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 1.95 2009-11-11 01:40:41 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 /* Function to calculate chunk and offset */
118 static void yaffs_AddrToChunk(yaffs_Device *dev, loff_t addr, int *chunkOut,
124 chunk = (__u32)(addr >> dev->chunkShift);
126 if (dev->chunkDiv == 1) {
127 /* easy power of 2 case */
128 offset = (__u32)(addr & dev->chunkMask);
130 /* Non power-of-2 case */
134 chunk /= dev->chunkDiv;
136 chunkBase = ((loff_t)chunk) * dev->nDataBytesPerChunk;
137 offset = (__u32)(addr - chunkBase);
144 /* Function to return the number of shifts for a power of 2 greater than or
145 * equal to the given number
146 * Note we don't try to cater for all possible numbers and this does not have to
147 * be hellishly efficient.
150 static __u32 ShiftsGE(__u32 x)
155 nShifts = extraBits = 0;
170 /* Function to return the number of shifts to get a 1 in bit 0
173 static __u32 Shifts(__u32 x)
193 * Temporary buffer manipulations.
196 static int yaffs_InitialiseTempBuffers(yaffs_Device *dev)
199 __u8 *buf = (__u8 *)1;
201 memset(dev->tempBuffer, 0, sizeof(dev->tempBuffer));
203 for (i = 0; buf && i < YAFFS_N_TEMP_BUFFERS; i++) {
204 dev->tempBuffer[i].line = 0; /* not in use */
205 dev->tempBuffer[i].buffer = buf =
206 YMALLOC_DMA(dev->totalBytesPerChunk);
209 return buf ? YAFFS_OK : YAFFS_FAIL;
212 __u8 *yaffs_GetTempBuffer(yaffs_Device *dev, int lineNo)
217 if (dev->tempInUse > dev->maxTemp)
218 dev->maxTemp = dev->tempInUse;
220 for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) {
221 if (dev->tempBuffer[i].line == 0) {
222 dev->tempBuffer[i].line = lineNo;
223 if ((i + 1) > dev->maxTemp) {
224 dev->maxTemp = i + 1;
225 for (j = 0; j <= i; j++)
226 dev->tempBuffer[j].maxLine =
227 dev->tempBuffer[j].line;
230 return dev->tempBuffer[i].buffer;
234 T(YAFFS_TRACE_BUFFERS,
235 (TSTR("Out of temp buffers at line %d, other held by lines:"),
237 for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++)
238 T(YAFFS_TRACE_BUFFERS, (TSTR(" %d "), dev->tempBuffer[i].line));
240 T(YAFFS_TRACE_BUFFERS, (TSTR(" " TENDSTR)));
243 * If we got here then we have to allocate an unmanaged one
247 dev->unmanagedTempAllocations++;
248 return YMALLOC(dev->nDataBytesPerChunk);
252 void yaffs_ReleaseTempBuffer(yaffs_Device *dev, __u8 *buffer,
259 for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) {
260 if (dev->tempBuffer[i].buffer == buffer) {
261 dev->tempBuffer[i].line = 0;
267 /* assume it is an unmanaged one. */
268 T(YAFFS_TRACE_BUFFERS,
269 (TSTR("Releasing unmanaged temp buffer in line %d" TENDSTR),
272 dev->unmanagedTempDeallocations++;
278 * Determine if we have a managed buffer.
280 int yaffs_IsManagedTempBuffer(yaffs_Device *dev, const __u8 *buffer)
284 for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) {
285 if (dev->tempBuffer[i].buffer == buffer)
289 for (i = 0; i < dev->nShortOpCaches; i++) {
290 if (dev->srCache[i].data == buffer)
294 if (buffer == dev->checkpointBuffer)
297 T(YAFFS_TRACE_ALWAYS,
298 (TSTR("yaffs: unmaged buffer detected.\n" TENDSTR)));
305 * Chunk bitmap manipulations
308 static Y_INLINE __u8 *yaffs_BlockBits(yaffs_Device *dev, int blk)
310 if (blk < dev->internalStartBlock || blk > dev->internalEndBlock) {
312 (TSTR("**>> yaffs: BlockBits block %d is not valid" TENDSTR),
316 return dev->chunkBits +
317 (dev->chunkBitmapStride * (blk - dev->internalStartBlock));
320 static Y_INLINE void yaffs_VerifyChunkBitId(yaffs_Device *dev, int blk, int chunk)
322 if (blk < dev->internalStartBlock || blk > dev->internalEndBlock ||
323 chunk < 0 || chunk >= dev->nChunksPerBlock) {
325 (TSTR("**>> yaffs: Chunk Id (%d:%d) invalid"TENDSTR),
331 static Y_INLINE void yaffs_ClearChunkBits(yaffs_Device *dev, int blk)
333 __u8 *blkBits = yaffs_BlockBits(dev, blk);
335 memset(blkBits, 0, dev->chunkBitmapStride);
338 static Y_INLINE void yaffs_ClearChunkBit(yaffs_Device *dev, int blk, int chunk)
340 __u8 *blkBits = yaffs_BlockBits(dev, blk);
342 yaffs_VerifyChunkBitId(dev, blk, chunk);
344 blkBits[chunk / 8] &= ~(1 << (chunk & 7));
347 static Y_INLINE void yaffs_SetChunkBit(yaffs_Device *dev, int blk, int chunk)
349 __u8 *blkBits = yaffs_BlockBits(dev, blk);
351 yaffs_VerifyChunkBitId(dev, blk, chunk);
353 blkBits[chunk / 8] |= (1 << (chunk & 7));
356 static Y_INLINE int yaffs_CheckChunkBit(yaffs_Device *dev, int blk, int chunk)
358 __u8 *blkBits = yaffs_BlockBits(dev, blk);
359 yaffs_VerifyChunkBitId(dev, blk, chunk);
361 return (blkBits[chunk / 8] & (1 << (chunk & 7))) ? 1 : 0;
364 static Y_INLINE int yaffs_StillSomeChunkBits(yaffs_Device *dev, int blk)
366 __u8 *blkBits = yaffs_BlockBits(dev, blk);
368 for (i = 0; i < dev->chunkBitmapStride; i++) {
376 static int yaffs_CountChunkBits(yaffs_Device *dev, int blk)
378 __u8 *blkBits = yaffs_BlockBits(dev, blk);
381 for (i = 0; i < dev->chunkBitmapStride; i++) {
398 static int yaffs_SkipVerification(yaffs_Device *dev)
400 return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY | YAFFS_TRACE_VERIFY_FULL));
403 static int yaffs_SkipFullVerification(yaffs_Device *dev)
405 return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY_FULL));
408 static int yaffs_SkipNANDVerification(yaffs_Device *dev)
410 return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY_NAND));
413 static const char *blockStateName[] = {
426 static void yaffs_VerifyBlock(yaffs_Device *dev, yaffs_BlockInfo *bi, int n)
431 if (yaffs_SkipVerification(dev))
434 /* Report illegal runtime states */
435 if (bi->blockState >= YAFFS_NUMBER_OF_BLOCK_STATES)
436 T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has undefined state %d"TENDSTR), n, bi->blockState));
438 switch (bi->blockState) {
439 case YAFFS_BLOCK_STATE_UNKNOWN:
440 case YAFFS_BLOCK_STATE_SCANNING:
441 case YAFFS_BLOCK_STATE_NEEDS_SCANNING:
442 T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has bad run-state %s"TENDSTR),
443 n, blockStateName[bi->blockState]));
446 /* Check pages in use and soft deletions are legal */
448 actuallyUsed = bi->pagesInUse - bi->softDeletions;
450 if (bi->pagesInUse < 0 || bi->pagesInUse > dev->nChunksPerBlock ||
451 bi->softDeletions < 0 || bi->softDeletions > dev->nChunksPerBlock ||
452 actuallyUsed < 0 || actuallyUsed > dev->nChunksPerBlock)
453 T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has illegal values pagesInUsed %d softDeletions %d"TENDSTR),
454 n, bi->pagesInUse, bi->softDeletions));
457 /* Check chunk bitmap legal */
458 inUse = yaffs_CountChunkBits(dev, n);
459 if (inUse != bi->pagesInUse)
460 T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has inconsistent values pagesInUse %d counted chunk bits %d"TENDSTR),
461 n, bi->pagesInUse, inUse));
463 /* Check that the sequence number is valid.
464 * Ten million is legal, but is very unlikely
467 (bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING || bi->blockState == YAFFS_BLOCK_STATE_FULL) &&
468 (bi->sequenceNumber < YAFFS_LOWEST_SEQUENCE_NUMBER || bi->sequenceNumber > 10000000))
469 T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has suspect sequence number of %d"TENDSTR),
470 n, bi->sequenceNumber));
473 static void yaffs_VerifyCollectedBlock(yaffs_Device *dev, yaffs_BlockInfo *bi,
476 yaffs_VerifyBlock(dev, bi, n);
478 /* After collection the block should be in the erased state */
479 /* This will need to change if we do partial gc */
481 if (bi->blockState != YAFFS_BLOCK_STATE_COLLECTING &&
482 bi->blockState != YAFFS_BLOCK_STATE_EMPTY) {
483 T(YAFFS_TRACE_ERROR, (TSTR("Block %d is in state %d after gc, should be erased"TENDSTR),
488 static void yaffs_VerifyBlocks(yaffs_Device *dev)
491 int nBlocksPerState[YAFFS_NUMBER_OF_BLOCK_STATES];
492 int nIllegalBlockStates = 0;
494 if (yaffs_SkipVerification(dev))
497 memset(nBlocksPerState, 0, sizeof(nBlocksPerState));
499 for (i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) {
500 yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, i);
501 yaffs_VerifyBlock(dev, bi, i);
503 if (bi->blockState < YAFFS_NUMBER_OF_BLOCK_STATES)
504 nBlocksPerState[bi->blockState]++;
506 nIllegalBlockStates++;
509 T(YAFFS_TRACE_VERIFY, (TSTR(""TENDSTR)));
510 T(YAFFS_TRACE_VERIFY, (TSTR("Block summary"TENDSTR)));
512 T(YAFFS_TRACE_VERIFY, (TSTR("%d blocks have illegal states"TENDSTR), nIllegalBlockStates));
513 if (nBlocksPerState[YAFFS_BLOCK_STATE_ALLOCATING] > 1)
514 T(YAFFS_TRACE_VERIFY, (TSTR("Too many allocating blocks"TENDSTR)));
516 for (i = 0; i < YAFFS_NUMBER_OF_BLOCK_STATES; i++)
517 T(YAFFS_TRACE_VERIFY,
518 (TSTR("%s %d blocks"TENDSTR),
519 blockStateName[i], nBlocksPerState[i]));
521 if (dev->blocksInCheckpoint != nBlocksPerState[YAFFS_BLOCK_STATE_CHECKPOINT])
522 T(YAFFS_TRACE_VERIFY,
523 (TSTR("Checkpoint block count wrong dev %d count %d"TENDSTR),
524 dev->blocksInCheckpoint, nBlocksPerState[YAFFS_BLOCK_STATE_CHECKPOINT]));
526 if (dev->nErasedBlocks != nBlocksPerState[YAFFS_BLOCK_STATE_EMPTY])
527 T(YAFFS_TRACE_VERIFY,
528 (TSTR("Erased block count wrong dev %d count %d"TENDSTR),
529 dev->nErasedBlocks, nBlocksPerState[YAFFS_BLOCK_STATE_EMPTY]));
531 if (nBlocksPerState[YAFFS_BLOCK_STATE_COLLECTING] > 1)
532 T(YAFFS_TRACE_VERIFY,
533 (TSTR("Too many collecting blocks %d (max is 1)"TENDSTR),
534 nBlocksPerState[YAFFS_BLOCK_STATE_COLLECTING]));
536 T(YAFFS_TRACE_VERIFY, (TSTR(""TENDSTR)));
541 * Verify the object header. oh must be valid, but obj and tags may be NULL in which
542 * case those tests will not be performed.
544 static void yaffs_VerifyObjectHeader(yaffs_Object *obj, yaffs_ObjectHeader *oh, yaffs_ExtendedTags *tags, int parentCheck)
546 if (obj && yaffs_SkipVerification(obj->myDev))
549 if (!(tags && obj && oh)) {
550 T(YAFFS_TRACE_VERIFY,
551 (TSTR("Verifying object header tags %x obj %x oh %x"TENDSTR),
552 (__u32)tags, (__u32)obj, (__u32)oh));
556 if (oh->type <= YAFFS_OBJECT_TYPE_UNKNOWN ||
557 oh->type > YAFFS_OBJECT_TYPE_MAX)
558 T(YAFFS_TRACE_VERIFY,
559 (TSTR("Obj %d header type is illegal value 0x%x"TENDSTR),
560 tags->objectId, oh->type));
562 if (tags->objectId != obj->objectId)
563 T(YAFFS_TRACE_VERIFY,
564 (TSTR("Obj %d header mismatch objectId %d"TENDSTR),
565 tags->objectId, obj->objectId));
569 * Check that the object's parent ids match if parentCheck requested.
571 * Tests do not apply to the root object.
574 if (parentCheck && tags->objectId > 1 && !obj->parent)
575 T(YAFFS_TRACE_VERIFY,
576 (TSTR("Obj %d header mismatch parentId %d obj->parent is NULL"TENDSTR),
577 tags->objectId, oh->parentObjectId));
579 if (parentCheck && obj->parent &&
580 oh->parentObjectId != obj->parent->objectId &&
581 (oh->parentObjectId != YAFFS_OBJECTID_UNLINKED ||
582 obj->parent->objectId != YAFFS_OBJECTID_DELETED))
583 T(YAFFS_TRACE_VERIFY,
584 (TSTR("Obj %d header mismatch parentId %d parentObjectId %d"TENDSTR),
585 tags->objectId, oh->parentObjectId, obj->parent->objectId));
587 if (tags->objectId > 1 && oh->name[0] == 0) /* Null name */
588 T(YAFFS_TRACE_VERIFY,
589 (TSTR("Obj %d header name is NULL"TENDSTR),
592 if (tags->objectId > 1 && ((__u8)(oh->name[0])) == 0xff) /* Trashed name */
593 T(YAFFS_TRACE_VERIFY,
594 (TSTR("Obj %d header name is 0xFF"TENDSTR),
600 static int yaffs_VerifyTnodeWorker(yaffs_Object *obj, yaffs_Tnode *tn,
601 __u32 level, int chunkOffset)
604 yaffs_Device *dev = obj->myDev;
610 for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++) {
611 if (tn->internal[i]) {
612 ok = yaffs_VerifyTnodeWorker(obj,
615 (chunkOffset<<YAFFS_TNODES_INTERNAL_BITS) + i);
618 } else if (level == 0) {
619 yaffs_ExtendedTags tags;
620 __u32 objectId = obj->objectId;
622 chunkOffset <<= YAFFS_TNODES_LEVEL0_BITS;
624 for (i = 0; i < YAFFS_NTNODES_LEVEL0; i++) {
625 __u32 theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
628 /* T(~0,(TSTR("verifying (%d:%d) %d"TENDSTR),tags.objectId,tags.chunkId,theChunk)); */
629 yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL, &tags);
630 if (tags.objectId != objectId || tags.chunkId != chunkOffset) {
631 T(~0, (TSTR("Object %d chunkId %d NAND mismatch chunk %d tags (%d:%d)"TENDSTR),
632 objectId, chunkOffset, theChunk,
633 tags.objectId, tags.chunkId));
646 static void yaffs_VerifyFile(yaffs_Object *obj)
648 int requiredTallness;
654 yaffs_ExtendedTags tags;
661 if (yaffs_SkipVerification(obj->myDev))
665 objectId = obj->objectId;
667 /* Check file size is consistent with tnode depth */
668 lastChunk = obj->variant.fileVariant.fileSize / dev->nDataBytesPerChunk + 1;
669 x = lastChunk >> YAFFS_TNODES_LEVEL0_BITS;
670 requiredTallness = 0;
672 x >>= YAFFS_TNODES_INTERNAL_BITS;
676 actualTallness = obj->variant.fileVariant.topLevel;
678 if (requiredTallness > actualTallness)
679 T(YAFFS_TRACE_VERIFY,
680 (TSTR("Obj %d had tnode tallness %d, needs to be %d"TENDSTR),
681 obj->objectId, actualTallness, requiredTallness));
684 /* Check that the chunks in the tnode tree are all correct.
685 * We do this by scanning through the tnode tree and
686 * checking the tags for every chunk match.
689 if (yaffs_SkipNANDVerification(dev))
692 for (i = 1; i <= lastChunk; i++) {
693 tn = yaffs_FindLevel0Tnode(dev, &obj->variant.fileVariant, i);
696 __u32 theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
698 /* T(~0,(TSTR("verifying (%d:%d) %d"TENDSTR),objectId,i,theChunk)); */
699 yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL, &tags);
700 if (tags.objectId != objectId || tags.chunkId != i) {
701 T(~0, (TSTR("Object %d chunkId %d NAND mismatch chunk %d tags (%d:%d)"TENDSTR),
702 objectId, i, theChunk,
703 tags.objectId, tags.chunkId));
711 static void yaffs_VerifyHardLink(yaffs_Object *obj)
713 if (obj && yaffs_SkipVerification(obj->myDev))
716 /* Verify sane equivalent object */
719 static void yaffs_VerifySymlink(yaffs_Object *obj)
721 if (obj && yaffs_SkipVerification(obj->myDev))
724 /* Verify symlink string */
727 static void yaffs_VerifySpecial(yaffs_Object *obj)
729 if (obj && yaffs_SkipVerification(obj->myDev))
733 static void yaffs_VerifyObject(yaffs_Object *obj)
742 __u32 chunkShouldNotBeDeleted;
748 if (obj->beingCreated)
753 if (yaffs_SkipVerification(dev))
756 /* Check sane object header chunk */
758 chunkMin = dev->internalStartBlock * dev->nChunksPerBlock;
759 chunkMax = (dev->internalEndBlock+1) * dev->nChunksPerBlock - 1;
761 chunkInRange = (((unsigned)(obj->hdrChunk)) >= chunkMin && ((unsigned)(obj->hdrChunk)) <= chunkMax);
762 chunkIdOk = chunkInRange || (obj->hdrChunk == 0);
763 chunkValid = chunkInRange &&
764 yaffs_CheckChunkBit(dev,
765 obj->hdrChunk / dev->nChunksPerBlock,
766 obj->hdrChunk % dev->nChunksPerBlock);
767 chunkShouldNotBeDeleted = chunkInRange && !chunkValid;
770 (!chunkIdOk || chunkShouldNotBeDeleted)) {
771 T(YAFFS_TRACE_VERIFY,
772 (TSTR("Obj %d has chunkId %d %s %s"TENDSTR),
773 obj->objectId, obj->hdrChunk,
774 chunkIdOk ? "" : ",out of range",
775 chunkShouldNotBeDeleted ? ",marked as deleted" : ""));
778 if (chunkValid && !yaffs_SkipNANDVerification(dev)) {
779 yaffs_ExtendedTags tags;
780 yaffs_ObjectHeader *oh;
781 __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__);
783 oh = (yaffs_ObjectHeader *)buffer;
785 yaffs_ReadChunkWithTagsFromNAND(dev, obj->hdrChunk, buffer,
788 yaffs_VerifyObjectHeader(obj, oh, &tags, 1);
790 yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
793 /* Verify it has a parent */
794 if (obj && !obj->fake &&
795 (!obj->parent || obj->parent->myDev != dev)) {
796 T(YAFFS_TRACE_VERIFY,
797 (TSTR("Obj %d has parent pointer %p which does not look like an object"TENDSTR),
798 obj->objectId, obj->parent));
801 /* Verify parent is a directory */
802 if (obj->parent && obj->parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
803 T(YAFFS_TRACE_VERIFY,
804 (TSTR("Obj %d's parent is not a directory (type %d)"TENDSTR),
805 obj->objectId, obj->parent->variantType));
808 switch (obj->variantType) {
809 case YAFFS_OBJECT_TYPE_FILE:
810 yaffs_VerifyFile(obj);
812 case YAFFS_OBJECT_TYPE_SYMLINK:
813 yaffs_VerifySymlink(obj);
815 case YAFFS_OBJECT_TYPE_DIRECTORY:
816 yaffs_VerifyDirectory(obj);
818 case YAFFS_OBJECT_TYPE_HARDLINK:
819 yaffs_VerifyHardLink(obj);
821 case YAFFS_OBJECT_TYPE_SPECIAL:
822 yaffs_VerifySpecial(obj);
824 case YAFFS_OBJECT_TYPE_UNKNOWN:
826 T(YAFFS_TRACE_VERIFY,
827 (TSTR("Obj %d has illegaltype %d"TENDSTR),
828 obj->objectId, obj->variantType));
833 static void yaffs_VerifyObjects(yaffs_Device *dev)
837 struct ylist_head *lh;
839 if (yaffs_SkipVerification(dev))
842 /* Iterate through the objects in each hash entry */
844 for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
845 ylist_for_each(lh, &dev->objectBucket[i].list) {
847 obj = ylist_entry(lh, yaffs_Object, hashLink);
848 yaffs_VerifyObject(obj);
856 * Simple hash function. Needs to have a reasonable spread
859 static Y_INLINE int yaffs_HashFunction(int n)
862 return n % YAFFS_NOBJECT_BUCKETS;
866 * Access functions to useful fake objects.
867 * Note that root might have a presence in NAND if permissions are set.
870 yaffs_Object *yaffs_Root(yaffs_Device *dev)
875 yaffs_Object *yaffs_LostNFound(yaffs_Device *dev)
877 return dev->lostNFoundDir;
882 * Erased NAND checking functions
885 int yaffs_CheckFF(__u8 *buffer, int nBytes)
887 /* Horrible, slow implementation */
896 static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,
899 int retval = YAFFS_OK;
900 __u8 *data = yaffs_GetTempBuffer(dev, __LINE__);
901 yaffs_ExtendedTags tags;
904 result = yaffs_ReadChunkWithTagsFromNAND(dev, chunkInNAND, data, &tags);
906 if (tags.eccResult > YAFFS_ECC_RESULT_NO_ERROR)
909 if (!yaffs_CheckFF(data, dev->nDataBytesPerChunk) || tags.chunkUsed) {
910 T(YAFFS_TRACE_NANDACCESS,
911 (TSTR("Chunk %d not erased" TENDSTR), chunkInNAND));
915 yaffs_ReleaseTempBuffer(dev, data, __LINE__);
921 static int yaffs_WriteNewChunkWithTagsToNAND(struct yaffs_DeviceStruct *dev,
923 yaffs_ExtendedTags *tags,
930 yaffs_InvalidateCheckpoint(dev);
933 yaffs_BlockInfo *bi = 0;
936 chunk = yaffs_AllocateChunk(dev, useReserve, &bi);
942 /* First check this chunk is erased, if it needs
943 * checking. The checking policy (unless forced
944 * always on) is as follows:
946 * Check the first page we try to write in a block.
947 * If the check passes then we don't need to check any
948 * more. If the check fails, we check again...
949 * If the block has been erased, we don't need to check.
951 * However, if the block has been prioritised for gc,
952 * then we think there might be something odd about
953 * this block and stop using it.
955 * Rationale: We should only ever see chunks that have
956 * not been erased if there was a partially written
957 * chunk due to power loss. This checking policy should
958 * catch that case with very few checks and thus save a
959 * lot of checks that are most likely not needed.
961 if (bi->gcPrioritise) {
962 yaffs_DeleteChunk(dev, chunk, 1, __LINE__);
963 /* try another chunk */
967 /* let's give it a try */
970 #ifdef CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED
971 bi->skipErasedCheck = 0;
973 if (!bi->skipErasedCheck) {
974 erasedOk = yaffs_CheckChunkErased(dev, chunk);
975 if (erasedOk != YAFFS_OK) {
977 (TSTR("**>> yaffs chunk %d was not erased"
980 /* try another chunk */
983 bi->skipErasedCheck = 1;
986 writeOk = yaffs_WriteChunkWithTagsToNAND(dev, chunk,
988 if (writeOk != YAFFS_OK) {
989 yaffs_HandleWriteChunkError(dev, chunk, erasedOk);
990 /* try another chunk */
994 /* Copy the data into the robustification buffer */
995 yaffs_HandleWriteChunkOk(dev, chunk, data, tags);
997 } while (writeOk != YAFFS_OK &&
998 (yaffs_wr_attempts <= 0 || attempts <= yaffs_wr_attempts));
1004 T(YAFFS_TRACE_ERROR,
1005 (TSTR("**>> yaffs write required %d attempts" TENDSTR),
1008 dev->nRetriedWrites += (attempts - 1);
1015 * Block retiring for handling a broken block.
1018 static void yaffs_RetireBlock(yaffs_Device *dev, int blockInNAND)
1020 yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND);
1022 yaffs_InvalidateCheckpoint(dev);
1024 if (yaffs_MarkBlockBad(dev, blockInNAND) != YAFFS_OK) {
1025 if (yaffs_EraseBlockInNAND(dev, blockInNAND) != YAFFS_OK) {
1026 T(YAFFS_TRACE_ALWAYS, (TSTR(
1027 "yaffs: Failed to mark bad and erase block %d"
1028 TENDSTR), blockInNAND));
1030 yaffs_ExtendedTags tags;
1031 int chunkId = blockInNAND * dev->nChunksPerBlock;
1033 __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__);
1035 memset(buffer, 0xff, dev->nDataBytesPerChunk);
1036 yaffs_InitialiseTags(&tags);
1037 tags.sequenceNumber = YAFFS_SEQUENCE_BAD_BLOCK;
1038 if (dev->writeChunkWithTagsToNAND(dev, chunkId -
1039 dev->chunkOffset, buffer, &tags) != YAFFS_OK)
1040 T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Failed to "
1041 TCONT("write bad block marker to block %d")
1042 TENDSTR), blockInNAND));
1044 yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
1048 bi->blockState = YAFFS_BLOCK_STATE_DEAD;
1049 bi->gcPrioritise = 0;
1050 bi->needsRetiring = 0;
1052 dev->nRetiredBlocks++;
1056 * Functions for robustisizing TODO
1060 static void yaffs_HandleWriteChunkOk(yaffs_Device *dev, int chunkInNAND,
1062 const yaffs_ExtendedTags *tags)
1066 static void yaffs_HandleUpdateChunk(yaffs_Device *dev, int chunkInNAND,
1067 const yaffs_ExtendedTags *tags)
1071 void yaffs_HandleChunkError(yaffs_Device *dev, yaffs_BlockInfo *bi)
1073 if (!bi->gcPrioritise) {
1074 bi->gcPrioritise = 1;
1075 dev->hasPendingPrioritisedGCs = 1;
1076 bi->chunkErrorStrikes++;
1078 if (bi->chunkErrorStrikes > 3) {
1079 bi->needsRetiring = 1; /* Too many stikes, so retire this */
1080 T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Block struck out" TENDSTR)));
1086 static void yaffs_HandleWriteChunkError(yaffs_Device *dev, int chunkInNAND,
1089 int blockInNAND = chunkInNAND / dev->nChunksPerBlock;
1090 yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND);
1092 yaffs_HandleChunkError(dev, bi);
1095 /* Was an actual write failure, so mark the block for retirement */
1096 bi->needsRetiring = 1;
1097 T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
1098 (TSTR("**>> Block %d needs retiring" TENDSTR), blockInNAND));
1101 /* Delete the chunk */
1102 yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__);
1106 /*---------------- Name handling functions ------------*/
1108 static __u16 yaffs_CalcNameSum(const YCHAR *name)
1113 const YUCHAR *bname = (const YUCHAR *) name;
1115 while ((*bname) && (i < (YAFFS_MAX_NAME_LENGTH/2))) {
1117 #ifdef CONFIG_YAFFS_CASE_INSENSITIVE
1118 sum += yaffs_toupper(*bname) * i;
1120 sum += (*bname) * i;
1129 static void yaffs_SetObjectName(yaffs_Object *obj, const YCHAR *name)
1131 #ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM
1132 memset(obj->shortName, 0, sizeof(YCHAR) * (YAFFS_SHORT_NAME_LENGTH+1));
1133 if (name && yaffs_strlen(name) <= YAFFS_SHORT_NAME_LENGTH)
1134 yaffs_strcpy(obj->shortName, name);
1136 obj->shortName[0] = _Y('\0');
1138 obj->sum = yaffs_CalcNameSum(name);
1141 /*-------------------- TNODES -------------------
1143 * List of spare tnodes
1144 * The list is hooked together using the first pointer
1148 /* yaffs_CreateTnodes creates a bunch more tnodes and
1149 * adds them to the tnode free list.
1150 * Don't use this function directly
1153 static int yaffs_CreateTnodes(yaffs_Device *dev, int nTnodes)
1157 yaffs_Tnode *newTnodes;
1161 yaffs_TnodeList *tnl;
1166 /* Calculate the tnode size in bytes for variable width tnode support.
1167 * Must be a multiple of 32-bits */
1168 tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
1170 if (tnodeSize < sizeof(yaffs_Tnode))
1171 tnodeSize = sizeof(yaffs_Tnode);
1173 /* make these things */
1175 newTnodes = YMALLOC(nTnodes * tnodeSize);
1176 mem = (__u8 *)newTnodes;
1179 T(YAFFS_TRACE_ERROR,
1180 (TSTR("yaffs: Could not allocate Tnodes" TENDSTR)));
1184 /* Hook them into the free list */
1186 for (i = 0; i < nTnodes - 1; i++) {
1187 newTnodes[i].internal[0] = &newTnodes[i + 1];
1188 #ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
1189 newTnodes[i].internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
1193 newTnodes[nTnodes - 1].internal[0] = dev->freeTnodes;
1194 #ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
1195 newTnodes[nTnodes - 1].internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
1197 dev->freeTnodes = newTnodes;
1199 /* New hookup for wide tnodes */
1200 for (i = 0; i < nTnodes - 1; i++) {
1201 curr = (yaffs_Tnode *) &mem[i * tnodeSize];
1202 next = (yaffs_Tnode *) &mem[(i+1) * tnodeSize];
1203 curr->internal[0] = next;
1206 curr = (yaffs_Tnode *) &mem[(nTnodes - 1) * tnodeSize];
1207 curr->internal[0] = dev->freeTnodes;
1208 dev->freeTnodes = (yaffs_Tnode *)mem;
1213 dev->nFreeTnodes += nTnodes;
1214 dev->nTnodesCreated += nTnodes;
1216 /* Now add this bunch of tnodes to a list for freeing up.
1217 * NB If we can't add this to the management list it isn't fatal
1218 * but it just means we can't free this bunch of tnodes later.
1221 tnl = YMALLOC(sizeof(yaffs_TnodeList));
1223 T(YAFFS_TRACE_ERROR,
1225 ("yaffs: Could not add tnodes to management list" TENDSTR)));
1228 tnl->tnodes = newTnodes;
1229 tnl->next = dev->allocatedTnodeList;
1230 dev->allocatedTnodeList = tnl;
1233 T(YAFFS_TRACE_ALLOCATE, (TSTR("yaffs: Tnodes added" TENDSTR)));
1238 /* GetTnode gets us a clean tnode. Tries to make allocate more if we run out */
1240 static yaffs_Tnode *yaffs_GetTnodeRaw(yaffs_Device *dev)
1242 yaffs_Tnode *tn = NULL;
1244 /* If there are none left make more */
1245 if (!dev->freeTnodes)
1246 yaffs_CreateTnodes(dev, YAFFS_ALLOCATION_NTNODES);
1248 if (dev->freeTnodes) {
1249 tn = dev->freeTnodes;
1250 #ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
1251 if (tn->internal[YAFFS_NTNODES_INTERNAL] != (void *)1) {
1252 /* Hoosterman, this thing looks like it isn't in the list */
1253 T(YAFFS_TRACE_ALWAYS,
1254 (TSTR("yaffs: Tnode list bug 1" TENDSTR)));
1257 dev->freeTnodes = dev->freeTnodes->internal[0];
1261 dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
1266 static yaffs_Tnode *yaffs_GetTnode(yaffs_Device *dev)
1268 yaffs_Tnode *tn = yaffs_GetTnodeRaw(dev);
1269 int tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
1271 if (tnodeSize < sizeof(yaffs_Tnode))
1272 tnodeSize = sizeof(yaffs_Tnode);
1275 memset(tn, 0, tnodeSize);
1280 /* FreeTnode frees up a tnode and puts it back on the free list */
1281 static void yaffs_FreeTnode(yaffs_Device *dev, yaffs_Tnode *tn)
1284 #ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
1285 if (tn->internal[YAFFS_NTNODES_INTERNAL] != 0) {
1286 /* Hoosterman, this thing looks like it is already in the list */
1287 T(YAFFS_TRACE_ALWAYS,
1288 (TSTR("yaffs: Tnode list bug 2" TENDSTR)));
1290 tn->internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
1292 tn->internal[0] = dev->freeTnodes;
1293 dev->freeTnodes = tn;
1296 dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
1299 static void yaffs_DeinitialiseTnodes(yaffs_Device *dev)
1301 /* Free the list of allocated tnodes */
1302 yaffs_TnodeList *tmp;
1304 while (dev->allocatedTnodeList) {
1305 tmp = dev->allocatedTnodeList->next;
1307 YFREE(dev->allocatedTnodeList->tnodes);
1308 YFREE(dev->allocatedTnodeList);
1309 dev->allocatedTnodeList = tmp;
1313 dev->freeTnodes = NULL;
1314 dev->nFreeTnodes = 0;
1317 static void yaffs_InitialiseTnodes(yaffs_Device *dev)
1319 dev->allocatedTnodeList = NULL;
1320 dev->freeTnodes = NULL;
1321 dev->nFreeTnodes = 0;
1322 dev->nTnodesCreated = 0;
1326 void yaffs_LoadLevel0Tnode(yaffs_Device *dev, yaffs_Tnode *tn, unsigned pos,
1329 __u32 *map = (__u32 *)tn;
1335 pos &= YAFFS_TNODES_LEVEL0_MASK;
1336 val >>= dev->chunkGroupBits;
1338 bitInMap = pos * dev->tnodeWidth;
1339 wordInMap = bitInMap / 32;
1340 bitInWord = bitInMap & (32 - 1);
1342 mask = dev->tnodeMask << bitInWord;
1344 map[wordInMap] &= ~mask;
1345 map[wordInMap] |= (mask & (val << bitInWord));
1347 if (dev->tnodeWidth > (32 - bitInWord)) {
1348 bitInWord = (32 - bitInWord);
1350 mask = dev->tnodeMask >> (/*dev->tnodeWidth -*/ bitInWord);
1351 map[wordInMap] &= ~mask;
1352 map[wordInMap] |= (mask & (val >> bitInWord));
1356 static __u32 yaffs_GetChunkGroupBase(yaffs_Device *dev, yaffs_Tnode *tn,
1359 __u32 *map = (__u32 *)tn;
1365 pos &= YAFFS_TNODES_LEVEL0_MASK;
1367 bitInMap = pos * dev->tnodeWidth;
1368 wordInMap = bitInMap / 32;
1369 bitInWord = bitInMap & (32 - 1);
1371 val = map[wordInMap] >> bitInWord;
1373 if (dev->tnodeWidth > (32 - bitInWord)) {
1374 bitInWord = (32 - bitInWord);
1376 val |= (map[wordInMap] << bitInWord);
1379 val &= dev->tnodeMask;
1380 val <<= dev->chunkGroupBits;
1385 /* ------------------- End of individual tnode manipulation -----------------*/
1387 /* ---------Functions to manipulate the look-up tree (made up of tnodes) ------
1388 * The look up tree is represented by the top tnode and the number of topLevel
1389 * in the tree. 0 means only the level 0 tnode is in the tree.
1392 /* FindLevel0Tnode finds the level 0 tnode, if one exists. */
1393 static yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device *dev,
1394 yaffs_FileStructure *fStruct,
1397 yaffs_Tnode *tn = fStruct->top;
1399 int requiredTallness;
1400 int level = fStruct->topLevel;
1402 /* Check sane level and chunk Id */
1403 if (level < 0 || level > YAFFS_TNODES_MAX_LEVEL)
1406 if (chunkId > YAFFS_MAX_CHUNK_ID)
1409 /* First check we're tall enough (ie enough topLevel) */
1411 i = chunkId >> YAFFS_TNODES_LEVEL0_BITS;
1412 requiredTallness = 0;
1414 i >>= YAFFS_TNODES_INTERNAL_BITS;
1418 if (requiredTallness > fStruct->topLevel)
1419 return NULL; /* Not tall enough, so we can't find it */
1421 /* Traverse down to level 0 */
1422 while (level > 0 && tn) {
1423 tn = tn->internal[(chunkId >>
1424 (YAFFS_TNODES_LEVEL0_BITS +
1426 YAFFS_TNODES_INTERNAL_BITS)) &
1427 YAFFS_TNODES_INTERNAL_MASK];
1434 /* AddOrFindLevel0Tnode finds the level 0 tnode if it exists, otherwise first expands the tree.
1435 * This happens in two steps:
1436 * 1. If the tree isn't tall enough, then make it taller.
1437 * 2. Scan down the tree towards the level 0 tnode adding tnodes if required.
1439 * Used when modifying the tree.
1441 * If the tn argument is NULL, then a fresh tnode will be added otherwise the specified tn will
1442 * be plugged into the ttree.
1445 static yaffs_Tnode *yaffs_AddOrFindLevel0Tnode(yaffs_Device *dev,
1446 yaffs_FileStructure *fStruct,
1448 yaffs_Tnode *passedTn)
1450 int requiredTallness;
1458 /* Check sane level and page Id */
1459 if (fStruct->topLevel < 0 || fStruct->topLevel > YAFFS_TNODES_MAX_LEVEL)
1462 if (chunkId > YAFFS_MAX_CHUNK_ID)
1465 /* First check we're tall enough (ie enough topLevel) */
1467 x = chunkId >> YAFFS_TNODES_LEVEL0_BITS;
1468 requiredTallness = 0;
1470 x >>= YAFFS_TNODES_INTERNAL_BITS;
1475 if (requiredTallness > fStruct->topLevel) {
1476 /* Not tall enough, gotta make the tree taller */
1477 for (i = fStruct->topLevel; i < requiredTallness; i++) {
1479 tn = yaffs_GetTnode(dev);
1482 tn->internal[0] = fStruct->top;
1484 fStruct->topLevel++;
1486 T(YAFFS_TRACE_ERROR,
1487 (TSTR("yaffs: no more tnodes" TENDSTR)));
1493 /* Traverse down to level 0, adding anything we need */
1495 l = fStruct->topLevel;
1499 while (l > 0 && tn) {
1501 (YAFFS_TNODES_LEVEL0_BITS +
1502 (l - 1) * YAFFS_TNODES_INTERNAL_BITS)) &
1503 YAFFS_TNODES_INTERNAL_MASK;
1506 if ((l > 1) && !tn->internal[x]) {
1507 /* Add missing non-level-zero tnode */
1508 tn->internal[x] = yaffs_GetTnode(dev);
1509 if(!tn->internal[x])
1512 } else if (l == 1) {
1513 /* Looking from level 1 at level 0 */
1515 /* If we already have one, then release it.*/
1516 if (tn->internal[x])
1517 yaffs_FreeTnode(dev, tn->internal[x]);
1518 tn->internal[x] = passedTn;
1520 } else if (!tn->internal[x]) {
1521 /* Don't have one, none passed in */
1522 tn->internal[x] = yaffs_GetTnode(dev);
1523 if(!tn->internal[x])
1528 tn = tn->internal[x];
1532 /* top is level 0 */
1534 memcpy(tn, passedTn, (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8);
1535 yaffs_FreeTnode(dev, passedTn);
1542 static int yaffs_FindChunkInGroup(yaffs_Device *dev, int theChunk,
1543 yaffs_ExtendedTags *tags, int objectId,
1548 for (j = 0; theChunk && j < dev->chunkGroupSize; j++) {
1549 if (yaffs_CheckChunkBit(dev, theChunk / dev->nChunksPerBlock,
1550 theChunk % dev->nChunksPerBlock)) {
1552 if(dev->chunkGroupSize == 1)
1555 yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL,
1557 if (yaffs_TagsMatch(tags, objectId, chunkInInode)) {
1569 /* DeleteWorker scans backwards through the tnode tree and deletes all the
1570 * chunks and tnodes in the file
1571 * Returns 1 if the tree was deleted.
1572 * Returns 0 if it stopped early due to hitting the limit and the delete is incomplete.
1575 static int yaffs_DeleteWorker(yaffs_Object *in, yaffs_Tnode *tn, __u32 level,
1576 int chunkOffset, int *limit)
1581 yaffs_ExtendedTags tags;
1583 yaffs_Device *dev = in->myDev;
1589 for (i = YAFFS_NTNODES_INTERNAL - 1; allDone && i >= 0;
1591 if (tn->internal[i]) {
1592 if (limit && (*limit) < 0) {
1596 yaffs_DeleteWorker(in,
1604 YAFFS_TNODES_INTERNAL_BITS)
1609 yaffs_FreeTnode(dev,
1612 tn->internal[i] = NULL;
1616 return (allDone) ? 1 : 0;
1617 } else if (level == 0) {
1620 for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0 && !hitLimit;
1622 theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
1625 chunkInInode = (chunkOffset <<
1626 YAFFS_TNODES_LEVEL0_BITS) + i;
1629 yaffs_FindChunkInGroup(dev,
1635 if (foundChunk > 0) {
1636 yaffs_DeleteChunk(dev,
1641 *limit = *limit - 1;
1648 yaffs_LoadLevel0Tnode(dev, tn, i, 0);
1652 return (i < 0) ? 1 : 0;
1662 static void yaffs_SoftDeleteChunk(yaffs_Device *dev, int chunk)
1664 yaffs_BlockInfo *theBlock;
1666 T(YAFFS_TRACE_DELETION, (TSTR("soft delete chunk %d" TENDSTR), chunk));
1668 theBlock = yaffs_GetBlockInfo(dev, chunk / dev->nChunksPerBlock);
1670 theBlock->softDeletions++;
1675 /* SoftDeleteWorker scans backwards through the tnode tree and soft deletes all the chunks in the file.
1676 * All soft deleting does is increment the block's softdelete count and pulls the chunk out
1678 * Thus, essentially this is the same as DeleteWorker except that the chunks are soft deleted.
1681 static int yaffs_SoftDeleteWorker(yaffs_Object *in, yaffs_Tnode *tn,
1682 __u32 level, int chunkOffset)
1687 yaffs_Device *dev = in->myDev;
1692 for (i = YAFFS_NTNODES_INTERNAL - 1; allDone && i >= 0;
1694 if (tn->internal[i]) {
1696 yaffs_SoftDeleteWorker(in,
1702 YAFFS_TNODES_INTERNAL_BITS)
1705 yaffs_FreeTnode(dev,
1708 tn->internal[i] = NULL;
1710 /* Hoosterman... how could this happen? */
1714 return (allDone) ? 1 : 0;
1715 } else if (level == 0) {
1717 for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0; i--) {
1718 theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
1720 /* Note this does not find the real chunk, only the chunk group.
1721 * We make an assumption that a chunk group is not larger than
1724 yaffs_SoftDeleteChunk(dev, theChunk);
1725 yaffs_LoadLevel0Tnode(dev, tn, i, 0);
1739 static void yaffs_SoftDeleteFile(yaffs_Object *obj)
1742 obj->variantType == YAFFS_OBJECT_TYPE_FILE && !obj->softDeleted) {
1743 if (obj->nDataChunks <= 0) {
1744 /* Empty file with no duplicate object headers, just delete it immediately */
1745 yaffs_FreeTnode(obj->myDev,
1746 obj->variant.fileVariant.top);
1747 obj->variant.fileVariant.top = NULL;
1748 T(YAFFS_TRACE_TRACING,
1749 (TSTR("yaffs: Deleting empty file %d" TENDSTR),
1751 yaffs_DoGenericObjectDeletion(obj);
1753 yaffs_SoftDeleteWorker(obj,
1754 obj->variant.fileVariant.top,
1755 obj->variant.fileVariant.
1757 obj->softDeleted = 1;
1762 /* Pruning removes any part of the file structure tree that is beyond the
1763 * bounds of the file (ie that does not point to chunks).
1765 * A file should only get pruned when its size is reduced.
1767 * Before pruning, the chunks must be pulled from the tree and the
1768 * level 0 tnode entries must be zeroed out.
1769 * Could also use this for file deletion, but that's probably better handled
1770 * by a special case.
1773 static yaffs_Tnode *yaffs_PruneWorker(yaffs_Device *dev, yaffs_Tnode *tn,
1774 __u32 level, int del0)
1782 for (i = 0; i < YAFFS_NTNODES_INTERNAL; i++) {
1783 if (tn->internal[i] && level > 0) {
1785 yaffs_PruneWorker(dev, tn->internal[i],
1787 (i == 0) ? del0 : 1);
1790 if (tn->internal[i])
1794 if (hasData == 0 && del0) {
1795 /* Free and return NULL */
1797 yaffs_FreeTnode(dev, tn);
1807 static int yaffs_PruneFileStructure(yaffs_Device *dev,
1808 yaffs_FileStructure *fStruct)
1815 if (fStruct->topLevel > 0) {
1817 yaffs_PruneWorker(dev, fStruct->top, fStruct->topLevel, 0);
1819 /* Now we have a tree with all the non-zero branches NULL but the height
1820 * is the same as it was.
1821 * Let's see if we can trim internal tnodes to shorten the tree.
1822 * We can do this if only the 0th element in the tnode is in use
1823 * (ie all the non-zero are NULL)
1826 while (fStruct->topLevel && !done) {
1830 for (i = 1; i < YAFFS_NTNODES_INTERNAL; i++) {
1831 if (tn->internal[i])
1836 fStruct->top = tn->internal[0];
1837 fStruct->topLevel--;
1838 yaffs_FreeTnode(dev, tn);
1848 /*-------------------- End of File Structure functions.-------------------*/
1850 /* yaffs_CreateFreeObjects creates a bunch more objects and
1851 * adds them to the object free list.
1853 static int yaffs_CreateFreeObjects(yaffs_Device *dev, int nObjects)
1856 yaffs_Object *newObjects;
1857 yaffs_ObjectList *list;
1862 /* make these things */
1863 newObjects = YMALLOC(nObjects * sizeof(yaffs_Object));
1864 list = YMALLOC(sizeof(yaffs_ObjectList));
1866 if (!newObjects || !list) {
1871 T(YAFFS_TRACE_ALLOCATE,
1872 (TSTR("yaffs: Could not allocate more objects" TENDSTR)));
1876 /* Hook them into the free list */
1877 for (i = 0; i < nObjects - 1; i++) {
1878 newObjects[i].siblings.next =
1879 (struct ylist_head *)(&newObjects[i + 1]);
1882 newObjects[nObjects - 1].siblings.next = (void *)dev->freeObjects;
1883 dev->freeObjects = newObjects;
1884 dev->nFreeObjects += nObjects;
1885 dev->nObjectsCreated += nObjects;
1887 /* Now add this bunch of Objects to a list for freeing up. */
1889 list->objects = newObjects;
1890 list->next = dev->allocatedObjectList;
1891 dev->allocatedObjectList = list;
1897 /* AllocateEmptyObject gets us a clean Object. Tries to make allocate more if we run out */
1898 static yaffs_Object *yaffs_AllocateEmptyObject(yaffs_Device *dev)
1900 yaffs_Object *tn = NULL;
1902 #ifdef VALGRIND_TEST
1903 tn = YMALLOC(sizeof(yaffs_Object));
1905 /* If there are none left make more */
1906 if (!dev->freeObjects)
1907 yaffs_CreateFreeObjects(dev, YAFFS_ALLOCATION_NOBJECTS);
1909 if (dev->freeObjects) {
1910 tn = dev->freeObjects;
1912 (yaffs_Object *) (dev->freeObjects->siblings.next);
1913 dev->nFreeObjects--;
1917 /* Now sweeten it up... */
1919 memset(tn, 0, sizeof(yaffs_Object));
1920 tn->beingCreated = 1;
1924 tn->variantType = YAFFS_OBJECT_TYPE_UNKNOWN;
1925 YINIT_LIST_HEAD(&(tn->hardLinks));
1926 YINIT_LIST_HEAD(&(tn->hashLink));
1927 YINIT_LIST_HEAD(&tn->siblings);
1930 /* Now make the directory sane */
1932 tn->parent = dev->rootDir;
1933 ylist_add(&(tn->siblings), &dev->rootDir->variant.directoryVariant.children);
1936 /* Add it to the lost and found directory.
1937 * NB Can't put root or lostNFound in lostNFound so
1938 * check if lostNFound exists first
1940 if (dev->lostNFoundDir)
1941 yaffs_AddObjectToDirectory(dev->lostNFoundDir, tn);
1943 tn->beingCreated = 0;
1946 dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
1951 static yaffs_Object *yaffs_CreateFakeDirectory(yaffs_Device *dev, int number,
1956 yaffs_CreateNewObject(dev, number, YAFFS_OBJECT_TYPE_DIRECTORY);
1958 obj->fake = 1; /* it is fake so it might have no NAND presence... */
1959 obj->renameAllowed = 0; /* ... and we're not allowed to rename it... */
1960 obj->unlinkAllowed = 0; /* ... or unlink it */
1963 obj->yst_mode = mode;
1965 obj->hdrChunk = 0; /* Not a valid chunk. */
1972 static void yaffs_UnhashObject(yaffs_Object *tn)
1975 yaffs_Device *dev = tn->myDev;
1977 /* If it is still linked into the bucket list, free from the list */
1978 if (!ylist_empty(&tn->hashLink)) {
1979 ylist_del_init(&tn->hashLink);
1980 bucket = yaffs_HashFunction(tn->objectId);
1981 dev->objectBucket[bucket].count--;
1985 /* FreeObject frees up a Object and puts it back on the free list */
1986 static void yaffs_FreeObject(yaffs_Object *tn)
1988 yaffs_Device *dev = tn->myDev;
1991 T(YAFFS_TRACE_OS, (TSTR("FreeObject %p inode %p"TENDSTR), tn, tn->myInode));
1996 if (!ylist_empty(&tn->siblings))
2002 /* We're still hooked up to a cached inode.
2003 * Don't delete now, but mark for later deletion
2005 tn->deferedFree = 1;
2010 yaffs_UnhashObject(tn);
2012 #ifdef VALGRIND_TEST
2015 /* Link into the free list. */
2016 tn->siblings.next = (struct ylist_head *)(dev->freeObjects);
2017 dev->freeObjects = tn;
2018 dev->nFreeObjects++;
2020 dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
2025 void yaffs_HandleDeferedFree(yaffs_Object *obj)
2027 if (obj->deferedFree)
2028 yaffs_FreeObject(obj);
2033 static void yaffs_DeinitialiseObjects(yaffs_Device *dev)
2035 /* Free the list of allocated Objects */
2037 yaffs_ObjectList *tmp;
2039 while (dev->allocatedObjectList) {
2040 tmp = dev->allocatedObjectList->next;
2041 YFREE(dev->allocatedObjectList->objects);
2042 YFREE(dev->allocatedObjectList);
2044 dev->allocatedObjectList = tmp;
2047 dev->freeObjects = NULL;
2048 dev->nFreeObjects = 0;
2051 static void yaffs_InitialiseObjects(yaffs_Device *dev)
2055 dev->allocatedObjectList = NULL;
2056 dev->freeObjects = NULL;
2057 dev->nFreeObjects = 0;
2059 for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
2060 YINIT_LIST_HEAD(&dev->objectBucket[i].list);
2061 dev->objectBucket[i].count = 0;
2065 static int yaffs_FindNiceObjectBucket(yaffs_Device *dev)
2070 int lowest = 999999;
2072 /* First let's see if we can find one that's empty. */
2074 for (i = 0; i < 10 && lowest > 0; i++) {
2076 x %= YAFFS_NOBJECT_BUCKETS;
2077 if (dev->objectBucket[x].count < lowest) {
2078 lowest = dev->objectBucket[x].count;
2084 /* If we didn't find an empty list, then try
2085 * looking a bit further for a short one
2088 for (i = 0; i < 10 && lowest > 3; i++) {
2090 x %= YAFFS_NOBJECT_BUCKETS;
2091 if (dev->objectBucket[x].count < lowest) {
2092 lowest = dev->objectBucket[x].count;
2101 static int yaffs_CreateNewObjectNumber(yaffs_Device *dev)
2103 int bucket = yaffs_FindNiceObjectBucket(dev);
2105 /* Now find an object value that has not already been taken
2106 * by scanning the list.
2110 struct ylist_head *i;
2112 __u32 n = (__u32) bucket;
2114 /* yaffs_CheckObjectHashSanity(); */
2118 n += YAFFS_NOBJECT_BUCKETS;
2119 if (1 || dev->objectBucket[bucket].count > 0) {
2120 ylist_for_each(i, &dev->objectBucket[bucket].list) {
2121 /* If there is already one in the list */
2122 if (i && ylist_entry(i, yaffs_Object,
2123 hashLink)->objectId == n) {
2133 static void yaffs_HashObject(yaffs_Object *in)
2135 int bucket = yaffs_HashFunction(in->objectId);
2136 yaffs_Device *dev = in->myDev;
2138 ylist_add(&in->hashLink, &dev->objectBucket[bucket].list);
2139 dev->objectBucket[bucket].count++;
2142 yaffs_Object *yaffs_FindObjectByNumber(yaffs_Device *dev, __u32 number)
2144 int bucket = yaffs_HashFunction(number);
2145 struct ylist_head *i;
2148 ylist_for_each(i, &dev->objectBucket[bucket].list) {
2149 /* Look if it is in the list */
2151 in = ylist_entry(i, yaffs_Object, hashLink);
2152 if (in->objectId == number) {
2154 /* Don't tell the VFS about this one if it is defered free */
2155 if (in->deferedFree)
2167 yaffs_Object *yaffs_CreateNewObject(yaffs_Device *dev, int number,
2168 yaffs_ObjectType type)
2170 yaffs_Object *theObject;
2171 yaffs_Tnode *tn = NULL;
2174 number = yaffs_CreateNewObjectNumber(dev);
2176 if (type == YAFFS_OBJECT_TYPE_FILE) {
2177 tn = yaffs_GetTnode(dev);
2182 theObject = yaffs_AllocateEmptyObject(dev);
2185 yaffs_FreeTnode(dev,tn);
2191 theObject->fake = 0;
2192 theObject->renameAllowed = 1;
2193 theObject->unlinkAllowed = 1;
2194 theObject->objectId = number;
2195 yaffs_HashObject(theObject);
2196 theObject->variantType = type;
2197 #ifdef CONFIG_YAFFS_WINCE
2198 yfsd_WinFileTimeNow(theObject->win_atime);
2199 theObject->win_ctime[0] = theObject->win_mtime[0] =
2200 theObject->win_atime[0];
2201 theObject->win_ctime[1] = theObject->win_mtime[1] =
2202 theObject->win_atime[1];
2206 theObject->yst_atime = theObject->yst_mtime =
2207 theObject->yst_ctime = Y_CURRENT_TIME;
2210 case YAFFS_OBJECT_TYPE_FILE:
2211 theObject->variant.fileVariant.fileSize = 0;
2212 theObject->variant.fileVariant.scannedFileSize = 0;
2213 theObject->variant.fileVariant.shrinkSize = 0xFFFFFFFF; /* max __u32 */
2214 theObject->variant.fileVariant.topLevel = 0;
2215 theObject->variant.fileVariant.top = tn;
2217 case YAFFS_OBJECT_TYPE_DIRECTORY:
2218 YINIT_LIST_HEAD(&theObject->variant.directoryVariant.
2221 case YAFFS_OBJECT_TYPE_SYMLINK:
2222 case YAFFS_OBJECT_TYPE_HARDLINK:
2223 case YAFFS_OBJECT_TYPE_SPECIAL:
2224 /* No action required */
2226 case YAFFS_OBJECT_TYPE_UNKNOWN:
2227 /* todo this should not happen */
2235 static yaffs_Object *yaffs_FindOrCreateObjectByNumber(yaffs_Device *dev,
2237 yaffs_ObjectType type)
2239 yaffs_Object *theObject = NULL;
2242 theObject = yaffs_FindObjectByNumber(dev, number);
2245 theObject = yaffs_CreateNewObject(dev, number, type);
2252 static YCHAR *yaffs_CloneString(const YCHAR *str)
2254 YCHAR *newStr = NULL;
2257 newStr = YMALLOC((yaffs_strlen(str) + 1) * sizeof(YCHAR));
2259 yaffs_strcpy(newStr, str);
2267 * Mknod (create) a new object.
2268 * equivalentObject only has meaning for a hard link;
2269 * aliasString only has meaning for a sumlink.
2270 * rdev only has meaning for devices (a subset of special objects)
2273 static yaffs_Object *yaffs_MknodObject(yaffs_ObjectType type,
2274 yaffs_Object *parent,
2279 yaffs_Object *equivalentObject,
2280 const YCHAR *aliasString, __u32 rdev)
2285 yaffs_Device *dev = parent->myDev;
2287 /* Check if the entry exists. If it does then fail the call since we don't want a dup.*/
2288 if (yaffs_FindObjectByName(parent, name))
2291 if (type == YAFFS_OBJECT_TYPE_SYMLINK) {
2292 str = yaffs_CloneString(aliasString);
2297 in = yaffs_CreateNewObject(dev, -1, type);
2311 in->variantType = type;
2313 in->yst_mode = mode;
2315 #ifdef CONFIG_YAFFS_WINCE
2316 yfsd_WinFileTimeNow(in->win_atime);
2317 in->win_ctime[0] = in->win_mtime[0] = in->win_atime[0];
2318 in->win_ctime[1] = in->win_mtime[1] = in->win_atime[1];
2321 in->yst_atime = in->yst_mtime = in->yst_ctime = Y_CURRENT_TIME;
2323 in->yst_rdev = rdev;
2327 in->nDataChunks = 0;
2329 yaffs_SetObjectName(in, name);
2332 yaffs_AddObjectToDirectory(parent, in);
2334 in->myDev = parent->myDev;
2337 case YAFFS_OBJECT_TYPE_SYMLINK:
2338 in->variant.symLinkVariant.alias = str;
2340 case YAFFS_OBJECT_TYPE_HARDLINK:
2341 in->variant.hardLinkVariant.equivalentObject =
2343 in->variant.hardLinkVariant.equivalentObjectId =
2344 equivalentObject->objectId;
2345 ylist_add(&in->hardLinks, &equivalentObject->hardLinks);
2347 case YAFFS_OBJECT_TYPE_FILE:
2348 case YAFFS_OBJECT_TYPE_DIRECTORY:
2349 case YAFFS_OBJECT_TYPE_SPECIAL:
2350 case YAFFS_OBJECT_TYPE_UNKNOWN:
2355 if (yaffs_UpdateObjectHeader(in, name, 0, 0, 0) < 0) {
2356 /* Could not create the object header, fail the creation */
2357 yaffs_DeleteObject(in);
2361 yaffs_UpdateParent(parent);
2367 yaffs_Object *yaffs_MknodFile(yaffs_Object *parent, const YCHAR *name,
2368 __u32 mode, __u32 uid, __u32 gid)
2370 return yaffs_MknodObject(YAFFS_OBJECT_TYPE_FILE, parent, name, mode,
2371 uid, gid, NULL, NULL, 0);
2374 yaffs_Object *yaffs_MknodDirectory(yaffs_Object *parent, const YCHAR *name,
2375 __u32 mode, __u32 uid, __u32 gid)
2377 return yaffs_MknodObject(YAFFS_OBJECT_TYPE_DIRECTORY, parent, name,
2378 mode, uid, gid, NULL, NULL, 0);
2381 yaffs_Object *yaffs_MknodSpecial(yaffs_Object *parent, const YCHAR *name,
2382 __u32 mode, __u32 uid, __u32 gid, __u32 rdev)
2384 return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SPECIAL, parent, name, mode,
2385 uid, gid, NULL, NULL, rdev);
2388 yaffs_Object *yaffs_MknodSymLink(yaffs_Object *parent, const YCHAR *name,
2389 __u32 mode, __u32 uid, __u32 gid,
2392 return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SYMLINK, parent, name, mode,
2393 uid, gid, NULL, alias, 0);
2396 /* yaffs_Link returns the object id of the equivalent object.*/
2397 yaffs_Object *yaffs_Link(yaffs_Object *parent, const YCHAR *name,
2398 yaffs_Object *equivalentObject)
2400 /* Get the real object in case we were fed a hard link as an equivalent object */
2401 equivalentObject = yaffs_GetEquivalentObject(equivalentObject);
2403 if (yaffs_MknodObject
2404 (YAFFS_OBJECT_TYPE_HARDLINK, parent, name, 0, 0, 0,
2405 equivalentObject, NULL, 0)) {
2406 return equivalentObject;
2413 static int yaffs_ChangeObjectName(yaffs_Object *obj, yaffs_Object *newDir,
2414 const YCHAR *newName, int force, int shadows)
2419 yaffs_Object *existingTarget;
2422 newDir = obj->parent; /* use the old directory */
2424 if (newDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
2425 T(YAFFS_TRACE_ALWAYS,
2427 ("tragedy: yaffs_ChangeObjectName: newDir is not a directory"
2432 /* TODO: Do we need this different handling for YAFFS2 and YAFFS1?? */
2433 if (obj->myDev->isYaffs2)
2434 unlinkOp = (newDir == obj->myDev->unlinkedDir);
2436 unlinkOp = (newDir == obj->myDev->unlinkedDir
2437 && obj->variantType == YAFFS_OBJECT_TYPE_FILE);
2439 deleteOp = (newDir == obj->myDev->deletedDir);
2441 existingTarget = yaffs_FindObjectByName(newDir, newName);
2443 /* If the object is a file going into the unlinked directory,
2444 * then it is OK to just stuff it in since duplicate names are allowed.
2445 * else only proceed if the new name does not exist and if we're putting
2446 * it into a directory.
2453 newDir->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) {
2454 yaffs_SetObjectName(obj, newName);
2457 yaffs_AddObjectToDirectory(newDir, obj);
2462 /* If it is a deletion then we mark it as a shrink for gc purposes. */
2463 if (yaffs_UpdateObjectHeader(obj, newName, 0, deleteOp, shadows) >= 0)
2470 int yaffs_RenameObject(yaffs_Object *oldDir, const YCHAR *oldName,
2471 yaffs_Object *newDir, const YCHAR *newName)
2473 yaffs_Object *obj = NULL;
2474 yaffs_Object *existingTarget = NULL;
2480 if (!oldDir || oldDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
2482 if (!newDir || newDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
2485 dev = oldDir->myDev;
2487 #ifdef CONFIG_YAFFS_CASE_INSENSITIVE
2488 /* Special case for case insemsitive systems (eg. WinCE).
2489 * While look-up is case insensitive, the name isn't.
2490 * Therefore we might want to change x.txt to X.txt
2492 if (oldDir == newDir && yaffs_strcmp(oldName, newName) == 0)
2496 if(yaffs_strlen(newName) > YAFFS_MAX_NAME_LENGTH)
2500 obj = yaffs_FindObjectByName(oldDir, oldName);
2502 if (obj && obj->renameAllowed) {
2504 /* Now do the handling for an existing target, if there is one */
2506 existingTarget = yaffs_FindObjectByName(newDir, newName);
2507 if (existingTarget &&
2508 existingTarget->variantType == YAFFS_OBJECT_TYPE_DIRECTORY &&
2509 !ylist_empty(&existingTarget->variant.directoryVariant.children)) {
2510 /* There is a target that is a non-empty directory, so we fail */
2511 return YAFFS_FAIL; /* EEXIST or ENOTEMPTY */
2512 } else if (existingTarget && existingTarget != obj) {
2513 /* Nuke the target first, using shadowing,
2514 * but only if it isn't the same object.
2516 * Note we must disable gc otherwise it can mess up the shadowing.
2520 yaffs_ChangeObjectName(obj, newDir, newName, force,
2521 existingTarget->objectId);
2522 existingTarget->isShadowed = 1;
2523 yaffs_UnlinkObject(existingTarget);
2527 result = yaffs_ChangeObjectName(obj, newDir, newName, 1, 0);
2529 yaffs_UpdateParent(oldDir);
2530 if(newDir != oldDir)
2531 yaffs_UpdateParent(newDir);
2538 /*------------------------- Block Management and Page Allocation ----------------*/
2540 static int yaffs_InitialiseBlocks(yaffs_Device *dev)
2542 int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1;
2544 dev->blockInfo = NULL;
2545 dev->chunkBits = NULL;
2547 dev->allocationBlock = -1; /* force it to get a new one */
2549 /* If the first allocation strategy fails, thry the alternate one */
2550 dev->blockInfo = YMALLOC(nBlocks * sizeof(yaffs_BlockInfo));
2551 if (!dev->blockInfo) {
2552 dev->blockInfo = YMALLOC_ALT(nBlocks * sizeof(yaffs_BlockInfo));
2553 dev->blockInfoAlt = 1;
2555 dev->blockInfoAlt = 0;
2557 if (dev->blockInfo) {
2558 /* Set up dynamic blockinfo stuff. */
2559 dev->chunkBitmapStride = (dev->nChunksPerBlock + 7) / 8; /* round up bytes */
2560 dev->chunkBits = YMALLOC(dev->chunkBitmapStride * nBlocks);
2561 if (!dev->chunkBits) {
2562 dev->chunkBits = YMALLOC_ALT(dev->chunkBitmapStride * nBlocks);
2563 dev->chunkBitsAlt = 1;
2565 dev->chunkBitsAlt = 0;
2568 if (dev->blockInfo && dev->chunkBits) {
2569 memset(dev->blockInfo, 0, nBlocks * sizeof(yaffs_BlockInfo));
2570 memset(dev->chunkBits, 0, dev->chunkBitmapStride * nBlocks);
2577 static void yaffs_DeinitialiseBlocks(yaffs_Device *dev)
2579 if (dev->blockInfoAlt && dev->blockInfo)
2580 YFREE_ALT(dev->blockInfo);
2581 else if (dev->blockInfo)
2582 YFREE(dev->blockInfo);
2584 dev->blockInfoAlt = 0;
2586 dev->blockInfo = NULL;
2588 if (dev->chunkBitsAlt && dev->chunkBits)
2589 YFREE_ALT(dev->chunkBits);
2590 else if (dev->chunkBits)
2591 YFREE(dev->chunkBits);
2592 dev->chunkBitsAlt = 0;
2593 dev->chunkBits = NULL;
2596 static int yaffs_BlockNotDisqualifiedFromGC(yaffs_Device *dev,
2597 yaffs_BlockInfo *bi)
2604 return 1; /* disqualification only applies to yaffs2. */
2606 if (!bi->hasShrinkHeader)
2607 return 1; /* can gc */
2609 /* Find the oldest dirty sequence number if we don't know it and save it
2610 * so we don't have to keep recomputing it.
2612 if (!dev->oldestDirtySequence) {
2613 seq = dev->sequenceNumber;
2615 for (i = dev->internalStartBlock; i <= dev->internalEndBlock;
2617 b = yaffs_GetBlockInfo(dev, i);
2618 if (b->blockState == YAFFS_BLOCK_STATE_FULL &&
2619 (b->pagesInUse - b->softDeletions) <
2620 dev->nChunksPerBlock && b->sequenceNumber < seq) {
2621 seq = b->sequenceNumber;
2624 dev->oldestDirtySequence = seq;
2627 /* Can't do gc of this block if there are any blocks older than this one that have
2630 return (bi->sequenceNumber <= dev->oldestDirtySequence);
2633 /* FindDiretiestBlock is used to select the dirtiest block (or close enough)
2634 * for garbage collection.
2637 static int yaffs_FindBlockForGarbageCollection(yaffs_Device *dev,
2640 int b = dev->currentDirtyChecker;
2646 int prioritised = 0;
2647 yaffs_BlockInfo *bi;
2648 int pendingPrioritisedExist = 0;
2650 /* First let's see if we need to grab a prioritised block */
2651 if (dev->hasPendingPrioritisedGCs) {
2652 for (i = dev->internalStartBlock; i < dev->internalEndBlock && !prioritised; i++) {
2654 bi = yaffs_GetBlockInfo(dev, i);
2655 /* yaffs_VerifyBlock(dev,bi,i); */
2657 if (bi->gcPrioritise) {
2658 pendingPrioritisedExist = 1;
2659 if (bi->blockState == YAFFS_BLOCK_STATE_FULL &&
2660 yaffs_BlockNotDisqualifiedFromGC(dev, bi)) {
2661 pagesInUse = (bi->pagesInUse - bi->softDeletions);
2664 aggressive = 1; /* Fool the non-aggressive skip logiv below */
2669 if (!pendingPrioritisedExist) /* None found, so we can clear this */
2670 dev->hasPendingPrioritisedGCs = 0;
2673 /* If we're doing aggressive GC then we are happy to take a less-dirty block, and
2675 * else (we're doing a leasurely gc), then we only bother to do this if the
2676 * block has only a few pages in use.
2679 dev->nonAggressiveSkip--;
2681 if (!aggressive && (dev->nonAggressiveSkip > 0))
2686 (aggressive) ? dev->nChunksPerBlock : YAFFS_PASSIVE_GC_CHUNKS + 1;
2690 dev->internalEndBlock - dev->internalStartBlock + 1;
2693 dev->internalEndBlock - dev->internalStartBlock + 1;
2694 iterations = iterations / 16;
2695 if (iterations > 200)
2699 for (i = 0; i <= iterations && pagesInUse > 0 && !prioritised; i++) {
2701 if (b < dev->internalStartBlock || b > dev->internalEndBlock)
2702 b = dev->internalStartBlock;
2704 if (b < dev->internalStartBlock || b > dev->internalEndBlock) {
2705 T(YAFFS_TRACE_ERROR,
2706 (TSTR("**>> Block %d is not valid" TENDSTR), b));
2710 bi = yaffs_GetBlockInfo(dev, b);
2712 if (bi->blockState == YAFFS_BLOCK_STATE_FULL &&
2713 (bi->pagesInUse - bi->softDeletions) < pagesInUse &&
2714 yaffs_BlockNotDisqualifiedFromGC(dev, bi)) {
2716 pagesInUse = (bi->pagesInUse - bi->softDeletions);
2720 dev->currentDirtyChecker = b;
2724 (TSTR("GC Selected block %d with %d free, prioritised:%d" TENDSTR), dirtiest,
2725 dev->nChunksPerBlock - pagesInUse, prioritised));
2728 dev->oldestDirtySequence = 0;
2731 dev->nonAggressiveSkip = 4;
2736 static void yaffs_BlockBecameDirty(yaffs_Device *dev, int blockNo)
2738 yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockNo);
2742 /* If the block is still healthy erase it and mark as clean.
2743 * If the block has had a data failure, then retire it.
2746 T(YAFFS_TRACE_GC | YAFFS_TRACE_ERASE,
2747 (TSTR("yaffs_BlockBecameDirty block %d state %d %s"TENDSTR),
2748 blockNo, bi->blockState, (bi->needsRetiring) ? "needs retiring" : ""));
2750 bi->blockState = YAFFS_BLOCK_STATE_DIRTY;
2752 if (!bi->needsRetiring) {
2753 yaffs_InvalidateCheckpoint(dev);
2754 erasedOk = yaffs_EraseBlockInNAND(dev, blockNo);
2756 dev->nErasureFailures++;
2757 T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
2758 (TSTR("**>> Erasure failed %d" TENDSTR), blockNo));
2763 ((yaffs_traceMask & YAFFS_TRACE_ERASE) || !yaffs_SkipVerification(dev))) {
2765 for (i = 0; i < dev->nChunksPerBlock; i++) {
2766 if (!yaffs_CheckChunkErased
2767 (dev, blockNo * dev->nChunksPerBlock + i)) {
2768 T(YAFFS_TRACE_ERROR,
2770 (">>Block %d erasure supposedly OK, but chunk %d not erased"
2771 TENDSTR), blockNo, i));
2777 /* Clean it up... */
2778 bi->blockState = YAFFS_BLOCK_STATE_EMPTY;
2779 dev->nErasedBlocks++;
2781 bi->softDeletions = 0;
2782 bi->hasShrinkHeader = 0;
2783 bi->skipErasedCheck = 1; /* This is clean, so no need to check */
2784 bi->gcPrioritise = 0;
2785 yaffs_ClearChunkBits(dev, blockNo);
2787 T(YAFFS_TRACE_ERASE,
2788 (TSTR("Erased block %d" TENDSTR), blockNo));
2790 dev->nFreeChunks -= dev->nChunksPerBlock; /* We lost a block of free space */
2792 yaffs_RetireBlock(dev, blockNo);
2793 T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
2794 (TSTR("**>> Block %d retired" TENDSTR), blockNo));
2798 static int yaffs_FindBlockForAllocation(yaffs_Device *dev)
2802 yaffs_BlockInfo *bi;
2804 if (dev->nErasedBlocks < 1) {
2805 /* Hoosterman we've got a problem.
2806 * Can't get space to gc
2808 T(YAFFS_TRACE_ERROR,
2809 (TSTR("yaffs tragedy: no more erased blocks" TENDSTR)));
2814 /* Find an empty block. */
2816 for (i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) {
2817 dev->allocationBlockFinder++;
2818 if (dev->allocationBlockFinder < dev->internalStartBlock
2819 || dev->allocationBlockFinder > dev->internalEndBlock) {
2820 dev->allocationBlockFinder = dev->internalStartBlock;
2823 bi = yaffs_GetBlockInfo(dev, dev->allocationBlockFinder);
2825 if (bi->blockState == YAFFS_BLOCK_STATE_EMPTY) {
2826 bi->blockState = YAFFS_BLOCK_STATE_ALLOCATING;
2827 dev->sequenceNumber++;
2828 bi->sequenceNumber = dev->sequenceNumber;
2829 dev->nErasedBlocks--;
2830 T(YAFFS_TRACE_ALLOCATE,
2831 (TSTR("Allocated block %d, seq %d, %d left" TENDSTR),
2832 dev->allocationBlockFinder, dev->sequenceNumber,
2833 dev->nErasedBlocks));
2834 return dev->allocationBlockFinder;
2838 T(YAFFS_TRACE_ALWAYS,
2840 ("yaffs tragedy: no more erased blocks, but there should have been %d"
2841 TENDSTR), dev->nErasedBlocks));
2848 static int yaffs_CalcCheckpointBlocksRequired(yaffs_Device *dev)
2850 if (!dev->nCheckpointBlocksRequired &&
2852 /* Not a valid value so recalculate */
2855 int devBlocks = (dev->endBlock - dev->startBlock + 1);
2858 tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
2860 if (tnodeSize < sizeof(yaffs_Tnode))
2861 tnodeSize = sizeof(yaffs_Tnode);
2863 nBytes += sizeof(yaffs_CheckpointValidity);
2864 nBytes += sizeof(yaffs_CheckpointDevice);
2865 nBytes += devBlocks * sizeof(yaffs_BlockInfo);
2866 nBytes += devBlocks * dev->chunkBitmapStride;
2867 nBytes += (sizeof(yaffs_CheckpointObject) + sizeof(__u32)) * (dev->nObjectsCreated - dev->nFreeObjects);
2868 nBytes += (tnodeSize + sizeof(__u32)) * (dev->nTnodesCreated - dev->nFreeTnodes);
2869 nBytes += sizeof(yaffs_CheckpointValidity);
2870 nBytes += sizeof(__u32); /* checksum*/
2872 /* Round up and add 2 blocks to allow for some bad blocks, so add 3 */
2874 nBlocks = (nBytes/(dev->nDataBytesPerChunk * dev->nChunksPerBlock)) + 3;
2876 dev->nCheckpointBlocksRequired = nBlocks;
2879 return dev->nCheckpointBlocksRequired;
2883 * Check if there's space to allocate...
2884 * Thinks.... do we need top make this ths same as yaffs_GetFreeChunks()?
2886 static int yaffs_CheckSpaceForAllocation(yaffs_Device *dev)
2889 int reservedBlocks = dev->nReservedBlocks;
2890 int checkpointBlocks;
2892 if (dev->isYaffs2) {
2893 checkpointBlocks = yaffs_CalcCheckpointBlocksRequired(dev) -
2894 dev->blocksInCheckpoint;
2895 if (checkpointBlocks < 0)
2896 checkpointBlocks = 0;
2898 checkpointBlocks = 0;
2901 reservedChunks = ((reservedBlocks + checkpointBlocks) * dev->nChunksPerBlock);
2903 return (dev->nFreeChunks > reservedChunks);
2906 static int yaffs_AllocateChunk(yaffs_Device *dev, int useReserve,
2907 yaffs_BlockInfo **blockUsedPtr)
2910 yaffs_BlockInfo *bi;
2912 if (dev->allocationBlock < 0) {
2913 /* Get next block to allocate off */
2914 dev->allocationBlock = yaffs_FindBlockForAllocation(dev);
2915 dev->allocationPage = 0;
2918 if (!useReserve && !yaffs_CheckSpaceForAllocation(dev)) {
2919 /* Not enough space to allocate unless we're allowed to use the reserve. */
2923 if (dev->nErasedBlocks < dev->nReservedBlocks
2924 && dev->allocationPage == 0) {
2925 T(YAFFS_TRACE_ALLOCATE, (TSTR("Allocating reserve" TENDSTR)));
2928 /* Next page please.... */
2929 if (dev->allocationBlock >= 0) {
2930 bi = yaffs_GetBlockInfo(dev, dev->allocationBlock);
2932 retVal = (dev->allocationBlock * dev->nChunksPerBlock) +
2933 dev->allocationPage;
2935 yaffs_SetChunkBit(dev, dev->allocationBlock,
2936 dev->allocationPage);
2938 dev->allocationPage++;
2942 /* If the block is full set the state to full */
2943 if (dev->allocationPage >= dev->nChunksPerBlock) {
2944 bi->blockState = YAFFS_BLOCK_STATE_FULL;
2945 dev->allocationBlock = -1;
2954 T(YAFFS_TRACE_ERROR,
2955 (TSTR("!!!!!!!!! Allocator out !!!!!!!!!!!!!!!!!" TENDSTR)));
2960 static int yaffs_GetErasedChunks(yaffs_Device *dev)
2964 n = dev->nErasedBlocks * dev->nChunksPerBlock;
2966 if (dev->allocationBlock > 0)
2967 n += (dev->nChunksPerBlock - dev->allocationPage);
2973 static int yaffs_GarbageCollectBlock(yaffs_Device *dev, int block,
2979 int retVal = YAFFS_OK;
2982 int isCheckpointBlock;
2986 int chunksBefore = yaffs_GetErasedChunks(dev);
2989 yaffs_ExtendedTags tags;
2991 yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, block);
2993 yaffs_Object *object;
2995 isCheckpointBlock = (bi->blockState == YAFFS_BLOCK_STATE_CHECKPOINT);
2998 T(YAFFS_TRACE_TRACING,
2999 (TSTR("Collecting block %d, in use %d, shrink %d, wholeBlock %d" TENDSTR),
3002 bi->hasShrinkHeader,
3005 /*yaffs_VerifyFreeChunks(dev); */
3007 if(bi->blockState == YAFFS_BLOCK_STATE_FULL)
3008 bi->blockState = YAFFS_BLOCK_STATE_COLLECTING;
3010 bi->hasShrinkHeader = 0; /* clear the flag so that the block can erase */
3012 /* Take off the number of soft deleted entries because
3013 * they're going to get really deleted during GC.
3015 if(dev->gcChunk == 0) /* first time through for this block */
3016 dev->nFreeChunks -= bi->softDeletions;
3020 if (isCheckpointBlock ||
3021 !yaffs_StillSomeChunkBits(dev, block)) {
3022 T(YAFFS_TRACE_TRACING,
3024 ("Collecting block %d that has no chunks in use" TENDSTR),
3026 yaffs_BlockBecameDirty(dev, block);
3029 __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__);
3031 yaffs_VerifyBlock(dev, bi, block);
3033 maxCopies = (wholeBlock) ? dev->nChunksPerBlock : 10;
3034 oldChunk = block * dev->nChunksPerBlock + dev->gcChunk;
3036 for (/* init already done */;
3037 retVal == YAFFS_OK &&
3038 dev->gcChunk < dev->nChunksPerBlock &&
3039 (bi->blockState == YAFFS_BLOCK_STATE_COLLECTING) &&
3041 dev->gcChunk++, oldChunk++) {
3042 if (yaffs_CheckChunkBit(dev, block, dev->gcChunk)) {
3044 /* This page is in use and might need to be copied off */
3050 yaffs_InitialiseTags(&tags);
3052 yaffs_ReadChunkWithTagsFromNAND(dev, oldChunk,
3056 yaffs_FindObjectByNumber(dev,
3059 T(YAFFS_TRACE_GC_DETAIL,
3061 ("Collecting chunk in block %d, %d %d %d " TENDSTR),
3062 dev->gcChunk, tags.objectId, tags.chunkId,
3065 if (object && !yaffs_SkipVerification(dev)) {
3066 if (tags.chunkId == 0)
3067 matchingChunk = object->hdrChunk;
3068 else if (object->softDeleted)
3069 matchingChunk = oldChunk; /* Defeat the test */
3071 matchingChunk = yaffs_FindChunkInFile(object, tags.chunkId, NULL);
3073 if (oldChunk != matchingChunk)
3074 T(YAFFS_TRACE_ERROR,
3075 (TSTR("gc: page in gc mismatch: %d %d %d %d"TENDSTR),
3076 oldChunk, matchingChunk, tags.objectId, tags.chunkId));
3081 T(YAFFS_TRACE_ERROR,
3083 ("page %d in gc has no object: %d %d %d "
3085 tags.objectId, tags.chunkId, tags.byteCount));
3090 object->softDeleted &&
3091 tags.chunkId != 0) {
3092 /* Data chunk in a soft deleted file, throw it away
3093 * It's a soft deleted data chunk,
3094 * No need to copy this, just forget about it and
3095 * fix up the object.
3098 object->nDataChunks--;
3100 if (object->nDataChunks <= 0) {
3101 /* remeber to clean up the object */
3102 dev->gcCleanupList[cleanups] =
3108 /* Todo object && object->deleted && object->nDataChunks == 0 */
3109 /* Deleted object header with no data chunks.
3110 * Can be discarded and the file deleted.
3112 object->hdrChunk = 0;
3113 yaffs_FreeTnode(object->myDev,
3116 object->variant.fileVariant.top = NULL;
3117 yaffs_DoGenericObjectDeletion(object);
3119 } else if (object) {
3120 /* It's either a data chunk in a live file or
3121 * an ObjectHeader, so we're interested in it.
3122 * NB Need to keep the ObjectHeaders of deleted files
3123 * until the whole file has been deleted off
3125 tags.serialNumber++;
3129 if (tags.chunkId == 0) {
3130 /* It is an object Id,
3131 * We need to nuke the shrinkheader flags first
3132 * We no longer want the shrinkHeader flag since its work is done
3133 * and if it is left in place it will mess up scanning.
3136 yaffs_ObjectHeader *oh;
3137 oh = (yaffs_ObjectHeader *)buffer;
3139 tags.extraIsShrinkHeader = 0;
3141 yaffs_VerifyObjectHeader(object, oh, &tags, 1);
3145 yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &tags, 1);
3148 retVal = YAFFS_FAIL;
3151 /* Ok, now fix up the Tnodes etc. */
3153 if (tags.chunkId == 0) {
3155 object->hdrChunk = newChunk;
3156 object->serial = tags.serialNumber;
3158 /* It's a data chunk */
3159 yaffs_PutChunkIntoFile
3167 if (retVal == YAFFS_OK)
3168 yaffs_DeleteChunk(dev, oldChunk, markNAND, __LINE__);
3173 yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
3176 /* Do any required cleanups */
3177 for (i = 0; i < cleanups; i++) {
3178 /* Time to delete the file too */
3180 yaffs_FindObjectByNumber(dev,
3181 dev->gcCleanupList[i]);
3183 yaffs_FreeTnode(dev,
3184 object->variant.fileVariant.
3186 object->variant.fileVariant.top = NULL;
3189 ("yaffs: About to finally delete object %d"
3190 TENDSTR), object->objectId));
3191 yaffs_DoGenericObjectDeletion(object);
3192 object->myDev->nDeletedFiles--;
3199 yaffs_VerifyCollectedBlock(dev, bi, block);
3201 chunksAfter = yaffs_GetErasedChunks(dev);
3202 if (chunksBefore >= chunksAfter) {
3205 ("gc did not increase free chunks before %d after %d"
3206 TENDSTR), chunksBefore, chunksAfter));
3209 /* If the gc completed then clear the current gcBlock so that we find another. */
3210 if (bi->blockState != YAFFS_BLOCK_STATE_COLLECTING) {
3220 /* New garbage collector
3221 * If we're very low on erased blocks then we do aggressive garbage collection
3222 * otherwise we do "leasurely" garbage collection.
3223 * Aggressive gc looks further (whole array) and will accept less dirty blocks.
3224 * Passive gc only inspects smaller areas and will only accept more dirty blocks.
3226 * The idea is to help clear out space in a more spread-out manner.
3227 * Dunno if it really does anything useful.
3229 static int yaffs_CheckGarbageCollection(yaffs_Device *dev)
3233 int gcOk = YAFFS_OK;
3236 int checkpointBlockAdjust;
3238 if (dev->isDoingGC) {
3239 /* Bail out so we don't get recursive gc */
3243 /* This loop should pass the first time.
3244 * We'll only see looping here if the erase of the collected block fails.
3250 checkpointBlockAdjust = yaffs_CalcCheckpointBlocksRequired(dev) - dev->blocksInCheckpoint;
3251 if (checkpointBlockAdjust < 0)
3252 checkpointBlockAdjust = 0;
3254 if (dev->nErasedBlocks < (dev->nReservedBlocks + checkpointBlockAdjust + 2)) {
3255 /* We need a block soon...*/
3258 /* We're in no hurry */
3262 if (dev->gcBlock <= 0) {
3263 dev->gcBlock = yaffs_FindBlockForGarbageCollection(dev, aggressive);
3267 block = dev->gcBlock;
3270 dev->garbageCollections++;
3272 dev->passiveGarbageCollections++;
3276 ("yaffs: GC erasedBlocks %d aggressive %d" TENDSTR),
3277 dev->nErasedBlocks, aggressive));
3279 gcOk = yaffs_GarbageCollectBlock(dev, block, aggressive);
3282 if (dev->nErasedBlocks < (dev->nReservedBlocks) && block > 0) {
3285 ("yaffs: GC !!!no reclaim!!! erasedBlocks %d after try %d block %d"
3286 TENDSTR), dev->nErasedBlocks, maxTries, block));
3288 } while ((dev->nErasedBlocks < dev->nReservedBlocks) &&
3292 return aggressive ? gcOk : YAFFS_OK;
3295 /*------------------------- TAGS --------------------------------*/
3297 static int yaffs_TagsMatch(const yaffs_ExtendedTags *tags, int objectId,
3300 return (tags->chunkId == chunkInObject &&
3301 tags->objectId == objectId && !tags->chunkDeleted) ? 1 : 0;
3306 /*-------------------- Data file manipulation -----------------*/
3308 static int yaffs_FindChunkInFile(yaffs_Object *in, int chunkInInode,
3309 yaffs_ExtendedTags *tags)
3311 /*Get the Tnode, then get the level 0 offset chunk offset */
3314 yaffs_ExtendedTags localTags;
3317 yaffs_Device *dev = in->myDev;
3320 /* Passed a NULL, so use our own tags space */
3324 tn = yaffs_FindLevel0Tnode(dev, &in->variant.fileVariant, chunkInInode);
3327 theChunk = yaffs_GetChunkGroupBase(dev, tn, chunkInInode);
3330 yaffs_FindChunkInGroup(dev, theChunk, tags, in->objectId,
3336 static int yaffs_FindAndDeleteChunkInFile(yaffs_Object *in, int chunkInInode,
3337 yaffs_ExtendedTags *tags)
3339 /* Get the Tnode, then get the level 0 offset chunk offset */
3342 yaffs_ExtendedTags localTags;
3344 yaffs_Device *dev = in->myDev;
3348 /* Passed a NULL, so use our own tags space */
3352 tn = yaffs_FindLevel0Tnode(dev, &in->variant.fileVariant, chunkInInode);
3356 theChunk = yaffs_GetChunkGroupBase(dev, tn, chunkInInode);
3359 yaffs_FindChunkInGroup(dev, theChunk, tags, in->objectId,
3362 /* Delete the entry in the filestructure (if found) */
3364 yaffs_LoadLevel0Tnode(dev, tn, chunkInInode, 0);
3370 #ifdef YAFFS_PARANOID
3372 static int yaffs_CheckFileSanity(yaffs_Object *in)
3380 yaffs_Tags localTags;
3381 yaffs_Tags *tags = &localTags;
3385 if (in->variantType != YAFFS_OBJECT_TYPE_FILE)
3388 objId = in->objectId;
3389 fSize = in->variant.fileVariant.fileSize;
3391 (fSize + in->myDev->nDataBytesPerChunk - 1) / in->myDev->nDataBytesPerChunk;
3393 for (chunk = 1; chunk <= nChunks; chunk++) {
3394 tn = yaffs_FindLevel0Tnode(in->myDev, &in->variant.fileVariant,
3399 theChunk = yaffs_GetChunkGroupBase(dev, tn, chunk);
3401 if (yaffs_CheckChunkBits
3402 (dev, theChunk / dev->nChunksPerBlock,
3403 theChunk % dev->nChunksPerBlock)) {
3405 yaffs_ReadChunkTagsFromNAND(in->myDev, theChunk,
3409 (tags, in->objectId, chunk, chunkDeleted)) {
3419 /* T(("No level 0 found for %d\n", chunk)); */
3423 return failed ? YAFFS_FAIL : YAFFS_OK;
3428 static int yaffs_PutChunkIntoFile(yaffs_Object *in, int chunkInInode,
3429 int chunkInNAND, int inScan)
3431 /* NB inScan is zero unless scanning.
3432 * For forward scanning, inScan is > 0;
3433 * for backward scanning inScan is < 0
3435 * chunkInNAND = 0 is a dummy insert to make sure the tnodes are there.
3439 yaffs_Device *dev = in->myDev;
3441 yaffs_ExtendedTags existingTags;
3442 yaffs_ExtendedTags newTags;
3443 unsigned existingSerial, newSerial;
3445 if (in->variantType != YAFFS_OBJECT_TYPE_FILE) {
3446 /* Just ignore an attempt at putting a chunk into a non-file during scanning
3447 * If it is not during Scanning then something went wrong!
3450 T(YAFFS_TRACE_ERROR,
3452 ("yaffs tragedy:attempt to put data chunk into a non-file"
3457 yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__);
3461 tn = yaffs_AddOrFindLevel0Tnode(dev,
3462 &in->variant.fileVariant,
3469 /* Dummy insert, bail now */
3473 existingChunk = yaffs_GetChunkGroupBase(dev, tn, chunkInInode);
3476 /* If we're scanning then we need to test for duplicates
3477 * NB This does not need to be efficient since it should only ever
3478 * happen when the power fails during a write, then only one
3479 * chunk should ever be affected.
3481 * Correction for YAFFS2: This could happen quite a lot and we need to think about efficiency! TODO
3482 * Update: For backward scanning we don't need to re-read tags so this is quite cheap.
3485 if (existingChunk > 0) {
3486 /* NB Right now existing chunk will not be real chunkId if the device >= 32MB
3487 * thus we have to do a FindChunkInFile to get the real chunk id.
3489 * We have a duplicate now we need to decide which one to use:
3491 * Backwards scanning YAFFS2: The old one is what we use, dump the new one.
3492 * Forward scanning YAFFS2: The new one is what we use, dump the old one.
3493 * YAFFS1: Get both sets of tags and compare serial numbers.
3497 /* Only do this for forward scanning */
3498 yaffs_ReadChunkWithTagsFromNAND(dev,
3502 /* Do a proper find */
3504 yaffs_FindChunkInFile(in, chunkInInode,
3508 if (existingChunk <= 0) {
3509 /*Hoosterman - how did this happen? */
3511 T(YAFFS_TRACE_ERROR,
3513 ("yaffs tragedy: existing chunk < 0 in scan"
3518 /* NB The deleted flags should be false, otherwise the chunks will
3519 * not be loaded during a scan
3523 newSerial = newTags.serialNumber;
3524 existingSerial = existingTags.serialNumber;
3528 (in->myDev->isYaffs2 ||
3529 existingChunk <= 0 ||
3530 ((existingSerial + 1) & 3) == newSerial)) {
3531 /* Forward scanning.
3533 * Delete the old one and drop through to update the tnode
3535 yaffs_DeleteChunk(dev, existingChunk, 1,
3538 /* Backward scanning or we want to use the existing one
3540 * Delete the new one and return early so that the tnode isn't changed
3542 yaffs_DeleteChunk(dev, chunkInNAND, 1,
3550 if (existingChunk == 0)
3553 yaffs_LoadLevel0Tnode(dev, tn, chunkInInode, chunkInNAND);
3558 static int yaffs_ReadChunkDataFromObject(yaffs_Object *in, int chunkInInode,
3561 int chunkInNAND = yaffs_FindChunkInFile(in, chunkInInode, NULL);
3563 if (chunkInNAND >= 0)
3564 return yaffs_ReadChunkWithTagsFromNAND(in->myDev, chunkInNAND,
3567 T(YAFFS_TRACE_NANDACCESS,
3568 (TSTR("Chunk %d not found zero instead" TENDSTR),
3570 /* get sane (zero) data if you read a hole */
3571 memset(buffer, 0, in->myDev->nDataBytesPerChunk);
3577 void yaffs_DeleteChunk(yaffs_Device *dev, int chunkId, int markNAND, int lyn)
3581 yaffs_ExtendedTags tags;
3582 yaffs_BlockInfo *bi;
3588 block = chunkId / dev->nChunksPerBlock;
3589 page = chunkId % dev->nChunksPerBlock;
3592 if (!yaffs_CheckChunkBit(dev, block, page))
3593 T(YAFFS_TRACE_VERIFY,
3594 (TSTR("Deleting invalid chunk %d"TENDSTR),
3597 bi = yaffs_GetBlockInfo(dev, block);
3599 T(YAFFS_TRACE_DELETION,
3600 (TSTR("line %d delete of chunk %d" TENDSTR), lyn, chunkId));
3603 bi->blockState != YAFFS_BLOCK_STATE_COLLECTING && !dev->isYaffs2) {
3605 yaffs_InitialiseTags(&tags);
3607 tags.chunkDeleted = 1;
3609 yaffs_WriteChunkWithTagsToNAND(dev, chunkId, NULL, &tags);
3610 yaffs_HandleUpdateChunk(dev, chunkId, &tags);
3612 dev->nUnmarkedDeletions++;
3615 /* Pull out of the management area.
3616 * If the whole block became dirty, this will kick off an erasure.
3618 if (bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING ||
3619 bi->blockState == YAFFS_BLOCK_STATE_FULL ||
3620 bi->blockState == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
3621 bi->blockState == YAFFS_BLOCK_STATE_COLLECTING) {
3624 yaffs_ClearChunkBit(dev, block, page);
3628 if (bi->pagesInUse == 0 &&
3629 !bi->hasShrinkHeader &&
3630 bi->blockState != YAFFS_BLOCK_STATE_ALLOCATING &&
3631 bi->blockState != YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
3632 yaffs_BlockBecameDirty(dev, block);
3639 static int yaffs_WriteChunkDataToObject(yaffs_Object *in, int chunkInInode,
3640 const __u8 *buffer, int nBytes,
3643 /* Find old chunk Need to do this to get serial number
3644 * Write new one and patch into tree.
3645 * Invalidate old tags.
3649 yaffs_ExtendedTags prevTags;
3652 yaffs_ExtendedTags newTags;
3654 yaffs_Device *dev = in->myDev;
3656 yaffs_CheckGarbageCollection(dev);
3658 /* Get the previous chunk at this location in the file if it exists */
3659 prevChunkId = yaffs_FindChunkInFile(in, chunkInInode, &prevTags);
3661 /* Set up new tags */
3662 yaffs_InitialiseTags(&newTags);
3664 newTags.chunkId = chunkInInode;
3665 newTags.objectId = in->objectId;
3666 newTags.serialNumber =
3667 (prevChunkId > 0) ? prevTags.serialNumber + 1 : 1;
3668 newTags.byteCount = nBytes;
3670 if (nBytes < 1 || nBytes > dev->totalBytesPerChunk) {
3671 T(YAFFS_TRACE_ERROR,
3672 (TSTR("Writing %d bytes to chunk!!!!!!!!!" TENDSTR), nBytes));
3677 * If there isn't already a chunk there then do a dummy
3678 * insert to make sue we have the desired tnode structure.
3680 if(prevChunkId < 1 &&
3681 yaffs_PutChunkIntoFile(in, chunkInInode, 0, 0) != YAFFS_OK)
3685 yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &newTags,
3688 if (newChunkId > 0) {
3689 yaffs_PutChunkIntoFile(in, chunkInInode, newChunkId, 0);
3691 if (prevChunkId > 0)
3692 yaffs_DeleteChunk(dev, prevChunkId, 1, __LINE__);
3694 yaffs_CheckFileSanity(in);
3700 /* UpdateObjectHeader updates the header on NAND for an object.
3701 * If name is not NULL, then that new name is used.
3703 int yaffs_UpdateObjectHeader(yaffs_Object *in, const YCHAR *name, int force,
3704 int isShrink, int shadows)
3707 yaffs_BlockInfo *bi;
3709 yaffs_Device *dev = in->myDev;
3716 yaffs_ExtendedTags newTags;
3717 yaffs_ExtendedTags oldTags;
3719 __u8 *buffer = NULL;
3720 YCHAR oldName[YAFFS_MAX_NAME_LENGTH + 1];
3722 yaffs_ObjectHeader *oh = NULL;
3724 yaffs_strcpy(oldName, _Y("silly old name"));
3728 in == dev->rootDir || /* The rootDir should also be saved */
3731 yaffs_CheckGarbageCollection(dev);
3732 yaffs_CheckObjectDetailsLoaded(in);
3734 buffer = yaffs_GetTempBuffer(in->myDev, __LINE__);
3735 oh = (yaffs_ObjectHeader *) buffer;
3737 prevChunkId = in->hdrChunk;
3739 if (prevChunkId > 0) {
3740 result = yaffs_ReadChunkWithTagsFromNAND(dev, prevChunkId,
3743 yaffs_VerifyObjectHeader(in, oh, &oldTags, 0);
3745 memcpy(oldName, oh->name, sizeof(oh->name));
3748 memset(buffer, 0xFF, dev->nDataBytesPerChunk);
3750 oh->type = in->variantType;
3751 oh->yst_mode = in->yst_mode;
3752 oh->shadowsObject = oh->inbandShadowsObject = shadows;
3754 #ifdef CONFIG_YAFFS_WINCE
3755 oh->win_atime[0] = in->win_atime[0];
3756 oh->win_ctime[0] = in->win_ctime[0];
3757 oh->win_mtime[0] = in->win_mtime[0];
3758 oh->win_atime[1] = in->win_atime[1];
3759 oh->win_ctime[1] = in->win_ctime[1];
3760 oh->win_mtime[1] = in->win_mtime[1];
3762 oh->yst_uid = in->yst_uid;
3763 oh->yst_gid = in->yst_gid;
3764 oh->yst_atime = in->yst_atime;
3765 oh->yst_mtime = in->yst_mtime;
3766 oh->yst_ctime = in->yst_ctime;
3767 oh->yst_rdev = in->yst_rdev;
3770 oh->parentObjectId = in->parent->objectId;
3772 oh->parentObjectId = 0;
3774 if (name && *name) {
3775 memset(oh->name, 0, sizeof(oh->name));
3776 yaffs_strncpy(oh->name, name, YAFFS_MAX_NAME_LENGTH);
3777 } else if (prevChunkId > 0)
3778 memcpy(oh->name, oldName, sizeof(oh->name));
3780 memset(oh->name, 0, sizeof(oh->name));
3782 oh->isShrink = isShrink;
3784 switch (in->variantType) {
3785 case YAFFS_OBJECT_TYPE_UNKNOWN:
3786 /* Should not happen */
3788 case YAFFS_OBJECT_TYPE_FILE:
3790 (oh->parentObjectId == YAFFS_OBJECTID_DELETED
3791 || oh->parentObjectId ==
3792 YAFFS_OBJECTID_UNLINKED) ? 0 : in->variant.
3793 fileVariant.fileSize;
3795 case YAFFS_OBJECT_TYPE_HARDLINK:
3796 oh->equivalentObjectId =
3797 in->variant.hardLinkVariant.equivalentObjectId;
3799 case YAFFS_OBJECT_TYPE_SPECIAL:
3802 case YAFFS_OBJECT_TYPE_DIRECTORY:
3805 case YAFFS_OBJECT_TYPE_SYMLINK:
3806 yaffs_strncpy(oh->alias,
3807 in->variant.symLinkVariant.alias,
3808 YAFFS_MAX_ALIAS_LENGTH);
3809 oh->alias[YAFFS_MAX_ALIAS_LENGTH] = 0;
3814 yaffs_InitialiseTags(&newTags);
3816 newTags.chunkId = 0;
3817 newTags.objectId = in->objectId;
3818 newTags.serialNumber = in->serial;
3820 /* Add extra info for file header */
3822 newTags.extraHeaderInfoAvailable = 1;
3823 newTags.extraParentObjectId = oh->parentObjectId;
3824 newTags.extraFileLength = oh->fileSize;
3825 newTags.extraIsShrinkHeader = oh->isShrink;
3826 newTags.extraEquivalentObjectId = oh->equivalentObjectId;
3827 newTags.extraShadows = (oh->shadowsObject > 0) ? 1 : 0;
3828 newTags.extraObjectType = in->variantType;
3830 yaffs_VerifyObjectHeader(in, oh, &newTags, 1);
3832 /* Create new chunk in NAND */
3834 yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &newTags,
3835 (prevChunkId > 0) ? 1 : 0);
3837 if (newChunkId >= 0) {
3839 in->hdrChunk = newChunkId;
3841 if (prevChunkId > 0) {
3842 yaffs_DeleteChunk(dev, prevChunkId, 1,
3846 if (!yaffs_ObjectHasCachedWriteData(in))
3849 /* If this was a shrink, then mark the block that the chunk lives on */
3851 bi = yaffs_GetBlockInfo(in->myDev,
3852 newChunkId / in->myDev->nChunksPerBlock);
3853 bi->hasShrinkHeader = 1;
3858 retVal = newChunkId;
3863 yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
3868 /*------------------------ Short Operations Cache ----------------------------------------
3869 * In many situations where there is no high level buffering (eg WinCE) a lot of
3870 * reads might be short sequential reads, and a lot of writes may be short
3871 * sequential writes. eg. scanning/writing a jpeg file.
3872 * In these cases, a short read/write cache can provide a huge perfomance benefit
3873 * with dumb-as-a-rock code.
3874 * In Linux, the page cache provides read buffering aand the short op cache provides write
3877 * There are a limited number (~10) of cache chunks per device so that we don't
3878 * need a very intelligent search.
3881 static int yaffs_ObjectHasCachedWriteData(yaffs_Object *obj)
3883 yaffs_Device *dev = obj->myDev;
3885 yaffs_ChunkCache *cache;
3886 int nCaches = obj->myDev->nShortOpCaches;
3888 for (i = 0; i < nCaches; i++) {
3889 cache = &dev->srCache[i];
3890 if (cache->object == obj &&
3899 static void yaffs_FlushFilesChunkCache(yaffs_Object *obj)
3901 yaffs_Device *dev = obj->myDev;
3902 int lowest = -99; /* Stop compiler whining. */
3904 yaffs_ChunkCache *cache;
3905 int chunkWritten = 0;
3906 int nCaches = obj->myDev->nShortOpCaches;
3912 /* Find the dirty cache for this object with the lowest chunk id. */
3913 for (i = 0; i < nCaches; i++) {
3914 if (dev->srCache[i].object == obj &&
3915 dev->srCache[i].dirty) {
3917 || dev->srCache[i].chunkId <
3919 cache = &dev->srCache[i];
3920 lowest = cache->chunkId;
3925 if (cache && !cache->locked) {
3926 /* Write it out and free it up */
3929 yaffs_WriteChunkDataToObject(cache->object,
3935 cache->object = NULL;
3938 } while (cache && chunkWritten > 0);
3941 /* Hoosterman, disk full while writing cache out. */
3942 T(YAFFS_TRACE_ERROR,
3943 (TSTR("yaffs tragedy: no space during cache write" TENDSTR)));
3950 /*yaffs_FlushEntireDeviceCache(dev)
3955 void yaffs_FlushEntireDeviceCache(yaffs_Device *dev)
3958 int nCaches = dev->nShortOpCaches;
3961 /* Find a dirty object in the cache and flush it...
3962 * until there are no further dirty objects.
3966 for (i = 0; i < nCaches && !obj; i++) {
3967 if (dev->srCache[i].object &&
3968 dev->srCache[i].dirty)
3969 obj = dev->srCache[i].object;
3973 yaffs_FlushFilesChunkCache(obj);
3980 /* Grab us a cache chunk for use.
3981 * First look for an empty one.
3982 * Then look for the least recently used non-dirty one.
3983 * Then look for the least recently used dirty one...., flush and look again.
3985 static yaffs_ChunkCache *yaffs_GrabChunkCacheWorker(yaffs_Device *dev)
3989 if (dev->nShortOpCaches > 0) {
3990 for (i = 0; i < dev->nShortOpCaches; i++) {
3991 if (!dev->srCache[i].object)
3992 return &dev->srCache[i];
3999 static yaffs_ChunkCache *yaffs_GrabChunkCache(yaffs_Device *dev)
4001 yaffs_ChunkCache *cache;
4002 yaffs_Object *theObj;
4007 if (dev->nShortOpCaches > 0) {
4008 /* Try find a non-dirty one... */
4010 cache = yaffs_GrabChunkCacheWorker(dev);
4013 /* They were all dirty, find the last recently used object and flush
4014 * its cache, then find again.
4015 * NB what's here is not very accurate, we actually flush the object
4016 * the last recently used page.
4019 /* With locking we can't assume we can use entry zero */
4026 for (i = 0; i < dev->nShortOpCaches; i++) {
4027 if (dev->srCache[i].object &&
4028 !dev->srCache[i].locked &&
4029 (dev->srCache[i].lastUse < usage || !cache)) {
4030 usage = dev->srCache[i].lastUse;
4031 theObj = dev->srCache[i].object;
4032 cache = &dev->srCache[i];
4037 if (!cache || cache->dirty) {
4038 /* Flush and try again */
4039 yaffs_FlushFilesChunkCache(theObj);
4040 cache = yaffs_GrabChunkCacheWorker(dev);
4050 /* Find a cached chunk */
4051 static yaffs_ChunkCache *yaffs_FindChunkCache(const yaffs_Object *obj,
4054 yaffs_Device *dev = obj->myDev;
4056 if (dev->nShortOpCaches > 0) {
4057 for (i = 0; i < dev->nShortOpCaches; i++) {
4058 if (dev->srCache[i].object == obj &&
4059 dev->srCache[i].chunkId == chunkId) {
4062 return &dev->srCache[i];
4069 /* Mark the chunk for the least recently used algorithym */
4070 static void yaffs_UseChunkCache(yaffs_Device *dev, yaffs_ChunkCache *cache,
4074 if (dev->nShortOpCaches > 0) {
4075 if (dev->srLastUse < 0 || dev->srLastUse > 100000000) {
4076 /* Reset the cache usages */
4078 for (i = 1; i < dev->nShortOpCaches; i++)
4079 dev->srCache[i].lastUse = 0;
4086 cache->lastUse = dev->srLastUse;
4093 /* Invalidate a single cache page.
4094 * Do this when a whole page gets written,
4095 * ie the short cache for this page is no longer valid.
4097 static void yaffs_InvalidateChunkCache(yaffs_Object *object, int chunkId)
4099 if (object->myDev->nShortOpCaches > 0) {
4100 yaffs_ChunkCache *cache = yaffs_FindChunkCache(object, chunkId);
4103 cache->object = NULL;
4107 /* Invalidate all the cache pages associated with this object
4108 * Do this whenever ther file is deleted or resized.
4110 static void yaffs_InvalidateWholeChunkCache(yaffs_Object *in)
4113 yaffs_Device *dev = in->myDev;
4115 if (dev->nShortOpCaches > 0) {
4116 /* Invalidate it. */
4117 for (i = 0; i < dev->nShortOpCaches; i++) {
4118 if (dev->srCache[i].object == in)
4119 dev->srCache[i].object = NULL;
4124 /*--------------------- Checkpointing --------------------*/
4127 static int yaffs_WriteCheckpointValidityMarker(yaffs_Device *dev, int head)
4129 yaffs_CheckpointValidity cp;
4131 memset(&cp, 0, sizeof(cp));
4133 cp.structType = sizeof(cp);
4134 cp.magic = YAFFS_MAGIC;
4135 cp.version = YAFFS_CHECKPOINT_VERSION;
4136 cp.head = (head) ? 1 : 0;
4138 return (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp)) ?
4142 static int yaffs_ReadCheckpointValidityMarker(yaffs_Device *dev, int head)
4144 yaffs_CheckpointValidity cp;
4147 ok = (yaffs_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp));
4150 ok = (cp.structType == sizeof(cp)) &&
4151 (cp.magic == YAFFS_MAGIC) &&
4152 (cp.version == YAFFS_CHECKPOINT_VERSION) &&
4153 (cp.head == ((head) ? 1 : 0));
4157 static void yaffs_DeviceToCheckpointDevice(yaffs_CheckpointDevice *cp,
4160 cp->nErasedBlocks = dev->nErasedBlocks;
4161 cp->allocationBlock = dev->allocationBlock;
4162 cp->allocationPage = dev->allocationPage;
4163 cp->nFreeChunks = dev->nFreeChunks;
4165 cp->nDeletedFiles = dev->nDeletedFiles;
4166 cp->nUnlinkedFiles = dev->nUnlinkedFiles;
4167 cp->nBackgroundDeletions = dev->nBackgroundDeletions;
4168 cp->sequenceNumber = dev->sequenceNumber;
4169 cp->oldestDirtySequence = dev->oldestDirtySequence;
4173 static void yaffs_CheckpointDeviceToDevice(yaffs_Device *dev,
4174 yaffs_CheckpointDevice *cp)
4176 dev->nErasedBlocks = cp->nErasedBlocks;
4177 dev->allocationBlock = cp->allocationBlock;
4178 dev->allocationPage = cp->allocationPage;
4179 dev->nFreeChunks = cp->nFreeChunks;
4181 dev->nDeletedFiles = cp->nDeletedFiles;
4182 dev->nUnlinkedFiles = cp->nUnlinkedFiles;
4183 dev->nBackgroundDeletions = cp->nBackgroundDeletions;
4184 dev->sequenceNumber = cp->sequenceNumber;
4185 dev->oldestDirtySequence = cp->oldestDirtySequence;
4189 static int yaffs_WriteCheckpointDevice(yaffs_Device *dev)
4191 yaffs_CheckpointDevice cp;
4193 __u32 nBlocks = (dev->internalEndBlock - dev->internalStartBlock + 1);
4197 /* Write device runtime values*/
4198 yaffs_DeviceToCheckpointDevice(&cp, dev);
4199 cp.structType = sizeof(cp);
4201 ok = (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp));
4203 /* Write block info */
4205 nBytes = nBlocks * sizeof(yaffs_BlockInfo);
4206 ok = (yaffs_CheckpointWrite(dev, dev->blockInfo, nBytes) == nBytes);
4209 /* Write chunk bits */
4211 nBytes = nBlocks * dev->chunkBitmapStride;
4212 ok = (yaffs_CheckpointWrite(dev, dev->chunkBits, nBytes) == nBytes);
4218 static int yaffs_ReadCheckpointDevice(yaffs_Device *dev)
4220 yaffs_CheckpointDevice cp;
4222 __u32 nBlocks = (dev->internalEndBlock - dev->internalStartBlock + 1);
4226 ok = (yaffs_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp));
4230 if (cp.structType != sizeof(cp))
4234 yaffs_CheckpointDeviceToDevice(dev, &cp);
4236 nBytes = nBlocks * sizeof(yaffs_BlockInfo);
4238 ok = (yaffs_CheckpointRead(dev, dev->blockInfo, nBytes) == nBytes);
4242 nBytes = nBlocks * dev->chunkBitmapStride;
4244 ok = (yaffs_CheckpointRead(dev, dev->chunkBits, nBytes) == nBytes);
4249 static void yaffs_ObjectToCheckpointObject(yaffs_CheckpointObject *cp,
4253 cp->objectId = obj->objectId;
4254 cp->parentId = (obj->parent) ? obj->parent->objectId : 0;
4255 cp->hdrChunk = obj->hdrChunk;
4256 cp->variantType = obj->variantType;
4257 cp->deleted = obj->deleted;
4258 cp->softDeleted = obj->softDeleted;
4259 cp->unlinked = obj->unlinked;
4260 cp->fake = obj->fake;
4261 cp->renameAllowed = obj->renameAllowed;
4262 cp->unlinkAllowed = obj->unlinkAllowed;
4263 cp->serial = obj->serial;
4264 cp->nDataChunks = obj->nDataChunks;
4266 if (obj->variantType == YAFFS_OBJECT_TYPE_FILE)
4267 cp->fileSizeOrEquivalentObjectId = obj->variant.fileVariant.fileSize;
4268 else if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK)
4269 cp->fileSizeOrEquivalentObjectId = obj->variant.hardLinkVariant.equivalentObjectId;
4272 static int yaffs_CheckpointObjectToObject(yaffs_Object *obj, yaffs_CheckpointObject *cp)
4275 yaffs_Object *parent;
4277 if (obj->variantType != cp->variantType) {
4278 T(YAFFS_TRACE_ERROR, (TSTR("Checkpoint read object %d type %d "
4279 TCONT("chunk %d does not match existing object type %d")
4280 TENDSTR), cp->objectId, cp->variantType, cp->hdrChunk,
4285 obj->objectId = cp->objectId;
4288 parent = yaffs_FindOrCreateObjectByNumber(
4291 YAFFS_OBJECT_TYPE_DIRECTORY);
4296 if (parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
4297 T(YAFFS_TRACE_ALWAYS, (TSTR("Checkpoint read object %d parent %d type %d"
4298 TCONT(" chunk %d Parent type, %d, not directory")
4300 cp->objectId, cp->parentId, cp->variantType,
4301 cp->hdrChunk, parent->variantType));
4304 yaffs_AddObjectToDirectory(parent, obj);
4307 obj->hdrChunk = cp->hdrChunk;
4308 obj->variantType = cp->variantType;
4309 obj->deleted = cp->deleted;
4310 obj->softDeleted = cp->softDeleted;
4311 obj->unlinked = cp->unlinked;
4312 obj->fake = cp->fake;
4313 obj->renameAllowed = cp->renameAllowed;
4314 obj->unlinkAllowed = cp->unlinkAllowed;
4315 obj->serial = cp->serial;
4316 obj->nDataChunks = cp->nDataChunks;
4318 if (obj->variantType == YAFFS_OBJECT_TYPE_FILE)
4319 obj->variant.fileVariant.fileSize = cp->fileSizeOrEquivalentObjectId;
4320 else if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK)
4321 obj->variant.hardLinkVariant.equivalentObjectId = cp->fileSizeOrEquivalentObjectId;
4323 if (obj->hdrChunk > 0)
4324 obj->lazyLoaded = 1;
4330 static int yaffs_CheckpointTnodeWorker(yaffs_Object *in, yaffs_Tnode *tn,
4331 __u32 level, int chunkOffset)
4334 yaffs_Device *dev = in->myDev;
4336 int tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
4338 if (tnodeSize < sizeof(yaffs_Tnode))
4339 tnodeSize = sizeof(yaffs_Tnode);
4345 for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++) {
4346 if (tn->internal[i]) {
4347 ok = yaffs_CheckpointTnodeWorker(in,
4350 (chunkOffset<<YAFFS_TNODES_INTERNAL_BITS) + i);
4353 } else if (level == 0) {
4354 __u32 baseOffset = chunkOffset << YAFFS_TNODES_LEVEL0_BITS;
4355 ok = (yaffs_CheckpointWrite(dev, &baseOffset, sizeof(baseOffset)) == sizeof(baseOffset));
4357 ok = (yaffs_CheckpointWrite(dev, tn, tnodeSize) == tnodeSize);
4365 static int yaffs_WriteCheckpointTnodes(yaffs_Object *obj)
4367 __u32 endMarker = ~0;
4370 if (obj->variantType == YAFFS_OBJECT_TYPE_FILE) {
4371 ok = yaffs_CheckpointTnodeWorker(obj,
4372 obj->variant.fileVariant.top,
4373 obj->variant.fileVariant.topLevel,
4376 ok = (yaffs_CheckpointWrite(obj->myDev, &endMarker, sizeof(endMarker)) ==
4383 static int yaffs_ReadCheckpointTnodes(yaffs_Object *obj)
4387 yaffs_Device *dev = obj->myDev;
4388 yaffs_FileStructure *fileStructPtr = &obj->variant.fileVariant;
4391 int tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
4393 if (tnodeSize < sizeof(yaffs_Tnode))
4394 tnodeSize = sizeof(yaffs_Tnode);
4396 ok = (yaffs_CheckpointRead(dev, &baseChunk, sizeof(baseChunk)) == sizeof(baseChunk));
4398 while (ok && (~baseChunk)) {
4400 /* Read level 0 tnode */
4403 tn = yaffs_GetTnodeRaw(dev);
4405 ok = (yaffs_CheckpointRead(dev, tn, tnodeSize) == tnodeSize);
4410 ok = yaffs_AddOrFindLevel0Tnode(dev,
4416 ok = (yaffs_CheckpointRead(dev, &baseChunk, sizeof(baseChunk)) == sizeof(baseChunk));
4420 T(YAFFS_TRACE_CHECKPOINT, (
4421 TSTR("Checkpoint read tnodes %d records, last %d. ok %d" TENDSTR),
4422 nread, baseChunk, ok));
4428 static int yaffs_WriteCheckpointObjects(yaffs_Device *dev)
4431 yaffs_CheckpointObject cp;
4434 struct ylist_head *lh;
4437 /* Iterate through the objects in each hash entry,
4438 * dumping them to the checkpointing stream.
4441 for (i = 0; ok && i < YAFFS_NOBJECT_BUCKETS; i++) {
4442 ylist_for_each(lh, &dev->objectBucket[i].list) {
4444 obj = ylist_entry(lh, yaffs_Object, hashLink);
4445 if (!obj->deferedFree) {
4446 yaffs_ObjectToCheckpointObject(&cp, obj);
4447 cp.structType = sizeof(cp);
4449 T(YAFFS_TRACE_CHECKPOINT, (
4450 TSTR("Checkpoint write object %d parent %d type %d chunk %d obj addr %x" TENDSTR),
4451 cp.objectId, cp.parentId, cp.variantType, cp.hdrChunk, (unsigned) obj));
4453 ok = (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp));
4455 if (ok && obj->variantType == YAFFS_OBJECT_TYPE_FILE)
4456 ok = yaffs_WriteCheckpointTnodes(obj);
4462 /* Dump end of list */
4463 memset(&cp, 0xFF, sizeof(yaffs_CheckpointObject));
4464 cp.structType = sizeof(cp);
4467 ok = (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp));
4472 static int yaffs_ReadCheckpointObjects(yaffs_Device *dev)
4475 yaffs_CheckpointObject cp;
4478 yaffs_Object *hardList = NULL;
4480 while (ok && !done) {
4481 ok = (yaffs_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp));
4482 if (cp.structType != sizeof(cp)) {
4483 T(YAFFS_TRACE_CHECKPOINT, (TSTR("struct size %d instead of %d ok %d"TENDSTR),
4484 cp.structType, sizeof(cp), ok));
4488 T(YAFFS_TRACE_CHECKPOINT, (TSTR("Checkpoint read object %d parent %d type %d chunk %d " TENDSTR),
4489 cp.objectId, cp.parentId, cp.variantType, cp.hdrChunk));
4491 if (ok && cp.objectId == ~0)
4494 obj = yaffs_FindOrCreateObjectByNumber(dev, cp.objectId, cp.variantType);
4496 ok = yaffs_CheckpointObjectToObject(obj, &cp);
4499 if (obj->variantType == YAFFS_OBJECT_TYPE_FILE) {
4500 ok = yaffs_ReadCheckpointTnodes(obj);
4501 } else if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) {
4502 obj->hardLinks.next =
4503 (struct ylist_head *) hardList;
4512 yaffs_HardlinkFixup(dev, hardList);
4517 static int yaffs_WriteCheckpointSum(yaffs_Device *dev)
4519 __u32 checkpointSum;
4522 yaffs_GetCheckpointSum(dev, &checkpointSum);
4524 ok = (yaffs_CheckpointWrite(dev, &checkpointSum, sizeof(checkpointSum)) == sizeof(checkpointSum));
4532 static int yaffs_ReadCheckpointSum(yaffs_Device *dev)
4534 __u32 checkpointSum0;
4535 __u32 checkpointSum1;
4538 yaffs_GetCheckpointSum(dev, &checkpointSum0);
4540 ok = (yaffs_CheckpointRead(dev, &checkpointSum1, sizeof(checkpointSum1)) == sizeof(checkpointSum1));
4545 if (checkpointSum0 != checkpointSum1)
4552 static int yaffs_WriteCheckpointData(yaffs_Device *dev)
4556 if (dev->skipCheckpointWrite || !dev->isYaffs2) {
4557 T(YAFFS_TRACE_CHECKPOINT, (TSTR("skipping checkpoint write" TENDSTR)));
4562 ok = yaffs_CheckpointOpen(dev, 1);
4565 T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint validity" TENDSTR)));
4566 ok = yaffs_WriteCheckpointValidityMarker(dev, 1);
4569 T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint device" TENDSTR)));
4570 ok = yaffs_WriteCheckpointDevice(dev);
4573 T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint objects" TENDSTR)));
4574 ok = yaffs_WriteCheckpointObjects(dev);
4577 T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint validity" TENDSTR)));
4578 ok = yaffs_WriteCheckpointValidityMarker(dev, 0);
4582 ok = yaffs_WriteCheckpointSum(dev);
4584 if (!yaffs_CheckpointClose(dev))
4588 dev->isCheckpointed = 1;
4590 dev->isCheckpointed = 0;
4592 return dev->isCheckpointed;
4595 static int yaffs_ReadCheckpointData(yaffs_Device *dev)
4599 if (dev->skipCheckpointRead || !dev->isYaffs2) {
4600 T(YAFFS_TRACE_CHECKPOINT, (TSTR("skipping checkpoint read" TENDSTR)));
4605 ok = yaffs_CheckpointOpen(dev, 0); /* open for read */
4608 T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint validity" TENDSTR)));
4609 ok = yaffs_ReadCheckpointValidityMarker(dev, 1);
4612 T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint device" TENDSTR)));
4613 ok = yaffs_ReadCheckpointDevice(dev);
4616 T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint objects" TENDSTR)));
4617 ok = yaffs_ReadCheckpointObjects(dev);
4620 T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint validity" TENDSTR)));
4621 ok = yaffs_ReadCheckpointValidityMarker(dev, 0);
4625 ok = yaffs_ReadCheckpointSum(dev);
4626 T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint checksum %d" TENDSTR), ok));
4629 if (!yaffs_CheckpointClose(dev))
4633 dev->isCheckpointed = 1;
4635 dev->isCheckpointed = 0;
4641 static void yaffs_InvalidateCheckpoint(yaffs_Device *dev)
4643 if (dev->isCheckpointed ||
4644 dev->blocksInCheckpoint > 0) {
4645 dev->isCheckpointed = 0;
4646 yaffs_CheckpointInvalidateStream(dev);
4647 if (dev->superBlock && dev->markSuperBlockDirty)
4648 dev->markSuperBlockDirty(dev->superBlock);
4653 int yaffs_CheckpointSave(yaffs_Device *dev)
4656 T(YAFFS_TRACE_CHECKPOINT, (TSTR("save entry: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
4658 yaffs_VerifyObjects(dev);
4659 yaffs_VerifyBlocks(dev);
4660 yaffs_VerifyFreeChunks(dev);
4662 if (!dev->isCheckpointed) {
4663 yaffs_InvalidateCheckpoint(dev);
4664 yaffs_WriteCheckpointData(dev);
4667 T(YAFFS_TRACE_ALWAYS, (TSTR("save exit: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
4669 return dev->isCheckpointed;
4672 int yaffs_CheckpointRestore(yaffs_Device *dev)
4675 T(YAFFS_TRACE_CHECKPOINT, (TSTR("restore entry: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
4677 retval = yaffs_ReadCheckpointData(dev);
4679 if (dev->isCheckpointed) {
4680 yaffs_VerifyObjects(dev);
4681 yaffs_VerifyBlocks(dev);
4682 yaffs_VerifyFreeChunks(dev);
4685 T(YAFFS_TRACE_CHECKPOINT, (TSTR("restore exit: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
4690 /*--------------------- File read/write ------------------------
4691 * Read and write have very similar structures.
4692 * In general the read/write has three parts to it
4693 * An incomplete chunk to start with (if the read/write is not chunk-aligned)
4694 * Some complete chunks
4695 * An incomplete chunk to end off with
4697 * Curve-balls: the first chunk might also be the last chunk.
4700 int yaffs_ReadDataFromFile(yaffs_Object *in, __u8 *buffer, loff_t offset,
4709 yaffs_ChunkCache *cache;
4716 /* chunk = offset / dev->nDataBytesPerChunk + 1; */
4717 /* start = offset % dev->nDataBytesPerChunk; */
4718 yaffs_AddrToChunk(dev, offset, &chunk, &start);
4721 /* OK now check for the curveball where the start and end are in
4724 if ((start + n) < dev->nDataBytesPerChunk)
4727 nToCopy = dev->nDataBytesPerChunk - start;
4729 cache = yaffs_FindChunkCache(in, chunk);
4731 /* If the chunk is already in the cache or it is less than a whole chunk
4732 * or we're using inband tags then use the cache (if there is caching)
4733 * else bypass the cache.
4735 if (cache || nToCopy != dev->nDataBytesPerChunk || dev->inbandTags) {
4736 if (dev->nShortOpCaches > 0) {
4738 /* If we can't find the data in the cache, then load it up. */
4741 cache = yaffs_GrabChunkCache(in->myDev);
4743 cache->chunkId = chunk;
4746 yaffs_ReadChunkDataFromObject(in, chunk,
4752 yaffs_UseChunkCache(dev, cache, 0);
4757 memcpy(buffer, &cache->data[start], nToCopy);
4761 /* Read into the local buffer then copy..*/
4764 yaffs_GetTempBuffer(dev, __LINE__);
4765 yaffs_ReadChunkDataFromObject(in, chunk,
4768 memcpy(buffer, &localBuffer[start], nToCopy);
4771 yaffs_ReleaseTempBuffer(dev, localBuffer,
4777 /* A full chunk. Read directly into the supplied buffer. */
4778 yaffs_ReadChunkDataFromObject(in, chunk, buffer);
4792 int yaffs_WriteDataToFile(yaffs_Object *in, const __u8 *buffer, loff_t offset,
4793 int nBytes, int writeThrough)
4802 int startOfWrite = offset;
4803 int chunkWritten = 0;
4811 while (n > 0 && chunkWritten >= 0) {
4812 /* chunk = offset / dev->nDataBytesPerChunk + 1; */
4813 /* start = offset % dev->nDataBytesPerChunk; */
4814 yaffs_AddrToChunk(dev, offset, &chunk, &start);
4816 if (chunk * dev->nDataBytesPerChunk + start != offset ||
4817 start >= dev->nDataBytesPerChunk) {
4818 T(YAFFS_TRACE_ERROR, (
4819 TSTR("AddrToChunk of offset %d gives chunk %d start %d"
4821 (int)offset, chunk, start));
4825 /* OK now check for the curveball where the start and end are in
4829 if ((start + n) < dev->nDataBytesPerChunk) {
4832 /* Now folks, to calculate how many bytes to write back....
4833 * If we're overwriting and not writing to then end of file then
4834 * we need to write back as much as was there before.
4837 chunkStart = ((chunk - 1) * dev->nDataBytesPerChunk);
4839 if (chunkStart > in->variant.fileVariant.fileSize)
4840 nBytesRead = 0; /* Past end of file */
4842 nBytesRead = in->variant.fileVariant.fileSize - chunkStart;
4844 if (nBytesRead > dev->nDataBytesPerChunk)
4845 nBytesRead = dev->nDataBytesPerChunk;
4849 (start + n)) ? nBytesRead : (start + n);
4851 if (nToWriteBack < 0 || nToWriteBack > dev->nDataBytesPerChunk)
4855 nToCopy = dev->nDataBytesPerChunk - start;
4856 nToWriteBack = dev->nDataBytesPerChunk;
4859 if (nToCopy != dev->nDataBytesPerChunk || dev->inbandTags) {
4860 /* An incomplete start or end chunk (or maybe both start and end chunk),
4861 * or we're using inband tags, so we want to use the cache buffers.
4863 if (dev->nShortOpCaches > 0) {
4864 yaffs_ChunkCache *cache;
4865 /* If we can't find the data in the cache, then load the cache */
4866 cache = yaffs_FindChunkCache(in, chunk);
4869 && yaffs_CheckSpaceForAllocation(in->
4871 cache = yaffs_GrabChunkCache(in->myDev);
4873 cache->chunkId = chunk;
4876 yaffs_ReadChunkDataFromObject(in, chunk,
4881 !yaffs_CheckSpaceForAllocation(in->myDev)) {
4882 /* Drop the cache if it was a read cache item and
4883 * no space check has been made for it.
4889 yaffs_UseChunkCache(dev, cache, 1);
4893 memcpy(&cache->data[start], buffer,
4898 cache->nBytes = nToWriteBack;
4902 yaffs_WriteChunkDataToObject
4905 cache->data, cache->nBytes,
4911 chunkWritten = -1; /* fail the write */
4914 /* An incomplete start or end chunk (or maybe both start and end chunk)
4915 * Read into the local buffer then copy, then copy over and write back.
4919 yaffs_GetTempBuffer(dev, __LINE__);
4921 yaffs_ReadChunkDataFromObject(in, chunk,
4926 memcpy(&localBuffer[start], buffer, nToCopy);
4929 yaffs_WriteChunkDataToObject(in, chunk,
4934 yaffs_ReleaseTempBuffer(dev, localBuffer,
4940 /* A full chunk. Write directly from the supplied buffer. */
4945 yaffs_WriteChunkDataToObject(in, chunk, buffer,
4946 dev->nDataBytesPerChunk,
4949 /* Since we've overwritten the cached data, we better invalidate it. */
4950 yaffs_InvalidateChunkCache(in, chunk);
4953 if (chunkWritten >= 0) {
4962 /* Update file object */
4964 if ((startOfWrite + nDone) > in->variant.fileVariant.fileSize)
4965 in->variant.fileVariant.fileSize = (startOfWrite + nDone);
4973 /* ---------------------- File resizing stuff ------------------ */
4975 static void yaffs_PruneResizedChunks(yaffs_Object *in, int newSize)
4978 yaffs_Device *dev = in->myDev;
4979 int oldFileSize = in->variant.fileVariant.fileSize;
4981 int lastDel = 1 + (oldFileSize - 1) / dev->nDataBytesPerChunk;
4983 int startDel = 1 + (newSize + dev->nDataBytesPerChunk - 1) /
4984 dev->nDataBytesPerChunk;
4988 /* Delete backwards so that we don't end up with holes if
4989 * power is lost part-way through the operation.
4991 for (i = lastDel; i >= startDel; i--) {
4992 /* NB this could be optimised somewhat,
4993 * eg. could retrieve the tags and write them without
4994 * using yaffs_DeleteChunk
4997 chunkId = yaffs_FindAndDeleteChunkInFile(in, i, NULL);
5000 (dev->internalStartBlock * dev->nChunksPerBlock)
5002 ((dev->internalEndBlock +
5003 1) * dev->nChunksPerBlock)) {
5004 T(YAFFS_TRACE_ALWAYS,
5005 (TSTR("Found daft chunkId %d for %d" TENDSTR),
5009 yaffs_DeleteChunk(dev, chunkId, 1, __LINE__);
5016 int yaffs_ResizeFile(yaffs_Object *in, loff_t newSize)
5019 int oldFileSize = in->variant.fileVariant.fileSize;
5020 __u32 newSizeOfPartialChunk;
5023 yaffs_Device *dev = in->myDev;
5025 yaffs_AddrToChunk(dev, newSize, &newFullChunks, &newSizeOfPartialChunk);
5027 yaffs_FlushFilesChunkCache(in);
5028 yaffs_InvalidateWholeChunkCache(in);
5030 yaffs_CheckGarbageCollection(dev);
5032 if (in->variantType != YAFFS_OBJECT_TYPE_FILE)
5035 if (newSize == oldFileSize)
5038 if (newSize < oldFileSize) {
5040 yaffs_PruneResizedChunks(in, newSize);
5042 if (newSizeOfPartialChunk != 0) {
5043 int lastChunk = 1 + newFullChunks;
5045 __u8 *localBuffer = yaffs_GetTempBuffer(dev, __LINE__);
5047 /* Got to read and rewrite the last chunk with its new size and zero pad */
5048 yaffs_ReadChunkDataFromObject(in, lastChunk,
5051 memset(localBuffer + newSizeOfPartialChunk, 0,
5052 dev->nDataBytesPerChunk - newSizeOfPartialChunk);
5054 yaffs_WriteChunkDataToObject(in, lastChunk, localBuffer,
5055 newSizeOfPartialChunk, 1);
5057 yaffs_ReleaseTempBuffer(dev, localBuffer, __LINE__);
5060 in->variant.fileVariant.fileSize = newSize;
5062 yaffs_PruneFileStructure(dev, &in->variant.fileVariant);
5064 /* newsSize > oldFileSize */
5065 in->variant.fileVariant.fileSize = newSize;
5069 /* Write a new object header to reflect the resize.
5070 * show we've shrunk the file, if need be
5071 * Do this only if the file is not in the deleted directories
5072 * and is not shadowed.
5076 in->parent->objectId != YAFFS_OBJECTID_UNLINKED &&
5077 in->parent->objectId != YAFFS_OBJECTID_DELETED)
5078 yaffs_UpdateObjectHeader(in, NULL, 0,
5079 (newSize < oldFileSize) ? 1 : 0, 0);
5084 loff_t yaffs_GetFileSize(yaffs_Object *obj)
5086 obj = yaffs_GetEquivalentObject(obj);
5088 switch (obj->variantType) {
5089 case YAFFS_OBJECT_TYPE_FILE:
5090 return obj->variant.fileVariant.fileSize;
5091 case YAFFS_OBJECT_TYPE_SYMLINK:
5092 return yaffs_strlen(obj->variant.symLinkVariant.alias);
5100 int yaffs_FlushFile(yaffs_Object *in, int updateTime, int dataSync)
5104 yaffs_FlushFilesChunkCache(in);
5105 if(dataSync) /* Only sync data */
5109 #ifdef CONFIG_YAFFS_WINCE
5110 yfsd_WinFileTimeNow(in->win_mtime);
5113 in->yst_mtime = Y_CURRENT_TIME;
5118 retVal = (yaffs_UpdateObjectHeader(in, NULL, 0, 0, 0) >=
5119 0) ? YAFFS_OK : YAFFS_FAIL;
5129 static int yaffs_DoGenericObjectDeletion(yaffs_Object *in)
5132 /* First off, invalidate the file's data in the cache, without flushing. */
5133 yaffs_InvalidateWholeChunkCache(in);
5135 if (in->myDev->isYaffs2 && (in->parent != in->myDev->deletedDir)) {
5136 /* Move to the unlinked directory so we have a record that it was deleted. */
5137 yaffs_ChangeObjectName(in, in->myDev->deletedDir, _Y("deleted"), 0, 0);
5141 yaffs_RemoveObjectFromDirectory(in);
5142 yaffs_DeleteChunk(in->myDev, in->hdrChunk, 1, __LINE__);
5145 yaffs_FreeObject(in);
5150 /* yaffs_DeleteFile deletes the whole file data
5151 * and the inode associated with the file.
5152 * It does not delete the links associated with the file.
5154 static int yaffs_UnlinkFileIfNeeded(yaffs_Object *in)
5158 int immediateDeletion = 0;
5162 immediateDeletion = 1;
5165 immediateDeletion = 1;
5168 if (immediateDeletion) {
5170 yaffs_ChangeObjectName(in, in->myDev->deletedDir,
5171 _Y("deleted"), 0, 0);
5172 T(YAFFS_TRACE_TRACING,
5173 (TSTR("yaffs: immediate deletion of file %d" TENDSTR),
5176 in->myDev->nDeletedFiles++;
5177 if (1 || in->myDev->isYaffs2)
5178 yaffs_ResizeFile(in, 0);
5179 yaffs_SoftDeleteFile(in);
5182 yaffs_ChangeObjectName(in, in->myDev->unlinkedDir,
5183 _Y("unlinked"), 0, 0);
5190 int yaffs_DeleteFile(yaffs_Object *in)
5192 int retVal = YAFFS_OK;
5193 int deleted = in->deleted;
5195 yaffs_ResizeFile(in, 0);
5197 if (in->nDataChunks > 0) {
5198 /* Use soft deletion if there is data in the file.
5199 * That won't be the case if it has been resized to zero.
5202 retVal = yaffs_UnlinkFileIfNeeded(in);
5204 if (retVal == YAFFS_OK && in->unlinked && !in->deleted) {
5207 in->myDev->nDeletedFiles++;
5208 yaffs_SoftDeleteFile(in);
5210 return deleted ? YAFFS_OK : YAFFS_FAIL;
5212 /* The file has no data chunks so we toss it immediately */
5213 yaffs_FreeTnode(in->myDev, in->variant.fileVariant.top);
5214 in->variant.fileVariant.top = NULL;
5215 yaffs_DoGenericObjectDeletion(in);
5221 static int yaffs_IsNonEmptyDirectory(yaffs_Object *obj)
5223 return (obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) &&
5224 !(ylist_empty(&obj->variant.directoryVariant.children));
5227 static int yaffs_DeleteDirectory(yaffs_Object *obj)
5229 /* First check that the directory is empty. */
5230 if (yaffs_IsNonEmptyDirectory(obj))
5233 return yaffs_DoGenericObjectDeletion(obj);
5236 static int yaffs_DeleteSymLink(yaffs_Object *in)
5238 YFREE(in->variant.symLinkVariant.alias);
5240 return yaffs_DoGenericObjectDeletion(in);
5243 static int yaffs_DeleteHardLink(yaffs_Object *in)
5245 /* remove this hardlink from the list assocaited with the equivalent
5248 ylist_del_init(&in->hardLinks);
5249 return yaffs_DoGenericObjectDeletion(in);
5252 int yaffs_DeleteObject(yaffs_Object *obj)
5255 switch (obj->variantType) {
5256 case YAFFS_OBJECT_TYPE_FILE:
5257 retVal = yaffs_DeleteFile(obj);
5259 case YAFFS_OBJECT_TYPE_DIRECTORY:
5260 return yaffs_DeleteDirectory(obj);
5262 case YAFFS_OBJECT_TYPE_SYMLINK:
5263 retVal = yaffs_DeleteSymLink(obj);
5265 case YAFFS_OBJECT_TYPE_HARDLINK:
5266 retVal = yaffs_DeleteHardLink(obj);
5268 case YAFFS_OBJECT_TYPE_SPECIAL:
5269 retVal = yaffs_DoGenericObjectDeletion(obj);
5271 case YAFFS_OBJECT_TYPE_UNKNOWN:
5273 break; /* should not happen. */
5279 static int yaffs_UnlinkWorker(yaffs_Object *obj)
5282 int immediateDeletion = 0;
5286 immediateDeletion = 1;
5288 if (obj->inUse <= 0)
5289 immediateDeletion = 1;
5293 yaffs_UpdateParent(obj->parent);
5295 if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) {
5296 return yaffs_DeleteHardLink(obj);
5297 } else if (!ylist_empty(&obj->hardLinks)) {
5298 /* Curve ball: We're unlinking an object that has a hardlink.
5300 * This problem arises because we are not strictly following
5301 * The Linux link/inode model.
5303 * We can't really delete the object.
5304 * Instead, we do the following:
5305 * - Select a hardlink.
5306 * - Unhook it from the hard links
5307 * - Unhook it from its parent directory (so that the rename can work)
5308 * - Rename the object to the hardlink's name.
5309 * - Delete the hardlink
5314 YCHAR name[YAFFS_MAX_NAME_LENGTH + 1];
5316 hl = ylist_entry(obj->hardLinks.next, yaffs_Object, hardLinks);
5318 ylist_del_init(&hl->hardLinks);
5319 ylist_del_init(&hl->siblings);
5321 yaffs_GetObjectName(hl, name, YAFFS_MAX_NAME_LENGTH + 1);
5323 retVal = yaffs_ChangeObjectName(obj, hl->parent, name, 0, 0);
5325 if (retVal == YAFFS_OK)
5326 retVal = yaffs_DoGenericObjectDeletion(hl);
5330 } else if (immediateDeletion) {
5331 switch (obj->variantType) {
5332 case YAFFS_OBJECT_TYPE_FILE:
5333 return yaffs_DeleteFile(obj);
5335 case YAFFS_OBJECT_TYPE_DIRECTORY:
5336 return yaffs_DeleteDirectory(obj);
5338 case YAFFS_OBJECT_TYPE_SYMLINK:
5339 return yaffs_DeleteSymLink(obj);
5341 case YAFFS_OBJECT_TYPE_SPECIAL:
5342 return yaffs_DoGenericObjectDeletion(obj);
5344 case YAFFS_OBJECT_TYPE_HARDLINK:
5345 case YAFFS_OBJECT_TYPE_UNKNOWN:
5349 } else if(yaffs_IsNonEmptyDirectory(obj))
5352 return yaffs_ChangeObjectName(obj, obj->myDev->unlinkedDir,
5353 _Y("unlinked"), 0, 0);
5357 static int yaffs_UnlinkObject(yaffs_Object *obj)
5360 if (obj && obj->unlinkAllowed)
5361 return yaffs_UnlinkWorker(obj);
5366 int yaffs_Unlink(yaffs_Object *dir, const YCHAR *name)
5370 obj = yaffs_FindObjectByName(dir, name);
5371 return yaffs_UnlinkObject(obj);
5374 /*----------------------- Initialisation Scanning ---------------------- */
5376 static void yaffs_HandleShadowedObject(yaffs_Device *dev, int objId,
5377 int backwardScanning)
5381 if (!backwardScanning) {
5382 /* Handle YAFFS1 forward scanning case
5383 * For YAFFS1 we always do the deletion
5387 /* Handle YAFFS2 case (backward scanning)
5388 * If the shadowed object exists then ignore.
5390 obj = yaffs_FindObjectByNumber(dev, objId);
5395 /* Let's create it (if it does not exist) assuming it is a file so that it can do shrinking etc.
5396 * We put it in unlinked dir to be cleaned up after the scanning
5399 yaffs_FindOrCreateObjectByNumber(dev, objId,
5400 YAFFS_OBJECT_TYPE_FILE);
5403 obj->isShadowed = 1;
5404 yaffs_AddObjectToDirectory(dev->unlinkedDir, obj);
5405 obj->variant.fileVariant.shrinkSize = 0;
5406 obj->valid = 1; /* So that we don't read any other info for this file */
5416 static void yaffs_HardlinkFixup(yaffs_Device *dev, yaffs_Object *hardList)
5423 hardList = (yaffs_Object *) (hardList->hardLinks.next);
5425 in = yaffs_FindObjectByNumber(dev,
5426 hl->variant.hardLinkVariant.
5427 equivalentObjectId);
5430 /* Add the hardlink pointers */
5431 hl->variant.hardLinkVariant.equivalentObject = in;
5432 ylist_add(&hl->hardLinks, &in->hardLinks);
5434 /* Todo Need to report/handle this better.
5435 * Got a problem... hardlink to a non-existant object
5437 hl->variant.hardLinkVariant.equivalentObject = NULL;
5438 YINIT_LIST_HEAD(&hl->hardLinks);
5448 static int ybicmp(const void *a, const void *b)
5450 register int aseq = ((yaffs_BlockIndex *)a)->seq;
5451 register int bseq = ((yaffs_BlockIndex *)b)->seq;
5452 register int ablock = ((yaffs_BlockIndex *)a)->block;
5453 register int bblock = ((yaffs_BlockIndex *)b)->block;
5455 return ablock - bblock;
5461 struct yaffs_ShadowFixerStruct {
5464 struct yaffs_ShadowFixerStruct *next;
5468 static void yaffs_StripDeletedObjects(yaffs_Device *dev)
5471 * Sort out state of unlinked and deleted objects after scanning.
5473 struct ylist_head *i;
5474 struct ylist_head *n;
5477 /* Soft delete all the unlinked files */
5478 ylist_for_each_safe(i, n,
5479 &dev->unlinkedDir->variant.directoryVariant.children) {
5481 l = ylist_entry(i, yaffs_Object, siblings);
5482 yaffs_DeleteObject(l);
5486 ylist_for_each_safe(i, n,
5487 &dev->deletedDir->variant.directoryVariant.children) {
5489 l = ylist_entry(i, yaffs_Object, siblings);
5490 yaffs_DeleteObject(l);
5497 * This code iterates through all the objects making sure that they are rooted.
5498 * Any unrooted objects are re-rooted in lost+found.
5499 * An object needs to be in one of:
5500 * - Directly under deleted, unlinked
5501 * - Directly or indirectly under root.
5504 * This code assumes that we don't ever change the current relationships between
5506 * rootDir->parent == unlinkedDir->parent == deletedDir->parent == NULL
5507 * lostNfound->parent == rootDir
5509 * This fixes the problem where directories might have inadvertently been deleted
5510 * leaving the object "hanging" without being rooted in the directory tree.
5513 static int yaffs_HasNULLParent(yaffs_Device *dev, yaffs_Object *obj)
5515 return (obj == dev->deletedDir ||
5516 obj == dev->unlinkedDir||
5517 obj == dev->rootDir);
5520 static void yaffs_FixHangingObjects(yaffs_Device *dev)
5523 yaffs_Object *parent;
5525 struct ylist_head *lh;
5526 struct ylist_head *n;
5531 /* Iterate through the objects in each hash entry,
5532 * looking at each object.
5533 * Make sure it is rooted.
5536 for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
5537 ylist_for_each_safe(lh, n, &dev->objectBucket[i].list) {
5539 obj = ylist_entry(lh, yaffs_Object, hashLink);
5540 parent= obj->parent;
5542 if(yaffs_HasNULLParent(dev,obj)){
5543 /* These directories are not hanging */
5546 else if(!parent || parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
5548 else if(yaffs_HasNULLParent(dev,parent))
5552 * Need to follow the parent chain to see if it is hanging.
5557 while(parent != dev->rootDir &&
5559 parent->parent->variantType == YAFFS_OBJECT_TYPE_DIRECTORY &&
5561 parent = parent->parent;
5564 if(parent != dev->rootDir)
5569 (TSTR("Hanging object %d moved to lost and found" TENDSTR),
5571 yaffs_AddObjectToDirectory(dev->lostNFoundDir,obj);
5580 * Delete directory contents for cleaning up lost and found.
5582 static void yaffs_DeleteDirectoryContents(yaffs_Object *dir)
5585 struct ylist_head *lh;
5586 struct ylist_head *n;
5588 if(dir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
5591 ylist_for_each_safe(lh, n, &dir->variant.directoryVariant.children) {
5593 obj = ylist_entry(lh, yaffs_Object, siblings);
5594 if(obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY)
5595 yaffs_DeleteDirectoryContents(obj);
5598 (TSTR("Deleting lost_found object %d" TENDSTR),
5601 /* Need to use UnlinkObject since Delete would not handle
5602 * hardlinked objects correctly.
5604 yaffs_UnlinkObject(obj);
5610 static void yaffs_EmptyLostAndFound(yaffs_Device *dev)
5612 yaffs_DeleteDirectoryContents(dev->lostNFoundDir);
5615 static int yaffs_Scan(yaffs_Device *dev)
5617 yaffs_ExtendedTags tags;
5627 yaffs_BlockState state;
5628 yaffs_Object *hardList = NULL;
5629 yaffs_BlockInfo *bi;
5630 __u32 sequenceNumber;
5631 yaffs_ObjectHeader *oh;
5633 yaffs_Object *parent;
5635 int alloc_failed = 0;
5637 struct yaffs_ShadowFixerStruct *shadowFixerList = NULL;
5645 (TSTR("yaffs_Scan starts intstartblk %d intendblk %d..." TENDSTR),
5646 dev->internalStartBlock, dev->internalEndBlock));
5648 chunkData = yaffs_GetTempBuffer(dev, __LINE__);
5650 dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER;
5652 /* Scan all the blocks to determine their state */
5653 for (blk = dev->internalStartBlock; blk <= dev->internalEndBlock; blk++) {
5654 bi = yaffs_GetBlockInfo(dev, blk);
5655 yaffs_ClearChunkBits(dev, blk);
5657 bi->softDeletions = 0;
5659 yaffs_QueryInitialBlockState(dev, blk, &state, &sequenceNumber);
5661 bi->blockState = state;
5662 bi->sequenceNumber = sequenceNumber;
5664 if (bi->sequenceNumber == YAFFS_SEQUENCE_BAD_BLOCK)
5665 bi->blockState = state = YAFFS_BLOCK_STATE_DEAD;
5667 T(YAFFS_TRACE_SCAN_DEBUG,
5668 (TSTR("Block scanning block %d state %d seq %d" TENDSTR), blk,
5669 state, sequenceNumber));
5671 if (state == YAFFS_BLOCK_STATE_DEAD) {
5672 T(YAFFS_TRACE_BAD_BLOCKS,
5673 (TSTR("block %d is bad" TENDSTR), blk));
5674 } else if (state == YAFFS_BLOCK_STATE_EMPTY) {
5675 T(YAFFS_TRACE_SCAN_DEBUG,
5676 (TSTR("Block empty " TENDSTR)));
5677 dev->nErasedBlocks++;
5678 dev->nFreeChunks += dev->nChunksPerBlock;
5682 startIterator = dev->internalStartBlock;
5683 endIterator = dev->internalEndBlock;
5685 /* For each block.... */
5686 for (blockIterator = startIterator; !alloc_failed && blockIterator <= endIterator;
5693 blk = blockIterator;
5695 bi = yaffs_GetBlockInfo(dev, blk);
5696 state = bi->blockState;
5700 /* For each chunk in each block that needs scanning....*/
5701 for (c = 0; !alloc_failed && c < dev->nChunksPerBlock &&
5702 state == YAFFS_BLOCK_STATE_NEEDS_SCANNING; c++) {
5703 /* Read the tags and decide what to do */
5704 chunk = blk * dev->nChunksPerBlock + c;
5706 result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk, NULL,
5709 /* Let's have a good look at this chunk... */
5711 if (tags.eccResult == YAFFS_ECC_RESULT_UNFIXED || tags.chunkDeleted) {
5717 /*T((" %d %d deleted\n",blk,c)); */
5718 } else if (!tags.chunkUsed) {
5719 /* An unassigned chunk in the block
5720 * This means that either the block is empty or
5721 * this is the one being allocated from
5725 /* We're looking at the first chunk in the block so the block is unused */
5726 state = YAFFS_BLOCK_STATE_EMPTY;
5727 dev->nErasedBlocks++;
5729 /* this is the block being allocated from */
5732 (" Allocating from %d %d" TENDSTR),
5734 state = YAFFS_BLOCK_STATE_ALLOCATING;
5735 dev->allocationBlock = blk;
5736 dev->allocationPage = c;
5737 dev->allocationBlockFinder = blk;
5738 /* Set it to here to encourage the allocator to go forth from here. */
5742 dev->nFreeChunks += (dev->nChunksPerBlock - c);
5743 } else if (tags.chunkId > 0) {
5744 /* chunkId > 0 so it is a data chunk... */
5745 unsigned int endpos;
5747 yaffs_SetChunkBit(dev, blk, c);
5750 in = yaffs_FindOrCreateObjectByNumber(dev,
5753 YAFFS_OBJECT_TYPE_FILE);
5754 /* PutChunkIntoFile checks for a clash (two data chunks with
5755 * the same chunkId).
5762 if (!yaffs_PutChunkIntoFile(in, tags.chunkId, chunk, 1))
5767 (tags.chunkId - 1) * dev->nDataBytesPerChunk +
5770 in->variantType == YAFFS_OBJECT_TYPE_FILE
5771 && in->variant.fileVariant.scannedFileSize <
5773 in->variant.fileVariant.
5774 scannedFileSize = endpos;
5775 if (!dev->useHeaderFileSize) {
5776 in->variant.fileVariant.
5778 in->variant.fileVariant.
5783 /* T((" %d %d data %d %d\n",blk,c,tags.objectId,tags.chunkId)); */
5785 /* chunkId == 0, so it is an ObjectHeader.
5786 * Thus, we read in the object header and make the object
5788 yaffs_SetChunkBit(dev, blk, c);
5791 result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk,
5795 oh = (yaffs_ObjectHeader *) chunkData;
5797 in = yaffs_FindObjectByNumber(dev,
5799 if (in && in->variantType != oh->type) {
5800 /* This should not happen, but somehow
5801 * Wev'e ended up with an objectId that has been reused but not yet
5802 * deleted, and worse still it has changed type. Delete the old object.
5805 yaffs_DeleteObject(in);
5810 in = yaffs_FindOrCreateObjectByNumber(dev,
5818 if (in && oh->shadowsObject > 0) {
5820 struct yaffs_ShadowFixerStruct *fixer;
5821 fixer = YMALLOC(sizeof(struct yaffs_ShadowFixerStruct));
5823 fixer->next = shadowFixerList;
5824 shadowFixerList = fixer;
5825 fixer->objectId = tags.objectId;
5826 fixer->shadowedId = oh->shadowsObject;
5831 if (in && in->valid) {
5832 /* We have already filled this one. We have a duplicate and need to resolve it. */
5834 unsigned existingSerial = in->serial;
5835 unsigned newSerial = tags.serialNumber;
5837 if (((existingSerial + 1) & 3) == newSerial) {
5838 /* Use new one - destroy the exisiting one */
5839 yaffs_DeleteChunk(dev,
5844 /* Use existing - destroy this one. */
5845 yaffs_DeleteChunk(dev, chunk, 1,
5850 if (in && !in->valid &&
5851 (tags.objectId == YAFFS_OBJECTID_ROOT ||
5852 tags.objectId == YAFFS_OBJECTID_LOSTNFOUND)) {
5853 /* We only load some info, don't fiddle with directory structure */
5855 in->variantType = oh->type;
5857 in->yst_mode = oh->yst_mode;
5858 #ifdef CONFIG_YAFFS_WINCE
5859 in->win_atime[0] = oh->win_atime[0];
5860 in->win_ctime[0] = oh->win_ctime[0];
5861 in->win_mtime[0] = oh->win_mtime[0];
5862 in->win_atime[1] = oh->win_atime[1];
5863 in->win_ctime[1] = oh->win_ctime[1];
5864 in->win_mtime[1] = oh->win_mtime[1];
5866 in->yst_uid = oh->yst_uid;
5867 in->yst_gid = oh->yst_gid;
5868 in->yst_atime = oh->yst_atime;
5869 in->yst_mtime = oh->yst_mtime;
5870 in->yst_ctime = oh->yst_ctime;
5871 in->yst_rdev = oh->yst_rdev;
5873 in->hdrChunk = chunk;
5874 in->serial = tags.serialNumber;
5876 } else if (in && !in->valid) {
5877 /* we need to load this info */
5880 in->variantType = oh->type;
5882 in->yst_mode = oh->yst_mode;
5883 #ifdef CONFIG_YAFFS_WINCE
5884 in->win_atime[0] = oh->win_atime[0];
5885 in->win_ctime[0] = oh->win_ctime[0];
5886 in->win_mtime[0] = oh->win_mtime[0];
5887 in->win_atime[1] = oh->win_atime[1];
5888 in->win_ctime[1] = oh->win_ctime[1];
5889 in->win_mtime[1] = oh->win_mtime[1];
5891 in->yst_uid = oh->yst_uid;
5892 in->yst_gid = oh->yst_gid;
5893 in->yst_atime = oh->yst_atime;
5894 in->yst_mtime = oh->yst_mtime;
5895 in->yst_ctime = oh->yst_ctime;
5896 in->yst_rdev = oh->yst_rdev;
5898 in->hdrChunk = chunk;
5899 in->serial = tags.serialNumber;
5901 yaffs_SetObjectName(in, oh->name);
5904 /* directory stuff...
5909 yaffs_FindOrCreateObjectByNumber
5910 (dev, oh->parentObjectId,
5911 YAFFS_OBJECT_TYPE_DIRECTORY);
5914 if (parent && parent->variantType ==
5915 YAFFS_OBJECT_TYPE_UNKNOWN) {
5916 /* Set up as a directory */
5917 parent->variantType =
5918 YAFFS_OBJECT_TYPE_DIRECTORY;
5919 YINIT_LIST_HEAD(&parent->variant.
5922 } else if (!parent || parent->variantType !=
5923 YAFFS_OBJECT_TYPE_DIRECTORY) {
5924 /* Hoosterman, another problem....
5925 * We're trying to use a non-directory as a directory
5928 T(YAFFS_TRACE_ERROR,
5930 ("yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found."
5932 parent = dev->lostNFoundDir;
5935 yaffs_AddObjectToDirectory(parent, in);
5937 if (0 && (parent == dev->deletedDir ||
5938 parent == dev->unlinkedDir)) {
5939 in->deleted = 1; /* If it is unlinked at start up then it wants deleting */
5940 dev->nDeletedFiles++;
5942 /* Note re hardlinks.
5943 * Since we might scan a hardlink before its equivalent object is scanned
5944 * we put them all in a list.
5945 * After scanning is complete, we should have all the objects, so we run through this
5946 * list and fix up all the chains.
5949 switch (in->variantType) {
5950 case YAFFS_OBJECT_TYPE_UNKNOWN:
5951 /* Todo got a problem */
5953 case YAFFS_OBJECT_TYPE_FILE:
5954 if (dev->useHeaderFileSize)
5956 in->variant.fileVariant.
5961 case YAFFS_OBJECT_TYPE_HARDLINK:
5962 in->variant.hardLinkVariant.
5963 equivalentObjectId =
5964 oh->equivalentObjectId;
5965 in->hardLinks.next =
5966 (struct ylist_head *)
5970 case YAFFS_OBJECT_TYPE_DIRECTORY:
5973 case YAFFS_OBJECT_TYPE_SPECIAL:
5976 case YAFFS_OBJECT_TYPE_SYMLINK:
5977 in->variant.symLinkVariant.alias =
5978 yaffs_CloneString(oh->alias);
5979 if (!in->variant.symLinkVariant.alias)
5985 if (parent == dev->deletedDir) {
5986 yaffs_DestroyObject(in);
5987 bi->hasShrinkHeader = 1;
5994 if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
5995 /* If we got this far while scanning, then the block is fully allocated.*/
5996 state = YAFFS_BLOCK_STATE_FULL;
5999 bi->blockState = state;
6001 /* Now let's see if it was dirty */
6002 if (bi->pagesInUse == 0 &&
6003 !bi->hasShrinkHeader &&
6004 bi->blockState == YAFFS_BLOCK_STATE_FULL) {
6005 yaffs_BlockBecameDirty(dev, blk);
6011 /* Ok, we've done all the scanning.
6012 * Fix up the hard link chains.
6013 * We should now have scanned all the objects, now it's time to add these
6017 yaffs_HardlinkFixup(dev, hardList);
6019 /* Fix up any shadowed objects */
6021 struct yaffs_ShadowFixerStruct *fixer;
6024 while (shadowFixerList) {
6025 fixer = shadowFixerList;
6026 shadowFixerList = fixer->next;
6027 /* Complete the rename transaction by deleting the shadowed object
6028 * then setting the object header to unshadowed.
6030 obj = yaffs_FindObjectByNumber(dev, fixer->shadowedId);
6032 yaffs_DeleteObject(obj);
6034 obj = yaffs_FindObjectByNumber(dev, fixer->objectId);
6037 yaffs_UpdateObjectHeader(obj, NULL, 1, 0, 0);
6043 yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
6048 T(YAFFS_TRACE_SCAN, (TSTR("yaffs_Scan ends" TENDSTR)));
6054 static void yaffs_CheckObjectDetailsLoaded(yaffs_Object *in)
6057 yaffs_ObjectHeader *oh;
6059 yaffs_ExtendedTags tags;
6061 int alloc_failed = 0;
6069 T(YAFFS_TRACE_SCAN, (TSTR("details for object %d %s loaded" TENDSTR),
6071 in->lazyLoaded ? "not yet" : "already"));
6074 if (in->lazyLoaded && in->hdrChunk > 0) {
6076 chunkData = yaffs_GetTempBuffer(dev, __LINE__);
6078 result = yaffs_ReadChunkWithTagsFromNAND(dev, in->hdrChunk, chunkData, &tags);
6079 oh = (yaffs_ObjectHeader *) chunkData;
6081 in->yst_mode = oh->yst_mode;
6082 #ifdef CONFIG_YAFFS_WINCE
6083 in->win_atime[0] = oh->win_atime[0];
6084 in->win_ctime[0] = oh->win_ctime[0];
6085 in->win_mtime[0] = oh->win_mtime[0];
6086 in->win_atime[1] = oh->win_atime[1];
6087 in->win_ctime[1] = oh->win_ctime[1];
6088 in->win_mtime[1] = oh->win_mtime[1];
6090 in->yst_uid = oh->yst_uid;
6091 in->yst_gid = oh->yst_gid;
6092 in->yst_atime = oh->yst_atime;
6093 in->yst_mtime = oh->yst_mtime;
6094 in->yst_ctime = oh->yst_ctime;
6095 in->yst_rdev = oh->yst_rdev;
6098 yaffs_SetObjectName(in, oh->name);
6100 if (in->variantType == YAFFS_OBJECT_TYPE_SYMLINK) {
6101 in->variant.symLinkVariant.alias =
6102 yaffs_CloneString(oh->alias);
6103 if (!in->variant.symLinkVariant.alias)
6104 alloc_failed = 1; /* Not returned to caller */
6107 yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
6111 static int yaffs_ScanBackwards(yaffs_Device *dev)
6113 yaffs_ExtendedTags tags;
6118 int nBlocksToScan = 0;
6124 yaffs_BlockState state;
6125 yaffs_Object *hardList = NULL;
6126 yaffs_BlockInfo *bi;
6127 __u32 sequenceNumber;
6128 yaffs_ObjectHeader *oh;
6130 yaffs_Object *parent;
6131 int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1;
6137 int foundChunksInBlock;
6138 int equivalentObjectId;
6139 int alloc_failed = 0;
6142 yaffs_BlockIndex *blockIndex = NULL;
6143 int altBlockIndex = 0;
6145 if (!dev->isYaffs2) {
6147 (TSTR("yaffs_ScanBackwards is only for YAFFS2!" TENDSTR)));
6153 ("yaffs_ScanBackwards starts intstartblk %d intendblk %d..."
6154 TENDSTR), dev->internalStartBlock, dev->internalEndBlock));
6157 dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER;
6159 blockIndex = YMALLOC(nBlocks * sizeof(yaffs_BlockIndex));
6162 blockIndex = YMALLOC_ALT(nBlocks * sizeof(yaffs_BlockIndex));
6168 (TSTR("yaffs_Scan() could not allocate block index!" TENDSTR)));
6172 dev->blocksInCheckpoint = 0;
6174 chunkData = yaffs_GetTempBuffer(dev, __LINE__);
6176 /* Scan all the blocks to determine their state */
6177 for (blk = dev->internalStartBlock; blk <= dev->internalEndBlock; blk++) {
6178 bi = yaffs_GetBlockInfo(dev, blk);
6179 yaffs_ClearChunkBits(dev, blk);
6181 bi->softDeletions = 0;
6183 yaffs_QueryInitialBlockState(dev, blk, &state, &sequenceNumber);
6185 bi->blockState = state;
6186 bi->sequenceNumber = sequenceNumber;
6188 if (bi->sequenceNumber == YAFFS_SEQUENCE_CHECKPOINT_DATA)
6189 bi->blockState = state = YAFFS_BLOCK_STATE_CHECKPOINT;
6190 if (bi->sequenceNumber == YAFFS_SEQUENCE_BAD_BLOCK)
6191 bi->blockState = state = YAFFS_BLOCK_STATE_DEAD;
6193 T(YAFFS_TRACE_SCAN_DEBUG,
6194 (TSTR("Block scanning block %d state %d seq %d" TENDSTR), blk,
6195 state, sequenceNumber));
6198 if (state == YAFFS_BLOCK_STATE_CHECKPOINT) {
6199 dev->blocksInCheckpoint++;
6201 } else if (state == YAFFS_BLOCK_STATE_DEAD) {
6202 T(YAFFS_TRACE_BAD_BLOCKS,
6203 (TSTR("block %d is bad" TENDSTR), blk));
6204 } else if (state == YAFFS_BLOCK_STATE_EMPTY) {
6205 T(YAFFS_TRACE_SCAN_DEBUG,
6206 (TSTR("Block empty " TENDSTR)));
6207 dev->nErasedBlocks++;
6208 dev->nFreeChunks += dev->nChunksPerBlock;
6209 } else if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
6211 /* Determine the highest sequence number */
6212 if (sequenceNumber >= YAFFS_LOWEST_SEQUENCE_NUMBER &&
6213 sequenceNumber < YAFFS_HIGHEST_SEQUENCE_NUMBER) {
6215 blockIndex[nBlocksToScan].seq = sequenceNumber;
6216 blockIndex[nBlocksToScan].block = blk;
6220 if (sequenceNumber >= dev->sequenceNumber)
6221 dev->sequenceNumber = sequenceNumber;
6223 /* TODO: Nasty sequence number! */
6226 ("Block scanning block %d has bad sequence number %d"
6227 TENDSTR), blk, sequenceNumber));
6234 (TSTR("%d blocks to be sorted..." TENDSTR), nBlocksToScan));
6240 /* Sort the blocks */
6241 #ifndef CONFIG_YAFFS_USE_OWN_SORT
6243 /* Use qsort now. */
6244 yaffs_qsort(blockIndex, nBlocksToScan, sizeof(yaffs_BlockIndex), ybicmp);
6248 /* Dungy old bubble sort... */
6250 yaffs_BlockIndex temp;
6254 for (i = 0; i < nBlocksToScan; i++)
6255 for (j = i + 1; j < nBlocksToScan; j++)
6256 if (blockIndex[i].seq > blockIndex[j].seq) {
6257 temp = blockIndex[j];
6258 blockIndex[j] = blockIndex[i];
6259 blockIndex[i] = temp;
6266 T(YAFFS_TRACE_SCAN, (TSTR("...done" TENDSTR)));
6268 /* Now scan the blocks looking at the data. */
6270 endIterator = nBlocksToScan - 1;
6271 T(YAFFS_TRACE_SCAN_DEBUG,
6272 (TSTR("%d blocks to be scanned" TENDSTR), nBlocksToScan));
6274 /* For each block.... backwards */
6275 for (blockIterator = endIterator; !alloc_failed && blockIterator >= startIterator;
6277 /* Cooperative multitasking! This loop can run for so
6278 long that watchdog timers expire. */
6281 /* get the block to scan in the correct order */
6282 blk = blockIndex[blockIterator].block;
6284 bi = yaffs_GetBlockInfo(dev, blk);
6287 state = bi->blockState;
6291 /* For each chunk in each block that needs scanning.... */
6292 foundChunksInBlock = 0;
6293 for (c = dev->nChunksPerBlock - 1;
6294 !alloc_failed && c >= 0 &&
6295 (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
6296 state == YAFFS_BLOCK_STATE_ALLOCATING); c--) {
6297 /* Scan backwards...
6298 * Read the tags and decide what to do
6301 chunk = blk * dev->nChunksPerBlock + c;
6303 result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk, NULL,
6306 /* Let's have a good look at this chunk... */
6308 if (!tags.chunkUsed) {
6309 /* An unassigned chunk in the block.
6310 * If there are used chunks after this one, then
6311 * it is a chunk that was skipped due to failing the erased
6312 * check. Just skip it so that it can be deleted.
6313 * But, more typically, We get here when this is an unallocated
6314 * chunk and his means that either the block is empty or
6315 * this is the one being allocated from
6318 if (foundChunksInBlock) {
6319 /* This is a chunk that was skipped due to failing the erased check */
6320 } else if (c == 0) {
6321 /* We're looking at the first chunk in the block so the block is unused */
6322 state = YAFFS_BLOCK_STATE_EMPTY;
6323 dev->nErasedBlocks++;
6325 if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
6326 state == YAFFS_BLOCK_STATE_ALLOCATING) {
6327 if (dev->sequenceNumber == bi->sequenceNumber) {
6328 /* this is the block being allocated from */
6332 (" Allocating from %d %d"
6335 state = YAFFS_BLOCK_STATE_ALLOCATING;
6336 dev->allocationBlock = blk;
6337 dev->allocationPage = c;
6338 dev->allocationBlockFinder = blk;
6340 /* This is a partially written block that is not
6341 * the current allocation block. This block must have
6342 * had a write failure, so set up for retirement.
6345 /* bi->needsRetiring = 1; ??? TODO */
6346 bi->gcPrioritise = 1;
6348 T(YAFFS_TRACE_ALWAYS,
6349 (TSTR("Partially written block %d detected" TENDSTR),
6357 } else if (tags.eccResult == YAFFS_ECC_RESULT_UNFIXED) {
6359 (TSTR(" Unfixed ECC in chunk(%d:%d), chunk ignored"TENDSTR),
6364 } else if (tags.chunkId > 0) {
6365 /* chunkId > 0 so it is a data chunk... */
6366 unsigned int endpos;
6368 (tags.chunkId - 1) * dev->nDataBytesPerChunk;
6370 foundChunksInBlock = 1;
6373 yaffs_SetChunkBit(dev, blk, c);
6376 in = yaffs_FindOrCreateObjectByNumber(dev,
6379 YAFFS_OBJECT_TYPE_FILE);
6386 in->variantType == YAFFS_OBJECT_TYPE_FILE
6388 in->variant.fileVariant.shrinkSize) {
6389 /* This has not been invalidated by a resize */
6390 if (!yaffs_PutChunkIntoFile(in, tags.chunkId,
6395 /* File size is calculated by looking at the data chunks if we have not
6396 * seen an object header yet. Stop this practice once we find an object header.
6400 1) * dev->nDataBytesPerChunk +
6403 if (!in->valid && /* have not got an object header yet */
6404 in->variant.fileVariant.
6405 scannedFileSize < endpos) {
6406 in->variant.fileVariant.
6407 scannedFileSize = endpos;
6408 in->variant.fileVariant.
6410 in->variant.fileVariant.
6415 /* This chunk has been invalidated by a resize, so delete */
6416 yaffs_DeleteChunk(dev, chunk, 1, __LINE__);
6420 /* chunkId == 0, so it is an ObjectHeader.
6421 * Thus, we read in the object header and make the object
6423 foundChunksInBlock = 1;
6425 yaffs_SetChunkBit(dev, blk, c);
6431 if (tags.extraHeaderInfoAvailable) {
6432 in = yaffs_FindOrCreateObjectByNumber
6433 (dev, tags.objectId,
6434 tags.extraObjectType);
6440 (!in->valid && dev->disableLazyLoad) ||
6441 tags.extraShadows ||
6443 (tags.objectId == YAFFS_OBJECTID_ROOT ||
6444 tags.objectId == YAFFS_OBJECTID_LOSTNFOUND))) {
6446 /* If we don't have valid info then we need to read the chunk
6447 * TODO In future we can probably defer reading the chunk and
6448 * living with invalid data until needed.
6451 result = yaffs_ReadChunkWithTagsFromNAND(dev,
6456 oh = (yaffs_ObjectHeader *) chunkData;
6458 if (dev->inbandTags) {
6459 /* Fix up the header if they got corrupted by inband tags */
6460 oh->shadowsObject = oh->inbandShadowsObject;
6461 oh->isShrink = oh->inbandIsShrink;
6465 in = yaffs_FindOrCreateObjectByNumber(dev, tags.objectId, oh->type);
6473 /* TODO Hoosterman we have a problem! */
6474 T(YAFFS_TRACE_ERROR,
6476 ("yaffs tragedy: Could not make object for object %d at chunk %d during scan"
6477 TENDSTR), tags.objectId, chunk));
6482 /* We have already filled this one.
6483 * We have a duplicate that will be discarded, but
6484 * we first have to suck out resize info if it is a file.
6487 if ((in->variantType == YAFFS_OBJECT_TYPE_FILE) &&
6489 oh->type == YAFFS_OBJECT_TYPE_FILE) ||
6490 (tags.extraHeaderInfoAvailable &&
6491 tags.extraObjectType == YAFFS_OBJECT_TYPE_FILE))) {
6493 (oh) ? oh->fileSize : tags.
6495 __u32 parentObjectId =
6497 parentObjectId : tags.
6498 extraParentObjectId;
6502 (oh) ? oh->isShrink : tags.
6503 extraIsShrinkHeader;
6505 /* If it is deleted (unlinked at start also means deleted)
6506 * we treat the file size as being zeroed at this point.
6508 if (parentObjectId ==
6509 YAFFS_OBJECTID_DELETED
6510 || parentObjectId ==
6511 YAFFS_OBJECTID_UNLINKED) {
6517 in->variant.fileVariant.
6518 shrinkSize > thisSize) {
6519 in->variant.fileVariant.
6525 bi->hasShrinkHeader = 1;
6528 /* Use existing - destroy this one. */
6529 yaffs_DeleteChunk(dev, chunk, 1, __LINE__);
6533 if (!in->valid && in->variantType !=
6534 (oh ? oh->type : tags.extraObjectType))
6535 T(YAFFS_TRACE_ERROR, (
6536 TSTR("yaffs tragedy: Bad object type, "
6537 TCONT("%d != %d, for object %d at chunk ")
6538 TCONT("%d during scan")
6540 oh->type : tags.extraObjectType,
6541 in->variantType, tags.objectId,
6545 (tags.objectId == YAFFS_OBJECTID_ROOT ||
6547 YAFFS_OBJECTID_LOSTNFOUND)) {
6548 /* We only load some info, don't fiddle with directory structure */
6552 in->variantType = oh->type;
6554 in->yst_mode = oh->yst_mode;
6555 #ifdef CONFIG_YAFFS_WINCE
6556 in->win_atime[0] = oh->win_atime[0];
6557 in->win_ctime[0] = oh->win_ctime[0];
6558 in->win_mtime[0] = oh->win_mtime[0];
6559 in->win_atime[1] = oh->win_atime[1];
6560 in->win_ctime[1] = oh->win_ctime[1];
6561 in->win_mtime[1] = oh->win_mtime[1];
6563 in->yst_uid = oh->yst_uid;
6564 in->yst_gid = oh->yst_gid;
6565 in->yst_atime = oh->yst_atime;
6566 in->yst_mtime = oh->yst_mtime;
6567 in->yst_ctime = oh->yst_ctime;
6568 in->yst_rdev = oh->yst_rdev;
6572 in->variantType = tags.extraObjectType;
6576 in->hdrChunk = chunk;
6578 } else if (!in->valid) {
6579 /* we need to load this info */
6582 in->hdrChunk = chunk;
6585 in->variantType = oh->type;
6587 in->yst_mode = oh->yst_mode;
6588 #ifdef CONFIG_YAFFS_WINCE
6589 in->win_atime[0] = oh->win_atime[0];
6590 in->win_ctime[0] = oh->win_ctime[0];
6591 in->win_mtime[0] = oh->win_mtime[0];
6592 in->win_atime[1] = oh->win_atime[1];
6593 in->win_ctime[1] = oh->win_ctime[1];
6594 in->win_mtime[1] = oh->win_mtime[1];
6596 in->yst_uid = oh->yst_uid;
6597 in->yst_gid = oh->yst_gid;
6598 in->yst_atime = oh->yst_atime;
6599 in->yst_mtime = oh->yst_mtime;
6600 in->yst_ctime = oh->yst_ctime;
6601 in->yst_rdev = oh->yst_rdev;
6604 if (oh->shadowsObject > 0)
6605 yaffs_HandleShadowedObject(dev,
6611 yaffs_SetObjectName(in, oh->name);
6613 yaffs_FindOrCreateObjectByNumber
6614 (dev, oh->parentObjectId,
6615 YAFFS_OBJECT_TYPE_DIRECTORY);
6617 fileSize = oh->fileSize;
6618 isShrink = oh->isShrink;
6619 equivalentObjectId = oh->equivalentObjectId;
6622 in->variantType = tags.extraObjectType;
6624 yaffs_FindOrCreateObjectByNumber
6625 (dev, tags.extraParentObjectId,
6626 YAFFS_OBJECT_TYPE_DIRECTORY);
6627 fileSize = tags.extraFileLength;
6628 isShrink = tags.extraIsShrinkHeader;
6629 equivalentObjectId = tags.extraEquivalentObjectId;
6638 /* directory stuff...
6642 if (parent && parent->variantType ==
6643 YAFFS_OBJECT_TYPE_UNKNOWN) {
6644 /* Set up as a directory */
6645 parent->variantType =
6646 YAFFS_OBJECT_TYPE_DIRECTORY;
6647 YINIT_LIST_HEAD(&parent->variant.
6650 } else if (!parent || parent->variantType !=
6651 YAFFS_OBJECT_TYPE_DIRECTORY) {
6652 /* Hoosterman, another problem....
6653 * We're trying to use a non-directory as a directory
6656 T(YAFFS_TRACE_ERROR,
6658 ("yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found."
6660 parent = dev->lostNFoundDir;
6663 yaffs_AddObjectToDirectory(parent, in);
6665 itsUnlinked = (parent == dev->deletedDir) ||
6666 (parent == dev->unlinkedDir);
6669 /* Mark the block as having a shrinkHeader */
6670 bi->hasShrinkHeader = 1;
6673 /* Note re hardlinks.
6674 * Since we might scan a hardlink before its equivalent object is scanned
6675 * we put them all in a list.
6676 * After scanning is complete, we should have all the objects, so we run
6677 * through this list and fix up all the chains.
6680 switch (in->variantType) {
6681 case YAFFS_OBJECT_TYPE_UNKNOWN:
6682 /* Todo got a problem */
6684 case YAFFS_OBJECT_TYPE_FILE:
6686 if (in->variant.fileVariant.
6687 scannedFileSize < fileSize) {
6688 /* This covers the case where the file size is greater
6689 * than where the data is
6690 * This will happen if the file is resized to be larger
6691 * than its current data extents.
6693 in->variant.fileVariant.fileSize = fileSize;
6694 in->variant.fileVariant.scannedFileSize =
6695 in->variant.fileVariant.fileSize;
6699 in->variant.fileVariant.shrinkSize > fileSize) {
6700 in->variant.fileVariant.shrinkSize = fileSize;
6704 case YAFFS_OBJECT_TYPE_HARDLINK:
6706 in->variant.hardLinkVariant.equivalentObjectId =
6708 in->hardLinks.next =
6709 (struct ylist_head *) hardList;
6713 case YAFFS_OBJECT_TYPE_DIRECTORY:
6716 case YAFFS_OBJECT_TYPE_SPECIAL:
6719 case YAFFS_OBJECT_TYPE_SYMLINK:
6721 in->variant.symLinkVariant.alias =
6722 yaffs_CloneString(oh->alias);
6723 if (!in->variant.symLinkVariant.alias)
6733 } /* End of scanning for each chunk */
6735 if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
6736 /* If we got this far while scanning, then the block is fully allocated. */
6737 state = YAFFS_BLOCK_STATE_FULL;
6740 bi->blockState = state;
6742 /* Now let's see if it was dirty */
6743 if (bi->pagesInUse == 0 &&
6744 !bi->hasShrinkHeader &&
6745 bi->blockState == YAFFS_BLOCK_STATE_FULL) {
6746 yaffs_BlockBecameDirty(dev, blk);
6752 YFREE_ALT(blockIndex);
6756 /* Ok, we've done all the scanning.
6757 * Fix up the hard link chains.
6758 * We should now have scanned all the objects, now it's time to add these
6761 yaffs_HardlinkFixup(dev, hardList);
6764 yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
6769 T(YAFFS_TRACE_SCAN, (TSTR("yaffs_ScanBackwards ends" TENDSTR)));
6774 /*------------------------------ Directory Functions ----------------------------- */
6776 static void yaffs_VerifyObjectInDirectory(yaffs_Object *obj)
6778 struct ylist_head *lh;
6779 yaffs_Object *listObj;
6784 T(YAFFS_TRACE_ALWAYS, (TSTR("No object to verify" TENDSTR)));
6789 if (yaffs_SkipVerification(obj->myDev))
6793 T(YAFFS_TRACE_ALWAYS, (TSTR("Object does not have parent" TENDSTR)));
6798 if (obj->parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
6799 T(YAFFS_TRACE_ALWAYS, (TSTR("Parent is not directory" TENDSTR)));
6803 /* Iterate through the objects in each hash entry */
6805 ylist_for_each(lh, &obj->parent->variant.directoryVariant.children) {
6807 listObj = ylist_entry(lh, yaffs_Object, siblings);
6808 yaffs_VerifyObject(listObj);
6815 T(YAFFS_TRACE_ALWAYS, (TSTR("Object in directory %d times" TENDSTR), count));
6820 static void yaffs_VerifyDirectory(yaffs_Object *directory)
6822 struct ylist_head *lh;
6823 yaffs_Object *listObj;
6830 if (yaffs_SkipFullVerification(directory->myDev))
6833 if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
6834 T(YAFFS_TRACE_ALWAYS, (TSTR("Directory has wrong type: %d" TENDSTR), directory->variantType));
6838 /* Iterate through the objects in each hash entry */
6840 ylist_for_each(lh, &directory->variant.directoryVariant.children) {
6842 listObj = ylist_entry(lh, yaffs_Object, siblings);
6843 if (listObj->parent != directory) {
6844 T(YAFFS_TRACE_ALWAYS, (TSTR("Object in directory list has wrong parent %p" TENDSTR), listObj->parent));
6847 yaffs_VerifyObjectInDirectory(listObj);
6853 *yaffs_UpdateParent() handles fixing a directories mtime and ctime when a new
6854 * link (ie. name) is created or deleted in the directory.
6857 * create dir/a : update dir's mtime/ctime
6858 * rm dir/a: update dir's mtime/ctime
6859 * modify dir/a: don't update dir's mtimme/ctime
6862 static void yaffs_UpdateParent(yaffs_Object *obj)
6868 obj->yst_mtime = obj->yst_ctime = Y_CURRENT_TIME;
6870 yaffs_UpdateObjectHeader(obj,NULL,0,0,0);
6873 static void yaffs_RemoveObjectFromDirectory(yaffs_Object *obj)
6875 yaffs_Device *dev = obj->myDev;
6876 yaffs_Object *parent;
6878 yaffs_VerifyObjectInDirectory(obj);
6879 parent = obj->parent;
6881 yaffs_VerifyDirectory(parent);
6883 if (dev && dev->removeObjectCallback)
6884 dev->removeObjectCallback(obj);
6887 ylist_del_init(&obj->siblings);
6890 yaffs_VerifyDirectory(parent);
6893 static void yaffs_AddObjectToDirectory(yaffs_Object *directory,
6897 T(YAFFS_TRACE_ALWAYS,
6899 ("tragedy: Trying to add an object to a null pointer directory"
6904 if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
6905 T(YAFFS_TRACE_ALWAYS,
6907 ("tragedy: Trying to add an object to a non-directory"
6912 if (obj->siblings.prev == NULL) {
6913 /* Not initialised */
6918 yaffs_VerifyDirectory(directory);
6920 yaffs_RemoveObjectFromDirectory(obj);
6924 ylist_add(&obj->siblings, &directory->variant.directoryVariant.children);
6925 obj->parent = directory;
6927 if (directory == obj->myDev->unlinkedDir
6928 || directory == obj->myDev->deletedDir) {
6930 obj->myDev->nUnlinkedFiles++;
6931 obj->renameAllowed = 0;
6934 yaffs_VerifyDirectory(directory);
6935 yaffs_VerifyObjectInDirectory(obj);
6938 yaffs_Object *yaffs_FindObjectByName(yaffs_Object *directory,
6943 struct ylist_head *i;
6944 YCHAR buffer[YAFFS_MAX_NAME_LENGTH + 1];
6952 T(YAFFS_TRACE_ALWAYS,
6954 ("tragedy: yaffs_FindObjectByName: null pointer directory"
6959 if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
6960 T(YAFFS_TRACE_ALWAYS,
6962 ("tragedy: yaffs_FindObjectByName: non-directory" TENDSTR)));
6966 sum = yaffs_CalcNameSum(name);
6968 ylist_for_each(i, &directory->variant.directoryVariant.children) {
6970 l = ylist_entry(i, yaffs_Object, siblings);
6972 if (l->parent != directory)
6975 yaffs_CheckObjectDetailsLoaded(l);
6977 /* Special case for lost-n-found */
6978 if (l->objectId == YAFFS_OBJECTID_LOSTNFOUND) {
6979 if (yaffs_strcmp(name, YAFFS_LOSTNFOUND_NAME) == 0)
6981 } else if (yaffs_SumCompare(l->sum, sum) || l->hdrChunk <= 0) {
6982 /* LostnFound chunk called Objxxx
6985 yaffs_GetObjectName(l, buffer,
6986 YAFFS_MAX_NAME_LENGTH + 1);
6987 if (yaffs_strncmp(name, buffer, YAFFS_MAX_NAME_LENGTH) == 0)
6998 int yaffs_ApplyToDirectoryChildren(yaffs_Object *theDir,
6999 int (*fn) (yaffs_Object *))
7001 struct ylist_head *i;
7005 T(YAFFS_TRACE_ALWAYS,
7007 ("tragedy: yaffs_FindObjectByName: null pointer directory"
7012 if (theDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
7013 T(YAFFS_TRACE_ALWAYS,
7015 ("tragedy: yaffs_FindObjectByName: non-directory" TENDSTR)));
7020 ylist_for_each(i, &theDir->variant.directoryVariant.children) {
7022 l = ylist_entry(i, yaffs_Object, siblings);
7033 /* GetEquivalentObject dereferences any hard links to get to the
7037 yaffs_Object *yaffs_GetEquivalentObject(yaffs_Object *obj)
7039 if (obj && obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) {
7040 /* We want the object id of the equivalent object, not this one */
7041 obj = obj->variant.hardLinkVariant.equivalentObject;
7042 yaffs_CheckObjectDetailsLoaded(obj);
7047 int yaffs_GetObjectName(yaffs_Object *obj, YCHAR *name, int buffSize)
7049 memset(name, 0, buffSize * sizeof(YCHAR));
7051 yaffs_CheckObjectDetailsLoaded(obj);
7053 if (obj->objectId == YAFFS_OBJECTID_LOSTNFOUND) {
7054 yaffs_strncpy(name, YAFFS_LOSTNFOUND_NAME, buffSize - 1);
7055 } else if (obj->hdrChunk <= 0) {
7057 YCHAR numString[20];
7058 YCHAR *x = &numString[19];
7059 unsigned v = obj->objectId;
7063 *x = '0' + (v % 10);
7066 /* make up a name */
7067 yaffs_strcpy(locName, YAFFS_LOSTNFOUND_PREFIX);
7068 yaffs_strcat(locName, x);
7069 yaffs_strncpy(name, locName, buffSize - 1);
7072 #ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM
7073 else if (obj->shortName[0])
7074 yaffs_strcpy(name, obj->shortName);
7078 __u8 *buffer = yaffs_GetTempBuffer(obj->myDev, __LINE__);
7080 yaffs_ObjectHeader *oh = (yaffs_ObjectHeader *) buffer;
7082 memset(buffer, 0, obj->myDev->nDataBytesPerChunk);
7084 if (obj->hdrChunk > 0) {
7085 result = yaffs_ReadChunkWithTagsFromNAND(obj->myDev,
7086 obj->hdrChunk, buffer,
7089 yaffs_strncpy(name, oh->name, buffSize - 1);
7091 yaffs_ReleaseTempBuffer(obj->myDev, buffer, __LINE__);
7094 return yaffs_strlen(name);
7097 int yaffs_GetObjectFileLength(yaffs_Object *obj)
7099 /* Dereference any hard linking */
7100 obj = yaffs_GetEquivalentObject(obj);
7102 if (obj->variantType == YAFFS_OBJECT_TYPE_FILE)
7103 return obj->variant.fileVariant.fileSize;
7104 if (obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK)
7105 return yaffs_strlen(obj->variant.symLinkVariant.alias);
7107 /* Only a directory should drop through to here */
7108 return obj->myDev->nDataBytesPerChunk;
7112 int yaffs_GetObjectLinkCount(yaffs_Object *obj)
7115 struct ylist_head *i;
7118 count++; /* the object itself */
7120 ylist_for_each(i, &obj->hardLinks)
7121 count++; /* add the hard links; */
7126 int yaffs_GetObjectInode(yaffs_Object *obj)
7128 obj = yaffs_GetEquivalentObject(obj);
7130 return obj->objectId;
7133 unsigned yaffs_GetObjectType(yaffs_Object *obj)
7135 obj = yaffs_GetEquivalentObject(obj);
7137 switch (obj->variantType) {
7138 case YAFFS_OBJECT_TYPE_FILE:
7141 case YAFFS_OBJECT_TYPE_DIRECTORY:
7144 case YAFFS_OBJECT_TYPE_SYMLINK:
7147 case YAFFS_OBJECT_TYPE_HARDLINK:
7150 case YAFFS_OBJECT_TYPE_SPECIAL:
7151 if (S_ISFIFO(obj->yst_mode))
7153 if (S_ISCHR(obj->yst_mode))
7155 if (S_ISBLK(obj->yst_mode))
7157 if (S_ISSOCK(obj->yst_mode))
7165 YCHAR *yaffs_GetSymlinkAlias(yaffs_Object *obj)
7167 obj = yaffs_GetEquivalentObject(obj);
7168 if (obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK)
7169 return yaffs_CloneString(obj->variant.symLinkVariant.alias);
7171 return yaffs_CloneString(_Y(""));
7174 #ifndef CONFIG_YAFFS_WINCE
7176 int yaffs_SetAttributes(yaffs_Object *obj, struct iattr *attr)
7178 unsigned int valid = attr->ia_valid;
7180 if (valid & ATTR_MODE)
7181 obj->yst_mode = attr->ia_mode;
7182 if (valid & ATTR_UID)
7183 obj->yst_uid = attr->ia_uid;
7184 if (valid & ATTR_GID)
7185 obj->yst_gid = attr->ia_gid;
7187 if (valid & ATTR_ATIME)
7188 obj->yst_atime = Y_TIME_CONVERT(attr->ia_atime);
7189 if (valid & ATTR_CTIME)
7190 obj->yst_ctime = Y_TIME_CONVERT(attr->ia_ctime);
7191 if (valid & ATTR_MTIME)
7192 obj->yst_mtime = Y_TIME_CONVERT(attr->ia_mtime);
7194 if (valid & ATTR_SIZE)
7195 yaffs_ResizeFile(obj, attr->ia_size);
7197 yaffs_UpdateObjectHeader(obj, NULL, 1, 0, 0);
7202 int yaffs_GetAttributes(yaffs_Object *obj, struct iattr *attr)
7204 unsigned int valid = 0;
7206 attr->ia_mode = obj->yst_mode;
7208 attr->ia_uid = obj->yst_uid;
7210 attr->ia_gid = obj->yst_gid;
7213 Y_TIME_CONVERT(attr->ia_atime) = obj->yst_atime;
7214 valid |= ATTR_ATIME;
7215 Y_TIME_CONVERT(attr->ia_ctime) = obj->yst_ctime;
7216 valid |= ATTR_CTIME;
7217 Y_TIME_CONVERT(attr->ia_mtime) = obj->yst_mtime;
7218 valid |= ATTR_MTIME;
7220 attr->ia_size = yaffs_GetFileSize(obj);
7223 attr->ia_valid = valid;
7231 int yaffs_DumpObject(yaffs_Object *obj)
7235 yaffs_GetObjectName(obj, name, YAFFS_MAX_NAME_LENGTH + 1);
7237 T(YAFFS_TRACE_ALWAYS,
7239 ("Object %d, inode %d \"%s\"\n dirty %d valid %d serial %d sum %d"
7240 " chunk %d type %d size %d\n"
7241 TENDSTR), obj->objectId, yaffs_GetObjectInode(obj), name,
7242 obj->dirty, obj->valid, obj->serial, obj->sum, obj->hdrChunk,
7243 yaffs_GetObjectType(obj), yaffs_GetObjectFileLength(obj)));
7249 /*---------------------------- Initialisation code -------------------------------------- */
7251 static int yaffs_CheckDevFunctions(const yaffs_Device *dev)
7254 /* Common functions, gotta have */
7255 if (!dev->eraseBlockInNAND || !dev->initialiseNAND)
7258 #ifdef CONFIG_YAFFS_YAFFS2
7260 /* Can use the "with tags" style interface for yaffs1 or yaffs2 */
7261 if (dev->writeChunkWithTagsToNAND &&
7262 dev->readChunkWithTagsFromNAND &&
7263 !dev->writeChunkToNAND &&
7264 !dev->readChunkFromNAND &&
7265 dev->markNANDBlockBad && dev->queryNANDBlock)
7269 /* Can use the "spare" style interface for yaffs1 */
7270 if (!dev->isYaffs2 &&
7271 !dev->writeChunkWithTagsToNAND &&
7272 !dev->readChunkWithTagsFromNAND &&
7273 dev->writeChunkToNAND &&
7274 dev->readChunkFromNAND &&
7275 !dev->markNANDBlockBad && !dev->queryNANDBlock)
7282 static int yaffs_CreateInitialDirectories(yaffs_Device *dev)
7284 /* Initialise the unlinked, deleted, root and lost and found directories */
7286 dev->lostNFoundDir = dev->rootDir = NULL;
7287 dev->unlinkedDir = dev->deletedDir = NULL;
7290 yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_UNLINKED, S_IFDIR);
7293 yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_DELETED, S_IFDIR);
7296 yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_ROOT,
7297 YAFFS_ROOT_MODE | S_IFDIR);
7298 dev->lostNFoundDir =
7299 yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_LOSTNFOUND,
7300 YAFFS_LOSTNFOUND_MODE | S_IFDIR);
7302 if (dev->lostNFoundDir && dev->rootDir && dev->unlinkedDir && dev->deletedDir) {
7303 yaffs_AddObjectToDirectory(dev->rootDir, dev->lostNFoundDir);
7310 int yaffs_GutsInitialise(yaffs_Device *dev)
7312 int init_failed = 0;
7316 T(YAFFS_TRACE_TRACING, (TSTR("yaffs: yaffs_GutsInitialise()" TENDSTR)));
7318 /* Check stuff that must be set */
7321 T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Need a device" TENDSTR)));
7325 dev->internalStartBlock = dev->startBlock;
7326 dev->internalEndBlock = dev->endBlock;
7327 dev->blockOffset = 0;
7328 dev->chunkOffset = 0;
7329 dev->nFreeChunks = 0;
7333 if (dev->startBlock == 0) {
7334 dev->internalStartBlock = dev->startBlock + 1;
7335 dev->internalEndBlock = dev->endBlock + 1;
7336 dev->blockOffset = 1;
7337 dev->chunkOffset = dev->nChunksPerBlock;
7340 /* Check geometry parameters. */
7342 if ((!dev->inbandTags && dev->isYaffs2 && dev->totalBytesPerChunk < 1024) ||
7343 (!dev->isYaffs2 && dev->totalBytesPerChunk < 512) ||
7344 (dev->inbandTags && !dev->isYaffs2) ||
7345 dev->nChunksPerBlock < 2 ||
7346 dev->nReservedBlocks < 2 ||
7347 dev->internalStartBlock <= 0 ||
7348 dev->internalEndBlock <= 0 ||
7349 dev->internalEndBlock <= (dev->internalStartBlock + dev->nReservedBlocks + 2)) { /* otherwise it is too small */
7350 T(YAFFS_TRACE_ALWAYS,
7352 ("yaffs: NAND geometry problems: chunk size %d, type is yaffs%s, inbandTags %d "
7353 TENDSTR), dev->totalBytesPerChunk, dev->isYaffs2 ? "2" : "", dev->inbandTags));
7357 if (yaffs_InitialiseNAND(dev) != YAFFS_OK) {
7358 T(YAFFS_TRACE_ALWAYS,
7359 (TSTR("yaffs: InitialiseNAND failed" TENDSTR)));
7363 /* Sort out space for inband tags, if required */
7364 if (dev->inbandTags)
7365 dev->nDataBytesPerChunk = dev->totalBytesPerChunk - sizeof(yaffs_PackedTags2TagsPart);
7367 dev->nDataBytesPerChunk = dev->totalBytesPerChunk;
7369 /* Got the right mix of functions? */
7370 if (!yaffs_CheckDevFunctions(dev)) {
7371 /* Function missing */
7372 T(YAFFS_TRACE_ALWAYS,
7374 ("yaffs: device function(s) missing or wrong\n" TENDSTR)));
7379 /* This is really a compilation check. */
7380 if (!yaffs_CheckStructures()) {
7381 T(YAFFS_TRACE_ALWAYS,
7382 (TSTR("yaffs_CheckStructures failed\n" TENDSTR)));
7386 if (dev->isMounted) {
7387 T(YAFFS_TRACE_ALWAYS,
7388 (TSTR("yaffs: device already mounted\n" TENDSTR)));
7392 /* Finished with most checks. One or two more checks happen later on too. */
7396 /* OK now calculate a few things for the device */
7399 * Calculate all the chunk size manipulation numbers:
7401 x = dev->nDataBytesPerChunk;
7402 /* We always use dev->chunkShift and dev->chunkDiv */
7403 dev->chunkShift = Shifts(x);
7404 x >>= dev->chunkShift;
7406 /* We only use chunk mask if chunkDiv is 1 */
7407 dev->chunkMask = (1<<dev->chunkShift) - 1;
7410 * Calculate chunkGroupBits.
7411 * We need to find the next power of 2 > than internalEndBlock
7414 x = dev->nChunksPerBlock * (dev->internalEndBlock + 1);
7418 /* Set up tnode width if wide tnodes are enabled. */
7419 if (!dev->wideTnodesDisabled) {
7420 /* bits must be even so that we end up with 32-bit words */
7424 dev->tnodeWidth = 16;
7426 dev->tnodeWidth = bits;
7428 dev->tnodeWidth = 16;
7430 dev->tnodeMask = (1<<dev->tnodeWidth)-1;
7432 /* Level0 Tnodes are 16 bits or wider (if wide tnodes are enabled),
7433 * so if the bitwidth of the
7434 * chunk range we're using is greater than 16 we need
7435 * to figure out chunk shift and chunkGroupSize
7438 if (bits <= dev->tnodeWidth)
7439 dev->chunkGroupBits = 0;
7441 dev->chunkGroupBits = bits - dev->tnodeWidth;
7444 dev->chunkGroupSize = 1 << dev->chunkGroupBits;
7446 if (dev->nChunksPerBlock < dev->chunkGroupSize) {
7447 /* We have a problem because the soft delete won't work if
7448 * the chunk group size > chunks per block.
7449 * This can be remedied by using larger "virtual blocks".
7451 T(YAFFS_TRACE_ALWAYS,
7452 (TSTR("yaffs: chunk group too large\n" TENDSTR)));
7457 /* OK, we've finished verifying the device, lets continue with initialisation */
7459 /* More device initialisation */
7460 dev->garbageCollections = 0;
7461 dev->passiveGarbageCollections = 0;
7462 dev->currentDirtyChecker = 0;
7463 dev->bufferedBlock = -1;
7464 dev->doingBufferedBlockRewrite = 0;
7465 dev->nDeletedFiles = 0;
7466 dev->nBackgroundDeletions = 0;
7467 dev->nUnlinkedFiles = 0;
7469 dev->eccUnfixed = 0;
7470 dev->tagsEccFixed = 0;
7471 dev->tagsEccUnfixed = 0;
7472 dev->nErasureFailures = 0;
7473 dev->nErasedBlocks = 0;
7475 dev->hasPendingPrioritisedGCs = 1; /* Assume the worst for now, will get fixed on first GC */
7477 /* Initialise temporary buffers and caches. */
7478 if (!yaffs_InitialiseTempBuffers(dev))
7481 dev->srCache = NULL;
7482 dev->gcCleanupList = NULL;
7486 dev->nShortOpCaches > 0) {
7489 int srCacheBytes = dev->nShortOpCaches * sizeof(yaffs_ChunkCache);
7491 if (dev->nShortOpCaches > YAFFS_MAX_SHORT_OP_CACHES)
7492 dev->nShortOpCaches = YAFFS_MAX_SHORT_OP_CACHES;
7494 dev->srCache = YMALLOC(srCacheBytes);
7496 buf = (__u8 *) dev->srCache;
7499 memset(dev->srCache, 0, srCacheBytes);
7501 for (i = 0; i < dev->nShortOpCaches && buf; i++) {
7502 dev->srCache[i].object = NULL;
7503 dev->srCache[i].lastUse = 0;
7504 dev->srCache[i].dirty = 0;
7505 dev->srCache[i].data = buf = YMALLOC_DMA(dev->totalBytesPerChunk);
7516 dev->gcCleanupList = YMALLOC(dev->nChunksPerBlock * sizeof(__u32));
7517 if (!dev->gcCleanupList)
7522 dev->useHeaderFileSize = 1;
7524 if (!init_failed && !yaffs_InitialiseBlocks(dev))
7527 yaffs_InitialiseTnodes(dev);
7528 yaffs_InitialiseObjects(dev);
7530 if (!init_failed && !yaffs_CreateInitialDirectories(dev))
7535 /* Now scan the flash. */
7536 if (dev->isYaffs2) {
7537 if (yaffs_CheckpointRestore(dev)) {
7538 yaffs_CheckObjectDetailsLoaded(dev->rootDir);
7539 T(YAFFS_TRACE_ALWAYS,
7540 (TSTR("yaffs: restored from checkpoint" TENDSTR)));
7543 /* Clean up the mess caused by an aborted checkpoint load
7544 * and scan backwards.
7546 yaffs_DeinitialiseBlocks(dev);
7547 yaffs_DeinitialiseTnodes(dev);
7548 yaffs_DeinitialiseObjects(dev);
7551 dev->nErasedBlocks = 0;
7552 dev->nFreeChunks = 0;
7553 dev->allocationBlock = -1;
7554 dev->allocationPage = -1;
7555 dev->nDeletedFiles = 0;
7556 dev->nUnlinkedFiles = 0;
7557 dev->nBackgroundDeletions = 0;
7558 dev->oldestDirtySequence = 0;
7560 if (!init_failed && !yaffs_InitialiseBlocks(dev))
7563 yaffs_InitialiseTnodes(dev);
7564 yaffs_InitialiseObjects(dev);
7566 if (!init_failed && !yaffs_CreateInitialDirectories(dev))
7569 if (!init_failed && !yaffs_ScanBackwards(dev))
7572 } else if (!yaffs_Scan(dev))
7575 yaffs_StripDeletedObjects(dev);
7576 yaffs_FixHangingObjects(dev);
7577 if(dev->emptyLostAndFound)
7578 yaffs_EmptyLostAndFound(dev);
7582 /* Clean up the mess */
7583 T(YAFFS_TRACE_TRACING,
7584 (TSTR("yaffs: yaffs_GutsInitialise() aborted.\n" TENDSTR)));
7586 yaffs_Deinitialise(dev);
7590 /* Zero out stats */
7591 dev->nPageReads = 0;
7592 dev->nPageWrites = 0;
7593 dev->nBlockErasures = 0;
7595 dev->nRetriedWrites = 0;
7597 dev->nRetiredBlocks = 0;
7599 yaffs_VerifyFreeChunks(dev);
7600 yaffs_VerifyBlocks(dev);
7602 /* Clean up any aborted checkpoint data */
7603 if(!dev->isCheckpointed && dev->blocksInCheckpoint > 0)
7604 yaffs_InvalidateCheckpoint(dev);
7606 T(YAFFS_TRACE_TRACING,
7607 (TSTR("yaffs: yaffs_GutsInitialise() done.\n" TENDSTR)));
7612 void yaffs_Deinitialise(yaffs_Device *dev)
7614 if (dev->isMounted) {
7617 yaffs_DeinitialiseBlocks(dev);
7618 yaffs_DeinitialiseTnodes(dev);
7619 yaffs_DeinitialiseObjects(dev);
7620 if (dev->nShortOpCaches > 0 &&
7623 for (i = 0; i < dev->nShortOpCaches; i++) {
7624 if (dev->srCache[i].data)
7625 YFREE(dev->srCache[i].data);
7626 dev->srCache[i].data = NULL;
7629 YFREE(dev->srCache);
7630 dev->srCache = NULL;
7633 YFREE(dev->gcCleanupList);
7635 for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++)
7636 YFREE(dev->tempBuffer[i].buffer);
7640 if (dev->deinitialiseNAND)
7641 dev->deinitialiseNAND(dev);
7645 static int yaffs_CountFreeChunks(yaffs_Device *dev)
7650 yaffs_BlockInfo *blk;
7652 for (nFree = 0, b = dev->internalStartBlock; b <= dev->internalEndBlock;
7654 blk = yaffs_GetBlockInfo(dev, b);
7656 switch (blk->blockState) {
7657 case YAFFS_BLOCK_STATE_EMPTY:
7658 case YAFFS_BLOCK_STATE_ALLOCATING:
7659 case YAFFS_BLOCK_STATE_COLLECTING:
7660 case YAFFS_BLOCK_STATE_FULL:
7662 (dev->nChunksPerBlock - blk->pagesInUse +
7663 blk->softDeletions);
7673 int yaffs_GetNumberOfFreeChunks(yaffs_Device *dev)
7675 /* This is what we report to the outside world */
7678 int nDirtyCacheChunks;
7679 int blocksForCheckpoint;
7683 nFree = dev->nFreeChunks;
7685 nFree = yaffs_CountFreeChunks(dev);
7688 nFree += dev->nDeletedFiles;
7690 /* Now count the number of dirty chunks in the cache and subtract those */
7692 for (nDirtyCacheChunks = 0, i = 0; i < dev->nShortOpCaches; i++) {
7693 if (dev->srCache[i].dirty)
7694 nDirtyCacheChunks++;
7697 nFree -= nDirtyCacheChunks;
7699 nFree -= ((dev->nReservedBlocks + 1) * dev->nChunksPerBlock);
7701 /* Now we figure out how much to reserve for the checkpoint and report that... */
7702 blocksForCheckpoint = yaffs_CalcCheckpointBlocksRequired(dev) - dev->blocksInCheckpoint;
7703 if (blocksForCheckpoint < 0)
7704 blocksForCheckpoint = 0;
7706 nFree -= (blocksForCheckpoint * dev->nChunksPerBlock);
7715 static int yaffs_freeVerificationFailures;
7717 static void yaffs_VerifyFreeChunks(yaffs_Device *dev)
7722 if (yaffs_SkipVerification(dev))
7725 counted = yaffs_CountFreeChunks(dev);
7727 difference = dev->nFreeChunks - counted;
7730 T(YAFFS_TRACE_ALWAYS,
7731 (TSTR("Freechunks verification failure %d %d %d" TENDSTR),
7732 dev->nFreeChunks, counted, difference));
7733 yaffs_freeVerificationFailures++;
7737 /*---------------------------------------- YAFFS test code ----------------------*/
7739 #define yaffs_CheckStruct(structure, syze, name) \
7741 if (sizeof(structure) != syze) { \
7742 T(YAFFS_TRACE_ALWAYS, (TSTR("%s should be %d but is %d\n" TENDSTR),\
7743 name, syze, sizeof(structure))); \
7744 return YAFFS_FAIL; \
7748 static int yaffs_CheckStructures(void)
7750 /* yaffs_CheckStruct(yaffs_Tags,8,"yaffs_Tags"); */
7751 /* yaffs_CheckStruct(yaffs_TagsUnion,8,"yaffs_TagsUnion"); */
7752 /* yaffs_CheckStruct(yaffs_Spare,16,"yaffs_Spare"); */
7753 #ifndef CONFIG_YAFFS_TNODE_LIST_DEBUG
7754 yaffs_CheckStruct(yaffs_Tnode, 2 * YAFFS_NTNODES_LEVEL0, "yaffs_Tnode");
7756 #ifndef CONFIG_YAFFS_WINCE
7757 yaffs_CheckStruct(yaffs_ObjectHeader, 512, "yaffs_ObjectHeader");