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 ext2_bmap_statistics {
  13         int             type;
  14         struct timeval  created;
  15
  16 #ifdef BMAP_STATS_OPS
  17         unsigned long   copy_count;
  18         unsigned long   resize_count;
  19         unsigned long   mark_count;
  20         unsigned long   unmark_count;
  21         unsigned long   test_count;
  22         unsigned long   mark_ext_count;
  23         unsigned long   unmark_ext_count;
  24         unsigned long   test_ext_count;
  25         unsigned long   set_range_count;
  26         unsigned long   get_range_count;
  27         unsigned long   clear_count;
  28
  29         blk64_t         last_marked;
  30         blk64_t         last_tested;
  31         blk64_t         mark_back;
  32         blk64_t         test_back;
  33
  34         unsigned long   mark_seq;
  35         unsigned long   test_seq;
  36 #endif /* BMAP_STATS_OPS */
  37 };
  38
  39
  40 struct ext2fs_struct_generic_bitmap {
  41         errcode_t               magic;
  42         ext2_filsys             fs;
  43         struct ext2_bitmap_ops  *bitmap_ops;
  44         int                     flags;
  45         __u64                   start, end;
  46         __u64                   real_end;
  47         int                     cluster_bits;
  48         char                    *description;
  49         void                    *private;
  50         errcode_t               base_error_code;
  51 #ifdef BMAP_STATS
  52         struct ext2_bmap_statistics     stats;
  53 #endif
  54 };
  55
  56 #define EXT2FS_IS_32_BITMAP(bmap) \
  57         (((bmap)->magic == EXT2_ET_MAGIC_GENERIC_BITMAP) || \
  58          ((bmap)->magic == EXT2_ET_MAGIC_BLOCK_BITMAP) || \
  59          ((bmap)->magic == EXT2_ET_MAGIC_INODE_BITMAP))
  60
  61 #define EXT2FS_IS_64_BITMAP(bmap) \
  62         (((bmap)->magic == EXT2_ET_MAGIC_GENERIC_BITMAP64) || \
  63          ((bmap)->magic == EXT2_ET_MAGIC_BLOCK_BITMAP64) || \
  64          ((bmap)->magic == EXT2_ET_MAGIC_INODE_BITMAP64))
  65
  66 struct ext2_bitmap_ops {
  67         int     type;
  68         /* Generic bmap operators */
  69         errcode_t (*new_bmap)(ext2_filsys fs, ext2fs_generic_bitmap bmap);
  70         void    (*free_bmap)(ext2fs_generic_bitmap bitmap);
  71         errcode_t (*copy_bmap)(ext2fs_generic_bitmap src,
  72                              ext2fs_generic_bitmap dest);
  73         errcode_t (*resize_bmap)(ext2fs_generic_bitmap bitmap,
  74                                __u64 new_end,
  75                                __u64 new_real_end);
  76         /* bit set/test operators */
  77         int     (*mark_bmap)(ext2fs_generic_bitmap bitmap, __u64 arg);
  78         int     (*unmark_bmap)(ext2fs_generic_bitmap bitmap, __u64 arg);
  79         int     (*test_bmap)(ext2fs_generic_bitmap bitmap, __u64 arg);
  80         void    (*mark_bmap_extent)(ext2fs_generic_bitmap bitmap, __u64 arg,
  81                                     unsigned int num);
  82         void    (*unmark_bmap_extent)(ext2fs_generic_bitmap bitmap, __u64 arg,
  83                                       unsigned int num);
  84         int     (*test_clear_bmap_extent)(ext2fs_generic_bitmap bitmap,
  85                                           __u64 arg, unsigned int num);
  86         errcode_t (*set_bmap_range)(ext2fs_generic_bitmap bitmap,
  87                                     __u64 start, size_t num, void *in);
  88         errcode_t (*get_bmap_range)(ext2fs_generic_bitmap bitmap,
  89                                     __u64 start, size_t num, void *out);
  90         void (*clear_bmap)(ext2fs_generic_bitmap bitmap);
  91         void (*print_stats)(ext2fs_generic_bitmap);
  92
  93         /* Find the first zero bit between start and end, inclusive.
  94          * May be NULL, in which case a generic function is used. */
  95         errcode_t (*find_first_zero)(ext2fs_generic_bitmap bitmap,
  96                                      __u64 start, __u64 end, __u64 *out);
  97         /* Find the first set bit between start and end, inclusive.
  98          * May be NULL, in which case a generic function is used. */
  99         errcode_t (*find_first_set)(ext2fs_generic_bitmap bitmap,
 100                                     __u64 start, __u64 end, __u64 *out);
 101 };
 102
 103 extern struct ext2_bitmap_ops ext2fs_blkmap64_bitarray;
 104 extern struct ext2_bitmap_ops ext2fs_blkmap64_rbtree;