lib/ext2fs/bmap64.h

   1 /*
   2  * bmap64.h --- 64-bit bitmap structure
   3  *
   4  * Copyright (C) 2007, 2008 Theodore Ts'o.
   5  *
   6  * %Begin-Header%
   7  * This file may be redistributed under the terms of the GNU Public
   8  * License.
   9  * %End-Header%
  10  */
  11
  12 struct ext2fs_struct_generic_bitmap {
  13         errcode_t               magic;
  14         ext2_filsys             fs;
  15         struct ext2_bitmap_ops  *bitmap_ops;
  16         int                     flags;
  17         __u64                   start, end;
  18         __u64                   real_end;
  19         int                     cluster_bits;
  20         char                    *description;
  21         void                    *private;
  22         errcode_t               base_error_code;
  23 };
  24
  25 #define EXT2FS_IS_32_BITMAP(bmap) \
  26         (((bmap)->magic == EXT2_ET_MAGIC_GENERIC_BITMAP) || \
  27          ((bmap)->magic == EXT2_ET_MAGIC_BLOCK_BITMAP) || \
  28          ((bmap)->magic == EXT2_ET_MAGIC_INODE_BITMAP))
  29
  30 #define EXT2FS_IS_64_BITMAP(bmap) \
  31         (((bmap)->magic == EXT2_ET_MAGIC_GENERIC_BITMAP64) || \
  32          ((bmap)->magic == EXT2_ET_MAGIC_BLOCK_BITMAP64) || \
  33          ((bmap)->magic == EXT2_ET_MAGIC_INODE_BITMAP64))
  34
  35 struct ext2_bitmap_ops {
  36         int     type;
  37         /* Generic bmap operators */
  38         errcode_t (*new_bmap)(ext2_filsys fs, ext2fs_generic_bitmap bmap);
  39         void    (*free_bmap)(ext2fs_generic_bitmap bitmap);
  40         errcode_t (*copy_bmap)(ext2fs_generic_bitmap src,
  41                              ext2fs_generic_bitmap dest);
  42         errcode_t (*resize_bmap)(ext2fs_generic_bitmap bitmap,
  43                                __u64 new_end,
  44                                __u64 new_real_end);
  45         /* bit set/test operators */
  46         int     (*mark_bmap)(ext2fs_generic_bitmap bitmap, __u64 arg);
  47         int     (*unmark_bmap)(ext2fs_generic_bitmap bitmap, __u64 arg);
  48         int     (*test_bmap)(ext2fs_generic_bitmap bitmap, __u64 arg);
  49         void    (*mark_bmap_extent)(ext2fs_generic_bitmap bitmap, __u64 arg,
  50                                     unsigned int num);
  51         void    (*unmark_bmap_extent)(ext2fs_generic_bitmap bitmap, __u64 arg,
  52                                       unsigned int num);
  53         int     (*test_clear_bmap_extent)(ext2fs_generic_bitmap bitmap,
  54                                           __u64 arg, unsigned int num);
  55         errcode_t (*set_bmap_range)(ext2fs_generic_bitmap bitmap,
  56                                     __u64 start, size_t num, void *in);
  57         errcode_t (*get_bmap_range)(ext2fs_generic_bitmap bitmap,
  58                                     __u64 start, size_t num, void *out);
  59         void (*clear_bmap)(ext2fs_generic_bitmap bitmap);
  60 };
  61
  62 extern struct ext2_bitmap_ops ext2fs_blkmap64_bitarray;