Re: [RFC] automount based devfs replacement

From: david parsons (orc@pell.portland.or.us)
Date: Mon Apr 17 2000 - 13:36:12 EST


In article <linux.kernel.20000417124417.A813@sb.t-online.de>,
Christoph Hellwig <chhellwig@gmx.net> wrote:
>
>--xHFwDpU9dbj6ez1V
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>Hi,
>I've thought a bit about some ideas to replaced devfs with a combination
>of automount and many small virtual filesystems. The idea is the following:

    I'd say ick, because it seems like it's replacing a somewhat flawed
    (odd and very non-traditional-Unix naming scheme, issues with
    multiple mounts) kernel scheme with a somewhat more fragile and
    complicated automount arrangement.

    I'd think it would be somewhat better to patch devfs so that it can
    only be mounted once (as a quick fix to the technical issues that
    are now being mentioned; if there are other technical issues with
    the current devfs they'll become more visible when Al Viro isn't
    fretting quite so much over the multiple-mounts thing) and do a
    purely user-mode hack to devfsd to fake multiple mounts.

> - all device that must not be on this virtual file systems (/dev/console,
> (dev/devfsd, a to be implemeted /dev/root, ...) are normal nodes in /dev
> (once we get union-mounts ...).

    This, on the other hand, is a non-ick, since a working union-mount
    would be a Good Thing, and perhaps a larger body of code that
    requires it would shake it out. (Though if Al Viro is the only
    person working on it, me might not appreciate the extra stress.
    Hopefully RH is keeping his office well stocked with devfs voodoo
    dolls)

                  ____
    david parsons \bi/ automount. Shudder.
                   \/

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