yaffs_packedtags2.h

/*
 * 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 Lesser General Public License version 2.1 as
 * published by the Free Software Foundation.
 *
 * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
 */

/* This is used to pack YAFFS2 tags, not YAFFS1tags. */

#ifndef __YAFFS_PACKEDTAGS2_H__
#define __YAFFS_PACKEDTAGS2_H__

#include "yaffs_guts.h"
#include "yaffs_ecc.h"

struct yaffs_packed_tags2_tags_only {
	unsigned seq_number;
	unsigned obj_id;
	unsigned chunk_id;
	unsigned n_bytes;
};

struct yaffs_packed_tags2 {
	struct yaffs_packed_tags2_tags_only t;
	struct yaffs_ecc_other ecc;
};

/* Full packed tags with ECC, used for oob tags */
void yaffs_pack_tags2(struct yaffs_packed_tags2 *pt,
		      const struct yaffs_ext_tags *t, int tags_ecc);
void yaffs_unpack_tags2(struct yaffs_ext_tags *t, struct yaffs_packed_tags2 *pt,
			int tags_ecc);

/* Only the tags part (no ECC for use with inband tags */
void yaffs_pack_tags2_tags_only(struct yaffs_packed_tags2_tags_only *pt,
				const struct yaffs_ext_tags *t);
void yaffs_unpack_tags2_tags_only(struct yaffs_ext_tags *t,
				  struct yaffs_packed_tags2_tags_only *pt);
#endif