X-Git-Url: http://www.aleph1.co.uk/gitweb/?p=yaffs2.git;a=blobdiff_plain;f=yaffs_guts.c;h=87afa2205f3e61c1e76aaf69df32fdc27f91e84f;hp=e87109bd353fc3943fd622cf4ba31cb2fd76e27d;hb=21283903b8863d2c27d1320c0f6a1c1ea0c90ef3;hpb=6a4a7bfdb19f0d608d85f0103f90c6bbd265bf58 diff --git a/yaffs_guts.c b/yaffs_guts.c index e87109b..87afa22 100644 --- a/yaffs_guts.c +++ b/yaffs_guts.c @@ -1,24 +1,27 @@ + /* - * YAFFS: Yet another FFS. A NAND-flash specific file system. - * yaffs_guts.c The main guts of YAFFS + * YAFFS: Yet another FFS. A NAND-flash specific file system. * * Copyright (C) 2002 Aleph One Ltd. * for Toby Churchill Ltd and Brightstar Engineering * * Created by Charles Manning * + * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * */ //yaffs_guts.c -const char *yaffs_guts_c_version="$Id: yaffs_guts.c,v 1.2 2004-11-16 02:36:15 charles Exp $"; +const char *yaffs_guts_c_version="$Id: yaffs_guts.c,v 1.8 2005-07-05 23:54:59 charles Exp $"; #include "yportenv.h" #include "yaffsinterface.h" #include "yaffs_guts.h" +#include "yaffs_tagsvalidity.h" + #include "yaffs_tagscompat.h" @@ -40,6 +43,7 @@ int nand_correct_data (u_char *dat, u_char *read_ecc, u_char *calc_ecc); #include "yaffs_ecc.h" #endif +#if 0 // countBits is a quick way of counting the number of bits in a byte. // ie. countBits[n] holds the number of 1 bits in a byte with the value n. @@ -70,6 +74,8 @@ static int yaffs_CountBits(__u8 x) return retVal; } +#endif + #if 0 // Stuff using yea olde tags @@ -90,7 +96,9 @@ static Y_INLINE int yaffs_MarkBlockBad(yaffs_Device *dev, int blockNo); static Y_INLINE int yaffs_QueryInitialBlockState(yaffs_Device *dev,int blockNo, yaffs_BlockState *state,unsigned *sequenceNumber); // Local prototypes static int yaffs_WriteNewChunkWithTagsToNAND(yaffs_Device *dev, const __u8 *buffer, yaffs_ExtendedTags *tags, int useReserve); +#if 0 static int yaffs_CheckObjectHashSanity(yaffs_Device *dev); +#endif static int yaffs_PutChunkIntoFile(yaffs_Object *in,int chunkInInode, int chunkInNAND, int inScan); static yaffs_Object *yaffs_CreateNewObject(yaffs_Device *dev,int number,yaffs_ObjectType type); @@ -107,11 +115,11 @@ static __u8 *yaffs_GetTempBuffer(yaffs_Device *dev,int lineNo); static void yaffs_ReleaseTempBuffer(yaffs_Device *dev, __u8 *buffer, int lineNo); -static int yaffs_ValidateTags(yaffs_ExtendedTags *tags); - // Robustification (if it ever comes about...) static void yaffs_RetireBlock(yaffs_Device *dev,int blockInNAND); +#if 0 static void yaffs_HandleReadDataError(yaffs_Device *dev,int chunkInNAND); +#endif static void yaffs_HandleWriteChunkError(yaffs_Device *dev,int chunkInNAND); static void yaffs_HandleWriteChunkOk(yaffs_Device *dev,int chunkInNAND,const __u8 *data, const yaffs_ExtendedTags *tags); static void yaffs_HandleUpdateChunk(yaffs_Device *dev,int chunkInNAND, const yaffs_ExtendedTags *tags); @@ -144,6 +152,8 @@ static void yaffs_InvalidateChunkCache(yaffs_Object *object, int chunkId); static int yaffs_ReadChunkWithTagsFromNAND(yaffs_Device *dev,int chunkInNAND, __u8 *buffer, yaffs_ExtendedTags *tags) { + chunkInNAND -= dev->chunkOffset; + if(dev->readChunkWithTagsFromNAND) return dev->readChunkWithTagsFromNAND(dev,chunkInNAND,buffer,tags); else @@ -152,6 +162,8 @@ static int yaffs_ReadChunkWithTagsFromNAND(yaffs_Device *dev,int chunkInNAND, __ static Y_INLINE int yaffs_WriteChunkWithTagsToNAND(yaffs_Device *dev,int chunkInNAND, const __u8 *buffer, yaffs_ExtendedTags *tags) { + chunkInNAND -= dev->chunkOffset; + if(tags) { tags->sequenceNumber = dev->sequenceNumber; @@ -177,6 +189,8 @@ static Y_INLINE int yaffs_WriteChunkWithTagsToNAND(yaffs_Device *dev,int chunkIn static Y_INLINE int yaffs_MarkBlockBad(yaffs_Device *dev, int blockNo) { + blockNo -= dev->blockOffset; + if(dev->markNANDBlockBad) return dev->markNANDBlockBad(dev,blockNo); else @@ -184,6 +198,8 @@ static Y_INLINE int yaffs_MarkBlockBad(yaffs_Device *dev, int blockNo) } static Y_INLINE int yaffs_QueryInitialBlockState(yaffs_Device *dev,int blockNo, yaffs_BlockState *state, unsigned *sequenceNumber) { + blockNo -= dev->blockOffset; + if(dev->queryNANDBlock) return dev->queryNANDBlock(dev,blockNo,state,sequenceNumber); else @@ -193,6 +209,8 @@ static Y_INLINE int yaffs_QueryInitialBlockState(yaffs_Device *dev,int blockNo, int yaffs_EraseBlockInNAND(struct yaffs_DeviceStruct *dev,int blockInNAND) { int result; + + blockInNAND -= dev->blockOffset; dev->nBlockErasures++; result = dev->eraseBlockInNAND(dev,blockInNAND); @@ -201,7 +219,7 @@ int yaffs_EraseBlockInNAND(struct yaffs_DeviceStruct *dev,int blockInNAND) return result; } -int yaffs_InitialiseNAND(struct yaffs_DeviceStruct *dev) +static int yaffs_InitialiseNAND(struct yaffs_DeviceStruct *dev) { return dev->initialiseNAND(dev); } @@ -271,12 +289,12 @@ static void yaffs_ReleaseTempBuffer(yaffs_Device *dev, __u8 *buffer, int lineNo) static Y_INLINE __u8 *yaffs_BlockBits(yaffs_Device *dev, int blk) { - if(blk < dev->startBlock || blk > dev->endBlock) + if(blk < dev->internalStartBlock || blk > dev->internalEndBlock) { T(YAFFS_TRACE_ERROR,(TSTR("**>> yaffs: BlockBits block %d is not valid" TENDSTR),blk)); YBUG(); } - return dev->chunkBits + (dev->chunkBitmapStride * (blk - dev->startBlock)); + return dev->chunkBits + (dev->chunkBitmapStride * (blk - dev->internalStartBlock)); } static Y_INLINE void yaffs_ClearChunkBits(yaffs_Device *dev,int blk) @@ -318,19 +336,6 @@ static Y_INLINE int yaffs_StillSomeChunkBits(yaffs_Device *dev,int blk) return 0; } -#if 0 -// Function to manipulate block info -static Y_INLINE yaffs_BlockInfo* yaffs_GetBlockInfo(yaffs_Device *dev, int blk) -{ - if(blk < dev->startBlock || blk > dev->endBlock) - { - T(YAFFS_TRACE_ERROR,(TSTR("**>> yaffs: getBlockInfo block %d is not valid" TENDSTR),blk)); - YBUG(); - } - return &dev->blockInfo[blk - dev->startBlock]; -} -#endif - static Y_INLINE int yaffs_HashFunction(int n) { @@ -348,125 +353,6 @@ yaffs_Object *yaffs_LostNFound(yaffs_Device *dev) return dev->lostNFoundDir; } -#if 0 -static int yaffs_WriteChunkToNAND(struct yaffs_DeviceStruct *dev,int chunkInNAND, const __u8 *data, yaffs_Spare *spare) -{ - if(chunkInNAND < dev->startBlock * dev->nChunksPerBlock) - { - T(YAFFS_TRACE_ERROR,(TSTR("**>> yaffs chunk %d is not valid" TENDSTR),chunkInNAND)); - return YAFFS_FAIL; - } - - dev->nPageWrites++; - return dev->writeChunkToNAND(dev,chunkInNAND,data,spare); -} - - - -static int yaffs_ReadChunkFromNAND(struct yaffs_DeviceStruct *dev, - int chunkInNAND, - __u8 *data, - yaffs_Spare *spare, - int doErrorCorrection) -{ - int retVal; - yaffs_Spare localSpare; - - dev->nPageReads++; - - - - - if(!spare && data) - { - // If we don't have a real spare, then we use a local one. - // Need this for the calculation of the ecc - spare = &localSpare; - } - - - if(!dev->useNANDECC) - { - retVal = dev->readChunkFromNAND(dev,chunkInNAND,data,spare); - if(data && doErrorCorrection) - { - // Do ECC correction - //Todo handle any errors - int eccResult1,eccResult2; - __u8 calcEcc[3]; - - yaffs_ECCCalculate(data,calcEcc); - eccResult1 = yaffs_ECCCorrect (data,spare->ecc1, calcEcc); - yaffs_ECCCalculate(&data[256],calcEcc); - eccResult2 = yaffs_ECCCorrect(&data[256],spare->ecc2, calcEcc); - - if(eccResult1>0) - { - T(YAFFS_TRACE_ERROR, (TSTR("**>>ecc error fix performed on chunk %d:0" TENDSTR),chunkInNAND)); - dev->eccFixed++; - } - else if(eccResult1<0) - { - T(YAFFS_TRACE_ERROR,(TSTR("**>>ecc error unfixed on chunk %d:0" TENDSTR),chunkInNAND)); - dev->eccUnfixed++; - } - - if(eccResult2>0) - { - T(YAFFS_TRACE_ERROR,(TSTR("**>>ecc error fix performed on chunk %d:1" TENDSTR),chunkInNAND)); - dev->eccFixed++; - } - else if(eccResult2<0) - { - T(YAFFS_TRACE_ERROR,(TSTR("**>>ecc error unfixed on chunk %d:1" TENDSTR),chunkInNAND)); - dev->eccUnfixed++; - } - - if(eccResult1 || eccResult2) - { - // Hoosterman, we had a data problem on this page - yaffs_HandleReadDataError(dev,chunkInNAND); - } - } - } - else - { - // Must allocate enough memory for spare+2*sizeof(int) for ecc results from device. - struct yaffs_NANDSpare nspare; - retVal = dev->readChunkFromNAND(dev,chunkInNAND,data,(yaffs_Spare*)&nspare); - memcpy (spare, &nspare, sizeof(yaffs_Spare)); - if(data && doErrorCorrection) - { - if(nspare.eccres1>0) - { - T(YAFFS_TRACE_ERROR,(TSTR("**>>ecc error fix performed on chunk %d:0" TENDSTR),chunkInNAND)); - } - else if(nspare.eccres1<0) - { - T(YAFFS_TRACE_ERROR,(TSTR("**>>ecc error unfixed on chunk %d:0" TENDSTR),chunkInNAND)); - } - - if(nspare.eccres2>0) - { - T(YAFFS_TRACE_ERROR,(TSTR("**>>ecc error fix performed on chunk %d:1" TENDSTR),chunkInNAND)); - } - else if(nspare.eccres2<0) - { - T(YAFFS_TRACE_ERROR,(TSTR("**>>ecc error unfixed on chunk %d:1" TENDSTR),chunkInNAND)); - } - - if(nspare.eccres1 || nspare.eccres2) - { - // Hoosterman, we had a data problem on this page - yaffs_HandleReadDataError(dev,chunkInNAND); - } - - } - } - return retVal; -} - -#endif @@ -475,7 +361,8 @@ int yaffs_CheckFF(__u8 *buffer,int nBytes) //Horrible, slow implementation while(nBytes--) { - if(*buffer != 0xFF) return 0; + if(*buffer != 0xFF) return 0; + buffer++; } return 1; } @@ -487,7 +374,8 @@ static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,int chunkInNAND __u8 *data = yaffs_GetTempBuffer(dev,__LINE__); yaffs_ExtendedTags tags; - dev->readChunkWithTagsFromNAND(dev,chunkInNAND,data,&tags); +// NCB dev->readChunkWithTagsFromNAND(dev,chunkInNAND,data,&tags); + yaffs_ReadChunkWithTagsFromNAND(dev,chunkInNAND,data,&tags); if(!yaffs_CheckFF(data,dev->nBytesPerChunk) || tags.chunkUsed) { @@ -577,7 +465,7 @@ static void yaffs_RetireBlock(yaffs_Device *dev,int blockInNAND) } - +#if 0 static int yaffs_RewriteBufferedBlock(yaffs_Device *dev) { dev->doingBufferedBlockRewrite = 1; @@ -611,6 +499,8 @@ static void yaffs_CheckWrittenBlock(yaffs_Device *dev,int chunkInNAND) { } +#endif + static void yaffs_HandleWriteChunkOk(yaffs_Device *dev,int chunkInNAND,const __u8 *data, const yaffs_ExtendedTags *tags) { } @@ -1709,6 +1599,12 @@ yaffs_Object *yaffs_FindObjectByNumber(yaffs_Device *dev,__u32 number) in = list_entry(i, yaffs_Object,hashLink); if(in->objectId == number) { +#ifdef __KERNEL__ + // Don't tell the VFS about this one if it is defered free + if(in->deferedFree) + return NULL; +#endif + return in; } } @@ -1753,6 +1649,7 @@ yaffs_Object *yaffs_CreateNewObject(yaffs_Device *dev,int number,yaffs_ObjectTyp case YAFFS_OBJECT_TYPE_FILE: theObject->variant.fileVariant.fileSize = 0; theObject->variant.fileVariant.scannedFileSize = 0; + theObject->variant.fileVariant.shrinkSize = 0xFFFFFFFF; // max __u32 theObject->variant.fileVariant.topLevel = 0; theObject->variant.fileVariant.top = yaffs_GetTnode(dev); break; @@ -1908,7 +1805,7 @@ yaffs_Object *yaffs_MknodDirectory(yaffs_Object *parent,const YCHAR *name, __u32 yaffs_Object *yaffs_MknodSpecial(yaffs_Object *parent,const YCHAR *name, __u32 mode, __u32 uid, __u32 gid, __u32 rdev) { - return yaffs_MknodObject(YAFFS_OBJECT_TYPE_DIRECTORY,parent,name,mode,uid,gid,NULL,NULL,rdev); + return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SPECIAL,parent,name,mode,uid,gid,NULL,NULL,rdev); } yaffs_Object *yaffs_MknodSymLink(yaffs_Object *parent,const YCHAR *name, __u32 mode, __u32 uid, __u32 gid,const YCHAR *alias) @@ -1943,6 +1840,12 @@ static int yaffs_ChangeObjectName(yaffs_Object *obj, yaffs_Object *newDir, const { newDir = obj->parent; // use the old directory } + + if(newDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) + { + T(YAFFS_TRACE_ALWAYS,(TSTR("tragendy: yaffs_ChangeObjectName: newDir is not a directory"TENDSTR))); + YBUG(); + } // TODO: Do we need this different handling for YAFFS2 and YAFFS1?? if(obj->myDev->isYaffs2) @@ -1972,7 +1875,7 @@ static int yaffs_ChangeObjectName(yaffs_Object *obj, yaffs_Object *newDir, const if(unlinkOp) obj->unlinked = 1; - // If it is a dletion then we mark it as a shrink for gc purposes. + // If it is a deletion then we mark it as a shrink for gc purposes. if(yaffs_UpdateObjectHeader(obj,newName,0,deleteOp) >= 0) { return YAFFS_OK; @@ -2008,6 +1911,7 @@ int yaffs_RenameObject(yaffs_Object *oldDir, const YCHAR *oldName, yaffs_Object } +#if 0 static int yaffs_CheckObjectHashSanity(yaffs_Device *dev) { @@ -2037,7 +1941,7 @@ static int yaffs_CheckObjectHashSanity(yaffs_Device *dev) return ok; } -#if 0 + void yaffs_ObjectTest(yaffs_Device *dev) { yaffs_Object *in[1000]; @@ -2144,7 +2048,7 @@ static int yaffs_BlockNotDisqualifiedFromGC(yaffs_Device *dev, yaffs_BlockInfo * { seq = dev->sequenceNumber; - for(i = dev->startBlock; i <= dev->endBlock; i++) + for(i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) { b = yaffs_GetBlockInfo(dev,i); if(b->blockState == YAFFS_BLOCK_STATE_FULL && @@ -2201,11 +2105,11 @@ static int yaffs_FindBlockForGarbageCollection(yaffs_Device *dev,int aggressive) pagesInUse = (aggressive)? dev->nChunksPerBlock : YAFFS_PASSIVE_GC_CHUNKS + 1; if(aggressive) { - iterations = dev->endBlock - dev->startBlock + 1; + iterations = dev->internalEndBlock - dev->internalStartBlock + 1; } else { - iterations = dev->endBlock - dev->startBlock + 1; + iterations = dev->internalEndBlock - dev->internalStartBlock + 1; iterations = iterations / 16; if(iterations > 200) { @@ -2216,12 +2120,12 @@ static int yaffs_FindBlockForGarbageCollection(yaffs_Device *dev,int aggressive) for(i = 0; i <= iterations && pagesInUse > 0 ; i++) { b++; - if ( b < dev->startBlock || b > dev->endBlock) + if ( b < dev->internalStartBlock || b > dev->internalEndBlock) { - b = dev->startBlock; + b = dev->internalStartBlock; } - if(b < dev->startBlock || b > dev->endBlock) + if(b < dev->internalStartBlock || b > dev->internalEndBlock) { T(YAFFS_TRACE_ERROR,(TSTR("**>> Block %d is not valid" TENDSTR),b)); YBUG(); @@ -2307,12 +2211,13 @@ static void yaffs_BlockBecameDirty(yaffs_Device *dev,int blockNo) } } +#if 0 static void yaffs_DumpBlockStats(yaffs_Device *dev) { int i,j; yaffs_BlockInfo *bi; - for(i= dev->startBlock; i <=dev->endBlock; i++) + for(i= dev->internalStartBlock; i <=dev->internalEndBlock; i++) { bi = yaffs_GetBlockInfo(dev,i); T(YAFFS_TRACE_ALLOCATE,(TSTR("%3d state %d shrink %d inuse %d/%d seq %d pages"),i, @@ -2330,6 +2235,7 @@ static void yaffs_DumpBlockStats(yaffs_Device *dev) } } +#endif static int yaffs_FindBlockForAllocation(yaffs_Device *dev) @@ -2360,12 +2266,12 @@ static int yaffs_FindBlockForAllocation(yaffs_Device *dev) // Find an empty block. - for(i = dev->startBlock; i <= dev->endBlock; i++) + for(i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) { dev->allocationBlockFinder++; - if(dev->allocationBlockFinder < dev->startBlock || dev->allocationBlockFinder> dev->endBlock) + if(dev->allocationBlockFinder < dev->internalStartBlock || dev->allocationBlockFinder> dev->internalEndBlock) { - dev->allocationBlockFinder = dev->startBlock; + dev->allocationBlockFinder = dev->internalStartBlock; } bi = yaffs_GetBlockInfo(dev,dev->allocationBlockFinder); @@ -2376,11 +2282,16 @@ static int yaffs_FindBlockForAllocation(yaffs_Device *dev) dev->sequenceNumber++; bi->sequenceNumber = dev->sequenceNumber; dev->nErasedBlocks--; - T(YAFFS_TRACE_ALLOCATE,(TSTR("Allocated block %d, seq %d" TENDSTR),dev->allocationBlockFinder,dev->sequenceNumber)); + T(YAFFS_TRACE_ALLOCATE,(TSTR("Allocated block %d, seq %d, %d left" TENDSTR),dev->allocationBlockFinder,dev->sequenceNumber, dev->nErasedBlocks)); return dev->allocationBlockFinder; } } - T(YAFFS_TRACE_ERROR, (TSTR("yaffs tragedy: no more eraased blocks, but there should have been one" TENDSTR))); + + + T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs tragedy: no more eraased blocks, but there should have been %d" TENDSTR),dev->nErasedBlocks)); + + + return -1; @@ -2689,38 +2600,7 @@ static void yaffs_DoUnlinkedFileDeletion(yaffs_Device *dev) #endif -#if 0 -#define YAFFS_GARBAGE_COLLECT_LOW_WATER 2 -static int yaffs_CheckGarbageCollection(yaffs_Device *dev) -{ - int block; - int aggressive=0; - - //yaffs_DoUnlinkedFileDeletion(dev); - - if(dev->nErasedBlocks <= (dev->nReservedBlocks + YAFFS_GARBAGE_COLLECT_LOW_WATER)) - { - aggressive = 1; - } - - if(aggressive) - { - block = yaffs_FindBlockForGarbageCollection(dev,aggressive); - - if(block >= 0) - { - dev->garbageCollections++; - return yaffs_GarbageCollectBlock(dev,block); - } - else - { - return YAFFS_FAIL; - } - } - return YAFFS_OK; -} -#endif // New garbage collector // If we're very low on erased blocks then we do aggressive garbage collection @@ -2784,19 +2664,6 @@ int yaffs_CheckGarbageCollection(yaffs_Device *dev) //////////////////////////// TAGS /////////////////////////////////////// -void yaffs_InitialiseTags(yaffs_ExtendedTags *tags) -{ - memset(tags,0,sizeof(yaffs_ExtendedTags)); - tags->validMarker0 = 0xAAAAAAAA; - tags->validMarker1 = 0x55555555; -} - -static int yaffs_ValidateTags(yaffs_ExtendedTags *tags) -{ - return (tags->validMarker0 == 0xAAAAAAAA && tags->validMarker1 == 0x55555555); - -} - #if 0 @@ -2943,6 +2810,7 @@ static int yaffs_TagsMatch(const yaffs_ExtendedTags *tags, int objectId, int chu } +///////////////////////////////////////////////////////////////////////////////////////////////////////// int yaffs_FindChunkInFile(yaffs_Object *in,int chunkInInode,yaffs_ExtendedTags *tags) @@ -3086,12 +2954,27 @@ static int yaffs_CheckFileSanity(yaffs_Object *in) static int yaffs_PutChunkIntoFile(yaffs_Object *in,int chunkInInode, int chunkInNAND, int inScan) { + // NB inScan is zero unless scanning. For forward scanning, inScan is > 0; for backward scanning inScan is < 0 yaffs_Tnode *tn; yaffs_Device *dev = in->myDev; int existingChunk; yaffs_ExtendedTags existingTags; yaffs_ExtendedTags newTags; unsigned existingSerial, newSerial; + + if(in->variantType != YAFFS_OBJECT_TYPE_FILE) + { + // Just ignore an attempt at putting a chunk into a non-file during scanning + // If it is not during Scanning then something went wrong! + if(!inScan) + { + T(YAFFS_TRACE_ERROR, (TSTR("yaffs tragedy:attempt to put data chunk into a non-file" TENDSTR))); + YBUG(); + } + + yaffs_DeleteChunk(dev,chunkInNAND,1,__LINE__); + return YAFFS_OK; + } tn = yaffs_AddOrFindLevel0Tnode(dev,&in->variant.fileVariant, chunkInInode); if(!tn) @@ -3101,12 +2984,16 @@ static int yaffs_PutChunkIntoFile(yaffs_Object *in,int chunkInInode, int chunkIn existingChunk = tn->level0[chunkInInode & YAFFS_TNODES_LEVEL0_MASK]; - if(inScan) + if(inScan != 0) { // If we're scanning then we need to test for duplicates // NB This does not need to be efficient since it should only ever // happen when the power fails during a write, then only one // chunk should ever be affected. + // + // Correction for YAFFS2: This could happen quite a lot and we need to think about efficiency! TODO + // Update: For backward scanning we don't need to re-read tags so this is quite cheap. + if(existingChunk != 0) @@ -3114,13 +3001,23 @@ static int yaffs_PutChunkIntoFile(yaffs_Object *in,int chunkInInode, int chunkIn // NB Right now existing chunk will not be real chunkId if the device >= 32MB // thus we have to do a FindChunkInFile to get the real chunk id. // - // We have a duplicate now we need to decide which one to use - // To do this we get both sets of tags and compare serial numbers. - yaffs_ReadChunkWithTagsFromNAND(dev,chunkInNAND, NULL,&newTags); + // We have a duplicate now we need to decide which one to use: + // + // Backwards scanning YAFFS2: The old one is what we use, dump the new one. + // Forward scanning YAFFS2: The new one is what we use, dump the old one. + // YAFFS1: Get both sets of tags and compare serial numbers. + // + // + + if(inScan > 0) + { + // Only do this for forward scanning + yaffs_ReadChunkWithTagsFromNAND(dev,chunkInNAND, NULL,&newTags); - // Do a proper find - existingChunk = yaffs_FindChunkInFile(in,chunkInInode, &existingTags); + // Do a proper find + existingChunk = yaffs_FindChunkInFile(in,chunkInInode, &existingTags); + } if(existingChunk <=0) { @@ -3137,16 +3034,19 @@ static int yaffs_PutChunkIntoFile(yaffs_Object *in,int chunkInInode, int chunkIn newSerial = newTags.serialNumber; existingSerial = existingTags.serialNumber; - if( in->myDev->isYaffs2 || - existingChunk <= 0 || - ((existingSerial+1) & 3) == newSerial) + if( (inScan > 0) && + ( in->myDev->isYaffs2 || + existingChunk <= 0 || + ((existingSerial+1) & 3) == newSerial)) { + // Forward scanning. // Use new // Delete the old one and drop through to update the tnode yaffs_DeleteChunk(dev,existingChunk,1,__LINE__); } else { + // Backward scanning or we want to use the existing one // Use existing. // Delete the new one and return early so that the tnode isn't changed yaffs_DeleteChunk(dev,chunkInNAND,1,__LINE__); @@ -3410,7 +3310,8 @@ int yaffs_UpdateObjectHeader(yaffs_Object *in,const YCHAR *name, int force,int i // Should not happen break; case YAFFS_OBJECT_TYPE_FILE: - oh->fileSize = in->variant.fileVariant.fileSize; + oh->fileSize = (oh->parentObjectId == YAFFS_OBJECTID_DELETED || + oh->parentObjectId == YAFFS_OBJECTID_UNLINKED) ? 0 : in->variant.fileVariant.fileSize; break; case YAFFS_OBJECT_TYPE_HARDLINK: oh->equivalentObjectId = in->variant.hardLinkVariant.equivalentObjectId; @@ -3433,8 +3334,16 @@ int yaffs_UpdateObjectHeader(yaffs_Object *in,const YCHAR *name, int force,int i newTags.chunkId = 0; newTags.objectId = in->objectId; newTags.serialNumber = in->serial; - - + + // Add extra info for file header + + newTags.extraHeaderInfoAvailable = 1; + newTags.extraParentObjectId = oh->parentObjectId; + newTags.extraFileLength = oh->fileSize; + newTags.extraIsShrinkHeader = oh->isShrink; + newTags.extraEquivalentObjectId = oh->equivalentObjectId; + newTags.extraObjectType = in->variantType; + // Create new chunk in NAND newChunkId = yaffs_WriteNewChunkWithTagsToNAND(dev,buffer,&newTags, (prevChunkId >= 0) ? 1 : 0 ); @@ -3489,7 +3398,7 @@ static void yaffs_FlushFilesChunkCache(yaffs_Object *obj) int lowest; int i; yaffs_ChunkCache *cache; - int chunkWritten; + int chunkWritten = 0; //int nBytes; int nCaches = obj->myDev->nShortOpCaches; @@ -3620,11 +3529,14 @@ static yaffs_ChunkCache *yaffs_GrabChunkCache(yaffs_Device *dev) // its cache, then find again. // NB what's here is not very accurate, we actually flush the object // the last recently used page. + + // With locking we can't assume we can use entry zero + theObj = NULL; - usage = 0; + usage = -1; cache = NULL; - pushout = 0; + pushout = -1; for(i = 0; i < dev->nShortOpCaches; i++) { @@ -3654,7 +3566,6 @@ static yaffs_ChunkCache *yaffs_GrabChunkCache(yaffs_Device *dev) } } - return cache; } else @@ -3886,7 +3797,7 @@ int yaffs_ReadDataFromFile(yaffs_Object *in, __u8 * buffer, __u32 offset, int nB -int yaffs_WriteDataToFile(yaffs_Object *in,const __u8 * buffer, __u32 offset, int nBytes) +int yaffs_WriteDataToFile(yaffs_Object *in,const __u8 * buffer, __u32 offset, int nBytes, int writeThrough) { int chunk; @@ -3913,7 +3824,7 @@ int yaffs_WriteDataToFile(yaffs_Object *in,const __u8 * buffer, __u32 offset, in // OK now check for the curveball where the start and end are in // the same chunk. - if( (start + n) < dev->nBytesPerChunk) + if((start + n) < dev->nBytesPerChunk) { nToCopy = n; @@ -3941,7 +3852,7 @@ int yaffs_WriteDataToFile(yaffs_Object *in,const __u8 * buffer, __u32 offset, in { // An incomplete start or end chunk (or maybe both start and end chunk) if(dev->nShortOpCaches > 0) - { + { yaffs_ChunkCache *cache; // If we can't find the data in the cache, then load it up. cache = yaffs_FindChunkCache(in,chunk); @@ -3970,6 +3881,16 @@ int yaffs_WriteDataToFile(yaffs_Object *in,const __u8 * buffer, __u32 offset, in #endif cache->locked = 0; cache->nBytes = nToWriteBack; + + if(writeThrough) + { + chunkWritten = yaffs_WriteChunkDataToObject(cache->object, + cache->chunkId, + cache->data, + cache->nBytes,1); + cache->dirty = 0; + } + } else { @@ -4074,10 +3995,10 @@ static void yaffs_PruneResizedChunks(yaffs_Object *in, int newSize) chunkId = yaffs_FindAndDeleteChunkInFile(in,i,NULL); if(chunkId > 0) { - if(chunkId < (dev->startBlock * dev->nChunksPerBlock) || - chunkId >= ((dev->endBlock+1) * dev->nChunksPerBlock)) + if(chunkId < (dev->internalStartBlock * dev->nChunksPerBlock) || + chunkId >= ((dev->internalEndBlock+1) * dev->nChunksPerBlock)) { - T(YAFFS_TRACE_ALWAYS,("Found daft chunkId %d for %d\n",chunkId,i)); + T(YAFFS_TRACE_ALWAYS,(TSTR("Found daft chunkId %d for %d"TENDSTR),chunkId,i)); } else { @@ -4133,9 +4054,11 @@ int yaffs_ResizeFile(yaffs_Object *in, int newSize) yaffs_PruneFileStructure(dev,&in->variant.fileVariant); - // TODO write a new object header to show we've shrunk the file - // Do this only if the file is not in the deleted directory. - if(in->parent->objectId != YAFFS_OBJECTID_UNLINKED) + // Write a new object header to show we've shrunk the file + // Do this only if the file is not in the deleted directories. + if(in->parent->objectId != YAFFS_OBJECTID_UNLINKED && + in->parent->objectId != YAFFS_OBJECTID_DELETED + ) { yaffs_UpdateObjectHeader(in,NULL, 0, 1); } @@ -4219,7 +4142,7 @@ static int yaffs_DoGenericObjectDeletion(yaffs_Object *in) yaffs_RemoveObjectFromDirectory(in); yaffs_DeleteChunk(in->myDev,in->chunkId,1,__LINE__); in->chunkId = -1; - +#if 0 #ifdef __KERNEL__ if(in->myInode) { @@ -4227,6 +4150,8 @@ static int yaffs_DoGenericObjectDeletion(yaffs_Object *in) in->myInode = 0; } #endif +#endif + yaffs_FreeObject(in); return YAFFS_OK; @@ -4276,6 +4201,10 @@ static int yaffs_UnlinkFile(yaffs_Object *in) T(YAFFS_TRACE_TRACING,(TSTR("yaffs: immediate deletion of file %d" TENDSTR),in->objectId)); in->deleted=1; in->myDev->nDeletedFiles++; + if( 0 && in->myDev->isYaffs2) + { + yaffs_ResizeFile(in,0); + } yaffs_SoftDeleteFile(in); } else @@ -4421,6 +4350,9 @@ static int yaffs_UnlinkWorker(yaffs_Object *obj) case YAFFS_OBJECT_TYPE_SYMLINK: return yaffs_DeleteSymLink(obj); break; + case YAFFS_OBJECT_TYPE_SPECIAL: + return yaffs_DoGenericObjectDeletion(obj); + break; case YAFFS_OBJECT_TYPE_HARDLINK: case YAFFS_OBJECT_TYPE_UNKNOWN: default: @@ -4519,11 +4451,13 @@ static int yaffs_Scan(yaffs_Device *dev) yaffs_ObjectHeader *oh; yaffs_Object *in; yaffs_Object *parent; - int nBlocks = dev->endBlock - dev->startBlock + 1; + int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1; __u8 *chunkData; yaffs_BlockIndex *blockIndex = NULL; + + T(YAFFS_TRACE_SCAN,(TSTR("yaffs_Scan starts intstartblk %d intendblk %d..." TENDSTR),dev->internalStartBlock,dev->internalEndBlock)); chunkData = yaffs_GetTempBuffer(dev,__LINE__); @@ -4537,7 +4471,7 @@ static int yaffs_Scan(yaffs_Device *dev) // Scan all the blocks to determine their state - for(blk = dev->startBlock; blk <= dev->endBlock; blk++) + for(blk = dev->internalStartBlock; blk <= dev->internalEndBlock; blk++) { bi = yaffs_GetBlockInfo(dev,blk); yaffs_ClearChunkBits(dev,blk); @@ -4548,6 +4482,8 @@ static int yaffs_Scan(yaffs_Device *dev) bi->blockState = state; bi->sequenceNumber = sequenceNumber; + + T(YAFFS_TRACE_SCAN_DEBUG,(TSTR("Block scanning block %d state %d seq %d" TENDSTR),blk,state,sequenceNumber)); if(state == YAFFS_BLOCK_STATE_DEAD) { @@ -4555,6 +4491,7 @@ static int yaffs_Scan(yaffs_Device *dev) } else if(state == YAFFS_BLOCK_STATE_EMPTY) { + T(YAFFS_TRACE_SCAN_DEBUG,(TSTR("Block empty " TENDSTR))); dev->nErasedBlocks++; dev->nFreeChunks += dev->nChunksPerBlock; } @@ -4610,13 +4547,15 @@ static int yaffs_Scan(yaffs_Device *dev) { startIterator = 0; endIterator = nBlocksToScan-1; + T(YAFFS_TRACE_SCAN_DEBUG,(TSTR("%d blocks to be scanned" TENDSTR),nBlocksToScan)); } else { - startIterator = dev->startBlock; - endIterator = dev->endBlock; + startIterator = dev->internalStartBlock; + endIterator = dev->internalEndBlock; } + // For each block.... for(blockIterator = startIterator; blockIterator <= endIterator; blockIterator++) { @@ -4636,6 +4575,7 @@ static int yaffs_Scan(yaffs_Device *dev) deleted = 0; + // For each chunk in each block that needs scanning.... for(c = 0; c < dev->nChunksPerBlock && state == YAFFS_BLOCK_STATE_NEEDS_SCANNING; c++) { @@ -4649,6 +4589,7 @@ static int yaffs_Scan(yaffs_Device *dev) if(!dev->isYaffs2 && tags.chunkDeleted) { + // YAFFS1 only... // A deleted chunk deleted++; dev->nFreeChunks ++; @@ -4689,23 +4630,23 @@ static int yaffs_Scan(yaffs_Device *dev) } else if(tags.chunkId > 0) { - int endpos; - // A data chunk. + // chunkId > 0 so it is a data chunk... + unsigned int endpos; + yaffs_SetChunkBit(dev,blk,c); bi->pagesInUse++; in = yaffs_FindOrCreateObjectByNumber(dev,tags.objectId,YAFFS_OBJECT_TYPE_FILE); - // PutChunkIntoFIle checks for a clash (two data chunks with + // PutChunkIntoFile checks for a clash (two data chunks with // the same chunkId). yaffs_PutChunkIntoFile(in,tags.chunkId,chunk,1); endpos = (tags.chunkId - 1)* dev->nBytesPerChunk + tags.byteCount; - if(in->variant.fileVariant.scannedFileSize variantType == YAFFS_OBJECT_TYPE_FILE && in->variant.fileVariant.scannedFileSize variant.fileVariant.scannedFileSize = endpos; if(!dev->useHeaderFileSize) - { - in->variant.fileVariant.fileSize = - in->variant.fileVariant.scannedFileSize; + { + in->variant.fileVariant.fileSize = in->variant.fileVariant.scannedFileSize; } } @@ -4722,6 +4663,18 @@ static int yaffs_Scan(yaffs_Device *dev) oh = (yaffs_ObjectHeader *)chunkData; + in = yaffs_FindObjectByNumber(dev,tags.objectId); + if(in && in->variantType != oh->type) + { + // This should not happen, but somehow + // Wev'e ended up with an objectId that has been reused but not yet + // deleted, and worse still it has changed type. Delete the old object. + + yaffs_DestroyObject(in); + + in = 0; + } + in = yaffs_FindOrCreateObjectByNumber(dev,tags.objectId,oh->type); if(in->valid) @@ -4848,6 +4801,7 @@ static int yaffs_Scan(yaffs_Device *dev) } if(dev->useHeaderFileSize) + in->variant.fileVariant.fileSize = oh->fileSize; break; @@ -4938,69 +4892,652 @@ static int yaffs_Scan(yaffs_Device *dev) if(i) { l = list_entry(i, yaffs_Object,siblings); - if(l->deleted) - { - yaffs_DestroyObject(l); - } + yaffs_DestroyObject(l); } } } yaffs_ReleaseTempBuffer(dev,chunkData,__LINE__); + + T(YAFFS_TRACE_SCAN,(TSTR("yaffs_Scan ends" TENDSTR))); + return YAFFS_OK; } +static int yaffs_ScanBackwards(yaffs_Device *dev) +{ + yaffs_ExtendedTags tags; + int blk; + int blockIterator; + int startIterator; + int endIterator; + int nBlocksToScan = 0; + + int chunk; + int c; + int deleted; + yaffs_BlockState state; + yaffs_Object *hardList = NULL; + yaffs_Object *hl; + yaffs_BlockInfo *bi; + int sequenceNumber; + yaffs_ObjectHeader *oh; + yaffs_Object *in; + yaffs_Object *parent; + int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1; + + __u8 *chunkData; -////////////////////////// Directory Functions ///////////////////////// - + yaffs_BlockIndex *blockIndex = NULL; -static void yaffs_AddObjectToDirectory(yaffs_Object *directory, yaffs_Object *obj) -{ - if(obj->siblings.prev == NULL) - { - // Not initialised - INIT_LIST_HEAD(&obj->siblings); - - } - else if(!list_empty(&obj->siblings)) + if(!dev->isYaffs2) { - // If it is holed up somewhere else, un hook it - list_del_init(&obj->siblings); + T(YAFFS_TRACE_SCAN,(TSTR("yaffs_ScanBackwards is only for YAFFS2!" TENDSTR))); + return YAFFS_FAIL; } - // Now add it - list_add(&obj->siblings,&directory->variant.directoryVariant.children); - obj->parent = directory; - if(directory == obj->myDev->unlinkedDir || directory == obj->myDev->deletedDir) - { - obj->unlinked = 1; - obj->myDev->nUnlinkedFiles++; - obj->renameAllowed = 0; - } -} - -static void yaffs_RemoveObjectFromDirectory(yaffs_Object *obj) -{ - list_del_init(&obj->siblings); - obj->parent = NULL; -} - -yaffs_Object *yaffs_FindObjectByName(yaffs_Object *directory,const YCHAR *name) -{ - int sum; + T(YAFFS_TRACE_SCAN,(TSTR("yaffs_ScanBackwards starts intstartblk %d intendblk %d..." TENDSTR),dev->internalStartBlock,dev->internalEndBlock)); + + chunkData = yaffs_GetTempBuffer(dev,__LINE__); - struct list_head *i; - YCHAR buffer[YAFFS_MAX_NAME_LENGTH+1]; - yaffs_Object *l; + dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER; - sum = yaffs_CalcNameSum(name); + if(dev->isYaffs2) + { + blockIndex = YMALLOC(nBlocks * sizeof(yaffs_BlockIndex)); + } - list_for_each(i,&directory->variant.directoryVariant.children) + + // Scan all the blocks to determine their state + for(blk = dev->internalStartBlock; blk <= dev->internalEndBlock; blk++) { - if(i) + bi = yaffs_GetBlockInfo(dev,blk); + yaffs_ClearChunkBits(dev,blk); + bi->pagesInUse = 0; + bi->softDeletions = 0; + + yaffs_QueryInitialBlockState(dev,blk,&state,&sequenceNumber); + + bi->blockState = state; + bi->sequenceNumber = sequenceNumber; + + T(YAFFS_TRACE_SCAN_DEBUG,(TSTR("Block scanning block %d state %d seq %d" TENDSTR),blk,state,sequenceNumber)); + + if(state == YAFFS_BLOCK_STATE_DEAD) + { + T(YAFFS_TRACE_BAD_BLOCKS,(TSTR("block %d is bad" TENDSTR),blk)); + } + else if(state == YAFFS_BLOCK_STATE_EMPTY) + { + T(YAFFS_TRACE_SCAN_DEBUG,(TSTR("Block empty " TENDSTR))); + dev->nErasedBlocks++; + dev->nFreeChunks += dev->nChunksPerBlock; + } + else if(state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) + { + + // Determine the highest sequence number + if( dev->isYaffs2 && + sequenceNumber >= YAFFS_LOWEST_SEQUENCE_NUMBER && + sequenceNumber < YAFFS_HIGHEST_SEQUENCE_NUMBER) + { + + blockIndex[nBlocksToScan].seq = sequenceNumber; + blockIndex[nBlocksToScan].block = blk; + + nBlocksToScan++; + + if(sequenceNumber >= dev->sequenceNumber) + { + dev->sequenceNumber = sequenceNumber; + } + } + else if(dev->isYaffs2) + { + // TODO: Nasty sequence number! + T(YAFFS_TRACE_SCAN,(TSTR("Block scanning block %d has bad sequence number %d" TENDSTR),blk,sequenceNumber)); + + } + } + } + + // Sort the blocks + // Dungy old bubble sort for now... + if(dev->isYaffs2) + { + yaffs_BlockIndex temp; + int i; + int j; + + for(i = 0; i < nBlocksToScan; i++) + for(j = i+1; j < nBlocksToScan; j++) + if(blockIndex[i].seq > blockIndex[j].seq) + { + temp = blockIndex[j]; + blockIndex[j] = blockIndex[i]; + blockIndex[i] = temp; + } + } + + + // Now scan the blocks looking at the data. + if(dev->isYaffs2) + { + startIterator = 0; + endIterator = nBlocksToScan-1; + T(YAFFS_TRACE_SCAN_DEBUG,(TSTR("%d blocks to be scanned" TENDSTR),nBlocksToScan)); + } + + + // For each block.... backwards + for(blockIterator = endIterator; blockIterator >= startIterator; blockIterator--) + { + + // get the block to scan in the correct order + blk = blockIndex[blockIterator].block; + + + bi = yaffs_GetBlockInfo(dev,blk); + state = bi->blockState; + + deleted = 0; + + if( 0 && // Disable since this is redundant. + state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) + { + // Let's look at the first chunk in the block + chunk = blk * dev->nChunksPerBlock; + + yaffs_ReadChunkWithTagsFromNAND(dev,chunk,NULL,&tags); + + // Let's have a good look at this chunk... + + if(!tags.chunkUsed) + { + // An unassigned chunk in the block + // This means that either the block is empty or + // this is the one being allocated from + + // We're looking at the first chunk in the block so the block is unused + state = YAFFS_BLOCK_STATE_EMPTY; + dev->nErasedBlocks++; + dev->nFreeChunks += dev->nChunksPerBlock; + } + + } + + // For each chunk in each block that needs scanning.... + for(c = dev->nChunksPerBlock-1; c >= 0 && + (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING || + state == YAFFS_BLOCK_STATE_ALLOCATING); c--) + { + // Scan backwards... + // Read the tags and decide what to do + chunk = blk * dev->nChunksPerBlock + c; + + yaffs_ReadChunkWithTagsFromNAND(dev,chunk,NULL,&tags); + + // Let's have a good look at this chunk... + + if(!tags.chunkUsed) + { + // An unassigned chunk in the block + // This means that either the block is empty or + // this is the one being allocated from + + if(c == 0) + { + // We're looking at the first chunk in the block so the block is unused + state = YAFFS_BLOCK_STATE_EMPTY; + dev->nErasedBlocks++; + } + else + { + // this is the block being allocated from + if(state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) + { + T(YAFFS_TRACE_SCAN,(TSTR(" Allocating from %d %d" TENDSTR),blk,c)); + } + state = YAFFS_BLOCK_STATE_ALLOCATING; + dev->allocationBlock = blk; + dev->allocationPage = c; + dev->allocationBlockFinder = blk; // Set it to here to encourage the allocator to + // go forth from here. + //Yaffs2 sanity check: + // This should be the one with the highest sequence number + if(dev->isYaffs2 && (dev->sequenceNumber != bi->sequenceNumber)) + { + T(YAFFS_TRACE_ALWAYS, + (TSTR("yaffs: Allocation block %d was not highest sequence id: block seq = %d, dev seq = %d" TENDSTR), + blk,bi->sequenceNumber,dev->sequenceNumber)); + } + } + + dev->nFreeChunks ++; + } + else if(tags.chunkId > 0) + { + // chunkId > 0 so it is a data chunk... + unsigned int endpos; + + __u32 chunkBase = (tags.chunkId - 1)* dev->nBytesPerChunk; + + yaffs_SetChunkBit(dev,blk,c); + bi->pagesInUse++; + + in = yaffs_FindOrCreateObjectByNumber(dev,tags.objectId,YAFFS_OBJECT_TYPE_FILE); + if(in->variantType == YAFFS_OBJECT_TYPE_FILE && + chunkBase < in->variant.fileVariant.shrinkSize) + { + // This has not been invalidated by a resize + yaffs_PutChunkIntoFile(in,tags.chunkId,chunk,-1); + + + // File size is calculated by looking at the data chunks if we have not + // seen an object header yet. Stop this practice once we find an object header. + endpos = (tags.chunkId - 1)* dev->nBytesPerChunk + tags.byteCount; + if(!in->valid && // have not got an object header yet + in->variant.fileVariant.scannedFileSize variant.fileVariant.scannedFileSize = endpos; + in->variant.fileVariant.fileSize = in->variant.fileVariant.scannedFileSize; + } + + } + else + { + // This chunk has been invalidated by a resize, so delete + yaffs_DeleteChunk(dev,chunk,1,__LINE__); + + + } + //T((" %d %d data %d %d\n",blk,c,tags.objectId,tags.chunkId)); + } + else + { + // chunkId == 0, so it is an ObjectHeader. + // Thus, we read in the object header and make the object + yaffs_SetChunkBit(dev,blk,c); + bi->pagesInUse++; + + oh = NULL; + in = NULL; + + if(tags.extraHeaderInfoAvailable) + { + in = yaffs_FindOrCreateObjectByNumber(dev,tags.objectId,tags.extraObjectType); + } + + + if(!in || !in->valid) + { + + // If we don't have valid info then we need to read the chunk + // TODO In future we can probably defer reading the chunk and + // living with invalid data until needed. + + yaffs_ReadChunkWithTagsFromNAND(dev,chunk,chunkData,NULL); + + oh = (yaffs_ObjectHeader *)chunkData; + + if(!in) + in = yaffs_FindOrCreateObjectByNumber(dev,tags.objectId,oh->type); + + } + + if(!in) + { + // TODO Hoosterman we have a problem! + T(YAFFS_TRACE_ERROR, (TSTR("yaffs tragedy: Could not make object for object %d at chunk %d during scan" TENDSTR),tags.objectId,chunk)); + + } + + if(in->valid) + { + // We have already filled this one. We have a duplicate that will be discarded, but + // we first have to suck out resize info if it is a file. + + if( (in->variantType == YAFFS_OBJECT_TYPE_FILE) && + ((oh && oh->type == YAFFS_OBJECT_TYPE_FILE) || + (tags.extraHeaderInfoAvailable && tags.extraObjectType == YAFFS_OBJECT_TYPE_FILE)) + ) + { + __u32 thisSize = (oh) ? oh->fileSize : tags.extraFileLength; + __u32 parentObjectId = (oh) ? oh->parentObjectId : tags.extraParentObjectId; + unsigned isShrink = (oh) ? oh->isShrink : tags.extraIsShrinkHeader; + + // If it is deleted (unlinked at start also means deleted) + // we treat the file size as being zeroed at this point. + if(parentObjectId == YAFFS_OBJECTID_DELETED || + parentObjectId == YAFFS_OBJECTID_UNLINKED) + { + thisSize = 0; + isShrink = 1; + } + + if(in->variant.fileVariant.shrinkSize > thisSize) + { + in->variant.fileVariant.shrinkSize = thisSize; + } + + if(isShrink) + { + bi->hasShrinkHeader = 1; + } + + } + // Use existing - destroy this one. + yaffs_DeleteChunk(dev,chunk,1,__LINE__); + + } + + if(!in->valid && + (tags.objectId == YAFFS_OBJECTID_ROOT || + tags.objectId == YAFFS_OBJECTID_LOSTNFOUND)) + { + // We only load some info, don't fiddle with directory structure + in->valid = 1; + in->variantType = oh->type; + + in->st_mode = oh->st_mode; +#ifdef CONFIG_YAFFS_WINCE + in->win_atime[0] = oh->win_atime[0]; + in->win_ctime[0] = oh->win_ctime[0]; + in->win_mtime[0] = oh->win_mtime[0]; + in->win_atime[1] = oh->win_atime[1]; + in->win_ctime[1] = oh->win_ctime[1]; + in->win_mtime[1] = oh->win_mtime[1]; +#else + in->st_uid = oh->st_uid; + in->st_gid = oh->st_gid; + in->st_atime = oh->st_atime; + in->st_mtime = oh->st_mtime; + in->st_ctime = oh->st_ctime; + in->st_rdev = oh->st_rdev; +#endif + in->chunkId = chunk; + + } + else if(!in->valid) + { + // we need to load this info + + in->valid = 1; + in->variantType = oh->type; + + in->st_mode = oh->st_mode; +#ifdef CONFIG_YAFFS_WINCE + in->win_atime[0] = oh->win_atime[0]; + in->win_ctime[0] = oh->win_ctime[0]; + in->win_mtime[0] = oh->win_mtime[0]; + in->win_atime[1] = oh->win_atime[1]; + in->win_ctime[1] = oh->win_ctime[1]; + in->win_mtime[1] = oh->win_mtime[1]; +#else + in->st_uid = oh->st_uid; + in->st_gid = oh->st_gid; + in->st_atime = oh->st_atime; + in->st_mtime = oh->st_mtime; + in->st_ctime = oh->st_ctime; + in->st_rdev = oh->st_rdev; +#endif + in->chunkId = chunk; + + yaffs_SetObjectName(in,oh->name); + in->dirty = 0; + + // directory stuff... + // hook up to parent + + parent = yaffs_FindOrCreateObjectByNumber(dev,oh->parentObjectId,YAFFS_OBJECT_TYPE_DIRECTORY); + if(parent->variantType == YAFFS_OBJECT_TYPE_UNKNOWN) + { + // Set up as a directory + parent->variantType = YAFFS_OBJECT_TYPE_DIRECTORY; + INIT_LIST_HEAD(&parent->variant.directoryVariant.children); + } + else if(parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) + { + // Hoosterman, another problem.... + // We're trying to use a non-directory as a directory + + T(YAFFS_TRACE_ERROR, (TSTR("yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found." TENDSTR))); + parent = dev->lostNFoundDir; + } + + yaffs_AddObjectToDirectory(parent,in); + + if((parent == dev->deletedDir || + parent == dev->unlinkedDir)) + { + in->deleted = 1; // If it is unlinked at start up then it wants deleting + } + + if( oh->isShrink) + { + // Mark the block as having a shrinkHeader + bi->hasShrinkHeader = 1; + } + + + // Note re hardlinks. + // Since we might scan a hardlink before its equivalent object is scanned + // we put them all in a list. + // After scanning is complete, we should have all the objects, so we run through this + // list and fix up all the chains. + + switch(in->variantType) + { + case YAFFS_OBJECT_TYPE_UNKNOWN: // Todo got a problem + break; + case YAFFS_OBJECT_TYPE_FILE: + + + if(in->variant.fileVariant.scannedFileSize < oh->fileSize) + { + in->variant.fileVariant.fileSize = oh->fileSize; + in->variant.fileVariant.scannedFileSize = in->variant.fileVariant.fileSize; + } + + + + if(in->variant.fileVariant.shrinkSize > oh->fileSize) + { + in->variant.fileVariant.shrinkSize = oh->fileSize; + } + + + break; + case YAFFS_OBJECT_TYPE_HARDLINK: + in->variant.hardLinkVariant.equivalentObjectId = oh->equivalentObjectId; + in->hardLinks.next = (struct list_head *)hardList; + hardList = in; + break; + case YAFFS_OBJECT_TYPE_DIRECTORY: // Do nothing + break; + case YAFFS_OBJECT_TYPE_SPECIAL: // Do nothing + break; + case YAFFS_OBJECT_TYPE_SYMLINK: // Do nothing + in->variant.symLinkVariant.alias = yaffs_CloneString(oh->alias); + break; + } + +#if 0 + if(parent == dev->deletedDir) + { + yaffs_DestroyObject(in); + bi->hasShrinkHeader = 1; + } +#endif + //T((" %d %d header %d \"%s\" type %d\n",blk,c,tags.objectId,oh->name,in->variantType)); + } + } + } + + if(state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) + { + // If we got this far while scanning, then the block is fully allocated. + state = YAFFS_BLOCK_STATE_FULL; + } + + bi->blockState = state; + + // Now let's see if it was dirty + if( bi->pagesInUse == 0 && + !bi->hasShrinkHeader && + bi->blockState == YAFFS_BLOCK_STATE_FULL) + { + yaffs_BlockBecameDirty(dev,blk); + } + + } + + if(blockIndex) + { + YFREE(blockIndex); + } + + // Ok, we've done all the scanning. + + // Fix up the hard link chains. + // We should now have scanned all the objects, now it's time to add these + // hardlinks. + while(hardList) + { + hl = hardList; + hardList = (yaffs_Object *)(hardList->hardLinks.next); + + in = yaffs_FindObjectByNumber(dev,hl->variant.hardLinkVariant.equivalentObjectId); + + if(in) + { + // Add the hardlink pointers + hl->variant.hardLinkVariant.equivalentObject=in; + list_add(&hl->hardLinks,&in->hardLinks); + } + else + { + //Todo Need to report/handle this better. + // Got a problem... hardlink to a non-existant object + hl->variant.hardLinkVariant.equivalentObject=NULL; + INIT_LIST_HEAD(&hl->hardLinks); + + } + + } + + { + struct list_head *i; + struct list_head *n; + + yaffs_Object *l; + + // Soft delete all the unlinked files + list_for_each_safe(i,n,&dev->unlinkedDir->variant.directoryVariant.children) + { + if(i) + { + l = list_entry(i, yaffs_Object,siblings); + yaffs_DestroyObject(l); + } + } + + // Soft delete all the deletedDir files + list_for_each_safe(i,n,&dev->deletedDir->variant.directoryVariant.children) + { + if(i) + { + l = list_entry(i, yaffs_Object,siblings); + yaffs_DestroyObject(l); + + } + } + } + + yaffs_ReleaseTempBuffer(dev,chunkData,__LINE__); + + T(YAFFS_TRACE_SCAN,(TSTR("yaffs_ScanBackwards ends" TENDSTR))); + + return YAFFS_OK; +} + + + +////////////////////////// Directory Functions ///////////////////////// + + +static void yaffs_AddObjectToDirectory(yaffs_Object *directory, yaffs_Object *obj) +{ + + if(!directory) + { + T(YAFFS_TRACE_ALWAYS,(TSTR("tragedy: Trying to add an object to a null pointer directory" TENDSTR))); + YBUG(); + } + if(directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) + { + T(YAFFS_TRACE_ALWAYS,(TSTR("tragedy: Trying to add an object to a non-directory" TENDSTR))); + YBUG(); + } + + if(obj->siblings.prev == NULL) + { + // Not initialised + INIT_LIST_HEAD(&obj->siblings); + + } + else if(!list_empty(&obj->siblings)) + { + // If it is holed up somewhere else, un hook it + list_del_init(&obj->siblings); + } + // Now add it + list_add(&obj->siblings,&directory->variant.directoryVariant.children); + obj->parent = directory; + + if(directory == obj->myDev->unlinkedDir || directory == obj->myDev->deletedDir) + { + obj->unlinked = 1; + obj->myDev->nUnlinkedFiles++; + obj->renameAllowed = 0; + } +} + +static void yaffs_RemoveObjectFromDirectory(yaffs_Object *obj) +{ + list_del_init(&obj->siblings); + obj->parent = NULL; +} + +yaffs_Object *yaffs_FindObjectByName(yaffs_Object *directory,const YCHAR *name) +{ + int sum; + + struct list_head *i; + YCHAR buffer[YAFFS_MAX_NAME_LENGTH+1]; + + yaffs_Object *l; + + + if(!directory) + { + T(YAFFS_TRACE_ALWAYS,(TSTR("tragedy: yaffs_FindObjectByName: null pointer directory"TENDSTR))); + YBUG(); + } + if(directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) + { + T(YAFFS_TRACE_ALWAYS,(TSTR("tragedy: yaffs_FindObjectByName: non-directory"TENDSTR))); + YBUG(); + } + + sum = yaffs_CalcNameSum(name); + + list_for_each(i,&directory->variant.directoryVariant.children) + { + if(i) { l = list_entry(i, yaffs_Object,siblings); @@ -5035,6 +5572,17 @@ int yaffs_ApplyToDirectoryChildren(yaffs_Object *theDir,int (*fn)(yaffs_Object * struct list_head *i; yaffs_Object *l; + + if(!theDir) + { + T(YAFFS_TRACE_ALWAYS,(TSTR("tragedy: yaffs_FindObjectByName: null pointer directory"TENDSTR))); + YBUG(); + } + if(theDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) + { + T(YAFFS_TRACE_ALWAYS,(TSTR("tragedy: yaffs_FindObjectByName: non-directory"TENDSTR))); + YBUG(); + } list_for_each(i,&theDir->variant.directoryVariant.children) { @@ -5313,13 +5861,27 @@ int yaffs_GutsInitialise(yaffs_Device *dev) int extraBits; int nBlocks; + T(YAFFS_TRACE_ALWAYS,(TSTR("yaffs: yaffs_GutsInitialise()" TENDSTR))); // Check stuff that must be set if(!dev) { - T(YAFFS_TRACE_ALWAYS,(TSTR("yaffs: Need a device\n" TENDSTR))); + T(YAFFS_TRACE_ALWAYS,(TSTR("yaffs: Need a device" TENDSTR))); return YAFFS_FAIL; } + + dev->internalStartBlock = dev->startBlock; + dev->internalEndBlock = dev->endBlock; + dev->blockOffset = 0; + dev->chunkOffset = 0; + + if(dev->startBlock == 0) + { + dev->internalStartBlock = dev->startBlock + 1; + dev->internalEndBlock = dev->endBlock + 1; + dev->blockOffset = 1; + dev->chunkOffset = dev->nChunksPerBlock; + } // Check geometry parameters. @@ -5327,15 +5889,21 @@ int yaffs_GutsInitialise(yaffs_Device *dev) (!dev->isYaffs2 && dev->nBytesPerChunk !=512) || dev->nChunksPerBlock < 2 || dev->nReservedBlocks < 2 || - dev->startBlock <= 0 || - dev->endBlock <= 0 || - dev->endBlock <= (dev->startBlock + dev->nReservedBlocks + 2) // otherwise it is too small + dev->internalStartBlock <= 0 || + dev->internalEndBlock <= 0 || + dev->internalEndBlock <= (dev->internalStartBlock + dev->nReservedBlocks + 2) // otherwise it is too small ) { - T(YAFFS_TRACE_ALWAYS,(TSTR("yaffs: nand geometry problems\n" TENDSTR))); + T(YAFFS_TRACE_ALWAYS,(TSTR("yaffs: NAND geometry problems: chunk size %d, type is yaffs%s " TENDSTR), + dev->nBytesPerChunk, dev->isYaffs2 ? "2" : "")); return YAFFS_FAIL; } + if(yaffs_InitialiseNAND(dev) != YAFFS_OK) + { + T(YAFFS_TRACE_ALWAYS,(TSTR("yaffs: InitialiseNAND failed" TENDSTR))); + return YAFFS_FAIL; + } // Got the right mix of functions? // @@ -5368,15 +5936,15 @@ int yaffs_GutsInitialise(yaffs_Device *dev) dev->isMounted = 1; - nBlocks = dev->endBlock - dev->startBlock + 1; + nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1; // OK now calculate a few things for the device // Calculate chunkGroupBits. - // We need to find the next power of 2 > than endBlock + // We need to find the next power of 2 > than internalEndBlock - x = dev->nChunksPerBlock * (dev->endBlock+1); + x = dev->nChunksPerBlock * (dev->internalEndBlock+1); for(bits = extraBits = 0; x > 1; bits++) { @@ -5428,6 +5996,7 @@ int yaffs_GutsInitialise(yaffs_Device *dev) dev->tagsEccFixed=0; dev->tagsEccUnfixed=0; dev->nErasureFailures = 0; + dev->nErasedBlocks = 0; //dev->localBuffer = YMALLOC(dev->nBytesPerChunk); // Initialise temporary buffers @@ -5442,7 +6011,6 @@ int yaffs_GutsInitialise(yaffs_Device *dev) - yaffs_InitialiseBlocks(dev,nBlocks); yaffs_InitialiseTnodes(dev); @@ -5479,7 +6047,7 @@ int yaffs_GutsInitialise(yaffs_Device *dev) dev->lostNFoundDir = dev->rootDir = dev->unlinkedDir = dev->deletedDir = NULL; dev->unlinkedDir = yaffs_CreateFakeDirectory(dev,YAFFS_OBJECTID_UNLINKED, S_IFDIR); - dev->deletedDir = yaffs_CreateFakeDirectory(dev,YAFFS_OBJECTID_UNLINKED, S_IFDIR); + dev->deletedDir = yaffs_CreateFakeDirectory(dev,YAFFS_OBJECTID_DELETED, S_IFDIR); dev->rootDir = yaffs_CreateFakeDirectory(dev,YAFFS_OBJECTID_ROOT,YAFFS_ROOT_MODE | S_IFDIR); dev->lostNFoundDir = yaffs_CreateFakeDirectory(dev,YAFFS_OBJECTID_LOSTNFOUND,YAFFS_LOSTNFOUND_MODE | S_IFDIR); @@ -5491,7 +6059,11 @@ int yaffs_GutsInitialise(yaffs_Device *dev) } // Now scan the flash. - yaffs_Scan(dev); + + if(dev->isYaffs2) + yaffs_ScanBackwards(dev); + else + yaffs_Scan(dev); // Zero out stats dev->nPageReads = 0; @@ -5502,7 +6074,7 @@ int yaffs_GutsInitialise(yaffs_Device *dev) dev->nRetiredBlocks = 0; - + T(YAFFS_TRACE_ALWAYS,(TSTR("yaffs: yaffs_GutsInitialise() done.\n" TENDSTR))); return YAFFS_OK; } @@ -5583,7 +6155,7 @@ int yaffs_GetNumberOfFreeChunks(yaffs_Device *dev) struct list_head *i; yaffs_Object *l; - for(nFree = 0, b = dev->startBlock; b <= dev->endBlock; b++) + for(nFree = 0, b = dev->internalStartBlock; b <= dev->internalEndBlock; b++) { blk = yaffs_GetBlockInfo(dev,b); @@ -5686,4 +6258,3 @@ void yaffs_GutsTest(yaffs_Device *dev) #endif -