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Date:      Tue, 25 Mar 2008 21:29:35 +0300
From:      "Alexander V. Chernikov" <melifaro@ipfw.ru>
To:        freebsd-fs@freebsd.org
Cc:        freebsd-current@FreeBSD.org
Subject:   unionfs status
Message-ID:  <47E9448F.1010304@ipfw.ru>

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Hello people!


At this moment unionfs has got at least following problems:
1) File systems cannot mount onto upper/lower unionfs layer (partially 
described in kern/117829)
2) There are problems with multithreaded programs accessing(writing) 
files on unionfs (kern/109950)
3) As well there are problems with accessing unix sockets created on 
upper/lower unionfs layers (kern/118346)
4) Doing mv filename same-filename causes kernel to panic on 6.X (and 
printing warning about VOP_RENAME in 7+)
5) Making 'loops' when mounting unionfs causes kernel panic (kern/121385)

I have made patches solving first 4 problems
These patches are available at http://ipfw.ru/patches/
unionfs2.diff fixes fs mounting onto upper layer, unionfs_lmount.diff 
fixes lower
unionfs_threads.diff and unionfs_unix.diff fixes cases 2) and 3)
unionfs_rename.diff fixes case with renaming

Can anybody comment/review ?

-- 
Alexander V. Chernikov
MELI-RIPE




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