nounix in smb mounts when using SMB2 protocol or higher

[Kristian Lauritsen]

Does anyone has a clue why I can't connect from Ubuntu to my samba server with SMB2 in a way that ownerships and
permissions are preserved ?

The samba team says this is not a bug.

see below



-------- Forwarded Message --------
Subject: Re: why i want a bugzilla account
Date: Fri, 19 Jan 2018 14:51:09 +0100
From: Björn Jacke <***@samba.org>
To: ***@picoquant.com, Kristian Lauritsen <***@picoquant.com>, bugzilla-***@samba.org



you might ask for guidance on the samba mailing list. this is not a bug.

I'm facing the following problem for which I haven't found any solution
nounix in smb mounts when using SMB2 protocol or higher
mount.cifs version: 6.4
Samba version 4.3.11-Ubuntu
samba file server runs on latest Ubuntu server 4.4.0-109-generic
#132-Ubuntu
Ubuntu clients are integrated through sssd
after applying the last update for Ubuntu the following misbehaviour
When connecting samba from an Ubuntu client with the smb protocol NT1
everything works as expected.
When using vers=2.0 the share is mounted with the nounix option which
leads all files to appear as owned by root.
# sudo mount.cifs //tera/vid /mnt --verbose -o
"username=kristian",vers=2.0
# mount
//tera/vid on /mnt type cifs
(rw,relatime,vers=2.0,sec=ntlmssp,cache=strict,username=kristian,domain=PQ,uid=0,noforceuid,gid=0,noforcegid,addr=10.0.1.200,file_mode=0755,dir_mode=0755,nounix,serverino,mapposix,rsize=65536,wsize=65536,echo_interval=60,actimeo=1)
total 2052
drwxr-xr-x  2 root root    0 Jan 29  2016 ./
drwxr-xr-x 25 root root 4096 Jan 19 11:06 ../
drwxr-xr-x  2 root root    0 Apr  5  2017 Analysis_Tutorials/
-rwxr-xr-x  1 root root 4096 Jan 29  2016 ._.DS_Store*
-rwxr-xr-x  1 root root 8196 Aug 29 15:51 .DS_Store*
drwxr-xr-x  2 root root    0 Jun  3  2015 LSM_Acquisition/
drwxr-xr-x  2 root root    0 Jun 10  2015 PQWS2014_raw/
drwxr-xr-x  2 root root    0 Nov  4  2014 TRF2014_Talks/
drwxr-xr-x  2 root root    0 Mai  9  2016 TRMic2015_raw/
drwxr-xr-x  2 root root    0 Jul 21  2015 Video_Workshop_WS20/
drwxr-xr-x  2 root root    0 Apr 11  2012 X02_MT200_Film/
drwxr-xr-x  2 root root    0 MÀr 19  2012 X03_easyTau_TRES_wizard/
smbstatus |grep kristian
14850     kristian      domain users  10.1.10.137 
(ipv4:10.1.10.137:56654) SMB2_02
~$ sudo mount.cifs //tera/vid /mnt --verbose -o
"username=kristian",vers=1.0
~$ mount
//tera/vid on /mnt type cifs
(rw,relatime,vers=1.0,cache=strict,username=kristian,domain=PQ,uid=0,noforceuid,gid=0,noforcegid,addr=10.0.1.200,unix,posixpaths,serverino,mapposix,acl,rsize=1048576,wsize=65536,echo_interval=60,actimeo=1)
~$ ll /mnt
drwxrwxr-x+ 10 root       domain users    0 Jan 29  2016 ./
drwxr-xr-x  25 root       root         4096 Jan 19 11:06 ../
drwxrwxrwx+ 27 ruettinger domain users    0 Apr  5  2017
Analysis_Tutorials/
-rwxr--r--+  1 ruettinger domain users 4096 Jan 29  2016 ._.DS_Store*
-rwxr--r--+  1 ruettinger domain users 8196 Aug 29 15:51 .DS_Store*
drwxrwxr-x+  6 ruettinger domain users    0 Jun  3  2015
LSM_Acquisition/
drwxrwxr-x+  5 ruettinger domain users    0 Jun 10  2015 PQWS2014_raw/
drwxrwxr-x+  5 ruettinger domain users    0 Nov  4  2014 TRF2014_Talks/
drwxrwxr-x+ 16 ruettinger domain users    0 Mai  9  2016 TRMic2015_raw/
drwxrwx--x+  8 jana       domain users    0 Jul 21  2015
Video_Workshop_WS20/
drwxrwxrwx+  2 ruettinger domain users    0 Apr 11  2012
X02_MT200_Film/
drwxr-xr-x+  3 ruettinger domain users    0 MÀr 19  2012
X03_easyTau_TRES_wizard/
smbstatus |grep kristian
14866     kristian      domain users  10.1.10.137 
(ipv4:10.1.10.137:56732) NT1
any ideas what's going wrong ?
We really would like to use the current SMB protocol for all users.
best regards
Kristian