linux-ext4 - Re: [PATCH 2/3] mke2fs: print extra information about existing ext2/3/4 file systems

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]

Date:	Mon, 5 May 2014 16:38:37 +0200 (CEST)
From:	Lukáš Czerner <lczerner@...hat.com>
To:	"Theodore Ts'o" <tytso@....edu>
cc:	Ext4 Developers List <linux-ext4@...r.kernel.org>, kzak@...hat.com,
	linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH 2/3] mke2fs: print extra information about existing
 ext2/3/4 file systems

On Mon, 5 May 2014, Theodore Ts'o wrote:

> Date: Mon, 5 May 2014 10:28:08 -0400
> From: Theodore Ts'o <tytso@....edu>
> To: Lukáš Czerner <lczerner@...hat.com>
> Cc: Ext4 Developers List <linux-ext4@...r.kernel.org>
> Subject: Re: [PATCH 2/3] mke2fs: print extra information about existing
>     ext2/3/4 file systems
> 
> On Mon, May 05, 2014 at 10:04:01AM -0400, Theodore Ts'o wrote:
> > The basic idea behinid these patches is that we now get a bit more
> > context with the warning message for ext2/3/4 file systems:
> > 
> > % ./misc/mke2fs -t ext4 /dev/heap/media
> > mke2fs 1.42.9 (4-Feb-2014)
> > /dev/heap/media contains a ext4 file system labelled 'media'
> > 		  last mounted on /media on Mon May  5 08:59:53 2014
> > Proceed anyway? (y,n) 
> 
> And actually, the place where this context is critically important is
> in this case (where let's say, the user typo's sdc3 when they meant to
> type sdd3):
> 
> % ./misc/mke2fs -t ext4 /dev/sdc3
> mke2fs 1.42.9 (4-Feb-2014)
> /dev/sdc3 contains a ext4 file system
> 	last mounted on /SOX-backups on Mon May  5 08:59:53 2014
> Proceed anyway? (y,n) 
> 
> ... where this becomes a last-ditch saving through against the
> accidental wiping of the enterprise's Sarbanes-Oxley records.  :-)
> 
> 						- Ted

Yep, it's really useful. I just was not sure what is this all about since
there was not description and I was missing context from the other patches.

But this makes me think that it would be very useful if blkid could
gather this information for other file system if possible :). This
might be very useful if we can get some overlap with other file
system with the information provided in superblock.

Karel, what do you think ?

-Lukas