samba - Jul 2016 - bugged mount with Synology as client.

Hi,

I have some weird issue I don't know how to tackle.

When I share a folder from a Unix (Linux) machine using a current 
version of Samba (smbd) and I mount it on an older Synology (2.6.32) the 
reading of files goes fine.

However all files I create get the chacacters #EF80AF affixed to the 
filename, which is a Unicode code point for private extensions, or 
something of the kind.

Perhaps it also means "left-to-right", I don't know.

The CIFS kernel module might very well be modified by Synology, I don't 
know.

Although modinfo just produces the following (without parms):

filename:       /nas/home/cifs.ko
version:        1.61
description:    VFS to access servers complying with the SNIA CIFS 
Specification e.g. Samba and Windows
license:        GPL
author:         Steve French <sfrench at us.ibm.com>
srcversion:     BAD2BA742996F91AC9BA4E4
depends:
vermagic:       2.6.32.12 mod_unload ARMv5

 From another current Linux machine (same kind, I guess) operation is 
flawless, no problem whatsoever from what I can see.

Actually that #EF80AF is getting prefixed, not affixed, in that sense 
that a filename may become (on the server):

00000000  ef 80 af 77 65 69 72 64  0a                       |...weird.|
00000009

(where the newline is just added by ls). So #ef80af is utf-8. There is 
no other log output on the part of the server.

Unix extensions are in affect but in fact even .... I'm sorry, reading 
stuff also doesn't work.

A regular file requested that was written by another host (and has 
normal characters in the name) results in "File not found" when trying
to e.g. cat.

"No such file or directory."

Do I need to compile a new kernel module? I guess I'll start doing that 
but it has to come from the 2.6.32 tree so it will be that same older 
module probably.

So I just absolutely don't know what is going on. If you can help, 
please.!.

I wrote here how my filenames are getting mangled when getting sent or 
received to the server.

Server: current Ubuntu lookalike.

Client: Older Synology diskstation with probably a modified mount.cifs.

When I send utf-8 it gets received as dos.

"é" for instance is #c3a9 in utf-8, and it is used by the server as
#c3,
#a9, two separate bytes, becoming é.

The server is just configured with defaults for "dos" and
"unix"
clients.

The client tries to use iocharset=utf8.

What can I do to enforce utf8 being recognised by the server?

It apparently thinks it is talking to a dos client.

But unix extensions are being negotiated because the client sees the 
permissions and ownership of the separate files.


Anyone know what to do? Do I need a different mount.cifs?

Regards.

On Mon, Jul 11, 2016 at 11:41:24PM +0200, Xen wrote:
> I wrote here how my filenames are getting mangled when getting sent
> or received to the server.
> 
> Server: current Ubuntu lookalike.
> 
> Client: Older Synology diskstation with probably a modified mount.cifs.
> 
> When I send utf-8 it gets received as dos.
> 
> "é" for instance is #c3a9 in utf-8, and it is used by the server
as
> #c3, #a9, two separate bytes, becoming é.
> 
> The server is just configured with defaults for "dos" and
"unix"
> clients.
> 
> The client tries to use iocharset=utf8.
> 
> What can I do to enforce utf8 being recognised by the server?
Set the parameter:

 unix charset = utf8

in the [global] section of the synology smb.conf.