X-Git-Url: https://git.rohieb.name/openwrt.git/blobdiff_plain/b78fbb9510cb5f9b682ffa1e59249f1c3429ea34..0723f810ee8d1c24ce7720496be4cdd988f9fb3f:/target/linux/generic-2.6/files/fs/yaffs2/yaffs_checkptrw.c diff --git a/target/linux/generic-2.6/files/fs/yaffs2/yaffs_checkptrw.c b/target/linux/generic-2.6/files/fs/yaffs2/yaffs_checkptrw.c index b265a0066..933a33fb8 100644 --- a/target/linux/generic-2.6/files/fs/yaffs2/yaffs_checkptrw.c +++ b/target/linux/generic-2.6/files/fs/yaffs2/yaffs_checkptrw.c @@ -12,7 +12,7 @@ */ const char *yaffs_checkptrw_c_version = - "$Id$"; + "$Id: yaffs_checkptrw.c,v 1.14 2007-05-15 20:07:40 charles Exp $"; #include "yaffs_checkptrw.h" @@ -22,27 +22,27 @@ static int yaffs_CheckpointSpaceOk(yaffs_Device *dev) { int blocksAvailable = dev->nErasedBlocks - dev->nReservedBlocks; - + T(YAFFS_TRACE_CHECKPOINT, (TSTR("checkpt blocks available = %d" TENDSTR), blocksAvailable)); - - + + return (blocksAvailable <= 0) ? 0 : 1; } static int yaffs_CheckpointErase(yaffs_Device *dev) { - + int i; - - if(!dev->eraseBlockInNAND) + + if(!dev->eraseBlockInNAND) return 0; T(YAFFS_TRACE_CHECKPOINT,(TSTR("checking blocks %d to %d"TENDSTR), dev->internalStartBlock,dev->internalEndBlock)); - + for(i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) { yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev,i); if(bi->blockState == YAFFS_BLOCK_STATE_CHECKPOINT){ @@ -58,9 +58,9 @@ static int yaffs_CheckpointErase(yaffs_Device *dev) } } } - + dev->blocksInCheckpoint = 0; - + return 1; } @@ -72,11 +72,11 @@ static void yaffs_CheckpointFindNextErasedBlock(yaffs_Device *dev) T(YAFFS_TRACE_CHECKPOINT, (TSTR("allocating checkpt block: erased %d reserved %d avail %d next %d "TENDSTR), dev->nErasedBlocks,dev->nReservedBlocks,blocksAvailable,dev->checkpointNextBlock)); - + if(dev->checkpointNextBlock >= 0 && dev->checkpointNextBlock <= dev->internalEndBlock && blocksAvailable > 0){ - + for(i = dev->checkpointNextBlock; i <= dev->internalEndBlock; i++){ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev,i); if(bi->blockState == YAFFS_BLOCK_STATE_EMPTY){ @@ -88,7 +88,7 @@ static void yaffs_CheckpointFindNextErasedBlock(yaffs_Device *dev) } } T(YAFFS_TRACE_CHECKPOINT,(TSTR("out of checkpt blocks"TENDSTR))); - + dev->checkpointNextBlock = -1; dev->checkpointCurrentBlock = -1; } @@ -97,19 +97,19 @@ static void yaffs_CheckpointFindNextCheckpointBlock(yaffs_Device *dev) { int i; yaffs_ExtendedTags tags; - + T(YAFFS_TRACE_CHECKPOINT,(TSTR("find next checkpt block: start: blocks %d next %d" TENDSTR), dev->blocksInCheckpoint, dev->checkpointNextBlock)); - - if(dev->blocksInCheckpoint < dev->checkpointMaxBlocks) + + if(dev->blocksInCheckpoint < dev->checkpointMaxBlocks) for(i = dev->checkpointNextBlock; i <= dev->internalEndBlock; i++){ int chunk = i * dev->nChunksPerBlock; int realignedChunk = chunk - dev->chunkOffset; dev->readChunkWithTagsFromNAND(dev,realignedChunk,NULL,&tags); - T(YAFFS_TRACE_CHECKPOINT,(TSTR("find next checkpt block: search: block %d oid %d seq %d eccr %d" TENDSTR), + T(YAFFS_TRACE_CHECKPOINT,(TSTR("find next checkpt block: search: block %d oid %d seq %d eccr %d" TENDSTR), i, tags.objectId,tags.sequenceNumber,tags.eccResult)); - + if(tags.sequenceNumber == YAFFS_SEQUENCE_CHECKPOINT_DATA){ /* Right kind of block */ dev->checkpointNextBlock = tags.objectId; @@ -130,7 +130,7 @@ static void yaffs_CheckpointFindNextCheckpointBlock(yaffs_Device *dev) int yaffs_CheckpointOpen(yaffs_Device *dev, int forWriting) { - + /* Got the functions we need? */ if (!dev->writeChunkWithTagsToNAND || !dev->readChunkWithTagsFromNAND || @@ -140,31 +140,31 @@ int yaffs_CheckpointOpen(yaffs_Device *dev, int forWriting) if(forWriting && !yaffs_CheckpointSpaceOk(dev)) return 0; - + if(!dev->checkpointBuffer) dev->checkpointBuffer = YMALLOC_DMA(dev->nDataBytesPerChunk); if(!dev->checkpointBuffer) return 0; - + dev->checkpointPageSequence = 0; - + dev->checkpointOpenForWrite = forWriting; - + dev->checkpointByteCount = 0; dev->checkpointSum = 0; dev->checkpointXor = 0; dev->checkpointCurrentBlock = -1; dev->checkpointCurrentChunk = -1; dev->checkpointNextBlock = dev->internalStartBlock; - + /* Erase all the blocks in the checkpoint area */ if(forWriting){ memset(dev->checkpointBuffer,0,dev->nDataBytesPerChunk); dev->checkpointByteOffset = 0; return yaffs_CheckpointErase(dev); - - + + } else { int i; /* Set to a value that will kick off a read */ @@ -177,7 +177,7 @@ int yaffs_CheckpointOpen(yaffs_Device *dev, int forWriting) for(i = 0; i < dev->checkpointMaxBlocks; i++) dev->checkpointBlockList[i] = -1; } - + return 1; } @@ -196,15 +196,15 @@ static int yaffs_CheckpointFlushBuffer(yaffs_Device *dev) int realignedChunk; yaffs_ExtendedTags tags; - + if(dev->checkpointCurrentBlock < 0){ yaffs_CheckpointFindNextErasedBlock(dev); dev->checkpointCurrentChunk = 0; } - + if(dev->checkpointCurrentBlock < 0) return 0; - + tags.chunkDeleted = 0; tags.objectId = dev->checkpointNextBlock; /* Hint to next place to look */ tags.chunkId = dev->checkpointPageSequence + 1; @@ -217,25 +217,25 @@ static int yaffs_CheckpointFlushBuffer(yaffs_Device *dev) bi->blockState = YAFFS_BLOCK_STATE_CHECKPOINT; dev->blocksInCheckpoint++; } - + chunk = dev->checkpointCurrentBlock * dev->nChunksPerBlock + dev->checkpointCurrentChunk; - + T(YAFFS_TRACE_CHECKPOINT,(TSTR("checkpoint wite buffer nand %d(%d:%d) objid %d chId %d" TENDSTR), - chunk, dev->checkpointCurrentBlock, dev->checkpointCurrentChunk,tags.objectId,tags.chunkId)); - + chunk, dev->checkpointCurrentBlock, dev->checkpointCurrentChunk,tags.objectId,tags.chunkId)); + realignedChunk = chunk - dev->chunkOffset; - + dev->writeChunkWithTagsToNAND(dev,realignedChunk,dev->checkpointBuffer,&tags); dev->checkpointByteOffset = 0; - dev->checkpointPageSequence++; + dev->checkpointPageSequence++; dev->checkpointCurrentChunk++; if(dev->checkpointCurrentChunk >= dev->nChunksPerBlock){ dev->checkpointCurrentChunk = 0; dev->checkpointCurrentBlock = -1; } memset(dev->checkpointBuffer,0,dev->nDataBytesPerChunk); - + return 1; } @@ -245,37 +245,37 @@ int yaffs_CheckpointWrite(yaffs_Device *dev,const void *data, int nBytes) int i=0; int ok = 1; - + __u8 * dataBytes = (__u8 *)data; - - + + if(!dev->checkpointBuffer) return 0; - + if(!dev->checkpointOpenForWrite) return -1; while(i < nBytes && ok) { - - + + dev->checkpointBuffer[dev->checkpointByteOffset] = *dataBytes ; dev->checkpointSum += *dataBytes; dev->checkpointXor ^= *dataBytes; - + dev->checkpointByteOffset++; i++; dataBytes++; dev->checkpointByteCount++; - - + + if(dev->checkpointByteOffset < 0 || - dev->checkpointByteOffset >= dev->nDataBytesPerChunk) + dev->checkpointByteOffset >= dev->nDataBytesPerChunk) ok = yaffs_CheckpointFlushBuffer(dev); } - + return i; } @@ -285,12 +285,12 @@ int yaffs_CheckpointRead(yaffs_Device *dev, void *data, int nBytes) int ok = 1; yaffs_ExtendedTags tags; - + int chunk; int realignedChunk; __u8 *dataBytes = (__u8 *)data; - + if(!dev->checkpointBuffer) return 0; @@ -298,31 +298,31 @@ int yaffs_CheckpointRead(yaffs_Device *dev, void *data, int nBytes) return -1; while(i < nBytes && ok) { - - + + if(dev->checkpointByteOffset < 0 || dev->checkpointByteOffset >= dev->nDataBytesPerChunk) { - + if(dev->checkpointCurrentBlock < 0){ yaffs_CheckpointFindNextCheckpointBlock(dev); dev->checkpointCurrentChunk = 0; } - + if(dev->checkpointCurrentBlock < 0) ok = 0; else { - - chunk = dev->checkpointCurrentBlock * dev->nChunksPerBlock + + + chunk = dev->checkpointCurrentBlock * dev->nChunksPerBlock + dev->checkpointCurrentChunk; realignedChunk = chunk - dev->chunkOffset; /* read in the next chunk */ /* printf("read checkpoint page %d\n",dev->checkpointPage); */ - dev->readChunkWithTagsFromNAND(dev, realignedChunk, + dev->readChunkWithTagsFromNAND(dev, realignedChunk, dev->checkpointBuffer, &tags); - + if(tags.chunkId != (dev->checkpointPageSequence + 1) || tags.sequenceNumber != YAFFS_SEQUENCE_CHECKPOINT_DATA) ok = 0; @@ -330,12 +330,12 @@ int yaffs_CheckpointRead(yaffs_Device *dev, void *data, int nBytes) dev->checkpointByteOffset = 0; dev->checkpointPageSequence++; dev->checkpointCurrentChunk++; - + if(dev->checkpointCurrentChunk >= dev->nChunksPerBlock) dev->checkpointCurrentBlock = -1; } } - + if(ok){ *dataBytes = dev->checkpointBuffer[dev->checkpointByteOffset]; dev->checkpointSum += *dataBytes; @@ -346,14 +346,14 @@ int yaffs_CheckpointRead(yaffs_Device *dev, void *data, int nBytes) dev->checkpointByteCount++; } } - + return i; } int yaffs_CheckpointClose(yaffs_Device *dev) { - if(dev->checkpointOpenForWrite){ + if(dev->checkpointOpenForWrite){ if(dev->checkpointByteOffset != 0) yaffs_CheckpointFlushBuffer(dev); } else { @@ -373,19 +373,19 @@ int yaffs_CheckpointClose(yaffs_Device *dev) dev->nFreeChunks -= dev->blocksInCheckpoint * dev->nChunksPerBlock; dev->nErasedBlocks -= dev->blocksInCheckpoint; - + T(YAFFS_TRACE_CHECKPOINT,(TSTR("checkpoint byte count %d" TENDSTR), dev->checkpointByteCount)); - + if(dev->checkpointBuffer){ - /* free the buffer */ + /* free the buffer */ YFREE(dev->checkpointBuffer); dev->checkpointBuffer = NULL; return 1; } else return 0; - + } int yaffs_CheckpointInvalidateStream(yaffs_Device *dev)