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