blob: eb9114f1515d7d43b80e159d845589db87cd8ab1 [file] [log] [blame]
/*
* This testing program makes sure superblock size is 1024 bytes long
*
* Copyright (C) 2007 by Theodore Ts'o.
*
* %Begin-Header%
* This file may be redistributed under the terms of the GNU Library
* General Public License, version 2.
* %End-Header%
*/
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include "ext2_fs.h"
#define sb_struct ext2_super_block
#define sb_struct_name "ext2_super_block"
struct sb_struct sb;
int verbose = 0;
#define offsetof(type, member) __builtin_offsetof (type, member)
#define check_field(x) cur_offset = do_field(#x, sizeof(sb.x), \
offsetof(struct sb_struct, x), \
cur_offset)
static int do_field(const char *field, size_t size, int offset, int cur_offset)
{
if (offset != cur_offset) {
printf("Warning! Unexpected offset at %s\n", field);
exit(1);
}
printf("%8d %-30s %3u\n", offset, field, (unsigned) size);
return offset + size;
}
void check_superblock_fields()
{
#if (__GNUC__ >= 4)
int cur_offset = 0;
printf("%8s %-30s %3s\n", "offset", "field", "size");
check_field(s_inodes_count);
check_field(s_blocks_count);
check_field(s_r_blocks_count);
check_field(s_free_blocks_count);
check_field(s_free_inodes_count);
check_field(s_first_data_block);
check_field(s_log_block_size);
check_field(s_log_frag_size);
check_field(s_blocks_per_group);
check_field(s_frags_per_group);
check_field(s_inodes_per_group);
check_field(s_mtime);
check_field(s_wtime);
check_field(s_mnt_count);
check_field(s_max_mnt_count);
check_field(s_magic);
check_field(s_state);
check_field(s_errors);
check_field(s_minor_rev_level);
check_field(s_lastcheck);
check_field(s_checkinterval);
check_field(s_creator_os);
check_field(s_rev_level);
check_field(s_def_resuid);
check_field(s_def_resgid);
check_field(s_first_ino);
check_field(s_inode_size);
check_field(s_block_group_nr);
check_field(s_feature_compat);
check_field(s_feature_incompat);
check_field(s_feature_ro_compat);
check_field(s_uuid);
check_field(s_volume_name);
check_field(s_last_mounted);
check_field(s_algorithm_usage_bitmap);
check_field(s_prealloc_blocks);
check_field(s_prealloc_dir_blocks);
check_field(s_reserved_gdt_blocks);
check_field(s_journal_uuid);
check_field(s_journal_inum);
check_field(s_journal_dev);
check_field(s_last_orphan);
check_field(s_hash_seed);
check_field(s_def_hash_version);
check_field(s_jnl_backup_type);
check_field(s_desc_size);
check_field(s_default_mount_opts);
check_field(s_first_meta_bg);
check_field(s_mkfs_time);
check_field(s_jnl_blocks);
check_field(s_blocks_count_hi);
check_field(s_r_blocks_count_hi);
check_field(s_free_blocks_hi);
check_field(s_min_extra_isize);
check_field(s_want_extra_isize);
check_field(s_flags);
check_field(s_raid_stride);
check_field(s_mmp_interval);
check_field(s_mmp_block);
check_field(s_raid_stripe_width);
check_field(s_log_groups_per_flex);
check_field(s_reserved_char_pad);
check_field(s_reserved_pad);
check_field(s_kbytes_written);
check_field(s_snapshot_inum);
check_field(s_snapshot_id);
check_field(s_snapshot_r_blocks_count);
check_field(s_snapshot_list);
check_field(s_error_count);
check_field(s_first_error_time);
check_field(s_first_error_ino);
check_field(s_first_error_block);
check_field(s_first_error_func);
check_field(s_first_error_line);
check_field(s_last_error_time);
check_field(s_last_error_ino);
check_field(s_last_error_line);
check_field(s_last_error_block);
check_field(s_last_error_func);
check_field(s_mount_opts);
check_field(s_reserved);
printf("Ending offset is %d\n\n", cur_offset);
#endif
}
int main(int argc, char **argv)
{
int s = sizeof(struct sb_struct);
check_superblock_fields();
printf("Size of struct %s is %d\n", sb_struct_name, s);
if (s != 1024) {
exit(1);
}
exit(0);
}