ReactOS  0.4.15-dev-1197-g8081ba9
fastio.c
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1 /*
2  * COPYRIGHT: See COPYRIGHT.TXT
3  * PROJECT: Ext2 File System Driver for WinNT/2K/XP
4  * FILE: fastio.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 #define FASTIO_DEBUG_LEVEL DL_NVR
21 
22 
23 #ifdef ALLOC_PRAGMA
24 
25 #pragma alloc_text(PAGE, Ext2FastIoRead)
26 #pragma alloc_text(PAGE, Ext2FastIoWrite)
27 #pragma alloc_text(PAGE, Ext2FastIoCheckIfPossible)
28 #pragma alloc_text(PAGE, Ext2FastIoQueryBasicInfo)
29 #pragma alloc_text(PAGE, Ext2FastIoQueryStandardInfo)
30 #pragma alloc_text(PAGE, Ext2FastIoQueryNetworkOpenInfo)
31 #pragma alloc_text(PAGE, Ext2FastIoLock)
32 #pragma alloc_text(PAGE, Ext2FastIoUnlockSingle)
33 #pragma alloc_text(PAGE, Ext2FastIoUnlockAll)
34 #pragma alloc_text(PAGE, Ext2FastIoUnlockAll)
35 #endif
36 
37 FAST_IO_POSSIBLE
38 Ext2IsFastIoPossible(
39  IN PEXT2_FCB Fcb
40 )
41 {
42  FAST_IO_POSSIBLE IsPossible = FastIoIsNotPossible;
43 
44  if (!Fcb || !FsRtlOplockIsFastIoPossible(&Fcb->Oplock))
45  return IsPossible;
46 
47  IsPossible = FastIoIsQuestionable;
48 
49  if (!FsRtlAreThereCurrentFileLocks(&Fcb->FileLockAnchor)) {
50  if (!IsVcbReadOnly(Fcb->Vcb) && !FlagOn(Fcb->Vcb->Flags, VCB_VOLUME_LOCKED)) {
51  IsPossible = FastIoIsPossible;
52  }
53  }
54 
55  return IsPossible;
56 }
57 
58 
59 BOOLEAN NTAPI
60 Ext2FastIoCheckIfPossible (
61  IN PFILE_OBJECT FileObject,
62  IN PLARGE_INTEGER FileOffset,
63  IN ULONG Length,
64  IN BOOLEAN Wait,
65  IN ULONG LockKey,
66  IN BOOLEAN CheckForReadOperation,
67  OUT PIO_STATUS_BLOCK IoStatus,
68  IN PDEVICE_OBJECT DeviceObject
69 )
70 {
71  BOOLEAN bPossible = FastIoIsNotPossible;
72  PEXT2_FCB Fcb;
73  PEXT2_CCB Ccb;
74  LARGE_INTEGER lLength;
75 
76  lLength.QuadPart = Length;
77 
78  _SEH2_TRY {
79 
80  FsRtlEnterFileSystem();
81 
82  _SEH2_TRY {
83 
84  if (IsExt2FsDevice(DeviceObject)) {
85  _SEH2_LEAVE;
86  }
87 
88  Fcb = (PEXT2_FCB) FileObject->FsContext;
89  if (Fcb == NULL || Fcb->Identifier.Type == EXT2VCB) {
90  _SEH2_LEAVE;
91  }
92 
93  ASSERT((Fcb->Identifier.Type == EXT2FCB) &&
94  (Fcb->Identifier.Size == sizeof(EXT2_FCB)));
95 
96  /* do nothing if target fie was deleted */
97  if (FlagOn(Fcb->Flags, FCB_DELETE_PENDING)) {
98  _SEH2_LEAVE;
99  }
100 
101  if (IsDirectory(Fcb)) {
102  _SEH2_LEAVE;
103  }
104 
105  Ccb = (PEXT2_CCB) FileObject->FsContext2;
106  if (Ccb == NULL) {
107  _SEH2_LEAVE;
108  }
109 
110  if (CheckForReadOperation) {
111 
112  bPossible = FsRtlFastCheckLockForRead(
113  &Fcb->FileLockAnchor,
114  FileOffset,
115  &lLength,
116  LockKey,
117  FileObject,
118  PsGetCurrentProcess());
119 
120  } else {
121 
122  if (!IsVcbReadOnly(Fcb->Vcb)) {
123  bPossible = FsRtlFastCheckLockForWrite(
124  &Fcb->FileLockAnchor,
125  FileOffset,
126  &lLength,
127  LockKey,
128  FileObject,
129  PsGetCurrentProcess());
130  }
131  }
132 
133 #if EXT2_DEBUG
134  DEBUG(DL_INF, ("Ext2FastIIOCheckPossible: %s %s %wZ\n",
135  Ext2GetCurrentProcessName(),
136  "FASTIO_CHECK_IF_POSSIBLE",
137  &Fcb->Mcb->FullName
138  ));
139 
140  DEBUG(DL_INF, (
141  "Ext2FastIIOCheckPossible: Offset: %I64xg Length: %xh Key: %u %s %s\n",
142  FileOffset->QuadPart,
143  Length,
144  LockKey,
145  (CheckForReadOperation ? "CheckForReadOperation:" :
146  "CheckForWriteOperation:"),
147  (bPossible ? "Succeeded" : "Failed")));
148 #endif
149 
150  } _SEH2_EXCEPT (EXCEPTION_EXECUTE_HANDLER) {
151  bPossible = FastIoIsNotPossible;
152  } _SEH2_END;
153 
154  } _SEH2_FINALLY {
155 
156  FsRtlExitFileSystem();
157  } _SEH2_END;
158 
159  return bPossible;
160 }
161 
162 
163 BOOLEAN NTAPI
164 Ext2FastIoRead (IN PFILE_OBJECT FileObject,
165  IN PLARGE_INTEGER FileOffset,
166  IN ULONG Length,
167  IN BOOLEAN Wait,
168  IN ULONG LockKey,
169  OUT PVOID Buffer,
170  OUT PIO_STATUS_BLOCK IoStatus,
171  IN PDEVICE_OBJECT DeviceObject)
172 {
173  PEXT2_FCB Fcb;
174  BOOLEAN Status = FALSE;
175 
176  Fcb = (PEXT2_FCB) FileObject->FsContext;
177  if (Fcb == NULL) {
178  return FALSE;
179  }
180 
181  ASSERT((Fcb->Identifier.Type == EXT2FCB) &&
182  (Fcb->Identifier.Size == sizeof(EXT2_FCB)));
183 
184  Status = FsRtlCopyRead (
185  FileObject, FileOffset, Length, Wait,
186  LockKey, Buffer, IoStatus, DeviceObject);
187 
188  DEBUG(DL_IO, ("Ext2FastIoRead: %wZ Offset: %I64xh Length: %xh Key: %u Status: %d\n",
189  &Fcb->Mcb->ShortName, FileOffset->QuadPart, Length, LockKey, Status));
190 
191  return Status;
192 }
193 
194 BOOLEAN NTAPI
195 Ext2FastIoWrite (
196  IN PFILE_OBJECT FileObject,
197  IN PLARGE_INTEGER FileOffset,
198  IN ULONG Length,
199  IN BOOLEAN Wait,
200  IN ULONG LockKey,
201  OUT PVOID Buffer,
202  OUT PIO_STATUS_BLOCK IoStatus,
203  IN PDEVICE_OBJECT DeviceObject)
204 {
205  PEXT2_FCB Fcb = NULL;
206  BOOLEAN Status = FALSE;
207  BOOLEAN Locked = FALSE;
208 
209  Fcb = (PEXT2_FCB) FileObject->FsContext;
210  if (Fcb == NULL)
211  return FALSE;
212 
213  _SEH2_TRY {
214 
215  FsRtlEnterFileSystem();
216 
217  ASSERT((Fcb->Identifier.Type == EXT2FCB) &&
218  (Fcb->Identifier.Size == sizeof(EXT2_FCB)));
219 
220  if (IsVcbReadOnly(Fcb->Vcb)) {
221  _SEH2_LEAVE;
222  }
223 
224  if (!ExAcquireResourceSharedLite(Fcb->Header.Resource, Wait)) {
225  _SEH2_LEAVE;
226  }
227  Locked = TRUE;
228 
229  if (IsWritingToEof(*FileOffset) ||
230  Fcb->Header.ValidDataLength.QuadPart < FileOffset->QuadPart + Length ||
231  Fcb->Header.FileSize.QuadPart < FileOffset->QuadPart + Length ) {
232  Status = FALSE;
233  _SEH2_LEAVE;
234  }
235 
236  if (Locked) {
237  ExReleaseResourceLite(Fcb->Header.Resource);
238  Locked = FALSE;
239  }
240 
241  Status = FsRtlCopyWrite(FileObject, FileOffset, Length, Wait,
242  LockKey, Buffer, IoStatus, DeviceObject);
243  if (Status) {
244  if (IoStatus)
245  Length = (ULONG)IoStatus->Information;
246  }
247 
248  } _SEH2_FINALLY {
249 
250  if (Locked) {
251  ExReleaseResourceLite(Fcb->Header.Resource);
252  }
253 
254  FsRtlExitFileSystem();
255  } _SEH2_END;
256 
257  DEBUG(DL_IO, ("Ext2FastIoWrite: %wZ Offset: %I64xh Length: %xh Key: %xh Status=%d\n",
258  &Fcb->Mcb->ShortName, FileOffset->QuadPart, Length, LockKey, Status));
259 
260  return Status;
261 }
262 
263 BOOLEAN NTAPI
264 Ext2FastIoQueryBasicInfo (
265  IN PFILE_OBJECT FileObject,
266  IN BOOLEAN Wait,
267  OUT PFILE_BASIC_INFORMATION Buffer,
268  OUT PIO_STATUS_BLOCK IoStatus,
269  IN PDEVICE_OBJECT DeviceObject)
270 {
271  PEXT2_FCB Fcb = NULL;
272  PEXT2_CCB Ccb = NULL;
273  PEXT2_MCB Mcb = NULL;
274  BOOLEAN Status = FALSE;
275  BOOLEAN FcbMainResourceAcquired = FALSE;
276 
277  _SEH2_TRY {
278 
279  FsRtlEnterFileSystem();
280 
281  _SEH2_TRY {
282 
283  if (IsExt2FsDevice(DeviceObject)) {
284  IoStatus->Status = STATUS_INVALID_DEVICE_REQUEST;
285  _SEH2_LEAVE;
286  }
287 
288  Fcb = (PEXT2_FCB) FileObject->FsContext;
289  if (Fcb == NULL || Fcb->Identifier.Type == EXT2VCB) {
290  IoStatus->Status = STATUS_INVALID_PARAMETER;
291  _SEH2_LEAVE;
292  }
293  Ccb = (PEXT2_CCB) FileObject->FsContext2;
294  Mcb = Fcb->Mcb;
295  ASSERT((Fcb->Identifier.Type == EXT2FCB) &&
296  (Fcb->Identifier.Size == sizeof(EXT2_FCB)));
297 #if EXT2_DEBUG
298  DEBUG(DL_INF, (
299  "Ext2FastIoQueryBasicInfo: %s %s %wZ\n",
300  Ext2GetCurrentProcessName(),
301  "FASTIO_QUERY_BASIC_INFO",
302  &Fcb->Mcb->FullName
303  ));
304 #endif
305  if (!IsFlagOn(Fcb->Flags, FCB_PAGE_FILE)) {
306  if (!ExAcquireResourceSharedLite(
307  &Fcb->MainResource,
308  Wait)) {
309  _SEH2_LEAVE;
310  }
311  FcbMainResourceAcquired = TRUE;
312  }
313 
314  RtlZeroMemory(Buffer, sizeof(FILE_BASIC_INFORMATION));
315 
316  /*
317  typedef struct _FILE_BASIC_INFORMATION {
318  LARGE_INTEGER CreationTime;
319  LARGE_INTEGER LastAccessTime;
320  LARGE_INTEGER LastWriteTime;
321  LARGE_INTEGER ChangeTime;
322  ULONG FileAttributes;
323  } FILE_BASIC_INFORMATION, *PFILE_BASIC_INFORMATION;
324  */
325 
326  Buffer->CreationTime = Mcb->CreationTime;
327  Buffer->LastAccessTime = Mcb->LastAccessTime;
328  Buffer->LastWriteTime = Mcb->LastWriteTime;
329  Buffer->ChangeTime = Mcb->ChangeTime;
330  Buffer->FileAttributes = Mcb->FileAttr;
331  if (Buffer->FileAttributes == 0) {
332  Buffer->FileAttributes = FILE_ATTRIBUTE_NORMAL;
333  }
334 
335  IoStatus->Information = sizeof(FILE_BASIC_INFORMATION);
336  IoStatus->Status = STATUS_SUCCESS;
337 
338  Status = TRUE;
339 
340  } _SEH2_EXCEPT (EXCEPTION_EXECUTE_HANDLER) {
341  IoStatus->Status = _SEH2_GetExceptionCode();
342  } _SEH2_END;
343 
344  } _SEH2_FINALLY {
345 
346  if (FcbMainResourceAcquired) {
347  ExReleaseResourceLite(&Fcb->MainResource);
348  }
349 
350  FsRtlExitFileSystem();
351  } _SEH2_END;
352 
353 #if EXT2_DEBUG
354 
355  if (Status == FALSE) {
356 
357  DEBUG(DL_ERR, ("Ext2FastIoQueryBasicInfo: %s %s Status: FALSE ***\n",
358  Ext2GetCurrentProcessName(),
359  "FASTIO_QUERY_BASIC_INFO"));
360 
361  } else if (IoStatus->Status != STATUS_SUCCESS) {
362 
363  DEBUG(DL_ERR, (
364  "Ext2FastIoQueryBasicInfo: %s %s Status: %#x ***\n",
365  Ext2FastIoQueryBasicInfo,
366  "FASTIO_QUERY_BASIC_INFO",
367  IoStatus->Status
368  ));
369  }
370 #endif
371 
372  return Status;
373 }
374 
375 BOOLEAN NTAPI
376 Ext2FastIoQueryStandardInfo (
377  IN PFILE_OBJECT FileObject,
378  IN BOOLEAN Wait,
379  OUT PFILE_STANDARD_INFORMATION Buffer,
380  OUT PIO_STATUS_BLOCK IoStatus,
381  IN PDEVICE_OBJECT DeviceObject
382 )
383 {
384 
385  BOOLEAN Status = FALSE;
386  PEXT2_VCB Vcb = NULL;
387  PEXT2_FCB Fcb = NULL;
388  BOOLEAN FcbMainResourceAcquired = FALSE;
389 
390  _SEH2_TRY {
391 
392  FsRtlEnterFileSystem();
393 
394  _SEH2_TRY {
395 
396  if (IsExt2FsDevice(DeviceObject)) {
397  IoStatus->Status = STATUS_INVALID_DEVICE_REQUEST;
398  _SEH2_LEAVE;
399  }
400 
401  Fcb = (PEXT2_FCB) FileObject->FsContext;
402  if (Fcb == NULL || Fcb->Identifier.Type == EXT2VCB) {
403  IoStatus->Status = STATUS_INVALID_PARAMETER;
404  _SEH2_LEAVE;
405  }
406 
407  ASSERT((Fcb->Identifier.Type == EXT2FCB) &&
408  (Fcb->Identifier.Size == sizeof(EXT2_FCB)));
409 
410 #if EXT2_DEBUG
411  DEBUG(DL_INF, (
412  "Ext2FastIoQueryStandardInfo: %s %s %wZ\n",
413  Ext2GetCurrentProcessName(),
414  "FASTIO_QUERY_STANDARD_INFO",
415  &Fcb->Mcb->FullName ));
416 #endif
417  Vcb = Fcb->Vcb;
418 
419  if (!IsFlagOn(Fcb->Flags, FCB_PAGE_FILE)) {
420  if (!ExAcquireResourceSharedLite(
421  &Fcb->MainResource,
422  Wait )) {
423  _SEH2_LEAVE;
424  }
425  FcbMainResourceAcquired = TRUE;
426  }
427 
428  RtlZeroMemory(Buffer, sizeof(FILE_STANDARD_INFORMATION));
429 
430  /*
431  typedef struct _FILE_STANDARD_INFORMATION {
432  LARGE_INTEGER AllocationSize;
433  LARGE_INTEGER EndOfFile;
434  ULONG NumberOfLinks;
435  BOOLEAN DeletePending;
436  BOOLEAN Directory;
437  } FILE_STANDARD_INFORMATION, *PFILE_STANDARD_INFORMATION;
438  */
439 
440  Buffer->NumberOfLinks = Fcb->Inode->i_nlink;
441  Buffer->DeletePending = IsFlagOn(Fcb->Flags, FCB_DELETE_PENDING);
442 
443  if (IsDirectory(Fcb)) {
444  Buffer->Directory = IsDirectory(Fcb);
445  Buffer->AllocationSize.QuadPart = 0;
446  Buffer->EndOfFile.QuadPart = 0;
447  } else {
448  Buffer->Directory = FALSE;
449  Buffer->AllocationSize = Fcb->Header.AllocationSize;
450  Buffer->EndOfFile = Fcb->Header.FileSize;
451  }
452 
453  IoStatus->Information = sizeof(FILE_STANDARD_INFORMATION);
454  IoStatus->Status = STATUS_SUCCESS;
455 #if EXT2_DEBUG
456  DEBUG(DL_INF, ( "Ext2FastIoQueryStandInfo: AllocatieonSize = %I64xh FileSize = %I64xh\n",
457  Buffer->AllocationSize.QuadPart, Buffer->EndOfFile.QuadPart));
458 #endif
459  Status = TRUE;
460 
461  } _SEH2_EXCEPT (EXCEPTION_EXECUTE_HANDLER) {
462  IoStatus->Status = _SEH2_GetExceptionCode();
463  } _SEH2_END;
464 
465  } _SEH2_FINALLY {
466 
467  if (FcbMainResourceAcquired) {
468  ExReleaseResourceLite(&Fcb->MainResource);
469  }
470 
471  FsRtlExitFileSystem();
472  } _SEH2_END;
473 
474 #if EXT2_DEBUG
475  if (Status == FALSE) {
476  DEBUG(DL_INF, (
477  "Ext2FastIoQueryStandardInfo: %s %s Status: FALSE ***\n",
478  Ext2GetCurrentProcessName(),
479  "FASTIO_QUERY_STANDARD_INFO" ));
480  } else if (IoStatus->Status != STATUS_SUCCESS) {
481  DEBUG(DL_INF, (
482  "Ext2FastIoQueryStandardInfo: %s %s Status: %#x ***\n",
483  Ext2GetCurrentProcessName(),
484  "FASTIO_QUERY_STANDARD_INFO",
485  IoStatus->Status ));
486  }
487 #endif
488 
489  return Status;
490 }
491 
492 BOOLEAN NTAPI
493 Ext2FastIoLock (
494  IN PFILE_OBJECT FileObject,
495  IN PLARGE_INTEGER FileOffset,
496  IN PLARGE_INTEGER Length,
497  IN PEPROCESS Process,
498  IN ULONG Key,
499  IN BOOLEAN FailImmediately,
500  IN BOOLEAN ExclusiveLock,
501  OUT PIO_STATUS_BLOCK IoStatus,
502  IN PDEVICE_OBJECT DeviceObject
503 )
504 {
505  BOOLEAN Status = FALSE;
506  PEXT2_FCB Fcb;
507 
508  _SEH2_TRY {
509 
510  FsRtlEnterFileSystem();
511 
512  _SEH2_TRY {
513 
514  if (IsExt2FsDevice(DeviceObject)) {
515  IoStatus->Status = STATUS_INVALID_DEVICE_REQUEST;
516  _SEH2_LEAVE;
517  }
518 
519  Fcb = (PEXT2_FCB) FileObject->FsContext;
520  if (Fcb == NULL || Fcb->Identifier.Type == EXT2VCB) {
521  IoStatus->Status = STATUS_INVALID_PARAMETER;
522  _SEH2_LEAVE;
523  }
524 
525  ASSERT((Fcb->Identifier.Type == EXT2FCB) &&
526  (Fcb->Identifier.Size == sizeof(EXT2_FCB)));
527 
528  if (IsDirectory(Fcb)) {
529  DbgBreak();
530  IoStatus->Status = STATUS_INVALID_PARAMETER;
531  _SEH2_LEAVE;
532  }
533 #if EXT2_DEBUG
534  DEBUG(DL_INF, (
535  "Ext2FastIoLock: %s %s %wZ\n",
536  Ext2GetCurrentProcessName(),
537  "FASTIO_LOCK",
538  &Fcb->Mcb->FullName ));
539 
540  DEBUG(DL_INF, (
541  "Ext2FastIoLock: Offset: %I64xh Length: %I64xh Key: %u %s%s\n",
542  FileOffset->QuadPart,
543  Length->QuadPart,
544  Key,
545  (FailImmediately ? "FailImmediately " : ""),
546  (ExclusiveLock ? "ExclusiveLock " : "") ));
547 #endif
548 
549  if (!FsRtlOplockIsFastIoPossible(&Fcb->Oplock)) {
550  _SEH2_LEAVE;
551  }
552 
553  Status = FsRtlFastLock(
554  &Fcb->FileLockAnchor,
555  FileObject,
556  FileOffset,
557  Length,
558  Process,
559  Key,
560  FailImmediately,
561  ExclusiveLock,
562  IoStatus,
563  NULL,
564  FALSE);
565 
566  if (Status) {
567  Fcb->Header.IsFastIoPossible = Ext2IsFastIoPossible(Fcb);
568  }
569 
570  } _SEH2_EXCEPT (EXCEPTION_EXECUTE_HANDLER) {
571  IoStatus->Status = _SEH2_GetExceptionCode();
572  } _SEH2_END;
573 
574  } _SEH2_FINALLY {
575 
576  FsRtlExitFileSystem();
577  } _SEH2_END;
578 
579 #if EXT2_DEBUG
580  if (Status == FALSE) {
581  DEBUG(DL_ERR, (
582  "Ext2FastIoLock: %s %s *** Status: FALSE ***\n",
583  (PUCHAR) Process + ProcessNameOffset,
584  "FASTIO_LOCK"
585  ));
586  } else if (IoStatus->Status != STATUS_SUCCESS) {
587  DEBUG(DL_ERR, (
588  "Ext2FastIoLock: %s %s *** Status: %s (%#x) ***\n",
589  (PUCHAR) Process + ProcessNameOffset,
590  "FASTIO_LOCK",
591  Ext2NtStatusToString(IoStatus->Status),
592  IoStatus->Status
593  ));
594  }
595 #endif
596 
597  return Status;
598 }
599 
600 BOOLEAN NTAPI
601 Ext2FastIoUnlockSingle (
602  IN PFILE_OBJECT FileObject,
603  IN PLARGE_INTEGER FileOffset,
604  IN PLARGE_INTEGER Length,
605  IN PEPROCESS Process,
606  IN ULONG Key,
607  OUT PIO_STATUS_BLOCK IoStatus,
608  IN PDEVICE_OBJECT DeviceObject
609 )
610 {
611  BOOLEAN Status = FALSE;
612  PEXT2_FCB Fcb;
613 
614  _SEH2_TRY {
615 
616  FsRtlEnterFileSystem();
617 
618  _SEH2_TRY {
619 
620  if (IsExt2FsDevice(DeviceObject)) {
621  IoStatus->Status = STATUS_INVALID_DEVICE_REQUEST;
622  _SEH2_LEAVE;
623  }
624 
625  Fcb = (PEXT2_FCB) FileObject->FsContext;
626  if (Fcb == NULL || Fcb->Identifier.Type == EXT2VCB) {
627  DbgBreak();
628  IoStatus->Status = STATUS_INVALID_PARAMETER;
629  _SEH2_LEAVE;
630  }
631 
632  ASSERT((Fcb->Identifier.Type == EXT2FCB) &&
633  (Fcb->Identifier.Size == sizeof(EXT2_FCB)));
634 
635  if (IsDirectory(Fcb)) {
636  DbgBreak();
637  IoStatus->Status = STATUS_INVALID_PARAMETER;
638  _SEH2_LEAVE;
639  }
640 
641 #if EXT2_DEBUG
642  DEBUG(DL_INF, (
643  "Ext2FastIoUnlockSingle: %s %s %wZ\n",
644  (PUCHAR) Process + ProcessNameOffset,
645  "FASTIO_UNLOCK_SINGLE",
646  &Fcb->Mcb->FullName ));
647 
648  DEBUG(DL_INF, (
649  "Ext2FastIoUnlockSingle: Offset: %I64xh Length: %I64xh Key: %u\n",
650  FileOffset->QuadPart,
651  Length->QuadPart,
652  Key ));
653 #endif
654 
655  if (!FsRtlOplockIsFastIoPossible(&Fcb->Oplock)) {
656  _SEH2_LEAVE;
657  }
658 
659  IoStatus->Status = FsRtlFastUnlockSingle(
660  &Fcb->FileLockAnchor,
661  FileObject,
662  FileOffset,
663  Length,
664  Process,
665  Key,
666  NULL,
667  FALSE);
668 
669  IoStatus->Information = 0;
670  Status = TRUE;
671 
672  Fcb->Header.IsFastIoPossible = Ext2IsFastIoPossible(Fcb);
673 
674  } _SEH2_EXCEPT (EXCEPTION_EXECUTE_HANDLER) {
675  IoStatus->Status = _SEH2_GetExceptionCode();
676  } _SEH2_END;
677 
678  } _SEH2_FINALLY {
679 
680  FsRtlExitFileSystem();
681  } _SEH2_END;
682 
683 #if EXT2_DEBUG
684  if (Status == FALSE) {
685 
686  DEBUG(DL_ERR, (
687  "Ext2FastIoUnlockSingle: %s %s *** Status: FALSE ***\n",
688  (PUCHAR) Process + ProcessNameOffset,
689  "FASTIO_UNLOCK_SINGLE" ));
690  } else if (IoStatus->Status != STATUS_SUCCESS) {
691  DEBUG(DL_ERR, (
692  "Ext2FastIoUnlockSingle: %s %s *** Status: %s (%#x) ***\n",
693  (PUCHAR) Process + ProcessNameOffset,
694  "FASTIO_UNLOCK_SINGLE",
695  Ext2NtStatusToString(IoStatus->Status),
696  IoStatus->Status ));
697  }
698 #endif
699 
700  return Status;
701 }
702 
703 BOOLEAN NTAPI
704 Ext2FastIoUnlockAll (
705  IN PFILE_OBJECT FileObject,
706  IN PEPROCESS Process,
707  OUT PIO_STATUS_BLOCK IoStatus,
708  IN PDEVICE_OBJECT DeviceObject)
709 {
710  BOOLEAN Status = FALSE;
711  PEXT2_FCB Fcb;
712 
713  _SEH2_TRY {
714 
715  FsRtlEnterFileSystem();
716 
717  _SEH2_TRY {
718 
719  if (IsExt2FsDevice(DeviceObject)) {
720  IoStatus->Status = STATUS_INVALID_DEVICE_REQUEST;
721  _SEH2_LEAVE;
722  }
723 
724  Fcb = (PEXT2_FCB) FileObject->FsContext;
725  if (Fcb == NULL || Fcb->Identifier.Type == EXT2VCB) {
726  DbgBreak();
727  IoStatus->Status = STATUS_INVALID_PARAMETER;
728  _SEH2_LEAVE;
729  }
730 
731  ASSERT((Fcb->Identifier.Type == EXT2FCB) &&
732  (Fcb->Identifier.Size == sizeof(EXT2_FCB)));
733 
734  if (IsDirectory(Fcb)) {
735  DbgBreak();
736  IoStatus->Status = STATUS_INVALID_PARAMETER;
737  _SEH2_LEAVE;
738  }
739 #if EXT2_DEBUG
740  DEBUG(DL_INF, (
741  "Ext2FastIoUnlockSingle: %s %s %wZ\n",
742  (PUCHAR) Process + ProcessNameOffset,
743  "FASTIO_UNLOCK_ALL",
744  &Fcb->Mcb->FullName
745  ));
746 #endif
747 
748  if (!FsRtlOplockIsFastIoPossible(&Fcb->Oplock)) {
749  _SEH2_LEAVE;
750  }
751 
752  IoStatus->Status = FsRtlFastUnlockAll(
753  &Fcb->FileLockAnchor,
754  FileObject,
755  Process,
756  NULL );
757 
758  IoStatus->Information = 0;
759  Status = TRUE;
760 
761  Fcb->Header.IsFastIoPossible = Ext2IsFastIoPossible(Fcb);
762 
763  } _SEH2_EXCEPT (EXCEPTION_EXECUTE_HANDLER) {
764  IoStatus->Status = _SEH2_GetExceptionCode();
765  } _SEH2_END;
766 
767  } _SEH2_FINALLY {
768 
769  FsRtlExitFileSystem();
770  } _SEH2_END;
771 
772 #if EXT2_DEBUG
773  if (Status == FALSE) {
774 
775  DEBUG(DL_ERR, (
776  "Ext2FastIoUnlockSingle: %s %s *** Status: FALSE ***\n",
777  (PUCHAR) Process + ProcessNameOffset,
778  "FASTIO_UNLOCK_ALL"
779  ));
780  } else if (IoStatus->Status != STATUS_SUCCESS) {
781  DEBUG(DL_ERR, (
782  "Ext2FastIoUnlockSingle: %s %s *** Status: %s (%#x) ***\n",
783  (PUCHAR) Process + ProcessNameOffset,
784  "FASTIO_UNLOCK_ALL",
785  Ext2NtStatusToString(IoStatus->Status),
786  IoStatus->Status
787  ));
788  }
789 #endif
790 
791  return Status;
792 }
793 
794 BOOLEAN NTAPI
795 Ext2FastIoUnlockAllByKey (
796  IN PFILE_OBJECT FileObject,
797 #ifdef __REACTOS__
798  IN PVOID Process,
799 #else
800  IN PEPROCESS Process,
801 #endif
802  IN ULONG Key,
803  OUT PIO_STATUS_BLOCK IoStatus,
804  IN PDEVICE_OBJECT DeviceObject
805 )
806 {
807  BOOLEAN Status = FALSE;
808  PEXT2_FCB Fcb;
809 
810  _SEH2_TRY {
811 
812  FsRtlEnterFileSystem();
813 
814  _SEH2_TRY {
815 
816  if (IsExt2FsDevice(DeviceObject)) {
817  IoStatus->Status = STATUS_INVALID_DEVICE_REQUEST;
818  _SEH2_LEAVE;
819  }
820 
821  Fcb = (PEXT2_FCB) FileObject->FsContext;
822  if (Fcb == NULL || Fcb->Identifier.Type == EXT2VCB) {
823  DbgBreak();
824  IoStatus->Status = STATUS_INVALID_PARAMETER;
825  _SEH2_LEAVE;
826  }
827 
828  ASSERT((Fcb->Identifier.Type == EXT2FCB) &&
829  (Fcb->Identifier.Size == sizeof(EXT2_FCB)));
830 
831  if (IsDirectory(Fcb)) {
832  DbgBreak();
833  IoStatus->Status = STATUS_INVALID_PARAMETER;
834  _SEH2_LEAVE;
835  }
836 
837 #if EXT2_DEBUG
838  DEBUG(DL_INF, (
839  "Ext2FastIoUnlockAllByKey: %s %s %wZ\n",
840  (PUCHAR) Process + ProcessNameOffset,
841  "FASTIO_UNLOCK_ALL_BY_KEY",
842  &Fcb->Mcb->FullName
843  ));
844 
845  DEBUG(DL_INF, (
846  "Ext2FastIoUnlockAllByKey: Key: %u\n",
847  Key
848  ));
849 #endif
850 
851  if (!FsRtlOplockIsFastIoPossible(&Fcb->Oplock)) {
852  _SEH2_LEAVE;
853  }
854 
855  IoStatus->Status = FsRtlFastUnlockAllByKey(
856  &Fcb->FileLockAnchor,
857  FileObject,
858  Process,
859  Key,
860  NULL
861  );
862 
863  IoStatus->Information = 0;
864  Status = TRUE;
865 
866  Fcb->Header.IsFastIoPossible = Ext2IsFastIoPossible(Fcb);
867 
868  } _SEH2_EXCEPT (EXCEPTION_EXECUTE_HANDLER) {
869  IoStatus->Status = _SEH2_GetExceptionCode();
870  } _SEH2_END;
871 
872  } _SEH2_FINALLY {
873 
874  FsRtlExitFileSystem();
875  } _SEH2_END;
876 
877 #if EXT2_DEBUG
878  if (Status == FALSE) {
879 
880  DEBUG(DL_ERR, (
881  "Ext2FastIoUnlockAllByKey: %s %s *** Status: FALSE ***\n",
882  (PUCHAR) Process + ProcessNameOffset,
883  "FASTIO_UNLOCK_ALL_BY_KEY"
884  ));
885  } else if (IoStatus->Status != STATUS_SUCCESS) {
886 
887  DEBUG(DL_ERR, (
888  "Ext2FastIoUnlockAllByKey: %s %s *** Status: %s (%#x) ***\n",
889  (PUCHAR) Process + ProcessNameOffset,
890  "FASTIO_UNLOCK_ALL_BY_KEY",
891  Ext2NtStatusToString(IoStatus->Status),
892  IoStatus->Status
893  ));
894  }
895 #endif
896 
897  return Status;
898 }
899 
900 
901 BOOLEAN NTAPI
902 Ext2FastIoQueryNetworkOpenInfo (
903  IN PFILE_OBJECT FileObject,
904  IN BOOLEAN Wait,
905  IN OUT PFILE_NETWORK_OPEN_INFORMATION PFNOI,
906  OUT PIO_STATUS_BLOCK IoStatus,
907  IN PDEVICE_OBJECT DeviceObject
908 )
909 {
910  PEXT2_FCB Fcb = NULL;
911  PEXT2_CCB Ccb = NULL;
912  PEXT2_MCB Mcb = NULL;
913 
914  BOOLEAN bResult = FALSE;
915  BOOLEAN FcbResourceAcquired = FALSE;
916 
917  _SEH2_TRY {
918 
919  FsRtlEnterFileSystem();
920 
921  if (IsExt2FsDevice(DeviceObject)) {
922  IoStatus->Status = STATUS_INVALID_DEVICE_REQUEST;
923  _SEH2_LEAVE;
924  }
925 
926  Fcb = (PEXT2_FCB) FileObject->FsContext;
927  if (Fcb == NULL || Fcb->Identifier.Type == EXT2VCB) {
928  DbgBreak();
929  IoStatus->Status = STATUS_INVALID_PARAMETER;
930  _SEH2_LEAVE;
931  }
932 
933  ASSERT((Fcb->Identifier.Type == EXT2FCB) &&
934  (Fcb->Identifier.Size == sizeof(EXT2_FCB)));
935  Ccb = (PEXT2_CCB) FileObject->FsContext2;
936  Mcb = Fcb->Mcb;
937 
938 #if EXT2_DEBUG
939  DEBUG(DL_INF, (
940  "%-31s %wZ\n",
941  "FASTIO_QUERY_NETWORK_OPEN_INFO",
942  &Fcb->Mcb->FullName
943  ));
944 #endif
945 
946  if (!Ccb) {
947  _SEH2_LEAVE;
948  }
949 
950  if (!IsFlagOn(Fcb->Flags, FCB_PAGE_FILE)) {
951 
952  if (!ExAcquireResourceSharedLite(
953  &Fcb->MainResource,
954  Wait
955  )) {
956  _SEH2_LEAVE;
957  }
958 
959  FcbResourceAcquired = TRUE;
960  }
961 
962  if (IsDirectory(Fcb)) {
963  PFNOI->AllocationSize.QuadPart = 0;
964  PFNOI->EndOfFile.QuadPart = 0;
965  } else {
966  PFNOI->AllocationSize = Fcb->Header.AllocationSize;
967  PFNOI->EndOfFile = Fcb->Header.FileSize;
968  }
969 
970  PFNOI->FileAttributes = Mcb->FileAttr;
971  if (PFNOI->FileAttributes == 0) {
972  PFNOI->FileAttributes = FILE_ATTRIBUTE_NORMAL;
973  }
974 
975  PFNOI->CreationTime = Mcb->CreationTime;
976  PFNOI->LastAccessTime = Mcb->LastAccessTime;
977  PFNOI->LastWriteTime = Mcb->LastWriteTime;
978  PFNOI->ChangeTime = Mcb->ChangeTime;
979 
980  bResult = TRUE;
981 
982  IoStatus->Status = STATUS_SUCCESS;
983  IoStatus->Information = sizeof(FILE_NETWORK_OPEN_INFORMATION);
984 
985  } _SEH2_FINALLY {
986 
987  if (FcbResourceAcquired) {
988  ExReleaseResourceLite(&Fcb->MainResource);
989  }
990 
991  FsRtlExitFileSystem();
992  } _SEH2_END;
993 
994  return bResult;
995 }
996 
997 
998 VOID NTAPI
999 Ext2AcquireForCreateSection (
1000  IN PFILE_OBJECT FileObject
1001 )
1002 
1003 {
1004  PEXT2_FCB Fcb = FileObject->FsContext;
1005 
1006  if (Fcb->Header.Resource != NULL) {
1007  ExAcquireResourceExclusiveLite(Fcb->Header.Resource, TRUE);
1008  }
1009 
1010  DEBUG(FASTIO_DEBUG_LEVEL, ("Ext2AcquireForCreateSection: Fcb=%p\n", Fcb));
1011 }
1012 
1013 VOID NTAPI
1014 Ext2ReleaseForCreateSection (
1015  IN PFILE_OBJECT FileObject
1016 )
1017 {
1018  PEXT2_FCB Fcb = FileObject->FsContext;
1019 
1020  DEBUG(FASTIO_DEBUG_LEVEL, ("Ext2ReleaseForCreateSection: Fcb=%p\n", Fcb));
1021 
1022  if (Fcb->Header.Resource != NULL) {
1023  ExReleaseResourceLite(Fcb->Header.Resource);
1024  }
1025 }
1026 
1027 
1028 NTSTATUS NTAPI
1029 Ext2AcquireFileForModWrite (
1030  IN PFILE_OBJECT FileObject,
1031  IN PLARGE_INTEGER EndingOffset,
1032  OUT PERESOURCE *ResourceToRelease,
1033  IN PDEVICE_OBJECT DeviceObject
1034 )
1035 
1036 {
1037  BOOLEAN ResourceAcquired = FALSE;
1038 
1039  PEXT2_FCB Fcb = FileObject->FsContext;
1040 
1041  *ResourceToRelease = Fcb->Header.Resource;
1042  ResourceAcquired = ExAcquireResourceExclusiveLite(*ResourceToRelease, FALSE);
1043  if (!ResourceAcquired) {
1044  *ResourceToRelease = NULL;
1045  }
1046 
1047  DEBUG(FASTIO_DEBUG_LEVEL, ("Ext2AcquireFileForModWrite: Fcb=%p Acquired=%d\n",
1048  Fcb, ResourceAcquired));
1049 
1050  return (ResourceAcquired ? STATUS_SUCCESS : STATUS_CANT_WAIT);
1051 }
1052 
1053 NTSTATUS NTAPI
1054 Ext2ReleaseFileForModWrite (
1055  IN PFILE_OBJECT FileObject,
1056  IN PERESOURCE ResourceToRelease,
1057  IN PDEVICE_OBJECT DeviceObject
1058 )
1059 {
1060  PEXT2_FCB Fcb = FileObject->FsContext;
1061 
1062  DEBUG(FASTIO_DEBUG_LEVEL, ("Ext2ReleaseFileForModWrite: Fcb=%p\n", Fcb));
1063 
1064  if (ResourceToRelease != NULL) {
1065  ASSERT(ResourceToRelease == Fcb->Header.Resource);
1066  ExReleaseResourceLite(ResourceToRelease);
1067  } else {
1068  DbgBreak();
1069  }
1070 
1071  return STATUS_SUCCESS;
1072 }
1073 
1074 NTSTATUS NTAPI
1075 Ext2AcquireFileForCcFlush (
1076  IN PFILE_OBJECT FileObject,
1077  IN PDEVICE_OBJECT DeviceObject
1078 )
1079 {
1080  PEXT2_FCB Fcb = FileObject->FsContext;
1081 
1082  if (Fcb->Header.Resource != NULL) {
1083  ExAcquireResourceExclusiveLite(Fcb->Header.Resource, TRUE);
1084  }
1085 
1086  DEBUG(FASTIO_DEBUG_LEVEL, ("Ext2AcquireFileForCcFlush: Fcb=%p\n", Fcb));
1087 
1088  return STATUS_SUCCESS;
1089 }
1090 
1091 NTSTATUS NTAPI
1092 Ext2ReleaseFileForCcFlush (
1093  IN PFILE_OBJECT FileObject,
1094  IN PDEVICE_OBJECT DeviceObject
1095 )
1096 {
1097  PEXT2_FCB Fcb = FileObject->FsContext;
1098 
1099  DEBUG(FASTIO_DEBUG_LEVEL, ("Ext2ReleaseFileForCcFlush: Fcb=%p\n", Fcb));
1100 
1101  if (Fcb->Header.Resource != NULL) {
1102  ExReleaseResourceLite(Fcb->Header.Resource);
1103  }
1104 
1105  return STATUS_SUCCESS;
1106 }
1107 
1108 
1109 NTSTATUS NTAPI
1110 Ext2PreAcquireForCreateSection(
1111  IN PFS_FILTER_CALLBACK_DATA cd,
1112  OUT PVOID *cc
1113  )
1114 {
1115  PEXT2_FCB Fcb = (PEXT2_FCB)cd->FileObject->FsContext;
1116  NTSTATUS status;
1117 
1118  ASSERT(cd->Operation == FS_FILTER_ACQUIRE_FOR_SECTION_SYNCHRONIZATION);
1119  ExAcquireResourceExclusiveLite(Fcb->Header.Resource, TRUE);
1120  if (cd->Parameters.AcquireForSectionSynchronization.SyncType != SyncTypeCreateSection) {
1121  status = STATUS_FSFILTER_OP_COMPLETED_SUCCESSFULLY;
1122  } else if (Fcb->ShareAccess.Writers == 0) {
1123  status = STATUS_FILE_LOCKED_WITH_ONLY_READERS;
1124  } else {
1125  status = STATUS_FILE_LOCKED_WITH_WRITERS;
1126  }
1127 
1128  return status;
1129 }
Ext2AcquireForCreateSection
VOID NTAPI Ext2AcquireForCreateSection(IN PFILE_OBJECT FileObject)
Definition: fastio.c:999
PEXT2_FCB
struct _EXT2_FCB * PEXT2_FCB
EndingOffset
_In_ PLARGE_INTEGER EndingOffset
Definition: iotypes.h:1577
FS_FILTER_ACQUIRE_FOR_SECTION_SYNCHRONIZATION
#define FS_FILTER_ACQUIRE_FOR_SECTION_SYNCHRONIZATION
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IN
#define IN
Definition: typedefs.h:39
Ext2IsFastIoPossible
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Ext2PreAcquireForCreateSection
NTSTATUS NTAPI Ext2PreAcquireForCreateSection(IN PFS_FILTER_CALLBACK_DATA cd, OUT PVOID *cc)
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Definition: ext2fs.h:996
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FsRtlFastCheckLockForRead
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Definition: filelock.c:752
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NTSTATUS NTAPI Ext2ReleaseFileForCcFlush(IN PFILE_OBJECT FileObject, IN PDEVICE_OBJECT DeviceObject)
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IN PLARGE_INTEGER IN ULONG IN BOOLEAN IN ULONG IN BOOLEAN OUT PIO_STATUS_BLOCK IoStatus
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Ext2FastIoUnlockSingle
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PEXT2_GLOBAL Ext2Global
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Ext2FastIoQueryNetworkOpenInfo
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Definition: ext2fs.h:1413
FCB_PAGE_FILE
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Definition: ext2fs.h:872
Ext2NtStatusToString
PUCHAR Ext2NtStatusToString(IN NTSTATUS Status)
Ext2FastIoWrite
BOOLEAN NTAPI Ext2FastIoWrite(IN PFILE_OBJECT FileObject, IN PLARGE_INTEGER FileOffset, IN ULONG Length, IN BOOLEAN Wait, IN ULONG LockKey, OUT PVOID Buffer, OUT PIO_STATUS_BLOCK IoStatus, IN PDEVICE_OBJECT DeviceObject)
Definition: fastio.c:195
ExclusiveLock
IN PLARGE_INTEGER IN PLARGE_INTEGER PEPROCESS ULONG BOOLEAN BOOLEAN ExclusiveLock
Definition: fatprocs.h:2706
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BOOLEAN NTAPI ExAcquireResourceSharedLite(IN PERESOURCE Resource, IN BOOLEAN Wait)
Definition: resource.c:885
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Definition: typedefs.h:102
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#define VCB_VOLUME_LOCKED
Definition: ext2fs.h:780
FsRtlCopyRead
BOOLEAN NTAPI FsRtlCopyRead(IN PFILE_OBJECT FileObject, IN PLARGE_INTEGER FileOffset, IN ULONG Length, IN BOOLEAN Wait, IN ULONG LockKey, OUT PVOID Buffer, OUT PIO_STATUS_BLOCK IoStatus, IN PDEVICE_OBJECT DeviceObject)
Definition: fastio.c:64
FsRtlCopyWrite
BOOLEAN NTAPI FsRtlCopyWrite(IN PFILE_OBJECT FileObject, IN PLARGE_INTEGER FileOffset, IN ULONG Length, IN BOOLEAN Wait, IN ULONG LockKey, OUT PVOID Buffer, OUT PIO_STATUS_BLOCK IoStatus, IN PDEVICE_OBJECT DeviceObject)
Definition: fastio.c:264
_FILE_BASIC_INFORMATION
Definition: nt_native.h:938
Process
_Must_inspect_result_ _In_ PLARGE_INTEGER _In_ PLARGE_INTEGER _In_ ULONG _In_ PFILE_OBJECT _In_ PVOID Process
Definition: fsrtlfuncs.h:219
OUT
#define OUT
Definition: typedefs.h:40
STATUS_FILE_LOCKED_WITH_WRITERS
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Definition: ntstatus.h:112
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Definition: ext2fs.h:607
ULONG
unsigned int ULONG
Definition: retypes.h:1
Ext2FastIoRead
BOOLEAN NTAPI Ext2FastIoRead(IN PFILE_OBJECT FileObject, IN PLARGE_INTEGER FileOffset, IN ULONG Length, IN BOOLEAN Wait, IN ULONG LockKey, OUT PVOID Buffer, OUT PIO_STATUS_BLOCK IoStatus, IN PDEVICE_OBJECT DeviceObject)
Definition: fastio.c:164
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#define RtlZeroMemory(Destination, Length)
Definition: typedefs.h:262
_FCB::Vcb
PVCB Vcb
Definition: cdstruc.h:939
DbgBreak
#define DbgBreak()
Definition: ext2fs.h:46
STATUS_FSFILTER_OP_COMPLETED_SUCCESSFULLY
#define STATUS_FSFILTER_OP_COMPLETED_SUCCESSFULLY
Definition: ntstatus.h:110
DEBUG
#define DEBUG(args)
Definition: rdesktop.h:129
_SEH2_EXCEPT
#define _SEH2_EXCEPT(...)
Definition: pseh2_64.h:6
_SEH2_GetExceptionCode
#define _SEH2_GetExceptionCode()
Definition: pseh2_64.h:12
_SEH2_LEAVE
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Definition: filesup.c:20
Fcb
_In_ PFCB Fcb
Definition: cdprocs.h:159
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Definition: btrfs.c:3014
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struct _EXT2_CCB * PEXT2_CCB
status
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Definition: service.c:31
FsRtlFastLock
#define FsRtlFastLock(A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11)
Definition: fsrtlfuncs.h:1581
FsRtlFastCheckLockForWrite
BOOLEAN NTAPI FsRtlFastCheckLockForWrite(IN PFILE_LOCK FileLock, IN PLARGE_INTEGER FileOffset, IN PLARGE_INTEGER Length, IN ULONG Key, IN PFILE_OBJECT FileObject, IN PVOID Process)
Definition: filelock.c:786
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ULONG Size
Definition: ntfs.h:96
FsRtlOplockIsFastIoPossible
BOOLEAN NTAPI FsRtlOplockIsFastIoPossible(IN POPLOCK Oplock)
Definition: oplock.c:1566
_LARGE_INTEGER::QuadPart
LONGLONG QuadPart
Definition: typedefs.h:114
STATUS_CANT_WAIT
#define STATUS_CANT_WAIT
Definition: ntstatus.h:452
Wait
IN BOOLEAN Wait
Definition: fatprocs.h:1538
FILE_BASIC_INFORMATION
#define FILE_BASIC_INFORMATION
Definition: disk.h:53
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Definition: ps.c:97