Re: [PATCH] cifs: Allow to set extended attribute cifs_acl (repost)

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On Tue, 8 Mar 2011 09:17:48 -0600
Shirish Pargaonkar <shirishpargaonkar@xxxxxxxxx> wrote:

> On Tue, Mar 8, 2011 at 8:32 AM, Jeff Layton <jlayton@xxxxxxxxxx> wrote:
> > On Mon,  7 Mar 2011 23:00:25 -0600
> > shirishpargaonkar@xxxxxxxxx wrote:
> >
> >> From: Shirish Pargaonkar <shirishpargaonkar@xxxxxxxxx>
> >>
> >>
> >> Allow setting cifs_acl on the server.
> >> Pass on to the server the ACL blob generated by an application.
> >> cifs is just a pass-through, server decides whether to enforce/apply
> >> the ACL blob composed by an application.
> >>
> >>
> >> Signed-off-by: Shirish Pargaonkar <shirishpargaonkar@xxxxxxxxx>
> >
> > Seems sane enough and is probably more useful than trying to map all of
> > this to POSIX acl's and modes. I wonder though...if you do this, then
> > the permissions and possibly ownership change. Do you need to
> 
> owner/group will not change, only the ACL (DACL).
> 

So I can't change group ownership on the file by modifying the DACL?

Also, while I don't particularly like the cifsacl acl-to-mode mapping
code, it still exists. If someone changes the ACL, don't you need to
account for the possibility that the mode has also changed?

-- 
Jeff Layton <jlayton@xxxxxxxxxx>
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