[Samba] Samba 4.7.4 + bind9 DLZ /backend/ dropping delegated domain

[Rowland Penny]

On Tue, 30 Jan 2018 11:24:42 +0000
Kristján Valur Jónsson <kristjan at rvx.is> wrote:

> Right, that is the _workaround_.  It'd be great to see that
> documented in the Wiki.

It is now.

> However, samba_dlz is supposed to support reload, and there has been
> work on that file to fix slow reload previously.
> I"m currently doing experiments to figure out what is going wrong.
> 
> One thing is clear, the messages from samba_dlz is confusing, since
> it is actually not "shutting down".
> Rather, samba_dlz, maintains a reference counted singleton of its
> state. What happens during reload is:
> 1) dlz_create is called.  The refcount is upped, same internal
> instance returned to named and* nothing is logged.*
> 2) dlz_configure() is called.
> 3) dlz_destroy() is called.  The refcount is decreased (from 2 to 1),
> nothing is destroyed, *but it incorrectly logs that it is shutting
> down!*
> 
> Clearly, bind expects to start a new instance of its dlz, initialize
> it, and then destroy the old instance.
> 

Still not sure where the problem lies, if you are only reading the Bind
source code, then the problem is a Bind one, but if you are also
reading the Samba code, then it could be a Samba one.

Rowland