ReactOS  0.4.15-dev-1647-g91fceab
rfsd.c
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1 /*
2  * COPYRIGHT: GNU GENERAL PUBLIC LICENSE VERSION 2
3  * PROJECT: ReiserFs file system driver for Windows NT/2000/XP/Vista.
4  * FILE: rfsd.c
5  * PURPOSE:
6  * PROGRAMMER: Mark Piper, Matt Wu, Bo Brantén.
7  * HOMEPAGE:
8  * UPDATE HISTORY:
9  */
10 
11 /* INCLUDES *****************************************************************/
12 
13 #include "rfsd.h"
14 
15 // TODO: turn off (turns off warning about returning without return value, so I could easily disable code sections)
16 #ifdef _MSC_VER
17 #pragma warning(disable : 4716)
18 #endif
19 
20 /* GLOBALS ***************************************************************/
21 
22 extern PRFSD_GLOBAL RfsdGlobal;
23 
24 /* DEFINITIONS *************************************************************/
25 
26 #ifdef ALLOC_PRAGMA
27 #pragma alloc_text(PAGE, RfsdLoadSuper)
28 #pragma alloc_text(PAGE, RfsdSaveSuper)
29 
30 #pragma alloc_text(PAGE, RfsdLoadGroup)
31 #pragma alloc_text(PAGE, RfsdSaveGroup)
32 
33 #pragma alloc_text(PAGE, RfsdLoadInode)
34 #pragma alloc_text(PAGE, RfsdSaveInode)
35 
36 #pragma alloc_text(PAGE, RfsdLoadBlock)
37 #pragma alloc_text(PAGE, RfsdSaveBlock)
38 
39 #pragma alloc_text(PAGE, RfsdSaveBuffer)
40 
41 #pragma alloc_text(PAGE, RfsdGetBlock)
42 #pragma alloc_text(PAGE, RfsdBlockMap)
43 
44 #pragma alloc_text(PAGE, RfsdBuildBDL)
45 #pragma alloc_text(PAGE, RfsdBuildBDL2)
46 
47 #pragma alloc_text(PAGE, RfsdNewBlock)
48 #pragma alloc_text(PAGE, RfsdFreeBlock)
49 
50 #pragma alloc_text(PAGE, RfsdExpandBlock)
51 #pragma alloc_text(PAGE, RfsdExpandInode)
52 
53 #pragma alloc_text(PAGE, RfsdNewInode)
54 #pragma alloc_text(PAGE, RfsdFreeInode)
55 
56 #pragma alloc_text(PAGE, RfsdAddEntry)
57 #pragma alloc_text(PAGE, RfsdRemoveEntry)
58 
59 #pragma alloc_text(PAGE, RfsdTruncateBlock)
60 #pragma alloc_text(PAGE, RfsdTruncateInode)
61 
62 #pragma alloc_text(PAGE, RfsdAddMcbEntry)
63 #pragma alloc_text(PAGE, RfsdRemoveMcbEntry)
64 #pragma alloc_text(PAGE, RfsdLookupMcbEntry)
65 
66 #pragma alloc_text(PAGE, SuperblockContainsMagicKey)
67 #pragma alloc_text(PAGE, DetermineOnDiskKeyFormat)
68 #pragma alloc_text(PAGE, FillInMemoryKey)
69 #pragma alloc_text(PAGE, CompareShortKeys)
70 #pragma alloc_text(PAGE, CompareKeysWithoutOffset)
71 #pragma alloc_text(PAGE, CompareKeys)
72 #pragma alloc_text(PAGE, NavigateToLeafNode)
73 #pragma alloc_text(PAGE, _NavigateToLeafNode)
74 #pragma alloc_text(PAGE, RfsdParseFilesystemTree)
75 #endif
76 
77 /* FUNCTIONS ***************************************************************/
78 
79 PRFSD_SUPER_BLOCK
80 RfsdLoadSuper(IN PRFSD_VCB Vcb,
81  IN BOOLEAN bVerify )
82 {
83  NTSTATUS Status;
84  PRFSD_SUPER_BLOCK RfsdSb = NULL;
85 
86  PAGED_CODE();
87 
88  RfsdSb = (PRFSD_SUPER_BLOCK) ExAllocatePoolWithTag(PagedPool,
89  SUPER_BLOCK_SIZE, RFSD_POOL_TAG);
90  if (!RfsdSb) {
91  return NULL;
92  }
93 
94  Status = RfsdReadDisk(
95  Vcb,
96  (ULONGLONG) SUPER_BLOCK_OFFSET,
97  SUPER_BLOCK_SIZE,
98  (PVOID) RfsdSb,
99  bVerify );
100 
101  if (!NT_SUCCESS(Status)) {
102 
103  RfsdPrint((DBG_ERROR, "RfsdReadDisk: Read Block Device error.\n"));
104 
105  ExFreePool(RfsdSb);
106  return NULL;
107  }
108 
109  return RfsdSb;
110 }
111 
112 #if 0
113 
114 BOOLEAN
115 RfsdSaveSuper( IN PRFSD_IRP_CONTEXT IrpContext,
116  IN PRFSD_VCB Vcb )
117 {
118 DbgBreak();
119 #if DISABLED
120  LONGLONG Offset;
121  BOOLEAN bRet;
122 
123  Offset = (LONGLONG) SUPER_BLOCK_OFFSET;
124 
125  bRet = RfsdSaveBuffer( IrpContext,
126  Vcb,
127  Offset,
128  SUPER_BLOCK_SIZE,
129  Vcb->SuperBlock );
130 
131  if (IsFlagOn(Vcb->Flags, VCB_FLOPPY_DISK)) {
132  RfsdStartFloppyFlushDpc(Vcb, NULL, NULL);
133  }
134 
135  return bRet;
136 #endif
137 }
138 
139 #if DISABLED
140 BOOLEAN
141 RfsdLoadGroup(IN PRFSD_VCB Vcb)
142 {
143  ULONG Size;
144  PVOID Buffer;
145  LONGLONG Lba;
146  NTSTATUS Status;
147 
148  PRFSD_SUPER_BLOCK sb;
149 
150  sb = Vcb->SuperBlock;
151 
152  Vcb->BlockSize = RFSD_MIN_BLOCK << sb->s_log_block_size;
153  Vcb->SectorBits = RfsdLog2(SECTOR_SIZE);
154  ASSERT(BLOCK_BITS == RfsdLog2(BLOCK_SIZE));
155 
156  Vcb->NumOfGroups = (sb->s_blocks_count - sb->s_first_data_block +
157  sb->s_blocks_per_group - 1) / sb->s_blocks_per_group;
158 
159  Size = sizeof(RFSD_GROUP_DESC) * Vcb->NumOfGroups;
160 
161  if (Vcb->BlockSize == RFSD_MIN_BLOCK) {
162  Lba = (LONGLONG)2 * Vcb->BlockSize;
163  }
164 
165  if (Vcb->BlockSize > RFSD_MIN_BLOCK) {
166  Lba = (LONGLONG) (Vcb->BlockSize);
167  }
168 
169  if (Lba == 0) {
170  return FALSE;
171  }
172 
173  Buffer = ExAllocatePoolWithTag(PagedPool, Size, RFSD_POOL_TAG);
174  if (!Buffer) {
175  RfsdPrint((DBG_ERROR, "RfsdLoadSuper: no enough memory.\n"));
176  return FALSE;
177  }
178 
179  RfsdPrint((DBG_USER, "RfsdLoadGroup: Lba=%I64xh Size=%xh\n", Lba, Size));
180 
181  Status = RfsdReadDisk( Vcb,
182  Lba,
183  Size,
184  Buffer,
185  FALSE );
186 
187  if (!NT_SUCCESS(Status)) {
188  ExFreePool(Buffer);
189  Buffer = NULL;
190 
191  return FALSE;
192  }
193 
194 /*
195  bPinned = CcPinRead(
196  Vcb->StreamObj,
197  Lba,
198  Size,
199  PIN_WAIT,
200  &(Vcb->GroupDescBcb),
201  &(Buffer));
202 
203  if (!bPinned)
204  {
205  Vcb->GroupDesc = NULL;
206  return FALSE;
207  }
208 */
209 
210  Vcb->GroupDesc = (PRFSD_GROUP_DESC) Buffer;
211 
212  return TRUE;
213 }
214 
215 BOOLEAN
216 RfsdSaveGroup( IN PRFSD_IRP_CONTEXT IrpContext,
217  IN PRFSD_VCB Vcb,
218  IN ULONG Group )
219 {
220  LONGLONG Offset;
221  BOOLEAN bRet;
222 
223  if (Vcb->BlockSize == RFSD_MIN_BLOCK) {
224 
225  Offset = (LONGLONG) (2 * Vcb->BlockSize);
226 
227  } else {
228 
229  Offset = (LONGLONG) (Vcb->BlockSize);
230  }
231 
232  Offset += ((LONGLONG) sizeof(struct rfsd_group_desc) * Group);
233 
234  bRet = RfsdSaveBuffer(
235  IrpContext,
236  Vcb,
237  Offset,
238  sizeof(struct rfsd_group_desc),
239  &(Vcb->GroupDesc[Group]) );
240 
241  if (IsFlagOn(Vcb->Flags, VCB_FLOPPY_DISK)) {
242  RfsdStartFloppyFlushDpc(Vcb, NULL, NULL);
243  }
244 
245  return bRet;
246 }
247 #endif
248 
249 #endif // 0
250 
252 BOOLEAN
253 RfsdLoadInode (IN PRFSD_VCB Vcb,
254  IN PRFSD_KEY_IN_MEMORY pKey,
255  IN OUT PRFSD_INODE Inode)
256 {
257  NTSTATUS Status;
258 
259  PRFSD_ITEM_HEAD pItemHeader = NULL;
260  PUCHAR pItemBuffer = NULL;
261  PUCHAR pBlockBuffer = NULL;
262 
263  // Crate the target key for the stat item (stat items always have an offset of 0)
264  RFSD_KEY_IN_MEMORY TargetKey;
265 
266  PAGED_CODE();
267 
268  TargetKey = *pKey;
269  TargetKey.k_offset = 0x0;
270  TargetKey.k_type = RFSD_KEY_TYPE_v2_STAT_DATA;
271 
272  RfsdPrint((DBG_FUNC, /*__FUNCTION__*/ "on %i, %i\n", TargetKey.k_dir_id, TargetKey.k_objectid));
273 
274  //Load the stat data
275  Status = RfsdLoadItem(Vcb, &TargetKey,
276  &(pItemHeader), &(pItemBuffer), &(pBlockBuffer), NULL, //<
277  &CompareKeys
278  );
279  if (!NT_SUCCESS(Status))
280  { if (pBlockBuffer) {ExFreePool(pBlockBuffer);} return FALSE; }
281 
282  // Copy the item into the inode / stat data structure
283  RtlCopyMemory(Inode, pItemBuffer, sizeof(RFSD_INODE));
284 
285  // Cleanup
286  if (pBlockBuffer)
287  ExFreePool(pBlockBuffer);
288 
289  return TRUE;
290 }
291 
292 #if 0
293 
294 BOOLEAN
295 RfsdSaveInode ( IN PRFSD_IRP_CONTEXT IrpContext,
296  IN PRFSD_VCB Vcb,
297  IN ULONG Inode,
298  IN PRFSD_INODE RfsdInode)
299 {
300 DbgBreak();
301 #if DISABLED
302  LONGLONG Offset = 0;
303  LARGE_INTEGER CurrentTime;
304  BOOLEAN bRet;
305 
306  KeQuerySystemTime(&CurrentTime);
307  RfsdInode->i_mtime = RfsdInode->i_atime =
308  (ULONG)(RfsdInodeTime(CurrentTime));
309 
310  RfsdPrint((DBG_INFO, "RfsdSaveInode: Saving Inode %xh: Mode=%xh Size=%xh\n",
311  Inode, RfsdInode->i_mode, RfsdInode->i_size));
312 
313  if (!RfsdGetInodeLba(Vcb, Inode, &Offset)) {
314  RfsdPrint((DBG_ERROR, "RfsdSaveInode: error get inode(%xh)'s addr.\n", Inode));
315  return FALSE;
316  }
317 
318  bRet = RfsdSaveBuffer(IrpContext, Vcb, Offset, sizeof(RFSD_INODE), RfsdInode);
319 
320  if (IsFlagOn(Vcb->Flags, VCB_FLOPPY_DISK)) {
321  RfsdStartFloppyFlushDpc(Vcb, NULL, NULL);
322  }
323 
324  return bRet;
325 #endif
326 }
327 
328 #endif // 0
329 
331 BOOLEAN
332 RfsdLoadBlock (
333  IN PRFSD_VCB Vcb,
334  IN ULONG dwBlk, // A disk block ptr (a disk block number)
335  IN OUT PVOID Buffer ) // A buffer, which must be allocated to contain at least Vcb->BlockSize
336 {
337  IO_STATUS_BLOCK IoStatus;
338  LONGLONG Offset;
339 
340  PAGED_CODE();
341 
342  Offset = (LONGLONG) dwBlk;
343  Offset = Offset * Vcb->BlockSize;
344 
345  if (!RfsdCopyRead(
346  Vcb->StreamObj,
347  (PLARGE_INTEGER)&Offset,
348  Vcb->BlockSize,
349  PIN_WAIT,
350  Buffer,
351  &IoStatus )) {
352  return FALSE;
353  }
354 
355  if (!NT_SUCCESS(IoStatus.Status)) {
356  return FALSE;
357  }
358 
359  return TRUE;
360 }
361 
362 #if 0
363 
364 BOOLEAN
365 RfsdSaveBlock ( IN PRFSD_IRP_CONTEXT IrpContext,
366  IN PRFSD_VCB Vcb,
367  IN ULONG dwBlk,
368  IN PVOID Buf )
369 {
370 DbgBreak();
371 #if DISABLED
372  LONGLONG Offset;
373  BOOLEAN bRet;
374 
375  Offset = (LONGLONG) dwBlk;
376  Offset = Offset * Vcb->BlockSize;
377 
378  bRet = RfsdSaveBuffer(IrpContext, Vcb, Offset, Vcb->BlockSize, Buf);
379 
380  if (IsFlagOn(Vcb->Flags, VCB_FLOPPY_DISK)) {
381  RfsdStartFloppyFlushDpc(Vcb, NULL, NULL);
382  }
383 
384  return bRet;
385 #endif
386 }
387 
388 BOOLEAN
389 RfsdSaveBuffer( IN PRFSD_IRP_CONTEXT IrpContext,
390  IN PRFSD_VCB Vcb,
391  IN LONGLONG Offset,
392  IN ULONG Size,
393  IN PVOID Buf )
394 {
395  PBCB Bcb;
396  PVOID Buffer;
397  BOOLEAN bRet;
398 
399  PAGED_CODE();
400 
401  if( !CcPinRead( Vcb->StreamObj,
402  (PLARGE_INTEGER) (&Offset),
403  Size,
404  PIN_WAIT,
405  &Bcb,
406  &Buffer )) {
407 
408  RfsdPrint((DBG_ERROR, "RfsdSaveBuffer: PinReading error ...\n"));
409  return FALSE;
410  }
411 
412  _SEH2_TRY {
413 
414  RtlCopyMemory(Buffer, Buf, Size);
415  CcSetDirtyPinnedData(Bcb, NULL );
416  RfsdRepinBcb(IrpContext, Bcb);
417 
418  SetFlag(Vcb->StreamObj->Flags, FO_FILE_MODIFIED);
419 
420  RfsdAddMcbEntry(Vcb, Offset, (LONGLONG)Size);
421 
422  bRet = TRUE;
423 
424  } _SEH2_FINALLY {
425 
426  if (AbnormalTermination()) {
427 
428  CcUnpinData(Bcb);
429  bRet = FALSE;
430  }
431  } _SEH2_END;
432 
433  CcUnpinData(Bcb);
434 
435  return bRet;
436 }
437 
438 NTSTATUS
439 RfsdGetBlock(
440  IN PRFSD_IRP_CONTEXT IrpContext,
441  IN PRFSD_VCB Vcb,
442  IN ULONG dwContent, // A ptr to a disk block (disk block number)
443  IN ULONG Index,
444  IN ULONG Layer,
445  IN BOOLEAN bAlloc,
446  OUT PULONG pBlock
447  )
448 {
449 DbgBreak();
450 #if DISABLED
451  NTSTATUS Status = STATUS_SUCCESS;
452  ULONG *pData = NULL;
453  ULONG i = 0, j = 0, temp = 1;
454  ULONG dwRet = 0;
455  ULONG dwBlk = 0;
456 
457  if (Layer == 0) {
458 
459  dwRet = dwContent;
460 
461  } else if (Layer <= 3) {
462 
463  /* allocate memory for pData to contain the block */
464  pData = (ULONG *) ExAllocatePoolWithTag(NonPagedPool, Vcb->BlockSize, RFSD_POOL_TAG);
465  if (!pData) {
466  RfsdPrint((DBG_ERROR, "RfsdGetBlock: no enough memory.\n"));
467  Status = STATUS_INSUFFICIENT_RESOURCES;
468  goto errorout;
469  }
470 
471  /* load the block dwContext into pData buffer */
472  if (!RfsdLoadBlock(Vcb, dwContent, pData)) {
473  ExFreePool(pData);
474  Status = STATUS_INSUFFICIENT_RESOURCES;
475  goto errorout;
476  }
477 
478  temp = 1 << ((BLOCK_BITS - 2) * (Layer - 1));
479 
480  i = Index / temp;
481  j = Index % temp;
482 
483  dwBlk = pData[i];
484 
485 #if DISABLED // WRITE MODE ONLY
486  if (dwBlk ==0 ) {
487 
488  if (bAlloc) {
489 
490  DbgBreak();
491 
492  /* we need allocate new block: dwBlk */
493 
494  Status = RfsdNewBlock(
495  IrpContext,
496  Vcb,
497  0,
498  dwContent,
499  &dwBlk
500  );
501 
502  if (!NT_SUCCESS(Status)) {
503  ExFreePool(pData);
504  goto errorout;
505  }
506 
507  /* we need save pData now */
508  pData[i] = dwBlk;
509 
510  /* save the block first, before next call */
511  if (!RfsdSaveBlock( IrpContext, Vcb,
512  dwContent, pData)) {
513 
514  /* error occurs when saving the block */
515  Status = STATUS_INSUFFICIENT_RESOURCES;
516 
517  /* we need free newly allocated block */
518  RfsdFreeBlock(IrpContext, Vcb, dwBlk);
519 
520  /* free the memory of pData */
521  ExFreePool(pData);
522 
523  goto errorout;
524  }
525 
526  } else {
527 
528  /* free the memory of pData */
529  ExFreePool(pData);
530 
531  goto errorout;
532  }
533  }
534 #endif
535 
536  /* free the memory of pData */
537  ExFreePool(pData);
538 
539  /* transfer to next recursion call */
540  Status = RfsdGetBlock(
541  IrpContext,
542  Vcb,
543  dwBlk,
544  j,
545  Layer - 1,
546  bAlloc,
547  &dwRet
548  );
549 
550  if (!NT_SUCCESS(Status)) {
551  dwRet = 0;
552  }
553  }
554 
555 errorout:
556 
557  *pBlock = dwRet;
558 
559  return Status;
560 #endif
561 }
562 
566 NTSTATUS
567 RfsdBlockMap(
568  IN PRFSD_IRP_CONTEXT IrpContext,
569  IN PRFSD_VCB Vcb,
570  IN ULONG InodeNo,
571  IN PRFSD_INODE Inode,
572  IN ULONG Index, // Ordinal index of this block in the BDL
573  IN BOOLEAN bAlloc, // FALSE
574  OUT PULONG pBlock // <
575  )
576 {
577  DbgBreak();
578 #if DISABLED
579  ULONG i;
580 
581  ULONG dwSizes[RFSD_BLOCK_TYPES];
582  NTSTATUS Status = STATUS_SUCCESS;;
583 
584  *pBlock = 0;
585 
586  for (i = 0; i < RFSD_BLOCK_TYPES; i++) {
587  dwSizes[i] = Vcb->dwData[i];
588  }
589 
590  for (i = 0; i < RFSD_BLOCK_TYPES; i++) {
591 
592  if (Index < dwSizes[i]) {
593 
594  ULONG dwRet = 0;
595  ULONG dwBlk = 0;
596 
597  // dwBlk will get the ptr to a block.
598  dwBlk = Inode->i_block[i==0 ? (Index):(i + RFSD_NDIR_BLOCKS - 1)];
599 
600 #if DISABLED // WRITE MODE ONLY
601  if (dwBlk == 0) {
602 
603  if (!bAlloc) {
604 
605  goto errorout;
606 
607  } else {
608 
609  DbgBreak();
610 
611  /* we need allocate new block: dwBlk */
612  Status = RfsdNewBlock(
613  IrpContext,
614  Vcb,
615  (InodeNo - 1) / BLOCKS_PER_GROUP,
616  0,
617  &dwBlk
618  );
619 
620  if (!NT_SUCCESS(Status)) {
621  goto errorout;
622  }
623 
624  /* save the it into inode*/
625  Inode->i_block[i==0 ? (Index):(i + RFSD_NDIR_BLOCKS - 1)] = dwBlk;
626 
627  /* save the inode */
628  if (!RfsdSaveInode( IrpContext,
629  Vcb,
630  InodeNo,
631  Inode)) {
632 
633  Status = STATUS_UNSUCCESSFUL;
634 
635  RfsdFreeBlock(IrpContext, Vcb, dwBlk);
636 
637  goto errorout;
638  }
639  }
640  }
641 #endif
642  Status = RfsdGetBlock(
643  IrpContext,
644  Vcb,
645  dwBlk,
646  Index,
647  i,
648  bAlloc,
649  &dwRet //<
650  );
651 
652  RfsdPrint((DBG_INFO, "RfsdBlockMap: i=%xh index=%xh dwBlk=%xh (%xh)\n",
653  i, Index, dwRet, dwBlk));
654 
655  if (NT_SUCCESS(Status)) {
656  *pBlock = dwRet;
657  }
658 
659  break;
660  }
661 
662  Index -= dwSizes[i];
663  }
664 
665 errorout:
666 
667  return Status;
668 #endif
669 }
670 
671 #endif // 0
672 
673 // NOTE: ReiserFS starts it byte offsets at 1, as opposed to 0 (which is used for the buffer -- and therefore, the BDL is also 0-based).
674 NTSTATUS
675 RfsdBuildBDL2(
676  IN PRFSD_VCB Vcb,
677  IN PRFSD_KEY_IN_MEMORY pKey,
678  IN PRFSD_INODE pInode,
679  OUT PULONG out_Count,
680  OUT PRFSD_BDL* out_ppBdl )
681 {
682  NTSTATUS Status = STATUS_SUCCESS;
683  BOOLEAN done = FALSE;
684 
685  RFSD_KEY_IN_MEMORY CurrentTargetKey = *pKey;
686  ULONGLONG CurrentOffset = 0;
687 
688  PRFSD_ITEM_HEAD pItemHeader = NULL; // The temporary storage for retrieving items from disk
689  PUCHAR pItemBuffer = NULL;
690  PUCHAR pBlockBuffer = NULL;
691 
692  ULONG idxCurrentBD = 0;
693  PRFSD_BDL pBdl = NULL; // The block descriptor list, which will be allocated, filled, and assigned to out_Bdl
694 
695  PAGED_CODE();
696 
697  // Allocate the BDL for the maximum number of block descriptors that will be needed (including the tail)
698  // FUTURE: sd_blocks DEFINITELY is not the number of blocks consumed by a file. (at least not the number of 4096-byte blocks)
699  // However, I'm unsure of how to calculate the number of blocks. Perhaps I should consider using a linked list instead?
700  KdPrint(("## Allocating %i BD's\n", pInode->i_size / Vcb->BlockSize + 3));
701  pBdl = ExAllocatePoolWithTag(NonPagedPool, sizeof(RFSD_BDL) * (SIZE_T) (pInode->i_size / Vcb->BlockSize + 3), RFSD_POOL_TAG);
702  if (!pBdl) { Status = STATUS_INSUFFICIENT_RESOURCES; goto errorout; }
703  //RtlZeroMemory(pBdl, sizeof(RFSD_BDL) * (pInode->sd_blocks + 1));
704  RtlZeroMemory(pBdl, sizeof(RFSD_BDL) * (SIZE_T) (pInode->i_size / Vcb->BlockSize + 3));
705 
706 
707  // Build descriptors for all of the indirect items associated with the file
708  while (!done)
709  {
710  // Search for an indirect item, corresponding to CurrentOffset...
711 
712  // Create the key to search for (note that the key always start with offset 1, even though it is for byte 0)
713  CurrentTargetKey.k_offset = CurrentOffset + 1;
714  CurrentTargetKey.k_type = RFSD_KEY_TYPE_v2_INDIRECT;
715 
716  // Perform the search
717  Status = RfsdLoadItem(
718  Vcb, &CurrentTargetKey,
719  &(pItemHeader), &(pItemBuffer), &(pBlockBuffer), NULL,
720  &CompareKeys
721  );
722 
723  // If there was no such indirect item...
724  if (Status == STATUS_NO_SUCH_MEMBER) { Status = STATUS_SUCCESS; break; }
725  if (!NT_SUCCESS(Status)) { goto errorout; }
726 
727  // Otherwise, create a block descriptor for each pointer in the indirect item
728  {
729  ULONG countBlockRefs = pItemHeader->ih_item_len / sizeof(ULONG);
730  ULONG idxBlockRef;
731 
732  for (idxBlockRef = 0; idxBlockRef < countBlockRefs; idxBlockRef++)
733  {
734  PULONG BlockRef = (PULONG) ((PUCHAR) pItemBuffer + sizeof(ULONG) * idxBlockRef);
735 
736  // Build a block descriptor for this block reference
737  pBdl[idxCurrentBD].Lba = (LONGLONG) *BlockRef * (LONGLONG) Vcb->BlockSize;
738  pBdl[idxCurrentBD].Length = Vcb->BlockSize;
739  pBdl[idxCurrentBD].Offset = CurrentOffset;
740 
741  // If this is the last reference in the indirect item, subtract the free space from the end
742  // TODO: this may not work, because the ih_free_space_reserved seems to be wrong / not there!
743  if (idxBlockRef == (countBlockRefs - 1))
744  pBdl[idxCurrentBD].Length -= pItemHeader->u.ih_free_space_reserved;
745 
746  // Advance to the next block reference
747  CurrentOffset += Vcb->BlockSize;
748  idxCurrentBD++;
749  }
750 
751  if (countBlockRefs <= 0) { done = TRUE; }
752  }
753 
754  if (pBlockBuffer) { ExFreePool(pBlockBuffer); pBlockBuffer = NULL; }
755  }
756 
757  // Cleanup the last remaining block buffer, from the indirect items
758  if (pBlockBuffer) { ExFreePool(pBlockBuffer); pBlockBuffer = NULL; }
759 
760  // Search for the tail of the file (its optional direct item), corresponding to CurrentOffset...
761  {
762  ULONG BlockNumber = 0;
763 
764  // Create the key to search for
765  CurrentTargetKey.k_offset = CurrentOffset + 1;
766  CurrentTargetKey.k_type = RFSD_KEY_TYPE_v2_DIRECT;
767 
768  // Perform the search
769  Status = RfsdLoadItem(
770  Vcb, &CurrentTargetKey,
771  &(pItemHeader), &(pItemBuffer), &(pBlockBuffer), &(BlockNumber),
772  &CompareKeys
773  );
774 
775  if (Status == STATUS_SUCCESS)
776  {
777  // If there was a tail, then build a block descriptor for it
778  pBdl[idxCurrentBD].Lba = (LONGLONG) BlockNumber * (LONGLONG) Vcb->BlockSize + pItemHeader->ih_item_location;
779  pBdl[idxCurrentBD].Length = pItemHeader->ih_item_len;
780  pBdl[idxCurrentBD].Offset = CurrentOffset;
781 
782  // Advance to the next block reference
783  CurrentOffset += pItemHeader->ih_item_len;
784  idxCurrentBD++;
785  }
786  else
787  {
788  if (Status == STATUS_NO_SUCH_MEMBER) { Status = STATUS_SUCCESS; goto errorout; } // If there wasn't a tail, it's fine
789  else { goto errorout; } // But if there was some other problem, let's report it.
790  }
791  }
792 
793  if (pBlockBuffer) { ExFreePool(pBlockBuffer); pBlockBuffer = NULL; }
794 
795  // Search for the second part of the tail of the file (its optional second direct item), corresponding to CurrentOffset...
796  {
797  ULONG BlockNumber = 0;
798 
799  // Create the key to search for
800  CurrentTargetKey.k_offset = CurrentOffset + 1;
801  CurrentTargetKey.k_type = RFSD_KEY_TYPE_v2_DIRECT;
802 
803  // Perform the search
804  Status = RfsdLoadItem(
805  Vcb, &CurrentTargetKey,
806  &(pItemHeader), &(pItemBuffer), &(pBlockBuffer), &(BlockNumber),
807  &CompareKeys
808  );
809 
810  if (Status == STATUS_SUCCESS)
811  {
812  // If there was a second part of the tail, then build a block descriptor for it
813  pBdl[idxCurrentBD].Lba = (LONGLONG) BlockNumber * (LONGLONG) Vcb->BlockSize + pItemHeader->ih_item_location;
814  pBdl[idxCurrentBD].Length = pItemHeader->ih_item_len;
815  pBdl[idxCurrentBD].Offset = CurrentOffset;
816 
817  idxCurrentBD++;
818  }
819  else
820  {
821  if (Status == STATUS_NO_SUCH_MEMBER) { Status = STATUS_SUCCESS; } // If there wasn't a second part of the tail, it's fine
822  else { goto errorout; } // But if there was some other problem, let's report it.
823  }
824  }
825 
826 errorout:
827  if (pBlockBuffer) { ExFreePool(pBlockBuffer); pBlockBuffer = NULL; }
828 
829  *out_ppBdl = pBdl;
830  *out_Count = idxCurrentBD;
831  return Status;
832 }
833 
834 #if 0
835 
836 NTSTATUS
837 RfsdNewBlock(
838  PRFSD_IRP_CONTEXT IrpContext,
839  PRFSD_VCB Vcb,
840  ULONG GroupHint,
841  ULONG BlockHint,
842  PULONG dwRet )
843 {
844 DbgBreak();
845 #if DISABLED
846  RTL_BITMAP BlockBitmap;
847  LARGE_INTEGER Offset;
848  ULONG Length;
849 
850  PBCB BitmapBcb;
851  PVOID BitmapCache;
852 
853  ULONG Group = 0, dwBlk, dwHint = 0;
854 
855  *dwRet = 0;
856  dwBlk = 0XFFFFFFFF;
857 
858  if (GroupHint > Vcb->NumOfGroups)
859  GroupHint = Vcb->NumOfGroups - 1;
860 
861  if (BlockHint != 0) {
862  GroupHint = (BlockHint - RFSD_FIRST_DATA_BLOCK) / BLOCKS_PER_GROUP;
863  dwHint = (BlockHint - RFSD_FIRST_DATA_BLOCK) % BLOCKS_PER_GROUP;
864  }
865 
866 ScanBitmap:
867 
868  // Perform Prefered Group
869  if (Vcb->GroupDesc[GroupHint].bg_free_blocks_count) {
870 
871  Offset.QuadPart = (LONGLONG) Vcb->BlockSize;
872  Offset.QuadPart = Offset.QuadPart *
873  Vcb->GroupDesc[GroupHint].bg_block_bitmap;
874 
875  if (GroupHint == Vcb->NumOfGroups - 1) {
876 
877  Length = TOTAL_BLOCKS % BLOCKS_PER_GROUP;
878 
879  /* s_blocks_count is integer multiple of s_blocks_per_group */
880  if (Length == 0) {
881  Length = BLOCKS_PER_GROUP;
882  }
883  } else {
884  Length = BLOCKS_PER_GROUP;
885  }
886 
887  if (!CcPinRead( Vcb->StreamObj,
888  &Offset,
889  Vcb->BlockSize,
890  PIN_WAIT,
891  &BitmapBcb,
892  &BitmapCache ) ) {
893 
894  RfsdPrint((DBG_ERROR, "RfsdNewBlock: PinReading error ...\n"));
895  return STATUS_INSUFFICIENT_RESOURCES;
896  }
897 
898  RtlInitializeBitMap( &BlockBitmap,
899  BitmapCache,
900  Length );
901 
902  Group = GroupHint;
903 
904  if (RtlCheckBit(&BlockBitmap, dwHint) == 0) {
905  dwBlk = dwHint;
906  } else {
907  dwBlk = RtlFindClearBits(&BlockBitmap, 1, dwHint);
908  }
909 
910  // We could not get new block in the prefered group.
911  if (dwBlk == 0xFFFFFFFF) {
912 
913  CcUnpinData(BitmapBcb);
914  BitmapBcb = NULL;
915  BitmapCache = NULL;
916 
917  RtlZeroMemory(&BlockBitmap, sizeof(RTL_BITMAP));
918  }
919  }
920 
921  if (dwBlk == 0xFFFFFFFF) {
922 
923  for(Group = 0; Group < Vcb->NumOfGroups; Group++)
924  if (Vcb->GroupDesc[Group].bg_free_blocks_count) {
925  if (Group == GroupHint)
926  continue;
927 
928  Offset.QuadPart = (LONGLONG) Vcb->BlockSize;
929  Offset.QuadPart = Offset.QuadPart * Vcb->GroupDesc[Group].bg_block_bitmap;
930 
931  if (Vcb->NumOfGroups == 1) {
932  Length = TOTAL_BLOCKS;
933  } else {
934  if (Group == Vcb->NumOfGroups - 1) {
935 
936  Length = TOTAL_BLOCKS % BLOCKS_PER_GROUP;
937 
938  /* s_blocks_count is integer multiple of s_blocks_per_group */
939  if (Length == 0) {
940  Length = BLOCKS_PER_GROUP;
941  }
942  } else {
943  Length = BLOCKS_PER_GROUP;
944  }
945  }
946 
947  if (!CcPinRead( Vcb->StreamObj,
948  &Offset,
949  Vcb->BlockSize,
950  PIN_WAIT,
951  &BitmapBcb,
952  &BitmapCache ) ) {
953  RfsdPrint((DBG_ERROR, "RfsdNewBlock: PinReading error ...\n"));
954  return STATUS_INSUFFICIENT_RESOURCES;
955  }
956 
957  RtlInitializeBitMap( &BlockBitmap,
958  BitmapCache,
959  Length );
960 
961  dwBlk = RtlFindClearBits(&BlockBitmap, 1, 0);
962 
963  if (dwBlk != 0xFFFFFFFF) {
964  break;
965 
966  } else {
967 
968  CcUnpinData(BitmapBcb);
969  BitmapBcb = NULL;
970  BitmapCache = NULL;
971 
972  RtlZeroMemory(&BlockBitmap, sizeof(RTL_BITMAP));
973  }
974  }
975  }
976 
977  if (dwBlk < Length) {
978 
979  RtlSetBits(&BlockBitmap, dwBlk, 1);
980 
981  CcSetDirtyPinnedData(BitmapBcb, NULL );
982 
983  RfsdRepinBcb(IrpContext, BitmapBcb);
984 
985  CcUnpinData(BitmapBcb);
986 
987  RfsdAddMcbEntry(Vcb, Offset.QuadPart, (LONGLONG)Vcb->BlockSize);
988 
989  *dwRet = dwBlk + RFSD_FIRST_DATA_BLOCK + Group * BLOCKS_PER_GROUP;
990 
991  //Updating Group Desc / Superblock
992  Vcb->GroupDesc[Group].bg_free_blocks_count--;
993  RfsdSaveGroup(IrpContext, Vcb, Group);
994 
995  Vcb->SuperBlock->s_free_blocks_count--;
996  RfsdSaveSuper(IrpContext, Vcb);
997 
998  {
999  ULONG i=0;
1000  for (i=0; i < Vcb->NumOfGroups; i++)
1001  {
1002  if ((Vcb->GroupDesc[i].bg_block_bitmap == *dwRet) ||
1003  (Vcb->GroupDesc[i].bg_inode_bitmap == *dwRet) ||
1004  (Vcb->GroupDesc[i].bg_inode_table == *dwRet) ) {
1005  DbgBreak();
1006  GroupHint = Group;
1007  goto ScanBitmap;
1008  }
1009  }
1010  }
1011 
1012  return STATUS_SUCCESS;
1013  }
1014 
1015  return STATUS_DISK_FULL;
1016 #endif
1017 }
1018 
1019 NTSTATUS
1020 RfsdFreeBlock(
1021  PRFSD_IRP_CONTEXT IrpContext,
1022  PRFSD_VCB Vcb,
1023  ULONG Block )
1024 {
1025 DbgBreak();
1026 #if DISABLED
1027 
1028  RTL_BITMAP BlockBitmap;
1029  LARGE_INTEGER Offset;
1030  ULONG Length;
1031 
1032  PBCB BitmapBcb;
1033  PVOID BitmapCache;
1034 
1035  ULONG Group, dwBlk;
1036  BOOLEAN bModified = FALSE;
1037 
1038  if ( Block < RFSD_FIRST_DATA_BLOCK ||
1039  (Block / BLOCKS_PER_GROUP) >= Vcb->NumOfGroups) {
1040 
1041  DbgBreak();
1042  return STATUS_INVALID_PARAMETER;
1043  }
1044 
1045  RfsdPrint((DBG_INFO, "RfsdFreeBlock: Block %xh to be freed.\n", Block));
1046 
1047  Group = (Block - RFSD_FIRST_DATA_BLOCK) / BLOCKS_PER_GROUP;
1048 
1049  dwBlk = (Block - RFSD_FIRST_DATA_BLOCK) % BLOCKS_PER_GROUP;
1050 
1051  {
1052  Offset.QuadPart = (LONGLONG) Vcb->BlockSize;
1053  Offset.QuadPart = Offset.QuadPart * Vcb->GroupDesc[Group].bg_block_bitmap;
1054 
1055  if (Group == Vcb->NumOfGroups - 1) {
1056 
1057  Length = TOTAL_BLOCKS % BLOCKS_PER_GROUP;
1058 
1059  /* s_blocks_count is integer multiple of s_blocks_per_group */
1060  if (Length == 0) {
1061  Length = BLOCKS_PER_GROUP;
1062  }
1063 
1064  } else {
1065  Length = BLOCKS_PER_GROUP;
1066  }
1067 
1068  if (!CcPinRead( Vcb->StreamObj,
1069  &Offset,
1070  Vcb->BlockSize,
1071  PIN_WAIT,
1072  &BitmapBcb,
1073  &BitmapCache ) ) {
1074 
1075  RfsdPrint((DBG_ERROR, "RfsdDeleteBlock: PinReading error ...\n"));
1076  return STATUS_INSUFFICIENT_RESOURCES;
1077  }
1078 
1079  RtlInitializeBitMap( &BlockBitmap,
1080  BitmapCache,
1081  Length );
1082 
1083  if (RtlCheckBit(&BlockBitmap, dwBlk) == 0) {
1084 
1085  } else {
1086  RtlClearBits(&BlockBitmap, dwBlk, 1);
1087  bModified = TRUE;
1088  }
1089 
1090  if (!bModified) {
1091 
1092  CcUnpinData(BitmapBcb);
1093  BitmapBcb = NULL;
1094  BitmapCache = NULL;
1095 
1096  RtlZeroMemory(&BlockBitmap, sizeof(RTL_BITMAP));
1097  }
1098  }
1099 
1100  if (bModified) {
1101 
1102  CcSetDirtyPinnedData(BitmapBcb, NULL );
1103 
1104  RfsdRepinBcb(IrpContext, BitmapBcb);
1105 
1106  CcUnpinData(BitmapBcb);
1107 
1108  RfsdAddMcbEntry(Vcb, Offset.QuadPart, (LONGLONG)Vcb->BlockSize);
1109 
1110  //Updating Group Desc / Superblock
1111  Vcb->GroupDesc[Group].bg_free_blocks_count++;
1112  RfsdSaveGroup(IrpContext, Vcb, Group);
1113 
1114  Vcb->SuperBlock->s_free_blocks_count++;
1115  RfsdSaveSuper(IrpContext, Vcb);
1116 
1117  return STATUS_SUCCESS;
1118  }
1119 
1120  return STATUS_UNSUCCESSFUL;
1121 #endif
1122 }
1123 
1124 NTSTATUS
1125 RfsdExpandBlock(
1126  PRFSD_IRP_CONTEXT IrpContext,
1127  PRFSD_VCB Vcb,
1128  PRFSD_FCB Fcb,
1129  ULONG dwContent,
1130  ULONG Index,
1131  ULONG layer,
1132  BOOLEAN bNew,
1133  ULONG *dwRet )
1134 {
1135 DbgBreak();
1136 #if DISABLED
1137 
1138  ULONG *pData = NULL;
1139  ULONG i = 0, j = 0, temp = 1;
1140  ULONG dwNewBlk = 0, dwBlk = 0;
1141  BOOLEAN bDirty = FALSE;
1142  NTSTATUS Status = STATUS_SUCCESS;
1143 
1144  PRFSD_INODE Inode = Fcb->Inode;
1145  PRFSD_SUPER_BLOCK RfsdSb = Vcb->SuperBlock;
1146 
1147  pData = (ULONG *) ExAllocatePoolWithTag(PagedPool, Vcb->BlockSize, RFSD_POOL_TAG);
1148 
1149  if (!pData) {
1150  return STATUS_INSUFFICIENT_RESOURCES;
1151  }
1152 
1153  RtlZeroMemory(pData, Vcb->BlockSize);
1154 
1155  if (bNew) {
1156 
1157  if (layer == 0) {
1158 
1159  if (IsDirectory(Fcb)) {
1160 
1161  PRFSD_DIR_ENTRY2 pEntry;
1162 
1163  pEntry = (PRFSD_DIR_ENTRY2) pData;
1164  pEntry->rec_len = (USHORT)(Vcb->BlockSize);
1165 
1166  if (!RfsdSaveBlock(IrpContext, Vcb, dwContent, (PVOID)pData)) {
1167 
1168  Status = STATUS_UNSUCCESSFUL;
1169  goto errorout;
1170  }
1171 
1172  } else {
1173 
1174  LARGE_INTEGER Offset;
1175 
1176  Offset.QuadPart = (LONGLONG) dwContent;
1177  Offset.QuadPart = Offset.QuadPart * Vcb->BlockSize;
1178 
1179  RfsdRemoveMcbEntry(Vcb, Offset.QuadPart, (LONGLONG)Vcb->BlockSize);
1180  }
1181  } else {
1182 
1183  if (!RfsdSaveBlock(IrpContext, Vcb, dwContent, (PVOID)pData)) {
1184 
1185  Status = STATUS_UNSUCCESSFUL;
1186  goto errorout;
1187  }
1188  }
1189  }
1190 
1191  if (layer == 0) {
1192 
1193  dwNewBlk = dwContent;
1194 
1195  } else if (layer <= 3) {
1196 
1197  if (!bNew) {
1198 
1199  if (!RfsdLoadBlock(Vcb, dwContent, (void *)pData)) {
1200 
1201  Status = STATUS_UNSUCCESSFUL;
1202  goto errorout;
1203  }
1204  }
1205 
1206  temp = 1 << ((BLOCK_BITS - 2) * (layer - 1));
1207 
1208  i = Index / temp;
1209  j = Index % temp;
1210 
1211  dwBlk = pData[i];
1212 
1213  if (dwBlk == 0) {
1214 
1215  Status = RfsdNewBlock(
1216  IrpContext,
1217  Vcb, 0,
1218  dwContent,
1219  &dwBlk);
1220 
1221  if (!NT_SUCCESS(Status)) {
1222 
1223  RfsdPrint((DBG_ERROR, "RfsdExpandBlock: get new block error.\n"));
1224  goto errorout;
1225  }
1226 
1227  Inode->i_blocks += (Vcb->BlockSize / SECTOR_SIZE);
1228 
1229  pData[i] = dwBlk;
1230  bDirty = TRUE;
1231  }
1232 
1233  Status = RfsdExpandBlock(
1234  IrpContext,
1235  Vcb, Fcb,
1236  dwBlk, j,
1237  layer - 1,
1238  bDirty,
1239  &dwNewBlk );
1240 
1241  if (!NT_SUCCESS(Status))
1242  {
1243  RfsdPrint((DBG_ERROR, "RfsdExpandBlockk: ... error recuise...\n"));
1244  goto errorout;
1245  }
1246 
1247  if (bDirty)
1248  {
1249  RfsdSaveBlock( IrpContext,
1250  Vcb, dwContent,
1251  (void *)pData );
1252  }
1253  }
1254 
1255 errorout:
1256 
1257  if (pData)
1258  ExFreePool(pData);
1259 
1260  if (NT_SUCCESS(Status) && dwRet)
1261  *dwRet = dwNewBlk;
1262 
1263  return Status;
1264 #endif
1265 }
1266 
1267 NTSTATUS
1268 RfsdExpandInode(
1269  IN PRFSD_IRP_CONTEXT IrpContext,
1270  IN PRFSD_VCB Vcb,
1271  IN PRFSD_FCB Fcb,
1272  OUT PULONG dwRet
1273  )
1274 {
1275 DbgBreak();
1276 #if DISABLED
1277 
1278  ULONG dwSizes[RFSD_BLOCK_TYPES];
1279  ULONG Index = 0;
1280  ULONG dwTotal = 0;
1281  ULONG dwBlk = 0, dwNewBlk = 0;
1282  ULONG i;
1283  NTSTATUS Status = STATUS_SUCCESS;
1284  BOOLEAN bNewBlock = FALSE;
1285 
1286  PRFSD_INODE Inode = Fcb->Inode;
1287 
1288  Index = (ULONG)(Fcb->Header.AllocationSize.QuadPart >> BLOCK_BITS);
1289 
1290  for (i = 0; i < RFSD_BLOCK_TYPES; i++) {
1291  dwSizes[i] = Vcb->dwData[i];
1292  dwTotal += dwSizes[i];
1293  }
1294 
1295  if (Index >= dwTotal) {
1296 
1297  RfsdPrint((DBG_ERROR, "RfsdExpandInode: beyond the maxinum size of an inode.\n"));
1298  return STATUS_UNSUCCESSFUL;
1299  }
1300 
1301  for (i = 0; i < RFSD_BLOCK_TYPES; i++) {
1302 
1303  if (Index < dwSizes[i]) {
1304 
1305  dwBlk = Inode->i_block[i==0 ? (Index):(i + RFSD_NDIR_BLOCKS - 1)];
1306 
1307  if (dwBlk == 0) {
1308 
1309  Status = RfsdNewBlock(
1310  IrpContext,
1311  Vcb,
1312  Fcb->BlkHint ? 0 : ((Fcb->RfsdMcb->Inode - 1) / INODES_PER_GROUP),
1313  Fcb->BlkHint,
1314  &dwBlk );
1315 
1316  if (!NT_SUCCESS(Status) ) {
1317  RfsdPrint((DBG_ERROR, "RfsdExpandInode: get new block error.\n"));
1318  break;
1319  }
1320 
1321  Inode->i_block[i==0 ? (Index):(i + RFSD_NDIR_BLOCKS - 1)] = dwBlk;
1322 
1323  Inode->i_blocks += (Vcb->BlockSize / SECTOR_SIZE);
1324 
1325  bNewBlock = TRUE;
1326  }
1327 
1328  Status = RfsdExpandBlock (
1329  IrpContext,
1330  Vcb, Fcb,
1331  dwBlk, Index,
1332  i, bNewBlock,
1333  &dwNewBlk );
1334 
1335  if (NT_SUCCESS(Status)) {
1336  Fcb->Header.AllocationSize.QuadPart += Vcb->BlockSize;
1337  }
1338 
1339  break;
1340  }
1341 
1342  Index -= dwSizes[i];
1343  }
1344 
1345  RfsdSaveInode(IrpContext, Vcb, Fcb->RfsdMcb->Inode, Inode);
1346 
1347  if (NT_SUCCESS(Status)) {
1348  if (dwNewBlk) {
1349  if (dwRet) {
1350  Fcb->BlkHint = dwNewBlk+1;
1351  *dwRet = dwNewBlk;
1352 
1353  RfsdPrint((DBG_INFO, "RfsdExpandInode: %S (%xh) i=%2.2xh Index=%8.8xh New Block=%8.8xh\n",
1354  Fcb->RfsdMcb->ShortName.Buffer, Fcb->RfsdMcb->Inode, i, Index, dwNewBlk));
1355  }
1356  } else {
1357  DbgBreak();
1358  Status = STATUS_UNSUCCESSFUL;
1359  }
1360  }
1361 
1362  return Status;
1363 #endif
1364 }
1365 
1366 NTSTATUS
1367 RfsdNewInode(
1368  PRFSD_IRP_CONTEXT IrpContext,
1369  PRFSD_VCB Vcb,
1370  ULONG GroupHint,
1371  ULONG Type,
1372  PULONG Inode )
1373 {
1374 DbgBreak();
1375 #if DISABLED
1376 
1377  RTL_BITMAP InodeBitmap;
1378  PVOID BitmapCache;
1379  PBCB BitmapBcb;
1380 
1381  ULONG Group, i, j;
1382  ULONG Average, Length;
1383  LARGE_INTEGER Offset;
1384 
1385  ULONG dwInode;
1386 
1387  *Inode = dwInode = 0XFFFFFFFF;
1388 
1389 repeat:
1390 
1391  Group = i = 0;
1392 
1393  if (Type == RFSD_FT_DIR) {
1394 
1395  Average = Vcb->SuperBlock->s_free_inodes_count / Vcb->NumOfGroups;
1396 
1397  for (j = 0; j < Vcb->NumOfGroups; j++) {
1398 
1399  i = (j + GroupHint) % (Vcb->NumOfGroups);
1400 
1401  if ((Vcb->GroupDesc[i].bg_used_dirs_count << 8) <
1402  Vcb->GroupDesc[i].bg_free_inodes_count ) {
1403  Group = i + 1;
1404  break;
1405  }
1406  }
1407 
1408  if (!Group) {
1409 
1410  for (j = 0; j < Vcb->NumOfGroups; j++) {
1411 
1412  if (Vcb->GroupDesc[j].bg_free_inodes_count >= Average) {
1413  if (!Group || (Vcb->GroupDesc[j].bg_free_blocks_count >
1414  Vcb->GroupDesc[Group].bg_free_blocks_count ))
1415  Group = j + 1;
1416  }
1417  }
1418  }
1419 
1420  } else {
1421 
1422  /*
1423  * Try to place the inode in its parent directory (GroupHint)
1424  */
1425 
1426  if (Vcb->GroupDesc[GroupHint].bg_free_inodes_count) {
1427 
1428  Group = GroupHint + 1;
1429 
1430  } else {
1431 
1432  i = GroupHint;
1433 
1434  /*
1435  * Use a quadratic hash to find a group with a
1436  * free inode
1437  */
1438 
1439  for (j = 1; j < Vcb->NumOfGroups; j <<= 1) {
1440 
1441  i += j;
1442  if (i > Vcb->NumOfGroups)
1443  i -= Vcb->NumOfGroups;
1444 
1445  if (Vcb->GroupDesc[i].bg_free_inodes_count) {
1446  Group = i + 1;
1447  break;
1448  }
1449  }
1450  }
1451 
1452  if (!Group) {
1453  /*
1454  * That failed: try linear search for a free inode
1455  */
1456  i = GroupHint + 1;
1457  for (j = 2; j < Vcb->NumOfGroups; j++) {
1458  if (++i >= Vcb->NumOfGroups) i = 0;
1459 
1460  if (Vcb->GroupDesc[i].bg_free_inodes_count) {
1461  Group = i + 1;
1462  break;
1463  }
1464  }
1465  }
1466  }
1467 
1468  // Could not find a proper group.
1469  if (!Group) {
1470 
1471  return STATUS_DISK_FULL;
1472 
1473  } else {
1474 
1475  Group--;
1476 
1477  Offset.QuadPart = (LONGLONG) Vcb->BlockSize;
1478  Offset.QuadPart = Offset.QuadPart * Vcb->GroupDesc[Group].bg_inode_bitmap;
1479 
1480  if (Vcb->NumOfGroups == 1) {
1481  Length = INODES_COUNT;
1482  } else {
1483  if (Group == Vcb->NumOfGroups - 1) {
1484  Length = INODES_COUNT % INODES_PER_GROUP;
1485  if (!Length) {
1486  /* INODES_COUNT is integer multiple of INODES_PER_GROUP */
1487  Length = INODES_PER_GROUP;
1488  }
1489  } else {
1490  Length = INODES_PER_GROUP;
1491  }
1492  }
1493 
1494  if (!CcPinRead( Vcb->StreamObj,
1495  &Offset,
1496  Vcb->BlockSize,
1497  PIN_WAIT,
1498  &BitmapBcb,
1499  &BitmapCache ) ) {
1500 
1501  RfsdPrint((DBG_ERROR, "RfsdNewInode: PinReading error ...\n"));
1502 
1503  return STATUS_UNSUCCESSFUL;
1504  }
1505 
1506  RtlInitializeBitMap( &InodeBitmap,
1507  BitmapCache,
1508  Length );
1509 
1510  dwInode = RtlFindClearBits(&InodeBitmap, 1, 0);
1511 
1512  if (dwInode == 0xFFFFFFFF) {
1513  CcUnpinData(BitmapBcb);
1514  BitmapBcb = NULL;
1515  BitmapCache = NULL;
1516 
1517  RtlZeroMemory(&InodeBitmap, sizeof(RTL_BITMAP));
1518  }
1519  }
1520 
1521  if (dwInode == 0xFFFFFFFF || dwInode >= Length) {
1522 
1523  if (Vcb->GroupDesc[Group].bg_free_inodes_count != 0) {
1524 
1525  Vcb->GroupDesc[Group].bg_free_inodes_count = 0;
1526 
1527  RfsdSaveGroup(IrpContext, Vcb, Group);
1528  }
1529 
1530  goto repeat;
1531 
1532  } else {
1533 
1534  RtlSetBits(&InodeBitmap, dwInode, 1);
1535 
1536  CcSetDirtyPinnedData(BitmapBcb, NULL );
1537 
1538  RfsdRepinBcb(IrpContext, BitmapBcb);
1539 
1540  CcUnpinData(BitmapBcb);
1541 
1542  RfsdAddMcbEntry(Vcb, Offset.QuadPart, (LONGLONG)Vcb->BlockSize);
1543 
1544  *Inode = dwInode + 1 + Group * INODES_PER_GROUP;
1545 
1546  //Updating Group Desc / Superblock
1547  Vcb->GroupDesc[Group].bg_free_inodes_count--;
1548  if (Type == RFSD_FT_DIR) {
1549  Vcb->GroupDesc[Group].bg_used_dirs_count++;
1550  }
1551 
1552  RfsdSaveGroup(IrpContext, Vcb, Group);
1553 
1554  Vcb->SuperBlock->s_free_inodes_count--;
1555  RfsdSaveSuper(IrpContext, Vcb);
1556 
1557  return STATUS_SUCCESS;
1558  }
1559 
1560  return STATUS_DISK_FULL;
1561 
1562 #endif
1563 }
1564 
1565 BOOLEAN
1566 RfsdFreeInode(
1567  PRFSD_IRP_CONTEXT IrpContext,
1568  PRFSD_VCB Vcb,
1569  ULONG Inode,
1570  ULONG Type )
1571 {
1572 DbgBreak();
1573 #if DISABLED
1574 
1575  RTL_BITMAP InodeBitmap;
1576  PVOID BitmapCache;
1577  PBCB BitmapBcb;
1578 
1579  ULONG Group;
1580  ULONG Length;
1581  LARGE_INTEGER Offset;
1582 
1583  ULONG dwIno;
1584  BOOLEAN bModified = FALSE;
1585 
1586 
1587  Group = (Inode - 1) / INODES_PER_GROUP;
1588  dwIno = (Inode - 1) % INODES_PER_GROUP;
1589 
1590  RfsdPrint((DBG_INFO, "RfsdFreeInode: Inode: %xh (Group/Off = %xh/%xh)\n",
1591  Inode, Group, dwIno));
1592 
1593  {
1594  Offset.QuadPart = (LONGLONG) Vcb->BlockSize;
1595  Offset.QuadPart = Offset.QuadPart * Vcb->GroupDesc[Group].bg_inode_bitmap;
1596  if (Group == Vcb->NumOfGroups - 1) {
1597 
1598  Length = INODES_COUNT % INODES_PER_GROUP;
1599  if (!Length) {
1600  /* s_inodes_count is integer multiple of s_inodes_per_group */
1601  Length = INODES_PER_GROUP;
1602  }
1603  } else {
1604  Length = INODES_PER_GROUP;
1605  }
1606 
1607  if (!CcPinRead( Vcb->StreamObj,
1608  &Offset,
1609  Vcb->BlockSize,
1610  PIN_WAIT,
1611  &BitmapBcb,
1612  &BitmapCache ) ) {
1613  RfsdPrint((DBG_ERROR, "RfsdFreeInode: PinReading error ...\n"));
1614  return FALSE;
1615  }
1616 
1617  RtlInitializeBitMap( &InodeBitmap,
1618  BitmapCache,
1619  Length );
1620 
1621  if (RtlCheckBit(&InodeBitmap, dwIno) == 0) {
1622  DbgBreak();
1623  } else {
1624  RtlClearBits(&InodeBitmap, dwIno, 1);
1625  bModified = TRUE;
1626  }
1627 
1628  if (!bModified) {
1629 
1630  CcUnpinData(BitmapBcb);
1631  BitmapBcb = NULL;
1632  BitmapCache = NULL;
1633 
1634  RtlZeroMemory(&InodeBitmap, sizeof(RTL_BITMAP));
1635  }
1636  }
1637 
1638  if (bModified) {
1639 
1640  CcSetDirtyPinnedData(BitmapBcb, NULL );
1641 
1642  RfsdRepinBcb(IrpContext, BitmapBcb);
1643 
1644  CcUnpinData(BitmapBcb);
1645 
1646  RfsdAddMcbEntry(Vcb, Offset.QuadPart, (LONGLONG)Vcb->BlockSize);
1647 
1648  //Updating Group Desc / Superblock
1649  if (Type == RFSD_FT_DIR) {
1650  Vcb->GroupDesc[Group].bg_used_dirs_count--;
1651  }
1652 
1653  Vcb->GroupDesc[Group].bg_free_inodes_count++;
1654  RfsdSaveGroup(IrpContext, Vcb, Group);
1655 
1656  Vcb->SuperBlock->s_free_inodes_count++;
1657  RfsdSaveSuper(IrpContext, Vcb);
1658 
1659  return TRUE;
1660  }
1661 
1662  return FALSE;
1663 
1664 #endif
1665 }
1666 
1667 NTSTATUS
1668 RfsdAddEntry (
1669  IN PRFSD_IRP_CONTEXT IrpContext,
1670  IN PRFSD_VCB Vcb,
1671  IN PRFSD_FCB Dcb,
1672  IN ULONG FileType,
1673  IN ULONG Inode,
1674  IN PUNICODE_STRING FileName )
1675 {
1676 DbgBreak();
1677 #if DISABLED
1678  NTSTATUS Status = STATUS_UNSUCCESSFUL;
1679 
1680  PRFSD_DIR_ENTRY2 pDir = NULL;
1681  PRFSD_DIR_ENTRY2 pNewDir = NULL;
1682  PRFSD_DIR_ENTRY2 pTarget = NULL;
1683 
1684  ULONG Length = 0;
1685  ULONG dwBytes = 0;
1686 
1687  BOOLEAN bFound = FALSE;
1688  BOOLEAN bAdding = FALSE;
1689 
1690  BOOLEAN MainResourceAcquired = FALSE;
1691 
1692  ULONG dwRet;
1693 
1694  if (!IsDirectory(Dcb)) {
1695  DbgBreak();
1696  return STATUS_NOT_A_DIRECTORY;
1697  }
1698 
1699  MainResourceAcquired = ExAcquireResourceExclusiveLite(&Dcb->MainResource, TRUE);
1700 
1701  _SEH2_TRY {
1702 
1703  Dcb->ReferenceCount++;
1704 
1705  pDir = (PRFSD_DIR_ENTRY2) ExAllocatePoolWithTag(PagedPool,
1706  RFSD_DIR_REC_LEN(RFSD_NAME_LEN), RFSD_POOL_TAG);
1707  if (!pDir) {
1708  Status = STATUS_INSUFFICIENT_RESOURCES;
1709  _SEH2_LEAVE;
1710  }
1711 
1712  pTarget = (PRFSD_DIR_ENTRY2) ExAllocatePoolWithTag(PagedPool,
1713  2 * RFSD_DIR_REC_LEN(RFSD_NAME_LEN), RFSD_POOL_TAG);
1714  if (!pTarget) {
1715 
1716  Status = STATUS_INSUFFICIENT_RESOURCES;
1717  _SEH2_LEAVE;
1718  }
1719 
1720 #if DISABLED // disabled in FFS too
1721  if (IsFlagOn( SUPER_BLOCK->s_feature_incompat,
1722  RFSD_FEATURE_INCOMPAT_FILETYPE)) {
1723  pDir->file_type = (UCHAR) FileType;
1724  } else
1725 #endif
1726  {
1727  pDir->file_type = 0;
1728  }
1729 
1730  {
1731  OEM_STRING OemName;
1732  OemName.Buffer = pDir->name;
1733  OemName.MaximumLength = RFSD_NAME_LEN;
1734  OemName.Length = 0;
1735 
1736  Status = RfsdUnicodeToOEM(&OemName, FileName);
1737 
1738  if (!NT_SUCCESS(Status)) {
1739  _SEH2_LEAVE;
1740  }
1741 
1742  pDir->name_len = (CCHAR) OemName.Length;
1743  }
1744 
1745  pDir->inode = Inode;
1746  pDir->rec_len = (USHORT) (RFSD_DIR_REC_LEN(pDir->name_len));
1747 
1748  dwBytes = 0;
1749 
1750 Repeat:
1751 
1752  while ((LONGLONG)dwBytes < Dcb->Header.AllocationSize.QuadPart) {
1753 
1754  RtlZeroMemory(pTarget, RFSD_DIR_REC_LEN(RFSD_NAME_LEN));
1755 
1756  // Reading the DCB contents
1757  Status = RfsdReadInode(
1758  NULL,
1759  Vcb,
1760  Dcb->RfsdMcb->Inode,
1761  Dcb->Inode,
1762  dwBytes,
1763  (PVOID)pTarget,
1764  RFSD_DIR_REC_LEN(RFSD_NAME_LEN),
1765  &dwRet);
1766 
1767  if (!NT_SUCCESS(Status)) {
1768  RfsdPrint((DBG_ERROR, "RfsdAddDirectory: Reading Directory Content error.\n"));
1769  _SEH2_LEAVE;
1770  }
1771 
1772  if (((pTarget->inode == 0) && pTarget->rec_len >= pDir->rec_len) ||
1773  (pTarget->rec_len >= RFSD_DIR_REC_LEN(pTarget->name_len) + pDir->rec_len)) {
1774 
1775  if (pTarget->inode) {
1776 
1777  RtlZeroMemory(pTarget, 2 * RFSD_DIR_REC_LEN(RFSD_NAME_LEN));
1778 
1779  // Reading the DCB contents
1780  Status = RfsdReadInode(
1781  NULL,
1782  Vcb,
1783  Dcb->RfsdMcb->Inode,
1784  Dcb->Inode,
1785  dwBytes,
1786  (PVOID)pTarget,
1787  2 * RFSD_DIR_REC_LEN(RFSD_NAME_LEN),
1788  &dwRet);
1789 
1790  if (!NT_SUCCESS(Status)) {
1791  RfsdPrint((DBG_ERROR, "RfsdAddDirectory: Reading Directory Content error.\n"));
1792  _SEH2_LEAVE;
1793  }
1794 
1795  Length = RFSD_DIR_REC_LEN(pTarget->name_len);
1796 
1797  pNewDir = (PRFSD_DIR_ENTRY2) ((PUCHAR)pTarget + RFSD_DIR_REC_LEN(pTarget->name_len));
1798 
1799  pNewDir->rec_len = pTarget->rec_len - RFSD_DIR_REC_LEN(pTarget->name_len);
1800 
1801  pTarget->rec_len = RFSD_DIR_REC_LEN(pTarget->name_len);
1802 
1803  } else {
1804 
1805  Length = 0;
1806  pNewDir = pTarget;
1807  }
1808 
1809  pNewDir->file_type = pDir->file_type;
1810  pNewDir->inode = pDir->inode;
1811  pNewDir->name_len = pDir->name_len;
1812  memcpy(pNewDir->name, pDir->name, pDir->name_len);
1813  Length += RFSD_DIR_REC_LEN(pDir->name_len);
1814 
1815  bFound = TRUE;
1816  break;
1817  }
1818 
1819  dwBytes += pTarget->rec_len;
1820  }
1821 
1822  if (bFound) {
1823 
1824  ULONG dwRet;
1825 
1826  if ( FileType==RFSD_FT_DIR ) {
1827 
1828  if(((pDir->name_len == 1) && (pDir->name[0] == '.')) ||
1829  ((pDir->name_len == 2) && (pDir->name[0] == '.') && (pDir->name[1] == '.')) ) {
1830  } else {
1831  Dcb->Inode->i_links_count++;
1832  }
1833  }
1834 
1835  Status = RfsdWriteInode(
1836  IrpContext,
1837  Vcb,
1838  Dcb->RfsdMcb->Inode,
1839  Dcb->Inode,
1840  (ULONGLONG)dwBytes,
1841  pTarget,
1842  Length,
1843  FALSE,
1844  &dwRet );
1845  } else {
1846 
1847  // We should expand the size of the dir inode
1848  if (!bAdding) {
1849 
1850  ULONG dwRet;
1851 
1852  Status = RfsdExpandInode(IrpContext, Vcb, Dcb, &dwRet);
1853 
1854  if (NT_SUCCESS(Status)) {
1855 
1856  Dcb->Inode->i_size = Dcb->Header.AllocationSize.LowPart;
1857 
1858  RfsdSaveInode(IrpContext, Vcb, Dcb->RfsdMcb->Inode, Dcb->Inode);
1859 
1860  Dcb->Header.FileSize = Dcb->Header.AllocationSize;
1861 
1862  bAdding = TRUE;
1863 
1864  goto Repeat;
1865  }
1866 
1867  _SEH2_LEAVE;
1868 
1869  } else { // Something must be error!
1870  _SEH2_LEAVE;
1871  }
1872  }
1873 
1874  } _SEH2_FINALLY {
1875 
1876  Dcb->ReferenceCount--;
1877 
1878  if(MainResourceAcquired) {
1879  ExReleaseResourceForThreadLite(
1880  &Dcb->MainResource,
1881  ExGetCurrentResourceThread());
1882  }
1883 
1884  if (pTarget != NULL) {
1885  ExFreePool(pTarget);
1886  }
1887 
1888  if (pDir) {
1889  ExFreePool(pDir);
1890  }
1891  } _SEH2_END;
1892 
1893  return Status;
1894 #endif
1895 }
1896 
1897 NTSTATUS
1898 RfsdRemoveEntry (
1899  IN PRFSD_IRP_CONTEXT IrpContext,
1900  IN PRFSD_VCB Vcb,
1901  IN PRFSD_FCB Dcb,
1902  IN ULONG FileType,
1903  IN ULONG Inode )
1904 {
1905 DbgBreak();
1906 #if DISABLED
1907  NTSTATUS Status = STATUS_UNSUCCESSFUL;
1908 
1909  PRFSD_DIR_ENTRY2 pTarget = NULL;
1910  PRFSD_DIR_ENTRY2 pPrevDir = NULL;
1911 
1912  USHORT PrevRecLen = 0;
1913 
1914  ULONG Length = 0;
1915  ULONG dwBytes = 0;
1916 
1917  BOOLEAN MainResourceAcquired = FALSE;
1918 
1919  ULONG dwRet;
1920 
1921  if (!IsDirectory(Dcb)) {
1922  return STATUS_NOT_A_DIRECTORY;
1923  }
1924 
1925  MainResourceAcquired =
1926  ExAcquireResourceExclusiveLite(&Dcb->MainResource, TRUE);
1927 
1928  _SEH2_TRY {
1929 
1930  Dcb->ReferenceCount++;
1931 
1932  pTarget = (PRFSD_DIR_ENTRY2) ExAllocatePoolWithTag(PagedPool,
1933  RFSD_DIR_REC_LEN(RFSD_NAME_LEN), RFSD_POOL_TAG);
1934  if (!pTarget) {
1935 
1936  Status = STATUS_INSUFFICIENT_RESOURCES;
1937  _SEH2_LEAVE;
1938  }
1939 
1940  pPrevDir = (PRFSD_DIR_ENTRY2) ExAllocatePoolWithTag(PagedPool,
1941  RFSD_DIR_REC_LEN(RFSD_NAME_LEN), RFSD_POOL_TAG);
1942  if (!pPrevDir) {
1943  Status = STATUS_INSUFFICIENT_RESOURCES;
1944  _SEH2_LEAVE;
1945  }
1946 
1947  dwBytes = 0;
1948 
1949  while ((LONGLONG)dwBytes < Dcb->Header.AllocationSize.QuadPart) {
1950 
1951  RtlZeroMemory(pTarget, RFSD_DIR_REC_LEN(RFSD_NAME_LEN));
1952 
1953  Status = RfsdReadInode(
1954  NULL,
1955  Vcb,
1956  Dcb->RfsdMcb->Inode,
1957  Dcb->Inode,
1958  dwBytes,
1959  (PVOID)pTarget,
1960  RFSD_DIR_REC_LEN(RFSD_NAME_LEN),
1961  &dwRet);
1962 
1963  if (!NT_SUCCESS(Status)) {
1964 
1965  RfsdPrint((DBG_ERROR, "RfsdRemoveEntry: Reading Directory Content error.\n"));
1966  _SEH2_LEAVE;
1967  }
1968 
1969  //
1970  // Find it ! Then remove the entry from Dcb ...
1971  //
1972 
1973  if (pTarget->inode == Inode) {
1974 
1975  ULONG RecLen;
1976 
1977  BOOLEAN bAcross = FALSE;
1978 
1979  if (((ULONG)PrevRecLen + pTarget->rec_len) > BLOCK_SIZE) {
1980  bAcross = TRUE;
1981  } else {
1982 
1983  dwRet = (dwBytes - PrevRecLen) & (~(BLOCK_SIZE - 1));
1984  if (dwRet != (dwBytes & (~(BLOCK_SIZE - 1))))
1985  {
1986  bAcross = TRUE;
1987  }
1988  }
1989 
1990  if (!bAcross) {
1991 
1992  pPrevDir->rec_len += pTarget->rec_len;
1993 
1994  RecLen = RFSD_DIR_REC_LEN(pTarget->name_len);
1995 
1996  RtlZeroMemory(pTarget, RecLen);
1997 
1998  Status = RfsdWriteInode(
1999  IrpContext,
2000  Vcb,
2001  Dcb->RfsdMcb->Inode,
2002  Dcb->Inode,
2003  dwBytes - PrevRecLen,
2004  pPrevDir,
2005  8,
2006  FALSE,
2007  &dwRet
2008  );
2009 
2010  ASSERT(NT_SUCCESS(Status));
2011 
2012  Status = RfsdWriteInode(
2013  IrpContext,
2014  Vcb,
2015  Dcb->RfsdMcb->Inode,
2016  Dcb->Inode,
2017  dwBytes,
2018  pTarget,
2019  RecLen,
2020  FALSE,
2021  &dwRet
2022  );
2023 
2024  ASSERT(NT_SUCCESS(Status));
2025 
2026  } else {
2027 
2028  RecLen = (ULONG)pTarget->rec_len;
2029  if (RecLen > RFSD_DIR_REC_LEN(RFSD_NAME_LEN)) {
2030 
2031  RtlZeroMemory(pTarget, RFSD_DIR_REC_LEN(RFSD_NAME_LEN));
2032 
2033  pTarget->rec_len = (USHORT)RecLen;
2034 
2035  Status = RfsdWriteInode(
2036  IrpContext,
2037  Vcb,
2038  Dcb->RfsdMcb->Inode,
2039  Dcb->Inode,
2040  dwBytes,
2041  pTarget,
2042  RFSD_DIR_REC_LEN(RFSD_NAME_LEN),
2043  FALSE,
2044  &dwRet
2045  );
2046 
2047  ASSERT(NT_SUCCESS(Status));
2048 
2049  } else {
2050 
2051  RtlZeroMemory(pTarget, RecLen);
2052  pTarget->rec_len = (USHORT)RecLen;
2053 
2054  Status = RfsdWriteInode(
2055  IrpContext,
2056  Vcb,
2057  Dcb->RfsdMcb->Inode,
2058  Dcb->Inode,
2059  dwBytes,
2060  pTarget,
2061  RecLen,
2062  FALSE,
2063  &dwRet
2064  );
2065 
2066  ASSERT(NT_SUCCESS(Status));
2067  }
2068  }
2069 
2070  //
2071  // Error if it's the entry of dot or dot-dot or drop the parent's refer link
2072  //
2073 
2074  if (FileType == RFSD_FT_DIR) {
2075 
2076  if(((pTarget->name_len == 1) && (pTarget->name[0] == '.')) ||
2077  ((pTarget->name_len == 2) && (pTarget->name[0] == '.') && (pTarget->name[1] == '.')) ) {
2078 
2079  DbgBreak();
2080  } else {
2081  Dcb->Inode->i_links_count--;
2082  }
2083  }
2084 
2085  //
2086  // Update at least mtime/atime if !RFSD_FT_DIR.
2087  //
2088 
2089  if ( !RfsdSaveInode(
2090  IrpContext,
2091  Vcb,
2092  Dcb->RfsdMcb->Inode,
2093  Dcb->Inode
2094  ) ) {
2095  Status = STATUS_UNSUCCESSFUL;
2096  }
2097 
2098  break;
2099 
2100  } else {
2101 
2102  RtlCopyMemory(pPrevDir, pTarget, RFSD_DIR_REC_LEN(RFSD_NAME_LEN));
2103  PrevRecLen = pTarget->rec_len;
2104  }
2105 
2106  dwBytes += pTarget->rec_len;
2107  }
2108 
2109  } _SEH2_FINALLY {
2110 
2111  Dcb->ReferenceCount--;
2112 
2113  if(MainResourceAcquired)
2114  ExReleaseResourceForThreadLite(
2115  &Dcb->MainResource,
2116  ExGetCurrentResourceThread());
2117 
2118  if (pTarget != NULL) {
2119  ExFreePool(pTarget);
2120  }
2121 
2122  if (pPrevDir != NULL) {
2123  ExFreePool(pPrevDir);
2124  }
2125  } _SEH2_END;
2126 
2127  return Status;
2128 #endif
2129 }
2130 
2131 NTSTATUS
2132 RfsdSetParentEntry (
2133  IN PRFSD_IRP_CONTEXT IrpContext,
2134  IN PRFSD_VCB Vcb,
2135  IN PRFSD_FCB Dcb,
2136  IN ULONG OldParent,
2137  IN ULONG NewParent )
2138 {
2139 DbgBreak();
2140 #if DISABLED
2141  NTSTATUS Status = STATUS_UNSUCCESSFUL;
2142 
2143  PRFSD_DIR_ENTRY2 pSelf = NULL;
2144  PRFSD_DIR_ENTRY2 pParent = NULL;
2145 
2146  ULONG dwBytes = 0;
2147 
2148  BOOLEAN MainResourceAcquired = FALSE;
2149 
2150  ULONG Offset = 0;
2151 
2152  if (!IsDirectory(Dcb)) {
2153  return STATUS_NOT_A_DIRECTORY;
2154  }
2155 
2156  MainResourceAcquired =
2157  ExAcquireResourceExclusiveLite(&Dcb->MainResource, TRUE);
2158 
2159  _SEH2_TRY {
2160 
2161  Dcb->ReferenceCount++;
2162 
2163  pSelf = (PRFSD_DIR_ENTRY2) ExAllocatePoolWithTag(PagedPool,
2164  RFSD_DIR_REC_LEN(1) + RFSD_DIR_REC_LEN(2), RFSD_POOL_TAG);
2165  if (!pSelf) {
2166  Status = STATUS_INSUFFICIENT_RESOURCES;
2167  _SEH2_LEAVE;
2168  }
2169 
2170  dwBytes = 0;
2171 
2172  //
2173  // Reading the DCB contents
2174  //
2175 
2176  Status = RfsdReadInode(
2177  NULL,
2178  Vcb,
2179  Dcb->RfsdMcb->Inode,
2180  Dcb->Inode,
2181  Offset,
2182  (PVOID)pSelf,
2183  RFSD_DIR_REC_LEN(1) + RFSD_DIR_REC_LEN(2),
2184  &dwBytes );
2185 
2186  if (!NT_SUCCESS(Status)) {
2187  RfsdPrint((DBG_ERROR, "RfsdSetParentEntry: Reading Directory Content error.\n"));
2188  _SEH2_LEAVE;
2189  }
2190 
2191  ASSERT(dwBytes == RFSD_DIR_REC_LEN(1) + RFSD_DIR_REC_LEN(2));
2192 
2193  pParent = (PRFSD_DIR_ENTRY2)((PUCHAR)pSelf + pSelf->rec_len);
2194 
2195  if (pParent->inode != OldParent) {
2196  DbgBreak();
2197  }
2198 
2199  pParent->inode = NewParent;
2200 
2201  Status = RfsdWriteInode(
2202  IrpContext,
2203  Vcb,
2204  Dcb->RfsdMcb->Inode,
2205  Dcb->Inode,
2206  Offset,
2207  pSelf,
2208  dwBytes,
2209  FALSE,
2210  &dwBytes );
2211 
2212  } _SEH2_FINALLY {
2213 
2214  Dcb->ReferenceCount--;
2215 
2216  if(MainResourceAcquired) {
2217  ExReleaseResourceForThreadLite(
2218  &Dcb->MainResource,
2219  ExGetCurrentResourceThread());
2220  }
2221 
2222  if (pSelf) {
2223  ExFreePool(pSelf);
2224  }
2225  } _SEH2_END;
2226 
2227  return Status;
2228 #endif
2229  { return 1; }
2230 }
2231 
2232 NTSTATUS
2233 RfsdTruncateBlock(
2234  IN PRFSD_IRP_CONTEXT IrpContext,
2235  IN PRFSD_VCB Vcb,
2236  IN PRFSD_FCB Fcb,
2237  IN ULONG dwContent,
2238  IN ULONG Index,
2239  IN ULONG layer,
2240  OUT BOOLEAN *bFreed )
2241 {
2242 DbgBreak();
2243 #if DISABLED
2244 
2245  ULONG *pData = NULL;
2246  ULONG i = 0, j = 0, temp = 1;
2247  BOOLEAN bDirty = FALSE;
2248  ULONG dwBlk;
2249 
2250  LONGLONG Offset;
2251 
2252  PBCB Bcb;
2253 
2254  NTSTATUS Status = STATUS_SUCCESS;
2255 
2256  PRFSD_INODE Inode = Fcb->Inode;
2257 
2258  *bFreed = FALSE;
2259 
2260  if (layer == 0) {
2261 
2262  if ( dwContent > 0 && (dwContent / BLOCKS_PER_GROUP) < Vcb->NumOfGroups) {
2263 
2264  Status = RfsdFreeBlock(IrpContext, Vcb, dwContent);
2265 
2266  if (NT_SUCCESS(Status)) {
2267 
2268  ASSERT(Inode->i_blocks >= (Vcb->BlockSize / SECTOR_SIZE));
2269  Inode->i_blocks -= (Vcb->BlockSize / SECTOR_SIZE);
2270  *bFreed = TRUE;
2271  }
2272 
2273  } else if (dwContent == 0) {
2274  Status = STATUS_SUCCESS;
2275  } else {
2276  DbgBreak();
2277  Status = STATUS_INVALID_PARAMETER;
2278  }
2279 
2280  } else if (layer <= 3) {
2281 
2282  Offset = (LONGLONG) dwContent;
2283  Offset = Offset * Vcb->BlockSize;
2284 
2285  if (!CcPinRead( Vcb->StreamObj,
2286  (PLARGE_INTEGER) (&Offset),
2287  Vcb->BlockSize,
2288  PIN_WAIT,
2289  &Bcb,
2290  &pData )) {
2291 
2292  RfsdPrint((DBG_ERROR, "RfsdSaveBuffer: PinReading error ...\n"));
2293  Status = STATUS_INSUFFICIENT_RESOURCES;
2294  goto errorout;
2295  }
2296 
2297  temp = 1 << ((BLOCK_BITS - 2) * (layer - 1));
2298 
2299  i = Index / temp;
2300  j = Index % temp;
2301 
2302  dwBlk = pData[i];
2303 
2304  if (dwBlk) {
2305 
2306  Status = RfsdTruncateBlock(
2307  IrpContext,
2308  Vcb,
2309  Fcb,
2310  dwBlk,
2311  j,
2312  layer - 1,
2313  &bDirty
2314  );
2315 
2316  if(!NT_SUCCESS(Status)) {
2317  goto errorout;
2318  }
2319 
2320  if (bDirty) {
2321  pData[i] = 0;
2322  }
2323  }
2324 
2325  if (i == 0 && j == 0) {
2326 
2327  CcUnpinData(Bcb);
2328  pData = NULL;
2329 
2330  Status = RfsdFreeBlock(IrpContext, Vcb, dwContent);
2331 
2332  if (NT_SUCCESS(Status)) {
2333  ASSERT(Inode->i_blocks >= (Vcb->BlockSize / SECTOR_SIZE));
2334  Inode->i_blocks -= (Vcb->BlockSize / SECTOR_SIZE);
2335 
2336  *bFreed = TRUE;
2337  }
2338 
2339  } else {
2340 
2341  if (bDirty) {
2342  CcSetDirtyPinnedData(Bcb, NULL );
2343  RfsdRepinBcb(IrpContext, Bcb);
2344 
2345  RfsdAddMcbEntry(Vcb, Offset, (LONGLONG)Vcb->BlockSize);
2346  }
2347  }
2348  }
2349 
2350 errorout:
2351 
2352  if (pData) {
2353  CcUnpinData(Bcb);
2354  }
2355 
2356  return Status;
2357 
2358 #endif
2359 }
2360 
2361 NTSTATUS
2362 RfsdTruncateInode(
2363  IN PRFSD_IRP_CONTEXT IrpContext,
2364  IN PRFSD_VCB Vcb,
2365  IN PRFSD_FCB Fcb )
2366 {
2367 DbgBreak();
2368 #if DISABLED
2369 
2370  ULONG dwSizes[RFSD_BLOCK_TYPES];
2371  ULONG Index = 0;
2372  ULONG dwTotal = 0;
2373  ULONG dwBlk = 0;
2374 
2375  ULONG i;
2376  NTSTATUS Status = STATUS_SUCCESS;
2377  BOOLEAN bFreed = FALSE;
2378 
2379  PRFSD_INODE Inode = Fcb->Inode;
2380 
2381  Index = (ULONG)(Fcb->Header.AllocationSize.QuadPart >> BLOCK_BITS);
2382 
2383  if (Index > 0) {
2384  Index--;
2385  } else {
2386  return Status;
2387  }
2388 
2389  for (i = 0; i < RFSD_BLOCK_TYPES; i++) {
2390  dwSizes[i] = Vcb->dwData[i];
2391  dwTotal += dwSizes[i];
2392  }
2393 
2394  if (Index >= dwTotal) {
2395  RfsdPrint((DBG_ERROR, "RfsdTruncateInode: beyond the maxinum size of an inode.\n"));
2396  return Status;
2397  }
2398 
2399  for (i = 0; i < RFSD_BLOCK_TYPES; i++) {
2400 
2401  if (Index < dwSizes[i]) {
2402 
2403  dwBlk = Inode->i_block[i==0 ? (Index):(i + RFSD_NDIR_BLOCKS - 1)];
2404 
2405  if (dwBlk) {
2406 
2407  Status = RfsdTruncateBlock(IrpContext, Vcb, Fcb, dwBlk, Index , i, &bFreed);
2408  }
2409 
2410  if (NT_SUCCESS(Status)) {
2411 
2412  Fcb->Header.AllocationSize.QuadPart -= Vcb->BlockSize;
2413 
2414  if (bFreed) {
2415  Inode->i_block[i==0 ? (Index):(i + RFSD_NDIR_BLOCKS - 1)] = 0;
2416  }
2417  }
2418 
2419  break;
2420  }
2421 
2422  Index -= dwSizes[i];
2423  }
2424 
2425  //
2426  // Inode struct saving is done externally.
2427  //
2428 
2429  RfsdSaveInode(IrpContext, Vcb, Fcb->RfsdMcb->Inode, Inode);
2430 
2431 
2432  return Status;
2433 #endif
2434 }
2435 
2436 BOOLEAN
2437 RfsdAddMcbEntry ( // Mcb = map control block (maps file-relative block offsets to disk-relative block offsets)
2438  IN PRFSD_VCB Vcb,
2439  IN LONGLONG Lba,
2440  IN LONGLONG Length)
2441 {
2442 DbgBreak();
2443 #if DISABLED
2444 
2445  BOOLEAN bRet = FALSE;
2446 
2447  LONGLONG Offset;
2448 
2449 #if DBG
2450  LONGLONG DirtyLba;
2451  LONGLONG DirtyLen;
2452 #endif
2453 
2454 
2455  Offset = Lba & (~((LONGLONG)BLOCK_SIZE - 1));
2456 
2457  Length = (Length + Lba - Offset + BLOCK_SIZE - 1) &
2458  (~((LONGLONG)BLOCK_SIZE - 1));
2459 
2460  ASSERT ((Offset & (BLOCK_SIZE - 1)) == 0);
2461  ASSERT ((Length & (BLOCK_SIZE - 1)) == 0);
2462 
2463  Offset = (Offset >> BLOCK_BITS) + 1;
2464  Length = (Length >> BLOCK_BITS);
2465 
2466  ExAcquireResourceExclusiveLite(
2467  &(Vcb->McbResource),
2468  TRUE );
2469 
2470  RfsdPrint((DBG_INFO, "RfsdAddMcbEntry: Lba=%I64xh Length=%I64xh\n",
2471  Offset, Length ));
2472 
2473 #if DBG
2474  bRet = FsRtlLookupLargeMcbEntry(
2475  &(Vcb->DirtyMcbs),
2476  Offset,
2477  &DirtyLba,
2478  &DirtyLen,
2479  NULL,
2480  NULL,
2481  NULL );
2482 
2483  if (bRet && DirtyLba == Offset && DirtyLen >= Length) {
2484 
2485  RfsdPrint((DBG_INFO, "RfsdAddMcbEntry: this run already exists.\n"));
2486  }
2487 #endif
2488 
2489  _SEH2_TRY {
2490 
2491  bRet = FsRtlAddLargeMcbEntry(
2492  &(Vcb->DirtyMcbs),
2493  Offset, Offset,
2494  Length );
2495 
2496  } _SEH2_EXCEPT (EXCEPTION_EXECUTE_HANDLER) {
2497 
2498  DbgBreak();
2499  bRet = FALSE;
2500  } _SEH2_END;
2501 
2502 #if DBG
2503  if (bRet) {
2504 
2505  BOOLEAN bFound = FALSE;
2506  LONGLONG RunStart;
2507  LONGLONG RunLength;
2508  ULONG Index;
2509 
2510  bFound = FsRtlLookupLargeMcbEntry(
2511  &(Vcb->DirtyMcbs),
2512  Offset,
2513  &DirtyLba,
2514  &DirtyLen,
2515  &RunStart,
2516  &RunLength,
2517  &Index );
2518 
2519  if ((!bFound) || (DirtyLba == -1) ||
2520  (DirtyLba != Offset) || (DirtyLen < Length)) {
2521  LONGLONG DirtyVba;
2522  LONGLONG DirtyLba;
2523  LONGLONG DirtyLength;
2524 
2525  DbgBreak();
2526 
2527  for ( Index = 0;
2528  FsRtlGetNextLargeMcbEntry( &(Vcb->DirtyMcbs),
2529  Index,
2530  &DirtyVba,
2531  &DirtyLba,
2532  &DirtyLength);
2533  Index++ ) {
2534 
2535  RfsdPrint((DBG_INFO, "Index = %xh\n", Index));
2536  RfsdPrint((DBG_INFO, "DirtyVba = %I64xh\n", DirtyVba));
2537  RfsdPrint((DBG_INFO, "DirtyLba = %I64xh\n", DirtyLba));
2538  RfsdPrint((DBG_INFO, "DirtyLen = %I64xh\n\n", DirtyLength));
2539  }
2540  }
2541  }
2542 #endif
2543 
2544  ExReleaseResourceForThreadLite(
2545  &(Vcb->McbResource),
2546  ExGetCurrentResourceThread() );
2547 
2548  return bRet;
2549 #endif
2550 
2551 }
2552 
2553 VOID
2554 RfsdRemoveMcbEntry (
2555  IN PRFSD_VCB Vcb,
2556  IN LONGLONG Lba,
2557  IN LONGLONG Length)
2558 {
2559  DbgBreak();
2560 #if DISABLED
2561 
2562  LONGLONG Offset;
2563 
2564  Offset = Lba & (~((LONGLONG)BLOCK_SIZE - 1));
2565 
2566  Length = (Length + Lba - Offset + BLOCK_SIZE - 1) &
2567  (~((LONGLONG)BLOCK_SIZE - 1));
2568 
2569  ASSERT(Offset == Lba);
2570 
2571  ASSERT ((Offset & (BLOCK_SIZE - 1)) == 0);
2572  ASSERT ((Length & (BLOCK_SIZE - 1)) == 0);
2573 
2574  Offset = (Offset >> BLOCK_BITS) + 1;
2575  Length = (Length >> BLOCK_BITS);
2576 
2577  RfsdPrint((DBG_INFO, "RfsdRemoveMcbEntry: Lba=%I64xh Length=%I64xh\n",
2578  Offset, Length ));
2579 
2580  ExAcquireResourceExclusiveLite(
2581  &(Vcb->McbResource),
2582  TRUE );
2583 
2584  _SEH2_TRY {
2585  FsRtlRemoveLargeMcbEntry(
2586  &(Vcb->DirtyMcbs),
2587  Offset, Length );
2588 
2589  } _SEH2_EXCEPT (EXCEPTION_EXECUTE_HANDLER) {
2590  DbgBreak();
2591  } _SEH2_END;
2592 
2593 #if DBG
2594  {
2595  BOOLEAN bFound = FALSE;
2596  LONGLONG DirtyLba, DirtyLen;
2597 
2598  bFound = FsRtlLookupLargeMcbEntry(
2599  &(Vcb->DirtyMcbs),
2600  Offset,
2601  &DirtyLba,
2602  &DirtyLen,
2603  NULL,
2604  NULL,
2605  NULL );
2606 
2607  if (bFound &&( DirtyLba != -1)) {
2608  DbgBreak();
2609  }
2610  }
2611 #endif
2612 
2613  ExReleaseResourceForThreadLite(
2614  &(Vcb->McbResource),
2615  ExGetCurrentResourceThread() );
2616 #endif
2617 }
2618 
2619 BOOLEAN
2620 RfsdLookupMcbEntry (
2621  IN PRFSD_VCB Vcb,
2622  IN LONGLONG Lba,
2623  OUT PLONGLONG pLba,
2624  OUT PLONGLONG pLength,
2625  OUT PLONGLONG RunStart,
2626  OUT PLONGLONG RunLength,
2627  OUT PULONG Index)
2628 {
2629 DbgBreak();
2630 #if DISABLED
2631 
2632  BOOLEAN bRet;
2633  LONGLONG Offset;
2634 
2635 
2636  Offset = Lba & (~((LONGLONG)BLOCK_SIZE - 1));
2637  ASSERT ((Offset & (BLOCK_SIZE - 1)) == 0);
2638 
2639  ASSERT(Lba == Offset);
2640 
2641  Offset = (Offset >> BLOCK_BITS) + 1;
2642 
2643  ExAcquireResourceExclusiveLite(
2644  &(Vcb->McbResource),
2645  TRUE );
2646 
2647  bRet = FsRtlLookupLargeMcbEntry(
2648  &(Vcb->DirtyMcbs),
2649  Offset,
2650  pLba,
2651  pLength,
2652  RunStart,
2653  RunLength,
2654  Index );
2655 
2656  ExReleaseResourceForThreadLite(
2657  &(Vcb->McbResource),
2658  ExGetCurrentResourceThread() );
2659 
2660  if (bRet) {
2661 
2662  if (pLba && ((*pLba) != -1)) {
2663 
2664  ASSERT((*pLba) > 0);
2665 
2666  (*pLba) = (((*pLba) - 1) << BLOCK_BITS);
2667  (*pLba) += ((Lba) & ((LONGLONG)BLOCK_SIZE - 1));
2668  }
2669 
2670  if (pLength) {
2671 
2672  (*pLength) <<= BLOCK_BITS;
2673  (*pLength) -= ((Lba) & ((LONGLONG)BLOCK_SIZE - 1));
2674  }
2675 
2676  if (RunStart && (*RunStart != -1)) {
2677  (*RunStart) = (((*RunStart) - 1) << BLOCK_BITS);
2678  }
2679 
2680  if (RunLength) {
2681  (*RunLength) <<= BLOCK_BITS;
2682  }
2683  }
2684 
2685  return bRet;
2686 
2687 #endif
2688 }
2689 
2690 #endif // 0
2691 
2694 
2698 BOOLEAN SuperblockContainsMagicKey(PRFSD_SUPER_BLOCK sb)
2699 {
2700 #define MAGIC_KEY_LENGTH 9
2701 
2702  UCHAR sz_MagicKey[] = REISER2FS_SUPER_MAGIC_STRING;
2703 #ifndef __REACTOS__
2704  BOOLEAN b_KeyMatches = TRUE;
2705 #endif
2706  UCHAR currentChar;
2707  int i;
2708 
2709  PAGED_CODE();
2710 
2711  // If any characters read from disk don't match the expected magic key, we don't have a ReiserFS volume.
2712  for (i = 0; i < MAGIC_KEY_LENGTH; i++)
2713  {
2714  currentChar = sb->s_magic[i];
2715  if (currentChar != sz_MagicKey[i])
2716  { return FALSE; }
2717  }
2718 
2719  return TRUE;
2720 }
2721 
2722 
2723 
2724 /*
2725 ______________________________________________________________________________
2726  _ __ _ _ _ _ _
2727 | |/ /___ _ _ | | | | |_(_) |___
2728 | ' // _ \ | | | | | | | __| | / __|
2729 | . \ __/ |_| | | |_| | |_| | \__ \
2730 |_|\_\___|\__, | \___/ \__|_|_|___/
2731  |___/
2732 ______________________________________________________________________________
2733 */
2734 
2735 
2743 RFSD_KEY_VERSION DetermineOnDiskKeyFormat(const PRFSD_KEY_ON_DISK key)
2744 {
2745  int type = (int) key->u.k_offset_v2.k_type;
2746 
2747  PAGED_CODE();
2748 
2749  if ( type == 0x0 || type == 0xF )
2750  return RFSD_KEY_VERSION_1;
2751 
2752  return RFSD_KEY_VERSION_2;
2753 }
2754 
2755 
2757 __u32
2758 ConvertKeyTypeUniqueness(__u32 k_uniqueness)
2759 {
2760  switch (k_uniqueness)
2761  {
2762  case RFSD_KEY_TYPE_v1_STAT_DATA: return RFSD_KEY_TYPE_v2_STAT_DATA;
2763  case RFSD_KEY_TYPE_v1_INDIRECT: return RFSD_KEY_TYPE_v2_INDIRECT;
2764  case RFSD_KEY_TYPE_v1_DIRECT: return RFSD_KEY_TYPE_v2_DIRECT;
2765  case RFSD_KEY_TYPE_v1_DIRENTRY: return RFSD_KEY_TYPE_v2_DIRENTRY;
2766 
2767  default:
2768  RfsdPrint((DBG_ERROR, "Unexpected uniqueness value %i", k_uniqueness));
2769  // NOTE: If above value is 555, it's the 'any' value, which I'd be surprised to see on disk.
2770  DbgBreak();
2771  return 0xF; // We'll return v2 'any', just to see what happens...
2772  }
2773 }
2774 
2776 void
2777 FillInMemoryKey(
2778  IN PRFSD_KEY_ON_DISK pKeyOnDisk,
2779  IN RFSD_KEY_VERSION KeyVersion,
2780  IN OUT PRFSD_KEY_IN_MEMORY pKeyInMemory )
2781 {
2782  PAGED_CODE();
2783 
2784  // Sanity check that the input and output locations exist
2785  if (!pKeyOnDisk || !pKeyInMemory) { DbgBreak(); return; }
2786 
2787  // Copy over the fields that are compatible between keys
2788  pKeyInMemory->k_dir_id = pKeyOnDisk->k_dir_id;
2789  pKeyInMemory->k_objectid = pKeyOnDisk->k_objectid;
2790 
2791  if (KeyVersion == RFSD_KEY_VERSION_UNKNOWN)
2792  { KeyVersion = DetermineOnDiskKeyFormat(pKeyOnDisk); }
2793 
2794  // Copy over the fields that are incompatible between keys, converting older type fields to the v2 format
2795  switch (KeyVersion)
2796  {
2797  case RFSD_KEY_VERSION_1:
2798  pKeyInMemory->k_offset = pKeyOnDisk->u.k_offset_v1.k_offset;
2799  pKeyInMemory->k_type = ConvertKeyTypeUniqueness( pKeyOnDisk->u.k_offset_v1.k_uniqueness );
2800  break;
2801 
2802  case RFSD_KEY_VERSION_2:
2803  pKeyInMemory->k_offset = pKeyOnDisk->u.k_offset_v2.k_offset;
2804  pKeyInMemory->k_type = (__u32) pKeyOnDisk->u.k_offset_v2.k_type;
2805  break;
2806  }
2807 }
2808 
2810 RFSD_KEY_COMPARISON
2811 CompareShortKeys(
2812  IN PRFSD_KEY_IN_MEMORY a,
2813  IN PRFSD_KEY_IN_MEMORY b )
2814 {
2815  PAGED_CODE();
2816 
2817  // compare 1. integer
2818  if( a->k_dir_id < b->k_dir_id ) return RFSD_KEY_SMALLER;
2819  if( a->k_dir_id > b->k_dir_id ) return RFSD_KEY_LARGER;
2820 
2821  // compare 2. integer
2822  if( a->k_objectid < b->k_objectid ) return RFSD_KEY_SMALLER;
2823  if( a->k_objectid > b->k_objectid ) return RFSD_KEY_LARGER;
2824 
2825  return RFSD_KEYS_MATCH;
2826 }
2827 
2828 
2830 RFSD_KEY_COMPARISON
2831 CompareKeysWithoutOffset(
2832  IN PRFSD_KEY_IN_MEMORY a,
2833  IN PRFSD_KEY_IN_MEMORY b )
2834 {
2835  PAGED_CODE();
2836 
2837  // compare 1. integer
2838  if( a->k_dir_id < b->k_dir_id ) return RFSD_KEY_SMALLER;
2839  if( a->k_dir_id > b->k_dir_id ) return RFSD_KEY_LARGER;
2840 
2841  // compare 2. integer
2842  if( a->k_objectid < b->k_objectid ) return RFSD_KEY_SMALLER;
2843  if( a->k_objectid > b->k_objectid ) return RFSD_KEY_LARGER;
2844 
2845  // compare 4. integer
2846  // NOTE: Buchholz says that if we get to here in navigating the file tree, something has gone wrong...
2847  if( a->k_type < b->k_type ) return RFSD_KEY_SMALLER;
2848  if( a->k_type > b->k_type ) return RFSD_KEY_LARGER;
2849 
2850  return RFSD_KEYS_MATCH;
2851 }
2852 
2853 
2855 RFSD_KEY_COMPARISON
2856 CompareKeys(
2857  IN PRFSD_KEY_IN_MEMORY a,
2858  IN PRFSD_KEY_IN_MEMORY b )
2859 {
2860  PAGED_CODE();
2861 
2862  // compare 1. integer
2863  if( a->k_dir_id < b->k_dir_id ) return RFSD_KEY_SMALLER;
2864  if( a->k_dir_id > b->k_dir_id ) return RFSD_KEY_LARGER;
2865 
2866  // compare 2. integer
2867  if( a->k_objectid < b->k_objectid ) return RFSD_KEY_SMALLER;
2868  if( a->k_objectid > b->k_objectid ) return RFSD_KEY_LARGER;
2869 
2870  // compare 3. integer
2871  if( a->k_offset < b->k_offset ) return RFSD_KEY_SMALLER;
2872  if( a->k_offset > b->k_offset ) return RFSD_KEY_LARGER;
2873 
2874  // compare 4. integer
2875  // NOTE: Buchholz says that if we get to here in navigating the file tree, something has gone wrong...
2876  if( a->k_type < b->k_type ) return RFSD_KEY_SMALLER;
2877  if( a->k_type > b->k_type ) return RFSD_KEY_LARGER;
2878 
2879  return RFSD_KEYS_MATCH;
2880 }
2881 
2882 
2883 
2884 /*
2885 ______________________________________________________________________________
2886  _____ _ _ _ _ _
2887 |_ _| __ ___ ___ | \ | | __ ___ _(_) __ _ __ _| |_(_) ___ _ __
2888  | || '__/ _ \/ _ \ | \| |/ _` \ \ / / |/ _` |/ _` | __| |/ _ \| '_ \
2889  | || | | __/ __/ | |\ | (_| |\ V /| | (_| | (_| | |_| | (_) | | | |
2890  |_||_| \___|\___| |_| \_|\__,_| \_/ |_|\__, |\__,_|\__|_|\___/|_| |_|
2891  |___/
2892 ______________________________________________________________________________
2893 */
2894 
2895 NTSTATUS
2896 NavigateToLeafNode(
2897  IN PRFSD_VCB Vcb,
2898  IN PRFSD_KEY_IN_MEMORY Key, // Key to search for.
2899  IN ULONG StartingBlockNumber, // Block number of an internal or leaf node, to start the search from
2900  OUT PULONG out_NextBlockNumber // Block number of the leaf node that contains Key
2901  )
2902 {
2903  PAGED_CODE();
2904 
2905  return _NavigateToLeafNode(Vcb, Key, StartingBlockNumber, out_NextBlockNumber, TRUE, &CompareKeys, NULL, NULL);
2906 }
2907 
2908 NTSTATUS
2909 RfsdParseFilesystemTree(
2910  IN PRFSD_VCB Vcb,
2911  IN PRFSD_KEY_IN_MEMORY Key, // Key to search for.
2912  IN ULONG StartingBlockNumber, // Block number of an internal or leaf node, to start the search from
2913  IN RFSD_CALLBACK(fpDirectoryCallback), // A function ptr to trigger on hitting a matching leaf block
2914  IN PVOID pContext // This context item will simply be passed through to the callback when invoked
2915  )
2916 {
2917  ULONG out = 0;
2918 
2919  PAGED_CODE();
2920 
2921  return _NavigateToLeafNode(Vcb, Key, StartingBlockNumber, &out, FALSE, &CompareShortKeys, fpDirectoryCallback, pContext);
2922 }
2923 
2924 
2933 NTSTATUS
2934 _NavigateToLeafNode(
2935  IN PRFSD_VCB Vcb,
2936  IN PRFSD_KEY_IN_MEMORY Key, // Key to search for.
2937  IN ULONG StartingBlockNumber, // Block number of an internal or leaf node, to start the search from
2938  OUT PULONG out_NextBlockNumber, // Block number of the leaf node that contains Key (when a callback is in use, this is typically ignored -- it returns the block number at which the callback was last triggered)
2939  IN BOOLEAN ReturnOnFirstMatch, // Whether or not the function should return upon finding the first leaf node containing the Key
2940  IN RFSD_KEY_COMPARISON (*fpComparisonFunction)(PRFSD_KEY_IN_MEMORY, PRFSD_KEY_IN_MEMORY),
2941  RFSD_CALLBACK(fpDirectoryCallback), // A function ptr to trigger on hitting a matching leaf block
2942  IN PVOID pContext // This context item will simply be passed through to the callback when invoked
2943 
2944 
2945  )
2946 {
2947  NTSTATUS Status = STATUS_SUCCESS;
2948  ULONG leafNodeBlockNumber; // The result to be calculated
2949  PRFSD_DISK_NODE_REF pTargetDiskNodeReference = NULL; //
2950 
2951  // Read in this disk node's data
2952  PUCHAR pBlockBuffer = RfsdAllocateAndLoadBlock(Vcb, StartingBlockNumber);
2953 
2954  // Read the block header
2955  PRFSD_BLOCK_HEAD pBlockHeader = (PRFSD_BLOCK_HEAD) pBlockBuffer;
2956 
2957  PAGED_CODE();
2958 
2959  // Sanity check that we could read the block and the header is there
2960  if (!pBlockBuffer) { return STATUS_INVALID_HANDLE; }
2961 
2962  // If this block is a leaf, just return it (or invoke the given callback on the leaf block)
2963  if (pBlockHeader->blk_level == RFSD_LEAF_BLOCK_LEVEL)
2964  {
2965  NTSTATUS CallbackStatus;
2966 
2967  ExFreePool(pBlockBuffer);
2968 
2969  *out_NextBlockNumber = StartingBlockNumber;
2970 
2971  // If a callback should be invoked on finding a matching leaf node, do so...
2972  if (fpDirectoryCallback) return (*fpDirectoryCallback)(StartingBlockNumber, pContext);
2973  else return STATUS_SUCCESS;
2974  }
2975 
2976  // Otherwise, find the next node down in the tree, by obtaining pTargetDiskNodeReference
2977  {
2978  ULONG idxRightKey = 0;
2979  PRFSD_KEY_ON_DISK pLeftKeyOnDisk = NULL;
2980  PRFSD_KEY_ON_DISK pRightKeyOnDisk = NULL;
2981 
2982  RFSD_KEY_IN_MEMORY LeftKeyInMemory, RightKeyInMemory;
2983  RFSD_KEY_COMPARISON leftComparison, rightComparison;
2984 
2985  RightKeyInMemory.k_dir_id = 0; // (Dummy statement to prevent needless warning aboujt using RightKeyInMemory before being initialized)
2986 
2987  // Search (within the increasing list of target Keys), for the target key that Key is <= to.
2988  for (idxRightKey = 0; idxRightKey <= pBlockHeader->blk_nr_item; idxRightKey++)
2989  {
2990  // Advance the left key to become what was the right key, and the right key to become the next key
2991  pLeftKeyOnDisk = pRightKeyOnDisk;
2992  pRightKeyOnDisk = (idxRightKey == pBlockHeader->blk_nr_item) ?
2993  (PRFSD_KEY_ON_DISK) NULL :
2994  (PRFSD_KEY_ON_DISK) (pBlockBuffer + sizeof(RFSD_BLOCK_HEAD) + (idxRightKey * sizeof(RFSD_KEY_ON_DISK)));
2995 
2996  LeftKeyInMemory = RightKeyInMemory;
2997  if (pRightKeyOnDisk)
2998  FillInMemoryKey(pRightKeyOnDisk, RFSD_KEY_VERSION_UNKNOWN, &(RightKeyInMemory));
2999 
3000 
3001  // Find if the target key falls in the range in between the left and right keys...
3002  {
3003  // We must be smaller than the right key (if it exists). However, we will allow the key to match if short key comparisons are in use.
3004  rightComparison = pRightKeyOnDisk ? ((*fpComparisonFunction)(Key, &RightKeyInMemory)) : RFSD_KEY_SMALLER;
3005  if (fpComparisonFunction == &CompareShortKeys)
3006  { if (rightComparison == RFSD_KEY_LARGER) continue; }
3007  else
3008  { if (rightComparison != RFSD_KEY_SMALLER) continue; }
3009 
3010  // And larger than or equal to the left key.
3011  leftComparison = pLeftKeyOnDisk ? ((*fpComparisonFunction)(Key, &LeftKeyInMemory)) : RFSD_KEY_LARGER;
3012  if ( (leftComparison == RFSD_KEY_LARGER) || (leftComparison == RFSD_KEYS_MATCH) )
3013  {
3014  // The target range has been found. Read the reference to the disk node child, lower in the tree.
3015  // This returns the pointer preceding the righthand key.
3016  pTargetDiskNodeReference = (PRFSD_DISK_NODE_REF) (pBlockBuffer
3017  + sizeof(RFSD_BLOCK_HEAD) + (pBlockHeader->blk_nr_item * sizeof(RFSD_KEY_ON_DISK)) + (idxRightKey * sizeof(RFSD_DISK_NODE_REF)));
3018 
3019  // Continue recursion downwards; eventually a leaf node will be returned.
3020  Status = _NavigateToLeafNode(
3021  Vcb, Key, pTargetDiskNodeReference->dc_block_number,
3022  &(leafNodeBlockNumber),
3023  ReturnOnFirstMatch, fpComparisonFunction, fpDirectoryCallback, pContext); // <
3024 
3025  if (ReturnOnFirstMatch || Status == STATUS_EVENT_DONE || // Success cases
3026  Status == STATUS_INSUFFICIENT_RESOURCES || Status == STATUS_INVALID_HANDLE) // Error cases
3027  { goto return_results; }
3028  }
3029  }
3030  }
3031  }
3032 
3033 return_results:
3034 
3035  ExFreePool(pBlockBuffer);
3036  *out_NextBlockNumber = leafNodeBlockNumber;
3037  return Status;
3038 }
KeQuerySystemTime
#define KeQuerySystemTime(t)
Definition: env_spec_w32.h:570
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FxIoTarget * pTarget
Definition: fxdeviceapi.cpp:97
RFSD_NAME_LEN
#define RFSD_NAME_LEN
Definition: rfsd.h:45
RFSD_KEY_TYPE_v1_DIRENTRY
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Definition: reiserfs.h:280
ExGetCurrentResourceThread
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Definition: env_spec_w32.h:633
PRFSD_SUPER_BLOCK
struct _RFSD_SUPER_BLOCK * PRFSD_SUPER_BLOCK
RfsdUnicodeToOEM
NTSTATUS RfsdUnicodeToOEM(IN OUT POEM_STRING Oem, IN PUNICODE_STRING Unicode)
Definition: misc.c:246
RfsdFreeBlock
NTSTATUS RfsdFreeBlock(PRFSD_IRP_CONTEXT IrpContext, PRFSD_VCB Vcb, ULONG Block)
IN
#define IN
Definition: typedefs.h:39
RfsdAddEntry
NTSTATUS RfsdAddEntry(IN PRFSD_IRP_CONTEXT IrpContext, IN PRFSD_VCB Vcb, IN PRFSD_FCB Dcb, IN ULONG FileType, IN ULONG Inode, IN PUNICODE_STRING FileName)
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__u16 RFSD_KEY_VERSION
Definition: rfsd.h:56
RFSD_KEY_ON_DISK
struct reiserfs_key RFSD_KEY_ON_DISK
Definition: rfsd.h:41
REISER2FS_SUPER_MAGIC_STRING
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Definition: reiserfs.h:74
RfsdReadDisk
NTSTATUS RfsdReadDisk(IN PRFSD_VCB Vcb, IN ULONGLONG Offset, IN ULONG Size, IN PVOID Buffer, IN BOOLEAN bVerify)
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Definition: udferr_usr.h:158
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_In_ ULONG _In_ ULONG _In_ ULONG Length
Definition: ntddpcm.h:101
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IN PVCB IN VBO IN ULONG OUT PBCB * Bcb
Definition: fatprocs.h:411
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Definition: ntstatus.h:611
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Definition: rfsd.h:833
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Definition: linetemp.h:95
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Definition: cdstruc.h:925
RfsdSetParentEntry
NTSTATUS RfsdSetParentEntry(IN PRFSD_IRP_CONTEXT IrpContext, IN PRFSD_VCB Vcb, IN PRFSD_FCB Dcb, IN ULONG OldParent, IN ULONG NewParent)
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IN BOOLEAN OUT PSTR Buffer
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RFSD_KEY_TYPE_v2_STAT_DATA
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Definition: types.h:120
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Definition: btrfs.c:4220
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Definition: udferr_usr.h:135
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Definition: largemcb.c:905
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Definition: precomp.h:26
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Definition: rfsd.c:2831
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Definition: ext2fs.h:177
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Definition: excpt.h:85
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Definition: ext2fs.h:90
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Definition: verify.c:27
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Definition: rfsd.h:64
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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 GLint GLint j
Definition: glfuncs.h:250
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Definition: Type.h:6
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__u32 ConvertKeyTypeUniqueness(__u32 k_uniqueness)
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__u32
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Definition: largemcb.c:288
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_In_ FLT_PREOP_CALLBACK_STATUS CallbackStatus
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Definition: rfsd.h:1069
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__u64 k_offset
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Definition: dem.c:247
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Definition: reiserfs_fs.h:450
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_In_ ULONG _In_ ULONG Offset
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Definition: typedefs.h:80
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Definition: ext2fs.h:187
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Definition: largemcb.c:560
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Definition: create.c:4400
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i
GLsizei GLenum const GLvoid GLsizei GLenum GLbyte GLbyte GLbyte GLdouble GLdouble GLdouble GLfloat GLfloat GLfloat GLint GLint GLint GLshort GLshort GLshort GLubyte GLubyte GLubyte GLuint GLuint GLuint GLushort GLushort GLushort GLbyte GLbyte GLbyte GLbyte GLdouble GLdouble GLdouble GLdouble GLfloat GLfloat GLfloat GLfloat GLint GLint GLint GLint GLshort GLshort GLshort GLshort GLubyte GLubyte GLubyte GLubyte GLuint GLuint GLuint GLuint GLushort GLushort GLushort GLushort GLboolean const GLdouble const GLfloat const GLint const GLshort const GLbyte const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLdouble const GLfloat const GLfloat const GLint const GLint const GLshort const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort GLenum GLenum GLenum GLfloat GLenum GLint GLenum GLenum GLenum GLfloat GLenum GLenum GLint GLenum GLfloat GLenum GLint GLint GLushort GLenum GLenum GLfloat GLenum GLenum GLint GLfloat const GLubyte GLenum GLenum GLenum const GLfloat GLenum GLenum const GLint GLenum GLint GLint GLsizei GLsizei GLint GLenum GLenum const GLvoid GLenum GLenum const GLfloat GLenum GLenum const GLint GLenum GLenum const GLdouble GLenum GLenum const GLfloat GLenum GLenum const GLint GLsizei GLuint GLfloat GLuint GLbitfield GLfloat GLint GLuint GLboolean GLenum GLfloat GLenum GLbitfield GLenum GLfloat GLfloat GLint GLint const GLfloat GLenum GLfloat GLfloat GLint GLint GLfloat GLfloat GLint GLint const GLfloat GLint GLfloat GLfloat GLint GLfloat GLfloat GLint GLfloat GLfloat const GLdouble const GLfloat const GLdouble const GLfloat GLint i
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Definition: rfsd.c:2856
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Definition: typedefs.h:102
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Definition: reiserfs.h:284
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Definition: rfsd.h:38
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Definition: rfsd.c:2896
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Definition: rfsd.h:58
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Definition: typedefs.h:40
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Definition: rfsd.h:479
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Definition: udferr_usr.h:155
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Definition: reiserfs_fs.h:678
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...
Definition: reiserfs_fs.h:518
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Definition: ext2fs.h:46
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union item_head::@770 u
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Definition: rfsd.c:253
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Definition: rfsd.h:752
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