samba - Oct 2007 - using cifs to access posix acl from a linux client

Hi,
We would like to mount a Linux server running samba using a cifs mount
from a linux client (linux->linux) and still be able to access the
extended attributes. 

Acl's work on the native filesystem, however when we mount the samba
server on the Linux client using
mount -t cifs //localhost/test test -o username=xxx

Then the extended attributes are no longer visible, only the default
posix rights. Any idea's?

native: 
-rw-rw-r--+ 1 iris iris 60 2007-10-13 13:06 /media/sdb1/test/c

cifs share:
-rw-rw-r-- 1 iris   iris   60 2007-10-13 13:06 c

The "+" is missing, hence extended attributes are neglected.

Server and client Ubuntu Gutsy 3.0.26,
in de smb.cfg we enabled everything we could find relating to acl's:
unix extensions = yes
ea support = yes
nt acl support = yes
map acl inherit = yes
inherit acls = yes
acl compatibility = yes

acl is compiled into the samba suite.

gr.
Robert

> We would like to mount a Linux server running samba 
> using a cifs mount from a linux client (linux-> 
> linux) and still be able to access the
> extended attributes. 
>
> Acl's work on the native filesystem, however when we
> mount the samba server on the Linux client using
> mount -t cifs //localhost/test test -o username=xxx
>
> Then the extended attributes are no longer visible,
> only the default posix rights. Any idea's?
My experience over the last year in probing deeply
into the interaction of Linux ACLs with Samba (but I'm
not a Samba expert and coult be wrong:-) is "you can't
get there from here". 

While you can get Samba to pretty much use the Linux
ACLs on the _server_ side, Linux ACLs will never
behave _exactly_ the same way they do for a user who's
directly logged on nor will they be visible to the
_client_. 

I found the implementation of Linux ACLs to still be a
little more off the beaten path than I assumed naively
at first. It interacts weirdly with quotas; I can
crash it (admittedly my kernel is now out of date). I
had to get a special version of `rsync` that
understood and propagated Linux ACLs (the regular one
doesn't). And I'm even a little doubtful about full
support in NFS.

good luck!


-Chuck Kollars


       
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