Exporting Nested Directories

Exporting Nested Directories

[Adam Thomas]

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I'm trying to export two directories on the same filesystem. The exports
file looks something like this:

/raid 192.168.1.0/23(rw,sync)
/raid/userdir 192.168.1.0/23(rw,sync)

When I try to do this I get a lot of unusual behavior (some clients will
mount, but others won't even though they are within the same IP range).

Are there any restriction with exporting a nested directory like this?

The host is running RHELv3, kernel 2.4.21 with the stock nfs package. The
clients are all recent version of CentOS or Redhat Linux with the most
recent nfs-utils packages.

Thanks,
-Adam

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Re: Exporting Nested Directories

[Jeff Layton]

On Wed, 27 Jun 2007 14:41:49 -0400
"Adam Thomas" <nfs@adamthomas.us> wrote:

> I'm trying to export two directories on the same filesystem. The exports
> file looks something like this:
> 
> /raid 192.168.1.0/23(rw,sync)
> /raid/userdir 192.168.1.0/23(rw,sync)
> 

That seems erm...a bit strange.

Any host that has access to /raid will have access to /raid/userdir
automatically. Why not just remove the second export here if they're
truly on the same filesystem? The options are exactly the same.

> When I try to do this I get a lot of unusual behavior (some clients will
> mount, but others won't even though they are within the same IP range).
> 

My first thought is that you may be running into some weirdness with
subtree checking here, though I'll confess that I've not looked closely
at that code in a long time.

> Are there any restriction with exporting a nested directory like this?
> 

There are some. Check out the subtree_check option in the exports
manpage, though for RHEL3 that should already be the default.

> The host is running RHELv3, kernel 2.4.21 with the stock nfs package. The
> clients are all recent version of CentOS or Redhat Linux with the most
> recent nfs-utils packages.
> 
> Thanks,
> -Adam
> 

-- 
Jeff Layton <jlayton@redhat.com>

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Re: Exporting Nested Directories

[Steve Dickson]

Adam Thomas wrote:
>  
> I'm trying to export two directories on the same filesystem. The exports 
> file looks something like this: 
>  
> /raid 192.168.1.0/23(rw,sync) <http://192.168.1.0/23(rw,sync)> 
> /raid/userdir 192.168.1.0/23(rw,sync) <http://192.168.1.0/23(rw,sync)> 
>  
> When I try to do this I get a lot of unusual behavior (some clients will 
> mount, but others won't even though they are within the same IP range). 
>  
> Are there any restriction with exporting a nested directory like this? 
No...

Try using the -v mount flag to see why the mount is failing...
Also there could be something in /var/log/message that might
explain the failure...

steved.

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