[Samba] How can I confirm that idmap_ad is being used?

[Kai Lanz]

Hi Daniel,

On May 17, 2011, at 5:50 AM, Zabel, Daniel wrote:

> Have a look at:
>
> log.winbindd-idmap

I've looked at that file; it's empty. (Not a single entry.) I run my  
tests with "winbindd -n -d 10 -D".

> Also have a look at:
> https://bugzilla.samba.org/show_bug.cgi?id=6322

Now, this is interesting! The problem Edgar Holleis describes sounds  
exactly like the one I am facing. See my
post to the Samba mailing list, "Winbindd can't convert between SIDs  
and uid/gid". Edgar said:
> Winbind correctly resolves:
> User-Name->SID (wbinfo -n), Group-Name->SID (wbinfo -s)
> What doesn't work:
> SID->UID (wbinfo -S), UID->SID (wbinfo -U),
> SID->GID (wbinfo -Y), GID->UID (wbinfo -G)
(Except, "wbinfo -s" is SID->User-name, the reverse of "wbinfo -n",  
not Group-Name->SID as Edgar wrote...)
That's the same pattern of success and failure I get in my wbinfo tests.

So, how does one go from Edgar's bug report, with 4 failing wbinfo  
queries, to your comment, "wbinfo resolves
everything correctly"? I'm running samba-3.5.8 on OpenSolaris.  
Following Michael Adam's example, I tried the
following in my smb.conf:

    idmap backend = tdb
    idmap uid = 50000 - 99999
    idmap gid = 50000 - 99999

    idmap config SU : backend = ad
    idmap config SU : schema_mode = rfc2307
    idmap config SU : range = 10000 - 29999
    idmap config WIN : backend = ad
    idmap config WIN : schema_mode = rfc2307
    idmap config WIN : range = 30000 - 49999

Note the disjoint ranges for each domain. I still get the same  
failures with wbinfo S, U, G, and Y. It seems I'm
still missing something, since our wbinfo doesn't "resolve everything  
correctly". Is nsswitch.conf important,
perhaps? It doesn't seem to make any difference whether I add  
"winbind" to the passwd and group lines or
not. Is that expected?

> -----Ursprüngliche Nachricht-----
> Von: samba-bounces at lists.samba.org [mailto:samba-bounces at lists.samba.org 
> ] Im Auftrag von Kai Lanz
> Gesendet: Dienstag, 17. Mai 2011 02:56
> An: samba at lists.samba.org
> Betreff: [Samba] How can I confirm that idmap_ad is being used?
>
>
> How can I confirm that idmap_ad is being called?
>
> I've configured Samba with --with-shared-modules=idmap_ad, built and  
> installed it; the file ad.so is now present in /usr/local/samba/lib/  
> idmap/ as expected. I then added the following to smb.conf:
>
>    idmap backend = tdb
>    idmap uid = 65536 - 999999
>    idmap gid = 65536 - 999999
>
>    idmap config SU : backend = ad
>    idmap config SU : schema_mode = rfc2307
>    idmap config SU : range = 1 - 65535
>    idmap config WIN : backend = ad
>    idmap config WIN : schema_mode = rfc2307
>    idmap config WIN : range = 1 - 65535
>
> Now I fire up winbindd with debug-level = 10, and issue some queries  
> via wbinfo. Some requests work as expected, some fail, but when I  
> look in log.winbindd I never see any reference to idmap.c or  
> idmap_ad.c. I'd like to confirm that this module is being used.
>
> I went so far as to deliberately break the smb.conf by specifying
>
>    idmap config SU range = 1 -
>
> which I expected to produce an error from idmap_ad_initialize(),  
> "invalid filter range". But that message is never logged; instead I  
> see only errors from winbindd_util.c, add_trusted_domain():
>
> [2011/05/16 16:57:11.442318,  1] winbindd/winbindd_util.c:
> 204(add_trusted_domain)
>   invalid range syntax in idmap config SU: 1 -
>
> Have I missed out on some crucial bit of configuration that's  
> required to enable idmap_ad?
>
> -- 
> Kai Lanz      Stanford University      School of Earth Sciences
>
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-- 
Kai Lanz