AFAIK, FiST (which underlies the referenced "support" for unionfs on Solaris) was never updated past Solaris 7/SunOS 5.7. That's a problem, because it depends on the (private, uncommitted, and all-too-undocumented!) vfs interface, which changed at least from 5.7 to 5.8 (to add support for umount -f, I think); not sure what if any subsequent changes there have been. I've wanted to play with FiST, but didn't stumble across it 'til I was already running Solaris 8, so no go; and updating it myself would've been rough (see below for part of why).
Sure would be nice if there were a doc on the vfs interface. I understand it's one of the few places left for adding certain types of magic, so it may well never become committed (unless there's some way to achieve both extensibility and compatibility - maybe the last change provides a hook for that?). But there will always be non-Sun filesystem implementations (AFS, DCE/DFS, VxFS, ...), and a pseudo-NFS server isn't always a suitable approach. Since it's not a committed interface (at least not yet), a history of version-to-version changes, and a heads-up on any upcoming changes (so filesystem maintainers could update their code), would be a big help too. This message posted from opensolaris.org _______________________________________________ opensolaris-discuss mailing list opensolaris-discuss@opensolaris.org
