From: Christian Kellermann <Christian.Kellermann@nefkom.net>
To: Fans of the OS Plan 9 from Bell Labs <9fans@cse.psu.edu>
Subject: Re: [9fans] Glendix?
Date: Wed, 14 Nov 2007 13:40:11 +0100 [thread overview]
Message-ID: <20071114124011.GC4327@hermes.my.domain> (raw)
In-Reply-To: <225fa8e60711140417g20915568r70a27f2dab69a247@mail.gmail.com>
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* R <0xef967c36@gmail.com> [071114 13:19]:
> On Nov 14, 2007 1:44 PM, Iruata Souza <iru.muzgo@gmail.com> wrote:
> > On 11/14/07, R <0xef967c36@gmail.com> wrote:
> > > OpenBSD already has filesystems in userland. Look for mount_xfs
> > > (nothing to do with the SGI/linux thing). It is used by their afs client
> > > implementation.
> > >
> >
> > if you talking about /sbin/mount_xfs, it's just a mounter for the xfs
> > filesystem. if you take a look at /sys/xfs you'll see what have to be
> > done in the kernel.
>
> No, you're wrong !
>
> You can write a new filesystem as a userland daemon - and have
> it communicate with the kernel via a /dev/xfs* device.
> There's no need for extra code in the kernel.
>
> In fact, that's exactly how afsd (the Andrew Filesystem client, part
> of the standard distribution) is working.
You are both right. The AFS daemon runs in userspace. There has to be
a kernel interface to get it into the systems namespace facility
(here it is called VFS). For AFS this interface is very application specific
(/dev/xfs) but Iru's approach would allow to write drivers in userspace and
communicate with the kernel through an application independent interface.
This is what 9p is all about...
--
You may use my gpg key for replies:
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next prev parent reply other threads:[~2007-11-14 12:40 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-11-13 9:28 Anant Narayanan
2007-11-13 10:05 ` Gorka Guardiola
2007-11-13 10:14 ` Uriel
2007-11-13 10:33 ` Gorka Guardiola
2007-11-13 14:25 ` David Leimbach
2007-11-14 0:51 ` Alexander Sychev
2007-11-13 21:37 ` Joel C. Salomon
2007-11-13 10:17 ` Charles Forsyth
2007-11-13 10:39 ` roger peppe
2007-11-13 10:47 ` Anant Narayanan
2007-11-13 12:18 ` Uriel
2007-11-13 13:00 ` erik quanstrom
2007-11-13 13:31 ` Uriel
2007-11-13 13:47 ` roger peppe
2007-11-13 14:10 ` sqweek
2007-11-13 13:54 ` Charles Forsyth
2007-11-13 15:20 ` Anant Narayanan
2007-11-13 18:23 ` Bakul Shah
2007-11-13 14:26 ` erik quanstrom
2007-11-13 16:49 ` Uriel
2007-11-13 17:19 ` erik quanstrom
2007-11-13 17:24 ` Iruata Souza
2007-11-13 22:01 ` David Leimbach
2007-11-13 15:16 ` Anant Narayanan
2007-11-13 14:29 ` Anant Narayanan
2007-11-13 17:21 ` erik quanstrom
2007-11-13 21:41 ` Joel C. Salomon
2007-11-13 13:30 ` John Stalker
2007-11-13 15:35 ` Harri Haataja
2007-11-13 16:22 ` John Stalker
2007-11-13 16:43 ` Aki Nyrhinen
2007-11-13 16:39 ` Uriel
2007-11-13 16:46 ` Iruata Souza
2007-11-13 18:02 ` Charles Forsyth
2007-11-13 18:12 ` Iruata Souza
2007-11-13 22:04 ` David Leimbach
2007-11-13 22:16 ` David Leimbach
2007-11-13 23:19 ` Iruata Souza
2007-11-14 2:23 ` R
2007-11-14 11:44 ` Iruata Souza
2007-11-14 12:17 ` R
2007-11-14 12:40 ` Christian Kellermann [this message]
2007-11-14 13:01 ` R
2007-11-14 13:08 ` Christian Kellermann
2007-11-13 17:48 ` John Stalker
2007-11-13 16:26 ` Russ Cox
2007-11-13 16:42 ` Charles Forsyth
2007-11-13 17:44 ` Latchesar Ionkov
2007-11-14 5:44 ` ron minnich
2007-11-16 8:42 ` [9fans] Nine4Linux [WAS: Glendix?] Enrico Weigelt
2007-11-16 10:20 ` erik quanstrom
[not found] ` <1b69251dfdcb6b8022ff78767f07ce86@quanstro.net>
2007-11-22 18:01 ` Enrico Weigelt
2007-11-22 22:00 ` Paweł Lasek
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