1 /* 2 * This testing program makes sure superblock size is 1024 bytes long 3 * 4 * Copyright (C) 2007 by Theodore Ts'o. 5 * 6 * %Begin-Header% 7 * This file may be redistributed under the terms of the GNU Library 8 * General Public License, version 2. 9 * %End-Header% 10 */ 11 12 #include <stdio.h> 13 #include <unistd.h> 14 #include <stdlib.h> 15 16 #include "ext2_fs.h" 17 18 #define sb_struct ext2_super_block 19 #define sb_struct_name "ext2_super_block" 20 21 struct sb_struct sb; 22 23 #ifndef offsetof 24 #define offsetof(type, member) __builtin_offsetof (type, member) 25 #endif 26 27 #define check_field(x, s) cur_offset = do_field(#x, s, sizeof(sb.x), \ 28 offsetof(struct sb_struct, x), \ 29 cur_offset) 30 31 static int do_field(const char *field, unsigned size, unsigned cur_size, 32 unsigned offset, unsigned cur_offset) 33 { 34 if (size != cur_size) { 35 printf("error: %s size %u should be %u\n", 36 field, cur_size, size); 37 exit(1); 38 } 39 if (offset != cur_offset) { 40 printf("error: %s offset %u should be %u\n", 41 field, cur_offset, offset); 42 exit(1); 43 } 44 printf("%8d %-30s %3u\n", offset, field, size); 45 return offset + size; 46 } 47 48 int main(int argc, char **argv) 49 { 50 #if (__GNUC__ >= 4) 51 int cur_offset = 0; 52 53 printf("%8s %-30s %3s\n", "offset", "field", "size"); 54 check_field(s_inodes_count, 4); 55 check_field(s_blocks_count, 4); 56 check_field(s_r_blocks_count, 4); 57 check_field(s_free_blocks_count, 4); 58 check_field(s_free_inodes_count, 4); 59 check_field(s_first_data_block, 4); 60 check_field(s_log_block_size, 4); 61 check_field(s_log_cluster_size, 4); 62 check_field(s_blocks_per_group, 4); 63 check_field(s_clusters_per_group, 4); 64 check_field(s_inodes_per_group, 4); 65 check_field(s_mtime, 4); 66 check_field(s_wtime, 4); 67 check_field(s_mnt_count, 2); 68 check_field(s_max_mnt_count, 2); 69 check_field(s_magic, 2); 70 check_field(s_state, 2); 71 check_field(s_errors, 2); 72 check_field(s_minor_rev_level, 2); 73 check_field(s_lastcheck, 4); 74 check_field(s_checkinterval, 4); 75 check_field(s_creator_os, 4); 76 check_field(s_rev_level, 4); 77 check_field(s_def_resuid, 2); 78 check_field(s_def_resgid, 2); 79 check_field(s_first_ino, 4); 80 check_field(s_inode_size, 2); 81 check_field(s_block_group_nr, 2); 82 check_field(s_feature_compat, 4); 83 check_field(s_feature_incompat, 4); 84 check_field(s_feature_ro_compat, 4); 85 check_field(s_uuid, 16); 86 check_field(s_volume_name, 16); 87 check_field(s_last_mounted, 64); 88 check_field(s_algorithm_usage_bitmap, 4); 89 check_field(s_prealloc_blocks, 1); 90 check_field(s_prealloc_dir_blocks, 1); 91 check_field(s_reserved_gdt_blocks, 2); 92 check_field(s_journal_uuid, 16); 93 check_field(s_journal_inum, 4); 94 check_field(s_journal_dev, 4); 95 check_field(s_last_orphan, 4); 96 check_field(s_hash_seed, 4 * 4); 97 check_field(s_def_hash_version, 1); 98 check_field(s_jnl_backup_type, 1); 99 check_field(s_desc_size, 2); 100 check_field(s_default_mount_opts, 4); 101 check_field(s_first_meta_bg, 4); 102 check_field(s_mkfs_time, 4); 103 check_field(s_jnl_blocks, 17 * 4); 104 check_field(s_blocks_count_hi, 4); 105 check_field(s_r_blocks_count_hi, 4); 106 check_field(s_free_blocks_hi, 4); 107 check_field(s_min_extra_isize, 2); 108 check_field(s_want_extra_isize, 2); 109 check_field(s_flags, 4); 110 check_field(s_raid_stride, 2); 111 check_field(s_mmp_update_interval, 2); 112 check_field(s_mmp_block, 8); 113 check_field(s_raid_stripe_width, 4); 114 check_field(s_log_groups_per_flex, 1); 115 check_field(s_checksum_type, 1); 116 check_field(s_encryption_level, 1); 117 check_field(s_reserved_pad, 1); 118 check_field(s_kbytes_written, 8); 119 check_field(s_snapshot_inum, 4); 120 check_field(s_snapshot_id, 4); 121 check_field(s_snapshot_r_blocks_count, 8); 122 check_field(s_snapshot_list, 4); 123 check_field(s_error_count, 4); 124 check_field(s_first_error_time, 4); 125 check_field(s_first_error_ino, 4); 126 check_field(s_first_error_block, 8); 127 check_field(s_first_error_func, 32); 128 check_field(s_first_error_line, 4); 129 check_field(s_last_error_time, 4); 130 check_field(s_last_error_ino, 4); 131 check_field(s_last_error_line, 4); 132 check_field(s_last_error_block, 8); 133 check_field(s_last_error_func, 32); 134 check_field(s_mount_opts, 64); 135 check_field(s_usr_quota_inum, 4); 136 check_field(s_grp_quota_inum, 4); 137 check_field(s_overhead_blocks, 4); 138 check_field(s_backup_bgs, 8); 139 check_field(s_encrypt_algos, 4); 140 check_field(s_encrypt_pw_salt, 16); 141 check_field(s_lpf_ino, 4); 142 check_field(s_reserved, 100 * 4); 143 check_field(s_checksum, 4); 144 do_field("Superblock end", 0, 0, cur_offset, 1024); 145 #endif 146 return 0; 147 } 148
