFileObjectReadOnly(FileObject)) { Vcb->ReadOnlyCount += 1; }
3109
3110 //
3111 // Mark the delete on close bit if the caller asked for that.
3112 //
3113
3114 {
3115 PCCB Ccb = (PCCB)FileObject->FsContext2;
3116
3117
3118 if (DeleteOnClose) {
3119
3120 SetFlag( Ccb->Flags, CCB_FLAG_DELETE_ON_CLOSE );
3121 }
3122 if (FileNameOpenedDos) {
3123
3124 SetFlag( Ccb->Flags, CCB_FLAG_OPENED_BY_SHORTNAME );
3125 }
3126
3127 }
3128
3129
3130 //
3131 // In case this was set, clear it now.
3132 //
3133
3134 ClearFlag(Dcb->FcbState, FCB_STATE_DELAY_CLOSE);
3135
3136 //
3137 // And set our status to success
3138 //
3139
3140 Iosb.Status = STATUS_SUCCESS;
3141 Iosb.Information = FILE_OPENED;
3142
3143 try_exit: NOTHING;
3144 } _SEH2_FINALLY {
3145
3146 DebugUnwind( FatOpenExistingDcb );
3147
3148 //
3149 // Unpin the Dirent Bcb if pinned.
3150 //
3151
3152 FatUnpinBcb( IrpContext, DirentBcb );
3153
3154 //
3155 // If this is an abnormal termination then undo our work
3156 //
3157
3158 if (_SEH2_AbnormalTermination()) {
3159
3160 if (UnwindCcb != NULL) { FatDeleteCcb( IrpContext, &UnwindCcb ); }
3161 if (UnwindShareAccess) { IoRemoveShareAccess( FileObject, &Dcb->ShareAccess ); }
3162 }
3163
3164 if (DcbAcquired) {
3165
3166 FatReleaseFcb( IrpContext, Dcb );
3167 }
3168
3169 DebugTrace(-1, Dbg, "FatOpenExistingDcb -> Iosb.Status = %08lx\n", Iosb.Status);
3170 } _SEH2_END;
3171
3172 return Iosb;
3173}
3174
3175
3176//
3177// Internal support routine
3178//
3179
3180_Requires_lock_held_(_Global_critical_region_)
3181IO_STATUS_BLOCK
3182FatOpenExistingFcb (
3183 _In_ PIRP_CONTEXT IrpContext,
3184 _In_ PIO_STACK_LOCATION IrpSp,
3185 _Inout_ PFILE_OBJECT FileObject,
3186 _Inout_ PVCB Vcb,
3187 _Inout_ PFCB Fcb,
3188 _In_ PACCESS_MASK DesiredAccess,
3189 _In_ USHORT ShareAccess,
3190 _In_ ULONG AllocationSize,
3191 _In_ PFILE_FULL_EA_INFORMATION EaBuffer,
3192 _In_ ULONG EaLength,
3193 _In_ USHORT FileAttributes,
3194 _In_ ULONG CreateDisposition,
3195 _In_ BOOLEAN NoEaKnowledge,
3196 _In_ BOOLEAN DeleteOnClose,
3197 _In_ BOOLEAN OpenRequiringOplock,
3198 _In_ BOOLEAN FileNameOpenedDos,
3199 _Out_ PBOOLEAN OplockPostIrp
3200 )
3201
3202/*++
3203
3204Routine Description:
3205
3206 This routine opens the specified existing fcb
3207
3208Arguments:
3209
3210 FileObject - Supplies the File object
3211
3212 Vcb - Supplies the Vcb denoting the volume containing the Fcb
3213
3214 Fcb - Supplies the already existing fcb
3215
3216 DesiredAccess - Supplies the desired access of the caller
3217
3218 ShareAccess - Supplies the share access of the caller
3219
3220 AllocationSize - Supplies the initial allocation if the file is being
3221 superseded or overwritten
3222
3223 EaBuffer - Supplies the Ea set if the file is being superseded or
3224 overwritten
3225
3226 EaLength - Supplies the size, in byte, of the EaBuffer
3227
3228 FileAttributes - Supplies file attributes to use if the file is being
3229 superseded or overwritten
3230
3231 CreateDisposition - Supplies the create disposition for this operation
3232
3233 NoEaKnowledge - This opener doesn't understand Ea's and we fail this
3234 open if the file has NeedEa's.
3235
3236 DeleteOnClose - The caller wants the file gone when the handle is closed
3237
3238 OpenRequiringOplock - The caller provided the FILE_OPEN_REQUIRING_OPLOCK option.
3239
3240 FileNameOpenedDos - The caller hit the short side of the name pair finding
3241 this file
3242
3243 OplockPostIrp - Address to store boolean indicating if the Irp needs to
3244 be posted to the Fsp.
3245
3246Return Value:
3247
3248 IO_STATUS_BLOCK - Returns the completion status for the operation
3249
3250--*/
3251
3252{
3253 IO_STATUS_BLOCK Iosb = {0};
3254
3255 PBCB DirentBcb = NULL;
3256 PDIRENT Dirent;
3257
3258 ACCESS_MASK AddedAccess = 0;
3259
3260 //
3261 // The following variables are for abnormal termination
3262 //
3263
3264 BOOLEAN UnwindShareAccess = FALSE;
3265 PCCB UnwindCcb = NULL;
3266 BOOLEAN DecrementFcbOpenCount = FALSE;
3267 BOOLEAN FcbAcquired = FALSE;
3268
3269
3270 PAGED_CODE();
3271
3272 DebugTrace(+1, Dbg, "FatOpenExistingFcb...\n", 0);
3273
3274 //
3275 // Get the Fcb exlcusive. This is important as cleanup does not
3276 // acquire the Vcb.
3277 //
3278
3279 (VOID)FatAcquireExclusiveFcb( IrpContext, Fcb );
3280 FcbAcquired = TRUE;
3281
3282 _SEH2_TRY {
3283
3284
3285 *OplockPostIrp = FALSE;
3286
3287#if (NTDDI_VERSION >= NTDDI_WIN7)
3288
3289 //
3290 // Let's make sure that if the caller provided an oplock key that it
3291 // gets stored in the file object.
3292 //
3293
3294 Iosb.Status = FsRtlCheckOplockEx( FatGetFcbOplock(Fcb),
3295 IrpContext->OriginatingIrp,
3296 OPLOCK_FLAG_OPLOCK_KEY_CHECK_ONLY,
3297 NULL,
3298 NULL,
3299 NULL );
3300
3301 if (Iosb.Status != STATUS_SUCCESS) {
3302
3303 try_return( NOTHING );
3304 }
3305#endif
3306
3307 //
3308 // Take special action if there is a current batch oplock or
3309 // batch oplock break in process on the Fcb.
3310 //
3311
3312 if (FsRtlCurrentBatchOplock( FatGetFcbOplock(Fcb) )) {
3313
3314 //
3315 // We remember if a batch oplock break is underway for the
3316 // case where the sharing check fails.
3317 //
3318
3319 Iosb.Information = FILE_OPBATCH_BREAK_UNDERWAY;
3320
3321 Iosb.Status = FsRtlCheckOplock( FatGetFcbOplock(Fcb),
3322 IrpContext->OriginatingIrp,
3323 IrpContext,
3324 FatOplockComplete,
3325 FatPrePostIrp );
3326
3327 //
3328 // if FsRtlCheckOplock returns STATUS_PENDING the IRP has been posted
3329 // to service an oplock break and we need to leave now.
3330 //
3331
3332 if (Iosb.Status == STATUS_PENDING) {
3333
3334 *OplockPostIrp = TRUE;
3335 try_return( NOTHING );
3336 }
3337 }
3338
3339 //
3340 // Check if the user wanted to create the file, also special case
3341 // the supersede and overwrite options. Those add additional,
3342 // possibly only implied, desired accesses to the caller, which
3343 // we must be careful to pull back off if the caller did not actually
3344 // request them.
3345 //
3346 // In other words, check against the implied access, but do not modify
3347 // share access as a result.
3348 //
3349
3350 if (CreateDisposition == FILE_CREATE) {
3351
3352 Iosb.Status = STATUS_OBJECT_NAME_COLLISION;
3353 try_return( Iosb );
3354
3355 } else if (CreateDisposition == FILE_SUPERSEDE) {
3356
3357 SetFlag( AddedAccess,
3358 DELETE & ~(*DesiredAccess) );
3359
3360 *DesiredAccess |= DELETE;
3361
3362 } else if ((CreateDisposition == FILE_OVERWRITE) ||
3363 (CreateDisposition == FILE_OVERWRITE_IF)) {
3364
3365 SetFlag( AddedAccess,
3366 (FILE_WRITE_DATA | FILE_WRITE_EA | FILE_WRITE_ATTRIBUTES) & ~(*DesiredAccess) );
3367
3368 *DesiredAccess |= FILE_WRITE_DATA | FILE_WRITE_EA | FILE_WRITE_ATTRIBUTES;
3369 }
3370
3371 //
3372 // Check the desired access
3373 //
3374
3375 if (!FatCheckFileAccess( IrpContext,
3376 Fcb->DirentFatFlags,
3377 DesiredAccess )) {
3378
3379 Iosb.Status = STATUS_ACCESS_DENIED;
3380 try_return( Iosb );
3381 }
3382
3383
3384 //
3385 // Check for trying to delete a read only file.
3386 //
3387
3388 if (DeleteOnClose &&
3389 FlagOn( Fcb->DirentFatFlags, FAT_DIRENT_ATTR_READ_ONLY )) {
3390
3391 Iosb.Status = STATUS_CANNOT_DELETE;
3392 try_return( Iosb );
3393 }
3394
3395 //
3396 // If we are asked to do an overwrite or supersede operation then
3397 // deny access for files where the file attributes for system and
3398 // hidden do not match
3399 //
3400
3401 if ((CreateDisposition == FILE_SUPERSEDE) ||
3402 (CreateDisposition == FILE_OVERWRITE) ||
3403 (CreateDisposition == FILE_OVERWRITE_IF)) {
3404
3405 BOOLEAN Hidden;
3406 BOOLEAN System;
3407
3408 Hidden = BooleanFlagOn(Fcb->DirentFatFlags, FAT_DIRENT_ATTR_HIDDEN );
3409 System = BooleanFlagOn(Fcb->DirentFatFlags, FAT_DIRENT_ATTR_SYSTEM );
3410
3411 if ((Hidden && !FlagOn(FileAttributes, FILE_ATTRIBUTE_HIDDEN)) ||
3412 (System && !FlagOn(FileAttributes, FILE_ATTRIBUTE_SYSTEM))) {
3413
3414 DebugTrace(0, Dbg, "The hidden and/or system bits do not match\n", 0);
3415
3416
3417 Iosb.Status = STATUS_ACCESS_DENIED;
3418 try_return( Iosb );
3419 }
3420
3421 //
3422 // If this media is write protected, don't even try the create.
3423 //
3424
3425 if (FlagOn(Vcb->VcbState, VCB_STATE_FLAG_WRITE_PROTECTED)) {
3426
3427 //
3428 // Set the real device for the pop-up info, and set the verify
3429 // bit in the device object, so that we will force a verify
3430 // in case the user put the correct media back in.
3431 //
3432
3433 IoSetHardErrorOrVerifyDevice( IrpContext->OriginatingIrp,
3434 Vcb->Vpb->RealDevice );
3435
3436 SetFlag(Vcb->Vpb->RealDevice->Flags, DO_VERIFY_VOLUME);
3437
3438 FatRaiseStatus( IrpContext, STATUS_MEDIA_WRITE_PROTECTED );
3439 }
3440 }
3441
3442 //
3443 // Check if the Fcb has the proper share access. This routine will also
3444 // check for writable user secions if the user did not allow write sharing.
3445 //
3446
3447 if (!NT_SUCCESS(Iosb.Status = FatCheckShareAccess( IrpContext,
3448 FileObject,
3449 Fcb,
3450 DesiredAccess,
3451 ShareAccess ))) {
3452
3453#if (NTDDI_VERSION >= NTDDI_WIN7)
3454
3455 NTSTATUS OplockBreakStatus = STATUS_SUCCESS;
3456
3457 //
3458 // If we got a sharing violation try to break outstanding handle
3459 // oplocks and retry the sharing check. If the caller specified
3460 // FILE_COMPLETE_IF_OPLOCKED we don't bother breaking the oplock;
3461 // we just return the sharing violation.
3462 //
3463
3464 if ((Iosb.Status == STATUS_SHARING_VIOLATION) &&
3465 !FlagOn( IrpSp->Parameters.Create.Options, FILE_COMPLETE_IF_OPLOCKED )) {
3466
3467 OplockBreakStatus = FsRtlOplockBreakH( FatGetFcbOplock(Fcb),
3468 IrpContext->OriginatingIrp,
3469 0,
3470 IrpContext,
3471 FatOplockComplete,
3472 FatPrePostIrp );
3473
3474 //
3475 // If FsRtlOplockBreakH returned STATUS_PENDING, then the IRP
3476 // has been posted and we need to stop working.
3477 //
3478
3479 if (OplockBreakStatus == STATUS_PENDING) {
3480
3481 Iosb.Status = STATUS_PENDING;
3482 *OplockPostIrp = TRUE;
3483 try_return( NOTHING );
3484
3485 //
3486 // If FsRtlOplockBreakH returned an error we want to return that now.
3487 //
3488
3489 } else if (!NT_SUCCESS( OplockBreakStatus )) {
3490
3491 Iosb.Status = OplockBreakStatus;
3492 try_return( Iosb );
3493
3494 //
3495 // Otherwise FsRtlOplockBreakH returned STATUS_SUCCESS, indicating
3496 // that there is no oplock to be broken. The sharing violation is
3497 // returned in that case.
3498 //
3499
3500 } else {
3501
3502 NT_ASSERT( OplockBreakStatus == STATUS_SUCCESS );
3503
3504 try_return( Iosb );
3505 }
3506
3507 //
3508 // The initial sharing check failed with something other than sharing
3509 // violation (which should never happen, but let's be future-proof),
3510 // or we *did* get a sharing violation and the caller specified
3511 // FILE_COMPLETE_IF_OPLOCKED. Either way this create is over.
3512 //
3513
3514 } else {
3515
3516 try_return( Iosb );
3517 }
3518
3519#else
3520
3521 try_return( Iosb );
3522
3523#endif
3524 }
3525
3526 //
3527 // Now check that we can continue based on the oplock state of the
3528 // file. If there are no open handles yet we don't need to do this
3529 // check; oplocks can only exist when there are handles.
3530 //
3531 // It is important that we modified the DesiredAccess in place so
3532 // that the Oplock check proceeds against any added access we had
3533 // to give the caller.
3534 //
3535
3536 if (Fcb->UncleanCount != 0) {
3537
3538 Iosb.Status = FsRtlCheckOplock( FatGetFcbOplock(Fcb),
3539 IrpContext->OriginatingIrp,
3540 IrpContext,
3541 FatOplockComplete,
3542 FatPrePostIrp );
3543 }
3544
3545 //
3546 // if FsRtlCheckOplock returns STATUS_PENDING the IRP has been posted
3547 // to service an oplock break and we need to leave now.
3548 //
3549
3550 if (Iosb.Status == STATUS_PENDING) {
3551
3552 *OplockPostIrp = TRUE;
3553 try_return( NOTHING );
3554 }
3555
3556 //
3557 // If the caller wants atomic create-with-oplock semantics, tell
3558 // the oplock package. We haven't incremented the Fcb's UncleanCount
3559 // for this create yet, so add that in on the call.
3560 //
3561
3562 if (OpenRequiringOplock &&
3563 (Iosb.Status == STATUS_SUCCESS)) {
3564
3565 Iosb.Status = FsRtlOplockFsctrl( FatGetFcbOplock(Fcb),
3566 IrpContext->OriginatingIrp,
3567 (Fcb->UncleanCount + 1) );
3568 }
3569
3570 //
3571 // If we've encountered a failure we need to leave. FsRtlCheckOplock
3572 // will have returned STATUS_OPLOCK_BREAK_IN_PROGRESS if it initiated
3573 // and oplock break and the caller specified FILE_COMPLETE_IF_OPLOCKED
3574 // on the create call. That's an NT_SUCCESS code, so we need to keep
3575 // going.
3576 //
3577
3578 if ((Iosb.Status != STATUS_SUCCESS) &&
3579 (Iosb.Status != STATUS_OPLOCK_BREAK_IN_PROGRESS)) {
3580
3581 try_return( NOTHING );
3582 }
3583
3584 //
3585 // Set the flag indicating if Fast I/O is possible
3586 //
3587
3588 Fcb->Header.IsFastIoPossible = FatIsFastIoPossible( Fcb );
3589
3590 //
3591 // If the user wants write access access to the file make sure there
3592 // is not a process mapping this file as an image. Any attempt to
3593 // delete the file will be stopped in fileinfo.c
3594 //
3595 // If the user wants to delete on close, we must check at this
3596 // point though.
3597 //
3598
3599 if (FlagOn(*DesiredAccess, FILE_WRITE_DATA) || DeleteOnClose) {
3600
3601 Fcb->OpenCount += 1;
3602 DecrementFcbOpenCount = TRUE;
3603
3604 if (!MmFlushImageSection( &Fcb->NonPaged->SectionObjectPointers,
3605 MmFlushForWrite )) {
3606
3607 Iosb.Status = DeleteOnClose ? STATUS_CANNOT_DELETE :
3608 STATUS_SHARING_VIOLATION;
3609 try_return( Iosb );
3610 }
3611 }
3612
3613 //
3614 // If this is a non-cached open on a non-paging file, and there
3615 // are no open cached handles, but there is a still a data
3616 // section, attempt a flush and purge operation to avoid cache
3617 // coherency overhead later. We ignore any I/O errors from
3618 // the flush.
3619 //
3620 // We set the CREATE_IN_PROGRESS flag to prevent the Fcb from
3621 // going away out from underneath us.
3622 //
3623
3624 if (FlagOn( FileObject->Flags, FO_NO_INTERMEDIATE_BUFFERING ) &&
3625 (Fcb->UncleanCount == Fcb->NonCachedUncleanCount) &&
3626 (Fcb->NonPaged->SectionObjectPointers.DataSectionObject != NULL) &&
3627 !FlagOn( Fcb->FcbState, FCB_STATE_PAGING_FILE )) {
3628
3629 SetFlag(Fcb->Vcb->VcbState, VCB_STATE_FLAG_CREATE_IN_PROGRESS);
3630
3631 CcFlushCache( &Fcb->NonPaged->SectionObjectPointers, NULL, 0, NULL );
3632
3633 //
3634 // Grab and release PagingIo to serialize ourselves with the lazy writer.
3635 // This will work to ensure that all IO has completed on the cached
3636 // data and we will succesfully tear away the cache section.
3637 //
3638
3639 ExAcquireResourceExclusiveLite( Fcb->Header.PagingIoResource, TRUE);
3640 ExReleaseResourceLite( Fcb->Header.PagingIoResource );
3641
3642 CcPurgeCacheSection( &Fcb->NonPaged->SectionObjectPointers,
3643 NULL,
3644 0,
3645 FALSE );
3646
3647 ClearFlag(Fcb->Vcb->VcbState, VCB_STATE_FLAG_CREATE_IN_PROGRESS);
3648 }
3649
3650 //
3651 // Check if the user only wanted to open the file
3652 //
3653
3654 if ((CreateDisposition == FILE_OPEN) ||
3655 (CreateDisposition == FILE_OPEN_IF)) {
3656
3657 DebugTrace(0, Dbg, "Doing open operation\n", 0);
3658
3659 //
3660 // If the caller has no Ea knowledge, we immediately check for
3661 // Need Ea's on the file.
3662 //
3663
3664 if (NoEaKnowledge && !FatIsFat32(Vcb)) {
3665
3666 ULONG NeedEaCount;
3667
3668 //
3669 // Get the dirent for the file and then check that the need
3670 // ea count is 0.
3671 //
3672
3673 FatGetDirentFromFcbOrDcb( IrpContext,
3674 Fcb,
3675 FALSE,
3676 &Dirent,
3677 &DirentBcb );
3678
3679 FatGetNeedEaCount( IrpContext,
3680 Vcb,
3681 Dirent,
3682 &NeedEaCount );
3683
3684 FatUnpinBcb( IrpContext, DirentBcb );
3685
3686 if (NeedEaCount != 0) {
3687
3688 Iosb.Status = STATUS_ACCESS_DENIED;
3689 try_return( Iosb );
3690 }
3691 }
3692
3693 //
3694 // Everything checks out okay, so setup the context and
3695 // section object pointers.
3696 //
3697
3698 FatSetFileObject( FileObject,
3699 UserFileOpen,
3700 Fcb,
3701 UnwindCcb = FatCreateCcb( IrpContext ));
3702
3703 FileObject->SectionObjectPointer = &Fcb->NonPaged->SectionObjectPointers;
3704
3705 //
3706 // Fill in the information field, the status field is already
3707 // set.
3708 //
3709
3710 Iosb.Information = FILE_OPENED;
3711
3712 try_return( Iosb );
3713 }
3714
3715 //
3716 // Check if we are to supersede/overwrite the file, we can wait for
3717 // any I/O at this point
3718 //
3719
3720 if ((CreateDisposition == FILE_SUPERSEDE) ||
3721 (CreateDisposition == FILE_OVERWRITE) ||
3722 (CreateDisposition == FILE_OVERWRITE_IF)) {
3723
3724 NTSTATUS OldStatus;
3725
3726 DebugTrace(0, Dbg, "Doing supersede/overwrite operation\n", 0);
3727
3728 //
3729 // We remember the previous status code because it may contain
3730 // information about the oplock status.
3731 //
3732
3733 OldStatus = Iosb.Status;
3734
3735 //
3736 // Determine the granted access for this operation now.
3737 //
3738
3739 if (!NT_SUCCESS( Iosb.Status = FatCheckSystemSecurityAccess( IrpContext ))) {
3740
3741 try_return( Iosb );
3742 }
3743
3744 //
3745 // And overwrite the file.
3746 //
3747
3748 Iosb = FatSupersedeOrOverwriteFile( IrpContext,
3749 FileObject,
3750 Fcb,
3751 AllocationSize,
3752 EaBuffer,
3753 EaLength,
3754 FileAttributes,
3755 CreateDisposition,
3756 NoEaKnowledge );
3757
3758 if (Iosb.Status == STATUS_SUCCESS) {
3759
3760 Iosb.Status = OldStatus;
3761 }
3762
3763 try_return( Iosb );
3764 }
3765
3766 //
3767 // If we ever get here then the I/O system gave us some bad input
3768 //
3769
3770#ifdef _MSC_VER
3771#pragma prefast( suppress:28159, "things are seriously wrong if we get here" )
3772#endif
3773 FatBugCheck( CreateDisposition, 0, 0 );
3774
3775 try_exit: NOTHING;
3776
3777 //
3778 // Update the share access and counts if successful
3779 //
3780
3781 if ((Iosb.Status != STATUS_PENDING) && NT_SUCCESS(Iosb.Status)) {
3782
3783 //
3784 // Now, we may have added some access bits above to indicate the access
3785 // this caller would conflict with (as opposed to what they get) in order
3786 // to perform the overwrite/supersede. We need to make a call to that will
3787 // recalculate the bits in the fileobject to reflect the real access they
3788 // will get.
3789 //
3790
3791 if (AddedAccess) {
3792
3793 NTSTATUS Status;
3794
3795 ClearFlag( *DesiredAccess, AddedAccess );
3796
3797#ifdef _MSC_VER
3798#pragma prefast( suppress:28931, "it needs to be there for debug assert" );
3799#endif
3800 Status = IoCheckShareAccess( *DesiredAccess,
3801 ShareAccess,
3802 FileObject,
3803 &Fcb->ShareAccess,
3804 TRUE );
3805
3806 //
3807 // It must be the case that we are really asking for less access, so
3808 // any conflict must have been detected before this point.
3809 //
3810
3811 NT_ASSERT( Status == STATUS_SUCCESS );
3812
3813 } else {
3814
3815 IoUpdateShareAccess( FileObject, &Fcb->ShareAccess );
3816 }
3817
3818 UnwindShareAccess = TRUE;
3819
3820 //
3821 // In case this was set, clear it now.
3822 //
3823
3824 ClearFlag(Fcb->FcbState, FCB_STATE_DELAY_CLOSE);
3825
3826 Fcb->UncleanCount += 1;
3827 Fcb->OpenCount += 1;
3828 if (FlagOn(FileObject->Flags, FO_NO_INTERMEDIATE_BUFFERING)) {
3829 Fcb->NonCachedUncleanCount += 1;
3830 }
3831 Vcb->OpenFileCount += 1;
3832 if (IsFileObjectReadOnly(FileObject)) { Vcb->ReadOnlyCount += 1; }
3833
3834 {
3835 PCCB Ccb;
3836
3837 Ccb = (PCCB)FileObject->FsContext2;
3838
3839 //
3840 // Mark the DeleteOnClose bit if the operation was successful.
3841 //
3842
3843 if ( DeleteOnClose ) {
3844
3845 SetFlag( Ccb->Flags, CCB_FLAG_DELETE_ON_CLOSE );
3846 }
3847
3848 //
3849 // Mark the OpenedByShortName bit if the operation was successful.
3850 //
3851
3852 if ( FileNameOpenedDos ) {
3853
3854 SetFlag( Ccb->Flags, CCB_FLAG_OPENED_BY_SHORTNAME );
3855 }
3856
3857 //
3858 // Mark the ManageVolumeAccess bit if the privilege is held.
3859 //
3860
3861 if (FatCheckManageVolumeAccess( IrpContext,
3862 IrpSp->Parameters.Create.SecurityContext->AccessState,
3863 (KPROCESSOR_MODE)( FlagOn( IrpSp->Flags, SL_FORCE_ACCESS_CHECK ) ?
3864 UserMode :
3865 IrpContext->OriginatingIrp->RequestorMode ))) {
3866
3867 SetFlag( Ccb->Flags, CCB_FLAG_MANAGE_VOLUME_ACCESS );
3868 }
3869 }
3870
3871
3872 }
3873
3874 } _SEH2_FINALLY {
3875
3876 DebugUnwind( FatOpenExistingFcb );
3877
3878 //
3879 // Unpin the Dirent Bcb if pinned.
3880 //
3881
3882 FatUnpinBcb( IrpContext, DirentBcb );
3883
3884 //
3885 // If this is an abnormal termination then undo our work
3886 //
3887
3888 if (_SEH2_AbnormalTermination()) {
3889
3890 if (UnwindCcb != NULL) { FatDeleteCcb( IrpContext, &UnwindCcb ); }
3891 if (UnwindShareAccess) { IoRemoveShareAccess( FileObject, &Fcb->ShareAccess ); }
3892 }
3893
3894 if (DecrementFcbOpenCount) {
3895
3896 Fcb->OpenCount -= 1;
3897
3898 if (Fcb->OpenCount == 0) {
3899 if (ARGUMENT_PRESENT( FileObject )) {
3900 FileObject->SectionObjectPointer = NULL;
3901 }
3902 FatDeleteFcb( IrpContext, &Fcb );
3903 FcbAcquired = FALSE;
3904 }
3905 }
3906
3907 if (FcbAcquired) {
3908
3909 FatReleaseFcb( IrpContext, Fcb );
3910 }
3911
3912 DebugTrace(-1, Dbg, "FatOpenExistingFcb -> Iosb.Status = %08lx\n", Iosb.Status);
3913 } _SEH2_END;
3914
3915 return Iosb;
3916}
3917
3918//
3919// Internal support routine
3920//
3921
3922_Requires_lock_held_(_Global_critical_region_)
3923IO_STATUS_BLOCK
3924FatOpenTargetDirectory (
3925 _In_ PIRP_CONTEXT IrpContext,
3926 _Inout_ PFILE_OBJECT FileObject,
3927 _Inout_ PDCB Dcb,
3928 _In_ PACCESS_MASK DesiredAccess,
3929 _In_ USHORT ShareAccess,
3930 _In_ BOOLEAN DoesNameExist,
3931 _In_ BOOLEAN FileNameOpenedDos
3932 )
3933
3934/*++
3935
3936Routine Description:
3937
3938 This routine opens the target directory and replaces the name in the
3939 file object with the remaining name.
3940
3941Arguments:
3942
3943 FileObject - Supplies the File object
3944
3945 Dcb - Supplies an already existing dcb that we are going to open
3946
3947 DesiredAccess - Supplies the desired access of the caller
3948
3949 ShareAccess - Supplies the share access of the caller
3950
3951 DoesNameExist - Indicates if the file name already exists in the
3952 target directory.
3953
3954
3955Return Value:
3956
3957 IO_STATUS_BLOCK - Returns the completion status for the operation
3958
3959--*/
3960
3961{
3962 IO_STATUS_BLOCK Iosb = {0};
3963
3964 //
3965 // The following variables are for abnormal termination
3966 //
3967
3968 BOOLEAN UnwindShareAccess = FALSE;
3969 PCCB UnwindCcb = NULL;
3970 BOOLEAN DcbAcquired = FALSE;
3971
3972 PAGED_CODE();
3973
3974 DebugTrace(+1, Dbg, "FatOpenTargetDirectory...\n", 0);
3975
3976 //
3977 // Get the Dcb exlcusive. This is important as cleanup does not
3978 // acquire the Vcb.
3979 //
3980
3981 (VOID)FatAcquireExclusiveFcb( IrpContext, Dcb );
3982 DcbAcquired = TRUE;
3983
3984 _SEH2_TRY {
3985
3986 ULONG i;
3987
3988 //
3989 // If the Dcb is already opened by someone then we need
3990 // to check the share access
3991 //
3992
3993 if (Dcb->OpenCount > 0) {
3994
3995 if (!NT_SUCCESS(Iosb.Status = IoCheckShareAccess( *DesiredAccess,
3996 ShareAccess,
3997 FileObject,
3998 &Dcb->ShareAccess,
3999 TRUE ))) {
4000
4001 try_return( Iosb );
4002 }
4003
4004 } else {
4005
4006 IoSetShareAccess( *DesiredAccess,
4007 ShareAccess,
4008 FileObject,
4009 &Dcb->ShareAccess );
4010 }
4011
4012 UnwindShareAccess = TRUE;
4013
4014 //
4015 // Setup the context and section object pointers, and update
4016 // our reference counts
4017 //
4018
4019 FatSetFileObject( FileObject,
4020 UserDirectoryOpen,
4021 Dcb,
4022 UnwindCcb = FatCreateCcb( IrpContext ));
4023
4024 Dcb->UncleanCount += 1;
4025 Dcb->OpenCount += 1;
4026 Dcb->Vcb->OpenFileCount += 1;
4027 if (IsFileObjectReadOnly(FileObject)) { Dcb->Vcb->ReadOnlyCount += 1; }
4028
4029 //
4030 // Update the name in the file object, by definition the remaining
4031 // part must be shorter than the original file name so we'll just
4032 // overwrite the file name.
4033 //
4034
4035 i = FileObject->FileName.Length/sizeof(WCHAR) - 1;
4036
4037 //
4038 // Get rid of a trailing backslash
4039 //
4040
4041 if (FileObject->FileName.Buffer[i] == L'\\') {
4042
4043 NT_ASSERT(i != 0);
4044
4045 FileObject->FileName.Length -= sizeof(WCHAR);
4046 i -= 1;
4047 }
4048
4049 //
4050 // Find the first non-backslash character. i will be its index.
4051 //
4052
4053 while (TRUE) {
4054
4055 if (FileObject->FileName.Buffer[i] == L'\\') {
4056
4057 i += 1;
4058 break;
4059 }
4060
4061 if (i == 0) {
4062 break;
4063 }
4064
4065 i--;
4066 }
4067
4068 if (i) {
4069
4070 FileObject->FileName.Length -= (USHORT)(i * sizeof(WCHAR));
4071
4072 RtlMoveMemory( &FileObject->FileName.Buffer[0],
4073 &FileObject->FileName.Buffer[i],
4074 FileObject->FileName.Length );
4075 }
4076
4077 //
4078 // And set our status to success
4079 //
4080
4081 Iosb.Status = STATUS_SUCCESS;
4082 Iosb.Information = (DoesNameExist ? FILE_EXISTS : FILE_DOES_NOT_EXIST);
4083
4084 if ( ( NT_SUCCESS(Iosb.Status) ) && ( DoesNameExist ) ) {
4085 PCCB Ccb;
4086
4087 Ccb = (PCCB)FileObject->FsContext2;
4088
4089 //
4090 // Mark the OpenedByShortName bit if the operation was successful.
4091 //
4092
4093 if ( FileNameOpenedDos ) {
4094
4095 SetFlag( Ccb->Flags, CCB_FLAG_OPENED_BY_SHORTNAME );
4096 }
4097 }
4098
4099 try_exit: NOTHING;
4100 } _SEH2_FINALLY {
4101
4102 DebugUnwind( FatOpenTargetDirectory );
4103
4104 //
4105 // If this is an abnormal termination then undo our work
4106 //
4107
4108 if (_SEH2_AbnormalTermination()) {
4109
4110 if (UnwindCcb != NULL) { FatDeleteCcb( IrpContext, &UnwindCcb ); }
4111 if (UnwindShareAccess) { IoRemoveShareAccess( FileObject, &Dcb->ShareAccess ); }
4112 }
4113
4114 if (DcbAcquired) {
4115
4116 FatReleaseFcb( IrpContext, Dcb );
4117 }
4118
4119 DebugTrace(-1, Dbg, "FatOpenTargetDirectory -> Iosb.Status = %08lx\n", Iosb.Status);
4120 } _SEH2_END;
4121
4122 return Iosb;
4123}
4124
4125
4126
4127//
4128// Internal support routine
4129//
4130_Success_(return.Status == STATUS_SUCCESS)
4131_Requires_lock_held_(_Global_critical_region_)
4132IO_STATUS_BLOCK
4133#ifdef _MSC_VER
4134#pragma warning(suppress:6101) // bug in PREFast means the _Success_ annotation is not correctly applied
4135#endif
4136FatOpenExistingDirectory (
4137 _In_ PIRP_CONTEXT IrpContext,
4138 _In_ PIO_STACK_LOCATION IrpSp,
4139 _Inout_ PFILE_OBJECT FileObject,
4140 _Inout_ PVCB Vcb,
4141 _Outptr_result_maybenull_ PDCB *Dcb,
4142 _In_ PDCB ParentDcb,
4143 _In_ PDIRENT Dirent,
4144 _In_ ULONG LfnByteOffset,
4145 _In_ ULONG DirentByteOffset,
4146 _In_ PUNICODE_STRING Lfn,
4147 _In_ PACCESS_MASK DesiredAccess,
4148 _In_ USHORT ShareAccess,
4149 _In_ ULONG CreateDisposition,
4150 _In_ BOOLEAN NoEaKnowledge,
4151 _In_ BOOLEAN DeleteOnClose,
4152 _In_ BOOLEAN FileNameOpenedDos,
4153 _In_ BOOLEAN OpenRequiringOplock
4154 )
4155
4156/*++
4157
4158Routine Description:
4159
4160 This routine opens the specified directory. The directory has not
4161 previously been opened.
4162
4163Arguments:
4164
4165 FileObject - Supplies the File object
4166
4167 Vcb - Supplies the Vcb denoting the volume containing the dcb
4168
4169 Dcb - Returns the newly-created DCB for the file.
4170
4171 ParentDcb - Supplies the parent directory containing the subdirectory
4172 to be opened
4173
4174 DirectoryName - Supplies the file name of the directory being opened.
4175
4176 Dirent - Supplies the dirent for the directory being opened
4177
4178 LfnByteOffset - Tells where the Lfn begins. If there is no Lfn
4179 this field is the same as DirentByteOffset.
4180
4181 DirentByteOffset - Supplies the Vbo of the dirent within its parent
4182 directory
4183
4184 Lfn - May supply a long name for the file.
4185
4186 DesiredAccess - Supplies the desired access of the caller
4187
4188 ShareAccess - Supplies the share access of the caller
4189
4190 CreateDisposition - Supplies the create disposition for this operation
4191
4192 NoEaKnowledge - This opener doesn't understand Ea's and we fail this
4193 open if the file has NeedEa's.
4194
4195 DeleteOnClose - The caller wants the file gone when the handle is closed
4196
4197 OpenRequiringOplock - The caller provided the FILE_OPEN_REQUIRING_OPLOCK option.
4198
4199Return Value:
4200
4201 IO_STATUS_BLOCK - Returns the completion status for the operation
4202
4203--*/
4204
4205{
4206 IO_STATUS_BLOCK Iosb = {0};
4207
4208 //
4209 // The following variables are for abnormal termination
4210 //
4211
4212 PDCB UnwindDcb = NULL;
4213 PCCB UnwindCcb = NULL;
4214
4215 BOOLEAN CountsIncremented = FALSE;
4216
4217 UNREFERENCED_PARAMETER( DeleteOnClose );
4218#if (NTDDI_VERSION <= NTDDI_WIN7)
4219 UNREFERENCED_PARAMETER( OpenRequiringOplock );
4220#endif
4221 UNREFERENCED_PARAMETER( IrpSp );
4222
4223 PAGED_CODE();
4224
4225 DebugTrace(+1, Dbg, "FatOpenExistingDirectory...\n", 0);
4226
4227 _SEH2_TRY {
4228
4229 //
4230 // If the caller has no Ea knowledge, we immediately check for
4231 // Need Ea's on the file.
4232 //
4233
4234 if (NoEaKnowledge && !FatIsFat32(Vcb)) {
4235
4236 ULONG NeedEaCount;
4237
4238 FatGetNeedEaCount( IrpContext,
4239 Vcb,
4240 Dirent,
4241 &NeedEaCount );
4242
4243 if (NeedEaCount != 0) {
4244
4245 Iosb.Status = STATUS_ACCESS_DENIED;
4246 try_return( Iosb );
4247 }
4248 }
4249
4250 //
4251 // Check the create disposition and desired access
4252 //
4253
4254 if ((CreateDisposition != FILE_OPEN) &&
4255 (CreateDisposition != FILE_OPEN_IF)) {
4256
4257 Iosb.Status = STATUS_OBJECT_NAME_COLLISION;
4258 try_return( Iosb );
4259 }
4260
4261 if (!FatCheckFileAccess( IrpContext,
4262 Dirent->Attributes,
4263 DesiredAccess)) {
4264
4265 Iosb.Status = STATUS_ACCESS_DENIED;
4266 try_return( Iosb );
4267 }
4268
4269 //
4270 // Create a new dcb for the directory
4271 //
4272
4273 *Dcb = UnwindDcb = FatCreateDcb( IrpContext,
4274 Vcb,
4275 ParentDcb,
4276 LfnByteOffset,
4277 DirentByteOffset,
4278 Dirent,
4279 Lfn );
4280
4281#if (NTDDI_VERSION >= NTDDI_WIN8)
4282
4283 //
4284 // Let's make sure that if the caller provided an oplock key that it
4285 // gets stored in the file object.
4286 //
4287
4288 Iosb.Status = FsRtlCheckOplockEx( FatGetFcbOplock(*Dcb),
4289 IrpContext->OriginatingIrp,
4290 OPLOCK_FLAG_OPLOCK_KEY_CHECK_ONLY,
4291 NULL,
4292 NULL,
4293 NULL );
4294
4295 //
4296 // If the caller wants atomic create-with-oplock semantics, tell
4297 // the oplock package. We haven't incremented the Fcb's UncleanCount
4298 // for this create yet, so add that in on the call.
4299 //
4300
4301 if (OpenRequiringOplock &&
4302 (Iosb.Status == STATUS_SUCCESS)) {
4303
4304 Iosb.Status = FsRtlOplockFsctrl( FatGetFcbOplock(*Dcb),
4305 IrpContext->OriginatingIrp,
4306 ((*Dcb)->UncleanCount + 1) );
4307 }
4308
4309 //
4310 // Get out if either of the above calls failed. Raise to trigger
4311 // cleanup of the new Dcb.
4312 //
4313
4314 if (Iosb.Status != STATUS_SUCCESS) {
4315
4316 NT_ASSERT( Iosb.Status != STATUS_PENDING );
4317
4318 FatRaiseStatus( IrpContext, Iosb.Status );
4319 }
4320#endif
4321
4322 //
4323 // Setup our share access
4324 //
4325
4326 IoSetShareAccess( *DesiredAccess,
4327 ShareAccess,
4328 FileObject,
4329 &(*Dcb)->ShareAccess );
4330
4331 //
4332 // Setup the context and section object pointers, and update
4333 // our reference counts
4334 //
4335
4336 FatSetFileObject( FileObject,
4337 UserDirectoryOpen,
4338 (*Dcb),
4339 UnwindCcb = FatCreateCcb( IrpContext ));
4340
4341 (*Dcb)->UncleanCount += 1;
4342 (*Dcb)->OpenCount += 1;
4343 Vcb->OpenFileCount += 1;
4344 if (IsFileObjectReadOnly(FileObject)) { Vcb->ReadOnlyCount += 1; }
4345
4346 CountsIncremented = TRUE;
4347
4348
4349 //
4350 // And set our status to success
4351 //
4352
4353 Iosb.Status = STATUS_SUCCESS;
4354 Iosb.Information = FILE_OPENED;
4355
4356 if ( NT_SUCCESS(Iosb.Status) ) {
4357 PCCB Ccb;
4358
4359 Ccb = (PCCB)FileObject->FsContext2;
4360
4361 //
4362 // Mark the OpenedByShortName bit if the operation was successful.
4363 //
4364
4365 if ( FileNameOpenedDos ) {
4366
4367 SetFlag( Ccb->Flags, CCB_FLAG_OPENED_BY_SHORTNAME );
4368 }
4369 }
4370
4371 try_exit: NOTHING;
4372 } _SEH2_FINALLY {
4373
4374 DebugUnwind( FatOpenExistingDirectory );
4375
4376 //
4377 // If this is an abnormal termination then undo our work
4378 //
4379
4380 if (_SEH2_AbnormalTermination()) {
4381
4382 if (CountsIncremented) {
4383
4384 (*Dcb)->UncleanCount -= 1;
4385 (*Dcb)->OpenCount -= 1;
4386 Vcb->OpenFileCount -= 1;
4387 if (IsFileObjectReadOnly(FileObject)) { Vcb->ReadOnlyCount -= 1; }
4388 }
4389
4390 if (UnwindDcb != NULL) {
4391 if (ARGUMENT_PRESENT( FileObject )) {
4392 FileObject->SectionObjectPointer = NULL;
4393 }
4394 FatDeleteFcb( IrpContext, &UnwindDcb );
4395 *Dcb = NULL;
4396 }
4397 if (UnwindCcb != NULL) { FatDeleteCcb( IrpContext, &UnwindCcb ); }
4398 }
4399
4400 DebugTrace(-1, Dbg, "FatOpenExistingDirectory -> Iosb.Status = %08lx\n", Iosb.Status);
4401 } _SEH2_END;
4402
4403 return Iosb;
4404}
4405
4406
4407//
4408// Internal support routine
4409//
4410
4411_Requires_lock_held_(_Global_critical_region_)
4412IO_STATUS_BLOCK
4413FatOpenExistingFile (
4414 _In_ PIRP_CONTEXT IrpContext,
4415 _Inout_ PFILE_OBJECT FileObject,
4416 _Inout_ PVCB Vcb,
4417 _Outptr_result_maybenull_ PFCB *Fcb,
4418 _In_ PDCB ParentDcb,
4419 _In_ PDIRENT Dirent,
4420 _In_ ULONG LfnByteOffset,
4421 _In_ ULONG DirentByteOffset,
4422 _In_ PUNICODE_STRING Lfn,
4423 _In_ PUNICODE_STRING OrigLfn,
4424 _In_ PACCESS_MASK DesiredAccess,
4425 _In_ USHORT ShareAccess,
4426 _In_ ULONG AllocationSize,
4427 _In_ PFILE_FULL_EA_INFORMATION EaBuffer,
4428 _In_ ULONG EaLength,
4429 _In_ USHORT FileAttributes,
4430 _In_ ULONG CreateDisposition,
4431 _In_ BOOLEAN IsPagingFile,
4432 _In_ BOOLEAN NoEaKnowledge,
4433 _In_ BOOLEAN DeleteOnClose,
4434 _In_ BOOLEAN OpenRequiringOplock,
4435 _In_ BOOLEAN FileNameOpenedDos
4436 )
4437
4438/*++
4439
4440Routine Description:
4441
4442 This routine opens the specified file. The file has not previously
4443 been opened.
4444
4445Arguments:
4446
4447 FileObject - Supplies the File object
4448
4449 Vcb - Supplies the Vcb denoting the volume containing the file
4450
4451 Fcb - Returns the newly-created FCB for the file.
4452
4453 ParentDcb - Supplies the parent directory containing the file to be
4454 opened
4455
4456 Dirent - Supplies the dirent for the file being opened
4457
4458 LfnByteOffset - Tells where the Lfn begins. If there is no Lfn
4459 this field is the same as DirentByteOffset.
4460
4461 DirentByteOffset - Supplies the Vbo of the dirent within its parent
4462 directory
4463
4464 Lfn - May supply a long name for the file.
4465
4466 DesiredAccess - Supplies the desired access of the caller
4467
4468 ShareAccess - Supplies the share access of the caller
4469
4470 AllocationSize - Supplies the initial allocation if the file is being
4471 superseded, overwritten, or created.
4472
4473 EaBuffer - Supplies the Ea set if the file is being superseded,
4474 overwritten, or created.
4475
4476 EaLength - Supplies the size, in byte, of the EaBuffer
4477
4478 FileAttributes - Supplies file attributes to use if the file is being
4479 superseded, overwritten, or created
4480
4481 CreateDisposition - Supplies the create disposition for this operation
4482
4483 IsPagingFile - Indicates if this is the paging file being opened.
4484
4485 NoEaKnowledge - This opener doesn't understand Ea's and we fail this
4486 open if the file has NeedEa's.
4487
4488 DeleteOnClose - The caller wants the file gone when the handle is closed
4489
4490 OpenRequiringOplock - The caller provided the FILE_OPEN_REQUIRING_OPLOCK option.
4491
4492 FileNameOpenedDos - The caller opened this file by hitting the 8.3 side
4493 of the Lfn/8.3 pair
4494
4495Return Value:
4496
4497 IO_STATUS_BLOCK - Returns the completion status for the operation
4498
4499--*/
4500
4501{
4502 IO_STATUS_BLOCK Iosb = {0};
4503
4504 ACCESS_MASK AddedAccess = 0;
4505
4506 PIO_STACK_LOCATION IrpSp = IoGetCurrentIrpStackLocation( IrpContext->OriginatingIrp );
4507
4508 //
4509 // The following variables are for abnormal termination
4510 //
4511
4512 PFCB UnwindFcb = NULL;
4513 PCCB UnwindCcb = NULL;
4514 BOOLEAN CountsIncremented = FALSE;
4515
4516
4517#if (NTDDI_VERSION < NTDDI_WIN7)
4518 UNREFERENCED_PARAMETER( OpenRequiringOplock );
4519#endif
4520
4521 PAGED_CODE();
4522
4523 DebugTrace(+1, Dbg, "FatOpenExistingFile...\n", 0);
4524
4525 _SEH2_TRY {
4526
4527 //
4528 // Check if the user wanted to create the file or if access is
4529 // denied
4530 //
4531
4532 if (CreateDisposition == FILE_CREATE) {
4533 Iosb.Status = STATUS_OBJECT_NAME_COLLISION;
4534 try_return( Iosb );
4535
4536 } else if ((CreateDisposition == FILE_SUPERSEDE) && !IsPagingFile) {
4537
4538 SetFlag( AddedAccess,
4539 DELETE & ~(*DesiredAccess) );
4540
4541 *DesiredAccess |= DELETE;
4542
4543 } else if (((CreateDisposition == FILE_OVERWRITE) ||
4544 (CreateDisposition == FILE_OVERWRITE_IF)) && !IsPagingFile) {
4545
4546 SetFlag( AddedAccess,
4547 (FILE_WRITE_DATA | FILE_WRITE_EA | FILE_WRITE_ATTRIBUTES) & ~(*DesiredAccess) );
4548
4549 *DesiredAccess |= FILE_WRITE_DATA | FILE_WRITE_EA | FILE_WRITE_ATTRIBUTES;
4550 }
4551
4552 if (!FatCheckFileAccess( IrpContext,
4553 Dirent->Attributes,
4554 DesiredAccess)) {
4555
4556 Iosb.Status = STATUS_ACCESS_DENIED;
4557 try_return( Iosb );
4558 }
4559
4560
4561 //
4562 // Check for trying to delete a read only file.
4563 //
4564
4565 if (DeleteOnClose &&
4566 FlagOn( Dirent->Attributes, FAT_DIRENT_ATTR_READ_ONLY )) {
4567
4568 Iosb.Status = STATUS_CANNOT_DELETE;
4569 try_return( Iosb );
4570 }
4571
4572 //
4573 // IF we are asked to do an overwrite or supersede operation then
4574 // deny access for files where the file attributes for system and
4575 // hidden do not match
4576 //
4577
4578 if ((CreateDisposition == FILE_SUPERSEDE) ||
4579 (CreateDisposition == FILE_OVERWRITE) ||
4580 (CreateDisposition == FILE_OVERWRITE_IF)) {
4581
4582 BOOLEAN Hidden;
4583 BOOLEAN System;
4584
4585 Hidden = BooleanFlagOn(Dirent->Attributes, FAT_DIRENT_ATTR_HIDDEN );
4586 System = BooleanFlagOn(Dirent->Attributes, FAT_DIRENT_ATTR_SYSTEM );
4587
4588 if ((Hidden && !FlagOn(FileAttributes, FILE_ATTRIBUTE_HIDDEN)) ||
4589 (System && !FlagOn(FileAttributes, FILE_ATTRIBUTE_SYSTEM))) {
4590
4591 DebugTrace(0, Dbg, "The hidden and/or system bits do not match\n", 0);
4592
4593 if ( !IsPagingFile ) {
4594
4595 Iosb.Status = STATUS_ACCESS_DENIED;
4596 try_return( Iosb );
4597 }
4598 }
4599
4600 //
4601 // If this media is write protected, don't even try the create.
4602 //
4603
4604 if (FlagOn(Vcb->VcbState, VCB_STATE_FLAG_WRITE_PROTECTED)) {
4605
4606 //
4607 // Set the real device for the pop-up info, and set the verify
4608 // bit in the device object, so that we will force a verify
4609 // in case the user put the correct media back in.
4610 //
4611
4612
4613 IoSetHardErrorOrVerifyDevice( IrpContext->OriginatingIrp,
4614 Vcb->Vpb->RealDevice );
4615
4616 SetFlag(Vcb->Vpb->RealDevice->Flags, DO_VERIFY_VOLUME);
4617
4618 FatRaiseStatus( IrpContext, STATUS_MEDIA_WRITE_PROTECTED );
4619 }
4620 }
4621
4622 //
4623 // Create a new Fcb for the file, and set the file size in
4624 // the fcb.
4625 //
4626
4627 *Fcb = UnwindFcb = FatCreateFcb( IrpContext,
4628 Vcb,
4629 ParentDcb,
4630 LfnByteOffset,
4631 DirentByteOffset,
4632 Dirent,
4633 Lfn,
4634 OrigLfn,
4635 IsPagingFile,
4636 FALSE );
4637
4638
4639 (*Fcb)->Header.ValidDataLength.LowPart = (*Fcb)->Header.FileSize.LowPart;
4640
4641 //
4642 // If this is a paging file, lookup the allocation size so that
4643 // the Mcb is always valid
4644 //
4645
4646 if (IsPagingFile) {
4647
4648 FatLookupFileAllocationSize( IrpContext, *Fcb );
4649 }
4650
4651#if (NTDDI_VERSION >= NTDDI_WIN7)
4652
4653 //
4654 // Let's make sure that if the caller provided an oplock key that it
4655 // gets stored in the file object.
4656 //
4657
4658 Iosb.Status = FsRtlCheckOplockEx( FatGetFcbOplock(*Fcb),
4659 IrpContext->OriginatingIrp,
4660 OPLOCK_FLAG_OPLOCK_KEY_CHECK_ONLY,
4661 NULL,
4662 NULL,
4663 NULL );
4664
4665 //
4666 // If the caller wants atomic create-with-oplock semantics, tell
4667 // the oplock package. We haven't incremented the Fcb's UncleanCount
4668 // for this create yet, so add that in on the call.
4669 //
4670
4671 if (OpenRequiringOplock &&
4672 (Iosb.Status == STATUS_SUCCESS)) {
4673
4674 Iosb.Status = FsRtlOplockFsctrl( FatGetFcbOplock(*Fcb),
4675 IrpContext->OriginatingIrp,
4676 ((*Fcb)->UncleanCount + 1) );
4677 }
4678
4679 //
4680 // Get out if either of the above calls failed. Raise to trigger
4681 // cleanup of the new Fcb.
4682 //
4683
4684 if (Iosb.Status != STATUS_SUCCESS) {
4685
4686 NT_ASSERT( Iosb.Status != STATUS_PENDING );
4687
4688 FatRaiseStatus( IrpContext, Iosb.Status );
4689 }
4690#endif
4691
4692 //
4693 // Now case on whether we are to simply open, supersede, or
4694 // overwrite the file.
4695 //
4696
4697 switch (CreateDisposition) {
4698
4699 case FILE_OPEN:
4700 case FILE_OPEN_IF:
4701
4702 DebugTrace(0, Dbg, "Doing only an open operation\n", 0);
4703
4704 //
4705 // If the caller has no Ea knowledge, we immediately check for
4706 // Need Ea's on the file.
4707 //
4708
4709 if (NoEaKnowledge && !FatIsFat32(Vcb)) {
4710
4711 ULONG NeedEaCount;
4712
4713 FatGetNeedEaCount( IrpContext,
4714 Vcb,
4715 Dirent,
4716 &NeedEaCount );
4717
4718 if (NeedEaCount != 0) {
4719
4720 FatRaiseStatus( IrpContext, STATUS_ACCESS_DENIED );
4721 }
4722 }
4723
4724 //
4725 // Setup the context and section object pointers.
4726 //
4727
4728 FatSetFileObject( FileObject,
4729 UserFileOpen,
4730 *Fcb,
4731 UnwindCcb = FatCreateCcb( IrpContext ));
4732
4733 FileObject->SectionObjectPointer = &(*Fcb)->NonPaged->SectionObjectPointers;
4734
4735 Iosb.Status = STATUS_SUCCESS;
4736 Iosb.Information = FILE_OPENED;
4737 break;
4738
4739 case FILE_SUPERSEDE:
4740 case FILE_OVERWRITE:
4741 case FILE_OVERWRITE_IF:
4742
4743 DebugTrace(0, Dbg, "Doing supersede/overwrite operation\n", 0);
4744
4745 //
4746 // Determine the granted access for this operation now.
4747 //
4748
4749 if (!NT_SUCCESS( Iosb.Status = FatCheckSystemSecurityAccess( IrpContext ))) {
4750
4751 try_return( Iosb );
4752 }
4753
4754 Iosb = FatSupersedeOrOverwriteFile( IrpContext,
4755 FileObject,
4756 *Fcb,
4757 AllocationSize,
4758 EaBuffer,
4759 EaLength,
4760 FileAttributes,
4761 CreateDisposition,
4762 NoEaKnowledge );
4763 break;
4764
4765 default:
4766
4767 DebugTrace(0, Dbg, "Illegal Create Disposition\n", 0);
4768
4769#ifdef _MSC_VER
4770#pragma prefast( suppress:28159, "things are seriously wrong if we get here" )
4771#endif
4772 FatBugCheck( CreateDisposition, 0, 0 );
4773 break;
4774 }
4775
4776 try_exit: NOTHING;
4777
4778 //
4779 // Setup our share access and counts if things were successful.
4780 //
4781
4782 if ((Iosb.Status != STATUS_PENDING) && NT_SUCCESS( Iosb.Status )) {
4783
4784 //
4785 // Remove any virtual access the caller needed to check against, but will
4786 // not really receive. Overwrite/supersede is a bit of a special case.
4787 //
4788
4789 ClearFlag( *DesiredAccess, AddedAccess );
4790
4791 IoSetShareAccess( *DesiredAccess,
4792 ShareAccess,
4793 FileObject,
4794 &(*Fcb)->ShareAccess );
4795
4796 (*Fcb)->UncleanCount += 1;
4797 (*Fcb)->OpenCount += 1;
4798 if (FlagOn(FileObject->Flags, FO_NO_INTERMEDIATE_BUFFERING)) {
4799 (*Fcb)->NonCachedUncleanCount += 1;
4800 }
4801 Vcb->OpenFileCount += 1;
4802 if (IsFileObjectReadOnly(FileObject)) { Vcb->ReadOnlyCount += 1; }
4803
4804 CountsIncremented = TRUE;
4805 }
4806
4807 {
4808 PCCB Ccb;
4809
4810 Ccb = (PCCB)FileObject->FsContext2;
4811
4812 if ( NT_SUCCESS(Iosb.Status) ) {
4813
4814 //
4815 // Mark the DeleteOnClose bit if the operation was successful.
4816 //
4817
4818 if ( DeleteOnClose ) {
4819
4820 SetFlag( Ccb->Flags, CCB_FLAG_DELETE_ON_CLOSE );
4821 }
4822
4823 //
4824 // Mark the OpenedByShortName bit if the operation was successful.
4825 //
4826
4827 if ( FileNameOpenedDos ) {
4828
4829 SetFlag( Ccb->Flags, CCB_FLAG_OPENED_BY_SHORTNAME );
4830 }
4831
4832 //
4833 // Mark the ManageVolumeAccess bit if the privilege is held.
4834 //
4835
4836 if (FatCheckManageVolumeAccess( IrpContext,
4837 IrpSp->Parameters.Create.SecurityContext->AccessState,
4838 (KPROCESSOR_MODE)( FlagOn( IrpSp->Flags, SL_FORCE_ACCESS_CHECK ) ?
4839 UserMode :
4840 IrpContext->OriginatingIrp->RequestorMode ))) {
4841
4842 SetFlag( Ccb->Flags, CCB_FLAG_MANAGE_VOLUME_ACCESS );
4843 }
4844
4845 }
4846 }
4847
4848
4849 } _SEH2_FINALLY {
4850
4851 DebugUnwind( FatOpenExistingFile );
4852
4853 //
4854 // If this is an abnormal termination then undo our work
4855 //
4856
4857 if (_SEH2_AbnormalTermination()) {
4858
4859 if (CountsIncremented) {
4860 (*Fcb)->UncleanCount -= 1;
4861 (*Fcb)->OpenCount -= 1;
4862 if (FlagOn(FileObject->Flags, FO_NO_INTERMEDIATE_BUFFERING)) {
4863 (*Fcb)->NonCachedUncleanCount -= 1;
4864 }
4865 Vcb->OpenFileCount -= 1;
4866 if (IsFileObjectReadOnly(FileObject)) { Vcb->ReadOnlyCount -= 1; }
4867 }
4868
4869 if (UnwindFcb != NULL) {
4870 if (ARGUMENT_PRESENT( FileObject )) {
4871 FileObject->SectionObjectPointer = NULL;
4872 }
4873 FatDeleteFcb( IrpContext, &UnwindFcb );
4874 *Fcb = NULL;
4875 }
4876
4877 if (UnwindCcb != NULL) { FatDeleteCcb( IrpContext, &UnwindCcb ); }
4878 }
4879
4880 DebugTrace(-1, Dbg, "FatOpenExistingFile -> Iosb.Status = %08lx\n", Iosb.Status);
4881 } _SEH2_END;
4882
4883 return Iosb;
4884}
4885
4886
4887//
4888// Internal support routine
4889//
4890
4891_Requires_lock_held_(_Global_critical_region_)
4892IO_STATUS_BLOCK
4893FatCreateNewDirectory (
4894 _In_ PIRP_CONTEXT IrpContext,
4895 _In_ PIO_STACK_LOCATION IrpSp,
4896 _Inout_ PFILE_OBJECT FileObject,
4897 _Inout_ PVCB Vcb,
4898 _Inout_ PDCB ParentDcb,
4899 _In_ POEM_STRING OemName,
4900 _In_ PUNICODE_STRING UnicodeName,
4901 _In_ PACCESS_MASK DesiredAccess,
4902 _In_ USHORT ShareAccess,
4903 _In_ PFILE_FULL_EA_INFORMATION EaBuffer,
4904 _In_ ULONG EaLength,
4905 _In_ USHORT FileAttributes,
4906 _In_ BOOLEAN NoEaKnowledge,
4907 _In_ BOOLEAN DeleteOnClose,
4908 _In_ BOOLEAN OpenRequiringOplock
4909 )
4910
4911/*++
4912
4913Routine Description:
4914
4915 This routine creates a new directory. The directory has already been
4916 verified not to exist yet.
4917
4918Arguments:
4919
4920 FileObject - Supplies the file object for the newly created directory
4921
4922 Vcb - Supplies the Vcb denote the volume to contain the new directory
4923
4924 ParentDcb - Supplies the parent directory containg the newly created
4925 directory
4926
4927 OemName - Supplies the Oem name for the newly created directory. It may
4928 or maynot be 8.3 complient, but will be upcased.
4929
4930 UnicodeName - Supplies the Unicode name for the newly created directory.
4931 It may or maynot be 8.3 complient. This name contains the original
4932 case information.
4933
4934 DesiredAccess - Supplies the desired access of the caller
4935
4936 ShareAccess - Supplies the shared access of the caller
4937
4938 EaBuffer - Supplies the Ea set for the newly created directory
4939
4940 EaLength - Supplies the length, in bytes, of EaBuffer
4941
4942 FileAttributes - Supplies the file attributes for the newly created
4943 directory.
4944
4945 NoEaKnowledge - This opener doesn't understand Ea's and we fail this
4946 open if the file has NeedEa's.
4947
4948 DeleteOnClose - The caller wants the file gone when the handle is closed
4949
4950 OpenRequiringOplock - The caller provided the FILE_OPEN_REQUIRING_OPLOCK option.
4951
4952Return Value:
4953
4954 IO_STATUS_BLOCK - Returns the completion status for the operation
4955
4956--*/
4957
4958{
4959 IO_STATUS_BLOCK Iosb;
4960
4961 PDCB Dcb = NULL;
4962 PCCB Ccb = NULL;
4963
4964 PDIRENT Dirent = NULL;
4965 PBCB DirentBcb = NULL;
4966 ULONG DirentsNeeded;
4967 ULONG DirentByteOffset;
4968
4969 PDIRENT ShortDirent;
4970 ULONG ShortDirentByteOffset;
4971
4972 USHORT EaHandle;
4973
4974 BOOLEAN AllLowerComponent;
4975 BOOLEAN AllLowerExtension;
4976 BOOLEAN CreateLfn;
4977
4978 ULONG BytesInFirstPage = 0;
4979 ULONG DirentsInFirstPage = 0;
4980 PDIRENT FirstPageDirent = 0;
4981
4982 PBCB SecondPageBcb = NULL;
4983 ULONG SecondPageOffset;
4984 PDIRENT SecondPageDirent = NULL;
4985
4986 BOOLEAN DirentFromPool = FALSE;
4987
4988
4989 OEM_STRING ShortName;
4990 UCHAR ShortNameBuffer[12];
4991
4992#if (NTDDI_VERSION <= NTDDI_WIN7)
4993 UNREFERENCED_PARAMETER( OpenRequiringOplock );
4994#endif
4995
4996 UNREFERENCED_PARAMETER( IrpSp );
4997
4998 PAGED_CODE();
4999
5000 DebugTrace(+1, Dbg, "FatCreateNewDirectory...\n", 0);
5001
5002 ShortName.Length = 0;
5003 ShortName.MaximumLength = 12;
5004 ShortName.Buffer = (PCHAR)&ShortNameBuffer[0];
5005
5006 EaHandle = 0;
5007
5008 //
5009 // We fail this operation if the caller doesn't understand Ea's.
5010 //
5011
5012 if (NoEaKnowledge
5013 && EaLength > 0) {
5014
5015 Iosb.Status = STATUS_ACCESS_DENIED;
5016
5017 DebugTrace(-1, Dbg, "FatCreateNewDirectory -> Iosb.Status = %08lx\n", Iosb.Status);
5018 return Iosb;
5019 }
5020
5021 //
5022 // DeleteOnClose and ReadOnly are not compatible.
5023 //
5024
5025 if (DeleteOnClose && FlagOn(FileAttributes, FAT_DIRENT_ATTR_READ_ONLY)) {
5026
5027 Iosb.Status = STATUS_CANNOT_DELETE;
5028 return Iosb;
5029 }
5030
5031 // Now get the names that we will be using.
5032 //
5033
5034 FatSelectNames( IrpContext,
5035 ParentDcb,
5036 OemName,
5037 UnicodeName,
5038 &ShortName,
5039 NULL,
5040 &AllLowerComponent,
5041 &AllLowerExtension,
5042 &CreateLfn );
5043
5044 //
5045 // If we are not in Chicago mode, ignore the magic bits.
5046 //
5047
5048 if (!FatData.ChicagoMode) {
5049
5050 AllLowerComponent = FALSE;
5051 AllLowerExtension = FALSE;
5052 CreateLfn = FALSE;
5053 }
5054
5055 //
5056 // Create/allocate a new dirent
5057 //
5058
5059 DirentsNeeded = CreateLfn ? FAT_LFN_DIRENTS_NEEDED(UnicodeName) + 1 : 1;
5060
5061 DirentByteOffset = FatCreateNewDirent( IrpContext,
5062 ParentDcb,
5063 DirentsNeeded,
5064 FALSE );
5065 _SEH2_TRY {
5066
5067 FatPrepareWriteDirectoryFile( IrpContext,
5068 ParentDcb,
5069 DirentByteOffset,
5070 sizeof(DIRENT),
5071 &DirentBcb,
5072#ifndef __REACTOS__
5073 &Dirent,
5074#else
5075 (PVOID *)&Dirent,
5076#endif
5077 FALSE,
5078 TRUE,
5079 &Iosb.Status );
5080
5081 NT_ASSERT( NT_SUCCESS( Iosb.Status ) && DirentBcb && Dirent );
5082
5083 //
5084 // Deal with the special case of an LFN + Dirent structure crossing
5085 // a page boundry.
5086 //
5087
5088 if ((DirentByteOffset / PAGE_SIZE) !=
5089 ((DirentByteOffset + (DirentsNeeded - 1) * sizeof(DIRENT)) / PAGE_SIZE)) {
5090
5091 SecondPageBcb;
5092 SecondPageOffset;
5093 SecondPageDirent;
5094
5095 SecondPageOffset = (DirentByteOffset & ~(PAGE_SIZE - 1)) + PAGE_SIZE;
5096
5097 BytesInFirstPage = SecondPageOffset - DirentByteOffset;
5098
5099 DirentsInFirstPage = BytesInFirstPage / sizeof(DIRENT);
5100
5101 FatPrepareWriteDirectoryFile( IrpContext,
5102 ParentDcb,
5103 SecondPageOffset,
5104 sizeof(DIRENT),
5105 &SecondPageBcb,
5106#ifndef __REACTOS__
5107 &SecondPageDirent,
5108#else
5109 (PVOID *)&SecondPageDirent,
5110#endif
5111 FALSE,
5112 TRUE,
5113 &Iosb.Status );
5114
5115 NT_ASSERT( NT_SUCCESS( Iosb.Status ) && SecondPageBcb && SecondPageDirent );
5116
5117 FirstPageDirent = Dirent;
5118
5119 Dirent = FsRtlAllocatePoolWithTag( PagedPool,
5120 DirentsNeeded * sizeof(DIRENT),
5121 TAG_DIRENT );
5122
5123 DirentFromPool = TRUE;
5124 }
5125
5126 //
5127 // Bump up Dirent and DirentByteOffset
5128 //
5129
5130 ShortDirent = Dirent + DirentsNeeded - 1;
5131 ShortDirentByteOffset = DirentByteOffset +
5132 (DirentsNeeded - 1) * sizeof(DIRENT);
5133
5134 NT_ASSERT( NT_SUCCESS( Iosb.Status ));
5135
5136
5137 //
5138 // Fill in the fields of the dirent.
5139 //
5140
5141 FatConstructDirent( IrpContext,
5142 ShortDirent,
5143 &ShortName,
5144 AllLowerComponent,
5145 AllLowerExtension,
5146 CreateLfn ? UnicodeName : NULL,
5147 FileAttributes | FAT_DIRENT_ATTR_DIRECTORY,
5148 TRUE,
5149 NULL );
5150
5151 //
5152 // If the dirent crossed pages, we have to do some real gross stuff.
5153 //
5154
5155 if (DirentFromPool) {
5156
5157 RtlCopyMemory( FirstPageDirent, Dirent, BytesInFirstPage );
5158
5159 RtlCopyMemory( SecondPageDirent,
5160 Dirent + DirentsInFirstPage,
5161 DirentsNeeded*sizeof(DIRENT) - BytesInFirstPage );
5162
5163 ShortDirent = SecondPageDirent + (DirentsNeeded - DirentsInFirstPage) - 1;
5164 }
5165
5166 //
5167 // Create a new dcb for the directory.
5168 //
5169
5170 Dcb = FatCreateDcb( IrpContext,
5171 Vcb,
5172 ParentDcb,
5173 DirentByteOffset,
5174 ShortDirentByteOffset,
5175 ShortDirent,
5176 CreateLfn ? UnicodeName : NULL );
5177
5178#if (NTDDI_VERSION >= NTDDI_WIN8)
5179 //
5180 // The next three FsRtl calls are for oplock work. We deliberately
5181 // do these here so that if either call fails we will be able to
5182 // clean up without adding a bunch of code to unwind counts, fix
5183 // the file object, etc.
5184 //
5185
5186 //
5187 // Let's make sure that if the caller provided an oplock key that it
5188 // gets stored in the file object.
5189 //
5190
5191 Iosb.Status = FsRtlCheckOplockEx( FatGetFcbOplock(Dcb),
5192 IrpContext->OriginatingIrp,
5193 OPLOCK_FLAG_OPLOCK_KEY_CHECK_ONLY,
5194 NULL,
5195 NULL,
5196 NULL );
5197
5198 //
5199 // If the caller wants atomic create-with-oplock semantics, tell
5200 // the oplock package. We haven't incremented the Dcb's UncleanCount
5201 // for this create yet, so add that in on the call.
5202 //
5203
5204 if (OpenRequiringOplock &&
5205 (Iosb.Status == STATUS_SUCCESS)) {
5206
5207 Iosb.Status = FsRtlOplockFsctrl( FatGetFcbOplock(Dcb),
5208 IrpContext->OriginatingIrp,
5209 (Dcb->UncleanCount + 1) );
5210 }
5211
5212 //
5213 // Break parent directory oplock. Directory oplock breaks are always
5214 // advisory, so we will never block/get STATUS_PENDING here. On the
5215 // off chance this fails with INSUFFICIENT_RESOURCES we do it here
5216 // where we can still tolerate a failure.
5217 //
5218
5219 if (Iosb.Status == STATUS_SUCCESS) {
5220
5221 Iosb.Status = FsRtlCheckOplockEx( FatGetFcbOplock(ParentDcb),
5222 IrpContext->OriginatingIrp,
5223 OPLOCK_FLAG_PARENT_OBJECT,
5224 NULL,
5225 NULL,
5226 NULL );
5227 }
5228
5229 //
5230 // Get out if any of the oplock calls failed.
5231 //
5232
5233 if (Iosb.Status != STATUS_SUCCESS) {
5234
5235 FatRaiseStatus( IrpContext, Iosb.Status );
5236 }
5237#endif
5238
5239 //
5240 // Tentatively add the new Ea's,
5241 //
5242
5243 if (EaLength > 0) {
5244
5245 //
5246 // This returns false if we are trying to create a file
5247 // with Need Ea's and don't understand EA's.
5248 //
5249
5250 FatCreateEa( IrpContext,
5251 Dcb->Vcb,
5252 (PUCHAR) EaBuffer,
5253 EaLength,
5254 &Dcb->ShortName.Name.Oem,
5255 &EaHandle );
5256 }
5257
5258 if (!FatIsFat32(Dcb->Vcb)) {
5259
5260 ShortDirent->ExtendedAttributes = EaHandle;
5261 }
5262
5263 //
5264 // After this point we cannot just simply mark the dirent deleted,
5265 // we have to deal with the directory file object.
5266 //
5267
5268 //
5269 // Make the dirent into a directory. Note that even if this call
5270 // raises because of disk space, the diectory file object has been
5271 // created.
5272 //
5273
5274 FatInitializeDirectoryDirent( IrpContext, Dcb, ShortDirent );
5275
5276 //
5277 // Setup the context and section object pointers, and update
5278 // our reference counts. Note that this call cannot fail.
5279 //
5280
5281 FatSetFileObject( FileObject,
5282 UserDirectoryOpen,
5283 Dcb,
5284 Ccb = FatCreateCcb( IrpContext ) );
5285
5286 //
5287 // Initialize the LongFileName if it has not already been set, so that
5288 // FatNotify below won't have to. If there are filesystem filters
5289 // attached to FAT, the LongFileName could have gotten set if the
5290 // filter queried for name information on this file object while
5291 // watching the IO needed in FatInitializeDirectoryDirent.
5292 //
5293
5294 if (Dcb->FullFileName.Buffer == NULL) {
5295
5296 FatSetFullNameInFcb( IrpContext, Dcb, UnicodeName );
5297 }
5298
5299 //
5300 // We call the notify package to report that the
5301 // we added a file.
5302 //
5303
5304 FatNotifyReportChange( IrpContext,
5305 Vcb,
5306 Dcb,
5307 FILE_NOTIFY_CHANGE_DIR_NAME,
5308 FILE_ACTION_ADDED );
5309
5310 //
5311 // Setup our share access
5312 //
5313
5314 IoSetShareAccess( *DesiredAccess,
5315 ShareAccess,
5316 FileObject,
5317 &Dcb->ShareAccess );
5318
5319
5320 //
5321 // From this point on, nothing can raise.
5322 //
5323
5324 Dcb->UncleanCount += 1;
5325 Dcb->OpenCount += 1;
5326 Vcb->OpenFileCount += 1;
5327 if (IsFileObjectReadOnly(FileObject)) { Vcb->ReadOnlyCount += 1; }
5328
5329 if (DeleteOnClose) {
5330
5331 SetFlag( Ccb->Flags, CCB_FLAG_DELETE_ON_CLOSE );
5332 }
5333
5334 //
5335 // And set our return status
5336 //
5337
5338 Iosb.Status = STATUS_SUCCESS;
5339 Iosb.Information = FILE_CREATED;
5340
5341 } _SEH2_EXCEPT(FatExceptionFilter( IrpContext, _SEH2_GetExceptionInformation() )) {
5342
5343 //
5344 // We'll catch all exceptions and handle them below.
5345 //
5346
5347 Iosb.Status = IrpContext->ExceptionStatus;
5348 } _SEH2_END;
5349
5350 //
5351 // If we failed then undo our work.
5352 //
5353
5354 if (!NT_SUCCESS( Iosb.Status )) {
5355
5356 //
5357 // We always have to delete the Ccb if we created one.
5358 //
5359
5360 if ( Ccb != NULL ) {
5361
5362 FatDeleteCcb( IrpContext, &Ccb );
5363 }
5364
5365#ifdef _MSC_VER
5366#pragma prefast( suppress: 28924, "prefast thinks this test is redundant, but DCB can be NULL depending on where we raise" )
5367#endif
5368 if ( Dcb == NULL) {
5369
5370 NT_ASSERT( (ParentDcb->Specific.Dcb.UnusedDirentVbo == 0xffffffff) ||
5371 RtlAreBitsSet( &ParentDcb->Specific.Dcb.FreeDirentBitmap,
5372 DirentByteOffset / sizeof(DIRENT),
5373 DirentsNeeded ) );
5374
5375 RtlClearBits( &ParentDcb->Specific.Dcb.FreeDirentBitmap,
5376 DirentByteOffset / sizeof(DIRENT),
5377 DirentsNeeded );
5378
5379 //
5380 // Mark the dirents deleted. The codes is complex because of
5381 // dealing with an LFN than crosses a page boundry.
5382 //
5383
5384 if (Dirent != NULL) {
5385
5386 ULONG i;
5387
5388 //
5389 // We failed before creating a directory file object.
5390 // We can just mark the dirent deleted and exit.
5391 //
5392
5393 for (i = 0; i < DirentsNeeded; i++) {
5394
5395 if (DirentFromPool == FALSE) {
5396
5397 //
5398 // Simple case.
5399 //
5400
5401 Dirent[i].FileName[0] = FAT_DIRENT_DELETED;
5402
5403 } else {
5404
5405 //
5406 // If the second CcPreparePinWrite failed, we have
5407 // to stop early.
5408 //
5409
5410 if ((SecondPageBcb == NULL) &&
5411 (i == DirentsInFirstPage)) {
5412
5413 break;
5414 }
5415
5416 //
5417 // Now conditionally update either page.
5418 //
5419
5420 if (i < DirentsInFirstPage) {
5421
5422 FirstPageDirent[i].FileName[0] = FAT_DIRENT_DELETED;
5423
5424 } else {
5425
5426 SecondPageDirent[i - DirentsInFirstPage].FileName[0] = FAT_DIRENT_DELETED;
5427 }
5428 }
5429 }
5430 }
5431 }
5432 }
5433
5434 //
5435 // Just drop the Bcbs we have in the parent right now so if we
5436 // failed to create the directory and we take the path to rip apart
5437 // the partially created child, when we sync-uninit we won't cause
5438 // a lazy writer processing the parent to block on us. This would
5439 // consume one of the lazy writers, one of which must be running free
5440 // in order for us to come back from the sync-uninit.
5441 //
5442 // Neat, huh?
5443 //
5444 // Granted, the delete dirent below will be marginally less efficient
5445 // since the Bcb may be reclaimed by the time it executes. Life is
5446 // tough.
5447 //
5448
5449 FatUnpinBcb( IrpContext, DirentBcb );
5450 FatUnpinBcb( IrpContext, SecondPageBcb );
5451
5452 if (DirentFromPool) {
5453
5454 ExFreePool( Dirent );
5455 }
5456
5457 if (!NT_SUCCESS( Iosb.Status )) {
5458
5459#ifdef _MSC_VER
5460#pragma prefast( suppress: 28924, "prefast thinks this test is redundant, but DCB can be NULL depending on where we raise" )
5461#endif
5462 if (Dcb != NULL) {
5463
5464 //
5465 // We have created the Dcb. If an error occurred while
5466 // creating the Ea's, there will be no directory file
5467 // object.
5468 //
5469
5470 PFILE_OBJECT DirectoryFileObject;
5471
5472 DirectoryFileObject = Dcb->Specific.Dcb.DirectoryFile;
5473
5474 //
5475 // Knock down all of the repinned data so we can begin to destroy
5476 // this failed child. We don't care about any raising here - we're
5477 // already got a fire going.
5478 //
5479 // Note that if we failed to do this, the repinned initial pieces
5480 // of the child would cause the sync-uninit to block forever.
5481 //
5482 // A previous spin on this fix had us not make the ./.. creation
5483 // "reversible" (bad term) and thus avoid having the Bcb still
5484 // outstanding. This wound up causing very bad things to happen
5485 // on DMF floppies when we tried to do a similar yank-down in the
5486 // create path - we want the purge it does to make sure we never
5487 // try to write the bytes out ... it is just a lot cleaner to
5488 // unpinrepin. I'll leave the reversible logic in place if it ever
5489 // proves useful.
5490 //
5491
5492 //
5493 // There is a possibility that this may be a generally good idea
5494 // for "live" finally clauses - set in ExceptionFilter, clear in
5495 // ProcessException. Think about this.
5496 //
5497
5498 SetFlag( IrpContext->Flags, IRP_CONTEXT_FLAG_DISABLE_RAISE );
5499 FatUnpinRepinnedBcbs( IrpContext );
5500 ClearFlag( IrpContext->Flags, IRP_CONTEXT_FLAG_DISABLE_RAISE );
5501
5502 if (Dcb->FirstClusterOfFile != 0) {
5503
5504 _SEH2_TRY {
5505
5506 Dcb->Header.FileSize.LowPart = 0;
5507
5508 CcSetFileSizes( Dcb->Specific.Dcb.DirectoryFile,
5509 (PCC_FILE_SIZES)&Dcb->Header.AllocationSize );
5510
5511 //
5512 // Now zap the allocation backing it.
5513 //
5514
5515 FatTruncateFileAllocation( IrpContext, Dcb, 0 );
5516
5517 } _SEH2_EXCEPT(FatExceptionFilter( IrpContext, _SEH2_GetExceptionInformation() )) {
5518
5519 //
5520 // We catch all exceptions that Fat catches, but don't do
5521 // anything with them.
5522 //
5523 } _SEH2_END;
5524 }
5525
5526 if (DirectoryFileObject != NULL) {
5527
5528 FatSyncUninitializeCacheMap( IrpContext,
5529 DirectoryFileObject );
5530 }
5531
5532
5533 _SEH2_TRY {
5534
5535 //
5536 // Remove the directory entry we made in the parent Dcb.
5537 //
5538
5539 FatDeleteDirent( IrpContext, Dcb, NULL, TRUE );
5540
5541 //
5542 // FatDeleteDirent can pin and dirty BCBs, so lets unrepin again.
5543 //
5544
5545 FatUnpinRepinnedBcbs( IrpContext );
5546
5547 } _SEH2_EXCEPT(FatExceptionFilter( IrpContext, _SEH2_GetExceptionInformation() )) {
5548
5549 //
5550 // We catch all exceptions that Fat catches, but don't do
5551 // anything with them.
5552 //
5553 } _SEH2_END;
5554
5555 //
5556 // Finaly, dereference the directory file object. This will
5557 // cause a close Irp to be processed, blowing away the Fcb.
5558 //
5559
5560 if (DirectoryFileObject != NULL) {
5561
5562 //
5563 // Dereference the file object for this DCB. The DCB will
5564 // go away when this file object is closed.
5565 //
5566
5567 Dcb->Specific.Dcb.DirectoryFile = NULL;
5568 ObDereferenceObject( DirectoryFileObject );
5569
5570 } else {
5571
5572 //
5573 // This was also a PDK fix. If the stream file exists, this would
5574 // be done during the dereference file object operation. Otherwise
5575 // we have to remove the Dcb and check if we should remove the parent.
5576 // For now we will just leave the parent lying around.
5577 //
5578
5579#ifdef _MSC_VER
5580#pragma prefast( suppress: 28924, "prefast thinks this test is redundant, but FileObject can be NULL depending on where we raise" )
5581#endif
5582 if (ARGUMENT_PRESENT( FileObject )) {
5583 FileObject->SectionObjectPointer = NULL;
5584 }
5585 FatDeleteFcb( IrpContext, &Dcb );
5586 }
5587 }
5588
5589 DebugTrace(-1, Dbg, "FatCreateNewDirectory -> Iosb.Status = %08lx\n", Iosb.Status);
5590
5591 FatRaiseStatus( IrpContext, Iosb.Status );
5592 }
5593
5594 UNREFERENCED_PARAMETER( EaBuffer );
5595 UNREFERENCED_PARAMETER( EaLength );
5596
5597 return Iosb;
5598}
5599
5600
5601//
5602// Internal support routine
5603//
5604
5605_Requires_lock_held_(_Global_critical_region_)
5606IO_STATUS_BLOCK
5607FatCreateNewFile (
5608 _In_ PIRP_CONTEXT IrpContext,
5609 _In_ PIO_STACK_LOCATION IrpSp,
5610 _Inout_ PFILE_OBJECT FileObject,
5611 _Inout_ PVCB Vcb,
5612 _Inout_ PDCB ParentDcb,
5613 _In_ POEM_STRING OemName,
5614 _In_ PUNICODE_STRING UnicodeName,
5615 _In_ PACCESS_MASK DesiredAccess,
5616 _In_ USHORT ShareAccess,
5617 _In_ ULONG AllocationSize,
5618 _In_ PFILE_FULL_EA_INFORMATION EaBuffer,
5619 _In_ ULONG EaLength,
5620 _In_ USHORT FileAttributes,
5621 _In_ PUNICODE_STRING LfnBuffer,
5622 _In_ BOOLEAN IsPagingFile,
5623 _In_ BOOLEAN NoEaKnowledge,
5624 _In_ BOOLEAN DeleteOnClose,
5625 _In_ BOOLEAN OpenRequiringOplock,
5626 _In_ BOOLEAN TemporaryFile
5627 )
5628
5629/*++
5630
5631Routine Description:
5632
5633 This routine creates a new file. The file has already been verified
5634 not to exist yet.
5635
5636Arguments:
5637
5638 FileObject - Supplies the file object for the newly created file
5639
5640 Vcb - Supplies the Vcb denote the volume to contain the new file
5641
5642 ParentDcb - Supplies the parent directory containg the newly created
5643 File
5644
5645 OemName - Supplies the Oem name for the newly created file. It may
5646 or maynot be 8.3 complient, but will be upcased.
5647
5648 UnicodeName - Supplies the Unicode name for the newly created file.
5649 It may or maynot be 8.3 complient. This name contains the original
5650 case information.
5651
5652 DesiredAccess - Supplies the desired access of the caller
5653
5654 ShareAccess - Supplies the shared access of the caller
5655
5656 AllocationSize - Supplies the initial allocation size for the file
5657
5658 EaBuffer - Supplies the Ea set for the newly created file
5659
5660 EaLength - Supplies the length, in bytes, of EaBuffer
5661
5662 FileAttributes - Supplies the file attributes for the newly created
5663 file
5664
5665 LfnBuffer - A MAX_LFN sized buffer for directory searching
5666
5667 IsPagingFile - Indicates if this is the paging file being created
5668
5669 NoEaKnowledge - This opener doesn't understand Ea's and we fail this
5670 open if the file has NeedEa's.
5671
5672 DeleteOnClose - The caller wants the file gone when the handle is closed
5673
5674 OpenRequiringOplock - The caller provided the FILE_OPEN_REQUIRING_OPLOCK option.
5675
5676 TemporaryFile - Signals the lazywriter to not write dirty data unless
5677 absolutely has to.
5678
5679
5680Return Value:
5681
5682 IO_STATUS_BLOCK - Returns the completion status for the operation
5683
5684--*/
5685
5686{
5687 IO_STATUS_BLOCK Iosb = {0};
5688
5689 PFCB Fcb = NULL;
5690
5691 PDIRENT Dirent = NULL;
5692 PBCB DirentBcb = NULL;
5693 ULONG DirentsNeeded;
5694 ULONG DirentByteOffset;
5695
5696 PDIRENT ShortDirent;
5697 ULONG ShortDirentByteOffset;
5698
5699 USHORT EaHandle;
5700
5701 BOOLEAN AllLowerComponent;
5702 BOOLEAN AllLowerExtension;
5703 BOOLEAN CreateLfn;
5704
5705 ULONG BytesInFirstPage = 0;
5706 ULONG DirentsInFirstPage = 0;
5707 PDIRENT FirstPageDirent = NULL;
5708
5709 PBCB SecondPageBcb = NULL;
5710 ULONG SecondPageOffset;
5711 PDIRENT SecondPageDirent = NULL;
5712
5713 BOOLEAN DirentFromPool = FALSE;
5714
5715 OEM_STRING ShortName;
5716 UCHAR ShortNameBuffer[12];
5717
5718 UNICODE_STRING UniTunneledShortName;
5719 WCHAR UniTunneledShortNameBuffer[12];
5720 UNICODE_STRING UniTunneledLongName;
5721 WCHAR UniTunneledLongNameBuffer[26];
5722 LARGE_INTEGER TunneledCreationTime;
5723 ULONG TunneledDataSize;
5724 BOOLEAN HaveTunneledInformation;
5725 BOOLEAN UsingTunneledLfn = FALSE;
5726
5727 PUNICODE_STRING RealUnicodeName;
5728
5729
5730 //
5731 // The following variables are for abnormal termination
5732 //
5733
5734 PDIRENT UnwindDirent = NULL;
5735 PFCB UnwindFcb = NULL;
5736 BOOLEAN UnwindAllocation = FALSE;
5737 BOOLEAN CountsIncremented = FALSE;
5738 PCCB UnwindCcb = NULL;
5739
5740 ULONG LocalAbnormalTermination = FALSE;
5741
5742#if (NTDDI_VERSION < NTDDI_WIN7)
5743 UNREFERENCED_PARAMETER( OpenRequiringOplock );
5744#endif
5745
5746 PAGED_CODE();
5747
5748 DebugTrace(+1, Dbg, "FatCreateNewFile...\n", 0);
5749
5750 ShortName.Length = 0;
5751 ShortName.MaximumLength = sizeof(ShortNameBuffer);
5752 ShortName.Buffer = (PCHAR)&ShortNameBuffer[0];
5753
5754 UniTunneledShortName.Length = 0;
5755 UniTunneledShortName.MaximumLength = sizeof(UniTunneledShortNameBuffer);
5756 UniTunneledShortName.Buffer = &UniTunneledShortNameBuffer[0];
5757
5758 UniTunneledLongName.Length = 0;
5759 UniTunneledLongName.MaximumLength = sizeof(UniTunneledLongNameBuffer);
5760 UniTunneledLongName.Buffer = &UniTunneledLongNameBuffer[0];
5761
5762 EaHandle = 0;
5763
5764 //
5765 // We fail this operation if the caller doesn't understand Ea's.
5766 //
5767
5768 if (NoEaKnowledge
5769 && EaLength > 0) {
5770
5771 Iosb.Status = STATUS_ACCESS_DENIED;
5772
5773 DebugTrace(-1, Dbg, "FatCreateNewFile -> Iosb.Status = %08lx\n", Iosb.Status);
5774 return Iosb;
5775 }
5776
5777 //
5778 // DeleteOnClose and ReadOnly are not compatible.
5779 //
5780
5781 if (DeleteOnClose && FlagOn(FileAttributes, FAT_DIRENT_ATTR_READ_ONLY)) {
5782
5783 Iosb.Status = STATUS_CANNOT_DELETE;
5784 return Iosb;
5785 }
5786
5787 //
5788 // Look in the tunnel cache for names and timestamps to restore
5789 //
5790
5791 TunneledDataSize = sizeof(LARGE_INTEGER);
5792 HaveTunneledInformation = FsRtlFindInTunnelCache( &Vcb->Tunnel,
5793 FatDirectoryKey(ParentDcb),
5794 UnicodeName,
5795 &UniTunneledShortName,
5796 &UniTunneledLongName,
5797 &TunneledDataSize,
5798 &TunneledCreationTime );
5799 NT_ASSERT(TunneledDataSize == sizeof(LARGE_INTEGER));
5800
5801 //
5802 // Now get the names that we will be using.
5803 //
5804
5805 FatSelectNames( IrpContext,
5806 ParentDcb,
5807 OemName,
5808 UnicodeName,
5809 &ShortName,
5810 (HaveTunneledInformation? &UniTunneledShortName : NULL),
5811 &AllLowerComponent,
5812 &AllLowerExtension,
5813 &CreateLfn );
5814
5815 //
5816 // If we are not in Chicago mode, ignore the magic bits.
5817 //
5818
5819 RealUnicodeName = UnicodeName;
5820
5821 if (!FatData.ChicagoMode) {
5822
5823 AllLowerComponent = FALSE;
5824 AllLowerExtension = FALSE;
5825 CreateLfn = FALSE;
5826
5827 } else {
5828
5829 //
5830 // If the Unicode name was legal for a short name and we got
5831 // a tunneling hit which had a long name associated which is
5832 // avaliable for use, use it.
5833 //
5834
5835 if (!CreateLfn &&
5836 UniTunneledLongName.Length &&
5837 !FatLfnDirentExists(IrpContext, ParentDcb, &UniTunneledLongName, LfnBuffer)) {
5838
5839 UsingTunneledLfn = TRUE;
5840 CreateLfn = TRUE;
5841
5842 RealUnicodeName = &UniTunneledLongName;
5843
5844 //
5845 // Short names are always upcase if an LFN exists
5846 //
5847
5848 AllLowerComponent = FALSE;
5849 AllLowerExtension = FALSE;
5850 }
5851 }
5852
5853
5854 //
5855 // Create/allocate a new dirent
5856 //
5857
5858 DirentsNeeded = CreateLfn ? FAT_LFN_DIRENTS_NEEDED(RealUnicodeName) + 1 : 1;
5859
5860 DirentByteOffset = FatCreateNewDirent( IrpContext,
5861 ParentDcb,
5862 DirentsNeeded,
5863 FALSE );
5864
5865 _SEH2_TRY {
5866
5867 FatPrepareWriteDirectoryFile( IrpContext,
5868 ParentDcb,
5869 DirentByteOffset,
5870 sizeof(DIRENT),
5871 &DirentBcb,
5872#ifndef __REACTOS__
5873 &Dirent,
5874#else
5875 (PVOID *)&Dirent,
5876#endif
5877 FALSE,
5878 TRUE,
5879 &Iosb.Status );
5880
5881 NT_ASSERT( NT_SUCCESS( Iosb.Status ) );
5882
5883 UnwindDirent = Dirent;
5884
5885 //
5886 // Deal with the special case of an LFN + Dirent structure crossing
5887 // a page boundry.
5888 //
5889
5890 if ((DirentByteOffset / PAGE_SIZE) !=
5891 ((DirentByteOffset + (DirentsNeeded - 1) * sizeof(DIRENT)) / PAGE_SIZE)) {
5892
5893 SecondPageBcb;
5894 SecondPageOffset;
5895 SecondPageDirent;
5896
5897 SecondPageOffset = (DirentByteOffset & ~(PAGE_SIZE - 1)) + PAGE_SIZE;
5898
5899 BytesInFirstPage = SecondPageOffset - DirentByteOffset;
5900
5901 DirentsInFirstPage = BytesInFirstPage / sizeof(DIRENT);
5902
5903 FatPrepareWriteDirectoryFile( IrpContext,
5904 ParentDcb,
5905 SecondPageOffset,
5906 sizeof(DIRENT),
5907 &SecondPageBcb,
5908#ifndef __REACTOS__
5909 &SecondPageDirent,
5910#else
5911 (PVOID *)&SecondPageDirent,
5912#endif
5913 FALSE,
5914 TRUE,
5915 &Iosb.Status );
5916
5917 NT_ASSERT( NT_SUCCESS( Iosb.Status ) );
5918
5919 FirstPageDirent = Dirent;
5920
5921 Dirent = FsRtlAllocatePoolWithTag( PagedPool,
5922 DirentsNeeded * sizeof(DIRENT),
5923 TAG_DIRENT );
5924
5925 DirentFromPool = TRUE;
5926 }
5927
5928 //
5929 // Bump up Dirent and DirentByteOffset
5930 //
5931
5932 ShortDirent = Dirent + DirentsNeeded - 1;
5933 ShortDirentByteOffset = DirentByteOffset +
5934 (DirentsNeeded - 1) * sizeof(DIRENT);
5935
5936 NT_ASSERT( NT_SUCCESS( Iosb.Status ));
5937
5938
5939 //
5940 // Fill in the fields of the dirent.
5941 //
5942
5943 FatConstructDirent( IrpContext,
5944 ShortDirent,
5945 &ShortName,
5946 AllLowerComponent,
5947 AllLowerExtension,
5948 CreateLfn ? RealUnicodeName : NULL,
5949 (FileAttributes | FILE_ATTRIBUTE_ARCHIVE),
5950 TRUE,
5951 (HaveTunneledInformation ? &TunneledCreationTime : NULL) );
5952
5953 //
5954 // If the dirent crossed pages, we have to do some real gross stuff.
5955 //
5956
5957 if (DirentFromPool) {
5958
5959 RtlCopyMemory( FirstPageDirent, Dirent, BytesInFirstPage );
5960
5961 RtlCopyMemory( SecondPageDirent,
5962 Dirent + DirentsInFirstPage,
5963 DirentsNeeded*sizeof(DIRENT) - BytesInFirstPage );
5964
5965 ShortDirent = SecondPageDirent + (DirentsNeeded - DirentsInFirstPage) - 1;
5966 }
5967
5968 //
5969 // Create a new Fcb for the file. Once the Fcb is created we
5970 // will not need to unwind dirent because delete dirent will
5971 // now do the work.
5972 //
5973
5974 Fcb = UnwindFcb = FatCreateFcb( IrpContext,
5975 Vcb,
5976 ParentDcb,
5977 DirentByteOffset,
5978 ShortDirentByteOffset,
5979 ShortDirent,
5980 CreateLfn ? RealUnicodeName : NULL,
5981 CreateLfn ? RealUnicodeName : NULL,
5982 IsPagingFile,
5983 FALSE );
5984 UnwindDirent = NULL;
5985
5986#if (NTDDI_VERSION >= NTDDI_WIN7)
5987 //
5988 // The next three FsRtl calls are for oplock work. We deliberately
5989 // do these here so that if either call fails we will be able to
5990 // clean up without adding a bunch of code to unwind counts, fix
5991 // the file object, etc.
5992 //
5993
5994 //
5995 // Let's make sure that if the caller provided an oplock key that it
5996 // gets stored in the file object.
5997 //
5998
5999 Iosb.Status = FsRtlCheckOplockEx( FatGetFcbOplock(Fcb),
6000 IrpContext->OriginatingIrp,
6001 OPLOCK_FLAG_OPLOCK_KEY_CHECK_ONLY,
6002 NULL,
6003 NULL,
6004 NULL );
6005
6006 //
6007 // If the caller wants atomic create-with-oplock semantics, tell
6008 // the oplock package. We haven't incremented the Fcb's UncleanCount
6009 // for this create yet, so add that in on the call.
6010 //
6011
6012 if (OpenRequiringOplock &&
6013 (Iosb.Status == STATUS_SUCCESS)) {
6014
6015 Iosb.Status = FsRtlOplockFsctrl( FatGetFcbOplock(Fcb),
6016 IrpContext->OriginatingIrp,
6017 (Fcb->UncleanCount + 1) );
6018 }
6019#endif
6020
6021#if (NTDDI_VERSION >= NTDDI_WIN8)
6022 //
6023 // Break parent directory oplock. Directory oplock breaks are always
6024 // advisory, so we will never block/get STATUS_PENDING here. On the
6025 // off chance this fails with INSUFFICIENT_RESOURCES we do it here
6026 // where we can still tolerate a failure.
6027 //
6028
6029 if (Iosb.Status == STATUS_SUCCESS) {
6030
6031 Iosb.Status = FsRtlCheckOplockEx( FatGetFcbOplock(ParentDcb),
6032 IrpContext->OriginatingIrp,
6033 OPLOCK_FLAG_PARENT_OBJECT,
6034 NULL,
6035 NULL,
6036 NULL );
6037 }
6038
6039 //
6040 // Get out if any of the oplock calls failed. We raise to provoke
6041 // abnormal termination and ensure that the newly-created Fcb gets
6042 // deleted.
6043 //
6044
6045 if (Iosb.Status != STATUS_SUCCESS) {
6046
6047 FatRaiseStatus( IrpContext, Iosb.Status );
6048 }
6049#endif
6050
6051 //
6052 // If this is a temporary file, note it in the FcbState
6053 //
6054
6055 if (TemporaryFile) {
6056
6057 SetFlag( Fcb->FcbState, FCB_STATE_TEMPORARY );
6058 }
6059
6060
6061 //
6062 // Add some initial file allocation
6063 //
6064
6065
6066 FatAddFileAllocation( IrpContext, Fcb, FileObject, AllocationSize );
6067
6068
6069 UnwindAllocation = TRUE;
6070
6071 Fcb->FcbState |= FCB_STATE_TRUNCATE_ON_CLOSE;
6072
6073 //
6074 // Tentatively add the new Ea's
6075 //
6076
6077 if ( EaLength > 0 ) {
6078
6079 FatCreateEa( IrpContext,
6080 Fcb->Vcb,
6081 (PUCHAR) EaBuffer,
6082 EaLength,
6083 &Fcb->ShortName.Name.Oem,
6084 &EaHandle );
6085 }
6086
6087 if (!FatIsFat32(Fcb->Vcb)) {
6088
6089 ShortDirent->ExtendedAttributes = EaHandle;
6090 }
6091
6092
6093
6094 //
6095 // Initialize the LongFileName right now so that FatNotify
6096 // below won't have to.
6097 //
6098
6099 if (Fcb->FullFileName.Buffer == NULL) {
6100 FatSetFullNameInFcb( IrpContext, Fcb, RealUnicodeName );
6101 }
6102
6103 //
6104 // Setup the context and section object pointers, and update
6105 // our reference counts
6106 //
6107
6108 FatSetFileObject( FileObject,
6109 UserFileOpen,
6110 Fcb,
6111 UnwindCcb = FatCreateCcb( IrpContext ));
6112
6113 FileObject->SectionObjectPointer = &Fcb->NonPaged->SectionObjectPointers;
6114
6115 //
6116 // We call the notify package to report that the
6117 // we added a file.
6118 //
6119
6120 FatNotifyReportChange( IrpContext,
6121 Vcb,
6122 Fcb,
6123 FILE_NOTIFY_CHANGE_FILE_NAME,
6124 FILE_ACTION_ADDED );
6125
6126 //
6127 // Setup our share access
6128 //
6129
6130 IoSetShareAccess( *DesiredAccess,
6131 ShareAccess,
6132 FileObject,
6133 &Fcb->ShareAccess );
6134
6135 Fcb->UncleanCount += 1;
6136 Fcb->OpenCount += 1;
6137 if (FlagOn(FileObject->Flags, FO_NO_INTERMEDIATE_BUFFERING)) {
6138 Fcb->NonCachedUncleanCount += 1;
6139 }
6140 Vcb->OpenFileCount += 1;
6141 if (IsFileObjectReadOnly(FileObject)) { Vcb->ReadOnlyCount += 1; }
6142 CountsIncremented = TRUE;
6143
6144
6145 //
6146 // And set our return status
6147 //
6148
6149 Iosb.Status = STATUS_SUCCESS;
6150 Iosb.Information = FILE_CREATED;
6151
6152 if ( NT_SUCCESS(Iosb.Status) ) {
6153
6154 //
6155 // Mark the DeleteOnClose bit if the operation was successful.
6156 //
6157
6158 if ( DeleteOnClose ) {
6159
6160 SetFlag( UnwindCcb->Flags, CCB_FLAG_DELETE_ON_CLOSE );
6161 }
6162
6163 //
6164 // Mark the OpenedByShortName bit if the operation was successful.
6165 // If we created an Lfn, we have some sort of generated short name
6166 // and thus don't consider ourselves to have opened it - though we
6167 // may have had a case mix Lfn "Foo.bar" and generated "FOO.BAR"
6168 //
6169 // Unless, of course, we wanted to create a short name and hit an
6170 // associated Lfn in the tunnel cache
6171 //
6172
6173 if ( !CreateLfn && !UsingTunneledLfn ) {
6174
6175 SetFlag( UnwindCcb->Flags, CCB_FLAG_OPENED_BY_SHORTNAME );
6176 }
6177
6178 //
6179 // Mark the ManageVolumeAccess bit if the privilege is held.
6180 //
6181
6182 if (FatCheckManageVolumeAccess( IrpContext,
6183 IrpSp->Parameters.Create.SecurityContext->AccessState,
6184 (KPROCESSOR_MODE)( FlagOn( IrpSp->Flags, SL_FORCE_ACCESS_CHECK ) ?
6185 UserMode :
6186 IrpContext->OriginatingIrp->RequestorMode ))) {
6187
6188 SetFlag( UnwindCcb->Flags, CCB_FLAG_MANAGE_VOLUME_ACCESS );
6189 }
6190
6191 }
6192
6193
6194 } _SEH2_FINALLY {
6195
6196 DebugUnwind( FatCreateNewFile );
6197
6198 if (UniTunneledLongName.Buffer != UniTunneledLongNameBuffer) {
6199
6200 //
6201 // Tunneling package grew the buffer from pool
6202 //
6203
6204 ExFreePool( UniTunneledLongName.Buffer );
6205 }
6206
6207
6208 //
6209 // If this is an abnormal termination then undo our work.
6210 //
6211 // The extra exception handling here is complex. We've got
6212 // two places here where an exception can be thrown again.
6213 //
6214
6215 LocalAbnormalTermination = _SEH2_AbnormalTermination();
6216
6217 if (LocalAbnormalTermination) {
6218
6219 if (CountsIncremented) {
6220 Fcb->UncleanCount -= 1;
6221 Fcb->OpenCount -= 1;
6222 if (FlagOn(FileObject->Flags, FO_NO_INTERMEDIATE_BUFFERING)) {
6223 Fcb->NonCachedUncleanCount -= 1;
6224 }
6225 Vcb->OpenFileCount -= 1;
6226 if (IsFileObjectReadOnly(FileObject)) { Vcb->ReadOnlyCount -= 1; }
6227 }
6228
6229 if (UnwindFcb == NULL) {
6230
6231 NT_ASSERT( (ParentDcb->Specific.Dcb.UnusedDirentVbo == 0xffffffff) ||
6232 RtlAreBitsSet( &ParentDcb->Specific.Dcb.FreeDirentBitmap,
6233 DirentByteOffset / sizeof(DIRENT),
6234 DirentsNeeded ) );
6235
6236 RtlClearBits( &ParentDcb->Specific.Dcb.FreeDirentBitmap,
6237 DirentByteOffset / sizeof(DIRENT),
6238 DirentsNeeded );
6239 }
6240
6241 //
6242 // Mark the dirents deleted. The code is complex because of
6243 // dealing with an LFN that crosses a page boundary.
6244 //
6245
6246 if (UnwindDirent != NULL) {
6247
6248 ULONG i;
6249
6250 for (i = 0; i < DirentsNeeded; i++) {
6251
6252 if (DirentFromPool == FALSE) {
6253
6254 //
6255 // Simple case.
6256 //
6257
6258 Dirent[i].FileName[0] = FAT_DIRENT_DELETED;
6259
6260 } else {
6261
6262 //
6263 // If the second CcPreparePinWrite failed, we have
6264 // to stop early.
6265 //
6266
6267 if ((SecondPageBcb == NULL) &&
6268 (i == DirentsInFirstPage)) {
6269
6270 break;
6271 }
6272
6273 //
6274 // Now conditionally update either page.
6275 //
6276
6277 if (i < DirentsInFirstPage) {
6278
6279 FirstPageDirent[i].FileName[0] = FAT_DIRENT_DELETED;
6280
6281 } else {
6282
6283 SecondPageDirent[i - DirentsInFirstPage].FileName[0] = FAT_DIRENT_DELETED;
6284 }
6285 }
6286 }
6287 }
6288 }
6289
6290 //
6291 // We must handle exceptions in the following fragments and plow on with the
6292 // unwind of this create operation. This is basically inverted from the
6293 // previous state of the code. Since AbnormalTermination() changes when we
6294 // enter a new enclosure, we cached the original state ...
6295 //
6296
6297 _SEH2_TRY {
6298
6299 if (LocalAbnormalTermination) {
6300 if (UnwindAllocation) {
6301 FatTruncateFileAllocation( IrpContext, Fcb, 0 );
6302 }
6303 }
6304
6305 } _SEH2_FINALLY {
6306
6307 _SEH2_TRY {
6308
6309 if (LocalAbnormalTermination) {
6310 if (UnwindFcb != NULL) {
6311 FatDeleteDirent( IrpContext, UnwindFcb, NULL, TRUE );
6312 }
6313 }
6314
6315 } _SEH2_FINALLY {
6316
6317 if (LocalAbnormalTermination) {
6318 if (UnwindFcb != NULL) {
6319 if (ARGUMENT_PRESENT( FileObject )) {
6320 FileObject->SectionObjectPointer = NULL;
6321 }
6322 FatDeleteFcb( IrpContext, &UnwindFcb );
6323 }
6324 if (UnwindCcb != NULL) { FatDeleteCcb( IrpContext, &UnwindCcb ); }
6325 }
6326
6327 //
6328 // This is the normal cleanup code.
6329 //
6330
6331 FatUnpinBcb( IrpContext, DirentBcb );
6332 FatUnpinBcb( IrpContext, SecondPageBcb );
6333
6334 if (DirentFromPool) {
6335
6336 ExFreePool( Dirent );
6337 }
6338
6339 } _SEH2_END;
6340 } _SEH2_END;
6341
6342 DebugTrace(-1, Dbg, "FatCreateNewFile -> Iosb.Status = %08lx\n", Iosb.Status);
6343 } _SEH2_END;
6344
6345 return Iosb;
6346}
6347
6348
6349//
6350// Internal support routine
6351//
6352
6353_Requires_lock_held_(_Global_critical_region_)
6354IO_STATUS_BLOCK
6355FatSupersedeOrOverwriteFile (
6356 _In_ PIRP_CONTEXT IrpContext,
6357 _Inout_ PFILE_OBJECT FileObject,
6358 _Inout_ PFCB Fcb,
6359 _In_ ULONG AllocationSize,
6360 _In_ PFILE_FULL_EA_INFORMATION EaBuffer,
6361 _In_ ULONG EaLength,
6362 _In_ USHORT FileAttributes,
6363 _In_ ULONG CreateDisposition,
6364 _In_ BOOLEAN NoEaKnowledge
6365 )
6366
6367/*++
6368
6369Routine Description:
6370
6371 This routine performs a file supersede or overwrite operation.
6372
6373Arguments:
6374
6375 FileObject - Supplies a pointer to the file object
6376
6377 Fcb - Supplies a pointer to the Fcb
6378
6379 AllocationSize - Supplies an initial allocation size
6380
6381 EaBuffer - Supplies the Ea set for the superseded/overwritten file
6382
6383 EaLength - Supplies the length, in bytes, of EaBuffer
6384
6385 FileAttributes - Supplies the supersede/overwrite file attributes
6386
6387 CreateDisposition - Supplies the create disposition for the file
6388 It must be either supersede, overwrite, or overwrite if.
6389
6390 NoEaKnowledge - This opener doesn't understand Ea's and we fail this
6391 open if the file has NeedEa's.
6392
6393Return Value:
6394
6395 IO_STATUS_BLOCK - Returns the completion status for the operation
6396
6397--*/
6398
6399{
6400 IO_STATUS_BLOCK Iosb = {0};
6401
6402 PDIRENT Dirent;
6403 PBCB DirentBcb;
6404
6405 USHORT EaHandle = 0;
6406 BOOLEAN EaChange = FALSE;
6407 BOOLEAN ReleasePaging = FALSE;
6408
6409 PCCB Ccb;
6410
6411 ULONG NotifyFilter;
6412 ULONG HeaderSize = 0;
6413 LARGE_INTEGER AllocSize = {0};
6414
6415 //
6416 // The following variables are for abnormal termination
6417 //
6418
6419 PCCB UnwindCcb = NULL;
6420 USHORT UnwindEa = 0;
6421
6422 PAGED_CODE();
6423
6424 DebugTrace(+1, Dbg, "FatSupersedeOrOverwriteFile...\n", 0);
6425
6426 DirentBcb = NULL;
6427
6428 //
6429 // We fail this operation if the caller doesn't understand Ea's.
6430 //
6431
6432 if (NoEaKnowledge
6433 && EaLength > 0) {
6434
6435 Iosb.Status = STATUS_ACCESS_DENIED;
6436
6437 DebugTrace(-1, Dbg, "FatSupersedeOrOverwriteFile -> Iosb.Status = %08lx\n", Iosb.Status);
6438 return Iosb;
6439 }
6440
6441 _SEH2_TRY {
6442
6443 //
6444 // Before we actually truncate, check to see if the purge
6445 // is going to fail.
6446 //
6447
6448 if (!MmCanFileBeTruncated( &Fcb->NonPaged->SectionObjectPointers,
6449 &FatLargeZero )) {
6450
6451 try_return( Iosb.Status = STATUS_USER_MAPPED_FILE );
6452 }
6453
6454 //
6455 // Setup the context and section object pointers, and update
6456 // our reference counts
6457 //
6458
6459 FatSetFileObject( FileObject,
6460 UserFileOpen,
6461 Fcb,
6462 Ccb = UnwindCcb = FatCreateCcb( IrpContext ));
6463
6464 FileObject->SectionObjectPointer = &Fcb->NonPaged->SectionObjectPointers;
6465
6466 //
6467 // Since this is an supersede/overwrite, purge the section so
6468 // that mappers will see zeros. We set the CREATE_IN_PROGRESS flag
6469 // to prevent the Fcb from going away out from underneath us.
6470 //
6471
6472 SetFlag(Fcb->Vcb->VcbState, VCB_STATE_FLAG_CREATE_IN_PROGRESS);
6473
6474 CcPurgeCacheSection( &Fcb->NonPaged->SectionObjectPointers, NULL, 0, FALSE );
6475
6476 //
6477 // Tentatively add the new Ea's
6478 //
6479
6480 if (EaLength > 0) {
6481
6482 FatCreateEa( IrpContext,
6483 Fcb->Vcb,
6484 (PUCHAR) EaBuffer,
6485 EaLength,
6486 &Fcb->ShortName.Name.Oem,
6487 &EaHandle );
6488
6489 UnwindEa = EaHandle;
6490 EaChange = TRUE;
6491 }
6492
6493#if (NTDDI_VERSION >= NTDDI_WIN8)
6494 //
6495 // Break parent directory oplock. Directory oplock breaks are always
6496 // advisory, so we will never block/get STATUS_PENDING here. On the
6497 // off chance this fails with INSUFFICIENT_RESOURCES we do it here
6498 // where we can still tolerate a failure.
6499 //
6500
6501 Iosb.Status = FsRtlCheckOplockEx( FatGetFcbOplock(Fcb->ParentDcb),
6502 IrpContext->OriginatingIrp,
6503 OPLOCK_FLAG_PARENT_OBJECT,
6504 NULL,
6505 NULL,
6506 NULL );
6507
6508 if (Iosb.Status != STATUS_SUCCESS) {
6509
6510 FatRaiseStatus( IrpContext, Iosb.Status );
6511 }
6512#endif
6513
6514 //
6515 // Now set the new allocation size, we do that by first
6516 // zeroing out the current file size. Then we truncate and
6517 // allocate up to the new allocation size
6518 //
6519
6520 (VOID)ExAcquireResourceExclusiveLite( Fcb->Header.PagingIoResource, TRUE );
6521 ReleasePaging = TRUE;
6522
6523 Fcb->Header.FileSize.LowPart = 0;
6524 Fcb->Header.ValidDataLength.LowPart = 0;
6525 Fcb->ValidDataToDisk = 0;
6526
6527
6528 //
6529 // Validate that the allocation size will work.
6530 //
6531
6532 AllocSize.QuadPart = AllocationSize;
6533 if (!FatIsIoRangeValid( Fcb->Vcb, AllocSize, 0 )) {
6534
6535 DebugTrace(-1, Dbg, "Illegal allocation size\n", 0);
6536
6537 FatRaiseStatus( IrpContext, STATUS_DISK_FULL );
6538 }
6539
6540
6541 //
6542 // Tell the cache manager the size went to zero
6543 // This call is unconditional, because MM always wants to know.
6544 //
6545
6546 CcSetFileSizes( FileObject,
6547 (PCC_FILE_SIZES)&Fcb->Header.AllocationSize );
6548
6549 FatTruncateFileAllocation( IrpContext, Fcb, AllocationSize+HeaderSize );
6550
6551 ExReleaseResourceLite( Fcb->Header.PagingIoResource );
6552 ReleasePaging = FALSE;
6553
6554 FatAddFileAllocation( IrpContext, Fcb, FileObject, AllocationSize+HeaderSize );
6555
6556 Fcb->FcbState |= FCB_STATE_TRUNCATE_ON_CLOSE;
6557
6558 //
6559 // Modify the attributes and time of the file, by first reading
6560 // in the dirent for the file and then updating its attributes
6561 // and time fields. Note that for supersede we replace the file
6562 // attributes as opposed to adding to them.
6563 //
6564
6565 FatGetDirentFromFcbOrDcb( IrpContext,
6566 Fcb,
6567 FALSE,
6568 &Dirent,
6569 &DirentBcb );
6570 //
6571 // We should get the dirent since this Fcb is in good condition, verified as
6572 // we crawled down the prefix tree.
6573 //
6574 // Update the appropriate dirent fields, and the fcb fields
6575 //
6576
6577 Dirent->FileSize = 0;
6578
6579
6580 FileAttributes |= FILE_ATTRIBUTE_ARCHIVE;
6581
6582 if (CreateDisposition == FILE_SUPERSEDE) {
6583
6584 Dirent->Attributes = (UCHAR)FileAttributes;
6585
6586 } else {
6587
6588 Dirent->Attributes |= (UCHAR)FileAttributes;
6589 }
6590
6591 Fcb->DirentFatFlags = Dirent->Attributes;
6592
6593 KeQuerySystemTime( &Fcb->LastWriteTime );
6594
6595 (VOID)FatNtTimeToFatTime( IrpContext,
6596 &Fcb->LastWriteTime,
6597 TRUE,
6598 &Dirent->LastWriteTime,
6599 NULL );
6600
6601 if (FatData.ChicagoMode) {
6602
6603 Dirent->LastAccessDate = Dirent->LastWriteTime.Date;
6604 }
6605
6606 NotifyFilter = FILE_NOTIFY_CHANGE_LAST_WRITE
6607 | FILE_NOTIFY_CHANGE_ATTRIBUTES
6608 | FILE_NOTIFY_CHANGE_SIZE;
6609
6610 //
6611 // And now delete the previous Ea set if there was one.
6612 //
6613
6614 if (!FatIsFat32(Fcb->Vcb) && Dirent->ExtendedAttributes != 0) {
6615
6616 //
6617 // **** SDK fix, we won't fail this if there is
6618 // an error in the Ea's, we'll just leave
6619 // the orphaned Ea's in the file.
6620 //
6621
6622 EaChange = TRUE;
6623
6624 _SEH2_TRY {
6625
6626 FatDeleteEa( IrpContext,
6627 Fcb->Vcb,
6628 Dirent->ExtendedAttributes,
6629 &Fcb->ShortName.Name.Oem );
6630
6631 } _SEH2_EXCEPT( EXCEPTION_EXECUTE_HANDLER ) {
6632
6633 FatResetExceptionState( IrpContext );
6634 } _SEH2_END;
6635 }
6636
6637 //
6638 // Update the extended attributes handle in the dirent.
6639 //
6640
6641 if (EaChange) {
6642
6643 NT_ASSERT(!FatIsFat32(Fcb->Vcb));
6644
6645 Dirent->ExtendedAttributes = EaHandle;
6646
6647 NotifyFilter |= FILE_NOTIFY_CHANGE_EA;
6648 }
6649
6650 //
6651 // Now update the dirent to the new ea handle and set the bcb dirty
6652 // Once we do this we can no longer back out the Ea
6653 //
6654
6655 FatSetDirtyBcb( IrpContext, DirentBcb, Fcb->Vcb, TRUE );
6656 UnwindEa = 0;
6657
6658 //
6659 // Indicate that the Eas for this file have changed.
6660 //
6661
6662 Ccb->EaModificationCount += Fcb->EaModificationCount;
6663
6664 //
6665 // Check to see if we need to notify outstanding Irps for full
6666 // changes only (i.e., we haven't added, deleted, or renamed the file).
6667 //
6668
6669 FatNotifyReportChange( IrpContext,
6670 Fcb->Vcb,
6671 Fcb,
6672 NotifyFilter,
6673 FILE_ACTION_MODIFIED );
6674
6675 //
6676 // And set our status to success
6677 //
6678
6679 Iosb.Status = STATUS_SUCCESS;
6680
6681 if (CreateDisposition == FILE_SUPERSEDE) {
6682
6683 Iosb.Information = FILE_SUPERSEDED;
6684
6685 } else {
6686
6687 Iosb.Information = FILE_OVERWRITTEN;
6688 }
6689
6690 try_exit: NOTHING;
6691 } _SEH2_FINALLY {
6692
6693 DebugUnwind( FatSupersedeOfOverwriteFile );
6694
6695 if (ReleasePaging) { ExReleaseResourceLite( Fcb->Header.PagingIoResource ); }
6696
6697 //
6698 // If this is an abnormal termination then undo our work.
6699 //
6700
6701 if (_SEH2_AbnormalTermination()) {
6702
6703 if (UnwindEa != 0) { FatDeleteEa( IrpContext, Fcb->Vcb, UnwindEa, &Fcb->ShortName.Name.Oem ); }
6704 if (UnwindCcb != NULL) { FatDeleteCcb( IrpContext, &UnwindCcb ); }
6705 }
6706
6707 FatUnpinBcb( IrpContext, DirentBcb );
6708
6709 ClearFlag(Fcb->Vcb->VcbState, VCB_STATE_FLAG_CREATE_IN_PROGRESS);
6710
6711 DebugTrace(-1, Dbg, "FatSupersedeOrOverwriteFile -> Iosb.Status = %08lx\n", Iosb.Status);
6712 } _SEH2_END;
6713
6714 return Iosb;
6715}
6716
6717
6718VOID
6719FatSetFullNameInFcb (
6720 _In_ PIRP_CONTEXT IrpContext,
6721 _Inout_ PFCB Fcb,
6722 _In_ PUNICODE_STRING FinalName
6723 )
6724
6725/*++
6726
6727Routine Description:
6728
6729 This routine attempts a quick form of the full FatSetFullFileNameInFcb
6730 operation.
6731
6732 NOTE: this routine is probably not worth the code duplication involved,
6733 and is not equipped to handle the cases where the parent doesn't have
6734 the full name set up.
6735
6736Arguments:
6737
6738 Fcb - Supplies a pointer to the Fcb
6739
6740 FinalName - Supplies the last component of the path to this Fcb's dirent
6741
6742Return Value:
6743
6744 None. May silently fail.
6745
6746--*/
6747
6748{
6749 PAGED_CODE();
6750
6751 UNREFERENCED_PARAMETER( IrpContext );
6752
6753 NT_ASSERT( Fcb->FullFileName.Buffer == NULL );
6754
6755 //
6756 // Prefer the ExactCaseLongName of the file for this operation, if set. In
6757 // this way we avoid building the fullname with a short filename. Several
6758 // operations assume this - the FinalNameLength in particular is the Lfn
6759 // (if existant) length, and we use this to crack the fullname in paths
6760 // such as the FsRtlNotify caller.
6761 //
6762 // If the caller specified a particular name and it is short, it is the
6763 // case that the long name was set up.
6764 //
6765
6766 if (Fcb->ExactCaseLongName.Buffer) {
6767
6768 NT_ASSERT( Fcb->ExactCaseLongName.Length != 0 );
6769 FinalName = &Fcb->ExactCaseLongName;
6770 }
6771
6772 //
6773 // Special case the root.
6774 //
6775
6776 if (NodeType(Fcb->ParentDcb) == FAT_NTC_ROOT_DCB) {
6777
6778 Fcb->FullFileName.Length =
6779 Fcb->FullFileName.MaximumLength = sizeof(WCHAR) + FinalName->Length;
6780
6781 Fcb->FullFileName.Buffer = FsRtlAllocatePoolWithTag( PagedPool,
6782 Fcb->FullFileName.Length,
6783 TAG_FILENAME_BUFFER );
6784
6785 Fcb->FullFileName.Buffer[0] = L'\\';
6786
6787 RtlCopyMemory( &Fcb->FullFileName.Buffer[1],
6788 &FinalName->Buffer[0],
6789 FinalName->Length );
6790
6791 } else {
6792
6793 PUNICODE_STRING Prefix;
6794
6795 Prefix = &Fcb->ParentDcb->FullFileName;
6796
6797 //
6798 // It is possible our parent's full filename is not set. Simply fail
6799 // this attempt.
6800 //
6801
6802 if (Prefix->Buffer == NULL) {
6803
6804 return;
6805 }
6806
6807 Fcb->FullFileName.Length =
6808 Fcb->FullFileName.MaximumLength = Prefix->Length + sizeof(WCHAR) + FinalName->Length;
6809
6810 Fcb->FullFileName.Buffer = FsRtlAllocatePoolWithTag( PagedPool,
6811 Fcb->FullFileName.Length,
6812 TAG_FILENAME_BUFFER );
6813
6814 RtlCopyMemory( &Fcb->FullFileName.Buffer[0],
6815 &Prefix->Buffer[0],
6816 Prefix->Length );
6817
6818 Fcb->FullFileName.Buffer[Prefix->Length / sizeof(WCHAR)] = L'\\';
6819
6820 RtlCopyMemory( &Fcb->FullFileName.Buffer[(Prefix->Length / sizeof(WCHAR)) + 1],
6821 &FinalName->Buffer[0],
6822 FinalName->Length );
6823
6824 }
6825}
6826
6827
6828NTSTATUS
6829FatCheckSystemSecurityAccess (
6830 _In_ PIRP_CONTEXT IrpContext
6831 )
6832{
6833 PACCESS_STATE AccessState;
6834 PIO_STACK_LOCATION IrpSp = IoGetCurrentIrpStackLocation( IrpContext->OriginatingIrp );
6835
6836 PAGED_CODE();
6837
6838 //
6839 // We check if the caller wants ACCESS_SYSTEM_SECURITY access on this
6840 // object and fail the request if he does.
6841 //
6842
6843 NT_ASSERT( IrpSp->Parameters.Create.SecurityContext != NULL );
6844 AccessState = IrpSp->Parameters.Create.SecurityContext->AccessState;
6845
6846 //
6847 // Check if the remaining privilege includes ACCESS_SYSTEM_SECURITY.
6848 //
6849
6850 if (FlagOn( AccessState->RemainingDesiredAccess, ACCESS_SYSTEM_SECURITY )) {
6851
6852 if (!SeSinglePrivilegeCheck( FatSecurityPrivilege,
6853 UserMode )) {
6854
6855 return STATUS_ACCESS_DENIED;
6856 }
6857
6858 //
6859 // Move this privilege from the Remaining access to Granted access.
6860 //
6861
6862 ClearFlag( AccessState->RemainingDesiredAccess, ACCESS_SYSTEM_SECURITY );
6863 SetFlag( AccessState->PreviouslyGrantedAccess, ACCESS_SYSTEM_SECURITY );
6864 }
6865
6866 return STATUS_SUCCESS;
6867}
6868
6869
6870NTSTATUS
6871FatCheckShareAccess (
6872 _In_ PIRP_CONTEXT IrpContext,
6873 _In_ PFILE_OBJECT FileObject,
6874 _In_ PFCB FcbOrDcb,
6875 _In_ PACCESS_MASK DesiredAccess,
6876 _In_ ULONG ShareAccess
6877 )
6878
6879/*++
6880
6881Routine Description:
6882
6883 This routine checks conditions that may result in a sharing violation.
6884
6885Arguments:
6886
6887 FileObject - Pointer to the file object of the current open request.
6888
6889 FcbOrDcb - Supplies a pointer to the Fcb/Dcb.
6890
6891 DesiredAccess - Desired access of current open request.
6892
6893 ShareAccess - Shared access requested by current open request.
6894
6895Return Value:
6896
6897 If the accessor has access to the file, STATUS_SUCCESS is returned.
6898 Otherwise, STATUS_SHARING_VIOLATION is returned.
6899
6900--*/
6901
6902{
6903 PAGED_CODE();
6904
6905#if (NTDDI_VERSION >= NTDDI_VISTA)
6906 //
6907 // Do an extra test for writeable user sections if the user did not allow
6908 // write sharing - this is neccessary since a section may exist with no handles
6909 // open to the file its based against.
6910 //
6911
6912 if ((NodeType( FcbOrDcb ) == FAT_NTC_FCB) &&
6913 !FlagOn( ShareAccess, FILE_SHARE_WRITE ) &&
6914 FlagOn( *DesiredAccess, FILE_EXECUTE | FILE_READ_DATA | FILE_WRITE_DATA | FILE_APPEND_DATA | DELETE | MAXIMUM_ALLOWED ) &&
6915 MmDoesFileHaveUserWritableReferences( &FcbOrDcb->NonPaged->SectionObjectPointers )) {
6916
6917 return STATUS_SHARING_VIOLATION;
6918 }
6919#endif
6920
6921 //
6922 // Check if the Fcb has the proper share access.
6923 //
6924
6925 return IoCheckShareAccess( *DesiredAccess,
6926 ShareAccess,
6927 FileObject,
6928 &FcbOrDcb->ShareAccess,
6929 FALSE );
6930
6931 UNREFERENCED_PARAMETER( IrpContext );
6932}
6933
6934//
6935// Lifted from NTFS.
6936//
6937
6938NTSTATUS
6939FatCallSelfCompletionRoutine (
6940 __in PDEVICE_OBJECT DeviceObject,
6941 __in PIRP Irp,
6942 __in PVOID Contxt
6943 )
6944
6945{
6946 //
6947 // Set the event so that our call will wake up.
6948 //
6949
6950 KeSetEvent( (PKEVENT)Contxt, 0, FALSE );
6951
6952 UNREFERENCED_PARAMETER( DeviceObject );
6953 UNREFERENCED_PARAMETER( Irp );
6954
6955 //
6956 // If we change this return value then FatIoCallSelf needs to reference the
6957 // file object.
6958 //
6959
6960 return STATUS_MORE_PROCESSING_REQUIRED;
6961}
MmDoesFileHaveUserWritableReferences
ULONG NTAPI MmDoesFileHaveUserWritableReferences(IN PSECTION_OBJECT_POINTERS SectionPointer)
Definition: section.c:2987
IoGetCurrentIrpStackLocation
static PIO_STACK_LOCATION IoGetCurrentIrpStackLocation(PIRP Irp)
Definition: Bus_PDO_EvalMethod.c:150
PAGED_CODE
#define PAGED_CODE()
Definition: Bus_PDO_EvalMethod.c:87
NodeType
NodeType
Definition: Node.h:6
BOOLEAN
unsigned char BOOLEAN
Definition: ProcessorBind.h:185
FatCheckFileAccess
BOOLEAN FatCheckFileAccess(PIRP_CONTEXT IrpContext, IN UCHAR DirentAttributes, IN PACCESS_MASK DesiredAccess)
Definition: acchksup.c:39
FatExplicitDeviceAccessGranted
NTSTATUS FatExplicitDeviceAccessGranted(IN PIRP_CONTEXT IrpContext, IN PDEVICE_OBJECT DeviceObject, IN PACCESS_STATE AccessState, IN KPROCESSOR_MODE ProcessorMode)
Definition: acchksup.c:225
FatCheckManageVolumeAccess
BOOLEAN FatCheckManageVolumeAccess(_In_ PIRP_CONTEXT IrpContext, _In_ PACCESS_STATE AccessState, _In_ KPROCESSOR_MODE ProcessorMode)
Definition: acchksup.c:176
VOID
#define VOID
Definition: acefi.h:82
NTSTATUS
LONG NTSTATUS
Definition: precomp.h:26
FILE_DIRECTORY_FILE
#define FILE_DIRECTORY_FILE
Definition: constants.h:491
FILE_NON_DIRECTORY_FILE
#define FILE_NON_DIRECTORY_FILE
Definition: constants.h:492
FILE_COMPLETE_IF_OPLOCKED
#define FILE_COMPLETE_IF_OPLOCKED
Definition: constants.h:493
FILE_DELETE_ON_CLOSE
#define FILE_DELETE_ON_CLOSE
Definition: constants.h:494
FatOpenVolume
BOOLEAN FatOpenVolume(PFAT_VOLUME_INFO Volume, PFAT_BOOTSECTOR BootSector, ULONGLONG PartitionSectorCount)
Definition: fat.c:138
except
#define except(x)
Definition: btrfs_drv.h:136
CcFlushCache
VOID NTAPI CcFlushCache(IN PSECTION_OBJECT_POINTERS SectionObjectPointer, IN OPTIONAL PLARGE_INTEGER FileOffset, IN ULONG Length, OUT OPTIONAL PIO_STATUS_BLOCK IoStatus)
Definition: cachesub.c:222
TypeOfOpen
_Inout_ PFILE_OBJECT _In_ TYPE_OF_OPEN TypeOfOpen
Definition: cdprocs.h:589
UserDirectoryOpen
@ UserDirectoryOpen
Definition: cdprocs.h:576
UserFileOpen
@ UserFileOpen
Definition: cdprocs.h:577
UserVolumeOpen
@ UserVolumeOpen
Definition: cdprocs.h:575
Fcb
_In_ PFCB Fcb
Definition: cdprocs.h:159
Ccb
_Inout_ PFILE_OBJECT _In_ TYPE_OF_OPEN PFCB _In_opt_ PCCB Ccb
Definition: cdprocs.h:592
TYPE_OF_OPEN
enum _TYPE_OF_OPEN TYPE_OF_OPEN
try_return
#define try_return(S)
Definition: cdprocs.h:2179
PCCB
CCB * PCCB
Definition: cdstruc.h:1101
PVOLUME_DEVICE_OBJECT
VOLUME_DEVICE_OBJECT * PVOLUME_DEVICE_OBJECT
Definition: cdstruc.h:769
FcbGood
@ FcbGood
Definition: cdstruc.h:779
_Requires_lock_held_
#define _Requires_lock_held_(lock)
Definition: concurrencysal.h:105
Irp
_In_ PIRP Irp
Definition: csq.h:116
STATUS_PENDING
#define STATUS_PENDING
Definition: d3dkmdt.h:43
STATUS_NO_MEMORY
#define STATUS_NO_MEMORY
Definition: d3dkmdt.h:51
STATUS_NOT_IMPLEMENTED
#define STATUS_NOT_IMPLEMENTED
Definition: d3dkmdt.h:42
RtlAreBitsSet
#define RtlAreBitsSet
Definition: dbgbitmap.h:328
RtlClearBits
#define RtlClearBits
Definition: dbgbitmap.h:331
__in
#define __in
Definition: dbghelp.h:35
NULL
#define NULL
Definition: types.h:112
TRUE
#define TRUE
Definition: types.h:120
FALSE
#define FALSE
Definition: types.h:117
NT_SUCCESS
#define NT_SUCCESS(StatCode)
Definition: apphelp.c:33
FILE_SHARE_READ
#define FILE_SHARE_READ
Definition: compat.h:136
KeRemoveQueueDpc
BOOLEAN NTAPI KeRemoveQueueDpc(IN PKDPC Dpc)
Definition: dpc.c:878
L
#define L(x)
Definition: resources.c:13
NodeType
#define NodeType(P)
Definition: nodetype.h:51
DirentByteOffset
_In_ PIO_STACK_LOCATION _Inout_ PFILE_OBJECT _Inout_ PVCB _Outptr_result_maybenull_ PDCB _In_ PDCB _In_ PDIRENT _In_ ULONG _In_ ULONG DirentByteOffset
Definition: create.c:4145
FatSecurityPrivilege
LUID FatSecurityPrivilege
Definition: create.c:50
Lfn
_In_ PIO_STACK_LOCATION _Inout_ PFILE_OBJECT _Inout_ PVCB _Outptr_result_maybenull_ PDCB _In_ PDCB _In_ PDIRENT _In_ ULONG _In_ ULONG _In_ PUNICODE_STRING Lfn
Definition: create.c:4146
Dirent
_In_ PIO_STACK_LOCATION _Inout_ PFILE_OBJECT _Inout_ PVCB _Outptr_result_maybenull_ PDCB _In_ PDCB _In_ PDIRENT Dirent
Definition: create.c:4143
OpenRequiringOplock
_In_ PIO_STACK_LOCATION _Inout_ PFILE_OBJECT _Inout_ PVCB _Outptr_result_maybenull_ PDCB _In_ PDCB _In_ PDIRENT _In_ ULONG _In_ ULONG _In_ PUNICODE_STRING _In_ PACCESS_MASK _In_ USHORT _In_ ULONG _In_ BOOLEAN _In_ BOOLEAN _In_ BOOLEAN _In_ BOOLEAN OpenRequiringOplock
Definition: create.c:4205
IrpSp
_In_ PIO_STACK_LOCATION IrpSp
Definition: create.c:4138
FatCheckSystemSecurityAccess
NTSTATUS FatCheckSystemSecurityAccess(_In_ PIRP_CONTEXT IrpContext)
Definition: create.c:6829
UnwindCcb
PCCB UnwindCcb
Definition: create.c:4213
FatCallSelfCompletionRoutine
NTSTATUS FatCallSelfCompletionRoutine(__in PDEVICE_OBJECT DeviceObject, __in PIRP Irp, __in PVOID Contxt)
Definition: create.c:6939
FatSetFullNameInFcb
VOID FatSetFullNameInFcb(_In_ PIRP_CONTEXT IrpContext, _Inout_ PFCB Fcb, _In_ PUNICODE_STRING FinalName)
Definition: create.c:6719
FatSetFileObject
FatSetFileObject(FileObject, UserDirectoryOpen,(*Dcb), UnwindCcb=FatCreateCcb(IrpContext))
CollectCreateStatistics
#define CollectCreateStatistics(VCB, STATUS)
Definition: create.c:41
CollectCreateHitStatistics
#define CollectCreateHitStatistics(VCB)
Definition: create.c:36
Dbg
#define Dbg
Definition: create.c:29
ParentDcb
_In_ PIO_STACK_LOCATION _Inout_ PFILE_OBJECT _Inout_ PVCB _Outptr_result_maybenull_ PDCB _In_ PDCB ParentDcb
Definition: create.c:4142
UnwindDcb
PDCB UnwindDcb
Definition: create.c:4212
FatCheckShareAccess
NTSTATUS FatCheckShareAccess(_In_ PIRP_CONTEXT IrpContext, _In_ PFILE_OBJECT FileObject, _In_ PFCB FcbOrDcb, _In_ PACCESS_MASK DesiredAccess, _In_ ULONG ShareAccess)
Definition: create.c:6871
DeleteOnClose
_In_ PIO_STACK_LOCATION _Inout_ PFILE_OBJECT _Inout_ PVCB _Outptr_result_maybenull_ PDCB _In_ PDCB _In_ PDIRENT _In_ ULONG _In_ ULONG _In_ PUNICODE_STRING _In_ PACCESS_MASK _In_ USHORT _In_ ULONG _In_ BOOLEAN _In_ BOOLEAN DeleteOnClose
Definition: create.c:4151
LfnByteOffset
_In_ PIO_STACK_LOCATION _Inout_ PFILE_OBJECT _Inout_ PVCB _Outptr_result_maybenull_ PDCB _In_ PDCB _In_ PDIRENT _In_ ULONG LfnByteOffset
Definition: create.c:4144
CountsIncremented
BOOLEAN CountsIncremented
Definition: create.c:4215
NoEaKnowledge
_In_ PIO_STACK_LOCATION _Inout_ PFILE_OBJECT _Inout_ PVCB _Outptr_result_maybenull_ PDCB _In_ PDCB _In_ PDIRENT _In_ ULONG _In_ ULONG _In_ PUNICODE_STRING _In_ PACCESS_MASK _In_ USHORT _In_ ULONG _In_ BOOLEAN NoEaKnowledge
Definition: create.c:4150
FileNameOpenedDos
_In_ PIO_STACK_LOCATION _Inout_ PFILE_OBJECT _Inout_ PVCB _Outptr_result_maybenull_ PDCB _In_ PDCB _In_ PDIRENT _In_ ULONG _In_ ULONG _In_ PUNICODE_STRING _In_ PACCESS_MASK _In_ USHORT _In_ ULONG _In_ BOOLEAN _In_ BOOLEAN _In_ BOOLEAN FileNameOpenedDos
Definition: create.c:4152
ShareAccess
_In_ PIO_STACK_LOCATION _Inout_ PFILE_OBJECT _Inout_ PVCB _Outptr_result_maybenull_ PDCB _In_ PDCB _In_ PDIRENT _In_ ULONG _In_ ULONG _In_ PUNICODE_STRING _In_ PACCESS_MASK _In_ USHORT ShareAccess
Definition: create.c:4148
Iosb
return Iosb
Definition: create.c:4403
Dcb
_In_ PIO_STACK_LOCATION _Inout_ PFILE_OBJECT _Inout_ PVCB _Outptr_result_maybenull_ PDCB * Dcb
Definition: create.c:4141
FAT_DIRENT_ATTR_READ_ONLY
#define FAT_DIRENT_ATTR_READ_ONLY
Definition: fat.h:368
PVBO
VBO * PVBO
Definition: fat.h:39
FAT_DIRENT_DELETED
#define FAT_DIRENT_DELETED
Definition: fat.h:337
FAT_DIRENT_ATTR_SYSTEM
#define FAT_DIRENT_ATTR_SYSTEM
Definition: fat.h:370
FAT_DIRENT_ATTR_DIRECTORY
#define FAT_DIRENT_ATTR_DIRECTORY
Definition: fat.h:372
FAT_DIRENT_ATTR_HIDDEN
#define FAT_DIRENT_ATTR_HIDDEN
Definition: fat.h:369
LFN_DIRENT
PACKED_LFN_DIRENT LFN_DIRENT
Definition: lfn.h:43
FAT_LFN_DIRENTS_NEEDED
#define FAT_LFN_DIRENTS_NEEDED(NAME)
Definition: lfn.h:53
FAT_NTC_ROOT_DCB
#define FAT_NTC_ROOT_DCB
Definition: nodetype.h:31
FAT_NTC_FCB
#define FAT_NTC_FCB
Definition: nodetype.h:29
FAT_NTC_DCB
#define FAT_NTC_DCB
Definition: nodetype.h:30
FatBugCheck
#define FatBugCheck(A, B, C)
Definition: nodetype.h:104
TAG_DIRENT
#define TAG_DIRENT
Definition: nodetype.h:158
TAG_FILENAME_BUFFER
#define TAG_FILENAME_BUFFER
Definition: nodetype.h:167
IsListEmpty
#define IsListEmpty(ListHead)
Definition: env_spec_w32.h:954
DO_VERIFY_VOLUME
#define DO_VERIFY_VOLUME
Definition: env_spec_w32.h:393
RtlUpcaseUnicodeString
NTSTATUS RtlUpcaseUnicodeString(PUNICODE_STRING dst, PUNICODE_STRING src, BOOLEAN Alloc)
Definition: string_lib.cpp:46
PAGE_SIZE
#define PAGE_SIZE
Definition: env_spec_w32.h:49
KeSetEvent
#define KeSetEvent(pEvt, foo, foo2)
Definition: env_spec_w32.h:476
KeQuerySystemTime
#define KeQuerySystemTime(t)
Definition: env_spec_w32.h:570
ExFreePool
#define ExFreePool(addr)
Definition: env_spec_w32.h:352
ExAcquireResourceExclusiveLite
#define ExAcquireResourceExclusiveLite(res, wait)
Definition: env_spec_w32.h:615
PagedPool
#define PagedPool
Definition: env_spec_w32.h:308
ClearFlag
#define ClearFlag(_F, _SF)
Definition: ext2fs.h:191
SetFlag
#define SetFlag(_F, _SF)
Definition: ext2fs.h:187
FlagOn
#define FlagOn(_F, _SF)
Definition: ext2fs.h:179
BooleanFlagOn
#define BooleanFlagOn(F, SF)
Definition: ext2fs.h:183
FatUnpinRepinnedBcbs
VOID FatUnpinRepinnedBcbs(IN PIRP_CONTEXT IrpContext)
Definition: cachesup.c:1407
FatSyncUninitializeCacheMap
VOID FatSyncUninitializeCacheMap(IN PIRP_CONTEXT IrpContext, IN PFILE_OBJECT FileObject)
Definition: cachesup.c:1812
FatToggleMediaEjectDisable
NTSTATUS FatToggleMediaEjectDisable(IN PIRP_CONTEXT IrpContext, IN PVCB Vcb, IN BOOLEAN PreventRemoval)
Definition: deviosup.c:3495
FatConstructDirent
VOID FatConstructDirent(IN PIRP_CONTEXT IrpContext, IN OUT PDIRENT Dirent, IN POEM_STRING FileName, IN BOOLEAN ComponentReallyLowercase, IN BOOLEAN ExtensionReallyLowercase, IN PUNICODE_STRING Lfn OPTIONAL, IN USHORT Attributes, IN BOOLEAN ZeroAndSetTimeFields, IN PLARGE_INTEGER SetCreationTime OPTIONAL)
Definition: dirsup.c:2171
FatExceptionFilter
ULONG FatExceptionFilter(IN PIRP_CONTEXT IrpContext, IN PEXCEPTION_POINTERS ExceptionPointer)
Definition: fatdata.c:204
FatIsIrpTopLevel
BOOLEAN FatIsIrpTopLevel(IN PIRP Irp)
Definition: fatdata.c:817
FatLargeZero
LARGE_INTEGER FatLargeZero
Definition: fatdata.c:62
FatData
FAT_DATA FatData
Definition: fatdata.c:56
FatReserveMdl
PMDL FatReserveMdl
Definition: fatdata.c:119
TimerStart
#define TimerStart(LEVEL)
Definition: fatdata.h:318
FAT_RESERVE_MDL_SIZE
#define FAT_RESERVE_MDL_SIZE
Definition: fatdata.h:70
TimerStop
#define TimerStop(LEVEL, s)
Definition: fatdata.h:319
DebugTrace
#define DebugTrace(INDENT, LEVEL, X, Y)
Definition: fatdata.h:313
DebugUnwind
#define DebugUnwind(X)
Definition: fatdata.h:315
DIRENT
#define DIRENT
Definition: fatfs.h:187
VolumeClean
@ VolumeClean
Definition: fatprocs.h:1955
FatDeleteFcb
VOID FatDeleteFcb(IN PIRP_CONTEXT IrpContext, IN PFCB *Fcb)
Definition: strucsup.c:1952
FatDeleteCcb
VOID FatDeleteCcb(IN PIRP_CONTEXT IrpContext, IN PCCB *Ccb)
Definition: strucsup.c:2254
FatUnpinBcb
#define FatUnpinBcb(IRPCONTEXT, BCB)
Definition: fatprocs.h:547
FatIsNameLongUnicodeValid
static INLINE BOOLEAN FatIsNameLongUnicodeValid(PIRP_CONTEXT IrpContext, PUNICODE_STRING Name, BOOLEAN CanContainWildcards, BOOLEAN PathNameOk, BOOLEAN LeadingBackslashOk)
Definition: fatprocs.h:1216
FatStringTo8dot3
VOID FatStringTo8dot3(_In_ PIRP_CONTEXT IrpContext, _In_ OEM_STRING InputString, _Out_writes_bytes_(11) PFAT8DOT3 Output8dot3)
Definition: namesup.c:79
CreateLfn
IN PDCB IN POEM_STRING IN PUNICODE_STRING IN OUT POEM_STRING IN PUNICODE_STRING SuggestedShortName IN OUT BOOLEAN IN OUT BOOLEAN IN OUT BOOLEAN * CreateLfn
Definition: fatprocs.h:1312
IsFileObjectReadOnly
#define IsFileObjectReadOnly(FO)
Definition: fatprocs.h:2867
FAT_CREATE_INITIAL_NAME_BUF_SIZE
#define FAT_CREATE_INITIAL_NAME_BUF_SIZE
Definition: fatprocs.h:112
FatFsdPostRequest
NTSTATUS FatFsdPostRequest(IN PIRP_CONTEXT IrpContext, IN PIRP Irp)
Definition: workque.c:229
FatDecodeFileObject
TYPE_OF_OPEN FatDecodeFileObject(_In_ PFILE_OBJECT FileObject, _Outptr_ PVCB *Vcb, _Outptr_ PFCB *FcbOrDcb, _Outptr_ PCCB *Ccb)
Definition: filobsup.c:176
AllLowerComponent
IN PDCB IN POEM_STRING IN PUNICODE_STRING IN OUT POEM_STRING IN PUNICODE_STRING SuggestedShortName IN OUT BOOLEAN * AllLowerComponent
Definition: fatprocs.h:1309
TopLevel
IN PFCB IN PCCB IN TYPE_OF_OPEN IN BOOLEAN IN BOOLEAN TopLevel
Definition: fatprocs.h:2418
FatCompleteRequest
#define FatCompleteRequest(IRPCONTEXT, IRP, STATUS)
Definition: fatprocs.h:2634
FatNotifyReportChange
#define FatNotifyReportChange(I, V, F, FL, A)
Definition: fatprocs.h:2169
DirectoryFile
@ DirectoryFile
Definition: fatprocs.h:1047
FatReleaseFcb
#define FatReleaseFcb(IRPCONTEXT, Fcb)
Definition: fatprocs.h:1645
FatFlushFat
NTSTATUS FatFlushFat(IN PIRP_CONTEXT IrpContext, IN PVCB Vcb)
Definition: flush.c:801
FatCreateFcb
PFCB FatCreateFcb(IN PIRP_CONTEXT IrpContext, IN PVCB Vcb, IN PDCB ParentDcb, IN ULONG LfnOffsetWithinDirectory, IN ULONG DirentOffsetWithinDirectory, IN PDIRENT Dirent, IN PUNICODE_STRING Lfn OPTIONAL, IN PUNICODE_STRING OrigLfn OPTIONAL, IN BOOLEAN IsPagingFile, IN BOOLEAN SingleResource)
Definition: strucsup.c:1252
FatPrePostIrp
VOID NTAPI FatPrePostIrp(IN PVOID Context, IN PIRP Irp)
Definition: workque.c:91
FatFindFcb
PFCB FatFindFcb(IN PIRP_CONTEXT IrpContext, IN OUT PRTL_SPLAY_LINKS *RootNode, IN PSTRING Name, OUT PBOOLEAN FileNameDos OPTIONAL)
Definition: splaysup.c:306
FatDeviceIsFatFsdo
#define FatDeviceIsFatFsdo(D)
Definition: fatprocs.h:3096
FatResetExceptionState
#define FatResetExceptionState(IRPCONTEXT)
Definition: fatprocs.h:2984
FatAcquireExclusiveVcb
#define FatAcquireExclusiveVcb(IC, V)
Definition: fatprocs.h:1461
FatEnsureStringBufferEnough
VOID FatEnsureStringBufferEnough(_Inout_ PVOID String, _In_ USHORT DesiredBufferSize)
Definition: strucsup.c:3739
FcbOrDcb
IN PFCB FcbOrDcb
Definition: fatprocs.h:307
DirentsNeeded
IN PDCB IN ULONG DirentsNeeded
Definition: fatprocs.h:700
UnicodeName
IN PDCB IN POEM_STRING IN PUNICODE_STRING UnicodeName
Definition: fatprocs.h:1306
FatIsHandleCountZero
BOOLEAN FatIsHandleCountZero(IN PIRP_CONTEXT IrpContext, IN PVCB Vcb)
Definition: strucsup.c:3614
ShortName
IN PDCB IN POEM_STRING IN PUNICODE_STRING IN OUT POEM_STRING ShortName
Definition: fatprocs.h:1307
FatCreateCcb
PCCB FatCreateCcb(IN PIRP_CONTEXT IrpContext)
Definition: strucsup.c:2155
FatIsFastIoPossible
#define FatIsFastIoPossible(FCB)
Definition: fatprocs.h:2814
FatOplockComplete
VOID NTAPI FatOplockComplete(IN PVOID Context, IN PIRP Irp)
Definition: workque.c:35
AllLowerExtension
IN PDCB IN POEM_STRING IN PUNICODE_STRING IN OUT POEM_STRING IN PUNICODE_STRING SuggestedShortName IN OUT BOOLEAN IN OUT BOOLEAN * AllLowerExtension
Definition: fatprocs.h:1310
FatIsNameShortOemValid
#define FatIsNameShortOemValid(IRPCONTEXT, NAME, CAN_CONTAIN_WILD_CARDS, PATH_NAME_OK, LEADING_BACKSLASH_OK)
Definition: fatprocs.h:1199
EaHandle
IN PVCB IN PUCHAR IN ULONG IN POEM_STRING OUT PUSHORT EaHandle
Definition: fatprocs.h:899
FatVerifyVcb
VOID FatVerifyVcb(IN PIRP_CONTEXT IrpContext, IN PVCB Vcb)
Definition: verfysup.c:270
FatRaiseStatus
#define FatRaiseStatus(IRPCONTEXT, STATUS)
Definition: fatprocs.h:2978
EaLength
IN PVCB IN PDIRENT OUT PULONG EaLength
Definition: fatprocs.h:879
Flush
@ Flush
Definition: fatprocs.h:1055
FatGetFcbOplock
#define FatGetFcbOplock(F)
Definition: fatprocs.h:1657
FatCreateDcb
PDCB FatCreateDcb(IN PIRP_CONTEXT IrpContext, IN PVCB Vcb, IN PDCB ParentDcb, IN ULONG LfnOffsetWithinDirectory, IN ULONG DirentOffsetWithinDirectory, IN PDIRENT Dirent, IN PUNICODE_STRING Lfn OPTIONAL)
Definition: strucsup.c:1623
AllocationSize
IN PFCB IN PFILE_OBJECT FileObject IN ULONG AllocationSize
Definition: fatprocs.h:323
FatRemoveNames
VOID FatRemoveNames(IN PIRP_CONTEXT IrpContext, IN PFCB Fcb)
Definition: splaysup.c:222
FatIsFileOplockable
#define FatIsFileOplockable(F)
Definition: fatprocs.h:2852
FatFreeStringBuffer
VOID FatFreeStringBuffer(_Inout_ PVOID String)
Definition: strucsup.c:3784
FatReleaseVcb
#define FatReleaseVcb(IRPCONTEXT, Vcb)
Definition: fatprocs.h:1641
OemName
IN PDCB IN POEM_STRING OemName
Definition: fatprocs.h:1305
FatDirectoryKey
#define FatDirectoryKey(FcbOrDcb)
Definition: fatprocs.h:851
FatIsFat32
#define FatIsFat32(VCB)
Definition: fatprocs.h:1447
NeedEaCount
IN PVCB IN PDIRENT OUT PULONG NeedEaCount
Definition: fatprocs.h:888
FatCreateIrpContext
PIRP_CONTEXT FatCreateIrpContext(IN PIRP Irp, IN BOOLEAN Wait)
Definition: strucsup.c:2301
FatIsIoRangeValid
static INLINE BOOLEAN FatIsIoRangeValid(IN PVCB Vcb, IN LARGE_INTEGER Start, IN ULONG Length)
Definition: fatprocs.h:219
VCB_STATE_FLAG_VOLUME_DIRTY
#define VCB_STATE_FLAG_VOLUME_DIRTY
Definition: fatstruc.h:561
VCB_STATE_FLAG_LOCKED
#define VCB_STATE_FLAG_LOCKED
Definition: fatstruc.h:559
CCB_FLAG_MANAGE_VOLUME_ACCESS
#define CCB_FLAG_MANAGE_VOLUME_ACCESS
Definition: fatstruc.h:1338
IRP_CONTEXT_FLAG_SWAPPED_STACK
#define IRP_CONTEXT_FLAG_SWAPPED_STACK
Definition: fatstruc.h:1579
VCB_STATE_FLAG_REMOVABLE_MEDIA
#define VCB_STATE_FLAG_REMOVABLE_MEDIA
Definition: fatstruc.h:560
IRP_CONTEXT_FLAG_DISABLE_RAISE
#define IRP_CONTEXT_FLAG_DISABLE_RAISE
Definition: fatstruc.h:1573
VCB_STATE_FLAG_BOOT_OR_PAGING_FILE
#define VCB_STATE_FLAG_BOOT_OR_PAGING_FILE
Definition: fatstruc.h:567
CCB_FLAG_OPENED_BY_SHORTNAME
#define CCB_FLAG_OPENED_BY_SHORTNAME
Definition: fatstruc.h:1296
CCB_FLAG_SKIP_SHORT_NAME_COMPARE
#define CCB_FLAG_SKIP_SHORT_NAME_COMPARE
Definition: fatstruc.h:1253
VCB_STATE_FLAG_CREATE_IN_PROGRESS
#define VCB_STATE_FLAG_CREATE_IN_PROGRESS
Definition: fatstruc.h:566
VCB_STATE_FLAG_MOUNTED_DIRTY
#define VCB_STATE_FLAG_MOUNTED_DIRTY
Definition: fatstruc.h:562
FCB_STATE_TEMPORARY
#define FCB_STATE_TEMPORARY
Definition: fatstruc.h:1198
VCB_STATE_FLAG_WRITE_PROTECTED
#define VCB_STATE_FLAG_WRITE_PROTECTED
Definition: fatstruc.h:570
FCB_STATE_DELETE_ON_CLOSE
#define FCB_STATE_DELETE_ON_CLOSE
Definition: fatstruc.h:1193
FCB_STATE_SYSTEM_FILE
#define FCB_STATE_SYSTEM_FILE
Definition: fatstruc.h:1199
FCB_STATE_TRUNCATE_ON_CLOSE
#define FCB_STATE_TRUNCATE_ON_CLOSE
Definition: fatstruc.h:1194
FCB_STATE_PAGING_FILE
#define FCB_STATE_PAGING_FILE
Definition: fatstruc.h:1195
VcbGood
@ VcbGood
Definition: fatstruc.h:223
IRP_CONTEXT_FLAG_DISABLE_WRITE_THROUGH
#define IRP_CONTEXT_FLAG_DISABLE_WRITE_THROUGH
Definition: fatstruc.h:1565
CCB_FLAG_DELETE_ON_CLOSE
#define CCB_FLAG_DELETE_ON_CLOSE
Definition: fatstruc.h:1289
FCB_STATE_DELAY_CLOSE
#define FCB_STATE_DELAY_CLOSE
Definition: fatstruc.h:1203
FileName
struct _FileName FileName
Definition: fatprocs.h:897
FileAttributes
_Must_inspect_result_ _In_opt_ PFLT_INSTANCE _Out_ PHANDLE _In_ ACCESS_MASK _In_ POBJECT_ATTRIBUTES _Out_ PIO_STATUS_BLOCK _In_opt_ PLARGE_INTEGER _In_ ULONG FileAttributes
Definition: fltkernel.h:1236
FILE_OPEN_BY_FILE_ID
#define FILE_OPEN_BY_FILE_ID
Definition: from_kernel.h:41
FILE_OPEN
#define FILE_OPEN
Definition: from_kernel.h:54
FILE_CREATE
#define FILE_CREATE
Definition: from_kernel.h:55
FILE_OVERWRITE_IF
#define FILE_OVERWRITE_IF
Definition: from_kernel.h:58
FILE_NO_EA_KNOWLEDGE
#define FILE_NO_EA_KNOWLEDGE
Definition: from_kernel.h:36
FILE_NO_INTERMEDIATE_BUFFERING
#define FILE_NO_INTERMEDIATE_BUFFERING
Definition: from_kernel.h:28
FILE_OVERWRITE
#define FILE_OVERWRITE
Definition: from_kernel.h:57
FILE_OPEN_IF
#define FILE_OPEN_IF
Definition: from_kernel.h:56
FILE_SUPERSEDE
#define FILE_SUPERSEDE
Definition: from_kernel.h:53
FsRtlEnterFileSystem
#define FsRtlEnterFileSystem
RemainingPart
_Out_ PANSI_STRING _Out_ PANSI_STRING RemainingPart
Definition: fsrtlfuncs.h:379
FsRtlExitFileSystem
#define FsRtlExitFileSystem
OPLOCK_FLAG_OPLOCK_KEY_CHECK_ONLY
#define OPLOCK_FLAG_OPLOCK_KEY_CHECK_ONLY
Definition: fsrtltypes.h:267
OPLOCK_FLAG_BACK_OUT_ATOMIC_OPLOCK
#define OPLOCK_FLAG_BACK_OUT_ATOMIC_OPLOCK
Definition: fsrtltypes.h:268
CcSetFileSizes
VOID NTAPI CcSetFileSizes(IN PFILE_OBJECT FileObject, IN PCC_FILE_SIZES FileSizes)
Definition: fssup.c:356
CcUninitializeCacheMap
BOOLEAN NTAPI CcUninitializeCacheMap(IN PFILE_OBJECT FileObject, IN OPTIONAL PLARGE_INTEGER TruncateSize, IN OPTIONAL PCACHE_UNINITIALIZE_EVENT UninitializeEvent)
Definition: fssup.c:286
CcPurgeCacheSection
BOOLEAN NTAPI CcPurgeCacheSection(IN PSECTION_OBJECT_POINTERS SectionObjectPointer, IN OPTIONAL PLARGE_INTEGER FileOffset, IN ULONG Length, IN BOOLEAN UninitializeCacheMaps)
Definition: fssup.c:386
IoFreeMdl
#define IoFreeMdl
Definition: fxmdl.h:89
IoAllocateMdl
#define IoAllocateMdl
Definition: fxmdl.h:88
Status
Status
Definition: gdiplustypes.h:25
in
GLuint in
Definition: glext.h:9616
i
GLsizei GLenum const GLvoid GLsizei GLenum GLbyte GLbyte GLbyte GLdouble GLdouble GLdouble GLfloat GLfloat GLfloat GLint GLint GLint GLshort GLshort GLshort GLubyte GLubyte GLubyte GLuint GLuint GLuint GLushort GLushort GLushort GLbyte GLbyte GLbyte GLbyte GLdouble GLdouble GLdouble GLdouble GLfloat GLfloat GLfloat GLfloat GLint GLint GLint GLint GLshort GLshort GLshort GLshort GLubyte GLubyte GLubyte GLubyte GLuint GLuint GLuint GLuint GLushort GLushort GLushort GLushort GLboolean const GLdouble const GLfloat const GLint const GLshort const GLbyte const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLdouble const GLfloat const GLfloat const GLint const GLint const GLshort const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort GLenum GLenum GLenum GLfloat GLenum GLint GLenum GLenum GLenum GLfloat GLenum GLenum GLint GLenum GLfloat GLenum GLint GLint GLushort GLenum GLenum GLfloat GLenum GLenum GLint GLfloat const GLubyte GLenum GLenum GLenum const GLfloat GLenum GLenum const GLint GLenum GLint GLint GLsizei GLsizei GLint GLenum GLenum const GLvoid GLenum GLenum const GLfloat GLenum GLenum const GLint GLenum GLenum const GLdouble GLenum GLenum const GLfloat GLenum GLenum const GLint GLsizei GLuint GLfloat GLuint GLbitfield GLfloat GLint GLuint GLboolean GLenum GLfloat GLenum GLbitfield GLenum GLfloat GLfloat GLint GLint const GLfloat GLenum GLfloat GLfloat GLint GLint GLfloat GLfloat GLint GLint const GLfloat GLint GLfloat GLfloat GLint GLfloat GLfloat GLint GLfloat GLfloat const GLdouble const GLfloat const GLdouble const GLfloat GLint i
Definition: glfuncs.h:248
FILE_OPEN_REQUIRING_OPLOCK
#define FILE_OPEN_REQUIRING_OPLOCK
Definition: winternl.h:186
RtlDowncaseUnicodeString
NTSYSAPI NTSTATUS WINAPI RtlDowncaseUnicodeString(UNICODE_STRING *, const UNICODE_STRING *, BOOLEAN)
RtlUpcaseUnicodeStringToCountedOemString
NTSYSAPI NTSTATUS WINAPI RtlUpcaseUnicodeStringToCountedOemString(STRING *, const UNICODE_STRING *, BOOLEAN)
EXCEPTION_EXECUTE_HANDLER
#define EXCEPTION_EXECUTE_HANDLER
Definition: excpt.h:90
EXCEPTION_CONTINUE_SEARCH
#define EXCEPTION_CONTINUE_SEARCH
Definition: excpt.h:91
NOTHING
#define NOTHING
Definition: input_list.c:10
InterlockedCompareExchangePointer
#define InterlockedCompareExchangePointer
Definition: interlocked.h:144
if
if(dx< 0)
Definition: linetemp.h:194
CcIsThereDirtyData
BOOLEAN NTAPI CcIsThereDirtyData(IN PVPB Vpb)
Definition: logsup.c:55
PCHAR
#define PCHAR
Definition: match.c:90
SE_SECURITY_PRIVILEGE
#define SE_SECURITY_PRIVILEGE
Definition: security.c:662
Scripting::Hidden
@ Hidden
Definition: scrrun.idl:71
Scripting::System
@ System
Definition: scrrun.idl:72
UserMode
#define UserMode
Definition: asm.h:39
DRIVER_DISPATCH
DRIVER_DISPATCH(nfs41_FsdDispatch)
_Inout_
#define _Inout_
Definition: no_sal2.h:162
_Success_
#define _Success_(c)
Definition: no_sal2.h:84
_Outptr_result_maybenull_
#define _Outptr_result_maybenull_
Definition: no_sal2.h:266
_Out_
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Definition: no_sal2.h:160
_In_
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_Function_class_
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FILE_SHARE_WRITE
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FILE_DOES_NOT_EXIST
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FILE_WRITE_DATA
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Definition: nt_native.h:631
FILE_READ_DATA
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FILE_ATTRIBUTE_READONLY
#define FILE_ATTRIBUTE_READONLY
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Definition: nt_native.h:40
ACCESS_SYSTEM_SECURITY
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Definition: nt_native.h:77
FILE_ATTRIBUTE_HIDDEN
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Definition: nt_native.h:703
PACCESS_MASK
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Definition: nt_native.h:41
FILE_ATTRIBUTE_SYSTEM
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Definition: nt_native.h:704
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FILE_OVERWRITTEN
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Definition: nt_native.h:771
FILE_SHARE_DELETE
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FILE_EXECUTE
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FILE_SUPERSEDED
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FILE_WRITE_ATTRIBUTES
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FILE_OPENED
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MAXIMUM_ALLOWED
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FILE_ATTRIBUTE_TEMPORARY
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UNREFERENCED_PARAMETER
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ARGUMENT_PRESENT
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ExReleaseResourceLite
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FsRtlAllocatePoolWithTag
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FsRtlDissectName
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VOID NTAPI IoSetShareAccess(IN ACCESS_MASK DesiredAccess, IN ULONG DesiredShareAccess, IN PFILE_OBJECT FileObject, OUT PSHARE_ACCESS ShareAccess)
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IoCheckShareAccess
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Definition: file.c:3391
IoRemoveShareAccess
VOID NTAPI IoRemoveShareAccess(IN PFILE_OBJECT FileObject, IN PSHARE_ACCESS ShareAccess)
Definition: file.c:3479
IoUpdateShareAccess
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IoSetTopLevelIrp
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SeSinglePrivilegeCheck
BOOLEAN NTAPI SeSinglePrivilegeCheck(_In_ LUID PrivilegeValue, _In_ KPROCESSOR_MODE PreviousMode)
Checks if a single privilege is present in the context of the calling thread.
Definition: priv.c:744
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STATUS_VOLUME_DISMOUNTED
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STATUS_FILE_INVALID
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STATUS_EAS_NOT_SUPPORTED
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STATUS_CANNOT_BREAK_OPLOCK
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STATUS_UNMAPPABLE_CHARACTER
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Definition: ntstatus.h:590
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BOOLEAN NTAPI FsRtlCurrentBatchOplock(IN POPLOCK Oplock)
Definition: oplock.c:1364
FsRtlOplockFsctrl
NTSTATUS NTAPI FsRtlOplockFsctrl(IN POPLOCK Oplock, IN PIRP Irp, IN ULONG OpenCount)
Definition: oplock.c:1430
FsRtlCheckOplock
NTSTATUS NTAPI FsRtlCheckOplock(IN POPLOCK Oplock, IN PIRP Irp, IN PVOID Context, IN POPLOCK_WAIT_COMPLETE_ROUTINE CompletionRoutine OPTIONAL, IN POPLOCK_FS_PREPOST_IRP PostIrpRoutine OPTIONAL)
Definition: oplock.c:1170
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USHORT
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_SEH2_AbnormalTermination
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_SEH2_GetExceptionCode
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Definition: pseh2_64.h:181
_SEH2_EXCEPT
#define _SEH2_EXCEPT(...)
Definition: pseh2_64.h:82
_SEH2_FINALLY
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Definition: pseh2_64.h:130
_SEH2_GetExceptionInformation
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Definition: pseh2_64.h:180
_SEH2_END
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AbnormalTermination
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Definition: exception.h:76
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Definition: exception.h:72
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Definition: exception.h:68
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@ OpenDirectory
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KERNEL_STACK_SIZE
#define KERNEL_STACK_SIZE
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BOOLEAN NTAPI MmCanFileBeTruncated(_In_ PSECTION_OBJECT_POINTERS SectionObjectPointer, _In_opt_ PLARGE_INTEGER NewFileSize)
Definition: section.c:4306
MmFlushImageSection
BOOLEAN NTAPI MmFlushImageSection(IN PSECTION_OBJECT_POINTERS SectionObjectPointer, IN MMFLUSH_TYPE FlushType)
Definition: section.c:4407
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#define STATUS_CANNOT_DELETE
Definition: shellext.h:71
STATUS_MORE_PROCESSING_REQUIRED
#define STATUS_MORE_PROCESSING_REQUIRED
Definition: shellext.h:68
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Definition: shellext.h:65
IRP_CONTEXT
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_ACCESS_STATE
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_ANSI_STRING::Buffer
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_ANSI_STRING::Length
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_CCB::UnicodeQueryTemplate
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FAT8DOT3 Constant
Definition: fatstruc.h:1426
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Definition: cdstruc.h:1080
_CCB::OemQueryTemplate
union _CCB::@852::@854::@856 OemQueryTemplate
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BOOLEAN ContainsWildCards
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_DEVICE_OBJECT
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_DIRENT
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Definition: cdstruc.h:1648
_FAT_CALLOUT_PARAMETERS
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_FAT_CALLOUT_PARAMETERS::Create
struct _FAT_CALLOUT_PARAMETERS::@859::@861 Create
_FAT_CALLOUT_PARAMETERS::ExceptionStatus
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Definition: fatstruc.h:1787
_FAT_CALLOUT_PARAMETERS::IrpStatus
NTSTATUS IrpStatus
Definition: fatstruc.h:1786
_FAT_DATA::ChicagoMode
BOOLEAN ChicagoMode
Definition: fatstruc.h:87
_FAT_DATA::AsyncCloseList
LIST_ENTRY AsyncCloseList
Definition: fatstruc.h:132
_FAT_DATA::DelayedCloseList
LIST_ENTRY DelayedCloseList
Definition: fatstruc.h:139
_FCB
Definition: cdstruc.h:902
_FCB::ParentDcb
struct _FCB * ParentDcb
Definition: fatstruc.h:836
_FCB::Flags
ULONG Flags
Definition: ntfs.h:536
_FCB::Vcb
PVCB Vcb
Definition: cdstruc.h:933
_FCB::ExactCaseLongName
UNICODE_STRING ExactCaseLongName
Definition: fatstruc.h:1139
_FCB::ShareAccess
SHARE_ACCESS ShareAccess
Definition: cdstruc.h:1009
_FCB::FullFileName
UNICODE_STRING FullFileName
Definition: fatstruc.h:1122
_FCB::EaModificationCount
ULONG EaModificationCount
Definition: fatstruc.h:1107
_FCB::Dcb
struct _FCB::@848::@850 Dcb
_FCB::FcbCondition
FCB_CONDITION FcbCondition
Definition: fatstruc.h:850
_FCB::LastWriteTime
LARGE_INTEGER LastWriteTime
Definition: fatstruc.h:922
_FCB::OpenCount
CLONG OpenCount
Definition: fatstruc.h:881
_FCB::UncleanCount
CLONG UncleanCount
Definition: fatstruc.h:873
_FCB::Specific
union _FCB::@848 Specific
_FCB::ValidDataToDisk
ULONG ValidDataToDisk
Definition: fatstruc.h:928
_FCB::Header
FSRTL_ADVANCED_FCB_HEADER Header
Definition: cdstruc.h:925
_FCB::FcbState
ULONG FcbState
Definition: cdstruc.h:971
_FCB::ShortName
FILE_NAME_NODE ShortName
Definition: fatstruc.h:1115
_FCB::DirentFatFlags
UCHAR DirentFatFlags
Definition: fatstruc.h:1133
_FCB::NonPaged
PNON_PAGED_FCB NonPaged
Definition: fatstruc.h:811
_FCB::NonCachedUncleanCount
CLONG NonCachedUncleanCount
Definition: fatstruc.h:888
_FILE_FULL_EA_INFORMATION
Definition: from_kernel.h:193
_FILE_NAME_NODE::Name
union _FILE_NAME_NODE::@847 Name
_FILE_NAME_NODE::Oem
OEM_STRING Oem
Definition: fatstruc.h:693
_FileName
Definition: filecomp.c:348
_IO_STACK_LOCATION
Definition: Bus_PDO_EvalMethod.c:93
_IO_STACK_LOCATION::FileObject
PFILE_OBJECT FileObject
Definition: iotypes.h:3169
_IO_STACK_LOCATION::Buffer
PVOID Buffer
Definition: iotypes.h:3259
_IO_STACK_LOCATION::FileName
PUNICODE_STRING FileName
Definition: iotypes.h:3149
_IO_STACK_LOCATION::DeviceObject
PDEVICE_OBJECT DeviceObject
Definition: iotypes.h:3223
_IO_STACK_LOCATION::ShareAccess
USHORT ShareAccess
Definition: iotypes.h:3120
_IO_STACK_LOCATION::Length
ULONG Length
Definition: iotypes.h:3138
_IO_STACK_LOCATION::Create
struct _IO_STACK_LOCATION::@4234::@4235 Create
_IO_STACK_LOCATION::Parameters
union _IO_STACK_LOCATION::@1701 Parameters
_IO_STACK_LOCATION::Flags
UCHAR Flags
Definition: iotypes.h:3113
_IO_STATUS_BLOCK
Definition: env_spec_w32.h:870
_IRP
Definition: Bus_PDO_EvalMethod.c:105
_KEVENT
Definition: ketypes.h:811
_LUID
Definition: devicetopology.idl:137
_NON_PAGED_FCB::SectionObjectPointers
SECTION_OBJECT_POINTERS SectionObjectPointers
Definition: fatstruc.h:729
_SECTION_OBJECT_POINTERS::DataSectionObject
PVOID DataSectionObject
Definition: env_spec_w32.h:761
_STRING
Definition: sprintf.c:450
_STRING::Length
unsigned short Length
Definition: sprintf.c:451
_STRING::Buffer
void * Buffer
Definition: sprintf.c:453
_UNICODE_STRING
Definition: env_spec_w32.h:368
_UNICODE_STRING::Length
USHORT Length
Definition: env_spec_w32.h:369
_UNICODE_STRING::MaximumLength
USHORT MaximumLength
Definition: env_spec_w32.h:370
_UNICODE_STRING::Buffer
PWSTR Buffer
Definition: env_spec_w32.h:371
_VCB
Definition: cdstruc.h:498
_VCB::ReadOnlyCount
CLONG ReadOnlyCount
Definition: fatstruc.h:313
_VCB::OpenFileCount
CLONG OpenFileCount
Definition: fatstruc.h:312
_VCB::VcbState
ULONG VcbState
Definition: cdstruc.h:540
_VOLUME_DEVICE_OBJECT
Definition: cdstruc.h:727
status
Definition: ps.c:97
KeCancelTimer
BOOLEAN NTAPI KeCancelTimer(IN OUT PKTIMER Timer)
Definition: timerobj.c:206
FsRtlFindInTunnelCache
BOOLEAN NTAPI FsRtlFindInTunnelCache(IN PTUNNEL Cache, IN ULONGLONG DirectoryKey, IN PUNICODE_STRING Name, OUT PUNICODE_STRING ShortName, OUT PUNICODE_STRING LongName, IN OUT PULONG DataLength, OUT PVOID Data)
Definition: tunnel.c:766
PBOOLEAN
unsigned char * PBOOLEAN
Definition: typedefs.h:53
NTAPI
#define NTAPI
Definition: typedefs.h:36
LARGE_INTEGER
union _LARGE_INTEGER LARGE_INTEGER
RtlCopyMemory
#define RtlCopyMemory(Destination, Source, Length)
Definition: typedefs.h:263
ULONG_PTR
uint32_t ULONG_PTR
Definition: typedefs.h:65
RtlMoveMemory
#define RtlMoveMemory(Destination, Source, Length)
Definition: typedefs.h:264
PUCHAR
unsigned char * PUCHAR
Definition: typedefs.h:53
ULONG
uint32_t ULONG
Definition: typedefs.h:59
STATUS_FILE_IS_A_DIRECTORY
#define STATUS_FILE_IS_A_DIRECTORY
Definition: udferr_usr.h:164
STATUS_NOT_A_DIRECTORY
#define STATUS_NOT_A_DIRECTORY
Definition: udferr_usr.h:169
STATUS_MEDIA_WRITE_PROTECTED
#define STATUS_MEDIA_WRITE_PROTECTED
Definition: udferr_usr.h:161
STATUS_ACCESS_DENIED
#define STATUS_ACCESS_DENIED
Definition: udferr_usr.h:145
STATUS_OBJECT_PATH_NOT_FOUND
#define STATUS_OBJECT_PATH_NOT_FOUND
Definition: udferr_usr.h:151
STATUS_INVALID_PARAMETER
#define STATUS_INVALID_PARAMETER
Definition: udferr_usr.h:135
STATUS_OBJECT_NAME_COLLISION
#define STATUS_OBJECT_NAME_COLLISION
Definition: udferr_usr.h:150
STATUS_VERIFY_REQUIRED
#define STATUS_VERIFY_REQUIRED
Definition: udferr_usr.h:130
STATUS_SHARING_VIOLATION
#define STATUS_SHARING_VIOLATION
Definition: udferr_usr.h:154
STATUS_DISK_FULL
#define STATUS_DISK_FULL
Definition: udferr_usr.h:155
STATUS_OBJECT_NAME_INVALID
#define STATUS_OBJECT_NAME_INVALID
Definition: udferr_usr.h:148
STATUS_INSUFFICIENT_RESOURCES
#define STATUS_INSUFFICIENT_RESOURCES
Definition: udferr_usr.h:158
STATUS_OBJECT_NAME_NOT_FOUND
#define STATUS_OBJECT_NAME_NOT_FOUND
Definition: udferr_usr.h:149
OEM_STRING
STRING OEM_STRING
Definition: umtypes.h:203
_LARGE_INTEGER
Definition: typedefs.h:103
_LARGE_INTEGER::QuadPart
LONGLONG QuadPart
Definition: typedefs.h:114
DeviceObject
_In_ PDEVICE_OBJECT DeviceObject
Definition: wdfdevice.h:2055
DesiredAccess
_Must_inspect_result_ _In_ WDFDEVICE _In_ ULONG _In_ ACCESS_MASK DesiredAccess
Definition: wdfdevice.h:2658
FileObject
_In_ WDFREQUEST _In_ WDFFILEOBJECT FileObject
Definition: wdfdevice.h:550
Options
_In_ PWDFDEVICE_INIT _In_ PWDF_REMOVE_LOCK_OPTIONS Options
Definition: wdfdevice.h:3534
CreateDisposition
_Must_inspect_result_ _In_opt_ WDFKEY _In_ PCUNICODE_STRING _In_ ACCESS_MASK _In_ ULONG _Out_opt_ PULONG CreateDisposition
Definition: wdfregistry.h:120
CreateDirectory
#define CreateDirectory
Definition: winbase.h:3787
EaBuffer
_In_ ACCESS_MASK _In_ POBJECT_ATTRIBUTES _Out_ PIO_STATUS_BLOCK _In_opt_ PLARGE_INTEGER _In_ ULONG _In_ ULONG _In_ ULONG _In_ ULONG _In_opt_ PVOID EaBuffer
Definition: iofuncs.h:845
FILE_OPBATCH_BREAK_UNDERWAY
#define FILE_OPBATCH_BREAK_UNDERWAY
SL_OPEN_PAGING_FILE
#define SL_OPEN_PAGING_FILE
Definition: iotypes.h:1817
FILE_NOTIFY_CHANGE_SIZE
#define FILE_NOTIFY_CHANGE_SIZE
FILE_ACTION_MODIFIED
#define FILE_ACTION_MODIFIED
SL_FORCE_ACCESS_CHECK
#define SL_FORCE_ACCESS_CHECK
Definition: iotypes.h:1816
FO_FILE_FAST_IO_READ
#define FO_FILE_FAST_IO_READ
Definition: iotypes.h:1795
FILE_NOTIFY_CHANGE_ATTRIBUTES
#define FILE_NOTIFY_CHANGE_ATTRIBUTES
FILE_NOTIFY_CHANGE_FILE_NAME
#define FILE_NOTIFY_CHANGE_FILE_NAME
PFILE_OBJECT
* PFILE_OBJECT
Definition: iotypes.h:1998
IO_DISK_INCREMENT
#define IO_DISK_INCREMENT
Definition: iotypes.h:600
FO_NO_INTERMEDIATE_BUFFERING
#define FO_NO_INTERMEDIATE_BUFFERING
Definition: iotypes.h:1778
FO_CACHE_SUPPORTED
#define FO_CACHE_SUPPORTED
Definition: iotypes.h:1781
FILE_NOTIFY_CHANGE_LAST_WRITE
#define FILE_NOTIFY_CHANGE_LAST_WRITE
FILE_NOTIFY_CHANGE_EA
#define FILE_NOTIFY_CHANGE_EA
SL_OPEN_TARGET_DIRECTORY
#define SL_OPEN_TARGET_DIRECTORY
Definition: iotypes.h:1818
FILE_ACTION_ADDED
#define FILE_ACTION_ADDED
FILE_NOTIFY_CHANGE_DIR_NAME
#define FILE_NOTIFY_CHANGE_DIR_NAME
KPROCESSOR_MODE
CCHAR KPROCESSOR_MODE
Definition: ketypes.h:7
ObDereferenceObject
#define ObDereferenceObject
Definition: obfuncs.h:203
NT_ASSERT
#define NT_ASSERT
Definition: rtlfuncs.h:3327
Prefix
_In_ __drv_aliasesMem PSTRING Prefix
Definition: rtlfuncs.h:1647
AccessState
_In_opt_ PVOID _In_opt_ PUNICODE_STRING _In_ PSECURITY_DESCRIPTOR _In_ PACCESS_STATE AccessState
Definition: sefuncs.h:417
UCHAR
unsigned char UCHAR
Definition: xmlstorage.h:181
WCHAR
__wchar_t WCHAR
Definition: xmlstorage.h:180
NotifyFilter
_In_opt_ HANDLE _In_opt_ PIO_APC_ROUTINE _In_opt_ PVOID _Out_ PIO_STATUS_BLOCK _In_ ULONG NotifyFilter
Definition: zwfuncs.h:504