Re: How to handle non-local renames?

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On Thu, Sep 28, 2006 at 08:31:18AM -0400, Trond Myklebust wrote:
> > We don't _care_ if lookup() is not from rename.  That's OK.
> 
> You can't assume that you can always kill the subdirectories: they may
> be in use. Even if no actual processes are using them, I may have
> submounts.

So what?  Actual processes will get -ESTALE and STFU, submounts can
bloody well stay where they are; since we don't free dentries, WTF
would VFS care?  Mark inodes so that nothing would be done to those
directories, unhash them and be done with it.  umount -l will be
able to take them out just fine afterwards.  *Or* we could even
try and play with detaching them (needed on invalidation anyway).
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