lib/ext2fs/bitmaps.c

   1 /*
   2  * bitmaps.c --- routines to read, write, and manipulate the inode and
   3  * block bitmaps.
   4  *
   5  * Copyright (C) 1993, 1994, 1995, 1996 Theodore Ts'o.
   6  *
   7  * %Begin-Header%
   8  * This file may be redistributed under the terms of the GNU Library
   9  * General Public License, version 2.
  10  * %End-Header%
  11  */
  12
  13 #include <stdio.h>
  14 #include <string.h>
  15 #if HAVE_UNISTD_H
  16 #include <unistd.h>
  17 #endif
  18 #include <fcntl.h>
  19 #include <time.h>
  20 #if HAVE_SYS_STAT_H
  21 #include <sys/stat.h>
  22 #endif
  23 #if HAVE_SYS_TYPES_H
  24 #include <sys/types.h>
  25 #endif
  26
  27 #include "ext2_fs.h"
  28 #include "ext2fs.h"
  29
  30 void ext2fs_free_inode_bitmap(ext2fs_inode_bitmap bitmap)
  31 {
  32         ext2fs_free_generic_bitmap(bitmap);
  33 }
  34
  35 void ext2fs_free_block_bitmap(ext2fs_block_bitmap bitmap)
  36 {
  37         ext2fs_free_generic_bitmap(bitmap);
  38 }
  39
  40 errcode_t ext2fs_copy_bitmap(ext2fs_generic_bitmap src,
  41                              ext2fs_generic_bitmap *dest)
  42 {
  43         return (ext2fs_copy_generic_bitmap(src, dest));
  44 }
  45
  46 void ext2fs_set_bitmap_padding(ext2fs_generic_bitmap map)
  47 {
  48         ext2fs_set_generic_bitmap_padding(map);
  49 }
  50
  51 errcode_t ext2fs_allocate_inode_bitmap(ext2_filsys fs,
  52                                        const char *descr,
  53                                        ext2fs_inode_bitmap *ret)
  54 {
  55         __u32           start, end, real_end;
  56
  57         EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
  58
  59         fs->write_bitmaps = ext2fs_write_bitmaps;
  60
  61         start = 1;
  62         end = fs->super->s_inodes_count;
  63         real_end = (EXT2_INODES_PER_GROUP(fs->super) * fs->group_desc_count);
  64
  65         return (ext2fs_make_generic_bitmap(EXT2_ET_MAGIC_INODE_BITMAP, fs,
  66                                            start, end, real_end,
  67                                            descr, 0, ret));
  68 }
  69
  70 errcode_t ext2fs_allocate_block_bitmap(ext2_filsys fs,
  71                                        const char *descr,
  72                                        ext2fs_block_bitmap *ret)
  73 {
  74         __u32           start, end, real_end;
  75
  76         EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
  77
  78         fs->write_bitmaps = ext2fs_write_bitmaps;
  79
  80         start = fs->super->s_first_data_block;
  81         end = fs->super->s_blocks_count-1;
  82         real_end = (EXT2_BLOCKS_PER_GROUP(fs->super)
  83                     * fs->group_desc_count)-1 + start;
  84
  85         return (ext2fs_make_generic_bitmap(EXT2_ET_MAGIC_BLOCK_BITMAP, fs,
  86                                            start, end, real_end,
  87                                            descr, 0, ret));
  88 }
  89
  90 errcode_t ext2fs_fudge_inode_bitmap_end(ext2fs_inode_bitmap bitmap,
  91                                         ext2_ino_t end, ext2_ino_t *oend)
  92 {
  93
  94         return (ext2fs_fudge_generic_bitmap_end(bitmap,
  95                                                 EXT2_ET_MAGIC_INODE_BITMAP,
  96                                                 EXT2_ET_FUDGE_INODE_BITMAP_END,
  97                                                 end, oend));
  98 }
  99
 100 errcode_t ext2fs_fudge_block_bitmap_end(ext2fs_block_bitmap bitmap,
 101                                         blk_t end, blk_t *oend)
 102 {
 103         return (ext2fs_fudge_generic_bitmap_end(bitmap,
 104                                                 EXT2_ET_MAGIC_BLOCK_BITMAP,
 105                                                 EXT2_ET_FUDGE_BLOCK_BITMAP_END,
 106                                                 end, oend));
 107 }
 108
 109 void ext2fs_clear_inode_bitmap(ext2fs_inode_bitmap bitmap)
 110 {
 111         ext2fs_clear_generic_bitmap(bitmap);
 112 }
 113
 114 void ext2fs_clear_block_bitmap(ext2fs_block_bitmap bitmap)
 115 {
 116         ext2fs_clear_generic_bitmap(bitmap);
 117 }
 118
 119 errcode_t ext2fs_resize_inode_bitmap(__u32 new_end, __u32 new_real_end,
 120                                      ext2fs_inode_bitmap bmap)
 121 {
 122         return (ext2fs_resize_generic_bitmap(EXT2_ET_MAGIC_INODE_BITMAP,
 123                                              new_end, new_real_end, bmap));
 124 }
 125
 126 errcode_t ext2fs_resize_block_bitmap(__u32 new_end, __u32 new_real_end,
 127                                      ext2fs_block_bitmap bmap)
 128 {
 129         return (ext2fs_resize_generic_bitmap(EXT2_ET_MAGIC_BLOCK_BITMAP,
 130                                              new_end, new_real_end, bmap));
 131 }
 132
 133 errcode_t ext2fs_compare_block_bitmap(ext2fs_block_bitmap bm1,
 134                                       ext2fs_block_bitmap bm2)
 135 {
 136         return (ext2fs_compare_generic_bitmap(EXT2_ET_MAGIC_BLOCK_BITMAP,
 137                                               EXT2_ET_NEQ_BLOCK_BITMAP,
 138                                               bm1, bm2));
 139 }
 140
 141 errcode_t ext2fs_compare_inode_bitmap(ext2fs_inode_bitmap bm1,
 142                                       ext2fs_inode_bitmap bm2)
 143 {
 144         return (ext2fs_compare_generic_bitmap(EXT2_ET_MAGIC_INODE_BITMAP,
 145                                               EXT2_ET_NEQ_INODE_BITMAP,
 146                                               bm1, bm2));
 147 }
 148
 149 errcode_t ext2fs_set_inode_bitmap_range(ext2fs_inode_bitmap bmap,
 150                                         ext2_ino_t start, unsigned int num,
 151                                         void *in)
 152 {
 153         return (ext2fs_set_generic_bitmap_range(bmap,
 154                                                 EXT2_ET_MAGIC_INODE_BITMAP,
 155                                                 start, num, in));
 156 }
 157
 158 errcode_t ext2fs_get_inode_bitmap_range(ext2fs_inode_bitmap bmap,
 159                                         ext2_ino_t start, unsigned int num,
 160                                         void *out)
 161 {
 162         return (ext2fs_get_generic_bitmap_range(bmap,
 163                                                 EXT2_ET_MAGIC_INODE_BITMAP,
 164                                                 start, num, out));
 165 }
 166
 167 errcode_t ext2fs_set_block_bitmap_range(ext2fs_block_bitmap bmap,
 168                                         blk_t start, unsigned int num,
 169                                         void *in)
 170 {
 171         return (ext2fs_set_generic_bitmap_range(bmap,
 172                                                 EXT2_ET_MAGIC_BLOCK_BITMAP,
 173                                                 start, num, in));
 174 }
 175
 176 errcode_t ext2fs_get_block_bitmap_range(ext2fs_block_bitmap bmap,
 177                                         blk_t start, unsigned int num,
 178                                         void *out)
 179 {
 180         return (ext2fs_get_generic_bitmap_range(bmap,
 181                                                 EXT2_ET_MAGIC_BLOCK_BITMAP,
 182                                                 start, num, out));
 183 }