linux-ext4 - Re: Committing changes to an ext3

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <B25FFA22-5EBF-472C-B030-22617E4539DE@dilger.ca>
Date:	Tue, 19 Oct 2010 15:56:50 -0600
From:	Andreas Dilger <adilger@...ger.ca>
To:	Felipe Franciosi <felipe@...adoxo.org>
Cc:	linux-ext4@...r.kernel.org
Subject: Re: Committing changes to an ext3_inode structure

On 2010-10-19, at 09:23, Felipe Franciosi wrote:
> I am experimenting on a 2.6.20.3-ubuntu1 kernel to prototype and evaluate different methods for migrating datablocks for a given inode on the fly.
> 
> I have created an ioctl call that implements some verifications and invokes a function I wrote in balloc.c for such migration.

Are you aware that there already is the ability to do on-the-fly migration of files in ext4?  This was developed quite some time ago and is in ext4 in newer kernels (not sure of the exact version, maybe 2.6.32 or so).

I would strongly recommend that you investigate that code, since it could definitely use some good testing/inspection/enhancement (as needed).  It is in fs/ext4/migrate.c, though I'm not sure where the user-space tools are located (maybe e2fsprogs?).

Cheers, Andreas

--
To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html