linux-kernel - Re: Help to edit inode content

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Message-id: <20090512200310.GP3209@webber.adilger.int>
Date:	Tue, 12 May 2009 14:03:10 -0600
From:	Andreas Dilger <adilger@....com>
To:	ranjith kannikara <ranjithkannikara@...il.com>
Cc:	Bryan Donlan <bdonlan@...il.com>, linux-kernel@...r.kernel.org,
	linux-ext4@...r.kernel.org
Subject: Re: Help to edit inode content

On May 12, 2009  21:32 +0530, ranjith kannikara wrote:
> On Tue, May 12, 2009 at 9:26 PM, Bryan Donlan <bdonlan@...il.com> wrote:
> > On Tue, May 12, 2009 at 11:47 AM, ranjith kannikara
> > <ranjithkannikara@...il.com> wrote:
> >> I am a computer science engineering student. We have started a project
> >> to make an application to recover deleted files from an ext3
> >> filesystem. For that we have a doubt . Can we edit the inode content?
> >> ie the recovery will be robust if we could edit the inode contents and
> >> give the pointer address manually or through a code. The inode is
> >> being created in the kernel mode and is it possible to edit those
> >> contents if the code is allowed to have the kernel mode permissions..?
>
> But we would like to know whether it is possible to edit the inode
> because it will make the recovery easy and robust. ie he know the
> details of the inode of the file which had been deleted is it possible
> to edit the content of that inode with the pointers of the deleted
> file.?

Are you asking whether it is possible to modify the on-disk structure
of the ext3 inode?  Generally that is NOT allowed because it will of
course break all existing filesystems if not done with extreme care.

Cheers, Andreas
--
Andreas Dilger
Sr. Staff Engineer, Lustre Group
Sun Microsystems of Canada, Inc.

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