nfs versus reiser?

[hashi@pooq.com]

Can a reiserfs not be nfs-remote-mounted?
Or am I doing something else wrong?

I have a reiser filesystem mounted on a machine called topoi.
From a machine called lovesong I wish to nfs-mount this remote file system.
But all I get is

[root@lovesong hendrik]# mount /reiseroffsite/
mount: topoi:/reiseroffsite failed, reason given by server: Permission denied
[root@lovesong hendrik]#

Another filesystem, which happens to be an ext2 filesystem, works just fine.
Permissions on the various directories are identical between the two file systems. Even the /etc/exports lines are identical (except for the names of the file systems, of course.

Here are the relevant lines from /etc/exports on topoi:

/home2 172.25.1.2(rw,no_root_squash,map_identity) 172.25.1.3(rw,no_root_squash,map_identity) 172.25.1.4(rw,no_root_squash,map_identity)
/reiseroffsite 172.25.1.2(rw,no_root_squash,map_identity) 172.25.1.3(rw,no_root_squash,map_identity) 172.25.1.4(rw,no_root_squash,map_identity)

And the relevane lines from /etc/fstab on lovesong:

172.25.1.1:/home2 /home2 nfs defaults,noauto,user,exec,rw 0 0
topoi:/reiseroffsite /reiseroffsite nfs defaults,noauto,users,exec,rw 0 0


Can a reiserfs not be nfs-remote-mounted?

-- hendrik


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[Mark Ferlatte]

[email]hashi@pooq.com[/email] said on Sun, Aug 03, 2003 at 02:54:33PM -0400:

>
> Can a reiserfs not be nfs-remote-mounted?

Yes.

> Or am I doing something else wrong?

Probably.

> [root@lovesong hendrik]# mount /reiseroffsite/
> mount: topoi:/reiseroffsite failed, reason given by server: Permission denied
> [root@lovesong hendrik]#

Have you read your logs? Try doing the mount, and then check the logs on both
the server and the client.

M

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[hashi@pooq.com]

On Sun, Aug 03, 2003 at 02:08:10PM -0700, Mark Ferlatte wrote:

> [email]hashi@pooq.com[/email] said on Sun, Aug 03, 2003 at 02:54:33PM -0400:

> >
> > Can a reiserfs not be nfs-remote-mounted?

>
> Yes.

Serves me right for asking a negative question. I presume this meand Yes, a reiserfs can be nfs-remote-mounted.

>

> > Or am I doing something else wrong?

>
> Probably.
>

> > [root@lovesong hendrik]# mount /reiseroffsite/
> > mount: topoi:/reiseroffsite failed, reason given by server: Permission denied
> > [root@lovesong hendrik]#

>
> Have you read your logs? Try doing the mount, and then check the logs on both
> the server and the client.
>
> M

When I try to mount topoi:/reiseroffsite onto /reiseroffsite on lovesong, I get

ug 3 17:04:31 topoi -- MARK --
Aug 3 17:24:27 topoi rpc.mountd: authenticated mount request from lovesong:89\
9 for /reiseroffsite (/reiseroffsite)
Aug 3 17:24:27 topoi rpc.mountd: getfh failed: Operation not permitted

Nothins shows up in the log on lovesong.

But if (on topoi) I first umount /reiseroffsite, so that topoi:/reiseroffset
is an ordinary directory instead of a mounted reiser file system, and
then I mount topoi:/reiseroffsite on /reiseroffsite on lovesong, it
mounts with the following message. But of course I am not mounting
the remote reiser file system if I do this.

Aug 3 17:26:02 topoi rpc.mountd: authenticated mount request from lovesong:93\
5 for /reiseroffsite (/reiseroffsite)

No complaint about getfh failing. What is gatfh, anyway?

This suggests strongly that it is topoi's mounted reiser file system that
blocks things, since when it is not mounted on topoi, there is no problem.

And here is are the relevant lines from /etc/fstab. /home2 is an ext2
file system that can be properly nfs-exported. /reiseroffsite, however,
cannot be.

/dev/hdb11 /home2 ext2 defaults 1 2
/dev/hdc1 /reiseroffsite reiserfs noauto,user 0 0

Is it perhaps that user-mountable volumes cannot be nfs-ported?
It doesn't help if I mount them as root? I cold have sworn
I had done that regularly a few months age with another
(ext2) partition.

-- hendrik



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[hashi@pooq.com]

On Sun, Aug 03, 2003 at 05:07:22PM -0700, Mark Ferlatte wrote:

> [email]hashi@pooq.com[/email] said on Sun, Aug 03, 2003 at 05:53:21PM -0400:

> > Serves me right for asking a negative question. I presume this meand Yes, a
> > reiserfs can be nfs-remote-mounted.

>
> :) I use reiserfs via NFS faily often.

And I have got it working too, butnot quite to my satisfaction. I will
have to experiment a little more. But I it does not appear to be a
reiserfs problem.

The following fstab entry works on topoi
/dev/hdc1 /reiseroffsite reiserfs defaults 1 2

The following one does not:
/dev/hdc1 /reiseroffsite reiserfs noauto,user 0 0

So it has to do with the context of the mount. Anyway, having it
automatically mounted at boot is not acceptable in the long term
because it is a dismountable volume, and, in fact, most of the time
it sits on a shelf serving as a backup.

>

> > When I try to mount topoi:/reiseroffsite onto /reiseroffsite on lovesong, I get
> >
> > ug 3 17:04:31 topoi -- MARK --
> > Aug 3 17:24:27 topoi rpc.mountd: authenticated mount request from lovesong:89\
> > 9 for /reiseroffsite (/reiseroffsite)
> > Aug 3 17:24:27 topoi rpc.mountd: getfh failed: Operation not permitted
> >
> > Nothins shows up in the log on lovesong.

>
> Interesting. What kernel are you using on topoi? I think there are issues
> with reiserfs and NFS in 2.2.

debian on topoi,

hendrik@topoi:~$ uname -r
2.4.16-586
hendrik@topoi:~$

Mandrake 9.0 on lovesong

[hendrik@lovesong hendrik]$ uname -r
2.4.18-6mdk
[hendrik@lovesong hendrik]$

>

> > Is it perhaps that user-mountable volumes cannot be nfs-ported?

>
> Hrm... not sure about that.

Experiment suggests it is something *like* that. Is there some way
of getting it mounted at boot if it is present but ignored if it is
not? The drive is dismountable, but not hot-pluggable. I have to
turn the machine off whenever I insert or remove it. Last time I
had a nonexistent partition mounted at boot it went into some
emergency mode and refused to finish booting until I fixed
to problem.

But even so, there ought to be a way to export even hot-ploggable drives.

-- hendrik


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[hashi@pooq.com]

On Tue, Aug 05, 2003 at 10:34:38AM -0400, [email]hashi@pooq.com[/email] wrote:

> On Sun, Aug 03, 2003 at 05:07:22PM -0700, Mark Ferlatte wrote:

> > [email]hashi@pooq.com[/email] said on Sun, Aug 03, 2003 at 05:53:21PM -0400:

> > > Serves me right for asking a negative question. I presume this meand Yes, a
> > > reiserfs can be nfs-remote-mounted.

> >
> > :) I use reiserfs via NFS faily often.

>
> And I have got it working too, butnot quite to my satisfaction. I will
> have to experiment a little more. But I it does not appear to be a
> reiserfs problem.
>
> The following fstab entry works on topoi
> /dev/hdc1 /reiseroffsite reiserfs defaults 1 2
>
> The following one does not:
> /dev/hdc1 /reiseroffsite reiserfs noauto,user 0 0
>
> So it has to do with the context of the mount. Anyway, having it
> automatically mounted at boot is not acceptable in the long term
> because it is a dismountable volume, and, in fact, most of the time
> it sits on a shelf serving as a backup.

I will have to try noauto without user.

-- hendrik


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[Mark Ferlatte]

[email]hashi@pooq.com[/email] said on Tue, Aug 05, 2003 at 10:34:38AM -0400:

> So it has to do with the context of the mount. Anyway, having it
> automatically mounted at boot is not acceptable in the long term
> because it is a dismountable volume, and, in fact, most of the time
> it sits on a shelf serving as a backup.

Maybe you could try using autofs?

M

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