yaffs_packedtags2.h 1.4 KB

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  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. /* This is used to pack YAFFS2 tags, not YAFFS1tags. */
  16. #ifndef __YAFFS_PACKEDTAGS2_H__
  17. #define __YAFFS_PACKEDTAGS2_H__
  18. #include "yaffs_guts.h"
  19. #include "yaffs_ecc.h"
  20. struct yaffs_packed_tags2_tags_only {
  21. unsigned seq_number;
  22. unsigned obj_id;
  23. unsigned chunk_id;
  24. unsigned n_bytes;
  25. };
  26. struct yaffs_packed_tags2 {
  27. struct yaffs_packed_tags2_tags_only t;
  28. struct yaffs_ecc_other ecc;
  29. };
  30. /* Full packed tags with ECC, used for oob tags */
  31. void yaffs_pack_tags2(struct yaffs_packed_tags2 *pt,
  32. const struct yaffs_ext_tags *t, int tags_ecc);
  33. void yaffs_unpack_tags2(struct yaffs_ext_tags *t, struct yaffs_packed_tags2 *pt,
  34. int tags_ecc);
  35. /* Only the tags part (no ECC for use with inband tags */
  36. void yaffs_pack_tags2_tags_only(struct yaffs_packed_tags2_tags_only *pt,
  37. const struct yaffs_ext_tags *t);
  38. void yaffs_unpack_tags2_tags_only(struct yaffs_ext_tags *t,
  39. struct yaffs_packed_tags2_tags_only *pt);
  40. #endif