id summary reporter owner description type status priority milestone component resolution keywords cc fix_version see_also 744 Make Linux AFS able to work with union mounts geofft "This is a followup to #463. Although we don't intend to use union mounts in AFS in our current design — just in tmpfs and ext[234] — there are definite use cases where it can be useful, such as the thing we've talked about for a while where you can union-mount a locker at /, between the local disk and the login tmpfs, to provide software in more normal locations than /mit/something. Although most of the code is in the VFS layer, each filesystem needs a tiny bit of explicit support for union mounts, among other things the current design wants [http://thread.gmane.org/gmane.comp.file-systems.ext4/22021 additional file types for whiteouts and fallthrus] akin to those for fifos, devices, normal files, etc. That support is going into more normal filesystems (including tmpfs and ext); it would be great to have those patches prepared and ready for OpenAFS once union mount support is usable on normal filesystems. If someone ends up tackling #248, this would be a good thing to look into while you're there." enhancement new trivial The Distant Future login chroot