3.1.35. s_algo_bitmap.............................................................................................................18
3.1.36. s_prealloc_blocks .......................................................................................................18
3.1.37. s_prealloc_dir_blocks.................................................................................................18
3.1.38. s_journal_uuid ............................................................................................................18
3.1.39. s_journal_inum ...........................................................................................................19
3.1.40. s_journal_dev..............................................................................................................19
3.1.41. s_last_orphan..............................................................................................................19
3.1.42. s_hash_seed ................................................................................................................19
3.1.43. s_def_hash_version ....................................................................................................19
3.1.44. s_default_mount_options ...........................................................................................19
3.1.45. s_first_meta_bg...........................................................................................................19
3.2. Block Group Descriptor Table ..................................................................................................19
3.2.1. bg_block_bitmap ..........................................................................................................20
3.2.2. bg_inode_bitmap ..........................................................................................................20
3.2.3. bg_inode_table .............................................................................................................21
3.2.4. bg_free_blocks_count...................................................................................................21
3.2.5. bg_free_inodes_count...................................................................................................21
3.2.6. bg_used_dirs_count......................................................................................................21
3.2.7. bg_pad ..........................................................................................................................21
3.2.8. bg_reserved...................................................................................................................21
3.3. Block Bitmap ............................................................................................................................21
3.4. Inode Bitmap.............................................................................................................................22
3.5. Inode Table................................................................................................................................22
3.5.1. i_mode ..........................................................................................................................23
3.5.2. i_uid..............................................................................................................................24
3.5.3. i_size.............................................................................................................................24
3.5.4. i_atime ..........................................................................................................................24
3.5.5. i_ctime ..........................................................................................................................24
3.5.6. i_mtime.........................................................................................................................24
3.5.7. i_dtime..........................................................................................................................25
3.5.8. i_gid..............................................................................................................................25
3.5.9. i_links_count ................................................................................................................25
3.5.10. i_blocks.......................................................................................................................25
3.5.11. i_flags .........................................................................................................................25
3.5.12. i_osd1 .........................................................................................................................26
3.5.13. i_block ........................................................................................................................26
3.5.14. i_generation ................................................................................................................27
3.5.15. i_file_acl .....................................................................................................................27
3.5.16. i_dir_acl......................................................................................................................27
3.5.17. i_faddr.........................................................................................................................28
3.5.18. Inode i_osd2 Structure................................................................................................28
3.6. Locating an Inode......................................................................................................................30
4. Directory Structure..............................................................................................................................32
4.1. Linked List Directory................................................................................................................32
4.1.1. inode .............................................................................................................................32
4.1.2. rec_len ..........................................................................................................................32
4.1.3. name_len.......................................................................................................................33
iv
