Re: take away nfs write permissions instantly

[Kapeller Rene PSI <rene.kapeller@psi.ch>]

Neil Brown wrote:
> On Thursday June 20, rene.kapeller@psi.ch wrote:
> 
>>Can anyone help me on the following problem:
>>
>>In order to take away nfs write permissions instantly for a previously 
>>mounted
>>nfs directory called '/data', I'm changing the export options for '/data'
>>on the server to 'ro', while keeping the mount on the client.
>>
>>exportfs -io ro,sync,wdelay,no_root_squash nfsclient:/data
> 
>                                              ^^^^^^^^^
> 
>>exportfs -v
>>/data   nfsserver(ro,wdelay,no_root_squash)
> 
>           ^^^^^^^^^
> 
> Presumably both should read "nfsclient" - yes?
> 
> This should work.
> 
> What version of nfs-utils are you using?? (showmount -v)
> 
> What does /proc/fs/nfs/exports say for nfsclient after you try to
> re-export it?
> 
> Can you give more details?  What is in /etc/exports that relates to
> the client (is it a wildcard export, a netgroup export...)..
> 
> NeilBrown


To be precise, the entry in the /etc/exports looks like this:
/data2  172.19.0.0/255.255.0.0(ro,sync,no_root_squash)

exportfs -v
/data2        	172.19.0.0/255.255.0.0(ro,wdelay,no_root_squash)

cat /proc/fs/nfs/exports
/data2 
pc3691.slspn.psi.ch(rw,no_root_squash,sync,wdelay) # 172.19.84.51

Ooops ...!

I'm using RedHat-7.3 on the server and on the client (nfs-utils-0.3.3-5)

Rene




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