Fwd: CentOS cifs client sees Windows 2012 deduplicated files as symlinks

[Niels Basjes <Niels-WkKhAqUkEt5mR6Xm/wNWPw@public.gmane.org>]

Hi,

Last week I ran into a serious problem from my CentOS 7 system using
the cifs client to mount a volume on a Windows 2012-R2 server.
I posted this a problem on ServerFault (
http://serverfault.com/q/697393 ) a few days ago but I thought that it
is usefull to ask here too.
I included some screenshots in the serverfault page so that may be
useful to have a look at.

The essence of my problem is that the local Windows sysadmin turned on
a feature to deduplicate files on an existing Windows server volume.
After that my Linux system started seeing all the files that were
deduplicated as symlinks to what I can only describe as 'chinese
letters'.
Under Windows 7 everything works fine.

The way I currently look at this is that what is apparently some kind
of 'copy-on-write hardlink' on the Windows server is interpreted as a
softlink by the cifs client in my CentOS system.

I have been experimenting with some mount settings but I have been
unable to fix this problem (other than turning off the deduplication).

My current (Client) setup:
- CentOS 7.0
- samba-client-4.1.1-38.el7_0.x86_64
- samba-common-4.1.1-38.el7_0.x86_64
- samba-libs-4.1.1-38.el7_0.x86_64
- cifs-utils-6.2-7.el7.x86_64

The command in my /etc/fstab

\\xxxxxxxx\file\video /var/www/html/wp-content/uploads cifs
nouser_xattr,nounix,iocharset=utf8,credentials=/etc/fstab.cifs.sa_video.credentials,_netdev,uid=apache,gid=apache,rw,auto
0 0

How do I get the Linux to see these files as files again?


-- 
Best regards / Met vriendelijke groeten,

Niels Basjes