fs/yaffs2/yaffs_yaffs1.c - uboot/armada - Git at Google

 /*
  * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
  *
  * Copyright (C) 2002-2011 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 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;

 			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++;

 				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;
 }
	/*
	* YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
	*
	* Copyright (C) 2002-2011 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 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;

	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++;

	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;
	}