2 * YAFFS: Yet another FFS. A NAND-flash specific file system.
4 * Copyright (C) 2002 Aleph One Ltd.
5 * for Toby Churchill Ltd and Brightstar Engineering
7 * Created by Charles Manning <charles@aleph1.co.uk>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
16 const char *yaffs_guts_c_version="$Id: yaffs_guts.c,v 1.11 2005-07-27 02:00:48 charles Exp $";
20 #include "yaffsinterface.h"
21 #include "yaffs_guts.h"
22 #include "yaffs_tagsvalidity.h"
25 #include "yaffs_tagscompat.h"
27 #ifdef CONFIG_YAFFS_WINCE
28 void yfsd_LockYAFFS(BOOL fsLockOnly);
29 void yfsd_UnlockYAFFS(BOOL fsLockOnly);
32 #define YAFFS_PASSIVE_GC_CHUNKS 2
35 // Use Steven Hill's ECC struff instead
36 // External functions for ECC on data
37 void nand_calculate_ecc (const u_char *dat, u_char *ecc_code);
38 int nand_correct_data (u_char *dat, u_char *read_ecc, u_char *calc_ecc);
39 #define yaffs_ECCCalculate(data,ecc) nand_calculate_ecc(data,ecc)
40 #define yaffs_ECCCorrect(data,read_ecc,calc_ecc) nand_correct_ecc(data,read_ecc,calc_ecc)
42 #include "yaffs_ecc.h"
46 // countBits is a quick way of counting the number of bits in a byte.
47 // ie. countBits[n] holds the number of 1 bits in a byte with the value n.
49 static const char yaffs_countBitsTable[256] =
51 0,1,1,2,1,2,2,3,1,2,2,3,2,3,3,4,
52 1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,
53 1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,
54 2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
55 1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,
56 2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
57 2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
58 3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7,
59 1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,
60 2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
61 2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
62 3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7,
63 2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
64 3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7,
65 3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7,
66 4,5,5,6,5,6,6,7,5,6,6,7,6,7,7,8
69 static int yaffs_CountBits(__u8 x)
72 retVal = yaffs_countBitsTable[x];
80 // Stuff using yea olde tags
81 static void yaffs_LoadTagsIntoSpare(yaffs_Spare *sparePtr, yaffs_Tags *tagsPtr);
82 static void yaffs_GetTagsFromSpare(yaffs_Device *dev, yaffs_Spare *sparePtr,yaffs_Tags *tagsPtr);
84 static int yaffs_ReadChunkTagsFromNAND(yaffs_Device *dev,int chunkInNAND, yaffs_Tags *tags, int *chunkDeleted);
85 static int yaffs_TagsMatch(const yaffs_Tags *tags, int objectId, int chunkInObject, int chunkDeleted);
92 static Y_INLINE int yaffs_ReadChunkWithTagsFromNAND(yaffs_Device *dev,int chunkInNAND, __u8 *buffer, yaffs_ExtendedTags *tags);
93 static Y_INLINE int yaffs_WriteChunkWithTagsToNAND(yaffs_Device *dev,int chunkInNAND, const __u8 *data, yaffs_ExtendedTags *tags);
94 static Y_INLINE int yaffs_MarkBlockBad(yaffs_Device *dev, int blockNo);
95 static Y_INLINE int yaffs_QueryInitialBlockState(yaffs_Device *dev,int blockNo, yaffs_BlockState *state,unsigned *sequenceNumber);
97 static int yaffs_WriteNewChunkWithTagsToNAND(yaffs_Device *dev, const __u8 *buffer, yaffs_ExtendedTags *tags, int useReserve);
99 static int yaffs_CheckObjectHashSanity(yaffs_Device *dev);
101 static int yaffs_PutChunkIntoFile(yaffs_Object *in,int chunkInInode, int chunkInNAND, int inScan);
103 static yaffs_Object *yaffs_CreateNewObject(yaffs_Device *dev,int number,yaffs_ObjectType type);
104 static void yaffs_AddObjectToDirectory(yaffs_Object *directory, yaffs_Object *obj);
105 static int yaffs_UpdateObjectHeader(yaffs_Object *in,const YCHAR *name, int force,int isShrink);
106 static void yaffs_RemoveObjectFromDirectory(yaffs_Object *obj);
107 static int yaffs_CheckStructures(void);
108 static int yaffs_DeleteWorker(yaffs_Object *in, yaffs_Tnode *tn, __u32 level, int chunkOffset,int *limit);
109 static int yaffs_DoGenericObjectDeletion(yaffs_Object *in);
111 static yaffs_BlockInfo *yaffs_GetBlockInfo(yaffs_Device *dev,int blockNo);
113 static __u8 *yaffs_GetTempBuffer(yaffs_Device *dev,int lineNo);
114 static void yaffs_ReleaseTempBuffer(yaffs_Device *dev, __u8 *buffer, int lineNo);
117 // Robustification (if it ever comes about...)
118 static void yaffs_RetireBlock(yaffs_Device *dev,int blockInNAND);
120 static void yaffs_HandleReadDataError(yaffs_Device *dev,int chunkInNAND);
122 static void yaffs_HandleWriteChunkError(yaffs_Device *dev,int chunkInNAND);
123 static void yaffs_HandleWriteChunkOk(yaffs_Device *dev,int chunkInNAND,const __u8 *data, const yaffs_ExtendedTags *tags);
124 static void yaffs_HandleUpdateChunk(yaffs_Device *dev,int chunkInNAND, const yaffs_ExtendedTags *tags);
126 static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,int chunkInNAND);
128 static int yaffs_UnlinkWorker(yaffs_Object *obj);
129 static void yaffs_DestroyObject(yaffs_Object *obj);
132 static int yaffs_VerifyCompare(const __u8 *d0, const __u8 * d1, const yaffs_Spare *s0, const yaffs_Spare *s1,int dataSize);
135 static int yaffs_TagsMatch(const yaffs_ExtendedTags *tags, int objectId, int chunkInObject);
138 loff_t yaffs_GetFileSize(yaffs_Object *obj);
141 static int yaffs_AllocateChunk(yaffs_Device *dev,int useReserve);
143 static void yaffs_VerifyFreeChunks(yaffs_Device *dev);
145 #ifdef YAFFS_PARANOID
146 static int yaffs_CheckFileSanity(yaffs_Object *in);
148 #define yaffs_CheckFileSanity(in)
151 static void yaffs_InvalidateWholeChunkCache(yaffs_Object *in);
152 static void yaffs_InvalidateChunkCache(yaffs_Object *object, int chunkId);
154 static int yaffs_ReadChunkWithTagsFromNAND(yaffs_Device *dev,int chunkInNAND, __u8 *buffer, yaffs_ExtendedTags *tags)
156 chunkInNAND -= dev->chunkOffset;
158 if(dev->readChunkWithTagsFromNAND)
159 return dev->readChunkWithTagsFromNAND(dev,chunkInNAND,buffer,tags);
161 return yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(dev,chunkInNAND,buffer,tags);
164 static Y_INLINE int yaffs_WriteChunkWithTagsToNAND(yaffs_Device *dev,int chunkInNAND, const __u8 *buffer, yaffs_ExtendedTags *tags)
166 chunkInNAND -= dev->chunkOffset;
170 tags->sequenceNumber = dev->sequenceNumber;
172 if(!yaffs_ValidateTags(tags))
174 T(YAFFS_TRACE_ERROR,(TSTR("Writing uninitialised tags" TENDSTR)));
177 T(YAFFS_TRACE_WRITE,(TSTR("Writing chunk %d tags %d %d"TENDSTR),chunkInNAND,tags->objectId,tags->chunkId));
181 T(YAFFS_TRACE_ERROR,(TSTR("Writing with no tags" TENDSTR)));
185 if(dev->writeChunkWithTagsToNAND)
186 return dev->writeChunkWithTagsToNAND(dev,chunkInNAND,buffer,tags);
188 return yaffs_TagsCompatabilityWriteChunkWithTagsToNAND(dev,chunkInNAND,buffer,tags);
191 static Y_INLINE int yaffs_MarkBlockBad(yaffs_Device *dev, int blockNo)
193 blockNo -= dev->blockOffset;
195 if(dev->markNANDBlockBad)
196 return dev->markNANDBlockBad(dev,blockNo);
198 return yaffs_TagsCompatabilityMarkNANDBlockBad(dev,blockNo);
200 static Y_INLINE int yaffs_QueryInitialBlockState(yaffs_Device *dev,int blockNo, yaffs_BlockState *state, unsigned *sequenceNumber)
202 blockNo -= dev->blockOffset;
204 if(dev->queryNANDBlock)
205 return dev->queryNANDBlock(dev,blockNo,state,sequenceNumber);
207 return yaffs_TagsCompatabilityQueryNANDBlock(dev,blockNo,state,sequenceNumber);
210 int yaffs_EraseBlockInNAND(struct yaffs_DeviceStruct *dev,int blockInNAND)
214 blockInNAND -= dev->blockOffset;
216 dev->nBlockErasures++;
217 result = dev->eraseBlockInNAND(dev,blockInNAND);
219 if(!result)result = dev->eraseBlockInNAND(dev,blockInNAND); // If at first we don't succeed, try again *once*.
223 static int yaffs_InitialiseNAND(struct yaffs_DeviceStruct *dev)
225 return dev->initialiseNAND(dev);
231 // Temporary buffer manipulations
233 static __u8 *yaffs_GetTempBuffer(yaffs_Device *dev,int lineNo)
236 for(i = 0; i < YAFFS_N_TEMP_BUFFERS; i++)
238 if(dev->tempBuffer[i].line == 0)
240 dev->tempBuffer[i].line = lineNo;
241 if((i+1) > dev->maxTemp)
243 dev->maxTemp = i + 1;
244 for(j = 0; j <= i; j++)
245 dev->tempBuffer[j].maxLine = dev->tempBuffer[j].line;
248 return dev->tempBuffer[i].buffer;
252 T(YAFFS_TRACE_BUFFERS,(TSTR("Out of temp buffers at line %d, other held by lines:"),lineNo));
253 for(i = 0; i < YAFFS_N_TEMP_BUFFERS; i++)
255 T(YAFFS_TRACE_BUFFERS,(TSTR(" %d "),dev->tempBuffer[i].line));
257 T(YAFFS_TRACE_BUFFERS,(TSTR(" "TENDSTR)));
259 dev->unmanagedTempAllocations++;
260 // Get an unmanaged one
261 return YMALLOC(dev->nBytesPerChunk);
266 static void yaffs_ReleaseTempBuffer(yaffs_Device *dev, __u8 *buffer, int lineNo)
269 for(i = 0; i < YAFFS_N_TEMP_BUFFERS; i++)
271 if(dev->tempBuffer[i].buffer == buffer)
273 dev->tempBuffer[i].line = 0;
280 // assume it is an unmanaged one.
281 T(YAFFS_TRACE_BUFFERS,(TSTR("Releasing unmanaged temp buffer in line %d" TENDSTR),lineNo));
283 dev->unmanagedTempDeallocations++;
289 // Chunk bitmap manipulations
291 static Y_INLINE __u8 *yaffs_BlockBits(yaffs_Device *dev, int blk)
293 if(blk < dev->internalStartBlock || blk > dev->internalEndBlock)
295 T(YAFFS_TRACE_ERROR,(TSTR("**>> yaffs: BlockBits block %d is not valid" TENDSTR),blk));
298 return dev->chunkBits + (dev->chunkBitmapStride * (blk - dev->internalStartBlock));
301 static Y_INLINE void yaffs_ClearChunkBits(yaffs_Device *dev,int blk)
303 __u8 *blkBits = yaffs_BlockBits(dev,blk);
305 memset(blkBits,0,dev->chunkBitmapStride);
308 static Y_INLINE void yaffs_ClearChunkBit(yaffs_Device *dev,int blk,int chunk)
310 __u8 *blkBits = yaffs_BlockBits(dev,blk);
312 blkBits[chunk/8] &= ~ (1<<(chunk & 7));
315 static Y_INLINE void yaffs_SetChunkBit(yaffs_Device *dev,int blk,int chunk)
317 __u8 *blkBits = yaffs_BlockBits(dev,blk);
319 blkBits[chunk/8] |= (1<<(chunk & 7));
322 static Y_INLINE int yaffs_CheckChunkBit(yaffs_Device *dev,int blk,int chunk)
324 __u8 *blkBits = yaffs_BlockBits(dev,blk);
325 return (blkBits[chunk/8] & (1<<(chunk & 7))) ? 1 :0;
328 static Y_INLINE int yaffs_StillSomeChunkBits(yaffs_Device *dev,int blk)
330 __u8 *blkBits = yaffs_BlockBits(dev,blk);
332 for(i = 0; i < dev->chunkBitmapStride; i++)
334 if(*blkBits) return 1;
341 static Y_INLINE int yaffs_HashFunction(int n)
343 return (n % YAFFS_NOBJECT_BUCKETS);
347 yaffs_Object *yaffs_Root(yaffs_Device *dev)
352 yaffs_Object *yaffs_LostNFound(yaffs_Device *dev)
354 return dev->lostNFoundDir;
360 int yaffs_CheckFF(__u8 *buffer,int nBytes)
362 //Horrible, slow implementation
365 if(*buffer != 0xFF) return 0;
371 static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,int chunkInNAND)
374 int retval = YAFFS_OK;
375 __u8 *data = yaffs_GetTempBuffer(dev,__LINE__);
376 yaffs_ExtendedTags tags;
378 // NCB dev->readChunkWithTagsFromNAND(dev,chunkInNAND,data,&tags);
379 yaffs_ReadChunkWithTagsFromNAND(dev,chunkInNAND,data,&tags);
381 if(!yaffs_CheckFF(data,dev->nBytesPerChunk) || tags.chunkUsed)
383 T(YAFFS_TRACE_NANDACCESS,(TSTR("Chunk %d not erased" TENDSTR),chunkInNAND));
387 yaffs_ReleaseTempBuffer(dev,data,__LINE__);
396 static int yaffs_WriteNewChunkWithTagsToNAND(struct yaffs_DeviceStruct *dev, const __u8 *data, yaffs_ExtendedTags *tags,int useReserve)
406 chunk = yaffs_AllocateChunk(dev,useReserve);
411 // First check this chunk is erased...
412 #ifndef CONFIG_YAFFS_DISABLE_CHUNK_ERASED_CHECK
413 writeOk = yaffs_CheckChunkErased(dev,chunk);
417 T(YAFFS_TRACE_ERROR,(TSTR("**>> yaffs chunk %d was not erased" TENDSTR),chunk));
421 writeOk = yaffs_WriteChunkWithTagsToNAND(dev,chunk,data,tags);
427 // Copy the data into the robustification buffer.
428 // NB We do this at the end to prevent duplicates in the case of a write error.
430 yaffs_HandleWriteChunkOk(dev,chunk,data,tags);
434 yaffs_HandleWriteChunkError(dev,chunk);
438 } while(chunk >= 0 && ! writeOk);
442 T(YAFFS_TRACE_ERROR,(TSTR("**>> yaffs write required %d attempts" TENDSTR),attempts));
443 dev->nRetriedWrites+= (attempts - 1);
454 // Functions for robustisizing
458 static void yaffs_RetireBlock(yaffs_Device *dev,int blockInNAND)
461 yaffs_MarkBlockBad(dev,blockInNAND);
463 yaffs_GetBlockInfo(dev,blockInNAND)->blockState = YAFFS_BLOCK_STATE_DEAD;
465 dev->nRetiredBlocks++;
470 static int yaffs_RewriteBufferedBlock(yaffs_Device *dev)
472 dev->doingBufferedBlockRewrite = 1;
474 // Remove erased chunks
475 // Rewrite existing chunks to a new block
476 // Set current write block to the new block
478 dev->doingBufferedBlockRewrite = 0;
484 static void yaffs_HandleReadDataError(yaffs_Device *dev,int chunkInNAND)
486 int blockInNAND = chunkInNAND/dev->nChunksPerBlock;
488 // Mark the block for retirement
489 yaffs_GetBlockInfo(dev,blockInNAND)->needsRetiring = 1;
490 T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,(TSTR("**>>Block %d marked for retirement" TENDSTR),blockInNAND));
494 // Just do a garbage collection on the affected block then retire the block
499 static void yaffs_CheckWrittenBlock(yaffs_Device *dev,int chunkInNAND)
505 static void yaffs_HandleWriteChunkOk(yaffs_Device *dev,int chunkInNAND,const __u8 *data, const yaffs_ExtendedTags *tags)
509 static void yaffs_HandleUpdateChunk(yaffs_Device *dev,int chunkInNAND, const yaffs_ExtendedTags *tags)
513 static void yaffs_HandleWriteChunkError(yaffs_Device *dev,int chunkInNAND)
515 int blockInNAND = chunkInNAND/dev->nChunksPerBlock;
517 // Mark the block for retirement
518 yaffs_GetBlockInfo(dev,blockInNAND)->needsRetiring = 1;
520 yaffs_DeleteChunk(dev,chunkInNAND,1,__LINE__);
526 static int yaffs_VerifyCompare(const __u8 *d0, const __u8 * d1, const yaffs_Spare *s0, const yaffs_Spare *s1,int dataSize)
530 if( memcmp(d0,d1,dataSize) != 0 ||
531 s0->tagByte0 != s1->tagByte0 ||
532 s0->tagByte1 != s1->tagByte1 ||
533 s0->tagByte2 != s1->tagByte2 ||
534 s0->tagByte3 != s1->tagByte3 ||
535 s0->tagByte4 != s1->tagByte4 ||
536 s0->tagByte5 != s1->tagByte5 ||
537 s0->tagByte6 != s1->tagByte6 ||
538 s0->tagByte7 != s1->tagByte7 ||
539 s0->ecc1[0] != s1->ecc1[0] ||
540 s0->ecc1[1] != s1->ecc1[1] ||
541 s0->ecc1[2] != s1->ecc1[2] ||
542 s0->ecc2[0] != s1->ecc2[0] ||
543 s0->ecc2[1] != s1->ecc2[1] ||
544 s0->ecc2[2] != s1->ecc2[2] )
554 ///////////////////////// Object management //////////////////
555 // List of spare objects
556 // The list is hooked together using the first pointer
559 // static yaffs_Object *yaffs_freeObjects = NULL;
561 // static int yaffs_nFreeObjects;
563 // static yaffs_ObjectList *yaffs_allocatedObjectList = NULL;
565 // static yaffs_ObjectBucket yaffs_objectBucket[YAFFS_NOBJECT_BUCKETS];
568 static __u16 yaffs_CalcNameSum(const YCHAR *name)
573 YUCHAR *bname = (YUCHAR *)name;
576 while ((*bname) && (i <=YAFFS_MAX_NAME_LENGTH))
579 #ifdef CONFIG_YAFFS_CASE_INSENSITIVE
580 sum += yaffs_toupper(*bname) * i;
591 void yaffs_SetObjectName(yaffs_Object *obj, const YCHAR *name)
593 #ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM
594 if(name && yaffs_strlen(name) <= YAFFS_SHORT_NAME_LENGTH)
596 yaffs_strcpy(obj->shortName,name);
600 obj->shortName[0]=_Y('\0');
603 obj->sum = yaffs_CalcNameSum(name);
607 void yaffs_CalcECC(const __u8 *data, yaffs_Spare *spare)
609 yaffs_ECCCalculate(data , spare->ecc1);
610 yaffs_ECCCalculate(&data[256] , spare->ecc2);
615 ///////////////////////// TNODES ///////////////////////
617 // List of spare tnodes
618 // The list is hooked together using the first pointer
621 //static yaffs_Tnode *yaffs_freeTnodes = NULL;
623 // static int yaffs_nFreeTnodes;
625 //static yaffs_TnodeList *yaffs_allocatedTnodeList = NULL;
629 // yaffs_CreateTnodes creates a bunch more tnodes and
630 // adds them to the tnode free list.
631 // Don't use this function directly
633 static int yaffs_CreateTnodes(yaffs_Device *dev,int nTnodes)
636 yaffs_Tnode *newTnodes;
637 yaffs_TnodeList *tnl;
639 if(nTnodes < 1) return YAFFS_OK;
643 newTnodes = YMALLOC(nTnodes * sizeof(yaffs_Tnode));
647 T(YAFFS_TRACE_ERROR,(TSTR("yaffs: Could not allocate Tnodes"TENDSTR)));
651 // Hook them into the free list
652 for(i = 0; i < nTnodes - 1; i++)
654 newTnodes[i].internal[0] = &newTnodes[i+1];
655 #ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
656 newTnodes[i].internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
660 newTnodes[nTnodes - 1].internal[0] = dev->freeTnodes;
661 #ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
662 newTnodes[nTnodes - 1].internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
664 dev->freeTnodes = newTnodes;
665 dev->nFreeTnodes+= nTnodes;
666 dev->nTnodesCreated += nTnodes;
668 // Now add this bunch of tnodes to a list for freeing up.
669 // NB If we can't add this to the management list it isn't fatal
670 // but it just means we can't free this bunch of tnodes later.
671 tnl = YMALLOC(sizeof(yaffs_TnodeList));
674 T(YAFFS_TRACE_ERROR,(TSTR("yaffs: Could not add tnodes to management list" TENDSTR)));
679 tnl->tnodes = newTnodes;
680 tnl->next = dev->allocatedTnodeList;
681 dev->allocatedTnodeList = tnl;
685 T(YAFFS_TRACE_ALLOCATE,(TSTR("yaffs: Tnodes added" TENDSTR)));
692 // GetTnode gets us a clean tnode. Tries to make allocate more if we run out
693 static yaffs_Tnode *yaffs_GetTnode(yaffs_Device *dev)
695 yaffs_Tnode *tn = NULL;
697 // If there are none left make more
700 yaffs_CreateTnodes(dev,YAFFS_ALLOCATION_NTNODES);
705 tn = dev->freeTnodes;
706 #ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
707 if(tn->internal[YAFFS_NTNODES_INTERNAL] != (void *)1)
709 // Hoosterman, this thing looks like it isn't in the list
710 T(YAFFS_TRACE_ALWAYS,(TSTR("yaffs: Tnode list bug 1" TENDSTR)));
713 dev->freeTnodes = dev->freeTnodes->internal[0];
716 memset(tn,0,sizeof(yaffs_Tnode));
724 // FreeTnode frees up a tnode and puts it back on the free list
725 static void yaffs_FreeTnode(yaffs_Device*dev, yaffs_Tnode *tn)
729 #ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
730 if(tn->internal[YAFFS_NTNODES_INTERNAL] != 0)
732 // Hoosterman, this thing looks like it is already in the list
733 T(YAFFS_TRACE_ALWAYS,(TSTR("yaffs: Tnode list bug 2" TENDSTR)));
735 tn->internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
737 tn->internal[0] = dev->freeTnodes;
738 dev->freeTnodes = tn;
744 static void yaffs_DeinitialiseTnodes(yaffs_Device*dev)
746 // Free the list of allocated tnodes
747 yaffs_TnodeList *tmp;
749 while(dev->allocatedTnodeList)
751 tmp = dev->allocatedTnodeList->next;
753 YFREE(dev->allocatedTnodeList->tnodes);
754 YFREE(dev->allocatedTnodeList);
755 dev->allocatedTnodeList = tmp;
759 dev->freeTnodes = NULL;
760 dev->nFreeTnodes = 0;
763 static void yaffs_InitialiseTnodes(yaffs_Device*dev)
765 dev->allocatedTnodeList = NULL;
766 dev->freeTnodes = NULL;
767 dev->nFreeTnodes = 0;
768 dev->nTnodesCreated = 0;
773 void yaffs_TnodeTest(yaffs_Device *dev)
778 yaffs_Tnode *tn[1000];
780 YINFO("Testing TNodes");
782 for(j = 0; j < 50; j++)
784 for(i = 0; i < 1000; i++)
786 tn[i] = yaffs_GetTnode(dev);
789 YALERT("Getting tnode failed");
792 for(i = 0; i < 1000; i+=3)
794 yaffs_FreeTnode(dev,tn[i]);
803 ////////////////// END OF TNODE MANIPULATION ///////////////////////////
805 /////////////// Functions to manipulate the look-up tree (made up of tnodes)
806 // The look up tree is represented by the top tnode and the number of topLevel
807 // in the tree. 0 means only the level 0 tnode is in the tree.
810 // FindLevel0Tnode finds the level 0 tnode, if one exists.
811 // Used when reading.....
812 static yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device *dev,yaffs_FileStructure *fStruct, __u32 chunkId)
815 yaffs_Tnode *tn = fStruct->top;
817 int requiredTallness;
818 int level = fStruct->topLevel;
820 // Check sane level and chunk Id
821 if(level < 0 || level > YAFFS_TNODES_MAX_LEVEL)
824 // sprintf(str,"Bad level %d",level);
829 if(chunkId > YAFFS_MAX_CHUNK_ID)
832 // sprintf(str,"Bad chunkId %d",chunkId);
837 // First check we're tall enough (ie enough topLevel)
839 i = chunkId >> (/*dev->chunkGroupBits + */YAFFS_TNODES_LEVEL0_BITS);
840 requiredTallness = 0;
843 i >>= YAFFS_TNODES_INTERNAL_BITS;
848 if(requiredTallness > fStruct->topLevel)
850 // Not tall enough, so we can't find it, return NULL.
855 // Traverse down to level 0
856 while (level > 0 && tn)
858 tn = tn->internal[(chunkId >>(/* dev->chunkGroupBits + */ YAFFS_TNODES_LEVEL0_BITS + (level-1) * YAFFS_TNODES_INTERNAL_BITS)) &
859 YAFFS_TNODES_INTERNAL_MASK];
867 // AddOrFindLevel0Tnode finds the level 0 tnode if it exists, otherwise first expands the tree.
868 // This happens in two steps:
869 // 1. If the tree isn't tall enough, then make it taller.
870 // 2. Scan down the tree towards the level 0 tnode adding tnodes if required.
872 // Used when modifying the tree.
874 static yaffs_Tnode *yaffs_AddOrFindLevel0Tnode(yaffs_Device *dev, yaffs_FileStructure *fStruct, __u32 chunkId)
879 int requiredTallness;
886 //T((TSTR("AddOrFind topLevel=%d, chunk=%d"),fStruct->topLevel,chunkId));
888 // Check sane level and page Id
889 if(fStruct->topLevel < 0 || fStruct->topLevel > YAFFS_TNODES_MAX_LEVEL)
892 // sprintf(str,"Bad level %d",fStruct->topLevel);
897 if(chunkId > YAFFS_MAX_CHUNK_ID)
900 // sprintf(str,"Bad chunkId %d",chunkId);
905 // First check we're tall enough (ie enough topLevel)
907 x = chunkId >> (/*dev->chunkGroupBits + */YAFFS_TNODES_LEVEL0_BITS);
908 requiredTallness = 0;
911 x >>= YAFFS_TNODES_INTERNAL_BITS;
915 //T((TSTR(" required=%d"),requiredTallness));
918 if(requiredTallness > fStruct->topLevel)
920 // Not tall enough,gotta make the tree taller
921 for(i = fStruct->topLevel; i < requiredTallness; i++)
923 //T((TSTR(" add new top")));
925 tn = yaffs_GetTnode(dev);
929 tn->internal[0] = fStruct->top;
934 T(YAFFS_TRACE_ERROR,(TSTR("yaffs: no more tnodes" TENDSTR)));
938 fStruct->topLevel = requiredTallness;
942 // Traverse down to level 0, adding anything we need
944 l = fStruct->topLevel;
948 x = (chunkId >> (/*dev->chunkGroupBits + */YAFFS_TNODES_LEVEL0_BITS + (l-1) * YAFFS_TNODES_INTERNAL_BITS)) &
949 YAFFS_TNODES_INTERNAL_MASK;
951 //T((TSTR(" [%d:%d]"),l,i));
955 //T((TSTR(" added")));
957 tn->internal[x] = yaffs_GetTnode(dev);
960 tn = tn->internal[x];
971 int yaffs_FindChunkInGroup(yaffs_Device *dev, int theChunk, yaffs_ExtendedTags *tags, int objectId, int chunkInInode)
976 for(j = 0; theChunk && j < dev->chunkGroupSize; j++)
978 if(yaffs_CheckChunkBit(dev,theChunk / dev->nChunksPerBlock,theChunk % dev->nChunksPerBlock))
980 yaffs_ReadChunkWithTagsFromNAND(dev,theChunk,NULL,tags);
981 if(yaffs_TagsMatch(tags,objectId,chunkInInode))
993 // DeleteWorker scans backwards through the tnode tree and deletes all the
994 // chunks and tnodes in the file
995 // Returns 1 if the tree was deleted. Returns 0 if it stopped early due to hitting the limit and the delete is incomplete.
997 static int yaffs_DeleteWorker(yaffs_Object *in, yaffs_Tnode *tn, __u32 level, int chunkOffset,int *limit)
1002 yaffs_ExtendedTags tags;
1004 yaffs_Device *dev = in->myDev;
1014 for(i = YAFFS_NTNODES_INTERNAL -1; allDone && i >= 0; i--)
1018 if(limit && (*limit) < 0)
1024 allDone = yaffs_DeleteWorker(in,tn->internal[i],level - 1,
1025 (chunkOffset << YAFFS_TNODES_INTERNAL_BITS ) + i ,limit);
1029 yaffs_FreeTnode(dev,tn->internal[i]);
1030 tn->internal[i] = NULL;
1035 return (allDone) ? 1 : 0;
1041 for(i = YAFFS_NTNODES_LEVEL0 -1; i >= 0 && !hitLimit; i--)
1046 chunkInInode = (chunkOffset << YAFFS_TNODES_LEVEL0_BITS ) + i;
1048 theChunk = tn->level0[i] << dev->chunkGroupBits;
1050 foundChunk = yaffs_FindChunkInGroup(dev,theChunk,&tags,in->objectId,chunkInInode);
1054 yaffs_DeleteChunk(dev,foundChunk,1,__LINE__);
1071 return (i < 0) ? 1 : 0;
1083 static void yaffs_SoftDeleteChunk(yaffs_Device *dev, int chunk)
1086 yaffs_BlockInfo *theBlock;
1088 T(YAFFS_TRACE_DELETION,(TSTR("soft delete chunk %d" TENDSTR),chunk));
1090 theBlock = yaffs_GetBlockInfo(dev, chunk/dev->nChunksPerBlock);
1093 theBlock->softDeletions++;
1098 // SoftDeleteWorker scans backwards through the tnode tree and soft deletes all the chunks in the file.
1099 // All soft deleting does is increment the block's softdelete count and pulls the chunk out
1101 // THus, essentially this is the same as DeleteWorker except that the chunks are soft deleted.
1103 static int yaffs_SoftDeleteWorker(yaffs_Object *in, yaffs_Tnode *tn, __u32 level, int chunkOffset)
1108 yaffs_Device *dev = in->myDev;
1116 for(i = YAFFS_NTNODES_INTERNAL -1; allDone && i >= 0; i--)
1120 allDone = yaffs_SoftDeleteWorker(in,tn->internal[i],level - 1,
1121 (chunkOffset << YAFFS_TNODES_INTERNAL_BITS ) + i);
1124 yaffs_FreeTnode(dev,tn->internal[i]);
1125 tn->internal[i] = NULL;
1129 //Hoosterman... how could this happen.
1133 return (allDone) ? 1 : 0;
1138 for(i = YAFFS_NTNODES_LEVEL0 -1; i >=0; i--)
1142 // Note this does not find the real chunk, only the chunk group.
1143 // We make an assumption that a chunk group is niot larger than a block.
1144 theChunk = (tn->level0[i] << dev->chunkGroupBits);
1146 yaffs_SoftDeleteChunk(dev,theChunk);
1163 static void yaffs_SoftDeleteFile(yaffs_Object *obj)
1166 obj->variantType == YAFFS_OBJECT_TYPE_FILE &&
1169 if(obj->nDataChunks <= 0)
1171 // Empty file with no duplicate object headers, just delete it immediately
1172 yaffs_FreeTnode(obj->myDev,obj->variant.fileVariant.top);
1173 obj->variant.fileVariant.top = NULL;
1174 T(YAFFS_TRACE_TRACING,(TSTR("yaffs: Deleting empty file %d" TENDSTR),obj->objectId));
1175 yaffs_DoGenericObjectDeletion(obj);
1179 yaffs_SoftDeleteWorker(obj, obj->variant.fileVariant.top, obj->variant.fileVariant.topLevel, 0);
1180 obj->softDeleted = 1;
1189 // Pruning removes any part of the file structure tree that is beyond the
1190 // bounds of the file (ie that does not point to chunks).
1192 // A file should only get pruned when its size is reduced.
1194 // Before pruning, the chunks must be pulled from the tree and the
1195 // level 0 tnode entries must be zeroed out.
1196 // Could also use this for file deletion, but that's probably better handled
1197 // by a special case.
1199 // yaffs_PruneWorker should only be called by yaffs_PruneFileStructure()
1201 static yaffs_Tnode *yaffs_PruneWorker(yaffs_Device *dev, yaffs_Tnode *tn, __u32 level, int del0)
1210 for(i = 0; i < YAFFS_NTNODES_INTERNAL; i++)
1212 if(tn->internal[i] && level > 0)
1214 tn->internal[i] = yaffs_PruneWorker(dev,tn->internal[i],level - 1, ( i == 0) ? del0 : 1);
1223 if(hasData == 0 && del0)
1225 // Free and return NULL
1227 yaffs_FreeTnode(dev,tn);
1237 static int yaffs_PruneFileStructure(yaffs_Device *dev, yaffs_FileStructure *fStruct)
1244 if(fStruct->topLevel > 0)
1246 fStruct->top = yaffs_PruneWorker(dev,fStruct->top, fStruct->topLevel,0);
1248 // Now we have a tree with all the non-zero branches NULL but the height
1249 // is the same as it was.
1250 // Let's see if we can trim internal tnodes to shorten the tree.
1251 // We can do this if only the 0th element in the tnode is in use
1252 // (ie all the non-zero are NULL)
1254 while(fStruct->topLevel && !done)
1259 for(i = 1; i <YAFFS_NTNODES_INTERNAL; i++)
1269 fStruct->top = tn->internal[0];
1270 fStruct->topLevel--;
1271 yaffs_FreeTnode(dev,tn);
1287 /////////////////////// End of File Structure functions. /////////////////
1289 // yaffs_CreateFreeObjects creates a bunch more objects and
1290 // adds them to the object free list.
1291 static int yaffs_CreateFreeObjects(yaffs_Device *dev, int nObjects)
1294 yaffs_Object *newObjects;
1295 yaffs_ObjectList *list;
1297 if(nObjects < 1) return YAFFS_OK;
1299 // make these things
1301 newObjects = YMALLOC(nObjects * sizeof(yaffs_Object));
1305 T(YAFFS_TRACE_ALLOCATE,(TSTR("yaffs: Could not allocate more objects" TENDSTR)));
1309 // Hook them into the free list
1310 for(i = 0; i < nObjects - 1; i++)
1312 newObjects[i].siblings.next = (struct list_head *)(&newObjects[i+1]);
1315 newObjects[nObjects - 1].siblings.next = (void *)dev->freeObjects;
1316 dev->freeObjects = newObjects;
1317 dev->nFreeObjects+= nObjects;
1318 dev->nObjectsCreated+= nObjects;
1320 // Now add this bunch of Objects to a list for freeing up.
1322 list = YMALLOC(sizeof(yaffs_ObjectList));
1325 T(YAFFS_TRACE_ALLOCATE,(TSTR("Could not add objects to management list" TENDSTR)));
1329 list->objects = newObjects;
1330 list->next = dev->allocatedObjectList;
1331 dev->allocatedObjectList = list;
1340 // AllocateEmptyObject gets us a clean Object. Tries to make allocate more if we run out
1341 static yaffs_Object *yaffs_AllocateEmptyObject(yaffs_Device *dev)
1343 yaffs_Object *tn = NULL;
1345 // If there are none left make more
1346 if(!dev->freeObjects)
1348 yaffs_CreateFreeObjects(dev,YAFFS_ALLOCATION_NOBJECTS);
1351 if(dev->freeObjects)
1353 tn = dev->freeObjects;
1354 dev->freeObjects = (yaffs_Object *)(dev->freeObjects->siblings.next);
1355 dev->nFreeObjects--;
1357 // Now sweeten it up...
1359 memset(tn,0,sizeof(yaffs_Object));
1362 tn->variantType = YAFFS_OBJECT_TYPE_UNKNOWN;
1363 INIT_LIST_HEAD(&(tn->hardLinks));
1364 INIT_LIST_HEAD(&(tn->hashLink));
1365 INIT_LIST_HEAD(&tn->siblings);
1367 // Add it to the lost and found directory.
1368 // NB Can't put root or lostNFound in lostNFound so
1369 // check if lostNFound exists first
1370 if(dev->lostNFoundDir)
1372 yaffs_AddObjectToDirectory(dev->lostNFoundDir,tn);
1380 static yaffs_Object *yaffs_CreateFakeDirectory(yaffs_Device *dev,int number,__u32 mode)
1383 yaffs_Object *obj = yaffs_CreateNewObject(dev,number,YAFFS_OBJECT_TYPE_DIRECTORY);
1386 obj->fake = 1; // it is fake so it has no NAND presence...
1387 obj->renameAllowed= 0; // ... and we're not allowed to rename it...
1388 obj->unlinkAllowed= 0; // ... or unlink it
1391 obj->yst_mode = mode;
1393 obj->chunkId = 0; // Not a valid chunk.
1401 static void yaffs_UnhashObject(yaffs_Object *tn)
1404 yaffs_Device *dev = tn->myDev;
1407 // If it is still linked into the bucket list, free from the list
1408 if(!list_empty(&tn->hashLink))
1410 list_del_init(&tn->hashLink);
1411 bucket = yaffs_HashFunction(tn->objectId);
1412 dev->objectBucket[bucket].count--;
1418 // FreeObject frees up a Object and puts it back on the free list
1419 static void yaffs_FreeObject(yaffs_Object *tn)
1422 yaffs_Device *dev = tn->myDev;
1427 // We're still hooked up to a cached inode.
1428 // Don't delete now, but mark for later deletion
1429 tn->deferedFree = 1;
1434 yaffs_UnhashObject(tn);
1436 // Link into the free list.
1437 tn->siblings.next = (struct list_head *)(dev->freeObjects);
1438 dev->freeObjects = tn;
1439 dev->nFreeObjects++;
1446 void yaffs_HandleDeferedFree(yaffs_Object *obj)
1448 if(obj->deferedFree)
1450 yaffs_FreeObject(obj);
1458 static void yaffs_DeinitialiseObjects(yaffs_Device *dev)
1460 // Free the list of allocated Objects
1462 yaffs_ObjectList *tmp;
1464 while( dev->allocatedObjectList)
1466 tmp = dev->allocatedObjectList->next;
1467 YFREE(dev->allocatedObjectList->objects);
1468 YFREE(dev->allocatedObjectList);
1470 dev->allocatedObjectList = tmp;
1473 dev->freeObjects = NULL;
1474 dev->nFreeObjects = 0;
1477 static void yaffs_InitialiseObjects(yaffs_Device *dev)
1481 dev->allocatedObjectList = NULL;
1482 dev->freeObjects = NULL;
1483 dev->nFreeObjects = 0;
1485 for(i = 0; i < YAFFS_NOBJECT_BUCKETS; i++)
1487 INIT_LIST_HEAD(&dev->objectBucket[i].list);
1488 dev->objectBucket[i].count = 0;
1498 int yaffs_FindNiceObjectBucket(yaffs_Device *dev)
1503 int lowest = 999999;
1506 // First let's see if we can find one that's empty.
1508 for(i = 0; i < 10 && lowest > 0; i++)
1511 x %= YAFFS_NOBJECT_BUCKETS;
1512 if(dev->objectBucket[x].count < lowest)
1514 lowest = dev->objectBucket[x].count;
1520 // If we didn't find an empty list, then try
1521 // looking a bit further for a short one
1523 for(i = 0; i < 10 && lowest > 3; i++)
1526 x %= YAFFS_NOBJECT_BUCKETS;
1527 if(dev->objectBucket[x].count < lowest)
1529 lowest = dev->objectBucket[x].count;
1538 static int yaffs_CreateNewObjectNumber(yaffs_Device *dev)
1540 int bucket = yaffs_FindNiceObjectBucket(dev);
1542 // Now find an object value that has not already been taken
1543 // by scanning the list.
1546 struct list_head *i;
1548 __u32 n = (__u32)bucket;
1550 //yaffs_CheckObjectHashSanity();
1555 n += YAFFS_NOBJECT_BUCKETS;
1556 if(1 ||dev->objectBucket[bucket].count > 0)
1558 list_for_each(i,&dev->objectBucket[bucket].list)
1560 // If there is already one in the list
1561 if(i && list_entry(i, yaffs_Object,hashLink)->objectId == n)
1569 //T(("bucket %d count %d inode %d\n",bucket,yaffs_objectBucket[bucket].count,n);
1574 void yaffs_HashObject(yaffs_Object *in)
1576 int bucket = yaffs_HashFunction(in->objectId);
1577 yaffs_Device *dev = in->myDev;
1579 if(!list_empty(&in->hashLink))
1585 list_add(&in->hashLink,&dev->objectBucket[bucket].list);
1586 dev->objectBucket[bucket].count++;
1590 yaffs_Object *yaffs_FindObjectByNumber(yaffs_Device *dev,__u32 number)
1592 int bucket = yaffs_HashFunction(number);
1593 struct list_head *i;
1596 list_for_each(i,&dev->objectBucket[bucket].list)
1598 // Look if it is in the list
1601 in = list_entry(i, yaffs_Object,hashLink);
1602 if(in->objectId == number)
1605 // Don't tell the VFS about this one if it is defered free
1620 yaffs_Object *yaffs_CreateNewObject(yaffs_Device *dev,int number,yaffs_ObjectType type)
1623 yaffs_Object *theObject;
1627 number = yaffs_CreateNewObjectNumber(dev);
1630 theObject = yaffs_AllocateEmptyObject(dev);
1634 theObject->fake = 0;
1635 theObject->renameAllowed = 1;
1636 theObject->unlinkAllowed = 1;
1637 theObject->objectId = number;
1638 yaffs_HashObject(theObject);
1639 theObject->variantType = type;
1640 #ifdef CONFIG_YAFFS_WINCE
1641 yfsd_WinFileTimeNow(theObject->win_atime);
1642 theObject->win_ctime[0] = theObject->win_mtime[0] = theObject->win_atime[0];
1643 theObject->win_ctime[1] = theObject->win_mtime[1] = theObject->win_atime[1];
1647 theObject->yst_atime = theObject->yst_mtime = theObject->yst_ctime = Y_CURRENT_TIME;
1651 case YAFFS_OBJECT_TYPE_FILE:
1652 theObject->variant.fileVariant.fileSize = 0;
1653 theObject->variant.fileVariant.scannedFileSize = 0;
1654 theObject->variant.fileVariant.shrinkSize = 0xFFFFFFFF; // max __u32
1655 theObject->variant.fileVariant.topLevel = 0;
1656 theObject->variant.fileVariant.top = yaffs_GetTnode(dev);
1658 case YAFFS_OBJECT_TYPE_DIRECTORY:
1659 INIT_LIST_HEAD(&theObject->variant.directoryVariant.children);
1661 case YAFFS_OBJECT_TYPE_SYMLINK:
1662 // No action required
1664 case YAFFS_OBJECT_TYPE_HARDLINK:
1665 // No action required
1667 case YAFFS_OBJECT_TYPE_SPECIAL:
1668 // No action required
1670 case YAFFS_OBJECT_TYPE_UNKNOWN:
1671 // todo this should not happen
1679 yaffs_Object *yaffs_FindOrCreateObjectByNumber(yaffs_Device *dev, int number,yaffs_ObjectType type)
1681 yaffs_Object *theObject = NULL;
1685 theObject = yaffs_FindObjectByNumber(dev,number);
1690 theObject = yaffs_CreateNewObject(dev,number,type);
1697 YCHAR *yaffs_CloneString(const YCHAR *str)
1699 YCHAR *newStr = NULL;
1703 newStr = YMALLOC((yaffs_strlen(str) + 1) * sizeof(YCHAR));
1704 yaffs_strcpy(newStr,str);
1712 // Mknod (create) a new object.
1713 // equivalentObject only has meaning for a hard link;
1714 // aliasString only has meaning for a sumlink.
1715 // rdev only has meaning for devices (a subset of special objects)
1716 yaffs_Object *yaffs_MknodObject( yaffs_ObjectType type,
1717 yaffs_Object *parent,
1722 yaffs_Object *equivalentObject,
1723 const YCHAR *aliasString,
1728 yaffs_Device *dev = parent->myDev;
1730 // Check if the entry exists. If it does then fail the call since we don't want a dup.
1731 if(yaffs_FindObjectByName(parent,name))
1736 in = yaffs_CreateNewObject(dev,-1,type);
1742 in->variantType = type;
1744 in->yst_mode = mode;
1746 #ifdef CONFIG_YAFFS_WINCE
1747 yfsd_WinFileTimeNow(in->win_atime);
1748 in->win_ctime[0] = in->win_mtime[0] = in->win_atime[0];
1749 in->win_ctime[1] = in->win_mtime[1] = in->win_atime[1];
1752 in->yst_atime = in->yst_mtime = in->yst_ctime = Y_CURRENT_TIME;
1754 in->yst_rdev = rdev;
1758 in->nDataChunks = 0;
1760 yaffs_SetObjectName(in,name);
1763 yaffs_AddObjectToDirectory(parent,in);
1765 in->myDev = parent->myDev;
1770 case YAFFS_OBJECT_TYPE_SYMLINK:
1771 in->variant.symLinkVariant.alias = yaffs_CloneString(aliasString);
1773 case YAFFS_OBJECT_TYPE_HARDLINK:
1774 in->variant.hardLinkVariant.equivalentObject = equivalentObject;
1775 in->variant.hardLinkVariant.equivalentObjectId = equivalentObject->objectId;
1776 list_add(&in->hardLinks,&equivalentObject->hardLinks);
1778 case YAFFS_OBJECT_TYPE_FILE: // do nothing
1779 case YAFFS_OBJECT_TYPE_DIRECTORY: // do nothing
1780 case YAFFS_OBJECT_TYPE_SPECIAL: // do nothing
1781 case YAFFS_OBJECT_TYPE_UNKNOWN:
1785 if(/*yaffs_GetNumberOfFreeChunks(dev) <= 0 || */
1786 yaffs_UpdateObjectHeader(in,name,0,0) < 0)
1788 // Could not create the object header, fail the creation
1789 yaffs_DestroyObject(in);
1798 yaffs_Object *yaffs_MknodFile(yaffs_Object *parent,const YCHAR *name, __u32 mode, __u32 uid, __u32 gid)
1800 return yaffs_MknodObject(YAFFS_OBJECT_TYPE_FILE,parent,name,mode,uid,gid,NULL,NULL,0);
1803 yaffs_Object *yaffs_MknodDirectory(yaffs_Object *parent,const YCHAR *name, __u32 mode, __u32 uid, __u32 gid)
1805 return yaffs_MknodObject(YAFFS_OBJECT_TYPE_DIRECTORY,parent,name,mode,uid,gid,NULL,NULL,0);
1808 yaffs_Object *yaffs_MknodSpecial(yaffs_Object *parent,const YCHAR *name, __u32 mode, __u32 uid, __u32 gid, __u32 rdev)
1810 return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SPECIAL,parent,name,mode,uid,gid,NULL,NULL,rdev);
1813 yaffs_Object *yaffs_MknodSymLink(yaffs_Object *parent,const YCHAR *name, __u32 mode, __u32 uid, __u32 gid,const YCHAR *alias)
1815 return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SYMLINK,parent,name,mode,uid,gid,NULL,alias,0);
1818 // NB yaffs_Link returns the object id of the equivalent object.
1819 yaffs_Object *yaffs_Link(yaffs_Object *parent, const YCHAR *name, yaffs_Object *equivalentObject)
1821 // Get the real object in case we were fed a hard link as an equivalent object
1822 equivalentObject = yaffs_GetEquivalentObject(equivalentObject);
1824 if(yaffs_MknodObject(YAFFS_OBJECT_TYPE_HARDLINK,parent,name,0,0,0,equivalentObject,NULL,0))
1826 return equivalentObject;
1836 static int yaffs_ChangeObjectName(yaffs_Object *obj, yaffs_Object *newDir, const YCHAR *newName,int force)
1843 newDir = obj->parent; // use the old directory
1846 if(newDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
1848 T(YAFFS_TRACE_ALWAYS,(TSTR("tragendy: yaffs_ChangeObjectName: newDir is not a directory"TENDSTR)));
1852 // TODO: Do we need this different handling for YAFFS2 and YAFFS1??
1853 if(obj->myDev->isYaffs2)
1855 unlinkOp = (newDir == obj->myDev->unlinkedDir);
1859 unlinkOp = (newDir == obj->myDev->unlinkedDir && obj->variantType == YAFFS_OBJECT_TYPE_FILE);
1862 deleteOp = (newDir == obj->myDev->deletedDir);
1864 // If the object is a file going into the unlinked directory, then it is OK to just stuff it in since
1865 // duplicate names are allowed.
1866 // Otherwise only proceed if the new name does not exist and if we're putting it into a directory.
1870 !yaffs_FindObjectByName(newDir,newName)) &&
1871 newDir->variantType == YAFFS_OBJECT_TYPE_DIRECTORY)
1873 yaffs_SetObjectName(obj,newName);
1876 yaffs_AddObjectToDirectory(newDir,obj);
1878 if(unlinkOp) obj->unlinked = 1;
1880 // If it is a deletion then we mark it as a shrink for gc purposes.
1881 if(yaffs_UpdateObjectHeader(obj,newName,0,deleteOp) >= 0)
1892 int yaffs_RenameObject(yaffs_Object *oldDir, const YCHAR *oldName, yaffs_Object *newDir, const YCHAR *newName)
1897 #ifdef CONFIG_YAFFS_CASE_INSENSITIVE
1898 // Special case for case insemsitive systems (eg. WinCE).
1899 // While look-up is case insensitive, the name isn't.
1900 // THerefore we might want to change x.txt to X.txt
1901 if(oldDir == newDir && yaffs_strcmp(oldName,newName) == 0)
1907 obj = yaffs_FindObjectByName(oldDir,oldName);
1908 if(obj && obj->renameAllowed)
1910 return yaffs_ChangeObjectName(obj,newDir,newName,force);
1918 static int yaffs_CheckObjectHashSanity(yaffs_Device *dev)
1920 // Scan the buckets and check that the lists
1921 // have as many members as the count says there are
1924 struct list_head *j;
1927 for(bucket = 0; bucket < YAFFS_NOBJECT_BUCKETS; bucket++)
1931 list_for_each(j,&dev->objectBucket[bucket].list)
1936 if(countEm != dev->objectBucket[bucket].count)
1938 T(YAFFS_TRACE_ERROR,(TSTR("Inode hash inconsistency" TENDSTR)));
1947 void yaffs_ObjectTest(yaffs_Device *dev)
1949 yaffs_Object *in[1000];
1951 yaffs_Object *inold[1000];
1955 memset(in,0,1000*sizeof(yaffs_Object *));
1956 memset(inold,0,1000*sizeof(yaffs_Object *));
1958 yaffs_CheckObjectHashSanity(dev);
1960 for(j = 0; j < 10; j++)
1964 for(i = 0; i < 1000; i++)
1966 in[i] = yaffs_CreateNewObject(dev,-1,YAFFS_OBJECT_TYPE_FILE);
1969 YINFO("No more inodes");
1973 inNo[i] = in[i]->objectId;
1977 for(i = 0; i < 1000; i++)
1979 if(yaffs_FindObjectByNumber(dev,inNo[i]) != in[i])
1981 //T(("Differnce in look up test\n"));
1985 // T(("Look up ok\n"));
1989 yaffs_CheckObjectHashSanity(dev);
1991 for(i = 0; i < 1000; i+=3)
1993 yaffs_FreeObject(in[i]);
1998 yaffs_CheckObjectHashSanity(dev);
2005 /////////////////////////// Block Management and Page Allocation ///////////////////
2008 static int yaffs_InitialiseBlocks(yaffs_Device *dev,int nBlocks)
2010 dev->allocationBlock = -1; // force it to get a new one
2011 //Todo we're assuming the malloc will pass.
2012 dev->blockInfo = YMALLOC(nBlocks * sizeof(yaffs_BlockInfo));
2013 // Set up dynamic blockinfo stuff.
2014 dev->chunkBitmapStride = (dev->nChunksPerBlock+7)/8;
2015 dev->chunkBits = YMALLOC(dev->chunkBitmapStride * nBlocks);
2016 if(dev->blockInfo && dev->chunkBits)
2018 memset(dev->blockInfo,0,nBlocks * sizeof(yaffs_BlockInfo));
2019 memset(dev->chunkBits,0,dev->chunkBitmapStride * nBlocks);
2027 static void yaffs_DeinitialiseBlocks(yaffs_Device *dev)
2029 YFREE(dev->blockInfo);
2030 dev->blockInfo = NULL;
2031 YFREE(dev->chunkBits);
2032 dev->chunkBits = NULL;
2036 static int yaffs_BlockNotDisqualifiedFromGC(yaffs_Device *dev, yaffs_BlockInfo *bi)
2042 if(!dev->isYaffs2) return 1; // disqualification only applies to yaffs2.
2044 if(!bi->hasShrinkHeader) return 1; // can gc
2047 // Find the oldest dirty sequence number if we don't know it and save it
2048 // so we don't have to keep recomputing it.
2049 if(!dev->oldestDirtySequence)
2051 seq = dev->sequenceNumber;
2053 for(i = dev->internalStartBlock; i <= dev->internalEndBlock; i++)
2055 b = yaffs_GetBlockInfo(dev,i);
2056 if(b->blockState == YAFFS_BLOCK_STATE_FULL &&
2057 (b->pagesInUse - b->softDeletions )< dev->nChunksPerBlock &&
2058 b->sequenceNumber < seq)
2060 seq = b->sequenceNumber;
2063 dev->oldestDirtySequence = seq;
2067 // Can't do gc of this block if there are any blocks older than this one that have
2069 return (bi->sequenceNumber <= dev->oldestDirtySequence);
2076 // FindDiretiestBlock is used to select the dirtiest block (or close enough)
2077 // for garbage collection.
2082 static int yaffs_FindBlockForGarbageCollection(yaffs_Device *dev,int aggressive)
2085 int b = dev->currentDirtyChecker;
2091 yaffs_BlockInfo *bi;
2092 static int nonAggressiveSkip = 0;
2094 // If we're doing aggressive GC then we are happy to take a less-dirty block, and
2096 // else (we're doing a leasurely gc), then we only bother to do this if the
2097 // block has only a few pages in use.
2100 nonAggressiveSkip--;
2102 if(!aggressive &&(nonAggressiveSkip > 0))
2107 pagesInUse = (aggressive)? dev->nChunksPerBlock : YAFFS_PASSIVE_GC_CHUNKS + 1;
2111 iterations = dev->internalEndBlock - dev->internalStartBlock + 1;
2115 iterations = dev->internalEndBlock - dev->internalStartBlock + 1;
2116 iterations = iterations / 16;
2117 if(iterations > 200)
2123 for(i = 0; i <= iterations && pagesInUse > 0 ; i++)
2126 if ( b < dev->internalStartBlock || b > dev->internalEndBlock)
2128 b = dev->internalStartBlock;
2131 if(b < dev->internalStartBlock || b > dev->internalEndBlock)
2133 T(YAFFS_TRACE_ERROR,(TSTR("**>> Block %d is not valid" TENDSTR),b));
2137 bi = yaffs_GetBlockInfo(dev,b);
2139 if(bi->blockState == YAFFS_BLOCK_STATE_FULL &&
2140 (bi->pagesInUse - bi->softDeletions )< pagesInUse &&
2141 yaffs_BlockNotDisqualifiedFromGC(dev,bi))
2144 pagesInUse = (bi->pagesInUse - bi->softDeletions);
2148 dev->currentDirtyChecker = b;
2152 T(YAFFS_TRACE_GC,(TSTR("GC Selected block %d with %d free" TENDSTR),dirtiest,dev->nChunksPerBlock - pagesInUse));
2155 dev->oldestDirtySequence = 0; // clear this
2159 nonAggressiveSkip = 4;
2166 static void yaffs_BlockBecameDirty(yaffs_Device *dev,int blockNo)
2168 yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev,blockNo);
2172 // If the block is still healthy erase it and mark as clean.
2173 // If the block has had a data failure, then retire it.
2174 bi->blockState = YAFFS_BLOCK_STATE_DIRTY;
2176 if(!bi->needsRetiring)
2178 erasedOk = yaffs_EraseBlockInNAND(dev,blockNo);
2181 dev->nErasureFailures++;
2182 T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,(TSTR("**>> Erasure failed %d" TENDSTR),blockNo));
2186 if(erasedOk && (yaffs_traceMask & YAFFS_TRACE_ERASE))
2189 for(i = 0; i < dev->nChunksPerBlock; i++)
2191 if(!yaffs_CheckChunkErased(dev,blockNo * dev->nChunksPerBlock + i))
2193 T(YAFFS_TRACE_ERROR,(TSTR(">>Block %d erasure supposedly OK, but chunk %d not erased" TENDSTR),blockNo,i));
2201 bi->blockState = YAFFS_BLOCK_STATE_EMPTY;
2202 dev->nErasedBlocks++;
2204 bi->softDeletions = 0;
2205 bi->hasShrinkHeader=0;
2206 yaffs_ClearChunkBits(dev,blockNo);
2208 T(YAFFS_TRACE_ERASE,(TSTR("Erased block %d" TENDSTR),blockNo));
2212 dev->nFreeChunks -= dev->nChunksPerBlock; // We lost a block of free space
2214 yaffs_RetireBlock(dev,blockNo);
2215 T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,(TSTR("**>> Block %d retired" TENDSTR),blockNo));
2220 static void yaffs_DumpBlockStats(yaffs_Device *dev)
2223 yaffs_BlockInfo *bi;
2225 for(i= dev->internalStartBlock; i <=dev->internalEndBlock; i++)
2227 bi = yaffs_GetBlockInfo(dev,i);
2228 T(YAFFS_TRACE_ALLOCATE,(TSTR("%3d state %d shrink %d inuse %d/%d seq %d pages"),i,
2229 bi->blockState,bi->hasShrinkHeader,bi->pagesInUse,bi->softDeletions,bi->sequenceNumber));
2231 for(j = 0; j < dev->nChunksPerBlock; j++)
2233 if(yaffs_CheckChunkBit(dev,i,j))
2235 T(YAFFS_TRACE_ALLOCATE,(TSTR(" %d"),j));
2239 T(YAFFS_TRACE_ALLOCATE,(TSTR(" " TENDSTR)));
2246 static int yaffs_FindBlockForAllocation(yaffs_Device *dev)
2250 yaffs_BlockInfo *bi;
2255 if(j < 0 || j > 100)
2258 yaffs_DumpBlockStats(dev);
2263 if(dev->nErasedBlocks < 1)
2265 // Hoosterman we've got a problem.
2266 // Can't get space to gc
2267 T(YAFFS_TRACE_ERROR, (TSTR("yaffs tragedy: no more eraased blocks" TENDSTR)));
2272 // Find an empty block.
2274 for(i = dev->internalStartBlock; i <= dev->internalEndBlock; i++)
2276 dev->allocationBlockFinder++;
2277 if(dev->allocationBlockFinder < dev->internalStartBlock || dev->allocationBlockFinder> dev->internalEndBlock)
2279 dev->allocationBlockFinder = dev->internalStartBlock;
2282 bi = yaffs_GetBlockInfo(dev,dev->allocationBlockFinder);
2284 if(bi->blockState == YAFFS_BLOCK_STATE_EMPTY)
2286 bi->blockState = YAFFS_BLOCK_STATE_ALLOCATING;
2287 dev->sequenceNumber++;
2288 bi->sequenceNumber = dev->sequenceNumber;
2289 dev->nErasedBlocks--;
2290 T(YAFFS_TRACE_ALLOCATE,(TSTR("Allocated block %d, seq %d, %d left" TENDSTR),dev->allocationBlockFinder,dev->sequenceNumber, dev->nErasedBlocks));
2291 return dev->allocationBlockFinder;
2296 T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs tragedy: no more eraased blocks, but there should have been %d" TENDSTR),dev->nErasedBlocks));
2306 // To determine if we have enough space we just look at the
2307 // number of erased blocks.
2309 static int yaffs_CheckSpaceForAllocation(yaffs_Device *dev)
2311 int reservedChunks = (dev->nReservedBlocks * dev->nChunksPerBlock);
2312 return (dev->nFreeChunks > reservedChunks);
2316 static int yaffs_AllocateChunk(yaffs_Device *dev,int useReserve)
2319 yaffs_BlockInfo *bi;
2321 if(dev->allocationBlock < 0)
2323 // Get next block to allocate off
2324 dev->allocationBlock = yaffs_FindBlockForAllocation(dev);
2325 dev->allocationPage = 0;
2328 if(!useReserve && !yaffs_CheckSpaceForAllocation(dev))
2330 // Not enough space to allocate unless we're allowed to use the reserve.
2334 if(dev->nErasedBlocks < dev->nReservedBlocks && dev->allocationPage == 0)
2336 T(YAFFS_TRACE_ALLOCATE,(TSTR("Allocating reserve" TENDSTR)));
2340 // Next page please....
2341 if(dev->allocationBlock >= 0)
2343 bi = yaffs_GetBlockInfo(dev,dev->allocationBlock);
2345 retVal = (dev->allocationBlock * dev->nChunksPerBlock) +
2346 dev->allocationPage;
2348 yaffs_SetChunkBit(dev,dev->allocationBlock,dev->allocationPage);
2350 dev->allocationPage++;
2354 // If the block is full set the state to full
2355 if(dev->allocationPage >= dev->nChunksPerBlock)
2357 bi->blockState = YAFFS_BLOCK_STATE_FULL;
2358 dev->allocationBlock = -1;
2365 T(YAFFS_TRACE_ERROR,(TSTR("!!!!!!!!! Allocator out !!!!!!!!!!!!!!!!!" TENDSTR)));
2373 static int yaffs_GetErasedChunks(yaffs_Device *dev)
2377 n = dev->nErasedBlocks * dev->nChunksPerBlock;
2379 if(dev->allocationBlock> 0)
2381 n += (dev->nChunksPerBlock - dev->allocationPage);
2388 int yaffs_GarbageCollectBlock(yaffs_Device *dev,int block)
2394 int retVal = YAFFS_OK;
2398 int chunksBefore = yaffs_GetErasedChunks(dev);
2401 yaffs_ExtendedTags tags;
2403 yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev,block);
2405 yaffs_Object *object;
2407 bi->blockState = YAFFS_BLOCK_STATE_COLLECTING;
2409 T(YAFFS_TRACE_TRACING,(TSTR("Collecting block %d, in use %d, shrink %d, " TENDSTR),block,bi->pagesInUse,bi->hasShrinkHeader));
2410 //T(("Collecting block %d n %d bits %x\n",block, bi->pagesInUse, bi->pageBits));
2412 //yaffs_VerifyFreeChunks(dev);
2414 bi->hasShrinkHeader = 0; // clear the flag so that the block can erase
2416 dev->nFreeChunks -= bi->softDeletions; // Take off the number of soft deleted entries because
2417 // they're going to get really deleted during GC.
2421 if(!yaffs_StillSomeChunkBits(dev,block))
2423 T(YAFFS_TRACE_TRACING,(TSTR("Collecting block %d that has no chunks in use" TENDSTR),block));
2424 yaffs_BlockBecameDirty(dev,block);
2429 __u8 *buffer = yaffs_GetTempBuffer(dev,__LINE__);
2431 for(chunkInBlock = 0,oldChunk = block * dev->nChunksPerBlock;
2432 chunkInBlock < dev->nChunksPerBlock && yaffs_StillSomeChunkBits(dev,block);
2433 chunkInBlock++, oldChunk++ )
2435 if(yaffs_CheckChunkBit(dev,block,chunkInBlock))
2438 // This page is in use and might need to be copied off
2442 //T(("copying page %x from %d to %d\n",mask,oldChunk,newChunk));
2444 yaffs_InitialiseTags(&tags);
2446 yaffs_ReadChunkWithTagsFromNAND(dev,oldChunk,buffer, &tags);
2448 object = yaffs_FindObjectByNumber(dev,tags.objectId);
2450 T(YAFFS_TRACE_GC_DETAIL,(TSTR("Collecting page %d, %d %d %d " TENDSTR),chunkInBlock,tags.objectId,tags.chunkId,tags.byteCount));
2454 T(YAFFS_TRACE_ERROR,(TSTR("page %d in gc has no object " TENDSTR),oldChunk));
2457 if(object && object->deleted && tags.chunkId != 0)
2459 // Data chunk in a deleted file, throw it away
2460 // It's a soft deleted data chunk,
2461 // No need to copy this, just forget about it and fix up the
2464 //yaffs_PutChunkIntoFile(object, tags.chunkId, 0,0);
2465 object->nDataChunks--;
2467 if(object->nDataChunks <= 0)
2469 // remeber to clean up the object
2470 dev->gcCleanupList[cleanups] = tags.objectId;
2475 else if( 0 /* Todo object && object->deleted && object->nDataChunks == 0 */)
2477 // Deleted object header with no data chunks.
2478 // Can be discarded and the file deleted.
2479 object->chunkId = 0;
2480 yaffs_FreeTnode(object->myDev,object->variant.fileVariant.top);
2481 object->variant.fileVariant.top = NULL;
2482 yaffs_DoGenericObjectDeletion(object);
2487 // It's either a data chunk in a live file or
2488 // an ObjectHeader, so we're interested in it.
2489 // NB Need to keep the ObjectHeaders of deleted files
2490 // until the whole file has been deleted off
2491 tags.serialNumber++;
2495 newChunk = yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &tags,1);
2499 retVal = YAFFS_FAIL;
2504 // Ok, now fix up the Tnodes etc.
2506 if(tags.chunkId == 0)
2509 object->chunkId = newChunk;
2510 object->serial = tags.serialNumber;
2514 // It's a data chunk
2515 yaffs_PutChunkIntoFile(object, tags.chunkId, newChunk,0);
2520 yaffs_DeleteChunk(dev,oldChunk,markNAND,__LINE__);
2525 yaffs_ReleaseTempBuffer(dev,buffer,__LINE__);
2527 //yaffs_VerifyFreeChunks(dev);
2529 // Do any required cleanups
2530 for(i = 0; i < cleanups; i++)
2532 // Time to delete the file too
2533 object = yaffs_FindObjectByNumber(dev,dev->gcCleanupList[i]);
2536 yaffs_FreeTnode(dev,object->variant.fileVariant.top);
2537 object->variant.fileVariant.top = NULL;
2538 T(YAFFS_TRACE_GC,(TSTR("yaffs: About to finally delete object %d" TENDSTR),object->objectId));
2539 yaffs_DoGenericObjectDeletion(object);
2546 if(chunksBefore >= (chunksAfter = yaffs_GetErasedChunks(dev)))
2548 T(YAFFS_TRACE_GC,(TSTR("gc did not increase free chunks before %d after %d" TENDSTR),chunksBefore,chunksAfter));
2554 //yaffs_VerifyFreeChunks(dev);
2560 static yaffs_Object *yaffs_FindDeletedUnlinkedFile(yaffs_Device *dev)
2562 // find a file to delete
2563 struct list_head *i;
2567 //Scan the unlinked files looking for one to delete
2568 list_for_each(i,&dev->unlinkedDir->variant.directoryVariant.children)
2572 l = list_entry(i, yaffs_Object,siblings);
2583 static void yaffs_DoUnlinkedFileDeletion(yaffs_Device *dev)
2585 // This does background deletion on unlinked files.. only deleted ones.
2586 // If we don't have a file we're working on then find one
2587 if(!dev->unlinkedDeletion && dev->nDeletedFiles > 0)
2589 dev->unlinkedDeletion = yaffs_FindDeletedUnlinkedFile(dev);
2592 // OK, we're working on a file...
2593 if(dev->unlinkedDeletion)
2595 yaffs_Object *obj = dev->unlinkedDeletion;
2597 int limit; // Number of chunks to delete in a file.
2598 // NB this can be exceeded, but not by much.
2602 delresult = yaffs_DeleteWorker(obj, obj->variant.fileVariant.top, obj->variant.fileVariant.topLevel, 0,&limit);
2604 if(obj->nDataChunks == 0)
2606 // Done all the deleting of data chunks.
2607 // Now dump the header and clean up
2608 yaffs_FreeTnode(dev,obj->variant.fileVariant.top);
2609 obj->variant.fileVariant.top = NULL;
2610 yaffs_DoGenericObjectDeletion(obj);
2611 dev->nDeletedFiles--;
2612 dev->nUnlinkedFiles--;
2613 dev->nBackgroundDeletions++;
2614 dev->unlinkedDeletion = NULL;
2623 // New garbage collector
2624 // If we're very low on erased blocks then we do aggressive garbage collection
2625 // otherwise we do "leasurely" garbage collection.
2626 // Aggressive gc looks further (whole array) and will accept dirtier blocks.
2627 // Passive gc only inspects smaller areas and will only accept cleaner blocks.
2629 // The idea is to help clear out space in a more spread-out manner.
2630 // Dunno if it really does anything useful.
2632 int yaffs_CheckGarbageCollection(yaffs_Device *dev)
2636 int gcOk = YAFFS_OK;
2639 //yaffs_VerifyFreeChunks(dev);
2643 // Bail out so we don't get recursive gc
2647 // This loop should pass the first time.
2648 // We'll only see looping here if the erase of the collected block fails.
2652 if(dev->nErasedBlocks < dev->nReservedBlocks)
2654 // We need a block soon...
2659 // We're in no hurry
2663 block = yaffs_FindBlockForGarbageCollection(dev,aggressive);
2667 dev->garbageCollections++;
2670 dev->passiveGarbageCollections++;
2673 T(YAFFS_TRACE_GC,(TSTR("yaffs: GC erasedBlocks %d aggressive %d" TENDSTR),dev->nErasedBlocks,aggressive));
2675 gcOk = yaffs_GarbageCollectBlock(dev,block);
2678 if(dev->nErasedBlocks < (dev->nReservedBlocks) && block > 0)
2680 T(YAFFS_TRACE_GC,(TSTR("yaffs: GC !!!no reclaim!!! erasedBlocks %d after try %d block %d" TENDSTR),dev->nErasedBlocks,maxTries,block));
2682 } while((dev->nErasedBlocks < dev->nReservedBlocks) && (block > 0) && (maxTries < 2));
2684 return aggressive ? gcOk: YAFFS_OK;
2688 //////////////////////////// TAGS ///////////////////////////////////////
2694 void yaffs_CalcTagsECC(yaffs_Tags *tags)
2698 unsigned char *b = ((yaffs_TagsUnion *)tags)->asBytes;
2705 for(i = 0; i < 8; i++)
2707 for(j = 1; j &0xff; j<<=1)
2722 int yaffs_CheckECCOnTags(yaffs_Tags *tags)
2724 unsigned ecc = tags->ecc;
2726 yaffs_CalcTagsECC(tags);
2730 if(ecc && ecc <= 64)
2732 // TODO: Handle the failure better. Retire?
2733 unsigned char *b = ((yaffs_TagsUnion *)tags)->asBytes;
2737 b[ecc / 8] ^= (1 << (ecc & 7));
2739 // Now recvalc the ecc
2740 yaffs_CalcTagsECC(tags);
2742 return 1; // recovered error
2746 // Wierd ecc failure value
2747 // TODO Need to do somethiong here
2748 return -1; //unrecovered error
2754 static void yaffs_LoadTagsIntoSpare(yaffs_Spare *sparePtr, yaffs_Tags *tagsPtr)
2756 yaffs_TagsUnion *tu = (yaffs_TagsUnion *)tagsPtr;
2758 yaffs_CalcTagsECC(tagsPtr);
2760 sparePtr->tagByte0 = tu->asBytes[0];
2761 sparePtr->tagByte1 = tu->asBytes[1];
2762 sparePtr->tagByte2 = tu->asBytes[2];
2763 sparePtr->tagByte3 = tu->asBytes[3];
2764 sparePtr->tagByte4 = tu->asBytes[4];
2765 sparePtr->tagByte5 = tu->asBytes[5];
2766 sparePtr->tagByte6 = tu->asBytes[6];
2767 sparePtr->tagByte7 = tu->asBytes[7];
2770 static void yaffs_GetTagsFromSpare(yaffs_Device *dev, yaffs_Spare *sparePtr,yaffs_Tags *tagsPtr)
2772 yaffs_TagsUnion *tu = (yaffs_TagsUnion *)tagsPtr;
2775 tu->asBytes[0]= sparePtr->tagByte0;
2776 tu->asBytes[1]= sparePtr->tagByte1;
2777 tu->asBytes[2]= sparePtr->tagByte2;
2778 tu->asBytes[3]= sparePtr->tagByte3;
2779 tu->asBytes[4]= sparePtr->tagByte4;
2780 tu->asBytes[5]= sparePtr->tagByte5;
2781 tu->asBytes[6]= sparePtr->tagByte6;
2782 tu->asBytes[7]= sparePtr->tagByte7;
2784 result = yaffs_CheckECCOnTags(tagsPtr);
2787 dev->tagsEccFixed++;
2791 dev->tagsEccUnfixed++;
2795 static void yaffs_SpareInitialise(yaffs_Spare *spare)
2797 memset(spare,0xFF,sizeof(yaffs_Spare));
2803 static int yaffs_WriteNewChunkWithTagsToNAND(yaffs_Device *dev, const __u8 *buffer, yaffs_ExtendedTags *tags, int useReserve)
2805 // NB There must be tags, data is optional
2806 // If there is data, then an ECC is calculated on it.
2815 //yaffs_SpareInitialise(&spare);
2817 //if(!dev->useNANDECC && buffer)
2819 // yaffs_CalcECC(buffer,&spare);
2822 //yaffs_LoadTagsIntoSpare(&spare,tags);
2824 return yaffs_WriteNewChunkToNAND(dev,buffer,&spare,useReserve);
2829 static int yaffs_TagsMatch(const yaffs_ExtendedTags *tags, int objectId, int chunkInObject)
2831 return ( tags->chunkId == chunkInObject &&
2832 tags->objectId == objectId &&
2833 !tags->chunkDeleted) ? 1 : 0;
2837 /////////////////////////////////////////////////////////////////////////////////////////////////////////
2840 int yaffs_FindChunkInFile(yaffs_Object *in,int chunkInInode,yaffs_ExtendedTags *tags)
2842 //Get the Tnode, then get the level 0 offset chunk offset
2845 yaffs_ExtendedTags localTags;
2848 yaffs_Device *dev = in->myDev;
2853 // Passed a NULL, so use our own tags space
2857 tn = yaffs_FindLevel0Tnode(dev,&in->variant.fileVariant, chunkInInode);
2861 theChunk = tn->level0[chunkInInode & YAFFS_TNODES_LEVEL0_MASK] << dev->chunkGroupBits;
2863 retVal = yaffs_FindChunkInGroup(dev,theChunk,tags,in->objectId,chunkInInode);
2868 int yaffs_FindAndDeleteChunkInFile(yaffs_Object *in,int chunkInInode,yaffs_ExtendedTags *tags)
2870 //Get the Tnode, then get the level 0 offset chunk offset
2873 yaffs_ExtendedTags localTags;
2875 yaffs_Device *dev = in->myDev;
2880 // Passed a NULL, so use our own tags space
2884 tn = yaffs_FindLevel0Tnode(dev,&in->variant.fileVariant, chunkInInode);
2889 theChunk = tn->level0[chunkInInode & YAFFS_TNODES_LEVEL0_MASK] << dev->chunkGroupBits;
2891 retVal = yaffs_FindChunkInGroup(dev,theChunk,tags,in->objectId,chunkInInode);
2893 // Delete the entry in the filestructure (if found)
2896 tn->level0[chunkInInode & YAFFS_TNODES_LEVEL0_MASK] = 0;
2901 //T(("No level 0 found for %d\n", chunkInInode));
2906 //T(("Could not find %d to delete\n",chunkInInode));
2912 #ifdef YAFFS_PARANOID
2914 static int yaffs_CheckFileSanity(yaffs_Object *in)
2922 yaffs_Tags localTags;
2923 yaffs_Tags *tags = &localTags;
2928 if(in->variantType != YAFFS_OBJECT_TYPE_FILE)
2930 //T(("Object not a file\n"));
2934 objId = in->objectId;
2935 fSize = in->variant.fileVariant.fileSize;
2936 nChunks = (fSize + in->myDev->nBytesPerChunk -1)/in->myDev->nBytesPerChunk;
2938 for(chunk = 1; chunk <= nChunks; chunk++)
2940 tn = yaffs_FindLevel0Tnode(in->myDev,&in->variant.fileVariant, chunk);
2945 theChunk = tn->level0[chunk & YAFFS_TNODES_LEVEL0_MASK] << in->myDev->chunkGroupBits;
2947 if(yaffs_CheckChunkBits(dev,theChunk/dev->nChunksPerBlock,theChunk%dev->nChunksPerBlock))
2951 yaffs_ReadChunkTagsFromNAND(in->myDev,theChunk,tags,&chunkDeleted);
2952 if(yaffs_TagsMatch(tags,in->objectId,chunk,chunkDeleted))
2960 //T(("File problem file [%d,%d] NAND %d tags[%d,%d]\n",
2961 // objId,chunk,theChunk,tags->chunkId,tags->objectId);
2970 //T(("No level 0 found for %d\n", chunk));
2974 return failed ? YAFFS_FAIL : YAFFS_OK;
2979 static int yaffs_PutChunkIntoFile(yaffs_Object *in,int chunkInInode, int chunkInNAND, int inScan)
2981 // NB inScan is zero unless scanning. For forward scanning, inScan is > 0; for backward scanning inScan is < 0
2983 yaffs_Device *dev = in->myDev;
2985 yaffs_ExtendedTags existingTags;
2986 yaffs_ExtendedTags newTags;
2987 unsigned existingSerial, newSerial;
2989 if(in->variantType != YAFFS_OBJECT_TYPE_FILE)
2991 // Just ignore an attempt at putting a chunk into a non-file during scanning
2992 // If it is not during Scanning then something went wrong!
2995 T(YAFFS_TRACE_ERROR, (TSTR("yaffs tragedy:attempt to put data chunk into a non-file" TENDSTR)));
2999 yaffs_DeleteChunk(dev,chunkInNAND,1,__LINE__);
3003 tn = yaffs_AddOrFindLevel0Tnode(dev,&in->variant.fileVariant, chunkInInode);
3009 existingChunk = tn->level0[chunkInInode & YAFFS_TNODES_LEVEL0_MASK];
3013 // If we're scanning then we need to test for duplicates
3014 // NB This does not need to be efficient since it should only ever
3015 // happen when the power fails during a write, then only one
3016 // chunk should ever be affected.
3018 // Correction for YAFFS2: This could happen quite a lot and we need to think about efficiency! TODO
3019 // Update: For backward scanning we don't need to re-read tags so this is quite cheap.
3023 if(existingChunk != 0)
3025 // NB Right now existing chunk will not be real chunkId if the device >= 32MB
3026 // thus we have to do a FindChunkInFile to get the real chunk id.
3028 // We have a duplicate now we need to decide which one to use:
3030 // Backwards scanning YAFFS2: The old one is what we use, dump the new one.
3031 // Forward scanning YAFFS2: The new one is what we use, dump the old one.
3032 // YAFFS1: Get both sets of tags and compare serial numbers.
3038 // Only do this for forward scanning
3039 yaffs_ReadChunkWithTagsFromNAND(dev,chunkInNAND, NULL,&newTags);
3043 existingChunk = yaffs_FindChunkInFile(in,chunkInInode, &existingTags);
3046 if(existingChunk <=0)
3048 //Hoosterman - how did this happen?
3050 T(YAFFS_TRACE_ERROR, (TSTR("yaffs tragedy: existing chunk < 0 in scan" TENDSTR)));
3055 // NB The deleted flags should be false, otherwise the chunks will
3056 // not be loaded during a scan
3058 newSerial = newTags.serialNumber;
3059 existingSerial = existingTags.serialNumber;
3062 ( in->myDev->isYaffs2 ||
3063 existingChunk <= 0 ||
3064 ((existingSerial+1) & 3) == newSerial))
3066 // Forward scanning.
3068 // Delete the old one and drop through to update the tnode
3069 yaffs_DeleteChunk(dev,existingChunk,1,__LINE__);
3073 // Backward scanning or we want to use the existing one
3075 // Delete the new one and return early so that the tnode isn't changed
3076 yaffs_DeleteChunk(dev,chunkInNAND,1,__LINE__);
3083 if(existingChunk == 0)
3088 tn->level0[chunkInInode & YAFFS_TNODES_LEVEL0_MASK] = (chunkInNAND >> dev->chunkGroupBits);
3095 int yaffs_ReadChunkDataFromObject(yaffs_Object *in,int chunkInInode, __u8 *buffer)
3097 int chunkInNAND = yaffs_FindChunkInFile(in,chunkInInode,NULL);
3099 if(chunkInNAND >= 0)
3101 return yaffs_ReadChunkWithTagsFromNAND(in->myDev,chunkInNAND,buffer,NULL);
3105 T(YAFFS_TRACE_NANDACCESS,(TSTR("Chunk %d not found zero instead" TENDSTR),chunkInNAND));
3107 memset(buffer,0,in->myDev->nBytesPerChunk); // get sane data if you read a hole
3114 void yaffs_DeleteChunk(yaffs_Device *dev,int chunkId,int markNAND,int lyn)
3118 yaffs_ExtendedTags tags;
3119 yaffs_BlockInfo *bi;
3121 if(chunkId <= 0) return;
3124 block = chunkId / dev->nChunksPerBlock;
3125 page = chunkId % dev->nChunksPerBlock;
3127 bi = yaffs_GetBlockInfo(dev,block);
3129 T(YAFFS_TRACE_DELETION,(TSTR("line %d delete of chunk %d" TENDSTR),lyn,chunkId));
3132 bi->blockState != YAFFS_BLOCK_STATE_COLLECTING &&
3135 // yaffs_SpareInitialise(&spare);
3137 #ifdef CONFIG_MTD_NAND_VERIFY_WRITE
3139 //read data before write, to ensure correct ecc
3140 //if we're using MTD verification under Linux
3141 yaffs_ReadChunkFromNAND(dev,chunkId,NULL,&spare,0);
3144 yaffs_InitialiseTags(&tags);
3146 tags.chunkDeleted = 1;
3149 yaffs_WriteChunkWithTagsToNAND(dev,chunkId,NULL,&tags);
3150 yaffs_HandleUpdateChunk(dev,chunkId,&tags);
3154 dev->nUnmarkedDeletions++;
3158 // Pull out of the management area.
3159 // If the whole block became dirty, this will kick off an erasure.
3160 if( bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING ||
3161 bi->blockState == YAFFS_BLOCK_STATE_FULL ||
3162 bi->blockState == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
3163 bi->blockState == YAFFS_BLOCK_STATE_COLLECTING)
3167 yaffs_ClearChunkBit(dev,block,page);
3171 if(bi->pagesInUse == 0 &&
3172 !bi->hasShrinkHeader &&
3173 bi->blockState != YAFFS_BLOCK_STATE_ALLOCATING &&
3174 bi->blockState != YAFFS_BLOCK_STATE_NEEDS_SCANNING)
3176 yaffs_BlockBecameDirty(dev,block);
3182 // T(("Bad news deleting chunk %d\n",chunkId));
3190 int yaffs_WriteChunkDataToObject(yaffs_Object *in,int chunkInInode, const __u8 *buffer,int nBytes,int useReserve)
3192 // Find old chunk Need to do this to get serial number
3193 // Write new one and patch into tree.
3194 // Invalidate old tags.
3197 yaffs_ExtendedTags prevTags;
3200 yaffs_ExtendedTags newTags;
3202 yaffs_Device *dev = in->myDev;
3204 yaffs_CheckGarbageCollection(dev);
3206 // Get the previous chunk at this location in the file if it exists
3207 prevChunkId = yaffs_FindChunkInFile(in,chunkInInode,&prevTags);
3210 yaffs_InitialiseTags(&newTags);
3212 newTags.chunkId = chunkInInode;
3213 newTags.objectId = in->objectId;
3214 newTags.serialNumber = (prevChunkId >= 0) ? prevTags.serialNumber + 1 : 1;
3215 newTags.byteCount = nBytes;
3217 // yaffs_CalcTagsECC(&newTags);
3219 newChunkId = yaffs_WriteNewChunkWithTagsToNAND(dev,buffer,&newTags,useReserve);
3223 yaffs_PutChunkIntoFile(in,chunkInInode,newChunkId,0);
3226 if(prevChunkId >= 0)
3228 yaffs_DeleteChunk(dev,prevChunkId,1,__LINE__);
3232 yaffs_CheckFileSanity(in);
3243 // UpdateObjectHeader updates the header on NAND for an object.
3244 // If name is not NULL, then that new name is used.
3246 int yaffs_UpdateObjectHeader(yaffs_Object *in,const YCHAR *name, int force,int isShrink)
3249 yaffs_BlockInfo *bi;
3251 yaffs_Device *dev = in->myDev;
3257 yaffs_ExtendedTags newTags;
3259 __u8 *buffer = NULL;
3260 YCHAR oldName[YAFFS_MAX_NAME_LENGTH+1];
3262 // __u8 bufferOld[YAFFS_BYTES_PER_CHUNK];
3264 yaffs_ObjectHeader *oh = NULL;
3265 // yaffs_ObjectHeader *ohOld = (yaffs_ObjectHeader *)bufferOld;
3268 if(!in->fake || force)
3271 yaffs_CheckGarbageCollection(dev);
3273 buffer = yaffs_GetTempBuffer(in->myDev,__LINE__);
3274 oh = (yaffs_ObjectHeader *)buffer;
3276 prevChunkId = in->chunkId;
3278 if(prevChunkId >= 0)
3280 yaffs_ReadChunkWithTagsFromNAND(dev,prevChunkId,buffer,NULL);
3281 memcpy(oldName,oh->name,sizeof(oh->name));
3284 memset(buffer,0xFF,dev->nBytesPerChunk);
3287 oh->type = in->variantType;
3289 oh->yst_mode = in->yst_mode;
3291 #ifdef CONFIG_YAFFS_WINCE
3292 oh->win_atime[0] = in->win_atime[0];
3293 oh->win_ctime[0] = in->win_ctime[0];
3294 oh->win_mtime[0] = in->win_mtime[0];
3295 oh->win_atime[1] = in->win_atime[1];
3296 oh->win_ctime[1] = in->win_ctime[1];
3297 oh->win_mtime[1] = in->win_mtime[1];
3299 oh->yst_uid = in->yst_uid;
3300 oh->yst_gid = in->yst_gid;
3301 oh->yst_atime = in->yst_atime;
3302 oh->yst_mtime = in->yst_mtime;
3303 oh->yst_ctime = in->yst_ctime;
3304 oh->yst_rdev = in->yst_rdev;
3308 oh->parentObjectId = in->parent->objectId;
3312 oh->parentObjectId = 0;
3315 //oh->sum = in->sum;
3318 memset(oh->name,0,sizeof(oh->name));
3319 yaffs_strncpy(oh->name,name,YAFFS_MAX_NAME_LENGTH);
3321 else if(prevChunkId)
3323 memcpy(oh->name, oldName,sizeof(oh->name));
3327 memset(oh->name,0,sizeof(oh->name));
3330 oh->isShrink = isShrink;
3332 switch(in->variantType)
3334 case YAFFS_OBJECT_TYPE_UNKNOWN:
3335 // Should not happen
3337 case YAFFS_OBJECT_TYPE_FILE:
3338 oh->fileSize = (oh->parentObjectId == YAFFS_OBJECTID_DELETED ||
3339 oh->parentObjectId == YAFFS_OBJECTID_UNLINKED) ? 0 : in->variant.fileVariant.fileSize;
3341 case YAFFS_OBJECT_TYPE_HARDLINK:
3342 oh->equivalentObjectId = in->variant.hardLinkVariant.equivalentObjectId;
3344 case YAFFS_OBJECT_TYPE_SPECIAL:
3347 case YAFFS_OBJECT_TYPE_DIRECTORY:
3350 case YAFFS_OBJECT_TYPE_SYMLINK:
3351 yaffs_strncpy(oh->alias,in->variant.symLinkVariant.alias,YAFFS_MAX_ALIAS_LENGTH);
3352 oh->alias[YAFFS_MAX_ALIAS_LENGTH] = 0;
3357 yaffs_InitialiseTags(&newTags);
3359 newTags.chunkId = 0;
3360 newTags.objectId = in->objectId;
3361 newTags.serialNumber = in->serial;
3363 // Add extra info for file header
3365 newTags.extraHeaderInfoAvailable = 1;
3366 newTags.extraParentObjectId = oh->parentObjectId;
3367 newTags.extraFileLength = oh->fileSize;
3368 newTags.extraIsShrinkHeader = oh->isShrink;
3369 newTags.extraEquivalentObjectId = oh->equivalentObjectId;
3370 newTags.extraObjectType = in->variantType;
3372 // Create new chunk in NAND
3373 newChunkId = yaffs_WriteNewChunkWithTagsToNAND(dev,buffer,&newTags, (prevChunkId >= 0) ? 1 : 0 );
3378 in->chunkId = newChunkId;
3380 if(prevChunkId >= 0)
3382 yaffs_DeleteChunk(dev,prevChunkId,1,__LINE__);
3387 // If this was a shrink, then mark the block that the chunk lives on
3390 bi = yaffs_GetBlockInfo(in->myDev,newChunkId / in->myDev->nChunksPerBlock);
3391 bi->hasShrinkHeader = 1;
3396 retVal = newChunkId;
3401 yaffs_ReleaseTempBuffer(dev,buffer,__LINE__);
3407 /////////////////////// Short Operations Cache ////////////////////////////////
3408 // In many siturations where there is no high level buffering (eg WinCE) a lot of
3409 // reads might be short sequential reads, and a lot of writes may be short
3410 // sequential writes. eg. scanning/writing a jpeg file.
3411 // In these cases, a short read/write cache can provide a huge perfomance benefit
3412 // with dumb-as-a-rock code.
3413 // There are a limited number (~10) of cache chunks per device so that we don't
3414 // need a very intelligent search.
3420 static void yaffs_FlushFilesChunkCache(yaffs_Object *obj)
3422 yaffs_Device *dev = obj->myDev;
3423 int lowest = -99; // Stop compiler whining.
3425 yaffs_ChunkCache *cache;
3426 int chunkWritten = 0;
3428 int nCaches = obj->myDev->nShortOpCaches;
3435 // Find the dirty cache for this object with the lowest chunk id.
3436 for(i = 0; i < nCaches; i++)
3438 if(dev->srCache[i].object == obj &&
3439 dev->srCache[i].dirty)
3441 if(!cache || dev->srCache[i].chunkId < lowest)
3443 cache = &dev->srCache[i];
3444 lowest = cache->chunkId;
3449 if(cache && !cache->locked)
3451 //Write it out and free it up
3454 nBytes = cache->object->variant.fileVariant.fileSize - ((cache->chunkId -1) * YAFFS_BYTES_PER_CHUNK);
3456 if(nBytes > YAFFS_BYTES_PER_CHUNK)
3458 nBytes= YAFFS_BYTES_PER_CHUNK;
3461 chunkWritten = yaffs_WriteChunkDataToObject(cache->object,
3467 cache->object = NULL;
3470 } while(cache && chunkWritten > 0);
3474 //Hoosterman, disk full while writing cache out.
3475 T(YAFFS_TRACE_ERROR, (TSTR("yaffs tragedy: no space during cache write" TENDSTR)));
3483 // Grab us a chunk for use.
3484 // First look for an empty one.
3485 // Then look for the least recently used non-dirty one.
3486 // Then look for the least recently used dirty one...., flush and look again.
3487 static yaffs_ChunkCache *yaffs_GrabChunkCacheWorker(yaffs_Device *dev)
3493 if(dev->nShortOpCaches > 0)
3495 for(i = 0; i < dev->nShortOpCaches; i++)
3497 if(!dev->srCache[i].object)
3499 //T(("Grabbing empty %d\n",i));
3501 //printf("Grabbing empty %d\n",i);
3503 return &dev->srCache[i];
3510 usage = 0; // just to stop the compiler grizzling
3512 for(i = 0; i < dev->nShortOpCaches; i++)
3514 if(!dev->srCache[i].dirty &&
3515 ((dev->srCache[i].lastUse < usage && theOne >= 0)||
3518 usage = dev->srCache[i].lastUse;
3523 //T(("Grabbing non-empty %d\n",theOne));
3525 //if(theOne >= 0) printf("Grabbed non-empty cache %d\n",theOne);
3527 return theOne >= 0 ? &dev->srCache[theOne] : NULL;
3537 static yaffs_ChunkCache *yaffs_GrabChunkCache(yaffs_Device *dev)
3539 yaffs_ChunkCache *cache;
3540 yaffs_Object *theObj;
3545 if(dev->nShortOpCaches > 0)
3547 // Try find a non-dirty one...
3549 cache = yaffs_GrabChunkCacheWorker(dev);
3553 // They were all dirty, find the last recently used object and flush
3554 // its cache, then find again.
3555 // NB what's here is not very accurate, we actually flush the object
3556 // the last recently used page.
3558 // With locking we can't assume we can use entry zero
3566 for(i = 0; i < dev->nShortOpCaches; i++)
3568 if( dev->srCache[i].object &&
3569 !dev->srCache[i].locked &&
3570 (dev->srCache[i].lastUse < usage || !cache))
3572 usage = dev->srCache[i].lastUse;
3573 theObj = dev->srCache[i].object;
3574 cache = &dev->srCache[i];
3579 if(!cache || cache->dirty)
3583 yaffs_FlushFilesChunkCache(theObj);
3586 cache = yaffs_GrabChunkCacheWorker(dev);
3590 //printf(" pushout %d\n",pushout);
3602 // Find a cached chunk
3603 static yaffs_ChunkCache *yaffs_FindChunkCache(const yaffs_Object *obj, int chunkId)
3605 yaffs_Device *dev = obj->myDev;
3607 if(dev->nShortOpCaches > 0)
3609 for(i = 0; i < dev->nShortOpCaches; i++)
3611 if(dev->srCache[i].object == obj &&
3612 dev->srCache[i].chunkId == chunkId)
3616 return &dev->srCache[i];
3623 // Mark the chunk for the least recently used algorithym
3624 static void yaffs_UseChunkCache(yaffs_Device *dev, yaffs_ChunkCache *cache, int isAWrite)
3627 if(dev->nShortOpCaches > 0)
3629 if( dev->srLastUse < 0 ||
3630 dev->srLastUse > 100000000)
3632 // Reset the cache usages
3634 for(i = 1; i < dev->nShortOpCaches; i++)
3636 dev->srCache[i].lastUse = 0;
3643 cache->lastUse = dev->srLastUse;
3652 // Invalidate a single cache page.
3653 // Do this when a whole page gets written,
3654 // ie the short cache for this page is no longer valid.
3655 static void yaffs_InvalidateChunkCache(yaffs_Object *object, int chunkId)
3657 if(object->myDev->nShortOpCaches > 0)
3659 yaffs_ChunkCache *cache = yaffs_FindChunkCache(object,chunkId);
3663 cache->object = NULL;
3669 // Invalidate all the cache pages associated with this object
3670 // Do this whenever ther file is deleted or resized.
3671 static void yaffs_InvalidateWholeChunkCache(yaffs_Object *in)
3674 yaffs_Device *dev = in->myDev;
3676 if(dev->nShortOpCaches > 0)
3678 // Now invalidate it.
3679 for(i = 0; i < dev->nShortOpCaches; i++)
3681 if(dev->srCache[i].object == in)
3683 dev->srCache[i].object = NULL;
3693 ///////////////////////// File read/write ///////////////////////////////
3694 // Read and write have very similar structures.
3695 // In general the read/write has three parts to it
3696 // * An incomplete chunk to start with (if the read/write is not chunk-aligned)
3697 // * Some complete chunks
3698 // * An incomplete chunk to end off with
3700 // Curve-balls: the first chunk might also be the last chunk.
3702 int yaffs_ReadDataFromFile(yaffs_Object *in, __u8 * buffer, __u32 offset, int nBytes)
3711 yaffs_ChunkCache *cache;
3719 chunk = offset / dev->nBytesPerChunk + 1; // The first chunk is 1
3720 start = offset % dev->nBytesPerChunk;
3722 // OK now check for the curveball where the start and end are in
3724 if( (start + n) < dev->nBytesPerChunk)
3730 nToCopy = dev->nBytesPerChunk - start;
3733 cache = yaffs_FindChunkCache(in,chunk);
3735 // If the chunk is already in the cache or it is less than a whole chunk
3736 // then use the cache (if there is caching)
3737 // else bypass the cache.
3738 if( cache || nToCopy != dev->nBytesPerChunk)
3740 if(dev->nShortOpCaches > 0)
3743 // If we can't find the data in the cache, then load it up.
3747 cache = yaffs_GrabChunkCache(in->myDev);
3749 cache->chunkId = chunk;
3752 yaffs_ReadChunkDataFromObject(in,chunk,cache->data);
3756 yaffs_UseChunkCache(dev,cache,0);
3760 #ifdef CONFIG_YAFFS_WINCE
3761 yfsd_UnlockYAFFS(TRUE);
3763 memcpy(buffer,&cache->data[start],nToCopy);
3765 #ifdef CONFIG_YAFFS_WINCE
3766 yfsd_LockYAFFS(TRUE);
3772 // Read into the local buffer then copy...
3774 __u8 *localBuffer = yaffs_GetTempBuffer(dev,__LINE__);
3775 yaffs_ReadChunkDataFromObject(in,chunk,localBuffer);
3776 #ifdef CONFIG_YAFFS_WINCE
3777 yfsd_UnlockYAFFS(TRUE);
3779 memcpy(buffer,&localBuffer[start],nToCopy);
3781 #ifdef CONFIG_YAFFS_WINCE
3782 yfsd_LockYAFFS(TRUE);
3784 yaffs_ReleaseTempBuffer(dev,localBuffer,__LINE__);
3790 #ifdef CONFIG_YAFFS_WINCE
3791 __u8 *localBuffer = yaffs_GetTempBuffer(dev,__LINE__);
3793 // Under WinCE can't do direct transfer. Need to use a local buffer.
3794 // This is because we otherwise screw up WinCE's memory mapper
3795 yaffs_ReadChunkDataFromObject(in,chunk,localBuffer);
3797 #ifdef CONFIG_YAFFS_WINCE
3798 yfsd_UnlockYAFFS(TRUE);
3800 memcpy(buffer,localBuffer,dev->nBytesPerChunk);
3802 #ifdef CONFIG_YAFFS_WINCE
3803 yfsd_LockYAFFS(TRUE);
3804 yaffs_ReleaseTempBuffer(dev,localBuffer,__LINE__);
3808 // A full chunk. Read directly into the supplied buffer.
3809 yaffs_ReadChunkDataFromObject(in,chunk,buffer);
3825 int yaffs_WriteDataToFile(yaffs_Object *in,const __u8 * buffer, __u32 offset, int nBytes, int writeThrough)
3834 int startOfWrite = offset;
3835 int chunkWritten = 0;
3843 while(n > 0 && chunkWritten >= 0)
3845 chunk = offset / dev->nBytesPerChunk + 1;
3846 start = offset % dev->nBytesPerChunk;
3849 // OK now check for the curveball where the start and end are in
3852 if((start + n) < dev->nBytesPerChunk)
3856 // Now folks, to calculate how many bytes to write back....
3857 // If we're overwriting and not writing to then end of file then
3858 // we need to write back as much as was there before.
3860 nBytesRead = in->variant.fileVariant.fileSize - ((chunk -1) * dev->nBytesPerChunk);
3862 if(nBytesRead > dev->nBytesPerChunk)
3864 nBytesRead = dev->nBytesPerChunk;
3867 nToWriteBack = (nBytesRead > (start + n)) ? nBytesRead : (start +n);
3872 nToCopy = dev->nBytesPerChunk - start;
3873 nToWriteBack = dev->nBytesPerChunk;
3876 if(nToCopy != dev->nBytesPerChunk)
3878 // An incomplete start or end chunk (or maybe both start and end chunk)
3879 if(dev->nShortOpCaches > 0)
3881 yaffs_ChunkCache *cache;
3882 // If we can't find the data in the cache, then load it up.
3883 cache = yaffs_FindChunkCache(in,chunk);
3884 if(!cache && yaffs_CheckSpaceForAllocation(in->myDev))
3886 cache = yaffs_GrabChunkCache(in->myDev);
3888 cache->chunkId = chunk;
3891 yaffs_ReadChunkDataFromObject(in,chunk,cache->data);
3896 yaffs_UseChunkCache(dev,cache,1);
3898 #ifdef CONFIG_YAFFS_WINCE
3899 yfsd_UnlockYAFFS(TRUE);
3902 memcpy(&cache->data[start],buffer,nToCopy);
3904 #ifdef CONFIG_YAFFS_WINCE
3905 yfsd_LockYAFFS(TRUE);
3908 cache->nBytes = nToWriteBack;
3912 chunkWritten = yaffs_WriteChunkDataToObject(cache->object,
3922 chunkWritten = -1; // fail the write
3927 // An incomplete start or end chunk (or maybe both start and end chunk)
3928 // Read into the local buffer then copy, then copy over and write back.
3930 __u8 *localBuffer = yaffs_GetTempBuffer(dev,__LINE__);
3932 yaffs_ReadChunkDataFromObject(in,chunk,localBuffer);
3934 #ifdef CONFIG_YAFFS_WINCE
3935 yfsd_UnlockYAFFS(TRUE);
3938 memcpy(&localBuffer[start],buffer,nToCopy);
3940 #ifdef CONFIG_YAFFS_WINCE
3941 yfsd_LockYAFFS(TRUE);
3943 chunkWritten = yaffs_WriteChunkDataToObject(in,chunk,localBuffer,nToWriteBack,0);
3945 yaffs_ReleaseTempBuffer(dev,localBuffer,__LINE__);
3947 //T(("Write with readback to chunk %d %d start %d copied %d wrote back %d\n",chunk,chunkWritten,start, nToCopy, nToWriteBack));
3954 #ifdef CONFIG_YAFFS_WINCE
3955 // Under WinCE can't do direct transfer. Need to use a local buffer.
3956 // This is because we otherwise screw up WinCE's memory mapper
3957 __u8 *localBuffer = yaffs_GetTempBuffer(dev,__LINE__);
3958 #ifdef CONFIG_YAFFS_WINCE
3959 yfsd_UnlockYAFFS(TRUE);
3961 memcpy(localBuffer,buffer,dev->nBytesPerChunk);
3962 #ifdef CONFIG_YAFFS_WINCE
3963 yfsd_LockYAFFS(TRUE);
3965 chunkWritten = yaffs_WriteChunkDataToObject(in,chunk,localBuffer,dev->nBytesPerChunk,0);
3966 yaffs_ReleaseTempBuffer(dev,localBuffer,__LINE__);
3968 // A full chunk. Write directly from the supplied buffer.
3969 chunkWritten = yaffs_WriteChunkDataToObject(in,chunk,buffer,dev->nBytesPerChunk,0);
3971 // Since we've overwritten the cached data, we better invalidate it.
3972 yaffs_InvalidateChunkCache(in,chunk);
3973 //T(("Write to chunk %d %d\n",chunk,chunkWritten));
3976 if(chunkWritten >= 0)
3986 // Update file object
3988 if((startOfWrite + nDone) > in->variant.fileVariant.fileSize)
3990 in->variant.fileVariant.fileSize = (startOfWrite + nDone);
3998 static void yaffs_PruneResizedChunks(yaffs_Object *in, int newSize)
4001 yaffs_Device *dev = in->myDev;
4002 int oldFileSize = in->variant.fileVariant.fileSize;
4005 int lastDel = 1 + (oldFileSize-1)/dev->nBytesPerChunk;
4007 int startDel = 1 + (newSize + dev->nBytesPerChunk - 1)/
4008 dev->nBytesPerChunk;
4012 // Delete backwards so that we don't end up with holes if
4013 // power is lost part-way through the operation.
4014 for(i = lastDel; i >= startDel; i--)
4016 // NB this could be optimised somewhat,
4017 // eg. could retrieve the tags and write them without
4018 // using yaffs_DeleteChunk
4020 chunkId = yaffs_FindAndDeleteChunkInFile(in,i,NULL);
4023 if(chunkId < (dev->internalStartBlock * dev->nChunksPerBlock) ||
4024 chunkId >= ((dev->internalEndBlock+1) * dev->nChunksPerBlock))
4026 T(YAFFS_TRACE_ALWAYS,(TSTR("Found daft chunkId %d for %d"TENDSTR),chunkId,i));
4031 yaffs_DeleteChunk(dev,chunkId,1,__LINE__);
4038 int yaffs_ResizeFile(yaffs_Object *in, int newSize)
4041 int oldFileSize = in->variant.fileVariant.fileSize;
4042 int sizeOfPartialChunk;
4043 yaffs_Device *dev = in->myDev;
4045 sizeOfPartialChunk = newSize % dev->nBytesPerChunk;
4048 yaffs_FlushFilesChunkCache(in);
4049 yaffs_InvalidateWholeChunkCache(in);
4051 yaffs_CheckGarbageCollection(dev);
4053 if(in->variantType != YAFFS_OBJECT_TYPE_FILE)
4055 return yaffs_GetFileSize(in);
4058 if(newSize < oldFileSize)
4061 yaffs_PruneResizedChunks(in,newSize);
4063 if(sizeOfPartialChunk != 0)
4065 int lastChunk = 1+ newSize/dev->nBytesPerChunk;
4066 __u8 *localBuffer = yaffs_GetTempBuffer(dev,__LINE__);
4068 // Got to read and rewrite the last chunk with its new size and zero pad
4069 yaffs_ReadChunkDataFromObject(in,lastChunk,localBuffer);
4071 memset(localBuffer + sizeOfPartialChunk,0, dev->nBytesPerChunk - sizeOfPartialChunk);
4073 yaffs_WriteChunkDataToObject(in,lastChunk,localBuffer,sizeOfPartialChunk,1);
4075 yaffs_ReleaseTempBuffer(dev,localBuffer,__LINE__);
4078 in->variant.fileVariant.fileSize = newSize;
4080 yaffs_PruneFileStructure(dev,&in->variant.fileVariant);
4082 // Write a new object header to show we've shrunk the file
4083 // Do this only if the file is not in the deleted directories.
4084 if(in->parent->objectId != YAFFS_OBJECTID_UNLINKED &&
4085 in->parent->objectId != YAFFS_OBJECTID_DELETED
4088 yaffs_UpdateObjectHeader(in,NULL, 0, 1);
4102 loff_t yaffs_GetFileSize(yaffs_Object *obj)
4104 obj = yaffs_GetEquivalentObject(obj);
4106 switch(obj->variantType)
4108 case YAFFS_OBJECT_TYPE_FILE:
4109 return obj->variant.fileVariant.fileSize;
4110 case YAFFS_OBJECT_TYPE_SYMLINK:
4111 return yaffs_strlen(obj->variant.symLinkVariant.alias);
4119 // yaffs_FlushFile() updates the file's
4122 int yaffs_FlushFile(yaffs_Object *in, int updateTime)
4127 //T(("flushing object header\n"));
4129 yaffs_FlushFilesChunkCache(in);
4132 #ifdef CONFIG_YAFFS_WINCE
4133 yfsd_WinFileTimeNow(in->win_mtime);
4136 in->yst_mtime = Y_CURRENT_TIME;
4141 retVal = (yaffs_UpdateObjectHeader(in,NULL,0,0) >= 0)? YAFFS_OK : YAFFS_FAIL;
4153 static int yaffs_DoGenericObjectDeletion(yaffs_Object *in)
4156 // First off, invalidate the file's data in the cache, without flushing.
4157 yaffs_InvalidateWholeChunkCache(in);
4159 if(in->myDev->isYaffs2 && (in->parent != in->myDev->deletedDir))
4161 // Move to the unlinked directory so we have a record that it was deleted.
4162 yaffs_ChangeObjectName(in, in->myDev->deletedDir,NULL,0);
4167 yaffs_RemoveObjectFromDirectory(in);
4168 yaffs_DeleteChunk(in->myDev,in->chunkId,1,__LINE__);
4174 in->myInode->u.generic_ip = NULL;
4180 yaffs_FreeObject(in);
4185 // yaffs_DeleteFile deletes the whole file data
4186 // and the inode associated with the file.
4187 // It does not delete the links associated with the file.
4188 static int yaffs_UnlinkFile(yaffs_Object *in)
4191 #ifdef CONFIG_YAFFS_DISABLE_BACKGROUND_DELETION
4193 // Delete the file data & tnodes
4195 yaffs_DeleteWorker(in, in->variant.fileVariant.top, in->variant.fileVariant.topLevel, 0,NULL);
4198 yaffs_FreeTnode(in->myDev,in->variant.fileVariant.top);
4200 return yaffs_DoGenericObjectDeletion(in);
4203 int immediateDeletion=0;
4208 //in->myDev->nUnlinkedFiles++;
4209 //in->renameAllowed = 0;
4213 immediateDeletion = 1;
4219 immediateDeletion = 1;
4223 if(immediateDeletion)
4225 retVal = yaffs_ChangeObjectName(in, in->myDev->deletedDir,NULL,0);
4226 T(YAFFS_TRACE_TRACING,(TSTR("yaffs: immediate deletion of file %d" TENDSTR),in->objectId));
4228 in->myDev->nDeletedFiles++;
4229 if( 0 && in->myDev->isYaffs2)
4231 yaffs_ResizeFile(in,0);
4233 yaffs_SoftDeleteFile(in);
4237 retVal = yaffs_ChangeObjectName(in, in->myDev->unlinkedDir,NULL,0);
4247 int yaffs_DeleteFile(yaffs_Object *in)
4249 int retVal = YAFFS_OK;
4251 if(in->nDataChunks > 0)
4253 // Use soft deletion
4256 retVal = yaffs_UnlinkFile(in);
4258 if(retVal == YAFFS_OK &&
4263 in->myDev->nDeletedFiles++;
4264 yaffs_SoftDeleteFile(in);
4266 return in->deleted ? YAFFS_OK : YAFFS_FAIL;
4270 // The file has no data chunks so we toss it immediately
4271 yaffs_FreeTnode(in->myDev,in->variant.fileVariant.top);
4272 in->variant.fileVariant.top = NULL;
4273 yaffs_DoGenericObjectDeletion(in);
4279 static int yaffs_DeleteDirectory(yaffs_Object *in)
4281 //First check that the directory is empty.
4282 if(list_empty(&in->variant.directoryVariant.children))
4284 return yaffs_DoGenericObjectDeletion(in);
4291 static int yaffs_DeleteSymLink(yaffs_Object *in)
4293 YFREE(in->variant.symLinkVariant.alias);
4295 return yaffs_DoGenericObjectDeletion(in);
4298 static int yaffs_DeleteHardLink(yaffs_Object *in)
4300 // remove this hardlink from the list assocaited with the equivalent
4302 list_del(&in->hardLinks);
4303 return yaffs_DoGenericObjectDeletion(in);
4307 static void yaffs_DestroyObject(yaffs_Object *obj)
4309 switch(obj->variantType)
4311 case YAFFS_OBJECT_TYPE_FILE: yaffs_DeleteFile(obj); break;
4312 case YAFFS_OBJECT_TYPE_DIRECTORY: yaffs_DeleteDirectory(obj); break;
4313 case YAFFS_OBJECT_TYPE_SYMLINK: yaffs_DeleteSymLink(obj); break;
4314 case YAFFS_OBJECT_TYPE_HARDLINK: yaffs_DeleteHardLink(obj); break;
4315 case YAFFS_OBJECT_TYPE_SPECIAL: yaffs_DoGenericObjectDeletion(obj); break;
4316 case YAFFS_OBJECT_TYPE_UNKNOWN: break; // should not happen.
4321 static int yaffs_UnlinkWorker(yaffs_Object *obj)
4325 if(obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK)
4327 return yaffs_DeleteHardLink(obj);
4329 else if(!list_empty(&obj->hardLinks))
4331 // Curve ball: We're unlinking an object that has a hardlink.
4333 // This problem arises because we are not strictly following
4334 // The Linux link/inode model.
4336 // We can't really delete the object.
4337 // Instead, we do the following:
4338 // - Select a hardlink.
4339 // - Unhook it from the hard links
4340 // - Unhook it from its parent directory (so that the rename can work)
4341 // - Rename the object to the hardlink's name.
4342 // - Delete the hardlink
4347 YCHAR name[YAFFS_MAX_NAME_LENGTH+1];
4349 hl = list_entry(obj->hardLinks.next,yaffs_Object,hardLinks);
4351 list_del_init(&hl->hardLinks);
4352 list_del_init(&hl->siblings);
4354 yaffs_GetObjectName(hl,name,YAFFS_MAX_NAME_LENGTH+1);
4356 retVal = yaffs_ChangeObjectName(obj, hl->parent, name,0);
4358 if(retVal == YAFFS_OK)
4360 retVal = yaffs_DoGenericObjectDeletion(hl);
4367 switch(obj->variantType)
4369 case YAFFS_OBJECT_TYPE_FILE:
4370 return yaffs_UnlinkFile(obj);
4372 case YAFFS_OBJECT_TYPE_DIRECTORY:
4373 return yaffs_DeleteDirectory(obj);
4375 case YAFFS_OBJECT_TYPE_SYMLINK:
4376 return yaffs_DeleteSymLink(obj);
4378 case YAFFS_OBJECT_TYPE_SPECIAL:
4379 return yaffs_DoGenericObjectDeletion(obj);
4381 case YAFFS_OBJECT_TYPE_HARDLINK:
4382 case YAFFS_OBJECT_TYPE_UNKNOWN:
4389 int yaffs_Unlink(yaffs_Object *dir, const YCHAR *name)
4393 obj = yaffs_FindObjectByName(dir,name);
4395 if(obj && obj->unlinkAllowed)
4397 return yaffs_UnlinkWorker(obj);
4404 //////////////// Initialisation Scanning /////////////////
4408 // For now we use the SmartMedia check.
4409 // We look at the blockStatus byte in the first two chunks
4410 // These must be 0xFF to pass as OK.
4411 // todo: this function needs to be modifyable foir different NAND types
4412 // and different chunk sizes. Suggest make this into a per-device configurable
4414 static int yaffs_IsBlockBad(yaffs_Device *dev, int blk)
4416 yaffsExtendedTags *tags;
4418 yaffs_ReadChunkFromNAND(dev,blk * dev->nChunksPerBlock,NULL,&tags,1);
4420 if(yaffs_CountBits(spare.blockStatus) < 7)
4425 if(spare.blockStatus != 0xFF)
4430 yaffs_ReadChunkFromNAND(dev,blk * dev->nChunksPerBlock + 1,NULL,&spare,1);
4433 if(yaffs_CountBits(spare.blockStatus) < 7)
4438 if(spare.blockStatus != 0xFF)
4459 static int yaffs_Scan(yaffs_Device *dev)
4461 yaffs_ExtendedTags tags;
4466 int nBlocksToScan = 0;
4471 yaffs_BlockState state;
4472 yaffs_Object *hardList = NULL;
4474 yaffs_BlockInfo *bi;
4476 yaffs_ObjectHeader *oh;
4478 yaffs_Object *parent;
4479 int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1;
4483 yaffs_BlockIndex *blockIndex = NULL;
4485 T(YAFFS_TRACE_SCAN,(TSTR("yaffs_Scan starts intstartblk %d intendblk %d..." TENDSTR),dev->internalStartBlock,dev->internalEndBlock));
4487 chunkData = yaffs_GetTempBuffer(dev,__LINE__);
4490 dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER;
4494 blockIndex = YMALLOC(nBlocks * sizeof(yaffs_BlockIndex));
4498 // Scan all the blocks to determine their state
4499 for(blk = dev->internalStartBlock; blk <= dev->internalEndBlock; blk++)
4501 bi = yaffs_GetBlockInfo(dev,blk);
4502 yaffs_ClearChunkBits(dev,blk);
4504 bi->softDeletions = 0;
4506 yaffs_QueryInitialBlockState(dev,blk,&state,&sequenceNumber);
4508 bi->blockState = state;
4509 bi->sequenceNumber = sequenceNumber;
4511 T(YAFFS_TRACE_SCAN_DEBUG,(TSTR("Block scanning block %d state %d seq %d" TENDSTR),blk,state,sequenceNumber));
4513 if(state == YAFFS_BLOCK_STATE_DEAD)
4515 T(YAFFS_TRACE_BAD_BLOCKS,(TSTR("block %d is bad" TENDSTR),blk));
4517 else if(state == YAFFS_BLOCK_STATE_EMPTY)
4519 T(YAFFS_TRACE_SCAN_DEBUG,(TSTR("Block empty " TENDSTR)));
4520 dev->nErasedBlocks++;
4521 dev->nFreeChunks += dev->nChunksPerBlock;
4523 else if(state == YAFFS_BLOCK_STATE_NEEDS_SCANNING)
4526 // Determine the highest sequence number
4527 if( dev->isYaffs2 &&
4528 sequenceNumber >= YAFFS_LOWEST_SEQUENCE_NUMBER &&
4529 sequenceNumber < YAFFS_HIGHEST_SEQUENCE_NUMBER)
4532 blockIndex[nBlocksToScan].seq = sequenceNumber;
4533 blockIndex[nBlocksToScan].block = blk;
4537 if(sequenceNumber >= dev->sequenceNumber)
4539 dev->sequenceNumber = sequenceNumber;
4542 else if(dev->isYaffs2)
4544 // TODO: Nasty sequence number!
4545 T(YAFFS_TRACE_SCAN,(TSTR("Block scanning block %d has bad sequence number %d" TENDSTR),blk,sequenceNumber));
4552 // Dungy old bubble sort for now...
4555 yaffs_BlockIndex temp;
4559 for(i = 0; i < nBlocksToScan; i++)
4560 for(j = i+1; j < nBlocksToScan; j++)
4561 if(blockIndex[i].seq > blockIndex[j].seq)
4563 temp = blockIndex[j];
4564 blockIndex[j] = blockIndex[i];
4565 blockIndex[i] = temp;
4570 // Now scan the blocks looking at the data.
4574 endIterator = nBlocksToScan-1;
4575 T(YAFFS_TRACE_SCAN_DEBUG,(TSTR("%d blocks to be scanned" TENDSTR),nBlocksToScan));
4579 startIterator = dev->internalStartBlock;
4580 endIterator = dev->internalEndBlock;
4583 // For each block....
4584 for(blockIterator = startIterator; blockIterator <= endIterator; blockIterator++)
4589 // get the block to scan in the correct order
4590 blk = blockIndex[blockIterator].block;
4594 blk = blockIterator;
4598 bi = yaffs_GetBlockInfo(dev,blk);
4599 state = bi->blockState;
4603 // For each chunk in each block that needs scanning....
4604 for(c = 0; c < dev->nChunksPerBlock &&
4605 state == YAFFS_BLOCK_STATE_NEEDS_SCANNING; c++)
4607 // Read the tags and decide what to do
4608 chunk = blk * dev->nChunksPerBlock + c;
4610 yaffs_ReadChunkWithTagsFromNAND(dev,chunk,NULL,&tags);
4612 // Let's have a good look at this chunk...
4615 if(!dev->isYaffs2 && tags.chunkDeleted)
4620 dev->nFreeChunks ++;
4621 //T((" %d %d deleted\n",blk,c));
4623 else if(!tags.chunkUsed)
4625 // An unassigned chunk in the block
4626 // This means that either the block is empty or
4627 // this is the one being allocated from
4631 // We're looking at the first chunk in the block so the block is unused
4632 state = YAFFS_BLOCK_STATE_EMPTY;
4633 dev->nErasedBlocks++;
4637 // this is the block being allocated from
4638 T(YAFFS_TRACE_SCAN,(TSTR(" Allocating from %d %d" TENDSTR),blk,c));
4639 state = YAFFS_BLOCK_STATE_ALLOCATING;
4640 dev->allocationBlock = blk;
4641 dev->allocationPage = c;
4642 dev->allocationBlockFinder = blk; // Set it to here to encourage the allocator to
4643 // go forth from here.
4644 //Yaffs2 sanity check:
4645 // This should be the one with the highest sequence number
4646 if(dev->isYaffs2 && (dev->sequenceNumber != bi->sequenceNumber))
4648 T(YAFFS_TRACE_ALWAYS,
4649 (TSTR("yaffs: Allocation block %d was not highest sequence id: block seq = %d, dev seq = %d" TENDSTR),
4650 blk,bi->sequenceNumber,dev->sequenceNumber));
4654 dev->nFreeChunks += (dev->nChunksPerBlock - c);
4656 else if(tags.chunkId > 0)
4658 // chunkId > 0 so it is a data chunk...
4659 unsigned int endpos;
4661 yaffs_SetChunkBit(dev,blk,c);
4664 in = yaffs_FindOrCreateObjectByNumber(dev,tags.objectId,YAFFS_OBJECT_TYPE_FILE);
4665 // PutChunkIntoFile checks for a clash (two data chunks with
4666 // the same chunkId).
4667 yaffs_PutChunkIntoFile(in,tags.chunkId,chunk,1);
4668 endpos = (tags.chunkId - 1)* dev->nBytesPerChunk + tags.byteCount;
4669 if(in->variantType == YAFFS_OBJECT_TYPE_FILE && in->variant.fileVariant.scannedFileSize <endpos)
4671 in->variant.fileVariant.scannedFileSize = endpos;
4672 if(!dev->useHeaderFileSize)
4674 in->variant.fileVariant.fileSize = in->variant.fileVariant.scannedFileSize;
4678 //T((" %d %d data %d %d\n",blk,c,tags.objectId,tags.chunkId));
4682 // chunkId == 0, so it is an ObjectHeader.
4683 // Thus, we read in the object header and make the object
4684 yaffs_SetChunkBit(dev,blk,c);
4687 yaffs_ReadChunkWithTagsFromNAND(dev,chunk,chunkData,NULL);
4689 oh = (yaffs_ObjectHeader *)chunkData;
4691 in = yaffs_FindObjectByNumber(dev,tags.objectId);
4692 if(in && in->variantType != oh->type)
4694 // This should not happen, but somehow
4695 // Wev'e ended up with an objectId that has been reused but not yet
4696 // deleted, and worse still it has changed type. Delete the old object.
4698 yaffs_DestroyObject(in);
4703 in = yaffs_FindOrCreateObjectByNumber(dev,tags.objectId,oh->type);
4707 // We have already filled this one. We have a duplicate and need to resolve it.
4709 unsigned existingSerial = in->serial;
4710 unsigned newSerial = tags.serialNumber;
4712 if( dev->isYaffs2 ||
4713 ((existingSerial+1) & 3) == newSerial)
4715 // Use new one - destroy the exisiting one
4716 yaffs_DeleteChunk(dev,in->chunkId,1,__LINE__);
4721 // Use existing - destroy this one.
4722 yaffs_DeleteChunk(dev,chunk,1,__LINE__);
4727 (tags.objectId == YAFFS_OBJECTID_ROOT ||
4728 tags.objectId == YAFFS_OBJECTID_LOSTNFOUND))
4730 // We only load some info, don't fiddle with directory structure
4732 in->variantType = oh->type;
4734 in->yst_mode = oh->yst_mode;
4735 #ifdef CONFIG_YAFFS_WINCE
4736 in->win_atime[0] = oh->win_atime[0];
4737 in->win_ctime[0] = oh->win_ctime[0];
4738 in->win_mtime[0] = oh->win_mtime[0];
4739 in->win_atime[1] = oh->win_atime[1];
4740 in->win_ctime[1] = oh->win_ctime[1];
4741 in->win_mtime[1] = oh->win_mtime[1];
4743 in->yst_uid = oh->yst_uid;
4744 in->yst_gid = oh->yst_gid;
4745 in->yst_atime = oh->yst_atime;
4746 in->yst_mtime = oh->yst_mtime;
4747 in->yst_ctime = oh->yst_ctime;
4748 in->yst_rdev = oh->yst_rdev;
4750 in->chunkId = chunk;
4755 // we need to load this info
4758 in->variantType = oh->type;
4760 in->yst_mode = oh->yst_mode;
4761 #ifdef CONFIG_YAFFS_WINCE
4762 in->win_atime[0] = oh->win_atime[0];
4763 in->win_ctime[0] = oh->win_ctime[0];
4764 in->win_mtime[0] = oh->win_mtime[0];
4765 in->win_atime[1] = oh->win_atime[1];
4766 in->win_ctime[1] = oh->win_ctime[1];
4767 in->win_mtime[1] = oh->win_mtime[1];
4769 in->yst_uid = oh->yst_uid;
4770 in->yst_gid = oh->yst_gid;
4771 in->yst_atime = oh->yst_atime;
4772 in->yst_mtime = oh->yst_mtime;
4773 in->yst_ctime = oh->yst_ctime;
4774 in->yst_rdev = oh->yst_rdev;
4776 in->chunkId = chunk;
4778 yaffs_SetObjectName(in,oh->name);
4781 // directory stuff...
4782 // hook up to parent
4784 parent = yaffs_FindOrCreateObjectByNumber(dev,oh->parentObjectId,YAFFS_OBJECT_TYPE_DIRECTORY);
4785 if(parent->variantType == YAFFS_OBJECT_TYPE_UNKNOWN)
4787 // Set up as a directory
4788 parent->variantType = YAFFS_OBJECT_TYPE_DIRECTORY;
4789 INIT_LIST_HEAD(&parent->variant.directoryVariant.children);
4791 else if(parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
4793 // Hoosterman, another problem....
4794 // We're trying to use a non-directory as a directory
4796 T(YAFFS_TRACE_ERROR, (TSTR("yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found." TENDSTR)));
4797 parent = dev->lostNFoundDir;
4800 yaffs_AddObjectToDirectory(parent,in);
4802 if(0 && (parent == dev->deletedDir ||
4803 parent == dev->unlinkedDir))
4805 in->deleted = 1; // If it is unlinked at start up then it wants deleting
4806 dev->nDeletedFiles++;
4809 // Note re hardlinks.
4810 // Since we might scan a hardlink before its equivalent object is scanned
4811 // we put them all in a list.
4812 // After scanning is complete, we should have all the objects, so we run through this
4813 // list and fix up all the chains.
4815 switch(in->variantType)
4817 case YAFFS_OBJECT_TYPE_UNKNOWN: // Todo got a problem
4819 case YAFFS_OBJECT_TYPE_FILE:
4820 if(dev->isYaffs2 && oh->isShrink)
4822 // Prune back the shrunken chunks
4823 yaffs_PruneResizedChunks(in,oh->fileSize);
4824 // Mark the block as having a shrinkHeader
4825 bi->hasShrinkHeader = 1;
4828 if(dev->useHeaderFileSize)
4830 in->variant.fileVariant.fileSize = oh->fileSize;
4833 case YAFFS_OBJECT_TYPE_HARDLINK:
4834 in->variant.hardLinkVariant.equivalentObjectId = oh->equivalentObjectId;
4835 in->hardLinks.next = (struct list_head *)hardList;
4838 case YAFFS_OBJECT_TYPE_DIRECTORY: // Do nothing
4840 case YAFFS_OBJECT_TYPE_SPECIAL: // Do nothing
4842 case YAFFS_OBJECT_TYPE_SYMLINK: // Do nothing
4843 in->variant.symLinkVariant.alias = yaffs_CloneString(oh->alias);
4847 if(parent == dev->deletedDir)
4849 yaffs_DestroyObject(in);
4850 bi->hasShrinkHeader = 1;
4852 //T((" %d %d header %d \"%s\" type %d\n",blk,c,tags.objectId,oh->name,in->variantType));
4857 if(state == YAFFS_BLOCK_STATE_NEEDS_SCANNING)
4859 // If we got this far while scanning, then the block is fully allocated.
4860 state = YAFFS_BLOCK_STATE_FULL;
4863 bi->blockState = state;
4865 // Now let's see if it was dirty
4866 if( bi->pagesInUse == 0 &&
4867 !bi->hasShrinkHeader &&
4868 bi->blockState == YAFFS_BLOCK_STATE_FULL)
4870 yaffs_BlockBecameDirty(dev,blk);
4880 // Ok, we've done all the scanning.
4882 // Fix up the hard link chains.
4883 // We should now have scanned all the objects, now it's time to add these
4888 hardList = (yaffs_Object *)(hardList->hardLinks.next);
4890 in = yaffs_FindObjectByNumber(dev,hl->variant.hardLinkVariant.equivalentObjectId);
4894 // Add the hardlink pointers
4895 hl->variant.hardLinkVariant.equivalentObject=in;
4896 list_add(&hl->hardLinks,&in->hardLinks);
4900 //Todo Need to report/handle this better.
4901 // Got a problem... hardlink to a non-existant object
4902 hl->variant.hardLinkVariant.equivalentObject=NULL;
4903 INIT_LIST_HEAD(&hl->hardLinks);
4910 struct list_head *i;
4911 struct list_head *n;
4914 // Soft delete all the unlinked files
4915 list_for_each_safe(i,n,&dev->unlinkedDir->variant.directoryVariant.children)
4919 l = list_entry(i, yaffs_Object,siblings);
4920 yaffs_DestroyObject(l);
4925 yaffs_ReleaseTempBuffer(dev,chunkData,__LINE__);
4927 T(YAFFS_TRACE_SCAN,(TSTR("yaffs_Scan ends" TENDSTR)));
4933 static int yaffs_ScanBackwards(yaffs_Device *dev)
4935 yaffs_ExtendedTags tags;
4940 int nBlocksToScan = 0;
4945 yaffs_BlockState state;
4946 yaffs_Object *hardList = NULL;
4948 yaffs_BlockInfo *bi;
4950 yaffs_ObjectHeader *oh;
4952 yaffs_Object *parent;
4953 int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1;
4957 yaffs_BlockIndex *blockIndex = NULL;
4962 T(YAFFS_TRACE_SCAN,(TSTR("yaffs_ScanBackwards is only for YAFFS2!" TENDSTR)));
4966 T(YAFFS_TRACE_SCAN,(TSTR("yaffs_ScanBackwards starts intstartblk %d intendblk %d..." TENDSTR),dev->internalStartBlock,dev->internalEndBlock));
4968 chunkData = yaffs_GetTempBuffer(dev,__LINE__);
4971 dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER;
4973 blockIndex = YMALLOC(nBlocks * sizeof(yaffs_BlockIndex));
4976 // Scan all the blocks to determine their state
4977 for(blk = dev->internalStartBlock; blk <= dev->internalEndBlock; blk++)
4979 bi = yaffs_GetBlockInfo(dev,blk);
4980 yaffs_ClearChunkBits(dev,blk);
4982 bi->softDeletions = 0;
4984 yaffs_QueryInitialBlockState(dev,blk,&state,&sequenceNumber);
4986 bi->blockState = state;
4987 bi->sequenceNumber = sequenceNumber;
4989 T(YAFFS_TRACE_SCAN_DEBUG,(TSTR("Block scanning block %d state %d seq %d" TENDSTR),blk,state,sequenceNumber));
4991 if(state == YAFFS_BLOCK_STATE_DEAD)
4993 T(YAFFS_TRACE_BAD_BLOCKS,(TSTR("block %d is bad" TENDSTR),blk));
4995 else if(state == YAFFS_BLOCK_STATE_EMPTY)
4997 T(YAFFS_TRACE_SCAN_DEBUG,(TSTR("Block empty " TENDSTR)));
4998 dev->nErasedBlocks++;
4999 dev->nFreeChunks += dev->nChunksPerBlock;
5001 else if(state == YAFFS_BLOCK_STATE_NEEDS_SCANNING)
5004 // Determine the highest sequence number
5005 if( dev->isYaffs2 &&
5006 sequenceNumber >= YAFFS_LOWEST_SEQUENCE_NUMBER &&
5007 sequenceNumber < YAFFS_HIGHEST_SEQUENCE_NUMBER)
5010 blockIndex[nBlocksToScan].seq = sequenceNumber;
5011 blockIndex[nBlocksToScan].block = blk;
5015 if(sequenceNumber >= dev->sequenceNumber)
5017 dev->sequenceNumber = sequenceNumber;
5020 else if(dev->isYaffs2)
5022 // TODO: Nasty sequence number!
5023 T(YAFFS_TRACE_SCAN,(TSTR("Block scanning block %d has bad sequence number %d" TENDSTR),blk,sequenceNumber));
5030 // Dungy old bubble sort for now...
5032 yaffs_BlockIndex temp;
5036 for(i = 0; i < nBlocksToScan; i++)
5037 for(j = i+1; j < nBlocksToScan; j++)
5038 if(blockIndex[i].seq > blockIndex[j].seq)
5040 temp = blockIndex[j];
5041 blockIndex[j] = blockIndex[i];
5042 blockIndex[i] = temp;
5047 // Now scan the blocks looking at the data.
5049 endIterator = nBlocksToScan-1;
5050 T(YAFFS_TRACE_SCAN_DEBUG,(TSTR("%d blocks to be scanned" TENDSTR),nBlocksToScan));
5053 // For each block.... backwards
5054 for(blockIterator = endIterator; blockIterator >= startIterator; blockIterator--)
5057 // get the block to scan in the correct order
5058 blk = blockIndex[blockIterator].block;
5061 bi = yaffs_GetBlockInfo(dev,blk);
5062 state = bi->blockState;
5066 if( 0 && // Disable since this is redundant.
5067 state == YAFFS_BLOCK_STATE_NEEDS_SCANNING)
5069 // Let's look at the first chunk in the block
5070 chunk = blk * dev->nChunksPerBlock;
5072 yaffs_ReadChunkWithTagsFromNAND(dev,chunk,NULL,&tags);
5074 // Let's have a good look at this chunk...
5078 // An unassigned chunk in the block
5079 // This means that either the block is empty or
5080 // this is the one being allocated from
5082 // We're looking at the first chunk in the block so the block is unused
5083 state = YAFFS_BLOCK_STATE_EMPTY;
5084 dev->nErasedBlocks++;
5085 dev->nFreeChunks += dev->nChunksPerBlock;
5090 // For each chunk in each block that needs scanning....
5091 for(c = dev->nChunksPerBlock-1; c >= 0 &&
5092 (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
5093 state == YAFFS_BLOCK_STATE_ALLOCATING); c--)
5095 // Scan backwards...
5096 // Read the tags and decide what to do
5097 chunk = blk * dev->nChunksPerBlock + c;
5099 yaffs_ReadChunkWithTagsFromNAND(dev,chunk,NULL,&tags);
5101 // Let's have a good look at this chunk...
5105 // An unassigned chunk in the block
5106 // This means that either the block is empty or
5107 // this is the one being allocated from
5111 // We're looking at the first chunk in the block so the block is unused
5112 state = YAFFS_BLOCK_STATE_EMPTY;
5113 dev->nErasedBlocks++;
5117 // this is the block being allocated from
5118 if(state == YAFFS_BLOCK_STATE_NEEDS_SCANNING)
5120 T(YAFFS_TRACE_SCAN,(TSTR(" Allocating from %d %d" TENDSTR),blk,c));
5122 state = YAFFS_BLOCK_STATE_ALLOCATING;
5123 dev->allocationBlock = blk;
5124 dev->allocationPage = c;
5125 dev->allocationBlockFinder = blk; // Set it to here to encourage the allocator to
5126 // go forth from here.
5127 //Yaffs2 sanity check:
5128 // This should be the one with the highest sequence number
5129 if(dev->isYaffs2 && (dev->sequenceNumber != bi->sequenceNumber))
5131 T(YAFFS_TRACE_ALWAYS,
5132 (TSTR("yaffs: Allocation block %d was not highest sequence id: block seq = %d, dev seq = %d" TENDSTR),
5133 blk,bi->sequenceNumber,dev->sequenceNumber));
5137 dev->nFreeChunks ++;
5139 else if(tags.chunkId > 0)
5141 // chunkId > 0 so it is a data chunk...
5142 unsigned int endpos;
5144 __u32 chunkBase = (tags.chunkId - 1)* dev->nBytesPerChunk;
5146 yaffs_SetChunkBit(dev,blk,c);
5149 in = yaffs_FindOrCreateObjectByNumber(dev,tags.objectId,YAFFS_OBJECT_TYPE_FILE);
5150 if(in->variantType == YAFFS_OBJECT_TYPE_FILE &&
5151 chunkBase < in->variant.fileVariant.shrinkSize)
5153 // This has not been invalidated by a resize
5154 yaffs_PutChunkIntoFile(in,tags.chunkId,chunk,-1);
5157 // File size is calculated by looking at the data chunks if we have not
5158 // seen an object header yet. Stop this practice once we find an object header.
5159 endpos = (tags.chunkId - 1)* dev->nBytesPerChunk + tags.byteCount;
5160 if(!in->valid && // have not got an object header yet
5161 in->variant.fileVariant.scannedFileSize <endpos)
5163 in->variant.fileVariant.scannedFileSize = endpos;
5164 in->variant.fileVariant.fileSize = in->variant.fileVariant.scannedFileSize;
5170 // This chunk has been invalidated by a resize, so delete
5171 yaffs_DeleteChunk(dev,chunk,1,__LINE__);
5175 //T((" %d %d data %d %d\n",blk,c,tags.objectId,tags.chunkId));
5179 // chunkId == 0, so it is an ObjectHeader.
5180 // Thus, we read in the object header and make the object
5181 yaffs_SetChunkBit(dev,blk,c);
5187 if(tags.extraHeaderInfoAvailable)
5189 in = yaffs_FindOrCreateObjectByNumber(dev,tags.objectId,tags.extraObjectType);
5193 if(!in || !in->valid)
5196 // If we don't have valid info then we need to read the chunk
5197 // TODO In future we can probably defer reading the chunk and
5198 // living with invalid data until needed.
5200 yaffs_ReadChunkWithTagsFromNAND(dev,chunk,chunkData,NULL);
5202 oh = (yaffs_ObjectHeader *)chunkData;
5205 in = yaffs_FindOrCreateObjectByNumber(dev,tags.objectId,oh->type);
5211 // TODO Hoosterman we have a problem!
5212 T(YAFFS_TRACE_ERROR, (TSTR("yaffs tragedy: Could not make object for object %d at chunk %d during scan" TENDSTR),tags.objectId,chunk));
5218 // We have already filled this one. We have a duplicate that will be discarded, but
5219 // we first have to suck out resize info if it is a file.
5221 if( (in->variantType == YAFFS_OBJECT_TYPE_FILE) &&
5222 ((oh && oh->type == YAFFS_OBJECT_TYPE_FILE) ||
5223 (tags.extraHeaderInfoAvailable && tags.extraObjectType == YAFFS_OBJECT_TYPE_FILE))
5226 __u32 thisSize = (oh) ? oh->fileSize : tags.extraFileLength;
5227 __u32 parentObjectId = (oh) ? oh->parentObjectId : tags.extraParentObjectId;
5228 unsigned isShrink = (oh) ? oh->isShrink : tags.extraIsShrinkHeader;
5230 // If it is deleted (unlinked at start also means deleted)
5231 // we treat the file size as being zeroed at this point.
5232 if(parentObjectId == YAFFS_OBJECTID_DELETED ||
5233 parentObjectId == YAFFS_OBJECTID_UNLINKED)
5239 if(in->variant.fileVariant.shrinkSize > thisSize)
5241 in->variant.fileVariant.shrinkSize = thisSize;
5246 bi->hasShrinkHeader = 1;
5250 // Use existing - destroy this one.
5251 yaffs_DeleteChunk(dev,chunk,1,__LINE__);
5256 (tags.objectId == YAFFS_OBJECTID_ROOT ||
5257 tags.objectId == YAFFS_OBJECTID_LOSTNFOUND))
5259 // We only load some info, don't fiddle with directory structure
5261 in->variantType = oh->type;
5263 in->yst_mode = oh->yst_mode;
5264 #ifdef CONFIG_YAFFS_WINCE
5265 in->win_atime[0] = oh->win_atime[0];
5266 in->win_ctime[0] = oh->win_ctime[0];
5267 in->win_mtime[0] = oh->win_mtime[0];
5268 in->win_atime[1] = oh->win_atime[1];
5269 in->win_ctime[1] = oh->win_ctime[1];
5270 in->win_mtime[1] = oh->win_mtime[1];
5272 in->yst_uid = oh->yst_uid;
5273 in->yst_gid = oh->yst_gid;
5274 in->yst_atime = oh->yst_atime;
5275 in->yst_mtime = oh->yst_mtime;
5276 in->yst_ctime = oh->yst_ctime;
5277 in->yst_rdev = oh->yst_rdev;
5279 in->chunkId = chunk;
5284 // we need to load this info
5287 in->variantType = oh->type;
5289 in->yst_mode = oh->yst_mode;
5290 #ifdef CONFIG_YAFFS_WINCE
5291 in->win_atime[0] = oh->win_atime[0];
5292 in->win_ctime[0] = oh->win_ctime[0];
5293 in->win_mtime[0] = oh->win_mtime[0];
5294 in->win_atime[1] = oh->win_atime[1];
5295 in->win_ctime[1] = oh->win_ctime[1];
5296 in->win_mtime[1] = oh->win_mtime[1];
5298 in->yst_uid = oh->yst_uid;
5299 in->yst_gid = oh->yst_gid;
5300 in->yst_atime = oh->yst_atime;
5301 in->yst_mtime = oh->yst_mtime;
5302 in->yst_ctime = oh->yst_ctime;
5303 in->yst_rdev = oh->yst_rdev;
5305 in->chunkId = chunk;
5307 yaffs_SetObjectName(in,oh->name);
5310 // directory stuff...
5311 // hook up to parent
5313 parent = yaffs_FindOrCreateObjectByNumber(dev,oh->parentObjectId,YAFFS_OBJECT_TYPE_DIRECTORY);
5314 if(parent->variantType == YAFFS_OBJECT_TYPE_UNKNOWN)
5316 // Set up as a directory
5317 parent->variantType = YAFFS_OBJECT_TYPE_DIRECTORY;
5318 INIT_LIST_HEAD(&parent->variant.directoryVariant.children);
5320 else if(parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
5322 // Hoosterman, another problem....
5323 // We're trying to use a non-directory as a directory
5325 T(YAFFS_TRACE_ERROR, (TSTR("yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found." TENDSTR)));
5326 parent = dev->lostNFoundDir;
5329 yaffs_AddObjectToDirectory(parent,in);
5331 if((parent == dev->deletedDir ||
5332 parent == dev->unlinkedDir))
5334 in->deleted = 1; // If it is unlinked at start up then it wants deleting
5339 // Mark the block as having a shrinkHeader
5340 bi->hasShrinkHeader = 1;
5344 // Note re hardlinks.
5345 // Since we might scan a hardlink before its equivalent object is scanned
5346 // we put them all in a list.
5347 // After scanning is complete, we should have all the objects, so we run through this
5348 // list and fix up all the chains.
5350 switch(in->variantType)
5352 case YAFFS_OBJECT_TYPE_UNKNOWN: // Todo got a problem
5354 case YAFFS_OBJECT_TYPE_FILE:
5357 if(in->variant.fileVariant.scannedFileSize < oh->fileSize)
5359 in->variant.fileVariant.fileSize = oh->fileSize;
5360 in->variant.fileVariant.scannedFileSize = in->variant.fileVariant.fileSize;
5365 if(in->variant.fileVariant.shrinkSize > oh->fileSize)
5367 in->variant.fileVariant.shrinkSize = oh->fileSize;
5372 case YAFFS_OBJECT_TYPE_HARDLINK:
5373 in->variant.hardLinkVariant.equivalentObjectId = oh->equivalentObjectId;
5374 in->hardLinks.next = (struct list_head *)hardList;
5377 case YAFFS_OBJECT_TYPE_DIRECTORY: // Do nothing
5379 case YAFFS_OBJECT_TYPE_SPECIAL: // Do nothing
5381 case YAFFS_OBJECT_TYPE_SYMLINK: // Do nothing
5382 in->variant.symLinkVariant.alias = yaffs_CloneString(oh->alias);
5387 if(parent == dev->deletedDir)
5389 yaffs_DestroyObject(in);
5390 bi->hasShrinkHeader = 1;
5393 //T((" %d %d header %d \"%s\" type %d\n",blk,c,tags.objectId,oh->name,in->variantType));
5398 if(state == YAFFS_BLOCK_STATE_NEEDS_SCANNING)
5400 // If we got this far while scanning, then the block is fully allocated.
5401 state = YAFFS_BLOCK_STATE_FULL;
5404 bi->blockState = state;
5406 // Now let's see if it was dirty
5407 if( bi->pagesInUse == 0 &&
5408 !bi->hasShrinkHeader &&
5409 bi->blockState == YAFFS_BLOCK_STATE_FULL)
5411 yaffs_BlockBecameDirty(dev,blk);
5421 // Ok, we've done all the scanning.
5423 // Fix up the hard link chains.
5424 // We should now have scanned all the objects, now it's time to add these
5429 hardList = (yaffs_Object *)(hardList->hardLinks.next);
5431 in = yaffs_FindObjectByNumber(dev,hl->variant.hardLinkVariant.equivalentObjectId);
5435 // Add the hardlink pointers
5436 hl->variant.hardLinkVariant.equivalentObject=in;
5437 list_add(&hl->hardLinks,&in->hardLinks);
5441 //Todo Need to report/handle this better.
5442 // Got a problem... hardlink to a non-existant object
5443 hl->variant.hardLinkVariant.equivalentObject=NULL;
5444 INIT_LIST_HEAD(&hl->hardLinks);
5451 struct list_head *i;
5452 struct list_head *n;
5456 // Soft delete all the unlinked files
5457 list_for_each_safe(i,n,&dev->unlinkedDir->variant.directoryVariant.children)
5461 l = list_entry(i, yaffs_Object,siblings);
5462 yaffs_DestroyObject(l);
5466 // Soft delete all the deletedDir files
5467 list_for_each_safe(i,n,&dev->deletedDir->variant.directoryVariant.children)
5471 l = list_entry(i, yaffs_Object,siblings);
5472 yaffs_DestroyObject(l);
5478 yaffs_ReleaseTempBuffer(dev,chunkData,__LINE__);
5480 T(YAFFS_TRACE_SCAN,(TSTR("yaffs_ScanBackwards ends" TENDSTR)));
5487 ////////////////////////// Directory Functions /////////////////////////
5490 static void yaffs_AddObjectToDirectory(yaffs_Object *directory, yaffs_Object *obj)
5495 T(YAFFS_TRACE_ALWAYS,(TSTR("tragedy: Trying to add an object to a null pointer directory" TENDSTR)));
5498 if(directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
5500 T(YAFFS_TRACE_ALWAYS,(TSTR("tragedy: Trying to add an object to a non-directory" TENDSTR)));
5504 if(obj->siblings.prev == NULL)
5507 INIT_LIST_HEAD(&obj->siblings);
5510 else if(!list_empty(&obj->siblings))
5512 // If it is holed up somewhere else, un hook it
5513 list_del_init(&obj->siblings);
5516 list_add(&obj->siblings,&directory->variant.directoryVariant.children);
5517 obj->parent = directory;
5519 if(directory == obj->myDev->unlinkedDir || directory == obj->myDev->deletedDir)
5522 obj->myDev->nUnlinkedFiles++;
5523 obj->renameAllowed = 0;
5527 static void yaffs_RemoveObjectFromDirectory(yaffs_Object *obj)
5529 list_del_init(&obj->siblings);
5533 yaffs_Object *yaffs_FindObjectByName(yaffs_Object *directory,const YCHAR *name)
5537 struct list_head *i;
5538 YCHAR buffer[YAFFS_MAX_NAME_LENGTH+1];
5545 T(YAFFS_TRACE_ALWAYS,(TSTR("tragedy: yaffs_FindObjectByName: null pointer directory"TENDSTR)));
5548 if(directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
5550 T(YAFFS_TRACE_ALWAYS,(TSTR("tragedy: yaffs_FindObjectByName: non-directory"TENDSTR)));
5554 sum = yaffs_CalcNameSum(name);
5556 list_for_each(i,&directory->variant.directoryVariant.children)
5560 l = list_entry(i, yaffs_Object,siblings);
5562 // Special case for lost-n-found
5563 if(l->objectId == YAFFS_OBJECTID_LOSTNFOUND)
5565 if(yaffs_strcmp(name,YAFFS_LOSTNFOUND_NAME) == 0)
5570 else if(yaffs_SumCompare(l->sum, sum)||
5571 l->chunkId <= 0) //LostnFound cunk called Objxxx
5574 yaffs_GetObjectName(l,buffer,YAFFS_MAX_NAME_LENGTH);
5575 if(yaffs_strcmp(name,buffer) == 0)
5588 int yaffs_ApplyToDirectoryChildren(yaffs_Object *theDir,int (*fn)(yaffs_Object *))
5590 struct list_head *i;
5596 T(YAFFS_TRACE_ALWAYS,(TSTR("tragedy: yaffs_FindObjectByName: null pointer directory"TENDSTR)));
5599 if(theDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
5601 T(YAFFS_TRACE_ALWAYS,(TSTR("tragedy: yaffs_FindObjectByName: non-directory"TENDSTR)));
5605 list_for_each(i,&theDir->variant.directoryVariant.children)
5609 l = list_entry(i, yaffs_Object,siblings);
5622 // GetEquivalentObject dereferences any hard links to get to the
5625 yaffs_Object *yaffs_GetEquivalentObject(yaffs_Object *obj)
5627 if(obj && obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK)
5629 // We want the object id of the equivalent object, not this one
5630 obj = obj->variant.hardLinkVariant.equivalentObject;
5636 int yaffs_GetObjectName(yaffs_Object *obj,YCHAR *name,int buffSize)
5638 memset(name,0,buffSize * sizeof(YCHAR));
5640 if(obj->objectId == YAFFS_OBJECTID_LOSTNFOUND)
5642 yaffs_strncpy(name,YAFFS_LOSTNFOUND_NAME,buffSize - 1);
5644 else if(obj->chunkId <= 0)
5648 yaffs_sprintf(locName,_Y("%s%d"),YAFFS_LOSTNFOUND_PREFIX,obj->objectId);
5649 yaffs_strncpy(name,locName,buffSize - 1);
5652 #ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM
5653 else if(obj->shortName[0])
5655 yaffs_strcpy(name,obj->shortName);
5660 __u8 *buffer = yaffs_GetTempBuffer(obj->myDev,__LINE__);
5662 yaffs_ObjectHeader *oh = (yaffs_ObjectHeader *)buffer;
5664 memset(buffer,0,obj->myDev->nBytesPerChunk);
5666 if(obj->chunkId >= 0)
5668 yaffs_ReadChunkWithTagsFromNAND(obj->myDev,obj->chunkId,buffer,NULL);
5670 yaffs_strncpy(name,oh->name,buffSize - 1);
5672 yaffs_ReleaseTempBuffer(obj->myDev,buffer,__LINE__);
5675 return yaffs_strlen(name);
5678 int yaffs_GetObjectFileLength(yaffs_Object *obj)
5681 // Dereference any hard linking
5682 obj = yaffs_GetEquivalentObject(obj);
5684 if(obj->variantType == YAFFS_OBJECT_TYPE_FILE)
5686 return obj->variant.fileVariant.fileSize;
5688 if(obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK)
5690 return yaffs_strlen(obj->variant.symLinkVariant.alias);
5694 // Only a directory should drop through to here
5695 return obj->myDev->nBytesPerChunk;
5699 int yaffs_GetObjectLinkCount(yaffs_Object *obj)
5702 struct list_head *i;
5706 count++; // the object itself
5708 list_for_each(i,&obj->hardLinks)
5710 count++; // add the hard links;
5717 int yaffs_GetObjectInode(yaffs_Object *obj)
5719 obj = yaffs_GetEquivalentObject(obj);
5721 return obj->objectId;
5724 unsigned yaffs_GetObjectType(yaffs_Object *obj)
5726 obj = yaffs_GetEquivalentObject(obj);
5728 switch(obj->variantType)
5730 case YAFFS_OBJECT_TYPE_FILE: return DT_REG; break;
5731 case YAFFS_OBJECT_TYPE_DIRECTORY: return DT_DIR; break;
5732 case YAFFS_OBJECT_TYPE_SYMLINK: return DT_LNK; break;
5733 case YAFFS_OBJECT_TYPE_HARDLINK: return DT_REG; break;
5734 case YAFFS_OBJECT_TYPE_SPECIAL:
5735 if(S_ISFIFO(obj->yst_mode)) return DT_FIFO;
5736 if(S_ISCHR(obj->yst_mode)) return DT_CHR;
5737 if(S_ISBLK(obj->yst_mode)) return DT_BLK;
5738 if(S_ISSOCK(obj->yst_mode)) return DT_SOCK;
5739 default: return DT_REG; break;
5743 YCHAR *yaffs_GetSymlinkAlias(yaffs_Object *obj)
5745 obj = yaffs_GetEquivalentObject(obj);
5746 if(obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK)
5748 return yaffs_CloneString(obj->variant.symLinkVariant.alias);
5752 return yaffs_CloneString(_Y(""));
5756 #ifndef CONFIG_YAFFS_WINCE
5758 int yaffs_SetAttributes(yaffs_Object *obj, struct iattr *attr)
5760 unsigned int valid = attr->ia_valid;
5762 if(valid & ATTR_MODE) obj->yst_mode = attr->ia_mode;
5763 if(valid & ATTR_UID) obj->yst_uid = attr->ia_uid;
5764 if(valid & ATTR_GID) obj->yst_gid = attr->ia_gid;
5766 if(valid & ATTR_ATIME) obj->yst_atime = Y_TIME_CONVERT(attr->ia_atime);
5767 if(valid & ATTR_CTIME) obj->yst_ctime = Y_TIME_CONVERT(attr->ia_ctime);
5768 if(valid & ATTR_MTIME) obj->yst_mtime = Y_TIME_CONVERT(attr->ia_mtime);
5770 if(valid & ATTR_SIZE) yaffs_ResizeFile(obj,attr->ia_size);
5772 yaffs_UpdateObjectHeader(obj,NULL,1,0);
5777 int yaffs_GetAttributes(yaffs_Object *obj, struct iattr *attr)
5779 unsigned int valid = 0;
5781 attr->ia_mode = obj->yst_mode; valid |= ATTR_MODE;
5782 attr->ia_uid = obj->yst_uid; valid |= ATTR_UID;
5783 attr->ia_gid = obj->yst_gid; valid |= ATTR_GID;
5785 Y_TIME_CONVERT(attr->ia_atime)= obj->yst_atime; valid |= ATTR_ATIME;
5786 Y_TIME_CONVERT(attr->ia_ctime) = obj->yst_ctime; valid |= ATTR_CTIME;
5787 Y_TIME_CONVERT(attr->ia_mtime) = obj->yst_mtime; valid |= ATTR_MTIME;
5789 attr->ia_size = yaffs_GetFileSize(obj); valid |= ATTR_SIZE;
5791 attr->ia_valid = valid;
5799 int yaffs_DumpObject(yaffs_Object *obj)
5801 // __u8 buffer[YAFFS_BYTES_PER_CHUNK];
5803 // yaffs_ObjectHeader *oh = (yaffs_ObjectHeader *)buffer;
5805 // memset(buffer,0,YAFFS_BYTES_PER_CHUNK);
5807 // if(obj->chunkId >= 0)
5809 // yaffs_ReadChunkFromNAND(obj->myDev,obj->chunkId,buffer,NULL);
5812 yaffs_GetObjectName(obj,name,256);
5814 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),
5815 obj->objectId,yaffs_GetObjectInode(obj), name, obj->dirty, obj->valid, obj->serial,
5816 obj->sum, obj->chunkId, yaffs_GetObjectType(obj), yaffs_GetObjectFileLength(obj)));
5819 YPRINTF(("Object %d \"%s\"\n dirty %d valid %d serial %d sum %d chunk %d\n",
5820 obj->objectId, oh->name, obj->dirty, obj->valid, obj->serial,
5821 obj->sum, obj->chunkId));
5822 switch(obj->variantType)
5824 case YAFFS_OBJECT_TYPE_FILE:
5825 YPRINTF((" FILE length %d\n",obj->variant.fileVariant.fileSize));
5827 case YAFFS_OBJECT_TYPE_DIRECTORY:
5828 YPRINTF((" DIRECTORY\n"));
5830 case YAFFS_OBJECT_TYPE_HARDLINK: //todo
5831 case YAFFS_OBJECT_TYPE_SYMLINK:
5832 case YAFFS_OBJECT_TYPE_UNKNOWN:
5841 ///////////////////////// Initialisation code ///////////////////////////
5844 int yaffs_CheckDevFunctions(const yaffs_Device *dev)
5847 // Common functions, gotta have
5848 if(!dev->eraseBlockInNAND ||
5849 !dev->initialiseNAND) return 0;
5851 #ifdef CONFIG_YAFFS_YAFFS2
5853 // Can use the "with tags" style interface for yaffs1 or yaffs2
5854 if(dev->writeChunkWithTagsToNAND &&
5855 dev->readChunkWithTagsFromNAND &&
5856 !dev->writeChunkToNAND &&
5857 !dev->readChunkFromNAND &&
5858 dev->markNANDBlockBad &&
5859 dev->queryNANDBlock) return 1;
5862 // Can use the "spare" style interface for yaffs1
5863 if(!dev->isYaffs2 &&
5864 !dev->writeChunkWithTagsToNAND &&
5865 !dev->readChunkWithTagsFromNAND &&
5866 dev->writeChunkToNAND &&
5867 dev->readChunkFromNAND &&
5868 !dev->markNANDBlockBad &&
5869 !dev->queryNANDBlock) return 1;
5875 int yaffs_GutsInitialise(yaffs_Device *dev)
5882 T(YAFFS_TRACE_ALWAYS,(TSTR("yaffs: yaffs_GutsInitialise()" TENDSTR)));
5883 // Check stuff that must be set
5887 T(YAFFS_TRACE_ALWAYS,(TSTR("yaffs: Need a device" TENDSTR)));
5891 dev->internalStartBlock = dev->startBlock;
5892 dev->internalEndBlock = dev->endBlock;
5893 dev->blockOffset = 0;
5894 dev->chunkOffset = 0;
5895 dev->nFreeChunks = 0;
5897 if(dev->startBlock == 0)
5899 dev->internalStartBlock = dev->startBlock + 1;
5900 dev->internalEndBlock = dev->endBlock + 1;
5901 dev->blockOffset = 1;
5902 dev->chunkOffset = dev->nChunksPerBlock;
5905 // Check geometry parameters.
5907 if( (dev->isYaffs2 && dev->nBytesPerChunk <1024) ||
5908 (!dev->isYaffs2 && dev->nBytesPerChunk !=512) ||
5909 dev->nChunksPerBlock < 2 ||
5910 dev->nReservedBlocks < 2 ||
5911 dev->internalStartBlock <= 0 ||
5912 dev->internalEndBlock <= 0 ||
5913 dev->internalEndBlock <= (dev->internalStartBlock + dev->nReservedBlocks + 2) // otherwise it is too small
5916 T(YAFFS_TRACE_ALWAYS,(TSTR("yaffs: NAND geometry problems: chunk size %d, type is yaffs%s " TENDSTR),
5917 dev->nBytesPerChunk, dev->isYaffs2 ? "2" : ""));
5921 if(yaffs_InitialiseNAND(dev) != YAFFS_OK)
5923 T(YAFFS_TRACE_ALWAYS,(TSTR("yaffs: InitialiseNAND failed" TENDSTR)));
5927 // Got the right mix of functions?
5929 if(!yaffs_CheckDevFunctions(dev))
5932 T(YAFFS_TRACE_ALWAYS,(TSTR("yaffs: device function(s) missing or wrong\n" TENDSTR)));
5937 // This is really a compilation check.
5938 if(!yaffs_CheckStructures())
5940 T(YAFFS_TRACE_ALWAYS,(TSTR("yaffs_CheckStructures failed\n" TENDSTR)));
5946 T(YAFFS_TRACE_ALWAYS,(TSTR("yaffs: device already mounted\n" TENDSTR)));
5952 // Finished with most checks. One or two more checks happen later on too.
5958 nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1;
5962 // OK now calculate a few things for the device
5963 // Calculate chunkGroupBits.
5964 // We need to find the next power of 2 > than internalEndBlock
5966 x = dev->nChunksPerBlock * (dev->internalEndBlock+1);
5968 for(bits = extraBits = 0; x > 1; bits++)
5970 if(x & 1) extraBits++;
5974 if(extraBits > 0) bits++;
5977 // Level0 Tnodes are 16 bits, so if the bitwidth of the
5978 // chunk range we're using is greater than 16 we need
5979 // to figure out chunk shift and chunkGroupSize
5982 dev->chunkGroupBits = 0;
5986 dev->chunkGroupBits = bits - 16;
5989 dev->chunkGroupSize = 1 << dev->chunkGroupBits;
5991 if(dev->nChunksPerBlock < dev->chunkGroupSize)
5993 // We have a problem because the soft delete won't work if
5994 // the chunk group size > chunks per block.
5995 // This can be remedied by using larger "virtual blocks".
5996 T(YAFFS_TRACE_ALWAYS,(TSTR("yaffs: chunk group too large\n" TENDSTR)));
6002 // OK, we've finished verifying the device, lets continue with initialisation
6004 // More device initialisation
6005 dev->garbageCollections = 0;
6006 dev->passiveGarbageCollections = 0;
6007 dev->currentDirtyChecker = 0;
6008 dev->bufferedBlock = -1;
6009 dev->doingBufferedBlockRewrite = 0;
6010 dev->nDeletedFiles = 0;
6011 dev->nBackgroundDeletions=0;
6012 dev->nUnlinkedFiles = 0;
6015 dev->tagsEccFixed=0;
6016 dev->tagsEccUnfixed=0;
6017 dev->nErasureFailures = 0;
6018 dev->nErasedBlocks = 0;
6021 //dev->localBuffer = YMALLOC(dev->nBytesPerChunk);
6022 // Initialise temporary buffers
6025 for(i = 0; i < YAFFS_N_TEMP_BUFFERS; i++)
6027 dev->tempBuffer[i].line = 0; // not in use
6028 dev->tempBuffer[i].buffer = YMALLOC(dev->nBytesPerChunk);
6034 yaffs_InitialiseBlocks(dev,nBlocks);
6036 yaffs_InitialiseTnodes(dev);
6038 yaffs_InitialiseObjects(dev);
6040 dev->gcCleanupList = YMALLOC(dev->nChunksPerBlock * sizeof(__u32));
6042 if(dev->nShortOpCaches > 0)
6046 if(dev->nShortOpCaches > YAFFS_MAX_SHORT_OP_CACHES)
6048 dev->nShortOpCaches = YAFFS_MAX_SHORT_OP_CACHES;
6051 dev->srCache = YMALLOC( dev->nShortOpCaches * sizeof(yaffs_ChunkCache));
6053 for(i=0; i < dev->nShortOpCaches; i++)
6055 dev->srCache[i].object = NULL;
6056 dev->srCache[i].lastUse = 0;
6057 dev->srCache[i].dirty = 0;
6058 dev->srCache[i].data = YMALLOC(dev->nBytesPerChunk);
6066 // Initialise the unlinked, root and lost and found directories
6067 dev->lostNFoundDir = dev->rootDir = dev->unlinkedDir = dev->deletedDir = NULL;
6069 dev->unlinkedDir = yaffs_CreateFakeDirectory(dev,YAFFS_OBJECTID_UNLINKED, S_IFDIR);
6070 dev->deletedDir = yaffs_CreateFakeDirectory(dev,YAFFS_OBJECTID_DELETED, S_IFDIR);
6072 dev->rootDir = yaffs_CreateFakeDirectory(dev,YAFFS_OBJECTID_ROOT,YAFFS_ROOT_MODE | S_IFDIR);
6073 dev->lostNFoundDir = yaffs_CreateFakeDirectory(dev,YAFFS_OBJECTID_LOSTNFOUND,YAFFS_LOSTNFOUND_MODE | S_IFDIR);
6074 yaffs_AddObjectToDirectory(dev->rootDir,dev->lostNFoundDir);
6078 dev->useHeaderFileSize = 1;
6081 // Now scan the flash.
6084 yaffs_ScanBackwards(dev);
6089 dev->nPageReads = 0;
6090 dev->nPageWrites = 0;
6091 dev->nBlockErasures = 0;
6093 dev->nRetriedWrites = 0;
6095 dev->nRetiredBlocks = 0;
6097 yaffs_VerifyFreeChunks(dev);
6099 T(YAFFS_TRACE_ALWAYS,(TSTR("yaffs: yaffs_GutsInitialise() done.\n" TENDSTR)));
6104 void yaffs_Deinitialise(yaffs_Device *dev)
6110 yaffs_DeinitialiseBlocks(dev);
6111 yaffs_DeinitialiseTnodes(dev);
6112 yaffs_DeinitialiseObjects(dev);
6113 if(dev->nShortOpCaches > 0)
6116 for(i=0; i < dev->nShortOpCaches; i++)
6118 YFREE(dev->srCache[i].data);
6121 YFREE(dev->srCache);
6124 YFREE(dev->gcCleanupList);
6126 for(i = 0; i < YAFFS_N_TEMP_BUFFERS; i++)
6128 YFREE(dev->tempBuffer[i].buffer);
6138 int yaffs_GetNumberOfFreeChunks(yaffs_Device *dev)
6140 int nFree = dev->nFreeChunks - (dev->nChunksPerBlock * YAFFS_RESERVED_BLOCKS);
6142 struct list_head *i;
6146 // To the free chunks add the chunks that are in the deleted unlinked files.
6147 list_for_each(i,&dev->deletedDir->variant.directoryVariant.children)
6149 l = list_entry(i, yaffs_Object,siblings);
6153 nFree += l->nDataChunks;
6158 // printf("___________ nFreeChunks is %d nFree is %d\n",dev->nFreeChunks,nFree);
6160 if(nFree < 0) nFree = 0;
6168 static int yaffs_CountFreeChunks(yaffs_Device *dev)
6173 yaffs_BlockInfo *blk;
6176 for(nFree = 0, b = dev->internalStartBlock; b <= dev->internalEndBlock; b++)
6178 blk = yaffs_GetBlockInfo(dev,b);
6180 switch(blk->blockState)
6182 case YAFFS_BLOCK_STATE_EMPTY:
6183 case YAFFS_BLOCK_STATE_ALLOCATING:
6184 case YAFFS_BLOCK_STATE_COLLECTING:
6185 case YAFFS_BLOCK_STATE_FULL: nFree += (dev->nChunksPerBlock - blk->pagesInUse + blk->softDeletions); break;
6196 int yaffs_GetNumberOfFreeChunks(yaffs_Device *dev)
6198 // This is what we report to the outside world
6201 int nDirtyCacheChunks;
6204 nFree = dev->nFreeChunks;
6206 nFree = yaffs_CountFreeChunks(dev);
6209 // Now count the number of dirty chunks in the cache and subtract those
6213 for( nDirtyCacheChunks = 0,i = 0; i < dev->nShortOpCaches; i++)
6215 if(dev->srCache[i].dirty) nDirtyCacheChunks++;
6219 nFree -= nDirtyCacheChunks;
6221 nFree -= ((dev->nReservedBlocks + 1) * dev->nChunksPerBlock);
6223 if(nFree < 0) nFree = 0;
6229 static int yaffs_freeVerificationFailures;
6231 static void yaffs_VerifyFreeChunks(yaffs_Device *dev)
6233 int counted = yaffs_CountFreeChunks(dev);
6235 int difference = dev->nFreeChunks - counted;
6239 T(YAFFS_TRACE_ALWAYS,(TSTR("Freechunks verification failure %d %d %d" TENDSTR),dev->nFreeChunks,counted,difference));
6240 yaffs_freeVerificationFailures++;
6244 /////////////////// YAFFS test code //////////////////////////////////
6246 #define yaffs_CheckStruct(structure,syze, name) \
6247 if(sizeof(structure) != syze) \
6249 T(YAFFS_TRACE_ALWAYS,(TSTR("%s should be %d but is %d\n" TENDSTR),name,syze,sizeof(structure))); \
6250 return YAFFS_FAIL; \
6254 static int yaffs_CheckStructures(void)
6256 // yaffs_CheckStruct(yaffs_Tags,8,"yaffs_Tags")
6257 // yaffs_CheckStruct(yaffs_TagsUnion,8,"yaffs_TagsUnion")
6258 // yaffs_CheckStruct(yaffs_Spare,16,"yaffs_Spare")
6259 #ifndef CONFIG_YAFFS_TNODE_LIST_DEBUG
6260 yaffs_CheckStruct(yaffs_Tnode,2* YAFFS_NTNODES_LEVEL0,"yaffs_Tnode")
6262 yaffs_CheckStruct(yaffs_ObjectHeader,512,"yaffs_ObjectHeader")
6269 void yaffs_GutsTest(yaffs_Device *dev)
6272 if(yaffs_CheckStructures() != YAFFS_OK)
6274 T(YAFFS_TRACE_ALWAYS,(TSTR("One or more structures malformed-- aborting\n" TENDSTR)));
6278 yaffs_TnodeTest(dev);
6279 yaffs_ObjectTest(dev);