From: Andreas Dilger Subject: Re: Help to edit inode content Date: Tue, 12 May 2009 14:03:10 -0600 Message-ID: <20090512200310.GP3209@webber.adilger.int> References: <20aa8c370905120847j4b19175akbdcafc0db2004567@mail.gmail.com> <3e8340490905120856w62c6c5cexa247937bf7e84002@mail.gmail.com> <20aa8c370905120902o71ab9adflb8619e2a9ae343d0@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; CHARSET=US-ASCII Content-Transfer-Encoding: 7BIT Cc: Bryan Donlan , linux-kernel@vger.kernel.org, linux-ext4@vger.kernel.org To: ranjith kannikara Return-path: Received: from sca-es-mail-1.Sun.COM ([192.18.43.132]:56526 "EHLO sca-es-mail-1.sun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751498AbZELUDe (ORCPT ); Tue, 12 May 2009 16:03:34 -0400 Content-disposition: inline In-reply-to: <20aa8c370905120902o71ab9adflb8619e2a9ae343d0@mail.gmail.com> Sender: linux-ext4-owner@vger.kernel.org List-ID: On May 12, 2009 21:32 +0530, ranjith kannikara wrote: > On Tue, May 12, 2009 at 9:26 PM, Bryan Donlan wrote: > > On Tue, May 12, 2009 at 11:47 AM, ranjith kannikara > > 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.