https://bugzilla.redhat.com/show_bug.cgi?id=1447618 Currently, any attempt to change MTU on an interface that is plugged to a running domain is silently ignored. We should either do what's asked or error out. Well, we can update the host side of the interface, but we cannot change 'host_mtu' attribute for the virtio-net device. Therefore we have to error out. Signed-off-by: Michal Privoznik <mprivozn@xxxxxxxxxx> --- src/qemu/qemu_hotplug.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c index 8066acae3..d46956d98 100644 --- a/src/qemu/qemu_hotplug.c +++ b/src/qemu/qemu_hotplug.c @@ -3138,6 +3138,12 @@ qemuDomainChangeNet(virQEMUDriverPtr driver, /* vlan can be modified, and will be checked later */ /* linkstate can be modified */ + if (olddev->mtu != newdev->mtu) { + virReportError(VIR_ERR_OPERATION_UNSUPPORTED, "%s", + _("cannot modify MTU")); + goto cleanup; + } + /* allocate new actual device to compare to old - we will need to * free it if we fail for any reason */ -- 2.13.0 -- libvir-list mailing list libvir-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvir-list
