[gpfsug-discuss] Windows xattr/Samba

[Barry Evans]

Yep, that works a treat, thanks Jonathan!

I was missing ea support and the map = no options

Cheers,
Barry



On 15 Aug 2012, at 23:07, Jonathan Buzzard <j.buzzard at dundee.ac.uk> wrote:

> Barry Evans wrote:
>> Hello all,
>> 
>> Anyone had success with windows extended attributes actually passing
>> through samba over to GPFS?
>> 
>> On a 3.4.0-13 system with samba 3.5.11 when trying to set a file read
>> only through Win 7 explorer and attrib I get:
>> 
>> [2012/08/15 18:13:32.023966,  1]
>> modules/vfs_gpfs.c:1003(gpfs_get_xattr) gpfs_get_xattr: Get GPFS
>> attributes failed: -1
>> 
>> This is with gpfs:winattr set to yes. I also tried enabling 'store
>> dos attributes' for a laugh but the result was no different. I've not
>> tried bumping up the loglevel yet, this may reveal something more
>> interesting.
> 
> Hum, worked for me with 3.4.0-13 and now with 3.4.0-15, using samba3x
> packages that comes with CentOS 5.6 in the past and CentOS 5.8
> currently. Note I have to rebuild the Samba packages to get the vfs_gpfs
> module which you need to load. The relevant bits of the smb.conf are
> 
> # general options
>       vfs objects = shadow_copy2 fileid gpfs
> 
> # the GPFS stuff
>        fileid : algorithm = fsname
>        gpfs : sharemodes = yes
>        gpfs : winattr = yes
>        force unknown acl user = yes
>        nfs4 : mode = special
>        nfs4 : chown = no
>        nfs4 : acedup = merge
> 
> # store DOS attributes in extended attributes (vfs_gpfs then stores them
> in the file system)
>       ea support = yes
>       store dos attributes = yes
>       map readonly = no
>       map archive = no
>       map system = no
>       map hidden = no
> 
> 
> Though I would note that working out what all the configuration options
> required to make this (and other stuff) work where took some
> considerable amount of time. I guess there is a reason why IBM charge
> $$$ for the SONAS and StoreWise Unified products.
> 
> Note that if you are going for that full make my Samba/GPFS file server
> look as close as possible to a pucker MS Windows server, you might want
> to consider setting the following GPFS options
> 
>    cifsBypassShareLocksOnRename
>    cifsBypassTraversalChecking
>    allowWriteWithDeleteChild
> 
> All fairly self explanatory, and make GPFS follow Windows schematics
> more closely, though they are "undocumented".
> 
> There is also there is an undocumented option for ACL's on mmchfs (I am
> working on 3.4.0-15) so that you can do
> 
>     mmchfs test -k samba
> 
> Even shows up in the output of mmlsfs. Not entirely sure what samba
> ACL's are mind you...
> 
> 
> JAB.
> 
> --
> Jonathan A. Buzzard                      Tel: +441382-386998
> Storage Administrator, College of Life Sciences
> University of Dundee, DD1 5EH
> 
> The University of Dundee is a registered Scottish Charity, No: SC015096
> 
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