From: ranjith kannikara Subject: Re: Help to edit inode content Date: Wed, 13 May 2009 09:53:04 +0530 Message-ID: <20aa8c370905122123l23c02994q7fc41bd8b529342e@mail.gmail.com> References: <20aa8c370905120847j4b19175akbdcafc0db2004567@mail.gmail.com> <3e8340490905120856w62c6c5cexa247937bf7e84002@mail.gmail.com> <20aa8c370905120902o71ab9adflb8619e2a9ae343d0@mail.gmail.com> <20090512200310.GP3209@webber.adilger.int> <20aa8c370905122111x6bc80d4ave0c857fafd8d9e0a@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: Andreas Dilger , Bryan Donlan , linux-kernel@vger.kernel.org, linux-ext4@vger.kernel.org To: Manish Katiyar Return-path: Received: from mail-gx0-f166.google.com ([209.85.217.166]:53222 "EHLO mail-gx0-f166.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750890AbZEMEXH convert rfc822-to-8bit (ORCPT ); Wed, 13 May 2009 00:23:07 -0400 In-Reply-To: Sender: linux-ext4-owner@vger.kernel.org List-ID: On Wed, May 13, 2009 at 9:44 AM, Manish Katiyar wr= ote: > On Wed, May 13, 2009 at 9:41 AM, ranjith kannikara > wrote: >> On Wed, May 13, 2009 at 1:33 AM, Andreas Dilger wr= ote: >>> On May 12, 2009 =A021:32 +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 co= ntent? >>>> >> ie the recovery will be robust if we could edit the inode conte= nts 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 tho= se >>>> >> contents if the code is allowed to have the kernel mode permiss= ions..? >>>> >>>> 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 poss= ible >>>> 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 structu= re >>> of the ext3 inode? Generally that is NOT allowed because it will of >>> course break all existing filesystems if not done with extreme care= =2E >>> >>> 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 conten= t >> 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. > > Sorry , but it is still not clear to me whether you are trying to > change the on-disk structure of the inode or just change the ondisk > *contents* of some deleted inode to recover it. =A0Can you give an > example of what you are trying to do ? > > Thanks - > Manish > Ok, I will I want to edit the contects of some deleted inode to recover the file. = ie I have a file 'foo' with inode 123. and the inode have the direct and indirect data pointers in it. Now i deleted the file and is trying to recover it. I somehow could get what was the content,which is the pointers in the i= node. Now I would like to edit the inode 123 so that it will contain the above pointers and will be the same deleted file itself. I hope now its clear and you can help me. Regards Ranju. > > >> >> Regards >> ranju. >> >> -- >> http://www.ranjithkannikara.blogspot.com/ >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-ext4= " in >> the body of a message to majordomo@vger.kernel.org >> More majordomo info at =A0http://vger.kernel.org/majordomo-info.html >> > > > > -- > Thanks - > Manish > --=20 http://www.ranjithkannikara.blogspot.com/ -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html