unix extensions disabled by default

[Max-Ulrich Farber]

when mounting a cifs share by the command line
sudo mount -t cifs //192.168.178.23/Bilder_klein /mnt -o guest,rw
the cifs unix extensions are disabled by default. The mount option `unix` or `posix` is refused.

The command `mount` shows:
`//192.168.178.23/Bilder_klein on /mnt type cifs (rw,relatime,vers=3.1.1,sec=none,cache=strict,uid=0,noforceuid,gid=0,noforcegid,addr=192.168.178.23,file_mode=0755,dir_mode=0755,soft,nounix,serverino,mapposix,rsize=4194304,wsize=4194304,bsize=1048576,echo_interval=60,actimeo=1)`
Therefore the option `nounix` has been set by default, not according to `man mount.cifs`.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: cifs-utils 2:6.9-1
ProcVersionSignature: Ubuntu 5.4.0-33.37-generic 5.4.34
Uname: Linux 5.4.0-33-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.2
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Wed Jun 10 17:37:38 2020
InstallationDate: Installed on 2020-06-08 (2 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SourcePackage: cifs-utils
UpgradeStatus: No upgrade log present (probably fresh install)

[Sergio Durigan Junior (sergiodj)]

AFAIU, the work on SMBv3 UNIX extensions on Samba is ongoing:

https://wiki.samba.org/index.php/SMB3-Linux

So, while cifs-utils tries to use "unix" when mounting the share, Samba still doesn't support it, and therefore mount.cifs falls back to nounix.

This is not necessarily a bug; it's just something that is still being developed and will ship in future versions of Samba.

I am moving this bug to the samba package.

[Sergio Durigan Junior (sergiodj)]

Sorry, scratch that, I got confused and assumed that you were mounting a Samba share. I moved the bug back to cifs-utils.