Jamie Lokier wrote: > With multiple X servers, there can be more than one currently logged in user. > > Same with multiple text consoles - that's more familiar. > > Which one owns /dev/vmch3? > For a VMM, copy/paste should work with whatever user has the active X session that's controlling the physical display. Yes, it could get complicated if we supported multiple video cards, but fortunately we don't :-) I really think you need to have a copy/paste daemon that allows multiple X sessions to connect to it and then that daemon can somehow determine who is the "active" session. This is part of the reason I've been pushing for a concrete example. All the signs here point to a privileged daemon that delegates to multiple users. I think just about any use-case will have a similar model. It really suggests that you need _one_ vmchannel that's exposed to userspace with a single userspace daemon that consumes it. You want the flexibility of a userspace daemon in determining how you multiplex and do security. I don't think it's something you want to bake into the userspace/kernel interface. And if you have a single daemon that serves vmchannel sessions, that daemon can make it transparent whether the session is going over /dev/ttyS0, a network device, /dev/hvc1, etc. Regards, Anthony Liguori _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/virtualization
