[stgt] tgt and DVD

Matthias Bannach matthias at bannach.net
Fri Sep 25 17:04:56 CEST 2009

> > I think it would be quite a lot of work but worthwhile
> > 1, add emulation of writing to a dvd to cdemu. This is not that very
> > hard, at least if you only aim to support to burning to single-session
> > dvds.
> > 2, should probably work with the cdemu people and break
> > cdemud-device.c out into a separate link library that tgtd could link
> > to.
> > (maybe keep mmc.c still around as a last resort and use it if
> > cdemud-device.a is not available?)
> > 3, rework the public api in cdemud-device.c to remove exposing the
> > glib/dbus dependencies and make the exposed api only use posix types.
> > (I think one very attractive feature of the tgtd codebase is that it
> > has so few dependencies on headers from other packages)
> >
> >
> > 1 is only important if we want to keep the "tgtd can burn to emulated
> > blank disks" feature.
> > 2 would open up code sharing and reuse between cdemu and tgtd, and
> > other projects that want to access a scsi mmc emulation library.
> > 3 is only my personal view. I really like that tgtd does not depend on
> > glib or other external packages.
> Yeah, agreed. cdemu is released under GPL. I prefer just exploiting
> (or stealing) their code.
> I have no time to work on multi-session support but patches are very
> welcome.

3 sounds like a perfect trade-off. As an additional module, like 'mmc', it
would allow for enhanced 'read-only' functionality, 'light' integration, and
additional functionality. It may also facilitate a cleaner integration with
simplified up-merges.


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