Ideas on using locking.tdb from Netatalk to implement combined share mode database

[Jeremy Allison]

On Wed, Feb 23, 2011 at 08:24:52PM +0100, Frank Lahm wrote:
> 2011/2/23 Jeremy Allison <jra at samba.org>:
> > On Wed, Feb 23, 2011 at 04:06:00PM +0100, Frank Lahm wrote:
> >> Dear hackers,
> >>
> >> I'm in the process of a decent rewrite of certain Netatalk (Opensource
> >> AFP filserver) subsystems. One of them is acess/deny mode subsytem
> >> which is the AFP pendant to share modes in CIFS. We're currently
> >> storing these as brls -- an ancient but working hack.
> >>
> >> I'm now about to rewrite this stuff to use a tbd database. In order to
> >> have a fully spec conforming cross-platform server (Samba for Win
> >> clients, Netatlak for AFP clients) it would be necessary to integrate
> >> both sytems.
> >>
> >> So I went ahead poking around in source3, hoping I could find a way where
> >> - Netatalk's afpd processes would be able to use Samba's locking.tdb
> >> (if configured to do so)
> >>
> >> I've found "include/smb_share_modes.h" and libsmbsharemodes which look
> >> promising.
> >>
> >> Semantic differences [1] let aside for now, could this approach work out!
> >
> > libsmbsharemodes was designed for exactly this purpose and used
> > by the NetWare file sharing daemon code on Linux.
> 
> Great!
> 
> >
> > Let me know if it will work for you - changes and updates
> > are welcome !
> 
> How is cleanup in case of eg a crash supposed to happen? There's no
> way to go through the locks by pid, deleting any lock for which the
> process is gone, is there?
> Or is such cleanup builtin ?

smbd has this cleanup builtin. It's not built into the libsmbsharemodes
api.

Jeremy.