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Deleting a snapshot and all its descendants had problems with tracking the current snapshot. The deletion does not necessarily proceed in depth-first order, so a parent could be deleted before a child, wreaking havoc on passing the notion of the current snapshot to the parent. Furthermore, even if traversal were depth-first, doing multiple file writes to pass current up the chain one snapshot at a time is wasteful, comparing to a single update to the current snapshot at the end of the algorithm. * src/qemu/qemu_driver.c (snap_remove): Add field. (qemuDomainSnapshotDiscard): Add parameter. (qemuDomainSnapshotDiscardDescendant): Adjust accordingly. (qemuDomainSnapshotDelete): Properly reset current.
LibVirt : simple API for virtualization
Libvirt is a C toolkit to interact with the virtualization capabilities
of recent versions of Linux (and other OSes). It is free software
available under the GNU Lesser General Public License. Virtualization of
the Linux Operating System means the ability to run multiple instances of
Operating Systems concurrently on a single hardware system where the basic
resources are driven by a Linux instance. The library aim at providing
long term stable C API initially for the Xen paravirtualization but
should be able to integrate other virtualization mechanisms if needed.
Daniel Veillard <veillard@redhat.com>