On Tue, Dec 6, 2016 at 12:24 AM, Andreas Grünbacher
<andreas.gruenbacher@xxxxxxxxx> wrote:
> 2016-12-06 0:19 GMT+01:00 Andreas Grünbacher <andreas.gruenbacher@xxxxxxxxx>:
>> It's not hard to come up with a heuristic that determines if a
>> system.nfs4_acl value is equivalent to a file mode, and to ignore the
>> attribute in that case. (The file mode is transmitted in its own
>> attribute already, so actually converting .) That way, overlayfs could
>> still fail copying up files that have an actual ACL. It's still an
>> ugly hack ...
>
> Actually, that kind of heuristic would make sense in the NFS client
> which could then hide the "system.nfs4_acl" attribute.
Even simpler would be if knfsd didn't send the attribute if not
necessary. Looks like there's code actively creating the nfs4_acl on
the wire even if the filesystem had none:
pacl = get_acl(inode, ACL_TYPE_ACCESS);
if (!pacl)
pacl = posix_acl_from_mode(inode->i_mode, GFP_KERNEL);
What's the point?
Thanks,
Miklos
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