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 1.98 2009-12-07 01:17:33 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_strnlen(name,YAFFS_SHORT_NAME_LENGTH+1) <= 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) {
1875 T(YAFFS_TRACE_ALLOCATE,
1876 (TSTR("yaffs: Could not allocate more objects" TENDSTR)));
1880 /* Hook them into the free list */
1881 for (i = 0; i < nObjects - 1; i++) {
1882 newObjects[i].siblings.next =
1883 (struct ylist_head *)(&newObjects[i + 1]);
1886 newObjects[nObjects - 1].siblings.next = (void *)dev->freeObjects;
1887 dev->freeObjects = newObjects;
1888 dev->nFreeObjects += nObjects;
1889 dev->nObjectsCreated += nObjects;
1891 /* Now add this bunch of Objects to a list for freeing up. */
1893 list->objects = newObjects;
1894 list->next = dev->allocatedObjectList;
1895 dev->allocatedObjectList = list;
1901 /* AllocateEmptyObject gets us a clean Object. Tries to make allocate more if we run out */
1902 static yaffs_Object *yaffs_AllocateEmptyObject(yaffs_Device *dev)
1904 yaffs_Object *tn = NULL;
1906 #ifdef VALGRIND_TEST
1907 tn = YMALLOC(sizeof(yaffs_Object));
1909 /* If there are none left make more */
1910 if (!dev->freeObjects)
1911 yaffs_CreateFreeObjects(dev, YAFFS_ALLOCATION_NOBJECTS);
1913 if (dev->freeObjects) {
1914 tn = dev->freeObjects;
1916 (yaffs_Object *) (dev->freeObjects->siblings.next);
1917 dev->nFreeObjects--;
1921 /* Now sweeten it up... */
1923 memset(tn, 0, sizeof(yaffs_Object));
1924 tn->beingCreated = 1;
1928 tn->variantType = YAFFS_OBJECT_TYPE_UNKNOWN;
1929 YINIT_LIST_HEAD(&(tn->hardLinks));
1930 YINIT_LIST_HEAD(&(tn->hashLink));
1931 YINIT_LIST_HEAD(&tn->siblings);
1934 /* Now make the directory sane */
1936 tn->parent = dev->rootDir;
1937 ylist_add(&(tn->siblings), &dev->rootDir->variant.directoryVariant.children);
1940 /* Add it to the lost and found directory.
1941 * NB Can't put root or lostNFound in lostNFound so
1942 * check if lostNFound exists first
1944 if (dev->lostNFoundDir)
1945 yaffs_AddObjectToDirectory(dev->lostNFoundDir, tn);
1947 tn->beingCreated = 0;
1950 dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
1955 static yaffs_Object *yaffs_CreateFakeDirectory(yaffs_Device *dev, int number,
1960 yaffs_CreateNewObject(dev, number, YAFFS_OBJECT_TYPE_DIRECTORY);
1962 obj->fake = 1; /* it is fake so it might have no NAND presence... */
1963 obj->renameAllowed = 0; /* ... and we're not allowed to rename it... */
1964 obj->unlinkAllowed = 0; /* ... or unlink it */
1967 obj->yst_mode = mode;
1969 obj->hdrChunk = 0; /* Not a valid chunk. */
1976 static void yaffs_UnhashObject(yaffs_Object *tn)
1979 yaffs_Device *dev = tn->myDev;
1981 /* If it is still linked into the bucket list, free from the list */
1982 if (!ylist_empty(&tn->hashLink)) {
1983 ylist_del_init(&tn->hashLink);
1984 bucket = yaffs_HashFunction(tn->objectId);
1985 dev->objectBucket[bucket].count--;
1989 /* FreeObject frees up a Object and puts it back on the free list */
1990 static void yaffs_FreeObject(yaffs_Object *tn)
1992 yaffs_Device *dev = tn->myDev;
1995 T(YAFFS_TRACE_OS, (TSTR("FreeObject %p inode %p"TENDSTR), tn, tn->myInode));
2000 if (!ylist_empty(&tn->siblings))
2006 /* We're still hooked up to a cached inode.
2007 * Don't delete now, but mark for later deletion
2009 tn->deferedFree = 1;
2014 yaffs_UnhashObject(tn);
2016 #ifdef VALGRIND_TEST
2020 /* Link into the free list. */
2021 tn->siblings.next = (struct ylist_head *)(dev->freeObjects);
2022 dev->freeObjects = tn;
2023 dev->nFreeObjects++;
2025 dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
2030 void yaffs_HandleDeferedFree(yaffs_Object *obj)
2032 if (obj->deferedFree)
2033 yaffs_FreeObject(obj);
2038 static void yaffs_DeinitialiseObjects(yaffs_Device *dev)
2040 /* Free the list of allocated Objects */
2042 yaffs_ObjectList *tmp;
2044 while (dev->allocatedObjectList) {
2045 tmp = dev->allocatedObjectList->next;
2046 YFREE(dev->allocatedObjectList->objects);
2047 YFREE(dev->allocatedObjectList);
2049 dev->allocatedObjectList = tmp;
2052 dev->freeObjects = NULL;
2053 dev->nFreeObjects = 0;
2056 static void yaffs_InitialiseObjects(yaffs_Device *dev)
2060 dev->allocatedObjectList = NULL;
2061 dev->freeObjects = NULL;
2062 dev->nFreeObjects = 0;
2064 for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
2065 YINIT_LIST_HEAD(&dev->objectBucket[i].list);
2066 dev->objectBucket[i].count = 0;
2070 static int yaffs_FindNiceObjectBucket(yaffs_Device *dev)
2075 int lowest = 999999;
2077 /* First let's see if we can find one that's empty. */
2079 for (i = 0; i < 10 && lowest > 0; i++) {
2081 x %= YAFFS_NOBJECT_BUCKETS;
2082 if (dev->objectBucket[x].count < lowest) {
2083 lowest = dev->objectBucket[x].count;
2089 /* If we didn't find an empty list, then try
2090 * looking a bit further for a short one
2093 for (i = 0; i < 10 && lowest > 3; i++) {
2095 x %= YAFFS_NOBJECT_BUCKETS;
2096 if (dev->objectBucket[x].count < lowest) {
2097 lowest = dev->objectBucket[x].count;
2106 static int yaffs_CreateNewObjectNumber(yaffs_Device *dev)
2108 int bucket = yaffs_FindNiceObjectBucket(dev);
2110 /* Now find an object value that has not already been taken
2111 * by scanning the list.
2115 struct ylist_head *i;
2117 __u32 n = (__u32) bucket;
2119 /* yaffs_CheckObjectHashSanity(); */
2123 n += YAFFS_NOBJECT_BUCKETS;
2124 if (1 || dev->objectBucket[bucket].count > 0) {
2125 ylist_for_each(i, &dev->objectBucket[bucket].list) {
2126 /* If there is already one in the list */
2127 if (i && ylist_entry(i, yaffs_Object,
2128 hashLink)->objectId == n) {
2138 static void yaffs_HashObject(yaffs_Object *in)
2140 int bucket = yaffs_HashFunction(in->objectId);
2141 yaffs_Device *dev = in->myDev;
2143 ylist_add(&in->hashLink, &dev->objectBucket[bucket].list);
2144 dev->objectBucket[bucket].count++;
2147 yaffs_Object *yaffs_FindObjectByNumber(yaffs_Device *dev, __u32 number)
2149 int bucket = yaffs_HashFunction(number);
2150 struct ylist_head *i;
2153 ylist_for_each(i, &dev->objectBucket[bucket].list) {
2154 /* Look if it is in the list */
2156 in = ylist_entry(i, yaffs_Object, hashLink);
2157 if (in->objectId == number) {
2159 /* Don't tell the VFS about this one if it is defered free */
2160 if (in->deferedFree)
2172 yaffs_Object *yaffs_CreateNewObject(yaffs_Device *dev, int number,
2173 yaffs_ObjectType type)
2175 yaffs_Object *theObject;
2176 yaffs_Tnode *tn = NULL;
2179 number = yaffs_CreateNewObjectNumber(dev);
2181 if (type == YAFFS_OBJECT_TYPE_FILE) {
2182 tn = yaffs_GetTnode(dev);
2187 theObject = yaffs_AllocateEmptyObject(dev);
2190 yaffs_FreeTnode(dev,tn);
2196 theObject->fake = 0;
2197 theObject->renameAllowed = 1;
2198 theObject->unlinkAllowed = 1;
2199 theObject->objectId = number;
2200 yaffs_HashObject(theObject);
2201 theObject->variantType = type;
2202 #ifdef CONFIG_YAFFS_WINCE
2203 yfsd_WinFileTimeNow(theObject->win_atime);
2204 theObject->win_ctime[0] = theObject->win_mtime[0] =
2205 theObject->win_atime[0];
2206 theObject->win_ctime[1] = theObject->win_mtime[1] =
2207 theObject->win_atime[1];
2211 theObject->yst_atime = theObject->yst_mtime =
2212 theObject->yst_ctime = Y_CURRENT_TIME;
2215 case YAFFS_OBJECT_TYPE_FILE:
2216 theObject->variant.fileVariant.fileSize = 0;
2217 theObject->variant.fileVariant.scannedFileSize = 0;
2218 theObject->variant.fileVariant.shrinkSize = 0xFFFFFFFF; /* max __u32 */
2219 theObject->variant.fileVariant.topLevel = 0;
2220 theObject->variant.fileVariant.top = tn;
2222 case YAFFS_OBJECT_TYPE_DIRECTORY:
2223 YINIT_LIST_HEAD(&theObject->variant.directoryVariant.
2226 case YAFFS_OBJECT_TYPE_SYMLINK:
2227 case YAFFS_OBJECT_TYPE_HARDLINK:
2228 case YAFFS_OBJECT_TYPE_SPECIAL:
2229 /* No action required */
2231 case YAFFS_OBJECT_TYPE_UNKNOWN:
2232 /* todo this should not happen */
2240 static yaffs_Object *yaffs_FindOrCreateObjectByNumber(yaffs_Device *dev,
2242 yaffs_ObjectType type)
2244 yaffs_Object *theObject = NULL;
2247 theObject = yaffs_FindObjectByNumber(dev, number);
2250 theObject = yaffs_CreateNewObject(dev, number, type);
2257 static YCHAR *yaffs_CloneString(const YCHAR *str)
2259 YCHAR *newStr = NULL;
2265 len = yaffs_strnlen(str,YAFFS_MAX_ALIAS_LENGTH);
2266 newStr = YMALLOC((len + 1) * sizeof(YCHAR));
2268 yaffs_strncpy(newStr, str,len);
2276 * Mknod (create) a new object.
2277 * equivalentObject only has meaning for a hard link;
2278 * aliasString only has meaning for a symlink.
2279 * rdev only has meaning for devices (a subset of special objects)
2282 static yaffs_Object *yaffs_MknodObject(yaffs_ObjectType type,
2283 yaffs_Object *parent,
2288 yaffs_Object *equivalentObject,
2289 const YCHAR *aliasString, __u32 rdev)
2294 yaffs_Device *dev = parent->myDev;
2296 /* Check if the entry exists. If it does then fail the call since we don't want a dup.*/
2297 if (yaffs_FindObjectByName(parent, name))
2300 if (type == YAFFS_OBJECT_TYPE_SYMLINK) {
2301 str = yaffs_CloneString(aliasString);
2306 in = yaffs_CreateNewObject(dev, -1, type);
2320 in->variantType = type;
2322 in->yst_mode = mode;
2324 #ifdef CONFIG_YAFFS_WINCE
2325 yfsd_WinFileTimeNow(in->win_atime);
2326 in->win_ctime[0] = in->win_mtime[0] = in->win_atime[0];
2327 in->win_ctime[1] = in->win_mtime[1] = in->win_atime[1];
2330 in->yst_atime = in->yst_mtime = in->yst_ctime = Y_CURRENT_TIME;
2332 in->yst_rdev = rdev;
2336 in->nDataChunks = 0;
2338 yaffs_SetObjectName(in, name);
2341 yaffs_AddObjectToDirectory(parent, in);
2343 in->myDev = parent->myDev;
2346 case YAFFS_OBJECT_TYPE_SYMLINK:
2347 in->variant.symLinkVariant.alias = str;
2349 case YAFFS_OBJECT_TYPE_HARDLINK:
2350 in->variant.hardLinkVariant.equivalentObject =
2352 in->variant.hardLinkVariant.equivalentObjectId =
2353 equivalentObject->objectId;
2354 ylist_add(&in->hardLinks, &equivalentObject->hardLinks);
2356 case YAFFS_OBJECT_TYPE_FILE:
2357 case YAFFS_OBJECT_TYPE_DIRECTORY:
2358 case YAFFS_OBJECT_TYPE_SPECIAL:
2359 case YAFFS_OBJECT_TYPE_UNKNOWN:
2364 if (yaffs_UpdateObjectHeader(in, name, 0, 0, 0) < 0) {
2365 /* Could not create the object header, fail the creation */
2366 yaffs_DeleteObject(in);
2370 yaffs_UpdateParent(parent);
2376 yaffs_Object *yaffs_MknodFile(yaffs_Object *parent, const YCHAR *name,
2377 __u32 mode, __u32 uid, __u32 gid)
2379 return yaffs_MknodObject(YAFFS_OBJECT_TYPE_FILE, parent, name, mode,
2380 uid, gid, NULL, NULL, 0);
2383 yaffs_Object *yaffs_MknodDirectory(yaffs_Object *parent, const YCHAR *name,
2384 __u32 mode, __u32 uid, __u32 gid)
2386 return yaffs_MknodObject(YAFFS_OBJECT_TYPE_DIRECTORY, parent, name,
2387 mode, uid, gid, NULL, NULL, 0);
2390 yaffs_Object *yaffs_MknodSpecial(yaffs_Object *parent, const YCHAR *name,
2391 __u32 mode, __u32 uid, __u32 gid, __u32 rdev)
2393 return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SPECIAL, parent, name, mode,
2394 uid, gid, NULL, NULL, rdev);
2397 yaffs_Object *yaffs_MknodSymLink(yaffs_Object *parent, const YCHAR *name,
2398 __u32 mode, __u32 uid, __u32 gid,
2401 return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SYMLINK, parent, name, mode,
2402 uid, gid, NULL, alias, 0);
2405 /* yaffs_Link returns the object id of the equivalent object.*/
2406 yaffs_Object *yaffs_Link(yaffs_Object *parent, const YCHAR *name,
2407 yaffs_Object *equivalentObject)
2409 /* Get the real object in case we were fed a hard link as an equivalent object */
2410 equivalentObject = yaffs_GetEquivalentObject(equivalentObject);
2412 if (yaffs_MknodObject
2413 (YAFFS_OBJECT_TYPE_HARDLINK, parent, name, 0, 0, 0,
2414 equivalentObject, NULL, 0)) {
2415 return equivalentObject;
2422 static int yaffs_ChangeObjectName(yaffs_Object *obj, yaffs_Object *newDir,
2423 const YCHAR *newName, int force, int shadows)
2428 yaffs_Object *existingTarget;
2431 newDir = obj->parent; /* use the old directory */
2433 if (newDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
2434 T(YAFFS_TRACE_ALWAYS,
2436 ("tragedy: yaffs_ChangeObjectName: newDir is not a directory"
2441 /* TODO: Do we need this different handling for YAFFS2 and YAFFS1?? */
2442 if (obj->myDev->isYaffs2)
2443 unlinkOp = (newDir == obj->myDev->unlinkedDir);
2445 unlinkOp = (newDir == obj->myDev->unlinkedDir
2446 && obj->variantType == YAFFS_OBJECT_TYPE_FILE);
2448 deleteOp = (newDir == obj->myDev->deletedDir);
2450 existingTarget = yaffs_FindObjectByName(newDir, newName);
2452 /* If the object is a file going into the unlinked directory,
2453 * then it is OK to just stuff it in since duplicate names are allowed.
2454 * else only proceed if the new name does not exist and if we're putting
2455 * it into a directory.
2462 newDir->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) {
2463 yaffs_SetObjectName(obj, newName);
2466 yaffs_AddObjectToDirectory(newDir, obj);
2471 /* If it is a deletion then we mark it as a shrink for gc purposes. */
2472 if (yaffs_UpdateObjectHeader(obj, newName, 0, deleteOp, shadows) >= 0)
2479 int yaffs_RenameObject(yaffs_Object *oldDir, const YCHAR *oldName,
2480 yaffs_Object *newDir, const YCHAR *newName)
2482 yaffs_Object *obj = NULL;
2483 yaffs_Object *existingTarget = NULL;
2489 if (!oldDir || oldDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
2491 if (!newDir || newDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
2494 dev = oldDir->myDev;
2496 #ifdef CONFIG_YAFFS_CASE_INSENSITIVE
2497 /* Special case for case insemsitive systems (eg. WinCE).
2498 * While look-up is case insensitive, the name isn't.
2499 * Therefore we might want to change x.txt to X.txt
2501 if (oldDir == newDir && yaffs_strcmp(oldName, newName) == 0)
2505 if(yaffs_strnlen(newName,YAFFS_MAX_NAME_LENGTH+1) > YAFFS_MAX_NAME_LENGTH)
2509 obj = yaffs_FindObjectByName(oldDir, oldName);
2511 if (obj && obj->renameAllowed) {
2513 /* Now do the handling for an existing target, if there is one */
2515 existingTarget = yaffs_FindObjectByName(newDir, newName);
2516 if (existingTarget &&
2517 existingTarget->variantType == YAFFS_OBJECT_TYPE_DIRECTORY &&
2518 !ylist_empty(&existingTarget->variant.directoryVariant.children)) {
2519 /* There is a target that is a non-empty directory, so we fail */
2520 return YAFFS_FAIL; /* EEXIST or ENOTEMPTY */
2521 } else if (existingTarget && existingTarget != obj) {
2522 /* Nuke the target first, using shadowing,
2523 * but only if it isn't the same object.
2525 * Note we must disable gc otherwise it can mess up the shadowing.
2529 yaffs_ChangeObjectName(obj, newDir, newName, force,
2530 existingTarget->objectId);
2531 existingTarget->isShadowed = 1;
2532 yaffs_UnlinkObject(existingTarget);
2536 result = yaffs_ChangeObjectName(obj, newDir, newName, 1, 0);
2538 yaffs_UpdateParent(oldDir);
2539 if(newDir != oldDir)
2540 yaffs_UpdateParent(newDir);
2547 /*------------------------- Block Management and Page Allocation ----------------*/
2549 static int yaffs_InitialiseBlocks(yaffs_Device *dev)
2551 int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1;
2553 dev->blockInfo = NULL;
2554 dev->chunkBits = NULL;
2556 dev->allocationBlock = -1; /* force it to get a new one */
2558 /* If the first allocation strategy fails, thry the alternate one */
2559 dev->blockInfo = YMALLOC(nBlocks * sizeof(yaffs_BlockInfo));
2560 if (!dev->blockInfo) {
2561 dev->blockInfo = YMALLOC_ALT(nBlocks * sizeof(yaffs_BlockInfo));
2562 dev->blockInfoAlt = 1;
2564 dev->blockInfoAlt = 0;
2566 if (dev->blockInfo) {
2567 /* Set up dynamic blockinfo stuff. */
2568 dev->chunkBitmapStride = (dev->nChunksPerBlock + 7) / 8; /* round up bytes */
2569 dev->chunkBits = YMALLOC(dev->chunkBitmapStride * nBlocks);
2570 if (!dev->chunkBits) {
2571 dev->chunkBits = YMALLOC_ALT(dev->chunkBitmapStride * nBlocks);
2572 dev->chunkBitsAlt = 1;
2574 dev->chunkBitsAlt = 0;
2577 if (dev->blockInfo && dev->chunkBits) {
2578 memset(dev->blockInfo, 0, nBlocks * sizeof(yaffs_BlockInfo));
2579 memset(dev->chunkBits, 0, dev->chunkBitmapStride * nBlocks);
2586 static void yaffs_DeinitialiseBlocks(yaffs_Device *dev)
2588 if (dev->blockInfoAlt && dev->blockInfo)
2589 YFREE_ALT(dev->blockInfo);
2590 else if (dev->blockInfo)
2591 YFREE(dev->blockInfo);
2593 dev->blockInfoAlt = 0;
2595 dev->blockInfo = NULL;
2597 if (dev->chunkBitsAlt && dev->chunkBits)
2598 YFREE_ALT(dev->chunkBits);
2599 else if (dev->chunkBits)
2600 YFREE(dev->chunkBits);
2601 dev->chunkBitsAlt = 0;
2602 dev->chunkBits = NULL;
2605 static int yaffs_BlockNotDisqualifiedFromGC(yaffs_Device *dev,
2606 yaffs_BlockInfo *bi)
2613 return 1; /* disqualification only applies to yaffs2. */
2615 if (!bi->hasShrinkHeader)
2616 return 1; /* can gc */
2618 /* Find the oldest dirty sequence number if we don't know it and save it
2619 * so we don't have to keep recomputing it.
2621 if (!dev->oldestDirtySequence) {
2622 seq = dev->sequenceNumber;
2624 for (i = dev->internalStartBlock; i <= dev->internalEndBlock;
2626 b = yaffs_GetBlockInfo(dev, i);
2627 if (b->blockState == YAFFS_BLOCK_STATE_FULL &&
2628 (b->pagesInUse - b->softDeletions) <
2629 dev->nChunksPerBlock && b->sequenceNumber < seq) {
2630 seq = b->sequenceNumber;
2633 dev->oldestDirtySequence = seq;
2636 /* Can't do gc of this block if there are any blocks older than this one that have
2639 return (bi->sequenceNumber <= dev->oldestDirtySequence);
2642 /* FindDiretiestBlock is used to select the dirtiest block (or close enough)
2643 * for garbage collection.
2646 static int yaffs_FindBlockForGarbageCollection(yaffs_Device *dev,
2649 int b = dev->currentDirtyChecker;
2655 int prioritised = 0;
2656 yaffs_BlockInfo *bi;
2657 int pendingPrioritisedExist = 0;
2659 /* First let's see if we need to grab a prioritised block */
2660 if (dev->hasPendingPrioritisedGCs) {
2661 for (i = dev->internalStartBlock; i < dev->internalEndBlock && !prioritised; i++) {
2663 bi = yaffs_GetBlockInfo(dev, i);
2664 /* yaffs_VerifyBlock(dev,bi,i); */
2666 if (bi->gcPrioritise) {
2667 pendingPrioritisedExist = 1;
2668 if (bi->blockState == YAFFS_BLOCK_STATE_FULL &&
2669 yaffs_BlockNotDisqualifiedFromGC(dev, bi)) {
2670 pagesInUse = (bi->pagesInUse - bi->softDeletions);
2673 aggressive = 1; /* Fool the non-aggressive skip logiv below */
2678 if (!pendingPrioritisedExist) /* None found, so we can clear this */
2679 dev->hasPendingPrioritisedGCs = 0;
2682 /* If we're doing aggressive GC then we are happy to take a less-dirty block, and
2684 * else (we're doing a leasurely gc), then we only bother to do this if the
2685 * block has only a few pages in use.
2688 dev->nonAggressiveSkip--;
2690 if (!aggressive && (dev->nonAggressiveSkip > 0))
2695 (aggressive) ? dev->nChunksPerBlock : YAFFS_PASSIVE_GC_CHUNKS + 1;
2699 dev->internalEndBlock - dev->internalStartBlock + 1;
2702 dev->internalEndBlock - dev->internalStartBlock + 1;
2703 iterations = iterations / 16;
2704 if (iterations > 200)
2708 for (i = 0; i <= iterations && pagesInUse > 0 && !prioritised; i++) {
2710 if (b < dev->internalStartBlock || b > dev->internalEndBlock)
2711 b = dev->internalStartBlock;
2713 if (b < dev->internalStartBlock || b > dev->internalEndBlock) {
2714 T(YAFFS_TRACE_ERROR,
2715 (TSTR("**>> Block %d is not valid" TENDSTR), b));
2719 bi = yaffs_GetBlockInfo(dev, b);
2721 if (bi->blockState == YAFFS_BLOCK_STATE_FULL &&
2722 (bi->pagesInUse - bi->softDeletions) < pagesInUse &&
2723 yaffs_BlockNotDisqualifiedFromGC(dev, bi)) {
2725 pagesInUse = (bi->pagesInUse - bi->softDeletions);
2729 dev->currentDirtyChecker = b;
2733 (TSTR("GC Selected block %d with %d free, prioritised:%d" TENDSTR), dirtiest,
2734 dev->nChunksPerBlock - pagesInUse, prioritised));
2737 dev->oldestDirtySequence = 0;
2740 dev->nonAggressiveSkip = 4;
2745 static void yaffs_BlockBecameDirty(yaffs_Device *dev, int blockNo)
2747 yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockNo);
2751 /* If the block is still healthy erase it and mark as clean.
2752 * If the block has had a data failure, then retire it.
2755 T(YAFFS_TRACE_GC | YAFFS_TRACE_ERASE,
2756 (TSTR("yaffs_BlockBecameDirty block %d state %d %s"TENDSTR),
2757 blockNo, bi->blockState, (bi->needsRetiring) ? "needs retiring" : ""));
2759 bi->blockState = YAFFS_BLOCK_STATE_DIRTY;
2761 if (!bi->needsRetiring) {
2762 yaffs_InvalidateCheckpoint(dev);
2763 erasedOk = yaffs_EraseBlockInNAND(dev, blockNo);
2765 dev->nErasureFailures++;
2766 T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
2767 (TSTR("**>> Erasure failed %d" TENDSTR), blockNo));
2772 ((yaffs_traceMask & YAFFS_TRACE_ERASE) || !yaffs_SkipVerification(dev))) {
2774 for (i = 0; i < dev->nChunksPerBlock; i++) {
2775 if (!yaffs_CheckChunkErased
2776 (dev, blockNo * dev->nChunksPerBlock + i)) {
2777 T(YAFFS_TRACE_ERROR,
2779 (">>Block %d erasure supposedly OK, but chunk %d not erased"
2780 TENDSTR), blockNo, i));
2786 /* Clean it up... */
2787 bi->blockState = YAFFS_BLOCK_STATE_EMPTY;
2788 dev->nErasedBlocks++;
2790 bi->softDeletions = 0;
2791 bi->hasShrinkHeader = 0;
2792 bi->skipErasedCheck = 1; /* This is clean, so no need to check */
2793 bi->gcPrioritise = 0;
2794 yaffs_ClearChunkBits(dev, blockNo);
2796 T(YAFFS_TRACE_ERASE,
2797 (TSTR("Erased block %d" TENDSTR), blockNo));
2799 dev->nFreeChunks -= dev->nChunksPerBlock; /* We lost a block of free space */
2801 yaffs_RetireBlock(dev, blockNo);
2802 T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
2803 (TSTR("**>> Block %d retired" TENDSTR), blockNo));
2807 static int yaffs_FindBlockForAllocation(yaffs_Device *dev)
2811 yaffs_BlockInfo *bi;
2813 if (dev->nErasedBlocks < 1) {
2814 /* Hoosterman we've got a problem.
2815 * Can't get space to gc
2817 T(YAFFS_TRACE_ERROR,
2818 (TSTR("yaffs tragedy: no more erased blocks" TENDSTR)));
2823 /* Find an empty block. */
2825 for (i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) {
2826 dev->allocationBlockFinder++;
2827 if (dev->allocationBlockFinder < dev->internalStartBlock
2828 || dev->allocationBlockFinder > dev->internalEndBlock) {
2829 dev->allocationBlockFinder = dev->internalStartBlock;
2832 bi = yaffs_GetBlockInfo(dev, dev->allocationBlockFinder);
2834 if (bi->blockState == YAFFS_BLOCK_STATE_EMPTY) {
2835 bi->blockState = YAFFS_BLOCK_STATE_ALLOCATING;
2836 dev->sequenceNumber++;
2837 bi->sequenceNumber = dev->sequenceNumber;
2838 dev->nErasedBlocks--;
2839 T(YAFFS_TRACE_ALLOCATE,
2840 (TSTR("Allocated block %d, seq %d, %d left" TENDSTR),
2841 dev->allocationBlockFinder, dev->sequenceNumber,
2842 dev->nErasedBlocks));
2843 return dev->allocationBlockFinder;
2847 T(YAFFS_TRACE_ALWAYS,
2849 ("yaffs tragedy: no more erased blocks, but there should have been %d"
2850 TENDSTR), dev->nErasedBlocks));
2857 static int yaffs_CalcCheckpointBlocksRequired(yaffs_Device *dev)
2859 if (!dev->nCheckpointBlocksRequired &&
2861 /* Not a valid value so recalculate */
2864 int devBlocks = (dev->endBlock - dev->startBlock + 1);
2867 tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
2869 if (tnodeSize < sizeof(yaffs_Tnode))
2870 tnodeSize = sizeof(yaffs_Tnode);
2872 nBytes += sizeof(yaffs_CheckpointValidity);
2873 nBytes += sizeof(yaffs_CheckpointDevice);
2874 nBytes += devBlocks * sizeof(yaffs_BlockInfo);
2875 nBytes += devBlocks * dev->chunkBitmapStride;
2876 nBytes += (sizeof(yaffs_CheckpointObject) + sizeof(__u32)) * (dev->nObjectsCreated - dev->nFreeObjects);
2877 nBytes += (tnodeSize + sizeof(__u32)) * (dev->nTnodesCreated - dev->nFreeTnodes);
2878 nBytes += sizeof(yaffs_CheckpointValidity);
2879 nBytes += sizeof(__u32); /* checksum*/
2881 /* Round up and add 2 blocks to allow for some bad blocks, so add 3 */
2883 nBlocks = (nBytes/(dev->nDataBytesPerChunk * dev->nChunksPerBlock)) + 3;
2885 dev->nCheckpointBlocksRequired = nBlocks;
2888 return dev->nCheckpointBlocksRequired;
2892 * Check if there's space to allocate...
2893 * Thinks.... do we need top make this ths same as yaffs_GetFreeChunks()?
2895 static int yaffs_CheckSpaceForAllocation(yaffs_Device *dev)
2898 int reservedBlocks = dev->nReservedBlocks;
2899 int checkpointBlocks;
2901 if (dev->isYaffs2) {
2902 checkpointBlocks = yaffs_CalcCheckpointBlocksRequired(dev) -
2903 dev->blocksInCheckpoint;
2904 if (checkpointBlocks < 0)
2905 checkpointBlocks = 0;
2907 checkpointBlocks = 0;
2910 reservedChunks = ((reservedBlocks + checkpointBlocks) * dev->nChunksPerBlock);
2912 return (dev->nFreeChunks > reservedChunks);
2915 static int yaffs_AllocateChunk(yaffs_Device *dev, int useReserve,
2916 yaffs_BlockInfo **blockUsedPtr)
2919 yaffs_BlockInfo *bi;
2921 if (dev->allocationBlock < 0) {
2922 /* Get next block to allocate off */
2923 dev->allocationBlock = yaffs_FindBlockForAllocation(dev);
2924 dev->allocationPage = 0;
2927 if (!useReserve && !yaffs_CheckSpaceForAllocation(dev)) {
2928 /* Not enough space to allocate unless we're allowed to use the reserve. */
2932 if (dev->nErasedBlocks < dev->nReservedBlocks
2933 && dev->allocationPage == 0) {
2934 T(YAFFS_TRACE_ALLOCATE, (TSTR("Allocating reserve" TENDSTR)));
2937 /* Next page please.... */
2938 if (dev->allocationBlock >= 0) {
2939 bi = yaffs_GetBlockInfo(dev, dev->allocationBlock);
2941 retVal = (dev->allocationBlock * dev->nChunksPerBlock) +
2942 dev->allocationPage;
2944 yaffs_SetChunkBit(dev, dev->allocationBlock,
2945 dev->allocationPage);
2947 dev->allocationPage++;
2951 /* If the block is full set the state to full */
2952 if (dev->allocationPage >= dev->nChunksPerBlock) {
2953 bi->blockState = YAFFS_BLOCK_STATE_FULL;
2954 dev->allocationBlock = -1;
2963 T(YAFFS_TRACE_ERROR,
2964 (TSTR("!!!!!!!!! Allocator out !!!!!!!!!!!!!!!!!" TENDSTR)));
2969 static int yaffs_GetErasedChunks(yaffs_Device *dev)
2973 n = dev->nErasedBlocks * dev->nChunksPerBlock;
2975 if (dev->allocationBlock > 0)
2976 n += (dev->nChunksPerBlock - dev->allocationPage);
2982 static int yaffs_GarbageCollectBlock(yaffs_Device *dev, int block,
2988 int retVal = YAFFS_OK;
2991 int isCheckpointBlock;
2995 int chunksBefore = yaffs_GetErasedChunks(dev);
2998 yaffs_ExtendedTags tags;
3000 yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, block);
3002 yaffs_Object *object;
3004 isCheckpointBlock = (bi->blockState == YAFFS_BLOCK_STATE_CHECKPOINT);
3007 T(YAFFS_TRACE_TRACING,
3008 (TSTR("Collecting block %d, in use %d, shrink %d, wholeBlock %d" TENDSTR),
3011 bi->hasShrinkHeader,
3014 /*yaffs_VerifyFreeChunks(dev); */
3016 if(bi->blockState == YAFFS_BLOCK_STATE_FULL)
3017 bi->blockState = YAFFS_BLOCK_STATE_COLLECTING;
3019 bi->hasShrinkHeader = 0; /* clear the flag so that the block can erase */
3021 /* Take off the number of soft deleted entries because
3022 * they're going to get really deleted during GC.
3024 if(dev->gcChunk == 0) /* first time through for this block */
3025 dev->nFreeChunks -= bi->softDeletions;
3029 if (isCheckpointBlock ||
3030 !yaffs_StillSomeChunkBits(dev, block)) {
3031 T(YAFFS_TRACE_TRACING,
3033 ("Collecting block %d that has no chunks in use" TENDSTR),
3035 yaffs_BlockBecameDirty(dev, block);
3038 __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__);
3040 yaffs_VerifyBlock(dev, bi, block);
3042 maxCopies = (wholeBlock) ? dev->nChunksPerBlock : 10;
3043 oldChunk = block * dev->nChunksPerBlock + dev->gcChunk;
3045 for (/* init already done */;
3046 retVal == YAFFS_OK &&
3047 dev->gcChunk < dev->nChunksPerBlock &&
3048 (bi->blockState == YAFFS_BLOCK_STATE_COLLECTING) &&
3050 dev->gcChunk++, oldChunk++) {
3051 if (yaffs_CheckChunkBit(dev, block, dev->gcChunk)) {
3053 /* This page is in use and might need to be copied off */
3059 yaffs_InitialiseTags(&tags);
3061 yaffs_ReadChunkWithTagsFromNAND(dev, oldChunk,
3065 yaffs_FindObjectByNumber(dev,
3068 T(YAFFS_TRACE_GC_DETAIL,
3070 ("Collecting chunk in block %d, %d %d %d " TENDSTR),
3071 dev->gcChunk, tags.objectId, tags.chunkId,
3074 if (object && !yaffs_SkipVerification(dev)) {
3075 if (tags.chunkId == 0)
3076 matchingChunk = object->hdrChunk;
3077 else if (object->softDeleted)
3078 matchingChunk = oldChunk; /* Defeat the test */
3080 matchingChunk = yaffs_FindChunkInFile(object, tags.chunkId, NULL);
3082 if (oldChunk != matchingChunk)
3083 T(YAFFS_TRACE_ERROR,
3084 (TSTR("gc: page in gc mismatch: %d %d %d %d"TENDSTR),
3085 oldChunk, matchingChunk, tags.objectId, tags.chunkId));
3090 T(YAFFS_TRACE_ERROR,
3092 ("page %d in gc has no object: %d %d %d "
3094 tags.objectId, tags.chunkId, tags.byteCount));
3099 object->softDeleted &&
3100 tags.chunkId != 0) {
3101 /* Data chunk in a soft deleted file, throw it away
3102 * It's a soft deleted data chunk,
3103 * No need to copy this, just forget about it and
3104 * fix up the object.
3107 object->nDataChunks--;
3109 if (object->nDataChunks <= 0) {
3110 /* remeber to clean up the object */
3111 dev->gcCleanupList[cleanups] =
3117 /* Todo object && object->deleted && object->nDataChunks == 0 */
3118 /* Deleted object header with no data chunks.
3119 * Can be discarded and the file deleted.
3121 object->hdrChunk = 0;
3122 yaffs_FreeTnode(object->myDev,
3125 object->variant.fileVariant.top = NULL;
3126 yaffs_DoGenericObjectDeletion(object);
3128 } else if (object) {
3129 /* It's either a data chunk in a live file or
3130 * an ObjectHeader, so we're interested in it.
3131 * NB Need to keep the ObjectHeaders of deleted files
3132 * until the whole file has been deleted off
3134 tags.serialNumber++;
3138 if (tags.chunkId == 0) {
3139 /* It is an object Id,
3140 * We need to nuke the shrinkheader flags first
3141 * Also need to clean up shadowing.
3142 * We no longer want the shrinkHeader flag since its work is done
3143 * and if it is left in place it will mess up scanning.
3146 yaffs_ObjectHeader *oh;
3147 oh = (yaffs_ObjectHeader *)buffer;
3149 tags.extraIsShrinkHeader = 0;
3150 oh->shadowsObject = 0;
3151 oh->inbandShadowsObject = 0;
3152 tags.extraShadows = 0;
3154 yaffs_VerifyObjectHeader(object, oh, &tags, 1);
3158 yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &tags, 1);
3161 retVal = YAFFS_FAIL;
3164 /* Ok, now fix up the Tnodes etc. */
3166 if (tags.chunkId == 0) {
3168 object->hdrChunk = newChunk;
3169 object->serial = tags.serialNumber;
3171 /* It's a data chunk */
3172 yaffs_PutChunkIntoFile
3180 if (retVal == YAFFS_OK)
3181 yaffs_DeleteChunk(dev, oldChunk, markNAND, __LINE__);
3186 yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
3189 /* Do any required cleanups */
3190 for (i = 0; i < cleanups; i++) {
3191 /* Time to delete the file too */
3193 yaffs_FindObjectByNumber(dev,
3194 dev->gcCleanupList[i]);
3196 yaffs_FreeTnode(dev,
3197 object->variant.fileVariant.
3199 object->variant.fileVariant.top = NULL;
3202 ("yaffs: About to finally delete object %d"
3203 TENDSTR), object->objectId));
3204 yaffs_DoGenericObjectDeletion(object);
3205 object->myDev->nDeletedFiles--;
3212 yaffs_VerifyCollectedBlock(dev, bi, block);
3214 chunksAfter = yaffs_GetErasedChunks(dev);
3215 if (chunksBefore >= chunksAfter) {
3218 ("gc did not increase free chunks before %d after %d"
3219 TENDSTR), chunksBefore, chunksAfter));
3222 /* If the gc completed then clear the current gcBlock so that we find another. */
3223 if (bi->blockState != YAFFS_BLOCK_STATE_COLLECTING) {
3233 /* New garbage collector
3234 * If we're very low on erased blocks then we do aggressive garbage collection
3235 * otherwise we do "leasurely" garbage collection.
3236 * Aggressive gc looks further (whole array) and will accept less dirty blocks.
3237 * Passive gc only inspects smaller areas and will only accept more dirty blocks.
3239 * The idea is to help clear out space in a more spread-out manner.
3240 * Dunno if it really does anything useful.
3242 static int yaffs_CheckGarbageCollection(yaffs_Device *dev)
3246 int gcOk = YAFFS_OK;
3249 int checkpointBlockAdjust;
3251 if (dev->isDoingGC) {
3252 /* Bail out so we don't get recursive gc */
3256 /* This loop should pass the first time.
3257 * We'll only see looping here if the erase of the collected block fails.
3263 checkpointBlockAdjust = yaffs_CalcCheckpointBlocksRequired(dev) - dev->blocksInCheckpoint;
3264 if (checkpointBlockAdjust < 0)
3265 checkpointBlockAdjust = 0;
3267 if (dev->nErasedBlocks < (dev->nReservedBlocks + checkpointBlockAdjust + 2)) {
3268 /* We need a block soon...*/
3271 /* We're in no hurry */
3275 if (dev->gcBlock <= 0) {
3276 dev->gcBlock = yaffs_FindBlockForGarbageCollection(dev, aggressive);
3280 block = dev->gcBlock;
3283 dev->garbageCollections++;
3285 dev->passiveGarbageCollections++;
3289 ("yaffs: GC erasedBlocks %d aggressive %d" TENDSTR),
3290 dev->nErasedBlocks, aggressive));
3292 gcOk = yaffs_GarbageCollectBlock(dev, block, aggressive);
3295 if (dev->nErasedBlocks < (dev->nReservedBlocks) && block > 0) {
3298 ("yaffs: GC !!!no reclaim!!! erasedBlocks %d after try %d block %d"
3299 TENDSTR), dev->nErasedBlocks, maxTries, block));
3301 } while ((dev->nErasedBlocks < dev->nReservedBlocks) &&
3305 return aggressive ? gcOk : YAFFS_OK;
3308 /*------------------------- TAGS --------------------------------*/
3310 static int yaffs_TagsMatch(const yaffs_ExtendedTags *tags, int objectId,
3313 return (tags->chunkId == chunkInObject &&
3314 tags->objectId == objectId && !tags->chunkDeleted) ? 1 : 0;
3319 /*-------------------- Data file manipulation -----------------*/
3321 static int yaffs_FindChunkInFile(yaffs_Object *in, int chunkInInode,
3322 yaffs_ExtendedTags *tags)
3324 /*Get the Tnode, then get the level 0 offset chunk offset */
3327 yaffs_ExtendedTags localTags;
3330 yaffs_Device *dev = in->myDev;
3333 /* Passed a NULL, so use our own tags space */
3337 tn = yaffs_FindLevel0Tnode(dev, &in->variant.fileVariant, chunkInInode);
3340 theChunk = yaffs_GetChunkGroupBase(dev, tn, chunkInInode);
3343 yaffs_FindChunkInGroup(dev, theChunk, tags, in->objectId,
3349 static int yaffs_FindAndDeleteChunkInFile(yaffs_Object *in, int chunkInInode,
3350 yaffs_ExtendedTags *tags)
3352 /* Get the Tnode, then get the level 0 offset chunk offset */
3355 yaffs_ExtendedTags localTags;
3357 yaffs_Device *dev = in->myDev;
3361 /* Passed a NULL, so use our own tags space */
3365 tn = yaffs_FindLevel0Tnode(dev, &in->variant.fileVariant, chunkInInode);
3369 theChunk = yaffs_GetChunkGroupBase(dev, tn, chunkInInode);
3372 yaffs_FindChunkInGroup(dev, theChunk, tags, in->objectId,
3375 /* Delete the entry in the filestructure (if found) */
3377 yaffs_LoadLevel0Tnode(dev, tn, chunkInInode, 0);
3383 #ifdef YAFFS_PARANOID
3385 static int yaffs_CheckFileSanity(yaffs_Object *in)
3393 yaffs_Tags localTags;
3394 yaffs_Tags *tags = &localTags;
3398 if (in->variantType != YAFFS_OBJECT_TYPE_FILE)
3401 objId = in->objectId;
3402 fSize = in->variant.fileVariant.fileSize;
3404 (fSize + in->myDev->nDataBytesPerChunk - 1) / in->myDev->nDataBytesPerChunk;
3406 for (chunk = 1; chunk <= nChunks; chunk++) {
3407 tn = yaffs_FindLevel0Tnode(in->myDev, &in->variant.fileVariant,
3412 theChunk = yaffs_GetChunkGroupBase(dev, tn, chunk);
3414 if (yaffs_CheckChunkBits
3415 (dev, theChunk / dev->nChunksPerBlock,
3416 theChunk % dev->nChunksPerBlock)) {
3418 yaffs_ReadChunkTagsFromNAND(in->myDev, theChunk,
3422 (tags, in->objectId, chunk, chunkDeleted)) {
3432 /* T(("No level 0 found for %d\n", chunk)); */
3436 return failed ? YAFFS_FAIL : YAFFS_OK;
3441 static int yaffs_PutChunkIntoFile(yaffs_Object *in, int chunkInInode,
3442 int chunkInNAND, int inScan)
3444 /* NB inScan is zero unless scanning.
3445 * For forward scanning, inScan is > 0;
3446 * for backward scanning inScan is < 0
3448 * chunkInNAND = 0 is a dummy insert to make sure the tnodes are there.
3452 yaffs_Device *dev = in->myDev;
3454 yaffs_ExtendedTags existingTags;
3455 yaffs_ExtendedTags newTags;
3456 unsigned existingSerial, newSerial;
3458 if (in->variantType != YAFFS_OBJECT_TYPE_FILE) {
3459 /* Just ignore an attempt at putting a chunk into a non-file during scanning
3460 * If it is not during Scanning then something went wrong!
3463 T(YAFFS_TRACE_ERROR,
3465 ("yaffs tragedy:attempt to put data chunk into a non-file"
3470 yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__);
3474 tn = yaffs_AddOrFindLevel0Tnode(dev,
3475 &in->variant.fileVariant,
3482 /* Dummy insert, bail now */
3486 existingChunk = yaffs_GetChunkGroupBase(dev, tn, chunkInInode);
3489 /* If we're scanning then we need to test for duplicates
3490 * NB This does not need to be efficient since it should only ever
3491 * happen when the power fails during a write, then only one
3492 * chunk should ever be affected.
3494 * Correction for YAFFS2: This could happen quite a lot and we need to think about efficiency! TODO
3495 * Update: For backward scanning we don't need to re-read tags so this is quite cheap.
3498 if (existingChunk > 0) {
3499 /* NB Right now existing chunk will not be real chunkId if the device >= 32MB
3500 * thus we have to do a FindChunkInFile to get the real chunk id.
3502 * We have a duplicate now we need to decide which one to use:
3504 * Backwards scanning YAFFS2: The old one is what we use, dump the new one.
3505 * Forward scanning YAFFS2: The new one is what we use, dump the old one.
3506 * YAFFS1: Get both sets of tags and compare serial numbers.
3510 /* Only do this for forward scanning */
3511 yaffs_ReadChunkWithTagsFromNAND(dev,
3515 /* Do a proper find */
3517 yaffs_FindChunkInFile(in, chunkInInode,
3521 if (existingChunk <= 0) {
3522 /*Hoosterman - how did this happen? */
3524 T(YAFFS_TRACE_ERROR,
3526 ("yaffs tragedy: existing chunk < 0 in scan"
3531 /* NB The deleted flags should be false, otherwise the chunks will
3532 * not be loaded during a scan
3536 newSerial = newTags.serialNumber;
3537 existingSerial = existingTags.serialNumber;
3541 (in->myDev->isYaffs2 ||
3542 existingChunk <= 0 ||
3543 ((existingSerial + 1) & 3) == newSerial)) {
3544 /* Forward scanning.
3546 * Delete the old one and drop through to update the tnode
3548 yaffs_DeleteChunk(dev, existingChunk, 1,
3551 /* Backward scanning or we want to use the existing one
3553 * Delete the new one and return early so that the tnode isn't changed
3555 yaffs_DeleteChunk(dev, chunkInNAND, 1,
3563 if (existingChunk == 0)
3566 yaffs_LoadLevel0Tnode(dev, tn, chunkInInode, chunkInNAND);
3571 static int yaffs_ReadChunkDataFromObject(yaffs_Object *in, int chunkInInode,
3574 int chunkInNAND = yaffs_FindChunkInFile(in, chunkInInode, NULL);
3576 if (chunkInNAND >= 0)
3577 return yaffs_ReadChunkWithTagsFromNAND(in->myDev, chunkInNAND,
3580 T(YAFFS_TRACE_NANDACCESS,
3581 (TSTR("Chunk %d not found zero instead" TENDSTR),
3583 /* get sane (zero) data if you read a hole */
3584 memset(buffer, 0, in->myDev->nDataBytesPerChunk);
3590 void yaffs_DeleteChunk(yaffs_Device *dev, int chunkId, int markNAND, int lyn)
3594 yaffs_ExtendedTags tags;
3595 yaffs_BlockInfo *bi;
3601 block = chunkId / dev->nChunksPerBlock;
3602 page = chunkId % dev->nChunksPerBlock;
3605 if (!yaffs_CheckChunkBit(dev, block, page))
3606 T(YAFFS_TRACE_VERIFY,
3607 (TSTR("Deleting invalid chunk %d"TENDSTR),
3610 bi = yaffs_GetBlockInfo(dev, block);
3612 T(YAFFS_TRACE_DELETION,
3613 (TSTR("line %d delete of chunk %d" TENDSTR), lyn, chunkId));
3616 bi->blockState != YAFFS_BLOCK_STATE_COLLECTING && !dev->isYaffs2) {
3618 yaffs_InitialiseTags(&tags);
3620 tags.chunkDeleted = 1;
3622 yaffs_WriteChunkWithTagsToNAND(dev, chunkId, NULL, &tags);
3623 yaffs_HandleUpdateChunk(dev, chunkId, &tags);
3625 dev->nUnmarkedDeletions++;
3628 /* Pull out of the management area.
3629 * If the whole block became dirty, this will kick off an erasure.
3631 if (bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING ||
3632 bi->blockState == YAFFS_BLOCK_STATE_FULL ||
3633 bi->blockState == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
3634 bi->blockState == YAFFS_BLOCK_STATE_COLLECTING) {
3637 yaffs_ClearChunkBit(dev, block, page);
3641 if (bi->pagesInUse == 0 &&
3642 !bi->hasShrinkHeader &&
3643 bi->blockState != YAFFS_BLOCK_STATE_ALLOCATING &&
3644 bi->blockState != YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
3645 yaffs_BlockBecameDirty(dev, block);
3652 static int yaffs_WriteChunkDataToObject(yaffs_Object *in, int chunkInInode,
3653 const __u8 *buffer, int nBytes,
3656 /* Find old chunk Need to do this to get serial number
3657 * Write new one and patch into tree.
3658 * Invalidate old tags.
3662 yaffs_ExtendedTags prevTags;
3665 yaffs_ExtendedTags newTags;
3667 yaffs_Device *dev = in->myDev;
3669 yaffs_CheckGarbageCollection(dev);
3671 /* Get the previous chunk at this location in the file if it exists */
3672 prevChunkId = yaffs_FindChunkInFile(in, chunkInInode, &prevTags);
3674 /* Set up new tags */
3675 yaffs_InitialiseTags(&newTags);
3677 newTags.chunkId = chunkInInode;
3678 newTags.objectId = in->objectId;
3679 newTags.serialNumber =
3680 (prevChunkId > 0) ? prevTags.serialNumber + 1 : 1;
3681 newTags.byteCount = nBytes;
3683 if (nBytes < 1 || nBytes > dev->totalBytesPerChunk) {
3684 T(YAFFS_TRACE_ERROR,
3685 (TSTR("Writing %d bytes to chunk!!!!!!!!!" TENDSTR), nBytes));
3690 * If there isn't already a chunk there then do a dummy
3691 * insert to make sue we have the desired tnode structure.
3693 if(prevChunkId < 1 &&
3694 yaffs_PutChunkIntoFile(in, chunkInInode, 0, 0) != YAFFS_OK)
3698 yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &newTags,
3701 if (newChunkId > 0) {
3702 yaffs_PutChunkIntoFile(in, chunkInInode, newChunkId, 0);
3704 if (prevChunkId > 0)
3705 yaffs_DeleteChunk(dev, prevChunkId, 1, __LINE__);
3707 yaffs_CheckFileSanity(in);
3713 /* UpdateObjectHeader updates the header on NAND for an object.
3714 * If name is not NULL, then that new name is used.
3716 int yaffs_UpdateObjectHeader(yaffs_Object *in, const YCHAR *name, int force,
3717 int isShrink, int shadows)
3720 yaffs_BlockInfo *bi;
3722 yaffs_Device *dev = in->myDev;
3729 yaffs_ExtendedTags newTags;
3730 yaffs_ExtendedTags oldTags;
3731 YCHAR *alias = NULL;
3733 __u8 *buffer = NULL;
3734 YCHAR oldName[YAFFS_MAX_NAME_LENGTH + 1];
3736 yaffs_ObjectHeader *oh = NULL;
3738 yaffs_strcpy(oldName, _Y("silly old name"));
3742 in == dev->rootDir || /* The rootDir should also be saved */
3745 yaffs_CheckGarbageCollection(dev);
3746 yaffs_CheckObjectDetailsLoaded(in);
3748 buffer = yaffs_GetTempBuffer(in->myDev, __LINE__);
3749 oh = (yaffs_ObjectHeader *) buffer;
3751 prevChunkId = in->hdrChunk;
3753 if (prevChunkId > 0) {
3754 result = yaffs_ReadChunkWithTagsFromNAND(dev, prevChunkId,
3757 yaffs_VerifyObjectHeader(in, oh, &oldTags, 0);
3759 memcpy(oldName, oh->name, sizeof(oh->name));
3762 memset(buffer, 0xFF, dev->nDataBytesPerChunk);
3764 oh->type = in->variantType;
3765 oh->yst_mode = in->yst_mode;
3766 oh->shadowsObject = oh->inbandShadowsObject = shadows;
3768 #ifdef CONFIG_YAFFS_WINCE
3769 oh->win_atime[0] = in->win_atime[0];
3770 oh->win_ctime[0] = in->win_ctime[0];
3771 oh->win_mtime[0] = in->win_mtime[0];
3772 oh->win_atime[1] = in->win_atime[1];
3773 oh->win_ctime[1] = in->win_ctime[1];
3774 oh->win_mtime[1] = in->win_mtime[1];
3776 oh->yst_uid = in->yst_uid;
3777 oh->yst_gid = in->yst_gid;
3778 oh->yst_atime = in->yst_atime;
3779 oh->yst_mtime = in->yst_mtime;
3780 oh->yst_ctime = in->yst_ctime;
3781 oh->yst_rdev = in->yst_rdev;
3784 oh->parentObjectId = in->parent->objectId;
3786 oh->parentObjectId = 0;
3788 if (name && *name) {
3789 memset(oh->name, 0, sizeof(oh->name));
3790 yaffs_strncpy(oh->name, name, YAFFS_MAX_NAME_LENGTH);
3791 } else if (prevChunkId > 0)
3792 memcpy(oh->name, oldName, sizeof(oh->name));
3794 memset(oh->name, 0, sizeof(oh->name));
3796 oh->isShrink = isShrink;
3798 switch (in->variantType) {
3799 case YAFFS_OBJECT_TYPE_UNKNOWN:
3800 /* Should not happen */
3802 case YAFFS_OBJECT_TYPE_FILE:
3804 (oh->parentObjectId == YAFFS_OBJECTID_DELETED
3805 || oh->parentObjectId ==
3806 YAFFS_OBJECTID_UNLINKED) ? 0 : in->variant.
3807 fileVariant.fileSize;
3809 case YAFFS_OBJECT_TYPE_HARDLINK:
3810 oh->equivalentObjectId =
3811 in->variant.hardLinkVariant.equivalentObjectId;
3813 case YAFFS_OBJECT_TYPE_SPECIAL:
3816 case YAFFS_OBJECT_TYPE_DIRECTORY:
3819 case YAFFS_OBJECT_TYPE_SYMLINK:
3820 alias = in->variant.symLinkVariant.alias;
3822 alias = _Y("no alias");
3823 yaffs_strncpy(oh->alias,
3825 YAFFS_MAX_ALIAS_LENGTH);
3826 oh->alias[YAFFS_MAX_ALIAS_LENGTH] = 0;
3831 yaffs_InitialiseTags(&newTags);
3833 newTags.chunkId = 0;
3834 newTags.objectId = in->objectId;
3835 newTags.serialNumber = in->serial;
3837 /* Add extra info for file header */
3839 newTags.extraHeaderInfoAvailable = 1;
3840 newTags.extraParentObjectId = oh->parentObjectId;
3841 newTags.extraFileLength = oh->fileSize;
3842 newTags.extraIsShrinkHeader = oh->isShrink;
3843 newTags.extraEquivalentObjectId = oh->equivalentObjectId;
3844 newTags.extraShadows = (oh->shadowsObject > 0) ? 1 : 0;
3845 newTags.extraObjectType = in->variantType;
3847 yaffs_VerifyObjectHeader(in, oh, &newTags, 1);
3849 /* Create new chunk in NAND */
3851 yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &newTags,
3852 (prevChunkId > 0) ? 1 : 0);
3854 if (newChunkId >= 0) {
3856 in->hdrChunk = newChunkId;
3858 if (prevChunkId > 0) {
3859 yaffs_DeleteChunk(dev, prevChunkId, 1,
3863 if (!yaffs_ObjectHasCachedWriteData(in))
3866 /* If this was a shrink, then mark the block that the chunk lives on */
3868 bi = yaffs_GetBlockInfo(in->myDev,
3869 newChunkId / in->myDev->nChunksPerBlock);
3870 bi->hasShrinkHeader = 1;
3875 retVal = newChunkId;
3880 yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
3885 /*------------------------ Short Operations Cache ----------------------------------------
3886 * In many situations where there is no high level buffering (eg WinCE) a lot of
3887 * reads might be short sequential reads, and a lot of writes may be short
3888 * sequential writes. eg. scanning/writing a jpeg file.
3889 * In these cases, a short read/write cache can provide a huge perfomance benefit
3890 * with dumb-as-a-rock code.
3891 * In Linux, the page cache provides read buffering aand the short op cache provides write
3894 * There are a limited number (~10) of cache chunks per device so that we don't
3895 * need a very intelligent search.
3898 static int yaffs_ObjectHasCachedWriteData(yaffs_Object *obj)
3900 yaffs_Device *dev = obj->myDev;
3902 yaffs_ChunkCache *cache;
3903 int nCaches = obj->myDev->nShortOpCaches;
3905 for (i = 0; i < nCaches; i++) {
3906 cache = &dev->srCache[i];
3907 if (cache->object == obj &&
3916 static void yaffs_FlushFilesChunkCache(yaffs_Object *obj)
3918 yaffs_Device *dev = obj->myDev;
3919 int lowest = -99; /* Stop compiler whining. */
3921 yaffs_ChunkCache *cache;
3922 int chunkWritten = 0;
3923 int nCaches = obj->myDev->nShortOpCaches;
3929 /* Find the dirty cache for this object with the lowest chunk id. */
3930 for (i = 0; i < nCaches; i++) {
3931 if (dev->srCache[i].object == obj &&
3932 dev->srCache[i].dirty) {
3934 || dev->srCache[i].chunkId <
3936 cache = &dev->srCache[i];
3937 lowest = cache->chunkId;
3942 if (cache && !cache->locked) {
3943 /* Write it out and free it up */
3946 yaffs_WriteChunkDataToObject(cache->object,
3952 cache->object = NULL;
3955 } while (cache && chunkWritten > 0);
3958 /* Hoosterman, disk full while writing cache out. */
3959 T(YAFFS_TRACE_ERROR,
3960 (TSTR("yaffs tragedy: no space during cache write" TENDSTR)));
3967 /*yaffs_FlushEntireDeviceCache(dev)
3972 void yaffs_FlushEntireDeviceCache(yaffs_Device *dev)
3975 int nCaches = dev->nShortOpCaches;
3978 /* Find a dirty object in the cache and flush it...
3979 * until there are no further dirty objects.
3983 for (i = 0; i < nCaches && !obj; i++) {
3984 if (dev->srCache[i].object &&
3985 dev->srCache[i].dirty)
3986 obj = dev->srCache[i].object;
3990 yaffs_FlushFilesChunkCache(obj);
3997 /* Grab us a cache chunk for use.
3998 * First look for an empty one.
3999 * Then look for the least recently used non-dirty one.
4000 * Then look for the least recently used dirty one...., flush and look again.
4002 static yaffs_ChunkCache *yaffs_GrabChunkCacheWorker(yaffs_Device *dev)
4006 if (dev->nShortOpCaches > 0) {
4007 for (i = 0; i < dev->nShortOpCaches; i++) {
4008 if (!dev->srCache[i].object)
4009 return &dev->srCache[i];
4016 static yaffs_ChunkCache *yaffs_GrabChunkCache(yaffs_Device *dev)
4018 yaffs_ChunkCache *cache;
4019 yaffs_Object *theObj;
4024 if (dev->nShortOpCaches > 0) {
4025 /* Try find a non-dirty one... */
4027 cache = yaffs_GrabChunkCacheWorker(dev);
4030 /* They were all dirty, find the last recently used object and flush
4031 * its cache, then find again.
4032 * NB what's here is not very accurate, we actually flush the object
4033 * the last recently used page.
4036 /* With locking we can't assume we can use entry zero */
4043 for (i = 0; i < dev->nShortOpCaches; i++) {
4044 if (dev->srCache[i].object &&
4045 !dev->srCache[i].locked &&
4046 (dev->srCache[i].lastUse < usage || !cache)) {
4047 usage = dev->srCache[i].lastUse;
4048 theObj = dev->srCache[i].object;
4049 cache = &dev->srCache[i];
4054 if (!cache || cache->dirty) {
4055 /* Flush and try again */
4056 yaffs_FlushFilesChunkCache(theObj);
4057 cache = yaffs_GrabChunkCacheWorker(dev);
4067 /* Find a cached chunk */
4068 static yaffs_ChunkCache *yaffs_FindChunkCache(const yaffs_Object *obj,
4071 yaffs_Device *dev = obj->myDev;
4073 if (dev->nShortOpCaches > 0) {
4074 for (i = 0; i < dev->nShortOpCaches; i++) {
4075 if (dev->srCache[i].object == obj &&
4076 dev->srCache[i].chunkId == chunkId) {
4079 return &dev->srCache[i];
4086 /* Mark the chunk for the least recently used algorithym */
4087 static void yaffs_UseChunkCache(yaffs_Device *dev, yaffs_ChunkCache *cache,
4091 if (dev->nShortOpCaches > 0) {
4092 if (dev->srLastUse < 0 || dev->srLastUse > 100000000) {
4093 /* Reset the cache usages */
4095 for (i = 1; i < dev->nShortOpCaches; i++)
4096 dev->srCache[i].lastUse = 0;
4103 cache->lastUse = dev->srLastUse;
4110 /* Invalidate a single cache page.
4111 * Do this when a whole page gets written,
4112 * ie the short cache for this page is no longer valid.
4114 static void yaffs_InvalidateChunkCache(yaffs_Object *object, int chunkId)
4116 if (object->myDev->nShortOpCaches > 0) {
4117 yaffs_ChunkCache *cache = yaffs_FindChunkCache(object, chunkId);
4120 cache->object = NULL;
4124 /* Invalidate all the cache pages associated with this object
4125 * Do this whenever ther file is deleted or resized.
4127 static void yaffs_InvalidateWholeChunkCache(yaffs_Object *in)
4130 yaffs_Device *dev = in->myDev;
4132 if (dev->nShortOpCaches > 0) {
4133 /* Invalidate it. */
4134 for (i = 0; i < dev->nShortOpCaches; i++) {
4135 if (dev->srCache[i].object == in)
4136 dev->srCache[i].object = NULL;
4141 /*--------------------- Checkpointing --------------------*/
4144 static int yaffs_WriteCheckpointValidityMarker(yaffs_Device *dev, int head)
4146 yaffs_CheckpointValidity cp;
4148 memset(&cp, 0, sizeof(cp));
4150 cp.structType = sizeof(cp);
4151 cp.magic = YAFFS_MAGIC;
4152 cp.version = YAFFS_CHECKPOINT_VERSION;
4153 cp.head = (head) ? 1 : 0;
4155 return (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp)) ?
4159 static int yaffs_ReadCheckpointValidityMarker(yaffs_Device *dev, int head)
4161 yaffs_CheckpointValidity cp;
4164 ok = (yaffs_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp));
4167 ok = (cp.structType == sizeof(cp)) &&
4168 (cp.magic == YAFFS_MAGIC) &&
4169 (cp.version == YAFFS_CHECKPOINT_VERSION) &&
4170 (cp.head == ((head) ? 1 : 0));
4174 static void yaffs_DeviceToCheckpointDevice(yaffs_CheckpointDevice *cp,
4177 cp->nErasedBlocks = dev->nErasedBlocks;
4178 cp->allocationBlock = dev->allocationBlock;
4179 cp->allocationPage = dev->allocationPage;
4180 cp->nFreeChunks = dev->nFreeChunks;
4182 cp->nDeletedFiles = dev->nDeletedFiles;
4183 cp->nUnlinkedFiles = dev->nUnlinkedFiles;
4184 cp->nBackgroundDeletions = dev->nBackgroundDeletions;
4185 cp->sequenceNumber = dev->sequenceNumber;
4186 cp->oldestDirtySequence = dev->oldestDirtySequence;
4190 static void yaffs_CheckpointDeviceToDevice(yaffs_Device *dev,
4191 yaffs_CheckpointDevice *cp)
4193 dev->nErasedBlocks = cp->nErasedBlocks;
4194 dev->allocationBlock = cp->allocationBlock;
4195 dev->allocationPage = cp->allocationPage;
4196 dev->nFreeChunks = cp->nFreeChunks;
4198 dev->nDeletedFiles = cp->nDeletedFiles;
4199 dev->nUnlinkedFiles = cp->nUnlinkedFiles;
4200 dev->nBackgroundDeletions = cp->nBackgroundDeletions;
4201 dev->sequenceNumber = cp->sequenceNumber;
4202 dev->oldestDirtySequence = cp->oldestDirtySequence;
4206 static int yaffs_WriteCheckpointDevice(yaffs_Device *dev)
4208 yaffs_CheckpointDevice cp;
4210 __u32 nBlocks = (dev->internalEndBlock - dev->internalStartBlock + 1);
4214 /* Write device runtime values*/
4215 yaffs_DeviceToCheckpointDevice(&cp, dev);
4216 cp.structType = sizeof(cp);
4218 ok = (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp));
4220 /* Write block info */
4222 nBytes = nBlocks * sizeof(yaffs_BlockInfo);
4223 ok = (yaffs_CheckpointWrite(dev, dev->blockInfo, nBytes) == nBytes);
4226 /* Write chunk bits */
4228 nBytes = nBlocks * dev->chunkBitmapStride;
4229 ok = (yaffs_CheckpointWrite(dev, dev->chunkBits, nBytes) == nBytes);
4235 static int yaffs_ReadCheckpointDevice(yaffs_Device *dev)
4237 yaffs_CheckpointDevice cp;
4239 __u32 nBlocks = (dev->internalEndBlock - dev->internalStartBlock + 1);
4243 ok = (yaffs_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp));
4247 if (cp.structType != sizeof(cp))
4251 yaffs_CheckpointDeviceToDevice(dev, &cp);
4253 nBytes = nBlocks * sizeof(yaffs_BlockInfo);
4255 ok = (yaffs_CheckpointRead(dev, dev->blockInfo, nBytes) == nBytes);
4259 nBytes = nBlocks * dev->chunkBitmapStride;
4261 ok = (yaffs_CheckpointRead(dev, dev->chunkBits, nBytes) == nBytes);
4266 static void yaffs_ObjectToCheckpointObject(yaffs_CheckpointObject *cp,
4270 cp->objectId = obj->objectId;
4271 cp->parentId = (obj->parent) ? obj->parent->objectId : 0;
4272 cp->hdrChunk = obj->hdrChunk;
4273 cp->variantType = obj->variantType;
4274 cp->deleted = obj->deleted;
4275 cp->softDeleted = obj->softDeleted;
4276 cp->unlinked = obj->unlinked;
4277 cp->fake = obj->fake;
4278 cp->renameAllowed = obj->renameAllowed;
4279 cp->unlinkAllowed = obj->unlinkAllowed;
4280 cp->serial = obj->serial;
4281 cp->nDataChunks = obj->nDataChunks;
4283 if (obj->variantType == YAFFS_OBJECT_TYPE_FILE)
4284 cp->fileSizeOrEquivalentObjectId = obj->variant.fileVariant.fileSize;
4285 else if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK)
4286 cp->fileSizeOrEquivalentObjectId = obj->variant.hardLinkVariant.equivalentObjectId;
4289 static int yaffs_CheckpointObjectToObject(yaffs_Object *obj, yaffs_CheckpointObject *cp)
4292 yaffs_Object *parent;
4294 if (obj->variantType != cp->variantType) {
4295 T(YAFFS_TRACE_ERROR, (TSTR("Checkpoint read object %d type %d "
4296 TCONT("chunk %d does not match existing object type %d")
4297 TENDSTR), cp->objectId, cp->variantType, cp->hdrChunk,
4302 obj->objectId = cp->objectId;
4305 parent = yaffs_FindOrCreateObjectByNumber(
4308 YAFFS_OBJECT_TYPE_DIRECTORY);
4313 if (parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
4314 T(YAFFS_TRACE_ALWAYS, (TSTR("Checkpoint read object %d parent %d type %d"
4315 TCONT(" chunk %d Parent type, %d, not directory")
4317 cp->objectId, cp->parentId, cp->variantType,
4318 cp->hdrChunk, parent->variantType));
4321 yaffs_AddObjectToDirectory(parent, obj);
4324 obj->hdrChunk = cp->hdrChunk;
4325 obj->variantType = cp->variantType;
4326 obj->deleted = cp->deleted;
4327 obj->softDeleted = cp->softDeleted;
4328 obj->unlinked = cp->unlinked;
4329 obj->fake = cp->fake;
4330 obj->renameAllowed = cp->renameAllowed;
4331 obj->unlinkAllowed = cp->unlinkAllowed;
4332 obj->serial = cp->serial;
4333 obj->nDataChunks = cp->nDataChunks;
4335 if (obj->variantType == YAFFS_OBJECT_TYPE_FILE)
4336 obj->variant.fileVariant.fileSize = cp->fileSizeOrEquivalentObjectId;
4337 else if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK)
4338 obj->variant.hardLinkVariant.equivalentObjectId = cp->fileSizeOrEquivalentObjectId;
4340 if (obj->hdrChunk > 0)
4341 obj->lazyLoaded = 1;
4347 static int yaffs_CheckpointTnodeWorker(yaffs_Object *in, yaffs_Tnode *tn,
4348 __u32 level, int chunkOffset)
4351 yaffs_Device *dev = in->myDev;
4353 int tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
4355 if (tnodeSize < sizeof(yaffs_Tnode))
4356 tnodeSize = sizeof(yaffs_Tnode);
4362 for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++) {
4363 if (tn->internal[i]) {
4364 ok = yaffs_CheckpointTnodeWorker(in,
4367 (chunkOffset<<YAFFS_TNODES_INTERNAL_BITS) + i);
4370 } else if (level == 0) {
4371 __u32 baseOffset = chunkOffset << YAFFS_TNODES_LEVEL0_BITS;
4372 ok = (yaffs_CheckpointWrite(dev, &baseOffset, sizeof(baseOffset)) == sizeof(baseOffset));
4374 ok = (yaffs_CheckpointWrite(dev, tn, tnodeSize) == tnodeSize);
4382 static int yaffs_WriteCheckpointTnodes(yaffs_Object *obj)
4384 __u32 endMarker = ~0;
4387 if (obj->variantType == YAFFS_OBJECT_TYPE_FILE) {
4388 ok = yaffs_CheckpointTnodeWorker(obj,
4389 obj->variant.fileVariant.top,
4390 obj->variant.fileVariant.topLevel,
4393 ok = (yaffs_CheckpointWrite(obj->myDev, &endMarker, sizeof(endMarker)) ==
4400 static int yaffs_ReadCheckpointTnodes(yaffs_Object *obj)
4404 yaffs_Device *dev = obj->myDev;
4405 yaffs_FileStructure *fileStructPtr = &obj->variant.fileVariant;
4408 int tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
4410 if (tnodeSize < sizeof(yaffs_Tnode))
4411 tnodeSize = sizeof(yaffs_Tnode);
4413 ok = (yaffs_CheckpointRead(dev, &baseChunk, sizeof(baseChunk)) == sizeof(baseChunk));
4415 while (ok && (~baseChunk)) {
4417 /* Read level 0 tnode */
4420 tn = yaffs_GetTnodeRaw(dev);
4422 ok = (yaffs_CheckpointRead(dev, tn, tnodeSize) == tnodeSize);
4427 ok = yaffs_AddOrFindLevel0Tnode(dev,
4433 ok = (yaffs_CheckpointRead(dev, &baseChunk, sizeof(baseChunk)) == sizeof(baseChunk));
4437 T(YAFFS_TRACE_CHECKPOINT, (
4438 TSTR("Checkpoint read tnodes %d records, last %d. ok %d" TENDSTR),
4439 nread, baseChunk, ok));
4445 static int yaffs_WriteCheckpointObjects(yaffs_Device *dev)
4448 yaffs_CheckpointObject cp;
4451 struct ylist_head *lh;
4454 /* Iterate through the objects in each hash entry,
4455 * dumping them to the checkpointing stream.
4458 for (i = 0; ok && i < YAFFS_NOBJECT_BUCKETS; i++) {
4459 ylist_for_each(lh, &dev->objectBucket[i].list) {
4461 obj = ylist_entry(lh, yaffs_Object, hashLink);
4462 if (!obj->deferedFree) {
4463 yaffs_ObjectToCheckpointObject(&cp, obj);
4464 cp.structType = sizeof(cp);
4466 T(YAFFS_TRACE_CHECKPOINT, (
4467 TSTR("Checkpoint write object %d parent %d type %d chunk %d obj addr %x" TENDSTR),
4468 cp.objectId, cp.parentId, cp.variantType, cp.hdrChunk, (unsigned) obj));
4470 ok = (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp));
4472 if (ok && obj->variantType == YAFFS_OBJECT_TYPE_FILE)
4473 ok = yaffs_WriteCheckpointTnodes(obj);
4479 /* Dump end of list */
4480 memset(&cp, 0xFF, sizeof(yaffs_CheckpointObject));
4481 cp.structType = sizeof(cp);
4484 ok = (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp));
4489 static int yaffs_ReadCheckpointObjects(yaffs_Device *dev)
4492 yaffs_CheckpointObject cp;
4495 yaffs_Object *hardList = NULL;
4497 while (ok && !done) {
4498 ok = (yaffs_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp));
4499 if (cp.structType != sizeof(cp)) {
4500 T(YAFFS_TRACE_CHECKPOINT, (TSTR("struct size %d instead of %d ok %d"TENDSTR),
4501 cp.structType, sizeof(cp), ok));
4505 T(YAFFS_TRACE_CHECKPOINT, (TSTR("Checkpoint read object %d parent %d type %d chunk %d " TENDSTR),
4506 cp.objectId, cp.parentId, cp.variantType, cp.hdrChunk));
4508 if (ok && cp.objectId == ~0)
4511 obj = yaffs_FindOrCreateObjectByNumber(dev, cp.objectId, cp.variantType);
4513 ok = yaffs_CheckpointObjectToObject(obj, &cp);
4516 if (obj->variantType == YAFFS_OBJECT_TYPE_FILE) {
4517 ok = yaffs_ReadCheckpointTnodes(obj);
4518 } else if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) {
4519 obj->hardLinks.next =
4520 (struct ylist_head *) hardList;
4529 yaffs_HardlinkFixup(dev, hardList);
4534 static int yaffs_WriteCheckpointSum(yaffs_Device *dev)
4536 __u32 checkpointSum;
4539 yaffs_GetCheckpointSum(dev, &checkpointSum);
4541 ok = (yaffs_CheckpointWrite(dev, &checkpointSum, sizeof(checkpointSum)) == sizeof(checkpointSum));
4549 static int yaffs_ReadCheckpointSum(yaffs_Device *dev)
4551 __u32 checkpointSum0;
4552 __u32 checkpointSum1;
4555 yaffs_GetCheckpointSum(dev, &checkpointSum0);
4557 ok = (yaffs_CheckpointRead(dev, &checkpointSum1, sizeof(checkpointSum1)) == sizeof(checkpointSum1));
4562 if (checkpointSum0 != checkpointSum1)
4569 static int yaffs_WriteCheckpointData(yaffs_Device *dev)
4573 if (dev->skipCheckpointWrite || !dev->isYaffs2) {
4574 T(YAFFS_TRACE_CHECKPOINT, (TSTR("skipping checkpoint write" TENDSTR)));
4579 ok = yaffs_CheckpointOpen(dev, 1);
4582 T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint validity" TENDSTR)));
4583 ok = yaffs_WriteCheckpointValidityMarker(dev, 1);
4586 T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint device" TENDSTR)));
4587 ok = yaffs_WriteCheckpointDevice(dev);
4590 T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint objects" TENDSTR)));
4591 ok = yaffs_WriteCheckpointObjects(dev);
4594 T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint validity" TENDSTR)));
4595 ok = yaffs_WriteCheckpointValidityMarker(dev, 0);
4599 ok = yaffs_WriteCheckpointSum(dev);
4601 if (!yaffs_CheckpointClose(dev))
4605 dev->isCheckpointed = 1;
4607 dev->isCheckpointed = 0;
4609 return dev->isCheckpointed;
4612 static int yaffs_ReadCheckpointData(yaffs_Device *dev)
4616 if (dev->skipCheckpointRead || !dev->isYaffs2) {
4617 T(YAFFS_TRACE_CHECKPOINT, (TSTR("skipping checkpoint read" TENDSTR)));
4622 ok = yaffs_CheckpointOpen(dev, 0); /* open for read */
4625 T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint validity" TENDSTR)));
4626 ok = yaffs_ReadCheckpointValidityMarker(dev, 1);
4629 T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint device" TENDSTR)));
4630 ok = yaffs_ReadCheckpointDevice(dev);
4633 T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint objects" TENDSTR)));
4634 ok = yaffs_ReadCheckpointObjects(dev);
4637 T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint validity" TENDSTR)));
4638 ok = yaffs_ReadCheckpointValidityMarker(dev, 0);
4642 ok = yaffs_ReadCheckpointSum(dev);
4643 T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint checksum %d" TENDSTR), ok));
4646 if (!yaffs_CheckpointClose(dev))
4650 dev->isCheckpointed = 1;
4652 dev->isCheckpointed = 0;
4658 static void yaffs_InvalidateCheckpoint(yaffs_Device *dev)
4660 if (dev->isCheckpointed ||
4661 dev->blocksInCheckpoint > 0) {
4662 dev->isCheckpointed = 0;
4663 yaffs_CheckpointInvalidateStream(dev);
4664 if (dev->superBlock && dev->markSuperBlockDirty)
4665 dev->markSuperBlockDirty(dev->superBlock);
4670 int yaffs_CheckpointSave(yaffs_Device *dev)
4673 T(YAFFS_TRACE_CHECKPOINT, (TSTR("save entry: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
4675 yaffs_VerifyObjects(dev);
4676 yaffs_VerifyBlocks(dev);
4677 yaffs_VerifyFreeChunks(dev);
4679 if (!dev->isCheckpointed) {
4680 yaffs_InvalidateCheckpoint(dev);
4681 yaffs_WriteCheckpointData(dev);
4684 T(YAFFS_TRACE_ALWAYS, (TSTR("save exit: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
4686 return dev->isCheckpointed;
4689 int yaffs_CheckpointRestore(yaffs_Device *dev)
4692 T(YAFFS_TRACE_CHECKPOINT, (TSTR("restore entry: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
4694 retval = yaffs_ReadCheckpointData(dev);
4696 if (dev->isCheckpointed) {
4697 yaffs_VerifyObjects(dev);
4698 yaffs_VerifyBlocks(dev);
4699 yaffs_VerifyFreeChunks(dev);
4702 T(YAFFS_TRACE_CHECKPOINT, (TSTR("restore exit: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
4707 /*--------------------- File read/write ------------------------
4708 * Read and write have very similar structures.
4709 * In general the read/write has three parts to it
4710 * An incomplete chunk to start with (if the read/write is not chunk-aligned)
4711 * Some complete chunks
4712 * An incomplete chunk to end off with
4714 * Curve-balls: the first chunk might also be the last chunk.
4717 int yaffs_ReadDataFromFile(yaffs_Object *in, __u8 *buffer, loff_t offset,
4726 yaffs_ChunkCache *cache;
4733 /* chunk = offset / dev->nDataBytesPerChunk + 1; */
4734 /* start = offset % dev->nDataBytesPerChunk; */
4735 yaffs_AddrToChunk(dev, offset, &chunk, &start);
4738 /* OK now check for the curveball where the start and end are in
4741 if ((start + n) < dev->nDataBytesPerChunk)
4744 nToCopy = dev->nDataBytesPerChunk - start;
4746 cache = yaffs_FindChunkCache(in, chunk);
4748 /* If the chunk is already in the cache or it is less than a whole chunk
4749 * or we're using inband tags then use the cache (if there is caching)
4750 * else bypass the cache.
4752 if (cache || nToCopy != dev->nDataBytesPerChunk || dev->inbandTags) {
4753 if (dev->nShortOpCaches > 0) {
4755 /* If we can't find the data in the cache, then load it up. */
4758 cache = yaffs_GrabChunkCache(in->myDev);
4760 cache->chunkId = chunk;
4763 yaffs_ReadChunkDataFromObject(in, chunk,
4769 yaffs_UseChunkCache(dev, cache, 0);
4774 memcpy(buffer, &cache->data[start], nToCopy);
4778 /* Read into the local buffer then copy..*/
4781 yaffs_GetTempBuffer(dev, __LINE__);
4782 yaffs_ReadChunkDataFromObject(in, chunk,
4785 memcpy(buffer, &localBuffer[start], nToCopy);
4788 yaffs_ReleaseTempBuffer(dev, localBuffer,
4794 /* A full chunk. Read directly into the supplied buffer. */
4795 yaffs_ReadChunkDataFromObject(in, chunk, buffer);
4809 int yaffs_WriteDataToFile(yaffs_Object *in, const __u8 *buffer, loff_t offset,
4810 int nBytes, int writeThrough)
4819 int startOfWrite = offset;
4820 int chunkWritten = 0;
4828 while (n > 0 && chunkWritten >= 0) {
4829 /* chunk = offset / dev->nDataBytesPerChunk + 1; */
4830 /* start = offset % dev->nDataBytesPerChunk; */
4831 yaffs_AddrToChunk(dev, offset, &chunk, &start);
4833 if (chunk * dev->nDataBytesPerChunk + start != offset ||
4834 start >= dev->nDataBytesPerChunk) {
4835 T(YAFFS_TRACE_ERROR, (
4836 TSTR("AddrToChunk of offset %d gives chunk %d start %d"
4838 (int)offset, chunk, start));
4842 /* OK now check for the curveball where the start and end are in
4846 if ((start + n) < dev->nDataBytesPerChunk) {
4849 /* Now folks, to calculate how many bytes to write back....
4850 * If we're overwriting and not writing to then end of file then
4851 * we need to write back as much as was there before.
4854 chunkStart = ((chunk - 1) * dev->nDataBytesPerChunk);
4856 if (chunkStart > in->variant.fileVariant.fileSize)
4857 nBytesRead = 0; /* Past end of file */
4859 nBytesRead = in->variant.fileVariant.fileSize - chunkStart;
4861 if (nBytesRead > dev->nDataBytesPerChunk)
4862 nBytesRead = dev->nDataBytesPerChunk;
4866 (start + n)) ? nBytesRead : (start + n);
4868 if (nToWriteBack < 0 || nToWriteBack > dev->nDataBytesPerChunk)
4872 nToCopy = dev->nDataBytesPerChunk - start;
4873 nToWriteBack = dev->nDataBytesPerChunk;
4876 if (nToCopy != dev->nDataBytesPerChunk || dev->inbandTags) {
4877 /* An incomplete start or end chunk (or maybe both start and end chunk),
4878 * or we're using inband tags, so we want to use the cache buffers.
4880 if (dev->nShortOpCaches > 0) {
4881 yaffs_ChunkCache *cache;
4882 /* If we can't find the data in the cache, then load the cache */
4883 cache = yaffs_FindChunkCache(in, chunk);
4886 && yaffs_CheckSpaceForAllocation(in->
4888 cache = yaffs_GrabChunkCache(in->myDev);
4890 cache->chunkId = chunk;
4893 yaffs_ReadChunkDataFromObject(in, chunk,
4898 !yaffs_CheckSpaceForAllocation(in->myDev)) {
4899 /* Drop the cache if it was a read cache item and
4900 * no space check has been made for it.
4906 yaffs_UseChunkCache(dev, cache, 1);
4910 memcpy(&cache->data[start], buffer,
4915 cache->nBytes = nToWriteBack;
4919 yaffs_WriteChunkDataToObject
4922 cache->data, cache->nBytes,
4928 chunkWritten = -1; /* fail the write */
4931 /* An incomplete start or end chunk (or maybe both start and end chunk)
4932 * Read into the local buffer then copy, then copy over and write back.
4936 yaffs_GetTempBuffer(dev, __LINE__);
4938 yaffs_ReadChunkDataFromObject(in, chunk,
4943 memcpy(&localBuffer[start], buffer, nToCopy);
4946 yaffs_WriteChunkDataToObject(in, chunk,
4951 yaffs_ReleaseTempBuffer(dev, localBuffer,
4957 /* A full chunk. Write directly from the supplied buffer. */
4962 yaffs_WriteChunkDataToObject(in, chunk, buffer,
4963 dev->nDataBytesPerChunk,
4966 /* Since we've overwritten the cached data, we better invalidate it. */
4967 yaffs_InvalidateChunkCache(in, chunk);
4970 if (chunkWritten >= 0) {
4979 /* Update file object */
4981 if ((startOfWrite + nDone) > in->variant.fileVariant.fileSize)
4982 in->variant.fileVariant.fileSize = (startOfWrite + nDone);
4990 /* ---------------------- File resizing stuff ------------------ */
4992 static void yaffs_PruneResizedChunks(yaffs_Object *in, int newSize)
4995 yaffs_Device *dev = in->myDev;
4996 int oldFileSize = in->variant.fileVariant.fileSize;
4998 int lastDel = 1 + (oldFileSize - 1) / dev->nDataBytesPerChunk;
5000 int startDel = 1 + (newSize + dev->nDataBytesPerChunk - 1) /
5001 dev->nDataBytesPerChunk;
5005 /* Delete backwards so that we don't end up with holes if
5006 * power is lost part-way through the operation.
5008 for (i = lastDel; i >= startDel; i--) {
5009 /* NB this could be optimised somewhat,
5010 * eg. could retrieve the tags and write them without
5011 * using yaffs_DeleteChunk
5014 chunkId = yaffs_FindAndDeleteChunkInFile(in, i, NULL);
5017 (dev->internalStartBlock * dev->nChunksPerBlock)
5019 ((dev->internalEndBlock +
5020 1) * dev->nChunksPerBlock)) {
5021 T(YAFFS_TRACE_ALWAYS,
5022 (TSTR("Found daft chunkId %d for %d" TENDSTR),
5026 yaffs_DeleteChunk(dev, chunkId, 1, __LINE__);
5033 int yaffs_ResizeFile(yaffs_Object *in, loff_t newSize)
5036 int oldFileSize = in->variant.fileVariant.fileSize;
5037 __u32 newSizeOfPartialChunk;
5040 yaffs_Device *dev = in->myDev;
5042 yaffs_AddrToChunk(dev, newSize, &newFullChunks, &newSizeOfPartialChunk);
5044 yaffs_FlushFilesChunkCache(in);
5045 yaffs_InvalidateWholeChunkCache(in);
5047 yaffs_CheckGarbageCollection(dev);
5049 if (in->variantType != YAFFS_OBJECT_TYPE_FILE)
5052 if (newSize == oldFileSize)
5055 if (newSize < oldFileSize) {
5057 yaffs_PruneResizedChunks(in, newSize);
5059 if (newSizeOfPartialChunk != 0) {
5060 int lastChunk = 1 + newFullChunks;
5062 __u8 *localBuffer = yaffs_GetTempBuffer(dev, __LINE__);
5064 /* Got to read and rewrite the last chunk with its new size and zero pad */
5065 yaffs_ReadChunkDataFromObject(in, lastChunk,
5068 memset(localBuffer + newSizeOfPartialChunk, 0,
5069 dev->nDataBytesPerChunk - newSizeOfPartialChunk);
5071 yaffs_WriteChunkDataToObject(in, lastChunk, localBuffer,
5072 newSizeOfPartialChunk, 1);
5074 yaffs_ReleaseTempBuffer(dev, localBuffer, __LINE__);
5077 in->variant.fileVariant.fileSize = newSize;
5079 yaffs_PruneFileStructure(dev, &in->variant.fileVariant);
5081 /* newsSize > oldFileSize */
5082 in->variant.fileVariant.fileSize = newSize;
5086 /* Write a new object header to reflect the resize.
5087 * show we've shrunk the file, if need be
5088 * Do this only if the file is not in the deleted directories
5089 * and is not shadowed.
5093 in->parent->objectId != YAFFS_OBJECTID_UNLINKED &&
5094 in->parent->objectId != YAFFS_OBJECTID_DELETED)
5095 yaffs_UpdateObjectHeader(in, NULL, 0,
5096 (newSize < oldFileSize) ? 1 : 0, 0);
5101 loff_t yaffs_GetFileSize(yaffs_Object *obj)
5103 YCHAR *alias = NULL;
5104 obj = yaffs_GetEquivalentObject(obj);
5106 switch (obj->variantType) {
5107 case YAFFS_OBJECT_TYPE_FILE:
5108 return obj->variant.fileVariant.fileSize;
5109 case YAFFS_OBJECT_TYPE_SYMLINK:
5110 alias = obj->variant.symLinkVariant.alias;
5113 return yaffs_strnlen(alias,YAFFS_MAX_ALIAS_LENGTH);
5121 int yaffs_FlushFile(yaffs_Object *in, int updateTime, int dataSync)
5125 yaffs_FlushFilesChunkCache(in);
5126 if(dataSync) /* Only sync data */
5130 #ifdef CONFIG_YAFFS_WINCE
5131 yfsd_WinFileTimeNow(in->win_mtime);
5134 in->yst_mtime = Y_CURRENT_TIME;
5139 retVal = (yaffs_UpdateObjectHeader(in, NULL, 0, 0, 0) >=
5140 0) ? YAFFS_OK : YAFFS_FAIL;
5150 static int yaffs_DoGenericObjectDeletion(yaffs_Object *in)
5153 /* First off, invalidate the file's data in the cache, without flushing. */
5154 yaffs_InvalidateWholeChunkCache(in);
5156 if (in->myDev->isYaffs2 && (in->parent != in->myDev->deletedDir)) {
5157 /* Move to the unlinked directory so we have a record that it was deleted. */
5158 yaffs_ChangeObjectName(in, in->myDev->deletedDir, _Y("deleted"), 0, 0);
5162 yaffs_RemoveObjectFromDirectory(in);
5163 yaffs_DeleteChunk(in->myDev, in->hdrChunk, 1, __LINE__);
5166 yaffs_FreeObject(in);
5171 /* yaffs_DeleteFile deletes the whole file data
5172 * and the inode associated with the file.
5173 * It does not delete the links associated with the file.
5175 static int yaffs_UnlinkFileIfNeeded(yaffs_Object *in)
5179 int immediateDeletion = 0;
5183 immediateDeletion = 1;
5186 immediateDeletion = 1;
5189 if (immediateDeletion) {
5191 yaffs_ChangeObjectName(in, in->myDev->deletedDir,
5192 _Y("deleted"), 0, 0);
5193 T(YAFFS_TRACE_TRACING,
5194 (TSTR("yaffs: immediate deletion of file %d" TENDSTR),
5197 in->myDev->nDeletedFiles++;
5198 if (1 || in->myDev->isYaffs2)
5199 yaffs_ResizeFile(in, 0);
5200 yaffs_SoftDeleteFile(in);
5203 yaffs_ChangeObjectName(in, in->myDev->unlinkedDir,
5204 _Y("unlinked"), 0, 0);
5211 int yaffs_DeleteFile(yaffs_Object *in)
5213 int retVal = YAFFS_OK;
5214 int deleted = in->deleted;
5216 yaffs_ResizeFile(in, 0);
5218 if (in->nDataChunks > 0) {
5219 /* Use soft deletion if there is data in the file.
5220 * That won't be the case if it has been resized to zero.
5223 retVal = yaffs_UnlinkFileIfNeeded(in);
5225 if (retVal == YAFFS_OK && in->unlinked && !in->deleted) {
5228 in->myDev->nDeletedFiles++;
5229 yaffs_SoftDeleteFile(in);
5231 return deleted ? YAFFS_OK : YAFFS_FAIL;
5233 /* The file has no data chunks so we toss it immediately */
5234 yaffs_FreeTnode(in->myDev, in->variant.fileVariant.top);
5235 in->variant.fileVariant.top = NULL;
5236 yaffs_DoGenericObjectDeletion(in);
5242 static int yaffs_IsNonEmptyDirectory(yaffs_Object *obj)
5244 return (obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) &&
5245 !(ylist_empty(&obj->variant.directoryVariant.children));
5248 static int yaffs_DeleteDirectory(yaffs_Object *obj)
5250 /* First check that the directory is empty. */
5251 if (yaffs_IsNonEmptyDirectory(obj))
5254 return yaffs_DoGenericObjectDeletion(obj);
5257 static int yaffs_DeleteSymLink(yaffs_Object *in)
5259 if(in->variant.symLinkVariant.alias)
5260 YFREE(in->variant.symLinkVariant.alias);
5261 in->variant.symLinkVariant.alias=NULL;
5263 return yaffs_DoGenericObjectDeletion(in);
5266 static int yaffs_DeleteHardLink(yaffs_Object *in)
5268 /* remove this hardlink from the list assocaited with the equivalent
5271 ylist_del_init(&in->hardLinks);
5272 return yaffs_DoGenericObjectDeletion(in);
5275 int yaffs_DeleteObject(yaffs_Object *obj)
5278 switch (obj->variantType) {
5279 case YAFFS_OBJECT_TYPE_FILE:
5280 retVal = yaffs_DeleteFile(obj);
5282 case YAFFS_OBJECT_TYPE_DIRECTORY:
5283 return yaffs_DeleteDirectory(obj);
5285 case YAFFS_OBJECT_TYPE_SYMLINK:
5286 retVal = yaffs_DeleteSymLink(obj);
5288 case YAFFS_OBJECT_TYPE_HARDLINK:
5289 retVal = yaffs_DeleteHardLink(obj);
5291 case YAFFS_OBJECT_TYPE_SPECIAL:
5292 retVal = yaffs_DoGenericObjectDeletion(obj);
5294 case YAFFS_OBJECT_TYPE_UNKNOWN:
5296 break; /* should not happen. */
5302 static int yaffs_UnlinkWorker(yaffs_Object *obj)
5305 int immediateDeletion = 0;
5309 immediateDeletion = 1;
5311 if (obj->inUse <= 0)
5312 immediateDeletion = 1;
5316 yaffs_UpdateParent(obj->parent);
5318 if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) {
5319 return yaffs_DeleteHardLink(obj);
5320 } else if (!ylist_empty(&obj->hardLinks)) {
5321 /* Curve ball: We're unlinking an object that has a hardlink.
5323 * This problem arises because we are not strictly following
5324 * The Linux link/inode model.
5326 * We can't really delete the object.
5327 * Instead, we do the following:
5328 * - Select a hardlink.
5329 * - Unhook it from the hard links
5330 * - Unhook it from its parent directory (so that the rename can work)
5331 * - Rename the object to the hardlink's name.
5332 * - Delete the hardlink
5337 YCHAR name[YAFFS_MAX_NAME_LENGTH + 1];
5339 hl = ylist_entry(obj->hardLinks.next, yaffs_Object, hardLinks);
5341 ylist_del_init(&hl->hardLinks);
5342 ylist_del_init(&hl->siblings);
5344 yaffs_GetObjectName(hl, name, YAFFS_MAX_NAME_LENGTH + 1);
5346 retVal = yaffs_ChangeObjectName(obj, hl->parent, name, 0, 0);
5348 if (retVal == YAFFS_OK)
5349 retVal = yaffs_DoGenericObjectDeletion(hl);
5353 } else if (immediateDeletion) {
5354 switch (obj->variantType) {
5355 case YAFFS_OBJECT_TYPE_FILE:
5356 return yaffs_DeleteFile(obj);
5358 case YAFFS_OBJECT_TYPE_DIRECTORY:
5359 return yaffs_DeleteDirectory(obj);
5361 case YAFFS_OBJECT_TYPE_SYMLINK:
5362 return yaffs_DeleteSymLink(obj);
5364 case YAFFS_OBJECT_TYPE_SPECIAL:
5365 return yaffs_DoGenericObjectDeletion(obj);
5367 case YAFFS_OBJECT_TYPE_HARDLINK:
5368 case YAFFS_OBJECT_TYPE_UNKNOWN:
5372 } else if(yaffs_IsNonEmptyDirectory(obj))
5375 return yaffs_ChangeObjectName(obj, obj->myDev->unlinkedDir,
5376 _Y("unlinked"), 0, 0);
5380 static int yaffs_UnlinkObject(yaffs_Object *obj)
5383 if (obj && obj->unlinkAllowed)
5384 return yaffs_UnlinkWorker(obj);
5389 int yaffs_Unlink(yaffs_Object *dir, const YCHAR *name)
5393 obj = yaffs_FindObjectByName(dir, name);
5394 return yaffs_UnlinkObject(obj);
5397 /*----------------------- Initialisation Scanning ---------------------- */
5399 static void yaffs_HandleShadowedObject(yaffs_Device *dev, int objId,
5400 int backwardScanning)
5404 if (!backwardScanning) {
5405 /* Handle YAFFS1 forward scanning case
5406 * For YAFFS1 we always do the deletion
5410 /* Handle YAFFS2 case (backward scanning)
5411 * If the shadowed object exists then ignore.
5413 obj = yaffs_FindObjectByNumber(dev, objId);
5418 /* Let's create it (if it does not exist) assuming it is a file so that it can do shrinking etc.
5419 * We put it in unlinked dir to be cleaned up after the scanning
5422 yaffs_FindOrCreateObjectByNumber(dev, objId,
5423 YAFFS_OBJECT_TYPE_FILE);
5426 obj->isShadowed = 1;
5427 yaffs_AddObjectToDirectory(dev->unlinkedDir, obj);
5428 obj->variant.fileVariant.shrinkSize = 0;
5429 obj->valid = 1; /* So that we don't read any other info for this file */
5439 static void yaffs_HardlinkFixup(yaffs_Device *dev, yaffs_Object *hardList)
5446 hardList = (yaffs_Object *) (hardList->hardLinks.next);
5448 in = yaffs_FindObjectByNumber(dev,
5449 hl->variant.hardLinkVariant.
5450 equivalentObjectId);
5453 /* Add the hardlink pointers */
5454 hl->variant.hardLinkVariant.equivalentObject = in;
5455 ylist_add(&hl->hardLinks, &in->hardLinks);
5457 /* Todo Need to report/handle this better.
5458 * Got a problem... hardlink to a non-existant object
5460 hl->variant.hardLinkVariant.equivalentObject = NULL;
5461 YINIT_LIST_HEAD(&hl->hardLinks);
5471 static int ybicmp(const void *a, const void *b)
5473 register int aseq = ((yaffs_BlockIndex *)a)->seq;
5474 register int bseq = ((yaffs_BlockIndex *)b)->seq;
5475 register int ablock = ((yaffs_BlockIndex *)a)->block;
5476 register int bblock = ((yaffs_BlockIndex *)b)->block;
5478 return ablock - bblock;
5484 struct yaffs_ShadowFixerStruct {
5487 struct yaffs_ShadowFixerStruct *next;
5491 static void yaffs_StripDeletedObjects(yaffs_Device *dev)
5494 * Sort out state of unlinked and deleted objects after scanning.
5496 struct ylist_head *i;
5497 struct ylist_head *n;
5500 /* Soft delete all the unlinked files */
5501 ylist_for_each_safe(i, n,
5502 &dev->unlinkedDir->variant.directoryVariant.children) {
5504 l = ylist_entry(i, yaffs_Object, siblings);
5505 yaffs_DeleteObject(l);
5509 ylist_for_each_safe(i, n,
5510 &dev->deletedDir->variant.directoryVariant.children) {
5512 l = ylist_entry(i, yaffs_Object, siblings);
5513 yaffs_DeleteObject(l);
5520 * This code iterates through all the objects making sure that they are rooted.
5521 * Any unrooted objects are re-rooted in lost+found.
5522 * An object needs to be in one of:
5523 * - Directly under deleted, unlinked
5524 * - Directly or indirectly under root.
5527 * This code assumes that we don't ever change the current relationships between
5529 * rootDir->parent == unlinkedDir->parent == deletedDir->parent == NULL
5530 * lostNfound->parent == rootDir
5532 * This fixes the problem where directories might have inadvertently been deleted
5533 * leaving the object "hanging" without being rooted in the directory tree.
5536 static int yaffs_HasNULLParent(yaffs_Device *dev, yaffs_Object *obj)
5538 return (obj == dev->deletedDir ||
5539 obj == dev->unlinkedDir||
5540 obj == dev->rootDir);
5543 static void yaffs_FixHangingObjects(yaffs_Device *dev)
5546 yaffs_Object *parent;
5548 struct ylist_head *lh;
5549 struct ylist_head *n;
5554 /* Iterate through the objects in each hash entry,
5555 * looking at each object.
5556 * Make sure it is rooted.
5559 for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
5560 ylist_for_each_safe(lh, n, &dev->objectBucket[i].list) {
5562 obj = ylist_entry(lh, yaffs_Object, hashLink);
5563 parent= obj->parent;
5565 if(yaffs_HasNULLParent(dev,obj)){
5566 /* These directories are not hanging */
5569 else if(!parent || parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
5571 else if(yaffs_HasNULLParent(dev,parent))
5575 * Need to follow the parent chain to see if it is hanging.
5580 while(parent != dev->rootDir &&
5582 parent->parent->variantType == YAFFS_OBJECT_TYPE_DIRECTORY &&
5584 parent = parent->parent;
5587 if(parent != dev->rootDir)
5592 (TSTR("Hanging object %d moved to lost and found" TENDSTR),
5594 yaffs_AddObjectToDirectory(dev->lostNFoundDir,obj);
5603 * Delete directory contents for cleaning up lost and found.
5605 static void yaffs_DeleteDirectoryContents(yaffs_Object *dir)
5608 struct ylist_head *lh;
5609 struct ylist_head *n;
5611 if(dir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
5614 ylist_for_each_safe(lh, n, &dir->variant.directoryVariant.children) {
5616 obj = ylist_entry(lh, yaffs_Object, siblings);
5617 if(obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY)
5618 yaffs_DeleteDirectoryContents(obj);
5621 (TSTR("Deleting lost_found object %d" TENDSTR),
5624 /* Need to use UnlinkObject since Delete would not handle
5625 * hardlinked objects correctly.
5627 yaffs_UnlinkObject(obj);
5633 static void yaffs_EmptyLostAndFound(yaffs_Device *dev)
5635 yaffs_DeleteDirectoryContents(dev->lostNFoundDir);
5638 static int yaffs_Scan(yaffs_Device *dev)
5640 yaffs_ExtendedTags tags;
5650 yaffs_BlockState state;
5651 yaffs_Object *hardList = NULL;
5652 yaffs_BlockInfo *bi;
5653 __u32 sequenceNumber;
5654 yaffs_ObjectHeader *oh;
5656 yaffs_Object *parent;
5658 int alloc_failed = 0;
5660 struct yaffs_ShadowFixerStruct *shadowFixerList = NULL;
5668 (TSTR("yaffs_Scan starts intstartblk %d intendblk %d..." TENDSTR),
5669 dev->internalStartBlock, dev->internalEndBlock));
5671 chunkData = yaffs_GetTempBuffer(dev, __LINE__);
5673 dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER;
5675 /* Scan all the blocks to determine their state */
5676 for (blk = dev->internalStartBlock; blk <= dev->internalEndBlock; blk++) {
5677 bi = yaffs_GetBlockInfo(dev, blk);
5678 yaffs_ClearChunkBits(dev, blk);
5680 bi->softDeletions = 0;
5682 yaffs_QueryInitialBlockState(dev, blk, &state, &sequenceNumber);
5684 bi->blockState = state;
5685 bi->sequenceNumber = sequenceNumber;
5687 if (bi->sequenceNumber == YAFFS_SEQUENCE_BAD_BLOCK)
5688 bi->blockState = state = YAFFS_BLOCK_STATE_DEAD;
5690 T(YAFFS_TRACE_SCAN_DEBUG,
5691 (TSTR("Block scanning block %d state %d seq %d" TENDSTR), blk,
5692 state, sequenceNumber));
5694 if (state == YAFFS_BLOCK_STATE_DEAD) {
5695 T(YAFFS_TRACE_BAD_BLOCKS,
5696 (TSTR("block %d is bad" TENDSTR), blk));
5697 } else if (state == YAFFS_BLOCK_STATE_EMPTY) {
5698 T(YAFFS_TRACE_SCAN_DEBUG,
5699 (TSTR("Block empty " TENDSTR)));
5700 dev->nErasedBlocks++;
5701 dev->nFreeChunks += dev->nChunksPerBlock;
5705 startIterator = dev->internalStartBlock;
5706 endIterator = dev->internalEndBlock;
5708 /* For each block.... */
5709 for (blockIterator = startIterator; !alloc_failed && blockIterator <= endIterator;
5716 blk = blockIterator;
5718 bi = yaffs_GetBlockInfo(dev, blk);
5719 state = bi->blockState;
5723 /* For each chunk in each block that needs scanning....*/
5724 for (c = 0; !alloc_failed && c < dev->nChunksPerBlock &&
5725 state == YAFFS_BLOCK_STATE_NEEDS_SCANNING; c++) {
5726 /* Read the tags and decide what to do */
5727 chunk = blk * dev->nChunksPerBlock + c;
5729 result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk, NULL,
5732 /* Let's have a good look at this chunk... */
5734 if (tags.eccResult == YAFFS_ECC_RESULT_UNFIXED || tags.chunkDeleted) {
5740 /*T((" %d %d deleted\n",blk,c)); */
5741 } else if (!tags.chunkUsed) {
5742 /* An unassigned chunk in the block
5743 * This means that either the block is empty or
5744 * this is the one being allocated from
5748 /* We're looking at the first chunk in the block so the block is unused */
5749 state = YAFFS_BLOCK_STATE_EMPTY;
5750 dev->nErasedBlocks++;
5752 /* this is the block being allocated from */
5755 (" Allocating from %d %d" TENDSTR),
5757 state = YAFFS_BLOCK_STATE_ALLOCATING;
5758 dev->allocationBlock = blk;
5759 dev->allocationPage = c;
5760 dev->allocationBlockFinder = blk;
5761 /* Set it to here to encourage the allocator to go forth from here. */
5765 dev->nFreeChunks += (dev->nChunksPerBlock - c);
5766 } else if (tags.chunkId > 0) {
5767 /* chunkId > 0 so it is a data chunk... */
5768 unsigned int endpos;
5770 yaffs_SetChunkBit(dev, blk, c);
5773 in = yaffs_FindOrCreateObjectByNumber(dev,
5776 YAFFS_OBJECT_TYPE_FILE);
5777 /* PutChunkIntoFile checks for a clash (two data chunks with
5778 * the same chunkId).
5785 if (!yaffs_PutChunkIntoFile(in, tags.chunkId, chunk, 1))
5790 (tags.chunkId - 1) * dev->nDataBytesPerChunk +
5793 in->variantType == YAFFS_OBJECT_TYPE_FILE
5794 && in->variant.fileVariant.scannedFileSize <
5796 in->variant.fileVariant.
5797 scannedFileSize = endpos;
5798 if (!dev->useHeaderFileSize) {
5799 in->variant.fileVariant.
5801 in->variant.fileVariant.
5806 /* T((" %d %d data %d %d\n",blk,c,tags.objectId,tags.chunkId)); */
5808 /* chunkId == 0, so it is an ObjectHeader.
5809 * Thus, we read in the object header and make the object
5811 yaffs_SetChunkBit(dev, blk, c);
5814 result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk,
5818 oh = (yaffs_ObjectHeader *) chunkData;
5820 in = yaffs_FindObjectByNumber(dev,
5822 if (in && in->variantType != oh->type) {
5823 /* This should not happen, but somehow
5824 * Wev'e ended up with an objectId that has been reused but not yet
5825 * deleted, and worse still it has changed type. Delete the old object.
5828 yaffs_DeleteObject(in);
5833 in = yaffs_FindOrCreateObjectByNumber(dev,
5841 if (in && oh->shadowsObject > 0) {
5843 struct yaffs_ShadowFixerStruct *fixer;
5844 fixer = YMALLOC(sizeof(struct yaffs_ShadowFixerStruct));
5846 fixer->next = shadowFixerList;
5847 shadowFixerList = fixer;
5848 fixer->objectId = tags.objectId;
5849 fixer->shadowedId = oh->shadowsObject;
5854 if (in && in->valid) {
5855 /* We have already filled this one. We have a duplicate and need to resolve it. */
5857 unsigned existingSerial = in->serial;
5858 unsigned newSerial = tags.serialNumber;
5860 if (((existingSerial + 1) & 3) == newSerial) {
5861 /* Use new one - destroy the exisiting one */
5862 yaffs_DeleteChunk(dev,
5867 /* Use existing - destroy this one. */
5868 yaffs_DeleteChunk(dev, chunk, 1,
5873 if (in && !in->valid &&
5874 (tags.objectId == YAFFS_OBJECTID_ROOT ||
5875 tags.objectId == YAFFS_OBJECTID_LOSTNFOUND)) {
5876 /* We only load some info, don't fiddle with directory structure */
5878 in->variantType = oh->type;
5880 in->yst_mode = oh->yst_mode;
5881 #ifdef CONFIG_YAFFS_WINCE
5882 in->win_atime[0] = oh->win_atime[0];
5883 in->win_ctime[0] = oh->win_ctime[0];
5884 in->win_mtime[0] = oh->win_mtime[0];
5885 in->win_atime[1] = oh->win_atime[1];
5886 in->win_ctime[1] = oh->win_ctime[1];
5887 in->win_mtime[1] = oh->win_mtime[1];
5889 in->yst_uid = oh->yst_uid;
5890 in->yst_gid = oh->yst_gid;
5891 in->yst_atime = oh->yst_atime;
5892 in->yst_mtime = oh->yst_mtime;
5893 in->yst_ctime = oh->yst_ctime;
5894 in->yst_rdev = oh->yst_rdev;
5896 in->hdrChunk = chunk;
5897 in->serial = tags.serialNumber;
5899 } else if (in && !in->valid) {
5900 /* we need to load this info */
5903 in->variantType = oh->type;
5905 in->yst_mode = oh->yst_mode;
5906 #ifdef CONFIG_YAFFS_WINCE
5907 in->win_atime[0] = oh->win_atime[0];
5908 in->win_ctime[0] = oh->win_ctime[0];
5909 in->win_mtime[0] = oh->win_mtime[0];
5910 in->win_atime[1] = oh->win_atime[1];
5911 in->win_ctime[1] = oh->win_ctime[1];
5912 in->win_mtime[1] = oh->win_mtime[1];
5914 in->yst_uid = oh->yst_uid;
5915 in->yst_gid = oh->yst_gid;
5916 in->yst_atime = oh->yst_atime;
5917 in->yst_mtime = oh->yst_mtime;
5918 in->yst_ctime = oh->yst_ctime;
5919 in->yst_rdev = oh->yst_rdev;
5921 in->hdrChunk = chunk;
5922 in->serial = tags.serialNumber;
5924 yaffs_SetObjectName(in, oh->name);
5927 /* directory stuff...
5932 yaffs_FindOrCreateObjectByNumber
5933 (dev, oh->parentObjectId,
5934 YAFFS_OBJECT_TYPE_DIRECTORY);
5937 if (parent && parent->variantType ==
5938 YAFFS_OBJECT_TYPE_UNKNOWN) {
5939 /* Set up as a directory */
5940 parent->variantType =
5941 YAFFS_OBJECT_TYPE_DIRECTORY;
5942 YINIT_LIST_HEAD(&parent->variant.
5945 } else if (!parent || parent->variantType !=
5946 YAFFS_OBJECT_TYPE_DIRECTORY) {
5947 /* Hoosterman, another problem....
5948 * We're trying to use a non-directory as a directory
5951 T(YAFFS_TRACE_ERROR,
5953 ("yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found."
5955 parent = dev->lostNFoundDir;
5958 yaffs_AddObjectToDirectory(parent, in);
5960 if (0 && (parent == dev->deletedDir ||
5961 parent == dev->unlinkedDir)) {
5962 in->deleted = 1; /* If it is unlinked at start up then it wants deleting */
5963 dev->nDeletedFiles++;
5965 /* Note re hardlinks.
5966 * Since we might scan a hardlink before its equivalent object is scanned
5967 * we put them all in a list.
5968 * After scanning is complete, we should have all the objects, so we run through this
5969 * list and fix up all the chains.
5972 switch (in->variantType) {
5973 case YAFFS_OBJECT_TYPE_UNKNOWN:
5974 /* Todo got a problem */
5976 case YAFFS_OBJECT_TYPE_FILE:
5977 if (dev->useHeaderFileSize)
5979 in->variant.fileVariant.
5984 case YAFFS_OBJECT_TYPE_HARDLINK:
5985 in->variant.hardLinkVariant.
5986 equivalentObjectId =
5987 oh->equivalentObjectId;
5988 in->hardLinks.next =
5989 (struct ylist_head *)
5993 case YAFFS_OBJECT_TYPE_DIRECTORY:
5996 case YAFFS_OBJECT_TYPE_SPECIAL:
5999 case YAFFS_OBJECT_TYPE_SYMLINK:
6000 in->variant.symLinkVariant.alias =
6001 yaffs_CloneString(oh->alias);
6002 if (!in->variant.symLinkVariant.alias)
6008 if (parent == dev->deletedDir) {
6009 yaffs_DestroyObject(in);
6010 bi->hasShrinkHeader = 1;
6017 if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
6018 /* If we got this far while scanning, then the block is fully allocated.*/
6019 state = YAFFS_BLOCK_STATE_FULL;
6022 bi->blockState = state;
6024 /* Now let's see if it was dirty */
6025 if (bi->pagesInUse == 0 &&
6026 !bi->hasShrinkHeader &&
6027 bi->blockState == YAFFS_BLOCK_STATE_FULL) {
6028 yaffs_BlockBecameDirty(dev, blk);
6034 /* Ok, we've done all the scanning.
6035 * Fix up the hard link chains.
6036 * We should now have scanned all the objects, now it's time to add these
6040 yaffs_HardlinkFixup(dev, hardList);
6042 /* Fix up any shadowed objects */
6044 struct yaffs_ShadowFixerStruct *fixer;
6047 while (shadowFixerList) {
6048 fixer = shadowFixerList;
6049 shadowFixerList = fixer->next;
6050 /* Complete the rename transaction by deleting the shadowed object
6051 * then setting the object header to unshadowed.
6053 obj = yaffs_FindObjectByNumber(dev, fixer->shadowedId);
6055 yaffs_DeleteObject(obj);
6057 obj = yaffs_FindObjectByNumber(dev, fixer->objectId);
6060 yaffs_UpdateObjectHeader(obj, NULL, 1, 0, 0);
6066 yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
6071 T(YAFFS_TRACE_SCAN, (TSTR("yaffs_Scan ends" TENDSTR)));
6077 static void yaffs_CheckObjectDetailsLoaded(yaffs_Object *in)
6080 yaffs_ObjectHeader *oh;
6082 yaffs_ExtendedTags tags;
6084 int alloc_failed = 0;
6092 T(YAFFS_TRACE_SCAN, (TSTR("details for object %d %s loaded" TENDSTR),
6094 in->lazyLoaded ? "not yet" : "already"));
6097 if (in->lazyLoaded && in->hdrChunk > 0) {
6099 chunkData = yaffs_GetTempBuffer(dev, __LINE__);
6101 result = yaffs_ReadChunkWithTagsFromNAND(dev, in->hdrChunk, chunkData, &tags);
6102 oh = (yaffs_ObjectHeader *) chunkData;
6104 in->yst_mode = oh->yst_mode;
6105 #ifdef CONFIG_YAFFS_WINCE
6106 in->win_atime[0] = oh->win_atime[0];
6107 in->win_ctime[0] = oh->win_ctime[0];
6108 in->win_mtime[0] = oh->win_mtime[0];
6109 in->win_atime[1] = oh->win_atime[1];
6110 in->win_ctime[1] = oh->win_ctime[1];
6111 in->win_mtime[1] = oh->win_mtime[1];
6113 in->yst_uid = oh->yst_uid;
6114 in->yst_gid = oh->yst_gid;
6115 in->yst_atime = oh->yst_atime;
6116 in->yst_mtime = oh->yst_mtime;
6117 in->yst_ctime = oh->yst_ctime;
6118 in->yst_rdev = oh->yst_rdev;
6121 yaffs_SetObjectName(in, oh->name);
6123 if (in->variantType == YAFFS_OBJECT_TYPE_SYMLINK) {
6124 in->variant.symLinkVariant.alias =
6125 yaffs_CloneString(oh->alias);
6126 if (!in->variant.symLinkVariant.alias)
6127 alloc_failed = 1; /* Not returned to caller */
6130 yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
6134 static int yaffs_ScanBackwards(yaffs_Device *dev)
6136 yaffs_ExtendedTags tags;
6141 int nBlocksToScan = 0;
6147 yaffs_BlockState state;
6148 yaffs_Object *hardList = NULL;
6149 yaffs_BlockInfo *bi;
6150 __u32 sequenceNumber;
6151 yaffs_ObjectHeader *oh;
6153 yaffs_Object *parent;
6154 int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1;
6160 int foundChunksInBlock;
6161 int equivalentObjectId;
6162 int alloc_failed = 0;
6165 yaffs_BlockIndex *blockIndex = NULL;
6166 int altBlockIndex = 0;
6168 if (!dev->isYaffs2) {
6170 (TSTR("yaffs_ScanBackwards is only for YAFFS2!" TENDSTR)));
6176 ("yaffs_ScanBackwards starts intstartblk %d intendblk %d..."
6177 TENDSTR), dev->internalStartBlock, dev->internalEndBlock));
6180 dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER;
6182 blockIndex = YMALLOC(nBlocks * sizeof(yaffs_BlockIndex));
6185 blockIndex = YMALLOC_ALT(nBlocks * sizeof(yaffs_BlockIndex));
6191 (TSTR("yaffs_Scan() could not allocate block index!" TENDSTR)));
6195 dev->blocksInCheckpoint = 0;
6197 chunkData = yaffs_GetTempBuffer(dev, __LINE__);
6199 /* Scan all the blocks to determine their state */
6200 for (blk = dev->internalStartBlock; blk <= dev->internalEndBlock; blk++) {
6201 bi = yaffs_GetBlockInfo(dev, blk);
6202 yaffs_ClearChunkBits(dev, blk);
6204 bi->softDeletions = 0;
6206 yaffs_QueryInitialBlockState(dev, blk, &state, &sequenceNumber);
6208 bi->blockState = state;
6209 bi->sequenceNumber = sequenceNumber;
6211 if (bi->sequenceNumber == YAFFS_SEQUENCE_CHECKPOINT_DATA)
6212 bi->blockState = state = YAFFS_BLOCK_STATE_CHECKPOINT;
6213 if (bi->sequenceNumber == YAFFS_SEQUENCE_BAD_BLOCK)
6214 bi->blockState = state = YAFFS_BLOCK_STATE_DEAD;
6216 T(YAFFS_TRACE_SCAN_DEBUG,
6217 (TSTR("Block scanning block %d state %d seq %d" TENDSTR), blk,
6218 state, sequenceNumber));
6221 if (state == YAFFS_BLOCK_STATE_CHECKPOINT) {
6222 dev->blocksInCheckpoint++;
6224 } else if (state == YAFFS_BLOCK_STATE_DEAD) {
6225 T(YAFFS_TRACE_BAD_BLOCKS,
6226 (TSTR("block %d is bad" TENDSTR), blk));
6227 } else if (state == YAFFS_BLOCK_STATE_EMPTY) {
6228 T(YAFFS_TRACE_SCAN_DEBUG,
6229 (TSTR("Block empty " TENDSTR)));
6230 dev->nErasedBlocks++;
6231 dev->nFreeChunks += dev->nChunksPerBlock;
6232 } else if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
6234 /* Determine the highest sequence number */
6235 if (sequenceNumber >= YAFFS_LOWEST_SEQUENCE_NUMBER &&
6236 sequenceNumber < YAFFS_HIGHEST_SEQUENCE_NUMBER) {
6238 blockIndex[nBlocksToScan].seq = sequenceNumber;
6239 blockIndex[nBlocksToScan].block = blk;
6243 if (sequenceNumber >= dev->sequenceNumber)
6244 dev->sequenceNumber = sequenceNumber;
6246 /* TODO: Nasty sequence number! */
6249 ("Block scanning block %d has bad sequence number %d"
6250 TENDSTR), blk, sequenceNumber));
6257 (TSTR("%d blocks to be sorted..." TENDSTR), nBlocksToScan));
6263 /* Sort the blocks */
6264 #ifndef CONFIG_YAFFS_USE_OWN_SORT
6266 /* Use qsort now. */
6267 yaffs_qsort(blockIndex, nBlocksToScan, sizeof(yaffs_BlockIndex), ybicmp);
6271 /* Dungy old bubble sort... */
6273 yaffs_BlockIndex temp;
6277 for (i = 0; i < nBlocksToScan; i++)
6278 for (j = i + 1; j < nBlocksToScan; j++)
6279 if (blockIndex[i].seq > blockIndex[j].seq) {
6280 temp = blockIndex[j];
6281 blockIndex[j] = blockIndex[i];
6282 blockIndex[i] = temp;
6289 T(YAFFS_TRACE_SCAN, (TSTR("...done" TENDSTR)));
6291 /* Now scan the blocks looking at the data. */
6293 endIterator = nBlocksToScan - 1;
6294 T(YAFFS_TRACE_SCAN_DEBUG,
6295 (TSTR("%d blocks to be scanned" TENDSTR), nBlocksToScan));
6297 /* For each block.... backwards */
6298 for (blockIterator = endIterator; !alloc_failed && blockIterator >= startIterator;
6300 /* Cooperative multitasking! This loop can run for so
6301 long that watchdog timers expire. */
6304 /* get the block to scan in the correct order */
6305 blk = blockIndex[blockIterator].block;
6307 bi = yaffs_GetBlockInfo(dev, blk);
6310 state = bi->blockState;
6314 /* For each chunk in each block that needs scanning.... */
6315 foundChunksInBlock = 0;
6316 for (c = dev->nChunksPerBlock - 1;
6317 !alloc_failed && c >= 0 &&
6318 (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
6319 state == YAFFS_BLOCK_STATE_ALLOCATING); c--) {
6320 /* Scan backwards...
6321 * Read the tags and decide what to do
6324 chunk = blk * dev->nChunksPerBlock + c;
6326 result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk, NULL,
6329 /* Let's have a good look at this chunk... */
6331 if (!tags.chunkUsed) {
6332 /* An unassigned chunk in the block.
6333 * If there are used chunks after this one, then
6334 * it is a chunk that was skipped due to failing the erased
6335 * check. Just skip it so that it can be deleted.
6336 * But, more typically, We get here when this is an unallocated
6337 * chunk and his means that either the block is empty or
6338 * this is the one being allocated from
6341 if (foundChunksInBlock) {
6342 /* This is a chunk that was skipped due to failing the erased check */
6343 } else if (c == 0) {
6344 /* We're looking at the first chunk in the block so the block is unused */
6345 state = YAFFS_BLOCK_STATE_EMPTY;
6346 dev->nErasedBlocks++;
6348 if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
6349 state == YAFFS_BLOCK_STATE_ALLOCATING) {
6350 if (dev->sequenceNumber == bi->sequenceNumber) {
6351 /* this is the block being allocated from */
6355 (" Allocating from %d %d"
6358 state = YAFFS_BLOCK_STATE_ALLOCATING;
6359 dev->allocationBlock = blk;
6360 dev->allocationPage = c;
6361 dev->allocationBlockFinder = blk;
6363 /* This is a partially written block that is not
6364 * the current allocation block. This block must have
6365 * had a write failure, so set up for retirement.
6368 /* bi->needsRetiring = 1; ??? TODO */
6369 bi->gcPrioritise = 1;
6371 T(YAFFS_TRACE_ALWAYS,
6372 (TSTR("Partially written block %d detected" TENDSTR),
6380 } else if (tags.eccResult == YAFFS_ECC_RESULT_UNFIXED) {
6382 (TSTR(" Unfixed ECC in chunk(%d:%d), chunk ignored"TENDSTR),
6387 } else if (tags.chunkId > 0) {
6388 /* chunkId > 0 so it is a data chunk... */
6389 unsigned int endpos;
6391 (tags.chunkId - 1) * dev->nDataBytesPerChunk;
6393 foundChunksInBlock = 1;
6396 yaffs_SetChunkBit(dev, blk, c);
6399 in = yaffs_FindOrCreateObjectByNumber(dev,
6402 YAFFS_OBJECT_TYPE_FILE);
6409 in->variantType == YAFFS_OBJECT_TYPE_FILE
6411 in->variant.fileVariant.shrinkSize) {
6412 /* This has not been invalidated by a resize */
6413 if (!yaffs_PutChunkIntoFile(in, tags.chunkId,
6418 /* File size is calculated by looking at the data chunks if we have not
6419 * seen an object header yet. Stop this practice once we find an object header.
6423 1) * dev->nDataBytesPerChunk +
6426 if (!in->valid && /* have not got an object header yet */
6427 in->variant.fileVariant.
6428 scannedFileSize < endpos) {
6429 in->variant.fileVariant.
6430 scannedFileSize = endpos;
6431 in->variant.fileVariant.
6433 in->variant.fileVariant.
6438 /* This chunk has been invalidated by a resize, so delete */
6439 yaffs_DeleteChunk(dev, chunk, 1, __LINE__);
6443 /* chunkId == 0, so it is an ObjectHeader.
6444 * Thus, we read in the object header and make the object
6446 foundChunksInBlock = 1;
6448 yaffs_SetChunkBit(dev, blk, c);
6454 if (tags.extraHeaderInfoAvailable) {
6455 in = yaffs_FindOrCreateObjectByNumber
6456 (dev, tags.objectId,
6457 tags.extraObjectType);
6463 (!in->valid && dev->disableLazyLoad) ||
6464 tags.extraShadows ||
6466 (tags.objectId == YAFFS_OBJECTID_ROOT ||
6467 tags.objectId == YAFFS_OBJECTID_LOSTNFOUND))) {
6469 /* If we don't have valid info then we need to read the chunk
6470 * TODO In future we can probably defer reading the chunk and
6471 * living with invalid data until needed.
6474 result = yaffs_ReadChunkWithTagsFromNAND(dev,
6479 oh = (yaffs_ObjectHeader *) chunkData;
6481 if (dev->inbandTags) {
6482 /* Fix up the header if they got corrupted by inband tags */
6483 oh->shadowsObject = oh->inbandShadowsObject;
6484 oh->isShrink = oh->inbandIsShrink;
6488 in = yaffs_FindOrCreateObjectByNumber(dev, tags.objectId, oh->type);
6496 /* TODO Hoosterman we have a problem! */
6497 T(YAFFS_TRACE_ERROR,
6499 ("yaffs tragedy: Could not make object for object %d at chunk %d during scan"
6500 TENDSTR), tags.objectId, chunk));
6505 /* We have already filled this one.
6506 * We have a duplicate that will be discarded, but
6507 * we first have to suck out resize info if it is a file.
6510 if ((in->variantType == YAFFS_OBJECT_TYPE_FILE) &&
6512 oh->type == YAFFS_OBJECT_TYPE_FILE) ||
6513 (tags.extraHeaderInfoAvailable &&
6514 tags.extraObjectType == YAFFS_OBJECT_TYPE_FILE))) {
6516 (oh) ? oh->fileSize : tags.
6518 __u32 parentObjectId =
6520 parentObjectId : tags.
6521 extraParentObjectId;
6525 (oh) ? oh->isShrink : tags.
6526 extraIsShrinkHeader;
6528 /* If it is deleted (unlinked at start also means deleted)
6529 * we treat the file size as being zeroed at this point.
6531 if (parentObjectId ==
6532 YAFFS_OBJECTID_DELETED
6533 || parentObjectId ==
6534 YAFFS_OBJECTID_UNLINKED) {
6540 in->variant.fileVariant.
6541 shrinkSize > thisSize) {
6542 in->variant.fileVariant.
6548 bi->hasShrinkHeader = 1;
6551 /* Use existing - destroy this one. */
6552 yaffs_DeleteChunk(dev, chunk, 1, __LINE__);
6556 if (!in->valid && in->variantType !=
6557 (oh ? oh->type : tags.extraObjectType))
6558 T(YAFFS_TRACE_ERROR, (
6559 TSTR("yaffs tragedy: Bad object type, "
6560 TCONT("%d != %d, for object %d at chunk ")
6561 TCONT("%d during scan")
6563 oh->type : tags.extraObjectType,
6564 in->variantType, tags.objectId,
6568 (tags.objectId == YAFFS_OBJECTID_ROOT ||
6570 YAFFS_OBJECTID_LOSTNFOUND)) {
6571 /* We only load some info, don't fiddle with directory structure */
6575 in->variantType = oh->type;
6577 in->yst_mode = oh->yst_mode;
6578 #ifdef CONFIG_YAFFS_WINCE
6579 in->win_atime[0] = oh->win_atime[0];
6580 in->win_ctime[0] = oh->win_ctime[0];
6581 in->win_mtime[0] = oh->win_mtime[0];
6582 in->win_atime[1] = oh->win_atime[1];
6583 in->win_ctime[1] = oh->win_ctime[1];
6584 in->win_mtime[1] = oh->win_mtime[1];
6586 in->yst_uid = oh->yst_uid;
6587 in->yst_gid = oh->yst_gid;
6588 in->yst_atime = oh->yst_atime;
6589 in->yst_mtime = oh->yst_mtime;
6590 in->yst_ctime = oh->yst_ctime;
6591 in->yst_rdev = oh->yst_rdev;
6595 in->variantType = tags.extraObjectType;
6599 in->hdrChunk = chunk;
6601 } else if (!in->valid) {
6602 /* we need to load this info */
6605 in->hdrChunk = chunk;
6608 in->variantType = oh->type;
6610 in->yst_mode = oh->yst_mode;
6611 #ifdef CONFIG_YAFFS_WINCE
6612 in->win_atime[0] = oh->win_atime[0];
6613 in->win_ctime[0] = oh->win_ctime[0];
6614 in->win_mtime[0] = oh->win_mtime[0];
6615 in->win_atime[1] = oh->win_atime[1];
6616 in->win_ctime[1] = oh->win_ctime[1];
6617 in->win_mtime[1] = oh->win_mtime[1];
6619 in->yst_uid = oh->yst_uid;
6620 in->yst_gid = oh->yst_gid;
6621 in->yst_atime = oh->yst_atime;
6622 in->yst_mtime = oh->yst_mtime;
6623 in->yst_ctime = oh->yst_ctime;
6624 in->yst_rdev = oh->yst_rdev;
6627 if (oh->shadowsObject > 0)
6628 yaffs_HandleShadowedObject(dev,
6634 yaffs_SetObjectName(in, oh->name);
6636 yaffs_FindOrCreateObjectByNumber
6637 (dev, oh->parentObjectId,
6638 YAFFS_OBJECT_TYPE_DIRECTORY);
6640 fileSize = oh->fileSize;
6641 isShrink = oh->isShrink;
6642 equivalentObjectId = oh->equivalentObjectId;
6645 in->variantType = tags.extraObjectType;
6647 yaffs_FindOrCreateObjectByNumber
6648 (dev, tags.extraParentObjectId,
6649 YAFFS_OBJECT_TYPE_DIRECTORY);
6650 fileSize = tags.extraFileLength;
6651 isShrink = tags.extraIsShrinkHeader;
6652 equivalentObjectId = tags.extraEquivalentObjectId;
6661 /* directory stuff...
6665 if (parent && parent->variantType ==
6666 YAFFS_OBJECT_TYPE_UNKNOWN) {
6667 /* Set up as a directory */
6668 parent->variantType =
6669 YAFFS_OBJECT_TYPE_DIRECTORY;
6670 YINIT_LIST_HEAD(&parent->variant.
6673 } else if (!parent || parent->variantType !=
6674 YAFFS_OBJECT_TYPE_DIRECTORY) {
6675 /* Hoosterman, another problem....
6676 * We're trying to use a non-directory as a directory
6679 T(YAFFS_TRACE_ERROR,
6681 ("yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found."
6683 parent = dev->lostNFoundDir;
6686 yaffs_AddObjectToDirectory(parent, in);
6688 itsUnlinked = (parent == dev->deletedDir) ||
6689 (parent == dev->unlinkedDir);
6692 /* Mark the block as having a shrinkHeader */
6693 bi->hasShrinkHeader = 1;
6696 /* Note re hardlinks.
6697 * Since we might scan a hardlink before its equivalent object is scanned
6698 * we put them all in a list.
6699 * After scanning is complete, we should have all the objects, so we run
6700 * through this list and fix up all the chains.
6703 switch (in->variantType) {
6704 case YAFFS_OBJECT_TYPE_UNKNOWN:
6705 /* Todo got a problem */
6707 case YAFFS_OBJECT_TYPE_FILE:
6709 if (in->variant.fileVariant.
6710 scannedFileSize < fileSize) {
6711 /* This covers the case where the file size is greater
6712 * than where the data is
6713 * This will happen if the file is resized to be larger
6714 * than its current data extents.
6716 in->variant.fileVariant.fileSize = fileSize;
6717 in->variant.fileVariant.scannedFileSize =
6718 in->variant.fileVariant.fileSize;
6722 in->variant.fileVariant.shrinkSize > fileSize) {
6723 in->variant.fileVariant.shrinkSize = fileSize;
6727 case YAFFS_OBJECT_TYPE_HARDLINK:
6729 in->variant.hardLinkVariant.equivalentObjectId =
6731 in->hardLinks.next =
6732 (struct ylist_head *) hardList;
6736 case YAFFS_OBJECT_TYPE_DIRECTORY:
6739 case YAFFS_OBJECT_TYPE_SPECIAL:
6742 case YAFFS_OBJECT_TYPE_SYMLINK:
6744 in->variant.symLinkVariant.alias =
6745 yaffs_CloneString(oh->alias);
6746 if (!in->variant.symLinkVariant.alias)
6756 } /* End of scanning for each chunk */
6758 if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
6759 /* If we got this far while scanning, then the block is fully allocated. */
6760 state = YAFFS_BLOCK_STATE_FULL;
6763 bi->blockState = state;
6765 /* Now let's see if it was dirty */
6766 if (bi->pagesInUse == 0 &&
6767 !bi->hasShrinkHeader &&
6768 bi->blockState == YAFFS_BLOCK_STATE_FULL) {
6769 yaffs_BlockBecameDirty(dev, blk);
6775 YFREE_ALT(blockIndex);
6779 /* Ok, we've done all the scanning.
6780 * Fix up the hard link chains.
6781 * We should now have scanned all the objects, now it's time to add these
6784 yaffs_HardlinkFixup(dev, hardList);
6787 yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
6792 T(YAFFS_TRACE_SCAN, (TSTR("yaffs_ScanBackwards ends" TENDSTR)));
6797 /*------------------------------ Directory Functions ----------------------------- */
6799 static void yaffs_VerifyObjectInDirectory(yaffs_Object *obj)
6801 struct ylist_head *lh;
6802 yaffs_Object *listObj;
6807 T(YAFFS_TRACE_ALWAYS, (TSTR("No object to verify" TENDSTR)));
6812 if (yaffs_SkipVerification(obj->myDev))
6816 T(YAFFS_TRACE_ALWAYS, (TSTR("Object does not have parent" TENDSTR)));
6821 if (obj->parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
6822 T(YAFFS_TRACE_ALWAYS, (TSTR("Parent is not directory" TENDSTR)));
6826 /* Iterate through the objects in each hash entry */
6828 ylist_for_each(lh, &obj->parent->variant.directoryVariant.children) {
6830 listObj = ylist_entry(lh, yaffs_Object, siblings);
6831 yaffs_VerifyObject(listObj);
6838 T(YAFFS_TRACE_ALWAYS, (TSTR("Object in directory %d times" TENDSTR), count));
6843 static void yaffs_VerifyDirectory(yaffs_Object *directory)
6845 struct ylist_head *lh;
6846 yaffs_Object *listObj;
6853 if (yaffs_SkipFullVerification(directory->myDev))
6856 if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
6857 T(YAFFS_TRACE_ALWAYS, (TSTR("Directory has wrong type: %d" TENDSTR), directory->variantType));
6861 /* Iterate through the objects in each hash entry */
6863 ylist_for_each(lh, &directory->variant.directoryVariant.children) {
6865 listObj = ylist_entry(lh, yaffs_Object, siblings);
6866 if (listObj->parent != directory) {
6867 T(YAFFS_TRACE_ALWAYS, (TSTR("Object in directory list has wrong parent %p" TENDSTR), listObj->parent));
6870 yaffs_VerifyObjectInDirectory(listObj);
6876 *yaffs_UpdateParent() handles fixing a directories mtime and ctime when a new
6877 * link (ie. name) is created or deleted in the directory.
6880 * create dir/a : update dir's mtime/ctime
6881 * rm dir/a: update dir's mtime/ctime
6882 * modify dir/a: don't update dir's mtimme/ctime
6885 static void yaffs_UpdateParent(yaffs_Object *obj)
6891 obj->yst_mtime = obj->yst_ctime = Y_CURRENT_TIME;
6893 yaffs_UpdateObjectHeader(obj,NULL,0,0,0);
6896 static void yaffs_RemoveObjectFromDirectory(yaffs_Object *obj)
6898 yaffs_Device *dev = obj->myDev;
6899 yaffs_Object *parent;
6901 yaffs_VerifyObjectInDirectory(obj);
6902 parent = obj->parent;
6904 yaffs_VerifyDirectory(parent);
6906 if (dev && dev->removeObjectCallback)
6907 dev->removeObjectCallback(obj);
6910 ylist_del_init(&obj->siblings);
6913 yaffs_VerifyDirectory(parent);
6916 static void yaffs_AddObjectToDirectory(yaffs_Object *directory,
6920 T(YAFFS_TRACE_ALWAYS,
6922 ("tragedy: Trying to add an object to a null pointer directory"
6927 if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
6928 T(YAFFS_TRACE_ALWAYS,
6930 ("tragedy: Trying to add an object to a non-directory"
6935 if (obj->siblings.prev == NULL) {
6936 /* Not initialised */
6941 yaffs_VerifyDirectory(directory);
6943 yaffs_RemoveObjectFromDirectory(obj);
6947 ylist_add(&obj->siblings, &directory->variant.directoryVariant.children);
6948 obj->parent = directory;
6950 if (directory == obj->myDev->unlinkedDir
6951 || directory == obj->myDev->deletedDir) {
6953 obj->myDev->nUnlinkedFiles++;
6954 obj->renameAllowed = 0;
6957 yaffs_VerifyDirectory(directory);
6958 yaffs_VerifyObjectInDirectory(obj);
6961 yaffs_Object *yaffs_FindObjectByName(yaffs_Object *directory,
6966 struct ylist_head *i;
6967 YCHAR buffer[YAFFS_MAX_NAME_LENGTH + 1];
6975 T(YAFFS_TRACE_ALWAYS,
6977 ("tragedy: yaffs_FindObjectByName: null pointer directory"
6982 if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
6983 T(YAFFS_TRACE_ALWAYS,
6985 ("tragedy: yaffs_FindObjectByName: non-directory" TENDSTR)));
6989 sum = yaffs_CalcNameSum(name);
6991 ylist_for_each(i, &directory->variant.directoryVariant.children) {
6993 l = ylist_entry(i, yaffs_Object, siblings);
6995 if (l->parent != directory)
6998 yaffs_CheckObjectDetailsLoaded(l);
7000 /* Special case for lost-n-found */
7001 if (l->objectId == YAFFS_OBJECTID_LOSTNFOUND) {
7002 if (yaffs_strcmp(name, YAFFS_LOSTNFOUND_NAME) == 0)
7004 } else if (yaffs_SumCompare(l->sum, sum) || l->hdrChunk <= 0) {
7005 /* LostnFound chunk called Objxxx
7008 yaffs_GetObjectName(l, buffer,
7009 YAFFS_MAX_NAME_LENGTH + 1);
7010 if (yaffs_strncmp(name, buffer, YAFFS_MAX_NAME_LENGTH) == 0)
7021 int yaffs_ApplyToDirectoryChildren(yaffs_Object *theDir,
7022 int (*fn) (yaffs_Object *))
7024 struct ylist_head *i;
7028 T(YAFFS_TRACE_ALWAYS,
7030 ("tragedy: yaffs_FindObjectByName: null pointer directory"
7035 if (theDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
7036 T(YAFFS_TRACE_ALWAYS,
7038 ("tragedy: yaffs_FindObjectByName: non-directory" TENDSTR)));
7043 ylist_for_each(i, &theDir->variant.directoryVariant.children) {
7045 l = ylist_entry(i, yaffs_Object, siblings);
7056 /* GetEquivalentObject dereferences any hard links to get to the
7060 yaffs_Object *yaffs_GetEquivalentObject(yaffs_Object *obj)
7062 if (obj && obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) {
7063 /* We want the object id of the equivalent object, not this one */
7064 obj = obj->variant.hardLinkVariant.equivalentObject;
7065 yaffs_CheckObjectDetailsLoaded(obj);
7070 int yaffs_GetObjectName(yaffs_Object *obj, YCHAR *name, int buffSize)
7072 memset(name, 0, buffSize * sizeof(YCHAR));
7074 yaffs_CheckObjectDetailsLoaded(obj);
7076 if (obj->objectId == YAFFS_OBJECTID_LOSTNFOUND) {
7077 yaffs_strncpy(name, YAFFS_LOSTNFOUND_NAME, buffSize - 1);
7078 } else if (obj->hdrChunk <= 0) {
7080 YCHAR numString[20];
7081 YCHAR *x = &numString[19];
7082 unsigned v = obj->objectId;
7086 *x = '0' + (v % 10);
7089 /* make up a name */
7090 yaffs_strcpy(locName, YAFFS_LOSTNFOUND_PREFIX);
7091 yaffs_strcat(locName, x);
7092 yaffs_strncpy(name, locName, buffSize - 1);
7095 #ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM
7096 else if (obj->shortName[0])
7097 yaffs_strncpy(name, obj->shortName,YAFFS_SHORT_NAME_LENGTH+1);
7101 __u8 *buffer = yaffs_GetTempBuffer(obj->myDev, __LINE__);
7103 yaffs_ObjectHeader *oh = (yaffs_ObjectHeader *) buffer;
7105 memset(buffer, 0, obj->myDev->nDataBytesPerChunk);
7107 if (obj->hdrChunk > 0) {
7108 result = yaffs_ReadChunkWithTagsFromNAND(obj->myDev,
7109 obj->hdrChunk, buffer,
7112 yaffs_strncpy(name, oh->name, buffSize - 1);
7115 yaffs_ReleaseTempBuffer(obj->myDev, buffer, __LINE__);
7118 return yaffs_strnlen(name,buffSize-1);
7121 int yaffs_GetObjectFileLength(yaffs_Object *obj)
7123 /* Dereference any hard linking */
7124 obj = yaffs_GetEquivalentObject(obj);
7126 if (obj->variantType == YAFFS_OBJECT_TYPE_FILE)
7127 return obj->variant.fileVariant.fileSize;
7128 if (obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK){
7129 if(!obj->variant.symLinkVariant.alias)
7131 return yaffs_strnlen(obj->variant.symLinkVariant.alias,YAFFS_MAX_ALIAS_LENGTH);
7133 /* Only a directory should drop through to here */
7134 return obj->myDev->nDataBytesPerChunk;
7138 int yaffs_GetObjectLinkCount(yaffs_Object *obj)
7141 struct ylist_head *i;
7144 count++; /* the object itself */
7146 ylist_for_each(i, &obj->hardLinks)
7147 count++; /* add the hard links; */
7152 int yaffs_GetObjectInode(yaffs_Object *obj)
7154 obj = yaffs_GetEquivalentObject(obj);
7156 return obj->objectId;
7159 unsigned yaffs_GetObjectType(yaffs_Object *obj)
7161 obj = yaffs_GetEquivalentObject(obj);
7163 switch (obj->variantType) {
7164 case YAFFS_OBJECT_TYPE_FILE:
7167 case YAFFS_OBJECT_TYPE_DIRECTORY:
7170 case YAFFS_OBJECT_TYPE_SYMLINK:
7173 case YAFFS_OBJECT_TYPE_HARDLINK:
7176 case YAFFS_OBJECT_TYPE_SPECIAL:
7177 if (S_ISFIFO(obj->yst_mode))
7179 if (S_ISCHR(obj->yst_mode))
7181 if (S_ISBLK(obj->yst_mode))
7183 if (S_ISSOCK(obj->yst_mode))
7191 YCHAR *yaffs_GetSymlinkAlias(yaffs_Object *obj)
7193 obj = yaffs_GetEquivalentObject(obj);
7194 if (obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK)
7195 return yaffs_CloneString(obj->variant.symLinkVariant.alias);
7197 return yaffs_CloneString(_Y(""));
7200 #ifndef CONFIG_YAFFS_WINCE
7202 int yaffs_SetAttributes(yaffs_Object *obj, struct iattr *attr)
7204 unsigned int valid = attr->ia_valid;
7206 if (valid & ATTR_MODE)
7207 obj->yst_mode = attr->ia_mode;
7208 if (valid & ATTR_UID)
7209 obj->yst_uid = attr->ia_uid;
7210 if (valid & ATTR_GID)
7211 obj->yst_gid = attr->ia_gid;
7213 if (valid & ATTR_ATIME)
7214 obj->yst_atime = Y_TIME_CONVERT(attr->ia_atime);
7215 if (valid & ATTR_CTIME)
7216 obj->yst_ctime = Y_TIME_CONVERT(attr->ia_ctime);
7217 if (valid & ATTR_MTIME)
7218 obj->yst_mtime = Y_TIME_CONVERT(attr->ia_mtime);
7220 if (valid & ATTR_SIZE)
7221 yaffs_ResizeFile(obj, attr->ia_size);
7223 yaffs_UpdateObjectHeader(obj, NULL, 1, 0, 0);
7228 int yaffs_GetAttributes(yaffs_Object *obj, struct iattr *attr)
7230 unsigned int valid = 0;
7232 attr->ia_mode = obj->yst_mode;
7234 attr->ia_uid = obj->yst_uid;
7236 attr->ia_gid = obj->yst_gid;
7239 Y_TIME_CONVERT(attr->ia_atime) = obj->yst_atime;
7240 valid |= ATTR_ATIME;
7241 Y_TIME_CONVERT(attr->ia_ctime) = obj->yst_ctime;
7242 valid |= ATTR_CTIME;
7243 Y_TIME_CONVERT(attr->ia_mtime) = obj->yst_mtime;
7244 valid |= ATTR_MTIME;
7246 attr->ia_size = yaffs_GetFileSize(obj);
7249 attr->ia_valid = valid;
7257 int yaffs_DumpObject(yaffs_Object *obj)
7261 yaffs_GetObjectName(obj, name, YAFFS_MAX_NAME_LENGTH + 1);
7263 T(YAFFS_TRACE_ALWAYS,
7265 ("Object %d, inode %d \"%s\"\n dirty %d valid %d serial %d sum %d"
7266 " chunk %d type %d size %d\n"
7267 TENDSTR), obj->objectId, yaffs_GetObjectInode(obj), name,
7268 obj->dirty, obj->valid, obj->serial, obj->sum, obj->hdrChunk,
7269 yaffs_GetObjectType(obj), yaffs_GetObjectFileLength(obj)));
7275 /*---------------------------- Initialisation code -------------------------------------- */
7277 static int yaffs_CheckDevFunctions(const yaffs_Device *dev)
7280 /* Common functions, gotta have */
7281 if (!dev->eraseBlockInNAND || !dev->initialiseNAND)
7284 #ifdef CONFIG_YAFFS_YAFFS2
7286 /* Can use the "with tags" style interface for yaffs1 or yaffs2 */
7287 if (dev->writeChunkWithTagsToNAND &&
7288 dev->readChunkWithTagsFromNAND &&
7289 !dev->writeChunkToNAND &&
7290 !dev->readChunkFromNAND &&
7291 dev->markNANDBlockBad && dev->queryNANDBlock)
7295 /* Can use the "spare" style interface for yaffs1 */
7296 if (!dev->isYaffs2 &&
7297 !dev->writeChunkWithTagsToNAND &&
7298 !dev->readChunkWithTagsFromNAND &&
7299 dev->writeChunkToNAND &&
7300 dev->readChunkFromNAND &&
7301 !dev->markNANDBlockBad && !dev->queryNANDBlock)
7308 static int yaffs_CreateInitialDirectories(yaffs_Device *dev)
7310 /* Initialise the unlinked, deleted, root and lost and found directories */
7312 dev->lostNFoundDir = dev->rootDir = NULL;
7313 dev->unlinkedDir = dev->deletedDir = NULL;
7316 yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_UNLINKED, S_IFDIR);
7319 yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_DELETED, S_IFDIR);
7322 yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_ROOT,
7323 YAFFS_ROOT_MODE | S_IFDIR);
7324 dev->lostNFoundDir =
7325 yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_LOSTNFOUND,
7326 YAFFS_LOSTNFOUND_MODE | S_IFDIR);
7328 if (dev->lostNFoundDir && dev->rootDir && dev->unlinkedDir && dev->deletedDir) {
7329 yaffs_AddObjectToDirectory(dev->rootDir, dev->lostNFoundDir);
7336 int yaffs_GutsInitialise(yaffs_Device *dev)
7338 int init_failed = 0;
7342 T(YAFFS_TRACE_TRACING, (TSTR("yaffs: yaffs_GutsInitialise()" TENDSTR)));
7344 /* Check stuff that must be set */
7347 T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Need a device" TENDSTR)));
7351 dev->internalStartBlock = dev->startBlock;
7352 dev->internalEndBlock = dev->endBlock;
7353 dev->blockOffset = 0;
7354 dev->chunkOffset = 0;
7355 dev->nFreeChunks = 0;
7359 if (dev->startBlock == 0) {
7360 dev->internalStartBlock = dev->startBlock + 1;
7361 dev->internalEndBlock = dev->endBlock + 1;
7362 dev->blockOffset = 1;
7363 dev->chunkOffset = dev->nChunksPerBlock;
7366 /* Check geometry parameters. */
7368 if ((!dev->inbandTags && dev->isYaffs2 && dev->totalBytesPerChunk < 1024) ||
7369 (!dev->isYaffs2 && dev->totalBytesPerChunk < 512) ||
7370 (dev->inbandTags && !dev->isYaffs2) ||
7371 dev->nChunksPerBlock < 2 ||
7372 dev->nReservedBlocks < 2 ||
7373 dev->internalStartBlock <= 0 ||
7374 dev->internalEndBlock <= 0 ||
7375 dev->internalEndBlock <= (dev->internalStartBlock + dev->nReservedBlocks + 2)) { /* otherwise it is too small */
7376 T(YAFFS_TRACE_ALWAYS,
7378 ("yaffs: NAND geometry problems: chunk size %d, type is yaffs%s, inbandTags %d "
7379 TENDSTR), dev->totalBytesPerChunk, dev->isYaffs2 ? "2" : "", dev->inbandTags));
7383 if (yaffs_InitialiseNAND(dev) != YAFFS_OK) {
7384 T(YAFFS_TRACE_ALWAYS,
7385 (TSTR("yaffs: InitialiseNAND failed" TENDSTR)));
7389 /* Sort out space for inband tags, if required */
7390 if (dev->inbandTags)
7391 dev->nDataBytesPerChunk = dev->totalBytesPerChunk - sizeof(yaffs_PackedTags2TagsPart);
7393 dev->nDataBytesPerChunk = dev->totalBytesPerChunk;
7395 /* Got the right mix of functions? */
7396 if (!yaffs_CheckDevFunctions(dev)) {
7397 /* Function missing */
7398 T(YAFFS_TRACE_ALWAYS,
7400 ("yaffs: device function(s) missing or wrong\n" TENDSTR)));
7405 /* This is really a compilation check. */
7406 if (!yaffs_CheckStructures()) {
7407 T(YAFFS_TRACE_ALWAYS,
7408 (TSTR("yaffs_CheckStructures failed\n" TENDSTR)));
7412 if (dev->isMounted) {
7413 T(YAFFS_TRACE_ALWAYS,
7414 (TSTR("yaffs: device already mounted\n" TENDSTR)));
7418 /* Finished with most checks. One or two more checks happen later on too. */
7422 /* OK now calculate a few things for the device */
7425 * Calculate all the chunk size manipulation numbers:
7427 x = dev->nDataBytesPerChunk;
7428 /* We always use dev->chunkShift and dev->chunkDiv */
7429 dev->chunkShift = Shifts(x);
7430 x >>= dev->chunkShift;
7432 /* We only use chunk mask if chunkDiv is 1 */
7433 dev->chunkMask = (1<<dev->chunkShift) - 1;
7436 * Calculate chunkGroupBits.
7437 * We need to find the next power of 2 > than internalEndBlock
7440 x = dev->nChunksPerBlock * (dev->internalEndBlock + 1);
7444 /* Set up tnode width if wide tnodes are enabled. */
7445 if (!dev->wideTnodesDisabled) {
7446 /* bits must be even so that we end up with 32-bit words */
7450 dev->tnodeWidth = 16;
7452 dev->tnodeWidth = bits;
7454 dev->tnodeWidth = 16;
7456 dev->tnodeMask = (1<<dev->tnodeWidth)-1;
7458 /* Level0 Tnodes are 16 bits or wider (if wide tnodes are enabled),
7459 * so if the bitwidth of the
7460 * chunk range we're using is greater than 16 we need
7461 * to figure out chunk shift and chunkGroupSize
7464 if (bits <= dev->tnodeWidth)
7465 dev->chunkGroupBits = 0;
7467 dev->chunkGroupBits = bits - dev->tnodeWidth;
7470 dev->chunkGroupSize = 1 << dev->chunkGroupBits;
7472 if (dev->nChunksPerBlock < dev->chunkGroupSize) {
7473 /* We have a problem because the soft delete won't work if
7474 * the chunk group size > chunks per block.
7475 * This can be remedied by using larger "virtual blocks".
7477 T(YAFFS_TRACE_ALWAYS,
7478 (TSTR("yaffs: chunk group too large\n" TENDSTR)));
7483 /* OK, we've finished verifying the device, lets continue with initialisation */
7485 /* More device initialisation */
7486 dev->garbageCollections = 0;
7487 dev->passiveGarbageCollections = 0;
7488 dev->currentDirtyChecker = 0;
7489 dev->bufferedBlock = -1;
7490 dev->doingBufferedBlockRewrite = 0;
7491 dev->nDeletedFiles = 0;
7492 dev->nBackgroundDeletions = 0;
7493 dev->nUnlinkedFiles = 0;
7495 dev->eccUnfixed = 0;
7496 dev->tagsEccFixed = 0;
7497 dev->tagsEccUnfixed = 0;
7498 dev->nErasureFailures = 0;
7499 dev->nErasedBlocks = 0;
7501 dev->hasPendingPrioritisedGCs = 1; /* Assume the worst for now, will get fixed on first GC */
7503 /* Initialise temporary buffers and caches. */
7504 if (!yaffs_InitialiseTempBuffers(dev))
7507 dev->srCache = NULL;
7508 dev->gcCleanupList = NULL;
7512 dev->nShortOpCaches > 0) {
7515 int srCacheBytes = dev->nShortOpCaches * sizeof(yaffs_ChunkCache);
7517 if (dev->nShortOpCaches > YAFFS_MAX_SHORT_OP_CACHES)
7518 dev->nShortOpCaches = YAFFS_MAX_SHORT_OP_CACHES;
7520 dev->srCache = YMALLOC(srCacheBytes);
7522 buf = (__u8 *) dev->srCache;
7525 memset(dev->srCache, 0, srCacheBytes);
7527 for (i = 0; i < dev->nShortOpCaches && buf; i++) {
7528 dev->srCache[i].object = NULL;
7529 dev->srCache[i].lastUse = 0;
7530 dev->srCache[i].dirty = 0;
7531 dev->srCache[i].data = buf = YMALLOC_DMA(dev->totalBytesPerChunk);
7542 dev->gcCleanupList = YMALLOC(dev->nChunksPerBlock * sizeof(__u32));
7543 if (!dev->gcCleanupList)
7548 dev->useHeaderFileSize = 1;
7550 if (!init_failed && !yaffs_InitialiseBlocks(dev))
7553 yaffs_InitialiseTnodes(dev);
7554 yaffs_InitialiseObjects(dev);
7556 if (!init_failed && !yaffs_CreateInitialDirectories(dev))
7561 /* Now scan the flash. */
7562 if (dev->isYaffs2) {
7563 if (yaffs_CheckpointRestore(dev)) {
7564 yaffs_CheckObjectDetailsLoaded(dev->rootDir);
7565 T(YAFFS_TRACE_ALWAYS,
7566 (TSTR("yaffs: restored from checkpoint" TENDSTR)));
7569 /* Clean up the mess caused by an aborted checkpoint load
7570 * and scan backwards.
7572 yaffs_DeinitialiseBlocks(dev);
7573 yaffs_DeinitialiseTnodes(dev);
7574 yaffs_DeinitialiseObjects(dev);
7577 dev->nErasedBlocks = 0;
7578 dev->nFreeChunks = 0;
7579 dev->allocationBlock = -1;
7580 dev->allocationPage = -1;
7581 dev->nDeletedFiles = 0;
7582 dev->nUnlinkedFiles = 0;
7583 dev->nBackgroundDeletions = 0;
7584 dev->oldestDirtySequence = 0;
7586 if (!init_failed && !yaffs_InitialiseBlocks(dev))
7589 yaffs_InitialiseTnodes(dev);
7590 yaffs_InitialiseObjects(dev);
7592 if (!init_failed && !yaffs_CreateInitialDirectories(dev))
7595 if (!init_failed && !yaffs_ScanBackwards(dev))
7598 } else if (!yaffs_Scan(dev))
7601 yaffs_StripDeletedObjects(dev);
7602 yaffs_FixHangingObjects(dev);
7603 if(dev->emptyLostAndFound)
7604 yaffs_EmptyLostAndFound(dev);
7608 /* Clean up the mess */
7609 T(YAFFS_TRACE_TRACING,
7610 (TSTR("yaffs: yaffs_GutsInitialise() aborted.\n" TENDSTR)));
7612 yaffs_Deinitialise(dev);
7616 /* Zero out stats */
7617 dev->nPageReads = 0;
7618 dev->nPageWrites = 0;
7619 dev->nBlockErasures = 0;
7621 dev->nRetriedWrites = 0;
7623 dev->nRetiredBlocks = 0;
7625 yaffs_VerifyFreeChunks(dev);
7626 yaffs_VerifyBlocks(dev);
7628 /* Clean up any aborted checkpoint data */
7629 if(!dev->isCheckpointed && dev->blocksInCheckpoint > 0)
7630 yaffs_InvalidateCheckpoint(dev);
7632 T(YAFFS_TRACE_TRACING,
7633 (TSTR("yaffs: yaffs_GutsInitialise() done.\n" TENDSTR)));
7638 void yaffs_Deinitialise(yaffs_Device *dev)
7640 if (dev->isMounted) {
7643 yaffs_DeinitialiseBlocks(dev);
7644 yaffs_DeinitialiseTnodes(dev);
7645 yaffs_DeinitialiseObjects(dev);
7646 if (dev->nShortOpCaches > 0 &&
7649 for (i = 0; i < dev->nShortOpCaches; i++) {
7650 if (dev->srCache[i].data)
7651 YFREE(dev->srCache[i].data);
7652 dev->srCache[i].data = NULL;
7655 YFREE(dev->srCache);
7656 dev->srCache = NULL;
7659 YFREE(dev->gcCleanupList);
7661 for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++)
7662 YFREE(dev->tempBuffer[i].buffer);
7666 if (dev->deinitialiseNAND)
7667 dev->deinitialiseNAND(dev);
7671 static int yaffs_CountFreeChunks(yaffs_Device *dev)
7676 yaffs_BlockInfo *blk;
7678 for (nFree = 0, b = dev->internalStartBlock; b <= dev->internalEndBlock;
7680 blk = yaffs_GetBlockInfo(dev, b);
7682 switch (blk->blockState) {
7683 case YAFFS_BLOCK_STATE_EMPTY:
7684 case YAFFS_BLOCK_STATE_ALLOCATING:
7685 case YAFFS_BLOCK_STATE_COLLECTING:
7686 case YAFFS_BLOCK_STATE_FULL:
7688 (dev->nChunksPerBlock - blk->pagesInUse +
7689 blk->softDeletions);
7699 int yaffs_GetNumberOfFreeChunks(yaffs_Device *dev)
7701 /* This is what we report to the outside world */
7704 int nDirtyCacheChunks;
7705 int blocksForCheckpoint;
7709 nFree = dev->nFreeChunks;
7711 nFree = yaffs_CountFreeChunks(dev);
7714 nFree += dev->nDeletedFiles;
7716 /* Now count the number of dirty chunks in the cache and subtract those */
7718 for (nDirtyCacheChunks = 0, i = 0; i < dev->nShortOpCaches; i++) {
7719 if (dev->srCache[i].dirty)
7720 nDirtyCacheChunks++;
7723 nFree -= nDirtyCacheChunks;
7725 nFree -= ((dev->nReservedBlocks + 1) * dev->nChunksPerBlock);
7727 /* Now we figure out how much to reserve for the checkpoint and report that... */
7728 blocksForCheckpoint = yaffs_CalcCheckpointBlocksRequired(dev) - dev->blocksInCheckpoint;
7729 if (blocksForCheckpoint < 0)
7730 blocksForCheckpoint = 0;
7732 nFree -= (blocksForCheckpoint * dev->nChunksPerBlock);
7741 static int yaffs_freeVerificationFailures;
7743 static void yaffs_VerifyFreeChunks(yaffs_Device *dev)
7748 if (yaffs_SkipVerification(dev))
7751 counted = yaffs_CountFreeChunks(dev);
7753 difference = dev->nFreeChunks - counted;
7756 T(YAFFS_TRACE_ALWAYS,
7757 (TSTR("Freechunks verification failure %d %d %d" TENDSTR),
7758 dev->nFreeChunks, counted, difference));
7759 yaffs_freeVerificationFailures++;
7763 /*---------------------------------------- YAFFS test code ----------------------*/
7765 #define yaffs_CheckStruct(structure, syze, name) \
7767 if (sizeof(structure) != syze) { \
7768 T(YAFFS_TRACE_ALWAYS, (TSTR("%s should be %d but is %d\n" TENDSTR),\
7769 name, syze, sizeof(structure))); \
7770 return YAFFS_FAIL; \
7774 static int yaffs_CheckStructures(void)
7776 /* yaffs_CheckStruct(yaffs_Tags,8,"yaffs_Tags"); */
7777 /* yaffs_CheckStruct(yaffs_TagsUnion,8,"yaffs_TagsUnion"); */
7778 /* yaffs_CheckStruct(yaffs_Spare,16,"yaffs_Spare"); */
7779 #ifndef CONFIG_YAFFS_TNODE_LIST_DEBUG
7780 yaffs_CheckStruct(yaffs_Tnode, 2 * YAFFS_NTNODES_LEVEL0, "yaffs_Tnode");
7782 #ifndef CONFIG_YAFFS_WINCE
7783 yaffs_CheckStruct(yaffs_ObjectHeader, 512, "yaffs_ObjectHeader");