* 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 Public
- * License.
+ * This file may be redistributed under the terms of the GNU Library
+ * General Public License, version 2.
* %End-Header%
*/
#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_cluster_size);
+ check_field(s_blocks_per_group);
+ check_field(s_clusters_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_usr_quota_inum);
+ check_field(s_grp_quota_inum);
+ check_field(s_reserved);
+ printf("Ending offset is %d\n\n", cur_offset);
+#endif
+}
+
+
int main(int argc, char **argv)
{
- int s = sizeof(struct ext2_super_block);
+ int s = sizeof(struct sb_struct);
- printf("Size of struct ext2_super_block is %d\n", s);
+ check_superblock_fields();
+ printf("Size of struct %s is %d\n", sb_struct_name, s);
if (s != 1024) {
exit(1);
}
exit(0);
}
-