Re: NFS: Problem with user and group IDs

[J. Bruce Fields]

On Tue, Jun 01, 2004 at 04:58:03PM +0200, Thomas Babut wrote:
> I've got a problem with 'squashing' user and group IDs under NFS.
> 
> On the NFS Server there is the directory /data/test with owner ID 1011 
> and group ID 100.
> 
> Here is the /etc/exports file on the NFS server:
> /data/test 
> 172.16.10.1(ro,root_squash,all_squash,anon_uid=65534,anongid=65534)
> 
> On the client side I mount it with the command:
> mount -t nfs 172.16.10.2:/data/test /mnt/test
> 
> After it has been successfully mounted, the directory on the client 
> system has the owner ID 1011 and group ID 100, like on the server.
> 
> But the expected result for me is, that on the client system the 
> directory has owner ID 65534 and group ID 65534 like it has been set in 
> the /etc/exports file on the server.

Root-squashing only modifies the way your client credentials are seen on
the server; it isn't applied to uid's that are returned to the client
e.g.  when listing a directory.  So if you create a new file as a user
on the client, that new file will be given anonymous uid and gid.  But
if you "ls" a directory, the uid's you see will be unaffected by
squashing.

--Bruce Fields
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