/*
* YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
*
- * Copyright (C) 2002-2007 Aleph One Ltd.
+ * Copyright (C) 2002-2010 Aleph One Ltd.
* for Toby Churchill Ltd and Brightstar Engineering
*
* Created by Charles Manning <charles@aleph1.co.uk>
* published by the Free Software Foundation.
*/
-const char *yaffs_checkptrw_c_version =
- "$Id: yaffs_checkptrw.c,v 1.18 2009-03-06 17:20:49 wookey Exp $";
-
-
#include "yaffs_checkptrw.h"
#include "yaffs_getblockinfo.h"
-static int yaffs_CheckpointSpaceOk(yaffs_Device *dev)
+static int yaffs2_CheckpointSpaceOk(yaffs_Device *dev)
{
- int blocksAvailable = dev->nErasedBlocks - dev->nReservedBlocks;
+ int blocksAvailable = dev->nErasedBlocks - dev->param.nReservedBlocks;
T(YAFFS_TRACE_CHECKPOINT,
(TSTR("checkpt blocks available = %d" TENDSTR),
}
-static int yaffs_CheckpointErase(yaffs_Device *dev)
+static int yaffs2_CheckpointErase(yaffs_Device *dev)
{
int i;
- if (!dev->eraseBlockInNAND)
+ if (!dev->param.eraseBlockInNAND)
return 0;
T(YAFFS_TRACE_CHECKPOINT, (TSTR("checking blocks %d to %d"TENDSTR),
dev->internalStartBlock, dev->internalEndBlock));
yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, i);
if (bi->blockState == YAFFS_BLOCK_STATE_CHECKPOINT) {
T(YAFFS_TRACE_CHECKPOINT, (TSTR("erasing checkpt block %d"TENDSTR), i));
- if (dev->eraseBlockInNAND(dev, i - dev->blockOffset /* realign */)) {
+
+ dev->nBlockErasures++;
+
+ if (dev->param.eraseBlockInNAND(dev, i - dev->blockOffset /* realign */)) {
bi->blockState = YAFFS_BLOCK_STATE_EMPTY;
dev->nErasedBlocks++;
- dev->nFreeChunks += dev->nChunksPerBlock;
+ dev->nFreeChunks += dev->param.nChunksPerBlock;
} else {
- dev->markNANDBlockBad(dev, i);
+ dev->param.markNANDBlockBad(dev, i);
bi->blockState = YAFFS_BLOCK_STATE_DEAD;
}
}
}
-static void yaffs_CheckpointFindNextErasedBlock(yaffs_Device *dev)
+static void yaffs2_CheckpointFindNextErasedBlock(yaffs_Device *dev)
{
int i;
- int blocksAvailable = dev->nErasedBlocks - dev->nReservedBlocks;
+ int blocksAvailable = dev->nErasedBlocks - dev->param.nReservedBlocks;
T(YAFFS_TRACE_CHECKPOINT,
(TSTR("allocating checkpt block: erased %d reserved %d avail %d next %d "TENDSTR),
- dev->nErasedBlocks, dev->nReservedBlocks, blocksAvailable, dev->checkpointNextBlock));
+ dev->nErasedBlocks, dev->param.nReservedBlocks, blocksAvailable, dev->checkpointNextBlock));
if (dev->checkpointNextBlock >= 0 &&
dev->checkpointNextBlock <= dev->internalEndBlock &&
dev->checkpointCurrentBlock = -1;
}
-static void yaffs_CheckpointFindNextCheckpointBlock(yaffs_Device *dev)
+static void yaffs2_CheckpointFindNextCheckpointBlock(yaffs_Device *dev)
{
int i;
yaffs_ExtendedTags tags;
if (dev->blocksInCheckpoint < dev->checkpointMaxBlocks)
for (i = dev->checkpointNextBlock; i <= dev->internalEndBlock; i++) {
- int chunk = i * dev->nChunksPerBlock;
+ int chunk = i * dev->param.nChunksPerBlock;
int realignedChunk = chunk - dev->chunkOffset;
- dev->readChunkWithTagsFromNAND(dev, realignedChunk,
+ dev->param.readChunkWithTagsFromNAND(dev, realignedChunk,
NULL, &tags);
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));
}
-int yaffs_CheckpointOpen(yaffs_Device *dev, int forWriting)
+int yaffs2_CheckpointOpen(yaffs_Device *dev, int forWriting)
{
+
+ dev->checkpointOpenForWrite = forWriting;
+
/* Got the functions we need? */
- if (!dev->writeChunkWithTagsToNAND ||
- !dev->readChunkWithTagsFromNAND ||
- !dev->eraseBlockInNAND ||
- !dev->markNANDBlockBad)
+ if (!dev->param.writeChunkWithTagsToNAND ||
+ !dev->param.readChunkWithTagsFromNAND ||
+ !dev->param.eraseBlockInNAND ||
+ !dev->param.markNANDBlockBad)
return 0;
- if (forWriting && !yaffs_CheckpointSpaceOk(dev))
+ if (forWriting && !yaffs2_CheckpointSpaceOk(dev))
return 0;
if (!dev->checkpointBuffer)
- dev->checkpointBuffer = YMALLOC_DMA(dev->totalBytesPerChunk);
+ dev->checkpointBuffer = YMALLOC_DMA(dev->param.totalBytesPerChunk);
if (!dev->checkpointBuffer)
return 0;
dev->checkpointPageSequence = 0;
-
- dev->checkpointOpenForWrite = forWriting;
-
dev->checkpointByteCount = 0;
dev->checkpointSum = 0;
dev->checkpointXor = 0;
if (forWriting) {
memset(dev->checkpointBuffer, 0, dev->nDataBytesPerChunk);
dev->checkpointByteOffset = 0;
- return yaffs_CheckpointErase(dev);
+ return yaffs2_CheckpointErase(dev);
} else {
int i;
/* Set to a value that will kick off a read */
dev->blocksInCheckpoint = 0;
dev->checkpointMaxBlocks = (dev->internalEndBlock - dev->internalStartBlock)/16 + 2;
dev->checkpointBlockList = YMALLOC(sizeof(int) * dev->checkpointMaxBlocks);
+ if(!dev->checkpointBlockList)
+ return 0;
+
for (i = 0; i < dev->checkpointMaxBlocks; i++)
dev->checkpointBlockList[i] = -1;
}
return 1;
}
-int yaffs_GetCheckpointSum(yaffs_Device *dev, __u32 *sum)
+int yaffs2_GetCheckpointSum(yaffs_Device *dev, __u32 *sum)
{
__u32 compositeSum;
compositeSum = (dev->checkpointSum << 8) | (dev->checkpointXor & 0xFF);
return 1;
}
-static int yaffs_CheckpointFlushBuffer(yaffs_Device *dev)
+static int yaffs2_CheckpointFlushBuffer(yaffs_Device *dev)
{
int chunk;
int realignedChunk;
yaffs_ExtendedTags tags;
if (dev->checkpointCurrentBlock < 0) {
- yaffs_CheckpointFindNextErasedBlock(dev);
+ yaffs2_CheckpointFindNextErasedBlock(dev);
dev->checkpointCurrentChunk = 0;
}
dev->blocksInCheckpoint++;
}
- chunk = dev->checkpointCurrentBlock * dev->nChunksPerBlock + dev->checkpointCurrentChunk;
+ chunk = dev->checkpointCurrentBlock * dev->param.nChunksPerBlock + dev->checkpointCurrentChunk;
T(YAFFS_TRACE_CHECKPOINT, (TSTR("checkpoint wite buffer nand %d(%d:%d) objid %d chId %d" TENDSTR),
realignedChunk = chunk - dev->chunkOffset;
- dev->writeChunkWithTagsToNAND(dev, realignedChunk,
+ dev->nPageWrites++;
+
+ dev->param.writeChunkWithTagsToNAND(dev, realignedChunk,
dev->checkpointBuffer, &tags);
dev->checkpointByteOffset = 0;
dev->checkpointPageSequence++;
dev->checkpointCurrentChunk++;
- if (dev->checkpointCurrentChunk >= dev->nChunksPerBlock) {
+ if (dev->checkpointCurrentChunk >= dev->param.nChunksPerBlock) {
dev->checkpointCurrentChunk = 0;
dev->checkpointCurrentBlock = -1;
}
}
-int yaffs_CheckpointWrite(yaffs_Device *dev, const void *data, int nBytes)
+int yaffs2_CheckpointWrite(yaffs_Device *dev, const void *data, int nBytes)
{
int i = 0;
int ok = 1;
if (dev->checkpointByteOffset < 0 ||
dev->checkpointByteOffset >= dev->nDataBytesPerChunk)
- ok = yaffs_CheckpointFlushBuffer(dev);
+ ok = yaffs2_CheckpointFlushBuffer(dev);
}
return i;
}
-int yaffs_CheckpointRead(yaffs_Device *dev, void *data, int nBytes)
+int yaffs2_CheckpointRead(yaffs_Device *dev, void *data, int nBytes)
{
int i = 0;
int ok = 1;
dev->checkpointByteOffset >= dev->nDataBytesPerChunk) {
if (dev->checkpointCurrentBlock < 0) {
- yaffs_CheckpointFindNextCheckpointBlock(dev);
+ yaffs2_CheckpointFindNextCheckpointBlock(dev);
dev->checkpointCurrentChunk = 0;
}
ok = 0;
else {
chunk = dev->checkpointCurrentBlock *
- dev->nChunksPerBlock +
+ dev->param.nChunksPerBlock +
dev->checkpointCurrentChunk;
realignedChunk = chunk - dev->chunkOffset;
+
+ dev->nPageReads++;
/* read in the next chunk */
/* printf("read checkpoint page %d\n",dev->checkpointPage); */
- dev->readChunkWithTagsFromNAND(dev,
+ dev->param.readChunkWithTagsFromNAND(dev,
realignedChunk,
dev->checkpointBuffer,
&tags);
dev->checkpointPageSequence++;
dev->checkpointCurrentChunk++;
- if (dev->checkpointCurrentChunk >= dev->nChunksPerBlock)
+ if (dev->checkpointCurrentChunk >= dev->param.nChunksPerBlock)
dev->checkpointCurrentBlock = -1;
}
}
return i;
}
-int yaffs_CheckpointClose(yaffs_Device *dev)
+int yaffs2_CheckpointClose(yaffs_Device *dev)
{
if (dev->checkpointOpenForWrite) {
if (dev->checkpointByteOffset != 0)
- yaffs_CheckpointFlushBuffer(dev);
- } else {
+ yaffs2_CheckpointFlushBuffer(dev);
+ } else if(dev->checkpointBlockList){
int i;
for (i = 0; i < dev->blocksInCheckpoint && dev->checkpointBlockList[i] >= 0; i++) {
- yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, dev->checkpointBlockList[i]);
- if (bi->blockState == YAFFS_BLOCK_STATE_EMPTY)
+ int blk = dev->checkpointBlockList[i];
+ yaffs_BlockInfo *bi = NULL;
+ if( dev->internalStartBlock <= blk && blk <= dev->internalEndBlock)
+ bi = yaffs_GetBlockInfo(dev, blk);
+ if (bi && bi->blockState == YAFFS_BLOCK_STATE_EMPTY)
bi->blockState = YAFFS_BLOCK_STATE_CHECKPOINT;
else {
/* Todo this looks odd... */
dev->checkpointBlockList = NULL;
}
- dev->nFreeChunks -= dev->blocksInCheckpoint * dev->nChunksPerBlock;
+ dev->nFreeChunks -= dev->blocksInCheckpoint * dev->param.nChunksPerBlock;
dev->nErasedBlocks -= dev->blocksInCheckpoint;
return 0;
}
-int yaffs_CheckpointInvalidateStream(yaffs_Device *dev)
+int yaffs2_CheckpointInvalidateStream(yaffs_Device *dev)
{
- /* Erase the first checksum block */
-
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("checkpoint invalidate"TENDSTR)));
+ /* Erase the checkpoint data */
- if (!yaffs_CheckpointSpaceOk(dev))
- return 0;
+ T(YAFFS_TRACE_CHECKPOINT, (TSTR("checkpoint invalidate of %d blocks"TENDSTR),
+ dev->blocksInCheckpoint));
- return yaffs_CheckpointErase(dev);
+ return yaffs2_CheckpointErase(dev);
}