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Diffstat (limited to 'yaffs_yaffs2.c')
-rw-r--r--yaffs_yaffs2.c225
1 files changed, 113 insertions, 112 deletions
diff --git a/yaffs_yaffs2.c b/yaffs_yaffs2.c
index 58c3600..76623ad 100644
--- a/yaffs_yaffs2.c
+++ b/yaffs_yaffs2.c
@@ -145,7 +145,7 @@ __u32 yaffs2_find_refresh_block(yaffs_dev_t *dev)
__u32 b ;
__u32 oldest = 0;
- __u32 oldestSequence = 0;
+ __u32 oldest_seq = 0;
yaffs_block_info_t *bi;
@@ -180,9 +180,9 @@ __u32 yaffs2_find_refresh_block(yaffs_dev_t *dev)
if (bi->block_state == YAFFS_BLOCK_STATE_FULL){
if(oldest < 1 ||
- bi->seq_number < oldestSequence){
+ bi->seq_number < oldest_seq){
oldest = b;
- oldestSequence = bi->seq_number;
+ oldest_seq = bi->seq_number;
}
}
bi++;
@@ -191,7 +191,7 @@ __u32 yaffs2_find_refresh_block(yaffs_dev_t *dev)
if (oldest > 0) {
T(YAFFS_TRACE_GC,
(TSTR("GC refresh count %d selected block %d with seq_number %d" TENDSTR),
- dev->refresh_count, oldest, oldestSequence));
+ dev->refresh_count, oldest, oldest_seq));
}
return oldest;
@@ -222,13 +222,13 @@ int yaffs_calc_checkpt_blocks_required(yaffs_dev_t *dev)
yaffs2_checkpt_required(dev)){
/* Not a valid value so recalculate */
int n_bytes = 0;
- int nBlocks;
- int devBlocks = (dev->param.end_block - dev->param.start_block + 1);
+ int n_blocks;
+ int dev_blocks = (dev->param.end_block - dev->param.start_block + 1);
n_bytes += sizeof(yaffs_checkpt_validty_t);
n_bytes += sizeof(yaffs_checkpt_dev_t);
- n_bytes += devBlocks * sizeof(yaffs_block_info_t);
- n_bytes += devBlocks * dev->chunk_bit_stride;
+ n_bytes += dev_blocks * sizeof(yaffs_block_info_t);
+ n_bytes += dev_blocks * dev->chunk_bit_stride;
n_bytes += (sizeof(yaffs_checkpt_obj_t) + sizeof(__u32)) * (dev->n_obj);
n_bytes += (dev->tnode_size + sizeof(__u32)) * (dev->n_tnodes);
n_bytes += sizeof(yaffs_checkpt_validty_t);
@@ -236,9 +236,9 @@ int yaffs_calc_checkpt_blocks_required(yaffs_dev_t *dev)
/* Round up and add 2 blocks to allow for some bad blocks, so add 3 */
- nBlocks = (n_bytes/(dev->data_bytes_per_chunk * dev->param.chunks_per_block)) + 3;
+ n_blocks = (n_bytes/(dev->data_bytes_per_chunk * dev->param.chunks_per_block)) + 3;
- dev->checkpoint_blocks_required = nBlocks;
+ dev->checkpoint_blocks_required = n_blocks;
}
retval = dev->checkpoint_blocks_required - dev->blocks_in_checkpt;
@@ -314,7 +314,7 @@ static int yaffs2_wr_checkpt_dev(yaffs_dev_t *dev)
{
yaffs_checkpt_dev_t cp;
__u32 n_bytes;
- __u32 nBlocks = (dev->internal_end_block - dev->internal_start_block + 1);
+ __u32 n_blocks = (dev->internal_end_block - dev->internal_start_block + 1);
int ok;
@@ -326,13 +326,13 @@ static int yaffs2_wr_checkpt_dev(yaffs_dev_t *dev)
/* Write block info */
if (ok) {
- n_bytes = nBlocks * sizeof(yaffs_block_info_t);
+ n_bytes = n_blocks * sizeof(yaffs_block_info_t);
ok = (yaffs2_checkpt_wr(dev, dev->block_info, n_bytes) == n_bytes);
}
/* Write chunk bits */
if (ok) {
- n_bytes = nBlocks * dev->chunk_bit_stride;
+ n_bytes = n_blocks * dev->chunk_bit_stride;
ok = (yaffs2_checkpt_wr(dev, dev->chunk_bits, n_bytes) == n_bytes);
}
return ok ? 1 : 0;
@@ -343,7 +343,7 @@ static int yaffs2_rd_checkpt_dev(yaffs_dev_t *dev)
{
yaffs_checkpt_dev_t cp;
__u32 n_bytes;
- __u32 nBlocks = (dev->internal_end_block - dev->internal_start_block + 1);
+ __u32 n_blocks = (dev->internal_end_block - dev->internal_start_block + 1);
int ok;
@@ -357,13 +357,13 @@ static int yaffs2_rd_checkpt_dev(yaffs_dev_t *dev)
yaffs_checkpt_dev_to_dev(dev, &cp);
- n_bytes = nBlocks * sizeof(yaffs_block_info_t);
+ n_bytes = n_blocks * sizeof(yaffs_block_info_t);
ok = (yaffs2_checkpt_rd(dev, dev->block_info, n_bytes) == n_bytes);
if (!ok)
return 0;
- n_bytes = nBlocks * dev->chunk_bit_stride;
+ n_bytes = n_blocks * dev->chunk_bit_stride;
ok = (yaffs2_checkpt_rd(dev, dev->chunk_bits, n_bytes) == n_bytes);
@@ -470,8 +470,9 @@ static int yaffs2_checkpt_tnode_worker(yaffs_obj_t *in, yaffs_tnode_t *tn,
}
}
} else if (level == 0) {
- __u32 baseOffset = chunk_offset << YAFFS_TNODES_LEVEL0_BITS;
- ok = (yaffs2_checkpt_wr(dev, &baseOffset, sizeof(baseOffset)) == sizeof(baseOffset));
+ __u32 base_offset = chunk_offset << YAFFS_TNODES_LEVEL0_BITS;
+ ok = (yaffs2_checkpt_wr(dev, &base_offset, sizeof(base_offset)) ==
+ sizeof(base_offset));
if (ok)
ok = (yaffs2_checkpt_wr(dev, tn, dev->tnode_size) == dev->tnode_size);
}
@@ -483,7 +484,7 @@ static int yaffs2_checkpt_tnode_worker(yaffs_obj_t *in, yaffs_tnode_t *tn,
static int yaffs2_wr_checkpt_tnodes(yaffs_obj_t *obj)
{
- __u32 endMarker = ~0;
+ __u32 end_marker = ~0;
int ok = 1;
if (obj->variant_type == YAFFS_OBJECT_TYPE_FILE) {
@@ -492,8 +493,8 @@ static int yaffs2_wr_checkpt_tnodes(yaffs_obj_t *obj)
obj->variant.file_variant.top_level,
0);
if (ok)
- ok = (yaffs2_checkpt_wr(obj->my_dev, &endMarker, sizeof(endMarker)) ==
- sizeof(endMarker));
+ ok = (yaffs2_checkpt_wr(obj->my_dev, &end_marker, sizeof(end_marker)) ==
+ sizeof(end_marker));
}
return ok ? 1 : 0;
@@ -501,16 +502,16 @@ static int yaffs2_wr_checkpt_tnodes(yaffs_obj_t *obj)
static int yaffs2_rd_checkpt_tnodes(yaffs_obj_t *obj)
{
- __u32 baseChunk;
+ __u32 base_chunk;
int ok = 1;
yaffs_dev_t *dev = obj->my_dev;
- yaffs_file_s *fileStructPtr = &obj->variant.file_variant;
+ yaffs_file_s *file_stuct_ptr = &obj->variant.file_variant;
yaffs_tnode_t *tn;
int nread = 0;
- ok = (yaffs2_checkpt_rd(dev, &baseChunk, sizeof(baseChunk)) == sizeof(baseChunk));
+ ok = (yaffs2_checkpt_rd(dev, &base_chunk, sizeof(base_chunk)) == sizeof(base_chunk));
- while (ok && (~baseChunk)) {
+ while (ok && (~base_chunk)) {
nread++;
/* Read level 0 tnode */
@@ -523,18 +524,18 @@ static int yaffs2_rd_checkpt_tnodes(yaffs_obj_t *obj)
if (tn && ok)
ok = yaffs_add_find_tnode_0(dev,
- fileStructPtr,
- baseChunk,
+ file_stuct_ptr,
+ base_chunk,
tn) ? 1 : 0;
if (ok)
- ok = (yaffs2_checkpt_rd(dev, &baseChunk, sizeof(baseChunk)) == sizeof(baseChunk));
+ ok = (yaffs2_checkpt_rd(dev, &base_chunk, sizeof(base_chunk)) == sizeof(base_chunk));
}
T(YAFFS_TRACE_CHECKPOINT, (
TSTR("Checkpoint read tnodes %d records, last %d. ok %d" TENDSTR),
- nread, baseChunk, ok));
+ nread, base_chunk, ok));
return ok ? 1 : 0;
}
@@ -807,21 +808,21 @@ int yaffs2_checkpt_restore(yaffs_dev_t *dev)
int yaffs2_handle_hole(yaffs_obj_t *obj, loff_t new_size)
{
- /* if newsSize > oldFileSize.
+ /* if new_size > old_file_size.
* We're going to be writing a hole.
* If the hole is small then write zeros otherwise write a start of hole marker.
*/
- loff_t oldFileSize;
+ loff_t old_file_size;
int increase;
- int smallHole ;
+ int small_hole ;
int result = YAFFS_OK;
yaffs_dev_t *dev = NULL;
- __u8 *localBuffer = NULL;
+ __u8 *local_buffer = NULL;
- int smallIncreaseOk = 0;
+ int small_increase_ok = 0;
if(!obj)
return YAFFS_FAIL;
@@ -835,50 +836,50 @@ int yaffs2_handle_hole(yaffs_obj_t *obj, loff_t new_size)
if(!dev->param.is_yaffs2)
return YAFFS_OK;
- oldFileSize = obj->variant.file_variant.file_size;
+ old_file_size = obj->variant.file_variant.file_size;
- if (new_size <= oldFileSize)
+ if (new_size <= old_file_size)
return YAFFS_OK;
- increase = new_size - oldFileSize;
+ increase = new_size - old_file_size;
if(increase < YAFFS_SMALL_HOLE_THRESHOLD * dev->data_bytes_per_chunk &&
yaffs_check_alloc_available(dev, YAFFS_SMALL_HOLE_THRESHOLD + 1))
- smallHole = 1;
+ small_hole = 1;
else
- smallHole = 0;
+ small_hole = 0;
- if(smallHole)
- localBuffer= yaffs_get_temp_buffer(dev, __LINE__);
+ if(small_hole)
+ local_buffer= yaffs_get_temp_buffer(dev, __LINE__);
- if(localBuffer){
+ if(local_buffer){
/* fill hole with zero bytes */
- int pos = oldFileSize;
- int thisWrite;
+ int pos = old_file_size;
+ int this_write;
int written;
- memset(localBuffer,0,dev->data_bytes_per_chunk);
- smallIncreaseOk = 1;
-
- while(increase > 0 && smallIncreaseOk){
- thisWrite = increase;
- if(thisWrite > dev->data_bytes_per_chunk)
- thisWrite = dev->data_bytes_per_chunk;
- written = yaffs_do_file_wr(obj,localBuffer,pos,thisWrite,0);
- if(written == thisWrite){
- pos += thisWrite;
- increase -= thisWrite;
+ memset(local_buffer,0,dev->data_bytes_per_chunk);
+ small_increase_ok = 1;
+
+ while(increase > 0 && small_increase_ok){
+ this_write = increase;
+ if(this_write > dev->data_bytes_per_chunk)
+ this_write = dev->data_bytes_per_chunk;
+ written = yaffs_do_file_wr(obj,local_buffer,pos,this_write,0);
+ if(written == this_write){
+ pos += this_write;
+ increase -= this_write;
} else
- smallIncreaseOk = 0;
+ small_increase_ok = 0;
}
- yaffs_release_temp_buffer(dev,localBuffer,__LINE__);
+ yaffs_release_temp_buffer(dev,local_buffer,__LINE__);
/* If we were out of space then reverse any chunks we've added */
- if(!smallIncreaseOk)
- yaffs_resize_file_down(obj, oldFileSize);
+ if(!small_increase_ok)
+ yaffs_resize_file_down(obj, old_file_size);
}
- if (!smallIncreaseOk &&
+ if (!small_increase_ok &&
obj->parent &&
obj->parent->obj_id != YAFFS_OBJECTID_UNLINKED &&
obj->parent->obj_id != YAFFS_OBJECTID_DELETED){
@@ -894,15 +895,15 @@ int yaffs2_handle_hole(yaffs_obj_t *obj, loff_t new_size)
typedef struct {
int seq;
int block;
-} yaffs_BlockIndex;
+} yaffs_block_index;
static int yaffs2_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;
+ register int aseq = ((yaffs_block_index *)a)->seq;
+ register int bseq = ((yaffs_block_index *)b)->seq;
+ register int ablock = ((yaffs_block_index *)a)->block;
+ register int bblock = ((yaffs_block_index *)b)->block;
if (aseq == bseq)
return ablock - bblock;
else
@@ -913,10 +914,10 @@ int yaffs2_scan_backwards(yaffs_dev_t *dev)
{
yaffs_ext_tags tags;
int blk;
- int blockIterator;
- int startIterator;
- int endIterator;
- int nBlocksToScan = 0;
+ int block_iter;
+ int start_iter;
+ int end_iter;
+ int n_to_scan = 0;
int chunk;
int result;
@@ -929,19 +930,19 @@ int yaffs2_scan_backwards(yaffs_dev_t *dev)
yaffs_obj_header *oh;
yaffs_obj_t *in;
yaffs_obj_t *parent;
- int nBlocks = dev->internal_end_block - dev->internal_start_block + 1;
- int itsUnlinked;
- __u8 *chunkData;
+ int n_blocks = dev->internal_end_block - dev->internal_start_block + 1;
+ int is_unlinked;
+ __u8 *chunk_data;
int file_size;
int is_shrink;
- int foundChunksInBlock;
+ int found_chunks;
int equiv_id;
int alloc_failed = 0;
- yaffs_BlockIndex *blockIndex = NULL;
- int altBlockIndex = 0;
+ yaffs_block_index *block_index = NULL;
+ int alt_block_index = 0;
T(YAFFS_TRACE_SCAN,
(TSTR
@@ -951,14 +952,14 @@ int yaffs2_scan_backwards(yaffs_dev_t *dev)
dev->seq_number = YAFFS_LOWEST_SEQUENCE_NUMBER;
- blockIndex = YMALLOC(nBlocks * sizeof(yaffs_BlockIndex));
+ block_index = YMALLOC(n_blocks * sizeof(yaffs_block_index));
- if (!blockIndex) {
- blockIndex = YMALLOC_ALT(nBlocks * sizeof(yaffs_BlockIndex));
- altBlockIndex = 1;
+ if (!block_index) {
+ block_index = YMALLOC_ALT(n_blocks * sizeof(yaffs_block_index));
+ alt_block_index = 1;
}
- if (!blockIndex) {
+ if (!block_index) {
T(YAFFS_TRACE_SCAN,
(TSTR("yaffs2_scan_backwards() could not allocate block index!" TENDSTR)));
return YAFFS_FAIL;
@@ -966,7 +967,7 @@ int yaffs2_scan_backwards(yaffs_dev_t *dev)
dev->blocks_in_checkpt = 0;
- chunkData = yaffs_get_temp_buffer(dev, __LINE__);
+ chunk_data = yaffs_get_temp_buffer(dev, __LINE__);
/* Scan all the blocks to determine their state */
bi = dev->block_info;
@@ -1007,10 +1008,10 @@ int yaffs2_scan_backwards(yaffs_dev_t *dev)
if (seq_number >= YAFFS_LOWEST_SEQUENCE_NUMBER &&
seq_number < YAFFS_HIGHEST_SEQUENCE_NUMBER) {
- blockIndex[nBlocksToScan].seq = seq_number;
- blockIndex[nBlocksToScan].block = blk;
+ block_index[n_to_scan].seq = seq_number;
+ block_index[n_to_scan].block = blk;
- nBlocksToScan++;
+ n_to_scan++;
if (seq_number >= dev->seq_number)
dev->seq_number = seq_number;
@@ -1027,34 +1028,34 @@ int yaffs2_scan_backwards(yaffs_dev_t *dev)
}
T(YAFFS_TRACE_SCAN,
- (TSTR("%d blocks to be sorted..." TENDSTR), nBlocksToScan));
+ (TSTR("%d blocks to be sorted..." TENDSTR), n_to_scan));
YYIELD();
/* Sort the blocks by sequence number*/
- yaffs_qsort(blockIndex, nBlocksToScan, sizeof(yaffs_BlockIndex), yaffs2_ybicmp);
+ yaffs_qsort(block_index, n_to_scan, sizeof(yaffs_block_index), yaffs2_ybicmp);
YYIELD();
T(YAFFS_TRACE_SCAN, (TSTR("...done" TENDSTR)));
/* Now scan the blocks looking at the data. */
- startIterator = 0;
- endIterator = nBlocksToScan - 1;
+ start_iter = 0;
+ end_iter = n_to_scan - 1;
T(YAFFS_TRACE_SCAN_DEBUG,
- (TSTR("%d blocks to be scanned" TENDSTR), nBlocksToScan));
+ (TSTR("%d blocks to be scanned" TENDSTR), n_to_scan));
/* For each block.... backwards */
- for (blockIterator = endIterator; !alloc_failed && blockIterator >= startIterator;
- blockIterator--) {
+ for (block_iter = end_iter; !alloc_failed && block_iter >= start_iter;
+ block_iter--) {
/* 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;
+ blk = block_index[block_iter].block;
bi = yaffs_get_block_info(dev, blk);
@@ -1064,7 +1065,7 @@ int yaffs2_scan_backwards(yaffs_dev_t *dev)
deleted = 0;
/* For each chunk in each block that needs scanning.... */
- foundChunksInBlock = 0;
+ found_chunks = 0;
for (c = dev->param.chunks_per_block - 1;
!alloc_failed && c >= 0 &&
(state == YAFFS_BLOCK_STATE_NEEDS_SCANNING ||
@@ -1090,7 +1091,7 @@ int yaffs2_scan_backwards(yaffs_dev_t *dev)
* this is the one being allocated from
*/
- if (foundChunksInBlock) {
+ if (found_chunks) {
/* 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 */
@@ -1145,10 +1146,10 @@ int yaffs2_scan_backwards(yaffs_dev_t *dev)
} else if (tags.chunk_id > 0) {
/* chunk_id > 0 so it is a data chunk... */
unsigned int endpos;
- __u32 chunkBase =
+ __u32 chunk_base =
(tags.chunk_id - 1) * dev->data_bytes_per_chunk;
- foundChunksInBlock = 1;
+ found_chunks = 1;
yaffs_set_chunk_bit(dev, blk, c);
@@ -1165,7 +1166,7 @@ int yaffs2_scan_backwards(yaffs_dev_t *dev)
if (in &&
in->variant_type == YAFFS_OBJECT_TYPE_FILE
- && chunkBase < in->variant.file_variant.shrink_size) {
+ && chunk_base < in->variant.file_variant.shrink_size) {
/* This has not been invalidated by a resize */
if (!yaffs_put_chunk_in_file(in, tags.chunk_id, chunk, -1)) {
alloc_failed = 1;
@@ -1174,7 +1175,7 @@ int yaffs2_scan_backwards(yaffs_dev_t *dev)
/* 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 = chunkBase + tags.n_bytes;
+ endpos = chunk_base + tags.n_bytes;
if (!in->valid && /* have not got an object header yet */
in->variant.file_variant.scanned_size < endpos) {
@@ -1192,7 +1193,7 @@ int yaffs2_scan_backwards(yaffs_dev_t *dev)
/* chunk_id == 0, so it is an ObjectHeader.
* Thus, we read in the object header and make the object
*/
- foundChunksInBlock = 1;
+ found_chunks = 1;
yaffs_set_chunk_bit(dev, blk, c);
bi->pages_in_use++;
@@ -1222,10 +1223,10 @@ int yaffs2_scan_backwards(yaffs_dev_t *dev)
result = yaffs_rd_chunk_tags_nand(dev,
chunk,
- chunkData,
+ chunk_data,
NULL);
- oh = (yaffs_obj_header *) chunkData;
+ oh = (yaffs_obj_header *) chunk_data;
if (dev->param.inband_tags) {
/* Fix up the header if they got corrupted by inband tags */
@@ -1261,7 +1262,7 @@ int yaffs2_scan_backwards(yaffs_dev_t *dev)
oh->type == YAFFS_OBJECT_TYPE_FILE) ||
(tags.extra_available &&
tags.extra_obj_type == YAFFS_OBJECT_TYPE_FILE))) {
- __u32 thisSize =
+ __u32 this_size =
(oh) ? oh->file_size : tags.
extra_length;
__u32 parent_obj_id =
@@ -1281,12 +1282,12 @@ int yaffs2_scan_backwards(yaffs_dev_t *dev)
YAFFS_OBJECTID_DELETED
|| parent_obj_id ==
YAFFS_OBJECTID_UNLINKED) {
- thisSize = 0;
+ this_size = 0;
is_shrink = 1;
}
- if (is_shrink && in->variant.file_variant.shrink_size > thisSize)
- in->variant.file_variant.shrink_size = thisSize;
+ if (is_shrink && in->variant.file_variant.shrink_size > this_size)
+ in->variant.file_variant.shrink_size = this_size;
if (is_shrink)
bi->has_shrink_hdr = 1;
@@ -1429,11 +1430,11 @@ int yaffs2_scan_backwards(yaffs_dev_t *dev)
yaffs_add_obj_to_dir(parent, in);
- itsUnlinked = (parent == dev->del_dir) ||
+ is_unlinked = (parent == dev->del_dir) ||
(parent == dev->unlinked_dir);
if (is_shrink) {
- /* Mark the block as having a shrinkHeader */
+ /* Mark the block as having a shrink header */
bi->has_shrink_hdr = 1;
}
@@ -1467,7 +1468,7 @@ int yaffs2_scan_backwards(yaffs_dev_t *dev)
break;
case YAFFS_OBJECT_TYPE_HARDLINK:
- if (!itsUnlinked) {
+ if (!is_unlinked) {
in->variant.hardlink_variant.equiv_id =
equiv_id;
in->hard_links.next =
@@ -1516,10 +1517,10 @@ int yaffs2_scan_backwards(yaffs_dev_t *dev)
yaffs_skip_rest_of_block(dev);
- if (altBlockIndex)
- YFREE_ALT(blockIndex);
+ if (alt_block_index)
+ YFREE_ALT(block_index);
else
- YFREE(blockIndex);
+ YFREE(block_index);
/* Ok, we've done all the scanning.
* Fix up the hard link chains.
@@ -1529,7 +1530,7 @@ int yaffs2_scan_backwards(yaffs_dev_t *dev)
yaffs_link_fixup(dev, hard_list);
- yaffs_release_temp_buffer(dev, chunkData, __LINE__);
+ yaffs_release_temp_buffer(dev, chunk_data, __LINE__);
if (alloc_failed)
return YAFFS_FAIL;
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-26 08:33:26 +0000