Internals of ext2fs

Superblocks

Here it is from include/linux/fs.h:

      struct super_block {
        struct list_head        s_list;         /* Keep this first */
        kdev_t                  s_dev;
        unsigned long           s_blocksize;
        unsigned char           s_blocksize_bits;
        unsigned char           s_dirt;
        unsigned long long      s_maxbytes;     /* Max file size */
        struct file_system_type *s_type;
        struct super_operations *s_op;
        struct dquot_operations *dq_op;
        unsigned long           s_flags;
        unsigned long           s_magic;
        struct dentry           *s_root;
        ...

        union {
                ...
                struct ext2_sb_info     ext2_sb;
                ...
        } u;

...

};

How is this created?
Warning: Three-slide digression comming up