ReactOS  0.4.15-dev-309-g7c8d563
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
#define DO_DEVICE_INITIALIZING
Definition: env_spec_w32.h:399
PCHAR
signed char * PCHAR
Definition: retypes.h:7
PEXT2_FCB
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Ext2LoadSuper
NTSTATUS Ext2LoadSuper(IN PEXT2_VCB Vcb, IN BOOLEAN bVerify, OUT PEXT2_SUPER_BLOCK *Sb)
Definition: generic.c:25
Ext2ReadInode
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Definition: ext2.c:909
CcPurgeCacheSection
BOOLEAN NTAPI CcPurgeCacheSection(IN PSECTION_OBJECT_POINTERS SectionObjectPointer, IN OPTIONAL PLARGE_INTEGER FileOffset, IN ULONG Length, IN BOOLEAN UninitializeCacheMaps)
Definition: fssup.c:386
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GLsizei GLenum const GLvoid GLsizei GLenum GLbyte GLbyte GLbyte GLdouble GLdouble GLdouble GLfloat GLfloat GLfloat GLint GLint GLint GLshort GLshort GLshort GLubyte GLubyte GLubyte GLuint GLuint GLuint GLushort GLushort GLushort GLbyte GLbyte GLbyte GLbyte GLdouble GLdouble GLdouble GLdouble GLfloat GLfloat GLfloat GLfloat GLint GLint GLint GLint GLshort GLshort GLshort GLshort GLubyte GLubyte GLubyte GLubyte GLuint GLuint GLuint GLuint GLushort GLushort GLushort GLushort GLboolean const GLdouble const GLfloat const GLint const GLshort const GLbyte const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLdouble const GLfloat const GLfloat const GLint const GLint const GLshort const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort GLenum GLenum GLenum GLfloat GLenum GLint GLenum GLenum GLenum GLfloat GLenum GLenum GLint GLenum GLfloat GLenum GLint GLint GLushort GLenum GLenum GLfloat GLenum GLenum GLint GLfloat const GLubyte GLenum GLenum GLenum const GLfloat GLenum GLenum const GLint GLenum GLint GLint GLsizei GLsizei GLint GLenum GLenum const GLvoid GLenum GLenum const GLfloat GLenum GLenum const GLint GLenum GLenum const GLdouble GLenum GLenum const GLfloat GLenum GLenum const GLint GLsizei GLuint GLfloat GLuint GLbitfield GLfloat GLint GLuint GLboolean GLenum GLfloat GLenum GLbitfield GLenum GLfloat GLfloat GLint GLint const GLfloat GLenum GLfloat GLfloat GLint GLint GLfloat GLfloat GLint GLint const GLfloat GLint GLfloat GLfloat GLint GLfloat GLfloat GLint GLfloat GLfloat const GLdouble const GLfloat const GLdouble const GLfloat GLint i
Definition: glfuncs.h:248
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Definition: obref.c:496
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Definition: Header.h:8
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Definition: ext2fs.h:335
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Definition: iotypes.h:435
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Definition: write.c:652
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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
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Definition: shellext.h:188
NULL
smooth NULL
Definition: ftsmooth.c:416
INC_MEM_COUNT
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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:1780
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
Definition: iofuncs.h:713
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void * PVOID
Definition: retypes.h:9
_DEVICE_OBJECT
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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
#define SUPER_BLOCK
Definition: ext2fs.h:90
bVerify
static BOOL bVerify
Definition: verify.c:27
Ext2OEMToUnicodeSize
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FILE_DEVICE_DISK_FILE_SYSTEM
#define FILE_DEVICE_DISK_FILE_SYSTEM
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NTSTATUS NTAPI CcWaitForCurrentLazyWriterActivity(VOID)
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LONGLONG
int64_t LONGLONG
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_LIST_ENTRY::Flink
struct _LIST_ENTRY * Flink
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Handle
_In_ HANDLE Handle
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IRP_MN_USER_FS_REQUEST
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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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Definition: winioctl.h:99
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Definition: macro.lex.yy.c:714
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PEXT2_GLOBAL Ext2Global
Definition: init.c:16
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__wchar_t WCHAR
Definition: xmlstorage.h:180
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Definition: fsctl.c:296
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Definition: ntstatus.h:82
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Definition: ext2fs.h:1399
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Definition: section.c:4798
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#define FSCTL_REQUEST_OPLOCK_LEVEL_2
Definition: nt_native.h:827
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Definition: typedefs.h:51
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Definition: ext2fs.h:805
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IRP_MJ_FILE_SYSTEM_CONTROL
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_VPB::RealDevice
struct _DEVICE_OBJECT * RealDevice
Definition: iotypes.h:172
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#define Vcb
Definition: cdprocs.h:1425
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NTSTATUS Ext2InspectReparseData(IN PREPARSE_DATA_BUFFER RDB, IN ULONG InputBufferLength)
Definition: fsctl.c:1293
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#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
out
static FILE * out
Definition: regtests2xml.c:44
RETRIEVAL_POINTERS_BUFFER::Extents
struct RETRIEVAL_POINTERS_BUFFER::@3258 Extents[1]
HANDLE
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Definition: typedefs.h:72
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Definition: iotypes.h:2867
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#define Ext2ReferXcb(_C)
Definition: ext2fs.h:967
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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:1955
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:532
VCB_WRITE_PROTECTED
#define VCB_WRITE_PROTECTED
Definition: ext2fs.h:796
ExAllocatePoolWithTag
#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
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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:872
VCB_DISMOUNT_PENDING
#define VCB_DISMOUNT_PENDING
Definition: ext2fs.h:782
_REPARSE_DATA_BUFFER::SymbolicLinkReparseBuffer
struct _REPARSE_DATA_BUFFER::@311::@313 SymbolicLinkReparseBuffer
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:790
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:454
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:118
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:361
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:524
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:193
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
_IRP
Definition: Bus_PDO_QueryResourceRequirements.c:92
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:376
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:1251
_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:6843
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:2813
_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:164
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:66
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:101
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:40
_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:171
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:523
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
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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:2772
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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:3014
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:1764
status
static SERVICE_STATUS status
Definition: service.c:31
IO_REPARSE_TAG_SYMLINK
#define IO_REPARSE_TAG_SYMLINK
Definition: iotypes.h:6884
IoReleaseVpbSpinLock
VOID NTAPI IoReleaseVpbSpinLock(IN KIRQL Irql)
Definition: volume.c:1220
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:113
STATUS_CANT_WAIT
#define STATUS_CANT_WAIT
Definition: ntstatus.h:438
STATUS_DEVICE_NOT_READY
#define STATUS_DEVICE_NOT_READY
Definition: shellext.h:70
status
Definition: ps.c:97