[Samba] Share mounts in SMBv1 mode, but fails weirdly in SMBv2 mode

[L.P.H. van Belle]

This might be a kernel thing. 4.13.5-1 .. ? Archlinux? 

There where recently e-mail about this on technical. 
So maybe its not implemented parts in samba or mount commands (yet)

And i point to this : smb2_get_dfs_refer 
> > >> [13424.783242] CIFS VFS: ioctl error in smb2_get_dfs_refer rc=-2
> > >> [13424.789504] CIFS VFS: cifs_read_super: get root inode failed
 
To give an idea.. 
https://kernel.opensuse.org/cgit/kernel-source/diff/patches.fixes/0001-CIFS-implement-get_dfs_refer-for-SMB2.patch?id=98a4a0402b8b564b24414c3f2d6b0268f6843341 

This italian site shows exact the same problem.
http://forum.html.it/forum/showthread/t-2959605.html 

I suggest, lower you kernel to 4.9 somewhere around there. 
See if that works, and then try vers=2.1


Greetz, 

Louis




> -----Oorspronkelijk bericht-----
> Van: samba [mailto:samba-bounces at lists.samba.org] Namens 
> Rowland Penny via samba
> Verzonden: vrijdag 13 oktober 2017 14:14
> Aan: samba at lists.samba.org
> Onderwerp: Re: [Samba] Share mounts in SMBv1 mode, but fails 
> weirdly in SMBv2 mode
> 
> On Fri, 13 Oct 2017 14:00:34 +0200
> Hadrien Grasland via samba <samba at lists.samba.org> wrote:
> 
> > Le 13/10/2017 à 01:46, Jeremy Allison via samba a écrit :
> > > On Thu, Oct 12, 2017 at 03:58:58PM +0200, Hadrien Grasland via
> > > samba wrote:
> > >> Hi,
> > >>
> > >> We're slowly deprecating SMBv1 support at work, so I'm trying to
> > >> mount our Samba network shares using SMBv2.0. This should in
> > >> principle be supported by the server, and seems works well enough
> > >> for the Windows clients. But it fails for me with some 
> errors which
> > >> I do not understand.
> > >>
> > >> Can you help me figure out what's going on? Here's my system
> > >> configuration and a quick summary of what I have so far:
> > >>
> > >> hadrien at linux-2ak3:~> uname -a
> > >> Linux linux-2ak3 4.13.5-1-default #1 SMP PREEMPT Thu Oct 
> 5 18:28:26
> > >> UTC 2017 (3fd9659) x86_64 x86_64 x86_64 GNU/Linux
> > >> hadrien at linux-2ak3:~> /sbin/mount.cifs --version
> > >> mount.cifs version: 6.5
> > >> hadrien at linux-2ak3:~> sudo mount -v -t cifs 
> //nfsserv22/expsi test
> > >> -o credentials=<path to credentials file>,vers=2.0
> > >> domain=LAL
> > >> mount.cifs kernel mount options:
> > >> 
> ip=134.158.91.155,unc=\\nfsserv22\expsi,vers=2.0,user=grasland
,,domain=LAL,pass=********
> > >> mount error(95): Operation not supported Refer to the
> > >> mount.cifs(8) manual page (e.g. man mount.cifs)
> > >> hadrien at linux-2ak3:~> dmesg | tail [...]
> > >> [13424.783242] CIFS VFS: ioctl error in smb2_get_dfs_refer rc=-2
> > >> [13424.789504] CIFS VFS: cifs_read_super: get root inode failed
> > >>
> > >> Replacing "vers=2.0" with "vers=1.0" in the mount command line
> > >> makes this work, so I'm quite confident that my general
> > >> configuration is correct and the problem is somehow specific to
> > >> the SMBv2 protocol. However, I'm a Samba newbie and would welcome
> > >> any tips on how to extract more information from this
> > >> machine/server in order to figure out why SMBv2 specifically is
> > >> failing.
> > > Can you get a wireshark trace on port 445 between client and
> > > server ? That would help.
> > >
> > There you go. I attached it to the e-mail, not sure if that's the
> > proper way to send (small) files around on this list, if not please
> > tell me :)
> 
> OK, no it isn't ;-)
> 
> This list strips off any attachments, so either put it into 
> the post or
> post it somewhere and provide a link to it.
> 
> Rowland
> 
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