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-rw-r--r--fs/yaffs2/yaffs_yaffs1.c433
1 files changed, 0 insertions, 433 deletions
diff --git a/fs/yaffs2/yaffs_yaffs1.c b/fs/yaffs2/yaffs_yaffs1.c
deleted file mode 100644
index 9eb6030..0000000
--- a/fs/yaffs2/yaffs_yaffs1.c
+++ /dev/null
@@ -1,433 +0,0 @@
-/*
- * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
- *
- * Copyright (C) 2002-2010 Aleph One Ltd.
- * for Toby Churchill Ltd and Brightstar Engineering
- *
- * Created by Charles Manning <charles@aleph1.co.uk>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#include "yaffs_yaffs1.h"
-#include "yportenv.h"
-#include "yaffs_trace.h"
-#include "yaffs_bitmap.h"
-#include "yaffs_getblockinfo.h"
-#include "yaffs_nand.h"
-#include "yaffs_attribs.h"
-
-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;
- struct yaffs_obj *hard_list = NULL;
- 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, __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;
-
- 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_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 */
- 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;
- /* 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,
- 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 = 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 *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, another 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);
-
- 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 list_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 *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, __LINE__);
-
- if (alloc_failed)
- return YAFFS_FAIL;
-
- yaffs_trace(YAFFS_TRACE_SCAN, "yaffs1_scan ends");
-
- return YAFFS_OK;
-}
generated by cgit v1.1 at 2024-04-24 03:50:51 +0000