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problem: devfs and scsi tape permissions

To: devfs@xxxxxxxxxxx
Subject: problem: devfs and scsi tape permissions
From: Michael Reincke <reincke.m@xxxxxxxxxxxx>
Date: 17 Jan 2002 13:54:44 +0100
Organization: STN ATLAS Elektronik GmbH
Sender: owner-devfs@xxxxxxxxxxx
Hi,

i've some trouble with devfs and the permission on my SCSI-tape drive:

I'm using Linux-Kernel 2.4.7 and devfsd 1.3.11-7 from unstable Debian.

After a reboot the permissions on /dev/scsi/host0/bus0/target4/lun0 are as
follows
drwxr-xr-x    1 root     root            0 Jan  1  1970 lun0/

A request on the tape-drive as normal user gives a permission denied and
the permissions on /dev/scsi/host0/bus0/target4/lun0  are set to 
drw-------    1 root     root            0 Jan  1  1970 lun0/

all nodes in lun0 are having the right permissions:
ls -l /dev/scsi/host0/bus0/target4/lun0/

total 0
crw-rw----    1 root     tape       9,   0 Jan  1  1970 mt
crw-rw----    1 root     tape       9,  96 Jan  1  1970 mta
crw-rw----    1 root     tape       9, 224 Jan  1  1970 mtan
crw-rw----    1 root     tape       9,  32 Jan  1  1970 mtl
crw-rw----    1 root     tape       9, 160 Jan  1  1970 mtln
crw-rw----    1 root     tape       9,  64 Jan  1  1970 mtm
crw-rw----    1 root     tape       9, 192 Jan  1  1970 mtmn
crw-rw----    1 root     tape       9, 128 Jan  1  1970 mtn

So to get the whole thing work i need on /dev/scsi/host0/bus0/target4/lun0
the following permissions:
drwxrwx---    1 root     tape            0 Jan  1  1970 lun0
or
dr-xr-x---    1 root     tape            0 Jan  1  1970 lun0

How could i reach this??  I tried using CFUNCTION 

CREATE nst0 CFUNCTION GLOBAL chmod ${mntpnt}/scsi/host0/bus0/target4/lun0 770
CREATE nst0 CFUNCTION GLOBAL chown ${mntpnt}/scsi/host0/bus0/target4/lun0 0 26

but no work. Setiing the permissions by hand and activating saving and 
restoring the state is also not working.



-- 
Michael Reincke, NUT Team 2 (Software Build Management)

STN ATLAS Elektronik GmbH, Bremen (Germany)
E-mail : reincke.m@xxxxxxxxxxxx |  mail: Sebaldsbrücker Heerstr 235    
phone  : +49-421-457-2302       |        28305 Bremen                  
fax    : +49-421-457-3913       |



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