Re: [Question] Should libvirt update live xml accordingly when guest mac is changed?
On 8/30/22 05:22, Fangge Jin wrote:
Hi
I met an issue when testing trustGuestRxFilters:
Attach a macvtap interface with trustGuestRxFilters=’yes’ to vm, then
change interface mac address in vm.
Should libvirt update interface mac in live vm xml accordingly? If not,
vm network will be broken after
managedsaving and restoring vm.
BR,
Fangge Jin
The MAC is updated accordingly. It's just that it does not survive
save+restore (and thus possibly migration). This is a bug in libvirt,
please file one. What we could do is just before resuming vCPUs, we
could query-rx-filters for those <interface/>s where trustGuestRxFilters
is enabled and change MAC, just like we do when NIC_RX_FILTER_CHANGED
event is delivered.
Michal