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
21struct 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
31static 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
48int 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_reserved_char_pad, 1);
116	check_field(s_reserved_pad, 2);
117	check_field(s_kbytes_written, 8);
118	check_field(s_snapshot_inum, 4);
119	check_field(s_snapshot_id, 4);
120	check_field(s_snapshot_r_blocks_count, 8);
121	check_field(s_snapshot_list, 4);
122	check_field(s_error_count, 4);
123	check_field(s_first_error_time, 4);
124	check_field(s_first_error_ino, 4);
125	check_field(s_first_error_block, 8);
126	check_field(s_first_error_func, 32);
127	check_field(s_first_error_line, 4);
128	check_field(s_last_error_time, 4);
129	check_field(s_last_error_ino, 4);
130	check_field(s_last_error_line, 4);
131	check_field(s_last_error_block, 8);
132	check_field(s_last_error_func, 32);
133	check_field(s_mount_opts, 64);
134	check_field(s_usr_quota_inum, 4);
135	check_field(s_grp_quota_inum, 4);
136	check_field(s_overhead_blocks, 4);
137	check_field(s_reserved, 108 * 4);
138	check_field(s_checksum, 4);
139	do_field("Superblock end", 0, 0, cur_offset, 1024);
140#endif
141	return 0;
142}
143