3 * YAFFS: Yet another FFS. A NAND-flash specific file system.
5 * Copyright (C) 2002 Aleph One Ltd.
6 * for Toby Churchill Ltd and Brightstar Engineering
8 * Created by Charles Manning <charles@aleph1.co.uk>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
17 const char *yaffs_guts_c_version="$Id: yaffs_guts.c,v 1.7 2005-07-03 10:32:40 charles Exp $";
21 #include "yaffsinterface.h"
22 #include "yaffs_guts.h"
23 #include "yaffs_tagsvalidity.h"
26 #include "yaffs_tagscompat.h"
28 #ifdef CONFIG_YAFFS_WINCE
29 void yfsd_LockYAFFS(BOOL fsLockOnly);
30 void yfsd_UnlockYAFFS(BOOL fsLockOnly);
33 #define YAFFS_PASSIVE_GC_CHUNKS 2
36 // Use Steven Hill's ECC struff instead
37 // External functions for ECC on data
38 void nand_calculate_ecc (const u_char *dat, u_char *ecc_code);
39 int nand_correct_data (u_char *dat, u_char *read_ecc, u_char *calc_ecc);
40 #define yaffs_ECCCalculate(data,ecc) nand_calculate_ecc(data,ecc)
41 #define yaffs_ECCCorrect(data,read_ecc,calc_ecc) nand_correct_ecc(data,read_ecc,calc_ecc)
43 #include "yaffs_ecc.h"
47 // countBits is a quick way of counting the number of bits in a byte.
48 // ie. countBits[n] holds the number of 1 bits in a byte with the value n.
50 static const char yaffs_countBitsTable[256] =
52 0,1,1,2,1,2,2,3,1,2,2,3,2,3,3,4,
53 1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,
54 1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,
55 2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
56 1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,
57 2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
58 2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
59 3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7,
60 1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,
61 2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
62 2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
63 3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7,
64 2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
65 3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7,
66 3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7,
67 4,5,5,6,5,6,6,7,5,6,6,7,6,7,7,8
70 static int yaffs_CountBits(__u8 x)
73 retVal = yaffs_countBitsTable[x];
81 // Stuff using yea olde tags
82 static void yaffs_LoadTagsIntoSpare(yaffs_Spare *sparePtr, yaffs_Tags *tagsPtr);
83 static void yaffs_GetTagsFromSpare(yaffs_Device *dev, yaffs_Spare *sparePtr,yaffs_Tags *tagsPtr);
85 static int yaffs_ReadChunkTagsFromNAND(yaffs_Device *dev,int chunkInNAND, yaffs_Tags *tags, int *chunkDeleted);
86 static int yaffs_TagsMatch(const yaffs_Tags *tags, int objectId, int chunkInObject, int chunkDeleted);
93 static Y_INLINE int yaffs_ReadChunkWithTagsFromNAND(yaffs_Device *dev,int chunkInNAND, __u8 *buffer, yaffs_ExtendedTags *tags);
94 static Y_INLINE int yaffs_WriteChunkWithTagsToNAND(yaffs_Device *dev,int chunkInNAND, const __u8 *data, yaffs_ExtendedTags *tags);
95 static Y_INLINE int yaffs_MarkBlockBad(yaffs_Device *dev, int blockNo);
96 static Y_INLINE int yaffs_QueryInitialBlockState(yaffs_Device *dev,int blockNo, yaffs_BlockState *state,unsigned *sequenceNumber);
98 static int yaffs_WriteNewChunkWithTagsToNAND(yaffs_Device *dev, const __u8 *buffer, yaffs_ExtendedTags *tags, int useReserve);
100 static int yaffs_CheckObjectHashSanity(yaffs_Device *dev);
102 static int yaffs_PutChunkIntoFile(yaffs_Object *in,int chunkInInode, int chunkInNAND, int inScan);
104 static yaffs_Object *yaffs_CreateNewObject(yaffs_Device *dev,int number,yaffs_ObjectType type);
105 static void yaffs_AddObjectToDirectory(yaffs_Object *directory, yaffs_Object *obj);
106 static int yaffs_UpdateObjectHeader(yaffs_Object *in,const YCHAR *name, int force,int isShrink);
107 static void yaffs_RemoveObjectFromDirectory(yaffs_Object *obj);
108 static int yaffs_CheckStructures(void);
109 static int yaffs_DeleteWorker(yaffs_Object *in, yaffs_Tnode *tn, __u32 level, int chunkOffset,int *limit);
110 static int yaffs_DoGenericObjectDeletion(yaffs_Object *in);
112 static yaffs_BlockInfo *yaffs_GetBlockInfo(yaffs_Device *dev,int blockNo);
114 static __u8 *yaffs_GetTempBuffer(yaffs_Device *dev,int lineNo);
115 static void yaffs_ReleaseTempBuffer(yaffs_Device *dev, __u8 *buffer, int lineNo);
118 // Robustification (if it ever comes about...)
119 static void yaffs_RetireBlock(yaffs_Device *dev,int blockInNAND);
121 static void yaffs_HandleReadDataError(yaffs_Device *dev,int chunkInNAND);
123 static void yaffs_HandleWriteChunkError(yaffs_Device *dev,int chunkInNAND);
124 static void yaffs_HandleWriteChunkOk(yaffs_Device *dev,int chunkInNAND,const __u8 *data, const yaffs_ExtendedTags *tags);
125 static void yaffs_HandleUpdateChunk(yaffs_Device *dev,int chunkInNAND, const yaffs_ExtendedTags *tags);
127 static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,int chunkInNAND);
129 static int yaffs_UnlinkWorker(yaffs_Object *obj);
130 static void yaffs_DestroyObject(yaffs_Object *obj);
133 static int yaffs_VerifyCompare(const __u8 *d0, const __u8 * d1, const yaffs_Spare *s0, const yaffs_Spare *s1,int dataSize);
136 static int yaffs_TagsMatch(const yaffs_ExtendedTags *tags, int objectId, int chunkInObject);
139 loff_t yaffs_GetFileSize(yaffs_Object *obj);
142 static int yaffs_AllocateChunk(yaffs_Device *dev,int useReserve);
144 #ifdef YAFFS_PARANOID
145 static int yaffs_CheckFileSanity(yaffs_Object *in);
147 #define yaffs_CheckFileSanity(in)
150 static void yaffs_InvalidateWholeChunkCache(yaffs_Object *in);
151 static void yaffs_InvalidateChunkCache(yaffs_Object *object, int chunkId);
153 static int yaffs_ReadChunkWithTagsFromNAND(yaffs_Device *dev,int chunkInNAND, __u8 *buffer, yaffs_ExtendedTags *tags)
155 if(dev->readChunkWithTagsFromNAND)
156 return dev->readChunkWithTagsFromNAND(dev,chunkInNAND,buffer,tags);
158 return yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(dev,chunkInNAND,buffer,tags);
161 static Y_INLINE int yaffs_WriteChunkWithTagsToNAND(yaffs_Device *dev,int chunkInNAND, const __u8 *buffer, yaffs_ExtendedTags *tags)
165 tags->sequenceNumber = dev->sequenceNumber;
167 if(!yaffs_ValidateTags(tags))
169 T(YAFFS_TRACE_ERROR,(TSTR("Writing uninitialised tags" TENDSTR)));
172 T(YAFFS_TRACE_WRITE,(TSTR("Writing chunk %d tags %d %d"TENDSTR),chunkInNAND,tags->objectId,tags->chunkId));
176 T(YAFFS_TRACE_ERROR,(TSTR("Writing with no tags" TENDSTR)));
180 if(dev->writeChunkWithTagsToNAND)
181 return dev->writeChunkWithTagsToNAND(dev,chunkInNAND,buffer,tags);
183 return yaffs_TagsCompatabilityWriteChunkWithTagsToNAND(dev,chunkInNAND,buffer,tags);
186 static Y_INLINE int yaffs_MarkBlockBad(yaffs_Device *dev, int blockNo)
188 if(dev->markNANDBlockBad)
189 return dev->markNANDBlockBad(dev,blockNo);
191 return yaffs_TagsCompatabilityMarkNANDBlockBad(dev,blockNo);
193 static Y_INLINE int yaffs_QueryInitialBlockState(yaffs_Device *dev,int blockNo, yaffs_BlockState *state, unsigned *sequenceNumber)
195 if(dev->queryNANDBlock)
196 return dev->queryNANDBlock(dev,blockNo,state,sequenceNumber);
198 return yaffs_TagsCompatabilityQueryNANDBlock(dev,blockNo,state,sequenceNumber);
201 int yaffs_EraseBlockInNAND(struct yaffs_DeviceStruct *dev,int blockInNAND)
205 dev->nBlockErasures++;
206 result = dev->eraseBlockInNAND(dev,blockInNAND);
208 if(!result)result = dev->eraseBlockInNAND(dev,blockInNAND); // If at first we don't succeed, try again *once*.
212 static int yaffs_InitialiseNAND(struct yaffs_DeviceStruct *dev)
214 return dev->initialiseNAND(dev);
220 // Temporary buffer manipulations
222 static __u8 *yaffs_GetTempBuffer(yaffs_Device *dev,int lineNo)
225 for(i = 0; i < YAFFS_N_TEMP_BUFFERS; i++)
227 if(dev->tempBuffer[i].line == 0)
229 dev->tempBuffer[i].line = lineNo;
230 if((i+1) > dev->maxTemp)
232 dev->maxTemp = i + 1;
233 for(j = 0; j <= i; j++)
234 dev->tempBuffer[j].maxLine = dev->tempBuffer[j].line;
237 return dev->tempBuffer[i].buffer;
241 T(YAFFS_TRACE_BUFFERS,(TSTR("Out of temp buffers at line %d, other held by lines:"),lineNo));
242 for(i = 0; i < YAFFS_N_TEMP_BUFFERS; i++)
244 T(YAFFS_TRACE_BUFFERS,(TSTR(" %d "),dev->tempBuffer[i].line));
246 T(YAFFS_TRACE_BUFFERS,(TSTR(" "TENDSTR)));
248 dev->unmanagedTempAllocations++;
249 // Get an unmanaged one
250 return YMALLOC(dev->nBytesPerChunk);
255 static void yaffs_ReleaseTempBuffer(yaffs_Device *dev, __u8 *buffer, int lineNo)
258 for(i = 0; i < YAFFS_N_TEMP_BUFFERS; i++)
260 if(dev->tempBuffer[i].buffer == buffer)
262 dev->tempBuffer[i].line = 0;
269 // assume it is an unmanaged one.
270 T(YAFFS_TRACE_BUFFERS,(TSTR("Releasing unmanaged temp buffer in line %d" TENDSTR),lineNo));
272 dev->unmanagedTempDeallocations++;
278 // Chunk bitmap manipulations
280 static Y_INLINE __u8 *yaffs_BlockBits(yaffs_Device *dev, int blk)
282 if(blk < dev->startBlock || blk > dev->endBlock)
284 T(YAFFS_TRACE_ERROR,(TSTR("**>> yaffs: BlockBits block %d is not valid" TENDSTR),blk));
287 return dev->chunkBits + (dev->chunkBitmapStride * (blk - dev->startBlock));
290 static Y_INLINE void yaffs_ClearChunkBits(yaffs_Device *dev,int blk)
292 __u8 *blkBits = yaffs_BlockBits(dev,blk);
294 memset(blkBits,0,dev->chunkBitmapStride);
297 static Y_INLINE void yaffs_ClearChunkBit(yaffs_Device *dev,int blk,int chunk)
299 __u8 *blkBits = yaffs_BlockBits(dev,blk);
301 blkBits[chunk/8] &= ~ (1<<(chunk & 7));
304 static Y_INLINE void yaffs_SetChunkBit(yaffs_Device *dev,int blk,int chunk)
306 __u8 *blkBits = yaffs_BlockBits(dev,blk);
308 blkBits[chunk/8] |= (1<<(chunk & 7));
311 static Y_INLINE int yaffs_CheckChunkBit(yaffs_Device *dev,int blk,int chunk)
313 __u8 *blkBits = yaffs_BlockBits(dev,blk);
314 return (blkBits[chunk/8] & (1<<(chunk & 7))) ? 1 :0;
317 static Y_INLINE int yaffs_StillSomeChunkBits(yaffs_Device *dev,int blk)
319 __u8 *blkBits = yaffs_BlockBits(dev,blk);
321 for(i = 0; i < dev->chunkBitmapStride; i++)
323 if(*blkBits) return 1;
330 // Function to manipulate block info
331 static Y_INLINE yaffs_BlockInfo* yaffs_GetBlockInfo(yaffs_Device *dev, int blk)
333 if(blk < dev->startBlock || blk > dev->endBlock)
335 T(YAFFS_TRACE_ERROR,(TSTR("**>> yaffs: getBlockInfo block %d is not valid" TENDSTR),blk));
338 return &dev->blockInfo[blk - dev->startBlock];
343 static Y_INLINE int yaffs_HashFunction(int n)
345 return (n % YAFFS_NOBJECT_BUCKETS);
349 yaffs_Object *yaffs_Root(yaffs_Device *dev)
354 yaffs_Object *yaffs_LostNFound(yaffs_Device *dev)
356 return dev->lostNFoundDir;
360 static int yaffs_WriteChunkToNAND(struct yaffs_DeviceStruct *dev,int chunkInNAND, const __u8 *data, yaffs_Spare *spare)
362 if(chunkInNAND < dev->startBlock * dev->nChunksPerBlock)
364 T(YAFFS_TRACE_ERROR,(TSTR("**>> yaffs chunk %d is not valid" TENDSTR),chunkInNAND));
369 return dev->writeChunkToNAND(dev,chunkInNAND,data,spare);
374 static int yaffs_ReadChunkFromNAND(struct yaffs_DeviceStruct *dev,
378 int doErrorCorrection)
381 yaffs_Spare localSpare;
390 // If we don't have a real spare, then we use a local one.
391 // Need this for the calculation of the ecc
398 retVal = dev->readChunkFromNAND(dev,chunkInNAND,data,spare);
399 if(data && doErrorCorrection)
402 //Todo handle any errors
403 int eccResult1,eccResult2;
406 yaffs_ECCCalculate(data,calcEcc);
407 eccResult1 = yaffs_ECCCorrect (data,spare->ecc1, calcEcc);
408 yaffs_ECCCalculate(&data[256],calcEcc);
409 eccResult2 = yaffs_ECCCorrect(&data[256],spare->ecc2, calcEcc);
413 T(YAFFS_TRACE_ERROR, (TSTR("**>>ecc error fix performed on chunk %d:0" TENDSTR),chunkInNAND));
416 else if(eccResult1<0)
418 T(YAFFS_TRACE_ERROR,(TSTR("**>>ecc error unfixed on chunk %d:0" TENDSTR),chunkInNAND));
424 T(YAFFS_TRACE_ERROR,(TSTR("**>>ecc error fix performed on chunk %d:1" TENDSTR),chunkInNAND));
427 else if(eccResult2<0)
429 T(YAFFS_TRACE_ERROR,(TSTR("**>>ecc error unfixed on chunk %d:1" TENDSTR),chunkInNAND));
433 if(eccResult1 || eccResult2)
435 // Hoosterman, we had a data problem on this page
436 yaffs_HandleReadDataError(dev,chunkInNAND);
442 // Must allocate enough memory for spare+2*sizeof(int) for ecc results from device.
443 struct yaffs_NANDSpare nspare;
444 retVal = dev->readChunkFromNAND(dev,chunkInNAND,data,(yaffs_Spare*)&nspare);
445 memcpy (spare, &nspare, sizeof(yaffs_Spare));
446 if(data && doErrorCorrection)
450 T(YAFFS_TRACE_ERROR,(TSTR("**>>ecc error fix performed on chunk %d:0" TENDSTR),chunkInNAND));
452 else if(nspare.eccres1<0)
454 T(YAFFS_TRACE_ERROR,(TSTR("**>>ecc error unfixed on chunk %d:0" TENDSTR),chunkInNAND));
459 T(YAFFS_TRACE_ERROR,(TSTR("**>>ecc error fix performed on chunk %d:1" TENDSTR),chunkInNAND));
461 else if(nspare.eccres2<0)
463 T(YAFFS_TRACE_ERROR,(TSTR("**>>ecc error unfixed on chunk %d:1" TENDSTR),chunkInNAND));
466 if(nspare.eccres1 || nspare.eccres2)
468 // Hoosterman, we had a data problem on this page
469 yaffs_HandleReadDataError(dev,chunkInNAND);
481 int yaffs_CheckFF(__u8 *buffer,int nBytes)
483 //Horrible, slow implementation
486 if(*buffer != 0xFF) return 0;
492 static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,int chunkInNAND)
495 int retval = YAFFS_OK;
496 __u8 *data = yaffs_GetTempBuffer(dev,__LINE__);
497 yaffs_ExtendedTags tags;
499 // NCB dev->readChunkWithTagsFromNAND(dev,chunkInNAND,data,&tags);
500 yaffs_ReadChunkWithTagsFromNAND(dev,chunkInNAND,data,&tags);
502 if(!yaffs_CheckFF(data,dev->nBytesPerChunk) || tags.chunkUsed)
504 T(YAFFS_TRACE_NANDACCESS,(TSTR("Chunk %d not erased" TENDSTR),chunkInNAND));
508 yaffs_ReleaseTempBuffer(dev,data,__LINE__);
517 static int yaffs_WriteNewChunkWithTagsToNAND(struct yaffs_DeviceStruct *dev, const __u8 *data, yaffs_ExtendedTags *tags,int useReserve)
527 chunk = yaffs_AllocateChunk(dev,useReserve);
532 // First check this chunk is erased...
533 #ifndef CONFIG_YAFFS_DISABLE_CHUNK_ERASED_CHECK
534 writeOk = yaffs_CheckChunkErased(dev,chunk);
538 T(YAFFS_TRACE_ERROR,(TSTR("**>> yaffs chunk %d was not erased" TENDSTR),chunk));
542 writeOk = yaffs_WriteChunkWithTagsToNAND(dev,chunk,data,tags);
548 // Copy the data into the robustification buffer.
549 // NB We do this at the end to prevent duplicates in the case of a write error.
551 yaffs_HandleWriteChunkOk(dev,chunk,data,tags);
555 yaffs_HandleWriteChunkError(dev,chunk);
559 } while(chunk >= 0 && ! writeOk);
563 T(YAFFS_TRACE_ERROR,(TSTR("**>> yaffs write required %d attempts" TENDSTR),attempts));
564 dev->nRetriedWrites+= (attempts - 1);
575 // Functions for robustisizing
579 static void yaffs_RetireBlock(yaffs_Device *dev,int blockInNAND)
582 yaffs_MarkBlockBad(dev,blockInNAND);
584 yaffs_GetBlockInfo(dev,blockInNAND)->blockState = YAFFS_BLOCK_STATE_DEAD;
586 dev->nRetiredBlocks++;
591 static int yaffs_RewriteBufferedBlock(yaffs_Device *dev)
593 dev->doingBufferedBlockRewrite = 1;
595 // Remove erased chunks
596 // Rewrite existing chunks to a new block
597 // Set current write block to the new block
599 dev->doingBufferedBlockRewrite = 0;
605 static void yaffs_HandleReadDataError(yaffs_Device *dev,int chunkInNAND)
607 int blockInNAND = chunkInNAND/dev->nChunksPerBlock;
609 // Mark the block for retirement
610 yaffs_GetBlockInfo(dev,blockInNAND)->needsRetiring = 1;
611 T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,(TSTR("**>>Block %d marked for retirement" TENDSTR),blockInNAND));
615 // Just do a garbage collection on the affected block then retire the block
620 static void yaffs_CheckWrittenBlock(yaffs_Device *dev,int chunkInNAND)
626 static void yaffs_HandleWriteChunkOk(yaffs_Device *dev,int chunkInNAND,const __u8 *data, const yaffs_ExtendedTags *tags)
630 static void yaffs_HandleUpdateChunk(yaffs_Device *dev,int chunkInNAND, const yaffs_ExtendedTags *tags)
634 static void yaffs_HandleWriteChunkError(yaffs_Device *dev,int chunkInNAND)
636 int blockInNAND = chunkInNAND/dev->nChunksPerBlock;
638 // Mark the block for retirement
639 yaffs_GetBlockInfo(dev,blockInNAND)->needsRetiring = 1;
641 yaffs_DeleteChunk(dev,chunkInNAND,1,__LINE__);
647 static int yaffs_VerifyCompare(const __u8 *d0, const __u8 * d1, const yaffs_Spare *s0, const yaffs_Spare *s1,int dataSize)
651 if( memcmp(d0,d1,dataSize) != 0 ||
652 s0->tagByte0 != s1->tagByte0 ||
653 s0->tagByte1 != s1->tagByte1 ||
654 s0->tagByte2 != s1->tagByte2 ||
655 s0->tagByte3 != s1->tagByte3 ||
656 s0->tagByte4 != s1->tagByte4 ||
657 s0->tagByte5 != s1->tagByte5 ||
658 s0->tagByte6 != s1->tagByte6 ||
659 s0->tagByte7 != s1->tagByte7 ||
660 s0->ecc1[0] != s1->ecc1[0] ||
661 s0->ecc1[1] != s1->ecc1[1] ||
662 s0->ecc1[2] != s1->ecc1[2] ||
663 s0->ecc2[0] != s1->ecc2[0] ||
664 s0->ecc2[1] != s1->ecc2[1] ||
665 s0->ecc2[2] != s1->ecc2[2] )
675 ///////////////////////// Object management //////////////////
676 // List of spare objects
677 // The list is hooked together using the first pointer
680 // static yaffs_Object *yaffs_freeObjects = NULL;
682 // static int yaffs_nFreeObjects;
684 // static yaffs_ObjectList *yaffs_allocatedObjectList = NULL;
686 // static yaffs_ObjectBucket yaffs_objectBucket[YAFFS_NOBJECT_BUCKETS];
689 static __u16 yaffs_CalcNameSum(const YCHAR *name)
694 YUCHAR *bname = (YUCHAR *)name;
697 while ((*bname) && (i <=YAFFS_MAX_NAME_LENGTH))
700 #ifdef CONFIG_YAFFS_CASE_INSENSITIVE
701 sum += yaffs_toupper(*bname) * i;
712 void yaffs_SetObjectName(yaffs_Object *obj, const YCHAR *name)
714 #ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM
715 if(name && yaffs_strlen(name) <= YAFFS_SHORT_NAME_LENGTH)
717 yaffs_strcpy(obj->shortName,name);
721 obj->shortName[0]=_Y('\0');
724 obj->sum = yaffs_CalcNameSum(name);
728 void yaffs_CalcECC(const __u8 *data, yaffs_Spare *spare)
730 yaffs_ECCCalculate(data , spare->ecc1);
731 yaffs_ECCCalculate(&data[256] , spare->ecc2);
736 ///////////////////////// TNODES ///////////////////////
738 // List of spare tnodes
739 // The list is hooked together using the first pointer
742 //static yaffs_Tnode *yaffs_freeTnodes = NULL;
744 // static int yaffs_nFreeTnodes;
746 //static yaffs_TnodeList *yaffs_allocatedTnodeList = NULL;
750 // yaffs_CreateTnodes creates a bunch more tnodes and
751 // adds them to the tnode free list.
752 // Don't use this function directly
754 static int yaffs_CreateTnodes(yaffs_Device *dev,int nTnodes)
757 yaffs_Tnode *newTnodes;
758 yaffs_TnodeList *tnl;
760 if(nTnodes < 1) return YAFFS_OK;
764 newTnodes = YMALLOC(nTnodes * sizeof(yaffs_Tnode));
768 T(YAFFS_TRACE_ERROR,(TSTR("yaffs: Could not allocate Tnodes"TENDSTR)));
772 // Hook them into the free list
773 for(i = 0; i < nTnodes - 1; i++)
775 newTnodes[i].internal[0] = &newTnodes[i+1];
776 #ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
777 newTnodes[i].internal[YAFFS_NTNODES_INTERNAL] = 1;
781 newTnodes[nTnodes - 1].internal[0] = dev->freeTnodes;
782 #ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
783 newTnodes[nTnodes - 1].internal[YAFFS_NTNODES_INTERNAL] = 1;
785 dev->freeTnodes = newTnodes;
786 dev->nFreeTnodes+= nTnodes;
787 dev->nTnodesCreated += nTnodes;
789 // Now add this bunch of tnodes to a list for freeing up.
790 // NB If we can't add this to the management list it isn't fatal
791 // but it just means we can't free this bunch of tnodes later.
792 tnl = YMALLOC(sizeof(yaffs_TnodeList));
795 T(YAFFS_TRACE_ERROR,(TSTR("yaffs: Could not add tnodes to management list" TENDSTR)));
800 tnl->tnodes = newTnodes;
801 tnl->next = dev->allocatedTnodeList;
802 dev->allocatedTnodeList = tnl;
806 T(YAFFS_TRACE_ALLOCATE,(TSTR("yaffs: Tnodes added" TENDSTR)));
813 // GetTnode gets us a clean tnode. Tries to make allocate more if we run out
814 static yaffs_Tnode *yaffs_GetTnode(yaffs_Device *dev)
816 yaffs_Tnode *tn = NULL;
818 // If there are none left make more
821 yaffs_CreateTnodes(dev,YAFFS_ALLOCATION_NTNODES);
826 tn = dev->freeTnodes;
827 #ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
828 if(tn->internal[YAFFS_NTNODES_INTERNAL] != 1)
830 // Hoosterman, this thing looks like it isn't in the list
831 T(YAFFS_TRACE_ALWAYS,(TSTR("yaffs: Tnode list bug 1" TENDSTR)));
834 dev->freeTnodes = dev->freeTnodes->internal[0];
837 memset(tn,0,sizeof(yaffs_Tnode));
845 // FreeTnode frees up a tnode and puts it back on the free list
846 static void yaffs_FreeTnode(yaffs_Device*dev, yaffs_Tnode *tn)
850 #ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
851 if(tn->internal[YAFFS_NTNODES_INTERNAL] != 0)
853 // Hoosterman, this thing looks like it is already in the list
854 T(YAFFS_TRACE_ALWAYS,(TSTR("yaffs: Tnode list bug 2" TENDSTR)));
856 tn->internal[YAFFS_NTNODES_INTERNAL] = 1;
858 tn->internal[0] = dev->freeTnodes;
859 dev->freeTnodes = tn;
865 static void yaffs_DeinitialiseTnodes(yaffs_Device*dev)
867 // Free the list of allocated tnodes
868 yaffs_TnodeList *tmp;
870 while(dev->allocatedTnodeList)
872 tmp = dev->allocatedTnodeList->next;
874 YFREE(dev->allocatedTnodeList->tnodes);
875 YFREE(dev->allocatedTnodeList);
876 dev->allocatedTnodeList = tmp;
880 dev->freeTnodes = NULL;
881 dev->nFreeTnodes = 0;
884 static void yaffs_InitialiseTnodes(yaffs_Device*dev)
886 dev->allocatedTnodeList = NULL;
887 dev->freeTnodes = NULL;
888 dev->nFreeTnodes = 0;
889 dev->nTnodesCreated = 0;
894 void yaffs_TnodeTest(yaffs_Device *dev)
899 yaffs_Tnode *tn[1000];
901 YINFO("Testing TNodes");
903 for(j = 0; j < 50; j++)
905 for(i = 0; i < 1000; i++)
907 tn[i] = yaffs_GetTnode(dev);
910 YALERT("Getting tnode failed");
913 for(i = 0; i < 1000; i+=3)
915 yaffs_FreeTnode(dev,tn[i]);
924 ////////////////// END OF TNODE MANIPULATION ///////////////////////////
926 /////////////// Functions to manipulate the look-up tree (made up of tnodes)
927 // The look up tree is represented by the top tnode and the number of topLevel
928 // in the tree. 0 means only the level 0 tnode is in the tree.
931 // FindLevel0Tnode finds the level 0 tnode, if one exists.
932 // Used when reading.....
933 static yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device *dev,yaffs_FileStructure *fStruct, __u32 chunkId)
936 yaffs_Tnode *tn = fStruct->top;
938 int requiredTallness;
939 int level = fStruct->topLevel;
941 // Check sane level and chunk Id
942 if(level < 0 || level > YAFFS_TNODES_MAX_LEVEL)
945 // sprintf(str,"Bad level %d",level);
950 if(chunkId > YAFFS_MAX_CHUNK_ID)
953 // sprintf(str,"Bad chunkId %d",chunkId);
958 // First check we're tall enough (ie enough topLevel)
960 i = chunkId >> (/*dev->chunkGroupBits + */YAFFS_TNODES_LEVEL0_BITS);
961 requiredTallness = 0;
964 i >>= YAFFS_TNODES_INTERNAL_BITS;
969 if(requiredTallness > fStruct->topLevel)
971 // Not tall enough, so we can't find it, return NULL.
976 // Traverse down to level 0
977 while (level > 0 && tn)
979 tn = tn->internal[(chunkId >>(/* dev->chunkGroupBits + */ YAFFS_TNODES_LEVEL0_BITS + (level-1) * YAFFS_TNODES_INTERNAL_BITS)) &
980 YAFFS_TNODES_INTERNAL_MASK];
988 // AddOrFindLevel0Tnode finds the level 0 tnode if it exists, otherwise first expands the tree.
989 // This happens in two steps:
990 // 1. If the tree isn't tall enough, then make it taller.
991 // 2. Scan down the tree towards the level 0 tnode adding tnodes if required.
993 // Used when modifying the tree.
995 static yaffs_Tnode *yaffs_AddOrFindLevel0Tnode(yaffs_Device *dev, yaffs_FileStructure *fStruct, __u32 chunkId)
1000 int requiredTallness;
1007 //T((TSTR("AddOrFind topLevel=%d, chunk=%d"),fStruct->topLevel,chunkId));
1009 // Check sane level and page Id
1010 if(fStruct->topLevel < 0 || fStruct->topLevel > YAFFS_TNODES_MAX_LEVEL)
1013 // sprintf(str,"Bad level %d",fStruct->topLevel);
1018 if(chunkId > YAFFS_MAX_CHUNK_ID)
1021 // sprintf(str,"Bad chunkId %d",chunkId);
1026 // First check we're tall enough (ie enough topLevel)
1028 x = chunkId >> (/*dev->chunkGroupBits + */YAFFS_TNODES_LEVEL0_BITS);
1029 requiredTallness = 0;
1032 x >>= YAFFS_TNODES_INTERNAL_BITS;
1036 //T((TSTR(" required=%d"),requiredTallness));
1039 if(requiredTallness > fStruct->topLevel)
1041 // Not tall enough,gotta make the tree taller
1042 for(i = fStruct->topLevel; i < requiredTallness; i++)
1044 //T((TSTR(" add new top")));
1046 tn = yaffs_GetTnode(dev);
1050 tn->internal[0] = fStruct->top;
1055 T(YAFFS_TRACE_ERROR,(TSTR("yaffs: no more tnodes" TENDSTR)));
1059 fStruct->topLevel = requiredTallness;
1063 // Traverse down to level 0, adding anything we need
1065 l = fStruct->topLevel;
1069 x = (chunkId >> (/*dev->chunkGroupBits + */YAFFS_TNODES_LEVEL0_BITS + (l-1) * YAFFS_TNODES_INTERNAL_BITS)) &
1070 YAFFS_TNODES_INTERNAL_MASK;
1072 //T((TSTR(" [%d:%d]"),l,i));
1074 if(!tn->internal[x])
1076 //T((TSTR(" added")));
1078 tn->internal[x] = yaffs_GetTnode(dev);
1081 tn = tn->internal[x];
1092 int yaffs_FindChunkInGroup(yaffs_Device *dev, int theChunk, yaffs_ExtendedTags *tags, int objectId, int chunkInInode)
1097 for(j = 0; theChunk && j < dev->chunkGroupSize; j++)
1099 if(yaffs_CheckChunkBit(dev,theChunk / dev->nChunksPerBlock,theChunk % dev->nChunksPerBlock))
1101 yaffs_ReadChunkWithTagsFromNAND(dev,theChunk,NULL,tags);
1102 if(yaffs_TagsMatch(tags,objectId,chunkInInode))
1114 // DeleteWorker scans backwards through the tnode tree and deletes all the
1115 // chunks and tnodes in the file
1116 // Returns 1 if the tree was deleted. Returns 0 if it stopped early due to hitting the limit and the delete is incomplete.
1118 static int yaffs_DeleteWorker(yaffs_Object *in, yaffs_Tnode *tn, __u32 level, int chunkOffset,int *limit)
1123 yaffs_ExtendedTags tags;
1125 yaffs_Device *dev = in->myDev;
1135 for(i = YAFFS_NTNODES_INTERNAL -1; allDone && i >= 0; i--)
1139 if(limit && (*limit) < 0)
1145 allDone = yaffs_DeleteWorker(in,tn->internal[i],level - 1,
1146 (chunkOffset << YAFFS_TNODES_INTERNAL_BITS ) + i ,limit);
1150 yaffs_FreeTnode(dev,tn->internal[i]);
1151 tn->internal[i] = NULL;
1156 return (allDone) ? 1 : 0;
1162 for(i = YAFFS_NTNODES_LEVEL0 -1; i >= 0 && !hitLimit; i--)
1167 chunkInInode = (chunkOffset << YAFFS_TNODES_LEVEL0_BITS ) + i;
1169 theChunk = tn->level0[i] << dev->chunkGroupBits;
1171 foundChunk = yaffs_FindChunkInGroup(dev,theChunk,&tags,in->objectId,chunkInInode);
1175 yaffs_DeleteChunk(dev,foundChunk,1,__LINE__);
1192 return (i < 0) ? 1 : 0;
1204 static void yaffs_SoftDeleteChunk(yaffs_Device *dev, int chunk)
1207 yaffs_BlockInfo *theBlock;
1209 T(YAFFS_TRACE_DELETION,(TSTR("soft delete chunk %d" TENDSTR),chunk));
1211 theBlock = yaffs_GetBlockInfo(dev, chunk/dev->nChunksPerBlock);
1214 theBlock->softDeletions++;
1218 // SoftDeleteWorker scans backwards through the tnode tree and soft deletes all the chunks in the file.
1219 // All soft deleting does is increment the block's softdelete count and pulls the chunk out
1221 // THus, essentially this is the same as DeleteWorker except that the chunks are soft deleted.
1223 static int yaffs_SoftDeleteWorker(yaffs_Object *in, yaffs_Tnode *tn, __u32 level, int chunkOffset)
1228 yaffs_Device *dev = in->myDev;
1236 for(i = YAFFS_NTNODES_INTERNAL -1; allDone && i >= 0; i--)
1240 allDone = yaffs_SoftDeleteWorker(in,tn->internal[i],level - 1,
1241 (chunkOffset << YAFFS_TNODES_INTERNAL_BITS ) + i);
1244 yaffs_FreeTnode(dev,tn->internal[i]);
1245 tn->internal[i] = NULL;
1249 //Hoosterman... how could this happen.
1253 return (allDone) ? 1 : 0;
1258 for(i = YAFFS_NTNODES_LEVEL0 -1; i >=0; i--)
1262 // Note this does not find the real chunk, only the chunk group.
1263 // We make an assumption that a chunk group is niot larger than a block.
1264 theChunk = (tn->level0[i] << dev->chunkGroupBits);
1266 yaffs_SoftDeleteChunk(dev,theChunk);
1283 static void yaffs_SoftDeleteFile(yaffs_Object *obj)
1286 obj->variantType == YAFFS_OBJECT_TYPE_FILE &&
1289 if(obj->nDataChunks <= 0)
1291 // Empty file with no duplicate object headers, just delete it immediately
1292 yaffs_FreeTnode(obj->myDev,obj->variant.fileVariant.top);
1293 obj->variant.fileVariant.top = NULL;
1294 T(YAFFS_TRACE_TRACING,(TSTR("yaffs: Deleting empty file %d" TENDSTR),obj->objectId));
1295 yaffs_DoGenericObjectDeletion(obj);
1299 yaffs_SoftDeleteWorker(obj, obj->variant.fileVariant.top, obj->variant.fileVariant.topLevel, 0);
1300 obj->softDeleted = 1;
1309 // Pruning removes any part of the file structure tree that is beyond the
1310 // bounds of the file (ie that does not point to chunks).
1312 // A file should only get pruned when its size is reduced.
1314 // Before pruning, the chunks must be pulled from the tree and the
1315 // level 0 tnode entries must be zeroed out.
1316 // Could also use this for file deletion, but that's probably better handled
1317 // by a special case.
1319 // yaffs_PruneWorker should only be called by yaffs_PruneFileStructure()
1321 static yaffs_Tnode *yaffs_PruneWorker(yaffs_Device *dev, yaffs_Tnode *tn, __u32 level, int del0)
1330 for(i = 0; i < YAFFS_NTNODES_INTERNAL; i++)
1332 if(tn->internal[i] && level > 0)
1334 tn->internal[i] = yaffs_PruneWorker(dev,tn->internal[i],level - 1, ( i == 0) ? del0 : 1);
1343 if(hasData == 0 && del0)
1345 // Free and return NULL
1347 yaffs_FreeTnode(dev,tn);
1357 static int yaffs_PruneFileStructure(yaffs_Device *dev, yaffs_FileStructure *fStruct)
1364 if(fStruct->topLevel > 0)
1366 fStruct->top = yaffs_PruneWorker(dev,fStruct->top, fStruct->topLevel,0);
1368 // Now we have a tree with all the non-zero branches NULL but the height
1369 // is the same as it was.
1370 // Let's see if we can trim internal tnodes to shorten the tree.
1371 // We can do this if only the 0th element in the tnode is in use
1372 // (ie all the non-zero are NULL)
1374 while(fStruct->topLevel && !done)
1379 for(i = 1; i <YAFFS_NTNODES_INTERNAL; i++)
1389 fStruct->top = tn->internal[0];
1390 fStruct->topLevel--;
1391 yaffs_FreeTnode(dev,tn);
1407 /////////////////////// End of File Structure functions. /////////////////
1409 // yaffs_CreateFreeObjects creates a bunch more objects and
1410 // adds them to the object free list.
1411 static int yaffs_CreateFreeObjects(yaffs_Device *dev, int nObjects)
1414 yaffs_Object *newObjects;
1415 yaffs_ObjectList *list;
1417 if(nObjects < 1) return YAFFS_OK;
1419 // make these things
1421 newObjects = YMALLOC(nObjects * sizeof(yaffs_Object));
1425 T(YAFFS_TRACE_ALLOCATE,(TSTR("yaffs: Could not allocate more objects" TENDSTR)));
1429 // Hook them into the free list
1430 for(i = 0; i < nObjects - 1; i++)
1432 newObjects[i].siblings.next = (struct list_head *)(&newObjects[i+1]);
1435 newObjects[nObjects - 1].siblings.next = (void *)dev->freeObjects;
1436 dev->freeObjects = newObjects;
1437 dev->nFreeObjects+= nObjects;
1438 dev->nObjectsCreated+= nObjects;
1440 // Now add this bunch of Objects to a list for freeing up.
1442 list = YMALLOC(sizeof(yaffs_ObjectList));
1445 T(YAFFS_TRACE_ALLOCATE,(TSTR("Could not add objects to management list" TENDSTR)));
1449 list->objects = newObjects;
1450 list->next = dev->allocatedObjectList;
1451 dev->allocatedObjectList = list;
1460 // AllocateEmptyObject gets us a clean Object. Tries to make allocate more if we run out
1461 static yaffs_Object *yaffs_AllocateEmptyObject(yaffs_Device *dev)
1463 yaffs_Object *tn = NULL;
1465 // If there are none left make more
1466 if(!dev->freeObjects)
1468 yaffs_CreateFreeObjects(dev,YAFFS_ALLOCATION_NOBJECTS);
1471 if(dev->freeObjects)
1473 tn = dev->freeObjects;
1474 dev->freeObjects = (yaffs_Object *)(dev->freeObjects->siblings.next);
1475 dev->nFreeObjects--;
1477 // Now sweeten it up...
1479 memset(tn,0,sizeof(yaffs_Object));
1482 tn->variantType = YAFFS_OBJECT_TYPE_UNKNOWN;
1483 INIT_LIST_HEAD(&(tn->hardLinks));
1484 INIT_LIST_HEAD(&(tn->hashLink));
1485 INIT_LIST_HEAD(&tn->siblings);
1487 // Add it to the lost and found directory.
1488 // NB Can't put root or lostNFound in lostNFound so
1489 // check if lostNFound exists first
1490 if(dev->lostNFoundDir)
1492 yaffs_AddObjectToDirectory(dev->lostNFoundDir,tn);
1500 static yaffs_Object *yaffs_CreateFakeDirectory(yaffs_Device *dev,int number,__u32 mode)
1503 yaffs_Object *obj = yaffs_CreateNewObject(dev,number,YAFFS_OBJECT_TYPE_DIRECTORY);
1506 obj->fake = 1; // it is fake so it has no NAND presence...
1507 obj->renameAllowed= 0; // ... and we're not allowed to rename it...
1508 obj->unlinkAllowed= 0; // ... or unlink it
1511 obj->st_mode = mode;
1513 obj->chunkId = 0; // Not a valid chunk.
1521 static void yaffs_UnhashObject(yaffs_Object *tn)
1524 yaffs_Device *dev = tn->myDev;
1527 // If it is still linked into the bucket list, free from the list
1528 if(!list_empty(&tn->hashLink))
1530 list_del_init(&tn->hashLink);
1531 bucket = yaffs_HashFunction(tn->objectId);
1532 dev->objectBucket[bucket].count--;
1538 // FreeObject frees up a Object and puts it back on the free list
1539 static void yaffs_FreeObject(yaffs_Object *tn)
1542 yaffs_Device *dev = tn->myDev;
1547 // We're still hooked up to a cached inode.
1548 // Don't delete now, but mark for later deletion
1549 tn->deferedFree = 1;
1554 yaffs_UnhashObject(tn);
1556 // Link into the free list.
1557 tn->siblings.next = (struct list_head *)(dev->freeObjects);
1558 dev->freeObjects = tn;
1559 dev->nFreeObjects++;
1566 void yaffs_HandleDeferedFree(yaffs_Object *obj)
1568 if(obj->deferedFree)
1570 yaffs_FreeObject(obj);
1578 static void yaffs_DeinitialiseObjects(yaffs_Device *dev)
1580 // Free the list of allocated Objects
1582 yaffs_ObjectList *tmp;
1584 while( dev->allocatedObjectList)
1586 tmp = dev->allocatedObjectList->next;
1587 YFREE(dev->allocatedObjectList->objects);
1588 YFREE(dev->allocatedObjectList);
1590 dev->allocatedObjectList = tmp;
1593 dev->freeObjects = NULL;
1594 dev->nFreeObjects = 0;
1597 static void yaffs_InitialiseObjects(yaffs_Device *dev)
1601 dev->allocatedObjectList = NULL;
1602 dev->freeObjects = NULL;
1603 dev->nFreeObjects = 0;
1605 for(i = 0; i < YAFFS_NOBJECT_BUCKETS; i++)
1607 INIT_LIST_HEAD(&dev->objectBucket[i].list);
1608 dev->objectBucket[i].count = 0;
1618 int yaffs_FindNiceObjectBucket(yaffs_Device *dev)
1623 int lowest = 999999;
1626 // First let's see if we can find one that's empty.
1628 for(i = 0; i < 10 && lowest > 0; i++)
1631 x %= YAFFS_NOBJECT_BUCKETS;
1632 if(dev->objectBucket[x].count < lowest)
1634 lowest = dev->objectBucket[x].count;
1640 // If we didn't find an empty list, then try
1641 // looking a bit further for a short one
1643 for(i = 0; i < 10 && lowest > 3; i++)
1646 x %= YAFFS_NOBJECT_BUCKETS;
1647 if(dev->objectBucket[x].count < lowest)
1649 lowest = dev->objectBucket[x].count;
1658 static int yaffs_CreateNewObjectNumber(yaffs_Device *dev)
1660 int bucket = yaffs_FindNiceObjectBucket(dev);
1662 // Now find an object value that has not already been taken
1663 // by scanning the list.
1666 struct list_head *i;
1668 __u32 n = (__u32)bucket;
1670 //yaffs_CheckObjectHashSanity();
1675 n += YAFFS_NOBJECT_BUCKETS;
1676 if(1 ||dev->objectBucket[bucket].count > 0)
1678 list_for_each(i,&dev->objectBucket[bucket].list)
1680 // If there is already one in the list
1681 if(i && list_entry(i, yaffs_Object,hashLink)->objectId == n)
1689 //T(("bucket %d count %d inode %d\n",bucket,yaffs_objectBucket[bucket].count,n);
1694 void yaffs_HashObject(yaffs_Object *in)
1696 int bucket = yaffs_HashFunction(in->objectId);
1697 yaffs_Device *dev = in->myDev;
1699 if(!list_empty(&in->hashLink))
1705 list_add(&in->hashLink,&dev->objectBucket[bucket].list);
1706 dev->objectBucket[bucket].count++;
1710 yaffs_Object *yaffs_FindObjectByNumber(yaffs_Device *dev,__u32 number)
1712 int bucket = yaffs_HashFunction(number);
1713 struct list_head *i;
1716 list_for_each(i,&dev->objectBucket[bucket].list)
1718 // Look if it is in the list
1721 in = list_entry(i, yaffs_Object,hashLink);
1722 if(in->objectId == number)
1725 // Don't tell the VFS about this one if it is defered free
1740 yaffs_Object *yaffs_CreateNewObject(yaffs_Device *dev,int number,yaffs_ObjectType type)
1743 yaffs_Object *theObject;
1747 number = yaffs_CreateNewObjectNumber(dev);
1750 theObject = yaffs_AllocateEmptyObject(dev);
1754 theObject->fake = 0;
1755 theObject->renameAllowed = 1;
1756 theObject->unlinkAllowed = 1;
1757 theObject->objectId = number;
1758 yaffs_HashObject(theObject);
1759 theObject->variantType = type;
1760 #ifdef CONFIG_YAFFS_WINCE
1761 yfsd_WinFileTimeNow(theObject->win_atime);
1762 theObject->win_ctime[0] = theObject->win_mtime[0] = theObject->win_atime[0];
1763 theObject->win_ctime[1] = theObject->win_mtime[1] = theObject->win_atime[1];
1767 theObject->st_atime = theObject->st_mtime = theObject->st_ctime = Y_CURRENT_TIME;
1771 case YAFFS_OBJECT_TYPE_FILE:
1772 theObject->variant.fileVariant.fileSize = 0;
1773 theObject->variant.fileVariant.scannedFileSize = 0;
1774 theObject->variant.fileVariant.shrinkSize = 0xFFFFFFFF; // max __u32
1775 theObject->variant.fileVariant.topLevel = 0;
1776 theObject->variant.fileVariant.top = yaffs_GetTnode(dev);
1778 case YAFFS_OBJECT_TYPE_DIRECTORY:
1779 INIT_LIST_HEAD(&theObject->variant.directoryVariant.children);
1781 case YAFFS_OBJECT_TYPE_SYMLINK:
1782 // No action required
1784 case YAFFS_OBJECT_TYPE_HARDLINK:
1785 // No action required
1787 case YAFFS_OBJECT_TYPE_SPECIAL:
1788 // No action required
1790 case YAFFS_OBJECT_TYPE_UNKNOWN:
1791 // todo this should not happen
1799 yaffs_Object *yaffs_FindOrCreateObjectByNumber(yaffs_Device *dev, int number,yaffs_ObjectType type)
1801 yaffs_Object *theObject = NULL;
1805 theObject = yaffs_FindObjectByNumber(dev,number);
1810 theObject = yaffs_CreateNewObject(dev,number,type);
1817 YCHAR *yaffs_CloneString(const YCHAR *str)
1819 YCHAR *newStr = NULL;
1823 newStr = YMALLOC((yaffs_strlen(str) + 1) * sizeof(YCHAR));
1824 yaffs_strcpy(newStr,str);
1832 // Mknod (create) a new object.
1833 // equivalentObject only has meaning for a hard link;
1834 // aliasString only has meaning for a sumlink.
1835 // rdev only has meaning for devices (a subset of special objects)
1836 yaffs_Object *yaffs_MknodObject( yaffs_ObjectType type,
1837 yaffs_Object *parent,
1842 yaffs_Object *equivalentObject,
1843 const YCHAR *aliasString,
1848 yaffs_Device *dev = parent->myDev;
1850 // Check if the entry exists. If it does then fail the call since we don't want a dup.
1851 if(yaffs_FindObjectByName(parent,name))
1856 in = yaffs_CreateNewObject(dev,-1,type);
1862 in->variantType = type;
1866 #ifdef CONFIG_YAFFS_WINCE
1867 yfsd_WinFileTimeNow(in->win_atime);
1868 in->win_ctime[0] = in->win_mtime[0] = in->win_atime[0];
1869 in->win_ctime[1] = in->win_mtime[1] = in->win_atime[1];
1872 in->st_atime = in->st_mtime = in->st_ctime = Y_CURRENT_TIME;
1878 in->nDataChunks = 0;
1880 yaffs_SetObjectName(in,name);
1883 yaffs_AddObjectToDirectory(parent,in);
1885 in->myDev = parent->myDev;
1890 case YAFFS_OBJECT_TYPE_SYMLINK:
1891 in->variant.symLinkVariant.alias = yaffs_CloneString(aliasString);
1893 case YAFFS_OBJECT_TYPE_HARDLINK:
1894 in->variant.hardLinkVariant.equivalentObject = equivalentObject;
1895 in->variant.hardLinkVariant.equivalentObjectId = equivalentObject->objectId;
1896 list_add(&in->hardLinks,&equivalentObject->hardLinks);
1898 case YAFFS_OBJECT_TYPE_FILE: // do nothing
1899 case YAFFS_OBJECT_TYPE_DIRECTORY: // do nothing
1900 case YAFFS_OBJECT_TYPE_SPECIAL: // do nothing
1901 case YAFFS_OBJECT_TYPE_UNKNOWN:
1905 if(/*yaffs_GetNumberOfFreeChunks(dev) <= 0 || */
1906 yaffs_UpdateObjectHeader(in,name,0,0) < 0)
1908 // Could not create the object header, fail the creation
1909 yaffs_DestroyObject(in);
1918 yaffs_Object *yaffs_MknodFile(yaffs_Object *parent,const YCHAR *name, __u32 mode, __u32 uid, __u32 gid)
1920 return yaffs_MknodObject(YAFFS_OBJECT_TYPE_FILE,parent,name,mode,uid,gid,NULL,NULL,0);
1923 yaffs_Object *yaffs_MknodDirectory(yaffs_Object *parent,const YCHAR *name, __u32 mode, __u32 uid, __u32 gid)
1925 return yaffs_MknodObject(YAFFS_OBJECT_TYPE_DIRECTORY,parent,name,mode,uid,gid,NULL,NULL,0);
1928 yaffs_Object *yaffs_MknodSpecial(yaffs_Object *parent,const YCHAR *name, __u32 mode, __u32 uid, __u32 gid, __u32 rdev)
1930 return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SPECIAL,parent,name,mode,uid,gid,NULL,NULL,rdev);
1933 yaffs_Object *yaffs_MknodSymLink(yaffs_Object *parent,const YCHAR *name, __u32 mode, __u32 uid, __u32 gid,const YCHAR *alias)
1935 return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SYMLINK,parent,name,mode,uid,gid,NULL,alias,0);
1938 // NB yaffs_Link returns the object id of the equivalent object.
1939 yaffs_Object *yaffs_Link(yaffs_Object *parent, const YCHAR *name, yaffs_Object *equivalentObject)
1941 // Get the real object in case we were fed a hard link as an equivalent object
1942 equivalentObject = yaffs_GetEquivalentObject(equivalentObject);
1944 if(yaffs_MknodObject(YAFFS_OBJECT_TYPE_HARDLINK,parent,name,0,0,0,equivalentObject,NULL,0))
1946 return equivalentObject;
1956 static int yaffs_ChangeObjectName(yaffs_Object *obj, yaffs_Object *newDir, const YCHAR *newName,int force)
1963 newDir = obj->parent; // use the old directory
1966 if(newDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
1968 T(YAFFS_TRACE_ALWAYS,(TSTR("tragendy: yaffs_ChangeObjectName: newDir is not a directory"TENDSTR)));
1972 // TODO: Do we need this different handling for YAFFS2 and YAFFS1??
1973 if(obj->myDev->isYaffs2)
1975 unlinkOp = (newDir == obj->myDev->unlinkedDir);
1979 unlinkOp = (newDir == obj->myDev->unlinkedDir && obj->variantType == YAFFS_OBJECT_TYPE_FILE);
1982 deleteOp = (newDir == obj->myDev->deletedDir);
1984 // If the object is a file going into the unlinked directory, then it is OK to just stuff it in since
1985 // duplicate names are allowed.
1986 // Otherwise only proceed if the new name does not exist and if we're putting it into a directory.
1990 !yaffs_FindObjectByName(newDir,newName)) &&
1991 newDir->variantType == YAFFS_OBJECT_TYPE_DIRECTORY)
1993 yaffs_SetObjectName(obj,newName);
1996 yaffs_AddObjectToDirectory(newDir,obj);
1998 if(unlinkOp) obj->unlinked = 1;
2000 // If it is a deletion then we mark it as a shrink for gc purposes.
2001 if(yaffs_UpdateObjectHeader(obj,newName,0,deleteOp) >= 0)
2012 int yaffs_RenameObject(yaffs_Object *oldDir, const YCHAR *oldName, yaffs_Object *newDir, const YCHAR *newName)
2017 #ifdef CONFIG_YAFFS_CASE_INSENSITIVE
2018 // Special case for case insemsitive systems (eg. WinCE).
2019 // While look-up is case insensitive, the name isn't.
2020 // THerefore we might want to change x.txt to X.txt
2021 if(oldDir == newDir && yaffs_strcmp(oldName,newName) == 0)
2027 obj = yaffs_FindObjectByName(oldDir,oldName);
2028 if(obj && obj->renameAllowed)
2030 return yaffs_ChangeObjectName(obj,newDir,newName,force);
2038 static int yaffs_CheckObjectHashSanity(yaffs_Device *dev)
2040 // Scan the buckets and check that the lists
2041 // have as many members as the count says there are
2044 struct list_head *j;
2047 for(bucket = 0; bucket < YAFFS_NOBJECT_BUCKETS; bucket++)
2051 list_for_each(j,&dev->objectBucket[bucket].list)
2056 if(countEm != dev->objectBucket[bucket].count)
2058 T(YAFFS_TRACE_ERROR,(TSTR("Inode hash inconsistency" TENDSTR)));
2067 void yaffs_ObjectTest(yaffs_Device *dev)
2069 yaffs_Object *in[1000];
2071 yaffs_Object *inold[1000];
2075 memset(in,0,1000*sizeof(yaffs_Object *));
2076 memset(inold,0,1000*sizeof(yaffs_Object *));
2078 yaffs_CheckObjectHashSanity(dev);
2080 for(j = 0; j < 10; j++)
2084 for(i = 0; i < 1000; i++)
2086 in[i] = yaffs_CreateNewObject(dev,-1,YAFFS_OBJECT_TYPE_FILE);
2089 YINFO("No more inodes");
2093 inNo[i] = in[i]->objectId;
2097 for(i = 0; i < 1000; i++)
2099 if(yaffs_FindObjectByNumber(dev,inNo[i]) != in[i])
2101 //T(("Differnce in look up test\n"));
2105 // T(("Look up ok\n"));
2109 yaffs_CheckObjectHashSanity(dev);
2111 for(i = 0; i < 1000; i+=3)
2113 yaffs_FreeObject(in[i]);
2118 yaffs_CheckObjectHashSanity(dev);
2125 /////////////////////////// Block Management and Page Allocation ///////////////////
2128 static int yaffs_InitialiseBlocks(yaffs_Device *dev,int nBlocks)
2130 dev->allocationBlock = -1; // force it to get a new one
2131 //Todo we're assuming the malloc will pass.
2132 dev->blockInfo = YMALLOC(nBlocks * sizeof(yaffs_BlockInfo));
2133 // Set up dynamic blockinfo stuff.
2134 dev->chunkBitmapStride = (dev->nChunksPerBlock+7)/8;
2135 dev->chunkBits = YMALLOC(dev->chunkBitmapStride * nBlocks);
2136 if(dev->blockInfo && dev->chunkBits)
2138 memset(dev->blockInfo,0,nBlocks * sizeof(yaffs_BlockInfo));
2139 memset(dev->chunkBits,0,dev->chunkBitmapStride * nBlocks);
2147 static void yaffs_DeinitialiseBlocks(yaffs_Device *dev)
2149 YFREE(dev->blockInfo);
2150 dev->blockInfo = NULL;
2151 YFREE(dev->chunkBits);
2152 dev->chunkBits = NULL;
2156 static int yaffs_BlockNotDisqualifiedFromGC(yaffs_Device *dev, yaffs_BlockInfo *bi)
2162 if(!dev->isYaffs2) return 1; // disqualification only applies to yaffs2.
2164 if(!bi->hasShrinkHeader) return 1; // can gc
2167 // Find the oldest dirty sequence number if we don't know it and save it
2168 // so we don't have to keep recomputing it.
2169 if(!dev->oldestDirtySequence)
2171 seq = dev->sequenceNumber;
2173 for(i = dev->startBlock; i <= dev->endBlock; i++)
2175 b = yaffs_GetBlockInfo(dev,i);
2176 if(b->blockState == YAFFS_BLOCK_STATE_FULL &&
2177 (b->pagesInUse - b->softDeletions )< dev->nChunksPerBlock &&
2178 b->sequenceNumber < seq)
2180 seq = b->sequenceNumber;
2183 dev->oldestDirtySequence = seq;
2187 // Can't do gc of this block if there are any blocks older than this one that have
2189 return (bi->sequenceNumber <= dev->oldestDirtySequence);
2196 // FindDiretiestBlock is used to select the dirtiest block (or close enough)
2197 // for garbage collection.
2202 static int yaffs_FindBlockForGarbageCollection(yaffs_Device *dev,int aggressive)
2205 int b = dev->currentDirtyChecker;
2211 yaffs_BlockInfo *bi;
2212 static int nonAggressiveSkip = 0;
2214 // If we're doing aggressive GC then we are happy to take a less-dirty block, and
2216 // else (we're doing a leasurely gc), then we only bother to do this if the
2217 // block has only a few pages in use.
2220 nonAggressiveSkip--;
2222 if(!aggressive &&(nonAggressiveSkip > 0))
2227 pagesInUse = (aggressive)? dev->nChunksPerBlock : YAFFS_PASSIVE_GC_CHUNKS + 1;
2230 iterations = dev->endBlock - dev->startBlock + 1;
2234 iterations = dev->endBlock - dev->startBlock + 1;
2235 iterations = iterations / 16;
2236 if(iterations > 200)
2242 for(i = 0; i <= iterations && pagesInUse > 0 ; i++)
2245 if ( b < dev->startBlock || b > dev->endBlock)
2247 b = dev->startBlock;
2250 if(b < dev->startBlock || b > dev->endBlock)
2252 T(YAFFS_TRACE_ERROR,(TSTR("**>> Block %d is not valid" TENDSTR),b));
2256 bi = yaffs_GetBlockInfo(dev,b);
2258 if(bi->blockState == YAFFS_BLOCK_STATE_FULL &&
2259 (bi->pagesInUse - bi->softDeletions )< pagesInUse &&
2260 yaffs_BlockNotDisqualifiedFromGC(dev,bi))
2263 pagesInUse = (bi->pagesInUse - bi->softDeletions);
2267 dev->currentDirtyChecker = b;
2271 T(YAFFS_TRACE_GC,(TSTR("GC Selected block %d with %d free" TENDSTR),dirtiest,dev->nChunksPerBlock - pagesInUse));
2274 dev->oldestDirtySequence = 0; // clear this
2278 nonAggressiveSkip = 4;
2285 static void yaffs_BlockBecameDirty(yaffs_Device *dev,int blockNo)
2287 yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev,blockNo);
2291 // If the block is still healthy erase it and mark as clean.
2292 // If the block has had a data failure, then retire it.
2293 bi->blockState = YAFFS_BLOCK_STATE_DIRTY;
2295 if(!bi->needsRetiring)
2297 erasedOk = yaffs_EraseBlockInNAND(dev,blockNo);
2300 dev->nErasureFailures++;
2301 T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,(TSTR("**>> Erasure failed %d" TENDSTR),blockNo));
2305 if(erasedOk && (yaffs_traceMask & YAFFS_TRACE_ERASE))
2308 for(i = 0; i < dev->nChunksPerBlock; i++)
2310 if(!yaffs_CheckChunkErased(dev,blockNo * dev->nChunksPerBlock + i))
2312 T(YAFFS_TRACE_ERROR,(TSTR(">>Block %d erasure supposedly OK, but chunk %d not erased" TENDSTR),blockNo,i));
2320 bi->blockState = YAFFS_BLOCK_STATE_EMPTY;
2321 dev->nErasedBlocks++;
2323 bi->softDeletions = 0;
2324 bi->hasShrinkHeader=0;
2325 yaffs_ClearChunkBits(dev,blockNo);
2327 T(YAFFS_TRACE_ERASE,(TSTR("Erased block %d" TENDSTR),blockNo));
2331 yaffs_RetireBlock(dev,blockNo);
2332 T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,(TSTR("**>> Block %d retired" TENDSTR),blockNo));
2337 static void yaffs_DumpBlockStats(yaffs_Device *dev)
2340 yaffs_BlockInfo *bi;
2342 for(i= dev->startBlock; i <=dev->endBlock; i++)
2344 bi = yaffs_GetBlockInfo(dev,i);
2345 T(YAFFS_TRACE_ALLOCATE,(TSTR("%3d state %d shrink %d inuse %d/%d seq %d pages"),i,
2346 bi->blockState,bi->hasShrinkHeader,bi->pagesInUse,bi->softDeletions,bi->sequenceNumber));
2348 for(j = 0; j < dev->nChunksPerBlock; j++)
2350 if(yaffs_CheckChunkBit(dev,i,j))
2352 T(YAFFS_TRACE_ALLOCATE,(TSTR(" %d"),j));
2356 T(YAFFS_TRACE_ALLOCATE,(TSTR(" " TENDSTR)));
2363 static int yaffs_FindBlockForAllocation(yaffs_Device *dev)
2367 yaffs_BlockInfo *bi;
2372 if(j < 0 || j > 100)
2375 yaffs_DumpBlockStats(dev);
2380 if(dev->nErasedBlocks < 1)
2382 // Hoosterman we've got a problem.
2383 // Can't get space to gc
2384 T(YAFFS_TRACE_ERROR, (TSTR("yaffs tragedy: no more eraased blocks" TENDSTR)));
2389 // Find an empty block.
2391 for(i = dev->startBlock; i <= dev->endBlock; i++)
2393 dev->allocationBlockFinder++;
2394 if(dev->allocationBlockFinder < dev->startBlock || dev->allocationBlockFinder> dev->endBlock)
2396 dev->allocationBlockFinder = dev->startBlock;
2399 bi = yaffs_GetBlockInfo(dev,dev->allocationBlockFinder);
2401 if(bi->blockState == YAFFS_BLOCK_STATE_EMPTY)
2403 bi->blockState = YAFFS_BLOCK_STATE_ALLOCATING;
2404 dev->sequenceNumber++;
2405 bi->sequenceNumber = dev->sequenceNumber;
2406 dev->nErasedBlocks--;
2407 T(YAFFS_TRACE_ALLOCATE,(TSTR("Allocated block %d, seq %d, %d left" TENDSTR),dev->allocationBlockFinder,dev->sequenceNumber, dev->nErasedBlocks));
2408 return dev->allocationBlockFinder;
2413 T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs tragedy: no more eraased blocks, but there should have been %d" TENDSTR),dev->nErasedBlocks));
2424 static int yaffs_AllocateChunk(yaffs_Device *dev,int useReserve)
2427 yaffs_BlockInfo *bi;
2429 if(dev->allocationBlock < 0)
2431 // Get next block to allocate off
2432 dev->allocationBlock = yaffs_FindBlockForAllocation(dev);
2433 dev->allocationPage = 0;
2436 if(!useReserve && dev->nErasedBlocks </*=*/ dev->nReservedBlocks)
2438 // Not enough space to allocate unless we're allowed to use the reserve.
2442 if(dev->nErasedBlocks < dev->nReservedBlocks && dev->allocationPage == 0)
2444 T(YAFFS_TRACE_ALLOCATE,(TSTR("Allocating reserve" TENDSTR)));
2448 // Next page please....
2449 if(dev->allocationBlock >= 0)
2451 bi = yaffs_GetBlockInfo(dev,dev->allocationBlock);
2453 retVal = (dev->allocationBlock * dev->nChunksPerBlock) +
2454 dev->allocationPage;
2456 yaffs_SetChunkBit(dev,dev->allocationBlock,dev->allocationPage);
2458 dev->allocationPage++;
2462 // If the block is full set the state to full
2463 if(dev->allocationPage >= dev->nChunksPerBlock)
2465 bi->blockState = YAFFS_BLOCK_STATE_FULL;
2466 dev->allocationBlock = -1;
2473 T(YAFFS_TRACE_ERROR,(TSTR("!!!!!!!!! Allocator out !!!!!!!!!!!!!!!!!" TENDSTR)));
2479 // To determine if we have enough space we just look at the
2480 // number of erased blocks.
2481 // The cache is allowed to use reserved blocks.
2483 static int yaffs_CheckSpaceForChunkCache(yaffs_Device *dev)
2485 return (dev->nErasedBlocks >= dev->nReservedBlocks);
2489 static int yaffs_GetErasedChunks(yaffs_Device *dev)
2493 n = dev->nErasedBlocks * dev->nChunksPerBlock;
2495 if(dev->allocationBlock> 0)
2497 n += (dev->nChunksPerBlock - dev->allocationPage);
2504 int yaffs_GarbageCollectBlock(yaffs_Device *dev,int block)
2510 int retVal = YAFFS_OK;
2514 int chunksBefore = yaffs_GetErasedChunks(dev);
2517 yaffs_ExtendedTags tags;
2519 yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev,block);
2521 yaffs_Object *object;
2523 bi->blockState = YAFFS_BLOCK_STATE_COLLECTING;
2525 T(YAFFS_TRACE_TRACING,(TSTR("Collecting block %d, in use %d, shrink %d, " TENDSTR),block,bi->pagesInUse,bi->hasShrinkHeader));
2526 //T(("Collecting block %d n %d bits %x\n",block, bi->pagesInUse, bi->pageBits));
2528 bi->hasShrinkHeader = 0; // clear the flag so that the block can erase
2531 if(!yaffs_StillSomeChunkBits(dev,block))
2533 T(YAFFS_TRACE_TRACING,(TSTR("Collecting block %d that has no chunks in use" TENDSTR),block));
2534 yaffs_BlockBecameDirty(dev,block);
2539 __u8 *buffer = yaffs_GetTempBuffer(dev,__LINE__);
2541 for(chunkInBlock = 0,oldChunk = block * dev->nChunksPerBlock;
2542 chunkInBlock < dev->nChunksPerBlock && yaffs_StillSomeChunkBits(dev,block);
2543 chunkInBlock++, oldChunk++ )
2545 if(yaffs_CheckChunkBit(dev,block,chunkInBlock))
2548 // This page is in use and might need to be copied off
2552 //T(("copying page %x from %d to %d\n",mask,oldChunk,newChunk));
2554 yaffs_InitialiseTags(&tags);
2556 yaffs_ReadChunkWithTagsFromNAND(dev,oldChunk,buffer, &tags);
2558 object = yaffs_FindObjectByNumber(dev,tags.objectId);
2560 T(YAFFS_TRACE_GC_DETAIL,(TSTR("Collecting page %d, %d %d %d " TENDSTR),chunkInBlock,tags.objectId,tags.chunkId,tags.byteCount));
2564 T(YAFFS_TRACE_ERROR,(TSTR("page %d in gc has no object " TENDSTR),oldChunk));
2567 if(object && object->deleted && tags.chunkId != 0)
2569 // Data chunk in a deleted file, throw it away
2570 // It's a deleted data chunk,
2571 // No need to copy this, just forget about it and fix up the
2574 //yaffs_PutChunkIntoFile(object, tags.chunkId, 0,0);
2575 object->nDataChunks--;
2577 if(object->nDataChunks <= 0)
2579 // remeber to clean up the object
2580 dev->gcCleanupList[cleanups] = tags.objectId;
2585 else if( 0 /* Todo object && object->deleted && object->nDataChunks == 0 */)
2587 // Deleted object header with no data chunks.
2588 // Can be discarded and the file deleted.
2589 object->chunkId = 0;
2590 yaffs_FreeTnode(object->myDev,object->variant.fileVariant.top);
2591 object->variant.fileVariant.top = NULL;
2592 yaffs_DoGenericObjectDeletion(object);
2597 // It's either a data chunk in a live file or
2598 // an ObjectHeader, so we're interested in it.
2599 // NB Need to keep the ObjectHeaders of deleted files
2600 // until the whole file has been deleted off
2601 tags.serialNumber++;
2605 newChunk = yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &tags,1);
2609 retVal = YAFFS_FAIL;
2614 // Ok, now fix up the Tnodes etc.
2616 if(tags.chunkId == 0)
2619 object->chunkId = newChunk;
2620 object->serial = tags.serialNumber;
2624 // It's a data chunk
2625 yaffs_PutChunkIntoFile(object, tags.chunkId, newChunk,0);
2630 yaffs_DeleteChunk(dev,oldChunk,markNAND,__LINE__);
2635 yaffs_ReleaseTempBuffer(dev,buffer,__LINE__);
2638 // Do any required cleanups
2639 for(i = 0; i < cleanups; i++)
2641 // Time to delete the file too
2642 object = yaffs_FindObjectByNumber(dev,dev->gcCleanupList[i]);
2645 yaffs_FreeTnode(dev,object->variant.fileVariant.top);
2646 object->variant.fileVariant.top = NULL;
2647 T(YAFFS_TRACE_GC,(TSTR("yaffs: About to finally delete object %d" TENDSTR),object->objectId));
2648 yaffs_DoGenericObjectDeletion(object);
2655 if(chunksBefore >= (chunksAfter = yaffs_GetErasedChunks(dev)))
2657 T(YAFFS_TRACE_GC,(TSTR("gc did not increase free chunks before %d after %d" TENDSTR),chunksBefore,chunksAfter));
2664 static yaffs_Object *yaffs_FindDeletedUnlinkedFile(yaffs_Device *dev)
2666 // find a file to delete
2667 struct list_head *i;
2671 //Scan the unlinked files looking for one to delete
2672 list_for_each(i,&dev->unlinkedDir->variant.directoryVariant.children)
2676 l = list_entry(i, yaffs_Object,siblings);
2687 static void yaffs_DoUnlinkedFileDeletion(yaffs_Device *dev)
2689 // This does background deletion on unlinked files.. only deleted ones.
2690 // If we don't have a file we're working on then find one
2691 if(!dev->unlinkedDeletion && dev->nDeletedFiles > 0)
2693 dev->unlinkedDeletion = yaffs_FindDeletedUnlinkedFile(dev);
2696 // OK, we're working on a file...
2697 if(dev->unlinkedDeletion)
2699 yaffs_Object *obj = dev->unlinkedDeletion;
2701 int limit; // Number of chunks to delete in a file.
2702 // NB this can be exceeded, but not by much.
2706 delresult = yaffs_DeleteWorker(obj, obj->variant.fileVariant.top, obj->variant.fileVariant.topLevel, 0,&limit);
2708 if(obj->nDataChunks == 0)
2710 // Done all the deleting of data chunks.
2711 // Now dump the header and clean up
2712 yaffs_FreeTnode(dev,obj->variant.fileVariant.top);
2713 obj->variant.fileVariant.top = NULL;
2714 yaffs_DoGenericObjectDeletion(obj);
2715 dev->nDeletedFiles--;
2716 dev->nUnlinkedFiles--;
2717 dev->nBackgroundDeletions++;
2718 dev->unlinkedDeletion = NULL;
2727 // New garbage collector
2728 // If we're very low on erased blocks then we do aggressive garbage collection
2729 // otherwise we do "leasurely" garbage collection.
2730 // Aggressive gc looks further (whole array) and will accept dirtier blocks.
2731 // Passive gc only inspects smaller areas and will only accept cleaner blocks.
2733 // The idea is to help clear out space in a more spread-out manner.
2734 // Dunno if it really does anything useful.
2736 int yaffs_CheckGarbageCollection(yaffs_Device *dev)
2740 int gcOk = YAFFS_OK;
2743 //yaffs_DoUnlinkedFileDeletion(dev);
2745 // This loop should pass the first time.
2746 // We'll only see looping here if the erase of the collected block fails.
2750 if(dev->nErasedBlocks <= (dev->nReservedBlocks + 2))
2752 // We need a block soon...
2757 // We're in no hurry
2761 block = yaffs_FindBlockForGarbageCollection(dev,aggressive);
2765 dev->garbageCollections++;
2768 dev->passiveGarbageCollections++;
2771 T(YAFFS_TRACE_GC,(TSTR("yaffs: GC erasedBlocks %d aggressive %d" TENDSTR),dev->nErasedBlocks,aggressive));
2773 gcOk = yaffs_GarbageCollectBlock(dev,block);
2776 if(dev->nErasedBlocks <= (dev->nReservedBlocks + 1))
2778 T(YAFFS_TRACE_GC,(TSTR("yaffs: GC !!!no reclaim!!! erasedBlocks %d after try %d block %d" TENDSTR),dev->nErasedBlocks,maxTries,block));
2780 } while((dev->nErasedBlocks <= (dev->nReservedBlocks + 1)) && (block > 0) && (maxTries < 5));
2782 return aggressive ? gcOk: YAFFS_OK;
2786 //////////////////////////// TAGS ///////////////////////////////////////
2792 void yaffs_CalcTagsECC(yaffs_Tags *tags)
2796 unsigned char *b = ((yaffs_TagsUnion *)tags)->asBytes;
2803 for(i = 0; i < 8; i++)
2805 for(j = 1; j &0xff; j<<=1)
2820 int yaffs_CheckECCOnTags(yaffs_Tags *tags)
2822 unsigned ecc = tags->ecc;
2824 yaffs_CalcTagsECC(tags);
2828 if(ecc && ecc <= 64)
2830 // TODO: Handle the failure better. Retire?
2831 unsigned char *b = ((yaffs_TagsUnion *)tags)->asBytes;
2835 b[ecc / 8] ^= (1 << (ecc & 7));
2837 // Now recvalc the ecc
2838 yaffs_CalcTagsECC(tags);
2840 return 1; // recovered error
2844 // Wierd ecc failure value
2845 // TODO Need to do somethiong here
2846 return -1; //unrecovered error
2852 static void yaffs_LoadTagsIntoSpare(yaffs_Spare *sparePtr, yaffs_Tags *tagsPtr)
2854 yaffs_TagsUnion *tu = (yaffs_TagsUnion *)tagsPtr;
2856 yaffs_CalcTagsECC(tagsPtr);
2858 sparePtr->tagByte0 = tu->asBytes[0];
2859 sparePtr->tagByte1 = tu->asBytes[1];
2860 sparePtr->tagByte2 = tu->asBytes[2];
2861 sparePtr->tagByte3 = tu->asBytes[3];
2862 sparePtr->tagByte4 = tu->asBytes[4];
2863 sparePtr->tagByte5 = tu->asBytes[5];
2864 sparePtr->tagByte6 = tu->asBytes[6];
2865 sparePtr->tagByte7 = tu->asBytes[7];
2868 static void yaffs_GetTagsFromSpare(yaffs_Device *dev, yaffs_Spare *sparePtr,yaffs_Tags *tagsPtr)
2870 yaffs_TagsUnion *tu = (yaffs_TagsUnion *)tagsPtr;
2873 tu->asBytes[0]= sparePtr->tagByte0;
2874 tu->asBytes[1]= sparePtr->tagByte1;
2875 tu->asBytes[2]= sparePtr->tagByte2;
2876 tu->asBytes[3]= sparePtr->tagByte3;
2877 tu->asBytes[4]= sparePtr->tagByte4;
2878 tu->asBytes[5]= sparePtr->tagByte5;
2879 tu->asBytes[6]= sparePtr->tagByte6;
2880 tu->asBytes[7]= sparePtr->tagByte7;
2882 result = yaffs_CheckECCOnTags(tagsPtr);
2885 dev->tagsEccFixed++;
2889 dev->tagsEccUnfixed++;
2893 static void yaffs_SpareInitialise(yaffs_Spare *spare)
2895 memset(spare,0xFF,sizeof(yaffs_Spare));
2901 static int yaffs_WriteNewChunkWithTagsToNAND(yaffs_Device *dev, const __u8 *buffer, yaffs_ExtendedTags *tags, int useReserve)
2903 // NB There must be tags, data is optional
2904 // If there is data, then an ECC is calculated on it.
2913 //yaffs_SpareInitialise(&spare);
2915 //if(!dev->useNANDECC && buffer)
2917 // yaffs_CalcECC(buffer,&spare);
2920 //yaffs_LoadTagsIntoSpare(&spare,tags);
2922 return yaffs_WriteNewChunkToNAND(dev,buffer,&spare,useReserve);
2927 static int yaffs_TagsMatch(const yaffs_ExtendedTags *tags, int objectId, int chunkInObject)
2929 return ( tags->chunkId == chunkInObject &&
2930 tags->objectId == objectId &&
2931 !tags->chunkDeleted) ? 1 : 0;
2935 /////////////////////////////////////////////////////////////////////////////////////////////////////////
2938 int yaffs_FindChunkInFile(yaffs_Object *in,int chunkInInode,yaffs_ExtendedTags *tags)
2940 //Get the Tnode, then get the level 0 offset chunk offset
2943 yaffs_ExtendedTags localTags;
2946 yaffs_Device *dev = in->myDev;
2951 // Passed a NULL, so use our own tags space
2955 tn = yaffs_FindLevel0Tnode(dev,&in->variant.fileVariant, chunkInInode);
2959 theChunk = tn->level0[chunkInInode & YAFFS_TNODES_LEVEL0_MASK] << dev->chunkGroupBits;
2961 retVal = yaffs_FindChunkInGroup(dev,theChunk,tags,in->objectId,chunkInInode);
2966 int yaffs_FindAndDeleteChunkInFile(yaffs_Object *in,int chunkInInode,yaffs_ExtendedTags *tags)
2968 //Get the Tnode, then get the level 0 offset chunk offset
2971 yaffs_ExtendedTags localTags;
2973 yaffs_Device *dev = in->myDev;
2978 // Passed a NULL, so use our own tags space
2982 tn = yaffs_FindLevel0Tnode(dev,&in->variant.fileVariant, chunkInInode);
2987 theChunk = tn->level0[chunkInInode & YAFFS_TNODES_LEVEL0_MASK] << dev->chunkGroupBits;
2989 retVal = yaffs_FindChunkInGroup(dev,theChunk,tags,in->objectId,chunkInInode);
2991 // Delete the entry in the filestructure (if found)
2994 tn->level0[chunkInInode & YAFFS_TNODES_LEVEL0_MASK] = 0;
2999 //T(("No level 0 found for %d\n", chunkInInode));
3004 //T(("Could not find %d to delete\n",chunkInInode));
3010 #ifdef YAFFS_PARANOID
3012 static int yaffs_CheckFileSanity(yaffs_Object *in)
3020 yaffs_Tags localTags;
3021 yaffs_Tags *tags = &localTags;
3026 if(in->variantType != YAFFS_OBJECT_TYPE_FILE)
3028 //T(("Object not a file\n"));
3032 objId = in->objectId;
3033 fSize = in->variant.fileVariant.fileSize;
3034 nChunks = (fSize + in->myDev->nBytesPerChunk -1)/in->myDev->nBytesPerChunk;
3036 for(chunk = 1; chunk <= nChunks; chunk++)
3038 tn = yaffs_FindLevel0Tnode(in->myDev,&in->variant.fileVariant, chunk);
3043 theChunk = tn->level0[chunk & YAFFS_TNODES_LEVEL0_MASK] << in->myDev->chunkGroupBits;
3045 if(yaffs_CheckChunkBits(dev,theChunk/dev->nChunksPerBlock,theChunk%dev->nChunksPerBlock))
3049 yaffs_ReadChunkTagsFromNAND(in->myDev,theChunk,tags,&chunkDeleted);
3050 if(yaffs_TagsMatch(tags,in->objectId,chunk,chunkDeleted))
3058 //T(("File problem file [%d,%d] NAND %d tags[%d,%d]\n",
3059 // objId,chunk,theChunk,tags->chunkId,tags->objectId);
3068 //T(("No level 0 found for %d\n", chunk));
3072 return failed ? YAFFS_FAIL : YAFFS_OK;
3077 static int yaffs_PutChunkIntoFile(yaffs_Object *in,int chunkInInode, int chunkInNAND, int inScan)
3079 // NB inScan is zero unless scanning. For forward scanning, inScan is > 0; for backward scanning inScan is < 0
3081 yaffs_Device *dev = in->myDev;
3083 yaffs_ExtendedTags existingTags;
3084 yaffs_ExtendedTags newTags;
3085 unsigned existingSerial, newSerial;
3087 if(in->variantType != YAFFS_OBJECT_TYPE_FILE)
3089 // Just ignore an attempt at putting a chunk into a non-file during scanning
3090 // If it is not during Scanning then something went wrong!
3093 T(YAFFS_TRACE_ERROR, (TSTR("yaffs tragedy:attempt to put data chunk into a non-file" TENDSTR)));
3097 yaffs_DeleteChunk(dev,chunkInNAND,1,__LINE__);
3101 tn = yaffs_AddOrFindLevel0Tnode(dev,&in->variant.fileVariant, chunkInInode);
3107 existingChunk = tn->level0[chunkInInode & YAFFS_TNODES_LEVEL0_MASK];
3111 // If we're scanning then we need to test for duplicates
3112 // NB This does not need to be efficient since it should only ever
3113 // happen when the power fails during a write, then only one
3114 // chunk should ever be affected.
3116 // Correction for YAFFS2: This could happen quite a lot and we need to think about efficiency! TODO
3117 // Update: For backward scanning we don't need to re-read tags so this is quite cheap.
3121 if(existingChunk != 0)
3123 // NB Right now existing chunk will not be real chunkId if the device >= 32MB
3124 // thus we have to do a FindChunkInFile to get the real chunk id.
3126 // We have a duplicate now we need to decide which one to use:
3128 // Backwards scanning YAFFS2: The old one is what we use, dump the new one.
3129 // Forward scanning YAFFS2: The new one is what we use, dump the old one.
3130 // YAFFS1: Get both sets of tags and compare serial numbers.
3136 // Only do this for forward scanning
3137 yaffs_ReadChunkWithTagsFromNAND(dev,chunkInNAND, NULL,&newTags);
3141 existingChunk = yaffs_FindChunkInFile(in,chunkInInode, &existingTags);
3144 if(existingChunk <=0)
3146 //Hoosterman - how did this happen?
3148 T(YAFFS_TRACE_ERROR, (TSTR("yaffs tragedy: existing chunk < 0 in scan" TENDSTR)));
3153 // NB The deleted flags should be false, otherwise the chunks will
3154 // not be loaded during a scan
3156 newSerial = newTags.serialNumber;
3157 existingSerial = existingTags.serialNumber;
3160 ( in->myDev->isYaffs2 ||
3161 existingChunk <= 0 ||
3162 ((existingSerial+1) & 3) == newSerial))
3164 // Forward scanning.
3166 // Delete the old one and drop through to update the tnode
3167 yaffs_DeleteChunk(dev,existingChunk,1,__LINE__);
3171 // Backward scanning or we want to use the existing one
3173 // Delete the new one and return early so that the tnode isn't changed
3174 yaffs_DeleteChunk(dev,chunkInNAND,1,__LINE__);
3181 if(existingChunk == 0)
3186 tn->level0[chunkInInode & YAFFS_TNODES_LEVEL0_MASK] = (chunkInNAND >> dev->chunkGroupBits);
3193 int yaffs_ReadChunkDataFromObject(yaffs_Object *in,int chunkInInode, __u8 *buffer)
3195 int chunkInNAND = yaffs_FindChunkInFile(in,chunkInInode,NULL);
3197 if(chunkInNAND >= 0)
3199 return yaffs_ReadChunkWithTagsFromNAND(in->myDev,chunkInNAND,buffer,NULL);
3203 T(YAFFS_TRACE_NANDACCESS,(TSTR("Chunk %d not found zero instead" TENDSTR),chunkInNAND));
3205 memset(buffer,0,in->myDev->nBytesPerChunk); // get sane data if you read a hole
3212 void yaffs_DeleteChunk(yaffs_Device *dev,int chunkId,int markNAND,int lyn)
3216 yaffs_ExtendedTags tags;
3217 yaffs_BlockInfo *bi;
3219 if(chunkId <= 0) return;
3222 block = chunkId / dev->nChunksPerBlock;
3223 page = chunkId % dev->nChunksPerBlock;
3225 bi = yaffs_GetBlockInfo(dev,block);
3227 T(YAFFS_TRACE_DELETION,(TSTR("line %d delete of chunk %d" TENDSTR),lyn,chunkId));
3230 bi->blockState != YAFFS_BLOCK_STATE_COLLECTING &&
3233 // yaffs_SpareInitialise(&spare);
3235 #ifdef CONFIG_MTD_NAND_VERIFY_WRITE
3237 //read data before write, to ensure correct ecc
3238 //if we're using MTD verification under Linux
3239 yaffs_ReadChunkFromNAND(dev,chunkId,NULL,&spare,0);
3242 yaffs_InitialiseTags(&tags);
3244 tags.chunkDeleted = 1;
3247 yaffs_WriteChunkWithTagsToNAND(dev,chunkId,NULL,&tags);
3248 yaffs_HandleUpdateChunk(dev,chunkId,&tags);
3252 dev->nUnmarkedDeletions++;
3256 // Pull out of the management area.
3257 // If the whole block became dirty, this will kick off an erasure.
3258 if( bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING ||
3259 bi->blockState == YAFFS_BLOCK_STATE_FULL ||
3260 bi->blockState == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
3261 bi->blockState == YAFFS_BLOCK_STATE_COLLECTING)
3265 yaffs_ClearChunkBit(dev,block,page);
3268 if(bi->pagesInUse == 0 &&
3269 !bi->hasShrinkHeader &&
3270 bi->blockState != YAFFS_BLOCK_STATE_ALLOCATING &&
3271 bi->blockState != YAFFS_BLOCK_STATE_NEEDS_SCANNING)
3273 yaffs_BlockBecameDirty(dev,block);
3279 // T(("Bad news deleting chunk %d\n",chunkId));
3287 int yaffs_WriteChunkDataToObject(yaffs_Object *in,int chunkInInode, const __u8 *buffer,int nBytes,int useReserve)
3289 // Find old chunk Need to do this to get serial number
3290 // Write new one and patch into tree.
3291 // Invalidate old tags.
3294 yaffs_ExtendedTags prevTags;
3297 yaffs_ExtendedTags newTags;
3299 yaffs_Device *dev = in->myDev;
3301 yaffs_CheckGarbageCollection(dev);
3303 // Get the previous chunk at this location in the file if it exists
3304 prevChunkId = yaffs_FindChunkInFile(in,chunkInInode,&prevTags);
3307 yaffs_InitialiseTags(&newTags);
3309 newTags.chunkId = chunkInInode;
3310 newTags.objectId = in->objectId;
3311 newTags.serialNumber = (prevChunkId >= 0) ? prevTags.serialNumber + 1 : 1;
3312 newTags.byteCount = nBytes;
3314 // yaffs_CalcTagsECC(&newTags);
3316 newChunkId = yaffs_WriteNewChunkWithTagsToNAND(dev,buffer,&newTags,useReserve);
3320 yaffs_PutChunkIntoFile(in,chunkInInode,newChunkId,0);
3323 if(prevChunkId >= 0)
3325 yaffs_DeleteChunk(dev,prevChunkId,1,__LINE__);
3329 yaffs_CheckFileSanity(in);
3340 // UpdateObjectHeader updates the header on NAND for an object.
3341 // If name is not NULL, then that new name is used.
3343 int yaffs_UpdateObjectHeader(yaffs_Object *in,const YCHAR *name, int force,int isShrink)
3346 yaffs_BlockInfo *bi;
3348 yaffs_Device *dev = in->myDev;
3354 yaffs_ExtendedTags newTags;
3356 __u8 *buffer = NULL;
3357 YCHAR oldName[YAFFS_MAX_NAME_LENGTH+1];
3359 // __u8 bufferOld[YAFFS_BYTES_PER_CHUNK];
3361 yaffs_ObjectHeader *oh = NULL;
3362 // yaffs_ObjectHeader *ohOld = (yaffs_ObjectHeader *)bufferOld;
3365 if(!in->fake || force)
3368 yaffs_CheckGarbageCollection(dev);
3370 buffer = yaffs_GetTempBuffer(in->myDev,__LINE__);
3371 oh = (yaffs_ObjectHeader *)buffer;
3373 prevChunkId = in->chunkId;
3375 if(prevChunkId >= 0)
3377 yaffs_ReadChunkWithTagsFromNAND(dev,prevChunkId,buffer,NULL);
3378 memcpy(oldName,oh->name,sizeof(oh->name));
3381 memset(buffer,0xFF,dev->nBytesPerChunk);
3384 oh->type = in->variantType;
3386 oh->st_mode = in->st_mode;
3388 #ifdef CONFIG_YAFFS_WINCE
3389 oh->win_atime[0] = in->win_atime[0];
3390 oh->win_ctime[0] = in->win_ctime[0];
3391 oh->win_mtime[0] = in->win_mtime[0];
3392 oh->win_atime[1] = in->win_atime[1];
3393 oh->win_ctime[1] = in->win_ctime[1];
3394 oh->win_mtime[1] = in->win_mtime[1];
3396 oh->st_uid = in->st_uid;
3397 oh->st_gid = in->st_gid;
3398 oh->st_atime = in->st_atime;
3399 oh->st_mtime = in->st_mtime;
3400 oh->st_ctime = in->st_ctime;
3401 oh->st_rdev = in->st_rdev;
3405 oh->parentObjectId = in->parent->objectId;
3409 oh->parentObjectId = 0;
3412 //oh->sum = in->sum;
3415 memset(oh->name,0,sizeof(oh->name));
3416 yaffs_strncpy(oh->name,name,YAFFS_MAX_NAME_LENGTH);
3418 else if(prevChunkId)
3420 memcpy(oh->name, oldName,sizeof(oh->name));
3424 memset(oh->name,0,sizeof(oh->name));
3427 oh->isShrink = isShrink;
3429 switch(in->variantType)
3431 case YAFFS_OBJECT_TYPE_UNKNOWN:
3432 // Should not happen
3434 case YAFFS_OBJECT_TYPE_FILE:
3435 oh->fileSize = (oh->parentObjectId == YAFFS_OBJECTID_DELETED ||
3436 oh->parentObjectId == YAFFS_OBJECTID_UNLINKED) ? 0 : in->variant.fileVariant.fileSize;
3438 case YAFFS_OBJECT_TYPE_HARDLINK:
3439 oh->equivalentObjectId = in->variant.hardLinkVariant.equivalentObjectId;
3441 case YAFFS_OBJECT_TYPE_SPECIAL:
3444 case YAFFS_OBJECT_TYPE_DIRECTORY:
3447 case YAFFS_OBJECT_TYPE_SYMLINK:
3448 yaffs_strncpy(oh->alias,in->variant.symLinkVariant.alias,YAFFS_MAX_ALIAS_LENGTH);
3449 oh->alias[YAFFS_MAX_ALIAS_LENGTH] = 0;
3454 yaffs_InitialiseTags(&newTags);
3456 newTags.chunkId = 0;
3457 newTags.objectId = in->objectId;
3458 newTags.serialNumber = in->serial;
3460 // Add extra info for file header
3462 newTags.extraHeaderInfoAvailable = 1;
3463 newTags.extraParentObjectId = oh->parentObjectId;
3464 newTags.extraFileLength = oh->fileSize;
3465 newTags.extraIsShrinkHeader = oh->isShrink;
3466 newTags.extraEquivalentObjectId = oh->equivalentObjectId;
3467 newTags.extraObjectType = in->variantType;
3469 // Create new chunk in NAND
3470 newChunkId = yaffs_WriteNewChunkWithTagsToNAND(dev,buffer,&newTags, (prevChunkId >= 0) ? 1 : 0 );
3475 in->chunkId = newChunkId;
3477 if(prevChunkId >= 0)
3479 yaffs_DeleteChunk(dev,prevChunkId,1,__LINE__);
3484 // If this was a shrink, then mark the block that the chunk lives on
3487 bi = yaffs_GetBlockInfo(in->myDev,newChunkId / in->myDev->nChunksPerBlock);
3488 bi->hasShrinkHeader = 1;
3493 retVal = newChunkId;
3498 yaffs_ReleaseTempBuffer(dev,buffer,__LINE__);
3504 /////////////////////// Short Operations Cache ////////////////////////////////
3505 // In many siturations where there is no high level buffering (eg WinCE) a lot of
3506 // reads might be short sequential reads, and a lot of writes may be short
3507 // sequential writes. eg. scanning/writing a jpeg file.
3508 // In these cases, a short read/write cache can provide a huge perfomance benefit
3509 // with dumb-as-a-rock code.
3510 // There are a limited number (~10) of cache chunks per device so that we don't
3511 // need a very intelligent search.
3517 static void yaffs_FlushFilesChunkCache(yaffs_Object *obj)
3519 yaffs_Device *dev = obj->myDev;
3522 yaffs_ChunkCache *cache;
3523 int chunkWritten = 0;
3525 int nCaches = obj->myDev->nShortOpCaches;
3532 // Find the dirty cache for this object with the lowest chunk id.
3533 for(i = 0; i < nCaches; i++)
3535 if(dev->srCache[i].object == obj &&
3536 dev->srCache[i].dirty)
3538 if(!cache || dev->srCache[i].chunkId < lowest)
3540 cache = &dev->srCache[i];
3541 lowest = cache->chunkId;
3546 if(cache && !cache->locked)
3548 //Write it out and free it up
3551 nBytes = cache->object->variant.fileVariant.fileSize - ((cache->chunkId -1) * YAFFS_BYTES_PER_CHUNK);
3553 if(nBytes > YAFFS_BYTES_PER_CHUNK)
3555 nBytes= YAFFS_BYTES_PER_CHUNK;
3558 chunkWritten = yaffs_WriteChunkDataToObject(cache->object,
3564 cache->object = NULL;
3567 } while(cache && chunkWritten > 0);
3571 //Hoosterman, disk full while writing cache out.
3572 T(YAFFS_TRACE_ERROR, (TSTR("yaffs tragedy: no space during cache write" TENDSTR)));
3580 // Grab us a chunk for use.
3581 // First look for an empty one.
3582 // Then look for the least recently used non-dirty one.
3583 // Then look for the least recently used dirty one...., flush and look again.
3584 static yaffs_ChunkCache *yaffs_GrabChunkCacheWorker(yaffs_Device *dev)
3590 if(dev->nShortOpCaches > 0)
3592 for(i = 0; i < dev->nShortOpCaches; i++)
3594 if(!dev->srCache[i].object)
3596 //T(("Grabbing empty %d\n",i));
3598 //printf("Grabbing empty %d\n",i);
3600 return &dev->srCache[i];
3607 usage = 0; // just to stop the compiler grizzling
3609 for(i = 0; i < dev->nShortOpCaches; i++)
3611 if(!dev->srCache[i].dirty &&
3612 ((dev->srCache[i].lastUse < usage && theOne >= 0)||
3615 usage = dev->srCache[i].lastUse;
3620 //T(("Grabbing non-empty %d\n",theOne));
3622 //if(theOne >= 0) printf("Grabbed non-empty cache %d\n",theOne);
3624 return theOne >= 0 ? &dev->srCache[theOne] : NULL;
3634 static yaffs_ChunkCache *yaffs_GrabChunkCache(yaffs_Device *dev)
3636 yaffs_ChunkCache *cache;
3637 yaffs_Object *theObj;
3642 if(dev->nShortOpCaches > 0)
3644 // Try find a non-dirty one...
3646 cache = yaffs_GrabChunkCacheWorker(dev);
3650 // They were all dirty, find the last recently used object and flush
3651 // its cache, then find again.
3652 // NB what's here is not very accurate, we actually flush the object
3653 // the last recently used page.
3655 // With locking we can't assume we can use entry zero
3663 for(i = 0; i < dev->nShortOpCaches; i++)
3665 if( dev->srCache[i].object &&
3666 !dev->srCache[i].locked &&
3667 (dev->srCache[i].lastUse < usage || !cache))
3669 usage = dev->srCache[i].lastUse;
3670 theObj = dev->srCache[i].object;
3671 cache = &dev->srCache[i];
3676 if(!cache || cache->dirty)
3680 yaffs_FlushFilesChunkCache(theObj);
3683 cache = yaffs_GrabChunkCacheWorker(dev);
3687 //printf(" pushout %d\n",pushout);
3699 // Find a cached chunk
3700 static yaffs_ChunkCache *yaffs_FindChunkCache(const yaffs_Object *obj, int chunkId)
3702 yaffs_Device *dev = obj->myDev;
3704 if(dev->nShortOpCaches > 0)
3706 for(i = 0; i < dev->nShortOpCaches; i++)
3708 if(dev->srCache[i].object == obj &&
3709 dev->srCache[i].chunkId == chunkId)
3713 return &dev->srCache[i];
3720 // Mark the chunk for the least recently used algorithym
3721 static void yaffs_UseChunkCache(yaffs_Device *dev, yaffs_ChunkCache *cache, int isAWrite)
3724 if(dev->nShortOpCaches > 0)
3726 if( dev->srLastUse < 0 ||
3727 dev->srLastUse > 100000000)
3729 // Reset the cache usages
3731 for(i = 1; i < dev->nShortOpCaches; i++)
3733 dev->srCache[i].lastUse = 0;
3740 cache->lastUse = dev->srLastUse;
3749 // Invalidate a single cache page.
3750 // Do this when a whole page gets written,
3751 // ie the short cache for this page is no longer valid.
3752 static void yaffs_InvalidateChunkCache(yaffs_Object *object, int chunkId)
3754 if(object->myDev->nShortOpCaches > 0)
3756 yaffs_ChunkCache *cache = yaffs_FindChunkCache(object,chunkId);
3760 cache->object = NULL;
3766 // Invalidate all the cache pages associated with this object
3767 // Do this whenever ther file is deleted or resized.
3768 static void yaffs_InvalidateWholeChunkCache(yaffs_Object *in)
3771 yaffs_Device *dev = in->myDev;
3773 if(dev->nShortOpCaches > 0)
3775 // Now invalidate it.
3776 for(i = 0; i < dev->nShortOpCaches; i++)
3778 if(dev->srCache[i].object == in)
3780 dev->srCache[i].object = NULL;
3790 ///////////////////////// File read/write ///////////////////////////////
3791 // Read and write have very similar structures.
3792 // In general the read/write has three parts to it
3793 // * An incomplete chunk to start with (if the read/write is not chunk-aligned)
3794 // * Some complete chunks
3795 // * An incomplete chunk to end off with
3797 // Curve-balls: the first chunk might also be the last chunk.
3799 int yaffs_ReadDataFromFile(yaffs_Object *in, __u8 * buffer, __u32 offset, int nBytes)
3808 yaffs_ChunkCache *cache;
3816 chunk = offset / dev->nBytesPerChunk + 1; // The first chunk is 1
3817 start = offset % dev->nBytesPerChunk;
3819 // OK now check for the curveball where the start and end are in
3821 if( (start + n) < dev->nBytesPerChunk)
3827 nToCopy = dev->nBytesPerChunk - start;
3830 cache = yaffs_FindChunkCache(in,chunk);
3832 // If the chunk is already in the cache or it is less than a whole chunk
3833 // then use the cache (if there is caching)
3834 // else bypass the cache.
3835 if( cache || nToCopy != dev->nBytesPerChunk)
3837 if(dev->nShortOpCaches > 0)
3840 // If we can't find the data in the cache, then load it up.
3844 cache = yaffs_GrabChunkCache(in->myDev);
3846 cache->chunkId = chunk;
3849 yaffs_ReadChunkDataFromObject(in,chunk,cache->data);
3853 yaffs_UseChunkCache(dev,cache,0);
3857 #ifdef CONFIG_YAFFS_WINCE
3858 yfsd_UnlockYAFFS(TRUE);
3860 memcpy(buffer,&cache->data[start],nToCopy);
3862 #ifdef CONFIG_YAFFS_WINCE
3863 yfsd_LockYAFFS(TRUE);
3869 // Read into the local buffer then copy...
3871 __u8 *localBuffer = yaffs_GetTempBuffer(dev,__LINE__);
3872 yaffs_ReadChunkDataFromObject(in,chunk,localBuffer);
3873 #ifdef CONFIG_YAFFS_WINCE
3874 yfsd_UnlockYAFFS(TRUE);
3876 memcpy(buffer,&localBuffer[start],nToCopy);
3878 #ifdef CONFIG_YAFFS_WINCE
3879 yfsd_LockYAFFS(TRUE);
3881 yaffs_ReleaseTempBuffer(dev,localBuffer,__LINE__);
3887 #ifdef CONFIG_YAFFS_WINCE
3888 __u8 *localBuffer = yaffs_GetTempBuffer(dev,__LINE__);
3890 // Under WinCE can't do direct transfer. Need to use a local buffer.
3891 // This is because we otherwise screw up WinCE's memory mapper
3892 yaffs_ReadChunkDataFromObject(in,chunk,localBuffer);
3894 #ifdef CONFIG_YAFFS_WINCE
3895 yfsd_UnlockYAFFS(TRUE);
3897 memcpy(buffer,localBuffer,dev->nBytesPerChunk);
3899 #ifdef CONFIG_YAFFS_WINCE
3900 yfsd_LockYAFFS(TRUE);
3901 yaffs_ReleaseTempBuffer(dev,localBuffer,__LINE__);
3905 // A full chunk. Read directly into the supplied buffer.
3906 yaffs_ReadChunkDataFromObject(in,chunk,buffer);
3922 int yaffs_WriteDataToFile(yaffs_Object *in,const __u8 * buffer, __u32 offset, int nBytes, int writeThrough)
3931 int startOfWrite = offset;
3932 int chunkWritten = 0;
3940 while(n > 0 && chunkWritten >= 0)
3942 chunk = offset / dev->nBytesPerChunk + 1;
3943 start = offset % dev->nBytesPerChunk;
3946 // OK now check for the curveball where the start and end are in
3949 if((start + n) < dev->nBytesPerChunk)
3953 // Now folks, to calculate how many bytes to write back....
3954 // If we're overwriting and not writing to then end of file then
3955 // we need to write back as much as was there before.
3957 nBytesRead = in->variant.fileVariant.fileSize - ((chunk -1) * dev->nBytesPerChunk);
3959 if(nBytesRead > dev->nBytesPerChunk)
3961 nBytesRead = dev->nBytesPerChunk;
3964 nToWriteBack = (nBytesRead > (start + n)) ? nBytesRead : (start +n);
3969 nToCopy = dev->nBytesPerChunk - start;
3970 nToWriteBack = dev->nBytesPerChunk;
3973 if(nToCopy != dev->nBytesPerChunk)
3975 // An incomplete start or end chunk (or maybe both start and end chunk)
3976 if(dev->nShortOpCaches > 0)
3978 yaffs_ChunkCache *cache;
3979 // If we can't find the data in the cache, then load it up.
3980 cache = yaffs_FindChunkCache(in,chunk);
3981 if(!cache && yaffs_CheckSpaceForChunkCache(in->myDev))
3983 cache = yaffs_GrabChunkCache(in->myDev);
3985 cache->chunkId = chunk;
3988 yaffs_ReadChunkDataFromObject(in,chunk,cache->data);
3993 yaffs_UseChunkCache(dev,cache,1);
3995 #ifdef CONFIG_YAFFS_WINCE
3996 yfsd_UnlockYAFFS(TRUE);
3999 memcpy(&cache->data[start],buffer,nToCopy);
4001 #ifdef CONFIG_YAFFS_WINCE
4002 yfsd_LockYAFFS(TRUE);
4005 cache->nBytes = nToWriteBack;
4009 chunkWritten = yaffs_WriteChunkDataToObject(cache->object,
4019 chunkWritten = -1; // fail the write
4024 // An incomplete start or end chunk (or maybe both start and end chunk)
4025 // Read into the local buffer then copy, then copy over and write back.
4027 __u8 *localBuffer = yaffs_GetTempBuffer(dev,__LINE__);
4029 yaffs_ReadChunkDataFromObject(in,chunk,localBuffer);
4031 #ifdef CONFIG_YAFFS_WINCE
4032 yfsd_UnlockYAFFS(TRUE);
4035 memcpy(&localBuffer[start],buffer,nToCopy);
4037 #ifdef CONFIG_YAFFS_WINCE
4038 yfsd_LockYAFFS(TRUE);
4040 chunkWritten = yaffs_WriteChunkDataToObject(in,chunk,localBuffer,nToWriteBack,0);
4042 yaffs_ReleaseTempBuffer(dev,localBuffer,__LINE__);
4044 //T(("Write with readback to chunk %d %d start %d copied %d wrote back %d\n",chunk,chunkWritten,start, nToCopy, nToWriteBack));
4051 #ifdef CONFIG_YAFFS_WINCE
4052 // Under WinCE can't do direct transfer. Need to use a local buffer.
4053 // This is because we otherwise screw up WinCE's memory mapper
4054 __u8 *localBuffer = yaffs_GetTempBuffer(dev,__LINE__);
4055 #ifdef CONFIG_YAFFS_WINCE
4056 yfsd_UnlockYAFFS(TRUE);
4058 memcpy(localBuffer,buffer,dev->nBytesPerChunk);
4059 #ifdef CONFIG_YAFFS_WINCE
4060 yfsd_LockYAFFS(TRUE);
4062 chunkWritten = yaffs_WriteChunkDataToObject(in,chunk,localBuffer,dev->nBytesPerChunk,0);
4063 yaffs_ReleaseTempBuffer(dev,localBuffer,__LINE__);
4065 // A full chunk. Write directly from the supplied buffer.
4066 chunkWritten = yaffs_WriteChunkDataToObject(in,chunk,buffer,dev->nBytesPerChunk,0);
4068 // Since we've overwritten the cached data, we better invalidate it.
4069 yaffs_InvalidateChunkCache(in,chunk);
4070 //T(("Write to chunk %d %d\n",chunk,chunkWritten));
4073 if(chunkWritten >= 0)
4083 // Update file object
4085 if((startOfWrite + nDone) > in->variant.fileVariant.fileSize)
4087 in->variant.fileVariant.fileSize = (startOfWrite + nDone);
4095 static void yaffs_PruneResizedChunks(yaffs_Object *in, int newSize)
4098 yaffs_Device *dev = in->myDev;
4099 int oldFileSize = in->variant.fileVariant.fileSize;
4102 int lastDel = 1 + (oldFileSize-1)/dev->nBytesPerChunk;
4104 int startDel = 1 + (newSize + dev->nBytesPerChunk - 1)/
4105 dev->nBytesPerChunk;
4109 // Delete backwards so that we don't end up with holes if
4110 // power is lost part-way through the operation.
4111 for(i = lastDel; i >= startDel; i--)
4113 // NB this could be optimised somewhat,
4114 // eg. could retrieve the tags and write them without
4115 // using yaffs_DeleteChunk
4117 chunkId = yaffs_FindAndDeleteChunkInFile(in,i,NULL);
4120 if(chunkId < (dev->startBlock * dev->nChunksPerBlock) ||
4121 chunkId >= ((dev->endBlock+1) * dev->nChunksPerBlock))
4123 T(YAFFS_TRACE_ALWAYS,(TSTR("Found daft chunkId %d for %d"TENDSTR),chunkId,i));
4128 yaffs_DeleteChunk(dev,chunkId,1,__LINE__);
4135 int yaffs_ResizeFile(yaffs_Object *in, int newSize)
4138 int oldFileSize = in->variant.fileVariant.fileSize;
4139 int sizeOfPartialChunk;
4140 yaffs_Device *dev = in->myDev;
4142 sizeOfPartialChunk = newSize % dev->nBytesPerChunk;
4145 yaffs_FlushFilesChunkCache(in);
4146 yaffs_InvalidateWholeChunkCache(in);
4148 yaffs_CheckGarbageCollection(dev);
4150 if(in->variantType != YAFFS_OBJECT_TYPE_FILE)
4152 return yaffs_GetFileSize(in);
4155 if(newSize < oldFileSize)
4158 yaffs_PruneResizedChunks(in,newSize);
4160 if(sizeOfPartialChunk != 0)
4162 int lastChunk = 1+ newSize/dev->nBytesPerChunk;
4163 __u8 *localBuffer = yaffs_GetTempBuffer(dev,__LINE__);
4165 // Got to read and rewrite the last chunk with its new size and zero pad
4166 yaffs_ReadChunkDataFromObject(in,lastChunk,localBuffer);
4168 memset(localBuffer + sizeOfPartialChunk,0, dev->nBytesPerChunk - sizeOfPartialChunk);
4170 yaffs_WriteChunkDataToObject(in,lastChunk,localBuffer,sizeOfPartialChunk,1);
4172 yaffs_ReleaseTempBuffer(dev,localBuffer,__LINE__);
4175 in->variant.fileVariant.fileSize = newSize;
4177 yaffs_PruneFileStructure(dev,&in->variant.fileVariant);
4179 // Write a new object header to show we've shrunk the file
4180 // Do this only if the file is not in the deleted directories.
4181 if(in->parent->objectId != YAFFS_OBJECTID_UNLINKED &&
4182 in->parent->objectId != YAFFS_OBJECTID_DELETED
4185 yaffs_UpdateObjectHeader(in,NULL, 0, 1);
4199 loff_t yaffs_GetFileSize(yaffs_Object *obj)
4201 obj = yaffs_GetEquivalentObject(obj);
4203 switch(obj->variantType)
4205 case YAFFS_OBJECT_TYPE_FILE:
4206 return obj->variant.fileVariant.fileSize;
4207 case YAFFS_OBJECT_TYPE_SYMLINK:
4208 return yaffs_strlen(obj->variant.symLinkVariant.alias);
4216 // yaffs_FlushFile() updates the file's
4219 int yaffs_FlushFile(yaffs_Object *in, int updateTime)
4224 //T(("flushing object header\n"));
4226 yaffs_FlushFilesChunkCache(in);
4229 #ifdef CONFIG_YAFFS_WINCE
4230 yfsd_WinFileTimeNow(in->win_mtime);
4233 in->st_mtime = Y_CURRENT_TIME;
4238 retVal = (yaffs_UpdateObjectHeader(in,NULL,0,0) >= 0)? YAFFS_OK : YAFFS_FAIL;
4250 static int yaffs_DoGenericObjectDeletion(yaffs_Object *in)
4253 // First off, invalidate the file's data in the cache, without flushing.
4254 yaffs_InvalidateWholeChunkCache(in);
4256 if(in->myDev->isYaffs2 && (in->parent != in->myDev->deletedDir))
4258 // Move to the unlinked directory so we have a record that it was deleted.
4259 yaffs_ChangeObjectName(in, in->myDev->deletedDir,NULL,0);
4264 yaffs_RemoveObjectFromDirectory(in);
4265 yaffs_DeleteChunk(in->myDev,in->chunkId,1,__LINE__);
4271 in->myInode->u.generic_ip = NULL;
4277 yaffs_FreeObject(in);
4282 // yaffs_DeleteFile deletes the whole file data
4283 // and the inode associated with the file.
4284 // It does not delete the links associated with the file.
4285 static int yaffs_UnlinkFile(yaffs_Object *in)
4288 #ifdef CONFIG_YAFFS_DISABLE_BACKGROUND_DELETION
4290 // Delete the file data & tnodes
4292 yaffs_DeleteWorker(in, in->variant.fileVariant.top, in->variant.fileVariant.topLevel, 0,NULL);
4295 yaffs_FreeTnode(in->myDev,in->variant.fileVariant.top);
4297 return yaffs_DoGenericObjectDeletion(in);
4300 int immediateDeletion=0;
4305 //in->myDev->nUnlinkedFiles++;
4306 //in->renameAllowed = 0;
4310 immediateDeletion = 1;
4316 immediateDeletion = 1;
4320 if(immediateDeletion)
4322 retVal = yaffs_ChangeObjectName(in, in->myDev->deletedDir,NULL,0);
4323 T(YAFFS_TRACE_TRACING,(TSTR("yaffs: immediate deletion of file %d" TENDSTR),in->objectId));
4325 in->myDev->nDeletedFiles++;
4326 if( 0 && in->myDev->isYaffs2)
4328 yaffs_ResizeFile(in,0);
4330 yaffs_SoftDeleteFile(in);
4334 retVal = yaffs_ChangeObjectName(in, in->myDev->unlinkedDir,NULL,0);
4344 int yaffs_DeleteFile(yaffs_Object *in)
4346 int retVal = YAFFS_OK;
4348 if(in->nDataChunks > 0)
4350 // Use soft deletion
4353 retVal = yaffs_UnlinkFile(in);
4355 if(retVal == YAFFS_OK &&
4360 in->myDev->nDeletedFiles++;
4361 yaffs_SoftDeleteFile(in);
4363 return in->deleted ? YAFFS_OK : YAFFS_FAIL;
4367 // The file has no data chunks so we toss it immediately
4368 yaffs_FreeTnode(in->myDev,in->variant.fileVariant.top);
4369 in->variant.fileVariant.top = NULL;
4370 yaffs_DoGenericObjectDeletion(in);
4376 static int yaffs_DeleteDirectory(yaffs_Object *in)
4378 //First check that the directory is empty.
4379 if(list_empty(&in->variant.directoryVariant.children))
4381 return yaffs_DoGenericObjectDeletion(in);
4388 static int yaffs_DeleteSymLink(yaffs_Object *in)
4390 YFREE(in->variant.symLinkVariant.alias);
4392 return yaffs_DoGenericObjectDeletion(in);
4395 static int yaffs_DeleteHardLink(yaffs_Object *in)
4397 // remove this hardlink from the list assocaited with the equivalent
4399 list_del(&in->hardLinks);
4400 return yaffs_DoGenericObjectDeletion(in);
4404 static void yaffs_DestroyObject(yaffs_Object *obj)
4406 switch(obj->variantType)
4408 case YAFFS_OBJECT_TYPE_FILE: yaffs_DeleteFile(obj); break;
4409 case YAFFS_OBJECT_TYPE_DIRECTORY: yaffs_DeleteDirectory(obj); break;
4410 case YAFFS_OBJECT_TYPE_SYMLINK: yaffs_DeleteSymLink(obj); break;
4411 case YAFFS_OBJECT_TYPE_HARDLINK: yaffs_DeleteHardLink(obj); break;
4412 case YAFFS_OBJECT_TYPE_SPECIAL: yaffs_DoGenericObjectDeletion(obj); break;
4413 case YAFFS_OBJECT_TYPE_UNKNOWN: break; // should not happen.
4418 static int yaffs_UnlinkWorker(yaffs_Object *obj)
4422 if(obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK)
4424 return yaffs_DeleteHardLink(obj);
4426 else if(!list_empty(&obj->hardLinks))
4428 // Curve ball: We're unlinking an object that has a hardlink.
4430 // This problem arises because we are not strictly following
4431 // The Linux link/inode model.
4433 // We can't really delete the object.
4434 // Instead, we do the following:
4435 // - Select a hardlink.
4436 // - Unhook it from the hard links
4437 // - Unhook it from its parent directory (so that the rename can work)
4438 // - Rename the object to the hardlink's name.
4439 // - Delete the hardlink
4444 YCHAR name[YAFFS_MAX_NAME_LENGTH+1];
4446 hl = list_entry(obj->hardLinks.next,yaffs_Object,hardLinks);
4448 list_del_init(&hl->hardLinks);
4449 list_del_init(&hl->siblings);
4451 yaffs_GetObjectName(hl,name,YAFFS_MAX_NAME_LENGTH+1);
4453 retVal = yaffs_ChangeObjectName(obj, hl->parent, name,0);
4455 if(retVal == YAFFS_OK)
4457 retVal = yaffs_DoGenericObjectDeletion(hl);
4464 switch(obj->variantType)
4466 case YAFFS_OBJECT_TYPE_FILE:
4467 return yaffs_UnlinkFile(obj);
4469 case YAFFS_OBJECT_TYPE_DIRECTORY:
4470 return yaffs_DeleteDirectory(obj);
4472 case YAFFS_OBJECT_TYPE_SYMLINK:
4473 return yaffs_DeleteSymLink(obj);
4475 case YAFFS_OBJECT_TYPE_SPECIAL:
4476 return yaffs_DoGenericObjectDeletion(obj);
4478 case YAFFS_OBJECT_TYPE_HARDLINK:
4479 case YAFFS_OBJECT_TYPE_UNKNOWN:
4486 int yaffs_Unlink(yaffs_Object *dir, const YCHAR *name)
4490 obj = yaffs_FindObjectByName(dir,name);
4492 if(obj && obj->unlinkAllowed)
4494 return yaffs_UnlinkWorker(obj);
4501 //////////////// Initialisation Scanning /////////////////
4505 // For now we use the SmartMedia check.
4506 // We look at the blockStatus byte in the first two chunks
4507 // These must be 0xFF to pass as OK.
4508 // todo: this function needs to be modifyable foir different NAND types
4509 // and different chunk sizes. Suggest make this into a per-device configurable
4511 static int yaffs_IsBlockBad(yaffs_Device *dev, int blk)
4513 yaffsExtendedTags *tags;
4515 yaffs_ReadChunkFromNAND(dev,blk * dev->nChunksPerBlock,NULL,&tags,1);
4517 if(yaffs_CountBits(spare.blockStatus) < 7)
4522 if(spare.blockStatus != 0xFF)
4527 yaffs_ReadChunkFromNAND(dev,blk * dev->nChunksPerBlock + 1,NULL,&spare,1);
4530 if(yaffs_CountBits(spare.blockStatus) < 7)
4535 if(spare.blockStatus != 0xFF)
4556 static int yaffs_Scan(yaffs_Device *dev)
4558 yaffs_ExtendedTags tags;
4563 int nBlocksToScan = 0;
4568 yaffs_BlockState state;
4569 yaffs_Object *hardList = NULL;
4571 yaffs_BlockInfo *bi;
4573 yaffs_ObjectHeader *oh;
4575 yaffs_Object *parent;
4576 int nBlocks = dev->endBlock - dev->startBlock + 1;
4580 yaffs_BlockIndex *blockIndex = NULL;
4582 T(YAFFS_TRACE_SCAN,(TSTR("yaffs_Scan starts startblk %d endblk %d..." TENDSTR),dev->startBlock,dev->endBlock));
4584 chunkData = yaffs_GetTempBuffer(dev,__LINE__);
4587 dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER;
4591 blockIndex = YMALLOC(nBlocks * sizeof(yaffs_BlockIndex));
4595 // Scan all the blocks to determine their state
4596 for(blk = dev->startBlock; blk <= dev->endBlock; blk++)
4598 bi = yaffs_GetBlockInfo(dev,blk);
4599 yaffs_ClearChunkBits(dev,blk);
4601 bi->softDeletions = 0;
4603 yaffs_QueryInitialBlockState(dev,blk,&state,&sequenceNumber);
4605 bi->blockState = state;
4606 bi->sequenceNumber = sequenceNumber;
4608 T(YAFFS_TRACE_SCAN_DEBUG,(TSTR("Block scanning block %d state %d seq %d" TENDSTR),blk,state,sequenceNumber));
4610 if(state == YAFFS_BLOCK_STATE_DEAD)
4612 T(YAFFS_TRACE_BAD_BLOCKS,(TSTR("block %d is bad" TENDSTR),blk));
4614 else if(state == YAFFS_BLOCK_STATE_EMPTY)
4616 T(YAFFS_TRACE_SCAN_DEBUG,(TSTR("Block empty " TENDSTR)));
4617 dev->nErasedBlocks++;
4618 dev->nFreeChunks += dev->nChunksPerBlock;
4620 else if(state == YAFFS_BLOCK_STATE_NEEDS_SCANNING)
4623 // Determine the highest sequence number
4624 if( dev->isYaffs2 &&
4625 sequenceNumber >= YAFFS_LOWEST_SEQUENCE_NUMBER &&
4626 sequenceNumber < YAFFS_HIGHEST_SEQUENCE_NUMBER)
4629 blockIndex[nBlocksToScan].seq = sequenceNumber;
4630 blockIndex[nBlocksToScan].block = blk;
4634 if(sequenceNumber >= dev->sequenceNumber)
4636 dev->sequenceNumber = sequenceNumber;
4639 else if(dev->isYaffs2)
4641 // TODO: Nasty sequence number!
4642 T(YAFFS_TRACE_SCAN,(TSTR("Block scanning block %d has bad sequence number %d" TENDSTR),blk,sequenceNumber));
4649 // Dungy old bubble sort for now...
4652 yaffs_BlockIndex temp;
4656 for(i = 0; i < nBlocksToScan; i++)
4657 for(j = i+1; j < nBlocksToScan; j++)
4658 if(blockIndex[i].seq > blockIndex[j].seq)
4660 temp = blockIndex[j];
4661 blockIndex[j] = blockIndex[i];
4662 blockIndex[i] = temp;
4667 // Now scan the blocks looking at the data.
4671 endIterator = nBlocksToScan-1;
4672 T(YAFFS_TRACE_SCAN_DEBUG,(TSTR("%d blocks to be scanned" TENDSTR),nBlocksToScan));
4676 startIterator = dev->startBlock;
4677 endIterator = dev->endBlock;
4680 // For each block....
4681 for(blockIterator = startIterator; blockIterator <= endIterator; blockIterator++)
4686 // get the block to scan in the correct order
4687 blk = blockIndex[blockIterator].block;
4691 blk = blockIterator;
4695 bi = yaffs_GetBlockInfo(dev,blk);
4696 state = bi->blockState;
4700 // For each chunk in each block that needs scanning....
4701 for(c = 0; c < dev->nChunksPerBlock &&
4702 state == YAFFS_BLOCK_STATE_NEEDS_SCANNING; c++)
4704 // Read the tags and decide what to do
4705 chunk = blk * dev->nChunksPerBlock + c;
4707 yaffs_ReadChunkWithTagsFromNAND(dev,chunk,NULL,&tags);
4709 // Let's have a good look at this chunk...
4712 if(!dev->isYaffs2 && tags.chunkDeleted)
4717 dev->nFreeChunks ++;
4718 //T((" %d %d deleted\n",blk,c));
4720 else if(!tags.chunkUsed)
4722 // An unassigned chunk in the block
4723 // This means that either the block is empty or
4724 // this is the one being allocated from
4728 // We're looking at the first chunk in the block so the block is unused
4729 state = YAFFS_BLOCK_STATE_EMPTY;
4730 dev->nErasedBlocks++;
4734 // this is the block being allocated from
4735 T(YAFFS_TRACE_SCAN,(TSTR(" Allocating from %d %d" TENDSTR),blk,c));
4736 state = YAFFS_BLOCK_STATE_ALLOCATING;
4737 dev->allocationBlock = blk;
4738 dev->allocationPage = c;
4739 dev->allocationBlockFinder = blk; // Set it to here to encourage the allocator to
4740 // go forth from here.
4741 //Yaffs2 sanity check:
4742 // This should be the one with the highest sequence number
4743 if(dev->isYaffs2 && (dev->sequenceNumber != bi->sequenceNumber))
4745 T(YAFFS_TRACE_ALWAYS,
4746 (TSTR("yaffs: Allocation block %d was not highest sequence id: block seq = %d, dev seq = %d" TENDSTR),
4747 blk,bi->sequenceNumber,dev->sequenceNumber));
4751 dev->nFreeChunks += (dev->nChunksPerBlock - c);
4753 else if(tags.chunkId > 0)
4755 // chunkId > 0 so it is a data chunk...
4756 unsigned int endpos;
4758 yaffs_SetChunkBit(dev,blk,c);
4761 in = yaffs_FindOrCreateObjectByNumber(dev,tags.objectId,YAFFS_OBJECT_TYPE_FILE);
4762 // PutChunkIntoFile checks for a clash (two data chunks with
4763 // the same chunkId).
4764 yaffs_PutChunkIntoFile(in,tags.chunkId,chunk,1);
4765 endpos = (tags.chunkId - 1)* dev->nBytesPerChunk + tags.byteCount;
4766 if(in->variantType == YAFFS_OBJECT_TYPE_FILE && in->variant.fileVariant.scannedFileSize <endpos)
4768 in->variant.fileVariant.scannedFileSize = endpos;
4769 if(!dev->useHeaderFileSize)
4771 in->variant.fileVariant.fileSize = in->variant.fileVariant.scannedFileSize;
4775 //T((" %d %d data %d %d\n",blk,c,tags.objectId,tags.chunkId));
4779 // chunkId == 0, so it is an ObjectHeader.
4780 // Thus, we read in the object header and make the object
4781 yaffs_SetChunkBit(dev,blk,c);
4784 yaffs_ReadChunkWithTagsFromNAND(dev,chunk,chunkData,NULL);
4786 oh = (yaffs_ObjectHeader *)chunkData;
4788 in = yaffs_FindObjectByNumber(dev,tags.objectId);
4789 if(in && in->variantType != oh->type)
4791 // This should not happen, but somehow
4792 // Wev'e ended up with an objectId that has been reused but not yet
4793 // deleted, and worse still it has changed type. Delete the old object.
4795 yaffs_DestroyObject(in);
4800 in = yaffs_FindOrCreateObjectByNumber(dev,tags.objectId,oh->type);
4804 // We have already filled this one. We have a duplicate and need to resolve it.
4806 unsigned existingSerial = in->serial;
4807 unsigned newSerial = tags.serialNumber;
4809 if( dev->isYaffs2 ||
4810 ((existingSerial+1) & 3) == newSerial)
4812 // Use new one - destroy the exisiting one
4813 yaffs_DeleteChunk(dev,in->chunkId,1,__LINE__);
4818 // Use existing - destroy this one.
4819 yaffs_DeleteChunk(dev,chunk,1,__LINE__);
4824 (tags.objectId == YAFFS_OBJECTID_ROOT ||
4825 tags.objectId == YAFFS_OBJECTID_LOSTNFOUND))
4827 // We only load some info, don't fiddle with directory structure
4829 in->variantType = oh->type;
4831 in->st_mode = oh->st_mode;
4832 #ifdef CONFIG_YAFFS_WINCE
4833 in->win_atime[0] = oh->win_atime[0];
4834 in->win_ctime[0] = oh->win_ctime[0];
4835 in->win_mtime[0] = oh->win_mtime[0];
4836 in->win_atime[1] = oh->win_atime[1];
4837 in->win_ctime[1] = oh->win_ctime[1];
4838 in->win_mtime[1] = oh->win_mtime[1];
4840 in->st_uid = oh->st_uid;
4841 in->st_gid = oh->st_gid;
4842 in->st_atime = oh->st_atime;
4843 in->st_mtime = oh->st_mtime;
4844 in->st_ctime = oh->st_ctime;
4845 in->st_rdev = oh->st_rdev;
4847 in->chunkId = chunk;
4852 // we need to load this info
4855 in->variantType = oh->type;
4857 in->st_mode = oh->st_mode;
4858 #ifdef CONFIG_YAFFS_WINCE
4859 in->win_atime[0] = oh->win_atime[0];
4860 in->win_ctime[0] = oh->win_ctime[0];
4861 in->win_mtime[0] = oh->win_mtime[0];
4862 in->win_atime[1] = oh->win_atime[1];
4863 in->win_ctime[1] = oh->win_ctime[1];
4864 in->win_mtime[1] = oh->win_mtime[1];
4866 in->st_uid = oh->st_uid;
4867 in->st_gid = oh->st_gid;
4868 in->st_atime = oh->st_atime;
4869 in->st_mtime = oh->st_mtime;
4870 in->st_ctime = oh->st_ctime;
4871 in->st_rdev = oh->st_rdev;
4873 in->chunkId = chunk;
4875 yaffs_SetObjectName(in,oh->name);
4878 // directory stuff...
4879 // hook up to parent
4881 parent = yaffs_FindOrCreateObjectByNumber(dev,oh->parentObjectId,YAFFS_OBJECT_TYPE_DIRECTORY);
4882 if(parent->variantType == YAFFS_OBJECT_TYPE_UNKNOWN)
4884 // Set up as a directory
4885 parent->variantType = YAFFS_OBJECT_TYPE_DIRECTORY;
4886 INIT_LIST_HEAD(&parent->variant.directoryVariant.children);
4888 else if(parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
4890 // Hoosterman, another problem....
4891 // We're trying to use a non-directory as a directory
4893 T(YAFFS_TRACE_ERROR, (TSTR("yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found." TENDSTR)));
4894 parent = dev->lostNFoundDir;
4897 yaffs_AddObjectToDirectory(parent,in);
4899 if(0 && (parent == dev->deletedDir ||
4900 parent == dev->unlinkedDir))
4902 in->deleted = 1; // If it is unlinked at start up then it wants deleting
4903 dev->nDeletedFiles++;
4906 // Note re hardlinks.
4907 // Since we might scan a hardlink before its equivalent object is scanned
4908 // we put them all in a list.
4909 // After scanning is complete, we should have all the objects, so we run through this
4910 // list and fix up all the chains.
4912 switch(in->variantType)
4914 case YAFFS_OBJECT_TYPE_UNKNOWN: // Todo got a problem
4916 case YAFFS_OBJECT_TYPE_FILE:
4917 if(dev->isYaffs2 && oh->isShrink)
4919 // Prune back the shrunken chunks
4920 yaffs_PruneResizedChunks(in,oh->fileSize);
4921 // Mark the block as having a shrinkHeader
4922 bi->hasShrinkHeader = 1;
4925 if(dev->useHeaderFileSize)
4927 in->variant.fileVariant.fileSize = oh->fileSize;
4930 case YAFFS_OBJECT_TYPE_HARDLINK:
4931 in->variant.hardLinkVariant.equivalentObjectId = oh->equivalentObjectId;
4932 in->hardLinks.next = (struct list_head *)hardList;
4935 case YAFFS_OBJECT_TYPE_DIRECTORY: // Do nothing
4937 case YAFFS_OBJECT_TYPE_SPECIAL: // Do nothing
4939 case YAFFS_OBJECT_TYPE_SYMLINK: // Do nothing
4940 in->variant.symLinkVariant.alias = yaffs_CloneString(oh->alias);
4944 if(parent == dev->deletedDir)
4946 yaffs_DestroyObject(in);
4947 bi->hasShrinkHeader = 1;
4949 //T((" %d %d header %d \"%s\" type %d\n",blk,c,tags.objectId,oh->name,in->variantType));
4954 if(state == YAFFS_BLOCK_STATE_NEEDS_SCANNING)
4956 // If we got this far while scanning, then the block is fully allocated.
4957 state = YAFFS_BLOCK_STATE_FULL;
4960 bi->blockState = state;
4962 // Now let's see if it was dirty
4963 if( bi->pagesInUse == 0 &&
4964 !bi->hasShrinkHeader &&
4965 bi->blockState == YAFFS_BLOCK_STATE_FULL)
4967 yaffs_BlockBecameDirty(dev,blk);
4977 // Ok, we've done all the scanning.
4979 // Fix up the hard link chains.
4980 // We should now have scanned all the objects, now it's time to add these
4985 hardList = (yaffs_Object *)(hardList->hardLinks.next);
4987 in = yaffs_FindObjectByNumber(dev,hl->variant.hardLinkVariant.equivalentObjectId);
4991 // Add the hardlink pointers
4992 hl->variant.hardLinkVariant.equivalentObject=in;
4993 list_add(&hl->hardLinks,&in->hardLinks);
4997 //Todo Need to report/handle this better.
4998 // Got a problem... hardlink to a non-existant object
4999 hl->variant.hardLinkVariant.equivalentObject=NULL;
5000 INIT_LIST_HEAD(&hl->hardLinks);
5007 struct list_head *i;
5008 struct list_head *n;
5011 // Soft delete all the unlinked files
5012 list_for_each_safe(i,n,&dev->unlinkedDir->variant.directoryVariant.children)
5016 l = list_entry(i, yaffs_Object,siblings);
5017 yaffs_DestroyObject(l);
5022 yaffs_ReleaseTempBuffer(dev,chunkData,__LINE__);
5024 T(YAFFS_TRACE_SCAN,(TSTR("yaffs_Scan ends" TENDSTR)));
5030 static int yaffs_ScanBackwards(yaffs_Device *dev)
5032 yaffs_ExtendedTags tags;
5037 int nBlocksToScan = 0;
5042 yaffs_BlockState state;
5043 yaffs_Object *hardList = NULL;
5045 yaffs_BlockInfo *bi;
5047 yaffs_ObjectHeader *oh;
5049 yaffs_Object *parent;
5050 int nBlocks = dev->endBlock - dev->startBlock + 1;
5054 yaffs_BlockIndex *blockIndex = NULL;
5059 T(YAFFS_TRACE_SCAN,(TSTR("yaffs_ScanBackwards is only for YAFFS2!" TENDSTR)));
5063 T(YAFFS_TRACE_SCAN,(TSTR("yaffs_ScanBackwards starts startblk %d endblk %d..." TENDSTR),dev->startBlock,dev->endBlock));
5065 chunkData = yaffs_GetTempBuffer(dev,__LINE__);
5068 dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER;
5072 blockIndex = YMALLOC(nBlocks * sizeof(yaffs_BlockIndex));
5076 // Scan all the blocks to determine their state
5077 for(blk = dev->startBlock; blk <= dev->endBlock; blk++)
5079 bi = yaffs_GetBlockInfo(dev,blk);
5080 yaffs_ClearChunkBits(dev,blk);
5082 bi->softDeletions = 0;
5084 yaffs_QueryInitialBlockState(dev,blk,&state,&sequenceNumber);
5086 bi->blockState = state;
5087 bi->sequenceNumber = sequenceNumber;
5089 T(YAFFS_TRACE_SCAN_DEBUG,(TSTR("Block scanning block %d state %d seq %d" TENDSTR),blk,state,sequenceNumber));
5091 if(state == YAFFS_BLOCK_STATE_DEAD)
5093 T(YAFFS_TRACE_BAD_BLOCKS,(TSTR("block %d is bad" TENDSTR),blk));
5095 else if(state == YAFFS_BLOCK_STATE_EMPTY)
5097 T(YAFFS_TRACE_SCAN_DEBUG,(TSTR("Block empty " TENDSTR)));
5098 dev->nErasedBlocks++;
5099 dev->nFreeChunks += dev->nChunksPerBlock;
5101 else if(state == YAFFS_BLOCK_STATE_NEEDS_SCANNING)
5104 // Determine the highest sequence number
5105 if( dev->isYaffs2 &&
5106 sequenceNumber >= YAFFS_LOWEST_SEQUENCE_NUMBER &&
5107 sequenceNumber < YAFFS_HIGHEST_SEQUENCE_NUMBER)
5110 blockIndex[nBlocksToScan].seq = sequenceNumber;
5111 blockIndex[nBlocksToScan].block = blk;
5115 if(sequenceNumber >= dev->sequenceNumber)
5117 dev->sequenceNumber = sequenceNumber;
5120 else if(dev->isYaffs2)
5122 // TODO: Nasty sequence number!
5123 T(YAFFS_TRACE_SCAN,(TSTR("Block scanning block %d has bad sequence number %d" TENDSTR),blk,sequenceNumber));
5130 // Dungy old bubble sort for now...
5133 yaffs_BlockIndex temp;
5137 for(i = 0; i < nBlocksToScan; i++)
5138 for(j = i+1; j < nBlocksToScan; j++)
5139 if(blockIndex[i].seq > blockIndex[j].seq)
5141 temp = blockIndex[j];
5142 blockIndex[j] = blockIndex[i];
5143 blockIndex[i] = temp;
5148 // Now scan the blocks looking at the data.
5152 endIterator = nBlocksToScan-1;
5153 T(YAFFS_TRACE_SCAN_DEBUG,(TSTR("%d blocks to be scanned" TENDSTR),nBlocksToScan));
5157 // For each block.... backwards
5158 for(blockIterator = endIterator; blockIterator >= startIterator; blockIterator--)
5161 // get the block to scan in the correct order
5162 blk = blockIndex[blockIterator].block;
5165 bi = yaffs_GetBlockInfo(dev,blk);
5166 state = bi->blockState;
5170 if( 0 && // Disable since this is redundant.
5171 state == YAFFS_BLOCK_STATE_NEEDS_SCANNING)
5173 // Let's look at the first chunk in the block
5174 chunk = blk * dev->nChunksPerBlock;
5176 yaffs_ReadChunkWithTagsFromNAND(dev,chunk,NULL,&tags);
5178 // Let's have a good look at this chunk...
5182 // An unassigned chunk in the block
5183 // This means that either the block is empty or
5184 // this is the one being allocated from
5186 // We're looking at the first chunk in the block so the block is unused
5187 state = YAFFS_BLOCK_STATE_EMPTY;
5188 dev->nErasedBlocks++;
5189 dev->nFreeChunks += dev->nChunksPerBlock;
5194 // For each chunk in each block that needs scanning....
5195 for(c = dev->nChunksPerBlock-1; c >= 0 &&
5196 (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
5197 state == YAFFS_BLOCK_STATE_ALLOCATING); c--)
5199 // Scan backwards...
5200 // Read the tags and decide what to do
5201 chunk = blk * dev->nChunksPerBlock + c;
5203 yaffs_ReadChunkWithTagsFromNAND(dev,chunk,NULL,&tags);
5205 // Let's have a good look at this chunk...
5209 // An unassigned chunk in the block
5210 // This means that either the block is empty or
5211 // this is the one being allocated from
5215 // We're looking at the first chunk in the block so the block is unused
5216 state = YAFFS_BLOCK_STATE_EMPTY;
5217 dev->nErasedBlocks++;
5221 // this is the block being allocated from
5222 if(state == YAFFS_BLOCK_STATE_NEEDS_SCANNING)
5224 T(YAFFS_TRACE_SCAN,(TSTR(" Allocating from %d %d" TENDSTR),blk,c));
5226 state = YAFFS_BLOCK_STATE_ALLOCATING;
5227 dev->allocationBlock = blk;
5228 dev->allocationPage = c;
5229 dev->allocationBlockFinder = blk; // Set it to here to encourage the allocator to
5230 // go forth from here.
5231 //Yaffs2 sanity check:
5232 // This should be the one with the highest sequence number
5233 if(dev->isYaffs2 && (dev->sequenceNumber != bi->sequenceNumber))
5235 T(YAFFS_TRACE_ALWAYS,
5236 (TSTR("yaffs: Allocation block %d was not highest sequence id: block seq = %d, dev seq = %d" TENDSTR),
5237 blk,bi->sequenceNumber,dev->sequenceNumber));
5241 dev->nFreeChunks ++;
5243 else if(tags.chunkId > 0)
5245 // chunkId > 0 so it is a data chunk...
5246 unsigned int endpos;
5248 __u32 chunkBase = (tags.chunkId - 1)* dev->nBytesPerChunk;
5250 yaffs_SetChunkBit(dev,blk,c);
5253 in = yaffs_FindOrCreateObjectByNumber(dev,tags.objectId,YAFFS_OBJECT_TYPE_FILE);
5254 if(in->variantType == YAFFS_OBJECT_TYPE_FILE &&
5255 chunkBase < in->variant.fileVariant.shrinkSize)
5257 // This has not been invalidated by a resize
5258 yaffs_PutChunkIntoFile(in,tags.chunkId,chunk,-1);
5261 // File size is calculated by looking at the data chunks if we have not
5262 // seen an object header yet. Stop this practice once we find an object header.
5263 endpos = (tags.chunkId - 1)* dev->nBytesPerChunk + tags.byteCount;
5264 if(!in->valid && // have not got an object header yet
5265 in->variant.fileVariant.scannedFileSize <endpos)
5267 in->variant.fileVariant.scannedFileSize = endpos;
5268 in->variant.fileVariant.fileSize = in->variant.fileVariant.scannedFileSize;
5274 // This chunk has been invalidated by a resize, so delete
5275 yaffs_DeleteChunk(dev,chunk,1,__LINE__);
5279 //T((" %d %d data %d %d\n",blk,c,tags.objectId,tags.chunkId));
5283 // chunkId == 0, so it is an ObjectHeader.
5284 // Thus, we read in the object header and make the object
5285 yaffs_SetChunkBit(dev,blk,c);
5291 if(tags.extraHeaderInfoAvailable)
5293 in = yaffs_FindOrCreateObjectByNumber(dev,tags.objectId,tags.extraObjectType);
5297 if(!in || !in->valid)
5300 // If we don't have valid info then we need to read the chunk
5301 // TODO In future we can probably defer reading the chunk and
5302 // living with invalid data until needed.
5304 yaffs_ReadChunkWithTagsFromNAND(dev,chunk,chunkData,NULL);
5306 oh = (yaffs_ObjectHeader *)chunkData;
5309 in = yaffs_FindOrCreateObjectByNumber(dev,tags.objectId,oh->type);
5315 // TODO Hoosterman we have a problem!
5316 T(YAFFS_TRACE_ERROR, (TSTR("yaffs tragedy: Could not make object for object %d at chunk %d during scan" TENDSTR),tags.objectId,chunk));
5322 // We have already filled this one. We have a duplicate that will be discarded, but
5323 // we first have to suck out resize info if it is a file.
5325 if( (in->variantType == YAFFS_OBJECT_TYPE_FILE) &&
5326 ((oh && oh->type == YAFFS_OBJECT_TYPE_FILE) ||
5327 (tags.extraHeaderInfoAvailable && tags.extraObjectType == YAFFS_OBJECT_TYPE_FILE))
5330 __u32 thisSize = (oh) ? oh->fileSize : tags.extraFileLength;
5331 __u32 parentObjectId = (oh) ? oh->parentObjectId : tags.extraParentObjectId;
5332 unsigned isShrink = (oh) ? oh->isShrink : tags.extraIsShrinkHeader;
5334 // If it is deleted (unlinked at start also means deleted)
5335 // we treat the file size as being zeroed at this point.
5336 if(parentObjectId == YAFFS_OBJECTID_DELETED ||
5337 parentObjectId == YAFFS_OBJECTID_UNLINKED)
5343 if(in->variant.fileVariant.shrinkSize > thisSize)
5345 in->variant.fileVariant.shrinkSize = thisSize;
5350 bi->hasShrinkHeader = 1;
5354 // Use existing - destroy this one.
5355 yaffs_DeleteChunk(dev,chunk,1,__LINE__);
5360 (tags.objectId == YAFFS_OBJECTID_ROOT ||
5361 tags.objectId == YAFFS_OBJECTID_LOSTNFOUND))
5363 // We only load some info, don't fiddle with directory structure
5365 in->variantType = oh->type;
5367 in->st_mode = oh->st_mode;
5368 #ifdef CONFIG_YAFFS_WINCE
5369 in->win_atime[0] = oh->win_atime[0];
5370 in->win_ctime[0] = oh->win_ctime[0];
5371 in->win_mtime[0] = oh->win_mtime[0];
5372 in->win_atime[1] = oh->win_atime[1];
5373 in->win_ctime[1] = oh->win_ctime[1];
5374 in->win_mtime[1] = oh->win_mtime[1];
5376 in->st_uid = oh->st_uid;
5377 in->st_gid = oh->st_gid;
5378 in->st_atime = oh->st_atime;
5379 in->st_mtime = oh->st_mtime;
5380 in->st_ctime = oh->st_ctime;
5381 in->st_rdev = oh->st_rdev;
5383 in->chunkId = chunk;
5388 // we need to load this info
5391 in->variantType = oh->type;
5393 in->st_mode = oh->st_mode;
5394 #ifdef CONFIG_YAFFS_WINCE
5395 in->win_atime[0] = oh->win_atime[0];
5396 in->win_ctime[0] = oh->win_ctime[0];
5397 in->win_mtime[0] = oh->win_mtime[0];
5398 in->win_atime[1] = oh->win_atime[1];
5399 in->win_ctime[1] = oh->win_ctime[1];
5400 in->win_mtime[1] = oh->win_mtime[1];
5402 in->st_uid = oh->st_uid;
5403 in->st_gid = oh->st_gid;
5404 in->st_atime = oh->st_atime;
5405 in->st_mtime = oh->st_mtime;
5406 in->st_ctime = oh->st_ctime;
5407 in->st_rdev = oh->st_rdev;
5409 in->chunkId = chunk;
5411 yaffs_SetObjectName(in,oh->name);
5414 // directory stuff...
5415 // hook up to parent
5417 parent = yaffs_FindOrCreateObjectByNumber(dev,oh->parentObjectId,YAFFS_OBJECT_TYPE_DIRECTORY);
5418 if(parent->variantType == YAFFS_OBJECT_TYPE_UNKNOWN)
5420 // Set up as a directory
5421 parent->variantType = YAFFS_OBJECT_TYPE_DIRECTORY;
5422 INIT_LIST_HEAD(&parent->variant.directoryVariant.children);
5424 else if(parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
5426 // Hoosterman, another problem....
5427 // We're trying to use a non-directory as a directory
5429 T(YAFFS_TRACE_ERROR, (TSTR("yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found." TENDSTR)));
5430 parent = dev->lostNFoundDir;
5433 yaffs_AddObjectToDirectory(parent,in);
5435 if((parent == dev->deletedDir ||
5436 parent == dev->unlinkedDir))
5438 in->deleted = 1; // If it is unlinked at start up then it wants deleting
5443 // Mark the block as having a shrinkHeader
5444 bi->hasShrinkHeader = 1;
5448 // Note re hardlinks.
5449 // Since we might scan a hardlink before its equivalent object is scanned
5450 // we put them all in a list.
5451 // After scanning is complete, we should have all the objects, so we run through this
5452 // list and fix up all the chains.
5454 switch(in->variantType)
5456 case YAFFS_OBJECT_TYPE_UNKNOWN: // Todo got a problem
5458 case YAFFS_OBJECT_TYPE_FILE:
5461 if(in->variant.fileVariant.scannedFileSize < oh->fileSize)
5463 in->variant.fileVariant.fileSize = oh->fileSize;
5464 in->variant.fileVariant.scannedFileSize = in->variant.fileVariant.fileSize;
5469 if(in->variant.fileVariant.shrinkSize > oh->fileSize)
5471 in->variant.fileVariant.shrinkSize = oh->fileSize;
5476 case YAFFS_OBJECT_TYPE_HARDLINK:
5477 in->variant.hardLinkVariant.equivalentObjectId = oh->equivalentObjectId;
5478 in->hardLinks.next = (struct list_head *)hardList;
5481 case YAFFS_OBJECT_TYPE_DIRECTORY: // Do nothing
5483 case YAFFS_OBJECT_TYPE_SPECIAL: // Do nothing
5485 case YAFFS_OBJECT_TYPE_SYMLINK: // Do nothing
5486 in->variant.symLinkVariant.alias = yaffs_CloneString(oh->alias);
5491 if(parent == dev->deletedDir)
5493 yaffs_DestroyObject(in);
5494 bi->hasShrinkHeader = 1;
5497 //T((" %d %d header %d \"%s\" type %d\n",blk,c,tags.objectId,oh->name,in->variantType));
5502 if(state == YAFFS_BLOCK_STATE_NEEDS_SCANNING)
5504 // If we got this far while scanning, then the block is fully allocated.
5505 state = YAFFS_BLOCK_STATE_FULL;
5508 bi->blockState = state;
5510 // Now let's see if it was dirty
5511 if( bi->pagesInUse == 0 &&
5512 !bi->hasShrinkHeader &&
5513 bi->blockState == YAFFS_BLOCK_STATE_FULL)
5515 yaffs_BlockBecameDirty(dev,blk);
5525 // Ok, we've done all the scanning.
5527 // Fix up the hard link chains.
5528 // We should now have scanned all the objects, now it's time to add these
5533 hardList = (yaffs_Object *)(hardList->hardLinks.next);
5535 in = yaffs_FindObjectByNumber(dev,hl->variant.hardLinkVariant.equivalentObjectId);
5539 // Add the hardlink pointers
5540 hl->variant.hardLinkVariant.equivalentObject=in;
5541 list_add(&hl->hardLinks,&in->hardLinks);
5545 //Todo Need to report/handle this better.
5546 // Got a problem... hardlink to a non-existant object
5547 hl->variant.hardLinkVariant.equivalentObject=NULL;
5548 INIT_LIST_HEAD(&hl->hardLinks);
5555 struct list_head *i;
5556 struct list_head *n;
5560 // Soft delete all the unlinked files
5561 list_for_each_safe(i,n,&dev->unlinkedDir->variant.directoryVariant.children)
5565 l = list_entry(i, yaffs_Object,siblings);
5566 yaffs_DestroyObject(l);
5570 // Soft delete all the deletedDir files
5571 list_for_each_safe(i,n,&dev->deletedDir->variant.directoryVariant.children)
5575 l = list_entry(i, yaffs_Object,siblings);
5576 yaffs_DestroyObject(l);
5582 yaffs_ReleaseTempBuffer(dev,chunkData,__LINE__);
5584 T(YAFFS_TRACE_SCAN,(TSTR("yaffs_ScanBackwards ends" TENDSTR)));
5591 ////////////////////////// Directory Functions /////////////////////////
5594 static void yaffs_AddObjectToDirectory(yaffs_Object *directory, yaffs_Object *obj)
5599 T(YAFFS_TRACE_ALWAYS,(TSTR("tragedy: Trying to add an object to a null pointer directory" TENDSTR)));
5602 if(directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
5604 T(YAFFS_TRACE_ALWAYS,(TSTR("tragedy: Trying to add an object to a non-directory" TENDSTR)));
5608 if(obj->siblings.prev == NULL)
5611 INIT_LIST_HEAD(&obj->siblings);
5614 else if(!list_empty(&obj->siblings))
5616 // If it is holed up somewhere else, un hook it
5617 list_del_init(&obj->siblings);
5620 list_add(&obj->siblings,&directory->variant.directoryVariant.children);
5621 obj->parent = directory;
5623 if(directory == obj->myDev->unlinkedDir || directory == obj->myDev->deletedDir)
5626 obj->myDev->nUnlinkedFiles++;
5627 obj->renameAllowed = 0;
5631 static void yaffs_RemoveObjectFromDirectory(yaffs_Object *obj)
5633 list_del_init(&obj->siblings);
5637 yaffs_Object *yaffs_FindObjectByName(yaffs_Object *directory,const YCHAR *name)
5641 struct list_head *i;
5642 YCHAR buffer[YAFFS_MAX_NAME_LENGTH+1];
5649 T(YAFFS_TRACE_ALWAYS,(TSTR("tragedy: yaffs_FindObjectByName: null pointer directory"TENDSTR)));
5652 if(directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
5654 T(YAFFS_TRACE_ALWAYS,(TSTR("tragedy: yaffs_FindObjectByName: non-directory"TENDSTR)));
5658 sum = yaffs_CalcNameSum(name);
5660 list_for_each(i,&directory->variant.directoryVariant.children)
5664 l = list_entry(i, yaffs_Object,siblings);
5666 // Special case for lost-n-found
5667 if(l->objectId == YAFFS_OBJECTID_LOSTNFOUND)
5669 if(yaffs_strcmp(name,YAFFS_LOSTNFOUND_NAME) == 0)
5674 else if(yaffs_SumCompare(l->sum, sum)||
5675 l->chunkId <= 0) //LostnFound cunk called Objxxx
5678 yaffs_GetObjectName(l,buffer,YAFFS_MAX_NAME_LENGTH);
5679 if(yaffs_strcmp(name,buffer) == 0)
5692 int yaffs_ApplyToDirectoryChildren(yaffs_Object *theDir,int (*fn)(yaffs_Object *))
5694 struct list_head *i;
5700 T(YAFFS_TRACE_ALWAYS,(TSTR("tragedy: yaffs_FindObjectByName: null pointer directory"TENDSTR)));
5703 if(theDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
5705 T(YAFFS_TRACE_ALWAYS,(TSTR("tragedy: yaffs_FindObjectByName: non-directory"TENDSTR)));
5709 list_for_each(i,&theDir->variant.directoryVariant.children)
5713 l = list_entry(i, yaffs_Object,siblings);
5726 // GetEquivalentObject dereferences any hard links to get to the
5729 yaffs_Object *yaffs_GetEquivalentObject(yaffs_Object *obj)
5731 if(obj && obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK)
5733 // We want the object id of the equivalent object, not this one
5734 obj = obj->variant.hardLinkVariant.equivalentObject;
5740 int yaffs_GetObjectName(yaffs_Object *obj,YCHAR *name,int buffSize)
5742 memset(name,0,buffSize * sizeof(YCHAR));
5744 if(obj->objectId == YAFFS_OBJECTID_LOSTNFOUND)
5746 yaffs_strncpy(name,YAFFS_LOSTNFOUND_NAME,buffSize - 1);
5748 else if(obj->chunkId <= 0)
5752 yaffs_sprintf(locName,_Y("%s%d"),YAFFS_LOSTNFOUND_PREFIX,obj->objectId);
5753 yaffs_strncpy(name,locName,buffSize - 1);
5756 #ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM
5757 else if(obj->shortName[0])
5759 yaffs_strcpy(name,obj->shortName);
5764 __u8 *buffer = yaffs_GetTempBuffer(obj->myDev,__LINE__);
5766 yaffs_ObjectHeader *oh = (yaffs_ObjectHeader *)buffer;
5768 memset(buffer,0,obj->myDev->nBytesPerChunk);
5770 if(obj->chunkId >= 0)
5772 yaffs_ReadChunkWithTagsFromNAND(obj->myDev,obj->chunkId,buffer,NULL);
5774 yaffs_strncpy(name,oh->name,buffSize - 1);
5776 yaffs_ReleaseTempBuffer(obj->myDev,buffer,__LINE__);
5779 return yaffs_strlen(name);
5782 int yaffs_GetObjectFileLength(yaffs_Object *obj)
5785 // Dereference any hard linking
5786 obj = yaffs_GetEquivalentObject(obj);
5788 if(obj->variantType == YAFFS_OBJECT_TYPE_FILE)
5790 return obj->variant.fileVariant.fileSize;
5792 if(obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK)
5794 return yaffs_strlen(obj->variant.symLinkVariant.alias);
5798 // Only a directory should drop through to here
5799 return obj->myDev->nBytesPerChunk;
5803 int yaffs_GetObjectLinkCount(yaffs_Object *obj)
5806 struct list_head *i;
5810 count++; // the object itself
5812 list_for_each(i,&obj->hardLinks)
5814 count++; // add the hard links;
5821 int yaffs_GetObjectInode(yaffs_Object *obj)
5823 obj = yaffs_GetEquivalentObject(obj);
5825 return obj->objectId;
5828 unsigned yaffs_GetObjectType(yaffs_Object *obj)
5830 obj = yaffs_GetEquivalentObject(obj);
5832 switch(obj->variantType)
5834 case YAFFS_OBJECT_TYPE_FILE: return DT_REG; break;
5835 case YAFFS_OBJECT_TYPE_DIRECTORY: return DT_DIR; break;
5836 case YAFFS_OBJECT_TYPE_SYMLINK: return DT_LNK; break;
5837 case YAFFS_OBJECT_TYPE_HARDLINK: return DT_REG; break;
5838 case YAFFS_OBJECT_TYPE_SPECIAL:
5839 if(S_ISFIFO(obj->st_mode)) return DT_FIFO;
5840 if(S_ISCHR(obj->st_mode)) return DT_CHR;
5841 if(S_ISBLK(obj->st_mode)) return DT_BLK;
5842 if(S_ISSOCK(obj->st_mode)) return DT_SOCK;
5843 default: return DT_REG; break;
5847 YCHAR *yaffs_GetSymlinkAlias(yaffs_Object *obj)
5849 obj = yaffs_GetEquivalentObject(obj);
5850 if(obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK)
5852 return yaffs_CloneString(obj->variant.symLinkVariant.alias);
5856 return yaffs_CloneString(_Y(""));
5860 #ifndef CONFIG_YAFFS_WINCE
5862 int yaffs_SetAttributes(yaffs_Object *obj, struct iattr *attr)
5864 unsigned int valid = attr->ia_valid;
5866 if(valid & ATTR_MODE) obj->st_mode = attr->ia_mode;
5867 if(valid & ATTR_UID) obj->st_uid = attr->ia_uid;
5868 if(valid & ATTR_GID) obj->st_gid = attr->ia_gid;
5870 if(valid & ATTR_ATIME) obj->st_atime = Y_TIME_CONVERT(attr->ia_atime);
5871 if(valid & ATTR_CTIME) obj->st_ctime = Y_TIME_CONVERT(attr->ia_ctime);
5872 if(valid & ATTR_MTIME) obj->st_mtime = Y_TIME_CONVERT(attr->ia_mtime);
5874 if(valid & ATTR_SIZE) yaffs_ResizeFile(obj,attr->ia_size);
5876 yaffs_UpdateObjectHeader(obj,NULL,1,0);
5881 int yaffs_GetAttributes(yaffs_Object *obj, struct iattr *attr)
5883 unsigned int valid = 0;
5885 attr->ia_mode = obj->st_mode; valid |= ATTR_MODE;
5886 attr->ia_uid = obj->st_uid; valid |= ATTR_UID;
5887 attr->ia_gid = obj->st_gid; valid |= ATTR_GID;
5889 Y_TIME_CONVERT(attr->ia_atime)= obj->st_atime; valid |= ATTR_ATIME;
5890 Y_TIME_CONVERT(attr->ia_ctime) = obj->st_ctime; valid |= ATTR_CTIME;
5891 Y_TIME_CONVERT(attr->ia_mtime) = obj->st_mtime; valid |= ATTR_MTIME;
5893 attr->ia_size = yaffs_GetFileSize(obj); valid |= ATTR_SIZE;
5895 attr->ia_valid = valid;
5903 int yaffs_DumpObject(yaffs_Object *obj)
5905 // __u8 buffer[YAFFS_BYTES_PER_CHUNK];
5907 // yaffs_ObjectHeader *oh = (yaffs_ObjectHeader *)buffer;
5909 // memset(buffer,0,YAFFS_BYTES_PER_CHUNK);
5911 // if(obj->chunkId >= 0)
5913 // yaffs_ReadChunkFromNAND(obj->myDev,obj->chunkId,buffer,NULL);
5916 yaffs_GetObjectName(obj,name,256);
5918 T(YAFFS_TRACE_ALWAYS,(TSTR("Object %d, inode %d \"%s\"\n dirty %d valid %d serial %d sum %d chunk %d type %d size %d\n" TENDSTR),
5919 obj->objectId,yaffs_GetObjectInode(obj), name, obj->dirty, obj->valid, obj->serial,
5920 obj->sum, obj->chunkId, yaffs_GetObjectType(obj), yaffs_GetObjectFileLength(obj)));
5923 YPRINTF(("Object %d \"%s\"\n dirty %d valid %d serial %d sum %d chunk %d\n",
5924 obj->objectId, oh->name, obj->dirty, obj->valid, obj->serial,
5925 obj->sum, obj->chunkId));
5926 switch(obj->variantType)
5928 case YAFFS_OBJECT_TYPE_FILE:
5929 YPRINTF((" FILE length %d\n",obj->variant.fileVariant.fileSize));
5931 case YAFFS_OBJECT_TYPE_DIRECTORY:
5932 YPRINTF((" DIRECTORY\n"));
5934 case YAFFS_OBJECT_TYPE_HARDLINK: //todo
5935 case YAFFS_OBJECT_TYPE_SYMLINK:
5936 case YAFFS_OBJECT_TYPE_UNKNOWN:
5945 ///////////////////////// Initialisation code ///////////////////////////
5948 int yaffs_CheckDevFunctions(const yaffs_Device *dev)
5951 // Common functions, gotta have
5952 if(!dev->eraseBlockInNAND ||
5953 !dev->initialiseNAND) return 0;
5955 #ifdef CONFIG_YAFFS_YAFFS2
5957 // Can use the "with tags" style interface for yaffs1 or yaffs2
5958 if(dev->writeChunkWithTagsToNAND &&
5959 dev->readChunkWithTagsFromNAND &&
5960 !dev->writeChunkToNAND &&
5961 !dev->readChunkFromNAND &&
5962 dev->markNANDBlockBad &&
5963 dev->queryNANDBlock) return 1;
5966 // Can use the "spare" style interface for yaffs1
5967 if(!dev->isYaffs2 &&
5968 !dev->writeChunkWithTagsToNAND &&
5969 !dev->readChunkWithTagsFromNAND &&
5970 dev->writeChunkToNAND &&
5971 dev->readChunkFromNAND &&
5972 !dev->markNANDBlockBad &&
5973 !dev->queryNANDBlock) return 1;
5979 int yaffs_GutsInitialise(yaffs_Device *dev)
5986 T(YAFFS_TRACE_ALWAYS,(TSTR("yaffs: yaffs_GutsInitialise()" TENDSTR)));
5987 // Check stuff that must be set
5991 T(YAFFS_TRACE_ALWAYS,(TSTR("yaffs: Need a device" TENDSTR)));
5995 // Check geometry parameters.
5997 if( (dev->isYaffs2 && dev->nBytesPerChunk <1024) ||
5998 (!dev->isYaffs2 && dev->nBytesPerChunk !=512) ||
5999 dev->nChunksPerBlock < 2 ||
6000 dev->nReservedBlocks < 2 ||
6001 dev->startBlock <= 0 ||
6002 dev->endBlock <= 0 ||
6003 dev->endBlock <= (dev->startBlock + dev->nReservedBlocks + 2) // otherwise it is too small
6006 T(YAFFS_TRACE_ALWAYS,(TSTR("yaffs: NAND geometry problems: chunk size %d, type is yaffs%s " TENDSTR),
6007 dev->nBytesPerChunk, dev->isYaffs2 ? "2" : ""));
6011 if(yaffs_InitialiseNAND(dev) != YAFFS_OK)
6013 T(YAFFS_TRACE_ALWAYS,(TSTR("yaffs: InitialiseNAND failed" TENDSTR)));
6017 // Got the right mix of functions?
6019 if(!yaffs_CheckDevFunctions(dev))
6022 T(YAFFS_TRACE_ALWAYS,(TSTR("yaffs: device function(s) missing or wrong\n" TENDSTR)));
6027 // This is really a compilation check.
6028 if(!yaffs_CheckStructures())
6030 T(YAFFS_TRACE_ALWAYS,(TSTR("yaffs_CheckStructures failed\n" TENDSTR)));
6036 T(YAFFS_TRACE_ALWAYS,(TSTR("yaffs: device already mounted\n" TENDSTR)));
6042 // Finished with most checks. One or two more checks happen later on too.
6048 nBlocks = dev->endBlock - dev->startBlock + 1;
6052 // OK now calculate a few things for the device
6053 // Calculate chunkGroupBits.
6054 // We need to find the next power of 2 > than endBlock
6056 x = dev->nChunksPerBlock * (dev->endBlock+1);
6058 for(bits = extraBits = 0; x > 1; bits++)
6060 if(x & 1) extraBits++;
6064 if(extraBits > 0) bits++;
6067 // Level0 Tnodes are 16 bits, so if the bitwidth of the
6068 // chunk range we're using is greater than 16 we need
6069 // to figure out chunk shift and chunkGroupSize
6072 dev->chunkGroupBits = 0;
6076 dev->chunkGroupBits = bits - 16;
6079 dev->chunkGroupSize = 1 << dev->chunkGroupBits;
6081 if(dev->nChunksPerBlock < dev->chunkGroupSize)
6083 // We have a problem because the soft delete won't work if
6084 // the chunk group size > chunks per block.
6085 // This can be remedied by using larger "virtual blocks".
6086 T(YAFFS_TRACE_ALWAYS,(TSTR("yaffs: chunk group too large\n" TENDSTR)));
6092 // OK, we've finished verifying the device, lets continue with initialisation
6094 // More device initialisation
6095 dev->garbageCollections = 0;
6096 dev->passiveGarbageCollections = 0;
6097 dev->currentDirtyChecker = 0;
6098 dev->bufferedBlock = -1;
6099 dev->doingBufferedBlockRewrite = 0;
6100 dev->nDeletedFiles = 0;
6101 dev->nBackgroundDeletions=0;
6102 dev->nUnlinkedFiles = 0;
6105 dev->tagsEccFixed=0;
6106 dev->tagsEccUnfixed=0;
6107 dev->nErasureFailures = 0;
6108 dev->nErasedBlocks = 0;
6110 //dev->localBuffer = YMALLOC(dev->nBytesPerChunk);
6111 // Initialise temporary buffers
6114 for(i = 0; i < YAFFS_N_TEMP_BUFFERS; i++)
6116 dev->tempBuffer[i].line = 0; // not in use
6117 dev->tempBuffer[i].buffer = YMALLOC(dev->nBytesPerChunk);
6123 yaffs_InitialiseBlocks(dev,nBlocks);
6125 yaffs_InitialiseTnodes(dev);
6127 yaffs_InitialiseObjects(dev);
6129 dev->gcCleanupList = YMALLOC(dev->nChunksPerBlock * sizeof(__u32));
6131 if(dev->nShortOpCaches > 0)
6135 if(dev->nShortOpCaches > YAFFS_MAX_SHORT_OP_CACHES)
6137 dev->nShortOpCaches = YAFFS_MAX_SHORT_OP_CACHES;
6140 dev->srCache = YMALLOC( dev->nShortOpCaches * sizeof(yaffs_ChunkCache));
6142 for(i=0; i < dev->nShortOpCaches; i++)
6144 dev->srCache[i].object = NULL;
6145 dev->srCache[i].lastUse = 0;
6146 dev->srCache[i].dirty = 0;
6147 dev->srCache[i].data = YMALLOC(dev->nBytesPerChunk);
6155 // Initialise the unlinked, root and lost and found directories
6156 dev->lostNFoundDir = dev->rootDir = dev->unlinkedDir = dev->deletedDir = NULL;
6158 dev->unlinkedDir = yaffs_CreateFakeDirectory(dev,YAFFS_OBJECTID_UNLINKED, S_IFDIR);
6159 dev->deletedDir = yaffs_CreateFakeDirectory(dev,YAFFS_OBJECTID_DELETED, S_IFDIR);
6161 dev->rootDir = yaffs_CreateFakeDirectory(dev,YAFFS_OBJECTID_ROOT,YAFFS_ROOT_MODE | S_IFDIR);
6162 dev->lostNFoundDir = yaffs_CreateFakeDirectory(dev,YAFFS_OBJECTID_LOSTNFOUND,YAFFS_LOSTNFOUND_MODE | S_IFDIR);
6163 yaffs_AddObjectToDirectory(dev->rootDir,dev->lostNFoundDir);
6167 dev->useHeaderFileSize = 1;
6170 // Now scan the flash.
6173 yaffs_ScanBackwards(dev);
6178 dev->nPageReads = 0;
6179 dev->nPageWrites = 0;
6180 dev->nBlockErasures = 0;
6182 dev->nRetriedWrites = 0;
6184 dev->nRetiredBlocks = 0;
6186 T(YAFFS_TRACE_ALWAYS,(TSTR("yaffs: yaffs_GutsInitialise() done.\n" TENDSTR)));
6191 void yaffs_Deinitialise(yaffs_Device *dev)
6197 yaffs_DeinitialiseBlocks(dev);
6198 yaffs_DeinitialiseTnodes(dev);
6199 yaffs_DeinitialiseObjects(dev);
6200 if(dev->nShortOpCaches > 0)
6203 for(i=0; i < dev->nShortOpCaches; i++)
6205 YFREE(dev->srCache[i].data);
6208 YFREE(dev->srCache);
6211 YFREE(dev->gcCleanupList);
6213 for(i = 0; i < YAFFS_N_TEMP_BUFFERS; i++)
6215 YFREE(dev->tempBuffer[i].buffer);
6225 int yaffs_GetNumberOfFreeChunks(yaffs_Device *dev)
6227 int nFree = dev->nFreeChunks - (dev->nChunksPerBlock * YAFFS_RESERVED_BLOCKS);
6229 struct list_head *i;
6233 // To the free chunks add the chunks that are in the deleted unlinked files.
6234 list_for_each(i,&dev->deletedDir->variant.directoryVariant.children)
6236 l = list_entry(i, yaffs_Object,siblings);
6240 nFree += l->nDataChunks;
6245 // printf("___________ nFreeChunks is %d nFree is %d\n",dev->nFreeChunks,nFree);
6247 if(nFree < 0) nFree = 0;
6255 int yaffs_GetNumberOfFreeChunks(yaffs_Device *dev)
6260 int nDirtyCacheChunks=0;
6262 yaffs_BlockInfo *blk;
6264 struct list_head *i;
6267 for(nFree = 0, b = dev->startBlock; b <= dev->endBlock; b++)
6269 blk = yaffs_GetBlockInfo(dev,b);
6271 switch(blk->blockState)
6273 case YAFFS_BLOCK_STATE_EMPTY:
6274 case YAFFS_BLOCK_STATE_ALLOCATING:
6275 case YAFFS_BLOCK_STATE_FULL: nFree += (dev->nChunksPerBlock - blk->pagesInUse); break;
6283 // To the free chunks add the chunks that are in the deleted unlinked files.
6284 list_for_each(i,&dev->deletedDir->variant.directoryVariant.children)
6288 l = list_entry(i, yaffs_Object,siblings);
6292 pending += l->nDataChunks;
6299 //printf("___________ really free is %d, pending %d, nFree is %d\n",nFree,pending, nFree+pending);
6301 if(nFree != dev->nFreeChunks)
6303 // printf("___________Different! really free is %d, nFreeChunks %d\n",nFree dev->nFreeChunks);
6308 // Now count the number of dirty chunks in the cache and subtract those
6312 for(i = 0; i < dev->nShortOpCaches; i++)
6314 if(dev->srCache[i].dirty) nDirtyCacheChunks++;
6318 nFree -= nDirtyCacheChunks;
6320 nFree -= ((dev->nReservedBlocks + 1) * dev->nChunksPerBlock);
6322 if(nFree < 0) nFree = 0;
6330 /////////////////// YAFFS test code //////////////////////////////////
6332 #define yaffs_CheckStruct(structure,syze, name) \
6333 if(sizeof(structure) != syze) \
6335 T(YAFFS_TRACE_ALWAYS,(TSTR("%s should be %d but is %d\n" TENDSTR),name,syze,sizeof(structure))); \
6336 return YAFFS_FAIL; \
6340 static int yaffs_CheckStructures(void)
6342 // yaffs_CheckStruct(yaffs_Tags,8,"yaffs_Tags")
6343 // yaffs_CheckStruct(yaffs_TagsUnion,8,"yaffs_TagsUnion")
6344 // yaffs_CheckStruct(yaffs_Spare,16,"yaffs_Spare")
6345 #ifndef CONFIG_YAFFS_TNODE_LIST_DEBUG
6346 yaffs_CheckStruct(yaffs_Tnode,2* YAFFS_NTNODES_LEVEL0,"yaffs_Tnode")
6348 yaffs_CheckStruct(yaffs_ObjectHeader,512,"yaffs_ObjectHeader")
6355 void yaffs_GutsTest(yaffs_Device *dev)
6358 if(yaffs_CheckStructures() != YAFFS_OK)
6360 T(YAFFS_TRACE_ALWAYS,(TSTR("One or more structures malformed-- aborting\n" TENDSTR)));
6364 yaffs_TnodeTest(dev);
6365 yaffs_ObjectTest(dev);