2 * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
4 * Copyright (C) 2002-2007 Aleph One Ltd.
5 * for Toby Churchill Ltd and Brightstar Engineering
7 * Created by Charles Manning <charles@aleph1.co.uk>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
14 const char *yaffs_guts_c_version =
15 "$Id: yaffs_guts.c,v 1.100 2009-12-22 04:09:06 charles Exp $";
19 #include "yaffsinterface.h"
20 #include "yaffs_guts.h"
21 #include "yaffs_tagsvalidity.h"
22 #include "yaffs_getblockinfo.h"
24 #include "yaffs_tagscompat.h"
25 #ifndef CONFIG_YAFFS_USE_OWN_SORT
26 #include "yaffs_qsort.h"
28 #include "yaffs_nand.h"
30 #include "yaffs_checkptrw.h"
32 #include "yaffs_nand.h"
33 #include "yaffs_packedtags2.h"
36 #define YAFFS_PASSIVE_GC_CHUNKS 2
38 #include "yaffs_ecc.h"
41 /* Robustification (if it ever comes about...) */
42 static void yaffs_RetireBlock(yaffs_Device *dev, int blockInNAND);
43 static void yaffs_HandleWriteChunkError(yaffs_Device *dev, int chunkInNAND,
45 static void yaffs_HandleWriteChunkOk(yaffs_Device *dev, int chunkInNAND,
47 const yaffs_ExtendedTags *tags);
48 static void yaffs_HandleUpdateChunk(yaffs_Device *dev, int chunkInNAND,
49 const yaffs_ExtendedTags *tags);
51 /* Other local prototypes */
52 static void yaffs_UpdateParent(yaffs_Object *obj);
53 static int yaffs_UnlinkObject(yaffs_Object *obj);
54 static int yaffs_ObjectHasCachedWriteData(yaffs_Object *obj);
56 static void yaffs_HardlinkFixup(yaffs_Device *dev, yaffs_Object *hardList);
58 static int yaffs_WriteNewChunkWithTagsToNAND(yaffs_Device *dev,
60 yaffs_ExtendedTags *tags,
62 static int yaffs_PutChunkIntoFile(yaffs_Object *in, int chunkInInode,
63 int chunkInNAND, int inScan);
65 static yaffs_Object *yaffs_CreateNewObject(yaffs_Device *dev, int number,
66 yaffs_ObjectType type);
67 static void yaffs_AddObjectToDirectory(yaffs_Object *directory,
69 static int yaffs_UpdateObjectHeader(yaffs_Object *in, const YCHAR *name,
70 int force, int isShrink, int shadows);
71 static void yaffs_RemoveObjectFromDirectory(yaffs_Object *obj);
72 static int yaffs_CheckStructures(void);
73 static int yaffs_DeleteWorker(yaffs_Object *in, yaffs_Tnode *tn, __u32 level,
74 int chunkOffset, int *limit);
75 static int yaffs_DoGenericObjectDeletion(yaffs_Object *in);
77 static yaffs_BlockInfo *yaffs_GetBlockInfo(yaffs_Device *dev, int blockNo);
80 static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,
83 static int yaffs_UnlinkWorker(yaffs_Object *obj);
85 static int yaffs_TagsMatch(const yaffs_ExtendedTags *tags, int objectId,
88 static int yaffs_AllocateChunk(yaffs_Device *dev, int useReserve,
89 yaffs_BlockInfo **blockUsedPtr);
91 static void yaffs_VerifyFreeChunks(yaffs_Device *dev);
93 static void yaffs_CheckObjectDetailsLoaded(yaffs_Object *in);
95 static void yaffs_VerifyDirectory(yaffs_Object *directory);
97 static int yaffs_CheckFileSanity(yaffs_Object *in);
99 #define yaffs_CheckFileSanity(in)
102 static void yaffs_InvalidateWholeChunkCache(yaffs_Object *in);
103 static void yaffs_InvalidateChunkCache(yaffs_Object *object, int chunkId);
105 static void yaffs_InvalidateCheckpoint(yaffs_Device *dev);
107 static int yaffs_FindChunkInFile(yaffs_Object *in, int chunkInInode,
108 yaffs_ExtendedTags *tags);
110 static __u32 yaffs_GetChunkGroupBase(yaffs_Device *dev, yaffs_Tnode *tn,
112 static yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device *dev,
113 yaffs_FileStructure *fStruct,
116 static void yaffs_SkipRestOfBlock(yaffs_Device *dev);
117 static int yaffs_VerifyChunkWritten(yaffs_Device *dev,
120 yaffs_ExtendedTags *tags);
122 /* Function to calculate chunk and offset */
124 static void yaffs_AddrToChunk(yaffs_Device *dev, loff_t addr, int *chunkOut,
130 chunk = (__u32)(addr >> dev->chunkShift);
132 if (dev->chunkDiv == 1) {
133 /* easy power of 2 case */
134 offset = (__u32)(addr & dev->chunkMask);
136 /* Non power-of-2 case */
140 chunk /= dev->chunkDiv;
142 chunkBase = ((loff_t)chunk) * dev->nDataBytesPerChunk;
143 offset = (__u32)(addr - chunkBase);
150 /* Function to return the number of shifts for a power of 2 greater than or
151 * equal to the given number
152 * Note we don't try to cater for all possible numbers and this does not have to
153 * be hellishly efficient.
156 static __u32 ShiftsGE(__u32 x)
161 nShifts = extraBits = 0;
176 /* Function to return the number of shifts to get a 1 in bit 0
179 static __u32 Shifts(__u32 x)
199 * Temporary buffer manipulations.
202 static int yaffs_InitialiseTempBuffers(yaffs_Device *dev)
205 __u8 *buf = (__u8 *)1;
207 memset(dev->tempBuffer, 0, sizeof(dev->tempBuffer));
209 for (i = 0; buf && i < YAFFS_N_TEMP_BUFFERS; i++) {
210 dev->tempBuffer[i].line = 0; /* not in use */
211 dev->tempBuffer[i].buffer = buf =
212 YMALLOC_DMA(dev->totalBytesPerChunk);
215 return buf ? YAFFS_OK : YAFFS_FAIL;
218 __u8 *yaffs_GetTempBuffer(yaffs_Device *dev, int lineNo)
223 if (dev->tempInUse > dev->maxTemp)
224 dev->maxTemp = dev->tempInUse;
226 for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) {
227 if (dev->tempBuffer[i].line == 0) {
228 dev->tempBuffer[i].line = lineNo;
229 if ((i + 1) > dev->maxTemp) {
230 dev->maxTemp = i + 1;
231 for (j = 0; j <= i; j++)
232 dev->tempBuffer[j].maxLine =
233 dev->tempBuffer[j].line;
236 return dev->tempBuffer[i].buffer;
240 T(YAFFS_TRACE_BUFFERS,
241 (TSTR("Out of temp buffers at line %d, other held by lines:"),
243 for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++)
244 T(YAFFS_TRACE_BUFFERS, (TSTR(" %d "), dev->tempBuffer[i].line));
246 T(YAFFS_TRACE_BUFFERS, (TSTR(" " TENDSTR)));
249 * If we got here then we have to allocate an unmanaged one
253 dev->unmanagedTempAllocations++;
254 return YMALLOC(dev->nDataBytesPerChunk);
258 void yaffs_ReleaseTempBuffer(yaffs_Device *dev, __u8 *buffer,
265 for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) {
266 if (dev->tempBuffer[i].buffer == buffer) {
267 dev->tempBuffer[i].line = 0;
273 /* assume it is an unmanaged one. */
274 T(YAFFS_TRACE_BUFFERS,
275 (TSTR("Releasing unmanaged temp buffer in line %d" TENDSTR),
278 dev->unmanagedTempDeallocations++;
284 * Determine if we have a managed buffer.
286 int yaffs_IsManagedTempBuffer(yaffs_Device *dev, const __u8 *buffer)
290 for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) {
291 if (dev->tempBuffer[i].buffer == buffer)
295 for (i = 0; i < dev->nShortOpCaches; i++) {
296 if (dev->srCache[i].data == buffer)
300 if (buffer == dev->checkpointBuffer)
303 T(YAFFS_TRACE_ALWAYS,
304 (TSTR("yaffs: unmaged buffer detected.\n" TENDSTR)));
311 * Chunk bitmap manipulations
314 static Y_INLINE __u8 *yaffs_BlockBits(yaffs_Device *dev, int blk)
316 if (blk < dev->internalStartBlock || blk > dev->internalEndBlock) {
318 (TSTR("**>> yaffs: BlockBits block %d is not valid" TENDSTR),
322 return dev->chunkBits +
323 (dev->chunkBitmapStride * (blk - dev->internalStartBlock));
326 static Y_INLINE void yaffs_VerifyChunkBitId(yaffs_Device *dev, int blk, int chunk)
328 if (blk < dev->internalStartBlock || blk > dev->internalEndBlock ||
329 chunk < 0 || chunk >= dev->nChunksPerBlock) {
331 (TSTR("**>> yaffs: Chunk Id (%d:%d) invalid"TENDSTR),
337 static Y_INLINE void yaffs_ClearChunkBits(yaffs_Device *dev, int blk)
339 __u8 *blkBits = yaffs_BlockBits(dev, blk);
341 memset(blkBits, 0, dev->chunkBitmapStride);
344 static Y_INLINE void yaffs_ClearChunkBit(yaffs_Device *dev, int blk, int chunk)
346 __u8 *blkBits = yaffs_BlockBits(dev, blk);
348 yaffs_VerifyChunkBitId(dev, blk, chunk);
350 blkBits[chunk / 8] &= ~(1 << (chunk & 7));
353 static Y_INLINE void yaffs_SetChunkBit(yaffs_Device *dev, int blk, int chunk)
355 __u8 *blkBits = yaffs_BlockBits(dev, blk);
357 yaffs_VerifyChunkBitId(dev, blk, chunk);
359 blkBits[chunk / 8] |= (1 << (chunk & 7));
362 static Y_INLINE int yaffs_CheckChunkBit(yaffs_Device *dev, int blk, int chunk)
364 __u8 *blkBits = yaffs_BlockBits(dev, blk);
365 yaffs_VerifyChunkBitId(dev, blk, chunk);
367 return (blkBits[chunk / 8] & (1 << (chunk & 7))) ? 1 : 0;
370 static Y_INLINE int yaffs_StillSomeChunkBits(yaffs_Device *dev, int blk)
372 __u8 *blkBits = yaffs_BlockBits(dev, blk);
374 for (i = 0; i < dev->chunkBitmapStride; i++) {
382 static int yaffs_CountChunkBits(yaffs_Device *dev, int blk)
384 __u8 *blkBits = yaffs_BlockBits(dev, blk);
387 for (i = 0; i < dev->chunkBitmapStride; i++) {
404 static int yaffs_SkipVerification(yaffs_Device *dev)
406 return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY | YAFFS_TRACE_VERIFY_FULL));
409 static int yaffs_SkipFullVerification(yaffs_Device *dev)
411 return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY_FULL));
414 static int yaffs_SkipNANDVerification(yaffs_Device *dev)
416 return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY_NAND));
419 static const char *blockStateName[] = {
432 static void yaffs_VerifyBlock(yaffs_Device *dev, yaffs_BlockInfo *bi, int n)
437 if (yaffs_SkipVerification(dev))
440 /* Report illegal runtime states */
441 if (bi->blockState >= YAFFS_NUMBER_OF_BLOCK_STATES)
442 T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has undefined state %d"TENDSTR), n, bi->blockState));
444 switch (bi->blockState) {
445 case YAFFS_BLOCK_STATE_UNKNOWN:
446 case YAFFS_BLOCK_STATE_SCANNING:
447 case YAFFS_BLOCK_STATE_NEEDS_SCANNING:
448 T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has bad run-state %s"TENDSTR),
449 n, blockStateName[bi->blockState]));
452 /* Check pages in use and soft deletions are legal */
454 actuallyUsed = bi->pagesInUse - bi->softDeletions;
456 if (bi->pagesInUse < 0 || bi->pagesInUse > dev->nChunksPerBlock ||
457 bi->softDeletions < 0 || bi->softDeletions > dev->nChunksPerBlock ||
458 actuallyUsed < 0 || actuallyUsed > dev->nChunksPerBlock)
459 T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has illegal values pagesInUsed %d softDeletions %d"TENDSTR),
460 n, bi->pagesInUse, bi->softDeletions));
463 /* Check chunk bitmap legal */
464 inUse = yaffs_CountChunkBits(dev, n);
465 if (inUse != bi->pagesInUse)
466 T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has inconsistent values pagesInUse %d counted chunk bits %d"TENDSTR),
467 n, bi->pagesInUse, inUse));
469 /* Check that the sequence number is valid.
470 * Ten million is legal, but is very unlikely
473 (bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING || bi->blockState == YAFFS_BLOCK_STATE_FULL) &&
474 (bi->sequenceNumber < YAFFS_LOWEST_SEQUENCE_NUMBER || bi->sequenceNumber > 10000000))
475 T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has suspect sequence number of %d"TENDSTR),
476 n, bi->sequenceNumber));
479 static void yaffs_VerifyCollectedBlock(yaffs_Device *dev, yaffs_BlockInfo *bi,
482 yaffs_VerifyBlock(dev, bi, n);
484 /* After collection the block should be in the erased state */
485 /* This will need to change if we do partial gc */
487 if (bi->blockState != YAFFS_BLOCK_STATE_COLLECTING &&
488 bi->blockState != YAFFS_BLOCK_STATE_EMPTY) {
489 T(YAFFS_TRACE_ERROR, (TSTR("Block %d is in state %d after gc, should be erased"TENDSTR),
494 static void yaffs_VerifyBlocks(yaffs_Device *dev)
497 int nBlocksPerState[YAFFS_NUMBER_OF_BLOCK_STATES];
498 int nIllegalBlockStates = 0;
500 if (yaffs_SkipVerification(dev))
503 memset(nBlocksPerState, 0, sizeof(nBlocksPerState));
505 for (i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) {
506 yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, i);
507 yaffs_VerifyBlock(dev, bi, i);
509 if (bi->blockState < YAFFS_NUMBER_OF_BLOCK_STATES)
510 nBlocksPerState[bi->blockState]++;
512 nIllegalBlockStates++;
515 T(YAFFS_TRACE_VERIFY, (TSTR(""TENDSTR)));
516 T(YAFFS_TRACE_VERIFY, (TSTR("Block summary"TENDSTR)));
518 T(YAFFS_TRACE_VERIFY, (TSTR("%d blocks have illegal states"TENDSTR), nIllegalBlockStates));
519 if (nBlocksPerState[YAFFS_BLOCK_STATE_ALLOCATING] > 1)
520 T(YAFFS_TRACE_VERIFY, (TSTR("Too many allocating blocks"TENDSTR)));
522 for (i = 0; i < YAFFS_NUMBER_OF_BLOCK_STATES; i++)
523 T(YAFFS_TRACE_VERIFY,
524 (TSTR("%s %d blocks"TENDSTR),
525 blockStateName[i], nBlocksPerState[i]));
527 if (dev->blocksInCheckpoint != nBlocksPerState[YAFFS_BLOCK_STATE_CHECKPOINT])
528 T(YAFFS_TRACE_VERIFY,
529 (TSTR("Checkpoint block count wrong dev %d count %d"TENDSTR),
530 dev->blocksInCheckpoint, nBlocksPerState[YAFFS_BLOCK_STATE_CHECKPOINT]));
532 if (dev->nErasedBlocks != nBlocksPerState[YAFFS_BLOCK_STATE_EMPTY])
533 T(YAFFS_TRACE_VERIFY,
534 (TSTR("Erased block count wrong dev %d count %d"TENDSTR),
535 dev->nErasedBlocks, nBlocksPerState[YAFFS_BLOCK_STATE_EMPTY]));
537 if (nBlocksPerState[YAFFS_BLOCK_STATE_COLLECTING] > 1)
538 T(YAFFS_TRACE_VERIFY,
539 (TSTR("Too many collecting blocks %d (max is 1)"TENDSTR),
540 nBlocksPerState[YAFFS_BLOCK_STATE_COLLECTING]));
542 T(YAFFS_TRACE_VERIFY, (TSTR(""TENDSTR)));
547 * Verify the object header. oh must be valid, but obj and tags may be NULL in which
548 * case those tests will not be performed.
550 static void yaffs_VerifyObjectHeader(yaffs_Object *obj, yaffs_ObjectHeader *oh, yaffs_ExtendedTags *tags, int parentCheck)
552 if (obj && yaffs_SkipVerification(obj->myDev))
555 if (!(tags && obj && oh)) {
556 T(YAFFS_TRACE_VERIFY,
557 (TSTR("Verifying object header tags %p obj %p oh %p"TENDSTR),
562 if (oh->type <= YAFFS_OBJECT_TYPE_UNKNOWN ||
563 oh->type > YAFFS_OBJECT_TYPE_MAX)
564 T(YAFFS_TRACE_VERIFY,
565 (TSTR("Obj %d header type is illegal value 0x%x"TENDSTR),
566 tags->objectId, oh->type));
568 if (tags->objectId != obj->objectId)
569 T(YAFFS_TRACE_VERIFY,
570 (TSTR("Obj %d header mismatch objectId %d"TENDSTR),
571 tags->objectId, obj->objectId));
575 * Check that the object's parent ids match if parentCheck requested.
577 * Tests do not apply to the root object.
580 if (parentCheck && tags->objectId > 1 && !obj->parent)
581 T(YAFFS_TRACE_VERIFY,
582 (TSTR("Obj %d header mismatch parentId %d obj->parent is NULL"TENDSTR),
583 tags->objectId, oh->parentObjectId));
585 if (parentCheck && obj->parent &&
586 oh->parentObjectId != obj->parent->objectId &&
587 (oh->parentObjectId != YAFFS_OBJECTID_UNLINKED ||
588 obj->parent->objectId != YAFFS_OBJECTID_DELETED))
589 T(YAFFS_TRACE_VERIFY,
590 (TSTR("Obj %d header mismatch parentId %d parentObjectId %d"TENDSTR),
591 tags->objectId, oh->parentObjectId, obj->parent->objectId));
593 if (tags->objectId > 1 && oh->name[0] == 0) /* Null name */
594 T(YAFFS_TRACE_VERIFY,
595 (TSTR("Obj %d header name is NULL"TENDSTR),
598 if (tags->objectId > 1 && ((__u8)(oh->name[0])) == 0xff) /* Trashed name */
599 T(YAFFS_TRACE_VERIFY,
600 (TSTR("Obj %d header name is 0xFF"TENDSTR),
606 static int yaffs_VerifyTnodeWorker(yaffs_Object *obj, yaffs_Tnode *tn,
607 __u32 level, int chunkOffset)
610 yaffs_Device *dev = obj->myDev;
616 for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++) {
617 if (tn->internal[i]) {
618 ok = yaffs_VerifyTnodeWorker(obj,
621 (chunkOffset<<YAFFS_TNODES_INTERNAL_BITS) + i);
624 } else if (level == 0) {
625 yaffs_ExtendedTags tags;
626 __u32 objectId = obj->objectId;
628 chunkOffset <<= YAFFS_TNODES_LEVEL0_BITS;
630 for (i = 0; i < YAFFS_NTNODES_LEVEL0; i++) {
631 __u32 theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
634 /* T(~0,(TSTR("verifying (%d:%d) %d"TENDSTR),tags.objectId,tags.chunkId,theChunk)); */
635 yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL, &tags);
636 if (tags.objectId != objectId || tags.chunkId != chunkOffset) {
637 T(~0, (TSTR("Object %d chunkId %d NAND mismatch chunk %d tags (%d:%d)"TENDSTR),
638 objectId, chunkOffset, theChunk,
639 tags.objectId, tags.chunkId));
652 static void yaffs_VerifyFile(yaffs_Object *obj)
654 int requiredTallness;
660 yaffs_ExtendedTags tags;
667 if (yaffs_SkipVerification(obj->myDev))
671 objectId = obj->objectId;
673 /* Check file size is consistent with tnode depth */
674 lastChunk = obj->variant.fileVariant.fileSize / dev->nDataBytesPerChunk + 1;
675 x = lastChunk >> YAFFS_TNODES_LEVEL0_BITS;
676 requiredTallness = 0;
678 x >>= YAFFS_TNODES_INTERNAL_BITS;
682 actualTallness = obj->variant.fileVariant.topLevel;
684 if (requiredTallness > actualTallness)
685 T(YAFFS_TRACE_VERIFY,
686 (TSTR("Obj %d had tnode tallness %d, needs to be %d"TENDSTR),
687 obj->objectId, actualTallness, requiredTallness));
690 /* Check that the chunks in the tnode tree are all correct.
691 * We do this by scanning through the tnode tree and
692 * checking the tags for every chunk match.
695 if (yaffs_SkipNANDVerification(dev))
698 for (i = 1; i <= lastChunk; i++) {
699 tn = yaffs_FindLevel0Tnode(dev, &obj->variant.fileVariant, i);
702 __u32 theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
704 /* T(~0,(TSTR("verifying (%d:%d) %d"TENDSTR),objectId,i,theChunk)); */
705 yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL, &tags);
706 if (tags.objectId != objectId || tags.chunkId != i) {
707 T(~0, (TSTR("Object %d chunkId %d NAND mismatch chunk %d tags (%d:%d)"TENDSTR),
708 objectId, i, theChunk,
709 tags.objectId, tags.chunkId));
717 static void yaffs_VerifyHardLink(yaffs_Object *obj)
719 if (obj && yaffs_SkipVerification(obj->myDev))
722 /* Verify sane equivalent object */
725 static void yaffs_VerifySymlink(yaffs_Object *obj)
727 if (obj && yaffs_SkipVerification(obj->myDev))
730 /* Verify symlink string */
733 static void yaffs_VerifySpecial(yaffs_Object *obj)
735 if (obj && yaffs_SkipVerification(obj->myDev))
739 static void yaffs_VerifyObject(yaffs_Object *obj)
748 __u32 chunkShouldNotBeDeleted;
754 if (obj->beingCreated)
759 if (yaffs_SkipVerification(dev))
762 /* Check sane object header chunk */
764 chunkMin = dev->internalStartBlock * dev->nChunksPerBlock;
765 chunkMax = (dev->internalEndBlock+1) * dev->nChunksPerBlock - 1;
767 chunkInRange = (((unsigned)(obj->hdrChunk)) >= chunkMin && ((unsigned)(obj->hdrChunk)) <= chunkMax);
768 chunkIdOk = chunkInRange || (obj->hdrChunk == 0);
769 chunkValid = chunkInRange &&
770 yaffs_CheckChunkBit(dev,
771 obj->hdrChunk / dev->nChunksPerBlock,
772 obj->hdrChunk % dev->nChunksPerBlock);
773 chunkShouldNotBeDeleted = chunkInRange && !chunkValid;
776 (!chunkIdOk || chunkShouldNotBeDeleted)) {
777 T(YAFFS_TRACE_VERIFY,
778 (TSTR("Obj %d has chunkId %d %s %s"TENDSTR),
779 obj->objectId, obj->hdrChunk,
780 chunkIdOk ? "" : ",out of range",
781 chunkShouldNotBeDeleted ? ",marked as deleted" : ""));
784 if (chunkValid && !yaffs_SkipNANDVerification(dev)) {
785 yaffs_ExtendedTags tags;
786 yaffs_ObjectHeader *oh;
787 __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__);
789 oh = (yaffs_ObjectHeader *)buffer;
791 yaffs_ReadChunkWithTagsFromNAND(dev, obj->hdrChunk, buffer,
794 yaffs_VerifyObjectHeader(obj, oh, &tags, 1);
796 yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
799 /* Verify it has a parent */
800 if (obj && !obj->fake &&
801 (!obj->parent || obj->parent->myDev != dev)) {
802 T(YAFFS_TRACE_VERIFY,
803 (TSTR("Obj %d has parent pointer %p which does not look like an object"TENDSTR),
804 obj->objectId, obj->parent));
807 /* Verify parent is a directory */
808 if (obj->parent && obj->parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
809 T(YAFFS_TRACE_VERIFY,
810 (TSTR("Obj %d's parent is not a directory (type %d)"TENDSTR),
811 obj->objectId, obj->parent->variantType));
814 switch (obj->variantType) {
815 case YAFFS_OBJECT_TYPE_FILE:
816 yaffs_VerifyFile(obj);
818 case YAFFS_OBJECT_TYPE_SYMLINK:
819 yaffs_VerifySymlink(obj);
821 case YAFFS_OBJECT_TYPE_DIRECTORY:
822 yaffs_VerifyDirectory(obj);
824 case YAFFS_OBJECT_TYPE_HARDLINK:
825 yaffs_VerifyHardLink(obj);
827 case YAFFS_OBJECT_TYPE_SPECIAL:
828 yaffs_VerifySpecial(obj);
830 case YAFFS_OBJECT_TYPE_UNKNOWN:
832 T(YAFFS_TRACE_VERIFY,
833 (TSTR("Obj %d has illegaltype %d"TENDSTR),
834 obj->objectId, obj->variantType));
839 static void yaffs_VerifyObjects(yaffs_Device *dev)
843 struct ylist_head *lh;
845 if (yaffs_SkipVerification(dev))
848 /* Iterate through the objects in each hash entry */
850 for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
851 ylist_for_each(lh, &dev->objectBucket[i].list) {
853 obj = ylist_entry(lh, yaffs_Object, hashLink);
854 yaffs_VerifyObject(obj);
862 * Simple hash function. Needs to have a reasonable spread
865 static Y_INLINE int yaffs_HashFunction(int n)
868 return n % YAFFS_NOBJECT_BUCKETS;
872 * Access functions to useful fake objects.
873 * Note that root might have a presence in NAND if permissions are set.
876 yaffs_Object *yaffs_Root(yaffs_Device *dev)
881 yaffs_Object *yaffs_LostNFound(yaffs_Device *dev)
883 return dev->lostNFoundDir;
888 * Erased NAND checking functions
891 int yaffs_CheckFF(__u8 *buffer, int nBytes)
893 /* Horrible, slow implementation */
902 static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,
905 int retval = YAFFS_OK;
906 __u8 *data = yaffs_GetTempBuffer(dev, __LINE__);
907 yaffs_ExtendedTags tags;
910 result = yaffs_ReadChunkWithTagsFromNAND(dev, chunkInNAND, data, &tags);
912 if (tags.eccResult > YAFFS_ECC_RESULT_NO_ERROR)
915 if (!yaffs_CheckFF(data, dev->nDataBytesPerChunk) || tags.chunkUsed) {
916 T(YAFFS_TRACE_NANDACCESS,
917 (TSTR("Chunk %d not erased" TENDSTR), chunkInNAND));
921 yaffs_ReleaseTempBuffer(dev, data, __LINE__);
928 static int yaffs_VerifyChunkWritten(yaffs_Device *dev,
931 yaffs_ExtendedTags *tags)
933 int retval = YAFFS_OK;
934 yaffs_ExtendedTags tempTags;
935 __u8 *buffer = yaffs_GetTempBuffer(dev,__LINE__);
938 result = yaffs_ReadChunkWithTagsFromNAND(dev,chunkInNAND,buffer,&tempTags);
939 if(memcmp(buffer,data,dev->nDataBytesPerChunk) ||
940 tempTags.objectId != tags->objectId ||
941 tempTags.chunkId != tags->chunkId ||
942 tempTags.byteCount != tags->byteCount)
945 yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
950 static int yaffs_WriteNewChunkWithTagsToNAND(struct yaffs_DeviceStruct *dev,
952 yaffs_ExtendedTags *tags,
959 yaffs_InvalidateCheckpoint(dev);
962 yaffs_BlockInfo *bi = 0;
965 chunk = yaffs_AllocateChunk(dev, useReserve, &bi);
971 /* First check this chunk is erased, if it needs
972 * checking. The checking policy (unless forced
973 * always on) is as follows:
975 * Check the first page we try to write in a block.
976 * If the check passes then we don't need to check any
977 * more. If the check fails, we check again...
978 * If the block has been erased, we don't need to check.
980 * However, if the block has been prioritised for gc,
981 * then we think there might be something odd about
982 * this block and stop using it.
984 * Rationale: We should only ever see chunks that have
985 * not been erased if there was a partially written
986 * chunk due to power loss. This checking policy should
987 * catch that case with very few checks and thus save a
988 * lot of checks that are most likely not needed.
991 * If an erase check fails or the write fails we skip the
995 /* let's give it a try */
998 #ifdef CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED
999 bi->skipErasedCheck = 0;
1001 if (!bi->skipErasedCheck) {
1002 erasedOk = yaffs_CheckChunkErased(dev, chunk);
1003 if (erasedOk != YAFFS_OK) {
1004 T(YAFFS_TRACE_ERROR,
1005 (TSTR("**>> yaffs chunk %d was not erased"
1008 /* If not erased, delete this one,
1009 * skip rest of block and
1010 * try another chunk */
1011 yaffs_DeleteChunk(dev,chunk,1,__LINE__);
1012 yaffs_SkipRestOfBlock(dev);
1017 writeOk = yaffs_WriteChunkWithTagsToNAND(dev, chunk,
1020 if(!bi->skipErasedCheck)
1021 writeOk = yaffs_VerifyChunkWritten(dev, chunk, data, tags);
1023 if (writeOk != YAFFS_OK) {
1024 /* Clean up aborted write, skip to next block and
1025 * try another chunk */
1026 yaffs_HandleWriteChunkError(dev, chunk, erasedOk);
1030 bi->skipErasedCheck = 1;
1032 /* Copy the data into the robustification buffer */
1033 yaffs_HandleWriteChunkOk(dev, chunk, data, tags);
1035 } while (writeOk != YAFFS_OK &&
1036 (yaffs_wr_attempts <= 0 || attempts <= yaffs_wr_attempts));
1042 T(YAFFS_TRACE_ERROR,
1043 (TSTR("**>> yaffs write required %d attempts" TENDSTR),
1046 dev->nRetriedWrites += (attempts - 1);
1053 * Block retiring for handling a broken block.
1056 static void yaffs_RetireBlock(yaffs_Device *dev, int blockInNAND)
1058 yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND);
1060 yaffs_InvalidateCheckpoint(dev);
1062 if (yaffs_MarkBlockBad(dev, blockInNAND) != YAFFS_OK) {
1063 if (yaffs_EraseBlockInNAND(dev, blockInNAND) != YAFFS_OK) {
1064 T(YAFFS_TRACE_ALWAYS, (TSTR(
1065 "yaffs: Failed to mark bad and erase block %d"
1066 TENDSTR), blockInNAND));
1068 yaffs_ExtendedTags tags;
1069 int chunkId = blockInNAND * dev->nChunksPerBlock;
1071 __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__);
1073 memset(buffer, 0xff, dev->nDataBytesPerChunk);
1074 yaffs_InitialiseTags(&tags);
1075 tags.sequenceNumber = YAFFS_SEQUENCE_BAD_BLOCK;
1076 if (dev->writeChunkWithTagsToNAND(dev, chunkId -
1077 dev->chunkOffset, buffer, &tags) != YAFFS_OK)
1078 T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Failed to "
1079 TCONT("write bad block marker to block %d")
1080 TENDSTR), blockInNAND));
1082 yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
1086 bi->blockState = YAFFS_BLOCK_STATE_DEAD;
1087 bi->gcPrioritise = 0;
1088 bi->needsRetiring = 0;
1090 dev->nRetiredBlocks++;
1094 * Functions for robustisizing TODO
1098 static void yaffs_HandleWriteChunkOk(yaffs_Device *dev, int chunkInNAND,
1100 const yaffs_ExtendedTags *tags)
1104 static void yaffs_HandleUpdateChunk(yaffs_Device *dev, int chunkInNAND,
1105 const yaffs_ExtendedTags *tags)
1109 void yaffs_HandleChunkError(yaffs_Device *dev, yaffs_BlockInfo *bi)
1111 if (!bi->gcPrioritise) {
1112 bi->gcPrioritise = 1;
1113 dev->hasPendingPrioritisedGCs = 1;
1114 bi->chunkErrorStrikes++;
1116 if (bi->chunkErrorStrikes > 3) {
1117 bi->needsRetiring = 1; /* Too many stikes, so retire this */
1118 T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Block struck out" TENDSTR)));
1124 static void yaffs_HandleWriteChunkError(yaffs_Device *dev, int chunkInNAND,
1127 int blockInNAND = chunkInNAND / dev->nChunksPerBlock;
1128 yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND);
1130 yaffs_HandleChunkError(dev, bi);
1133 /* Was an actual write failure, so mark the block for retirement */
1134 bi->needsRetiring = 1;
1135 T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
1136 (TSTR("**>> Block %d needs retiring" TENDSTR), blockInNAND));
1139 /* Delete the chunk */
1140 yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__);
1141 yaffs_SkipRestOfBlock(dev);
1145 /*---------------- Name handling functions ------------*/
1147 static __u16 yaffs_CalcNameSum(const YCHAR *name)
1152 const YUCHAR *bname = (const YUCHAR *) name;
1154 while ((*bname) && (i < (YAFFS_MAX_NAME_LENGTH/2))) {
1156 #ifdef CONFIG_YAFFS_CASE_INSENSITIVE
1157 sum += yaffs_toupper(*bname) * i;
1159 sum += (*bname) * i;
1168 static void yaffs_SetObjectName(yaffs_Object *obj, const YCHAR *name)
1170 #ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM
1171 memset(obj->shortName, 0, sizeof(YCHAR) * (YAFFS_SHORT_NAME_LENGTH+1));
1172 if (name && yaffs_strnlen(name,YAFFS_SHORT_NAME_LENGTH+1) <= YAFFS_SHORT_NAME_LENGTH)
1173 yaffs_strcpy(obj->shortName, name);
1175 obj->shortName[0] = _Y('\0');
1177 obj->sum = yaffs_CalcNameSum(name);
1180 /*-------------------- TNODES -------------------
1182 * List of spare tnodes
1183 * The list is hooked together using the first pointer
1187 /* yaffs_CreateTnodes creates a bunch more tnodes and
1188 * adds them to the tnode free list.
1189 * Don't use this function directly
1192 static int yaffs_CreateTnodes(yaffs_Device *dev, int nTnodes)
1196 yaffs_Tnode *newTnodes;
1200 yaffs_TnodeList *tnl;
1205 /* Calculate the tnode size in bytes for variable width tnode support.
1206 * Must be a multiple of 32-bits */
1207 tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
1209 if (tnodeSize < sizeof(yaffs_Tnode))
1210 tnodeSize = sizeof(yaffs_Tnode);
1212 /* make these things */
1214 newTnodes = YMALLOC(nTnodes * tnodeSize);
1215 mem = (__u8 *)newTnodes;
1218 T(YAFFS_TRACE_ERROR,
1219 (TSTR("yaffs: Could not allocate Tnodes" TENDSTR)));
1223 /* Hook them into the free list */
1225 for (i = 0; i < nTnodes - 1; i++) {
1226 newTnodes[i].internal[0] = &newTnodes[i + 1];
1227 #ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
1228 newTnodes[i].internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
1232 newTnodes[nTnodes - 1].internal[0] = dev->freeTnodes;
1233 #ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
1234 newTnodes[nTnodes - 1].internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
1236 dev->freeTnodes = newTnodes;
1238 /* New hookup for wide tnodes */
1239 for (i = 0; i < nTnodes - 1; i++) {
1240 curr = (yaffs_Tnode *) &mem[i * tnodeSize];
1241 next = (yaffs_Tnode *) &mem[(i+1) * tnodeSize];
1242 curr->internal[0] = next;
1245 curr = (yaffs_Tnode *) &mem[(nTnodes - 1) * tnodeSize];
1246 curr->internal[0] = dev->freeTnodes;
1247 dev->freeTnodes = (yaffs_Tnode *)mem;
1252 dev->nFreeTnodes += nTnodes;
1253 dev->nTnodesCreated += nTnodes;
1255 /* Now add this bunch of tnodes to a list for freeing up.
1256 * NB If we can't add this to the management list it isn't fatal
1257 * but it just means we can't free this bunch of tnodes later.
1260 tnl = YMALLOC(sizeof(yaffs_TnodeList));
1262 T(YAFFS_TRACE_ERROR,
1264 ("yaffs: Could not add tnodes to management list" TENDSTR)));
1267 tnl->tnodes = newTnodes;
1268 tnl->next = dev->allocatedTnodeList;
1269 dev->allocatedTnodeList = tnl;
1272 T(YAFFS_TRACE_ALLOCATE, (TSTR("yaffs: Tnodes added" TENDSTR)));
1277 /* GetTnode gets us a clean tnode. Tries to make allocate more if we run out */
1279 static yaffs_Tnode *yaffs_GetTnodeRaw(yaffs_Device *dev)
1281 yaffs_Tnode *tn = NULL;
1283 /* If there are none left make more */
1284 if (!dev->freeTnodes)
1285 yaffs_CreateTnodes(dev, YAFFS_ALLOCATION_NTNODES);
1287 if (dev->freeTnodes) {
1288 tn = dev->freeTnodes;
1289 #ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
1290 if (tn->internal[YAFFS_NTNODES_INTERNAL] != (void *)1) {
1291 /* Hoosterman, this thing looks like it isn't in the list */
1292 T(YAFFS_TRACE_ALWAYS,
1293 (TSTR("yaffs: Tnode list bug 1" TENDSTR)));
1296 dev->freeTnodes = dev->freeTnodes->internal[0];
1300 dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
1305 static yaffs_Tnode *yaffs_GetTnode(yaffs_Device *dev)
1307 yaffs_Tnode *tn = yaffs_GetTnodeRaw(dev);
1308 int tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
1310 if (tnodeSize < sizeof(yaffs_Tnode))
1311 tnodeSize = sizeof(yaffs_Tnode);
1314 memset(tn, 0, tnodeSize);
1319 /* FreeTnode frees up a tnode and puts it back on the free list */
1320 static void yaffs_FreeTnode(yaffs_Device *dev, yaffs_Tnode *tn)
1323 #ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
1324 if (tn->internal[YAFFS_NTNODES_INTERNAL] != 0) {
1325 /* Hoosterman, this thing looks like it is already in the list */
1326 T(YAFFS_TRACE_ALWAYS,
1327 (TSTR("yaffs: Tnode list bug 2" TENDSTR)));
1329 tn->internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
1331 tn->internal[0] = dev->freeTnodes;
1332 dev->freeTnodes = tn;
1335 dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
1338 static void yaffs_DeinitialiseTnodes(yaffs_Device *dev)
1340 /* Free the list of allocated tnodes */
1341 yaffs_TnodeList *tmp;
1343 while (dev->allocatedTnodeList) {
1344 tmp = dev->allocatedTnodeList->next;
1346 YFREE(dev->allocatedTnodeList->tnodes);
1347 YFREE(dev->allocatedTnodeList);
1348 dev->allocatedTnodeList = tmp;
1352 dev->freeTnodes = NULL;
1353 dev->nFreeTnodes = 0;
1356 static void yaffs_InitialiseTnodes(yaffs_Device *dev)
1358 dev->allocatedTnodeList = NULL;
1359 dev->freeTnodes = NULL;
1360 dev->nFreeTnodes = 0;
1361 dev->nTnodesCreated = 0;
1365 void yaffs_LoadLevel0Tnode(yaffs_Device *dev, yaffs_Tnode *tn, unsigned pos,
1368 __u32 *map = (__u32 *)tn;
1374 pos &= YAFFS_TNODES_LEVEL0_MASK;
1375 val >>= dev->chunkGroupBits;
1377 bitInMap = pos * dev->tnodeWidth;
1378 wordInMap = bitInMap / 32;
1379 bitInWord = bitInMap & (32 - 1);
1381 mask = dev->tnodeMask << bitInWord;
1383 map[wordInMap] &= ~mask;
1384 map[wordInMap] |= (mask & (val << bitInWord));
1386 if (dev->tnodeWidth > (32 - bitInWord)) {
1387 bitInWord = (32 - bitInWord);
1389 mask = dev->tnodeMask >> (/*dev->tnodeWidth -*/ bitInWord);
1390 map[wordInMap] &= ~mask;
1391 map[wordInMap] |= (mask & (val >> bitInWord));
1395 static __u32 yaffs_GetChunkGroupBase(yaffs_Device *dev, yaffs_Tnode *tn,
1398 __u32 *map = (__u32 *)tn;
1404 pos &= YAFFS_TNODES_LEVEL0_MASK;
1406 bitInMap = pos * dev->tnodeWidth;
1407 wordInMap = bitInMap / 32;
1408 bitInWord = bitInMap & (32 - 1);
1410 val = map[wordInMap] >> bitInWord;
1412 if (dev->tnodeWidth > (32 - bitInWord)) {
1413 bitInWord = (32 - bitInWord);
1415 val |= (map[wordInMap] << bitInWord);
1418 val &= dev->tnodeMask;
1419 val <<= dev->chunkGroupBits;
1424 /* ------------------- End of individual tnode manipulation -----------------*/
1426 /* ---------Functions to manipulate the look-up tree (made up of tnodes) ------
1427 * The look up tree is represented by the top tnode and the number of topLevel
1428 * in the tree. 0 means only the level 0 tnode is in the tree.
1431 /* FindLevel0Tnode finds the level 0 tnode, if one exists. */
1432 static yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device *dev,
1433 yaffs_FileStructure *fStruct,
1436 yaffs_Tnode *tn = fStruct->top;
1438 int requiredTallness;
1439 int level = fStruct->topLevel;
1441 /* Check sane level and chunk Id */
1442 if (level < 0 || level > YAFFS_TNODES_MAX_LEVEL)
1445 if (chunkId > YAFFS_MAX_CHUNK_ID)
1448 /* First check we're tall enough (ie enough topLevel) */
1450 i = chunkId >> YAFFS_TNODES_LEVEL0_BITS;
1451 requiredTallness = 0;
1453 i >>= YAFFS_TNODES_INTERNAL_BITS;
1457 if (requiredTallness > fStruct->topLevel)
1458 return NULL; /* Not tall enough, so we can't find it */
1460 /* Traverse down to level 0 */
1461 while (level > 0 && tn) {
1462 tn = tn->internal[(chunkId >>
1463 (YAFFS_TNODES_LEVEL0_BITS +
1465 YAFFS_TNODES_INTERNAL_BITS)) &
1466 YAFFS_TNODES_INTERNAL_MASK];
1473 /* AddOrFindLevel0Tnode finds the level 0 tnode if it exists, otherwise first expands the tree.
1474 * This happens in two steps:
1475 * 1. If the tree isn't tall enough, then make it taller.
1476 * 2. Scan down the tree towards the level 0 tnode adding tnodes if required.
1478 * Used when modifying the tree.
1480 * If the tn argument is NULL, then a fresh tnode will be added otherwise the specified tn will
1481 * be plugged into the ttree.
1484 static yaffs_Tnode *yaffs_AddOrFindLevel0Tnode(yaffs_Device *dev,
1485 yaffs_FileStructure *fStruct,
1487 yaffs_Tnode *passedTn)
1489 int requiredTallness;
1497 /* Check sane level and page Id */
1498 if (fStruct->topLevel < 0 || fStruct->topLevel > YAFFS_TNODES_MAX_LEVEL)
1501 if (chunkId > YAFFS_MAX_CHUNK_ID)
1504 /* First check we're tall enough (ie enough topLevel) */
1506 x = chunkId >> YAFFS_TNODES_LEVEL0_BITS;
1507 requiredTallness = 0;
1509 x >>= YAFFS_TNODES_INTERNAL_BITS;
1514 if (requiredTallness > fStruct->topLevel) {
1515 /* Not tall enough, gotta make the tree taller */
1516 for (i = fStruct->topLevel; i < requiredTallness; i++) {
1518 tn = yaffs_GetTnode(dev);
1521 tn->internal[0] = fStruct->top;
1523 fStruct->topLevel++;
1525 T(YAFFS_TRACE_ERROR,
1526 (TSTR("yaffs: no more tnodes" TENDSTR)));
1532 /* Traverse down to level 0, adding anything we need */
1534 l = fStruct->topLevel;
1538 while (l > 0 && tn) {
1540 (YAFFS_TNODES_LEVEL0_BITS +
1541 (l - 1) * YAFFS_TNODES_INTERNAL_BITS)) &
1542 YAFFS_TNODES_INTERNAL_MASK;
1545 if ((l > 1) && !tn->internal[x]) {
1546 /* Add missing non-level-zero tnode */
1547 tn->internal[x] = yaffs_GetTnode(dev);
1548 if(!tn->internal[x])
1551 } else if (l == 1) {
1552 /* Looking from level 1 at level 0 */
1554 /* If we already have one, then release it.*/
1555 if (tn->internal[x])
1556 yaffs_FreeTnode(dev, tn->internal[x]);
1557 tn->internal[x] = passedTn;
1559 } else if (!tn->internal[x]) {
1560 /* Don't have one, none passed in */
1561 tn->internal[x] = yaffs_GetTnode(dev);
1562 if(!tn->internal[x])
1567 tn = tn->internal[x];
1571 /* top is level 0 */
1573 memcpy(tn, passedTn, (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8);
1574 yaffs_FreeTnode(dev, passedTn);
1581 static int yaffs_FindChunkInGroup(yaffs_Device *dev, int theChunk,
1582 yaffs_ExtendedTags *tags, int objectId,
1587 for (j = 0; theChunk && j < dev->chunkGroupSize; j++) {
1588 if (yaffs_CheckChunkBit(dev, theChunk / dev->nChunksPerBlock,
1589 theChunk % dev->nChunksPerBlock)) {
1591 if(dev->chunkGroupSize == 1)
1594 yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL,
1596 if (yaffs_TagsMatch(tags, objectId, chunkInInode)) {
1608 /* DeleteWorker scans backwards through the tnode tree and deletes all the
1609 * chunks and tnodes in the file
1610 * Returns 1 if the tree was deleted.
1611 * Returns 0 if it stopped early due to hitting the limit and the delete is incomplete.
1614 static int yaffs_DeleteWorker(yaffs_Object *in, yaffs_Tnode *tn, __u32 level,
1615 int chunkOffset, int *limit)
1620 yaffs_ExtendedTags tags;
1622 yaffs_Device *dev = in->myDev;
1628 for (i = YAFFS_NTNODES_INTERNAL - 1; allDone && i >= 0;
1630 if (tn->internal[i]) {
1631 if (limit && (*limit) < 0) {
1635 yaffs_DeleteWorker(in,
1643 YAFFS_TNODES_INTERNAL_BITS)
1648 yaffs_FreeTnode(dev,
1651 tn->internal[i] = NULL;
1655 return (allDone) ? 1 : 0;
1656 } else if (level == 0) {
1659 for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0 && !hitLimit;
1661 theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
1664 chunkInInode = (chunkOffset <<
1665 YAFFS_TNODES_LEVEL0_BITS) + i;
1668 yaffs_FindChunkInGroup(dev,
1674 if (foundChunk > 0) {
1675 yaffs_DeleteChunk(dev,
1680 *limit = *limit - 1;
1687 yaffs_LoadLevel0Tnode(dev, tn, i, 0);
1691 return (i < 0) ? 1 : 0;
1701 static void yaffs_SoftDeleteChunk(yaffs_Device *dev, int chunk)
1703 yaffs_BlockInfo *theBlock;
1705 T(YAFFS_TRACE_DELETION, (TSTR("soft delete chunk %d" TENDSTR), chunk));
1707 theBlock = yaffs_GetBlockInfo(dev, chunk / dev->nChunksPerBlock);
1709 theBlock->softDeletions++;
1714 /* SoftDeleteWorker scans backwards through the tnode tree and soft deletes all the chunks in the file.
1715 * All soft deleting does is increment the block's softdelete count and pulls the chunk out
1717 * Thus, essentially this is the same as DeleteWorker except that the chunks are soft deleted.
1720 static int yaffs_SoftDeleteWorker(yaffs_Object *in, yaffs_Tnode *tn,
1721 __u32 level, int chunkOffset)
1726 yaffs_Device *dev = in->myDev;
1731 for (i = YAFFS_NTNODES_INTERNAL - 1; allDone && i >= 0;
1733 if (tn->internal[i]) {
1735 yaffs_SoftDeleteWorker(in,
1741 YAFFS_TNODES_INTERNAL_BITS)
1744 yaffs_FreeTnode(dev,
1747 tn->internal[i] = NULL;
1749 /* Hoosterman... how could this happen? */
1753 return (allDone) ? 1 : 0;
1754 } else if (level == 0) {
1756 for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0; i--) {
1757 theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
1759 /* Note this does not find the real chunk, only the chunk group.
1760 * We make an assumption that a chunk group is not larger than
1763 yaffs_SoftDeleteChunk(dev, theChunk);
1764 yaffs_LoadLevel0Tnode(dev, tn, i, 0);
1778 static void yaffs_SoftDeleteFile(yaffs_Object *obj)
1781 obj->variantType == YAFFS_OBJECT_TYPE_FILE && !obj->softDeleted) {
1782 if (obj->nDataChunks <= 0) {
1783 /* Empty file with no duplicate object headers, just delete it immediately */
1784 yaffs_FreeTnode(obj->myDev,
1785 obj->variant.fileVariant.top);
1786 obj->variant.fileVariant.top = NULL;
1787 T(YAFFS_TRACE_TRACING,
1788 (TSTR("yaffs: Deleting empty file %d" TENDSTR),
1790 yaffs_DoGenericObjectDeletion(obj);
1792 yaffs_SoftDeleteWorker(obj,
1793 obj->variant.fileVariant.top,
1794 obj->variant.fileVariant.
1796 obj->softDeleted = 1;
1801 /* Pruning removes any part of the file structure tree that is beyond the
1802 * bounds of the file (ie that does not point to chunks).
1804 * A file should only get pruned when its size is reduced.
1806 * Before pruning, the chunks must be pulled from the tree and the
1807 * level 0 tnode entries must be zeroed out.
1808 * Could also use this for file deletion, but that's probably better handled
1809 * by a special case.
1812 static yaffs_Tnode *yaffs_PruneWorker(yaffs_Device *dev, yaffs_Tnode *tn,
1813 __u32 level, int del0)
1821 for (i = 0; i < YAFFS_NTNODES_INTERNAL; i++) {
1822 if (tn->internal[i] && level > 0) {
1824 yaffs_PruneWorker(dev, tn->internal[i],
1826 (i == 0) ? del0 : 1);
1829 if (tn->internal[i])
1833 if (hasData == 0 && del0) {
1834 /* Free and return NULL */
1836 yaffs_FreeTnode(dev, tn);
1846 static int yaffs_PruneFileStructure(yaffs_Device *dev,
1847 yaffs_FileStructure *fStruct)
1854 if (fStruct->topLevel > 0) {
1856 yaffs_PruneWorker(dev, fStruct->top, fStruct->topLevel, 0);
1858 /* Now we have a tree with all the non-zero branches NULL but the height
1859 * is the same as it was.
1860 * Let's see if we can trim internal tnodes to shorten the tree.
1861 * We can do this if only the 0th element in the tnode is in use
1862 * (ie all the non-zero are NULL)
1865 while (fStruct->topLevel && !done) {
1869 for (i = 1; i < YAFFS_NTNODES_INTERNAL; i++) {
1870 if (tn->internal[i])
1875 fStruct->top = tn->internal[0];
1876 fStruct->topLevel--;
1877 yaffs_FreeTnode(dev, tn);
1887 /*-------------------- End of File Structure functions.-------------------*/
1889 /* yaffs_CreateFreeObjects creates a bunch more objects and
1890 * adds them to the object free list.
1892 static int yaffs_CreateFreeObjects(yaffs_Device *dev, int nObjects)
1895 yaffs_Object *newObjects;
1896 yaffs_ObjectList *list;
1901 /* make these things */
1902 newObjects = YMALLOC(nObjects * sizeof(yaffs_Object));
1903 list = YMALLOC(sizeof(yaffs_ObjectList));
1905 if (!newObjects || !list) {
1914 T(YAFFS_TRACE_ALLOCATE,
1915 (TSTR("yaffs: Could not allocate more objects" TENDSTR)));
1919 /* Hook them into the free list */
1920 for (i = 0; i < nObjects - 1; i++) {
1921 newObjects[i].siblings.next =
1922 (struct ylist_head *)(&newObjects[i + 1]);
1925 newObjects[nObjects - 1].siblings.next = (void *)dev->freeObjects;
1926 dev->freeObjects = newObjects;
1927 dev->nFreeObjects += nObjects;
1928 dev->nObjectsCreated += nObjects;
1930 /* Now add this bunch of Objects to a list for freeing up. */
1932 list->objects = newObjects;
1933 list->next = dev->allocatedObjectList;
1934 dev->allocatedObjectList = list;
1940 /* AllocateEmptyObject gets us a clean Object. Tries to make allocate more if we run out */
1941 static yaffs_Object *yaffs_AllocateEmptyObject(yaffs_Device *dev)
1943 yaffs_Object *tn = NULL;
1945 #ifdef VALGRIND_TEST
1946 tn = YMALLOC(sizeof(yaffs_Object));
1948 /* If there are none left make more */
1949 if (!dev->freeObjects)
1950 yaffs_CreateFreeObjects(dev, YAFFS_ALLOCATION_NOBJECTS);
1952 if (dev->freeObjects) {
1953 tn = dev->freeObjects;
1955 (yaffs_Object *) (dev->freeObjects->siblings.next);
1956 dev->nFreeObjects--;
1960 /* Now sweeten it up... */
1962 memset(tn, 0, sizeof(yaffs_Object));
1963 tn->beingCreated = 1;
1967 tn->variantType = YAFFS_OBJECT_TYPE_UNKNOWN;
1968 YINIT_LIST_HEAD(&(tn->hardLinks));
1969 YINIT_LIST_HEAD(&(tn->hashLink));
1970 YINIT_LIST_HEAD(&tn->siblings);
1973 /* Now make the directory sane */
1975 tn->parent = dev->rootDir;
1976 ylist_add(&(tn->siblings), &dev->rootDir->variant.directoryVariant.children);
1979 /* Add it to the lost and found directory.
1980 * NB Can't put root or lostNFound in lostNFound so
1981 * check if lostNFound exists first
1983 if (dev->lostNFoundDir)
1984 yaffs_AddObjectToDirectory(dev->lostNFoundDir, tn);
1986 tn->beingCreated = 0;
1989 dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
1994 static yaffs_Object *yaffs_CreateFakeDirectory(yaffs_Device *dev, int number,
1999 yaffs_CreateNewObject(dev, number, YAFFS_OBJECT_TYPE_DIRECTORY);
2001 obj->fake = 1; /* it is fake so it might have no NAND presence... */
2002 obj->renameAllowed = 0; /* ... and we're not allowed to rename it... */
2003 obj->unlinkAllowed = 0; /* ... or unlink it */
2006 obj->yst_mode = mode;
2008 obj->hdrChunk = 0; /* Not a valid chunk. */
2015 static void yaffs_UnhashObject(yaffs_Object *tn)
2018 yaffs_Device *dev = tn->myDev;
2020 /* If it is still linked into the bucket list, free from the list */
2021 if (!ylist_empty(&tn->hashLink)) {
2022 ylist_del_init(&tn->hashLink);
2023 bucket = yaffs_HashFunction(tn->objectId);
2024 dev->objectBucket[bucket].count--;
2028 /* FreeObject frees up a Object and puts it back on the free list */
2029 static void yaffs_FreeObject(yaffs_Object *tn)
2031 yaffs_Device *dev = tn->myDev;
2034 T(YAFFS_TRACE_OS, (TSTR("FreeObject %p inode %p"TENDSTR), tn, tn->myInode));
2039 if (!ylist_empty(&tn->siblings))
2045 /* We're still hooked up to a cached inode.
2046 * Don't delete now, but mark for later deletion
2048 tn->deferedFree = 1;
2053 yaffs_UnhashObject(tn);
2055 #ifdef VALGRIND_TEST
2059 /* Link into the free list. */
2060 tn->siblings.next = (struct ylist_head *)(dev->freeObjects);
2061 dev->freeObjects = tn;
2062 dev->nFreeObjects++;
2064 dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
2069 void yaffs_HandleDeferedFree(yaffs_Object *obj)
2071 if (obj->deferedFree)
2072 yaffs_FreeObject(obj);
2077 static void yaffs_DeinitialiseObjects(yaffs_Device *dev)
2079 /* Free the list of allocated Objects */
2081 yaffs_ObjectList *tmp;
2083 while (dev->allocatedObjectList) {
2084 tmp = dev->allocatedObjectList->next;
2085 YFREE(dev->allocatedObjectList->objects);
2086 YFREE(dev->allocatedObjectList);
2088 dev->allocatedObjectList = tmp;
2091 dev->freeObjects = NULL;
2092 dev->nFreeObjects = 0;
2095 static void yaffs_InitialiseObjects(yaffs_Device *dev)
2099 dev->allocatedObjectList = NULL;
2100 dev->freeObjects = NULL;
2101 dev->nFreeObjects = 0;
2103 for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
2104 YINIT_LIST_HEAD(&dev->objectBucket[i].list);
2105 dev->objectBucket[i].count = 0;
2109 static int yaffs_FindNiceObjectBucket(yaffs_Device *dev)
2114 int lowest = 999999;
2116 /* First let's see if we can find one that's empty. */
2118 for (i = 0; i < 10 && lowest > 0; i++) {
2120 x %= YAFFS_NOBJECT_BUCKETS;
2121 if (dev->objectBucket[x].count < lowest) {
2122 lowest = dev->objectBucket[x].count;
2128 /* If we didn't find an empty list, then try
2129 * looking a bit further for a short one
2132 for (i = 0; i < 10 && lowest > 3; i++) {
2134 x %= YAFFS_NOBJECT_BUCKETS;
2135 if (dev->objectBucket[x].count < lowest) {
2136 lowest = dev->objectBucket[x].count;
2145 static int yaffs_CreateNewObjectNumber(yaffs_Device *dev)
2147 int bucket = yaffs_FindNiceObjectBucket(dev);
2149 /* Now find an object value that has not already been taken
2150 * by scanning the list.
2154 struct ylist_head *i;
2156 __u32 n = (__u32) bucket;
2158 /* yaffs_CheckObjectHashSanity(); */
2162 n += YAFFS_NOBJECT_BUCKETS;
2163 if (1 || dev->objectBucket[bucket].count > 0) {
2164 ylist_for_each(i, &dev->objectBucket[bucket].list) {
2165 /* If there is already one in the list */
2166 if (i && ylist_entry(i, yaffs_Object,
2167 hashLink)->objectId == n) {
2177 static void yaffs_HashObject(yaffs_Object *in)
2179 int bucket = yaffs_HashFunction(in->objectId);
2180 yaffs_Device *dev = in->myDev;
2182 ylist_add(&in->hashLink, &dev->objectBucket[bucket].list);
2183 dev->objectBucket[bucket].count++;
2186 yaffs_Object *yaffs_FindObjectByNumber(yaffs_Device *dev, __u32 number)
2188 int bucket = yaffs_HashFunction(number);
2189 struct ylist_head *i;
2192 ylist_for_each(i, &dev->objectBucket[bucket].list) {
2193 /* Look if it is in the list */
2195 in = ylist_entry(i, yaffs_Object, hashLink);
2196 if (in->objectId == number) {
2198 /* Don't tell the VFS about this one if it is defered free */
2199 if (in->deferedFree)
2211 yaffs_Object *yaffs_CreateNewObject(yaffs_Device *dev, int number,
2212 yaffs_ObjectType type)
2214 yaffs_Object *theObject;
2215 yaffs_Tnode *tn = NULL;
2218 number = yaffs_CreateNewObjectNumber(dev);
2220 if (type == YAFFS_OBJECT_TYPE_FILE) {
2221 tn = yaffs_GetTnode(dev);
2226 theObject = yaffs_AllocateEmptyObject(dev);
2229 yaffs_FreeTnode(dev,tn);
2235 theObject->fake = 0;
2236 theObject->renameAllowed = 1;
2237 theObject->unlinkAllowed = 1;
2238 theObject->objectId = number;
2239 yaffs_HashObject(theObject);
2240 theObject->variantType = type;
2241 #ifdef CONFIG_YAFFS_WINCE
2242 yfsd_WinFileTimeNow(theObject->win_atime);
2243 theObject->win_ctime[0] = theObject->win_mtime[0] =
2244 theObject->win_atime[0];
2245 theObject->win_ctime[1] = theObject->win_mtime[1] =
2246 theObject->win_atime[1];
2250 theObject->yst_atime = theObject->yst_mtime =
2251 theObject->yst_ctime = Y_CURRENT_TIME;
2254 case YAFFS_OBJECT_TYPE_FILE:
2255 theObject->variant.fileVariant.fileSize = 0;
2256 theObject->variant.fileVariant.scannedFileSize = 0;
2257 theObject->variant.fileVariant.shrinkSize = 0xFFFFFFFF; /* max __u32 */
2258 theObject->variant.fileVariant.topLevel = 0;
2259 theObject->variant.fileVariant.top = tn;
2261 case YAFFS_OBJECT_TYPE_DIRECTORY:
2262 YINIT_LIST_HEAD(&theObject->variant.directoryVariant.
2265 case YAFFS_OBJECT_TYPE_SYMLINK:
2266 case YAFFS_OBJECT_TYPE_HARDLINK:
2267 case YAFFS_OBJECT_TYPE_SPECIAL:
2268 /* No action required */
2270 case YAFFS_OBJECT_TYPE_UNKNOWN:
2271 /* todo this should not happen */
2279 static yaffs_Object *yaffs_FindOrCreateObjectByNumber(yaffs_Device *dev,
2281 yaffs_ObjectType type)
2283 yaffs_Object *theObject = NULL;
2286 theObject = yaffs_FindObjectByNumber(dev, number);
2289 theObject = yaffs_CreateNewObject(dev, number, type);
2296 static YCHAR *yaffs_CloneString(const YCHAR *str)
2298 YCHAR *newStr = NULL;
2304 len = yaffs_strnlen(str,YAFFS_MAX_ALIAS_LENGTH);
2305 newStr = YMALLOC((len + 1) * sizeof(YCHAR));
2307 yaffs_strncpy(newStr, str,len);
2315 * Mknod (create) a new object.
2316 * equivalentObject only has meaning for a hard link;
2317 * aliasString only has meaning for a symlink.
2318 * rdev only has meaning for devices (a subset of special objects)
2321 static yaffs_Object *yaffs_MknodObject(yaffs_ObjectType type,
2322 yaffs_Object *parent,
2327 yaffs_Object *equivalentObject,
2328 const YCHAR *aliasString, __u32 rdev)
2333 yaffs_Device *dev = parent->myDev;
2335 /* Check if the entry exists. If it does then fail the call since we don't want a dup.*/
2336 if (yaffs_FindObjectByName(parent, name))
2339 if (type == YAFFS_OBJECT_TYPE_SYMLINK) {
2340 str = yaffs_CloneString(aliasString);
2345 in = yaffs_CreateNewObject(dev, -1, type);
2359 in->variantType = type;
2361 in->yst_mode = mode;
2363 #ifdef CONFIG_YAFFS_WINCE
2364 yfsd_WinFileTimeNow(in->win_atime);
2365 in->win_ctime[0] = in->win_mtime[0] = in->win_atime[0];
2366 in->win_ctime[1] = in->win_mtime[1] = in->win_atime[1];
2369 in->yst_atime = in->yst_mtime = in->yst_ctime = Y_CURRENT_TIME;
2371 in->yst_rdev = rdev;
2375 in->nDataChunks = 0;
2377 yaffs_SetObjectName(in, name);
2380 yaffs_AddObjectToDirectory(parent, in);
2382 in->myDev = parent->myDev;
2385 case YAFFS_OBJECT_TYPE_SYMLINK:
2386 in->variant.symLinkVariant.alias = str;
2388 case YAFFS_OBJECT_TYPE_HARDLINK:
2389 in->variant.hardLinkVariant.equivalentObject =
2391 in->variant.hardLinkVariant.equivalentObjectId =
2392 equivalentObject->objectId;
2393 ylist_add(&in->hardLinks, &equivalentObject->hardLinks);
2395 case YAFFS_OBJECT_TYPE_FILE:
2396 case YAFFS_OBJECT_TYPE_DIRECTORY:
2397 case YAFFS_OBJECT_TYPE_SPECIAL:
2398 case YAFFS_OBJECT_TYPE_UNKNOWN:
2403 if (yaffs_UpdateObjectHeader(in, name, 0, 0, 0) < 0) {
2404 /* Could not create the object header, fail the creation */
2405 yaffs_DeleteObject(in);
2409 yaffs_UpdateParent(parent);
2415 yaffs_Object *yaffs_MknodFile(yaffs_Object *parent, const YCHAR *name,
2416 __u32 mode, __u32 uid, __u32 gid)
2418 return yaffs_MknodObject(YAFFS_OBJECT_TYPE_FILE, parent, name, mode,
2419 uid, gid, NULL, NULL, 0);
2422 yaffs_Object *yaffs_MknodDirectory(yaffs_Object *parent, const YCHAR *name,
2423 __u32 mode, __u32 uid, __u32 gid)
2425 return yaffs_MknodObject(YAFFS_OBJECT_TYPE_DIRECTORY, parent, name,
2426 mode, uid, gid, NULL, NULL, 0);
2429 yaffs_Object *yaffs_MknodSpecial(yaffs_Object *parent, const YCHAR *name,
2430 __u32 mode, __u32 uid, __u32 gid, __u32 rdev)
2432 return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SPECIAL, parent, name, mode,
2433 uid, gid, NULL, NULL, rdev);
2436 yaffs_Object *yaffs_MknodSymLink(yaffs_Object *parent, const YCHAR *name,
2437 __u32 mode, __u32 uid, __u32 gid,
2440 return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SYMLINK, parent, name, mode,
2441 uid, gid, NULL, alias, 0);
2444 /* yaffs_Link returns the object id of the equivalent object.*/
2445 yaffs_Object *yaffs_Link(yaffs_Object *parent, const YCHAR *name,
2446 yaffs_Object *equivalentObject)
2448 /* Get the real object in case we were fed a hard link as an equivalent object */
2449 equivalentObject = yaffs_GetEquivalentObject(equivalentObject);
2451 if (yaffs_MknodObject
2452 (YAFFS_OBJECT_TYPE_HARDLINK, parent, name, 0, 0, 0,
2453 equivalentObject, NULL, 0)) {
2454 return equivalentObject;
2461 static int yaffs_ChangeObjectName(yaffs_Object *obj, yaffs_Object *newDir,
2462 const YCHAR *newName, int force, int shadows)
2467 yaffs_Object *existingTarget;
2470 newDir = obj->parent; /* use the old directory */
2472 if (newDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
2473 T(YAFFS_TRACE_ALWAYS,
2475 ("tragedy: yaffs_ChangeObjectName: newDir is not a directory"
2480 /* TODO: Do we need this different handling for YAFFS2 and YAFFS1?? */
2481 if (obj->myDev->isYaffs2)
2482 unlinkOp = (newDir == obj->myDev->unlinkedDir);
2484 unlinkOp = (newDir == obj->myDev->unlinkedDir
2485 && obj->variantType == YAFFS_OBJECT_TYPE_FILE);
2487 deleteOp = (newDir == obj->myDev->deletedDir);
2489 existingTarget = yaffs_FindObjectByName(newDir, newName);
2491 /* If the object is a file going into the unlinked directory,
2492 * then it is OK to just stuff it in since duplicate names are allowed.
2493 * else only proceed if the new name does not exist and if we're putting
2494 * it into a directory.
2501 newDir->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) {
2502 yaffs_SetObjectName(obj, newName);
2505 yaffs_AddObjectToDirectory(newDir, obj);
2510 /* If it is a deletion then we mark it as a shrink for gc purposes. */
2511 if (yaffs_UpdateObjectHeader(obj, newName, 0, deleteOp, shadows) >= 0)
2518 int yaffs_RenameObject(yaffs_Object *oldDir, const YCHAR *oldName,
2519 yaffs_Object *newDir, const YCHAR *newName)
2521 yaffs_Object *obj = NULL;
2522 yaffs_Object *existingTarget = NULL;
2528 if (!oldDir || oldDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
2530 if (!newDir || newDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
2533 dev = oldDir->myDev;
2535 #ifdef CONFIG_YAFFS_CASE_INSENSITIVE
2536 /* Special case for case insemsitive systems (eg. WinCE).
2537 * While look-up is case insensitive, the name isn't.
2538 * Therefore we might want to change x.txt to X.txt
2540 if (oldDir == newDir && yaffs_strcmp(oldName, newName) == 0)
2544 if(yaffs_strnlen(newName,YAFFS_MAX_NAME_LENGTH+1) > YAFFS_MAX_NAME_LENGTH)
2548 obj = yaffs_FindObjectByName(oldDir, oldName);
2550 if (obj && obj->renameAllowed) {
2552 /* Now do the handling for an existing target, if there is one */
2554 existingTarget = yaffs_FindObjectByName(newDir, newName);
2555 if (existingTarget &&
2556 existingTarget->variantType == YAFFS_OBJECT_TYPE_DIRECTORY &&
2557 !ylist_empty(&existingTarget->variant.directoryVariant.children)) {
2558 /* There is a target that is a non-empty directory, so we fail */
2559 return YAFFS_FAIL; /* EEXIST or ENOTEMPTY */
2560 } else if (existingTarget && existingTarget != obj) {
2561 /* Nuke the target first, using shadowing,
2562 * but only if it isn't the same object.
2564 * Note we must disable gc otherwise it can mess up the shadowing.
2568 yaffs_ChangeObjectName(obj, newDir, newName, force,
2569 existingTarget->objectId);
2570 existingTarget->isShadowed = 1;
2571 yaffs_UnlinkObject(existingTarget);
2575 result = yaffs_ChangeObjectName(obj, newDir, newName, 1, 0);
2577 yaffs_UpdateParent(oldDir);
2578 if(newDir != oldDir)
2579 yaffs_UpdateParent(newDir);
2586 /*------------------------- Block Management and Page Allocation ----------------*/
2588 static int yaffs_InitialiseBlocks(yaffs_Device *dev)
2590 int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1;
2592 dev->blockInfo = NULL;
2593 dev->chunkBits = NULL;
2595 dev->allocationBlock = -1; /* force it to get a new one */
2597 /* If the first allocation strategy fails, thry the alternate one */
2598 dev->blockInfo = YMALLOC(nBlocks * sizeof(yaffs_BlockInfo));
2599 if (!dev->blockInfo) {
2600 dev->blockInfo = YMALLOC_ALT(nBlocks * sizeof(yaffs_BlockInfo));
2601 dev->blockInfoAlt = 1;
2603 dev->blockInfoAlt = 0;
2605 if (dev->blockInfo) {
2606 /* Set up dynamic blockinfo stuff. */
2607 dev->chunkBitmapStride = (dev->nChunksPerBlock + 7) / 8; /* round up bytes */
2608 dev->chunkBits = YMALLOC(dev->chunkBitmapStride * nBlocks);
2609 if (!dev->chunkBits) {
2610 dev->chunkBits = YMALLOC_ALT(dev->chunkBitmapStride * nBlocks);
2611 dev->chunkBitsAlt = 1;
2613 dev->chunkBitsAlt = 0;
2616 if (dev->blockInfo && dev->chunkBits) {
2617 memset(dev->blockInfo, 0, nBlocks * sizeof(yaffs_BlockInfo));
2618 memset(dev->chunkBits, 0, dev->chunkBitmapStride * nBlocks);
2625 static void yaffs_DeinitialiseBlocks(yaffs_Device *dev)
2627 if (dev->blockInfoAlt && dev->blockInfo)
2628 YFREE_ALT(dev->blockInfo);
2629 else if (dev->blockInfo)
2630 YFREE(dev->blockInfo);
2632 dev->blockInfoAlt = 0;
2634 dev->blockInfo = NULL;
2636 if (dev->chunkBitsAlt && dev->chunkBits)
2637 YFREE_ALT(dev->chunkBits);
2638 else if (dev->chunkBits)
2639 YFREE(dev->chunkBits);
2640 dev->chunkBitsAlt = 0;
2641 dev->chunkBits = NULL;
2644 static int yaffs_BlockNotDisqualifiedFromGC(yaffs_Device *dev,
2645 yaffs_BlockInfo *bi)
2652 return 1; /* disqualification only applies to yaffs2. */
2654 if (!bi->hasShrinkHeader)
2655 return 1; /* can gc */
2657 /* Find the oldest dirty sequence number if we don't know it and save it
2658 * so we don't have to keep recomputing it.
2660 if (!dev->oldestDirtySequence) {
2661 seq = dev->sequenceNumber;
2663 for (i = dev->internalStartBlock; i <= dev->internalEndBlock;
2665 b = yaffs_GetBlockInfo(dev, i);
2666 if (b->blockState == YAFFS_BLOCK_STATE_FULL &&
2667 (b->pagesInUse - b->softDeletions) <
2668 dev->nChunksPerBlock && b->sequenceNumber < seq) {
2669 seq = b->sequenceNumber;
2672 dev->oldestDirtySequence = seq;
2675 /* Can't do gc of this block if there are any blocks older than this one that have
2678 return (bi->sequenceNumber <= dev->oldestDirtySequence);
2681 /* FindDiretiestBlock is used to select the dirtiest block (or close enough)
2682 * for garbage collection.
2685 static int yaffs_FindBlockForGarbageCollection(yaffs_Device *dev,
2688 int b = dev->currentDirtyChecker;
2694 int prioritised = 0;
2695 yaffs_BlockInfo *bi;
2696 int pendingPrioritisedExist = 0;
2698 /* First let's see if we need to grab a prioritised block */
2699 if (dev->hasPendingPrioritisedGCs) {
2700 for (i = dev->internalStartBlock; i < dev->internalEndBlock && !prioritised; i++) {
2702 bi = yaffs_GetBlockInfo(dev, i);
2703 /* yaffs_VerifyBlock(dev,bi,i); */
2705 if (bi->gcPrioritise) {
2706 pendingPrioritisedExist = 1;
2707 if (bi->blockState == YAFFS_BLOCK_STATE_FULL &&
2708 yaffs_BlockNotDisqualifiedFromGC(dev, bi)) {
2709 pagesInUse = (bi->pagesInUse - bi->softDeletions);
2712 aggressive = 1; /* Fool the non-aggressive skip logiv below */
2717 if (!pendingPrioritisedExist) /* None found, so we can clear this */
2718 dev->hasPendingPrioritisedGCs = 0;
2721 /* If we're doing aggressive GC then we are happy to take a less-dirty block, and
2723 * else (we're doing a leasurely gc), then we only bother to do this if the
2724 * block has only a few pages in use.
2727 dev->nonAggressiveSkip--;
2729 if (!aggressive && (dev->nonAggressiveSkip > 0))
2734 (aggressive) ? dev->nChunksPerBlock : YAFFS_PASSIVE_GC_CHUNKS + 1;
2738 dev->internalEndBlock - dev->internalStartBlock + 1;
2741 dev->internalEndBlock - dev->internalStartBlock + 1;
2742 iterations = iterations / 16;
2743 if (iterations > 200)
2747 for (i = 0; i <= iterations && pagesInUse > 0 && !prioritised; i++) {
2749 if (b < dev->internalStartBlock || b > dev->internalEndBlock)
2750 b = dev->internalStartBlock;
2752 if (b < dev->internalStartBlock || b > dev->internalEndBlock) {
2753 T(YAFFS_TRACE_ERROR,
2754 (TSTR("**>> Block %d is not valid" TENDSTR), b));
2758 bi = yaffs_GetBlockInfo(dev, b);
2760 if (bi->blockState == YAFFS_BLOCK_STATE_FULL &&
2761 (bi->pagesInUse - bi->softDeletions) < pagesInUse &&
2762 yaffs_BlockNotDisqualifiedFromGC(dev, bi)) {
2764 pagesInUse = (bi->pagesInUse - bi->softDeletions);
2768 dev->currentDirtyChecker = b;
2772 (TSTR("GC Selected block %d with %d free, prioritised:%d" TENDSTR), dirtiest,
2773 dev->nChunksPerBlock - pagesInUse, prioritised));
2776 dev->oldestDirtySequence = 0;
2779 dev->nonAggressiveSkip = 4;
2784 static void yaffs_BlockBecameDirty(yaffs_Device *dev, int blockNo)
2786 yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockNo);
2790 /* If the block is still healthy erase it and mark as clean.
2791 * If the block has had a data failure, then retire it.
2794 T(YAFFS_TRACE_GC | YAFFS_TRACE_ERASE,
2795 (TSTR("yaffs_BlockBecameDirty block %d state %d %s"TENDSTR),
2796 blockNo, bi->blockState, (bi->needsRetiring) ? "needs retiring" : ""));
2798 bi->blockState = YAFFS_BLOCK_STATE_DIRTY;
2800 if (!bi->needsRetiring) {
2801 yaffs_InvalidateCheckpoint(dev);
2802 erasedOk = yaffs_EraseBlockInNAND(dev, blockNo);
2804 dev->nErasureFailures++;
2805 T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
2806 (TSTR("**>> Erasure failed %d" TENDSTR), blockNo));
2811 ((yaffs_traceMask & YAFFS_TRACE_ERASE) || !yaffs_SkipVerification(dev))) {
2813 for (i = 0; i < dev->nChunksPerBlock; i++) {
2814 if (!yaffs_CheckChunkErased
2815 (dev, blockNo * dev->nChunksPerBlock + i)) {
2816 T(YAFFS_TRACE_ERROR,
2818 (">>Block %d erasure supposedly OK, but chunk %d not erased"
2819 TENDSTR), blockNo, i));
2825 /* Clean it up... */
2826 bi->blockState = YAFFS_BLOCK_STATE_EMPTY;
2827 dev->nErasedBlocks++;
2829 bi->softDeletions = 0;
2830 bi->hasShrinkHeader = 0;
2831 bi->skipErasedCheck = 1; /* This is clean, so no need to check */
2832 bi->gcPrioritise = 0;
2833 yaffs_ClearChunkBits(dev, blockNo);
2835 T(YAFFS_TRACE_ERASE,
2836 (TSTR("Erased block %d" TENDSTR), blockNo));
2838 dev->nFreeChunks -= dev->nChunksPerBlock; /* We lost a block of free space */
2840 yaffs_RetireBlock(dev, blockNo);
2841 T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
2842 (TSTR("**>> Block %d retired" TENDSTR), blockNo));
2846 static int yaffs_FindBlockForAllocation(yaffs_Device *dev)
2850 yaffs_BlockInfo *bi;
2852 if (dev->nErasedBlocks < 1) {
2853 /* Hoosterman we've got a problem.
2854 * Can't get space to gc
2856 T(YAFFS_TRACE_ERROR,
2857 (TSTR("yaffs tragedy: no more erased blocks" TENDSTR)));
2862 /* Find an empty block. */
2864 for (i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) {
2865 dev->allocationBlockFinder++;
2866 if (dev->allocationBlockFinder < dev->internalStartBlock
2867 || dev->allocationBlockFinder > dev->internalEndBlock) {
2868 dev->allocationBlockFinder = dev->internalStartBlock;
2871 bi = yaffs_GetBlockInfo(dev, dev->allocationBlockFinder);
2873 if (bi->blockState == YAFFS_BLOCK_STATE_EMPTY) {
2874 bi->blockState = YAFFS_BLOCK_STATE_ALLOCATING;
2875 dev->sequenceNumber++;
2876 bi->sequenceNumber = dev->sequenceNumber;
2877 dev->nErasedBlocks--;
2878 T(YAFFS_TRACE_ALLOCATE,
2879 (TSTR("Allocated block %d, seq %d, %d left" TENDSTR),
2880 dev->allocationBlockFinder, dev->sequenceNumber,
2881 dev->nErasedBlocks));
2882 return dev->allocationBlockFinder;
2886 T(YAFFS_TRACE_ALWAYS,
2888 ("yaffs tragedy: no more erased blocks, but there should have been %d"
2889 TENDSTR), dev->nErasedBlocks));
2896 static int yaffs_CalcCheckpointBlocksRequired(yaffs_Device *dev)
2898 if (!dev->nCheckpointBlocksRequired &&
2900 /* Not a valid value so recalculate */
2903 int devBlocks = (dev->endBlock - dev->startBlock + 1);
2906 tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
2908 if (tnodeSize < sizeof(yaffs_Tnode))
2909 tnodeSize = sizeof(yaffs_Tnode);
2911 nBytes += sizeof(yaffs_CheckpointValidity);
2912 nBytes += sizeof(yaffs_CheckpointDevice);
2913 nBytes += devBlocks * sizeof(yaffs_BlockInfo);
2914 nBytes += devBlocks * dev->chunkBitmapStride;
2915 nBytes += (sizeof(yaffs_CheckpointObject) + sizeof(__u32)) * (dev->nObjectsCreated - dev->nFreeObjects);
2916 nBytes += (tnodeSize + sizeof(__u32)) * (dev->nTnodesCreated - dev->nFreeTnodes);
2917 nBytes += sizeof(yaffs_CheckpointValidity);
2918 nBytes += sizeof(__u32); /* checksum*/
2920 /* Round up and add 2 blocks to allow for some bad blocks, so add 3 */
2922 nBlocks = (nBytes/(dev->nDataBytesPerChunk * dev->nChunksPerBlock)) + 3;
2924 dev->nCheckpointBlocksRequired = nBlocks;
2927 return dev->nCheckpointBlocksRequired;
2931 * Check if there's space to allocate...
2932 * Thinks.... do we need top make this ths same as yaffs_GetFreeChunks()?
2934 static int yaffs_CheckSpaceForAllocation(yaffs_Device *dev)
2937 int reservedBlocks = dev->nReservedBlocks;
2938 int checkpointBlocks;
2940 if (dev->isYaffs2) {
2941 checkpointBlocks = yaffs_CalcCheckpointBlocksRequired(dev) -
2942 dev->blocksInCheckpoint;
2943 if (checkpointBlocks < 0)
2944 checkpointBlocks = 0;
2946 checkpointBlocks = 0;
2949 reservedChunks = ((reservedBlocks + checkpointBlocks) * dev->nChunksPerBlock);
2951 return (dev->nFreeChunks > reservedChunks);
2954 static int yaffs_AllocateChunk(yaffs_Device *dev, int useReserve,
2955 yaffs_BlockInfo **blockUsedPtr)
2958 yaffs_BlockInfo *bi;
2960 if (dev->allocationBlock < 0) {
2961 /* Get next block to allocate off */
2962 dev->allocationBlock = yaffs_FindBlockForAllocation(dev);
2963 dev->allocationPage = 0;
2966 if (!useReserve && !yaffs_CheckSpaceForAllocation(dev)) {
2967 /* Not enough space to allocate unless we're allowed to use the reserve. */
2971 if (dev->nErasedBlocks < dev->nReservedBlocks
2972 && dev->allocationPage == 0) {
2973 T(YAFFS_TRACE_ALLOCATE, (TSTR("Allocating reserve" TENDSTR)));
2976 /* Next page please.... */
2977 if (dev->allocationBlock >= 0) {
2978 bi = yaffs_GetBlockInfo(dev, dev->allocationBlock);
2980 retVal = (dev->allocationBlock * dev->nChunksPerBlock) +
2981 dev->allocationPage;
2983 yaffs_SetChunkBit(dev, dev->allocationBlock,
2984 dev->allocationPage);
2986 dev->allocationPage++;
2990 /* If the block is full set the state to full */
2991 if (dev->allocationPage >= dev->nChunksPerBlock) {
2992 bi->blockState = YAFFS_BLOCK_STATE_FULL;
2993 dev->allocationBlock = -1;
3002 T(YAFFS_TRACE_ERROR,
3003 (TSTR("!!!!!!!!! Allocator out !!!!!!!!!!!!!!!!!" TENDSTR)));
3008 static int yaffs_GetErasedChunks(yaffs_Device *dev)
3012 n = dev->nErasedBlocks * dev->nChunksPerBlock;
3014 if (dev->allocationBlock > 0)
3015 n += (dev->nChunksPerBlock - dev->allocationPage);
3022 * yaffs_SkipRestOfBlock() skips over the rest of the allocation block
3023 * if we don't want to write to it.
3025 static void yaffs_SkipRestOfBlock(yaffs_Device *dev)
3027 if(dev->allocationBlock > 0){
3028 yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, dev->allocationBlock);
3029 if(bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING){
3030 bi->blockState = YAFFS_BLOCK_STATE_FULL;
3031 dev->allocationBlock = -1;
3037 static int yaffs_GarbageCollectBlock(yaffs_Device *dev, int block,
3043 int retVal = YAFFS_OK;
3046 int isCheckpointBlock;
3050 int chunksBefore = yaffs_GetErasedChunks(dev);
3053 yaffs_ExtendedTags tags;
3055 yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, block);
3057 yaffs_Object *object;
3059 isCheckpointBlock = (bi->blockState == YAFFS_BLOCK_STATE_CHECKPOINT);
3062 T(YAFFS_TRACE_TRACING,
3063 (TSTR("Collecting block %d, in use %d, shrink %d, wholeBlock %d" TENDSTR),
3066 bi->hasShrinkHeader,
3069 /*yaffs_VerifyFreeChunks(dev); */
3071 if(bi->blockState == YAFFS_BLOCK_STATE_FULL)
3072 bi->blockState = YAFFS_BLOCK_STATE_COLLECTING;
3074 bi->hasShrinkHeader = 0; /* clear the flag so that the block can erase */
3076 /* Take off the number of soft deleted entries because
3077 * they're going to get really deleted during GC.
3079 if(dev->gcChunk == 0) /* first time through for this block */
3080 dev->nFreeChunks -= bi->softDeletions;
3084 if (isCheckpointBlock ||
3085 !yaffs_StillSomeChunkBits(dev, block)) {
3086 T(YAFFS_TRACE_TRACING,
3088 ("Collecting block %d that has no chunks in use" TENDSTR),
3090 yaffs_BlockBecameDirty(dev, block);
3093 __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__);
3095 yaffs_VerifyBlock(dev, bi, block);
3097 maxCopies = (wholeBlock) ? dev->nChunksPerBlock : 10;
3098 oldChunk = block * dev->nChunksPerBlock + dev->gcChunk;
3100 for (/* init already done */;
3101 retVal == YAFFS_OK &&
3102 dev->gcChunk < dev->nChunksPerBlock &&
3103 (bi->blockState == YAFFS_BLOCK_STATE_COLLECTING) &&
3105 dev->gcChunk++, oldChunk++) {
3106 if (yaffs_CheckChunkBit(dev, block, dev->gcChunk)) {
3108 /* This page is in use and might need to be copied off */
3114 yaffs_InitialiseTags(&tags);
3116 yaffs_ReadChunkWithTagsFromNAND(dev, oldChunk,
3120 yaffs_FindObjectByNumber(dev,
3123 T(YAFFS_TRACE_GC_DETAIL,
3125 ("Collecting chunk in block %d, %d %d %d " TENDSTR),
3126 dev->gcChunk, tags.objectId, tags.chunkId,
3129 if (object && !yaffs_SkipVerification(dev)) {
3130 if (tags.chunkId == 0)
3131 matchingChunk = object->hdrChunk;
3132 else if (object->softDeleted)
3133 matchingChunk = oldChunk; /* Defeat the test */
3135 matchingChunk = yaffs_FindChunkInFile(object, tags.chunkId, NULL);
3137 if (oldChunk != matchingChunk)
3138 T(YAFFS_TRACE_ERROR,
3139 (TSTR("gc: page in gc mismatch: %d %d %d %d"TENDSTR),
3140 oldChunk, matchingChunk, tags.objectId, tags.chunkId));
3145 T(YAFFS_TRACE_ERROR,
3147 ("page %d in gc has no object: %d %d %d "
3149 tags.objectId, tags.chunkId, tags.byteCount));
3154 object->softDeleted &&
3155 tags.chunkId != 0) {
3156 /* Data chunk in a soft deleted file, throw it away
3157 * It's a soft deleted data chunk,
3158 * No need to copy this, just forget about it and
3159 * fix up the object.
3162 object->nDataChunks--;
3164 if (object->nDataChunks <= 0) {
3165 /* remeber to clean up the object */
3166 dev->gcCleanupList[cleanups] =
3172 /* Todo object && object->deleted && object->nDataChunks == 0 */
3173 /* Deleted object header with no data chunks.
3174 * Can be discarded and the file deleted.
3176 object->hdrChunk = 0;
3177 yaffs_FreeTnode(object->myDev,
3180 object->variant.fileVariant.top = NULL;
3181 yaffs_DoGenericObjectDeletion(object);
3183 } else if (object) {
3184 /* It's either a data chunk in a live file or
3185 * an ObjectHeader, so we're interested in it.
3186 * NB Need to keep the ObjectHeaders of deleted files
3187 * until the whole file has been deleted off
3189 tags.serialNumber++;
3193 if (tags.chunkId == 0) {
3194 /* It is an object Id,
3195 * We need to nuke the shrinkheader flags first
3196 * Also need to clean up shadowing.
3197 * We no longer want the shrinkHeader flag since its work is done
3198 * and if it is left in place it will mess up scanning.
3201 yaffs_ObjectHeader *oh;
3202 oh = (yaffs_ObjectHeader *)buffer;
3204 tags.extraIsShrinkHeader = 0;
3205 oh->shadowsObject = 0;
3206 oh->inbandShadowsObject = 0;
3207 tags.extraShadows = 0;
3209 yaffs_VerifyObjectHeader(object, oh, &tags, 1);
3213 yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &tags, 1);
3216 retVal = YAFFS_FAIL;
3219 /* Ok, now fix up the Tnodes etc. */
3221 if (tags.chunkId == 0) {
3223 object->hdrChunk = newChunk;
3224 object->serial = tags.serialNumber;
3226 /* It's a data chunk */
3227 yaffs_PutChunkIntoFile
3235 if (retVal == YAFFS_OK)
3236 yaffs_DeleteChunk(dev, oldChunk, markNAND, __LINE__);
3241 yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
3244 /* Do any required cleanups */
3245 for (i = 0; i < cleanups; i++) {
3246 /* Time to delete the file too */
3248 yaffs_FindObjectByNumber(dev,
3249 dev->gcCleanupList[i]);
3251 yaffs_FreeTnode(dev,
3252 object->variant.fileVariant.
3254 object->variant.fileVariant.top = NULL;
3257 ("yaffs: About to finally delete object %d"
3258 TENDSTR), object->objectId));
3259 yaffs_DoGenericObjectDeletion(object);
3260 object->myDev->nDeletedFiles--;
3267 yaffs_VerifyCollectedBlock(dev, bi, block);
3269 chunksAfter = yaffs_GetErasedChunks(dev);
3270 if (chunksBefore >= chunksAfter) {
3273 ("gc did not increase free chunks before %d after %d"
3274 TENDSTR), chunksBefore, chunksAfter));
3277 /* If the gc completed then clear the current gcBlock so that we find another. */
3278 if (bi->blockState != YAFFS_BLOCK_STATE_COLLECTING) {
3288 /* New garbage collector
3289 * If we're very low on erased blocks then we do aggressive garbage collection
3290 * otherwise we do "leasurely" garbage collection.
3291 * Aggressive gc looks further (whole array) and will accept less dirty blocks.
3292 * Passive gc only inspects smaller areas and will only accept more dirty blocks.
3294 * The idea is to help clear out space in a more spread-out manner.
3295 * Dunno if it really does anything useful.
3297 static int yaffs_CheckGarbageCollection(yaffs_Device *dev)
3301 int gcOk = YAFFS_OK;
3304 int checkpointBlockAdjust;
3306 if (dev->isDoingGC) {
3307 /* Bail out so we don't get recursive gc */
3311 /* This loop should pass the first time.
3312 * We'll only see looping here if the erase of the collected block fails.
3318 checkpointBlockAdjust = yaffs_CalcCheckpointBlocksRequired(dev) - dev->blocksInCheckpoint;
3319 if (checkpointBlockAdjust < 0)
3320 checkpointBlockAdjust = 0;
3322 if (dev->nErasedBlocks < (dev->nReservedBlocks + checkpointBlockAdjust + 2)) {
3323 /* We need a block soon...*/
3326 /* We're in no hurry */
3330 if (dev->gcBlock <= 0) {
3331 dev->gcBlock = yaffs_FindBlockForGarbageCollection(dev, aggressive);
3335 block = dev->gcBlock;
3338 dev->garbageCollections++;
3340 dev->passiveGarbageCollections++;
3344 ("yaffs: GC erasedBlocks %d aggressive %d" TENDSTR),
3345 dev->nErasedBlocks, aggressive));
3347 gcOk = yaffs_GarbageCollectBlock(dev, block, aggressive);
3350 if (dev->nErasedBlocks < (dev->nReservedBlocks) && block > 0) {
3353 ("yaffs: GC !!!no reclaim!!! erasedBlocks %d after try %d block %d"
3354 TENDSTR), dev->nErasedBlocks, maxTries, block));
3356 } while ((dev->nErasedBlocks < dev->nReservedBlocks) &&
3360 return aggressive ? gcOk : YAFFS_OK;
3363 /*------------------------- TAGS --------------------------------*/
3365 static int yaffs_TagsMatch(const yaffs_ExtendedTags *tags, int objectId,
3368 return (tags->chunkId == chunkInObject &&
3369 tags->objectId == objectId && !tags->chunkDeleted) ? 1 : 0;
3374 /*-------------------- Data file manipulation -----------------*/
3376 static int yaffs_FindChunkInFile(yaffs_Object *in, int chunkInInode,
3377 yaffs_ExtendedTags *tags)
3379 /*Get the Tnode, then get the level 0 offset chunk offset */
3382 yaffs_ExtendedTags localTags;
3385 yaffs_Device *dev = in->myDev;
3388 /* Passed a NULL, so use our own tags space */
3392 tn = yaffs_FindLevel0Tnode(dev, &in->variant.fileVariant, chunkInInode);
3395 theChunk = yaffs_GetChunkGroupBase(dev, tn, chunkInInode);
3398 yaffs_FindChunkInGroup(dev, theChunk, tags, in->objectId,
3404 static int yaffs_FindAndDeleteChunkInFile(yaffs_Object *in, int chunkInInode,
3405 yaffs_ExtendedTags *tags)
3407 /* Get the Tnode, then get the level 0 offset chunk offset */
3410 yaffs_ExtendedTags localTags;
3412 yaffs_Device *dev = in->myDev;
3416 /* Passed a NULL, so use our own tags space */
3420 tn = yaffs_FindLevel0Tnode(dev, &in->variant.fileVariant, chunkInInode);
3424 theChunk = yaffs_GetChunkGroupBase(dev, tn, chunkInInode);
3427 yaffs_FindChunkInGroup(dev, theChunk, tags, in->objectId,
3430 /* Delete the entry in the filestructure (if found) */
3432 yaffs_LoadLevel0Tnode(dev, tn, chunkInInode, 0);
3438 #ifdef YAFFS_PARANOID
3440 static int yaffs_CheckFileSanity(yaffs_Object *in)
3448 yaffs_Tags localTags;
3449 yaffs_Tags *tags = &localTags;
3453 if (in->variantType != YAFFS_OBJECT_TYPE_FILE)
3456 objId = in->objectId;
3457 fSize = in->variant.fileVariant.fileSize;
3459 (fSize + in->myDev->nDataBytesPerChunk - 1) / in->myDev->nDataBytesPerChunk;
3461 for (chunk = 1; chunk <= nChunks; chunk++) {
3462 tn = yaffs_FindLevel0Tnode(in->myDev, &in->variant.fileVariant,
3467 theChunk = yaffs_GetChunkGroupBase(dev, tn, chunk);
3469 if (yaffs_CheckChunkBits
3470 (dev, theChunk / dev->nChunksPerBlock,
3471 theChunk % dev->nChunksPerBlock)) {
3473 yaffs_ReadChunkTagsFromNAND(in->myDev, theChunk,
3477 (tags, in->objectId, chunk, chunkDeleted)) {
3487 /* T(("No level 0 found for %d\n", chunk)); */
3491 return failed ? YAFFS_FAIL : YAFFS_OK;
3496 static int yaffs_PutChunkIntoFile(yaffs_Object *in, int chunkInInode,
3497 int chunkInNAND, int inScan)
3499 /* NB inScan is zero unless scanning.
3500 * For forward scanning, inScan is > 0;
3501 * for backward scanning inScan is < 0
3503 * chunkInNAND = 0 is a dummy insert to make sure the tnodes are there.
3507 yaffs_Device *dev = in->myDev;
3509 yaffs_ExtendedTags existingTags;
3510 yaffs_ExtendedTags newTags;
3511 unsigned existingSerial, newSerial;
3513 if (in->variantType != YAFFS_OBJECT_TYPE_FILE) {
3514 /* Just ignore an attempt at putting a chunk into a non-file during scanning
3515 * If it is not during Scanning then something went wrong!
3518 T(YAFFS_TRACE_ERROR,
3520 ("yaffs tragedy:attempt to put data chunk into a non-file"
3525 yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__);
3529 tn = yaffs_AddOrFindLevel0Tnode(dev,
3530 &in->variant.fileVariant,
3537 /* Dummy insert, bail now */
3541 existingChunk = yaffs_GetChunkGroupBase(dev, tn, chunkInInode);
3544 /* If we're scanning then we need to test for duplicates
3545 * NB This does not need to be efficient since it should only ever
3546 * happen when the power fails during a write, then only one
3547 * chunk should ever be affected.
3549 * Correction for YAFFS2: This could happen quite a lot and we need to think about efficiency! TODO
3550 * Update: For backward scanning we don't need to re-read tags so this is quite cheap.
3553 if (existingChunk > 0) {
3554 /* NB Right now existing chunk will not be real chunkId if the device >= 32MB
3555 * thus we have to do a FindChunkInFile to get the real chunk id.
3557 * We have a duplicate now we need to decide which one to use:
3559 * Backwards scanning YAFFS2: The old one is what we use, dump the new one.
3560 * Forward scanning YAFFS2: The new one is what we use, dump the old one.
3561 * YAFFS1: Get both sets of tags and compare serial numbers.
3565 /* Only do this for forward scanning */
3566 yaffs_ReadChunkWithTagsFromNAND(dev,
3570 /* Do a proper find */
3572 yaffs_FindChunkInFile(in, chunkInInode,
3576 if (existingChunk <= 0) {
3577 /*Hoosterman - how did this happen? */
3579 T(YAFFS_TRACE_ERROR,
3581 ("yaffs tragedy: existing chunk < 0 in scan"
3586 /* NB The deleted flags should be false, otherwise the chunks will
3587 * not be loaded during a scan
3591 newSerial = newTags.serialNumber;
3592 existingSerial = existingTags.serialNumber;
3596 (in->myDev->isYaffs2 ||
3597 existingChunk <= 0 ||
3598 ((existingSerial + 1) & 3) == newSerial)) {
3599 /* Forward scanning.
3601 * Delete the old one and drop through to update the tnode
3603 yaffs_DeleteChunk(dev, existingChunk, 1,
3606 /* Backward scanning or we want to use the existing one
3608 * Delete the new one and return early so that the tnode isn't changed
3610 yaffs_DeleteChunk(dev, chunkInNAND, 1,
3618 if (existingChunk == 0)
3621 yaffs_LoadLevel0Tnode(dev, tn, chunkInInode, chunkInNAND);
3626 static int yaffs_ReadChunkDataFromObject(yaffs_Object *in, int chunkInInode,
3629 int chunkInNAND = yaffs_FindChunkInFile(in, chunkInInode, NULL);
3631 if (chunkInNAND >= 0)
3632 return yaffs_ReadChunkWithTagsFromNAND(in->myDev, chunkInNAND,
3635 T(YAFFS_TRACE_NANDACCESS,
3636 (TSTR("Chunk %d not found zero instead" TENDSTR),
3638 /* get sane (zero) data if you read a hole */
3639 memset(buffer, 0, in->myDev->nDataBytesPerChunk);
3645 void yaffs_DeleteChunk(yaffs_Device *dev, int chunkId, int markNAND, int lyn)
3649 yaffs_ExtendedTags tags;
3650 yaffs_BlockInfo *bi;
3656 block = chunkId / dev->nChunksPerBlock;
3657 page = chunkId % dev->nChunksPerBlock;
3660 if (!yaffs_CheckChunkBit(dev, block, page))
3661 T(YAFFS_TRACE_VERIFY,
3662 (TSTR("Deleting invalid chunk %d"TENDSTR),
3665 bi = yaffs_GetBlockInfo(dev, block);
3667 T(YAFFS_TRACE_DELETION,
3668 (TSTR("line %d delete of chunk %d" TENDSTR), lyn, chunkId));
3671 bi->blockState != YAFFS_BLOCK_STATE_COLLECTING && !dev->isYaffs2) {
3673 yaffs_InitialiseTags(&tags);
3675 tags.chunkDeleted = 1;
3677 yaffs_WriteChunkWithTagsToNAND(dev, chunkId, NULL, &tags);
3678 yaffs_HandleUpdateChunk(dev, chunkId, &tags);
3680 dev->nUnmarkedDeletions++;
3683 /* Pull out of the management area.
3684 * If the whole block became dirty, this will kick off an erasure.
3686 if (bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING ||
3687 bi->blockState == YAFFS_BLOCK_STATE_FULL ||
3688 bi->blockState == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
3689 bi->blockState == YAFFS_BLOCK_STATE_COLLECTING) {
3692 yaffs_ClearChunkBit(dev, block, page);
3696 if (bi->pagesInUse == 0 &&
3697 !bi->hasShrinkHeader &&
3698 bi->blockState != YAFFS_BLOCK_STATE_ALLOCATING &&
3699 bi->blockState != YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
3700 yaffs_BlockBecameDirty(dev, block);
3707 static int yaffs_WriteChunkDataToObject(yaffs_Object *in, int chunkInInode,
3708 const __u8 *buffer, int nBytes,
3711 /* Find old chunk Need to do this to get serial number
3712 * Write new one and patch into tree.
3713 * Invalidate old tags.
3717 yaffs_ExtendedTags prevTags;
3720 yaffs_ExtendedTags newTags;
3722 yaffs_Device *dev = in->myDev;
3724 yaffs_CheckGarbageCollection(dev);
3726 /* Get the previous chunk at this location in the file if it exists */
3727 prevChunkId = yaffs_FindChunkInFile(in, chunkInInode, &prevTags);
3729 /* Set up new tags */
3730 yaffs_InitialiseTags(&newTags);
3732 newTags.chunkId = chunkInInode;
3733 newTags.objectId = in->objectId;
3734 newTags.serialNumber =
3735 (prevChunkId > 0) ? prevTags.serialNumber + 1 : 1;
3736 newTags.byteCount = nBytes;
3738 if (nBytes < 1 || nBytes > dev->totalBytesPerChunk) {
3739 T(YAFFS_TRACE_ERROR,
3740 (TSTR("Writing %d bytes to chunk!!!!!!!!!" TENDSTR), nBytes));
3745 * If there isn't already a chunk there then do a dummy
3746 * insert to make sue we have the desired tnode structure.
3748 if(prevChunkId < 1 &&
3749 yaffs_PutChunkIntoFile(in, chunkInInode, 0, 0) != YAFFS_OK)
3753 yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &newTags,
3756 if (newChunkId > 0) {
3757 yaffs_PutChunkIntoFile(in, chunkInInode, newChunkId, 0);
3759 if (prevChunkId > 0)
3760 yaffs_DeleteChunk(dev, prevChunkId, 1, __LINE__);
3762 yaffs_CheckFileSanity(in);
3768 /* UpdateObjectHeader updates the header on NAND for an object.
3769 * If name is not NULL, then that new name is used.
3771 int yaffs_UpdateObjectHeader(yaffs_Object *in, const YCHAR *name, int force,
3772 int isShrink, int shadows)
3775 yaffs_BlockInfo *bi;
3777 yaffs_Device *dev = in->myDev;
3784 yaffs_ExtendedTags newTags;
3785 yaffs_ExtendedTags oldTags;
3786 YCHAR *alias = NULL;
3788 __u8 *buffer = NULL;
3789 YCHAR oldName[YAFFS_MAX_NAME_LENGTH + 1];
3791 yaffs_ObjectHeader *oh = NULL;
3793 yaffs_strcpy(oldName, _Y("silly old name"));
3797 in == dev->rootDir || /* The rootDir should also be saved */
3800 yaffs_CheckGarbageCollection(dev);
3801 yaffs_CheckObjectDetailsLoaded(in);
3803 buffer = yaffs_GetTempBuffer(in->myDev, __LINE__);
3804 oh = (yaffs_ObjectHeader *) buffer;
3806 prevChunkId = in->hdrChunk;
3808 if (prevChunkId > 0) {
3809 result = yaffs_ReadChunkWithTagsFromNAND(dev, prevChunkId,
3812 yaffs_VerifyObjectHeader(in, oh, &oldTags, 0);
3814 memcpy(oldName, oh->name, sizeof(oh->name));
3817 memset(buffer, 0xFF, dev->nDataBytesPerChunk);
3819 oh->type = in->variantType;
3820 oh->yst_mode = in->yst_mode;
3821 oh->shadowsObject = oh->inbandShadowsObject = shadows;
3823 #ifdef CONFIG_YAFFS_WINCE
3824 oh->win_atime[0] = in->win_atime[0];
3825 oh->win_ctime[0] = in->win_ctime[0];
3826 oh->win_mtime[0] = in->win_mtime[0];
3827 oh->win_atime[1] = in->win_atime[1];
3828 oh->win_ctime[1] = in->win_ctime[1];
3829 oh->win_mtime[1] = in->win_mtime[1];
3831 oh->yst_uid = in->yst_uid;
3832 oh->yst_gid = in->yst_gid;
3833 oh->yst_atime = in->yst_atime;
3834 oh->yst_mtime = in->yst_mtime;
3835 oh->yst_ctime = in->yst_ctime;
3836 oh->yst_rdev = in->yst_rdev;
3839 oh->parentObjectId = in->parent->objectId;
3841 oh->parentObjectId = 0;
3843 if (name && *name) {
3844 memset(oh->name, 0, sizeof(oh->name));
3845 yaffs_strncpy(oh->name, name, YAFFS_MAX_NAME_LENGTH);
3846 } else if (prevChunkId > 0)
3847 memcpy(oh->name, oldName, sizeof(oh->name));
3849 memset(oh->name, 0, sizeof(oh->name));
3851 oh->isShrink = isShrink;
3853 switch (in->variantType) {
3854 case YAFFS_OBJECT_TYPE_UNKNOWN:
3855 /* Should not happen */
3857 case YAFFS_OBJECT_TYPE_FILE:
3859 (oh->parentObjectId == YAFFS_OBJECTID_DELETED
3860 || oh->parentObjectId ==
3861 YAFFS_OBJECTID_UNLINKED) ? 0 : in->variant.
3862 fileVariant.fileSize;
3864 case YAFFS_OBJECT_TYPE_HARDLINK:
3865 oh->equivalentObjectId =
3866 in->variant.hardLinkVariant.equivalentObjectId;
3868 case YAFFS_OBJECT_TYPE_SPECIAL:
3871 case YAFFS_OBJECT_TYPE_DIRECTORY:
3874 case YAFFS_OBJECT_TYPE_SYMLINK:
3875 alias = in->variant.symLinkVariant.alias;
3877 alias = _Y("no alias");
3878 yaffs_strncpy(oh->alias,
3880 YAFFS_MAX_ALIAS_LENGTH);
3881 oh->alias[YAFFS_MAX_ALIAS_LENGTH] = 0;
3886 yaffs_InitialiseTags(&newTags);
3888 newTags.chunkId = 0;
3889 newTags.objectId = in->objectId;
3890 newTags.serialNumber = in->serial;
3892 /* Add extra info for file header */
3894 newTags.extraHeaderInfoAvailable = 1;
3895 newTags.extraParentObjectId = oh->parentObjectId;
3896 newTags.extraFileLength = oh->fileSize;
3897 newTags.extraIsShrinkHeader = oh->isShrink;
3898 newTags.extraEquivalentObjectId = oh->equivalentObjectId;
3899 newTags.extraShadows = (oh->shadowsObject > 0) ? 1 : 0;
3900 newTags.extraObjectType = in->variantType;
3902 yaffs_VerifyObjectHeader(in, oh, &newTags, 1);
3904 /* Create new chunk in NAND */
3906 yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &newTags,
3907 (prevChunkId > 0) ? 1 : 0);
3909 if (newChunkId >= 0) {
3911 in->hdrChunk = newChunkId;
3913 if (prevChunkId > 0) {
3914 yaffs_DeleteChunk(dev, prevChunkId, 1,
3918 if (!yaffs_ObjectHasCachedWriteData(in))
3921 /* If this was a shrink, then mark the block that the chunk lives on */
3923 bi = yaffs_GetBlockInfo(in->myDev,
3924 newChunkId / in->myDev->nChunksPerBlock);
3925 bi->hasShrinkHeader = 1;
3930 retVal = newChunkId;
3935 yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
3940 /*------------------------ Short Operations Cache ----------------------------------------
3941 * In many situations where there is no high level buffering (eg WinCE) a lot of
3942 * reads might be short sequential reads, and a lot of writes may be short
3943 * sequential writes. eg. scanning/writing a jpeg file.
3944 * In these cases, a short read/write cache can provide a huge perfomance benefit
3945 * with dumb-as-a-rock code.
3946 * In Linux, the page cache provides read buffering aand the short op cache provides write
3949 * There are a limited number (~10) of cache chunks per device so that we don't
3950 * need a very intelligent search.
3953 static int yaffs_ObjectHasCachedWriteData(yaffs_Object *obj)
3955 yaffs_Device *dev = obj->myDev;
3957 yaffs_ChunkCache *cache;
3958 int nCaches = obj->myDev->nShortOpCaches;
3960 for (i = 0; i < nCaches; i++) {
3961 cache = &dev->srCache[i];
3962 if (cache->object == obj &&
3971 static void yaffs_FlushFilesChunkCache(yaffs_Object *obj)
3973 yaffs_Device *dev = obj->myDev;
3974 int lowest = -99; /* Stop compiler whining. */
3976 yaffs_ChunkCache *cache;
3977 int chunkWritten = 0;
3978 int nCaches = obj->myDev->nShortOpCaches;
3984 /* Find the dirty cache for this object with the lowest chunk id. */
3985 for (i = 0; i < nCaches; i++) {
3986 if (dev->srCache[i].object == obj &&
3987 dev->srCache[i].dirty) {
3989 || dev->srCache[i].chunkId <
3991 cache = &dev->srCache[i];
3992 lowest = cache->chunkId;
3997 if (cache && !cache->locked) {
3998 /* Write it out and free it up */
4001 yaffs_WriteChunkDataToObject(cache->object,
4007 cache->object = NULL;
4010 } while (cache && chunkWritten > 0);
4013 /* Hoosterman, disk full while writing cache out. */
4014 T(YAFFS_TRACE_ERROR,
4015 (TSTR("yaffs tragedy: no space during cache write" TENDSTR)));
4022 /*yaffs_FlushEntireDeviceCache(dev)
4027 void yaffs_FlushEntireDeviceCache(yaffs_Device *dev)
4030 int nCaches = dev->nShortOpCaches;
4033 /* Find a dirty object in the cache and flush it...
4034 * until there are no further dirty objects.
4038 for (i = 0; i < nCaches && !obj; i++) {
4039 if (dev->srCache[i].object &&
4040 dev->srCache[i].dirty)
4041 obj = dev->srCache[i].object;
4045 yaffs_FlushFilesChunkCache(obj);
4052 /* Grab us a cache chunk for use.
4053 * First look for an empty one.
4054 * Then look for the least recently used non-dirty one.
4055 * Then look for the least recently used dirty one...., flush and look again.
4057 static yaffs_ChunkCache *yaffs_GrabChunkCacheWorker(yaffs_Device *dev)
4061 if (dev->nShortOpCaches > 0) {
4062 for (i = 0; i < dev->nShortOpCaches; i++) {
4063 if (!dev->srCache[i].object)
4064 return &dev->srCache[i];
4071 static yaffs_ChunkCache *yaffs_GrabChunkCache(yaffs_Device *dev)
4073 yaffs_ChunkCache *cache;
4074 yaffs_Object *theObj;
4079 if (dev->nShortOpCaches > 0) {
4080 /* Try find a non-dirty one... */
4082 cache = yaffs_GrabChunkCacheWorker(dev);
4085 /* They were all dirty, find the last recently used object and flush
4086 * its cache, then find again.
4087 * NB what's here is not very accurate, we actually flush the object
4088 * the last recently used page.
4091 /* With locking we can't assume we can use entry zero */
4098 for (i = 0; i < dev->nShortOpCaches; i++) {
4099 if (dev->srCache[i].object &&
4100 !dev->srCache[i].locked &&
4101 (dev->srCache[i].lastUse < usage || !cache)) {
4102 usage = dev->srCache[i].lastUse;
4103 theObj = dev->srCache[i].object;
4104 cache = &dev->srCache[i];
4109 if (!cache || cache->dirty) {
4110 /* Flush and try again */
4111 yaffs_FlushFilesChunkCache(theObj);
4112 cache = yaffs_GrabChunkCacheWorker(dev);
4122 /* Find a cached chunk */
4123 static yaffs_ChunkCache *yaffs_FindChunkCache(const yaffs_Object *obj,
4126 yaffs_Device *dev = obj->myDev;
4128 if (dev->nShortOpCaches > 0) {
4129 for (i = 0; i < dev->nShortOpCaches; i++) {
4130 if (dev->srCache[i].object == obj &&
4131 dev->srCache[i].chunkId == chunkId) {
4134 return &dev->srCache[i];
4141 /* Mark the chunk for the least recently used algorithym */
4142 static void yaffs_UseChunkCache(yaffs_Device *dev, yaffs_ChunkCache *cache,
4146 if (dev->nShortOpCaches > 0) {
4147 if (dev->srLastUse < 0 || dev->srLastUse > 100000000) {
4148 /* Reset the cache usages */
4150 for (i = 1; i < dev->nShortOpCaches; i++)
4151 dev->srCache[i].lastUse = 0;
4158 cache->lastUse = dev->srLastUse;
4165 /* Invalidate a single cache page.
4166 * Do this when a whole page gets written,
4167 * ie the short cache for this page is no longer valid.
4169 static void yaffs_InvalidateChunkCache(yaffs_Object *object, int chunkId)
4171 if (object->myDev->nShortOpCaches > 0) {
4172 yaffs_ChunkCache *cache = yaffs_FindChunkCache(object, chunkId);
4175 cache->object = NULL;
4179 /* Invalidate all the cache pages associated with this object
4180 * Do this whenever ther file is deleted or resized.
4182 static void yaffs_InvalidateWholeChunkCache(yaffs_Object *in)
4185 yaffs_Device *dev = in->myDev;
4187 if (dev->nShortOpCaches > 0) {
4188 /* Invalidate it. */
4189 for (i = 0; i < dev->nShortOpCaches; i++) {
4190 if (dev->srCache[i].object == in)
4191 dev->srCache[i].object = NULL;
4196 /*--------------------- Checkpointing --------------------*/
4199 static int yaffs_WriteCheckpointValidityMarker(yaffs_Device *dev, int head)
4201 yaffs_CheckpointValidity cp;
4203 memset(&cp, 0, sizeof(cp));
4205 cp.structType = sizeof(cp);
4206 cp.magic = YAFFS_MAGIC;
4207 cp.version = YAFFS_CHECKPOINT_VERSION;
4208 cp.head = (head) ? 1 : 0;
4210 return (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp)) ?
4214 static int yaffs_ReadCheckpointValidityMarker(yaffs_Device *dev, int head)
4216 yaffs_CheckpointValidity cp;
4219 ok = (yaffs_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp));
4222 ok = (cp.structType == sizeof(cp)) &&
4223 (cp.magic == YAFFS_MAGIC) &&
4224 (cp.version == YAFFS_CHECKPOINT_VERSION) &&
4225 (cp.head == ((head) ? 1 : 0));
4229 static void yaffs_DeviceToCheckpointDevice(yaffs_CheckpointDevice *cp,
4232 cp->nErasedBlocks = dev->nErasedBlocks;
4233 cp->allocationBlock = dev->allocationBlock;
4234 cp->allocationPage = dev->allocationPage;
4235 cp->nFreeChunks = dev->nFreeChunks;
4237 cp->nDeletedFiles = dev->nDeletedFiles;
4238 cp->nUnlinkedFiles = dev->nUnlinkedFiles;
4239 cp->nBackgroundDeletions = dev->nBackgroundDeletions;
4240 cp->sequenceNumber = dev->sequenceNumber;
4241 cp->oldestDirtySequence = dev->oldestDirtySequence;
4245 static void yaffs_CheckpointDeviceToDevice(yaffs_Device *dev,
4246 yaffs_CheckpointDevice *cp)
4248 dev->nErasedBlocks = cp->nErasedBlocks;
4249 dev->allocationBlock = cp->allocationBlock;
4250 dev->allocationPage = cp->allocationPage;
4251 dev->nFreeChunks = cp->nFreeChunks;
4253 dev->nDeletedFiles = cp->nDeletedFiles;
4254 dev->nUnlinkedFiles = cp->nUnlinkedFiles;
4255 dev->nBackgroundDeletions = cp->nBackgroundDeletions;
4256 dev->sequenceNumber = cp->sequenceNumber;
4257 dev->oldestDirtySequence = cp->oldestDirtySequence;
4261 static int yaffs_WriteCheckpointDevice(yaffs_Device *dev)
4263 yaffs_CheckpointDevice cp;
4265 __u32 nBlocks = (dev->internalEndBlock - dev->internalStartBlock + 1);
4269 /* Write device runtime values*/
4270 yaffs_DeviceToCheckpointDevice(&cp, dev);
4271 cp.structType = sizeof(cp);
4273 ok = (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp));
4275 /* Write block info */
4277 nBytes = nBlocks * sizeof(yaffs_BlockInfo);
4278 ok = (yaffs_CheckpointWrite(dev, dev->blockInfo, nBytes) == nBytes);
4281 /* Write chunk bits */
4283 nBytes = nBlocks * dev->chunkBitmapStride;
4284 ok = (yaffs_CheckpointWrite(dev, dev->chunkBits, nBytes) == nBytes);
4290 static int yaffs_ReadCheckpointDevice(yaffs_Device *dev)
4292 yaffs_CheckpointDevice cp;
4294 __u32 nBlocks = (dev->internalEndBlock - dev->internalStartBlock + 1);
4298 ok = (yaffs_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp));
4302 if (cp.structType != sizeof(cp))
4306 yaffs_CheckpointDeviceToDevice(dev, &cp);
4308 nBytes = nBlocks * sizeof(yaffs_BlockInfo);
4310 ok = (yaffs_CheckpointRead(dev, dev->blockInfo, nBytes) == nBytes);
4314 nBytes = nBlocks * dev->chunkBitmapStride;
4316 ok = (yaffs_CheckpointRead(dev, dev->chunkBits, nBytes) == nBytes);
4321 static void yaffs_ObjectToCheckpointObject(yaffs_CheckpointObject *cp,
4325 cp->objectId = obj->objectId;
4326 cp->parentId = (obj->parent) ? obj->parent->objectId : 0;
4327 cp->hdrChunk = obj->hdrChunk;
4328 cp->variantType = obj->variantType;
4329 cp->deleted = obj->deleted;
4330 cp->softDeleted = obj->softDeleted;
4331 cp->unlinked = obj->unlinked;
4332 cp->fake = obj->fake;
4333 cp->renameAllowed = obj->renameAllowed;
4334 cp->unlinkAllowed = obj->unlinkAllowed;
4335 cp->serial = obj->serial;
4336 cp->nDataChunks = obj->nDataChunks;
4338 if (obj->variantType == YAFFS_OBJECT_TYPE_FILE)
4339 cp->fileSizeOrEquivalentObjectId = obj->variant.fileVariant.fileSize;
4340 else if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK)
4341 cp->fileSizeOrEquivalentObjectId = obj->variant.hardLinkVariant.equivalentObjectId;
4344 static int yaffs_CheckpointObjectToObject(yaffs_Object *obj, yaffs_CheckpointObject *cp)
4347 yaffs_Object *parent;
4349 if (obj->variantType != cp->variantType) {
4350 T(YAFFS_TRACE_ERROR, (TSTR("Checkpoint read object %d type %d "
4351 TCONT("chunk %d does not match existing object type %d")
4352 TENDSTR), cp->objectId, cp->variantType, cp->hdrChunk,
4357 obj->objectId = cp->objectId;
4360 parent = yaffs_FindOrCreateObjectByNumber(
4363 YAFFS_OBJECT_TYPE_DIRECTORY);
4368 if (parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
4369 T(YAFFS_TRACE_ALWAYS, (TSTR("Checkpoint read object %d parent %d type %d"
4370 TCONT(" chunk %d Parent type, %d, not directory")
4372 cp->objectId, cp->parentId, cp->variantType,
4373 cp->hdrChunk, parent->variantType));
4376 yaffs_AddObjectToDirectory(parent, obj);
4379 obj->hdrChunk = cp->hdrChunk;
4380 obj->variantType = cp->variantType;
4381 obj->deleted = cp->deleted;
4382 obj->softDeleted = cp->softDeleted;
4383 obj->unlinked = cp->unlinked;
4384 obj->fake = cp->fake;
4385 obj->renameAllowed = cp->renameAllowed;
4386 obj->unlinkAllowed = cp->unlinkAllowed;
4387 obj->serial = cp->serial;
4388 obj->nDataChunks = cp->nDataChunks;
4390 if (obj->variantType == YAFFS_OBJECT_TYPE_FILE)
4391 obj->variant.fileVariant.fileSize = cp->fileSizeOrEquivalentObjectId;
4392 else if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK)
4393 obj->variant.hardLinkVariant.equivalentObjectId = cp->fileSizeOrEquivalentObjectId;
4395 if (obj->hdrChunk > 0)
4396 obj->lazyLoaded = 1;
4402 static int yaffs_CheckpointTnodeWorker(yaffs_Object *in, yaffs_Tnode *tn,
4403 __u32 level, int chunkOffset)
4406 yaffs_Device *dev = in->myDev;
4408 int tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
4410 if (tnodeSize < sizeof(yaffs_Tnode))
4411 tnodeSize = sizeof(yaffs_Tnode);
4417 for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++) {
4418 if (tn->internal[i]) {
4419 ok = yaffs_CheckpointTnodeWorker(in,
4422 (chunkOffset<<YAFFS_TNODES_INTERNAL_BITS) + i);
4425 } else if (level == 0) {
4426 __u32 baseOffset = chunkOffset << YAFFS_TNODES_LEVEL0_BITS;
4427 ok = (yaffs_CheckpointWrite(dev, &baseOffset, sizeof(baseOffset)) == sizeof(baseOffset));
4429 ok = (yaffs_CheckpointWrite(dev, tn, tnodeSize) == tnodeSize);
4437 static int yaffs_WriteCheckpointTnodes(yaffs_Object *obj)
4439 __u32 endMarker = ~0;
4442 if (obj->variantType == YAFFS_OBJECT_TYPE_FILE) {
4443 ok = yaffs_CheckpointTnodeWorker(obj,
4444 obj->variant.fileVariant.top,
4445 obj->variant.fileVariant.topLevel,
4448 ok = (yaffs_CheckpointWrite(obj->myDev, &endMarker, sizeof(endMarker)) ==
4455 static int yaffs_ReadCheckpointTnodes(yaffs_Object *obj)
4459 yaffs_Device *dev = obj->myDev;
4460 yaffs_FileStructure *fileStructPtr = &obj->variant.fileVariant;
4463 int tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
4465 if (tnodeSize < sizeof(yaffs_Tnode))
4466 tnodeSize = sizeof(yaffs_Tnode);
4468 ok = (yaffs_CheckpointRead(dev, &baseChunk, sizeof(baseChunk)) == sizeof(baseChunk));
4470 while (ok && (~baseChunk)) {
4472 /* Read level 0 tnode */
4475 tn = yaffs_GetTnodeRaw(dev);
4477 ok = (yaffs_CheckpointRead(dev, tn, tnodeSize) == tnodeSize);
4482 ok = yaffs_AddOrFindLevel0Tnode(dev,
4488 ok = (yaffs_CheckpointRead(dev, &baseChunk, sizeof(baseChunk)) == sizeof(baseChunk));
4492 T(YAFFS_TRACE_CHECKPOINT, (
4493 TSTR("Checkpoint read tnodes %d records, last %d. ok %d" TENDSTR),
4494 nread, baseChunk, ok));
4500 static int yaffs_WriteCheckpointObjects(yaffs_Device *dev)
4503 yaffs_CheckpointObject cp;
4506 struct ylist_head *lh;
4509 /* Iterate through the objects in each hash entry,
4510 * dumping them to the checkpointing stream.
4513 for (i = 0; ok && i < YAFFS_NOBJECT_BUCKETS; i++) {
4514 ylist_for_each(lh, &dev->objectBucket[i].list) {
4516 obj = ylist_entry(lh, yaffs_Object, hashLink);
4517 if (!obj->deferedFree) {
4518 yaffs_ObjectToCheckpointObject(&cp, obj);
4519 cp.structType = sizeof(cp);
4521 T(YAFFS_TRACE_CHECKPOINT, (
4522 TSTR("Checkpoint write object %d parent %d type %d chunk %d obj addr %p" TENDSTR),
4523 cp.objectId, cp.parentId, cp.variantType, cp.hdrChunk, obj));
4525 ok = (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp));
4527 if (ok && obj->variantType == YAFFS_OBJECT_TYPE_FILE)
4528 ok = yaffs_WriteCheckpointTnodes(obj);
4534 /* Dump end of list */
4535 memset(&cp, 0xFF, sizeof(yaffs_CheckpointObject));
4536 cp.structType = sizeof(cp);
4539 ok = (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp));
4544 static int yaffs_ReadCheckpointObjects(yaffs_Device *dev)
4547 yaffs_CheckpointObject cp;
4550 yaffs_Object *hardList = NULL;
4552 while (ok && !done) {
4553 ok = (yaffs_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp));
4554 if (cp.structType != sizeof(cp)) {
4555 T(YAFFS_TRACE_CHECKPOINT, (TSTR("struct size %d instead of %d ok %d"TENDSTR),
4556 cp.structType, (int)sizeof(cp), ok));
4560 T(YAFFS_TRACE_CHECKPOINT, (TSTR("Checkpoint read object %d parent %d type %d chunk %d " TENDSTR),
4561 cp.objectId, cp.parentId, cp.variantType, cp.hdrChunk));
4563 if (ok && cp.objectId == ~0)
4566 obj = yaffs_FindOrCreateObjectByNumber(dev, cp.objectId, cp.variantType);
4568 ok = yaffs_CheckpointObjectToObject(obj, &cp);
4571 if (obj->variantType == YAFFS_OBJECT_TYPE_FILE) {
4572 ok = yaffs_ReadCheckpointTnodes(obj);
4573 } else if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) {
4574 obj->hardLinks.next =
4575 (struct ylist_head *) hardList;
4584 yaffs_HardlinkFixup(dev, hardList);
4589 static int yaffs_WriteCheckpointSum(yaffs_Device *dev)
4591 __u32 checkpointSum;
4594 yaffs_GetCheckpointSum(dev, &checkpointSum);
4596 ok = (yaffs_CheckpointWrite(dev, &checkpointSum, sizeof(checkpointSum)) == sizeof(checkpointSum));
4604 static int yaffs_ReadCheckpointSum(yaffs_Device *dev)
4606 __u32 checkpointSum0;
4607 __u32 checkpointSum1;
4610 yaffs_GetCheckpointSum(dev, &checkpointSum0);
4612 ok = (yaffs_CheckpointRead(dev, &checkpointSum1, sizeof(checkpointSum1)) == sizeof(checkpointSum1));
4617 if (checkpointSum0 != checkpointSum1)
4624 static int yaffs_WriteCheckpointData(yaffs_Device *dev)
4628 if (dev->skipCheckpointWrite || !dev->isYaffs2) {
4629 T(YAFFS_TRACE_CHECKPOINT, (TSTR("skipping checkpoint write" TENDSTR)));
4634 ok = yaffs_CheckpointOpen(dev, 1);
4637 T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint validity" TENDSTR)));
4638 ok = yaffs_WriteCheckpointValidityMarker(dev, 1);
4641 T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint device" TENDSTR)));
4642 ok = yaffs_WriteCheckpointDevice(dev);
4645 T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint objects" TENDSTR)));
4646 ok = yaffs_WriteCheckpointObjects(dev);
4649 T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint validity" TENDSTR)));
4650 ok = yaffs_WriteCheckpointValidityMarker(dev, 0);
4654 ok = yaffs_WriteCheckpointSum(dev);
4656 if (!yaffs_CheckpointClose(dev))
4660 dev->isCheckpointed = 1;
4662 dev->isCheckpointed = 0;
4664 return dev->isCheckpointed;
4667 static int yaffs_ReadCheckpointData(yaffs_Device *dev)
4671 if (dev->skipCheckpointRead || !dev->isYaffs2) {
4672 T(YAFFS_TRACE_CHECKPOINT, (TSTR("skipping checkpoint read" TENDSTR)));
4677 ok = yaffs_CheckpointOpen(dev, 0); /* open for read */
4680 T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint validity" TENDSTR)));
4681 ok = yaffs_ReadCheckpointValidityMarker(dev, 1);
4684 T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint device" TENDSTR)));
4685 ok = yaffs_ReadCheckpointDevice(dev);
4688 T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint objects" TENDSTR)));
4689 ok = yaffs_ReadCheckpointObjects(dev);
4692 T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint validity" TENDSTR)));
4693 ok = yaffs_ReadCheckpointValidityMarker(dev, 0);
4697 ok = yaffs_ReadCheckpointSum(dev);
4698 T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint checksum %d" TENDSTR), ok));
4701 if (!yaffs_CheckpointClose(dev))
4705 dev->isCheckpointed = 1;
4707 dev->isCheckpointed = 0;
4713 static void yaffs_InvalidateCheckpoint(yaffs_Device *dev)
4715 if (dev->isCheckpointed ||
4716 dev->blocksInCheckpoint > 0) {
4717 dev->isCheckpointed = 0;
4718 yaffs_CheckpointInvalidateStream(dev);
4719 if (dev->superBlock && dev->markSuperBlockDirty)
4720 dev->markSuperBlockDirty(dev->superBlock);
4725 int yaffs_CheckpointSave(yaffs_Device *dev)
4728 T(YAFFS_TRACE_CHECKPOINT, (TSTR("save entry: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
4730 yaffs_VerifyObjects(dev);
4731 yaffs_VerifyBlocks(dev);
4732 yaffs_VerifyFreeChunks(dev);
4734 if (!dev->isCheckpointed) {
4735 yaffs_InvalidateCheckpoint(dev);
4736 yaffs_WriteCheckpointData(dev);
4739 T(YAFFS_TRACE_ALWAYS, (TSTR("save exit: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
4741 return dev->isCheckpointed;
4744 int yaffs_CheckpointRestore(yaffs_Device *dev)
4747 T(YAFFS_TRACE_CHECKPOINT, (TSTR("restore entry: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
4749 retval = yaffs_ReadCheckpointData(dev);
4751 if (dev->isCheckpointed) {
4752 yaffs_VerifyObjects(dev);
4753 yaffs_VerifyBlocks(dev);
4754 yaffs_VerifyFreeChunks(dev);
4757 T(YAFFS_TRACE_CHECKPOINT, (TSTR("restore exit: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
4762 /*--------------------- File read/write ------------------------
4763 * Read and write have very similar structures.
4764 * In general the read/write has three parts to it
4765 * An incomplete chunk to start with (if the read/write is not chunk-aligned)
4766 * Some complete chunks
4767 * An incomplete chunk to end off with
4769 * Curve-balls: the first chunk might also be the last chunk.
4772 int yaffs_ReadDataFromFile(yaffs_Object *in, __u8 *buffer, loff_t offset,
4781 yaffs_ChunkCache *cache;
4788 /* chunk = offset / dev->nDataBytesPerChunk + 1; */
4789 /* start = offset % dev->nDataBytesPerChunk; */
4790 yaffs_AddrToChunk(dev, offset, &chunk, &start);
4793 /* OK now check for the curveball where the start and end are in
4796 if ((start + n) < dev->nDataBytesPerChunk)
4799 nToCopy = dev->nDataBytesPerChunk - start;
4801 cache = yaffs_FindChunkCache(in, chunk);
4803 /* If the chunk is already in the cache or it is less than a whole chunk
4804 * or we're using inband tags then use the cache (if there is caching)
4805 * else bypass the cache.
4807 if (cache || nToCopy != dev->nDataBytesPerChunk || dev->inbandTags) {
4808 if (dev->nShortOpCaches > 0) {
4810 /* If we can't find the data in the cache, then load it up. */
4813 cache = yaffs_GrabChunkCache(in->myDev);
4815 cache->chunkId = chunk;
4818 yaffs_ReadChunkDataFromObject(in, chunk,
4824 yaffs_UseChunkCache(dev, cache, 0);
4829 memcpy(buffer, &cache->data[start], nToCopy);
4833 /* Read into the local buffer then copy..*/
4836 yaffs_GetTempBuffer(dev, __LINE__);
4837 yaffs_ReadChunkDataFromObject(in, chunk,
4840 memcpy(buffer, &localBuffer[start], nToCopy);
4843 yaffs_ReleaseTempBuffer(dev, localBuffer,
4849 /* A full chunk. Read directly into the supplied buffer. */
4850 yaffs_ReadChunkDataFromObject(in, chunk, buffer);
4864 int yaffs_WriteDataToFile(yaffs_Object *in, const __u8 *buffer, loff_t offset,
4865 int nBytes, int writeThrough)
4874 int startOfWrite = offset;
4875 int chunkWritten = 0;
4883 while (n > 0 && chunkWritten >= 0) {
4884 /* chunk = offset / dev->nDataBytesPerChunk + 1; */
4885 /* start = offset % dev->nDataBytesPerChunk; */
4886 yaffs_AddrToChunk(dev, offset, &chunk, &start);
4888 if (chunk * dev->nDataBytesPerChunk + start != offset ||
4889 start >= dev->nDataBytesPerChunk) {
4890 T(YAFFS_TRACE_ERROR, (
4891 TSTR("AddrToChunk of offset %d gives chunk %d start %d"
4893 (int)offset, chunk, start));
4897 /* OK now check for the curveball where the start and end are in
4901 if ((start + n) < dev->nDataBytesPerChunk) {
4904 /* Now folks, to calculate how many bytes to write back....
4905 * If we're overwriting and not writing to then end of file then
4906 * we need to write back as much as was there before.
4909 chunkStart = ((chunk - 1) * dev->nDataBytesPerChunk);
4911 if (chunkStart > in->variant.fileVariant.fileSize)
4912 nBytesRead = 0; /* Past end of file */
4914 nBytesRead = in->variant.fileVariant.fileSize - chunkStart;
4916 if (nBytesRead > dev->nDataBytesPerChunk)
4917 nBytesRead = dev->nDataBytesPerChunk;
4921 (start + n)) ? nBytesRead : (start + n);
4923 if (nToWriteBack < 0 || nToWriteBack > dev->nDataBytesPerChunk)
4927 nToCopy = dev->nDataBytesPerChunk - start;
4928 nToWriteBack = dev->nDataBytesPerChunk;
4931 if (nToCopy != dev->nDataBytesPerChunk || dev->inbandTags) {
4932 /* An incomplete start or end chunk (or maybe both start and end chunk),
4933 * or we're using inband tags, so we want to use the cache buffers.
4935 if (dev->nShortOpCaches > 0) {
4936 yaffs_ChunkCache *cache;
4937 /* If we can't find the data in the cache, then load the cache */
4938 cache = yaffs_FindChunkCache(in, chunk);
4941 && yaffs_CheckSpaceForAllocation(in->
4943 cache = yaffs_GrabChunkCache(in->myDev);
4945 cache->chunkId = chunk;
4948 yaffs_ReadChunkDataFromObject(in, chunk,
4953 !yaffs_CheckSpaceForAllocation(in->myDev)) {
4954 /* Drop the cache if it was a read cache item and
4955 * no space check has been made for it.
4961 yaffs_UseChunkCache(dev, cache, 1);
4965 memcpy(&cache->data[start], buffer,
4970 cache->nBytes = nToWriteBack;
4974 yaffs_WriteChunkDataToObject
4977 cache->data, cache->nBytes,
4983 chunkWritten = -1; /* fail the write */
4986 /* An incomplete start or end chunk (or maybe both start and end chunk)
4987 * Read into the local buffer then copy, then copy over and write back.
4991 yaffs_GetTempBuffer(dev, __LINE__);
4993 yaffs_ReadChunkDataFromObject(in, chunk,
4998 memcpy(&localBuffer[start], buffer, nToCopy);
5001 yaffs_WriteChunkDataToObject(in, chunk,
5006 yaffs_ReleaseTempBuffer(dev, localBuffer,
5012 /* A full chunk. Write directly from the supplied buffer. */
5017 yaffs_WriteChunkDataToObject(in, chunk, buffer,
5018 dev->nDataBytesPerChunk,
5021 /* Since we've overwritten the cached data, we better invalidate it. */
5022 yaffs_InvalidateChunkCache(in, chunk);
5025 if (chunkWritten >= 0) {
5034 /* Update file object */
5036 if ((startOfWrite + nDone) > in->variant.fileVariant.fileSize)
5037 in->variant.fileVariant.fileSize = (startOfWrite + nDone);
5045 /* ---------------------- File resizing stuff ------------------ */
5047 static void yaffs_PruneResizedChunks(yaffs_Object *in, int newSize)
5050 yaffs_Device *dev = in->myDev;
5051 int oldFileSize = in->variant.fileVariant.fileSize;
5053 int lastDel = 1 + (oldFileSize - 1) / dev->nDataBytesPerChunk;
5055 int startDel = 1 + (newSize + dev->nDataBytesPerChunk - 1) /
5056 dev->nDataBytesPerChunk;
5060 /* Delete backwards so that we don't end up with holes if
5061 * power is lost part-way through the operation.
5063 for (i = lastDel; i >= startDel; i--) {
5064 /* NB this could be optimised somewhat,
5065 * eg. could retrieve the tags and write them without
5066 * using yaffs_DeleteChunk
5069 chunkId = yaffs_FindAndDeleteChunkInFile(in, i, NULL);
5072 (dev->internalStartBlock * dev->nChunksPerBlock)
5074 ((dev->internalEndBlock +
5075 1) * dev->nChunksPerBlock)) {
5076 T(YAFFS_TRACE_ALWAYS,
5077 (TSTR("Found daft chunkId %d for %d" TENDSTR),
5081 yaffs_DeleteChunk(dev, chunkId, 1, __LINE__);
5088 int yaffs_ResizeFile(yaffs_Object *in, loff_t newSize)
5091 int oldFileSize = in->variant.fileVariant.fileSize;
5092 __u32 newSizeOfPartialChunk;
5095 yaffs_Device *dev = in->myDev;
5097 yaffs_AddrToChunk(dev, newSize, &newFullChunks, &newSizeOfPartialChunk);
5099 yaffs_FlushFilesChunkCache(in);
5100 yaffs_InvalidateWholeChunkCache(in);
5102 yaffs_CheckGarbageCollection(dev);
5104 if (in->variantType != YAFFS_OBJECT_TYPE_FILE)
5107 if (newSize == oldFileSize)
5110 if (newSize < oldFileSize) {
5112 yaffs_PruneResizedChunks(in, newSize);
5114 if (newSizeOfPartialChunk != 0) {
5115 int lastChunk = 1 + newFullChunks;
5117 __u8 *localBuffer = yaffs_GetTempBuffer(dev, __LINE__);
5119 /* Got to read and rewrite the last chunk with its new size and zero pad */
5120 yaffs_ReadChunkDataFromObject(in, lastChunk,
5123 memset(localBuffer + newSizeOfPartialChunk, 0,
5124 dev->nDataBytesPerChunk - newSizeOfPartialChunk);
5126 yaffs_WriteChunkDataToObject(in, lastChunk, localBuffer,
5127 newSizeOfPartialChunk, 1);
5129 yaffs_ReleaseTempBuffer(dev, localBuffer, __LINE__);
5132 in->variant.fileVariant.fileSize = newSize;
5134 yaffs_PruneFileStructure(dev, &in->variant.fileVariant);
5136 /* newsSize > oldFileSize */
5137 in->variant.fileVariant.fileSize = newSize;
5141 /* Write a new object header to reflect the resize.
5142 * show we've shrunk the file, if need be
5143 * Do this only if the file is not in the deleted directories
5144 * and is not shadowed.
5148 in->parent->objectId != YAFFS_OBJECTID_UNLINKED &&
5149 in->parent->objectId != YAFFS_OBJECTID_DELETED)
5150 yaffs_UpdateObjectHeader(in, NULL, 0,
5151 (newSize < oldFileSize) ? 1 : 0, 0);
5156 loff_t yaffs_GetFileSize(yaffs_Object *obj)
5158 YCHAR *alias = NULL;
5159 obj = yaffs_GetEquivalentObject(obj);
5161 switch (obj->variantType) {
5162 case YAFFS_OBJECT_TYPE_FILE:
5163 return obj->variant.fileVariant.fileSize;
5164 case YAFFS_OBJECT_TYPE_SYMLINK:
5165 alias = obj->variant.symLinkVariant.alias;
5168 return yaffs_strnlen(alias,YAFFS_MAX_ALIAS_LENGTH);
5176 int yaffs_FlushFile(yaffs_Object *in, int updateTime, int dataSync)
5180 yaffs_FlushFilesChunkCache(in);
5181 if(dataSync) /* Only sync data */
5185 #ifdef CONFIG_YAFFS_WINCE
5186 yfsd_WinFileTimeNow(in->win_mtime);
5189 in->yst_mtime = Y_CURRENT_TIME;
5194 retVal = (yaffs_UpdateObjectHeader(in, NULL, 0, 0, 0) >=
5195 0) ? YAFFS_OK : YAFFS_FAIL;
5205 static int yaffs_DoGenericObjectDeletion(yaffs_Object *in)
5208 /* First off, invalidate the file's data in the cache, without flushing. */
5209 yaffs_InvalidateWholeChunkCache(in);
5211 if (in->myDev->isYaffs2 && (in->parent != in->myDev->deletedDir)) {
5212 /* Move to the unlinked directory so we have a record that it was deleted. */
5213 yaffs_ChangeObjectName(in, in->myDev->deletedDir, _Y("deleted"), 0, 0);
5217 yaffs_RemoveObjectFromDirectory(in);
5218 yaffs_DeleteChunk(in->myDev, in->hdrChunk, 1, __LINE__);
5221 yaffs_FreeObject(in);
5226 /* yaffs_DeleteFile deletes the whole file data
5227 * and the inode associated with the file.
5228 * It does not delete the links associated with the file.
5230 static int yaffs_UnlinkFileIfNeeded(yaffs_Object *in)
5234 int immediateDeletion = 0;
5238 immediateDeletion = 1;
5241 immediateDeletion = 1;
5244 if (immediateDeletion) {
5246 yaffs_ChangeObjectName(in, in->myDev->deletedDir,
5247 _Y("deleted"), 0, 0);
5248 T(YAFFS_TRACE_TRACING,
5249 (TSTR("yaffs: immediate deletion of file %d" TENDSTR),
5252 in->myDev->nDeletedFiles++;
5253 if (1 || in->myDev->isYaffs2)
5254 yaffs_ResizeFile(in, 0);
5255 yaffs_SoftDeleteFile(in);
5258 yaffs_ChangeObjectName(in, in->myDev->unlinkedDir,
5259 _Y("unlinked"), 0, 0);
5266 int yaffs_DeleteFile(yaffs_Object *in)
5268 int retVal = YAFFS_OK;
5269 int deleted = in->deleted;
5271 yaffs_ResizeFile(in, 0);
5273 if (in->nDataChunks > 0) {
5274 /* Use soft deletion if there is data in the file.
5275 * That won't be the case if it has been resized to zero.
5278 retVal = yaffs_UnlinkFileIfNeeded(in);
5280 if (retVal == YAFFS_OK && in->unlinked && !in->deleted) {
5283 in->myDev->nDeletedFiles++;
5284 yaffs_SoftDeleteFile(in);
5286 return deleted ? YAFFS_OK : YAFFS_FAIL;
5288 /* The file has no data chunks so we toss it immediately */
5289 yaffs_FreeTnode(in->myDev, in->variant.fileVariant.top);
5290 in->variant.fileVariant.top = NULL;
5291 yaffs_DoGenericObjectDeletion(in);
5297 static int yaffs_IsNonEmptyDirectory(yaffs_Object *obj)
5299 return (obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) &&
5300 !(ylist_empty(&obj->variant.directoryVariant.children));
5303 static int yaffs_DeleteDirectory(yaffs_Object *obj)
5305 /* First check that the directory is empty. */
5306 if (yaffs_IsNonEmptyDirectory(obj))
5309 return yaffs_DoGenericObjectDeletion(obj);
5312 static int yaffs_DeleteSymLink(yaffs_Object *in)
5314 if(in->variant.symLinkVariant.alias)
5315 YFREE(in->variant.symLinkVariant.alias);
5316 in->variant.symLinkVariant.alias=NULL;
5318 return yaffs_DoGenericObjectDeletion(in);
5321 static int yaffs_DeleteHardLink(yaffs_Object *in)
5323 /* remove this hardlink from the list assocaited with the equivalent
5326 ylist_del_init(&in->hardLinks);
5327 return yaffs_DoGenericObjectDeletion(in);
5330 int yaffs_DeleteObject(yaffs_Object *obj)
5333 switch (obj->variantType) {
5334 case YAFFS_OBJECT_TYPE_FILE:
5335 retVal = yaffs_DeleteFile(obj);
5337 case YAFFS_OBJECT_TYPE_DIRECTORY:
5338 return yaffs_DeleteDirectory(obj);
5340 case YAFFS_OBJECT_TYPE_SYMLINK:
5341 retVal = yaffs_DeleteSymLink(obj);
5343 case YAFFS_OBJECT_TYPE_HARDLINK:
5344 retVal = yaffs_DeleteHardLink(obj);
5346 case YAFFS_OBJECT_TYPE_SPECIAL:
5347 retVal = yaffs_DoGenericObjectDeletion(obj);
5349 case YAFFS_OBJECT_TYPE_UNKNOWN:
5351 break; /* should not happen. */
5357 static int yaffs_UnlinkWorker(yaffs_Object *obj)
5360 int immediateDeletion = 0;
5364 immediateDeletion = 1;
5366 if (obj->inUse <= 0)
5367 immediateDeletion = 1;
5371 yaffs_UpdateParent(obj->parent);
5373 if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) {
5374 return yaffs_DeleteHardLink(obj);
5375 } else if (!ylist_empty(&obj->hardLinks)) {
5376 /* Curve ball: We're unlinking an object that has a hardlink.
5378 * This problem arises because we are not strictly following
5379 * The Linux link/inode model.
5381 * We can't really delete the object.
5382 * Instead, we do the following:
5383 * - Select a hardlink.
5384 * - Unhook it from the hard links
5385 * - Unhook it from its parent directory (so that the rename can work)
5386 * - Rename the object to the hardlink's name.
5387 * - Delete the hardlink
5392 YCHAR name[YAFFS_MAX_NAME_LENGTH + 1];
5394 hl = ylist_entry(obj->hardLinks.next, yaffs_Object, hardLinks);
5396 ylist_del_init(&hl->hardLinks);
5397 ylist_del_init(&hl->siblings);
5399 yaffs_GetObjectName(hl, name, YAFFS_MAX_NAME_LENGTH + 1);
5401 retVal = yaffs_ChangeObjectName(obj, hl->parent, name, 0, 0);
5403 if (retVal == YAFFS_OK)
5404 retVal = yaffs_DoGenericObjectDeletion(hl);
5408 } else if (immediateDeletion) {
5409 switch (obj->variantType) {
5410 case YAFFS_OBJECT_TYPE_FILE:
5411 return yaffs_DeleteFile(obj);
5413 case YAFFS_OBJECT_TYPE_DIRECTORY:
5414 return yaffs_DeleteDirectory(obj);
5416 case YAFFS_OBJECT_TYPE_SYMLINK:
5417 return yaffs_DeleteSymLink(obj);
5419 case YAFFS_OBJECT_TYPE_SPECIAL:
5420 return yaffs_DoGenericObjectDeletion(obj);
5422 case YAFFS_OBJECT_TYPE_HARDLINK:
5423 case YAFFS_OBJECT_TYPE_UNKNOWN:
5427 } else if(yaffs_IsNonEmptyDirectory(obj))
5430 return yaffs_ChangeObjectName(obj, obj->myDev->unlinkedDir,
5431 _Y("unlinked"), 0, 0);
5435 static int yaffs_UnlinkObject(yaffs_Object *obj)
5438 if (obj && obj->unlinkAllowed)
5439 return yaffs_UnlinkWorker(obj);
5444 int yaffs_Unlink(yaffs_Object *dir, const YCHAR *name)
5448 obj = yaffs_FindObjectByName(dir, name);
5449 return yaffs_UnlinkObject(obj);
5452 /*----------------------- Initialisation Scanning ---------------------- */
5454 static void yaffs_HandleShadowedObject(yaffs_Device *dev, int objId,
5455 int backwardScanning)
5459 if (!backwardScanning) {
5460 /* Handle YAFFS1 forward scanning case
5461 * For YAFFS1 we always do the deletion
5465 /* Handle YAFFS2 case (backward scanning)
5466 * If the shadowed object exists then ignore.
5468 obj = yaffs_FindObjectByNumber(dev, objId);
5473 /* Let's create it (if it does not exist) assuming it is a file so that it can do shrinking etc.
5474 * We put it in unlinked dir to be cleaned up after the scanning
5477 yaffs_FindOrCreateObjectByNumber(dev, objId,
5478 YAFFS_OBJECT_TYPE_FILE);
5481 obj->isShadowed = 1;
5482 yaffs_AddObjectToDirectory(dev->unlinkedDir, obj);
5483 obj->variant.fileVariant.shrinkSize = 0;
5484 obj->valid = 1; /* So that we don't read any other info for this file */
5494 static void yaffs_HardlinkFixup(yaffs_Device *dev, yaffs_Object *hardList)
5501 hardList = (yaffs_Object *) (hardList->hardLinks.next);
5503 in = yaffs_FindObjectByNumber(dev,
5504 hl->variant.hardLinkVariant.
5505 equivalentObjectId);
5508 /* Add the hardlink pointers */
5509 hl->variant.hardLinkVariant.equivalentObject = in;
5510 ylist_add(&hl->hardLinks, &in->hardLinks);
5512 /* Todo Need to report/handle this better.
5513 * Got a problem... hardlink to a non-existant object
5515 hl->variant.hardLinkVariant.equivalentObject = NULL;
5516 YINIT_LIST_HEAD(&hl->hardLinks);
5526 static int ybicmp(const void *a, const void *b)
5528 register int aseq = ((yaffs_BlockIndex *)a)->seq;
5529 register int bseq = ((yaffs_BlockIndex *)b)->seq;
5530 register int ablock = ((yaffs_BlockIndex *)a)->block;
5531 register int bblock = ((yaffs_BlockIndex *)b)->block;
5533 return ablock - bblock;
5539 struct yaffs_ShadowFixerStruct {
5542 struct yaffs_ShadowFixerStruct *next;
5546 static void yaffs_StripDeletedObjects(yaffs_Device *dev)
5549 * Sort out state of unlinked and deleted objects after scanning.
5551 struct ylist_head *i;
5552 struct ylist_head *n;
5555 /* Soft delete all the unlinked files */
5556 ylist_for_each_safe(i, n,
5557 &dev->unlinkedDir->variant.directoryVariant.children) {
5559 l = ylist_entry(i, yaffs_Object, siblings);
5560 yaffs_DeleteObject(l);
5564 ylist_for_each_safe(i, n,
5565 &dev->deletedDir->variant.directoryVariant.children) {
5567 l = ylist_entry(i, yaffs_Object, siblings);
5568 yaffs_DeleteObject(l);
5575 * This code iterates through all the objects making sure that they are rooted.
5576 * Any unrooted objects are re-rooted in lost+found.
5577 * An object needs to be in one of:
5578 * - Directly under deleted, unlinked
5579 * - Directly or indirectly under root.
5582 * This code assumes that we don't ever change the current relationships between
5584 * rootDir->parent == unlinkedDir->parent == deletedDir->parent == NULL
5585 * lostNfound->parent == rootDir
5587 * This fixes the problem where directories might have inadvertently been deleted
5588 * leaving the object "hanging" without being rooted in the directory tree.
5591 static int yaffs_HasNULLParent(yaffs_Device *dev, yaffs_Object *obj)
5593 return (obj == dev->deletedDir ||
5594 obj == dev->unlinkedDir||
5595 obj == dev->rootDir);
5598 static void yaffs_FixHangingObjects(yaffs_Device *dev)
5601 yaffs_Object *parent;
5603 struct ylist_head *lh;
5604 struct ylist_head *n;
5609 /* Iterate through the objects in each hash entry,
5610 * looking at each object.
5611 * Make sure it is rooted.
5614 for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
5615 ylist_for_each_safe(lh, n, &dev->objectBucket[i].list) {
5617 obj = ylist_entry(lh, yaffs_Object, hashLink);
5618 parent= obj->parent;
5620 if(yaffs_HasNULLParent(dev,obj)){
5621 /* These directories are not hanging */
5624 else if(!parent || parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
5626 else if(yaffs_HasNULLParent(dev,parent))
5630 * Need to follow the parent chain to see if it is hanging.
5635 while(parent != dev->rootDir &&
5637 parent->parent->variantType == YAFFS_OBJECT_TYPE_DIRECTORY &&
5639 parent = parent->parent;
5642 if(parent != dev->rootDir)
5647 (TSTR("Hanging object %d moved to lost and found" TENDSTR),
5649 yaffs_AddObjectToDirectory(dev->lostNFoundDir,obj);
5658 * Delete directory contents for cleaning up lost and found.
5660 static void yaffs_DeleteDirectoryContents(yaffs_Object *dir)
5663 struct ylist_head *lh;
5664 struct ylist_head *n;
5666 if(dir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
5669 ylist_for_each_safe(lh, n, &dir->variant.directoryVariant.children) {
5671 obj = ylist_entry(lh, yaffs_Object, siblings);
5672 if(obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY)
5673 yaffs_DeleteDirectoryContents(obj);
5676 (TSTR("Deleting lost_found object %d" TENDSTR),
5679 /* Need to use UnlinkObject since Delete would not handle
5680 * hardlinked objects correctly.
5682 yaffs_UnlinkObject(obj);
5688 static void yaffs_EmptyLostAndFound(yaffs_Device *dev)
5690 yaffs_DeleteDirectoryContents(dev->lostNFoundDir);
5693 static int yaffs_Scan(yaffs_Device *dev)
5695 yaffs_ExtendedTags tags;
5705 yaffs_BlockState state;
5706 yaffs_Object *hardList = NULL;
5707 yaffs_BlockInfo *bi;
5708 __u32 sequenceNumber;
5709 yaffs_ObjectHeader *oh;
5711 yaffs_Object *parent;
5713 int alloc_failed = 0;
5715 struct yaffs_ShadowFixerStruct *shadowFixerList = NULL;
5723 (TSTR("yaffs_Scan starts intstartblk %d intendblk %d..." TENDSTR),
5724 dev->internalStartBlock, dev->internalEndBlock));
5726 chunkData = yaffs_GetTempBuffer(dev, __LINE__);
5728 dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER;
5730 /* Scan all the blocks to determine their state */
5731 for (blk = dev->internalStartBlock; blk <= dev->internalEndBlock; blk++) {
5732 bi = yaffs_GetBlockInfo(dev, blk);
5733 yaffs_ClearChunkBits(dev, blk);
5735 bi->softDeletions = 0;
5737 yaffs_QueryInitialBlockState(dev, blk, &state, &sequenceNumber);
5739 bi->blockState = state;
5740 bi->sequenceNumber = sequenceNumber;
5742 if (bi->sequenceNumber == YAFFS_SEQUENCE_BAD_BLOCK)
5743 bi->blockState = state = YAFFS_BLOCK_STATE_DEAD;
5745 T(YAFFS_TRACE_SCAN_DEBUG,
5746 (TSTR("Block scanning block %d state %d seq %d" TENDSTR), blk,
5747 state, sequenceNumber));
5749 if (state == YAFFS_BLOCK_STATE_DEAD) {
5750 T(YAFFS_TRACE_BAD_BLOCKS,
5751 (TSTR("block %d is bad" TENDSTR), blk));
5752 } else if (state == YAFFS_BLOCK_STATE_EMPTY) {
5753 T(YAFFS_TRACE_SCAN_DEBUG,
5754 (TSTR("Block empty " TENDSTR)));
5755 dev->nErasedBlocks++;
5756 dev->nFreeChunks += dev->nChunksPerBlock;
5760 startIterator = dev->internalStartBlock;
5761 endIterator = dev->internalEndBlock;
5763 /* For each block.... */
5764 for (blockIterator = startIterator; !alloc_failed && blockIterator <= endIterator;
5771 blk = blockIterator;
5773 bi = yaffs_GetBlockInfo(dev, blk);
5774 state = bi->blockState;
5778 /* For each chunk in each block that needs scanning....*/
5779 for (c = 0; !alloc_failed && c < dev->nChunksPerBlock &&
5780 state == YAFFS_BLOCK_STATE_NEEDS_SCANNING; c++) {
5781 /* Read the tags and decide what to do */
5782 chunk = blk * dev->nChunksPerBlock + c;
5784 result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk, NULL,
5787 /* Let's have a good look at this chunk... */
5789 if (tags.eccResult == YAFFS_ECC_RESULT_UNFIXED || tags.chunkDeleted) {
5795 /*T((" %d %d deleted\n",blk,c)); */
5796 } else if (!tags.chunkUsed) {
5797 /* An unassigned chunk in the block
5798 * This means that either the block is empty or
5799 * this is the one being allocated from
5803 /* We're looking at the first chunk in the block so the block is unused */
5804 state = YAFFS_BLOCK_STATE_EMPTY;
5805 dev->nErasedBlocks++;
5807 /* this is the block being allocated from */
5810 (" Allocating from %d %d" TENDSTR),
5812 state = YAFFS_BLOCK_STATE_ALLOCATING;
5813 dev->allocationBlock = blk;
5814 dev->allocationPage = c;
5815 dev->allocationBlockFinder = blk;
5816 /* Set block finder here to encourage the allocator to go forth from here. */
5820 dev->nFreeChunks += (dev->nChunksPerBlock - c);
5821 } else if (tags.chunkId > 0) {
5822 /* chunkId > 0 so it is a data chunk... */
5823 unsigned int endpos;
5825 yaffs_SetChunkBit(dev, blk, c);
5828 in = yaffs_FindOrCreateObjectByNumber(dev,
5831 YAFFS_OBJECT_TYPE_FILE);
5832 /* PutChunkIntoFile checks for a clash (two data chunks with
5833 * the same chunkId).
5840 if (!yaffs_PutChunkIntoFile(in, tags.chunkId, chunk, 1))
5845 (tags.chunkId - 1) * dev->nDataBytesPerChunk +
5848 in->variantType == YAFFS_OBJECT_TYPE_FILE
5849 && in->variant.fileVariant.scannedFileSize <
5851 in->variant.fileVariant.
5852 scannedFileSize = endpos;
5853 if (!dev->useHeaderFileSize) {
5854 in->variant.fileVariant.
5856 in->variant.fileVariant.
5861 /* T((" %d %d data %d %d\n",blk,c,tags.objectId,tags.chunkId)); */
5863 /* chunkId == 0, so it is an ObjectHeader.
5864 * Thus, we read in the object header and make the object
5866 yaffs_SetChunkBit(dev, blk, c);
5869 result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk,
5873 oh = (yaffs_ObjectHeader *) chunkData;
5875 in = yaffs_FindObjectByNumber(dev,
5877 if (in && in->variantType != oh->type) {
5878 /* This should not happen, but somehow
5879 * Wev'e ended up with an objectId that has been reused but not yet
5880 * deleted, and worse still it has changed type. Delete the old object.
5883 yaffs_DeleteObject(in);
5888 in = yaffs_FindOrCreateObjectByNumber(dev,
5896 if (in && oh->shadowsObject > 0) {
5898 struct yaffs_ShadowFixerStruct *fixer;
5899 fixer = YMALLOC(sizeof(struct yaffs_ShadowFixerStruct));
5901 fixer->next = shadowFixerList;
5902 shadowFixerList = fixer;
5903 fixer->objectId = tags.objectId;
5904 fixer->shadowedId = oh->shadowsObject;
5909 if (in && in->valid) {
5910 /* We have already filled this one. We have a duplicate and need to resolve it. */
5912 unsigned existingSerial = in->serial;
5913 unsigned newSerial = tags.serialNumber;
5915 if (((existingSerial + 1) & 3) == newSerial) {
5916 /* Use new one - destroy the exisiting one */
5917 yaffs_DeleteChunk(dev,
5922 /* Use existing - destroy this one. */
5923 yaffs_DeleteChunk(dev, chunk, 1,
5928 if (in && !in->valid &&
5929 (tags.objectId == YAFFS_OBJECTID_ROOT ||
5930 tags.objectId == YAFFS_OBJECTID_LOSTNFOUND)) {
5931 /* We only load some info, don't fiddle with directory structure */
5933 in->variantType = oh->type;
5935 in->yst_mode = oh->yst_mode;
5936 #ifdef CONFIG_YAFFS_WINCE
5937 in->win_atime[0] = oh->win_atime[0];
5938 in->win_ctime[0] = oh->win_ctime[0];
5939 in->win_mtime[0] = oh->win_mtime[0];
5940 in->win_atime[1] = oh->win_atime[1];
5941 in->win_ctime[1] = oh->win_ctime[1];
5942 in->win_mtime[1] = oh->win_mtime[1];
5944 in->yst_uid = oh->yst_uid;
5945 in->yst_gid = oh->yst_gid;
5946 in->yst_atime = oh->yst_atime;
5947 in->yst_mtime = oh->yst_mtime;
5948 in->yst_ctime = oh->yst_ctime;
5949 in->yst_rdev = oh->yst_rdev;
5951 in->hdrChunk = chunk;
5952 in->serial = tags.serialNumber;
5954 } else if (in && !in->valid) {
5955 /* we need to load this info */
5958 in->variantType = oh->type;
5960 in->yst_mode = oh->yst_mode;
5961 #ifdef CONFIG_YAFFS_WINCE
5962 in->win_atime[0] = oh->win_atime[0];
5963 in->win_ctime[0] = oh->win_ctime[0];
5964 in->win_mtime[0] = oh->win_mtime[0];
5965 in->win_atime[1] = oh->win_atime[1];
5966 in->win_ctime[1] = oh->win_ctime[1];
5967 in->win_mtime[1] = oh->win_mtime[1];
5969 in->yst_uid = oh->yst_uid;
5970 in->yst_gid = oh->yst_gid;
5971 in->yst_atime = oh->yst_atime;
5972 in->yst_mtime = oh->yst_mtime;
5973 in->yst_ctime = oh->yst_ctime;
5974 in->yst_rdev = oh->yst_rdev;
5976 in->hdrChunk = chunk;
5977 in->serial = tags.serialNumber;
5979 yaffs_SetObjectName(in, oh->name);
5982 /* directory stuff...
5987 yaffs_FindOrCreateObjectByNumber
5988 (dev, oh->parentObjectId,
5989 YAFFS_OBJECT_TYPE_DIRECTORY);
5992 if (parent && parent->variantType ==
5993 YAFFS_OBJECT_TYPE_UNKNOWN) {
5994 /* Set up as a directory */
5995 parent->variantType =
5996 YAFFS_OBJECT_TYPE_DIRECTORY;
5997 YINIT_LIST_HEAD(&parent->variant.
6000 } else if (!parent || parent->variantType !=
6001 YAFFS_OBJECT_TYPE_DIRECTORY) {
6002 /* Hoosterman, another problem....
6003 * We're trying to use a non-directory as a directory
6006 T(YAFFS_TRACE_ERROR,
6008 ("yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found."
6010 parent = dev->lostNFoundDir;
6013 yaffs_AddObjectToDirectory(parent, in);
6015 if (0 && (parent == dev->deletedDir ||
6016 parent == dev->unlinkedDir)) {
6017 in->deleted = 1; /* If it is unlinked at start up then it wants deleting */
6018 dev->nDeletedFiles++;
6020 /* Note re hardlinks.
6021 * Since we might scan a hardlink before its equivalent object is scanned
6022 * we put them all in a list.
6023 * After scanning is complete, we should have all the objects, so we run through this
6024 * list and fix up all the chains.
6027 switch (in->variantType) {
6028 case YAFFS_OBJECT_TYPE_UNKNOWN:
6029 /* Todo got a problem */
6031 case YAFFS_OBJECT_TYPE_FILE:
6032 if (dev->useHeaderFileSize)
6034 in->variant.fileVariant.
6039 case YAFFS_OBJECT_TYPE_HARDLINK:
6040 in->variant.hardLinkVariant.
6041 equivalentObjectId =
6042 oh->equivalentObjectId;
6043 in->hardLinks.next =
6044 (struct ylist_head *)
6048 case YAFFS_OBJECT_TYPE_DIRECTORY:
6051 case YAFFS_OBJECT_TYPE_SPECIAL:
6054 case YAFFS_OBJECT_TYPE_SYMLINK:
6055 in->variant.symLinkVariant.alias =
6056 yaffs_CloneString(oh->alias);
6057 if (!in->variant.symLinkVariant.alias)
6066 if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
6067 /* If we got this far while scanning, then the block is fully allocated.*/
6068 state = YAFFS_BLOCK_STATE_FULL;
6071 if (state == YAFFS_BLOCK_STATE_ALLOCATING) {
6072 /* If the block was partially allocated then treat it as fully allocated.*/
6073 state = YAFFS_BLOCK_STATE_FULL;
6074 dev->allocationBlock = -1;
6077 bi->blockState = state;
6079 /* Now let's see if it was dirty */
6080 if (bi->pagesInUse == 0 &&
6081 !bi->hasShrinkHeader &&
6082 bi->blockState == YAFFS_BLOCK_STATE_FULL) {
6083 yaffs_BlockBecameDirty(dev, blk);
6089 /* Ok, we've done all the scanning.
6090 * Fix up the hard link chains.
6091 * We should now have scanned all the objects, now it's time to add these
6095 yaffs_HardlinkFixup(dev, hardList);
6097 /* Fix up any shadowed objects */
6099 struct yaffs_ShadowFixerStruct *fixer;
6102 while (shadowFixerList) {
6103 fixer = shadowFixerList;
6104 shadowFixerList = fixer->next;
6105 /* Complete the rename transaction by deleting the shadowed object
6106 * then setting the object header to unshadowed.
6108 obj = yaffs_FindObjectByNumber(dev, fixer->shadowedId);
6110 yaffs_DeleteObject(obj);
6112 obj = yaffs_FindObjectByNumber(dev, fixer->objectId);
6115 yaffs_UpdateObjectHeader(obj, NULL, 1, 0, 0);
6121 yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
6126 T(YAFFS_TRACE_SCAN, (TSTR("yaffs_Scan ends" TENDSTR)));
6132 static void yaffs_CheckObjectDetailsLoaded(yaffs_Object *in)
6135 yaffs_ObjectHeader *oh;
6137 yaffs_ExtendedTags tags;
6139 int alloc_failed = 0;
6147 T(YAFFS_TRACE_SCAN, (TSTR("details for object %d %s loaded" TENDSTR),
6149 in->lazyLoaded ? "not yet" : "already"));
6152 if (in->lazyLoaded && in->hdrChunk > 0) {
6154 chunkData = yaffs_GetTempBuffer(dev, __LINE__);
6156 result = yaffs_ReadChunkWithTagsFromNAND(dev, in->hdrChunk, chunkData, &tags);
6157 oh = (yaffs_ObjectHeader *) chunkData;
6159 in->yst_mode = oh->yst_mode;
6160 #ifdef CONFIG_YAFFS_WINCE
6161 in->win_atime[0] = oh->win_atime[0];
6162 in->win_ctime[0] = oh->win_ctime[0];
6163 in->win_mtime[0] = oh->win_mtime[0];
6164 in->win_atime[1] = oh->win_atime[1];
6165 in->win_ctime[1] = oh->win_ctime[1];
6166 in->win_mtime[1] = oh->win_mtime[1];
6168 in->yst_uid = oh->yst_uid;
6169 in->yst_gid = oh->yst_gid;
6170 in->yst_atime = oh->yst_atime;
6171 in->yst_mtime = oh->yst_mtime;
6172 in->yst_ctime = oh->yst_ctime;
6173 in->yst_rdev = oh->yst_rdev;
6176 yaffs_SetObjectName(in, oh->name);
6178 if (in->variantType == YAFFS_OBJECT_TYPE_SYMLINK) {
6179 in->variant.symLinkVariant.alias =
6180 yaffs_CloneString(oh->alias);
6181 if (!in->variant.symLinkVariant.alias)
6182 alloc_failed = 1; /* Not returned to caller */
6185 yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
6189 static int yaffs_ScanBackwards(yaffs_Device *dev)
6191 yaffs_ExtendedTags tags;
6196 int nBlocksToScan = 0;
6202 yaffs_BlockState state;
6203 yaffs_Object *hardList = NULL;
6204 yaffs_BlockInfo *bi;
6205 __u32 sequenceNumber;
6206 yaffs_ObjectHeader *oh;
6208 yaffs_Object *parent;
6209 int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1;
6215 int foundChunksInBlock;
6216 int equivalentObjectId;
6217 int alloc_failed = 0;
6220 yaffs_BlockIndex *blockIndex = NULL;
6221 int altBlockIndex = 0;
6223 if (!dev->isYaffs2) {
6225 (TSTR("yaffs_ScanBackwards is only for YAFFS2!" TENDSTR)));
6231 ("yaffs_ScanBackwards starts intstartblk %d intendblk %d..."
6232 TENDSTR), dev->internalStartBlock, dev->internalEndBlock));
6235 dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER;
6237 blockIndex = YMALLOC(nBlocks * sizeof(yaffs_BlockIndex));
6240 blockIndex = YMALLOC_ALT(nBlocks * sizeof(yaffs_BlockIndex));
6246 (TSTR("yaffs_Scan() could not allocate block index!" TENDSTR)));
6250 dev->blocksInCheckpoint = 0;
6252 chunkData = yaffs_GetTempBuffer(dev, __LINE__);
6254 /* Scan all the blocks to determine their state */
6255 for (blk = dev->internalStartBlock; blk <= dev->internalEndBlock; blk++) {
6256 bi = yaffs_GetBlockInfo(dev, blk);
6257 yaffs_ClearChunkBits(dev, blk);
6259 bi->softDeletions = 0;
6261 yaffs_QueryInitialBlockState(dev, blk, &state, &sequenceNumber);
6263 bi->blockState = state;
6264 bi->sequenceNumber = sequenceNumber;
6266 if (bi->sequenceNumber == YAFFS_SEQUENCE_CHECKPOINT_DATA)
6267 bi->blockState = state = YAFFS_BLOCK_STATE_CHECKPOINT;
6268 if (bi->sequenceNumber == YAFFS_SEQUENCE_BAD_BLOCK)
6269 bi->blockState = state = YAFFS_BLOCK_STATE_DEAD;
6271 T(YAFFS_TRACE_SCAN_DEBUG,
6272 (TSTR("Block scanning block %d state %d seq %d" TENDSTR), blk,
6273 state, sequenceNumber));
6276 if (state == YAFFS_BLOCK_STATE_CHECKPOINT) {
6277 dev->blocksInCheckpoint++;
6279 } else if (state == YAFFS_BLOCK_STATE_DEAD) {
6280 T(YAFFS_TRACE_BAD_BLOCKS,
6281 (TSTR("block %d is bad" TENDSTR), blk));
6282 } else if (state == YAFFS_BLOCK_STATE_EMPTY) {
6283 T(YAFFS_TRACE_SCAN_DEBUG,
6284 (TSTR("Block empty " TENDSTR)));
6285 dev->nErasedBlocks++;
6286 dev->nFreeChunks += dev->nChunksPerBlock;
6287 } else if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
6289 /* Determine the highest sequence number */
6290 if (sequenceNumber >= YAFFS_LOWEST_SEQUENCE_NUMBER &&
6291 sequenceNumber < YAFFS_HIGHEST_SEQUENCE_NUMBER) {
6293 blockIndex[nBlocksToScan].seq = sequenceNumber;
6294 blockIndex[nBlocksToScan].block = blk;
6298 if (sequenceNumber >= dev->sequenceNumber)
6299 dev->sequenceNumber = sequenceNumber;
6301 /* TODO: Nasty sequence number! */
6304 ("Block scanning block %d has bad sequence number %d"
6305 TENDSTR), blk, sequenceNumber));
6312 (TSTR("%d blocks to be sorted..." TENDSTR), nBlocksToScan));
6318 /* Sort the blocks */
6319 #ifndef CONFIG_YAFFS_USE_OWN_SORT
6321 /* Use qsort now. */
6322 yaffs_qsort(blockIndex, nBlocksToScan, sizeof(yaffs_BlockIndex), ybicmp);
6326 /* Dungy old bubble sort... */
6328 yaffs_BlockIndex temp;
6332 for (i = 0; i < nBlocksToScan; i++)
6333 for (j = i + 1; j < nBlocksToScan; j++)
6334 if (blockIndex[i].seq > blockIndex[j].seq) {
6335 temp = blockIndex[j];
6336 blockIndex[j] = blockIndex[i];
6337 blockIndex[i] = temp;
6344 T(YAFFS_TRACE_SCAN, (TSTR("...done" TENDSTR)));
6346 /* Now scan the blocks looking at the data. */
6348 endIterator = nBlocksToScan - 1;
6349 T(YAFFS_TRACE_SCAN_DEBUG,
6350 (TSTR("%d blocks to be scanned" TENDSTR), nBlocksToScan));
6352 /* For each block.... backwards */
6353 for (blockIterator = endIterator; !alloc_failed && blockIterator >= startIterator;
6355 /* Cooperative multitasking! This loop can run for so
6356 long that watchdog timers expire. */
6359 /* get the block to scan in the correct order */
6360 blk = blockIndex[blockIterator].block;
6362 bi = yaffs_GetBlockInfo(dev, blk);
6365 state = bi->blockState;
6369 /* For each chunk in each block that needs scanning.... */
6370 foundChunksInBlock = 0;
6371 for (c = dev->nChunksPerBlock - 1;
6372 !alloc_failed && c >= 0 &&
6373 (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
6374 state == YAFFS_BLOCK_STATE_ALLOCATING); c--) {
6375 /* Scan backwards...
6376 * Read the tags and decide what to do
6379 chunk = blk * dev->nChunksPerBlock + c;
6381 result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk, NULL,
6384 /* Let's have a good look at this chunk... */
6386 if (!tags.chunkUsed) {
6387 /* An unassigned chunk in the block.
6388 * If there are used chunks after this one, then
6389 * it is a chunk that was skipped due to failing the erased
6390 * check. Just skip it so that it can be deleted.
6391 * But, more typically, We get here when this is an unallocated
6392 * chunk and his means that either the block is empty or
6393 * this is the one being allocated from
6396 if (foundChunksInBlock) {
6397 /* This is a chunk that was skipped due to failing the erased check */
6398 } else if (c == 0) {
6399 /* We're looking at the first chunk in the block so the block is unused */
6400 state = YAFFS_BLOCK_STATE_EMPTY;
6401 dev->nErasedBlocks++;
6403 if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
6404 state == YAFFS_BLOCK_STATE_ALLOCATING) {
6405 if (dev->sequenceNumber == bi->sequenceNumber) {
6406 /* this is the block being allocated from */
6410 (" Allocating from %d %d"
6413 state = YAFFS_BLOCK_STATE_ALLOCATING;
6414 dev->allocationBlock = blk;
6415 dev->allocationPage = c;
6416 dev->allocationBlockFinder = blk;
6418 /* This is a partially written block that is not
6419 * the current allocation block.
6422 T(YAFFS_TRACE_ALWAYS,
6423 (TSTR("Partially written block %d detected" TENDSTR),
6431 } else if (tags.eccResult == YAFFS_ECC_RESULT_UNFIXED) {
6433 (TSTR(" Unfixed ECC in chunk(%d:%d), chunk ignored"TENDSTR),
6438 } else if (tags.chunkId > 0) {
6439 /* chunkId > 0 so it is a data chunk... */
6440 unsigned int endpos;
6442 (tags.chunkId - 1) * dev->nDataBytesPerChunk;
6444 foundChunksInBlock = 1;
6447 yaffs_SetChunkBit(dev, blk, c);
6450 in = yaffs_FindOrCreateObjectByNumber(dev,
6453 YAFFS_OBJECT_TYPE_FILE);
6460 in->variantType == YAFFS_OBJECT_TYPE_FILE
6462 in->variant.fileVariant.shrinkSize) {
6463 /* This has not been invalidated by a resize */
6464 if (!yaffs_PutChunkIntoFile(in, tags.chunkId,
6469 /* File size is calculated by looking at the data chunks if we have not
6470 * seen an object header yet. Stop this practice once we find an object header.
6474 1) * dev->nDataBytesPerChunk +
6477 if (!in->valid && /* have not got an object header yet */
6478 in->variant.fileVariant.
6479 scannedFileSize < endpos) {
6480 in->variant.fileVariant.
6481 scannedFileSize = endpos;
6482 in->variant.fileVariant.
6484 in->variant.fileVariant.
6489 /* This chunk has been invalidated by a resize, so delete */
6490 yaffs_DeleteChunk(dev, chunk, 1, __LINE__);
6494 /* chunkId == 0, so it is an ObjectHeader.
6495 * Thus, we read in the object header and make the object
6497 foundChunksInBlock = 1;
6499 yaffs_SetChunkBit(dev, blk, c);
6505 if (tags.extraHeaderInfoAvailable) {
6506 in = yaffs_FindOrCreateObjectByNumber
6507 (dev, tags.objectId,
6508 tags.extraObjectType);
6514 (!in->valid && dev->disableLazyLoad) ||
6515 tags.extraShadows ||
6517 (tags.objectId == YAFFS_OBJECTID_ROOT ||
6518 tags.objectId == YAFFS_OBJECTID_LOSTNFOUND))) {
6520 /* If we don't have valid info then we need to read the chunk
6521 * TODO In future we can probably defer reading the chunk and
6522 * living with invalid data until needed.
6525 result = yaffs_ReadChunkWithTagsFromNAND(dev,
6530 oh = (yaffs_ObjectHeader *) chunkData;
6532 if (dev->inbandTags) {
6533 /* Fix up the header if they got corrupted by inband tags */
6534 oh->shadowsObject = oh->inbandShadowsObject;
6535 oh->isShrink = oh->inbandIsShrink;
6539 in = yaffs_FindOrCreateObjectByNumber(dev, tags.objectId, oh->type);
6547 /* TODO Hoosterman we have a problem! */
6548 T(YAFFS_TRACE_ERROR,
6550 ("yaffs tragedy: Could not make object for object %d at chunk %d during scan"
6551 TENDSTR), tags.objectId, chunk));
6556 /* We have already filled this one.
6557 * We have a duplicate that will be discarded, but
6558 * we first have to suck out resize info if it is a file.
6561 if ((in->variantType == YAFFS_OBJECT_TYPE_FILE) &&
6563 oh->type == YAFFS_OBJECT_TYPE_FILE) ||
6564 (tags.extraHeaderInfoAvailable &&
6565 tags.extraObjectType == YAFFS_OBJECT_TYPE_FILE))) {
6567 (oh) ? oh->fileSize : tags.
6569 __u32 parentObjectId =
6571 parentObjectId : tags.
6572 extraParentObjectId;
6576 (oh) ? oh->isShrink : tags.
6577 extraIsShrinkHeader;
6579 /* If it is deleted (unlinked at start also means deleted)
6580 * we treat the file size as being zeroed at this point.
6582 if (parentObjectId ==
6583 YAFFS_OBJECTID_DELETED
6584 || parentObjectId ==
6585 YAFFS_OBJECTID_UNLINKED) {
6591 in->variant.fileVariant.
6592 shrinkSize > thisSize) {
6593 in->variant.fileVariant.
6599 bi->hasShrinkHeader = 1;
6602 /* Use existing - destroy this one. */
6603 yaffs_DeleteChunk(dev, chunk, 1, __LINE__);
6607 if (!in->valid && in->variantType !=
6608 (oh ? oh->type : tags.extraObjectType))
6609 T(YAFFS_TRACE_ERROR, (
6610 TSTR("yaffs tragedy: Bad object type, "
6611 TCONT("%d != %d, for object %d at chunk ")
6612 TCONT("%d during scan")
6614 oh->type : tags.extraObjectType,
6615 in->variantType, tags.objectId,
6619 (tags.objectId == YAFFS_OBJECTID_ROOT ||
6621 YAFFS_OBJECTID_LOSTNFOUND)) {
6622 /* We only load some info, don't fiddle with directory structure */
6626 in->variantType = oh->type;
6628 in->yst_mode = oh->yst_mode;
6629 #ifdef CONFIG_YAFFS_WINCE
6630 in->win_atime[0] = oh->win_atime[0];
6631 in->win_ctime[0] = oh->win_ctime[0];
6632 in->win_mtime[0] = oh->win_mtime[0];
6633 in->win_atime[1] = oh->win_atime[1];
6634 in->win_ctime[1] = oh->win_ctime[1];
6635 in->win_mtime[1] = oh->win_mtime[1];
6637 in->yst_uid = oh->yst_uid;
6638 in->yst_gid = oh->yst_gid;
6639 in->yst_atime = oh->yst_atime;
6640 in->yst_mtime = oh->yst_mtime;
6641 in->yst_ctime = oh->yst_ctime;
6642 in->yst_rdev = oh->yst_rdev;
6646 in->variantType = tags.extraObjectType;
6650 in->hdrChunk = chunk;
6652 } else if (!in->valid) {
6653 /* we need to load this info */
6656 in->hdrChunk = chunk;
6659 in->variantType = oh->type;
6661 in->yst_mode = oh->yst_mode;
6662 #ifdef CONFIG_YAFFS_WINCE
6663 in->win_atime[0] = oh->win_atime[0];
6664 in->win_ctime[0] = oh->win_ctime[0];
6665 in->win_mtime[0] = oh->win_mtime[0];
6666 in->win_atime[1] = oh->win_atime[1];
6667 in->win_ctime[1] = oh->win_ctime[1];
6668 in->win_mtime[1] = oh->win_mtime[1];
6670 in->yst_uid = oh->yst_uid;
6671 in->yst_gid = oh->yst_gid;
6672 in->yst_atime = oh->yst_atime;
6673 in->yst_mtime = oh->yst_mtime;
6674 in->yst_ctime = oh->yst_ctime;
6675 in->yst_rdev = oh->yst_rdev;
6678 if (oh->shadowsObject > 0)
6679 yaffs_HandleShadowedObject(dev,
6686 yaffs_SetObjectName(in, oh->name);
6688 yaffs_FindOrCreateObjectByNumber
6689 (dev, oh->parentObjectId,
6690 YAFFS_OBJECT_TYPE_DIRECTORY);
6692 fileSize = oh->fileSize;
6693 isShrink = oh->isShrink;
6694 equivalentObjectId = oh->equivalentObjectId;
6697 in->variantType = tags.extraObjectType;
6699 yaffs_FindOrCreateObjectByNumber
6700 (dev, tags.extraParentObjectId,
6701 YAFFS_OBJECT_TYPE_DIRECTORY);
6702 fileSize = tags.extraFileLength;
6703 isShrink = tags.extraIsShrinkHeader;
6704 equivalentObjectId = tags.extraEquivalentObjectId;
6713 /* directory stuff...
6717 if (parent && parent->variantType ==
6718 YAFFS_OBJECT_TYPE_UNKNOWN) {
6719 /* Set up as a directory */
6720 parent->variantType =
6721 YAFFS_OBJECT_TYPE_DIRECTORY;
6722 YINIT_LIST_HEAD(&parent->variant.
6725 } else if (!parent || parent->variantType !=
6726 YAFFS_OBJECT_TYPE_DIRECTORY) {
6727 /* Hoosterman, another problem....
6728 * We're trying to use a non-directory as a directory
6731 T(YAFFS_TRACE_ERROR,
6733 ("yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found."
6735 parent = dev->lostNFoundDir;
6738 yaffs_AddObjectToDirectory(parent, in);
6740 itsUnlinked = (parent == dev->deletedDir) ||
6741 (parent == dev->unlinkedDir);
6744 /* Mark the block as having a shrinkHeader */
6745 bi->hasShrinkHeader = 1;
6748 /* Note re hardlinks.
6749 * Since we might scan a hardlink before its equivalent object is scanned
6750 * we put them all in a list.
6751 * After scanning is complete, we should have all the objects, so we run
6752 * through this list and fix up all the chains.
6755 switch (in->variantType) {
6756 case YAFFS_OBJECT_TYPE_UNKNOWN:
6757 /* Todo got a problem */
6759 case YAFFS_OBJECT_TYPE_FILE:
6761 if (in->variant.fileVariant.
6762 scannedFileSize < fileSize) {
6763 /* This covers the case where the file size is greater
6764 * than where the data is
6765 * This will happen if the file is resized to be larger
6766 * than its current data extents.
6768 in->variant.fileVariant.fileSize = fileSize;
6769 in->variant.fileVariant.scannedFileSize =
6770 in->variant.fileVariant.fileSize;
6774 in->variant.fileVariant.shrinkSize > fileSize) {
6775 in->variant.fileVariant.shrinkSize = fileSize;
6779 case YAFFS_OBJECT_TYPE_HARDLINK:
6781 in->variant.hardLinkVariant.equivalentObjectId =
6783 in->hardLinks.next =
6784 (struct ylist_head *) hardList;
6788 case YAFFS_OBJECT_TYPE_DIRECTORY:
6791 case YAFFS_OBJECT_TYPE_SPECIAL:
6794 case YAFFS_OBJECT_TYPE_SYMLINK:
6796 in->variant.symLinkVariant.alias =
6797 yaffs_CloneString(oh->alias);
6798 if (!in->variant.symLinkVariant.alias)
6808 } /* End of scanning for each chunk */
6810 if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
6811 /* If we got this far while scanning, then the block is fully allocated. */
6812 state = YAFFS_BLOCK_STATE_FULL;
6816 bi->blockState = state;
6818 /* Now let's see if it was dirty */
6819 if (bi->pagesInUse == 0 &&
6820 !bi->hasShrinkHeader &&
6821 bi->blockState == YAFFS_BLOCK_STATE_FULL) {
6822 yaffs_BlockBecameDirty(dev, blk);
6827 yaffs_SkipRestOfBlock(dev);
6830 YFREE_ALT(blockIndex);
6834 /* Ok, we've done all the scanning.
6835 * Fix up the hard link chains.
6836 * We should now have scanned all the objects, now it's time to add these
6839 yaffs_HardlinkFixup(dev, hardList);
6842 yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
6847 T(YAFFS_TRACE_SCAN, (TSTR("yaffs_ScanBackwards ends" TENDSTR)));
6852 /*------------------------------ Directory Functions ----------------------------- */
6854 static void yaffs_VerifyObjectInDirectory(yaffs_Object *obj)
6856 struct ylist_head *lh;
6857 yaffs_Object *listObj;
6862 T(YAFFS_TRACE_ALWAYS, (TSTR("No object to verify" TENDSTR)));
6867 if (yaffs_SkipVerification(obj->myDev))
6871 T(YAFFS_TRACE_ALWAYS, (TSTR("Object does not have parent" TENDSTR)));
6876 if (obj->parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
6877 T(YAFFS_TRACE_ALWAYS, (TSTR("Parent is not directory" TENDSTR)));
6881 /* Iterate through the objects in each hash entry */
6883 ylist_for_each(lh, &obj->parent->variant.directoryVariant.children) {
6885 listObj = ylist_entry(lh, yaffs_Object, siblings);
6886 yaffs_VerifyObject(listObj);
6893 T(YAFFS_TRACE_ALWAYS, (TSTR("Object in directory %d times" TENDSTR), count));
6898 static void yaffs_VerifyDirectory(yaffs_Object *directory)
6900 struct ylist_head *lh;
6901 yaffs_Object *listObj;
6908 if (yaffs_SkipFullVerification(directory->myDev))
6911 if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
6912 T(YAFFS_TRACE_ALWAYS, (TSTR("Directory has wrong type: %d" TENDSTR), directory->variantType));
6916 /* Iterate through the objects in each hash entry */
6918 ylist_for_each(lh, &directory->variant.directoryVariant.children) {
6920 listObj = ylist_entry(lh, yaffs_Object, siblings);
6921 if (listObj->parent != directory) {
6922 T(YAFFS_TRACE_ALWAYS, (TSTR("Object in directory list has wrong parent %p" TENDSTR), listObj->parent));
6925 yaffs_VerifyObjectInDirectory(listObj);
6931 *yaffs_UpdateParent() handles fixing a directories mtime and ctime when a new
6932 * link (ie. name) is created or deleted in the directory.
6935 * create dir/a : update dir's mtime/ctime
6936 * rm dir/a: update dir's mtime/ctime
6937 * modify dir/a: don't update dir's mtimme/ctime
6940 static void yaffs_UpdateParent(yaffs_Object *obj)
6946 obj->yst_mtime = obj->yst_ctime = Y_CURRENT_TIME;
6948 yaffs_UpdateObjectHeader(obj,NULL,0,0,0);
6951 static void yaffs_RemoveObjectFromDirectory(yaffs_Object *obj)
6953 yaffs_Device *dev = obj->myDev;
6954 yaffs_Object *parent;
6956 yaffs_VerifyObjectInDirectory(obj);
6957 parent = obj->parent;
6959 yaffs_VerifyDirectory(parent);
6961 if (dev && dev->removeObjectCallback)
6962 dev->removeObjectCallback(obj);
6965 ylist_del_init(&obj->siblings);
6968 yaffs_VerifyDirectory(parent);
6971 static void yaffs_AddObjectToDirectory(yaffs_Object *directory,
6975 T(YAFFS_TRACE_ALWAYS,
6977 ("tragedy: Trying to add an object to a null pointer directory"
6982 if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
6983 T(YAFFS_TRACE_ALWAYS,
6985 ("tragedy: Trying to add an object to a non-directory"
6990 if (obj->siblings.prev == NULL) {
6991 /* Not initialised */
6996 yaffs_VerifyDirectory(directory);
6998 yaffs_RemoveObjectFromDirectory(obj);
7002 ylist_add(&obj->siblings, &directory->variant.directoryVariant.children);
7003 obj->parent = directory;
7005 if (directory == obj->myDev->unlinkedDir
7006 || directory == obj->myDev->deletedDir) {
7008 obj->myDev->nUnlinkedFiles++;
7009 obj->renameAllowed = 0;
7012 yaffs_VerifyDirectory(directory);
7013 yaffs_VerifyObjectInDirectory(obj);
7016 yaffs_Object *yaffs_FindObjectByName(yaffs_Object *directory,
7021 struct ylist_head *i;
7022 YCHAR buffer[YAFFS_MAX_NAME_LENGTH + 1];
7030 T(YAFFS_TRACE_ALWAYS,
7032 ("tragedy: yaffs_FindObjectByName: null pointer directory"
7037 if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
7038 T(YAFFS_TRACE_ALWAYS,
7040 ("tragedy: yaffs_FindObjectByName: non-directory" TENDSTR)));
7044 sum = yaffs_CalcNameSum(name);
7046 ylist_for_each(i, &directory->variant.directoryVariant.children) {
7048 l = ylist_entry(i, yaffs_Object, siblings);
7050 if (l->parent != directory)
7053 yaffs_CheckObjectDetailsLoaded(l);
7055 /* Special case for lost-n-found */
7056 if (l->objectId == YAFFS_OBJECTID_LOSTNFOUND) {
7057 if (yaffs_strcmp(name, YAFFS_LOSTNFOUND_NAME) == 0)
7059 } else if (yaffs_SumCompare(l->sum, sum) || l->hdrChunk <= 0) {
7060 /* LostnFound chunk called Objxxx
7063 yaffs_GetObjectName(l, buffer,
7064 YAFFS_MAX_NAME_LENGTH + 1);
7065 if (yaffs_strncmp(name, buffer, YAFFS_MAX_NAME_LENGTH) == 0)
7076 int yaffs_ApplyToDirectoryChildren(yaffs_Object *theDir,
7077 int (*fn) (yaffs_Object *))
7079 struct ylist_head *i;
7083 T(YAFFS_TRACE_ALWAYS,
7085 ("tragedy: yaffs_FindObjectByName: null pointer directory"
7090 if (theDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
7091 T(YAFFS_TRACE_ALWAYS,
7093 ("tragedy: yaffs_FindObjectByName: non-directory" TENDSTR)));
7098 ylist_for_each(i, &theDir->variant.directoryVariant.children) {
7100 l = ylist_entry(i, yaffs_Object, siblings);
7111 /* GetEquivalentObject dereferences any hard links to get to the
7115 yaffs_Object *yaffs_GetEquivalentObject(yaffs_Object *obj)
7117 if (obj && obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) {
7118 /* We want the object id of the equivalent object, not this one */
7119 obj = obj->variant.hardLinkVariant.equivalentObject;
7120 yaffs_CheckObjectDetailsLoaded(obj);
7125 int yaffs_GetObjectName(yaffs_Object *obj, YCHAR *name, int buffSize)
7127 memset(name, 0, buffSize * sizeof(YCHAR));
7129 yaffs_CheckObjectDetailsLoaded(obj);
7131 if (obj->objectId == YAFFS_OBJECTID_LOSTNFOUND) {
7132 yaffs_strncpy(name, YAFFS_LOSTNFOUND_NAME, buffSize - 1);
7133 } else if (obj->hdrChunk <= 0) {
7135 YCHAR numString[20];
7136 YCHAR *x = &numString[19];
7137 unsigned v = obj->objectId;
7141 *x = '0' + (v % 10);
7144 /* make up a name */
7145 yaffs_strcpy(locName, YAFFS_LOSTNFOUND_PREFIX);
7146 yaffs_strcat(locName, x);
7147 yaffs_strncpy(name, locName, buffSize - 1);
7150 #ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM
7151 else if (obj->shortName[0])
7152 yaffs_strncpy(name, obj->shortName,YAFFS_SHORT_NAME_LENGTH+1);
7156 __u8 *buffer = yaffs_GetTempBuffer(obj->myDev, __LINE__);
7158 yaffs_ObjectHeader *oh = (yaffs_ObjectHeader *) buffer;
7160 memset(buffer, 0, obj->myDev->nDataBytesPerChunk);
7162 if (obj->hdrChunk > 0) {
7163 result = yaffs_ReadChunkWithTagsFromNAND(obj->myDev,
7164 obj->hdrChunk, buffer,
7167 yaffs_strncpy(name, oh->name, buffSize - 1);
7170 yaffs_ReleaseTempBuffer(obj->myDev, buffer, __LINE__);
7173 return yaffs_strnlen(name,buffSize-1);
7176 int yaffs_GetObjectFileLength(yaffs_Object *obj)
7178 /* Dereference any hard linking */
7179 obj = yaffs_GetEquivalentObject(obj);
7181 if (obj->variantType == YAFFS_OBJECT_TYPE_FILE)
7182 return obj->variant.fileVariant.fileSize;
7183 if (obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK){
7184 if(!obj->variant.symLinkVariant.alias)
7186 return yaffs_strnlen(obj->variant.symLinkVariant.alias,YAFFS_MAX_ALIAS_LENGTH);
7188 /* Only a directory should drop through to here */
7189 return obj->myDev->nDataBytesPerChunk;
7193 int yaffs_GetObjectLinkCount(yaffs_Object *obj)
7196 struct ylist_head *i;
7199 count++; /* the object itself */
7201 ylist_for_each(i, &obj->hardLinks)
7202 count++; /* add the hard links; */
7207 int yaffs_GetObjectInode(yaffs_Object *obj)
7209 obj = yaffs_GetEquivalentObject(obj);
7211 return obj->objectId;
7214 unsigned yaffs_GetObjectType(yaffs_Object *obj)
7216 obj = yaffs_GetEquivalentObject(obj);
7218 switch (obj->variantType) {
7219 case YAFFS_OBJECT_TYPE_FILE:
7222 case YAFFS_OBJECT_TYPE_DIRECTORY:
7225 case YAFFS_OBJECT_TYPE_SYMLINK:
7228 case YAFFS_OBJECT_TYPE_HARDLINK:
7231 case YAFFS_OBJECT_TYPE_SPECIAL:
7232 if (S_ISFIFO(obj->yst_mode))
7234 if (S_ISCHR(obj->yst_mode))
7236 if (S_ISBLK(obj->yst_mode))
7238 if (S_ISSOCK(obj->yst_mode))
7246 YCHAR *yaffs_GetSymlinkAlias(yaffs_Object *obj)
7248 obj = yaffs_GetEquivalentObject(obj);
7249 if (obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK)
7250 return yaffs_CloneString(obj->variant.symLinkVariant.alias);
7252 return yaffs_CloneString(_Y(""));
7255 #ifndef CONFIG_YAFFS_WINCE
7257 int yaffs_SetAttributes(yaffs_Object *obj, struct iattr *attr)
7259 unsigned int valid = attr->ia_valid;
7261 if (valid & ATTR_MODE)
7262 obj->yst_mode = attr->ia_mode;
7263 if (valid & ATTR_UID)
7264 obj->yst_uid = attr->ia_uid;
7265 if (valid & ATTR_GID)
7266 obj->yst_gid = attr->ia_gid;
7268 if (valid & ATTR_ATIME)
7269 obj->yst_atime = Y_TIME_CONVERT(attr->ia_atime);
7270 if (valid & ATTR_CTIME)
7271 obj->yst_ctime = Y_TIME_CONVERT(attr->ia_ctime);
7272 if (valid & ATTR_MTIME)
7273 obj->yst_mtime = Y_TIME_CONVERT(attr->ia_mtime);
7275 if (valid & ATTR_SIZE)
7276 yaffs_ResizeFile(obj, attr->ia_size);
7278 yaffs_UpdateObjectHeader(obj, NULL, 1, 0, 0);
7283 int yaffs_GetAttributes(yaffs_Object *obj, struct iattr *attr)
7285 unsigned int valid = 0;
7287 attr->ia_mode = obj->yst_mode;
7289 attr->ia_uid = obj->yst_uid;
7291 attr->ia_gid = obj->yst_gid;
7294 Y_TIME_CONVERT(attr->ia_atime) = obj->yst_atime;
7295 valid |= ATTR_ATIME;
7296 Y_TIME_CONVERT(attr->ia_ctime) = obj->yst_ctime;
7297 valid |= ATTR_CTIME;
7298 Y_TIME_CONVERT(attr->ia_mtime) = obj->yst_mtime;
7299 valid |= ATTR_MTIME;
7301 attr->ia_size = yaffs_GetFileSize(obj);
7304 attr->ia_valid = valid;
7312 int yaffs_DumpObject(yaffs_Object *obj)
7316 yaffs_GetObjectName(obj, name, YAFFS_MAX_NAME_LENGTH + 1);
7318 T(YAFFS_TRACE_ALWAYS,
7320 ("Object %d, inode %d \"%s\"\n dirty %d valid %d serial %d sum %d"
7321 " chunk %d type %d size %d\n"
7322 TENDSTR), obj->objectId, yaffs_GetObjectInode(obj), name,
7323 obj->dirty, obj->valid, obj->serial, obj->sum, obj->hdrChunk,
7324 yaffs_GetObjectType(obj), yaffs_GetObjectFileLength(obj)));
7330 /*---------------------------- Initialisation code -------------------------------------- */
7332 static int yaffs_CheckDevFunctions(const yaffs_Device *dev)
7335 /* Common functions, gotta have */
7336 if (!dev->eraseBlockInNAND || !dev->initialiseNAND)
7339 #ifdef CONFIG_YAFFS_YAFFS2
7341 /* Can use the "with tags" style interface for yaffs1 or yaffs2 */
7342 if (dev->writeChunkWithTagsToNAND &&
7343 dev->readChunkWithTagsFromNAND &&
7344 !dev->writeChunkToNAND &&
7345 !dev->readChunkFromNAND &&
7346 dev->markNANDBlockBad && dev->queryNANDBlock)
7350 /* Can use the "spare" style interface for yaffs1 */
7351 if (!dev->isYaffs2 &&
7352 !dev->writeChunkWithTagsToNAND &&
7353 !dev->readChunkWithTagsFromNAND &&
7354 dev->writeChunkToNAND &&
7355 dev->readChunkFromNAND &&
7356 !dev->markNANDBlockBad && !dev->queryNANDBlock)
7363 static int yaffs_CreateInitialDirectories(yaffs_Device *dev)
7365 /* Initialise the unlinked, deleted, root and lost and found directories */
7367 dev->lostNFoundDir = dev->rootDir = NULL;
7368 dev->unlinkedDir = dev->deletedDir = NULL;
7371 yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_UNLINKED, S_IFDIR);
7374 yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_DELETED, S_IFDIR);
7377 yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_ROOT,
7378 YAFFS_ROOT_MODE | S_IFDIR);
7379 dev->lostNFoundDir =
7380 yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_LOSTNFOUND,
7381 YAFFS_LOSTNFOUND_MODE | S_IFDIR);
7383 if (dev->lostNFoundDir && dev->rootDir && dev->unlinkedDir && dev->deletedDir) {
7384 yaffs_AddObjectToDirectory(dev->rootDir, dev->lostNFoundDir);
7391 int yaffs_GutsInitialise(yaffs_Device *dev)
7393 int init_failed = 0;
7397 T(YAFFS_TRACE_TRACING, (TSTR("yaffs: yaffs_GutsInitialise()" TENDSTR)));
7399 /* Check stuff that must be set */
7402 T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Need a device" TENDSTR)));
7406 dev->internalStartBlock = dev->startBlock;
7407 dev->internalEndBlock = dev->endBlock;
7408 dev->blockOffset = 0;
7409 dev->chunkOffset = 0;
7410 dev->nFreeChunks = 0;
7414 if (dev->startBlock == 0) {
7415 dev->internalStartBlock = dev->startBlock + 1;
7416 dev->internalEndBlock = dev->endBlock + 1;
7417 dev->blockOffset = 1;
7418 dev->chunkOffset = dev->nChunksPerBlock;
7421 /* Check geometry parameters. */
7423 if ((!dev->inbandTags && dev->isYaffs2 && dev->totalBytesPerChunk < 1024) ||
7424 (!dev->isYaffs2 && dev->totalBytesPerChunk < 512) ||
7425 (dev->inbandTags && !dev->isYaffs2) ||
7426 dev->nChunksPerBlock < 2 ||
7427 dev->nReservedBlocks < 2 ||
7428 dev->internalStartBlock <= 0 ||
7429 dev->internalEndBlock <= 0 ||
7430 dev->internalEndBlock <= (dev->internalStartBlock + dev->nReservedBlocks + 2)) { /* otherwise it is too small */
7431 T(YAFFS_TRACE_ALWAYS,
7433 ("yaffs: NAND geometry problems: chunk size %d, type is yaffs%s, inbandTags %d "
7434 TENDSTR), dev->totalBytesPerChunk, dev->isYaffs2 ? "2" : "", dev->inbandTags));
7438 if (yaffs_InitialiseNAND(dev) != YAFFS_OK) {
7439 T(YAFFS_TRACE_ALWAYS,
7440 (TSTR("yaffs: InitialiseNAND failed" TENDSTR)));
7444 /* Sort out space for inband tags, if required */
7445 if (dev->inbandTags)
7446 dev->nDataBytesPerChunk = dev->totalBytesPerChunk - sizeof(yaffs_PackedTags2TagsPart);
7448 dev->nDataBytesPerChunk = dev->totalBytesPerChunk;
7450 /* Got the right mix of functions? */
7451 if (!yaffs_CheckDevFunctions(dev)) {
7452 /* Function missing */
7453 T(YAFFS_TRACE_ALWAYS,
7455 ("yaffs: device function(s) missing or wrong\n" TENDSTR)));
7460 /* This is really a compilation check. */
7461 if (!yaffs_CheckStructures()) {
7462 T(YAFFS_TRACE_ALWAYS,
7463 (TSTR("yaffs_CheckStructures failed\n" TENDSTR)));
7467 if (dev->isMounted) {
7468 T(YAFFS_TRACE_ALWAYS,
7469 (TSTR("yaffs: device already mounted\n" TENDSTR)));
7473 /* Finished with most checks. One or two more checks happen later on too. */
7477 /* OK now calculate a few things for the device */
7480 * Calculate all the chunk size manipulation numbers:
7482 x = dev->nDataBytesPerChunk;
7483 /* We always use dev->chunkShift and dev->chunkDiv */
7484 dev->chunkShift = Shifts(x);
7485 x >>= dev->chunkShift;
7487 /* We only use chunk mask if chunkDiv is 1 */
7488 dev->chunkMask = (1<<dev->chunkShift) - 1;
7491 * Calculate chunkGroupBits.
7492 * We need to find the next power of 2 > than internalEndBlock
7495 x = dev->nChunksPerBlock * (dev->internalEndBlock + 1);
7499 /* Set up tnode width if wide tnodes are enabled. */
7500 if (!dev->wideTnodesDisabled) {
7501 /* bits must be even so that we end up with 32-bit words */
7505 dev->tnodeWidth = 16;
7507 dev->tnodeWidth = bits;
7509 dev->tnodeWidth = 16;
7511 dev->tnodeMask = (1<<dev->tnodeWidth)-1;
7513 /* Level0 Tnodes are 16 bits or wider (if wide tnodes are enabled),
7514 * so if the bitwidth of the
7515 * chunk range we're using is greater than 16 we need
7516 * to figure out chunk shift and chunkGroupSize
7519 if (bits <= dev->tnodeWidth)
7520 dev->chunkGroupBits = 0;
7522 dev->chunkGroupBits = bits - dev->tnodeWidth;
7525 dev->chunkGroupSize = 1 << dev->chunkGroupBits;
7527 if (dev->nChunksPerBlock < dev->chunkGroupSize) {
7528 /* We have a problem because the soft delete won't work if
7529 * the chunk group size > chunks per block.
7530 * This can be remedied by using larger "virtual blocks".
7532 T(YAFFS_TRACE_ALWAYS,
7533 (TSTR("yaffs: chunk group too large\n" TENDSTR)));
7538 /* OK, we've finished verifying the device, lets continue with initialisation */
7540 /* More device initialisation */
7541 dev->garbageCollections = 0;
7542 dev->passiveGarbageCollections = 0;
7543 dev->currentDirtyChecker = 0;
7544 dev->bufferedBlock = -1;
7545 dev->doingBufferedBlockRewrite = 0;
7546 dev->nDeletedFiles = 0;
7547 dev->nBackgroundDeletions = 0;
7548 dev->nUnlinkedFiles = 0;
7550 dev->eccUnfixed = 0;
7551 dev->tagsEccFixed = 0;
7552 dev->tagsEccUnfixed = 0;
7553 dev->nErasureFailures = 0;
7554 dev->nErasedBlocks = 0;
7556 dev->hasPendingPrioritisedGCs = 1; /* Assume the worst for now, will get fixed on first GC */
7558 /* Initialise temporary buffers and caches. */
7559 if (!yaffs_InitialiseTempBuffers(dev))
7562 dev->srCache = NULL;
7563 dev->gcCleanupList = NULL;
7567 dev->nShortOpCaches > 0) {
7570 int srCacheBytes = dev->nShortOpCaches * sizeof(yaffs_ChunkCache);
7572 if (dev->nShortOpCaches > YAFFS_MAX_SHORT_OP_CACHES)
7573 dev->nShortOpCaches = YAFFS_MAX_SHORT_OP_CACHES;
7575 dev->srCache = YMALLOC(srCacheBytes);
7577 buf = (__u8 *) dev->srCache;
7580 memset(dev->srCache, 0, srCacheBytes);
7582 for (i = 0; i < dev->nShortOpCaches && buf; i++) {
7583 dev->srCache[i].object = NULL;
7584 dev->srCache[i].lastUse = 0;
7585 dev->srCache[i].dirty = 0;
7586 dev->srCache[i].data = buf = YMALLOC_DMA(dev->totalBytesPerChunk);
7597 dev->gcCleanupList = YMALLOC(dev->nChunksPerBlock * sizeof(__u32));
7598 if (!dev->gcCleanupList)
7603 dev->useHeaderFileSize = 1;
7605 if (!init_failed && !yaffs_InitialiseBlocks(dev))
7608 yaffs_InitialiseTnodes(dev);
7609 yaffs_InitialiseObjects(dev);
7611 if (!init_failed && !yaffs_CreateInitialDirectories(dev))
7616 /* Now scan the flash. */
7617 if (dev->isYaffs2) {
7618 if (yaffs_CheckpointRestore(dev)) {
7619 yaffs_CheckObjectDetailsLoaded(dev->rootDir);
7620 T(YAFFS_TRACE_ALWAYS,
7621 (TSTR("yaffs: restored from checkpoint" TENDSTR)));
7624 /* Clean up the mess caused by an aborted checkpoint load
7625 * and scan backwards.
7627 yaffs_DeinitialiseBlocks(dev);
7628 yaffs_DeinitialiseTnodes(dev);
7629 yaffs_DeinitialiseObjects(dev);
7632 dev->nErasedBlocks = 0;
7633 dev->nFreeChunks = 0;
7634 dev->allocationBlock = -1;
7635 dev->allocationPage = -1;
7636 dev->nDeletedFiles = 0;
7637 dev->nUnlinkedFiles = 0;
7638 dev->nBackgroundDeletions = 0;
7639 dev->oldestDirtySequence = 0;
7641 if (!init_failed && !yaffs_InitialiseBlocks(dev))
7644 yaffs_InitialiseTnodes(dev);
7645 yaffs_InitialiseObjects(dev);
7647 if (!init_failed && !yaffs_CreateInitialDirectories(dev))
7650 if (!init_failed && !yaffs_ScanBackwards(dev))
7653 } else if (!yaffs_Scan(dev))
7656 yaffs_StripDeletedObjects(dev);
7657 yaffs_FixHangingObjects(dev);
7658 if(dev->emptyLostAndFound)
7659 yaffs_EmptyLostAndFound(dev);
7663 /* Clean up the mess */
7664 T(YAFFS_TRACE_TRACING,
7665 (TSTR("yaffs: yaffs_GutsInitialise() aborted.\n" TENDSTR)));
7667 yaffs_Deinitialise(dev);
7671 /* Zero out stats */
7672 dev->nPageReads = 0;
7673 dev->nPageWrites = 0;
7674 dev->nBlockErasures = 0;
7676 dev->nRetriedWrites = 0;
7678 dev->nRetiredBlocks = 0;
7680 yaffs_VerifyFreeChunks(dev);
7681 yaffs_VerifyBlocks(dev);
7683 /* Clean up any aborted checkpoint data */
7684 if(!dev->isCheckpointed && dev->blocksInCheckpoint > 0)
7685 yaffs_InvalidateCheckpoint(dev);
7687 T(YAFFS_TRACE_TRACING,
7688 (TSTR("yaffs: yaffs_GutsInitialise() done.\n" TENDSTR)));
7693 void yaffs_Deinitialise(yaffs_Device *dev)
7695 if (dev->isMounted) {
7698 yaffs_DeinitialiseBlocks(dev);
7699 yaffs_DeinitialiseTnodes(dev);
7700 yaffs_DeinitialiseObjects(dev);
7701 if (dev->nShortOpCaches > 0 &&
7704 for (i = 0; i < dev->nShortOpCaches; i++) {
7705 if (dev->srCache[i].data)
7706 YFREE(dev->srCache[i].data);
7707 dev->srCache[i].data = NULL;
7710 YFREE(dev->srCache);
7711 dev->srCache = NULL;
7714 YFREE(dev->gcCleanupList);
7716 for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++)
7717 YFREE(dev->tempBuffer[i].buffer);
7721 if (dev->deinitialiseNAND)
7722 dev->deinitialiseNAND(dev);
7726 static int yaffs_CountFreeChunks(yaffs_Device *dev)
7731 yaffs_BlockInfo *blk;
7733 for (nFree = 0, b = dev->internalStartBlock; b <= dev->internalEndBlock;
7735 blk = yaffs_GetBlockInfo(dev, b);
7737 switch (blk->blockState) {
7738 case YAFFS_BLOCK_STATE_EMPTY:
7739 case YAFFS_BLOCK_STATE_ALLOCATING:
7740 case YAFFS_BLOCK_STATE_COLLECTING:
7741 case YAFFS_BLOCK_STATE_FULL:
7743 (dev->nChunksPerBlock - blk->pagesInUse +
7744 blk->softDeletions);
7754 int yaffs_GetNumberOfFreeChunks(yaffs_Device *dev)
7756 /* This is what we report to the outside world */
7759 int nDirtyCacheChunks;
7760 int blocksForCheckpoint;
7764 nFree = dev->nFreeChunks;
7766 nFree = yaffs_CountFreeChunks(dev);
7769 nFree += dev->nDeletedFiles;
7771 /* Now count the number of dirty chunks in the cache and subtract those */
7773 for (nDirtyCacheChunks = 0, i = 0; i < dev->nShortOpCaches; i++) {
7774 if (dev->srCache[i].dirty)
7775 nDirtyCacheChunks++;
7778 nFree -= nDirtyCacheChunks;
7780 nFree -= ((dev->nReservedBlocks + 1) * dev->nChunksPerBlock);
7782 /* Now we figure out how much to reserve for the checkpoint and report that... */
7783 blocksForCheckpoint = yaffs_CalcCheckpointBlocksRequired(dev) - dev->blocksInCheckpoint;
7784 if (blocksForCheckpoint < 0)
7785 blocksForCheckpoint = 0;
7787 nFree -= (blocksForCheckpoint * dev->nChunksPerBlock);
7796 static int yaffs_freeVerificationFailures;
7798 static void yaffs_VerifyFreeChunks(yaffs_Device *dev)
7803 if (yaffs_SkipVerification(dev))
7806 counted = yaffs_CountFreeChunks(dev);
7808 difference = dev->nFreeChunks - counted;
7811 T(YAFFS_TRACE_ALWAYS,
7812 (TSTR("Freechunks verification failure %d %d %d" TENDSTR),
7813 dev->nFreeChunks, counted, difference));
7814 yaffs_freeVerificationFailures++;
7818 /*---------------------------------------- YAFFS test code ----------------------*/
7820 #define yaffs_CheckStruct(structure, syze, name) \
7822 if (sizeof(structure) != syze) { \
7823 T(YAFFS_TRACE_ALWAYS, (TSTR("%s should be %d but is %d\n" TENDSTR),\
7824 name, syze, (int) sizeof(structure))); \
7825 return YAFFS_FAIL; \
7829 static int yaffs_CheckStructures(void)
7831 /* yaffs_CheckStruct(yaffs_Tags,8,"yaffs_Tags"); */
7832 /* yaffs_CheckStruct(yaffs_TagsUnion,8,"yaffs_TagsUnion"); */
7833 /* yaffs_CheckStruct(yaffs_Spare,16,"yaffs_Spare"); */
7834 #ifndef CONFIG_YAFFS_TNODE_LIST_DEBUG
7835 /* yaffs_CheckStruct(yaffs_Tnode, 2 * YAFFS_NTNODES_LEVEL0, "yaffs_Tnode"); */
7837 #ifndef CONFIG_YAFFS_WINCE
7838 yaffs_CheckStruct(yaffs_ObjectHeader, 512, "yaffs_ObjectHeader");