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Keir Fraser
07943d8e2d
I've checked the duplicate-check code here and I found that's checked only in the context of one domain but not cross-domain. The thing is that we should check tap/vbd device cross-domain not to allow another guest to use the same disk image in some circumstances to prevent VM's disk corruption. The patch included denies disk image addition under those circumstances: 1. We're adding read-only disk that's already used as write-exclusive 2. We're adding write-shared disk that's already used as write-exclusive 3. We're adding write-exclusive disk that's already used 4. We're adding read-only disk that's already used as write-shared* (because of I/O caching issues etc.) The vif device duplicate check remains the same it was and it's checked in the context of current domain only so that behaviour has been preserved. Signed-off-by: Michal Novotny <minovotn@redhat.com>
The file test.py here is from the Zope project, and is Copyright (c) 2001, 2002 Zope Corporation and Contributors. This file is released under the Zope Public License, version 2.0, a copy of which is in the file ZPL-2.0.