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When looking up a domain, we try to look up by ID, UUID and NAME consequently while not really caring which of those lookups succeeds. The problem is that if any of them fails, we dispatch the error from the driver and that means setting both threadlocal and global error. Let's say the last lookup (by NAME) succeeds and resets the threadlocal error as any other API does, however leaving the global error unchanged. If the underlying virsh command does not succeed afterwards, our cleanup routine in vshCommandRun ensures that no libvirt error will be forgotten and that's exactly where this global error comes in incorrectly. # virsh domif-setlink 123 vnet1 up error: interface (target: vnet1) not found error: Domain not found: no domain with matching id 123 This patch also resets the global error which would otherwise cause some minor confusion in reported error messages. https://bugzilla.redhat.com/show_bug.cgi?id=1254152 Signed-off-by: Luyao Huang <lhuang@redhat.com> Signed-off-by: Erik Skultety <eskultet@redhat.com>
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>