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Libvirt provides a portable, long term stable C API for managing the
virtualization technologies provided by many operating systems. It
includes support for QEMU, KVM, Xen, LXC, bhyve, Virtuozzo, VMware
vCenter and ESX, VMware Desktop, Hyper-V, VirtualBox and the POWER
Hypervisor.
3738cf41f1
This resolves: https://bugzilla.redhat.com/show_bug.cgi?id=881480 These three functions: virDomainNetGetActualBridgeName virDomainNetGetActualDirectDev virDomainNetGetActualDirectMode return attributes that are in a union whose contents are interpreted differently depending on the actual->type and so they should only return non-0 when actual->type is 'bridge' (in the first case) or 'direct' (in the other two cases, but I had neglected to do that, so ...DirectDev() was returning bridge.brname (which happens to share the same spot in the union with direct.linkdev) if actual->type was 'bridge', and ...BridgeName was returning direct.linkdev when actual->type was 'direct'. How does this involve Bug 881480 (which was about the inability to switch between two networks that both have "<forward mode='bridge'/> <bridge name='xxx'/>"? Whenever the return value of virDomainNetGetActualDirectDev() for the new and old network definitions doesn't match, qemuDomainChangeNet() requires a "complete reconnect" of the device, which qemu currently doesn't support. ...DirectDev() *should* have been returning NULL for old and new, but was instead returning the old and new bridge names, which differ. (The other two functions weren't causing any behavioral problems in virDomainChangeNet(), but their problem and fix was identical, so I included them in this same patch). |
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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>