target/linux/generic/files/fs/yaffs2/yaffs_packedtags2.h

   1 /*
   2  * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
   3  *
   4  * Copyright (C) 2002-2010 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
  24 typedef struct {
  25         unsigned seq_number;
  26         unsigned obj_id;
  27         unsigned chunk_id;
  28         unsigned n_bytes;
  29 } yaffs_PackedTags2TagsPart;
  30
  31 typedef struct {
  32         yaffs_PackedTags2TagsPart t;
  33         yaffs_ECCOther ecc;
  34 } yaffs_PackedTags2;
  35
  36 /* Full packed tags with ECC, used for oob tags */
  37 void yaffs_PackTags2(yaffs_PackedTags2 *pt, const yaffs_ext_tags *t, int tagsECC);
  38 void yaffs_unpack_tags2(yaffs_ext_tags *t, yaffs_PackedTags2 *pt, int tagsECC);
  39
  40 /* Only the tags part (no ECC for use with inband tags */
  41 void yaffs_PackTags2TagsPart(yaffs_PackedTags2TagsPart *pt, const yaffs_ext_tags *t);
  42 void yaffs_unpack_tags2tags_part(yaffs_ext_tags *t, yaffs_PackedTags2TagsPart *pt);
  43 #endif