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 Public 9 * License. 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 } 184
