int nandmtd2_read_chunk_tags(struct yaffs_dev *dev, int nand_chunk,
u8 *data, struct yaffs_ext_tags *tags)
{
struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
#if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17))
struct mtd_oob_ops ops;
#endif
size_t dummy;
int retval = 0;
int local_data = 0;
loff_t addr = ((loff_t) nand_chunk) * dev->param.total_bytes_per_chunk;
struct yaffs_packed_tags2 pt;
int packed_tags_size =
dev->param.no_tags_ecc ? sizeof(pt.t) : sizeof(pt);
void *packed_tags_ptr =
dev->param.no_tags_ecc ? (void *)&pt.t : (void *)&pt;
yaffs_trace(YAFFS_TRACE_MTD,
"nandmtd2_read_chunk_tags chunk %d data %p tags %p",
nand_chunk, data, tags);
if (dev->param.inband_tags) {
if (!data) {
local_data = 1;
data = yaffs_get_temp_buffer(dev);
}
}
#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
if (dev->param.inband_tags || (data && !tags))
retval = mtd->read(mtd, addr, dev->param.total_bytes_per_chunk,
&dummy, data);
else if (tags) {
ops.mode = MTD_OPS_AUTO_OOB;
ops.ooblen = packed_tags_size;
ops.len = data ? dev->data_bytes_per_chunk : packed_tags_size;
ops.ooboffs = 0;
ops.datbuf = data;
ops.oobbuf = yaffs_dev_to_lc(dev)->spare_buffer;
retval = mtd->read_oob(mtd, addr, &ops);
}
#else
if (!dev->param.inband_tags && data && tags) {
retval = mtd->read_ecc(mtd, addr, dev->data_bytes_per_chunk,
&dummy, data, dev->spare_buffer, NULL);
} else {
if (data)
retval =
mtd->read(mtd, addr, dev->data_bytes_per_chunk,
&dummy, data);
if (!dev->param.inband_tags && tags)
retval =
mtd->read_oob(mtd, addr, mtd->oobsize, &dummy,
dev->spare_buffer);
}
#endif
if (dev->param.inband_tags) {
if (tags) {
struct yaffs_packed_tags2_tags_only *pt2tp;
pt2tp =
(struct yaffs_packed_tags2_tags_only *)
&data[dev->data_bytes_per_chunk];
yaffs_unpack_tags2_tags_only(tags, pt2tp);
}
} else {
if (tags) {
memcpy(packed_tags_ptr,
yaffs_dev_to_lc(dev)->spare_buffer,
packed_tags_size);
yaffs_unpack_tags2(tags, &pt, !dev->param.no_tags_ecc);
}
}
if (local_data)
yaffs_release_temp_buffer(dev, data);
if (tags && retval == -EBADMSG
&& tags->ecc_result == YAFFS_ECC_RESULT_NO_ERROR) {
tags->ecc_result = YAFFS_ECC_RESULT_UNFIXED;
dev->n_ecc_unfixed++;
}
if (tags && retval == -EUCLEAN
&& tags->ecc_result == YAFFS_ECC_RESULT_NO_ERROR) {
tags->ecc_result = YAFFS_ECC_RESULT_FIXED;
dev->n_ecc_fixed++;
}
if (retval == 0)
return YAFFS_OK;
else
return YAFFS_FAIL;
}
int yaffs_summary_read(struct yaffs_dev *dev,
struct yaffs_summary_tags *st,
int blk)
{
struct yaffs_ext_tags tags;
u8 *buffer;
u8 *sum_buffer = (u8 *)st;
int n_bytes;
int chunk_id;
int chunk_in_nand;
int chunk_in_block;
int result;
int this_tx;
struct yaffs_summary_header hdr;
struct yaffs_block_info *bi = yaffs_get_block_info(dev, blk);
int sum_bytes_per_chunk = dev->data_bytes_per_chunk - sizeof(hdr);
int sum_tags_bytes;
sum_tags_bytes = sizeof(struct yaffs_summary_tags) *
dev->chunks_per_summary;
buffer = yaffs_get_temp_buffer(dev);
n_bytes = sizeof(struct yaffs_summary_tags) * dev->chunks_per_summary;
chunk_in_block = dev->chunks_per_summary;
chunk_in_nand = blk * dev->param.chunks_per_block +
dev->chunks_per_summary;
chunk_id = 1;
do {
this_tx = n_bytes;
if (this_tx > sum_bytes_per_chunk)
this_tx = sum_bytes_per_chunk;
result = yaffs_rd_chunk_tags_nand(dev, chunk_in_nand,
buffer, &tags);
if (tags.chunk_id != chunk_id ||
tags.obj_id != YAFFS_OBJECTID_SUMMARY ||
tags.chunk_used == 0 ||
tags.ecc_result > YAFFS_ECC_RESULT_FIXED ||
tags.n_bytes != (this_tx + sizeof(hdr)))
result = YAFFS_FAIL;
if (result != YAFFS_OK)
break;
if (st == dev->sum_tags) {
/* If we're scanning then update the block info */
yaffs_set_chunk_bit(dev, blk, chunk_in_block);
bi->pages_in_use++;
}
memcpy(&hdr, buffer, sizeof(hdr));
memcpy(sum_buffer, buffer + sizeof(hdr), this_tx);
n_bytes -= this_tx;
sum_buffer += this_tx;
chunk_in_nand++;
chunk_in_block++;
chunk_id++;
} while (result == YAFFS_OK && n_bytes > 0);
yaffs_release_temp_buffer(dev, buffer);
if (result == YAFFS_OK) {
/* Verify header */
if (hdr.version != YAFFS_SUMMARY_VERSION ||
hdr.seq != bi->seq_number ||
hdr.sum != yaffs_summary_sum(dev))
result = YAFFS_FAIL;
}
if (st == dev->sum_tags && result == YAFFS_OK)
bi->has_summary = 1;
return result;
}
int yaffs1_scan(struct yaffs_dev *dev)
{
struct yaffs_ext_tags tags;
int blk;
int result;
int chunk;
int c;
int deleted;
enum yaffs_block_state state;
LIST_HEAD(hard_list);
struct yaffs_block_info *bi;
u32 seq_number;
struct yaffs_obj_hdr *oh;
struct yaffs_obj *in;
struct yaffs_obj *parent;
int alloc_failed = 0;
struct yaffs_shadow_fixer *shadow_fixers = NULL;
u8 *chunk_data;
yaffs_trace(YAFFS_TRACE_SCAN,
"yaffs1_scan starts intstartblk %d intendblk %d...",
dev->internal_start_block, dev->internal_end_block);
chunk_data = yaffs_get_temp_buffer(dev);
dev->seq_number = YAFFS_LOWEST_SEQUENCE_NUMBER;
/* Scan all the blocks to determine their state */
bi = dev->block_info;
for (blk = dev->internal_start_block; blk <= dev->internal_end_block;
blk++) {
yaffs_clear_chunk_bits(dev, blk);
bi->pages_in_use = 0;
bi->soft_del_pages = 0;
yaffs_query_init_block_state(dev, blk, &state, &seq_number);
bi->block_state = state;
bi->seq_number = seq_number;
if (bi->seq_number == YAFFS_SEQUENCE_BAD_BLOCK)
bi->block_state = state = YAFFS_BLOCK_STATE_DEAD;
yaffs_trace(YAFFS_TRACE_SCAN_DEBUG,
"Block scanning block %d state %d seq %d",
blk, state, seq_number);
if (state == YAFFS_BLOCK_STATE_DEAD) {
yaffs_trace(YAFFS_TRACE_BAD_BLOCKS,
"block %d is bad", blk);
} else if (state == YAFFS_BLOCK_STATE_EMPTY) {
yaffs_trace(YAFFS_TRACE_SCAN_DEBUG, "Block empty ");
dev->n_erased_blocks++;
dev->n_free_chunks += dev->param.chunks_per_block;
}
bi++;
}
/* For each block.... */
for (blk = dev->internal_start_block;
!alloc_failed && blk <= dev->internal_end_block; blk++) {
cond_resched();
bi = yaffs_get_block_info(dev, blk);
state = bi->block_state;
deleted = 0;
/* For each chunk in each block that needs scanning.... */
for (c = 0;
!alloc_failed && c < dev->param.chunks_per_block &&
state == YAFFS_BLOCK_STATE_NEEDS_SCAN; c++) {
/* Read the tags and decide what to do */
chunk = blk * dev->param.chunks_per_block + c;
result = yaffs_rd_chunk_tags_nand(dev, chunk, NULL,
&tags);
/* Let's have a good look at this chunk... */
if (tags.ecc_result == YAFFS_ECC_RESULT_UNFIXED ||
tags.is_deleted) {
/* YAFFS1 only...
* A deleted chunk
*/
deleted++;
dev->n_free_chunks++;
} else if (!tags.chunk_used) {
/* An unassigned chunk in the block
* This means that either the block is empty or
* this is the one being allocated from
*/
if (c == 0) {
/* We're looking at the first chunk in
*the block so the block is unused */
state = YAFFS_BLOCK_STATE_EMPTY;
dev->n_erased_blocks++;
} else {
/* this is the block being allocated */
yaffs_trace(YAFFS_TRACE_SCAN,
" Allocating from %d %d",
blk, c);
state = YAFFS_BLOCK_STATE_ALLOCATING;
dev->alloc_block = blk;
dev->alloc_page = c;
dev->alloc_block_finder = blk;
}
dev->n_free_chunks +=
(dev->param.chunks_per_block - c);
} else if (tags.chunk_id > 0) {
/* chunk_id > 0 so it is a data chunk... */
unsigned int endpos;
yaffs_set_chunk_bit(dev, blk, c);
bi->pages_in_use++;
in = yaffs_find_or_create_by_number(dev,
tags.obj_id,
YAFFS_OBJECT_TYPE_FILE);
/* PutChunkIntoFile checks for a clash
* (two data chunks with the same chunk_id).
*/
if (!in)
alloc_failed = 1;
if (in) {
if (!yaffs_put_chunk_in_file
(in, tags.chunk_id, chunk, 1))
alloc_failed = 1;
}
endpos =
(tags.chunk_id - 1) *
dev->data_bytes_per_chunk +
tags.n_bytes;
if (in &&
in->variant_type ==
YAFFS_OBJECT_TYPE_FILE &&
in->variant.file_variant.scanned_size <
endpos) {
in->variant.file_variant.scanned_size =
endpos;
if (!dev->param.use_header_file_size) {
in->variant.
file_variant.file_size =
in->variant.
file_variant.scanned_size;
}
}
} else {
/* chunk_id == 0, so it is an ObjectHeader.
* Make the object
*/
yaffs_set_chunk_bit(dev, blk, c);
bi->pages_in_use++;
result = yaffs_rd_chunk_tags_nand(dev, chunk,
chunk_data,
NULL);
oh = (struct yaffs_obj_hdr *)chunk_data;
in = yaffs_find_by_number(dev, tags.obj_id);
if (in && in->variant_type != oh->type) {
/* This should not happen, but somehow
* Wev'e ended up with an obj_id that
* has been reused but not yet deleted,
* and worse still it has changed type.
* Delete the old object.
*/
yaffs_del_obj(in);
in = NULL;
}
in = yaffs_find_or_create_by_number(dev,
tags.obj_id,
oh->type);
if (!in)
alloc_failed = 1;
if (in && oh->shadows_obj > 0) {
struct yaffs_shadow_fixer *fixer;
fixer =
kmalloc(sizeof
(struct yaffs_shadow_fixer),
GFP_NOFS);
if (fixer) {
fixer->next = shadow_fixers;
shadow_fixers = fixer;
fixer->obj_id = tags.obj_id;
fixer->shadowed_id =
oh->shadows_obj;
yaffs_trace(YAFFS_TRACE_SCAN,
" Shadow fixer: %d shadows %d",
fixer->obj_id,
fixer->shadowed_id);
}
}
if (in && in->valid) {
/* We have already filled this one.
* We have a duplicate and need to
* resolve it. */
unsigned existing_serial = in->serial;
unsigned new_serial =
tags.serial_number;
if (((existing_serial + 1) & 3) ==
new_serial) {
/* Use new one - destroy the
* exisiting one */
yaffs_chunk_del(dev,
in->hdr_chunk,
1, __LINE__);
in->valid = 0;
} else {
/* Use existing - destroy
* this one. */
yaffs_chunk_del(dev, chunk, 1,
__LINE__);
}
}
if (in && !in->valid &&
(tags.obj_id == YAFFS_OBJECTID_ROOT ||
tags.obj_id ==
YAFFS_OBJECTID_LOSTNFOUND)) {
/* We only load some info, don't fiddle
* with directory structure */
in->valid = 1;
in->variant_type = oh->type;
in->yst_mode = oh->yst_mode;
yaffs_load_attribs(in, oh);
in->hdr_chunk = chunk;
in->serial = tags.serial_number;
} else if (in && !in->valid) {
/* we need to load this info */
in->valid = 1;
in->variant_type = oh->type;
in->yst_mode = oh->yst_mode;
yaffs_load_attribs(in, oh);
in->hdr_chunk = chunk;
in->serial = tags.serial_number;
yaffs_set_obj_name_from_oh(in, oh);
in->dirty = 0;
/* directory stuff...
* hook up to parent
*/
parent =
yaffs_find_or_create_by_number
(dev, oh->parent_obj_id,
YAFFS_OBJECT_TYPE_DIRECTORY);
if (!parent)
alloc_failed = 1;
if (parent && parent->variant_type ==
YAFFS_OBJECT_TYPE_UNKNOWN) {
/* Set up as a directory */
parent->variant_type =
YAFFS_OBJECT_TYPE_DIRECTORY;
INIT_LIST_HEAD(&parent->
variant.dir_variant.
children);
} else if (!parent ||
parent->variant_type !=
YAFFS_OBJECT_TYPE_DIRECTORY) {
/* Hoosterman, a problem....
* We're trying to use a
* non-directory as a directory
*/
yaffs_trace(YAFFS_TRACE_ERROR,
"yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found."
);
parent = dev->lost_n_found;
}
yaffs_add_obj_to_dir(parent, in);
switch (in->variant_type) {
case YAFFS_OBJECT_TYPE_UNKNOWN:
/* Todo got a problem */
break;
case YAFFS_OBJECT_TYPE_FILE:
if (dev->param.
use_header_file_size)
in->variant.
file_variant.file_size
= yaffs_oh_to_size(oh);
break;
case YAFFS_OBJECT_TYPE_HARDLINK:
in->variant.
hardlink_variant.equiv_id =
oh->equiv_id;
list_add(&in->hard_links,
&hard_list);
break;
case YAFFS_OBJECT_TYPE_DIRECTORY:
/* Do nothing */
break;
case YAFFS_OBJECT_TYPE_SPECIAL:
/* Do nothing */
break;
case YAFFS_OBJECT_TYPE_SYMLINK:
in->variant.symlink_variant.
alias =
yaffs_clone_str(oh->alias);
if (!in->variant.
symlink_variant.alias)
alloc_failed = 1;
break;
}
}
}
}
if (state == YAFFS_BLOCK_STATE_NEEDS_SCAN) {
/* If we got this far while scanning,
* then the block is fully allocated. */
state = YAFFS_BLOCK_STATE_FULL;
}
if (state == YAFFS_BLOCK_STATE_ALLOCATING) {
/* If the block was partially allocated then
* treat it as fully allocated. */
state = YAFFS_BLOCK_STATE_FULL;
dev->alloc_block = -1;
}
bi->block_state = state;
/* Now let's see if it was dirty */
if (bi->pages_in_use == 0 &&
!bi->has_shrink_hdr &&
bi->block_state == YAFFS_BLOCK_STATE_FULL)
yaffs_block_became_dirty(dev, blk);
}
/* Ok, we've done all the scanning.
* Fix up the hard link chains.
* We should now have scanned all the objects, now it's time to add
* these hardlinks.
*/
yaffs_link_fixup(dev, &hard_list);
/*
* Fix up any shadowed objects.
* There should not be more than one of these.
*/
{
struct yaffs_shadow_fixer *fixer;
struct yaffs_obj *obj;
while (shadow_fixers) {
fixer = shadow_fixers;
shadow_fixers = fixer->next;
/* Complete the rename transaction by deleting the
* shadowed object then setting the object header
to unshadowed.
*/
obj = yaffs_find_by_number(dev, fixer->shadowed_id);
if (obj)
yaffs_del_obj(obj);
obj = yaffs_find_by_number(dev, fixer->obj_id);
if (obj)
yaffs_update_oh(obj, NULL, 1, 0, 0, NULL);
kfree(fixer);
}
}
yaffs_release_temp_buffer(dev, chunk_data);
if (alloc_failed)
return YAFFS_FAIL;
yaffs_trace(YAFFS_TRACE_SCAN, "yaffs1_scan ends");
return YAFFS_OK;
}
int yaffs1_scan(yaffs_dev_t *dev)
{
yaffs_ext_tags tags;
int blk;
int blockIterator;
int startIterator;
int endIterator;
int result;
int chunk;
int c;
int deleted;
yaffs_block_state_t state;
yaffs_obj_t *hard_list = NULL;
yaffs_block_info_t *bi;
__u32 seq_number;
yaffs_obj_header *oh;
yaffs_obj_t *in;
yaffs_obj_t *parent;
int alloc_failed = 0;
struct yaffs_shadow_fixer_s *shadowFixerList = NULL;
__u8 *chunkData;
T(YAFFS_TRACE_SCAN,
(TSTR("yaffs1_scan starts intstartblk %d intendblk %d..." TENDSTR),
dev->internal_start_block, dev->internal_end_block));
chunkData = yaffs_get_temp_buffer(dev, __LINE__);
dev->seq_number = YAFFS_LOWEST_SEQUENCE_NUMBER;
/* Scan all the blocks to determine their state */
bi = dev->block_info;
for (blk = dev->internal_start_block; blk <= dev->internal_end_block; blk++) {
yaffs_clear_chunk_bits(dev, blk);
bi->pages_in_use = 0;
bi->soft_del_pages = 0;
yaffs_query_init_block_state(dev, blk, &state, &seq_number);
bi->block_state = state;
bi->seq_number = seq_number;
if (bi->seq_number == YAFFS_SEQUENCE_BAD_BLOCK)
bi->block_state = state = YAFFS_BLOCK_STATE_DEAD;
T(YAFFS_TRACE_SCAN_DEBUG,
(TSTR("Block scanning block %d state %d seq %d" TENDSTR), blk,
state, seq_number));
if (state == YAFFS_BLOCK_STATE_DEAD) {
T(YAFFS_TRACE_BAD_BLOCKS,
(TSTR("block %d is bad" TENDSTR), blk));
} else if (state == YAFFS_BLOCK_STATE_EMPTY) {
T(YAFFS_TRACE_SCAN_DEBUG,
(TSTR("Block empty " TENDSTR)));
dev->n_erased_blocks++;
dev->n_free_chunks += dev->param.chunks_per_block;
}
bi++;
}
startIterator = dev->internal_start_block;
endIterator = dev->internal_end_block;
/* For each block.... */
for (blockIterator = startIterator; !alloc_failed && blockIterator <= endIterator;
blockIterator++) {
YYIELD();
YYIELD();
blk = blockIterator;
bi = yaffs_get_block_info(dev, blk);
state = bi->block_state;
deleted = 0;
/* For each chunk in each block that needs scanning....*/
for (c = 0; !alloc_failed && c < dev->param.chunks_per_block &&
state == YAFFS_BLOCK_STATE_NEEDS_SCANNING; c++) {
/* Read the tags and decide what to do */
chunk = blk * dev->param.chunks_per_block + c;
result = yaffs_rd_chunk_tags_nand(dev, chunk, NULL,
&tags);
/* Let's have a good look at this chunk... */
if (tags.ecc_result == YAFFS_ECC_RESULT_UNFIXED || tags.is_deleted) {
/* YAFFS1 only...
* A deleted chunk
*/
deleted++;
dev->n_free_chunks++;
/*T((" %d %d deleted\n",blk,c)); */
} else if (!tags.chunk_used) {
/* An unassigned chunk in the block
* This means that either the block is empty or
* this is the one being allocated from
*/
if (c == 0) {
/* We're looking at the first chunk in the block so the block is unused */
state = YAFFS_BLOCK_STATE_EMPTY;
dev->n_erased_blocks++;
} else {
/* this is the block being allocated from */
T(YAFFS_TRACE_SCAN,
(TSTR
(" Allocating from %d %d" TENDSTR),
blk, c));
state = YAFFS_BLOCK_STATE_ALLOCATING;
dev->alloc_block = blk;
dev->alloc_page = c;
dev->alloc_block_finder = blk;
/* Set block finder here to encourage the allocator to go forth from here. */
}
dev->n_free_chunks += (dev->param.chunks_per_block - c);
} else if (tags.chunk_id > 0) {
/* chunk_id > 0 so it is a data chunk... */
unsigned int endpos;
yaffs_set_chunk_bit(dev, blk, c);
bi->pages_in_use++;
in = yaffs_find_or_create_by_number(dev,
tags.
obj_id,
YAFFS_OBJECT_TYPE_FILE);
/* PutChunkIntoFile checks for a clash (two data chunks with
* the same chunk_id).
*/
if (!in)
alloc_failed = 1;
if (in) {
if (!yaffs_put_chunk_in_file(in, tags.chunk_id, chunk, 1))
alloc_failed = 1;
}
endpos =
(tags.chunk_id - 1) * dev->data_bytes_per_chunk +
tags.n_bytes;
if (in &&
in->variant_type == YAFFS_OBJECT_TYPE_FILE
&& in->variant.file_variant.scanned_size <
endpos) {
in->variant.file_variant.
scanned_size = endpos;
if (!dev->param.use_header_file_size) {
in->variant.file_variant.
file_size =
in->variant.file_variant.
scanned_size;
}
}
/* T((" %d %d data %d %d\n",blk,c,tags.obj_id,tags.chunk_id)); */
} else {
/* chunk_id == 0, so it is an ObjectHeader.
* Thus, we read in the object header and make the object
*/
yaffs_set_chunk_bit(dev, blk, c);
bi->pages_in_use++;
result = yaffs_rd_chunk_tags_nand(dev, chunk,
chunkData,
NULL);
oh = (yaffs_obj_header *) chunkData;
in = yaffs_find_by_number(dev,
tags.obj_id);
if (in && in->variant_type != oh->type) {
/* This should not happen, but somehow
* Wev'e ended up with an obj_id that has been reused but not yet
* deleted, and worse still it has changed type. Delete the old object.
*/
yaffs_del_obj(in);
in = 0;
}
in = yaffs_find_or_create_by_number(dev,
tags.
obj_id,
oh->type);
if (!in)
alloc_failed = 1;
if (in && oh->shadows_obj > 0) {
struct yaffs_shadow_fixer_s *fixer;
fixer = YMALLOC(sizeof(struct yaffs_shadow_fixer_s));
if (fixer) {
fixer->next = shadowFixerList;
shadowFixerList = fixer;
fixer->obj_id = tags.obj_id;
fixer->shadowed_id = oh->shadows_obj;
T(YAFFS_TRACE_SCAN,
(TSTR
(" Shadow fixer: %d shadows %d" TENDSTR),
fixer->obj_id, fixer->shadowed_id));
}
}
if (in && in->valid) {
/* We have already filled this one. We have a duplicate and need to resolve it. */
unsigned existingSerial = in->serial;
unsigned newSerial = tags.serial_number;
if (((existingSerial + 1) & 3) == newSerial) {
/* Use new one - destroy the exisiting one */
yaffs_chunk_del(dev,
in->hdr_chunk,
1, __LINE__);
in->valid = 0;
} else {
/* Use existing - destroy this one. */
yaffs_chunk_del(dev, chunk, 1,
__LINE__);
}
}
if (in && !in->valid &&
(tags.obj_id == YAFFS_OBJECTID_ROOT ||
tags.obj_id == YAFFS_OBJECTID_LOSTNFOUND)) {
/* We only load some info, don't fiddle with directory structure */
in->valid = 1;
in->variant_type = oh->type;
in->yst_mode = oh->yst_mode;
#ifdef CONFIG_YAFFS_WINCE
in->win_atime[0] = oh->win_atime[0];
in->win_ctime[0] = oh->win_ctime[0];
in->win_mtime[0] = oh->win_mtime[0];
in->win_atime[1] = oh->win_atime[1];
in->win_ctime[1] = oh->win_ctime[1];
in->win_mtime[1] = oh->win_mtime[1];
#else
in->yst_uid = oh->yst_uid;
in->yst_gid = oh->yst_gid;
in->yst_atime = oh->yst_atime;
in->yst_mtime = oh->yst_mtime;
in->yst_ctime = oh->yst_ctime;
in->yst_rdev = oh->yst_rdev;
#endif
in->hdr_chunk = chunk;
in->serial = tags.serial_number;
} else if (in && !in->valid) {
/* we need to load this info */
in->valid = 1;
in->variant_type = oh->type;
in->yst_mode = oh->yst_mode;
#ifdef CONFIG_YAFFS_WINCE
in->win_atime[0] = oh->win_atime[0];
in->win_ctime[0] = oh->win_ctime[0];
in->win_mtime[0] = oh->win_mtime[0];
in->win_atime[1] = oh->win_atime[1];
in->win_ctime[1] = oh->win_ctime[1];
in->win_mtime[1] = oh->win_mtime[1];
#else
in->yst_uid = oh->yst_uid;
in->yst_gid = oh->yst_gid;
in->yst_atime = oh->yst_atime;
in->yst_mtime = oh->yst_mtime;
in->yst_ctime = oh->yst_ctime;
in->yst_rdev = oh->yst_rdev;
#endif
in->hdr_chunk = chunk;
in->serial = tags.serial_number;
yaffs_set_obj_name_from_oh(in, oh);
in->dirty = 0;
/* directory stuff...
* hook up to parent
*/
parent =
yaffs_find_or_create_by_number
(dev, oh->parent_obj_id,
YAFFS_OBJECT_TYPE_DIRECTORY);
if (!parent)
alloc_failed = 1;
if (parent && parent->variant_type ==
YAFFS_OBJECT_TYPE_UNKNOWN) {
/* Set up as a directory */
parent->variant_type =
YAFFS_OBJECT_TYPE_DIRECTORY;
YINIT_LIST_HEAD(&parent->variant.
dir_variant.
children);
} else if (!parent || parent->variant_type !=
YAFFS_OBJECT_TYPE_DIRECTORY) {
/* Hoosterman, another problem....
* We're trying to use a non-directory as a directory
*/
T(YAFFS_TRACE_ERROR,
(TSTR
("yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found."
TENDSTR)));
parent = dev->lost_n_found;
}
yaffs_add_obj_to_dir(parent, in);
if (0 && (parent == dev->del_dir ||
parent == dev->unlinked_dir)) {
in->deleted = 1; /* If it is unlinked at start up then it wants deleting */
dev->n_deleted_files++;
}
/* Note re hardlinks.
* Since we might scan a hardlink before its equivalent object is scanned
* we put them all in a list.
* After scanning is complete, we should have all the objects, so we run through this
* list and fix up all the chains.
*/
switch (in->variant_type) {
case YAFFS_OBJECT_TYPE_UNKNOWN:
/* Todo got a problem */
break;
case YAFFS_OBJECT_TYPE_FILE:
if (dev->param.use_header_file_size)
in->variant.file_variant.
file_size =
oh->file_size;
break;
case YAFFS_OBJECT_TYPE_HARDLINK:
in->variant.hardlink_variant.
equiv_id =
oh->equiv_id;
in->hard_links.next =
(struct ylist_head *)
hard_list;
hard_list = in;
break;
case YAFFS_OBJECT_TYPE_DIRECTORY:
/* Do nothing */
break;
case YAFFS_OBJECT_TYPE_SPECIAL:
/* Do nothing */
break;
case YAFFS_OBJECT_TYPE_SYMLINK:
in->variant.symlink_variant.alias =
yaffs_clone_str(oh->alias);
if (!in->variant.symlink_variant.alias)
alloc_failed = 1;
break;
}
}
}
}
if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) {
/* If we got this far while scanning, then the block is fully allocated.*/
state = YAFFS_BLOCK_STATE_FULL;
}
if (state == YAFFS_BLOCK_STATE_ALLOCATING) {
/* If the block was partially allocated then treat it as fully allocated.*/
state = YAFFS_BLOCK_STATE_FULL;
dev->alloc_block = -1;
}
bi->block_state = state;
/* Now let's see if it was dirty */
if (bi->pages_in_use == 0 &&
!bi->has_shrink_hdr &&
bi->block_state == YAFFS_BLOCK_STATE_FULL) {
yaffs_block_became_dirty(dev, blk);
}
}
/* Ok, we've done all the scanning.
* Fix up the hard link chains.
* We should now have scanned all the objects, now it's time to add these
* hardlinks.
*/
yaffs_link_fixup(dev, hard_list);
/* Fix up any shadowed objects */
{
struct yaffs_shadow_fixer_s *fixer;
yaffs_obj_t *obj;
while (shadowFixerList) {
fixer = shadowFixerList;
shadowFixerList = fixer->next;
/* Complete the rename transaction by deleting the shadowed object
* then setting the object header to unshadowed.
*/
obj = yaffs_find_by_number(dev, fixer->shadowed_id);
if (obj)
yaffs_del_obj(obj);
obj = yaffs_find_by_number(dev, fixer->obj_id);
if (obj)
yaffs_update_oh(obj, NULL, 1, 0, 0, NULL);
YFREE(fixer);
}
}
yaffs_release_temp_buffer(dev, chunkData, __LINE__);
if (alloc_failed)
return YAFFS_FAIL;
T(YAFFS_TRACE_SCAN, (TSTR("yaffs1_scan ends" TENDSTR)));
return YAFFS_OK;
}
int yflash2_ReadChunkWithTagsFromNAND(struct yaffs_dev *dev,int nand_chunk, u8 *data, struct yaffs_ext_tags *tags)
{
int nread;
int pos;
int h;
int localData = 0;
int retval = YAFFS_OK;
int nRead;
yaffs_trace(YAFFS_TRACE_MTD,"read chunk %d data %p tags %p",nand_chunk, data, tags);
CheckInit();
if(dev->param.inband_tags){
/* Got to suck the tags out of the data area */
if(!data) {
localData=1;
data = yaffs_get_temp_buffer(dev);
}
struct yaffs_packed_tags2_tags_only * pt2tp;
pt2tp = (struct yaffs_packed_tags2_tags_only *)&data[dev->data_bytes_per_chunk];
pos = (nand_chunk % (PAGES_PER_BLOCK * BLOCKS_PER_HANDLE)) * PAGE_SIZE;
h = filedisk.handle[(nand_chunk / (PAGES_PER_BLOCK * BLOCKS_PER_HANDLE))];
lseek(h,pos,SEEK_SET);
nRead = read(h, data,dev->param.total_bytes_per_chunk);
yaffs_unpack_tags2_tags_only(tags,pt2tp);
if(nread != dev->param.total_bytes_per_chunk)
retval = YAFFS_FAIL;
if(localData)
yaffs_release_temp_buffer(dev, data);
}
else {
if(data)
{
pos = (nand_chunk % (PAGES_PER_BLOCK * BLOCKS_PER_HANDLE)) * PAGE_SIZE;
h = filedisk.handle[(nand_chunk / (PAGES_PER_BLOCK * BLOCKS_PER_HANDLE))];
lseek(h,pos,SEEK_SET);
nread = read(h,data,dev->data_bytes_per_chunk);
if(nread != dev->data_bytes_per_chunk)
retval = YAFFS_FAIL;
}
if(tags)
{
pos = (nand_chunk % (PAGES_PER_BLOCK * BLOCKS_PER_HANDLE)) * PAGE_SIZE + PAGE_DATA_SIZE;
h = filedisk.handle[(nand_chunk / (PAGES_PER_BLOCK * BLOCKS_PER_HANDLE))];
lseek(h,pos,SEEK_SET);
if(0 && dev->param.is_yaffs2)
{
nread= read(h,tags,sizeof(struct yaffs_ext_tags));
if(nread != sizeof(struct yaffs_ext_tags))
retval = YAFFS_FAIL;
if(yaffs_check_all_ff((u8 *)tags, sizeof(struct yaffs_ext_tags)))
memset(tags, 0, sizeof(struct yaffs_ext_tags));
else
tags->chunk_used = 1;
}
else
{
struct yaffs_packed_tags2 pt;
nread= read(h,&pt,sizeof(pt));
yaffs_unpack_tags2(tags,&pt, !dev->param.no_tags_ecc);
#ifdef SIMULATE_FAILURES
if((nand_chunk >> 6) == 100) {
if(fail300 && tags->ecc_result == YAFFS_ECC_RESULT_NO_ERROR){
tags->ecc_result = YAFFS_ECC_RESULT_FIXED;
fail300 = 0;
}
}
if((nand_chunk >> 6) == 110) {
if(fail320 && tags->ecc_result == YAFFS_ECC_RESULT_NO_ERROR){
tags->ecc_result = YAFFS_ECC_RESULT_FIXED;
fail320 = 0;
}
}
#endif
if(failRead10>0 && nand_chunk == 10){
failRead10--;
nread = 0;
}
if(nread != sizeof(pt))
retval = YAFFS_FAIL;
}
}
}
return retval;
}
static int yaffs_tags_marshall_read(struct yaffs_dev *dev,
int nand_chunk, u8 *data,
struct yaffs_ext_tags *tags)
{
//int retval = 0;
int local_data = 0;
u8 spare_buffer[100];
enum yaffs_ecc_result ecc_result;
struct yaffs_packed_tags2 pt;
int packed_tags_size =
dev->param.no_tags_ecc ? sizeof(pt.t) : sizeof(pt);
void *packed_tags_ptr =
dev->param.no_tags_ecc ? (void *)&pt.t : (void *)&pt;
yaffs_trace(YAFFS_TRACE_MTD,
"yaffs_tags_marshall_read chunk %d data %p tags %p",
nand_chunk, data, tags);
if (dev->param.inband_tags) {
if (!data) {
local_data = 1;
data = yaffs_get_temp_buffer(dev);
}
}
if (dev->param.inband_tags || (data && !tags))
dev->drv.drv_read_chunk_fn(dev, nand_chunk,
data, dev->param.total_bytes_per_chunk,
NULL, 0,
&ecc_result); //TODO check retval
else if (tags)
dev->drv.drv_read_chunk_fn(dev, nand_chunk,
data, dev->param.total_bytes_per_chunk,
spare_buffer, packed_tags_size,
&ecc_result); //TODO check retval
else
BUG();
if (dev->param.inband_tags) {
if (tags) {
struct yaffs_packed_tags2_tags_only *pt2tp;
pt2tp =
(struct yaffs_packed_tags2_tags_only *)
&data[dev->data_bytes_per_chunk];
yaffs_unpack_tags2_tags_only(tags, pt2tp);
}
} else if (tags) {
memcpy(packed_tags_ptr, spare_buffer, packed_tags_size);
yaffs_unpack_tags2(tags, &pt, !dev->param.no_tags_ecc);
}
if (local_data)
yaffs_release_temp_buffer(dev, data);
if (tags && ecc_result == YAFFS_ECC_RESULT_UNFIXED) {
tags->ecc_result = YAFFS_ECC_RESULT_UNFIXED;
dev->n_ecc_unfixed++;
}
if (tags && ecc_result == YAFFS_ECC_RESULT_FIXED) {
if (tags->ecc_result <= YAFFS_ECC_RESULT_NO_ERROR)
tags->ecc_result = YAFFS_ECC_RESULT_FIXED;
dev->n_ecc_fixed++;
}
if (ecc_result < YAFFS_ECC_RESULT_UNFIXED)
return YAFFS_OK;
else
return YAFFS_FAIL;
}
/* NB For use with inband tags....
* We assume that the data buffer is of size total_bytes_per_chunk so that we can also
* use it to load the tags.
*/
int nandmtd2_write_chunk_tags(struct yaffs_dev *dev, int nand_chunk,
const u8 * data,
const struct yaffs_ext_tags *tags)
{
struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
#if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17))
struct mtd_oob_ops ops;
#else
size_t dummy;
#endif
int retval = 0;
loff_t addr;
struct yaffs_packed_tags2 pt;
u8 *encrypted_data = NULL;
int packed_tags_size =
dev->param.no_tags_ecc ? sizeof(pt.t) : sizeof(pt);
void *packed_tags_ptr =
dev->param.no_tags_ecc ? (void *)&pt.t : (void *)&pt;
yaffs_trace(YAFFS_TRACE_MTD,
"nandmtd2_write_chunk_tags chunk %d data %p tags %p",
nand_chunk, data, tags);
addr = ((loff_t) nand_chunk) * dev->param.total_bytes_per_chunk;
/* For yaffs2 writing there must be both data and tags.
* If we're using inband tags, then the tags are stuffed into
* the end of the data buffer.
*/
if (!data || !tags)
BUG();
else if (dev->param.inband_tags) {
struct yaffs_packed_tags2_tags_only *pt2tp;
pt2tp =
(struct yaffs_packed_tags2_tags_only *)(data +
dev->
data_bytes_per_chunk);
yaffs_pack_tags2_tags_only(pt2tp, tags);
} else {
yaffs_pack_tags2(&pt, tags, !dev->param.no_tags_ecc);
}
#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
if (dev->is_encrypted_fs) {
if (dev->param.inband_tags)
BUG();
encrypted_data = yaffs_get_temp_buffer(dev, __LINE__);
memcpy(encrypted_data, data, dev->param.total_bytes_per_chunk);
AES_xts_encrypt(dev->cipher,
encrypted_data, encrypted_data,
nand_chunk * 2, dev->param.total_bytes_per_chunk,
packed_tags_ptr+SEQUENCE_OFFSET,
packed_tags_ptr+SEQUENCE_OFFSET,
(nand_chunk * 2) + 1,
packed_tags_size-SEQUENCE_OFFSET);
}
ops.mode = MTD_OOB_AUTO;
ops.ooblen = (dev->param.inband_tags) ? 0 : packed_tags_size;
ops.len = dev->param.total_bytes_per_chunk;
ops.ooboffs = 0;
ops.datbuf = dev->is_encrypted_fs ? encrypted_data : (u8 *) data;
ops.oobbuf = (dev->param.inband_tags) ? NULL : packed_tags_ptr;
retval = mtd->write_oob(mtd, addr, &ops);
if (dev->is_encrypted_fs && encrypted_data)
yaffs_release_temp_buffer(dev, encrypted_data, __LINE__);
#else
if (!dev->param.inband_tags) {
retval =
mtd->write_ecc(mtd, addr, dev->data_bytes_per_chunk,
&dummy, data, (u8 *) packed_tags_ptr, NULL);
} else {
retval =
mtd->write(mtd, addr, dev->param.total_bytes_per_chunk,
&dummy, data);
}
#endif
if (retval == 0)
return YAFFS_OK;
else
return YAFFS_FAIL;
}
int nandmtd2_read_chunk_tags(struct yaffs_dev *dev, int nand_chunk,
u8 * data, struct yaffs_ext_tags *tags)
{
struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
struct mtd_oob_ops ops;
size_t dummy;
int retval = 0;
int local_data = 0;
loff_t addr = ((loff_t) nand_chunk) * dev->param.total_bytes_per_chunk;
struct yaffs_packed_tags2 pt;
int packed_tags_size =
dev->param.no_tags_ecc ? sizeof(pt.t) : sizeof(pt);
void *packed_tags_ptr =
dev->param.no_tags_ecc ? (void *)&pt.t : (void *)&pt;
yaffs_trace(YAFFS_TRACE_MTD,
"nandmtd2_read_chunk_tags chunk %d data %p tags %p",
nand_chunk, data, tags);
if (dev->param.inband_tags) {
if (!data) {
local_data = 1;
data = yaffs_get_temp_buffer(dev, __LINE__);
}
}
if (dev->param.inband_tags || (data && !tags))
retval = mtd_read(mtd, addr, dev->param.total_bytes_per_chunk,
&dummy, data);
else if (tags) {
#if 1
if(!data )
{
local_data = 1;
data = yaffs_get_temp_buffer(dev, __LINE__);
}
ops.mode = MTD_OPS_AUTO_OOB;
ops.ooblen = packed_tags_size;
ops.ooboffs = 0;
ops.len = dev->data_bytes_per_chunk;
ops.datbuf = data;
ops.oobbuf = yaffs_dev_to_lc(dev)->spare_buffer;
retval = mtd_read_oob(mtd, addr, &ops);
if(retval)
{
printk(KERN_ERR"yaffsdebug mtdiferror %s retval:%d unfixed:%d fixed:%d chunk:%d addr:0x%llx\n",\
(retval == -EUCLEAN)?"fix ecc":"unfix ecc",retval,dev->n_ecc_unfixed,dev->n_ecc_fixed,nand_chunk,addr);
#ifdef YAFFS_MVG_TEST_DEBUG_LOG
if(retval != -EUCLEAN)
{
printk(KERN_ERR"dump checksum_BCH chunk:%d addr:0x%x\n",nand_chunk,addr);
mtk_dump_byte(ops.datbuf,ops.len,0);
printk(KERN_ERR"dump BCH oob\n");
mtk_dump_byte(ops.oobbuf,ops.ooblen,0);
}
#endif
}
#else
ops.mode = MTD_OOB_AUTO;
ops.ooblen = packed_tags_size;
ops.len = data ? dev->data_bytes_per_chunk : packed_tags_size;
ops.ooboffs = 0;
ops.datbuf = data;
ops.oobbuf = yaffs_dev_to_lc(dev)->spare_buffer;
retval = mtd->read_oob(mtd, addr, &ops);
#endif
}
if (dev->param.inband_tags) {
if (tags) {
struct yaffs_packed_tags2_tags_only *pt2tp;
pt2tp =
(struct yaffs_packed_tags2_tags_only *)&data[dev->
data_bytes_per_chunk];
yaffs_unpack_tags2_tags_only(tags, pt2tp);
}
} else {
if (tags) {
memcpy(packed_tags_ptr,
yaffs_dev_to_lc(dev)->spare_buffer,
packed_tags_size);
yaffs_unpack_tags2(tags, &pt, !dev->param.no_tags_ecc);
}
}
if (local_data)
yaffs_release_temp_buffer(dev, data, __LINE__);
if (tags && retval == -EBADMSG
&& tags->ecc_result == YAFFS_ECC_RESULT_NO_ERROR) {
tags->ecc_result = YAFFS_ECC_RESULT_UNFIXED;
dev->n_ecc_unfixed++;
}
if (tags && retval == -EUCLEAN
&& tags->ecc_result == YAFFS_ECC_RESULT_NO_ERROR) {
tags->ecc_result = YAFFS_ECC_RESULT_FIXED;
dev->n_ecc_fixed++;
}
if (retval == 0)
return YAFFS_OK;
else
return YAFFS_FAIL;
}
int ynandif_ReadChunkWithTagsFromNAND(struct yaffs_dev *dev, int nand_chunk,
u8 *data, struct yaffs_ext_tags *tags)
{
struct yaffs_packed_tags2 pt;
int localData = 0;
void *spare = NULL;
unsigned spareSize;
int retval = 0;
int eccStatus; /* 0 = ok, 1 = fixed, -1 = unfixed */
struct ynandif_Geometry *geometry = (struct ynandif_Geometry *)(dev->driver_context);
yaffs_trace(YAFFS_TRACE_MTD,
"nandmtd2_ReadChunkWithTagsFromNAND chunk %d data %p tags %p",
nand_chunk, data, tags);
if (!tags) {
spare = NULL;
spareSize = 0;
} else if (dev->param.inband_tags) {
if (!data) {
localData = 1;
data = yaffs_get_temp_buffer(dev);
}
spare = NULL;
spareSize = 0;
} else {
spare = &pt;
spareSize = sizeof(struct yaffs_packed_tags2);
}
retval = geometry->readChunk(dev, nand_chunk,
data,
data ? dev->param.total_bytes_per_chunk : 0,
spare, spareSize,
&eccStatus);
if (dev->param.inband_tags) {
if (tags) {
struct yaffs_packed_tags2_tags_only *pt2tp;
pt2tp = (struct yaffs_packed_tags2_tags_only *)
&data[dev->data_bytes_per_chunk];
yaffs_unpack_tags2_tags_only(tags, pt2tp);
}
} else {
if (tags)
yaffs_unpack_tags2(tags, &pt, !dev->param.no_tags_ecc);
}
if (tags && tags->chunk_used) {
if (eccStatus < 0 ||
tags->ecc_result == YAFFS_ECC_RESULT_UNFIXED)
tags->ecc_result = YAFFS_ECC_RESULT_UNFIXED;
else if (eccStatus > 0 ||
tags->ecc_result == YAFFS_ECC_RESULT_FIXED)
tags->ecc_result = YAFFS_ECC_RESULT_FIXED;
else
tags->ecc_result = YAFFS_ECC_RESULT_NO_ERROR;
}
if (localData)
yaffs_release_temp_buffer(dev, data);
return retval;
}