Re: NFS-mounted, read-only /dev unusable in 2.6

[Frank Steiner <fsteiner-mail@bio.ifi.lmu.de>]

Neil Brown wrote:

>>But I just tried to reproduce this on 2.6.7-rc2 (it's what my
>>workstation happens to be running) and I can't. I can mount an
>>nfs-exported /dev from both 2.4 and 2.6 servers read-only and
>>I can open devices on that read-only mount just fine.
> 
> 
> Yes, it was a bug in the NFS server in 2.6 that was fixed fairly
> recently.

Hi Neil,

it still occurs in 2.6.8rc3 in some way:

Server and client both running 2.6.8rc3. The client mounts the /dev
directory from the server *read-only always*:

- when the server exports its /dev ro, the client cannot echo sth.
   to the mounted dev/console
- when the server exports its /dev rw, the client can echo to dev/console,
   although it has mounted it ro.

A client running kernel 2.4 can echo to dev/console in both cases,
even with the server exporting /dev ro.

So I'm not sure if this is a client or server issue, but I guess that
Trond is reading NFS stuff here, too...


cu,
Frank

-- 
Dipl.-Inform. Frank Steiner   Web:  http://www.bio.ifi.lmu.de/~steiner/
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