linux-ext4 - [PATCH 00/32] e2fsprogs: make e2fsprogs support inline data

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Date:	Mon, 16 Apr 2012 19:39:35 +0800
From:	Zheng Liu <gnehzuil.liu@...il.com>
To:	linux-ext4@...r.kernel.org
Cc:	Zheng Liu <wenqing.lz@...bao.com>
Subject: [PATCH 00/32] e2fsprogs: make e2fsprogs support inline data

Hi list,

Here is v2 for making e2fsprogs support inline data.  Now debugfs supports
inline data in read-write mode.  Meanwhile e2fsck has been improved to support
inline data feature.

v1->v2:
* [mke2fs] automatically set EXT_ATTR feature when INLINE_DATA is set
* [debugfs] supports read-write mode

In mke2fs, EXT4_FEATURE_INCOMPAT_INLINE_DATA is set to 0x2000 to consist with
kernel.  When making a new ext4 file system with INLINE_DATA feature, mke2fs
will check whether EXT_ATTR is set or not.  If it is not set, mke2fs will mark
it automatically because INLINE_DATA depends on it.

In debugfs, it can support inline data in read-write mode.  Now there is two
problems that need to be solved.  No matter whether the size of data is fit
into inline data or not, 'write' command writes the data into disk blocks
rather than inode itself.  'mkdir' command will expand dir to a new disk block
when inode->i_block has full because Tao found a performance regression when a
huge number of dirs are added and removed in EA space.  It causes that the code
in kernel might be changed.  So now 'mkdir' cmd doesn't add a new dir entry
in EA space.

TODO list:
* [mke2fs] initialize ROOT dir with inline data flag
* [mke2fs] initialize LOST+FOUND dir with inline data flag
* [debugfs] 'write' cmd writes the data into inode itself
* [debugfs] 'mkdir' cmd add dir entry into EA space

Regards,
Zheng

libext2fs: add EXT4_FEATURE_INCOMPAT_INLINE_DATA flag
mke2fs: make it support inline data feature
libext2fs: add inline_data feature
mke2fs: add inline_data feature in mke2fs's manpage
libext2fs: add ext2fs_find_entry_ext_attr function
libext2fs: add EXT4_INLINE_DATA_FL flag for inode
libext2fs: add data structures for inline data feature
libext2fs: add inline_data file
debugfs: make ncheck cmd support inline data
debugfs: make chroot and cd cmd support inline data
debugfs: make ls cmd support inline data
debugfs: make stat cmd support inline data
debufs: make blocks cmd support inline data
debugfs: make filefrag cmd support inline data
debugfs: make link cmd support inline data
debugfs: make unlink cmd support inline data
debugfs: make mkdir cmd support inline data
debugfs: make rmdir cmd support inline data
debugfs: make rm and kill_file cmd support inline data
debugfs: make pwd cmd support inline data
debugfs: make expand_dir cmd support inline data
debugfs: make lsdel cmd support inline data
debugfs: make undel cmd support inline data
debugfs: make dump and cat cmd support inline data
debugfs: make rdump cmd support inline data
debugfs: make dirsearch cmd support inline data
debugfs: make bma cmd support inline data
e2fsck: add three problem descriptions in pass1
e2fsck: check incorrect inline data flag
e2fsck: make pass1 support inline data
libext2fs: add read/write inline data functions
e2fsck: check inline data in pass2

 debugfs/debugfs.c          |   25 ++-
 debugfs/dump.c             |   38 +++-
 debugfs/filefrag.c         |   30 ++-
 debugfs/htree.c            |    6 +
 debugfs/ls.c               |    8 +-
 debugfs/lsdel.c            |   19 +-
 debugfs/ncheck.c           |    8 +-
 e2fsck/pass1.c             |   70 ++++-
 e2fsck/pass1b.c            |    5 +-
 e2fsck/pass2.c             |   50 +++-
 e2fsck/problem.c           |   15 +
 e2fsck/problem.h           |    9 +
 lib/e2p/feature.c          |    2 +
 lib/ext2fs/Makefile.in     |    5 +
 lib/ext2fs/Makefile.pq     |    1 +
 lib/ext2fs/bmap.c          |   16 +
 lib/ext2fs/dblist_dir.c    |    8 +-
 lib/ext2fs/dirblock.c      |   62 ++++
 lib/ext2fs/expanddir.c     |    8 +-
 lib/ext2fs/ext2_ext_attr.h |    4 +
 lib/ext2fs/ext2_fs.h       |    9 +
 lib/ext2fs/ext2fs.h        |   69 ++++-
 lib/ext2fs/ext_attr.c      |   26 ++
 lib/ext2fs/get_pathname.c  |    7 +-
 lib/ext2fs/inline_data.c   |  715 ++++++++++++++++++++++++++++++++++++++++++++
 lib/ext2fs/link.c          |    9 +-
 lib/ext2fs/lookup.c        |    6 +-
 lib/ext2fs/mkdir.c         |    4 +
 lib/ext2fs/unlink.c        |    9 +-
 misc/mke2fs.8.in           |    3 +
 misc/mke2fs.c              |   10 +-
 31 files changed, 1197 insertions(+), 59 deletions(-)
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