linux-kernel - Re: A Plumber’s Wish List for Linux

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 for Android: free password hash cracker in your pocket

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

Message-ID: <20111007113820.3b8424a8@lxorguk.ukuu.org.uk>
Date:	Fri, 7 Oct 2011 11:38:20 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Kay Sievers <kay.sievers@...y.org>
Cc:	linux-kernel@...r.kernel.org, lennart@...ttering.net,
	harald@...hat.com, david@...ar.dk, greg@...ah.com
Subject: Re: A Plumber’s Wish List for Linux

On Fri, 7 Oct 2011 12:28:46 +0200
Kay Sievers <kay.sievers@...y.org> wrote:

> On Fri, Oct 7, 2011 at 12:12, Alan Cox <alan@...rguk.ukuu.org.uk> wrote:
> >> * (ioctl based?) interface to query and modify the label of a mounted
> >> FAT volume:
> >
> > Seems sensible - or it could go in sysfs ?
> 
> That would mean to export superblocks in /sys, which isn't namespaced,
> and which might create issues by making information globally available
> which probably shouldn't?

Possibly, otherwise you really need an ioctl on the root inode of the fs
- which is doable, NCPfs makes heavy use of that.
> 
> >> A FAT labels is implemented as a hidden directory entry in the file
> >> system which need to be renamed when changing the file system label,
> >
> > That would be ugly - it works for FAT as you can create an imaginary name
> > which is not possible on the fs, but that isn't true for say ext4. Sysfs
> > sounds the logic way, it means adding chunks of code to various file
> > systems.
> 
> What do you mean would be ugly?

I have an ext4fs. It supports every possible file name allowed by POSIX
and SuS. What name are you going to use for your 'hidden directory' that
won't clash with a real file ?

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