LXR uboot/fs/yaffs2/yaffs

   1/*
   2 * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
   3 *
   4 * Copyright (C) 2002-2011 Aleph One Ltd.
   5 *   for Toby Churchill Ltd and Brightstar Engineering
   6 *
   7 * Created by Charles Manning <charles@aleph1.co.uk>
   8 *
   9 * This program is free software; you can redistribute it and/or modify
  10 * it under the terms of the GNU Lesser General Public License version 2.1 as
  11 * published by the Free Software Foundation.
  12 *
  13 * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
  14 */
  15
  16/* This is used to pack YAFFS2 tags, not YAFFS1tags. */
  17
  18#ifndef __YAFFS_PACKEDTAGS2_H__
  19#define __YAFFS_PACKEDTAGS2_H__
  20
  21#include "yaffs_guts.h"
  22#include "yaffs_ecc.h"
  23
  24struct yaffs_packed_tags2_tags_only {
  25        unsigned seq_number;
  26        unsigned obj_id;
  27        unsigned chunk_id;
  28        unsigned n_bytes;
  29};
  30
  31struct yaffs_packed_tags2 {
  32        struct yaffs_packed_tags2_tags_only t;
  33        struct yaffs_ecc_other ecc;
  34};
  35
  36/* Full packed tags with ECC, used for oob tags */
  37void yaffs_pack_tags2(struct yaffs_packed_tags2 *pt,
  38                      const struct yaffs_ext_tags *t, int tags_ecc);
  39void yaffs_unpack_tags2(struct yaffs_ext_tags *t, struct yaffs_packed_tags2 *pt,
  40                        int tags_ecc);
  41
  42/* Only the tags part (no ECC for use with inband tags */
  43void yaffs_pack_tags2_tags_only(struct yaffs_packed_tags2_tags_only *pt,
  44                                const struct yaffs_ext_tags *t);
  45void yaffs_unpack_tags2_tags_only(struct yaffs_ext_tags *t,
  46                                  struct yaffs_packed_tags2_tags_only *pt);
  47#endif
  48