[linux-cifs-client] CIFS not mounting Windows Shares (Adnan)

[Steve French]

> Subject: [linux-cifs-client] CIFS not mounting Windows Shares
> To: linux-cifs-client at lists.samba.org
> Message-ID: <c3frcj$8ut$1 at sea.gmane.org>
> 
> Hi all,
> 
> It is very important for me to get CIFS VFS running on my system. I have
> compiled CFS version 1.02b in the kernel (not as a module) using the
> direction in the README. I have also compiled mount.cifs from the Samba vers
> 3.0.2rc2 source (version 1.0) and using it. I have also tried it with the
> mount.cifs that is on the website (version 1.1) . All gives me the same
> result.
> 
> When I mount either a Windows 2000 or Windows XP (home or professional
> server) using the following command my mount command is
> 
> mount -t cifs //192.168.1.35/e$ /mnt -o
> user=administrator,password=Passw0rd01
> 
> I get the message that
> 
> mount error 22 = Invalid argument
> 
> my /var/log/syslog gave me this message
> 
> Mar 18 15:57:36 rv2400 kernel: CIFS VFS: Error -32 sending data on socket to
> server.
> 
> Mar 18 15:57:36 rv2400 kernel: CIFS VFS: cifs_mount failed w/return code
> = -5
> 
> So I looked more into the documentation and enabled debug (change the
> 
> contents of /proc/fs/cifs/cifsFYI to 1).
> 
> And I using the same mount command above, I get the same message but the
> message in /var/log/syslog is
> 
> Mar 18 16:47:28 rv2400 kernel: connect.c: CIFS VFS: in cifs_mount as Xid: 4
> with uid: 0 Mar 18 16:47:28 rv2400 kernel: connect.c: Username:
> administrator
> 
> Mar 18 16:47:28 rv2400 kernel: connect.c: UNC: \\192.168.1.35\c$
> 
> Mar 18 16:47:28 rv2400 kernel: connect.c: Socket created
> 
> Mar 18 16:47:28 rv2400 kernel: connect.c: Demultiplex PID: 1394
> 
> Mar 18 16:47:28 rv2400 kernel: connect.c: tcp session abended prematurely
> (after SMBnegprot)
> 
> Mar 18 16:47:28 rv2400 kernel: connect.c: About to exit from demultiplex
> thread
> 
> Mar 18 16:47:28 rv2400 kernel: connect.c: Existing smb sess not found
> 
> Mar 18 16:47:28 rv2400 kernel: connect.c: CIFS VFS: leaving cifs_mount (xid
> = 4) rc = -2
> 
> Mar 18 16:47:28 rv2400 kernel: CIFS VFS: cifs_mount failed w/return code
> = -2
> 
> My environment:
> 
> Mandrake Linux 9.0
> 
> Kernel version: 2.4.19-16mdksmp
> 
> Using 3-ware SATA card with 1.3TB on the SATA drives
> 
> Oh, the smbfs mounts the drives without any problem. The reason I am using
> CIFS is because of speed and it doesn't have 2GB file limit (as I have been
> told).
> 
> Thanks a lot in advance
> 
> Adnan

The symptoms shown by your debug log entries match what happens when the
cifs client attempts to mount older servers to Windows9x or Windows NT
(prior to Windows 2000). I have not seen this happen to Windows 2000 or
later but perhaps the servers will do if the list of allowed
workstations is restricted through the Windows admin gui since without
the rfc1001 session initialize a clients can not identify their
(netbios) workstation name.   Older operating systems (such as NT4)
which do not support "native TCP" require that the first frame sent be
RFC1001 ("Netbios over TCP") netbios session initialize (before the SMB
negotiate protocol request) which the cifs client does not sent.  This
would not be too hard to add though.

Other possible less likely reasons could be hitting a tcp session.  Let
me know if you are restricting the hostnames/workstation names that can
connect to your system since the symptom indicates that the server is
taking down the tcp session before responding even to the first SMB
request.