/*
* YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
*
- * Copyright (C) 2002-2010 Aleph One Ltd.
+ * Copyright (C) 2002-2011 Aleph One Ltd.
* for Toby Churchill Ltd and Brightstar Engineering
*
* Created by Charles Manning <charles@aleph1.co.uk>
#include "yaffs_checkptrw.h"
#include "yaffs_getblockinfo.h"
+struct yaffs_checkpt_chunk_hdr {
+ int version;
+ int seq;
+ u32 sum;
+ u32 xor;
+} ;
+
+
+static int apply_chunk_offset(struct yaffs_dev *dev, int chunk)
+{
+ return chunk - dev->chunk_offset;
+}
+
+static int apply_block_offset(struct yaffs_dev *dev, int block)
+{
+ return block - dev->block_offset;
+}
+
+static void yaffs2_checkpt_init_chunk_hdr(struct yaffs_dev *dev)
+{
+ struct yaffs_checkpt_chunk_hdr hdr;
+
+ hdr.version = YAFFS_CHECKPOINT_VERSION;
+ hdr.seq = dev->checkpt_page_seq;
+ hdr.sum = dev->checkpt_sum;
+ hdr.xor = dev->checkpt_xor;
+
+ dev->checkpt_byte_offs = sizeof(hdr);
+
+ memcpy(dev->checkpt_buffer, &hdr, sizeof(hdr));
+}
+
+static int yaffs2_checkpt_check_chunk_hdr(struct yaffs_dev *dev)
+{
+ struct yaffs_checkpt_chunk_hdr hdr;
+
+ memcpy(&hdr, dev->checkpt_buffer, sizeof(hdr));
+
+ dev->checkpt_byte_offs = sizeof(hdr);
+
+ return hdr.version == YAFFS_CHECKPOINT_VERSION &&
+ hdr.seq == dev->checkpt_page_seq &&
+ hdr.sum == dev->checkpt_sum &&
+ hdr.xor == dev->checkpt_xor;
+}
+
static int yaffs2_checkpt_space_ok(struct yaffs_dev *dev)
{
int blocks_avail = dev->n_erased_blocks - dev->param.n_reserved_blocks;
- T(YAFFS_TRACE_CHECKPOINT,
- (TSTR("checkpt blocks available = %d" TENDSTR),
- blocks_avail));
+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
+ "checkpt blocks_avail = %d", blocks_avail);
return (blocks_avail <= 0) ? 0 : 1;
}
-
static int yaffs_checkpt_erase(struct yaffs_dev *dev)
{
int i;
- if (!dev->param.erase_fn)
+ if (!dev->drv.drv_erase_fn)
return 0;
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("checking blocks %d to %d"TENDSTR),
- dev->internal_start_block, dev->internal_end_block));
+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
+ "checking blocks %d to %d",
+ dev->internal_start_block, dev->internal_end_block);
for (i = dev->internal_start_block; i <= dev->internal_end_block; i++) {
- yaffs_block_info_t *bi = yaffs_get_block_info(dev, i);
+ struct yaffs_block_info *bi = yaffs_get_block_info(dev, i);
+ int offset_i = apply_block_offset(dev, i);
+ int result;
+
if (bi->block_state == YAFFS_BLOCK_STATE_CHECKPOINT) {
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("erasing checkpt block %d"TENDSTR), i));
+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
+ "erasing checkpt block %d", i);
dev->n_erasures++;
- if (dev->param.erase_fn(dev, i - dev->block_offset /* realign */)) {
+ result = dev->drv.drv_erase_fn(dev, offset_i);
+ if(result) {
bi->block_state = YAFFS_BLOCK_STATE_EMPTY;
dev->n_erased_blocks++;
- dev->n_free_chunks += dev->param.chunks_per_block;
+ dev->n_free_chunks +=
+ dev->param.chunks_per_block;
} else {
- dev->param.bad_block_fn(dev, i);
+ dev->drv.drv_mark_bad_fn(dev, offset_i);
bi->block_state = YAFFS_BLOCK_STATE_DEAD;
}
}
return 1;
}
-
static void yaffs2_checkpt_find_erased_block(struct yaffs_dev *dev)
{
- int i;
+ int i;
int blocks_avail = 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->n_erased_blocks, dev->param.n_reserved_blocks, blocks_avail, dev->checkpt_next_block));
+
+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
+ "allocating checkpt block: erased %d reserved %d avail %d next %d ",
+ dev->n_erased_blocks, dev->param.n_reserved_blocks,
+ blocks_avail, dev->checkpt_next_block);
if (dev->checkpt_next_block >= 0 &&
- dev->checkpt_next_block <= dev->internal_end_block &&
- blocks_avail > 0) {
+ dev->checkpt_next_block <= dev->internal_end_block &&
+ blocks_avail > 0) {
- for (i = dev->checkpt_next_block; i <= dev->internal_end_block; i++) {
- yaffs_block_info_t *bi = yaffs_get_block_info(dev, i);
+ for (i = dev->checkpt_next_block; i <= dev->internal_end_block;
+ i++) {
+ struct yaffs_block_info *bi;
+
+ 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));
+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
+ "allocating checkpt block %d", i);
return;
}
}
}
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("out of checkpt blocks"TENDSTR)));
+ yaffs_trace(YAFFS_TRACE_CHECKPOINT, "out of checkpt blocks");
dev->checkpt_next_block = -1;
dev->checkpt_cur_block = -1;
static void yaffs2_checkpt_find_block(struct yaffs_dev *dev)
{
- int i;
+ int i;
struct yaffs_ext_tags tags;
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("find next checkpt block: start: blocks %d next %d" TENDSTR),
- dev->blocks_in_checkpt, dev->checkpt_next_block));
+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
+ "find next checkpt block: start: blocks %d next %d",
+ dev->blocks_in_checkpt, dev->checkpt_next_block);
if (dev->blocks_in_checkpt < dev->checkpt_max_blocks)
- for (i = dev->checkpt_next_block; i <= dev->internal_end_block; i++) {
+ for (i = dev->checkpt_next_block; i <= dev->internal_end_block;
+ i++) {
int chunk = i * dev->param.chunks_per_block;
- int realigned_chunk = chunk - dev->chunk_offset;
+ enum yaffs_block_state state;
+ u32 seq;
- dev->param.read_chunk_tags_fn(dev, realigned_chunk,
+ dev->tagger.read_chunk_tags_fn(dev,
+ apply_chunk_offset(dev, chunk),
NULL, &tags);
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("find next checkpt block: search: block %d oid %d seq %d eccr %d" TENDSTR),
- i, tags.obj_id, tags.seq_number, tags.ecc_result));
-
- if (tags.seq_number == YAFFS_SEQUENCE_CHECKPOINT_DATA) {
- /* Right kind of block */
- 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;
- }
+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
+ "find next checkpt block: search: block %d state %d oid %d seq %d eccr %d",
+ i, (int) state,
+ tags.obj_id, tags.seq_number,
+ tags.ecc_result);
+
+ if (tags.seq_number != YAFFS_SEQUENCE_CHECKPOINT_DATA)
+ continue;
+
+ dev->tagger.query_block_fn(dev,
+ apply_block_offset(dev, i),
+ &state, &seq);
+ if (state == YAFFS_BLOCK_STATE_DEAD)
+ continue;
+
+ /* Right kind of block */
+ 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++;
+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
+ "found checkpt block %d", i);
+ return;
}
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("found no more checkpt blocks"TENDSTR)));
+ yaffs_trace(YAFFS_TRACE_CHECKPOINT, "found no more checkpt blocks");
dev->checkpt_next_block = -1;
dev->checkpt_cur_block = -1;
}
-
int yaffs2_checkpt_open(struct yaffs_dev *dev, int writing)
{
-
+ int i;
dev->checkpt_open_write = writing;
/* Got the functions we need? */
- if (!dev->param.write_chunk_tags_fn ||
- !dev->param.read_chunk_tags_fn ||
- !dev->param.erase_fn ||
- !dev->param.bad_block_fn)
+ if (!dev->tagger.write_chunk_tags_fn ||
+ !dev->tagger.read_chunk_tags_fn ||
+ !dev->drv.drv_erase_fn ||
+ !dev->drv.drv_mark_bad_fn)
return 0;
if (writing && !yaffs2_checkpt_space_ok(dev))
return 0;
if (!dev->checkpt_buffer)
- dev->checkpt_buffer = YMALLOC_DMA(dev->param.total_bytes_per_chunk);
+ dev->checkpt_buffer =
+ kmalloc(dev->param.total_bytes_per_chunk, GFP_NOFS);
if (!dev->checkpt_buffer)
return 0;
-
dev->checkpt_page_seq = 0;
dev->checkpt_byte_count = 0;
dev->checkpt_sum = 0;
dev->checkpt_cur_chunk = -1;
dev->checkpt_next_block = dev->internal_start_block;
- /* Erase all the blocks in the checkpoint area */
if (writing) {
memset(dev->checkpt_buffer, 0, dev->data_bytes_per_chunk);
- dev->checkpt_byte_offs = 0;
+ yaffs2_checkpt_init_chunk_hdr(dev);
return yaffs_checkpt_erase(dev);
- } else {
- int i;
- /* Set to a value that will kick off a read */
- 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->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->checkpt_max_blocks; i++)
- dev->checkpt_block_list[i] = -1;
}
+ /* Opening for a read */
+ /* Set to a value that will kick off a read */
+ 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->blocks_in_checkpt = 0;
+ dev->checkpt_max_blocks =
+ (dev->internal_end_block - dev->internal_start_block) / 16 + 2;
+ if (!dev->checkpt_block_list)
+ dev->checkpt_block_list =
+ kmalloc(sizeof(int) * dev->checkpt_max_blocks, GFP_NOFS);
+
+ if (!dev->checkpt_block_list)
+ return 0;
+
+ for (i = 0; i < dev->checkpt_max_blocks; i++)
+ dev->checkpt_block_list[i] = -1;
+
return 1;
}
-int yaffs2_get_checkpt_sum(struct yaffs_dev *dev, u32 *sum)
+int yaffs2_get_checkpt_sum(struct yaffs_dev *dev, u32 * sum)
{
u32 composite_sum;
- composite_sum = (dev->checkpt_sum << 8) | (dev->checkpt_xor & 0xFF);
+
+ composite_sum = (dev->checkpt_sum << 8) | (dev->checkpt_xor & 0xff);
*sum = composite_sum;
return 1;
}
static int yaffs2_checkpt_flush_buffer(struct yaffs_dev *dev)
{
int chunk;
- int realigned_chunk;
-
+ int offset_chunk;
struct yaffs_ext_tags tags;
if (dev->checkpt_cur_block < 0) {
return 0;
tags.is_deleted = 0;
- tags.obj_id = dev->checkpt_next_block; /* Hint to next place to look */
+ 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.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_block_info_t *bi = yaffs_get_block_info(dev, dev->checkpt_cur_block);
+ struct yaffs_block_info *bi =
+ yaffs_get_block_info(dev, dev->checkpt_cur_block);
bi->block_state = YAFFS_BLOCK_STATE_CHECKPOINT;
dev->blocks_in_checkpt++;
}
- chunk = dev->checkpt_cur_block * dev->param.chunks_per_block + dev->checkpt_cur_chunk;
+ chunk =
+ dev->checkpt_cur_block * dev->param.chunks_per_block +
+ dev->checkpt_cur_chunk;
+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
+ "checkpoint wite buffer nand %d(%d:%d) objid %d chId %d",
+ chunk, dev->checkpt_cur_block, dev->checkpt_cur_chunk,
+ tags.obj_id, tags.chunk_id);
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("checkpoint wite buffer nand %d(%d:%d) objid %d chId %d" TENDSTR),
- chunk, dev->checkpt_cur_block, dev->checkpt_cur_chunk, tags.obj_id, tags.chunk_id));
-
- realigned_chunk = chunk - dev->chunk_offset;
+ offset_chunk = apply_chunk_offset(dev, chunk);
dev->n_page_writes++;
- dev->param.write_chunk_tags_fn(dev, realigned_chunk,
- dev->checkpt_buffer, &tags);
- dev->checkpt_byte_offs = 0;
+ dev->tagger.write_chunk_tags_fn(dev, offset_chunk,
+ dev->checkpt_buffer, &tags);
dev->checkpt_page_seq++;
dev->checkpt_cur_chunk++;
if (dev->checkpt_cur_chunk >= dev->param.chunks_per_block) {
}
memset(dev->checkpt_buffer, 0, dev->data_bytes_per_chunk);
+ yaffs2_checkpt_init_chunk_hdr(dev);
+
+
return 1;
}
-
int yaffs2_checkpt_wr(struct yaffs_dev *dev, const void *data, int n_bytes)
{
int i = 0;
int ok = 1;
-
-
- u8 * data_bytes = (u8 *)data;
-
-
+ u8 *data_bytes = (u8 *) data;
if (!dev->checkpt_buffer)
return 0;
data_bytes++;
dev->checkpt_byte_count++;
-
if (dev->checkpt_byte_offs < 0 ||
- dev->checkpt_byte_offs >= dev->data_bytes_per_chunk)
+ dev->checkpt_byte_offs >= dev->data_bytes_per_chunk)
ok = yaffs2_checkpt_flush_buffer(dev);
}
int yaffs2_checkpt_rd(struct yaffs_dev *dev, void *data, int n_bytes)
{
int i = 0;
- int ok = 1;
struct yaffs_ext_tags tags;
-
-
int chunk;
- int realigned_chunk;
-
- u8 *data_bytes = (u8 *)data;
+ int offset_chunk;
+ u8 *data_bytes = (u8 *) data;
if (!dev->checkpt_buffer)
return 0;
if (dev->checkpt_open_write)
return -1;
- while (i < n_bytes && ok) {
-
+ while (i < n_bytes) {
if (dev->checkpt_byte_offs < 0 ||
- dev->checkpt_byte_offs >= dev->data_bytes_per_chunk) {
+ dev->checkpt_byte_offs >= dev->data_bytes_per_chunk) {
if (dev->checkpt_cur_block < 0) {
yaffs2_checkpt_find_block(dev);
dev->checkpt_cur_chunk = 0;
}
+ /* Bail out if we can't find a checpoint block */
if (dev->checkpt_cur_block < 0)
- ok = 0;
- else {
- chunk = dev->checkpt_cur_block *
- dev->param.chunks_per_block +
- dev->checkpt_cur_chunk;
-
- realigned_chunk = chunk - dev->chunk_offset;
-
- dev->n_page_reads++;
-
- /* read in the next chunk */
- dev->param.read_chunk_tags_fn(dev,
- realigned_chunk,
+ break;
+
+ chunk = dev->checkpt_cur_block *
+ dev->param.chunks_per_block +
+ dev->checkpt_cur_chunk;
+
+ offset_chunk = apply_chunk_offset(dev, chunk);
+ dev->n_page_reads++;
+
+ /* Read in the next chunk */
+ dev->tagger.read_chunk_tags_fn(dev,
+ offset_chunk,
dev->checkpt_buffer,
&tags);
- 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;
+ /* Bail out if the chunk is corrupted. */
+ if (tags.chunk_id != (dev->checkpt_page_seq + 1) ||
+ tags.ecc_result > YAFFS_ECC_RESULT_FIXED ||
+ tags.seq_number != YAFFS_SEQUENCE_CHECKPOINT_DATA)
+ break;
- dev->checkpt_byte_offs = 0;
- dev->checkpt_page_seq++;
- dev->checkpt_cur_chunk++;
+ /* Bail out if it is not a checkpoint chunk. */
+ if(!yaffs2_checkpt_check_chunk_hdr(dev))
+ break;
- if (dev->checkpt_cur_chunk >= dev->param.chunks_per_block)
- dev->checkpt_cur_block = -1;
- }
- }
+ dev->checkpt_page_seq++;
+ dev->checkpt_cur_chunk++;
+
+ if (dev->checkpt_cur_chunk >=
+ dev->param.chunks_per_block)
+ dev->checkpt_cur_block = -1;
- if (ok) {
- *data_bytes = dev->checkpt_buffer[dev->checkpt_byte_offs];
- dev->checkpt_sum += *data_bytes;
- dev->checkpt_xor ^= *data_bytes;
- dev->checkpt_byte_offs++;
- i++;
- data_bytes++;
- dev->checkpt_byte_count++;
}
+
+ *data_bytes = dev->checkpt_buffer[dev->checkpt_byte_offs];
+ dev->checkpt_sum += *data_bytes;
+ dev->checkpt_xor ^= *data_bytes;
+ dev->checkpt_byte_offs++;
+ i++;
+ data_bytes++;
+ dev->checkpt_byte_count++;
}
- return i;
+ return i; /* Number of bytes read */
}
int yaffs_checkpt_close(struct yaffs_dev *dev)
{
+ int i;
if (dev->checkpt_open_write) {
- if (dev->checkpt_byte_offs != 0)
+ if (dev->checkpt_byte_offs !=
+ sizeof(sizeof(struct yaffs_checkpt_chunk_hdr)))
yaffs2_checkpt_flush_buffer(dev);
- } else if(dev->checkpt_block_list){
- int i;
- for (i = 0; i < dev->blocks_in_checkpt && dev->checkpt_block_list[i] >= 0; i++) {
+ } else if (dev->checkpt_block_list) {
+ 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)
+ struct yaffs_block_info *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->checkpt_block_list);
- dev->checkpt_block_list = NULL;
}
- dev->n_free_chunks -= dev->blocks_in_checkpt * dev->param.chunks_per_block;
+ dev->n_free_chunks -=
+ dev->blocks_in_checkpt * dev->param.chunks_per_block;
dev->n_erased_blocks -= dev->blocks_in_checkpt;
+ yaffs_trace(YAFFS_TRACE_CHECKPOINT, "checkpoint byte count %d",
+ dev->checkpt_byte_count);
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("checkpoint byte count %d" TENDSTR),
- dev->checkpt_byte_count));
-
- if (dev->checkpt_buffer) {
- /* free the buffer */
- YFREE(dev->checkpt_buffer);
- dev->checkpt_buffer = NULL;
+ if (dev->checkpt_buffer)
return 1;
- } else
+ else
return 0;
}
{
/* Erase the checkpoint data */
- T(YAFFS_TRACE_CHECKPOINT, (TSTR("checkpoint invalidate of %d blocks"TENDSTR),
- dev->blocks_in_checkpt));
+ yaffs_trace(YAFFS_TRACE_CHECKPOINT,
+ "checkpoint invalidate of %d blocks",
+ dev->blocks_in_checkpt);
return yaffs_checkpt_erase(dev);
}
-
-
-
projects / yaffs2.git / blobdiff