I screwed up an NFS share

[shimi]

On Fri, Jul 9, 2010 at 4:32 PM, Shlomo Solomon <shlomo.solomon at gmail.com>wrote:

> On Friday 09 July 2010, shimi wrote:
> > On Fri, Jul 9, 2010 at 3:46 PM, Shlomo Solomon >
> > 1. Change all_squash to root_squash in /etc/exports
> > 2. Run exportfs -a
>
> Bingo  - thanks
>
> I'm curious as to why this happened. As I wrote, I don't think I changed
> anything except for updating my wifes' machine. Is it possible that
> something
> changed in the NFS client (the upgrade on my wifes machine was from
> Mandriva
> 2007.1 to 2010.0)?
>
>
>
As you've noticed, to fix this, you chaged the server, not the client. The
client didn't have any issue here.

>From "man exports":

       all_squash
              Map all uids and gids to the anonymous user. Useful for
NFS-exported public FTP directories,
              news spool directories, etc. The opposite option is
no_all_squash, which is the default setting.

Not too surprisingly, the NFS server mapped your wife's UID to... the
anonymous user.

Quoting from your original e-mail:

Permissions seem OK. Here's an example of a file in
/public/share_all/shoshana
-rwxr-xr-x  1 shoshana shoshana  168448 2009-01-05 07:09 test.doc*

What permission do you see for the anonymous user? (e.g. "other") ? r-x ...
which is... read-only.

If your /etc/exports was not changed, and always worked like that, I cannot
explain this. Side of perhaps having a uid match between the anon NFS user
(on the NFS server) and you wife's uid...

-- Shimi
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