linux-ext4 - Re: [Patch] Improve e2fsck heuristics for detecting corrupted inodes

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Date:	Thu, 07 Jun 2007 15:22:55 +0530
From:	Girish Shilamkar <girish@...syssoft.com>
To:	Ext4 Mailing List <linux-ext4@...r.kernel.org>
Cc:	Andreas Dilger <adilger@...sterfs.com>
Subject: Re: [Patch] Improve e2fsck heuristics for detecting corrupted
	inodes

Oops....

On Thu, 2007-06-07 at 15:12 +0530, Girish Shilamkar wrote:
> Hi,
>      The present e2fsck code checks the inode, per field basis. It
> doesn't take into consideration to total sanity of the inode. This may
> cause e2fsck turning a garbage inode into a sane inode.
> 	The following patch adds a heuristics to detect the degree of badness
> of an inode. icount mechanism is used to keep track of the badness of
> every inode. The badness is increased as various fields in inode are
> found to be corrupt. Badness above a certain threshold value results in
> deletion of the inode. The default threshold value is 7, it can be
> specified to e2fsck using "-E inode_badness_threshold=<value>"
> 
> Any suggestions/comments are welcome.
> 
> Thanks & Regards,
> Girish
> 
> 
> Signed-off-by: Andreas Dilger <adilger@...sterfs.com>
> Signed-off-by: Girish Shilamkar <girish@...sterfs.com>
> 
> diffstat patches/e2fsprogs-badness-counter.patch 
>  e2fsck/e2fsck.8.in                      |    7 +
>  e2fsck/e2fsck.c                         |    4 
>  e2fsck/e2fsck.h                         |   19 +++
>  e2fsck/pass1.c                          |  155
> ++++++++++++++++++++++++--------
>  e2fsck/pass1b.c                         |    4 
>  e2fsck/pass2.c                          |   83 +++++++++++++----
>  e2fsck/pass4.c                          |    1 
>  e2fsck/problem.c                        |    5 +
>  e2fsck/problem.h                        |    3 
>  e2fsck/unix.c                           |   16 ++-
>  lib/ext2fs/icount.c                     |   18 +++
>  tests/f_bad_disconnected_inode/expect.1 |   14 --
>  tests/f_bad_disconnected_inode/expect.2 |    2 
>  13 files changed, 253 insertions(+), 78 deletions(-)
> 
> 
> 
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View attachment "e2fsprogs-badness-counter.patch" of type "text/x-patch" (28906 bytes)