[PATCH] Fix for XDR Backend of NFS4ACL_XATTR module to get it working with NFS4.0 ACL Spec

[Sandeep Nashikkar]

On  Thur, July 26, 2018 Jeremy Allison via samba-technical wrote:
> FYI - what platform are you testing this on ?
>
> If I do the following as my own user on Linux/Debian:
> 
> $ touch foo
> $ setfattr -n system.nfs4_acl -v testme foo
> setfattr: foo: Operation not supported
>
> Even as root:
>
> # setfattr -n system.nfs4_acl -v testme foo
> setfattr: foo: Operation not supported
>
> Yet doing:
>
> $ setfattr -n user.nfs4_acl -v testme foo
>
> succeeds.
>
> - in other words, the 'system' namespace isn't accessible on Linux. I don't think we can hardcode the 'system' namespace here.
>
> Jeremy.

On the other hand, this can be easily controlled by a parameter in the plugin with command 
net conf setparm <share name> "nfs4acl_xattr:xattr_name" "system.nfs4_acl"

If it is not okay to hard code it in the plugin code, we can always keep it unchanged and rely on this parameter. 

Thanks,
Sandeep
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