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 1.113 2010-03-05 02:26:27 charles Exp $";
18 #include "yaffs_trace.h"
20 #include "yaffsinterface.h"
21 #include "yaffs_guts.h"
22 #include "yaffs_tagsvalidity.h"
23 #include "yaffs_getblockinfo.h"
25 #include "yaffs_tagscompat.h"
26 #ifndef CONFIG_YAFFS_USE_OWN_SORT
27 #include "yaffs_qsort.h"
29 #include "yaffs_nand.h"
31 #include "yaffs_checkptrw.h"
33 #include "yaffs_nand.h"
34 #include "yaffs_packedtags2.h"
37 #define YAFFS_PASSIVE_GC_CHUNKS 2
39 #include "yaffs_ecc.h"
42 /* Robustification (if it ever comes about...) */
43 static void yaffs_RetireBlock(yaffs_Device *dev, int blockInNAND);
44 static void yaffs_HandleWriteChunkError(yaffs_Device *dev, int chunkInNAND,
46 static void yaffs_HandleWriteChunkOk(yaffs_Device *dev, int chunkInNAND,
48 const yaffs_ExtendedTags *tags);
49 static void yaffs_HandleUpdateChunk(yaffs_Device *dev, int chunkInNAND,
50 const yaffs_ExtendedTags *tags);
52 /* Other local prototypes */
53 static void yaffs_UpdateParent(yaffs_Object *obj);
54 static int yaffs_UnlinkObject(yaffs_Object *obj);
55 static int yaffs_ObjectHasCachedWriteData(yaffs_Object *obj);
57 static void yaffs_HardlinkFixup(yaffs_Device *dev, yaffs_Object *hardList);
59 static int yaffs_WriteNewChunkWithTagsToNAND(yaffs_Device *dev,
61 yaffs_ExtendedTags *tags,
63 static int yaffs_PutChunkIntoFile(yaffs_Object *in, int chunkInInode,
64 int chunkInNAND, int inScan);
66 static yaffs_Object *yaffs_CreateNewObject(yaffs_Device *dev, int number,
67 yaffs_ObjectType type);
68 static void yaffs_AddObjectToDirectory(yaffs_Object *directory,
70 static int yaffs_UpdateObjectHeader(yaffs_Object *in, const YCHAR *name,
71 int force, int isShrink, int shadows);
72 static void yaffs_RemoveObjectFromDirectory(yaffs_Object *obj);
73 static int yaffs_CheckStructures(void);
74 static int yaffs_DeleteWorker(yaffs_Object *in, yaffs_Tnode *tn, __u32 level,
75 int chunkOffset, int *limit);
76 static int yaffs_DoGenericObjectDeletion(yaffs_Object *in);
78 static yaffs_BlockInfo *yaffs_GetBlockInfo(yaffs_Device *dev, int blockNo);
81 static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,
84 static int yaffs_UnlinkWorker(yaffs_Object *obj);
86 static int yaffs_TagsMatch(const yaffs_ExtendedTags *tags, int objectId,
89 static int yaffs_AllocateChunk(yaffs_Device *dev, int useReserve,
90 yaffs_BlockInfo **blockUsedPtr);
92 static void yaffs_VerifyFreeChunks(yaffs_Device *dev);
94 static void yaffs_CheckObjectDetailsLoaded(yaffs_Object *in);
96 static void yaffs_VerifyDirectory(yaffs_Object *directory);
98 static int yaffs_CheckFileSanity(yaffs_Object *in);
100 #define yaffs_CheckFileSanity(in)
103 static void yaffs_InvalidateWholeChunkCache(yaffs_Object *in);
104 static void yaffs_InvalidateChunkCache(yaffs_Object *object, int chunkId);
106 static void yaffs_InvalidateCheckpoint(yaffs_Device *dev);
108 static int yaffs_FindChunkInFile(yaffs_Object *in, int chunkInInode,
109 yaffs_ExtendedTags *tags);
111 static __u32 yaffs_GetChunkGroupBase(yaffs_Device *dev, yaffs_Tnode *tn,
113 static yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device *dev,
114 yaffs_FileStructure *fStruct,
117 static void yaffs_SkipRestOfBlock(yaffs_Device *dev);
118 static int yaffs_VerifyChunkWritten(yaffs_Device *dev,
121 yaffs_ExtendedTags *tags);
123 /* Function to calculate chunk and offset */
125 static void yaffs_AddrToChunk(yaffs_Device *dev, loff_t addr, int *chunkOut,
131 chunk = (__u32)(addr >> dev->chunkShift);
133 if (dev->chunkDiv == 1) {
134 /* easy power of 2 case */
135 offset = (__u32)(addr & dev->chunkMask);
137 /* Non power-of-2 case */
141 chunk /= dev->chunkDiv;
143 chunkBase = ((loff_t)chunk) * dev->nDataBytesPerChunk;
144 offset = (__u32)(addr - chunkBase);
151 /* Function to return the number of shifts for a power of 2 greater than or
152 * equal to the given number
153 * Note we don't try to cater for all possible numbers and this does not have to
154 * be hellishly efficient.
157 static __u32 ShiftsGE(__u32 x)
162 nShifts = extraBits = 0;
177 /* Function to return the number of shifts to get a 1 in bit 0
180 static __u32 Shifts(__u32 x)
200 * Temporary buffer manipulations.
203 static int yaffs_InitialiseTempBuffers(yaffs_Device *dev)
206 __u8 *buf = (__u8 *)1;
208 memset(dev->tempBuffer, 0, sizeof(dev->tempBuffer));
210 for (i = 0; buf && i < YAFFS_N_TEMP_BUFFERS; i++) {
211 dev->tempBuffer[i].line = 0; /* not in use */
212 dev->tempBuffer[i].buffer = buf =
213 YMALLOC_DMA(dev->param.totalBytesPerChunk);
216 return buf ? YAFFS_OK : YAFFS_FAIL;
219 __u8 *yaffs_GetTempBuffer(yaffs_Device *dev, int lineNo)
224 if (dev->tempInUse > dev->maxTemp)
225 dev->maxTemp = dev->tempInUse;
227 for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) {
228 if (dev->tempBuffer[i].line == 0) {
229 dev->tempBuffer[i].line = lineNo;
230 if ((i + 1) > dev->maxTemp) {
231 dev->maxTemp = i + 1;
232 for (j = 0; j <= i; j++)
233 dev->tempBuffer[j].maxLine =
234 dev->tempBuffer[j].line;
237 return dev->tempBuffer[i].buffer;
241 T(YAFFS_TRACE_BUFFERS,
242 (TSTR("Out of temp buffers at line %d, other held by lines:"),
244 for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++)
245 T(YAFFS_TRACE_BUFFERS, (TSTR(" %d "), dev->tempBuffer[i].line));
247 T(YAFFS_TRACE_BUFFERS, (TSTR(" " TENDSTR)));
250 * If we got here then we have to allocate an unmanaged one
254 dev->unmanagedTempAllocations++;
255 return YMALLOC(dev->nDataBytesPerChunk);
259 void yaffs_ReleaseTempBuffer(yaffs_Device *dev, __u8 *buffer,
266 for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) {
267 if (dev->tempBuffer[i].buffer == buffer) {
268 dev->tempBuffer[i].line = 0;
274 /* assume it is an unmanaged one. */
275 T(YAFFS_TRACE_BUFFERS,
276 (TSTR("Releasing unmanaged temp buffer in line %d" TENDSTR),
279 dev->unmanagedTempDeallocations++;
285 * Determine if we have a managed buffer.
287 int yaffs_IsManagedTempBuffer(yaffs_Device *dev, const __u8 *buffer)
291 for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) {
292 if (dev->tempBuffer[i].buffer == buffer)
296 for (i = 0; i < dev->param.nShortOpCaches; i++) {
297 if (dev->srCache[i].data == buffer)
301 if (buffer == dev->checkpointBuffer)
304 T(YAFFS_TRACE_ALWAYS,
305 (TSTR("yaffs: unmaged buffer detected.\n" TENDSTR)));
312 * Chunk bitmap manipulations
315 static Y_INLINE __u8 *yaffs_BlockBits(yaffs_Device *dev, int blk)
317 if (blk < dev->internalStartBlock || blk > dev->internalEndBlock) {
319 (TSTR("**>> yaffs: BlockBits block %d is not valid" TENDSTR),
323 return dev->chunkBits +
324 (dev->chunkBitmapStride * (blk - dev->internalStartBlock));
327 static Y_INLINE void yaffs_VerifyChunkBitId(yaffs_Device *dev, int blk, int chunk)
329 if (blk < dev->internalStartBlock || blk > dev->internalEndBlock ||
330 chunk < 0 || chunk >= dev->param.nChunksPerBlock) {
332 (TSTR("**>> yaffs: Chunk Id (%d:%d) invalid"TENDSTR),
338 static Y_INLINE void yaffs_ClearChunkBits(yaffs_Device *dev, int blk)
340 __u8 *blkBits = yaffs_BlockBits(dev, blk);
342 memset(blkBits, 0, dev->chunkBitmapStride);
345 static Y_INLINE void yaffs_ClearChunkBit(yaffs_Device *dev, int blk, int chunk)
347 __u8 *blkBits = yaffs_BlockBits(dev, blk);
349 yaffs_VerifyChunkBitId(dev, blk, chunk);
351 blkBits[chunk / 8] &= ~(1 << (chunk & 7));
354 static Y_INLINE void yaffs_SetChunkBit(yaffs_Device *dev, int blk, int chunk)
356 __u8 *blkBits = yaffs_BlockBits(dev, blk);
358 yaffs_VerifyChunkBitId(dev, blk, chunk);
360 blkBits[chunk / 8] |= (1 << (chunk & 7));
363 static Y_INLINE int yaffs_CheckChunkBit(yaffs_Device *dev, int blk, int chunk)
365 __u8 *blkBits = yaffs_BlockBits(dev, blk);
366 yaffs_VerifyChunkBitId(dev, blk, chunk);
368 return (blkBits[chunk / 8] & (1 << (chunk & 7))) ? 1 : 0;
371 static Y_INLINE int yaffs_StillSomeChunkBits(yaffs_Device *dev, int blk)
373 __u8 *blkBits = yaffs_BlockBits(dev, blk);
375 for (i = 0; i < dev->chunkBitmapStride; i++) {
383 static int yaffs_CountChunkBits(yaffs_Device *dev, int blk)
385 __u8 *blkBits = yaffs_BlockBits(dev, blk);
388 for (i = 0; i < dev->chunkBitmapStride; i++) {
405 static int yaffs_SkipVerification(yaffs_Device *dev)
408 return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY | YAFFS_TRACE_VERIFY_FULL));
411 static int yaffs_SkipFullVerification(yaffs_Device *dev)
414 return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY_FULL));
417 static int yaffs_SkipNANDVerification(yaffs_Device *dev)
420 return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY_NAND));
423 static const char *blockStateName[] = {
436 static void yaffs_VerifyBlock(yaffs_Device *dev, yaffs_BlockInfo *bi, int n)
441 if (yaffs_SkipVerification(dev))
444 /* Report illegal runtime states */
445 if (bi->blockState >= YAFFS_NUMBER_OF_BLOCK_STATES)
446 T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has undefined state %d"TENDSTR), n, bi->blockState));
448 switch (bi->blockState) {
449 case YAFFS_BLOCK_STATE_UNKNOWN:
450 case YAFFS_BLOCK_STATE_SCANNING:
451 case YAFFS_BLOCK_STATE_NEEDS_SCANNING:
452 T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has bad run-state %s"TENDSTR),
453 n, blockStateName[bi->blockState]));
456 /* Check pages in use and soft deletions are legal */
458 actuallyUsed = bi->pagesInUse - bi->softDeletions;
460 if (bi->pagesInUse < 0 || bi->pagesInUse > dev->param.nChunksPerBlock ||
461 bi->softDeletions < 0 || bi->softDeletions > dev->param.nChunksPerBlock ||
462 actuallyUsed < 0 || actuallyUsed > dev->param.nChunksPerBlock)
463 T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has illegal values pagesInUsed %d softDeletions %d"TENDSTR),
464 n, bi->pagesInUse, bi->softDeletions));
467 /* Check chunk bitmap legal */
468 inUse = yaffs_CountChunkBits(dev, n);
469 if (inUse != bi->pagesInUse)
470 T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has inconsistent values pagesInUse %d counted chunk bits %d"TENDSTR),
471 n, bi->pagesInUse, inUse));
473 /* Check that the sequence number is valid.
474 * Ten million is legal, but is very unlikely
476 if (dev->param.isYaffs2 &&
477 (bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING || bi->blockState == YAFFS_BLOCK_STATE_FULL) &&
478 (bi->sequenceNumber < YAFFS_LOWEST_SEQUENCE_NUMBER || bi->sequenceNumber > 10000000))
479 T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has suspect sequence number of %d"TENDSTR),
480 n, bi->sequenceNumber));
483 static void yaffs_VerifyCollectedBlock(yaffs_Device *dev, yaffs_BlockInfo *bi,
486 yaffs_VerifyBlock(dev, bi, n);
488 /* After collection the block should be in the erased state */
489 /* This will need to change if we do partial gc */
491 if (bi->blockState != YAFFS_BLOCK_STATE_COLLECTING &&
492 bi->blockState != YAFFS_BLOCK_STATE_EMPTY) {
493 T(YAFFS_TRACE_ERROR, (TSTR("Block %d is in state %d after gc, should be erased"TENDSTR),
498 static void yaffs_VerifyBlocks(yaffs_Device *dev)
501 int nBlocksPerState[YAFFS_NUMBER_OF_BLOCK_STATES];
502 int nIllegalBlockStates = 0;
504 if (yaffs_SkipVerification(dev))
507 memset(nBlocksPerState, 0, sizeof(nBlocksPerState));
509 for (i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) {
510 yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, i);
511 yaffs_VerifyBlock(dev, bi, i);
513 if (bi->blockState < YAFFS_NUMBER_OF_BLOCK_STATES)
514 nBlocksPerState[bi->blockState]++;
516 nIllegalBlockStates++;
519 T(YAFFS_TRACE_VERIFY, (TSTR(""TENDSTR)));
520 T(YAFFS_TRACE_VERIFY, (TSTR("Block summary"TENDSTR)));
522 T(YAFFS_TRACE_VERIFY, (TSTR("%d blocks have illegal states"TENDSTR), nIllegalBlockStates));
523 if (nBlocksPerState[YAFFS_BLOCK_STATE_ALLOCATING] > 1)
524 T(YAFFS_TRACE_VERIFY, (TSTR("Too many allocating blocks"TENDSTR)));
526 for (i = 0; i < YAFFS_NUMBER_OF_BLOCK_STATES; i++)
527 T(YAFFS_TRACE_VERIFY,
528 (TSTR("%s %d blocks"TENDSTR),
529 blockStateName[i], nBlocksPerState[i]));
531 if (dev->blocksInCheckpoint != nBlocksPerState[YAFFS_BLOCK_STATE_CHECKPOINT])
532 T(YAFFS_TRACE_VERIFY,
533 (TSTR("Checkpoint block count wrong dev %d count %d"TENDSTR),
534 dev->blocksInCheckpoint, nBlocksPerState[YAFFS_BLOCK_STATE_CHECKPOINT]));
536 if (dev->nErasedBlocks != nBlocksPerState[YAFFS_BLOCK_STATE_EMPTY])
537 T(YAFFS_TRACE_VERIFY,
538 (TSTR("Erased block count wrong dev %d count %d"TENDSTR),
539 dev->nErasedBlocks, nBlocksPerState[YAFFS_BLOCK_STATE_EMPTY]));
541 if (nBlocksPerState[YAFFS_BLOCK_STATE_COLLECTING] > 1)
542 T(YAFFS_TRACE_VERIFY,
543 (TSTR("Too many collecting blocks %d (max is 1)"TENDSTR),
544 nBlocksPerState[YAFFS_BLOCK_STATE_COLLECTING]));
546 T(YAFFS_TRACE_VERIFY, (TSTR(""TENDSTR)));
551 * Verify the object header. oh must be valid, but obj and tags may be NULL in which
552 * case those tests will not be performed.
554 static void yaffs_VerifyObjectHeader(yaffs_Object *obj, yaffs_ObjectHeader *oh, yaffs_ExtendedTags *tags, int parentCheck)
556 if (obj && yaffs_SkipVerification(obj->myDev))
559 if (!(tags && obj && oh)) {
560 T(YAFFS_TRACE_VERIFY,
561 (TSTR("Verifying object header tags %p obj %p oh %p"TENDSTR),
566 if (oh->type <= YAFFS_OBJECT_TYPE_UNKNOWN ||
567 oh->type > YAFFS_OBJECT_TYPE_MAX)
568 T(YAFFS_TRACE_VERIFY,
569 (TSTR("Obj %d header type is illegal value 0x%x"TENDSTR),
570 tags->objectId, oh->type));
572 if (tags->objectId != obj->objectId)
573 T(YAFFS_TRACE_VERIFY,
574 (TSTR("Obj %d header mismatch objectId %d"TENDSTR),
575 tags->objectId, obj->objectId));
579 * Check that the object's parent ids match if parentCheck requested.
581 * Tests do not apply to the root object.
584 if (parentCheck && tags->objectId > 1 && !obj->parent)
585 T(YAFFS_TRACE_VERIFY,
586 (TSTR("Obj %d header mismatch parentId %d obj->parent is NULL"TENDSTR),
587 tags->objectId, oh->parentObjectId));
589 if (parentCheck && obj->parent &&
590 oh->parentObjectId != obj->parent->objectId &&
591 (oh->parentObjectId != YAFFS_OBJECTID_UNLINKED ||
592 obj->parent->objectId != YAFFS_OBJECTID_DELETED))
593 T(YAFFS_TRACE_VERIFY,
594 (TSTR("Obj %d header mismatch parentId %d parentObjectId %d"TENDSTR),
595 tags->objectId, oh->parentObjectId, obj->parent->objectId));
597 if (tags->objectId > 1 && oh->name[0] == 0) /* Null name */
598 T(YAFFS_TRACE_VERIFY,
599 (TSTR("Obj %d header name is NULL"TENDSTR),
602 if (tags->objectId > 1 && ((__u8)(oh->name[0])) == 0xff) /* Trashed name */
603 T(YAFFS_TRACE_VERIFY,
604 (TSTR("Obj %d header name is 0xFF"TENDSTR),
610 static int yaffs_VerifyTnodeWorker(yaffs_Object *obj, yaffs_Tnode *tn,
611 __u32 level, int chunkOffset)
614 yaffs_Device *dev = obj->myDev;
620 for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++) {
621 if (tn->internal[i]) {
622 ok = yaffs_VerifyTnodeWorker(obj,
625 (chunkOffset<<YAFFS_TNODES_INTERNAL_BITS) + i);
628 } else if (level == 0) {
629 yaffs_ExtendedTags tags;
630 __u32 objectId = obj->objectId;
632 chunkOffset <<= YAFFS_TNODES_LEVEL0_BITS;
634 for (i = 0; i < YAFFS_NTNODES_LEVEL0; i++) {
635 __u32 theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
638 /* T(~0,(TSTR("verifying (%d:%d) %d"TENDSTR),tags.objectId,tags.chunkId,theChunk)); */
639 yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL, &tags);
640 if (tags.objectId != objectId || tags.chunkId != chunkOffset) {
641 T(~0, (TSTR("Object %d chunkId %d NAND mismatch chunk %d tags (%d:%d)"TENDSTR),
642 objectId, chunkOffset, theChunk,
643 tags.objectId, tags.chunkId));
656 static void yaffs_VerifyFile(yaffs_Object *obj)
658 int requiredTallness;
664 yaffs_ExtendedTags tags;
671 if (yaffs_SkipVerification(obj->myDev))
675 objectId = obj->objectId;
677 /* Check file size is consistent with tnode depth */
678 lastChunk = obj->variant.fileVariant.fileSize / dev->nDataBytesPerChunk + 1;
679 x = lastChunk >> YAFFS_TNODES_LEVEL0_BITS;
680 requiredTallness = 0;
682 x >>= YAFFS_TNODES_INTERNAL_BITS;
686 actualTallness = obj->variant.fileVariant.topLevel;
688 /* Check that the chunks in the tnode tree are all correct.
689 * We do this by scanning through the tnode tree and
690 * checking the tags for every chunk match.
693 if (yaffs_SkipNANDVerification(dev))
696 for (i = 1; i <= lastChunk; i++) {
697 tn = yaffs_FindLevel0Tnode(dev, &obj->variant.fileVariant, i);
700 __u32 theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
702 /* T(~0,(TSTR("verifying (%d:%d) %d"TENDSTR),objectId,i,theChunk)); */
703 yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL, &tags);
704 if (tags.objectId != objectId || tags.chunkId != i) {
705 T(~0, (TSTR("Object %d chunkId %d NAND mismatch chunk %d tags (%d:%d)"TENDSTR),
706 objectId, i, theChunk,
707 tags.objectId, tags.chunkId));
715 static void yaffs_VerifyHardLink(yaffs_Object *obj)
717 if (obj && yaffs_SkipVerification(obj->myDev))
720 /* Verify sane equivalent object */
723 static void yaffs_VerifySymlink(yaffs_Object *obj)
725 if (obj && yaffs_SkipVerification(obj->myDev))
728 /* Verify symlink string */
731 static void yaffs_VerifySpecial(yaffs_Object *obj)
733 if (obj && yaffs_SkipVerification(obj->myDev))
737 static void yaffs_VerifyObject(yaffs_Object *obj)
746 __u32 chunkShouldNotBeDeleted;
752 if (obj->beingCreated)
757 if (yaffs_SkipVerification(dev))
760 /* Check sane object header chunk */
762 chunkMin = dev->internalStartBlock * dev->param.nChunksPerBlock;
763 chunkMax = (dev->internalEndBlock+1) * dev->param.nChunksPerBlock - 1;
765 chunkInRange = (((unsigned)(obj->hdrChunk)) >= chunkMin && ((unsigned)(obj->hdrChunk)) <= chunkMax);
766 chunkIdOk = chunkInRange || (obj->hdrChunk == 0);
767 chunkValid = chunkInRange &&
768 yaffs_CheckChunkBit(dev,
769 obj->hdrChunk / dev->param.nChunksPerBlock,
770 obj->hdrChunk % dev->param.nChunksPerBlock);
771 chunkShouldNotBeDeleted = chunkInRange && !chunkValid;
774 (!chunkIdOk || chunkShouldNotBeDeleted)) {
775 T(YAFFS_TRACE_VERIFY,
776 (TSTR("Obj %d has chunkId %d %s %s"TENDSTR),
777 obj->objectId, obj->hdrChunk,
778 chunkIdOk ? "" : ",out of range",
779 chunkShouldNotBeDeleted ? ",marked as deleted" : ""));
782 if (chunkValid && !yaffs_SkipNANDVerification(dev)) {
783 yaffs_ExtendedTags tags;
784 yaffs_ObjectHeader *oh;
785 __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__);
787 oh = (yaffs_ObjectHeader *)buffer;
789 yaffs_ReadChunkWithTagsFromNAND(dev, obj->hdrChunk, buffer,
792 yaffs_VerifyObjectHeader(obj, oh, &tags, 1);
794 yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
797 /* Verify it has a parent */
798 if (obj && !obj->fake &&
799 (!obj->parent || obj->parent->myDev != dev)) {
800 T(YAFFS_TRACE_VERIFY,
801 (TSTR("Obj %d has parent pointer %p which does not look like an object"TENDSTR),
802 obj->objectId, obj->parent));
805 /* Verify parent is a directory */
806 if (obj->parent && obj->parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
807 T(YAFFS_TRACE_VERIFY,
808 (TSTR("Obj %d's parent is not a directory (type %d)"TENDSTR),
809 obj->objectId, obj->parent->variantType));
812 switch (obj->variantType) {
813 case YAFFS_OBJECT_TYPE_FILE:
814 yaffs_VerifyFile(obj);
816 case YAFFS_OBJECT_TYPE_SYMLINK:
817 yaffs_VerifySymlink(obj);
819 case YAFFS_OBJECT_TYPE_DIRECTORY:
820 yaffs_VerifyDirectory(obj);
822 case YAFFS_OBJECT_TYPE_HARDLINK:
823 yaffs_VerifyHardLink(obj);
825 case YAFFS_OBJECT_TYPE_SPECIAL:
826 yaffs_VerifySpecial(obj);
828 case YAFFS_OBJECT_TYPE_UNKNOWN:
830 T(YAFFS_TRACE_VERIFY,
831 (TSTR("Obj %d has illegaltype %d"TENDSTR),
832 obj->objectId, obj->variantType));
837 static void yaffs_VerifyObjects(yaffs_Device *dev)
841 struct ylist_head *lh;
843 if (yaffs_SkipVerification(dev))
846 /* Iterate through the objects in each hash entry */
848 for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
849 ylist_for_each(lh, &dev->objectBucket[i].list) {
851 obj = ylist_entry(lh, yaffs_Object, hashLink);
852 yaffs_VerifyObject(obj);
860 * Simple hash function. Needs to have a reasonable spread
863 static Y_INLINE int yaffs_HashFunction(int n)
866 return n % YAFFS_NOBJECT_BUCKETS;
870 * Access functions to useful fake objects.
871 * Note that root might have a presence in NAND if permissions are set.
874 yaffs_Object *yaffs_Root(yaffs_Device *dev)
879 yaffs_Object *yaffs_LostNFound(yaffs_Device *dev)
881 return dev->lostNFoundDir;
886 * Erased NAND checking functions
889 int yaffs_CheckFF(__u8 *buffer, int nBytes)
891 /* Horrible, slow implementation */
900 static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,
903 int retval = YAFFS_OK;
904 __u8 *data = yaffs_GetTempBuffer(dev, __LINE__);
905 yaffs_ExtendedTags tags;
908 result = yaffs_ReadChunkWithTagsFromNAND(dev, chunkInNAND, data, &tags);
910 if (tags.eccResult > YAFFS_ECC_RESULT_NO_ERROR)
913 if (!yaffs_CheckFF(data, dev->nDataBytesPerChunk) || tags.chunkUsed) {
914 T(YAFFS_TRACE_NANDACCESS,
915 (TSTR("Chunk %d not erased" TENDSTR), chunkInNAND));
919 yaffs_ReleaseTempBuffer(dev, data, __LINE__);
926 static int yaffs_VerifyChunkWritten(yaffs_Device *dev,
929 yaffs_ExtendedTags *tags)
931 int retval = YAFFS_OK;
932 yaffs_ExtendedTags tempTags;
933 __u8 *buffer = yaffs_GetTempBuffer(dev,__LINE__);
936 result = yaffs_ReadChunkWithTagsFromNAND(dev,chunkInNAND,buffer,&tempTags);
937 if(memcmp(buffer,data,dev->nDataBytesPerChunk) ||
938 tempTags.objectId != tags->objectId ||
939 tempTags.chunkId != tags->chunkId ||
940 tempTags.byteCount != tags->byteCount)
943 yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
948 static int yaffs_WriteNewChunkWithTagsToNAND(struct yaffs_DeviceStruct *dev,
950 yaffs_ExtendedTags *tags,
957 yaffs_InvalidateCheckpoint(dev);
960 yaffs_BlockInfo *bi = 0;
963 chunk = yaffs_AllocateChunk(dev, useReserve, &bi);
969 /* First check this chunk is erased, if it needs
970 * checking. The checking policy (unless forced
971 * always on) is as follows:
973 * Check the first page we try to write in a block.
974 * If the check passes then we don't need to check any
975 * more. If the check fails, we check again...
976 * If the block has been erased, we don't need to check.
978 * However, if the block has been prioritised for gc,
979 * then we think there might be something odd about
980 * this block and stop using it.
982 * Rationale: We should only ever see chunks that have
983 * not been erased if there was a partially written
984 * chunk due to power loss. This checking policy should
985 * catch that case with very few checks and thus save a
986 * lot of checks that are most likely not needed.
989 * If an erase check fails or the write fails we skip the
993 /* let's give it a try */
996 #ifdef CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED
997 bi->skipErasedCheck = 0;
999 if (!bi->skipErasedCheck) {
1000 erasedOk = yaffs_CheckChunkErased(dev, chunk);
1001 if (erasedOk != YAFFS_OK) {
1002 T(YAFFS_TRACE_ERROR,
1003 (TSTR("**>> yaffs chunk %d was not erased"
1006 /* If not erased, delete this one,
1007 * skip rest of block and
1008 * try another chunk */
1009 yaffs_DeleteChunk(dev,chunk,1,__LINE__);
1010 yaffs_SkipRestOfBlock(dev);
1015 writeOk = yaffs_WriteChunkWithTagsToNAND(dev, chunk,
1018 if(!bi->skipErasedCheck)
1019 writeOk = yaffs_VerifyChunkWritten(dev, chunk, data, tags);
1021 if (writeOk != YAFFS_OK) {
1022 /* Clean up aborted write, skip to next block and
1023 * try another chunk */
1024 yaffs_HandleWriteChunkError(dev, chunk, erasedOk);
1028 bi->skipErasedCheck = 1;
1030 /* Copy the data into the robustification buffer */
1031 yaffs_HandleWriteChunkOk(dev, chunk, data, tags);
1033 } while (writeOk != YAFFS_OK &&
1034 (yaffs_wr_attempts <= 0 || attempts <= yaffs_wr_attempts));
1040 T(YAFFS_TRACE_ERROR,
1041 (TSTR("**>> yaffs write required %d attempts" TENDSTR),
1044 dev->nRetriedWrites += (attempts - 1);
1051 * Block retiring for handling a broken block.
1054 static void yaffs_RetireBlock(yaffs_Device *dev, int blockInNAND)
1056 yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND);
1058 yaffs_InvalidateCheckpoint(dev);
1060 if (yaffs_MarkBlockBad(dev, blockInNAND) != YAFFS_OK) {
1061 if (yaffs_EraseBlockInNAND(dev, blockInNAND) != YAFFS_OK) {
1062 T(YAFFS_TRACE_ALWAYS, (TSTR(
1063 "yaffs: Failed to mark bad and erase block %d"
1064 TENDSTR), blockInNAND));
1066 yaffs_ExtendedTags tags;
1067 int chunkId = blockInNAND * dev->param.nChunksPerBlock;
1069 __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__);
1071 memset(buffer, 0xff, dev->nDataBytesPerChunk);
1072 yaffs_InitialiseTags(&tags);
1073 tags.sequenceNumber = YAFFS_SEQUENCE_BAD_BLOCK;
1074 if (dev->param.writeChunkWithTagsToNAND(dev, chunkId -
1075 dev->chunkOffset, buffer, &tags) != YAFFS_OK)
1076 T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Failed to "
1077 TCONT("write bad block marker to block %d")
1078 TENDSTR), blockInNAND));
1080 yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
1084 bi->blockState = YAFFS_BLOCK_STATE_DEAD;
1085 bi->gcPrioritise = 0;
1086 bi->needsRetiring = 0;
1088 dev->nRetiredBlocks++;
1092 * Functions for robustisizing TODO
1096 static void yaffs_HandleWriteChunkOk(yaffs_Device *dev, int chunkInNAND,
1098 const yaffs_ExtendedTags *tags)
1101 chunkInNAND=chunkInNAND;
1106 static void yaffs_HandleUpdateChunk(yaffs_Device *dev, int chunkInNAND,
1107 const yaffs_ExtendedTags *tags)
1110 chunkInNAND=chunkInNAND;
1114 void yaffs_HandleChunkError(yaffs_Device *dev, yaffs_BlockInfo *bi)
1116 if (!bi->gcPrioritise) {
1117 bi->gcPrioritise = 1;
1118 dev->hasPendingPrioritisedGCs = 1;
1119 bi->chunkErrorStrikes++;
1121 if (bi->chunkErrorStrikes > 3) {
1122 bi->needsRetiring = 1; /* Too many stikes, so retire this */
1123 T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Block struck out" TENDSTR)));
1129 static void yaffs_HandleWriteChunkError(yaffs_Device *dev, int chunkInNAND,
1132 int blockInNAND = chunkInNAND / dev->param.nChunksPerBlock;
1133 yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND);
1135 yaffs_HandleChunkError(dev, bi);
1138 /* Was an actual write failure, so mark the block for retirement */
1139 bi->needsRetiring = 1;
1140 T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
1141 (TSTR("**>> Block %d needs retiring" TENDSTR), blockInNAND));
1144 /* Delete the chunk */
1145 yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__);
1146 yaffs_SkipRestOfBlock(dev);
1150 /*---------------- Name handling functions ------------*/
1152 static __u16 yaffs_CalcNameSum(const YCHAR *name)
1157 const YUCHAR *bname = (const YUCHAR *) name;
1159 while ((*bname) && (i < (YAFFS_MAX_NAME_LENGTH/2))) {
1161 #ifdef CONFIG_YAFFS_CASE_INSENSITIVE
1162 sum += yaffs_toupper(*bname) * i;
1164 sum += (*bname) * i;
1173 static void yaffs_SetObjectName(yaffs_Object *obj, const YCHAR *name)
1175 #ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM
1176 memset(obj->shortName, 0, sizeof(YCHAR) * (YAFFS_SHORT_NAME_LENGTH+1));
1177 if (name && yaffs_strnlen(name,YAFFS_SHORT_NAME_LENGTH+1) <= YAFFS_SHORT_NAME_LENGTH)
1178 yaffs_strcpy(obj->shortName, name);
1180 obj->shortName[0] = _Y('\0');
1182 obj->sum = yaffs_CalcNameSum(name);
1185 /*-------------------- TNODES -------------------
1187 * List of spare tnodes
1188 * The list is hooked together using the first pointer
1192 /* yaffs_CreateTnodes creates a bunch more tnodes and
1193 * adds them to the tnode free list.
1194 * Don't use this function directly
1196 static Y_INLINE int yaffs_CalcTnodeSize(yaffs_Device *dev)
1199 /* Calculate the tnode size in bytes for variable width tnode support.
1200 * Must be a multiple of 32-bits */
1201 tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8;
1203 if (tnodeSize < sizeof(yaffs_Tnode))
1204 tnodeSize = sizeof(yaffs_Tnode);
1208 static int yaffs_CreateTnodes(yaffs_Device *dev, int nTnodes)
1211 int tnodeSize = yaffs_CalcTnodeSize(dev);
1212 yaffs_Tnode *newTnodes;
1216 yaffs_TnodeList *tnl;
1222 /* make these things */
1224 newTnodes = YMALLOC(nTnodes * tnodeSize);
1225 mem = (__u8 *)newTnodes;
1228 T(YAFFS_TRACE_ERROR,
1229 (TSTR("yaffs: Could not allocate Tnodes" TENDSTR)));
1233 /* Hook them into the free list */
1235 for (i = 0; i < nTnodes - 1; i++) {
1236 newTnodes[i].internal[0] = &newTnodes[i + 1];
1237 #ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
1238 newTnodes[i].internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
1242 newTnodes[nTnodes - 1].internal[0] = dev->freeTnodes;
1243 #ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
1244 newTnodes[nTnodes - 1].internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
1246 dev->freeTnodes = newTnodes;
1248 /* New hookup for wide tnodes */
1249 for (i = 0; i < nTnodes - 1; i++) {
1250 curr = (yaffs_Tnode *) &mem[i * tnodeSize];
1251 next = (yaffs_Tnode *) &mem[(i+1) * tnodeSize];
1252 curr->internal[0] = next;
1255 curr = (yaffs_Tnode *) &mem[(nTnodes - 1) * tnodeSize];
1256 curr->internal[0] = dev->freeTnodes;
1257 dev->freeTnodes = (yaffs_Tnode *)mem;
1262 dev->nFreeTnodes += nTnodes;
1263 dev->nTnodesCreated += nTnodes;
1265 /* Now add this bunch of tnodes to a list for freeing up.
1266 * NB If we can't add this to the management list it isn't fatal
1267 * but it just means we can't free this bunch of tnodes later.
1270 tnl = YMALLOC(sizeof(yaffs_TnodeList));
1272 T(YAFFS_TRACE_ERROR,
1274 ("yaffs: Could not add tnodes to management list" TENDSTR)));
1277 tnl->tnodes = newTnodes;
1278 tnl->next = dev->allocatedTnodeList;
1279 dev->allocatedTnodeList = tnl;
1282 T(YAFFS_TRACE_ALLOCATE, (TSTR("yaffs: Tnodes added" TENDSTR)));
1287 /* GetTnode gets us a clean tnode. Tries to make allocate more if we run out */
1289 static yaffs_Tnode *yaffs_GetTnodeRaw(yaffs_Device *dev)
1291 yaffs_Tnode *tn = NULL;
1293 #ifdef CONFIG_YAFFS_VALGRIND_TEST
1294 tn = YMALLOC(yaffs_CalcTnodeSize(dev));
1296 dev->nTnodesCreated++;
1298 /* If there are none left make more */
1299 if (!dev->freeTnodes)
1300 yaffs_CreateTnodes(dev, YAFFS_ALLOCATION_NTNODES);
1302 if (dev->freeTnodes) {
1303 tn = dev->freeTnodes;
1304 #ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
1305 if (tn->internal[YAFFS_NTNODES_INTERNAL] != (void *)1) {
1306 /* Hoosterman, this thing looks like it isn't in the list */
1307 T(YAFFS_TRACE_ALWAYS,
1308 (TSTR("yaffs: Tnode list bug 1" TENDSTR)));
1311 dev->freeTnodes = dev->freeTnodes->internal[0];
1315 dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
1320 static yaffs_Tnode *yaffs_GetTnode(yaffs_Device *dev)
1322 yaffs_Tnode *tn = yaffs_GetTnodeRaw(dev);
1323 int tnodeSize = yaffs_CalcTnodeSize(dev);
1326 memset(tn, 0, tnodeSize);
1331 /* FreeTnode frees up a tnode and puts it back on the free list */
1332 static void yaffs_FreeTnode(yaffs_Device *dev, yaffs_Tnode *tn)
1335 #ifdef CONFIG_YAFFS_VALGRIND_TEST
1337 dev->nTnodesCreated--;
1339 #ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
1340 if (tn->internal[YAFFS_NTNODES_INTERNAL] != 0) {
1341 /* Hoosterman, this thing looks like it is already in the list */
1342 T(YAFFS_TRACE_ALWAYS,
1343 (TSTR("yaffs: Tnode list bug 2" TENDSTR)));
1345 tn->internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
1347 tn->internal[0] = dev->freeTnodes;
1348 dev->freeTnodes = tn;
1352 dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
1355 static void yaffs_DeinitialiseTnodes(yaffs_Device *dev)
1357 /* Free the list of allocated tnodes */
1358 yaffs_TnodeList *tmp;
1360 while (dev->allocatedTnodeList) {
1361 tmp = dev->allocatedTnodeList->next;
1363 YFREE(dev->allocatedTnodeList->tnodes);
1364 YFREE(dev->allocatedTnodeList);
1365 dev->allocatedTnodeList = tmp;
1369 dev->freeTnodes = NULL;
1370 dev->nFreeTnodes = 0;
1371 dev->nTnodesCreated = 0;
1374 static void yaffs_InitialiseTnodes(yaffs_Device *dev)
1376 dev->allocatedTnodeList = NULL;
1377 dev->freeTnodes = NULL;
1378 dev->nFreeTnodes = 0;
1379 dev->nTnodesCreated = 0;
1383 void yaffs_LoadLevel0Tnode(yaffs_Device *dev, yaffs_Tnode *tn, unsigned pos,
1386 __u32 *map = (__u32 *)tn;
1392 pos &= YAFFS_TNODES_LEVEL0_MASK;
1393 val >>= dev->chunkGroupBits;
1395 bitInMap = pos * dev->tnodeWidth;
1396 wordInMap = bitInMap / 32;
1397 bitInWord = bitInMap & (32 - 1);
1399 mask = dev->tnodeMask << bitInWord;
1401 map[wordInMap] &= ~mask;
1402 map[wordInMap] |= (mask & (val << bitInWord));
1404 if (dev->tnodeWidth > (32 - bitInWord)) {
1405 bitInWord = (32 - bitInWord);
1407 mask = dev->tnodeMask >> (/*dev->tnodeWidth -*/ bitInWord);
1408 map[wordInMap] &= ~mask;
1409 map[wordInMap] |= (mask & (val >> bitInWord));
1413 static __u32 yaffs_GetChunkGroupBase(yaffs_Device *dev, yaffs_Tnode *tn,
1416 __u32 *map = (__u32 *)tn;
1422 pos &= YAFFS_TNODES_LEVEL0_MASK;
1424 bitInMap = pos * dev->tnodeWidth;
1425 wordInMap = bitInMap / 32;
1426 bitInWord = bitInMap & (32 - 1);
1428 val = map[wordInMap] >> bitInWord;
1430 if (dev->tnodeWidth > (32 - bitInWord)) {
1431 bitInWord = (32 - bitInWord);
1433 val |= (map[wordInMap] << bitInWord);
1436 val &= dev->tnodeMask;
1437 val <<= dev->chunkGroupBits;
1442 /* ------------------- End of individual tnode manipulation -----------------*/
1444 /* ---------Functions to manipulate the look-up tree (made up of tnodes) ------
1445 * The look up tree is represented by the top tnode and the number of topLevel
1446 * in the tree. 0 means only the level 0 tnode is in the tree.
1449 /* FindLevel0Tnode finds the level 0 tnode, if one exists. */
1450 static yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device *dev,
1451 yaffs_FileStructure *fStruct,
1454 yaffs_Tnode *tn = fStruct->top;
1456 int requiredTallness;
1457 int level = fStruct->topLevel;
1461 /* Check sane level and chunk Id */
1462 if (level < 0 || level > YAFFS_TNODES_MAX_LEVEL)
1465 if (chunkId > YAFFS_MAX_CHUNK_ID)
1468 /* First check we're tall enough (ie enough topLevel) */
1470 i = chunkId >> YAFFS_TNODES_LEVEL0_BITS;
1471 requiredTallness = 0;
1473 i >>= YAFFS_TNODES_INTERNAL_BITS;
1477 if (requiredTallness > fStruct->topLevel)
1478 return NULL; /* Not tall enough, so we can't find it */
1480 /* Traverse down to level 0 */
1481 while (level > 0 && tn) {
1482 tn = tn->internal[(chunkId >>
1483 (YAFFS_TNODES_LEVEL0_BITS +
1485 YAFFS_TNODES_INTERNAL_BITS)) &
1486 YAFFS_TNODES_INTERNAL_MASK];
1493 /* AddOrFindLevel0Tnode finds the level 0 tnode if it exists, otherwise first expands the tree.
1494 * This happens in two steps:
1495 * 1. If the tree isn't tall enough, then make it taller.
1496 * 2. Scan down the tree towards the level 0 tnode adding tnodes if required.
1498 * Used when modifying the tree.
1500 * If the tn argument is NULL, then a fresh tnode will be added otherwise the specified tn will
1501 * be plugged into the ttree.
1504 static yaffs_Tnode *yaffs_AddOrFindLevel0Tnode(yaffs_Device *dev,
1505 yaffs_FileStructure *fStruct,
1507 yaffs_Tnode *passedTn)
1509 int requiredTallness;
1517 /* Check sane level and page Id */
1518 if (fStruct->topLevel < 0 || fStruct->topLevel > YAFFS_TNODES_MAX_LEVEL)
1521 if (chunkId > YAFFS_MAX_CHUNK_ID)
1524 /* First check we're tall enough (ie enough topLevel) */
1526 x = chunkId >> YAFFS_TNODES_LEVEL0_BITS;
1527 requiredTallness = 0;
1529 x >>= YAFFS_TNODES_INTERNAL_BITS;
1534 if (requiredTallness > fStruct->topLevel) {
1535 /* Not tall enough, gotta make the tree taller */
1536 for (i = fStruct->topLevel; i < requiredTallness; i++) {
1538 tn = yaffs_GetTnode(dev);
1541 tn->internal[0] = fStruct->top;
1543 fStruct->topLevel++;
1545 T(YAFFS_TRACE_ERROR,
1546 (TSTR("yaffs: no more tnodes" TENDSTR)));
1552 /* Traverse down to level 0, adding anything we need */
1554 l = fStruct->topLevel;
1558 while (l > 0 && tn) {
1560 (YAFFS_TNODES_LEVEL0_BITS +
1561 (l - 1) * YAFFS_TNODES_INTERNAL_BITS)) &
1562 YAFFS_TNODES_INTERNAL_MASK;
1565 if ((l > 1) && !tn->internal[x]) {
1566 /* Add missing non-level-zero tnode */
1567 tn->internal[x] = yaffs_GetTnode(dev);
1568 if(!tn->internal[x])
1570 } else if (l == 1) {
1571 /* Looking from level 1 at level 0 */
1573 /* If we already have one, then release it.*/
1574 if (tn->internal[x])
1575 yaffs_FreeTnode(dev, tn->internal[x]);
1576 tn->internal[x] = passedTn;
1578 } else if (!tn->internal[x]) {
1579 /* Don't have one, none passed in */
1580 tn->internal[x] = yaffs_GetTnode(dev);
1581 if(!tn->internal[x])
1586 tn = tn->internal[x];
1590 /* top is level 0 */
1592 memcpy(tn, passedTn, (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8);
1593 yaffs_FreeTnode(dev, passedTn);
1600 static int yaffs_FindChunkInGroup(yaffs_Device *dev, int theChunk,
1601 yaffs_ExtendedTags *tags, int objectId,
1606 for (j = 0; theChunk && j < dev->chunkGroupSize; j++) {
1607 if (yaffs_CheckChunkBit(dev, theChunk / dev->param.nChunksPerBlock,
1608 theChunk % dev->param.nChunksPerBlock)) {
1610 if(dev->chunkGroupSize == 1)
1613 yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL,
1615 if (yaffs_TagsMatch(tags, objectId, chunkInInode)) {
1627 /* DeleteWorker scans backwards through the tnode tree and deletes all the
1628 * chunks and tnodes in the file
1629 * Returns 1 if the tree was deleted.
1630 * Returns 0 if it stopped early due to hitting the limit and the delete is incomplete.
1633 static int yaffs_DeleteWorker(yaffs_Object *in, yaffs_Tnode *tn, __u32 level,
1634 int chunkOffset, int *limit)
1639 yaffs_ExtendedTags tags;
1641 yaffs_Device *dev = in->myDev;
1647 for (i = YAFFS_NTNODES_INTERNAL - 1; allDone && i >= 0;
1649 if (tn->internal[i]) {
1650 if (limit && (*limit) < 0) {
1654 yaffs_DeleteWorker(in,
1662 YAFFS_TNODES_INTERNAL_BITS)
1667 yaffs_FreeTnode(dev,
1670 tn->internal[i] = NULL;
1674 return (allDone) ? 1 : 0;
1675 } else if (level == 0) {
1678 for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0 && !hitLimit;
1680 theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
1683 chunkInInode = (chunkOffset <<
1684 YAFFS_TNODES_LEVEL0_BITS) + i;
1687 yaffs_FindChunkInGroup(dev,
1693 if (foundChunk > 0) {
1694 yaffs_DeleteChunk(dev,
1699 *limit = *limit - 1;
1706 yaffs_LoadLevel0Tnode(dev, tn, i, 0);
1710 return (i < 0) ? 1 : 0;
1720 static void yaffs_SoftDeleteChunk(yaffs_Device *dev, int chunk)
1722 yaffs_BlockInfo *theBlock;
1724 T(YAFFS_TRACE_DELETION, (TSTR("soft delete chunk %d" TENDSTR), chunk));
1726 theBlock = yaffs_GetBlockInfo(dev, chunk / dev->param.nChunksPerBlock);
1728 theBlock->softDeletions++;
1733 /* SoftDeleteWorker scans backwards through the tnode tree and soft deletes all the chunks in the file.
1734 * All soft deleting does is increment the block's softdelete count and pulls the chunk out
1736 * Thus, essentially this is the same as DeleteWorker except that the chunks are soft deleted.
1739 static int yaffs_SoftDeleteWorker(yaffs_Object *in, yaffs_Tnode *tn,
1740 __u32 level, int chunkOffset)
1745 yaffs_Device *dev = in->myDev;
1750 for (i = YAFFS_NTNODES_INTERNAL - 1; allDone && i >= 0;
1752 if (tn->internal[i]) {
1754 yaffs_SoftDeleteWorker(in,
1760 YAFFS_TNODES_INTERNAL_BITS)
1763 yaffs_FreeTnode(dev,
1766 tn->internal[i] = NULL;
1768 /* Hoosterman... how could this happen? */
1772 return (allDone) ? 1 : 0;
1773 } else if (level == 0) {
1775 for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0; i--) {
1776 theChunk = yaffs_GetChunkGroupBase(dev, tn, i);
1778 /* Note this does not find the real chunk, only the chunk group.
1779 * We make an assumption that a chunk group is not larger than
1782 yaffs_SoftDeleteChunk(dev, theChunk);
1783 yaffs_LoadLevel0Tnode(dev, tn, i, 0);
1797 static void yaffs_SoftDeleteFile(yaffs_Object *obj)
1800 obj->variantType == YAFFS_OBJECT_TYPE_FILE && !obj->softDeleted) {
1801 if (obj->nDataChunks <= 0) {
1802 /* Empty file with no duplicate object headers, just delete it immediately */
1803 yaffs_FreeTnode(obj->myDev,
1804 obj->variant.fileVariant.top);
1805 obj->variant.fileVariant.top = NULL;
1806 T(YAFFS_TRACE_TRACING,
1807 (TSTR("yaffs: Deleting empty file %d" TENDSTR),
1809 yaffs_DoGenericObjectDeletion(obj);
1811 yaffs_SoftDeleteWorker(obj,
1812 obj->variant.fileVariant.top,
1813 obj->variant.fileVariant.
1815 obj->softDeleted = 1;
1820 /* Pruning removes any part of the file structure tree that is beyond the
1821 * bounds of the file (ie that does not point to chunks).
1823 * A file should only get pruned when its size is reduced.
1825 * Before pruning, the chunks must be pulled from the tree and the
1826 * level 0 tnode entries must be zeroed out.
1827 * Could also use this for file deletion, but that's probably better handled
1828 * by a special case.
1830 * This function is recursive. For levels > 0 the function is called again on
1831 * any sub-tree. For level == 0 we just check if the sub-tree has data.
1832 * If there is no data in a subtree then it is pruned.
1835 static yaffs_Tnode *yaffs_PruneWorker(yaffs_Device *dev, yaffs_Tnode *tn,
1836 __u32 level, int del0)
1845 for (i = 0; i < YAFFS_NTNODES_INTERNAL; i++) {
1846 if (tn->internal[i]) {
1848 yaffs_PruneWorker(dev, tn->internal[i],
1850 (i == 0) ? del0 : 1);
1853 if (tn->internal[i])
1857 int tnodeSize_u32 = yaffs_CalcTnodeSize(dev)/sizeof(__u32);
1858 __u32 *map = (__u32 *)tn;
1860 for(i = 0; !hasData && i < tnodeSize_u32; i++){
1866 if (hasData == 0 && del0) {
1867 /* Free and return NULL */
1869 yaffs_FreeTnode(dev, tn);
1879 static int yaffs_PruneFileStructure(yaffs_Device *dev,
1880 yaffs_FileStructure *fStruct)
1887 if (fStruct->topLevel > 0) {
1889 yaffs_PruneWorker(dev, fStruct->top, fStruct->topLevel, 0);
1891 /* Now we have a tree with all the non-zero branches NULL but the height
1892 * is the same as it was.
1893 * Let's see if we can trim internal tnodes to shorten the tree.
1894 * We can do this if only the 0th element in the tnode is in use
1895 * (ie all the non-zero are NULL)
1898 while (fStruct->topLevel && !done) {
1902 for (i = 1; i < YAFFS_NTNODES_INTERNAL; i++) {
1903 if (tn->internal[i])
1908 fStruct->top = tn->internal[0];
1909 fStruct->topLevel--;
1910 yaffs_FreeTnode(dev, tn);
1920 /*-------------------- End of File Structure functions.-------------------*/
1922 /* yaffs_CreateFreeObjects creates a bunch more objects and
1923 * adds them to the object free list.
1925 static int yaffs_CreateFreeObjects(yaffs_Device *dev, int nObjects)
1928 yaffs_Object *newObjects;
1929 yaffs_ObjectList *list;
1934 /* make these things */
1935 newObjects = YMALLOC(nObjects * sizeof(yaffs_Object));
1936 list = YMALLOC(sizeof(yaffs_ObjectList));
1938 if (!newObjects || !list) {
1947 T(YAFFS_TRACE_ALLOCATE,
1948 (TSTR("yaffs: Could not allocate more objects" TENDSTR)));
1952 /* Hook them into the free list */
1953 for (i = 0; i < nObjects - 1; i++) {
1954 newObjects[i].siblings.next =
1955 (struct ylist_head *)(&newObjects[i + 1]);
1958 newObjects[nObjects - 1].siblings.next = (void *)dev->freeObjects;
1959 dev->freeObjects = newObjects;
1960 dev->nFreeObjects += nObjects;
1961 dev->nObjectsCreated += nObjects;
1963 /* Now add this bunch of Objects to a list for freeing up. */
1965 list->objects = newObjects;
1966 list->next = dev->allocatedObjectList;
1967 dev->allocatedObjectList = list;
1973 /* AllocateEmptyObject gets us a clean Object. Tries to make allocate more if we run out */
1974 static yaffs_Object *yaffs_AllocateEmptyObject(yaffs_Device *dev)
1976 yaffs_Object *tn = NULL;
1978 #ifdef CONFIG_YAFFS_VALGRIND_TEST
1979 tn = YMALLOC(sizeof(yaffs_Object));
1981 dev->nObjectsCreated++;
1983 /* If there are none left make more */
1984 if (!dev->freeObjects)
1985 yaffs_CreateFreeObjects(dev, YAFFS_ALLOCATION_NOBJECTS);
1987 if (dev->freeObjects) {
1988 tn = dev->freeObjects;
1990 (yaffs_Object *) (dev->freeObjects->siblings.next);
1991 dev->nFreeObjects--;
1995 /* Now sweeten it up... */
1997 memset(tn, 0, sizeof(yaffs_Object));
1998 tn->beingCreated = 1;
2002 tn->variantType = YAFFS_OBJECT_TYPE_UNKNOWN;
2003 YINIT_LIST_HEAD(&(tn->hardLinks));
2004 YINIT_LIST_HEAD(&(tn->hashLink));
2005 YINIT_LIST_HEAD(&tn->siblings);
2008 /* Now make the directory sane */
2010 tn->parent = dev->rootDir;
2011 ylist_add(&(tn->siblings), &dev->rootDir->variant.directoryVariant.children);
2014 /* Add it to the lost and found directory.
2015 * NB Can't put root or lostNFound in lostNFound so
2016 * check if lostNFound exists first
2018 if (dev->lostNFoundDir)
2019 yaffs_AddObjectToDirectory(dev->lostNFoundDir, tn);
2021 tn->beingCreated = 0;
2024 dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
2029 static yaffs_Object *yaffs_CreateFakeDirectory(yaffs_Device *dev, int number,
2034 yaffs_CreateNewObject(dev, number, YAFFS_OBJECT_TYPE_DIRECTORY);
2036 obj->fake = 1; /* it is fake so it might have no NAND presence... */
2037 obj->renameAllowed = 0; /* ... and we're not allowed to rename it... */
2038 obj->unlinkAllowed = 0; /* ... or unlink it */
2041 obj->yst_mode = mode;
2043 obj->hdrChunk = 0; /* Not a valid chunk. */
2050 static void yaffs_UnhashObject(yaffs_Object *tn)
2053 yaffs_Device *dev = tn->myDev;
2055 /* If it is still linked into the bucket list, free from the list */
2056 if (!ylist_empty(&tn->hashLink)) {
2057 ylist_del_init(&tn->hashLink);
2058 bucket = yaffs_HashFunction(tn->objectId);
2059 dev->objectBucket[bucket].count--;
2063 /* FreeObject frees up a Object and puts it back on the free list */
2064 static void yaffs_FreeObject(yaffs_Object *tn)
2066 yaffs_Device *dev = tn->myDev;
2068 T(YAFFS_TRACE_OS, (TSTR("FreeObject %p inode %p"TENDSTR), tn, tn->myInode));
2074 if (!ylist_empty(&tn->siblings))
2079 /* We're still hooked up to a cached inode.
2080 * Don't delete now, but mark for later deletion
2082 tn->deferedFree = 1;
2086 yaffs_UnhashObject(tn);
2088 #ifdef CONFIG_YAFFS_VALGRIND_TEST
2090 dev->nObjectsCreated--;
2093 /* Link into the free list. */
2094 tn->siblings.next = (struct ylist_head *)(dev->freeObjects);
2095 dev->freeObjects = tn;
2096 dev->nFreeObjects++;
2098 dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
2102 void yaffs_HandleDeferedFree(yaffs_Object *obj)
2104 if (obj->deferedFree)
2105 yaffs_FreeObject(obj);
2109 static void yaffs_DeinitialiseObjects(yaffs_Device *dev)
2111 /* Free the list of allocated Objects */
2113 yaffs_ObjectList *tmp;
2115 while (dev->allocatedObjectList) {
2116 tmp = dev->allocatedObjectList->next;
2117 YFREE(dev->allocatedObjectList->objects);
2118 YFREE(dev->allocatedObjectList);
2120 dev->allocatedObjectList = tmp;
2123 dev->freeObjects = NULL;
2124 dev->nFreeObjects = 0;
2125 dev->nObjectsCreated = 0;
2128 static void yaffs_InitialiseObjects(yaffs_Device *dev)
2132 dev->allocatedObjectList = NULL;
2133 dev->freeObjects = NULL;
2134 dev->nFreeObjects = 0;
2136 for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
2137 YINIT_LIST_HEAD(&dev->objectBucket[i].list);
2138 dev->objectBucket[i].count = 0;
2142 static int yaffs_FindNiceObjectBucket(yaffs_Device *dev)
2146 int lowest = 999999;
2149 /* Search for the shortest list or one that
2153 for (i = 0; i < 10 && lowest > 4; i++) {
2154 dev->bucketFinder++;
2155 dev->bucketFinder %= YAFFS_NOBJECT_BUCKETS;
2156 if (dev->objectBucket[dev->bucketFinder].count < lowest) {
2157 lowest = dev->objectBucket[dev->bucketFinder].count;
2158 l = dev->bucketFinder;
2166 static int yaffs_CreateNewObjectNumber(yaffs_Device *dev)
2168 int bucket = yaffs_FindNiceObjectBucket(dev);
2170 /* Now find an object value that has not already been taken
2171 * by scanning the list.
2175 struct ylist_head *i;
2177 __u32 n = (__u32) bucket;
2179 /* yaffs_CheckObjectHashSanity(); */
2183 n += YAFFS_NOBJECT_BUCKETS;
2184 if (1 || dev->objectBucket[bucket].count > 0) {
2185 ylist_for_each(i, &dev->objectBucket[bucket].list) {
2186 /* If there is already one in the list */
2187 if (i && ylist_entry(i, yaffs_Object,
2188 hashLink)->objectId == n) {
2198 static void yaffs_HashObject(yaffs_Object *in)
2200 int bucket = yaffs_HashFunction(in->objectId);
2201 yaffs_Device *dev = in->myDev;
2203 ylist_add(&in->hashLink, &dev->objectBucket[bucket].list);
2204 dev->objectBucket[bucket].count++;
2207 yaffs_Object *yaffs_FindObjectByNumber(yaffs_Device *dev, __u32 number)
2209 int bucket = yaffs_HashFunction(number);
2210 struct ylist_head *i;
2213 ylist_for_each(i, &dev->objectBucket[bucket].list) {
2214 /* Look if it is in the list */
2216 in = ylist_entry(i, yaffs_Object, hashLink);
2217 if (in->objectId == number) {
2219 /* Don't tell the VFS about this one if it is defered free */
2220 if (in->deferedFree)
2231 yaffs_Object *yaffs_CreateNewObject(yaffs_Device *dev, int number,
2232 yaffs_ObjectType type)
2234 yaffs_Object *theObject=NULL;
2235 yaffs_Tnode *tn = NULL;
2238 number = yaffs_CreateNewObjectNumber(dev);
2240 if (type == YAFFS_OBJECT_TYPE_FILE) {
2241 tn = yaffs_GetTnode(dev);
2246 theObject = yaffs_AllocateEmptyObject(dev);
2249 yaffs_FreeTnode(dev,tn);
2255 theObject->fake = 0;
2256 theObject->renameAllowed = 1;
2257 theObject->unlinkAllowed = 1;
2258 theObject->objectId = number;
2259 yaffs_HashObject(theObject);
2260 theObject->variantType = type;
2261 #ifdef CONFIG_YAFFS_WINCE
2262 yfsd_WinFileTimeNow(theObject->win_atime);
2263 theObject->win_ctime[0] = theObject->win_mtime[0] =
2264 theObject->win_atime[0];
2265 theObject->win_ctime[1] = theObject->win_mtime[1] =
2266 theObject->win_atime[1];
2270 theObject->yst_atime = theObject->yst_mtime =
2271 theObject->yst_ctime = Y_CURRENT_TIME;
2274 case YAFFS_OBJECT_TYPE_FILE:
2275 theObject->variant.fileVariant.fileSize = 0;
2276 theObject->variant.fileVariant.scannedFileSize = 0;
2277 theObject->variant.fileVariant.shrinkSize = 0xFFFFFFFF; /* max __u32 */
2278 theObject->variant.fileVariant.topLevel = 0;
2279 theObject->variant.fileVariant.top = tn;
2281 case YAFFS_OBJECT_TYPE_DIRECTORY:
2282 YINIT_LIST_HEAD(&theObject->variant.directoryVariant.
2285 case YAFFS_OBJECT_TYPE_SYMLINK:
2286 case YAFFS_OBJECT_TYPE_HARDLINK:
2287 case YAFFS_OBJECT_TYPE_SPECIAL:
2288 /* No action required */
2290 case YAFFS_OBJECT_TYPE_UNKNOWN:
2291 /* todo this should not happen */
2299 static yaffs_Object *yaffs_FindOrCreateObjectByNumber(yaffs_Device *dev,
2301 yaffs_ObjectType type)
2303 yaffs_Object *theObject = NULL;
2306 theObject = yaffs_FindObjectByNumber(dev, number);
2309 theObject = yaffs_CreateNewObject(dev, number, type);
2316 static YCHAR *yaffs_CloneString(const YCHAR *str)
2318 YCHAR *newStr = NULL;
2324 len = yaffs_strnlen(str,YAFFS_MAX_ALIAS_LENGTH);
2325 newStr = YMALLOC((len + 1) * sizeof(YCHAR));
2327 yaffs_strncpy(newStr, str,len);
2335 * Mknod (create) a new object.
2336 * equivalentObject only has meaning for a hard link;
2337 * aliasString only has meaning for a symlink.
2338 * rdev only has meaning for devices (a subset of special objects)
2341 static yaffs_Object *yaffs_MknodObject(yaffs_ObjectType type,
2342 yaffs_Object *parent,
2347 yaffs_Object *equivalentObject,
2348 const YCHAR *aliasString, __u32 rdev)
2353 yaffs_Device *dev = parent->myDev;
2355 /* Check if the entry exists. If it does then fail the call since we don't want a dup.*/
2356 if (yaffs_FindObjectByName(parent, name))
2359 if (type == YAFFS_OBJECT_TYPE_SYMLINK) {
2360 str = yaffs_CloneString(aliasString);
2365 in = yaffs_CreateNewObject(dev, -1, type);
2380 in->variantType = type;
2382 in->yst_mode = mode;
2384 #ifdef CONFIG_YAFFS_WINCE
2385 yfsd_WinFileTimeNow(in->win_atime);
2386 in->win_ctime[0] = in->win_mtime[0] = in->win_atime[0];
2387 in->win_ctime[1] = in->win_mtime[1] = in->win_atime[1];
2390 in->yst_atime = in->yst_mtime = in->yst_ctime = Y_CURRENT_TIME;
2392 in->yst_rdev = rdev;
2396 in->nDataChunks = 0;
2398 yaffs_SetObjectName(in, name);
2401 yaffs_AddObjectToDirectory(parent, in);
2403 in->myDev = parent->myDev;
2406 case YAFFS_OBJECT_TYPE_SYMLINK:
2407 in->variant.symLinkVariant.alias = str;
2409 case YAFFS_OBJECT_TYPE_HARDLINK:
2410 in->variant.hardLinkVariant.equivalentObject =
2412 in->variant.hardLinkVariant.equivalentObjectId =
2413 equivalentObject->objectId;
2414 ylist_add(&in->hardLinks, &equivalentObject->hardLinks);
2416 case YAFFS_OBJECT_TYPE_FILE:
2417 case YAFFS_OBJECT_TYPE_DIRECTORY:
2418 case YAFFS_OBJECT_TYPE_SPECIAL:
2419 case YAFFS_OBJECT_TYPE_UNKNOWN:
2424 if (yaffs_UpdateObjectHeader(in, name, 0, 0, 0) < 0) {
2425 /* Could not create the object header, fail the creation */
2426 yaffs_DeleteObject(in);
2430 yaffs_UpdateParent(parent);
2436 yaffs_Object *yaffs_MknodFile(yaffs_Object *parent, const YCHAR *name,
2437 __u32 mode, __u32 uid, __u32 gid)
2439 return yaffs_MknodObject(YAFFS_OBJECT_TYPE_FILE, parent, name, mode,
2440 uid, gid, NULL, NULL, 0);
2443 yaffs_Object *yaffs_MknodDirectory(yaffs_Object *parent, const YCHAR *name,
2444 __u32 mode, __u32 uid, __u32 gid)
2446 return yaffs_MknodObject(YAFFS_OBJECT_TYPE_DIRECTORY, parent, name,
2447 mode, uid, gid, NULL, NULL, 0);
2450 yaffs_Object *yaffs_MknodSpecial(yaffs_Object *parent, const YCHAR *name,
2451 __u32 mode, __u32 uid, __u32 gid, __u32 rdev)
2453 return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SPECIAL, parent, name, mode,
2454 uid, gid, NULL, NULL, rdev);
2457 yaffs_Object *yaffs_MknodSymLink(yaffs_Object *parent, const YCHAR *name,
2458 __u32 mode, __u32 uid, __u32 gid,
2461 return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SYMLINK, parent, name, mode,
2462 uid, gid, NULL, alias, 0);
2465 /* yaffs_Link returns the object id of the equivalent object.*/
2466 yaffs_Object *yaffs_Link(yaffs_Object *parent, const YCHAR *name,
2467 yaffs_Object *equivalentObject)
2469 /* Get the real object in case we were fed a hard link as an equivalent object */
2470 equivalentObject = yaffs_GetEquivalentObject(equivalentObject);
2472 if (yaffs_MknodObject
2473 (YAFFS_OBJECT_TYPE_HARDLINK, parent, name, 0, 0, 0,
2474 equivalentObject, NULL, 0)) {
2475 return equivalentObject;
2482 static int yaffs_ChangeObjectName(yaffs_Object *obj, yaffs_Object *newDir,
2483 const YCHAR *newName, int force, int shadows)
2488 yaffs_Object *existingTarget;
2491 newDir = obj->parent; /* use the old directory */
2493 if (newDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
2494 T(YAFFS_TRACE_ALWAYS,
2496 ("tragedy: yaffs_ChangeObjectName: newDir is not a directory"
2501 /* TODO: Do we need this different handling for YAFFS2 and YAFFS1?? */
2502 if (obj->myDev->param.isYaffs2)
2503 unlinkOp = (newDir == obj->myDev->unlinkedDir);
2505 unlinkOp = (newDir == obj->myDev->unlinkedDir
2506 && obj->variantType == YAFFS_OBJECT_TYPE_FILE);
2508 deleteOp = (newDir == obj->myDev->deletedDir);
2510 existingTarget = yaffs_FindObjectByName(newDir, newName);
2512 /* If the object is a file going into the unlinked directory,
2513 * then it is OK to just stuff it in since duplicate names are allowed.
2514 * else only proceed if the new name does not exist and if we're putting
2515 * it into a directory.
2522 newDir->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) {
2523 yaffs_SetObjectName(obj, newName);
2526 yaffs_AddObjectToDirectory(newDir, obj);
2531 /* If it is a deletion then we mark it as a shrink for gc purposes. */
2532 if (yaffs_UpdateObjectHeader(obj, newName, 0, deleteOp, shadows) >= 0)
2539 int yaffs_RenameObject(yaffs_Object *oldDir, const YCHAR *oldName,
2540 yaffs_Object *newDir, const YCHAR *newName)
2542 yaffs_Object *obj = NULL;
2543 yaffs_Object *existingTarget = NULL;
2549 if (!oldDir || oldDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
2551 if (!newDir || newDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
2554 dev = oldDir->myDev;
2556 #ifdef CONFIG_YAFFS_CASE_INSENSITIVE
2557 /* Special case for case insemsitive systems (eg. WinCE).
2558 * While look-up is case insensitive, the name isn't.
2559 * Therefore we might want to change x.txt to X.txt
2561 if (oldDir == newDir && yaffs_strcmp(oldName, newName) == 0)
2565 if(yaffs_strnlen(newName,YAFFS_MAX_NAME_LENGTH+1) > YAFFS_MAX_NAME_LENGTH)
2569 obj = yaffs_FindObjectByName(oldDir, oldName);
2571 if (obj && obj->renameAllowed) {
2573 /* Now do the handling for an existing target, if there is one */
2575 existingTarget = yaffs_FindObjectByName(newDir, newName);
2576 if (existingTarget &&
2577 existingTarget->variantType == YAFFS_OBJECT_TYPE_DIRECTORY &&
2578 !ylist_empty(&existingTarget->variant.directoryVariant.children)) {
2579 /* There is a target that is a non-empty directory, so we fail */
2580 return YAFFS_FAIL; /* EEXIST or ENOTEMPTY */
2581 } else if (existingTarget && existingTarget != obj) {
2582 /* Nuke the target first, using shadowing,
2583 * but only if it isn't the same object.
2585 * Note we must disable gc otherwise it can mess up the shadowing.
2589 yaffs_ChangeObjectName(obj, newDir, newName, force,
2590 existingTarget->objectId);
2591 existingTarget->isShadowed = 1;
2592 yaffs_UnlinkObject(existingTarget);
2596 result = yaffs_ChangeObjectName(obj, newDir, newName, 1, 0);
2598 yaffs_UpdateParent(oldDir);
2599 if(newDir != oldDir)
2600 yaffs_UpdateParent(newDir);
2607 /*------------------------- Block Management and Page Allocation ----------------*/
2609 static int yaffs_InitialiseBlocks(yaffs_Device *dev)
2611 int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1;
2613 dev->blockInfo = NULL;
2614 dev->chunkBits = NULL;
2616 dev->allocationBlock = -1; /* force it to get a new one */
2618 /* If the first allocation strategy fails, thry the alternate one */
2619 dev->blockInfo = YMALLOC(nBlocks * sizeof(yaffs_BlockInfo));
2620 if (!dev->blockInfo) {
2621 dev->blockInfo = YMALLOC_ALT(nBlocks * sizeof(yaffs_BlockInfo));
2622 dev->blockInfoAlt = 1;
2624 dev->blockInfoAlt = 0;
2626 if (dev->blockInfo) {
2627 /* Set up dynamic blockinfo stuff. */
2628 dev->chunkBitmapStride = (dev->param.nChunksPerBlock + 7) / 8; /* round up bytes */
2629 dev->chunkBits = YMALLOC(dev->chunkBitmapStride * nBlocks);
2630 if (!dev->chunkBits) {
2631 dev->chunkBits = YMALLOC_ALT(dev->chunkBitmapStride * nBlocks);
2632 dev->chunkBitsAlt = 1;
2634 dev->chunkBitsAlt = 0;
2637 if (dev->blockInfo && dev->chunkBits) {
2638 memset(dev->blockInfo, 0, nBlocks * sizeof(yaffs_BlockInfo));
2639 memset(dev->chunkBits, 0, dev->chunkBitmapStride * nBlocks);
2646 static void yaffs_DeinitialiseBlocks(yaffs_Device *dev)
2648 if (dev->blockInfoAlt && dev->blockInfo)
2649 YFREE_ALT(dev->blockInfo);
2650 else if (dev->blockInfo)
2651 YFREE(dev->blockInfo);
2653 dev->blockInfoAlt = 0;
2655 dev->blockInfo = NULL;
2657 if (dev->chunkBitsAlt && dev->chunkBits)
2658 YFREE_ALT(dev->chunkBits);
2659 else if (dev->chunkBits)
2660 YFREE(dev->chunkBits);
2661 dev->chunkBitsAlt = 0;
2662 dev->chunkBits = NULL;
2665 static int yaffs_BlockNotDisqualifiedFromGC(yaffs_Device *dev,
2666 yaffs_BlockInfo *bi)
2672 if (!dev->param.isYaffs2)
2673 return 1; /* disqualification only applies to yaffs2. */
2675 if (!bi->hasShrinkHeader)
2676 return 1; /* can gc */
2678 /* Find the oldest dirty sequence number if we don't know it and save it
2679 * so we don't have to keep recomputing it.
2681 if (!dev->oldestDirtySequence) {
2682 seq = dev->sequenceNumber;
2684 for (i = dev->internalStartBlock; i <= dev->internalEndBlock;
2686 b = yaffs_GetBlockInfo(dev, i);
2687 if (b->blockState == YAFFS_BLOCK_STATE_FULL &&
2688 (b->pagesInUse - b->softDeletions) <
2689 dev->param.nChunksPerBlock && b->sequenceNumber < seq) {
2690 seq = b->sequenceNumber;
2693 dev->oldestDirtySequence = seq;
2696 /* Can't do gc of this block if there are any blocks older than this one that have
2699 return (bi->sequenceNumber <= dev->oldestDirtySequence);
2703 * yaffs_FindRefreshBlock()
2704 * periodically finds the oldest full block by sequence number for refreshing.
2707 static __u32 yaffs_FindRefreshBlock(yaffs_Device *dev)
2712 __u32 oldestSequence = 0;
2714 yaffs_BlockInfo *bi;
2717 * If refresh period < 10 then refreshing is disabled.
2719 if(dev->param.refreshPeriod < 10 ||
2720 !dev->param.isYaffs2)
2724 * Fix broken values.
2726 if(dev->refreshSkip > dev->param.refreshPeriod)
2727 dev->refreshSkip = dev->param.refreshPeriod;
2729 if(dev->refreshSkip > 0){
2735 * Refresh skip is now zero.
2736 * We'll do a refresh this time around....
2737 * Update the refresh skip and find the oldest block.
2739 dev->refreshSkip = dev->param.refreshPeriod;
2740 dev->refreshCount++;
2742 for (b = dev->internalStartBlock; b <=dev->internalEndBlock; b++){
2744 bi = yaffs_GetBlockInfo(dev, b);
2747 if (bi->blockState == YAFFS_BLOCK_STATE_FULL){
2750 bi->sequenceNumber < oldestSequence){
2752 oldestSequence = bi->sequenceNumber;
2759 (TSTR("GC refresh count %d selected block %d with sequenceNumber %d" TENDSTR),
2760 dev->refreshCount, oldest, oldestSequence));
2767 * FindDiretiestBlock is used to select the dirtiest block (or close enough)
2768 * for garbage collection.
2771 static int yaffs_FindBlockForGarbageCollection(yaffs_Device *dev,
2774 int b = dev->currentDirtyChecker;
2780 int prioritised = 0;
2781 yaffs_BlockInfo *bi;
2782 int pendingPrioritisedExist = 0;
2784 /* First let's see if we need to grab a prioritised block */
2785 if (dev->hasPendingPrioritisedGCs) {
2786 for (i = dev->internalStartBlock; i < dev->internalEndBlock && !prioritised; i++) {
2788 bi = yaffs_GetBlockInfo(dev, i);
2789 /* yaffs_VerifyBlock(dev,bi,i); */
2791 if (bi->gcPrioritise) {
2792 pendingPrioritisedExist = 1;
2793 if (bi->blockState == YAFFS_BLOCK_STATE_FULL &&
2794 yaffs_BlockNotDisqualifiedFromGC(dev, bi)) {
2795 pagesInUse = (bi->pagesInUse - bi->softDeletions);
2798 aggressive = 1; /* Fool the non-aggressive skip logiv below */
2803 if (!pendingPrioritisedExist) /* None found, so we can clear this */
2804 dev->hasPendingPrioritisedGCs = 0;
2807 /* If we're doing aggressive GC then we are happy to take a less-dirty block, and
2809 * else (we're doing a leasurely gc), then we only bother to do this if the
2810 * block has only a few pages in use.
2813 dev->nonAggressiveSkip--;
2815 if (!aggressive && (dev->nonAggressiveSkip > 0))
2820 (aggressive) ? dev->param.nChunksPerBlock : YAFFS_PASSIVE_GC_CHUNKS + 1;
2824 dev->internalEndBlock - dev->internalStartBlock + 1;
2827 dev->internalEndBlock - dev->internalStartBlock + 1;
2828 iterations = iterations / 16;
2829 if (iterations > 200)
2833 for (i = 0; i <= iterations && pagesInUse > 0 && !prioritised; i++) {
2835 if (b < dev->internalStartBlock || b > dev->internalEndBlock)
2836 b = dev->internalStartBlock;
2838 if (b < dev->internalStartBlock || b > dev->internalEndBlock) {
2839 T(YAFFS_TRACE_ERROR,
2840 (TSTR("**>> Block %d is not valid" TENDSTR), b));
2844 bi = yaffs_GetBlockInfo(dev, b);
2846 if (bi->blockState == YAFFS_BLOCK_STATE_FULL &&
2847 (bi->pagesInUse - bi->softDeletions) < pagesInUse &&
2848 yaffs_BlockNotDisqualifiedFromGC(dev, bi)) {
2850 pagesInUse = (bi->pagesInUse - bi->softDeletions);
2854 dev->currentDirtyChecker = b;
2858 (TSTR("GC Selected block %d with %d free, prioritised:%d" TENDSTR), dirtiest,
2859 dev->param.nChunksPerBlock - pagesInUse, prioritised));
2862 dev->oldestDirtySequence = 0;
2865 dev->nonAggressiveSkip = 4;
2870 static void yaffs_BlockBecameDirty(yaffs_Device *dev, int blockNo)
2872 yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockNo);
2876 /* If the block is still healthy erase it and mark as clean.
2877 * If the block has had a data failure, then retire it.
2880 T(YAFFS_TRACE_GC | YAFFS_TRACE_ERASE,
2881 (TSTR("yaffs_BlockBecameDirty block %d state %d %s"TENDSTR),
2882 blockNo, bi->blockState, (bi->needsRetiring) ? "needs retiring" : ""));
2884 bi->blockState = YAFFS_BLOCK_STATE_DIRTY;
2886 if (!bi->needsRetiring) {
2887 yaffs_InvalidateCheckpoint(dev);
2888 erasedOk = yaffs_EraseBlockInNAND(dev, blockNo);
2890 dev->nErasureFailures++;
2891 T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
2892 (TSTR("**>> Erasure failed %d" TENDSTR), blockNo));
2897 ((yaffs_traceMask & YAFFS_TRACE_ERASE) || !yaffs_SkipVerification(dev))) {
2899 for (i = 0; i < dev->param.nChunksPerBlock; i++) {
2900 if (!yaffs_CheckChunkErased
2901 (dev, blockNo * dev->param.nChunksPerBlock + i)) {
2902 T(YAFFS_TRACE_ERROR,
2904 (">>Block %d erasure supposedly OK, but chunk %d not erased"
2905 TENDSTR), blockNo, i));
2911 /* Clean it up... */
2912 bi->blockState = YAFFS_BLOCK_STATE_EMPTY;
2913 bi->sequenceNumber = 0;
2914 dev->nErasedBlocks++;
2916 bi->softDeletions = 0;
2917 bi->hasShrinkHeader = 0;
2918 bi->skipErasedCheck = 1; /* This is clean, so no need to check */
2919 bi->gcPrioritise = 0;
2920 yaffs_ClearChunkBits(dev, blockNo);
2922 T(YAFFS_TRACE_ERASE,
2923 (TSTR("Erased block %d" TENDSTR), blockNo));
2925 dev->nFreeChunks -= dev->param.nChunksPerBlock; /* We lost a block of free space */
2927 yaffs_RetireBlock(dev, blockNo);
2928 T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
2929 (TSTR("**>> Block %d retired" TENDSTR), blockNo));
2933 static int yaffs_FindBlockForAllocation(yaffs_Device *dev)
2937 yaffs_BlockInfo *bi;
2939 if (dev->nErasedBlocks < 1) {
2940 /* Hoosterman we've got a problem.
2941 * Can't get space to gc
2943 T(YAFFS_TRACE_ERROR,
2944 (TSTR("yaffs tragedy: no more erased blocks" TENDSTR)));
2949 /* Find an empty block. */
2951 for (i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) {
2952 dev->allocationBlockFinder++;
2953 if (dev->allocationBlockFinder < dev->internalStartBlock
2954 || dev->allocationBlockFinder > dev->internalEndBlock) {
2955 dev->allocationBlockFinder = dev->internalStartBlock;
2958 bi = yaffs_GetBlockInfo(dev, dev->allocationBlockFinder);
2960 if (bi->blockState == YAFFS_BLOCK_STATE_EMPTY) {
2961 bi->blockState = YAFFS_BLOCK_STATE_ALLOCATING;
2962 dev->sequenceNumber++;
2963 bi->sequenceNumber = dev->sequenceNumber;
2964 dev->nErasedBlocks--;
2965 T(YAFFS_TRACE_ALLOCATE,
2966 (TSTR("Allocated block %d, seq %d, %d left" TENDSTR),
2967 dev->allocationBlockFinder, dev->sequenceNumber,
2968 dev->nErasedBlocks));
2969 return dev->allocationBlockFinder;
2973 T(YAFFS_TRACE_ALWAYS,
2975 ("yaffs tragedy: no more erased blocks, but there should have been %d"
2976 TENDSTR), dev->nErasedBlocks));
2983 static int yaffs_CalcCheckpointBlocksRequired(yaffs_Device *dev)
2985 if (!dev->nCheckpointBlocksRequired &&
2986 dev->param.isYaffs2) {
2987 /* Not a valid value so recalculate */
2990 int devBlocks = (dev->param.endBlock - dev->param.startBlock + 1);
2991 int tnodeSize = yaffs_CalcTnodeSize(dev);
2993 nBytes += sizeof(yaffs_CheckpointValidity);
2994 nBytes += sizeof(yaffs_CheckpointDevice);
2995 nBytes += devBlocks * sizeof(yaffs_BlockInfo);
2996 nBytes += devBlocks * dev->chunkBitmapStride;
2997 nBytes += (sizeof(yaffs_CheckpointObject) + sizeof(__u32)) * (dev->nObjectsCreated - dev->nFreeObjects);
2998 nBytes += (tnodeSize + sizeof(__u32)) * (dev->nTnodesCreated - dev->nFreeTnodes);
2999 nBytes += sizeof(yaffs_CheckpointValidity);
3000 nBytes += sizeof(__u32); /* checksum*/
3002 /* Round up and add 2 blocks to allow for some bad blocks, so add 3 */
3004 nBlocks = (nBytes/(dev->nDataBytesPerChunk * dev->param.nChunksPerBlock)) + 3;
3006 dev->nCheckpointBlocksRequired = nBlocks;
3009 return dev->nCheckpointBlocksRequired;
3013 * Check if there's space to allocate...
3014 * Thinks.... do we need top make this ths same as yaffs_GetFreeChunks()?
3016 static int yaffs_CheckSpaceForAllocation(yaffs_Device *dev)
3019 int reservedBlocks = dev->param.nReservedBlocks;
3020 int checkpointBlocks;
3022 if (dev->param.isYaffs2) {
3023 checkpointBlocks = yaffs_CalcCheckpointBlocksRequired(dev) -
3024 dev->blocksInCheckpoint;
3025 if (checkpointBlocks < 0)
3026 checkpointBlocks = 0;
3028 checkpointBlocks = 0;
3031 reservedChunks = ((reservedBlocks + checkpointBlocks) * dev->param.nChunksPerBlock);
3033 return (dev->nFreeChunks > reservedChunks);
3036 static int yaffs_AllocateChunk(yaffs_Device *dev, int useReserve,
3037 yaffs_BlockInfo **blockUsedPtr)
3040 yaffs_BlockInfo *bi;
3042 if (dev->allocationBlock < 0) {
3043 /* Get next block to allocate off */
3044 dev->allocationBlock = yaffs_FindBlockForAllocation(dev);
3045 dev->allocationPage = 0;
3048 if (!useReserve && !yaffs_CheckSpaceForAllocation(dev)) {
3049 /* Not enough space to allocate unless we're allowed to use the reserve. */
3053 if (dev->nErasedBlocks < dev->param.nReservedBlocks
3054 && dev->allocationPage == 0) {
3055 T(YAFFS_TRACE_ALLOCATE, (TSTR("Allocating reserve" TENDSTR)));
3058 /* Next page please.... */
3059 if (dev->allocationBlock >= 0) {
3060 bi = yaffs_GetBlockInfo(dev, dev->allocationBlock);
3062 retVal = (dev->allocationBlock * dev->param.nChunksPerBlock) +
3063 dev->allocationPage;
3065 yaffs_SetChunkBit(dev, dev->allocationBlock,
3066 dev->allocationPage);
3068 dev->allocationPage++;
3072 /* If the block is full set the state to full */
3073 if (dev->allocationPage >= dev->param.nChunksPerBlock) {
3074 bi->blockState = YAFFS_BLOCK_STATE_FULL;
3075 dev->allocationBlock = -1;
3084 T(YAFFS_TRACE_ERROR,
3085 (TSTR("!!!!!!!!! Allocator out !!!!!!!!!!!!!!!!!" TENDSTR)));
3090 static int yaffs_GetErasedChunks(yaffs_Device *dev)
3094 n = dev->nErasedBlocks * dev->param.nChunksPerBlock;
3096 if (dev->allocationBlock > 0)
3097 n += (dev->param.nChunksPerBlock - dev->allocationPage);
3104 * yaffs_SkipRestOfBlock() skips over the rest of the allocation block
3105 * if we don't want to write to it.
3107 static void yaffs_SkipRestOfBlock(yaffs_Device *dev)
3109 if(dev->allocationBlock > 0){
3110 yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, dev->allocationBlock);
3111 if(bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING){
3112 bi->blockState = YAFFS_BLOCK_STATE_FULL;
3113 dev->allocationBlock = -1;
3119 static int yaffs_GarbageCollectBlock(yaffs_Device *dev, int block,
3125 int retVal = YAFFS_OK;
3128 int isCheckpointBlock;
3132 int chunksBefore = yaffs_GetErasedChunks(dev);
3135 yaffs_ExtendedTags tags;
3137 yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, block);
3139 yaffs_Object *object;
3141 isCheckpointBlock = (bi->blockState == YAFFS_BLOCK_STATE_CHECKPOINT);
3144 T(YAFFS_TRACE_TRACING,
3145 (TSTR("Collecting block %d, in use %d, shrink %d, wholeBlock %d" TENDSTR),
3148 bi->hasShrinkHeader,
3151 /*yaffs_VerifyFreeChunks(dev); */
3153 if(bi->blockState == YAFFS_BLOCK_STATE_FULL)
3154 bi->blockState = YAFFS_BLOCK_STATE_COLLECTING;
3156 bi->hasShrinkHeader = 0; /* clear the flag so that the block can erase */
3158 /* Take off the number of soft deleted entries because
3159 * they're going to get really deleted during GC.
3161 if(dev->gcChunk == 0) /* first time through for this block */
3162 dev->nFreeChunks -= bi->softDeletions;
3166 if (isCheckpointBlock ||
3167 !yaffs_StillSomeChunkBits(dev, block)) {
3168 T(YAFFS_TRACE_TRACING,
3170 ("Collecting block %d that has no chunks in use" TENDSTR),
3172 yaffs_BlockBecameDirty(dev, block);
3175 __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__);
3177 yaffs_VerifyBlock(dev, bi, block);
3179 maxCopies = (wholeBlock) ? dev->param.nChunksPerBlock : 10;
3180 oldChunk = block * dev->param.nChunksPerBlock + dev->gcChunk;
3182 for (/* init already done */;
3183 retVal == YAFFS_OK &&
3184 dev->gcChunk < dev->param.nChunksPerBlock &&
3185 (bi->blockState == YAFFS_BLOCK_STATE_COLLECTING) &&
3187 dev->gcChunk++, oldChunk++) {
3188 if (yaffs_CheckChunkBit(dev, block, dev->gcChunk)) {
3190 /* This page is in use and might need to be copied off */
3196 yaffs_InitialiseTags(&tags);
3198 yaffs_ReadChunkWithTagsFromNAND(dev, oldChunk,
3202 yaffs_FindObjectByNumber(dev,
3205 T(YAFFS_TRACE_GC_DETAIL,
3207 ("Collecting chunk in block %d, %d %d %d " TENDSTR),
3208 dev->gcChunk, tags.objectId, tags.chunkId,
3211 if (object && !yaffs_SkipVerification(dev)) {
3212 if (tags.chunkId == 0)
3213 matchingChunk = object->hdrChunk;
3214 else if (object->softDeleted)
3215 matchingChunk = oldChunk; /* Defeat the test */
3217 matchingChunk = yaffs_FindChunkInFile(object, tags.chunkId, NULL);
3219 if (oldChunk != matchingChunk)
3220 T(YAFFS_TRACE_ERROR,
3221 (TSTR("gc: page in gc mismatch: %d %d %d %d"TENDSTR),
3222 oldChunk, matchingChunk, tags.objectId, tags.chunkId));
3227 T(YAFFS_TRACE_ERROR,
3229 ("page %d in gc has no object: %d %d %d "
3231 tags.objectId, tags.chunkId, tags.byteCount));
3236 object->softDeleted &&
3237 tags.chunkId != 0) {
3238 /* Data chunk in a soft deleted file, throw it away
3239 * It's a soft deleted data chunk,
3240 * No need to copy this, just forget about it and
3241 * fix up the object.
3244 object->nDataChunks--;
3246 if (object->nDataChunks <= 0) {
3247 /* remeber to clean up the object */
3248 dev->gcCleanupList[cleanups] =
3254 /* Todo object && object->deleted && object->nDataChunks == 0 */
3255 /* Deleted object header with no data chunks.
3256 * Can be discarded and the file deleted.
3258 object->hdrChunk = 0;
3259 yaffs_FreeTnode(object->myDev,
3262 object->variant.fileVariant.top = NULL;
3263 yaffs_DoGenericObjectDeletion(object);
3265 } else if (object) {
3266 /* It's either a data chunk in a live file or
3267 * an ObjectHeader, so we're interested in it.
3268 * NB Need to keep the ObjectHeaders of deleted files
3269 * until the whole file has been deleted off
3271 tags.serialNumber++;
3275 if (tags.chunkId == 0) {
3276 /* It is an object Id,
3277 * We need to nuke the shrinkheader flags first
3278 * Also need to clean up shadowing.
3279 * We no longer want the shrinkHeader flag since its work is done
3280 * and if it is left in place it will mess up scanning.
3283 yaffs_ObjectHeader *oh;
3284 oh = (yaffs_ObjectHeader *)buffer;
3286 tags.extraIsShrinkHeader = 0;
3287 oh->shadowsObject = 0;
3288 oh->inbandShadowsObject = 0;
3289 if(object->variantType == YAFFS_OBJECT_TYPE_FILE)
3290 oh->fileSize = object->variant.fileVariant.fileSize;
3291 tags.extraShadows = 0;
3293 yaffs_VerifyObjectHeader(object, oh, &tags, 1);
3295 yaffs_WriteNewChunkWithTagsToNAND(dev,(__u8 *) oh, &tags, 1);
3298 yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &tags, 1);
3301 retVal = YAFFS_FAIL;
3304 /* Ok, now fix up the Tnodes etc. */
3306 if (tags.chunkId == 0) {
3308 object->hdrChunk = newChunk;
3309 object->serial = tags.serialNumber;
3311 /* It's a data chunk */
3313 ok = yaffs_PutChunkIntoFile
3321 if (retVal == YAFFS_OK)
3322 yaffs_DeleteChunk(dev, oldChunk, markNAND, __LINE__);
3327 yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
3330 /* Do any required cleanups */
3331 for (i = 0; i < cleanups; i++) {
3332 /* Time to delete the file too */
3334 yaffs_FindObjectByNumber(dev,
3335 dev->gcCleanupList[i]);
3337 yaffs_FreeTnode(dev,
3338 object->variant.fileVariant.
3340 object->variant.fileVariant.top = NULL;
3343 ("yaffs: About to finally delete object %d"
3344 TENDSTR), object->objectId));
3345 yaffs_DoGenericObjectDeletion(object);
3346 object->myDev->nDeletedFiles--;
3353 yaffs_VerifyCollectedBlock(dev, bi, block);
3357 /* If the gc completed then clear the current gcBlock so that we find another. */
3358 if (bi->blockState != YAFFS_BLOCK_STATE_COLLECTING) {
3359 chunksAfter = yaffs_GetErasedChunks(dev);
3360 if (chunksBefore >= chunksAfter) {
3363 ("gc did not increase free chunks before %d after %d"
3364 TENDSTR), chunksBefore, chunksAfter));
3375 /* New garbage collector
3376 * If we're very low on erased blocks then we do aggressive garbage collection
3377 * otherwise we do "leasurely" garbage collection.
3378 * Aggressive gc looks further (whole array) and will accept less dirty blocks.
3379 * Passive gc only inspects smaller areas and will only accept more dirty blocks.
3381 * The idea is to help clear out space in a more spread-out manner.
3382 * Dunno if it really does anything useful.
3384 static int yaffs_CheckGarbageCollection(yaffs_Device *dev)
3388 int gcOk = YAFFS_OK;
3391 int checkpointBlockAdjust;
3393 if (dev->isDoingGC) {
3394 /* Bail out so we don't get recursive gc */
3398 /* This loop should pass the first time.
3399 * We'll only see looping here if the erase of the collected block fails.
3405 checkpointBlockAdjust = yaffs_CalcCheckpointBlocksRequired(dev) - dev->blocksInCheckpoint;
3406 if (checkpointBlockAdjust < 0)
3407 checkpointBlockAdjust = 0;
3409 /* If we need a block soon then do aggressive gc.*/
3410 if (dev->nErasedBlocks < (dev->param.nReservedBlocks + checkpointBlockAdjust + 2))
3415 /* If we don't already have a block being gc'd then see if we should start another */
3417 if (dev->gcBlock < 1 && !aggressive) {
3418 dev->gcBlock = yaffs_FindRefreshBlock(dev);
3421 if (dev->gcBlock < 1) {
3422 dev->gcBlock = yaffs_FindBlockForGarbageCollection(dev, aggressive);
3426 block = dev->gcBlock;
3429 dev->garbageCollections++;
3431 dev->passiveGarbageCollections++;
3435 ("yaffs: GC erasedBlocks %d aggressive %d" TENDSTR),
3436 dev->nErasedBlocks, aggressive));
3438 gcOk = yaffs_GarbageCollectBlock(dev, block, aggressive);
3441 if (dev->nErasedBlocks < (dev->param.nReservedBlocks) && block > 0) {
3444 ("yaffs: GC !!!no reclaim!!! erasedBlocks %d after try %d block %d"
3445 TENDSTR), dev->nErasedBlocks, maxTries, block));
3447 } while ((dev->nErasedBlocks < dev->param.nReservedBlocks) &&
3451 return aggressive ? gcOk : YAFFS_OK;
3454 /*------------------------- TAGS --------------------------------*/
3456 static int yaffs_TagsMatch(const yaffs_ExtendedTags *tags, int objectId,
3459 return (tags->chunkId == chunkInObject &&
3460 tags->objectId == objectId && !tags->chunkDeleted) ? 1 : 0;
3465 /*-------------------- Data file manipulation -----------------*/
3467 static int yaffs_FindChunkInFile(yaffs_Object *in, int chunkInInode,
3468 yaffs_ExtendedTags *tags)
3470 /*Get the Tnode, then get the level 0 offset chunk offset */
3473 yaffs_ExtendedTags localTags;
3476 yaffs_Device *dev = in->myDev;
3479 /* Passed a NULL, so use our own tags space */
3483 tn = yaffs_FindLevel0Tnode(dev, &in->variant.fileVariant, chunkInInode);
3486 theChunk = yaffs_GetChunkGroupBase(dev, tn, chunkInInode);
3489 yaffs_FindChunkInGroup(dev, theChunk, tags, in->objectId,
3495 static int yaffs_FindAndDeleteChunkInFile(yaffs_Object *in, int chunkInInode,
3496 yaffs_ExtendedTags *tags)
3498 /* Get the Tnode, then get the level 0 offset chunk offset */
3501 yaffs_ExtendedTags localTags;
3503 yaffs_Device *dev = in->myDev;
3507 /* Passed a NULL, so use our own tags space */
3511 tn = yaffs_FindLevel0Tnode(dev, &in->variant.fileVariant, chunkInInode);
3515 theChunk = yaffs_GetChunkGroupBase(dev, tn, chunkInInode);
3518 yaffs_FindChunkInGroup(dev, theChunk, tags, in->objectId,
3521 /* Delete the entry in the filestructure (if found) */
3523 yaffs_LoadLevel0Tnode(dev, tn, chunkInInode, 0);
3529 #ifdef YAFFS_PARANOID
3531 static int yaffs_CheckFileSanity(yaffs_Object *in)
3539 yaffs_Tags localTags;
3540 yaffs_Tags *tags = &localTags;
3544 if (in->variantType != YAFFS_OBJECT_TYPE_FILE)
3547 objId = in->objectId;
3548 fSize = in->variant.fileVariant.fileSize;
3550 (fSize + in->myDev->nDataBytesPerChunk - 1) / in->myDev->nDataBytesPerChunk;
3552 for (chunk = 1; chunk <= nChunks; chunk++) {
3553 tn = yaffs_FindLevel0Tnode(in->myDev, &in->variant.fileVariant,
3558 theChunk = yaffs_GetChunkGroupBase(dev, tn, chunk);
3560 if (yaffs_CheckChunkBits
3561 (dev, theChunk / dev->param.nChunksPerBlock,
3562 theChunk % dev->param.nChunksPerBlock)) {
3564 yaffs_ReadChunkTagsFromNAND(in->myDev, theChunk,
3568 (tags, in->objectId, chunk, chunkDeleted)) {
3578 /* T(("No level 0 found for %d\n", chunk)); */
3582 return failed ? YAFFS_FAIL : YAFFS_OK;
3587 static int yaffs_PutChunkIntoFile(yaffs_Object *in, int chunkInInode,
3588 int chunkInNAND, int inScan)
3590 /* NB inScan is zero unless scanning.
3591 * For forward scanning, inScan is > 0;
3592 * for backward scanning inScan is < 0
3594 * chunkInNAND = 0 is a dummy insert to make sure the tnodes are there.
3598 yaffs_Device *dev = in->myDev;
3600 yaffs_ExtendedTags existingTags;
3601 yaffs_ExtendedTags newTags;
3602 unsigned existingSerial, newSerial;
3604 if (in->variantType != YAFFS_OBJECT_TYPE_FILE) {
3605 /* Just ignore an attempt at putting a chunk into a non-file during scanning
3606 * If it is not during Scanning then something went wrong!
3609 T(YAFFS_TRACE_ERROR,
3611 ("yaffs tragedy:attempt to put data chunk into a non-file"
3616 yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__);
3620 tn = yaffs_AddOrFindLevel0Tnode(dev,
3621 &in->variant.fileVariant,
3628 /* Dummy insert, bail now */
3631 existingChunk = yaffs_GetChunkGroupBase(dev, tn, chunkInInode);
3634 /* If we're scanning then we need to test for duplicates
3635 * NB This does not need to be efficient since it should only ever
3636 * happen when the power fails during a write, then only one
3637 * chunk should ever be affected.
3639 * Correction for YAFFS2: This could happen quite a lot and we need to think about efficiency! TODO
3640 * Update: For backward scanning we don't need to re-read tags so this is quite cheap.
3643 if (existingChunk > 0) {
3644 /* NB Right now existing chunk will not be real chunkId if the device >= 32MB
3645 * thus we have to do a FindChunkInFile to get the real chunk id.
3647 * We have a duplicate now we need to decide which one to use:
3649 * Backwards scanning YAFFS2: The old one is what we use, dump the new one.
3650 * Forward scanning YAFFS2: The new one is what we use, dump the old one.
3651 * YAFFS1: Get both sets of tags and compare serial numbers.
3655 /* Only do this for forward scanning */
3656 yaffs_ReadChunkWithTagsFromNAND(dev,
3660 /* Do a proper find */
3662 yaffs_FindChunkInFile(in, chunkInInode,
3666 if (existingChunk <= 0) {
3667 /*Hoosterman - how did this happen? */
3669 T(YAFFS_TRACE_ERROR,
3671 ("yaffs tragedy: existing chunk < 0 in scan"
3676 /* NB The deleted flags should be false, otherwise the chunks will
3677 * not be loaded during a scan
3681 newSerial = newTags.serialNumber;
3682 existingSerial = existingTags.serialNumber;
3686 (in->myDev->param.isYaffs2 ||
3687 existingChunk <= 0 ||
3688 ((existingSerial + 1) & 3) == newSerial)) {
3689 /* Forward scanning.
3691 * Delete the old one and drop through to update the tnode
3693 yaffs_DeleteChunk(dev, existingChunk, 1,
3696 /* Backward scanning or we want to use the existing one
3698 * Delete the new one and return early so that the tnode isn't changed
3700 yaffs_DeleteChunk(dev, chunkInNAND, 1,
3708 if (existingChunk == 0)
3711 yaffs_LoadLevel0Tnode(dev, tn, chunkInInode, chunkInNAND);
3716 static int yaffs_ReadChunkDataFromObject(yaffs_Object *in, int chunkInInode,
3719 int chunkInNAND = yaffs_FindChunkInFile(in, chunkInInode, NULL);
3721 if (chunkInNAND >= 0)
3722 return yaffs_ReadChunkWithTagsFromNAND(in->myDev, chunkInNAND,
3725 T(YAFFS_TRACE_NANDACCESS,
3726 (TSTR("Chunk %d not found zero instead" TENDSTR),
3728 /* get sane (zero) data if you read a hole */
3729 memset(buffer, 0, in->myDev->nDataBytesPerChunk);
3735 void yaffs_DeleteChunk(yaffs_Device *dev, int chunkId, int markNAND, int lyn)
3739 yaffs_ExtendedTags tags;
3740 yaffs_BlockInfo *bi;
3746 block = chunkId / dev->param.nChunksPerBlock;
3747 page = chunkId % dev->param.nChunksPerBlock;
3750 if (!yaffs_CheckChunkBit(dev, block, page))
3751 T(YAFFS_TRACE_VERIFY,
3752 (TSTR("Deleting invalid chunk %d"TENDSTR),
3755 bi = yaffs_GetBlockInfo(dev, block);
3757 T(YAFFS_TRACE_DELETION,
3758 (TSTR("line %d delete of chunk %d" TENDSTR), lyn, chunkId));
3761 bi->blockState != YAFFS_BLOCK_STATE_COLLECTING && !dev->param.isYaffs2) {
3763 yaffs_InitialiseTags(&tags);
3765 tags.chunkDeleted = 1;
3767 yaffs_WriteChunkWithTagsToNAND(dev, chunkId, NULL, &tags);
3768 yaffs_HandleUpdateChunk(dev, chunkId, &tags);
3770 dev->nUnmarkedDeletions++;
3773 /* Pull out of the management area.
3774 * If the whole block became dirty, this will kick off an erasure.
3776 if (bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING ||
3777 bi->blockState == YAFFS_BLOCK_STATE_FULL ||
3778 bi->blockState == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
3779 bi->blockState == YAFFS_BLOCK_STATE_COLLECTING) {
3782 yaffs_ClearChunkBit(dev, block, page);
3786 if (bi->pagesInUse == 0 &&
3787 !bi->hasShrinkHeader &&
3788 bi->blockState != YAFFS_BLOCK_STATE_ALLOCATING &&
3789 bi->blockState != YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
3790 yaffs_BlockBecameDirty(dev, block);
3797 static int yaffs_WriteChunkDataToObject(yaffs_Object *in, int chunkInInode,
3798 const __u8 *buffer, int nBytes,
3801 /* Find old chunk Need to do this to get serial number
3802 * Write new one and patch into tree.
3803 * Invalidate old tags.
3807 yaffs_ExtendedTags prevTags;
3810 yaffs_ExtendedTags newTags;
3812 yaffs_Device *dev = in->myDev;
3814 yaffs_CheckGarbageCollection(dev);
3816 /* Get the previous chunk at this location in the file if it exists.
3817 * If it does not exist then put a zero into the tree. This creates
3818 * the tnode now, rather than later when it is harder to clean up.
3820 prevChunkId = yaffs_FindChunkInFile(in, chunkInInode, &prevTags);
3821 if(prevChunkId < 1 &&
3822 !yaffs_PutChunkIntoFile(in, chunkInInode, 0, 0))
3825 /* Set up new tags */
3826 yaffs_InitialiseTags(&newTags);
3828 newTags.chunkId = chunkInInode;
3829 newTags.objectId = in->objectId;
3830 newTags.serialNumber =
3831 (prevChunkId > 0) ? prevTags.serialNumber + 1 : 1;
3832 newTags.byteCount = nBytes;
3834 if (nBytes < 1 || nBytes > dev->param.totalBytesPerChunk) {
3835 T(YAFFS_TRACE_ERROR,
3836 (TSTR("Writing %d bytes to chunk!!!!!!!!!" TENDSTR), nBytes));
3842 yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &newTags,
3845 if (newChunkId > 0) {
3846 yaffs_PutChunkIntoFile(in, chunkInInode, newChunkId, 0);
3848 if (prevChunkId > 0)
3849 yaffs_DeleteChunk(dev, prevChunkId, 1, __LINE__);
3851 yaffs_CheckFileSanity(in);
3857 /* UpdateObjectHeader updates the header on NAND for an object.
3858 * If name is not NULL, then that new name is used.
3860 int yaffs_UpdateObjectHeader(yaffs_Object *in, const YCHAR *name, int force,
3861 int isShrink, int shadows)
3864 yaffs_BlockInfo *bi;
3866 yaffs_Device *dev = in->myDev;
3873 yaffs_ExtendedTags newTags;
3874 yaffs_ExtendedTags oldTags;
3875 YCHAR *alias = NULL;
3877 __u8 *buffer = NULL;
3878 YCHAR oldName[YAFFS_MAX_NAME_LENGTH + 1];
3880 yaffs_ObjectHeader *oh = NULL;
3882 yaffs_strcpy(oldName, _Y("silly old name"));
3886 in == dev->rootDir || /* The rootDir should also be saved */
3889 yaffs_CheckGarbageCollection(dev);
3890 yaffs_CheckObjectDetailsLoaded(in);
3892 buffer = yaffs_GetTempBuffer(in->myDev, __LINE__);
3893 oh = (yaffs_ObjectHeader *) buffer;
3895 prevChunkId = in->hdrChunk;
3897 if (prevChunkId > 0) {
3898 result = yaffs_ReadChunkWithTagsFromNAND(dev, prevChunkId,
3901 yaffs_VerifyObjectHeader(in, oh, &oldTags, 0);
3903 memcpy(oldName, oh->name, sizeof(oh->name));
3906 memset(buffer, 0xFF, dev->nDataBytesPerChunk);
3908 oh->type = in->variantType;
3909 oh->yst_mode = in->yst_mode;
3910 oh->shadowsObject = oh->inbandShadowsObject = shadows;
3912 #ifdef CONFIG_YAFFS_WINCE
3913 oh->win_atime[0] = in->win_atime[0];
3914 oh->win_ctime[0] = in->win_ctime[0];
3915 oh->win_mtime[0] = in->win_mtime[0];
3916 oh->win_atime[1] = in->win_atime[1];
3917 oh->win_ctime[1] = in->win_ctime[1];
3918 oh->win_mtime[1] = in->win_mtime[1];
3920 oh->yst_uid = in->yst_uid;
3921 oh->yst_gid = in->yst_gid;
3922 oh->yst_atime = in->yst_atime;
3923 oh->yst_mtime = in->yst_mtime;
3924 oh->yst_ctime = in->yst_ctime;
3925 oh->yst_rdev = in->yst_rdev;
3928 oh->parentObjectId = in->parent->objectId;
3930 oh->parentObjectId = 0;
3932 if (name && *name) {
3933 memset(oh->name, 0, sizeof(oh->name));
3934 yaffs_strncpy(oh->name, name, YAFFS_MAX_NAME_LENGTH);
3935 } else if (prevChunkId > 0)
3936 memcpy(oh->name, oldName, sizeof(oh->name));
3938 memset(oh->name, 0, sizeof(oh->name));
3940 oh->isShrink = isShrink;
3942 switch (in->variantType) {
3943 case YAFFS_OBJECT_TYPE_UNKNOWN:
3944 /* Should not happen */
3946 case YAFFS_OBJECT_TYPE_FILE:
3948 (oh->parentObjectId == YAFFS_OBJECTID_DELETED
3949 || oh->parentObjectId ==
3950 YAFFS_OBJECTID_UNLINKED) ? 0 : in->variant.
3951 fileVariant.fileSize;
3953 case YAFFS_OBJECT_TYPE_HARDLINK:
3954 oh->equivalentObjectId =
3955 in->variant.hardLinkVariant.equivalentObjectId;
3957 case YAFFS_OBJECT_TYPE_SPECIAL:
3960 case YAFFS_OBJECT_TYPE_DIRECTORY:
3963 case YAFFS_OBJECT_TYPE_SYMLINK:
3964 alias = in->variant.symLinkVariant.alias;
3966 alias = _Y("no alias");
3967 yaffs_strncpy(oh->alias,
3969 YAFFS_MAX_ALIAS_LENGTH);
3970 oh->alias[YAFFS_MAX_ALIAS_LENGTH] = 0;
3975 yaffs_InitialiseTags(&newTags);
3977 newTags.chunkId = 0;
3978 newTags.objectId = in->objectId;
3979 newTags.serialNumber = in->serial;
3981 /* Add extra info for file header */
3983 newTags.extraHeaderInfoAvailable = 1;
3984 newTags.extraParentObjectId = oh->parentObjectId;
3985 newTags.extraFileLength = oh->fileSize;
3986 newTags.extraIsShrinkHeader = oh->isShrink;
3987 newTags.extraEquivalentObjectId = oh->equivalentObjectId;
3988 newTags.extraShadows = (oh->shadowsObject > 0) ? 1 : 0;
3989 newTags.extraObjectType = in->variantType;
3991 yaffs_VerifyObjectHeader(in, oh, &newTags, 1);
3993 /* Create new chunk in NAND */
3995 yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &newTags,
3996 (prevChunkId > 0) ? 1 : 0);
3998 if (newChunkId >= 0) {
4000 in->hdrChunk = newChunkId;
4002 if (prevChunkId > 0) {
4003 yaffs_DeleteChunk(dev, prevChunkId, 1,
4007 if (!yaffs_ObjectHasCachedWriteData(in))
4010 /* If this was a shrink, then mark the block that the chunk lives on */
4012 bi = yaffs_GetBlockInfo(in->myDev,
4013 newChunkId / in->myDev->param.nChunksPerBlock);
4014 bi->hasShrinkHeader = 1;
4019 retVal = newChunkId;
4024 yaffs_ReleaseTempBuffer(dev, buffer, __LINE__);
4029 /*------------------------ Short Operations Cache ----------------------------------------
4030 * In many situations where there is no high level buffering (eg WinCE) a lot of
4031 * reads might be short sequential reads, and a lot of writes may be short
4032 * sequential writes. eg. scanning/writing a jpeg file.
4033 * In these cases, a short read/write cache can provide a huge perfomance benefit
4034 * with dumb-as-a-rock code.
4035 * In Linux, the page cache provides read buffering aand the short op cache provides write
4038 * There are a limited number (~10) of cache chunks per device so that we don't
4039 * need a very intelligent search.
4042 static int yaffs_ObjectHasCachedWriteData(yaffs_Object *obj)
4044 yaffs_Device *dev = obj->myDev;
4046 yaffs_ChunkCache *cache;
4047 int nCaches = obj->myDev->param.nShortOpCaches;
4049 for (i = 0; i < nCaches; i++) {
4050 cache = &dev->srCache[i];
4051 if (cache->object == obj &&
4060 static void yaffs_FlushFilesChunkCache(yaffs_Object *obj)
4062 yaffs_Device *dev = obj->myDev;
4063 int lowest = -99; /* Stop compiler whining. */
4065 yaffs_ChunkCache *cache;
4066 int chunkWritten = 0;
4067 int nCaches = obj->myDev->param.nShortOpCaches;
4073 /* Find the dirty cache for this object with the lowest chunk id. */
4074 for (i = 0; i < nCaches; i++) {
4075 if (dev->srCache[i].object == obj &&
4076 dev->srCache[i].dirty) {
4078 || dev->srCache[i].chunkId <
4080 cache = &dev->srCache[i];
4081 lowest = cache->chunkId;
4086 if (cache && !cache->locked) {
4087 /* Write it out and free it up */
4090 yaffs_WriteChunkDataToObject(cache->object,
4096 cache->object = NULL;
4099 } while (cache && chunkWritten > 0);
4102 /* Hoosterman, disk full while writing cache out. */
4103 T(YAFFS_TRACE_ERROR,
4104 (TSTR("yaffs tragedy: no space during cache write" TENDSTR)));
4111 /*yaffs_FlushEntireDeviceCache(dev)
4116 void yaffs_FlushEntireDeviceCache(yaffs_Device *dev)
4119 int nCaches = dev->param.nShortOpCaches;
4122 /* Find a dirty object in the cache and flush it...
4123 * until there are no further dirty objects.
4127 for (i = 0; i < nCaches && !obj; i++) {
4128 if (dev->srCache[i].object &&
4129 dev->srCache[i].dirty)
4130 obj = dev->srCache[i].object;
4134 yaffs_FlushFilesChunkCache(obj);
4141 /* Grab us a cache chunk for use.
4142 * First look for an empty one.
4143 * Then look for the least recently used non-dirty one.
4144 * Then look for the least recently used dirty one...., flush and look again.
4146 static yaffs_ChunkCache *yaffs_GrabChunkCacheWorker(yaffs_Device *dev)
4150 if (dev->param.nShortOpCaches > 0) {
4151 for (i = 0; i < dev->param.nShortOpCaches; i++) {
4152 if (!dev->srCache[i].object)
4153 return &dev->srCache[i];
4160 static yaffs_ChunkCache *yaffs_GrabChunkCache(yaffs_Device *dev)
4162 yaffs_ChunkCache *cache;
4163 yaffs_Object *theObj;
4168 if (dev->param.nShortOpCaches > 0) {
4169 /* Try find a non-dirty one... */
4171 cache = yaffs_GrabChunkCacheWorker(dev);
4174 /* They were all dirty, find the last recently used object and flush
4175 * its cache, then find again.
4176 * NB what's here is not very accurate, we actually flush the object
4177 * the last recently used page.
4180 /* With locking we can't assume we can use entry zero */
4187 for (i = 0; i < dev->param.nShortOpCaches; i++) {
4188 if (dev->srCache[i].object &&
4189 !dev->srCache[i].locked &&
4190 (dev->srCache[i].lastUse < usage || !cache)) {
4191 usage = dev->srCache[i].lastUse;
4192 theObj = dev->srCache[i].object;
4193 cache = &dev->srCache[i];
4198 if (!cache || cache->dirty) {
4199 /* Flush and try again */
4200 yaffs_FlushFilesChunkCache(theObj);
4201 cache = yaffs_GrabChunkCacheWorker(dev);
4211 /* Find a cached chunk */
4212 static yaffs_ChunkCache *yaffs_FindChunkCache(const yaffs_Object *obj,
4215 yaffs_Device *dev = obj->myDev;
4217 if (dev->param.nShortOpCaches > 0) {
4218 for (i = 0; i < dev->param.nShortOpCaches; i++) {
4219 if (dev->srCache[i].object == obj &&
4220 dev->srCache[i].chunkId == chunkId) {
4223 return &dev->srCache[i];
4230 /* Mark the chunk for the least recently used algorithym */
4231 static void yaffs_UseChunkCache(yaffs_Device *dev, yaffs_ChunkCache *cache,
4235 if (dev->param.nShortOpCaches > 0) {
4236 if (dev->srLastUse < 0 || dev->srLastUse > 100000000) {
4237 /* Reset the cache usages */
4239 for (i = 1; i < dev->param.nShortOpCaches; i++)
4240 dev->srCache[i].lastUse = 0;
4247 cache->lastUse = dev->srLastUse;
4254 /* Invalidate a single cache page.
4255 * Do this when a whole page gets written,
4256 * ie the short cache for this page is no longer valid.
4258 static void yaffs_InvalidateChunkCache(yaffs_Object *object, int chunkId)
4260 if (object->myDev->param.nShortOpCaches > 0) {
4261 yaffs_ChunkCache *cache = yaffs_FindChunkCache(object, chunkId);
4264 cache->object = NULL;
4268 /* Invalidate all the cache pages associated with this object
4269 * Do this whenever ther file is deleted or resized.
4271 static void yaffs_InvalidateWholeChunkCache(yaffs_Object *in)
4274 yaffs_Device *dev = in->myDev;
4276 if (dev->param.nShortOpCaches > 0) {
4277 /* Invalidate it. */
4278 for (i = 0; i < dev->param.nShortOpCaches; i++) {
4279 if (dev->srCache[i].object == in)
4280 dev->srCache[i].object = NULL;
4285 /*--------------------- Checkpointing --------------------*/
4288 static int yaffs_WriteCheckpointValidityMarker(yaffs_Device *dev, int head)
4290 yaffs_CheckpointValidity cp;
4292 memset(&cp, 0, sizeof(cp));
4294 cp.structType = sizeof(cp);
4295 cp.magic = YAFFS_MAGIC;
4296 cp.version = YAFFS_CHECKPOINT_VERSION;
4297 cp.head = (head) ? 1 : 0;
4299 return (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp)) ?
4303 static int yaffs_ReadCheckpointValidityMarker(yaffs_Device *dev, int head)
4305 yaffs_CheckpointValidity cp;
4308 ok = (yaffs_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp));
4311 ok = (cp.structType == sizeof(cp)) &&
4312 (cp.magic == YAFFS_MAGIC) &&
4313 (cp.version == YAFFS_CHECKPOINT_VERSION) &&
4314 (cp.head == ((head) ? 1 : 0));
4318 static void yaffs_DeviceToCheckpointDevice(yaffs_CheckpointDevice *cp,
4321 cp->nErasedBlocks = dev->nErasedBlocks;
4322 cp->allocationBlock = dev->allocationBlock;
4323 cp->allocationPage = dev->allocationPage;
4324 cp->nFreeChunks = dev->nFreeChunks;
4326 cp->nDeletedFiles = dev->nDeletedFiles;
4327 cp->nUnlinkedFiles = dev->nUnlinkedFiles;
4328 cp->nBackgroundDeletions = dev->nBackgroundDeletions;
4329 cp->sequenceNumber = dev->sequenceNumber;
4333 static void yaffs_CheckpointDeviceToDevice(yaffs_Device *dev,
4334 yaffs_CheckpointDevice *cp)
4336 dev->nErasedBlocks = cp->nErasedBlocks;
4337 dev->allocationBlock = cp->allocationBlock;
4338 dev->allocationPage = cp->allocationPage;
4339 dev->nFreeChunks = cp->nFreeChunks;
4341 dev->nDeletedFiles = cp->nDeletedFiles;
4342 dev->nUnlinkedFiles = cp->nUnlinkedFiles;
4343 dev->nBackgroundDeletions = cp->nBackgroundDeletions;
4344 dev->sequenceNumber = cp->sequenceNumber;
4348 static int yaffs_WriteCheckpointDevice(yaffs_Device *dev)
4350 yaffs_CheckpointDevice cp;
4352 __u32 nBlocks = (dev->internalEndBlock - dev->internalStartBlock + 1);
4356 /* Write device runtime values*/
4357 yaffs_DeviceToCheckpointDevice(&cp, dev);
4358 cp.structType = sizeof(cp);
4360 ok = (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp));
4362 /* Write block info */
4364 nBytes = nBlocks * sizeof(yaffs_BlockInfo);
4365 ok = (yaffs_CheckpointWrite(dev, dev->blockInfo, nBytes) == nBytes);
4368 /* Write chunk bits */
4370 nBytes = nBlocks * dev->chunkBitmapStride;
4371 ok = (yaffs_CheckpointWrite(dev, dev->chunkBits, nBytes) == nBytes);
4377 static int yaffs_ReadCheckpointDevice(yaffs_Device *dev)
4379 yaffs_CheckpointDevice cp;
4381 __u32 nBlocks = (dev->internalEndBlock - dev->internalStartBlock + 1);
4385 ok = (yaffs_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp));
4389 if (cp.structType != sizeof(cp))
4393 yaffs_CheckpointDeviceToDevice(dev, &cp);
4395 nBytes = nBlocks * sizeof(yaffs_BlockInfo);
4397 ok = (yaffs_CheckpointRead(dev, dev->blockInfo, nBytes) == nBytes);
4401 nBytes = nBlocks * dev->chunkBitmapStride;
4403 ok = (yaffs_CheckpointRead(dev, dev->chunkBits, nBytes) == nBytes);
4408 static void yaffs_ObjectToCheckpointObject(yaffs_CheckpointObject *cp,
4412 cp->objectId = obj->objectId;
4413 cp->parentId = (obj->parent) ? obj->parent->objectId : 0;
4414 cp->hdrChunk = obj->hdrChunk;
4415 cp->variantType = obj->variantType;
4416 cp->deleted = obj->deleted;
4417 cp->softDeleted = obj->softDeleted;
4418 cp->unlinked = obj->unlinked;
4419 cp->fake = obj->fake;
4420 cp->renameAllowed = obj->renameAllowed;
4421 cp->unlinkAllowed = obj->unlinkAllowed;
4422 cp->serial = obj->serial;
4423 cp->nDataChunks = obj->nDataChunks;
4425 if (obj->variantType == YAFFS_OBJECT_TYPE_FILE)
4426 cp->fileSizeOrEquivalentObjectId = obj->variant.fileVariant.fileSize;
4427 else if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK)
4428 cp->fileSizeOrEquivalentObjectId = obj->variant.hardLinkVariant.equivalentObjectId;
4431 static int yaffs_CheckpointObjectToObject(yaffs_Object *obj, yaffs_CheckpointObject *cp)
4434 yaffs_Object *parent;
4436 if (obj->variantType != cp->variantType) {
4437 T(YAFFS_TRACE_ERROR, (TSTR("Checkpoint read object %d type %d "
4438 TCONT("chunk %d does not match existing object type %d")
4439 TENDSTR), cp->objectId, cp->variantType, cp->hdrChunk,
4444 obj->objectId = cp->objectId;
4447 parent = yaffs_FindOrCreateObjectByNumber(
4450 YAFFS_OBJECT_TYPE_DIRECTORY);
4455 if (parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
4456 T(YAFFS_TRACE_ALWAYS, (TSTR("Checkpoint read object %d parent %d type %d"
4457 TCONT(" chunk %d Parent type, %d, not directory")
4459 cp->objectId, cp->parentId, cp->variantType,
4460 cp->hdrChunk, parent->variantType));
4463 yaffs_AddObjectToDirectory(parent, obj);
4466 obj->hdrChunk = cp->hdrChunk;
4467 obj->variantType = cp->variantType;
4468 obj->deleted = cp->deleted;
4469 obj->softDeleted = cp->softDeleted;
4470 obj->unlinked = cp->unlinked;
4471 obj->fake = cp->fake;
4472 obj->renameAllowed = cp->renameAllowed;
4473 obj->unlinkAllowed = cp->unlinkAllowed;
4474 obj->serial = cp->serial;
4475 obj->nDataChunks = cp->nDataChunks;
4477 if (obj->variantType == YAFFS_OBJECT_TYPE_FILE)
4478 obj->variant.fileVariant.fileSize = cp->fileSizeOrEquivalentObjectId;
4479 else if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK)
4480 obj->variant.hardLinkVariant.equivalentObjectId = cp->fileSizeOrEquivalentObjectId;
4482 if (obj->hdrChunk > 0)
4483 obj->lazyLoaded = 1;
4489 static int yaffs_CheckpointTnodeWorker(yaffs_Object *in, yaffs_Tnode *tn,
4490 __u32 level, int chunkOffset)
4493 yaffs_Device *dev = in->myDev;
4495 int tnodeSize = yaffs_CalcTnodeSize(dev);
4500 for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++) {
4501 if (tn->internal[i]) {
4502 ok = yaffs_CheckpointTnodeWorker(in,
4505 (chunkOffset<<YAFFS_TNODES_INTERNAL_BITS) + i);
4508 } else if (level == 0) {
4509 __u32 baseOffset = chunkOffset << YAFFS_TNODES_LEVEL0_BITS;
4510 ok = (yaffs_CheckpointWrite(dev, &baseOffset, sizeof(baseOffset)) == sizeof(baseOffset));
4512 ok = (yaffs_CheckpointWrite(dev, tn, tnodeSize) == tnodeSize);
4520 static int yaffs_WriteCheckpointTnodes(yaffs_Object *obj)
4522 __u32 endMarker = ~0;
4525 if (obj->variantType == YAFFS_OBJECT_TYPE_FILE) {
4526 ok = yaffs_CheckpointTnodeWorker(obj,
4527 obj->variant.fileVariant.top,
4528 obj->variant.fileVariant.topLevel,
4531 ok = (yaffs_CheckpointWrite(obj->myDev, &endMarker, sizeof(endMarker)) ==
4538 static int yaffs_ReadCheckpointTnodes(yaffs_Object *obj)
4542 yaffs_Device *dev = obj->myDev;
4543 yaffs_FileStructure *fileStructPtr = &obj->variant.fileVariant;
4546 int tnodeSize = yaffs_CalcTnodeSize(dev);
4548 ok = (yaffs_CheckpointRead(dev, &baseChunk, sizeof(baseChunk)) == sizeof(baseChunk));
4550 while (ok && (~baseChunk)) {
4552 /* Read level 0 tnode */
4555 tn = yaffs_GetTnodeRaw(dev);
4557 ok = (yaffs_CheckpointRead(dev, tn, tnodeSize) == tnodeSize);
4562 ok = yaffs_AddOrFindLevel0Tnode(dev,
4568 ok = (yaffs_CheckpointRead(dev, &baseChunk, sizeof(baseChunk)) == sizeof(baseChunk));
4572 T(YAFFS_TRACE_CHECKPOINT, (
4573 TSTR("Checkpoint read tnodes %d records, last %d. ok %d" TENDSTR),
4574 nread, baseChunk, ok));
4580 static int yaffs_WriteCheckpointObjects(yaffs_Device *dev)
4583 yaffs_CheckpointObject cp;
4586 struct ylist_head *lh;
4589 /* Iterate through the objects in each hash entry,
4590 * dumping them to the checkpointing stream.
4593 for (i = 0; ok && i < YAFFS_NOBJECT_BUCKETS; i++) {
4594 ylist_for_each(lh, &dev->objectBucket[i].list) {
4596 obj = ylist_entry(lh, yaffs_Object, hashLink);
4597 if (!obj->deferedFree) {
4598 yaffs_ObjectToCheckpointObject(&cp, obj);
4599 cp.structType = sizeof(cp);
4601 T(YAFFS_TRACE_CHECKPOINT, (
4602 TSTR("Checkpoint write object %d parent %d type %d chunk %d obj addr %p" TENDSTR),
4603 cp.objectId, cp.parentId, cp.variantType, cp.hdrChunk, obj));
4605 ok = (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp));
4607 if (ok && obj->variantType == YAFFS_OBJECT_TYPE_FILE)
4608 ok = yaffs_WriteCheckpointTnodes(obj);
4614 /* Dump end of list */
4615 memset(&cp, 0xFF, sizeof(yaffs_CheckpointObject));
4616 cp.structType = sizeof(cp);
4619 ok = (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp));
4624 static int yaffs_ReadCheckpointObjects(yaffs_Device *dev)
4627 yaffs_CheckpointObject cp;
4630 yaffs_Object *hardList = NULL;
4632 while (ok && !done) {
4633 ok = (yaffs_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp));
4634 if (cp.structType != sizeof(cp)) {
4635 T(YAFFS_TRACE_CHECKPOINT, (TSTR("struct size %d instead of %d ok %d"TENDSTR),
4636 cp.structType, (int)sizeof(cp), ok));
4640 T(YAFFS_TRACE_CHECKPOINT, (TSTR("Checkpoint read object %d parent %d type %d chunk %d " TENDSTR),
4641 cp.objectId, cp.parentId, cp.variantType, cp.hdrChunk));
4643 if (ok && cp.objectId == ~0)
4646 obj = yaffs_FindOrCreateObjectByNumber(dev, cp.objectId, cp.variantType);
4648 ok = yaffs_CheckpointObjectToObject(obj, &cp);
4651 if (obj->variantType == YAFFS_OBJECT_TYPE_FILE) {
4652 ok = yaffs_ReadCheckpointTnodes(obj);
4653 } else if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) {
4654 obj->hardLinks.next =
4655 (struct ylist_head *) hardList;
4664 yaffs_HardlinkFixup(dev, hardList);
4669 static int yaffs_WriteCheckpointSum(yaffs_Device *dev)
4671 __u32 checkpointSum;
4674 yaffs_GetCheckpointSum(dev, &checkpointSum);
4676 ok = (yaffs_CheckpointWrite(dev, &checkpointSum, sizeof(checkpointSum)) == sizeof(checkpointSum));
4684 static int yaffs_ReadCheckpointSum(yaffs_Device *dev)
4686 __u32 checkpointSum0;
4687 __u32 checkpointSum1;
4690 yaffs_GetCheckpointSum(dev, &checkpointSum0);
4692 ok = (yaffs_CheckpointRead(dev, &checkpointSum1, sizeof(checkpointSum1)) == sizeof(checkpointSum1));
4697 if (checkpointSum0 != checkpointSum1)
4704 static int yaffs_WriteCheckpointData(yaffs_Device *dev)
4708 if (dev->param.skipCheckpointWrite || !dev->param.isYaffs2) {
4709 T(YAFFS_TRACE_CHECKPOINT, (TSTR("skipping checkpoint write" TENDSTR)));
4714 ok = yaffs_CheckpointOpen(dev, 1);
4717 T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint validity" TENDSTR)));
4718 ok = yaffs_WriteCheckpointValidityMarker(dev, 1);
4721 T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint device" TENDSTR)));
4722 ok = yaffs_WriteCheckpointDevice(dev);
4725 T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint objects" TENDSTR)));
4726 ok = yaffs_WriteCheckpointObjects(dev);
4729 T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint validity" TENDSTR)));
4730 ok = yaffs_WriteCheckpointValidityMarker(dev, 0);
4734 ok = yaffs_WriteCheckpointSum(dev);
4736 if (!yaffs_CheckpointClose(dev))
4740 dev->isCheckpointed = 1;
4742 dev->isCheckpointed = 0;
4744 return dev->isCheckpointed;
4747 static int yaffs_ReadCheckpointData(yaffs_Device *dev)
4751 if (dev->param.skipCheckpointRead || !dev->param.isYaffs2) {
4752 T(YAFFS_TRACE_CHECKPOINT, (TSTR("skipping checkpoint read" TENDSTR)));
4757 ok = yaffs_CheckpointOpen(dev, 0); /* open for read */
4760 T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint validity" TENDSTR)));
4761 ok = yaffs_ReadCheckpointValidityMarker(dev, 1);
4764 T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint device" TENDSTR)));
4765 ok = yaffs_ReadCheckpointDevice(dev);
4768 T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint objects" TENDSTR)));
4769 ok = yaffs_ReadCheckpointObjects(dev);
4772 T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint validity" TENDSTR)));
4773 ok = yaffs_ReadCheckpointValidityMarker(dev, 0);
4777 ok = yaffs_ReadCheckpointSum(dev);
4778 T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint checksum %d" TENDSTR), ok));
4781 if (!yaffs_CheckpointClose(dev))
4785 dev->isCheckpointed = 1;
4787 dev->isCheckpointed = 0;
4793 static void yaffs_InvalidateCheckpoint(yaffs_Device *dev)
4795 if (dev->isCheckpointed ||
4796 dev->blocksInCheckpoint > 0) {
4797 dev->isCheckpointed = 0;
4798 yaffs_CheckpointInvalidateStream(dev);
4799 if (dev->param.markSuperBlockDirty)
4800 dev->param.markSuperBlockDirty(dev);
4805 int yaffs_CheckpointSave(yaffs_Device *dev)
4808 T(YAFFS_TRACE_CHECKPOINT, (TSTR("save entry: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
4810 yaffs_VerifyObjects(dev);
4811 yaffs_VerifyBlocks(dev);
4812 yaffs_VerifyFreeChunks(dev);
4814 if (!dev->isCheckpointed) {
4815 yaffs_InvalidateCheckpoint(dev);
4816 yaffs_WriteCheckpointData(dev);
4819 T(YAFFS_TRACE_ALWAYS, (TSTR("save exit: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
4821 return dev->isCheckpointed;
4824 int yaffs_CheckpointRestore(yaffs_Device *dev)
4827 T(YAFFS_TRACE_CHECKPOINT, (TSTR("restore entry: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
4829 retval = yaffs_ReadCheckpointData(dev);
4831 if (dev->isCheckpointed) {
4832 yaffs_VerifyObjects(dev);
4833 yaffs_VerifyBlocks(dev);
4834 yaffs_VerifyFreeChunks(dev);
4837 T(YAFFS_TRACE_CHECKPOINT, (TSTR("restore exit: isCheckpointed %d"TENDSTR), dev->isCheckpointed));
4842 /*--------------------- File read/write ------------------------
4843 * Read and write have very similar structures.
4844 * In general the read/write has three parts to it
4845 * An incomplete chunk to start with (if the read/write is not chunk-aligned)
4846 * Some complete chunks
4847 * An incomplete chunk to end off with
4849 * Curve-balls: the first chunk might also be the last chunk.
4852 int yaffs_ReadDataFromFile(yaffs_Object *in, __u8 *buffer, loff_t offset,
4861 yaffs_ChunkCache *cache;
4868 /* chunk = offset / dev->nDataBytesPerChunk + 1; */
4869 /* start = offset % dev->nDataBytesPerChunk; */
4870 yaffs_AddrToChunk(dev, offset, &chunk, &start);
4873 /* OK now check for the curveball where the start and end are in
4876 if ((start + n) < dev->nDataBytesPerChunk)
4879 nToCopy = dev->nDataBytesPerChunk - start;
4881 cache = yaffs_FindChunkCache(in, chunk);
4883 /* If the chunk is already in the cache or it is less than a whole chunk
4884 * or we're using inband tags then use the cache (if there is caching)
4885 * else bypass the cache.
4887 if (cache || nToCopy != dev->nDataBytesPerChunk || dev->param.inbandTags) {
4888 if (dev->param.nShortOpCaches > 0) {
4890 /* If we can't find the data in the cache, then load it up. */
4893 cache = yaffs_GrabChunkCache(in->myDev);
4895 cache->chunkId = chunk;
4898 yaffs_ReadChunkDataFromObject(in, chunk,
4904 yaffs_UseChunkCache(dev, cache, 0);
4909 memcpy(buffer, &cache->data[start], nToCopy);
4913 /* Read into the local buffer then copy..*/
4916 yaffs_GetTempBuffer(dev, __LINE__);
4917 yaffs_ReadChunkDataFromObject(in, chunk,
4920 memcpy(buffer, &localBuffer[start], nToCopy);
4923 yaffs_ReleaseTempBuffer(dev, localBuffer,
4929 /* A full chunk. Read directly into the supplied buffer. */
4930 yaffs_ReadChunkDataFromObject(in, chunk, buffer);
4944 int yaffs_WriteDataToFile(yaffs_Object *in, const __u8 *buffer, loff_t offset,
4945 int nBytes, int writeThrough)
4954 int startOfWrite = offset;
4955 int chunkWritten = 0;
4963 while (n > 0 && chunkWritten >= 0) {
4964 /* chunk = offset / dev->nDataBytesPerChunk + 1; */
4965 /* start = offset % dev->nDataBytesPerChunk; */
4966 yaffs_AddrToChunk(dev, offset, &chunk, &start);
4968 if (chunk * dev->nDataBytesPerChunk + start != offset ||
4969 start >= dev->nDataBytesPerChunk) {
4970 T(YAFFS_TRACE_ERROR, (
4971 TSTR("AddrToChunk of offset %d gives chunk %d start %d"
4973 (int)offset, chunk, start));
4977 /* OK now check for the curveball where the start and end are in
4981 if ((start + n) < dev->nDataBytesPerChunk) {
4984 /* Now folks, to calculate how many bytes to write back....
4985 * If we're overwriting and not writing to then end of file then
4986 * we need to write back as much as was there before.
4989 chunkStart = ((chunk - 1) * dev->nDataBytesPerChunk);
4991 if (chunkStart > in->variant.fileVariant.fileSize)
4992 nBytesRead = 0; /* Past end of file */
4994 nBytesRead = in->variant.fileVariant.fileSize - chunkStart;
4996 if (nBytesRead > dev->nDataBytesPerChunk)
4997 nBytesRead = dev->nDataBytesPerChunk;
5001 (start + n)) ? nBytesRead : (start + n);
5003 if (nToWriteBack < 0 || nToWriteBack > dev->nDataBytesPerChunk)
5007 nToCopy = dev->nDataBytesPerChunk - start;
5008 nToWriteBack = dev->nDataBytesPerChunk;
5011 if (nToCopy != dev->nDataBytesPerChunk || dev->param.inbandTags) {
5012 /* An incomplete start or end chunk (or maybe both start and end chunk),
5013 * or we're using inband tags, so we want to use the cache buffers.
5015 if (dev->param.nShortOpCaches > 0) {
5016 yaffs_ChunkCache *cache;
5017 /* If we can't find the data in the cache, then load the cache */
5018 cache = yaffs_FindChunkCache(in, chunk);
5021 && yaffs_CheckSpaceForAllocation(in->
5023 cache = yaffs_GrabChunkCache(in->myDev);
5025 cache->chunkId = chunk;
5028 yaffs_ReadChunkDataFromObject(in, chunk,
5033 !yaffs_CheckSpaceForAllocation(in->myDev)) {
5034 /* Drop the cache if it was a read cache item and
5035 * no space check has been made for it.
5041 yaffs_UseChunkCache(dev, cache, 1);
5045 memcpy(&cache->data[start], buffer,
5050 cache->nBytes = nToWriteBack;
5054 yaffs_WriteChunkDataToObject
5057 cache->data, cache->nBytes,
5063 chunkWritten = -1; /* fail the write */
5066 /* An incomplete start or end chunk (or maybe both start and end chunk)
5067 * Read into the local buffer then copy, then copy over and write back.
5071 yaffs_GetTempBuffer(dev, __LINE__);
5073 yaffs_ReadChunkDataFromObject(in, chunk,
5078 memcpy(&localBuffer[start], buffer, nToCopy);
5081 yaffs_WriteChunkDataToObject(in, chunk,
5086 yaffs_ReleaseTempBuffer(dev, localBuffer,
5092 /* A full chunk. Write directly from the supplied buffer. */
5097 yaffs_WriteChunkDataToObject(in, chunk, buffer,
5098 dev->nDataBytesPerChunk,
5101 /* Since we've overwritten the cached data, we better invalidate it. */
5102 yaffs_InvalidateChunkCache(in, chunk);
5105 if (chunkWritten >= 0) {
5114 /* Update file object */
5116 if ((startOfWrite + nDone) > in->variant.fileVariant.fileSize)
5117 in->variant.fileVariant.fileSize = (startOfWrite + nDone);
5125 /* ---------------------- File resizing stuff ------------------ */
5127 static void yaffs_PruneResizedChunks(yaffs_Object *in, int newSize)
5130 yaffs_Device *dev = in->myDev;
5131 int oldFileSize = in->variant.fileVariant.fileSize;
5133 int lastDel = 1 + (oldFileSize - 1) / dev->nDataBytesPerChunk;
5135 int startDel = 1 + (newSize + dev->nDataBytesPerChunk - 1) /
5136 dev->nDataBytesPerChunk;
5140 /* Delete backwards so that we don't end up with holes if
5141 * power is lost part-way through the operation.
5143 for (i = lastDel; i >= startDel; i--) {
5144 /* NB this could be optimised somewhat,
5145 * eg. could retrieve the tags and write them without
5146 * using yaffs_DeleteChunk
5149 chunkId = yaffs_FindAndDeleteChunkInFile(in, i, NULL);
5152 (dev->internalStartBlock * dev->param.nChunksPerBlock)
5154 ((dev->internalEndBlock +
5155 1) * dev->param.nChunksPerBlock)) {
5156 T(YAFFS_TRACE_ALWAYS,
5157 (TSTR("Found daft chunkId %d for %d" TENDSTR),
5161 yaffs_DeleteChunk(dev, chunkId, 1, __LINE__);
5168 int yaffs_ResizeFile(yaffs_Object *in, loff_t newSize)
5171 int oldFileSize = in->variant.fileVariant.fileSize;
5172 __u32 newSizeOfPartialChunk;
5175 yaffs_Device *dev = in->myDev;
5177 yaffs_AddrToChunk(dev, newSize, &newFullChunks, &newSizeOfPartialChunk);
5179 yaffs_FlushFilesChunkCache(in);
5180 yaffs_InvalidateWholeChunkCache(in);
5182 yaffs_CheckGarbageCollection(dev);
5184 if (in->variantType != YAFFS_OBJECT_TYPE_FILE)
5187 if (newSize == oldFileSize)
5190 if (newSize < oldFileSize) {
5192 yaffs_PruneResizedChunks(in, newSize);
5194 if (newSizeOfPartialChunk != 0) {
5195 int lastChunk = 1 + newFullChunks;
5197 __u8 *localBuffer = yaffs_GetTempBuffer(dev, __LINE__);
5199 /* Got to read and rewrite the last chunk with its new size and zero pad */
5200 yaffs_ReadChunkDataFromObject(in, lastChunk,
5203 memset(localBuffer + newSizeOfPartialChunk, 0,
5204 dev->nDataBytesPerChunk - newSizeOfPartialChunk);
5206 yaffs_WriteChunkDataToObject(in, lastChunk, localBuffer,
5207 newSizeOfPartialChunk, 1);
5209 yaffs_ReleaseTempBuffer(dev, localBuffer, __LINE__);
5212 in->variant.fileVariant.fileSize = newSize;
5214 yaffs_PruneFileStructure(dev, &in->variant.fileVariant);
5216 /* newsSize > oldFileSize */
5217 in->variant.fileVariant.fileSize = newSize;
5220 /* Write a new object header to reflect the resize.
5221 * show we've shrunk the file, if need be
5222 * Do this only if the file is not in the deleted directories
5223 * and is not shadowed.
5227 in->parent->objectId != YAFFS_OBJECTID_UNLINKED &&
5228 in->parent->objectId != YAFFS_OBJECTID_DELETED)
5229 yaffs_UpdateObjectHeader(in, NULL, 0,
5230 (newSize < oldFileSize) ? 1 : 0, 0);
5235 loff_t yaffs_GetFileSize(yaffs_Object *obj)
5237 YCHAR *alias = NULL;
5238 obj = yaffs_GetEquivalentObject(obj);
5240 switch (obj->variantType) {
5241 case YAFFS_OBJECT_TYPE_FILE:
5242 return obj->variant.fileVariant.fileSize;
5243 case YAFFS_OBJECT_TYPE_SYMLINK:
5244 alias = obj->variant.symLinkVariant.alias;
5247 return yaffs_strnlen(alias,YAFFS_MAX_ALIAS_LENGTH);
5255 int yaffs_FlushFile(yaffs_Object *in, int updateTime, int dataSync)
5259 yaffs_FlushFilesChunkCache(in);
5260 if(dataSync) /* Only sync data */
5264 #ifdef CONFIG_YAFFS_WINCE
5265 yfsd_WinFileTimeNow(in->win_mtime);
5268 in->yst_mtime = Y_CURRENT_TIME;
5273 retVal = (yaffs_UpdateObjectHeader(in, NULL, 0, 0, 0) >=
5274 0) ? YAFFS_OK : YAFFS_FAIL;
5284 static int yaffs_DoGenericObjectDeletion(yaffs_Object *in)
5287 /* First off, invalidate the file's data in the cache, without flushing. */
5288 yaffs_InvalidateWholeChunkCache(in);
5290 if (in->myDev->param.isYaffs2 && (in->parent != in->myDev->deletedDir)) {
5291 /* Move to the unlinked directory so we have a record that it was deleted. */
5292 yaffs_ChangeObjectName(in, in->myDev->deletedDir, _Y("deleted"), 0, 0);
5296 yaffs_RemoveObjectFromDirectory(in);
5297 yaffs_DeleteChunk(in->myDev, in->hdrChunk, 1, __LINE__);
5300 yaffs_FreeObject(in);
5305 /* yaffs_DeleteFile deletes the whole file data
5306 * and the inode associated with the file.
5307 * It does not delete the links associated with the file.
5309 static int yaffs_UnlinkFileIfNeeded(yaffs_Object *in)
5313 int immediateDeletion = 0;
5316 immediateDeletion = 1;
5318 if (immediateDeletion) {
5320 yaffs_ChangeObjectName(in, in->myDev->deletedDir,
5321 _Y("deleted"), 0, 0);
5322 T(YAFFS_TRACE_TRACING,
5323 (TSTR("yaffs: immediate deletion of file %d" TENDSTR),
5326 in->myDev->nDeletedFiles++;
5327 if (1 || in->myDev->param.isYaffs2)
5328 yaffs_ResizeFile(in, 0);
5329 yaffs_SoftDeleteFile(in);
5332 yaffs_ChangeObjectName(in, in->myDev->unlinkedDir,
5333 _Y("unlinked"), 0, 0);
5340 int yaffs_DeleteFile(yaffs_Object *in)
5342 int retVal = YAFFS_OK;
5343 int deleted = in->deleted;
5345 yaffs_ResizeFile(in, 0);
5347 if (in->nDataChunks > 0) {
5348 /* Use soft deletion if there is data in the file.
5349 * That won't be the case if it has been resized to zero.
5352 retVal = yaffs_UnlinkFileIfNeeded(in);
5354 if (retVal == YAFFS_OK && in->unlinked && !in->deleted) {
5357 in->myDev->nDeletedFiles++;
5358 yaffs_SoftDeleteFile(in);
5360 return deleted ? YAFFS_OK : YAFFS_FAIL;
5362 /* The file has no data chunks so we toss it immediately */
5363 yaffs_FreeTnode(in->myDev, in->variant.fileVariant.top);
5364 in->variant.fileVariant.top = NULL;
5365 yaffs_DoGenericObjectDeletion(in);
5371 static int yaffs_IsNonEmptyDirectory(yaffs_Object *obj)
5373 return (obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) &&
5374 !(ylist_empty(&obj->variant.directoryVariant.children));
5377 static int yaffs_DeleteDirectory(yaffs_Object *obj)
5379 /* First check that the directory is empty. */
5380 if (yaffs_IsNonEmptyDirectory(obj))
5383 return yaffs_DoGenericObjectDeletion(obj);
5386 static int yaffs_DeleteSymLink(yaffs_Object *in)
5388 if(in->variant.symLinkVariant.alias)
5389 YFREE(in->variant.symLinkVariant.alias);
5390 in->variant.symLinkVariant.alias=NULL;
5392 return yaffs_DoGenericObjectDeletion(in);
5395 static int yaffs_DeleteHardLink(yaffs_Object *in)
5397 /* remove this hardlink from the list assocaited with the equivalent
5400 ylist_del_init(&in->hardLinks);
5401 return yaffs_DoGenericObjectDeletion(in);
5404 int yaffs_DeleteObject(yaffs_Object *obj)
5407 switch (obj->variantType) {
5408 case YAFFS_OBJECT_TYPE_FILE:
5409 retVal = yaffs_DeleteFile(obj);
5411 case YAFFS_OBJECT_TYPE_DIRECTORY:
5412 return yaffs_DeleteDirectory(obj);
5414 case YAFFS_OBJECT_TYPE_SYMLINK:
5415 retVal = yaffs_DeleteSymLink(obj);
5417 case YAFFS_OBJECT_TYPE_HARDLINK:
5418 retVal = yaffs_DeleteHardLink(obj);
5420 case YAFFS_OBJECT_TYPE_SPECIAL:
5421 retVal = yaffs_DoGenericObjectDeletion(obj);
5423 case YAFFS_OBJECT_TYPE_UNKNOWN:
5425 break; /* should not happen. */
5431 static int yaffs_UnlinkWorker(yaffs_Object *obj)
5434 int immediateDeletion = 0;
5437 immediateDeletion = 1;
5440 yaffs_UpdateParent(obj->parent);
5442 if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) {
5443 return yaffs_DeleteHardLink(obj);
5444 } else if (!ylist_empty(&obj->hardLinks)) {
5445 /* Curve ball: We're unlinking an object that has a hardlink.
5447 * This problem arises because we are not strictly following
5448 * The Linux link/inode model.
5450 * We can't really delete the object.
5451 * Instead, we do the following:
5452 * - Select a hardlink.
5453 * - Unhook it from the hard links
5454 * - Move it from its parent directory (so that the rename can work)
5455 * - Rename the object to the hardlink's name.
5456 * - Delete the hardlink
5460 yaffs_Object *parent;
5462 YCHAR name[YAFFS_MAX_NAME_LENGTH + 1];
5464 hl = ylist_entry(obj->hardLinks.next, yaffs_Object, hardLinks);
5466 yaffs_GetObjectName(hl, name, YAFFS_MAX_NAME_LENGTH + 1);
5467 parent = hl->parent;
5469 ylist_del_init(&hl->hardLinks);
5471 yaffs_AddObjectToDirectory(obj->myDev->unlinkedDir, hl);
5473 retVal = yaffs_ChangeObjectName(obj,parent, name, 0, 0);
5475 if (retVal == YAFFS_OK)
5476 retVal = yaffs_DoGenericObjectDeletion(hl);
5480 } else if (immediateDeletion) {
5481 switch (obj->variantType) {
5482 case YAFFS_OBJECT_TYPE_FILE:
5483 return yaffs_DeleteFile(obj);
5485 case YAFFS_OBJECT_TYPE_DIRECTORY:
5486 return yaffs_DeleteDirectory(obj);
5488 case YAFFS_OBJECT_TYPE_SYMLINK:
5489 return yaffs_DeleteSymLink(obj);
5491 case YAFFS_OBJECT_TYPE_SPECIAL:
5492 return yaffs_DoGenericObjectDeletion(obj);
5494 case YAFFS_OBJECT_TYPE_HARDLINK:
5495 case YAFFS_OBJECT_TYPE_UNKNOWN:
5499 } else if(yaffs_IsNonEmptyDirectory(obj))
5502 return yaffs_ChangeObjectName(obj, obj->myDev->unlinkedDir,
5503 _Y("unlinked"), 0, 0);
5507 static int yaffs_UnlinkObject(yaffs_Object *obj)
5510 if (obj && obj->unlinkAllowed)
5511 return yaffs_UnlinkWorker(obj);
5516 int yaffs_Unlink(yaffs_Object *dir, const YCHAR *name)
5520 obj = yaffs_FindObjectByName(dir, name);
5521 return yaffs_UnlinkObject(obj);
5524 /*----------------------- Initialisation Scanning ---------------------- */
5526 static void yaffs_HandleShadowedObject(yaffs_Device *dev, int objId,
5527 int backwardScanning)
5531 if (!backwardScanning) {
5532 /* Handle YAFFS1 forward scanning case
5533 * For YAFFS1 we always do the deletion
5537 /* Handle YAFFS2 case (backward scanning)
5538 * If the shadowed object exists then ignore.
5540 obj = yaffs_FindObjectByNumber(dev, objId);
5545 /* Let's create it (if it does not exist) assuming it is a file so that it can do shrinking etc.
5546 * We put it in unlinked dir to be cleaned up after the scanning
5549 yaffs_FindOrCreateObjectByNumber(dev, objId,
5550 YAFFS_OBJECT_TYPE_FILE);
5553 obj->isShadowed = 1;
5554 yaffs_AddObjectToDirectory(dev->unlinkedDir, obj);
5555 obj->variant.fileVariant.shrinkSize = 0;
5556 obj->valid = 1; /* So that we don't read any other info for this file */
5566 static void yaffs_HardlinkFixup(yaffs_Device *dev, yaffs_Object *hardList)
5573 hardList = (yaffs_Object *) (hardList->hardLinks.next);
5575 in = yaffs_FindObjectByNumber(dev,
5576 hl->variant.hardLinkVariant.
5577 equivalentObjectId);
5580 /* Add the hardlink pointers */
5581 hl->variant.hardLinkVariant.equivalentObject = in;
5582 ylist_add(&hl->hardLinks, &in->hardLinks);
5584 /* Todo Need to report/handle this better.
5585 * Got a problem... hardlink to a non-existant object
5587 hl->variant.hardLinkVariant.equivalentObject = NULL;
5588 YINIT_LIST_HEAD(&hl->hardLinks);
5598 static int ybicmp(const void *a, const void *b)
5600 register int aseq = ((yaffs_BlockIndex *)a)->seq;
5601 register int bseq = ((yaffs_BlockIndex *)b)->seq;
5602 register int ablock = ((yaffs_BlockIndex *)a)->block;
5603 register int bblock = ((yaffs_BlockIndex *)b)->block;
5605 return ablock - bblock;
5611 struct yaffs_ShadowFixerStruct {
5614 struct yaffs_ShadowFixerStruct *next;
5618 static void yaffs_StripDeletedObjects(yaffs_Device *dev)
5621 * Sort out state of unlinked and deleted objects after scanning.
5623 struct ylist_head *i;
5624 struct ylist_head *n;
5627 /* Soft delete all the unlinked files */
5628 ylist_for_each_safe(i, n,
5629 &dev->unlinkedDir->variant.directoryVariant.children) {
5631 l = ylist_entry(i, yaffs_Object, siblings);
5632 yaffs_DeleteObject(l);
5636 ylist_for_each_safe(i, n,
5637 &dev->deletedDir->variant.directoryVariant.children) {
5639 l = ylist_entry(i, yaffs_Object, siblings);
5640 yaffs_DeleteObject(l);
5647 * This code iterates through all the objects making sure that they are rooted.
5648 * Any unrooted objects are re-rooted in lost+found.
5649 * An object needs to be in one of:
5650 * - Directly under deleted, unlinked
5651 * - Directly or indirectly under root.
5654 * This code assumes that we don't ever change the current relationships between
5656 * rootDir->parent == unlinkedDir->parent == deletedDir->parent == NULL
5657 * lostNfound->parent == rootDir
5659 * This fixes the problem where directories might have inadvertently been deleted
5660 * leaving the object "hanging" without being rooted in the directory tree.
5663 static int yaffs_HasNULLParent(yaffs_Device *dev, yaffs_Object *obj)
5665 return (obj == dev->deletedDir ||
5666 obj == dev->unlinkedDir||
5667 obj == dev->rootDir);
5670 static void yaffs_FixHangingObjects(yaffs_Device *dev)
5673 yaffs_Object *parent;
5675 struct ylist_head *lh;
5676 struct ylist_head *n;
5681 /* Iterate through the objects in each hash entry,
5682 * looking at each object.
5683 * Make sure it is rooted.
5686 for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) {
5687 ylist_for_each_safe(lh, n, &dev->objectBucket[i].list) {
5689 obj = ylist_entry(lh, yaffs_Object, hashLink);
5690 parent= obj->parent;
5692 if(yaffs_HasNULLParent(dev,obj)){
5693 /* These directories are not hanging */
5696 else if(!parent || parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
5698 else if(yaffs_HasNULLParent(dev,parent))
5702 * Need to follow the parent chain to see if it is hanging.
5707 while(parent != dev->rootDir &&
5709 parent->parent->variantType == YAFFS_OBJECT_TYPE_DIRECTORY &&
5711 parent = parent->parent;
5714 if(parent != dev->rootDir)
5719 (TSTR("Hanging object %d moved to lost and found" TENDSTR),
5721 yaffs_AddObjectToDirectory(dev->lostNFoundDir,obj);
5730 * Delete directory contents for cleaning up lost and found.
5732 static void yaffs_DeleteDirectoryContents(yaffs_Object *dir)
5735 struct ylist_head *lh;
5736 struct ylist_head *n;
5738 if(dir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
5741 ylist_for_each_safe(lh, n, &dir->variant.directoryVariant.children) {
5743 obj = ylist_entry(lh, yaffs_Object, siblings);
5744 if(obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY)
5745 yaffs_DeleteDirectoryContents(obj);
5748 (TSTR("Deleting lost_found object %d" TENDSTR),
5751 /* Need to use UnlinkObject since Delete would not handle
5752 * hardlinked objects correctly.
5754 yaffs_UnlinkObject(obj);
5760 static void yaffs_EmptyLostAndFound(yaffs_Device *dev)
5762 yaffs_DeleteDirectoryContents(dev->lostNFoundDir);
5765 static int yaffs_Scan(yaffs_Device *dev)
5767 yaffs_ExtendedTags tags;
5777 yaffs_BlockState state;
5778 yaffs_Object *hardList = NULL;
5779 yaffs_BlockInfo *bi;
5780 __u32 sequenceNumber;
5781 yaffs_ObjectHeader *oh;
5783 yaffs_Object *parent;
5785 int alloc_failed = 0;
5787 struct yaffs_ShadowFixerStruct *shadowFixerList = NULL;
5795 (TSTR("yaffs_Scan starts intstartblk %d intendblk %d..." TENDSTR),
5796 dev->internalStartBlock, dev->internalEndBlock));
5798 chunkData = yaffs_GetTempBuffer(dev, __LINE__);
5800 dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER;
5802 /* Scan all the blocks to determine their state */
5803 for (blk = dev->internalStartBlock; blk <= dev->internalEndBlock; blk++) {
5804 bi = yaffs_GetBlockInfo(dev, blk);
5805 yaffs_ClearChunkBits(dev, blk);
5807 bi->softDeletions = 0;
5809 yaffs_QueryInitialBlockState(dev, blk, &state, &sequenceNumber);
5811 bi->blockState = state;
5812 bi->sequenceNumber = sequenceNumber;
5814 if (bi->sequenceNumber == YAFFS_SEQUENCE_BAD_BLOCK)
5815 bi->blockState = state = YAFFS_BLOCK_STATE_DEAD;
5817 T(YAFFS_TRACE_SCAN_DEBUG,
5818 (TSTR("Block scanning block %d state %d seq %d" TENDSTR), blk,
5819 state, sequenceNumber));
5821 if (state == YAFFS_BLOCK_STATE_DEAD) {
5822 T(YAFFS_TRACE_BAD_BLOCKS,
5823 (TSTR("block %d is bad" TENDSTR), blk));
5824 } else if (state == YAFFS_BLOCK_STATE_EMPTY) {
5825 T(YAFFS_TRACE_SCAN_DEBUG,
5826 (TSTR("Block empty " TENDSTR)));
5827 dev->nErasedBlocks++;
5828 dev->nFreeChunks += dev->param.nChunksPerBlock;
5832 startIterator = dev->internalStartBlock;
5833 endIterator = dev->internalEndBlock;
5835 /* For each block.... */
5836 for (blockIterator = startIterator; !alloc_failed && blockIterator <= endIterator;
5843 blk = blockIterator;
5845 bi = yaffs_GetBlockInfo(dev, blk);
5846 state = bi->blockState;
5850 /* For each chunk in each block that needs scanning....*/
5851 for (c = 0; !alloc_failed && c < dev->param.nChunksPerBlock &&
5852 state == YAFFS_BLOCK_STATE_NEEDS_SCANNING; c++) {
5853 /* Read the tags and decide what to do */
5854 chunk = blk * dev->param.nChunksPerBlock + c;
5856 result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk, NULL,
5859 /* Let's have a good look at this chunk... */
5861 if (tags.eccResult == YAFFS_ECC_RESULT_UNFIXED || tags.chunkDeleted) {
5867 /*T((" %d %d deleted\n",blk,c)); */
5868 } else if (!tags.chunkUsed) {
5869 /* An unassigned chunk in the block
5870 * This means that either the block is empty or
5871 * this is the one being allocated from
5875 /* We're looking at the first chunk in the block so the block is unused */
5876 state = YAFFS_BLOCK_STATE_EMPTY;
5877 dev->nErasedBlocks++;
5879 /* this is the block being allocated from */
5882 (" Allocating from %d %d" TENDSTR),
5884 state = YAFFS_BLOCK_STATE_ALLOCATING;
5885 dev->allocationBlock = blk;
5886 dev->allocationPage = c;
5887 dev->allocationBlockFinder = blk;
5888 /* Set block finder here to encourage the allocator to go forth from here. */
5892 dev->nFreeChunks += (dev->param.nChunksPerBlock - c);
5893 } else if (tags.chunkId > 0) {
5894 /* chunkId > 0 so it is a data chunk... */
5895 unsigned int endpos;
5897 yaffs_SetChunkBit(dev, blk, c);
5900 in = yaffs_FindOrCreateObjectByNumber(dev,
5903 YAFFS_OBJECT_TYPE_FILE);
5904 /* PutChunkIntoFile checks for a clash (two data chunks with
5905 * the same chunkId).
5912 if (!yaffs_PutChunkIntoFile(in, tags.chunkId, chunk, 1))
5917 (tags.chunkId - 1) * dev->nDataBytesPerChunk +
5920 in->variantType == YAFFS_OBJECT_TYPE_FILE
5921 && in->variant.fileVariant.scannedFileSize <
5923 in->variant.fileVariant.
5924 scannedFileSize = endpos;
5925 if (!dev->param.useHeaderFileSize) {
5926 in->variant.fileVariant.
5928 in->variant.fileVariant.
5933 /* T((" %d %d data %d %d\n",blk,c,tags.objectId,tags.chunkId)); */
5935 /* chunkId == 0, so it is an ObjectHeader.
5936 * Thus, we read in the object header and make the object
5938 yaffs_SetChunkBit(dev, blk, c);
5941 result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk,
5945 oh = (yaffs_ObjectHeader *) chunkData;
5947 in = yaffs_FindObjectByNumber(dev,
5949 if (in && in->variantType != oh->type) {
5950 /* This should not happen, but somehow
5951 * Wev'e ended up with an objectId that has been reused but not yet
5952 * deleted, and worse still it has changed type. Delete the old object.
5955 yaffs_DeleteObject(in);
5960 in = yaffs_FindOrCreateObjectByNumber(dev,
5968 if (in && oh->shadowsObject > 0) {
5970 struct yaffs_ShadowFixerStruct *fixer;
5971 fixer = YMALLOC(sizeof(struct yaffs_ShadowFixerStruct));
5973 fixer->next = shadowFixerList;
5974 shadowFixerList = fixer;
5975 fixer->objectId = tags.objectId;
5976 fixer->shadowedId = oh->shadowsObject;
5981 if (in && in->valid) {
5982 /* We have already filled this one. We have a duplicate and need to resolve it. */
5984 unsigned existingSerial = in->serial;
5985 unsigned newSerial = tags.serialNumber;
5987 if (((existingSerial + 1) & 3) == newSerial) {
5988 /* Use new one - destroy the exisiting one */
5989 yaffs_DeleteChunk(dev,
5994 /* Use existing - destroy this one. */
5995 yaffs_DeleteChunk(dev, chunk, 1,
6000 if (in && !in->valid &&
6001 (tags.objectId == YAFFS_OBJECTID_ROOT ||
6002 tags.objectId == YAFFS_OBJECTID_LOSTNFOUND)) {
6003 /* We only load some info, don't fiddle with directory structure */
6005 in->variantType = oh->type;
6007 in->yst_mode = oh->yst_mode;
6008 #ifdef CONFIG_YAFFS_WINCE
6009 in->win_atime[0] = oh->win_atime[0];
6010 in->win_ctime[0] = oh->win_ctime[0];
6011 in->win_mtime[0] = oh->win_mtime[0];
6012 in->win_atime[1] = oh->win_atime[1];
6013 in->win_ctime[1] = oh->win_ctime[1];
6014 in->win_mtime[1] = oh->win_mtime[1];
6016 in->yst_uid = oh->yst_uid;
6017 in->yst_gid = oh->yst_gid;
6018 in->yst_atime = oh->yst_atime;
6019 in->yst_mtime = oh->yst_mtime;
6020 in->yst_ctime = oh->yst_ctime;
6021 in->yst_rdev = oh->yst_rdev;
6023 in->hdrChunk = chunk;
6024 in->serial = tags.serialNumber;
6026 } else if (in && !in->valid) {
6027 /* we need to load this info */
6030 in->variantType = oh->type;
6032 in->yst_mode = oh->yst_mode;
6033 #ifdef CONFIG_YAFFS_WINCE
6034 in->win_atime[0] = oh->win_atime[0];
6035 in->win_ctime[0] = oh->win_ctime[0];
6036 in->win_mtime[0] = oh->win_mtime[0];
6037 in->win_atime[1] = oh->win_atime[1];
6038 in->win_ctime[1] = oh->win_ctime[1];
6039 in->win_mtime[1] = oh->win_mtime[1];
6041 in->yst_uid = oh->yst_uid;
6042 in->yst_gid = oh->yst_gid;
6043 in->yst_atime = oh->yst_atime;
6044 in->yst_mtime = oh->yst_mtime;
6045 in->yst_ctime = oh->yst_ctime;
6046 in->yst_rdev = oh->yst_rdev;
6048 in->hdrChunk = chunk;
6049 in->serial = tags.serialNumber;
6051 yaffs_SetObjectName(in, oh->name);
6054 /* directory stuff...
6059 yaffs_FindOrCreateObjectByNumber
6060 (dev, oh->parentObjectId,
6061 YAFFS_OBJECT_TYPE_DIRECTORY);
6064 if (parent && parent->variantType ==
6065 YAFFS_OBJECT_TYPE_UNKNOWN) {
6066 /* Set up as a directory */
6067 parent->variantType =
6068 YAFFS_OBJECT_TYPE_DIRECTORY;
6069 YINIT_LIST_HEAD(&parent->variant.
6072 } else if (!parent || parent->variantType !=
6073 YAFFS_OBJECT_TYPE_DIRECTORY) {
6074 /* Hoosterman, another problem....
6075 * We're trying to use a non-directory as a directory
6078 T(YAFFS_TRACE_ERROR,
6080 ("yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found."
6082 parent = dev->lostNFoundDir;
6085 yaffs_AddObjectToDirectory(parent, in);
6087 if (0 && (parent == dev->deletedDir ||
6088 parent == dev->unlinkedDir)) {
6089 in->deleted = 1; /* If it is unlinked at start up then it wants deleting */
6090 dev->nDeletedFiles++;
6092 /* Note re hardlinks.
6093 * Since we might scan a hardlink before its equivalent object is scanned
6094 * we put them all in a list.
6095 * After scanning is complete, we should have all the objects, so we run through this
6096 * list and fix up all the chains.
6099 switch (in->variantType) {
6100 case YAFFS_OBJECT_TYPE_UNKNOWN:
6101 /* Todo got a problem */
6103 case YAFFS_OBJECT_TYPE_FILE:
6104 if (dev->param.useHeaderFileSize)
6106 in->variant.fileVariant.
6111 case YAFFS_OBJECT_TYPE_HARDLINK:
6112 in->variant.hardLinkVariant.
6113 equivalentObjectId =
6114 oh->equivalentObjectId;
6115 in->hardLinks.next =
6116 (struct ylist_head *)
6120 case YAFFS_OBJECT_TYPE_DIRECTORY:
6123 case YAFFS_OBJECT_TYPE_SPECIAL:
6126 case YAFFS_OBJECT_TYPE_SYMLINK:
6127 in->variant.symLinkVariant.alias =
6128 yaffs_CloneString(oh->alias);
6129 if (!in->variant.symLinkVariant.alias)
6138 if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
6139 /* If we got this far while scanning, then the block is fully allocated.*/
6140 state = YAFFS_BLOCK_STATE_FULL;
6143 if (state == YAFFS_BLOCK_STATE_ALLOCATING) {
6144 /* If the block was partially allocated then treat it as fully allocated.*/
6145 state = YAFFS_BLOCK_STATE_FULL;
6146 dev->allocationBlock = -1;
6149 bi->blockState = state;
6151 /* Now let's see if it was dirty */
6152 if (bi->pagesInUse == 0 &&
6153 !bi->hasShrinkHeader &&
6154 bi->blockState == YAFFS_BLOCK_STATE_FULL) {
6155 yaffs_BlockBecameDirty(dev, blk);
6161 /* Ok, we've done all the scanning.
6162 * Fix up the hard link chains.
6163 * We should now have scanned all the objects, now it's time to add these
6167 yaffs_HardlinkFixup(dev, hardList);
6169 /* Fix up any shadowed objects */
6171 struct yaffs_ShadowFixerStruct *fixer;
6174 while (shadowFixerList) {
6175 fixer = shadowFixerList;
6176 shadowFixerList = fixer->next;
6177 /* Complete the rename transaction by deleting the shadowed object
6178 * then setting the object header to unshadowed.
6180 obj = yaffs_FindObjectByNumber(dev, fixer->shadowedId);
6182 yaffs_DeleteObject(obj);
6184 obj = yaffs_FindObjectByNumber(dev, fixer->objectId);
6187 yaffs_UpdateObjectHeader(obj, NULL, 1, 0, 0);
6193 yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
6198 T(YAFFS_TRACE_SCAN, (TSTR("yaffs_Scan ends" TENDSTR)));
6204 static void yaffs_CheckObjectDetailsLoaded(yaffs_Object *in)
6207 yaffs_ObjectHeader *oh;
6209 yaffs_ExtendedTags tags;
6211 int alloc_failed = 0;
6219 T(YAFFS_TRACE_SCAN, (TSTR("details for object %d %s loaded" TENDSTR),
6221 in->lazyLoaded ? "not yet" : "already"));
6224 if (in->lazyLoaded && in->hdrChunk > 0) {
6226 chunkData = yaffs_GetTempBuffer(dev, __LINE__);
6228 result = yaffs_ReadChunkWithTagsFromNAND(dev, in->hdrChunk, chunkData, &tags);
6229 oh = (yaffs_ObjectHeader *) chunkData;
6231 in->yst_mode = oh->yst_mode;
6232 #ifdef CONFIG_YAFFS_WINCE
6233 in->win_atime[0] = oh->win_atime[0];
6234 in->win_ctime[0] = oh->win_ctime[0];
6235 in->win_mtime[0] = oh->win_mtime[0];
6236 in->win_atime[1] = oh->win_atime[1];
6237 in->win_ctime[1] = oh->win_ctime[1];
6238 in->win_mtime[1] = oh->win_mtime[1];
6240 in->yst_uid = oh->yst_uid;
6241 in->yst_gid = oh->yst_gid;
6242 in->yst_atime = oh->yst_atime;
6243 in->yst_mtime = oh->yst_mtime;
6244 in->yst_ctime = oh->yst_ctime;
6245 in->yst_rdev = oh->yst_rdev;
6248 yaffs_SetObjectName(in, oh->name);
6250 if (in->variantType == YAFFS_OBJECT_TYPE_SYMLINK) {
6251 in->variant.symLinkVariant.alias =
6252 yaffs_CloneString(oh->alias);
6253 if (!in->variant.symLinkVariant.alias)
6254 alloc_failed = 1; /* Not returned to caller */
6257 yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
6261 static int yaffs_ScanBackwards(yaffs_Device *dev)
6263 yaffs_ExtendedTags tags;
6268 int nBlocksToScan = 0;
6274 yaffs_BlockState state;
6275 yaffs_Object *hardList = NULL;
6276 yaffs_BlockInfo *bi;
6277 __u32 sequenceNumber;
6278 yaffs_ObjectHeader *oh;
6280 yaffs_Object *parent;
6281 int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1;
6287 int foundChunksInBlock;
6288 int equivalentObjectId;
6289 int alloc_failed = 0;
6292 yaffs_BlockIndex *blockIndex = NULL;
6293 int altBlockIndex = 0;
6295 if (!dev->param.isYaffs2) {
6297 (TSTR("yaffs_ScanBackwards is only for YAFFS2!" TENDSTR)));
6303 ("yaffs_ScanBackwards starts intstartblk %d intendblk %d..."
6304 TENDSTR), dev->internalStartBlock, dev->internalEndBlock));
6307 dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER;
6309 blockIndex = YMALLOC(nBlocks * sizeof(yaffs_BlockIndex));
6312 blockIndex = YMALLOC_ALT(nBlocks * sizeof(yaffs_BlockIndex));
6318 (TSTR("yaffs_Scan() could not allocate block index!" TENDSTR)));
6322 dev->blocksInCheckpoint = 0;
6324 chunkData = yaffs_GetTempBuffer(dev, __LINE__);
6326 /* Scan all the blocks to determine their state */
6327 for (blk = dev->internalStartBlock; blk <= dev->internalEndBlock; blk++) {
6328 bi = yaffs_GetBlockInfo(dev, blk);
6329 yaffs_ClearChunkBits(dev, blk);
6331 bi->softDeletions = 0;
6333 yaffs_QueryInitialBlockState(dev, blk, &state, &sequenceNumber);
6335 bi->blockState = state;
6336 bi->sequenceNumber = sequenceNumber;
6338 if (bi->sequenceNumber == YAFFS_SEQUENCE_CHECKPOINT_DATA)
6339 bi->blockState = state = YAFFS_BLOCK_STATE_CHECKPOINT;
6340 if (bi->sequenceNumber == YAFFS_SEQUENCE_BAD_BLOCK)
6341 bi->blockState = state = YAFFS_BLOCK_STATE_DEAD;
6343 T(YAFFS_TRACE_SCAN_DEBUG,
6344 (TSTR("Block scanning block %d state %d seq %d" TENDSTR), blk,
6345 state, sequenceNumber));
6348 if (state == YAFFS_BLOCK_STATE_CHECKPOINT) {
6349 dev->blocksInCheckpoint++;
6351 } else if (state == YAFFS_BLOCK_STATE_DEAD) {
6352 T(YAFFS_TRACE_BAD_BLOCKS,
6353 (TSTR("block %d is bad" TENDSTR), blk));
6354 } else if (state == YAFFS_BLOCK_STATE_EMPTY) {
6355 T(YAFFS_TRACE_SCAN_DEBUG,
6356 (TSTR("Block empty " TENDSTR)));
6357 dev->nErasedBlocks++;
6358 dev->nFreeChunks += dev->param.nChunksPerBlock;
6359 } else if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
6361 /* Determine the highest sequence number */
6362 if (sequenceNumber >= YAFFS_LOWEST_SEQUENCE_NUMBER &&
6363 sequenceNumber < YAFFS_HIGHEST_SEQUENCE_NUMBER) {
6365 blockIndex[nBlocksToScan].seq = sequenceNumber;
6366 blockIndex[nBlocksToScan].block = blk;
6370 if (sequenceNumber >= dev->sequenceNumber)
6371 dev->sequenceNumber = sequenceNumber;
6373 /* TODO: Nasty sequence number! */
6376 ("Block scanning block %d has bad sequence number %d"
6377 TENDSTR), blk, sequenceNumber));
6384 (TSTR("%d blocks to be sorted..." TENDSTR), nBlocksToScan));
6390 /* Sort the blocks */
6391 #ifndef CONFIG_YAFFS_USE_OWN_SORT
6393 /* Use qsort now. */
6394 yaffs_qsort(blockIndex, nBlocksToScan, sizeof(yaffs_BlockIndex), ybicmp);
6398 /* Dungy old bubble sort... */
6400 yaffs_BlockIndex temp;
6404 for (i = 0; i < nBlocksToScan; i++)
6405 for (j = i + 1; j < nBlocksToScan; j++)
6406 if (blockIndex[i].seq > blockIndex[j].seq) {
6407 temp = blockIndex[j];
6408 blockIndex[j] = blockIndex[i];
6409 blockIndex[i] = temp;
6416 T(YAFFS_TRACE_SCAN, (TSTR("...done" TENDSTR)));
6418 /* Now scan the blocks looking at the data. */
6420 endIterator = nBlocksToScan - 1;
6421 T(YAFFS_TRACE_SCAN_DEBUG,
6422 (TSTR("%d blocks to be scanned" TENDSTR), nBlocksToScan));
6424 /* For each block.... backwards */
6425 for (blockIterator = endIterator; !alloc_failed && blockIterator >= startIterator;
6427 /* Cooperative multitasking! This loop can run for so
6428 long that watchdog timers expire. */
6431 /* get the block to scan in the correct order */
6432 blk = blockIndex[blockIterator].block;
6434 bi = yaffs_GetBlockInfo(dev, blk);
6437 state = bi->blockState;
6441 /* For each chunk in each block that needs scanning.... */
6442 foundChunksInBlock = 0;
6443 for (c = dev->param.nChunksPerBlock - 1;
6444 !alloc_failed && c >= 0 &&
6445 (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
6446 state == YAFFS_BLOCK_STATE_ALLOCATING); c--) {
6447 /* Scan backwards...
6448 * Read the tags and decide what to do
6451 chunk = blk * dev->param.nChunksPerBlock + c;
6453 result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk, NULL,
6456 /* Let's have a good look at this chunk... */
6458 if (!tags.chunkUsed) {
6459 /* An unassigned chunk in the block.
6460 * If there are used chunks after this one, then
6461 * it is a chunk that was skipped due to failing the erased
6462 * check. Just skip it so that it can be deleted.
6463 * But, more typically, We get here when this is an unallocated
6464 * chunk and his means that either the block is empty or
6465 * this is the one being allocated from
6468 if (foundChunksInBlock) {
6469 /* This is a chunk that was skipped due to failing the erased check */
6470 } else if (c == 0) {
6471 /* We're looking at the first chunk in the block so the block is unused */
6472 state = YAFFS_BLOCK_STATE_EMPTY;
6473 dev->nErasedBlocks++;
6475 if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
6476 state == YAFFS_BLOCK_STATE_ALLOCATING) {
6477 if (dev->sequenceNumber == bi->sequenceNumber) {
6478 /* this is the block being allocated from */
6482 (" Allocating from %d %d"
6485 state = YAFFS_BLOCK_STATE_ALLOCATING;
6486 dev->allocationBlock = blk;
6487 dev->allocationPage = c;
6488 dev->allocationBlockFinder = blk;
6490 /* This is a partially written block that is not
6491 * the current allocation block.
6494 T(YAFFS_TRACE_ALWAYS,
6495 (TSTR("Partially written block %d detected" TENDSTR),
6503 } else if (tags.eccResult == YAFFS_ECC_RESULT_UNFIXED) {
6505 (TSTR(" Unfixed ECC in chunk(%d:%d), chunk ignored"TENDSTR),
6510 } else if (tags.chunkId > 0) {
6511 /* chunkId > 0 so it is a data chunk... */
6512 unsigned int endpos;
6514 (tags.chunkId - 1) * dev->nDataBytesPerChunk;
6516 foundChunksInBlock = 1;
6519 yaffs_SetChunkBit(dev, blk, c);
6522 in = yaffs_FindOrCreateObjectByNumber(dev,
6525 YAFFS_OBJECT_TYPE_FILE);
6532 in->variantType == YAFFS_OBJECT_TYPE_FILE
6533 && chunkBase < in->variant.fileVariant.shrinkSize) {
6534 /* This has not been invalidated by a resize */
6535 if (!yaffs_PutChunkIntoFile(in, tags.chunkId, chunk, -1)) {
6539 /* File size is calculated by looking at the data chunks if we have not
6540 * seen an object header yet. Stop this practice once we find an object header.
6542 endpos = chunkBase + tags.byteCount;
6544 if (!in->valid && /* have not got an object header yet */
6545 in->variant.fileVariant.scannedFileSize < endpos) {
6546 in->variant.fileVariant.scannedFileSize = endpos;
6547 in->variant.fileVariant.fileSize = endpos;
6551 /* This chunk has been invalidated by a resize, or a past file deletion
6552 * so delete the chunk*/
6553 yaffs_DeleteChunk(dev, chunk, 1, __LINE__);
6557 /* chunkId == 0, so it is an ObjectHeader.
6558 * Thus, we read in the object header and make the object
6560 foundChunksInBlock = 1;
6562 yaffs_SetChunkBit(dev, blk, c);
6568 if (tags.extraHeaderInfoAvailable) {
6569 in = yaffs_FindOrCreateObjectByNumber(dev,
6571 tags.extraObjectType);
6577 (!in->valid && dev->param.disableLazyLoad) ||
6578 tags.extraShadows ||
6580 (tags.objectId == YAFFS_OBJECTID_ROOT ||
6581 tags.objectId == YAFFS_OBJECTID_LOSTNFOUND))) {
6583 /* If we don't have valid info then we need to read the chunk
6584 * TODO In future we can probably defer reading the chunk and
6585 * living with invalid data until needed.
6588 result = yaffs_ReadChunkWithTagsFromNAND(dev,
6593 oh = (yaffs_ObjectHeader *) chunkData;
6595 if (dev->param.inbandTags) {
6596 /* Fix up the header if they got corrupted by inband tags */
6597 oh->shadowsObject = oh->inbandShadowsObject;
6598 oh->isShrink = oh->inbandIsShrink;
6602 in = yaffs_FindOrCreateObjectByNumber(dev, tags.objectId, oh->type);
6610 /* TODO Hoosterman we have a problem! */
6611 T(YAFFS_TRACE_ERROR,
6613 ("yaffs tragedy: Could not make object for object %d at chunk %d during scan"
6614 TENDSTR), tags.objectId, chunk));
6619 /* We have already filled this one.
6620 * We have a duplicate that will be discarded, but
6621 * we first have to suck out resize info if it is a file.
6624 if ((in->variantType == YAFFS_OBJECT_TYPE_FILE) &&
6626 oh->type == YAFFS_OBJECT_TYPE_FILE) ||
6627 (tags.extraHeaderInfoAvailable &&
6628 tags.extraObjectType == YAFFS_OBJECT_TYPE_FILE))) {
6630 (oh) ? oh->fileSize : tags.
6632 __u32 parentObjectId =
6634 parentObjectId : tags.
6635 extraParentObjectId;
6639 (oh) ? oh->isShrink : tags.
6640 extraIsShrinkHeader;
6642 /* If it is deleted (unlinked at start also means deleted)
6643 * we treat the file size as being zeroed at this point.
6645 if (parentObjectId ==
6646 YAFFS_OBJECTID_DELETED
6647 || parentObjectId ==
6648 YAFFS_OBJECTID_UNLINKED) {
6653 if (isShrink && in->variant.fileVariant.shrinkSize > thisSize)
6654 in->variant.fileVariant.shrinkSize = thisSize;
6657 bi->hasShrinkHeader = 1;
6660 /* Use existing - destroy this one. */
6661 yaffs_DeleteChunk(dev, chunk, 1, __LINE__);
6665 if (!in->valid && in->variantType !=
6666 (oh ? oh->type : tags.extraObjectType))
6667 T(YAFFS_TRACE_ERROR, (
6668 TSTR("yaffs tragedy: Bad object type, "
6669 TCONT("%d != %d, for object %d at chunk ")
6670 TCONT("%d during scan")
6672 oh->type : tags.extraObjectType,
6673 in->variantType, tags.objectId,
6677 (tags.objectId == YAFFS_OBJECTID_ROOT ||
6679 YAFFS_OBJECTID_LOSTNFOUND)) {
6680 /* We only load some info, don't fiddle with directory structure */
6684 in->variantType = oh->type;
6686 in->yst_mode = oh->yst_mode;
6687 #ifdef CONFIG_YAFFS_WINCE
6688 in->win_atime[0] = oh->win_atime[0];
6689 in->win_ctime[0] = oh->win_ctime[0];
6690 in->win_mtime[0] = oh->win_mtime[0];
6691 in->win_atime[1] = oh->win_atime[1];
6692 in->win_ctime[1] = oh->win_ctime[1];
6693 in->win_mtime[1] = oh->win_mtime[1];
6695 in->yst_uid = oh->yst_uid;
6696 in->yst_gid = oh->yst_gid;
6697 in->yst_atime = oh->yst_atime;
6698 in->yst_mtime = oh->yst_mtime;
6699 in->yst_ctime = oh->yst_ctime;
6700 in->yst_rdev = oh->yst_rdev;
6704 in->variantType = tags.extraObjectType;
6708 in->hdrChunk = chunk;
6710 } else if (!in->valid) {
6711 /* we need to load this info */
6714 in->hdrChunk = chunk;
6717 in->variantType = oh->type;
6719 in->yst_mode = oh->yst_mode;
6720 #ifdef CONFIG_YAFFS_WINCE
6721 in->win_atime[0] = oh->win_atime[0];
6722 in->win_ctime[0] = oh->win_ctime[0];
6723 in->win_mtime[0] = oh->win_mtime[0];
6724 in->win_atime[1] = oh->win_atime[1];
6725 in->win_ctime[1] = oh->win_ctime[1];
6726 in->win_mtime[1] = oh->win_mtime[1];
6728 in->yst_uid = oh->yst_uid;
6729 in->yst_gid = oh->yst_gid;
6730 in->yst_atime = oh->yst_atime;
6731 in->yst_mtime = oh->yst_mtime;
6732 in->yst_ctime = oh->yst_ctime;
6733 in->yst_rdev = oh->yst_rdev;
6736 if (oh->shadowsObject > 0)
6737 yaffs_HandleShadowedObject(dev,
6744 yaffs_SetObjectName(in, oh->name);
6746 yaffs_FindOrCreateObjectByNumber
6747 (dev, oh->parentObjectId,
6748 YAFFS_OBJECT_TYPE_DIRECTORY);
6750 fileSize = oh->fileSize;
6751 isShrink = oh->isShrink;
6752 equivalentObjectId = oh->equivalentObjectId;
6755 in->variantType = tags.extraObjectType;
6757 yaffs_FindOrCreateObjectByNumber
6758 (dev, tags.extraParentObjectId,
6759 YAFFS_OBJECT_TYPE_DIRECTORY);
6760 fileSize = tags.extraFileLength;
6761 isShrink = tags.extraIsShrinkHeader;
6762 equivalentObjectId = tags.extraEquivalentObjectId;
6771 /* directory stuff...
6775 if (parent && parent->variantType ==
6776 YAFFS_OBJECT_TYPE_UNKNOWN) {
6777 /* Set up as a directory */
6778 parent->variantType =
6779 YAFFS_OBJECT_TYPE_DIRECTORY;
6780 YINIT_LIST_HEAD(&parent->variant.
6783 } else if (!parent || parent->variantType !=
6784 YAFFS_OBJECT_TYPE_DIRECTORY) {
6785 /* Hoosterman, another problem....
6786 * We're trying to use a non-directory as a directory
6789 T(YAFFS_TRACE_ERROR,
6791 ("yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found."
6793 parent = dev->lostNFoundDir;
6796 yaffs_AddObjectToDirectory(parent, in);
6798 itsUnlinked = (parent == dev->deletedDir) ||
6799 (parent == dev->unlinkedDir);
6802 /* Mark the block as having a shrinkHeader */
6803 bi->hasShrinkHeader = 1;
6806 /* Note re hardlinks.
6807 * Since we might scan a hardlink before its equivalent object is scanned
6808 * we put them all in a list.
6809 * After scanning is complete, we should have all the objects, so we run
6810 * through this list and fix up all the chains.
6813 switch (in->variantType) {
6814 case YAFFS_OBJECT_TYPE_UNKNOWN:
6815 /* Todo got a problem */
6817 case YAFFS_OBJECT_TYPE_FILE:
6819 if (in->variant.fileVariant.
6820 scannedFileSize < fileSize) {
6821 /* This covers the case where the file size is greater
6822 * than where the data is
6823 * This will happen if the file is resized to be larger
6824 * than its current data extents.
6826 in->variant.fileVariant.fileSize = fileSize;
6827 in->variant.fileVariant.scannedFileSize = fileSize;
6830 if (in->variant.fileVariant.shrinkSize > fileSize)
6831 in->variant.fileVariant.shrinkSize = fileSize;
6835 case YAFFS_OBJECT_TYPE_HARDLINK:
6837 in->variant.hardLinkVariant.equivalentObjectId =
6839 in->hardLinks.next =
6840 (struct ylist_head *) hardList;
6844 case YAFFS_OBJECT_TYPE_DIRECTORY:
6847 case YAFFS_OBJECT_TYPE_SPECIAL:
6850 case YAFFS_OBJECT_TYPE_SYMLINK:
6852 in->variant.symLinkVariant.alias =
6853 yaffs_CloneString(oh->alias);
6854 if (!in->variant.symLinkVariant.alias)
6864 } /* End of scanning for each chunk */
6866 if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
6867 /* If we got this far while scanning, then the block is fully allocated. */
6868 state = YAFFS_BLOCK_STATE_FULL;
6872 bi->blockState = state;
6874 /* Now let's see if it was dirty */
6875 if (bi->pagesInUse == 0 &&
6876 !bi->hasShrinkHeader &&
6877 bi->blockState == YAFFS_BLOCK_STATE_FULL) {
6878 yaffs_BlockBecameDirty(dev, blk);
6883 yaffs_SkipRestOfBlock(dev);
6886 YFREE_ALT(blockIndex);
6890 /* Ok, we've done all the scanning.
6891 * Fix up the hard link chains.
6892 * We should now have scanned all the objects, now it's time to add these
6895 yaffs_HardlinkFixup(dev, hardList);
6898 yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__);
6903 T(YAFFS_TRACE_SCAN, (TSTR("yaffs_ScanBackwards ends" TENDSTR)));
6908 /*------------------------------ Directory Functions ----------------------------- */
6910 static void yaffs_VerifyObjectInDirectory(yaffs_Object *obj)
6912 struct ylist_head *lh;
6913 yaffs_Object *listObj;
6918 T(YAFFS_TRACE_ALWAYS, (TSTR("No object to verify" TENDSTR)));
6923 if (yaffs_SkipVerification(obj->myDev))
6927 T(YAFFS_TRACE_ALWAYS, (TSTR("Object does not have parent" TENDSTR)));
6932 if (obj->parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
6933 T(YAFFS_TRACE_ALWAYS, (TSTR("Parent is not directory" TENDSTR)));
6937 /* Iterate through the objects in each hash entry */
6939 ylist_for_each(lh, &obj->parent->variant.directoryVariant.children) {
6941 listObj = ylist_entry(lh, yaffs_Object, siblings);
6942 yaffs_VerifyObject(listObj);
6949 T(YAFFS_TRACE_ALWAYS, (TSTR("Object in directory %d times" TENDSTR), count));
6954 static void yaffs_VerifyDirectory(yaffs_Object *directory)
6956 struct ylist_head *lh;
6957 yaffs_Object *listObj;
6964 if (yaffs_SkipFullVerification(directory->myDev))
6967 if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
6968 T(YAFFS_TRACE_ALWAYS, (TSTR("Directory has wrong type: %d" TENDSTR), directory->variantType));
6972 /* Iterate through the objects in each hash entry */
6974 ylist_for_each(lh, &directory->variant.directoryVariant.children) {
6976 listObj = ylist_entry(lh, yaffs_Object, siblings);
6977 if (listObj->parent != directory) {
6978 T(YAFFS_TRACE_ALWAYS, (TSTR("Object in directory list has wrong parent %p" TENDSTR), listObj->parent));
6981 yaffs_VerifyObjectInDirectory(listObj);
6987 *yaffs_UpdateParent() handles fixing a directories mtime and ctime when a new
6988 * link (ie. name) is created or deleted in the directory.
6991 * create dir/a : update dir's mtime/ctime
6992 * rm dir/a: update dir's mtime/ctime
6993 * modify dir/a: don't update dir's mtimme/ctime
6996 static void yaffs_UpdateParent(yaffs_Object *obj)
7002 obj->yst_mtime = obj->yst_ctime = Y_CURRENT_TIME;
7004 yaffs_UpdateObjectHeader(obj,NULL,0,0,0);
7007 static void yaffs_RemoveObjectFromDirectory(yaffs_Object *obj)
7009 yaffs_Device *dev = obj->myDev;
7010 yaffs_Object *parent;
7012 yaffs_VerifyObjectInDirectory(obj);
7013 parent = obj->parent;
7015 yaffs_VerifyDirectory(parent);
7017 if (dev && dev->param.removeObjectCallback)
7018 dev->param.removeObjectCallback(obj);
7021 ylist_del_init(&obj->siblings);
7024 yaffs_VerifyDirectory(parent);
7027 static void yaffs_AddObjectToDirectory(yaffs_Object *directory,
7031 T(YAFFS_TRACE_ALWAYS,
7033 ("tragedy: Trying to add an object to a null pointer directory"
7038 if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
7039 T(YAFFS_TRACE_ALWAYS,
7041 ("tragedy: Trying to add an object to a non-directory"
7046 if (obj->siblings.prev == NULL) {
7047 /* Not initialised */
7052 yaffs_VerifyDirectory(directory);
7054 yaffs_RemoveObjectFromDirectory(obj);
7058 ylist_add(&obj->siblings, &directory->variant.directoryVariant.children);
7059 obj->parent = directory;
7061 if (directory == obj->myDev->unlinkedDir
7062 || directory == obj->myDev->deletedDir) {
7064 obj->myDev->nUnlinkedFiles++;
7065 obj->renameAllowed = 0;
7068 yaffs_VerifyDirectory(directory);
7069 yaffs_VerifyObjectInDirectory(obj);
7072 yaffs_Object *yaffs_FindObjectByName(yaffs_Object *directory,
7077 struct ylist_head *i;
7078 YCHAR buffer[YAFFS_MAX_NAME_LENGTH + 1];
7086 T(YAFFS_TRACE_ALWAYS,
7088 ("tragedy: yaffs_FindObjectByName: null pointer directory"
7093 if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
7094 T(YAFFS_TRACE_ALWAYS,
7096 ("tragedy: yaffs_FindObjectByName: non-directory" TENDSTR)));
7100 sum = yaffs_CalcNameSum(name);
7102 ylist_for_each(i, &directory->variant.directoryVariant.children) {
7104 l = ylist_entry(i, yaffs_Object, siblings);
7106 if (l->parent != directory)
7109 yaffs_CheckObjectDetailsLoaded(l);
7111 /* Special case for lost-n-found */
7112 if (l->objectId == YAFFS_OBJECTID_LOSTNFOUND) {
7113 if (yaffs_strcmp(name, YAFFS_LOSTNFOUND_NAME) == 0)
7115 } else if (yaffs_SumCompare(l->sum, sum) || l->hdrChunk <= 0) {
7116 /* LostnFound chunk called Objxxx
7119 yaffs_GetObjectName(l, buffer,
7120 YAFFS_MAX_NAME_LENGTH + 1);
7121 if (yaffs_strncmp(name, buffer, YAFFS_MAX_NAME_LENGTH) == 0)
7132 int yaffs_ApplyToDirectoryChildren(yaffs_Object *theDir,
7133 int (*fn) (yaffs_Object *))
7135 struct ylist_head *i;
7139 T(YAFFS_TRACE_ALWAYS,
7141 ("tragedy: yaffs_FindObjectByName: null pointer directory"
7146 if (theDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) {
7147 T(YAFFS_TRACE_ALWAYS,
7149 ("tragedy: yaffs_FindObjectByName: non-directory" TENDSTR)));
7154 ylist_for_each(i, &theDir->variant.directoryVariant.children) {
7156 l = ylist_entry(i, yaffs_Object, siblings);
7167 /* GetEquivalentObject dereferences any hard links to get to the
7171 yaffs_Object *yaffs_GetEquivalentObject(yaffs_Object *obj)
7173 if (obj && obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) {
7174 /* We want the object id of the equivalent object, not this one */
7175 obj = obj->variant.hardLinkVariant.equivalentObject;
7176 yaffs_CheckObjectDetailsLoaded(obj);
7181 int yaffs_GetObjectName(yaffs_Object *obj, YCHAR *name, int buffSize)
7183 memset(name, 0, buffSize * sizeof(YCHAR));
7185 yaffs_CheckObjectDetailsLoaded(obj);
7187 if (obj->objectId == YAFFS_OBJECTID_LOSTNFOUND) {
7188 yaffs_strncpy(name, YAFFS_LOSTNFOUND_NAME, buffSize - 1);
7189 } else if (obj->hdrChunk <= 0) {
7191 YCHAR numString[20];
7192 YCHAR *x = &numString[19];
7193 unsigned v = obj->objectId;
7197 *x = '0' + (v % 10);
7200 /* make up a name */
7201 yaffs_strcpy(locName, YAFFS_LOSTNFOUND_PREFIX);
7202 yaffs_strcat(locName, x);
7203 yaffs_strncpy(name, locName, buffSize - 1);
7206 #ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM
7207 else if (obj->shortName[0])
7208 yaffs_strncpy(name, obj->shortName,YAFFS_SHORT_NAME_LENGTH+1);
7212 __u8 *buffer = yaffs_GetTempBuffer(obj->myDev, __LINE__);
7214 yaffs_ObjectHeader *oh = (yaffs_ObjectHeader *) buffer;
7216 memset(buffer, 0, obj->myDev->nDataBytesPerChunk);
7218 if (obj->hdrChunk > 0) {
7219 result = yaffs_ReadChunkWithTagsFromNAND(obj->myDev,
7220 obj->hdrChunk, buffer,
7223 yaffs_strncpy(name, oh->name, buffSize - 1);
7226 yaffs_ReleaseTempBuffer(obj->myDev, buffer, __LINE__);
7229 return yaffs_strnlen(name,buffSize-1);
7232 int yaffs_GetObjectFileLength(yaffs_Object *obj)
7234 /* Dereference any hard linking */
7235 obj = yaffs_GetEquivalentObject(obj);
7237 if (obj->variantType == YAFFS_OBJECT_TYPE_FILE)
7238 return obj->variant.fileVariant.fileSize;
7239 if (obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK){
7240 if(!obj->variant.symLinkVariant.alias)
7242 return yaffs_strnlen(obj->variant.symLinkVariant.alias,YAFFS_MAX_ALIAS_LENGTH);
7244 /* Only a directory should drop through to here */
7245 return obj->myDev->nDataBytesPerChunk;
7249 int yaffs_GetObjectLinkCount(yaffs_Object *obj)
7252 struct ylist_head *i;
7255 count++; /* the object itself */
7257 ylist_for_each(i, &obj->hardLinks)
7258 count++; /* add the hard links; */
7263 int yaffs_GetObjectInode(yaffs_Object *obj)
7265 obj = yaffs_GetEquivalentObject(obj);
7267 return obj->objectId;
7270 unsigned yaffs_GetObjectType(yaffs_Object *obj)
7272 obj = yaffs_GetEquivalentObject(obj);
7274 switch (obj->variantType) {
7275 case YAFFS_OBJECT_TYPE_FILE:
7278 case YAFFS_OBJECT_TYPE_DIRECTORY:
7281 case YAFFS_OBJECT_TYPE_SYMLINK:
7284 case YAFFS_OBJECT_TYPE_HARDLINK:
7287 case YAFFS_OBJECT_TYPE_SPECIAL:
7288 if (S_ISFIFO(obj->yst_mode))
7290 if (S_ISCHR(obj->yst_mode))
7292 if (S_ISBLK(obj->yst_mode))
7294 if (S_ISSOCK(obj->yst_mode))
7302 YCHAR *yaffs_GetSymlinkAlias(yaffs_Object *obj)
7304 obj = yaffs_GetEquivalentObject(obj);
7305 if (obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK)
7306 return yaffs_CloneString(obj->variant.symLinkVariant.alias);
7308 return yaffs_CloneString(_Y(""));
7311 #ifndef CONFIG_YAFFS_WINCE
7313 int yaffs_SetAttributes(yaffs_Object *obj, struct iattr *attr)
7315 unsigned int valid = attr->ia_valid;
7317 if (valid & ATTR_MODE)
7318 obj->yst_mode = attr->ia_mode;
7319 if (valid & ATTR_UID)
7320 obj->yst_uid = attr->ia_uid;
7321 if (valid & ATTR_GID)
7322 obj->yst_gid = attr->ia_gid;
7324 if (valid & ATTR_ATIME)
7325 obj->yst_atime = Y_TIME_CONVERT(attr->ia_atime);
7326 if (valid & ATTR_CTIME)
7327 obj->yst_ctime = Y_TIME_CONVERT(attr->ia_ctime);
7328 if (valid & ATTR_MTIME)
7329 obj->yst_mtime = Y_TIME_CONVERT(attr->ia_mtime);
7331 if (valid & ATTR_SIZE)
7332 yaffs_ResizeFile(obj, attr->ia_size);
7334 yaffs_UpdateObjectHeader(obj, NULL, 1, 0, 0);
7339 int yaffs_GetAttributes(yaffs_Object *obj, struct iattr *attr)
7341 unsigned int valid = 0;
7343 attr->ia_mode = obj->yst_mode;
7345 attr->ia_uid = obj->yst_uid;
7347 attr->ia_gid = obj->yst_gid;
7350 Y_TIME_CONVERT(attr->ia_atime) = obj->yst_atime;
7351 valid |= ATTR_ATIME;
7352 Y_TIME_CONVERT(attr->ia_ctime) = obj->yst_ctime;
7353 valid |= ATTR_CTIME;
7354 Y_TIME_CONVERT(attr->ia_mtime) = obj->yst_mtime;
7355 valid |= ATTR_MTIME;
7357 attr->ia_size = yaffs_GetFileSize(obj);
7360 attr->ia_valid = valid;
7368 int yaffs_DumpObject(yaffs_Object *obj)
7372 yaffs_GetObjectName(obj, name, YAFFS_MAX_NAME_LENGTH + 1);
7374 T(YAFFS_TRACE_ALWAYS,
7376 ("Object %d, inode %d \"%s\"\n dirty %d valid %d serial %d sum %d"
7377 " chunk %d type %d size %d\n"
7378 TENDSTR), obj->objectId, yaffs_GetObjectInode(obj), name,
7379 obj->dirty, obj->valid, obj->serial, obj->sum, obj->hdrChunk,
7380 yaffs_GetObjectType(obj), yaffs_GetObjectFileLength(obj)));
7386 /*---------------------------- Initialisation code -------------------------------------- */
7388 static int yaffs_CheckDevFunctions(const yaffs_Device *dev)
7391 /* Common functions, gotta have */
7392 if (!dev->param.eraseBlockInNAND || !dev->param.initialiseNAND)
7395 #ifdef CONFIG_YAFFS_YAFFS2
7397 /* Can use the "with tags" style interface for yaffs1 or yaffs2 */
7398 if (dev->param.writeChunkWithTagsToNAND &&
7399 dev->param.readChunkWithTagsFromNAND &&
7400 !dev->param.writeChunkToNAND &&
7401 !dev->param.readChunkFromNAND &&
7402 dev->param.markNANDBlockBad &&
7403 dev->param.queryNANDBlock)
7407 /* Can use the "spare" style interface for yaffs1 */
7408 if (!dev->param.isYaffs2 &&
7409 !dev->param.writeChunkWithTagsToNAND &&
7410 !dev->param.readChunkWithTagsFromNAND &&
7411 dev->param.writeChunkToNAND &&
7412 dev->param.readChunkFromNAND &&
7413 !dev->param.markNANDBlockBad &&
7414 !dev->param.queryNANDBlock)
7421 static int yaffs_CreateInitialDirectories(yaffs_Device *dev)
7423 /* Initialise the unlinked, deleted, root and lost and found directories */
7425 dev->lostNFoundDir = dev->rootDir = NULL;
7426 dev->unlinkedDir = dev->deletedDir = NULL;
7429 yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_UNLINKED, S_IFDIR);
7432 yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_DELETED, S_IFDIR);
7435 yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_ROOT,
7436 YAFFS_ROOT_MODE | S_IFDIR);
7437 dev->lostNFoundDir =
7438 yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_LOSTNFOUND,
7439 YAFFS_LOSTNFOUND_MODE | S_IFDIR);
7441 if (dev->lostNFoundDir && dev->rootDir && dev->unlinkedDir && dev->deletedDir) {
7442 yaffs_AddObjectToDirectory(dev->rootDir, dev->lostNFoundDir);
7449 int yaffs_GutsInitialise(yaffs_Device *dev)
7451 int init_failed = 0;
7455 T(YAFFS_TRACE_TRACING, (TSTR("yaffs: yaffs_GutsInitialise()" TENDSTR)));
7457 /* Check stuff that must be set */
7460 T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Need a device" TENDSTR)));
7464 dev->internalStartBlock = dev->param.startBlock;
7465 dev->internalEndBlock = dev->param.endBlock;
7466 dev->blockOffset = 0;
7467 dev->chunkOffset = 0;
7468 dev->nFreeChunks = 0;
7472 if (dev->param.startBlock == 0) {
7473 dev->internalStartBlock = dev->param.startBlock + 1;
7474 dev->internalEndBlock = dev->param.endBlock + 1;
7475 dev->blockOffset = 1;
7476 dev->chunkOffset = dev->param.nChunksPerBlock;
7479 /* Check geometry parameters. */
7481 if ((!dev->param.inbandTags && dev->param.isYaffs2 && dev->param.totalBytesPerChunk < 1024) ||
7482 (!dev->param.isYaffs2 && dev->param.totalBytesPerChunk < 512) ||
7483 (dev->param.inbandTags && !dev->param.isYaffs2) ||
7484 dev->param.nChunksPerBlock < 2 ||
7485 dev->param.nReservedBlocks < 2 ||
7486 dev->internalStartBlock <= 0 ||
7487 dev->internalEndBlock <= 0 ||
7488 dev->internalEndBlock <= (dev->internalStartBlock + dev->param.nReservedBlocks + 2)) { /* otherwise it is too small */
7489 T(YAFFS_TRACE_ALWAYS,
7491 ("yaffs: NAND geometry problems: chunk size %d, type is yaffs%s, inbandTags %d "
7492 TENDSTR), dev->param.totalBytesPerChunk, dev->param.isYaffs2 ? "2" : "", dev->param.inbandTags));
7496 if (yaffs_InitialiseNAND(dev) != YAFFS_OK) {
7497 T(YAFFS_TRACE_ALWAYS,
7498 (TSTR("yaffs: InitialiseNAND failed" TENDSTR)));
7502 /* Sort out space for inband tags, if required */
7503 if (dev->param.inbandTags)
7504 dev->nDataBytesPerChunk = dev->param.totalBytesPerChunk - sizeof(yaffs_PackedTags2TagsPart);
7506 dev->nDataBytesPerChunk = dev->param.totalBytesPerChunk;
7508 /* Got the right mix of functions? */
7509 if (!yaffs_CheckDevFunctions(dev)) {
7510 /* Function missing */
7511 T(YAFFS_TRACE_ALWAYS,
7513 ("yaffs: device function(s) missing or wrong\n" TENDSTR)));
7518 /* This is really a compilation check. */
7519 if (!yaffs_CheckStructures()) {
7520 T(YAFFS_TRACE_ALWAYS,
7521 (TSTR("yaffs_CheckStructures failed\n" TENDSTR)));
7525 if (dev->isMounted) {
7526 T(YAFFS_TRACE_ALWAYS,
7527 (TSTR("yaffs: device already mounted\n" TENDSTR)));
7531 /* Finished with most checks. One or two more checks happen later on too. */
7535 /* OK now calculate a few things for the device */
7538 * Calculate all the chunk size manipulation numbers:
7540 x = dev->nDataBytesPerChunk;
7541 /* We always use dev->chunkShift and dev->chunkDiv */
7542 dev->chunkShift = Shifts(x);
7543 x >>= dev->chunkShift;
7545 /* We only use chunk mask if chunkDiv is 1 */
7546 dev->chunkMask = (1<<dev->chunkShift) - 1;
7549 * Calculate chunkGroupBits.
7550 * We need to find the next power of 2 > than internalEndBlock
7553 x = dev->param.nChunksPerBlock * (dev->internalEndBlock + 1);
7557 /* Set up tnode width if wide tnodes are enabled. */
7558 if (!dev->param.wideTnodesDisabled) {
7559 /* bits must be even so that we end up with 32-bit words */
7563 dev->tnodeWidth = 16;
7565 dev->tnodeWidth = bits;
7567 dev->tnodeWidth = 16;
7569 dev->tnodeMask = (1<<dev->tnodeWidth)-1;
7571 /* Level0 Tnodes are 16 bits or wider (if wide tnodes are enabled),
7572 * so if the bitwidth of the
7573 * chunk range we're using is greater than 16 we need
7574 * to figure out chunk shift and chunkGroupSize
7577 if (bits <= dev->tnodeWidth)
7578 dev->chunkGroupBits = 0;
7580 dev->chunkGroupBits = bits - dev->tnodeWidth;
7583 dev->chunkGroupSize = 1 << dev->chunkGroupBits;
7585 if (dev->param.nChunksPerBlock < dev->chunkGroupSize) {
7586 /* We have a problem because the soft delete won't work if
7587 * the chunk group size > chunks per block.
7588 * This can be remedied by using larger "virtual blocks".
7590 T(YAFFS_TRACE_ALWAYS,
7591 (TSTR("yaffs: chunk group too large\n" TENDSTR)));
7596 /* OK, we've finished verifying the device, lets continue with initialisation */
7598 /* More device initialisation */
7599 dev->garbageCollections = 0;
7600 dev->passiveGarbageCollections = 0;
7601 dev->currentDirtyChecker = 0;
7602 dev->bufferedBlock = -1;
7603 dev->doingBufferedBlockRewrite = 0;
7604 dev->nDeletedFiles = 0;
7605 dev->nBackgroundDeletions = 0;
7606 dev->nUnlinkedFiles = 0;
7608 dev->eccUnfixed = 0;
7609 dev->tagsEccFixed = 0;
7610 dev->tagsEccUnfixed = 0;
7611 dev->nErasureFailures = 0;
7612 dev->nErasedBlocks = 0;
7614 dev->hasPendingPrioritisedGCs = 1; /* Assume the worst for now, will get fixed on first GC */
7615 dev->oldestDirtySequence = 0;
7617 /* Initialise temporary buffers and caches. */
7618 if (!yaffs_InitialiseTempBuffers(dev))
7621 dev->srCache = NULL;
7622 dev->gcCleanupList = NULL;
7626 dev->param.nShortOpCaches > 0) {
7629 int srCacheBytes = dev->param.nShortOpCaches * sizeof(yaffs_ChunkCache);
7631 if (dev->param.nShortOpCaches > YAFFS_MAX_SHORT_OP_CACHES)
7632 dev->param.nShortOpCaches = YAFFS_MAX_SHORT_OP_CACHES;
7634 dev->srCache = YMALLOC(srCacheBytes);
7636 buf = (__u8 *) dev->srCache;
7639 memset(dev->srCache, 0, srCacheBytes);
7641 for (i = 0; i < dev->param.nShortOpCaches && buf; i++) {
7642 dev->srCache[i].object = NULL;
7643 dev->srCache[i].lastUse = 0;
7644 dev->srCache[i].dirty = 0;
7645 dev->srCache[i].data = buf = YMALLOC_DMA(dev->param.totalBytesPerChunk);
7656 dev->gcCleanupList = YMALLOC(dev->param.nChunksPerBlock * sizeof(__u32));
7657 if (!dev->gcCleanupList)
7661 if (dev->param.isYaffs2)
7662 dev->param.useHeaderFileSize = 1;
7664 if (!init_failed && !yaffs_InitialiseBlocks(dev))
7667 yaffs_InitialiseTnodes(dev);
7668 yaffs_InitialiseObjects(dev);
7670 if (!init_failed && !yaffs_CreateInitialDirectories(dev))
7675 /* Now scan the flash. */
7676 if (dev->param.isYaffs2) {
7677 if (yaffs_CheckpointRestore(dev)) {
7678 yaffs_CheckObjectDetailsLoaded(dev->rootDir);
7679 T(YAFFS_TRACE_ALWAYS,
7680 (TSTR("yaffs: restored from checkpoint" TENDSTR)));
7683 /* Clean up the mess caused by an aborted checkpoint load
7684 * and scan backwards.
7686 yaffs_DeinitialiseBlocks(dev);
7687 yaffs_DeinitialiseTnodes(dev);
7688 yaffs_DeinitialiseObjects(dev);
7691 dev->nErasedBlocks = 0;
7692 dev->nFreeChunks = 0;
7693 dev->allocationBlock = -1;
7694 dev->allocationPage = -1;
7695 dev->nDeletedFiles = 0;
7696 dev->nUnlinkedFiles = 0;
7697 dev->nBackgroundDeletions = 0;
7699 if (!init_failed && !yaffs_InitialiseBlocks(dev))
7702 yaffs_InitialiseTnodes(dev);
7703 yaffs_InitialiseObjects(dev);
7705 if (!init_failed && !yaffs_CreateInitialDirectories(dev))
7708 if (!init_failed && !yaffs_ScanBackwards(dev))
7711 } else if (!yaffs_Scan(dev))
7714 yaffs_StripDeletedObjects(dev);
7715 yaffs_FixHangingObjects(dev);
7716 if(dev->param.emptyLostAndFound)
7717 yaffs_EmptyLostAndFound(dev);
7721 /* Clean up the mess */
7722 T(YAFFS_TRACE_TRACING,
7723 (TSTR("yaffs: yaffs_GutsInitialise() aborted.\n" TENDSTR)));
7725 yaffs_Deinitialise(dev);
7729 /* Zero out stats */
7730 dev->nPageReads = 0;
7731 dev->nPageWrites = 0;
7732 dev->nBlockErasures = 0;
7734 dev->nRetriedWrites = 0;
7736 dev->nRetiredBlocks = 0;
7738 yaffs_VerifyFreeChunks(dev);
7739 yaffs_VerifyBlocks(dev);
7741 /* Clean up any aborted checkpoint data */
7742 if(!dev->isCheckpointed && dev->blocksInCheckpoint > 0)
7743 yaffs_InvalidateCheckpoint(dev);
7745 T(YAFFS_TRACE_TRACING,
7746 (TSTR("yaffs: yaffs_GutsInitialise() done.\n" TENDSTR)));
7751 void yaffs_Deinitialise(yaffs_Device *dev)
7753 if (dev->isMounted) {
7756 yaffs_DeinitialiseBlocks(dev);
7757 yaffs_DeinitialiseTnodes(dev);
7758 yaffs_DeinitialiseObjects(dev);
7759 if (dev->param.nShortOpCaches > 0 &&
7762 for (i = 0; i < dev->param.nShortOpCaches; i++) {
7763 if (dev->srCache[i].data)
7764 YFREE(dev->srCache[i].data);
7765 dev->srCache[i].data = NULL;
7768 YFREE(dev->srCache);
7769 dev->srCache = NULL;
7772 YFREE(dev->gcCleanupList);
7774 for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++)
7775 YFREE(dev->tempBuffer[i].buffer);
7779 if (dev->param.deinitialiseNAND)
7780 dev->param.deinitialiseNAND(dev);
7784 static int yaffs_CountFreeChunks(yaffs_Device *dev)
7789 yaffs_BlockInfo *blk;
7791 for (nFree = 0, b = dev->internalStartBlock; b <= dev->internalEndBlock;
7793 blk = yaffs_GetBlockInfo(dev, b);
7795 switch (blk->blockState) {
7796 case YAFFS_BLOCK_STATE_EMPTY:
7797 case YAFFS_BLOCK_STATE_ALLOCATING:
7798 case YAFFS_BLOCK_STATE_COLLECTING:
7799 case YAFFS_BLOCK_STATE_FULL:
7801 (dev->param.nChunksPerBlock - blk->pagesInUse +
7802 blk->softDeletions);
7812 int yaffs_GetNumberOfFreeChunks(yaffs_Device *dev)
7814 /* This is what we report to the outside world */
7817 int nDirtyCacheChunks;
7818 int blocksForCheckpoint;
7822 nFree = dev->nFreeChunks;
7824 nFree = yaffs_CountFreeChunks(dev);
7827 nFree += dev->nDeletedFiles;
7829 /* Now count the number of dirty chunks in the cache and subtract those */
7831 for (nDirtyCacheChunks = 0, i = 0; i < dev->param.nShortOpCaches; i++) {
7832 if (dev->srCache[i].dirty)
7833 nDirtyCacheChunks++;
7836 nFree -= nDirtyCacheChunks;
7838 nFree -= ((dev->param.nReservedBlocks + 1) * dev->param.nChunksPerBlock);
7840 /* Now we figure out how much to reserve for the checkpoint and report that... */
7841 blocksForCheckpoint = yaffs_CalcCheckpointBlocksRequired(dev) - dev->blocksInCheckpoint;
7842 if (blocksForCheckpoint < 0)
7843 blocksForCheckpoint = 0;
7845 nFree -= (blocksForCheckpoint * dev->param.nChunksPerBlock);
7854 static int yaffs_freeVerificationFailures;
7856 static void yaffs_VerifyFreeChunks(yaffs_Device *dev)
7861 if (yaffs_SkipVerification(dev))
7864 counted = yaffs_CountFreeChunks(dev);
7866 difference = dev->nFreeChunks - counted;
7869 T(YAFFS_TRACE_ALWAYS,
7870 (TSTR("Freechunks verification failure %d %d %d" TENDSTR),
7871 dev->nFreeChunks, counted, difference));
7872 yaffs_freeVerificationFailures++;
7876 /*---------------------------------------- YAFFS test code ----------------------*/
7878 #define yaffs_CheckStruct(structure, syze, name) \
7880 if (sizeof(structure) != syze) { \
7881 T(YAFFS_TRACE_ALWAYS, (TSTR("%s should be %d but is %d\n" TENDSTR),\
7882 name, syze, (int) sizeof(structure))); \
7883 return YAFFS_FAIL; \
7887 static int yaffs_CheckStructures(void)
7889 /* yaffs_CheckStruct(yaffs_Tags,8,"yaffs_Tags"); */
7890 /* yaffs_CheckStruct(yaffs_TagsUnion,8,"yaffs_TagsUnion"); */
7891 /* yaffs_CheckStruct(yaffs_Spare,16,"yaffs_Spare"); */
7892 #ifndef CONFIG_YAFFS_TNODE_LIST_DEBUG
7893 /* yaffs_CheckStruct(yaffs_Tnode, 2 * YAFFS_NTNODES_LEVEL0, "yaffs_Tnode"); */
7895 #ifndef CONFIG_YAFFS_WINCE
7896 yaffs_CheckStruct(yaffs_ObjectHeader, 512, "yaffs_ObjectHeader");