This is a preparation for adding bad images fsck testcase. There is
no debugfs tools (for example: debugfs[ext4], xfs_db) for UBIFS, so
there is no way to inject precise corruption into UBIFS image, we have
to prepare inconsistent UBIFS images in advance like e2fsprogs[1] does.
(Goto [2] to see how to generate inconsistent UBIFS images).
Original UBIFS image content:
/
├── corrupt_file (xattr - user.corrupt:123, 2K data)
├── dir
│ ├── block_dev
│ ├── char_dev
│ ├── dir
│ └── file (content: '123')
├── hardl_corrupt_file => corrupt_file
└── softl_corrupt_file -> corrupt_file
Here's a descriptons of the various testing images:
=========================================================================
image | Description | expectancy
-------------------------------------------------------------------------
good | good image contains | fsck success, fs content is
| kinds of files. | not changed.
-------------------------------------------------------------------------
sb_fanout | invalid fanout in | fsck failed.
| superblock. |
-------------------------------------------------------------------------
sb_fmt_version | invalid fmt_version | fsck failed.
| in superblock. |
-------------------------------------------------------------------------
sb_leb_size | invalid leb_size in | fsck failed.
| superblock. |
-------------------------------------------------------------------------
sb_log_lebs | invalid log lebs in | fsck failed.
| superblock. |
-------------------------------------------------------------------------
sb_min_io_size | invalid min_io_size | fsck failed.
| in superblock. |
-------------------------------------------------------------------------
master_highest_inum | invalid highest_inum| fsck success, fs content is
| in master nodes. | not changed.
-------------------------------------------------------------------------
master_lpt | bad lpt pos in | fsck success, fs content is
| master nodes. | not changed.
-------------------------------------------------------------------------
master_tnc | bad tnc pos in | fsck success, fs content is
| master nodes. | not changed.
-------------------------------------------------------------------------
master_total_dead | bad total_dead in | fsck success, fs content is
| master nodes. | not changed.
-------------------------------------------------------------------------
master_total_dirty | bad total_dirty in | fsck success, fs content is
| master nodes. | not changed.
-------------------------------------------------------------------------
master_total_free | bad total_free in | fsck success, fs content is
| master nodes. | not changed.
-------------------------------------------------------------------------
journal_log | corrupted log area. | fsck success, fs content is
| | not changed.
-------------------------------------------------------------------------
journal_bud | corrupted bud area. | fsck success, file data is
| | lost.
-------------------------------------------------------------------------
orphan_node | bad orphan node. | fsck success, file is
| | deleted as expected.
-------------------------------------------------------------------------
lpt_dirty | bad dirty in pnode. | fsck success, fs content is
| | not changed.
-------------------------------------------------------------------------
lpt_flags | bad flags in pnode | fsck success, fs content is
| (eg. index). | not changed.
-------------------------------------------------------------------------
lpt_free | bad free in pnode. | fsck success, fs content is
| | not changed.
-------------------------------------------------------------------------
lpt_pos | bad pos in nnode. | fsck success, fs content is
| | not changed.
-------------------------------------------------------------------------
ltab_dirty | bad dirty in lprops | fsck success, fs content is
| table. | not changed.
-------------------------------------------------------------------------
ltab_free | bad free in lprops | fsck success, fs content is
| table. | not changed.
-------------------------------------------------------------------------
index_size | bad index size in | fsck success, fs content is
| master nodes. | not changed.
-------------------------------------------------------------------------
tnc_lv0_key | bad key in lv0 | fsck success, fs content is
| znode. | not changed.
-------------------------------------------------------------------------
tnc_lv0_len | bad len in lv0 | fsck success, fs content is
| znode. | not changed.
-------------------------------------------------------------------------
tnc_lv0_pos | bad pos in lv0 | fsck success, fs content is
| znode. | not changed.
-------------------------------------------------------------------------
tnc_noleaf_key | bad key in non-leaf | fsck success, fs content is
| znode. | not changed.
-------------------------------------------------------------------------
tnc_noleaf_len | bad len in non-leaf | fsck success, fs content is
| znode. | not changed.
-------------------------------------------------------------------------
tnc_noleaf_pos | bad pos in non-leaf | fsck success, fs content is
| znode. | not changed.
-------------------------------------------------------------------------
corrupted_data_leb | corrupted data leb. | fsck success, partial data of
| | file is lost.
-------------------------------------------------------------------------
corrupted_idx_leb | corrupted index leb.| fsck success, fs content is
| | not changed.
-------------------------------------------------------------------------
inode_data | bad data node. | fsck success, file content
| | is changed, other files are
| | not changed.
-------------------------------------------------------------------------
inode_mode | bad inode mode for | fsck success, file is
| file. | dropped, other files are not
| | changed.
-------------------------------------------------------------------------
inode_nlink | wrong nlink for | fsck success, nlink is
| file. | corrected, fs content is not
| | changed.
-------------------------------------------------------------------------
inode_size | wrong inode size | fsck success, inode size is
| for file. | corrected, fs content is not
| | changed.
-------------------------------------------------------------------------
inode_xcnt | wrong inode | fsck success, xattr_cnt is
| xattr_cnt for file. | corrected, fs content is not
| | changed.
-------------------------------------------------------------------------
soft_link_inode_mode| bad inode mode for | fsck success, soft link
| solf link file. | file is dropped, other files
| | are not changed.
-------------------------------------------------------------------------
soft_link_data_len | bad inode data_len | fsck success, soft link
| for solt link file. | file is dropped, other files
| | are not changed.
-------------------------------------------------------------------------
dentry_key | bad dentry key for | fsck success, dentry is
| file. | removed, other files are
| | not changed.
-------------------------------------------------------------------------
dentry_nlen | inconsistent nlen | fsck success, dentry is
| and name in dentry | removed, other files are
| for file. | not changed.
-------------------------------------------------------------------------
dentry_type | inconsistent type | fsck success, dentry is
| between dentry and | removed, other files are
| inode for file. | not changed.
-------------------------------------------------------------------------
xinode_flags | lost UBIFS_XATTR_FL | fsck success, xattr is
| in xattr inode | removed, other files are
| flags for file. | not changed.
-------------------------------------------------------------------------
xinode_key | bad xattr inode key | fsck success, xattr is
| for file. | removed, other files are
| | not changed.
-------------------------------------------------------------------------
xinode_mode | bad xattr inode | fsck success, xattr is
| mode for file. | removed, other files are
| | not changed.
-------------------------------------------------------------------------
xentry_key | bad xattr entry key | fsck success, xattr is
| for file. | removed, other files are
| | not changed.
-------------------------------------------------------------------------
xentry_nlen | inconsistent nlen | fsck success, xattr is
| and name in xattr | removed, other files are
| entry for file. | not changed.
-------------------------------------------------------------------------
xentry_type | inconsistent type | fsck success, xattr is
| between xattr entry | removed, other files are
| and xattr inode for | not changed.
| file. |
-------------------------------------------------------------------------
xent_host | the xattr's host | fsck success, file, hard
| is a xattr too, the | link and soft link are
| flag of corrupt_file| dropped, other files are
| inode is modified. | not changed.
-------------------------------------------------------------------------
dir_many_dentry | dir has too many | fsck success, hard link is
| dentries, the dentry| dropped, other files are not
| of hard link is | changed.
| modified. |
-------------------------------------------------------------------------
dir_lost | bad dentry for dir. | fsck success, the 'file' is
| | recovered under lost+found,
| | left files under dir are
| | removed, other files are not
| | changed.
-------------------------------------------------------------------------
dir_lost_duplicated | bad inode for dir, | fsck success, the 'file' is
| there is a file | recovered with INO_<inum>_1
| under lost+found, | under lost+found, left files
| which named with the| under dir are removed, other
| inum of the 'file'. | files are not changed.
-------------------------------------------------------------------------
dir_lost_not_recover| bad inode for dir, | fsck success, all files
| lost+found is a | under dir are removed,
| regular file and | other files are not changed.
| exists under root |
| dir. |
-------------------------------------------------------------------------
root_dir | bad '/'. | fsck success, create new
| | root dir('/'). All regular
| | files are reocovered under
| | lost+found, other files are
| | removed.
-------------------------------------------------------------------------
empty_tnc | all files have bad | fsck success, fs content
| inode. | becomes empty.
=========================================================================
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