[Samba] Do Unix extensions still work with SMB3?

Rowland Penny rpenny at samba.org
Sat Oct 14 10:07:55 UTC 2017

On Sat, 14 Oct 2017 19:08:48 +1000
Adam Nielsen via samba <samba at lists.samba.org> wrote:

> Hi all,
> Quick question - does Samba server still support Unix extensions when
> connecting over SMB3?

Quick answer - No

> My Linux client recently got upgraded to a CIFS module version that
> uses SMB3 by default, and since then I lost the ability to create
> symlinks on my CIFS shares.  Running "mount" shows the share mounted
> with the "nounix" option.  If I follow the advice in dmesg and add
> the mount option "vers=1.0" to return to SMB1, then Unix extensions
> are enabled and symlinks work fine.
> The server is a Seagate NAS appliance running Samba 4.6.2, with "unix
> extensions = yes" in the [global] section of smb.conf.
> Do I need to change the way Unix extensions are activated for SMB3?

You cannot - Yet, it is being worked on.


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