linux-kernel - Re: Asking for inclusion of nilfs2 in the mainline kernel

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] [day] [month] [year] [list]

Message-Id: <20090313.190418.110778375.ryusuke@osrg.net>
Date:	Fri, 13 Mar 2009 19:04:18 +0900 (JST)
From:	Ryusuke Konishi <ryusuke@...g.net>
To:	raa.lkml@...il.com
Cc:	konishi.ryusuke@....ntt.co.jp, akpm@...ux-foundation.org,
	hch@....de, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: Asking for inclusion of nilfs2 in the mainline kernel

Hi!
On Fri, 13 Mar 2009 09:05:53 +0100, Alex Riesen wrote:
> 2009/3/10 Ryusuke Konishi <konishi.ryusuke@....ntt.co.jp>:
> >
> > # mount -t nilfs2 -r -o cp=33339 /dev/sdb1 /snap
> > (mount the snapshot, then it will become accessible on the mount=
 point)
>
> Is it possible to mount a snapshot rw to make it a branch?

No, the writable snapshot is not supported.
( So, a readonly option appears in the example. )

Maybe the current design is unfit for efficient branching because
nilfs identifies checkpoints with linear numbers and manages lifetime
of each on-disk block with a range of the numbers.

We might be able to add a feature like replacing the latest filesystem
state with a past snapshot, but it's not yet determined.

Cheers,
Ryusuke
--
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/