/*
* 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 1.19 2009-06-19 01:35:46 charles Exp $";
-
-
#include "yaffs_checkptrw.h"
#include "yaffs_getblockinfo.h"
-static int yaffs_CheckpointSpaceOk(yaffs_Device *dev)
+static int yaffs2_checkpt_space_ok(yaffs_dev_t *dev)
{
- int blocksAvailable = dev->nErasedBlocks - dev->nReservedBlocks;
+ int blocksAvailable = dev->n_erased_blocks - dev->param.n_reserved_blocks;
T(YAFFS_TRACE_CHECKPOINT,
(TSTR("checkpt blocks available = %d" TENDSTR),
}
-static int yaffs_CheckpointErase(yaffs_Device *dev)
+static int yaffs_checkpt_erase(yaffs_dev_t *dev)
{
int i;
- if (!dev->eraseBlockInNAND)
+ if (!dev->param.erase_fn)
return 0;
T(YAFFS_TRACE_CHECKPOINT, (TSTR("checking blocks %d to %d"TENDSTR),
- dev->internalStartBlock, dev->internalEndBlock));
+ dev->internal_start_block, dev->internal_end_block));
- for (i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) {
- yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, i);
- if (bi->blockState == YAFFS_BLOCK_STATE_CHECKPOINT) {
+ for (i = dev->internal_start_block; i <= dev->internal_end_block; i++) {
+ yaffs_block_info_t *bi = yaffs_get_block_info(dev, i);
+ if (bi->block_state == YAFFS_BLOCK_STATE_CHECKPOINT) {
T(YAFFS_TRACE_CHECKPOINT, (TSTR("erasing checkpt block %d"TENDSTR), i));
- if (dev->eraseBlockInNAND(dev, i - dev->blockOffset /* realign */)) {
- bi->blockState = YAFFS_BLOCK_STATE_EMPTY;
- dev->nErasedBlocks++;
- dev->nFreeChunks += dev->nChunksPerBlock;
+
+ dev->n_erasures++;
+
+ if (dev->param.erase_fn(dev, i - dev->block_offset /* realign */)) {
+ bi->block_state = YAFFS_BLOCK_STATE_EMPTY;
+ dev->n_erased_blocks++;
+ dev->n_free_chunks += dev->param.chunks_per_block;
} else {
- dev->markNANDBlockBad(dev, i);
- bi->blockState = YAFFS_BLOCK_STATE_DEAD;
+ dev->param.bad_block_fn(dev, i);
+ bi->block_state = YAFFS_BLOCK_STATE_DEAD;
}
}
}
- dev->blocksInCheckpoint = 0;
+ dev->blocks_in_checkpt = 0;
return 1;
}
-static void yaffs_CheckpointFindNextErasedBlock(yaffs_Device *dev)
+static void yaffs2_checkpt_find_erased_block(yaffs_dev_t *dev)
{
int i;
- int blocksAvailable = dev->nErasedBlocks - dev->nReservedBlocks;
+ int blocksAvailable = dev->n_erased_blocks - dev->param.n_reserved_blocks;
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->n_erased_blocks, dev->param.n_reserved_blocks, blocksAvailable, dev->checkpt_next_block));
- if (dev->checkpointNextBlock >= 0 &&
- dev->checkpointNextBlock <= dev->internalEndBlock &&
+ if (dev->checkpt_next_block >= 0 &&
+ dev->checkpt_next_block <= dev->internal_end_block &&
blocksAvailable > 0) {
- for (i = dev->checkpointNextBlock; i <= dev->internalEndBlock; i++) {
- yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, i);
- if (bi->blockState == YAFFS_BLOCK_STATE_EMPTY) {
- dev->checkpointNextBlock = i + 1;
- dev->checkpointCurrentBlock = i;
+ for (i = dev->checkpt_next_block; i <= dev->internal_end_block; i++) {
+ yaffs_block_info_t *bi = yaffs_get_block_info(dev, i);
+ if (bi->block_state == YAFFS_BLOCK_STATE_EMPTY) {
+ dev->checkpt_next_block = i + 1;
+ dev->checkpt_cur_block = i;
T(YAFFS_TRACE_CHECKPOINT, (TSTR("allocating checkpt block %d"TENDSTR), i));
return;
}
}
T(YAFFS_TRACE_CHECKPOINT, (TSTR("out of checkpt blocks"TENDSTR)));
- dev->checkpointNextBlock = -1;
- dev->checkpointCurrentBlock = -1;
+ dev->checkpt_next_block = -1;
+ dev->checkpt_cur_block = -1;
}
-static void yaffs_CheckpointFindNextCheckpointBlock(yaffs_Device *dev)
+static void yaffs2_checkpt_find_block(yaffs_dev_t *dev)
{
int i;
- yaffs_ExtendedTags tags;
+ yaffs_ext_tags tags;
T(YAFFS_TRACE_CHECKPOINT, (TSTR("find next checkpt block: start: blocks %d next %d" TENDSTR),
- dev->blocksInCheckpoint, dev->checkpointNextBlock));
+ dev->blocks_in_checkpt, dev->checkpt_next_block));
- if (dev->blocksInCheckpoint < dev->checkpointMaxBlocks)
- for (i = dev->checkpointNextBlock; i <= dev->internalEndBlock; i++) {
- int chunk = i * dev->nChunksPerBlock;
- int realignedChunk = chunk - dev->chunkOffset;
+ if (dev->blocks_in_checkpt < dev->checkpt_max_blocks)
+ for (i = dev->checkpt_next_block; i <= dev->internal_end_block; i++) {
+ int chunk = i * dev->param.chunks_per_block;
+ int realignedChunk = chunk - dev->chunk_offset;
- dev->readChunkWithTagsFromNAND(dev, realignedChunk,
+ dev->param.read_chunk_tags_fn(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));
+ i, tags.obj_id, tags.seq_number, tags.ecc_result));
- if (tags.sequenceNumber == YAFFS_SEQUENCE_CHECKPOINT_DATA) {
+ if (tags.seq_number == YAFFS_SEQUENCE_CHECKPOINT_DATA) {
/* Right kind of block */
- dev->checkpointNextBlock = tags.objectId;
- dev->checkpointCurrentBlock = i;
- dev->checkpointBlockList[dev->blocksInCheckpoint] = i;
- dev->blocksInCheckpoint++;
+ dev->checkpt_next_block = tags.obj_id;
+ dev->checkpt_cur_block = i;
+ dev->checkpt_block_list[dev->blocks_in_checkpt] = i;
+ dev->blocks_in_checkpt++;
T(YAFFS_TRACE_CHECKPOINT, (TSTR("found checkpt block %d"TENDSTR), i));
return;
}
T(YAFFS_TRACE_CHECKPOINT, (TSTR("found no more checkpt blocks"TENDSTR)));
- dev->checkpointNextBlock = -1;
- dev->checkpointCurrentBlock = -1;
+ dev->checkpt_next_block = -1;
+ dev->checkpt_cur_block = -1;
}
-int yaffs_CheckpointOpen(yaffs_Device *dev, int forWriting)
+int yaffs2_checkpt_open(yaffs_dev_t *dev, int forWriting)
{
+
+ dev->checkpt_open_write = forWriting;
+
/* Got the functions we need? */
- if (!dev->writeChunkWithTagsToNAND ||
- !dev->readChunkWithTagsFromNAND ||
- !dev->eraseBlockInNAND ||
- !dev->markNANDBlockBad)
+ if (!dev->param.write_chunk_tags_fn ||
+ !dev->param.read_chunk_tags_fn ||
+ !dev->param.erase_fn ||
+ !dev->param.bad_block_fn)
return 0;
- if (forWriting && !yaffs_CheckpointSpaceOk(dev))
+ if (forWriting && !yaffs2_checkpt_space_ok(dev))
return 0;
- if (!dev->checkpointBuffer)
- dev->checkpointBuffer = YMALLOC_DMA(dev->totalBytesPerChunk);
- if (!dev->checkpointBuffer)
+ if (!dev->checkpt_buffer)
+ dev->checkpt_buffer = YMALLOC_DMA(dev->param.total_bytes_per_chunk);
+ if (!dev->checkpt_buffer)
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;
+ dev->checkpt_page_seq = 0;
+ dev->checkpt_byte_count = 0;
+ dev->checkpt_sum = 0;
+ dev->checkpt_xor = 0;
+ dev->checkpt_cur_block = -1;
+ dev->checkpt_cur_chunk = -1;
+ dev->checkpt_next_block = dev->internal_start_block;
/* Erase all the blocks in the checkpoint area */
if (forWriting) {
- memset(dev->checkpointBuffer, 0, dev->nDataBytesPerChunk);
- dev->checkpointByteOffset = 0;
- return yaffs_CheckpointErase(dev);
+ memset(dev->checkpt_buffer, 0, dev->data_bytes_per_chunk);
+ dev->checkpt_byte_offs = 0;
+ return yaffs_checkpt_erase(dev);
} else {
int i;
/* Set to a value that will kick off a read */
- dev->checkpointByteOffset = dev->nDataBytesPerChunk;
+ dev->checkpt_byte_offs = dev->data_bytes_per_chunk;
/* A checkpoint block list of 1 checkpoint block per 16 block is (hopefully)
* going to be way more than we need */
- dev->blocksInCheckpoint = 0;
- dev->checkpointMaxBlocks = (dev->internalEndBlock - dev->internalStartBlock)/16 + 2;
- dev->checkpointBlockList = YMALLOC(sizeof(int) * dev->checkpointMaxBlocks);
- if(!dev->checkpointBlockList)
+ dev->blocks_in_checkpt = 0;
+ dev->checkpt_max_blocks = (dev->internal_end_block - dev->internal_start_block)/16 + 2;
+ dev->checkpt_block_list = YMALLOC(sizeof(int) * dev->checkpt_max_blocks);
+ if(!dev->checkpt_block_list)
return 0;
- for (i = 0; i < dev->checkpointMaxBlocks; i++)
- dev->checkpointBlockList[i] = -1;
+ for (i = 0; i < dev->checkpt_max_blocks; i++)
+ dev->checkpt_block_list[i] = -1;
}
return 1;
}
-int yaffs_GetCheckpointSum(yaffs_Device *dev, __u32 *sum)
+int yaffs2_get_checkpt_sum(yaffs_dev_t *dev, __u32 *sum)
{
__u32 compositeSum;
- compositeSum = (dev->checkpointSum << 8) | (dev->checkpointXor & 0xFF);
+ compositeSum = (dev->checkpt_sum << 8) | (dev->checkpt_xor & 0xFF);
*sum = compositeSum;
return 1;
}
-static int yaffs_CheckpointFlushBuffer(yaffs_Device *dev)
+static int yaffs2_checkpt_flush_buffer(yaffs_dev_t *dev)
{
int chunk;
int realignedChunk;
- yaffs_ExtendedTags tags;
+ yaffs_ext_tags tags;
- if (dev->checkpointCurrentBlock < 0) {
- yaffs_CheckpointFindNextErasedBlock(dev);
- dev->checkpointCurrentChunk = 0;
+ if (dev->checkpt_cur_block < 0) {
+ yaffs2_checkpt_find_erased_block(dev);
+ dev->checkpt_cur_chunk = 0;
}
- if (dev->checkpointCurrentBlock < 0)
+ if (dev->checkpt_cur_block < 0)
return 0;
- tags.chunkDeleted = 0;
- tags.objectId = dev->checkpointNextBlock; /* Hint to next place to look */
- tags.chunkId = dev->checkpointPageSequence + 1;
- tags.sequenceNumber = YAFFS_SEQUENCE_CHECKPOINT_DATA;
- tags.byteCount = dev->nDataBytesPerChunk;
- if (dev->checkpointCurrentChunk == 0) {
+ tags.is_deleted = 0;
+ tags.obj_id = dev->checkpt_next_block; /* Hint to next place to look */
+ tags.chunk_id = dev->checkpt_page_seq + 1;
+ tags.seq_number = YAFFS_SEQUENCE_CHECKPOINT_DATA;
+ tags.n_bytes = dev->data_bytes_per_chunk;
+ if (dev->checkpt_cur_chunk == 0) {
/* First chunk we write for the block? Set block state to
checkpoint */
- yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, dev->checkpointCurrentBlock);
- bi->blockState = YAFFS_BLOCK_STATE_CHECKPOINT;
- dev->blocksInCheckpoint++;
+ yaffs_block_info_t *bi = yaffs_get_block_info(dev, dev->checkpt_cur_block);
+ bi->block_state = YAFFS_BLOCK_STATE_CHECKPOINT;
+ dev->blocks_in_checkpt++;
}
- chunk = dev->checkpointCurrentBlock * dev->nChunksPerBlock + dev->checkpointCurrentChunk;
+ chunk = dev->checkpt_cur_block * dev->param.chunks_per_block + dev->checkpt_cur_chunk;
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));
-
- realignedChunk = chunk - dev->chunkOffset;
-
- dev->writeChunkWithTagsToNAND(dev, realignedChunk,
- dev->checkpointBuffer, &tags);
- dev->checkpointByteOffset = 0;
- dev->checkpointPageSequence++;
- dev->checkpointCurrentChunk++;
- if (dev->checkpointCurrentChunk >= dev->nChunksPerBlock) {
- dev->checkpointCurrentChunk = 0;
- dev->checkpointCurrentBlock = -1;
+ chunk, dev->checkpt_cur_block, dev->checkpt_cur_chunk, tags.obj_id, tags.chunk_id));
+
+ realignedChunk = chunk - dev->chunk_offset;
+
+ dev->n_page_writes++;
+
+ dev->param.write_chunk_tags_fn(dev, realignedChunk,
+ dev->checkpt_buffer, &tags);
+ dev->checkpt_byte_offs = 0;
+ dev->checkpt_page_seq++;
+ dev->checkpt_cur_chunk++;
+ if (dev->checkpt_cur_chunk >= dev->param.chunks_per_block) {
+ dev->checkpt_cur_chunk = 0;
+ dev->checkpt_cur_block = -1;
}
- memset(dev->checkpointBuffer, 0, dev->nDataBytesPerChunk);
+ memset(dev->checkpt_buffer, 0, dev->data_bytes_per_chunk);
return 1;
}
-int yaffs_CheckpointWrite(yaffs_Device *dev, const void *data, int nBytes)
+int yaffs2_checkpt_wr(yaffs_dev_t *dev, const void *data, int n_bytes)
{
int i = 0;
int ok = 1;
- if (!dev->checkpointBuffer)
+ if (!dev->checkpt_buffer)
return 0;
- if (!dev->checkpointOpenForWrite)
+ if (!dev->checkpt_open_write)
return -1;
- while (i < nBytes && ok) {
- dev->checkpointBuffer[dev->checkpointByteOffset] = *dataBytes;
- dev->checkpointSum += *dataBytes;
- dev->checkpointXor ^= *dataBytes;
+ while (i < n_bytes && ok) {
+ dev->checkpt_buffer[dev->checkpt_byte_offs] = *dataBytes;
+ dev->checkpt_sum += *dataBytes;
+ dev->checkpt_xor ^= *dataBytes;
- dev->checkpointByteOffset++;
+ dev->checkpt_byte_offs++;
i++;
dataBytes++;
- dev->checkpointByteCount++;
+ dev->checkpt_byte_count++;
- if (dev->checkpointByteOffset < 0 ||
- dev->checkpointByteOffset >= dev->nDataBytesPerChunk)
- ok = yaffs_CheckpointFlushBuffer(dev);
+ if (dev->checkpt_byte_offs < 0 ||
+ dev->checkpt_byte_offs >= dev->data_bytes_per_chunk)
+ ok = yaffs2_checkpt_flush_buffer(dev);
}
return i;
}
-int yaffs_CheckpointRead(yaffs_Device *dev, void *data, int nBytes)
+int yaffs2_checkpt_rd(yaffs_dev_t *dev, void *data, int n_bytes)
{
int i = 0;
int ok = 1;
- yaffs_ExtendedTags tags;
+ yaffs_ext_tags tags;
int chunk;
__u8 *dataBytes = (__u8 *)data;
- if (!dev->checkpointBuffer)
+ if (!dev->checkpt_buffer)
return 0;
- if (dev->checkpointOpenForWrite)
+ if (dev->checkpt_open_write)
return -1;
- while (i < nBytes && ok) {
+ while (i < n_bytes && ok) {
- if (dev->checkpointByteOffset < 0 ||
- dev->checkpointByteOffset >= dev->nDataBytesPerChunk) {
+ if (dev->checkpt_byte_offs < 0 ||
+ dev->checkpt_byte_offs >= dev->data_bytes_per_chunk) {
- if (dev->checkpointCurrentBlock < 0) {
- yaffs_CheckpointFindNextCheckpointBlock(dev);
- dev->checkpointCurrentChunk = 0;
+ if (dev->checkpt_cur_block < 0) {
+ yaffs2_checkpt_find_block(dev);
+ dev->checkpt_cur_chunk = 0;
}
- if (dev->checkpointCurrentBlock < 0)
+ if (dev->checkpt_cur_block < 0)
ok = 0;
else {
- chunk = dev->checkpointCurrentBlock *
- dev->nChunksPerBlock +
- dev->checkpointCurrentChunk;
+ chunk = dev->checkpt_cur_block *
+ dev->param.chunks_per_block +
+ dev->checkpt_cur_chunk;
- realignedChunk = chunk - dev->chunkOffset;
+ realignedChunk = chunk - dev->chunk_offset;
+
+ dev->n_page_reads++;
/* read in the next chunk */
/* printf("read checkpoint page %d\n",dev->checkpointPage); */
- dev->readChunkWithTagsFromNAND(dev,
+ dev->param.read_chunk_tags_fn(dev,
realignedChunk,
- dev->checkpointBuffer,
+ dev->checkpt_buffer,
&tags);
- if (tags.chunkId != (dev->checkpointPageSequence + 1) ||
- tags.eccResult > YAFFS_ECC_RESULT_FIXED ||
- tags.sequenceNumber != YAFFS_SEQUENCE_CHECKPOINT_DATA)
+ if (tags.chunk_id != (dev->checkpt_page_seq + 1) ||
+ tags.ecc_result > YAFFS_ECC_RESULT_FIXED ||
+ tags.seq_number != YAFFS_SEQUENCE_CHECKPOINT_DATA)
ok = 0;
- dev->checkpointByteOffset = 0;
- dev->checkpointPageSequence++;
- dev->checkpointCurrentChunk++;
+ dev->checkpt_byte_offs = 0;
+ dev->checkpt_page_seq++;
+ dev->checkpt_cur_chunk++;
- if (dev->checkpointCurrentChunk >= dev->nChunksPerBlock)
- dev->checkpointCurrentBlock = -1;
+ if (dev->checkpt_cur_chunk >= dev->param.chunks_per_block)
+ dev->checkpt_cur_block = -1;
}
}
if (ok) {
- *dataBytes = dev->checkpointBuffer[dev->checkpointByteOffset];
- dev->checkpointSum += *dataBytes;
- dev->checkpointXor ^= *dataBytes;
- dev->checkpointByteOffset++;
+ *dataBytes = dev->checkpt_buffer[dev->checkpt_byte_offs];
+ dev->checkpt_sum += *dataBytes;
+ dev->checkpt_xor ^= *dataBytes;
+ dev->checkpt_byte_offs++;
i++;
dataBytes++;
- dev->checkpointByteCount++;
+ dev->checkpt_byte_count++;
}
}
return i;
}
-int yaffs_CheckpointClose(yaffs_Device *dev)
+int yaffs_checkpt_close(yaffs_dev_t *dev)
{
- if (dev->checkpointOpenForWrite) {
- if (dev->checkpointByteOffset != 0)
- yaffs_CheckpointFlushBuffer(dev);
- } else {
+ if (dev->checkpt_open_write) {
+ if (dev->checkpt_byte_offs != 0)
+ yaffs2_checkpt_flush_buffer(dev);
+ } else if(dev->checkpt_block_list){
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)
- bi->blockState = YAFFS_BLOCK_STATE_CHECKPOINT;
+ for (i = 0; i < dev->blocks_in_checkpt && dev->checkpt_block_list[i] >= 0; i++) {
+ int blk = dev->checkpt_block_list[i];
+ yaffs_block_info_t *bi = NULL;
+ if( dev->internal_start_block <= blk && blk <= dev->internal_end_block)
+ bi = yaffs_get_block_info(dev, blk);
+ if (bi && bi->block_state == YAFFS_BLOCK_STATE_EMPTY)
+ bi->block_state = YAFFS_BLOCK_STATE_CHECKPOINT;
else {
/* Todo this looks odd... */
}
}
- YFREE(dev->checkpointBlockList);
- dev->checkpointBlockList = NULL;
+ YFREE(dev->checkpt_block_list);
+ dev->checkpt_block_list = NULL;
}
- dev->nFreeChunks -= dev->blocksInCheckpoint * dev->nChunksPerBlock;
- dev->nErasedBlocks -= dev->blocksInCheckpoint;
+ dev->n_free_chunks -= dev->blocks_in_checkpt * dev->param.chunks_per_block;
+ dev->n_erased_blocks -= dev->blocks_in_checkpt;
T(YAFFS_TRACE_CHECKPOINT, (TSTR("checkpoint byte count %d" TENDSTR),
- dev->checkpointByteCount));
+ dev->checkpt_byte_count));
- if (dev->checkpointBuffer) {
+ if (dev->checkpt_buffer) {
/* free the buffer */
- YFREE(dev->checkpointBuffer);
- dev->checkpointBuffer = NULL;
+ YFREE(dev->checkpt_buffer);
+ dev->checkpt_buffer = NULL;
return 1;
} else
return 0;
}
-int yaffs_CheckpointInvalidateStream(yaffs_Device *dev)
+int yaffs2_checkpt_invalidate_stream(yaffs_dev_t *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->blocks_in_checkpt));
- return yaffs_CheckpointErase(dev);
+ return yaffs_checkpt_erase(dev);
}
projects / yaffs2.git / blobdiff