[SMB3POSIX] File attributes

[ronnie sahlberg]

On Tue, 14 Nov 2023 at 19:16, Ralph Boehme via samba-technical
<samba-technical at lists.samba.org> wrote:
>
> On 11/13/23 18:50, Jeremy Allison wrote:
> > On Mon, Nov 13, 2023 at 12:28:18PM +0100, Ralph Boehme wrote:
> >> We had support for file atttributes in the CIFS UNIX extensions, this
> >> is currently not in the spec (or code) for SMB3 POSIX.
> >>
> >> Is this intentional? What is the reason?
> >
> > Do you mean the attributes listed by:
> >
> > man chattr.
>
> yes.
>
> > chattr - change file attributes on a Linux file system
> >
> > This was at the insitence of Steve as I recall.
>
> adding Steve to the loop.
>
> > We never implemented this.
> >
> > Might be done via a tunnelling ioctl ? Other thoughts ?
>
> well, it's a rabbit hole of its own and still seem to be rarely used on
> Linux and the BSDs. It's not POSIX anyway so just declare it out of
> scope for now?

Not to derail, but "chattr +i" is not a rabbithole. It is very much real.
If you are going to set up and run bind locally on a systemd-resolved
infected system
you literally must use chattr +i to stop it from ruining your /etc/resolv.conf

>
> The Linux interface is via ioctls so doing it over the wire via SMB2
> IOCTLs looks like a good way forward allowing us to ignore this for now
> and possibly add it later if there's demand and resources to implement it.
>
> -slow