ReactOS  0.4.13-dev-235-g7373cb3
fsctl.c
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1 /*
2  * COPYRIGHT: See COPYRIGHT.TXT
3  * PROJECT: Ext2 File System Driver for WinNT/2K/XP
4  * FILE: fsctl.c
5  * PROGRAMMER: Matt Wu <mattwu@163.com>
6  * HOMEPAGE: http://www.ext2fsd.com
7  * UPDATE HISTORY:
8  */
9 
10 /* INCLUDES *****************************************************************/
11 
12 #include "ext2fs.h"
13 
14 /* GLOBALS ***************************************************************/
15 
16 extern PEXT2_GLOBAL Ext2Global;
17 
18 /* DEFINITIONS *************************************************************/
19 
20 #ifdef ALLOC_PRAGMA
21 #pragma alloc_text(PAGE, Ext2IsHandleCountZero)
22 #pragma alloc_text(PAGE, Ext2LockVcb)
23 #pragma alloc_text(PAGE, Ext2LockVolume)
24 #pragma alloc_text(PAGE, Ext2UnlockVcb)
25 #pragma alloc_text(PAGE, Ext2UnlockVolume)
26 #pragma alloc_text(PAGE, Ext2AllowExtendedDasdIo)
27 #pragma alloc_text(PAGE, Ext2GetRetrievalPointerBase)
28 #pragma alloc_text(PAGE, Ext2QueryExtentMappings)
29 #pragma alloc_text(PAGE, Ext2QueryRetrievalPointers)
30 #pragma alloc_text(PAGE, Ext2GetRetrievalPointers)
31 #pragma alloc_text(PAGE, Ext2UserFsRequest)
32 #pragma alloc_text(PAGE, Ext2IsMediaWriteProtected)
33 #pragma alloc_text(PAGE, Ext2MountVolume)
34 #pragma alloc_text(PAGE, Ext2PurgeVolume)
35 #pragma alloc_text(PAGE, Ext2PurgeFile)
36 #pragma alloc_text(PAGE, Ext2DismountVolume)
37 #pragma alloc_text(PAGE, Ext2IsVolumeMounted)
38 #pragma alloc_text(PAGE, Ext2VerifyVolume)
39 #pragma alloc_text(PAGE, Ext2FileSystemControl)
40 #endif
41 
42 
43 VOID
44 Ext2SetVpbFlag (
45  IN PVPB Vpb,
46  IN USHORT Flag )
47 {
48  KIRQL OldIrql;
49 
50  IoAcquireVpbSpinLock(&OldIrql);
51  Vpb->Flags |= Flag;
52  IoReleaseVpbSpinLock(OldIrql);
53 }
54 
55 VOID
56 Ext2ClearVpbFlag (
57  IN PVPB Vpb,
58  IN USHORT Flag )
59 {
60  KIRQL OldIrql;
61 
62  IoAcquireVpbSpinLock(&OldIrql);
63  Vpb->Flags &= ~Flag;
64  IoReleaseVpbSpinLock(OldIrql);
65 }
66 
67 BOOLEAN
68 Ext2IsHandleCountZero(IN PEXT2_VCB Vcb)
69 {
70  PEXT2_FCB Fcb;
71  PLIST_ENTRY List;
72 
73  for ( List = Vcb->FcbList.Flink;
74  List != &Vcb->FcbList;
75  List = List->Flink ) {
76 
77  Fcb = CONTAINING_RECORD(List, EXT2_FCB, Next);
78 
79  ASSERT((Fcb->Identifier.Type == EXT2FCB) &&
80  (Fcb->Identifier.Size == sizeof(EXT2_FCB)));
81 
82  DEBUG(DL_INF, ( "Ext2IsHandleCountZero: Inode:%xh File:%S OpenHandleCount=%xh\n",
83  Fcb->Inode->i_ino, Fcb->Mcb->ShortName.Buffer, Fcb->OpenHandleCount));
84 
85  if (Fcb->OpenHandleCount) {
86  return FALSE;
87  }
88  }
89 
90  return TRUE;
91 }
92 
93 NTSTATUS
94 Ext2LockVcb (IN PEXT2_VCB Vcb,
95  IN PFILE_OBJECT FileObject)
96 {
97  NTSTATUS Status = STATUS_SUCCESS;
98 
99  _SEH2_TRY {
100 
101  if (FlagOn(Vcb->Flags, VCB_VOLUME_LOCKED)) {
102  DEBUG(DL_INF, ( "Ext2LockVolume: Volume is already locked.\n"));
103  Status = STATUS_ACCESS_DENIED;
104  _SEH2_LEAVE;
105  }
106 
107  if (Vcb->OpenHandleCount > (ULONG)(FileObject ? 1 : 0)) {
108  DEBUG(DL_INF, ( "Ext2LockVcb: There are still opened files.\n"));
109 
110  Status = STATUS_ACCESS_DENIED;
111  _SEH2_LEAVE;
112  }
113 
114  if (!Ext2IsHandleCountZero(Vcb)) {
115  DEBUG(DL_INF, ( "Ext2LockVcb: Thare are still opened files.\n"));
116 
117  Status = STATUS_ACCESS_DENIED;
118  _SEH2_LEAVE;
119  }
120 
121  SetLongFlag(Vcb->Flags, VCB_VOLUME_LOCKED);
122  Ext2SetVpbFlag(Vcb->Vpb, VPB_LOCKED);
123  Vcb->LockFile = FileObject;
124 
125  DEBUG(DL_INF, ( "Ext2LockVcb: Volume locked.\n"));
126 
127  } _SEH2_FINALLY {
128  // Nothing
129  } _SEH2_END;
130 
131  return Status;
132 }
133 
134 
135 NTSTATUS
136 Ext2LockVolume (IN PEXT2_IRP_CONTEXT IrpContext)
137 {
138  PIO_STACK_LOCATION IrpSp;
139  PDEVICE_OBJECT DeviceObject;
140  PEXT2_VCB Vcb = NULL;
141  NTSTATUS Status;
142  BOOLEAN VcbResourceAcquired = FALSE;
143 
144  _SEH2_TRY {
145 
146  ASSERT(IrpContext != NULL);
147 
148  ASSERT((IrpContext->Identifier.Type == EXT2ICX) &&
149  (IrpContext->Identifier.Size == sizeof(EXT2_IRP_CONTEXT)));
150 
151  DeviceObject = IrpContext->DeviceObject;
152 
153  Status = STATUS_UNSUCCESSFUL;
154 
155  //
156  // This request is not allowed on the main device object
157  //
158  if (IsExt2FsDevice(DeviceObject)) {
159  Status = STATUS_INVALID_PARAMETER;
160  _SEH2_LEAVE;
161  }
162 
163  Vcb = (PEXT2_VCB) DeviceObject->DeviceExtension;
164 
165  ASSERT(Vcb != NULL);
166 
167  ASSERT((Vcb->Identifier.Type == EXT2VCB) &&
168  (Vcb->Identifier.Size == sizeof(EXT2_VCB)));
169 
170  ASSERT(IsMounted(Vcb));
171 
172  IrpSp = IoGetCurrentIrpStackLocation(IrpContext->Irp);
173 
174 #if (_WIN32_WINNT >= 0x0500)
175  CcWaitForCurrentLazyWriterActivity();
176 #endif
177  ExAcquireResourceExclusiveLite(
178  &Vcb->MainResource,
179  TRUE );
180 
181  VcbResourceAcquired = TRUE;
182 
183  /* flush dirty data before locking the volume */
184  if (!IsVcbReadOnly(Vcb)) {
185  Ext2FlushFiles(IrpContext, Vcb, FALSE);
186  Ext2FlushVolume(IrpContext, Vcb, FALSE);
187  }
188 
189  Status = Ext2LockVcb(Vcb, IrpSp->FileObject);
190 
191  } _SEH2_FINALLY {
192 
193  if (VcbResourceAcquired) {
194  ExReleaseResourceLite(&Vcb->MainResource);
195  }
196 
197  if (!IrpContext->ExceptionInProgress) {
198  Ext2CompleteIrpContext(IrpContext, Status);
199  }
200  } _SEH2_END;
201 
202  return Status;
203 }
204 
205 NTSTATUS
206 Ext2UnlockVcb ( IN PEXT2_VCB Vcb,
207  IN PFILE_OBJECT FileObject )
208 {
209  NTSTATUS Status;
210 
211  _SEH2_TRY {
212 
213  if (FileObject && FileObject->FsContext != Vcb) {
214  Status = STATUS_NOT_LOCKED;
215  _SEH2_LEAVE;
216  }
217 
218  if (!FlagOn(Vcb->Flags, VCB_VOLUME_LOCKED)) {
219  DEBUG(DL_ERR, ( ": Ext2UnlockVcb: Volume is not locked.\n"));
220  Status = STATUS_NOT_LOCKED;
221  _SEH2_LEAVE;
222  }
223 
224  if (Vcb->LockFile == FileObject) {
225  ClearFlag(Vcb->Flags, VCB_VOLUME_LOCKED);
226  Ext2ClearVpbFlag(Vcb->Vpb, VPB_LOCKED);
227  DEBUG(DL_INF, ( "Ext2UnlockVcb: Volume unlocked.\n"));
228  Status = STATUS_SUCCESS;
229  } else {
230  Status = STATUS_NOT_LOCKED;
231  }
232 
233  } _SEH2_FINALLY {
234  // Nothing
235  } _SEH2_END;
236 
237  return Status;
238 }
239 
240 NTSTATUS
241 Ext2UnlockVolume (
242  IN PEXT2_IRP_CONTEXT IrpContext
243 )
244 {
245  PIO_STACK_LOCATION IrpSp = NULL;
246  PDEVICE_OBJECT DeviceObject = NULL;
247  PEXT2_VCB Vcb = NULL;
248  NTSTATUS Status;
249  BOOLEAN VcbResourceAcquired = FALSE;
250 
251  _SEH2_TRY {
252 
253  ASSERT(IrpContext != NULL);
254  ASSERT((IrpContext->Identifier.Type == EXT2ICX) &&
255  (IrpContext->Identifier.Size == sizeof(EXT2_IRP_CONTEXT)));
256 
257  DeviceObject = IrpContext->DeviceObject;
258  IrpSp = IoGetCurrentIrpStackLocation(IrpContext->Irp);
259 
260  //
261  // This request is not allowed on the main device object
262  //
263  if (IsExt2FsDevice(DeviceObject)) {
264  Status = STATUS_INVALID_PARAMETER;
265  _SEH2_LEAVE;
266  }
267 
268  Vcb = (PEXT2_VCB) DeviceObject->DeviceExtension;
269  ASSERT(Vcb != NULL);
270  ASSERT((Vcb->Identifier.Type == EXT2VCB) &&
271  (Vcb->Identifier.Size == sizeof(EXT2_VCB)));
272 
273  ExAcquireResourceExclusiveLite(
274  &Vcb->MainResource,
275  TRUE );
276  VcbResourceAcquired = TRUE;
277 
278  Status = Ext2UnlockVcb(Vcb, IrpSp->FileObject);
279 
280  } _SEH2_FINALLY {
281 
282  if (VcbResourceAcquired) {
283  ExReleaseResourceLite(&Vcb->MainResource);
284  }
285 
286  if (!IrpContext->ExceptionInProgress) {
287  Ext2CompleteIrpContext(IrpContext, Status);
288  }
289  } _SEH2_END;
290 
291  return Status;
292 }
293 
294 
295 NTSTATUS
296 Ext2InvalidateVolumes ( IN PEXT2_IRP_CONTEXT IrpContext )
297 {
298  NTSTATUS Status;
299  PIRP Irp;
300  PIO_STACK_LOCATION IrpSp;
301 
302 #ifndef __REACTOS__
303  PVPB NewVpb = NULL;
304 #endif
305  HANDLE Handle;
306  PLIST_ENTRY ListEntry;
307 
308  ULONG InputLength = 0;
309  PFILE_OBJECT FileObject;
310  PDEVICE_OBJECT DeviceObject;
311  BOOLEAN GlobalResourceAcquired = FALSE;
312 
313  LUID Privilege = {SE_TCB_PRIVILEGE, 0};
314 
315  _SEH2_TRY {
316 
317  Irp = IrpContext->Irp;
318  IrpSp = IoGetCurrentIrpStackLocation(Irp);
319 
320  if (!IsExt2FsDevice(IrpSp->DeviceObject)) {
321  Status = STATUS_INVALID_DEVICE_REQUEST;
322  _SEH2_LEAVE;
323  }
324 
325  if (!SeSinglePrivilegeCheck(Privilege, Irp->RequestorMode)) {
326  Status = STATUS_PRIVILEGE_NOT_HELD;
327  _SEH2_LEAVE;
328  }
329 
330 
331 #ifndef _GNU_NTIFS_
332  InputLength = IrpSp->Parameters.FileSystemControl.InputBufferLength;
333 #else
334  InputLength = ((PEXTENDED_IO_STACK_LOCATION)(IrpSp))->
335  Parameters.FileSystemControl.InputBufferLength;
336 #endif
337 
338 #if defined(_WIN64)
339  if (IoIs32bitProcess(Irp)) {
340  if (InputLength != sizeof(UINT32)) {
341  Status = STATUS_INVALID_PARAMETER;
342  _SEH2_LEAVE;
343  }
344  Handle = (HANDLE) LongToHandle( (*(PUINT32)Irp->AssociatedIrp.SystemBuffer) );
345  } else
346 #endif
347  {
348  if (InputLength != sizeof(HANDLE)) {
349  Status = STATUS_INVALID_PARAMETER;
350  _SEH2_LEAVE;
351  }
352  Handle = *(PHANDLE)Irp->AssociatedIrp.SystemBuffer;
353  }
354 
355  Status = ObReferenceObjectByHandle( Handle,
356  0,
357  *IoFileObjectType,
358  KernelMode,
359  (void **)&FileObject,
360  NULL );
361 
362  if (!NT_SUCCESS(Status)) {
363  _SEH2_LEAVE;
364  } else {
365  DeviceObject = FileObject->DeviceObject;
366  ObDereferenceObject(FileObject);
367  }
368 
369  ExAcquireResourceExclusiveLite(&Ext2Global->Resource, TRUE);
370  GlobalResourceAcquired = TRUE;
371 
372  ListEntry = Ext2Global->VcbList.Flink;
373  while (ListEntry != &Ext2Global->VcbList) {
374 
375  PEXT2_VCB Vcb = CONTAINING_RECORD(ListEntry, EXT2_VCB, Next);
376  ListEntry = ListEntry->Flink;
377 
378  DEBUG(DL_DBG, ( "Ext2InvalidateVolumes: Vcb=%xh Vcb->Vpb=%xh "
379  "Blink = %p &Vcb->Next = %p\n",
380  Vcb, Vcb->Vpb, ListEntry->Blink, &Vcb->Next));
381 
382  if (Vcb->Vpb && (Vcb->Vpb->RealDevice == DeviceObject)) {
383 
384  DEBUG(DL_DBG, ( "Ext2InvalidateVolumes: Got Vcb=%xh Vcb->Vpb=%xh "
385  "Blink = %p &Vcb->Next = %p\n",
386  Vcb, Vcb->Vpb, ListEntry->Blink, &Vcb->Next));
387  /* dismount the volume */
388  Ext2CheckDismount(IrpContext, Vcb, FALSE);
389  }
390  }
391 
392  } _SEH2_FINALLY {
393 
394  if (GlobalResourceAcquired) {
395  ExReleaseResourceLite(&Ext2Global->Resource);
396  }
397 
398  if (!IrpContext->ExceptionInProgress) {
399  Ext2CompleteIrpContext(IrpContext, Status);
400  }
401  } _SEH2_END;
402 
403  return Status;
404 }
405 
406 NTSTATUS
407 Ext2AllowExtendedDasdIo(IN PEXT2_IRP_CONTEXT IrpContext)
408 {
409  PIO_STACK_LOCATION IrpSp;
410  PEXT2_VCB Vcb;
411  PEXT2_CCB Ccb;
412  NTSTATUS status;
413 
414  IrpSp = IoGetCurrentIrpStackLocation(IrpContext->Irp);
415 
416  Vcb = (PEXT2_VCB) IrpSp->FileObject->FsContext;
417  Ccb = (PEXT2_CCB) IrpSp->FileObject->FsContext2;
418 
419  ASSERT(Vcb != NULL);
420 
421  ASSERT((Vcb->Identifier.Type == EXT2VCB) &&
422  (Vcb->Identifier.Size == sizeof(EXT2_VCB)));
423 
424  ASSERT(IsMounted(Vcb));
425 
426  if (Ccb) {
427  SetLongFlag(Ccb->Flags, CCB_ALLOW_EXTENDED_DASD_IO);
428  status = STATUS_SUCCESS;
429  } else {
430  status = STATUS_INVALID_PARAMETER;
431  }
432 
433  Ext2CompleteIrpContext(IrpContext, status);
434  return status;
435 }
436 
437 /*
438  * Ext2OplockRequest
439  *
440  * oplock requests handler routine
441  *
442  * Arguments:
443  * IrpContext: the ext2 irp context
444  *
445  * Return Value:
446  * NTSTATUS: The return status for the operation
447  *
448  */
449 
450 NTSTATUS
451 Ext2OplockRequest (
452  IN PEXT2_IRP_CONTEXT IrpContext
453 )
454 {
455  NTSTATUS Status;
456 
457  ULONG FsCtrlCode;
458  PDEVICE_OBJECT DeviceObject;
459  PFILE_OBJECT FileObject;
460 
461  PIRP Irp = NULL;
462  PIO_STACK_LOCATION IrpSp;
463  PEXTENDED_IO_STACK_LOCATION EIrpSp;
464 
465  PEXT2_VCB Vcb = NULL;
466  PEXT2_FCB Fcb = NULL;
467  PEXT2_CCB Ccb = NULL;
468 
469  ULONG OplockCount = 0;
470 
471  BOOLEAN VcbResourceAcquired = FALSE;
472  BOOLEAN FcbResourceAcquired = FALSE;
473 
474  ASSERT(IrpContext);
475 
476  _SEH2_TRY {
477 
478  Irp = IrpContext->Irp;
479  ASSERT(Irp);
480 
481  IrpSp = IoGetCurrentIrpStackLocation(Irp);
482  ASSERT(IrpSp);
483  EIrpSp = (PEXTENDED_IO_STACK_LOCATION)IrpSp;
484 
485  ASSERT((IrpContext->Identifier.Type == EXT2ICX) &&
486  (IrpContext->Identifier.Size == sizeof(EXT2_IRP_CONTEXT)));
487 
488  DeviceObject = IrpContext->DeviceObject;
489 
490  //
491  // This request is not allowed on the main device object
492  //
493  if (IsExt2FsDevice(DeviceObject)) {
494  Status = STATUS_INVALID_DEVICE_REQUEST;
495  _SEH2_LEAVE;
496  }
497 
498  Vcb = (PEXT2_VCB) DeviceObject->DeviceExtension;
499 
500  ASSERT(Vcb != NULL);
501 
502  ASSERT((Vcb->Identifier.Type == EXT2VCB) &&
503  (Vcb->Identifier.Size == sizeof(EXT2_VCB)));
504 
505  ASSERT(IsMounted(Vcb));
506 
507  FileObject = IrpContext->FileObject;
508 
509  Fcb = (PEXT2_FCB) FileObject->FsContext;
510 
511  //
512  // This request is not allowed on volumes
513  //
514 
515  if (Fcb == NULL || Fcb->Identifier.Type == EXT2VCB) {
516  Status = STATUS_INVALID_PARAMETER;
517  _SEH2_LEAVE;
518  }
519 
520  ASSERT((Fcb->Identifier.Type == EXT2FCB) &&
521  (Fcb->Identifier.Size == sizeof(EXT2_FCB)));
522 
523  if (IsFlagOn(Fcb->Mcb->Flags, MCB_FILE_DELETED)) {
524  Status = STATUS_FILE_DELETED;
525  _SEH2_LEAVE;
526  }
527 
528  Ccb = (PEXT2_CCB) FileObject->FsContext2;
529  if (Ccb == NULL) {
530  Status = STATUS_INVALID_PARAMETER;
531  _SEH2_LEAVE;
532  }
533 
534 
535  ASSERT((Ccb->Identifier.Type == EXT2CCB) &&
536  (Ccb->Identifier.Size == sizeof(EXT2_CCB)));
537 
538  FsCtrlCode = EIrpSp->Parameters.FileSystemControl.FsControlCode;
539 
540  switch (FsCtrlCode) {
541 
542  case FSCTL_REQUEST_OPLOCK_LEVEL_1:
543  case FSCTL_REQUEST_OPLOCK_LEVEL_2:
544  case FSCTL_REQUEST_BATCH_OPLOCK:
545 
546  VcbResourceAcquired =
547  ExAcquireResourceSharedLite(
548  &Vcb->MainResource,
549  IsFlagOn(IrpContext->Flags, IRP_CONTEXT_FLAG_WAIT) );
550 
551  ClearFlag(IrpContext->Flags, IRP_CONTEXT_FLAG_WAIT);
552 
553  FcbResourceAcquired =
554  ExAcquireResourceExclusiveLite (
555  &Fcb->MainResource,
556  IsFlagOn(IrpContext->Flags, IRP_CONTEXT_FLAG_WAIT));
557 
558  if (FsCtrlCode == FSCTL_REQUEST_OPLOCK_LEVEL_2) {
559  OplockCount = (ULONG) FsRtlAreThereCurrentFileLocks(&Fcb->FileLockAnchor);
560  } else {
561  OplockCount = Fcb->OpenHandleCount;
562  }
563 
564  break;
565 
566  case FSCTL_OPLOCK_BREAK_ACKNOWLEDGE:
567  case FSCTL_OPBATCH_ACK_CLOSE_PENDING :
568  case FSCTL_OPLOCK_BREAK_NOTIFY:
569  case FSCTL_OPLOCK_BREAK_ACK_NO_2:
570 
571  FcbResourceAcquired =
572  ExAcquireResourceSharedLite (
573  &Fcb->MainResource,
574  IsFlagOn(IrpContext->Flags, IRP_CONTEXT_FLAG_WAIT));
575 
576  break;
577 
578  default:
579 
580  Ext2BugCheck(EXT2_BUGCHK_FSCTL, FsCtrlCode, 0, 0);
581  }
582 
583 
584  //
585  // Call the FsRtl routine to grant/acknowledge oplock.
586  //
587 
588  Status = FsRtlOplockFsctrl( &Fcb->Oplock,
589  Irp,
590  OplockCount );
591 
592  //
593  // Set the flag indicating if Fast I/O is possible
594  //
595 
596  Fcb->Header.IsFastIoPossible = Ext2IsFastIoPossible(Fcb);
597  IrpContext->Irp = NULL;
598 
599  } _SEH2_FINALLY {
600 
601  if (FcbResourceAcquired) {
602  ExReleaseResourceLite(&Fcb->MainResource);
603  }
604 
605  if (VcbResourceAcquired) {
606  ExReleaseResourceLite(&Vcb->MainResource);
607  }
608 
609  if (!_SEH2_AbnormalTermination()) {
610  Ext2CompleteIrpContext(IrpContext, Status);
611  }
612  } _SEH2_END;
613 
614  return Status;
615 }
616 
617 NTSTATUS
618 Ext2IsVolumeDirty (
619  IN PEXT2_IRP_CONTEXT IrpContext
620 )
621 {
622  NTSTATUS status = STATUS_SUCCESS;
623  PIRP Irp;
624  PEXTENDED_IO_STACK_LOCATION IrpSp;
625  PULONG VolumeState;
626 
627  _SEH2_TRY {
628 
629  Irp = IrpContext->Irp;
630  IrpSp = (PEXTENDED_IO_STACK_LOCATION)IoGetCurrentIrpStackLocation(Irp);
631 
632  //
633  // Get a pointer to the output buffer. Look at the system buffer field in th
634  // irp first. Then the Irp Mdl.
635  //
636 
637  if (Irp->AssociatedIrp.SystemBuffer != NULL) {
638 
639  VolumeState = Irp->AssociatedIrp.SystemBuffer;
640 
641  } else if (Irp->MdlAddress != NULL) {
642 
643  VolumeState = MmGetSystemAddressForMdl( Irp->MdlAddress );
644 
645  } else {
646 
647  status = STATUS_INVALID_USER_BUFFER;
648  _SEH2_LEAVE;
649  }
650 
651  if (IrpSp->Parameters.FileSystemControl.OutputBufferLength < sizeof(ULONG)) {
652  status = STATUS_INVALID_PARAMETER;
653  _SEH2_LEAVE;
654  }
655 
656  *VolumeState = 0;
657 
658  } _SEH2_FINALLY {
659 
660  if (!IrpContext->ExceptionInProgress) {
661  Ext2CompleteIrpContext(IrpContext, status);
662  }
663  } _SEH2_END;
664 
665  return status;
666 }
667 
668 
669 NTSTATUS
670 Ext2QueryExtentMappings(
671  IN PEXT2_IRP_CONTEXT IrpContext,
672  IN PEXT2_VCB Vcb,
673  IN PEXT2_FCB Fcb,
674  IN PLARGE_INTEGER RequestVbn,
675  OUT PLARGE_INTEGER * pMappedRuns
676 )
677 {
678  PLARGE_INTEGER MappedRuns = NULL;
679  PLARGE_INTEGER PartialRuns = NULL;
680 
681  PEXT2_EXTENT Chain = NULL;
682  PEXT2_EXTENT Extent = NULL;
683 
684  LONGLONG Vbn = 0;
685  ULONG Length = 0;
686  ULONG i = 0;
687 
688  NTSTATUS Status = STATUS_SUCCESS;
689 
690  _SEH2_TRY {
691 
692  /* now building all the request extents */
693  while (Vbn < RequestVbn->QuadPart) {
694 
695  Length = 0x80000000; /* 2g bytes */
696  if (RequestVbn->QuadPart < Vbn + Length) {
697  Length = (ULONG)(RequestVbn->QuadPart - Vbn);
698  }
699 
700  /* build extents for sub-range */
701  Extent = NULL;
702  Status = Ext2BuildExtents(
703  IrpContext,
704  Vcb,
705  Fcb->Mcb,
706  Vbn,
707  Length,
708  FALSE,
709  &Extent);
710 
711  if (!NT_SUCCESS(Status)) {
712  _SEH2_LEAVE;
713  }
714 
715  if (Chain) {
716  Ext2JointExtents(Chain, Extent);
717  } else {
718  Chain = Extent;
719  }
720 
721  /* allocate extent array */
722  PartialRuns = Ext2AllocatePool(
723  NonPagedPool,
724  (Ext2CountExtents(Chain) + 2) *
725  (2 * sizeof(LARGE_INTEGER)),
726  'RE2E');
727 
728  if (PartialRuns == NULL) {
729  Status = STATUS_INSUFFICIENT_RESOURCES;
730  _SEH2_LEAVE;
731  }
732  RtlZeroMemory( PartialRuns,
733  (Ext2CountExtents(Chain) + 2) *
734  (2 * sizeof(LARGE_INTEGER)));
735 
736  if (MappedRuns) {
737  RtlMoveMemory(PartialRuns,
738  MappedRuns,
739  i * 2 * sizeof(LARGE_INTEGER));
740  Ext2FreePool(MappedRuns, 'RE2E');
741  }
742  MappedRuns = PartialRuns;
743 
744  /* walk all the Mcb runs in Extent */
745  for (; Extent != NULL; Extent = Extent->Next) {
746  MappedRuns[i*2 + 0].QuadPart = Vbn + Extent->Offset;
747  MappedRuns[i*2 + 1].QuadPart = Extent->Lba;
748  i = i+1;
749  }
750 
751  Vbn = Vbn + Length;
752  }
753 
754  *pMappedRuns = MappedRuns;
755 
756  } _SEH2_FINALLY {
757 
758  if (!NT_SUCCESS(Status) || Status == STATUS_PENDING) {
759  if (MappedRuns) {
760  Ext2FreePool(MappedRuns, 'RE2E');
761  }
762  *pMappedRuns = NULL;
763  }
764 
765  if (Chain) {
766  Ext2DestroyExtentChain(Chain);
767  }
768  } _SEH2_END;
769 
770  return Status;
771 }
772 
773 NTSTATUS
774 Ext2QueryRetrievalPointers (
775  IN PEXT2_IRP_CONTEXT IrpContext
776 )
777 {
778  PIRP Irp = NULL;
779  PIO_STACK_LOCATION IrpSp;
780  PEXTENDED_IO_STACK_LOCATION EIrpSp;
781 
782  PDEVICE_OBJECT DeviceObject;
783  PFILE_OBJECT FileObject;
784 
785  PEXT2_VCB Vcb = NULL;
786  PEXT2_FCB Fcb = NULL;
787  PEXT2_CCB Ccb = NULL;
788 
789  PLARGE_INTEGER RequestVbn;
790  PLARGE_INTEGER * pMappedRuns;
791 
792  ULONG InputSize;
793  ULONG OutputSize;
794 
795  NTSTATUS Status = STATUS_SUCCESS;
796 
797  BOOLEAN FcbResourceAcquired = FALSE;
798 
799  _SEH2_TRY {
800 
801  ASSERT(IrpContext);
802  Irp = IrpContext->Irp;
803  ASSERT(Irp);
804 
805  IrpSp = IoGetCurrentIrpStackLocation(Irp);
806  EIrpSp = (PEXTENDED_IO_STACK_LOCATION)IrpSp;
807  ASSERT(IrpSp);
808 
809  InputSize = EIrpSp->Parameters.FileSystemControl.InputBufferLength;
810  OutputSize = EIrpSp->Parameters.FileSystemControl.OutputBufferLength;
811 
812  ASSERT((IrpContext->Identifier.Type == EXT2ICX) &&
813  (IrpContext->Identifier.Size == sizeof(EXT2_IRP_CONTEXT)));
814 
815  DeviceObject = IrpContext->DeviceObject;
816 
817  DbgBreak();
818 
819  /* This request is not allowed on the main device object */
820  if (IsExt2FsDevice(DeviceObject)) {
821  Status = STATUS_INVALID_DEVICE_REQUEST;
822  _SEH2_LEAVE;
823  }
824 
825  Vcb = (PEXT2_VCB) DeviceObject->DeviceExtension;
826  ASSERT(Vcb != NULL);
827  ASSERT((Vcb->Identifier.Type == EXT2VCB) &&
828  (Vcb->Identifier.Size == sizeof(EXT2_VCB)));
829  ASSERT(IsMounted(Vcb));
830 
831  FileObject = IrpContext->FileObject;
832  Fcb = (PEXT2_FCB) FileObject->FsContext;
833 
834  /* check Fcb is valid or not */
835  if (Fcb == NULL || Fcb->Identifier.Type == EXT2VCB) {
836  Status = STATUS_INVALID_PARAMETER;
837  _SEH2_LEAVE;
838  }
839 
840  ASSERT((Fcb->Identifier.Type == EXT2FCB) &&
841  (Fcb->Identifier.Size == sizeof(EXT2_FCB)));
842  if (IsFlagOn(Fcb->Mcb->Flags, MCB_FILE_DELETED)) {
843  Status = STATUS_FILE_DELETED;
844  _SEH2_LEAVE;
845  }
846 
847  Ccb = (PEXT2_CCB) FileObject->FsContext2;
848  if (Ccb == NULL) {
849  Status = STATUS_INVALID_PARAMETER;
850  _SEH2_LEAVE;
851  }
852 
853  ASSERT((Ccb->Identifier.Type == EXT2CCB) &&
854  (Ccb->Identifier.Size == sizeof(EXT2_CCB)));
855 
856  /* Is requstor in kernel and Fcb a paging file ? */
857  if (Irp->RequestorMode != KernelMode ||
858  !IsFlagOn(Fcb->Flags, FCB_PAGE_FILE) ||
859  InputSize != sizeof(LARGE_INTEGER) ||
860  OutputSize != sizeof(PVOID)) {
861  Status = STATUS_INVALID_PARAMETER;
862  _SEH2_LEAVE;
863  }
864 
865  if (!ExAcquireResourceExclusiveLite (
866  &Fcb->MainResource, Ext2CanIWait())) {
867  Status = STATUS_PENDING;
868  _SEH2_LEAVE;
869  }
870  FcbResourceAcquired = TRUE;
871 
872  RequestVbn = EIrpSp->Parameters.FileSystemControl.Type3InputBuffer;
873  pMappedRuns = Irp->UserBuffer;
874 
875  DbgBreak();
876 
877  /* request size beyonds whole file size */
878  if (RequestVbn->QuadPart >= Fcb->Header.AllocationSize.QuadPart) {
879  Status = STATUS_END_OF_FILE;
880  _SEH2_LEAVE;
881  }
882 
883  Status = Ext2QueryExtentMappings(
884  IrpContext,
885  Vcb,
886  Fcb,
887  RequestVbn,
888  pMappedRuns
889  );
890 
891  } _SEH2_FINALLY {
892 
893  if (FcbResourceAcquired) {
894  ExReleaseResourceLite(&Fcb->MainResource);
895  }
896 
897  if (!_SEH2_AbnormalTermination()) {
898  if (Status == STATUS_PENDING || Status == STATUS_CANT_WAIT) {
899  Status = Ext2QueueRequest(IrpContext);
900  } else {
901  Ext2CompleteIrpContext(IrpContext, Status);
902  }
903  }
904  } _SEH2_END;
905 
906  return Status;
907 }
908 
909 
910 NTSTATUS
911 Ext2GetRetrievalPointers (
912  IN PEXT2_IRP_CONTEXT IrpContext
913 )
914 {
915  PIRP Irp = NULL;
916  PIO_STACK_LOCATION IrpSp;
917  PEXTENDED_IO_STACK_LOCATION EIrpSp;
918 
919  PDEVICE_OBJECT DeviceObject;
920  PFILE_OBJECT FileObject;
921 
922  PEXT2_VCB Vcb = NULL;
923  PEXT2_FCB Fcb = NULL;
924  PEXT2_CCB Ccb = NULL;
925 
926  PSTARTING_VCN_INPUT_BUFFER SVIB;
927  PRETRIEVAL_POINTERS_BUFFER RPSB;
928 
929  PEXT2_EXTENT Chain = NULL;
930  PEXT2_EXTENT Extent = NULL;
931 
932  LONGLONG Vbn = 0;
933  ULONG Length = 0;
934  ULONG i = 0;
935 
936  ULONG UsedSize = 0;
937  ULONG InputSize;
938  ULONG OutputSize;
939 
940  NTSTATUS Status = STATUS_SUCCESS;
941 
942  BOOLEAN FcbResourceAcquired = FALSE;
943 
944  _SEH2_TRY {
945 
946  ASSERT(IrpContext);
947  Irp = IrpContext->Irp;
948  ASSERT(Irp);
949 
950  IrpSp = IoGetCurrentIrpStackLocation(Irp);
951  EIrpSp = (PEXTENDED_IO_STACK_LOCATION)IrpSp;
952  ASSERT(IrpSp);
953 
954  InputSize = EIrpSp->Parameters.FileSystemControl.InputBufferLength;
955  OutputSize = EIrpSp->Parameters.FileSystemControl.OutputBufferLength;
956 
957  ASSERT((IrpContext->Identifier.Type == EXT2ICX) &&
958  (IrpContext->Identifier.Size == sizeof(EXT2_IRP_CONTEXT)));
959 
960  DeviceObject = IrpContext->DeviceObject;
961 
962  /* This request is not allowed on the main device object */
963  if (IsExt2FsDevice(DeviceObject)) {
964  Status = STATUS_INVALID_DEVICE_REQUEST;
965  _SEH2_LEAVE;
966  }
967 
968  Vcb = (PEXT2_VCB) DeviceObject->DeviceExtension;
969  ASSERT(Vcb != NULL);
970  ASSERT((Vcb->Identifier.Type == EXT2VCB) &&
971  (Vcb->Identifier.Size == sizeof(EXT2_VCB)));
972  ASSERT(IsMounted(Vcb));
973 
974  FileObject = IrpContext->FileObject;
975  Fcb = (PEXT2_FCB) FileObject->FsContext;
976 
977  /* check Fcb is valid or not */
978  if (Fcb == NULL || Fcb->Identifier.Type == EXT2VCB) {
979  Status = STATUS_INVALID_PARAMETER;
980  _SEH2_LEAVE;
981  }
982 
983  ASSERT((Fcb->Identifier.Type == EXT2FCB) &&
984  (Fcb->Identifier.Size == sizeof(EXT2_FCB)));
985 
986  if (IsFlagOn(Fcb->Mcb->Flags, MCB_FILE_DELETED)) {
987  Status = STATUS_FILE_DELETED;
988  _SEH2_LEAVE;
989  }
990 
991  Ccb = (PEXT2_CCB) FileObject->FsContext2;
992  if (Ccb == NULL) {
993  Status = STATUS_INVALID_PARAMETER;
994  _SEH2_LEAVE;
995  }
996 
997  ASSERT((Ccb->Identifier.Type == EXT2CCB) &&
998  (Ccb->Identifier.Size == sizeof(EXT2_CCB)));
999 
1000  if (InputSize < sizeof(STARTING_VCN_INPUT_BUFFER) ||
1001  OutputSize < sizeof(RETRIEVAL_POINTERS_BUFFER) ) {
1002  Status = STATUS_BUFFER_TOO_SMALL;
1003  _SEH2_LEAVE;
1004  }
1005 
1006  if (!ExAcquireResourceExclusiveLite (
1007  &Fcb->MainResource, Ext2CanIWait())) {
1008  Status = STATUS_PENDING;
1009  _SEH2_LEAVE;
1010  }
1011  FcbResourceAcquired = TRUE;
1012 
1013  SVIB = (PSTARTING_VCN_INPUT_BUFFER)
1014  EIrpSp->Parameters.FileSystemControl.Type3InputBuffer;
1015  RPSB = (PRETRIEVAL_POINTERS_BUFFER) Ext2GetUserBuffer(Irp);
1016 
1017  /* probe user buffer */
1018 
1019  _SEH2_TRY {
1020  if (Irp->RequestorMode != KernelMode) {
1021  ProbeForRead (SVIB, InputSize, sizeof(UCHAR));
1022  ProbeForWrite(RPSB, OutputSize, sizeof(UCHAR));
1023  }
1024  } _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER) {
1025  Status = STATUS_INVALID_USER_BUFFER;
1026  } _SEH2_END;
1027 
1028  if (!NT_SUCCESS(Status)) {
1029  _SEH2_LEAVE;
1030  }
1031 
1032  UsedSize = FIELD_OFFSET(RETRIEVAL_POINTERS_BUFFER, Extents[0]);
1033 
1034  /* request size beyonds whole file size ? */
1035  DEBUG(DL_DBG, ("Ext2GetRetrievalPointers: Startin from Vbn: %I64xh\n",
1036  SVIB->StartingVcn.QuadPart));
1037  Vbn = (SVIB->StartingVcn.QuadPart << BLOCK_BITS);
1038  if (Vbn >= Fcb->Header.AllocationSize.QuadPart ) {
1039  Status = STATUS_END_OF_FILE;
1040  _SEH2_LEAVE;
1041  }
1042 
1043  /* now building all the request extents */
1044  while (Vbn < Fcb->Header.AllocationSize.QuadPart) {
1045 
1046  ASSERT(Chain == NULL);
1047  Length = 0x80000000; /* 2g bytes */
1048  if (Fcb->Header.AllocationSize.QuadPart < Vbn + Length) {
1049  Length = (ULONG)(Fcb->Header.AllocationSize.QuadPart - Vbn);
1050  }
1051 
1052  /* build extents for sub-range */
1053  Status = Ext2BuildExtents(
1054  IrpContext,
1055  Vcb,
1056  Fcb->Mcb,
1057  Vbn,
1058  Length,
1059  FALSE,
1060  &Chain);
1061 
1062  if (!NT_SUCCESS(Status)) {
1063  DbgBreak();
1064  _SEH2_LEAVE;
1065  }
1066 
1067  /* fill user buffer of RETRIEVAL_POINTERS_BUFFER */
1068  Extent = Chain;
1069  while (Extent) {
1070 
1071  DEBUG(DL_MAP, ("Ext2GetRetrievalPointers: %wZ %d Vbn = %I64xh Lbn = %I64xh\n",
1072  &Fcb->Mcb->FullName, i,
1073  ((Vbn + Extent->Offset) >> BLOCK_BITS),
1074  Extent->Lba));
1075 
1076  RPSB->Extents[i].Lcn.QuadPart = (Extent->Lba >> BLOCK_BITS);
1077  RPSB->Extents[i].NextVcn.QuadPart = ((Vbn + Extent->Offset + Extent->Length) >> BLOCK_BITS);
1078  if (i == 0) {
1079  RPSB->StartingVcn.QuadPart = ((Vbn + Extent->Offset) >> BLOCK_BITS);
1080  } else {
1081  ASSERT(RPSB->Extents[i-1].NextVcn.QuadPart == ((Vbn + Extent->Offset) >> BLOCK_BITS));
1082  }
1083  if (UsedSize + sizeof(RETRIEVAL_POINTERS_BUFFER) > OutputSize) {
1084  Status = STATUS_BUFFER_OVERFLOW;
1085  _SEH2_LEAVE;
1086  }
1087  UsedSize += sizeof(LARGE_INTEGER) * 2;
1088  Irp->IoStatus.Information = (ULONG_PTR)UsedSize;
1089  RPSB->ExtentCount = ++i;
1090  Extent = Extent->Next;
1091  }
1092 
1093  if (Chain) {
1094  Ext2DestroyExtentChain(Chain);
1095  Chain = NULL;
1096  }
1097 
1098  Vbn = Vbn + Length;
1099  }
1100 
1101 #if 0
1102  {
1103  NTSTATUS _s;
1104  ULONG _i = 0;
1105  LARGE_INTEGER RequestVbn = Fcb->Header.AllocationSize;
1106  PLARGE_INTEGER MappedRuns = NULL;
1107 
1108  _s = Ext2QueryExtentMappings(
1109  IrpContext,
1110  Vcb,
1111  Fcb,
1112  &RequestVbn,
1113  &MappedRuns
1114  );
1115  if (!NT_SUCCESS(_s) || NULL == MappedRuns) {
1116  DbgBreak();
1117  goto exit_to_get_rps;
1118  }
1119 
1120  while (MappedRuns[_i*2 + 0].QuadPart != 0 ||
1121  MappedRuns[_i*2 + 1].QuadPart != 0 ) {
1122  DEBUG(DL_MAP, ("Ext2QueryExtentMappings: %wZ %d Vbn = %I64xh Lbn = %I64xh\n",
1123  &Fcb->Mcb->FullName, _i,
1124  MappedRuns[_i*2 + 0].QuadPart,
1125  MappedRuns[_i*2 + 1].QuadPart));
1126  _i++;
1127  }
1128 
1129 exit_to_get_rps:
1130 
1131  if (MappedRuns) {
1132  Ext2FreePool(MappedRuns, 'RE2E');
1133  }
1134  }
1135 #endif
1136 
1137  } _SEH2_FINALLY {
1138 
1139  if (FcbResourceAcquired) {
1140  ExReleaseResourceLite(&Fcb->MainResource);
1141  }
1142 
1143  if (Chain) {
1144  Ext2DestroyExtentChain(Chain);
1145  }
1146 
1147  if (!_SEH2_AbnormalTermination()) {
1148  if (Status == STATUS_PENDING || Status == STATUS_CANT_WAIT) {
1149  Status = Ext2QueueRequest(IrpContext);
1150  } else {
1151  Ext2CompleteIrpContext(IrpContext, Status);
1152  }
1153  }
1154  } _SEH2_END;
1155 
1156  return Status;
1157 }
1158 
1159 NTSTATUS
1160 Ext2GetRetrievalPointerBase (
1161  IN PEXT2_IRP_CONTEXT IrpContext
1162 )
1163 {
1164  PIRP Irp = NULL;
1165  PIO_STACK_LOCATION IrpSp;
1166  PEXTENDED_IO_STACK_LOCATION EIrpSp;
1167 
1168  PDEVICE_OBJECT DeviceObject;
1169  PFILE_OBJECT FileObject;
1170 
1171  PEXT2_VCB Vcb = NULL;
1172  PEXT2_FCB Fcb = NULL;
1173  PEXT2_CCB Ccb = NULL;
1174 
1175  PLARGE_INTEGER FileAreaOffset;
1176 
1177  ULONG OutputSize;
1178 
1179  NTSTATUS Status = STATUS_SUCCESS;
1180 
1181  BOOLEAN FcbResourceAcquired = FALSE;
1182 
1183  _SEH2_TRY {
1184 
1185  ASSERT(IrpContext);
1186  Irp = IrpContext->Irp;
1187  ASSERT(Irp);
1188 
1189  IrpSp = IoGetCurrentIrpStackLocation(Irp);
1190  EIrpSp = (PEXTENDED_IO_STACK_LOCATION)IrpSp;
1191  ASSERT(IrpSp);
1192 
1193  OutputSize = EIrpSp->Parameters.FileSystemControl.OutputBufferLength;
1194 
1195  ASSERT((IrpContext->Identifier.Type == EXT2ICX) &&
1196  (IrpContext->Identifier.Size == sizeof(EXT2_IRP_CONTEXT)));
1197 
1198  DeviceObject = IrpContext->DeviceObject;
1199 
1200  /* This request is not allowed on the main device object */
1201  if (IsExt2FsDevice(DeviceObject)) {
1202  Status = STATUS_INVALID_DEVICE_REQUEST;
1203  _SEH2_LEAVE;
1204  }
1205 
1206  Vcb = (PEXT2_VCB) DeviceObject->DeviceExtension;
1207  ASSERT(Vcb != NULL);
1208  ASSERT((Vcb->Identifier.Type == EXT2VCB) &&
1209  (Vcb->Identifier.Size == sizeof(EXT2_VCB)));
1210  ASSERT(IsMounted(Vcb));
1211 
1212  FileObject = IrpContext->FileObject;
1213  Fcb = (PEXT2_FCB) FileObject->FsContext;
1214 
1215  /* check Fcb is valid or not */
1216  if (Fcb == NULL || Fcb->Identifier.Type == EXT2VCB) {
1217  Status = STATUS_INVALID_PARAMETER;
1218  _SEH2_LEAVE;
1219  }
1220 
1221  ASSERT((Fcb->Identifier.Type == EXT2FCB) &&
1222  (Fcb->Identifier.Size == sizeof(EXT2_FCB)));
1223 
1224  if (IsFlagOn(Fcb->Mcb->Flags, MCB_FILE_DELETED)) {
1225  Status = STATUS_FILE_DELETED;
1226  _SEH2_LEAVE;
1227  }
1228 
1229  Ccb = (PEXT2_CCB) FileObject->FsContext2;
1230  if (Ccb == NULL) {
1231  Status = STATUS_INVALID_PARAMETER;
1232  _SEH2_LEAVE;
1233  }
1234 
1235  ASSERT((Ccb->Identifier.Type == EXT2CCB) &&
1236  (Ccb->Identifier.Size == sizeof(EXT2_CCB)));
1237 
1238  if (OutputSize < sizeof(LARGE_INTEGER)) {
1239  Status = STATUS_BUFFER_TOO_SMALL;
1240  _SEH2_LEAVE;
1241  }
1242 
1243  if (!ExAcquireResourceExclusiveLite (
1244  &Fcb->MainResource, Ext2CanIWait())) {
1245  Status = STATUS_PENDING;
1246  _SEH2_LEAVE;
1247  }
1248  FcbResourceAcquired = TRUE;
1249 
1250  FileAreaOffset = (PLARGE_INTEGER) Ext2GetUserBuffer(Irp);
1251 
1252  /* probe user buffer */
1253 
1254  _SEH2_TRY {
1255  if (Irp->RequestorMode != KernelMode) {
1256  ProbeForWrite(FileAreaOffset, OutputSize, sizeof(UCHAR));
1257  }
1258 
1259  } _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER) {
1260 
1261  Status = STATUS_INVALID_USER_BUFFER;
1262  } _SEH2_END;
1263 
1264  if (!NT_SUCCESS(Status)) {
1265  _SEH2_LEAVE;
1266  }
1267 
1268  DEBUG(DL_DBG, ("Ext2GetRetrievalPointerBase: FileAreaOffset is 0.\n"));
1269 
1270  FileAreaOffset->QuadPart = 0; // sector offset to the first allocatable unit on the filesystem
1271 
1272  Irp->IoStatus.Information = sizeof(LARGE_INTEGER);
1273 
1274  } _SEH2_FINALLY {
1275 
1276  if (FcbResourceAcquired) {
1277  ExReleaseResourceLite(&Fcb->MainResource);
1278  }
1279 
1280  if (!_SEH2_AbnormalTermination()) {
1281  if (Status == STATUS_PENDING || Status == STATUS_CANT_WAIT) {
1282  Status = Ext2QueueRequest(IrpContext);
1283  } else {
1284  Ext2CompleteIrpContext(IrpContext, Status);
1285  }
1286  }
1287  } _SEH2_END;
1288 
1289  return Status;
1290 }
1291 
1292 NTSTATUS
1293 Ext2InspectReparseData(
1294  IN PREPARSE_DATA_BUFFER RDB,
1295  IN ULONG InputBufferLength
1296 )
1297 {
1298  NTSTATUS Status = STATUS_SUCCESS;
1299 
1300  if (!RDB) {
1301  Status = STATUS_INVALID_PARAMETER;
1302  goto out;
1303  }
1304 
1305  if (InputBufferLength < sizeof(REPARSE_DATA_BUFFER)) {
1306  Status = STATUS_BUFFER_OVERFLOW;
1307  goto out;
1308  }
1309 
1310  if (InputBufferLength < RDB->ReparseDataLength) {
1311  Status = STATUS_BUFFER_OVERFLOW;
1312  goto out;
1313  }
1314 
1315  if (RDB->ReparseTag != IO_REPARSE_TAG_SYMLINK) {
1316  Status = STATUS_NOT_IMPLEMENTED;
1317  goto out;
1318  }
1319 
1320  if ((PUCHAR)RDB->SymbolicLinkReparseBuffer.PathBuffer
1321  + RDB->SymbolicLinkReparseBuffer.SubstituteNameOffset
1322  + RDB->SymbolicLinkReparseBuffer.SubstituteNameLength
1323  > (PUCHAR)RDB + InputBufferLength ) {
1324  Status = STATUS_BUFFER_OVERFLOW;
1325  goto out;
1326  }
1327 
1328  if ((PUCHAR)RDB->SymbolicLinkReparseBuffer.PathBuffer
1329  + RDB->SymbolicLinkReparseBuffer.PrintNameOffset
1330  + RDB->SymbolicLinkReparseBuffer.PrintNameLength
1331  > (PUCHAR)RDB + InputBufferLength) {
1332  Status = STATUS_BUFFER_OVERFLOW;
1333  goto out;
1334  }
1335 
1336  if (RDB->SymbolicLinkReparseBuffer.Flags != SYMLINK_FLAG_RELATIVE) {
1337  Status = STATUS_NOT_IMPLEMENTED;
1338  goto out;
1339  }
1340 
1341 out:
1342  return Status;
1343 }
1344 
1345 VOID
1346 Ext2InitializeReparseData(IN PREPARSE_DATA_BUFFER RDB, USHORT PathBufferLength)
1347 {
1348  ASSERT(FIELD_OFFSET(REPARSE_DATA_BUFFER, SymbolicLinkReparseBuffer.SubstituteNameOffset) ==
1349  REPARSE_DATA_BUFFER_HEADER_SIZE);
1350  RDB->ReparseTag = IO_REPARSE_TAG_SYMLINK;
1351  RDB->ReparseDataLength = FIELD_OFFSET(REPARSE_DATA_BUFFER, SymbolicLinkReparseBuffer.PathBuffer) -
1352  FIELD_OFFSET(REPARSE_DATA_BUFFER, GenericReparseBuffer.DataBuffer) +
1353  PathBufferLength * sizeof(WCHAR);
1354  RDB->Reserved = 0;
1355  RDB->SymbolicLinkReparseBuffer.SubstituteNameOffset = PathBufferLength;
1356  RDB->SymbolicLinkReparseBuffer.SubstituteNameLength = PathBufferLength;
1357  RDB->SymbolicLinkReparseBuffer.PrintNameOffset = 0;
1358  RDB->SymbolicLinkReparseBuffer.PrintNameLength = PathBufferLength;
1359  RDB->SymbolicLinkReparseBuffer.Flags = SYMLINK_FLAG_RELATIVE;
1360  RtlZeroMemory(&RDB->SymbolicLinkReparseBuffer.PathBuffer, PathBufferLength * 2);
1361 }
1362 
1363 NTSTATUS
1364 Ext2ReadSymlink (
1365  IN PEXT2_IRP_CONTEXT IrpContext,
1366  IN PEXT2_VCB Vcb,
1367  IN PEXT2_MCB Mcb,
1368  IN PVOID Buffer,
1369  IN ULONG Size,
1370  OUT PULONG BytesRead
1371  )
1372 {
1373  return Ext2ReadInode ( IrpContext,
1374  Vcb,
1375  Mcb,
1376  0,
1377  Buffer,
1378  Size,
1379  FALSE,
1380  BytesRead);
1381 }
1382 
1383 
1384 
1385 NTSTATUS
1386 Ext2GetReparsePoint (IN PEXT2_IRP_CONTEXT IrpContext)
1387 {
1388  PIRP Irp = NULL;
1389  PIO_STACK_LOCATION IrpSp;
1390  PEXTENDED_IO_STACK_LOCATION EIrpSp;
1391 
1392  PDEVICE_OBJECT DeviceObject;
1393 
1394  PEXT2_VCB Vcb = NULL;
1395  PEXT2_CCB Ccb = NULL;
1396  PEXT2_MCB Mcb = NULL;
1397 
1398  NTSTATUS Status = STATUS_UNSUCCESSFUL;
1399  BOOLEAN MainResourceAcquired = FALSE;
1400 
1401  PVOID OutputBuffer;
1402  ULONG OutputBufferLength;
1403  ULONG BytesRead = 0;
1404 
1405  PREPARSE_DATA_BUFFER RDB;
1406 
1407  UNICODE_STRING UniName;
1408  OEM_STRING OemName;
1409 
1410  PCHAR OemNameBuffer = NULL;
1411  int OemNameLength = 0, i;
1412 
1413  Ccb = IrpContext->Ccb;
1414  ASSERT(Ccb != NULL);
1415  ASSERT((Ccb->Identifier.Type == EXT2CCB) &&
1416  (Ccb->Identifier.Size == sizeof(EXT2_CCB)));
1417  DeviceObject = IrpContext->DeviceObject;
1418  Vcb = (PEXT2_VCB) DeviceObject->DeviceExtension;
1419  Mcb = IrpContext->Fcb->Mcb;
1420  Irp = IrpContext->Irp;
1421  IrpSp = IoGetCurrentIrpStackLocation(Irp);
1422 
1423  _SEH2_TRY {
1424 
1425  if (!Mcb || !IsInodeSymLink(&Mcb->Inode) ||
1426  !IsFlagOn(Ccb->Flags, CCB_OPEN_REPARSE_POINT)) {
1427  Status = STATUS_NOT_A_REPARSE_POINT;
1428  _SEH2_LEAVE;
1429  }
1430 
1431  OutputBuffer = (PVOID)Irp->AssociatedIrp.SystemBuffer;
1432  OutputBufferLength = IrpSp->Parameters.FileSystemControl.OutputBufferLength;
1433 
1434  RDB = (PREPARSE_DATA_BUFFER)OutputBuffer;
1435  if (!RDB) {
1436  Status = STATUS_INVALID_PARAMETER;
1437  _SEH2_LEAVE;
1438  }
1439  if (OutputBufferLength < sizeof(REPARSE_DATA_BUFFER)) {
1440  Status = STATUS_BUFFER_OVERFLOW;
1441  _SEH2_LEAVE;
1442  }
1443 
1444  OemNameLength = (ULONG)Mcb->Inode.i_size;
1445  if (OemNameLength > USHRT_MAX) {
1446  Status = STATUS_INVALID_PARAMETER;
1447  _SEH2_LEAVE;
1448  }
1449  OemName.Length = (USHORT)OemNameLength;
1450  OemName.MaximumLength = OemNameLength + 1;
1451  OemNameBuffer = OemName.Buffer = Ext2AllocatePool(NonPagedPool,
1452  OemName.MaximumLength,
1453  'NL2E');
1454  if (!OemNameBuffer) {
1455  Status = STATUS_INSUFFICIENT_RESOURCES;
1456  _SEH2_LEAVE;
1457  }
1458 
1459  Status = Ext2ReadSymlink(IrpContext,
1460  Vcb,
1461  Mcb,
1462  OemNameBuffer,
1463  OemNameLength,
1464  &BytesRead
1465  );
1466  OemName.Buffer[OemName.Length] = '\0';
1467  for (i = 0;i < OemName.Length;i++) {
1468  if (OemName.Buffer[i] == '/') {
1469  OemName.Buffer[i] = '\\';
1470  }
1471  }
1472 
1473  if (OutputBufferLength - FIELD_OFFSET(REPARSE_DATA_BUFFER, SymbolicLinkReparseBuffer.PathBuffer) > USHRT_MAX) {
1474  UniName.Length = USHRT_MAX;
1475  } else {
1476  UniName.Length = (USHORT)OutputBufferLength - FIELD_OFFSET(REPARSE_DATA_BUFFER, SymbolicLinkReparseBuffer.PathBuffer);
1477  }
1478  UniName.MaximumLength = UniName.Length;
1479  UniName.Length = (USHORT)Ext2OEMToUnicodeSize(Vcb, &OemName);
1480  Irp->IoStatus.Information = FIELD_OFFSET(REPARSE_DATA_BUFFER, SymbolicLinkReparseBuffer.PathBuffer) + 2 * UniName.Length;
1481  if (UniName.MaximumLength < 2*UniName.Length) {
1482  Status = STATUS_BUFFER_TOO_SMALL;
1483  _SEH2_LEAVE;
1484  }
1485 
1486  Ext2InitializeReparseData(RDB, UniName.Length);
1487  UniName.Buffer = RDB->SymbolicLinkReparseBuffer.PathBuffer;
1488  /*
1489  (PWCHAR)((PUCHAR)&
1490  + RDB->SymbolicLinkReparseBuffer.SubstituteNameOffset);
1491  */
1492  Ext2OEMToUnicode(Vcb, &UniName, &OemName);
1493  RtlMoveMemory( (PUCHAR)RDB->SymbolicLinkReparseBuffer.PathBuffer +
1494  RDB->SymbolicLinkReparseBuffer.SubstituteNameOffset,
1495  UniName.Buffer, UniName.Length);
1496 
1497  Status = STATUS_SUCCESS;
1498 
1499  } _SEH2_FINALLY {
1500 
1501  if (OemNameBuffer) {
1502  Ext2FreePool(OemNameBuffer, 'NL2E');
1503  }
1504 
1505  if (!_SEH2_AbnormalTermination()) {
1506  if (Status == STATUS_PENDING || Status == STATUS_CANT_WAIT) {
1507  Status = Ext2QueueRequest(IrpContext);
1508  } else {
1509  Ext2CompleteIrpContext(IrpContext, Status);
1510  }
1511  }
1512  } _SEH2_END;
1513 
1514  return Status;
1515 }
1516 
1517 
1518 NTSTATUS
1519 Ext2WriteSymlink (
1520  IN PEXT2_IRP_CONTEXT IrpContext,
1521  IN PEXT2_VCB Vcb,
1522  IN PEXT2_MCB Mcb,
1523  IN PVOID Buffer,
1524  IN ULONG Size,
1525  OUT PULONG BytesWritten
1526 )
1527 {
1528  NTSTATUS Status = STATUS_SUCCESS;
1529  PUCHAR Data = (PUCHAR)(&Mcb->Inode.i_block[0]);
1530 
1531  if (Size >= EXT2_LINKLEN_IN_INODE) {
1532 
1533  /* initialize inode i_block[] */
1534  if (0 == Mcb->Inode.i_blocks) {
1535  memset(Data, 0, EXT2_LINKLEN_IN_INODE);
1536  ClearFlag(Mcb->Inode.i_flags, EXT4_EXTENTS_FL);
1537  Ext2SaveInode(IrpContext, Vcb, &Mcb->Inode);
1538  }
1539 
1540  Status = Ext2WriteInode(IrpContext, Vcb, Mcb,
1541  0, Buffer, Size,
1542  FALSE, BytesWritten);
1543  if (!NT_SUCCESS(Status)) {
1544  goto out;
1545  }
1546 
1547  } else {
1548 
1549  /* free inode blocks before writing in line */
1550  if (Mcb->Inode.i_blocks) {
1551  LARGE_INTEGER Zero = {0, 0};
1552  Ext2TruncateFile(IrpContext, Vcb, Mcb, &Zero);
1553  }
1554 
1555  ClearFlag(Mcb->Inode.i_flags, EXT4_EXTENTS_FL);
1556  memset(Data, 0, EXT2_LINKLEN_IN_INODE);
1557  RtlCopyMemory(Data, Buffer, Size);
1558  }
1559 
1560  Mcb->Inode.i_size = Size;
1561  Ext2SaveInode(IrpContext, Vcb, &Mcb->Inode);
1562 
1563  if (BytesWritten) {
1564  *BytesWritten = Size;
1565  }
1566 
1567 out:
1568  return Status;
1569 }
1570 
1571 NTSTATUS
1572 Ext2SetReparsePoint (IN PEXT2_IRP_CONTEXT IrpContext)
1573 {
1574  PIRP Irp = NULL;
1575  PIO_STACK_LOCATION IrpSp;
1576 
1577  PDEVICE_OBJECT DeviceObject;
1578 
1579  PEXT2_VCB Vcb = NULL;
1580  PEXT2_FCB Fcb = NULL;
1581  PEXT2_CCB Ccb = NULL;
1582  PEXT2_MCB Mcb = NULL;
1583 
1584  NTSTATUS Status = STATUS_UNSUCCESSFUL;
1585 
1586  PVOID InputBuffer;
1587  ULONG InputBufferLength;
1588  ULONG BytesWritten = 0;
1589 
1590  PEXT2_FCB ParentDcb = NULL; /* Dcb of it's current parent */
1591  PEXT2_MCB ParentMcb = NULL;
1592 
1593  PREPARSE_DATA_BUFFER RDB;
1594 
1595  UNICODE_STRING UniName;
1596  OEM_STRING OemName;
1597 
1598  PCHAR OemNameBuffer = NULL;
1599  int OemNameLength = 0, i;
1600 
1601  BOOLEAN MainResourceAcquired = FALSE;
1602  BOOLEAN FcbLockAcquired = FALSE;
1603 
1604  _SEH2_TRY {
1605 
1606  Ccb = IrpContext->Ccb;
1607  ASSERT(Ccb != NULL);
1608  ASSERT((Ccb->Identifier.Type == EXT2CCB) &&
1609  (Ccb->Identifier.Size == sizeof(EXT2_CCB)));
1610  DeviceObject = IrpContext->DeviceObject;
1611  Vcb = (PEXT2_VCB) DeviceObject->DeviceExtension;
1612  Fcb = IrpContext->Fcb;
1613  Mcb = Fcb->Mcb;
1614  Irp = IrpContext->Irp;
1615  IrpSp = IoGetCurrentIrpStackLocation(Irp);
1616 
1617  ExAcquireResourceExclusiveLite(&Vcb->FcbLock, TRUE);
1618  FcbLockAcquired = TRUE;
1619 
1620  ParentMcb = Mcb->Parent;
1621  ParentDcb = ParentMcb->Fcb;
1622  if (ParentDcb == NULL) {
1623  ParentDcb = Ext2AllocateFcb(Vcb, ParentMcb);
1624  }
1625  if (ParentDcb) {
1626  Ext2ReferXcb(&ParentDcb->ReferenceCount);
1627  }
1628 
1629  if (!Mcb)
1630  _SEH2_LEAVE;
1631 
1632  if (FcbLockAcquired) {
1633  ExReleaseResourceLite(&Vcb->FcbLock);
1634  FcbLockAcquired = FALSE;
1635  }
1636 
1637  if (!ExAcquireResourceSharedLite(
1638  &Fcb->MainResource,
1639  IsFlagOn(IrpContext->Flags, IRP_CONTEXT_FLAG_WAIT) )) {
1640  Status = STATUS_PENDING;
1641  _SEH2_LEAVE;
1642  }
1643  MainResourceAcquired = TRUE;
1644 
1645  InputBuffer = Irp->AssociatedIrp.SystemBuffer;
1646  InputBufferLength = IrpSp->Parameters.FileSystemControl.InputBufferLength;
1647 
1648  RDB = (PREPARSE_DATA_BUFFER)InputBuffer;
1649  Status = Ext2InspectReparseData(RDB, InputBufferLength);
1650  if (!NT_SUCCESS(Status)) {
1651  _SEH2_LEAVE;
1652  }
1653 
1654  UniName.Length = RDB->SymbolicLinkReparseBuffer.SubstituteNameLength;
1655  UniName.MaximumLength = UniName.Length;
1656  UniName.Buffer =
1657  (PWCHAR)((PUCHAR)&RDB->SymbolicLinkReparseBuffer.PathBuffer
1658  + RDB->SymbolicLinkReparseBuffer.SubstituteNameOffset);
1659 
1660  OemNameLength = Ext2UnicodeToOEMSize(Vcb, &UniName);
1661  if (OemNameLength > USHRT_MAX) {
1662  Status = STATUS_INVALID_PARAMETER;
1663  _SEH2_LEAVE;
1664  }
1665  OemName.Length = (USHORT)OemNameLength;
1666  OemName.MaximumLength = OemNameLength + 1;
1667  OemNameBuffer = OemName.Buffer = Ext2AllocatePool(PagedPool,
1668  OemName.MaximumLength,
1669  'NL2E');
1670  if (!OemNameBuffer) {
1671  Status = STATUS_INSUFFICIENT_RESOURCES;
1672  _SEH2_LEAVE;
1673  }
1674 
1675  Ext2UnicodeToOEM(Vcb, &OemName, &UniName);
1676  OemName.Buffer[OemName.Length] = '\0';
1677  for (i = 0;i < OemName.Length;i++) {
1678  if (OemName.Buffer[i] == '\\') {
1679  OemName.Buffer[i] = '/';
1680  }
1681  }
1682 
1683  /* free all data blocks of the inode (to be set as symlink) */
1684  {
1685  LARGE_INTEGER zero = {0};
1686  Status = Ext2TruncateFile(IrpContext, Vcb, Mcb, &zero);
1687  }
1688 
1689  /* decrease dir count of group desc and vcb stat */
1690  if (S_ISDIR(Mcb->Inode.i_mode)) {
1691 
1692  ULONG group = (Mcb->Inode.i_ino - 1) / INODES_PER_GROUP;
1693  Ext2UpdateGroupDirStat(IrpContext, Vcb, group);
1694 
1695  /* drop extra reference for dir inode */
1696  ext3_dec_count(&Mcb->Inode);
1697  }
1698 
1699  /* overwrite inode mode as type SYMLINK */
1700  Ext2SaveInode(IrpContext, Vcb, &Mcb->Inode);
1701  SetFlag(Mcb->FileAttr, FILE_ATTRIBUTE_REPARSE_POINT);
1702 
1703  Status = Ext2WriteSymlink(IrpContext, Vcb, Mcb, OemNameBuffer,
1704  OemNameLength, &BytesWritten);
1705  if (NT_SUCCESS(Status)) {
1706  Ext2SetFileType(IrpContext, Vcb, ParentDcb, Mcb,
1707  S_IFLNK | S_IRWXUGO);
1708  }
1709 
1710  } _SEH2_FINALLY {
1711 
1712  if (FcbLockAcquired) {
1713  ExReleaseResourceLite(&Vcb->FcbLock);
1714  FcbLockAcquired = FALSE;
1715  }
1716 
1717  if (MainResourceAcquired) {
1718  ExReleaseResourceLite(&Fcb->MainResource);
1719  }
1720 
1721  if (OemNameBuffer) {
1722  Ext2FreePool(OemNameBuffer, 'NL2E');
1723  }
1724 
1725  if (NT_SUCCESS(Status)) {
1726  Ext2NotifyReportChange(
1727  IrpContext,
1728  Vcb,
1729  Mcb,
1730  FILE_NOTIFY_CHANGE_ATTRIBUTES,
1731  FILE_ACTION_MODIFIED );
1732  }
1733 
1734  if (!_SEH2_AbnormalTermination()) {
1735  if (Status == STATUS_PENDING || Status == STATUS_CANT_WAIT) {
1736  Status = Ext2QueueRequest(IrpContext);
1737  } else {
1738  Ext2CompleteIrpContext(IrpContext, Status);
1739  }
1740  }
1741 
1742  if (ParentDcb) {
1743  Ext2ReleaseFcb(ParentDcb);
1744  }
1745  } _SEH2_END;
1746 
1747  return Status;
1748 }
1749 
1750 NTSTATUS
1751 Ext2TruncateSymlink(
1752  PEXT2_IRP_CONTEXT IrpContext,
1753  PEXT2_VCB Vcb,
1754  PEXT2_MCB Mcb,
1755  ULONG Size
1756  )
1757 {
1758  NTSTATUS status = STATUS_SUCCESS;
1759  PUCHAR data = (PUCHAR)&Mcb->Inode.i_block;
1760  ULONG len = (ULONG)Mcb->Inode.i_size;
1761  LARGE_INTEGER NewSize;
1762 
1763  if (len < EXT2_LINKLEN_IN_INODE && !Mcb->Inode.i_blocks) {
1764 
1765  RtlZeroMemory(data + Size, EXT2_LINKLEN_IN_INODE - Size);
1766  Mcb->Inode.i_size = Size;
1767  Ext2SaveInode(IrpContext, Vcb, &Mcb->Inode);
1768 
1769  } else {
1770  NewSize.QuadPart = Size;
1771  status = Ext2TruncateFile(IrpContext, Vcb, Mcb, &NewSize);
1772  if (!NT_SUCCESS(status)) {
1773  goto out;
1774  }
1775  }
1776 
1777 out:
1778  return status;
1779 }
1780 
1781 
1782 /* FIXME: We can only handle one reparse point right now. */
1783 NTSTATUS
1784 Ext2DeleteReparsePoint (IN PEXT2_IRP_CONTEXT IrpContext)
1785 {
1786  PIRP Irp = NULL;
1787 
1788  PDEVICE_OBJECT DeviceObject;
1789 
1790  PEXT2_VCB Vcb = NULL;
1791  PEXT2_FCB Fcb = NULL;
1792  PEXT2_CCB Ccb = NULL;
1793  PEXT2_MCB Mcb = NULL;
1794 
1795  PEXT2_FCB ParentDcb = NULL; /* Dcb of it's current parent */
1796  PEXT2_MCB ParentMcb = NULL;
1797 
1798  NTSTATUS Status = STATUS_UNSUCCESSFUL;
1799 
1800  BOOLEAN FcbLockAcquired = FALSE;
1801  BOOLEAN MainResourceAcquired = FALSE;
1802 
1803 
1804  _SEH2_TRY {
1805 
1806  Ccb = IrpContext->Ccb;
1807  ASSERT(Ccb != NULL);
1808  ASSERT((Ccb->Identifier.Type == EXT2CCB) &&
1809  (Ccb->Identifier.Size == sizeof(EXT2_CCB)));
1810  DeviceObject = IrpContext->DeviceObject;
1811  Vcb = (PEXT2_VCB) DeviceObject->DeviceExtension;
1812  Mcb = IrpContext->Fcb->Mcb;
1813  Irp = IrpContext->Irp;
1814 
1815  ExAcquireResourceExclusiveLite(&Vcb->FcbLock, TRUE);
1816  FcbLockAcquired = TRUE;
1817 
1818  ParentMcb = Mcb->Parent;
1819  ParentDcb = ParentMcb->Fcb;
1820  if (ParentDcb == NULL) {
1821  ParentDcb = Ext2AllocateFcb(Vcb, ParentMcb);
1822  }
1823  if (ParentDcb) {
1824  Ext2ReferXcb(&ParentDcb->ReferenceCount);
1825  }
1826 
1827  if (!Mcb || !IsInodeSymLink(&Mcb->Inode) ||
1828  !IsFlagOn(Ccb->Flags, CCB_OPEN_REPARSE_POINT)) {
1829  Status = STATUS_NOT_A_REPARSE_POINT;
1830  _SEH2_LEAVE;
1831  }
1832 
1833  Fcb = Ext2AllocateFcb (Vcb, Mcb);
1834  if (Fcb) {
1835  Ext2ReferXcb(&Fcb->ReferenceCount);
1836  } else {
1837  Status = STATUS_INSUFFICIENT_RESOURCES;
1838  _SEH2_LEAVE;
1839  }
1840 
1841  if (FcbLockAcquired) {
1842  ExReleaseResourceLite(&Vcb->FcbLock);
1843  FcbLockAcquired = FALSE;
1844  }
1845 
1846  if (!ExAcquireResourceSharedLite(
1847  &Fcb->MainResource,
1848  IsFlagOn(IrpContext->Flags, IRP_CONTEXT_FLAG_WAIT) )) {
1849  Status = STATUS_PENDING;
1850  _SEH2_LEAVE;
1851  }
1852  MainResourceAcquired = TRUE;
1853 
1854  Status = Ext2TruncateSymlink(IrpContext, Vcb, Mcb, 0);
1855  if (!NT_SUCCESS(Status)) {
1856  _SEH2_LEAVE;
1857  }
1858 
1859  /* inode is to be removed */
1860  SetFlag(Ccb->Flags, CCB_DELETE_ON_CLOSE);
1861 
1862  } _SEH2_FINALLY {
1863 
1864  if (FcbLockAcquired) {
1865  ExReleaseResourceLite(&Vcb->FcbLock);
1866  }
1867 
1868  if (MainResourceAcquired) {
1869  ExReleaseResourceLite(&Fcb->MainResource);
1870  }
1871 
1872  if (NT_SUCCESS(Status)) {
1873  Ext2NotifyReportChange(
1874  IrpContext,
1875  Vcb,
1876  Mcb,
1877  FILE_NOTIFY_CHANGE_ATTRIBUTES,
1878  FILE_ACTION_MODIFIED );
1879 
1880  }
1881 
1882  if (!_SEH2_AbnormalTermination()) {
1883  if (Status == STATUS_PENDING || Status == STATUS_CANT_WAIT) {
1884  Status = Ext2QueueRequest(IrpContext);
1885  } else {
1886  Ext2CompleteIrpContext(IrpContext, Status);
1887  }
1888  }
1889 
1890  if (ParentDcb) {
1891  Ext2ReleaseFcb(ParentDcb);
1892  }
1893 
1894  if (Fcb) {
1895  Ext2ReleaseFcb(Fcb);
1896  }
1897  } _SEH2_END;
1898 
1899  return Status;
1900 }
1901 
1902 NTSTATUS
1903 Ext2UserFsRequest (IN PEXT2_IRP_CONTEXT IrpContext)
1904 {
1905  PIRP Irp;
1906  PIO_STACK_LOCATION IoStackLocation;
1907  ULONG FsControlCode;
1908  NTSTATUS Status;
1909 
1910  ASSERT(IrpContext);
1911 
1912  ASSERT((IrpContext->Identifier.Type == EXT2ICX) &&
1913  (IrpContext->Identifier.Size == sizeof(EXT2_IRP_CONTEXT)));
1914 
1915  Irp = IrpContext->Irp;
1916  IoStackLocation = IoGetCurrentIrpStackLocation(Irp);
1917 
1918 #ifndef _GNU_NTIFS_
1919  FsControlCode =
1920  IoStackLocation->Parameters.FileSystemControl.FsControlCode;
1921 #else
1922  FsControlCode = ((PEXTENDED_IO_STACK_LOCATION)
1923  IoStackLocation)->Parameters.FileSystemControl.FsControlCode;
1924 #endif
1925 
1926  switch (FsControlCode) {
1927 
1928  case FSCTL_GET_REPARSE_POINT:
1929  Status = Ext2GetReparsePoint(IrpContext);
1930  break;
1931 
1932  case FSCTL_SET_REPARSE_POINT:
1933  Status = Ext2SetReparsePoint(IrpContext);
1934  break;
1935 
1936  case FSCTL_DELETE_REPARSE_POINT:
1937  Status = Ext2DeleteReparsePoint(IrpContext);
1938  break;
1939 
1940  case FSCTL_LOCK_VOLUME:
1941  Status = Ext2LockVolume(IrpContext);
1942  break;
1943 
1944  case FSCTL_UNLOCK_VOLUME:
1945  Status = Ext2UnlockVolume(IrpContext);
1946  break;
1947 
1948  case FSCTL_DISMOUNT_VOLUME:
1949  Status = Ext2DismountVolume(IrpContext);
1950  break;
1951 
1952  case FSCTL_IS_VOLUME_MOUNTED:
1953  Status = Ext2IsVolumeMounted(IrpContext);
1954  break;
1955 
1956  case FSCTL_INVALIDATE_VOLUMES:
1957  Status = Ext2InvalidateVolumes(IrpContext);
1958  break;
1959 
1960 #if (_WIN32_WINNT >= 0x0500)
1961  case FSCTL_ALLOW_EXTENDED_DASD_IO:
1962  Status = Ext2AllowExtendedDasdIo(IrpContext);
1963  break;
1964 #endif //(_WIN32_WINNT >= 0x0500)
1965 
1966  case FSCTL_REQUEST_OPLOCK_LEVEL_1:
1967  case FSCTL_REQUEST_OPLOCK_LEVEL_2:
1968  case FSCTL_REQUEST_BATCH_OPLOCK:
1969  case FSCTL_OPLOCK_BREAK_ACKNOWLEDGE:
1970  case FSCTL_OPBATCH_ACK_CLOSE_PENDING:
1971  case FSCTL_OPLOCK_BREAK_NOTIFY:
1972  case FSCTL_OPLOCK_BREAK_ACK_NO_2:
1973 
1974  Status = Ext2OplockRequest(IrpContext);
1975  break;
1976 
1977  case FSCTL_IS_VOLUME_DIRTY:
1978  Status = Ext2IsVolumeDirty(IrpContext);
1979  break;
1980 
1981  case FSCTL_QUERY_RETRIEVAL_POINTERS:
1982  Status = Ext2QueryRetrievalPointers(IrpContext);
1983  break;
1984 
1985  case FSCTL_GET_RETRIEVAL_POINTERS:
1986  Status = Ext2GetRetrievalPointers(IrpContext);
1987  break;
1988 
1989  case FSCTL_GET_RETRIEVAL_POINTER_BASE:
1990  Status = Ext2GetRetrievalPointerBase(IrpContext);
1991  break;
1992 
1993  default:
1994 
1995  DEBUG(DL_INF, ( "Ext2UserFsRequest: Invalid User Request: %xh.\n", FsControlCode));
1996  Status = STATUS_INVALID_DEVICE_REQUEST;
1997 
1998  Ext2CompleteIrpContext(IrpContext, Status);
1999  }
2000 
2001  return Status;
2002 }
2003 
2004 BOOLEAN
2005 Ext2IsMediaWriteProtected (
2006  IN PEXT2_IRP_CONTEXT IrpContext,
2007  IN PDEVICE_OBJECT TargetDevice
2008 )
2009 {
2010  PIRP Irp;
2011  KEVENT Event;
2012  NTSTATUS Status;
2013  IO_STATUS_BLOCK IoStatus;
2014 
2015  KeInitializeEvent(&Event, NotificationEvent, FALSE);
2016 
2017  Irp = IoBuildDeviceIoControlRequest( IOCTL_DISK_IS_WRITABLE,
2018  TargetDevice,
2019  NULL,
2020  0,
2021  NULL,
2022  0,
2023  FALSE,
2024  &Event,
2025  &IoStatus );
2026 
2027  if (Irp == NULL) {
2028  return FALSE;
2029  }
2030 
2031  SetFlag(IoGetNextIrpStackLocation(Irp)->Flags, SL_OVERRIDE_VERIFY_VOLUME);
2032 
2033  Status = IoCallDriver(TargetDevice, Irp);
2034 
2035  if (Status == STATUS_PENDING) {
2036 
2037  (VOID) KeWaitForSingleObject( &Event,
2038  Executive,
2039  KernelMode,
2040  FALSE,
2041  (PLARGE_INTEGER)NULL );
2042 
2043  Status = IoStatus.Status;
2044  }
2045 
2046  return (BOOLEAN)(Status == STATUS_MEDIA_WRITE_PROTECTED);
2047 }
2048 
2049 NTSTATUS
2050 Ext2MountVolume (IN PEXT2_IRP_CONTEXT IrpContext)
2051 {
2052  PDEVICE_OBJECT MainDeviceObject;
2053  BOOLEAN GlobalDataResourceAcquired = FALSE;
2054  PIRP Irp;
2055  PIO_STACK_LOCATION IoStackLocation;
2056  PDEVICE_OBJECT TargetDeviceObject;
2057  NTSTATUS Status = STATUS_UNRECOGNIZED_VOLUME;
2058  PDEVICE_OBJECT VolumeDeviceObject = NULL;
2059  PEXT2_VCB Vcb = NULL, OldVcb = NULL;
2060  PVPB OldVpb = NULL, Vpb = NULL;
2061  PEXT2_SUPER_BLOCK Ext2Sb = NULL;
2062  ULONG dwBytes;
2063  DISK_GEOMETRY DiskGeometry;
2064 
2065  _SEH2_TRY {
2066 
2067  ASSERT(IrpContext != NULL);
2068  ASSERT((IrpContext->Identifier.Type == EXT2ICX) &&
2069  (IrpContext->Identifier.Size == sizeof(EXT2_IRP_CONTEXT)));
2070 
2071  MainDeviceObject = IrpContext->DeviceObject;
2072 
2073  //
2074  // Make sure we can wait.
2075  //
2076 
2077  SetFlag(IrpContext->Flags, IRP_CONTEXT_FLAG_WAIT);
2078 
2079  //
2080  // This request is only allowed on the main device object
2081  //
2082  if (!IsExt2FsDevice(MainDeviceObject)) {
2083  Status = STATUS_INVALID_DEVICE_REQUEST;
2084  _SEH2_LEAVE;
2085  }
2086 
2087  if (IsFlagOn(Ext2Global->Flags, EXT2_UNLOAD_PENDING)) {
2088  Status = STATUS_UNRECOGNIZED_VOLUME;
2089  _SEH2_LEAVE;
2090  }
2091 
2092 #if 0
2093  if (IrpContext->RealDevice->Size >= sizeof(ULONG) + sizeof(DEVICE_OBJECT) &&
2094  *((PULONG)IrpContext->RealDevice->DeviceExtension) == 'DSSA') {
2095  } else {
2096  Status = STATUS_UNRECOGNIZED_VOLUME;
2097  _SEH2_LEAVE;
2098  }
2099 #endif
2100 
2101  Irp = IrpContext->Irp;
2102  IoStackLocation = IoGetCurrentIrpStackLocation(Irp);
2103  TargetDeviceObject =
2104  IoStackLocation->Parameters.MountVolume.DeviceObject;
2105 
2106  dwBytes = sizeof(DISK_GEOMETRY);
2107  Status = Ext2DiskIoControl(
2108  TargetDeviceObject,
2109  IOCTL_DISK_GET_DRIVE_GEOMETRY,
2110  NULL,
2111  0,
2112  &DiskGeometry,
2113  &dwBytes );
2114 
2115  if (!NT_SUCCESS(Status)) {
2116  _SEH2_LEAVE;
2117  }
2118 
2119  Status = IoCreateDevice(
2120  MainDeviceObject->DriverObject,
2121  sizeof(EXT2_VCB),
2122  NULL,
2123  FILE_DEVICE_DISK_FILE_SYSTEM,
2124  0,
2125  FALSE,
2126  &VolumeDeviceObject );
2127 
2128  if (!NT_SUCCESS(Status)) {
2129  _SEH2_LEAVE;
2130  }
2131  INC_MEM_COUNT(PS_VCB, VolumeDeviceObject, sizeof(EXT2_VCB));
2132 
2133 #ifdef _PNP_POWER_
2134  /* don't care about power management requests */
2135  VolumeDeviceObject->DeviceObjectExtension->PowerControlNeeded = FALSE;
2136 #endif
2137 
2138  VolumeDeviceObject->StackSize = (CCHAR)(TargetDeviceObject->StackSize + 1);
2139  ClearFlag(VolumeDeviceObject->Flags, DO_DEVICE_INITIALIZING);
2140 
2141 /*
2142  These are for buffer-address alignment requirements.
2143  Never do this check, unless you want fail user requests :)
2144 
2145  if (TargetDeviceObject->AlignmentRequirement >
2146  VolumeDeviceObject->AlignmentRequirement) {
2147 
2148  VolumeDeviceObject->AlignmentRequirement =
2149  TargetDeviceObject->AlignmentRequirement;
2150  }
2151 
2152  if (DiskGeometry.BytesPerSector - 1 >
2153  VolumeDeviceObject->AlignmentRequirement) {
2154  VolumeDeviceObject->AlignmentRequirement =
2155  DiskGeometry.BytesPerSector - 1;
2156  TargetDeviceObject->AlignmentRequirement =
2157  DiskGeometry.BytesPerSector - 1;
2158  }
2159 */
2160  (IoStackLocation->Parameters.MountVolume.Vpb)->DeviceObject =
2161  VolumeDeviceObject;
2162  Vpb = IoStackLocation->Parameters.MountVolume.Vpb;
2163 
2164  Vcb = (PEXT2_VCB) VolumeDeviceObject->DeviceExtension;
2165 
2166  RtlZeroMemory(Vcb, sizeof(EXT2_VCB));
2167  Vcb->Identifier.Type = EXT2VCB;
2168  Vcb->Identifier.Size = sizeof(EXT2_VCB);
2169  Vcb->TargetDeviceObject = TargetDeviceObject;
2170  Vcb->DiskGeometry = DiskGeometry;
2171  InitializeListHead(&Vcb->Next);
2172 
2173  Status = Ext2LoadSuper(Vcb, FALSE, &Ext2Sb);
2174  if (!NT_SUCCESS(Status)) {
2175  Vcb = NULL;
2176  Status = STATUS_UNRECOGNIZED_VOLUME;
2177  _SEH2_LEAVE;
2178  }
2179  ASSERT (NULL != Ext2Sb);
2180 
2181  /* check Linux Ext2/Ext3 volume magic */
2182  if (Ext2Sb->s_magic == EXT2_SUPER_MAGIC) {
2183  DEBUG(DL_INF, ( "Volume of ext2 file system is found.\n"));
2184  } else {
2185  Status = STATUS_UNRECOGNIZED_VOLUME;
2186  Vcb = NULL;
2187  _SEH2_LEAVE;
2188  }
2189 
2190  DEBUG(DL_DBG, ("Ext2MountVolume: DevObject=%p Vcb=%p\n", VolumeDeviceObject, Vcb));
2191 
2192  /* initialize Vcb structure */
2193  Status = Ext2InitializeVcb( IrpContext, Vcb, Ext2Sb,
2194  TargetDeviceObject,
2195  VolumeDeviceObject, Vpb);
2196 
2197  if (NT_SUCCESS(Status)) {
2198 
2199  PLIST_ENTRY List;
2200 
2201  ExAcquireResourceExclusiveLite(&(Ext2Global->Resource), TRUE);
2202  GlobalDataResourceAcquired = TRUE;
2203 
2204  for (List = Ext2Global->VcbList.Flink;
2205  List != &Ext2Global->VcbList;
2206  List = List->Flink) {
2207 
2208  OldVcb = CONTAINING_RECORD(List, EXT2_VCB, Next);
2209  OldVpb = OldVcb->Vpb;
2210 
2211  /* in case we are already in the queue, should not happen */
2212  if (OldVpb == Vpb) {
2213  continue;
2214  }
2215 
2216  if ( (OldVpb->SerialNumber == Vpb->SerialNumber) &&
2217  (!IsMounted(OldVcb)) && (IsFlagOn(OldVcb->Flags, VCB_NEW_VPB)) &&
2218  (OldVpb->RealDevice == TargetDeviceObject) &&
2219  (OldVpb->VolumeLabelLength == Vpb->VolumeLabelLength) &&
2220  (RtlEqualMemory(&OldVpb->VolumeLabel[0],
2221  &Vpb->VolumeLabel[0],
2222  Vpb->VolumeLabelLength)) &&
2223  (RtlEqualMemory(&OldVcb->SuperBlock->s_uuid[0],
2224  &Vcb->SuperBlock->s_uuid[0], 16)) ) {
2225  ClearFlag(OldVcb->Flags, VCB_MOUNTED);
2226  }
2227  }
2228 
2229  SetLongFlag(Vcb->Flags, VCB_MOUNTED);
2230  SetFlag(Vcb->Vpb->Flags, VPB_MOUNTED);
2231  Ext2InsertVcb(Vcb);
2232  Vcb = NULL;
2233  Vpb = NULL;
2234  ObDereferenceObject(TargetDeviceObject);
2235 
2236  } else {
2237 
2238  Vcb = NULL;
2239  }
2240 
2241  } _SEH2_FINALLY {
2242 
2243  if (GlobalDataResourceAcquired) {
2244  ExReleaseResourceLite(&Ext2Global->Resource);
2245  }
2246 
2247  if (!NT_SUCCESS(Status)) {
2248 
2249  if (!NT_SUCCESS(Status)) {
2250  if ( Vpb != NULL ) {
2251  Vpb->DeviceObject = NULL;
2252  }
2253  }
2254 
2255  if (Vcb) {
2256  Ext2DestroyVcb(Vcb);
2257  } else {
2258  if (Ext2Sb) {
2259  Ext2FreePool(Ext2Sb, EXT2_SB_MAGIC);
2260  }
2261  if (VolumeDeviceObject) {
2262  IoDeleteDevice(VolumeDeviceObject);
2263  DEC_MEM_COUNT(PS_VCB, VolumeDeviceObject, sizeof(EXT2_VCB));
2264  }
2265  }
2266  }
2267 
2268  if (!IrpContext->ExceptionInProgress) {
2269  Ext2CompleteIrpContext(IrpContext, Status);
2270  }
2271  } _SEH2_END;
2272 
2273  return Status;
2274 }
2275 
2276 VOID
2277 Ext2VerifyVcb (IN PEXT2_IRP_CONTEXT IrpContext,
2278  IN PEXT2_VCB Vcb )
2279 {
2280  NTSTATUS Status = STATUS_SUCCESS;
2281 
2282  BOOLEAN bVerify = FALSE;
2283  ULONG ChangeCount = 0;
2284  ULONG dwBytes;
2285 
2286  PIRP Irp;
2287  PEXTENDED_IO_STACK_LOCATION IrpSp;
2288 
2289  _SEH2_TRY {
2290 
2291  ASSERT(IrpContext != NULL);
2292 
2293  ASSERT((IrpContext->Identifier.Type == EXT2ICX) &&
2294  (IrpContext->Identifier.Size == sizeof(EXT2_IRP_CONTEXT)));
2295 
2296  Irp = IrpContext->Irp;
2297  IrpSp = (PEXTENDED_IO_STACK_LOCATION)IoGetCurrentIrpStackLocation(Irp);
2298 
2299  bVerify = IsFlagOn(Vcb->Vpb->RealDevice->Flags, DO_VERIFY_VOLUME);
2300 
2301  if ( (IsFlagOn(Vcb->Flags, VCB_REMOVABLE_MEDIA) ||
2302  IsFlagOn(Vcb->Flags, VCB_FLOPPY_DISK)) && !bVerify ) {
2303 
2304  dwBytes = sizeof(ULONG);
2305  Status = Ext2DiskIoControl(
2306  Vcb->TargetDeviceObject,
2307  IOCTL_DISK_CHECK_VERIFY,
2308  NULL,
2309  0,
2310  &ChangeCount,
2311  &dwBytes );
2312 
2313  if ( STATUS_VERIFY_REQUIRED == Status ||
2314  STATUS_DEVICE_NOT_READY == Status ||
2315  STATUS_NO_MEDIA_IN_DEVICE == Status ||
2316  (NT_SUCCESS(Status) &&
2317  (ChangeCount != Vcb->ChangeCount))) {
2318 
2319  KIRQL Irql;
2320 
2321  IoAcquireVpbSpinLock(&Irql);
2322  if (Vcb->Vpb == Vcb->Vpb->RealDevice->Vpb) {
2323  SetFlag(Vcb->Vpb->RealDevice->Flags, DO_VERIFY_VOLUME);
2324  }
2325  IoReleaseVpbSpinLock(Irql);
2326 
2327  } else {
2328 
2329  if (!NT_SUCCESS(Status)) {
2330  Ext2NormalizeAndRaiseStatus(IrpContext, Status);
2331  }
2332  }
2333  }
2334 
2335  if ( IsFlagOn(Vcb->Vpb->RealDevice->Flags, DO_VERIFY_VOLUME)) {
2336  IoSetHardErrorOrVerifyDevice( Irp, Vcb->Vpb->RealDevice );
2337  Ext2NormalizeAndRaiseStatus ( IrpContext,
2338  STATUS_VERIFY_REQUIRED );
2339  }
2340 
2341  if (IsMounted(Vcb)) {
2342 
2343  if ( (IrpContext->MajorFunction == IRP_MJ_WRITE) ||
2344  (IrpContext->MajorFunction == IRP_MJ_SET_INFORMATION) ||
2345  (IrpContext->MajorFunction == IRP_MJ_SET_EA) ||
2346  (IrpContext->MajorFunction == IRP_MJ_FLUSH_BUFFERS) ||
2347  (IrpContext->MajorFunction == IRP_MJ_SET_VOLUME_INFORMATION) ||
2348  (IrpContext->MajorFunction == IRP_MJ_FILE_SYSTEM_CONTROL &&
2349  IrpContext->MinorFunction == IRP_MN_USER_FS_REQUEST &&
2350  IrpSp->Parameters.FileSystemControl.FsControlCode ==
2351  FSCTL_MARK_VOLUME_DIRTY)) {
2352 
2353  if (IsFlagOn(Vcb->Flags, VCB_WRITE_PROTECTED)) {
2354 
2355  KIRQL Irql;
2356 
2357  IoAcquireVpbSpinLock(&Irql);
2358  if (Vcb->Vpb == Vcb->Vpb->RealDevice->Vpb) {
2359  SetFlag (Vcb->Vpb->RealDevice->Flags, DO_VERIFY_VOLUME);
2360  }
2361  IoReleaseVpbSpinLock(Irql);
2362 
2363  IoSetHardErrorOrVerifyDevice( Irp, Vcb->Vpb->RealDevice );
2364 
2365  Ext2RaiseStatus(IrpContext, STATUS_MEDIA_WRITE_PROTECTED);
2366  }
2367  }
2368  }
2369 
2370  } _SEH2_FINALLY {
2371 
2372  } _SEH2_END;
2373 
2374 }
2375 
2376 
2377 NTSTATUS
2378 Ext2VerifyVolume (IN PEXT2_IRP_CONTEXT IrpContext)
2379 {
2380  PDEVICE_OBJECT DeviceObject;
2381  NTSTATUS Status = STATUS_UNSUCCESSFUL;
2382  PEXT2_SUPER_BLOCK ext2_sb = NULL;
2383  PEXT2_VCB Vcb = NULL;
2384  BOOLEAN VcbResourceAcquired = FALSE;
2385  PIRP Irp;
2386  ULONG ChangeCount = 0;
2387  ULONG dwBytes;
2388 
2389  _SEH2_TRY {
2390 
2391  ASSERT(IrpContext != NULL);
2392  ASSERT((IrpContext->Identifier.Type == EXT2ICX) &&
2393  (IrpContext->Identifier.Size == sizeof(EXT2_IRP_CONTEXT)));
2394 
2395  DeviceObject = IrpContext->DeviceObject;
2396  //
2397  // This request is not allowed on the main device object
2398  //
2399  if (IsExt2FsDevice(DeviceObject)) {
2400  Status = STATUS_INVALID_DEVICE_REQUEST;
2401  _SEH2_LEAVE;
2402  }
2403 
2404  Vcb = (PEXT2_VCB) DeviceObject->DeviceExtension;
2405  ASSERT(Vcb != NULL);
2406  ASSERT((Vcb->Identifier.Type == EXT2VCB) &&
2407  (Vcb->Identifier.Size == sizeof(EXT2_VCB)));
2408 
2409  VcbResourceAcquired =
2410  ExAcquireResourceExclusiveLite(
2411  &Vcb->MainResource,
2412  TRUE );
2413 
2414  if (!FlagOn(Vcb->TargetDeviceObject->Flags, DO_VERIFY_VOLUME)) {
2415  Status = STATUS_SUCCESS;
2416  _SEH2_LEAVE;
2417  }
2418 
2419  if (!IsMounted(Vcb)) {
2420  Status = STATUS_WRONG_VOLUME;
2421  _SEH2_LEAVE;
2422  }
2423 
2424  dwBytes = sizeof(ULONG);
2425  Status = Ext2DiskIoControl(
2426  Vcb->TargetDeviceObject,
2427  IOCTL_DISK_CHECK_VERIFY,
2428  NULL,
2429  0,
2430  &ChangeCount,
2431  &dwBytes );
2432 
2433 
2434  if (!NT_SUCCESS(Status)) {
2435  Status = STATUS_WRONG_VOLUME;
2436  _SEH2_LEAVE;
2437  } else {
2438  Vcb->ChangeCount = ChangeCount;
2439  }
2440 
2441  Irp = IrpContext->Irp;
2442 
2443  Status = Ext2LoadSuper(Vcb, TRUE, &ext2_sb);
2444 
2445  if (!NT_SUCCESS(Status)) {
2446  _SEH2_LEAVE;
2447  }
2448 
2449  ASSERT(NULL != ext2_sb);
2450  if ((ext2_sb->s_magic == EXT2_SUPER_MAGIC) &&
2451  (memcmp(ext2_sb->s_uuid, SUPER_BLOCK->s_uuid, 16) == 0) &&
2452  (memcmp(ext2_sb->s_volume_name, SUPER_BLOCK->s_volume_name, 16) ==0)) {
2453 
2454  ClearFlag(Vcb->TargetDeviceObject->Flags, DO_VERIFY_VOLUME);
2455 
2456  if (Ext2IsMediaWriteProtected(IrpContext, Vcb->TargetDeviceObject)) {
2457  SetLongFlag(Vcb->Flags, VCB_WRITE_PROTECTED);
2458  } else {
2459  ClearLongFlag(Vcb->Flags, VCB_WRITE_PROTECTED);
2460  }
2461 
2462  DEBUG(DL_INF, ( "Ext2VerifyVolume: Volume verify succeeded.\n"));
2463 
2464  } else {
2465 
2466  Status = STATUS_WRONG_VOLUME;
2467  Ext2PurgeVolume(Vcb, FALSE);
2468 
2469  SetLongFlag(Vcb->Flags, VCB_DISMOUNT_PENDING);
2470  ClearFlag(Vcb->TargetDeviceObject->Flags, DO_VERIFY_VOLUME);
2471 
2472  DEBUG(DL_INF, ( "Ext2VerifyVolume: Volume verify failed.\n"));
2473  }
2474 
2475  } _SEH2_FINALLY {
2476 
2477  if (ext2_sb)
2478  Ext2FreePool(ext2_sb, EXT2_SB_MAGIC);
2479 
2480  if (VcbResourceAcquired) {
2481  ExReleaseResourceLite(&Vcb->MainResource);
2482  }
2483 
2484  if (!IrpContext->ExceptionInProgress) {
2485  Ext2CompleteIrpContext(IrpContext, Status);
2486  }
2487  } _SEH2_END;
2488 
2489  return Status;
2490 }
2491 
2492 
2493 NTSTATUS
2494 Ext2IsVolumeMounted (IN PEXT2_IRP_CONTEXT IrpContext)
2495 {
2496  PDEVICE_OBJECT DeviceObject;
2497  PEXT2_VCB Vcb = 0;
2498  NTSTATUS Status = STATUS_SUCCESS;
2499 
2500  ASSERT(IrpContext);
2501 
2502  ASSERT((IrpContext->Identifier.Type == EXT2ICX) &&
2503  (IrpContext->Identifier.Size == sizeof(EXT2_IRP_CONTEXT)));
2504 
2505 
2506  DeviceObject = IrpContext->DeviceObject;
2507 
2508  Vcb = (PEXT2_VCB) DeviceObject->DeviceExtension;
2509 
2510  ASSERT(IsMounted(Vcb));
2511 
2512  Ext2VerifyVcb (IrpContext, Vcb);
2513 
2514  Ext2CompleteIrpContext(IrpContext, Status);
2515 
2516  return Status;
2517 }
2518 
2519 
2520 NTSTATUS
2521 Ext2DismountVolume (IN PEXT2_IRP_CONTEXT IrpContext)
2522 {
2523  PDEVICE_OBJECT DeviceObject;
2524  NTSTATUS Status = STATUS_UNSUCCESSFUL;
2525  PEXT2_VCB Vcb = NULL;
2526  BOOLEAN VcbResourceAcquired = FALSE;
2527 
2528  _SEH2_TRY {
2529 
2530  ASSERT(IrpContext != NULL);
2531 
2532  ASSERT((IrpContext->Identifier.Type == EXT2ICX) &&
2533  (IrpContext->Identifier.Size == sizeof(EXT2_IRP_CONTEXT)));
2534 
2535  DeviceObject = IrpContext->DeviceObject;
2536 
2537  //
2538  // This request is not allowed on the main device object
2539  //
2540  if (IsExt2FsDevice(DeviceObject)) {
2541  Status = STATUS_INVALID_DEVICE_REQUEST;
2542  _SEH2_LEAVE;
2543  }
2544 
2545  Vcb = (PEXT2_VCB) DeviceObject->DeviceExtension;
2546 
2547  ASSERT(Vcb != NULL);
2548 
2549  ASSERT((Vcb->Identifier.Type == EXT2VCB) &&
2550  (Vcb->Identifier.Size == sizeof(EXT2_VCB)));
2551 
2552  ASSERT(IsMounted(Vcb));
2553 
2554  ExAcquireResourceExclusiveLite(
2555  &Vcb->MainResource,
2556  TRUE );
2557 
2558  VcbResourceAcquired = TRUE;
2559 
2560  if ( IsFlagOn(Vcb->Flags, VCB_DISMOUNT_PENDING)) {
2561  Status = STATUS_VOLUME_DISMOUNTED;
2562  _SEH2_LEAVE;
2563  }
2564 
2565  Ext2FlushFiles(IrpContext, Vcb, FALSE);
2566  Ext2FlushVolume(IrpContext, Vcb, FALSE);
2567 
2568  ExReleaseResourceLite(&Vcb->MainResource);
2569  VcbResourceAcquired = FALSE;
2570 
2571  Ext2PurgeVolume(Vcb, TRUE);
2572  Ext2CheckDismount(IrpContext, Vcb, TRUE);
2573 
2574  DEBUG(DL_INF, ( "Ext2Dismount: Volume dismount pending.\n"));
2575  Status = STATUS_SUCCESS;
2576 
2577  } _SEH2_FINALLY {
2578 
2579  if (VcbResourceAcquired) {
2580  ExReleaseResourceLite(&Vcb->MainResource);
2581  }
2582 
2583  if (!IrpContext->ExceptionInProgress) {
2584  Ext2CompleteIrpContext(IrpContext, Status);
2585  }
2586  } _SEH2_END;
2587 
2588  return Status;
2589 }
2590 
2591 BOOLEAN
2592 Ext2CheckDismount (
2593  IN PEXT2_IRP_CONTEXT IrpContext,
2594  IN PEXT2_VCB Vcb,
2595  IN BOOLEAN bForce )
2596 {
2597  KIRQL Irql;
2598  PVPB Vpb = Vcb->Vpb, NewVpb = NULL;
2599  BOOLEAN bDeleted = FALSE, bTearDown = FALSE;
2600  ULONG UnCleanCount = 0;
2601 
2602  NewVpb = ExAllocatePoolWithTag(NonPagedPool, VPB_SIZE, TAG_VPB);
2603  if (NewVpb == NULL) {
2604  DEBUG(DL_ERR, ( "Ex2CheckDismount: failed to allocate NewVpb.\n"));
2605  return FALSE;
2606  }
2607  DEBUG(DL_DBG, ("Ext2CheckDismount: NewVpb allocated: %p\n", NewVpb));
2608  INC_MEM_COUNT(PS_VPB, NewVpb, sizeof(VPB));
2609  memset(NewVpb, '_', VPB_SIZE);
2610  RtlZeroMemory(NewVpb, sizeof(VPB));
2611 
2612  ExAcquireResourceExclusiveLite(
2613  &Ext2Global->Resource, TRUE );
2614 
2615  ExAcquireResourceExclusiveLite(
2616  &Vcb->MainResource, TRUE );
2617 
2618  if (IrpContext &&
2619  IrpContext->MajorFunction == IRP_MJ_CREATE &&
2620  IrpContext->RealDevice == Vcb->RealDevice) {
2621  UnCleanCount = 2;
2622  } else {
2623  UnCleanCount = 1;
2624  }
2625 
2626  IoAcquireVpbSpinLock (&Irql);
2627 
2628  DEBUG(DL_DBG, ("Ext2CheckDismount: Vpb %p ioctl=%d Device %p\n",
2629  Vpb, Vpb->ReferenceCount, Vpb->RealDevice));
2630 
2631  if (Vpb->ReferenceCount <= UnCleanCount) {
2632 
2633  if (!IsFlagOn(Vcb->Flags, VCB_DISMOUNT_PENDING)) {
2634 
2635  ClearFlag(Vpb->Flags, VPB_MOUNTED);
2636  ClearFlag(Vpb->Flags, VPB_LOCKED);
2637 
2638  if ((Vcb->RealDevice != Vpb->RealDevice) &&
2639  (Vcb->RealDevice->Vpb == Vpb)) {
2640  SetFlag(Vcb->RealDevice->Flags, DO_DEVICE_INITIALIZING);
2641  SetFlag(Vpb->Flags, VPB_PERSISTENT );
2642  }
2643 
2644  Ext2RemoveVcb(Vcb);
2645  SetLongFlag(Vcb->Flags, VCB_DISMOUNT_PENDING);
2646  }
2647 
2648  if (Vpb->ReferenceCount) {
2649  bTearDown = TRUE;
2650  } else {
2651  bDeleted = TRUE;
2652  Vpb->DeviceObject = NULL;
2653  }
2654 
2655  DEBUG(DL_DBG, ("Ext2CheckDismount: Vpb: %p bDeleted=%d bTearDown=%d\n",
2656  Vpb, bDeleted, bTearDown));
2657 
2658 
2659  } else if (bForce) {
2660 
2661  DEBUG(DL_DBG, ( "Ext2CheckDismount: New/Old Vpb %p/%p Realdevice = %p\n",
2662  NewVpb, Vcb->Vpb, Vpb->RealDevice));
2663 
2664  /* keep vpb president and later we'll free it */
2665  SetFlag(Vpb->Flags, VPB_PERSISTENT);
2666 
2667  Vcb->Vpb2 = Vcb->Vpb;
2668  NewVpb->Type = IO_TYPE_VPB;
2669  NewVpb->Size = sizeof(VPB);
2670  NewVpb->Flags = Vpb->Flags & VPB_REMOVE_PENDING;
2671  NewVpb->RealDevice = Vpb->RealDevice;
2672  NewVpb->RealDevice->Vpb = NewVpb;
2673  NewVpb = NULL;
2674  ClearFlag(Vpb->Flags, VPB_MOUNTED);
2675  SetLongFlag(Vcb->Flags, VCB_NEW_VPB);
2676  ClearLongFlag(Vcb->Flags, VCB_MOUNTED);
2677  }
2678 
2679  IoReleaseVpbSpinLock(Irql);
2680 
2681  ExReleaseResourceLite(&Vcb->MainResource);
2682  ExReleaseResourceLite(&Ext2Global->Resource);
2683 
2684  if (bTearDown) {
2685  DEBUG(DL_DBG, ( "Ext2CheckDismount: Tearing vcb %p ...\n", Vcb));
2686  Ext2TearDownStream(Vcb);
2687  }
2688 
2689  if (bDeleted) {
2690  DEBUG(DL_DBG, ( "Ext2CheckDismount: Deleting vcb %p ...\n", Vcb));
2691  Ext2DestroyVcb(Vcb);
2692  }
2693 
2694  if (NewVpb != NULL) {
2695  DEBUG(DL_DBG, ( "Ext2CheckDismount: freeing new Vpb %p\n", NewVpb));
2696  ExFreePoolWithTag(NewVpb, TAG_VPB);
2697  DEC_MEM_COUNT(PS_VPB, NewVpb, sizeof(VPB));
2698  }
2699 
2700  return bDeleted;
2701 }
2702 
2703 NTSTATUS
2704 Ext2PurgeVolume (IN PEXT2_VCB Vcb,
2705  IN BOOLEAN FlushBeforePurge )
2706 {
2707  PEXT2_FCB Fcb;
2708  LIST_ENTRY List, *Next;
2709 
2710  BOOLEAN VcbResourceAcquired = FALSE;
2711  BOOLEAN FcbResourceAcquired = FALSE;
2712  BOOLEAN gdResourceAcquired = FALSE;
2713 
2714  _SEH2_TRY {
2715 
2716  ASSERT(Vcb != NULL);
2717  ASSERT((Vcb->Identifier.Type == EXT2VCB) &&
2718  (Vcb->Identifier.Size == sizeof(EXT2_VCB)));
2719 
2720  ExAcquireResourceExclusiveLite(&Vcb->MainResource, TRUE);
2721  VcbResourceAcquired = TRUE;
2722 
2723  if (IsVcbReadOnly(Vcb)) {
2724  FlushBeforePurge = FALSE;
2725  }
2726 
2727  InitializeListHead(&List);
2728 
2729  ExAcquireResourceExclusiveLite(&Vcb->FcbLock, TRUE);
2730  FcbResourceAcquired = TRUE;
2731 
2732  while (!IsListEmpty(&Vcb->FcbList)) {
2733 
2734  Next = RemoveHeadList(&Vcb->FcbList);
2735  Fcb = CONTAINING_RECORD(Next, EXT2_FCB, Next);
2736 
2737  DEBUG(DL_INF, ( "Ext2PurgeVolume: %wZ refercount=%xh\n",
2738  &Fcb->Mcb->FullName, Fcb->ReferenceCount));
2739  InsertTailList(&List, &Fcb->Next);
2740  }
2741 
2742  while (!IsListEmpty(&List)) {
2743 
2744  Next = RemoveHeadList(&List);
2745  Fcb = CONTAINING_RECORD(Next, EXT2_FCB, Next);
2746 
2747  if (ExAcquireResourceExclusiveLite(
2748  &Fcb->MainResource,
2749  TRUE )) {
2750 
2751  Ext2PurgeFile(Fcb, FlushBeforePurge);
2752 
2753  if (Fcb->ReferenceCount <= 1) {
2754  Fcb->TsDrop.QuadPart = 0;
2755  InsertHeadList(&Vcb->FcbList, &Fcb->Next);
2756  } else {
2757  InsertTailList(&Vcb->FcbList, &Fcb->Next);
2758  }
2759  ExReleaseResourceLite(&Fcb->MainResource);
2760  }
2761  }
2762 
2763  if (FcbResourceAcquired) {
2764  ExReleaseResourceLite(&Vcb->FcbLock);
2765  FcbResourceAcquired = FALSE;
2766  }
2767 
2768  /* acquire bd lock to avoid bh creation */
2769  ExAcquireResourceExclusiveLite(&Vcb->sbi.s_gd_lock, TRUE);
2770  gdResourceAcquired = TRUE;
2771 
2772  /* discard buffer_headers for group_desc */
2773  Ext2DropBH(Vcb);
2774 
2775  if (FlushBeforePurge) {
2776  ExAcquireSharedStarveExclusive(&Vcb->PagingIoResource, TRUE);
2777  ExReleaseResourceLite(&Vcb->PagingIoResource);
2778 
2779  CcFlushCache(&Vcb->SectionObject, NULL, 0, NULL);
2780  }
2781 
2782  if (Vcb->SectionObject.ImageSectionObject) {
2783  MmFlushImageSection(&Vcb->SectionObject, MmFlushForWrite);
2784  }
2785 
2786  if (Vcb->SectionObject.DataSectionObject) {
2787  CcPurgeCacheSection(&Vcb->SectionObject, NULL, 0, FALSE);
2788  }
2789 
2790  DEBUG(DL_INF, ( "Ext2PurgeVolume: Volume flushed and purged.\n"));
2791 
2792  } _SEH2_FINALLY {
2793 
2794  if (gdResourceAcquired) {
2795  ExReleaseResourceLite(&Vcb->sbi.s_gd_lock);
2796  }
2797 
2798  if (FcbResourceAcquired) {
2799  ExReleaseResourceLite(&Vcb->FcbLock);
2800  }
2801 
2802  if (VcbResourceAcquired) {
2803  ExReleaseResourceLite(&Vcb->MainResource);
2804  }
2805  } _SEH2_END;
2806 
2807  return STATUS_SUCCESS;
2808 }
2809 
2810 NTSTATUS
2811 Ext2PurgeFile ( IN PEXT2_FCB Fcb,
2812  IN BOOLEAN FlushBeforePurge )
2813 {
2814  IO_STATUS_BLOCK IoStatus;
2815 
2816  ASSERT(Fcb != NULL);
2817 
2818  ASSERT((Fcb->Identifier.Type == EXT2FCB) &&
2819  (Fcb->Identifier.Size == sizeof(EXT2_FCB)));
2820 
2821 
2822  if (!IsVcbReadOnly(Fcb->Vcb) && FlushBeforePurge) {
2823  DEBUG(DL_INF, ( "Ext2PurgeFile: CcFlushCache on %wZ.\n",
2824  &Fcb->Mcb->FullName));
2825  ExAcquireSharedStarveExclusive(&Fcb->PagingIoResource, TRUE);
2826  ExReleaseResourceLite(&Fcb->PagingIoResource);
2827  CcFlushCache(&Fcb->SectionObject, NULL, 0, &IoStatus);
2828  ClearFlag(Fcb->Flags, FCB_FILE_MODIFIED);
2829  }
2830 
2831  if (Fcb->SectionObject.ImageSectionObject) {
2832  DEBUG(DL_INF, ( "Ext2PurgeFile: MmFlushImageSection on %wZ.\n",
2833  &Fcb->Mcb->FullName));
2834  MmFlushImageSection(&Fcb->SectionObject, MmFlushForWrite);
2835  }
2836 
2837  if (Fcb->SectionObject.DataSectionObject) {
2838  DEBUG(DL_INF, ( "Ext2PurgeFile: CcPurgeCacheSection on %wZ.\n",
2839  &Fcb->Mcb->FullName));
2840  CcPurgeCacheSection(&Fcb->SectionObject, NULL, 0, FALSE);
2841  }
2842 
2843  return STATUS_SUCCESS;
2844 }
2845 
2846 
2847 NTSTATUS
2848 Ext2FileSystemControl (IN PEXT2_IRP_CONTEXT IrpContext)
2849 {
2850  NTSTATUS Status;
2851 
2852  ASSERT(IrpContext);
2853 
2854  ASSERT((IrpContext->Identifier.Type == EXT2ICX) &&
2855  (IrpContext->Identifier.Size == sizeof(EXT2_IRP_CONTEXT)));
2856 
2857  switch (IrpContext->MinorFunction) {
2858 
2859  case IRP_MN_USER_FS_REQUEST:
2860  Status = Ext2UserFsRequest(IrpContext);
2861  break;
2862 
2863  case IRP_MN_MOUNT_VOLUME:
2864  Status = Ext2MountVolume(IrpContext);
2865  break;
2866 
2867  case IRP_MN_VERIFY_VOLUME:
2868  Status = Ext2VerifyVolume(IrpContext);
2869  break;
2870 
2871  default:
2872 
2873  DEBUG(DL_ERR, ( "Ext2FilsSystemControl: Invalid Device Request.\n"));
2874  Status = STATUS_INVALID_DEVICE_REQUEST;
2875  Ext2CompleteIrpContext(IrpContext, Status);
2876  }
2877 
2878  return Status;
2879 }
DO_DEVICE_INITIALIZING
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Definition: env_spec_w32.h:399
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Definition: retypes.h:7
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Definition: generic.c:25
CcPurgeCacheSection
BOOLEAN NTAPI CcPurgeCacheSection(IN PSECTION_OBJECT_POINTERS SectionObjectPointer, IN OPTIONAL PLARGE_INTEGER FileOffset, IN ULONG Length, IN BOOLEAN UninitializeCacheMaps)
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Definition: glfuncs.h:248
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Definition: obref.c:496
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Definition: Header.h:8
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Definition: iotypes.h:434
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Definition: write.c:652
Ext2NotifyReportChange
VOID Ext2NotifyReportChange(IN PEXT2_IRP_CONTEXT IrpContext, IN PEXT2_VCB Vcb, IN PEXT2_MCB Mcb, IN ULONG Filter, IN ULONG Action)
Definition: dirctl.c:1209
EXCEPTION_EXECUTE_HANDLER
#define EXCEPTION_EXECUTE_HANDLER
Definition: excpt.h:85
RETRIEVAL_POINTERS_BUFFER::StartingVcn
LARGE_INTEGER StartingVcn
Definition: winioctl.h:527
Ext2UnicodeToOEM
NTSTATUS Ext2UnicodeToOEM(IN PEXT2_VCB Vcb, IN OUT POEM_STRING Oem, IN PUNICODE_STRING Unicode)
Definition: misc.c:261
Ext2DropBH
VOID Ext2DropBH(IN PEXT2_VCB Vcb)
Definition: generic.c:262
_DEVICE_OBJECT::DeviceExtension
PVOID DeviceExtension
Definition: env_spec_w32.h:418
BOOLEAN
unsigned char BOOLEAN
Definition: ProcessorBind.h:185
BLOCK_BITS
#define BLOCK_BITS
Definition: stream.h:22
_REPARSE_DATA_BUFFER::DataBuffer
UCHAR DataBuffer[1]
Definition: shellext.h:164
NULL
smooth NULL
Definition: ftsmooth.c:416
INC_MEM_COUNT
#define INC_MEM_COUNT(_i, _p, _s)
Definition: ext2fs.h:598
_SEH2_AbnormalTermination
#define _SEH2_AbnormalTermination()
Definition: pseh2_64.h:13
Ext2AllowExtendedDasdIo
NTSTATUS Ext2AllowExtendedDasdIo(IN PEXT2_IRP_CONTEXT IrpContext)
Definition: fsctl.c:407
RemoveHeadList
FORCEINLINE PLIST_ENTRY RemoveHeadList(_Inout_ PLIST_ENTRY ListHead)
Definition: rtlfuncs.h:128
Ext2GetRetrievalPointerBase
NTSTATUS Ext2GetRetrievalPointerBase(IN PEXT2_IRP_CONTEXT IrpContext)
Definition: fsctl.c:1160
SL_OVERRIDE_VERIFY_VOLUME
#define SL_OVERRIDE_VERIFY_VOLUME
Definition: iotypes.h:1779
Ext2AllocateFcb
PEXT2_FCB Ext2AllocateFcb(IN PEXT2_VCB Vcb, IN PEXT2_MCB Mcb)
Definition: memory.c:131
STATUS_MEDIA_WRITE_PROTECTED
#define STATUS_MEDIA_WRITE_PROTECTED
Definition: udferr_usr.h:161
Ext2OplockRequest
NTSTATUS Ext2OplockRequest(IN PEXT2_IRP_CONTEXT IrpContext)
Definition: fsctl.c:451
Ext2UserFsRequest
NTSTATUS Ext2UserFsRequest(IN PEXT2_IRP_CONTEXT IrpContext)
Definition: fsctl.c:1903
ClearLongFlag
#define ClearLongFlag(_F, _SF)
Definition: ext2fs.h:254
Ext2PurgeVolume
NTSTATUS Ext2PurgeVolume(IN PEXT2_VCB Vcb, IN BOOLEAN FlushBeforePurge)
Definition: fsctl.c:2704
Buffer
Definition: bufpool.h:45
Ext2IsFastIoPossible
FAST_IO_POSSIBLE Ext2IsFastIoPossible(IN PEXT2_FCB Fcb)
Definition: fastio.c:38
OutputBuffer
_Must_inspect_result_ __drv_aliasesMem _In_ PDEVICE_OBJECT _In_opt_ PVOID _In_ ULONG _Out_opt_ PVOID OutputBuffer
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void * PVOID
Definition: retypes.h:9
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VPB_REMOVE_PENDING
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_Inout_ PFILE_OBJECT FileObject
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Definition: ext2fs.h:1035
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Definition: ntifs_ex.h:381
FsRtlAreThereCurrentFileLocks
#define FsRtlAreThereCurrentFileLocks(FL)
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STATUS_FILE_DELETED
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Definition: udferr_usr.h:172
CONTAINING_RECORD
PFLT_MESSAGE_WAITER_QUEUE CONTAINING_RECORD(Csq, DEVICE_EXTENSION, IrpQueue)) -> WaiterQ.mLock) _IRQL_raises_(DISPATCH_LEVEL) VOID NTAPI FltpAcquireMessageWaiterLock(_In_ PIO_CSQ Csq, _Out_ PKIRQL Irql)
Definition: Messaging.c:560
SUPER_BLOCK
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Definition: ext2fs.h:90
RETRIEVAL_POINTERS_BUFFER::Extents
struct RETRIEVAL_POINTERS_BUFFER::@3200 Extents[1]
bVerify
static BOOL bVerify
Definition: verify.c:27
Ext2OEMToUnicodeSize
ULONG Ext2OEMToUnicodeSize(IN PEXT2_VCB Vcb, IN PANSI_STRING Oem)
Definition: misc.c:183
FILE_DEVICE_DISK_FILE_SYSTEM
#define FILE_DEVICE_DISK_FILE_SYSTEM
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Definition: nt_native.h:834
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group
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ULONG OpenHandleCount
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CcWaitForCurrentLazyWriterActivity
NTSTATUS NTAPI CcWaitForCurrentLazyWriterActivity(VOID)
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LONGLONG
int64_t LONGLONG
Definition: typedefs.h:66
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struct _LIST_ENTRY * Flink
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Handle
_In_ HANDLE Handle
Definition: extypes.h:390
IRP_MN_USER_FS_REQUEST
#define IRP_MN_USER_FS_REQUEST
Definition: iotypes.h:4046
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Definition: ext2fs.h:1407
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NTSYSAPI ULONG NTAPI RtlEqualMemory(CONST VOID *Source1, CONST VOID *Source2, ULONG Length)
List
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Definition: psmgr.c:57
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#define FSCTL_DELETE_REPARSE_POINT
Definition: winioctl.h:99
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Definition: macro.lex.yy.c:714
Ext2Global
PEXT2_GLOBAL Ext2Global
Definition: init.c:16
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__wchar_t WCHAR
Definition: xmlstorage.h:180
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NTSTATUS Ext2InvalidateVolumes(IN PEXT2_IRP_CONTEXT IrpContext)
Definition: fsctl.c:296
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Definition: apphelp.c:32
STATUS_PENDING
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Definition: ntstatus.h:82
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Definition: ext2fs.h:1399
MmFlushImageSection
BOOLEAN NTAPI MmFlushImageSection(IN PSECTION_OBJECT_POINTERS SectionObjectPointer, IN MMFLUSH_TYPE FlushType)
Definition: section.c:4796
FSCTL_REQUEST_OPLOCK_LEVEL_2
#define FSCTL_REQUEST_OPLOCK_LEVEL_2
Definition: nt_native.h:827
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Definition: typedefs.h:50
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Definition: ext2fs.h:805
S_ISDIR
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Definition: various.h:18
IRP_MJ_FILE_SYSTEM_CONTROL
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_VPB::RealDevice
struct _DEVICE_OBJECT * RealDevice
Definition: iotypes.h:172
Vcb
#define Vcb
Definition: cdprocs.h:1425
Ext2InspectReparseData
NTSTATUS Ext2InspectReparseData(IN PREPARSE_DATA_BUFFER RDB, IN ULONG InputBufferLength)
Definition: fsctl.c:1293
CCB_OPEN_REPARSE_POINT
#define CCB_OPEN_REPARSE_POINT
Definition: ext2fs.h:1025
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struct _EXT2_VCB EXT2_VCB
Flag
Definition: xml2sdb.h:79
Ext2UnicodeToOEMSize
ULONG Ext2UnicodeToOEMSize(IN PEXT2_VCB Vcb, IN PUNICODE_STRING Unicode)
Definition: misc.c:239
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static FILE * out
Definition: regtests2xml.c:44
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Definition: typedefs.h:71
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Definition: iotypes.h:2866
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#define Ext2ReferXcb(_C)
Definition: ext2fs.h:967
STATUS_ACCESS_DENIED
#define STATUS_ACCESS_DENIED
Definition: udferr_usr.h:145
Privilege
BOOL Privilege(LPTSTR pszPrivilege, BOOL bEnable)
Definition: user_lib.cpp:531
Length
_In_ ULONG _In_ ULONG _In_ ULONG Length
Definition: ntddpcm.h:101
EXT2_LINKLEN_IN_INODE
#define EXT2_LINKLEN_IN_INODE
Definition: ext2fs.h:76
ExReleaseResourceLite
VOID FASTCALL ExReleaseResourceLite(IN PERESOURCE Resource)
Definition: resource.c:1817
PFILE_OBJECT
* PFILE_OBJECT
Definition: iotypes.h:1954
data
GLint GLenum GLsizei GLsizei GLsizei GLint GLsizei const GLvoid * data
Definition: gl.h:1950
FSCTL_ALLOW_EXTENDED_DASD_IO
#define FSCTL_ALLOW_EXTENDED_DASD_IO
Definition: winioctl.h:124
Ext2InsertVcb
VOID Ext2InsertVcb(PEXT2_VCB Vcb)
Definition: memory.c:1931
ASSERT
ASSERT((InvokeOnSuccess||InvokeOnError||InvokeOnCancel) ?(CompletionRoutine !=NULL) :TRUE)
STATUS_UNSUCCESSFUL
#define STATUS_UNSUCCESSFUL
Definition: udferr_usr.h:132
_FCB::Flags
ULONG Flags
Definition: ntfs.h:520
VCB_WRITE_PROTECTED
#define VCB_WRITE_PROTECTED
Definition: ext2fs.h:796
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#define ExAllocatePoolWithTag(hernya, size, tag)
Definition: env_spec_w32.h:350
_FCB::Mcb
CD_MCB Mcb
Definition: cdstruc.h:1022
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unsigned char UCHAR
Definition: xmlstorage.h:181
zero
static double zero
Definition: j0_y0.c:96
LARGE_INTEGER
union _LARGE_INTEGER LARGE_INTEGER
ProbeForRead
VOID NTAPI ProbeForRead(IN CONST VOID *Address, IN SIZE_T Length, IN ULONG Alignment)
Definition: exintrin.c:102
Parameters
_In_ PPCI_DEVICE_PRESENCE_PARAMETERS Parameters
Definition: iotypes.h:871
VCB_DISMOUNT_PENDING
#define VCB_DISMOUNT_PENDING
Definition: ext2fs.h:782
Ext2CompleteIrpContext
NTSTATUS Ext2CompleteIrpContext(IN PEXT2_IRP_CONTEXT IrpContext, IN NTSTATUS Status)
Definition: read.c:32
OldIrql
_Requires_lock_held_ Interrupt _Releases_lock_ Interrupt _In_ _IRQL_restores_ KIRQL OldIrql
Definition: kefuncs.h:803
Ext2TearDownStream
VOID Ext2TearDownStream(IN PEXT2_VCB Vcb)
Definition: memory.c:2786
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ULONG Type
Definition: ntfs.h:95
FSCTL_GET_RETRIEVAL_POINTERS
#define FSCTL_GET_RETRIEVAL_POINTERS
Definition: winioctl.h:95
PHANDLE
PVOID *typedef PHANDLE
Definition: ntsecpkg.h:414
VOID
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Definition: acefi.h:82
FCB_FILE_MODIFIED
#define FCB_FILE_MODIFIED
Definition: ext2fs.h:873
STATUS_NOT_A_REPARSE_POINT
#define STATUS_NOT_A_REPARSE_POINT
Definition: ntstatus.h:739
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#define LongToHandle(h)
Definition: basetsd.h:82
len
GLenum GLsizei len
Definition: glext.h:6722
Ccb
_Inout_ PFILE_OBJECT _In_ TYPE_OF_OPEN PFCB _In_opt_ PCCB Ccb
Definition: cdprocs.h:593
NewSize
_Must_inspect_result_ _In_ USHORT NewSize
Definition: fltkernel.h:975
EXT2_BUGCHK_FSCTL
#define EXT2_BUGCHK_FSCTL
Definition: ext2fs.h:323
_LIST_ENTRY
Definition: typedefs.h:117
FlagOn
#define FlagOn(_F, _SF)
Definition: ext2fs.h:179
FSCTL_REQUEST_OPLOCK_LEVEL_1
#define FSCTL_REQUEST_OPLOCK_LEVEL_1
Definition: nt_native.h:826
Size
IN PVOID IN PVOID IN USHORT IN USHORT Size
Definition: pci.h:359
IoGetNextIrpStackLocation
__drv_aliasesMem FORCEINLINE PIO_STACK_LOCATION IoGetNextIrpStackLocation(_In_ PIRP Irp)
Definition: iofuncs.h:2647
IoFileObjectType
POBJECT_TYPE IoFileObjectType
Definition: iomgr.c:36
_FCB::MainResource
ERESOURCE MainResource
Definition: ntfs.h:512
InputBufferLength
_Must_inspect_result_ _In_ PFILE_OBJECT _In_ ULONG _In_ ULONG InputBufferLength
Definition: fltkernel.h:1372
SYMLINK_FLAG_RELATIVE
#define SYMLINK_FLAG_RELATIVE
Definition: shellext.h:169
Ext2OEMToUnicode
NTSTATUS Ext2OEMToUnicode(IN PEXT2_VCB Vcb, IN OUT PUNICODE_STRING Oem, IN POEM_STRING Unicode)
Definition: misc.c:206
IO_TYPE_VPB
#define IO_TYPE_VPB
ClearFlag
ClearFlag(Dirent->Flags, DIRENT_FLAG_NOT_PERSISTENT)
VPB
struct _VPB VPB
PS_VCB
#define PS_VCB
Definition: common.h:17
Status
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Definition: gdiplustypes.h:24
Ext2RemoveVcb
VOID Ext2RemoveVcb(PEXT2_VCB Vcb)
Definition: memory.c:1939
DL_ERR
#define DL_ERR
Definition: ext2fs.h:1397
STARTING_VCN_INPUT_BUFFER
Definition: winioctl.h:544
_IO_STATUS_BLOCK
Definition: env_spec_w32.h:870
DeviceObject
IN PDEVICE_OBJECT DeviceObject
Definition: fatprocs.h:1560
_DISK_GEOMETRY
Definition: ntdddisk.h:371
ExAcquireSharedStarveExclusive
BOOLEAN NTAPI ExAcquireSharedStarveExclusive(IN PERESOURCE Resource, IN BOOLEAN Wait)
Definition: resource.c:1063
IoGetCurrentIrpStackLocation
__drv_aliasesMem FORCEINLINE PIO_STACK_LOCATION IoGetCurrentIrpStackLocation(_In_ PIRP Irp)
Definition: iofuncs.h:2745
IoDeleteDevice
VOID NTAPI IoDeleteDevice(IN PDEVICE_OBJECT DeviceObject)
Definition: device.c:1250
_UNICODE_STRING
Definition: env_spec_w32.h:368
DISK_GEOMETRY
struct _DISK_GEOMETRY DISK_GEOMETRY
Ext2IsVolumeMounted
NTSTATUS Ext2IsVolumeMounted(IN PEXT2_IRP_CONTEXT IrpContext)
Definition: fsctl.c:2494
REPARSE_DATA_BUFFER_HEADER_SIZE
#define REPARSE_DATA_BUFFER_HEADER_SIZE
Definition: iotypes.h:6842
Ext2NormalizeAndRaiseStatus
#define Ext2NormalizeAndRaiseStatus(IRPCONTEXT, STATUS)
Definition: ext2fs.h:263
SetFlag
#define SetFlag(_F, _SF)
Definition: ext2fs.h:187
_IO_STACK_LOCATION::FileObject
PFILE_OBJECT FileObject
Definition: iotypes.h:2812
_SEH2_END
_SEH2_END
Definition: create.c:4424
VCB_FLOPPY_DISK
#define VCB_FLOPPY_DISK
Definition: ext2fs.h:797
_REPARSE_DATA_BUFFER
Definition: shellext.h:140
KeInitializeEvent
#define KeInitializeEvent(pEvt, foo, foo2)
Definition: env_spec_w32.h:477
Ext2FlushFiles
NTSTATUS Ext2FlushFiles(IN PEXT2_IRP_CONTEXT IrpContext, IN PEXT2_VCB Vcb, IN BOOLEAN bShutDown)
Definition: flush.c:108
STATUS_BUFFER_OVERFLOW
#define STATUS_BUFFER_OVERFLOW
Definition: shellext.h:61
VPB_SIZE
#define VPB_SIZE
Definition: ext2fs.h:289
Ext2CanIWait
#define Ext2CanIWait()
Definition: ext2fs.h:1091
USHORT
unsigned short USHORT
Definition: pedump.c:61
Ext2RaiseStatus
#define Ext2RaiseStatus(IRPCONTEXT, STATUS)
Definition: ext2fs.h:258
Ext2UnlockVcb
NTSTATUS Ext2UnlockVcb(IN PEXT2_VCB Vcb, IN PFILE_OBJECT FileObject)
Definition: fsctl.c:206
FILE_NOTIFY_CHANGE_ATTRIBUTES
#define FILE_NOTIFY_CHANGE_ATTRIBUTES
InitializeListHead
#define InitializeListHead(ListHead)
Definition: env_spec_w32.h:944
IrpSp
_In_ PIO_STACK_LOCATION IrpSp
Definition: create.c:4157
Mcb
IN PVCB IN ULONG IN OUT PULONG IN BOOLEAN OUT PLARGE_MCB Mcb
Definition: fatprocs.h:334
Ext2IsHandleCountZero
BOOLEAN Ext2IsHandleCountZero(IN PEXT2_VCB Vcb)
Definition: fsctl.c:68
MainDeviceObject
static PDEVICE_OBJECT MainDeviceObject
Definition: IoDeviceObject_drv.c:34
SetLongFlag
#define SetLongFlag(_F, _SF)
Definition: ext2fs.h:253
ext2_sblock
Definition: ext2.h:69
Ext2UpdateGroupDirStat
NTSTATUS Ext2UpdateGroupDirStat(IN PEXT2_IRP_CONTEXT IrpContext, IN PEXT2_VCB Vcb, IN ULONG Group)
Definition: generic.c:1661
FIELD_OFFSET
#define FIELD_OFFSET(t, f)
Definition: typedefs.h:254
_SEH2_FINALLY
_SEH2_FINALLY
Definition: create.c:4395
Ext2MountVolume
NTSTATUS Ext2MountVolume(IN PEXT2_IRP_CONTEXT IrpContext)
Definition: fsctl.c:2050
PULONG
unsigned int * PULONG
Definition: retypes.h:1
FCB_PAGE_FILE
#define FCB_PAGE_FILE
Definition: ext2fs.h:872
IoCallDriver
NTSTATUS NTAPI IoCallDriver(IN PDEVICE_OBJECT DeviceObject, IN PIRP Irp)
Definition: irp.c:1218
FSCTL_IS_VOLUME_DIRTY
#define FSCTL_IS_VOLUME_DIRTY
Definition: winioctl.h:636
_DEVICE_OBJECT::Flags
ULONG Flags
Definition: env_spec_w32.h:419
_KEVENT
Definition: ketypes.h:799
ExAcquireResourceSharedLite
BOOLEAN NTAPI ExAcquireResourceSharedLite(IN PERESOURCE Resource, IN BOOLEAN Wait)
Definition: resource.c:885
Zero
IN PVCB IN VBO IN ULONG OUT PBCB OUT PVOID IN BOOLEAN IN BOOLEAN Zero
Definition: fatprocs.h:402
_LARGE_INTEGER
Definition: typedefs.h:100
FSCTL_IS_VOLUME_MOUNTED
#define FSCTL_IS_VOLUME_MOUNTED
Definition: nt_native.h:836
FsControlCode
_Must_inspect_result_ _In_ PFILE_OBJECT _In_ ULONG FsControlCode
Definition: fltkernel.h:1369
Vbn
_In_ LONGLONG Vbn
Definition: fsrtlfuncs.h:470
VCB_VOLUME_LOCKED
#define VCB_VOLUME_LOCKED
Definition: ext2fs.h:780
IoBuildDeviceIoControlRequest
PIRP NTAPI IoBuildDeviceIoControlRequest(IN ULONG IoControlCode, IN PDEVICE_OBJECT DeviceObject, IN PVOID InputBuffer, IN ULONG InputBufferLength, IN PVOID OutputBuffer, IN ULONG OutputBufferLength, IN BOOLEAN InternalDeviceIoControl, IN PKEVENT Event, IN PIO_STATUS_BLOCK IoStatusBlock)
Definition: irp.c:881
EXT2_UNLOAD_PENDING
#define EXT2_UNLOAD_PENDING
Definition: ext2fs.h:581
Ext2ReleaseFcb
VOID Ext2ReleaseFcb(IN PEXT2_FCB Fcb)
Definition: memory.c:276
_VPB
Definition: iotypes.h:166
Ext2QueryExtentMappings
NTSTATUS Ext2QueryExtentMappings(IN PEXT2_IRP_CONTEXT IrpContext, IN PEXT2_VCB Vcb, IN PEXT2_FCB Fcb, IN PLARGE_INTEGER RequestVbn, OUT PLARGE_INTEGER *pMappedRuns)
Definition: fsctl.c:670
OUT
#define OUT
Definition: typedefs.h:39
_VPB::VolumeLabelLength
USHORT VolumeLabelLength
Definition: iotypes.h:170
STATUS_VOLUME_DISMOUNTED
#define STATUS_VOLUME_DISMOUNTED
Definition: ntstatus.h:733
STATUS_NOT_LOCKED
#define STATUS_NOT_LOCKED
Definition: ntstatus.h:265
FSCTL_LOCK_VOLUME
#define FSCTL_LOCK_VOLUME
Definition: nt_native.h:832
IsExt2FsDevice
#define IsExt2FsDevice(DO)
Definition: ext2fs.h:607
_REPARSE_DATA_BUFFER::SubstituteNameOffset
USHORT SubstituteNameOffset
Definition: shellext.h:147
Ext2InitializeVcb
NTSTATUS Ext2InitializeVcb(PEXT2_IRP_CONTEXT IrpContext, PEXT2_VCB Vcb, PEXT2_SUPER_BLOCK Ext2Sb, PDEVICE_OBJECT TargetDevice, PDEVICE_OBJECT VolumeDevice, PVPB Vpb)
QuadPart
ret QuadPart
Definition: rtlfuncs.h:3091
IRP_MJ_SET_INFORMATION
#define IRP_MJ_SET_INFORMATION
Definition: rdpdr.c:49
ULONG
unsigned int ULONG
Definition: retypes.h:1
INODES_PER_GROUP
#define INODES_PER_GROUP
Definition: ext2fs.h:99
IoCreateDevice
NTSTATUS NTAPI IoCreateDevice(IN PDRIVER_OBJECT DriverObject, IN ULONG DeviceExtensionSize, IN PUNICODE_STRING DeviceName, IN DEVICE_TYPE DeviceType, IN ULONG DeviceCharacteristics, IN BOOLEAN Exclusive, OUT PDEVICE_OBJECT *DeviceObject)
Definition: device.c:1031
_FCB::PagingIoResource
ERESOURCE PagingIoResource
Definition: ntfs.h:511
EXT2_SB_MAGIC
#define EXT2_SB_MAGIC
Definition: ext2fs.h:297
MmGetSystemAddressForMdl
#define MmGetSystemAddressForMdl(Mdl)
RtlZeroMemory
#define RtlZeroMemory(Destination, Length)
Definition: typedefs.h:261
Ext2GetReparsePoint
NTSTATUS Ext2GetReparsePoint(IN PEXT2_IRP_CONTEXT IrpContext)
Definition: fsctl.c:1386
ULONG_PTR
#define ULONG_PTR
Definition: config.h:101
_FCB::Vcb
PVCB Vcb
Definition: cdstruc.h:939
DL_DBG
#define DL_DBG
Definition: ext2fs.h:1398
DbgBreak
#define DbgBreak()
Definition: ext2fs.h:46
Ext2FreePool
VOID Ext2FreePool(IN PVOID P, IN ULONG Tag)
Definition: debug.c:2697
IoSetHardErrorOrVerifyDevice
VOID NTAPI IoSetHardErrorOrVerifyDevice(IN PIRP Irp, IN PDEVICE_OBJECT DeviceObject)
Definition: util.c:316
IRP_MJ_WRITE
#define IRP_MJ_WRITE
Definition: rdpdr.c:47
PEXT2_VCB
struct _EXT2_VCB * PEXT2_VCB
Ext2SetFileType
NTSTATUS Ext2SetFileType(IN PEXT2_IRP_CONTEXT IrpContext, IN PEXT2_VCB Vcb, IN PEXT2_FCB Dcb, IN PEXT2_MCB Mcb, IN umode_t mode)
Definition: generic.c:1884
DEBUG
#define DEBUG(args)
Definition: rdesktop.h:129
_VPB::SerialNumber
ULONG SerialNumber
Definition: iotypes.h:173
_SEH2_EXCEPT
#define _SEH2_EXCEPT(...)
Definition: pseh2_64.h:6
Ext2DestroyExtentChain
VOID Ext2DestroyExtentChain(IN PEXT2_EXTENT Chain)
Definition: memory.c:546
FSCTL_SET_REPARSE_POINT
#define FSCTL_SET_REPARSE_POINT
Definition: winioctl.h:98
Ext2GetRetrievalPointers
NTSTATUS Ext2GetRetrievalPointers(IN PEXT2_IRP_CONTEXT IrpContext)
Definition: fsctl.c:911
PEXTENDED_IO_STACK_LOCATION
IO_STACK_LOCATION * PEXTENDED_IO_STACK_LOCATION
Definition: ext2fs.h:174
ExFreePoolWithTag
#define ExFreePoolWithTag(_P, _T)
Definition: module.h:1099
Ext2LockVcb
NTSTATUS Ext2LockVcb(IN PEXT2_VCB Vcb, IN PFILE_OBJECT FileObject)
Definition: fsctl.c:94
Ext2SetVpbFlag
VOID Ext2SetVpbFlag(IN PVPB Vpb, IN USHORT Flag)
Definition: fsctl.c:44
_SEH2_LEAVE
#define _SEH2_LEAVE
Definition: filesup.c:20
OemName
IN PDCB IN POEM_STRING OemName
Definition: fatprocs.h:1294
_IO_STACK_LOCATION::Parameters
struct _NAMED_PIPE_CREATE_PARAMETERS * Parameters
Definition: iotypes.h:2771
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_In_ PFCB Fcb
Definition: cdprocs.h:151
TargetDeviceObject
IN OUT PVCB IN PDEVICE_OBJECT TargetDeviceObject
Definition: fatprocs.h:1664
EXT4_EXTENTS_FL
#define EXT4_EXTENTS_FL
Definition: ext3_fs.h:263
STATUS_SUCCESS
return STATUS_SUCCESS
Definition: btrfs.c:2745
PEXT2_CCB
struct _EXT2_CCB * PEXT2_CCB
Ext2AllocatePool
PVOID Ext2AllocatePool(IN POOL_TYPE PoolType, IN SIZE_T NumberOfBytes, IN ULONG Tag)
Definition: debug.c:2684
memset
#define memset(x, y, z)
Definition: compat.h:39
VPB_MOUNTED
#define VPB_MOUNTED
Definition: iotypes.h:1763
status
static SERVICE_STATUS status
Definition: service.c:31
IO_REPARSE_TAG_SYMLINK
#define IO_REPARSE_TAG_SYMLINK
Definition: iotypes.h:6883
IoReleaseVpbSpinLock
VOID NTAPI IoReleaseVpbSpinLock(IN KIRQL Irql)
Definition: volume.c:1212
Ext2SaveInode
BOOLEAN Ext2SaveInode(IN PEXT2_IRP_CONTEXT IrpContext, IN PEXT2_VCB Vcb, IN struct inode *Inode)
Definition: generic.c:548
NTFSIDENTIFIER::Size
ULONG Size
Definition: ntfs.h:96
PLARGE_INTEGER
union _LARGE_INTEGER * PLARGE_INTEGER
Definition: file.c:85
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_Must_inspect_result_ _In_ PFILE_OBJECT _In_opt_ PLARGE_INTEGER _In_ ULONG _In_ FLT_IO_OPERATION_FLAGS _Out_opt_ PULONG BytesRead
Definition: fltkernel.h:1255
PREPARSE_DATA_BUFFER
struct _REPARSE_DATA_BUFFER * PREPARSE_DATA_BUFFER
Ext2GetUserBuffer
PVOID Ext2GetUserBuffer(IN PIRP Irp)
Definition: block.c:134
Vpb
IN OUT PVCB IN PDEVICE_OBJECT IN PVPB Vpb
Definition: fatprocs.h:1664
IOCTL_DISK_GET_DRIVE_GEOMETRY
#define IOCTL_DISK_GET_DRIVE_GEOMETRY
Definition: cdrw_usr.h:169
_EXT2_GLOBAL::Flags
ULONG Flags
Definition: ext2fs.h:514
Ext2VerifyVcb
VOID Ext2VerifyVcb(IN PEXT2_IRP_CONTEXT IrpContext, IN PEXT2_VCB Vcb)
Definition: fsctl.c:2277
FSCTL_QUERY_RETRIEVAL_POINTERS
#define FSCTL_QUERY_RETRIEVAL_POINTERS
Definition: nt_native.h:840
_LARGE_INTEGER::QuadPart
LONGLONG QuadPart
Definition: typedefs.h:112
STATUS_CANT_WAIT
#define STATUS_CANT_WAIT
Definition: ntstatus.h:438
STATUS_DEVICE_NOT_READY
#define STATUS_DEVICE_NOT_READY
Definition: shellext.h:65
status
Definition: ps.c:97