X-Git-Url: http://www.aleph1.co.uk/gitweb/?p=yaffs2.git;a=blobdiff_plain;f=yaffs_guts.c;h=44eaed692cedb05ac60af308d4d4a3e999fee577;hp=d72cd49d3150d23c58eaff423d835ff000e68cd6;hb=7211ad39b355b558a4f8a97bc4821ee859888bd6;hpb=102ee9ef7f61177ab100570809d9dbde888e3904 diff --git a/yaffs_guts.c b/yaffs_guts.c index d72cd49..44eaed6 100644 --- a/yaffs_guts.c +++ b/yaffs_guts.c @@ -1,7 +1,7 @@ /* - * YAFFS: Yet another FFS. A NAND-flash specific file system. + * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. * - * Copyright (C) 2002 Aleph One Ltd. + * Copyright (C) 2002-2007 Aleph One Ltd. * for Toby Churchill Ltd and Brightstar Engineering * * Created by Charles Manning @@ -9,47 +9,38 @@ * 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. - * */ const char *yaffs_guts_c_version = - "$Id: yaffs_guts.c,v 1.18 2005-08-16 02:28:04 charles Exp $"; + "$Id: yaffs_guts.c,v 1.78 2009-01-27 02:52:45 charles Exp $"; #include "yportenv.h" #include "yaffsinterface.h" #include "yaffs_guts.h" #include "yaffs_tagsvalidity.h" +#include "yaffs_getblockinfo.h" #include "yaffs_tagscompat.h" - -#ifdef CONFIG_YAFFS_WINCE -void yfsd_LockYAFFS(BOOL fsLockOnly); -void yfsd_UnlockYAFFS(BOOL fsLockOnly); +#ifndef CONFIG_YAFFS_USE_OWN_SORT +#include "yaffs_qsort.h" #endif +#include "yaffs_nand.h" + +#include "yaffs_checkptrw.h" + +#include "yaffs_nand.h" +#include "yaffs_packedtags2.h" + #define YAFFS_PASSIVE_GC_CHUNKS 2 #include "yaffs_ecc.h" -/* NAND access */ - -static Y_INLINE int yaffs_ReadChunkWithTagsFromNAND(yaffs_Device * dev, - int chunkInNAND, - __u8 * buffer, - yaffs_ExtendedTags * tags); -static Y_INLINE int yaffs_WriteChunkWithTagsToNAND(yaffs_Device * dev, - int chunkInNAND, - const __u8 * data, - yaffs_ExtendedTags * tags); -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); + /* Robustification (if it ever comes about...) */ static void yaffs_RetireBlock(yaffs_Device * dev, int blockInNAND); -static void yaffs_HandleWriteChunkError(yaffs_Device * dev, int chunkInNAND); +static void yaffs_HandleWriteChunkError(yaffs_Device * dev, int chunkInNAND, int erasedOk); static void yaffs_HandleWriteChunkOk(yaffs_Device * dev, int chunkInNAND, const __u8 * data, const yaffs_ExtendedTags * tags); @@ -57,6 +48,11 @@ static void yaffs_HandleUpdateChunk(yaffs_Device * dev, int chunkInNAND, const yaffs_ExtendedTags * tags); /* Other local prototypes */ +static int yaffs_UnlinkObject( yaffs_Object *obj); +static int yaffs_ObjectHasCachedWriteData(yaffs_Object *obj); + +static void yaffs_HardlinkFixup(yaffs_Device *dev, yaffs_Object *hardList); + static int yaffs_WriteNewChunkWithTagsToNAND(yaffs_Device * dev, const __u8 * buffer, yaffs_ExtendedTags * tags, @@ -78,9 +74,6 @@ static int yaffs_DoGenericObjectDeletion(yaffs_Object * in); static yaffs_BlockInfo *yaffs_GetBlockInfo(yaffs_Device * dev, int blockNo); -static __u8 *yaffs_GetTempBuffer(yaffs_Device * dev, int lineNo); -static void yaffs_ReleaseTempBuffer(yaffs_Device * dev, __u8 * buffer, - int lineNo); static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev, int chunkInNAND); @@ -93,10 +86,13 @@ static int yaffs_TagsMatch(const yaffs_ExtendedTags * tags, int objectId, loff_t yaffs_GetFileSize(yaffs_Object * obj); -static int yaffs_AllocateChunk(yaffs_Device * dev, int useReserve); +static int yaffs_AllocateChunk(yaffs_Device * dev, int useReserve, yaffs_BlockInfo **blockUsedPtr); static void yaffs_VerifyFreeChunks(yaffs_Device * dev); +static void yaffs_CheckObjectDetailsLoaded(yaffs_Object *in); + +static void yaffs_VerifyDirectory(yaffs_Object *directory); #ifdef YAFFS_PARANOID static int yaffs_CheckFileSanity(yaffs_Object * in); #else @@ -106,118 +102,122 @@ static int yaffs_CheckFileSanity(yaffs_Object * in); static void yaffs_InvalidateWholeChunkCache(yaffs_Object * in); static void yaffs_InvalidateChunkCache(yaffs_Object * object, int chunkId); +static void yaffs_InvalidateCheckpoint(yaffs_Device *dev); -/* - * Start of real code. - */ - -/* - * NAND access layer - */ - +static int yaffs_FindChunkInFile(yaffs_Object * in, int chunkInInode, + yaffs_ExtendedTags * tags); +static __u32 yaffs_GetChunkGroupBase(yaffs_Device *dev, yaffs_Tnode *tn, unsigned pos); +static yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device * dev, + yaffs_FileStructure * fStruct, + __u32 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 - return yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(dev, - chunkInNAND, - buffer, - tags); -} +/* Function to calculate chunk and offset */ -static Y_INLINE int yaffs_WriteChunkWithTagsToNAND(yaffs_Device * dev, - int chunkInNAND, - const __u8 * buffer, - yaffs_ExtendedTags * tags) +static void yaffs_AddrToChunk(yaffs_Device *dev, loff_t addr, int *chunkOut, __u32 *offsetOut) { - chunkInNAND -= dev->chunkOffset; - - if (tags) { - tags->sequenceNumber = dev->sequenceNumber; - tags->chunkUsed = 1; - if (!yaffs_ValidateTags(tags)) { - T(YAFFS_TRACE_ERROR, - (TSTR("Writing uninitialised tags" TENDSTR))); - YBUG(); - } - T(YAFFS_TRACE_WRITE, - (TSTR("Writing chunk %d tags %d %d" TENDSTR), chunkInNAND, - tags->objectId, tags->chunkId)); - } else { - T(YAFFS_TRACE_ERROR, (TSTR("Writing with no tags" TENDSTR))); - YBUG(); + int chunk; + __u32 offset; + + chunk = (__u32)(addr >> dev->chunkShift); + + if(dev->chunkDiv == 1) + { + /* easy power of 2 case */ + offset = (__u32)(addr & dev->chunkMask); } - - if (dev->writeChunkWithTagsToNAND) - return dev->writeChunkWithTagsToNAND(dev, chunkInNAND, buffer, - tags); - else - return yaffs_TagsCompatabilityWriteChunkWithTagsToNAND(dev, - chunkInNAND, - buffer, - tags); -} - -static Y_INLINE int yaffs_MarkBlockBad(yaffs_Device * dev, int blockNo) -{ - blockNo -= dev->blockOffset; - - if (dev->markNANDBlockBad) - return dev->markNANDBlockBad(dev, blockNo); else - return yaffs_TagsCompatabilityMarkNANDBlockBad(dev, blockNo); -} -static Y_INLINE int yaffs_QueryInitialBlockState(yaffs_Device * dev, - int blockNo, - yaffs_BlockState * state, - unsigned *sequenceNumber) -{ - blockNo -= dev->blockOffset; + { + /* Non power-of-2 case */ + + loff_t chunkBase; + + chunk /= dev->chunkDiv; + + chunkBase = ((loff_t)chunk) * dev->nDataBytesPerChunk; + offset = (__u32)(addr - chunkBase); + } - if (dev->queryNANDBlock) - return dev->queryNANDBlock(dev, blockNo, state, sequenceNumber); - else - return yaffs_TagsCompatabilityQueryNANDBlock(dev, blockNo, - state, - sequenceNumber); + *chunkOut = chunk; + *offsetOut = offset; } -static int yaffs_EraseBlockInNAND(struct yaffs_DeviceStruct *dev, - int blockInNAND) +/* Function to return the number of shifts for a power of 2 greater than or equal + * to the given number + * Note we don't try to cater for all possible numbers and this does not have to + * be hellishly efficient. + */ + +static __u32 ShiftsGE(__u32 x) { - int result; - - blockInNAND -= dev->blockOffset; - - dev->nBlockErasures++; - result = dev->eraseBlockInNAND(dev, blockInNAND); + int extraBits; + int nShifts; + + nShifts = extraBits = 0; + + while(x>1){ + if(x & 1) extraBits++; + x>>=1; + nShifts++; + } - /* If at first we don't succeed, try again *once*.*/ - if (!result) - result = dev->eraseBlockInNAND(dev, blockInNAND); - return result; + if(extraBits) + nShifts++; + + return nShifts; } -static int yaffs_InitialiseNAND(struct yaffs_DeviceStruct *dev) +/* Function to return the number of shifts to get a 1 in bit 0 + */ + +static __u32 Shifts(__u32 x) { - return dev->initialiseNAND(dev); + int nShifts; + + nShifts = 0; + + if(!x) return 0; + + while( !(x&1)){ + x>>=1; + nShifts++; + } + + return nShifts; } + + /* * Temporary buffer manipulations. */ -static __u8 *yaffs_GetTempBuffer(yaffs_Device * dev, int lineNo) +static int yaffs_InitialiseTempBuffers(yaffs_Device *dev) +{ + int i; + __u8 *buf = (__u8 *)1; + + memset(dev->tempBuffer,0,sizeof(dev->tempBuffer)); + + for (i = 0; buf && i < YAFFS_N_TEMP_BUFFERS; i++) { + dev->tempBuffer[i].line = 0; /* not in use */ + dev->tempBuffer[i].buffer = buf = + YMALLOC_DMA(dev->totalBytesPerChunk); + } + + return buf ? YAFFS_OK : YAFFS_FAIL; + +} + +__u8 *yaffs_GetTempBuffer(yaffs_Device * dev, int lineNo) { int i, j; + + dev->tempInUse++; + if(dev->tempInUse > dev->maxTemp) + dev->maxTemp = dev->tempInUse; + for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) { if (dev->tempBuffer[i].line == 0) { dev->tempBuffer[i].line = lineNo; @@ -246,14 +246,17 @@ static __u8 *yaffs_GetTempBuffer(yaffs_Device * dev, int lineNo) */ dev->unmanagedTempAllocations++; - return YMALLOC(dev->nBytesPerChunk); + return YMALLOC(dev->nDataBytesPerChunk); } -static void yaffs_ReleaseTempBuffer(yaffs_Device * dev, __u8 * buffer, +void yaffs_ReleaseTempBuffer(yaffs_Device * dev, __u8 * buffer, int lineNo) { int i; + + dev->tempInUse--; + for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) { if (dev->tempBuffer[i].buffer == buffer) { dev->tempBuffer[i].line = 0; @@ -272,6 +275,34 @@ static void yaffs_ReleaseTempBuffer(yaffs_Device * dev, __u8 * buffer, } +/* + * Determine if we have a managed buffer. + */ +int yaffs_IsManagedTempBuffer(yaffs_Device * dev, const __u8 * buffer) +{ + int i; + for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) { + if (dev->tempBuffer[i].buffer == buffer) + return 1; + + } + + for (i = 0; i < dev->nShortOpCaches; i++) { + if( dev->srCache[i].data == buffer ) + return 1; + + } + + if (buffer == dev->checkpointBuffer) + return 1; + + T(YAFFS_TRACE_ALWAYS, + (TSTR("yaffs: unmaged buffer detected.\n" TENDSTR))); + return 0; +} + + + /* * Chunk bitmap manipulations */ @@ -288,6 +319,16 @@ static Y_INLINE __u8 *yaffs_BlockBits(yaffs_Device * dev, int blk) (dev->chunkBitmapStride * (blk - dev->internalStartBlock)); } +static Y_INLINE void yaffs_VerifyChunkBitId(yaffs_Device *dev, int blk, int chunk) +{ + if(blk < dev->internalStartBlock || blk > dev->internalEndBlock || + chunk < 0 || chunk >= dev->nChunksPerBlock) { + T(YAFFS_TRACE_ERROR, + (TSTR("**>> yaffs: Chunk Id (%d:%d) invalid"TENDSTR),blk,chunk)); + YBUG(); + } +} + static Y_INLINE void yaffs_ClearChunkBits(yaffs_Device * dev, int blk) { __u8 *blkBits = yaffs_BlockBits(dev, blk); @@ -299,12 +340,16 @@ static Y_INLINE void yaffs_ClearChunkBit(yaffs_Device * dev, int blk, int chunk) { __u8 *blkBits = yaffs_BlockBits(dev, blk); + yaffs_VerifyChunkBitId(dev,blk,chunk); + blkBits[chunk / 8] &= ~(1 << (chunk & 7)); } static Y_INLINE void yaffs_SetChunkBit(yaffs_Device * dev, int blk, int chunk) { __u8 *blkBits = yaffs_BlockBits(dev, blk); + + yaffs_VerifyChunkBitId(dev,blk,chunk); blkBits[chunk / 8] |= (1 << (chunk & 7)); } @@ -312,6 +357,8 @@ static Y_INLINE void yaffs_SetChunkBit(yaffs_Device * dev, int blk, int chunk) static Y_INLINE int yaffs_CheckChunkBit(yaffs_Device * dev, int blk, int chunk) { __u8 *blkBits = yaffs_BlockBits(dev, blk); + yaffs_VerifyChunkBitId(dev,blk,chunk); + return (blkBits[chunk / 8] & (1 << (chunk & 7))) ? 1 : 0; } @@ -327,1104 +374,1859 @@ static Y_INLINE int yaffs_StillSomeChunkBits(yaffs_Device * dev, int blk) return 0; } -/* - * Simple hash function. Needs to have a reasonable spread - */ - -static Y_INLINE int yaffs_HashFunction(int n) +static int yaffs_CountChunkBits(yaffs_Device * dev, int blk) { - return (n % YAFFS_NOBJECT_BUCKETS); + __u8 *blkBits = yaffs_BlockBits(dev, blk); + int i; + int n = 0; + for (i = 0; i < dev->chunkBitmapStride; i++) { + __u8 x = *blkBits; + while(x){ + if(x & 1) + n++; + x >>=1; + } + + blkBits++; + } + return n; } -/* - * Access functions to useful fake objects +/* + * Verification code */ -yaffs_Object *yaffs_Root(yaffs_Device * dev) +static int yaffs_SkipVerification(yaffs_Device *dev) { - return dev->rootDir; + return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY | YAFFS_TRACE_VERIFY_FULL)); } -yaffs_Object *yaffs_LostNFound(yaffs_Device * dev) +static int yaffs_SkipFullVerification(yaffs_Device *dev) { - return dev->lostNFoundDir; + return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY_FULL)); } +static int yaffs_SkipNANDVerification(yaffs_Device *dev) +{ + return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY_NAND)); +} -/* - * Erased NAND checking functions - */ - -int yaffs_CheckFF(__u8 * buffer, int nBytes) +static const char * blockStateName[] = { +"Unknown", +"Needs scanning", +"Scanning", +"Empty", +"Allocating", +"Full", +"Dirty", +"Checkpoint", +"Collecting", +"Dead" +}; + +static void yaffs_VerifyBlock(yaffs_Device *dev,yaffs_BlockInfo *bi,int n) { - /* Horrible, slow implementation */ - while (nBytes--) { - if (*buffer != 0xFF) - return 0; - buffer++; + int actuallyUsed; + int inUse; + + if(yaffs_SkipVerification(dev)) + return; + + /* Report illegal runtime states */ + if(bi->blockState >= YAFFS_NUMBER_OF_BLOCK_STATES) + T(YAFFS_TRACE_VERIFY,(TSTR("Block %d has undefined state %d"TENDSTR),n,bi->blockState)); + + switch(bi->blockState){ + case YAFFS_BLOCK_STATE_UNKNOWN: + case YAFFS_BLOCK_STATE_SCANNING: + case YAFFS_BLOCK_STATE_NEEDS_SCANNING: + T(YAFFS_TRACE_VERIFY,(TSTR("Block %d has bad run-state %s"TENDSTR), + n,blockStateName[bi->blockState])); } - return 1; + + /* Check pages in use and soft deletions are legal */ + + actuallyUsed = bi->pagesInUse - bi->softDeletions; + + if(bi->pagesInUse < 0 || bi->pagesInUse > dev->nChunksPerBlock || + bi->softDeletions < 0 || bi->softDeletions > dev->nChunksPerBlock || + actuallyUsed < 0 || actuallyUsed > dev->nChunksPerBlock) + T(YAFFS_TRACE_VERIFY,(TSTR("Block %d has illegal values pagesInUsed %d softDeletions %d"TENDSTR), + n,bi->pagesInUse,bi->softDeletions)); + + + /* Check chunk bitmap legal */ + inUse = yaffs_CountChunkBits(dev,n); + if(inUse != bi->pagesInUse) + T(YAFFS_TRACE_VERIFY,(TSTR("Block %d has inconsistent values pagesInUse %d counted chunk bits %d"TENDSTR), + n,bi->pagesInUse,inUse)); + + /* Check that the sequence number is valid. + * Ten million is legal, but is very unlikely + */ + if(dev->isYaffs2 && + (bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING || bi->blockState == YAFFS_BLOCK_STATE_FULL) && + (bi->sequenceNumber < YAFFS_LOWEST_SEQUENCE_NUMBER || bi->sequenceNumber > 10000000 )) + T(YAFFS_TRACE_VERIFY,(TSTR("Block %d has suspect sequence number of %d"TENDSTR), + n,bi->sequenceNumber)); + } -static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev, - int chunkInNAND) +static void yaffs_VerifyCollectedBlock(yaffs_Device *dev,yaffs_BlockInfo *bi,int n) { - - int retval = YAFFS_OK; - __u8 *data = yaffs_GetTempBuffer(dev, __LINE__); - yaffs_ExtendedTags tags; - - yaffs_ReadChunkWithTagsFromNAND(dev, chunkInNAND, data, &tags); - - if (!yaffs_CheckFF(data, dev->nBytesPerChunk) || tags.chunkUsed) { - T(YAFFS_TRACE_NANDACCESS, - (TSTR("Chunk %d not erased" TENDSTR), chunkInNAND)); - retval = YAFFS_FAIL; + yaffs_VerifyBlock(dev,bi,n); + + /* After collection the block should be in the erased state */ + /* This will need to change if we do partial gc */ + + if(bi->blockState != YAFFS_BLOCK_STATE_COLLECTING && + bi->blockState != YAFFS_BLOCK_STATE_EMPTY){ + T(YAFFS_TRACE_ERROR,(TSTR("Block %d is in state %d after gc, should be erased"TENDSTR), + n,bi->blockState)); } - - yaffs_ReleaseTempBuffer(dev, data, __LINE__); - - return retval; - } -static int yaffs_WriteNewChunkWithTagsToNAND(struct yaffs_DeviceStruct *dev, - const __u8 * data, - yaffs_ExtendedTags * tags, - int useReserve) +static void yaffs_VerifyBlocks(yaffs_Device *dev) { - int chunk; - - int writeOk = 1; - int attempts = 0; - - do { - chunk = yaffs_AllocateChunk(dev, useReserve); - - if (chunk >= 0) { - - /* First check this chunk is erased... */ -#ifndef CONFIG_YAFFS_DISABLE_CHUNK_ERASED_CHECK - writeOk = yaffs_CheckChunkErased(dev, chunk); -#endif - if (!writeOk) { - T(YAFFS_TRACE_ERROR, - (TSTR - ("**>> yaffs chunk %d was not erased" - TENDSTR), chunk)); - } else { - writeOk = - yaffs_WriteChunkWithTagsToNAND(dev, chunk, - data, tags); - } - attempts++; + int i; + int nBlocksPerState[YAFFS_NUMBER_OF_BLOCK_STATES]; + int nIllegalBlockStates = 0; + - if (writeOk) { - /* - * Copy the data into the robustification buffer. - * NB We do this at the end to prevent duplicates in the case of a write error. - * Todo - */ - yaffs_HandleWriteChunkOk(dev, chunk, data, - tags); - } else { - yaffs_HandleWriteChunkError(dev, chunk); - } - } + if(yaffs_SkipVerification(dev)) + return; - } while (chunk >= 0 && !writeOk); + memset(nBlocksPerState,0,sizeof(nBlocksPerState)); - if (attempts > 1) { - T(YAFFS_TRACE_ERROR, - (TSTR("**>> yaffs write required %d attempts" TENDSTR), - attempts)); - dev->nRetriedWrites += (attempts - 1); + + for(i = dev->internalStartBlock; i <= dev->internalEndBlock; i++){ + yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev,i); + yaffs_VerifyBlock(dev,bi,i); + + if(bi->blockState < YAFFS_NUMBER_OF_BLOCK_STATES) + nBlocksPerState[bi->blockState]++; + else + nIllegalBlockStates++; + } + + T(YAFFS_TRACE_VERIFY,(TSTR(""TENDSTR))); + T(YAFFS_TRACE_VERIFY,(TSTR("Block summary"TENDSTR))); + + T(YAFFS_TRACE_VERIFY,(TSTR("%d blocks have illegal states"TENDSTR),nIllegalBlockStates)); + if(nBlocksPerState[YAFFS_BLOCK_STATE_ALLOCATING] > 1) + T(YAFFS_TRACE_VERIFY,(TSTR("Too many allocating blocks"TENDSTR))); + + for(i = 0; i < YAFFS_NUMBER_OF_BLOCK_STATES; i++) + T(YAFFS_TRACE_VERIFY, + (TSTR("%s %d blocks"TENDSTR), + blockStateName[i],nBlocksPerState[i])); + + if(dev->blocksInCheckpoint != nBlocksPerState[YAFFS_BLOCK_STATE_CHECKPOINT]) + T(YAFFS_TRACE_VERIFY, + (TSTR("Checkpoint block count wrong dev %d count %d"TENDSTR), + dev->blocksInCheckpoint, nBlocksPerState[YAFFS_BLOCK_STATE_CHECKPOINT])); + + if(dev->nErasedBlocks != nBlocksPerState[YAFFS_BLOCK_STATE_EMPTY]) + T(YAFFS_TRACE_VERIFY, + (TSTR("Erased block count wrong dev %d count %d"TENDSTR), + dev->nErasedBlocks, nBlocksPerState[YAFFS_BLOCK_STATE_EMPTY])); + + if(nBlocksPerState[YAFFS_BLOCK_STATE_COLLECTING] > 1) + T(YAFFS_TRACE_VERIFY, + (TSTR("Too many collecting blocks %d (max is 1)"TENDSTR), + nBlocksPerState[YAFFS_BLOCK_STATE_COLLECTING])); + + T(YAFFS_TRACE_VERIFY,(TSTR(""TENDSTR))); - return chunk; } /* - * Block retiring for handling a broken block. + * Verify the object header. oh must be valid, but obj and tags may be NULL in which + * case those tests will not be performed. */ - -static void yaffs_RetireBlock(yaffs_Device * dev, int blockInNAND) +static void yaffs_VerifyObjectHeader(yaffs_Object *obj, yaffs_ObjectHeader *oh, yaffs_ExtendedTags *tags, int parentCheck) { + if(obj && yaffs_SkipVerification(obj->myDev)) + return; + + if(!(tags && obj && oh)){ + T(YAFFS_TRACE_VERIFY, + (TSTR("Verifying object header tags %x obj %x oh %x"TENDSTR), + (__u32)tags,(__u32)obj,(__u32)oh)); + return; + } + + if(oh->type <= YAFFS_OBJECT_TYPE_UNKNOWN || + oh->type > YAFFS_OBJECT_TYPE_MAX) + T(YAFFS_TRACE_VERIFY, + (TSTR("Obj %d header type is illegal value 0x%x"TENDSTR), + tags->objectId, oh->type)); - yaffs_MarkBlockBad(dev, blockInNAND); + if(tags->objectId != obj->objectId) + T(YAFFS_TRACE_VERIFY, + (TSTR("Obj %d header mismatch objectId %d"TENDSTR), + tags->objectId, obj->objectId)); - yaffs_GetBlockInfo(dev, blockInNAND)->blockState = - YAFFS_BLOCK_STATE_DEAD; - dev->nRetiredBlocks++; -} + /* + * Check that the object's parent ids match if parentCheck requested. + * + * Tests do not apply to the root object. + */ + + if(parentCheck && tags->objectId > 1 && !obj->parent) + T(YAFFS_TRACE_VERIFY, + (TSTR("Obj %d header mismatch parentId %d obj->parent is NULL"TENDSTR), + tags->objectId, oh->parentObjectId)); + + + if(parentCheck && obj->parent && + oh->parentObjectId != obj->parent->objectId && + (oh->parentObjectId != YAFFS_OBJECTID_UNLINKED || + obj->parent->objectId != YAFFS_OBJECTID_DELETED)) + T(YAFFS_TRACE_VERIFY, + (TSTR("Obj %d header mismatch parentId %d parentObjectId %d"TENDSTR), + tags->objectId, oh->parentObjectId, obj->parent->objectId)); + + + if(tags->objectId > 1 && oh->name[0] == 0) /* Null name */ + T(YAFFS_TRACE_VERIFY, + (TSTR("Obj %d header name is NULL"TENDSTR), + obj->objectId)); -/* - * Functions for robustisizing TODO - * - */ - -static void yaffs_HandleWriteChunkOk(yaffs_Device * dev, int chunkInNAND, - const __u8 * data, - const yaffs_ExtendedTags * tags) -{ + if(tags->objectId > 1 && ((__u8)(oh->name[0])) == 0xff) /* Trashed name */ + T(YAFFS_TRACE_VERIFY, + (TSTR("Obj %d header name is 0xFF"TENDSTR), + obj->objectId)); } -static void yaffs_HandleUpdateChunk(yaffs_Device * dev, int chunkInNAND, - const yaffs_ExtendedTags * tags) -{ -} -static void yaffs_HandleWriteChunkError(yaffs_Device * dev, int chunkInNAND) + +static int yaffs_VerifyTnodeWorker(yaffs_Object * obj, yaffs_Tnode * tn, + __u32 level, int chunkOffset) { - int blockInNAND = chunkInNAND / dev->nChunksPerBlock; + int i; + yaffs_Device *dev = obj->myDev; + int ok = 1; - /* Mark the block for retirement */ - yaffs_GetBlockInfo(dev, blockInNAND)->needsRetiring = 1; - /* Delete the chunk */ - yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__); -} + if (tn) { + if (level > 0) { + for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++){ + if (tn->internal[i]) { + ok = yaffs_VerifyTnodeWorker(obj, + tn->internal[i], + level - 1, + (chunkOffset<objectId; + + chunkOffset <<= YAFFS_TNODES_LEVEL0_BITS; + + for(i = 0; i < YAFFS_NTNODES_LEVEL0; i++){ + __u32 theChunk = yaffs_GetChunkGroupBase(dev,tn,i); + + if(theChunk > 0){ + /* T(~0,(TSTR("verifying (%d:%d) %d"TENDSTR),tags.objectId,tags.chunkId,theChunk)); */ + yaffs_ReadChunkWithTagsFromNAND(dev,theChunk,NULL, &tags); + if(tags.objectId != objectId || tags.chunkId != chunkOffset){ + T(~0,(TSTR("Object %d chunkId %d NAND mismatch chunk %d tags (%d:%d)"TENDSTR), + objectId, chunkOffset, theChunk, + tags.objectId, tags.chunkId)); + } + } + chunkOffset++; + } + } + } -/*---------------- Name handling functions ------------*/ + return ok; -static __u16 yaffs_CalcNameSum(const YCHAR * name) -{ - __u16 sum = 0; - __u16 i = 1; +} - YUCHAR *bname = (YUCHAR *) name; - if (bname) { - while ((*bname) && (i <= YAFFS_MAX_NAME_LENGTH)) { -#ifdef CONFIG_YAFFS_CASE_INSENSITIVE - sum += yaffs_toupper(*bname) * i; -#else - sum += (*bname) * i; -#endif - i++; - bname++; - } +static void yaffs_VerifyFile(yaffs_Object *obj) +{ + int requiredTallness; + int actualTallness; + __u32 lastChunk; + __u32 x; + __u32 i; + yaffs_Device *dev; + yaffs_ExtendedTags tags; + yaffs_Tnode *tn; + __u32 objectId; + + if(!obj) + return; + + if(yaffs_SkipVerification(obj->myDev)) + return; + + dev = obj->myDev; + objectId = obj->objectId; + + /* Check file size is consistent with tnode depth */ + lastChunk = obj->variant.fileVariant.fileSize / dev->nDataBytesPerChunk + 1; + x = lastChunk >> YAFFS_TNODES_LEVEL0_BITS; + requiredTallness = 0; + while (x> 0) { + x >>= YAFFS_TNODES_INTERNAL_BITS; + requiredTallness++; } - return sum; -} + + actualTallness = obj->variant.fileVariant.topLevel; + + if(requiredTallness > actualTallness ) + T(YAFFS_TRACE_VERIFY, + (TSTR("Obj %d had tnode tallness %d, needs to be %d"TENDSTR), + obj->objectId,actualTallness, requiredTallness)); + + + /* Check that the chunks in the tnode tree are all correct. + * We do this by scanning through the tnode tree and + * checking the tags for every chunk match. + */ + + if(yaffs_SkipNANDVerification(dev)) + return; + + for(i = 1; i <= lastChunk; i++){ + tn = yaffs_FindLevel0Tnode(dev, &obj->variant.fileVariant,i); + + if (tn) { + __u32 theChunk = yaffs_GetChunkGroupBase(dev,tn,i); + if(theChunk > 0){ + /* T(~0,(TSTR("verifying (%d:%d) %d"TENDSTR),objectId,i,theChunk)); */ + yaffs_ReadChunkWithTagsFromNAND(dev,theChunk,NULL, &tags); + if(tags.objectId != objectId || tags.chunkId != i){ + T(~0,(TSTR("Object %d chunkId %d NAND mismatch chunk %d tags (%d:%d)"TENDSTR), + objectId, i, theChunk, + tags.objectId, tags.chunkId)); + } + } + } -static void yaffs_SetObjectName(yaffs_Object * obj, const YCHAR * name) -{ -#ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM - if (name && yaffs_strlen(name) <= YAFFS_SHORT_NAME_LENGTH) { - yaffs_strcpy(obj->shortName, name); - } else { - obj->shortName[0] = _Y('\0'); } -#endif - obj->sum = yaffs_CalcNameSum(name); + } -/*-------------------- TNODES ------------------- - * List of spare tnodes - * The list is hooked together using the first pointer - * in the tnode. - */ - -/* yaffs_CreateTnodes creates a bunch more tnodes and - * adds them to the tnode free list. - * Don't use this function directly - */ +static void yaffs_VerifyHardLink(yaffs_Object *obj) +{ + if(obj && yaffs_SkipVerification(obj->myDev)) + return; + + /* Verify sane equivalent object */ +} -static int yaffs_CreateTnodes(yaffs_Device * dev, int nTnodes) +static void yaffs_VerifySymlink(yaffs_Object *obj) { - int i; - yaffs_Tnode *newTnodes; - yaffs_TnodeList *tnl; + if(obj && yaffs_SkipVerification(obj->myDev)) + return; + + /* Verify symlink string */ +} - if (nTnodes < 1) - return YAFFS_OK; +static void yaffs_VerifySpecial(yaffs_Object *obj) +{ + if(obj && yaffs_SkipVerification(obj->myDev)) + return; +} - /* make these things */ +static void yaffs_VerifyObject(yaffs_Object *obj) +{ + yaffs_Device *dev; + + __u32 chunkMin; + __u32 chunkMax; + + __u32 chunkIdOk; + __u32 chunkInRange; + __u32 chunkShouldNotBeDeleted; + __u32 chunkValid; + + if(!obj) + return; + + if(obj->beingCreated) + return; + + dev = obj->myDev; + + if(yaffs_SkipVerification(dev)) + return; + + /* Check sane object header chunk */ + + chunkMin = dev->internalStartBlock * dev->nChunksPerBlock; + chunkMax = (dev->internalEndBlock+1) * dev->nChunksPerBlock - 1; + + chunkInRange = (((unsigned)(obj->hdrChunk)) >= chunkMin && ((unsigned)(obj->hdrChunk)) <= chunkMax); + chunkIdOk = chunkInRange || obj->hdrChunk == 0; + chunkValid = chunkInRange && + yaffs_CheckChunkBit(dev, + obj->hdrChunk / dev->nChunksPerBlock, + obj->hdrChunk % dev->nChunksPerBlock); + chunkShouldNotBeDeleted = chunkInRange && !chunkValid; + + if(!obj->fake && + (!chunkIdOk || chunkShouldNotBeDeleted)) { + T(YAFFS_TRACE_VERIFY, + (TSTR("Obj %d has chunkId %d %s %s"TENDSTR), + obj->objectId,obj->hdrChunk, + chunkIdOk ? "" : ",out of range", + chunkShouldNotBeDeleted ? ",marked as deleted" : "")); + } + + if(chunkValid &&!yaffs_SkipNANDVerification(dev)) { + yaffs_ExtendedTags tags; + yaffs_ObjectHeader *oh; + __u8 *buffer = yaffs_GetTempBuffer(dev,__LINE__); + + oh = (yaffs_ObjectHeader *)buffer; - newTnodes = YMALLOC(nTnodes * sizeof(yaffs_Tnode)); + yaffs_ReadChunkWithTagsFromNAND(dev, obj->hdrChunk,buffer, &tags); - if (!newTnodes) { - T(YAFFS_TRACE_ERROR, - (TSTR("yaffs: Could not allocate Tnodes" TENDSTR))); - return YAFFS_FAIL; + yaffs_VerifyObjectHeader(obj,oh,&tags,1); + + yaffs_ReleaseTempBuffer(dev,buffer,__LINE__); } - - /* Hook them into the free list */ - 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] = (void *)1; -#endif + + /* Verify it has a parent */ + if(obj && !obj->fake && + (!obj->parent || obj->parent->myDev != dev)){ + T(YAFFS_TRACE_VERIFY, + (TSTR("Obj %d has parent pointer %p which does not look like an object"TENDSTR), + obj->objectId,obj->parent)); } - - newTnodes[nTnodes - 1].internal[0] = dev->freeTnodes; -#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG - newTnodes[nTnodes - 1].internal[YAFFS_NTNODES_INTERNAL] = (void *)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) { - T(YAFFS_TRACE_ERROR, - (TSTR - ("yaffs: Could not add tnodes to management list" TENDSTR))); - - } else { - tnl->tnodes = newTnodes; - tnl->next = dev->allocatedTnodeList; - dev->allocatedTnodeList = tnl; + + /* Verify parent is a directory */ + if(obj->parent && obj->parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY){ + T(YAFFS_TRACE_VERIFY, + (TSTR("Obj %d's parent is not a directory (type %d)"TENDSTR), + obj->objectId,obj->parent->variantType)); + } + + switch(obj->variantType){ + case YAFFS_OBJECT_TYPE_FILE: + yaffs_VerifyFile(obj); + break; + case YAFFS_OBJECT_TYPE_SYMLINK: + yaffs_VerifySymlink(obj); + break; + case YAFFS_OBJECT_TYPE_DIRECTORY: + yaffs_VerifyDirectory(obj); + break; + case YAFFS_OBJECT_TYPE_HARDLINK: + yaffs_VerifyHardLink(obj); + break; + case YAFFS_OBJECT_TYPE_SPECIAL: + yaffs_VerifySpecial(obj); + break; + case YAFFS_OBJECT_TYPE_UNKNOWN: + default: + T(YAFFS_TRACE_VERIFY, + (TSTR("Obj %d has illegaltype %d"TENDSTR), + obj->objectId,obj->variantType)); + break; } + + +} - T(YAFFS_TRACE_ALLOCATE, (TSTR("yaffs: Tnodes added" TENDSTR))); +static void yaffs_VerifyObjects(yaffs_Device *dev) +{ + yaffs_Object *obj; + int i; + struct ylist_head *lh; + + if(yaffs_SkipVerification(dev)) + return; + + /* Iterate through the objects in each hash entry */ + + for(i = 0; i < YAFFS_NOBJECT_BUCKETS; i++){ + ylist_for_each(lh, &dev->objectBucket[i].list) { + if (lh) { + obj = ylist_entry(lh, yaffs_Object, hashLink); + yaffs_VerifyObject(obj); + } + } + } - return YAFFS_OK; } -/* GetTnode gets us a clean tnode. Tries to make allocate more if we run out */ -static yaffs_Tnode *yaffs_GetTnode(yaffs_Device * dev) +/* + * Simple hash function. Needs to have a reasonable spread + */ + +static Y_INLINE int yaffs_HashFunction(int n) { - yaffs_Tnode *tn = NULL; - - /* If there are none left make more */ - if (!dev->freeTnodes) { - yaffs_CreateTnodes(dev, YAFFS_ALLOCATION_NTNODES); - } + n = abs(n); + return (n % YAFFS_NOBJECT_BUCKETS); +} - if (dev->freeTnodes) { - tn = dev->freeTnodes; -#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG - if (tn->internal[YAFFS_NTNODES_INTERNAL] != (void *)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 */ - memset(tn, 0, sizeof(yaffs_Tnode)); - } +/* + * Access functions to useful fake objects. + * Note that root might have a presence in NAND if permissions are set. + */ + +yaffs_Object *yaffs_Root(yaffs_Device * dev) +{ + return dev->rootDir; +} - return tn; +yaffs_Object *yaffs_LostNFound(yaffs_Device * dev) +{ + return dev->lostNFoundDir; } -/* FreeTnode frees up a tnode and puts it back on the free list */ -static void yaffs_FreeTnode(yaffs_Device * dev, yaffs_Tnode * tn) + +/* + * Erased NAND checking functions + */ + +int yaffs_CheckFF(__u8 * buffer, int nBytes) { - 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] = (void *)1; -#endif - tn->internal[0] = dev->freeTnodes; - dev->freeTnodes = tn; - dev->nFreeTnodes++; + /* Horrible, slow implementation */ + while (nBytes--) { + if (*buffer != 0xFF) + return 0; + buffer++; } + return 1; } -static void yaffs_DeinitialiseTnodes(yaffs_Device * dev) +static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev, + int chunkInNAND) { - /* Free the list of allocated tnodes */ - yaffs_TnodeList *tmp; - while (dev->allocatedTnodeList) { - tmp = dev->allocatedTnodeList->next; + int retval = YAFFS_OK; + __u8 *data = yaffs_GetTempBuffer(dev, __LINE__); + yaffs_ExtendedTags tags; + int result; - YFREE(dev->allocatedTnodeList->tnodes); - YFREE(dev->allocatedTnodeList); - dev->allocatedTnodeList = tmp; + result = yaffs_ReadChunkWithTagsFromNAND(dev, chunkInNAND, data, &tags); + + if(tags.eccResult > YAFFS_ECC_RESULT_NO_ERROR) + retval = YAFFS_FAIL; + + if (!yaffs_CheckFF(data, dev->nDataBytesPerChunk) || tags.chunkUsed) { + T(YAFFS_TRACE_NANDACCESS, + (TSTR("Chunk %d not erased" TENDSTR), chunkInNAND)); + retval = YAFFS_FAIL; } - dev->freeTnodes = NULL; - dev->nFreeTnodes = 0; -} + yaffs_ReleaseTempBuffer(dev, data, __LINE__); -static void yaffs_InitialiseTnodes(yaffs_Device * dev) -{ - dev->allocatedTnodeList = NULL; - dev->freeTnodes = NULL; - dev->nFreeTnodes = 0; - dev->nTnodesCreated = 0; + return retval; } -/* ------------------- End of individual tnode manipulation -----------------*/ +static int yaffs_WriteNewChunkWithTagsToNAND(struct yaffs_DeviceStruct *dev, + const __u8 * data, + yaffs_ExtendedTags * tags, + int useReserve) +{ + int attempts = 0; + int writeOk = 0; + int chunk; -/* ---------Functions to manipulate the look-up tree (made up of tnodes) ------ - * The look up tree is represented by the top tnode and the number of topLevel - * in the tree. 0 means only the level 0 tnode is in the tree. - */ + yaffs_InvalidateCheckpoint(dev); -/* FindLevel0Tnode finds the level 0 tnode, if one exists. */ -static yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device * dev, - yaffs_FileStructure * fStruct, - __u32 chunkId) -{ + do { + yaffs_BlockInfo *bi = 0; + int erasedOk = 0; - yaffs_Tnode *tn = fStruct->top; - __u32 i; - int requiredTallness; - int level = fStruct->topLevel; + chunk = yaffs_AllocateChunk(dev, useReserve, &bi); + if (chunk < 0) { + /* no space */ + break; + } - /* Check sane level and chunk Id */ - if (level < 0 || level > YAFFS_TNODES_MAX_LEVEL) { - return NULL; - } + /* First check this chunk is erased, if it needs + * checking. The checking policy (unless forced + * always on) is as follows: + * + * Check the first page we try to write in a block. + * If the check passes then we don't need to check any + * more. If the check fails, we check again... + * If the block has been erased, we don't need to check. + * + * However, if the block has been prioritised for gc, + * then we think there might be something odd about + * this block and stop using it. + * + * Rationale: We should only ever see chunks that have + * not been erased if there was a partially written + * chunk due to power loss. This checking policy should + * catch that case with very few checks and thus save a + * lot of checks that are most likely not needed. + */ + if (bi->gcPrioritise) { + yaffs_DeleteChunk(dev, chunk, 1, __LINE__); + /* try another chunk */ + continue; + } - if (chunkId > YAFFS_MAX_CHUNK_ID) { - return NULL; - } + /* let's give it a try */ + attempts++; - /* First check we're tall enough (ie enough topLevel) */ +#ifdef CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED + bi->skipErasedCheck = 0; +#endif + if (!bi->skipErasedCheck) { + erasedOk = yaffs_CheckChunkErased(dev, chunk); + if (erasedOk != YAFFS_OK) { + T(YAFFS_TRACE_ERROR, + (TSTR ("**>> yaffs chunk %d was not erased" + TENDSTR), chunk)); - i = chunkId >> YAFFS_TNODES_LEVEL0_BITS; - requiredTallness = 0; - while (i) { - i >>= YAFFS_TNODES_INTERNAL_BITS; - requiredTallness++; - } + /* try another chunk */ + continue; + } + bi->skipErasedCheck = 1; + } - if (requiredTallness > fStruct->topLevel) { - /* Not tall enough, so we can't find it, return NULL. */ - return NULL; - } + writeOk = yaffs_WriteChunkWithTagsToNAND(dev, chunk, + data, tags); + if (writeOk != YAFFS_OK) { + yaffs_HandleWriteChunkError(dev, chunk, erasedOk); + /* try another chunk */ + continue; + } - /* Traverse down to level 0 */ - while (level > 0 && tn) { - tn = tn-> - internal[(chunkId >> - ( YAFFS_TNODES_LEVEL0_BITS + - (level - 1) * - YAFFS_TNODES_INTERNAL_BITS) - ) & - YAFFS_TNODES_INTERNAL_MASK]; - level--; + /* Copy the data into the robustification buffer */ + yaffs_HandleWriteChunkOk(dev, chunk, data, tags); + + } while (writeOk != YAFFS_OK && + (yaffs_wr_attempts <= 0 || attempts <= yaffs_wr_attempts)); + + if(!writeOk) + chunk = -1; + + if (attempts > 1) { + T(YAFFS_TRACE_ERROR, + (TSTR("**>> yaffs write required %d attempts" TENDSTR), + attempts)); + dev->nRetriedWrites += (attempts - 1); } - return tn; + return chunk; } -/* AddOrFindLevel0Tnode finds the level 0 tnode if it exists, otherwise first expands the tree. - * This happens in two steps: - * 1. If the tree isn't tall enough, then make it taller. - * 2. Scan down the tree towards the level 0 tnode adding tnodes if required. - * - * Used when modifying the tree. +/* + * Block retiring for handling a broken block. */ -static yaffs_Tnode *yaffs_AddOrFindLevel0Tnode(yaffs_Device * dev, - yaffs_FileStructure * fStruct, - __u32 chunkId) +static void yaffs_RetireBlock(yaffs_Device * dev, int blockInNAND) { + yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND); - yaffs_Tnode *tn; - - int requiredTallness; - int i; - int l; - - __u32 x; - - - /* Check sane level and page Id */ - if (fStruct->topLevel < 0 || fStruct->topLevel > YAFFS_TNODES_MAX_LEVEL) { - return NULL; + yaffs_InvalidateCheckpoint(dev); + + if (yaffs_MarkBlockBad(dev, blockInNAND) != YAFFS_OK) { + if (yaffs_EraseBlockInNAND(dev, blockInNAND) != YAFFS_OK) { + T(YAFFS_TRACE_ALWAYS, (TSTR( + "yaffs: Failed to mark bad and erase block %d" + TENDSTR), blockInNAND)); + } + else { + yaffs_ExtendedTags tags; + int chunkId = blockInNAND * dev->nChunksPerBlock; + + __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__); + + memset(buffer, 0xff, dev->nDataBytesPerChunk); + yaffs_InitialiseTags(&tags); + tags.sequenceNumber = YAFFS_SEQUENCE_BAD_BLOCK; + if (dev->writeChunkWithTagsToNAND(dev, chunkId - + dev->chunkOffset, buffer, &tags) != YAFFS_OK) + T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Failed to " + TCONT("write bad block marker to block %d") + TENDSTR), blockInNAND)); + + yaffs_ReleaseTempBuffer(dev, buffer, __LINE__); + } } - if (chunkId > YAFFS_MAX_CHUNK_ID) { - return NULL; - } + bi->blockState = YAFFS_BLOCK_STATE_DEAD; + bi->gcPrioritise = 0; + bi->needsRetiring = 0; - /* First check we're tall enough (ie enough topLevel) */ + dev->nRetiredBlocks++; +} - x = chunkId >> YAFFS_TNODES_LEVEL0_BITS; - requiredTallness = 0; - while (x) { - x >>= YAFFS_TNODES_INTERNAL_BITS; - requiredTallness++; - } +/* + * Functions for robustisizing TODO + * + */ + +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) +{ +} - if (requiredTallness > fStruct->topLevel) { - /* Not tall enough,gotta make the tree taller */ - for (i = fStruct->topLevel; i < requiredTallness; i++) { +void yaffs_HandleChunkError(yaffs_Device *dev, yaffs_BlockInfo *bi) +{ + if(!bi->gcPrioritise){ + bi->gcPrioritise = 1; + dev->hasPendingPrioritisedGCs = 1; + bi->chunkErrorStrikes ++; - tn = yaffs_GetTnode(dev); + if(bi->chunkErrorStrikes > 3){ + bi->needsRetiring = 1; /* Too many stikes, so retire this */ + T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Block struck out" TENDSTR))); - if (tn) { - tn->internal[0] = fStruct->top; - fStruct->top = tn; - } else { - T(YAFFS_TRACE_ERROR, - (TSTR("yaffs: no more tnodes" TENDSTR))); - } } - - fStruct->topLevel = requiredTallness; + } +} - /* Traverse down to level 0, adding anything we need */ - - l = fStruct->topLevel; - tn = fStruct->top; - while (l > 0 && tn) { - x = (chunkId >> - ( YAFFS_TNODES_LEVEL0_BITS + - (l - 1) * YAFFS_TNODES_INTERNAL_BITS)) & - YAFFS_TNODES_INTERNAL_MASK; - +static void yaffs_HandleWriteChunkError(yaffs_Device * dev, int chunkInNAND, int erasedOk) +{ - if (!tn->internal[x]) - tn->internal[x] = yaffs_GetTnode(dev); + int blockInNAND = chunkInNAND / dev->nChunksPerBlock; + yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND); - tn = tn->internal[x]; - l--; + yaffs_HandleChunkError(dev,bi); + + + if(erasedOk ) { + /* Was an actual write failure, so mark the block for retirement */ + bi->needsRetiring = 1; + T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS, + (TSTR("**>> Block %d needs retiring" TENDSTR), blockInNAND)); + } - - return tn; + + /* Delete the chunk */ + yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__); } -static int yaffs_FindChunkInGroup(yaffs_Device * dev, int theChunk, - yaffs_ExtendedTags * tags, int objectId, - int chunkInInode) + +/*---------------- Name handling functions ------------*/ + +static __u16 yaffs_CalcNameSum(const YCHAR * name) { - int j; + __u16 sum = 0; + __u16 i = 1; - for (j = 0; theChunk && j < dev->chunkGroupSize; j++) { - if (yaffs_CheckChunkBit - (dev, theChunk / dev->nChunksPerBlock, - theChunk % dev->nChunksPerBlock)) { - yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL, - tags); - if (yaffs_TagsMatch(tags, objectId, chunkInInode)) { - /* found it; */ - return theChunk; + const YUCHAR *bname = (const YUCHAR *) name; + if (bname) { + while ((*bname) && (i < (YAFFS_MAX_NAME_LENGTH/2))) { - } +#ifdef CONFIG_YAFFS_CASE_INSENSITIVE + sum += yaffs_toupper(*bname) * i; +#else + sum += (*bname) * i; +#endif + i++; + bname++; } - theChunk++; } - return -1; + return sum; +} + +static void yaffs_SetObjectName(yaffs_Object * obj, const YCHAR * name) +{ +#ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM + memset(obj->shortName,0,sizeof (YCHAR) * (YAFFS_SHORT_NAME_LENGTH+1)); + if (name && yaffs_strlen(name) <= YAFFS_SHORT_NAME_LENGTH) { + yaffs_strcpy(obj->shortName, name); + } else { + obj->shortName[0] = _Y('\0'); + } +#endif + obj->sum = yaffs_CalcNameSum(name); } +/*-------------------- TNODES ------------------- -/* DeleteWorker scans backwards through the tnode tree and deletes all the - * chunks and tnodes in the file - * Returns 1 if the tree was deleted. - * Returns 0 if it stopped early due to hitting the limit and the delete is incomplete. + * List of spare tnodes + * The list is hooked together using the first pointer + * in the tnode. + */ + +/* yaffs_CreateTnodes creates a bunch more tnodes and + * adds them to the tnode free list. + * Don't use this function directly */ -static int yaffs_DeleteWorker(yaffs_Object * in, yaffs_Tnode * tn, __u32 level, - int chunkOffset, int *limit) +static int yaffs_CreateTnodes(yaffs_Device * dev, int nTnodes) { int i; - int chunkInInode; - int theChunk; - yaffs_ExtendedTags tags; - int foundChunk; - yaffs_Device *dev = in->myDev; - - int allDone = 1; + int tnodeSize; + yaffs_Tnode *newTnodes; + __u8 *mem; + yaffs_Tnode *curr; + yaffs_Tnode *next; + yaffs_TnodeList *tnl; - if (tn) { - if (level > 0) { + if (nTnodes < 1) + return YAFFS_OK; + + /* Calculate the tnode size in bytes for variable width tnode support. + * Must be a multiple of 32-bits */ + tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8; - for (i = YAFFS_NTNODES_INTERNAL - 1; allDone && i >= 0; - i--) { - if (tn->internal[i]) { - if (limit && (*limit) < 0) { - allDone = 0; - } else { - allDone = - yaffs_DeleteWorker(in, - tn-> - internal - [i], - level - - 1, - (chunkOffset - << - YAFFS_TNODES_INTERNAL_BITS) - + i, - limit); - } - if (allDone) { - yaffs_FreeTnode(dev, - tn-> - internal[i]); - tn->internal[i] = NULL; - } - } + if(tnodeSize < sizeof(yaffs_Tnode)) + tnodeSize = sizeof(yaffs_Tnode); + - } - return (allDone) ? 1 : 0; - } else if (level == 0) { - int hitLimit = 0; + /* make these things */ - for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0 && !hitLimit; - i--) { - if (tn->level0[i]) { + newTnodes = YMALLOC(nTnodes * tnodeSize); + mem = (__u8 *)newTnodes; - chunkInInode = - (chunkOffset << - YAFFS_TNODES_LEVEL0_BITS) + i; + if (!newTnodes) { + T(YAFFS_TRACE_ERROR, + (TSTR("yaffs: Could not allocate Tnodes" TENDSTR))); + return YAFFS_FAIL; + } - theChunk = - tn->level0[i] << dev-> - chunkGroupBits; - - foundChunk = - yaffs_FindChunkInGroup(dev, - theChunk, - &tags, - in->objectId, - chunkInInode); + /* Hook them into the free list */ +#if 0 + 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] = (void *)1; +#endif + } - if (foundChunk > 0) { - yaffs_DeleteChunk(dev, - foundChunk, 1, - __LINE__); - in->nDataChunks--; - if (limit) { - *limit = *limit - 1; - if (*limit <= 0) { - hitLimit = 1; - } - } + newTnodes[nTnodes - 1].internal[0] = dev->freeTnodes; +#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG + newTnodes[nTnodes - 1].internal[YAFFS_NTNODES_INTERNAL] = (void *)1; +#endif + dev->freeTnodes = newTnodes; +#else + /* New hookup for wide tnodes */ + for(i = 0; i < nTnodes -1; i++) { + curr = (yaffs_Tnode *) &mem[i * tnodeSize]; + next = (yaffs_Tnode *) &mem[(i+1) * tnodeSize]; + curr->internal[0] = next; + } + + curr = (yaffs_Tnode *) &mem[(nTnodes - 1) * tnodeSize]; + curr->internal[0] = dev->freeTnodes; + dev->freeTnodes = (yaffs_Tnode *)mem; - } +#endif - tn->level0[i] = 0; - } - } - return (i < 0) ? 1 : 0; + 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) { + T(YAFFS_TRACE_ERROR, + (TSTR + ("yaffs: Could not add tnodes to management list" TENDSTR))); + return YAFFS_FAIL; + } else { + tnl->tnodes = newTnodes; + tnl->next = dev->allocatedTnodeList; + dev->allocatedTnodeList = tnl; } - return 1; + T(YAFFS_TRACE_ALLOCATE, (TSTR("yaffs: Tnodes added" TENDSTR))); + return YAFFS_OK; } -static void yaffs_SoftDeleteChunk(yaffs_Device * dev, int chunk) -{ +/* GetTnode gets us a clean tnode. Tries to make allocate more if we run out */ - yaffs_BlockInfo *theBlock; +static yaffs_Tnode *yaffs_GetTnodeRaw(yaffs_Device * dev) +{ + yaffs_Tnode *tn = NULL; - T(YAFFS_TRACE_DELETION, (TSTR("soft delete chunk %d" TENDSTR), chunk)); + /* If there are none left make more */ + if (!dev->freeTnodes) { + yaffs_CreateTnodes(dev, YAFFS_ALLOCATION_NTNODES); + } - theBlock = yaffs_GetBlockInfo(dev, chunk / dev->nChunksPerBlock); - if (theBlock) { - theBlock->softDeletions++; - dev->nFreeChunks++; + if (dev->freeTnodes) { + tn = dev->freeTnodes; +#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG + if (tn->internal[YAFFS_NTNODES_INTERNAL] != (void *)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--; } + + dev->nCheckpointBlocksRequired = 0; /* force recalculation*/ + + return tn; } -/* 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) +static yaffs_Tnode *yaffs_GetTnode(yaffs_Device * dev) { - int i; - int theChunk; - int allDone = 1; - yaffs_Device *dev = in->myDev; + yaffs_Tnode *tn = yaffs_GetTnodeRaw(dev); + int tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8; - if (tn) { - if (level > 0) { + if(tnodeSize < sizeof(yaffs_Tnode)) + tnodeSize = sizeof(yaffs_Tnode); + + if(tn) + memset(tn, 0, tnodeSize); - 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(dev, - tn-> - internal[i]); - tn->internal[i] = NULL; - } else { - /* Hoosterman... how could this happen? */ - } - } - } - return (allDone) ? 1 : 0; - } else if (level == 0) { + return tn; +} - 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 not larger than - * a block. - */ - theChunk = - (tn->level0[i] << dev-> - chunkGroupBits); +/* FreeTnode frees up a tnode and puts it back on the free list */ +static void yaffs_FreeTnode(yaffs_Device * dev, yaffs_Tnode * tn) +{ + 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] = (void *)1; +#endif + tn->internal[0] = dev->freeTnodes; + dev->freeTnodes = tn; + dev->nFreeTnodes++; + } + dev->nCheckpointBlocksRequired = 0; /* force recalculation*/ + +} - yaffs_SoftDeleteChunk(dev, theChunk); - tn->level0[i] = 0; - } +static void yaffs_DeinitialiseTnodes(yaffs_Device * dev) +{ + /* Free the list of allocated tnodes */ + yaffs_TnodeList *tmp; - } - return 1; + while (dev->allocatedTnodeList) { + tmp = dev->allocatedTnodeList->next; - } + YFREE(dev->allocatedTnodeList->tnodes); + YFREE(dev->allocatedTnodeList); + dev->allocatedTnodeList = tmp; } - return 1; - + dev->freeTnodes = NULL; + dev->nFreeTnodes = 0; } -static void yaffs_SoftDeleteFile(yaffs_Object * obj) +static void yaffs_InitialiseTnodes(yaffs_Device * dev) { - if (obj->deleted && - obj->variantType == YAFFS_OBJECT_TYPE_FILE && !obj->softDeleted) { - if (obj->nDataChunks <= 0) { - /* Empty file with no duplicate object headers, 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; - } - } -} + dev->allocatedTnodeList = NULL; + dev->freeTnodes = NULL; + dev->nFreeTnodes = 0; + dev->nTnodesCreated = 0; -/* Pruning removes any part of the file structure tree that is beyond the - * bounds of the file (ie that does not point to chunks). - * - * A file should only get pruned when its size is reduced. - * - * Before pruning, the chunks must be pulled from the tree and the - * level 0 tnode entries must be zeroed out. - * Could also use this for file deletion, but that's probably better handled - * by a special case. - */ +} -static yaffs_Tnode *yaffs_PruneWorker(yaffs_Device * dev, yaffs_Tnode * tn, - __u32 level, int del0) -{ - int i; - int hasData; - if (tn) { - hasData = 0; +void yaffs_PutLevel0Tnode(yaffs_Device *dev, yaffs_Tnode *tn, unsigned pos, unsigned val) +{ + __u32 *map = (__u32 *)tn; + __u32 bitInMap; + __u32 bitInWord; + __u32 wordInMap; + __u32 mask; + + pos &= YAFFS_TNODES_LEVEL0_MASK; + val >>= dev->chunkGroupBits; + + bitInMap = pos * dev->tnodeWidth; + wordInMap = bitInMap /32; + bitInWord = bitInMap & (32 -1); + + mask = dev->tnodeMask << bitInWord; + + map[wordInMap] &= ~mask; + map[wordInMap] |= (mask & (val << bitInWord)); + + if(dev->tnodeWidth > (32-bitInWord)) { + bitInWord = (32 - bitInWord); + wordInMap++;; + mask = dev->tnodeMask >> (/*dev->tnodeWidth -*/ bitInWord); + map[wordInMap] &= ~mask; + map[wordInMap] |= (mask & (val >> bitInWord)); + } +} + +static __u32 yaffs_GetChunkGroupBase(yaffs_Device *dev, yaffs_Tnode *tn, unsigned pos) +{ + __u32 *map = (__u32 *)tn; + __u32 bitInMap; + __u32 bitInWord; + __u32 wordInMap; + __u32 val; + + pos &= YAFFS_TNODES_LEVEL0_MASK; + + bitInMap = pos * dev->tnodeWidth; + wordInMap = bitInMap /32; + bitInWord = bitInMap & (32 -1); + + val = map[wordInMap] >> bitInWord; + + if(dev->tnodeWidth > (32-bitInWord)) { + bitInWord = (32 - bitInWord); + wordInMap++;; + val |= (map[wordInMap] << bitInWord); + } + + val &= dev->tnodeMask; + val <<= dev->chunkGroupBits; + + return val; +} - for (i = 0; i < YAFFS_NTNODES_INTERNAL; i++) { - if (tn->internal[i] && level > 0) { - tn->internal[i] = - yaffs_PruneWorker(dev, tn->internal[i], - level - 1, - (i == 0) ? del0 : 1); - } +/* ------------------- End of individual tnode manipulation -----------------*/ - if (tn->internal[i]) { - hasData++; - } - } +/* ---------Functions to manipulate the look-up tree (made up of tnodes) ------ + * The look up tree is represented by the top tnode and the number of topLevel + * in the tree. 0 means only the level 0 tnode is in the tree. + */ - if (hasData == 0 && del0) { - /* Free and return NULL */ +/* FindLevel0Tnode finds the level 0 tnode, if one exists. */ +static yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device * dev, + yaffs_FileStructure * fStruct, + __u32 chunkId) +{ - yaffs_FreeTnode(dev, tn); - tn = NULL; - } + yaffs_Tnode *tn = fStruct->top; + __u32 i; + int requiredTallness; + int level = fStruct->topLevel; + /* Check sane level and chunk Id */ + if (level < 0 || level > YAFFS_TNODES_MAX_LEVEL) { + return NULL; } - return tn; + if (chunkId > YAFFS_MAX_CHUNK_ID) { + return NULL; + } -} + /* First check we're tall enough (ie enough topLevel) */ -static int yaffs_PruneFileStructure(yaffs_Device * dev, - yaffs_FileStructure * fStruct) -{ - int i; - int hasData; - int done = 0; - yaffs_Tnode *tn; - - if (fStruct->topLevel > 0) { - fStruct->top = - yaffs_PruneWorker(dev, fStruct->top, fStruct->topLevel, 0); - - /* Now we have a tree with all the non-zero branches NULL but the height - * is the same as it was. - * Let's see if we can trim internal tnodes to shorten the tree. - * We can do this if only the 0th element in the tnode is in use - * (ie all the non-zero are NULL) - */ + i = chunkId >> YAFFS_TNODES_LEVEL0_BITS; + requiredTallness = 0; + while (i) { + i >>= YAFFS_TNODES_INTERNAL_BITS; + requiredTallness++; + } - while (fStruct->topLevel && !done) { - tn = fStruct->top; + if (requiredTallness > fStruct->topLevel) { + /* Not tall enough, so we can't find it, return NULL. */ + return NULL; + } - hasData = 0; - for (i = 1; i < YAFFS_NTNODES_INTERNAL; i++) { - if (tn->internal[i]) { - hasData++; - } - } + /* Traverse down to level 0 */ + while (level > 0 && tn) { + tn = tn-> + internal[(chunkId >> + ( YAFFS_TNODES_LEVEL0_BITS + + (level - 1) * + YAFFS_TNODES_INTERNAL_BITS) + ) & + YAFFS_TNODES_INTERNAL_MASK]; + level--; - if (!hasData) { - fStruct->top = tn->internal[0]; - fStruct->topLevel--; - yaffs_FreeTnode(dev, tn); - } else { - done = 1; - } - } } - return YAFFS_OK; + return tn; } -/*-------------------- End of File Structure functions.-------------------*/ - -/* yaffs_CreateFreeObjects creates a bunch more objects and - * adds them to the object free list. +/* AddOrFindLevel0Tnode finds the level 0 tnode if it exists, otherwise first expands the tree. + * This happens in two steps: + * 1. If the tree isn't tall enough, then make it taller. + * 2. Scan down the tree towards the level 0 tnode adding tnodes if required. + * + * Used when modifying the tree. + * + * If the tn argument is NULL, then a fresh tnode will be added otherwise the specified tn will + * be plugged into the ttree. */ -static int yaffs_CreateFreeObjects(yaffs_Device * dev, int nObjects) + +static yaffs_Tnode *yaffs_AddOrFindLevel0Tnode(yaffs_Device * dev, + yaffs_FileStructure * fStruct, + __u32 chunkId, + yaffs_Tnode *passedTn) { + + int requiredTallness; int i; - yaffs_Object *newObjects; - yaffs_ObjectList *list; + int l; + yaffs_Tnode *tn; - if (nObjects < 1) - return YAFFS_OK; + __u32 x; - /* make these things */ - newObjects = YMALLOC(nObjects * sizeof(yaffs_Object)); - if (!newObjects) { - 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++) { - newObjects[i].siblings.next = - (struct list_head *)(&newObjects[i + 1]); + /* Check sane level and page Id */ + if (fStruct->topLevel < 0 || fStruct->topLevel > YAFFS_TNODES_MAX_LEVEL) { + return NULL; } - newObjects[nObjects - 1].siblings.next = (void *)dev->freeObjects; - dev->freeObjects = newObjects; - dev->nFreeObjects += nObjects; - dev->nObjectsCreated += nObjects; + if (chunkId > YAFFS_MAX_CHUNK_ID) { + return NULL; + } - /* Now add this bunch of Objects to a list for freeing up. */ + /* First check we're tall enough (ie enough topLevel) */ - list = YMALLOC(sizeof(yaffs_ObjectList)); - if (!list) { - T(YAFFS_TRACE_ALLOCATE, - (TSTR("Could not add objects to management list" TENDSTR))); - } else { - list->objects = newObjects; - list->next = dev->allocatedObjectList; - dev->allocatedObjectList = list; + x = chunkId >> YAFFS_TNODES_LEVEL0_BITS; + requiredTallness = 0; + while (x) { + x >>= YAFFS_TNODES_INTERNAL_BITS; + requiredTallness++; } - return YAFFS_OK; -} + if (requiredTallness > fStruct->topLevel) { + /* Not tall enough,gotta make the tree taller */ + for (i = fStruct->topLevel; i < requiredTallness; i++) { + + tn = yaffs_GetTnode(dev); -/* AllocateEmptyObject gets us a clean Object. Tries to make allocate more if we run out */ -static yaffs_Object *yaffs_AllocateEmptyObject(yaffs_Device * dev) -{ - yaffs_Object *tn = NULL; + if (tn) { + tn->internal[0] = fStruct->top; + fStruct->top = tn; + } else { + T(YAFFS_TRACE_ERROR, + (TSTR("yaffs: no more tnodes" TENDSTR))); + } + } - /* If there are none left make more */ - if (!dev->freeObjects) { - yaffs_CreateFreeObjects(dev, YAFFS_ALLOCATION_NOBJECTS); + fStruct->topLevel = requiredTallness; } - if (dev->freeObjects) { - tn = dev->freeObjects; - dev->freeObjects = - (yaffs_Object *) (dev->freeObjects->siblings.next); - dev->nFreeObjects--; - - /* Now sweeten it up... */ - - memset(tn, 0, sizeof(yaffs_Object)); - tn->myDev = dev; - tn->chunkId = -1; - tn->variantType = YAFFS_OBJECT_TYPE_UNKNOWN; - INIT_LIST_HEAD(&(tn->hardLinks)); - INIT_LIST_HEAD(&(tn->hashLink)); - INIT_LIST_HEAD(&tn->siblings); + /* Traverse down to level 0, adding anything we need */ - /* Add it to the lost and found directory. - * NB Can't put root or lostNFound in lostNFound so - * check if lostNFound exists first - */ - if (dev->lostNFoundDir) { - yaffs_AddObjectToDirectory(dev->lostNFoundDir, tn); + l = fStruct->topLevel; + tn = fStruct->top; + + if(l > 0) { + while (l > 0 && tn) { + x = (chunkId >> + ( YAFFS_TNODES_LEVEL0_BITS + + (l - 1) * YAFFS_TNODES_INTERNAL_BITS)) & + YAFFS_TNODES_INTERNAL_MASK; + + + if((l>1) && !tn->internal[x]){ + /* Add missing non-level-zero tnode */ + tn->internal[x] = yaffs_GetTnode(dev); + + } else if(l == 1) { + /* Looking from level 1 at level 0 */ + if (passedTn) { + /* If we already have one, then release it.*/ + if(tn->internal[x]) + yaffs_FreeTnode(dev,tn->internal[x]); + tn->internal[x] = passedTn; + + } else if(!tn->internal[x]) { + /* Don't have one, none passed in */ + tn->internal[x] = yaffs_GetTnode(dev); + } + } + + tn = tn->internal[x]; + l--; + } + } else { + /* top is level 0 */ + if(passedTn) { + memcpy(tn,passedTn,(dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8); + yaffs_FreeTnode(dev,passedTn); } } return tn; } -static yaffs_Object *yaffs_CreateFakeDirectory(yaffs_Device * dev, int number, - __u32 mode) +static int yaffs_FindChunkInGroup(yaffs_Device * dev, int theChunk, + yaffs_ExtendedTags * tags, int objectId, + int chunkInInode) { + int j; - yaffs_Object *obj = - yaffs_CreateNewObject(dev, number, YAFFS_OBJECT_TYPE_DIRECTORY); - if (obj) { - obj->fake = 1; /* it is fake so it has no NAND presence... */ - obj->renameAllowed = 0; /* ... and we're not allowed to rename it... */ - obj->unlinkAllowed = 0; /* ... or unlink it */ - obj->deleted = 0; - obj->unlinked = 0; - obj->yst_mode = mode; - obj->myDev = dev; - obj->chunkId = 0; /* Not a valid chunk. */ - } - - return obj; + for (j = 0; theChunk && j < dev->chunkGroupSize; j++) { + if (yaffs_CheckChunkBit + (dev, theChunk / dev->nChunksPerBlock, + theChunk % dev->nChunksPerBlock)) { + yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL, + tags); + if (yaffs_TagsMatch(tags, objectId, chunkInInode)) { + /* found it; */ + return theChunk; + } + } + theChunk++; + } + return -1; } -static void yaffs_UnhashObject(yaffs_Object * tn) -{ - int bucket; - yaffs_Device *dev = tn->myDev; - /* If it is still linked into the bucket list, free from the list */ - if (!list_empty(&tn->hashLink)) { - list_del_init(&tn->hashLink); - bucket = yaffs_HashFunction(tn->objectId); - dev->objectBucket[bucket].count--; - } - -} +/* DeleteWorker scans backwards through the tnode tree and deletes all the + * chunks and tnodes in the file + * Returns 1 if the tree was deleted. + * Returns 0 if it stopped early due to hitting the limit and the delete is incomplete. + */ -/* FreeObject frees up a Object and puts it back on the free list */ -static void yaffs_FreeObject(yaffs_Object * tn) +static int yaffs_DeleteWorker(yaffs_Object * in, yaffs_Tnode * tn, __u32 level, + int chunkOffset, int *limit) { + int i; + int chunkInInode; + int theChunk; + yaffs_ExtendedTags tags; + int foundChunk; + yaffs_Device *dev = in->myDev; - yaffs_Device *dev = tn->myDev; + int allDone = 1; -#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 + if (tn) { + if (level > 0) { - yaffs_UnhashObject(tn); + for (i = YAFFS_NTNODES_INTERNAL - 1; allDone && i >= 0; + i--) { + if (tn->internal[i]) { + if (limit && (*limit) < 0) { + allDone = 0; + } else { + allDone = + yaffs_DeleteWorker(in, + tn-> + internal + [i], + level - + 1, + (chunkOffset + << + YAFFS_TNODES_INTERNAL_BITS) + + i, + limit); + } + if (allDone) { + yaffs_FreeTnode(dev, + tn-> + internal[i]); + tn->internal[i] = NULL; + } + } - /* Link into the free list. */ - tn->siblings.next = (struct list_head *)(dev->freeObjects); - dev->freeObjects = tn; - dev->nFreeObjects++; -} + } + return (allDone) ? 1 : 0; + } else if (level == 0) { + int hitLimit = 0; -#ifdef __KERNEL__ + for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0 && !hitLimit; + i--) { + theChunk = yaffs_GetChunkGroupBase(dev,tn,i); + if (theChunk) { -void yaffs_HandleDeferedFree(yaffs_Object * obj) -{ - if (obj->deferedFree) { - yaffs_FreeObject(obj); - } -} + chunkInInode = + (chunkOffset << + YAFFS_TNODES_LEVEL0_BITS) + i; -#endif + foundChunk = + yaffs_FindChunkInGroup(dev, + theChunk, + &tags, + in->objectId, + chunkInInode); -static void yaffs_DeinitialiseObjects(yaffs_Device * dev) -{ - /* Free the list of allocated Objects */ + if (foundChunk > 0) { + yaffs_DeleteChunk(dev, + foundChunk, 1, + __LINE__); + in->nDataChunks--; + if (limit) { + *limit = *limit - 1; + if (*limit <= 0) { + hitLimit = 1; + } + } - yaffs_ObjectList *tmp; + } - while (dev->allocatedObjectList) { - tmp = dev->allocatedObjectList->next; - YFREE(dev->allocatedObjectList->objects); - YFREE(dev->allocatedObjectList); + yaffs_PutLevel0Tnode(dev,tn,i,0); + } + + } + return (i < 0) ? 1 : 0; + + } - dev->allocatedObjectList = tmp; } - dev->freeObjects = NULL; - dev->nFreeObjects = 0; + return 1; + } -static void yaffs_InitialiseObjects(yaffs_Device * dev) +static void yaffs_SoftDeleteChunk(yaffs_Device * dev, int chunk) { - int i; - dev->allocatedObjectList = NULL; - dev->freeObjects = NULL; - dev->nFreeObjects = 0; + yaffs_BlockInfo *theBlock; - for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) { - INIT_LIST_HEAD(&dev->objectBucket[i].list); - dev->objectBucket[i].count = 0; - } + T(YAFFS_TRACE_DELETION, (TSTR("soft delete chunk %d" TENDSTR), chunk)); + theBlock = yaffs_GetBlockInfo(dev, chunk / dev->nChunksPerBlock); + if (theBlock) { + theBlock->softDeletions++; + dev->nFreeChunks++; + } } -static int yaffs_FindNiceObjectBucket(yaffs_Device * dev) +/* 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) { - static int x = 0; int i; - int l = 999; - int lowest = 999999; + int theChunk; + int allDone = 1; + yaffs_Device *dev = in->myDev; - /* First let's see if we can find one that's empty. */ + if (tn) { + if (level > 0) { - for (i = 0; i < 10 && lowest > 0; i++) { - x++; - x %= YAFFS_NOBJECT_BUCKETS; - if (dev->objectBucket[x].count < lowest) { - lowest = dev->objectBucket[x].count; - l = x; - } + 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(dev, + 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--) { + theChunk = yaffs_GetChunkGroupBase(dev,tn,i); + if (theChunk) { + /* Note this does not find the real chunk, only the chunk group. + * We make an assumption that a chunk group is not larger than + * a block. + */ + yaffs_SoftDeleteChunk(dev, theChunk); + yaffs_PutLevel0Tnode(dev,tn,i,0); + } - /* If we didn't find an empty list, then try - * looking a bit further for a short one - */ + } + return 1; - for (i = 0; i < 10 && lowest > 3; i++) { - x++; - x %= YAFFS_NOBJECT_BUCKETS; - if (dev->objectBucket[x].count < lowest) { - lowest = dev->objectBucket[x].count; - l = x; } } - return l; + return 1; + } -static int yaffs_CreateNewObjectNumber(yaffs_Device * dev) +static void yaffs_SoftDeleteFile(yaffs_Object * obj) { - int bucket = yaffs_FindNiceObjectBucket(dev); + if (obj->deleted && + obj->variantType == YAFFS_OBJECT_TYPE_FILE && !obj->softDeleted) { + if (obj->nDataChunks <= 0) { + /* Empty file with no duplicate object headers, 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; + } + } +} - /* Now find an object value that has not already been taken - * by scanning the list. - */ +/* Pruning removes any part of the file structure tree that is beyond the + * bounds of the file (ie that does not point to chunks). + * + * A file should only get pruned when its size is reduced. + * + * Before pruning, the chunks must be pulled from the tree and the + * level 0 tnode entries must be zeroed out. + * Could also use this for file deletion, but that's probably better handled + * by a special case. + */ - int found = 0; - struct list_head *i; +static yaffs_Tnode *yaffs_PruneWorker(yaffs_Device * dev, yaffs_Tnode * tn, + __u32 level, int del0) +{ + int i; + int hasData; - __u32 n = (__u32) bucket; + if (tn) { + hasData = 0; - /* yaffs_CheckObjectHashSanity(); */ + for (i = 0; i < YAFFS_NTNODES_INTERNAL; i++) { + if (tn->internal[i] && level > 0) { + tn->internal[i] = + yaffs_PruneWorker(dev, tn->internal[i], + level - 1, + (i == 0) ? del0 : 1); + } - while (!found) { - found = 1; - n += YAFFS_NOBJECT_BUCKETS; - if (1 || dev->objectBucket[bucket].count > 0) { - list_for_each(i, &dev->objectBucket[bucket].list) { - /* If there is already one in the list */ - if (i - && list_entry(i, yaffs_Object, - hashLink)->objectId == n) { - found = 0; - } + if (tn->internal[i]) { + hasData++; } } + + if (hasData == 0 && del0) { + /* Free and return NULL */ + + yaffs_FreeTnode(dev, tn); + tn = NULL; + } + } + return tn; - return n; } -static void yaffs_HashObject(yaffs_Object * in) +static int yaffs_PruneFileStructure(yaffs_Device * dev, + yaffs_FileStructure * fStruct) { - int bucket = yaffs_HashFunction(in->objectId); - yaffs_Device *dev = in->myDev; + int i; + int hasData; + int done = 0; + yaffs_Tnode *tn; - list_add(&in->hashLink, &dev->objectBucket[bucket].list); - dev->objectBucket[bucket].count++; + if (fStruct->topLevel > 0) { + fStruct->top = + yaffs_PruneWorker(dev, fStruct->top, fStruct->topLevel, 0); -} + /* Now we have a tree with all the non-zero branches NULL but the height + * is the same as it was. + * Let's see if we can trim internal tnodes to shorten the tree. + * We can do this if only the 0th element in the tnode is in use + * (ie all the non-zero are NULL) + */ -yaffs_Object *yaffs_FindObjectByNumber(yaffs_Device * dev, __u32 number) -{ - int bucket = yaffs_HashFunction(number); - struct list_head *i; - yaffs_Object *in; + while (fStruct->topLevel && !done) { + tn = fStruct->top; - list_for_each(i, &dev->objectBucket[bucket].list) { - /* Look if it is in the list */ - if (i) { - 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 + hasData = 0; + for (i = 1; i < YAFFS_NTNODES_INTERNAL; i++) { + if (tn->internal[i]) { + hasData++; + } + } - return in; + if (!hasData) { + fStruct->top = tn->internal[0]; + fStruct->topLevel--; + yaffs_FreeTnode(dev, tn); + } else { + done = 1; } } } - return NULL; + return YAFFS_OK; } -yaffs_Object *yaffs_CreateNewObject(yaffs_Device * dev, int number, - yaffs_ObjectType type) -{ +/*-------------------- End of File Structure functions.-------------------*/ - yaffs_Object *theObject; +/* yaffs_CreateFreeObjects creates a bunch more objects and + * adds them to the object free list. + */ +static int yaffs_CreateFreeObjects(yaffs_Device * dev, int nObjects) +{ + int i; + yaffs_Object *newObjects; + yaffs_ObjectList *list; - if (number < 0) { - number = yaffs_CreateNewObjectNumber(dev); - } + if (nObjects < 1) + return YAFFS_OK; - theObject = yaffs_AllocateEmptyObject(dev); + /* make these things */ + newObjects = YMALLOC(nObjects * sizeof(yaffs_Object)); + list = YMALLOC(sizeof(yaffs_ObjectList)); + + if (!newObjects || !list) { + if(newObjects) + YFREE(newObjects); + if(list) + YFREE(list); + 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++) { + newObjects[i].siblings.next = + (struct ylist_head *)(&newObjects[i + 1]); + } + + newObjects[nObjects - 1].siblings.next = (void *)dev->freeObjects; + dev->freeObjects = newObjects; + dev->nFreeObjects += nObjects; + dev->nObjectsCreated += nObjects; + + /* Now add this bunch of Objects to a list for freeing up. */ + + list->objects = newObjects; + list->next = dev->allocatedObjectList; + dev->allocatedObjectList = list; + + return YAFFS_OK; +} + + +/* AllocateEmptyObject gets us a clean Object. Tries to make allocate more if we run out */ +static yaffs_Object *yaffs_AllocateEmptyObject(yaffs_Device * dev) +{ + yaffs_Object *tn = NULL; + +#ifdef VALGRIND_TEST + tn = YMALLOC(sizeof(yaffs_Object)); +#else + /* If there are none left make more */ + if (!dev->freeObjects) { + yaffs_CreateFreeObjects(dev, YAFFS_ALLOCATION_NOBJECTS); + } + + if (dev->freeObjects) { + tn = dev->freeObjects; + dev->freeObjects = + (yaffs_Object *) (dev->freeObjects->siblings.next); + dev->nFreeObjects--; + } +#endif + if(tn){ + /* Now sweeten it up... */ + + memset(tn, 0, sizeof(yaffs_Object)); + tn->beingCreated = 1; + + tn->myDev = dev; + tn->hdrChunk = 0; + tn->variantType = YAFFS_OBJECT_TYPE_UNKNOWN; + YINIT_LIST_HEAD(&(tn->hardLinks)); + YINIT_LIST_HEAD(&(tn->hashLink)); + YINIT_LIST_HEAD(&tn->siblings); + + + /* Now make the directory sane */ + if(dev->rootDir){ + tn->parent = dev->rootDir; + ylist_add(&(tn->siblings),&dev->rootDir->variant.directoryVariant.children); + } + + /* Add it to the lost and found directory. + * NB Can't put root or lostNFound in lostNFound so + * check if lostNFound exists first + */ + if (dev->lostNFoundDir) { + yaffs_AddObjectToDirectory(dev->lostNFoundDir, tn); + } + + tn->beingCreated = 0; + } + + dev->nCheckpointBlocksRequired = 0; /* force recalculation*/ + + return tn; +} + +static yaffs_Object *yaffs_CreateFakeDirectory(yaffs_Device * dev, int number, + __u32 mode) +{ + + yaffs_Object *obj = + yaffs_CreateNewObject(dev, number, YAFFS_OBJECT_TYPE_DIRECTORY); + if (obj) { + obj->fake = 1; /* it is fake so it might have no NAND presence... */ + obj->renameAllowed = 0; /* ... and we're not allowed to rename it... */ + obj->unlinkAllowed = 0; /* ... or unlink it */ + obj->deleted = 0; + obj->unlinked = 0; + obj->yst_mode = mode; + obj->myDev = dev; + obj->hdrChunk = 0; /* Not a valid chunk. */ + } + + return obj; + +} + +static void yaffs_UnhashObject(yaffs_Object * tn) +{ + int bucket; + yaffs_Device *dev = tn->myDev; + + /* If it is still linked into the bucket list, free from the list */ + if (!ylist_empty(&tn->hashLink)) { + ylist_del_init(&tn->hashLink); + bucket = yaffs_HashFunction(tn->objectId); + dev->objectBucket[bucket].count--; + } + +} + +/* FreeObject frees up a Object and puts it back on the free list */ +static void yaffs_FreeObject(yaffs_Object * tn) +{ + + yaffs_Device *dev = tn->myDev; + + + if(tn->parent) + YBUG(); + if(!ylist_empty(&tn->siblings)) + YBUG(); + + +#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); + +#ifdef VALGRIND_TEST + YFREE(tn); +#else + /* Link into the free list. */ + tn->siblings.next = (struct ylist_head *)(dev->freeObjects); + dev->freeObjects = tn; + dev->nFreeObjects++; +#endif + dev->nCheckpointBlocksRequired = 0; /* force recalculation*/ + +} + +#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); + YFREE(dev->allocatedObjectList); + + dev->allocatedObjectList = tmp; + } + + dev->freeObjects = NULL; + dev->nFreeObjects = 0; +} + +static void yaffs_InitialiseObjects(yaffs_Device * dev) +{ + int i; + + dev->allocatedObjectList = NULL; + dev->freeObjects = NULL; + dev->nFreeObjects = 0; + + for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) { + YINIT_LIST_HEAD(&dev->objectBucket[i].list); + dev->objectBucket[i].count = 0; + } + +} + +static int yaffs_FindNiceObjectBucket(yaffs_Device * dev) +{ + static int x = 0; + int i; + int l = 999; + int lowest = 999999; + + /* First let's see if we can find one that's empty. */ + + for (i = 0; i < 10 && lowest > 0; i++) { + x++; + x %= YAFFS_NOBJECT_BUCKETS; + if (dev->objectBucket[x].count < lowest) { + lowest = dev->objectBucket[x].count; + l = x; + } + + } + + /* If we didn't find an empty list, then try + * looking a bit further for a short one + */ + + for (i = 0; i < 10 && lowest > 3; i++) { + x++; + x %= YAFFS_NOBJECT_BUCKETS; + if (dev->objectBucket[x].count < lowest) { + lowest = dev->objectBucket[x].count; + l = x; + } + + } + + return l; +} + +static int yaffs_CreateNewObjectNumber(yaffs_Device * dev) +{ + int bucket = yaffs_FindNiceObjectBucket(dev); + + /* Now find an object value that has not already been taken + * by scanning the list. + */ + + int found = 0; + struct ylist_head *i; + + __u32 n = (__u32) bucket; + + /* yaffs_CheckObjectHashSanity(); */ + + while (!found) { + found = 1; + n += YAFFS_NOBJECT_BUCKETS; + if (1 || dev->objectBucket[bucket].count > 0) { + ylist_for_each(i, &dev->objectBucket[bucket].list) { + /* If there is already one in the list */ + if (i + && ylist_entry(i, yaffs_Object, + hashLink)->objectId == n) { + found = 0; + } + } + } + } + + + return n; +} + +static void yaffs_HashObject(yaffs_Object * in) +{ + int bucket = yaffs_HashFunction(in->objectId); + yaffs_Device *dev = in->myDev; + + ylist_add(&in->hashLink, &dev->objectBucket[bucket].list); + dev->objectBucket[bucket].count++; + +} + +yaffs_Object *yaffs_FindObjectByNumber(yaffs_Device * dev, __u32 number) +{ + int bucket = yaffs_HashFunction(number); + struct ylist_head *i; + yaffs_Object *in; + + ylist_for_each(i, &dev->objectBucket[bucket].list) { + /* Look if it is in the list */ + if (i) { + in = ylist_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; + } + } + } + + return NULL; +} + +yaffs_Object *yaffs_CreateNewObject(yaffs_Device * dev, int number, + yaffs_ObjectType type) +{ + + yaffs_Object *theObject; + yaffs_Tnode *tn = NULL; + + if (number < 0) { + number = yaffs_CreateNewObjectNumber(dev); + } + + theObject = yaffs_AllocateEmptyObject(dev); + if(!theObject) + return NULL; + + if(type == YAFFS_OBJECT_TYPE_FILE){ + tn = yaffs_GetTnode(dev); + if(!tn){ + yaffs_FreeObject(theObject); + return NULL; + } + } + + if (theObject) { theObject->fake = 0; @@ -1451,14 +2253,13 @@ yaffs_Object *yaffs_CreateNewObject(yaffs_Device * dev, int number, 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; - case YAFFS_OBJECT_TYPE_DIRECTORY: - INIT_LIST_HEAD(&theObject->variant.directoryVariant. - children); - break; - case YAFFS_OBJECT_TYPE_SYMLINK: + theObject->variant.fileVariant.top = tn; + break; + case YAFFS_OBJECT_TYPE_DIRECTORY: + YINIT_LIST_HEAD(&theObject->variant.directoryVariant. + children); + break; + case YAFFS_OBJECT_TYPE_SYMLINK: case YAFFS_OBJECT_TYPE_HARDLINK: case YAFFS_OBJECT_TYPE_SPECIAL: /* No action required */ @@ -1489,6 +2290,7 @@ static yaffs_Object *yaffs_FindOrCreateObjectByNumber(yaffs_Device * dev, return theObject; } + static YCHAR *yaffs_CloneString(const YCHAR * str) { @@ -1496,7 +2298,8 @@ static YCHAR *yaffs_CloneString(const YCHAR * str) if (str && *str) { newStr = YMALLOC((yaffs_strlen(str) + 1) * sizeof(YCHAR)); - yaffs_strcpy(newStr, str); + if(newStr) + yaffs_strcpy(newStr, str); } return newStr; @@ -1520,6 +2323,7 @@ static yaffs_Object *yaffs_MknodObject(yaffs_ObjectType type, const YCHAR * aliasString, __u32 rdev) { yaffs_Object *in; + YCHAR *str = NULL; yaffs_Device *dev = parent->myDev; @@ -1530,10 +2334,23 @@ static yaffs_Object *yaffs_MknodObject(yaffs_ObjectType type, in = yaffs_CreateNewObject(dev, -1, type); - if (in) { - in->chunkId = -1; - in->valid = 1; - in->variantType = type; + if(!in) + return YAFFS_FAIL; + + if(type == YAFFS_OBJECT_TYPE_SYMLINK){ + str = yaffs_CloneString(aliasString); + if(!str){ + yaffs_FreeObject(in); + return NULL; + } + } + + + + if (in) { + in->hdrChunk = 0; + in->valid = 1; + in->variantType = type; in->yst_mode = mode; @@ -1560,18 +2377,17 @@ static yaffs_Object *yaffs_MknodObject(yaffs_ObjectType type, switch (type) { case YAFFS_OBJECT_TYPE_SYMLINK: - in->variant.symLinkVariant.alias = - yaffs_CloneString(aliasString); + in->variant.symLinkVariant.alias = str; break; case YAFFS_OBJECT_TYPE_HARDLINK: in->variant.hardLinkVariant.equivalentObject = - equivalentObject; - in->variant.hardLinkVariant.equivalentObjectId = - equivalentObject->objectId; - list_add(&in->hardLinks, &equivalentObject->hardLinks); - break; - case YAFFS_OBJECT_TYPE_FILE: - case YAFFS_OBJECT_TYPE_DIRECTORY: + equivalentObject; + in->variant.hardLinkVariant.equivalentObjectId = + equivalentObject->objectId; + ylist_add(&in->hardLinks, &equivalentObject->hardLinks); + break; + case YAFFS_OBJECT_TYPE_FILE: + case YAFFS_OBJECT_TYPE_DIRECTORY: case YAFFS_OBJECT_TYPE_SPECIAL: case YAFFS_OBJECT_TYPE_UNKNOWN: /* do nothing */ @@ -1650,7 +2466,7 @@ static int yaffs_ChangeObjectName(yaffs_Object * obj, yaffs_Object * newDir, if (newDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) { T(YAFFS_TRACE_ALWAYS, (TSTR - ("tragendy: yaffs_ChangeObjectName: newDir is not a directory" + ("tragedy: yaffs_ChangeObjectName: newDir is not a directory" TENDSTR))); YBUG(); } @@ -1697,9 +2513,15 @@ static int yaffs_ChangeObjectName(yaffs_Object * obj, yaffs_Object * newDir, int yaffs_RenameObject(yaffs_Object * oldDir, const YCHAR * oldName, yaffs_Object * newDir, const YCHAR * newName) { - yaffs_Object *obj; - yaffs_Object *existingTarget; + yaffs_Object *obj=NULL; + yaffs_Object *existingTarget=NULL; int force = 0; + + + if(!oldDir || oldDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) + YBUG(); + if(!newDir || newDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) + YBUG(); #ifdef CONFIG_YAFFS_CASE_INSENSITIVE /* Special case for case insemsitive systems (eg. WinCE). @@ -1711,44 +2533,69 @@ int yaffs_RenameObject(yaffs_Object * oldDir, const YCHAR * oldName, } #endif + else if (yaffs_strlen(newName) > YAFFS_MAX_NAME_LENGTH) + /* ENAMETOOLONG */ + return YAFFS_FAIL; + obj = yaffs_FindObjectByName(oldDir, oldName); if (obj && obj->renameAllowed) { /* Now do the handling for an existing target, if there is one */ - existingTarget = yaffs_FindObjectByName(newDir, newName); - if (existingTarget && - existingTarget->variantType == YAFFS_OBJECT_TYPE_DIRECTORY && - !list_empty(&existingTarget->variant.directoryVariant.children)) { - /* There is a target that is a non-empty directory, so we fail */ - return YAFFS_FAIL; /* EEXIST or ENOTEMPTY */ - } else if (existingTarget && existingTarget != obj) { + existingTarget = yaffs_FindObjectByName(newDir, newName); + if (existingTarget && + existingTarget->variantType == YAFFS_OBJECT_TYPE_DIRECTORY && + !ylist_empty(&existingTarget->variant.directoryVariant.children)) { + /* There is a target that is a non-empty directory, so we fail */ + return YAFFS_FAIL; /* EEXIST or ENOTEMPTY */ + } else if (existingTarget && existingTarget != obj) { /* Nuke the target first, using shadowing, * but only if it isn't the same object */ yaffs_ChangeObjectName(obj, newDir, newName, force, existingTarget->objectId); - yaffs_Unlink(newDir, newName); + yaffs_UnlinkObject(existingTarget); } - return yaffs_ChangeObjectName(obj, newDir, newName, force, 0); + return yaffs_ChangeObjectName(obj, newDir, newName, 1, 0); } return YAFFS_FAIL; } /*------------------------- Block Management and Page Allocation ----------------*/ -static int yaffs_InitialiseBlocks(yaffs_Device * dev, int nBlocks) +static int yaffs_InitialiseBlocks(yaffs_Device * dev) { + int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1; + + dev->blockInfo = NULL; + dev->chunkBits = NULL; + dev->allocationBlock = -1; /* force it to get a new one */ - /* Todo we're assuming the malloc will pass. */ + /* If the first allocation strategy fails, thry the alternate one */ dev->blockInfo = YMALLOC(nBlocks * sizeof(yaffs_BlockInfo)); + if(!dev->blockInfo){ + dev->blockInfo = YMALLOC_ALT(nBlocks * sizeof(yaffs_BlockInfo)); + dev->blockInfoAlt = 1; + } + else + dev->blockInfoAlt = 0; + + if(dev->blockInfo){ + + /* Set up dynamic blockinfo stuff. */ + dev->chunkBitmapStride = (dev->nChunksPerBlock + 7) / 8; /* round up bytes */ + dev->chunkBits = YMALLOC(dev->chunkBitmapStride * nBlocks); + if(!dev->chunkBits){ + dev->chunkBits = YMALLOC_ALT(dev->chunkBitmapStride * nBlocks); + dev->chunkBitsAlt = 1; + } + else + dev->chunkBitsAlt = 0; + } - /* 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); @@ -1761,9 +2608,20 @@ static int yaffs_InitialiseBlocks(yaffs_Device * dev, int nBlocks) static void yaffs_DeinitialiseBlocks(yaffs_Device * dev) { - YFREE(dev->blockInfo); + if(dev->blockInfoAlt && dev->blockInfo) + YFREE_ALT(dev->blockInfo); + else if(dev->blockInfo) + YFREE(dev->blockInfo); + + dev->blockInfoAlt = 0; + dev->blockInfo = NULL; - YFREE(dev->chunkBits); + + if(dev->chunkBitsAlt && dev->chunkBits) + YFREE_ALT(dev->chunkBits); + else if(dev->chunkBits) + YFREE(dev->chunkBits); + dev->chunkBitsAlt = 0; dev->chunkBits = NULL; } @@ -1803,8 +2661,6 @@ static int yaffs_BlockNotDisqualifiedFromGC(yaffs_Device * dev, */ return (bi->sequenceNumber <= dev->oldestDirtySequence); - return 1; - } /* FindDiretiestBlock is used to select the dirtiest block (or close enough) @@ -1820,9 +2676,33 @@ static int yaffs_FindBlockForGarbageCollection(yaffs_Device * dev, int i; int iterations; int dirtiest = -1; - int pagesInUse; + int pagesInUse = 0; + int prioritised=0; yaffs_BlockInfo *bi; - static int nonAggressiveSkip = 0; + int pendingPrioritisedExist = 0; + + /* First let's see if we need to grab a prioritised block */ + if(dev->hasPendingPrioritisedGCs){ + for(i = dev->internalStartBlock; i < dev->internalEndBlock && !prioritised; i++){ + + bi = yaffs_GetBlockInfo(dev, i); + //yaffs_VerifyBlock(dev,bi,i); + + if(bi->gcPrioritise) { + pendingPrioritisedExist = 1; + if(bi->blockState == YAFFS_BLOCK_STATE_FULL && + yaffs_BlockNotDisqualifiedFromGC(dev, bi)){ + pagesInUse = (bi->pagesInUse - bi->softDeletions); + dirtiest = i; + prioritised = 1; + aggressive = 1; /* Fool the non-aggressive skip logiv below */ + } + } + } + + if(!pendingPrioritisedExist) /* None found, so we can clear this */ + dev->hasPendingPrioritisedGCs = 0; + } /* If we're doing aggressive GC then we are happy to take a less-dirty block, and * search harder. @@ -1830,14 +2710,15 @@ static int yaffs_FindBlockForGarbageCollection(yaffs_Device * dev, * block has only a few pages in use. */ - nonAggressiveSkip--; + dev->nonAggressiveSkip--; - if (!aggressive && (nonAggressiveSkip > 0)) { + if (!aggressive && (dev->nonAggressiveSkip > 0)) { return -1; } - pagesInUse = - (aggressive) ? dev->nChunksPerBlock : YAFFS_PASSIVE_GC_CHUNKS + 1; + if(!prioritised) + pagesInUse = + (aggressive) ? dev->nChunksPerBlock : YAFFS_PASSIVE_GC_CHUNKS + 1; if (aggressive) { iterations = @@ -1851,7 +2732,7 @@ static int yaffs_FindBlockForGarbageCollection(yaffs_Device * dev, } } - for (i = 0; i <= iterations && pagesInUse > 0; i++) { + for (i = 0; i <= iterations && pagesInUse > 0 && !prioritised; i++) { b++; if (b < dev->internalStartBlock || b > dev->internalEndBlock) { b = dev->internalStartBlock; @@ -1865,9 +2746,17 @@ static int yaffs_FindBlockForGarbageCollection(yaffs_Device * dev, bi = yaffs_GetBlockInfo(dev, b); +#if 0 + if (bi->blockState == YAFFS_BLOCK_STATE_CHECKPOINT) { + dirtiest = b; + pagesInUse = 0; + } + else +#endif + if (bi->blockState == YAFFS_BLOCK_STATE_FULL && - (bi->pagesInUse - bi->softDeletions) < pagesInUse && - yaffs_BlockNotDisqualifiedFromGC(dev, bi)) { + (bi->pagesInUse - bi->softDeletions) < pagesInUse && + yaffs_BlockNotDisqualifiedFromGC(dev, bi)) { dirtiest = b; pagesInUse = (bi->pagesInUse - bi->softDeletions); } @@ -1877,14 +2766,14 @@ static int yaffs_FindBlockForGarbageCollection(yaffs_Device * dev, if (dirtiest > 0) { T(YAFFS_TRACE_GC, - (TSTR("GC Selected block %d with %d free" TENDSTR), dirtiest, - dev->nChunksPerBlock - pagesInUse)); + (TSTR("GC Selected block %d with %d free, prioritised:%d" TENDSTR), dirtiest, + dev->nChunksPerBlock - pagesInUse,prioritised)); } dev->oldestDirtySequence = 0; if (dirtiest > 0) { - nonAggressiveSkip = 4; + dev->nonAggressiveSkip = 4; } return dirtiest; @@ -1899,9 +2788,15 @@ static void yaffs_BlockBecameDirty(yaffs_Device * dev, int blockNo) /* If the block is still healthy erase it and mark as clean. * If the block has had a data failure, then retire it. */ + + T(YAFFS_TRACE_GC | YAFFS_TRACE_ERASE, + (TSTR("yaffs_BlockBecameDirty block %d state %d %s"TENDSTR), + blockNo, bi->blockState, (bi->needsRetiring) ? "needs retiring" : "")); + bi->blockState = YAFFS_BLOCK_STATE_DIRTY; if (!bi->needsRetiring) { + yaffs_InvalidateCheckpoint(dev); erasedOk = yaffs_EraseBlockInNAND(dev, blockNo); if (!erasedOk) { dev->nErasureFailures++; @@ -1910,7 +2805,8 @@ static void yaffs_BlockBecameDirty(yaffs_Device * dev, int blockNo) } } - if (erasedOk && (yaffs_traceMask & YAFFS_TRACE_ERASE)) { + if (erasedOk && + ((yaffs_traceMask & YAFFS_TRACE_ERASE) || !yaffs_SkipVerification(dev))) { int i; for (i = 0; i < dev->nChunksPerBlock; i++) { if (!yaffs_CheckChunkErased @@ -1930,6 +2826,8 @@ static void yaffs_BlockBecameDirty(yaffs_Device * dev, int blockNo) bi->pagesInUse = 0; bi->softDeletions = 0; bi->hasShrinkHeader = 0; + bi->skipErasedCheck = 1; /* This is clean, so no need to check */ + bi->gcPrioritise = 0; yaffs_ClearChunkBits(dev, blockNo); T(YAFFS_TRACE_ERASE, @@ -1954,7 +2852,7 @@ static int yaffs_FindBlockForAllocation(yaffs_Device * dev) * Can't get space to gc */ T(YAFFS_TRACE_ERROR, - (TSTR("yaffs tragedy: no more eraased blocks" TENDSTR))); + (TSTR("yaffs tragedy: no more erased blocks" TENDSTR))); return -1; } @@ -1985,7 +2883,7 @@ static int yaffs_FindBlockForAllocation(yaffs_Device * dev) T(YAFFS_TRACE_ALWAYS, (TSTR - ("yaffs tragedy: no more eraased blocks, but there should have been %d" + ("yaffs tragedy: no more erased blocks, but there should have been %d" TENDSTR), dev->nErasedBlocks)); return -1; @@ -1993,13 +2891,63 @@ static int yaffs_FindBlockForAllocation(yaffs_Device * dev) +static int yaffs_CalcCheckpointBlocksRequired(yaffs_Device *dev) +{ + if(!dev->nCheckpointBlocksRequired && + dev->isYaffs2){ + /* Not a valid value so recalculate */ + int nBytes = 0; + int nBlocks; + int devBlocks = (dev->endBlock - dev->startBlock + 1); + int tnodeSize; + + tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8; + + if(tnodeSize < sizeof(yaffs_Tnode)) + tnodeSize = sizeof(yaffs_Tnode); + + nBytes += sizeof(yaffs_CheckpointValidity); + nBytes += sizeof(yaffs_CheckpointDevice); + nBytes += devBlocks * sizeof(yaffs_BlockInfo); + nBytes += devBlocks * dev->chunkBitmapStride; + nBytes += (sizeof(yaffs_CheckpointObject) + sizeof(__u32)) * (dev->nObjectsCreated - dev->nFreeObjects); + nBytes += (tnodeSize + sizeof(__u32)) * (dev->nTnodesCreated - dev->nFreeTnodes); + nBytes += sizeof(yaffs_CheckpointValidity); + nBytes += sizeof(__u32); /* checksum*/ + + /* Round up and add 2 blocks to allow for some bad blocks, so add 3 */ + + nBlocks = (nBytes/(dev->nDataBytesPerChunk * dev->nChunksPerBlock)) + 3; + + dev->nCheckpointBlocksRequired = nBlocks; + } + + return dev->nCheckpointBlocksRequired; +} + +// Check if there's space to allocate... +// Thinks.... do we need top make this ths same as yaffs_GetFreeChunks()? static int yaffs_CheckSpaceForAllocation(yaffs_Device * dev) { - int reservedChunks = (dev->nReservedBlocks * dev->nChunksPerBlock); + int reservedChunks; + int reservedBlocks = dev->nReservedBlocks; + int checkpointBlocks; + + if(dev->isYaffs2){ + checkpointBlocks = yaffs_CalcCheckpointBlocksRequired(dev) - + dev->blocksInCheckpoint; + if(checkpointBlocks < 0) + checkpointBlocks = 0; + } else { + checkpointBlocks =0; + } + + reservedChunks = ((reservedBlocks + checkpointBlocks) * dev->nChunksPerBlock); + return (dev->nFreeChunks > reservedChunks); } -static int yaffs_AllocateChunk(yaffs_Device * dev, int useReserve) +static int yaffs_AllocateChunk(yaffs_Device * dev, int useReserve, yaffs_BlockInfo **blockUsedPtr) { int retVal; yaffs_BlockInfo *bi; @@ -2040,6 +2988,9 @@ static int yaffs_AllocateChunk(yaffs_Device * dev, int useReserve) dev->allocationBlock = -1; } + if(blockUsedPtr) + *blockUsedPtr = bi; + return retVal; } @@ -2063,15 +3014,17 @@ static int yaffs_GetErasedChunks(yaffs_Device * dev) } -static int yaffs_GarbageCollectBlock(yaffs_Device * dev, int block) +static int yaffs_GarbageCollectBlock(yaffs_Device * dev, int block, int wholeBlock) { int oldChunk; int newChunk; - int chunkInBlock; int markNAND; int retVal = YAFFS_OK; int cleanups = 0; int i; + int isCheckpointBlock; + int matchingChunk; + int maxCopies; int chunksBefore = yaffs_GetErasedChunks(dev); int chunksAfter; @@ -2082,11 +3035,16 @@ static int yaffs_GarbageCollectBlock(yaffs_Device * dev, int block) yaffs_Object *object; + isCheckpointBlock = (bi->blockState == YAFFS_BLOCK_STATE_CHECKPOINT); + bi->blockState = YAFFS_BLOCK_STATE_COLLECTING; T(YAFFS_TRACE_TRACING, - (TSTR("Collecting block %d, in use %d, shrink %d, " TENDSTR), block, - bi->pagesInUse, bi->hasShrinkHeader)); + (TSTR("Collecting block %d, in use %d, shrink %d, wholeBlock %d" TENDSTR), + block, + bi->pagesInUse, + bi->hasShrinkHeader, + wholeBlock)); /*yaffs_VerifyFreeChunks(dev); */ @@ -2099,7 +3057,8 @@ static int yaffs_GarbageCollectBlock(yaffs_Device * dev, int block) dev->isDoingGC = 1; - if (!yaffs_StillSomeChunkBits(dev, block)) { + if (isCheckpointBlock || + !yaffs_StillSomeChunkBits(dev, block)) { T(YAFFS_TRACE_TRACING, (TSTR ("Collecting block %d that has no chunks in use" TENDSTR), @@ -2108,14 +3067,23 @@ static int yaffs_GarbageCollectBlock(yaffs_Device * dev, int block) } else { __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__); + + yaffs_VerifyBlock(dev,bi,block); - for (chunkInBlock = 0, oldChunk = block * dev->nChunksPerBlock; - chunkInBlock < dev->nChunksPerBlock - && yaffs_StillSomeChunkBits(dev, block); - chunkInBlock++, oldChunk++) { - if (yaffs_CheckChunkBit(dev, block, chunkInBlock)) { + maxCopies = (wholeBlock) ? dev->nChunksPerBlock : 10; + oldChunk = block * dev->nChunksPerBlock + dev->gcChunk; + + for ( /* init already done */; + retVal == YAFFS_OK && + dev->gcChunk < dev->nChunksPerBlock && + (bi->blockState == YAFFS_BLOCK_STATE_COLLECTING)&& + maxCopies > 0; + dev->gcChunk++, oldChunk++) { + if (yaffs_CheckChunkBit(dev, block, dev->gcChunk)) { /* This page is in use and might need to be copied off */ + + maxCopies--; markNAND = 1; @@ -2130,20 +3098,38 @@ static int yaffs_GarbageCollectBlock(yaffs_Device * dev, int block) T(YAFFS_TRACE_GC_DETAIL, (TSTR - ("Collecting page %d, %d %d %d " TENDSTR), - chunkInBlock, tags.objectId, tags.chunkId, + ("Collecting chunk in block %d, %d %d %d " TENDSTR), + dev->gcChunk, tags.objectId, tags.chunkId, tags.byteCount)); + + if(object && !yaffs_SkipVerification(dev)){ + if(tags.chunkId == 0) + matchingChunk = object->hdrChunk; + else if(object->softDeleted) + matchingChunk = oldChunk; /* Defeat the test */ + else + matchingChunk = yaffs_FindChunkInFile(object,tags.chunkId,NULL); + + if(oldChunk != matchingChunk) + T(YAFFS_TRACE_ERROR, + (TSTR("gc: page in gc mismatch: %d %d %d %d"TENDSTR), + oldChunk,matchingChunk,tags.objectId, tags.chunkId)); + + } if (!object) { T(YAFFS_TRACE_ERROR, (TSTR - ("page %d in gc has no object " - TENDSTR), oldChunk)); + ("page %d in gc has no object: %d %d %d " + TENDSTR), oldChunk, + tags.objectId, tags.chunkId, tags.byteCount)); } - if (object && object->deleted - && tags.chunkId != 0) { - /* Data chunk in a deleted file, throw it away + if (object && + object->deleted && + object->softDeleted && + tags.chunkId != 0) { + /* Data chunk in a soft deleted file, throw it away * It's a soft deleted data chunk, * No need to copy this, just forget about it and * fix up the object. @@ -2164,7 +3150,7 @@ static int yaffs_GarbageCollectBlock(yaffs_Device * dev, int block) /* Deleted object header with no data chunks. * Can be discarded and the file deleted. */ - object->chunkId = 0; + object->hdrChunk = 0; yaffs_FreeTnode(object->myDev, object->variant. fileVariant.top); @@ -2186,15 +3172,14 @@ static int yaffs_GarbageCollectBlock(yaffs_Device * dev, int block) * We need to nuke the shrinkheader flags first * We no longer want the shrinkHeader flag since its work is done * and if it is left in place it will mess up scanning. - * Also, clear out any shadowing stuff */ yaffs_ObjectHeader *oh; oh = (yaffs_ObjectHeader *)buffer; oh->isShrink = 0; - oh->shadowsObject = -1; - tags.extraShadows = 0; tags.extraIsShrinkHeader = 0; + + yaffs_VerifyObjectHeader(object,oh,&tags,1); } newChunk = @@ -2208,7 +3193,7 @@ static int yaffs_GarbageCollectBlock(yaffs_Device * dev, int block) if (tags.chunkId == 0) { /* It's a header */ - object->chunkId = newChunk; + object->hdrChunk = newChunk; object->serial = tags.serialNumber; } else { /* It's a data chunk */ @@ -2220,7 +3205,8 @@ static int yaffs_GarbageCollectBlock(yaffs_Device * dev, int block) } } - yaffs_DeleteChunk(dev, oldChunk, markNAND, __LINE__); + if(retVal == YAFFS_OK) + yaffs_DeleteChunk(dev, oldChunk, markNAND, __LINE__); } } @@ -2244,12 +3230,15 @@ static int yaffs_GarbageCollectBlock(yaffs_Device * dev, int block) ("yaffs: About to finally delete object %d" TENDSTR), object->objectId)); yaffs_DoGenericObjectDeletion(object); + object->myDev->nDeletedFiles--; } } } + yaffs_VerifyCollectedBlock(dev,bi,block); + if (chunksBefore >= (chunksAfter = yaffs_GetErasedChunks(dev))) { T(YAFFS_TRACE_GC, (TSTR @@ -2257,9 +3246,15 @@ static int yaffs_GarbageCollectBlock(yaffs_Device * dev, int block) TENDSTR), chunksBefore, chunksAfter)); } + /* If the gc completed then clear the current gcBlock so that we find another. */ + if(bi->blockState != YAFFS_BLOCK_STATE_COLLECTING){ + dev->gcBlock = -1; + dev->gcChunk = 0; + } + dev->isDoingGC = 0; - return YAFFS_OK; + return retVal; } /* New garbage collector @@ -2277,6 +3272,8 @@ static int yaffs_CheckGarbageCollection(yaffs_Device * dev) int aggressive; int gcOk = YAFFS_OK; int maxTries = 0; + + int checkpointBlockAdjust; if (dev->isDoingGC) { /* Bail out so we don't get recursive gc */ @@ -2289,7 +3286,12 @@ static int yaffs_CheckGarbageCollection(yaffs_Device * dev) do { maxTries++; - if (dev->nErasedBlocks < dev->nReservedBlocks) { + + checkpointBlockAdjust = yaffs_CalcCheckpointBlocksRequired(dev) - dev->blocksInCheckpoint; + if(checkpointBlockAdjust < 0) + checkpointBlockAdjust = 0; + + if (dev->nErasedBlocks < (dev->nReservedBlocks + checkpointBlockAdjust + 2)) { /* We need a block soon...*/ aggressive = 1; } else { @@ -2297,7 +3299,12 @@ static int yaffs_CheckGarbageCollection(yaffs_Device * dev) aggressive = 0; } - block = yaffs_FindBlockForGarbageCollection(dev, aggressive); + if(dev->gcBlock <= 0){ + dev->gcBlock = yaffs_FindBlockForGarbageCollection(dev, aggressive); + dev->gcChunk = 0; + } + + block = dev->gcBlock; if (block > 0) { dev->garbageCollections++; @@ -2310,7 +3317,7 @@ static int yaffs_CheckGarbageCollection(yaffs_Device * dev) ("yaffs: GC erasedBlocks %d aggressive %d" TENDSTR), dev->nErasedBlocks, aggressive)); - gcOk = yaffs_GarbageCollectBlock(dev, block); + gcOk = yaffs_GarbageCollectBlock(dev,block,aggressive); } if (dev->nErasedBlocks < (dev->nReservedBlocks) && block > 0) { @@ -2319,8 +3326,9 @@ static int yaffs_CheckGarbageCollection(yaffs_Device * dev) ("yaffs: GC !!!no reclaim!!! erasedBlocks %d after try %d block %d" TENDSTR), dev->nErasedBlocks, maxTries, block)); } - } while ((dev->nErasedBlocks < dev->nReservedBlocks) && (block > 0) - && (maxTries < 2)); + } while ((dev->nErasedBlocks < dev->nReservedBlocks) && + (block > 0) && + (maxTries < 2)); return aggressive ? gcOk : YAFFS_OK; } @@ -2357,9 +3365,7 @@ static int yaffs_FindChunkInFile(yaffs_Object * in, int chunkInInode, tn = yaffs_FindLevel0Tnode(dev, &in->variant.fileVariant, chunkInInode); if (tn) { - theChunk = - tn->level0[chunkInInode & YAFFS_TNODES_LEVEL0_MASK] << - dev->chunkGroupBits; + theChunk = yaffs_GetChunkGroupBase(dev,tn,chunkInInode); retVal = yaffs_FindChunkInGroup(dev, theChunk, tags, in->objectId, @@ -2388,9 +3394,7 @@ static int yaffs_FindAndDeleteChunkInFile(yaffs_Object * in, int chunkInInode, if (tn) { - theChunk = - tn->level0[chunkInInode & YAFFS_TNODES_LEVEL0_MASK] << dev-> - chunkGroupBits; + theChunk = yaffs_GetChunkGroupBase(dev,tn,chunkInInode); retVal = yaffs_FindChunkInGroup(dev, theChunk, tags, in->objectId, @@ -2398,7 +3402,7 @@ static int yaffs_FindAndDeleteChunkInFile(yaffs_Object * in, int chunkInInode, /* Delete the entry in the filestructure (if found) */ if (retVal != -1) { - tn->level0[chunkInInode & YAFFS_TNODES_LEVEL0_MASK] = 0; + yaffs_PutLevel0Tnode(dev,tn,chunkInInode,0); } } else { /*T(("No level 0 found for %d\n", chunkInInode)); */ @@ -2433,7 +3437,7 @@ static int yaffs_CheckFileSanity(yaffs_Object * in) objId = in->objectId; fSize = in->variant.fileVariant.fileSize; nChunks = - (fSize + in->myDev->nBytesPerChunk - 1) / in->myDev->nBytesPerChunk; + (fSize + in->myDev->nDataBytesPerChunk - 1) / in->myDev->nDataBytesPerChunk; for (chunk = 1; chunk <= nChunks; chunk++) { tn = yaffs_FindLevel0Tnode(in->myDev, &in->variant.fileVariant, @@ -2441,9 +3445,7 @@ static int yaffs_CheckFileSanity(yaffs_Object * in) if (tn) { - theChunk = - tn->level0[chunk & YAFFS_TNODES_LEVEL0_MASK] << in-> - myDev->chunkGroupBits; + theChunk = yaffs_GetChunkGroupBase(dev,tn,chunk); if (yaffs_CheckChunkBits (dev, theChunk / dev->nChunksPerBlock, @@ -2503,13 +3505,15 @@ static int yaffs_PutChunkIntoFile(yaffs_Object * in, int chunkInInode, return YAFFS_OK; } - tn = yaffs_AddOrFindLevel0Tnode(dev, &in->variant.fileVariant, - chunkInInode); + tn = yaffs_AddOrFindLevel0Tnode(dev, + &in->variant.fileVariant, + chunkInInode, + NULL); if (!tn) { return YAFFS_FAIL; } - existingChunk = tn->level0[chunkInInode & YAFFS_TNODES_LEVEL0_MASK]; + existingChunk = yaffs_GetChunkGroupBase(dev,tn,chunkInInode); if (inScan != 0) { /* If we're scanning then we need to test for duplicates @@ -2521,7 +3525,7 @@ static int yaffs_PutChunkIntoFile(yaffs_Object * in, int chunkInInode, * Update: For backward scanning we don't need to re-read tags so this is quite cheap. */ - if (existingChunk != 0) { + if (existingChunk > 0) { /* 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. * @@ -2558,8 +3562,10 @@ static int yaffs_PutChunkIntoFile(yaffs_Object * in, int chunkInInode, * not be loaded during a scan */ - newSerial = newTags.serialNumber; - existingSerial = existingTags.serialNumber; + if(inScan > 0) { + newSerial = newTags.serialNumber; + existingSerial = existingTags.serialNumber; + } if ((inScan > 0) && (in->myDev->isYaffs2 || @@ -2588,8 +3594,7 @@ static int yaffs_PutChunkIntoFile(yaffs_Object * in, int chunkInInode, in->nDataChunks++; } - tn->level0[chunkInInode & YAFFS_TNODES_LEVEL0_MASK] = - (chunkInNAND >> dev->chunkGroupBits); + yaffs_PutLevel0Tnode(dev,tn,chunkInInode,chunkInNAND); return YAFFS_OK; } @@ -2601,519 +3606,1142 @@ static int yaffs_ReadChunkDataFromObject(yaffs_Object * in, int chunkInInode, if (chunkInNAND >= 0) { return yaffs_ReadChunkWithTagsFromNAND(in->myDev, chunkInNAND, - buffer, NULL); + buffer,NULL); } else { T(YAFFS_TRACE_NANDACCESS, (TSTR("Chunk %d not found zero instead" TENDSTR), chunkInNAND)); /* get sane (zero) data if you read a hole */ - memset(buffer, 0, in->myDev->nBytesPerChunk); + memset(buffer, 0, in->myDev->nDataBytesPerChunk); return 0; } - + +} + +void yaffs_DeleteChunk(yaffs_Device * dev, int chunkId, int markNAND, int lyn) +{ + int block; + int page; + yaffs_ExtendedTags tags; + yaffs_BlockInfo *bi; + + if (chunkId <= 0) + return; + + + dev->nDeletions++; + block = chunkId / dev->nChunksPerBlock; + page = chunkId % dev->nChunksPerBlock; + + + if(!yaffs_CheckChunkBit(dev,block,page)) + T(YAFFS_TRACE_VERIFY, + (TSTR("Deleting invalid chunk %d"TENDSTR), + chunkId)); + + bi = yaffs_GetBlockInfo(dev, block); + + T(YAFFS_TRACE_DELETION, + (TSTR("line %d delete of chunk %d" TENDSTR), lyn, chunkId)); + + if (markNAND && + bi->blockState != YAFFS_BLOCK_STATE_COLLECTING && !dev->isYaffs2) { + + yaffs_InitialiseTags(&tags); + + tags.chunkDeleted = 1; + + yaffs_WriteChunkWithTagsToNAND(dev, chunkId, NULL, &tags); + yaffs_HandleUpdateChunk(dev, chunkId, &tags); + } else { + dev->nUnmarkedDeletions++; + } + + /* Pull out of the management area. + * If the whole block became dirty, this will kick off an erasure. + */ + if (bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING || + bi->blockState == YAFFS_BLOCK_STATE_FULL || + bi->blockState == YAFFS_BLOCK_STATE_NEEDS_SCANNING || + bi->blockState == YAFFS_BLOCK_STATE_COLLECTING) { + dev->nFreeChunks++; + + yaffs_ClearChunkBit(dev, block, page); + + bi->pagesInUse--; + + if (bi->pagesInUse == 0 && + !bi->hasShrinkHeader && + bi->blockState != YAFFS_BLOCK_STATE_ALLOCATING && + bi->blockState != YAFFS_BLOCK_STATE_NEEDS_SCANNING) { + yaffs_BlockBecameDirty(dev, block); + } + + } else { + /* T(("Bad news deleting chunk %d\n",chunkId)); */ + } + +} + +static int yaffs_WriteChunkDataToObject(yaffs_Object * in, int chunkInInode, + const __u8 * buffer, int nBytes, + int useReserve) +{ + /* Find old chunk Need to do this to get serial number + * Write new one and patch into tree. + * Invalidate old tags. + */ + + int prevChunkId; + yaffs_ExtendedTags prevTags; + + int newChunkId; + yaffs_ExtendedTags newTags; + + yaffs_Device *dev = in->myDev; + + yaffs_CheckGarbageCollection(dev); + + /* Get the previous chunk at this location in the file if it exists */ + prevChunkId = yaffs_FindChunkInFile(in, chunkInInode, &prevTags); + + /* Set up new tags */ + yaffs_InitialiseTags(&newTags); + + newTags.chunkId = chunkInInode; + newTags.objectId = in->objectId; + newTags.serialNumber = + (prevChunkId >= 0) ? prevTags.serialNumber + 1 : 1; + newTags.byteCount = nBytes; + + if(nBytes < 1 || nBytes > dev->totalBytesPerChunk){ + T(YAFFS_TRACE_ERROR, + (TSTR("Writing %d bytes to chunk!!!!!!!!!" TENDSTR), nBytes)); + YBUG(); + } + + + + newChunkId = + yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &newTags, + useReserve); + + if (newChunkId >= 0) { + yaffs_PutChunkIntoFile(in, chunkInInode, newChunkId, 0); + + if (prevChunkId >= 0) { + yaffs_DeleteChunk(dev, prevChunkId, 1, __LINE__); + + } + + yaffs_CheckFileSanity(in); + } + return newChunkId; + +} + +/* UpdateObjectHeader updates the header on NAND for an object. + * If name is not NULL, then that new name is used. + */ +int yaffs_UpdateObjectHeader(yaffs_Object * in, const YCHAR * name, int force, + int isShrink, int shadows) +{ + + yaffs_BlockInfo *bi; + + yaffs_Device *dev = in->myDev; + + int prevChunkId; + int retVal = 0; + int result = 0; + + int newChunkId; + yaffs_ExtendedTags newTags; + yaffs_ExtendedTags oldTags; + + __u8 *buffer = NULL; + YCHAR oldName[YAFFS_MAX_NAME_LENGTH + 1]; + + yaffs_ObjectHeader *oh = NULL; + + yaffs_strcpy(oldName,_Y("silly old name")); + + + if (!in->fake || + in == dev->rootDir || /* The rootDir should also be saved */ + force) { + + yaffs_CheckGarbageCollection(dev); + yaffs_CheckObjectDetailsLoaded(in); + + buffer = yaffs_GetTempBuffer(in->myDev, __LINE__); + oh = (yaffs_ObjectHeader *) buffer; + + prevChunkId = in->hdrChunk; + + if (prevChunkId > 0) { + result = yaffs_ReadChunkWithTagsFromNAND(dev, prevChunkId, + buffer, &oldTags); + + yaffs_VerifyObjectHeader(in,oh,&oldTags,0); + + memcpy(oldName, oh->name, sizeof(oh->name)); + } + + memset(buffer, 0xFF, dev->nDataBytesPerChunk); + + oh->type = in->variantType; + oh->yst_mode = in->yst_mode; + oh->shadowsObject = oh->inbandShadowsObject = shadows; + +#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; + } else { + oh->parentObjectId = 0; + } + + if (name && *name) { + memset(oh->name, 0, sizeof(oh->name)); + yaffs_strncpy(oh->name, name, YAFFS_MAX_NAME_LENGTH); + } else if (prevChunkId>=0) { + memcpy(oh->name, oldName, sizeof(oh->name)); + } else { + memset(oh->name, 0, sizeof(oh->name)); + } + + oh->isShrink = isShrink; + + switch (in->variantType) { + case YAFFS_OBJECT_TYPE_UNKNOWN: + /* Should not happen */ + break; + case YAFFS_OBJECT_TYPE_FILE: + 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; + break; + case YAFFS_OBJECT_TYPE_SPECIAL: + /* Do nothing */ + break; + case YAFFS_OBJECT_TYPE_DIRECTORY: + /* Do nothing */ + break; + case YAFFS_OBJECT_TYPE_SYMLINK: + yaffs_strncpy(oh->alias, + in->variant.symLinkVariant.alias, + YAFFS_MAX_ALIAS_LENGTH); + oh->alias[YAFFS_MAX_ALIAS_LENGTH] = 0; + break; + } + + /* Tags */ + yaffs_InitialiseTags(&newTags); + in->serial++; + 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.extraShadows = (oh->shadowsObject > 0) ? 1 : 0; + newTags.extraObjectType = in->variantType; + + yaffs_VerifyObjectHeader(in,oh,&newTags,1); + + /* Create new chunk in NAND */ + newChunkId = + yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &newTags, + (prevChunkId >= 0) ? 1 : 0); + + if (newChunkId >= 0) { + + in->hdrChunk = newChunkId; + + if (prevChunkId >= 0) { + yaffs_DeleteChunk(dev, prevChunkId, 1, + __LINE__); + } + + if(!yaffs_ObjectHasCachedWriteData(in)) + in->dirty = 0; + + /* If this was a shrink, then mark the block that the chunk lives on */ + if (isShrink) { + bi = yaffs_GetBlockInfo(in->myDev, + newChunkId /in->myDev-> nChunksPerBlock); + bi->hasShrinkHeader = 1; + } + + } + + retVal = newChunkId; + + } + + if (buffer) + yaffs_ReleaseTempBuffer(dev, buffer, __LINE__); + + return retVal; +} + +/*------------------------ Short Operations Cache ---------------------------------------- + * In many situations 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. + * In Linux, the page cache provides read buffering aand the short op cache provides write + * buffering. + * + * There are a limited number (~10) of cache chunks per device so that we don't + * need a very intelligent search. + */ + +static int yaffs_ObjectHasCachedWriteData(yaffs_Object *obj) +{ + yaffs_Device *dev = obj->myDev; + int i; + yaffs_ChunkCache *cache; + int nCaches = obj->myDev->nShortOpCaches; + + for(i = 0; i < nCaches; i++){ + cache = &dev->srCache[i]; + if (cache->object == obj && + cache->dirty) + return 1; + } + + return 0; } -void yaffs_DeleteChunk(yaffs_Device * dev, int chunkId, int markNAND, int lyn) -{ - int block; - int page; - yaffs_ExtendedTags tags; - yaffs_BlockInfo *bi; - if (chunkId <= 0) - return; +static void yaffs_FlushFilesChunkCache(yaffs_Object * obj) +{ + yaffs_Device *dev = obj->myDev; + int lowest = -99; /* Stop compiler whining. */ + int i; + yaffs_ChunkCache *cache; + int chunkWritten = 0; + int nCaches = obj->myDev->nShortOpCaches; - dev->nDeletions++; - block = chunkId / dev->nChunksPerBlock; - page = chunkId % dev->nChunksPerBlock; + if (nCaches > 0) { + do { + cache = NULL; - bi = yaffs_GetBlockInfo(dev, block); + /* 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; + } + } + } - T(YAFFS_TRACE_DELETION, - (TSTR("line %d delete of chunk %d" TENDSTR), lyn, chunkId)); + if (cache && !cache->locked) { + /* Write it out and free it up */ - if (markNAND && - bi->blockState != YAFFS_BLOCK_STATE_COLLECTING && !dev->isYaffs2) { + chunkWritten = + yaffs_WriteChunkDataToObject(cache->object, + cache->chunkId, + cache->data, + cache->nBytes, + 1); + cache->dirty = 0; + cache->object = NULL; + } -#ifdef CONFIG_MTD_NAND_VERIFY_WRITE + } while (cache && chunkWritten > 0); - /* Read data before write, to ensure correct ecc - * if we're using MTD verification under Linux - */ - yaffs_ReadChunkFromNAND(dev, chunkId, NULL, &spare, 0); -#endif + if (cache) { + /* Hoosterman, disk full while writing cache out. */ + T(YAFFS_TRACE_ERROR, + (TSTR("yaffs tragedy: no space during cache write" TENDSTR))); - yaffs_InitialiseTags(&tags); + } + } - tags.chunkDeleted = 1; +} - yaffs_WriteChunkWithTagsToNAND(dev, chunkId, NULL, &tags); - yaffs_HandleUpdateChunk(dev, chunkId, &tags); - } else { - dev->nUnmarkedDeletions++; - } +/*yaffs_FlushEntireDeviceCache(dev) + * + * + */ - /* Pull out of the management area. - * If the whole block became dirty, this will kick off an erasure. +void yaffs_FlushEntireDeviceCache(yaffs_Device *dev) +{ + yaffs_Object *obj; + int nCaches = dev->nShortOpCaches; + int i; + + /* Find a dirty object in the cache and flush it... + * until there are no further dirty objects. */ - if (bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING || - bi->blockState == YAFFS_BLOCK_STATE_FULL || - bi->blockState == YAFFS_BLOCK_STATE_NEEDS_SCANNING || - bi->blockState == YAFFS_BLOCK_STATE_COLLECTING) { - dev->nFreeChunks++; + do { + obj = NULL; + for( i = 0; i < nCaches && !obj; i++) { + if (dev->srCache[i].object && + dev->srCache[i].dirty) + obj = dev->srCache[i].object; + + } + if(obj) + yaffs_FlushFilesChunkCache(obj); + + } while(obj); + +} - yaffs_ClearChunkBit(dev, block, page); - bi->pagesInUse--; +/* Grab us a cache chunk for use. + * First look for an empty one. + * 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; - if (bi->pagesInUse == 0 && - !bi->hasShrinkHeader && - bi->blockState != YAFFS_BLOCK_STATE_ALLOCATING && - bi->blockState != YAFFS_BLOCK_STATE_NEEDS_SCANNING) { - yaffs_BlockBecameDirty(dev, block); + if (dev->nShortOpCaches > 0) { + for (i = 0; i < dev->nShortOpCaches; i++) { + if (!dev->srCache[i].object) + return &dev->srCache[i]; } - - } else { - /* T(("Bad news deleting chunk %d\n",chunkId)); */ } + return NULL; } -static int yaffs_WriteChunkDataToObject(yaffs_Object * in, int chunkInInode, - const __u8 * buffer, int nBytes, - int useReserve) +static yaffs_ChunkCache *yaffs_GrabChunkCache(yaffs_Device * dev) { - /* Find old chunk Need to do this to get serial number - * Write new one and patch into tree. - * Invalidate old tags. - */ + yaffs_ChunkCache *cache; + yaffs_Object *theObj; + int usage; + int i; + int pushout; - int prevChunkId; - yaffs_ExtendedTags prevTags; + if (dev->nShortOpCaches > 0) { + /* Try find a non-dirty one... */ - int newChunkId; - yaffs_ExtendedTags newTags; + cache = yaffs_GrabChunkCacheWorker(dev); - yaffs_Device *dev = in->myDev; + 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. + */ - yaffs_CheckGarbageCollection(dev); + /* With locking we can't assume we can use entry zero */ - /* Get the previous chunk at this location in the file if it exists */ - prevChunkId = yaffs_FindChunkInFile(in, chunkInInode, &prevTags); + theObj = NULL; + usage = -1; + cache = NULL; + pushout = -1; - /* Set up new tags */ - yaffs_InitialiseTags(&newTags); + for (i = 0; i < dev->nShortOpCaches; i++) { + if (dev->srCache[i].object && + !dev->srCache[i].locked && + (dev->srCache[i].lastUse < usage || !cache)) + { + usage = dev->srCache[i].lastUse; + theObj = dev->srCache[i].object; + cache = &dev->srCache[i]; + pushout = i; + } + } - newTags.chunkId = chunkInInode; - newTags.objectId = in->objectId; - newTags.serialNumber = - (prevChunkId >= 0) ? prevTags.serialNumber + 1 : 1; - newTags.byteCount = nBytes; + if (!cache || cache->dirty) { + /* Flush and try again */ + yaffs_FlushFilesChunkCache(theObj); + cache = yaffs_GrabChunkCacheWorker(dev); + } - newChunkId = - yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &newTags, - useReserve); + } + return cache; + } else + return NULL; - if (newChunkId >= 0) { - yaffs_PutChunkIntoFile(in, chunkInInode, newChunkId, 0); +} - if (prevChunkId >= 0) { - yaffs_DeleteChunk(dev, prevChunkId, 1, __LINE__); +/* Find a cached chunk */ +static yaffs_ChunkCache *yaffs_FindChunkCache(const yaffs_Object * obj, + int chunkId) +{ + yaffs_Device *dev = obj->myDev; + int i; + if (dev->nShortOpCaches > 0) { + for (i = 0; i < dev->nShortOpCaches; i++) { + if (dev->srCache[i].object == obj && + dev->srCache[i].chunkId == chunkId) { + dev->cacheHits++; + return &dev->srCache[i]; + } } - - yaffs_CheckFileSanity(in); } - return newChunkId; - + return NULL; } -/* UpdateObjectHeader updates the header on NAND for an object. - * If name is not NULL, then that new name is used. - */ -int yaffs_UpdateObjectHeader(yaffs_Object * in, const YCHAR * name, int force, - int isShrink, int shadows) +/* Mark the chunk for the least recently used algorithym */ +static void yaffs_UseChunkCache(yaffs_Device * dev, yaffs_ChunkCache * cache, + int isAWrite) { - yaffs_BlockInfo *bi; - - yaffs_Device *dev = in->myDev; - - int prevChunkId; - int retVal = 0; - - int newChunkId; - yaffs_ExtendedTags newTags; + if (dev->nShortOpCaches > 0) { + if (dev->srLastUse < 0 || dev->srLastUse > 100000000) { + /* Reset the cache usages */ + int i; + for (i = 1; i < dev->nShortOpCaches; i++) { + dev->srCache[i].lastUse = 0; + } + dev->srLastUse = 0; + } - __u8 *buffer = NULL; - YCHAR oldName[YAFFS_MAX_NAME_LENGTH + 1]; + dev->srLastUse++; - yaffs_ObjectHeader *oh = NULL; + cache->lastUse = dev->srLastUse; - if (!in->fake || force) { + if (isAWrite) { + cache->dirty = 1; + } + } +} - yaffs_CheckGarbageCollection(dev); +/* 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); - buffer = yaffs_GetTempBuffer(in->myDev, __LINE__); - oh = (yaffs_ObjectHeader *) buffer; + if (cache) { + cache->object = NULL; + } + } +} - prevChunkId = in->chunkId; +/* 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 (prevChunkId >= 0) { - yaffs_ReadChunkWithTagsFromNAND(dev, prevChunkId, - buffer, NULL); - memcpy(oldName, oh->name, sizeof(oh->name)); + if (dev->nShortOpCaches > 0) { + /* Invalidate it. */ + for (i = 0; i < dev->nShortOpCaches; i++) { + if (dev->srCache[i].object == in) { + dev->srCache[i].object = NULL; + } } + } +} - memset(buffer, 0xFF, dev->nBytesPerChunk); - - oh->type = in->variantType; - oh->yst_mode = in->yst_mode; - oh->shadowsObject = shadows; +/*--------------------- Checkpointing --------------------*/ -#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; - } else { - oh->parentObjectId = 0; - } - if (name && *name) { - memset(oh->name, 0, sizeof(oh->name)); - yaffs_strncpy(oh->name, name, YAFFS_MAX_NAME_LENGTH); - } else if (prevChunkId) { - memcpy(oh->name, oldName, sizeof(oh->name)); - } else { - memset(oh->name, 0, sizeof(oh->name)); - } +static int yaffs_WriteCheckpointValidityMarker(yaffs_Device *dev,int head) +{ + yaffs_CheckpointValidity cp; + + memset(&cp,0,sizeof(cp)); + + cp.structType = sizeof(cp); + cp.magic = YAFFS_MAGIC; + cp.version = YAFFS_CHECKPOINT_VERSION; + cp.head = (head) ? 1 : 0; + + return (yaffs_CheckpointWrite(dev,&cp,sizeof(cp)) == sizeof(cp))? + 1 : 0; +} - oh->isShrink = isShrink; +static int yaffs_ReadCheckpointValidityMarker(yaffs_Device *dev, int head) +{ + yaffs_CheckpointValidity cp; + int ok; + + ok = (yaffs_CheckpointRead(dev,&cp,sizeof(cp)) == sizeof(cp)); + + if(ok) + ok = (cp.structType == sizeof(cp)) && + (cp.magic == YAFFS_MAGIC) && + (cp.version == YAFFS_CHECKPOINT_VERSION) && + (cp.head == ((head) ? 1 : 0)); + return ok ? 1 : 0; +} - switch (in->variantType) { - case YAFFS_OBJECT_TYPE_UNKNOWN: - /* Should not happen */ - break; - case YAFFS_OBJECT_TYPE_FILE: - 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; - break; - case YAFFS_OBJECT_TYPE_SPECIAL: - /* Do nothing */ - break; - case YAFFS_OBJECT_TYPE_DIRECTORY: - /* Do nothing */ - break; - case YAFFS_OBJECT_TYPE_SYMLINK: - yaffs_strncpy(oh->alias, - in->variant.symLinkVariant.alias, - YAFFS_MAX_ALIAS_LENGTH); - oh->alias[YAFFS_MAX_ALIAS_LENGTH] = 0; - break; - } +static void yaffs_DeviceToCheckpointDevice(yaffs_CheckpointDevice *cp, + yaffs_Device *dev) +{ + cp->nErasedBlocks = dev->nErasedBlocks; + cp->allocationBlock = dev->allocationBlock; + cp->allocationPage = dev->allocationPage; + cp->nFreeChunks = dev->nFreeChunks; + + cp->nDeletedFiles = dev->nDeletedFiles; + cp->nUnlinkedFiles = dev->nUnlinkedFiles; + cp->nBackgroundDeletions = dev->nBackgroundDeletions; + cp->sequenceNumber = dev->sequenceNumber; + cp->oldestDirtySequence = dev->oldestDirtySequence; + +} - /* Tags */ - yaffs_InitialiseTags(&newTags); - in->serial++; - newTags.chunkId = 0; - newTags.objectId = in->objectId; - newTags.serialNumber = in->serial; +static void yaffs_CheckpointDeviceToDevice(yaffs_Device *dev, + yaffs_CheckpointDevice *cp) +{ + dev->nErasedBlocks = cp->nErasedBlocks; + dev->allocationBlock = cp->allocationBlock; + dev->allocationPage = cp->allocationPage; + dev->nFreeChunks = cp->nFreeChunks; + + dev->nDeletedFiles = cp->nDeletedFiles; + dev->nUnlinkedFiles = cp->nUnlinkedFiles; + dev->nBackgroundDeletions = cp->nBackgroundDeletions; + dev->sequenceNumber = cp->sequenceNumber; + dev->oldestDirtySequence = cp->oldestDirtySequence; +} - /* 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.extraShadows = (oh->shadowsObject > 0) ? 1 : 0; - newTags.extraObjectType = in->variantType; +static int yaffs_WriteCheckpointDevice(yaffs_Device *dev) +{ + yaffs_CheckpointDevice cp; + __u32 nBytes; + __u32 nBlocks = (dev->internalEndBlock - dev->internalStartBlock + 1); - /* Create new chunk in NAND */ - newChunkId = - yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &newTags, - (prevChunkId >= 0) ? 1 : 0); + int ok; + + /* Write device runtime values*/ + yaffs_DeviceToCheckpointDevice(&cp,dev); + cp.structType = sizeof(cp); + + ok = (yaffs_CheckpointWrite(dev,&cp,sizeof(cp)) == sizeof(cp)); + + /* Write block info */ + if(ok) { + nBytes = nBlocks * sizeof(yaffs_BlockInfo); + ok = (yaffs_CheckpointWrite(dev,dev->blockInfo,nBytes) == nBytes); + } + + /* Write chunk bits */ + if(ok) { + nBytes = nBlocks * dev->chunkBitmapStride; + ok = (yaffs_CheckpointWrite(dev,dev->chunkBits,nBytes) == nBytes); + } + return ok ? 1 : 0; - if (newChunkId >= 0) { +} - in->chunkId = newChunkId; +static int yaffs_ReadCheckpointDevice(yaffs_Device *dev) +{ + yaffs_CheckpointDevice cp; + __u32 nBytes; + __u32 nBlocks = (dev->internalEndBlock - dev->internalStartBlock + 1); - if (prevChunkId >= 0) { - yaffs_DeleteChunk(dev, prevChunkId, 1, - __LINE__); - } + int ok; + + ok = (yaffs_CheckpointRead(dev,&cp,sizeof(cp)) == sizeof(cp)); + if(!ok) + return 0; + + if(cp.structType != sizeof(cp)) + return 0; + + + yaffs_CheckpointDeviceToDevice(dev,&cp); + + nBytes = nBlocks * sizeof(yaffs_BlockInfo); + + ok = (yaffs_CheckpointRead(dev,dev->blockInfo,nBytes) == nBytes); + + if(!ok) + return 0; + nBytes = nBlocks * dev->chunkBitmapStride; + + ok = (yaffs_CheckpointRead(dev,dev->chunkBits,nBytes) == nBytes); + + return ok ? 1 : 0; +} - in->dirty = 0; +static void yaffs_ObjectToCheckpointObject(yaffs_CheckpointObject *cp, + yaffs_Object *obj) +{ - /* If this was a shrink, then mark the block that the chunk lives on */ - if (isShrink) { - bi = yaffs_GetBlockInfo(in->myDev, - newChunkId /in->myDev-> nChunksPerBlock); - bi->hasShrinkHeader = 1; - } + cp->objectId = obj->objectId; + cp->parentId = (obj->parent) ? obj->parent->objectId : 0; + cp->hdrChunk = obj->hdrChunk; + cp->variantType = obj->variantType; + cp->deleted = obj->deleted; + cp->softDeleted = obj->softDeleted; + cp->unlinked = obj->unlinked; + cp->fake = obj->fake; + cp->renameAllowed = obj->renameAllowed; + cp->unlinkAllowed = obj->unlinkAllowed; + cp->serial = obj->serial; + cp->nDataChunks = obj->nDataChunks; + + if(obj->variantType == YAFFS_OBJECT_TYPE_FILE) + cp->fileSizeOrEquivalentObjectId = obj->variant.fileVariant.fileSize; + else if(obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) + cp->fileSizeOrEquivalentObjectId = obj->variant.hardLinkVariant.equivalentObjectId; +} - } +static int yaffs_CheckpointObjectToObject( yaffs_Object *obj,yaffs_CheckpointObject *cp) +{ - retVal = newChunkId; + yaffs_Object *parent; + if (obj->variantType != cp->variantType) { + T(YAFFS_TRACE_ERROR,(TSTR("Checkpoint read object %d type %d " + TCONT("chunk %d does not match existing object type %d") + TENDSTR), cp->objectId, cp->variantType, cp->hdrChunk, + obj->variantType)); + return 0; } + + obj->objectId = cp->objectId; + + if(cp->parentId) + parent = yaffs_FindOrCreateObjectByNumber( + obj->myDev, + cp->parentId, + YAFFS_OBJECT_TYPE_DIRECTORY); + else + parent = NULL; + + if(parent) { + if (parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) { + T(YAFFS_TRACE_ALWAYS,(TSTR("Checkpoint read object %d parent %d type %d" + TCONT(" chunk %d Parent type, %d, not directory") + TENDSTR), + cp->objectId,cp->parentId,cp->variantType,cp->hdrChunk,parent->variantType)); + return 0; + } + yaffs_AddObjectToDirectory(parent, obj); + } + + obj->hdrChunk = cp->hdrChunk; + obj->variantType = cp->variantType; + obj->deleted = cp->deleted; + obj->softDeleted = cp->softDeleted; + obj->unlinked = cp->unlinked; + obj->fake = cp->fake; + obj->renameAllowed = cp->renameAllowed; + obj->unlinkAllowed = cp->unlinkAllowed; + obj->serial = cp->serial; + obj->nDataChunks = cp->nDataChunks; + + if(obj->variantType == YAFFS_OBJECT_TYPE_FILE) + obj->variant.fileVariant.fileSize = cp->fileSizeOrEquivalentObjectId; + else if(obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) + obj->variant.hardLinkVariant.equivalentObjectId = cp->fileSizeOrEquivalentObjectId; - if (buffer) - yaffs_ReleaseTempBuffer(dev, buffer, __LINE__); - - return retVal; + if(obj->hdrChunk > 0) + obj->lazyLoaded = 1; + return 1; } -/*------------------------ Short Operations Cache ---------------------------------------- - * In many situations 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. - * In Linux, the page cache provides read buffering aand the short op cache provides write - * buffering. - * - * There are a limited number (~10) of cache chunks per device so that we don't - * need a very intelligent search. - */ -static void yaffs_FlushFilesChunkCache(yaffs_Object * obj) + +static int yaffs_CheckpointTnodeWorker(yaffs_Object * in, yaffs_Tnode * tn, + __u32 level, int chunkOffset) { - yaffs_Device *dev = obj->myDev; - int lowest = -99; /* Stop compiler whining. */ int i; - yaffs_ChunkCache *cache; - int chunkWritten = 0; - int nCaches = obj->myDev->nShortOpCaches; + yaffs_Device *dev = in->myDev; + int ok = 1; + int tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8; - if (nCaches > 0) { - do { - cache = NULL; + if(tnodeSize < sizeof(yaffs_Tnode)) + tnodeSize = sizeof(yaffs_Tnode); + - /* 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 (tn) { + if (level > 0) { + + for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++){ + if (tn->internal[i]) { + ok = yaffs_CheckpointTnodeWorker(in, + tn->internal[i], + level - 1, + (chunkOffset<locked) { - /* Write it out and free it up */ + return ok; - chunkWritten = - yaffs_WriteChunkDataToObject(cache->object, - cache->chunkId, - cache->data, - cache->nBytes, - 1); - cache->dirty = 0; - cache->object = NULL; - } +} - } while (cache && chunkWritten > 0); +static int yaffs_WriteCheckpointTnodes(yaffs_Object *obj) +{ + __u32 endMarker = ~0; + int ok = 1; + + if(obj->variantType == YAFFS_OBJECT_TYPE_FILE){ + ok = yaffs_CheckpointTnodeWorker(obj, + obj->variant.fileVariant.top, + obj->variant.fileVariant.topLevel, + 0); + if(ok) + ok = (yaffs_CheckpointWrite(obj->myDev,&endMarker,sizeof(endMarker)) == + sizeof(endMarker)); + } + + return ok ? 1 : 0; +} - if (cache) { - /* Hoosterman, disk full while writing cache out. */ - T(YAFFS_TRACE_ERROR, - (TSTR("yaffs tragedy: no space during cache write" TENDSTR))); +static int yaffs_ReadCheckpointTnodes(yaffs_Object *obj) +{ + __u32 baseChunk; + int ok = 1; + yaffs_Device *dev = obj->myDev; + yaffs_FileStructure *fileStructPtr = &obj->variant.fileVariant; + yaffs_Tnode *tn; + int nread = 0; + int tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8; + + if(tnodeSize < sizeof(yaffs_Tnode)) + tnodeSize = sizeof(yaffs_Tnode); + ok = (yaffs_CheckpointRead(dev,&baseChunk,sizeof(baseChunk)) == sizeof(baseChunk)); + + while(ok && (~baseChunk)){ + nread++; + /* Read level 0 tnode */ + + + tn = yaffs_GetTnodeRaw(dev); + if(tn) + ok = (yaffs_CheckpointRead(dev,tn,tnodeSize) == tnodeSize); + else + ok = 0; + + if(tn && ok){ + ok = yaffs_AddOrFindLevel0Tnode(dev, + fileStructPtr, + baseChunk, + tn) ? 1 : 0; + } + + if(ok) + ok = (yaffs_CheckpointRead(dev,&baseChunk,sizeof(baseChunk)) == sizeof(baseChunk)); + } + T(YAFFS_TRACE_CHECKPOINT,( + TSTR("Checkpoint read tnodes %d records, last %d. ok %d" TENDSTR), + nread,baseChunk,ok)); + + return ok ? 1 : 0; } + -/* Grab us a cache chunk for use. - * First look for an empty one. - * 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) +static int yaffs_WriteCheckpointObjects(yaffs_Device *dev) { - int i; - int usage; - int theOne; - - if (dev->nShortOpCaches > 0) { - for (i = 0; i < dev->nShortOpCaches; i++) { - if (!dev->srCache[i].object) - return &dev->srCache[i]; + yaffs_Object *obj; + yaffs_CheckpointObject cp; + int i; + int ok = 1; + struct ylist_head *lh; + + + /* Iterate through the objects in each hash entry, + * dumping them to the checkpointing stream. + */ + + for(i = 0; ok && i < YAFFS_NOBJECT_BUCKETS; i++){ + ylist_for_each(lh, &dev->objectBucket[i].list) { + if (lh) { + obj = ylist_entry(lh, yaffs_Object, hashLink); + if (!obj->deferedFree) { + yaffs_ObjectToCheckpointObject(&cp,obj); + cp.structType = sizeof(cp); + + T(YAFFS_TRACE_CHECKPOINT,( + TSTR("Checkpoint write object %d parent %d type %d chunk %d obj addr %x" TENDSTR), + cp.objectId,cp.parentId,cp.variantType,cp.hdrChunk,(unsigned) obj)); + + ok = (yaffs_CheckpointWrite(dev,&cp,sizeof(cp)) == sizeof(cp)); + + if(ok && obj->variantType == YAFFS_OBJECT_TYPE_FILE){ + ok = yaffs_WriteCheckpointTnodes(obj); + } + } + } } + } + + /* Dump end of list */ + memset(&cp,0xFF,sizeof(yaffs_CheckpointObject)); + cp.structType = sizeof(cp); + + if(ok) + ok = (yaffs_CheckpointWrite(dev,&cp,sizeof(cp)) == sizeof(cp)); + + return ok ? 1 : 0; +} - return NULL; - - theOne = -1; - usage = 0; /* just to stop the compiler grizzling */ - - for (i = 0; i < dev->nShortOpCaches; i++) { - if (!dev->srCache[i].dirty && - ((dev->srCache[i].lastUse < usage && theOne >= 0) || - theOne < 0)) { - usage = dev->srCache[i].lastUse; - theOne = i; +static int yaffs_ReadCheckpointObjects(yaffs_Device *dev) +{ + yaffs_Object *obj; + yaffs_CheckpointObject cp; + int ok = 1; + int done = 0; + yaffs_Object *hardList = NULL; + + while(ok && !done) { + ok = (yaffs_CheckpointRead(dev,&cp,sizeof(cp)) == sizeof(cp)); + if(cp.structType != sizeof(cp)) { + T(YAFFS_TRACE_CHECKPOINT,(TSTR("struct size %d instead of %d ok %d"TENDSTR), + cp.structType,sizeof(cp),ok)); + ok = 0; + } + + T(YAFFS_TRACE_CHECKPOINT,(TSTR("Checkpoint read object %d parent %d type %d chunk %d " TENDSTR), + cp.objectId,cp.parentId,cp.variantType,cp.hdrChunk)); + + if(ok && cp.objectId == ~0) + done = 1; + else if(ok){ + obj = yaffs_FindOrCreateObjectByNumber(dev,cp.objectId, cp.variantType); + if(obj) { + ok = yaffs_CheckpointObjectToObject(obj,&cp); + if (!ok) + break; + if(obj->variantType == YAFFS_OBJECT_TYPE_FILE) { + ok = yaffs_ReadCheckpointTnodes(obj); + } else if(obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) { + obj->hardLinks.next = + (struct ylist_head *) + hardList; + hardList = obj; + } + } + else + ok = 0; } - - - return theOne >= 0 ? &dev->srCache[theOne] : NULL; - } else { - return NULL; } + + if(ok) + yaffs_HardlinkFixup(dev,hardList); + + return ok ? 1 : 0; +} +static int yaffs_WriteCheckpointSum(yaffs_Device *dev) +{ + __u32 checkpointSum; + int ok; + + yaffs_GetCheckpointSum(dev,&checkpointSum); + + ok = (yaffs_CheckpointWrite(dev,&checkpointSum,sizeof(checkpointSum)) == sizeof(checkpointSum)); + + if(!ok) + return 0; + + return 1; } -static yaffs_ChunkCache *yaffs_GrabChunkCache(yaffs_Device * dev) +static int yaffs_ReadCheckpointSum(yaffs_Device *dev) { - yaffs_ChunkCache *cache; - yaffs_Object *theObj; - int usage; - int i; - int pushout; + __u32 checkpointSum0; + __u32 checkpointSum1; + int ok; + + yaffs_GetCheckpointSum(dev,&checkpointSum0); + + ok = (yaffs_CheckpointRead(dev,&checkpointSum1,sizeof(checkpointSum1)) == sizeof(checkpointSum1)); + + if(!ok) + return 0; + + if(checkpointSum0 != checkpointSum1) + return 0; + + return 1; +} - if (dev->nShortOpCaches > 0) { - /* Try find a non-dirty one... */ - cache = yaffs_GrabChunkCacheWorker(dev); +static int yaffs_WriteCheckpointData(yaffs_Device *dev) +{ - 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. - */ + int ok = 1; + + if(dev->skipCheckpointWrite || !dev->isYaffs2){ + T(YAFFS_TRACE_CHECKPOINT,(TSTR("skipping checkpoint write" TENDSTR))); + ok = 0; + } + + if(ok) + ok = yaffs_CheckpointOpen(dev,1); + + if(ok){ + T(YAFFS_TRACE_CHECKPOINT,(TSTR("write checkpoint validity" TENDSTR))); + ok = yaffs_WriteCheckpointValidityMarker(dev,1); + } + if(ok){ + T(YAFFS_TRACE_CHECKPOINT,(TSTR("write checkpoint device" TENDSTR))); + ok = yaffs_WriteCheckpointDevice(dev); + } + if(ok){ + T(YAFFS_TRACE_CHECKPOINT,(TSTR("write checkpoint objects" TENDSTR))); + ok = yaffs_WriteCheckpointObjects(dev); + } + if(ok){ + T(YAFFS_TRACE_CHECKPOINT,(TSTR("write checkpoint validity" TENDSTR))); + ok = yaffs_WriteCheckpointValidityMarker(dev,0); + } + + if(ok){ + ok = yaffs_WriteCheckpointSum(dev); + } + + + if(!yaffs_CheckpointClose(dev)) + ok = 0; + + if(ok) + dev->isCheckpointed = 1; + else + dev->isCheckpointed = 0; - /* With locking we can't assume we can use entry zero */ + return dev->isCheckpointed; +} - theObj = NULL; - usage = -1; - cache = NULL; - pushout = -1; +static int yaffs_ReadCheckpointData(yaffs_Device *dev) +{ + int ok = 1; + + if(dev->skipCheckpointRead || !dev->isYaffs2){ + T(YAFFS_TRACE_CHECKPOINT,(TSTR("skipping checkpoint read" TENDSTR))); + ok = 0; + } + + if(ok) + ok = yaffs_CheckpointOpen(dev,0); /* open for read */ + + if(ok){ + T(YAFFS_TRACE_CHECKPOINT,(TSTR("read checkpoint validity" TENDSTR))); + ok = yaffs_ReadCheckpointValidityMarker(dev,1); + } + if(ok){ + T(YAFFS_TRACE_CHECKPOINT,(TSTR("read checkpoint device" TENDSTR))); + ok = yaffs_ReadCheckpointDevice(dev); + } + if(ok){ + T(YAFFS_TRACE_CHECKPOINT,(TSTR("read checkpoint objects" TENDSTR))); + ok = yaffs_ReadCheckpointObjects(dev); + } + if(ok){ + T(YAFFS_TRACE_CHECKPOINT,(TSTR("read checkpoint validity" TENDSTR))); + ok = yaffs_ReadCheckpointValidityMarker(dev,0); + } + + if(ok){ + ok = yaffs_ReadCheckpointSum(dev); + T(YAFFS_TRACE_CHECKPOINT,(TSTR("read checkpoint checksum %d" TENDSTR),ok)); + } - for (i = 0; i < dev->nShortOpCaches; i++) { - if (dev->srCache[i].object && - !dev->srCache[i].locked && - (dev->srCache[i].lastUse < usage || !cache)) - { - usage = dev->srCache[i].lastUse; - theObj = dev->srCache[i].object; - cache = &dev->srCache[i]; - pushout = i; - } - } + if(!yaffs_CheckpointClose(dev)) + ok = 0; - if (!cache || cache->dirty) { - /* Flush and try again */ - yaffs_FlushFilesChunkCache(theObj); - cache = yaffs_GrabChunkCacheWorker(dev); - } + if(ok) + dev->isCheckpointed = 1; + else + dev->isCheckpointed = 0; - } - return cache; - } else - return NULL; + return ok ? 1 : 0; } -/* Find a cached chunk */ -static yaffs_ChunkCache *yaffs_FindChunkCache(const yaffs_Object * obj, - int chunkId) +static void yaffs_InvalidateCheckpoint(yaffs_Device *dev) { - yaffs_Device *dev = obj->myDev; - int i; - if (dev->nShortOpCaches > 0) { - for (i = 0; i < dev->nShortOpCaches; i++) { - if (dev->srCache[i].object == obj && - dev->srCache[i].chunkId == chunkId) { - dev->cacheHits++; - - return &dev->srCache[i]; - } - } + if(dev->isCheckpointed || + dev->blocksInCheckpoint > 0){ + dev->isCheckpointed = 0; + yaffs_CheckpointInvalidateStream(dev); + if(dev->superBlock && dev->markSuperBlockDirty) + dev->markSuperBlockDirty(dev->superBlock); } - return NULL; } -/* Mark the chunk for the least recently used algorithym */ -static void yaffs_UseChunkCache(yaffs_Device * dev, yaffs_ChunkCache * cache, - int isAWrite) -{ - if (dev->nShortOpCaches > 0) { - if (dev->srLastUse < 0 || dev->srLastUse > 100000000) { - /* Reset the cache usages */ - int i; - for (i = 1; i < dev->nShortOpCaches; i++) { - dev->srCache[i].lastUse = 0; - } - dev->srLastUse = 0; - } +int yaffs_CheckpointSave(yaffs_Device *dev) +{ - dev->srLastUse++; + T(YAFFS_TRACE_CHECKPOINT,(TSTR("save entry: isCheckpointed %d"TENDSTR),dev->isCheckpointed)); - cache->lastUse = dev->srLastUse; + yaffs_VerifyObjects(dev); + yaffs_VerifyBlocks(dev); + yaffs_VerifyFreeChunks(dev); - if (isAWrite) { - cache->dirty = 1; - } + if(!dev->isCheckpointed) { + yaffs_InvalidateCheckpoint(dev); + yaffs_WriteCheckpointData(dev); } -} - -/* 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); + + T(YAFFS_TRACE_ALWAYS,(TSTR("save exit: isCheckpointed %d"TENDSTR),dev->isCheckpointed)); - if (cache) { - cache->object = NULL; - } - } + return dev->isCheckpointed; } -/* 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 yaffs_CheckpointRestore(yaffs_Device *dev) { - int i; - yaffs_Device *dev = in->myDev; + int retval; + T(YAFFS_TRACE_CHECKPOINT,(TSTR("restore entry: isCheckpointed %d"TENDSTR),dev->isCheckpointed)); + + retval = yaffs_ReadCheckpointData(dev); - if (dev->nShortOpCaches > 0) { - /* Invalidate it. */ - for (i = 0; i < dev->nShortOpCaches; i++) { - if (dev->srCache[i].object == in) { - dev->srCache[i].object = NULL; - } - } + if(dev->isCheckpointed){ + yaffs_VerifyObjects(dev); + yaffs_VerifyBlocks(dev); + yaffs_VerifyFreeChunks(dev); } + + T(YAFFS_TRACE_CHECKPOINT,(TSTR("restore exit: isCheckpointed %d"TENDSTR),dev->isCheckpointed)); + + return retval; } /*--------------------- File read/write ------------------------ @@ -3126,12 +4754,12 @@ static void yaffs_InvalidateWholeChunkCache(yaffs_Object * in) * Curve-balls: the first chunk might also be the last chunk. */ -int yaffs_ReadDataFromFile(yaffs_Object * in, __u8 * buffer, __u32 offset, +int yaffs_ReadDataFromFile(yaffs_Object * in, __u8 * buffer, loff_t offset, int nBytes) { int chunk; - int start; + __u32 start; int nToCopy; int n = nBytes; int nDone = 0; @@ -3142,25 +4770,27 @@ int yaffs_ReadDataFromFile(yaffs_Object * in, __u8 * buffer, __u32 offset, dev = in->myDev; while (n > 0) { - chunk = offset / dev->nBytesPerChunk + 1; /* The first chunk is 1 */ - start = offset % dev->nBytesPerChunk; + //chunk = offset / dev->nDataBytesPerChunk + 1; + //start = offset % dev->nDataBytesPerChunk; + yaffs_AddrToChunk(dev,offset,&chunk,&start); + chunk++; /* 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->nDataBytesPerChunk) { nToCopy = n; } else { - nToCopy = dev->nBytesPerChunk - start; + nToCopy = dev->nDataBytesPerChunk - start; } 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) + * or we're using inband tags then use the cache (if there is caching) * else bypass the cache. */ - if (cache || nToCopy != dev->nBytesPerChunk) { + if (cache || nToCopy != dev->nDataBytesPerChunk || dev->inbandTags) { if (dev->nShortOpCaches > 0) { /* If we can't find the data in the cache, then load it up. */ @@ -3181,14 +4811,9 @@ int yaffs_ReadDataFromFile(yaffs_Object * in, __u8 * buffer, __u32 offset, cache->locked = 1; -#ifdef CONFIG_YAFFS_WINCE - yfsd_UnlockYAFFS(TRUE); -#endif + memcpy(buffer, &cache->data[start], nToCopy); -#ifdef CONFIG_YAFFS_WINCE - yfsd_LockYAFFS(TRUE); -#endif cache->locked = 0; } else { /* Read into the local buffer then copy..*/ @@ -3197,41 +4822,19 @@ int yaffs_ReadDataFromFile(yaffs_Object * in, __u8 * buffer, __u32 offset, yaffs_GetTempBuffer(dev, __LINE__); yaffs_ReadChunkDataFromObject(in, chunk, localBuffer); -#ifdef CONFIG_YAFFS_WINCE - yfsd_UnlockYAFFS(TRUE); -#endif + memcpy(buffer, &localBuffer[start], nToCopy); -#ifdef CONFIG_YAFFS_WINCE - yfsd_LockYAFFS(TRUE); -#endif + yaffs_ReleaseTempBuffer(dev, localBuffer, __LINE__); } } else { -#ifdef CONFIG_YAFFS_WINCE - __u8 *localBuffer = yaffs_GetTempBuffer(dev, __LINE__); - /* 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); - -#ifdef CONFIG_YAFFS_WINCE - yfsd_UnlockYAFFS(TRUE); -#endif - memcpy(buffer, localBuffer, dev->nBytesPerChunk); - -#ifdef CONFIG_YAFFS_WINCE - yfsd_LockYAFFS(TRUE); - yaffs_ReleaseTempBuffer(dev, localBuffer, __LINE__); -#endif - -#else /* A full chunk. Read directly into the supplied buffer. */ yaffs_ReadChunkDataFromObject(in, chunk, buffer); -#endif + } n -= nToCopy; @@ -3244,33 +4847,44 @@ int yaffs_ReadDataFromFile(yaffs_Object * in, __u8 * buffer, __u32 offset, return nDone; } -int yaffs_WriteDataToFile(yaffs_Object * in, const __u8 * buffer, __u32 offset, +int yaffs_WriteDataToFile(yaffs_Object * in, const __u8 * buffer, loff_t offset, int nBytes, int writeThrough) { int chunk; - int start; + __u32 start; int nToCopy; - int n = nBytes; - int nDone = 0; - int nToWriteBack; - int startOfWrite = offset; - int chunkWritten = 0; - int nBytesRead; + int n = nBytes; + int nDone = 0; + int nToWriteBack; + int startOfWrite = offset; + int chunkWritten = 0; + __u32 nBytesRead; + __u32 chunkStart; yaffs_Device *dev; dev = in->myDev; while (n > 0 && chunkWritten >= 0) { - chunk = offset / dev->nBytesPerChunk + 1; - start = offset % dev->nBytesPerChunk; + //chunk = offset / dev->nDataBytesPerChunk + 1; + //start = offset % dev->nDataBytesPerChunk; + yaffs_AddrToChunk(dev,offset,&chunk,&start); + + if(chunk * dev->nDataBytesPerChunk + start != offset || + start >= dev->nDataBytesPerChunk){ + T(YAFFS_TRACE_ERROR,( + TSTR("AddrToChunk of offset %d gives chunk %d start %d" + TENDSTR), + (int)offset, chunk,start)); + } + chunk++; /* 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->nDataBytesPerChunk) { nToCopy = n; /* Now folks, to calculate how many bytes to write back.... @@ -3278,29 +4892,38 @@ int yaffs_WriteDataToFile(yaffs_Object * in, const __u8 * buffer, __u32 offset, * we need to write back as much as was there before. */ - nBytesRead = - in->variant.fileVariant.fileSize - - ((chunk - 1) * dev->nBytesPerChunk); + chunkStart = ((chunk - 1) * dev->nDataBytesPerChunk); + + if(chunkStart > in->variant.fileVariant.fileSize) + nBytesRead = 0; /* Past end of file */ + else + nBytesRead = in->variant.fileVariant.fileSize - chunkStart; - if (nBytesRead > dev->nBytesPerChunk) { - nBytesRead = dev->nBytesPerChunk; + if (nBytesRead > dev->nDataBytesPerChunk) { + nBytesRead = dev->nDataBytesPerChunk; } nToWriteBack = (nBytesRead > (start + n)) ? nBytesRead : (start + n); + + if(nToWriteBack < 0 || nToWriteBack > dev->nDataBytesPerChunk) + YBUG(); } else { - nToCopy = dev->nBytesPerChunk - start; - nToWriteBack = dev->nBytesPerChunk; + nToCopy = dev->nDataBytesPerChunk - start; + nToWriteBack = dev->nDataBytesPerChunk; } - if (nToCopy != dev->nBytesPerChunk) { - /* An incomplete start or end chunk (or maybe both start and end chunk) */ + if (nToCopy != dev->nDataBytesPerChunk || dev->inbandTags) { + /* An incomplete start or end chunk (or maybe both start and end chunk), + * or we're using inband tags, so we want to use the cache buffers. + */ if (dev->nShortOpCaches > 0) { yaffs_ChunkCache *cache; /* If we can't find the data in the cache, then load the cache */ cache = yaffs_FindChunkCache(in, chunk); + if (!cache && yaffs_CheckSpaceForAllocation(in-> myDev)) { @@ -3313,20 +4936,24 @@ int yaffs_WriteDataToFile(yaffs_Object * in, const __u8 * buffer, __u32 offset, cache-> data); } + else if(cache && + !cache->dirty && + !yaffs_CheckSpaceForAllocation(in->myDev)){ + /* Drop the cache if it was a read cache item and + * no space check has been made for it. + */ + cache = NULL; + } if (cache) { yaffs_UseChunkCache(dev, cache, 1); cache->locked = 1; -#ifdef CONFIG_YAFFS_WINCE - yfsd_UnlockYAFFS(TRUE); -#endif + memcpy(&cache->data[start], buffer, nToCopy); -#ifdef CONFIG_YAFFS_WINCE - yfsd_LockYAFFS(TRUE); -#endif + cache->locked = 0; cache->nBytes = nToWriteBack; @@ -3354,15 +4981,10 @@ int yaffs_WriteDataToFile(yaffs_Object * in, const __u8 * buffer, __u32 offset, yaffs_ReadChunkDataFromObject(in, chunk, localBuffer); -#ifdef CONFIG_YAFFS_WINCE - yfsd_UnlockYAFFS(TRUE); -#endif + memcpy(&localBuffer[start], buffer, nToCopy); -#ifdef CONFIG_YAFFS_WINCE - yfsd_LockYAFFS(TRUE); -#endif chunkWritten = yaffs_WriteChunkDataToObject(in, chunk, localBuffer, @@ -3375,31 +4997,15 @@ int yaffs_WriteDataToFile(yaffs_Object * in, const __u8 * buffer, __u32 offset, } } else { - -#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 - */ - __u8 *localBuffer = yaffs_GetTempBuffer(dev, __LINE__); -#ifdef CONFIG_YAFFS_WINCE - yfsd_UnlockYAFFS(TRUE); -#endif - memcpy(localBuffer, buffer, dev->nBytesPerChunk); -#ifdef CONFIG_YAFFS_WINCE - yfsd_LockYAFFS(TRUE); -#endif - chunkWritten = - yaffs_WriteChunkDataToObject(in, chunk, localBuffer, - dev->nBytesPerChunk, - 0); - yaffs_ReleaseTempBuffer(dev, localBuffer, __LINE__); -#else /* A full chunk. Write directly from the supplied buffer. */ + + + chunkWritten = yaffs_WriteChunkDataToObject(in, chunk, buffer, - dev->nBytesPerChunk, + dev->nDataBytesPerChunk, 0); -#endif + /* Since we've overwritten the cached data, we better invalidate it. */ yaffs_InvalidateChunkCache(in, chunk); } @@ -3433,10 +5039,10 @@ static void yaffs_PruneResizedChunks(yaffs_Object * in, int newSize) yaffs_Device *dev = in->myDev; int oldFileSize = in->variant.fileVariant.fileSize; - int lastDel = 1 + (oldFileSize - 1) / dev->nBytesPerChunk; + int lastDel = 1 + (oldFileSize - 1) / dev->nDataBytesPerChunk; - int startDel = 1 + (newSize + dev->nBytesPerChunk - 1) / - dev->nBytesPerChunk; + int startDel = 1 + (newSize + dev->nDataBytesPerChunk - 1) / + dev->nDataBytesPerChunk; int i; int chunkId; @@ -3468,45 +5074,48 @@ static void yaffs_PruneResizedChunks(yaffs_Object * in, int newSize) } -int yaffs_ResizeFile(yaffs_Object * in, int newSize) +int yaffs_ResizeFile(yaffs_Object * in, loff_t newSize) { int oldFileSize = in->variant.fileVariant.fileSize; - int sizeOfPartialChunk; + __u32 newSizeOfPartialChunk; + int newFullChunks; + yaffs_Device *dev = in->myDev; - sizeOfPartialChunk = newSize % dev->nBytesPerChunk; + yaffs_AddrToChunk(dev, newSize, &newFullChunks, &newSizeOfPartialChunk); yaffs_FlushFilesChunkCache(in); yaffs_InvalidateWholeChunkCache(in); - yaffs_CheckGarbageCollection(dev); + yaffs_CheckGarbageCollection(dev); - if (in->variantType != YAFFS_OBJECT_TYPE_FILE) { - return yaffs_GetFileSize(in); - } + if (in->variantType != YAFFS_OBJECT_TYPE_FILE) { + return YAFFS_FAIL; + } - if (newSize == oldFileSize) { - return oldFileSize; - } + if (newSize == oldFileSize) { + return YAFFS_OK; + } - if (newSize < oldFileSize) { + if (newSize < oldFileSize) { yaffs_PruneResizedChunks(in, newSize); - if (sizeOfPartialChunk != 0) { - int lastChunk = 1 + newSize / dev->nBytesPerChunk; + if (newSizeOfPartialChunk != 0) { + int lastChunk = 1 + newFullChunks; + __u8 *localBuffer = yaffs_GetTempBuffer(dev, __LINE__); /* Got to read and rewrite the last chunk with its new size and zero pad */ yaffs_ReadChunkDataFromObject(in, lastChunk, localBuffer); - memset(localBuffer + sizeOfPartialChunk, 0, - dev->nBytesPerChunk - sizeOfPartialChunk); + memset(localBuffer + newSizeOfPartialChunk, 0, + dev->nDataBytesPerChunk - newSizeOfPartialChunk); yaffs_WriteChunkDataToObject(in, lastChunk, localBuffer, - sizeOfPartialChunk, 1); + newSizeOfPartialChunk, 1); yaffs_ReleaseTempBuffer(dev, localBuffer, __LINE__); } @@ -3514,18 +5123,25 @@ int yaffs_ResizeFile(yaffs_Object * in, int newSize) in->variant.fileVariant.fileSize = newSize; yaffs_PruneFileStructure(dev, &in->variant.fileVariant); + } else { + /* newsSize > oldFileSize */ + in->variant.fileVariant.fileSize = newSize; } + + + /* Write a new object header. * show we've shrunk the file, if need be * Do this only if the file is not in the deleted directories. */ - if (in->parent->objectId != YAFFS_OBJECTID_UNLINKED && + if (in->parent && + in->parent->objectId != YAFFS_OBJECTID_UNLINKED && in->parent->objectId != YAFFS_OBJECTID_DELETED) { yaffs_UpdateObjectHeader(in, NULL, 0, (newSize < oldFileSize) ? 1 : 0, 0); } - return newSize; + return YAFFS_OK; } loff_t yaffs_GetFileSize(yaffs_Object * obj) @@ -3578,13 +5194,13 @@ static int yaffs_DoGenericObjectDeletion(yaffs_Object * in) if (in->myDev->isYaffs2 && (in->parent != in->myDev->deletedDir)) { /* Move to the unlinked directory so we have a record that it was deleted. */ - yaffs_ChangeObjectName(in, in->myDev->deletedDir, NULL, 0, 0); + yaffs_ChangeObjectName(in, in->myDev->deletedDir,_Y("deleted"), 0, 0); } yaffs_RemoveObjectFromDirectory(in); - yaffs_DeleteChunk(in->myDev, in->chunkId, 1, __LINE__); - in->chunkId = -1; + yaffs_DeleteChunk(in->myDev, in->hdrChunk, 1, __LINE__); + in->hdrChunk = 0; yaffs_FreeObject(in); return YAFFS_OK; @@ -3601,56 +5217,59 @@ static int yaffs_UnlinkFile(yaffs_Object * in) int retVal; int immediateDeletion = 0; - if (1) { #ifdef __KERNEL__ - if (!in->myInode) { - immediateDeletion = 1; - - } + if (!in->myInode) { + immediateDeletion = 1; + } #else - if (in->inUse <= 0) { - immediateDeletion = 1; - - } + if (in->inUse <= 0) { + immediateDeletion = 1; + } #endif - if (immediateDeletion) { - retVal = - yaffs_ChangeObjectName(in, in->myDev->deletedDir, - NULL, 0, 0); - 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 { - retVal = - yaffs_ChangeObjectName(in, in->myDev->unlinkedDir, - NULL, 0, 0); - } + if (immediateDeletion) { + retVal = + yaffs_ChangeObjectName(in, in->myDev->deletedDir, + _Y("deleted"), 0, 0); + T(YAFFS_TRACE_TRACING, + (TSTR("yaffs: immediate deletion of file %d" TENDSTR), + in->objectId)); + in->deleted = 1; + in->myDev->nDeletedFiles++; + if (1 || in->myDev->isYaffs2) { + yaffs_ResizeFile(in, 0); + } + yaffs_SoftDeleteFile(in); + } else { + retVal = + yaffs_ChangeObjectName(in, in->myDev->unlinkedDir, + _Y("unlinked"), 0, 0); } + + return retVal; } int yaffs_DeleteFile(yaffs_Object * in) { int retVal = YAFFS_OK; + int deleted = in->deleted; + + yaffs_ResizeFile(in,0); if (in->nDataChunks > 0) { - /* Use soft deletion if there is data in the file */ + /* Use soft deletion if there is data in the file. + * That won't be the case if it has been resized to zero. + */ if (!in->unlinked) { retVal = yaffs_UnlinkFile(in); } if (retVal == YAFFS_OK && in->unlinked && !in->deleted) { - in->deleted = 1; + in->deleted = deleted = 1; in->myDev->nDeletedFiles++; yaffs_SoftDeleteFile(in); } - return in->deleted ? YAFFS_OK : YAFFS_FAIL; + return deleted ? YAFFS_OK : YAFFS_FAIL; } else { /* The file has no data chunks so we toss it immediately */ yaffs_FreeTnode(in->myDev, in->variant.fileVariant.top); @@ -3663,10 +5282,10 @@ int yaffs_DeleteFile(yaffs_Object * in) static int yaffs_DeleteDirectory(yaffs_Object * in) { - /* First check that the directory is empty. */ - if (list_empty(&in->variant.directoryVariant.children)) { - return yaffs_DoGenericObjectDeletion(in); - } + /* First check that the directory is empty. */ + if (ylist_empty(&in->variant.directoryVariant.children)) { + return yaffs_DoGenericObjectDeletion(in); + } return YAFFS_FAIL; @@ -3681,11 +5300,11 @@ static int yaffs_DeleteSymLink(yaffs_Object * in) static int yaffs_DeleteHardLink(yaffs_Object * in) { - /* remove this hardlink from the list assocaited with the equivalent - * object - */ - list_del(&in->hardLinks); - return yaffs_DoGenericObjectDeletion(in); + /* remove this hardlink from the list assocaited with the equivalent + * object + */ + ylist_del_init(&in->hardLinks); + return yaffs_DoGenericObjectDeletion(in); } static void yaffs_DestroyObject(yaffs_Object * obj) @@ -3714,12 +5333,12 @@ static void yaffs_DestroyObject(yaffs_Object * obj) static int yaffs_UnlinkWorker(yaffs_Object * obj) { - if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) { - return yaffs_DeleteHardLink(obj); - } else if (!list_empty(&obj->hardLinks)) { - /* Curve ball: We're unlinking an object that has a hardlink. - * - * This problem arises because we are not strictly following + if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) { + return yaffs_DeleteHardLink(obj); + } else if (!ylist_empty(&obj->hardLinks)) { + /* Curve ball: We're unlinking an object that has a hardlink. + * + * This problem arises because we are not strictly following * The Linux link/inode model. * * We can't really delete the object. @@ -3732,15 +5351,15 @@ static int yaffs_UnlinkWorker(yaffs_Object * obj) */ yaffs_Object *hl; - int retVal; - YCHAR name[YAFFS_MAX_NAME_LENGTH + 1]; + int retVal; + YCHAR name[YAFFS_MAX_NAME_LENGTH + 1]; - hl = list_entry(obj->hardLinks.next, yaffs_Object, hardLinks); + hl = ylist_entry(obj->hardLinks.next, yaffs_Object, hardLinks); - list_del_init(&hl->hardLinks); - list_del_init(&hl->siblings); + ylist_del_init(&hl->hardLinks); + ylist_del_init(&hl->siblings); - yaffs_GetObjectName(hl, name, YAFFS_MAX_NAME_LENGTH + 1); + yaffs_GetObjectName(hl, name, YAFFS_MAX_NAME_LENGTH + 1); retVal = yaffs_ChangeObjectName(obj, hl->parent, name, 0, 0); @@ -3771,11 +5390,9 @@ static int yaffs_UnlinkWorker(yaffs_Object * obj) } } -int yaffs_Unlink(yaffs_Object * dir, const YCHAR * name) -{ - yaffs_Object *obj; - obj = yaffs_FindObjectByName(dir, name); +static int yaffs_UnlinkObject( yaffs_Object *obj) +{ if (obj && obj->unlinkAllowed) { return yaffs_UnlinkWorker(obj); @@ -3784,6 +5401,13 @@ int yaffs_Unlink(yaffs_Object * dir, const YCHAR * name) return YAFFS_FAIL; } +int yaffs_Unlink(yaffs_Object * dir, const YCHAR * name) +{ + yaffs_Object *obj; + + obj = yaffs_FindObjectByName(dir, name); + return yaffs_UnlinkObject(obj); +} /*----------------------- Initialisation Scanning ---------------------- */ @@ -3812,6 +5436,8 @@ static void yaffs_HandleShadowedObject(yaffs_Device * dev, int objId, obj = yaffs_FindOrCreateObjectByNumber(dev, objId, YAFFS_OBJECT_TYPE_FILE); + if (!obj) + return; yaffs_AddObjectToDirectory(dev->unlinkedDir, obj); obj->variant.fileVariant.shrinkSize = 0; obj->valid = 1; /* So that we don't read any other info for this file */ @@ -3823,6 +5449,89 @@ typedef struct { int block; } yaffs_BlockIndex; + +static void yaffs_HardlinkFixup(yaffs_Device *dev, yaffs_Object *hardList) +{ + yaffs_Object *hl; + yaffs_Object *in; + + 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; + ylist_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; + YINIT_LIST_HEAD(&hl->hardLinks); + + } + + } + +} + + + + + +static int ybicmp(const void *a, const void *b){ + register int aseq = ((yaffs_BlockIndex *)a)->seq; + register int bseq = ((yaffs_BlockIndex *)b)->seq; + register int ablock = ((yaffs_BlockIndex *)a)->block; + register int bblock = ((yaffs_BlockIndex *)b)->block; + if( aseq == bseq ) + return ablock - bblock; + else + return aseq - bseq; + +} + + +struct yaffs_ShadowFixerStruct { + int objectId; + int shadowedId; + struct yaffs_ShadowFixerStruct *next; +}; + + +static void yaffs_StripDeletedObjects(yaffs_Device *dev) +{ + /* + * Sort out state of unlinked and deleted objects after scanning. + */ + struct ylist_head *i; + struct ylist_head *n; + yaffs_Object *l; + + /* Soft delete all the unlinked files */ + ylist_for_each_safe(i, n, + &dev->unlinkedDir->variant.directoryVariant.children) { + if (i) { + l = ylist_entry(i, yaffs_Object, siblings); + yaffs_DestroyObject(l); + } + } + + ylist_for_each_safe(i, n, + &dev->deletedDir->variant.directoryVariant.children) { + if (i) { + l = ylist_entry(i, yaffs_Object, siblings); + yaffs_DestroyObject(l); + } + } + +} + static int yaffs_Scan(yaffs_Device * dev) { yaffs_ExtendedTags tags; @@ -3830,25 +5539,28 @@ static int yaffs_Scan(yaffs_Device * dev) int blockIterator; int startIterator; int endIterator; - int nBlocksToScan = 0; + int result; int chunk; int c; int deleted; yaffs_BlockState state; yaffs_Object *hardList = NULL; - yaffs_Object *hl; yaffs_BlockInfo *bi; - int sequenceNumber; + __u32 sequenceNumber; yaffs_ObjectHeader *oh; yaffs_Object *in; yaffs_Object *parent; - int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1; + + int alloc_failed = 0; + + struct yaffs_ShadowFixerStruct *shadowFixerList = NULL; + __u8 *chunkData; - yaffs_BlockIndex *blockIndex = NULL; - + + T(YAFFS_TRACE_SCAN, (TSTR("yaffs_Scan starts intstartblk %d intendblk %d..." TENDSTR), dev->internalStartBlock, dev->internalEndBlock)); @@ -3857,10 +5569,6 @@ static int yaffs_Scan(yaffs_Device * dev) dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER; - if (dev->isYaffs2) { - blockIndex = YMALLOC(nBlocks * sizeof(yaffs_BlockIndex)); - } - /* Scan all the blocks to determine their state */ for (blk = dev->internalStartBlock; blk <= dev->internalEndBlock; blk++) { bi = yaffs_GetBlockInfo(dev, blk); @@ -3873,6 +5581,9 @@ static int yaffs_Scan(yaffs_Device * dev) bi->blockState = state; bi->sequenceNumber = sequenceNumber; + if(bi->sequenceNumber == YAFFS_SEQUENCE_BAD_BLOCK) + bi->blockState = state = YAFFS_BLOCK_STATE_DEAD; + T(YAFFS_TRACE_SCAN_DEBUG, (TSTR("Block scanning block %d state %d seq %d" TENDSTR), blk, state, sequenceNumber)); @@ -3885,70 +5596,21 @@ static int yaffs_Scan(yaffs_Device * dev) (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)); - } else { - startIterator = dev->internalStartBlock; - endIterator = dev->internalEndBlock; - } + startIterator = dev->internalStartBlock; + endIterator = dev->internalEndBlock; /* For each block.... */ - for (blockIterator = startIterator; blockIterator <= endIterator; + for (blockIterator = startIterator; !alloc_failed && blockIterator <= endIterator; blockIterator++) { + + YYIELD(); - if (dev->isYaffs2) { - /* get the block to scan in the correct order */ - blk = blockIndex[blockIterator].block; - } else { - blk = blockIterator; - } + YYIELD(); + + blk = blockIterator; bi = yaffs_GetBlockInfo(dev, blk); state = bi->blockState; @@ -3956,17 +5618,17 @@ static int yaffs_Scan(yaffs_Device * dev) deleted = 0; /* For each chunk in each block that needs scanning....*/ - for (c = 0; c < dev->nChunksPerBlock && + for (c = 0; !alloc_failed && c < dev->nChunksPerBlock && state == YAFFS_BLOCK_STATE_NEEDS_SCANNING; c++) { /* Read the tags and decide what to do */ chunk = blk * dev->nChunksPerBlock + c; - yaffs_ReadChunkWithTagsFromNAND(dev, chunk, NULL, + result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk, NULL, &tags); /* Let's have a good look at this chunk... */ - if (!dev->isYaffs2 && tags.chunkDeleted) { + if (tags.eccResult == YAFFS_ECC_RESULT_UNFIXED || tags.chunkDeleted) { /* YAFFS1 only... * A deleted chunk */ @@ -3995,18 +5657,6 @@ static int yaffs_Scan(yaffs_Device * dev) 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 += (dev->nChunksPerBlock - c); @@ -4024,12 +5674,20 @@ static int yaffs_Scan(yaffs_Device * dev) /* PutChunkIntoFile checks for a clash (two data chunks with * the same chunkId). */ - yaffs_PutChunkIntoFile(in, tags.chunkId, chunk, - 1); + + if(!in) + alloc_failed = 1; + + if(in){ + if(!yaffs_PutChunkIntoFile(in, tags.chunkId, chunk,1)) + alloc_failed = 1; + } + endpos = - (tags.chunkId - 1) * dev->nBytesPerChunk + + (tags.chunkId - 1) * dev->nDataBytesPerChunk + tags.byteCount; - if (in->variantType == YAFFS_OBJECT_TYPE_FILE + if (in && + in->variantType == YAFFS_OBJECT_TYPE_FILE && in->variant.fileVariant.scannedFileSize < endpos) { in->variant.fileVariant. @@ -4050,7 +5708,7 @@ static int yaffs_Scan(yaffs_Device * dev) yaffs_SetChunkBit(dev, blk, c); bi->pagesInUse++; - yaffs_ReadChunkWithTagsFromNAND(dev, chunk, + result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk, chunkData, NULL); @@ -4074,25 +5732,32 @@ static int yaffs_Scan(yaffs_Device * dev) objectId, oh->type); - if (oh->shadowsObject > 0) { - yaffs_HandleShadowedObject(dev, - oh-> - shadowsObject, - 0); + if(!in) + alloc_failed = 1; + + if (in && oh->shadowsObject > 0) { + + struct yaffs_ShadowFixerStruct *fixer; + fixer = YMALLOC(sizeof(struct yaffs_ShadowFixerStruct)); + if(fixer){ + fixer-> next = shadowFixerList; + shadowFixerList = fixer; + fixer->objectId = tags.objectId; + fixer->shadowedId = oh->shadowsObject; + } + } - if (in->valid) { + if (in && in->valid) { /* We have already filled this one. We have a duplicate and need to resolve it. */ unsigned existingSerial = in->serial; unsigned newSerial = tags.serialNumber; - if (dev->isYaffs2 || - ((existingSerial + 1) & 3) == - newSerial) { + if (((existingSerial + 1) & 3) == newSerial) { /* Use new one - destroy the exisiting one */ yaffs_DeleteChunk(dev, - in->chunkId, + in->hdrChunk, 1, __LINE__); in->valid = 0; } else { @@ -4102,7 +5767,7 @@ static int yaffs_Scan(yaffs_Device * dev) } } - if (!in->valid && + if (in && !in->valid && (tags.objectId == YAFFS_OBJECTID_ROOT || tags.objectId == YAFFS_OBJECTID_LOSTNFOUND)) { /* We only load some info, don't fiddle with directory structure */ @@ -4125,9 +5790,10 @@ static int yaffs_Scan(yaffs_Device * dev) in->yst_ctime = oh->yst_ctime; in->yst_rdev = oh->yst_rdev; #endif - in->chunkId = chunk; + in->hdrChunk = chunk; + in->serial = tags.serialNumber; - } else if (!in->valid) { + } else if (in && !in->valid) { /* we need to load this info */ in->valid = 1; @@ -4149,7 +5815,8 @@ static int yaffs_Scan(yaffs_Device * dev) in->yst_ctime = oh->yst_ctime; in->yst_rdev = oh->yst_rdev; #endif - in->chunkId = chunk; + in->hdrChunk = chunk; + in->serial = tags.serialNumber; yaffs_SetObjectName(in, oh->name); in->dirty = 0; @@ -4162,15 +5829,17 @@ static int yaffs_Scan(yaffs_Device * dev) yaffs_FindOrCreateObjectByNumber (dev, oh->parentObjectId, YAFFS_OBJECT_TYPE_DIRECTORY); - if (parent->variantType == + if(!parent) + alloc_failed = 1; + if (parent && 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 != + /* Set up as a directory */ + parent->variantType = + YAFFS_OBJECT_TYPE_DIRECTORY; + YINIT_LIST_HEAD(&parent->variant. + directoryVariant. + children); + } else if (!parent || parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) { /* Hoosterman, another problem.... @@ -4179,8 +5848,7 @@ static int yaffs_Scan(yaffs_Device * dev) T(YAFFS_TRACE_ERROR, (TSTR - ("yaffs tragedy: attempting to use non-directory as" - " a directory in scan. Put in lost+found." + ("yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found." TENDSTR))); parent = dev->lostNFoundDir; } @@ -4204,15 +5872,6 @@ static int yaffs_Scan(yaffs_Device * dev) /* Todo got a problem */ break; case YAFFS_OBJECT_TYPE_FILE: - if (dev->isYaffs2 - && oh->isShrink) { - /* Prune back the shrunken chunks */ - yaffs_PruneResizedChunks - (in, oh->fileSize); - /* Mark the block as having a shrinkHeader */ - bi->hasShrinkHeader = 1; - } - if (dev->useHeaderFileSize) in->variant.fileVariant. @@ -4222,13 +5881,13 @@ static int yaffs_Scan(yaffs_Device * dev) break; case YAFFS_OBJECT_TYPE_HARDLINK: in->variant.hardLinkVariant. - equivalentObjectId = - oh->equivalentObjectId; - in->hardLinks.next = - (struct list_head *) - hardList; - hardList = in; - break; + equivalentObjectId = + oh->equivalentObjectId; + in->hardLinks.next = + (struct ylist_head *) + hardList; + hardList = in; + break; case YAFFS_OBJECT_TYPE_DIRECTORY: /* Do nothing */ break; @@ -4236,16 +5895,19 @@ static int yaffs_Scan(yaffs_Device * dev) /* Do nothing */ break; case YAFFS_OBJECT_TYPE_SYMLINK: - in->variant.symLinkVariant. - alias = + in->variant.symLinkVariant.alias = yaffs_CloneString(oh->alias); + if(!in->variant.symLinkVariant.alias) + alloc_failed = 1; break; } - if (parent == dev->deletedDir) { +/* + if (parent == dev->deletedDir) { yaffs_DestroyObject(in); bi->hasShrinkHeader = 1; } +*/ } } } @@ -4266,64 +5928,108 @@ static int yaffs_Scan(yaffs_Device * dev) } - 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); - - } - - } - - /* Handle the unlinked files. Since they were left in an unlinked state we should - * just delete them. - */ + yaffs_HardlinkFixup(dev,hardList); + + /* Fix up any shadowed objects */ { - 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); + struct yaffs_ShadowFixerStruct *fixer; + yaffs_Object *obj; + + while(shadowFixerList){ + fixer = shadowFixerList; + shadowFixerList = fixer->next; + /* Complete the rename transaction by deleting the shadowed object + * then setting the object header to unshadowed. + */ + obj = yaffs_FindObjectByNumber(dev,fixer->shadowedId); + if(obj) + yaffs_DestroyObject(obj); + + obj = yaffs_FindObjectByNumber(dev,fixer->objectId); + if(obj){ + yaffs_UpdateObjectHeader(obj,NULL,1,0,0); } + + YFREE(fixer); } } yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__); + if(alloc_failed){ + return YAFFS_FAIL; + } + T(YAFFS_TRACE_SCAN, (TSTR("yaffs_Scan ends" TENDSTR))); + return YAFFS_OK; } +static void yaffs_CheckObjectDetailsLoaded(yaffs_Object *in) +{ + __u8 *chunkData; + yaffs_ObjectHeader *oh; + yaffs_Device *dev; + yaffs_ExtendedTags tags; + int result; + int alloc_failed = 0; + + if(!in) + return; + + dev = in->myDev; + +#if 0 + T(YAFFS_TRACE_SCAN,(TSTR("details for object %d %s loaded" TENDSTR), + in->objectId, + in->lazyLoaded ? "not yet" : "already")); +#endif + + if(in->lazyLoaded && in->hdrChunk > 0){ + in->lazyLoaded = 0; + chunkData = yaffs_GetTempBuffer(dev, __LINE__); + + result = yaffs_ReadChunkWithTagsFromNAND(dev,in->hdrChunk,chunkData,&tags); + oh = (yaffs_ObjectHeader *) chunkData; + + 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 + yaffs_SetObjectName(in, oh->name); + + if(in->variantType == YAFFS_OBJECT_TYPE_SYMLINK){ + in->variant.symLinkVariant.alias = + yaffs_CloneString(oh->alias); + if(!in->variant.symLinkVariant.alias) + alloc_failed = 1; /* Not returned to caller */ + } + + yaffs_ReleaseTempBuffer(dev,chunkData, __LINE__); + } +} + static int yaffs_ScanBackwards(yaffs_Device * dev) { yaffs_ExtendedTags tags; @@ -4334,21 +6040,29 @@ static int yaffs_ScanBackwards(yaffs_Device * dev) int nBlocksToScan = 0; int chunk; + int result; int c; int deleted; yaffs_BlockState state; yaffs_Object *hardList = NULL; - yaffs_Object *hl; yaffs_BlockInfo *bi; - int sequenceNumber; + __u32 sequenceNumber; yaffs_ObjectHeader *oh; yaffs_Object *in; yaffs_Object *parent; int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1; - + int itsUnlinked; __u8 *chunkData; + + int fileSize; + int isShrink; + int foundChunksInBlock; + int equivalentObjectId; + int alloc_failed = 0; + yaffs_BlockIndex *blockIndex = NULL; + int altBlockIndex = 0; if (!dev->isYaffs2) { T(YAFFS_TRACE_SCAN, @@ -4361,11 +6075,25 @@ static int yaffs_ScanBackwards(yaffs_Device * dev) ("yaffs_ScanBackwards starts intstartblk %d intendblk %d..." TENDSTR), dev->internalStartBlock, dev->internalEndBlock)); - chunkData = yaffs_GetTempBuffer(dev, __LINE__); dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER; blockIndex = YMALLOC(nBlocks * sizeof(yaffs_BlockIndex)); + + if(!blockIndex) { + blockIndex = YMALLOC_ALT(nBlocks * sizeof(yaffs_BlockIndex)); + altBlockIndex = 1; + } + + if(!blockIndex) { + T(YAFFS_TRACE_SCAN, + (TSTR("yaffs_Scan() could not allocate block index!" TENDSTR))); + return YAFFS_FAIL; + } + + dev->blocksInCheckpoint = 0; + + chunkData = yaffs_GetTempBuffer(dev, __LINE__); /* Scan all the blocks to determine their state */ for (blk = dev->internalStartBlock; blk <= dev->internalEndBlock; blk++) { @@ -4379,11 +6107,20 @@ static int yaffs_ScanBackwards(yaffs_Device * dev) bi->blockState = state; bi->sequenceNumber = sequenceNumber; + if(bi->sequenceNumber == YAFFS_SEQUENCE_CHECKPOINT_DATA) + bi->blockState = state = YAFFS_BLOCK_STATE_CHECKPOINT; + if(bi->sequenceNumber == YAFFS_SEQUENCE_BAD_BLOCK) + bi->blockState = state = YAFFS_BLOCK_STATE_DEAD; + T(YAFFS_TRACE_SCAN_DEBUG, (TSTR("Block scanning block %d state %d seq %d" TENDSTR), blk, state, sequenceNumber)); - if (state == YAFFS_BLOCK_STATE_DEAD) { + + if(state == YAFFS_BLOCK_STATE_CHECKPOINT){ + dev->blocksInCheckpoint++; + + } else 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) { @@ -4394,8 +6131,7 @@ static int yaffs_ScanBackwards(yaffs_Device * dev) } else if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) { /* Determine the highest sequence number */ - if (dev->isYaffs2 && - sequenceNumber >= YAFFS_LOWEST_SEQUENCE_NUMBER && + if (sequenceNumber >= YAFFS_LOWEST_SEQUENCE_NUMBER && sequenceNumber < YAFFS_HIGHEST_SEQUENCE_NUMBER) { blockIndex[nBlocksToScan].seq = sequenceNumber; @@ -4406,7 +6142,7 @@ static int yaffs_ScanBackwards(yaffs_Device * dev) if (sequenceNumber >= dev->sequenceNumber) { dev->sequenceNumber = sequenceNumber; } - } else if (dev->isYaffs2) { + } else { /* TODO: Nasty sequence number! */ T(YAFFS_TRACE_SCAN, (TSTR @@ -4417,11 +6153,23 @@ static int yaffs_ScanBackwards(yaffs_Device * dev) } } - /* - * Sort the blocks - * Dungy old bubble sort for now... - */ + T(YAFFS_TRACE_SCAN, + (TSTR("%d blocks to be sorted..." TENDSTR), nBlocksToScan)); + + + + YYIELD(); + + /* Sort the blocks */ +#ifndef CONFIG_YAFFS_USE_OWN_SORT + { + /* Use qsort now. */ + yaffs_qsort(blockIndex, nBlocksToScan, sizeof(yaffs_BlockIndex), ybicmp); + } +#else { + /* Dungy old bubble sort... */ + yaffs_BlockIndex temp; int i; int j; @@ -4434,6 +6182,11 @@ static int yaffs_ScanBackwards(yaffs_Device * dev) blockIndex[i] = temp; } } +#endif + + YYIELD(); + + T(YAFFS_TRACE_SCAN, (TSTR("...done" TENDSTR))); /* Now scan the blocks looking at the data. */ startIterator = 0; @@ -4442,80 +6195,108 @@ static int yaffs_ScanBackwards(yaffs_Device * dev) (TSTR("%d blocks to be scanned" TENDSTR), nBlocksToScan)); /* For each block.... backwards */ - for (blockIterator = endIterator; blockIterator >= startIterator; + for (blockIterator = endIterator; !alloc_failed && blockIterator >= startIterator; blockIterator--) { + /* Cooperative multitasking! This loop can run for so + long that watchdog timers expire. */ + YYIELD(); /* get the block to scan in the correct order */ blk = blockIndex[blockIterator].block; bi = yaffs_GetBlockInfo(dev, blk); + + state = bi->blockState; deleted = 0; /* For each chunk in each block that needs scanning.... */ - for (c = dev->nChunksPerBlock - 1; c >= 0 && + foundChunksInBlock = 0; + for (c = dev->nChunksPerBlock - 1; + !alloc_failed && 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, + result = 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 + /* An unassigned chunk in the block. + * If there are used chunks after this one, then + * it is a chunk that was skipped due to failing the erased + * check. Just skip it so that it can be deleted. + * But, more typically, We get here when this is an unallocated + * chunk and his means that either the block is empty or + * this is the one being allocated from + */ - if (c == 0) { + if(foundChunksInBlock) + { + /* This is a chunk that was skipped due to failing the erased check */ + + } else 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)); + if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING || + state == YAFFS_BLOCK_STATE_ALLOCATING) { + if(dev->sequenceNumber == bi->sequenceNumber) { + /* this is the block being allocated from */ + + 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; + } + else { + /* This is a partially written block that is not + * the current allocation block. This block must have + * had a write failure, so set up for retirement. + */ + + /* bi->needsRetiring = 1; ??? TODO */ + bi->gcPrioritise = 1; + + T(YAFFS_TRACE_ALWAYS, + (TSTR("Partially written block %d detected" TENDSTR), + blk)); + } + } - 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) { + + } else if (tags.eccResult == YAFFS_ECC_RESULT_UNFIXED){ + T(YAFFS_TRACE_SCAN, + (TSTR(" Unfixed ECC in chunk(%d:%d), chunk ignored"TENDSTR), + blk, c)); + + 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; + (tags.chunkId - 1) * dev->nDataBytesPerChunk; + + foundChunksInBlock = 1; + yaffs_SetChunkBit(dev, blk, c); bi->pagesInUse++; @@ -4524,19 +6305,27 @@ static int yaffs_ScanBackwards(yaffs_Device * dev) tags. objectId, YAFFS_OBJECT_TYPE_FILE); - if (in->variantType == YAFFS_OBJECT_TYPE_FILE + if(!in){ + /* Out of memory */ + alloc_failed = 1; + } + + if (in && + 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); + if(!yaffs_PutChunkIntoFile(in, tags.chunkId, + chunk, -1)){ + alloc_failed = 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 + + 1) * dev->nDataBytesPerChunk + tags.byteCount; if (!in->valid && /* have not got an object header yet */ @@ -4550,7 +6339,7 @@ static int yaffs_ScanBackwards(yaffs_Device * dev) scannedFileSize; } - } else { + } else if(in) { /* This chunk has been invalidated by a resize, so delete */ yaffs_DeleteChunk(dev, chunk, 1, __LINE__); @@ -4559,6 +6348,8 @@ static int yaffs_ScanBackwards(yaffs_Device * dev) /* chunkId == 0, so it is an ObjectHeader. * Thus, we read in the object header and make the object */ + foundChunksInBlock = 1; + yaffs_SetChunkBit(dev, blk, c); bi->pagesInUse++; @@ -4569,24 +6360,43 @@ static int yaffs_ScanBackwards(yaffs_Device * dev) in = yaffs_FindOrCreateObjectByNumber (dev, tags.objectId, tags.extraObjectType); + if (!in) + alloc_failed = 1; } - if (!in || !in->valid) { + if (!in || +#ifdef CONFIG_YAFFS_DISABLE_LAZY_LOAD + !in->valid || +#endif + tags.extraShadows || + (!in->valid && + (tags.objectId == YAFFS_OBJECTID_ROOT || + tags.objectId == YAFFS_OBJECTID_LOSTNFOUND)) + ) { /* 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, + result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk, chunkData, NULL); oh = (yaffs_ObjectHeader *) chunkData; + + if(dev->inbandTags){ + /* Fix up the header if they got corrupted by inband tags */ + oh->shadowsObject = oh->inbandShadowsObject; + oh->isShrink = oh->inbandIsShrink; + } - if (!in) + if (!in) { in = yaffs_FindOrCreateObjectByNumber(dev, tags.objectId, oh->type); + if (!in) + alloc_failed = 1; + } } @@ -4594,10 +6404,9 @@ static int yaffs_ScanBackwards(yaffs_Device * dev) /* 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" + ("yaffs tragedy: Could not make object for object %d at chunk %d during scan" TENDSTR), tags.objectId, chunk)); - + continue; } if (in->valid) { @@ -4606,21 +6415,11 @@ static int yaffs_ScanBackwards(yaffs_Device * dev) * 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)) + 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. @@ -4629,7 +6428,9 @@ static int yaffs_ScanBackwards(yaffs_Device * dev) (oh) ? oh-> parentObjectId : tags. extraParentObjectId; - unsigned isShrink = + + + isShrink = (oh) ? oh->isShrink : tags. extraIsShrinkHeader; @@ -4662,83 +6463,125 @@ static int yaffs_ScanBackwards(yaffs_Device * dev) } + if (!in->valid && in->variantType != + (oh ? oh->type : tags.extraObjectType)) + T(YAFFS_TRACE_ERROR, ( + TSTR("yaffs tragedy: Bad object type, " + TCONT("%d != %d, for object %d at chunk ") + TCONT("%d during scan") + TENDSTR), oh ? + oh->type : tags.extraObjectType, + in->variantType, tags.objectId, + chunk)); + 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; + + if(oh) { + in->variantType = oh->type; - in->yst_mode = oh->yst_mode; + 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]; + 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; + 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; + } else { + in->variantType = tags.extraObjectType; + in->lazyLoaded = 1; + } + + in->hdrChunk = chunk; } else if (!in->valid) { /* we need to load this info */ in->valid = 1; - in->variantType = oh->type; + in->hdrChunk = chunk; - in->yst_mode = oh->yst_mode; + if(oh) { + in->variantType = oh->type; + + 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]; + 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; + 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; - if (oh->shadowsObject > 0) { - yaffs_HandleShadowedObject(dev, + if (oh->shadowsObject > 0) + yaffs_HandleShadowedObject(dev, oh-> shadowsObject, 1); + + + yaffs_SetObjectName(in, oh->name); + parent = + yaffs_FindOrCreateObjectByNumber + (dev, oh->parentObjectId, + YAFFS_OBJECT_TYPE_DIRECTORY); + + fileSize = oh->fileSize; + isShrink = oh->isShrink; + equivalentObjectId = oh->equivalentObjectId; + } + else { + in->variantType = tags.extraObjectType; + parent = + yaffs_FindOrCreateObjectByNumber + (dev, tags.extraParentObjectId, + YAFFS_OBJECT_TYPE_DIRECTORY); + fileSize = tags.extraFileLength; + isShrink = tags.extraIsShrinkHeader; + equivalentObjectId = tags.extraEquivalentObjectId; + in->lazyLoaded = 1; - yaffs_SetObjectName(in, oh->name); + } in->dirty = 0; + if (!parent) + alloc_failed = 1; + /* directory stuff... * hook up to parent */ - parent = - yaffs_FindOrCreateObjectByNumber - (dev, oh->parentObjectId, - YAFFS_OBJECT_TYPE_DIRECTORY); - if (parent->variantType == + if (parent && 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 != + /* Set up as a directory */ + parent->variantType = + YAFFS_OBJECT_TYPE_DIRECTORY; + YINIT_LIST_HEAD(&parent->variant. + directoryVariant. + children); + } else if (!parent || parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) { /* Hoosterman, another problem.... @@ -4747,21 +6590,17 @@ static int yaffs_ScanBackwards(yaffs_Device * dev) T(YAFFS_TRACE_ERROR, (TSTR - ("yaffs tragedy: attempting to use non-directory as" - " a directory in scan. Put in lost+found." + ("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)) { - /* If it is unlinked at start up then it wants deleting */ - in->deleted = 1; - } + itsUnlinked = (parent == dev->deletedDir) || + (parent == dev->unlinkedDir); - if (oh->isShrink) { + if (isShrink) { /* Mark the block as having a shrinkHeader */ bi->hasShrinkHeader = 1; } @@ -4780,34 +6619,32 @@ static int yaffs_ScanBackwards(yaffs_Device * dev) case YAFFS_OBJECT_TYPE_FILE: if (in->variant.fileVariant. - scannedFileSize < - oh->fileSize) { + scannedFileSize < fileSize) { /* This covers the case where the file size is greater * than where the data is * This will happen if the file is resized to be larger * than its current data extents. */ - in->variant.fileVariant.fileSize = - oh->fileSize; + in->variant.fileVariant.fileSize = fileSize; in->variant.fileVariant.scannedFileSize = in->variant.fileVariant.fileSize; } - if (oh->isShrink && - in->variant.fileVariant.shrinkSize > - oh->fileSize) { - in->variant.fileVariant.shrinkSize = - oh->fileSize; + if (isShrink && + in->variant.fileVariant.shrinkSize > fileSize) { + in->variant.fileVariant.shrinkSize = fileSize; } break; case YAFFS_OBJECT_TYPE_HARDLINK: - in->variant.hardLinkVariant.equivalentObjectId = - oh->equivalentObjectId; - in->hardLinks.next = - (struct list_head *) hardList; - hardList = in; - break; + if(!itsUnlinked) { + in->variant.hardLinkVariant.equivalentObjectId = + equivalentObjectId; + in->hardLinks.next = + (struct ylist_head *) hardList; + hardList = in; + } + break; case YAFFS_OBJECT_TYPE_DIRECTORY: /* Do nothing */ break; @@ -4815,16 +6652,21 @@ static int yaffs_ScanBackwards(yaffs_Device * dev) /* Do nothing */ break; case YAFFS_OBJECT_TYPE_SYMLINK: - in->variant.symLinkVariant. - alias = + if(oh){ + in->variant.symLinkVariant.alias = yaffs_CloneString(oh-> alias); + if(!in->variant.symLinkVariant.alias) + alloc_failed = 1; + } break; } } + } - } + + } /* End of scanning for each chunk */ if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) { /* If we got this far while scanning, then the block is fully allocated. */ @@ -4842,73 +6684,130 @@ static int yaffs_ScanBackwards(yaffs_Device * dev) } - if (blockIndex) { + if (altBlockIndex) + YFREE_ALT(blockIndex); + else 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); + yaffs_HardlinkFixup(dev,hardList); + - in = yaffs_FindObjectByNumber(dev, - hl->variant.hardLinkVariant. - equivalentObjectId); + yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__); + + if(alloc_failed){ + return YAFFS_FAIL; + } - 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); + T(YAFFS_TRACE_SCAN, (TSTR("yaffs_ScanBackwards ends" TENDSTR))); - } + return YAFFS_OK; +} + +/*------------------------------ Directory Functions ----------------------------- */ +static void yaffs_VerifyObjectInDirectory(yaffs_Object *obj) +{ + struct ylist_head *lh; + yaffs_Object *listObj; + + int count = 0; + + if(!obj){ + T(YAFFS_TRACE_ALWAYS, (TSTR("No object to verify" TENDSTR))); + YBUG(); } - { - 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); - } - } + if(yaffs_SkipVerification(obj->myDev)) + return; + + if(!obj->parent){ + T(YAFFS_TRACE_ALWAYS, (TSTR("Object does not have parent" TENDSTR))); + YBUG(); + } + + if(obj->parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY){ + T(YAFFS_TRACE_ALWAYS, (TSTR("Parent is not directory" TENDSTR))); + YBUG(); + } + + /* Iterate through the objects in each hash entry */ + + ylist_for_each(lh, &obj->parent->variant.directoryVariant.children) { + if (lh) { + listObj = ylist_entry(lh, yaffs_Object, siblings); + yaffs_VerifyObject(listObj); + if(obj == listObj) + count ++; + } + } + + if(count != 1){ + T(YAFFS_TRACE_ALWAYS, (TSTR("Object in directory %d times" TENDSTR),count)); + YBUG(); + } - /* 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); +} - } - } +static void yaffs_VerifyDirectory(yaffs_Object *directory) +{ + + struct ylist_head *lh; + yaffs_Object *listObj; + + if(!directory) + YBUG(); + + if(yaffs_SkipFullVerification(directory->myDev)) + return; + + + if(directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY){ + T(YAFFS_TRACE_ALWAYS, (TSTR("Directory has wrong type: %d" TENDSTR),directory->variantType)); + YBUG(); } + + /* Iterate through the objects in each hash entry */ + + ylist_for_each(lh, &directory->variant.directoryVariant.children) { + if (lh) { + listObj = ylist_entry(lh, yaffs_Object, siblings); + if(listObj->parent != directory){ + T(YAFFS_TRACE_ALWAYS, (TSTR("Object in directory list has wrong parent %p" TENDSTR),listObj->parent)); + YBUG(); + } + yaffs_VerifyObjectInDirectory(listObj); + } + } + +} - yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__); - T(YAFFS_TRACE_SCAN, (TSTR("yaffs_ScanBackwards ends" TENDSTR))); +static void yaffs_RemoveObjectFromDirectory(yaffs_Object * obj) +{ + yaffs_Device *dev = obj->myDev; + yaffs_Object *parent; + + yaffs_VerifyObjectInDirectory(obj); + parent = obj->parent; + + yaffs_VerifyDirectory(parent); + + if(dev && dev->removeObjectCallback) + dev->removeObjectCallback(obj); + + + ylist_del_init(&obj->siblings); + obj->parent = NULL; + + yaffs_VerifyDirectory(parent); - return YAFFS_OK; } -/*------------------------------ Directory Functions ----------------------------- */ static void yaffs_AddObjectToDirectory(yaffs_Object * directory, yaffs_Object * obj) @@ -4929,41 +6828,46 @@ static void yaffs_AddObjectToDirectory(yaffs_Object * directory, YBUG(); } - if (obj->siblings.prev == NULL) { - /* Not initialised */ - INIT_LIST_HEAD(&obj->siblings); + if (obj->siblings.prev == NULL) { + /* Not initialised */ + YBUG(); - } 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; + } else if (ylist_empty(&obj->siblings)) { + YBUG(); + } - if (directory == obj->myDev->unlinkedDir + + yaffs_VerifyDirectory(directory); + + yaffs_RemoveObjectFromDirectory(obj); + + + /* Now add it */ + ylist_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_VerifyDirectory(directory); + yaffs_VerifyObjectInDirectory(obj); + + } yaffs_Object *yaffs_FindObjectByName(yaffs_Object * directory, const YCHAR * name) { - int sum; + int sum; - struct list_head *i; - YCHAR buffer[YAFFS_MAX_NAME_LENGTH + 1]; + struct ylist_head *i; + YCHAR buffer[YAFFS_MAX_NAME_LENGTH + 1]; - yaffs_Object *l; + yaffs_Object *l; if (!name) { return NULL; @@ -4983,25 +6887,29 @@ yaffs_Object *yaffs_FindObjectByName(yaffs_Object * directory, YBUG(); } - sum = yaffs_CalcNameSum(name); + sum = yaffs_CalcNameSum(name); - list_for_each(i, &directory->variant.directoryVariant.children) { - if (i) { - l = list_entry(i, yaffs_Object, siblings); + ylist_for_each(i, &directory->variant.directoryVariant.children) { + if (i) { + l = ylist_entry(i, yaffs_Object, siblings); + + if(l->parent != directory) + YBUG(); + + yaffs_CheckObjectDetailsLoaded(l); /* Special case for lost-n-found */ if (l->objectId == YAFFS_OBJECTID_LOSTNFOUND) { if (yaffs_strcmp(name, YAFFS_LOSTNFOUND_NAME) == 0) { return l; } - } else if (yaffs_SumCompare(l->sum, sum) || l->chunkId <= 0) - { - /* LostnFound cunk called Objxxx + } else if (yaffs_SumCompare(l->sum, sum) || l->hdrChunk <= 0){ + /* LostnFound chunk called Objxxx * Do a real check */ yaffs_GetObjectName(l, buffer, YAFFS_MAX_NAME_LENGTH); - if (yaffs_strcmp(name, buffer) == 0) { + if (yaffs_strncmp(name, buffer,YAFFS_MAX_NAME_LENGTH) == 0) { return l; } @@ -5015,12 +6923,12 @@ yaffs_Object *yaffs_FindObjectByName(yaffs_Object * directory, #if 0 int yaffs_ApplyToDirectoryChildren(yaffs_Object * theDir, - int (*fn) (yaffs_Object *)) + int (*fn) (yaffs_Object *)) { - struct list_head *i; - yaffs_Object *l; + struct ylist_head *i; + yaffs_Object *l; - if (!theDir) { + if (!theDir) { T(YAFFS_TRACE_ALWAYS, (TSTR ("tragedy: yaffs_FindObjectByName: null pointer directory" @@ -5031,15 +6939,15 @@ int yaffs_ApplyToDirectoryChildren(yaffs_Object * theDir, T(YAFFS_TRACE_ALWAYS, (TSTR ("tragedy: yaffs_FindObjectByName: non-directory" TENDSTR))); - YBUG(); - } - - list_for_each(i, &theDir->variant.directoryVariant.children) { - if (i) { - l = list_entry(i, yaffs_Object, siblings); - if (l && !fn(l)) { - return YAFFS_FAIL; - } + YBUG(); + } + + ylist_for_each(i, &theDir->variant.directoryVariant.children) { + if (i) { + l = ylist_entry(i, yaffs_Object, siblings); + if (l && !fn(l)) { + return YAFFS_FAIL; + } } } @@ -5057,6 +6965,7 @@ yaffs_Object *yaffs_GetEquivalentObject(yaffs_Object * obj) if (obj && obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) { /* We want the object id of the equivalent object, not this one */ obj = obj->variant.hardLinkVariant.equivalentObject; + yaffs_CheckObjectDetailsLoaded(obj); } return obj; @@ -5065,14 +6974,25 @@ yaffs_Object *yaffs_GetEquivalentObject(yaffs_Object * obj) int yaffs_GetObjectName(yaffs_Object * obj, YCHAR * name, int buffSize) { memset(name, 0, buffSize * sizeof(YCHAR)); + + yaffs_CheckObjectDetailsLoaded(obj); if (obj->objectId == YAFFS_OBJECTID_LOSTNFOUND) { yaffs_strncpy(name, YAFFS_LOSTNFOUND_NAME, buffSize - 1); - } else if (obj->chunkId <= 0) { + } else if (obj->hdrChunk <= 0) { YCHAR locName[20]; + YCHAR numString[20]; + YCHAR *x = &numString[19]; + unsigned v = obj->objectId; + numString[19] = 0; + while(v>0){ + x--; + *x = '0' + (v % 10); + v /= 10; + } /* make up a name */ - yaffs_sprintf(locName, _Y("%s%d"), YAFFS_LOSTNFOUND_PREFIX, - obj->objectId); + yaffs_strcpy(locName, YAFFS_LOSTNFOUND_PREFIX); + yaffs_strcat(locName,x); yaffs_strncpy(name, locName, buffSize - 1); } @@ -5082,15 +7002,16 @@ int yaffs_GetObjectName(yaffs_Object * obj, YCHAR * name, int buffSize) } #endif else { + int result; __u8 *buffer = yaffs_GetTempBuffer(obj->myDev, __LINE__); yaffs_ObjectHeader *oh = (yaffs_ObjectHeader *) buffer; - memset(buffer, 0, obj->myDev->nBytesPerChunk); + memset(buffer, 0, obj->myDev->nDataBytesPerChunk); - if (obj->chunkId >= 0) { - yaffs_ReadChunkWithTagsFromNAND(obj->myDev, - obj->chunkId, buffer, + if (obj->hdrChunk > 0) { + result = yaffs_ReadChunkWithTagsFromNAND(obj->myDev, + obj->hdrChunk, buffer, NULL); } yaffs_strncpy(name, oh->name, buffSize - 1); @@ -5114,22 +7035,22 @@ int yaffs_GetObjectFileLength(yaffs_Object * obj) return yaffs_strlen(obj->variant.symLinkVariant.alias); } else { /* Only a directory should drop through to here */ - return obj->myDev->nBytesPerChunk; + return obj->myDev->nDataBytesPerChunk; } } int yaffs_GetObjectLinkCount(yaffs_Object * obj) { - int count = 0; - struct list_head *i; + int count = 0; + struct ylist_head *i; - if (!obj->unlinked) { - count++; /* the object itself */ - } - list_for_each(i, &obj->hardLinks) { - count++; /* add the hard links; */ - } - return count; + if (!obj->unlinked) { + count++; /* the object itself */ + } + ylist_for_each(i, &obj->hardLinks) { + count++; /* add the hard links; */ + } + return count; } @@ -5251,7 +7172,7 @@ int yaffs_DumpObject(yaffs_Object * obj) ("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, + obj->dirty, obj->valid, obj->serial, obj->sum, obj->hdrChunk, yaffs_GetObjectType(obj), yaffs_GetObjectFileLength(obj))); return YAFFS_OK; @@ -5290,14 +7211,42 @@ static int yaffs_CheckDevFunctions(const yaffs_Device * dev) return 0; /* bad */ } + +static int yaffs_CreateInitialDirectories(yaffs_Device *dev) +{ + /* Initialise the unlinked, deleted, root and lost and found directories */ + + dev->lostNFoundDir = dev->rootDir = NULL; + dev->unlinkedDir = dev->deletedDir = NULL; + + dev->unlinkedDir = + 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); + + if(dev->lostNFoundDir && dev->rootDir && dev->unlinkedDir && dev->deletedDir){ + yaffs_AddObjectToDirectory(dev->rootDir, dev->lostNFoundDir); + return YAFFS_OK; + } + + return YAFFS_FAIL; +} + int yaffs_GutsInitialise(yaffs_Device * dev) { + int init_failed = 0; unsigned x; int bits; - int extraBits; - int nBlocks; - T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: yaffs_GutsInitialise()" TENDSTR))); + T(YAFFS_TRACE_TRACING, (TSTR("yaffs: yaffs_GutsInitialise()" TENDSTR))); /* Check stuff that must be set */ @@ -5311,6 +7260,8 @@ int yaffs_GutsInitialise(yaffs_Device * dev) dev->blockOffset = 0; dev->chunkOffset = 0; dev->nFreeChunks = 0; + + dev->gcBlock = -1; if (dev->startBlock == 0) { dev->internalStartBlock = dev->startBlock + 1; @@ -5321,12 +7272,19 @@ int yaffs_GutsInitialise(yaffs_Device * dev) /* Check geometry parameters. */ - if ((dev->isYaffs2 && dev->nBytesPerChunk < 1024) || (!dev->isYaffs2 && dev->nBytesPerChunk != 512) || dev->nChunksPerBlock < 2 || dev->nReservedBlocks < 2 || dev->internalStartBlock <= 0 || dev->internalEndBlock <= 0 || dev->internalEndBlock <= (dev->internalStartBlock + dev->nReservedBlocks + 2) // otherwise it is too small + if ((!dev->inbandTags && dev->isYaffs2 && dev->totalBytesPerChunk < 1024) || + (!dev->isYaffs2 && dev->totalBytesPerChunk < 512) || + (dev->inbandTags && !dev->isYaffs2 ) || + dev->nChunksPerBlock < 2 || + dev->nReservedBlocks < 2 || + 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: chunk size %d, type is yaffs%s " - TENDSTR), dev->nBytesPerChunk, dev->isYaffs2 ? "2" : "")); + ("yaffs: NAND geometry problems: chunk size %d, type is yaffs%s, inbandTags %d " + TENDSTR), dev->totalBytesPerChunk, dev->isYaffs2 ? "2" : "", dev->inbandTags)); return YAFFS_FAIL; } @@ -5335,6 +7293,12 @@ int yaffs_GutsInitialise(yaffs_Device * dev) (TSTR("yaffs: InitialiseNAND failed" TENDSTR))); return YAFFS_FAIL; } + + /* Sort out space for inband tags, if required */ + if(dev->inbandTags) + dev->nDataBytesPerChunk = dev->totalBytesPerChunk - sizeof(yaffs_PackedTags2TagsPart); + else + dev->nDataBytesPerChunk = dev->totalBytesPerChunk; /* Got the right mix of functions? */ if (!yaffs_CheckDevFunctions(dev)) { @@ -5363,33 +7327,54 @@ int yaffs_GutsInitialise(yaffs_Device * dev) dev->isMounted = 1; - nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1; - - /* OK now calculate a few things for the device + /* OK now calculate a few things for the device */ + + /* + * Calculate all the chunk size manipulation numbers: + */ + x = dev->nDataBytesPerChunk; + /* We always use dev->chunkShift and dev->chunkDiv */ + dev->chunkShift = Shifts(x); + x >>= dev->chunkShift; + dev->chunkDiv = x; + /* We only use chunk mask if chunkDiv is 1 */ + dev->chunkMask = (1<chunkShift) - 1; + + /* * Calculate chunkGroupBits. * We need to find the next power of 2 > than internalEndBlock */ x = dev->nChunksPerBlock * (dev->internalEndBlock + 1); - - for (bits = extraBits = 0; x > 1; bits++) { - if (x & 1) - extraBits++; - x >>= 1; + + bits = ShiftsGE(x); + + /* Set up tnode width if wide tnodes are enabled. */ + if(!dev->wideTnodesDisabled){ + /* bits must be even so that we end up with 32-bit words */ + if(bits & 1) + bits++; + if(bits < 16) + dev->tnodeWidth = 16; + else + dev->tnodeWidth = bits; } - - if (extraBits > 0) - bits++; - - /* Level0 Tnodes are 16 bits, so if the bitwidth of the + else + dev->tnodeWidth = 16; + + dev->tnodeMask = (1<tnodeWidth)-1; + + /* Level0 Tnodes are 16 bits or wider (if wide tnodes are enabled), + * so if the bitwidth of the * chunk range we're using is greater than 16 we need * to figure out chunk shift and chunkGroupSize */ - if (bits <= 16) { + + if (bits <= dev->tnodeWidth) dev->chunkGroupBits = 0; - } else { - dev->chunkGroupBits = bits - 16; - } + else + dev->chunkGroupBits = bits - dev->tnodeWidth; + dev->chunkGroupSize = 1 << dev->chunkGroupBits; @@ -5422,72 +7407,119 @@ int yaffs_GutsInitialise(yaffs_Device * dev) dev->nErasureFailures = 0; dev->nErasedBlocks = 0; dev->isDoingGC = 0; + dev->hasPendingPrioritisedGCs = 1; /* Assume the worst for now, will get fixed on first GC */ - /* Initialise temporary buffers */ - { - int i; - for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) { - dev->tempBuffer[i].line = 0; /* not in use */ - dev->tempBuffer[i].buffer = - YMALLOC(dev->nBytesPerChunk); - } - } - - yaffs_InitialiseBlocks(dev, nBlocks); - - yaffs_InitialiseTnodes(dev); - - yaffs_InitialiseObjects(dev); - - dev->gcCleanupList = YMALLOC(dev->nChunksPerBlock * sizeof(__u32)); - - if (dev->nShortOpCaches > 0) { + /* Initialise temporary buffers and caches. */ + if(!yaffs_InitialiseTempBuffers(dev)) + init_failed = 1; + + dev->srCache = NULL; + dev->gcCleanupList = NULL; + + + if (!init_failed && + dev->nShortOpCaches > 0) { int i; + void *buf; + int srCacheBytes = dev->nShortOpCaches * sizeof(yaffs_ChunkCache); 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 = YMALLOC(srCacheBytes); + + buf = (__u8 *) dev->srCache; + + if(dev->srCache) + memset(dev->srCache,0,srCacheBytes); + + for (i = 0; i < dev->nShortOpCaches && buf; i++) { dev->srCache[i].object = NULL; dev->srCache[i].lastUse = 0; dev->srCache[i].dirty = 0; - dev->srCache[i].data = YMALLOC(dev->nBytesPerChunk); + dev->srCache[i].data = buf = YMALLOC_DMA(dev->totalBytesPerChunk); } + if(!buf) + init_failed = 1; + dev->srLastUse = 0; } dev->cacheHits = 0; + + if(!init_failed){ + dev->gcCleanupList = YMALLOC(dev->nChunksPerBlock * sizeof(__u32)); + if(!dev->gcCleanupList) + init_failed = 1; + } - /* Initialise the unlinked, root and lost and found directories */ - dev->lostNFoundDir = dev->rootDir = NULL; - dev->unlinkedDir = dev->deletedDir = NULL; + if (dev->isYaffs2) { + dev->useHeaderFileSize = 1; + } + if(!init_failed && !yaffs_InitialiseBlocks(dev)) + init_failed = 1; + + yaffs_InitialiseTnodes(dev); + yaffs_InitialiseObjects(dev); - dev->unlinkedDir = - yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_UNLINKED, S_IFDIR); - dev->deletedDir = - yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_DELETED, S_IFDIR); + if(!init_failed && !yaffs_CreateInitialDirectories(dev)) + init_failed = 1; - 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); - yaffs_AddObjectToDirectory(dev->rootDir, dev->lostNFoundDir); - if (dev->isYaffs2) { - dev->useHeaderFileSize = 1; + if(!init_failed){ + /* Now scan the flash. */ + if (dev->isYaffs2) { + if(yaffs_CheckpointRestore(dev)) { + yaffs_CheckObjectDetailsLoaded(dev->rootDir); + T(YAFFS_TRACE_ALWAYS, + (TSTR("yaffs: restored from checkpoint" TENDSTR))); + } else { + + /* Clean up the mess caused by an aborted checkpoint load + * and scan backwards. + */ + yaffs_DeinitialiseBlocks(dev); + yaffs_DeinitialiseTnodes(dev); + yaffs_DeinitialiseObjects(dev); + + + dev->nErasedBlocks = 0; + dev->nFreeChunks = 0; + dev->allocationBlock = -1; + dev->allocationPage = -1; + dev->nDeletedFiles = 0; + dev->nUnlinkedFiles = 0; + dev->nBackgroundDeletions = 0; + dev->oldestDirtySequence = 0; + + if(!init_failed && !yaffs_InitialiseBlocks(dev)) + init_failed = 1; + + yaffs_InitialiseTnodes(dev); + yaffs_InitialiseObjects(dev); + + if(!init_failed && !yaffs_CreateInitialDirectories(dev)) + init_failed = 1; + + if(!init_failed && !yaffs_ScanBackwards(dev)) + init_failed = 1; + } + }else + if(!yaffs_Scan(dev)) + init_failed = 1; + + yaffs_StripDeletedObjects(dev); } + + if(init_failed){ + /* Clean up the mess */ + T(YAFFS_TRACE_TRACING, + (TSTR("yaffs: yaffs_GutsInitialise() aborted.\n" TENDSTR))); - /* Now scan the flash. */ - if (dev->isYaffs2) - yaffs_ScanBackwards(dev); - else - yaffs_Scan(dev); + yaffs_Deinitialise(dev); + return YAFFS_FAIL; + } /* Zero out stats */ dev->nPageReads = 0; @@ -5499,8 +7531,10 @@ int yaffs_GutsInitialise(yaffs_Device * dev) dev->nRetiredBlocks = 0; yaffs_VerifyFreeChunks(dev); + yaffs_VerifyBlocks(dev); + - T(YAFFS_TRACE_ALWAYS, + T(YAFFS_TRACE_TRACING, (TSTR("yaffs: yaffs_GutsInitialise() done.\n" TENDSTR))); return YAFFS_OK; @@ -5514,13 +7548,17 @@ void yaffs_Deinitialise(yaffs_Device * dev) yaffs_DeinitialiseBlocks(dev); yaffs_DeinitialiseTnodes(dev); yaffs_DeinitialiseObjects(dev); - if (dev->nShortOpCaches > 0) { + if (dev->nShortOpCaches > 0 && + dev->srCache) { for (i = 0; i < dev->nShortOpCaches; i++) { - YFREE(dev->srCache[i].data); + if(dev->srCache[i].data) + YFREE(dev->srCache[i].data); + dev->srCache[i].data = NULL; } YFREE(dev->srCache); + dev->srCache = NULL; } YFREE(dev->gcCleanupList); @@ -5529,7 +7567,11 @@ void yaffs_Deinitialise(yaffs_Device * dev) YFREE(dev->tempBuffer[i].buffer); } + dev->isMounted = 0; + + if(dev->deinitialiseNAND) + dev->deinitialiseNAND(dev); } } @@ -5569,6 +7611,7 @@ int yaffs_GetNumberOfFreeChunks(yaffs_Device * dev) int nFree; int nDirtyCacheChunks; + int blocksForCheckpoint; #if 1 nFree = dev->nFreeChunks; @@ -5576,6 +7619,8 @@ int yaffs_GetNumberOfFreeChunks(yaffs_Device * dev) nFree = yaffs_CountFreeChunks(dev); #endif + nFree += dev->nDeletedFiles; + /* Now count the number of dirty chunks in the cache and subtract those */ { @@ -5589,6 +7634,13 @@ int yaffs_GetNumberOfFreeChunks(yaffs_Device * dev) nFree -= nDirtyCacheChunks; nFree -= ((dev->nReservedBlocks + 1) * dev->nChunksPerBlock); + + /* Now we figure out how much to reserve for the checkpoint and report that... */ + blocksForCheckpoint = yaffs_CalcCheckpointBlocksRequired(dev) - dev->blocksInCheckpoint; + if(blocksForCheckpoint < 0) + blocksForCheckpoint = 0; + + nFree -= (blocksForCheckpoint * dev->nChunksPerBlock); if (nFree < 0) nFree = 0; @@ -5601,9 +7653,15 @@ static int yaffs_freeVerificationFailures; static void yaffs_VerifyFreeChunks(yaffs_Device * dev) { - int counted = yaffs_CountFreeChunks(dev); + int counted; + int difference; + + if(yaffs_SkipVerification(dev)) + return; + + counted = yaffs_CountFreeChunks(dev); - int difference = dev->nFreeChunks - counted; + difference = dev->nFreeChunks - counted; if (difference) { T(YAFFS_TRACE_ALWAYS, @@ -5616,22 +7674,25 @@ static void yaffs_VerifyFreeChunks(yaffs_Device * dev) /*---------------------------------------- YAFFS test code ----------------------*/ #define yaffs_CheckStruct(structure,syze, name) \ + do { \ if(sizeof(structure) != syze) \ { \ T(YAFFS_TRACE_ALWAYS,(TSTR("%s should be %d but is %d\n" TENDSTR),\ name,syze,sizeof(structure))); \ return YAFFS_FAIL; \ - } + } \ + } while(0) 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") */ +/* 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") + yaffs_CheckStruct(yaffs_Tnode, 2 * YAFFS_NTNODES_LEVEL0, "yaffs_Tnode"); +#endif +#ifndef CONFIG_YAFFS_WINCE + yaffs_CheckStruct(yaffs_ObjectHeader, 512, "yaffs_ObjectHeader"); #endif - yaffs_CheckStruct(yaffs_ObjectHeader, 512, "yaffs_ObjectHeader") - return YAFFS_OK; }