X-Git-Url: http://www.aleph1.co.uk/gitweb/?p=yaffs%2F.git;a=blobdiff_plain;f=yaffs_guts.c;h=fcb217ae850f3b4d98fc85abccac0c7a43684b26;hp=bfe10b74deb2aa6140d47fe876831f1a2b695ad2;hb=f0494eb05c40ce19d74bedc92a020a743fbec08e;hpb=4d9efb8e3f1bd240579632b4c1446d7384c3cc96 diff --git a/yaffs_guts.c b/yaffs_guts.c index bfe10b7..fcb217a 100644 --- a/yaffs_guts.c +++ b/yaffs_guts.c @@ -14,21 +14,25 @@ */ //yaffs_guts.c -const char *yaffs_guts_c_version="$Id: yaffs_guts.c,v 1.10 2002-09-27 20:50:50 charles Exp $"; +const char *yaffs_guts_c_version="$Id: yaffs_guts.c,v 1.44 2005-11-07 07:03:02 charles Exp $"; #include "yportenv.h" #include "yaffsinterface.h" #include "yaffs_guts.h" +#define YAFFS_PASSIVE_GC_CHUNKS 2 -#define YAFFS_GARBAGE_COLLECT_LOW_WATER 2 - - +#if 0 +// Use Steven Hill's ECC struff instead // External functions for ECC on data void nand_calculate_ecc (const u_char *dat, u_char *ecc_code); int nand_correct_data (u_char *dat, u_char *read_ecc, u_char *calc_ecc); - +#define yaffs_ECCCalculate(data,ecc) nand_calculate_ecc(data,ecc) +#define yaffs_ECCCorrect(data,read_ecc,calc_ecc) nand_correct_ecc(data,read_ecc,calc_ecc) +#else +#include "yaffs_ecc.h" +#endif // 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. @@ -71,7 +75,7 @@ static int yaffs_PutChunkIntoFile(yaffs_Object *in,int chunkInInode, int chunkIn static yaffs_Object *yaffs_CreateNewObject(yaffs_Device *dev,int number,yaffs_ObjectType type); static void yaffs_AddObjectToDirectory(yaffs_Object *directory, yaffs_Object *obj); static int yaffs_UpdateObjectHeader(yaffs_Object *in,const char *name, int force); -static void yaffs_DeleteChunk(yaffs_Device *dev,int chunkId); +static void yaffs_DeleteChunk(yaffs_Device *dev,int chunkId,int markNAND); static void yaffs_RemoveObjectFromDirectory(yaffs_Object *obj); static int yaffs_CheckStructures(void); static int yaffs_DeleteWorker(yaffs_Object *in, yaffs_Tnode *tn, __u32 level, int chunkOffset,int *limit); @@ -89,7 +93,7 @@ static void yaffs_HandleUpdateChunk(yaffs_Device *dev,int chunkInNAND, const yaf static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,int chunkInNAND); static int yaffs_UnlinkWorker(yaffs_Object *obj); - +static void yaffs_AbortHalfCreatedObject(yaffs_Object *obj); static int yaffs_VerifyCompare(const __u8 *d0, const __u8 * d1, const yaffs_Spare *s0, const yaffs_Spare *s1); @@ -109,21 +113,69 @@ static int yaffs_CheckFileSanity(yaffs_Object *in); #define yaffs_CheckFileSanity(in) #endif -#ifdef CONFIG_YAFFS_SHORT_OP_CACHE -static void yaffs_InvalidateChunkCache(yaffs_Object *in); -#define yaffs_INVALIDATECHUNKCACHE(in) yaffs_InvalidateChunkCache(in) -#else -#define yaffs_INVALIDATECHUNKCACHE(in) -#endif +static void yaffs_InvalidateWholeChunkCache(yaffs_Object *in); +static void yaffs_InvalidateChunkCache(yaffs_Object *object, int chunkId); + +// Chunk bitmap manipulations + +static __inline __u8 *yaffs_BlockBits(yaffs_Device *dev, int blk) +{ + 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->internalStartBlock)); +} + +static __inline__ void yaffs_ClearChunkBits(yaffs_Device *dev,int blk) +{ + __u8 *blkBits = yaffs_BlockBits(dev,blk); + + memset(blkBits,0,dev->chunkBitmapStride); +} + +static __inline__ void yaffs_ClearChunkBit(yaffs_Device *dev,int blk,int chunk) +{ + __u8 *blkBits = yaffs_BlockBits(dev,blk); + + blkBits[chunk/8] &= ~ (1<<(chunk & 7)); +} + +static __inline__ void yaffs_SetChunkBit(yaffs_Device *dev,int blk,int chunk) +{ + __u8 *blkBits = yaffs_BlockBits(dev,blk); + + blkBits[chunk/8] |= (1<<(chunk & 7)); +} + +static __inline__ int yaffs_CheckChunkBit(yaffs_Device *dev,int blk,int chunk) +{ + __u8 *blkBits = yaffs_BlockBits(dev,blk); + return (blkBits[chunk/8] & (1<<(chunk & 7))) ? 1 :0; +} +static __inline__ int yaffs_StillSomeChunkBits(yaffs_Device *dev,int blk) +{ + __u8 *blkBits = yaffs_BlockBits(dev,blk); + int i; + for(i = 0; i < dev->chunkBitmapStride; i++) + { + if(*blkBits) return 1; + blkBits++; + } + return 0; +} +// Function to manipulate block info static __inline__ yaffs_BlockInfo* yaffs_GetBlockInfo(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: getBlockInfo block %d is not valid" TENDSTR),blk)); YBUG(); } - return &dev->blockInfo[blk - dev->startBlock]; + return &dev->blockInfo[blk - dev->internalStartBlock]; } @@ -146,20 +198,32 @@ yaffs_Object *yaffs_LostNFound(yaffs_Device *dev) static int yaffs_WriteChunkToNAND(struct yaffs_DeviceStruct *dev,int chunkInNAND, const __u8 *data, yaffs_Spare *spare) { + if(chunkInNAND < dev->internalStartBlock * 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); + return dev->writeChunkToNAND(dev,chunkInNAND - dev->chunkOffset,data,spare); } -int yaffs_ReadChunkFromNAND(struct yaffs_DeviceStruct *dev,int chunkInNAND, __u8 *data, yaffs_Spare *spare,int doErrorCorrection) + +int yaffs_ReadChunkFromNAND(struct yaffs_DeviceStruct *dev, + int chunkInNAND, + __u8 *data, + yaffs_Spare *spare, + int doErrorCorrection) { int retVal; - __u8 calcEcc[3]; yaffs_Spare localSpare; - int eccResult1,eccResult2; - + dev->nPageReads++; + + + if(!spare && data) { // If we don't have a real spare, then we use a local one. @@ -167,43 +231,84 @@ int yaffs_ReadChunkFromNAND(struct yaffs_DeviceStruct *dev,int chunkInNAND, __u8 spare = &localSpare; } - retVal = dev->readChunkFromNAND(dev,chunkInNAND,data,spare); - if(data && doErrorCorrection) + + if(!dev->useNANDECC) { - // Do ECC correction - //Todo handle any errors - nand_calculate_ecc(data,calcEcc); - eccResult1 = nand_correct_data (data,spare->ecc1, calcEcc); - nand_calculate_ecc(&data[256],calcEcc); - eccResult2 = nand_correct_data (&data[256],spare->ecc2, calcEcc); - - if(eccResult1>0) - { - T((TSTR("**>>ecc error fix performed on chunk %d:0" TENDSTR),chunkInNAND)); - dev->eccFixed++; - } - else if(eccResult1<0) - { - T((TSTR("**>>ecc error unfixed on chunk %d:0" TENDSTR),chunkInNAND)); - dev->eccUnfixed++; - } - - if(eccResult2>0) - { - T((TSTR("**>>ecc error fix performed on chunk %d:1" TENDSTR),chunkInNAND)); - dev->eccFixed++; - } - else if(eccResult2<0) - { - T((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); - } + retVal = dev->readChunkFromNAND(dev,chunkInNAND - dev->chunkOffset,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->chunkOffset)); + dev->eccFixed++; + } + else if(eccResult1<0) + { + T(YAFFS_TRACE_ERROR,(TSTR("**>>ecc error unfixed on chunk %d:0" TENDSTR),chunkInNAND - dev->chunkOffset)); + dev->eccUnfixed++; + } + + if(eccResult2>0) + { + T(YAFFS_TRACE_ERROR,(TSTR("**>>ecc error fix performed on chunk %d:1" TENDSTR),chunkInNAND - dev->chunkOffset)); + dev->eccFixed++; + } + else if(eccResult2<0) + { + T(YAFFS_TRACE_ERROR,(TSTR("**>>ecc error unfixed on chunk %d:1" TENDSTR),chunkInNAND - dev->chunkOffset)); + 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 - dev->chunkOffset,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 - dev->chunkOffset)); + } + else if(nspare.eccres1<0) + { + T(YAFFS_TRACE_ERROR,(TSTR("**>>ecc error unfixed on chunk %d:0" TENDSTR),chunkInNAND - dev->chunkOffset)); + } + + if(nspare.eccres2>0) + { + T(YAFFS_TRACE_ERROR,(TSTR("**>>ecc error fix performed on chunk %d:1" TENDSTR),chunkInNAND - dev->chunkOffset)); + } + else if(nspare.eccres2<0) + { + T(YAFFS_TRACE_ERROR,(TSTR("**>>ecc error unfixed on chunk %d:1" TENDSTR),chunkInNAND - dev->chunkOffset)); + } + + if(nspare.eccres1 || nspare.eccres2) + { + // Hoosterman, we had a data problem on this page + yaffs_HandleReadDataError(dev,chunkInNAND); + } + + } } return retVal; } @@ -215,12 +320,10 @@ static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,int chunkInNAND static int init = 0; static __u8 cmpbuf[YAFFS_BYTES_PER_CHUNK]; static __u8 data[YAFFS_BYTES_PER_CHUNK]; - static __u8 spare[16]; - - - dev->readChunkFromNAND(dev,chunkInNAND,data,(yaffs_Spare *)spare); - - + // Might as well always allocate the larger size for dev->useNANDECC == true; + static __u8 spare[sizeof(struct yaffs_NANDSpare)]; + + dev->readChunkFromNAND(dev,chunkInNAND - dev->chunkOffset,data,(yaffs_Spare *)spare); if(!init) { @@ -241,7 +344,7 @@ static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,int chunkInNAND int yaffs_EraseBlockInNAND(struct yaffs_DeviceStruct *dev,int blockInNAND) { dev->nBlockErasures++; - return dev->eraseBlockInNAND(dev,blockInNAND); + return dev->eraseBlockInNAND(dev,blockInNAND - dev->blockOffset); } int yaffs_InitialiseNAND(struct yaffs_DeviceStruct *dev) @@ -271,7 +374,7 @@ static int yaffs_WriteNewChunkToNAND(struct yaffs_DeviceStruct *dev, const __u8 #endif if(!writeOk) { - T((TSTR("**>> yaffs chunk %d was not erased" TENDSTR),chunk)); + T(YAFFS_TRACE_ERROR,(TSTR("**>> yaffs chunk %d was not erased" TENDSTR),chunk)); } else { @@ -289,9 +392,9 @@ static int yaffs_WriteNewChunkToNAND(struct yaffs_DeviceStruct *dev, const __u8 #ifndef CONFIG_YAFFS_DISABLE_WRITE_VERIFY if(!yaffs_VerifyCompare(data,rbData,spare,&rbSpare)) - { + { // Didn't verify - T((TSTR("**>> yaffs write verify failed on chunk %d" TENDSTR), chunk)); + T(YAFFS_TRACE_ERROR,(TSTR("**>> yaffs write verify failed on chunk %d" TENDSTR), chunk)); writeOk = 0; } @@ -315,7 +418,7 @@ static int yaffs_WriteNewChunkToNAND(struct yaffs_DeviceStruct *dev, const __u8 if(attempts > 1) { - T((TSTR("**>> yaffs write required %d attempts" TENDSTR),attempts)); + T(YAFFS_TRACE_ERROR,(TSTR("**>> yaffs write required %d attempts" TENDSTR),attempts)); dev->nRetriedWrites+= (attempts - 1); } @@ -337,8 +440,9 @@ static void yaffs_RetireBlock(yaffs_Device *dev,int blockInNAND) spare.blockStatus = 0; - yaffs_WriteChunkToNAND(dev, blockInNAND * YAFFS_CHUNKS_PER_BLOCK, NULL , &spare); - yaffs_WriteChunkToNAND(dev, blockInNAND * YAFFS_CHUNKS_PER_BLOCK + 1, NULL , &spare); + // TODO change this retirement marking for other NAND types + yaffs_WriteChunkToNAND(dev, blockInNAND * dev->nChunksPerBlock, NULL , &spare); + yaffs_WriteChunkToNAND(dev, blockInNAND * dev->nChunksPerBlock + 1, NULL , &spare); yaffs_GetBlockInfo(dev,blockInNAND)->blockState = YAFFS_BLOCK_STATE_DEAD; dev->nRetiredBlocks++; @@ -362,11 +466,11 @@ static int yaffs_RewriteBufferedBlock(yaffs_Device *dev) static void yaffs_HandleReadDataError(yaffs_Device *dev,int chunkInNAND) { - int blockInNAND = chunkInNAND/YAFFS_CHUNKS_PER_BLOCK; + int blockInNAND = chunkInNAND/dev->nChunksPerBlock; // Mark the block for retirement yaffs_GetBlockInfo(dev,blockInNAND)->needsRetiring = 1; - T((TSTR("**>>Block %d marked for retirement" TENDSTR),blockInNAND)); + T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,(TSTR("**>>Block %d marked for retirement" TENDSTR),blockInNAND)); //TODO @@ -389,12 +493,12 @@ static void yaffs_HandleUpdateChunk(yaffs_Device *dev,int chunkInNAND, const yaf static void yaffs_HandleWriteChunkError(yaffs_Device *dev,int chunkInNAND) { - int blockInNAND = chunkInNAND/YAFFS_CHUNKS_PER_BLOCK; + int blockInNAND = chunkInNAND/dev->nChunksPerBlock; // Mark the block for retirement yaffs_GetBlockInfo(dev,blockInNAND)->needsRetiring = 1; // Delete the chunk - yaffs_DeleteChunk(dev,chunkInNAND); + yaffs_DeleteChunk(dev,chunkInNAND,1); } @@ -449,9 +553,14 @@ static __u16 yaffs_CalcNameSum(const char *name) __u8 *bname = (__u8 *)name; if(bname) { - while (*bname) + while ((*bname) && (i <=YAFFS_MAX_NAME_LENGTH)) { + +#ifdef CONFIG_YAFFS_CASE_INSENSITIVE + sum += toupper(*bname) * i; +#else sum += (*bname) * i; +#endif i++; bname++; } @@ -459,11 +568,25 @@ static __u16 yaffs_CalcNameSum(const char *name) return sum; } +void yaffs_SetObjectName(yaffs_Object *obj, const char *name) +{ +#ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM + if(name && strlen(name) <= YAFFS_SHORT_NAME_LENGTH) + { + strcpy(obj->shortName,name); + } + else + { + obj->shortName[0]='\0'; + } +#endif + obj->sum = yaffs_CalcNameSum(name); +} void yaffs_CalcECC(const __u8 *data, yaffs_Spare *spare) { - nand_calculate_ecc (data , spare->ecc1); - nand_calculate_ecc (&data[256] , spare->ecc2); + yaffs_ECCCalculate(data , spare->ecc1); + yaffs_ECCCalculate(&data[256] , spare->ecc2); } void yaffs_CalcTagsECC(yaffs_Tags *tags) @@ -559,7 +682,7 @@ static int yaffs_CreateTnodes(yaffs_Device *dev,int nTnodes) if (!newTnodes) { - YALERT("Could not malloc tnodes"); + T(YAFFS_TRACE_ERROR,(TSTR("yaffs: Could not allocate Tnodes"TENDSTR))); return YAFFS_FAIL; } @@ -567,19 +690,27 @@ static int yaffs_CreateTnodes(yaffs_Device *dev,int nTnodes) for(i = 0; i < nTnodes - 1; i++) { newTnodes[i].internal[0] = &newTnodes[i+1]; +#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG + newTnodes[i].internal[YAFFS_NTNODES_INTERNAL] = 1; +#endif } newTnodes[nTnodes - 1].internal[0] = dev->freeTnodes; +#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG + newTnodes[nTnodes - 1].internal[YAFFS_NTNODES_INTERNAL] = 1; +#endif dev->freeTnodes = newTnodes; dev->nFreeTnodes+= nTnodes; dev->nTnodesCreated += nTnodes; // Now add this bunch of tnodes to a list for freeing up. - + // NB If we can't add this to the management list it isn't fatal + // but it just means we can't free this bunch of tnodes later. tnl = YMALLOC(sizeof(yaffs_TnodeList)); if(!tnl) { - YALERT("Could not add tnodes to management list"); + T(YAFFS_TRACE_ERROR,(TSTR("yaffs: Could not add tnodes to management list" TENDSTR))); + } else { @@ -589,7 +720,7 @@ static int yaffs_CreateTnodes(yaffs_Device *dev,int nTnodes) } - YINFO("Tnodes created"); + T(YAFFS_TRACE_ALLOCATE,(TSTR("yaffs: Tnodes added" TENDSTR))); return YAFFS_OK; @@ -610,6 +741,13 @@ static yaffs_Tnode *yaffs_GetTnode(yaffs_Device *dev) if(dev->freeTnodes) { tn = dev->freeTnodes; +#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG + if(tn->internal[YAFFS_NTNODES_INTERNAL] != 1) + { + // Hoosterman, this thing looks like it isn't in the list + T(YAFFS_TRACE_ALWAYS,(TSTR("yaffs: Tnode list bug 1" TENDSTR))); + } +#endif dev->freeTnodes = dev->freeTnodes->internal[0]; dev->nFreeTnodes--; // zero out @@ -624,20 +762,36 @@ static yaffs_Tnode *yaffs_GetTnode(yaffs_Device *dev) // FreeTnode frees up a tnode and puts it back on the free list static void yaffs_FreeTnode(yaffs_Device*dev, yaffs_Tnode *tn) { - tn->internal[0] = dev->freeTnodes; - dev->freeTnodes = tn; - dev->nFreeTnodes++; + if(tn) + { +#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG + if(tn->internal[YAFFS_NTNODES_INTERNAL] != 0) + { + // Hoosterman, this thing looks like it is already in the list + T(YAFFS_TRACE_ALWAYS,(TSTR("yaffs: Tnode list bug 2" TENDSTR))); + } + tn->internal[YAFFS_NTNODES_INTERNAL] = 1; +#endif + tn->internal[0] = dev->freeTnodes; + dev->freeTnodes = tn; + dev->nFreeTnodes++; + } } static void yaffs_DeinitialiseTnodes(yaffs_Device*dev) { // Free the list of allocated tnodes - + yaffs_TnodeList *tmp; + while(dev->allocatedTnodeList) { + tmp = dev->allocatedTnodeList->next; + YFREE(dev->allocatedTnodeList->tnodes); - dev->allocatedTnodeList = dev->allocatedTnodeList->next; + YFREE(dev->allocatedTnodeList); + dev->allocatedTnodeList = tmp; + } dev->freeTnodes = NULL; @@ -653,6 +807,7 @@ static void yaffs_InitialiseTnodes(yaffs_Device*dev) } +#if 0 void yaffs_TnodeTest(yaffs_Device *dev) { @@ -680,6 +835,8 @@ void yaffs_TnodeTest(yaffs_Device *dev) } } +#endif + ////////////////// END OF TNODE MANIPULATION /////////////////////////// @@ -701,17 +858,17 @@ static yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device *dev,yaffs_FileStructure // Check sane level and chunk Id if(level < 0 || level > YAFFS_TNODES_MAX_LEVEL) { - char str[50]; - sprintf(str,"Bad level %d",level); - YALERT(str); +// char str[50]; +// sprintf(str,"Bad level %d",level); +// YALERT(str); return NULL; } if(chunkId > YAFFS_MAX_CHUNK_ID) { - char str[50]; - sprintf(str,"Bad chunkId %d",chunkId); - YALERT(str); +// char str[50]; +// sprintf(str,"Bad chunkId %d",chunkId); +// YALERT(str); return NULL; } @@ -758,37 +915,38 @@ static yaffs_Tnode *yaffs_AddOrFindLevel0Tnode(yaffs_Device *dev, yaffs_FileStru yaffs_Tnode *tn; int requiredTallness; + int i; + int l; - __u32 i; - __u32 l; - + __u32 x; + //T((TSTR("AddOrFind topLevel=%d, chunk=%d"),fStruct->topLevel,chunkId)); // Check sane level and page Id if(fStruct->topLevel < 0 || fStruct->topLevel > YAFFS_TNODES_MAX_LEVEL) { - char str[50]; - sprintf(str,"Bad level %d",fStruct->topLevel); - YALERT(str); +// char str[50]; +// sprintf(str,"Bad level %d",fStruct->topLevel); +// YALERT(str); return NULL; } if(chunkId > YAFFS_MAX_CHUNK_ID) { - char str[50]; - sprintf(str,"Bad chunkId %d",chunkId); - YALERT(str); +// char str[50]; +// sprintf(str,"Bad chunkId %d",chunkId); +// YALERT(str); return NULL; } // First check we're tall enough (ie enough topLevel) - i = chunkId >> (/*dev->chunkGroupBits + */YAFFS_TNODES_LEVEL0_BITS); + x = chunkId >> (/*dev->chunkGroupBits + */YAFFS_TNODES_LEVEL0_BITS); requiredTallness = 0; - while(i) + while(x) { - i >>= YAFFS_TNODES_INTERNAL_BITS; + x >>= YAFFS_TNODES_INTERNAL_BITS; requiredTallness++; } @@ -811,7 +969,7 @@ static yaffs_Tnode *yaffs_AddOrFindLevel0Tnode(yaffs_Device *dev, yaffs_FileStru } else { - YALERT("No more tnodes"); + T(YAFFS_TRACE_ERROR,(TSTR("yaffs: no more tnodes" TENDSTR))); } } @@ -825,19 +983,19 @@ static yaffs_Tnode *yaffs_AddOrFindLevel0Tnode(yaffs_Device *dev, yaffs_FileStru tn = fStruct->top; while (l > 0 && tn) { - i = (chunkId >> (/*dev->chunkGroupBits + */YAFFS_TNODES_LEVEL0_BITS + (l-1) * YAFFS_TNODES_INTERNAL_BITS)) & + x = (chunkId >> (/*dev->chunkGroupBits + */YAFFS_TNODES_LEVEL0_BITS + (l-1) * YAFFS_TNODES_INTERNAL_BITS)) & YAFFS_TNODES_INTERNAL_MASK; //T((TSTR(" [%d:%d]"),l,i)); - if(!tn->internal[i]) + if(!tn->internal[x]) { //T((TSTR(" added"))); - tn->internal[i] = yaffs_GetTnode(dev); + tn->internal[x] = yaffs_GetTnode(dev); } - tn = tn->internal[i]; + tn = tn->internal[x]; l--; } @@ -892,7 +1050,9 @@ static int yaffs_DeleteWorker(yaffs_Object *in, yaffs_Tnode *tn, __u32 level, in } else if(level == 0) { - for(i = YAFFS_NTNODES_LEVEL0 -1; i >= 0; i--) //NB Don't apply the limit here, always delete a whole level0 + int hitLimit = 0; + + for(i = YAFFS_NTNODES_LEVEL0 -1; i >= 0 && !hitLimit; i--) { if(tn->level0[i]) { @@ -920,11 +1080,15 @@ static int yaffs_DeleteWorker(yaffs_Object *in, yaffs_Tnode *tn, __u32 level, in if(found) { - yaffs_DeleteChunk(in->myDev,theChunk); + yaffs_DeleteChunk(in->myDev,theChunk,1); in->nDataChunks--; if(limit) { *limit = *limit-1; + if(*limit <= 0) + { + hitLimit = 1; + } } } @@ -933,7 +1097,7 @@ static int yaffs_DeleteWorker(yaffs_Object *in, yaffs_Tnode *tn, __u32 level, in } } - return 1; + return (i < 0) ? 1 : 0; } @@ -944,6 +1108,104 @@ static int yaffs_DeleteWorker(yaffs_Object *in, yaffs_Tnode *tn, __u32 level, in } +// SoftDeleteWorker scans backwards through the tnode tree and soft deletes all the chunks in the file. +// All soft deleting does is increment the block's softdelete count and pulls the chunk out +// of the tnode. +// THus, essentially this is the same as DeleteWorker except that the chunks are soft deleted. +// +static int yaffs_SoftDeleteWorker(yaffs_Object *in, yaffs_Tnode *tn, __u32 level, int chunkOffset) +{ + int i; + int chunkInInode; + int theChunk; + yaffs_BlockInfo *theBlock; + yaffs_Tags tags; + int found; + int chunkDeleted; + int allDone = 1; + + + if(tn) + { + if(level > 0) + { + + for(i = YAFFS_NTNODES_INTERNAL -1; allDone && i >= 0; i--) + { + if(tn->internal[i]) + { + allDone = yaffs_SoftDeleteWorker(in,tn->internal[i],level - 1, + (chunkOffset << YAFFS_TNODES_INTERNAL_BITS ) + i); + if(allDone) + { + yaffs_FreeTnode(in->myDev,tn->internal[i]); + tn->internal[i] = NULL; + } + else + { + //Hoosterman... how could this happen. + } + } + } + return (allDone) ? 1 : 0; + } + else if(level == 0) + { + + for(i = YAFFS_NTNODES_LEVEL0 -1; i >=0; i--) + { + if(tn->level0[i]) + { + // Note this does not find the real chunk, only the chunk group. + // We make an assumption that a chunk group is niot larger than a block. + theChunk = (tn->level0[i] << in->myDev->chunkGroupBits); + T(YAFFS_TRACE_SCAN,(TSTR("soft delete tch %d cgb %d chunk %d" TENDSTR), + tn->level0[i],in->myDev->chunkGroupBits,theChunk)); + + theBlock = yaffs_GetBlockInfo(in->myDev, theChunk/in->myDev->nChunksPerBlock); + if(theBlock) + { + theBlock->softDeletions++; + } + tn->level0[i] = 0; + } + + } + return 1; + + } + + } + + return 1; + +} + + + +static void yaffs_SoftDeleteFile(yaffs_Object *obj) +{ + if(obj->deleted && + obj->variantType == YAFFS_OBJECT_TYPE_FILE && + !obj->softDeleted) + { + if(obj->nDataChunks <= 0) + { + // Empty file, just delete it immediately + yaffs_FreeTnode(obj->myDev,obj->variant.fileVariant.top); + obj->variant.fileVariant.top = NULL; + T(YAFFS_TRACE_TRACING,(TSTR("yaffs: Deleting empty file %d" TENDSTR),obj->objectId)); + yaffs_DoGenericObjectDeletion(obj); + } + else + { + yaffs_SoftDeleteWorker(obj, obj->variant.fileVariant.top, obj->variant.fileVariant.topLevel, 0); + obj->softDeleted = 1; + } + } +} + + @@ -1044,6 +1306,7 @@ static int yaffs_PruneFileStructure(yaffs_Device *dev, yaffs_FileStructure *fStr + /////////////////////// End of File Structure functions. ///////////////// // yaffs_CreateFreeObjects creates a bunch more objects and @@ -1062,14 +1325,14 @@ static int yaffs_CreateFreeObjects(yaffs_Device *dev, int nObjects) if (!newObjects) { - YALERT("Could not allocate more objects"); + T(YAFFS_TRACE_ALLOCATE,(TSTR("yaffs: Could not allocate more objects" TENDSTR))); return YAFFS_FAIL; } // Hook them into the free list for(i = 0; i < nObjects - 1; i++) { - (yaffs_Object *)newObjects[i].siblings.next = &newObjects[i+1]; + newObjects[i].siblings.next = (struct list_head *)(&newObjects[i+1]); } newObjects[nObjects - 1].siblings.next = (void *)dev->freeObjects; @@ -1082,7 +1345,7 @@ static int yaffs_CreateFreeObjects(yaffs_Device *dev, int nObjects) list = YMALLOC(sizeof(yaffs_ObjectList)); if(!list) { - YALERT("Could not add Objects to management list"); + T(YAFFS_TRACE_ALLOCATE,(TSTR("Could not add objects to management list" TENDSTR))); } else { @@ -1092,8 +1355,6 @@ static int yaffs_CreateFreeObjects(yaffs_Device *dev, int nObjects) } - YINFO("Objects created"); - return YAFFS_OK; } @@ -1150,7 +1411,7 @@ static yaffs_Object *yaffs_CreateFakeDirectory(yaffs_Device *dev,int number,__u3 obj->unlinkAllowed= 0; // ... or unlink it obj->deleted = 0; obj->unlinked = 0; - obj->st_mode = mode; + obj->yst_mode = mode; obj->myDev = dev; obj->chunkId = 0; // Not a valid chunk. } @@ -1183,25 +1444,52 @@ static void yaffs_FreeObject(yaffs_Object *tn) yaffs_Device *dev = tn->myDev; +#ifdef __KERNEL__ + if(tn->myInode) + { + // We're still hooked up to a cached inode. + // Don't delete now, but mark for later deletion + tn->deferedFree = 1; + return; + } +#endif + yaffs_UnhashObject(tn); // Link into the free list. - (yaffs_Object *)(tn->siblings.next) = dev->freeObjects; + tn->siblings.next = (struct list_head *)(dev->freeObjects); dev->freeObjects = tn; dev->nFreeObjects++; } +#ifdef __KERNEL__ + +void yaffs_HandleDeferedFree(yaffs_Object *obj) +{ + if(obj->deferedFree) + { + yaffs_FreeObject(obj); + } +} + +#endif + static void yaffs_DeinitialiseObjects(yaffs_Device *dev) { // Free the list of allocated Objects + yaffs_ObjectList *tmp; + while( dev->allocatedObjectList) { + tmp = dev->allocatedObjectList->next; YFREE(dev->allocatedObjectList->objects); - dev->allocatedObjectList = dev->allocatedObjectList->next; + YFREE(dev->allocatedObjectList); + + dev->allocatedObjectList = tmp; } dev->freeObjects = NULL; @@ -1279,7 +1567,7 @@ static int yaffs_CreateNewObjectNumber(yaffs_Device *dev) int found = 0; struct list_head *i; - int n = bucket; + __u32 n = (__u32)bucket; //yaffs_CheckObjectHashSanity(); @@ -1292,7 +1580,7 @@ static int yaffs_CreateNewObjectNumber(yaffs_Device *dev) list_for_each(i,&dev->objectBucket[bucket].list) { // If there is already one in the list - if(list_entry(i, yaffs_Object,hashLink)->objectId == n) + if(i && list_entry(i, yaffs_Object,hashLink)->objectId == n) { found = 0; } @@ -1312,16 +1600,16 @@ void yaffs_HashObject(yaffs_Object *in) if(!list_empty(&in->hashLink)) { - YINFO("!!!"); + //YINFO("!!!"); } - + list_add(&in->hashLink,&dev->objectBucket[bucket].list); dev->objectBucket[bucket].count++; } -yaffs_Object *yaffs_FindObjectByNumber(yaffs_Device *dev,int number) +yaffs_Object *yaffs_FindObjectByNumber(yaffs_Device *dev,__u32 number) { int bucket = yaffs_HashFunction(number); struct list_head *i; @@ -1330,10 +1618,18 @@ yaffs_Object *yaffs_FindObjectByNumber(yaffs_Device *dev,int number) list_for_each(i,&dev->objectBucket[bucket].list) { // Look if it is in the list - in = list_entry(i, yaffs_Object,hashLink); - if(in->objectId == number) + if(i) { - return in; + in = list_entry(i, yaffs_Object,hashLink); + if(in->objectId == number) + { +#ifdef __KERNEL__ + // Don't tell the VFS about this if it has been marked for freeing + if(in->deferedFree) + return NULL; +#endif + return in; + } } } @@ -1362,8 +1658,16 @@ yaffs_Object *yaffs_CreateNewObject(yaffs_Device *dev,int number,yaffs_ObjectTyp theObject->objectId = number; yaffs_HashObject(theObject); theObject->variantType = type; - theObject->st_atime = theObject->st_mtime = theObject->st_ctime = CURRENT_TIME; +#ifdef CONFIG_YAFFS_WINCE + yfsd_WinFileTimeNow(theObject->win_atime); + theObject->win_ctime[0] = theObject->win_mtime[0] = theObject->win_atime[0]; + theObject->win_ctime[1] = theObject->win_mtime[1] = theObject->win_atime[1]; + +#else + theObject->yst_atime = theObject->yst_mtime = theObject->yst_ctime = Y_CURRENT_TIME; + +#endif switch(type) { case YAFFS_OBJECT_TYPE_FILE: @@ -1458,15 +1762,23 @@ yaffs_Object *yaffs_MknodObject( yaffs_ObjectType type, in->valid = 1; in->variantType = type; - in->st_mode = mode; - in->st_rdev = rdev; - in->st_uid = uid; - in->st_gid = gid; - in->st_atime = in->st_mtime = in->st_ctime = CURRENT_TIME; + in->yst_mode = mode; +#ifdef CONFIG_YAFFS_WINCE + yfsd_WinFileTimeNow(in->win_atime); + in->win_ctime[0] = in->win_mtime[0] = in->win_atime[0]; + in->win_ctime[1] = in->win_mtime[1] = in->win_atime[1]; + +#else + + in->yst_atime = in->yst_mtime = in->yst_ctime = Y_CURRENT_TIME; + in->yst_rdev = rdev; + in->yst_uid = uid; + in->yst_gid = gid; +#endif in->nDataChunks = 0; - in->sum = yaffs_CalcNameSum(name); + yaffs_SetObjectName(in,name); in->dirty = 1; yaffs_AddObjectToDirectory(parent,in); @@ -1491,11 +1803,11 @@ yaffs_Object *yaffs_MknodObject( yaffs_ObjectType type, break; } - if(yaffs_GetNumberOfFreeChunks(dev) <= 0 || + if(/*yaffs_GetNumberOfFreeChunks(dev) <= 0 || */ yaffs_UpdateObjectHeader(in,name,0) < 0) { // Could not create the object header, fail the creation - yaffs_UnlinkWorker(in); + yaffs_AbortHalfCreatedObject(in); in = NULL; } @@ -1516,7 +1828,7 @@ yaffs_Object *yaffs_MknodDirectory(yaffs_Object *parent,const char *name, __u32 yaffs_Object *yaffs_MknodSpecial(yaffs_Object *parent,const char *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 char *name, __u32 mode, __u32 uid, __u32 gid,const char *alias) @@ -1542,7 +1854,7 @@ yaffs_Object *yaffs_Link(yaffs_Object *parent, const char *name, yaffs_Object *e } -static int yaffs_ChangeObjectName(yaffs_Object *obj, yaffs_Object *newDir, const char *newName) +static int yaffs_ChangeObjectName(yaffs_Object *obj, yaffs_Object *newDir, const char *newName,int force) { int unlinkOp; @@ -1556,11 +1868,12 @@ static int yaffs_ChangeObjectName(yaffs_Object *obj, yaffs_Object *newDir, const // If the object is a file going into the unlinked directory, then it is OK to just stuff it in since // duplicate names are allowed. // Otherwise only proceed if the new name does not exist and if we're putting it into a directory. - if( unlinkOp|| - (!yaffs_FindObjectByName(newDir,newName) && - newDir->variantType == YAFFS_OBJECT_TYPE_DIRECTORY)) + if( (unlinkOp|| + force || + !yaffs_FindObjectByName(newDir,newName)) && + newDir->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) { - obj->sum = yaffs_CalcNameSum(newName); + yaffs_SetObjectName(obj,newName); obj->dirty = 1; yaffs_AddObjectToDirectory(newDir,obj); @@ -1577,14 +1890,27 @@ static int yaffs_ChangeObjectName(yaffs_Object *obj, yaffs_Object *newDir, const return YAFFS_FAIL; } + + int yaffs_RenameObject(yaffs_Object *oldDir, const char *oldName, yaffs_Object *newDir, const char *newName) { yaffs_Object *obj; + int force = 0; + +#ifdef CONFIG_YAFFS_CASE_INSENSITIVE + // Special case for WinCE. + // While look-up is case insensitive, the name isn't. + // THerefore we might want to change x.txt to X.txt + if(oldDir == newDir && _stricmp(oldName,newName) == 0) + { + force = 1; + } +#endif obj = yaffs_FindObjectByName(oldDir,oldName); if(obj && obj->renameAllowed) { - return yaffs_ChangeObjectName(obj,newDir,newName); + return yaffs_ChangeObjectName(obj,newDir,newName,force); } return YAFFS_FAIL; } @@ -1611,7 +1937,7 @@ static int yaffs_CheckObjectHashSanity(yaffs_Device *dev) if(countEm != dev->objectBucket[bucket].count) { - YALERT("Inode hash inconsistency"); + T(YAFFS_TRACE_ERROR,(TSTR("Inode hash inconsistency" TENDSTR))); ok = YAFFS_FAIL; } } @@ -1619,6 +1945,7 @@ static int yaffs_CheckObjectHashSanity(yaffs_Device *dev) return ok; } +#if 0 void yaffs_ObjectTest(yaffs_Device *dev) { yaffs_Object *in[1000]; @@ -1675,7 +2002,7 @@ void yaffs_ObjectTest(yaffs_Device *dev) } - +#endif /////////////////////////// Block Management and Page Allocation /////////////////// @@ -1685,11 +2012,16 @@ static int yaffs_InitialiseBlocks(yaffs_Device *dev,int nBlocks) dev->allocationBlock = -1; // force it to get a new one //Todo we're assuming the malloc will pass. dev->blockInfo = YMALLOC(nBlocks * sizeof(yaffs_BlockInfo)); - if(dev->blockInfo) + // Set up dynamic blockinfo stuff. + dev->chunkBitmapStride = (dev->nChunksPerBlock+7)/8; + dev->chunkBits = YMALLOC(dev->chunkBitmapStride * nBlocks); + if(dev->blockInfo && dev->chunkBits) { memset(dev->blockInfo,0,nBlocks * sizeof(yaffs_BlockInfo)); + memset(dev->chunkBits,0,dev->chunkBitmapStride * nBlocks); return YAFFS_OK; } + return YAFFS_FAIL; } @@ -1697,36 +2029,64 @@ static int yaffs_InitialiseBlocks(yaffs_Device *dev,int nBlocks) static void yaffs_DeinitialiseBlocks(yaffs_Device *dev) { YFREE(dev->blockInfo); + dev->blockInfo = NULL; + YFREE(dev->chunkBits); + dev->chunkBits = NULL; } // FindDiretiestBlock is used to select the dirtiest block (or close enough) // for garbage collection. -static int yaffs_FindDirtiestBlock(yaffs_Device *dev) +static int yaffs_FindDirtiestBlock(yaffs_Device *dev,int aggressive) { int b = dev->currentDirtyChecker; int i; + int iterations; int dirtiest = -1; - int pagesInUse = 100; // silly big number + int pagesInUse; yaffs_BlockInfo *bi; + + // If we're doing aggressive GC then we are happy to take a less-dirty block, and + // search further. + + pagesInUse = (aggressive)? dev->nChunksPerBlock : YAFFS_PASSIVE_GC_CHUNKS + 1; + if(aggressive) + { + iterations = dev->internalEndBlock - dev->internalStartBlock + 1; + } + else + { + iterations = dev->internalEndBlock - dev->internalStartBlock + 1; + iterations = iterations / 16; + if(iterations > 200) + { + iterations = 200; + } + } - for(i = dev->startBlock; i <= dev->endBlock && pagesInUse > 2 ; i++) + for(i = 0; i <= iterations && pagesInUse > 0 ; i++) { b++; - if (b > dev->endBlock) + if ( b < dev->internalStartBlock || b > dev->internalEndBlock) + { + b = dev->internalStartBlock; + } + + if(b < dev->internalStartBlock || b > dev->internalEndBlock) { - b = dev->startBlock; + T(YAFFS_TRACE_ERROR,(TSTR("**>> Block %d is not valid" TENDSTR),b)); + YBUG(); } bi = yaffs_GetBlockInfo(dev,b); if(bi->blockState == YAFFS_BLOCK_STATE_FULL && - bi->pagesInUse < pagesInUse) + (bi->pagesInUse - bi->softDeletions )< pagesInUse) { dirtiest = b; - pagesInUse = bi->pagesInUse; + pagesInUse = (bi->pagesInUse - bi->softDeletions); } } @@ -1751,23 +2111,25 @@ static void yaffs_BlockBecameDirty(yaffs_Device *dev,int blockNo) erasedOk = yaffs_EraseBlockInNAND(dev,blockNo); if(!erasedOk) { - T((TSTR("**>> Erasure failed %d" TENDSTR),blockNo)); + T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,(TSTR("**>> Erasure failed %d" TENDSTR),blockNo)); } } if( erasedOk ) { + // Clean it up... bi->blockState = YAFFS_BLOCK_STATE_EMPTY; dev->nErasedBlocks++; bi->pagesInUse = 0; - bi->pageBits = 0; + bi->softDeletions = 0; + yaffs_ClearChunkBits(dev,blockNo); - T((TSTR("Erased block %d" TENDSTR),blockNo)); + T(YAFFS_TRACE_ERASE,(TSTR("Erased block %d" TENDSTR),blockNo)); } else { yaffs_RetireBlock(dev,blockNo); - T((TSTR("**>> Block %d retired" TENDSTR),blockNo)); + T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,(TSTR("**>> Block %d retired" TENDSTR),blockNo)); } } @@ -1775,25 +2137,35 @@ static void yaffs_BlockBecameDirty(yaffs_Device *dev,int blockNo) static int yaffs_FindBlockForAllocation(yaffs_Device *dev) { int i; + yaffs_BlockInfo *bi; if(dev->nErasedBlocks < 1) { // Hoosterman we've got a problem. // Can't get space to gc + T(YAFFS_TRACE_ERROR, (TSTR("yaffs tragedy: no space during gc" TENDSTR))); + return -1; } // Find an empty block. - for(i = dev->startBlock; i <= dev->endBlock; i++) + for(i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) { - bi = yaffs_GetBlockInfo(dev,i); + dev->allocationBlockFinder++; + if(dev->allocationBlockFinder internalStartBlock || dev->allocationBlockFinder> dev->internalEndBlock) + { + dev->allocationBlockFinder = dev->internalStartBlock; + } + + bi = yaffs_GetBlockInfo(dev,dev->allocationBlockFinder); + if(bi->blockState == YAFFS_BLOCK_STATE_EMPTY) { bi->blockState = YAFFS_BLOCK_STATE_ALLOCATING; dev->nErasedBlocks--; - return i; + return dev->allocationBlockFinder; } } @@ -1814,7 +2186,7 @@ static int yaffs_AllocateChunk(yaffs_Device *dev,int useReserve) dev->allocationPage = 0; } - if(!useReserve && dev->nErasedBlocks <= YAFFS_RESERVED_BLOCKS) + if(!useReserve && dev->nErasedBlocks <= dev->nReservedBlocks) { // Not enough space to allocate unless we're allowed to use the reserve. return -1; @@ -1825,17 +2197,17 @@ static int yaffs_AllocateChunk(yaffs_Device *dev,int useReserve) { bi = yaffs_GetBlockInfo(dev,dev->allocationBlock); - retVal = (dev->allocationBlock * YAFFS_CHUNKS_PER_BLOCK) + + retVal = (dev->allocationBlock * dev->nChunksPerBlock) + dev->allocationPage; bi->pagesInUse++; - bi->pageBits |= (1 << (dev->allocationPage)); + yaffs_SetChunkBit(dev,dev->allocationBlock,dev->allocationPage); dev->allocationPage++; dev->nFreeChunks--; // If the block is full set the state to full - if(dev->allocationPage >= YAFFS_CHUNKS_PER_BLOCK) + if(dev->allocationPage >= dev->nChunksPerBlock) { bi->blockState = YAFFS_BLOCK_STATE_FULL; dev->allocationBlock = -1; @@ -1845,83 +2217,122 @@ static int yaffs_AllocateChunk(yaffs_Device *dev,int useReserve) return retVal; } - T((TSTR("!!!!!!!!! Allocator out !!!!!!!!!!!!!!!!!" TENDSTR))); + T(YAFFS_TRACE_ERROR,(TSTR("!!!!!!!!! Allocator out !!!!!!!!!!!!!!!!!" TENDSTR))); return -1; } +// To determine if we have enough space we just look at the +// number of erased blocks. +// The cache is allowed to use reserved blocks. -int yaffs_GarbageCollectBlock(yaffs_Device *dev,int block) +static int yaffs_CheckSpaceForChunkCache(yaffs_Device *dev) { - int oldChunk; - int newChunk; - __u32 mask; + return (dev->nErasedBlocks >= dev->nReservedBlocks); +} + + +static int yaffs_GarbageCollectBlock(yaffs_Device *dev,int block) +{ + int oldChunk; + int newChunk; + int chunkInBlock; + int markNAND; yaffs_Spare spare; yaffs_Tags tags; - __u8 buffer[YAFFS_BYTES_PER_CHUNK]; + __u8 buffer[YAFFS_BYTES_PER_CHUNK]; - yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev,block); +// yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev,block); yaffs_Object *object; //T(("Collecting block %d n %d bits %x\n",block, bi->pagesInUse, bi->pageBits)); - for(mask = 1,oldChunk = block * YAFFS_CHUNKS_PER_BLOCK; - mask && bi->pageBits; - mask <<= 1, oldChunk++ ) + for(chunkInBlock = 0,oldChunk = block * dev->nChunksPerBlock; + chunkInBlock < dev->nChunksPerBlock && yaffs_StillSomeChunkBits(dev,block); + chunkInBlock++, oldChunk++ ) { - if(bi->pageBits & mask) + if(yaffs_CheckChunkBit(dev,block,chunkInBlock)) { - // This page is in use and needs to be copied off + // This page is in use and might need to be copied off - dev->nGCCopies++; + markNAND = 1; //T(("copying page %x from %d to %d\n",mask,oldChunk,newChunk)); yaffs_ReadChunkFromNAND(dev,oldChunk,buffer, &spare,1); yaffs_GetTagsFromSpare(dev,&spare,&tags); - - tags.serialNumber++; - yaffs_LoadTagsIntoSpare(&spare,&tags); -#if 0 - newChunk = yaffs_AllocatePage(dev,1); - if(newChunk < 0) + object = yaffs_FindObjectByNumber(dev,tags.objectId); + + if(object && object->deleted && tags.chunkId != 0) { - return YAFFS_FAIL; + // Data chunk in a deleted file, throw it away + // It's a deleted data chunk, + // No need to copy this, just forget about it and fix up the + // object. + + //yaffs_PutChunkIntoFile(object, tags.chunkId, 0,0); + object->nDataChunks--; + + if(object->nDataChunks <= 0) + { + // Time to delete the file too + yaffs_FreeTnode(object->myDev,object->variant.fileVariant.top); + object->variant.fileVariant.top = NULL; + T(YAFFS_TRACE_TRACING,(TSTR("yaffs: About to finally delete object %d" TENDSTR),object->objectId)); + yaffs_DoGenericObjectDeletion(object); + } + markNAND = 0; } - - yaffs_WriteChunkToNAND(dev,newChunk, buffer, &spare); - -#else - newChunk = yaffs_WriteNewChunkToNAND(dev, buffer, &spare,1); -#endif - if(newChunk < 0) + else if( 0 /* Todo object && object->deleted && object->nDataChunks == 0 */) { - return YAFFS_FAIL; + // Deleted object header with no data chunks. + // Can be discarded and the file deleted. + object->chunkId = 0; + yaffs_FreeTnode(object->myDev,object->variant.fileVariant.top); + object->variant.fileVariant.top = NULL; + yaffs_DoGenericObjectDeletion(object); + } + else if(object) + { + // It's either a data chunk in a live file or + // an ObjectHeader, so we're interested in it. + // NB Need to keep the ObjectHeaders of deleted files + // until the whole file has been deleted off + tags.serialNumber++; + yaffs_LoadTagsIntoSpare(&spare,&tags); - object = yaffs_FindObjectByNumber(dev,tags.objectId); + dev->nGCCopies++; + + newChunk = yaffs_WriteNewChunkToNAND(dev, buffer, &spare,1); + + if(newChunk < 0) + { + return YAFFS_FAIL; + } - // Ok, now fix up the Tnodes etc. + // Ok, now fix up the Tnodes etc. - if(tags.chunkId == 0) - { - // It's a header - object->chunkId = newChunk; - } - else - { - // It's a data chunk - yaffs_PutChunkIntoFile(object, tags.chunkId, newChunk,0); - + if(tags.chunkId == 0) + { + // It's a header + object->chunkId = newChunk; + object->serial = tags.serialNumber; + } + else + { + // It's a data chunk + yaffs_PutChunkIntoFile(object, tags.chunkId, newChunk,0); + } } - yaffs_DeleteChunk(dev,oldChunk); + yaffs_DeleteChunk(dev,oldChunk,markNAND); } } @@ -1932,23 +2343,27 @@ int yaffs_GarbageCollectBlock(yaffs_Device *dev,int block) static yaffs_Object *yaffs_FindDeletedUnlinkedFile(yaffs_Device *dev) { - // todo find a file to delete + // find a file to delete struct list_head *i; yaffs_Object *l; - // To the free chunks add the chunks that are in the deleted unlinked files. + //Scan the unlinked files looking for one to delete list_for_each(i,&dev->unlinkedDir->variant.directoryVariant.children) { - l = list_entry(i, yaffs_Object,siblings); - if(l->deleted) + if(i) { - return l; + l = list_entry(i, yaffs_Object,siblings); + if(l->deleted) + { + return l; + } } } return NULL; } + static void yaffs_DoUnlinkedFileDeletion(yaffs_Device *dev) { // This does background deletion on unlinked files.. only deleted ones. @@ -1962,9 +2377,12 @@ static void yaffs_DoUnlinkedFileDeletion(yaffs_Device *dev) if(dev->unlinkedDeletion) { yaffs_Object *obj = dev->unlinkedDeletion; - int limit; int delresult; - limit = 50; // Max number of chunks to delete in a file. NB this can be exceeded, but not by much. + int limit; // Number of chunks to delete in a file. + // NB this can be exceeded, but not by much. + + limit = -1; + delresult = yaffs_DeleteWorker(obj, obj->variant.fileVariant.top, obj->variant.fileVariant.topLevel, 0,&limit); if(obj->nDataChunks == 0) @@ -1972,6 +2390,7 @@ static void yaffs_DoUnlinkedFileDeletion(yaffs_Device *dev) // Done all the deleting of data chunks. // Now dump the header and clean up yaffs_FreeTnode(dev,obj->variant.fileVariant.top); + obj->variant.fileVariant.top = NULL; yaffs_DoGenericObjectDeletion(obj); dev->nDeletedFiles--; dev->nUnlinkedFiles--; @@ -1981,32 +2400,28 @@ static void yaffs_DoUnlinkedFileDeletion(yaffs_Device *dev) } } + +#if 0 +#define YAFFS_GARBAGE_COLLECT_LOW_WATER 2 static int yaffs_CheckGarbageCollection(yaffs_Device *dev) { int block; + int aggressive=0; - yaffs_DoUnlinkedFileDeletion(dev); + //yaffs_DoUnlinkedFileDeletion(dev); - if(dev->nErasedBlocks <= (YAFFS_RESERVED_BLOCKS + YAFFS_GARBAGE_COLLECT_LOW_WATER)) + if(dev->nErasedBlocks <= (dev->nReservedBlocks + YAFFS_GARBAGE_COLLECT_LOW_WATER)) { - dev->garbageCollectionRequired = 1; - } + aggressive = 1; + } - if(dev->garbageCollectionRequired) + if(aggressive) { - dev->garbageCollections++; - dev->garbageCollectionRequired = 0; - if(dev->blockSelectedForGC >= 0) - { - block = dev->blockSelectedForGC; - } - else - { - block = yaffs_FindDirtiestBlock(dev); - } + block = yaffs_FindDirtiestBlock(dev,aggressive); if(block >= 0) { + dev->garbageCollections++; return yaffs_GarbageCollectBlock(dev,block); } else @@ -2017,6 +2432,46 @@ static int yaffs_CheckGarbageCollection(yaffs_Device *dev) return YAFFS_OK; } +#endif + +// New garbage collector +// If we're very low on erased blocks then we do aggressive garbage collection +// otherwise we do "passive" garbage collection. +// Aggressive gc looks further (whole array) and will accept dirtier blocks. +// Passive gc only inspects smaller areas and will only accept cleaner blocks. +// +// The idea is to help clear out space in a more spread-out manner. +// Dunno if it really does anything useful. +// +static int yaffs_CheckGarbageCollection(yaffs_Device *dev) +{ + int block; + int aggressive=0; + + //yaffs_DoUnlinkedFileDeletion(dev); + + if(dev->nErasedBlocks <= (dev->nReservedBlocks + 1)) + { + aggressive = 1; + } + + block = yaffs_FindDirtiestBlock(dev,aggressive); + + if(block >= 0) + { + dev->garbageCollections++; + if(!aggressive) + { + dev->passiveGarbageCollections++; + } + + T(YAFFS_TRACE_GC,(TSTR("yaffs: GC erasedBlocks %d aggressive %d" TENDSTR),dev->nErasedBlocks,aggressive)); + + return yaffs_GarbageCollectBlock(dev,block); + } + + return aggressive ? YAFFS_FAIL : YAFFS_OK; +} //////////////////////////// TAGS /////////////////////////////////////// @@ -2102,8 +2557,7 @@ static int yaffs_WriteChunkWithTagsToNAND(yaffs_Device *dev,int chunkInNAND, con yaffs_SpareInitialise(&spare); - - if(buffer) + if(!dev->useNANDECC && buffer) { yaffs_CalcECC(buffer,&spare); } @@ -2130,8 +2584,7 @@ static int yaffs_WriteNewChunkWithTagsToNAND(yaffs_Device *dev, const __u8 *buff yaffs_SpareInitialise(&spare); - - if(buffer) + if(!dev->useNANDECC && buffer) { yaffs_CalcECC(buffer,&spare); } @@ -2253,7 +2706,7 @@ int yaffs_FindAndDeleteChunkInFile(yaffs_Object *in,int chunkInInode,yaffs_Tags } -#if YAFFS_PARANOID +#ifdef YAFFS_PARANOID static int yaffs_CheckFileSanity(yaffs_Object *in) { @@ -2277,7 +2730,7 @@ static int yaffs_CheckFileSanity(yaffs_Object *in) objId = in->objectId; fSize = in->variant.fileVariant.fileSize; - nChunks = (fSize + YAFFS_BYTES_PER_CHUNK -1)/YAFFS_BYTES_PER_CHUNK; + nChunks = (fSize + in->myDev->nBytesPerChunk -1)/in->myDev->nBytesPerChunk; for(chunk = 1; chunk <= nChunks; chunk++) { @@ -2360,7 +2813,9 @@ static int yaffs_PutChunkIntoFile(yaffs_Object *in,int chunkInInode, int chunkIn if(existingChunk <=0) { //Hoosterman - how did this happen? - // todo + + T(YAFFS_TRACE_ERROR, (TSTR("yaffs tragedy: existing chunk < 0 in scan" TENDSTR))); + } @@ -2375,13 +2830,13 @@ static int yaffs_PutChunkIntoFile(yaffs_Object *in,int chunkInInode, int chunkIn { // Use new // Delete the old one and drop through to update the tnode - yaffs_DeleteChunk(dev,existingChunk); + yaffs_DeleteChunk(dev,existingChunk,1); } else { // Use existing. // Delete the new one and return early so that the tnode isn't changed - yaffs_DeleteChunk(dev,chunkInNAND); + yaffs_DeleteChunk(dev,chunkInNAND,1); return YAFFS_OK; } } @@ -2410,13 +2865,14 @@ int yaffs_ReadChunkDataFromObject(yaffs_Object *in,int chunkInInode, __u8 *buffe } else { + memset(buffer,0,YAFFS_BYTES_PER_CHUNK); return 0; } } -static void yaffs_DeleteChunk(yaffs_Device *dev,int chunkId) +static void yaffs_DeleteChunk(yaffs_Device *dev,int chunkId,int markNAND) { int block; int page; @@ -2424,16 +2880,33 @@ static void yaffs_DeleteChunk(yaffs_Device *dev,int chunkId) yaffs_BlockInfo *bi; if(chunkId <= 0) return; - - block = chunkId / YAFFS_CHUNKS_PER_BLOCK; - page = chunkId % YAFFS_CHUNKS_PER_BLOCK; - yaffs_SpareInitialise(&spare); - spare.pageStatus = 0; // To mark it as deleted. + dev->nDeletions++; + block = chunkId / dev->nChunksPerBlock; + page = chunkId % dev->nChunksPerBlock; + + if(markNAND) + { + yaffs_SpareInitialise(&spare); + +#ifdef CONFIG_MTD_NAND_VERIFY_WRITE + + //read data before write, to ensure correct ecc + //if we're using MTD verification under Linux + yaffs_ReadChunkFromNAND(dev,chunkId,NULL,&spare,0); +#endif + spare.pageStatus = 0; // To mark it as deleted. + + + yaffs_WriteChunkToNAND(dev,chunkId,NULL,&spare); + yaffs_HandleUpdateChunk(dev,chunkId,&spare); + } + else + { + dev->nUnmarkedDeletions++; + } - yaffs_WriteChunkToNAND(dev,chunkId,NULL,&spare); - yaffs_HandleUpdateChunk(dev,chunkId,&spare); bi = yaffs_GetBlockInfo(dev,block); @@ -2444,7 +2917,7 @@ static void yaffs_DeleteChunk(yaffs_Device *dev,int chunkId) { dev->nFreeChunks++; - bi->pageBits &= ~(1 << page); + yaffs_ClearChunkBit(dev,block,page); bi->pagesInUse--; if(bi->pagesInUse == 0 && @@ -2492,36 +2965,6 @@ int yaffs_WriteChunkDataToObject(yaffs_Object *in,int chunkInInode, const __u8 * yaffs_CalcTagsECC(&newTags); - - #if 0 - // Create new chunk in NAND - newChunkId = yaffs_AllocatePage(dev,useReserve); - - - if(newChunkId >= 0) - { - - - yaffs_WriteChunkWithTagsToNAND(dev,newChunkId,buffer,&newTags); - - yaffs_PutChunkIntoFile(in,chunkInInode,newChunkId); - - - if(prevChunkId >= 0) - { - yaffs_DeleteChunk(dev,prevChunkId); - - } - - yaffs_CheckFileSanity(in); - - return newChunkId; - } - - - return -1; -#else - newChunkId = yaffs_WriteNewChunkWithTagsToNAND(dev,buffer,&newTags,useReserve); if(newChunkId >= 0) { @@ -2530,7 +2973,7 @@ int yaffs_WriteChunkDataToObject(yaffs_Object *in,int chunkInInode, const __u8 * if(prevChunkId >= 0) { - yaffs_DeleteChunk(dev,prevChunkId); + yaffs_DeleteChunk(dev,prevChunkId,1); } @@ -2538,7 +2981,7 @@ int yaffs_WriteChunkDataToObject(yaffs_Object *in,int chunkInInode, const __u8 * } return newChunkId; -#endif + @@ -2563,7 +3006,6 @@ int yaffs_UpdateObjectHeader(yaffs_Object *in,const char *name, int force) yaffs_ObjectHeader *oh = (yaffs_ObjectHeader *)bufferNew; yaffs_ObjectHeader *ohOld = (yaffs_ObjectHeader *)bufferOld; - yaffs_INVALIDATECHUNKCACHE(in); if(!in->fake || force) { @@ -2581,15 +3023,24 @@ int yaffs_UpdateObjectHeader(yaffs_Object *in,const char *name, int force) // Header data oh->type = in->variantType; - - oh->st_mode = in->st_mode; - oh->st_uid = in->st_uid; - oh->st_gid = in->st_gid; - oh->st_atime = in->st_atime; - oh->st_mtime = in->st_mtime; - oh->st_ctime = in->st_ctime; - oh->st_rdev = in->st_rdev; - + + oh->yst_mode = in->yst_mode; + +#ifdef CONFIG_YAFFS_WINCE + oh->win_atime[0] = in->win_atime[0]; + oh->win_ctime[0] = in->win_ctime[0]; + oh->win_mtime[0] = in->win_mtime[0]; + oh->win_atime[1] = in->win_atime[1]; + oh->win_ctime[1] = in->win_ctime[1]; + oh->win_mtime[1] = in->win_mtime[1]; +#else + oh->yst_uid = in->yst_uid; + oh->yst_gid = in->yst_gid; + oh->yst_atime = in->yst_atime; + oh->yst_mtime = in->yst_mtime; + oh->yst_ctime = in->yst_ctime; + oh->yst_rdev = in->yst_rdev; +#endif if(in->parent) { oh->parentObjectId = in->parent->objectId; @@ -2599,7 +3050,7 @@ int yaffs_UpdateObjectHeader(yaffs_Object *in,const char *name, int force) oh->parentObjectId = 0; } - oh->sum = in->sum; + //oh->sum = in->sum; if(name && *name) { memset(oh->name,0,YAFFS_MAX_NAME_LENGTH + 1); @@ -2647,32 +3098,9 @@ int yaffs_UpdateObjectHeader(yaffs_Object *in,const char *name, int force) yaffs_CalcTagsECC(&newTags); - - -#if 0 - // Create new chunk in NAND - newChunkId = yaffs_AllocatePage(dev,1); - - if(newChunkId >= 0) - { - yaffs_WriteChunkWithTagsToNAND(dev,newChunkId,bufferNew,&newTags); - - in->chunkId = newChunkId; - - if(prevChunkId >= 0) - { - yaffs_DeleteChunk(dev,prevChunkId); - } - - in->dirty = 0; - return newChunkId; - } - - return -1; -#else // Create new chunk in NAND - newChunkId = yaffs_WriteNewChunkWithTagsToNAND(dev,bufferNew,&newTags,1); + newChunkId = yaffs_WriteNewChunkWithTagsToNAND(dev,bufferNew,&newTags, (prevChunkId >= 0) ? 1 : 0 ); if(newChunkId >= 0) { @@ -2681,7 +3109,7 @@ int yaffs_UpdateObjectHeader(yaffs_Object *in,const char *name, int force) if(prevChunkId >= 0) { - yaffs_DeleteChunk(dev,prevChunkId); + yaffs_DeleteChunk(dev,prevChunkId,1); } in->dirty = 0; @@ -2689,122 +3117,291 @@ int yaffs_UpdateObjectHeader(yaffs_Object *in,const char *name, int force) return newChunkId; -#endif } return 0; } -/////////////////////// Short Read Cache //////////////////////////////// -// In many siturations where there is no high level buffering a lot of -// reads might be short sequential reads. eg. scanning a jpeg file. -// In these cases, a shoprt read cache can provide a huge perfomance benefit +/////////////////////// Short Operations Cache //////////////////////////////// +// In many siturations where there is no high level buffering (eg WinCE) a lot of +// reads might be short sequential reads, and a lot of writes may be short +// sequential writes. eg. scanning/writing a jpeg file. +// In these cases, a short read/write cache can provide a huge perfomance benefit // with dumb-as-a-rock code. -// There are a limited number (~10) of cache chunks per device +// There are a limited number (~10) of cache chunks per device so that we don't +// need a very intelligent search. -#ifdef CONFIG_YAFFS_SHORT_OP_CACHE -// Invalidate all the cache pages associated with this object -// Do this whenever ther file is modified... dumb as a rock remember! -static void yaffs_InvalidateChunkCache(yaffs_Object *in) + + +static void yaffs_FlushFilesChunkCache(yaffs_Object *obj) { + yaffs_Device *dev = obj->myDev; + int lowest; int i; - yaffs_Device *dev = in->myDev; - int id = in->objectId; + yaffs_ChunkCache *cache; + int chunkWritten = 0; + int nBytes; + int nCaches = obj->myDev->nShortOpCaches; - for(i = 0; i < YAFFS_N_CACHE_CHUNKS; i++) + if (nCaches > 0) { - if(dev->srCache[i].objectId == id) + do{ + cache = NULL; + + // Find the dirty cache for this object with the lowest chunk id. + for(i = 0; i < nCaches; i++) + { + if(dev->srCache[i].object == obj && + dev->srCache[i].dirty) + { + if(!cache || dev->srCache[i].chunkId < lowest) + { + cache = &dev->srCache[i]; + lowest = cache->chunkId; + } + } + } + + if(cache) + { + //Write it out + +#if 0 + nBytes = cache->object->variant.fileVariant.fileSize - ((cache->chunkId -1) * YAFFS_BYTES_PER_CHUNK); + + if(nBytes > YAFFS_BYTES_PER_CHUNK) + { + nBytes= YAFFS_BYTES_PER_CHUNK; + } +#endif + chunkWritten = yaffs_WriteChunkDataToObject(cache->object, + cache->chunkId, + cache->data, + cache->nBytes,1); + + cache->dirty = 0; + cache->object = NULL; + } + + } while(cache && chunkWritten > 0); + + if(cache) { - dev->srCache[i].objectId = 0; + //Hoosterman, disk full while writing cache out. + T(YAFFS_TRACE_ERROR, (TSTR("yaffs tragedy: no space during cache write" TENDSTR))); + } - } + } + } // Grab us a chunk for use. // First look for an empty one. -// Then look for the least recently used one. -static yaffs_ChunkCache *yaffs_GrabChunkCache(yaffs_Device *dev) +// Then look for the least recently used non-dirty one. +// Then look for the least recently used dirty one...., flush and look again. +static yaffs_ChunkCache *yaffs_GrabChunkCacheWorker(yaffs_Device *dev) { int i; int usage; int theOne; - for(i = 0; i < YAFFS_N_CACHE_CHUNKS; i++) + if(dev->nShortOpCaches > 0) { - if(dev->srCache[i].objectId == 0) + for(i = 0; i < dev->nShortOpCaches; i++) { - //T(("Grabbing empty %d\n",i)); + if(!dev->srCache[i].object) + { + //T(("Grabbing empty %d\n",i)); + + //printf("Grabbing empty %d\n",i); - return &dev->srCache[i]; + return &dev->srCache[i]; + } } - } - + + return NULL; - usage = dev->srCache[i].lastUse; - theOne = 0; + theOne = -1; + usage = 0; // just to stop the compiler grizzling - for(i = 1; i < YAFFS_N_CACHE_CHUNKS; i++) - { - if(dev->srCache[i].lastUse < usage) + for(i = 0; i < dev->nShortOpCaches; i++) { - usage = dev->srCache[i].lastUse; - theOne = i; + if(!dev->srCache[i].dirty && + ((dev->srCache[i].lastUse < usage && theOne >= 0)|| + theOne < 0)) + { + usage = dev->srCache[i].lastUse; + theOne = i; + } } + + //T(("Grabbing non-empty %d\n",theOne)); + + //if(theOne >= 0) printf("Grabbed non-empty cache %d\n",theOne); + + return theOne >= 0 ? &dev->srCache[theOne] : NULL; } + else + { + return NULL; + } + +} + + +static yaffs_ChunkCache *yaffs_GrabChunkCache(yaffs_Device *dev) +{ + yaffs_ChunkCache *cache; + yaffs_Object *theObj; + int usage; + int i; + int pushout; + + if(dev->nShortOpCaches > 0) + { + // Try find a non-dirty one... + + cache = yaffs_GrabChunkCacheWorker(dev); - //T(("Grabbing non-empty %d\n",theOne)); - return &dev->srCache[theOne]; + if(!cache) + { + // They were all dirty, find the last recently used object and flush + // its cache, then find again. + // NB what's here is not very accurate, we actually flush the object + // the last recently used page. + + theObj = dev->srCache[0].object; + usage = dev->srCache[0].lastUse; + cache = &dev->srCache[0]; + pushout = 0; + for(i = 1; i < dev->nShortOpCaches; i++) + { + if( dev->srCache[i].object && + dev->srCache[i].lastUse < usage) + { + usage = dev->srCache[i].lastUse; + theObj = dev->srCache[i].object; + cache = &dev->srCache[i]; + pushout = i; + } + } + + if(!cache || cache->dirty) + { + + //printf("Dirty "); + yaffs_FlushFilesChunkCache(theObj); + + // Try again + cache = yaffs_GrabChunkCacheWorker(dev); + } + else + { + //printf(" pushout %d\n",pushout); + } + + } + + return cache; + } + else + return NULL; + } // Find a cached chunk -static yaffs_ChunkCache *yaffs_FindChunkCache(yaffs_Device *dev, int objectId, int chunkId) +static yaffs_ChunkCache *yaffs_FindChunkCache(const yaffs_Object *obj, int chunkId) { + yaffs_Device *dev = obj->myDev; int i; -; - - for(i = 0; i < YAFFS_N_CACHE_CHUNKS; i++) + if(dev->nShortOpCaches > 0) { - if(dev->srCache[i].objectId == objectId && - dev->srCache[i].chunkId == chunkId) + for(i = 0; i < dev->nShortOpCaches; i++) { - dev->cacheHits++; + if(dev->srCache[i].object == obj && + dev->srCache[i].chunkId == chunkId) + { + dev->cacheHits++; - return &dev->srCache[i]; + return &dev->srCache[i]; + } } } - return NULL; } // Mark the chunk for the least recently used algorithym -static void yaffs_UseChunkCache(yaffs_Device *dev, yaffs_ChunkCache *cache) +static void yaffs_UseChunkCache(yaffs_Device *dev, yaffs_ChunkCache *cache, int isAWrite) { - if( dev->srLastUse < 0 || - dev->srLastUse > 1000000) + + if(dev->nShortOpCaches > 0) { - // Reset the cache usages - int i; - for(i = 1; i < YAFFS_N_CACHE_CHUNKS; i++) + if( dev->srLastUse < 0 || + dev->srLastUse > 100000000) { - dev->srCache[i].lastUse = 0; + // Reset the cache usages + int i; + for(i = 1; i < dev->nShortOpCaches; i++) + { + dev->srCache[i].lastUse = 0; + } + dev->srLastUse = 0; } - dev->srLastUse = 0; - } - dev->srLastUse++; + dev->srLastUse++; - cache->lastUse = dev->srLastUse; + cache->lastUse = dev->srLastUse; + if(isAWrite) + { + cache->dirty = 1; + } + } } +// Invalidate a single cache page. +// Do this when a whole page gets written, +// ie the short cache for this page is no longer valid. +static void yaffs_InvalidateChunkCache(yaffs_Object *object, int chunkId) +{ + if(object->myDev->nShortOpCaches > 0) + { + yaffs_ChunkCache *cache = yaffs_FindChunkCache(object,chunkId); + + if(cache) + { + cache->object = NULL; + } + } +} + + +// Invalidate all the cache pages associated with this object +// Do this whenever ther file is deleted or resized. +static void yaffs_InvalidateWholeChunkCache(yaffs_Object *in) +{ + int i; + yaffs_Device *dev = in->myDev; + + if(dev->nShortOpCaches > 0) + { + // Now invalidate it. + for(i = 0; i < dev->nShortOpCaches; i++) + { + if(dev->srCache[i].object == in) + { + dev->srCache[i].object = NULL; + } + } + } +} -#endif @@ -2820,19 +3417,17 @@ static void yaffs_UseChunkCache(yaffs_Device *dev, yaffs_ChunkCache *cache) int yaffs_ReadDataFromFile(yaffs_Object *in, __u8 * buffer, __u32 offset, int nBytes) { -// yaffs_Device *dev = in->myDev; - -#ifdef CONFIG_YAFFS_SHORT_OP_CACHE - yaffs_ChunkCache *cache; -#endif - - __u8 localBuffer[YAFFS_BYTES_PER_CHUNK]; int chunk; int start; int nToCopy; int n = nBytes; int nDone = 0; + yaffs_ChunkCache *cache; + + yaffs_Device *dev; + + dev = in->myDev; while(n > 0) { @@ -2850,36 +3445,48 @@ int yaffs_ReadDataFromFile(yaffs_Object *in, __u8 * buffer, __u32 offset, int nB nToCopy = YAFFS_BYTES_PER_CHUNK - start; } - if(nToCopy != YAFFS_BYTES_PER_CHUNK) + cache = yaffs_FindChunkCache(in,chunk); + + // If the chunk is already in the cache or it is less than a whole chunk + // then use the cache (if there is caching) + // else bypass the cache. + if( cache || nToCopy != YAFFS_BYTES_PER_CHUNK) { - // An incomplete start or end chunk (or maybe both start and end chunk) -#ifdef CONFIG_YAFFS_SHORT_OP_CACHE - // If we can't find the data in the cache, then load it up. - cache = yaffs_FindChunkCache(in->myDev,in->objectId,chunk); - if(!cache) + if(dev->nShortOpCaches > 0) { - cache = yaffs_GrabChunkCache(in->myDev); - cache->objectId = in->objectId; - cache->chunkId = chunk; - yaffs_ReadChunkDataFromObject(in,chunk,cache->data); - } + + // If we can't find the data in the cache, then load it up. + + if(!cache) + { + cache = yaffs_GrabChunkCache(in->myDev); + cache->object = in; + cache->chunkId = chunk; + cache->dirty = 0; + yaffs_ReadChunkDataFromObject(in,chunk,cache->data); + cache->nBytes = 0; + } - yaffs_UseChunkCache(in->myDev,cache); + yaffs_UseChunkCache(dev,cache,0); + + memcpy(buffer,&cache->data[start],nToCopy); + } + else + { + // Read into the local buffer then copy... + yaffs_ReadChunkDataFromObject(in,chunk,dev->localBuffer); + memcpy(buffer,&dev->localBuffer[start],nToCopy); + } - memcpy(buffer,&cache->data[start],nToCopy); -#else - // Read into the local buffer then copy... - yaffs_ReadChunkDataFromObject(in,chunk,localBuffer); - memcpy(buffer,&localBuffer[start],nToCopy); -#endif } else { -#ifdef WIN32 +#ifdef CONFIG_YAFFS_WINCE + // Under WinCE can't do direct transfer. Need to use a local buffer. // This is because we otherwise screw up WinCE's memory mapper - yaffs_ReadChunkDataFromObject(in,chunk,localBuffer); - memcpy(buffer,localBuffer,YAFFS_BYTES_PER_CHUNK); + yaffs_ReadChunkDataFromObject(in,chunk,dev->localBuffer); + memcpy(buffer,dev->localBuffer,YAFFS_BYTES_PER_CHUNK); #else // A full chunk. Read directly into the supplied buffer. yaffs_ReadChunkDataFromObject(in,chunk,buffer); @@ -2897,9 +3504,9 @@ 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) { - __u8 localBuffer[YAFFS_BYTES_PER_CHUNK]; int chunk; int start; @@ -2907,10 +3514,14 @@ int yaffs_WriteDataToFile(yaffs_Object *in,const __u8 * buffer, __u32 offset, in int n = nBytes; int nDone = 0; int nToWriteBack; - int endOfWrite = offset+nBytes; + int startOfWrite = offset; int chunkWritten = 0; + int nBytesRead; + + yaffs_Device *dev; + + dev = in->myDev; - yaffs_INVALIDATECHUNKCACHE(in); while(n > 0 && chunkWritten >= 0) { @@ -2920,10 +3531,24 @@ 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) < YAFFS_BYTES_PER_CHUNK) { nToCopy = n; - nToWriteBack = (start + n); + + // Now folks, to calculate how many bytes to write back.... + // If we're overwriting and not writing to then end of file then + // we need to write back as much as was there before. + + nBytesRead = in->variant.fileVariant.fileSize - ((chunk -1) * YAFFS_BYTES_PER_CHUNK); + + if(nBytesRead > YAFFS_BYTES_PER_CHUNK) + { + nBytesRead = YAFFS_BYTES_PER_CHUNK; + } + + nToWriteBack = (nBytesRead > (start + n)) ? nBytesRead : (start +n); + } else { @@ -2934,29 +3559,60 @@ int yaffs_WriteDataToFile(yaffs_Object *in,const __u8 * buffer, __u32 offset, in if(nToCopy != YAFFS_BYTES_PER_CHUNK) { // An incomplete start or end chunk (or maybe both start and end chunk) - // Read into the local buffer then copy, then copy over and write back. + 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); + if(!cache && yaffs_CheckSpaceForChunkCache(in->myDev)) + { + cache = yaffs_GrabChunkCache(in->myDev); + cache->object = in; + cache->chunkId = chunk; + cache->dirty = 0; + yaffs_ReadChunkDataFromObject(in,chunk,cache->data); + } + + if(cache) + { + yaffs_UseChunkCache(dev,cache,1); + memcpy(&cache->data[start],buffer,nToCopy); + cache->nBytes = nToWriteBack; + } + else + { + chunkWritten = -1; // fail the write + } + } + else + { + // An incomplete start or end chunk (or maybe both start and end chunk) + // Read into the local buffer then copy, then copy over and write back. - yaffs_ReadChunkDataFromObject(in,chunk,localBuffer); + yaffs_ReadChunkDataFromObject(in,chunk,dev->localBuffer); - memcpy(&localBuffer[start],buffer,nToCopy); + memcpy(&dev->localBuffer[start],buffer,nToCopy); - chunkWritten = yaffs_WriteChunkDataToObject(in,chunk,localBuffer,nToWriteBack,0); + chunkWritten = yaffs_WriteChunkDataToObject(in,chunk,dev->localBuffer,nToWriteBack,0); - //T(("Write with readback to chunk %d %d\n",chunk,chunkWritten)); + //T(("Write with readback to chunk %d %d start %d copied %d wrote back %d\n",chunk,chunkWritten,start, nToCopy, nToWriteBack)); + } } else { -#ifdef WIN32 +#ifdef CONFIG_YAFFS_WINCE // Under WinCE can't do direct transfer. Need to use a local buffer. // This is because we otherwise screw up WinCE's memory mapper - memcpy(localBuffer,buffer,YAFFS_BYTES_PER_CHUNK); - chunkWritten = yaffs_WriteChunkDataToObject(in,chunk,localBuffer,YAFFS_BYTES_PER_CHUNK,0); + memcpy(dev->localBuffer,buffer,YAFFS_BYTES_PER_CHUNK); + chunkWritten = yaffs_WriteChunkDataToObject(in,chunk,dev->localBuffer,YAFFS_BYTES_PER_CHUNK,0); #else // A full chunk. Write directly from the supplied buffer. chunkWritten = yaffs_WriteChunkDataToObject(in,chunk,buffer,YAFFS_BYTES_PER_CHUNK,0); #endif + // Since we've overwritten the cached data, we better invalidate it. + yaffs_InvalidateChunkCache(in,chunk); //T(("Write to chunk %d %d\n",chunk,chunkWritten)); } @@ -2972,13 +3628,12 @@ int yaffs_WriteDataToFile(yaffs_Object *in,const __u8 * buffer, __u32 offset, in // Update file object - if(endOfWrite > in->variant.fileVariant.fileSize) + if((startOfWrite + nDone) > in->variant.fileVariant.fileSize) { - in->variant.fileVariant.fileSize = endOfWrite; + in->variant.fileVariant.fileSize = (startOfWrite + nDone); } in->dirty = 1; - /*in->st_mtime = CURRENT_TIME; only update in flush*/ return nDone; } @@ -2993,9 +3648,9 @@ int yaffs_ResizeFile(yaffs_Object *in, int newSize) yaffs_Device *dev = in->myDev; - __u8 localBuffer[YAFFS_BYTES_PER_CHUNK]; - yaffs_INVALIDATECHUNKCACHE(in); + yaffs_FlushFilesChunkCache(in); + yaffs_InvalidateWholeChunkCache(in); if(in->variantType != YAFFS_OBJECT_TYPE_FILE) { @@ -3019,14 +3674,15 @@ int yaffs_ResizeFile(yaffs_Object *in, int newSize) // using yaffs_DeleteChunk chunkId = yaffs_FindAndDeleteChunkInFile(in,i,NULL); - if(chunkId <= 0 || chunkId >= (dev->endBlock * 32)) + if(chunkId < (dev->internalStartBlock * dev->nChunksPerBlock) || + chunkId >= ((dev->internalEndBlock+1) * dev->nChunksPerBlock)) { //T(("Found daft chunkId %d for %d\n",chunkId,i)); } else { in->nDataChunks--; - yaffs_DeleteChunk(dev,chunkId); + yaffs_DeleteChunk(dev,chunkId,1); } } @@ -3036,9 +3692,11 @@ int yaffs_ResizeFile(yaffs_Object *in, int newSize) int lastChunk = 1+ newSize/YAFFS_BYTES_PER_CHUNK; // Got to read and rewrite the last chunk with its new size. - yaffs_ReadChunkDataFromObject(in,lastChunk,localBuffer); - - yaffs_WriteChunkDataToObject(in,lastChunk,localBuffer,sizeOfPartialChunk,1); + // NB Got to zero pad to nuke old data + yaffs_ReadChunkDataFromObject(in,lastChunk,dev->localBuffer); + memset(dev->localBuffer + sizeOfPartialChunk,0, YAFFS_BYTES_PER_CHUNK - sizeOfPartialChunk); + + yaffs_WriteChunkDataToObject(in,lastChunk,dev->localBuffer,sizeOfPartialChunk,1); } @@ -3076,16 +3734,24 @@ loff_t yaffs_GetFileSize(yaffs_Object *obj) // yaffs_FlushFile() updates the file's // objectId in NAND -int yaffs_FlushFile(yaffs_Object *in) +int yaffs_FlushFile(yaffs_Object *in, int updateTime) { int retVal; if(in->dirty) { //T(("flushing object header\n")); - - in->st_mtime = CURRENT_TIME; + + yaffs_FlushFilesChunkCache(in); + if(updateTime) + { +#ifdef CONFIG_YAFFS_WINCE + yfsd_WinFileTimeNow(in->win_mtime); +#else + in->yst_mtime = Y_CURRENT_TIME; +#endif + } - retVal = yaffs_UpdateObjectHeader(in,NULL,0); + retVal = (yaffs_UpdateObjectHeader(in,NULL,0) >= 0)? YAFFS_OK : YAFFS_FAIL; } else { @@ -3099,15 +3765,21 @@ int yaffs_FlushFile(yaffs_Object *in) static int yaffs_DoGenericObjectDeletion(yaffs_Object *in) { - yaffs_INVALIDATECHUNKCACHE(in); + + // First off, invalidate the file's data in the cache, without flushing. + yaffs_InvalidateWholeChunkCache(in); + yaffs_RemoveObjectFromDirectory(in); - yaffs_DeleteChunk(in->myDev,in->chunkId); -#if __KERNEL__ + yaffs_DeleteChunk(in->myDev,in->chunkId,1); + in->chunkId = -1; +#if 0 +#ifdef __KERNEL__ if(in->myInode) { in->myInode->u.generic_ip = NULL; - in->myInode = 0; + in->myInode = NULL; } +#endif #endif yaffs_FreeObject(in); return YAFFS_OK; @@ -3121,13 +3793,11 @@ static int yaffs_UnlinkFile(yaffs_Object *in) { #ifdef CONFIG_YAFFS_DISABLE_BACKGROUND_DELETION + // Delete the file data & tnodes -#if 0 - yaffs_ResizeFile(in,0); -#else - yaffs_DeleteWorker(in, in->variant.fileVariant.top, in->variant.fileVariant.topLevel, 0,NULL); -#endif + yaffs_DeleteWorker(in, in->variant.fileVariant.top, in->variant.fileVariant.topLevel, 0,NULL); + yaffs_FreeTnode(in->myDev,in->variant.fileVariant.top); @@ -3135,20 +3805,24 @@ static int yaffs_UnlinkFile(yaffs_Object *in) #else int retVal; int immediateDeletion=0; - retVal = yaffs_ChangeObjectName(in, in->myDev->unlinkedDir,NULL); - if(retVal == YAFFS_OK) + retVal = yaffs_ChangeObjectName(in, in->myDev->unlinkedDir,NULL,0); + if(1 || // Ignore the result of the change name. This will only fail + // if the disk was completely full (an error condition) + // We ignore the error so we can delete files to recover the disk + retVal == YAFFS_OK) { //in->unlinked = 1; //in->myDev->nUnlinkedFiles++; //in->renameAllowed = 0; #ifdef __KERNEL__ - if(in->myInode) + if(!in->myInode) { + // Might be open at present, + // Caught by delete_inode in yaffs_fs.c immediateDeletion = 1; } -#endif -#if WIN32 +#else if(in->inUse <= 0) { immediateDeletion = 1; @@ -3158,9 +3832,10 @@ static int yaffs_UnlinkFile(yaffs_Object *in) if(immediateDeletion) { - T((TSTR("yaffs: immediate deletion of file %d" TENDSTR),in->objectId)); + T(YAFFS_TRACE_TRACING,(TSTR("yaffs: immediate deletion of file %d" TENDSTR),in->objectId)); in->deleted=1; in->myDev->nDeletedFiles++; + yaffs_SoftDeleteFile(in); } } @@ -3173,18 +3848,33 @@ static int yaffs_UnlinkFile(yaffs_Object *in) int yaffs_DeleteFile(yaffs_Object *in) { int retVal = YAFFS_OK; - if(!in->unlinked) + + if(in->nDataChunks > 0) { - retVal = yaffs_UnlinkFile(in); + // Use soft deletion + if(!in->unlinked) + { + retVal = yaffs_UnlinkFile(in); + } + if(retVal == YAFFS_OK && + in->unlinked && + !in->deleted) + { + in->deleted = 1; + in->myDev->nDeletedFiles++; + yaffs_SoftDeleteFile(in); + } + return in->deleted ? YAFFS_OK : YAFFS_FAIL; } - if(retVal == YAFFS_OK && - in->unlinked && - !in->deleted) + else { - in->deleted = 1; - in->myDev->nDeletedFiles++; + // The file has no data chunks so we toss it immediately + yaffs_FreeTnode(in->myDev,in->variant.fileVariant.top); + in->variant.fileVariant.top = NULL; + yaffs_DoGenericObjectDeletion(in); + + return YAFFS_OK; } - return in->deleted ? YAFFS_OK : YAFFS_FAIL; } static int yaffs_DeleteDirectory(yaffs_Object *in) @@ -3215,6 +3905,20 @@ static int yaffs_DeleteHardLink(yaffs_Object *in) } +static void yaffs_AbortHalfCreatedObject(yaffs_Object *obj) +{ + switch(obj->variantType) + { + case YAFFS_OBJECT_TYPE_FILE: yaffs_DeleteFile(obj); break; + case YAFFS_OBJECT_TYPE_DIRECTORY: yaffs_DeleteDirectory(obj); break; + case YAFFS_OBJECT_TYPE_SYMLINK: yaffs_DeleteSymLink(obj); break; + case YAFFS_OBJECT_TYPE_HARDLINK: yaffs_DeleteHardLink(obj); break; + case YAFFS_OBJECT_TYPE_SPECIAL: yaffs_DoGenericObjectDeletion(obj); break; + case YAFFS_OBJECT_TYPE_UNKNOWN: break; // should not happen. + } +} + + static int yaffs_UnlinkWorker(yaffs_Object *obj) { @@ -3225,87 +3929,6 @@ static int yaffs_UnlinkWorker(yaffs_Object *obj) } else if(!list_empty(&obj->hardLinks)) { -#if 0 - // Curve ball: We're unlinking an object that has a hardlink. - // Therefore we can't really delete the object. - // Instead, we do the following: - // - Select a hardlink. - // - Re-type a hardlink as the equivalent object and populate the fields, including the - // objectId. Updating the object id is important so that all the hardlinks do not need - // to be rewritten. - // - Update the equivalet object pointers. - // - Delete all object. - - yaffs_Object *hl; - struct list_head *i; - - - yaffs_RemoveObjectFromDirectory(obj); - - - - hl = list_entry(obj->hardLinks.next, yaffs_Object,hardLinks); - - hl->dirty = 1; - hl->st_mode = obj->st_mode; - hl->st_uid = obj->st_uid; - hl->st_gid = obj->st_gid; - hl->st_atime = obj->st_atime; - hl->st_mtime = obj->st_mtime; - hl->st_ctime = obj->st_ctime; - hl->st_rdev = obj->st_rdev; - - hl->variantType = obj->variantType; - - switch(hl->variantType) - { - case YAFFS_OBJECT_TYPE_FILE: - case YAFFS_OBJECT_TYPE_SYMLINK: - case YAFFS_OBJECT_TYPE_SPECIAL: - // These types are OK to just copy across. - hl->variant = obj->variant; - break; - case YAFFS_OBJECT_TYPE_DIRECTORY: - // Fix the list up - list_add(&hl->variant.directoryVariant.children, - &obj->variant.directoryVariant.children); - list_del(&obj->variant.directoryVariant.children); - - // Now change all the directory children to point to the new parent. - list_for_each(i,&hl->variant.directoryVariant.children) - { - list_entry(i,yaffs_Object,siblings)->parent = hl; - } - break; - - case YAFFS_OBJECT_TYPE_HARDLINK: - case YAFFS_OBJECT_TYPE_UNKNOWN: - // Should not be either of these types. - } - - // Now fix up the hardlink chain - list_del(&obj->hardLinks); - - list_for_each(i,&hl->hardLinks) - { - list_entry(i,yaffs_Object,hardLinks)->variant.hardLinkVariant.equivalentObject = hl; - list_entry(i,yaffs_Object,hardLinks)->variant.hardLinkVariant.equivalentObjectId = hl->objectId; - } - - // Now fix up the hash links. - yaffs_UnhashObject(hl); - hl->objectId = obj->objectId; - yaffs_HashObject(hl); - - // Update the hardlink which has become an object - yaffs_UpdateObjectHeader(hl,NULL,0); - - // Finally throw away the deleted object - yaffs_DeleteChunk(obj->myDev,obj->chunkId); - yaffs_FreeObject(obj); - - return YAFFS_OK; -#else // Curve ball: We're unlinking an object that has a hardlink. // // This problem arises because we are not strictly following @@ -3331,16 +3954,13 @@ static int yaffs_UnlinkWorker(yaffs_Object *obj) yaffs_GetObjectName(hl,name,YAFFS_MAX_NAME_LENGTH+1); - retVal = yaffs_ChangeObjectName(obj, hl->parent, name); + retVal = yaffs_ChangeObjectName(obj, hl->parent, name,0); if(retVal == YAFFS_OK) { retVal = yaffs_DoGenericObjectDeletion(hl); } return retVal; - -#endif - } else @@ -3356,6 +3976,9 @@ 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: @@ -3393,7 +4016,7 @@ static int yaffs_IsBlockBad(yaffs_Device *dev, int blk) { yaffs_Spare spare; - yaffs_ReadChunkFromNAND(dev,blk * YAFFS_CHUNKS_PER_BLOCK,NULL,&spare,1); + yaffs_ReadChunkFromNAND(dev,blk * dev->nChunksPerBlock,NULL,&spare,1); #if 1 if(yaffs_CountBits(spare.blockStatus) < 7) { @@ -3405,7 +4028,7 @@ static int yaffs_IsBlockBad(yaffs_Device *dev, int blk) return 1; } #endif - yaffs_ReadChunkFromNAND(dev,blk * YAFFS_CHUNKS_PER_BLOCK + 1,NULL,&spare,1); + yaffs_ReadChunkFromNAND(dev,blk * dev->nChunksPerBlock + 1,NULL,&spare,1); #if 1 if(yaffs_CountBits(spare.blockStatus) < 7) @@ -3446,28 +4069,29 @@ static int yaffs_Scan(yaffs_Device *dev) // Scan all the blocks... - for(blk = dev->startBlock; blk <= dev->endBlock; blk++) + for(blk = dev->internalStartBlock; blk <= dev->internalEndBlock; blk++) { deleted = 0; bi = yaffs_GetBlockInfo(dev,blk); - bi->pageBits = 0; + yaffs_ClearChunkBits(dev,blk); bi->pagesInUse = 0; + bi->softDeletions = 0; state = YAFFS_BLOCK_STATE_SCANNING; if(yaffs_IsBlockBad(dev,blk)) { state = YAFFS_BLOCK_STATE_DEAD; - T((TSTR("block %d is bad" TENDSTR),blk)); + T(YAFFS_TRACE_BAD_BLOCKS,(TSTR("block %d is bad" TENDSTR),blk)); } // Read each chunk in the block. - for(c = 0; c < YAFFS_CHUNKS_PER_BLOCK && + for(c = 0; c < dev->nChunksPerBlock && state == YAFFS_BLOCK_STATE_SCANNING; c++) { // Read the spare area and decide what to do - chunk = blk * YAFFS_CHUNKS_PER_BLOCK + c; + chunk = blk * dev->nChunksPerBlock + c; yaffs_ReadChunkFromNAND(dev,chunk,NULL,&spare,1); @@ -3497,19 +4121,19 @@ static int yaffs_Scan(yaffs_Device *dev) else { // this is the block being allocated from - T((TSTR(" Allocating from %d %d" TENDSTR),blk,c)); + T(YAFFS_TRACE_SCAN,(TSTR(" Allocating from %d %d" TENDSTR),blk,c)); state = YAFFS_BLOCK_STATE_ALLOCATING; dev->allocationBlock = blk; dev->allocationPage = c; } - dev->nFreeChunks += (YAFFS_CHUNKS_PER_BLOCK - c); + dev->nFreeChunks += (dev->nChunksPerBlock - c); } else if(tags.chunkId > 0) { int endpos; // A data chunk. - bi->pageBits |= (1 << c); + yaffs_SetChunkBit(dev,blk,c); bi->pagesInUse++; in = yaffs_FindOrCreateObjectByNumber(dev,tags.objectId,YAFFS_OBJECT_TYPE_FILE); @@ -3532,7 +4156,7 @@ static int yaffs_Scan(yaffs_Device *dev) { // chunkId == 0, so it is an ObjectHeader. // Thus, we read in the object header and make the object - bi->pageBits |= (1 << c); + yaffs_SetChunkBit(dev,blk,c); bi->pagesInUse++; yaffs_ReadChunkFromNAND(dev,chunk,chunkData,NULL,1); @@ -3551,13 +4175,13 @@ static int yaffs_Scan(yaffs_Device *dev) if(((existingSerial+1) & 3) == newSerial) { // Use new one - destroy the exisiting one - yaffs_DeleteChunk(dev,in->chunkId); + yaffs_DeleteChunk(dev,in->chunkId,1); in->valid = 0; } else { // Use existing - destroy this one. - yaffs_DeleteChunk(dev,chunk); + yaffs_DeleteChunk(dev,chunk,1); } } @@ -3569,13 +4193,22 @@ static int yaffs_Scan(yaffs_Device *dev) in->valid = 1; in->variantType = oh->type; - in->st_mode = oh->st_mode; - 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; + in->yst_mode = oh->yst_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->yst_uid = oh->yst_uid; + in->yst_gid = oh->yst_gid; + in->yst_atime = oh->yst_atime; + in->yst_mtime = oh->yst_mtime; + in->yst_ctime = oh->yst_ctime; + in->yst_rdev = oh->yst_rdev; +#endif in->chunkId = chunk; } @@ -3586,16 +4219,25 @@ static int yaffs_Scan(yaffs_Device *dev) in->valid = 1; in->variantType = oh->type; - in->st_mode = oh->st_mode; - 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; + in->yst_mode = oh->yst_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->yst_uid = oh->yst_uid; + in->yst_gid = oh->yst_gid; + in->yst_atime = oh->yst_atime; + in->yst_mtime = oh->yst_mtime; + in->yst_ctime = oh->yst_ctime; + in->yst_rdev = oh->yst_rdev; +#endif in->chunkId = chunk; - in->sum = oh->sum; + yaffs_SetObjectName(in,oh->name); in->dirty = 0; // directory stuff... @@ -3612,7 +4254,10 @@ static int yaffs_Scan(yaffs_Device *dev) { // Hoosterman, another problem.... // We're trying to use a non-directory as a directory - // Todo ... handle + + 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); @@ -3639,7 +4284,7 @@ static int yaffs_Scan(yaffs_Device *dev) break; case YAFFS_OBJECT_TYPE_HARDLINK: in->variant.hardLinkVariant.equivalentObjectId = oh->equivalentObjectId; - (yaffs_Object *)(in->hardLinks.next) = hardList; + in->hardLinks.next = (struct list_head *)hardList; hardList = in; break; case YAFFS_OBJECT_TYPE_DIRECTORY: // Do nothing @@ -3699,6 +4344,24 @@ static int yaffs_Scan(yaffs_Device *dev) } + { + 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); + if(l->deleted) + { + yaffs_SoftDeleteFile(l); + } + } + } + } return YAFFS_OK; @@ -3753,26 +4416,28 @@ yaffs_Object *yaffs_FindObjectByName(yaffs_Object *directory,const char *name) list_for_each(i,&directory->variant.directoryVariant.children) { - l = list_entry(i, yaffs_Object,siblings); - - // Special case for lost-n-found - if(l->objectId == YAFFS_OBJECTID_LOSTNFOUND) + if(i) { - if(yaffs_strcmp(name,YAFFS_LOSTNFOUND_NAME) == 0) + l = list_entry(i, yaffs_Object,siblings); + + // Special case for lost-n-found + if(l->objectId == YAFFS_OBJECTID_LOSTNFOUND) { - return l; + if(yaffs_strcmp(name,YAFFS_LOSTNFOUND_NAME) == 0) + { + return l; + } } - } - else if(yaffs_SumCompare(l->sum, sum)) - { - // Do a real check - yaffs_GetObjectName(l,buffer,YAFFS_MAX_NAME_LENGTH); - if(yaffs_strcmp(name,buffer) == 0) + else if(yaffs_SumCompare(l->sum, sum)) { - return l; - } - + // Do a real check + yaffs_GetObjectName(l,buffer,YAFFS_MAX_NAME_LENGTH); + if(yaffs_strcmp(name,buffer) == 0) + { + return l; + } + } } } @@ -3788,10 +4453,13 @@ int yaffs_ApplyToDirectoryChildren(yaffs_Object *theDir,int (*fn)(yaffs_Object * list_for_each(i,&theDir->variant.directoryVariant.children) { - l = list_entry(i, yaffs_Object,siblings); - if(!fn(l)) + if(i) { - return YAFFS_FAIL; + l = list_entry(i, yaffs_Object,siblings); + if(l && !fn(l)) + { + return YAFFS_FAIL; + } } } @@ -3830,6 +4498,12 @@ int yaffs_GetObjectName(yaffs_Object *obj,char *name,int buffSize) strncpy(name,locName,buffSize - 1); } +#ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM + else if(obj->shortName[0]) + { + strcpy(name,obj->shortName); + } +#endif else { __u8 buffer[YAFFS_BYTES_PER_CHUNK]; @@ -3904,10 +4578,10 @@ unsigned yaffs_GetObjectType(yaffs_Object *obj) case YAFFS_OBJECT_TYPE_SYMLINK: return DT_LNK; break; case YAFFS_OBJECT_TYPE_HARDLINK: return DT_REG; break; case YAFFS_OBJECT_TYPE_SPECIAL: - if(S_ISFIFO(obj->st_mode)) return DT_FIFO; - if(S_ISCHR(obj->st_mode)) return DT_CHR; - if(S_ISBLK(obj->st_mode)) return DT_BLK; - if(S_ISSOCK(obj->st_mode)) return DT_SOCK; + if(S_ISFIFO(obj->yst_mode)) return DT_FIFO; + if(S_ISCHR(obj->yst_mode)) return DT_CHR; + if(S_ISBLK(obj->yst_mode)) return DT_BLK; + if(S_ISSOCK(obj->yst_mode)) return DT_SOCK; default: return DT_REG; break; } } @@ -3925,18 +4599,20 @@ char *yaffs_GetSymlinkAlias(yaffs_Object *obj) } } +#ifndef CONFIG_YAFFS_WINCE int yaffs_SetAttributes(yaffs_Object *obj, struct iattr *attr) { unsigned int valid = attr->ia_valid; - if(valid & ATTR_MODE) obj->st_mode = attr->ia_mode; - if(valid & ATTR_UID) obj->st_uid = attr->ia_uid; - if(valid & ATTR_GID) obj->st_gid = attr->ia_gid; + if(valid & ATTR_MODE) obj->yst_mode = attr->ia_mode; + if(valid & ATTR_UID) obj->yst_uid = attr->ia_uid; + if(valid & ATTR_GID) obj->yst_gid = attr->ia_gid; - if(valid & ATTR_ATIME) obj->st_atime = attr->ia_atime; - if(valid & ATTR_CTIME) obj->st_ctime = attr->ia_ctime; - if(valid & ATTR_MTIME) obj->st_mtime = attr->ia_mtime; + if(valid & ATTR_ATIME) obj->yst_atime = Y_TIME_CONVERT(attr->ia_atime); + if(valid & ATTR_CTIME) obj->yst_ctime = Y_TIME_CONVERT(attr->ia_ctime); + if(valid & ATTR_MTIME) obj->yst_mtime = Y_TIME_CONVERT(attr->ia_mtime); + if(valid & ATTR_SIZE) yaffs_ResizeFile(obj,attr->ia_size); @@ -3945,18 +4621,20 @@ int yaffs_SetAttributes(yaffs_Object *obj, struct iattr *attr) return YAFFS_OK; } + int yaffs_GetAttributes(yaffs_Object *obj, struct iattr *attr) { unsigned int valid = 0; - attr->ia_mode = obj->st_mode; valid |= ATTR_MODE; - attr->ia_uid = obj->st_uid; valid |= ATTR_UID; - attr->ia_gid = obj->st_gid; valid |= ATTR_GID; + attr->ia_mode = obj->yst_mode; valid |= ATTR_MODE; + attr->ia_uid = obj->yst_uid; valid |= ATTR_UID; + attr->ia_gid = obj->yst_gid; valid |= ATTR_GID; - attr->ia_atime = obj->st_atime; valid |= ATTR_ATIME; - attr->ia_ctime = obj->st_ctime; valid |= ATTR_CTIME; - attr->ia_mtime = obj->st_mtime; valid |= ATTR_MTIME; + Y_TIME_CONVERT(attr->ia_atime) = obj->yst_atime; valid |= ATTR_ATIME; + Y_TIME_CONVERT(attr->ia_ctime) = obj->yst_ctime; valid |= ATTR_CTIME; + Y_TIME_CONVERT(attr->ia_mtime) = obj->yst_mtime; valid |= ATTR_MTIME; + attr->ia_size = yaffs_GetFileSize(obj); valid |= ATTR_SIZE; attr->ia_valid = valid; @@ -3965,7 +4643,7 @@ int yaffs_GetAttributes(yaffs_Object *obj, struct iattr *attr) } - +#endif int yaffs_DumpObject(yaffs_Object *obj) { @@ -3982,7 +4660,7 @@ int yaffs_DumpObject(yaffs_Object *obj) yaffs_GetObjectName(obj,name,256); - YPRINTF(("Object %d, inode %d \"%s\"\n dirty %d valid %d serial %d sum %d chunk %d type %d size %d\n", + 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), obj->objectId,yaffs_GetObjectInode(obj), name, obj->dirty, obj->valid, obj->serial, obj->sum, obj->chunkId, yaffs_GetObjectType(obj), yaffs_GetObjectFileLength(obj))); @@ -4020,31 +4698,69 @@ int yaffs_GutsInitialise(yaffs_Device *dev) int extraBits; int nBlocks; + if( dev->nBytesPerChunk != YAFFS_BYTES_PER_CHUNK || + dev->nChunksPerBlock < 2 || + dev->nReservedBlocks < 2 || + dev->startBlock < 0 || + dev->endBlock <= 0 || + dev->endBlock <= (dev->startBlock + dev->nReservedBlocks) + ) + { + //these parameters must be set before stating yaffs + // Other parameters internalStartBlock, + return YAFFS_FAIL; + } + if(!yaffs_CheckStructures()) { - YPRINTF(("yaffs_CheckStructures failed\n")); + T(YAFFS_TRACE_ALWAYS,(TSTR("yaffs_CheckStructures failed\n" TENDSTR))); return YAFFS_FAIL; } - - if(dev->startBlock <= 0 || + + if(dev->isMounted) + { + T(YAFFS_TRACE_ALWAYS,(TSTR("yaffs: device already mounted\n" TENDSTR))); + return YAFFS_FAIL; + } + + dev->isMounted = 1; + + if(dev->startBlock < 0 || (dev->endBlock - dev->startBlock) < 10) { - YPRINTF(("startBlock %d or endBlock %d invalid\n", + T(YAFFS_TRACE_ALWAYS,(TSTR("startBlock %d or endBlock %d invalid\n" TENDSTR), dev->startBlock, dev->endBlock)); return YAFFS_FAIL; } - nBlocks = dev->endBlock - dev->startBlock + 1; + + // Do we need to add an offset to use block 0? + + dev->internalStartBlock = dev->startBlock; + dev->internalEndBlock = dev->endBlock; + dev->blockOffset = 0; + dev->chunkOffset = 0; + + if(dev->startBlock == 0) + { + dev->internalStartBlock++; + dev->internalEndBlock++; + dev->blockOffset++; + dev->chunkOffset = dev->nChunksPerBlock; + } + + + 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 = YAFFS_CHUNKS_PER_BLOCK * (dev->endBlock+1); + x = dev->nChunksPerBlock * (dev->internalEndBlock+1); for(bits = extraBits = 0; x > 1; bits++) { @@ -4066,16 +4782,27 @@ int yaffs_GutsInitialise(yaffs_Device *dev) { dev->chunkGroupBits = bits - 16; } + dev->chunkGroupSize = 1 << dev->chunkGroupBits; + + if(dev->nChunksPerBlock < dev->chunkGroupSize) + { + // We have a problem because the soft delete won't work if + // the chunk group size > chunks per block. + // This can be remedied by using larger "virtual blocks". + + return YAFFS_FAIL; + } + + // More device initialisation - dev->garbageCollectionRequired = 0; dev->garbageCollections = 0; + dev->passiveGarbageCollections = 0; dev->currentDirtyChecker = 0; dev->bufferedBlock = -1; dev->doingBufferedBlockRewrite = 0; - dev->blockSelectedForGC = -1; dev->nDeletedFiles = 0; dev->nBackgroundDeletions=0; dev->nUnlinkedFiles = 0; @@ -4083,6 +4810,12 @@ int yaffs_GutsInitialise(yaffs_Device *dev) dev->eccUnfixed=0; dev->tagsEccFixed=0; dev->tagsEccUnfixed=0; + dev->nErasedBlocks=0; + + dev->localBuffer = YMALLOC(dev->nBytesPerChunk); + + + yaffs_InitialiseBlocks(dev,nBlocks); @@ -4090,17 +4823,25 @@ int yaffs_GutsInitialise(yaffs_Device *dev) yaffs_InitialiseObjects(dev); -#ifdef CONFIG_YAFFS_SHORT_OP_CACHE + if(dev->nShortOpCaches > 0) { int i; - for(i=0; i < YAFFS_N_CACHE_CHUNKS; i++) + + if(dev->nShortOpCaches > YAFFS_MAX_SHORT_OP_CACHES) + { + dev->nShortOpCaches = YAFFS_MAX_SHORT_OP_CACHES; + } + + dev->srCache = YMALLOC( dev->nShortOpCaches * sizeof(yaffs_ChunkCache)); + + for(i=0; i < dev->nShortOpCaches; i++) { - dev->srCache[i].objectId = 0; + dev->srCache[i].object = NULL; dev->srCache[i].lastUse = 0; + dev->srCache[i].dirty = 0; } dev->srLastUse = 0; } -#endif dev->cacheHits = 0; @@ -4133,15 +4874,25 @@ int yaffs_GutsInitialise(yaffs_Device *dev) void yaffs_Deinitialise(yaffs_Device *dev) { - yaffs_DeinitialiseBlocks(dev); - yaffs_DeinitialiseTnodes(dev); - yaffs_DeinitialiseObjects(dev); + if(dev->isMounted) + { + + yaffs_DeinitialiseBlocks(dev); + yaffs_DeinitialiseTnodes(dev); + yaffs_DeinitialiseObjects(dev); + if(dev->nShortOpCaches > 0) + YFREE(dev->srCache); + YFREE(dev->localBuffer); + dev->isMounted = 0; + } } +#if 0 + int yaffs_GetNumberOfFreeChunks(yaffs_Device *dev) { - int nFree = dev->nFreeChunks - (YAFFS_CHUNKS_PER_BLOCK * YAFFS_RESERVED_BLOCKS); + int nFree = dev->nFreeChunks - (dev->nChunksPerBlock * YAFFS_RESERVED_BLOCKS); struct list_head *i; yaffs_Object *l; @@ -4157,18 +4908,99 @@ int yaffs_GetNumberOfFreeChunks(yaffs_Device *dev) nFree += l->nDataChunks; } } + + + // printf("___________ nFreeChunks is %d nFree is %d\n",dev->nFreeChunks,nFree); + + if(nFree < 0) nFree = 0; + + return nFree; + +} + +#endif + +int yaffs_GetNumberOfFreeChunks(yaffs_Device *dev) +{ + int nFree; + int pending; + int b; + int nDirtyCacheChunks=0; + + yaffs_BlockInfo *blk; + + struct list_head *i; + yaffs_Object *l; + + for(nFree = 0, b = dev->internalStartBlock; b <= dev->internalEndBlock; b++) + { + blk = yaffs_GetBlockInfo(dev,b); + + switch(blk->blockState) + { + case YAFFS_BLOCK_STATE_EMPTY: + case YAFFS_BLOCK_STATE_ALLOCATING: + case YAFFS_BLOCK_STATE_FULL: nFree += (dev->nChunksPerBlock - blk->pagesInUse); break; + default: break; + } + } + + + pending = 0; + + // To the free chunks add the chunks that are in the deleted unlinked files. + list_for_each(i,&dev->unlinkedDir->variant.directoryVariant.children) + { + if(i) + { + l = list_entry(i, yaffs_Object,siblings); + if(l->deleted) + { + pending++; + pending += l->nDataChunks; + } + } + } + + + + //printf("___________ really free is %d, pending %d, nFree is %d\n",nFree,pending, nFree+pending); + + if(nFree != dev->nFreeChunks) + { + // printf("___________Different! really free is %d, nFreeChunks %d\n",nFree dev->nFreeChunks); + } + nFree += pending; + + // Now count the number of dirty chunks in the cache and subtract those + + { + int i; + for(i = 0; i < dev->nShortOpCaches; i++) + { + if(dev->srCache[i].dirty) nDirtyCacheChunks++; + } + } + + nFree -= nDirtyCacheChunks; + + nFree -= ((dev->nReservedBlocks + 1) * dev->nChunksPerBlock); + + if(nFree < 0) nFree = 0; - return (nFree < 0) ? 0 : nFree; + return nFree; } + /////////////////// YAFFS test code ////////////////////////////////// #define yaffs_CheckStruct(structure,syze, name) \ if(sizeof(structure) != syze) \ - { YPRINTF(("%s should be %d but is %d\n",name,syze,sizeof(structure))); \ + { \ + T(YAFFS_TRACE_ALWAYS,(TSTR("%s should be %d but is %d\n" TENDSTR),name,syze,sizeof(structure))); \ return YAFFS_FAIL; \ } @@ -4178,28 +5010,33 @@ static int yaffs_CheckStructures(void) yaffs_CheckStruct(yaffs_Tags,8,"yaffs_Tags") yaffs_CheckStruct(yaffs_TagsUnion,8,"yaffs_TagsUnion") yaffs_CheckStruct(yaffs_Spare,16,"yaffs_Spare") +#ifndef CONFIG_YAFFS_TNODE_LIST_DEBUG yaffs_CheckStruct(yaffs_Tnode,2* YAFFS_NTNODES_LEVEL0,"yaffs_Tnode") +#endif yaffs_CheckStruct(yaffs_ObjectHeader,512,"yaffs_ObjectHeader") return YAFFS_OK; } +#if 0 void yaffs_GutsTest(yaffs_Device *dev) { if(yaffs_CheckStructures() != YAFFS_OK) { - YPRINTF(("One or more structures malformed-- aborting\n")); + T(YAFFS_TRACE_ALWAYS,(TSTR("One or more structures malformed-- aborting\n" TENDSTR))); return; } - else - { - YPRINTF(("Structures OK\n")); - } yaffs_TnodeTest(dev); yaffs_ObjectTest(dev); } +#endif + + + + +