Re: [libvirt] [PATCH 0/6] handle NIC_RX_FILTER_CHANGED events from qemu

These patches set up an event handler for qemu's NIC_RX_FILTER_CHANGED event, which is sent whenever a guest makes a change to a network device's unicast/multicast filter, vlan table, or MAC address. The handler checks if it is appropriate to respond to the NIC_RX_FILTER_CHANGED event (based on device type and configuration) and takes appropriate action. Currently it checks if the guest interface has been configured with trustGuestRxFilters='yes' (defaults to 'no' for security reasons), and if the host side device is macvtap. If so, and the MAC address on the guest has changed, the MAC address of the macvtap device is changed to match. The result of this is that networking from the guest will continue to work if the mac address of a macvtap-connected network device is changed from within the guest, as long as trustGuestRxFilters='yes' (previously changing the MAC address in the guest would break networking). I still need to add code to compare the old and new unicast and multicast lists and program the filters in the macvtap to match the guest, and to check for a non-empty vlan table and handle that (currently that means just setting promiscuous mode on the macvtap), but that can come in a followup series.

Laine Stump (6): conf: add trustGuestRxFilters attribute to network and domain interface network: set interface actual trustGuestRxFilters from network/portgroup util: define virNetDevRxFilter and basic utility functions qemu: qemuMonitorQueryRxFilter - retrieve guest netdev rx-filter qemu: setup infrastructure to handle NIC_RX_FILTER_CHANGED event qemu: change macvtap device MAC address in response to NIC_RX_FILTER_CHANGED docs/formatdomain.html.in | 38 +++- docs/formatnetwork.html.in | 28 ++- docs/schemas/domaincommon.rng | 5 + docs/schemas/network.rng | 10 + src/conf/domain_conf.c | 42 ++++ src/conf/domain_conf.h | 3 + src/conf/network_conf.c | 35 ++++ src/conf/network_conf.h | 2 + src/libvirt_private.syms | 9 + src/network/bridge_driver.c | 11 + src/qemu/qemu_domain.h | 1 + src/qemu/qemu_driver.c | 105 ++++++++++ src/qemu/qemu_monitor.c | 39 ++++ src/qemu/qemu_monitor.h | 11 + src/qemu/qemu_monitor_json.c | 232 +++++++++++++++++++++ src/qemu/qemu_monitor_json.h | 3 + src/qemu/qemu_process.c | 42 ++++ src/util/virnetdev.c | 40 ++++ src/util/virnetdev.h | 57 ++++- tests/Makefile.am | 3 + tests/networkxml2xmlin/vepa-net.xml | 4 +- tests/networkxml2xmlout/vepa-net.xml | 4 +- .../qemuxml2argv-net-virtio-network-portgroup.xml | 4 +- 23 files changed, 711 insertions(+), 17 deletions(-)