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 1.101 2009-12-25 01:53:05 charles Exp $";
19 #include "yaffsinterface.h"
20 #include "yaffs_guts.h"
21 #include "yaffs_tagsvalidity.h"
22 #include "yaffs_getblockinfo.h"
24 #include "yaffs_tagscompat.h"
25 #ifndef CONFIG_YAFFS_USE_OWN_SORT
26 #include "yaffs_qsort.h"
28 #include "yaffs_nand.h"
30 #include "yaffs_checkptrw.h"
32 #include "yaffs_nand.h"
33 #include "yaffs_packedtags2.h"
36 #define YAFFS_PASSIVE_GC_CHUNKS 2
38 #include "yaffs_ecc.h"
41 /* Robustification (if it ever comes about...) */
42 static void yaffs_RetireBlock(yaffs_Device *dev, int blockInNAND);
43 static void yaffs_HandleWriteChunkError(yaffs_Device *dev, int chunkInNAND,
45 static void yaffs_HandleWriteChunkOk(yaffs_Device *dev, int chunkInNAND,
47 const yaffs_ExtendedTags *tags);
48 static void yaffs_HandleUpdateChunk(yaffs_Device *dev, int chunkInNAND,
49 const yaffs_ExtendedTags *tags);
51 /* Other local prototypes */
52 static void yaffs_UpdateParent(yaffs_Object *obj);
53 static int yaffs_UnlinkObject(yaffs_Object *obj);
54 static int yaffs_ObjectHasCachedWriteData(yaffs_Object *obj);
56 static void yaffs_HardlinkFixup(yaffs_Device *dev, yaffs_Object *hardList);
58 static int yaffs_WriteNewChunkWithTagsToNAND(yaffs_Device *dev,
60 yaffs_ExtendedTags *tags,
62 static int yaffs_PutChunkIntoFile(yaffs_Object *in, int chunkInInode,
63 int chunkInNAND, int inScan);
65 static yaffs_Object *yaffs_CreateNewObject(yaffs_Device *dev, int number,
66 yaffs_ObjectType type);
67 static void yaffs_AddObjectToDirectory(yaffs_Object *directory,
69 static int yaffs_UpdateObjectHeader(yaffs_Object *in, const YCHAR *name,
70 int force, int isShrink, int shadows);
71 static void yaffs_RemoveObjectFromDirectory(yaffs_Object *obj);
72 static int yaffs_CheckStructures(void);
73 static int yaffs_DeleteWorker(yaffs_Object *in, yaffs_Tnode *tn, __u32 level,
74 int chunkOffset, int *limit);
75 static int yaffs_DoGenericObjectDeletion(yaffs_Object *in);
77 static yaffs_BlockInfo *yaffs_GetBlockInfo(yaffs_Device *dev, int blockNo);
80 static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,
83 static int yaffs_UnlinkWorker(yaffs_Object *obj);
85 static int yaffs_TagsMatch(const yaffs_ExtendedTags *tags, int objectId,
88 static int yaffs_AllocateChunk(yaffs_Device *dev, int useReserve,
89 yaffs_BlockInfo **blockUsedPtr);
91 static void yaffs_VerifyFreeChunks(yaffs_Device *dev);
93 static void yaffs_CheckObjectDetailsLoaded(yaffs_Object *in);
95 static void yaffs_VerifyDirectory(yaffs_Object *directory);
97 static int yaffs_CheckFileSanity(yaffs_Object *in);
99 #define yaffs_CheckFileSanity(in)
102 static void yaffs_InvalidateWholeChunkCache(yaffs_Object *in);
103 static void yaffs_InvalidateChunkCache(yaffs_Object *object, int chunkId);
105 static void yaffs_InvalidateCheckpoint(yaffs_Device *dev);
107 static int yaffs_FindChunkInFile(yaffs_Object *in, int chunkInInode,
108 yaffs_ExtendedTags *tags);
110 static __u32 yaffs_GetChunkGroupBase(yaffs_Device *dev, yaffs_Tnode *tn,
112 static yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device *dev,
113 yaffs_FileStructure *fStruct,
116 static void yaffs_SkipRestOfBlock(yaffs_Device *dev);
117 static int yaffs_VerifyChunkWritten(yaffs_Device *dev,
120 yaffs_ExtendedTags *tags);
122 /* Function to calculate chunk and offset */
124 static void yaffs_AddrToChunk(yaffs_Device *dev, loff_t addr, int *chunkOut,
130 chunk = (__u32)(addr >> dev->chunkShift);
132 if (dev->chunkDiv == 1) {
133 /* easy power of 2 case */
134 offset = (__u32)(addr & dev->chunkMask);
136 /* Non power-of-2 case */
140 chunk /= dev->chunkDiv;
142 chunkBase = ((loff_t)chunk) * dev->nDataBytesPerChunk;
143 offset = (__u32)(addr - chunkBase);
150 /* Function to return the number of shifts for a power of 2 greater than or
151 * equal to the given number
152 * Note we don't try to cater for all possible numbers and this does not have to
153 * be hellishly efficient.
156 static __u32 ShiftsGE(__u32 x)
161 nShifts = extraBits = 0;
176 /* Function to return the number of shifts to get a 1 in bit 0
179 static __u32 Shifts(__u32 x)
199 * Temporary buffer manipulations.
202 static int yaffs_InitialiseTempBuffers(yaffs_Device *dev)
205 __u8 *buf = (__u8 *)1;
207 memset(dev->tempBuffer, 0, sizeof(dev->tempBuffer));
209 for (i = 0; buf && i < YAFFS_N_TEMP_BUFFERS; i++) {
210 dev->tempBuffer[i].line = 0; /* not in use */
211 dev->tempBuffer[i].buffer = buf =
212 YMALLOC_DMA(dev->totalBytesPerChunk);
215 return buf ? YAFFS_OK : YAFFS_FAIL;
218 __u8 *yaffs_GetTempBuffer(yaffs_Device *dev, int lineNo)
223 if (dev->tempInUse > dev->maxTemp)
224 dev->maxTemp = dev->tempInUse;
226 for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) {
227 if (dev->tempBuffer[i].line == 0) {
228 dev->tempBuffer[i].line = lineNo;
229 if ((i + 1) > dev->maxTemp) {
230 dev->maxTemp = i + 1;
231 for (j = 0; j <= i; j++)
232 dev->tempBuffer[j].maxLine =
233 dev->tempBuffer[j].line;
236 return dev->tempBuffer[i].buffer;
240 T(YAFFS_TRACE_BUFFERS,
241 (TSTR("Out of temp buffers at line %d, other held by lines:"),
243 for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++)
244 T(YAFFS_TRACE_BUFFERS, (TSTR(" %d "), dev->tempBuffer[i].line));
246 T(YAFFS_TRACE_BUFFERS, (TSTR(" " TENDSTR)));
249 * If we got here then we have to allocate an unmanaged one
253 dev->unmanagedTempAllocations++;
254 return YMALLOC(dev->nDataBytesPerChunk);
258 void yaffs_ReleaseTempBuffer(yaffs_Device *dev, __u8 *buffer,
265 for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) {
266 if (dev->tempBuffer[i].buffer == buffer) {
267 dev->tempBuffer[i].line = 0;
273 /* assume it is an unmanaged one. */
274 T(YAFFS_TRACE_BUFFERS,
275 (TSTR("Releasing unmanaged temp buffer in line %d" TENDSTR),
278 dev->unmanagedTempDeallocations++;
284 * Determine if we have a managed buffer.
286 int yaffs_IsManagedTempBuffer(yaffs_Device *dev, const __u8 *buffer)
290 for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) {
291 if (dev->tempBuffer[i].buffer == buffer)
295 for (i = 0; i < dev->nShortOpCaches; i++) {
296 if (dev->srCache[i].data == buffer)
300 if (buffer == dev->checkpointBuffer)
303 T(YAFFS_TRACE_ALWAYS,
304 (TSTR("yaffs: unmaged buffer detected.\n" TENDSTR)));
311 * Chunk bitmap manipulations
314 static Y_INLINE __u8 *yaffs_BlockBits(yaffs_Device *dev, int blk)
316 if (blk < dev->internalStartBlock || blk > dev->internalEndBlock) {
318 (TSTR("**>> yaffs: BlockBits block %d is not valid" TENDSTR),
322 return dev->chunkBits +
323 (dev->chunkBitmapStride * (blk - dev->internalStartBlock));
326 static Y_INLINE void yaffs_VerifyChunkBitId(yaffs_Device *dev, int blk, int chunk)
328 if (blk < dev->internalStartBlock || blk > dev->internalEndBlock ||
329 chunk < 0 || chunk >= dev->nChunksPerBlock) {
331 (TSTR("**>> yaffs: Chunk Id (%d:%d) invalid"TENDSTR),
337 static Y_INLINE void yaffs_ClearChunkBits(yaffs_Device *dev, int blk)
339 __u8 *blkBits = yaffs_BlockBits(dev, blk);
341 memset(blkBits, 0, dev->chunkBitmapStride);
344 static Y_INLINE void yaffs_ClearChunkBit(yaffs_Device *dev, int blk, int chunk)
346 __u8 *blkBits = yaffs_BlockBits(dev, blk);
348 yaffs_VerifyChunkBitId(dev, blk, chunk);
350 blkBits[chunk / 8] &= ~(1 << (chunk & 7));
353 static Y_INLINE void yaffs_SetChunkBit(yaffs_Device *dev, int blk, int chunk)
355 __u8 *blkBits = yaffs_BlockBits(dev, blk);
357 yaffs_VerifyChunkBitId(dev, blk, chunk);
359 blkBits[chunk / 8] |= (1 << (chunk & 7));
362 static Y_INLINE int yaffs_CheckChunkBit(yaffs_Device *dev, int blk, int chunk)
364 __u8 *blkBits = yaffs_BlockBits(dev, blk);
365 yaffs_VerifyChunkBitId(dev, blk, chunk);
367 return (blkBits[chunk / 8] & (1 << (chunk & 7))) ? 1 : 0;
370 static Y_INLINE int yaffs_StillSomeChunkBits(yaffs_Device *dev, int blk)
372 __u8 *blkBits = yaffs_BlockBits(dev, blk);
374 for (i = 0; i < dev->chunkBitmapStride; i++) {
382 static int yaffs_CountChunkBits(yaffs_Device *dev, int blk)
384 __u8 *blkBits = yaffs_BlockBits(dev, blk);
387 for (i = 0; i < dev->chunkBitmapStride; i++) {
404 static int yaffs_SkipVerification(yaffs_Device *dev)
406 return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY | YAFFS_TRACE_VERIFY_FULL));
409 static int yaffs_SkipFullVerification(yaffs_Device *dev)
411 return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY_FULL));
414 static int yaffs_SkipNANDVerification(yaffs_Device *dev)
416 return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY_NAND));
419 static const char *blockStateName[] = {
432 static void yaffs_VerifyBlock(yaffs_Device *dev, yaffs_BlockInfo *bi, int n)
437 if (yaffs_SkipVerification(dev))
440 /* Report illegal runtime states */
441 if (bi->blockState >= YAFFS_NUMBER_OF_BLOCK_STATES)
442 T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has undefined state %d"TENDSTR), n, bi->blockState));
444 switch (bi->blockState) {
445 case YAFFS_BLOCK_STATE_UNKNOWN:
446 case YAFFS_BLOCK_STATE_SCANNING:
447 case YAFFS_BLOCK_STATE_NEEDS_SCANNING:
448 T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has bad run-state %s"TENDSTR),
449 n, blockStateName[bi->blockState]));
452 /* Check pages in use and soft deletions are legal */
454 actuallyUsed = bi->pagesInUse - bi->softDeletions;
456 if (bi->pagesInUse < 0 || bi->pagesInUse > dev->nChunksPerBlock ||
457 bi->softDeletions < 0 || bi->softDeletions > dev->nChunksPerBlock ||
458 actuallyUsed < 0 || actuallyUsed > dev->nChunksPerBlock)
459 T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has illegal values pagesInUsed %d softDeletions %d"TENDSTR),
460 n, bi->pagesInUse, bi->softDeletions));
463 /* Check chunk bitmap legal */
464 inUse = yaffs_CountChunkBits(dev, n);
465 if (inUse != bi->pagesInUse)
466 T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has inconsistent values pagesInUse %d counted chunk bits %d"TENDSTR),
467 n, bi->pagesInUse, inUse));
469 /* Check that the sequence number is valid.
470 * Ten million is legal, but is very unlikely
473 (bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING || bi->blockState == YAFFS_BLOCK_STATE_FULL) &&
474 (bi->sequenceNumber < YAFFS_LOWEST_SEQUENCE_NUMBER || bi->sequenceNumber > 10000000))
475 T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has suspect sequence number of %d"TENDSTR),
476 n, bi->sequenceNumber));
479 static void yaffs_VerifyCollectedBlock(yaffs_Device *dev, yaffs_BlockInfo *bi,
482 yaffs_VerifyBlock(dev, bi, n);
484 /* After collection the block should be in the erased state */
485 /* This will need to change if we do partial gc */
487 if (bi->blockState != YAFFS_BLOCK_STATE_COLLECTING &&
488 bi->blockState != YAFFS_BLOCK_STATE_EMPTY) {
489 T(YAFFS_TRACE_ERROR, (TSTR("Block %d is in state %d after gc, should be erased"TENDSTR),
494 static void yaffs_VerifyBlocks(yaffs_Device *dev)
497 int nBlocksPerState[YAFFS_NUMBER_OF_BLOCK_STATES];
498 int nIllegalBlockStates = 0;
500 if (yaffs_SkipVerification(dev))
503 memset(nBlocksPerState, 0, sizeof(nBlocksPerState));
505 for (i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) {
506 yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, i);
507 yaffs_VerifyBlock(dev, bi, i);
509 if (bi->blockState < YAFFS_NUMBER_OF_BLOCK_STATES)
510 nBlocksPerState[bi->blockState]++;
512 nIllegalBlockStates++;
515 T(YAFFS_TRACE_VERIFY, (TSTR(""TENDSTR)));
516 T(YAFFS_TRACE_VERIFY, (TSTR("Block summary"TENDSTR)));
518 T(YAFFS_TRACE_VERIFY, (TSTR("%d blocks have illegal states"TENDSTR), nIllegalBlockStates));
519 if (nBlocksPerState[YAFFS_BLOCK_STATE_ALLOCATING] > 1)
520 T(YAFFS_TRACE_VERIFY, (TSTR("Too many allocating blocks"TENDSTR)));
522 for (i = 0; i < YAFFS_NUMBER_OF_BLOCK_STATES; i++)
523 T(YAFFS_TRACE_VERIFY,
524 (TSTR("%s %d blocks"TENDSTR),
525 blockStateName[i], nBlocksPerState[i]));
527 if (dev->blocksInCheckpoint != nBlocksPerState[YAFFS_BLOCK_STATE_CHECKPOINT])
528 T(YAFFS_TRACE_VERIFY,
529 (TSTR("Checkpoint block count wrong dev %d count %d"TENDSTR),
530 dev->blocksInCheckpoint, nBlocksPerState[YAFFS_BLOCK_STATE_CHECKPOINT]));
532 if (dev->nErasedBlocks != nBlocksPerState[YAFFS_BLOCK_STATE_EMPTY])
533 T(YAFFS_TRACE_VERIFY,
534 (TSTR("Erased block count wrong dev %d count %d"TENDSTR),
535 dev->nErasedBlocks, nBlocksPerState[YAFFS_BLOCK_STATE_EMPTY]));
537 if (nBlocksPerState[YAFFS_BLOCK_STATE_COLLECTING] > 1)
538 T(YAFFS_TRACE_VERIFY,
539 (TSTR("Too many collecting blocks %d (max is 1)"TENDSTR),
540 nBlocksPerState[YAFFS_BLOCK_STATE_COLLECTING]));
542 T(YAFFS_TRACE_VERIFY, (TSTR(""TENDSTR)));
547 * Verify the object header. oh must be valid, but obj and tags may be NULL in which
548 * case those tests will not be performed.
550 static void yaffs_VerifyObjectHeader(yaffs_Object *obj, yaffs_ObjectHeader *oh, yaffs_ExtendedTags *tags, int parentCheck)
552 if (obj && yaffs_SkipVerification(obj->myDev))
555 if (!(tags && obj && oh)) {
556 T(YAFFS_TRACE_VERIFY,
557 (TSTR("Verifying object header tags %p obj %p oh %p"TENDSTR),
562 if (oh->type <= YAFFS_OBJECT_TYPE_UNKNOWN ||
563 oh->type > YAFFS_OBJECT_TYPE_MAX)
564 T(YAFFS_TRACE_VERIFY,
565 (TSTR("Obj %d header type is illegal value 0x%x"TENDSTR),
566 tags->objectId, oh->type));
568 if (tags->objectId != obj->objectId)
569 T(YAFFS_TRACE_VERIFY,
570 (TSTR("Obj %d header mismatch objectId %d"TENDSTR),
571 tags->objectId, obj->objectId));
575 * Check that the object's parent ids match if parentCheck requested.
577 * Tests do not apply to the root object.
580 if (parentCheck && tags->objectId > 1 && !obj->parent)
581 T(YAFFS_TRACE_VERIFY,
582 (TSTR("Obj %d header mismatch parentId %d obj->parent is NULL"TENDSTR),
583 tags->objectId, oh->parentObjectId));
585 if (parentCheck && obj->parent &&
586 oh->parentObjectId != obj->parent->objectId &&
587 (oh->parentObjectId != YAFFS_OBJECTID_UNLINKED ||
588 obj->parent->objectId != YAFFS_OBJECTID_DELETED))
589 T(YAFFS_TRACE_VERIFY,
590 (TSTR("Obj %d header mismatch parentId %d parentObjectId %d"TENDSTR),
591 tags->objectId, oh->parentObjectId, obj->parent->objectId));
593 if (tags->objectId > 1 && oh->name[0] == 0) /* Null name */
594 T(YAFFS_TRACE_VERIFY,
595 (TSTR("Obj %d header name is NULL"TENDSTR),
598 if (tags->objectId > 1 && ((__u8)(oh->name[0])) == 0xff) /* Trashed name */
599 T(YAFFS_TRACE_VERIFY,
600 (TSTR("Obj %d header name is 0xFF"TENDSTR),
606 static int yaffs_VerifyTnodeWorker(yaffs_Object *obj, yaffs_Tnode *tn,
607 __u32 level, int chunkOffset)
610 yaffs_Device *dev = obj->myDev;
616 for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++) {
617 if (tn->internal[i]) {
618 ok = yaffs_VerifyTnodeWorker(obj,
621 (chunkOffset<<YAFFS_TNODES_INTERNAL_BITS) + i);
624 } else if (level == 0) {
625 yaffs_ExtendedTags tags;
626 __u32 objectId = obj->objectId;
628 chunkOffset <<= YAFFS_TNODES_LEVEL0_BITS;
630 for (i = 0; i < YAFFS_NTNODES_LEVEL0; i++) {
631 __u32 theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
634 /* T(~0,(TSTR("verifying (%d:%d) %d"TENDSTR),tags.objectId,tags.chunkId,theChunk)); */
635 yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL, &tags);
636 if (tags.objectId != objectId || tags.chunkId != chunkOffset) {
637 T(~0, (TSTR("Object %d chunkId %d NAND mismatch chunk %d tags (%d:%d)"TENDSTR),
638 objectId, chunkOffset, theChunk,
639 tags.objectId, tags.chunkId));
652 static void yaffs_VerifyFile(yaffs_Object *obj)
654 int requiredTallness;
660 yaffs_ExtendedTags tags;
667 if (yaffs_SkipVerification(obj->myDev))
671 objectId = obj->objectId;
673 /* Check file size is consistent with tnode depth */
674 lastChunk = obj->variant.fileVariant.fileSize / dev->nDataBytesPerChunk + 1;
675 x = lastChunk >> YAFFS_TNODES_LEVEL0_BITS;
676 requiredTallness = 0;
678 x >>= YAFFS_TNODES_INTERNAL_BITS;
682 actualTallness = obj->variant.fileVariant.topLevel;
684 if (requiredTallness > actualTallness)
685 T(YAFFS_TRACE_VERIFY,
686 (TSTR("Obj %d had tnode tallness %d, needs to be %d"TENDSTR),
687 obj->objectId, actualTallness, requiredTallness));
690 /* Check that the chunks in the tnode tree are all correct.
691 * We do this by scanning through the tnode tree and
692 * checking the tags for every chunk match.
695 if (yaffs_SkipNANDVerification(dev))
698 for (i = 1; i <= lastChunk; i++) {
699 tn = yaffs_FindLevel0Tnode(dev, &obj->variant.fileVariant, i);
702 __u32 theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
704 /* T(~0,(TSTR("verifying (%d:%d) %d"TENDSTR),objectId,i,theChunk)); */
705 yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL, &tags);
706 if (tags.objectId != objectId || tags.chunkId != i) {
707 T(~0, (TSTR("Object %d chunkId %d NAND mismatch chunk %d tags (%d:%d)"TENDSTR),
708 objectId, i, theChunk,
709 tags.objectId, tags.chunkId));
717 static void yaffs_VerifyHardLink(yaffs_Object *obj)
719 if (obj && yaffs_SkipVerification(obj->myDev))
722 /* Verify sane equivalent object */
725 static void yaffs_VerifySymlink(yaffs_Object *obj)
727 if (obj && yaffs_SkipVerification(obj->myDev))
730 /* Verify symlink string */
733 static void yaffs_VerifySpecial(yaffs_Object *obj)
735 if (obj && yaffs_SkipVerification(obj->myDev))
739 static void yaffs_VerifyObject(yaffs_Object *obj)
748 __u32 chunkShouldNotBeDeleted;
754 if (obj->beingCreated)
759 if (yaffs_SkipVerification(dev))
762 /* Check sane object header chunk */
764 chunkMin = dev->internalStartBlock * dev->nChunksPerBlock;
765 chunkMax = (dev->internalEndBlock+1) * dev->nChunksPerBlock - 1;
767 chunkInRange = (((unsigned)(obj->hdrChunk)) >= chunkMin && ((unsigned)(obj->hdrChunk)) <= chunkMax);
768 chunkIdOk = chunkInRange || (obj->hdrChunk == 0);
769 chunkValid = chunkInRange &&
770 yaffs_CheckChunkBit(dev,
771 obj->hdrChunk / dev->nChunksPerBlock,
772 obj->hdrChunk % dev->nChunksPerBlock);
773 chunkShouldNotBeDeleted = chunkInRange && !chunkValid;
776 (!chunkIdOk || chunkShouldNotBeDeleted)) {
777 T(YAFFS_TRACE_VERIFY,
778 (TSTR("Obj %d has chunkId %d %s %s"TENDSTR),
779 obj->objectId, obj->hdrChunk,
780 chunkIdOk ? "" : ",out of range",
781 chunkShouldNotBeDeleted ? ",marked as deleted" : ""));
784 if (chunkValid && !yaffs_SkipNANDVerification(dev)) {
785 yaffs_ExtendedTags tags;
786 yaffs_ObjectHeader *oh;
787 __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__);
789 oh = (yaffs_ObjectHeader *)buffer;
791 yaffs_ReadChunkWithTagsFromNAND(dev, obj->hdrChunk, buffer,
794 yaffs_VerifyObjectHeader(obj, oh, &tags, 1);
796 yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
799 /* Verify it has a parent */
800 if (obj && !obj->fake &&
801 (!obj->parent || obj->parent->myDev != dev)) {
802 T(YAFFS_TRACE_VERIFY,
803 (TSTR("Obj %d has parent pointer %p which does not look like an object"TENDSTR),
804 obj->objectId, obj->parent));
807 /* Verify parent is a directory */
808 if (obj->parent && obj->parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
809 T(YAFFS_TRACE_VERIFY,
810 (TSTR("Obj %d's parent is not a directory (type %d)"TENDSTR),
811 obj->objectId, obj->parent->variantType));
814 switch (obj->variantType) {
815 case YAFFS_OBJECT_TYPE_FILE:
816 yaffs_VerifyFile(obj);
818 case YAFFS_OBJECT_TYPE_SYMLINK:
819 yaffs_VerifySymlink(obj);
821 case YAFFS_OBJECT_TYPE_DIRECTORY:
822 yaffs_VerifyDirectory(obj);
824 case YAFFS_OBJECT_TYPE_HARDLINK:
825 yaffs_VerifyHardLink(obj);
827 case YAFFS_OBJECT_TYPE_SPECIAL:
828 yaffs_VerifySpecial(obj);
830 case YAFFS_OBJECT_TYPE_UNKNOWN:
832 T(YAFFS_TRACE_VERIFY,
833 (TSTR("Obj %d has illegaltype %d"TENDSTR),
834 obj->objectId, obj->variantType));
839 static void yaffs_VerifyObjects(yaffs_Device *dev)
843 struct ylist_head *lh;
845 if (yaffs_SkipVerification(dev))
848 /* Iterate through the objects in each hash entry */
850 for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
851 ylist_for_each(lh, &dev->objectBucket[i].list) {
853 obj = ylist_entry(lh, yaffs_Object, hashLink);
854 yaffs_VerifyObject(obj);
862 * Simple hash function. Needs to have a reasonable spread
865 static Y_INLINE int yaffs_HashFunction(int n)
868 return n % YAFFS_NOBJECT_BUCKETS;
872 * Access functions to useful fake objects.
873 * Note that root might have a presence in NAND if permissions are set.
876 yaffs_Object *yaffs_Root(yaffs_Device *dev)
881 yaffs_Object *yaffs_LostNFound(yaffs_Device *dev)
883 return dev->lostNFoundDir;
888 * Erased NAND checking functions
891 int yaffs_CheckFF(__u8 *buffer, int nBytes)
893 /* Horrible, slow implementation */
902 static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,
905 int retval = YAFFS_OK;
906 __u8 *data = yaffs_GetTempBuffer(dev, __LINE__);
907 yaffs_ExtendedTags tags;
910 result = yaffs_ReadChunkWithTagsFromNAND(dev, chunkInNAND, data, &tags);
912 if (tags.eccResult > YAFFS_ECC_RESULT_NO_ERROR)
915 if (!yaffs_CheckFF(data, dev->nDataBytesPerChunk) || tags.chunkUsed) {
916 T(YAFFS_TRACE_NANDACCESS,
917 (TSTR("Chunk %d not erased" TENDSTR), chunkInNAND));
921 yaffs_ReleaseTempBuffer(dev, data, __LINE__);
928 static int yaffs_VerifyChunkWritten(yaffs_Device *dev,
931 yaffs_ExtendedTags *tags)
933 int retval = YAFFS_OK;
934 yaffs_ExtendedTags tempTags;
935 __u8 *buffer = yaffs_GetTempBuffer(dev,__LINE__);
938 result = yaffs_ReadChunkWithTagsFromNAND(dev,chunkInNAND,buffer,&tempTags);
939 if(memcmp(buffer,data,dev->nDataBytesPerChunk) ||
940 tempTags.objectId != tags->objectId ||
941 tempTags.chunkId != tags->chunkId ||
942 tempTags.byteCount != tags->byteCount)
945 yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
950 static int yaffs_WriteNewChunkWithTagsToNAND(struct yaffs_DeviceStruct *dev,
952 yaffs_ExtendedTags *tags,
959 yaffs_InvalidateCheckpoint(dev);
962 yaffs_BlockInfo *bi = 0;
965 chunk = yaffs_AllocateChunk(dev, useReserve, &bi);
971 /* First check this chunk is erased, if it needs
972 * checking. The checking policy (unless forced
973 * always on) is as follows:
975 * Check the first page we try to write in a block.
976 * If the check passes then we don't need to check any
977 * more. If the check fails, we check again...
978 * If the block has been erased, we don't need to check.
980 * However, if the block has been prioritised for gc,
981 * then we think there might be something odd about
982 * this block and stop using it.
984 * Rationale: We should only ever see chunks that have
985 * not been erased if there was a partially written
986 * chunk due to power loss. This checking policy should
987 * catch that case with very few checks and thus save a
988 * lot of checks that are most likely not needed.
991 * If an erase check fails or the write fails we skip the
995 /* let's give it a try */
998 #ifdef CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED
999 bi->skipErasedCheck = 0;
1001 if (!bi->skipErasedCheck) {
1002 erasedOk = yaffs_CheckChunkErased(dev, chunk);
1003 if (erasedOk != YAFFS_OK) {
1004 T(YAFFS_TRACE_ERROR,
1005 (TSTR("**>> yaffs chunk %d was not erased"
1008 /* If not erased, delete this one,
1009 * skip rest of block and
1010 * try another chunk */
1011 yaffs_DeleteChunk(dev,chunk,1,__LINE__);
1012 yaffs_SkipRestOfBlock(dev);
1017 writeOk = yaffs_WriteChunkWithTagsToNAND(dev, chunk,
1020 if(!bi->skipErasedCheck)
1021 writeOk = yaffs_VerifyChunkWritten(dev, chunk, data, tags);
1023 if (writeOk != YAFFS_OK) {
1024 /* Clean up aborted write, skip to next block and
1025 * try another chunk */
1026 yaffs_HandleWriteChunkError(dev, chunk, erasedOk);
1030 bi->skipErasedCheck = 1;
1032 /* Copy the data into the robustification buffer */
1033 yaffs_HandleWriteChunkOk(dev, chunk, data, tags);
1035 } while (writeOk != YAFFS_OK &&
1036 (yaffs_wr_attempts <= 0 || attempts <= yaffs_wr_attempts));
1042 T(YAFFS_TRACE_ERROR,
1043 (TSTR("**>> yaffs write required %d attempts" TENDSTR),
1046 dev->nRetriedWrites += (attempts - 1);
1053 * Block retiring for handling a broken block.
1056 static void yaffs_RetireBlock(yaffs_Device *dev, int blockInNAND)
1058 yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND);
1060 yaffs_InvalidateCheckpoint(dev);
1062 if (yaffs_MarkBlockBad(dev, blockInNAND) != YAFFS_OK) {
1063 if (yaffs_EraseBlockInNAND(dev, blockInNAND) != YAFFS_OK) {
1064 T(YAFFS_TRACE_ALWAYS, (TSTR(
1065 "yaffs: Failed to mark bad and erase block %d"
1066 TENDSTR), blockInNAND));
1068 yaffs_ExtendedTags tags;
1069 int chunkId = blockInNAND * dev->nChunksPerBlock;
1071 __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__);
1073 memset(buffer, 0xff, dev->nDataBytesPerChunk);
1074 yaffs_InitialiseTags(&tags);
1075 tags.sequenceNumber = YAFFS_SEQUENCE_BAD_BLOCK;
1076 if (dev->writeChunkWithTagsToNAND(dev, chunkId -
1077 dev->chunkOffset, buffer, &tags) != YAFFS_OK)
1078 T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Failed to "
1079 TCONT("write bad block marker to block %d")
1080 TENDSTR), blockInNAND));
1082 yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
1086 bi->blockState = YAFFS_BLOCK_STATE_DEAD;
1087 bi->gcPrioritise = 0;
1088 bi->needsRetiring = 0;
1090 dev->nRetiredBlocks++;
1094 * Functions for robustisizing TODO
1098 static void yaffs_HandleWriteChunkOk(yaffs_Device *dev, int chunkInNAND,
1100 const yaffs_ExtendedTags *tags)
1104 static void yaffs_HandleUpdateChunk(yaffs_Device *dev, int chunkInNAND,
1105 const yaffs_ExtendedTags *tags)
1109 void yaffs_HandleChunkError(yaffs_Device *dev, yaffs_BlockInfo *bi)
1111 if (!bi->gcPrioritise) {
1112 bi->gcPrioritise = 1;
1113 dev->hasPendingPrioritisedGCs = 1;
1114 bi->chunkErrorStrikes++;
1116 if (bi->chunkErrorStrikes > 3) {
1117 bi->needsRetiring = 1; /* Too many stikes, so retire this */
1118 T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Block struck out" TENDSTR)));
1124 static void yaffs_HandleWriteChunkError(yaffs_Device *dev, int chunkInNAND,
1127 int blockInNAND = chunkInNAND / dev->nChunksPerBlock;
1128 yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND);
1130 yaffs_HandleChunkError(dev, bi);
1133 /* Was an actual write failure, so mark the block for retirement */
1134 bi->needsRetiring = 1;
1135 T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
1136 (TSTR("**>> Block %d needs retiring" TENDSTR), blockInNAND));
1139 /* Delete the chunk */
1140 yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__);
1141 yaffs_SkipRestOfBlock(dev);
1145 /*---------------- Name handling functions ------------*/
1147 static __u16 yaffs_CalcNameSum(const YCHAR *name)
1152 const YUCHAR *bname = (const YUCHAR *) name;
1154 while ((*bname) && (i < (YAFFS_MAX_NAME_LENGTH/2))) {
1156 #ifdef CONFIG_YAFFS_CASE_INSENSITIVE
1157 sum += yaffs_toupper(*bname) * i;
1159 sum += (*bname) * i;
1168 static void yaffs_SetObjectName(yaffs_Object *obj, const YCHAR *name)
1170 #ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM
1171 memset(obj->shortName, 0, sizeof(YCHAR) * (YAFFS_SHORT_NAME_LENGTH+1));
1172 if (name && yaffs_strnlen(name,YAFFS_SHORT_NAME_LENGTH+1) <= YAFFS_SHORT_NAME_LENGTH)
1173 yaffs_strcpy(obj->shortName, name);
1175 obj->shortName[0] = _Y('\0');
1177 obj->sum = yaffs_CalcNameSum(name);
1180 /*-------------------- TNODES -------------------
1182 * List of spare tnodes
1183 * The list is hooked together using the first pointer
1187 /* yaffs_CreateTnodes creates a bunch more tnodes and
1188 * adds them to the tnode free list.
1189 * Don't use this function directly
1192 static int yaffs_CreateTnodes(yaffs_Device *dev, int nTnodes)
1196 yaffs_Tnode *newTnodes;
1200 yaffs_TnodeList *tnl;
1205 /* Calculate the tnode size in bytes for variable width tnode support.
1206 * Must be a multiple of 32-bits */
1207 tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
1209 if (tnodeSize < sizeof(yaffs_Tnode))
1210 tnodeSize = sizeof(yaffs_Tnode);
1212 /* make these things */
1214 newTnodes = YMALLOC(nTnodes * tnodeSize);
1215 mem = (__u8 *)newTnodes;
1218 T(YAFFS_TRACE_ERROR,
1219 (TSTR("yaffs: Could not allocate Tnodes" TENDSTR)));
1223 /* Hook them into the free list */
1225 for (i = 0; i < nTnodes - 1; i++) {
1226 newTnodes[i].internal[0] = &newTnodes[i + 1];
1227 #ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
1228 newTnodes[i].internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
1232 newTnodes[nTnodes - 1].internal[0] = dev->freeTnodes;
1233 #ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
1234 newTnodes[nTnodes - 1].internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
1236 dev->freeTnodes = newTnodes;
1238 /* New hookup for wide tnodes */
1239 for (i = 0; i < nTnodes - 1; i++) {
1240 curr = (yaffs_Tnode *) &mem[i * tnodeSize];
1241 next = (yaffs_Tnode *) &mem[(i+1) * tnodeSize];
1242 curr->internal[0] = next;
1245 curr = (yaffs_Tnode *) &mem[(nTnodes - 1) * tnodeSize];
1246 curr->internal[0] = dev->freeTnodes;
1247 dev->freeTnodes = (yaffs_Tnode *)mem;
1252 dev->nFreeTnodes += nTnodes;
1253 dev->nTnodesCreated += nTnodes;
1255 /* Now add this bunch of tnodes to a list for freeing up.
1256 * NB If we can't add this to the management list it isn't fatal
1257 * but it just means we can't free this bunch of tnodes later.
1260 tnl = YMALLOC(sizeof(yaffs_TnodeList));
1262 T(YAFFS_TRACE_ERROR,
1264 ("yaffs: Could not add tnodes to management list" TENDSTR)));
1267 tnl->tnodes = newTnodes;
1268 tnl->next = dev->allocatedTnodeList;
1269 dev->allocatedTnodeList = tnl;
1272 T(YAFFS_TRACE_ALLOCATE, (TSTR("yaffs: Tnodes added" TENDSTR)));
1277 /* GetTnode gets us a clean tnode. Tries to make allocate more if we run out */
1279 static yaffs_Tnode *yaffs_GetTnodeRaw(yaffs_Device *dev)
1281 yaffs_Tnode *tn = NULL;
1283 /* If there are none left make more */
1284 if (!dev->freeTnodes)
1285 yaffs_CreateTnodes(dev, YAFFS_ALLOCATION_NTNODES);
1287 if (dev->freeTnodes) {
1288 tn = dev->freeTnodes;
1289 #ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
1290 if (tn->internal[YAFFS_NTNODES_INTERNAL] != (void *)1) {
1291 /* Hoosterman, this thing looks like it isn't in the list */
1292 T(YAFFS_TRACE_ALWAYS,
1293 (TSTR("yaffs: Tnode list bug 1" TENDSTR)));
1296 dev->freeTnodes = dev->freeTnodes->internal[0];
1300 dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
1305 static yaffs_Tnode *yaffs_GetTnode(yaffs_Device *dev)
1307 yaffs_Tnode *tn = yaffs_GetTnodeRaw(dev);
1308 int tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
1310 if (tnodeSize < sizeof(yaffs_Tnode))
1311 tnodeSize = sizeof(yaffs_Tnode);
1314 memset(tn, 0, tnodeSize);
1319 /* FreeTnode frees up a tnode and puts it back on the free list */
1320 static void yaffs_FreeTnode(yaffs_Device *dev, yaffs_Tnode *tn)
1323 #ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
1324 if (tn->internal[YAFFS_NTNODES_INTERNAL] != 0) {
1325 /* Hoosterman, this thing looks like it is already in the list */
1326 T(YAFFS_TRACE_ALWAYS,
1327 (TSTR("yaffs: Tnode list bug 2" TENDSTR)));
1329 tn->internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
1331 tn->internal[0] = dev->freeTnodes;
1332 dev->freeTnodes = tn;
1335 dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
1338 static void yaffs_DeinitialiseTnodes(yaffs_Device *dev)
1340 /* Free the list of allocated tnodes */
1341 yaffs_TnodeList *tmp;
1343 while (dev->allocatedTnodeList) {
1344 tmp = dev->allocatedTnodeList->next;
1346 YFREE(dev->allocatedTnodeList->tnodes);
1347 YFREE(dev->allocatedTnodeList);
1348 dev->allocatedTnodeList = tmp;
1352 dev->freeTnodes = NULL;
1353 dev->nFreeTnodes = 0;
1356 static void yaffs_InitialiseTnodes(yaffs_Device *dev)
1358 dev->allocatedTnodeList = NULL;
1359 dev->freeTnodes = NULL;
1360 dev->nFreeTnodes = 0;
1361 dev->nTnodesCreated = 0;
1365 void yaffs_LoadLevel0Tnode(yaffs_Device *dev, yaffs_Tnode *tn, unsigned pos,
1368 __u32 *map = (__u32 *)tn;
1374 pos &= YAFFS_TNODES_LEVEL0_MASK;
1375 val >>= dev->chunkGroupBits;
1377 bitInMap = pos * dev->tnodeWidth;
1378 wordInMap = bitInMap / 32;
1379 bitInWord = bitInMap & (32 - 1);
1381 mask = dev->tnodeMask << bitInWord;
1383 map[wordInMap] &= ~mask;
1384 map[wordInMap] |= (mask & (val << bitInWord));
1386 if (dev->tnodeWidth > (32 - bitInWord)) {
1387 bitInWord = (32 - bitInWord);
1389 mask = dev->tnodeMask >> (/*dev->tnodeWidth -*/ bitInWord);
1390 map[wordInMap] &= ~mask;
1391 map[wordInMap] |= (mask & (val >> bitInWord));
1395 static __u32 yaffs_GetChunkGroupBase(yaffs_Device *dev, yaffs_Tnode *tn,
1398 __u32 *map = (__u32 *)tn;
1404 pos &= YAFFS_TNODES_LEVEL0_MASK;
1406 bitInMap = pos * dev->tnodeWidth;
1407 wordInMap = bitInMap / 32;
1408 bitInWord = bitInMap & (32 - 1);
1410 val = map[wordInMap] >> bitInWord;
1412 if (dev->tnodeWidth > (32 - bitInWord)) {
1413 bitInWord = (32 - bitInWord);
1415 val |= (map[wordInMap] << bitInWord);
1418 val &= dev->tnodeMask;
1419 val <<= dev->chunkGroupBits;
1424 /* ------------------- End of individual tnode manipulation -----------------*/
1426 /* ---------Functions to manipulate the look-up tree (made up of tnodes) ------
1427 * The look up tree is represented by the top tnode and the number of topLevel
1428 * in the tree. 0 means only the level 0 tnode is in the tree.
1431 /* FindLevel0Tnode finds the level 0 tnode, if one exists. */
1432 static yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device *dev,
1433 yaffs_FileStructure *fStruct,
1436 yaffs_Tnode *tn = fStruct->top;
1438 int requiredTallness;
1439 int level = fStruct->topLevel;
1441 /* Check sane level and chunk Id */
1442 if (level < 0 || level > YAFFS_TNODES_MAX_LEVEL)
1445 if (chunkId > YAFFS_MAX_CHUNK_ID)
1448 /* First check we're tall enough (ie enough topLevel) */
1450 i = chunkId >> YAFFS_TNODES_LEVEL0_BITS;
1451 requiredTallness = 0;
1453 i >>= YAFFS_TNODES_INTERNAL_BITS;
1457 if (requiredTallness > fStruct->topLevel)
1458 return NULL; /* Not tall enough, so we can't find it */
1460 /* Traverse down to level 0 */
1461 while (level > 0 && tn) {
1462 tn = tn->internal[(chunkId >>
1463 (YAFFS_TNODES_LEVEL0_BITS +
1465 YAFFS_TNODES_INTERNAL_BITS)) &
1466 YAFFS_TNODES_INTERNAL_MASK];
1473 /* AddOrFindLevel0Tnode finds the level 0 tnode if it exists, otherwise first expands the tree.
1474 * This happens in two steps:
1475 * 1. If the tree isn't tall enough, then make it taller.
1476 * 2. Scan down the tree towards the level 0 tnode adding tnodes if required.
1478 * Used when modifying the tree.
1480 * If the tn argument is NULL, then a fresh tnode will be added otherwise the specified tn will
1481 * be plugged into the ttree.
1484 static yaffs_Tnode *yaffs_AddOrFindLevel0Tnode(yaffs_Device *dev,
1485 yaffs_FileStructure *fStruct,
1487 yaffs_Tnode *passedTn)
1489 int requiredTallness;
1497 /* Check sane level and page Id */
1498 if (fStruct->topLevel < 0 || fStruct->topLevel > YAFFS_TNODES_MAX_LEVEL)
1501 if (chunkId > YAFFS_MAX_CHUNK_ID)
1504 /* First check we're tall enough (ie enough topLevel) */
1506 x = chunkId >> YAFFS_TNODES_LEVEL0_BITS;
1507 requiredTallness = 0;
1509 x >>= YAFFS_TNODES_INTERNAL_BITS;
1514 if (requiredTallness > fStruct->topLevel) {
1515 /* Not tall enough, gotta make the tree taller */
1516 for (i = fStruct->topLevel; i < requiredTallness; i++) {
1518 tn = yaffs_GetTnode(dev);
1521 tn->internal[0] = fStruct->top;
1523 fStruct->topLevel++;
1525 T(YAFFS_TRACE_ERROR,
1526 (TSTR("yaffs: no more tnodes" TENDSTR)));
1532 /* Traverse down to level 0, adding anything we need */
1534 l = fStruct->topLevel;
1538 while (l > 0 && tn) {
1540 (YAFFS_TNODES_LEVEL0_BITS +
1541 (l - 1) * YAFFS_TNODES_INTERNAL_BITS)) &
1542 YAFFS_TNODES_INTERNAL_MASK;
1545 if ((l > 1) && !tn->internal[x]) {
1546 /* Add missing non-level-zero tnode */
1547 tn->internal[x] = yaffs_GetTnode(dev);
1548 if(!tn->internal[x])
1551 } else if (l == 1) {
1552 /* Looking from level 1 at level 0 */
1554 /* If we already have one, then release it.*/
1555 if (tn->internal[x])
1556 yaffs_FreeTnode(dev, tn->internal[x]);
1557 tn->internal[x] = passedTn;
1559 } else if (!tn->internal[x]) {
1560 /* Don't have one, none passed in */
1561 tn->internal[x] = yaffs_GetTnode(dev);
1562 if(!tn->internal[x])
1567 tn = tn->internal[x];
1571 /* top is level 0 */
1573 memcpy(tn, passedTn, (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8);
1574 yaffs_FreeTnode(dev, passedTn);
1581 static int yaffs_FindChunkInGroup(yaffs_Device *dev, int theChunk,
1582 yaffs_ExtendedTags *tags, int objectId,
1587 for (j = 0; theChunk && j < dev->chunkGroupSize; j++) {
1588 if (yaffs_CheckChunkBit(dev, theChunk / dev->nChunksPerBlock,
1589 theChunk % dev->nChunksPerBlock)) {
1591 if(dev->chunkGroupSize == 1)
1594 yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL,
1596 if (yaffs_TagsMatch(tags, objectId, chunkInInode)) {
1608 /* DeleteWorker scans backwards through the tnode tree and deletes all the
1609 * chunks and tnodes in the file
1610 * Returns 1 if the tree was deleted.
1611 * Returns 0 if it stopped early due to hitting the limit and the delete is incomplete.
1614 static int yaffs_DeleteWorker(yaffs_Object *in, yaffs_Tnode *tn, __u32 level,
1615 int chunkOffset, int *limit)
1620 yaffs_ExtendedTags tags;
1622 yaffs_Device *dev = in->myDev;
1628 for (i = YAFFS_NTNODES_INTERNAL - 1; allDone && i >= 0;
1630 if (tn->internal[i]) {
1631 if (limit && (*limit) < 0) {
1635 yaffs_DeleteWorker(in,
1643 YAFFS_TNODES_INTERNAL_BITS)
1648 yaffs_FreeTnode(dev,
1651 tn->internal[i] = NULL;
1655 return (allDone) ? 1 : 0;
1656 } else if (level == 0) {
1659 for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0 && !hitLimit;
1661 theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
1664 chunkInInode = (chunkOffset <<
1665 YAFFS_TNODES_LEVEL0_BITS) + i;
1668 yaffs_FindChunkInGroup(dev,
1674 if (foundChunk > 0) {
1675 yaffs_DeleteChunk(dev,
1680 *limit = *limit - 1;
1687 yaffs_LoadLevel0Tnode(dev, tn, i, 0);
1691 return (i < 0) ? 1 : 0;
1701 static void yaffs_SoftDeleteChunk(yaffs_Device *dev, int chunk)
1703 yaffs_BlockInfo *theBlock;
1705 T(YAFFS_TRACE_DELETION, (TSTR("soft delete chunk %d" TENDSTR), chunk));
1707 theBlock = yaffs_GetBlockInfo(dev, chunk / dev->nChunksPerBlock);
1709 theBlock->softDeletions++;
1714 /* SoftDeleteWorker scans backwards through the tnode tree and soft deletes all the chunks in the file.
1715 * All soft deleting does is increment the block's softdelete count and pulls the chunk out
1717 * Thus, essentially this is the same as DeleteWorker except that the chunks are soft deleted.
1720 static int yaffs_SoftDeleteWorker(yaffs_Object *in, yaffs_Tnode *tn,
1721 __u32 level, int chunkOffset)
1726 yaffs_Device *dev = in->myDev;
1731 for (i = YAFFS_NTNODES_INTERNAL - 1; allDone && i >= 0;
1733 if (tn->internal[i]) {
1735 yaffs_SoftDeleteWorker(in,
1741 YAFFS_TNODES_INTERNAL_BITS)
1744 yaffs_FreeTnode(dev,
1747 tn->internal[i] = NULL;
1749 /* Hoosterman... how could this happen? */
1753 return (allDone) ? 1 : 0;
1754 } else if (level == 0) {
1756 for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0; i--) {
1757 theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
1759 /* Note this does not find the real chunk, only the chunk group.
1760 * We make an assumption that a chunk group is not larger than
1763 yaffs_SoftDeleteChunk(dev, theChunk);
1764 yaffs_LoadLevel0Tnode(dev, tn, i, 0);
1778 static void yaffs_SoftDeleteFile(yaffs_Object *obj)
1781 obj->variantType == YAFFS_OBJECT_TYPE_FILE && !obj->softDeleted) {
1782 if (obj->nDataChunks <= 0) {
1783 /* Empty file with no duplicate object headers, just delete it immediately */
1784 yaffs_FreeTnode(obj->myDev,
1785 obj->variant.fileVariant.top);
1786 obj->variant.fileVariant.top = NULL;
1787 T(YAFFS_TRACE_TRACING,
1788 (TSTR("yaffs: Deleting empty file %d" TENDSTR),
1790 yaffs_DoGenericObjectDeletion(obj);
1792 yaffs_SoftDeleteWorker(obj,
1793 obj->variant.fileVariant.top,
1794 obj->variant.fileVariant.
1796 obj->softDeleted = 1;
1801 /* Pruning removes any part of the file structure tree that is beyond the
1802 * bounds of the file (ie that does not point to chunks).
1804 * A file should only get pruned when its size is reduced.
1806 * Before pruning, the chunks must be pulled from the tree and the
1807 * level 0 tnode entries must be zeroed out.
1808 * Could also use this for file deletion, but that's probably better handled
1809 * by a special case.
1812 static yaffs_Tnode *yaffs_PruneWorker(yaffs_Device *dev, yaffs_Tnode *tn,
1813 __u32 level, int del0)
1822 for (i = 0; i < YAFFS_NTNODES_INTERNAL; i++) {
1823 if (tn->internal[i]) {
1825 yaffs_PruneWorker(dev, tn->internal[i],
1827 (i == 0) ? del0 : 1);
1830 if (tn->internal[i])
1835 __u32 *map = (__u32 *)tn;
1836 tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
1838 if (tnodeSize < sizeof(yaffs_Tnode))
1839 tnodeSize = sizeof(yaffs_Tnode);
1840 tnodeSize /= sizeof(__u32);
1842 for(i = 0; !hasData && i < tnodeSize; i++){
1848 if (hasData == 0 && del0) {
1849 /* Free and return NULL */
1851 yaffs_FreeTnode(dev, tn);
1861 static int yaffs_PruneFileStructure(yaffs_Device *dev,
1862 yaffs_FileStructure *fStruct)
1869 if (fStruct->topLevel > 0) {
1871 yaffs_PruneWorker(dev, fStruct->top, fStruct->topLevel, 0);
1873 /* Now we have a tree with all the non-zero branches NULL but the height
1874 * is the same as it was.
1875 * Let's see if we can trim internal tnodes to shorten the tree.
1876 * We can do this if only the 0th element in the tnode is in use
1877 * (ie all the non-zero are NULL)
1880 while (fStruct->topLevel && !done) {
1884 for (i = 1; i < YAFFS_NTNODES_INTERNAL; i++) {
1885 if (tn->internal[i])
1890 fStruct->top = tn->internal[0];
1891 fStruct->topLevel--;
1892 yaffs_FreeTnode(dev, tn);
1902 /*-------------------- End of File Structure functions.-------------------*/
1904 /* yaffs_CreateFreeObjects creates a bunch more objects and
1905 * adds them to the object free list.
1907 static int yaffs_CreateFreeObjects(yaffs_Device *dev, int nObjects)
1910 yaffs_Object *newObjects;
1911 yaffs_ObjectList *list;
1916 /* make these things */
1917 newObjects = YMALLOC(nObjects * sizeof(yaffs_Object));
1918 list = YMALLOC(sizeof(yaffs_ObjectList));
1920 if (!newObjects || !list) {
1929 T(YAFFS_TRACE_ALLOCATE,
1930 (TSTR("yaffs: Could not allocate more objects" TENDSTR)));
1934 /* Hook them into the free list */
1935 for (i = 0; i < nObjects - 1; i++) {
1936 newObjects[i].siblings.next =
1937 (struct ylist_head *)(&newObjects[i + 1]);
1940 newObjects[nObjects - 1].siblings.next = (void *)dev->freeObjects;
1941 dev->freeObjects = newObjects;
1942 dev->nFreeObjects += nObjects;
1943 dev->nObjectsCreated += nObjects;
1945 /* Now add this bunch of Objects to a list for freeing up. */
1947 list->objects = newObjects;
1948 list->next = dev->allocatedObjectList;
1949 dev->allocatedObjectList = list;
1955 /* AllocateEmptyObject gets us a clean Object. Tries to make allocate more if we run out */
1956 static yaffs_Object *yaffs_AllocateEmptyObject(yaffs_Device *dev)
1958 yaffs_Object *tn = NULL;
1960 #ifdef VALGRIND_TEST
1961 tn = YMALLOC(sizeof(yaffs_Object));
1963 /* If there are none left make more */
1964 if (!dev->freeObjects)
1965 yaffs_CreateFreeObjects(dev, YAFFS_ALLOCATION_NOBJECTS);
1967 if (dev->freeObjects) {
1968 tn = dev->freeObjects;
1970 (yaffs_Object *) (dev->freeObjects->siblings.next);
1971 dev->nFreeObjects--;
1975 /* Now sweeten it up... */
1977 memset(tn, 0, sizeof(yaffs_Object));
1978 tn->beingCreated = 1;
1982 tn->variantType = YAFFS_OBJECT_TYPE_UNKNOWN;
1983 YINIT_LIST_HEAD(&(tn->hardLinks));
1984 YINIT_LIST_HEAD(&(tn->hashLink));
1985 YINIT_LIST_HEAD(&tn->siblings);
1988 /* Now make the directory sane */
1990 tn->parent = dev->rootDir;
1991 ylist_add(&(tn->siblings), &dev->rootDir->variant.directoryVariant.children);
1994 /* Add it to the lost and found directory.
1995 * NB Can't put root or lostNFound in lostNFound so
1996 * check if lostNFound exists first
1998 if (dev->lostNFoundDir)
1999 yaffs_AddObjectToDirectory(dev->lostNFoundDir, tn);
2001 tn->beingCreated = 0;
2004 dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
2009 static yaffs_Object *yaffs_CreateFakeDirectory(yaffs_Device *dev, int number,
2014 yaffs_CreateNewObject(dev, number, YAFFS_OBJECT_TYPE_DIRECTORY);
2016 obj->fake = 1; /* it is fake so it might have no NAND presence... */
2017 obj->renameAllowed = 0; /* ... and we're not allowed to rename it... */
2018 obj->unlinkAllowed = 0; /* ... or unlink it */
2021 obj->yst_mode = mode;
2023 obj->hdrChunk = 0; /* Not a valid chunk. */
2030 static void yaffs_UnhashObject(yaffs_Object *tn)
2033 yaffs_Device *dev = tn->myDev;
2035 /* If it is still linked into the bucket list, free from the list */
2036 if (!ylist_empty(&tn->hashLink)) {
2037 ylist_del_init(&tn->hashLink);
2038 bucket = yaffs_HashFunction(tn->objectId);
2039 dev->objectBucket[bucket].count--;
2043 /* FreeObject frees up a Object and puts it back on the free list */
2044 static void yaffs_FreeObject(yaffs_Object *tn)
2046 yaffs_Device *dev = tn->myDev;
2049 T(YAFFS_TRACE_OS, (TSTR("FreeObject %p inode %p"TENDSTR), tn, tn->myInode));
2054 if (!ylist_empty(&tn->siblings))
2060 /* We're still hooked up to a cached inode.
2061 * Don't delete now, but mark for later deletion
2063 tn->deferedFree = 1;
2068 yaffs_UnhashObject(tn);
2070 #ifdef VALGRIND_TEST
2074 /* Link into the free list. */
2075 tn->siblings.next = (struct ylist_head *)(dev->freeObjects);
2076 dev->freeObjects = tn;
2077 dev->nFreeObjects++;
2079 dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
2084 void yaffs_HandleDeferedFree(yaffs_Object *obj)
2086 if (obj->deferedFree)
2087 yaffs_FreeObject(obj);
2092 static void yaffs_DeinitialiseObjects(yaffs_Device *dev)
2094 /* Free the list of allocated Objects */
2096 yaffs_ObjectList *tmp;
2098 while (dev->allocatedObjectList) {
2099 tmp = dev->allocatedObjectList->next;
2100 YFREE(dev->allocatedObjectList->objects);
2101 YFREE(dev->allocatedObjectList);
2103 dev->allocatedObjectList = tmp;
2106 dev->freeObjects = NULL;
2107 dev->nFreeObjects = 0;
2110 static void yaffs_InitialiseObjects(yaffs_Device *dev)
2114 dev->allocatedObjectList = NULL;
2115 dev->freeObjects = NULL;
2116 dev->nFreeObjects = 0;
2118 for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
2119 YINIT_LIST_HEAD(&dev->objectBucket[i].list);
2120 dev->objectBucket[i].count = 0;
2124 static int yaffs_FindNiceObjectBucket(yaffs_Device *dev)
2129 int lowest = 999999;
2131 /* First let's see if we can find one that's empty. */
2133 for (i = 0; i < 10 && lowest > 0; i++) {
2135 x %= YAFFS_NOBJECT_BUCKETS;
2136 if (dev->objectBucket[x].count < lowest) {
2137 lowest = dev->objectBucket[x].count;
2143 /* If we didn't find an empty list, then try
2144 * looking a bit further for a short one
2147 for (i = 0; i < 10 && lowest > 3; i++) {
2149 x %= YAFFS_NOBJECT_BUCKETS;
2150 if (dev->objectBucket[x].count < lowest) {
2151 lowest = dev->objectBucket[x].count;
2160 static int yaffs_CreateNewObjectNumber(yaffs_Device *dev)
2162 int bucket = yaffs_FindNiceObjectBucket(dev);
2164 /* Now find an object value that has not already been taken
2165 * by scanning the list.
2169 struct ylist_head *i;
2171 __u32 n = (__u32) bucket;
2173 /* yaffs_CheckObjectHashSanity(); */
2177 n += YAFFS_NOBJECT_BUCKETS;
2178 if (1 || dev->objectBucket[bucket].count > 0) {
2179 ylist_for_each(i, &dev->objectBucket[bucket].list) {
2180 /* If there is already one in the list */
2181 if (i && ylist_entry(i, yaffs_Object,
2182 hashLink)->objectId == n) {
2192 static void yaffs_HashObject(yaffs_Object *in)
2194 int bucket = yaffs_HashFunction(in->objectId);
2195 yaffs_Device *dev = in->myDev;
2197 ylist_add(&in->hashLink, &dev->objectBucket[bucket].list);
2198 dev->objectBucket[bucket].count++;
2201 yaffs_Object *yaffs_FindObjectByNumber(yaffs_Device *dev, __u32 number)
2203 int bucket = yaffs_HashFunction(number);
2204 struct ylist_head *i;
2207 ylist_for_each(i, &dev->objectBucket[bucket].list) {
2208 /* Look if it is in the list */
2210 in = ylist_entry(i, yaffs_Object, hashLink);
2211 if (in->objectId == number) {
2213 /* Don't tell the VFS about this one if it is defered free */
2214 if (in->deferedFree)
2226 yaffs_Object *yaffs_CreateNewObject(yaffs_Device *dev, int number,
2227 yaffs_ObjectType type)
2229 yaffs_Object *theObject;
2230 yaffs_Tnode *tn = NULL;
2233 number = yaffs_CreateNewObjectNumber(dev);
2235 if (type == YAFFS_OBJECT_TYPE_FILE) {
2236 tn = yaffs_GetTnode(dev);
2241 theObject = yaffs_AllocateEmptyObject(dev);
2244 yaffs_FreeTnode(dev,tn);
2250 theObject->fake = 0;
2251 theObject->renameAllowed = 1;
2252 theObject->unlinkAllowed = 1;
2253 theObject->objectId = number;
2254 yaffs_HashObject(theObject);
2255 theObject->variantType = type;
2256 #ifdef CONFIG_YAFFS_WINCE
2257 yfsd_WinFileTimeNow(theObject->win_atime);
2258 theObject->win_ctime[0] = theObject->win_mtime[0] =
2259 theObject->win_atime[0];
2260 theObject->win_ctime[1] = theObject->win_mtime[1] =
2261 theObject->win_atime[1];
2265 theObject->yst_atime = theObject->yst_mtime =
2266 theObject->yst_ctime = Y_CURRENT_TIME;
2269 case YAFFS_OBJECT_TYPE_FILE:
2270 theObject->variant.fileVariant.fileSize = 0;
2271 theObject->variant.fileVariant.scannedFileSize = 0;
2272 theObject->variant.fileVariant.shrinkSize = 0xFFFFFFFF; /* max __u32 */
2273 theObject->variant.fileVariant.topLevel = 0;
2274 theObject->variant.fileVariant.top = tn;
2276 case YAFFS_OBJECT_TYPE_DIRECTORY:
2277 YINIT_LIST_HEAD(&theObject->variant.directoryVariant.
2280 case YAFFS_OBJECT_TYPE_SYMLINK:
2281 case YAFFS_OBJECT_TYPE_HARDLINK:
2282 case YAFFS_OBJECT_TYPE_SPECIAL:
2283 /* No action required */
2285 case YAFFS_OBJECT_TYPE_UNKNOWN:
2286 /* todo this should not happen */
2294 static yaffs_Object *yaffs_FindOrCreateObjectByNumber(yaffs_Device *dev,
2296 yaffs_ObjectType type)
2298 yaffs_Object *theObject = NULL;
2301 theObject = yaffs_FindObjectByNumber(dev, number);
2304 theObject = yaffs_CreateNewObject(dev, number, type);
2311 static YCHAR *yaffs_CloneString(const YCHAR *str)
2313 YCHAR *newStr = NULL;
2319 len = yaffs_strnlen(str,YAFFS_MAX_ALIAS_LENGTH);
2320 newStr = YMALLOC((len + 1) * sizeof(YCHAR));
2322 yaffs_strncpy(newStr, str,len);
2330 * Mknod (create) a new object.
2331 * equivalentObject only has meaning for a hard link;
2332 * aliasString only has meaning for a symlink.
2333 * rdev only has meaning for devices (a subset of special objects)
2336 static yaffs_Object *yaffs_MknodObject(yaffs_ObjectType type,
2337 yaffs_Object *parent,
2342 yaffs_Object *equivalentObject,
2343 const YCHAR *aliasString, __u32 rdev)
2348 yaffs_Device *dev = parent->myDev;
2350 /* Check if the entry exists. If it does then fail the call since we don't want a dup.*/
2351 if (yaffs_FindObjectByName(parent, name))
2354 if (type == YAFFS_OBJECT_TYPE_SYMLINK) {
2355 str = yaffs_CloneString(aliasString);
2360 in = yaffs_CreateNewObject(dev, -1, type);
2374 in->variantType = type;
2376 in->yst_mode = mode;
2378 #ifdef CONFIG_YAFFS_WINCE
2379 yfsd_WinFileTimeNow(in->win_atime);
2380 in->win_ctime[0] = in->win_mtime[0] = in->win_atime[0];
2381 in->win_ctime[1] = in->win_mtime[1] = in->win_atime[1];
2384 in->yst_atime = in->yst_mtime = in->yst_ctime = Y_CURRENT_TIME;
2386 in->yst_rdev = rdev;
2390 in->nDataChunks = 0;
2392 yaffs_SetObjectName(in, name);
2395 yaffs_AddObjectToDirectory(parent, in);
2397 in->myDev = parent->myDev;
2400 case YAFFS_OBJECT_TYPE_SYMLINK:
2401 in->variant.symLinkVariant.alias = str;
2403 case YAFFS_OBJECT_TYPE_HARDLINK:
2404 in->variant.hardLinkVariant.equivalentObject =
2406 in->variant.hardLinkVariant.equivalentObjectId =
2407 equivalentObject->objectId;
2408 ylist_add(&in->hardLinks, &equivalentObject->hardLinks);
2410 case YAFFS_OBJECT_TYPE_FILE:
2411 case YAFFS_OBJECT_TYPE_DIRECTORY:
2412 case YAFFS_OBJECT_TYPE_SPECIAL:
2413 case YAFFS_OBJECT_TYPE_UNKNOWN:
2418 if (yaffs_UpdateObjectHeader(in, name, 0, 0, 0) < 0) {
2419 /* Could not create the object header, fail the creation */
2420 yaffs_DeleteObject(in);
2424 yaffs_UpdateParent(parent);
2430 yaffs_Object *yaffs_MknodFile(yaffs_Object *parent, const YCHAR *name,
2431 __u32 mode, __u32 uid, __u32 gid)
2433 return yaffs_MknodObject(YAFFS_OBJECT_TYPE_FILE, parent, name, mode,
2434 uid, gid, NULL, NULL, 0);
2437 yaffs_Object *yaffs_MknodDirectory(yaffs_Object *parent, const YCHAR *name,
2438 __u32 mode, __u32 uid, __u32 gid)
2440 return yaffs_MknodObject(YAFFS_OBJECT_TYPE_DIRECTORY, parent, name,
2441 mode, uid, gid, NULL, NULL, 0);
2444 yaffs_Object *yaffs_MknodSpecial(yaffs_Object *parent, const YCHAR *name,
2445 __u32 mode, __u32 uid, __u32 gid, __u32 rdev)
2447 return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SPECIAL, parent, name, mode,
2448 uid, gid, NULL, NULL, rdev);
2451 yaffs_Object *yaffs_MknodSymLink(yaffs_Object *parent, const YCHAR *name,
2452 __u32 mode, __u32 uid, __u32 gid,
2455 return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SYMLINK, parent, name, mode,
2456 uid, gid, NULL, alias, 0);
2459 /* yaffs_Link returns the object id of the equivalent object.*/
2460 yaffs_Object *yaffs_Link(yaffs_Object *parent, const YCHAR *name,
2461 yaffs_Object *equivalentObject)
2463 /* Get the real object in case we were fed a hard link as an equivalent object */
2464 equivalentObject = yaffs_GetEquivalentObject(equivalentObject);
2466 if (yaffs_MknodObject
2467 (YAFFS_OBJECT_TYPE_HARDLINK, parent, name, 0, 0, 0,
2468 equivalentObject, NULL, 0)) {
2469 return equivalentObject;
2476 static int yaffs_ChangeObjectName(yaffs_Object *obj, yaffs_Object *newDir,
2477 const YCHAR *newName, int force, int shadows)
2482 yaffs_Object *existingTarget;
2485 newDir = obj->parent; /* use the old directory */
2487 if (newDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
2488 T(YAFFS_TRACE_ALWAYS,
2490 ("tragedy: yaffs_ChangeObjectName: newDir is not a directory"
2495 /* TODO: Do we need this different handling for YAFFS2 and YAFFS1?? */
2496 if (obj->myDev->isYaffs2)
2497 unlinkOp = (newDir == obj->myDev->unlinkedDir);
2499 unlinkOp = (newDir == obj->myDev->unlinkedDir
2500 && obj->variantType == YAFFS_OBJECT_TYPE_FILE);
2502 deleteOp = (newDir == obj->myDev->deletedDir);
2504 existingTarget = yaffs_FindObjectByName(newDir, newName);
2506 /* If the object is a file going into the unlinked directory,
2507 * then it is OK to just stuff it in since duplicate names are allowed.
2508 * else only proceed if the new name does not exist and if we're putting
2509 * it into a directory.
2516 newDir->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) {
2517 yaffs_SetObjectName(obj, newName);
2520 yaffs_AddObjectToDirectory(newDir, obj);
2525 /* If it is a deletion then we mark it as a shrink for gc purposes. */
2526 if (yaffs_UpdateObjectHeader(obj, newName, 0, deleteOp, shadows) >= 0)
2533 int yaffs_RenameObject(yaffs_Object *oldDir, const YCHAR *oldName,
2534 yaffs_Object *newDir, const YCHAR *newName)
2536 yaffs_Object *obj = NULL;
2537 yaffs_Object *existingTarget = NULL;
2543 if (!oldDir || oldDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
2545 if (!newDir || newDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
2548 dev = oldDir->myDev;
2550 #ifdef CONFIG_YAFFS_CASE_INSENSITIVE
2551 /* Special case for case insemsitive systems (eg. WinCE).
2552 * While look-up is case insensitive, the name isn't.
2553 * Therefore we might want to change x.txt to X.txt
2555 if (oldDir == newDir && yaffs_strcmp(oldName, newName) == 0)
2559 if(yaffs_strnlen(newName,YAFFS_MAX_NAME_LENGTH+1) > YAFFS_MAX_NAME_LENGTH)
2563 obj = yaffs_FindObjectByName(oldDir, oldName);
2565 if (obj && obj->renameAllowed) {
2567 /* Now do the handling for an existing target, if there is one */
2569 existingTarget = yaffs_FindObjectByName(newDir, newName);
2570 if (existingTarget &&
2571 existingTarget->variantType == YAFFS_OBJECT_TYPE_DIRECTORY &&
2572 !ylist_empty(&existingTarget->variant.directoryVariant.children)) {
2573 /* There is a target that is a non-empty directory, so we fail */
2574 return YAFFS_FAIL; /* EEXIST or ENOTEMPTY */
2575 } else if (existingTarget && existingTarget != obj) {
2576 /* Nuke the target first, using shadowing,
2577 * but only if it isn't the same object.
2579 * Note we must disable gc otherwise it can mess up the shadowing.
2583 yaffs_ChangeObjectName(obj, newDir, newName, force,
2584 existingTarget->objectId);
2585 existingTarget->isShadowed = 1;
2586 yaffs_UnlinkObject(existingTarget);
2590 result = yaffs_ChangeObjectName(obj, newDir, newName, 1, 0);
2592 yaffs_UpdateParent(oldDir);
2593 if(newDir != oldDir)
2594 yaffs_UpdateParent(newDir);
2601 /*------------------------- Block Management and Page Allocation ----------------*/
2603 static int yaffs_InitialiseBlocks(yaffs_Device *dev)
2605 int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1;
2607 dev->blockInfo = NULL;
2608 dev->chunkBits = NULL;
2610 dev->allocationBlock = -1; /* force it to get a new one */
2612 /* If the first allocation strategy fails, thry the alternate one */
2613 dev->blockInfo = YMALLOC(nBlocks * sizeof(yaffs_BlockInfo));
2614 if (!dev->blockInfo) {
2615 dev->blockInfo = YMALLOC_ALT(nBlocks * sizeof(yaffs_BlockInfo));
2616 dev->blockInfoAlt = 1;
2618 dev->blockInfoAlt = 0;
2620 if (dev->blockInfo) {
2621 /* Set up dynamic blockinfo stuff. */
2622 dev->chunkBitmapStride = (dev->nChunksPerBlock + 7) / 8; /* round up bytes */
2623 dev->chunkBits = YMALLOC(dev->chunkBitmapStride * nBlocks);
2624 if (!dev->chunkBits) {
2625 dev->chunkBits = YMALLOC_ALT(dev->chunkBitmapStride * nBlocks);
2626 dev->chunkBitsAlt = 1;
2628 dev->chunkBitsAlt = 0;
2631 if (dev->blockInfo && dev->chunkBits) {
2632 memset(dev->blockInfo, 0, nBlocks * sizeof(yaffs_BlockInfo));
2633 memset(dev->chunkBits, 0, dev->chunkBitmapStride * nBlocks);
2640 static void yaffs_DeinitialiseBlocks(yaffs_Device *dev)
2642 if (dev->blockInfoAlt && dev->blockInfo)
2643 YFREE_ALT(dev->blockInfo);
2644 else if (dev->blockInfo)
2645 YFREE(dev->blockInfo);
2647 dev->blockInfoAlt = 0;
2649 dev->blockInfo = NULL;
2651 if (dev->chunkBitsAlt && dev->chunkBits)
2652 YFREE_ALT(dev->chunkBits);
2653 else if (dev->chunkBits)
2654 YFREE(dev->chunkBits);
2655 dev->chunkBitsAlt = 0;
2656 dev->chunkBits = NULL;
2659 static int yaffs_BlockNotDisqualifiedFromGC(yaffs_Device *dev,
2660 yaffs_BlockInfo *bi)
2667 return 1; /* disqualification only applies to yaffs2. */
2669 if (!bi->hasShrinkHeader)
2670 return 1; /* can gc */
2672 /* Find the oldest dirty sequence number if we don't know it and save it
2673 * so we don't have to keep recomputing it.
2675 if (!dev->oldestDirtySequence) {
2676 seq = dev->sequenceNumber;
2678 for (i = dev->internalStartBlock; i <= dev->internalEndBlock;
2680 b = yaffs_GetBlockInfo(dev, i);
2681 if (b->blockState == YAFFS_BLOCK_STATE_FULL &&
2682 (b->pagesInUse - b->softDeletions) <
2683 dev->nChunksPerBlock && b->sequenceNumber < seq) {
2684 seq = b->sequenceNumber;
2687 dev->oldestDirtySequence = seq;
2690 /* Can't do gc of this block if there are any blocks older than this one that have
2693 return (bi->sequenceNumber <= dev->oldestDirtySequence);
2696 /* FindDiretiestBlock is used to select the dirtiest block (or close enough)
2697 * for garbage collection.
2700 static int yaffs_FindBlockForGarbageCollection(yaffs_Device *dev,
2703 int b = dev->currentDirtyChecker;
2709 int prioritised = 0;
2710 yaffs_BlockInfo *bi;
2711 int pendingPrioritisedExist = 0;
2713 /* First let's see if we need to grab a prioritised block */
2714 if (dev->hasPendingPrioritisedGCs) {
2715 for (i = dev->internalStartBlock; i < dev->internalEndBlock && !prioritised; i++) {
2717 bi = yaffs_GetBlockInfo(dev, i);
2718 /* yaffs_VerifyBlock(dev,bi,i); */
2720 if (bi->gcPrioritise) {
2721 pendingPrioritisedExist = 1;
2722 if (bi->blockState == YAFFS_BLOCK_STATE_FULL &&
2723 yaffs_BlockNotDisqualifiedFromGC(dev, bi)) {
2724 pagesInUse = (bi->pagesInUse - bi->softDeletions);
2727 aggressive = 1; /* Fool the non-aggressive skip logiv below */
2732 if (!pendingPrioritisedExist) /* None found, so we can clear this */
2733 dev->hasPendingPrioritisedGCs = 0;
2736 /* If we're doing aggressive GC then we are happy to take a less-dirty block, and
2738 * else (we're doing a leasurely gc), then we only bother to do this if the
2739 * block has only a few pages in use.
2742 dev->nonAggressiveSkip--;
2744 if (!aggressive && (dev->nonAggressiveSkip > 0))
2749 (aggressive) ? dev->nChunksPerBlock : YAFFS_PASSIVE_GC_CHUNKS + 1;
2753 dev->internalEndBlock - dev->internalStartBlock + 1;
2756 dev->internalEndBlock - dev->internalStartBlock + 1;
2757 iterations = iterations / 16;
2758 if (iterations > 200)
2762 for (i = 0; i <= iterations && pagesInUse > 0 && !prioritised; i++) {
2764 if (b < dev->internalStartBlock || b > dev->internalEndBlock)
2765 b = dev->internalStartBlock;
2767 if (b < dev->internalStartBlock || b > dev->internalEndBlock) {
2768 T(YAFFS_TRACE_ERROR,
2769 (TSTR("**>> Block %d is not valid" TENDSTR), b));
2773 bi = yaffs_GetBlockInfo(dev, b);
2775 if (bi->blockState == YAFFS_BLOCK_STATE_FULL &&
2776 (bi->pagesInUse - bi->softDeletions) < pagesInUse &&
2777 yaffs_BlockNotDisqualifiedFromGC(dev, bi)) {
2779 pagesInUse = (bi->pagesInUse - bi->softDeletions);
2783 dev->currentDirtyChecker = b;
2787 (TSTR("GC Selected block %d with %d free, prioritised:%d" TENDSTR), dirtiest,
2788 dev->nChunksPerBlock - pagesInUse, prioritised));
2791 dev->oldestDirtySequence = 0;
2794 dev->nonAggressiveSkip = 4;
2799 static void yaffs_BlockBecameDirty(yaffs_Device *dev, int blockNo)
2801 yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockNo);
2805 /* If the block is still healthy erase it and mark as clean.
2806 * If the block has had a data failure, then retire it.
2809 T(YAFFS_TRACE_GC | YAFFS_TRACE_ERASE,
2810 (TSTR("yaffs_BlockBecameDirty block %d state %d %s"TENDSTR),
2811 blockNo, bi->blockState, (bi->needsRetiring) ? "needs retiring" : ""));
2813 bi->blockState = YAFFS_BLOCK_STATE_DIRTY;
2815 if (!bi->needsRetiring) {
2816 yaffs_InvalidateCheckpoint(dev);
2817 erasedOk = yaffs_EraseBlockInNAND(dev, blockNo);
2819 dev->nErasureFailures++;
2820 T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
2821 (TSTR("**>> Erasure failed %d" TENDSTR), blockNo));
2826 ((yaffs_traceMask & YAFFS_TRACE_ERASE) || !yaffs_SkipVerification(dev))) {
2828 for (i = 0; i < dev->nChunksPerBlock; i++) {
2829 if (!yaffs_CheckChunkErased
2830 (dev, blockNo * dev->nChunksPerBlock + i)) {
2831 T(YAFFS_TRACE_ERROR,
2833 (">>Block %d erasure supposedly OK, but chunk %d not erased"
2834 TENDSTR), blockNo, i));
2840 /* Clean it up... */
2841 bi->blockState = YAFFS_BLOCK_STATE_EMPTY;
2842 dev->nErasedBlocks++;
2844 bi->softDeletions = 0;
2845 bi->hasShrinkHeader = 0;
2846 bi->skipErasedCheck = 1; /* This is clean, so no need to check */
2847 bi->gcPrioritise = 0;
2848 yaffs_ClearChunkBits(dev, blockNo);
2850 T(YAFFS_TRACE_ERASE,
2851 (TSTR("Erased block %d" TENDSTR), blockNo));
2853 dev->nFreeChunks -= dev->nChunksPerBlock; /* We lost a block of free space */
2855 yaffs_RetireBlock(dev, blockNo);
2856 T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
2857 (TSTR("**>> Block %d retired" TENDSTR), blockNo));
2861 static int yaffs_FindBlockForAllocation(yaffs_Device *dev)
2865 yaffs_BlockInfo *bi;
2867 if (dev->nErasedBlocks < 1) {
2868 /* Hoosterman we've got a problem.
2869 * Can't get space to gc
2871 T(YAFFS_TRACE_ERROR,
2872 (TSTR("yaffs tragedy: no more erased blocks" TENDSTR)));
2877 /* Find an empty block. */
2879 for (i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) {
2880 dev->allocationBlockFinder++;
2881 if (dev->allocationBlockFinder < dev->internalStartBlock
2882 || dev->allocationBlockFinder > dev->internalEndBlock) {
2883 dev->allocationBlockFinder = dev->internalStartBlock;
2886 bi = yaffs_GetBlockInfo(dev, dev->allocationBlockFinder);
2888 if (bi->blockState == YAFFS_BLOCK_STATE_EMPTY) {
2889 bi->blockState = YAFFS_BLOCK_STATE_ALLOCATING;
2890 dev->sequenceNumber++;
2891 bi->sequenceNumber = dev->sequenceNumber;
2892 dev->nErasedBlocks--;
2893 T(YAFFS_TRACE_ALLOCATE,
2894 (TSTR("Allocated block %d, seq %d, %d left" TENDSTR),
2895 dev->allocationBlockFinder, dev->sequenceNumber,
2896 dev->nErasedBlocks));
2897 return dev->allocationBlockFinder;
2901 T(YAFFS_TRACE_ALWAYS,
2903 ("yaffs tragedy: no more erased blocks, but there should have been %d"
2904 TENDSTR), dev->nErasedBlocks));
2911 static int yaffs_CalcCheckpointBlocksRequired(yaffs_Device *dev)
2913 if (!dev->nCheckpointBlocksRequired &&
2915 /* Not a valid value so recalculate */
2918 int devBlocks = (dev->endBlock - dev->startBlock + 1);
2921 tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
2923 if (tnodeSize < sizeof(yaffs_Tnode))
2924 tnodeSize = sizeof(yaffs_Tnode);
2926 nBytes += sizeof(yaffs_CheckpointValidity);
2927 nBytes += sizeof(yaffs_CheckpointDevice);
2928 nBytes += devBlocks * sizeof(yaffs_BlockInfo);
2929 nBytes += devBlocks * dev->chunkBitmapStride;
2930 nBytes += (sizeof(yaffs_CheckpointObject) + sizeof(__u32)) * (dev->nObjectsCreated - dev->nFreeObjects);
2931 nBytes += (tnodeSize + sizeof(__u32)) * (dev->nTnodesCreated - dev->nFreeTnodes);
2932 nBytes += sizeof(yaffs_CheckpointValidity);
2933 nBytes += sizeof(__u32); /* checksum*/
2935 /* Round up and add 2 blocks to allow for some bad blocks, so add 3 */
2937 nBlocks = (nBytes/(dev->nDataBytesPerChunk * dev->nChunksPerBlock)) + 3;
2939 dev->nCheckpointBlocksRequired = nBlocks;
2942 return dev->nCheckpointBlocksRequired;
2946 * Check if there's space to allocate...
2947 * Thinks.... do we need top make this ths same as yaffs_GetFreeChunks()?
2949 static int yaffs_CheckSpaceForAllocation(yaffs_Device *dev)
2952 int reservedBlocks = dev->nReservedBlocks;
2953 int checkpointBlocks;
2955 if (dev->isYaffs2) {
2956 checkpointBlocks = yaffs_CalcCheckpointBlocksRequired(dev) -
2957 dev->blocksInCheckpoint;
2958 if (checkpointBlocks < 0)
2959 checkpointBlocks = 0;
2961 checkpointBlocks = 0;
2964 reservedChunks = ((reservedBlocks + checkpointBlocks) * dev->nChunksPerBlock);
2966 return (dev->nFreeChunks > reservedChunks);
2969 static int yaffs_AllocateChunk(yaffs_Device *dev, int useReserve,
2970 yaffs_BlockInfo **blockUsedPtr)
2973 yaffs_BlockInfo *bi;
2975 if (dev->allocationBlock < 0) {
2976 /* Get next block to allocate off */
2977 dev->allocationBlock = yaffs_FindBlockForAllocation(dev);
2978 dev->allocationPage = 0;
2981 if (!useReserve && !yaffs_CheckSpaceForAllocation(dev)) {
2982 /* Not enough space to allocate unless we're allowed to use the reserve. */
2986 if (dev->nErasedBlocks < dev->nReservedBlocks
2987 && dev->allocationPage == 0) {
2988 T(YAFFS_TRACE_ALLOCATE, (TSTR("Allocating reserve" TENDSTR)));
2991 /* Next page please.... */
2992 if (dev->allocationBlock >= 0) {
2993 bi = yaffs_GetBlockInfo(dev, dev->allocationBlock);
2995 retVal = (dev->allocationBlock * dev->nChunksPerBlock) +
2996 dev->allocationPage;
2998 yaffs_SetChunkBit(dev, dev->allocationBlock,
2999 dev->allocationPage);
3001 dev->allocationPage++;
3005 /* If the block is full set the state to full */
3006 if (dev->allocationPage >= dev->nChunksPerBlock) {
3007 bi->blockState = YAFFS_BLOCK_STATE_FULL;
3008 dev->allocationBlock = -1;
3017 T(YAFFS_TRACE_ERROR,
3018 (TSTR("!!!!!!!!! Allocator out !!!!!!!!!!!!!!!!!" TENDSTR)));
3023 static int yaffs_GetErasedChunks(yaffs_Device *dev)
3027 n = dev->nErasedBlocks * dev->nChunksPerBlock;
3029 if (dev->allocationBlock > 0)
3030 n += (dev->nChunksPerBlock - dev->allocationPage);
3037 * yaffs_SkipRestOfBlock() skips over the rest of the allocation block
3038 * if we don't want to write to it.
3040 static void yaffs_SkipRestOfBlock(yaffs_Device *dev)
3042 if(dev->allocationBlock > 0){
3043 yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, dev->allocationBlock);
3044 if(bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING){
3045 bi->blockState = YAFFS_BLOCK_STATE_FULL;
3046 dev->allocationBlock = -1;
3052 static int yaffs_GarbageCollectBlock(yaffs_Device *dev, int block,
3058 int retVal = YAFFS_OK;
3061 int isCheckpointBlock;
3065 int chunksBefore = yaffs_GetErasedChunks(dev);
3068 yaffs_ExtendedTags tags;
3070 yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, block);
3072 yaffs_Object *object;
3074 isCheckpointBlock = (bi->blockState == YAFFS_BLOCK_STATE_CHECKPOINT);
3077 T(YAFFS_TRACE_TRACING,
3078 (TSTR("Collecting block %d, in use %d, shrink %d, wholeBlock %d" TENDSTR),
3081 bi->hasShrinkHeader,
3084 /*yaffs_VerifyFreeChunks(dev); */
3086 if(bi->blockState == YAFFS_BLOCK_STATE_FULL)
3087 bi->blockState = YAFFS_BLOCK_STATE_COLLECTING;
3089 bi->hasShrinkHeader = 0; /* clear the flag so that the block can erase */
3091 /* Take off the number of soft deleted entries because
3092 * they're going to get really deleted during GC.
3094 if(dev->gcChunk == 0) /* first time through for this block */
3095 dev->nFreeChunks -= bi->softDeletions;
3099 if (isCheckpointBlock ||
3100 !yaffs_StillSomeChunkBits(dev, block)) {
3101 T(YAFFS_TRACE_TRACING,
3103 ("Collecting block %d that has no chunks in use" TENDSTR),
3105 yaffs_BlockBecameDirty(dev, block);
3108 __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__);
3110 yaffs_VerifyBlock(dev, bi, block);
3112 maxCopies = (wholeBlock) ? dev->nChunksPerBlock : 10;
3113 oldChunk = block * dev->nChunksPerBlock + dev->gcChunk;
3115 for (/* init already done */;
3116 retVal == YAFFS_OK &&
3117 dev->gcChunk < dev->nChunksPerBlock &&
3118 (bi->blockState == YAFFS_BLOCK_STATE_COLLECTING) &&
3120 dev->gcChunk++, oldChunk++) {
3121 if (yaffs_CheckChunkBit(dev, block, dev->gcChunk)) {
3123 /* This page is in use and might need to be copied off */
3129 yaffs_InitialiseTags(&tags);
3131 yaffs_ReadChunkWithTagsFromNAND(dev, oldChunk,
3135 yaffs_FindObjectByNumber(dev,
3138 T(YAFFS_TRACE_GC_DETAIL,
3140 ("Collecting chunk in block %d, %d %d %d " TENDSTR),
3141 dev->gcChunk, tags.objectId, tags.chunkId,
3144 if (object && !yaffs_SkipVerification(dev)) {
3145 if (tags.chunkId == 0)
3146 matchingChunk = object->hdrChunk;
3147 else if (object->softDeleted)
3148 matchingChunk = oldChunk; /* Defeat the test */
3150 matchingChunk = yaffs_FindChunkInFile(object, tags.chunkId, NULL);
3152 if (oldChunk != matchingChunk)
3153 T(YAFFS_TRACE_ERROR,
3154 (TSTR("gc: page in gc mismatch: %d %d %d %d"TENDSTR),
3155 oldChunk, matchingChunk, tags.objectId, tags.chunkId));
3160 T(YAFFS_TRACE_ERROR,
3162 ("page %d in gc has no object: %d %d %d "
3164 tags.objectId, tags.chunkId, tags.byteCount));
3169 object->softDeleted &&
3170 tags.chunkId != 0) {
3171 /* Data chunk in a soft deleted file, throw it away
3172 * It's a soft deleted data chunk,
3173 * No need to copy this, just forget about it and
3174 * fix up the object.
3177 object->nDataChunks--;
3179 if (object->nDataChunks <= 0) {
3180 /* remeber to clean up the object */
3181 dev->gcCleanupList[cleanups] =
3187 /* Todo object && object->deleted && object->nDataChunks == 0 */
3188 /* Deleted object header with no data chunks.
3189 * Can be discarded and the file deleted.
3191 object->hdrChunk = 0;
3192 yaffs_FreeTnode(object->myDev,
3195 object->variant.fileVariant.top = NULL;
3196 yaffs_DoGenericObjectDeletion(object);
3198 } else if (object) {
3199 /* It's either a data chunk in a live file or
3200 * an ObjectHeader, so we're interested in it.
3201 * NB Need to keep the ObjectHeaders of deleted files
3202 * until the whole file has been deleted off
3204 tags.serialNumber++;
3208 if (tags.chunkId == 0) {
3209 /* It is an object Id,
3210 * We need to nuke the shrinkheader flags first
3211 * Also need to clean up shadowing.
3212 * We no longer want the shrinkHeader flag since its work is done
3213 * and if it is left in place it will mess up scanning.
3216 yaffs_ObjectHeader *oh;
3217 oh = (yaffs_ObjectHeader *)buffer;
3219 tags.extraIsShrinkHeader = 0;
3220 oh->shadowsObject = 0;
3221 oh->inbandShadowsObject = 0;
3222 tags.extraShadows = 0;
3224 yaffs_VerifyObjectHeader(object, oh, &tags, 1);
3228 yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &tags, 1);
3231 retVal = YAFFS_FAIL;
3234 /* Ok, now fix up the Tnodes etc. */
3236 if (tags.chunkId == 0) {
3238 object->hdrChunk = newChunk;
3239 object->serial = tags.serialNumber;
3241 /* It's a data chunk */
3242 yaffs_PutChunkIntoFile
3250 if (retVal == YAFFS_OK)
3251 yaffs_DeleteChunk(dev, oldChunk, markNAND, __LINE__);
3256 yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
3259 /* Do any required cleanups */
3260 for (i = 0; i < cleanups; i++) {
3261 /* Time to delete the file too */
3263 yaffs_FindObjectByNumber(dev,
3264 dev->gcCleanupList[i]);
3266 yaffs_FreeTnode(dev,
3267 object->variant.fileVariant.
3269 object->variant.fileVariant.top = NULL;
3272 ("yaffs: About to finally delete object %d"
3273 TENDSTR), object->objectId));
3274 yaffs_DoGenericObjectDeletion(object);
3275 object->myDev->nDeletedFiles--;
3282 yaffs_VerifyCollectedBlock(dev, bi, block);
3284 chunksAfter = yaffs_GetErasedChunks(dev);
3285 if (chunksBefore >= chunksAfter) {
3288 ("gc did not increase free chunks before %d after %d"
3289 TENDSTR), chunksBefore, chunksAfter));
3292 /* If the gc completed then clear the current gcBlock so that we find another. */
3293 if (bi->blockState != YAFFS_BLOCK_STATE_COLLECTING) {
3303 /* New garbage collector
3304 * If we're very low on erased blocks then we do aggressive garbage collection
3305 * otherwise we do "leasurely" garbage collection.
3306 * Aggressive gc looks further (whole array) and will accept less dirty blocks.
3307 * Passive gc only inspects smaller areas and will only accept more dirty blocks.
3309 * The idea is to help clear out space in a more spread-out manner.
3310 * Dunno if it really does anything useful.
3312 static int yaffs_CheckGarbageCollection(yaffs_Device *dev)
3316 int gcOk = YAFFS_OK;
3319 int checkpointBlockAdjust;
3321 if (dev->isDoingGC) {
3322 /* Bail out so we don't get recursive gc */
3326 /* This loop should pass the first time.
3327 * We'll only see looping here if the erase of the collected block fails.
3333 checkpointBlockAdjust = yaffs_CalcCheckpointBlocksRequired(dev) - dev->blocksInCheckpoint;
3334 if (checkpointBlockAdjust < 0)
3335 checkpointBlockAdjust = 0;
3337 if (dev->nErasedBlocks < (dev->nReservedBlocks + checkpointBlockAdjust + 2)) {
3338 /* We need a block soon...*/
3341 /* We're in no hurry */
3345 if (dev->gcBlock <= 0) {
3346 dev->gcBlock = yaffs_FindBlockForGarbageCollection(dev, aggressive);
3350 block = dev->gcBlock;
3353 dev->garbageCollections++;
3355 dev->passiveGarbageCollections++;
3359 ("yaffs: GC erasedBlocks %d aggressive %d" TENDSTR),
3360 dev->nErasedBlocks, aggressive));
3362 gcOk = yaffs_GarbageCollectBlock(dev, block, aggressive);
3365 if (dev->nErasedBlocks < (dev->nReservedBlocks) && block > 0) {
3368 ("yaffs: GC !!!no reclaim!!! erasedBlocks %d after try %d block %d"
3369 TENDSTR), dev->nErasedBlocks, maxTries, block));
3371 } while ((dev->nErasedBlocks < dev->nReservedBlocks) &&
3375 return aggressive ? gcOk : YAFFS_OK;
3378 /*------------------------- TAGS --------------------------------*/
3380 static int yaffs_TagsMatch(const yaffs_ExtendedTags *tags, int objectId,
3383 return (tags->chunkId == chunkInObject &&
3384 tags->objectId == objectId && !tags->chunkDeleted) ? 1 : 0;
3389 /*-------------------- Data file manipulation -----------------*/
3391 static int yaffs_FindChunkInFile(yaffs_Object *in, int chunkInInode,
3392 yaffs_ExtendedTags *tags)
3394 /*Get the Tnode, then get the level 0 offset chunk offset */
3397 yaffs_ExtendedTags localTags;
3400 yaffs_Device *dev = in->myDev;
3403 /* Passed a NULL, so use our own tags space */
3407 tn = yaffs_FindLevel0Tnode(dev, &in->variant.fileVariant, chunkInInode);
3410 theChunk = yaffs_GetChunkGroupBase(dev, tn, chunkInInode);
3413 yaffs_FindChunkInGroup(dev, theChunk, tags, in->objectId,
3419 static int yaffs_FindAndDeleteChunkInFile(yaffs_Object *in, int chunkInInode,
3420 yaffs_ExtendedTags *tags)
3422 /* Get the Tnode, then get the level 0 offset chunk offset */
3425 yaffs_ExtendedTags localTags;
3427 yaffs_Device *dev = in->myDev;
3431 /* Passed a NULL, so use our own tags space */
3435 tn = yaffs_FindLevel0Tnode(dev, &in->variant.fileVariant, chunkInInode);
3439 theChunk = yaffs_GetChunkGroupBase(dev, tn, chunkInInode);
3442 yaffs_FindChunkInGroup(dev, theChunk, tags, in->objectId,
3445 /* Delete the entry in the filestructure (if found) */
3447 yaffs_LoadLevel0Tnode(dev, tn, chunkInInode, 0);
3453 #ifdef YAFFS_PARANOID
3455 static int yaffs_CheckFileSanity(yaffs_Object *in)
3463 yaffs_Tags localTags;
3464 yaffs_Tags *tags = &localTags;
3468 if (in->variantType != YAFFS_OBJECT_TYPE_FILE)
3471 objId = in->objectId;
3472 fSize = in->variant.fileVariant.fileSize;
3474 (fSize + in->myDev->nDataBytesPerChunk - 1) / in->myDev->nDataBytesPerChunk;
3476 for (chunk = 1; chunk <= nChunks; chunk++) {
3477 tn = yaffs_FindLevel0Tnode(in->myDev, &in->variant.fileVariant,
3482 theChunk = yaffs_GetChunkGroupBase(dev, tn, chunk);
3484 if (yaffs_CheckChunkBits
3485 (dev, theChunk / dev->nChunksPerBlock,
3486 theChunk % dev->nChunksPerBlock)) {
3488 yaffs_ReadChunkTagsFromNAND(in->myDev, theChunk,
3492 (tags, in->objectId, chunk, chunkDeleted)) {
3502 /* T(("No level 0 found for %d\n", chunk)); */
3506 return failed ? YAFFS_FAIL : YAFFS_OK;
3511 static int yaffs_PutChunkIntoFile(yaffs_Object *in, int chunkInInode,
3512 int chunkInNAND, int inScan)
3514 /* NB inScan is zero unless scanning.
3515 * For forward scanning, inScan is > 0;
3516 * for backward scanning inScan is < 0
3518 * chunkInNAND = 0 is a dummy insert to make sure the tnodes are there.
3522 yaffs_Device *dev = in->myDev;
3524 yaffs_ExtendedTags existingTags;
3525 yaffs_ExtendedTags newTags;
3526 unsigned existingSerial, newSerial;
3528 if (in->variantType != YAFFS_OBJECT_TYPE_FILE) {
3529 /* Just ignore an attempt at putting a chunk into a non-file during scanning
3530 * If it is not during Scanning then something went wrong!
3533 T(YAFFS_TRACE_ERROR,
3535 ("yaffs tragedy:attempt to put data chunk into a non-file"
3540 yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__);
3544 tn = yaffs_AddOrFindLevel0Tnode(dev,
3545 &in->variant.fileVariant,
3552 /* Dummy insert, bail now */
3556 existingChunk = yaffs_GetChunkGroupBase(dev, tn, chunkInInode);
3559 /* If we're scanning then we need to test for duplicates
3560 * NB This does not need to be efficient since it should only ever
3561 * happen when the power fails during a write, then only one
3562 * chunk should ever be affected.
3564 * Correction for YAFFS2: This could happen quite a lot and we need to think about efficiency! TODO
3565 * Update: For backward scanning we don't need to re-read tags so this is quite cheap.
3568 if (existingChunk > 0) {
3569 /* NB Right now existing chunk will not be real chunkId if the device >= 32MB
3570 * thus we have to do a FindChunkInFile to get the real chunk id.
3572 * We have a duplicate now we need to decide which one to use:
3574 * Backwards scanning YAFFS2: The old one is what we use, dump the new one.
3575 * Forward scanning YAFFS2: The new one is what we use, dump the old one.
3576 * YAFFS1: Get both sets of tags and compare serial numbers.
3580 /* Only do this for forward scanning */
3581 yaffs_ReadChunkWithTagsFromNAND(dev,
3585 /* Do a proper find */
3587 yaffs_FindChunkInFile(in, chunkInInode,
3591 if (existingChunk <= 0) {
3592 /*Hoosterman - how did this happen? */
3594 T(YAFFS_TRACE_ERROR,
3596 ("yaffs tragedy: existing chunk < 0 in scan"
3601 /* NB The deleted flags should be false, otherwise the chunks will
3602 * not be loaded during a scan
3606 newSerial = newTags.serialNumber;
3607 existingSerial = existingTags.serialNumber;
3611 (in->myDev->isYaffs2 ||
3612 existingChunk <= 0 ||
3613 ((existingSerial + 1) & 3) == newSerial)) {
3614 /* Forward scanning.
3616 * Delete the old one and drop through to update the tnode
3618 yaffs_DeleteChunk(dev, existingChunk, 1,
3621 /* Backward scanning or we want to use the existing one
3623 * Delete the new one and return early so that the tnode isn't changed
3625 yaffs_DeleteChunk(dev, chunkInNAND, 1,
3633 if (existingChunk == 0)
3636 yaffs_LoadLevel0Tnode(dev, tn, chunkInInode, chunkInNAND);
3641 static int yaffs_ReadChunkDataFromObject(yaffs_Object *in, int chunkInInode,
3644 int chunkInNAND = yaffs_FindChunkInFile(in, chunkInInode, NULL);
3646 if (chunkInNAND >= 0)
3647 return yaffs_ReadChunkWithTagsFromNAND(in->myDev, chunkInNAND,
3650 T(YAFFS_TRACE_NANDACCESS,
3651 (TSTR("Chunk %d not found zero instead" TENDSTR),
3653 /* get sane (zero) data if you read a hole */
3654 memset(buffer, 0, in->myDev->nDataBytesPerChunk);
3660 void yaffs_DeleteChunk(yaffs_Device *dev, int chunkId, int markNAND, int lyn)
3664 yaffs_ExtendedTags tags;
3665 yaffs_BlockInfo *bi;
3671 block = chunkId / dev->nChunksPerBlock;
3672 page = chunkId % dev->nChunksPerBlock;
3675 if (!yaffs_CheckChunkBit(dev, block, page))
3676 T(YAFFS_TRACE_VERIFY,
3677 (TSTR("Deleting invalid chunk %d"TENDSTR),
3680 bi = yaffs_GetBlockInfo(dev, block);
3682 T(YAFFS_TRACE_DELETION,
3683 (TSTR("line %d delete of chunk %d" TENDSTR), lyn, chunkId));
3686 bi->blockState != YAFFS_BLOCK_STATE_COLLECTING && !dev->isYaffs2) {
3688 yaffs_InitialiseTags(&tags);
3690 tags.chunkDeleted = 1;
3692 yaffs_WriteChunkWithTagsToNAND(dev, chunkId, NULL, &tags);
3693 yaffs_HandleUpdateChunk(dev, chunkId, &tags);
3695 dev->nUnmarkedDeletions++;
3698 /* Pull out of the management area.
3699 * If the whole block became dirty, this will kick off an erasure.
3701 if (bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING ||
3702 bi->blockState == YAFFS_BLOCK_STATE_FULL ||
3703 bi->blockState == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
3704 bi->blockState == YAFFS_BLOCK_STATE_COLLECTING) {
3707 yaffs_ClearChunkBit(dev, block, page);
3711 if (bi->pagesInUse == 0 &&
3712 !bi->hasShrinkHeader &&
3713 bi->blockState != YAFFS_BLOCK_STATE_ALLOCATING &&
3714 bi->blockState != YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
3715 yaffs_BlockBecameDirty(dev, block);
3722 static int yaffs_WriteChunkDataToObject(yaffs_Object *in, int chunkInInode,
3723 const __u8 *buffer, int nBytes,
3726 /* Find old chunk Need to do this to get serial number
3727 * Write new one and patch into tree.
3728 * Invalidate old tags.
3732 yaffs_ExtendedTags prevTags;
3735 yaffs_ExtendedTags newTags;
3737 yaffs_Device *dev = in->myDev;
3739 yaffs_CheckGarbageCollection(dev);
3741 /* Get the previous chunk at this location in the file if it exists */
3742 prevChunkId = yaffs_FindChunkInFile(in, chunkInInode, &prevTags);
3744 /* Set up new tags */
3745 yaffs_InitialiseTags(&newTags);
3747 newTags.chunkId = chunkInInode;
3748 newTags.objectId = in->objectId;
3749 newTags.serialNumber =
3750 (prevChunkId > 0) ? prevTags.serialNumber + 1 : 1;
3751 newTags.byteCount = nBytes;
3753 if (nBytes < 1 || nBytes > dev->totalBytesPerChunk) {
3754 T(YAFFS_TRACE_ERROR,
3755 (TSTR("Writing %d bytes to chunk!!!!!!!!!" TENDSTR), nBytes));
3760 * If there isn't already a chunk there then do a dummy
3761 * insert to make sue we have the desired tnode structure.
3763 if(prevChunkId < 1 &&
3764 yaffs_PutChunkIntoFile(in, chunkInInode, 0, 0) != YAFFS_OK)
3768 yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &newTags,
3771 if (newChunkId > 0) {
3772 yaffs_PutChunkIntoFile(in, chunkInInode, newChunkId, 0);
3774 if (prevChunkId > 0)
3775 yaffs_DeleteChunk(dev, prevChunkId, 1, __LINE__);
3777 yaffs_CheckFileSanity(in);
3783 /* UpdateObjectHeader updates the header on NAND for an object.
3784 * If name is not NULL, then that new name is used.
3786 int yaffs_UpdateObjectHeader(yaffs_Object *in, const YCHAR *name, int force,
3787 int isShrink, int shadows)
3790 yaffs_BlockInfo *bi;
3792 yaffs_Device *dev = in->myDev;
3799 yaffs_ExtendedTags newTags;
3800 yaffs_ExtendedTags oldTags;
3801 YCHAR *alias = NULL;
3803 __u8 *buffer = NULL;
3804 YCHAR oldName[YAFFS_MAX_NAME_LENGTH + 1];
3806 yaffs_ObjectHeader *oh = NULL;
3808 yaffs_strcpy(oldName, _Y("silly old name"));
3812 in == dev->rootDir || /* The rootDir should also be saved */
3815 yaffs_CheckGarbageCollection(dev);
3816 yaffs_CheckObjectDetailsLoaded(in);
3818 buffer = yaffs_GetTempBuffer(in->myDev, __LINE__);
3819 oh = (yaffs_ObjectHeader *) buffer;
3821 prevChunkId = in->hdrChunk;
3823 if (prevChunkId > 0) {
3824 result = yaffs_ReadChunkWithTagsFromNAND(dev, prevChunkId,
3827 yaffs_VerifyObjectHeader(in, oh, &oldTags, 0);
3829 memcpy(oldName, oh->name, sizeof(oh->name));
3832 memset(buffer, 0xFF, dev->nDataBytesPerChunk);
3834 oh->type = in->variantType;
3835 oh->yst_mode = in->yst_mode;
3836 oh->shadowsObject = oh->inbandShadowsObject = shadows;
3838 #ifdef CONFIG_YAFFS_WINCE
3839 oh->win_atime[0] = in->win_atime[0];
3840 oh->win_ctime[0] = in->win_ctime[0];
3841 oh->win_mtime[0] = in->win_mtime[0];
3842 oh->win_atime[1] = in->win_atime[1];
3843 oh->win_ctime[1] = in->win_ctime[1];
3844 oh->win_mtime[1] = in->win_mtime[1];
3846 oh->yst_uid = in->yst_uid;
3847 oh->yst_gid = in->yst_gid;
3848 oh->yst_atime = in->yst_atime;
3849 oh->yst_mtime = in->yst_mtime;
3850 oh->yst_ctime = in->yst_ctime;
3851 oh->yst_rdev = in->yst_rdev;
3854 oh->parentObjectId = in->parent->objectId;
3856 oh->parentObjectId = 0;
3858 if (name && *name) {
3859 memset(oh->name, 0, sizeof(oh->name));
3860 yaffs_strncpy(oh->name, name, YAFFS_MAX_NAME_LENGTH);
3861 } else if (prevChunkId > 0)
3862 memcpy(oh->name, oldName, sizeof(oh->name));
3864 memset(oh->name, 0, sizeof(oh->name));
3866 oh->isShrink = isShrink;
3868 switch (in->variantType) {
3869 case YAFFS_OBJECT_TYPE_UNKNOWN:
3870 /* Should not happen */
3872 case YAFFS_OBJECT_TYPE_FILE:
3874 (oh->parentObjectId == YAFFS_OBJECTID_DELETED
3875 || oh->parentObjectId ==
3876 YAFFS_OBJECTID_UNLINKED) ? 0 : in->variant.
3877 fileVariant.fileSize;
3879 case YAFFS_OBJECT_TYPE_HARDLINK:
3880 oh->equivalentObjectId =
3881 in->variant.hardLinkVariant.equivalentObjectId;
3883 case YAFFS_OBJECT_TYPE_SPECIAL:
3886 case YAFFS_OBJECT_TYPE_DIRECTORY:
3889 case YAFFS_OBJECT_TYPE_SYMLINK:
3890 alias = in->variant.symLinkVariant.alias;
3892 alias = _Y("no alias");
3893 yaffs_strncpy(oh->alias,
3895 YAFFS_MAX_ALIAS_LENGTH);
3896 oh->alias[YAFFS_MAX_ALIAS_LENGTH] = 0;
3901 yaffs_InitialiseTags(&newTags);
3903 newTags.chunkId = 0;
3904 newTags.objectId = in->objectId;
3905 newTags.serialNumber = in->serial;
3907 /* Add extra info for file header */
3909 newTags.extraHeaderInfoAvailable = 1;
3910 newTags.extraParentObjectId = oh->parentObjectId;
3911 newTags.extraFileLength = oh->fileSize;
3912 newTags.extraIsShrinkHeader = oh->isShrink;
3913 newTags.extraEquivalentObjectId = oh->equivalentObjectId;
3914 newTags.extraShadows = (oh->shadowsObject > 0) ? 1 : 0;
3915 newTags.extraObjectType = in->variantType;
3917 yaffs_VerifyObjectHeader(in, oh, &newTags, 1);
3919 /* Create new chunk in NAND */
3921 yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &newTags,
3922 (prevChunkId > 0) ? 1 : 0);
3924 if (newChunkId >= 0) {
3926 in->hdrChunk = newChunkId;
3928 if (prevChunkId > 0) {
3929 yaffs_DeleteChunk(dev, prevChunkId, 1,
3933 if (!yaffs_ObjectHasCachedWriteData(in))
3936 /* If this was a shrink, then mark the block that the chunk lives on */
3938 bi = yaffs_GetBlockInfo(in->myDev,
3939 newChunkId / in->myDev->nChunksPerBlock);
3940 bi->hasShrinkHeader = 1;
3945 retVal = newChunkId;
3950 yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
3955 /*------------------------ Short Operations Cache ----------------------------------------
3956 * In many situations where there is no high level buffering (eg WinCE) a lot of
3957 * reads might be short sequential reads, and a lot of writes may be short
3958 * sequential writes. eg. scanning/writing a jpeg file.
3959 * In these cases, a short read/write cache can provide a huge perfomance benefit
3960 * with dumb-as-a-rock code.
3961 * In Linux, the page cache provides read buffering aand the short op cache provides write
3964 * There are a limited number (~10) of cache chunks per device so that we don't
3965 * need a very intelligent search.
3968 static int yaffs_ObjectHasCachedWriteData(yaffs_Object *obj)
3970 yaffs_Device *dev = obj->myDev;
3972 yaffs_ChunkCache *cache;
3973 int nCaches = obj->myDev->nShortOpCaches;
3975 for (i = 0; i < nCaches; i++) {
3976 cache = &dev->srCache[i];
3977 if (cache->object == obj &&
3986 static void yaffs_FlushFilesChunkCache(yaffs_Object *obj)
3988 yaffs_Device *dev = obj->myDev;
3989 int lowest = -99; /* Stop compiler whining. */
3991 yaffs_ChunkCache *cache;
3992 int chunkWritten = 0;
3993 int nCaches = obj->myDev->nShortOpCaches;
3999 /* Find the dirty cache for this object with the lowest chunk id. */
4000 for (i = 0; i < nCaches; i++) {
4001 if (dev->srCache[i].object == obj &&
4002 dev->srCache[i].dirty) {
4004 || dev->srCache[i].chunkId <
4006 cache = &dev->srCache[i];
4007 lowest = cache->chunkId;
4012 if (cache && !cache->locked) {
4013 /* Write it out and free it up */
4016 yaffs_WriteChunkDataToObject(cache->object,
4022 cache->object = NULL;
4025 } while (cache && chunkWritten > 0);
4028 /* Hoosterman, disk full while writing cache out. */
4029 T(YAFFS_TRACE_ERROR,
4030 (TSTR("yaffs tragedy: no space during cache write" TENDSTR)));
4037 /*yaffs_FlushEntireDeviceCache(dev)
4042 void yaffs_FlushEntireDeviceCache(yaffs_Device *dev)
4045 int nCaches = dev->nShortOpCaches;
4048 /* Find a dirty object in the cache and flush it...
4049 * until there are no further dirty objects.
4053 for (i = 0; i < nCaches && !obj; i++) {
4054 if (dev->srCache[i].object &&
4055 dev->srCache[i].dirty)
4056 obj = dev->srCache[i].object;
4060 yaffs_FlushFilesChunkCache(obj);
4067 /* Grab us a cache chunk for use.
4068 * First look for an empty one.
4069 * Then look for the least recently used non-dirty one.
4070 * Then look for the least recently used dirty one...., flush and look again.
4072 static yaffs_ChunkCache *yaffs_GrabChunkCacheWorker(yaffs_Device *dev)
4076 if (dev->nShortOpCaches > 0) {
4077 for (i = 0; i < dev->nShortOpCaches; i++) {
4078 if (!dev->srCache[i].object)
4079 return &dev->srCache[i];
4086 static yaffs_ChunkCache *yaffs_GrabChunkCache(yaffs_Device *dev)
4088 yaffs_ChunkCache *cache;
4089 yaffs_Object *theObj;
4094 if (dev->nShortOpCaches > 0) {
4095 /* Try find a non-dirty one... */
4097 cache = yaffs_GrabChunkCacheWorker(dev);
4100 /* They were all dirty, find the last recently used object and flush
4101 * its cache, then find again.
4102 * NB what's here is not very accurate, we actually flush the object
4103 * the last recently used page.
4106 /* With locking we can't assume we can use entry zero */
4113 for (i = 0; i < dev->nShortOpCaches; i++) {
4114 if (dev->srCache[i].object &&
4115 !dev->srCache[i].locked &&
4116 (dev->srCache[i].lastUse < usage || !cache)) {
4117 usage = dev->srCache[i].lastUse;
4118 theObj = dev->srCache[i].object;
4119 cache = &dev->srCache[i];
4124 if (!cache || cache->dirty) {
4125 /* Flush and try again */
4126 yaffs_FlushFilesChunkCache(theObj);
4127 cache = yaffs_GrabChunkCacheWorker(dev);
4137 /* Find a cached chunk */
4138 static yaffs_ChunkCache *yaffs_FindChunkCache(const yaffs_Object *obj,
4141 yaffs_Device *dev = obj->myDev;
4143 if (dev->nShortOpCaches > 0) {
4144 for (i = 0; i < dev->nShortOpCaches; i++) {
4145 if (dev->srCache[i].object == obj &&
4146 dev->srCache[i].chunkId == chunkId) {
4149 return &dev->srCache[i];
4156 /* Mark the chunk for the least recently used algorithym */
4157 static void yaffs_UseChunkCache(yaffs_Device *dev, yaffs_ChunkCache *cache,
4161 if (dev->nShortOpCaches > 0) {
4162 if (dev->srLastUse < 0 || dev->srLastUse > 100000000) {
4163 /* Reset the cache usages */
4165 for (i = 1; i < dev->nShortOpCaches; i++)
4166 dev->srCache[i].lastUse = 0;
4173 cache->lastUse = dev->srLastUse;
4180 /* Invalidate a single cache page.
4181 * Do this when a whole page gets written,
4182 * ie the short cache for this page is no longer valid.
4184 static void yaffs_InvalidateChunkCache(yaffs_Object *object, int chunkId)
4186 if (object->myDev->nShortOpCaches > 0) {
4187 yaffs_ChunkCache *cache = yaffs_FindChunkCache(object, chunkId);
4190 cache->object = NULL;
4194 /* Invalidate all the cache pages associated with this object
4195 * Do this whenever ther file is deleted or resized.
4197 static void yaffs_InvalidateWholeChunkCache(yaffs_Object *in)
4200 yaffs_Device *dev = in->myDev;
4202 if (dev->nShortOpCaches > 0) {
4203 /* Invalidate it. */
4204 for (i = 0; i < dev->nShortOpCaches; i++) {
4205 if (dev->srCache[i].object == in)
4206 dev->srCache[i].object = NULL;
4211 /*--------------------- Checkpointing --------------------*/
4214 static int yaffs_WriteCheckpointValidityMarker(yaffs_Device *dev, int head)
4216 yaffs_CheckpointValidity cp;
4218 memset(&cp, 0, sizeof(cp));
4220 cp.structType = sizeof(cp);
4221 cp.magic = YAFFS_MAGIC;
4222 cp.version = YAFFS_CHECKPOINT_VERSION;
4223 cp.head = (head) ? 1 : 0;
4225 return (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp)) ?
4229 static int yaffs_ReadCheckpointValidityMarker(yaffs_Device *dev, int head)
4231 yaffs_CheckpointValidity cp;
4234 ok = (yaffs_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp));
4237 ok = (cp.structType == sizeof(cp)) &&
4238 (cp.magic == YAFFS_MAGIC) &&
4239 (cp.version == YAFFS_CHECKPOINT_VERSION) &&
4240 (cp.head == ((head) ? 1 : 0));
4244 static void yaffs_DeviceToCheckpointDevice(yaffs_CheckpointDevice *cp,
4247 cp->nErasedBlocks = dev->nErasedBlocks;
4248 cp->allocationBlock = dev->allocationBlock;
4249 cp->allocationPage = dev->allocationPage;
4250 cp->nFreeChunks = dev->nFreeChunks;
4252 cp->nDeletedFiles = dev->nDeletedFiles;
4253 cp->nUnlinkedFiles = dev->nUnlinkedFiles;
4254 cp->nBackgroundDeletions = dev->nBackgroundDeletions;
4255 cp->sequenceNumber = dev->sequenceNumber;
4256 cp->oldestDirtySequence = dev->oldestDirtySequence;
4260 static void yaffs_CheckpointDeviceToDevice(yaffs_Device *dev,
4261 yaffs_CheckpointDevice *cp)
4263 dev->nErasedBlocks = cp->nErasedBlocks;
4264 dev->allocationBlock = cp->allocationBlock;
4265 dev->allocationPage = cp->allocationPage;
4266 dev->nFreeChunks = cp->nFreeChunks;
4268 dev->nDeletedFiles = cp->nDeletedFiles;
4269 dev->nUnlinkedFiles = cp->nUnlinkedFiles;
4270 dev->nBackgroundDeletions = cp->nBackgroundDeletions;
4271 dev->sequenceNumber = cp->sequenceNumber;
4272 dev->oldestDirtySequence = cp->oldestDirtySequence;
4276 static int yaffs_WriteCheckpointDevice(yaffs_Device *dev)
4278 yaffs_CheckpointDevice cp;
4280 __u32 nBlocks = (dev->internalEndBlock - dev->internalStartBlock + 1);
4284 /* Write device runtime values*/
4285 yaffs_DeviceToCheckpointDevice(&cp, dev);
4286 cp.structType = sizeof(cp);
4288 ok = (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp));
4290 /* Write block info */
4292 nBytes = nBlocks * sizeof(yaffs_BlockInfo);
4293 ok = (yaffs_CheckpointWrite(dev, dev->blockInfo, nBytes) == nBytes);
4296 /* Write chunk bits */
4298 nBytes = nBlocks * dev->chunkBitmapStride;
4299 ok = (yaffs_CheckpointWrite(dev, dev->chunkBits, nBytes) == nBytes);
4305 static int yaffs_ReadCheckpointDevice(yaffs_Device *dev)
4307 yaffs_CheckpointDevice cp;
4309 __u32 nBlocks = (dev->internalEndBlock - dev->internalStartBlock + 1);
4313 ok = (yaffs_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp));
4317 if (cp.structType != sizeof(cp))
4321 yaffs_CheckpointDeviceToDevice(dev, &cp);
4323 nBytes = nBlocks * sizeof(yaffs_BlockInfo);
4325 ok = (yaffs_CheckpointRead(dev, dev->blockInfo, nBytes) == nBytes);
4329 nBytes = nBlocks * dev->chunkBitmapStride;
4331 ok = (yaffs_CheckpointRead(dev, dev->chunkBits, nBytes) == nBytes);
4336 static void yaffs_ObjectToCheckpointObject(yaffs_CheckpointObject *cp,
4340 cp->objectId = obj->objectId;
4341 cp->parentId = (obj->parent) ? obj->parent->objectId : 0;
4342 cp->hdrChunk = obj->hdrChunk;
4343 cp->variantType = obj->variantType;
4344 cp->deleted = obj->deleted;
4345 cp->softDeleted = obj->softDeleted;
4346 cp->unlinked = obj->unlinked;
4347 cp->fake = obj->fake;
4348 cp->renameAllowed = obj->renameAllowed;
4349 cp->unlinkAllowed = obj->unlinkAllowed;
4350 cp->serial = obj->serial;
4351 cp->nDataChunks = obj->nDataChunks;
4353 if (obj->variantType == YAFFS_OBJECT_TYPE_FILE)
4354 cp->fileSizeOrEquivalentObjectId = obj->variant.fileVariant.fileSize;
4355 else if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK)
4356 cp->fileSizeOrEquivalentObjectId = obj->variant.hardLinkVariant.equivalentObjectId;
4359 static int yaffs_CheckpointObjectToObject(yaffs_Object *obj, yaffs_CheckpointObject *cp)
4362 yaffs_Object *parent;
4364 if (obj->variantType != cp->variantType) {
4365 T(YAFFS_TRACE_ERROR, (TSTR("Checkpoint read object %d type %d "
4366 TCONT("chunk %d does not match existing object type %d")
4367 TENDSTR), cp->objectId, cp->variantType, cp->hdrChunk,
4372 obj->objectId = cp->objectId;
4375 parent = yaffs_FindOrCreateObjectByNumber(
4378 YAFFS_OBJECT_TYPE_DIRECTORY);
4383 if (parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
4384 T(YAFFS_TRACE_ALWAYS, (TSTR("Checkpoint read object %d parent %d type %d"
4385 TCONT(" chunk %d Parent type, %d, not directory")
4387 cp->objectId, cp->parentId, cp->variantType,
4388 cp->hdrChunk, parent->variantType));
4391 yaffs_AddObjectToDirectory(parent, obj);
4394 obj->hdrChunk = cp->hdrChunk;
4395 obj->variantType = cp->variantType;
4396 obj->deleted = cp->deleted;
4397 obj->softDeleted = cp->softDeleted;
4398 obj->unlinked = cp->unlinked;
4399 obj->fake = cp->fake;
4400 obj->renameAllowed = cp->renameAllowed;
4401 obj->unlinkAllowed = cp->unlinkAllowed;
4402 obj->serial = cp->serial;
4403 obj->nDataChunks = cp->nDataChunks;
4405 if (obj->variantType == YAFFS_OBJECT_TYPE_FILE)
4406 obj->variant.fileVariant.fileSize = cp->fileSizeOrEquivalentObjectId;
4407 else if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK)
4408 obj->variant.hardLinkVariant.equivalentObjectId = cp->fileSizeOrEquivalentObjectId;
4410 if (obj->hdrChunk > 0)
4411 obj->lazyLoaded = 1;
4417 static int yaffs_CheckpointTnodeWorker(yaffs_Object *in, yaffs_Tnode *tn,
4418 __u32 level, int chunkOffset)
4421 yaffs_Device *dev = in->myDev;
4423 int tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
4425 if (tnodeSize < sizeof(yaffs_Tnode))
4426 tnodeSize = sizeof(yaffs_Tnode);
4432 for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++) {
4433 if (tn->internal[i]) {
4434 ok = yaffs_CheckpointTnodeWorker(in,
4437 (chunkOffset<<YAFFS_TNODES_INTERNAL_BITS) + i);
4440 } else if (level == 0) {
4441 __u32 baseOffset = chunkOffset << YAFFS_TNODES_LEVEL0_BITS;
4442 ok = (yaffs_CheckpointWrite(dev, &baseOffset, sizeof(baseOffset)) == sizeof(baseOffset));
4444 ok = (yaffs_CheckpointWrite(dev, tn, tnodeSize) == tnodeSize);
4452 static int yaffs_WriteCheckpointTnodes(yaffs_Object *obj)
4454 __u32 endMarker = ~0;
4457 if (obj->variantType == YAFFS_OBJECT_TYPE_FILE) {
4458 ok = yaffs_CheckpointTnodeWorker(obj,
4459 obj->variant.fileVariant.top,
4460 obj->variant.fileVariant.topLevel,
4463 ok = (yaffs_CheckpointWrite(obj->myDev, &endMarker, sizeof(endMarker)) ==
4470 static int yaffs_ReadCheckpointTnodes(yaffs_Object *obj)
4474 yaffs_Device *dev = obj->myDev;
4475 yaffs_FileStructure *fileStructPtr = &obj->variant.fileVariant;
4478 int tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
4480 if (tnodeSize < sizeof(yaffs_Tnode))
4481 tnodeSize = sizeof(yaffs_Tnode);
4483 ok = (yaffs_CheckpointRead(dev, &baseChunk, sizeof(baseChunk)) == sizeof(baseChunk));
4485 while (ok && (~baseChunk)) {
4487 /* Read level 0 tnode */
4490 tn = yaffs_GetTnodeRaw(dev);
4492 ok = (yaffs_CheckpointRead(dev, tn, tnodeSize) == tnodeSize);
4497 ok = yaffs_AddOrFindLevel0Tnode(dev,
4503 ok = (yaffs_CheckpointRead(dev, &baseChunk, sizeof(baseChunk)) == sizeof(baseChunk));
4507 T(YAFFS_TRACE_CHECKPOINT, (
4508 TSTR("Checkpoint read tnodes %d records, last %d. ok %d" TENDSTR),
4509 nread, baseChunk, ok));
4515 static int yaffs_WriteCheckpointObjects(yaffs_Device *dev)
4518 yaffs_CheckpointObject cp;
4521 struct ylist_head *lh;
4524 /* Iterate through the objects in each hash entry,
4525 * dumping them to the checkpointing stream.
4528 for (i = 0; ok && i < YAFFS_NOBJECT_BUCKETS; i++) {
4529 ylist_for_each(lh, &dev->objectBucket[i].list) {
4531 obj = ylist_entry(lh, yaffs_Object, hashLink);
4532 if (!obj->deferedFree) {
4533 yaffs_ObjectToCheckpointObject(&cp, obj);
4534 cp.structType = sizeof(cp);
4536 T(YAFFS_TRACE_CHECKPOINT, (
4537 TSTR("Checkpoint write object %d parent %d type %d chunk %d obj addr %p" TENDSTR),
4538 cp.objectId, cp.parentId, cp.variantType, cp.hdrChunk, obj));
4540 ok = (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp));
4542 if (ok && obj->variantType == YAFFS_OBJECT_TYPE_FILE)
4543 ok = yaffs_WriteCheckpointTnodes(obj);
4549 /* Dump end of list */
4550 memset(&cp, 0xFF, sizeof(yaffs_CheckpointObject));
4551 cp.structType = sizeof(cp);
4554 ok = (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp));
4559 static int yaffs_ReadCheckpointObjects(yaffs_Device *dev)
4562 yaffs_CheckpointObject cp;
4565 yaffs_Object *hardList = NULL;
4567 while (ok && !done) {
4568 ok = (yaffs_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp));
4569 if (cp.structType != sizeof(cp)) {
4570 T(YAFFS_TRACE_CHECKPOINT, (TSTR("struct size %d instead of %d ok %d"TENDSTR),
4571 cp.structType, (int)sizeof(cp), ok));
4575 T(YAFFS_TRACE_CHECKPOINT, (TSTR("Checkpoint read object %d parent %d type %d chunk %d " TENDSTR),
4576 cp.objectId, cp.parentId, cp.variantType, cp.hdrChunk));
4578 if (ok && cp.objectId == ~0)
4581 obj = yaffs_FindOrCreateObjectByNumber(dev, cp.objectId, cp.variantType);
4583 ok = yaffs_CheckpointObjectToObject(obj, &cp);
4586 if (obj->variantType == YAFFS_OBJECT_TYPE_FILE) {
4587 ok = yaffs_ReadCheckpointTnodes(obj);
4588 } else if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) {
4589 obj->hardLinks.next =
4590 (struct ylist_head *) hardList;
4599 yaffs_HardlinkFixup(dev, hardList);
4604 static int yaffs_WriteCheckpointSum(yaffs_Device *dev)
4606 __u32 checkpointSum;
4609 yaffs_GetCheckpointSum(dev, &checkpointSum);
4611 ok = (yaffs_CheckpointWrite(dev, &checkpointSum, sizeof(checkpointSum)) == sizeof(checkpointSum));
4619 static int yaffs_ReadCheckpointSum(yaffs_Device *dev)
4621 __u32 checkpointSum0;
4622 __u32 checkpointSum1;
4625 yaffs_GetCheckpointSum(dev, &checkpointSum0);
4627 ok = (yaffs_CheckpointRead(dev, &checkpointSum1, sizeof(checkpointSum1)) == sizeof(checkpointSum1));
4632 if (checkpointSum0 != checkpointSum1)
4639 static int yaffs_WriteCheckpointData(yaffs_Device *dev)
4643 if (dev->skipCheckpointWrite || !dev->isYaffs2) {
4644 T(YAFFS_TRACE_CHECKPOINT, (TSTR("skipping checkpoint write" TENDSTR)));
4649 ok = yaffs_CheckpointOpen(dev, 1);
4652 T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint validity" TENDSTR)));
4653 ok = yaffs_WriteCheckpointValidityMarker(dev, 1);
4656 T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint device" TENDSTR)));
4657 ok = yaffs_WriteCheckpointDevice(dev);
4660 T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint objects" TENDSTR)));
4661 ok = yaffs_WriteCheckpointObjects(dev);
4664 T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint validity" TENDSTR)));
4665 ok = yaffs_WriteCheckpointValidityMarker(dev, 0);
4669 ok = yaffs_WriteCheckpointSum(dev);
4671 if (!yaffs_CheckpointClose(dev))
4675 dev->isCheckpointed = 1;
4677 dev->isCheckpointed = 0;
4679 return dev->isCheckpointed;
4682 static int yaffs_ReadCheckpointData(yaffs_Device *dev)
4686 if (dev->skipCheckpointRead || !dev->isYaffs2) {
4687 T(YAFFS_TRACE_CHECKPOINT, (TSTR("skipping checkpoint read" TENDSTR)));
4692 ok = yaffs_CheckpointOpen(dev, 0); /* open for read */
4695 T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint validity" TENDSTR)));
4696 ok = yaffs_ReadCheckpointValidityMarker(dev, 1);
4699 T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint device" TENDSTR)));
4700 ok = yaffs_ReadCheckpointDevice(dev);
4703 T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint objects" TENDSTR)));
4704 ok = yaffs_ReadCheckpointObjects(dev);
4707 T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint validity" TENDSTR)));
4708 ok = yaffs_ReadCheckpointValidityMarker(dev, 0);
4712 ok = yaffs_ReadCheckpointSum(dev);
4713 T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint checksum %d" TENDSTR), ok));
4716 if (!yaffs_CheckpointClose(dev))
4720 dev->isCheckpointed = 1;
4722 dev->isCheckpointed = 0;
4728 static void yaffs_InvalidateCheckpoint(yaffs_Device *dev)
4730 if (dev->isCheckpointed ||
4731 dev->blocksInCheckpoint > 0) {
4732 dev->isCheckpointed = 0;
4733 yaffs_CheckpointInvalidateStream(dev);
4734 if (dev->superBlock && dev->markSuperBlockDirty)
4735 dev->markSuperBlockDirty(dev->superBlock);
4740 int yaffs_CheckpointSave(yaffs_Device *dev)
4743 T(YAFFS_TRACE_CHECKPOINT, (TSTR("save entry: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
4745 yaffs_VerifyObjects(dev);
4746 yaffs_VerifyBlocks(dev);
4747 yaffs_VerifyFreeChunks(dev);
4749 if (!dev->isCheckpointed) {
4750 yaffs_InvalidateCheckpoint(dev);
4751 yaffs_WriteCheckpointData(dev);
4754 T(YAFFS_TRACE_ALWAYS, (TSTR("save exit: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
4756 return dev->isCheckpointed;
4759 int yaffs_CheckpointRestore(yaffs_Device *dev)
4762 T(YAFFS_TRACE_CHECKPOINT, (TSTR("restore entry: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
4764 retval = yaffs_ReadCheckpointData(dev);
4766 if (dev->isCheckpointed) {
4767 yaffs_VerifyObjects(dev);
4768 yaffs_VerifyBlocks(dev);
4769 yaffs_VerifyFreeChunks(dev);
4772 T(YAFFS_TRACE_CHECKPOINT, (TSTR("restore exit: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
4777 /*--------------------- File read/write ------------------------
4778 * Read and write have very similar structures.
4779 * In general the read/write has three parts to it
4780 * An incomplete chunk to start with (if the read/write is not chunk-aligned)
4781 * Some complete chunks
4782 * An incomplete chunk to end off with
4784 * Curve-balls: the first chunk might also be the last chunk.
4787 int yaffs_ReadDataFromFile(yaffs_Object *in, __u8 *buffer, loff_t offset,
4796 yaffs_ChunkCache *cache;
4803 /* chunk = offset / dev->nDataBytesPerChunk + 1; */
4804 /* start = offset % dev->nDataBytesPerChunk; */
4805 yaffs_AddrToChunk(dev, offset, &chunk, &start);
4808 /* OK now check for the curveball where the start and end are in
4811 if ((start + n) < dev->nDataBytesPerChunk)
4814 nToCopy = dev->nDataBytesPerChunk - start;
4816 cache = yaffs_FindChunkCache(in, chunk);
4818 /* If the chunk is already in the cache or it is less than a whole chunk
4819 * or we're using inband tags then use the cache (if there is caching)
4820 * else bypass the cache.
4822 if (cache || nToCopy != dev->nDataBytesPerChunk || dev->inbandTags) {
4823 if (dev->nShortOpCaches > 0) {
4825 /* If we can't find the data in the cache, then load it up. */
4828 cache = yaffs_GrabChunkCache(in->myDev);
4830 cache->chunkId = chunk;
4833 yaffs_ReadChunkDataFromObject(in, chunk,
4839 yaffs_UseChunkCache(dev, cache, 0);
4844 memcpy(buffer, &cache->data[start], nToCopy);
4848 /* Read into the local buffer then copy..*/
4851 yaffs_GetTempBuffer(dev, __LINE__);
4852 yaffs_ReadChunkDataFromObject(in, chunk,
4855 memcpy(buffer, &localBuffer[start], nToCopy);
4858 yaffs_ReleaseTempBuffer(dev, localBuffer,
4864 /* A full chunk. Read directly into the supplied buffer. */
4865 yaffs_ReadChunkDataFromObject(in, chunk, buffer);
4879 int yaffs_WriteDataToFile(yaffs_Object *in, const __u8 *buffer, loff_t offset,
4880 int nBytes, int writeThrough)
4889 int startOfWrite = offset;
4890 int chunkWritten = 0;
4898 while (n > 0 && chunkWritten >= 0) {
4899 /* chunk = offset / dev->nDataBytesPerChunk + 1; */
4900 /* start = offset % dev->nDataBytesPerChunk; */
4901 yaffs_AddrToChunk(dev, offset, &chunk, &start);
4903 if (chunk * dev->nDataBytesPerChunk + start != offset ||
4904 start >= dev->nDataBytesPerChunk) {
4905 T(YAFFS_TRACE_ERROR, (
4906 TSTR("AddrToChunk of offset %d gives chunk %d start %d"
4908 (int)offset, chunk, start));
4912 /* OK now check for the curveball where the start and end are in
4916 if ((start + n) < dev->nDataBytesPerChunk) {
4919 /* Now folks, to calculate how many bytes to write back....
4920 * If we're overwriting and not writing to then end of file then
4921 * we need to write back as much as was there before.
4924 chunkStart = ((chunk - 1) * dev->nDataBytesPerChunk);
4926 if (chunkStart > in->variant.fileVariant.fileSize)
4927 nBytesRead = 0; /* Past end of file */
4929 nBytesRead = in->variant.fileVariant.fileSize - chunkStart;
4931 if (nBytesRead > dev->nDataBytesPerChunk)
4932 nBytesRead = dev->nDataBytesPerChunk;
4936 (start + n)) ? nBytesRead : (start + n);
4938 if (nToWriteBack < 0 || nToWriteBack > dev->nDataBytesPerChunk)
4942 nToCopy = dev->nDataBytesPerChunk - start;
4943 nToWriteBack = dev->nDataBytesPerChunk;
4946 if (nToCopy != dev->nDataBytesPerChunk || dev->inbandTags) {
4947 /* An incomplete start or end chunk (or maybe both start and end chunk),
4948 * or we're using inband tags, so we want to use the cache buffers.
4950 if (dev->nShortOpCaches > 0) {
4951 yaffs_ChunkCache *cache;
4952 /* If we can't find the data in the cache, then load the cache */
4953 cache = yaffs_FindChunkCache(in, chunk);
4956 && yaffs_CheckSpaceForAllocation(in->
4958 cache = yaffs_GrabChunkCache(in->myDev);
4960 cache->chunkId = chunk;
4963 yaffs_ReadChunkDataFromObject(in, chunk,
4968 !yaffs_CheckSpaceForAllocation(in->myDev)) {
4969 /* Drop the cache if it was a read cache item and
4970 * no space check has been made for it.
4976 yaffs_UseChunkCache(dev, cache, 1);
4980 memcpy(&cache->data[start], buffer,
4985 cache->nBytes = nToWriteBack;
4989 yaffs_WriteChunkDataToObject
4992 cache->data, cache->nBytes,
4998 chunkWritten = -1; /* fail the write */
5001 /* An incomplete start or end chunk (or maybe both start and end chunk)
5002 * Read into the local buffer then copy, then copy over and write back.
5006 yaffs_GetTempBuffer(dev, __LINE__);
5008 yaffs_ReadChunkDataFromObject(in, chunk,
5013 memcpy(&localBuffer[start], buffer, nToCopy);
5016 yaffs_WriteChunkDataToObject(in, chunk,
5021 yaffs_ReleaseTempBuffer(dev, localBuffer,
5027 /* A full chunk. Write directly from the supplied buffer. */
5032 yaffs_WriteChunkDataToObject(in, chunk, buffer,
5033 dev->nDataBytesPerChunk,
5036 /* Since we've overwritten the cached data, we better invalidate it. */
5037 yaffs_InvalidateChunkCache(in, chunk);
5040 if (chunkWritten >= 0) {
5049 /* Update file object */
5051 if ((startOfWrite + nDone) > in->variant.fileVariant.fileSize)
5052 in->variant.fileVariant.fileSize = (startOfWrite + nDone);
5060 /* ---------------------- File resizing stuff ------------------ */
5062 static void yaffs_PruneResizedChunks(yaffs_Object *in, int newSize)
5065 yaffs_Device *dev = in->myDev;
5066 int oldFileSize = in->variant.fileVariant.fileSize;
5068 int lastDel = 1 + (oldFileSize - 1) / dev->nDataBytesPerChunk;
5070 int startDel = 1 + (newSize + dev->nDataBytesPerChunk - 1) /
5071 dev->nDataBytesPerChunk;
5075 /* Delete backwards so that we don't end up with holes if
5076 * power is lost part-way through the operation.
5078 for (i = lastDel; i >= startDel; i--) {
5079 /* NB this could be optimised somewhat,
5080 * eg. could retrieve the tags and write them without
5081 * using yaffs_DeleteChunk
5084 chunkId = yaffs_FindAndDeleteChunkInFile(in, i, NULL);
5087 (dev->internalStartBlock * dev->nChunksPerBlock)
5089 ((dev->internalEndBlock +
5090 1) * dev->nChunksPerBlock)) {
5091 T(YAFFS_TRACE_ALWAYS,
5092 (TSTR("Found daft chunkId %d for %d" TENDSTR),
5096 yaffs_DeleteChunk(dev, chunkId, 1, __LINE__);
5103 int yaffs_ResizeFile(yaffs_Object *in, loff_t newSize)
5106 int oldFileSize = in->variant.fileVariant.fileSize;
5107 __u32 newSizeOfPartialChunk;
5110 yaffs_Device *dev = in->myDev;
5112 yaffs_AddrToChunk(dev, newSize, &newFullChunks, &newSizeOfPartialChunk);
5114 yaffs_FlushFilesChunkCache(in);
5115 yaffs_InvalidateWholeChunkCache(in);
5117 yaffs_CheckGarbageCollection(dev);
5119 if (in->variantType != YAFFS_OBJECT_TYPE_FILE)
5122 if (newSize == oldFileSize)
5125 if (newSize < oldFileSize) {
5127 yaffs_PruneResizedChunks(in, newSize);
5129 if (newSizeOfPartialChunk != 0) {
5130 int lastChunk = 1 + newFullChunks;
5132 __u8 *localBuffer = yaffs_GetTempBuffer(dev, __LINE__);
5134 /* Got to read and rewrite the last chunk with its new size and zero pad */
5135 yaffs_ReadChunkDataFromObject(in, lastChunk,
5138 memset(localBuffer + newSizeOfPartialChunk, 0,
5139 dev->nDataBytesPerChunk - newSizeOfPartialChunk);
5141 yaffs_WriteChunkDataToObject(in, lastChunk, localBuffer,
5142 newSizeOfPartialChunk, 1);
5144 yaffs_ReleaseTempBuffer(dev, localBuffer, __LINE__);
5147 in->variant.fileVariant.fileSize = newSize;
5149 yaffs_PruneFileStructure(dev, &in->variant.fileVariant);
5151 /* newsSize > oldFileSize */
5152 in->variant.fileVariant.fileSize = newSize;
5156 /* Write a new object header to reflect the resize.
5157 * show we've shrunk the file, if need be
5158 * Do this only if the file is not in the deleted directories
5159 * and is not shadowed.
5163 in->parent->objectId != YAFFS_OBJECTID_UNLINKED &&
5164 in->parent->objectId != YAFFS_OBJECTID_DELETED)
5165 yaffs_UpdateObjectHeader(in, NULL, 0,
5166 (newSize < oldFileSize) ? 1 : 0, 0);
5171 loff_t yaffs_GetFileSize(yaffs_Object *obj)
5173 YCHAR *alias = NULL;
5174 obj = yaffs_GetEquivalentObject(obj);
5176 switch (obj->variantType) {
5177 case YAFFS_OBJECT_TYPE_FILE:
5178 return obj->variant.fileVariant.fileSize;
5179 case YAFFS_OBJECT_TYPE_SYMLINK:
5180 alias = obj->variant.symLinkVariant.alias;
5183 return yaffs_strnlen(alias,YAFFS_MAX_ALIAS_LENGTH);
5191 int yaffs_FlushFile(yaffs_Object *in, int updateTime, int dataSync)
5195 yaffs_FlushFilesChunkCache(in);
5196 if(dataSync) /* Only sync data */
5200 #ifdef CONFIG_YAFFS_WINCE
5201 yfsd_WinFileTimeNow(in->win_mtime);
5204 in->yst_mtime = Y_CURRENT_TIME;
5209 retVal = (yaffs_UpdateObjectHeader(in, NULL, 0, 0, 0) >=
5210 0) ? YAFFS_OK : YAFFS_FAIL;
5220 static int yaffs_DoGenericObjectDeletion(yaffs_Object *in)
5223 /* First off, invalidate the file's data in the cache, without flushing. */
5224 yaffs_InvalidateWholeChunkCache(in);
5226 if (in->myDev->isYaffs2 && (in->parent != in->myDev->deletedDir)) {
5227 /* Move to the unlinked directory so we have a record that it was deleted. */
5228 yaffs_ChangeObjectName(in, in->myDev->deletedDir, _Y("deleted"), 0, 0);
5232 yaffs_RemoveObjectFromDirectory(in);
5233 yaffs_DeleteChunk(in->myDev, in->hdrChunk, 1, __LINE__);
5236 yaffs_FreeObject(in);
5241 /* yaffs_DeleteFile deletes the whole file data
5242 * and the inode associated with the file.
5243 * It does not delete the links associated with the file.
5245 static int yaffs_UnlinkFileIfNeeded(yaffs_Object *in)
5249 int immediateDeletion = 0;
5253 immediateDeletion = 1;
5256 immediateDeletion = 1;
5259 if (immediateDeletion) {
5261 yaffs_ChangeObjectName(in, in->myDev->deletedDir,
5262 _Y("deleted"), 0, 0);
5263 T(YAFFS_TRACE_TRACING,
5264 (TSTR("yaffs: immediate deletion of file %d" TENDSTR),
5267 in->myDev->nDeletedFiles++;
5268 if (1 || in->myDev->isYaffs2)
5269 yaffs_ResizeFile(in, 0);
5270 yaffs_SoftDeleteFile(in);
5273 yaffs_ChangeObjectName(in, in->myDev->unlinkedDir,
5274 _Y("unlinked"), 0, 0);
5281 int yaffs_DeleteFile(yaffs_Object *in)
5283 int retVal = YAFFS_OK;
5284 int deleted = in->deleted;
5286 yaffs_ResizeFile(in, 0);
5288 if (in->nDataChunks > 0) {
5289 /* Use soft deletion if there is data in the file.
5290 * That won't be the case if it has been resized to zero.
5293 retVal = yaffs_UnlinkFileIfNeeded(in);
5295 if (retVal == YAFFS_OK && in->unlinked && !in->deleted) {
5298 in->myDev->nDeletedFiles++;
5299 yaffs_SoftDeleteFile(in);
5301 return deleted ? YAFFS_OK : YAFFS_FAIL;
5303 /* The file has no data chunks so we toss it immediately */
5304 yaffs_FreeTnode(in->myDev, in->variant.fileVariant.top);
5305 in->variant.fileVariant.top = NULL;
5306 yaffs_DoGenericObjectDeletion(in);
5312 static int yaffs_IsNonEmptyDirectory(yaffs_Object *obj)
5314 return (obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) &&
5315 !(ylist_empty(&obj->variant.directoryVariant.children));
5318 static int yaffs_DeleteDirectory(yaffs_Object *obj)
5320 /* First check that the directory is empty. */
5321 if (yaffs_IsNonEmptyDirectory(obj))
5324 return yaffs_DoGenericObjectDeletion(obj);
5327 static int yaffs_DeleteSymLink(yaffs_Object *in)
5329 if(in->variant.symLinkVariant.alias)
5330 YFREE(in->variant.symLinkVariant.alias);
5331 in->variant.symLinkVariant.alias=NULL;
5333 return yaffs_DoGenericObjectDeletion(in);
5336 static int yaffs_DeleteHardLink(yaffs_Object *in)
5338 /* remove this hardlink from the list assocaited with the equivalent
5341 ylist_del_init(&in->hardLinks);
5342 return yaffs_DoGenericObjectDeletion(in);
5345 int yaffs_DeleteObject(yaffs_Object *obj)
5348 switch (obj->variantType) {
5349 case YAFFS_OBJECT_TYPE_FILE:
5350 retVal = yaffs_DeleteFile(obj);
5352 case YAFFS_OBJECT_TYPE_DIRECTORY:
5353 return yaffs_DeleteDirectory(obj);
5355 case YAFFS_OBJECT_TYPE_SYMLINK:
5356 retVal = yaffs_DeleteSymLink(obj);
5358 case YAFFS_OBJECT_TYPE_HARDLINK:
5359 retVal = yaffs_DeleteHardLink(obj);
5361 case YAFFS_OBJECT_TYPE_SPECIAL:
5362 retVal = yaffs_DoGenericObjectDeletion(obj);
5364 case YAFFS_OBJECT_TYPE_UNKNOWN:
5366 break; /* should not happen. */
5372 static int yaffs_UnlinkWorker(yaffs_Object *obj)
5375 int immediateDeletion = 0;
5379 immediateDeletion = 1;
5381 if (obj->inUse <= 0)
5382 immediateDeletion = 1;
5386 yaffs_UpdateParent(obj->parent);
5388 if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) {
5389 return yaffs_DeleteHardLink(obj);
5390 } else if (!ylist_empty(&obj->hardLinks)) {
5391 /* Curve ball: We're unlinking an object that has a hardlink.
5393 * This problem arises because we are not strictly following
5394 * The Linux link/inode model.
5396 * We can't really delete the object.
5397 * Instead, we do the following:
5398 * - Select a hardlink.
5399 * - Unhook it from the hard links
5400 * - Unhook it from its parent directory (so that the rename can work)
5401 * - Rename the object to the hardlink's name.
5402 * - Delete the hardlink
5407 YCHAR name[YAFFS_MAX_NAME_LENGTH + 1];
5409 hl = ylist_entry(obj->hardLinks.next, yaffs_Object, hardLinks);
5411 ylist_del_init(&hl->hardLinks);
5412 ylist_del_init(&hl->siblings);
5414 yaffs_GetObjectName(hl, name, YAFFS_MAX_NAME_LENGTH + 1);
5416 retVal = yaffs_ChangeObjectName(obj, hl->parent, name, 0, 0);
5418 if (retVal == YAFFS_OK)
5419 retVal = yaffs_DoGenericObjectDeletion(hl);
5423 } else if (immediateDeletion) {
5424 switch (obj->variantType) {
5425 case YAFFS_OBJECT_TYPE_FILE:
5426 return yaffs_DeleteFile(obj);
5428 case YAFFS_OBJECT_TYPE_DIRECTORY:
5429 return yaffs_DeleteDirectory(obj);
5431 case YAFFS_OBJECT_TYPE_SYMLINK:
5432 return yaffs_DeleteSymLink(obj);
5434 case YAFFS_OBJECT_TYPE_SPECIAL:
5435 return yaffs_DoGenericObjectDeletion(obj);
5437 case YAFFS_OBJECT_TYPE_HARDLINK:
5438 case YAFFS_OBJECT_TYPE_UNKNOWN:
5442 } else if(yaffs_IsNonEmptyDirectory(obj))
5445 return yaffs_ChangeObjectName(obj, obj->myDev->unlinkedDir,
5446 _Y("unlinked"), 0, 0);
5450 static int yaffs_UnlinkObject(yaffs_Object *obj)
5453 if (obj && obj->unlinkAllowed)
5454 return yaffs_UnlinkWorker(obj);
5459 int yaffs_Unlink(yaffs_Object *dir, const YCHAR *name)
5463 obj = yaffs_FindObjectByName(dir, name);
5464 return yaffs_UnlinkObject(obj);
5467 /*----------------------- Initialisation Scanning ---------------------- */
5469 static void yaffs_HandleShadowedObject(yaffs_Device *dev, int objId,
5470 int backwardScanning)
5474 if (!backwardScanning) {
5475 /* Handle YAFFS1 forward scanning case
5476 * For YAFFS1 we always do the deletion
5480 /* Handle YAFFS2 case (backward scanning)
5481 * If the shadowed object exists then ignore.
5483 obj = yaffs_FindObjectByNumber(dev, objId);
5488 /* Let's create it (if it does not exist) assuming it is a file so that it can do shrinking etc.
5489 * We put it in unlinked dir to be cleaned up after the scanning
5492 yaffs_FindOrCreateObjectByNumber(dev, objId,
5493 YAFFS_OBJECT_TYPE_FILE);
5496 obj->isShadowed = 1;
5497 yaffs_AddObjectToDirectory(dev->unlinkedDir, obj);
5498 obj->variant.fileVariant.shrinkSize = 0;
5499 obj->valid = 1; /* So that we don't read any other info for this file */
5509 static void yaffs_HardlinkFixup(yaffs_Device *dev, yaffs_Object *hardList)
5516 hardList = (yaffs_Object *) (hardList->hardLinks.next);
5518 in = yaffs_FindObjectByNumber(dev,
5519 hl->variant.hardLinkVariant.
5520 equivalentObjectId);
5523 /* Add the hardlink pointers */
5524 hl->variant.hardLinkVariant.equivalentObject = in;
5525 ylist_add(&hl->hardLinks, &in->hardLinks);
5527 /* Todo Need to report/handle this better.
5528 * Got a problem... hardlink to a non-existant object
5530 hl->variant.hardLinkVariant.equivalentObject = NULL;
5531 YINIT_LIST_HEAD(&hl->hardLinks);
5541 static int ybicmp(const void *a, const void *b)
5543 register int aseq = ((yaffs_BlockIndex *)a)->seq;
5544 register int bseq = ((yaffs_BlockIndex *)b)->seq;
5545 register int ablock = ((yaffs_BlockIndex *)a)->block;
5546 register int bblock = ((yaffs_BlockIndex *)b)->block;
5548 return ablock - bblock;
5554 struct yaffs_ShadowFixerStruct {
5557 struct yaffs_ShadowFixerStruct *next;
5561 static void yaffs_StripDeletedObjects(yaffs_Device *dev)
5564 * Sort out state of unlinked and deleted objects after scanning.
5566 struct ylist_head *i;
5567 struct ylist_head *n;
5570 /* Soft delete all the unlinked files */
5571 ylist_for_each_safe(i, n,
5572 &dev->unlinkedDir->variant.directoryVariant.children) {
5574 l = ylist_entry(i, yaffs_Object, siblings);
5575 yaffs_DeleteObject(l);
5579 ylist_for_each_safe(i, n,
5580 &dev->deletedDir->variant.directoryVariant.children) {
5582 l = ylist_entry(i, yaffs_Object, siblings);
5583 yaffs_DeleteObject(l);
5590 * This code iterates through all the objects making sure that they are rooted.
5591 * Any unrooted objects are re-rooted in lost+found.
5592 * An object needs to be in one of:
5593 * - Directly under deleted, unlinked
5594 * - Directly or indirectly under root.
5597 * This code assumes that we don't ever change the current relationships between
5599 * rootDir->parent == unlinkedDir->parent == deletedDir->parent == NULL
5600 * lostNfound->parent == rootDir
5602 * This fixes the problem where directories might have inadvertently been deleted
5603 * leaving the object "hanging" without being rooted in the directory tree.
5606 static int yaffs_HasNULLParent(yaffs_Device *dev, yaffs_Object *obj)
5608 return (obj == dev->deletedDir ||
5609 obj == dev->unlinkedDir||
5610 obj == dev->rootDir);
5613 static void yaffs_FixHangingObjects(yaffs_Device *dev)
5616 yaffs_Object *parent;
5618 struct ylist_head *lh;
5619 struct ylist_head *n;
5624 /* Iterate through the objects in each hash entry,
5625 * looking at each object.
5626 * Make sure it is rooted.
5629 for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
5630 ylist_for_each_safe(lh, n, &dev->objectBucket[i].list) {
5632 obj = ylist_entry(lh, yaffs_Object, hashLink);
5633 parent= obj->parent;
5635 if(yaffs_HasNULLParent(dev,obj)){
5636 /* These directories are not hanging */
5639 else if(!parent || parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
5641 else if(yaffs_HasNULLParent(dev,parent))
5645 * Need to follow the parent chain to see if it is hanging.
5650 while(parent != dev->rootDir &&
5652 parent->parent->variantType == YAFFS_OBJECT_TYPE_DIRECTORY &&
5654 parent = parent->parent;
5657 if(parent != dev->rootDir)
5662 (TSTR("Hanging object %d moved to lost and found" TENDSTR),
5664 yaffs_AddObjectToDirectory(dev->lostNFoundDir,obj);
5673 * Delete directory contents for cleaning up lost and found.
5675 static void yaffs_DeleteDirectoryContents(yaffs_Object *dir)
5678 struct ylist_head *lh;
5679 struct ylist_head *n;
5681 if(dir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
5684 ylist_for_each_safe(lh, n, &dir->variant.directoryVariant.children) {
5686 obj = ylist_entry(lh, yaffs_Object, siblings);
5687 if(obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY)
5688 yaffs_DeleteDirectoryContents(obj);
5691 (TSTR("Deleting lost_found object %d" TENDSTR),
5694 /* Need to use UnlinkObject since Delete would not handle
5695 * hardlinked objects correctly.
5697 yaffs_UnlinkObject(obj);
5703 static void yaffs_EmptyLostAndFound(yaffs_Device *dev)
5705 yaffs_DeleteDirectoryContents(dev->lostNFoundDir);
5708 static int yaffs_Scan(yaffs_Device *dev)
5710 yaffs_ExtendedTags tags;
5720 yaffs_BlockState state;
5721 yaffs_Object *hardList = NULL;
5722 yaffs_BlockInfo *bi;
5723 __u32 sequenceNumber;
5724 yaffs_ObjectHeader *oh;
5726 yaffs_Object *parent;
5728 int alloc_failed = 0;
5730 struct yaffs_ShadowFixerStruct *shadowFixerList = NULL;
5738 (TSTR("yaffs_Scan starts intstartblk %d intendblk %d..." TENDSTR),
5739 dev->internalStartBlock, dev->internalEndBlock));
5741 chunkData = yaffs_GetTempBuffer(dev, __LINE__);
5743 dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER;
5745 /* Scan all the blocks to determine their state */
5746 for (blk = dev->internalStartBlock; blk <= dev->internalEndBlock; blk++) {
5747 bi = yaffs_GetBlockInfo(dev, blk);
5748 yaffs_ClearChunkBits(dev, blk);
5750 bi->softDeletions = 0;
5752 yaffs_QueryInitialBlockState(dev, blk, &state, &sequenceNumber);
5754 bi->blockState = state;
5755 bi->sequenceNumber = sequenceNumber;
5757 if (bi->sequenceNumber == YAFFS_SEQUENCE_BAD_BLOCK)
5758 bi->blockState = state = YAFFS_BLOCK_STATE_DEAD;
5760 T(YAFFS_TRACE_SCAN_DEBUG,
5761 (TSTR("Block scanning block %d state %d seq %d" TENDSTR), blk,
5762 state, sequenceNumber));
5764 if (state == YAFFS_BLOCK_STATE_DEAD) {
5765 T(YAFFS_TRACE_BAD_BLOCKS,
5766 (TSTR("block %d is bad" TENDSTR), blk));
5767 } else if (state == YAFFS_BLOCK_STATE_EMPTY) {
5768 T(YAFFS_TRACE_SCAN_DEBUG,
5769 (TSTR("Block empty " TENDSTR)));
5770 dev->nErasedBlocks++;
5771 dev->nFreeChunks += dev->nChunksPerBlock;
5775 startIterator = dev->internalStartBlock;
5776 endIterator = dev->internalEndBlock;
5778 /* For each block.... */
5779 for (blockIterator = startIterator; !alloc_failed && blockIterator <= endIterator;
5786 blk = blockIterator;
5788 bi = yaffs_GetBlockInfo(dev, blk);
5789 state = bi->blockState;
5793 /* For each chunk in each block that needs scanning....*/
5794 for (c = 0; !alloc_failed && c < dev->nChunksPerBlock &&
5795 state == YAFFS_BLOCK_STATE_NEEDS_SCANNING; c++) {
5796 /* Read the tags and decide what to do */
5797 chunk = blk * dev->nChunksPerBlock + c;
5799 result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk, NULL,
5802 /* Let's have a good look at this chunk... */
5804 if (tags.eccResult == YAFFS_ECC_RESULT_UNFIXED || tags.chunkDeleted) {
5810 /*T((" %d %d deleted\n",blk,c)); */
5811 } else if (!tags.chunkUsed) {
5812 /* An unassigned chunk in the block
5813 * This means that either the block is empty or
5814 * this is the one being allocated from
5818 /* We're looking at the first chunk in the block so the block is unused */
5819 state = YAFFS_BLOCK_STATE_EMPTY;
5820 dev->nErasedBlocks++;
5822 /* this is the block being allocated from */
5825 (" Allocating from %d %d" TENDSTR),
5827 state = YAFFS_BLOCK_STATE_ALLOCATING;
5828 dev->allocationBlock = blk;
5829 dev->allocationPage = c;
5830 dev->allocationBlockFinder = blk;
5831 /* Set block finder here to encourage the allocator to go forth from here. */
5835 dev->nFreeChunks += (dev->nChunksPerBlock - c);
5836 } else if (tags.chunkId > 0) {
5837 /* chunkId > 0 so it is a data chunk... */
5838 unsigned int endpos;
5840 yaffs_SetChunkBit(dev, blk, c);
5843 in = yaffs_FindOrCreateObjectByNumber(dev,
5846 YAFFS_OBJECT_TYPE_FILE);
5847 /* PutChunkIntoFile checks for a clash (two data chunks with
5848 * the same chunkId).
5855 if (!yaffs_PutChunkIntoFile(in, tags.chunkId, chunk, 1))
5860 (tags.chunkId - 1) * dev->nDataBytesPerChunk +
5863 in->variantType == YAFFS_OBJECT_TYPE_FILE
5864 && in->variant.fileVariant.scannedFileSize <
5866 in->variant.fileVariant.
5867 scannedFileSize = endpos;
5868 if (!dev->useHeaderFileSize) {
5869 in->variant.fileVariant.
5871 in->variant.fileVariant.
5876 /* T((" %d %d data %d %d\n",blk,c,tags.objectId,tags.chunkId)); */
5878 /* chunkId == 0, so it is an ObjectHeader.
5879 * Thus, we read in the object header and make the object
5881 yaffs_SetChunkBit(dev, blk, c);
5884 result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk,
5888 oh = (yaffs_ObjectHeader *) chunkData;
5890 in = yaffs_FindObjectByNumber(dev,
5892 if (in && in->variantType != oh->type) {
5893 /* This should not happen, but somehow
5894 * Wev'e ended up with an objectId that has been reused but not yet
5895 * deleted, and worse still it has changed type. Delete the old object.
5898 yaffs_DeleteObject(in);
5903 in = yaffs_FindOrCreateObjectByNumber(dev,
5911 if (in && oh->shadowsObject > 0) {
5913 struct yaffs_ShadowFixerStruct *fixer;
5914 fixer = YMALLOC(sizeof(struct yaffs_ShadowFixerStruct));
5916 fixer->next = shadowFixerList;
5917 shadowFixerList = fixer;
5918 fixer->objectId = tags.objectId;
5919 fixer->shadowedId = oh->shadowsObject;
5924 if (in && in->valid) {
5925 /* We have already filled this one. We have a duplicate and need to resolve it. */
5927 unsigned existingSerial = in->serial;
5928 unsigned newSerial = tags.serialNumber;
5930 if (((existingSerial + 1) & 3) == newSerial) {
5931 /* Use new one - destroy the exisiting one */
5932 yaffs_DeleteChunk(dev,
5937 /* Use existing - destroy this one. */
5938 yaffs_DeleteChunk(dev, chunk, 1,
5943 if (in && !in->valid &&
5944 (tags.objectId == YAFFS_OBJECTID_ROOT ||
5945 tags.objectId == YAFFS_OBJECTID_LOSTNFOUND)) {
5946 /* We only load some info, don't fiddle with directory structure */
5948 in->variantType = oh->type;
5950 in->yst_mode = oh->yst_mode;
5951 #ifdef CONFIG_YAFFS_WINCE
5952 in->win_atime[0] = oh->win_atime[0];
5953 in->win_ctime[0] = oh->win_ctime[0];
5954 in->win_mtime[0] = oh->win_mtime[0];
5955 in->win_atime[1] = oh->win_atime[1];
5956 in->win_ctime[1] = oh->win_ctime[1];
5957 in->win_mtime[1] = oh->win_mtime[1];
5959 in->yst_uid = oh->yst_uid;
5960 in->yst_gid = oh->yst_gid;
5961 in->yst_atime = oh->yst_atime;
5962 in->yst_mtime = oh->yst_mtime;
5963 in->yst_ctime = oh->yst_ctime;
5964 in->yst_rdev = oh->yst_rdev;
5966 in->hdrChunk = chunk;
5967 in->serial = tags.serialNumber;
5969 } else if (in && !in->valid) {
5970 /* we need to load this info */
5973 in->variantType = oh->type;
5975 in->yst_mode = oh->yst_mode;
5976 #ifdef CONFIG_YAFFS_WINCE
5977 in->win_atime[0] = oh->win_atime[0];
5978 in->win_ctime[0] = oh->win_ctime[0];
5979 in->win_mtime[0] = oh->win_mtime[0];
5980 in->win_atime[1] = oh->win_atime[1];
5981 in->win_ctime[1] = oh->win_ctime[1];
5982 in->win_mtime[1] = oh->win_mtime[1];
5984 in->yst_uid = oh->yst_uid;
5985 in->yst_gid = oh->yst_gid;
5986 in->yst_atime = oh->yst_atime;
5987 in->yst_mtime = oh->yst_mtime;
5988 in->yst_ctime = oh->yst_ctime;
5989 in->yst_rdev = oh->yst_rdev;
5991 in->hdrChunk = chunk;
5992 in->serial = tags.serialNumber;
5994 yaffs_SetObjectName(in, oh->name);
5997 /* directory stuff...
6002 yaffs_FindOrCreateObjectByNumber
6003 (dev, oh->parentObjectId,
6004 YAFFS_OBJECT_TYPE_DIRECTORY);
6007 if (parent && parent->variantType ==
6008 YAFFS_OBJECT_TYPE_UNKNOWN) {
6009 /* Set up as a directory */
6010 parent->variantType =
6011 YAFFS_OBJECT_TYPE_DIRECTORY;
6012 YINIT_LIST_HEAD(&parent->variant.
6015 } else if (!parent || parent->variantType !=
6016 YAFFS_OBJECT_TYPE_DIRECTORY) {
6017 /* Hoosterman, another problem....
6018 * We're trying to use a non-directory as a directory
6021 T(YAFFS_TRACE_ERROR,
6023 ("yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found."
6025 parent = dev->lostNFoundDir;
6028 yaffs_AddObjectToDirectory(parent, in);
6030 if (0 && (parent == dev->deletedDir ||
6031 parent == dev->unlinkedDir)) {
6032 in->deleted = 1; /* If it is unlinked at start up then it wants deleting */
6033 dev->nDeletedFiles++;
6035 /* Note re hardlinks.
6036 * Since we might scan a hardlink before its equivalent object is scanned
6037 * we put them all in a list.
6038 * After scanning is complete, we should have all the objects, so we run through this
6039 * list and fix up all the chains.
6042 switch (in->variantType) {
6043 case YAFFS_OBJECT_TYPE_UNKNOWN:
6044 /* Todo got a problem */
6046 case YAFFS_OBJECT_TYPE_FILE:
6047 if (dev->useHeaderFileSize)
6049 in->variant.fileVariant.
6054 case YAFFS_OBJECT_TYPE_HARDLINK:
6055 in->variant.hardLinkVariant.
6056 equivalentObjectId =
6057 oh->equivalentObjectId;
6058 in->hardLinks.next =
6059 (struct ylist_head *)
6063 case YAFFS_OBJECT_TYPE_DIRECTORY:
6066 case YAFFS_OBJECT_TYPE_SPECIAL:
6069 case YAFFS_OBJECT_TYPE_SYMLINK:
6070 in->variant.symLinkVariant.alias =
6071 yaffs_CloneString(oh->alias);
6072 if (!in->variant.symLinkVariant.alias)
6081 if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
6082 /* If we got this far while scanning, then the block is fully allocated.*/
6083 state = YAFFS_BLOCK_STATE_FULL;
6086 if (state == YAFFS_BLOCK_STATE_ALLOCATING) {
6087 /* If the block was partially allocated then treat it as fully allocated.*/
6088 state = YAFFS_BLOCK_STATE_FULL;
6089 dev->allocationBlock = -1;
6092 bi->blockState = state;
6094 /* Now let's see if it was dirty */
6095 if (bi->pagesInUse == 0 &&
6096 !bi->hasShrinkHeader &&
6097 bi->blockState == YAFFS_BLOCK_STATE_FULL) {
6098 yaffs_BlockBecameDirty(dev, blk);
6104 /* Ok, we've done all the scanning.
6105 * Fix up the hard link chains.
6106 * We should now have scanned all the objects, now it's time to add these
6110 yaffs_HardlinkFixup(dev, hardList);
6112 /* Fix up any shadowed objects */
6114 struct yaffs_ShadowFixerStruct *fixer;
6117 while (shadowFixerList) {
6118 fixer = shadowFixerList;
6119 shadowFixerList = fixer->next;
6120 /* Complete the rename transaction by deleting the shadowed object
6121 * then setting the object header to unshadowed.
6123 obj = yaffs_FindObjectByNumber(dev, fixer->shadowedId);
6125 yaffs_DeleteObject(obj);
6127 obj = yaffs_FindObjectByNumber(dev, fixer->objectId);
6130 yaffs_UpdateObjectHeader(obj, NULL, 1, 0, 0);
6136 yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
6141 T(YAFFS_TRACE_SCAN, (TSTR("yaffs_Scan ends" TENDSTR)));
6147 static void yaffs_CheckObjectDetailsLoaded(yaffs_Object *in)
6150 yaffs_ObjectHeader *oh;
6152 yaffs_ExtendedTags tags;
6154 int alloc_failed = 0;
6162 T(YAFFS_TRACE_SCAN, (TSTR("details for object %d %s loaded" TENDSTR),
6164 in->lazyLoaded ? "not yet" : "already"));
6167 if (in->lazyLoaded && in->hdrChunk > 0) {
6169 chunkData = yaffs_GetTempBuffer(dev, __LINE__);
6171 result = yaffs_ReadChunkWithTagsFromNAND(dev, in->hdrChunk, chunkData, &tags);
6172 oh = (yaffs_ObjectHeader *) chunkData;
6174 in->yst_mode = oh->yst_mode;
6175 #ifdef CONFIG_YAFFS_WINCE
6176 in->win_atime[0] = oh->win_atime[0];
6177 in->win_ctime[0] = oh->win_ctime[0];
6178 in->win_mtime[0] = oh->win_mtime[0];
6179 in->win_atime[1] = oh->win_atime[1];
6180 in->win_ctime[1] = oh->win_ctime[1];
6181 in->win_mtime[1] = oh->win_mtime[1];
6183 in->yst_uid = oh->yst_uid;
6184 in->yst_gid = oh->yst_gid;
6185 in->yst_atime = oh->yst_atime;
6186 in->yst_mtime = oh->yst_mtime;
6187 in->yst_ctime = oh->yst_ctime;
6188 in->yst_rdev = oh->yst_rdev;
6191 yaffs_SetObjectName(in, oh->name);
6193 if (in->variantType == YAFFS_OBJECT_TYPE_SYMLINK) {
6194 in->variant.symLinkVariant.alias =
6195 yaffs_CloneString(oh->alias);
6196 if (!in->variant.symLinkVariant.alias)
6197 alloc_failed = 1; /* Not returned to caller */
6200 yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
6204 static int yaffs_ScanBackwards(yaffs_Device *dev)
6206 yaffs_ExtendedTags tags;
6211 int nBlocksToScan = 0;
6217 yaffs_BlockState state;
6218 yaffs_Object *hardList = NULL;
6219 yaffs_BlockInfo *bi;
6220 __u32 sequenceNumber;
6221 yaffs_ObjectHeader *oh;
6223 yaffs_Object *parent;
6224 int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1;
6230 int foundChunksInBlock;
6231 int equivalentObjectId;
6232 int alloc_failed = 0;
6235 yaffs_BlockIndex *blockIndex = NULL;
6236 int altBlockIndex = 0;
6238 if (!dev->isYaffs2) {
6240 (TSTR("yaffs_ScanBackwards is only for YAFFS2!" TENDSTR)));
6246 ("yaffs_ScanBackwards starts intstartblk %d intendblk %d..."
6247 TENDSTR), dev->internalStartBlock, dev->internalEndBlock));
6250 dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER;
6252 blockIndex = YMALLOC(nBlocks * sizeof(yaffs_BlockIndex));
6255 blockIndex = YMALLOC_ALT(nBlocks * sizeof(yaffs_BlockIndex));
6261 (TSTR("yaffs_Scan() could not allocate block index!" TENDSTR)));
6265 dev->blocksInCheckpoint = 0;
6267 chunkData = yaffs_GetTempBuffer(dev, __LINE__);
6269 /* Scan all the blocks to determine their state */
6270 for (blk = dev->internalStartBlock; blk <= dev->internalEndBlock; blk++) {
6271 bi = yaffs_GetBlockInfo(dev, blk);
6272 yaffs_ClearChunkBits(dev, blk);
6274 bi->softDeletions = 0;
6276 yaffs_QueryInitialBlockState(dev, blk, &state, &sequenceNumber);
6278 bi->blockState = state;
6279 bi->sequenceNumber = sequenceNumber;
6281 if (bi->sequenceNumber == YAFFS_SEQUENCE_CHECKPOINT_DATA)
6282 bi->blockState = state = YAFFS_BLOCK_STATE_CHECKPOINT;
6283 if (bi->sequenceNumber == YAFFS_SEQUENCE_BAD_BLOCK)
6284 bi->blockState = state = YAFFS_BLOCK_STATE_DEAD;
6286 T(YAFFS_TRACE_SCAN_DEBUG,
6287 (TSTR("Block scanning block %d state %d seq %d" TENDSTR), blk,
6288 state, sequenceNumber));
6291 if (state == YAFFS_BLOCK_STATE_CHECKPOINT) {
6292 dev->blocksInCheckpoint++;
6294 } else if (state == YAFFS_BLOCK_STATE_DEAD) {
6295 T(YAFFS_TRACE_BAD_BLOCKS,
6296 (TSTR("block %d is bad" TENDSTR), blk));
6297 } else if (state == YAFFS_BLOCK_STATE_EMPTY) {
6298 T(YAFFS_TRACE_SCAN_DEBUG,
6299 (TSTR("Block empty " TENDSTR)));
6300 dev->nErasedBlocks++;
6301 dev->nFreeChunks += dev->nChunksPerBlock;
6302 } else if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
6304 /* Determine the highest sequence number */
6305 if (sequenceNumber >= YAFFS_LOWEST_SEQUENCE_NUMBER &&
6306 sequenceNumber < YAFFS_HIGHEST_SEQUENCE_NUMBER) {
6308 blockIndex[nBlocksToScan].seq = sequenceNumber;
6309 blockIndex[nBlocksToScan].block = blk;
6313 if (sequenceNumber >= dev->sequenceNumber)
6314 dev->sequenceNumber = sequenceNumber;
6316 /* TODO: Nasty sequence number! */
6319 ("Block scanning block %d has bad sequence number %d"
6320 TENDSTR), blk, sequenceNumber));
6327 (TSTR("%d blocks to be sorted..." TENDSTR), nBlocksToScan));
6333 /* Sort the blocks */
6334 #ifndef CONFIG_YAFFS_USE_OWN_SORT
6336 /* Use qsort now. */
6337 yaffs_qsort(blockIndex, nBlocksToScan, sizeof(yaffs_BlockIndex), ybicmp);
6341 /* Dungy old bubble sort... */
6343 yaffs_BlockIndex temp;
6347 for (i = 0; i < nBlocksToScan; i++)
6348 for (j = i + 1; j < nBlocksToScan; j++)
6349 if (blockIndex[i].seq > blockIndex[j].seq) {
6350 temp = blockIndex[j];
6351 blockIndex[j] = blockIndex[i];
6352 blockIndex[i] = temp;
6359 T(YAFFS_TRACE_SCAN, (TSTR("...done" TENDSTR)));
6361 /* Now scan the blocks looking at the data. */
6363 endIterator = nBlocksToScan - 1;
6364 T(YAFFS_TRACE_SCAN_DEBUG,
6365 (TSTR("%d blocks to be scanned" TENDSTR), nBlocksToScan));
6367 /* For each block.... backwards */
6368 for (blockIterator = endIterator; !alloc_failed && blockIterator >= startIterator;
6370 /* Cooperative multitasking! This loop can run for so
6371 long that watchdog timers expire. */
6374 /* get the block to scan in the correct order */
6375 blk = blockIndex[blockIterator].block;
6377 bi = yaffs_GetBlockInfo(dev, blk);
6380 state = bi->blockState;
6384 /* For each chunk in each block that needs scanning.... */
6385 foundChunksInBlock = 0;
6386 for (c = dev->nChunksPerBlock - 1;
6387 !alloc_failed && c >= 0 &&
6388 (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
6389 state == YAFFS_BLOCK_STATE_ALLOCATING); c--) {
6390 /* Scan backwards...
6391 * Read the tags and decide what to do
6394 chunk = blk * dev->nChunksPerBlock + c;
6396 result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk, NULL,
6399 /* Let's have a good look at this chunk... */
6401 if (!tags.chunkUsed) {
6402 /* An unassigned chunk in the block.
6403 * If there are used chunks after this one, then
6404 * it is a chunk that was skipped due to failing the erased
6405 * check. Just skip it so that it can be deleted.
6406 * But, more typically, We get here when this is an unallocated
6407 * chunk and his means that either the block is empty or
6408 * this is the one being allocated from
6411 if (foundChunksInBlock) {
6412 /* This is a chunk that was skipped due to failing the erased check */
6413 } else if (c == 0) {
6414 /* We're looking at the first chunk in the block so the block is unused */
6415 state = YAFFS_BLOCK_STATE_EMPTY;
6416 dev->nErasedBlocks++;
6418 if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
6419 state == YAFFS_BLOCK_STATE_ALLOCATING) {
6420 if (dev->sequenceNumber == bi->sequenceNumber) {
6421 /* this is the block being allocated from */
6425 (" Allocating from %d %d"
6428 state = YAFFS_BLOCK_STATE_ALLOCATING;
6429 dev->allocationBlock = blk;
6430 dev->allocationPage = c;
6431 dev->allocationBlockFinder = blk;
6433 /* This is a partially written block that is not
6434 * the current allocation block.
6437 T(YAFFS_TRACE_ALWAYS,
6438 (TSTR("Partially written block %d detected" TENDSTR),
6446 } else if (tags.eccResult == YAFFS_ECC_RESULT_UNFIXED) {
6448 (TSTR(" Unfixed ECC in chunk(%d:%d), chunk ignored"TENDSTR),
6453 } else if (tags.chunkId > 0) {
6454 /* chunkId > 0 so it is a data chunk... */
6455 unsigned int endpos;
6457 (tags.chunkId - 1) * dev->nDataBytesPerChunk;
6459 foundChunksInBlock = 1;
6462 yaffs_SetChunkBit(dev, blk, c);
6465 in = yaffs_FindOrCreateObjectByNumber(dev,
6468 YAFFS_OBJECT_TYPE_FILE);
6475 in->variantType == YAFFS_OBJECT_TYPE_FILE
6477 in->variant.fileVariant.shrinkSize) {
6478 /* This has not been invalidated by a resize */
6479 if (!yaffs_PutChunkIntoFile(in, tags.chunkId,
6484 /* File size is calculated by looking at the data chunks if we have not
6485 * seen an object header yet. Stop this practice once we find an object header.
6489 1) * dev->nDataBytesPerChunk +
6492 if (!in->valid && /* have not got an object header yet */
6493 in->variant.fileVariant.
6494 scannedFileSize < endpos) {
6495 in->variant.fileVariant.
6496 scannedFileSize = endpos;
6497 in->variant.fileVariant.
6499 in->variant.fileVariant.
6504 /* This chunk has been invalidated by a resize, so delete */
6505 yaffs_DeleteChunk(dev, chunk, 1, __LINE__);
6509 /* chunkId == 0, so it is an ObjectHeader.
6510 * Thus, we read in the object header and make the object
6512 foundChunksInBlock = 1;
6514 yaffs_SetChunkBit(dev, blk, c);
6520 if (tags.extraHeaderInfoAvailable) {
6521 in = yaffs_FindOrCreateObjectByNumber
6522 (dev, tags.objectId,
6523 tags.extraObjectType);
6529 (!in->valid && dev->disableLazyLoad) ||
6530 tags.extraShadows ||
6532 (tags.objectId == YAFFS_OBJECTID_ROOT ||
6533 tags.objectId == YAFFS_OBJECTID_LOSTNFOUND))) {
6535 /* If we don't have valid info then we need to read the chunk
6536 * TODO In future we can probably defer reading the chunk and
6537 * living with invalid data until needed.
6540 result = yaffs_ReadChunkWithTagsFromNAND(dev,
6545 oh = (yaffs_ObjectHeader *) chunkData;
6547 if (dev->inbandTags) {
6548 /* Fix up the header if they got corrupted by inband tags */
6549 oh->shadowsObject = oh->inbandShadowsObject;
6550 oh->isShrink = oh->inbandIsShrink;
6554 in = yaffs_FindOrCreateObjectByNumber(dev, tags.objectId, oh->type);
6562 /* TODO Hoosterman we have a problem! */
6563 T(YAFFS_TRACE_ERROR,
6565 ("yaffs tragedy: Could not make object for object %d at chunk %d during scan"
6566 TENDSTR), tags.objectId, chunk));
6571 /* We have already filled this one.
6572 * We have a duplicate that will be discarded, but
6573 * we first have to suck out resize info if it is a file.
6576 if ((in->variantType == YAFFS_OBJECT_TYPE_FILE) &&
6578 oh->type == YAFFS_OBJECT_TYPE_FILE) ||
6579 (tags.extraHeaderInfoAvailable &&
6580 tags.extraObjectType == YAFFS_OBJECT_TYPE_FILE))) {
6582 (oh) ? oh->fileSize : tags.
6584 __u32 parentObjectId =
6586 parentObjectId : tags.
6587 extraParentObjectId;
6591 (oh) ? oh->isShrink : tags.
6592 extraIsShrinkHeader;
6594 /* If it is deleted (unlinked at start also means deleted)
6595 * we treat the file size as being zeroed at this point.
6597 if (parentObjectId ==
6598 YAFFS_OBJECTID_DELETED
6599 || parentObjectId ==
6600 YAFFS_OBJECTID_UNLINKED) {
6606 in->variant.fileVariant.
6607 shrinkSize > thisSize) {
6608 in->variant.fileVariant.
6614 bi->hasShrinkHeader = 1;
6617 /* Use existing - destroy this one. */
6618 yaffs_DeleteChunk(dev, chunk, 1, __LINE__);
6622 if (!in->valid && in->variantType !=
6623 (oh ? oh->type : tags.extraObjectType))
6624 T(YAFFS_TRACE_ERROR, (
6625 TSTR("yaffs tragedy: Bad object type, "
6626 TCONT("%d != %d, for object %d at chunk ")
6627 TCONT("%d during scan")
6629 oh->type : tags.extraObjectType,
6630 in->variantType, tags.objectId,
6634 (tags.objectId == YAFFS_OBJECTID_ROOT ||
6636 YAFFS_OBJECTID_LOSTNFOUND)) {
6637 /* We only load some info, don't fiddle with directory structure */
6641 in->variantType = oh->type;
6643 in->yst_mode = oh->yst_mode;
6644 #ifdef CONFIG_YAFFS_WINCE
6645 in->win_atime[0] = oh->win_atime[0];
6646 in->win_ctime[0] = oh->win_ctime[0];
6647 in->win_mtime[0] = oh->win_mtime[0];
6648 in->win_atime[1] = oh->win_atime[1];
6649 in->win_ctime[1] = oh->win_ctime[1];
6650 in->win_mtime[1] = oh->win_mtime[1];
6652 in->yst_uid = oh->yst_uid;
6653 in->yst_gid = oh->yst_gid;
6654 in->yst_atime = oh->yst_atime;
6655 in->yst_mtime = oh->yst_mtime;
6656 in->yst_ctime = oh->yst_ctime;
6657 in->yst_rdev = oh->yst_rdev;
6661 in->variantType = tags.extraObjectType;
6665 in->hdrChunk = chunk;
6667 } else if (!in->valid) {
6668 /* we need to load this info */
6671 in->hdrChunk = chunk;
6674 in->variantType = oh->type;
6676 in->yst_mode = oh->yst_mode;
6677 #ifdef CONFIG_YAFFS_WINCE
6678 in->win_atime[0] = oh->win_atime[0];
6679 in->win_ctime[0] = oh->win_ctime[0];
6680 in->win_mtime[0] = oh->win_mtime[0];
6681 in->win_atime[1] = oh->win_atime[1];
6682 in->win_ctime[1] = oh->win_ctime[1];
6683 in->win_mtime[1] = oh->win_mtime[1];
6685 in->yst_uid = oh->yst_uid;
6686 in->yst_gid = oh->yst_gid;
6687 in->yst_atime = oh->yst_atime;
6688 in->yst_mtime = oh->yst_mtime;
6689 in->yst_ctime = oh->yst_ctime;
6690 in->yst_rdev = oh->yst_rdev;
6693 if (oh->shadowsObject > 0)
6694 yaffs_HandleShadowedObject(dev,
6701 yaffs_SetObjectName(in, oh->name);
6703 yaffs_FindOrCreateObjectByNumber
6704 (dev, oh->parentObjectId,
6705 YAFFS_OBJECT_TYPE_DIRECTORY);
6707 fileSize = oh->fileSize;
6708 isShrink = oh->isShrink;
6709 equivalentObjectId = oh->equivalentObjectId;
6712 in->variantType = tags.extraObjectType;
6714 yaffs_FindOrCreateObjectByNumber
6715 (dev, tags.extraParentObjectId,
6716 YAFFS_OBJECT_TYPE_DIRECTORY);
6717 fileSize = tags.extraFileLength;
6718 isShrink = tags.extraIsShrinkHeader;
6719 equivalentObjectId = tags.extraEquivalentObjectId;
6728 /* directory stuff...
6732 if (parent && parent->variantType ==
6733 YAFFS_OBJECT_TYPE_UNKNOWN) {
6734 /* Set up as a directory */
6735 parent->variantType =
6736 YAFFS_OBJECT_TYPE_DIRECTORY;
6737 YINIT_LIST_HEAD(&parent->variant.
6740 } else if (!parent || parent->variantType !=
6741 YAFFS_OBJECT_TYPE_DIRECTORY) {
6742 /* Hoosterman, another problem....
6743 * We're trying to use a non-directory as a directory
6746 T(YAFFS_TRACE_ERROR,
6748 ("yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found."
6750 parent = dev->lostNFoundDir;
6753 yaffs_AddObjectToDirectory(parent, in);
6755 itsUnlinked = (parent == dev->deletedDir) ||
6756 (parent == dev->unlinkedDir);
6759 /* Mark the block as having a shrinkHeader */
6760 bi->hasShrinkHeader = 1;
6763 /* Note re hardlinks.
6764 * Since we might scan a hardlink before its equivalent object is scanned
6765 * we put them all in a list.
6766 * After scanning is complete, we should have all the objects, so we run
6767 * through this list and fix up all the chains.
6770 switch (in->variantType) {
6771 case YAFFS_OBJECT_TYPE_UNKNOWN:
6772 /* Todo got a problem */
6774 case YAFFS_OBJECT_TYPE_FILE:
6776 if (in->variant.fileVariant.
6777 scannedFileSize < fileSize) {
6778 /* This covers the case where the file size is greater
6779 * than where the data is
6780 * This will happen if the file is resized to be larger
6781 * than its current data extents.
6783 in->variant.fileVariant.fileSize = fileSize;
6784 in->variant.fileVariant.scannedFileSize =
6785 in->variant.fileVariant.fileSize;
6789 in->variant.fileVariant.shrinkSize > fileSize) {
6790 in->variant.fileVariant.shrinkSize = fileSize;
6794 case YAFFS_OBJECT_TYPE_HARDLINK:
6796 in->variant.hardLinkVariant.equivalentObjectId =
6798 in->hardLinks.next =
6799 (struct ylist_head *) hardList;
6803 case YAFFS_OBJECT_TYPE_DIRECTORY:
6806 case YAFFS_OBJECT_TYPE_SPECIAL:
6809 case YAFFS_OBJECT_TYPE_SYMLINK:
6811 in->variant.symLinkVariant.alias =
6812 yaffs_CloneString(oh->alias);
6813 if (!in->variant.symLinkVariant.alias)
6823 } /* End of scanning for each chunk */
6825 if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
6826 /* If we got this far while scanning, then the block is fully allocated. */
6827 state = YAFFS_BLOCK_STATE_FULL;
6831 bi->blockState = state;
6833 /* Now let's see if it was dirty */
6834 if (bi->pagesInUse == 0 &&
6835 !bi->hasShrinkHeader &&
6836 bi->blockState == YAFFS_BLOCK_STATE_FULL) {
6837 yaffs_BlockBecameDirty(dev, blk);
6842 yaffs_SkipRestOfBlock(dev);
6845 YFREE_ALT(blockIndex);
6849 /* Ok, we've done all the scanning.
6850 * Fix up the hard link chains.
6851 * We should now have scanned all the objects, now it's time to add these
6854 yaffs_HardlinkFixup(dev, hardList);
6857 yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
6862 T(YAFFS_TRACE_SCAN, (TSTR("yaffs_ScanBackwards ends" TENDSTR)));
6867 /*------------------------------ Directory Functions ----------------------------- */
6869 static void yaffs_VerifyObjectInDirectory(yaffs_Object *obj)
6871 struct ylist_head *lh;
6872 yaffs_Object *listObj;
6877 T(YAFFS_TRACE_ALWAYS, (TSTR("No object to verify" TENDSTR)));
6882 if (yaffs_SkipVerification(obj->myDev))
6886 T(YAFFS_TRACE_ALWAYS, (TSTR("Object does not have parent" TENDSTR)));
6891 if (obj->parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
6892 T(YAFFS_TRACE_ALWAYS, (TSTR("Parent is not directory" TENDSTR)));
6896 /* Iterate through the objects in each hash entry */
6898 ylist_for_each(lh, &obj->parent->variant.directoryVariant.children) {
6900 listObj = ylist_entry(lh, yaffs_Object, siblings);
6901 yaffs_VerifyObject(listObj);
6908 T(YAFFS_TRACE_ALWAYS, (TSTR("Object in directory %d times" TENDSTR), count));
6913 static void yaffs_VerifyDirectory(yaffs_Object *directory)
6915 struct ylist_head *lh;
6916 yaffs_Object *listObj;
6923 if (yaffs_SkipFullVerification(directory->myDev))
6926 if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
6927 T(YAFFS_TRACE_ALWAYS, (TSTR("Directory has wrong type: %d" TENDSTR), directory->variantType));
6931 /* Iterate through the objects in each hash entry */
6933 ylist_for_each(lh, &directory->variant.directoryVariant.children) {
6935 listObj = ylist_entry(lh, yaffs_Object, siblings);
6936 if (listObj->parent != directory) {
6937 T(YAFFS_TRACE_ALWAYS, (TSTR("Object in directory list has wrong parent %p" TENDSTR), listObj->parent));
6940 yaffs_VerifyObjectInDirectory(listObj);
6946 *yaffs_UpdateParent() handles fixing a directories mtime and ctime when a new
6947 * link (ie. name) is created or deleted in the directory.
6950 * create dir/a : update dir's mtime/ctime
6951 * rm dir/a: update dir's mtime/ctime
6952 * modify dir/a: don't update dir's mtimme/ctime
6955 static void yaffs_UpdateParent(yaffs_Object *obj)
6961 obj->yst_mtime = obj->yst_ctime = Y_CURRENT_TIME;
6963 yaffs_UpdateObjectHeader(obj,NULL,0,0,0);
6966 static void yaffs_RemoveObjectFromDirectory(yaffs_Object *obj)
6968 yaffs_Device *dev = obj->myDev;
6969 yaffs_Object *parent;
6971 yaffs_VerifyObjectInDirectory(obj);
6972 parent = obj->parent;
6974 yaffs_VerifyDirectory(parent);
6976 if (dev && dev->removeObjectCallback)
6977 dev->removeObjectCallback(obj);
6980 ylist_del_init(&obj->siblings);
6983 yaffs_VerifyDirectory(parent);
6986 static void yaffs_AddObjectToDirectory(yaffs_Object *directory,
6990 T(YAFFS_TRACE_ALWAYS,
6992 ("tragedy: Trying to add an object to a null pointer directory"
6997 if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
6998 T(YAFFS_TRACE_ALWAYS,
7000 ("tragedy: Trying to add an object to a non-directory"
7005 if (obj->siblings.prev == NULL) {
7006 /* Not initialised */
7011 yaffs_VerifyDirectory(directory);
7013 yaffs_RemoveObjectFromDirectory(obj);
7017 ylist_add(&obj->siblings, &directory->variant.directoryVariant.children);
7018 obj->parent = directory;
7020 if (directory == obj->myDev->unlinkedDir
7021 || directory == obj->myDev->deletedDir) {
7023 obj->myDev->nUnlinkedFiles++;
7024 obj->renameAllowed = 0;
7027 yaffs_VerifyDirectory(directory);
7028 yaffs_VerifyObjectInDirectory(obj);
7031 yaffs_Object *yaffs_FindObjectByName(yaffs_Object *directory,
7036 struct ylist_head *i;
7037 YCHAR buffer[YAFFS_MAX_NAME_LENGTH + 1];
7045 T(YAFFS_TRACE_ALWAYS,
7047 ("tragedy: yaffs_FindObjectByName: null pointer directory"
7052 if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
7053 T(YAFFS_TRACE_ALWAYS,
7055 ("tragedy: yaffs_FindObjectByName: non-directory" TENDSTR)));
7059 sum = yaffs_CalcNameSum(name);
7061 ylist_for_each(i, &directory->variant.directoryVariant.children) {
7063 l = ylist_entry(i, yaffs_Object, siblings);
7065 if (l->parent != directory)
7068 yaffs_CheckObjectDetailsLoaded(l);
7070 /* Special case for lost-n-found */
7071 if (l->objectId == YAFFS_OBJECTID_LOSTNFOUND) {
7072 if (yaffs_strcmp(name, YAFFS_LOSTNFOUND_NAME) == 0)
7074 } else if (yaffs_SumCompare(l->sum, sum) || l->hdrChunk <= 0) {
7075 /* LostnFound chunk called Objxxx
7078 yaffs_GetObjectName(l, buffer,
7079 YAFFS_MAX_NAME_LENGTH + 1);
7080 if (yaffs_strncmp(name, buffer, YAFFS_MAX_NAME_LENGTH) == 0)
7091 int yaffs_ApplyToDirectoryChildren(yaffs_Object *theDir,
7092 int (*fn) (yaffs_Object *))
7094 struct ylist_head *i;
7098 T(YAFFS_TRACE_ALWAYS,
7100 ("tragedy: yaffs_FindObjectByName: null pointer directory"
7105 if (theDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
7106 T(YAFFS_TRACE_ALWAYS,
7108 ("tragedy: yaffs_FindObjectByName: non-directory" TENDSTR)));
7113 ylist_for_each(i, &theDir->variant.directoryVariant.children) {
7115 l = ylist_entry(i, yaffs_Object, siblings);
7126 /* GetEquivalentObject dereferences any hard links to get to the
7130 yaffs_Object *yaffs_GetEquivalentObject(yaffs_Object *obj)
7132 if (obj && obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) {
7133 /* We want the object id of the equivalent object, not this one */
7134 obj = obj->variant.hardLinkVariant.equivalentObject;
7135 yaffs_CheckObjectDetailsLoaded(obj);
7140 int yaffs_GetObjectName(yaffs_Object *obj, YCHAR *name, int buffSize)
7142 memset(name, 0, buffSize * sizeof(YCHAR));
7144 yaffs_CheckObjectDetailsLoaded(obj);
7146 if (obj->objectId == YAFFS_OBJECTID_LOSTNFOUND) {
7147 yaffs_strncpy(name, YAFFS_LOSTNFOUND_NAME, buffSize - 1);
7148 } else if (obj->hdrChunk <= 0) {
7150 YCHAR numString[20];
7151 YCHAR *x = &numString[19];
7152 unsigned v = obj->objectId;
7156 *x = '0' + (v % 10);
7159 /* make up a name */
7160 yaffs_strcpy(locName, YAFFS_LOSTNFOUND_PREFIX);
7161 yaffs_strcat(locName, x);
7162 yaffs_strncpy(name, locName, buffSize - 1);
7165 #ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM
7166 else if (obj->shortName[0])
7167 yaffs_strncpy(name, obj->shortName,YAFFS_SHORT_NAME_LENGTH+1);
7171 __u8 *buffer = yaffs_GetTempBuffer(obj->myDev, __LINE__);
7173 yaffs_ObjectHeader *oh = (yaffs_ObjectHeader *) buffer;
7175 memset(buffer, 0, obj->myDev->nDataBytesPerChunk);
7177 if (obj->hdrChunk > 0) {
7178 result = yaffs_ReadChunkWithTagsFromNAND(obj->myDev,
7179 obj->hdrChunk, buffer,
7182 yaffs_strncpy(name, oh->name, buffSize - 1);
7185 yaffs_ReleaseTempBuffer(obj->myDev, buffer, __LINE__);
7188 return yaffs_strnlen(name,buffSize-1);
7191 int yaffs_GetObjectFileLength(yaffs_Object *obj)
7193 /* Dereference any hard linking */
7194 obj = yaffs_GetEquivalentObject(obj);
7196 if (obj->variantType == YAFFS_OBJECT_TYPE_FILE)
7197 return obj->variant.fileVariant.fileSize;
7198 if (obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK){
7199 if(!obj->variant.symLinkVariant.alias)
7201 return yaffs_strnlen(obj->variant.symLinkVariant.alias,YAFFS_MAX_ALIAS_LENGTH);
7203 /* Only a directory should drop through to here */
7204 return obj->myDev->nDataBytesPerChunk;
7208 int yaffs_GetObjectLinkCount(yaffs_Object *obj)
7211 struct ylist_head *i;
7214 count++; /* the object itself */
7216 ylist_for_each(i, &obj->hardLinks)
7217 count++; /* add the hard links; */
7222 int yaffs_GetObjectInode(yaffs_Object *obj)
7224 obj = yaffs_GetEquivalentObject(obj);
7226 return obj->objectId;
7229 unsigned yaffs_GetObjectType(yaffs_Object *obj)
7231 obj = yaffs_GetEquivalentObject(obj);
7233 switch (obj->variantType) {
7234 case YAFFS_OBJECT_TYPE_FILE:
7237 case YAFFS_OBJECT_TYPE_DIRECTORY:
7240 case YAFFS_OBJECT_TYPE_SYMLINK:
7243 case YAFFS_OBJECT_TYPE_HARDLINK:
7246 case YAFFS_OBJECT_TYPE_SPECIAL:
7247 if (S_ISFIFO(obj->yst_mode))
7249 if (S_ISCHR(obj->yst_mode))
7251 if (S_ISBLK(obj->yst_mode))
7253 if (S_ISSOCK(obj->yst_mode))
7261 YCHAR *yaffs_GetSymlinkAlias(yaffs_Object *obj)
7263 obj = yaffs_GetEquivalentObject(obj);
7264 if (obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK)
7265 return yaffs_CloneString(obj->variant.symLinkVariant.alias);
7267 return yaffs_CloneString(_Y(""));
7270 #ifndef CONFIG_YAFFS_WINCE
7272 int yaffs_SetAttributes(yaffs_Object *obj, struct iattr *attr)
7274 unsigned int valid = attr->ia_valid;
7276 if (valid & ATTR_MODE)
7277 obj->yst_mode = attr->ia_mode;
7278 if (valid & ATTR_UID)
7279 obj->yst_uid = attr->ia_uid;
7280 if (valid & ATTR_GID)
7281 obj->yst_gid = attr->ia_gid;
7283 if (valid & ATTR_ATIME)
7284 obj->yst_atime = Y_TIME_CONVERT(attr->ia_atime);
7285 if (valid & ATTR_CTIME)
7286 obj->yst_ctime = Y_TIME_CONVERT(attr->ia_ctime);
7287 if (valid & ATTR_MTIME)
7288 obj->yst_mtime = Y_TIME_CONVERT(attr->ia_mtime);
7290 if (valid & ATTR_SIZE)
7291 yaffs_ResizeFile(obj, attr->ia_size);
7293 yaffs_UpdateObjectHeader(obj, NULL, 1, 0, 0);
7298 int yaffs_GetAttributes(yaffs_Object *obj, struct iattr *attr)
7300 unsigned int valid = 0;
7302 attr->ia_mode = obj->yst_mode;
7304 attr->ia_uid = obj->yst_uid;
7306 attr->ia_gid = obj->yst_gid;
7309 Y_TIME_CONVERT(attr->ia_atime) = obj->yst_atime;
7310 valid |= ATTR_ATIME;
7311 Y_TIME_CONVERT(attr->ia_ctime) = obj->yst_ctime;
7312 valid |= ATTR_CTIME;
7313 Y_TIME_CONVERT(attr->ia_mtime) = obj->yst_mtime;
7314 valid |= ATTR_MTIME;
7316 attr->ia_size = yaffs_GetFileSize(obj);
7319 attr->ia_valid = valid;
7327 int yaffs_DumpObject(yaffs_Object *obj)
7331 yaffs_GetObjectName(obj, name, YAFFS_MAX_NAME_LENGTH + 1);
7333 T(YAFFS_TRACE_ALWAYS,
7335 ("Object %d, inode %d \"%s\"\n dirty %d valid %d serial %d sum %d"
7336 " chunk %d type %d size %d\n"
7337 TENDSTR), obj->objectId, yaffs_GetObjectInode(obj), name,
7338 obj->dirty, obj->valid, obj->serial, obj->sum, obj->hdrChunk,
7339 yaffs_GetObjectType(obj), yaffs_GetObjectFileLength(obj)));
7345 /*---------------------------- Initialisation code -------------------------------------- */
7347 static int yaffs_CheckDevFunctions(const yaffs_Device *dev)
7350 /* Common functions, gotta have */
7351 if (!dev->eraseBlockInNAND || !dev->initialiseNAND)
7354 #ifdef CONFIG_YAFFS_YAFFS2
7356 /* Can use the "with tags" style interface for yaffs1 or yaffs2 */
7357 if (dev->writeChunkWithTagsToNAND &&
7358 dev->readChunkWithTagsFromNAND &&
7359 !dev->writeChunkToNAND &&
7360 !dev->readChunkFromNAND &&
7361 dev->markNANDBlockBad && dev->queryNANDBlock)
7365 /* Can use the "spare" style interface for yaffs1 */
7366 if (!dev->isYaffs2 &&
7367 !dev->writeChunkWithTagsToNAND &&
7368 !dev->readChunkWithTagsFromNAND &&
7369 dev->writeChunkToNAND &&
7370 dev->readChunkFromNAND &&
7371 !dev->markNANDBlockBad && !dev->queryNANDBlock)
7378 static int yaffs_CreateInitialDirectories(yaffs_Device *dev)
7380 /* Initialise the unlinked, deleted, root and lost and found directories */
7382 dev->lostNFoundDir = dev->rootDir = NULL;
7383 dev->unlinkedDir = dev->deletedDir = NULL;
7386 yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_UNLINKED, S_IFDIR);
7389 yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_DELETED, S_IFDIR);
7392 yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_ROOT,
7393 YAFFS_ROOT_MODE | S_IFDIR);
7394 dev->lostNFoundDir =
7395 yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_LOSTNFOUND,
7396 YAFFS_LOSTNFOUND_MODE | S_IFDIR);
7398 if (dev->lostNFoundDir && dev->rootDir && dev->unlinkedDir && dev->deletedDir) {
7399 yaffs_AddObjectToDirectory(dev->rootDir, dev->lostNFoundDir);
7406 int yaffs_GutsInitialise(yaffs_Device *dev)
7408 int init_failed = 0;
7412 T(YAFFS_TRACE_TRACING, (TSTR("yaffs: yaffs_GutsInitialise()" TENDSTR)));
7414 /* Check stuff that must be set */
7417 T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Need a device" TENDSTR)));
7421 dev->internalStartBlock = dev->startBlock;
7422 dev->internalEndBlock = dev->endBlock;
7423 dev->blockOffset = 0;
7424 dev->chunkOffset = 0;
7425 dev->nFreeChunks = 0;
7429 if (dev->startBlock == 0) {
7430 dev->internalStartBlock = dev->startBlock + 1;
7431 dev->internalEndBlock = dev->endBlock + 1;
7432 dev->blockOffset = 1;
7433 dev->chunkOffset = dev->nChunksPerBlock;
7436 /* Check geometry parameters. */
7438 if ((!dev->inbandTags && dev->isYaffs2 && dev->totalBytesPerChunk < 1024) ||
7439 (!dev->isYaffs2 && dev->totalBytesPerChunk < 512) ||
7440 (dev->inbandTags && !dev->isYaffs2) ||
7441 dev->nChunksPerBlock < 2 ||
7442 dev->nReservedBlocks < 2 ||
7443 dev->internalStartBlock <= 0 ||
7444 dev->internalEndBlock <= 0 ||
7445 dev->internalEndBlock <= (dev->internalStartBlock + dev->nReservedBlocks + 2)) { /* otherwise it is too small */
7446 T(YAFFS_TRACE_ALWAYS,
7448 ("yaffs: NAND geometry problems: chunk size %d, type is yaffs%s, inbandTags %d "
7449 TENDSTR), dev->totalBytesPerChunk, dev->isYaffs2 ? "2" : "", dev->inbandTags));
7453 if (yaffs_InitialiseNAND(dev) != YAFFS_OK) {
7454 T(YAFFS_TRACE_ALWAYS,
7455 (TSTR("yaffs: InitialiseNAND failed" TENDSTR)));
7459 /* Sort out space for inband tags, if required */
7460 if (dev->inbandTags)
7461 dev->nDataBytesPerChunk = dev->totalBytesPerChunk - sizeof(yaffs_PackedTags2TagsPart);
7463 dev->nDataBytesPerChunk = dev->totalBytesPerChunk;
7465 /* Got the right mix of functions? */
7466 if (!yaffs_CheckDevFunctions(dev)) {
7467 /* Function missing */
7468 T(YAFFS_TRACE_ALWAYS,
7470 ("yaffs: device function(s) missing or wrong\n" TENDSTR)));
7475 /* This is really a compilation check. */
7476 if (!yaffs_CheckStructures()) {
7477 T(YAFFS_TRACE_ALWAYS,
7478 (TSTR("yaffs_CheckStructures failed\n" TENDSTR)));
7482 if (dev->isMounted) {
7483 T(YAFFS_TRACE_ALWAYS,
7484 (TSTR("yaffs: device already mounted\n" TENDSTR)));
7488 /* Finished with most checks. One or two more checks happen later on too. */
7492 /* OK now calculate a few things for the device */
7495 * Calculate all the chunk size manipulation numbers:
7497 x = dev->nDataBytesPerChunk;
7498 /* We always use dev->chunkShift and dev->chunkDiv */
7499 dev->chunkShift = Shifts(x);
7500 x >>= dev->chunkShift;
7502 /* We only use chunk mask if chunkDiv is 1 */
7503 dev->chunkMask = (1<<dev->chunkShift) - 1;
7506 * Calculate chunkGroupBits.
7507 * We need to find the next power of 2 > than internalEndBlock
7510 x = dev->nChunksPerBlock * (dev->internalEndBlock + 1);
7514 /* Set up tnode width if wide tnodes are enabled. */
7515 if (!dev->wideTnodesDisabled) {
7516 /* bits must be even so that we end up with 32-bit words */
7520 dev->tnodeWidth = 16;
7522 dev->tnodeWidth = bits;
7524 dev->tnodeWidth = 16;
7526 dev->tnodeMask = (1<<dev->tnodeWidth)-1;
7528 /* Level0 Tnodes are 16 bits or wider (if wide tnodes are enabled),
7529 * so if the bitwidth of the
7530 * chunk range we're using is greater than 16 we need
7531 * to figure out chunk shift and chunkGroupSize
7534 if (bits <= dev->tnodeWidth)
7535 dev->chunkGroupBits = 0;
7537 dev->chunkGroupBits = bits - dev->tnodeWidth;
7540 dev->chunkGroupSize = 1 << dev->chunkGroupBits;
7542 if (dev->nChunksPerBlock < dev->chunkGroupSize) {
7543 /* We have a problem because the soft delete won't work if
7544 * the chunk group size > chunks per block.
7545 * This can be remedied by using larger "virtual blocks".
7547 T(YAFFS_TRACE_ALWAYS,
7548 (TSTR("yaffs: chunk group too large\n" TENDSTR)));
7553 /* OK, we've finished verifying the device, lets continue with initialisation */
7555 /* More device initialisation */
7556 dev->garbageCollections = 0;
7557 dev->passiveGarbageCollections = 0;
7558 dev->currentDirtyChecker = 0;
7559 dev->bufferedBlock = -1;
7560 dev->doingBufferedBlockRewrite = 0;
7561 dev->nDeletedFiles = 0;
7562 dev->nBackgroundDeletions = 0;
7563 dev->nUnlinkedFiles = 0;
7565 dev->eccUnfixed = 0;
7566 dev->tagsEccFixed = 0;
7567 dev->tagsEccUnfixed = 0;
7568 dev->nErasureFailures = 0;
7569 dev->nErasedBlocks = 0;
7571 dev->hasPendingPrioritisedGCs = 1; /* Assume the worst for now, will get fixed on first GC */
7573 /* Initialise temporary buffers and caches. */
7574 if (!yaffs_InitialiseTempBuffers(dev))
7577 dev->srCache = NULL;
7578 dev->gcCleanupList = NULL;
7582 dev->nShortOpCaches > 0) {
7585 int srCacheBytes = dev->nShortOpCaches * sizeof(yaffs_ChunkCache);
7587 if (dev->nShortOpCaches > YAFFS_MAX_SHORT_OP_CACHES)
7588 dev->nShortOpCaches = YAFFS_MAX_SHORT_OP_CACHES;
7590 dev->srCache = YMALLOC(srCacheBytes);
7592 buf = (__u8 *) dev->srCache;
7595 memset(dev->srCache, 0, srCacheBytes);
7597 for (i = 0; i < dev->nShortOpCaches && buf; i++) {
7598 dev->srCache[i].object = NULL;
7599 dev->srCache[i].lastUse = 0;
7600 dev->srCache[i].dirty = 0;
7601 dev->srCache[i].data = buf = YMALLOC_DMA(dev->totalBytesPerChunk);
7612 dev->gcCleanupList = YMALLOC(dev->nChunksPerBlock * sizeof(__u32));
7613 if (!dev->gcCleanupList)
7618 dev->useHeaderFileSize = 1;
7620 if (!init_failed && !yaffs_InitialiseBlocks(dev))
7623 yaffs_InitialiseTnodes(dev);
7624 yaffs_InitialiseObjects(dev);
7626 if (!init_failed && !yaffs_CreateInitialDirectories(dev))
7631 /* Now scan the flash. */
7632 if (dev->isYaffs2) {
7633 if (yaffs_CheckpointRestore(dev)) {
7634 yaffs_CheckObjectDetailsLoaded(dev->rootDir);
7635 T(YAFFS_TRACE_ALWAYS,
7636 (TSTR("yaffs: restored from checkpoint" TENDSTR)));
7639 /* Clean up the mess caused by an aborted checkpoint load
7640 * and scan backwards.
7642 yaffs_DeinitialiseBlocks(dev);
7643 yaffs_DeinitialiseTnodes(dev);
7644 yaffs_DeinitialiseObjects(dev);
7647 dev->nErasedBlocks = 0;
7648 dev->nFreeChunks = 0;
7649 dev->allocationBlock = -1;
7650 dev->allocationPage = -1;
7651 dev->nDeletedFiles = 0;
7652 dev->nUnlinkedFiles = 0;
7653 dev->nBackgroundDeletions = 0;
7654 dev->oldestDirtySequence = 0;
7656 if (!init_failed && !yaffs_InitialiseBlocks(dev))
7659 yaffs_InitialiseTnodes(dev);
7660 yaffs_InitialiseObjects(dev);
7662 if (!init_failed && !yaffs_CreateInitialDirectories(dev))
7665 if (!init_failed && !yaffs_ScanBackwards(dev))
7668 } else if (!yaffs_Scan(dev))
7671 yaffs_StripDeletedObjects(dev);
7672 yaffs_FixHangingObjects(dev);
7673 if(dev->emptyLostAndFound)
7674 yaffs_EmptyLostAndFound(dev);
7678 /* Clean up the mess */
7679 T(YAFFS_TRACE_TRACING,
7680 (TSTR("yaffs: yaffs_GutsInitialise() aborted.\n" TENDSTR)));
7682 yaffs_Deinitialise(dev);
7686 /* Zero out stats */
7687 dev->nPageReads = 0;
7688 dev->nPageWrites = 0;
7689 dev->nBlockErasures = 0;
7691 dev->nRetriedWrites = 0;
7693 dev->nRetiredBlocks = 0;
7695 yaffs_VerifyFreeChunks(dev);
7696 yaffs_VerifyBlocks(dev);
7698 /* Clean up any aborted checkpoint data */
7699 if(!dev->isCheckpointed && dev->blocksInCheckpoint > 0)
7700 yaffs_InvalidateCheckpoint(dev);
7702 T(YAFFS_TRACE_TRACING,
7703 (TSTR("yaffs: yaffs_GutsInitialise() done.\n" TENDSTR)));
7708 void yaffs_Deinitialise(yaffs_Device *dev)
7710 if (dev->isMounted) {
7713 yaffs_DeinitialiseBlocks(dev);
7714 yaffs_DeinitialiseTnodes(dev);
7715 yaffs_DeinitialiseObjects(dev);
7716 if (dev->nShortOpCaches > 0 &&
7719 for (i = 0; i < dev->nShortOpCaches; i++) {
7720 if (dev->srCache[i].data)
7721 YFREE(dev->srCache[i].data);
7722 dev->srCache[i].data = NULL;
7725 YFREE(dev->srCache);
7726 dev->srCache = NULL;
7729 YFREE(dev->gcCleanupList);
7731 for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++)
7732 YFREE(dev->tempBuffer[i].buffer);
7736 if (dev->deinitialiseNAND)
7737 dev->deinitialiseNAND(dev);
7741 static int yaffs_CountFreeChunks(yaffs_Device *dev)
7746 yaffs_BlockInfo *blk;
7748 for (nFree = 0, b = dev->internalStartBlock; b <= dev->internalEndBlock;
7750 blk = yaffs_GetBlockInfo(dev, b);
7752 switch (blk->blockState) {
7753 case YAFFS_BLOCK_STATE_EMPTY:
7754 case YAFFS_BLOCK_STATE_ALLOCATING:
7755 case YAFFS_BLOCK_STATE_COLLECTING:
7756 case YAFFS_BLOCK_STATE_FULL:
7758 (dev->nChunksPerBlock - blk->pagesInUse +
7759 blk->softDeletions);
7769 int yaffs_GetNumberOfFreeChunks(yaffs_Device *dev)
7771 /* This is what we report to the outside world */
7774 int nDirtyCacheChunks;
7775 int blocksForCheckpoint;
7779 nFree = dev->nFreeChunks;
7781 nFree = yaffs_CountFreeChunks(dev);
7784 nFree += dev->nDeletedFiles;
7786 /* Now count the number of dirty chunks in the cache and subtract those */
7788 for (nDirtyCacheChunks = 0, i = 0; i < dev->nShortOpCaches; i++) {
7789 if (dev->srCache[i].dirty)
7790 nDirtyCacheChunks++;
7793 nFree -= nDirtyCacheChunks;
7795 nFree -= ((dev->nReservedBlocks + 1) * dev->nChunksPerBlock);
7797 /* Now we figure out how much to reserve for the checkpoint and report that... */
7798 blocksForCheckpoint = yaffs_CalcCheckpointBlocksRequired(dev) - dev->blocksInCheckpoint;
7799 if (blocksForCheckpoint < 0)
7800 blocksForCheckpoint = 0;
7802 nFree -= (blocksForCheckpoint * dev->nChunksPerBlock);
7811 static int yaffs_freeVerificationFailures;
7813 static void yaffs_VerifyFreeChunks(yaffs_Device *dev)
7818 if (yaffs_SkipVerification(dev))
7821 counted = yaffs_CountFreeChunks(dev);
7823 difference = dev->nFreeChunks - counted;
7826 T(YAFFS_TRACE_ALWAYS,
7827 (TSTR("Freechunks verification failure %d %d %d" TENDSTR),
7828 dev->nFreeChunks, counted, difference));
7829 yaffs_freeVerificationFailures++;
7833 /*---------------------------------------- YAFFS test code ----------------------*/
7835 #define yaffs_CheckStruct(structure, syze, name) \
7837 if (sizeof(structure) != syze) { \
7838 T(YAFFS_TRACE_ALWAYS, (TSTR("%s should be %d but is %d\n" TENDSTR),\
7839 name, syze, (int) sizeof(structure))); \
7840 return YAFFS_FAIL; \
7844 static int yaffs_CheckStructures(void)
7846 /* yaffs_CheckStruct(yaffs_Tags,8,"yaffs_Tags"); */
7847 /* yaffs_CheckStruct(yaffs_TagsUnion,8,"yaffs_TagsUnion"); */
7848 /* yaffs_CheckStruct(yaffs_Spare,16,"yaffs_Spare"); */
7849 #ifndef CONFIG_YAFFS_TNODE_LIST_DEBUG
7850 /* yaffs_CheckStruct(yaffs_Tnode, 2 * YAFFS_NTNODES_LEVEL0, "yaffs_Tnode"); */
7852 #ifndef CONFIG_YAFFS_WINCE
7853 yaffs_CheckStruct(yaffs_ObjectHeader, 512, "yaffs_ObjectHeader");