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 1.93 2009-11-07 02:06:58 charles Exp $";
19 #include "yaffsinterface.h"
20 #include "yaffs_guts.h"
21 #include "yaffs_tagsvalidity.h"
22 #include "yaffs_getblockinfo.h"
24 #include "yaffs_tagscompat.h"
25 #ifndef CONFIG_YAFFS_USE_OWN_SORT
26 #include "yaffs_qsort.h"
28 #include "yaffs_nand.h"
30 #include "yaffs_checkptrw.h"
32 #include "yaffs_nand.h"
33 #include "yaffs_packedtags2.h"
36 #define YAFFS_PASSIVE_GC_CHUNKS 2
38 #include "yaffs_ecc.h"
41 /* Robustification (if it ever comes about...) */
42 static void yaffs_RetireBlock(yaffs_Device *dev, int blockInNAND);
43 static void yaffs_HandleWriteChunkError(yaffs_Device *dev, int chunkInNAND,
45 static void yaffs_HandleWriteChunkOk(yaffs_Device *dev, int chunkInNAND,
47 const yaffs_ExtendedTags *tags);
48 static void yaffs_HandleUpdateChunk(yaffs_Device *dev, int chunkInNAND,
49 const yaffs_ExtendedTags *tags);
51 /* Other local prototypes */
52 static void yaffs_UpdateParent(yaffs_Object *obj);
53 static int yaffs_UnlinkObject(yaffs_Object *obj);
54 static int yaffs_ObjectHasCachedWriteData(yaffs_Object *obj);
56 static void yaffs_HardlinkFixup(yaffs_Device *dev, yaffs_Object *hardList);
58 static int yaffs_WriteNewChunkWithTagsToNAND(yaffs_Device *dev,
60 yaffs_ExtendedTags *tags,
62 static int yaffs_PutChunkIntoFile(yaffs_Object *in, int chunkInInode,
63 int chunkInNAND, int inScan);
65 static yaffs_Object *yaffs_CreateNewObject(yaffs_Device *dev, int number,
66 yaffs_ObjectType type);
67 static void yaffs_AddObjectToDirectory(yaffs_Object *directory,
69 static int yaffs_UpdateObjectHeader(yaffs_Object *in, const YCHAR *name,
70 int force, int isShrink, int shadows);
71 static void yaffs_RemoveObjectFromDirectory(yaffs_Object *obj);
72 static int yaffs_CheckStructures(void);
73 static int yaffs_DeleteWorker(yaffs_Object *in, yaffs_Tnode *tn, __u32 level,
74 int chunkOffset, int *limit);
75 static int yaffs_DoGenericObjectDeletion(yaffs_Object *in);
77 static yaffs_BlockInfo *yaffs_GetBlockInfo(yaffs_Device *dev, int blockNo);
80 static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,
83 static int yaffs_UnlinkWorker(yaffs_Object *obj);
85 static int yaffs_TagsMatch(const yaffs_ExtendedTags *tags, int objectId,
88 static int yaffs_AllocateChunk(yaffs_Device *dev, int useReserve,
89 yaffs_BlockInfo **blockUsedPtr);
91 static void yaffs_VerifyFreeChunks(yaffs_Device *dev);
93 static void yaffs_CheckObjectDetailsLoaded(yaffs_Object *in);
95 static void yaffs_VerifyDirectory(yaffs_Object *directory);
97 static int yaffs_CheckFileSanity(yaffs_Object *in);
99 #define yaffs_CheckFileSanity(in)
102 static void yaffs_InvalidateWholeChunkCache(yaffs_Object *in);
103 static void yaffs_InvalidateChunkCache(yaffs_Object *object, int chunkId);
105 static void yaffs_InvalidateCheckpoint(yaffs_Device *dev);
107 static int yaffs_FindChunkInFile(yaffs_Object *in, int chunkInInode,
108 yaffs_ExtendedTags *tags);
110 static __u32 yaffs_GetChunkGroupBase(yaffs_Device *dev, yaffs_Tnode *tn,
112 static yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device *dev,
113 yaffs_FileStructure *fStruct,
116 /* Function to calculate chunk and offset */
118 static void yaffs_AddrToChunk(yaffs_Device *dev, loff_t addr, int *chunkOut,
124 chunk = (__u32)(addr >> dev->chunkShift);
126 if (dev->chunkDiv == 1) {
127 /* easy power of 2 case */
128 offset = (__u32)(addr & dev->chunkMask);
130 /* Non power-of-2 case */
134 chunk /= dev->chunkDiv;
136 chunkBase = ((loff_t)chunk) * dev->nDataBytesPerChunk;
137 offset = (__u32)(addr - chunkBase);
144 /* Function to return the number of shifts for a power of 2 greater than or
145 * equal to the given number
146 * Note we don't try to cater for all possible numbers and this does not have to
147 * be hellishly efficient.
150 static __u32 ShiftsGE(__u32 x)
155 nShifts = extraBits = 0;
170 /* Function to return the number of shifts to get a 1 in bit 0
173 static __u32 Shifts(__u32 x)
193 * Temporary buffer manipulations.
196 static int yaffs_InitialiseTempBuffers(yaffs_Device *dev)
199 __u8 *buf = (__u8 *)1;
201 memset(dev->tempBuffer, 0, sizeof(dev->tempBuffer));
203 for (i = 0; buf && i < YAFFS_N_TEMP_BUFFERS; i++) {
204 dev->tempBuffer[i].line = 0; /* not in use */
205 dev->tempBuffer[i].buffer = buf =
206 YMALLOC_DMA(dev->totalBytesPerChunk);
209 return buf ? YAFFS_OK : YAFFS_FAIL;
212 __u8 *yaffs_GetTempBuffer(yaffs_Device *dev, int lineNo)
217 if (dev->tempInUse > dev->maxTemp)
218 dev->maxTemp = dev->tempInUse;
220 for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) {
221 if (dev->tempBuffer[i].line == 0) {
222 dev->tempBuffer[i].line = lineNo;
223 if ((i + 1) > dev->maxTemp) {
224 dev->maxTemp = i + 1;
225 for (j = 0; j <= i; j++)
226 dev->tempBuffer[j].maxLine =
227 dev->tempBuffer[j].line;
230 return dev->tempBuffer[i].buffer;
234 T(YAFFS_TRACE_BUFFERS,
235 (TSTR("Out of temp buffers at line %d, other held by lines:"),
237 for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++)
238 T(YAFFS_TRACE_BUFFERS, (TSTR(" %d "), dev->tempBuffer[i].line));
240 T(YAFFS_TRACE_BUFFERS, (TSTR(" " TENDSTR)));
243 * If we got here then we have to allocate an unmanaged one
247 dev->unmanagedTempAllocations++;
248 return YMALLOC(dev->nDataBytesPerChunk);
252 void yaffs_ReleaseTempBuffer(yaffs_Device *dev, __u8 *buffer,
259 for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) {
260 if (dev->tempBuffer[i].buffer == buffer) {
261 dev->tempBuffer[i].line = 0;
267 /* assume it is an unmanaged one. */
268 T(YAFFS_TRACE_BUFFERS,
269 (TSTR("Releasing unmanaged temp buffer in line %d" TENDSTR),
272 dev->unmanagedTempDeallocations++;
278 * Determine if we have a managed buffer.
280 int yaffs_IsManagedTempBuffer(yaffs_Device *dev, const __u8 *buffer)
284 for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) {
285 if (dev->tempBuffer[i].buffer == buffer)
289 for (i = 0; i < dev->nShortOpCaches; i++) {
290 if (dev->srCache[i].data == buffer)
294 if (buffer == dev->checkpointBuffer)
297 T(YAFFS_TRACE_ALWAYS,
298 (TSTR("yaffs: unmaged buffer detected.\n" TENDSTR)));
305 * Chunk bitmap manipulations
308 static Y_INLINE __u8 *yaffs_BlockBits(yaffs_Device *dev, int blk)
310 if (blk < dev->internalStartBlock || blk > dev->internalEndBlock) {
312 (TSTR("**>> yaffs: BlockBits block %d is not valid" TENDSTR),
316 return dev->chunkBits +
317 (dev->chunkBitmapStride * (blk - dev->internalStartBlock));
320 static Y_INLINE void yaffs_VerifyChunkBitId(yaffs_Device *dev, int blk, int chunk)
322 if (blk < dev->internalStartBlock || blk > dev->internalEndBlock ||
323 chunk < 0 || chunk >= dev->nChunksPerBlock) {
325 (TSTR("**>> yaffs: Chunk Id (%d:%d) invalid"TENDSTR),
331 static Y_INLINE void yaffs_ClearChunkBits(yaffs_Device *dev, int blk)
333 __u8 *blkBits = yaffs_BlockBits(dev, blk);
335 memset(blkBits, 0, dev->chunkBitmapStride);
338 static Y_INLINE void yaffs_ClearChunkBit(yaffs_Device *dev, int blk, int chunk)
340 __u8 *blkBits = yaffs_BlockBits(dev, blk);
342 yaffs_VerifyChunkBitId(dev, blk, chunk);
344 blkBits[chunk / 8] &= ~(1 << (chunk & 7));
347 static Y_INLINE void yaffs_SetChunkBit(yaffs_Device *dev, int blk, int chunk)
349 __u8 *blkBits = yaffs_BlockBits(dev, blk);
351 yaffs_VerifyChunkBitId(dev, blk, chunk);
353 blkBits[chunk / 8] |= (1 << (chunk & 7));
356 static Y_INLINE int yaffs_CheckChunkBit(yaffs_Device *dev, int blk, int chunk)
358 __u8 *blkBits = yaffs_BlockBits(dev, blk);
359 yaffs_VerifyChunkBitId(dev, blk, chunk);
361 return (blkBits[chunk / 8] & (1 << (chunk & 7))) ? 1 : 0;
364 static Y_INLINE int yaffs_StillSomeChunkBits(yaffs_Device *dev, int blk)
366 __u8 *blkBits = yaffs_BlockBits(dev, blk);
368 for (i = 0; i < dev->chunkBitmapStride; i++) {
376 static int yaffs_CountChunkBits(yaffs_Device *dev, int blk)
378 __u8 *blkBits = yaffs_BlockBits(dev, blk);
381 for (i = 0; i < dev->chunkBitmapStride; i++) {
398 static int yaffs_SkipVerification(yaffs_Device *dev)
400 return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY | YAFFS_TRACE_VERIFY_FULL));
403 static int yaffs_SkipFullVerification(yaffs_Device *dev)
405 return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY_FULL));
408 static int yaffs_SkipNANDVerification(yaffs_Device *dev)
410 return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY_NAND));
413 static const char *blockStateName[] = {
426 static void yaffs_VerifyBlock(yaffs_Device *dev, yaffs_BlockInfo *bi, int n)
431 if (yaffs_SkipVerification(dev))
434 /* Report illegal runtime states */
435 if (bi->blockState >= YAFFS_NUMBER_OF_BLOCK_STATES)
436 T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has undefined state %d"TENDSTR), n, bi->blockState));
438 switch (bi->blockState) {
439 case YAFFS_BLOCK_STATE_UNKNOWN:
440 case YAFFS_BLOCK_STATE_SCANNING:
441 case YAFFS_BLOCK_STATE_NEEDS_SCANNING:
442 T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has bad run-state %s"TENDSTR),
443 n, blockStateName[bi->blockState]));
446 /* Check pages in use and soft deletions are legal */
448 actuallyUsed = bi->pagesInUse - bi->softDeletions;
450 if (bi->pagesInUse < 0 || bi->pagesInUse > dev->nChunksPerBlock ||
451 bi->softDeletions < 0 || bi->softDeletions > dev->nChunksPerBlock ||
452 actuallyUsed < 0 || actuallyUsed > dev->nChunksPerBlock)
453 T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has illegal values pagesInUsed %d softDeletions %d"TENDSTR),
454 n, bi->pagesInUse, bi->softDeletions));
457 /* Check chunk bitmap legal */
458 inUse = yaffs_CountChunkBits(dev, n);
459 if (inUse != bi->pagesInUse)
460 T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has inconsistent values pagesInUse %d counted chunk bits %d"TENDSTR),
461 n, bi->pagesInUse, inUse));
463 /* Check that the sequence number is valid.
464 * Ten million is legal, but is very unlikely
467 (bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING || bi->blockState == YAFFS_BLOCK_STATE_FULL) &&
468 (bi->sequenceNumber < YAFFS_LOWEST_SEQUENCE_NUMBER || bi->sequenceNumber > 10000000))
469 T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has suspect sequence number of %d"TENDSTR),
470 n, bi->sequenceNumber));
473 static void yaffs_VerifyCollectedBlock(yaffs_Device *dev, yaffs_BlockInfo *bi,
476 yaffs_VerifyBlock(dev, bi, n);
478 /* After collection the block should be in the erased state */
479 /* This will need to change if we do partial gc */
481 if (bi->blockState != YAFFS_BLOCK_STATE_COLLECTING &&
482 bi->blockState != YAFFS_BLOCK_STATE_EMPTY) {
483 T(YAFFS_TRACE_ERROR, (TSTR("Block %d is in state %d after gc, should be erased"TENDSTR),
488 static void yaffs_VerifyBlocks(yaffs_Device *dev)
491 int nBlocksPerState[YAFFS_NUMBER_OF_BLOCK_STATES];
492 int nIllegalBlockStates = 0;
494 if (yaffs_SkipVerification(dev))
497 memset(nBlocksPerState, 0, sizeof(nBlocksPerState));
499 for (i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) {
500 yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, i);
501 yaffs_VerifyBlock(dev, bi, i);
503 if (bi->blockState < YAFFS_NUMBER_OF_BLOCK_STATES)
504 nBlocksPerState[bi->blockState]++;
506 nIllegalBlockStates++;
509 T(YAFFS_TRACE_VERIFY, (TSTR(""TENDSTR)));
510 T(YAFFS_TRACE_VERIFY, (TSTR("Block summary"TENDSTR)));
512 T(YAFFS_TRACE_VERIFY, (TSTR("%d blocks have illegal states"TENDSTR), nIllegalBlockStates));
513 if (nBlocksPerState[YAFFS_BLOCK_STATE_ALLOCATING] > 1)
514 T(YAFFS_TRACE_VERIFY, (TSTR("Too many allocating blocks"TENDSTR)));
516 for (i = 0; i < YAFFS_NUMBER_OF_BLOCK_STATES; i++)
517 T(YAFFS_TRACE_VERIFY,
518 (TSTR("%s %d blocks"TENDSTR),
519 blockStateName[i], nBlocksPerState[i]));
521 if (dev->blocksInCheckpoint != nBlocksPerState[YAFFS_BLOCK_STATE_CHECKPOINT])
522 T(YAFFS_TRACE_VERIFY,
523 (TSTR("Checkpoint block count wrong dev %d count %d"TENDSTR),
524 dev->blocksInCheckpoint, nBlocksPerState[YAFFS_BLOCK_STATE_CHECKPOINT]));
526 if (dev->nErasedBlocks != nBlocksPerState[YAFFS_BLOCK_STATE_EMPTY])
527 T(YAFFS_TRACE_VERIFY,
528 (TSTR("Erased block count wrong dev %d count %d"TENDSTR),
529 dev->nErasedBlocks, nBlocksPerState[YAFFS_BLOCK_STATE_EMPTY]));
531 if (nBlocksPerState[YAFFS_BLOCK_STATE_COLLECTING] > 1)
532 T(YAFFS_TRACE_VERIFY,
533 (TSTR("Too many collecting blocks %d (max is 1)"TENDSTR),
534 nBlocksPerState[YAFFS_BLOCK_STATE_COLLECTING]));
536 T(YAFFS_TRACE_VERIFY, (TSTR(""TENDSTR)));
541 * Verify the object header. oh must be valid, but obj and tags may be NULL in which
542 * case those tests will not be performed.
544 static void yaffs_VerifyObjectHeader(yaffs_Object *obj, yaffs_ObjectHeader *oh, yaffs_ExtendedTags *tags, int parentCheck)
546 if (obj && yaffs_SkipVerification(obj->myDev))
549 if (!(tags && obj && oh)) {
550 T(YAFFS_TRACE_VERIFY,
551 (TSTR("Verifying object header tags %x obj %x oh %x"TENDSTR),
552 (__u32)tags, (__u32)obj, (__u32)oh));
556 if (oh->type <= YAFFS_OBJECT_TYPE_UNKNOWN ||
557 oh->type > YAFFS_OBJECT_TYPE_MAX)
558 T(YAFFS_TRACE_VERIFY,
559 (TSTR("Obj %d header type is illegal value 0x%x"TENDSTR),
560 tags->objectId, oh->type));
562 if (tags->objectId != obj->objectId)
563 T(YAFFS_TRACE_VERIFY,
564 (TSTR("Obj %d header mismatch objectId %d"TENDSTR),
565 tags->objectId, obj->objectId));
569 * Check that the object's parent ids match if parentCheck requested.
571 * Tests do not apply to the root object.
574 if (parentCheck && tags->objectId > 1 && !obj->parent)
575 T(YAFFS_TRACE_VERIFY,
576 (TSTR("Obj %d header mismatch parentId %d obj->parent is NULL"TENDSTR),
577 tags->objectId, oh->parentObjectId));
579 if (parentCheck && obj->parent &&
580 oh->parentObjectId != obj->parent->objectId &&
581 (oh->parentObjectId != YAFFS_OBJECTID_UNLINKED ||
582 obj->parent->objectId != YAFFS_OBJECTID_DELETED))
583 T(YAFFS_TRACE_VERIFY,
584 (TSTR("Obj %d header mismatch parentId %d parentObjectId %d"TENDSTR),
585 tags->objectId, oh->parentObjectId, obj->parent->objectId));
587 if (tags->objectId > 1 && oh->name[0] == 0) /* Null name */
588 T(YAFFS_TRACE_VERIFY,
589 (TSTR("Obj %d header name is NULL"TENDSTR),
592 if (tags->objectId > 1 && ((__u8)(oh->name[0])) == 0xff) /* Trashed name */
593 T(YAFFS_TRACE_VERIFY,
594 (TSTR("Obj %d header name is 0xFF"TENDSTR),
600 static int yaffs_VerifyTnodeWorker(yaffs_Object *obj, yaffs_Tnode *tn,
601 __u32 level, int chunkOffset)
604 yaffs_Device *dev = obj->myDev;
610 for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++) {
611 if (tn->internal[i]) {
612 ok = yaffs_VerifyTnodeWorker(obj,
615 (chunkOffset<<YAFFS_TNODES_INTERNAL_BITS) + i);
618 } else if (level == 0) {
619 yaffs_ExtendedTags tags;
620 __u32 objectId = obj->objectId;
622 chunkOffset <<= YAFFS_TNODES_LEVEL0_BITS;
624 for (i = 0; i < YAFFS_NTNODES_LEVEL0; i++) {
625 __u32 theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
628 /* T(~0,(TSTR("verifying (%d:%d) %d"TENDSTR),tags.objectId,tags.chunkId,theChunk)); */
629 yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL, &tags);
630 if (tags.objectId != objectId || tags.chunkId != chunkOffset) {
631 T(~0, (TSTR("Object %d chunkId %d NAND mismatch chunk %d tags (%d:%d)"TENDSTR),
632 objectId, chunkOffset, theChunk,
633 tags.objectId, tags.chunkId));
646 static void yaffs_VerifyFile(yaffs_Object *obj)
648 int requiredTallness;
654 yaffs_ExtendedTags tags;
661 if (yaffs_SkipVerification(obj->myDev))
665 objectId = obj->objectId;
667 /* Check file size is consistent with tnode depth */
668 lastChunk = obj->variant.fileVariant.fileSize / dev->nDataBytesPerChunk + 1;
669 x = lastChunk >> YAFFS_TNODES_LEVEL0_BITS;
670 requiredTallness = 0;
672 x >>= YAFFS_TNODES_INTERNAL_BITS;
676 actualTallness = obj->variant.fileVariant.topLevel;
678 if (requiredTallness > actualTallness)
679 T(YAFFS_TRACE_VERIFY,
680 (TSTR("Obj %d had tnode tallness %d, needs to be %d"TENDSTR),
681 obj->objectId, actualTallness, requiredTallness));
684 /* Check that the chunks in the tnode tree are all correct.
685 * We do this by scanning through the tnode tree and
686 * checking the tags for every chunk match.
689 if (yaffs_SkipNANDVerification(dev))
692 for (i = 1; i <= lastChunk; i++) {
693 tn = yaffs_FindLevel0Tnode(dev, &obj->variant.fileVariant, i);
696 __u32 theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
698 /* T(~0,(TSTR("verifying (%d:%d) %d"TENDSTR),objectId,i,theChunk)); */
699 yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL, &tags);
700 if (tags.objectId != objectId || tags.chunkId != i) {
701 T(~0, (TSTR("Object %d chunkId %d NAND mismatch chunk %d tags (%d:%d)"TENDSTR),
702 objectId, i, theChunk,
703 tags.objectId, tags.chunkId));
711 static void yaffs_VerifyHardLink(yaffs_Object *obj)
713 if (obj && yaffs_SkipVerification(obj->myDev))
716 /* Verify sane equivalent object */
719 static void yaffs_VerifySymlink(yaffs_Object *obj)
721 if (obj && yaffs_SkipVerification(obj->myDev))
724 /* Verify symlink string */
727 static void yaffs_VerifySpecial(yaffs_Object *obj)
729 if (obj && yaffs_SkipVerification(obj->myDev))
733 static void yaffs_VerifyObject(yaffs_Object *obj)
742 __u32 chunkShouldNotBeDeleted;
748 if (obj->beingCreated)
753 if (yaffs_SkipVerification(dev))
756 /* Check sane object header chunk */
758 chunkMin = dev->internalStartBlock * dev->nChunksPerBlock;
759 chunkMax = (dev->internalEndBlock+1) * dev->nChunksPerBlock - 1;
761 chunkInRange = (((unsigned)(obj->hdrChunk)) >= chunkMin && ((unsigned)(obj->hdrChunk)) <= chunkMax);
762 chunkIdOk = chunkInRange || (obj->hdrChunk == 0);
763 chunkValid = chunkInRange &&
764 yaffs_CheckChunkBit(dev,
765 obj->hdrChunk / dev->nChunksPerBlock,
766 obj->hdrChunk % dev->nChunksPerBlock);
767 chunkShouldNotBeDeleted = chunkInRange && !chunkValid;
770 (!chunkIdOk || chunkShouldNotBeDeleted)) {
771 T(YAFFS_TRACE_VERIFY,
772 (TSTR("Obj %d has chunkId %d %s %s"TENDSTR),
773 obj->objectId, obj->hdrChunk,
774 chunkIdOk ? "" : ",out of range",
775 chunkShouldNotBeDeleted ? ",marked as deleted" : ""));
778 if (chunkValid && !yaffs_SkipNANDVerification(dev)) {
779 yaffs_ExtendedTags tags;
780 yaffs_ObjectHeader *oh;
781 __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__);
783 oh = (yaffs_ObjectHeader *)buffer;
785 yaffs_ReadChunkWithTagsFromNAND(dev, obj->hdrChunk, buffer,
788 yaffs_VerifyObjectHeader(obj, oh, &tags, 1);
790 yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
793 /* Verify it has a parent */
794 if (obj && !obj->fake &&
795 (!obj->parent || obj->parent->myDev != dev)) {
796 T(YAFFS_TRACE_VERIFY,
797 (TSTR("Obj %d has parent pointer %p which does not look like an object"TENDSTR),
798 obj->objectId, obj->parent));
801 /* Verify parent is a directory */
802 if (obj->parent && obj->parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
803 T(YAFFS_TRACE_VERIFY,
804 (TSTR("Obj %d's parent is not a directory (type %d)"TENDSTR),
805 obj->objectId, obj->parent->variantType));
808 switch (obj->variantType) {
809 case YAFFS_OBJECT_TYPE_FILE:
810 yaffs_VerifyFile(obj);
812 case YAFFS_OBJECT_TYPE_SYMLINK:
813 yaffs_VerifySymlink(obj);
815 case YAFFS_OBJECT_TYPE_DIRECTORY:
816 yaffs_VerifyDirectory(obj);
818 case YAFFS_OBJECT_TYPE_HARDLINK:
819 yaffs_VerifyHardLink(obj);
821 case YAFFS_OBJECT_TYPE_SPECIAL:
822 yaffs_VerifySpecial(obj);
824 case YAFFS_OBJECT_TYPE_UNKNOWN:
826 T(YAFFS_TRACE_VERIFY,
827 (TSTR("Obj %d has illegaltype %d"TENDSTR),
828 obj->objectId, obj->variantType));
833 static void yaffs_VerifyObjects(yaffs_Device *dev)
837 struct ylist_head *lh;
839 if (yaffs_SkipVerification(dev))
842 /* Iterate through the objects in each hash entry */
844 for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
845 ylist_for_each(lh, &dev->objectBucket[i].list) {
847 obj = ylist_entry(lh, yaffs_Object, hashLink);
848 yaffs_VerifyObject(obj);
856 * Simple hash function. Needs to have a reasonable spread
859 static Y_INLINE int yaffs_HashFunction(int n)
862 return n % YAFFS_NOBJECT_BUCKETS;
866 * Access functions to useful fake objects.
867 * Note that root might have a presence in NAND if permissions are set.
870 yaffs_Object *yaffs_Root(yaffs_Device *dev)
875 yaffs_Object *yaffs_LostNFound(yaffs_Device *dev)
877 return dev->lostNFoundDir;
882 * Erased NAND checking functions
885 int yaffs_CheckFF(__u8 *buffer, int nBytes)
887 /* Horrible, slow implementation */
896 static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,
899 int retval = YAFFS_OK;
900 __u8 *data = yaffs_GetTempBuffer(dev, __LINE__);
901 yaffs_ExtendedTags tags;
904 result = yaffs_ReadChunkWithTagsFromNAND(dev, chunkInNAND, data, &tags);
906 if (tags.eccResult > YAFFS_ECC_RESULT_NO_ERROR)
909 if (!yaffs_CheckFF(data, dev->nDataBytesPerChunk) || tags.chunkUsed) {
910 T(YAFFS_TRACE_NANDACCESS,
911 (TSTR("Chunk %d not erased" TENDSTR), chunkInNAND));
915 yaffs_ReleaseTempBuffer(dev, data, __LINE__);
921 static int yaffs_WriteNewChunkWithTagsToNAND(struct yaffs_DeviceStruct *dev,
923 yaffs_ExtendedTags *tags,
930 yaffs_InvalidateCheckpoint(dev);
933 yaffs_BlockInfo *bi = 0;
936 chunk = yaffs_AllocateChunk(dev, useReserve, &bi);
942 /* First check this chunk is erased, if it needs
943 * checking. The checking policy (unless forced
944 * always on) is as follows:
946 * Check the first page we try to write in a block.
947 * If the check passes then we don't need to check any
948 * more. If the check fails, we check again...
949 * If the block has been erased, we don't need to check.
951 * However, if the block has been prioritised for gc,
952 * then we think there might be something odd about
953 * this block and stop using it.
955 * Rationale: We should only ever see chunks that have
956 * not been erased if there was a partially written
957 * chunk due to power loss. This checking policy should
958 * catch that case with very few checks and thus save a
959 * lot of checks that are most likely not needed.
961 if (bi->gcPrioritise) {
962 yaffs_DeleteChunk(dev, chunk, 1, __LINE__);
963 /* try another chunk */
967 /* let's give it a try */
970 #ifdef CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED
971 bi->skipErasedCheck = 0;
973 if (!bi->skipErasedCheck) {
974 erasedOk = yaffs_CheckChunkErased(dev, chunk);
975 if (erasedOk != YAFFS_OK) {
977 (TSTR("**>> yaffs chunk %d was not erased"
980 /* try another chunk */
983 bi->skipErasedCheck = 1;
986 writeOk = yaffs_WriteChunkWithTagsToNAND(dev, chunk,
988 if (writeOk != YAFFS_OK) {
989 yaffs_HandleWriteChunkError(dev, chunk, erasedOk);
990 /* try another chunk */
994 /* Copy the data into the robustification buffer */
995 yaffs_HandleWriteChunkOk(dev, chunk, data, tags);
997 } while (writeOk != YAFFS_OK &&
998 (yaffs_wr_attempts <= 0 || attempts <= yaffs_wr_attempts));
1004 T(YAFFS_TRACE_ERROR,
1005 (TSTR("**>> yaffs write required %d attempts" TENDSTR),
1008 dev->nRetriedWrites += (attempts - 1);
1015 * Block retiring for handling a broken block.
1018 static void yaffs_RetireBlock(yaffs_Device *dev, int blockInNAND)
1020 yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND);
1022 yaffs_InvalidateCheckpoint(dev);
1024 if (yaffs_MarkBlockBad(dev, blockInNAND) != YAFFS_OK) {
1025 if (yaffs_EraseBlockInNAND(dev, blockInNAND) != YAFFS_OK) {
1026 T(YAFFS_TRACE_ALWAYS, (TSTR(
1027 "yaffs: Failed to mark bad and erase block %d"
1028 TENDSTR), blockInNAND));
1030 yaffs_ExtendedTags tags;
1031 int chunkId = blockInNAND * dev->nChunksPerBlock;
1033 __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__);
1035 memset(buffer, 0xff, dev->nDataBytesPerChunk);
1036 yaffs_InitialiseTags(&tags);
1037 tags.sequenceNumber = YAFFS_SEQUENCE_BAD_BLOCK;
1038 if (dev->writeChunkWithTagsToNAND(dev, chunkId -
1039 dev->chunkOffset, buffer, &tags) != YAFFS_OK)
1040 T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Failed to "
1041 TCONT("write bad block marker to block %d")
1042 TENDSTR), blockInNAND));
1044 yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
1048 bi->blockState = YAFFS_BLOCK_STATE_DEAD;
1049 bi->gcPrioritise = 0;
1050 bi->needsRetiring = 0;
1052 dev->nRetiredBlocks++;
1056 * Functions for robustisizing TODO
1060 static void yaffs_HandleWriteChunkOk(yaffs_Device *dev, int chunkInNAND,
1062 const yaffs_ExtendedTags *tags)
1066 static void yaffs_HandleUpdateChunk(yaffs_Device *dev, int chunkInNAND,
1067 const yaffs_ExtendedTags *tags)
1071 void yaffs_HandleChunkError(yaffs_Device *dev, yaffs_BlockInfo *bi)
1073 if (!bi->gcPrioritise) {
1074 bi->gcPrioritise = 1;
1075 dev->hasPendingPrioritisedGCs = 1;
1076 bi->chunkErrorStrikes++;
1078 if (bi->chunkErrorStrikes > 3) {
1079 bi->needsRetiring = 1; /* Too many stikes, so retire this */
1080 T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Block struck out" TENDSTR)));
1086 static void yaffs_HandleWriteChunkError(yaffs_Device *dev, int chunkInNAND,
1089 int blockInNAND = chunkInNAND / dev->nChunksPerBlock;
1090 yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND);
1092 yaffs_HandleChunkError(dev, bi);
1095 /* Was an actual write failure, so mark the block for retirement */
1096 bi->needsRetiring = 1;
1097 T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
1098 (TSTR("**>> Block %d needs retiring" TENDSTR), blockInNAND));
1101 /* Delete the chunk */
1102 yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__);
1106 /*---------------- Name handling functions ------------*/
1108 static __u16 yaffs_CalcNameSum(const YCHAR *name)
1113 const YUCHAR *bname = (const YUCHAR *) name;
1115 while ((*bname) && (i < (YAFFS_MAX_NAME_LENGTH/2))) {
1117 #ifdef CONFIG_YAFFS_CASE_INSENSITIVE
1118 sum += yaffs_toupper(*bname) * i;
1120 sum += (*bname) * i;
1129 static void yaffs_SetObjectName(yaffs_Object *obj, const YCHAR *name)
1131 #ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM
1132 memset(obj->shortName, 0, sizeof(YCHAR) * (YAFFS_SHORT_NAME_LENGTH+1));
1133 if (name && yaffs_strlen(name) <= YAFFS_SHORT_NAME_LENGTH)
1134 yaffs_strcpy(obj->shortName, name);
1136 obj->shortName[0] = _Y('\0');
1138 obj->sum = yaffs_CalcNameSum(name);
1141 /*-------------------- TNODES -------------------
1143 * List of spare tnodes
1144 * The list is hooked together using the first pointer
1148 /* yaffs_CreateTnodes creates a bunch more tnodes and
1149 * adds them to the tnode free list.
1150 * Don't use this function directly
1153 static int yaffs_CreateTnodes(yaffs_Device *dev, int nTnodes)
1157 yaffs_Tnode *newTnodes;
1161 yaffs_TnodeList *tnl;
1166 /* Calculate the tnode size in bytes for variable width tnode support.
1167 * Must be a multiple of 32-bits */
1168 tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
1170 if (tnodeSize < sizeof(yaffs_Tnode))
1171 tnodeSize = sizeof(yaffs_Tnode);
1173 /* make these things */
1175 newTnodes = YMALLOC(nTnodes * tnodeSize);
1176 mem = (__u8 *)newTnodes;
1179 T(YAFFS_TRACE_ERROR,
1180 (TSTR("yaffs: Could not allocate Tnodes" TENDSTR)));
1184 /* Hook them into the free list */
1186 for (i = 0; i < nTnodes - 1; i++) {
1187 newTnodes[i].internal[0] = &newTnodes[i + 1];
1188 #ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
1189 newTnodes[i].internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
1193 newTnodes[nTnodes - 1].internal[0] = dev->freeTnodes;
1194 #ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
1195 newTnodes[nTnodes - 1].internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
1197 dev->freeTnodes = newTnodes;
1199 /* New hookup for wide tnodes */
1200 for (i = 0; i < nTnodes - 1; i++) {
1201 curr = (yaffs_Tnode *) &mem[i * tnodeSize];
1202 next = (yaffs_Tnode *) &mem[(i+1) * tnodeSize];
1203 curr->internal[0] = next;
1206 curr = (yaffs_Tnode *) &mem[(nTnodes - 1) * tnodeSize];
1207 curr->internal[0] = dev->freeTnodes;
1208 dev->freeTnodes = (yaffs_Tnode *)mem;
1213 dev->nFreeTnodes += nTnodes;
1214 dev->nTnodesCreated += nTnodes;
1216 /* Now add this bunch of tnodes to a list for freeing up.
1217 * NB If we can't add this to the management list it isn't fatal
1218 * but it just means we can't free this bunch of tnodes later.
1221 tnl = YMALLOC(sizeof(yaffs_TnodeList));
1223 T(YAFFS_TRACE_ERROR,
1225 ("yaffs: Could not add tnodes to management list" TENDSTR)));
1228 tnl->tnodes = newTnodes;
1229 tnl->next = dev->allocatedTnodeList;
1230 dev->allocatedTnodeList = tnl;
1233 T(YAFFS_TRACE_ALLOCATE, (TSTR("yaffs: Tnodes added" TENDSTR)));
1238 /* GetTnode gets us a clean tnode. Tries to make allocate more if we run out */
1240 static yaffs_Tnode *yaffs_GetTnodeRaw(yaffs_Device *dev)
1242 yaffs_Tnode *tn = NULL;
1244 /* If there are none left make more */
1245 if (!dev->freeTnodes)
1246 yaffs_CreateTnodes(dev, YAFFS_ALLOCATION_NTNODES);
1248 if (dev->freeTnodes) {
1249 tn = dev->freeTnodes;
1250 #ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
1251 if (tn->internal[YAFFS_NTNODES_INTERNAL] != (void *)1) {
1252 /* Hoosterman, this thing looks like it isn't in the list */
1253 T(YAFFS_TRACE_ALWAYS,
1254 (TSTR("yaffs: Tnode list bug 1" TENDSTR)));
1257 dev->freeTnodes = dev->freeTnodes->internal[0];
1261 dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
1266 static yaffs_Tnode *yaffs_GetTnode(yaffs_Device *dev)
1268 yaffs_Tnode *tn = yaffs_GetTnodeRaw(dev);
1269 int tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
1271 if (tnodeSize < sizeof(yaffs_Tnode))
1272 tnodeSize = sizeof(yaffs_Tnode);
1275 memset(tn, 0, tnodeSize);
1280 /* FreeTnode frees up a tnode and puts it back on the free list */
1281 static void yaffs_FreeTnode(yaffs_Device *dev, yaffs_Tnode *tn)
1284 #ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
1285 if (tn->internal[YAFFS_NTNODES_INTERNAL] != 0) {
1286 /* Hoosterman, this thing looks like it is already in the list */
1287 T(YAFFS_TRACE_ALWAYS,
1288 (TSTR("yaffs: Tnode list bug 2" TENDSTR)));
1290 tn->internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
1292 tn->internal[0] = dev->freeTnodes;
1293 dev->freeTnodes = tn;
1296 dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
1299 static void yaffs_DeinitialiseTnodes(yaffs_Device *dev)
1301 /* Free the list of allocated tnodes */
1302 yaffs_TnodeList *tmp;
1304 while (dev->allocatedTnodeList) {
1305 tmp = dev->allocatedTnodeList->next;
1307 YFREE(dev->allocatedTnodeList->tnodes);
1308 YFREE(dev->allocatedTnodeList);
1309 dev->allocatedTnodeList = tmp;
1313 dev->freeTnodes = NULL;
1314 dev->nFreeTnodes = 0;
1317 static void yaffs_InitialiseTnodes(yaffs_Device *dev)
1319 dev->allocatedTnodeList = NULL;
1320 dev->freeTnodes = NULL;
1321 dev->nFreeTnodes = 0;
1322 dev->nTnodesCreated = 0;
1326 void yaffs_PutLevel0Tnode(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;
1485 T(YAFFS_TRACE_ERROR,
1486 (TSTR("yaffs: no more tnodes" TENDSTR)));
1490 fStruct->topLevel = requiredTallness;
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);
1510 } else if (l == 1) {
1511 /* Looking from level 1 at level 0 */
1513 /* If we already have one, then release it.*/
1514 if (tn->internal[x])
1515 yaffs_FreeTnode(dev, tn->internal[x]);
1516 tn->internal[x] = passedTn;
1518 } else if (!tn->internal[x]) {
1519 /* Don't have one, none passed in */
1520 tn->internal[x] = yaffs_GetTnode(dev);
1524 tn = tn->internal[x];
1528 /* top is level 0 */
1530 memcpy(tn, passedTn, (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8);
1531 yaffs_FreeTnode(dev, passedTn);
1538 static int yaffs_FindChunkInGroup(yaffs_Device *dev, int theChunk,
1539 yaffs_ExtendedTags *tags, int objectId,
1544 for (j = 0; theChunk && j < dev->chunkGroupSize; j++) {
1545 if (yaffs_CheckChunkBit(dev, theChunk / dev->nChunksPerBlock,
1546 theChunk % dev->nChunksPerBlock)) {
1548 if(dev->chunkGroupSize == 1)
1551 yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL,
1553 if (yaffs_TagsMatch(tags, objectId, chunkInInode)) {
1565 /* DeleteWorker scans backwards through the tnode tree and deletes all the
1566 * chunks and tnodes in the file
1567 * Returns 1 if the tree was deleted.
1568 * Returns 0 if it stopped early due to hitting the limit and the delete is incomplete.
1571 static int yaffs_DeleteWorker(yaffs_Object *in, yaffs_Tnode *tn, __u32 level,
1572 int chunkOffset, int *limit)
1577 yaffs_ExtendedTags tags;
1579 yaffs_Device *dev = in->myDev;
1585 for (i = YAFFS_NTNODES_INTERNAL - 1; allDone && i >= 0;
1587 if (tn->internal[i]) {
1588 if (limit && (*limit) < 0) {
1592 yaffs_DeleteWorker(in,
1600 YAFFS_TNODES_INTERNAL_BITS)
1605 yaffs_FreeTnode(dev,
1608 tn->internal[i] = NULL;
1612 return (allDone) ? 1 : 0;
1613 } else if (level == 0) {
1616 for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0 && !hitLimit;
1618 theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
1621 chunkInInode = (chunkOffset <<
1622 YAFFS_TNODES_LEVEL0_BITS) + i;
1625 yaffs_FindChunkInGroup(dev,
1631 if (foundChunk > 0) {
1632 yaffs_DeleteChunk(dev,
1637 *limit = *limit - 1;
1644 yaffs_PutLevel0Tnode(dev, tn, i, 0);
1648 return (i < 0) ? 1 : 0;
1658 static void yaffs_SoftDeleteChunk(yaffs_Device *dev, int chunk)
1660 yaffs_BlockInfo *theBlock;
1662 T(YAFFS_TRACE_DELETION, (TSTR("soft delete chunk %d" TENDSTR), chunk));
1664 theBlock = yaffs_GetBlockInfo(dev, chunk / dev->nChunksPerBlock);
1666 theBlock->softDeletions++;
1671 /* SoftDeleteWorker scans backwards through the tnode tree and soft deletes all the chunks in the file.
1672 * All soft deleting does is increment the block's softdelete count and pulls the chunk out
1674 * Thus, essentially this is the same as DeleteWorker except that the chunks are soft deleted.
1677 static int yaffs_SoftDeleteWorker(yaffs_Object *in, yaffs_Tnode *tn,
1678 __u32 level, int chunkOffset)
1683 yaffs_Device *dev = in->myDev;
1688 for (i = YAFFS_NTNODES_INTERNAL - 1; allDone && i >= 0;
1690 if (tn->internal[i]) {
1692 yaffs_SoftDeleteWorker(in,
1698 YAFFS_TNODES_INTERNAL_BITS)
1701 yaffs_FreeTnode(dev,
1704 tn->internal[i] = NULL;
1706 /* Hoosterman... how could this happen? */
1710 return (allDone) ? 1 : 0;
1711 } else if (level == 0) {
1713 for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0; i--) {
1714 theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
1716 /* Note this does not find the real chunk, only the chunk group.
1717 * We make an assumption that a chunk group is not larger than
1720 yaffs_SoftDeleteChunk(dev, theChunk);
1721 yaffs_PutLevel0Tnode(dev, tn, i, 0);
1735 static void yaffs_SoftDeleteFile(yaffs_Object *obj)
1738 obj->variantType == YAFFS_OBJECT_TYPE_FILE && !obj->softDeleted) {
1739 if (obj->nDataChunks <= 0) {
1740 /* Empty file with no duplicate object headers, just delete it immediately */
1741 yaffs_FreeTnode(obj->myDev,
1742 obj->variant.fileVariant.top);
1743 obj->variant.fileVariant.top = NULL;
1744 T(YAFFS_TRACE_TRACING,
1745 (TSTR("yaffs: Deleting empty file %d" TENDSTR),
1747 yaffs_DoGenericObjectDeletion(obj);
1749 yaffs_SoftDeleteWorker(obj,
1750 obj->variant.fileVariant.top,
1751 obj->variant.fileVariant.
1753 obj->softDeleted = 1;
1758 /* Pruning removes any part of the file structure tree that is beyond the
1759 * bounds of the file (ie that does not point to chunks).
1761 * A file should only get pruned when its size is reduced.
1763 * Before pruning, the chunks must be pulled from the tree and the
1764 * level 0 tnode entries must be zeroed out.
1765 * Could also use this for file deletion, but that's probably better handled
1766 * by a special case.
1769 static yaffs_Tnode *yaffs_PruneWorker(yaffs_Device *dev, yaffs_Tnode *tn,
1770 __u32 level, int del0)
1778 for (i = 0; i < YAFFS_NTNODES_INTERNAL; i++) {
1779 if (tn->internal[i] && level > 0) {
1781 yaffs_PruneWorker(dev, tn->internal[i],
1783 (i == 0) ? del0 : 1);
1786 if (tn->internal[i])
1790 if (hasData == 0 && del0) {
1791 /* Free and return NULL */
1793 yaffs_FreeTnode(dev, tn);
1803 static int yaffs_PruneFileStructure(yaffs_Device *dev,
1804 yaffs_FileStructure *fStruct)
1811 if (fStruct->topLevel > 0) {
1813 yaffs_PruneWorker(dev, fStruct->top, fStruct->topLevel, 0);
1815 /* Now we have a tree with all the non-zero branches NULL but the height
1816 * is the same as it was.
1817 * Let's see if we can trim internal tnodes to shorten the tree.
1818 * We can do this if only the 0th element in the tnode is in use
1819 * (ie all the non-zero are NULL)
1822 while (fStruct->topLevel && !done) {
1826 for (i = 1; i < YAFFS_NTNODES_INTERNAL; i++) {
1827 if (tn->internal[i])
1832 fStruct->top = tn->internal[0];
1833 fStruct->topLevel--;
1834 yaffs_FreeTnode(dev, tn);
1844 /*-------------------- End of File Structure functions.-------------------*/
1846 /* yaffs_CreateFreeObjects creates a bunch more objects and
1847 * adds them to the object free list.
1849 static int yaffs_CreateFreeObjects(yaffs_Device *dev, int nObjects)
1852 yaffs_Object *newObjects;
1853 yaffs_ObjectList *list;
1858 /* make these things */
1859 newObjects = YMALLOC(nObjects * sizeof(yaffs_Object));
1860 list = YMALLOC(sizeof(yaffs_ObjectList));
1862 if (!newObjects || !list) {
1867 T(YAFFS_TRACE_ALLOCATE,
1868 (TSTR("yaffs: Could not allocate more objects" TENDSTR)));
1872 /* Hook them into the free list */
1873 for (i = 0; i < nObjects - 1; i++) {
1874 newObjects[i].siblings.next =
1875 (struct ylist_head *)(&newObjects[i + 1]);
1878 newObjects[nObjects - 1].siblings.next = (void *)dev->freeObjects;
1879 dev->freeObjects = newObjects;
1880 dev->nFreeObjects += nObjects;
1881 dev->nObjectsCreated += nObjects;
1883 /* Now add this bunch of Objects to a list for freeing up. */
1885 list->objects = newObjects;
1886 list->next = dev->allocatedObjectList;
1887 dev->allocatedObjectList = list;
1893 /* AllocateEmptyObject gets us a clean Object. Tries to make allocate more if we run out */
1894 static yaffs_Object *yaffs_AllocateEmptyObject(yaffs_Device *dev)
1896 yaffs_Object *tn = NULL;
1898 #ifdef VALGRIND_TEST
1899 tn = YMALLOC(sizeof(yaffs_Object));
1901 /* If there are none left make more */
1902 if (!dev->freeObjects)
1903 yaffs_CreateFreeObjects(dev, YAFFS_ALLOCATION_NOBJECTS);
1905 if (dev->freeObjects) {
1906 tn = dev->freeObjects;
1908 (yaffs_Object *) (dev->freeObjects->siblings.next);
1909 dev->nFreeObjects--;
1913 /* Now sweeten it up... */
1915 memset(tn, 0, sizeof(yaffs_Object));
1916 tn->beingCreated = 1;
1920 tn->variantType = YAFFS_OBJECT_TYPE_UNKNOWN;
1921 YINIT_LIST_HEAD(&(tn->hardLinks));
1922 YINIT_LIST_HEAD(&(tn->hashLink));
1923 YINIT_LIST_HEAD(&tn->siblings);
1926 /* Now make the directory sane */
1928 tn->parent = dev->rootDir;
1929 ylist_add(&(tn->siblings), &dev->rootDir->variant.directoryVariant.children);
1932 /* Add it to the lost and found directory.
1933 * NB Can't put root or lostNFound in lostNFound so
1934 * check if lostNFound exists first
1936 if (dev->lostNFoundDir)
1937 yaffs_AddObjectToDirectory(dev->lostNFoundDir, tn);
1939 tn->beingCreated = 0;
1942 dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
1947 static yaffs_Object *yaffs_CreateFakeDirectory(yaffs_Device *dev, int number,
1952 yaffs_CreateNewObject(dev, number, YAFFS_OBJECT_TYPE_DIRECTORY);
1954 obj->fake = 1; /* it is fake so it might have no NAND presence... */
1955 obj->renameAllowed = 0; /* ... and we're not allowed to rename it... */
1956 obj->unlinkAllowed = 0; /* ... or unlink it */
1959 obj->yst_mode = mode;
1961 obj->hdrChunk = 0; /* Not a valid chunk. */
1968 static void yaffs_UnhashObject(yaffs_Object *tn)
1971 yaffs_Device *dev = tn->myDev;
1973 /* If it is still linked into the bucket list, free from the list */
1974 if (!ylist_empty(&tn->hashLink)) {
1975 ylist_del_init(&tn->hashLink);
1976 bucket = yaffs_HashFunction(tn->objectId);
1977 dev->objectBucket[bucket].count--;
1981 /* FreeObject frees up a Object and puts it back on the free list */
1982 static void yaffs_FreeObject(yaffs_Object *tn)
1984 yaffs_Device *dev = tn->myDev;
1987 T(YAFFS_TRACE_OS, (TSTR("FreeObject %p inode %p"TENDSTR), tn, tn->myInode));
1992 if (!ylist_empty(&tn->siblings))
1998 /* We're still hooked up to a cached inode.
1999 * Don't delete now, but mark for later deletion
2001 tn->deferedFree = 1;
2006 yaffs_UnhashObject(tn);
2008 #ifdef VALGRIND_TEST
2011 /* Link into the free list. */
2012 tn->siblings.next = (struct ylist_head *)(dev->freeObjects);
2013 dev->freeObjects = tn;
2014 dev->nFreeObjects++;
2016 dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
2021 void yaffs_HandleDeferedFree(yaffs_Object *obj)
2023 if (obj->deferedFree)
2024 yaffs_FreeObject(obj);
2029 static void yaffs_DeinitialiseObjects(yaffs_Device *dev)
2031 /* Free the list of allocated Objects */
2033 yaffs_ObjectList *tmp;
2035 while (dev->allocatedObjectList) {
2036 tmp = dev->allocatedObjectList->next;
2037 YFREE(dev->allocatedObjectList->objects);
2038 YFREE(dev->allocatedObjectList);
2040 dev->allocatedObjectList = tmp;
2043 dev->freeObjects = NULL;
2044 dev->nFreeObjects = 0;
2047 static void yaffs_InitialiseObjects(yaffs_Device *dev)
2051 dev->allocatedObjectList = NULL;
2052 dev->freeObjects = NULL;
2053 dev->nFreeObjects = 0;
2055 for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
2056 YINIT_LIST_HEAD(&dev->objectBucket[i].list);
2057 dev->objectBucket[i].count = 0;
2061 static int yaffs_FindNiceObjectBucket(yaffs_Device *dev)
2066 int lowest = 999999;
2068 /* First let's see if we can find one that's empty. */
2070 for (i = 0; i < 10 && lowest > 0; i++) {
2072 x %= YAFFS_NOBJECT_BUCKETS;
2073 if (dev->objectBucket[x].count < lowest) {
2074 lowest = dev->objectBucket[x].count;
2080 /* If we didn't find an empty list, then try
2081 * looking a bit further for a short one
2084 for (i = 0; i < 10 && lowest > 3; i++) {
2086 x %= YAFFS_NOBJECT_BUCKETS;
2087 if (dev->objectBucket[x].count < lowest) {
2088 lowest = dev->objectBucket[x].count;
2097 static int yaffs_CreateNewObjectNumber(yaffs_Device *dev)
2099 int bucket = yaffs_FindNiceObjectBucket(dev);
2101 /* Now find an object value that has not already been taken
2102 * by scanning the list.
2106 struct ylist_head *i;
2108 __u32 n = (__u32) bucket;
2110 /* yaffs_CheckObjectHashSanity(); */
2114 n += YAFFS_NOBJECT_BUCKETS;
2115 if (1 || dev->objectBucket[bucket].count > 0) {
2116 ylist_for_each(i, &dev->objectBucket[bucket].list) {
2117 /* If there is already one in the list */
2118 if (i && ylist_entry(i, yaffs_Object,
2119 hashLink)->objectId == n) {
2129 static void yaffs_HashObject(yaffs_Object *in)
2131 int bucket = yaffs_HashFunction(in->objectId);
2132 yaffs_Device *dev = in->myDev;
2134 ylist_add(&in->hashLink, &dev->objectBucket[bucket].list);
2135 dev->objectBucket[bucket].count++;
2138 yaffs_Object *yaffs_FindObjectByNumber(yaffs_Device *dev, __u32 number)
2140 int bucket = yaffs_HashFunction(number);
2141 struct ylist_head *i;
2144 ylist_for_each(i, &dev->objectBucket[bucket].list) {
2145 /* Look if it is in the list */
2147 in = ylist_entry(i, yaffs_Object, hashLink);
2148 if (in->objectId == number) {
2150 /* Don't tell the VFS about this one if it is defered free */
2151 if (in->deferedFree)
2163 yaffs_Object *yaffs_CreateNewObject(yaffs_Device *dev, int number,
2164 yaffs_ObjectType type)
2166 yaffs_Object *theObject;
2167 yaffs_Tnode *tn = NULL;
2170 number = yaffs_CreateNewObjectNumber(dev);
2172 theObject = yaffs_AllocateEmptyObject(dev);
2176 if (type == YAFFS_OBJECT_TYPE_FILE) {
2177 tn = yaffs_GetTnode(dev);
2179 yaffs_FreeObject(theObject);
2185 theObject->fake = 0;
2186 theObject->renameAllowed = 1;
2187 theObject->unlinkAllowed = 1;
2188 theObject->objectId = number;
2189 yaffs_HashObject(theObject);
2190 theObject->variantType = type;
2191 #ifdef CONFIG_YAFFS_WINCE
2192 yfsd_WinFileTimeNow(theObject->win_atime);
2193 theObject->win_ctime[0] = theObject->win_mtime[0] =
2194 theObject->win_atime[0];
2195 theObject->win_ctime[1] = theObject->win_mtime[1] =
2196 theObject->win_atime[1];
2200 theObject->yst_atime = theObject->yst_mtime =
2201 theObject->yst_ctime = Y_CURRENT_TIME;
2204 case YAFFS_OBJECT_TYPE_FILE:
2205 theObject->variant.fileVariant.fileSize = 0;
2206 theObject->variant.fileVariant.scannedFileSize = 0;
2207 theObject->variant.fileVariant.shrinkSize = 0xFFFFFFFF; /* max __u32 */
2208 theObject->variant.fileVariant.topLevel = 0;
2209 theObject->variant.fileVariant.top = tn;
2211 case YAFFS_OBJECT_TYPE_DIRECTORY:
2212 YINIT_LIST_HEAD(&theObject->variant.directoryVariant.
2215 case YAFFS_OBJECT_TYPE_SYMLINK:
2216 case YAFFS_OBJECT_TYPE_HARDLINK:
2217 case YAFFS_OBJECT_TYPE_SPECIAL:
2218 /* No action required */
2220 case YAFFS_OBJECT_TYPE_UNKNOWN:
2221 /* todo this should not happen */
2229 static yaffs_Object *yaffs_FindOrCreateObjectByNumber(yaffs_Device *dev,
2231 yaffs_ObjectType type)
2233 yaffs_Object *theObject = NULL;
2236 theObject = yaffs_FindObjectByNumber(dev, number);
2239 theObject = yaffs_CreateNewObject(dev, number, type);
2246 static YCHAR *yaffs_CloneString(const YCHAR *str)
2248 YCHAR *newStr = NULL;
2251 newStr = YMALLOC((yaffs_strlen(str) + 1) * sizeof(YCHAR));
2253 yaffs_strcpy(newStr, str);
2261 * Mknod (create) a new object.
2262 * equivalentObject only has meaning for a hard link;
2263 * aliasString only has meaning for a sumlink.
2264 * rdev only has meaning for devices (a subset of special objects)
2267 static yaffs_Object *yaffs_MknodObject(yaffs_ObjectType type,
2268 yaffs_Object *parent,
2273 yaffs_Object *equivalentObject,
2274 const YCHAR *aliasString, __u32 rdev)
2279 yaffs_Device *dev = parent->myDev;
2281 /* Check if the entry exists. If it does then fail the call since we don't want a dup.*/
2282 if (yaffs_FindObjectByName(parent, name))
2285 in = yaffs_CreateNewObject(dev, -1, type);
2290 if (type == YAFFS_OBJECT_TYPE_SYMLINK) {
2291 str = yaffs_CloneString(aliasString);
2293 yaffs_FreeObject(in);
2303 in->variantType = type;
2305 in->yst_mode = mode;
2307 #ifdef CONFIG_YAFFS_WINCE
2308 yfsd_WinFileTimeNow(in->win_atime);
2309 in->win_ctime[0] = in->win_mtime[0] = in->win_atime[0];
2310 in->win_ctime[1] = in->win_mtime[1] = in->win_atime[1];
2313 in->yst_atime = in->yst_mtime = in->yst_ctime = Y_CURRENT_TIME;
2315 in->yst_rdev = rdev;
2319 in->nDataChunks = 0;
2321 yaffs_SetObjectName(in, name);
2324 yaffs_AddObjectToDirectory(parent, in);
2326 in->myDev = parent->myDev;
2329 case YAFFS_OBJECT_TYPE_SYMLINK:
2330 in->variant.symLinkVariant.alias = str;
2332 case YAFFS_OBJECT_TYPE_HARDLINK:
2333 in->variant.hardLinkVariant.equivalentObject =
2335 in->variant.hardLinkVariant.equivalentObjectId =
2336 equivalentObject->objectId;
2337 ylist_add(&in->hardLinks, &equivalentObject->hardLinks);
2339 case YAFFS_OBJECT_TYPE_FILE:
2340 case YAFFS_OBJECT_TYPE_DIRECTORY:
2341 case YAFFS_OBJECT_TYPE_SPECIAL:
2342 case YAFFS_OBJECT_TYPE_UNKNOWN:
2347 if (yaffs_UpdateObjectHeader(in, name, 0, 0, 0) < 0) {
2348 /* Could not create the object header, fail the creation */
2349 yaffs_DeleteObject(in);
2353 yaffs_UpdateParent(parent);
2359 yaffs_Object *yaffs_MknodFile(yaffs_Object *parent, const YCHAR *name,
2360 __u32 mode, __u32 uid, __u32 gid)
2362 return yaffs_MknodObject(YAFFS_OBJECT_TYPE_FILE, parent, name, mode,
2363 uid, gid, NULL, NULL, 0);
2366 yaffs_Object *yaffs_MknodDirectory(yaffs_Object *parent, const YCHAR *name,
2367 __u32 mode, __u32 uid, __u32 gid)
2369 return yaffs_MknodObject(YAFFS_OBJECT_TYPE_DIRECTORY, parent, name,
2370 mode, uid, gid, NULL, NULL, 0);
2373 yaffs_Object *yaffs_MknodSpecial(yaffs_Object *parent, const YCHAR *name,
2374 __u32 mode, __u32 uid, __u32 gid, __u32 rdev)
2376 return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SPECIAL, parent, name, mode,
2377 uid, gid, NULL, NULL, rdev);
2380 yaffs_Object *yaffs_MknodSymLink(yaffs_Object *parent, const YCHAR *name,
2381 __u32 mode, __u32 uid, __u32 gid,
2384 return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SYMLINK, parent, name, mode,
2385 uid, gid, NULL, alias, 0);
2388 /* yaffs_Link returns the object id of the equivalent object.*/
2389 yaffs_Object *yaffs_Link(yaffs_Object *parent, const YCHAR *name,
2390 yaffs_Object *equivalentObject)
2392 /* Get the real object in case we were fed a hard link as an equivalent object */
2393 equivalentObject = yaffs_GetEquivalentObject(equivalentObject);
2395 if (yaffs_MknodObject
2396 (YAFFS_OBJECT_TYPE_HARDLINK, parent, name, 0, 0, 0,
2397 equivalentObject, NULL, 0)) {
2398 return equivalentObject;
2405 static int yaffs_ChangeObjectName(yaffs_Object *obj, yaffs_Object *newDir,
2406 const YCHAR *newName, int force, int shadows)
2411 yaffs_Object *existingTarget;
2414 newDir = obj->parent; /* use the old directory */
2416 if (newDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
2417 T(YAFFS_TRACE_ALWAYS,
2419 ("tragedy: yaffs_ChangeObjectName: newDir is not a directory"
2424 /* TODO: Do we need this different handling for YAFFS2 and YAFFS1?? */
2425 if (obj->myDev->isYaffs2)
2426 unlinkOp = (newDir == obj->myDev->unlinkedDir);
2428 unlinkOp = (newDir == obj->myDev->unlinkedDir
2429 && obj->variantType == YAFFS_OBJECT_TYPE_FILE);
2431 deleteOp = (newDir == obj->myDev->deletedDir);
2433 existingTarget = yaffs_FindObjectByName(newDir, newName);
2435 /* If the object is a file going into the unlinked directory,
2436 * then it is OK to just stuff it in since duplicate names are allowed.
2437 * else only proceed if the new name does not exist and if we're putting
2438 * it into a directory.
2445 newDir->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) {
2446 yaffs_SetObjectName(obj, newName);
2449 yaffs_AddObjectToDirectory(newDir, obj);
2454 /* If it is a deletion then we mark it as a shrink for gc purposes. */
2455 if (yaffs_UpdateObjectHeader(obj, newName, 0, deleteOp, shadows) >= 0)
2462 int yaffs_RenameObject(yaffs_Object *oldDir, const YCHAR *oldName,
2463 yaffs_Object *newDir, const YCHAR *newName)
2465 yaffs_Object *obj = NULL;
2466 yaffs_Object *existingTarget = NULL;
2472 if (!oldDir || oldDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
2474 if (!newDir || newDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
2477 dev = oldDir->myDev;
2479 #ifdef CONFIG_YAFFS_CASE_INSENSITIVE
2480 /* Special case for case insemsitive systems (eg. WinCE).
2481 * While look-up is case insensitive, the name isn't.
2482 * Therefore we might want to change x.txt to X.txt
2484 if (oldDir == newDir && yaffs_strcmp(oldName, newName) == 0)
2488 if(yaffs_strlen(newName) > YAFFS_MAX_NAME_LENGTH)
2492 obj = yaffs_FindObjectByName(oldDir, oldName);
2494 if (obj && obj->renameAllowed) {
2496 /* Now do the handling for an existing target, if there is one */
2498 existingTarget = yaffs_FindObjectByName(newDir, newName);
2499 if (existingTarget &&
2500 existingTarget->variantType == YAFFS_OBJECT_TYPE_DIRECTORY &&
2501 !ylist_empty(&existingTarget->variant.directoryVariant.children)) {
2502 /* There is a target that is a non-empty directory, so we fail */
2503 return YAFFS_FAIL; /* EEXIST or ENOTEMPTY */
2504 } else if (existingTarget && existingTarget != obj) {
2505 /* Nuke the target first, using shadowing,
2506 * but only if it isn't the same object.
2508 * Note we must disable gc otherwise it can mess up the shadowing.
2512 yaffs_ChangeObjectName(obj, newDir, newName, force,
2513 existingTarget->objectId);
2514 existingTarget->isShadowed = 1;
2515 yaffs_UnlinkObject(existingTarget);
2519 result = yaffs_ChangeObjectName(obj, newDir, newName, 1, 0);
2521 yaffs_UpdateParent(oldDir);
2522 if(newDir != oldDir)
2523 yaffs_UpdateParent(newDir);
2530 /*------------------------- Block Management and Page Allocation ----------------*/
2532 static int yaffs_InitialiseBlocks(yaffs_Device *dev)
2534 int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1;
2536 dev->blockInfo = NULL;
2537 dev->chunkBits = NULL;
2539 dev->allocationBlock = -1; /* force it to get a new one */
2541 /* If the first allocation strategy fails, thry the alternate one */
2542 dev->blockInfo = YMALLOC(nBlocks * sizeof(yaffs_BlockInfo));
2543 if (!dev->blockInfo) {
2544 dev->blockInfo = YMALLOC_ALT(nBlocks * sizeof(yaffs_BlockInfo));
2545 dev->blockInfoAlt = 1;
2547 dev->blockInfoAlt = 0;
2549 if (dev->blockInfo) {
2550 /* Set up dynamic blockinfo stuff. */
2551 dev->chunkBitmapStride = (dev->nChunksPerBlock + 7) / 8; /* round up bytes */
2552 dev->chunkBits = YMALLOC(dev->chunkBitmapStride * nBlocks);
2553 if (!dev->chunkBits) {
2554 dev->chunkBits = YMALLOC_ALT(dev->chunkBitmapStride * nBlocks);
2555 dev->chunkBitsAlt = 1;
2557 dev->chunkBitsAlt = 0;
2560 if (dev->blockInfo && dev->chunkBits) {
2561 memset(dev->blockInfo, 0, nBlocks * sizeof(yaffs_BlockInfo));
2562 memset(dev->chunkBits, 0, dev->chunkBitmapStride * nBlocks);
2569 static void yaffs_DeinitialiseBlocks(yaffs_Device *dev)
2571 if (dev->blockInfoAlt && dev->blockInfo)
2572 YFREE_ALT(dev->blockInfo);
2573 else if (dev->blockInfo)
2574 YFREE(dev->blockInfo);
2576 dev->blockInfoAlt = 0;
2578 dev->blockInfo = NULL;
2580 if (dev->chunkBitsAlt && dev->chunkBits)
2581 YFREE_ALT(dev->chunkBits);
2582 else if (dev->chunkBits)
2583 YFREE(dev->chunkBits);
2584 dev->chunkBitsAlt = 0;
2585 dev->chunkBits = NULL;
2588 static int yaffs_BlockNotDisqualifiedFromGC(yaffs_Device *dev,
2589 yaffs_BlockInfo *bi)
2596 return 1; /* disqualification only applies to yaffs2. */
2598 if (!bi->hasShrinkHeader)
2599 return 1; /* can gc */
2601 /* Find the oldest dirty sequence number if we don't know it and save it
2602 * so we don't have to keep recomputing it.
2604 if (!dev->oldestDirtySequence) {
2605 seq = dev->sequenceNumber;
2607 for (i = dev->internalStartBlock; i <= dev->internalEndBlock;
2609 b = yaffs_GetBlockInfo(dev, i);
2610 if (b->blockState == YAFFS_BLOCK_STATE_FULL &&
2611 (b->pagesInUse - b->softDeletions) <
2612 dev->nChunksPerBlock && b->sequenceNumber < seq) {
2613 seq = b->sequenceNumber;
2616 dev->oldestDirtySequence = seq;
2619 /* Can't do gc of this block if there are any blocks older than this one that have
2622 return (bi->sequenceNumber <= dev->oldestDirtySequence);
2625 /* FindDiretiestBlock is used to select the dirtiest block (or close enough)
2626 * for garbage collection.
2629 static int yaffs_FindBlockForGarbageCollection(yaffs_Device *dev,
2632 int b = dev->currentDirtyChecker;
2638 int prioritised = 0;
2639 yaffs_BlockInfo *bi;
2640 int pendingPrioritisedExist = 0;
2642 /* First let's see if we need to grab a prioritised block */
2643 if (dev->hasPendingPrioritisedGCs) {
2644 for (i = dev->internalStartBlock; i < dev->internalEndBlock && !prioritised; i++) {
2646 bi = yaffs_GetBlockInfo(dev, i);
2647 /* yaffs_VerifyBlock(dev,bi,i); */
2649 if (bi->gcPrioritise) {
2650 pendingPrioritisedExist = 1;
2651 if (bi->blockState == YAFFS_BLOCK_STATE_FULL &&
2652 yaffs_BlockNotDisqualifiedFromGC(dev, bi)) {
2653 pagesInUse = (bi->pagesInUse - bi->softDeletions);
2656 aggressive = 1; /* Fool the non-aggressive skip logiv below */
2661 if (!pendingPrioritisedExist) /* None found, so we can clear this */
2662 dev->hasPendingPrioritisedGCs = 0;
2665 /* If we're doing aggressive GC then we are happy to take a less-dirty block, and
2667 * else (we're doing a leasurely gc), then we only bother to do this if the
2668 * block has only a few pages in use.
2671 dev->nonAggressiveSkip--;
2673 if (!aggressive && (dev->nonAggressiveSkip > 0))
2678 (aggressive) ? dev->nChunksPerBlock : YAFFS_PASSIVE_GC_CHUNKS + 1;
2682 dev->internalEndBlock - dev->internalStartBlock + 1;
2685 dev->internalEndBlock - dev->internalStartBlock + 1;
2686 iterations = iterations / 16;
2687 if (iterations > 200)
2691 for (i = 0; i <= iterations && pagesInUse > 0 && !prioritised; i++) {
2693 if (b < dev->internalStartBlock || b > dev->internalEndBlock)
2694 b = dev->internalStartBlock;
2696 if (b < dev->internalStartBlock || b > dev->internalEndBlock) {
2697 T(YAFFS_TRACE_ERROR,
2698 (TSTR("**>> Block %d is not valid" TENDSTR), b));
2702 bi = yaffs_GetBlockInfo(dev, b);
2704 if (bi->blockState == YAFFS_BLOCK_STATE_FULL &&
2705 (bi->pagesInUse - bi->softDeletions) < pagesInUse &&
2706 yaffs_BlockNotDisqualifiedFromGC(dev, bi)) {
2708 pagesInUse = (bi->pagesInUse - bi->softDeletions);
2712 dev->currentDirtyChecker = b;
2716 (TSTR("GC Selected block %d with %d free, prioritised:%d" TENDSTR), dirtiest,
2717 dev->nChunksPerBlock - pagesInUse, prioritised));
2720 dev->oldestDirtySequence = 0;
2723 dev->nonAggressiveSkip = 4;
2728 static void yaffs_BlockBecameDirty(yaffs_Device *dev, int blockNo)
2730 yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockNo);
2734 /* If the block is still healthy erase it and mark as clean.
2735 * If the block has had a data failure, then retire it.
2738 T(YAFFS_TRACE_GC | YAFFS_TRACE_ERASE,
2739 (TSTR("yaffs_BlockBecameDirty block %d state %d %s"TENDSTR),
2740 blockNo, bi->blockState, (bi->needsRetiring) ? "needs retiring" : ""));
2742 bi->blockState = YAFFS_BLOCK_STATE_DIRTY;
2744 if (!bi->needsRetiring) {
2745 yaffs_InvalidateCheckpoint(dev);
2746 erasedOk = yaffs_EraseBlockInNAND(dev, blockNo);
2748 dev->nErasureFailures++;
2749 T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
2750 (TSTR("**>> Erasure failed %d" TENDSTR), blockNo));
2755 ((yaffs_traceMask & YAFFS_TRACE_ERASE) || !yaffs_SkipVerification(dev))) {
2757 for (i = 0; i < dev->nChunksPerBlock; i++) {
2758 if (!yaffs_CheckChunkErased
2759 (dev, blockNo * dev->nChunksPerBlock + i)) {
2760 T(YAFFS_TRACE_ERROR,
2762 (">>Block %d erasure supposedly OK, but chunk %d not erased"
2763 TENDSTR), blockNo, i));
2769 /* Clean it up... */
2770 bi->blockState = YAFFS_BLOCK_STATE_EMPTY;
2771 dev->nErasedBlocks++;
2773 bi->softDeletions = 0;
2774 bi->hasShrinkHeader = 0;
2775 bi->skipErasedCheck = 1; /* This is clean, so no need to check */
2776 bi->gcPrioritise = 0;
2777 yaffs_ClearChunkBits(dev, blockNo);
2779 T(YAFFS_TRACE_ERASE,
2780 (TSTR("Erased block %d" TENDSTR), blockNo));
2782 dev->nFreeChunks -= dev->nChunksPerBlock; /* We lost a block of free space */
2784 yaffs_RetireBlock(dev, blockNo);
2785 T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
2786 (TSTR("**>> Block %d retired" TENDSTR), blockNo));
2790 static int yaffs_FindBlockForAllocation(yaffs_Device *dev)
2794 yaffs_BlockInfo *bi;
2796 if (dev->nErasedBlocks < 1) {
2797 /* Hoosterman we've got a problem.
2798 * Can't get space to gc
2800 T(YAFFS_TRACE_ERROR,
2801 (TSTR("yaffs tragedy: no more erased blocks" TENDSTR)));
2806 /* Find an empty block. */
2808 for (i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) {
2809 dev->allocationBlockFinder++;
2810 if (dev->allocationBlockFinder < dev->internalStartBlock
2811 || dev->allocationBlockFinder > dev->internalEndBlock) {
2812 dev->allocationBlockFinder = dev->internalStartBlock;
2815 bi = yaffs_GetBlockInfo(dev, dev->allocationBlockFinder);
2817 if (bi->blockState == YAFFS_BLOCK_STATE_EMPTY) {
2818 bi->blockState = YAFFS_BLOCK_STATE_ALLOCATING;
2819 dev->sequenceNumber++;
2820 bi->sequenceNumber = dev->sequenceNumber;
2821 dev->nErasedBlocks--;
2822 T(YAFFS_TRACE_ALLOCATE,
2823 (TSTR("Allocated block %d, seq %d, %d left" TENDSTR),
2824 dev->allocationBlockFinder, dev->sequenceNumber,
2825 dev->nErasedBlocks));
2826 return dev->allocationBlockFinder;
2830 T(YAFFS_TRACE_ALWAYS,
2832 ("yaffs tragedy: no more erased blocks, but there should have been %d"
2833 TENDSTR), dev->nErasedBlocks));
2840 static int yaffs_CalcCheckpointBlocksRequired(yaffs_Device *dev)
2842 if (!dev->nCheckpointBlocksRequired &&
2844 /* Not a valid value so recalculate */
2847 int devBlocks = (dev->endBlock - dev->startBlock + 1);
2850 tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
2852 if (tnodeSize < sizeof(yaffs_Tnode))
2853 tnodeSize = sizeof(yaffs_Tnode);
2855 nBytes += sizeof(yaffs_CheckpointValidity);
2856 nBytes += sizeof(yaffs_CheckpointDevice);
2857 nBytes += devBlocks * sizeof(yaffs_BlockInfo);
2858 nBytes += devBlocks * dev->chunkBitmapStride;
2859 nBytes += (sizeof(yaffs_CheckpointObject) + sizeof(__u32)) * (dev->nObjectsCreated - dev->nFreeObjects);
2860 nBytes += (tnodeSize + sizeof(__u32)) * (dev->nTnodesCreated - dev->nFreeTnodes);
2861 nBytes += sizeof(yaffs_CheckpointValidity);
2862 nBytes += sizeof(__u32); /* checksum*/
2864 /* Round up and add 2 blocks to allow for some bad blocks, so add 3 */
2866 nBlocks = (nBytes/(dev->nDataBytesPerChunk * dev->nChunksPerBlock)) + 3;
2868 dev->nCheckpointBlocksRequired = nBlocks;
2871 return dev->nCheckpointBlocksRequired;
2875 * Check if there's space to allocate...
2876 * Thinks.... do we need top make this ths same as yaffs_GetFreeChunks()?
2878 static int yaffs_CheckSpaceForAllocation(yaffs_Device *dev)
2881 int reservedBlocks = dev->nReservedBlocks;
2882 int checkpointBlocks;
2884 if (dev->isYaffs2) {
2885 checkpointBlocks = yaffs_CalcCheckpointBlocksRequired(dev) -
2886 dev->blocksInCheckpoint;
2887 if (checkpointBlocks < 0)
2888 checkpointBlocks = 0;
2890 checkpointBlocks = 0;
2893 reservedChunks = ((reservedBlocks + checkpointBlocks) * dev->nChunksPerBlock);
2895 return (dev->nFreeChunks > reservedChunks);
2898 static int yaffs_AllocateChunk(yaffs_Device *dev, int useReserve,
2899 yaffs_BlockInfo **blockUsedPtr)
2902 yaffs_BlockInfo *bi;
2904 if (dev->allocationBlock < 0) {
2905 /* Get next block to allocate off */
2906 dev->allocationBlock = yaffs_FindBlockForAllocation(dev);
2907 dev->allocationPage = 0;
2910 if (!useReserve && !yaffs_CheckSpaceForAllocation(dev)) {
2911 /* Not enough space to allocate unless we're allowed to use the reserve. */
2915 if (dev->nErasedBlocks < dev->nReservedBlocks
2916 && dev->allocationPage == 0) {
2917 T(YAFFS_TRACE_ALLOCATE, (TSTR("Allocating reserve" TENDSTR)));
2920 /* Next page please.... */
2921 if (dev->allocationBlock >= 0) {
2922 bi = yaffs_GetBlockInfo(dev, dev->allocationBlock);
2924 retVal = (dev->allocationBlock * dev->nChunksPerBlock) +
2925 dev->allocationPage;
2927 yaffs_SetChunkBit(dev, dev->allocationBlock,
2928 dev->allocationPage);
2930 dev->allocationPage++;
2934 /* If the block is full set the state to full */
2935 if (dev->allocationPage >= dev->nChunksPerBlock) {
2936 bi->blockState = YAFFS_BLOCK_STATE_FULL;
2937 dev->allocationBlock = -1;
2946 T(YAFFS_TRACE_ERROR,
2947 (TSTR("!!!!!!!!! Allocator out !!!!!!!!!!!!!!!!!" TENDSTR)));
2952 static int yaffs_GetErasedChunks(yaffs_Device *dev)
2956 n = dev->nErasedBlocks * dev->nChunksPerBlock;
2958 if (dev->allocationBlock > 0)
2959 n += (dev->nChunksPerBlock - dev->allocationPage);
2965 static int yaffs_GarbageCollectBlock(yaffs_Device *dev, int block,
2971 int retVal = YAFFS_OK;
2974 int isCheckpointBlock;
2978 int chunksBefore = yaffs_GetErasedChunks(dev);
2981 yaffs_ExtendedTags tags;
2983 yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, block);
2985 yaffs_Object *object;
2987 isCheckpointBlock = (bi->blockState == YAFFS_BLOCK_STATE_CHECKPOINT);
2990 T(YAFFS_TRACE_TRACING,
2991 (TSTR("Collecting block %d, in use %d, shrink %d, wholeBlock %d" TENDSTR),
2994 bi->hasShrinkHeader,
2997 /*yaffs_VerifyFreeChunks(dev); */
2999 if(bi->blockState == YAFFS_BLOCK_STATE_FULL)
3000 bi->blockState = YAFFS_BLOCK_STATE_COLLECTING;
3002 bi->hasShrinkHeader = 0; /* clear the flag so that the block can erase */
3004 /* Take off the number of soft deleted entries because
3005 * they're going to get really deleted during GC.
3007 if(dev->gcChunk == 0) /* first time through for this block */
3008 dev->nFreeChunks -= bi->softDeletions;
3012 if (isCheckpointBlock ||
3013 !yaffs_StillSomeChunkBits(dev, block)) {
3014 T(YAFFS_TRACE_TRACING,
3016 ("Collecting block %d that has no chunks in use" TENDSTR),
3018 yaffs_BlockBecameDirty(dev, block);
3021 __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__);
3023 yaffs_VerifyBlock(dev, bi, block);
3025 maxCopies = (wholeBlock) ? dev->nChunksPerBlock : 10;
3026 oldChunk = block * dev->nChunksPerBlock + dev->gcChunk;
3028 for (/* init already done */;
3029 retVal == YAFFS_OK &&
3030 dev->gcChunk < dev->nChunksPerBlock &&
3031 (bi->blockState == YAFFS_BLOCK_STATE_COLLECTING) &&
3033 dev->gcChunk++, oldChunk++) {
3034 if (yaffs_CheckChunkBit(dev, block, dev->gcChunk)) {
3036 /* This page is in use and might need to be copied off */
3042 yaffs_InitialiseTags(&tags);
3044 yaffs_ReadChunkWithTagsFromNAND(dev, oldChunk,
3048 yaffs_FindObjectByNumber(dev,
3051 T(YAFFS_TRACE_GC_DETAIL,
3053 ("Collecting chunk in block %d, %d %d %d " TENDSTR),
3054 dev->gcChunk, tags.objectId, tags.chunkId,
3057 if (object && !yaffs_SkipVerification(dev)) {
3058 if (tags.chunkId == 0)
3059 matchingChunk = object->hdrChunk;
3060 else if (object->softDeleted)
3061 matchingChunk = oldChunk; /* Defeat the test */
3063 matchingChunk = yaffs_FindChunkInFile(object, tags.chunkId, NULL);
3065 if (oldChunk != matchingChunk)
3066 T(YAFFS_TRACE_ERROR,
3067 (TSTR("gc: page in gc mismatch: %d %d %d %d"TENDSTR),
3068 oldChunk, matchingChunk, tags.objectId, tags.chunkId));
3073 T(YAFFS_TRACE_ERROR,
3075 ("page %d in gc has no object: %d %d %d "
3077 tags.objectId, tags.chunkId, tags.byteCount));
3082 object->softDeleted &&
3083 tags.chunkId != 0) {
3084 /* Data chunk in a soft deleted file, throw it away
3085 * It's a soft deleted data chunk,
3086 * No need to copy this, just forget about it and
3087 * fix up the object.
3090 object->nDataChunks--;
3092 if (object->nDataChunks <= 0) {
3093 /* remeber to clean up the object */
3094 dev->gcCleanupList[cleanups] =
3100 /* Todo object && object->deleted && object->nDataChunks == 0 */
3101 /* Deleted object header with no data chunks.
3102 * Can be discarded and the file deleted.
3104 object->hdrChunk = 0;
3105 yaffs_FreeTnode(object->myDev,
3108 object->variant.fileVariant.top = NULL;
3109 yaffs_DoGenericObjectDeletion(object);
3111 } else if (object) {
3112 /* It's either a data chunk in a live file or
3113 * an ObjectHeader, so we're interested in it.
3114 * NB Need to keep the ObjectHeaders of deleted files
3115 * until the whole file has been deleted off
3117 tags.serialNumber++;
3121 if (tags.chunkId == 0) {
3122 /* It is an object Id,
3123 * We need to nuke the shrinkheader flags first
3124 * We no longer want the shrinkHeader flag since its work is done
3125 * and if it is left in place it will mess up scanning.
3128 yaffs_ObjectHeader *oh;
3129 oh = (yaffs_ObjectHeader *)buffer;
3131 tags.extraIsShrinkHeader = 0;
3133 yaffs_VerifyObjectHeader(object, oh, &tags, 1);
3137 yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &tags, 1);
3140 retVal = YAFFS_FAIL;
3143 /* Ok, now fix up the Tnodes etc. */
3145 if (tags.chunkId == 0) {
3147 object->hdrChunk = newChunk;
3148 object->serial = tags.serialNumber;
3150 /* It's a data chunk */
3151 yaffs_PutChunkIntoFile
3159 if (retVal == YAFFS_OK)
3160 yaffs_DeleteChunk(dev, oldChunk, markNAND, __LINE__);
3165 yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
3168 /* Do any required cleanups */
3169 for (i = 0; i < cleanups; i++) {
3170 /* Time to delete the file too */
3172 yaffs_FindObjectByNumber(dev,
3173 dev->gcCleanupList[i]);
3175 yaffs_FreeTnode(dev,
3176 object->variant.fileVariant.
3178 object->variant.fileVariant.top = NULL;
3181 ("yaffs: About to finally delete object %d"
3182 TENDSTR), object->objectId));
3183 yaffs_DoGenericObjectDeletion(object);
3184 object->myDev->nDeletedFiles--;
3191 yaffs_VerifyCollectedBlock(dev, bi, block);
3193 chunksAfter = yaffs_GetErasedChunks(dev);
3194 if (chunksBefore >= chunksAfter) {
3197 ("gc did not increase free chunks before %d after %d"
3198 TENDSTR), chunksBefore, chunksAfter));
3201 /* If the gc completed then clear the current gcBlock so that we find another. */
3202 if (bi->blockState != YAFFS_BLOCK_STATE_COLLECTING) {
3212 /* New garbage collector
3213 * If we're very low on erased blocks then we do aggressive garbage collection
3214 * otherwise we do "leasurely" garbage collection.
3215 * Aggressive gc looks further (whole array) and will accept less dirty blocks.
3216 * Passive gc only inspects smaller areas and will only accept more dirty blocks.
3218 * The idea is to help clear out space in a more spread-out manner.
3219 * Dunno if it really does anything useful.
3221 static int yaffs_CheckGarbageCollection(yaffs_Device *dev)
3225 int gcOk = YAFFS_OK;
3228 int checkpointBlockAdjust;
3230 if (dev->isDoingGC) {
3231 /* Bail out so we don't get recursive gc */
3235 /* This loop should pass the first time.
3236 * We'll only see looping here if the erase of the collected block fails.
3242 checkpointBlockAdjust = yaffs_CalcCheckpointBlocksRequired(dev) - dev->blocksInCheckpoint;
3243 if (checkpointBlockAdjust < 0)
3244 checkpointBlockAdjust = 0;
3246 if (dev->nErasedBlocks < (dev->nReservedBlocks + checkpointBlockAdjust + 2)) {
3247 /* We need a block soon...*/
3250 /* We're in no hurry */
3254 if (dev->gcBlock <= 0) {
3255 dev->gcBlock = yaffs_FindBlockForGarbageCollection(dev, aggressive);
3259 block = dev->gcBlock;
3262 dev->garbageCollections++;
3264 dev->passiveGarbageCollections++;
3268 ("yaffs: GC erasedBlocks %d aggressive %d" TENDSTR),
3269 dev->nErasedBlocks, aggressive));
3271 gcOk = yaffs_GarbageCollectBlock(dev, block, aggressive);
3274 if (dev->nErasedBlocks < (dev->nReservedBlocks) && block > 0) {
3277 ("yaffs: GC !!!no reclaim!!! erasedBlocks %d after try %d block %d"
3278 TENDSTR), dev->nErasedBlocks, maxTries, block));
3280 } while ((dev->nErasedBlocks < dev->nReservedBlocks) &&
3284 return aggressive ? gcOk : YAFFS_OK;
3287 /*------------------------- TAGS --------------------------------*/
3289 static int yaffs_TagsMatch(const yaffs_ExtendedTags *tags, int objectId,
3292 return (tags->chunkId == chunkInObject &&
3293 tags->objectId == objectId && !tags->chunkDeleted) ? 1 : 0;
3298 /*-------------------- Data file manipulation -----------------*/
3300 static int yaffs_FindChunkInFile(yaffs_Object *in, int chunkInInode,
3301 yaffs_ExtendedTags *tags)
3303 /*Get the Tnode, then get the level 0 offset chunk offset */
3306 yaffs_ExtendedTags localTags;
3309 yaffs_Device *dev = in->myDev;
3312 /* Passed a NULL, so use our own tags space */
3316 tn = yaffs_FindLevel0Tnode(dev, &in->variant.fileVariant, chunkInInode);
3319 theChunk = yaffs_GetChunkGroupBase(dev, tn, chunkInInode);
3322 yaffs_FindChunkInGroup(dev, theChunk, tags, in->objectId,
3328 static int yaffs_FindAndDeleteChunkInFile(yaffs_Object *in, int chunkInInode,
3329 yaffs_ExtendedTags *tags)
3331 /* Get the Tnode, then get the level 0 offset chunk offset */
3334 yaffs_ExtendedTags localTags;
3336 yaffs_Device *dev = in->myDev;
3340 /* Passed a NULL, so use our own tags space */
3344 tn = yaffs_FindLevel0Tnode(dev, &in->variant.fileVariant, chunkInInode);
3348 theChunk = yaffs_GetChunkGroupBase(dev, tn, chunkInInode);
3351 yaffs_FindChunkInGroup(dev, theChunk, tags, in->objectId,
3354 /* Delete the entry in the filestructure (if found) */
3356 yaffs_PutLevel0Tnode(dev, tn, chunkInInode, 0);
3362 #ifdef YAFFS_PARANOID
3364 static int yaffs_CheckFileSanity(yaffs_Object *in)
3372 yaffs_Tags localTags;
3373 yaffs_Tags *tags = &localTags;
3377 if (in->variantType != YAFFS_OBJECT_TYPE_FILE)
3380 objId = in->objectId;
3381 fSize = in->variant.fileVariant.fileSize;
3383 (fSize + in->myDev->nDataBytesPerChunk - 1) / in->myDev->nDataBytesPerChunk;
3385 for (chunk = 1; chunk <= nChunks; chunk++) {
3386 tn = yaffs_FindLevel0Tnode(in->myDev, &in->variant.fileVariant,
3391 theChunk = yaffs_GetChunkGroupBase(dev, tn, chunk);
3393 if (yaffs_CheckChunkBits
3394 (dev, theChunk / dev->nChunksPerBlock,
3395 theChunk % dev->nChunksPerBlock)) {
3397 yaffs_ReadChunkTagsFromNAND(in->myDev, theChunk,
3401 (tags, in->objectId, chunk, chunkDeleted)) {
3411 /* T(("No level 0 found for %d\n", chunk)); */
3415 return failed ? YAFFS_FAIL : YAFFS_OK;
3420 static int yaffs_PutChunkIntoFile(yaffs_Object *in, int chunkInInode,
3421 int chunkInNAND, int inScan)
3423 /* NB inScan is zero unless scanning.
3424 * For forward scanning, inScan is > 0;
3425 * for backward scanning inScan is < 0
3429 yaffs_Device *dev = in->myDev;
3431 yaffs_ExtendedTags existingTags;
3432 yaffs_ExtendedTags newTags;
3433 unsigned existingSerial, newSerial;
3435 if (in->variantType != YAFFS_OBJECT_TYPE_FILE) {
3436 /* Just ignore an attempt at putting a chunk into a non-file during scanning
3437 * If it is not during Scanning then something went wrong!
3440 T(YAFFS_TRACE_ERROR,
3442 ("yaffs tragedy:attempt to put data chunk into a non-file"
3447 yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__);
3451 tn = yaffs_AddOrFindLevel0Tnode(dev,
3452 &in->variant.fileVariant,
3458 existingChunk = yaffs_GetChunkGroupBase(dev, tn, chunkInInode);
3461 /* If we're scanning then we need to test for duplicates
3462 * NB This does not need to be efficient since it should only ever
3463 * happen when the power fails during a write, then only one
3464 * chunk should ever be affected.
3466 * Correction for YAFFS2: This could happen quite a lot and we need to think about efficiency! TODO
3467 * Update: For backward scanning we don't need to re-read tags so this is quite cheap.
3470 if (existingChunk > 0) {
3471 /* NB Right now existing chunk will not be real chunkId if the device >= 32MB
3472 * thus we have to do a FindChunkInFile to get the real chunk id.
3474 * We have a duplicate now we need to decide which one to use:
3476 * Backwards scanning YAFFS2: The old one is what we use, dump the new one.
3477 * Forward scanning YAFFS2: The new one is what we use, dump the old one.
3478 * YAFFS1: Get both sets of tags and compare serial numbers.
3482 /* Only do this for forward scanning */
3483 yaffs_ReadChunkWithTagsFromNAND(dev,
3487 /* Do a proper find */
3489 yaffs_FindChunkInFile(in, chunkInInode,
3493 if (existingChunk <= 0) {
3494 /*Hoosterman - how did this happen? */
3496 T(YAFFS_TRACE_ERROR,
3498 ("yaffs tragedy: existing chunk < 0 in scan"
3503 /* NB The deleted flags should be false, otherwise the chunks will
3504 * not be loaded during a scan
3508 newSerial = newTags.serialNumber;
3509 existingSerial = existingTags.serialNumber;
3513 (in->myDev->isYaffs2 ||
3514 existingChunk <= 0 ||
3515 ((existingSerial + 1) & 3) == newSerial)) {
3516 /* Forward scanning.
3518 * Delete the old one and drop through to update the tnode
3520 yaffs_DeleteChunk(dev, existingChunk, 1,
3523 /* Backward scanning or we want to use the existing one
3525 * Delete the new one and return early so that the tnode isn't changed
3527 yaffs_DeleteChunk(dev, chunkInNAND, 1,
3535 if (existingChunk == 0)
3538 yaffs_PutLevel0Tnode(dev, tn, chunkInInode, chunkInNAND);
3543 static int yaffs_ReadChunkDataFromObject(yaffs_Object *in, int chunkInInode,
3546 int chunkInNAND = yaffs_FindChunkInFile(in, chunkInInode, NULL);
3548 if (chunkInNAND >= 0)
3549 return yaffs_ReadChunkWithTagsFromNAND(in->myDev, chunkInNAND,
3552 T(YAFFS_TRACE_NANDACCESS,
3553 (TSTR("Chunk %d not found zero instead" TENDSTR),
3555 /* get sane (zero) data if you read a hole */
3556 memset(buffer, 0, in->myDev->nDataBytesPerChunk);
3562 void yaffs_DeleteChunk(yaffs_Device *dev, int chunkId, int markNAND, int lyn)
3566 yaffs_ExtendedTags tags;
3567 yaffs_BlockInfo *bi;
3573 block = chunkId / dev->nChunksPerBlock;
3574 page = chunkId % dev->nChunksPerBlock;
3577 if (!yaffs_CheckChunkBit(dev, block, page))
3578 T(YAFFS_TRACE_VERIFY,
3579 (TSTR("Deleting invalid chunk %d"TENDSTR),
3582 bi = yaffs_GetBlockInfo(dev, block);
3584 T(YAFFS_TRACE_DELETION,
3585 (TSTR("line %d delete of chunk %d" TENDSTR), lyn, chunkId));
3588 bi->blockState != YAFFS_BLOCK_STATE_COLLECTING && !dev->isYaffs2) {
3590 yaffs_InitialiseTags(&tags);
3592 tags.chunkDeleted = 1;
3594 yaffs_WriteChunkWithTagsToNAND(dev, chunkId, NULL, &tags);
3595 yaffs_HandleUpdateChunk(dev, chunkId, &tags);
3597 dev->nUnmarkedDeletions++;
3600 /* Pull out of the management area.
3601 * If the whole block became dirty, this will kick off an erasure.
3603 if (bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING ||
3604 bi->blockState == YAFFS_BLOCK_STATE_FULL ||
3605 bi->blockState == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
3606 bi->blockState == YAFFS_BLOCK_STATE_COLLECTING) {
3609 yaffs_ClearChunkBit(dev, block, page);
3613 if (bi->pagesInUse == 0 &&
3614 !bi->hasShrinkHeader &&
3615 bi->blockState != YAFFS_BLOCK_STATE_ALLOCATING &&
3616 bi->blockState != YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
3617 yaffs_BlockBecameDirty(dev, block);
3624 static int yaffs_WriteChunkDataToObject(yaffs_Object *in, int chunkInInode,
3625 const __u8 *buffer, int nBytes,
3628 /* Find old chunk Need to do this to get serial number
3629 * Write new one and patch into tree.
3630 * Invalidate old tags.
3634 yaffs_ExtendedTags prevTags;
3637 yaffs_ExtendedTags newTags;
3639 yaffs_Device *dev = in->myDev;
3641 yaffs_CheckGarbageCollection(dev);
3643 /* Get the previous chunk at this location in the file if it exists */
3644 prevChunkId = yaffs_FindChunkInFile(in, chunkInInode, &prevTags);
3646 /* Set up new tags */
3647 yaffs_InitialiseTags(&newTags);
3649 newTags.chunkId = chunkInInode;
3650 newTags.objectId = in->objectId;
3651 newTags.serialNumber =
3652 (prevChunkId > 0) ? prevTags.serialNumber + 1 : 1;
3653 newTags.byteCount = nBytes;
3655 if (nBytes < 1 || nBytes > dev->totalBytesPerChunk) {
3656 T(YAFFS_TRACE_ERROR,
3657 (TSTR("Writing %d bytes to chunk!!!!!!!!!" TENDSTR), nBytes));
3662 yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &newTags,
3665 if (newChunkId >= 0) {
3666 yaffs_PutChunkIntoFile(in, chunkInInode, newChunkId, 0);
3668 if (prevChunkId > 0)
3669 yaffs_DeleteChunk(dev, prevChunkId, 1, __LINE__);
3671 yaffs_CheckFileSanity(in);
3677 /* UpdateObjectHeader updates the header on NAND for an object.
3678 * If name is not NULL, then that new name is used.
3680 int yaffs_UpdateObjectHeader(yaffs_Object *in, const YCHAR *name, int force,
3681 int isShrink, int shadows)
3684 yaffs_BlockInfo *bi;
3686 yaffs_Device *dev = in->myDev;
3693 yaffs_ExtendedTags newTags;
3694 yaffs_ExtendedTags oldTags;
3696 __u8 *buffer = NULL;
3697 YCHAR oldName[YAFFS_MAX_NAME_LENGTH + 1];
3699 yaffs_ObjectHeader *oh = NULL;
3701 yaffs_strcpy(oldName, _Y("silly old name"));
3705 in == dev->rootDir || /* The rootDir should also be saved */
3708 yaffs_CheckGarbageCollection(dev);
3709 yaffs_CheckObjectDetailsLoaded(in);
3711 buffer = yaffs_GetTempBuffer(in->myDev, __LINE__);
3712 oh = (yaffs_ObjectHeader *) buffer;
3714 prevChunkId = in->hdrChunk;
3716 if (prevChunkId > 0) {
3717 result = yaffs_ReadChunkWithTagsFromNAND(dev, prevChunkId,
3720 yaffs_VerifyObjectHeader(in, oh, &oldTags, 0);
3722 memcpy(oldName, oh->name, sizeof(oh->name));
3725 memset(buffer, 0xFF, dev->nDataBytesPerChunk);
3727 oh->type = in->variantType;
3728 oh->yst_mode = in->yst_mode;
3729 oh->shadowsObject = oh->inbandShadowsObject = shadows;
3731 #ifdef CONFIG_YAFFS_WINCE
3732 oh->win_atime[0] = in->win_atime[0];
3733 oh->win_ctime[0] = in->win_ctime[0];
3734 oh->win_mtime[0] = in->win_mtime[0];
3735 oh->win_atime[1] = in->win_atime[1];
3736 oh->win_ctime[1] = in->win_ctime[1];
3737 oh->win_mtime[1] = in->win_mtime[1];
3739 oh->yst_uid = in->yst_uid;
3740 oh->yst_gid = in->yst_gid;
3741 oh->yst_atime = in->yst_atime;
3742 oh->yst_mtime = in->yst_mtime;
3743 oh->yst_ctime = in->yst_ctime;
3744 oh->yst_rdev = in->yst_rdev;
3747 oh->parentObjectId = in->parent->objectId;
3749 oh->parentObjectId = 0;
3751 if (name && *name) {
3752 memset(oh->name, 0, sizeof(oh->name));
3753 yaffs_strncpy(oh->name, name, YAFFS_MAX_NAME_LENGTH);
3754 } else if (prevChunkId > 0)
3755 memcpy(oh->name, oldName, sizeof(oh->name));
3757 memset(oh->name, 0, sizeof(oh->name));
3759 oh->isShrink = isShrink;
3761 switch (in->variantType) {
3762 case YAFFS_OBJECT_TYPE_UNKNOWN:
3763 /* Should not happen */
3765 case YAFFS_OBJECT_TYPE_FILE:
3767 (oh->parentObjectId == YAFFS_OBJECTID_DELETED
3768 || oh->parentObjectId ==
3769 YAFFS_OBJECTID_UNLINKED) ? 0 : in->variant.
3770 fileVariant.fileSize;
3772 case YAFFS_OBJECT_TYPE_HARDLINK:
3773 oh->equivalentObjectId =
3774 in->variant.hardLinkVariant.equivalentObjectId;
3776 case YAFFS_OBJECT_TYPE_SPECIAL:
3779 case YAFFS_OBJECT_TYPE_DIRECTORY:
3782 case YAFFS_OBJECT_TYPE_SYMLINK:
3783 yaffs_strncpy(oh->alias,
3784 in->variant.symLinkVariant.alias,
3785 YAFFS_MAX_ALIAS_LENGTH);
3786 oh->alias[YAFFS_MAX_ALIAS_LENGTH] = 0;
3791 yaffs_InitialiseTags(&newTags);
3793 newTags.chunkId = 0;
3794 newTags.objectId = in->objectId;
3795 newTags.serialNumber = in->serial;
3797 /* Add extra info for file header */
3799 newTags.extraHeaderInfoAvailable = 1;
3800 newTags.extraParentObjectId = oh->parentObjectId;
3801 newTags.extraFileLength = oh->fileSize;
3802 newTags.extraIsShrinkHeader = oh->isShrink;
3803 newTags.extraEquivalentObjectId = oh->equivalentObjectId;
3804 newTags.extraShadows = (oh->shadowsObject > 0) ? 1 : 0;
3805 newTags.extraObjectType = in->variantType;
3807 yaffs_VerifyObjectHeader(in, oh, &newTags, 1);
3809 /* Create new chunk in NAND */
3811 yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &newTags,
3812 (prevChunkId > 0) ? 1 : 0);
3814 if (newChunkId >= 0) {
3816 in->hdrChunk = newChunkId;
3818 if (prevChunkId > 0) {
3819 yaffs_DeleteChunk(dev, prevChunkId, 1,
3823 if (!yaffs_ObjectHasCachedWriteData(in))
3826 /* If this was a shrink, then mark the block that the chunk lives on */
3828 bi = yaffs_GetBlockInfo(in->myDev,
3829 newChunkId / in->myDev->nChunksPerBlock);
3830 bi->hasShrinkHeader = 1;
3835 retVal = newChunkId;
3840 yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
3845 /*------------------------ Short Operations Cache ----------------------------------------
3846 * In many situations where there is no high level buffering (eg WinCE) a lot of
3847 * reads might be short sequential reads, and a lot of writes may be short
3848 * sequential writes. eg. scanning/writing a jpeg file.
3849 * In these cases, a short read/write cache can provide a huge perfomance benefit
3850 * with dumb-as-a-rock code.
3851 * In Linux, the page cache provides read buffering aand the short op cache provides write
3854 * There are a limited number (~10) of cache chunks per device so that we don't
3855 * need a very intelligent search.
3858 static int yaffs_ObjectHasCachedWriteData(yaffs_Object *obj)
3860 yaffs_Device *dev = obj->myDev;
3862 yaffs_ChunkCache *cache;
3863 int nCaches = obj->myDev->nShortOpCaches;
3865 for (i = 0; i < nCaches; i++) {
3866 cache = &dev->srCache[i];
3867 if (cache->object == obj &&
3876 static void yaffs_FlushFilesChunkCache(yaffs_Object *obj)
3878 yaffs_Device *dev = obj->myDev;
3879 int lowest = -99; /* Stop compiler whining. */
3881 yaffs_ChunkCache *cache;
3882 int chunkWritten = 0;
3883 int nCaches = obj->myDev->nShortOpCaches;
3889 /* Find the dirty cache for this object with the lowest chunk id. */
3890 for (i = 0; i < nCaches; i++) {
3891 if (dev->srCache[i].object == obj &&
3892 dev->srCache[i].dirty) {
3894 || dev->srCache[i].chunkId <
3896 cache = &dev->srCache[i];
3897 lowest = cache->chunkId;
3902 if (cache && !cache->locked) {
3903 /* Write it out and free it up */
3906 yaffs_WriteChunkDataToObject(cache->object,
3912 cache->object = NULL;
3915 } while (cache && chunkWritten > 0);
3918 /* Hoosterman, disk full while writing cache out. */
3919 T(YAFFS_TRACE_ERROR,
3920 (TSTR("yaffs tragedy: no space during cache write" TENDSTR)));
3927 /*yaffs_FlushEntireDeviceCache(dev)
3932 void yaffs_FlushEntireDeviceCache(yaffs_Device *dev)
3935 int nCaches = dev->nShortOpCaches;
3938 /* Find a dirty object in the cache and flush it...
3939 * until there are no further dirty objects.
3943 for (i = 0; i < nCaches && !obj; i++) {
3944 if (dev->srCache[i].object &&
3945 dev->srCache[i].dirty)
3946 obj = dev->srCache[i].object;
3950 yaffs_FlushFilesChunkCache(obj);
3957 /* Grab us a cache chunk for use.
3958 * First look for an empty one.
3959 * Then look for the least recently used non-dirty one.
3960 * Then look for the least recently used dirty one...., flush and look again.
3962 static yaffs_ChunkCache *yaffs_GrabChunkCacheWorker(yaffs_Device *dev)
3966 if (dev->nShortOpCaches > 0) {
3967 for (i = 0; i < dev->nShortOpCaches; i++) {
3968 if (!dev->srCache[i].object)
3969 return &dev->srCache[i];
3976 static yaffs_ChunkCache *yaffs_GrabChunkCache(yaffs_Device *dev)
3978 yaffs_ChunkCache *cache;
3979 yaffs_Object *theObj;
3984 if (dev->nShortOpCaches > 0) {
3985 /* Try find a non-dirty one... */
3987 cache = yaffs_GrabChunkCacheWorker(dev);
3990 /* They were all dirty, find the last recently used object and flush
3991 * its cache, then find again.
3992 * NB what's here is not very accurate, we actually flush the object
3993 * the last recently used page.
3996 /* With locking we can't assume we can use entry zero */
4003 for (i = 0; i < dev->nShortOpCaches; i++) {
4004 if (dev->srCache[i].object &&
4005 !dev->srCache[i].locked &&
4006 (dev->srCache[i].lastUse < usage || !cache)) {
4007 usage = dev->srCache[i].lastUse;
4008 theObj = dev->srCache[i].object;
4009 cache = &dev->srCache[i];
4014 if (!cache || cache->dirty) {
4015 /* Flush and try again */
4016 yaffs_FlushFilesChunkCache(theObj);
4017 cache = yaffs_GrabChunkCacheWorker(dev);
4027 /* Find a cached chunk */
4028 static yaffs_ChunkCache *yaffs_FindChunkCache(const yaffs_Object *obj,
4031 yaffs_Device *dev = obj->myDev;
4033 if (dev->nShortOpCaches > 0) {
4034 for (i = 0; i < dev->nShortOpCaches; i++) {
4035 if (dev->srCache[i].object == obj &&
4036 dev->srCache[i].chunkId == chunkId) {
4039 return &dev->srCache[i];
4046 /* Mark the chunk for the least recently used algorithym */
4047 static void yaffs_UseChunkCache(yaffs_Device *dev, yaffs_ChunkCache *cache,
4051 if (dev->nShortOpCaches > 0) {
4052 if (dev->srLastUse < 0 || dev->srLastUse > 100000000) {
4053 /* Reset the cache usages */
4055 for (i = 1; i < dev->nShortOpCaches; i++)
4056 dev->srCache[i].lastUse = 0;
4063 cache->lastUse = dev->srLastUse;
4070 /* Invalidate a single cache page.
4071 * Do this when a whole page gets written,
4072 * ie the short cache for this page is no longer valid.
4074 static void yaffs_InvalidateChunkCache(yaffs_Object *object, int chunkId)
4076 if (object->myDev->nShortOpCaches > 0) {
4077 yaffs_ChunkCache *cache = yaffs_FindChunkCache(object, chunkId);
4080 cache->object = NULL;
4084 /* Invalidate all the cache pages associated with this object
4085 * Do this whenever ther file is deleted or resized.
4087 static void yaffs_InvalidateWholeChunkCache(yaffs_Object *in)
4090 yaffs_Device *dev = in->myDev;
4092 if (dev->nShortOpCaches > 0) {
4093 /* Invalidate it. */
4094 for (i = 0; i < dev->nShortOpCaches; i++) {
4095 if (dev->srCache[i].object == in)
4096 dev->srCache[i].object = NULL;
4101 /*--------------------- Checkpointing --------------------*/
4104 static int yaffs_WriteCheckpointValidityMarker(yaffs_Device *dev, int head)
4106 yaffs_CheckpointValidity cp;
4108 memset(&cp, 0, sizeof(cp));
4110 cp.structType = sizeof(cp);
4111 cp.magic = YAFFS_MAGIC;
4112 cp.version = YAFFS_CHECKPOINT_VERSION;
4113 cp.head = (head) ? 1 : 0;
4115 return (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp)) ?
4119 static int yaffs_ReadCheckpointValidityMarker(yaffs_Device *dev, int head)
4121 yaffs_CheckpointValidity cp;
4124 ok = (yaffs_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp));
4127 ok = (cp.structType == sizeof(cp)) &&
4128 (cp.magic == YAFFS_MAGIC) &&
4129 (cp.version == YAFFS_CHECKPOINT_VERSION) &&
4130 (cp.head == ((head) ? 1 : 0));
4134 static void yaffs_DeviceToCheckpointDevice(yaffs_CheckpointDevice *cp,
4137 cp->nErasedBlocks = dev->nErasedBlocks;
4138 cp->allocationBlock = dev->allocationBlock;
4139 cp->allocationPage = dev->allocationPage;
4140 cp->nFreeChunks = dev->nFreeChunks;
4142 cp->nDeletedFiles = dev->nDeletedFiles;
4143 cp->nUnlinkedFiles = dev->nUnlinkedFiles;
4144 cp->nBackgroundDeletions = dev->nBackgroundDeletions;
4145 cp->sequenceNumber = dev->sequenceNumber;
4146 cp->oldestDirtySequence = dev->oldestDirtySequence;
4150 static void yaffs_CheckpointDeviceToDevice(yaffs_Device *dev,
4151 yaffs_CheckpointDevice *cp)
4153 dev->nErasedBlocks = cp->nErasedBlocks;
4154 dev->allocationBlock = cp->allocationBlock;
4155 dev->allocationPage = cp->allocationPage;
4156 dev->nFreeChunks = cp->nFreeChunks;
4158 dev->nDeletedFiles = cp->nDeletedFiles;
4159 dev->nUnlinkedFiles = cp->nUnlinkedFiles;
4160 dev->nBackgroundDeletions = cp->nBackgroundDeletions;
4161 dev->sequenceNumber = cp->sequenceNumber;
4162 dev->oldestDirtySequence = cp->oldestDirtySequence;
4166 static int yaffs_WriteCheckpointDevice(yaffs_Device *dev)
4168 yaffs_CheckpointDevice cp;
4170 __u32 nBlocks = (dev->internalEndBlock - dev->internalStartBlock + 1);
4174 /* Write device runtime values*/
4175 yaffs_DeviceToCheckpointDevice(&cp, dev);
4176 cp.structType = sizeof(cp);
4178 ok = (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp));
4180 /* Write block info */
4182 nBytes = nBlocks * sizeof(yaffs_BlockInfo);
4183 ok = (yaffs_CheckpointWrite(dev, dev->blockInfo, nBytes) == nBytes);
4186 /* Write chunk bits */
4188 nBytes = nBlocks * dev->chunkBitmapStride;
4189 ok = (yaffs_CheckpointWrite(dev, dev->chunkBits, nBytes) == nBytes);
4195 static int yaffs_ReadCheckpointDevice(yaffs_Device *dev)
4197 yaffs_CheckpointDevice cp;
4199 __u32 nBlocks = (dev->internalEndBlock - dev->internalStartBlock + 1);
4203 ok = (yaffs_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp));
4207 if (cp.structType != sizeof(cp))
4211 yaffs_CheckpointDeviceToDevice(dev, &cp);
4213 nBytes = nBlocks * sizeof(yaffs_BlockInfo);
4215 ok = (yaffs_CheckpointRead(dev, dev->blockInfo, nBytes) == nBytes);
4219 nBytes = nBlocks * dev->chunkBitmapStride;
4221 ok = (yaffs_CheckpointRead(dev, dev->chunkBits, nBytes) == nBytes);
4226 static void yaffs_ObjectToCheckpointObject(yaffs_CheckpointObject *cp,
4230 cp->objectId = obj->objectId;
4231 cp->parentId = (obj->parent) ? obj->parent->objectId : 0;
4232 cp->hdrChunk = obj->hdrChunk;
4233 cp->variantType = obj->variantType;
4234 cp->deleted = obj->deleted;
4235 cp->softDeleted = obj->softDeleted;
4236 cp->unlinked = obj->unlinked;
4237 cp->fake = obj->fake;
4238 cp->renameAllowed = obj->renameAllowed;
4239 cp->unlinkAllowed = obj->unlinkAllowed;
4240 cp->serial = obj->serial;
4241 cp->nDataChunks = obj->nDataChunks;
4243 if (obj->variantType == YAFFS_OBJECT_TYPE_FILE)
4244 cp->fileSizeOrEquivalentObjectId = obj->variant.fileVariant.fileSize;
4245 else if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK)
4246 cp->fileSizeOrEquivalentObjectId = obj->variant.hardLinkVariant.equivalentObjectId;
4249 static int yaffs_CheckpointObjectToObject(yaffs_Object *obj, yaffs_CheckpointObject *cp)
4252 yaffs_Object *parent;
4254 if (obj->variantType != cp->variantType) {
4255 T(YAFFS_TRACE_ERROR, (TSTR("Checkpoint read object %d type %d "
4256 TCONT("chunk %d does not match existing object type %d")
4257 TENDSTR), cp->objectId, cp->variantType, cp->hdrChunk,
4262 obj->objectId = cp->objectId;
4265 parent = yaffs_FindOrCreateObjectByNumber(
4268 YAFFS_OBJECT_TYPE_DIRECTORY);
4273 if (parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
4274 T(YAFFS_TRACE_ALWAYS, (TSTR("Checkpoint read object %d parent %d type %d"
4275 TCONT(" chunk %d Parent type, %d, not directory")
4277 cp->objectId, cp->parentId, cp->variantType,
4278 cp->hdrChunk, parent->variantType));
4281 yaffs_AddObjectToDirectory(parent, obj);
4284 obj->hdrChunk = cp->hdrChunk;
4285 obj->variantType = cp->variantType;
4286 obj->deleted = cp->deleted;
4287 obj->softDeleted = cp->softDeleted;
4288 obj->unlinked = cp->unlinked;
4289 obj->fake = cp->fake;
4290 obj->renameAllowed = cp->renameAllowed;
4291 obj->unlinkAllowed = cp->unlinkAllowed;
4292 obj->serial = cp->serial;
4293 obj->nDataChunks = cp->nDataChunks;
4295 if (obj->variantType == YAFFS_OBJECT_TYPE_FILE)
4296 obj->variant.fileVariant.fileSize = cp->fileSizeOrEquivalentObjectId;
4297 else if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK)
4298 obj->variant.hardLinkVariant.equivalentObjectId = cp->fileSizeOrEquivalentObjectId;
4300 if (obj->hdrChunk > 0)
4301 obj->lazyLoaded = 1;
4307 static int yaffs_CheckpointTnodeWorker(yaffs_Object *in, yaffs_Tnode *tn,
4308 __u32 level, int chunkOffset)
4311 yaffs_Device *dev = in->myDev;
4313 int tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
4315 if (tnodeSize < sizeof(yaffs_Tnode))
4316 tnodeSize = sizeof(yaffs_Tnode);
4322 for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++) {
4323 if (tn->internal[i]) {
4324 ok = yaffs_CheckpointTnodeWorker(in,
4327 (chunkOffset<<YAFFS_TNODES_INTERNAL_BITS) + i);
4330 } else if (level == 0) {
4331 __u32 baseOffset = chunkOffset << YAFFS_TNODES_LEVEL0_BITS;
4332 ok = (yaffs_CheckpointWrite(dev, &baseOffset, sizeof(baseOffset)) == sizeof(baseOffset));
4334 ok = (yaffs_CheckpointWrite(dev, tn, tnodeSize) == tnodeSize);
4342 static int yaffs_WriteCheckpointTnodes(yaffs_Object *obj)
4344 __u32 endMarker = ~0;
4347 if (obj->variantType == YAFFS_OBJECT_TYPE_FILE) {
4348 ok = yaffs_CheckpointTnodeWorker(obj,
4349 obj->variant.fileVariant.top,
4350 obj->variant.fileVariant.topLevel,
4353 ok = (yaffs_CheckpointWrite(obj->myDev, &endMarker, sizeof(endMarker)) ==
4360 static int yaffs_ReadCheckpointTnodes(yaffs_Object *obj)
4364 yaffs_Device *dev = obj->myDev;
4365 yaffs_FileStructure *fileStructPtr = &obj->variant.fileVariant;
4368 int tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
4370 if (tnodeSize < sizeof(yaffs_Tnode))
4371 tnodeSize = sizeof(yaffs_Tnode);
4373 ok = (yaffs_CheckpointRead(dev, &baseChunk, sizeof(baseChunk)) == sizeof(baseChunk));
4375 while (ok && (~baseChunk)) {
4377 /* Read level 0 tnode */
4380 tn = yaffs_GetTnodeRaw(dev);
4382 ok = (yaffs_CheckpointRead(dev, tn, tnodeSize) == tnodeSize);
4387 ok = yaffs_AddOrFindLevel0Tnode(dev,
4393 ok = (yaffs_CheckpointRead(dev, &baseChunk, sizeof(baseChunk)) == sizeof(baseChunk));
4397 T(YAFFS_TRACE_CHECKPOINT, (
4398 TSTR("Checkpoint read tnodes %d records, last %d. ok %d" TENDSTR),
4399 nread, baseChunk, ok));
4405 static int yaffs_WriteCheckpointObjects(yaffs_Device *dev)
4408 yaffs_CheckpointObject cp;
4411 struct ylist_head *lh;
4414 /* Iterate through the objects in each hash entry,
4415 * dumping them to the checkpointing stream.
4418 for (i = 0; ok && i < YAFFS_NOBJECT_BUCKETS; i++) {
4419 ylist_for_each(lh, &dev->objectBucket[i].list) {
4421 obj = ylist_entry(lh, yaffs_Object, hashLink);
4422 if (!obj->deferedFree) {
4423 yaffs_ObjectToCheckpointObject(&cp, obj);
4424 cp.structType = sizeof(cp);
4426 T(YAFFS_TRACE_CHECKPOINT, (
4427 TSTR("Checkpoint write object %d parent %d type %d chunk %d obj addr %x" TENDSTR),
4428 cp.objectId, cp.parentId, cp.variantType, cp.hdrChunk, (unsigned) obj));
4430 ok = (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp));
4432 if (ok && obj->variantType == YAFFS_OBJECT_TYPE_FILE)
4433 ok = yaffs_WriteCheckpointTnodes(obj);
4439 /* Dump end of list */
4440 memset(&cp, 0xFF, sizeof(yaffs_CheckpointObject));
4441 cp.structType = sizeof(cp);
4444 ok = (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp));
4449 static int yaffs_ReadCheckpointObjects(yaffs_Device *dev)
4452 yaffs_CheckpointObject cp;
4455 yaffs_Object *hardList = NULL;
4457 while (ok && !done) {
4458 ok = (yaffs_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp));
4459 if (cp.structType != sizeof(cp)) {
4460 T(YAFFS_TRACE_CHECKPOINT, (TSTR("struct size %d instead of %d ok %d"TENDSTR),
4461 cp.structType, sizeof(cp), ok));
4465 T(YAFFS_TRACE_CHECKPOINT, (TSTR("Checkpoint read object %d parent %d type %d chunk %d " TENDSTR),
4466 cp.objectId, cp.parentId, cp.variantType, cp.hdrChunk));
4468 if (ok && cp.objectId == ~0)
4471 obj = yaffs_FindOrCreateObjectByNumber(dev, cp.objectId, cp.variantType);
4473 ok = yaffs_CheckpointObjectToObject(obj, &cp);
4476 if (obj->variantType == YAFFS_OBJECT_TYPE_FILE) {
4477 ok = yaffs_ReadCheckpointTnodes(obj);
4478 } else if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) {
4479 obj->hardLinks.next =
4480 (struct ylist_head *) hardList;
4489 yaffs_HardlinkFixup(dev, hardList);
4494 static int yaffs_WriteCheckpointSum(yaffs_Device *dev)
4496 __u32 checkpointSum;
4499 yaffs_GetCheckpointSum(dev, &checkpointSum);
4501 ok = (yaffs_CheckpointWrite(dev, &checkpointSum, sizeof(checkpointSum)) == sizeof(checkpointSum));
4509 static int yaffs_ReadCheckpointSum(yaffs_Device *dev)
4511 __u32 checkpointSum0;
4512 __u32 checkpointSum1;
4515 yaffs_GetCheckpointSum(dev, &checkpointSum0);
4517 ok = (yaffs_CheckpointRead(dev, &checkpointSum1, sizeof(checkpointSum1)) == sizeof(checkpointSum1));
4522 if (checkpointSum0 != checkpointSum1)
4529 static int yaffs_WriteCheckpointData(yaffs_Device *dev)
4533 if (dev->skipCheckpointWrite || !dev->isYaffs2) {
4534 T(YAFFS_TRACE_CHECKPOINT, (TSTR("skipping checkpoint write" TENDSTR)));
4539 ok = yaffs_CheckpointOpen(dev, 1);
4542 T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint validity" TENDSTR)));
4543 ok = yaffs_WriteCheckpointValidityMarker(dev, 1);
4546 T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint device" TENDSTR)));
4547 ok = yaffs_WriteCheckpointDevice(dev);
4550 T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint objects" TENDSTR)));
4551 ok = yaffs_WriteCheckpointObjects(dev);
4554 T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint validity" TENDSTR)));
4555 ok = yaffs_WriteCheckpointValidityMarker(dev, 0);
4559 ok = yaffs_WriteCheckpointSum(dev);
4561 if (!yaffs_CheckpointClose(dev))
4565 dev->isCheckpointed = 1;
4567 dev->isCheckpointed = 0;
4569 return dev->isCheckpointed;
4572 static int yaffs_ReadCheckpointData(yaffs_Device *dev)
4576 if (dev->skipCheckpointRead || !dev->isYaffs2) {
4577 T(YAFFS_TRACE_CHECKPOINT, (TSTR("skipping checkpoint read" TENDSTR)));
4582 ok = yaffs_CheckpointOpen(dev, 0); /* open for read */
4585 T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint validity" TENDSTR)));
4586 ok = yaffs_ReadCheckpointValidityMarker(dev, 1);
4589 T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint device" TENDSTR)));
4590 ok = yaffs_ReadCheckpointDevice(dev);
4593 T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint objects" TENDSTR)));
4594 ok = yaffs_ReadCheckpointObjects(dev);
4597 T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint validity" TENDSTR)));
4598 ok = yaffs_ReadCheckpointValidityMarker(dev, 0);
4602 ok = yaffs_ReadCheckpointSum(dev);
4603 T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint checksum %d" TENDSTR), ok));
4606 if (!yaffs_CheckpointClose(dev))
4610 dev->isCheckpointed = 1;
4612 dev->isCheckpointed = 0;
4618 static void yaffs_InvalidateCheckpoint(yaffs_Device *dev)
4620 if (dev->isCheckpointed ||
4621 dev->blocksInCheckpoint > 0) {
4622 dev->isCheckpointed = 0;
4623 yaffs_CheckpointInvalidateStream(dev);
4624 if (dev->superBlock && dev->markSuperBlockDirty)
4625 dev->markSuperBlockDirty(dev->superBlock);
4630 int yaffs_CheckpointSave(yaffs_Device *dev)
4633 T(YAFFS_TRACE_CHECKPOINT, (TSTR("save entry: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
4635 yaffs_VerifyObjects(dev);
4636 yaffs_VerifyBlocks(dev);
4637 yaffs_VerifyFreeChunks(dev);
4639 if (!dev->isCheckpointed) {
4640 yaffs_InvalidateCheckpoint(dev);
4641 yaffs_WriteCheckpointData(dev);
4644 T(YAFFS_TRACE_ALWAYS, (TSTR("save exit: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
4646 return dev->isCheckpointed;
4649 int yaffs_CheckpointRestore(yaffs_Device *dev)
4652 T(YAFFS_TRACE_CHECKPOINT, (TSTR("restore entry: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
4654 retval = yaffs_ReadCheckpointData(dev);
4656 if (dev->isCheckpointed) {
4657 yaffs_VerifyObjects(dev);
4658 yaffs_VerifyBlocks(dev);
4659 yaffs_VerifyFreeChunks(dev);
4662 T(YAFFS_TRACE_CHECKPOINT, (TSTR("restore exit: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
4667 /*--------------------- File read/write ------------------------
4668 * Read and write have very similar structures.
4669 * In general the read/write has three parts to it
4670 * An incomplete chunk to start with (if the read/write is not chunk-aligned)
4671 * Some complete chunks
4672 * An incomplete chunk to end off with
4674 * Curve-balls: the first chunk might also be the last chunk.
4677 int yaffs_ReadDataFromFile(yaffs_Object *in, __u8 *buffer, loff_t offset,
4686 yaffs_ChunkCache *cache;
4693 /* chunk = offset / dev->nDataBytesPerChunk + 1; */
4694 /* start = offset % dev->nDataBytesPerChunk; */
4695 yaffs_AddrToChunk(dev, offset, &chunk, &start);
4698 /* OK now check for the curveball where the start and end are in
4701 if ((start + n) < dev->nDataBytesPerChunk)
4704 nToCopy = dev->nDataBytesPerChunk - start;
4706 cache = yaffs_FindChunkCache(in, chunk);
4708 /* If the chunk is already in the cache or it is less than a whole chunk
4709 * or we're using inband tags then use the cache (if there is caching)
4710 * else bypass the cache.
4712 if (cache || nToCopy != dev->nDataBytesPerChunk || dev->inbandTags) {
4713 if (dev->nShortOpCaches > 0) {
4715 /* If we can't find the data in the cache, then load it up. */
4718 cache = yaffs_GrabChunkCache(in->myDev);
4720 cache->chunkId = chunk;
4723 yaffs_ReadChunkDataFromObject(in, chunk,
4729 yaffs_UseChunkCache(dev, cache, 0);
4734 memcpy(buffer, &cache->data[start], nToCopy);
4738 /* Read into the local buffer then copy..*/
4741 yaffs_GetTempBuffer(dev, __LINE__);
4742 yaffs_ReadChunkDataFromObject(in, chunk,
4745 memcpy(buffer, &localBuffer[start], nToCopy);
4748 yaffs_ReleaseTempBuffer(dev, localBuffer,
4754 /* A full chunk. Read directly into the supplied buffer. */
4755 yaffs_ReadChunkDataFromObject(in, chunk, buffer);
4769 int yaffs_WriteDataToFile(yaffs_Object *in, const __u8 *buffer, loff_t offset,
4770 int nBytes, int writeThrough)
4779 int startOfWrite = offset;
4780 int chunkWritten = 0;
4788 while (n > 0 && chunkWritten >= 0) {
4789 /* chunk = offset / dev->nDataBytesPerChunk + 1; */
4790 /* start = offset % dev->nDataBytesPerChunk; */
4791 yaffs_AddrToChunk(dev, offset, &chunk, &start);
4793 if (chunk * dev->nDataBytesPerChunk + start != offset ||
4794 start >= dev->nDataBytesPerChunk) {
4795 T(YAFFS_TRACE_ERROR, (
4796 TSTR("AddrToChunk of offset %d gives chunk %d start %d"
4798 (int)offset, chunk, start));
4802 /* OK now check for the curveball where the start and end are in
4806 if ((start + n) < dev->nDataBytesPerChunk) {
4809 /* Now folks, to calculate how many bytes to write back....
4810 * If we're overwriting and not writing to then end of file then
4811 * we need to write back as much as was there before.
4814 chunkStart = ((chunk - 1) * dev->nDataBytesPerChunk);
4816 if (chunkStart > in->variant.fileVariant.fileSize)
4817 nBytesRead = 0; /* Past end of file */
4819 nBytesRead = in->variant.fileVariant.fileSize - chunkStart;
4821 if (nBytesRead > dev->nDataBytesPerChunk)
4822 nBytesRead = dev->nDataBytesPerChunk;
4826 (start + n)) ? nBytesRead : (start + n);
4828 if (nToWriteBack < 0 || nToWriteBack > dev->nDataBytesPerChunk)
4832 nToCopy = dev->nDataBytesPerChunk - start;
4833 nToWriteBack = dev->nDataBytesPerChunk;
4836 if (nToCopy != dev->nDataBytesPerChunk || dev->inbandTags) {
4837 /* An incomplete start or end chunk (or maybe both start and end chunk),
4838 * or we're using inband tags, so we want to use the cache buffers.
4840 if (dev->nShortOpCaches > 0) {
4841 yaffs_ChunkCache *cache;
4842 /* If we can't find the data in the cache, then load the cache */
4843 cache = yaffs_FindChunkCache(in, chunk);
4846 && yaffs_CheckSpaceForAllocation(in->
4848 cache = yaffs_GrabChunkCache(in->myDev);
4850 cache->chunkId = chunk;
4853 yaffs_ReadChunkDataFromObject(in, chunk,
4858 !yaffs_CheckSpaceForAllocation(in->myDev)) {
4859 /* Drop the cache if it was a read cache item and
4860 * no space check has been made for it.
4866 yaffs_UseChunkCache(dev, cache, 1);
4870 memcpy(&cache->data[start], buffer,
4875 cache->nBytes = nToWriteBack;
4879 yaffs_WriteChunkDataToObject
4882 cache->data, cache->nBytes,
4888 chunkWritten = -1; /* fail the write */
4891 /* An incomplete start or end chunk (or maybe both start and end chunk)
4892 * Read into the local buffer then copy, then copy over and write back.
4896 yaffs_GetTempBuffer(dev, __LINE__);
4898 yaffs_ReadChunkDataFromObject(in, chunk,
4903 memcpy(&localBuffer[start], buffer, nToCopy);
4906 yaffs_WriteChunkDataToObject(in, chunk,
4911 yaffs_ReleaseTempBuffer(dev, localBuffer,
4917 /* A full chunk. Write directly from the supplied buffer. */
4922 yaffs_WriteChunkDataToObject(in, chunk, buffer,
4923 dev->nDataBytesPerChunk,
4926 /* Since we've overwritten the cached data, we better invalidate it. */
4927 yaffs_InvalidateChunkCache(in, chunk);
4930 if (chunkWritten >= 0) {
4939 /* Update file object */
4941 if ((startOfWrite + nDone) > in->variant.fileVariant.fileSize)
4942 in->variant.fileVariant.fileSize = (startOfWrite + nDone);
4950 /* ---------------------- File resizing stuff ------------------ */
4952 static void yaffs_PruneResizedChunks(yaffs_Object *in, int newSize)
4955 yaffs_Device *dev = in->myDev;
4956 int oldFileSize = in->variant.fileVariant.fileSize;
4958 int lastDel = 1 + (oldFileSize - 1) / dev->nDataBytesPerChunk;
4960 int startDel = 1 + (newSize + dev->nDataBytesPerChunk - 1) /
4961 dev->nDataBytesPerChunk;
4965 /* Delete backwards so that we don't end up with holes if
4966 * power is lost part-way through the operation.
4968 for (i = lastDel; i >= startDel; i--) {
4969 /* NB this could be optimised somewhat,
4970 * eg. could retrieve the tags and write them without
4971 * using yaffs_DeleteChunk
4974 chunkId = yaffs_FindAndDeleteChunkInFile(in, i, NULL);
4977 (dev->internalStartBlock * dev->nChunksPerBlock)
4979 ((dev->internalEndBlock +
4980 1) * dev->nChunksPerBlock)) {
4981 T(YAFFS_TRACE_ALWAYS,
4982 (TSTR("Found daft chunkId %d for %d" TENDSTR),
4986 yaffs_DeleteChunk(dev, chunkId, 1, __LINE__);
4993 int yaffs_ResizeFile(yaffs_Object *in, loff_t newSize)
4996 int oldFileSize = in->variant.fileVariant.fileSize;
4997 __u32 newSizeOfPartialChunk;
5000 yaffs_Device *dev = in->myDev;
5002 yaffs_AddrToChunk(dev, newSize, &newFullChunks, &newSizeOfPartialChunk);
5004 yaffs_FlushFilesChunkCache(in);
5005 yaffs_InvalidateWholeChunkCache(in);
5007 yaffs_CheckGarbageCollection(dev);
5009 if (in->variantType != YAFFS_OBJECT_TYPE_FILE)
5012 if (newSize == oldFileSize)
5015 if (newSize < oldFileSize) {
5017 yaffs_PruneResizedChunks(in, newSize);
5019 if (newSizeOfPartialChunk != 0) {
5020 int lastChunk = 1 + newFullChunks;
5022 __u8 *localBuffer = yaffs_GetTempBuffer(dev, __LINE__);
5024 /* Got to read and rewrite the last chunk with its new size and zero pad */
5025 yaffs_ReadChunkDataFromObject(in, lastChunk,
5028 memset(localBuffer + newSizeOfPartialChunk, 0,
5029 dev->nDataBytesPerChunk - newSizeOfPartialChunk);
5031 yaffs_WriteChunkDataToObject(in, lastChunk, localBuffer,
5032 newSizeOfPartialChunk, 1);
5034 yaffs_ReleaseTempBuffer(dev, localBuffer, __LINE__);
5037 in->variant.fileVariant.fileSize = newSize;
5039 yaffs_PruneFileStructure(dev, &in->variant.fileVariant);
5041 /* newsSize > oldFileSize */
5042 in->variant.fileVariant.fileSize = newSize;
5046 /* Write a new object header to reflect the resize.
5047 * show we've shrunk the file, if need be
5048 * Do this only if the file is not in the deleted directories
5049 * and is not shadowed.
5053 in->parent->objectId != YAFFS_OBJECTID_UNLINKED &&
5054 in->parent->objectId != YAFFS_OBJECTID_DELETED)
5055 yaffs_UpdateObjectHeader(in, NULL, 0,
5056 (newSize < oldFileSize) ? 1 : 0, 0);
5061 loff_t yaffs_GetFileSize(yaffs_Object *obj)
5063 obj = yaffs_GetEquivalentObject(obj);
5065 switch (obj->variantType) {
5066 case YAFFS_OBJECT_TYPE_FILE:
5067 return obj->variant.fileVariant.fileSize;
5068 case YAFFS_OBJECT_TYPE_SYMLINK:
5069 return yaffs_strlen(obj->variant.symLinkVariant.alias);
5077 int yaffs_FlushFile(yaffs_Object *in, int updateTime, int dataSync)
5081 yaffs_FlushFilesChunkCache(in);
5082 if(dataSync) /* Only sync data */
5086 #ifdef CONFIG_YAFFS_WINCE
5087 yfsd_WinFileTimeNow(in->win_mtime);
5090 in->yst_mtime = Y_CURRENT_TIME;
5095 retVal = (yaffs_UpdateObjectHeader(in, NULL, 0, 0, 0) >=
5096 0) ? YAFFS_OK : YAFFS_FAIL;
5106 static int yaffs_DoGenericObjectDeletion(yaffs_Object *in)
5109 /* First off, invalidate the file's data in the cache, without flushing. */
5110 yaffs_InvalidateWholeChunkCache(in);
5112 if (in->myDev->isYaffs2 && (in->parent != in->myDev->deletedDir)) {
5113 /* Move to the unlinked directory so we have a record that it was deleted. */
5114 yaffs_ChangeObjectName(in, in->myDev->deletedDir, _Y("deleted"), 0, 0);
5118 yaffs_RemoveObjectFromDirectory(in);
5119 yaffs_DeleteChunk(in->myDev, in->hdrChunk, 1, __LINE__);
5122 yaffs_FreeObject(in);
5127 /* yaffs_DeleteFile deletes the whole file data
5128 * and the inode associated with the file.
5129 * It does not delete the links associated with the file.
5131 static int yaffs_UnlinkFileIfNeeded(yaffs_Object *in)
5135 int immediateDeletion = 0;
5139 immediateDeletion = 1;
5142 immediateDeletion = 1;
5145 if (immediateDeletion) {
5147 yaffs_ChangeObjectName(in, in->myDev->deletedDir,
5148 _Y("deleted"), 0, 0);
5149 T(YAFFS_TRACE_TRACING,
5150 (TSTR("yaffs: immediate deletion of file %d" TENDSTR),
5153 in->myDev->nDeletedFiles++;
5154 if (1 || in->myDev->isYaffs2)
5155 yaffs_ResizeFile(in, 0);
5156 yaffs_SoftDeleteFile(in);
5159 yaffs_ChangeObjectName(in, in->myDev->unlinkedDir,
5160 _Y("unlinked"), 0, 0);
5167 int yaffs_DeleteFile(yaffs_Object *in)
5169 int retVal = YAFFS_OK;
5170 int deleted = in->deleted;
5172 yaffs_ResizeFile(in, 0);
5174 if (in->nDataChunks > 0) {
5175 /* Use soft deletion if there is data in the file.
5176 * That won't be the case if it has been resized to zero.
5179 retVal = yaffs_UnlinkFileIfNeeded(in);
5181 if (retVal == YAFFS_OK && in->unlinked && !in->deleted) {
5184 in->myDev->nDeletedFiles++;
5185 yaffs_SoftDeleteFile(in);
5187 return deleted ? YAFFS_OK : YAFFS_FAIL;
5189 /* The file has no data chunks so we toss it immediately */
5190 yaffs_FreeTnode(in->myDev, in->variant.fileVariant.top);
5191 in->variant.fileVariant.top = NULL;
5192 yaffs_DoGenericObjectDeletion(in);
5198 static int yaffs_IsNonEmptyDirectory(yaffs_Object *obj)
5200 return (obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) &&
5201 !(ylist_empty(&obj->variant.directoryVariant.children));
5204 static int yaffs_DeleteDirectory(yaffs_Object *obj)
5206 /* First check that the directory is empty. */
5207 if (yaffs_IsNonEmptyDirectory(obj))
5210 return yaffs_DoGenericObjectDeletion(obj);
5213 static int yaffs_DeleteSymLink(yaffs_Object *in)
5215 YFREE(in->variant.symLinkVariant.alias);
5217 return yaffs_DoGenericObjectDeletion(in);
5220 static int yaffs_DeleteHardLink(yaffs_Object *in)
5222 /* remove this hardlink from the list assocaited with the equivalent
5225 ylist_del_init(&in->hardLinks);
5226 return yaffs_DoGenericObjectDeletion(in);
5229 int yaffs_DeleteObject(yaffs_Object *obj)
5232 switch (obj->variantType) {
5233 case YAFFS_OBJECT_TYPE_FILE:
5234 retVal = yaffs_DeleteFile(obj);
5236 case YAFFS_OBJECT_TYPE_DIRECTORY:
5237 return yaffs_DeleteDirectory(obj);
5239 case YAFFS_OBJECT_TYPE_SYMLINK:
5240 retVal = yaffs_DeleteSymLink(obj);
5242 case YAFFS_OBJECT_TYPE_HARDLINK:
5243 retVal = yaffs_DeleteHardLink(obj);
5245 case YAFFS_OBJECT_TYPE_SPECIAL:
5246 retVal = yaffs_DoGenericObjectDeletion(obj);
5248 case YAFFS_OBJECT_TYPE_UNKNOWN:
5250 break; /* should not happen. */
5256 static int yaffs_UnlinkWorker(yaffs_Object *obj)
5259 int immediateDeletion = 0;
5263 immediateDeletion = 1;
5265 if (obj->inUse <= 0)
5266 immediateDeletion = 1;
5270 yaffs_UpdateParent(obj->parent);
5272 if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) {
5273 return yaffs_DeleteHardLink(obj);
5274 } else if (!ylist_empty(&obj->hardLinks)) {
5275 /* Curve ball: We're unlinking an object that has a hardlink.
5277 * This problem arises because we are not strictly following
5278 * The Linux link/inode model.
5280 * We can't really delete the object.
5281 * Instead, we do the following:
5282 * - Select a hardlink.
5283 * - Unhook it from the hard links
5284 * - Unhook it from its parent directory (so that the rename can work)
5285 * - Rename the object to the hardlink's name.
5286 * - Delete the hardlink
5291 YCHAR name[YAFFS_MAX_NAME_LENGTH + 1];
5293 hl = ylist_entry(obj->hardLinks.next, yaffs_Object, hardLinks);
5295 ylist_del_init(&hl->hardLinks);
5296 ylist_del_init(&hl->siblings);
5298 yaffs_GetObjectName(hl, name, YAFFS_MAX_NAME_LENGTH + 1);
5300 retVal = yaffs_ChangeObjectName(obj, hl->parent, name, 0, 0);
5302 if (retVal == YAFFS_OK)
5303 retVal = yaffs_DoGenericObjectDeletion(hl);
5307 } else if (immediateDeletion) {
5308 switch (obj->variantType) {
5309 case YAFFS_OBJECT_TYPE_FILE:
5310 return yaffs_DeleteFile(obj);
5312 case YAFFS_OBJECT_TYPE_DIRECTORY:
5313 return yaffs_DeleteDirectory(obj);
5315 case YAFFS_OBJECT_TYPE_SYMLINK:
5316 return yaffs_DeleteSymLink(obj);
5318 case YAFFS_OBJECT_TYPE_SPECIAL:
5319 return yaffs_DoGenericObjectDeletion(obj);
5321 case YAFFS_OBJECT_TYPE_HARDLINK:
5322 case YAFFS_OBJECT_TYPE_UNKNOWN:
5326 } else if(yaffs_IsNonEmptyDirectory(obj))
5329 return yaffs_ChangeObjectName(obj, obj->myDev->unlinkedDir,
5330 _Y("unlinked"), 0, 0);
5334 static int yaffs_UnlinkObject(yaffs_Object *obj)
5337 if (obj && obj->unlinkAllowed)
5338 return yaffs_UnlinkWorker(obj);
5343 int yaffs_Unlink(yaffs_Object *dir, const YCHAR *name)
5347 obj = yaffs_FindObjectByName(dir, name);
5348 return yaffs_UnlinkObject(obj);
5351 /*----------------------- Initialisation Scanning ---------------------- */
5353 static void yaffs_HandleShadowedObject(yaffs_Device *dev, int objId,
5354 int backwardScanning)
5358 if (!backwardScanning) {
5359 /* Handle YAFFS1 forward scanning case
5360 * For YAFFS1 we always do the deletion
5364 /* Handle YAFFS2 case (backward scanning)
5365 * If the shadowed object exists then ignore.
5367 obj = yaffs_FindObjectByNumber(dev, objId);
5372 /* Let's create it (if it does not exist) assuming it is a file so that it can do shrinking etc.
5373 * We put it in unlinked dir to be cleaned up after the scanning
5376 yaffs_FindOrCreateObjectByNumber(dev, objId,
5377 YAFFS_OBJECT_TYPE_FILE);
5380 obj->isShadowed = 1;
5381 yaffs_AddObjectToDirectory(dev->unlinkedDir, obj);
5382 obj->variant.fileVariant.shrinkSize = 0;
5383 obj->valid = 1; /* So that we don't read any other info for this file */
5393 static void yaffs_HardlinkFixup(yaffs_Device *dev, yaffs_Object *hardList)
5400 hardList = (yaffs_Object *) (hardList->hardLinks.next);
5402 in = yaffs_FindObjectByNumber(dev,
5403 hl->variant.hardLinkVariant.
5404 equivalentObjectId);
5407 /* Add the hardlink pointers */
5408 hl->variant.hardLinkVariant.equivalentObject = in;
5409 ylist_add(&hl->hardLinks, &in->hardLinks);
5411 /* Todo Need to report/handle this better.
5412 * Got a problem... hardlink to a non-existant object
5414 hl->variant.hardLinkVariant.equivalentObject = NULL;
5415 YINIT_LIST_HEAD(&hl->hardLinks);
5425 static int ybicmp(const void *a, const void *b)
5427 register int aseq = ((yaffs_BlockIndex *)a)->seq;
5428 register int bseq = ((yaffs_BlockIndex *)b)->seq;
5429 register int ablock = ((yaffs_BlockIndex *)a)->block;
5430 register int bblock = ((yaffs_BlockIndex *)b)->block;
5432 return ablock - bblock;
5438 struct yaffs_ShadowFixerStruct {
5441 struct yaffs_ShadowFixerStruct *next;
5445 static void yaffs_StripDeletedObjects(yaffs_Device *dev)
5448 * Sort out state of unlinked and deleted objects after scanning.
5450 struct ylist_head *i;
5451 struct ylist_head *n;
5454 /* Soft delete all the unlinked files */
5455 ylist_for_each_safe(i, n,
5456 &dev->unlinkedDir->variant.directoryVariant.children) {
5458 l = ylist_entry(i, yaffs_Object, siblings);
5459 yaffs_DeleteObject(l);
5463 ylist_for_each_safe(i, n,
5464 &dev->deletedDir->variant.directoryVariant.children) {
5466 l = ylist_entry(i, yaffs_Object, siblings);
5467 yaffs_DeleteObject(l);
5474 * This code iterates through all the objects making sure that they are rooted.
5475 * Any unrooted objects are re-rooted in lost+found.
5476 * An object needs to be in one of:
5477 * - Directly under deleted, unlinked
5478 * - Directly or indirectly under root.
5481 * This code assumes that we don't ever change the current relationships between
5483 * rootDir->parent == unlinkedDir->parent == deletedDir->parent == NULL
5484 * lostNfound->parent == rootDir
5486 * This fixes the problem where directories might have inadvertently been deleted
5487 * leaving the object "hanging" without being rooted in the directory tree.
5490 static int yaffs_HasNULLParent(yaffs_Device *dev, yaffs_Object *obj)
5492 return (obj == dev->deletedDir ||
5493 obj == dev->unlinkedDir||
5494 obj == dev->rootDir);
5497 static void yaffs_FixHangingObjects(yaffs_Device *dev)
5500 yaffs_Object *parent;
5502 struct ylist_head *lh;
5503 struct ylist_head *n;
5508 /* Iterate through the objects in each hash entry,
5509 * looking at each object.
5510 * Make sure it is rooted.
5513 for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
5514 ylist_for_each_safe(lh, n, &dev->objectBucket[i].list) {
5516 obj = ylist_entry(lh, yaffs_Object, hashLink);
5517 parent= obj->parent;
5519 if(yaffs_HasNULLParent(dev,obj)){
5520 /* These directories are not hanging */
5523 else if(!parent || parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
5525 else if(yaffs_HasNULLParent(dev,parent))
5529 * Need to follow the parent chain to see if it is hanging.
5534 while(parent != dev->rootDir &&
5536 parent->parent->variantType == YAFFS_OBJECT_TYPE_DIRECTORY &&
5538 parent = parent->parent;
5541 if(parent != dev->rootDir)
5546 (TSTR("Hanging object %d moved to lost and found" TENDSTR),
5548 yaffs_AddObjectToDirectory(dev->lostNFoundDir,obj);
5557 * Delete directory contents for cleaning up lost and found.
5559 static void yaffs_DeleteDirectoryContents(yaffs_Object *dir)
5562 struct ylist_head *lh;
5563 struct ylist_head *n;
5565 if(dir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
5568 ylist_for_each_safe(lh, n, &dir->variant.directoryVariant.children) {
5570 obj = ylist_entry(lh, yaffs_Object, siblings);
5571 if(obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY)
5572 yaffs_DeleteDirectoryContents(obj);
5575 (TSTR("Deleting lost_found object %d" TENDSTR),
5578 /* Need to use UnlinkObject since Delete would not handle
5579 * hardlinked objects correctly.
5581 yaffs_UnlinkObject(obj);
5587 static void yaffs_EmptyLostAndFound(yaffs_Device *dev)
5589 yaffs_DeleteDirectoryContents(dev->lostNFoundDir);
5592 static int yaffs_Scan(yaffs_Device *dev)
5594 yaffs_ExtendedTags tags;
5604 yaffs_BlockState state;
5605 yaffs_Object *hardList = NULL;
5606 yaffs_BlockInfo *bi;
5607 __u32 sequenceNumber;
5608 yaffs_ObjectHeader *oh;
5610 yaffs_Object *parent;
5612 int alloc_failed = 0;
5614 struct yaffs_ShadowFixerStruct *shadowFixerList = NULL;
5622 (TSTR("yaffs_Scan starts intstartblk %d intendblk %d..." TENDSTR),
5623 dev->internalStartBlock, dev->internalEndBlock));
5625 chunkData = yaffs_GetTempBuffer(dev, __LINE__);
5627 dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER;
5629 /* Scan all the blocks to determine their state */
5630 for (blk = dev->internalStartBlock; blk <= dev->internalEndBlock; blk++) {
5631 bi = yaffs_GetBlockInfo(dev, blk);
5632 yaffs_ClearChunkBits(dev, blk);
5634 bi->softDeletions = 0;
5636 yaffs_QueryInitialBlockState(dev, blk, &state, &sequenceNumber);
5638 bi->blockState = state;
5639 bi->sequenceNumber = sequenceNumber;
5641 if (bi->sequenceNumber == YAFFS_SEQUENCE_BAD_BLOCK)
5642 bi->blockState = state = YAFFS_BLOCK_STATE_DEAD;
5644 T(YAFFS_TRACE_SCAN_DEBUG,
5645 (TSTR("Block scanning block %d state %d seq %d" TENDSTR), blk,
5646 state, sequenceNumber));
5648 if (state == YAFFS_BLOCK_STATE_DEAD) {
5649 T(YAFFS_TRACE_BAD_BLOCKS,
5650 (TSTR("block %d is bad" TENDSTR), blk));
5651 } else if (state == YAFFS_BLOCK_STATE_EMPTY) {
5652 T(YAFFS_TRACE_SCAN_DEBUG,
5653 (TSTR("Block empty " TENDSTR)));
5654 dev->nErasedBlocks++;
5655 dev->nFreeChunks += dev->nChunksPerBlock;
5659 startIterator = dev->internalStartBlock;
5660 endIterator = dev->internalEndBlock;
5662 /* For each block.... */
5663 for (blockIterator = startIterator; !alloc_failed && blockIterator <= endIterator;
5670 blk = blockIterator;
5672 bi = yaffs_GetBlockInfo(dev, blk);
5673 state = bi->blockState;
5677 /* For each chunk in each block that needs scanning....*/
5678 for (c = 0; !alloc_failed && c < dev->nChunksPerBlock &&
5679 state == YAFFS_BLOCK_STATE_NEEDS_SCANNING; c++) {
5680 /* Read the tags and decide what to do */
5681 chunk = blk * dev->nChunksPerBlock + c;
5683 result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk, NULL,
5686 /* Let's have a good look at this chunk... */
5688 if (tags.eccResult == YAFFS_ECC_RESULT_UNFIXED || tags.chunkDeleted) {
5694 /*T((" %d %d deleted\n",blk,c)); */
5695 } else if (!tags.chunkUsed) {
5696 /* An unassigned chunk in the block
5697 * This means that either the block is empty or
5698 * this is the one being allocated from
5702 /* We're looking at the first chunk in the block so the block is unused */
5703 state = YAFFS_BLOCK_STATE_EMPTY;
5704 dev->nErasedBlocks++;
5706 /* this is the block being allocated from */
5709 (" Allocating from %d %d" TENDSTR),
5711 state = YAFFS_BLOCK_STATE_ALLOCATING;
5712 dev->allocationBlock = blk;
5713 dev->allocationPage = c;
5714 dev->allocationBlockFinder = blk;
5715 /* Set it to here to encourage the allocator to go forth from here. */
5719 dev->nFreeChunks += (dev->nChunksPerBlock - c);
5720 } else if (tags.chunkId > 0) {
5721 /* chunkId > 0 so it is a data chunk... */
5722 unsigned int endpos;
5724 yaffs_SetChunkBit(dev, blk, c);
5727 in = yaffs_FindOrCreateObjectByNumber(dev,
5730 YAFFS_OBJECT_TYPE_FILE);
5731 /* PutChunkIntoFile checks for a clash (two data chunks with
5732 * the same chunkId).
5739 if (!yaffs_PutChunkIntoFile(in, tags.chunkId, chunk, 1))
5744 (tags.chunkId - 1) * dev->nDataBytesPerChunk +
5747 in->variantType == YAFFS_OBJECT_TYPE_FILE
5748 && in->variant.fileVariant.scannedFileSize <
5750 in->variant.fileVariant.
5751 scannedFileSize = endpos;
5752 if (!dev->useHeaderFileSize) {
5753 in->variant.fileVariant.
5755 in->variant.fileVariant.
5760 /* T((" %d %d data %d %d\n",blk,c,tags.objectId,tags.chunkId)); */
5762 /* chunkId == 0, so it is an ObjectHeader.
5763 * Thus, we read in the object header and make the object
5765 yaffs_SetChunkBit(dev, blk, c);
5768 result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk,
5772 oh = (yaffs_ObjectHeader *) chunkData;
5774 in = yaffs_FindObjectByNumber(dev,
5776 if (in && in->variantType != oh->type) {
5777 /* This should not happen, but somehow
5778 * Wev'e ended up with an objectId that has been reused but not yet
5779 * deleted, and worse still it has changed type. Delete the old object.
5782 yaffs_DeleteObject(in);
5787 in = yaffs_FindOrCreateObjectByNumber(dev,
5795 if (in && oh->shadowsObject > 0) {
5797 struct yaffs_ShadowFixerStruct *fixer;
5798 fixer = YMALLOC(sizeof(struct yaffs_ShadowFixerStruct));
5800 fixer->next = shadowFixerList;
5801 shadowFixerList = fixer;
5802 fixer->objectId = tags.objectId;
5803 fixer->shadowedId = oh->shadowsObject;
5808 if (in && in->valid) {
5809 /* We have already filled this one. We have a duplicate and need to resolve it. */
5811 unsigned existingSerial = in->serial;
5812 unsigned newSerial = tags.serialNumber;
5814 if (((existingSerial + 1) & 3) == newSerial) {
5815 /* Use new one - destroy the exisiting one */
5816 yaffs_DeleteChunk(dev,
5821 /* Use existing - destroy this one. */
5822 yaffs_DeleteChunk(dev, chunk, 1,
5827 if (in && !in->valid &&
5828 (tags.objectId == YAFFS_OBJECTID_ROOT ||
5829 tags.objectId == YAFFS_OBJECTID_LOSTNFOUND)) {
5830 /* We only load some info, don't fiddle with directory structure */
5832 in->variantType = oh->type;
5834 in->yst_mode = oh->yst_mode;
5835 #ifdef CONFIG_YAFFS_WINCE
5836 in->win_atime[0] = oh->win_atime[0];
5837 in->win_ctime[0] = oh->win_ctime[0];
5838 in->win_mtime[0] = oh->win_mtime[0];
5839 in->win_atime[1] = oh->win_atime[1];
5840 in->win_ctime[1] = oh->win_ctime[1];
5841 in->win_mtime[1] = oh->win_mtime[1];
5843 in->yst_uid = oh->yst_uid;
5844 in->yst_gid = oh->yst_gid;
5845 in->yst_atime = oh->yst_atime;
5846 in->yst_mtime = oh->yst_mtime;
5847 in->yst_ctime = oh->yst_ctime;
5848 in->yst_rdev = oh->yst_rdev;
5850 in->hdrChunk = chunk;
5851 in->serial = tags.serialNumber;
5853 } else if (in && !in->valid) {
5854 /* we need to load this info */
5857 in->variantType = oh->type;
5859 in->yst_mode = oh->yst_mode;
5860 #ifdef CONFIG_YAFFS_WINCE
5861 in->win_atime[0] = oh->win_atime[0];
5862 in->win_ctime[0] = oh->win_ctime[0];
5863 in->win_mtime[0] = oh->win_mtime[0];
5864 in->win_atime[1] = oh->win_atime[1];
5865 in->win_ctime[1] = oh->win_ctime[1];
5866 in->win_mtime[1] = oh->win_mtime[1];
5868 in->yst_uid = oh->yst_uid;
5869 in->yst_gid = oh->yst_gid;
5870 in->yst_atime = oh->yst_atime;
5871 in->yst_mtime = oh->yst_mtime;
5872 in->yst_ctime = oh->yst_ctime;
5873 in->yst_rdev = oh->yst_rdev;
5875 in->hdrChunk = chunk;
5876 in->serial = tags.serialNumber;
5878 yaffs_SetObjectName(in, oh->name);
5881 /* directory stuff...
5886 yaffs_FindOrCreateObjectByNumber
5887 (dev, oh->parentObjectId,
5888 YAFFS_OBJECT_TYPE_DIRECTORY);
5891 if (parent && parent->variantType ==
5892 YAFFS_OBJECT_TYPE_UNKNOWN) {
5893 /* Set up as a directory */
5894 parent->variantType =
5895 YAFFS_OBJECT_TYPE_DIRECTORY;
5896 YINIT_LIST_HEAD(&parent->variant.
5899 } else if (!parent || parent->variantType !=
5900 YAFFS_OBJECT_TYPE_DIRECTORY) {
5901 /* Hoosterman, another problem....
5902 * We're trying to use a non-directory as a directory
5905 T(YAFFS_TRACE_ERROR,
5907 ("yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found."
5909 parent = dev->lostNFoundDir;
5912 yaffs_AddObjectToDirectory(parent, in);
5914 if (0 && (parent == dev->deletedDir ||
5915 parent == dev->unlinkedDir)) {
5916 in->deleted = 1; /* If it is unlinked at start up then it wants deleting */
5917 dev->nDeletedFiles++;
5919 /* Note re hardlinks.
5920 * Since we might scan a hardlink before its equivalent object is scanned
5921 * we put them all in a list.
5922 * After scanning is complete, we should have all the objects, so we run through this
5923 * list and fix up all the chains.
5926 switch (in->variantType) {
5927 case YAFFS_OBJECT_TYPE_UNKNOWN:
5928 /* Todo got a problem */
5930 case YAFFS_OBJECT_TYPE_FILE:
5931 if (dev->useHeaderFileSize)
5933 in->variant.fileVariant.
5938 case YAFFS_OBJECT_TYPE_HARDLINK:
5939 in->variant.hardLinkVariant.
5940 equivalentObjectId =
5941 oh->equivalentObjectId;
5942 in->hardLinks.next =
5943 (struct ylist_head *)
5947 case YAFFS_OBJECT_TYPE_DIRECTORY:
5950 case YAFFS_OBJECT_TYPE_SPECIAL:
5953 case YAFFS_OBJECT_TYPE_SYMLINK:
5954 in->variant.symLinkVariant.alias =
5955 yaffs_CloneString(oh->alias);
5956 if (!in->variant.symLinkVariant.alias)
5962 if (parent == dev->deletedDir) {
5963 yaffs_DestroyObject(in);
5964 bi->hasShrinkHeader = 1;
5971 if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
5972 /* If we got this far while scanning, then the block is fully allocated.*/
5973 state = YAFFS_BLOCK_STATE_FULL;
5976 bi->blockState = state;
5978 /* Now let's see if it was dirty */
5979 if (bi->pagesInUse == 0 &&
5980 !bi->hasShrinkHeader &&
5981 bi->blockState == YAFFS_BLOCK_STATE_FULL) {
5982 yaffs_BlockBecameDirty(dev, blk);
5988 /* Ok, we've done all the scanning.
5989 * Fix up the hard link chains.
5990 * We should now have scanned all the objects, now it's time to add these
5994 yaffs_HardlinkFixup(dev, hardList);
5996 /* Fix up any shadowed objects */
5998 struct yaffs_ShadowFixerStruct *fixer;
6001 while (shadowFixerList) {
6002 fixer = shadowFixerList;
6003 shadowFixerList = fixer->next;
6004 /* Complete the rename transaction by deleting the shadowed object
6005 * then setting the object header to unshadowed.
6007 obj = yaffs_FindObjectByNumber(dev, fixer->shadowedId);
6009 yaffs_DeleteObject(obj);
6011 obj = yaffs_FindObjectByNumber(dev, fixer->objectId);
6014 yaffs_UpdateObjectHeader(obj, NULL, 1, 0, 0);
6020 yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
6025 T(YAFFS_TRACE_SCAN, (TSTR("yaffs_Scan ends" TENDSTR)));
6031 static void yaffs_CheckObjectDetailsLoaded(yaffs_Object *in)
6034 yaffs_ObjectHeader *oh;
6036 yaffs_ExtendedTags tags;
6038 int alloc_failed = 0;
6046 T(YAFFS_TRACE_SCAN, (TSTR("details for object %d %s loaded" TENDSTR),
6048 in->lazyLoaded ? "not yet" : "already"));
6051 if (in->lazyLoaded && in->hdrChunk > 0) {
6053 chunkData = yaffs_GetTempBuffer(dev, __LINE__);
6055 result = yaffs_ReadChunkWithTagsFromNAND(dev, in->hdrChunk, chunkData, &tags);
6056 oh = (yaffs_ObjectHeader *) chunkData;
6058 in->yst_mode = oh->yst_mode;
6059 #ifdef CONFIG_YAFFS_WINCE
6060 in->win_atime[0] = oh->win_atime[0];
6061 in->win_ctime[0] = oh->win_ctime[0];
6062 in->win_mtime[0] = oh->win_mtime[0];
6063 in->win_atime[1] = oh->win_atime[1];
6064 in->win_ctime[1] = oh->win_ctime[1];
6065 in->win_mtime[1] = oh->win_mtime[1];
6067 in->yst_uid = oh->yst_uid;
6068 in->yst_gid = oh->yst_gid;
6069 in->yst_atime = oh->yst_atime;
6070 in->yst_mtime = oh->yst_mtime;
6071 in->yst_ctime = oh->yst_ctime;
6072 in->yst_rdev = oh->yst_rdev;
6075 yaffs_SetObjectName(in, oh->name);
6077 if (in->variantType == YAFFS_OBJECT_TYPE_SYMLINK) {
6078 in->variant.symLinkVariant.alias =
6079 yaffs_CloneString(oh->alias);
6080 if (!in->variant.symLinkVariant.alias)
6081 alloc_failed = 1; /* Not returned to caller */
6084 yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
6088 static int yaffs_ScanBackwards(yaffs_Device *dev)
6090 yaffs_ExtendedTags tags;
6095 int nBlocksToScan = 0;
6101 yaffs_BlockState state;
6102 yaffs_Object *hardList = NULL;
6103 yaffs_BlockInfo *bi;
6104 __u32 sequenceNumber;
6105 yaffs_ObjectHeader *oh;
6107 yaffs_Object *parent;
6108 int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1;
6114 int foundChunksInBlock;
6115 int equivalentObjectId;
6116 int alloc_failed = 0;
6119 yaffs_BlockIndex *blockIndex = NULL;
6120 int altBlockIndex = 0;
6122 if (!dev->isYaffs2) {
6124 (TSTR("yaffs_ScanBackwards is only for YAFFS2!" TENDSTR)));
6130 ("yaffs_ScanBackwards starts intstartblk %d intendblk %d..."
6131 TENDSTR), dev->internalStartBlock, dev->internalEndBlock));
6134 dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER;
6136 blockIndex = YMALLOC(nBlocks * sizeof(yaffs_BlockIndex));
6139 blockIndex = YMALLOC_ALT(nBlocks * sizeof(yaffs_BlockIndex));
6145 (TSTR("yaffs_Scan() could not allocate block index!" TENDSTR)));
6149 dev->blocksInCheckpoint = 0;
6151 chunkData = yaffs_GetTempBuffer(dev, __LINE__);
6153 /* Scan all the blocks to determine their state */
6154 for (blk = dev->internalStartBlock; blk <= dev->internalEndBlock; blk++) {
6155 bi = yaffs_GetBlockInfo(dev, blk);
6156 yaffs_ClearChunkBits(dev, blk);
6158 bi->softDeletions = 0;
6160 yaffs_QueryInitialBlockState(dev, blk, &state, &sequenceNumber);
6162 bi->blockState = state;
6163 bi->sequenceNumber = sequenceNumber;
6165 if (bi->sequenceNumber == YAFFS_SEQUENCE_CHECKPOINT_DATA)
6166 bi->blockState = state = YAFFS_BLOCK_STATE_CHECKPOINT;
6167 if (bi->sequenceNumber == YAFFS_SEQUENCE_BAD_BLOCK)
6168 bi->blockState = state = YAFFS_BLOCK_STATE_DEAD;
6170 T(YAFFS_TRACE_SCAN_DEBUG,
6171 (TSTR("Block scanning block %d state %d seq %d" TENDSTR), blk,
6172 state, sequenceNumber));
6175 if (state == YAFFS_BLOCK_STATE_CHECKPOINT) {
6176 dev->blocksInCheckpoint++;
6178 } else if (state == YAFFS_BLOCK_STATE_DEAD) {
6179 T(YAFFS_TRACE_BAD_BLOCKS,
6180 (TSTR("block %d is bad" TENDSTR), blk));
6181 } else if (state == YAFFS_BLOCK_STATE_EMPTY) {
6182 T(YAFFS_TRACE_SCAN_DEBUG,
6183 (TSTR("Block empty " TENDSTR)));
6184 dev->nErasedBlocks++;
6185 dev->nFreeChunks += dev->nChunksPerBlock;
6186 } else if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
6188 /* Determine the highest sequence number */
6189 if (sequenceNumber >= YAFFS_LOWEST_SEQUENCE_NUMBER &&
6190 sequenceNumber < YAFFS_HIGHEST_SEQUENCE_NUMBER) {
6192 blockIndex[nBlocksToScan].seq = sequenceNumber;
6193 blockIndex[nBlocksToScan].block = blk;
6197 if (sequenceNumber >= dev->sequenceNumber)
6198 dev->sequenceNumber = sequenceNumber;
6200 /* TODO: Nasty sequence number! */
6203 ("Block scanning block %d has bad sequence number %d"
6204 TENDSTR), blk, sequenceNumber));
6211 (TSTR("%d blocks to be sorted..." TENDSTR), nBlocksToScan));
6217 /* Sort the blocks */
6218 #ifndef CONFIG_YAFFS_USE_OWN_SORT
6220 /* Use qsort now. */
6221 yaffs_qsort(blockIndex, nBlocksToScan, sizeof(yaffs_BlockIndex), ybicmp);
6225 /* Dungy old bubble sort... */
6227 yaffs_BlockIndex temp;
6231 for (i = 0; i < nBlocksToScan; i++)
6232 for (j = i + 1; j < nBlocksToScan; j++)
6233 if (blockIndex[i].seq > blockIndex[j].seq) {
6234 temp = blockIndex[j];
6235 blockIndex[j] = blockIndex[i];
6236 blockIndex[i] = temp;
6243 T(YAFFS_TRACE_SCAN, (TSTR("...done" TENDSTR)));
6245 /* Now scan the blocks looking at the data. */
6247 endIterator = nBlocksToScan - 1;
6248 T(YAFFS_TRACE_SCAN_DEBUG,
6249 (TSTR("%d blocks to be scanned" TENDSTR), nBlocksToScan));
6251 /* For each block.... backwards */
6252 for (blockIterator = endIterator; !alloc_failed && blockIterator >= startIterator;
6254 /* Cooperative multitasking! This loop can run for so
6255 long that watchdog timers expire. */
6258 /* get the block to scan in the correct order */
6259 blk = blockIndex[blockIterator].block;
6261 bi = yaffs_GetBlockInfo(dev, blk);
6264 state = bi->blockState;
6268 /* For each chunk in each block that needs scanning.... */
6269 foundChunksInBlock = 0;
6270 for (c = dev->nChunksPerBlock - 1;
6271 !alloc_failed && c >= 0 &&
6272 (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
6273 state == YAFFS_BLOCK_STATE_ALLOCATING); c--) {
6274 /* Scan backwards...
6275 * Read the tags and decide what to do
6278 chunk = blk * dev->nChunksPerBlock + c;
6280 result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk, NULL,
6283 /* Let's have a good look at this chunk... */
6285 if (!tags.chunkUsed) {
6286 /* An unassigned chunk in the block.
6287 * If there are used chunks after this one, then
6288 * it is a chunk that was skipped due to failing the erased
6289 * check. Just skip it so that it can be deleted.
6290 * But, more typically, We get here when this is an unallocated
6291 * chunk and his means that either the block is empty or
6292 * this is the one being allocated from
6295 if (foundChunksInBlock) {
6296 /* This is a chunk that was skipped due to failing the erased check */
6297 } else if (c == 0) {
6298 /* We're looking at the first chunk in the block so the block is unused */
6299 state = YAFFS_BLOCK_STATE_EMPTY;
6300 dev->nErasedBlocks++;
6302 if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
6303 state == YAFFS_BLOCK_STATE_ALLOCATING) {
6304 if (dev->sequenceNumber == bi->sequenceNumber) {
6305 /* this is the block being allocated from */
6309 (" Allocating from %d %d"
6312 state = YAFFS_BLOCK_STATE_ALLOCATING;
6313 dev->allocationBlock = blk;
6314 dev->allocationPage = c;
6315 dev->allocationBlockFinder = blk;
6317 /* This is a partially written block that is not
6318 * the current allocation block. This block must have
6319 * had a write failure, so set up for retirement.
6322 /* bi->needsRetiring = 1; ??? TODO */
6323 bi->gcPrioritise = 1;
6325 T(YAFFS_TRACE_ALWAYS,
6326 (TSTR("Partially written block %d detected" TENDSTR),
6334 } else if (tags.eccResult == YAFFS_ECC_RESULT_UNFIXED) {
6336 (TSTR(" Unfixed ECC in chunk(%d:%d), chunk ignored"TENDSTR),
6341 } else if (tags.chunkId > 0) {
6342 /* chunkId > 0 so it is a data chunk... */
6343 unsigned int endpos;
6345 (tags.chunkId - 1) * dev->nDataBytesPerChunk;
6347 foundChunksInBlock = 1;
6350 yaffs_SetChunkBit(dev, blk, c);
6353 in = yaffs_FindOrCreateObjectByNumber(dev,
6356 YAFFS_OBJECT_TYPE_FILE);
6363 in->variantType == YAFFS_OBJECT_TYPE_FILE
6365 in->variant.fileVariant.shrinkSize) {
6366 /* This has not been invalidated by a resize */
6367 if (!yaffs_PutChunkIntoFile(in, tags.chunkId,
6372 /* File size is calculated by looking at the data chunks if we have not
6373 * seen an object header yet. Stop this practice once we find an object header.
6377 1) * dev->nDataBytesPerChunk +
6380 if (!in->valid && /* have not got an object header yet */
6381 in->variant.fileVariant.
6382 scannedFileSize < endpos) {
6383 in->variant.fileVariant.
6384 scannedFileSize = endpos;
6385 in->variant.fileVariant.
6387 in->variant.fileVariant.
6392 /* This chunk has been invalidated by a resize, so delete */
6393 yaffs_DeleteChunk(dev, chunk, 1, __LINE__);
6397 /* chunkId == 0, so it is an ObjectHeader.
6398 * Thus, we read in the object header and make the object
6400 foundChunksInBlock = 1;
6402 yaffs_SetChunkBit(dev, blk, c);
6408 if (tags.extraHeaderInfoAvailable) {
6409 in = yaffs_FindOrCreateObjectByNumber
6410 (dev, tags.objectId,
6411 tags.extraObjectType);
6417 (!in->valid && dev->disableLazyLoad) ||
6418 tags.extraShadows ||
6420 (tags.objectId == YAFFS_OBJECTID_ROOT ||
6421 tags.objectId == YAFFS_OBJECTID_LOSTNFOUND))) {
6423 /* If we don't have valid info then we need to read the chunk
6424 * TODO In future we can probably defer reading the chunk and
6425 * living with invalid data until needed.
6428 result = yaffs_ReadChunkWithTagsFromNAND(dev,
6433 oh = (yaffs_ObjectHeader *) chunkData;
6435 if (dev->inbandTags) {
6436 /* Fix up the header if they got corrupted by inband tags */
6437 oh->shadowsObject = oh->inbandShadowsObject;
6438 oh->isShrink = oh->inbandIsShrink;
6442 in = yaffs_FindOrCreateObjectByNumber(dev, tags.objectId, oh->type);
6450 /* TODO Hoosterman we have a problem! */
6451 T(YAFFS_TRACE_ERROR,
6453 ("yaffs tragedy: Could not make object for object %d at chunk %d during scan"
6454 TENDSTR), tags.objectId, chunk));
6459 /* We have already filled this one.
6460 * We have a duplicate that will be discarded, but
6461 * we first have to suck out resize info if it is a file.
6464 if ((in->variantType == YAFFS_OBJECT_TYPE_FILE) &&
6466 oh->type == YAFFS_OBJECT_TYPE_FILE) ||
6467 (tags.extraHeaderInfoAvailable &&
6468 tags.extraObjectType == YAFFS_OBJECT_TYPE_FILE))) {
6470 (oh) ? oh->fileSize : tags.
6472 __u32 parentObjectId =
6474 parentObjectId : tags.
6475 extraParentObjectId;
6479 (oh) ? oh->isShrink : tags.
6480 extraIsShrinkHeader;
6482 /* If it is deleted (unlinked at start also means deleted)
6483 * we treat the file size as being zeroed at this point.
6485 if (parentObjectId ==
6486 YAFFS_OBJECTID_DELETED
6487 || parentObjectId ==
6488 YAFFS_OBJECTID_UNLINKED) {
6494 in->variant.fileVariant.
6495 shrinkSize > thisSize) {
6496 in->variant.fileVariant.
6502 bi->hasShrinkHeader = 1;
6505 /* Use existing - destroy this one. */
6506 yaffs_DeleteChunk(dev, chunk, 1, __LINE__);
6510 if (!in->valid && in->variantType !=
6511 (oh ? oh->type : tags.extraObjectType))
6512 T(YAFFS_TRACE_ERROR, (
6513 TSTR("yaffs tragedy: Bad object type, "
6514 TCONT("%d != %d, for object %d at chunk ")
6515 TCONT("%d during scan")
6517 oh->type : tags.extraObjectType,
6518 in->variantType, tags.objectId,
6522 (tags.objectId == YAFFS_OBJECTID_ROOT ||
6524 YAFFS_OBJECTID_LOSTNFOUND)) {
6525 /* We only load some info, don't fiddle with directory structure */
6529 in->variantType = oh->type;
6531 in->yst_mode = oh->yst_mode;
6532 #ifdef CONFIG_YAFFS_WINCE
6533 in->win_atime[0] = oh->win_atime[0];
6534 in->win_ctime[0] = oh->win_ctime[0];
6535 in->win_mtime[0] = oh->win_mtime[0];
6536 in->win_atime[1] = oh->win_atime[1];
6537 in->win_ctime[1] = oh->win_ctime[1];
6538 in->win_mtime[1] = oh->win_mtime[1];
6540 in->yst_uid = oh->yst_uid;
6541 in->yst_gid = oh->yst_gid;
6542 in->yst_atime = oh->yst_atime;
6543 in->yst_mtime = oh->yst_mtime;
6544 in->yst_ctime = oh->yst_ctime;
6545 in->yst_rdev = oh->yst_rdev;
6549 in->variantType = tags.extraObjectType;
6553 in->hdrChunk = chunk;
6555 } else if (!in->valid) {
6556 /* we need to load this info */
6559 in->hdrChunk = chunk;
6562 in->variantType = oh->type;
6564 in->yst_mode = oh->yst_mode;
6565 #ifdef CONFIG_YAFFS_WINCE
6566 in->win_atime[0] = oh->win_atime[0];
6567 in->win_ctime[0] = oh->win_ctime[0];
6568 in->win_mtime[0] = oh->win_mtime[0];
6569 in->win_atime[1] = oh->win_atime[1];
6570 in->win_ctime[1] = oh->win_ctime[1];
6571 in->win_mtime[1] = oh->win_mtime[1];
6573 in->yst_uid = oh->yst_uid;
6574 in->yst_gid = oh->yst_gid;
6575 in->yst_atime = oh->yst_atime;
6576 in->yst_mtime = oh->yst_mtime;
6577 in->yst_ctime = oh->yst_ctime;
6578 in->yst_rdev = oh->yst_rdev;
6581 if (oh->shadowsObject > 0)
6582 yaffs_HandleShadowedObject(dev,
6588 yaffs_SetObjectName(in, oh->name);
6590 yaffs_FindOrCreateObjectByNumber
6591 (dev, oh->parentObjectId,
6592 YAFFS_OBJECT_TYPE_DIRECTORY);
6594 fileSize = oh->fileSize;
6595 isShrink = oh->isShrink;
6596 equivalentObjectId = oh->equivalentObjectId;
6599 in->variantType = tags.extraObjectType;
6601 yaffs_FindOrCreateObjectByNumber
6602 (dev, tags.extraParentObjectId,
6603 YAFFS_OBJECT_TYPE_DIRECTORY);
6604 fileSize = tags.extraFileLength;
6605 isShrink = tags.extraIsShrinkHeader;
6606 equivalentObjectId = tags.extraEquivalentObjectId;
6615 /* directory stuff...
6619 if (parent && parent->variantType ==
6620 YAFFS_OBJECT_TYPE_UNKNOWN) {
6621 /* Set up as a directory */
6622 parent->variantType =
6623 YAFFS_OBJECT_TYPE_DIRECTORY;
6624 YINIT_LIST_HEAD(&parent->variant.
6627 } else if (!parent || parent->variantType !=
6628 YAFFS_OBJECT_TYPE_DIRECTORY) {
6629 /* Hoosterman, another problem....
6630 * We're trying to use a non-directory as a directory
6633 T(YAFFS_TRACE_ERROR,
6635 ("yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found."
6637 parent = dev->lostNFoundDir;
6640 yaffs_AddObjectToDirectory(parent, in);
6642 itsUnlinked = (parent == dev->deletedDir) ||
6643 (parent == dev->unlinkedDir);
6646 /* Mark the block as having a shrinkHeader */
6647 bi->hasShrinkHeader = 1;
6650 /* Note re hardlinks.
6651 * Since we might scan a hardlink before its equivalent object is scanned
6652 * we put them all in a list.
6653 * After scanning is complete, we should have all the objects, so we run
6654 * through this list and fix up all the chains.
6657 switch (in->variantType) {
6658 case YAFFS_OBJECT_TYPE_UNKNOWN:
6659 /* Todo got a problem */
6661 case YAFFS_OBJECT_TYPE_FILE:
6663 if (in->variant.fileVariant.
6664 scannedFileSize < fileSize) {
6665 /* This covers the case where the file size is greater
6666 * than where the data is
6667 * This will happen if the file is resized to be larger
6668 * than its current data extents.
6670 in->variant.fileVariant.fileSize = fileSize;
6671 in->variant.fileVariant.scannedFileSize =
6672 in->variant.fileVariant.fileSize;
6676 in->variant.fileVariant.shrinkSize > fileSize) {
6677 in->variant.fileVariant.shrinkSize = fileSize;
6681 case YAFFS_OBJECT_TYPE_HARDLINK:
6683 in->variant.hardLinkVariant.equivalentObjectId =
6685 in->hardLinks.next =
6686 (struct ylist_head *) hardList;
6690 case YAFFS_OBJECT_TYPE_DIRECTORY:
6693 case YAFFS_OBJECT_TYPE_SPECIAL:
6696 case YAFFS_OBJECT_TYPE_SYMLINK:
6698 in->variant.symLinkVariant.alias =
6699 yaffs_CloneString(oh->alias);
6700 if (!in->variant.symLinkVariant.alias)
6710 } /* End of scanning for each chunk */
6712 if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
6713 /* If we got this far while scanning, then the block is fully allocated. */
6714 state = YAFFS_BLOCK_STATE_FULL;
6717 bi->blockState = state;
6719 /* Now let's see if it was dirty */
6720 if (bi->pagesInUse == 0 &&
6721 !bi->hasShrinkHeader &&
6722 bi->blockState == YAFFS_BLOCK_STATE_FULL) {
6723 yaffs_BlockBecameDirty(dev, blk);
6729 YFREE_ALT(blockIndex);
6733 /* Ok, we've done all the scanning.
6734 * Fix up the hard link chains.
6735 * We should now have scanned all the objects, now it's time to add these
6738 yaffs_HardlinkFixup(dev, hardList);
6741 yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
6746 T(YAFFS_TRACE_SCAN, (TSTR("yaffs_ScanBackwards ends" TENDSTR)));
6751 /*------------------------------ Directory Functions ----------------------------- */
6753 static void yaffs_VerifyObjectInDirectory(yaffs_Object *obj)
6755 struct ylist_head *lh;
6756 yaffs_Object *listObj;
6761 T(YAFFS_TRACE_ALWAYS, (TSTR("No object to verify" TENDSTR)));
6766 if (yaffs_SkipVerification(obj->myDev))
6770 T(YAFFS_TRACE_ALWAYS, (TSTR("Object does not have parent" TENDSTR)));
6775 if (obj->parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
6776 T(YAFFS_TRACE_ALWAYS, (TSTR("Parent is not directory" TENDSTR)));
6780 /* Iterate through the objects in each hash entry */
6782 ylist_for_each(lh, &obj->parent->variant.directoryVariant.children) {
6784 listObj = ylist_entry(lh, yaffs_Object, siblings);
6785 yaffs_VerifyObject(listObj);
6792 T(YAFFS_TRACE_ALWAYS, (TSTR("Object in directory %d times" TENDSTR), count));
6797 static void yaffs_VerifyDirectory(yaffs_Object *directory)
6799 struct ylist_head *lh;
6800 yaffs_Object *listObj;
6807 if (yaffs_SkipFullVerification(directory->myDev))
6810 if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
6811 T(YAFFS_TRACE_ALWAYS, (TSTR("Directory has wrong type: %d" TENDSTR), directory->variantType));
6815 /* Iterate through the objects in each hash entry */
6817 ylist_for_each(lh, &directory->variant.directoryVariant.children) {
6819 listObj = ylist_entry(lh, yaffs_Object, siblings);
6820 if (listObj->parent != directory) {
6821 T(YAFFS_TRACE_ALWAYS, (TSTR("Object in directory list has wrong parent %p" TENDSTR), listObj->parent));
6824 yaffs_VerifyObjectInDirectory(listObj);
6830 *yaffs_UpdateParent() handles fixing a directories mtime and ctime when a new
6831 * link (ie. name) is created or deleted in the directory.
6834 * create dir/a : update dir's mtime/ctime
6835 * rm dir/a: update dir's mtime/ctime
6836 * modify dir/a: don't update dir's mtimme/ctime
6839 static void yaffs_UpdateParent(yaffs_Object *obj)
6845 obj->yst_mtime = obj->yst_ctime = Y_CURRENT_TIME;
6847 yaffs_UpdateObjectHeader(obj,NULL,0,0,0);
6850 static void yaffs_RemoveObjectFromDirectory(yaffs_Object *obj)
6852 yaffs_Device *dev = obj->myDev;
6853 yaffs_Object *parent;
6855 yaffs_VerifyObjectInDirectory(obj);
6856 parent = obj->parent;
6858 yaffs_VerifyDirectory(parent);
6860 if (dev && dev->removeObjectCallback)
6861 dev->removeObjectCallback(obj);
6864 ylist_del_init(&obj->siblings);
6867 yaffs_VerifyDirectory(parent);
6870 static void yaffs_AddObjectToDirectory(yaffs_Object *directory,
6874 T(YAFFS_TRACE_ALWAYS,
6876 ("tragedy: Trying to add an object to a null pointer directory"
6881 if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
6882 T(YAFFS_TRACE_ALWAYS,
6884 ("tragedy: Trying to add an object to a non-directory"
6889 if (obj->siblings.prev == NULL) {
6890 /* Not initialised */
6895 yaffs_VerifyDirectory(directory);
6897 yaffs_RemoveObjectFromDirectory(obj);
6901 ylist_add(&obj->siblings, &directory->variant.directoryVariant.children);
6902 obj->parent = directory;
6904 if (directory == obj->myDev->unlinkedDir
6905 || directory == obj->myDev->deletedDir) {
6907 obj->myDev->nUnlinkedFiles++;
6908 obj->renameAllowed = 0;
6911 yaffs_VerifyDirectory(directory);
6912 yaffs_VerifyObjectInDirectory(obj);
6915 yaffs_Object *yaffs_FindObjectByName(yaffs_Object *directory,
6920 struct ylist_head *i;
6921 YCHAR buffer[YAFFS_MAX_NAME_LENGTH + 1];
6929 T(YAFFS_TRACE_ALWAYS,
6931 ("tragedy: yaffs_FindObjectByName: null pointer directory"
6936 if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
6937 T(YAFFS_TRACE_ALWAYS,
6939 ("tragedy: yaffs_FindObjectByName: non-directory" TENDSTR)));
6943 sum = yaffs_CalcNameSum(name);
6945 ylist_for_each(i, &directory->variant.directoryVariant.children) {
6947 l = ylist_entry(i, yaffs_Object, siblings);
6949 if (l->parent != directory)
6952 yaffs_CheckObjectDetailsLoaded(l);
6954 /* Special case for lost-n-found */
6955 if (l->objectId == YAFFS_OBJECTID_LOSTNFOUND) {
6956 if (yaffs_strcmp(name, YAFFS_LOSTNFOUND_NAME) == 0)
6958 } else if (yaffs_SumCompare(l->sum, sum) || l->hdrChunk <= 0) {
6959 /* LostnFound chunk called Objxxx
6962 yaffs_GetObjectName(l, buffer,
6963 YAFFS_MAX_NAME_LENGTH + 1);
6964 if (yaffs_strncmp(name, buffer, YAFFS_MAX_NAME_LENGTH) == 0)
6975 int yaffs_ApplyToDirectoryChildren(yaffs_Object *theDir,
6976 int (*fn) (yaffs_Object *))
6978 struct ylist_head *i;
6982 T(YAFFS_TRACE_ALWAYS,
6984 ("tragedy: yaffs_FindObjectByName: null pointer directory"
6989 if (theDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
6990 T(YAFFS_TRACE_ALWAYS,
6992 ("tragedy: yaffs_FindObjectByName: non-directory" TENDSTR)));
6997 ylist_for_each(i, &theDir->variant.directoryVariant.children) {
6999 l = ylist_entry(i, yaffs_Object, siblings);
7010 /* GetEquivalentObject dereferences any hard links to get to the
7014 yaffs_Object *yaffs_GetEquivalentObject(yaffs_Object *obj)
7016 if (obj && obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) {
7017 /* We want the object id of the equivalent object, not this one */
7018 obj = obj->variant.hardLinkVariant.equivalentObject;
7019 yaffs_CheckObjectDetailsLoaded(obj);
7024 int yaffs_GetObjectName(yaffs_Object *obj, YCHAR *name, int buffSize)
7026 memset(name, 0, buffSize * sizeof(YCHAR));
7028 yaffs_CheckObjectDetailsLoaded(obj);
7030 if (obj->objectId == YAFFS_OBJECTID_LOSTNFOUND) {
7031 yaffs_strncpy(name, YAFFS_LOSTNFOUND_NAME, buffSize - 1);
7032 } else if (obj->hdrChunk <= 0) {
7034 YCHAR numString[20];
7035 YCHAR *x = &numString[19];
7036 unsigned v = obj->objectId;
7040 *x = '0' + (v % 10);
7043 /* make up a name */
7044 yaffs_strcpy(locName, YAFFS_LOSTNFOUND_PREFIX);
7045 yaffs_strcat(locName, x);
7046 yaffs_strncpy(name, locName, buffSize - 1);
7049 #ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM
7050 else if (obj->shortName[0])
7051 yaffs_strcpy(name, obj->shortName);
7055 __u8 *buffer = yaffs_GetTempBuffer(obj->myDev, __LINE__);
7057 yaffs_ObjectHeader *oh = (yaffs_ObjectHeader *) buffer;
7059 memset(buffer, 0, obj->myDev->nDataBytesPerChunk);
7061 if (obj->hdrChunk > 0) {
7062 result = yaffs_ReadChunkWithTagsFromNAND(obj->myDev,
7063 obj->hdrChunk, buffer,
7066 yaffs_strncpy(name, oh->name, buffSize - 1);
7068 yaffs_ReleaseTempBuffer(obj->myDev, buffer, __LINE__);
7071 return yaffs_strlen(name);
7074 int yaffs_GetObjectFileLength(yaffs_Object *obj)
7076 /* Dereference any hard linking */
7077 obj = yaffs_GetEquivalentObject(obj);
7079 if (obj->variantType == YAFFS_OBJECT_TYPE_FILE)
7080 return obj->variant.fileVariant.fileSize;
7081 if (obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK)
7082 return yaffs_strlen(obj->variant.symLinkVariant.alias);
7084 /* Only a directory should drop through to here */
7085 return obj->myDev->nDataBytesPerChunk;
7089 int yaffs_GetObjectLinkCount(yaffs_Object *obj)
7092 struct ylist_head *i;
7095 count++; /* the object itself */
7097 ylist_for_each(i, &obj->hardLinks)
7098 count++; /* add the hard links; */
7103 int yaffs_GetObjectInode(yaffs_Object *obj)
7105 obj = yaffs_GetEquivalentObject(obj);
7107 return obj->objectId;
7110 unsigned yaffs_GetObjectType(yaffs_Object *obj)
7112 obj = yaffs_GetEquivalentObject(obj);
7114 switch (obj->variantType) {
7115 case YAFFS_OBJECT_TYPE_FILE:
7118 case YAFFS_OBJECT_TYPE_DIRECTORY:
7121 case YAFFS_OBJECT_TYPE_SYMLINK:
7124 case YAFFS_OBJECT_TYPE_HARDLINK:
7127 case YAFFS_OBJECT_TYPE_SPECIAL:
7128 if (S_ISFIFO(obj->yst_mode))
7130 if (S_ISCHR(obj->yst_mode))
7132 if (S_ISBLK(obj->yst_mode))
7134 if (S_ISSOCK(obj->yst_mode))
7142 YCHAR *yaffs_GetSymlinkAlias(yaffs_Object *obj)
7144 obj = yaffs_GetEquivalentObject(obj);
7145 if (obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK)
7146 return yaffs_CloneString(obj->variant.symLinkVariant.alias);
7148 return yaffs_CloneString(_Y(""));
7151 #ifndef CONFIG_YAFFS_WINCE
7153 int yaffs_SetAttributes(yaffs_Object *obj, struct iattr *attr)
7155 unsigned int valid = attr->ia_valid;
7157 if (valid & ATTR_MODE)
7158 obj->yst_mode = attr->ia_mode;
7159 if (valid & ATTR_UID)
7160 obj->yst_uid = attr->ia_uid;
7161 if (valid & ATTR_GID)
7162 obj->yst_gid = attr->ia_gid;
7164 if (valid & ATTR_ATIME)
7165 obj->yst_atime = Y_TIME_CONVERT(attr->ia_atime);
7166 if (valid & ATTR_CTIME)
7167 obj->yst_ctime = Y_TIME_CONVERT(attr->ia_ctime);
7168 if (valid & ATTR_MTIME)
7169 obj->yst_mtime = Y_TIME_CONVERT(attr->ia_mtime);
7171 if (valid & ATTR_SIZE)
7172 yaffs_ResizeFile(obj, attr->ia_size);
7174 yaffs_UpdateObjectHeader(obj, NULL, 1, 0, 0);
7179 int yaffs_GetAttributes(yaffs_Object *obj, struct iattr *attr)
7181 unsigned int valid = 0;
7183 attr->ia_mode = obj->yst_mode;
7185 attr->ia_uid = obj->yst_uid;
7187 attr->ia_gid = obj->yst_gid;
7190 Y_TIME_CONVERT(attr->ia_atime) = obj->yst_atime;
7191 valid |= ATTR_ATIME;
7192 Y_TIME_CONVERT(attr->ia_ctime) = obj->yst_ctime;
7193 valid |= ATTR_CTIME;
7194 Y_TIME_CONVERT(attr->ia_mtime) = obj->yst_mtime;
7195 valid |= ATTR_MTIME;
7197 attr->ia_size = yaffs_GetFileSize(obj);
7200 attr->ia_valid = valid;
7208 int yaffs_DumpObject(yaffs_Object *obj)
7212 yaffs_GetObjectName(obj, name, YAFFS_MAX_NAME_LENGTH + 1);
7214 T(YAFFS_TRACE_ALWAYS,
7216 ("Object %d, inode %d \"%s\"\n dirty %d valid %d serial %d sum %d"
7217 " chunk %d type %d size %d\n"
7218 TENDSTR), obj->objectId, yaffs_GetObjectInode(obj), name,
7219 obj->dirty, obj->valid, obj->serial, obj->sum, obj->hdrChunk,
7220 yaffs_GetObjectType(obj), yaffs_GetObjectFileLength(obj)));
7226 /*---------------------------- Initialisation code -------------------------------------- */
7228 static int yaffs_CheckDevFunctions(const yaffs_Device *dev)
7231 /* Common functions, gotta have */
7232 if (!dev->eraseBlockInNAND || !dev->initialiseNAND)
7235 #ifdef CONFIG_YAFFS_YAFFS2
7237 /* Can use the "with tags" style interface for yaffs1 or yaffs2 */
7238 if (dev->writeChunkWithTagsToNAND &&
7239 dev->readChunkWithTagsFromNAND &&
7240 !dev->writeChunkToNAND &&
7241 !dev->readChunkFromNAND &&
7242 dev->markNANDBlockBad && dev->queryNANDBlock)
7246 /* Can use the "spare" style interface for yaffs1 */
7247 if (!dev->isYaffs2 &&
7248 !dev->writeChunkWithTagsToNAND &&
7249 !dev->readChunkWithTagsFromNAND &&
7250 dev->writeChunkToNAND &&
7251 dev->readChunkFromNAND &&
7252 !dev->markNANDBlockBad && !dev->queryNANDBlock)
7259 static int yaffs_CreateInitialDirectories(yaffs_Device *dev)
7261 /* Initialise the unlinked, deleted, root and lost and found directories */
7263 dev->lostNFoundDir = dev->rootDir = NULL;
7264 dev->unlinkedDir = dev->deletedDir = NULL;
7267 yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_UNLINKED, S_IFDIR);
7270 yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_DELETED, S_IFDIR);
7273 yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_ROOT,
7274 YAFFS_ROOT_MODE | S_IFDIR);
7275 dev->lostNFoundDir =
7276 yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_LOSTNFOUND,
7277 YAFFS_LOSTNFOUND_MODE | S_IFDIR);
7279 if (dev->lostNFoundDir && dev->rootDir && dev->unlinkedDir && dev->deletedDir) {
7280 yaffs_AddObjectToDirectory(dev->rootDir, dev->lostNFoundDir);
7287 int yaffs_GutsInitialise(yaffs_Device *dev)
7289 int init_failed = 0;
7293 T(YAFFS_TRACE_TRACING, (TSTR("yaffs: yaffs_GutsInitialise()" TENDSTR)));
7295 /* Check stuff that must be set */
7298 T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Need a device" TENDSTR)));
7302 dev->internalStartBlock = dev->startBlock;
7303 dev->internalEndBlock = dev->endBlock;
7304 dev->blockOffset = 0;
7305 dev->chunkOffset = 0;
7306 dev->nFreeChunks = 0;
7310 if (dev->startBlock == 0) {
7311 dev->internalStartBlock = dev->startBlock + 1;
7312 dev->internalEndBlock = dev->endBlock + 1;
7313 dev->blockOffset = 1;
7314 dev->chunkOffset = dev->nChunksPerBlock;
7317 /* Check geometry parameters. */
7319 if ((!dev->inbandTags && dev->isYaffs2 && dev->totalBytesPerChunk < 1024) ||
7320 (!dev->isYaffs2 && dev->totalBytesPerChunk < 512) ||
7321 (dev->inbandTags && !dev->isYaffs2) ||
7322 dev->nChunksPerBlock < 2 ||
7323 dev->nReservedBlocks < 2 ||
7324 dev->internalStartBlock <= 0 ||
7325 dev->internalEndBlock <= 0 ||
7326 dev->internalEndBlock <= (dev->internalStartBlock + dev->nReservedBlocks + 2)) { /* otherwise it is too small */
7327 T(YAFFS_TRACE_ALWAYS,
7329 ("yaffs: NAND geometry problems: chunk size %d, type is yaffs%s, inbandTags %d "
7330 TENDSTR), dev->totalBytesPerChunk, dev->isYaffs2 ? "2" : "", dev->inbandTags));
7334 if (yaffs_InitialiseNAND(dev) != YAFFS_OK) {
7335 T(YAFFS_TRACE_ALWAYS,
7336 (TSTR("yaffs: InitialiseNAND failed" TENDSTR)));
7340 /* Sort out space for inband tags, if required */
7341 if (dev->inbandTags)
7342 dev->nDataBytesPerChunk = dev->totalBytesPerChunk - sizeof(yaffs_PackedTags2TagsPart);
7344 dev->nDataBytesPerChunk = dev->totalBytesPerChunk;
7346 /* Got the right mix of functions? */
7347 if (!yaffs_CheckDevFunctions(dev)) {
7348 /* Function missing */
7349 T(YAFFS_TRACE_ALWAYS,
7351 ("yaffs: device function(s) missing or wrong\n" TENDSTR)));
7356 /* This is really a compilation check. */
7357 if (!yaffs_CheckStructures()) {
7358 T(YAFFS_TRACE_ALWAYS,
7359 (TSTR("yaffs_CheckStructures failed\n" TENDSTR)));
7363 if (dev->isMounted) {
7364 T(YAFFS_TRACE_ALWAYS,
7365 (TSTR("yaffs: device already mounted\n" TENDSTR)));
7369 /* Finished with most checks. One or two more checks happen later on too. */
7373 /* OK now calculate a few things for the device */
7376 * Calculate all the chunk size manipulation numbers:
7378 x = dev->nDataBytesPerChunk;
7379 /* We always use dev->chunkShift and dev->chunkDiv */
7380 dev->chunkShift = Shifts(x);
7381 x >>= dev->chunkShift;
7383 /* We only use chunk mask if chunkDiv is 1 */
7384 dev->chunkMask = (1<<dev->chunkShift) - 1;
7387 * Calculate chunkGroupBits.
7388 * We need to find the next power of 2 > than internalEndBlock
7391 x = dev->nChunksPerBlock * (dev->internalEndBlock + 1);
7395 /* Set up tnode width if wide tnodes are enabled. */
7396 if (!dev->wideTnodesDisabled) {
7397 /* bits must be even so that we end up with 32-bit words */
7401 dev->tnodeWidth = 16;
7403 dev->tnodeWidth = bits;
7405 dev->tnodeWidth = 16;
7407 dev->tnodeMask = (1<<dev->tnodeWidth)-1;
7409 /* Level0 Tnodes are 16 bits or wider (if wide tnodes are enabled),
7410 * so if the bitwidth of the
7411 * chunk range we're using is greater than 16 we need
7412 * to figure out chunk shift and chunkGroupSize
7415 if (bits <= dev->tnodeWidth)
7416 dev->chunkGroupBits = 0;
7418 dev->chunkGroupBits = bits - dev->tnodeWidth;
7421 dev->chunkGroupSize = 1 << dev->chunkGroupBits;
7423 if (dev->nChunksPerBlock < dev->chunkGroupSize) {
7424 /* We have a problem because the soft delete won't work if
7425 * the chunk group size > chunks per block.
7426 * This can be remedied by using larger "virtual blocks".
7428 T(YAFFS_TRACE_ALWAYS,
7429 (TSTR("yaffs: chunk group too large\n" TENDSTR)));
7434 /* OK, we've finished verifying the device, lets continue with initialisation */
7436 /* More device initialisation */
7437 dev->garbageCollections = 0;
7438 dev->passiveGarbageCollections = 0;
7439 dev->currentDirtyChecker = 0;
7440 dev->bufferedBlock = -1;
7441 dev->doingBufferedBlockRewrite = 0;
7442 dev->nDeletedFiles = 0;
7443 dev->nBackgroundDeletions = 0;
7444 dev->nUnlinkedFiles = 0;
7446 dev->eccUnfixed = 0;
7447 dev->tagsEccFixed = 0;
7448 dev->tagsEccUnfixed = 0;
7449 dev->nErasureFailures = 0;
7450 dev->nErasedBlocks = 0;
7452 dev->hasPendingPrioritisedGCs = 1; /* Assume the worst for now, will get fixed on first GC */
7454 /* Initialise temporary buffers and caches. */
7455 if (!yaffs_InitialiseTempBuffers(dev))
7458 dev->srCache = NULL;
7459 dev->gcCleanupList = NULL;
7463 dev->nShortOpCaches > 0) {
7466 int srCacheBytes = dev->nShortOpCaches * sizeof(yaffs_ChunkCache);
7468 if (dev->nShortOpCaches > YAFFS_MAX_SHORT_OP_CACHES)
7469 dev->nShortOpCaches = YAFFS_MAX_SHORT_OP_CACHES;
7471 dev->srCache = YMALLOC(srCacheBytes);
7473 buf = (__u8 *) dev->srCache;
7476 memset(dev->srCache, 0, srCacheBytes);
7478 for (i = 0; i < dev->nShortOpCaches && buf; i++) {
7479 dev->srCache[i].object = NULL;
7480 dev->srCache[i].lastUse = 0;
7481 dev->srCache[i].dirty = 0;
7482 dev->srCache[i].data = buf = YMALLOC_DMA(dev->totalBytesPerChunk);
7493 dev->gcCleanupList = YMALLOC(dev->nChunksPerBlock * sizeof(__u32));
7494 if (!dev->gcCleanupList)
7499 dev->useHeaderFileSize = 1;
7501 if (!init_failed && !yaffs_InitialiseBlocks(dev))
7504 yaffs_InitialiseTnodes(dev);
7505 yaffs_InitialiseObjects(dev);
7507 if (!init_failed && !yaffs_CreateInitialDirectories(dev))
7512 /* Now scan the flash. */
7513 if (dev->isYaffs2) {
7514 if (yaffs_CheckpointRestore(dev)) {
7515 yaffs_CheckObjectDetailsLoaded(dev->rootDir);
7516 T(YAFFS_TRACE_ALWAYS,
7517 (TSTR("yaffs: restored from checkpoint" TENDSTR)));
7520 /* Clean up the mess caused by an aborted checkpoint load
7521 * and scan backwards.
7523 yaffs_DeinitialiseBlocks(dev);
7524 yaffs_DeinitialiseTnodes(dev);
7525 yaffs_DeinitialiseObjects(dev);
7528 dev->nErasedBlocks = 0;
7529 dev->nFreeChunks = 0;
7530 dev->allocationBlock = -1;
7531 dev->allocationPage = -1;
7532 dev->nDeletedFiles = 0;
7533 dev->nUnlinkedFiles = 0;
7534 dev->nBackgroundDeletions = 0;
7535 dev->oldestDirtySequence = 0;
7537 if (!init_failed && !yaffs_InitialiseBlocks(dev))
7540 yaffs_InitialiseTnodes(dev);
7541 yaffs_InitialiseObjects(dev);
7543 if (!init_failed && !yaffs_CreateInitialDirectories(dev))
7546 if (!init_failed && !yaffs_ScanBackwards(dev))
7549 } else if (!yaffs_Scan(dev))
7552 yaffs_StripDeletedObjects(dev);
7553 yaffs_FixHangingObjects(dev);
7554 if(dev->emptyLostAndFound)
7555 yaffs_EmptyLostAndFound(dev);
7559 /* Clean up the mess */
7560 T(YAFFS_TRACE_TRACING,
7561 (TSTR("yaffs: yaffs_GutsInitialise() aborted.\n" TENDSTR)));
7563 yaffs_Deinitialise(dev);
7567 /* Zero out stats */
7568 dev->nPageReads = 0;
7569 dev->nPageWrites = 0;
7570 dev->nBlockErasures = 0;
7572 dev->nRetriedWrites = 0;
7574 dev->nRetiredBlocks = 0;
7576 yaffs_VerifyFreeChunks(dev);
7577 yaffs_VerifyBlocks(dev);
7579 /* Clean up any aborted checkpoint data */
7580 if(!dev->isCheckpointed && dev->blocksInCheckpoint > 0)
7581 yaffs_InvalidateCheckpoint(dev);
7583 T(YAFFS_TRACE_TRACING,
7584 (TSTR("yaffs: yaffs_GutsInitialise() done.\n" TENDSTR)));
7589 void yaffs_Deinitialise(yaffs_Device *dev)
7591 if (dev->isMounted) {
7594 yaffs_DeinitialiseBlocks(dev);
7595 yaffs_DeinitialiseTnodes(dev);
7596 yaffs_DeinitialiseObjects(dev);
7597 if (dev->nShortOpCaches > 0 &&
7600 for (i = 0; i < dev->nShortOpCaches; i++) {
7601 if (dev->srCache[i].data)
7602 YFREE(dev->srCache[i].data);
7603 dev->srCache[i].data = NULL;
7606 YFREE(dev->srCache);
7607 dev->srCache = NULL;
7610 YFREE(dev->gcCleanupList);
7612 for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++)
7613 YFREE(dev->tempBuffer[i].buffer);
7617 if (dev->deinitialiseNAND)
7618 dev->deinitialiseNAND(dev);
7622 static int yaffs_CountFreeChunks(yaffs_Device *dev)
7627 yaffs_BlockInfo *blk;
7629 for (nFree = 0, b = dev->internalStartBlock; b <= dev->internalEndBlock;
7631 blk = yaffs_GetBlockInfo(dev, b);
7633 switch (blk->blockState) {
7634 case YAFFS_BLOCK_STATE_EMPTY:
7635 case YAFFS_BLOCK_STATE_ALLOCATING:
7636 case YAFFS_BLOCK_STATE_COLLECTING:
7637 case YAFFS_BLOCK_STATE_FULL:
7639 (dev->nChunksPerBlock - blk->pagesInUse +
7640 blk->softDeletions);
7650 int yaffs_GetNumberOfFreeChunks(yaffs_Device *dev)
7652 /* This is what we report to the outside world */
7655 int nDirtyCacheChunks;
7656 int blocksForCheckpoint;
7660 nFree = dev->nFreeChunks;
7662 nFree = yaffs_CountFreeChunks(dev);
7665 nFree += dev->nDeletedFiles;
7667 /* Now count the number of dirty chunks in the cache and subtract those */
7669 for (nDirtyCacheChunks = 0, i = 0; i < dev->nShortOpCaches; i++) {
7670 if (dev->srCache[i].dirty)
7671 nDirtyCacheChunks++;
7674 nFree -= nDirtyCacheChunks;
7676 nFree -= ((dev->nReservedBlocks + 1) * dev->nChunksPerBlock);
7678 /* Now we figure out how much to reserve for the checkpoint and report that... */
7679 blocksForCheckpoint = yaffs_CalcCheckpointBlocksRequired(dev) - dev->blocksInCheckpoint;
7680 if (blocksForCheckpoint < 0)
7681 blocksForCheckpoint = 0;
7683 nFree -= (blocksForCheckpoint * dev->nChunksPerBlock);
7692 static int yaffs_freeVerificationFailures;
7694 static void yaffs_VerifyFreeChunks(yaffs_Device *dev)
7699 if (yaffs_SkipVerification(dev))
7702 counted = yaffs_CountFreeChunks(dev);
7704 difference = dev->nFreeChunks - counted;
7707 T(YAFFS_TRACE_ALWAYS,
7708 (TSTR("Freechunks verification failure %d %d %d" TENDSTR),
7709 dev->nFreeChunks, counted, difference));
7710 yaffs_freeVerificationFailures++;
7714 /*---------------------------------------- YAFFS test code ----------------------*/
7716 #define yaffs_CheckStruct(structure, syze, name) \
7718 if (sizeof(structure) != syze) { \
7719 T(YAFFS_TRACE_ALWAYS, (TSTR("%s should be %d but is %d\n" TENDSTR),\
7720 name, syze, sizeof(structure))); \
7721 return YAFFS_FAIL; \
7725 static int yaffs_CheckStructures(void)
7727 /* yaffs_CheckStruct(yaffs_Tags,8,"yaffs_Tags"); */
7728 /* yaffs_CheckStruct(yaffs_TagsUnion,8,"yaffs_TagsUnion"); */
7729 /* yaffs_CheckStruct(yaffs_Spare,16,"yaffs_Spare"); */
7730 #ifndef CONFIG_YAFFS_TNODE_LIST_DEBUG
7731 yaffs_CheckStruct(yaffs_Tnode, 2 * YAFFS_NTNODES_LEVEL0, "yaffs_Tnode");
7733 #ifndef CONFIG_YAFFS_WINCE
7734 yaffs_CheckStruct(yaffs_ObjectHeader, 512, "yaffs_ObjectHeader");