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Date:	Wed, 17 Aug 2011 10:09:16 -0700
From:	"Darrick J. Wong" <>
To:	Andi Kleen <>
Cc:	"Theodore Ts'o" <>,
	Andreas Dilger <>,
	linux-fsdevel <>,
	linux-ext4 <>,
	linux-kernel <>,
	Sunil Mushran <>,
	Joel Becker <>,
	Mingming Cao <>,
	Amir Goldstein <>, Coly Li <>
Subject: Re: [RFC] ext4 metadata checksumming design

On Wed, Aug 17, 2011 at 03:57:19PM +0200, Andi Kleen wrote:
> On Tue, Aug 16, 2011 at 08:25:19PM -0700, Darrick J. Wong wrote:
> > Hi all,
> > 
> > I've created a page on the ext4 wiki outlining the patchset that I'm working on
> > to add metadata checksumming to ext4.  The page can be found at this address:
> >
> Can you summarize the differences to my earlier patchkit?

My new patchset intends to expand on your earlier inode/superblock patches by
adding checksums to nearly all metadata objects (directory blocks, htree,
extent tree, block/inode bitmaps, extended attributes).  It also adds code to
e2fsprogs to verify the checksums, and make the necessary adjustments to the
on-disk format to add space for checksums.

> -Andi
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