aboutsummaryrefslogtreecommitdiff
path: root/COPYING
diff options
context:
space:
mode:
authorThibaut Collet <thibaut.collet@6wind.com>2015-10-09 17:17:31 +0200
committerMichael S. Tsirkin <mst@redhat.com>2015-10-22 14:34:49 +0300
commitf6f56291de879827766d17b172465d4377ad2c11 (patch)
tree7ecbe114c72953fb99d4395386a75dc264ab287f /COPYING
parent69b32a6ce4e1a6096a496996fcda833eb54e81b9 (diff)
vhost user: add support of live migration
Some vhost user backends are able to support live migration. To provide this service the following features must be added: 1. Add the VIRTIO_NET_F_GUEST_ANNOUNCE capability to vhost-net when netdev backend is vhost-user. 2. Provide a nop receive callback to vhost-user. This callback is called by: * qemu_announce_self after a migration to send fake RARP to avoid network outage for peers talking to the migrated guest. - For guest with GUEST_ANNOUNCE capabilities, guest already sends GARP when the bit VIRTIO_NET_S_ANNOUNCE is set. => These packets must be discarded. - For guest without GUEST_ANNOUNCE capabilities, migration termination is notified when the guest sends packets. => These packets can be discarded. * virtio_net_tx_bh with a dummy boot to send fake bootp/dhcp request. BIOS guest manages virtio driver to send 4 bootp/dhcp request in case of dummy boot. => These packets must be discarded. Signed-off-by: Thibaut Collet <thibaut.collet@6wind.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Tested-by: Thibaut Collet <thibaut.collet@6wind.com>
Diffstat (limited to 'COPYING')
0 files changed, 0 insertions, 0 deletions