linux-ext4 - [PATCH v3 00/11] e4defrag: fragmentation score rework and cleanups

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Date:	Mon, 14 Nov 2011 15:23:44 +0900
From:	Kazuya Mio <k-mio@...jp.nec.com>
To:	ext4 <linux-ext4@...r.kernel.org>
CC:	Theodore Tso <tytso@....edu>, Andreas Dilger <adilger@...ger.ca>
Subject: [PATCH v3 00/11] e4defrag: fragmentation score rework and cleanups

Hi,

This patch set adds the new function e2p_get_fragscore() to libe2p, that
calculates the fragmentation score. Fragmentation score shows how badly
fragmented the file might be. e4defrag uses it to determine smarter whether to
call EXT4_IOC_MOVE_EXT ioctl.

In addition, the 6th to the last is bugfix or cleanup patch.

v2 -> v3

- Don't treat integer variables as boolean in some conditions for good
  readability
- Output the progress of the defrag like mke2fs to reduce log file size
- Revert to checking st_blocks to skip defrag safety if file has no blocks

Thanks for the above helpful comments, Dilger.

v1 -> v2
- Fix the method of calculating fragmentation score to show the number of
  extents per specified blocks
- Remove the check of filesystem type to calculate the fragmentation score
  for the file in non-ext4 filesystem
- Drop the patch for filefrag
- Fix free blocks check to use reserved blocks by users specified by
  resuid/resgid mount option
- Add -F option to defrag a file if the fragment can get better even if
  the fragmentation score of donor file is bigger than 1

This patch set is for e2fsprogs git tree. (commit:6b967cd6f1)

Kazuya Mio (11):
  libe2p: Add new function e2p_get_fragscore()
  e4defrag: Remove -c option which checks the file fragmentation
  e4defrag: Remove old fragmentation score calculation code
  e4defrag: Use e2p_get_fragscore() for decision of whether to defrag
  e4defrag: Add -F option for force defrag
  e4defrag: Allow user who has read+write permission to defrag
  e4defrag: Allow user who can use reserved blocks to defrag
  e4defrag: Use libext2fs definitions
  e4defrag: Fix error messages more clearly
  e4defrag: Fix the method of progress output
  e4defrag: Remove unnecessary code

 lib/e2p/Makefile.in      |    6 
 lib/e2p/e2p.h            |    3 
 lib/e2p/fragment_score.c |  133 ++++++
 misc/Makefile.in         |    4 
 misc/e4defrag.8.in       |   33 -
 misc/e4defrag.c          |  950 +++++++----------------------------------------
 6 files changed, 290 insertions(+), 839 deletions(-)

Regards,
Kazuya Mio
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