Exemple #1
0
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;
}
Exemple #2
0
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;
}
Exemple #4
0
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;
}
Exemple #5
0
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;
}
Exemple #7
0
/* 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;
}
Exemple #9
0
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;
}