[Samba] TDB databases on x86_64 and ppc64

[Andrew Bartlett]

On Tue, 2020-01-14 at 14:19 +0000, Rowland penny via samba wrote:
> On 14/01/2020 13:50, Philipp Gesang via samba wrote:
> > Hi Jeremy,
> > 
> > -<| Quoting Jeremy Allison via samba <jra at samba.org>, on Monday, 2020-01-13 10:34:09 AM |>-
> > > On Mon, Jan 13, 2020 at 01:19:18PM +0100, Matthias Leopold via samba wrote:
> > > > Hi,
> > > > 
> > > > just to be sure:
> > > > can I use TDB databases that were created on ppc64 on a x86_64 platform?
> > > Yes, the database internal structures are all endian-independent
> > > and I believe all persistent database useage within Samba itself
> > > is also endian-indepentent. Not the transient databases of course
> > > but they get recreated on startup.
> > in which category do SIDs fall? I remember this thread from a
> > while back:
> > 
> >      https://lists.samba.org/archive/samba-technical/2018-October/130601.html
> > 
> > Philipp
> 
> Mentioning SIDs made me pause for thought, wont all the .tdb files be 
> littered with SIDs ?
> 
> So, I think that everything would have to be cloned between the old ppc 
> Samba standalone server and the new standalone server.

As far as we know we only made that mistake once, in the code recording
the SID for the server, not generally for all SIDs.  The ACLs in
share_info.tdb in particular will have been pushed with platform-
independent NDR.

To fix the secrets.tdb issue just run 'net getlocalsid' and then after
the migration 'net setlocalsid'.

Andrew Bartlett

-- 
Andrew Bartlett                       http://samba.org/~abartlet/
Authentication Developer, Samba Team  http://samba.org
Samba Developer, Catalyst IT          http://catalyst.net.nz/services/samba