samba - Jan 2009 - smbcontrol smbd ping also answered by nmbd and winbindd

Hello,

with samba-3.0.x an "smbcontrol smbd ping" was answered by all running
smbd processes. With samba-3.2.x it is now *also* answered by nmbd and
winbindd:

[root@cs00 ~]# smbcontrol -V
Version 3.2.5
[root@cs00 ~]# for i in `smbcontrol -t 1 winbindd ping | grep PONG | awk
'{ print $4}'` ; do pstree -p | grep $i ; done
        winbindd(29908) - winbindd(29909)
[root@cs00 ~]# for i in `smbcontrol -t 1 nmbd ping | grep PONG | awk '{
print $4}'` ; do pstree -p | grep $i ; done
        nmbd(29266)

[root@cs00 ~]# for i in `smbcontrol -t 1 smbd ping | grep PONG | awk '{
print $4}'` ; do pstree -p | grep $i ; done
        smbd(29275)---smbd(29277)
        winbindd(29908)---winbindd(29909)
        nmbd(29266)

(I'm using SerNet RPMs for RHEL4 on an RHEL4u4 machine.)

With 3.0.30 it looked like this:

l1-auto-du:~ # smbcontrol -V
Version 3.0.30-s+c
l1-auto-du:~ # for i in `smbcontrol -t 1 smbd ping | grep PONG | awk '{
print $4}'` ; do pstree -p | grep $i ; done
        |-smbd(4587)-+-smbd(4591)
        |            |-smbd(5681)
[...]
        |            `-smbd(6431)

Is this known behaviour? What can be done about it?

Thanks,
-- 
Michael Weiser                science + computing ag
Senior Systems Engineer       Geschaeftsstelle Duesseldorf
                              Martinstrasse 47-55, Haus A
phone: +49 211 302 708 32     D-40223 Duesseldorf
fax:   +49 211 302 708 50     www.science-computing.de
-- 
Vorstand/Board of Management:
Dr. Bernd Finkbeiner, Dr. Roland Niemeier, 
Dr. Arno Steitz, Dr. Ingrid Zech
Vorsitzender des Aufsichtsrats/
Chairman of the Supervisory Board:
Michel Lepert
Sitz/Registered Office: Tuebingen
Registergericht/Registration Court: Stuttgart
Registernummer/Commercial Register No.: HRB 382196

On Tue, Jan 06, 2009 at 02:28:22PM +0100, Michael Weiser
wrote:
> Hello,
> 
> with samba-3.0.x an "smbcontrol smbd ping" was answered by all
running
> smbd processes. With samba-3.2.x it is now *also* answered by nmbd and
> winbindd:
> 
> [root@cs00 ~]# smbcontrol -V
> Version 3.2.5
> [root@cs00 ~]# for i in `smbcontrol -t 1 winbindd ping | grep PONG | awk
> '{ print $4}'` ; do pstree -p | grep $i ; done
>         winbindd(29908) - winbindd(29909)
> [root@cs00 ~]# for i in `smbcontrol -t 1 nmbd ping | grep PONG | awk '{
> print $4}'` ; do pstree -p | grep $i ; done
>         nmbd(29266)
> 
> [root@cs00 ~]# for i in `smbcontrol -t 1 smbd ping | grep PONG | awk '{
> print $4}'` ; do pstree -p | grep $i ; done
>         smbd(29275)---smbd(29277)
>         winbindd(29908)---winbindd(29909)
>         nmbd(29266)
> 
> (I'm using SerNet RPMs for RHEL4 on an RHEL4u4 machine.)
> 
> With 3.0.30 it looked like this:
> 
> l1-auto-du:~ # smbcontrol -V
> Version 3.0.30-s+c
> l1-auto-du:~ # for i in `smbcontrol -t 1 smbd ping | grep PONG | awk '{
> print $4}'` ; do pstree -p | grep $i ; done
>         |-smbd(4587)-+-smbd(4591)
>         |            |-smbd(5681)
> [...]
>         |            `-smbd(6431)
> 
> Is this known behaviour? What can be done about it?
Yeah - Herb found this problem, see this mail thread :

"http://markmail.org/message/iivngxhc4mwpdi4s#query:herb lewis smbcontrol
samba.org+page:1+mid:j5n4r27dnkiciemo+state:results"

for details. This got changed in the 3.3 source tree
(and beyond) but not in the 3.2.x tree.

Jeremy.

Hello Jeremy,

thanks for your answer.

On Wed, Jan 07, 2009 at 04:17:40PM -0800, Jeremy Allison
wrote:
> > with samba-3.0.x an "smbcontrol smbd ping" was answered by
all running
> > smbd processes. With samba-3.2.x it is now *also* answered by nmbd and
> > winbindd:
> Yeah - Herb found this problem, see this mail thread :
> "http://markmail.org/message/iivngxhc4mwpdi4s#query:herb lewis
smbcontrol samba.org+page:1+mid:j5n4r27dnkiciemo+state:results"
> for details. This got changed in the 3.3 source tree
> (and beyond) but not in the 3.2.x tree.
I backported the patch to 3.2.7. It applies cleanly and restores part of
the old behaviour. But: If smbd is not running, smbcontrol still reverts
to broadcasting which will again trigger answers from nmbd and winbindd.
In effect, ping can still not be used to determine if smbd is running or
not. This would also be the case for 3.3.

Can this be changed?

Thanks,
-- 
Michael Weiser                science + computing ag
Senior Systems Engineer       Geschaeftsstelle Duesseldorf
                              Martinstrasse 47-55, Haus A
phone: +49 211 302 708 32     D-40223 Duesseldorf
fax:   +49 211 302 708 50     www.science-computing.de
-- 
Vorstand/Board of Management:
Dr. Bernd Finkbeiner, Dr. Roland Niemeier, 
Dr. Arno Steitz, Dr. Ingrid Zech
Vorsitzender des Aufsichtsrats/
Chairman of the Supervisory Board:
Michel Lepert
Sitz/Registered Office: Tuebingen
Registergericht/Registration Court: Stuttgart
Registernummer/Commercial Register No.: HRB 382196