linux-ext4 - Re: Help to edit inode content

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Message-ID: <20aa8c370905122111x6bc80d4ave0c857fafd8d9e0a@mail.gmail.com>
Date:	Wed, 13 May 2009 09:41:22 +0530
From:	ranjith kannikara <ranjithkannikara@...il.com>
To:	Andreas Dilger <adilger@....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 Wed, May 13, 2009 at 1:33 AM, Andreas Dilger <adilger@....com> wrote:
> 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.
>
>
Hi,
Actually I was asking the same. whether it is possible to edit the
inode content of a disk or the image of a disk. Did you mean that it
is not possible at all. Is there any method to edit the inode content
and use the edited inode for a file, If we can ensure high care.
because such a method will be the most robust one in the recovery of
deleted file.

Regards
ranju.

-- 
http://www.ranjithkannikara.blogspot.com/
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