+ uint8_t prealloc_blocks;
+ uint8_t prealloc_dir_blocks;
+ __le16 reserved_gdt_blocks;
+ uint8_t journal_uuid[16];
+ __le32 journal_inode;
+ __le32 journal_dev;
+ __le32 last_orphan;
+ __le32 hash_seed[4];
+ uint8_t default_hash_version;
+ uint8_t journal_backup_type;
+ __le16 descriptor_size;
+ __le32 default_mount_options;
+ __le32 first_meta_block_group;
+ __le32 mkfs_time;
+ __le32 journal_blocks[17];
+ __le32 total_blocks_high;
+ __le32 reserved_blocks_high;
+ __le32 free_blocks_high;
+ __le16 min_extra_inode_size;
+ __le16 want_extra_inode_size;
+ __le32 flags;
+ __le16 raid_stride;
+ __le16 mmp_interval;
+ __le64 mmp_block;
+ __le32 raid_stripe_width;
+ uint8_t log2_groups_per_flex;
+ uint8_t checksum_type;