NFS v3 inconsistent user permissions

English Network/Internet
#1 

#suse's /etc/fstab
/dev/sdb1 /windows/FAT vfat users,uid=1000,gid=100,rw,utf8=true



#/etc/exports
/windows/FAT 192.168.0.0/24(rw,root_squash,no_subtree_check)



#mint's /etc/fstab
suse-amd:/windows/FAT /media/nfs/suse-amd/FAT nfs rw,user 0 0

The main problem I was having was mapping different UID/GID over NFS v3. I managed to just have different ‘usernames’ but same UID/GID that would mount the share. And it sorta works. I can `touch’ a file on the terminal after mounting (NFS), but in both Nautilus and Thunar (on Mint v8) I get permission denied when i try to create new file → but a brand-new file appears in the file browser after refresh!

I run opensuse 11.2 with NFS3 sharing a FAT32 partition /windows/FAT. The username is ‘felipe’ with UID=1000 and GID=100. I mounted it with `uid=1000,gid=100’ vfat mount options (see above).

Ubuntu 9.10 machine (mint actually) connects to it successfully, but the user connecting to it is under a different username (ruben), different GID (1000), but same UID=1000.

I’m not sure if the error is in the /etc/exports, in the Mint `mount -t nfs’ command or in the file browsers nautilus and thunar.
**
Why do I get these errors in Nautilus/Thunar and not in a terminal?

How can I prevent these from happening?

What is the best way to share files from GNU to GNU machine?**

And clues or ideas would be very much appreciated!
(ps - nfs v4 is not possible ATM)

*edit: advice from a google search didn’t work:
/share *(rw,anonuid=150,anongid=100)
*

#2

Unfortunately the UIDs have to match. It works in a different way from CIFS. So you have to unify the UID space between the machines.

There is a service called rpc.ugidd that is supposed to be able to do UID mapping. Maybe you can look it up. I’ve never used it myself.

#3

On Tue, 2010-02-02 at 21:36 +0000, ken yap wrote:
> Unfortunately the UIDs have to match. It works in a different way from
> CIFS. So you have to unify the UID space between the machines.

Alternatively you could try NFS4 instead of NFS3 (if supported).

#4

Oh! NFS v4. Will it let me arbitrarily map UID’s?

#5

As long as the UIDs are the same, does the username matter at all? In the original posting, the UIDs on both machines was 1000, but names were different. `touch’ works, but permission-denied errors show in Nautilus, even though the write occurred!

#6

The permissions on the objects are based on the UIDs. It doesn’t matter what name is associated with the UID, but of course if you do a ls -l, the name that appears is that in the local /etc/passwd.