> > > As for unlink... How do you deal with having that thing
> > > mounted, mounting something _under_ it (so that vfsmount would be kept
> > > busy) and then unlinking that sucker?
> >
> > Yeah, that's a good point. Current patch doesn't deal with that.
> > Simplest solution could be to disallow submounting these. Don't think
> > it makes much sense anyway.
>
> Hmmm, cd foo.tgz/bar/baz.tgz/xyzzy makes sense, and it is implemented
> as a submount, no?
Yes, that certainly makes sense, but it's the same "special" mount,
which goes away automatically, so there isn't any problem with
unlinking with any number of such submounts.
But I don't want to explicitly prohibit submounting by normal mounts
either, if it's not too hard to handle, and Al's new vfsmount
refcounting scheme should take care of the difficult part of that.
Miklos
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